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14a5cf38 1/*
5cb43542
RGS		 2 * perlio.c
3 * Copyright (c) 1996-2006, Nick Ing-Simmons
2eee27d7 4 * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Larry Wall and others
5cb43542
RGS		 5 *
6 * You may distribute under the terms of either the GNU General Public License
7 * or the Artistic License, as specified in the README file.
760ac839
LW		 8 */
9
14a5cf38 10/*
d31a8517
AT		 11 * Hour after hour for nearly three weary days he had jogged up and down,
12 * over passes, and through long dales, and across many streams.
4ac71550
TC		 13 *
14 * [pp.791-792 of _The Lord of the Rings_, V/iii: "The Muster of Rohan"]
d31a8517
AT		 15 */
16
166f8a29
DM		 17/* This file contains the functions needed to implement PerlIO, which
18 * is Perl's private replacement for the C stdio library. This is used
19 * by default unless you compile with -Uuseperlio or run with
20 * PERLIO=:stdio (but don't do this unless you know what you're doing)
21 */
22
d31a8517 23/*
71200d45 24 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 25 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 26 * Invent a dSYS macro to abstract this out
14a5cf38 27 */
7bcba3d4
NIS		 28#ifdef PERL_IMPLICIT_SYS
29#define dSYS dTHX
30#else
31#define dSYS dNOOP
32#endif
33
6f9d8c32 34#define PERLIO_NOT_STDIO 0
760ac839 35/*
6f9d8c32 36 * This file provides those parts of PerlIO abstraction
88b61e10 37 * which are not #defined in perlio.h.
6f9d8c32 38 * Which these are depends on various Configure #ifdef's
760ac839
LW		 39 */
40
41#include "EXTERN.h"
864dbfa3 42#define PERL_IN_PERLIO_C
760ac839
LW		 43#include "perl.h"
44
32af7c23
CL		 45#ifdef PERL_IMPLICIT_CONTEXT
46#undef dSYS
47#define dSYS dTHX
48#endif
49
0c4f7ff0
NIS		 50#include "XSUB.h"
51
25bbd826
CB		 52#ifdef VMS
53#include <rms.h>
54#endif
55
abf9167d
DM		 56#define PerlIO_lockcnt(f) (((PerlIOl*)(f))->head->flags)
57
1b7a0411 58/* Call the callback or PerlIOBase, and return failure. */
b32dd47e 59#define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
1b7a0411 60 if (PerlIOValid(f)) { \
46c461b5 61 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH		 62 if (tab && tab->callback) \
63 return (*tab->callback) args; \
64 else \
65 return PerlIOBase_ ## base args; \
66 } \
67 else \
68 SETERRNO(EBADF, SS_IVCHAN); \
69 return failure
70
71/* Call the callback or fail, and return failure. */
b32dd47e 72#define Perl_PerlIO_or_fail(f, callback, failure, args) \
1b7a0411 73 if (PerlIOValid(f)) { \
46c461b5 74 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH		 75 if (tab && tab->callback) \
76 return (*tab->callback) args; \
77 SETERRNO(EINVAL, LIB_INVARG); \
78 } \
79 else \
80 SETERRNO(EBADF, SS_IVCHAN); \
81 return failure
82
83/* Call the callback or PerlIOBase, and be void. */
b32dd47e 84#define Perl_PerlIO_or_Base_void(f, callback, base, args) \
1b7a0411 85 if (PerlIOValid(f)) { \
46c461b5 86 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH		 87 if (tab && tab->callback) \
88 (*tab->callback) args; \
89 else \
90 PerlIOBase_ ## base args; \
1b7a0411
JH		 91 } \
92 else \
93 SETERRNO(EBADF, SS_IVCHAN)
94
95/* Call the callback or fail, and be void. */
b32dd47e 96#define Perl_PerlIO_or_fail_void(f, callback, args) \
1b7a0411 97 if (PerlIOValid(f)) { \
46c461b5 98 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH		 99 if (tab && tab->callback) \
100 (*tab->callback) args; \
37725cdc
NIS		 101 else \
102 SETERRNO(EINVAL, LIB_INVARG); \
1b7a0411
JH		 103 } \
104 else \
105 SETERRNO(EBADF, SS_IVCHAN)
106
89a3a251
JH		 107#if defined(__osf__) && _XOPEN_SOURCE < 500
108extern int fseeko(FILE *, off_t, int);
109extern off_t ftello(FILE *);
110#endif
111
76e6dc3a
KW		 112#define NATIVE_0xd CR_NATIVE
113#define NATIVE_0xa LF_NATIVE
114
a0c21aa1
JH		 115EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
116
71ab4674
SP		 117int
118perlsio_binmode(FILE *fp, int iotype, int mode)
119{
120 /*
121 * This used to be contents of do_binmode in doio.c
122 */
123#ifdef DOSISH
71ab4674 124 dTHX;
58c0efa5 125 PERL_UNUSED_ARG(iotype);
71ab4674
SP		 126#ifdef NETWARE
127 if (PerlLIO_setmode(fp, mode) != -1) {
128#else
129 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
130#endif
71ab4674
SP		 131 return 1;
132 }
133 else
134 return 0;
71ab4674
SP		 135#else
136# if defined(USEMYBINMODE)
137 dTHX;
58c0efa5
RGS		 138# if defined(__CYGWIN__)
139 PERL_UNUSED_ARG(iotype);
140# endif
71ab4674
SP		 141 if (my_binmode(fp, iotype, mode) != FALSE)
142 return 1;
143 else
144 return 0;
145# else
146 PERL_UNUSED_ARG(fp);
147 PERL_UNUSED_ARG(iotype);
148 PERL_UNUSED_ARG(mode);
149 return 1;
150# endif
151#endif
152}
71ab4674 153
06c7082d 154#ifndef O_ACCMODE
22569500 155#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS		 156#endif
157
158int
159PerlIO_intmode2str(int rawmode, char *mode, int *writing)
160{
de009b76 161 const int result = rawmode & O_ACCMODE;
06c7082d
NIS		 162 int ix = 0;
163 int ptype;
164 switch (result) {
165 case O_RDONLY:
166 ptype = IoTYPE_RDONLY;
167 break;
168 case O_WRONLY:
169 ptype = IoTYPE_WRONLY;
170 break;
171 case O_RDWR:
172 default:
173 ptype = IoTYPE_RDWR;
174 break;
175 }
176 if (writing)
177 *writing = (result != O_RDONLY);
178
179 if (result == O_RDONLY) {
180 mode[ix++] = 'r';
181 }
182#ifdef O_APPEND
183 else if (rawmode & O_APPEND) {
184 mode[ix++] = 'a';
185 if (result != O_WRONLY)
186 mode[ix++] = '+';
187 }
188#endif
189 else {
190 if (result == O_WRONLY)
191 mode[ix++] = 'w';
192 else {
193 mode[ix++] = 'r';
194 mode[ix++] = '+';
195 }
196 }
43e5477e
JH		 197#if O_BINARY != 0
198 /* Unless O_BINARY is different from zero, bit-and:ing
199 * with it won't do much good. */
06c7082d
NIS		 200 if (rawmode & O_BINARY)
201 mode[ix++] = 'b';
43e5477e 202# endif
06c7082d
NIS		 203 mode[ix] = '\0';
204 return ptype;
205}
206
eb73beca
NIS		 207#ifndef PERLIO_LAYERS
208int
209PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
210{
6874a2de
NIS		 211 if (!names || !*names
212 || strEQ(names, ":crlf")
213 || strEQ(names, ":raw")
214 || strEQ(names, ":bytes")
215 ) {
14a5cf38
JH		 216 return 0;
217 }
218 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
219 /*
71200d45 220 * NOTREACHED
14a5cf38
JH		 221 */
222 return -1;
eb73beca
NIS		 223}
224
13621cfb
NIS		 225void
226PerlIO_destruct(pTHX)
227{
228}
229
f5b9d040
NIS		 230int
231PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
232{
14a5cf38 233 return perlsio_binmode(fp, iotype, mode);
f5b9d040 234}
60382766 235
e0fa5af2 236PerlIO *
ecdeb87c 237PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 238{
822c8b4d 239#if defined(PERL_MICRO)
0553478e 240 return NULL;
faf55891 241#elif defined(PERL_IMPLICIT_SYS)
22569500 242 return PerlSIO_fdupopen(f);
0553478e 243#else
faf55891 244# ifdef WIN32
30753f56 245 return win32_fdupopen(f);
faf55891 246# else
e0fa5af2 247 if (f) {
884fc2d3 248 const int fd = PerlLIO_dup_cloexec(PerlIO_fileno(f));
e0fa5af2 249 if (fd >= 0) {
06c7082d 250 char mode[8];
faf55891 251# ifdef DJGPP
dcda55fc 252 const int omode = djgpp_get_stream_mode(f);
faf55891 253# else
dcda55fc 254 const int omode = fcntl(fd, F_GETFL);
faf55891 255# endif
06c7082d 256 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 257 /* the r+ is a hack */
06c7082d 258 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS		 259 }
260 return NULL;
261 }
262 else {
93189314 263 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 264 }
faf55891 265# endif
e0fa5af2 266 return NULL;
0553478e 267#endif
e0fa5af2
NIS		 268}
269
270
14a5cf38 271/*
71200d45 272 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 273 */
ee518936
NIS		 274
275PerlIO *
14a5cf38
JH		 276PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
277 int imode, int perm, PerlIO *old, int narg, SV **args)
278{
7cf31beb
NIS		 279 if (narg) {
280 if (narg > 1) {
3b8752bb 281 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 282 }
14a5cf38
JH		 283 if (*args == &PL_sv_undef)
284 return PerlIO_tmpfile();
285 else {
41188aa0 286 STRLEN len;
74622586 287 const char *name = SvPV_const(*args, len);
41188aa0 288 if (!IS_SAFE_PATHNAME(name, len, "open"))
c8028aa6
TC		 289 return NULL;
290
3b6c1aba 291 if (*mode == IoTYPE_NUMERIC) {
884fc2d3 292 fd = PerlLIO_open3_cloexec(name, imode, perm);
14a5cf38 293 if (fd >= 0)
de009b76 294 return PerlIO_fdopen(fd, mode + 1);
14a5cf38
JH		 295 }
296 else if (old) {
297 return PerlIO_reopen(name, mode, old);
298 }
299 else {
300 return PerlIO_open(name, mode);
301 }
302 }
303 }
304 else {
305 return PerlIO_fdopen(fd, (char *) mode);
306 }
307 return NULL;
ee518936
NIS		 308}
309
15eb3045 310XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
0c4f7ff0
NIS		 311XS(XS_PerlIO__Layer__find)
312{
14a5cf38
JH		 313 dXSARGS;
314 if (items < 2)
315 Perl_croak(aTHX_ "Usage class->find(name[,load])");
316 else {
dcda55fc 317 const char * const name = SvPV_nolen_const(ST(1));
14a5cf38
JH		 318 ST(0) = (strEQ(name, "crlf")
319 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
320 XSRETURN(1);
321 }
0c4f7ff0
NIS		 322}
323
324
325void
326Perl_boot_core_PerlIO(pTHX)
327{
14a5cf38 328 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS		 329}
330
ac27b0f5
NIS		 331#endif
332
32e30700 333
6f9d8c32 334/*======================================================================================*/
14a5cf38 335/*
71200d45 336 * Implement all the PerlIO interface ourselves.
9e353e3b 337 */
760ac839 338
76ced9ad
NIS		 339#include "perliol.h"
340
6f9d8c32 341void
14a5cf38
JH		 342PerlIO_debug(const char *fmt, ...)
343{
14a5cf38
JH		 344 va_list ap;
345 dSYS;
e17bc05a
TC		 346
347 if (!DEBUG_i_TEST)
348 return;
349
d732c5e5
JH		 350 va_start(ap, fmt);
351
582588d2 352 if (!PL_perlio_debug_fd) {
284167a5 353 if (!TAINTING_get &&
985213f2
AB		 354 PerlProc_getuid() == PerlProc_geteuid() &&
355 PerlProc_getgid() == PerlProc_getegid()) {
582588d2
NC		 356 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
357 if (s && *s)
0b5984d3
Z		 358 PL_perlio_debug_fd = PerlLIO_open3_cloexec(s,
359 O_WRONLY | O_CREAT | O_APPEND, 0666);
582588d2 360 else
0b5984d3 361 PL_perlio_debug_fd = PerlLIO_dup_cloexec(2); /* stderr */
582588d2 362 } else {
64320867
TC		 363 /* tainting or set*id, so ignore the environment and send the
364 debug output to stderr, like other -D switches. */
0b5984d3 365 PL_perlio_debug_fd = PerlLIO_dup_cloexec(2); /* stderr */
582588d2 366 }
14a5cf38 367 }
27da23d5 368 if (PL_perlio_debug_fd > 0) {
70ace5da 369#ifdef USE_ITHREADS
dcda55fc 370 const char * const s = CopFILE(PL_curcop);
70ace5da
NIS		 371 /* Use fixed buffer as sv_catpvf etc. needs SVs */
372 char buffer[1024];
1208b3dd 373 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
048eef38
TC		 374# ifdef USE_QUADMATH
375# ifdef HAS_VSNPRINTF
376 /* my_vsnprintf() isn't available with quadmath, but the native vsnprintf()
377 should be, otherwise the system isn't likely to support quadmath.
378 Nothing should be calling PerlIO_debug() with floating point anyway.
379 */
380 const STRLEN len2 = vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
381# else
382 STATIC_ASSERT_STMT(0);
383# endif
384# else
1208b3dd 385 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
048eef38 386# endif
b469f1e0 387 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2));
70ace5da 388#else
dcda55fc
AL		 389 const char *s = CopFILE(PL_curcop);
390 STRLEN len;
550e2ce0
NC		 391 SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
392 (IV) CopLINE(PL_curcop));
14a5cf38
JH		 393 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
394
b83604b4 395 s = SvPV_const(sv, len);
b469f1e0 396 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, s, len));
14a5cf38 397 SvREFCNT_dec(sv);
70ace5da 398#endif
14a5cf38
JH		 399 }
400 va_end(ap);
6f9d8c32
NIS		 401}
402
9e353e3b
NIS		 403/*--------------------------------------------------------------------------------------*/
404
14a5cf38 405/*
71200d45 406 * Inner level routines
14a5cf38 407 */
9e353e3b 408
16865ff7
DM		 409/* check that the head field of each layer points back to the head */
410
411#ifdef DEBUGGING
412# define VERIFY_HEAD(f) PerlIO_verify_head(aTHX_ f)
413static void
414PerlIO_verify_head(pTHX_ PerlIO *f)
415{
416 PerlIOl *head, *p;
417 int seen = 0;
dd791c72
JH		 418#ifndef PERL_IMPLICIT_SYS
419 PERL_UNUSED_CONTEXT;
420#endif
16865ff7
DM		 421 if (!PerlIOValid(f))
422 return;
423 p = head = PerlIOBase(f)->head;
424 assert(p);
425 do {
426 assert(p->head == head);
427 if (p == (PerlIOl*)f)
428 seen = 1;
429 p = p->next;
430 } while (p);
431 assert(seen);
432}
433#else
434# define VERIFY_HEAD(f)
435#endif
436
437
14a5cf38 438/*
71200d45 439 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 440 */
05d1247b 441#define PERLIO_TABLE_SIZE 64
6f9d8c32 442
8995e67d
DM		 443static void
444PerlIO_init_table(pTHX)
445{
446 if (PL_perlio)
447 return;
448 Newxz(PL_perlio, PERLIO_TABLE_SIZE, PerlIOl);
449}
450
451
452
760ac839 453PerlIO *
5f1a76d0 454PerlIO_allocate(pTHX)
6f9d8c32 455{
14a5cf38 456 /*
71200d45 457 * Find a free slot in the table, allocating new table as necessary
14a5cf38 458 */
303f2dc3
DM		 459 PerlIOl **last;
460 PerlIOl *f;
a1ea730d 461 last = &PL_perlio;
14a5cf38
JH		 462 while ((f = *last)) {
463 int i;
303f2dc3 464 last = (PerlIOl **) (f);
14a5cf38 465 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
303f2dc3 466 if (!((++f)->next)) {
4e0ef342 467 goto good_exit;
14a5cf38
JH		 468 }
469 }
470 }
303f2dc3 471 Newxz(f,PERLIO_TABLE_SIZE,PerlIOl);
14a5cf38
JH		 472 if (!f) {
473 return NULL;
474 }
303f2dc3 475 *last = (PerlIOl*) f++;
4e0ef342
DD		 476
477 good_exit:
abf9167d 478 f->flags = 0; /* lockcnt */
303f2dc3 479 f->tab = NULL;
16865ff7 480 f->head = f;
303f2dc3 481 return (PerlIO*) f;
05d1247b
NIS		 482}
483
a1ea730d
NIS		 484#undef PerlIO_fdupopen
485PerlIO *
ecdeb87c 486PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 487{
04892f78 488 if (PerlIOValid(f)) {
de009b76 489 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
e17bc05a 490 DEBUG_i( PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param) );
210e727c
JH		 491 if (tab && tab->Dup)
492 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
37725cdc
NIS		 493 else {
494 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
495 }
a1ea730d 496 }
210e727c
JH		 497 else
498 SETERRNO(EBADF, SS_IVCHAN);
499
500 return NULL;
a1ea730d
NIS		 501}
502
503void
303f2dc3 504PerlIO_cleantable(pTHX_ PerlIOl **tablep)
05d1247b 505{
303f2dc3 506 PerlIOl * const table = *tablep;
14a5cf38
JH		 507 if (table) {
508 int i;
303f2dc3 509 PerlIO_cleantable(aTHX_(PerlIOl **) & (table[0]));
14a5cf38 510 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
303f2dc3
DM		 511 PerlIOl * const f = table + i;
512 if (f->next) {
513 PerlIO_close(&(f->next));
14a5cf38
JH		 514 }
515 }
3a1ee7e8 516 Safefree(table);
14a5cf38 517 *tablep = NULL;
05d1247b 518 }
05d1247b
NIS		 519}
520
fcf2db38
NIS		 521
522PerlIO_list_t *
3a1ee7e8 523PerlIO_list_alloc(pTHX)
fcf2db38 524{
14a5cf38 525 PerlIO_list_t *list;
96a5add6 526 PERL_UNUSED_CONTEXT;
a02a5408 527 Newxz(list, 1, PerlIO_list_t);
14a5cf38
JH		 528 list->refcnt = 1;
529 return list;
fcf2db38
NIS		 530}
531
532void
3a1ee7e8 533PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 534{
14a5cf38
JH		 535 if (list) {
536 if (--list->refcnt == 0) {
537 if (list->array) {
14a5cf38 538 IV i;
ef8d46e8
VP		 539 for (i = 0; i < list->cur; i++)
540 SvREFCNT_dec(list->array[i].arg);
14a5cf38
JH		 541 Safefree(list->array);
542 }
543 Safefree(list);
544 }
545 }
fcf2db38
NIS		 546}
547
548void
3a1ee7e8 549PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 550{
334e202e 551 PerlIO_pair_t *p;
b37c2d43
AL		 552 PERL_UNUSED_CONTEXT;
553
14a5cf38 554 if (list->cur >= list->len) {
00195859 555 const IV new_len = list->len + 8;
14a5cf38 556 if (list->array)
00195859 557 Renew(list->array, new_len, PerlIO_pair_t);
14a5cf38 558 else
00195859
HS		 559 Newx(list->array, new_len, PerlIO_pair_t);
560 list->len = new_len;
14a5cf38
JH		 561 }
562 p = &(list->array[list->cur++]);
563 p->funcs = funcs;
564 if ((p->arg = arg)) {
f84c484e 565 SvREFCNT_inc_simple_void_NN(arg);
14a5cf38 566 }
fcf2db38
NIS		 567}
568
3a1ee7e8
NIS		 569PerlIO_list_t *
570PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
571{
b37c2d43 572 PerlIO_list_t *list = NULL;
694c95cf
JH		 573 if (proto) {
574 int i;
575 list = PerlIO_list_alloc(aTHX);
576 for (i=0; i < proto->cur; i++) {
a951d81d 577 SV *arg = proto->array[i].arg;
24d147a6 578#ifdef USE_ITHREADS
a951d81d
BL		 579 if (arg && param)
580 arg = sv_dup(arg, param);
581#else
582 PERL_UNUSED_ARG(param);
583#endif
694c95cf
JH		 584 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
585 }
3a1ee7e8
NIS		 586 }
587 return list;
588}
4a4a6116 589
05d1247b 590void
3a1ee7e8 591PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 592{
3aaf42a7 593#ifdef USE_ITHREADS
303f2dc3
DM		 594 PerlIOl **table = &proto->Iperlio;
595 PerlIOl *f;
3a1ee7e8
NIS		 596 PL_perlio = NULL;
597 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
598 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
8995e67d 599 PerlIO_init_table(aTHX);
e17bc05a 600 DEBUG_i( PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto) );
3a1ee7e8
NIS		 601 while ((f = *table)) {
602 int i;
303f2dc3 603 table = (PerlIOl **) (f++);
3a1ee7e8 604 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
303f2dc3
DM		 605 if (f->next) {
606 (void) fp_dup(&(f->next), 0, param);
3a1ee7e8
NIS		 607 }
608 f++;
609 }
610 }
1b6737cc 611#else
a25429c6 612 PERL_UNUSED_CONTEXT;
1b6737cc
AL		 613 PERL_UNUSED_ARG(proto);
614 PERL_UNUSED_ARG(param);
3aaf42a7 615#endif
9a6404c5
DM		 616}
617
618void
13621cfb
NIS		 619PerlIO_destruct(pTHX)
620{
303f2dc3
DM		 621 PerlIOl **table = &PL_perlio;
622 PerlIOl *f;
694c95cf 623#ifdef USE_ITHREADS
e17bc05a 624 DEBUG_i( PerlIO_debug("Destruct %p\n",(void*)aTHX) );
694c95cf 625#endif
14a5cf38
JH		 626 while ((f = *table)) {
627 int i;
303f2dc3 628 table = (PerlIOl **) (f++);
14a5cf38 629 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
303f2dc3 630 PerlIO *x = &(f->next);
dcda55fc 631 const PerlIOl *l;
14a5cf38 632 while ((l = *x)) {
cc6623a8 633 if (l->tab && l->tab->kind & PERLIO_K_DESTRUCT) {
e17bc05a 634 DEBUG_i( PerlIO_debug("Destruct popping %s\n", l->tab->name) );
14a5cf38
JH		 635 PerlIO_flush(x);
636 PerlIO_pop(aTHX_ x);
637 }
638 else {
639 x = PerlIONext(x);
640 }
641 }
642 f++;
643 }
644 }
13621cfb
NIS		 645}
646
647void
a999f61b 648PerlIO_pop(pTHX_ PerlIO *f)
760ac839 649{
dcda55fc 650 const PerlIOl *l = *f;
16865ff7 651 VERIFY_HEAD(f);
14a5cf38 652 if (l) {
e17bc05a
TC		 653 DEBUG_i( PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f,
654 l->tab ? l->tab->name : "(Null)") );
cc6623a8 655 if (l->tab && l->tab->Popped) {
14a5cf38
JH		 656 /*
657 * If popped returns non-zero do not free its layer structure
658 * it has either done so itself, or it is shared and still in
71200d45 659 * use
14a5cf38 660 */
f62ce20a 661 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH		 662 return;
663 }
abf9167d
DM		 664 if (PerlIO_lockcnt(f)) {
665 /* we're in use; defer freeing the structure */
666 PerlIOBase(f)->flags = PERLIO_F_CLEARED;
667 PerlIOBase(f)->tab = NULL;
668 }
669 else {
670 *f = l->next;
671 Safefree(l);
672 }
673
a8c08ecd 674 }
6f9d8c32
NIS		 675}
676
39f7a870
JH		 677/* Return as an array the stack of layers on a filehandle. Note that
678 * the stack is returned top-first in the array, and there are three
679 * times as many array elements as there are layers in the stack: the
680 * first element of a layer triplet is the name, the second one is the
681 * arguments, and the third one is the flags. */
682
683AV *
684PerlIO_get_layers(pTHX_ PerlIO *f)
685{
dcda55fc 686 AV * const av = newAV();
39f7a870 687
dcda55fc
AL		 688 if (PerlIOValid(f)) {
689 PerlIOl *l = PerlIOBase(f);
690
691 while (l) {
92e45a3e
NC		 692 /* There is some collusion in the implementation of
693 XS_PerlIO_get_layers - it knows that name and flags are
694 generated as fresh SVs here, and takes advantage of that to
695 "copy" them by taking a reference. If it changes here, it needs
696 to change there too. */
dcda55fc
AL		 697 SV * const name = l->tab && l->tab->name ?
