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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
166 return 1;
167# endif
168#endif
169}
de009b76 170#endif /* sfio */
60382766 171
06c7082d 172#ifndef O_ACCMODE
22569500 173#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS
174#endif
175
176int
177PerlIO_intmode2str(int rawmode, char *mode, int *writing)
178{
de009b76 179 const int result = rawmode & O_ACCMODE;
06c7082d
NIS
180 int ix = 0;
181 int ptype;
182 switch (result) {
183 case O_RDONLY:
184 ptype = IoTYPE_RDONLY;
185 break;
186 case O_WRONLY:
187 ptype = IoTYPE_WRONLY;
188 break;
189 case O_RDWR:
190 default:
191 ptype = IoTYPE_RDWR;
192 break;
193 }
194 if (writing)
195 *writing = (result != O_RDONLY);
196
197 if (result == O_RDONLY) {
198 mode[ix++] = 'r';
199 }
200#ifdef O_APPEND
201 else if (rawmode & O_APPEND) {
202 mode[ix++] = 'a';
203 if (result != O_WRONLY)
204 mode[ix++] = '+';
205 }
206#endif
207 else {
208 if (result == O_WRONLY)
209 mode[ix++] = 'w';
210 else {
211 mode[ix++] = 'r';
212 mode[ix++] = '+';
213 }
214 }
215 if (rawmode & O_BINARY)
216 mode[ix++] = 'b';
217 mode[ix] = '\0';
218 return ptype;
219}
220
eb73beca
NIS
221#ifndef PERLIO_LAYERS
222int
223PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
224{
6874a2de
NIS
225 if (!names || !*names
226 || strEQ(names, ":crlf")
227 || strEQ(names, ":raw")
228 || strEQ(names, ":bytes")
229 ) {
14a5cf38
JH
230 return 0;
231 }
232 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
233 /*
71200d45 234 * NOTREACHED
14a5cf38
JH
235 */
236 return -1;
eb73beca
NIS
237}
238
13621cfb
NIS
239void
240PerlIO_destruct(pTHX)
241{
242}
243
f5b9d040
NIS
244int
245PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
246{
92bff44d 247#ifdef USE_SFIO
14a5cf38 248 return 1;
92bff44d 249#else
14a5cf38 250 return perlsio_binmode(fp, iotype, mode);
92bff44d 251#endif
f5b9d040 252}
60382766 253
e0fa5af2 254PerlIO *
ecdeb87c 255PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 256{
27da23d5 257#if defined(PERL_MICRO) || defined(SYMBIAN)
0553478e
NIS
258 return NULL;
259#else
260#ifdef PERL_IMPLICIT_SYS
22569500 261 return PerlSIO_fdupopen(f);
0553478e 262#else
30753f56
NIS
263#ifdef WIN32
264 return win32_fdupopen(f);
265#else
e0fa5af2
NIS
266 if (f) {
267 int fd = PerlLIO_dup(PerlIO_fileno(f));
268 if (fd >= 0) {
06c7082d
NIS
269 char mode[8];
270 int omode = fcntl(fd, F_GETFL);
a5936e02
JH
271#ifdef DJGPP
272 omode = djgpp_get_stream_mode(f);
273#endif
06c7082d 274 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 275 /* the r+ is a hack */
06c7082d 276 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS
277 }
278 return NULL;
279 }
280 else {
93189314 281 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 282 }
7114a2d2 283#endif
e0fa5af2 284 return NULL;
0553478e 285#endif
30753f56 286#endif
e0fa5af2
NIS
287}
288
289
14a5cf38 290/*
71200d45 291 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 292 */
ee518936
NIS
293
294PerlIO *
14a5cf38
JH
295PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
296 int imode, int perm, PerlIO *old, int narg, SV **args)
297{
7cf31beb
NIS
298 if (narg) {
299 if (narg > 1) {
3b8752bb 300 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 301 }
14a5cf38
JH
302 if (*args == &PL_sv_undef)
303 return PerlIO_tmpfile();
304 else {
de009b76 305 const char *name = SvPV_nolen(*args);
3b6c1aba 306 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
307 fd = PerlLIO_open3(name, imode, perm);
308 if (fd >= 0)
de009b76 309 return PerlIO_fdopen(fd, mode + 1);
14a5cf38
JH
310 }
311 else if (old) {
312 return PerlIO_reopen(name, mode, old);
313 }
314 else {
315 return PerlIO_open(name, mode);
316 }
317 }
318 }
319 else {
320 return PerlIO_fdopen(fd, (char *) mode);
321 }
322 return NULL;
ee518936
NIS
323}
324
0c4f7ff0
NIS
325XS(XS_PerlIO__Layer__find)
326{
14a5cf38
JH
327 dXSARGS;
328 if (items < 2)
329 Perl_croak(aTHX_ "Usage class->find(name[,load])");
330 else {
de009b76 331 const char *name = SvPV_nolen(ST(1));
14a5cf38
JH
332 ST(0) = (strEQ(name, "crlf")
333 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
334 XSRETURN(1);
335 }
0c4f7ff0
NIS
336}
337
338
339void
340Perl_boot_core_PerlIO(pTHX)
341{
14a5cf38 342 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS
343}
344
ac27b0f5
NIS
345#endif
346
32e30700 347
6f9d8c32 348#ifdef PERLIO_IS_STDIO
760ac839
LW
349
350void
e8632036 351PerlIO_init(pTHX)
760ac839 352{
14a5cf38
JH
353 /*
354 * Does nothing (yet) except force this file to be included in perl
71200d45 355 * binary. That allows this file to force inclusion of other functions
14a5cf38 356 * that may be required by loadable extensions e.g. for
71200d45 357 * FileHandle::tmpfile
14a5cf38 358 */
760ac839
LW
359}
360
33dcbb9a
PP
361#undef PerlIO_tmpfile
362PerlIO *
8ac85365 363PerlIO_tmpfile(void)
33dcbb9a 364{
14a5cf38 365 return tmpfile();
33dcbb9a
PP
366}
367
22569500 368#else /* PERLIO_IS_STDIO */
760ac839
LW
369
370#ifdef USE_SFIO
371
372#undef HAS_FSETPOS
373#undef HAS_FGETPOS
374
14a5cf38
JH
375/*
376 * This section is just to make sure these functions get pulled in from
71200d45 377 * libsfio.a
14a5cf38 378 */
760ac839
LW
379
380#undef PerlIO_tmpfile
381PerlIO *
c78749f2 382PerlIO_tmpfile(void)
760ac839 383{
14a5cf38 384 return sftmp(0);
760ac839
LW
385}
386
387void
e8632036 388PerlIO_init(pTHX)
760ac839 389{
14a5cf38
JH
390 /*
391 * Force this file to be included in perl binary. Which allows this
392 * file to force inclusion of other functions that may be required by
71200d45 393 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 394 */
760ac839 395
14a5cf38 396 /*
71200d45 397 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 398 * results in a lot of lseek()s to regular files and lot of small
71200d45 399 * writes to pipes.
14a5cf38
JH
400 */
401 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW
402}
403
b9d6bf13 404/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 405PerlIO *
4b069b44 406PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 407{
de009b76 408 const int fd = fileno(stdio);
4b069b44 409 if (!mode || !*mode) {
81428673 410 mode = "r+";
4b069b44
NIS
411 }
412 return PerlIO_fdopen(fd, mode);
92bff44d
NIS
413}
414
415FILE *
416PerlIO_findFILE(PerlIO *pio)
417{
de009b76
AL
418 const int fd = PerlIO_fileno(pio);
419 FILE * const f = fdopen(fd, "r+");
14a5cf38
JH
420 PerlIO_flush(pio);
421 if (!f && errno == EINVAL)
422 f = fdopen(fd, "w");
423 if (!f && errno == EINVAL)
424 f = fdopen(fd, "r");
425 return f;
92bff44d
NIS
426}
427
428
22569500 429#else /* USE_SFIO */
6f9d8c32 430/*======================================================================================*/
14a5cf38 431/*
71200d45 432 * Implement all the PerlIO interface ourselves.
9e353e3b 433 */
760ac839 434
76ced9ad
NIS
435#include "perliol.h"
436
14a5cf38
JH
437/*
438 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 439 * files
14a5cf38 440 */
02f66e2f
NIS
441#ifdef I_UNISTD
442#include <unistd.h>
443#endif
06da4f11
NIS
444#ifdef HAS_MMAP
445#include <sys/mman.h>
446#endif
447
6f9d8c32 448void
14a5cf38
JH
449PerlIO_debug(const char *fmt, ...)
450{
14a5cf38
JH
451 va_list ap;
452 dSYS;
453 va_start(ap, fmt);
27da23d5 454 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
de009b76 455 const char *s = PerlEnv_getenv("PERLIO_DEBUG");
14a5cf38 456 if (s && *s)
27da23d5 457 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
14a5cf38 458 else
27da23d5 459 PL_perlio_debug_fd = -1;
14a5cf38 460 }
27da23d5 461 if (PL_perlio_debug_fd > 0) {
14a5cf38 462 dTHX;
de009b76
AL
463 const char *s = CopFILE(PL_curcop);
464 STRLEN len;
70ace5da
NIS
465#ifdef USE_ITHREADS
466 /* Use fixed buffer as sv_catpvf etc. needs SVs */
467 char buffer[1024];
70ace5da
NIS
468 if (!s)
469 s = "(none)";
de009b76 470 len = sprintf(buffer, "%.40s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
70ace5da 471 vsprintf(buffer+len, fmt, ap);
27da23d5 472 PerlLIO_write(PL_perlio_debug_fd, buffer, strlen(buffer));
70ace5da 473#else
14a5cf38 474 SV *sv = newSVpvn("", 0);
14a5cf38
JH
475 if (!s)
476 s = "(none)";
477 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
478 (IV) CopLINE(PL_curcop));
479 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
480
481 s = SvPV(sv, len);
27da23d5 482 PerlLIO_write(PL_perlio_debug_fd, s, len);
14a5cf38 483 SvREFCNT_dec(sv);
70ace5da 484#endif
14a5cf38
JH
485 }
486 va_end(ap);
6f9d8c32
NIS
487}
488
9e353e3b
NIS
489/*--------------------------------------------------------------------------------------*/
490
14a5cf38 491/*
71200d45 492 * Inner level routines
14a5cf38 493 */
9e353e3b 494
14a5cf38 495/*
71200d45 496 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 497 */
05d1247b 498#define PERLIO_TABLE_SIZE 64
6f9d8c32 499
760ac839 500PerlIO *
5f1a76d0 501PerlIO_allocate(pTHX)
6f9d8c32 502{
14a5cf38 503 /*
71200d45 504 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH
505 */
506 PerlIO **last;
507 PerlIO *f;
a1ea730d 508 last = &PL_perlio;
14a5cf38
JH
509 while ((f = *last)) {
510 int i;
511 last = (PerlIO **) (f);
512 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
513 if (!*++f) {
514 return f;
515 }
516 }
517 }
3a1ee7e8 518 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH
519 if (!f) {
520 return NULL;
521 }
522 *last = f;
523 return f + 1;
05d1247b
NIS
524}
525
a1ea730d
NIS
526#undef PerlIO_fdupopen
527PerlIO *
ecdeb87c 528PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 529{
04892f78 530 if (PerlIOValid(f)) {
de009b76 531 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
fe5a182c 532 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
210e727c
JH
533 if (tab && tab->Dup)
534 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
37725cdc
NIS
535 else {
536 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
537 }
a1ea730d 538 }
210e727c
JH
539 else
540 SETERRNO(EBADF, SS_IVCHAN);
541
542 return NULL;
a1ea730d
NIS
543}
544
545void
5f1a76d0 546PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 547{
14a5cf38
JH
548 PerlIO *table = *tablep;
549 if (table) {
550 int i;
551 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
552 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
553 PerlIO *f = table + i;
554 if (*f) {
555 PerlIO_close(f);
556 }
557 }
3a1ee7e8 558 Safefree(table);
14a5cf38 559 *tablep = NULL;
05d1247b 560 }
05d1247b
NIS
561}
562
fcf2db38
NIS
563
564PerlIO_list_t *
3a1ee7e8 565PerlIO_list_alloc(pTHX)
fcf2db38 566{
14a5cf38
JH
567 PerlIO_list_t *list;
568 Newz('L', list, 1, PerlIO_list_t);
569 list->refcnt = 1;
570 return list;
fcf2db38
NIS
571}
572
573void
3a1ee7e8 574PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 575{
14a5cf38
JH
576 if (list) {
577 if (--list->refcnt == 0) {
578 if (list->array) {
14a5cf38
JH
579 IV i;
580 for (i = 0; i < list->cur; i++) {
581 if (list->array[i].arg)
582 SvREFCNT_dec(list->array[i].arg);
583 }
584 Safefree(list->array);
585 }
586 Safefree(list);
587 }
588 }
fcf2db38
NIS
589}
590
591void
3a1ee7e8 592PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 593{
14a5cf38
JH
594 PerlIO_pair_t *p;
595 if (list->cur >= list->len) {
596 list->len += 8;
597 if (list->array)
598 Renew(list->array, list->len, PerlIO_pair_t);
599 else
600 New('l', list->array, list->len, PerlIO_pair_t);
601 }
602 p = &(list->array[list->cur++]);
603 p->funcs = funcs;
604 if ((p->arg = arg)) {
7fc63493 605 (void)SvREFCNT_inc(arg);
14a5cf38 606 }
fcf2db38
NIS
607}
608
3a1ee7e8
NIS
609PerlIO_list_t *
610PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
611{
694c95cf
JH
612 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
613 if (proto) {
614 int i;
615 list = PerlIO_list_alloc(aTHX);
616 for (i=0; i < proto->cur; i++) {
617 SV *arg = Nullsv;
618 if (proto->array[i].arg)
619 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
620 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
621 }
3a1ee7e8
NIS
622 }
623 return list;
624}
4a4a6116 625
05d1247b 626void
3a1ee7e8 627PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 628{
3aaf42a7 629#ifdef USE_ITHREADS
3a1ee7e8
NIS
630 PerlIO **table = &proto->Iperlio;
631 PerlIO *f;
632 PL_perlio = NULL;
633 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
634 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
635 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 636 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS
637 while ((f = *table)) {
638 int i;
639 table = (PerlIO **) (f++);
640 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
641 if (*f) {
93a8090d 642 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
643 }
644 f++;
645 }
646 }
3aaf42a7 647#endif
9a6404c5
DM
648}
649
650void
13621cfb
NIS
651PerlIO_destruct(pTHX)
652{
a1ea730d 653 PerlIO **table = &PL_perlio;
14a5cf38 654 PerlIO *f;
694c95cf
JH
655#ifdef USE_ITHREADS
656 PerlIO_debug("Destruct %p\n",aTHX);
657#endif
14a5cf38
JH
658 while ((f = *table)) {
659 int i;
660 table = (PerlIO **) (f++);
661 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
662 PerlIO *x = f;
663 PerlIOl *l;
664 while ((l = *x)) {
665 if (l->tab->kind & PERLIO_K_DESTRUCT) {
666 PerlIO_debug("Destruct popping %s\n", l->tab->name);
667 PerlIO_flush(x);
668 PerlIO_pop(aTHX_ x);
669 }
670 else {
671 x = PerlIONext(x);
672 }
673 }
674 f++;
675 }
676 }
13621cfb
NIS
677}
678
679void
a999f61b 680PerlIO_pop(pTHX_ PerlIO *f)
760ac839 681{
14a5cf38
JH
682 PerlIOl *l = *f;
683 if (l) {
fe5a182c 684 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
685 if (l->tab->Popped) {
686 /*
687 * If popped returns non-zero do not free its layer structure
688 * it has either done so itself, or it is shared and still in
71200d45 689 * use
14a5cf38 690 */
f62ce20a 691 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
692 return;
693 }
b47cad08 694 *f = l->next;
3a1ee7e8 695 Safefree(l);
a8c08ecd 696 }
6f9d8c32
NIS
697}
698
39f7a870
JH
699/* Return as an array the stack of layers on a filehandle. Note that
700 * the stack is returned top-first in the array, and there are three
701 * times as many array elements as there are layers in the stack: the
702 * first element of a layer triplet is the name, the second one is the
703 * arguments, and the third one is the flags. */
704
705AV *
706PerlIO_get_layers(pTHX_ PerlIO *f)
