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[perl5.git] / perlio.c
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14a5cf38 1/*
cbdf9ef8 2 * perlio.c Copyright (c) 1996-2005, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW
5 */
6
14a5cf38 7/*
d31a8517
AT
8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
10 */
11
166f8a29
DM
12/* This file contains the functions needed to implement PerlIO, which
13 * is Perl's private replacement for the C stdio library. This is used
14 * by default unless you compile with -Uuseperlio or run with
15 * PERLIO=:stdio (but don't do this unless you know what you're doing)
16 */
17
d31a8517 18/*
71200d45 19 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 20 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 21 * Invent a dSYS macro to abstract this out
14a5cf38 22 */
7bcba3d4
NIS
23#ifdef PERL_IMPLICIT_SYS
24#define dSYS dTHX
25#else
26#define dSYS dNOOP
27#endif
28
760ac839 29#define VOIDUSED 1
12ae5dfc
JH
30#ifdef PERL_MICRO
31# include "uconfig.h"
32#else
33# include "config.h"
34#endif
760ac839 35
6f9d8c32 36#define PERLIO_NOT_STDIO 0
760ac839 37#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 38/*
71200d45 39 * #define PerlIO FILE
14a5cf38 40 */
760ac839
LW
41#endif
42/*
6f9d8c32 43 * This file provides those parts of PerlIO abstraction
88b61e10 44 * which are not #defined in perlio.h.
6f9d8c32 45 * Which these are depends on various Configure #ifdef's
760ac839
LW
46 */
47
48#include "EXTERN.h"
864dbfa3 49#define PERL_IN_PERLIO_C
760ac839
LW
50#include "perl.h"
51
32af7c23
CL
52#ifdef PERL_IMPLICIT_CONTEXT
53#undef dSYS
54#define dSYS dTHX
55#endif
56
0c4f7ff0
NIS
57#include "XSUB.h"
58
27da23d5
JH
59#define PERLIO_MAX_REFCOUNTABLE_FD 2048
60
9cffb111
OS
61#ifdef __Lynx__
62/* Missing proto on LynxOS */
63int mkstemp(char*);
64#endif
65
1b7a0411 66/* Call the callback or PerlIOBase, and return failure. */
b32dd47e 67#define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
1b7a0411 68 if (PerlIOValid(f)) { \
de009b76 69 const PerlIO_funcs *tab = PerlIOBase(f)->tab; \
1b7a0411
JH
70 if (tab && tab->callback) \
71 return (*tab->callback) args; \
72 else \
73 return PerlIOBase_ ## base args; \
74 } \
75 else \
76 SETERRNO(EBADF, SS_IVCHAN); \
77 return failure
78
79/* Call the callback or fail, and return failure. */
b32dd47e 80#define Perl_PerlIO_or_fail(f, callback, failure, args) \
1b7a0411 81 if (PerlIOValid(f)) { \
de009b76 82 const PerlIO_funcs *tab = PerlIOBase(f)->tab; \
1b7a0411
JH
83 if (tab && tab->callback) \
84 return (*tab->callback) args; \
85 SETERRNO(EINVAL, LIB_INVARG); \
86 } \
87 else \
88 SETERRNO(EBADF, SS_IVCHAN); \
89 return failure
90
91/* Call the callback or PerlIOBase, and be void. */
b32dd47e 92#define Perl_PerlIO_or_Base_void(f, callback, base, args) \
1b7a0411 93 if (PerlIOValid(f)) { \
de009b76 94 const PerlIO_funcs *tab = PerlIOBase(f)->tab; \
1b7a0411
JH
95 if (tab && tab->callback) \
96 (*tab->callback) args; \
97 else \
98 PerlIOBase_ ## base args; \
1b7a0411
JH
99 } \
100 else \
101 SETERRNO(EBADF, SS_IVCHAN)
102
103/* Call the callback or fail, and be void. */
b32dd47e 104#define Perl_PerlIO_or_fail_void(f, callback, args) \
1b7a0411 105 if (PerlIOValid(f)) { \
de009b76 106 const PerlIO_funcs *tab = PerlIOBase(f)->tab; \
1b7a0411
JH
107 if (tab && tab->callback) \
108 (*tab->callback) args; \
37725cdc
NIS
109 else \
110 SETERRNO(EINVAL, LIB_INVARG); \
1b7a0411
JH
111 } \
112 else \
113 SETERRNO(EBADF, SS_IVCHAN)
114
954fb84e
SH
115#ifndef USE_SFIO
116int
f5b9d040 117perlsio_binmode(FILE *fp, int iotype, int mode)
60382766 118{
14a5cf38 119 /*
71200d45 120 * This used to be contents of do_binmode in doio.c
14a5cf38 121 */
60382766
NIS
122#ifdef DOSISH
123# if defined(atarist) || defined(__MINT__)
f5b9d040 124 if (!fflush(fp)) {
60382766 125 if (mode & O_BINARY)
14a5cf38 126 ((FILE *) fp)->_flag |= _IOBIN;
60382766 127 else
14a5cf38 128 ((FILE *) fp)->_flag &= ~_IOBIN;
60382766
NIS
129 return 1;
130 }
131 return 0;
132# else
eb73beca 133 dTHX;
14a5cf38
JH
134#ifdef NETWARE
135 if (PerlLIO_setmode(fp, mode) != -1) {
136#else
f5b9d040 137 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
14a5cf38 138#endif
60382766 139# if defined(WIN32) && defined(__BORLANDC__)
14a5cf38 140 /*
71200d45 141 * The translation mode of the stream is maintained independent of
14a5cf38 142 * the translation mode of the fd in the Borland RTL (heavy
71200d45 143 * digging through their runtime sources reveal). User has to set
14a5cf38 144 * the mode explicitly for the stream (though they don't document
71200d45 145 * this anywhere). GSAR 97-5-24
60382766 146 */
14a5cf38 147 fseek(fp, 0L, 0);
60382766 148 if (mode & O_BINARY)
f5b9d040 149 fp->flags |= _F_BIN;
60382766 150 else
14a5cf38 151 fp->flags &= ~_F_BIN;
60382766
NIS
152# endif
153 return 1;
154 }
155 else
156 return 0;
157# endif
158#else
159# if defined(USEMYBINMODE)
04a0f00b 160 dTHX;
60382766
NIS
161 if (my_binmode(fp, iotype, mode) != FALSE)
162 return 1;
163 else
164 return 0;
165# else
b7787f18
AL
166 (void)fp;
167 (void)iotype;
168 (void)mode;
60382766
NIS
169 return 1;
170# endif
171#endif
172}
de009b76 173#endif /* sfio */
60382766 174
06c7082d 175#ifndef O_ACCMODE
22569500 176#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS
177#endif
178
179int
180PerlIO_intmode2str(int rawmode, char *mode, int *writing)
181{
de009b76 182 const int result = rawmode & O_ACCMODE;
06c7082d
NIS
183 int ix = 0;
184 int ptype;
185 switch (result) {
186 case O_RDONLY:
187 ptype = IoTYPE_RDONLY;
188 break;
189 case O_WRONLY:
190 ptype = IoTYPE_WRONLY;
191 break;
192 case O_RDWR:
193 default:
194 ptype = IoTYPE_RDWR;
195 break;
196 }
197 if (writing)
198 *writing = (result != O_RDONLY);
199
200 if (result == O_RDONLY) {
201 mode[ix++] = 'r';
202 }
203#ifdef O_APPEND
204 else if (rawmode & O_APPEND) {
205 mode[ix++] = 'a';
206 if (result != O_WRONLY)
207 mode[ix++] = '+';
208 }
209#endif
210 else {
211 if (result == O_WRONLY)
212 mode[ix++] = 'w';
213 else {
214 mode[ix++] = 'r';
215 mode[ix++] = '+';
216 }
217 }
218 if (rawmode & O_BINARY)
219 mode[ix++] = 'b';
220 mode[ix] = '\0';
221 return ptype;
222}
223
eb73beca
NIS
224#ifndef PERLIO_LAYERS
225int
226PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
227{
6874a2de
NIS
228 if (!names || !*names
229 || strEQ(names, ":crlf")
230 || strEQ(names, ":raw")
231 || strEQ(names, ":bytes")
232 ) {
14a5cf38
JH
233 return 0;
234 }
235 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
236 /*
71200d45 237 * NOTREACHED
14a5cf38
JH
238 */
239 return -1;
eb73beca
NIS
240}
241
13621cfb
NIS
242void
243PerlIO_destruct(pTHX)
244{
245}
246
f5b9d040
NIS
247int
248PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
249{
92bff44d 250#ifdef USE_SFIO
b7787f18
AL
251 (void)iotype;
252 (void)mode;
253 (void)names;
14a5cf38 254 return 1;
92bff44d 255#else
14a5cf38 256 return perlsio_binmode(fp, iotype, mode);
92bff44d 257#endif
f5b9d040 258}
60382766 259
e0fa5af2 260PerlIO *
ecdeb87c 261PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 262{
27da23d5 263#if defined(PERL_MICRO) || defined(SYMBIAN)
0553478e
NIS
264 return NULL;
265#else
266#ifdef PERL_IMPLICIT_SYS
22569500 267 return PerlSIO_fdupopen(f);
0553478e 268#else
30753f56
NIS
269#ifdef WIN32
270 return win32_fdupopen(f);
271#else
e0fa5af2 272 if (f) {
504618e9 273 const int fd = PerlLIO_dup(PerlIO_fileno(f));
e0fa5af2 274 if (fd >= 0) {
06c7082d
NIS
275 char mode[8];
276 int omode = fcntl(fd, F_GETFL);
a5936e02
JH
277#ifdef DJGPP
278 omode = djgpp_get_stream_mode(f);
279#endif
06c7082d 280 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 281 /* the r+ is a hack */
06c7082d 282 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS
283 }
284 return NULL;
285 }
286 else {
93189314 287 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 288 }
7114a2d2 289#endif
e0fa5af2 290 return NULL;
0553478e 291#endif
30753f56 292#endif
e0fa5af2
NIS
293}
294
295
14a5cf38 296/*
71200d45 297 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 298 */
ee518936
NIS
299
300PerlIO *
14a5cf38
JH
301PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
302 int imode, int perm, PerlIO *old, int narg, SV **args)
303{
7cf31beb
NIS
304 if (narg) {
305 if (narg > 1) {
3b8752bb 306 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 307 }
14a5cf38
JH
308 if (*args == &PL_sv_undef)
309 return PerlIO_tmpfile();
310 else {
e62f0680 311 const char *name = SvPV_nolen_const(*args);
3b6c1aba 312 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
313 fd = PerlLIO_open3(name, imode, perm);
314 if (fd >= 0)
de009b76 315 return PerlIO_fdopen(fd, mode + 1);
14a5cf38
JH
316 }
317 else if (old) {
318 return PerlIO_reopen(name, mode, old);
319 }
320 else {
321 return PerlIO_open(name, mode);
322 }
323 }
324 }
325 else {
326 return PerlIO_fdopen(fd, (char *) mode);
327 }
328 return NULL;
ee518936
NIS
329}
330
0c4f7ff0
NIS
331XS(XS_PerlIO__Layer__find)
332{
14a5cf38
JH
333 dXSARGS;
334 if (items < 2)
335 Perl_croak(aTHX_ "Usage class->find(name[,load])");
336 else {
e62f0680 337 const char *name = SvPV_nolen_const(ST(1));
14a5cf38
JH
338 ST(0) = (strEQ(name, "crlf")
339 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
340 XSRETURN(1);
341 }
0c4f7ff0
NIS
342}
343
344
345void
346Perl_boot_core_PerlIO(pTHX)
347{
14a5cf38 348 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS
349}
350
ac27b0f5
NIS
351#endif
352
32e30700 353
6f9d8c32 354#ifdef PERLIO_IS_STDIO
760ac839
LW
355
356void
e8632036 357PerlIO_init(pTHX)
760ac839 358{
14a5cf38
JH
359 /*
360 * Does nothing (yet) except force this file to be included in perl
71200d45 361 * binary. That allows this file to force inclusion of other functions
14a5cf38 362 * that may be required by loadable extensions e.g. for
71200d45 363 * FileHandle::tmpfile
14a5cf38 364 */
760ac839
LW
365}
366
33dcbb9a
PP
367#undef PerlIO_tmpfile
368PerlIO *
8ac85365 369PerlIO_tmpfile(void)
33dcbb9a 370{
14a5cf38 371 return tmpfile();
33dcbb9a
PP
372}
373
22569500 374#else /* PERLIO_IS_STDIO */
760ac839
LW
375
376#ifdef USE_SFIO
377
378#undef HAS_FSETPOS
379#undef HAS_FGETPOS
380
14a5cf38
JH
381/*
382 * This section is just to make sure these functions get pulled in from
71200d45 383 * libsfio.a
14a5cf38 384 */
760ac839
LW
385
386#undef PerlIO_tmpfile
387PerlIO *
c78749f2 388PerlIO_tmpfile(void)
760ac839 389{
14a5cf38 390 return sftmp(0);
760ac839
LW
391}
392
393void
e8632036 394PerlIO_init(pTHX)
760ac839 395{
14a5cf38
JH
396 /*
397 * Force this file to be included in perl binary. Which allows this
398 * file to force inclusion of other functions that may be required by
71200d45 399 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 400 */
760ac839 401
14a5cf38 402 /*
71200d45 403 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 404 * results in a lot of lseek()s to regular files and lot of small
71200d45 405 * writes to pipes.