698 newSVpv(l->tab->name, 0) : &PL_sv_undef;
699 SV * const arg = l->tab && l->tab->Getarg ?
700 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
701 av_push(av, name);
702 av_push(av, arg);
703 av_push(av, newSViv((IV)l->flags));
704 l = l->next;
705 }
706 }
39f7a870 707
dcda55fc 708 return av;
39f7a870
JH		 709}
710
9e353e3b 711/*--------------------------------------------------------------------------------------*/
14a5cf38 712/*
71200d45 713 * XS Interface for perl code
14a5cf38 714 */
9e353e3b 715
fcf2db38 716PerlIO_funcs *
2edd7e44 717PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 718{
20b7effb 719
14a5cf38
JH		 720 IV i;
721 if ((SSize_t) len <= 0)
722 len = strlen(name);
3a1ee7e8 723 for (i = 0; i < PL_known_layers->cur; i++) {
46c461b5 724 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
ba90859e
NC		 725 const STRLEN this_len = strlen(f->name);
726 if (this_len == len && memEQ(f->name, name, len)) {
e17bc05a 727 DEBUG_i( PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f) );
14a5cf38
JH		 728 return f;
729 }
730 }
3a1ee7e8
NIS		 731 if (load && PL_subname && PL_def_layerlist
732 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR		 733 if (PL_in_load_module) {
734 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
735 return NULL;
736 } else {
396482e1 737 SV * const pkgsv = newSVpvs("PerlIO");
46c461b5 738 SV * const layer = newSVpvn(name, len);
b96d8cd9 739 CV * const cv = get_cvs("PerlIO::Layer::NoWarnings", 0);
46c461b5 740 ENTER;
4fa7c2bf 741 SAVEBOOL(PL_in_load_module);
c9bca74a 742 if (cv) {
9cfa90c0 743 SAVEGENERICSV(PL_warnhook);
ad64d0ec 744 PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
c9bca74a 745 }
4fa7c2bf 746 PL_in_load_module = TRUE;
d7a09b41
SR		 747 /*
748 * The two SVs are magically freed by load_module
749 */
a0714e2c 750 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
d7a09b41
SR		 751 LEAVE;
752 return PerlIO_find_layer(aTHX_ name, len, 0);
753 }
14a5cf38 754 }
e17bc05a 755 DEBUG_i( PerlIO_debug("Cannot find %.*s\n", (int) len, name) );
14a5cf38 756 return NULL;
f3862f8b
NIS		 757}
758
2a1bc955 759#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS		 760
761static int
762perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
763{
14a5cf38 764 if (SvROK(sv)) {
159b6efe 765 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
dcda55fc
AL		 766 PerlIO * const ifp = IoIFP(io);
767 PerlIO * const ofp = IoOFP(io);
be2597df
MHM		 768 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
769 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
14a5cf38
JH		 770 }
771 return 0;
b13b2135
NIS		 772}
773
774static int
775perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
776{
14a5cf38 777 if (SvROK(sv)) {
159b6efe 778 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
dcda55fc
AL		 779 PerlIO * const ifp = IoIFP(io);
780 PerlIO * const ofp = IoOFP(io);
be2597df
MHM		 781 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
782 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
14a5cf38
JH		 783 }
784 return 0;
b13b2135
NIS		 785}
786
787static int
788perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
789{
be2597df 790 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
14a5cf38 791 return 0;
b13b2135
NIS		 792}
793
794static int
795perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
796{
be2597df 797 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
14a5cf38 798 return 0;
b13b2135
NIS		 799}
800
801MGVTBL perlio_vtab = {
14a5cf38
JH		 802 perlio_mg_get,
803 perlio_mg_set,
22569500 804 NULL, /* len */
14a5cf38
JH		 805 perlio_mg_clear,
806 perlio_mg_free
b13b2135
NIS		 807};
808
15eb3045 809XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
b13b2135
NIS		 810XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
811{
14a5cf38 812 dXSARGS;
dcda55fc
AL		 813 SV * const sv = SvRV(ST(1));
814 AV * const av = newAV();
14a5cf38
JH		 815 MAGIC *mg;
816 int count = 0;
817 int i;
ad64d0ec 818 sv_magic(sv, MUTABLE_SV(av), PERL_MAGIC_ext, NULL, 0);
14a5cf38
JH		 819 SvRMAGICAL_off(sv);
820 mg = mg_find(sv, PERL_MAGIC_ext);
821 mg->mg_virtual = &perlio_vtab;
822 mg_magical(sv);
be2597df 823 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
14a5cf38
JH		 824 for (i = 2; i < items; i++) {
825 STRLEN len;
dcda55fc
AL		 826 const char * const name = SvPV_const(ST(i), len);
827 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
14a5cf38 828 if (layer) {
b37c2d43 829 av_push(av, SvREFCNT_inc_simple_NN(layer));
14a5cf38
JH		 830 }
831 else {
832 ST(count) = ST(i);
833 count++;
834 }
835 }
836 SvREFCNT_dec(av);
837 XSRETURN(count);
838}
839
b8fda935 840#endif /* USE_ATTRIBUTES_FOR_PERLIO */
2a1bc955 841
e3f3bf95
NIS		 842SV *
843PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 844{
da51bb9b 845 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
46c461b5 846 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
14a5cf38 847 return sv;
e3f3bf95
NIS		 848}
849
15eb3045 850XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
5ca1d77f 851XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 852{
486ec47a 853 /* This is used as a %SIG{__WARN__} handler to suppress warnings
c9bca74a
NIS		 854 during loading of layers.
855 */
856 dXSARGS;
5347602a 857 PERL_UNUSED_VAR(items);
e17bc05a
TC		 858 DEBUG_i(
859 if (items)
860 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0))) );
c9bca74a
NIS		 861 XSRETURN(0);
862}
863
15eb3045 864XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
5ca1d77f 865XS(XS_PerlIO__Layer__find)
0c4f7ff0 866{
14a5cf38
JH		 867 dXSARGS;
868 if (items < 2)
869 Perl_croak(aTHX_ "Usage class->find(name[,load])");
870 else {
de009b76 871 STRLEN len;
46c461b5 872 const char * const name = SvPV_const(ST(1), len);
f814d560 873 const bool load = (items > 2) ? SvTRUE_NN(ST(2)) : 0;
46c461b5 874 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
14a5cf38
JH		 875 ST(0) =
876 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
877 &PL_sv_undef;
878 XSRETURN(1);
879 }
0c4f7ff0
NIS		 880}
881
e3f3bf95
NIS		 882void
883PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
884{
3a1ee7e8
NIS		 885 if (!PL_known_layers)
886 PL_known_layers = PerlIO_list_alloc(aTHX);
a0714e2c 887 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
e17bc05a 888 DEBUG_i( PerlIO_debug("define %s %p\n", tab->name, (void*)tab) );
f3862f8b
NIS		 889}
890
1141d9f8 891int
fcf2db38 892PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 893{
14a5cf38
JH		 894 if (names) {
895 const char *s = names;
896 while (*s) {
897 while (isSPACE(*s) || *s == ':')
898 s++;
899 if (*s) {
900 STRLEN llen = 0;
901 const char *e = s;
bd61b366 902 const char *as = NULL;
14a5cf38
JH		 903 STRLEN alen = 0;
904 if (!isIDFIRST(*s)) {
905 /*
906 * Message is consistent with how attribute lists are
907 * passed. Even though this means "foo : : bar" is
71200d45 908 * seen as an invalid separator character.
14a5cf38 909 */
de009b76 910 const char q = ((*s == '\'') ? '"' : '\'');
a2a5de95
NC		 911 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
912 "Invalid separator character %c%c%c in PerlIO layer specification %s",
913 q, *s, q, s);
93189314 914 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 915 return -1;
916 }
917 do {
918 e++;
0eb30aeb 919 } while (isWORDCHAR(*e));
14a5cf38
JH		 920 llen = e - s;
921 if (*e == '(') {
922 int nesting = 1;
923 as = ++e;
924 while (nesting) {
925 switch (*e++) {
926 case ')':
927 if (--nesting == 0)
928 alen = (e - 1) - as;
929 break;
930 case '(':
931 ++nesting;
932 break;
933 case '\\':
934 /*
935 * It's a nul terminated string, not allowed
936 * to \ the terminating null. Anything other
71200d45 937 * character is passed over.
14a5cf38
JH		 938 */
939 if (*e++) {
940 break;
941 }
2165bd23 942 /* Fall through */
14a5cf38
JH		 943 case '\0':
944 e--;
a2a5de95
NC		 945 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
946 "Argument list not closed for PerlIO layer \"%.*s\"",
947 (int) (e - s), s);
14a5cf38
JH		 948 return -1;
949 default:
950 /*
71200d45 951 * boring.
14a5cf38
JH		 952 */
953 break;
954 }
955 }
956 }
957 if (e > s) {
46c461b5 958 PerlIO_funcs * const layer =
14a5cf38
JH		 959 PerlIO_find_layer(aTHX_ s, llen, 1);
960 if (layer) {
a951d81d
BL		 961 SV *arg = NULL;
962 if (as)
963 arg = newSVpvn(as, alen);
3a1ee7e8 964 PerlIO_list_push(aTHX_ av, layer,
a951d81d 965 (arg) ? arg : &PL_sv_undef);
ef8d46e8 966 SvREFCNT_dec(arg);
14a5cf38
JH		 967 }
968 else {
a2a5de95
NC		 969 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
970 (int) llen, s);
14a5cf38
JH		 971 return -1;
972 }
973 }
974 s = e;
975 }
976 }
977 }
978 return 0;
1141d9f8
NIS		 979}
980
dfebf958 981void
fcf2db38 982PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 983{
27da23d5 984 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 985#ifdef PERLIO_USING_CRLF
6ce75a77 986 tab = &PerlIO_crlf;
846be114 987#else
6ce75a77 988 if (PerlIO_stdio.Set_ptrcnt)
22569500 989 tab = &PerlIO_stdio;
846be114 990#endif
e17bc05a 991 DEBUG_i( PerlIO_debug("Pushing %s\n", tab->name) );
0987d6f3 992 PerlIO_list_push(aTHX_ av, (PerlIO_funcs *)tab, &PL_sv_undef);
dfebf958
NIS		 993}
994
e3f3bf95 995SV *
14a5cf38 996PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 997{
14a5cf38 998 return av->array[n].arg;
e3f3bf95
NIS		 999}
1000
f3862f8b 1001PerlIO_funcs *
14a5cf38 1002PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1003{
14a5cf38 1004 if (n >= 0 && n < av->cur) {
e17bc05a
TC		 1005 DEBUG_i( PerlIO_debug("Layer %" IVdf " is %s\n", n,
1006 av->array[n].funcs->name) );
14a5cf38
JH		 1007 return av->array[n].funcs;
1008 }
1009 if (!def)
1010 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1011 return def;
e3f3bf95
NIS		 1012}
1013
4ec2216f
NIS		 1014IV
1015PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1016{
8772537c
AL		 1017 PERL_UNUSED_ARG(mode);
1018 PERL_UNUSED_ARG(arg);
1019 PERL_UNUSED_ARG(tab);
4ec2216f
NIS		 1020 if (PerlIOValid(f)) {
1021 PerlIO_flush(f);
1022 PerlIO_pop(aTHX_ f);
1023 return 0;
1024 }
1025 return -1;
1026}
1027
27da23d5 1028PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS		 1029 sizeof(PerlIO_funcs),
1030 "pop",
1031 0,
1032 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1033 PerlIOPop_pushed,
1034 NULL,
c0888ace 1035 PerlIOBase_open,
4ec2216f
NIS		 1036 NULL,
1037 NULL,
1038 NULL,
1039 NULL,
1040 NULL,
1041 NULL,
1042 NULL,
1043 NULL,
de009b76
AL		 1044 NULL,
1045 NULL,
4ec2216f
NIS		 1046 NULL, /* flush */
1047 NULL, /* fill */
1048 NULL,
1049 NULL,
1050 NULL,
1051 NULL,
1052 NULL, /* get_base */
1053 NULL, /* get_bufsiz */
1054 NULL, /* get_ptr */
1055 NULL, /* get_cnt */
1056 NULL, /* set_ptrcnt */
1057};
1058
fcf2db38 1059PerlIO_list_t *
e3f3bf95
NIS		 1060PerlIO_default_layers(pTHX)
1061{
3a1ee7e8 1062 if (!PL_def_layerlist) {
284167a5 1063 const char * const s = TAINTING_get ? NULL : PerlEnv_getenv("PERLIO");
27da23d5 1064 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1065 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1066 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1067#if defined(WIN32)
27da23d5 1068 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1069#if 0
14a5cf38 1070 osLayer = &PerlIO_win32;
0c4128ad 1071#endif
2f8118af 1072#endif
27da23d5
JH		 1073 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1074 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1075 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1076 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
27da23d5
JH		 1077 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1078 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1079 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
0987d6f3
TC		 1080 PerlIO_list_push(aTHX_ PL_def_layerlist, (PerlIO_funcs *)osLayer,
1081 &PL_sv_undef);
14a5cf38 1082 if (s) {
3a1ee7e8 1083 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH		 1084 }
1085 else {
3a1ee7e8 1086 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1087 }
1141d9f8 1088 }
3a1ee7e8
NIS		 1089 if (PL_def_layerlist->cur < 2) {
1090 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1091 }
3a1ee7e8 1092 return PL_def_layerlist;
e3f3bf95
NIS		 1093}
1094
0c4f7ff0
NIS		 1095void
1096Perl_boot_core_PerlIO(pTHX)
1097{
1098#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH		 1099 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1100 __FILE__);
0c4f7ff0 1101#endif
14a5cf38 1102 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1103 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1104}
e3f3bf95
NIS		 1105
1106PerlIO_funcs *
1107PerlIO_default_layer(pTHX_ I32 n)
1108{
46c461b5 1109 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
14a5cf38
JH		 1110 if (n < 0)
1111 n += av->cur;
27da23d5 1112 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS		 1113}
1114
a999f61b
NIS		 1115#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1116#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS		 1117
1118void
1141d9f8 1119PerlIO_stdstreams(pTHX)
60382766 1120{
a1ea730d 1121 if (!PL_perlio) {
8995e67d 1122 PerlIO_init_table(aTHX);
14a5cf38
JH		 1123 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1124 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1125 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1126 }
60382766
NIS		 1127}
1128
1129PerlIO *
27da23d5 1130PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1131{
16865ff7 1132 VERIFY_HEAD(f);
2dc2558e 1133 if (tab->fsize != sizeof(PerlIO_funcs)) {
0dc17498 1134 Perl_croak( aTHX_
147e3846 1135 "%s (%" UVuf ") does not match %s (%" UVuf ")",
5cf96513
RB		 1136 "PerlIO layer function table size", (UV)tab->fsize,
1137 "size expected by this perl", (UV)sizeof(PerlIO_funcs) );
2dc2558e
NIS		 1138 }
1139 if (tab->size) {
b464bac0 1140 PerlIOl *l;
2dc2558e 1141 if (tab->size < sizeof(PerlIOl)) {
0dc17498 1142 Perl_croak( aTHX_
147e3846 1143 "%s (%" UVuf ") smaller than %s (%" UVuf ")",
5cf96513
RB		 1144 "PerlIO layer instance size", (UV)tab->size,
1145 "size expected by this perl", (UV)sizeof(PerlIOl) );
2dc2558e
NIS		 1146 }
1147 /* Real layer with a data area */
002e75cf
JH		 1148 if (f) {
1149 char *temp;
1150 Newxz(temp, tab->size, char);
1151 l = (PerlIOl*)temp;
1152 if (l) {
1153 l->next = *f;
1154 l->tab = (PerlIO_funcs*) tab;
16865ff7 1155 l->head = ((PerlIOl*)f)->head;
002e75cf 1156 *f = l;
e17bc05a
TC		 1157 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1158 (void*)f, tab->name,
1159 (mode) ? mode : "(Null)", (void*)arg) );
002e75cf
JH		 1160 if (*l->tab->Pushed &&
1161 (*l->tab->Pushed)
1162 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1163 PerlIO_pop(aTHX_ f);
1164 return NULL;
1165 }
2dc2558e 1166 }
002e75cf
JH		 1167 else
1168 return NULL;
2dc2558e
NIS		 1169 }
1170 }
1171 else if (f) {
1172 /* Pseudo-layer where push does its own stack adjust */
e17bc05a
TC		 1173 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1174 (mode) ? mode : "(Null)", (void*)arg) );
210e727c 1175 if (tab->Pushed &&
27da23d5 1176 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1177 return NULL;
14a5cf38
JH		 1178 }
1179 }
1180 return f;
60382766
NIS		 1181}
1182
81fe74fb
LT		 1183PerlIO *
1184PerlIOBase_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1185 IV n, const char *mode, int fd, int imode, int perm,
1186 PerlIO *old, int narg, SV **args)
1187{
1188 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_layer(aTHX_ 0));
1189 if (tab && tab->Open) {
1190 PerlIO* ret = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm, old, narg, args);
6d5bdea2 1191 if (ret && PerlIO_push(aTHX_ ret, self, mode, PerlIOArg) == NULL) {
81fe74fb
LT		 1192 PerlIO_close(ret);
1193 return NULL;
1194 }
1195 return ret;
1196 }
1197 SETERRNO(EINVAL, LIB_INVARG);
1198 return NULL;
1199}
1200
dfebf958 1201IV
86e05cf2
NIS		 1202PerlIOBase_binmode(pTHX_ PerlIO *f)
1203{
1204 if (PerlIOValid(f)) {
1205 /* Is layer suitable for raw stream ? */
cc6623a8 1206 if (PerlIOBase(f)->tab && PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
86e05cf2
NIS		 1207 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1208 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1209 }
1210 else {
1211 /* Not suitable - pop it */
1212 PerlIO_pop(aTHX_ f);
1213 }
1214 return 0;
1215 }
1216 return -1;
1217}
1218
1219IV
2dc2558e 1220PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1221{
8772537c
AL		 1222 PERL_UNUSED_ARG(mode);
1223 PERL_UNUSED_ARG(arg);
1224 PERL_UNUSED_ARG(tab);
86e05cf2 1225
04892f78 1226 if (PerlIOValid(f)) {
86e05cf2 1227 PerlIO *t;
de009b76 1228 const PerlIOl *l;
14a5cf38 1229 PerlIO_flush(f);
86e05cf2
NIS		 1230 /*
1231 * Strip all layers that are not suitable for a raw stream
1232 */
1233 t = f;
1234 while (t && (l = *t)) {
cc6623a8 1235 if (l->tab && l->tab->Binmode) {
86e05cf2 1236 /* Has a handler - normal case */
9d97e8b8 1237 if ((*l->tab->Binmode)(aTHX_ t) == 0) {
86e05cf2
NIS		 1238 if (*t == l) {
1239 /* Layer still there - move down a layer */
1240 t = PerlIONext(t);
1241 }
1242 }
1243 else {
1244 return -1;
1245 }
14a5cf38
JH		 1246 }
1247 else {
86e05cf2
NIS		 1248 /* No handler - pop it */
1249 PerlIO_pop(aTHX_ t);
14a5cf38
JH		 1250 }
1251 }
86e05cf2 1252 if (PerlIOValid(f)) {
e17bc05a
TC		 1253 DEBUG_i( PerlIO_debug(":raw f=%p :%s\n", (void*)f,
1254 PerlIOBase(f)->tab ? PerlIOBase(f)->tab->name : "(Null)") );
86e05cf2
NIS		 1255 return 0;
1256 }
14a5cf38
JH		 1257 }
1258 return -1;
dfebf958
NIS		 1259}
1260
ac27b0f5 1261int
14a5cf38 1262PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1263 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1264{
14a5cf38
JH		 1265 int code = 0;
1266 while (n < max) {
8772537c 1267 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
14a5cf38
JH		 1268 if (tab) {
1269 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1270 code = -1;
1271 break;
1272 }
1273 }
1274 n++;
1275 }
1276 return code;
e3f3bf95
NIS		 1277}
1278
1279int
ac27b0f5
NIS		 1280PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1281{
14a5cf38 1282 int code = 0;
da0fccaa
DG		 1283 ENTER;
1284 save_scalar(PL_errgv);
53f1b6d2 1285 if (f && names) {
8772537c 1286 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH		 1287 code = PerlIO_parse_layers(aTHX_ layers, names);
1288 if (code == 0) {
d9dac8cd 1289 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1290 }
3a1ee7e8 1291 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1292 }
da0fccaa 1293 LEAVE;
14a5cf38 1294 return code;
ac27b0f5
NIS		 1295}
1296
f3862f8b 1297
60382766 1298/*--------------------------------------------------------------------------------------*/
14a5cf38 1299/*
71200d45 1300 * Given the abstraction above the public API functions
14a5cf38 1301 */
60382766
NIS		 1302
1303int
f5b9d040 1304PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1305{
5347602a
DM		 1306 PERL_UNUSED_ARG(iotype);
1307 PERL_UNUSED_ARG(mode);
1308
e17bc05a
TC		 1309 DEBUG_i(
1310 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1311 (PerlIOBase(f) && PerlIOBase(f)->tab) ?
1312 PerlIOBase(f)->tab->name : "(Null)",
1313 iotype, mode, (names) ? names : "(Null)") );
68b5363f 1314
03c0554d
NIS		 1315 if (names) {
1316 /* Do not flush etc. if (e.g.) switching encodings.
1317 if a pushed layer knows it needs to flush lower layers
1318 (for example :unix which is never going to call them)
1319 it can do the flush when it is pushed.
1320 */
8298454c 1321 return cBOOL(PerlIO_apply_layers(aTHX_ f, NULL, names) == 0);
03c0554d
NIS		 1322 }
1323 else {
86e05cf2 1324 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1325#ifdef PERLIO_USING_CRLF
03c0554d
NIS		 1326 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1327 O_BINARY so we can look for it in mode.