707{
708 AV *av = newAV();
709
710 if (PerlIOValid(f)) {
39f7a870
JH
711 PerlIOl *l = PerlIOBase(f);
712
713 while (l) {
714 SV *name = l->tab && l->tab->name ?
715 newSVpv(l->tab->name, 0) : &PL_sv_undef;
716 SV *arg = l->tab && l->tab->Getarg ?
717 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
718 av_push(av, name);
719 av_push(av, arg);
720 av_push(av, newSViv((IV)l->flags));
721 l = l->next;
722 }
723 }
724
725 return av;
726}
727
9e353e3b 728/*--------------------------------------------------------------------------------------*/
14a5cf38 729/*
71200d45 730 * XS Interface for perl code
14a5cf38 731 */
9e353e3b 732
fcf2db38 733PerlIO_funcs *
2edd7e44 734PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 735{
27da23d5 736 dVAR;
14a5cf38
JH
737 IV i;
738 if ((SSize_t) len <= 0)
739 len = strlen(name);
3a1ee7e8
NIS
740 for (i = 0; i < PL_known_layers->cur; i++) {
741 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
a9f76400 742 if (memEQ(f->name, name, len) && f->name[len] == 0) {
fe5a182c 743 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
744 return f;
745 }
746 }
3a1ee7e8
NIS
747 if (load && PL_subname && PL_def_layerlist
748 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
749 if (PL_in_load_module) {
750 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
751 return NULL;
752 } else {
753 SV *pkgsv = newSVpvn("PerlIO", 6);
754 SV *layer = newSVpvn(name, len);
c9bca74a
NIS
755 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
756 ENTER;
d7a09b41 757 SAVEINT(PL_in_load_module);
c9bca74a
NIS
758 if (cv) {
759 SAVESPTR(PL_warnhook);
760 PL_warnhook = (SV *) cv;
761 }
d7a09b41
SR
762 PL_in_load_module++;
763 /*
764 * The two SVs are magically freed by load_module
765 */
766 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
767 PL_in_load_module--;
768 LEAVE;
769 return PerlIO_find_layer(aTHX_ name, len, 0);
770 }
14a5cf38
JH
771 }
772 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
773 return NULL;
f3862f8b
NIS
774}
775
2a1bc955 776#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
777
778static int
779perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
780{
14a5cf38
JH
781 if (SvROK(sv)) {
782 IO *io = GvIOn((GV *) SvRV(sv));
783 PerlIO *ifp = IoIFP(io);
784 PerlIO *ofp = IoOFP(io);
785 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
786 }
787 return 0;
b13b2135
NIS
788}
789
790static int
791perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
792{
14a5cf38
JH
793 if (SvROK(sv)) {
794 IO *io = GvIOn((GV *) SvRV(sv));
795 PerlIO *ifp = IoIFP(io);
796 PerlIO *ofp = IoOFP(io);
797 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
798 }
799 return 0;
b13b2135
NIS
800}
801
802static int
803perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
804{
14a5cf38
JH
805 Perl_warn(aTHX_ "clear %" SVf, sv);
806 return 0;
b13b2135
NIS
807}
808
809static int
810perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
811{
14a5cf38
JH
812 Perl_warn(aTHX_ "free %" SVf, sv);
813 return 0;
b13b2135
NIS
814}
815
816MGVTBL perlio_vtab = {
14a5cf38
JH
817 perlio_mg_get,
818 perlio_mg_set,
22569500 819 NULL, /* len */
14a5cf38
JH
820 perlio_mg_clear,
821 perlio_mg_free
b13b2135
NIS
822};
823
824XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
825{
14a5cf38
JH
826 dXSARGS;
827 SV *sv = SvRV(ST(1));
828 AV *av = newAV();
829 MAGIC *mg;
830 int count = 0;
831 int i;
832 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
833 SvRMAGICAL_off(sv);
834 mg = mg_find(sv, PERL_MAGIC_ext);
835 mg->mg_virtual = &perlio_vtab;
836 mg_magical(sv);
837 Perl_warn(aTHX_ "attrib %" SVf, sv);
838 for (i = 2; i < items; i++) {
839 STRLEN len;
840 const char *name = SvPV(ST(i), len);
841 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
842 if (layer) {
843 av_push(av, SvREFCNT_inc(layer));
844 }
845 else {
846 ST(count) = ST(i);
847 count++;
848 }
849 }
850 SvREFCNT_dec(av);
851 XSRETURN(count);
852}
853
22569500 854#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 855
e3f3bf95
NIS
856SV *
857PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 858{
14a5cf38
JH
859 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
860 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
861 return sv;
e3f3bf95
NIS
862}
863
de009b76 864static XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 865{
37725cdc 866 /* This is used as a %SIG{__WARN__} handler to supress warnings
c9bca74a
NIS
867 during loading of layers.
868 */
869 dXSARGS;
870 if (items)
871 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
872 XSRETURN(0);
873}
874
de009b76 875static XS(XS_PerlIO__Layer__find)
0c4f7ff0 876{
14a5cf38
JH
877 dXSARGS;
878 if (items < 2)
879 Perl_croak(aTHX_ "Usage class->find(name[,load])");
880 else {
de009b76
AL
881 STRLEN len;
882 const char *name = SvPV(ST(1), len);
883 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
14a5cf38
JH
884 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
885 ST(0) =
886 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
887 &PL_sv_undef;
888 XSRETURN(1);
889 }
0c4f7ff0
NIS
890}
891
e3f3bf95
NIS
892void
893PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
894{
3a1ee7e8
NIS
895 if (!PL_known_layers)
896 PL_known_layers = PerlIO_list_alloc(aTHX);
897 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
fe5a182c 898 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
899}
900
1141d9f8 901int
fcf2db38 902PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 903{
14a5cf38
JH
904 if (names) {
905 const char *s = names;
906 while (*s) {
907 while (isSPACE(*s) || *s == ':')
908 s++;
909 if (*s) {
910 STRLEN llen = 0;
911 const char *e = s;
912 const char *as = Nullch;
913 STRLEN alen = 0;
914 if (!isIDFIRST(*s)) {
915 /*
916 * Message is consistent with how attribute lists are
917 * passed. Even though this means "foo : : bar" is
71200d45 918 * seen as an invalid separator character.
14a5cf38 919 */
de009b76 920 const char q = ((*s == '\'') ? '"' : '\'');
99ef548b 921 if (ckWARN(WARN_LAYER))
22569500 922 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 923 "Invalid separator character %c%c%c in PerlIO layer specification %s",
1e616cf5 924 q, *s, q, s);
93189314 925 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
926 return -1;
927 }
928 do {
929 e++;
930 } while (isALNUM(*e));
931 llen = e - s;
932 if (*e == '(') {
933 int nesting = 1;
934 as = ++e;
935 while (nesting) {
936 switch (*e++) {
937 case ')':
938 if (--nesting == 0)
939 alen = (e - 1) - as;
940 break;
941 case '(':
942 ++nesting;
943 break;
944 case '\\':
945 /*
946 * It's a nul terminated string, not allowed
947 * to \ the terminating null. Anything other
71200d45 948 * character is passed over.
14a5cf38
JH
949 */
950 if (*e++) {
951 break;
952 }
953 /*
71200d45 954 * Drop through
14a5cf38
JH
955 */
956 case '\0':
957 e--;
22569500
NIS
958 if (ckWARN(WARN_LAYER))
959 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 960 "Argument list not closed for PerlIO layer \"%.*s\"",
14a5cf38
JH
961 (int) (e - s), s);
962 return -1;
963 default:
964 /*
71200d45 965 * boring.