14a5cf38
JH
406 */
407 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW
408}
409
b9d6bf13 410/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 411PerlIO *
4b069b44 412PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 413{
de009b76 414 const int fd = fileno(stdio);
4b069b44 415 if (!mode || !*mode) {
81428673 416 mode = "r+";
4b069b44
NIS
417 }
418 return PerlIO_fdopen(fd, mode);
92bff44d
NIS
419}
420
421FILE *
422PerlIO_findFILE(PerlIO *pio)
423{
de009b76
AL
424 const int fd = PerlIO_fileno(pio);
425 FILE * const f = fdopen(fd, "r+");
14a5cf38
JH
426 PerlIO_flush(pio);
427 if (!f && errno == EINVAL)
428 f = fdopen(fd, "w");
429 if (!f && errno == EINVAL)
430 f = fdopen(fd, "r");
431 return f;
92bff44d
NIS
432}
433
434
22569500 435#else /* USE_SFIO */
6f9d8c32 436/*======================================================================================*/
14a5cf38 437/*
71200d45 438 * Implement all the PerlIO interface ourselves.
9e353e3b 439 */
760ac839 440
76ced9ad
NIS
441#include "perliol.h"
442
14a5cf38
JH
443/*
444 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 445 * files
14a5cf38 446 */
02f66e2f
NIS
447#ifdef I_UNISTD
448#include <unistd.h>
449#endif
06da4f11
NIS
450#ifdef HAS_MMAP
451#include <sys/mman.h>
452#endif
453
6f9d8c32 454void
14a5cf38
JH
455PerlIO_debug(const char *fmt, ...)
456{
14a5cf38
JH
457 va_list ap;
458 dSYS;
459 va_start(ap, fmt);
27da23d5 460 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
de009b76 461 const char *s = PerlEnv_getenv("PERLIO_DEBUG");
14a5cf38 462 if (s && *s)
27da23d5 463 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
14a5cf38 464 else
27da23d5 465 PL_perlio_debug_fd = -1;
14a5cf38 466 }
27da23d5 467 if (PL_perlio_debug_fd > 0) {
14a5cf38 468 dTHX;
de009b76
AL
469 const char *s = CopFILE(PL_curcop);
470 STRLEN len;
70ace5da
NIS
471#ifdef USE_ITHREADS
472 /* Use fixed buffer as sv_catpvf etc. needs SVs */
473 char buffer[1024];
70ace5da
NIS
474 if (!s)
475 s = "(none)";
de009b76 476 len = sprintf(buffer, "%.40s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
70ace5da 477 vsprintf(buffer+len, fmt, ap);
27da23d5 478 PerlLIO_write(PL_perlio_debug_fd, buffer, strlen(buffer));
70ace5da 479#else
14a5cf38 480 SV *sv = newSVpvn("", 0);
14a5cf38
JH
481 if (!s)
482 s = "(none)";
483 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
484 (IV) CopLINE(PL_curcop));
485 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
486
b83604b4 487 s = SvPV_const(sv, len);
27da23d5 488 PerlLIO_write(PL_perlio_debug_fd, s, len);
14a5cf38 489 SvREFCNT_dec(sv);
70ace5da 490#endif
14a5cf38
JH
491 }
492 va_end(ap);
6f9d8c32
NIS
493}
494
9e353e3b
NIS
495/*--------------------------------------------------------------------------------------*/
496
14a5cf38 497/*
71200d45 498 * Inner level routines
14a5cf38 499 */
9e353e3b 500
14a5cf38 501/*
71200d45 502 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 503 */
05d1247b 504#define PERLIO_TABLE_SIZE 64
6f9d8c32 505
760ac839 506PerlIO *
5f1a76d0 507PerlIO_allocate(pTHX)
6f9d8c32 508{
14a5cf38 509 /*
71200d45 510 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH
511 */
512 PerlIO **last;
513 PerlIO *f;
a1ea730d 514 last = &PL_perlio;
14a5cf38
JH
515 while ((f = *last)) {
516 int i;
517 last = (PerlIO **) (f);
518 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
519 if (!*++f) {
520 return f;
521 }
522 }
523 }
3a1ee7e8 524 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH
525 if (!f) {
526 return NULL;
527 }
528 *last = f;
529 return f + 1;
05d1247b
NIS
530}
531
a1ea730d
NIS
532#undef PerlIO_fdupopen
533PerlIO *
ecdeb87c 534PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 535{
04892f78 536 if (PerlIOValid(f)) {
de009b76 537 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
fe5a182c 538 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
210e727c
JH
539 if (tab && tab->Dup)
540 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
37725cdc
NIS
541 else {
542 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
543 }
a1ea730d 544 }
210e727c
JH
545 else
546 SETERRNO(EBADF, SS_IVCHAN);
547
548 return NULL;
a1ea730d
NIS
549}
550
551void
5f1a76d0 552PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 553{
14a5cf38
JH
554 PerlIO *table = *tablep;
555 if (table) {
556 int i;
557 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
558 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
559 PerlIO *f = table + i;
560 if (*f) {
561 PerlIO_close(f);
562 }
563 }
3a1ee7e8 564 Safefree(table);
14a5cf38 565 *tablep = NULL;
05d1247b 566 }
05d1247b
NIS
567}
568
fcf2db38
NIS
569
570PerlIO_list_t *
3a1ee7e8 571PerlIO_list_alloc(pTHX)
fcf2db38 572{
14a5cf38
JH
573 PerlIO_list_t *list;
574 Newz('L', list, 1, PerlIO_list_t);
575 list->refcnt = 1;
576 return list;
fcf2db38
NIS
577}
578
579void
3a1ee7e8 580PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 581{
14a5cf38
JH
582 if (list) {
583 if (--list->refcnt == 0) {
584 if (list->array) {
14a5cf38
JH
585 IV i;
586 for (i = 0; i < list->cur; i++) {
587 if (list->array[i].arg)
588 SvREFCNT_dec(list->array[i].arg);
589 }
590 Safefree(list->array);
591 }
592 Safefree(list);
593 }
594 }
fcf2db38
NIS
595}
596
597void
3a1ee7e8 598PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 599{
14a5cf38
JH
600 PerlIO_pair_t *p;
601 if (list->cur >= list->len) {
602 list->len += 8;
603 if (list->array)
604 Renew(list->array, list->len, PerlIO_pair_t);
605 else
606 New('l', list->array, list->len, PerlIO_pair_t);
607 }
608 p = &(list->array[list->cur++]);
609 p->funcs = funcs;
610 if ((p->arg = arg)) {
7fc63493 611 (void)SvREFCNT_inc(arg);
14a5cf38 612 }
fcf2db38
NIS
613}
614
3a1ee7e8
NIS
615PerlIO_list_t *
616PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
617{
694c95cf
JH
618 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
619 if (proto) {
620 int i;
621 list = PerlIO_list_alloc(aTHX);
622 for (i=0; i < proto->cur; i++) {
623 SV *arg = Nullsv;
624 if (proto->array[i].arg)
625 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
626 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
627 }
3a1ee7e8
NIS
628 }
629 return list;
630}
4a4a6116 631
05d1247b 632void
3a1ee7e8 633PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 634{
3aaf42a7 635#ifdef USE_ITHREADS
3a1ee7e8
NIS
636 PerlIO **table = &proto->Iperlio;
637 PerlIO *f;
638 PL_perlio = NULL;
639 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
640 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
641 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 642 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS
643 while ((f = *table)) {
644 int i;
645 table = (PerlIO **) (f++);
646 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
647 if (*f) {
93a8090d 648 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
649 }
650 f++;
651 }
652 }
1b6737cc
AL
653#else
654 PERL_UNUSED_ARG(proto);
655 PERL_UNUSED_ARG(param);
3aaf42a7 656#endif
9a6404c5
DM
657}
658
659void
13621cfb
NIS
660PerlIO_destruct(pTHX)
661{
a1ea730d 662 PerlIO **table = &PL_perlio;
14a5cf38 663 PerlIO *f;
694c95cf
JH
664#ifdef USE_ITHREADS
665 PerlIO_debug("Destruct %p\n",aTHX);
666#endif
14a5cf38
JH
667 while ((f = *table)) {
668 int i;
669 table = (PerlIO **) (f++);
670 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
671 PerlIO *x = f;
672 PerlIOl *l;
673 while ((l = *x)) {
674 if (l->tab->kind & PERLIO_K_DESTRUCT) {
675 PerlIO_debug("Destruct popping %s\n", l->tab->name);
676 PerlIO_flush(x);
677 PerlIO_pop(aTHX_ x);
678 }
679 else {
680 x = PerlIONext(x);
681 }
682 }
683 f++;
684 }
685 }
13621cfb
NIS
686}
687
688void
a999f61b 689PerlIO_pop(pTHX_ PerlIO *f)
760ac839 690{
14a5cf38
JH
691 PerlIOl *l = *f;
692 if (l) {
fe5a182c 693 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
694 if (l->tab->Popped) {
695 /*
696 * If popped returns non-zero do not free its layer structure
697 * it has either done so itself, or it is shared and still in
71200d45 698 * use
14a5cf38 699 */
f62ce20a 700 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
701 return;
702 }
b47cad08 703 *f = l->next;
3a1ee7e8 704 Safefree(l);
a8c08ecd 705 }
6f9d8c32
NIS
706}
707
39f7a870
JH
708/* Return as an array the stack of layers on a filehandle. Note that
709 * the stack is returned top-first in the array, and there are three
710 * times as many array elements as there are layers in the stack: the
711 * first element of a layer triplet is the name, the second one is the
712 * arguments, and the third one is the flags. */
713
714AV *
715PerlIO_get_layers(pTHX_ PerlIO *f)
716{
717 AV *av = newAV();
718
719 if (PerlIOValid(f)) {
39f7a870
JH
720 PerlIOl *l = PerlIOBase(f);
721
722 while (l) {
723 SV *name = l->tab && l->tab->name ?
724 newSVpv(l->tab->name, 0) : &PL_sv_undef;
725 SV *arg = l->tab && l->tab->Getarg ?
726 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
727 av_push(av, name);
728 av_push(av, arg);
729 av_push(av, newSViv((IV)l->flags));
730 l = l->next;
731 }
732 }
733
734 return av;
735}
736
9e353e3b 737/*--------------------------------------------------------------------------------------*/
14a5cf38 738/*
71200d45 739 * XS Interface for perl code
14a5cf38 740 */
9e353e3b 741
fcf2db38 742PerlIO_funcs *
2edd7e44 743PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 744{
27da23d5 745 dVAR;
14a5cf38
JH
746 IV i;
747 if ((SSize_t) len <= 0)
748 len = strlen(name);
3a1ee7e8
NIS
749 for (i = 0; i < PL_known_layers->cur; i++) {
750 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
a9f76400 751 if (memEQ(f->name, name, len) && f->name[len] == 0) {
fe5a182c 752 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
753 return f;
754 }
755 }
3a1ee7e8
NIS
756 if (load && PL_subname && PL_def_layerlist
757 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
758 if (PL_in_load_module) {
759 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
760 return NULL;
761 } else {
762 SV *pkgsv = newSVpvn("PerlIO", 6);
763 SV *layer = newSVpvn(name, len);
c9bca74a
NIS
764 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
765 ENTER;
d7a09b41 766 SAVEINT(PL_in_load_module);
c9bca74a 767 if (cv) {
9cfa90c0 768 SAVEGENERICSV(PL_warnhook);
504618e9 769 (void)SvREFCNT_inc(cv);
c9bca74a
NIS
770 PL_warnhook = (SV *) cv;
771 }
d7a09b41
SR
772 PL_in_load_module++;
773 /*
774 * The two SVs are magically freed by load_module
775 */
776 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
777 PL_in_load_module--;
778 LEAVE;
779 return PerlIO_find_layer(aTHX_ name, len, 0);
780 }
14a5cf38
JH
781 }
782 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
783 return NULL;
f3862f8b
NIS
784}
785
2a1bc955 786#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
787
788static int
789perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
790{
14a5cf38
JH
791 if (SvROK(sv)) {
792 IO *io = GvIOn((GV *) SvRV(sv));
793 PerlIO *ifp = IoIFP(io);
794 PerlIO *ofp = IoOFP(io);
795 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
796 }
797 return 0;
b13b2135
NIS
798}
799
800static int
801perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
802{
14a5cf38
JH
803 if (SvROK(sv)) {
804 IO *io = GvIOn((GV *) SvRV(sv));
805 PerlIO *ifp = IoIFP(io);
806 PerlIO *ofp = IoOFP(io);
807 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
808 }
809 return 0;
b13b2135
NIS
810}
811
812static int
813perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
814{
14a5cf38
JH
815 Perl_warn(aTHX_ "clear %" SVf, sv);
816 return 0;
b13b2135
NIS
817}
818
819static int
820perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
821{
14a5cf38
JH
822 Perl_warn(aTHX_ "free %" SVf, sv);
823 return 0;
b13b2135
NIS
824}
825
826MGVTBL perlio_vtab = {
14a5cf38
JH
827 perlio_mg_get,
828 perlio_mg_set,
22569500 829 NULL, /* len */
14a5cf38
JH
830 perlio_mg_clear,
831 perlio_mg_free
b13b2135
NIS
832};
833
834XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
835{
14a5cf38
JH
836 dXSARGS;
837 SV *sv = SvRV(ST(1));
838 AV *av = newAV();
839 MAGIC *mg;
840 int count = 0;
841 int i;
842 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
843 SvRMAGICAL_off(sv);
844 mg = mg_find(sv, PERL_MAGIC_ext);
845 mg->mg_virtual = &perlio_vtab;
846 mg_magical(sv);
847 Perl_warn(aTHX_ "attrib %" SVf, sv);
848 for (i = 2; i < items; i++) {
849 STRLEN len;
e62f0680 850 const char *name = SvPV_const(ST(i), len);
14a5cf38
JH
851 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
852 if (layer) {
853 av_push(av, SvREFCNT_inc(layer));
854 }
855 else {
856 ST(count) = ST(i);
857 count++;
858 }
859 }
860 SvREFCNT_dec(av);
861 XSRETURN(count);
862}
863
22569500 864#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 865
e3f3bf95
NIS
866SV *
867PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 868{
14a5cf38
JH
869 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
870 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
871 return sv;
e3f3bf95
NIS
872}
873
5ca1d77f 874XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 875{
37725cdc 876 /* This is used as a %SIG{__WARN__} handler to supress warnings
c9bca74a
NIS
877 during loading of layers.