1328 */
1329 if (!(mode & O_BINARY)) {
1330 /* Text mode */
86e05cf2
NIS		 1331 /* FIXME?: Looking down the layer stack seems wrong,
1332 but is a way of reaching past (say) an encoding layer
1333 to flip CRLF-ness of the layer(s) below
1334 */
03c0554d
NIS		 1335 while (*f) {
1336 /* Perhaps we should turn on bottom-most aware layer
1337 e.g. Ilya's idea that UNIX TTY could serve
1338 */
cc6623a8
DM		 1339 if (PerlIOBase(f)->tab &&
1340 PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF)
1341 {
03c0554d
NIS		 1342 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1343 /* Not in text mode - flush any pending stuff and flip it */
1344 PerlIO_flush(f);
1345 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1346 }
1347 /* Only need to turn it on in one layer so we are done */
1348 return TRUE;
ed53a2bb 1349 }
03c0554d 1350 f = PerlIONext(f);
14a5cf38 1351 }
03c0554d
NIS		 1352 /* Not finding a CRLF aware layer presumably means we are binary
1353 which is not what was requested - so we failed
1354 We _could_ push :crlf layer but so could caller
1355 */
1356 return FALSE;
14a5cf38 1357 }
6ce75a77 1358#endif
86e05cf2
NIS		 1359 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1360 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1361 */
8298454c 1362 return cBOOL(PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL));
14a5cf38 1363 }
f5b9d040
NIS		 1364}
1365
f5b9d040 1366int
e87a358a 1367PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1368{
37725cdc 1369 if (PerlIOValid(f)) {
46c461b5 1370 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
37725cdc
NIS		 1371 if (tab && tab->Close)
1372 return (*tab->Close)(aTHX_ f);
1373 else
1374 return PerlIOBase_close(aTHX_ f);
1375 }
14a5cf38 1376 else {
93189314 1377 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1378 return -1;
1379 }
76ced9ad
NIS		 1380}
1381
b931b1d9 1382int
e87a358a 1383Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1384{
de009b76 1385 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS		 1386 while (PerlIOValid(f)) {
1387 PerlIO_pop(aTHX_ f);
abf9167d
DM		 1388 if (PerlIO_lockcnt(f))
1389 /* we're in use; the 'pop' deferred freeing the structure */
1390 f = PerlIONext(f);
f6c77cf1 1391 }
14a5cf38 1392 return code;
b931b1d9
NIS		 1393}
1394
b931b1d9 1395int
e87a358a 1396Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1397{
20b7effb 1398 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS		 1399}
1400
1141d9f8 1401
fcf2db38 1402static PerlIO_funcs *
2edd7e44
NIS		 1403PerlIO_layer_from_ref(pTHX_ SV *sv)
1404{
14a5cf38 1405 /*
71200d45 1406 * For any scalar type load the handler which is bundled with perl
14a5cf38 1407 */
526fd1b4 1408 if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
75208dda
RGS		 1409 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1410 /* This isn't supposed to happen, since PerlIO::scalar is core,
1411 * but could happen anyway in smaller installs or with PAR */
a2a5de95 1412 if (!f)
dcbac5bb 1413 /* diag_listed_as: Unknown PerlIO layer "%s" */
a2a5de95 1414 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
75208dda
RGS		 1415 return f;
1416 }
14a5cf38
JH		 1417
1418 /*
71200d45 1419 * For other types allow if layer is known but don't try and load it
14a5cf38
JH		 1420 */
1421 switch (SvTYPE(sv)) {
1422 case SVt_PVAV:
6a245ed1 1423 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
14a5cf38 1424 case SVt_PVHV:
6a245ed1 1425 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
14a5cf38 1426 case SVt_PVCV:
6a245ed1 1427 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
14a5cf38 1428 case SVt_PVGV:
6a245ed1 1429 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
42d0e0b7
AL		 1430 default:
1431 return NULL;
14a5cf38 1432 }
2edd7e44
NIS		 1433}
1434
fcf2db38 1435PerlIO_list_t *
14a5cf38
JH		 1436PerlIO_resolve_layers(pTHX_ const char *layers,
1437 const char *mode, int narg, SV **args)
1438{
1439 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1440 int incdef = 1;
a1ea730d 1441 if (!PL_perlio)
14a5cf38
JH		 1442 PerlIO_stdstreams(aTHX);
1443 if (narg) {
dcda55fc 1444 SV * const arg = *args;
14a5cf38 1445 /*
71200d45
NIS		 1446 * If it is a reference but not an object see if we have a handler
1447 * for it
14a5cf38 1448 */
4e0ef342 1449 if (SvROK(arg) && !SvOBJECT(SvRV(arg))) {
46c461b5 1450 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
14a5cf38 1451 if (handler) {
3a1ee7e8
NIS		 1452 def = PerlIO_list_alloc(aTHX);
1453 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH		 1454 incdef = 0;
1455 }
1456 /*
e934609f 1457 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1458 * something sensible else we will just stringfy and open
71200d45 1459 * resulting string.
14a5cf38
JH		 1460 */
1461 }
1462 }
9fe371da 1463 if (!layers || !*layers)
11bcd5da 1464 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH		 1465 if (layers && *layers) {
1466 PerlIO_list_t *av;
1467 if (incdef) {
a951d81d 1468 av = PerlIO_clone_list(aTHX_ def, NULL);
14a5cf38
JH		 1469 }
1470 else {
1471 av = def;
1472 }
0cff2cf3
NIS		 1473 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1474 return av;
1475 }
1476 else {
1477 PerlIO_list_free(aTHX_ av);
b37c2d43 1478 return NULL;
0cff2cf3 1479 }
14a5cf38
JH		 1480 }
1481 else {
1482 if (incdef)
1483 def->refcnt++;
1484 return def;
1485 }
ee518936
NIS		 1486}
1487
1488PerlIO *
14a5cf38
JH		 1489PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1490 int imode, int perm, PerlIO *f, int narg, SV **args)
1491{
1492 if (!f && narg == 1 && *args == &PL_sv_undef) {
16bac4a4 1493 imode = PerlIOUnix_oflags(mode);
ae73d7ec
TC		 1494
1495 if (imode != -1 && (f = PerlIO_tmpfile_flags(imode))) {
9fe371da 1496 if (!layers || !*layers)
11bcd5da 1497 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH		 1498 if (layers && *layers)
1499 PerlIO_apply_layers(aTHX_ f, mode, layers);
1500 }
1501 }
1502 else {
de009b76 1503 PerlIO_list_t *layera;
14a5cf38
JH		 1504 IV n;
1505 PerlIO_funcs *tab = NULL;
04892f78 1506 if (PerlIOValid(f)) {
14a5cf38 1507 /*
71200d45
NIS		 1508 * This is "reopen" - it is not tested as perl does not use it
1509 * yet
14a5cf38
JH		 1510 */
1511 PerlIOl *l = *f;
3a1ee7e8 1512 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1513 while (l) {
a951d81d 1514 SV *arg = NULL;
cc6623a8 1515 if (l->tab && l->tab->Getarg)
a951d81d
BL		 1516 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1517 PerlIO_list_push(aTHX_ layera, l->tab,
1518 (arg) ? arg : &PL_sv_undef);
ef8d46e8 1519 SvREFCNT_dec(arg);
14a5cf38
JH		 1520 l = *PerlIONext(&l);
1521 }
1522 }
1523 else {
1524 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS		 1525 if (!layera) {
1526 return NULL;
1527 }
14a5cf38
JH		 1528 }
1529 /*
71200d45 1530 * Start at "top" of layer stack
14a5cf38
JH		 1531 */
1532 n = layera->cur - 1;
1533 while (n >= 0) {
46c461b5 1534 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
14a5cf38
JH		 1535 if (t && t->Open) {
1536 tab = t;
1537 break;
1538 }
1539 n--;
1540 }
1541 if (tab) {
1542 /*
71200d45 1543 * Found that layer 'n' can do opens - call it
14a5cf38 1544 */
7cf31beb 1545 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1546 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1547 }
e17bc05a
TC		 1548 DEBUG_i( PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1549 tab->name, layers ? layers : "(Null)", mode, fd,
1550 imode, perm, (void*)f, narg, (void*)args) );
210e727c
JH		 1551 if (tab->Open)
1552 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1553 f, narg, args);
1554 else {
1555 SETERRNO(EINVAL, LIB_INVARG);
1556 f = NULL;
1557 }
14a5cf38
JH		 1558 if (f) {
1559 if (n + 1 < layera->cur) {
1560 /*
1561 * More layers above the one that we used to open -
71200d45 1562 * apply them now
14a5cf38 1563 */
d9dac8cd
NIS		 1564 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1565 /* If pushing layers fails close the file */
1566 PerlIO_close(f);
14a5cf38
JH		 1567 f = NULL;
1568 }
1569 }
1570 }
1571 }
3a1ee7e8 1572 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH		 1573 }
1574 return f;
ee518936 1575}
b931b1d9
NIS		 1576
1577
9e353e3b 1578SSize_t
e87a358a 1579Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1580{
7918f24d
NC		 1581 PERL_ARGS_ASSERT_PERLIO_READ;
1582
b32dd47e 1583 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW		 1584}
1585
313ca112 1586SSize_t
e87a358a 1587Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1588{
7918f24d
NC		 1589 PERL_ARGS_ASSERT_PERLIO_UNREAD;
1590
b32dd47e 1591 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW		 1592}
1593
9e353e3b 1594SSize_t
e87a358a 1595Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1596{
7918f24d
NC		 1597 PERL_ARGS_ASSERT_PERLIO_WRITE;
1598
b32dd47e 1599 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW		 1600}
1601
6f9d8c32 1602int
e87a358a 1603Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1604{
b32dd47e 1605 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW		 1606}
1607
9e353e3b 1608Off_t
e87a358a 1609Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1610{
b32dd47e 1611 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW		 1612}
1613
6f9d8c32 1614int
e87a358a 1615Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1616{
14a5cf38
JH		 1617 if (f) {
1618 if (*f) {
de009b76 1619 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH		 1620
1621 if (tab && tab->Flush)
f62ce20a 1622 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH		 1623 else
1624 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH		 1625 }
1626 else {
e17bc05a 1627 DEBUG_i( PerlIO_debug("Cannot flush f=%p\n", (void*)f) );
93189314 1628 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH		 1629 return -1;
1630 }
1631 }
1632 else {
1633 /*
1634 * Is it good API design to do flush-all on NULL, a potentially
486ec47a 1635 * erroneous input? Maybe some magical value (PerlIO*
14a5cf38
JH		 1636 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1637 * things on fflush(NULL), but should we be bound by their design
71200d45 1638 * decisions? --jhi
14a5cf38 1639 */
303f2dc3
DM		 1640 PerlIOl **table = &PL_perlio;
1641 PerlIOl *ff;
14a5cf38 1642 int code = 0;
303f2dc3 1643 while ((ff = *table)) {
14a5cf38 1644 int i;
303f2dc3 1645 table = (PerlIOl **) (ff++);
14a5cf38 1646 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
303f2dc3 1647 if (ff->next && PerlIO_flush(&(ff->next)) != 0)
14a5cf38 1648 code = -1;
303f2dc3 1649 ff++;
14a5cf38
JH		 1650 }
1651 }
1652 return code;
1653 }
760ac839
LW		 1654}
1655
a9c883f6 1656void
f62ce20a 1657PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1658{
303f2dc3
DM		 1659 PerlIOl **table = &PL_perlio;
1660 PerlIOl *f;
14a5cf38
JH		 1661 while ((f = *table)) {
1662 int i;
303f2dc3 1663 table = (PerlIOl **) (f++);
14a5cf38 1664 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
303f2dc3
DM		 1665 if (f->next
1666 && (PerlIOBase(&(f->next))->
14a5cf38
JH		 1667 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1668 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
303f2dc3 1669 PerlIO_flush(&(f->next));
14a5cf38
JH		 1670 f++;
1671 }
a9c883f6 1672 }
a9c883f6
NIS		 1673}
1674
06da4f11 1675int
e87a358a 1676Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1677{
b32dd47e 1678 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS		 1679}
1680
f3862f8b
NIS		 1681int
1682PerlIO_isutf8(PerlIO *f)
1683{
1b7a0411
JH		 1684 if (PerlIOValid(f))
1685 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1686 else
1687 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1688
1b7a0411 1689 return -1;
f3862f8b
NIS		 1690}
1691
6f9d8c32 1692int
e87a358a 1693Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1694{
b32dd47e 1695 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS		 1696}
1697
9e353e3b 1698int
e87a358a 1699Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1700{
b32dd47e 1701 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS		 1702}
1703
9e353e3b 1704void
e87a358a 1705Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1706{
b32dd47e 1707 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS		 1708}
1709
9e353e3b 1710void
e87a358a 1711Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1712{
b32dd47e 1713 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS		 1714}
1715
9e353e3b
NIS		 1716int
1717PerlIO_has_base(PerlIO *f)
1718{
1b7a0411 1719 if (PerlIOValid(f)) {
46c461b5 1720 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH		 1721
1722 if (tab)
1723 return (tab->Get_base != NULL);
1b7a0411 1724 }
1b7a0411
JH		 1725
1726 return 0;
760ac839
LW		 1727}
1728
9e353e3b
NIS		 1729int
1730PerlIO_fast_gets(PerlIO *f)
760ac839 1731{
d7dfc388
SK		 1732 if (PerlIOValid(f)) {
1733 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
1734 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411 1735
d7dfc388
SK		 1736 if (tab)
1737 return (tab->Set_ptrcnt != NULL);
d7dfc388 1738 }
14a5cf38 1739 }
1b7a0411 1740
14a5cf38 1741 return 0;
9e353e3b
NIS		 1742}
1743
9e353e3b
NIS		 1744int
1745PerlIO_has_cntptr(PerlIO *f)
1746{
04892f78 1747 if (PerlIOValid(f)) {
46c461b5 1748 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH		 1749
1750 if (tab)
1751 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
14a5cf38 1752 }
1b7a0411 1753
14a5cf38 1754 return 0;
9e353e3b
NIS		 1755}
1756
9e353e3b
NIS		 1757int
1758PerlIO_canset_cnt(PerlIO *f)
1759{
04892f78 1760 if (PerlIOValid(f)) {
46c461b5 1761 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH		 1762
1763 if (tab)
1764 return (tab->Set_ptrcnt != NULL);
14a5cf38 1765 }
1b7a0411 1766
14a5cf38 1767 return 0;
760ac839
LW		 1768}
1769
888911fc 1770STDCHAR *
e87a358a 1771Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1772{
b32dd47e 1773 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS		 1774}
1775
b66f3475 1776SSize_t
e87a358a 1777Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1778{
b66f3475 1779 /* Note that Get_bufsiz returns a Size_t */
b32dd47e 1780 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS		 1781}
1782
9e353e3b 1783STDCHAR *
e87a358a 1784Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1785{
b32dd47e 1786 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS		 1787}
1788
b66f3475 1789SSize_t
e87a358a 1790Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1791{
b32dd47e 1792 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS		 1793}
1794
9e353e3b 1795void
b66f3475 1796Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, SSize_t cnt)
9e353e3b 1797{
b32dd47e 1798 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS		 1799}
1800
9e353e3b 1801void
b66f3475 1802Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 1803{
b32dd47e 1804 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS		 1805}
1806
4ec2216f 1807
9e353e3b 1808/*--------------------------------------------------------------------------------------*/
14a5cf38 1809/*
71200d45 1810 * utf8 and raw dummy layers
14a5cf38 1811 */
dfebf958 1812
26fb694e 1813IV
2dc2558e 1814PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1815{
96a5add6 1816 PERL_UNUSED_CONTEXT;
8772537c
AL		 1817 PERL_UNUSED_ARG(mode);
1818 PERL_UNUSED_ARG(arg);
00f51856 1819 if (PerlIOValid(f)) {
cc6623a8 1820 if (tab && tab->kind & PERLIO_K_UTF8)
14a5cf38
JH		 1821 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1822 else
1823 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1824 return 0;
1825 }
1826 return -1;
26fb694e
NIS		 1827}
1828
27da23d5 1829PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1830 sizeof(PerlIO_funcs),
14a5cf38 1831 "utf8",
2dc2558e 1832 0,
a778d1f5 1833 PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
14a5cf38
JH		 1834 PerlIOUtf8_pushed,
1835 NULL,
c0888ace 1836 PerlIOBase_open,
14a5cf38
JH		 1837 NULL,
1838 NULL,
1839 NULL,
1840 NULL,
1841 NULL,
1842 NULL,
1843 NULL,
1844 NULL,
de009b76
AL		 1845 NULL,
1846 NULL,
22569500
NIS		 1847 NULL, /* flush */
1848 NULL, /* fill */
14a5cf38
JH		 1849 NULL,
1850 NULL,
1851 NULL,
1852 NULL,
22569500
NIS		 1853 NULL, /* get_base */
1854 NULL, /* get_bufsiz */
1855 NULL, /* get_ptr */
1856 NULL, /* get_cnt */
1857 NULL, /* set_ptrcnt */
26fb694e
NIS		 1858};
1859
27da23d5 1860PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1861 sizeof(PerlIO_funcs),
14a5cf38 1862 "bytes",
2dc2558e 1863 0,
a778d1f5 1864 PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
14a5cf38
JH		 1865 PerlIOUtf8_pushed,
1866 NULL,
c0888ace 1867 PerlIOBase_open,
14a5cf38
JH		 1868 NULL,
1869 NULL,
1870 NULL,
1871 NULL,
1872 NULL,
1873 NULL,
1874 NULL,
1875 NULL,
de009b76
AL		 1876 NULL,
1877 NULL,
22569500
NIS		 1878 NULL, /* flush */
1879 NULL, /* fill */
14a5cf38
JH		 1880 NULL,
1881 NULL,
1882 NULL,
1883 NULL,
22569500
NIS		 1884 NULL, /* get_base */
1885 NULL, /* get_bufsiz */
1886 NULL, /* get_ptr */
1887 NULL, /* get_cnt */
1888 NULL, /* set_ptrcnt */
dfebf958
NIS		 1889};
1890
27da23d5 1891PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1892 sizeof(PerlIO_funcs),
14a5cf38 1893 "raw",
2dc2558e 1894 0,
14a5cf38
JH		 1895 PERLIO_K_DUMMY,
1896 PerlIORaw_pushed,
1897 PerlIOBase_popped,
ecfd0649 1898 PerlIOBase_open,
14a5cf38
JH		 1899 NULL,
1900 NULL,
1901 NULL,
1902 NULL,
1903 NULL,
1904 NULL,
1905 NULL,
1906 NULL,
de009b76
AL		 1907 NULL,
1908 NULL,
22569500
NIS		 1909 NULL, /* flush */
1910 NULL, /* fill */
14a5cf38
JH		 1911 NULL,
1912 NULL,
1913 NULL,
1914 NULL,
22569500
NIS		 1915 NULL, /* get_base */
1916 NULL, /* get_bufsiz */
1917 NULL, /* get_ptr */
1918 NULL, /* get_cnt */
1919 NULL, /* set_ptrcnt */
dfebf958
NIS		 1920};
1921/*--------------------------------------------------------------------------------------*/
1922/*--------------------------------------------------------------------------------------*/
14a5cf38 1923/*
71200d45 1924 * "Methods" of the "base class"
14a5cf38 1925 */
9e353e3b
NIS		 1926
1927IV
f62ce20a 1928PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1929{
04892f78 1930 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS		 1931}
1932
f5b9d040 1933char *
81428673 1934PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH		 1935{
1936 char *s = buf;
81428673 1937 if (PerlIOValid(f)) {
de009b76 1938 const IV flags = PerlIOBase(f)->flags;
81428673
NIS		 1939 if (flags & PERLIO_F_APPEND) {
1940 *s++ = 'a';
1941 if (flags & PERLIO_F_CANREAD) {
1942 *s++ = '+';
1943 }
14a5cf38 1944 }
81428673
NIS		 1945 else if (flags & PERLIO_F_CANREAD) {
1946 *s++ = 'r';
1947 if (flags & PERLIO_F_CANWRITE)
1948 *s++ = '+';
1949 }
1950 else if (flags & PERLIO_F_CANWRITE) {
1951 *s++ = 'w';
1952 if (flags & PERLIO_F_CANREAD) {
1953 *s++ = '+';
1954 }
14a5cf38 1955 }
35990314 1956#ifdef PERLIO_USING_CRLF
81428673
NIS		 1957 if (!(flags & PERLIO_F_CRLF))
1958 *s++ = 'b';
5f1a76d0 1959#endif
81428673 1960 }
14a5cf38
JH		 1961 *s = '\0';
1962 return buf;
f5b9d040
NIS		 1963}
1964
81428673 1965
76ced9ad 1966IV
2dc2558e 1967PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 1968{
de009b76 1969 PerlIOl * const l = PerlIOBase(f);
96a5add6 1970 PERL_UNUSED_CONTEXT;
8772537c 1971 PERL_UNUSED_ARG(arg);
de009b76 1972
14a5cf38
JH		 1973 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1974 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
cc6623a8 1975 if (tab && tab->Set_ptrcnt != NULL)
14a5cf38
JH		 1976 l->flags |= PERLIO_F_FASTGETS;
1977 if (mode) {
3b6c1aba 1978 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH		 1979 mode++;
1980 switch (*mode++) {
1981 case 'r':
1982 l->flags |= PERLIO_F_CANREAD;
1983 break;
1984 case 'a':
1985 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1986 break;
1987 case 'w':
1988 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1989 break;
1990 default:
93189314 1991 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 1992 return -1;
1993 }
49fc4906
YK		 1994#ifdef EBCDIC
1995 {
1996 /* The mode variable contains one positional parameter followed by
1997 * optional keyword parameters. The positional parameters must be
1998 * passed as lowercase characters. The keyword parameters can be
1999 * passed in mixed case. They must be separated by commas. Only one
2000 * instance of a keyword can be specified. */
2001 int comma = 0;
2002 while (*mode) {
2003 switch (*mode++) {
2004 case '+':
2005 if(!comma)
2006 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2007 break;
2008 case 'b':
2009 if(!comma)
2010 l->flags &= ~PERLIO_F_CRLF;
2011 break;
2012 case 't':
2013 if(!comma)
2014 l->flags |= PERLIO_F_CRLF;
2015 break;
2016 case ',':
2017 comma = 1;
2018 break;
2019 default:
2020 break;
2021 }
2022 }
2023 }
2024#else
14a5cf38
JH		 2025 while (*mode) {
2026 switch (*mode++) {
2027 case '+':
2028 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2029 break;
2030 case 'b':
2031 l->flags &= ~PERLIO_F_CRLF;
2032 break;
2033 case 't':