14a5cf38
JH
966 */
967 break;
968 }
969 }
970 }
971 if (e > s) {
de009b76 972 const bool warn_layer = ckWARN(WARN_LAYER);
14a5cf38
JH
973 PerlIO_funcs *layer =
974 PerlIO_find_layer(aTHX_ s, llen, 1);
975 if (layer) {
3a1ee7e8 976 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH
977 (as) ? newSVpvn(as,
978 alen) :
979 &PL_sv_undef);
980 }
981 else {
22569500 982 if (warn_layer)
b4581f09 983 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
14a5cf38
JH
984 (int) llen, s);
985 return -1;
986 }
987 }
988 s = e;
989 }
990 }
991 }
992 return 0;
1141d9f8
NIS
993}
994
dfebf958 995void
fcf2db38 996PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 997{
27da23d5 998 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 999#ifdef PERLIO_USING_CRLF
6ce75a77 1000 tab = &PerlIO_crlf;
846be114 1001#else
6ce75a77 1002 if (PerlIO_stdio.Set_ptrcnt)
22569500 1003 tab = &PerlIO_stdio;
846be114 1004#endif
14a5cf38 1005 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 1006 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 1007 &PL_sv_undef);
dfebf958
NIS
1008}
1009
e3f3bf95 1010SV *
14a5cf38 1011PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 1012{
14a5cf38 1013 return av->array[n].arg;
e3f3bf95
NIS
1014}
1015
f3862f8b 1016PerlIO_funcs *
14a5cf38 1017PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1018{
14a5cf38
JH
1019 if (n >= 0 && n < av->cur) {
1020 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1021 av->array[n].funcs->name);
1022 return av->array[n].funcs;
1023 }
1024 if (!def)
1025 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1026 return def;
e3f3bf95
NIS
1027}
1028
4ec2216f
NIS
1029IV
1030PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1031{
de009b76
AL
1032 (void)mode;
1033 (void)arg;
1034 (void)tab;
4ec2216f
NIS
1035 if (PerlIOValid(f)) {
1036 PerlIO_flush(f);
1037 PerlIO_pop(aTHX_ f);
1038 return 0;
1039 }
1040 return -1;
1041}
1042
27da23d5 1043PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS
1044 sizeof(PerlIO_funcs),
1045 "pop",
1046 0,
1047 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1048 PerlIOPop_pushed,
1049 NULL,
1050 NULL,
1051 NULL,
1052 NULL,
1053 NULL,
1054 NULL,
1055 NULL,
1056 NULL,
1057 NULL,
1058 NULL,
de009b76
AL
1059 NULL,
1060 NULL,
4ec2216f
NIS
1061 NULL, /* flush */
1062 NULL, /* fill */
1063 NULL,
1064 NULL,
1065 NULL,
1066 NULL,
1067 NULL, /* get_base */
1068 NULL, /* get_bufsiz */
1069 NULL, /* get_ptr */
1070 NULL, /* get_cnt */
1071 NULL, /* set_ptrcnt */
1072};
1073
fcf2db38 1074PerlIO_list_t *
e3f3bf95
NIS
1075PerlIO_default_layers(pTHX)
1076{
3a1ee7e8 1077 if (!PL_def_layerlist) {
14a5cf38 1078 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
27da23d5 1079 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1080 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1081 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1082#if defined(WIN32)
27da23d5 1083 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1084#if 0
14a5cf38 1085 osLayer = &PerlIO_win32;
0c4128ad 1086#endif
2f8118af 1087#endif
27da23d5
JH
1088 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1089 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1090 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1091 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
06da4f11 1092#ifdef HAS_MMAP
27da23d5 1093 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
06da4f11 1094#endif
27da23d5
JH
1095 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1096 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1097 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
3a1ee7e8 1098 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1099 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1100 &PL_sv_undef);
1101 if (s) {
3a1ee7e8 1102 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1103 }
1104 else {
3a1ee7e8 1105 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1106 }
1141d9f8 1107 }
3a1ee7e8
NIS
1108 if (PL_def_layerlist->cur < 2) {
1109 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1110 }
3a1ee7e8 1111 return PL_def_layerlist;
e3f3bf95
NIS
1112}
1113
0c4f7ff0
NIS
1114void
1115Perl_boot_core_PerlIO(pTHX)
1116{
1117#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1118 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1119 __FILE__);
0c4f7ff0 1120#endif
14a5cf38 1121 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1122 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1123}
e3f3bf95
NIS
1124
1125PerlIO_funcs *
1126PerlIO_default_layer(pTHX_ I32 n)
1127{
14a5cf38
JH
1128 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1129 if (n < 0)
1130 n += av->cur;
27da23d5 1131 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS
1132}
1133
a999f61b
NIS
1134#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1135#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1136
1137void
1141d9f8 1138PerlIO_stdstreams(pTHX)
60382766 1139{
a1ea730d 1140 if (!PL_perlio) {
14a5cf38
JH
1141 PerlIO_allocate(aTHX);
1142 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1143 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1144 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1145 }
60382766
NIS
1146}
1147
1148PerlIO *
27da23d5 1149PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1150{
2dc2558e
NIS
1151 if (tab->fsize != sizeof(PerlIO_funcs)) {
1152 mismatch:
1153 Perl_croak(aTHX_ "Layer does not match this perl");
1154 }
1155 if (tab->size) {
1156 PerlIOl *l = NULL;
1157 if (tab->size < sizeof(PerlIOl)) {
1158 goto mismatch;
1159 }
1160 /* Real layer with a data area */
1161 Newc('L',l,tab->size,char,PerlIOl);
1162 if (l && f) {
1163 Zero(l, tab->size, char);
1164 l->next = *f;
27da23d5 1165 l->tab = (PerlIO_funcs*) tab;
2dc2558e
NIS
1166 *f = l;
1167 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1168 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1169 if (*l->tab->Pushed &&
27da23d5 1170 (*l->tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
2dc2558e
NIS
1171 PerlIO_pop(aTHX_ f);
1172 return NULL;
1173 }
1174 }
1175 }
1176 else if (f) {
1177 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1178 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1179 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1180 if (tab->Pushed &&
27da23d5 1181 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1182 return NULL;
14a5cf38
JH
1183 }
1184 }
1185 return f;
60382766
NIS
1186}
1187
dfebf958 1188IV
86e05cf2
NIS
1189PerlIOBase_binmode(pTHX_ PerlIO *f)
1190{
1191 if (PerlIOValid(f)) {
1192 /* Is layer suitable for raw stream ? */
1193 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1194 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1195 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1196 }
1197 else {
1198 /* Not suitable - pop it */
1199 PerlIO_pop(aTHX_ f);
1200 }
1201 return 0;
1202 }
1203 return -1;
1204}
1205
1206IV
2dc2558e 1207PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1208{
de009b76
AL
1209 (void)mode;
1210 (void)arg;
1211 (void)tab;
86e05cf2 1212
04892f78 1213 if (PerlIOValid(f)) {
86e05cf2 1214 PerlIO *t;
de009b76 1215 const PerlIOl *l;
14a5cf38 1216 PerlIO_flush(f);
86e05cf2
NIS
1217 /*
1218 * Strip all layers that are not suitable for a raw stream
1219 */
1220 t = f;
1221 while (t && (l = *t)) {
1222 if (l->tab->Binmode) {
1223 /* Has a handler - normal case */
1224 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1225 if (*t == l) {
1226 /* Layer still there - move down a layer */
1227 t = PerlIONext(t);
1228 }
1229 }
1230 else {
1231 return -1;
1232 }
14a5cf38
JH
1233 }
1234 else {
86e05cf2
NIS
1235 /* No handler - pop it */
1236 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1237 }
1238 }
86e05cf2
NIS
1239 if (PerlIOValid(f)) {
1240 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1241 return 0;
1242 }
14a5cf38
JH
1243 }
1244 return -1;
dfebf958
NIS
1245}
1246
ac27b0f5 1247int
14a5cf38 1248PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1249 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1250{
14a5cf38
JH
1251 int code = 0;
1252 while (n < max) {
1253 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1254 if (tab) {
1255 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1256 code = -1;
1257 break;
1258 }
1259 }
1260 n++;
1261 }
1262 return code;
e3f3bf95
NIS
1263}
1264
1265int
ac27b0f5
NIS
1266PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1267{
14a5cf38 1268 int code = 0;
53f1b6d2 1269 if (f && names) {
3a1ee7e8 1270 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1271 code = PerlIO_parse_layers(aTHX_ layers, names);
1272 if (code == 0) {
d9dac8cd 1273 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1274 }
3a1ee7e8 1275 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1276 }
14a5cf38 1277 return code;
ac27b0f5
NIS
1278}
1279
f3862f8b 1280
60382766 1281/*--------------------------------------------------------------------------------------*/
14a5cf38 1282/*
71200d45 1283 * Given the abstraction above the public API functions
14a5cf38 1284 */
60382766
NIS
1285
1286int
f5b9d040 1287PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1288{
14a5cf38 1289 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
fe5a182c 1290 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
14a5cf38 1291 (names) ? names : "(Null)");
03c0554d
NIS
1292 if (names) {
1293 /* Do not flush etc. if (e.g.) switching encodings.
1294 if a pushed layer knows it needs to flush lower layers
1295 (for example :unix which is never going to call them)
1296 it can do the flush when it is pushed.
1297 */
1298 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1299 }
1300 else {
86e05cf2 1301 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1302#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1303 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1304 O_BINARY so we can look for it in mode.
1305 */
1306 if (!(mode & O_BINARY)) {
1307 /* Text mode */
86e05cf2
NIS
1308 /* FIXME?: Looking down the layer stack seems wrong,
1309 but is a way of reaching past (say) an encoding layer
1310 to flip CRLF-ness of the layer(s) below
1311 */
03c0554d
NIS
1312 while (*f) {
1313 /* Perhaps we should turn on bottom-most aware layer
1314 e.g. Ilya's idea that UNIX TTY could serve
1315 */
1316 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1317 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1318 /* Not in text mode - flush any pending stuff and flip it */
1319 PerlIO_flush(f);
1320 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1321 }
1322 /* Only need to turn it on in one layer so we are done */
1323 return TRUE;
ed53a2bb 1324 }
03c0554d 1325 f = PerlIONext(f);
14a5cf38 1326 }
03c0554d
NIS
1327 /* Not finding a CRLF aware layer presumably means we are binary
1328 which is not what was requested - so we failed
1329 We _could_ push :crlf layer but so could caller
1330 */
1331 return FALSE;
14a5cf38 1332 }
6ce75a77 1333#endif
86e05cf2
NIS
1334 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1335 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1336 */
27da23d5 1337 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), Nullch, Nullsv) ? TRUE : FALSE;
14a5cf38 1338 }
f5b9d040
NIS
1339}
1340
f5b9d040 1341int
e87a358a 1342PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1343{
37725cdc
NIS
1344 if (PerlIOValid(f)) {
1345 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1346 if (tab && tab->Close)
1347 return (*tab->Close)(aTHX_ f);
1348 else
1349 return PerlIOBase_close(aTHX_ f);
1350 }
14a5cf38 1351 else {
93189314 1352 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1353 return -1;
1354 }
76ced9ad
NIS
1355}
1356
b931b1d9 1357int
e87a358a 1358Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1359{
de009b76 1360 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS
1361 while (PerlIOValid(f)) {
1362 PerlIO_pop(aTHX_ f);
f6c77cf1 1363 }
14a5cf38 1364 return code;
b931b1d9
NIS
1365}
1366
b931b1d9 1367int
e87a358a 1368Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1369{
b32dd47e 1370 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS
1371}
1372
1141d9f8
NIS
1373static const char *
1374PerlIO_context_layers(pTHX_ const char *mode)
1375{
14a5cf38
JH
1376 const char *type = NULL;
1377 /*
71200d45 1378 * Need to supply default layer info from open.pm
14a5cf38
JH
1379 */
1380 if (PL_curcop) {
1381 SV *layers = PL_curcop->cop_io;
1382 if (layers) {
1383 STRLEN len;
1384 type = SvPV(layers, len);
1385 if (type && mode[0] != 'r') {
1386 /*
71200d45 1387 * Skip to write part
14a5cf38
JH
1388 */
1389 const char *s = strchr(type, 0);
eb160463 1390 if (s && (STRLEN)(s - type) < len) {
14a5cf38
JH
1391 type = s + 1;
1392 }
1393 }
1394 }
1395 }
1396 return type;
1141d9f8
NIS
1397}
1398
fcf2db38 1399static PerlIO_funcs *
2edd7e44
NIS
1400PerlIO_layer_from_ref(pTHX_ SV *sv)
1401{
14a5cf38 1402 /*
71200d45 1403 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH
1404 */
1405 if (SvTYPE(sv) < SVt_PVAV)
e934609f 1406 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
14a5cf38
JH
1407
1408 /*
71200d45 1409 * For other types allow if layer is known but don't try and load it
14a5cf38
JH
1410 */
1411 switch (SvTYPE(sv)) {
1412 case SVt_PVAV:
1413 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1414 case SVt_PVHV:
1415 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1416 case SVt_PVCV:
1417 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1418 case SVt_PVGV:
1419 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1420 }
1421 return NULL;
2edd7e44
NIS
1422}
1423
fcf2db38 1424PerlIO_list_t *
14a5cf38
JH
1425PerlIO_resolve_layers(pTHX_ const char *layers,
1426 const char *mode, int narg, SV **args)
1427{
1428 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1429 int incdef = 1;
a1ea730d 1430 if (!PL_perlio)
14a5cf38
JH
1431 PerlIO_stdstreams(aTHX);
1432 if (narg) {
1433 SV *arg = *args;
1434 /*
71200d45
NIS
1435 * If it is a reference but not an object see if we have a handler
1436 * for it
14a5cf38
JH
1437 */
1438 if (SvROK(arg) && !sv_isobject(arg)) {
1439 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1440 if (handler) {
3a1ee7e8
NIS
1441 def = PerlIO_list_alloc(aTHX);
1442 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1443 incdef = 0;
1444 }
1445 /*
e934609f 1446 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1447 * something sensible else we will just stringfy and open
71200d45 1448 * resulting string.