878 */
879 dXSARGS;
880 if (items)
e62f0680 881 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
c9bca74a
NIS
882 XSRETURN(0);
883}
884
5ca1d77f 885XS(XS_PerlIO__Layer__find)
0c4f7ff0 886{
14a5cf38
JH
887 dXSARGS;
888 if (items < 2)
889 Perl_croak(aTHX_ "Usage class->find(name[,load])");
890 else {
de009b76 891 STRLEN len;
e62f0680 892 const char *name = SvPV_const(ST(1), len);
de009b76 893 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
14a5cf38
JH
894 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
895 ST(0) =
896 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
897 &PL_sv_undef;
898 XSRETURN(1);
899 }
0c4f7ff0
NIS
900}
901
e3f3bf95
NIS
902void
903PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
904{
3a1ee7e8
NIS
905 if (!PL_known_layers)
906 PL_known_layers = PerlIO_list_alloc(aTHX);
907 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
fe5a182c 908 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
909}
910
1141d9f8 911int
fcf2db38 912PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 913{
14a5cf38
JH
914 if (names) {
915 const char *s = names;
916 while (*s) {
917 while (isSPACE(*s) || *s == ':')
918 s++;
919 if (*s) {
920 STRLEN llen = 0;
921 const char *e = s;
922 const char *as = Nullch;
923 STRLEN alen = 0;
924 if (!isIDFIRST(*s)) {
925 /*
926 * Message is consistent with how attribute lists are
927 * passed. Even though this means "foo : : bar" is
71200d45 928 * seen as an invalid separator character.
14a5cf38 929 */
de009b76 930 const char q = ((*s == '\'') ? '"' : '\'');
99ef548b 931 if (ckWARN(WARN_LAYER))
22569500 932 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 933 "Invalid separator character %c%c%c in PerlIO layer specification %s",
1e616cf5 934 q, *s, q, s);
93189314 935 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
936 return -1;
937 }
938 do {
939 e++;
940 } while (isALNUM(*e));
941 llen = e - s;
942 if (*e == '(') {
943 int nesting = 1;
944 as = ++e;
945 while (nesting) {
946 switch (*e++) {
947 case ')':
948 if (--nesting == 0)
949 alen = (e - 1) - as;
950 break;
951 case '(':
952 ++nesting;
953 break;
954 case '\\':
955 /*
956 * It's a nul terminated string, not allowed
957 * to \ the terminating null. Anything other
71200d45 958 * character is passed over.
14a5cf38
JH
959 */
960 if (*e++) {
961 break;
962 }
963 /*
71200d45 964 * Drop through
14a5cf38
JH
965 */
966 case '\0':
967 e--;
22569500
NIS
968 if (ckWARN(WARN_LAYER))
969 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 970 "Argument list not closed for PerlIO layer \"%.*s\"",
14a5cf38
JH
971 (int) (e - s), s);
972 return -1;
973 default:
974 /*
71200d45 975 * boring.
14a5cf38
JH
976 */
977 break;
978 }
979 }
980 }
981 if (e > s) {
de009b76 982 const bool warn_layer = ckWARN(WARN_LAYER);
14a5cf38
JH
983 PerlIO_funcs *layer =
984 PerlIO_find_layer(aTHX_ s, llen, 1);
985 if (layer) {
3a1ee7e8 986 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH
987 (as) ? newSVpvn(as,
988 alen) :
989 &PL_sv_undef);
990 }
991 else {
22569500 992 if (warn_layer)
b4581f09 993 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
14a5cf38
JH
994 (int) llen, s);
995 return -1;
996 }
997 }
998 s = e;
999 }
1000 }
1001 }
1002 return 0;
1141d9f8
NIS
1003}
1004
dfebf958 1005void
fcf2db38 1006PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 1007{
27da23d5 1008 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 1009#ifdef PERLIO_USING_CRLF
6ce75a77 1010 tab = &PerlIO_crlf;
846be114 1011#else
6ce75a77 1012 if (PerlIO_stdio.Set_ptrcnt)
22569500 1013 tab = &PerlIO_stdio;
846be114 1014#endif
14a5cf38 1015 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 1016 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 1017 &PL_sv_undef);
dfebf958
NIS
1018}
1019
e3f3bf95 1020SV *
14a5cf38 1021PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 1022{
14a5cf38 1023 return av->array[n].arg;
e3f3bf95
NIS
1024}
1025
f3862f8b 1026PerlIO_funcs *
14a5cf38 1027PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1028{
14a5cf38
JH
1029 if (n >= 0 && n < av->cur) {
1030 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1031 av->array[n].funcs->name);
1032 return av->array[n].funcs;
1033 }
1034 if (!def)
1035 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1036 return def;
e3f3bf95
NIS
1037}
1038
4ec2216f
NIS
1039IV
1040PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1041{
de009b76
AL
1042 (void)mode;
1043 (void)arg;
1044 (void)tab;
4ec2216f
NIS
1045 if (PerlIOValid(f)) {
1046 PerlIO_flush(f);
1047 PerlIO_pop(aTHX_ f);
1048 return 0;
1049 }
1050 return -1;
1051}
1052
27da23d5 1053PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS
1054 sizeof(PerlIO_funcs),
1055 "pop",
1056 0,
1057 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1058 PerlIOPop_pushed,
1059 NULL,
1060 NULL,
1061 NULL,
1062 NULL,
1063 NULL,
1064 NULL,
1065 NULL,
1066 NULL,
1067 NULL,
1068 NULL,
de009b76
AL
1069 NULL,
1070 NULL,
4ec2216f
NIS
1071 NULL, /* flush */
1072 NULL, /* fill */
1073 NULL,
1074 NULL,
1075 NULL,
1076 NULL,
1077 NULL, /* get_base */
1078 NULL, /* get_bufsiz */
1079 NULL, /* get_ptr */
1080 NULL, /* get_cnt */
1081 NULL, /* set_ptrcnt */
1082};
1083
fcf2db38 1084PerlIO_list_t *
e3f3bf95
NIS
1085PerlIO_default_layers(pTHX)
1086{
3a1ee7e8 1087 if (!PL_def_layerlist) {
14a5cf38 1088 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
27da23d5 1089 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1090 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1091 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1092#if defined(WIN32)
27da23d5 1093 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1094#if 0
14a5cf38 1095 osLayer = &PerlIO_win32;
0c4128ad 1096#endif
2f8118af 1097#endif
27da23d5
JH
1098 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1099 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1100 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1101 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
06da4f11 1102#ifdef HAS_MMAP
27da23d5 1103 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
06da4f11 1104#endif
27da23d5
JH
1105 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1106 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1107 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
3a1ee7e8 1108 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1109 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1110 &PL_sv_undef);
1111 if (s) {
3a1ee7e8 1112 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1113 }
1114 else {
3a1ee7e8 1115 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1116 }
1141d9f8 1117 }
3a1ee7e8
NIS
1118 if (PL_def_layerlist->cur < 2) {
1119 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1120 }
3a1ee7e8 1121 return PL_def_layerlist;
e3f3bf95
NIS
1122}
1123
0c4f7ff0
NIS
1124void
1125Perl_boot_core_PerlIO(pTHX)
1126{
1127#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1128 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1129 __FILE__);
0c4f7ff0 1130#endif
14a5cf38 1131 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1132 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1133}
e3f3bf95
NIS
1134
1135PerlIO_funcs *
1136PerlIO_default_layer(pTHX_ I32 n)
1137{
14a5cf38
JH
1138 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1139 if (n < 0)
1140 n += av->cur;
27da23d5 1141 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS
1142}
1143
a999f61b
NIS
1144#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1145#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1146
1147void
1141d9f8 1148PerlIO_stdstreams(pTHX)
60382766 1149{
a1ea730d 1150 if (!PL_perlio) {
14a5cf38
JH
1151 PerlIO_allocate(aTHX);
1152 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1153 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1154 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1155 }
60382766
NIS
1156}
1157
1158PerlIO *
27da23d5 1159PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1160{
2dc2558e
NIS
1161 if (tab->fsize != sizeof(PerlIO_funcs)) {
1162 mismatch:
1163 Perl_croak(aTHX_ "Layer does not match this perl");
1164 }
1165 if (tab->size) {
b464bac0 1166 PerlIOl *l;
2dc2558e
NIS
1167 if (tab->size < sizeof(PerlIOl)) {
1168 goto mismatch;
1169 }
1170 /* Real layer with a data area */
1171 Newc('L',l,tab->size,char,PerlIOl);
1172 if (l && f) {
1173 Zero(l, tab->size, char);
1174 l->next = *f;
27da23d5 1175 l->tab = (PerlIO_funcs*) tab;
2dc2558e
NIS
1176 *f = l;
1177 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1178 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1179 if (*l->tab->Pushed &&
27da23d5 1180 (*l->tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
2dc2558e
NIS
1181 PerlIO_pop(aTHX_ f);
1182 return NULL;
1183 }
1184 }
1185 }
1186 else if (f) {
1187 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1188 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1189 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1190 if (tab->Pushed &&
27da23d5 1191 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1192 return NULL;
14a5cf38
JH
1193 }
1194 }
1195 return f;
60382766
NIS
1196}
1197
dfebf958 1198IV
86e05cf2
NIS
1199PerlIOBase_binmode(pTHX_ PerlIO *f)
1200{
1201 if (PerlIOValid(f)) {
1202 /* Is layer suitable for raw stream ? */
1203 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1204 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1205 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1206 }
1207 else {
1208 /* Not suitable - pop it */
1209 PerlIO_pop(aTHX_ f);
1210 }
1211 return 0;
1212 }
1213 return -1;
1214}
1215
1216IV
2dc2558e 1217PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1218{
de009b76
AL
1219 (void)mode;
1220 (void)arg;
1221 (void)tab;
86e05cf2 1222
04892f78 1223 if (PerlIOValid(f)) {
86e05cf2 1224 PerlIO *t;
de009b76 1225 const PerlIOl *l;
14a5cf38 1226 PerlIO_flush(f);
86e05cf2
NIS
1227 /*
1228 * Strip all layers that are not suitable for a raw stream
1229 */
1230 t = f;
1231 while (t && (l = *t)) {
1232 if (l->tab->Binmode) {
1233 /* Has a handler - normal case */
1234 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1235 if (*t == l) {
1236 /* Layer still there - move down a layer */
1237 t = PerlIONext(t);
1238 }
1239 }
1240 else {
1241 return -1;
1242 }
14a5cf38
JH
1243 }
1244 else {
86e05cf2
NIS
1245 /* No handler - pop it */
1246 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1247 }
1248 }
86e05cf2
NIS
1249 if (PerlIOValid(f)) {
1250 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1251 return 0;
1252 }
14a5cf38
JH
1253 }
1254 return -1;
dfebf958
NIS
1255}
1256
ac27b0f5 1257int
14a5cf38 1258PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1259 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1260{
14a5cf38
JH
1261 int code = 0;
1262 while (n < max) {
1263 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1264 if (tab) {
1265 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1266 code = -1;
1267 break;
1268 }
1269 }
1270 n++;
1271 }
1272 return code;
e3f3bf95
NIS
1273}
1274
1275int
ac27b0f5
NIS
1276PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1277{
14a5cf38 1278 int code = 0;
53f1b6d2 1279 if (f && names) {
3a1ee7e8 1280 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1281 code = PerlIO_parse_layers(aTHX_ layers, names);
1282 if (code == 0) {
d9dac8cd 1283 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1284 }
3a1ee7e8 1285 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1286 }
14a5cf38 1287 return code;
ac27b0f5
NIS
1288}
1289
f3862f8b 1290
60382766 1291/*--------------------------------------------------------------------------------------*/
14a5cf38 1292/*
71200d45 1293 * Given the abstraction above the public API functions
14a5cf38 1294 */
60382766
NIS
1295
1296int
f5b9d040 1297PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1298{
14a5cf38 1299 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
fe5a182c 1300 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
14a5cf38 1301 (names) ? names : "(Null)");
03c0554d
NIS
1302 if (names) {
1303 /* Do not flush etc. if (e.g.) switching encodings.
1304 if a pushed layer knows it needs to flush lower layers
1305 (for example :unix which is never going to call them)
1306 it can do the flush when it is pushed.
1307 */
1308 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1309 }
1310 else {
86e05cf2 1311 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1312#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1313 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1314 O_BINARY so we can look for it in mode.
