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Re: [perl #41010] (?(COND)) in pattern matching not working properly
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
acde74e1 2 * perlio.c Copyright (c) 1996-2006, 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
b0f06652
VK
33# ifndef USE_CROSS_COMPILE
34# include "config.h"
35# else
36# include "xconfig.h"
37# endif
12ae5dfc 38#endif
760ac839 39
6f9d8c32 40#define PERLIO_NOT_STDIO 0
760ac839 41#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 42/*
71200d45 43 * #define PerlIO FILE
14a5cf38 44 */
760ac839
LW
45#endif
46/*
6f9d8c32 47 * This file provides those parts of PerlIO abstraction
88b61e10 48 * which are not #defined in perlio.h.
6f9d8c32 49 * Which these are depends on various Configure #ifdef's
760ac839
LW
50 */
51
52#include "EXTERN.h"
864dbfa3 53#define PERL_IN_PERLIO_C
760ac839
LW
54#include "perl.h"
55
32af7c23
CL
56#ifdef PERL_IMPLICIT_CONTEXT
57#undef dSYS
58#define dSYS dTHX
59#endif
60
0c4f7ff0
NIS
61#include "XSUB.h"
62
9cffb111
OS
63#ifdef __Lynx__
64/* Missing proto on LynxOS */
65int mkstemp(char*);
66#endif
67
1b7a0411 68/* Call the callback or PerlIOBase, and return failure. */
b32dd47e 69#define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
1b7a0411 70 if (PerlIOValid(f)) { \
46c461b5 71 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
72 if (tab && tab->callback) \
73 return (*tab->callback) args; \
74 else \
75 return PerlIOBase_ ## base args; \
76 } \
77 else \
78 SETERRNO(EBADF, SS_IVCHAN); \
79 return failure
80
81/* Call the callback or fail, and return failure. */
b32dd47e 82#define Perl_PerlIO_or_fail(f, callback, failure, args) \
1b7a0411 83 if (PerlIOValid(f)) { \
46c461b5 84 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
85 if (tab && tab->callback) \
86 return (*tab->callback) args; \
87 SETERRNO(EINVAL, LIB_INVARG); \
88 } \
89 else \
90 SETERRNO(EBADF, SS_IVCHAN); \
91 return failure
92
93/* Call the callback or PerlIOBase, and be void. */
b32dd47e 94#define Perl_PerlIO_or_Base_void(f, callback, base, args) \
1b7a0411 95 if (PerlIOValid(f)) { \
46c461b5 96 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
97 if (tab && tab->callback) \
98 (*tab->callback) args; \
99 else \
100 PerlIOBase_ ## base args; \
1b7a0411
JH
101 } \
102 else \
103 SETERRNO(EBADF, SS_IVCHAN)
104
105/* Call the callback or fail, and be void. */
b32dd47e 106#define Perl_PerlIO_or_fail_void(f, callback, args) \
1b7a0411 107 if (PerlIOValid(f)) { \
46c461b5 108 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
109 if (tab && tab->callback) \
110 (*tab->callback) args; \
37725cdc
NIS
111 else \
112 SETERRNO(EINVAL, LIB_INVARG); \
1b7a0411
JH
113 } \
114 else \
115 SETERRNO(EBADF, SS_IVCHAN)
116
89a3a251
JH
117#if defined(__osf__) && _XOPEN_SOURCE < 500
118extern int fseeko(FILE *, off_t, int);
119extern off_t ftello(FILE *);
120#endif
121
71ab4674 122#ifndef USE_SFIO
a0c21aa1
JH
123
124EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
125
71ab4674
SP
126int
127perlsio_binmode(FILE *fp, int iotype, int mode)
128{
129 /*
130 * This used to be contents of do_binmode in doio.c
131 */
132#ifdef DOSISH
133# if defined(atarist) || defined(__MINT__)
134 if (!fflush(fp)) {
135 if (mode & O_BINARY)
136 ((FILE *) fp)->_flag |= _IOBIN;
137 else
138 ((FILE *) fp)->_flag &= ~_IOBIN;
139 return 1;
140 }
141 return 0;
142# else
143 dTHX;
144#ifdef NETWARE
145 if (PerlLIO_setmode(fp, mode) != -1) {
146#else
147 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
148#endif
149# if defined(WIN32) && defined(__BORLANDC__)
150 /*
151 * The translation mode of the stream is maintained independent
152of
153 * the translation mode of the fd in the Borland RTL (heavy