2034 l->flags |= PERLIO_F_CRLF;
2035 break;
2036 default:
93189314 2037 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 2038 return -1;
2039 }
2040 }
49fc4906 2041#endif
14a5cf38
JH		 2042 }
2043 else {
2044 if (l->next) {
2045 l->flags |= l->next->flags &
2046 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2047 PERLIO_F_APPEND);
2048 }
2049 }
5e2ab84b 2050#if 0
e17bc05a 2051 DEBUG_i(
14a5cf38 2052 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
6c9570dc 2053 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
14a5cf38 2054 l->flags, PerlIO_modestr(f, temp));
e17bc05a 2055 );
5e2ab84b 2056#endif
14a5cf38 2057 return 0;
76ced9ad
NIS		 2058}
2059
2060IV
f62ce20a 2061PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2062{
96a5add6 2063 PERL_UNUSED_CONTEXT;
8772537c 2064 PERL_UNUSED_ARG(f);
14a5cf38 2065 return 0;
760ac839
LW		 2066}
2067
9e353e3b 2068SSize_t
f62ce20a 2069PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2070{
14a5cf38 2071 /*
71200d45 2072 * Save the position as current head considers it
14a5cf38 2073 */
de009b76 2074 const Off_t old = PerlIO_tell(f);
a0714e2c 2075 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
14a5cf38 2076 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2077 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS		 2078}
2079
f6c77cf1 2080SSize_t
f62ce20a 2081PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2082{
14a5cf38
JH		 2083 STDCHAR *buf = (STDCHAR *) vbuf;
2084 if (f) {
263df5f1
JH		 2085 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2086 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2087 SETERRNO(EBADF, SS_IVCHAN);
0ea86a10 2088 PerlIO_save_errno(f);
263df5f1
JH		 2089 return 0;
2090 }
14a5cf38 2091 while (count > 0) {
93c2c2ec
IZ		 2092 get_cnt:
2093 {
14a5cf38
JH		 2094 SSize_t avail = PerlIO_get_cnt(f);
2095 SSize_t take = 0;
2096 if (avail > 0)
94e529cc 2097 take = (((SSize_t) count >= 0) && ((SSize_t)count < avail)) ? (SSize_t)count : avail;
14a5cf38
JH		 2098 if (take > 0) {
2099 STDCHAR *ptr = PerlIO_get_ptr(f);
2100 Copy(ptr, buf, take, STDCHAR);
2101 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2102 count -= take;
2103 buf += take;
93c2c2ec
IZ		 2104 if (avail == 0) /* set_ptrcnt could have reset avail */
2105 goto get_cnt;
14a5cf38
JH		 2106 }
2107 if (count > 0 && avail <= 0) {
2108 if (PerlIO_fill(f) != 0)
2109 break;
2110 }
93c2c2ec 2111 }
14a5cf38
JH		 2112 }
2113 return (buf - (STDCHAR *) vbuf);
2114 }
f6c77cf1 2115 return 0;
f6c77cf1
NIS		 2116}
2117
9e353e3b 2118IV
f62ce20a 2119PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2120{
96a5add6 2121 PERL_UNUSED_CONTEXT;
8772537c 2122 PERL_UNUSED_ARG(f);
14a5cf38 2123 return 0;
9e353e3b
NIS		 2124}
2125
2126IV
f62ce20a 2127PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2128{
96a5add6 2129 PERL_UNUSED_CONTEXT;
8772537c 2130 PERL_UNUSED_ARG(f);
14a5cf38 2131 return -1;
06da4f11
NIS		 2132}
2133
2134IV
f62ce20a 2135PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2136{
37725cdc
NIS		 2137 IV code = -1;
2138 if (PerlIOValid(f)) {
2139 PerlIO *n = PerlIONext(f);
2140 code = PerlIO_flush(f);
2141 PerlIOBase(f)->flags &=
2142 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2143 while (PerlIOValid(n)) {
de009b76 2144 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS		 2145 if (tab && tab->Close) {
2146 if ((*tab->Close)(aTHX_ n) != 0)
2147 code = -1;
2148 break;
2149 }
2150 else {
2151 PerlIOBase(n)->flags &=
2152 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2153 }
2154 n = PerlIONext(n);
2155 }
2156 }
2157 else {
2158 SETERRNO(EBADF, SS_IVCHAN);
2159 }
14a5cf38 2160 return code;
9e353e3b
NIS		 2161}
2162
2163IV
f62ce20a 2164PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2165{
96a5add6 2166 PERL_UNUSED_CONTEXT;
04892f78 2167 if (PerlIOValid(f)) {
14a5cf38
JH		 2168 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2169 }
2170 return 1;
9e353e3b
NIS		 2171}
2172
2173IV
f62ce20a 2174PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2175{
96a5add6 2176 PERL_UNUSED_CONTEXT;
04892f78 2177 if (PerlIOValid(f)) {
14a5cf38
JH		 2178 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2179 }
2180 return 1;
9e353e3b
NIS		 2181}
2182
2183void
f62ce20a 2184PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2185{
04892f78 2186 if (PerlIOValid(f)) {
dcda55fc 2187 PerlIO * const n = PerlIONext(f);
14a5cf38 2188 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2189 if (PerlIOValid(n))
14a5cf38
JH		 2190 PerlIO_clearerr(n);
2191 }
9e353e3b
NIS		 2192}
2193
2194void
f62ce20a 2195PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2196{
96a5add6 2197 PERL_UNUSED_CONTEXT;
04892f78 2198 if (PerlIOValid(f)) {
14a5cf38
JH		 2199 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2200 }
9e353e3b
NIS		 2201}
2202
93a8090d
NIS		 2203SV *
2204PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2205{
2206 if (!arg)
a0714e2c 2207 return NULL;
24d147a6 2208#ifdef USE_ITHREADS
93a8090d 2209 if (param) {
a951d81d
BL		 2210 arg = sv_dup(arg, param);
2211 SvREFCNT_inc_simple_void_NN(arg);
2212 return arg;
93a8090d
NIS		 2213 }
2214 else {
2215 return newSVsv(arg);
2216 }
2217#else
1b6737cc 2218 PERL_UNUSED_ARG(param);
93a8090d
NIS		 2219 return newSVsv(arg);
2220#endif
2221}
2222
2223PerlIO *
ecdeb87c 2224PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d 2225{
1b6737cc 2226 PerlIO * const nexto = PerlIONext(o);
04892f78 2227 if (PerlIOValid(nexto)) {
de009b76 2228 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS		 2229 if (tab && tab->Dup)
2230 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2231 else
2232 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS		 2233 }
2234 if (f) {
dcda55fc 2235 PerlIO_funcs * const self = PerlIOBase(o)->tab;
a951d81d 2236 SV *arg = NULL;
93a8090d 2237 char buf[8];
316ebaf2 2238 assert(self);
e17bc05a
TC		 2239 DEBUG_i(PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2240 self->name,
2241 (void*)f, (void*)o, (void*)param) );
27e6dabe
JH		 2242 if (self->Getarg)
2243 arg = (*self->Getarg)(aTHX_ o, param, flags);
93a8090d 2244 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
df8c7dee 2245 if (f && PerlIOBase(o)->flags & PERLIO_F_UTF8)
f0720f70 2246 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
ef8d46e8 2247 SvREFCNT_dec(arg);
93a8090d
NIS		 2248 }
2249 return f;
2250}
2251
27da23d5 2252/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d 2253
8b84d7dd 2254/* Must be called with PL_perlio_mutex locked. */
22c96fc1 2255static void
ff25d7bc
JH		 2256S_more_refcounted_fds(pTHX_ const int new_fd)
2257 PERL_TSA_REQUIRES(PL_perlio_mutex)
2258{
22c96fc1 2259 const int old_max = PL_perlio_fd_refcnt_size;
f4ae5be6 2260 const int new_max = 16 + (new_fd & ~15);
22c96fc1
NC		 2261 int *new_array;
2262
dd791c72
JH		 2263#ifndef PERL_IMPLICIT_SYS
2264 PERL_UNUSED_CONTEXT;
2265#endif
2266
e17bc05a
TC		 2267 DEBUG_i( PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2268 old_max, new_fd, new_max) );
22c96fc1
NC		 2269
2270 if (new_fd < old_max) {
2271 return;
2272 }
2273
f4ae5be6
NC		 2274 assert (new_max > new_fd);
2275
eae082a0
JH		 2276 /* Use plain realloc() since we need this memory to be really
2277 * global and visible to all the interpreters and/or threads. */
2278 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
22c96fc1
NC		 2279
2280 if (!new_array) {
6cb8cb21 2281 MUTEX_UNLOCK(&PL_perlio_mutex);
4cbe3a7d 2282 croak_no_mem();
22c96fc1
NC		 2283 }
2284
2285 PL_perlio_fd_refcnt_size = new_max;
2286 PL_perlio_fd_refcnt = new_array;
2287
e17bc05a
TC		 2288 DEBUG_i( PerlIO_debug("Zeroing %p, %d\n",
2289 (void*)(new_array + old_max),
2290 new_max - old_max) );
22c96fc1
NC		 2291
2292 Zero(new_array + old_max, new_max - old_max, int);
2293}
2294
2295
93a8090d
NIS		 2296void
2297PerlIO_init(pTHX)
2298{
8b84d7dd 2299 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
96a5add6 2300 PERL_UNUSED_CONTEXT;
93a8090d
NIS		 2301}
2302
168d5872
NIS		 2303void
2304PerlIOUnix_refcnt_inc(int fd)
2305{
27da23d5 2306 dTHX;
22c96fc1 2307 if (fd >= 0) {
22c96fc1 2308
6cb8cb21 2309 MUTEX_LOCK(&PL_perlio_mutex);
22c96fc1
NC		 2310 if (fd >= PL_perlio_fd_refcnt_size)
2311 S_more_refcounted_fds(aTHX_ fd);
2312
27da23d5 2313 PL_perlio_fd_refcnt[fd]++;
8b84d7dd 2314 if (PL_perlio_fd_refcnt[fd] <= 0) {
12605ff9 2315 /* diag_listed_as: refcnt_inc: fd %d%s */
8b84d7dd
RGS		 2316 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2317 fd, PL_perlio_fd_refcnt[fd]);
2318 }
e17bc05a
TC		 2319 DEBUG_i( PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2320 fd, PL_perlio_fd_refcnt[fd]) );
22c96fc1 2321
6cb8cb21 2322 MUTEX_UNLOCK(&PL_perlio_mutex);
8b84d7dd 2323 } else {
12605ff9 2324 /* diag_listed_as: refcnt_inc: fd %d%s */
8b84d7dd 2325 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
168d5872
NIS		 2326 }
2327}
2328
168d5872
NIS		 2329int
2330PerlIOUnix_refcnt_dec(int fd)
2331{
2332 int cnt = 0;
22c96fc1 2333 if (fd >= 0) {
e17bc05a
TC		 2334#ifdef DEBUGGING
2335 dTHX;
2336#else
e17bc05a 2337#endif
6cb8cb21 2338 MUTEX_LOCK(&PL_perlio_mutex);
8b84d7dd 2339 if (fd >= PL_perlio_fd_refcnt_size) {
12605ff9 2340 /* diag_listed_as: refcnt_dec: fd %d%s */
2bcd6579 2341 Perl_croak_nocontext("refcnt_dec: fd %d >= refcnt_size %d\n",
8b84d7dd
RGS		 2342 fd, PL_perlio_fd_refcnt_size);
2343 }
2344 if (PL_perlio_fd_refcnt[fd] <= 0) {
12605ff9 2345 /* diag_listed_as: refcnt_dec: fd %d%s */
2bcd6579 2346 Perl_croak_nocontext("refcnt_dec: fd %d: %d <= 0\n",
8b84d7dd
RGS		 2347 fd, PL_perlio_fd_refcnt[fd]);
2348 }
27da23d5 2349 cnt = --PL_perlio_fd_refcnt[fd];
e17bc05a 2350 DEBUG_i( PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt) );
6cb8cb21 2351 MUTEX_UNLOCK(&PL_perlio_mutex);
8b84d7dd 2352 } else {
12605ff9 2353 /* diag_listed_as: refcnt_dec: fd %d%s */
2bcd6579 2354 Perl_croak_nocontext("refcnt_dec: fd %d < 0\n", fd);
168d5872
NIS		 2355 }
2356 return cnt;
2357}
2358
2e0cfa16
FC		 2359int
2360PerlIOUnix_refcnt(int fd)
2361{
2362 dTHX;
2363 int cnt = 0;
2364 if (fd >= 0) {
2e0cfa16 2365 MUTEX_LOCK(&PL_perlio_mutex);
2e0cfa16
FC		 2366 if (fd >= PL_perlio_fd_refcnt_size) {
2367 /* diag_listed_as: refcnt: fd %d%s */
2368 Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
2369 fd, PL_perlio_fd_refcnt_size);
2370 }
2371 if (PL_perlio_fd_refcnt[fd] <= 0) {
2372 /* diag_listed_as: refcnt: fd %d%s */
2373 Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
2374 fd, PL_perlio_fd_refcnt[fd]);
2375 }
2376 cnt = PL_perlio_fd_refcnt[fd];
2e0cfa16 2377 MUTEX_UNLOCK(&PL_perlio_mutex);
2e0cfa16
FC		 2378 } else {
2379 /* diag_listed_as: refcnt: fd %d%s */
2380 Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
2381 }
2382 return cnt;
2383}
2384
694c95cf
JH		 2385void
2386PerlIO_cleanup(pTHX)
2387{
2388 int i;
2389#ifdef USE_ITHREADS
e17bc05a 2390 DEBUG_i( PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX) );
9f4bd222 2391#else
e17bc05a 2392 DEBUG_i( PerlIO_debug("Cleanup layers\n") );
694c95cf 2393#endif
e47547a8 2394
694c95cf
JH		 2395 /* Raise STDIN..STDERR refcount so we don't close them */
2396 for (i=0; i < 3; i++)
2397 PerlIOUnix_refcnt_inc(i);
2398 PerlIO_cleantable(aTHX_ &PL_perlio);
2399 /* Restore STDIN..STDERR refcount */
2400 for (i=0; i < 3; i++)
2401 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS		 2402
2403 if (PL_known_layers) {
2404 PerlIO_list_free(aTHX_ PL_known_layers);
2405 PL_known_layers = NULL;
2406 }
27da23d5 2407 if (PL_def_layerlist) {
9f4bd222
NIS		 2408 PerlIO_list_free(aTHX_ PL_def_layerlist);
2409 PL_def_layerlist = NULL;
2410 }
6cb8cb21
RGS		 2411}
2412
0934c9d9 2413void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
6cb8cb21 2414{
4f3da17a
DM		 2415#if 0
2416/* XXX we can't rely on an interpreter being present at this late stage,
2417 XXX so we can't use a function like PerlLIO_write that relies on one
2418 being present (at least in win32) :-(.
2419 Disable for now.
2420*/
6cb8cb21
RGS		 2421#ifdef DEBUGGING
2422 {
2423 /* By now all filehandles should have been closed, so any
2424 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2425 * errors. */
77db880c
JH		 2426#define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
2427#define PERLIO_TEARDOWN_MESSAGE_FD 2
2428 char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
6cb8cb21
RGS		 2429 int i;
2430 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
77db880c
JH		 2431 if (PL_perlio_fd_refcnt[i]) {
2432 const STRLEN len =
2433 my_snprintf(buf, sizeof(buf),
2434 "PerlIO_teardown: fd %d refcnt=%d\n",
2435 i, PL_perlio_fd_refcnt[i]);
2436 PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
2437 }
6cb8cb21
RGS		 2438 }
2439 }
2440#endif
4f3da17a 2441#endif
eae082a0
JH		 2442 /* Not bothering with PL_perlio_mutex since by now
2443 * all the interpreters are gone. */
1cd82952
RGS		 2444 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2445 && PL_perlio_fd_refcnt) {
eae082a0 2446 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
432ce874
YO		 2447 PL_perlio_fd_refcnt = NULL;
2448 PL_perlio_fd_refcnt_size = 0;
1cd82952 2449 }
694c95cf
JH		 2450}
2451
9e353e3b 2452/*--------------------------------------------------------------------------------------*/
14a5cf38 2453/*
71200d45 2454 * Bottom-most level for UNIX-like case
14a5cf38 2455 */
9e353e3b 2456
14a5cf38 2457typedef struct {
22569500
NIS		 2458 struct _PerlIO base; /* The generic part */
2459 int fd; /* UNIX like file descriptor */
2460 int oflags; /* open/fcntl flags */
9e353e3b
NIS		 2461} PerlIOUnix;
2462
abf9167d
DM		 2463static void
2464S_lockcnt_dec(pTHX_ const void* f)
2465{
dd791c72
JH		 2466#ifndef PERL_IMPLICIT_SYS
2467 PERL_UNUSED_CONTEXT;
2468#endif
abf9167d
DM		 2469 PerlIO_lockcnt((PerlIO*)f)--;
2470}
2471
2472
2473/* call the signal handler, and if that handler happens to clear
2474 * this handle, free what we can and return true */
2475
2476static bool
2477S_perlio_async_run(pTHX_ PerlIO* f) {
2478 ENTER;
2479 SAVEDESTRUCTOR_X(S_lockcnt_dec, (void*)f);
2480 PerlIO_lockcnt(f)++;
2481 PERL_ASYNC_CHECK();
be48bbe8
CS		 2482 if ( !(PerlIOBase(f)->flags & PERLIO_F_CLEARED) ) {
2483 LEAVE;
abf9167d 2484 return 0;
be48bbe8 2485 }
abf9167d
DM		 2486 /* we've just run some perl-level code that could have done
2487 * anything, including closing the file or clearing this layer.
2488 * If so, free any lower layers that have already been
2489 * cleared, then return an error. */
2490 while (PerlIOValid(f) &&
2491 (PerlIOBase(f)->flags & PERLIO_F_CLEARED))
2492 {
2493 const PerlIOl *l = *f;
2494 *f = l->next;
2495 Safefree(l);
2496 }
be48bbe8 2497 LEAVE;
abf9167d
DM		 2498 return 1;
2499}
2500
6f9d8c32 2501int
9e353e3b 2502PerlIOUnix_oflags(const char *mode)
760ac839 2503{
14a5cf38 2504 int oflags = -1;
3b6c1aba 2505 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH		 2506 mode++;
2507 switch (*mode) {
2508 case 'r':
2509 oflags = O_RDONLY;
2510 if (*++mode == '+') {
2511 oflags = O_RDWR;
2512 mode++;
2513 }
2514 break;
2515
2516 case 'w':
2517 oflags = O_CREAT | O_TRUNC;
2518 if (*++mode == '+') {
2519 oflags |= O_RDWR;
2520 mode++;
2521 }
2522 else
2523 oflags |= O_WRONLY;
2524 break;
2525
2526 case 'a':
2527 oflags = O_CREAT | O_APPEND;
2528 if (*++mode == '+') {
2529 oflags |= O_RDWR;
2530 mode++;
2531 }
2532 else
2533 oflags |= O_WRONLY;
2534 break;
2535 }
43e5477e
JH		 2536
2537 /* XXX TODO: PerlIO_open() test that exercises 'rb' and 'rt'. */
2538
2539 /* Unless O_BINARY is different from O_TEXT, first bit-or:ing one
2540 * of them in, and then bit-and-masking the other them away, won't
2541 * have much of an effect. */
2542 switch (*mode) {
2543 case 'b':
2544#if O_TEXT != O_BINARY
2545 oflags |= O_BINARY;
14a5cf38 2546 oflags &= ~O_TEXT;
43e5477e
JH		 2547#endif
2548 mode++;
2549 break;
2550 case 't':
2551#if O_TEXT != O_BINARY
14a5cf38
JH		 2552 oflags |= O_TEXT;
2553 oflags &= ~O_BINARY;
43e5477e
JH		 2554#endif
2555 mode++;
2556 break;
2557 default:
2558# if O_BINARY != 0
2559 /* bit-or:ing with zero O_BINARY would be useless. */
93f31ee9
PG		 2560 /*
2561 * If neither "t" nor "b" was specified, open the file
2562 * in O_BINARY mode.
43e5477e
JH		 2563 *
2564 * Note that if something else than the zero byte was seen
2565 * here (e.g. bogus mode "rx"), just few lines later we will
2566 * set the errno and invalidate the flags.
93f31ee9
PG		 2567 */
2568 oflags |= O_BINARY;
43e5477e
JH		 2569# endif
2570 break;
93f31ee9 2571 }
14a5cf38 2572 if (*mode || oflags == -1) {
93189314 2573 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH		 2574 oflags = -1;
2575 }
2576 return oflags;
9e353e3b
NIS		 2577}
2578
2579IV
f62ce20a 2580PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2581{
96a5add6 2582 PERL_UNUSED_CONTEXT;
14a5cf38 2583 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS		 2584}
2585
aa063c35
NIS		 2586static void
2587PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2588{
de009b76 2589 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2590#if defined(WIN32)
aa063c35
NIS		 2591 Stat_t st;
2592 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2593 if (!S_ISREG(st.st_mode)) {
e17bc05a 2594 DEBUG_i( PerlIO_debug("%d is not regular file\n",fd) );
6caa5a9c
NIS		 2595 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2596 }
aa063c35 2597 else {
e17bc05a 2598 DEBUG_i( PerlIO_debug("%d _is_ a regular file\n",fd) );
aa063c35 2599 }
6caa5a9c
NIS		 2600 }
2601#endif
aa063c35
NIS		 2602 s->fd = fd;
2603 s->oflags = imode;
2604 PerlIOUnix_refcnt_inc(fd);
96a5add6 2605 PERL_UNUSED_CONTEXT;
aa063c35
NIS		 2606}
2607
2608IV
2609PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2610{
2611 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2612 if (*PerlIONext(f)) {
4b069b44 2613 /* We never call down so do any pending stuff now */
03c0554d 2614 PerlIO_flush(PerlIONext(f));
14a5cf38 2615 /*
71200d45 2616 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2617 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2618 * Should the value on NULL mode be 0 or -1?
14a5cf38 2619 */
acbd16bf 2620 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2621 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH		 2622 }
2623 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2624
14a5cf38 2625 return code;
4b803d04
NIS		 2626}
2627
c2fcde81
JH		 2628IV
2629PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2630{
de009b76 2631 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2632 Off_t new_loc;
96a5add6 2633 PERL_UNUSED_CONTEXT;
c2fcde81
JH		 2634 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2635#ifdef ESPIPE
2636 SETERRNO(ESPIPE, LIB_INVARG);
2637#else
2638 SETERRNO(EINVAL, LIB_INVARG);
2639#endif
2640 return -1;
2641 }
0723351e
NC		 2642 new_loc = PerlLIO_lseek(fd, offset, whence);
2643 if (new_loc == (Off_t) - 1)
dcda55fc 2644 return -1;
c2fcde81
JH		 2645 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2646 return 0;
2647}
2648
9e353e3b 2649PerlIO *
14a5cf38
JH		 2650PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2651 IV n, const char *mode, int fd, int imode,
2652 int perm, PerlIO *f, int narg, SV **args)
2653{
884fc2d3 2654 bool known_cloexec = 0;
d9dac8cd 2655 if (PerlIOValid(f)) {
cc6623a8 2656 if (PerlIOBase(f)->tab && PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2657 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH		 2658 }
2659 if (narg > 0) {
3b6c1aba 2660 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH		 2661 mode++;
2662 else {
2663 imode = PerlIOUnix_oflags(mode);
5e2ce0f3
CB		 2664#ifdef VMS
2665 perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
2666#else
14a5cf38 2667 perm = 0666;
5e2ce0f3 2668#endif
14a5cf38
JH		 2669 }
2670 if (imode != -1) {
41188aa0
TC		 2671 STRLEN len;
2672 const char *path = SvPV_const(*args, len);
2673 if (!IS_SAFE_PATHNAME(path, len, "open"))
c8028aa6 2674 return NULL;
884fc2d3
Z		 2675 fd = PerlLIO_open3_cloexec(path, imode, perm);
2676 known_cloexec = 1;
14a5cf38
JH		 2677 }
2678 }
2679 if (fd >= 0) {
884fc2d3
Z		 2680 if (known_cloexec)
2681 setfd_inhexec_for_sysfd(fd);
2682 else
2683 setfd_cloexec_or_inhexec_by_sysfdness(fd);
3b6c1aba 2684 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH		 2685 mode++;
2686 if (!f) {
2687 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS		 2688 }
2689 if (!PerlIOValid(f)) {
a33cf58c 2690 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
0a20f69b 2691 PerlLIO_close(fd);
a33cf58c
NIS		 2692 return NULL;
2693 }
d9dac8cd 2694 }
aa063c35 2695 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2696 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH		 2697 if (*mode == IoTYPE_APPEND)
2698 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH		 2699 return f;
2700 }
2701 else {
2702 if (f) {
6f207bd3 2703 NOOP;
14a5cf38 2704 /*
71200d45 2705 * FIXME: pop layers ???