1315 */
1316 if (!(mode & O_BINARY)) {
1317 /* Text mode */
86e05cf2
NIS
1318 /* FIXME?: Looking down the layer stack seems wrong,
1319 but is a way of reaching past (say) an encoding layer
1320 to flip CRLF-ness of the layer(s) below
1321 */
03c0554d
NIS
1322 while (*f) {
1323 /* Perhaps we should turn on bottom-most aware layer
1324 e.g. Ilya's idea that UNIX TTY could serve
1325 */
1326 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1327 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1328 /* Not in text mode - flush any pending stuff and flip it */
1329 PerlIO_flush(f);
1330 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1331 }
1332 /* Only need to turn it on in one layer so we are done */
1333 return TRUE;
ed53a2bb 1334 }
03c0554d 1335 f = PerlIONext(f);
14a5cf38 1336 }
03c0554d
NIS
1337 /* Not finding a CRLF aware layer presumably means we are binary
1338 which is not what was requested - so we failed
1339 We _could_ push :crlf layer but so could caller
1340 */
1341 return FALSE;
14a5cf38 1342 }
6ce75a77 1343#endif
86e05cf2
NIS
1344 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1345 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1346 */
27da23d5 1347 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), Nullch, Nullsv) ? TRUE : FALSE;
14a5cf38 1348 }
f5b9d040
NIS
1349}
1350
f5b9d040 1351int
e87a358a 1352PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1353{
37725cdc
NIS
1354 if (PerlIOValid(f)) {
1355 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1356 if (tab && tab->Close)
1357 return (*tab->Close)(aTHX_ f);
1358 else
1359 return PerlIOBase_close(aTHX_ f);
1360 }
14a5cf38 1361 else {
93189314 1362 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1363 return -1;
1364 }
76ced9ad
NIS
1365}
1366
b931b1d9 1367int
e87a358a 1368Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1369{
de009b76 1370 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS
1371 while (PerlIOValid(f)) {
1372 PerlIO_pop(aTHX_ f);
f6c77cf1 1373 }
14a5cf38 1374 return code;
b931b1d9
NIS
1375}
1376
b931b1d9 1377int
e87a358a 1378Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1379{
b32dd47e 1380 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS
1381}
1382
1141d9f8
NIS
1383static const char *
1384PerlIO_context_layers(pTHX_ const char *mode)
1385{
14a5cf38
JH
1386 const char *type = NULL;
1387 /*
71200d45 1388 * Need to supply default layer info from open.pm
14a5cf38
JH
1389 */
1390 if (PL_curcop) {
1391 SV *layers = PL_curcop->cop_io;
1392 if (layers) {
1393 STRLEN len;
b83604b4 1394 type = SvPV_const(layers, len);
14a5cf38
JH
1395 if (type && mode[0] != 'r') {
1396 /*
71200d45 1397 * Skip to write part
14a5cf38
JH
1398 */
1399 const char *s = strchr(type, 0);
eb160463 1400 if (s && (STRLEN)(s - type) < len) {
14a5cf38
JH
1401 type = s + 1;
1402 }
1403 }
1404 }
1405 }
1406 return type;
1141d9f8
NIS
1407}
1408
fcf2db38 1409static PerlIO_funcs *
2edd7e44
NIS
1410PerlIO_layer_from_ref(pTHX_ SV *sv)
1411{
14a5cf38 1412 /*
71200d45 1413 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH
1414 */
1415 if (SvTYPE(sv) < SVt_PVAV)
e934609f 1416 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
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:
1423 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1424 case SVt_PVHV:
1425 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1426 case SVt_PVCV:
1427 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1428 case SVt_PVGV:
1429 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1430 }
1431 return NULL;
2edd7e44
NIS
1432}
1433
fcf2db38 1434PerlIO_list_t *
14a5cf38
JH
1435PerlIO_resolve_layers(pTHX_ const char *layers,
1436 const char *mode, int narg, SV **args)
1437{
1438 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1439 int incdef = 1;
a1ea730d 1440 if (!PL_perlio)
14a5cf38
JH
1441 PerlIO_stdstreams(aTHX);
1442 if (narg) {
1443 SV *arg = *args;
1444 /*
71200d45
NIS
1445 * If it is a reference but not an object see if we have a handler
1446 * for it
14a5cf38
JH
1447 */
1448 if (SvROK(arg) && !sv_isobject(arg)) {
1449 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1450 if (handler) {
3a1ee7e8
NIS
1451 def = PerlIO_list_alloc(aTHX);
1452 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1453 incdef = 0;
1454 }
1455 /*
e934609f 1456 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1457 * something sensible else we will just stringfy and open
71200d45 1458 * resulting string.
14a5cf38
JH
1459 */
1460 }
1461 }
1462 if (!layers)
1463 layers = PerlIO_context_layers(aTHX_ mode);
1464 if (layers && *layers) {
1465 PerlIO_list_t *av;
1466 if (incdef) {
de009b76 1467 IV i;
3a1ee7e8 1468 av = PerlIO_list_alloc(aTHX);
14a5cf38 1469 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1470 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH
1471 def->array[i].arg);
1472 }
1473 }
1474 else {
1475 av = def;
1476 }
0cff2cf3
NIS
1477 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1478 return av;
1479 }
1480 else {
1481 PerlIO_list_free(aTHX_ av);
1482 return (PerlIO_list_t *) NULL;
1483 }
14a5cf38
JH
1484 }
1485 else {
1486 if (incdef)
1487 def->refcnt++;
1488 return def;
1489 }
ee518936
NIS
1490}
1491
1492PerlIO *
14a5cf38
JH
1493PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1494 int imode, int perm, PerlIO *f, int narg, SV **args)
1495{
1496 if (!f && narg == 1 && *args == &PL_sv_undef) {
1497 if ((f = PerlIO_tmpfile())) {
1498 if (!layers)
1499 layers = PerlIO_context_layers(aTHX_ mode);
1500 if (layers && *layers)
1501 PerlIO_apply_layers(aTHX_ f, mode, layers);
1502 }
1503 }
1504 else {
de009b76 1505 PerlIO_list_t *layera;
14a5cf38
JH
1506 IV n;
1507 PerlIO_funcs *tab = NULL;
04892f78 1508 if (PerlIOValid(f)) {
14a5cf38 1509 /*
71200d45
NIS
1510 * This is "reopen" - it is not tested as perl does not use it
1511 * yet
14a5cf38
JH
1512 */
1513 PerlIOl *l = *f;
3a1ee7e8 1514 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1515 while (l) {
04892f78
NIS
1516 SV *arg = (l->tab->Getarg)
1517 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1518 : &PL_sv_undef;
3a1ee7e8 1519 PerlIO_list_push(aTHX_ layera, l->tab, 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) {
1534 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
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 }
14a5cf38 1548 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
fe5a182c
JH
1549 tab->name, layers, mode, fd, imode, perm,
1550 (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{
b32dd47e 1581 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1582}
1583
313ca112 1584SSize_t
e87a358a 1585Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1586{
b32dd47e 1587 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1588}
1589
9e353e3b 1590SSize_t
e87a358a 1591Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1592{
b32dd47e 1593 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1594}
1595
6f9d8c32 1596int
e87a358a 1597Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1598{
b32dd47e 1599 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW
1600}
1601
9e353e3b 1602Off_t
e87a358a 1603Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1604{
b32dd47e 1605 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW
1606}
1607
6f9d8c32 1608int
e87a358a 1609Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1610{
14a5cf38
JH
1611 if (f) {
1612 if (*f) {
de009b76 1613 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1614
1615 if (tab && tab->Flush)
f62ce20a 1616 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH
1617 else
1618 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH
1619 }
1620 else {
fe5a182c 1621 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1622 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1623 return -1;
1624 }
1625 }
1626 else {
1627 /*
1628 * Is it good API design to do flush-all on NULL, a potentially
1629 * errorneous input? Maybe some magical value (PerlIO*
1630 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1631 * things on fflush(NULL), but should we be bound by their design
71200d45 1632 * decisions? --jhi
14a5cf38 1633 */
a1ea730d 1634 PerlIO **table = &PL_perlio;
14a5cf38
JH
1635 int code = 0;
1636 while ((f = *table)) {
1637 int i;
1638 table = (PerlIO **) (f++);
1639 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1640 if (*f && PerlIO_flush(f) != 0)
1641 code = -1;
1642 f++;
1643 }
1644 }
1645 return code;
1646 }
760ac839
LW
1647}
1648
a9c883f6 1649void
f62ce20a 1650PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1651{
a1ea730d 1652 PerlIO **table = &PL_perlio;
14a5cf38
JH
1653 PerlIO *f;
1654 while ((f = *table)) {
1655 int i;
1656 table = (PerlIO **) (f++);
1657 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1658 if (*f
1659 && (PerlIOBase(f)->
1660 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1661 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1662 PerlIO_flush(f);
1663 f++;
1664 }
a9c883f6 1665 }
a9c883f6
NIS
1666}
1667
06da4f11 1668int
e87a358a 1669Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1670{
b32dd47e 1671 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS
1672}
1673
f3862f8b
NIS
1674int
1675PerlIO_isutf8(PerlIO *f)
1676{
1b7a0411
JH
1677 if (PerlIOValid(f))
1678 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1679 else
1680 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1681
1b7a0411 1682 return -1;
f3862f8b
NIS
1683}
1684
6f9d8c32 1685int
e87a358a 1686Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1687{
b32dd47e 1688 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS
1689}
1690
9e353e3b 1691int
e87a358a 1692Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1693{
b32dd47e 1694 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS
1695}
1696
9e353e3b 1697void
e87a358a 1698Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1699{
b32dd47e 1700 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS
1701}
1702
9e353e3b 1703void
e87a358a 1704Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1705{
b32dd47e 1706 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS
1707}
1708
9e353e3b
NIS
1709int
1710PerlIO_has_base(PerlIO *f)
1711{
1b7a0411 1712 if (PerlIOValid(f)) {
de009b76 1713 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1714
1715 if (tab)
1716 return (tab->Get_base != NULL);
1717 SETERRNO(EINVAL, LIB_INVARG);
1718 }
1719 else
1720 SETERRNO(EBADF, SS_IVCHAN);
1721
1722 return 0;
760ac839
LW
1723}
1724
9e353e3b
NIS
1725int
1726PerlIO_fast_gets(PerlIO *f)
760ac839 1727{
04892f78 1728 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
de009b76 1729 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1730
1731 if (tab)
1732 return (tab->Set_ptrcnt != NULL);
1733 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1734 }
1b7a0411
JH
1735 else
1736 SETERRNO(EBADF, SS_IVCHAN);
1737
14a5cf38 1738 return 0;
9e353e3b
NIS
1739}
1740
9e353e3b
NIS
1741int
1742PerlIO_has_cntptr(PerlIO *f)
1743{
04892f78 1744 if (PerlIOValid(f)) {
de009b76 1745 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1746
1747 if (tab)
1748 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1749 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1750 }
1b7a0411
JH
1751 else
1752 SETERRNO(EBADF, SS_IVCHAN);
1753
14a5cf38 1754 return 0;
9e353e3b
NIS
1755}
1756
9e353e3b
NIS
1757int
1758PerlIO_canset_cnt(PerlIO *f)
1759{
04892f78 1760 if (PerlIOValid(f)) {
de009b76 1761 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1762
1763 if (tab)
1764 return (tab->Set_ptrcnt != NULL);
1765 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1766 }
1b7a0411
JH
1767 else
1768 SETERRNO(EBADF, SS_IVCHAN);
1769
14a5cf38 1770 return 0;
760ac839
LW
1771}
1772
888911fc 1773STDCHAR *
e87a358a 1774Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1775{
b32dd47e 1776 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS
1777}
1778
9e353e3b 1779int
e87a358a 1780Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1781{
b32dd47e 1782 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS
1783}
1784
9e353e3b 1785STDCHAR *
e87a358a 1786Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1787{
b32dd47e 1788 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS
1789}
1790
05d1247b 1791int
e87a358a 1792Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1793{
b32dd47e 1794 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS
1795}
1796
9e353e3b 1797void
e87a358a 1798Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1799{
b32dd47e 1800 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS
1801}
1802
9e353e3b 1803void
e87a358a 1804Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1805{
b32dd47e 1806 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS
1807}
1808
4ec2216f 1809
9e353e3b 1810/*--------------------------------------------------------------------------------------*/
14a5cf38 1811/*
71200d45 1812 * utf8 and raw dummy layers
14a5cf38 1813 */
dfebf958 1814
26fb694e 1815IV
2dc2558e 1816PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1817{
de009b76
AL
1818 (void)mode;
1819 (void)arg;
00f51856 1820 if (PerlIOValid(f)) {
14a5cf38
JH
1821 if (tab->kind & PERLIO_K_UTF8)
1822 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1823 else
1824 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1825 return 0;
1826 }
1827 return -1;
26fb694e
NIS
1828}
1829
27da23d5 1830PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1831 sizeof(PerlIO_funcs),
14a5cf38 1832 "utf8",
2dc2558e 1833 0,
6874a2de 1834 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1835 PerlIOUtf8_pushed,
1836 NULL,
1837 NULL,
1838 NULL,
1839 NULL,
1840 NULL,
1841 NULL,
1842 NULL,
1843 NULL,
1844 NULL,
1845 NULL,
de009b76
AL
1846 NULL,
1847 NULL,
22569500
NIS
1848 NULL, /* flush */
1849 NULL, /* fill */
14a5cf38
JH
1850 NULL,
1851 NULL,
1852 NULL,
1853 NULL,
22569500
NIS
1854 NULL, /* get_base */
1855 NULL, /* get_bufsiz */
1856 NULL, /* get_ptr */
1857 NULL, /* get_cnt */
1858 NULL, /* set_ptrcnt */
26fb694e
NIS
1859};
1860
27da23d5 1861PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1862 sizeof(PerlIO_funcs),
14a5cf38 1863 "bytes",
2dc2558e 1864 0,
14a5cf38
JH
1865 PERLIO_K_DUMMY,
1866 PerlIOUtf8_pushed,