14a5cf38
JH
1449 */
1450 }
1451 }
1452 if (!layers)
1453 layers = PerlIO_context_layers(aTHX_ mode);
1454 if (layers && *layers) {
1455 PerlIO_list_t *av;
1456 if (incdef) {
de009b76 1457 IV i;
3a1ee7e8 1458 av = PerlIO_list_alloc(aTHX);
14a5cf38 1459 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1460 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH
1461 def->array[i].arg);
1462 }
1463 }
1464 else {
1465 av = def;
1466 }
0cff2cf3
NIS
1467 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1468 return av;
1469 }
1470 else {
1471 PerlIO_list_free(aTHX_ av);
1472 return (PerlIO_list_t *) NULL;
1473 }
14a5cf38
JH
1474 }
1475 else {
1476 if (incdef)
1477 def->refcnt++;
1478 return def;
1479 }
ee518936
NIS
1480}
1481
1482PerlIO *
14a5cf38
JH
1483PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1484 int imode, int perm, PerlIO *f, int narg, SV **args)
1485{
1486 if (!f && narg == 1 && *args == &PL_sv_undef) {
1487 if ((f = PerlIO_tmpfile())) {
1488 if (!layers)
1489 layers = PerlIO_context_layers(aTHX_ mode);
1490 if (layers && *layers)
1491 PerlIO_apply_layers(aTHX_ f, mode, layers);
1492 }
1493 }
1494 else {
de009b76 1495 PerlIO_list_t *layera;
14a5cf38
JH
1496 IV n;
1497 PerlIO_funcs *tab = NULL;
04892f78 1498 if (PerlIOValid(f)) {
14a5cf38 1499 /*
71200d45
NIS
1500 * This is "reopen" - it is not tested as perl does not use it
1501 * yet
14a5cf38
JH
1502 */
1503 PerlIOl *l = *f;
3a1ee7e8 1504 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1505 while (l) {
04892f78
NIS
1506 SV *arg = (l->tab->Getarg)
1507 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1508 : &PL_sv_undef;
3a1ee7e8 1509 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH
1510 l = *PerlIONext(&l);
1511 }
1512 }
1513 else {
1514 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS
1515 if (!layera) {
1516 return NULL;
1517 }
14a5cf38
JH
1518 }
1519 /*
71200d45 1520 * Start at "top" of layer stack
14a5cf38
JH
1521 */
1522 n = layera->cur - 1;
1523 while (n >= 0) {
1524 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1525 if (t && t->Open) {
1526 tab = t;
1527 break;
1528 }
1529 n--;
1530 }
1531 if (tab) {
1532 /*
71200d45 1533 * Found that layer 'n' can do opens - call it
14a5cf38 1534 */
7cf31beb 1535 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1536 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1537 }
14a5cf38 1538 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
fe5a182c
JH
1539 tab->name, layers, mode, fd, imode, perm,
1540 (void*)f, narg, (void*)args);
210e727c
JH
1541 if (tab->Open)
1542 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1543 f, narg, args);
1544 else {
1545 SETERRNO(EINVAL, LIB_INVARG);
1546 f = NULL;
1547 }
14a5cf38
JH
1548 if (f) {
1549 if (n + 1 < layera->cur) {
1550 /*
1551 * More layers above the one that we used to open -
71200d45 1552 * apply them now
14a5cf38 1553 */
d9dac8cd
NIS
1554 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1555 /* If pushing layers fails close the file */
1556 PerlIO_close(f);
14a5cf38
JH
1557 f = NULL;
1558 }
1559 }
1560 }
1561 }
3a1ee7e8 1562 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH
1563 }
1564 return f;
ee518936 1565}
b931b1d9
NIS
1566
1567
9e353e3b 1568SSize_t
e87a358a 1569Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1570{
b32dd47e 1571 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1572}
1573
313ca112 1574SSize_t
e87a358a 1575Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1576{
b32dd47e 1577 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1578}
1579
9e353e3b 1580SSize_t
e87a358a 1581Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1582{
b32dd47e 1583 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1584}
1585
6f9d8c32 1586int
e87a358a 1587Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1588{
b32dd47e 1589 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW
1590}
1591
9e353e3b 1592Off_t
e87a358a 1593Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1594{
b32dd47e 1595 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW
1596}
1597
6f9d8c32 1598int
e87a358a 1599Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1600{
14a5cf38
JH
1601 if (f) {
1602 if (*f) {
de009b76 1603 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1604
1605 if (tab && tab->Flush)
f62ce20a 1606 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH
1607 else
1608 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH
1609 }
1610 else {
fe5a182c 1611 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1612 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1613 return -1;
1614 }
1615 }
1616 else {
1617 /*
1618 * Is it good API design to do flush-all on NULL, a potentially
1619 * errorneous input? Maybe some magical value (PerlIO*
1620 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1621 * things on fflush(NULL), but should we be bound by their design
71200d45 1622 * decisions? --jhi
14a5cf38 1623 */
a1ea730d 1624 PerlIO **table = &PL_perlio;
14a5cf38
JH
1625 int code = 0;
1626 while ((f = *table)) {
1627 int i;
1628 table = (PerlIO **) (f++);
1629 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1630 if (*f && PerlIO_flush(f) != 0)
1631 code = -1;
1632 f++;
1633 }
1634 }
1635 return code;
1636 }
760ac839
LW
1637}
1638
a9c883f6 1639void
f62ce20a 1640PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1641{
a1ea730d 1642 PerlIO **table = &PL_perlio;
14a5cf38
JH
1643 PerlIO *f;
1644 while ((f = *table)) {
1645 int i;
1646 table = (PerlIO **) (f++);
1647 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1648 if (*f
1649 && (PerlIOBase(f)->
1650 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1651 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1652 PerlIO_flush(f);
1653 f++;
1654 }
a9c883f6 1655 }
a9c883f6
NIS
1656}
1657
06da4f11 1658int
e87a358a 1659Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1660{
b32dd47e 1661 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS
1662}
1663
f3862f8b
NIS
1664int
1665PerlIO_isutf8(PerlIO *f)
1666{
1b7a0411
JH
1667 if (PerlIOValid(f))
1668 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1669 else
1670 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1671
1b7a0411 1672 return -1;
f3862f8b
NIS
1673}
1674
6f9d8c32 1675int
e87a358a 1676Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1677{
b32dd47e 1678 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS
1679}
1680
9e353e3b 1681int
e87a358a 1682Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1683{
b32dd47e 1684 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS
1685}
1686
9e353e3b 1687void
e87a358a 1688Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1689{
b32dd47e 1690 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS
1691}
1692
9e353e3b 1693void
e87a358a 1694Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1695{
b32dd47e 1696 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS
1697}
1698
9e353e3b
NIS
1699int
1700PerlIO_has_base(PerlIO *f)
1701{
1b7a0411 1702 if (PerlIOValid(f)) {
de009b76 1703 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1704
1705 if (tab)
1706 return (tab->Get_base != NULL);
1707 SETERRNO(EINVAL, LIB_INVARG);
1708 }
1709 else
1710 SETERRNO(EBADF, SS_IVCHAN);
1711
1712 return 0;
760ac839
LW
1713}
1714
9e353e3b
NIS
1715int
1716PerlIO_fast_gets(PerlIO *f)
760ac839 1717{
04892f78 1718 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
de009b76 1719 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1720
1721 if (tab)
1722 return (tab->Set_ptrcnt != NULL);
1723 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1724 }
1b7a0411
JH
1725 else
1726 SETERRNO(EBADF, SS_IVCHAN);
1727
14a5cf38 1728 return 0;
9e353e3b
NIS
1729}
1730
9e353e3b
NIS
1731int
1732PerlIO_has_cntptr(PerlIO *f)
1733{
04892f78 1734 if (PerlIOValid(f)) {
de009b76 1735 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1736
1737 if (tab)
1738 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1739 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1740 }
1b7a0411
JH
1741 else
1742 SETERRNO(EBADF, SS_IVCHAN);
1743
14a5cf38 1744 return 0;
9e353e3b
NIS
1745}
1746
9e353e3b
NIS
1747int
1748PerlIO_canset_cnt(PerlIO *f)
1749{
04892f78 1750 if (PerlIOValid(f)) {
de009b76 1751 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1752
1753 if (tab)
1754 return (tab->Set_ptrcnt != NULL);
1755 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1756 }
1b7a0411
JH
1757 else
1758 SETERRNO(EBADF, SS_IVCHAN);
1759
14a5cf38 1760 return 0;
760ac839
LW
1761}
1762
888911fc 1763STDCHAR *
e87a358a 1764Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1765{
b32dd47e 1766 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS
1767}
1768
9e353e3b 1769int
e87a358a 1770Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1771{
b32dd47e 1772 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS
1773}
1774
9e353e3b 1775STDCHAR *
e87a358a 1776Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1777{
b32dd47e 1778 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS
1779}
1780
05d1247b 1781int
e87a358a 1782Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1783{
b32dd47e 1784 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS
1785}
1786
9e353e3b 1787void
e87a358a 1788Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1789{
b32dd47e 1790 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS
1791}
1792
9e353e3b 1793void
e87a358a 1794Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1795{
b32dd47e 1796 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS
1797}
1798
4ec2216f 1799
9e353e3b 1800/*--------------------------------------------------------------------------------------*/
14a5cf38 1801/*
71200d45 1802 * utf8 and raw dummy layers
14a5cf38 1803 */
dfebf958 1804
26fb694e 1805IV
2dc2558e 1806PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1807{
de009b76
AL
1808 (void)mode;
1809 (void)arg;
00f51856 1810 if (PerlIOValid(f)) {
14a5cf38
JH
1811 if (tab->kind & PERLIO_K_UTF8)
1812 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1813 else
1814 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1815 return 0;
1816 }
1817 return -1;
26fb694e
NIS
1818}
1819
27da23d5 1820PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1821 sizeof(PerlIO_funcs),
14a5cf38 1822 "utf8",
2dc2558e 1823 0,
6874a2de 1824 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1825 PerlIOUtf8_pushed,
1826 NULL,
1827 NULL,
1828 NULL,
1829 NULL,
1830 NULL,
1831 NULL,
1832 NULL,
1833 NULL,
1834 NULL,
1835 NULL,
de009b76
AL
1836 NULL,
1837 NULL,
22569500
NIS
1838 NULL, /* flush */
1839 NULL, /* fill */
14a5cf38
JH
1840 NULL,
1841 NULL,
1842 NULL,
1843 NULL,
22569500
NIS
1844 NULL, /* get_base */
1845 NULL, /* get_bufsiz */
1846 NULL, /* get_ptr */
1847 NULL, /* get_cnt */
1848 NULL, /* set_ptrcnt */
26fb694e
NIS
1849};
1850
27da23d5 1851PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1852 sizeof(PerlIO_funcs),
14a5cf38 1853 "bytes",
2dc2558e 1854 0,
14a5cf38
JH
1855 PERLIO_K_DUMMY,
1856 PerlIOUtf8_pushed,
1857 NULL,
1858 NULL,
1859 NULL,
1860 NULL,
1861 NULL,
1862 NULL,
1863 NULL,
1864 NULL,
1865 NULL,
1866 NULL,
de009b76
AL
1867 NULL,
1868 NULL,
22569500
NIS
1869 NULL, /* flush */
1870 NULL, /* fill */
14a5cf38
JH
1871 NULL,
1872 NULL,
1873 NULL,
1874 NULL,
22569500
NIS
1875 NULL, /* get_base */
1876 NULL, /* get_bufsiz */
1877 NULL, /* get_ptr */
1878 NULL, /* get_cnt */
1879 NULL, /* set_ptrcnt */
dfebf958
NIS
1880};
1881
1882PerlIO *
14a5cf38
JH
1883PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1884 IV n, const char *mode, int fd, int imode, int perm,
1885 PerlIO *old, int narg, SV **args)
dfebf958 1886{
14a5cf38 1887 PerlIO_funcs *tab = PerlIO_default_btm();
de009b76 1888 (void)self;
210e727c
JH
1889 if (tab && tab->Open)
1890 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1891 old, narg, args);
1892 SETERRNO(EINVAL, LIB_INVARG);
1893 return NULL;
dfebf958
NIS
1894}
1895
27da23d5 1896PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1897 sizeof(PerlIO_funcs),
14a5cf38 1898 "raw",
2dc2558e 1899 0,
14a5cf38
JH
1900 PERLIO_K_DUMMY,
1901 PerlIORaw_pushed,
1902 PerlIOBase_popped,
1903 PerlIORaw_open,
1904 NULL,
1905 NULL,
1906 NULL,
1907 NULL,
1908 NULL,
1909 NULL,
1910 NULL,
1911 NULL,
de009b76
AL
1912 NULL,
1913 NULL,
22569500
NIS
1914 NULL, /* flush */
1915 NULL, /* fill */
14a5cf38
JH
1916 NULL,
1917 NULL,
1918 NULL,
1919 NULL,
22569500
NIS
1920 NULL, /* get_base */
1921 NULL, /* get_bufsiz */
1922 NULL, /* get_ptr */
1923 NULL, /* get_cnt */
1924 NULL, /* set_ptrcnt */
dfebf958
NIS
1925};