14a5cf38
JH		 2706 */
2707 }
2708 return NULL;
2709 }
9e353e3b
NIS		 2710}
2711
71200d45 2712PerlIO *
ecdeb87c 2713PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 2714{
dcda55fc 2715 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2716 int fd = os->fd;
ecdeb87c 2717 if (flags & PERLIO_DUP_FD) {
884fc2d3
Z		 2718 fd = PerlLIO_dup_cloexec(fd);
2719 if (fd >= 0)
2720 setfd_inhexec_for_sysfd(fd);
ecdeb87c 2721 }
22c96fc1 2722 if (fd >= 0) {
ecdeb87c 2723 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 2724 if (f) {
2725 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2726 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS		 2727 return f;
2728 }
0a20f69b 2729 PerlLIO_close(fd);
71200d45
NIS		 2730 }
2731 return NULL;
2732}
2733
2734
9e353e3b 2735SSize_t
f62ce20a 2736PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2737{
abf9167d
DM		 2738 int fd;
2739 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2740 return -1;
2741 fd = PerlIOSelf(f, PerlIOUnix)->fd;
81428673 2742 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2743 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2744 return 0;
1fd8f4ce 2745 }
14a5cf38 2746 while (1) {
b464bac0 2747 const SSize_t len = PerlLIO_read(fd, vbuf, count);
14a5cf38 2748 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS		 2749 if (len < 0) {
2750 if (errno != EAGAIN) {
2751 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
0ea86a10 2752 PerlIO_save_errno(f);
ba85f2ea
NIS		 2753 }
2754 }
2755 else if (len == 0 && count != 0) {
14a5cf38 2756 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS		 2757 SETERRNO(0,0);
2758 }
14a5cf38
JH		 2759 return len;
2760 }
abf9167d
DM		 2761 /* EINTR */
2762 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2763 return -1;
14a5cf38 2764 }
e5964223 2765 NOT_REACHED; /*NOTREACHED*/
9e353e3b
NIS		 2766}
2767
2768SSize_t
f62ce20a 2769PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2770{
abf9167d
DM		 2771 int fd;
2772 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2773 return -1;
2774 fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2775 while (1) {
de009b76 2776 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2777 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS		 2778 if (len < 0) {
2779 if (errno != EAGAIN) {
2780 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
0ea86a10 2781 PerlIO_save_errno(f);
ba85f2ea
NIS		 2782 }
2783 }
14a5cf38
JH		 2784 return len;
2785 }
abf9167d
DM		 2786 /* EINTR */
2787 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2788 return -1;
06da4f11 2789 }
e5964223 2790 NOT_REACHED; /*NOTREACHED*/
9e353e3b
NIS		 2791}
2792
9e353e3b 2793Off_t
f62ce20a 2794PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2795{
96a5add6
AL		 2796 PERL_UNUSED_CONTEXT;
2797
14a5cf38 2798 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS		 2799}
2800
2556f95e
GF		 2801
2802IV
2376d97d 2803PerlIOUnix_close(pTHX_ PerlIO *f)
2556f95e 2804{
de009b76 2805 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2806 int code = 0;
168d5872 2807 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
d55a1461 2808 code = PerlIOBase_close(aTHX_ f);
168d5872 2809 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS		 2810 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2811 return 0;
22569500 2812 }
93a8090d
NIS		 2813 }
2814 else {
93189314 2815 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS		 2816 return -1;
2817 }
14a5cf38
JH		 2818 while (PerlLIO_close(fd) != 0) {
2819 if (errno != EINTR) {
2820 code = -1;
2821 break;
2822 }
abf9167d
DM		 2823 /* EINTR */
2824 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2825 return -1;
14a5cf38
JH		 2826 }
2827 if (code == 0) {
2828 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2829 }
2830 return code;
9e353e3b
NIS		 2831}
2832
27da23d5 2833PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2834 sizeof(PerlIO_funcs),
14a5cf38
JH		 2835 "unix",
2836 sizeof(PerlIOUnix),
2837 PERLIO_K_RAW,
2838 PerlIOUnix_pushed,
2376d97d 2839 PerlIOBase_popped,
14a5cf38 2840 PerlIOUnix_open,
86e05cf2 2841 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 2842 NULL,
2843 PerlIOUnix_fileno,
71200d45 2844 PerlIOUnix_dup,
14a5cf38
JH		 2845 PerlIOUnix_read,
2846 PerlIOBase_unread,
2847 PerlIOUnix_write,
2848 PerlIOUnix_seek,
2849 PerlIOUnix_tell,
2850 PerlIOUnix_close,
22569500
NIS		 2851 PerlIOBase_noop_ok, /* flush */
2852 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH		 2853 PerlIOBase_eof,
2854 PerlIOBase_error,
2855 PerlIOBase_clearerr,
2856 PerlIOBase_setlinebuf,
22569500
NIS		 2857 NULL, /* get_base */
2858 NULL, /* get_bufsiz */
2859 NULL, /* get_ptr */
2860 NULL, /* get_cnt */
2861 NULL, /* set_ptrcnt */
9e353e3b
NIS		 2862};
2863
2864/*--------------------------------------------------------------------------------------*/
14a5cf38 2865/*
71200d45 2866 * stdio as a layer
14a5cf38 2867 */
9e353e3b 2868
313e59c8
NIS		 2869#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2870/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2871 broken by the last second glibc 2.3 fix
2872 */
2873#define STDIO_BUFFER_WRITABLE
2874#endif
2875
2876
14a5cf38
JH		 2877typedef struct {
2878 struct _PerlIO base;
22569500 2879 FILE *stdio; /* The stream */
9e353e3b
NIS		 2880} PerlIOStdio;
2881
2882IV
f62ce20a 2883PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2884{
96a5add6
AL		 2885 PERL_UNUSED_CONTEXT;
2886
c4420975
AL		 2887 if (PerlIOValid(f)) {
2888 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2889 if (s)
2890 return PerlSIO_fileno(s);
439ba545
NIS		 2891 }
2892 errno = EBADF;
2893 return -1;
9e353e3b
NIS		 2894}
2895
766a733e 2896char *
14a5cf38
JH		 2897PerlIOStdio_mode(const char *mode, char *tmode)
2898{
de009b76 2899 char * const ret = tmode;
a0625d38
SR		 2900 if (mode) {
2901 while (*mode) {
2902 *tmode++ = *mode++;
2903 }
14a5cf38 2904 }
95005ad8 2905#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH		 2906 *tmode++ = 'b';
2907#endif
14a5cf38
JH		 2908 *tmode = '\0';
2909 return ret;
2910}
2911
4b803d04 2912IV
2dc2558e 2913PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2914{
1fd8f4ce
NIS		 2915 PerlIO *n;
2916 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
46c461b5 2917 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
1fd8f4ce
NIS		 2918 if (toptab == tab) {
2919 /* Top is already stdio - pop self (duplicate) and use original */
2920 PerlIO_pop(aTHX_ f);
2921 return 0;
2922 } else {
de009b76 2923 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS		 2924 char tmode[8];
2925 FILE *stdio;
81428673 2926 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS		 2927 mode = PerlIOStdio_mode(mode, tmode)))) {
2928 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2929 /* We never call down so do any pending stuff now */
2930 PerlIO_flush(PerlIONext(f));
2a600bb8 2931 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
81428673 2932 }
1fd8f4ce
NIS		 2933 else {
2934 return -1;
2935 }
2936 }
14a5cf38 2937 }
2dc2558e 2938 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS		 2939}
2940
22569500 2941
9e353e3b 2942PerlIO *
4b069b44 2943PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2944{
14a5cf38
JH		 2945 dTHX;
2946 PerlIO *f = NULL;
ea5bc90f
YK		 2947#ifdef EBCDIC
2948 int rc;
2949 char filename[FILENAME_MAX];
2950 fldata_t fileinfo;
2951#endif
14a5cf38 2952 if (stdio) {
22569500 2953 PerlIOStdio *s;
375ed12a
JH		 2954 int fd0 = fileno(stdio);
2955 if (fd0 < 0) {
ea5bc90f
YK		 2956#ifdef EBCDIC
2957 rc = fldata(stdio,filename,&fileinfo);
2958 if(rc != 0){
2959 return NULL;
2960 }
2961 if(fileinfo.__dsorgHFS){
2962 return NULL;
2963 }
2964 /*This MVS dataset , OK!*/
2965#else
375ed12a 2966 return NULL;
ea5bc90f 2967#endif
375ed12a 2968 }
4b069b44
NIS		 2969 if (!mode || !*mode) {
2970 /* We need to probe to see how we can open the stream
2971 so start with read/write and then try write and read
2972 we dup() so that we can fclose without loosing the fd.
2973
2974 Note that the errno value set by a failing fdopen
2975 varies between stdio implementations.
2976 */
884fc2d3 2977 const int fd = PerlLIO_dup_cloexec(fd0);
375ed12a
JH		 2978 FILE *f2;
2979 if (fd < 0) {
2980 return f;
2981 }
2982 f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2983 if (!f2) {
a33cf58c 2984 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS		 2985 }
2986 if (!f2) {
a33cf58c 2987 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS		 2988 }
2989 if (!f2) {
2990 /* Don't seem to be able to open */
2991 PerlLIO_close(fd);
2992 return f;
2993 }
2994 fclose(f2);
22569500 2995 }
de092133 2996 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
a33cf58c
NIS		 2997 s = PerlIOSelf(f, PerlIOStdio);
2998 s->stdio = stdio;
884fc2d3
Z		 2999 fd0 = fileno(stdio);
3000 if(fd0 != -1){
3001 PerlIOUnix_refcnt_inc(fd0);
3002 setfd_cloexec_or_inhexec_by_sysfdness(fd0);
3003 }
ea5bc90f 3004#ifdef EBCDIC
ea5bc90f
YK		 3005 else{
3006 rc = fldata(stdio,filename,&fileinfo);
3007 if(rc != 0){
3008 PerlIOUnix_refcnt_inc(fd0);
3009 }
3010 if(fileinfo.__dsorgHFS){
3011 PerlIOUnix_refcnt_inc(fd0);
3012 }
3013 /*This MVS dataset , OK!*/
3014 }
ea5bc90f 3015#endif
a33cf58c 3016 }
14a5cf38
JH		 3017 }
3018 return f;
9e353e3b
NIS		 3019}
3020
3021PerlIO *
14a5cf38
JH		 3022PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3023 IV n, const char *mode, int fd, int imode,
3024 int perm, PerlIO *f, int narg, SV **args)
3025{
3026 char tmode[8];
d9dac8cd 3027 if (PerlIOValid(f)) {
41188aa0
TC		 3028 STRLEN len;
3029 const char * const path = SvPV_const(*args, len);
dcda55fc 3030 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
1751d015 3031 FILE *stdio;
41188aa0 3032 if (!IS_SAFE_PATHNAME(path, len, "open"))
c8028aa6 3033 return NULL;
1751d015 3034 PerlIOUnix_refcnt_dec(fileno(s->stdio));
de092133
JH		 3035 stdio = PerlSIO_freopen(path, PerlIOStdio_mode(mode, tmode),
3036 s->stdio);
14a5cf38
JH		 3037 if (!s->stdio)
3038 return NULL;
3039 s->stdio = stdio;
884fc2d3
Z		 3040 fd = fileno(stdio);
3041 PerlIOUnix_refcnt_inc(fd);
3042 setfd_cloexec_or_inhexec_by_sysfdness(fd);
14a5cf38
JH		 3043 return f;
3044 }
3045 else {
3046 if (narg > 0) {
41188aa0
TC		 3047 STRLEN len;
3048 const char * const path = SvPV_const(*args, len);
3049 if (!IS_SAFE_PATHNAME(path, len, "open"))
c8028aa6 3050 return NULL;
3b6c1aba 3051 if (*mode == IoTYPE_NUMERIC) {
14a5cf38 3052 mode++;
884fc2d3 3053 fd = PerlLIO_open3_cloexec(path, imode, perm);
14a5cf38
JH		 3054 }
3055 else {
95005ad8
GH		 3056 FILE *stdio;
3057 bool appended = FALSE;
3058#ifdef __CYGWIN__
3059 /* Cygwin wants its 'b' early. */
3060 appended = TRUE;
3061 mode = PerlIOStdio_mode(mode, tmode);
3062#endif
3063 stdio = PerlSIO_fopen(path, mode);
6f0313ac 3064 if (stdio) {
6f0313ac
JH		 3065 if (!f) {
3066 f = PerlIO_allocate(aTHX);
3067 }
95005ad8
GH		 3068 if (!appended)
3069 mode = PerlIOStdio_mode(mode, tmode);
3070 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
3071 if (f) {
0f0f9e2b 3072 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
884fc2d3
Z		 3073 fd = fileno(stdio);
3074 PerlIOUnix_refcnt_inc(fd);
3075 setfd_cloexec_or_inhexec_by_sysfdness(fd);
0f0f9e2b
JH		 3076 } else {
3077 PerlSIO_fclose(stdio);
6f0313ac
JH		 3078 }
3079 return f;
3080 }
3081 else {
3082 return NULL;
3083 }
14a5cf38
JH		 3084 }
3085 }
3086 if (fd >= 0) {
3087 FILE *stdio = NULL;
3088 int init = 0;
3b6c1aba 3089 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH		 3090 init = 1;
3091 mode++;
3092 }
3093 if (init) {
3094 switch (fd) {
3095 case 0:
3096 stdio = PerlSIO_stdin;
3097 break;
3098 case 1:
3099 stdio = PerlSIO_stdout;
3100 break;
3101 case 2:
3102 stdio = PerlSIO_stderr;
3103 break;
3104 }
3105 }
3106 else {
3107 stdio = PerlSIO_fdopen(fd, mode =
3108 PerlIOStdio_mode(mode, tmode));
3109 }
3110 if (stdio) {
d9dac8cd
NIS		 3111 if (!f) {
3112 f = PerlIO_allocate(aTHX);
3113 }
a33cf58c 3114 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
1a159fba 3115 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
884fc2d3
Z		 3116 fd = fileno(stdio);
3117 PerlIOUnix_refcnt_inc(fd);
3118 setfd_cloexec_or_inhexec_by_sysfdness(fd);
a33cf58c 3119 }
14a5cf38
JH		 3120 return f;
3121 }
0a20f69b 3122 PerlLIO_close(fd);
14a5cf38
JH		 3123 }
3124 }
ee518936 3125 return NULL;
9e353e3b
NIS		 3126}
3127
1751d015 3128PerlIO *
ecdeb87c 3129PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS		 3130{
3131 /* This assumes no layers underneath - which is what
3132 happens, but is not how I remember it. NI-S 2001/10/16
3133 */
ecdeb87c 3134 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 3135 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 3136 const int fd = fileno(stdio);
9217ff3f 3137 char mode[8];
ecdeb87c 3138 if (flags & PERLIO_DUP_FD) {
884fc2d3 3139 const int dfd = PerlLIO_dup_cloexec(fileno(stdio));
9217ff3f
NIS		 3140 if (dfd >= 0) {
3141 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
3142 goto set_this;
ecdeb87c
NIS		 3143 }
3144 else {
6f207bd3 3145 NOOP;
ecdeb87c
NIS		 3146 /* FIXME: To avoid messy error recovery if dup fails
3147 re-use the existing stdio as though flag was not set
3148 */
3149 }
3150 }
9217ff3f
NIS		 3151 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3152 set_this:
694c95cf 3153 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
40596bc5 3154 if(stdio) {
884fc2d3
Z		 3155 int fd = fileno(stdio);
3156 PerlIOUnix_refcnt_inc(fd);
3157 setfd_cloexec_or_inhexec_by_sysfdness(fd);
40596bc5 3158 }
1751d015
NIS		 3159 }
3160 return f;
3161}
3162
0d7a5398
NIS		 3163static int
3164PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3165{
96a5add6
AL		 3166 PERL_UNUSED_CONTEXT;
3167
0d7a5398 3168 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 3169 * PerlIO_set_fileno() support from Configure
0d7a5398 3170 */
36b1c892
AD		 3171# if defined(HAS_FDCLOSE)
3172 return fdclose(f, NULL) == 0 ? 1 : 0;
3173# elif defined(__UCLIBC__)
ef8eacb8
AT		 3174 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3175 f->__filedes = -1;
3176 return 1;
3177# elif defined(__GLIBC__)
0d7a5398 3178 /* There may be a better way for GLIBC:
37725cdc 3179 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS		 3180 */
3181 f->_fileno = -1;
3182 return 1;
bdea967c 3183# elif defined(__sun)
f5992bc4 3184 PERL_UNUSED_ARG(f);
cfedb851 3185 return 0;
0d7a5398
NIS		 3186# elif defined(__hpux)
3187 f->__fileH = 0xff;
3188 f->__fileL = 0xff;
3189 return 1;
9837d373 3190 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 3191 your platform does not have special entry try this one.
9837d373
NIS		 3192 [For OSF only have confirmation for Tru64 (alpha)
3193 but assume other OSFs will be similar.]
37725cdc 3194 */
9837d373 3195# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS		 3196 f->_file = -1;
3197 return 1;
3198# elif defined(__FreeBSD__)
3199 /* There may be a better way on FreeBSD:
37725cdc
NIS		 3200 - we could insert a dummy func in the _close function entry
3201 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS		 3202 */
3203 f->_file = -1;
0c49ea6a
SU		 3204 return 1;
3205# elif defined(__OpenBSD__)
3206 /* There may be a better way on OpenBSD:
3207 - we could insert a dummy func in the _close function entry
3208 f->_close = (int (*)(void *)) dummy_close;
3209 */
3210 f->_file = -1;
0d7a5398 3211 return 1;
59ad941d
IZ		 3212# elif defined(__EMX__)
3213 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3214 f->_handle = -1;
3215 return 1;
0d7a5398
NIS		 3216# elif defined(__CYGWIN__)
3217 /* There may be a better way on CYGWIN:
37725cdc
NIS		 3218 - we could insert a dummy func in the _close function entry
3219 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS		 3220 */
3221 f->_file = -1;
3222 return 1;
3223# elif defined(WIN32)
1f664ef5 3224 PERLIO_FILE_file(f) = -1;
0d7a5398
NIS		 3225 return 1;
3226# else
3227#if 0
37725cdc 3228 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 3229 (which isn't thread safe) instead
37725cdc 3230 */
0d7a5398
NIS		 3231# error "Don't know how to set FILE.fileno on your platform"
3232#endif
8772537c 3233 PERL_UNUSED_ARG(f);
0d7a5398
NIS		 3234 return 0;
3235# endif
3236}
3237
1751d015 3238IV
f62ce20a 3239PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 3240{
c4420975 3241 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS		 3242 if (!stdio) {
3243 errno = EBADF;
3244 return -1;
3245 }
9217ff3f 3246 else {
de009b76 3247 const int fd = fileno(stdio);
0d7a5398 3248 int invalidate = 0;
bbfd922f 3249 IV result = 0;
1d791a44 3250 int dupfd = -1;
4ee39169 3251 dSAVEDERRNO;
a2e578da 3252#ifdef USE_ITHREADS
a2e578da 3253#endif
0d7a5398 3254#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS		 3255 /* Socks lib overrides close() but stdio isn't linked to
3256 that library (though we are) - so we must call close()
3257 on sockets on stdio's behalf.
3258 */
0d7a5398
NIS		 3259 int optval;
3260 Sock_size_t optlen = sizeof(int);
6b4ce6c8 3261 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
37725cdc 3262 invalidate = 1;
0d7a5398 3263#endif
d8723f43
NC		 3264 /* Test for -1, as *BSD stdio (at least) on fclose sets the FILE* such
3265 that a subsequent fileno() on it returns -1. Don't want to croak()
3266 from within PerlIOUnix_refcnt_dec() if some buggy caller code is
3267 trying to close an already closed handle which somehow it still has
3268 a reference to. (via.xs, I'm looking at you). */
3269 if (fd != -1 && PerlIOUnix_refcnt_dec(fd) > 0) {
3270 /* File descriptor still in use */
0d7a5398 3271 invalidate = 1;
d8723f43 3272 }
0d7a5398 3273 if (invalidate) {
6b4ce6c8
AL		 3274 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3275 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3276 return 0;
3277 if (stdio == stdout || stdio == stderr)
3278 return PerlIO_flush(f);
d88f7f65 3279 }
d88f7f65
JH		 3280 MUTEX_LOCK(&PL_perlio_mutex);
3281 /* Right. We need a mutex here because for a brief while we
3282 will have the situation that fd is actually closed. Hence if
3283 a second thread were to get into this block, its dup() would
3284 likely return our fd as its dupfd. (after all, it is closed)
3285 Then if we get to the dup2() first, we blat the fd back
3286 (messing up its temporary as a side effect) only for it to
3287 then close its dupfd (== our fd) in its close(dupfd) */
3288
3289 /* There is, of course, a race condition, that any other thread
3290 trying to input/output/whatever on this fd will be stuffed
3291 for the duration of this little manoeuvrer. Perhaps we
3292 should hold an IO mutex for the duration of every IO
3293 operation if we know that invalidate doesn't work on this
3294 platform, but that would suck, and could kill performance.