1867 NULL,
1868 NULL,
1869 NULL,
1870 NULL,
1871 NULL,
1872 NULL,
1873 NULL,
1874 NULL,
1875 NULL,
1876 NULL,
de009b76
AL
1877 NULL,
1878 NULL,
22569500
NIS
1879 NULL, /* flush */
1880 NULL, /* fill */
14a5cf38
JH
1881 NULL,
1882 NULL,
1883 NULL,
1884 NULL,
22569500
NIS
1885 NULL, /* get_base */
1886 NULL, /* get_bufsiz */
1887 NULL, /* get_ptr */
1888 NULL, /* get_cnt */
1889 NULL, /* set_ptrcnt */
dfebf958
NIS
1890};
1891
1892PerlIO *
14a5cf38
JH
1893PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1894 IV n, const char *mode, int fd, int imode, int perm,
1895 PerlIO *old, int narg, SV **args)
dfebf958 1896{
14a5cf38 1897 PerlIO_funcs *tab = PerlIO_default_btm();
de009b76 1898 (void)self;
210e727c
JH
1899 if (tab && tab->Open)
1900 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1901 old, narg, args);
1902 SETERRNO(EINVAL, LIB_INVARG);
1903 return NULL;
dfebf958
NIS
1904}
1905
27da23d5 1906PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1907 sizeof(PerlIO_funcs),
14a5cf38 1908 "raw",
2dc2558e 1909 0,
14a5cf38
JH
1910 PERLIO_K_DUMMY,
1911 PerlIORaw_pushed,
1912 PerlIOBase_popped,
1913 PerlIORaw_open,
1914 NULL,
1915 NULL,
1916 NULL,
1917 NULL,
1918 NULL,
1919 NULL,
1920 NULL,
1921 NULL,
de009b76
AL
1922 NULL,
1923 NULL,
22569500
NIS
1924 NULL, /* flush */
1925 NULL, /* fill */
14a5cf38
JH
1926 NULL,
1927 NULL,
1928 NULL,
1929 NULL,
22569500
NIS
1930 NULL, /* get_base */
1931 NULL, /* get_bufsiz */
1932 NULL, /* get_ptr */
1933 NULL, /* get_cnt */
1934 NULL, /* set_ptrcnt */
dfebf958
NIS
1935};
1936/*--------------------------------------------------------------------------------------*/
1937/*--------------------------------------------------------------------------------------*/
14a5cf38 1938/*
71200d45 1939 * "Methods" of the "base class"
14a5cf38 1940 */
9e353e3b
NIS
1941
1942IV
f62ce20a 1943PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1944{
04892f78 1945 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1946}
1947
f5b9d040 1948char *
81428673 1949PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1950{
1951 char *s = buf;
81428673 1952 if (PerlIOValid(f)) {
de009b76 1953 const IV flags = PerlIOBase(f)->flags;
81428673
NIS
1954 if (flags & PERLIO_F_APPEND) {
1955 *s++ = 'a';
1956 if (flags & PERLIO_F_CANREAD) {
1957 *s++ = '+';
1958 }
14a5cf38 1959 }
81428673
NIS
1960 else if (flags & PERLIO_F_CANREAD) {
1961 *s++ = 'r';
1962 if (flags & PERLIO_F_CANWRITE)
1963 *s++ = '+';
1964 }
1965 else if (flags & PERLIO_F_CANWRITE) {
1966 *s++ = 'w';
1967 if (flags & PERLIO_F_CANREAD) {
1968 *s++ = '+';
1969 }
14a5cf38 1970 }
35990314 1971#ifdef PERLIO_USING_CRLF
81428673
NIS
1972 if (!(flags & PERLIO_F_CRLF))
1973 *s++ = 'b';
5f1a76d0 1974#endif
81428673 1975 }
14a5cf38
JH
1976 *s = '\0';
1977 return buf;
f5b9d040
NIS
1978}
1979
81428673 1980
76ced9ad 1981IV
2dc2558e 1982PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 1983{
de009b76
AL
1984 PerlIOl * const l = PerlIOBase(f);
1985 (void)arg;
1986
14a5cf38
JH
1987 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1988 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1989 if (tab->Set_ptrcnt != NULL)
1990 l->flags |= PERLIO_F_FASTGETS;
1991 if (mode) {
3b6c1aba 1992 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH
1993 mode++;
1994 switch (*mode++) {
1995 case 'r':
1996 l->flags |= PERLIO_F_CANREAD;
1997 break;
1998 case 'a':
1999 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2000 break;
2001 case 'w':
2002 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2003 break;
2004 default:
93189314 2005 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2006 return -1;
2007 }
2008 while (*mode) {
2009 switch (*mode++) {
2010 case '+':
2011 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2012 break;
2013 case 'b':
2014 l->flags &= ~PERLIO_F_CRLF;
2015 break;
2016 case 't':
2017 l->flags |= PERLIO_F_CRLF;
2018 break;
2019 default:
93189314 2020 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2021 return -1;
2022 }
2023 }
2024 }
2025 else {
2026 if (l->next) {
2027 l->flags |= l->next->flags &
2028 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2029 PERLIO_F_APPEND);
2030 }
2031 }
5e2ab84b 2032#if 0
14a5cf38
JH
2033 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2034 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2035 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 2036#endif
14a5cf38 2037 return 0;
76ced9ad
NIS
2038}
2039
2040IV
f62ce20a 2041PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2042{
de009b76 2043 (void)f;
14a5cf38 2044 return 0;
760ac839
LW
2045}
2046
9e353e3b 2047SSize_t
f62ce20a 2048PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2049{
14a5cf38 2050 /*
71200d45 2051 * Save the position as current head considers it
14a5cf38 2052 */
de009b76 2053 const Off_t old = PerlIO_tell(f);
27da23d5 2054 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", Nullsv);
14a5cf38 2055 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2056 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS
2057}
2058
f6c77cf1 2059SSize_t
f62ce20a 2060PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2061{
14a5cf38
JH
2062 STDCHAR *buf = (STDCHAR *) vbuf;
2063 if (f) {
263df5f1
JH
2064 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2065 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2066 SETERRNO(EBADF, SS_IVCHAN);
2067 return 0;
2068 }
14a5cf38
JH
2069 while (count > 0) {
2070 SSize_t avail = PerlIO_get_cnt(f);
2071 SSize_t take = 0;
2072 if (avail > 0)
eb160463 2073 take = ((SSize_t)count < avail) ? count : avail;
14a5cf38
JH
2074 if (take > 0) {
2075 STDCHAR *ptr = PerlIO_get_ptr(f);
2076 Copy(ptr, buf, take, STDCHAR);
2077 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2078 count -= take;
2079 buf += take;
2080 }
2081 if (count > 0 && avail <= 0) {
2082 if (PerlIO_fill(f) != 0)
2083 break;
2084 }
2085 }
2086 return (buf - (STDCHAR *) vbuf);
2087 }
f6c77cf1 2088 return 0;
f6c77cf1
NIS
2089}
2090
9e353e3b 2091IV
f62ce20a 2092PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2093{
de009b76 2094 (void)f;
14a5cf38 2095 return 0;
9e353e3b
NIS
2096}
2097
2098IV
f62ce20a 2099PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2100{
de009b76 2101 (void)f;
14a5cf38 2102 return -1;
06da4f11
NIS
2103}
2104
2105IV
f62ce20a 2106PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2107{
37725cdc
NIS
2108 IV code = -1;
2109 if (PerlIOValid(f)) {
2110 PerlIO *n = PerlIONext(f);
2111 code = PerlIO_flush(f);
2112 PerlIOBase(f)->flags &=
2113 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2114 while (PerlIOValid(n)) {
de009b76 2115 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS
2116 if (tab && tab->Close) {
2117 if ((*tab->Close)(aTHX_ n) != 0)
2118 code = -1;
2119 break;
2120 }
2121 else {
2122 PerlIOBase(n)->flags &=
2123 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2124 }
2125 n = PerlIONext(n);
2126 }
2127 }
2128 else {
2129 SETERRNO(EBADF, SS_IVCHAN);
2130 }
14a5cf38 2131 return code;
9e353e3b
NIS
2132}
2133
2134IV
f62ce20a 2135PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2136{
04892f78 2137 if (PerlIOValid(f)) {
14a5cf38
JH
2138 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2139 }
2140 return 1;
9e353e3b
NIS
2141}
2142
2143IV
f62ce20a 2144PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2145{
04892f78 2146 if (PerlIOValid(f)) {
14a5cf38
JH
2147 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2148 }
2149 return 1;
9e353e3b
NIS
2150}
2151
2152void
f62ce20a 2153PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2154{
04892f78 2155 if (PerlIOValid(f)) {
14a5cf38
JH
2156 PerlIO *n = PerlIONext(f);
2157 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2158 if (PerlIOValid(n))
14a5cf38
JH
2159 PerlIO_clearerr(n);
2160 }
9e353e3b
NIS
2161}
2162
2163void
f62ce20a 2164PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2165{
04892f78 2166 if (PerlIOValid(f)) {
14a5cf38
JH
2167 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2168 }
9e353e3b
NIS
2169}
2170
93a8090d
NIS
2171SV *
2172PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2173{
2174 if (!arg)
2175 return Nullsv;
2176#ifdef sv_dup
2177 if (param) {
2178 return sv_dup(arg, param);
2179 }
2180 else {
2181 return newSVsv(arg);
2182 }
2183#else
1b6737cc 2184 PERL_UNUSED_ARG(param);
93a8090d
NIS
2185 return newSVsv(arg);
2186#endif
2187}
2188
2189PerlIO *
ecdeb87c 2190PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d 2191{
1b6737cc 2192 PerlIO * const nexto = PerlIONext(o);
04892f78 2193 if (PerlIOValid(nexto)) {
de009b76 2194 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS
2195 if (tab && tab->Dup)
2196 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2197 else
2198 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2199 }
2200 if (f) {
2201 PerlIO_funcs *self = PerlIOBase(o)->tab;
210e727c 2202 SV *arg;
93a8090d 2203 char buf[8];
fe5a182c
JH
2204 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2205 self->name, (void*)f, (void*)o, (void*)param);
210e727c
JH
2206 if (self->Getarg)
2207 arg = (*self->Getarg)(aTHX_ o, param, flags);
2208 else {
37725cdc 2209 arg = Nullsv;
93a8090d
NIS
2210 }
2211 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2212 if (arg) {
93a8090d
NIS
2213 SvREFCNT_dec(arg);
2214 }
2215 }
2216 return f;
2217}
2218
168d5872 2219#ifdef USE_THREADS
93a8090d 2220perl_mutex PerlIO_mutex;
93a8090d 2221#endif
27da23d5
JH
2222
2223/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d
NIS
2224
2225void
2226PerlIO_init(pTHX)
2227{
2228 /* Place holder for stdstreams call ??? */
168d5872 2229#ifdef USE_THREADS
27da23d5 2230 MUTEX_INIT(&PerlIO_mutex);
93a8090d
NIS
2231#endif
2232}
2233
168d5872
NIS
2234void
2235PerlIOUnix_refcnt_inc(int fd)
2236{
27da23d5 2237 dTHX;
168d5872
NIS
2238 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2239#ifdef USE_THREADS
2240 MUTEX_LOCK(&PerlIO_mutex);
2241#endif
27da23d5
JH
2242 PL_perlio_fd_refcnt[fd]++;
2243 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
168d5872
NIS
2244#ifdef USE_THREADS
2245 MUTEX_UNLOCK(&PerlIO_mutex);
2246#endif
2247 }
2248}
2249
168d5872
NIS
2250int
2251PerlIOUnix_refcnt_dec(int fd)
2252{
27da23d5 2253 dTHX;
168d5872
NIS
2254 int cnt = 0;
2255 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2256#ifdef USE_THREADS
2257 MUTEX_LOCK(&PerlIO_mutex);
2258#endif
27da23d5 2259 cnt = --PL_perlio_fd_refcnt[fd];
168d5872
NIS
2260 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2261#ifdef USE_THREADS
2262 MUTEX_UNLOCK(&PerlIO_mutex);
2263#endif
2264 }
2265 return cnt;
2266}
2267
694c95cf
JH
2268void
2269PerlIO_cleanup(pTHX)
2270{
2271 int i;
2272#ifdef USE_ITHREADS
9f4bd222
NIS
2273 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2274#else
2275 PerlIO_debug("Cleanup layers\n");
694c95cf
JH
2276#endif
2277 /* Raise STDIN..STDERR refcount so we don't close them */
2278 for (i=0; i < 3; i++)
2279 PerlIOUnix_refcnt_inc(i);
2280 PerlIO_cleantable(aTHX_ &PL_perlio);
2281 /* Restore STDIN..STDERR refcount */
2282 for (i=0; i < 3; i++)
2283 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2284
2285 if (PL_known_layers) {
2286 PerlIO_list_free(aTHX_ PL_known_layers);
2287 PL_known_layers = NULL;
2288 }
27da23d5 2289 if (PL_def_layerlist) {
9f4bd222
NIS
2290 PerlIO_list_free(aTHX_ PL_def_layerlist);
2291 PL_def_layerlist = NULL;
2292 }
694c95cf
JH
2293}
2294
2295
2296
9e353e3b 2297/*--------------------------------------------------------------------------------------*/
14a5cf38 2298/*
71200d45 2299 * Bottom-most level for UNIX-like case
14a5cf38 2300 */
9e353e3b 2301
14a5cf38 2302typedef struct {
22569500
NIS
2303 struct _PerlIO base; /* The generic part */
2304 int fd; /* UNIX like file descriptor */
2305 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2306} PerlIOUnix;
2307
6f9d8c32 2308int
9e353e3b 2309PerlIOUnix_oflags(const char *mode)
760ac839 2310{
14a5cf38 2311 int oflags = -1;
3b6c1aba 2312 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH
2313 mode++;
2314 switch (*mode) {
2315 case 'r':
2316 oflags = O_RDONLY;
2317 if (*++mode == '+') {
2318 oflags = O_RDWR;
2319 mode++;
2320 }
2321 break;
2322
2323 case 'w':
2324 oflags = O_CREAT | O_TRUNC;
2325 if (*++mode == '+') {
2326 oflags |= O_RDWR;
2327 mode++;
2328 }
2329 else
2330 oflags |= O_WRONLY;
2331 break;
2332
2333 case 'a':
2334 oflags = O_CREAT | O_APPEND;
2335 if (*++mode == '+') {
2336 oflags |= O_RDWR;
2337 mode++;
2338 }
2339 else
2340 oflags |= O_WRONLY;
2341 break;
2342 }
2343 if (*mode == 'b') {
2344 oflags |= O_BINARY;
2345 oflags &= ~O_TEXT;
2346 mode++;
2347 }
2348 else if (*mode == 't') {
2349 oflags |= O_TEXT;
2350 oflags &= ~O_BINARY;
2351 mode++;
2352 }
2353 /*
71200d45 2354 * Always open in binary mode
14a5cf38
JH
2355 */
2356 oflags |= O_BINARY;
2357 if (*mode || oflags == -1) {
93189314 2358 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2359 oflags = -1;
2360 }
2361 return oflags;
9e353e3b
NIS
2362}
2363
2364IV
f62ce20a 2365PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2366{
14a5cf38 2367 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2368}
2369
aa063c35
NIS
2370static void
2371PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2372{
de009b76 2373 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2374#if defined(WIN32)
aa063c35
NIS
2375 Stat_t st;
2376 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2377 if (!S_ISREG(st.st_mode)) {
aa063c35 2378 PerlIO_debug("%d is not regular file\n",fd);
6caa5a9c
NIS
2379 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2380 }
aa063c35
NIS
2381 else {
2382 PerlIO_debug("%d _is_ a regular file\n",fd);
2383 }
6caa5a9c
NIS
2384 }
2385#endif
aa063c35
NIS
2386 s->fd = fd;
2387 s->oflags = imode;
2388 PerlIOUnix_refcnt_inc(fd);
2389}
2390
2391IV
2392PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2393{
2394 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2395 if (*PerlIONext(f)) {
4b069b44 2396 /* We never call down so do any pending stuff now */
03c0554d 2397 PerlIO_flush(PerlIONext(f));
14a5cf38 2398 /*
71200d45 2399 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2400 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2401 * Should the value on NULL mode be 0 or -1?