1926/*--------------------------------------------------------------------------------------*/
1927/*--------------------------------------------------------------------------------------*/
14a5cf38 1928/*
71200d45 1929 * "Methods" of the "base class"
14a5cf38 1930 */
9e353e3b
NIS
1931
1932IV
f62ce20a 1933PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1934{
04892f78 1935 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1936}
1937
f5b9d040 1938char *
81428673 1939PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1940{
1941 char *s = buf;
81428673 1942 if (PerlIOValid(f)) {
de009b76 1943 const IV flags = PerlIOBase(f)->flags;
81428673
NIS
1944 if (flags & PERLIO_F_APPEND) {
1945 *s++ = 'a';
1946 if (flags & PERLIO_F_CANREAD) {
1947 *s++ = '+';
1948 }
14a5cf38 1949 }
81428673
NIS
1950 else if (flags & PERLIO_F_CANREAD) {
1951 *s++ = 'r';
1952 if (flags & PERLIO_F_CANWRITE)
1953 *s++ = '+';
1954 }
1955 else if (flags & PERLIO_F_CANWRITE) {
1956 *s++ = 'w';
1957 if (flags & PERLIO_F_CANREAD) {
1958 *s++ = '+';
1959 }
14a5cf38 1960 }
35990314 1961#ifdef PERLIO_USING_CRLF
81428673
NIS
1962 if (!(flags & PERLIO_F_CRLF))
1963 *s++ = 'b';
5f1a76d0 1964#endif
81428673 1965 }
14a5cf38
JH
1966 *s = '\0';
1967 return buf;
f5b9d040
NIS
1968}
1969
81428673 1970
76ced9ad 1971IV
2dc2558e 1972PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 1973{
de009b76
AL
1974 PerlIOl * const l = PerlIOBase(f);
1975 (void)arg;
1976
14a5cf38
JH
1977 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1978 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1979 if (tab->Set_ptrcnt != NULL)
1980 l->flags |= PERLIO_F_FASTGETS;
1981 if (mode) {
3b6c1aba 1982 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH
1983 mode++;
1984 switch (*mode++) {
1985 case 'r':
1986 l->flags |= PERLIO_F_CANREAD;
1987 break;
1988 case 'a':
1989 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1990 break;
1991 case 'w':
1992 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1993 break;
1994 default:
93189314 1995 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
1996 return -1;
1997 }
1998 while (*mode) {
1999 switch (*mode++) {
2000 case '+':
2001 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2002 break;
2003 case 'b':
2004 l->flags &= ~PERLIO_F_CRLF;
2005 break;
2006 case 't':
2007 l->flags |= PERLIO_F_CRLF;
2008 break;
2009 default:
93189314 2010 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2011 return -1;
2012 }
2013 }
2014 }
2015 else {
2016 if (l->next) {
2017 l->flags |= l->next->flags &
2018 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2019 PERLIO_F_APPEND);
2020 }
2021 }
5e2ab84b 2022#if 0
14a5cf38
JH
2023 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2024 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2025 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 2026#endif
14a5cf38 2027 return 0;
76ced9ad
NIS
2028}
2029
2030IV
f62ce20a 2031PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2032{
de009b76 2033 (void)f;
14a5cf38 2034 return 0;
760ac839
LW
2035}
2036
9e353e3b 2037SSize_t
f62ce20a 2038PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2039{
14a5cf38 2040 /*
71200d45 2041 * Save the position as current head considers it
14a5cf38 2042 */
de009b76 2043 const Off_t old = PerlIO_tell(f);
27da23d5 2044 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", Nullsv);
14a5cf38 2045 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2046 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS
2047}
2048
f6c77cf1 2049SSize_t
f62ce20a 2050PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2051{
14a5cf38
JH
2052 STDCHAR *buf = (STDCHAR *) vbuf;
2053 if (f) {
263df5f1
JH
2054 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2055 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2056 SETERRNO(EBADF, SS_IVCHAN);
2057 return 0;
2058 }
14a5cf38
JH
2059 while (count > 0) {
2060 SSize_t avail = PerlIO_get_cnt(f);
2061 SSize_t take = 0;
2062 if (avail > 0)
eb160463 2063 take = ((SSize_t)count < avail) ? count : avail;
14a5cf38
JH
2064 if (take > 0) {
2065 STDCHAR *ptr = PerlIO_get_ptr(f);
2066 Copy(ptr, buf, take, STDCHAR);
2067 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2068 count -= take;
2069 buf += take;
2070 }
2071 if (count > 0 && avail <= 0) {
2072 if (PerlIO_fill(f) != 0)
2073 break;
2074 }
2075 }
2076 return (buf - (STDCHAR *) vbuf);
2077 }
f6c77cf1 2078 return 0;
f6c77cf1
NIS
2079}
2080
9e353e3b 2081IV
f62ce20a 2082PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2083{
de009b76 2084 (void)f;
14a5cf38 2085 return 0;
9e353e3b
NIS
2086}
2087
2088IV
f62ce20a 2089PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2090{
de009b76 2091 (void)f;
14a5cf38 2092 return -1;
06da4f11
NIS
2093}
2094
2095IV
f62ce20a 2096PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2097{
37725cdc
NIS
2098 IV code = -1;
2099 if (PerlIOValid(f)) {
2100 PerlIO *n = PerlIONext(f);
2101 code = PerlIO_flush(f);
2102 PerlIOBase(f)->flags &=
2103 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2104 while (PerlIOValid(n)) {
de009b76 2105 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS
2106 if (tab && tab->Close) {
2107 if ((*tab->Close)(aTHX_ n) != 0)
2108 code = -1;
2109 break;
2110 }
2111 else {
2112 PerlIOBase(n)->flags &=
2113 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2114 }
2115 n = PerlIONext(n);
2116 }
2117 }
2118 else {
2119 SETERRNO(EBADF, SS_IVCHAN);
2120 }
14a5cf38 2121 return code;
9e353e3b
NIS
2122}
2123
2124IV
f62ce20a 2125PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2126{
04892f78 2127 if (PerlIOValid(f)) {
14a5cf38
JH
2128 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2129 }
2130 return 1;
9e353e3b
NIS
2131}
2132
2133IV
f62ce20a 2134PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2135{
04892f78 2136 if (PerlIOValid(f)) {
14a5cf38
JH
2137 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2138 }
2139 return 1;
9e353e3b
NIS
2140}
2141
2142void
f62ce20a 2143PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2144{
04892f78 2145 if (PerlIOValid(f)) {
14a5cf38
JH
2146 PerlIO *n = PerlIONext(f);
2147 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2148 if (PerlIOValid(n))
14a5cf38
JH
2149 PerlIO_clearerr(n);
2150 }
9e353e3b
NIS
2151}
2152
2153void
f62ce20a 2154PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2155{
04892f78 2156 if (PerlIOValid(f)) {
14a5cf38
JH
2157 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2158 }
9e353e3b
NIS
2159}
2160
93a8090d
NIS
2161SV *
2162PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2163{
2164 if (!arg)
2165 return Nullsv;
2166#ifdef sv_dup
2167 if (param) {
2168 return sv_dup(arg, param);
2169 }
2170 else {
2171 return newSVsv(arg);
2172 }
2173#else
2174 return newSVsv(arg);
2175#endif
2176}
2177
2178PerlIO *
ecdeb87c 2179PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d
NIS
2180{
2181 PerlIO *nexto = PerlIONext(o);
04892f78 2182 if (PerlIOValid(nexto)) {
de009b76 2183 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS
2184 if (tab && tab->Dup)
2185 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2186 else
2187 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2188 }
2189 if (f) {
2190 PerlIO_funcs *self = PerlIOBase(o)->tab;
210e727c 2191 SV *arg;
93a8090d 2192 char buf[8];
fe5a182c
JH
2193 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2194 self->name, (void*)f, (void*)o, (void*)param);
210e727c
JH
2195 if (self->Getarg)
2196 arg = (*self->Getarg)(aTHX_ o, param, flags);
2197 else {
37725cdc 2198 arg = Nullsv;
93a8090d
NIS
2199 }
2200 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2201 if (arg) {
93a8090d
NIS
2202 SvREFCNT_dec(arg);
2203 }
2204 }
2205 return f;
2206}
2207
168d5872 2208#ifdef USE_THREADS
93a8090d 2209perl_mutex PerlIO_mutex;
93a8090d 2210#endif
27da23d5
JH
2211
2212/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d
NIS
2213
2214void
2215PerlIO_init(pTHX)
2216{
2217 /* Place holder for stdstreams call ??? */
168d5872 2218#ifdef USE_THREADS
27da23d5 2219 MUTEX_INIT(&PerlIO_mutex);
93a8090d
NIS
2220#endif
2221}
2222
168d5872
NIS
2223void
2224PerlIOUnix_refcnt_inc(int fd)
2225{
27da23d5 2226 dTHX;
168d5872
NIS
2227 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2228#ifdef USE_THREADS
2229 MUTEX_LOCK(&PerlIO_mutex);
2230#endif
27da23d5
JH
2231 PL_perlio_fd_refcnt[fd]++;
2232 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
168d5872
NIS
2233#ifdef USE_THREADS
2234 MUTEX_UNLOCK(&PerlIO_mutex);
2235#endif
2236 }
2237}
2238
168d5872
NIS
2239int
2240PerlIOUnix_refcnt_dec(int fd)
2241{
27da23d5 2242 dTHX;
168d5872
NIS
2243 int cnt = 0;
2244 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2245#ifdef USE_THREADS
2246 MUTEX_LOCK(&PerlIO_mutex);
2247#endif
27da23d5 2248 cnt = --PL_perlio_fd_refcnt[fd];
168d5872
NIS
2249 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2250#ifdef USE_THREADS
2251 MUTEX_UNLOCK(&PerlIO_mutex);
2252#endif
2253 }
2254 return cnt;
2255}
2256
694c95cf
JH
2257void
2258PerlIO_cleanup(pTHX)
2259{
2260 int i;
2261#ifdef USE_ITHREADS
9f4bd222
NIS
2262 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2263#else
2264 PerlIO_debug("Cleanup layers\n");
694c95cf
JH
2265#endif
2266 /* Raise STDIN..STDERR refcount so we don't close them */
2267 for (i=0; i < 3; i++)
2268 PerlIOUnix_refcnt_inc(i);
2269 PerlIO_cleantable(aTHX_ &PL_perlio);
2270 /* Restore STDIN..STDERR refcount */
2271 for (i=0; i < 3; i++)
2272 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2273
2274 if (PL_known_layers) {
2275 PerlIO_list_free(aTHX_ PL_known_layers);
2276 PL_known_layers = NULL;
2277 }
27da23d5 2278 if (PL_def_layerlist) {
9f4bd222
NIS
2279 PerlIO_list_free(aTHX_ PL_def_layerlist);
2280 PL_def_layerlist = NULL;
2281 }
694c95cf
JH
2282}
2283
2284
2285
9e353e3b 2286/*--------------------------------------------------------------------------------------*/
14a5cf38 2287/*
71200d45 2288 * Bottom-most level for UNIX-like case
14a5cf38 2289 */
9e353e3b 2290
14a5cf38 2291typedef struct {
22569500
NIS
2292 struct _PerlIO base; /* The generic part */
2293 int fd; /* UNIX like file descriptor */
2294 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2295} PerlIOUnix;
2296
6f9d8c32 2297int
9e353e3b 2298PerlIOUnix_oflags(const char *mode)
760ac839 2299{
14a5cf38 2300 int oflags = -1;
3b6c1aba 2301 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH
2302 mode++;
2303 switch (*mode) {
2304 case 'r':
2305 oflags = O_RDONLY;
2306 if (*++mode == '+') {
2307 oflags = O_RDWR;
2308 mode++;
2309 }
2310 break;
2311
2312 case 'w':
2313 oflags = O_CREAT | O_TRUNC;
2314 if (*++mode == '+') {
2315 oflags |= O_RDWR;
2316 mode++;
2317 }
2318 else
2319 oflags |= O_WRONLY;
2320 break;
2321
2322 case 'a':
2323 oflags = O_CREAT | O_APPEND;
2324 if (*++mode == '+') {
2325 oflags |= O_RDWR;
2326 mode++;
2327 }
2328 else
2329 oflags |= O_WRONLY;
2330 break;
2331 }
2332 if (*mode == 'b') {
2333 oflags |= O_BINARY;
2334 oflags &= ~O_TEXT;
2335 mode++;
2336 }
2337 else if (*mode == 't') {
2338 oflags |= O_TEXT;
2339 oflags &= ~O_BINARY;
2340 mode++;
2341 }
2342 /*
71200d45 2343 * Always open in binary mode
14a5cf38
JH
2344 */
2345 oflags |= O_BINARY;
2346 if (*mode || oflags == -1) {
93189314 2347 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2348 oflags = -1;
2349 }
2350 return oflags;
9e353e3b
NIS
2351}
2352
2353IV
f62ce20a 2354PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2355{
14a5cf38 2356 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2357}
2358
aa063c35
NIS
2359static void
2360PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2361{
de009b76 2362 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2363#if defined(WIN32)
aa063c35
NIS
2364 Stat_t st;
2365 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2366 if (!S_ISREG(st.st_mode)) {
aa063c35 2367 PerlIO_debug("%d is not regular file\n",fd);
6caa5a9c
NIS
2368 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2369 }
aa063c35
NIS
2370 else {
2371 PerlIO_debug("%d _is_ a regular file\n",fd);
2372 }
6caa5a9c
NIS
2373 }
2374#endif
aa063c35
NIS
2375 s->fd = fd;
2376 s->oflags = imode;
2377 PerlIOUnix_refcnt_inc(fd);
2378}
2379
2380IV
2381PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2382{
2383 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2384 if (*PerlIONext(f)) {
4b069b44 2385 /* We never call down so do any pending stuff now */
03c0554d 2386 PerlIO_flush(PerlIONext(f));
14a5cf38 2387 /*
71200d45 2388 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2389 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2390 * Should the value on NULL mode be 0 or -1?