3295
3296 Except that correctness trumps speed.
3297 Advice from klortho #11912. */
d88f7f65 3298 if (invalidate) {
37725cdc
NIS		 3299 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3300 Use Sarathy's trick from maint-5.6 to invalidate the
3301 fileno slot of the FILE *
3302 */
bbfd922f 3303 result = PerlIO_flush(f);
4ee39169 3304 SAVE_ERRNO;
6b4ce6c8 3305 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
711e8db2 3306 if (!invalidate) {
884fc2d3 3307 dupfd = PerlLIO_dup_cloexec(fd);
711e8db2 3308#ifdef USE_ITHREADS
9bab90c0 3309 if (dupfd < 0) {
711e8db2
NC		 3310 /* Oh cXap. This isn't going to go well. Not sure if we can
3311 recover from here, or if closing this particular FILE *
3312 is a good idea now. */
3313 }
3314#endif
3315 }
94ccb807
JH		 3316 } else {
3317 SAVE_ERRNO; /* This is here only to silence compiler warnings */
37725cdc 3318 }
0d7a5398 3319 result = PerlSIO_fclose(stdio);
37725cdc
NIS		 3320 /* We treat error from stdio as success if we invalidated
3321 errno may NOT be expected EBADF
e8529473
NIS		 3322 */
3323 if (invalidate && result != 0) {
4ee39169 3324 RESTORE_ERRNO;
0d7a5398 3325 result = 0;
37725cdc 3326 }
6b4ce6c8
AL		 3327#ifdef SOCKS5_VERSION_NAME
3328 /* in SOCKS' case, let close() determine return value */
3329 result = close(fd);
3330#endif
1d791a44 3331 if (dupfd >= 0) {
884fc2d3
Z		 3332 PerlLIO_dup2_cloexec(dupfd, fd);
3333 setfd_inhexec_for_sysfd(fd);
9bab90c0 3334 PerlLIO_close(dupfd);
d88f7f65 3335 }
d88f7f65 3336 MUTEX_UNLOCK(&PL_perlio_mutex);
9217ff3f 3337 return result;
37725cdc 3338 }
1751d015
NIS		 3339}
3340
9e353e3b 3341SSize_t
f62ce20a 3342PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3343{
abf9167d 3344 FILE * s;
14a5cf38 3345 SSize_t got = 0;
abf9167d
DM		 3346 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3347 return -1;
3348 s = PerlIOSelf(f, PerlIOStdio)->stdio;
4d948241
NIS		 3349 for (;;) {
3350 if (count == 1) {
3351 STDCHAR *buf = (STDCHAR *) vbuf;
3352 /*
3353 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3354 * stdio does not do that for fread()
3355 */
de009b76 3356 const int ch = PerlSIO_fgetc(s);
4d948241
NIS		 3357 if (ch != EOF) {
3358 *buf = ch;
3359 got = 1;
3360 }
14a5cf38 3361 }
4d948241
NIS		 3362 else
3363 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS		 3364 if (got == 0 && PerlSIO_ferror(s))
3365 got = -1;
42a7a32f 3366 if (got >= 0 || errno != EINTR)
4d948241 3367 break;
abf9167d
DM		 3368 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3369 return -1;
42a7a32f 3370 SETERRNO(0,0); /* just in case */
14a5cf38 3371 }
bdae4172
JH		 3372#ifdef __sgi
3373 /* Under some circumstances IRIX stdio fgetc() and fread()
3374 * set the errno to ENOENT, which makes no sense according
3375 * to either IRIX or POSIX. [rt.perl.org #123977] */
3376 if (errno == ENOENT) SETERRNO(0,0);
3377#endif
14a5cf38 3378 return got;
9e353e3b
NIS		 3379}
3380
3381SSize_t
f62ce20a 3382PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3383{
14a5cf38 3384 SSize_t unread = 0;
c4420975 3385 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3386
313e59c8 3387#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3388 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS		 3389 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3390 STDCHAR *base = PerlIO_get_base(f);
3391 SSize_t cnt = PerlIO_get_cnt(f);
3392 STDCHAR *ptr = PerlIO_get_ptr(f);
3393 SSize_t avail = ptr - base;
3394 if (avail > 0) {
3395 if (avail > count) {
3396 avail = count;
3397 }
3398 ptr -= avail;
3399 Move(buf-avail,ptr,avail,STDCHAR);
3400 count -= avail;
3401 unread += avail;
3402 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS		 3403 if (PerlSIO_feof(s) && unread >= 0)
3404 PerlSIO_clearerr(s);
3405 }
3406 }
313e59c8
NIS		 3407 else
3408#endif
3409 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS		 3410 /* We can get pointer to buffer but not its base
3411 Do ungetc() but check chars are ending up in the
3412 buffer
3413 */
3414 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3415 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3416 while (count > 0) {
de009b76 3417 const int ch = *--buf & 0xFF;
9f7cd136
NIS		 3418 if (ungetc(ch,s) != ch) {
3419 /* ungetc did not work */
3420 break;
3421 }
3422 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3423 /* Did not change pointer as expected */
375ed12a
JH		 3424 if (fgetc(s) != EOF) /* get char back again */
3425 break;
9f7cd136
NIS		 3426 }
3427 /* It worked ! */
3428 count--;
3429 unread++;
93679785
NIS		 3430 }
3431 }
3432
3433 if (count > 0) {
3434 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 3435 }
3436 return unread;
9e353e3b
NIS		 3437}
3438
3439SSize_t
f62ce20a 3440PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3441{
4d948241 3442 SSize_t got;
abf9167d
DM		 3443 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3444 return -1;
4d948241
NIS		 3445 for (;;) {
3446 got = PerlSIO_fwrite(vbuf, 1, count,
3447 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3448 if (got >= 0 || errno != EINTR)
4d948241 3449 break;
abf9167d
DM		 3450 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3451 return -1;
42a7a32f 3452 SETERRNO(0,0); /* just in case */
4d948241
NIS		 3453 }
3454 return got;
9e353e3b
NIS		 3455}
3456
94a175e1 3457IV
f62ce20a 3458PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3459{
c4420975 3460 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL		 3461 PERL_UNUSED_CONTEXT;
3462
94a175e1 3463 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS		 3464}
3465
3466Off_t
f62ce20a 3467PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3468{
c4420975 3469 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL		 3470 PERL_UNUSED_CONTEXT;
3471
94a175e1 3472 return PerlSIO_ftell(stdio);
9e353e3b
NIS		 3473}
3474
3475IV
f62ce20a 3476PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3477{
c4420975 3478 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL		 3479 PERL_UNUSED_CONTEXT;
3480
14a5cf38
JH		 3481 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3482 return PerlSIO_fflush(stdio);
3483 }
3484 else {
6f207bd3 3485 NOOP;
88b61e10 3486#if 0
14a5cf38
JH		 3487 /*
3488 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3489 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3490 * design is to do _this_ but not have layer above flush this
71200d45 3491 * layer read-to-read
14a5cf38
JH		 3492 */
3493 /*
71200d45 3494 * Not writeable - sync by attempting a seek
14a5cf38 3495 */
4ee39169 3496 dSAVE_ERRNO;
14a5cf38 3497 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
4ee39169 3498 RESTORE_ERRNO;
88b61e10 3499#endif
14a5cf38
JH		 3500 }
3501 return 0;
9e353e3b
NIS		 3502}
3503
3504IV
f62ce20a 3505PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3506{
96a5add6
AL		 3507 PERL_UNUSED_CONTEXT;
3508
14a5cf38 3509 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 3510}
3511
3512IV
f62ce20a 3513PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3514{
96a5add6
AL		 3515 PERL_UNUSED_CONTEXT;
3516
263df5f1 3517 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 3518}
3519
3520void
f62ce20a 3521PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3522{
96a5add6
AL		 3523 PERL_UNUSED_CONTEXT;
3524
14a5cf38 3525 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS		 3526}
3527
3528void
f62ce20a 3529PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 3530{
96a5add6
AL		 3531 PERL_UNUSED_CONTEXT;
3532
9e353e3b 3533#ifdef HAS_SETLINEBUF
14a5cf38 3534 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3535#else
bd61b366 3536 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
9e353e3b
NIS		 3537#endif
3538}
3539
3540#ifdef FILE_base
3541STDCHAR *
f62ce20a 3542PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3543{
c4420975 3544 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
e9b8343f 3545 PERL_UNUSED_CONTEXT;
cc00df79 3546 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS		 3547}
3548
3549Size_t
f62ce20a 3550PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3551{
c4420975 3552 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
e9b8343f 3553 PERL_UNUSED_CONTEXT;
14a5cf38 3554 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS		 3555}
3556#endif
3557
3558#ifdef USE_STDIO_PTR
3559STDCHAR *
f62ce20a 3560PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3561{
c4420975 3562 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
e9b8343f 3563 PERL_UNUSED_CONTEXT;
cc00df79 3564 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS		 3565}
3566
3567SSize_t
f62ce20a 3568PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3569{
c4420975 3570 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
e9b8343f 3571 PERL_UNUSED_CONTEXT;
14a5cf38 3572 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS		 3573}
3574
3575void
f62ce20a 3576PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3577{
c4420975 3578 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
e9b8343f 3579 PERL_UNUSED_CONTEXT;
14a5cf38 3580 if (ptr != NULL) {
9e353e3b 3581#ifdef STDIO_PTR_LVALUE
46f05249
JH		 3582 /* This is a long-standing infamous mess. The root of the
3583 * problem is that one cannot know the signedness of char, and
3584 * more precisely the signedness of FILE._ptr. The following
3585 * things have been tried, and they have all failed (across
3586 * different compilers (remember that core needs to to build
3587 * also with c++) and compiler options:
3588 *
3589 * - casting the RHS to (void*) -- works in *some* places
3590 * - casting the LHS to (void*) -- totally unportable
3591 *
3592 * So let's try silencing the warning at least for gcc. */
7347ee54 3593 GCC_DIAG_IGNORE_STMT(-Wpointer-sign);
d06fc7d4 3594 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
7347ee54 3595 GCC_DIAG_RESTORE_STMT;
9e353e3b 3596#ifdef STDIO_PTR_LVAL_SETS_CNT
f8a4dbc5 3597 assert(PerlSIO_get_cnt(stdio) == (cnt));
9e353e3b
NIS		 3598#endif
3599#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3600 /*
71200d45 3601 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH		 3602 */
3603 return;
9e353e3b 3604#endif
22569500 3605#else /* STDIO_PTR_LVALUE */
14a5cf38 3606 PerlProc_abort();
22569500 3607#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH		 3608 }
3609 /*
71200d45 3610 * Now (or only) set cnt
14a5cf38 3611 */
9e353e3b 3612#ifdef STDIO_CNT_LVALUE
14a5cf38 3613 PerlSIO_set_cnt(stdio, cnt);
faf55891 3614#elif (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH		 3615 PerlSIO_set_ptr(stdio,
3616 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3617 cnt));
22569500 3618#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3619 PerlProc_abort();
22569500 3620#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS		 3621}
3622
93679785 3623
9e353e3b
NIS		 3624#endif
3625
93679785
NIS		 3626IV
3627PerlIOStdio_fill(pTHX_ PerlIO *f)
3628{
abf9167d 3629 FILE * stdio;
93679785 3630 int c;
96a5add6 3631 PERL_UNUSED_CONTEXT;
abf9167d
DM		 3632 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3633 return -1;
3634 stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6 3635
93679785
NIS		 3636 /*
3637 * fflush()ing read-only streams can cause trouble on some stdio-s
3638 */
3639 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3640 if (PerlSIO_fflush(stdio) != 0)
3641 return EOF;
3642 }
f3be3723
BL		 3643 for (;;) {
3644 c = PerlSIO_fgetc(stdio);
3645 if (c != EOF)
3646 break;
3647 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3648 return EOF;
abf9167d
DM		 3649 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3650 return -1;
f3be3723
BL		 3651 SETERRNO(0,0);
3652 }
93679785
NIS		 3653
3654#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS		 3655
3656#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3657 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS		 3658 /* Fake ungetc() to the real buffer in case system's ungetc
3659 goes elsewhere
3660 */
3661 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3662 SSize_t cnt = PerlSIO_get_cnt(stdio);
3663 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3664 if (ptr == base+1) {
3665 *--ptr = (STDCHAR) c;
3666 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3667 if (PerlSIO_feof(stdio))
3668 PerlSIO_clearerr(stdio);
3669 return 0;
3670 }
3671 }
313e59c8
NIS		 3672 else
3673#endif
3674 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS		 3675 STDCHAR ch = c;
3676 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3677 return 0;
3678 }
3679 }
93679785
NIS		 3680#endif
3681
93679785 3682 /* If buffer snoop scheme above fails fall back to
9f7cd136 3683 using ungetc().
93679785
NIS		 3684 */
3685 if (PerlSIO_ungetc(c, stdio) != c)
3686 return EOF;
5876737a 3687
93679785
NIS		 3688 return 0;
3689}
3690
3691
3692
27da23d5 3693PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3694 sizeof(PerlIO_funcs),
14a5cf38
JH		 3695 "stdio",
3696 sizeof(PerlIOStdio),
86e05cf2 3697 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3698 PerlIOStdio_pushed,
2376d97d 3699 PerlIOBase_popped,
14a5cf38 3700 PerlIOStdio_open,
86e05cf2 3701 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 3702 NULL,
3703 PerlIOStdio_fileno,
71200d45 3704 PerlIOStdio_dup,
14a5cf38
JH		 3705 PerlIOStdio_read,
3706 PerlIOStdio_unread,
3707 PerlIOStdio_write,
3708 PerlIOStdio_seek,
3709 PerlIOStdio_tell,
3710 PerlIOStdio_close,
3711 PerlIOStdio_flush,
3712 PerlIOStdio_fill,
3713 PerlIOStdio_eof,
3714 PerlIOStdio_error,
3715 PerlIOStdio_clearerr,
3716 PerlIOStdio_setlinebuf,
9e353e3b 3717#ifdef FILE_base
14a5cf38
JH		 3718 PerlIOStdio_get_base,
3719 PerlIOStdio_get_bufsiz,
9e353e3b 3720#else
14a5cf38
JH		 3721 NULL,
3722 NULL,
9e353e3b
NIS		 3723#endif
3724#ifdef USE_STDIO_PTR
14a5cf38
JH		 3725 PerlIOStdio_get_ptr,
3726 PerlIOStdio_get_cnt,
15b61c98 3727# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3728 PerlIOStdio_set_ptrcnt,
15b61c98
JH		 3729# else
3730 NULL,
3731# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3732#else
3733 NULL,
14a5cf38
JH		 3734 NULL,
3735 NULL,
15b61c98 3736#endif /* USE_STDIO_PTR */
9e353e3b
NIS		 3737};
3738
b9d6bf13
JH		 3739/* Note that calls to PerlIO_exportFILE() are reversed using
3740 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3741FILE *
81428673 3742PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3743{
e87a358a 3744 dTHX;
81428673
NIS		 3745 FILE *stdio = NULL;
3746 if (PerlIOValid(f)) {
3747 char buf[8];
375ed12a
JH		 3748 int fd = PerlIO_fileno(f);
3749 if (fd < 0) {
3750 return NULL;
3751 }
81428673
NIS		 3752 PerlIO_flush(f);
3753 if (!mode || !*mode) {
3754 mode = PerlIO_modestr(f, buf);
3755 }
3756 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3757 if (stdio) {
3758 PerlIOl *l = *f;
9f75cc58 3759 PerlIO *f2;
81428673
NIS		 3760 /* De-link any lower layers so new :stdio sticks */
3761 *f = NULL;
a0714e2c 3762 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
9f75cc58 3763 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673 3764 s->stdio = stdio;
6b54a403 3765 PerlIOUnix_refcnt_inc(fileno(stdio));
81428673
NIS		 3766 /* Link previous lower layers under new one */
3767 *PerlIONext(f) = l;
3768 }
3769 else {
3770 /* restore layers list */
3771 *f = l;
3772 }
a33cf58c 3773 }
14a5cf38
JH		 3774 }
3775 return stdio;
9e353e3b
NIS		 3776}
3777
81428673 3778
9e353e3b
NIS		 3779FILE *
3780PerlIO_findFILE(PerlIO *f)
3781{
14a5cf38 3782 PerlIOl *l = *f;
bbbc33d0 3783 FILE *stdio;
14a5cf38
JH		 3784 while (l) {
3785 if (l->tab == &PerlIO_stdio) {
3786 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3787 return s->stdio;
3788 }
3789 l = *PerlIONext(&l);
f7e7eb72 3790 }
4b069b44 3791 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
bbbc33d0
NC		 3792 /* However, we're not really exporting a FILE * to someone else (who
3793 becomes responsible for closing it, or calling PerlIO_releaseFILE())
486ec47a 3794 So we need to undo its reference count increase on the underlying file
bbbc33d0
NC		 3795 descriptor. We have to do this, because if the loop above returns you
3796 the FILE *, then *it* didn't increase any reference count. So there's
3797 only one way to be consistent. */
3798 stdio = PerlIO_exportFILE(f, NULL);
3799 if (stdio) {
3800 const int fd = fileno(stdio);
3801 if (fd >= 0)
3802 PerlIOUnix_refcnt_dec(fd);
3803 }
3804 return stdio;
9e353e3b
NIS		 3805}
3806
b9d6bf13 3807/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS		 3808void
3809PerlIO_releaseFILE(PerlIO *p, FILE *f)
3810{
22569500
NIS		 3811 PerlIOl *l;
3812 while ((l = *p)) {
3813 if (l->tab == &PerlIO_stdio) {
3814 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2bcd6579 3815 if (s->stdio == f) { /* not in a loop */
6b54a403
NC		 3816 const int fd = fileno(f);
3817 if (fd >= 0)
3818 PerlIOUnix_refcnt_dec(fd);
2bcd6579
DD		 3819 {
3820 dTHX;
3821 PerlIO_pop(aTHX_ p);
3822 }
22569500
NIS		 3823 return;
3824 }
3825 }
3826 p = PerlIONext(p);
3827 }
3828 return;
9e353e3b
NIS		 3829}
3830
3831/*--------------------------------------------------------------------------------------*/
14a5cf38 3832/*
71200d45 3833 * perlio buffer layer
14a5cf38 3834 */
9e353e3b 3835
5e2ab84b 3836IV
2dc2558e 3837PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3838{
14a5cf38 3839 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
de009b76 3840 const int fd = PerlIO_fileno(f);
14a5cf38
JH		 3841 if (fd >= 0 && PerlLIO_isatty(fd)) {
3842 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3843 }
4b069b44 3844 if (*PerlIONext(f)) {
de009b76 3845 const Off_t posn = PerlIO_tell(PerlIONext(f));
4b069b44
NIS		 3846 if (posn != (Off_t) - 1) {
3847 b->posn = posn;
3848 }
14a5cf38 3849 }
2dc2558e 3850 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS		 3851}
3852
9e353e3b 3853PerlIO *
14a5cf38
JH		 3854PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3855 IV n, const char *mode, int fd, int imode, int perm,
3856 PerlIO *f, int narg, SV **args)
3857{
04892f78 3858 if (PerlIOValid(f)) {
14a5cf38 3859 PerlIO *next = PerlIONext(f);
67363c0d
JH		 3860 PerlIO_funcs *tab =
3861 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3862 if (tab && tab->Open)
3863 next =
3864 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3865 next, narg, args);
2dc2558e 3866 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH		 3867 return NULL;
3868 }
3869 }
3870 else {
04892f78 3871 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
14a5cf38 3872 int init = 0;
3b6c1aba 3873 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH		 3874 init = 1;
3875 /*
71200d45 3876 * mode++;
14a5cf38
JH		 3877 */
3878 }
67363c0d
JH		 3879 if (tab && tab->Open)
3880 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3881 f, narg, args);
3882 else
3883 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 3884 if (f) {
22569500 3885 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
b26b1ab5
NC		 3886 /*
3887 * if push fails during open, open fails. close will pop us.
3888 */
3889 PerlIO_close (f);
3890 return NULL;
3891 } else {
3892 fd = PerlIO_fileno(f);
b26b1ab5
NC		 3893 if (init && fd == 2) {
3894 /*
3895 * Initial stderr is unbuffered
3896 */
3897 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3898 }
23b84778
IZ		 3899#ifdef PERLIO_USING_CRLF
3900# ifdef PERLIO_IS_BINMODE_FD
3901 if (PERLIO_IS_BINMODE_FD(fd))
bd61b366 3902 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
23b84778
IZ		 3903 else
3904# endif
3905 /*
3906 * do something about failing setmode()? --jhi
3907 */
3908 PerlLIO_setmode(fd, O_BINARY);
3909#endif
8c8488cd 3910#ifdef VMS
8c8488cd
CB		 3911 /* Enable line buffering with record-oriented regular files
3912 * so we don't introduce an extraneous record boundary when
3913 * the buffer fills up.
3914 */
3915 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3916 Stat_t st;
3917 if (PerlLIO_fstat(fd, &st) == 0
3918 && S_ISREG(st.st_mode)
3919 && (st.st_fab_rfm == FAB$C_VAR
3920 || st.st_fab_rfm == FAB$C_VFC)) {
3921 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
3922 }
3923 }
3924#endif
14a5cf38
JH		 3925 }
3926 }
ee518936 3927 }
14a5cf38 3928 return f;
9e353e3b
NIS		 3929}
3930
14a5cf38
JH		 3931/*
3932 * This "flush" is akin to sfio's sync in that it handles files in either
93c2c2ec
IZ		 3933 * read or write state. For write state, we put the postponed data through
3934 * the next layers. For read state, we seek() the next layers to the
3935 * offset given by current position in the buffer, and discard the buffer
3936 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3937 * in any case?). Then the pass the stick further in chain.
14a5cf38 3938 */
9e353e3b 3939IV
f62ce20a 3940PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 3941{
dcda55fc 3942 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38 3943 int code = 0;
04892f78 3944 PerlIO *n = PerlIONext(f);
14a5cf38
JH		 3945 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3946 /*
71200d45 3947 * write() the buffer
14a5cf38 3948 */
de009b76
AL		 3949 const STDCHAR *buf = b->buf;
3950 const STDCHAR *p = buf;
14a5cf38
JH		 3951 while (p < b->ptr) {
3952 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3953 if (count > 0) {
3954 p += count;
3955 }
3956 else if (count < 0 || PerlIO_error(n)) {
3957 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
0ea86a10 3958 PerlIO_save_errno(f);
14a5cf38
JH		 3959 code = -1;
3960 break;
3961 }
3962 }
3963 b->posn += (p - buf);
3964 }
3965 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3966 STDCHAR *buf = PerlIO_get_base(f);
3967 /*
71200d45 3968 * Note position change
14a5cf38
JH		 3969 */
3970 b->posn += (b->ptr - buf);
3971 if (b->ptr < b->end) {
4b069b44
NIS		 3972 /* We did not consume all of it - try and seek downstream to
3973 our logical position
14a5cf38 3974 */
4b069b44 3975 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
04892f78
NIS		 3976 /* Reload n as some layers may pop themselves on seek */
3977 b->posn = PerlIO_tell(n = PerlIONext(f));
14a5cf38 3978 }
ba5c3fe9 3979 else {
4b069b44
NIS		 3980 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3981 data is lost for good - so return saying "ok" having undone
3982 the position adjust
3983 */
3984 b->posn -= (b->ptr - buf);
ba5c3fe9
NIS		 3985 return code;
3986 }
14a5cf38
JH		 3987 }
3988 }
3989 b->ptr = b->end = b->buf;
3990 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
04892f78 3991 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
04892f78 3992 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
14a5cf38
JH		 3993 code = -1;
3994 return code;
6f9d8c32
NIS		 3995}
3996
93c2c2ec
IZ		 3997/* This discards the content of the buffer after b->ptr, and rereads
3998 * the buffer from the position off in the layer downstream; here off
3999 * is at offset corresponding to b->ptr - b->buf.
4000 */
06da4f11 4001IV
f62ce20a 4002PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 4003{
dcda55fc 4004 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4005 PerlIO *n = PerlIONext(f);
4006 SSize_t avail;
4007 /*
4b069b44
NIS		 4008 * Down-stream flush is defined not to loose read data so is harmless.
4009 * we would not normally be fill'ing if there was data left in anycase.