154 * digging through their runtime sources reveal). User has to
155set
156 * the mode explicitly for the stream (though they don't
157document
158 * this anywhere). GSAR 97-5-24
159 */
160 fseek(fp, 0L, 0);
161 if (mode & O_BINARY)
162 fp->flags |= _F_BIN;
163 else
164 fp->flags &= ~_F_BIN;
165# endif
166 return 1;
167 }
168 else
169 return 0;
170# endif
171#else
172# if defined(USEMYBINMODE)
173 dTHX;
174 if (my_binmode(fp, iotype, mode) != FALSE)
175 return 1;
176 else
177 return 0;
178# else
179 PERL_UNUSED_ARG(fp);
180 PERL_UNUSED_ARG(iotype);
181 PERL_UNUSED_ARG(mode);
182 return 1;
183# endif
184#endif
185}
186#endif /* sfio */
187
06c7082d 188#ifndef O_ACCMODE
22569500 189#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS
190#endif
191
192int
193PerlIO_intmode2str(int rawmode, char *mode, int *writing)
194{
de009b76 195 const int result = rawmode & O_ACCMODE;
06c7082d
NIS
196 int ix = 0;
197 int ptype;
198 switch (result) {
199 case O_RDONLY:
200 ptype = IoTYPE_RDONLY;
201 break;
202 case O_WRONLY:
203 ptype = IoTYPE_WRONLY;
204 break;
205 case O_RDWR:
206 default:
207 ptype = IoTYPE_RDWR;
208 break;
209 }
210 if (writing)
211 *writing = (result != O_RDONLY);
212
213 if (result == O_RDONLY) {
214 mode[ix++] = 'r';
215 }
216#ifdef O_APPEND
217 else if (rawmode & O_APPEND) {
218 mode[ix++] = 'a';
219 if (result != O_WRONLY)
220 mode[ix++] = '+';
221 }
222#endif
223 else {
224 if (result == O_WRONLY)
225 mode[ix++] = 'w';
226 else {
227 mode[ix++] = 'r';
228 mode[ix++] = '+';
229 }
230 }
231 if (rawmode & O_BINARY)
232 mode[ix++] = 'b';
233 mode[ix] = '\0';
234 return ptype;
235}
236
eb73beca
NIS
237#ifndef PERLIO_LAYERS
238int
239PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
240{
6874a2de
NIS
241 if (!names || !*names
242 || strEQ(names, ":crlf")
243 || strEQ(names, ":raw")
244 || strEQ(names, ":bytes")
245 ) {
14a5cf38
JH
246 return 0;
247 }
248 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
249 /*
71200d45 250 * NOTREACHED
14a5cf38
JH
251 */
252 return -1;
eb73beca
NIS
253}
254
13621cfb
NIS
255void
256PerlIO_destruct(pTHX)
257{
258}
259
f5b9d040
NIS
260int
261PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
262{
92bff44d 263#ifdef USE_SFIO
8772537c
AL
264 PERL_UNUSED_ARG(iotype);
265 PERL_UNUSED_ARG(mode);
266 PERL_UNUSED_ARG(names);
14a5cf38 267 return 1;
92bff44d 268#else
14a5cf38 269 return perlsio_binmode(fp, iotype, mode);
92bff44d 270#endif
f5b9d040 271}
60382766 272
e0fa5af2 273PerlIO *
ecdeb87c 274PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 275{
a0fd4948 276#if defined(PERL_MICRO) || defined(__SYMBIAN32__)
0553478e
NIS
277 return NULL;
278#else
279#ifdef PERL_IMPLICIT_SYS
22569500 280 return PerlSIO_fdupopen(f);
0553478e 281#else
30753f56
NIS
282#ifdef WIN32
283 return win32_fdupopen(f);
284#else
e0fa5af2 285 if (f) {
504618e9 286 const int fd = PerlLIO_dup(PerlIO_fileno(f));
e0fa5af2 287 if (fd >= 0) {
06c7082d 288 char mode[8];
a5936e02 289#ifdef DJGPP
dcda55fc
AL
290 const int omode = djgpp_get_stream_mode(f);
291#else
292 const int omode = fcntl(fd, F_GETFL);
a5936e02 293#endif
06c7082d 294 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 295 /* the r+ is a hack */
06c7082d 296 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS
297 }
298 return NULL;
299 }
300 else {
93189314 301 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 302 }
7114a2d2 303#endif
e0fa5af2 304 return NULL;
0553478e 305#endif
30753f56 306#endif
e0fa5af2
NIS
307}
308
309
14a5cf38 310/*
71200d45 311 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 312 */
ee518936
NIS
313
314PerlIO *
14a5cf38
JH
315PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
316 int imode, int perm, PerlIO *old, int narg, SV **args)