14a5cf38 2391 */
acbd16bf 2392 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2393 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH
2394 }
2395 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2396
14a5cf38 2397 return code;
4b803d04
NIS
2398}
2399
c2fcde81
JH
2400IV
2401PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2402{
de009b76 2403 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2404 Off_t new_loc;
c2fcde81
JH
2405 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2406#ifdef ESPIPE
2407 SETERRNO(ESPIPE, LIB_INVARG);
2408#else
2409 SETERRNO(EINVAL, LIB_INVARG);
2410#endif
2411 return -1;
2412 }
0723351e
NC
2413 new_loc = PerlLIO_lseek(fd, offset, whence);
2414 if (new_loc == (Off_t) - 1)
c2fcde81
JH
2415 {
2416 return -1;
2417 }
2418 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2419 return 0;
2420}
2421
9e353e3b 2422PerlIO *
14a5cf38
JH
2423PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2424 IV n, const char *mode, int fd, int imode,
2425 int perm, PerlIO *f, int narg, SV **args)
2426{
d9dac8cd 2427 if (PerlIOValid(f)) {
14a5cf38 2428 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2429 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2430 }
2431 if (narg > 0) {
3b6c1aba 2432 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH
2433 mode++;
2434 else {
2435 imode = PerlIOUnix_oflags(mode);
2436 perm = 0666;
2437 }
2438 if (imode != -1) {
de009b76 2439 const char *path = SvPV_nolen(*args);
14a5cf38
JH
2440 fd = PerlLIO_open3(path, imode, perm);
2441 }
2442 }
2443 if (fd >= 0) {
3b6c1aba 2444 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2445 mode++;
2446 if (!f) {
2447 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2448 }
2449 if (!PerlIOValid(f)) {
a33cf58c
NIS
2450 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2451 return NULL;
2452 }
d9dac8cd 2453 }
aa063c35 2454 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2455 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH
2456 if (*mode == IoTYPE_APPEND)
2457 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH
2458 return f;
2459 }
2460 else {
2461 if (f) {
2462 /*
71200d45 2463 * FIXME: pop layers ???
14a5cf38
JH
2464 */
2465 }
2466 return NULL;
2467 }
9e353e3b
NIS
2468}
2469
71200d45 2470PerlIO *
ecdeb87c 2471PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45
NIS
2472{
2473 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2474 int fd = os->fd;
ecdeb87c
NIS
2475 if (flags & PERLIO_DUP_FD) {
2476 fd = PerlLIO_dup(fd);
2477 }
93a8090d 2478 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
ecdeb87c 2479 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2480 if (f) {
2481 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2482 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS
2483 return f;
2484 }
71200d45
NIS
2485 }
2486 return NULL;
2487}
2488
2489
9e353e3b 2490SSize_t
f62ce20a 2491PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2492{
de009b76 2493 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2494#ifdef PERLIO_STD_SPECIAL
2495 if (fd == 0)
2496 return PERLIO_STD_IN(fd, vbuf, count);
2497#endif
81428673 2498 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2499 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2500 return 0;
1fd8f4ce 2501 }
14a5cf38
JH
2502 while (1) {
2503 SSize_t len = PerlLIO_read(fd, vbuf, count);
2504 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2505 if (len < 0) {
2506 if (errno != EAGAIN) {
2507 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2508 }
2509 }
2510 else if (len == 0 && count != 0) {
14a5cf38 2511 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS
2512 SETERRNO(0,0);
2513 }
14a5cf38
JH
2514 return len;
2515 }
2516 PERL_ASYNC_CHECK();
2517 }
9e353e3b
NIS
2518}
2519
2520SSize_t
f62ce20a 2521PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2522{
de009b76 2523 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2524#ifdef PERLIO_STD_SPECIAL
2525 if (fd == 1 || fd == 2)
2526 return PERLIO_STD_OUT(fd, vbuf, count);
2527#endif
14a5cf38 2528 while (1) {
de009b76 2529 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2530 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2531 if (len < 0) {
2532 if (errno != EAGAIN) {
2533 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2534 }
2535 }
14a5cf38
JH
2536 return len;
2537 }
2538 PERL_ASYNC_CHECK();
06da4f11 2539 }
9e353e3b
NIS
2540}
2541
9e353e3b 2542Off_t
f62ce20a 2543PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2544{
14a5cf38 2545 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2546}
2547
71200d45 2548
9e353e3b 2549IV
f62ce20a 2550PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2551{
de009b76 2552 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2553 int code = 0;
168d5872
NIS
2554 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2555 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2556 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2557 return 0;
22569500 2558 }
93a8090d
NIS
2559 }
2560 else {
93189314 2561 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2562 return -1;
2563 }
14a5cf38
JH
2564 while (PerlLIO_close(fd) != 0) {
2565 if (errno != EINTR) {
2566 code = -1;
2567 break;
2568 }
2569 PERL_ASYNC_CHECK();
2570 }
2571 if (code == 0) {
2572 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2573 }
2574 return code;
9e353e3b
NIS
2575}
2576
27da23d5 2577PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2578 sizeof(PerlIO_funcs),
14a5cf38
JH
2579 "unix",
2580 sizeof(PerlIOUnix),
2581 PERLIO_K_RAW,
2582 PerlIOUnix_pushed,
44798d05 2583 PerlIOBase_popped,
14a5cf38 2584 PerlIOUnix_open,
86e05cf2 2585 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2586 NULL,
2587 PerlIOUnix_fileno,
71200d45 2588 PerlIOUnix_dup,
14a5cf38
JH
2589 PerlIOUnix_read,
2590 PerlIOBase_unread,
2591 PerlIOUnix_write,
2592 PerlIOUnix_seek,
2593 PerlIOUnix_tell,
2594 PerlIOUnix_close,
22569500
NIS
2595 PerlIOBase_noop_ok, /* flush */
2596 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2597 PerlIOBase_eof,
2598 PerlIOBase_error,
2599 PerlIOBase_clearerr,
2600 PerlIOBase_setlinebuf,
22569500
NIS
2601 NULL, /* get_base */
2602 NULL, /* get_bufsiz */
2603 NULL, /* get_ptr */
2604 NULL, /* get_cnt */
2605 NULL, /* set_ptrcnt */
9e353e3b
NIS
2606};
2607
2608/*--------------------------------------------------------------------------------------*/
14a5cf38 2609/*
71200d45 2610 * stdio as a layer
14a5cf38 2611 */
9e353e3b 2612
313e59c8
NIS
2613#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2614/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2615 broken by the last second glibc 2.3 fix
2616 */
2617#define STDIO_BUFFER_WRITABLE
2618#endif
2619
2620
14a5cf38
JH
2621typedef struct {
2622 struct _PerlIO base;
22569500 2623 FILE *stdio; /* The stream */
9e353e3b
NIS
2624} PerlIOStdio;
2625
2626IV
f62ce20a 2627PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2628{
439ba545 2629 FILE *s;
81428673 2630 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
439ba545
NIS
2631 return PerlSIO_fileno(s);
2632 }
2633 errno = EBADF;
2634 return -1;
9e353e3b
NIS
2635}
2636
766a733e 2637char *
14a5cf38
JH
2638PerlIOStdio_mode(const char *mode, char *tmode)
2639{
de009b76 2640 char * const ret = tmode;
a0625d38
SR
2641 if (mode) {
2642 while (*mode) {
2643 *tmode++ = *mode++;
2644 }
14a5cf38 2645 }
95005ad8 2646#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH
2647 *tmode++ = 'b';
2648#endif
14a5cf38
JH
2649 *tmode = '\0';
2650 return ret;
2651}
2652
4b803d04 2653IV
2dc2558e 2654PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2655{
1fd8f4ce
NIS
2656 PerlIO *n;
2657 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2658 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2659 if (toptab == tab) {
2660 /* Top is already stdio - pop self (duplicate) and use original */
2661 PerlIO_pop(aTHX_ f);
2662 return 0;
2663 } else {
de009b76 2664 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS
2665 char tmode[8];
2666 FILE *stdio;
81428673 2667 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2668 mode = PerlIOStdio_mode(mode, tmode)))) {
2669 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2670 /* We never call down so do any pending stuff now */
2671 PerlIO_flush(PerlIONext(f));
81428673 2672 }
1fd8f4ce
NIS
2673 else {
2674 return -1;
2675 }
2676 }
14a5cf38 2677 }
2dc2558e 2678 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2679}
2680
22569500 2681
9e353e3b 2682PerlIO *
4b069b44 2683PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2684{
14a5cf38
JH
2685 dTHX;
2686 PerlIO *f = NULL;
2687 if (stdio) {
22569500 2688 PerlIOStdio *s;
4b069b44
NIS
2689 if (!mode || !*mode) {
2690 /* We need to probe to see how we can open the stream
2691 so start with read/write and then try write and read
2692 we dup() so that we can fclose without loosing the fd.
2693
2694 Note that the errno value set by a failing fdopen
2695 varies between stdio implementations.
2696 */
de009b76 2697 const int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2698 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2699 if (!f2) {
a33cf58c 2700 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2701 }
2702 if (!f2) {
a33cf58c 2703 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2704 }
2705 if (!f2) {
2706 /* Don't seem to be able to open */
2707 PerlLIO_close(fd);
2708 return f;
2709 }
2710 fclose(f2);
22569500 2711 }
27da23d5 2712 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, Nullsv))) {
a33cf58c
NIS
2713 s = PerlIOSelf(f, PerlIOStdio);
2714 s->stdio = stdio;
2715 }
14a5cf38
JH
2716 }
2717 return f;
9e353e3b
NIS
2718}
2719
2720PerlIO *
14a5cf38
JH
2721PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2722 IV n, const char *mode, int fd, int imode,
2723 int perm, PerlIO *f, int narg, SV **args)
2724{
2725 char tmode[8];
d9dac8cd 2726 if (PerlIOValid(f)) {
de009b76 2727 const char *path = SvPV_nolen(*args);
14a5cf38 2728 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2729 FILE *stdio;
2730 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2731 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2732 s->stdio);
2733 if (!s->stdio)
2734 return NULL;
2735 s->stdio = stdio;
1751d015 2736 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2737 return f;
2738 }
2739 else {
2740 if (narg > 0) {
de009b76 2741 const char *path = SvPV_nolen(*args);
3b6c1aba 2742 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
2743 mode++;
2744 fd = PerlLIO_open3(path, imode, perm);
2745 }
2746 else {
95005ad8
GH
2747 FILE *stdio;
2748 bool appended = FALSE;
2749#ifdef __CYGWIN__
2750 /* Cygwin wants its 'b' early. */
2751 appended = TRUE;
2752 mode = PerlIOStdio_mode(mode, tmode);
2753#endif
2754 stdio = PerlSIO_fopen(path, mode);
6f0313ac
JH
2755 if (stdio) {
2756 PerlIOStdio *s;
2757 if (!f) {
2758 f = PerlIO_allocate(aTHX);
2759 }
95005ad8
GH
2760 if (!appended)
2761 mode = PerlIOStdio_mode(mode, tmode);
2762 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2763 if (f) {
6f0313ac
JH
2764 s = PerlIOSelf(f, PerlIOStdio);
2765 s->stdio = stdio;
2766 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2767 }
2768 return f;
2769 }
2770 else {
2771 return NULL;
2772 }
14a5cf38
JH
2773 }
2774 }
2775 if (fd >= 0) {
2776 FILE *stdio = NULL;
2777 int init = 0;
3b6c1aba 2778 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
2779 init = 1;
2780 mode++;
2781 }
2782 if (init) {
2783 switch (fd) {
2784 case 0:
2785 stdio = PerlSIO_stdin;
2786 break;
2787 case 1:
2788 stdio = PerlSIO_stdout;
2789 break;
2790 case 2:
2791 stdio = PerlSIO_stderr;
2792 break;
2793 }
2794 }
2795 else {
2796 stdio = PerlSIO_fdopen(fd, mode =
2797 PerlIOStdio_mode(mode, tmode));
2798 }
2799 if (stdio) {
d9dac8cd
NIS
2800 if (!f) {
2801 f = PerlIO_allocate(aTHX);
2802 }
a33cf58c 2803 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
de009b76 2804 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
a33cf58c
NIS
2805 s->stdio = stdio;
2806 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2807 }
14a5cf38
JH
2808 return f;
2809 }
2810 }
2811 }
ee518936 2812 return NULL;
9e353e3b
NIS
2813}
2814
1751d015 2815PerlIO *
ecdeb87c 2816PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2817{
2818 /* This assumes no layers underneath - which is what
2819 happens, but is not how I remember it. NI-S 2001/10/16
2820 */
ecdeb87c 2821 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2822 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 2823 const int fd = fileno(stdio);
9217ff3f 2824 char mode[8];
ecdeb87c 2825 if (flags & PERLIO_DUP_FD) {
de009b76 2826 const int dfd = PerlLIO_dup(fileno(stdio));
9217ff3f
NIS
2827 if (dfd >= 0) {
2828 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2829 goto set_this;
ecdeb87c
NIS
2830 }
2831 else {
2832 /* FIXME: To avoid messy error recovery if dup fails
2833 re-use the existing stdio as though flag was not set
2834 */
2835 }
2836 }
9217ff3f
NIS
2837 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2838 set_this:
694c95cf
JH
2839 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2840 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
2841 }
2842 return f;
2843}
2844
0d7a5398
NIS
2845static int
2846PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2847{
2848 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 2849 * PerlIO_set_fileno() support from Configure
0d7a5398 2850 */
ef8eacb8
AT
2851# if defined(__UCLIBC__)
2852 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2853 f->__filedes = -1;
2854 return 1;
2855# elif defined(__GLIBC__)
0d7a5398 2856 /* There may be a better way for GLIBC:
37725cdc 2857 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS
2858 */
2859 f->_fileno = -1;
2860 return 1;
2861# elif defined(__sun__)
2862# if defined(_LP64)
2863 /* On solaris, if _LP64 is defined, the FILE structure is this:
2864 *
2865 * struct FILE {
2866 * long __pad[16];
2867 * };
2868 *
37725cdc 2869 * It turns out that the fd is stored in the top 32 bits of
0d7a5398
NIS
2870 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2871 * to contain a pointer or offset into another structure. All the
2872 * remaining fields are zero.