14a5cf38 4010 */
93c2c2ec 4011 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
14a5cf38
JH		 4012 return -1;
4013 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 4014 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH		 4015
4016 if (!b->buf)
22569500 4017 PerlIO_get_base(f); /* allocate via vtable */
14a5cf38 4018
0f0eef27 4019 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
ec6fa4f0 4020
14a5cf38 4021 b->ptr = b->end = b->buf;
4b069b44
NIS		 4022
4023 if (!PerlIOValid(n)) {
4024 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4025 return -1;
4026 }
4027
14a5cf38
JH		 4028 if (PerlIO_fast_gets(n)) {
4029 /*
04892f78 4030 * Layer below is also buffered. We do _NOT_ want to call its
14a5cf38
JH		 4031 * ->Read() because that will loop till it gets what we asked for
4032 * which may hang on a pipe etc. Instead take anything it has to
71200d45 4033 * hand, or ask it to fill _once_.
14a5cf38
JH		 4034 */
4035 avail = PerlIO_get_cnt(n);
4036 if (avail <= 0) {
4037 avail = PerlIO_fill(n);
4038 if (avail == 0)
4039 avail = PerlIO_get_cnt(n);
4040 else {
4041 if (!PerlIO_error(n) && PerlIO_eof(n))
4042 avail = 0;
4043 }
4044 }
4045 if (avail > 0) {
4046 STDCHAR *ptr = PerlIO_get_ptr(n);
dcda55fc 4047 const SSize_t cnt = avail;
eb160463 4048 if (avail > (SSize_t)b->bufsiz)
14a5cf38
JH		 4049 avail = b->bufsiz;
4050 Copy(ptr, b->buf, avail, STDCHAR);
4051 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
4052 }
4053 }
4054 else {
4055 avail = PerlIO_read(n, b->ptr, b->bufsiz);
4056 }
4057 if (avail <= 0) {
4058 if (avail == 0)
4059 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4060 else
0ea86a10 4061 {
14a5cf38 4062 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
0ea86a10
FC		 4063 PerlIO_save_errno(f);
4064 }
14a5cf38
JH		 4065 return -1;
4066 }
4067 b->end = b->buf + avail;
4068 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4069 return 0;
06da4f11
NIS		 4070}
4071
6f9d8c32 4072SSize_t
f62ce20a 4073PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 4074{
04892f78 4075 if (PerlIOValid(f)) {
dcda55fc 4076 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4077 if (!b->ptr)
4078 PerlIO_get_base(f);
f62ce20a 4079 return PerlIOBase_read(aTHX_ f, vbuf, count);
14a5cf38
JH		 4080 }
4081 return 0;
6f9d8c32
NIS		 4082}
4083
9e353e3b 4084SSize_t
f62ce20a 4085PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 4086{
14a5cf38 4087 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
dcda55fc 4088 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4089 SSize_t unread = 0;
4090 SSize_t avail;
4091 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4092 PerlIO_flush(f);
4093 if (!b->buf)
4094 PerlIO_get_base(f);
4095 if (b->buf) {
4096 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4097 /*
4098 * Buffer is already a read buffer, we can overwrite any chars
71200d45 4099 * which have been read back to buffer start
14a5cf38
JH		 4100 */
4101 avail = (b->ptr - b->buf);
4102 }
4103 else {
4104 /*
4105 * Buffer is idle, set it up so whole buffer is available for
71200d45 4106 * unread
14a5cf38
JH		 4107 */
4108 avail = b->bufsiz;
4109 b->end = b->buf + avail;
4110 b->ptr = b->end;
4111 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4112 /*
71200d45 4113 * Buffer extends _back_ from where we are now
14a5cf38
JH		 4114 */
4115 b->posn -= b->bufsiz;
4116 }
94e529cc 4117 if ((SSize_t) count >= 0 && avail > (SSize_t) count) {
14a5cf38 4118 /*
71200d45 4119 * If we have space for more than count, just move count
14a5cf38
JH		 4120 */
4121 avail = count;
4122 }
4123 if (avail > 0) {
4124 b->ptr -= avail;
4125 buf -= avail;
4126 /*
4127 * In simple stdio-like ungetc() case chars will be already
71200d45 4128 * there
14a5cf38
JH		 4129 */
4130 if (buf != b->ptr) {
4131 Copy(buf, b->ptr, avail, STDCHAR);
4132 }
4133 count -= avail;
4134 unread += avail;
4135 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4136 }
4137 }
93679785
NIS		 4138 if (count > 0) {
4139 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
4140 }
14a5cf38 4141 return unread;
760ac839
LW		 4142}
4143
9e353e3b 4144SSize_t
f62ce20a 4145PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 4146{
de009b76 4147 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38 4148 const STDCHAR *buf = (const STDCHAR *) vbuf;
ee56a6b9 4149 const STDCHAR *flushptr = buf;
14a5cf38
JH		 4150 Size_t written = 0;
4151 if (!b->buf)
4152 PerlIO_get_base(f);
4153 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4154 return 0;
0678cb22
NIS		 4155 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4156 if (PerlIO_flush(f) != 0) {
4157 return 0;
4158 }
4159 }
ee56a6b9
CS		 4160 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4161 flushptr = buf + count;
4162 while (flushptr > buf && *(flushptr - 1) != '\n')
4163 --flushptr;
4164 }
14a5cf38
JH		 4165 while (count > 0) {
4166 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
94e529cc 4167 if ((SSize_t) count >= 0 && (SSize_t) count < avail)
14a5cf38 4168 avail = count;
ee56a6b9
CS		 4169 if (flushptr > buf && flushptr <= buf + avail)
4170 avail = flushptr - buf;
14a5cf38 4171 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
ee56a6b9
CS		 4172 if (avail) {
4173 Copy(buf, b->ptr, avail, STDCHAR);
4174 count -= avail;
4175 buf += avail;
4176 written += avail;
4177 b->ptr += avail;
4178 if (buf == flushptr)
4179 PerlIO_flush(f);
14a5cf38
JH		 4180 }
4181 if (b->ptr >= (b->buf + b->bufsiz))
abf9167d
DM		 4182 if (PerlIO_flush(f) == -1)
4183 return -1;
14a5cf38
JH		 4184 }
4185 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4186 PerlIO_flush(f);
4187 return written;
9e353e3b
NIS		 4188}
4189
94a175e1 4190IV
f62ce20a 4191PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 4192{
14a5cf38
JH		 4193 IV code;
4194 if ((code = PerlIO_flush(f)) == 0) {
14a5cf38
JH		 4195 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4196 code = PerlIO_seek(PerlIONext(f), offset, whence);
4197 if (code == 0) {
de009b76 4198 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4199 b->posn = PerlIO_tell(PerlIONext(f));
4200 }
9e353e3b 4201 }
14a5cf38 4202 return code;
9e353e3b
NIS		 4203}
4204
4205Off_t
f62ce20a 4206PerlIOBuf_tell(pTHX_ PerlIO *f)
9e353e3b 4207{
dcda55fc 4208 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38 4209 /*
71200d45 4210 * b->posn is file position where b->buf was read, or will be written
14a5cf38
JH		 4211 */
4212 Off_t posn = b->posn;
37725cdc 4213 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
0678cb22
NIS		 4214 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4215#if 1
4216 /* As O_APPEND files are normally shared in some sense it is better
4217 to flush :
4218 */
4219 PerlIO_flush(f);
4220#else
37725cdc 4221 /* when file is NOT shared then this is sufficient */
0678cb22
NIS		 4222 PerlIO_seek(PerlIONext(f),0, SEEK_END);
4223#endif
4224 posn = b->posn = PerlIO_tell(PerlIONext(f));
4225 }
14a5cf38
JH		 4226 if (b->buf) {
4227 /*
71200d45 4228 * If buffer is valid adjust position by amount in buffer
14a5cf38
JH		 4229 */
4230 posn += (b->ptr - b->buf);
4231 }
4232 return posn;
9e353e3b
NIS		 4233}
4234
4235IV
44798d05
NIS		 4236PerlIOBuf_popped(pTHX_ PerlIO *f)
4237{
de009b76
AL		 4238 const IV code = PerlIOBase_popped(aTHX_ f);
4239 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
44798d05
NIS		 4240 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4241 Safefree(b->buf);
4242 }
dcda55fc 4243 b->ptr = b->end = b->buf = NULL;
44798d05
NIS		 4244 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4245 return code;
4246}
4247
4248IV
f62ce20a 4249PerlIOBuf_close(pTHX_ PerlIO *f)
9e353e3b 4250{
de009b76
AL		 4251 const IV code = PerlIOBase_close(aTHX_ f);
4252 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38 4253 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 4254 Safefree(b->buf);
14a5cf38 4255 }
dcda55fc 4256 b->ptr = b->end = b->buf = NULL;
14a5cf38
JH		 4257 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4258 return code;
760ac839
LW		 4259}
4260
9e353e3b 4261STDCHAR *
f62ce20a 4262PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
9e353e3b 4263{
dcda55fc 4264 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4265 if (!b->buf)
4266 PerlIO_get_base(f);
4267 return b->ptr;
9e353e3b
NIS		 4268}
4269
05d1247b 4270SSize_t
f62ce20a 4271PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
9e353e3b 4272{
dcda55fc 4273 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4274 if (!b->buf)
4275 PerlIO_get_base(f);
4276 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4277 return (b->end - b->ptr);
4278 return 0;
9e353e3b
NIS		 4279}
4280
4281STDCHAR *
f62ce20a 4282PerlIOBuf_get_base(pTHX_ PerlIO *f)
9e353e3b 4283{
dcda55fc 4284 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
96a5add6
AL		 4285 PERL_UNUSED_CONTEXT;
4286
14a5cf38
JH		 4287 if (!b->buf) {
4288 if (!b->bufsiz)
1810cd7c 4289 b->bufsiz = PERLIOBUF_DEFAULT_BUFSIZ;
d09f14bf 4290 Newx(b->buf,b->bufsiz, STDCHAR);
14a5cf38
JH		 4291 if (!b->buf) {
4292 b->buf = (STDCHAR *) & b->oneword;
4293 b->bufsiz = sizeof(b->oneword);
4294 }
dcda55fc 4295 b->end = b->ptr = b->buf;
06da4f11 4296 }
14a5cf38 4297 return b->buf;
9e353e3b
NIS		 4298}
4299
4300Size_t
f62ce20a 4301PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
9e353e3b 4302{
dcda55fc 4303 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4304 if (!b->buf)
4305 PerlIO_get_base(f);
4306 return (b->end - b->buf);
9e353e3b
NIS		 4307}
4308
4309void
f62ce20a 4310PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 4311{
dcda55fc 4312 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
babfacb9
JH		 4313#ifndef DEBUGGING
4314 PERL_UNUSED_ARG(cnt);
4315#endif
14a5cf38
JH		 4316 if (!b->buf)
4317 PerlIO_get_base(f);
4318 b->ptr = ptr;
b727803b
RGS		 4319 assert(PerlIO_get_cnt(f) == cnt);
4320 assert(b->ptr >= b->buf);
14a5cf38 4321 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
760ac839
LW		 4322}
4323
71200d45 4324PerlIO *
ecdeb87c 4325PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 4326{
ecdeb87c 4327 return PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS		 4328}
4329
4330
4331
27da23d5 4332PERLIO_FUNCS_DECL(PerlIO_perlio) = {
2dc2558e 4333 sizeof(PerlIO_funcs),
14a5cf38
JH		 4334 "perlio",
4335 sizeof(PerlIOBuf),
86e05cf2 4336 PERLIO_K_BUFFERED|PERLIO_K_RAW,
14a5cf38 4337 PerlIOBuf_pushed,
44798d05 4338 PerlIOBuf_popped,
14a5cf38 4339 PerlIOBuf_open,
86e05cf2 4340 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 4341 NULL,
4342 PerlIOBase_fileno,
71200d45 4343 PerlIOBuf_dup,
14a5cf38
JH		 4344 PerlIOBuf_read,
4345 PerlIOBuf_unread,
4346 PerlIOBuf_write,
4347 PerlIOBuf_seek,
4348 PerlIOBuf_tell,
4349 PerlIOBuf_close,
4350 PerlIOBuf_flush,
4351 PerlIOBuf_fill,
4352 PerlIOBase_eof,
4353 PerlIOBase_error,
4354 PerlIOBase_clearerr,
4355 PerlIOBase_setlinebuf,
4356 PerlIOBuf_get_base,
4357 PerlIOBuf_bufsiz,
4358 PerlIOBuf_get_ptr,
4359 PerlIOBuf_get_cnt,
4360 PerlIOBuf_set_ptrcnt,
9e353e3b
NIS		 4361};
4362
66ecd56b 4363/*--------------------------------------------------------------------------------------*/
14a5cf38 4364/*
71200d45 4365 * Temp layer to hold unread chars when cannot do it any other way
14a5cf38 4366 */
5e2ab84b
NIS		 4367
4368IV
f62ce20a 4369PerlIOPending_fill(pTHX_ PerlIO *f)
5e2ab84b 4370{
14a5cf38 4371 /*
71200d45 4372 * Should never happen
14a5cf38
JH		 4373 */
4374 PerlIO_flush(f);
4375 return 0;
5e2ab84b
NIS		 4376}
4377
4378IV
f62ce20a 4379PerlIOPending_close(pTHX_ PerlIO *f)
5e2ab84b 4380{
14a5cf38 4381 /*
71200d45 4382 * A tad tricky - flush pops us, then we close new top
14a5cf38
JH		 4383 */
4384 PerlIO_flush(f);
4385 return PerlIO_close(f);
5e2ab84b
NIS		 4386}
4387
94a175e1 4388IV
f62ce20a 4389PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
5e2ab84b 4390{
14a5cf38 4391 /*
71200d45 4392 * A tad tricky - flush pops us, then we seek new top
14a5cf38
JH		 4393 */
4394 PerlIO_flush(f);
4395 return PerlIO_seek(f, offset, whence);
5e2ab84b
NIS		 4396}
4397
4398
4399IV
f62ce20a 4400PerlIOPending_flush(pTHX_ PerlIO *f)
5e2ab84b 4401{
dcda55fc 4402 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38 4403 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3a1ee7e8 4404 Safefree(b->buf);
14a5cf38
JH		 4405 b->buf = NULL;
4406 }
4407 PerlIO_pop(aTHX_ f);
4408 return 0;
5e2ab84b
NIS		 4409}
4410
4411void
f62ce20a 4412PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
5e2ab84b 4413{
14a5cf38
JH		 4414 if (cnt <= 0) {
4415 PerlIO_flush(f);
4416 }
4417 else {
f62ce20a 4418 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
14a5cf38 4419 }
5e2ab84b
NIS		 4420}
4421
4422IV
2dc2558e 4423PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 4424{
de009b76 4425 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
dcda55fc 4426 PerlIOl * const l = PerlIOBase(f);
14a5cf38 4427 /*
71200d45
NIS		 4428 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4429 * etc. get muddled when it changes mid-string when we auto-pop.
14a5cf38
JH		 4430 */
4431 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4432 (PerlIOBase(PerlIONext(f))->
4433 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4434 return code;
5e2ab84b
NIS		 4435}
4436
4437SSize_t
f62ce20a 4438PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
5e2ab84b 4439{
14a5cf38
JH		 4440 SSize_t avail = PerlIO_get_cnt(f);
4441 SSize_t got = 0;
94e529cc 4442 if ((SSize_t) count >= 0 && (SSize_t)count < avail)
14a5cf38
JH		 4443 avail = count;
4444 if (avail > 0)
f62ce20a 4445 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
eb160463 4446 if (got >= 0 && got < (SSize_t)count) {
de009b76 4447 const SSize_t more =
14a5cf38
JH		 4448 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4449 if (more >= 0 || got == 0)
4450 got += more;
4451 }
4452 return got;
5e2ab84b
NIS		 4453}
4454
27da23d5 4455PERLIO_FUNCS_DECL(PerlIO_pending) = {
2dc2558e 4456 sizeof(PerlIO_funcs),
14a5cf38
JH		 4457 "pending",
4458 sizeof(PerlIOBuf),
86e05cf2 4459 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
14a5cf38 4460 PerlIOPending_pushed,
44798d05 4461 PerlIOBuf_popped,
14a5cf38 4462 NULL,
86e05cf2 4463 PerlIOBase_binmode, /* binmode */
14a5cf38
JH		 4464 NULL,
4465 PerlIOBase_fileno,
71200d45 4466 PerlIOBuf_dup,
14a5cf38
JH		 4467 PerlIOPending_read,
4468 PerlIOBuf_unread,
4469 PerlIOBuf_write,
4470 PerlIOPending_seek,
4471 PerlIOBuf_tell,
4472 PerlIOPending_close,
4473 PerlIOPending_flush,
4474 PerlIOPending_fill,
4475 PerlIOBase_eof,
4476 PerlIOBase_error,
4477 PerlIOBase_clearerr,
4478 PerlIOBase_setlinebuf,
4479 PerlIOBuf_get_base,
4480 PerlIOBuf_bufsiz,
4481 PerlIOBuf_get_ptr,
4482 PerlIOBuf_get_cnt,
4483 PerlIOPending_set_ptrcnt,
5e2ab84b
NIS		 4484};
4485
4486
4487
4488/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 4489/*
4490 * crlf - translation On read translate CR,LF to "\n" we do this by
4491 * overriding ptr/cnt entries to hand back a line at a time and keeping a
71200d45 4492 * record of which nl we "lied" about. On write translate "\n" to CR,LF
93c2c2ec
IZ		 4493 *
4494 * c->nl points on the first byte of CR LF pair when it is temporarily
4495 * replaced by LF, or to the last CR of the buffer. In the former case
4496 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4497 * that it ends at c->nl; these two cases can be distinguished by
4498 * *c->nl. c->nl is set during _getcnt() call, and unset during
4499 * _unread() and _flush() calls.
4500 * It only matters for read operations.
66ecd56b
NIS		 4501 */
4502
14a5cf38 4503typedef struct {
22569500
NIS		 4504 PerlIOBuf base; /* PerlIOBuf stuff */
4505 STDCHAR *nl; /* Position of crlf we "lied" about in the
14a5cf38 4506 * buffer */
99efab12
NIS		 4507} PerlIOCrlf;
4508
ff1e3883
JD		 4509/* Inherit the PERLIO_F_UTF8 flag from previous layer.
4510 * Otherwise the :crlf layer would always revert back to
4511 * raw mode.
4512 */
4513static void
4514S_inherit_utf8_flag(PerlIO *f)
4515{
4516 PerlIO *g = PerlIONext(f);
4517 if (PerlIOValid(g)) {
4518 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4519 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4520 }
4521 }
4522}
4523
f5b9d040 4524IV
2dc2558e 4525PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
f5b9d040 4526{
14a5cf38
JH		 4527 IV code;
4528 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
2dc2558e 4529 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b 4530#if 0
e17bc05a 4531 DEBUG_i(
14a5cf38 4532 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
6c9570dc 4533 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
14a5cf38 4534 PerlIOBase(f)->flags);
e17bc05a 4535 );
5e2ab84b 4536#endif
8229d19f 4537 {
5da08ab0
LT		 4538 /* If the old top layer is a CRLF layer, reactivate it (if
4539 * necessary) and remove this new layer from the stack */
8229d19f 4540 PerlIO *g = PerlIONext(f);
7826b36f 4541 if (PerlIOValid(g)) {
8229d19f
JH		 4542 PerlIOl *b = PerlIOBase(g);
4543 if (b && b->tab == &PerlIO_crlf) {
4544 if (!(b->flags & PERLIO_F_CRLF))
4545 b->flags |= PERLIO_F_CRLF;
ff1e3883 4546 S_inherit_utf8_flag(g);
8229d19f
JH		 4547 PerlIO_pop(aTHX_ f);
4548 return code;
7826b36f 4549 }
8229d19f
JH		 4550 }
4551 }
ff1e3883 4552 S_inherit_utf8_flag(f);
14a5cf38 4553 return code;
f5b9d040
NIS		 4554}
4555
4556
99efab12 4557SSize_t
f62ce20a 4558PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 4559{
dcda55fc 4560 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
93c2c2ec 4561 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
76e6dc3a 4562 *(c->nl) = NATIVE_0xd;
14a5cf38
JH		 4563 c->nl = NULL;
4564 }
4565 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 4566 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
14a5cf38
JH		 4567 else {
4568 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4569 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4570 SSize_t unread = 0;
4571 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4572 PerlIO_flush(f);
4573 if (!b->buf)
4574 PerlIO_get_base(f);
4575 if (b->buf) {
4576 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4577 b->end = b->ptr = b->buf + b->bufsiz;
4578 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4579 b->posn -= b->bufsiz;
4580 }
4581 while (count > 0 && b->ptr > b->buf) {
dcda55fc 4582 const int ch = *--buf;
14a5cf38
JH		 4583 if (ch == '\n') {
4584 if (b->ptr - 2 >= b->buf) {
76e6dc3a
KW		 4585 *--(b->ptr) = NATIVE_0xa;
4586 *--(b->ptr) = NATIVE_0xd;
14a5cf38
JH		 4587 unread++;
4588 count--;
4589 }
4590 else {
93c2c2ec 4591 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
76e6dc3a
KW		 4592 *--(b->ptr) = NATIVE_0xa; /* Works even if 0xa ==
4593 '\r' */
93c2c2ec
IZ		 4594 unread++;
4595 count--;
14a5cf38
JH		 4596 }
4597 }
4598 else {
4599 *--(b->ptr) = ch;
4600 unread++;
4601 count--;
4602 }
4603 }
4604 }
ec1da995
LT		 4605 if (count > 0)
4606 unread += PerlIOBase_unread(aTHX_ f, (const STDCHAR *) vbuf + unread, count);
14a5cf38
JH		 4607 return unread;
4608 }
99efab12
NIS		 4609}
4610
93c2c2ec 4611/* XXXX This code assumes that buffer size >=2, but does not check it... */
99efab12 4612SSize_t
f62ce20a 4613PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
99efab12 4614{
dcda55fc 4615 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38
JH		 4616 if (!b->buf)
4617 PerlIO_get_base(f);
4618 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
dcda55fc 4619 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
76e6dc3a 4620 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == NATIVE_0xd)) {
23b3c6af 4621 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
14a5cf38 4622 scan:
76e6dc3a 4623 while (nl < b->end && *nl != NATIVE_0xd)
14a5cf38 4624 nl++;
76e6dc3a 4625 if (nl < b->end && *nl == NATIVE_0xd) {
14a5cf38
JH		 4626 test:
4627 if (nl + 1 < b->end) {
76e6dc3a 4628 if (nl[1] == NATIVE_0xa) {
14a5cf38
JH		 4629 *nl = '\n';
4630 c->nl = nl;
4631 }
4632 else {
4633 /*
71200d45 4634 * Not CR,LF but just CR
14a5cf38
JH		 4635 */
4636 nl++;
4637 goto scan;
4638 }
4639 }
4640 else {
4641 /*
71200d45 4642 * Blast - found CR as last char in buffer
14a5cf38 4643 */
e87a358a 4644
14a5cf38
JH		 4645 if (b->ptr < nl) {
4646 /*
4647 * They may not care, defer work as long as
71200d45 4648 * possible
14a5cf38 4649 */
a0d1d361 4650 c->nl = nl;
14a5cf38
JH		 4651 return (nl - b->ptr);
4652 }
4653 else {
4654 int code;
22569500 4655 b->ptr++; /* say we have read it as far as
14a5cf38 4656 * flush() is concerned */
22569500 4657 b->buf++; /* Leave space in front of buffer */
e949e37c
NIS		 4658 /* Note as we have moved buf up flush's
4659 posn += ptr-buf
4660 will naturally make posn point at CR
4661 */
22569500
NIS		 4662 b->bufsiz--; /* Buffer is thus smaller */
4663 code = PerlIO_fill(f); /* Fetch some more */
4664 b->bufsiz++; /* Restore size for next time */
4665 b->buf--; /* Point at space */
4666 b->ptr = nl = b->buf; /* Which is what we hand
14a5cf38 4667 * off */
76e6dc3a 4668 *nl = NATIVE_0xd; /* Fill in the CR */
14a5cf38 4669 if (code == 0)
22569500 4670 goto test; /* fill() call worked */
14a5cf38 4671 /*
71200d45 4672 * CR at EOF - just fall through
14a5cf38 4673 */
a0d1d361 4674 /* Should we clear EOF though ??? */
14a5cf38
JH		 4675 }
4676 }
4677 }
4678 }
4679 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4680 }
4681 return 0;
99efab12
NIS		 4682}
4683
4684void
f62ce20a 4685PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
14a5cf38 4686{
dcda55fc
AL		 4687 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4688 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
14a5cf38
JH		 4689 if (!b->buf)
4690 PerlIO_get_base(f);
4691 if (!ptr) {
a0d1d361 4692 if (c->nl) {
14a5cf38 4693 ptr = c->nl + 1;
76e6dc3a 4694 if (ptr == b->end && *c->nl == NATIVE_0xd) {
486ec47a 4695 /* Deferred CR at end of buffer case - we lied about count */
22569500
NIS		 4696 ptr--;
4697 }
4698 }
14a5cf38
JH		 4699 else {
4700 ptr = b->end;
14a5cf38
JH		 4701 }
4702 ptr -= cnt;
4703 }
4704 else {
6f207bd3 4705 NOOP;
3b4bd3fd 4706#if 0
14a5cf38 4707 /*
71200d45 4708 * Test code - delete when it works ...