14a5cf38 2402 */
acbd16bf 2403 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2404 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH
2405 }
2406 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2407
14a5cf38 2408 return code;
4b803d04
NIS
2409}
2410
c2fcde81
JH
2411IV
2412PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2413{
de009b76 2414 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2415 Off_t new_loc;
c2fcde81
JH
2416 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2417#ifdef ESPIPE
2418 SETERRNO(ESPIPE, LIB_INVARG);
2419#else
2420 SETERRNO(EINVAL, LIB_INVARG);
2421#endif
2422 return -1;
2423 }
0723351e
NC
2424 new_loc = PerlLIO_lseek(fd, offset, whence);
2425 if (new_loc == (Off_t) - 1)
c2fcde81
JH
2426 {
2427 return -1;
2428 }
2429 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2430 return 0;
2431}
2432
9e353e3b 2433PerlIO *
14a5cf38
JH
2434PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2435 IV n, const char *mode, int fd, int imode,
2436 int perm, PerlIO *f, int narg, SV **args)
2437{
d9dac8cd 2438 if (PerlIOValid(f)) {
14a5cf38 2439 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2440 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2441 }
2442 if (narg > 0) {
3b6c1aba 2443 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH
2444 mode++;
2445 else {
2446 imode = PerlIOUnix_oflags(mode);
2447 perm = 0666;
2448 }
2449 if (imode != -1) {
e62f0680 2450 const char *path = SvPV_nolen_const(*args);
14a5cf38
JH
2451 fd = PerlLIO_open3(path, imode, perm);
2452 }
2453 }
2454 if (fd >= 0) {
3b6c1aba 2455 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2456 mode++;
2457 if (!f) {
2458 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2459 }
2460 if (!PerlIOValid(f)) {
a33cf58c
NIS
2461 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2462 return NULL;
2463 }
d9dac8cd 2464 }
aa063c35 2465 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2466 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH
2467 if (*mode == IoTYPE_APPEND)
2468 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH
2469 return f;
2470 }
2471 else {
2472 if (f) {
2473 /*
71200d45 2474 * FIXME: pop layers ???
14a5cf38
JH
2475 */
2476 }
2477 return NULL;
2478 }
9e353e3b
NIS
2479}
2480
71200d45 2481PerlIO *
ecdeb87c 2482PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45
NIS
2483{
2484 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2485 int fd = os->fd;
ecdeb87c
NIS
2486 if (flags & PERLIO_DUP_FD) {
2487 fd = PerlLIO_dup(fd);
2488 }
93a8090d 2489 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
ecdeb87c 2490 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2491 if (f) {
2492 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2493 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS
2494 return f;
2495 }
71200d45
NIS
2496 }
2497 return NULL;
2498}
2499
2500
9e353e3b 2501SSize_t
f62ce20a 2502PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2503{
de009b76 2504 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2505#ifdef PERLIO_STD_SPECIAL
2506 if (fd == 0)
2507 return PERLIO_STD_IN(fd, vbuf, count);
2508#endif
81428673 2509 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2510 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2511 return 0;
1fd8f4ce 2512 }
14a5cf38 2513 while (1) {
b464bac0 2514 const SSize_t len = PerlLIO_read(fd, vbuf, count);
14a5cf38 2515 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2516 if (len < 0) {
2517 if (errno != EAGAIN) {
2518 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2519 }
2520 }
2521 else if (len == 0 && count != 0) {
14a5cf38 2522 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS
2523 SETERRNO(0,0);
2524 }
14a5cf38
JH
2525 return len;
2526 }
2527 PERL_ASYNC_CHECK();
2528 }
b464bac0 2529 /*NOTREACHED*/
9e353e3b
NIS
2530}
2531
2532SSize_t
f62ce20a 2533PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2534{
de009b76 2535 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2536#ifdef PERLIO_STD_SPECIAL
2537 if (fd == 1 || fd == 2)
2538 return PERLIO_STD_OUT(fd, vbuf, count);
2539#endif
14a5cf38 2540 while (1) {
de009b76 2541 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2542 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2543 if (len < 0) {
2544 if (errno != EAGAIN) {
2545 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2546 }
2547 }
14a5cf38
JH
2548 return len;
2549 }
2550 PERL_ASYNC_CHECK();
06da4f11 2551 }
1b6737cc 2552 /*NOTREACHED*/
9e353e3b
NIS
2553}
2554
9e353e3b 2555Off_t
f62ce20a 2556PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2557{
14a5cf38 2558 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2559}
2560
71200d45 2561
9e353e3b 2562IV
f62ce20a 2563PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2564{
de009b76 2565 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2566 int code = 0;
168d5872
NIS
2567 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2568 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2569 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2570 return 0;
22569500 2571 }
93a8090d
NIS
2572 }
2573 else {
93189314 2574 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2575 return -1;
2576 }
14a5cf38
JH
2577 while (PerlLIO_close(fd) != 0) {
2578 if (errno != EINTR) {
2579 code = -1;
2580 break;
2581 }
2582 PERL_ASYNC_CHECK();
2583 }
2584 if (code == 0) {
2585 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2586 }
2587 return code;
9e353e3b
NIS
2588}
2589
27da23d5 2590PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2591 sizeof(PerlIO_funcs),
14a5cf38
JH
2592 "unix",
2593 sizeof(PerlIOUnix),
2594 PERLIO_K_RAW,
2595 PerlIOUnix_pushed,
44798d05 2596 PerlIOBase_popped,
14a5cf38 2597 PerlIOUnix_open,
86e05cf2 2598 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2599 NULL,
2600 PerlIOUnix_fileno,
71200d45 2601 PerlIOUnix_dup,
14a5cf38
JH
2602 PerlIOUnix_read,
2603 PerlIOBase_unread,
2604 PerlIOUnix_write,
2605 PerlIOUnix_seek,
2606 PerlIOUnix_tell,
2607 PerlIOUnix_close,
22569500
NIS
2608 PerlIOBase_noop_ok, /* flush */
2609 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2610 PerlIOBase_eof,
2611 PerlIOBase_error,
2612 PerlIOBase_clearerr,
2613 PerlIOBase_setlinebuf,
22569500
NIS
2614 NULL, /* get_base */
2615 NULL, /* get_bufsiz */
2616 NULL, /* get_ptr */
2617 NULL, /* get_cnt */
2618 NULL, /* set_ptrcnt */
9e353e3b
NIS
2619};
2620
2621/*--------------------------------------------------------------------------------------*/
14a5cf38 2622/*
71200d45 2623 * stdio as a layer
14a5cf38 2624 */
9e353e3b 2625
313e59c8
NIS
2626#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2627/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2628 broken by the last second glibc 2.3 fix
2629 */
2630#define STDIO_BUFFER_WRITABLE
2631#endif
2632
2633
14a5cf38
JH
2634typedef struct {
2635 struct _PerlIO base;
22569500 2636 FILE *stdio; /* The stream */
9e353e3b
NIS
2637} PerlIOStdio;
2638
2639IV
f62ce20a 2640PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2641{
439ba545 2642 FILE *s;
81428673 2643 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
439ba545
NIS
2644 return PerlSIO_fileno(s);
2645 }
2646 errno = EBADF;
2647 return -1;
9e353e3b
NIS
2648}
2649
766a733e 2650char *
14a5cf38
JH
2651PerlIOStdio_mode(const char *mode, char *tmode)
2652{
de009b76 2653 char * const ret = tmode;
a0625d38
SR
2654 if (mode) {
2655 while (*mode) {
2656 *tmode++ = *mode++;
2657 }
14a5cf38 2658 }
95005ad8 2659#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH
2660 *tmode++ = 'b';
2661#endif
14a5cf38
JH
2662 *tmode = '\0';
2663 return ret;
2664}
2665
4b803d04 2666IV
2dc2558e 2667PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2668{
1fd8f4ce
NIS
2669 PerlIO *n;
2670 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2671 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2672 if (toptab == tab) {
2673 /* Top is already stdio - pop self (duplicate) and use original */
2674 PerlIO_pop(aTHX_ f);
2675 return 0;
2676 } else {
de009b76 2677 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS
2678 char tmode[8];
2679 FILE *stdio;
81428673 2680 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2681 mode = PerlIOStdio_mode(mode, tmode)))) {
2682 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2683 /* We never call down so do any pending stuff now */
2684 PerlIO_flush(PerlIONext(f));
81428673 2685 }
1fd8f4ce
NIS
2686 else {
2687 return -1;
2688 }
2689 }
14a5cf38 2690 }
2dc2558e 2691 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2692}
2693
22569500 2694
9e353e3b 2695PerlIO *
4b069b44 2696PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2697{
14a5cf38
JH
2698 dTHX;
2699 PerlIO *f = NULL;
2700 if (stdio) {
22569500 2701 PerlIOStdio *s;
4b069b44
NIS
2702 if (!mode || !*mode) {
2703 /* We need to probe to see how we can open the stream
2704 so start with read/write and then try write and read
2705 we dup() so that we can fclose without loosing the fd.
2706
2707 Note that the errno value set by a failing fdopen
2708 varies between stdio implementations.