2873 *
2874 * We set the top bits to -1 (0xFFFFFFFF).
2875 */
2876 f->__pad[4] |= 0xffffffff00000000L;
2877 assert(fileno(f) == 0xffffffff);
2878# else /* !defined(_LP64) */
37725cdc
NIS
2879 /* _file is just a unsigned char :-(
2880 Not clear why we dup() rather than using -1
2881 even if that would be treated as 0xFF - so will
0d7a5398
NIS
2882 a dup fail ...
2883 */
673c27c1 2884 f->_file = PerlLIO_dup(fileno(f));
0d7a5398
NIS
2885# endif /* defined(_LP64) */
2886 return 1;
2887# elif defined(__hpux)
2888 f->__fileH = 0xff;
2889 f->__fileL = 0xff;
2890 return 1;
9837d373 2891 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 2892 your platform does not have special entry try this one.
9837d373
NIS
2893 [For OSF only have confirmation for Tru64 (alpha)
2894 but assume other OSFs will be similar.]
37725cdc 2895 */
9837d373 2896# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
2897 f->_file = -1;
2898 return 1;
2899# elif defined(__FreeBSD__)
2900 /* There may be a better way on FreeBSD:
37725cdc
NIS
2901 - we could insert a dummy func in the _close function entry
2902 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
2903 */
2904 f->_file = -1;
0c49ea6a
SU
2905 return 1;
2906# elif defined(__OpenBSD__)
2907 /* There may be a better way on OpenBSD:
2908 - we could insert a dummy func in the _close function entry
2909 f->_close = (int (*)(void *)) dummy_close;
2910 */
2911 f->_file = -1;
0d7a5398 2912 return 1;
59ad941d
IZ
2913# elif defined(__EMX__)
2914 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2915 f->_handle = -1;
2916 return 1;
0d7a5398
NIS
2917# elif defined(__CYGWIN__)
2918 /* There may be a better way on CYGWIN:
37725cdc
NIS
2919 - we could insert a dummy func in the _close function entry
2920 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
2921 */
2922 f->_file = -1;
2923 return 1;
2924# elif defined(WIN32)
2925# if defined(__BORLANDC__)
2926 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
2927# elif defined(UNDER_CE)
2928 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2929 structure at all
2930 */
0d7a5398
NIS
2931# else
2932 f->_file = -1;
2933# endif
2934 return 1;
2935# else
2936#if 0
37725cdc 2937 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 2938 (which isn't thread safe) instead
37725cdc 2939 */
0d7a5398
NIS
2940# error "Don't know how to set FILE.fileno on your platform"
2941#endif
2942 return 0;
2943# endif
2944}
2945
1751d015 2946IV
f62ce20a 2947PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 2948{
1751d015 2949 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
2950 if (!stdio) {
2951 errno = EBADF;
2952 return -1;
2953 }
9217ff3f 2954 else {
de009b76 2955 const int fd = fileno(stdio);
0d7a5398
NIS
2956 int socksfd = 0;
2957 int invalidate = 0;
bbfd922f 2958 IV result = 0;
0d7a5398
NIS
2959 int saveerr = 0;
2960 int dupfd = 0;
2961#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS
2962 /* Socks lib overrides close() but stdio isn't linked to
2963 that library (though we are) - so we must call close()
2964 on sockets on stdio's behalf.
2965 */
0d7a5398
NIS
2966 int optval;
2967 Sock_size_t optlen = sizeof(int);
2968 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2969 socksfd = 1;
37725cdc 2970 invalidate = 1;
0d7a5398
NIS
2971 }
2972#endif
9217ff3f
NIS
2973 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2974 /* File descriptor still in use */
0d7a5398
NIS
2975 invalidate = 1;
2976 socksfd = 0;
37725cdc 2977 }
0d7a5398 2978 if (invalidate) {
37725cdc
NIS
2979 /* For STD* handles don't close the stdio at all
2980 this is because we have shared the FILE * too
0d7a5398
NIS
2981 */
2982 if (stdio == stdin) {
2983 /* Some stdios are buggy fflush-ing inputs */
2984 return 0;
2985 }
2986 else if (stdio == stdout || stdio == stderr) {
9217ff3f
NIS
2987 return PerlIO_flush(f);
2988 }
37725cdc
NIS
2989 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2990 Use Sarathy's trick from maint-5.6 to invalidate the
2991 fileno slot of the FILE *
2992 */
bbfd922f 2993 result = PerlIO_flush(f);
0d7a5398
NIS
2994 saveerr = errno;
2995 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
9217ff3f
NIS
2996 dupfd = PerlLIO_dup(fd);
2997 }
37725cdc 2998 }
0d7a5398 2999 result = PerlSIO_fclose(stdio);
37725cdc
NIS
3000 /* We treat error from stdio as success if we invalidated
3001 errno may NOT be expected EBADF
e8529473
NIS
3002 */
3003 if (invalidate && result != 0) {
0d7a5398
NIS
3004 errno = saveerr;
3005 result = 0;
37725cdc 3006 }
0d7a5398
NIS
3007 if (socksfd) {
3008 /* in SOCKS case let close() determine return value */
3009 result = close(fd);
3010 }
3011 if (dupfd) {
3012 PerlLIO_dup2(dupfd,fd);
8a521f28 3013 PerlLIO_close(dupfd);
9217ff3f
NIS
3014 }
3015 return result;
37725cdc 3016 }
1751d015
NIS
3017}
3018
9e353e3b 3019SSize_t
f62ce20a 3020PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3021{
14a5cf38
JH
3022 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3023 SSize_t got = 0;
4d948241
NIS
3024 for (;;) {
3025 if (count == 1) {
3026 STDCHAR *buf = (STDCHAR *) vbuf;
3027 /*
3028 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3029 * stdio does not do that for fread()
3030 */
de009b76 3031 const int ch = PerlSIO_fgetc(s);
4d948241
NIS
3032 if (ch != EOF) {
3033 *buf = ch;
3034 got = 1;
3035 }
14a5cf38 3036 }
4d948241
NIS
3037 else
3038 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS
3039 if (got == 0 && PerlSIO_ferror(s))
3040 got = -1;
42a7a32f 3041 if (got >= 0 || errno != EINTR)
4d948241
NIS
3042 break;
3043 PERL_ASYNC_CHECK();
42a7a32f 3044 SETERRNO(0,0); /* just in case */
14a5cf38 3045 }
14a5cf38 3046 return got;
9e353e3b
NIS
3047}
3048
3049SSize_t
f62ce20a 3050PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3051{
14a5cf38 3052 SSize_t unread = 0;
93679785
NIS
3053 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3054
313e59c8 3055#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3056 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3057 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3058 STDCHAR *base = PerlIO_get_base(f);
3059 SSize_t cnt = PerlIO_get_cnt(f);
3060 STDCHAR *ptr = PerlIO_get_ptr(f);
3061 SSize_t avail = ptr - base;
3062 if (avail > 0) {
3063 if (avail > count) {
3064 avail = count;
3065 }
3066 ptr -= avail;
3067 Move(buf-avail,ptr,avail,STDCHAR);
3068 count -= avail;
3069 unread += avail;
3070 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
3071 if (PerlSIO_feof(s) && unread >= 0)
3072 PerlSIO_clearerr(s);
3073 }
3074 }
313e59c8
NIS
3075 else
3076#endif
3077 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3078 /* We can get pointer to buffer but not its base
3079 Do ungetc() but check chars are ending up in the
3080 buffer
3081 */
3082 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3083 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3084 while (count > 0) {
de009b76 3085 const int ch = *--buf & 0xFF;
9f7cd136
NIS
3086 if (ungetc(ch,s) != ch) {
3087 /* ungetc did not work */
3088 break;
3089 }
3090 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3091 /* Did not change pointer as expected */
3092 fgetc(s); /* get char back again */
3093 break;
3094 }
3095 /* It worked ! */
3096 count--;
3097 unread++;
93679785
NIS
3098 }
3099 }
3100
3101 if (count > 0) {
3102 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
3103 }
3104 return unread;
9e353e3b
NIS
3105}
3106
3107SSize_t
f62ce20a 3108PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3109{
4d948241
NIS
3110 SSize_t got;
3111 for (;;) {
3112 got = PerlSIO_fwrite(vbuf, 1, count,
3113 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3114 if (got >= 0 || errno != EINTR)
4d948241
NIS
3115 break;
3116 PERL_ASYNC_CHECK();
42a7a32f 3117 SETERRNO(0,0); /* just in case */
4d948241
NIS
3118 }
3119 return got;
9e353e3b
NIS
3120}
3121
94a175e1 3122IV
f62ce20a 3123PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3124{
14a5cf38 3125 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
94a175e1 3126 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
3127}
3128
3129Off_t
f62ce20a 3130PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3131{
14a5cf38 3132 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
94a175e1 3133 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3134}
3135
3136IV
f62ce20a 3137PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3138{
14a5cf38
JH
3139 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3140 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3141 return PerlSIO_fflush(stdio);
3142 }
3143 else {
88b61e10 3144#if 0
14a5cf38
JH
3145 /*
3146 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3147 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3148 * design is to do _this_ but not have layer above flush this
71200d45 3149 * layer read-to-read
14a5cf38
JH
3150 */
3151 /*
71200d45 3152 * Not writeable - sync by attempting a seek
14a5cf38
JH
3153 */
3154 int err = errno;
3155 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3156 errno = err;
88b61e10 3157#endif
14a5cf38
JH
3158 }
3159 return 0;
9e353e3b
NIS
3160}
3161
3162IV
f62ce20a 3163PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3164{
14a5cf38 3165 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3166}
3167
3168IV
f62ce20a 3169PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3170{
263df5f1 3171 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3172}
3173
3174void
f62ce20a 3175PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3176{
14a5cf38 3177 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3178}
3179
3180void
f62ce20a 3181PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b
NIS
3182{
3183#ifdef HAS_SETLINEBUF
14a5cf38 3184 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3185#else
14a5cf38 3186 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
9e353e3b
NIS
3187#endif
3188}
3189
3190#ifdef FILE_base
3191STDCHAR *
f62ce20a 3192PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3193{
14a5cf38 3194 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3195 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3196}
3197
3198Size_t
f62ce20a 3199PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3200{
14a5cf38
JH
3201 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3202 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3203}
3204#endif
3205
3206#ifdef USE_STDIO_PTR
3207STDCHAR *
f62ce20a 3208PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3209{
14a5cf38 3210 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3211 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3212}
3213
3214SSize_t
f62ce20a 3215PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3216{
14a5cf38
JH
3217 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3218 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3219}
3220
3221void
f62ce20a 3222PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3223{
14a5cf38 3224 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3225 if (ptr != NULL) {
9e353e3b 3226#ifdef STDIO_PTR_LVALUE
22569500 3227 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3228#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3229 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3230 assert(PerlSIO_get_cnt(stdio) == (cnt));
3231 }
9e353e3b
NIS
3232#endif
3233#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3234 /*
71200d45 3235 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3236 */
3237 return;
9e353e3b 3238#endif
22569500 3239#else /* STDIO_PTR_LVALUE */
14a5cf38 3240 PerlProc_abort();
22569500 3241#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3242 }
3243 /*
71200d45 3244 * Now (or only) set cnt
14a5cf38 3245 */
9e353e3b 3246#ifdef STDIO_CNT_LVALUE
14a5cf38 3247 PerlSIO_set_cnt(stdio, cnt);
22569500 3248#else /* STDIO_CNT_LVALUE */
9e353e3b 3249#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3250 PerlSIO_set_ptr(stdio,
3251 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3252 cnt));
22569500 3253#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3254 PerlProc_abort();
22569500
NIS
3255#endif /* STDIO_PTR_LVAL_SETS_CNT */
3256#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3257}
3258
93679785 3259
9e353e3b
NIS
3260#endif
3261
93679785
NIS
3262IV
3263PerlIOStdio_fill(pTHX_ PerlIO *f)
3264{
3265 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3266 int c;
3267 /*
3268 * fflush()ing read-only streams can cause trouble on some stdio-s
3269 */
3270 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3271 if (PerlSIO_fflush(stdio) != 0)
3272 return EOF;
3273 }
3274 c = PerlSIO_fgetc(stdio);
3275 if (c == EOF)
3276 return EOF;
3277
3278#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3279
3280#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3281 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3282 /* Fake ungetc() to the real buffer in case system's ungetc
3283 goes elsewhere
3284 */
3285 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3286 SSize_t cnt = PerlSIO_get_cnt(stdio);
3287 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3288 if (ptr == base+1) {
3289 *--ptr = (STDCHAR) c;
3290 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3291 if (PerlSIO_feof(stdio))
3292 PerlSIO_clearerr(stdio);
3293 return 0;
3294 }
3295 }
313e59c8
NIS
3296 else
3297#endif
3298 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3299 STDCHAR ch = c;
3300 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3301 return 0;
3302 }
3303 }
93679785
NIS
3304#endif
3305
3306#if defined(VMS)
3307 /* An ungetc()d char is handled separately from the regular
3308 * buffer, so we stuff it in the buffer ourselves.