14a5cf38 4709 */
3b4bd3fd 4710 IV flags = PerlIOBase(f)->flags;
ba7abf9d 4711 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
76e6dc3a 4712 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == NATIVE_0xd) {
486ec47a 4713 /* Deferred CR at end of buffer case - we lied about count */
a0d1d361 4714 chk--;
22569500 4715 }
14a5cf38
JH		 4716 chk -= cnt;
4717
a0d1d361 4718 if (ptr != chk ) {
99ef548b 4719 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
6c9570dc
MHM		 4720 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4721 flags, c->nl, b->end, cnt);
14a5cf38 4722 }
99ef548b 4723#endif
14a5cf38
JH		 4724 }
4725 if (c->nl) {
4726 if (ptr > c->nl) {
4727 /*
71200d45 4728 * They have taken what we lied about
14a5cf38 4729 */
76e6dc3a 4730 *(c->nl) = NATIVE_0xd;
14a5cf38
JH		 4731 c->nl = NULL;
4732 ptr++;
4733 }
4734 }
4735 b->ptr = ptr;
4736 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
99efab12
NIS		 4737}
4738
4739SSize_t
f62ce20a 4740PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
99efab12 4741{
14a5cf38 4742 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
f62ce20a 4743 return PerlIOBuf_write(aTHX_ f, vbuf, count);
14a5cf38 4744 else {
dcda55fc 4745 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
14a5cf38 4746 const STDCHAR *buf = (const STDCHAR *) vbuf;
dcda55fc 4747 const STDCHAR * const ebuf = buf + count;
14a5cf38
JH		 4748 if (!b->buf)
4749 PerlIO_get_base(f);
4750 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4751 return 0;
4752 while (buf < ebuf) {
dcda55fc 4753 const STDCHAR * const eptr = b->buf + b->bufsiz;
14a5cf38
JH		 4754 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4755 while (buf < ebuf && b->ptr < eptr) {
4756 if (*buf == '\n') {
4757 if ((b->ptr + 2) > eptr) {
4758 /*
71200d45 4759 * Not room for both
14a5cf38
JH		 4760 */
4761 PerlIO_flush(f);
4762 break;
4763 }
4764 else {
76e6dc3a
KW		 4765 *(b->ptr)++ = NATIVE_0xd; /* CR */
4766 *(b->ptr)++ = NATIVE_0xa; /* LF */
14a5cf38
JH		 4767 buf++;
4768 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4769 PerlIO_flush(f);
4770 break;
4771 }
4772 }
4773 }
4774 else {
dcda55fc 4775 *(b->ptr)++ = *buf++;
14a5cf38
JH		 4776 }
4777 if (b->ptr >= eptr) {
4778 PerlIO_flush(f);
4779 break;
4780 }
4781 }
4782 }
4783 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4784 PerlIO_flush(f);
4785 return (buf - (STDCHAR *) vbuf);
4786 }
99efab12
NIS		 4787}
4788
4789IV
f62ce20a 4790PerlIOCrlf_flush(pTHX_ PerlIO *f)
99efab12 4791{
dcda55fc 4792 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
14a5cf38 4793 if (c->nl) {
76e6dc3a 4794 *(c->nl) = NATIVE_0xd;
14a5cf38
JH		 4795 c->nl = NULL;
4796 }
f62ce20a 4797 return PerlIOBuf_flush(aTHX_ f);
99efab12
NIS		 4798}
4799
86e05cf2
NIS		 4800IV
4801PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4802{
4803 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4804 /* In text mode - flush any pending stuff and flip it */
4805 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4806#ifndef PERLIO_USING_CRLF
4807 /* CRLF is unusual case - if this is just the :crlf layer pop it */
5fae6dc1 4808 PerlIO_pop(aTHX_ f);
86e05cf2
NIS		 4809#endif
4810 }
dda4a477 4811 return PerlIOBase_binmode(aTHX_ f);
86e05cf2
NIS		 4812}
4813
27da23d5 4814PERLIO_FUNCS_DECL(PerlIO_crlf) = {
2dc2558e 4815 sizeof(PerlIO_funcs),
14a5cf38
JH		 4816 "crlf",
4817 sizeof(PerlIOCrlf),
86e05cf2 4818 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
14a5cf38 4819 PerlIOCrlf_pushed,
44798d05 4820 PerlIOBuf_popped, /* popped */
14a5cf38 4821 PerlIOBuf_open,
86e05cf2 4822 PerlIOCrlf_binmode, /* binmode */
14a5cf38
JH		 4823 NULL,
4824 PerlIOBase_fileno,
71200d45 4825 PerlIOBuf_dup,
de009b76 4826 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
22569500
NIS		 4827 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4828 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
14a5cf38
JH		 4829 PerlIOBuf_seek,
4830 PerlIOBuf_tell,
4831 PerlIOBuf_close,
4832 PerlIOCrlf_flush,
4833 PerlIOBuf_fill,
4834 PerlIOBase_eof,
4835 PerlIOBase_error,
4836 PerlIOBase_clearerr,
4837 PerlIOBase_setlinebuf,
4838 PerlIOBuf_get_base,
4839 PerlIOBuf_bufsiz,
4840 PerlIOBuf_get_ptr,
4841 PerlIOCrlf_get_cnt,
4842 PerlIOCrlf_set_ptrcnt,
66ecd56b
NIS		 4843};
4844
9e353e3b 4845PerlIO *
e87a358a 4846Perl_PerlIO_stdin(pTHX)
9e353e3b 4847{
a1ea730d 4848 if (!PL_perlio) {
14a5cf38
JH		 4849 PerlIO_stdstreams(aTHX);
4850 }
303f2dc3 4851 return (PerlIO*)&PL_perlio[1];
9e353e3b
NIS		 4852}
4853
9e353e3b 4854PerlIO *
e87a358a 4855Perl_PerlIO_stdout(pTHX)
9e353e3b 4856{
a1ea730d 4857 if (!PL_perlio) {
14a5cf38
JH		 4858 PerlIO_stdstreams(aTHX);
4859 }
303f2dc3 4860 return (PerlIO*)&PL_perlio[2];
9e353e3b
NIS		 4861}
4862
9e353e3b 4863PerlIO *
e87a358a 4864Perl_PerlIO_stderr(pTHX)
9e353e3b 4865{
a1ea730d 4866 if (!PL_perlio) {
14a5cf38
JH		 4867 PerlIO_stdstreams(aTHX);
4868 }
303f2dc3 4869 return (PerlIO*)&PL_perlio[3];
9e353e3b
NIS		 4870}
4871
4872/*--------------------------------------------------------------------------------------*/
4873
9e353e3b
NIS		 4874char *
4875PerlIO_getname(PerlIO *f, char *buf)
4876{
a15cef0c 4877#ifdef VMS
dbf7dff6 4878 dTHX;
73d840c0 4879 char *name = NULL;
7659f319 4880 bool exported = FALSE;
14a5cf38 4881 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
7659f319
CB		 4882 if (!stdio) {
4883 stdio = PerlIO_exportFILE(f,0);
4884 exported = TRUE;
4885 }
4886 if (stdio) {
14a5cf38 4887 name = fgetname(stdio, buf);
7659f319
CB		 4888 if (exported) PerlIO_releaseFILE(f,stdio);
4889 }
73d840c0 4890 return name;
a15cef0c 4891#else
8772537c
AL		 4892 PERL_UNUSED_ARG(f);
4893 PERL_UNUSED_ARG(buf);
dbf7dff6 4894 Perl_croak_nocontext("Don't know how to get file name");
bd61b366 4895 return NULL;
a15cef0c 4896#endif
9e353e3b
NIS		 4897}
4898
4899
4900/*--------------------------------------------------------------------------------------*/
14a5cf38
JH		 4901/*
4902 * Functions which can be called on any kind of PerlIO implemented in
71200d45 4903 * terms of above
14a5cf38 4904 */
9e353e3b 4905
e87a358a
NIS		 4906#undef PerlIO_fdopen
4907PerlIO *
4908PerlIO_fdopen(int fd, const char *mode)
4909{
4910 dTHX;
bd61b366 4911 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
e87a358a
NIS		 4912}
4913
4914#undef PerlIO_open
4915PerlIO *
4916PerlIO_open(const char *path, const char *mode)
4917{
4918 dTHX;
42d9b98d 4919 SV *name = sv_2mortal(newSVpv(path, 0));
bd61b366 4920 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
e87a358a
NIS		 4921}
4922
4923#undef Perlio_reopen
4924PerlIO *
4925PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4926{
4927 dTHX;
42d9b98d 4928 SV *name = sv_2mortal(newSVpv(path,0));
bd61b366 4929 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
e87a358a
NIS		 4930}
4931
9e353e3b 4932#undef PerlIO_getc
6f9d8c32 4933int
9e353e3b 4934PerlIO_getc(PerlIO *f)
760ac839 4935{
e87a358a 4936 dTHX;
14a5cf38 4937 STDCHAR buf[1];
de009b76 4938 if ( 1 == PerlIO_read(f, buf, 1) ) {
14a5cf38
JH		 4939 return (unsigned char) buf[0];
4940 }
4941 return EOF;
313ca112
NIS		 4942}
4943
4944#undef PerlIO_ungetc
4945int
4946PerlIO_ungetc(PerlIO *f, int ch)
4947{
e87a358a 4948 dTHX;
14a5cf38
JH		 4949 if (ch != EOF) {
4950 STDCHAR buf = ch;
4951 if (PerlIO_unread(f, &buf, 1) == 1)
4952 return ch;
4953 }
4954 return EOF;
760ac839
LW		 4955}
4956
9e353e3b
NIS		 4957#undef PerlIO_putc
4958int
4959PerlIO_putc(PerlIO *f, int ch)
760ac839 4960{
e87a358a 4961 dTHX;
14a5cf38
JH		 4962 STDCHAR buf = ch;
4963 return PerlIO_write(f, &buf, 1);
760ac839
LW		 4964}
4965
9e353e3b 4966#undef PerlIO_puts
760ac839 4967int
9e353e3b 4968PerlIO_puts(PerlIO *f, const char *s)
760ac839 4969{
e87a358a 4970 dTHX;
dcda55fc 4971 return PerlIO_write(f, s, strlen(s));
760ac839
LW		 4972}
4973
4974#undef PerlIO_rewind
4975void
c78749f2 4976PerlIO_rewind(PerlIO *f)
760ac839 4977{
e87a358a 4978 dTHX;
14a5cf38
JH		 4979 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4980 PerlIO_clearerr(f);
6f9d8c32
NIS		 4981}
4982
4983#undef PerlIO_vprintf
4984int
4985PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4986{
14a5cf38 4987 dTHX;
53ce71d3 4988 SV * sv;
b83604b4 4989 const char *s;
14a5cf38
JH		 4990 STRLEN len;
4991 SSize_t wrote;
2cc61e15 4992#ifdef NEED_VA_COPY
14a5cf38
JH		 4993 va_list apc;
4994 Perl_va_copy(ap, apc);
53ce71d3 4995 sv = vnewSVpvf(fmt, &apc);
d4825b27 4996 va_end(apc);
2cc61e15 4997#else
53ce71d3 4998 sv = vnewSVpvf(fmt, &ap);
2cc61e15 4999#endif
b83604b4 5000 s = SvPV_const(sv, len);
14a5cf38
JH		 5001 wrote = PerlIO_write(f, s, len);
5002 SvREFCNT_dec(sv);
5003 return wrote;
760ac839
LW		 5004}
5005
5006#undef PerlIO_printf
6f9d8c32 5007int
14a5cf38 5008PerlIO_printf(PerlIO *f, const char *fmt, ...)
760ac839 5009{
14a5cf38
JH		 5010 va_list ap;
5011 int result;
5012 va_start(ap, fmt);
5013 result = PerlIO_vprintf(f, fmt, ap);
5014 va_end(ap);
5015 return result;
760ac839
LW		 5016}
5017
5018#undef PerlIO_stdoutf
6f9d8c32 5019int
14a5cf38 5020PerlIO_stdoutf(const char *fmt, ...)
760ac839 5021{
e87a358a 5022 dTHX;
14a5cf38
JH		 5023 va_list ap;
5024 int result;
5025 va_start(ap, fmt);
5026 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5027 va_end(ap);
5028 return result;
760ac839
LW		 5029}
5030
5031#undef PerlIO_tmpfile
5032PerlIO *
c78749f2 5033PerlIO_tmpfile(void)
760ac839 5034{
ae73d7ec
TC		 5035 return PerlIO_tmpfile_flags(0);
5036}
5037
5038#define MKOSTEMP_MODES ( O_RDWR | O_CREAT | O_EXCL )
5039#define MKOSTEMP_MODE_MASK ( O_ACCMODE | O_CREAT | O_EXCL | O_TRUNC )
5040
5041PerlIO *
5042PerlIO_tmpfile_flags(int imode)
5043{
dbf7dff6 5044#ifndef WIN32
2941a2e1 5045 dTHX;
dbf7dff6 5046#endif
2941a2e1 5047 PerlIO *f = NULL;
2941a2e1 5048#ifdef WIN32
04247234 5049 const int fd = win32_tmpfd_mode(imode);
2941a2e1
JH		 5050 if (fd >= 0)
5051 f = PerlIO_fdopen(fd, "w+b");
74b421cc 5052#elif ! defined(OS2)
0b99e986
RGS		 5053 int fd = -1;
5054 char tempname[] = "/tmp/PerlIO_XXXXXX";
284167a5 5055 const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
525f6fe9 5056 SV * sv = NULL;
e57270be 5057 int old_umask = umask(0177);
ae73d7ec 5058 imode &= ~MKOSTEMP_MODE_MASK;
7299ca58 5059 if (tmpdir && *tmpdir) {
0b99e986 5060 /* if TMPDIR is set and not empty, we try that first */
7299ca58 5061 sv = newSVpv(tmpdir, 0);
0b99e986 5062 sv_catpv(sv, tempname + 4);
74b421cc 5063 fd = Perl_my_mkostemp_cloexec(SvPVX(sv), imode | O_VMS_DELETEONCLOSE);
0b99e986
RGS		 5064 }
5065 if (fd < 0) {
e40f8e80 5066 SvREFCNT_dec(sv);
7299ca58 5067 sv = NULL;
0b99e986 5068 /* else we try /tmp */
74b421cc 5069 fd = Perl_my_mkostemp_cloexec(tempname, imode | O_VMS_DELETEONCLOSE);
0b99e986 5070 }
b7561fc9
BF		 5071 if (fd < 0) {
5072 /* Try cwd */
5073 sv = newSVpvs(".");
5074 sv_catpv(sv, tempname + 4);
74b421cc 5075 fd = Perl_my_mkostemp_cloexec(SvPVX(sv), imode | O_VMS_DELETEONCLOSE);
b7561fc9 5076 }
60f7fc1e 5077 umask(old_umask);
2941a2e1 5078 if (fd >= 0) {
ae73d7ec
TC		 5079 /* fdopen() with a numeric mode */
5080 char mode[8];
5081 int writing = 1;
5082 (void)PerlIO_intmode2str(imode | MKOSTEMP_MODES, mode, &writing);
5083 f = PerlIO_fdopen(fd, mode);
2941a2e1
JH		 5084 if (f)
5085 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
74b421cc 5086# ifndef VMS
0b99e986 5087 PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
74b421cc 5088# endif
2941a2e1 5089 }
ef8d46e8 5090 SvREFCNT_dec(sv);
faf55891 5091#else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
c4420975 5092 FILE * const stdio = PerlSIO_tmpfile();
2941a2e1 5093
085e731f
CB		 5094 if (stdio)
5095 f = PerlIO_fdopen(fileno(stdio), "w+");
5096
2941a2e1
JH		 5097#endif /* else WIN32 */
5098 return f;
760ac839
LW		 5099}
5100
0ea86a10
FC		 5101void
5102Perl_PerlIO_save_errno(pTHX_ PerlIO *f)
5103{
e9b8343f 5104 PERL_UNUSED_CONTEXT;
0ea86a10
FC		 5105 if (!PerlIOValid(f))
5106 return;
5107 PerlIOBase(f)->err = errno;
5108#ifdef VMS
5109 PerlIOBase(f)->os_err = vaxc$errno;
5110#elif defined(OS2)
5111 PerlIOBase(f)->os_err = Perl_rc;
5112#elif defined(WIN32)
5113 PerlIOBase(f)->os_err = GetLastError();
5114#endif
5115}
5116
5117void
5118Perl_PerlIO_restore_errno(pTHX_ PerlIO *f)
5119{
e9b8343f 5120 PERL_UNUSED_CONTEXT;
0ea86a10
FC		 5121 if (!PerlIOValid(f))
5122 return;
5123 SETERRNO(PerlIOBase(f)->err, PerlIOBase(f)->os_err);
5124#ifdef OS2
5125 Perl_rc = PerlIOBase(f)->os_err);
5126#elif defined(WIN32)
5127 SetLastError(PerlIOBase(f)->os_err);
5128#endif
5129}
5130
6f9d8c32
NIS		 5131#undef HAS_FSETPOS
5132#undef HAS_FGETPOS
5133
760ac839 5134
9e353e3b 5135/*======================================================================================*/
14a5cf38 5136/*
71200d45
NIS		 5137 * Now some functions in terms of above which may be needed even if we are
5138 * not in true PerlIO mode
9e353e3b 5139 */
188f0c84
YO		 5140const char *
5141Perl_PerlIO_context_layers(pTHX_ const char *mode)
5142{
8b850bd5
NC		 5143 const char *direction = NULL;
5144 SV *layers;
188f0c84
YO		 5145 /*
5146 * Need to supply default layer info from open.pm
5147 */
8b850bd5
NC		 5148
5149 if (!PL_curcop)
5150 return NULL;
5151
5152 if (mode && mode[0] != 'r') {
5153 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
5154 direction = "open>";
5155 } else {
5156 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
5157 direction = "open<";
188f0c84 5158 }
8b850bd5
NC		 5159 if (!direction)
5160 return NULL;
5161
20439bc7 5162 layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
8b850bd5
NC		 5163
5164 assert(layers);
5165 return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;
188f0c84
YO		 5166}
5167
9e353e3b 5168
760ac839
LW		 5169#ifndef HAS_FSETPOS
5170#undef PerlIO_setpos
5171int
766a733e 5172PerlIO_setpos(PerlIO *f, SV *pos)
760ac839 5173{
14a5cf38 5174 if (SvOK(pos)) {
e1a83e70
DD		 5175 if (f) {
5176 dTHX;
5177 STRLEN len;
5178 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5179 if(len == sizeof(Off_t))
5180 return PerlIO_seek(f, *posn, SEEK_SET);
5181 }
14a5cf38 5182 }
93189314 5183 SETERRNO(EINVAL, SS_IVCHAN);
14a5cf38 5184 return -1;
760ac839 5185}
c411622e 5186#else
c411622e 5187#undef PerlIO_setpos
5188int
766a733e 5189PerlIO_setpos(PerlIO *f, SV *pos)
c411622e 5190{
14a5cf38 5191 if (SvOK(pos)) {
e1a83e70
DD		 5192 if (f) {
5193 dTHX;
5194 STRLEN len;
5195 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5196 if(len == sizeof(Fpos_t))
2d4389e4 5197#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
e1a83e70 5198 return fsetpos64(f, fpos);
d9b3e12d 5199#else
e1a83e70 5200 return fsetpos(f, fpos);
d9b3e12d 5201#endif
14a5cf38 5202 }
766a733e 5203 }
93189314 5204 SETERRNO(EINVAL, SS_IVCHAN);
14a5cf38 5205 return -1;
c411622e 5206}
5207#endif
760ac839
LW		 5208
5209#ifndef HAS_FGETPOS
5210#undef PerlIO_getpos
5211int
766a733e 5212PerlIO_getpos(PerlIO *f, SV *pos)
760ac839 5213{
14a5cf38
JH		 5214 dTHX;
5215 Off_t posn = PerlIO_tell(f);
5216 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5217 return (posn == (Off_t) - 1) ? -1 : 0;
760ac839 5218}
c411622e 5219#else
c411622e 5220#undef PerlIO_getpos
5221int
766a733e 5222PerlIO_getpos(PerlIO *f, SV *pos)
c411622e 5223{
14a5cf38
JH		 5224 dTHX;
5225 Fpos_t fpos;
5226 int code;
2d4389e4 5227#if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
14a5cf38 5228 code = fgetpos64(f, &fpos);
d9b3e12d 5229#else
14a5cf38 5230 code = fgetpos(f, &fpos);
d9b3e12d 5231#endif
14a5cf38
JH		 5232 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5233 return code;
c411622e 5234}
5235#endif
760ac839 5236
db6e00bd
DD		 5237/* print a failure format string message to stderr and fail exit the process
5238 using only libc without depending on any perl data structures being
5239 initialized.
5240*/
5241
5242void
5243Perl_noperl_die(const char* pat, ...)
5244{
fc917fff 5245 va_list arglist;
db6e00bd
DD		 5246 PERL_ARGS_ASSERT_NOPERL_DIE;
5247 va_start(arglist, pat);
5248 vfprintf(stderr, pat, arglist);
5249 va_end(arglist);
5250 exit(1);
5251}
5252
9cfa90c0 5253/*
14d04a33 5254 * ex: set ts=8 sts=4 sw=4 et:
37442d52 5255 */
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