317{
7cf31beb
NIS
318 if (narg) {
319 if (narg > 1) {
3b8752bb 320 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 321 }
14a5cf38
JH
322 if (*args == &PL_sv_undef)
323 return PerlIO_tmpfile();
324 else {
e62f0680 325 const char *name = SvPV_nolen_const(*args);
3b6c1aba 326 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
327 fd = PerlLIO_open3(name, imode, perm);
328 if (fd >= 0)
de009b76 329 return PerlIO_fdopen(fd, mode + 1);
14a5cf38
JH
330 }
331 else if (old) {
332 return PerlIO_reopen(name, mode, old);
333 }
334 else {
335 return PerlIO_open(name, mode);
336 }
337 }
338 }
339 else {
340 return PerlIO_fdopen(fd, (char *) mode);
341 }
342 return NULL;
ee518936
NIS
343}
344
0c4f7ff0
NIS
345XS(XS_PerlIO__Layer__find)
346{
14a5cf38
JH
347 dXSARGS;
348 if (items < 2)
349 Perl_croak(aTHX_ "Usage class->find(name[,load])");
350 else {
dcda55fc 351 const char * const name = SvPV_nolen_const(ST(1));
14a5cf38
JH
352 ST(0) = (strEQ(name, "crlf")
353 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
354 XSRETURN(1);
355 }
0c4f7ff0
NIS
356}
357
358
359void
360Perl_boot_core_PerlIO(pTHX)
361{
14a5cf38 362 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS
363}
364
ac27b0f5
NIS
365#endif
366
32e30700 367
6f9d8c32 368#ifdef PERLIO_IS_STDIO
760ac839
LW
369
370void
e8632036 371PerlIO_init(pTHX)
760ac839 372{
96a5add6 373 PERL_UNUSED_CONTEXT;
14a5cf38
JH
374 /*
375 * Does nothing (yet) except force this file to be included in perl
71200d45 376 * binary. That allows this file to force inclusion of other functions
14a5cf38 377 * that may be required by loadable extensions e.g. for
71200d45 378 * FileHandle::tmpfile
14a5cf38 379 */
760ac839
LW
380}
381
33dcbb9a
PP
382#undef PerlIO_tmpfile
383PerlIO *
8ac85365 384PerlIO_tmpfile(void)
33dcbb9a 385{
14a5cf38 386 return tmpfile();
33dcbb9a
PP
387}
388
22569500 389#else /* PERLIO_IS_STDIO */
760ac839
LW
390
391#ifdef USE_SFIO
392
393#undef HAS_FSETPOS
394#undef HAS_FGETPOS
395
14a5cf38
JH
396/*
397 * This section is just to make sure these functions get pulled in from
71200d45 398 * libsfio.a
14a5cf38 399 */
760ac839
LW
400
401#undef PerlIO_tmpfile
402PerlIO *
c78749f2 403PerlIO_tmpfile(void)
760ac839 404{
14a5cf38 405 return sftmp(0);
760ac839
LW
406}
407
408void
e8632036 409PerlIO_init(pTHX)
760ac839 410{
96a5add6 411 PERL_UNUSED_CONTEXT;
14a5cf38
JH
412 /*
413 * Force this file to be included in perl binary. Which allows this
414 * file to force inclusion of other functions that may be required by
71200d45 415 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 416 */
760ac839 417
14a5cf38 418 /*
71200d45 419 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 420 * results in a lot of lseek()s to regular files and lot of small
71200d45 421 * writes to pipes.
14a5cf38
JH
422 */
423 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW
424}
425
b9d6bf13 426/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 427PerlIO *
4b069b44 428PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 429{
de009b76 430 const int fd = fileno(stdio);
4b069b44 431 if (!mode || !*mode) {
81428673 432 mode = "r+";
4b069b44
NIS
433 }
434 return PerlIO_fdopen(fd, mode);
92bff44d
NIS
435}
436
437FILE *
438PerlIO_findFILE(PerlIO *pio)
439{
de009b76
AL
440 const int fd = PerlIO_fileno(pio);
441 FILE * const f = fdopen(fd, "r+");
14a5cf38
JH
442 PerlIO_flush(pio);
443 if (!f && errno == EINVAL)
444 f = fdopen(fd, "w");
445 if (!f && errno == EINVAL)
446 f = fdopen(fd, "r");
447 return f;
92bff44d
NIS
448}
449
450
22569500 451#else /* USE_SFIO */
6f9d8c32 452/*======================================================================================*/
14a5cf38 453/*
71200d45 454 * Implement all the PerlIO interface ourselves.