2709 */
de009b76 2710 const int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2711 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2712 if (!f2) {
a33cf58c 2713 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2714 }
2715 if (!f2) {
a33cf58c 2716 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2717 }
2718 if (!f2) {
2719 /* Don't seem to be able to open */
2720 PerlLIO_close(fd);
2721 return f;
2722 }
2723 fclose(f2);
22569500 2724 }
27da23d5 2725 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, Nullsv))) {
a33cf58c
NIS
2726 s = PerlIOSelf(f, PerlIOStdio);
2727 s->stdio = stdio;
2728 }
14a5cf38
JH
2729 }
2730 return f;
9e353e3b
NIS
2731}
2732
2733PerlIO *
14a5cf38
JH
2734PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2735 IV n, const char *mode, int fd, int imode,
2736 int perm, PerlIO *f, int narg, SV **args)
2737{
2738 char tmode[8];
d9dac8cd 2739 if (PerlIOValid(f)) {
e62f0680 2740 const char *path = SvPV_nolen_const(*args);
14a5cf38 2741 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2742 FILE *stdio;
2743 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2744 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2745 s->stdio);
2746 if (!s->stdio)
2747 return NULL;
2748 s->stdio = stdio;
1751d015 2749 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2750 return f;
2751 }
2752 else {
2753 if (narg > 0) {
e62f0680 2754 const char *path = SvPV_nolen_const(*args);
3b6c1aba 2755 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
2756 mode++;
2757 fd = PerlLIO_open3(path, imode, perm);
2758 }
2759 else {
95005ad8
GH
2760 FILE *stdio;
2761 bool appended = FALSE;
2762#ifdef __CYGWIN__
2763 /* Cygwin wants its 'b' early. */
2764 appended = TRUE;
2765 mode = PerlIOStdio_mode(mode, tmode);
2766#endif
2767 stdio = PerlSIO_fopen(path, mode);
6f0313ac
JH
2768 if (stdio) {
2769 PerlIOStdio *s;
2770 if (!f) {
2771 f = PerlIO_allocate(aTHX);
2772 }
95005ad8
GH
2773 if (!appended)
2774 mode = PerlIOStdio_mode(mode, tmode);
2775 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2776 if (f) {
6f0313ac
JH
2777 s = PerlIOSelf(f, PerlIOStdio);
2778 s->stdio = stdio;
2779 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2780 }
2781 return f;
2782 }
2783 else {
2784 return NULL;
2785 }
14a5cf38
JH
2786 }
2787 }
2788 if (fd >= 0) {
2789 FILE *stdio = NULL;
2790 int init = 0;
3b6c1aba 2791 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
2792 init = 1;
2793 mode++;
2794 }
2795 if (init) {
2796 switch (fd) {
2797 case 0:
2798 stdio = PerlSIO_stdin;
2799 break;
2800 case 1:
2801 stdio = PerlSIO_stdout;
2802 break;
2803 case 2:
2804 stdio = PerlSIO_stderr;
2805 break;
2806 }
2807 }
2808 else {
2809 stdio = PerlSIO_fdopen(fd, mode =
2810 PerlIOStdio_mode(mode, tmode));
2811 }
2812 if (stdio) {
d9dac8cd
NIS
2813 if (!f) {
2814 f = PerlIO_allocate(aTHX);
2815 }
a33cf58c 2816 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
de009b76 2817 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
a33cf58c
NIS
2818 s->stdio = stdio;
2819 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2820 }
14a5cf38
JH
2821 return f;
2822 }
2823 }
2824 }
ee518936 2825 return NULL;
9e353e3b
NIS
2826}
2827
1751d015 2828PerlIO *
ecdeb87c 2829PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2830{
2831 /* This assumes no layers underneath - which is what
2832 happens, but is not how I remember it. NI-S 2001/10/16
2833 */
ecdeb87c 2834 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2835 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 2836 const int fd = fileno(stdio);
9217ff3f 2837 char mode[8];
ecdeb87c 2838 if (flags & PERLIO_DUP_FD) {
de009b76 2839 const int dfd = PerlLIO_dup(fileno(stdio));
9217ff3f
NIS
2840 if (dfd >= 0) {
2841 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2842 goto set_this;
ecdeb87c
NIS
2843 }
2844 else {
2845 /* FIXME: To avoid messy error recovery if dup fails
2846 re-use the existing stdio as though flag was not set
2847 */
2848 }
2849 }
9217ff3f
NIS
2850 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2851 set_this:
694c95cf
JH
2852 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2853 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
2854 }
2855 return f;
2856}
2857
0d7a5398
NIS
2858static int
2859PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2860{
2861 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 2862 * PerlIO_set_fileno() support from Configure
0d7a5398 2863 */
ef8eacb8
AT
2864# if defined(__UCLIBC__)
2865 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2866 f->__filedes = -1;
2867 return 1;
2868# elif defined(__GLIBC__)
0d7a5398 2869 /* There may be a better way for GLIBC:
37725cdc 2870 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS
2871 */
2872 f->_fileno = -1;
2873 return 1;
2874# elif defined(__sun__)
2875# if defined(_LP64)
2876 /* On solaris, if _LP64 is defined, the FILE structure is this:
2877 *
2878 * struct FILE {
2879 * long __pad[16];
2880 * };
2881 *
37725cdc 2882 * It turns out that the fd is stored in the top 32 bits of
0d7a5398
NIS
2883 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2884 * to contain a pointer or offset into another structure. All the
2885 * remaining fields are zero.
2886 *
2887 * We set the top bits to -1 (0xFFFFFFFF).
2888 */
2889 f->__pad[4] |= 0xffffffff00000000L;
2890 assert(fileno(f) == 0xffffffff);
2891# else /* !defined(_LP64) */
37725cdc
NIS
2892 /* _file is just a unsigned char :-(
2893 Not clear why we dup() rather than using -1
2894 even if that would be treated as 0xFF - so will
0d7a5398
NIS
2895 a dup fail ...
2896 */
673c27c1 2897 f->_file = PerlLIO_dup(fileno(f));
0d7a5398
NIS
2898# endif /* defined(_LP64) */
2899 return 1;
2900# elif defined(__hpux)
2901 f->__fileH = 0xff;
2902 f->__fileL = 0xff;
2903 return 1;
9837d373 2904 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 2905 your platform does not have special entry try this one.
9837d373
NIS
2906 [For OSF only have confirmation for Tru64 (alpha)
2907 but assume other OSFs will be similar.]
37725cdc 2908 */
9837d373 2909# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
2910 f->_file = -1;
2911 return 1;
2912# elif defined(__FreeBSD__)
2913 /* There may be a better way on FreeBSD:
37725cdc
NIS
2914 - we could insert a dummy func in the _close function entry
2915 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
2916 */
2917 f->_file = -1;
0c49ea6a
SU
2918 return 1;
2919# elif defined(__OpenBSD__)
2920 /* There may be a better way on OpenBSD:
2921 - we could insert a dummy func in the _close function entry
2922 f->_close = (int (*)(void *)) dummy_close;
2923 */
2924 f->_file = -1;
0d7a5398 2925 return 1;
59ad941d
IZ
2926# elif defined(__EMX__)
2927 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2928 f->_handle = -1;
2929 return 1;
0d7a5398
NIS
2930# elif defined(__CYGWIN__)
2931 /* There may be a better way on CYGWIN:
37725cdc
NIS
2932 - we could insert a dummy func in the _close function entry
2933 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
2934 */
2935 f->_file = -1;
2936 return 1;
2937# elif defined(WIN32)
2938# if defined(__BORLANDC__)
2939 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
2940# elif defined(UNDER_CE)
2941 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2942 structure at all
2943 */
0d7a5398
NIS
2944# else
2945 f->_file = -1;
2946# endif
2947 return 1;
2948# else
2949#if 0
37725cdc 2950 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 2951 (which isn't thread safe) instead
37725cdc 2952 */
0d7a5398
NIS
2953# error "Don't know how to set FILE.fileno on your platform"
2954#endif
5d7488b2 2955 (void)f;
0d7a5398
NIS
2956 return 0;
2957# endif
2958}
2959
1751d015 2960IV
f62ce20a 2961PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 2962{
1751d015 2963 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
2964 if (!stdio) {
2965 errno = EBADF;
2966 return -1;
2967 }
9217ff3f 2968 else {
de009b76 2969 const int fd = fileno(stdio);
0d7a5398
NIS
2970 int socksfd = 0;
2971 int invalidate = 0;
bbfd922f 2972 IV result = 0;
0d7a5398
NIS
2973 int saveerr = 0;
2974 int dupfd = 0;
2975#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS
2976 /* Socks lib overrides close() but stdio isn't linked to
2977 that library (though we are) - so we must call close()
2978 on sockets on stdio's behalf.
2979 */
0d7a5398
NIS
2980 int optval;
2981 Sock_size_t optlen = sizeof(int);
2982 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2983 socksfd = 1;
37725cdc 2984 invalidate = 1;
0d7a5398
NIS
2985 }
2986#endif
9217ff3f
NIS
2987 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2988 /* File descriptor still in use */
0d7a5398
NIS
2989 invalidate = 1;
2990 socksfd = 0;
37725cdc 2991 }
0d7a5398 2992 if (invalidate) {
37725cdc
NIS
2993 /* For STD* handles don't close the stdio at all
2994 this is because we have shared the FILE * too
0d7a5398
NIS
2995 */
2996 if (stdio == stdin) {
2997 /* Some stdios are buggy fflush-ing inputs */
2998 return 0;
2999 }
3000 else if (stdio == stdout || stdio == stderr) {
9217ff3f
NIS
3001 return PerlIO_flush(f);
3002 }
37725cdc
NIS
3003 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3004 Use Sarathy's trick from maint-5.6 to invalidate the
3005 fileno slot of the FILE *
3006 */
bbfd922f 3007 result = PerlIO_flush(f);
0d7a5398
NIS
3008 saveerr = errno;
3009 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
9217ff3f
NIS
3010 dupfd = PerlLIO_dup(fd);
3011 }
37725cdc 3012 }
0d7a5398 3013 result = PerlSIO_fclose(stdio);
37725cdc
NIS
3014 /* We treat error from stdio as success if we invalidated
3015 errno may NOT be expected EBADF
e8529473
NIS
3016 */
3017 if (invalidate && result != 0) {
0d7a5398
NIS
3018 errno = saveerr;
3019 result = 0;
37725cdc 3020 }
0d7a5398
NIS
3021 if (socksfd) {
3022 /* in SOCKS case let close() determine return value */
3023 result = close(fd);
3024 }
3025 if (dupfd) {
3026 PerlLIO_dup2(dupfd,fd);
8a521f28 3027 PerlLIO_close(dupfd);
9217ff3f
NIS
3028 }
3029 return result;
37725cdc 3030 }
1751d015
NIS
3031}
3032
9e353e3b 3033SSize_t
f62ce20a 3034PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3035{
14a5cf38
JH
3036 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3037 SSize_t got = 0;
4d948241
NIS
3038 for (;;) {
3039 if (count == 1) {
3040 STDCHAR *buf = (STDCHAR *) vbuf;
3041 /*
3042 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3043 * stdio does not do that for fread()
3044 */
de009b76 3045 const int ch = PerlSIO_fgetc(s);
4d948241
NIS
3046 if (ch != EOF) {
3047 *buf = ch;
3048 got = 1;
3049 }
14a5cf38 3050 }
4d948241
NIS
3051 else
3052 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS
3053 if (got == 0 && PerlSIO_ferror(s))
3054 got = -1;
42a7a32f 3055 if (got >= 0 || errno != EINTR)
4d948241
NIS
3056 break;
3057 PERL_ASYNC_CHECK();
42a7a32f 3058 SETERRNO(0,0); /* just in case */
14a5cf38 3059 }
14a5cf38 3060 return got;
9e353e3b
NIS
3061}
3062
3063SSize_t
f62ce20a 3064PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3065{
14a5cf38 3066 SSize_t unread = 0;
93679785
NIS
3067 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3068
313e59c8 3069#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3070 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3071 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3072 STDCHAR *base = PerlIO_get_base(f);
3073 SSize_t cnt = PerlIO_get_cnt(f);
3074 STDCHAR *ptr = PerlIO_get_ptr(f);
3075 SSize_t avail = ptr - base;
3076 if (avail > 0) {
3077 if (avail > count) {
3078 avail = count;
3079 }
3080 ptr -= avail;
3081 Move(buf-avail,ptr,avail,STDCHAR);
3082 count -= avail;
3083 unread += avail;
3084 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
3085 if (PerlSIO_feof(s) && unread >= 0)
3086 PerlSIO_clearerr(s);
3087 }
3088 }
313e59c8
NIS
3089 else
3090#endif
3091 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3092 /* We can get pointer to buffer but not its base
3093 Do ungetc() but check chars are ending up in the
3094 buffer
3095 */
3096 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3097 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3098 while (count > 0) {
de009b76 3099 const int ch = *--buf & 0xFF;
9f7cd136
NIS
3100 if (ungetc(ch,s) != ch) {
3101 /* ungetc did not work */
3102 break;
3103 }
3104 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3105 /* Did not change pointer as expected */
3106 fgetc(s); /* get char back again */
3107 break;
3108 }
3109 /* It worked ! */
3110 count--;
3111 unread++;
93679785
NIS
3112 }
3113 }
3114
3115 if (count > 0) {
3116 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
3117 }
3118 return unread;
9e353e3b
NIS
3119}
3120
3121SSize_t
f62ce20a 3122PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3123{
4d948241
NIS
3124 SSize_t got;
3125 for (;;) {
3126 got = PerlSIO_fwrite(vbuf, 1, count,
3127 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3128 if (got >= 0 || errno != EINTR)
4d948241
NIS
3129 break;
3130 PERL_ASYNC_CHECK();
42a7a32f 3131 SETERRNO(0,0); /* just in case */
4d948241
NIS
3132 }
3133 return got;
9e353e3b
NIS
3134}
3135
94a175e1 3136IV
f62ce20a 3137PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3138{
14a5cf38 3139 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
94a175e1 3140 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
3141}
3142
3143Off_t
f62ce20a 3144PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3145{
14a5cf38 3146 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
94a175e1 3147 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3148}
3149
3150IV
f62ce20a 3151PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3152{
14a5cf38
JH
3153 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3154 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3155 return PerlSIO_fflush(stdio);
3156 }
3157 else {
88b61e10 3158#if 0
14a5cf38
JH
3159 /*
3160 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3161 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3162 * design is to do _this_ but not have layer above flush this
71200d45 3163 * layer read-to-read
14a5cf38
JH
3164 */
3165 /*
71200d45 3166 * Not writeable - sync by attempting a seek
14a5cf38
JH
3167 */
3168 int err = errno;
3169 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3170 errno = err;
88b61e10 3171#endif
14a5cf38
JH
3172 }
3173 return 0;
9e353e3b
NIS
3174}
3175
3176IV
f62ce20a 3177PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3178{
14a5cf38 3179 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3180}
3181
3182IV
f62ce20a 3183PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3184{
263df5f1 3185 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3186}
3187
3188void
f62ce20a 3189PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3190{
14a5cf38 3191 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3192}
3193
3194void
f62ce20a 3195PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b
NIS
3196{
3197#ifdef HAS_SETLINEBUF
14a5cf38 3198 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3199#else
14a5cf38 3200 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS
3201#endif
3202}
3203
3204#ifdef FILE_base
3205STDCHAR *
f62ce20a 3206PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3207{
14a5cf38 3208 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3209 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3210}
3211
3212Size_t
f62ce20a 3213PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3214{
14a5cf38
JH
3215 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3216 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3217}
3218#endif
3219
3220#ifdef USE_STDIO_PTR
3221STDCHAR *
f62ce20a 3222PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3223{
14a5cf38 3224 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3225 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3226}
3227
3228SSize_t
f62ce20a 3229PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3230{
14a5cf38
JH
3231 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3232 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3233}
3234
3235void
f62ce20a 3236PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3237{
14a5cf38 3238 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3239 if (ptr != NULL) {
9e353e3b 3240#ifdef STDIO_PTR_LVALUE
22569500 3241 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3242#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3243 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3244 assert(PerlSIO_get_cnt(stdio) == (cnt));
3245 }
9e353e3b
NIS
3246#endif
3247#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3248 /*
71200d45 3249 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3250 */
3251 return;
9e353e3b 3252#endif
22569500 3253#else /* STDIO_PTR_LVALUE */
14a5cf38 3254 PerlProc_abort();
22569500 3255#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3256 }
3257 /*
71200d45 3258 * Now (or only) set cnt
14a5cf38 3259 */
9e353e3b 3260#ifdef STDIO_CNT_LVALUE
14a5cf38 3261 PerlSIO_set_cnt(stdio, cnt);
22569500 3262#else /* STDIO_CNT_LVALUE */
9e353e3b 3263#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3264 PerlSIO_set_ptr(stdio,
3265 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3266 cnt));
22569500 3267#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3268 PerlProc_abort();
22569500
NIS
3269#endif /* STDIO_PTR_LVAL_SETS_CNT */
3270#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3271}
3272
93679785 3273
9e353e3b
NIS
3274#endif
3275
93679785
NIS
3276IV
3277PerlIOStdio_fill(pTHX_ PerlIO *f)
3278{
3279 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3280 int c;
3281 /*
3282 * fflush()ing read-only streams can cause trouble on some stdio-s
3283 */
3284 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3285 if (PerlSIO_fflush(stdio) != 0)
3286 return EOF;
3287 }
3288 c = PerlSIO_fgetc(stdio);
3289 if (c == EOF)
3290 return EOF;
3291
3292#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3293
3294#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3295 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3296 /* Fake ungetc() to the real buffer in case system's ungetc
3297 goes elsewhere
3298 */
3299 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3300 SSize_t cnt = PerlSIO_get_cnt(stdio);
3301 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3302 if (ptr == base+1) {
3303 *--ptr = (STDCHAR) c;
3304 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3305 if (PerlSIO_feof(stdio))
3306 PerlSIO_clearerr(stdio);
3307 return 0;
3308 }
3309 }
313e59c8
NIS
3310 else
3311#endif
3312 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3313 STDCHAR ch = c;
3314 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3315 return 0;
3316 }
3317 }
93679785
NIS
3318#endif
3319
3320#if defined(VMS)
3321 /* An ungetc()d char is handled separately from the regular
3322 * buffer, so we stuff it in the buffer ourselves.