3309 * Should never get called as should hit code above
3310 */
bad9695d
NIS
3311 *(--((*stdio)->_ptr)) = (unsigned char) c;
3312 (*stdio)->_cnt++;
93679785
NIS
3313#else
3314 /* If buffer snoop scheme above fails fall back to
9f7cd136 3315 using ungetc().
93679785
NIS
3316 */
3317 if (PerlSIO_ungetc(c, stdio) != c)
3318 return EOF;
3319#endif
3320 return 0;
3321}
3322
3323
3324
27da23d5 3325PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3326 sizeof(PerlIO_funcs),
14a5cf38
JH
3327 "stdio",
3328 sizeof(PerlIOStdio),
86e05cf2 3329 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3330 PerlIOStdio_pushed,
44798d05 3331 PerlIOBase_popped,
14a5cf38 3332 PerlIOStdio_open,
86e05cf2 3333 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3334 NULL,
3335 PerlIOStdio_fileno,
71200d45 3336 PerlIOStdio_dup,
14a5cf38
JH
3337 PerlIOStdio_read,
3338 PerlIOStdio_unread,
3339 PerlIOStdio_write,
3340 PerlIOStdio_seek,
3341 PerlIOStdio_tell,
3342 PerlIOStdio_close,
3343 PerlIOStdio_flush,
3344 PerlIOStdio_fill,
3345 PerlIOStdio_eof,
3346 PerlIOStdio_error,
3347 PerlIOStdio_clearerr,
3348 PerlIOStdio_setlinebuf,
9e353e3b 3349#ifdef FILE_base
14a5cf38
JH
3350 PerlIOStdio_get_base,
3351 PerlIOStdio_get_bufsiz,
9e353e3b 3352#else
14a5cf38
JH
3353 NULL,
3354 NULL,
9e353e3b
NIS
3355#endif
3356#ifdef USE_STDIO_PTR
14a5cf38
JH
3357 PerlIOStdio_get_ptr,
3358 PerlIOStdio_get_cnt,
15b61c98 3359# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3360 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3361# else
3362 NULL,
3363# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3364#else
3365 NULL,
14a5cf38
JH
3366 NULL,
3367 NULL,
15b61c98 3368#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3369};
3370
b9d6bf13
JH
3371/* Note that calls to PerlIO_exportFILE() are reversed using
3372 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3373FILE *
81428673 3374PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3375{
e87a358a 3376 dTHX;
81428673
NIS
3377 FILE *stdio = NULL;
3378 if (PerlIOValid(f)) {
3379 char buf[8];
3380 PerlIO_flush(f);
3381 if (!mode || !*mode) {
3382 mode = PerlIO_modestr(f, buf);
3383 }
3384 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3385 if (stdio) {
3386 PerlIOl *l = *f;
9f75cc58 3387 PerlIO *f2;
81428673
NIS
3388 /* De-link any lower layers so new :stdio sticks */
3389 *f = NULL;
27da23d5 3390 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, Nullsv))) {
9f75cc58 3391 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673
NIS
3392 s->stdio = stdio;
3393 /* Link previous lower layers under new one */
3394 *PerlIONext(f) = l;
3395 }
3396 else {
3397 /* restore layers list */
3398 *f = l;
3399 }
a33cf58c 3400 }
14a5cf38
JH
3401 }
3402 return stdio;
9e353e3b
NIS
3403}
3404
81428673 3405
9e353e3b
NIS
3406FILE *
3407PerlIO_findFILE(PerlIO *f)
3408{
14a5cf38
JH
3409 PerlIOl *l = *f;
3410 while (l) {
3411 if (l->tab == &PerlIO_stdio) {
3412 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3413 return s->stdio;
3414 }
3415 l = *PerlIONext(&l);
f7e7eb72 3416 }
4b069b44
NIS
3417 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3418 return PerlIO_exportFILE(f, Nullch);
9e353e3b
NIS
3419}
3420
b9d6bf13 3421/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS
3422void
3423PerlIO_releaseFILE(PerlIO *p, FILE *f)
3424{
27da23d5 3425 dVAR;
22569500
NIS
3426 PerlIOl *l;
3427 while ((l = *p)) {
3428 if (l->tab == &PerlIO_stdio) {
3429 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3430 if (s->stdio == f) {
3431 dTHX;
3432 PerlIO_pop(aTHX_ p);
3433 return;
3434 }
3435 }
3436 p = PerlIONext(p);
3437 }
3438 return;
9e353e3b
NIS
3439}
3440
3441/*--------------------------------------------------------------------------------------*/
14a5cf38 3442/*
71200d45 3443 * perlio buffer layer
14a5cf38 3444 */
9e353e3b 3445
5e2ab84b 3446IV
2dc2558e 3447PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3448{
14a5cf38 3449 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
de009b76 3450 const int fd = PerlIO_fileno(f);
14a5cf38
JH
3451 if (fd >= 0 && PerlLIO_isatty(fd)) {
3452 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3453 }
4b069b44 3454 if (*PerlIONext(f)) {
de009b76 3455 const Off_t posn = PerlIO_tell(PerlIONext(f));
4b069b44
NIS
3456 if (posn != (Off_t) - 1) {
3457 b->posn = posn;
3458 }
14a5cf38 3459 }
2dc2558e 3460 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS
3461}
3462
9e353e3b 3463PerlIO *
14a5cf38
JH
3464PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3465 IV n, const char *mode, int fd, int imode, int perm,
3466 PerlIO *f, int narg, SV **args)
3467{
04892f78 3468 if (PerlIOValid(f)) {
14a5cf38 3469 PerlIO *next = PerlIONext(f);
67363c0d
JH
3470 PerlIO_funcs *tab =
3471 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3472 if (tab && tab->Open)
3473 next =
3474 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3475 next, narg, args);
2dc2558e 3476 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH
3477 return NULL;
3478 }
3479 }
3480 else {
04892f78 3481 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
14a5cf38 3482 int init = 0;
3b6c1aba 3483 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
3484 init = 1;
3485 /*
71200d45 3486 * mode++;
14a5cf38
JH
3487 */
3488 }
67363c0d
JH
3489 if (tab && tab->Open)
3490 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3491 f, narg, args);
3492 else
3493 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 3494 if (f) {
22569500 3495 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
b26b1ab5
NC
3496 /*
3497 * if push fails during open, open fails. close will pop us.
3498 */
3499 PerlIO_close (f);
3500 return NULL;
3501 } else {
3502 fd = PerlIO_fileno(f);
b26b1ab5
NC
3503 if (init && fd == 2) {
3504 /*
3505 * Initial stderr is unbuffered
3506 */
3507 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3508 }
23b84778
IZ
3509#ifdef PERLIO_USING_CRLF
3510# ifdef PERLIO_IS_BINMODE_FD
3511 if (PERLIO_IS_BINMODE_FD(fd))
5c728af0 3512 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
23b84778
IZ
3513 else
3514# endif
3515 /*
3516 * do something about failing setmode()? --jhi
3517 */
3518 PerlLIO_setmode(fd, O_BINARY);
3519#endif
14a5cf38
JH
3520 }
3521 }
ee518936 3522 }
14a5cf38 3523 return f;
9e353e3b
NIS
3524}
3525
14a5cf38
JH
3526/*
3527 * This "flush" is akin to sfio's sync in that it handles files in either
71200d45 3528 * read or write state
14a5cf38 3529 */
9e353e3b 3530IV
f62ce20a 3531PerlIOBuf_flush(pTHX_ PerlIO *f)
6f9d8c32 3532{
14a5cf38
JH
3533 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3534 int code = 0;
04892f78 3535 PerlIO *n = PerlIONext(f);
14a5cf38
JH
3536 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3537 /*
71200d45 3538 * write() the buffer
14a5cf38 3539 */
de009b76
AL
3540 const STDCHAR *buf = b->buf;
3541 const STDCHAR *p = buf;
14a5cf38
JH
3542 while (p < b->ptr) {
3543 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3544 if (count > 0) {
3545 p += count;
3546 }
3547 else if (count < 0 || PerlIO_error(n)) {
3548 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3549 code = -1;
3550 break;
3551 }
3552 }
3553 b->posn += (p - buf);
3554 }
3555 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3556 STDCHAR *buf = PerlIO_get_base(f);
3557 /*
71200d45 3558 * Note position change
14a5cf38
JH
3559 */
3560 b->posn += (b->ptr - buf);
3561 if (b->ptr < b->end) {
4b069b44
NIS
3562 /* We did not consume all of it - try and seek downstream to
3563 our logical position
14a5cf38 3564 */
4b069b44 3565 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
04892f78
NIS
3566 /* Reload n as some layers may pop themselves on seek */
3567 b->posn = PerlIO_tell(n = PerlIONext(f));
14a5cf38 3568 }
ba5c3fe9 3569 else {
4b069b44
NIS
3570 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3571 data is lost for good - so return saying "ok" having undone
3572 the position adjust
3573 */
3574 b->posn -= (b->ptr - buf);
ba5c3fe9
NIS
3575 return code;
3576 }
14a5cf38
JH
3577 }
3578 }
3579 b->ptr = b->end = b->buf;
3580 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
04892f78 3581 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
04892f78 3582 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
14a5cf38
JH
3583 code = -1;
3584 return code;
6f9d8c32
NIS
3585}
3586
06da4f11 3587IV
f62ce20a 3588PerlIOBuf_fill(pTHX_ PerlIO *f)
06da4f11 3589{
14a5cf38
JH
3590 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3591 PerlIO *n = PerlIONext(f);
3592 SSize_t avail;
3593 /*
4b069b44
NIS
3594 * Down-stream flush is defined not to loose read data so is harmless.
3595 * we would not normally be fill'ing if there was data left in anycase.
14a5cf38
JH
3596 */
3597 if (PerlIO_flush(f) != 0)
3598 return -1;
3599 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
f62ce20a 3600 PerlIOBase_flush_linebuf(aTHX);
14a5cf38
JH
3601
3602 if (!b->buf)
22569500 3603 PerlIO_get_base(f); /* allocate via vtable */
14a5cf38
JH
3604
3605 b->ptr = b->end = b->buf;
4b069b44
NIS
3606
3607 if (!PerlIOValid(n)) {
3608 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3609 return -1;
3610 }
3611
14a5cf38
JH
3612 if (PerlIO_fast_gets(n)) {
3613 /*
04892f78 3614 * Layer below is also buffered. We do _NOT_ want to call its
14a5cf38
JH
3615 * ->Read() because that will loop till it gets what we asked for
3616 * which may hang on a pipe etc. Instead take anything it has to
71200d45 3617 * hand, or ask it to fill _once_.
14a5cf38
JH
3618 */
3619 avail = PerlIO_get_cnt(n);
3620 if (avail <= 0) {
3621 avail = PerlIO_fill(n);
3622 if (avail == 0)
3623 avail = PerlIO_get_cnt(n);
3624 else {
3625 if (!PerlIO_error(n) && PerlIO_eof(n))
3626 avail = 0;
3627 }
3628 }
3629 if (avail > 0) {
3630 STDCHAR *ptr = PerlIO_get_ptr(n);
3631 SSize_t cnt = avail;
eb160463 3632 if (avail > (SSize_t)b->bufsiz)
14a5cf38
JH
3633 avail = b->bufsiz;
3634 Copy(ptr, b->buf, avail, STDCHAR);
3635 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3636 }
3637 }
3638 else {
3639 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3640 }
3641 if (avail <= 0) {
3642 if (avail == 0)
3643 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3644 else
3645 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3646 return -1;
3647 }
3648 b->end = b->buf + avail;