9e353e3b 455 */
760ac839 456
76ced9ad
NIS
457#include "perliol.h"
458
14a5cf38
JH
459/*
460 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 461 * files
14a5cf38 462 */
02f66e2f
NIS
463#ifdef I_UNISTD
464#include <unistd.h>
465#endif
06da4f11
NIS
466#ifdef HAS_MMAP
467#include <sys/mman.h>
468#endif
469
6f9d8c32 470void
14a5cf38
JH
471PerlIO_debug(const char *fmt, ...)
472{
14a5cf38
JH
473 va_list ap;
474 dSYS;
475 va_start(ap, fmt);
582588d2
NC
476 if (!PL_perlio_debug_fd) {
477 if (!PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
478 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
479 if (s && *s)
480 PL_perlio_debug_fd
481 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
482 else
483 PL_perlio_debug_fd = -1;
484 } else {
485 /* tainting or set*id, so ignore the environment, and ensure we
486 skip these tests next time through. */
27da23d5 487 PL_perlio_debug_fd = -1;
582588d2 488 }
14a5cf38 489 }
27da23d5 490 if (PL_perlio_debug_fd > 0) {
14a5cf38 491 dTHX;
70ace5da 492#ifdef USE_ITHREADS
dcda55fc 493 const char * const s = CopFILE(PL_curcop);
70ace5da
NIS
494 /* Use fixed buffer as sv_catpvf etc. needs SVs */
495 char buffer[1024];
1208b3dd
JH
496 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
497 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
498 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
70ace5da 499#else
dcda55fc
AL
500 const char *s = CopFILE(PL_curcop);
501 STRLEN len;
396482e1 502 SV * const sv = newSVpvs("");
dcda55fc 503 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
14a5cf38
JH
504 (IV) CopLINE(PL_curcop));
505 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
506
b83604b4 507 s = SvPV_const(sv, len);
27da23d5 508 PerlLIO_write(PL_perlio_debug_fd, s, len);
14a5cf38 509 SvREFCNT_dec(sv);
70ace5da 510#endif
14a5cf38
JH
511 }
512 va_end(ap);
6f9d8c32
NIS
513}
514
9e353e3b
NIS
515/*--------------------------------------------------------------------------------------*/
516
14a5cf38 517/*
71200d45 518 * Inner level routines
14a5cf38 519 */
9e353e3b 520
14a5cf38 521/*
71200d45 522 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 523 */
05d1247b 524#define PERLIO_TABLE_SIZE 64
6f9d8c32 525
760ac839 526PerlIO *
5f1a76d0 527PerlIO_allocate(pTHX)
6f9d8c32 528{
97aff369 529 dVAR;
14a5cf38 530 /*
71200d45 531 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH
532 */
533 PerlIO **last;
534 PerlIO *f;
a1ea730d 535 last = &PL_perlio;
14a5cf38
JH
536 while ((f = *last)) {
537 int i;
538 last = (PerlIO **) (f);
539 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
540 if (!*++f) {
541 return f;
542 }
543 }
544 }
a02a5408 545 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH
546 if (!f) {
547 return NULL;
548 }
549 *last = f;
550 return f + 1;
05d1247b
NIS
551}
552
a1ea730d
NIS
553#undef PerlIO_fdupopen
554PerlIO *
ecdeb87c 555PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 556{
04892f78 557 if (PerlIOValid(f)) {
de009b76 558 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
fe5a182c 559 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
210e727c
JH
560 if (tab && tab->Dup)
561 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
37725cdc
NIS
562 else {
563 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
564 }
a1ea730d 565 }
210e727c
JH
566 else
567 SETERRNO(EBADF, SS_IVCHAN);
568
569 return NULL;
a1ea730d
NIS
570}
571
572void
5f1a76d0 573PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 574{
dcda55fc 575 PerlIO * const table = *tablep;
14a5cf38
JH
576 if (table) {
577 int i;