3323 * Should never get called as should hit code above
3324 */
bad9695d
NIS
3325 *(--((*stdio)->_ptr)) = (unsigned char) c;
3326 (*stdio)->_cnt++;
93679785
NIS
3327#else
3328 /* If buffer snoop scheme above fails fall back to
9f7cd136 3329 using ungetc().
93679785
NIS
3330 */
3331 if (PerlSIO_ungetc(c, stdio) != c)
3332 return EOF;
3333#endif
3334 return 0;
3335}
3336
3337
3338
27da23d5 3339PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3340 sizeof(PerlIO_funcs),
14a5cf38
JH
3341 "stdio",
3342 sizeof(PerlIOStdio),
86e05cf2 3343 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3344 PerlIOStdio_pushed,
44798d05 3345 PerlIOBase_popped,
14a5cf38 3346 PerlIOStdio_open,
86e05cf2 3347 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3348 NULL,
3349 PerlIOStdio_fileno,
71200d45 3350 PerlIOStdio_dup,
14a5cf38
JH
3351 PerlIOStdio_read,
3352 PerlIOStdio_unread,
3353 PerlIOStdio_write,
3354 PerlIOStdio_seek,
3355 PerlIOStdio_tell,
3356 PerlIOStdio_close,
3357 PerlIOStdio_flush,
3358 PerlIOStdio_fill,
3359 PerlIOStdio_eof,
3360 PerlIOStdio_error,
3361 PerlIOStdio_clearerr,
3362 PerlIOStdio_setlinebuf,
9e353e3b 3363#ifdef FILE_base
14a5cf38
JH
3364 PerlIOStdio_get_base,
3365 PerlIOStdio_get_bufsiz,
9e353e3b 3366#else
14a5cf38
JH
3367 NULL,
3368 NULL,
9e353e3b
NIS
3369#endif
3370#ifdef USE_STDIO_PTR
14a5cf38
JH
3371 PerlIOStdio_get_ptr,
3372 PerlIOStdio_get_cnt,
15b61c98 3373# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3374 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3375# else
3376 NULL,
3377# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3378#else
3379 NULL,
14a5cf38
JH
3380 NULL,
3381 NULL,
15b61c98 3382#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3383};
3384
b9d6bf13
JH
3385/* Note that calls to PerlIO_exportFILE() are reversed using
3386 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3387FILE *
81428673 3388PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3389{
e87a358a 3390 dTHX;
81428673
NIS
3391 FILE *stdio = NULL;
3392 if (PerlIOValid(f)) {
3393 char buf[8];
3394 PerlIO_flush(f);
3395 if (!mode || !*mode) {
3396 mode = PerlIO_modestr(f, buf);
3397 }
3398 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3399 if (stdio) {
3400 PerlIOl *l = *f;
9f75cc58 3401 PerlIO *f2;
81428673
NIS
3402 /* De-link any lower layers so new :stdio sticks */
3403 *f = NULL;
27da23d5 3404 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, Nullsv))) {
9f75cc58 3405 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673
NIS
3406 s->stdio = stdio;
3407 /* Link previous lower layers under new one */
3408 *PerlIONext(f) = l;
3409 }
3410 else {
3411 /* restore layers list */
3412 *f = l;
3413 }
a33cf58c 3414 }
14a5cf38
JH
3415 }
3416 return stdio;
9e353e3b
NIS
3417}
3418
81428673 3419
9e353e3b
NIS
3420FILE *
3421PerlIO_findFILE(PerlIO *f)
3422{
14a5cf38
JH
3423 PerlIOl *l = *f;
3424 while (l) {
3425 if (l->tab == &PerlIO_stdio) {
3426 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3427 return s->stdio;
3428 }
3429 l = *PerlIONext(&l);
f7e7eb72 3430 }
4b069b44
NIS
3431 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3432 return PerlIO_exportFILE(f, Nullch);
9e353e3b
NIS
3433}
3434
b9d6bf13 3435/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS
3436void
3437PerlIO_releaseFILE(PerlIO *p, FILE *f)
3438{
27da23d5 3439 dVAR;
22569500
NIS
3440 PerlIOl *l;
3441 while ((l = *p)) {
3442 if (l->tab == &PerlIO_stdio) {
3443 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3444 if (s->stdio == f) {
3445 dTHX;
3446 PerlIO_pop(aTHX_ p);
3447 return;
3448 }
3449 }
3450 p = PerlIONext(p);
3451 }
3452 return;
9e353e3b
NIS
3453}
3454
3455/*--------------------------------------------------------------------------------------*/
14a5cf38 3456/*
71200d45 3457 * perlio buffer layer
14a5cf38 3458 */
9e353e3b 3459
5e2ab84b 3460IV
2dc2558e 3461PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3462{
14a5cf38 3463 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
de009b76 3464 const int fd = PerlIO_fileno(f);
14a5cf38
JH
3465 if (fd >= 0 && PerlLIO_isatty(fd)) {
3466 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3467 }
4b069b44 3468 if (*PerlIONext(f)) {
de009b76 3469 const Off_t posn = PerlIO_tell(PerlIONext(f));
4b069b44
NIS
3470 if (posn != (Off_t) - 1) {
3471 b->posn = posn;
3472 }
14a5cf38 3473 }
2dc2558e 3474 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS
3475}
3476
9e353e3b 3477PerlIO *
14a5cf38
JH
3478PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3479 IV n, const char *mode, int fd, int imode, int perm,
3480 PerlIO *f, int narg, SV **args)
3481{
04892f78 3482 if (PerlIOValid(f)) {
14a5cf38 3483 PerlIO *next = PerlIONext(f);
67363c0d
JH
3484 PerlIO_funcs *tab =
3485 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3486 if (tab && tab->Open)
3487 next =
3488 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3489 next, narg, args);
2dc2558e 3490 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH
3491 return NULL;
3492 }
3493 }
3494 else {
04892f78 3495 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
14a5cf38 3496 int init = 0;
3b6c1aba 3497 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
3498 init = 1;
3499 /*
71200d45 3500 * mode++;
14a5cf38
JH
3501 */
3502 }
67363c0d
JH
3503 if (tab && tab->Open)
3504 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3505 f, narg, args);
3506 else
3507 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 3508 if (f) {
22569500 3509 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
b26b1ab5
NC
3510 /*
3511 * if push fails during open, open fails. close will pop us.
3512 */
3513 PerlIO_close (f);
3514 return NULL;
3515 } else {
3516 fd = PerlIO_fileno(f);
b26b1ab5
NC
3517 if (init && fd == 2) {
3518 /*
3519 * Initial stderr is unbuffered
3520 */
3521 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3522 }
23b84778
IZ
3523#ifdef PERLIO_USING_CRLF
3524# ifdef PERLIO_IS_BINMODE_FD
3525 if (PERLIO_IS_BINMODE_FD(fd))
5c728af0 3526 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
23b84778
IZ
3527 else
3528# endif
3529 /*
3530 * do something about failing setmode()? --jhi
3531 */
3532 PerlLIO_setmode(fd, O_BINARY);
3533#endif
14a5cf38
JH
3534 }
3535 }
ee518936 3536 }
14a5cf38 3537 return f;
9e353e3b
NIS
3538}
3539
14a5cf38
JH
3540/*
3541 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 3542 * read or write state
14a5cf38 3543 */
9e353e3b 3544IV
f62ce20a 3545PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 3546{
14a5cf38
JH
3547 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3548 int code = 0;
04892f78 3549 PerlIO *n = PerlIONext(f);
14a5cf38
JH
3550 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3551 /*
71200d45 3552 * write() the buffer
14a5cf38 3553 */
de009b76
AL
3554 const STDCHAR *buf = b->buf;
3555 const STDCHAR *p = buf;
14a5cf38
JH
3556 while (p < b->ptr) {
3557 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3558 if (count > 0) {
3559 p += count;
3560 }
3561 else if (count < 0 || PerlIO_error(n)) {
3562 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3563 code = -1;
3564 break;
3565 }
3566 }
3567 b->posn += (p - buf);
3568 }
3569 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3570 STDCHAR *buf = PerlIO_get_base(f);
3571 /*
71200d45 3572 * Note position change
14a5cf38
JH
3573 */
3574 b->posn += (b->ptr - buf);
3575 if (b->ptr < b->end) {
4b069b44
NIS
3576 /* We did not consume all of it - try and seek downstream to
3577 our logical position
14a5cf38 3578 */
4b069b44 3579 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
04892f78
NIS
3580 /* Reload n as some layers may pop themselves on seek */
3581 b->posn = PerlIO_tell(n = PerlIONext(f));
14a5cf38 3582 }
ba5c3fe9 3583 else {
4b069b44
NIS
3584 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3585 data is lost for good - so return saying "ok" having undone
3586 the position adjust
3587 */
3588 b->posn -= (b->ptr - buf);
ba5c3fe9
NIS
3589 return code;
3590 }
14a5cf38
JH
3591 }
3592 }
3593 b->ptr = b->end = b->buf;
3594 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
04892f78 3595 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
04892f78 3596 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
14a5cf38
JH
3597 code = -1;
3598 return code;
6f9d8c32
NIS
3599}
3600
06da4f11 3601IV
f62ce20a 3602PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 3603{
14a5cf38
JH
3604 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3605 PerlIO *n = PerlIONext(f);
3606 SSize_t avail;
3607 /*
4b069b44
NIS
3608 * Down-stream flush is defined not to loose read data so is harmless.
3609 * we would not normally be fill'ing if there was data left in anycase.
14a5cf38
JH
3610 */
3611 if (PerlIO_flush(f) != 0)
3612 return -1;
3613 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 3614 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH
3615
3616 if (!b->buf)
22569500 3617 PerlIO_get_base(f); /* allocate via vtable */
14a5cf38
JH
3618
3619 b->ptr = b->end = b->buf;
4b069b44
NIS
3620
3621 if (!PerlIOValid(n)) {
3622 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3623 return -1;
3624 }
3625
14a5cf38
JH
3626 if (PerlIO_fast_gets(n)) {
3627 /*
04892f78 3628 * Layer below is also buffered. We do _NOT_ want to call its
14a5cf38
JH
3629 * ->Rea