578 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
579 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
dcda55fc 580 PerlIO * const f = table + i;
14a5cf38
JH
581 if (*f) {
582 PerlIO_close(f);
583 }
584 }
3a1ee7e8 585 Safefree(table);
14a5cf38 586 *tablep = NULL;
05d1247b 587 }
05d1247b
NIS
588}
589
fcf2db38
NIS
590
591PerlIO_list_t *
3a1ee7e8 592PerlIO_list_alloc(pTHX)
fcf2db38 593{
14a5cf38 594 PerlIO_list_t *list;
96a5add6 595 PERL_UNUSED_CONTEXT;
a02a5408 596 Newxz(list, 1, PerlIO_list_t);
14a5cf38
JH
597 list->refcnt = 1;
598 return list;
fcf2db38
NIS
599}
600
601void
3a1ee7e8 602PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 603{
14a5cf38
JH
604 if (list) {
605 if (--list->refcnt == 0) {
606 if (list->array) {
14a5cf38
JH
607 IV i;
608 for (i = 0; i < list->cur; i++) {
609 if (list->array[i].arg)
610 SvREFCNT_dec(list->array[i].arg);
611 }
612 Safefree(list->array);
613 }
614 Safefree(list);
615 }
616 }
fcf2db38
NIS
617}
618
619void
3a1ee7e8 620PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 621{
97aff369 622 dVAR;
334e202e 623 PerlIO_pair_t *p;
b37c2d43
AL
624 PERL_UNUSED_CONTEXT;
625
14a5cf38
JH
626 if (list->cur >= list->len) {
627 list->len += 8;
628 if (list->array)
629 Renew(list->array, list->len, PerlIO_pair_t);
630 else
a02a5408 631 Newx(list->array, list->len, PerlIO_pair_t);
14a5cf38
JH
632 }
633 p = &(list->array[list->cur++]);
634 p->funcs = funcs;
635 if ((p->arg = arg)) {
f84c484e 636 SvREFCNT_inc_simple_void_NN(arg);
14a5cf38 637 }
fcf2db38
NIS
638}
639
3a1ee7e8
NIS
640PerlIO_list_t *
641PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
642{
b37c2d43 643 PerlIO_list_t *list = NULL;
694c95cf
JH
644 if (proto) {
645 int i;
646 list = PerlIO_list_alloc(aTHX);
647 for (i=0; i < proto->cur; i++) {
a0714e2c 648 SV *arg = NULL;
694c95cf
JH
649 if (proto->array[i].arg)
650 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
651 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
652 }
3a1ee7e8
NIS
653 }
654 return list;
655}
4a4a6116 656
05d1247b 657void
3a1ee7e8 658PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 659{
3aaf42a7 660#ifdef USE_ITHREADS
3a1ee7e8
NIS
661 PerlIO **table = &proto->Iperlio;
662 PerlIO *f;
663 PL_perlio = NULL;
664 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
665 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
666 PerlIO_allocate(aTHX); /* root slot is never used */
a25429c6 667 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
3a1ee7e8
NIS
668 while ((f = *table)) {
669 int i;
670 table = (PerlIO **) (f++);
671 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
672 if (*f) {
93a8090d 673 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
674 }
675 f++;
676 }
677 }
1b6737cc 678#else
a25429c6 679 PERL_UNUSED_CONTEXT;
1b6737cc
AL
680 PERL_UNUSED_ARG(proto);
681 PERL_UNUSED_ARG(param);
3aaf42a7 682#endif
9a6404c5
DM
683}
684
685void
13621cfb
NIS
686PerlIO_destruct(pTHX)
687{
97aff369 688 dVAR;
a1ea730d 689 PerlIO **table = &PL_perlio;
14a5cf38 690 PerlIO *f;
694c95cf 691#ifdef USE_ITHREADS
a25429c6 692 PerlIO_debug("Destruct %p\n",(void*)aTHX);
694c95cf 693#endif
14a5cf38
JH
694 while ((f = *table)) {
695 int i;
696 table = (PerlIO **) (f++);
697 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
698 PerlIO *x = f;
dcda55fc 699 const PerlIOl *l;
14a5cf38
JH
700 while ((l = *x)) {
701 if (l->tab->kind & PERLIO_K_DESTRUCT) {
702 PerlIO_debug("Destruct popping %s\n", l->tab->name);
703 PerlIO_flush(x);
704 PerlIO_pop(aTHX_ x);
705 }
706 else {
707 x = PerlIONext(x);
708 }
709 }
710 f++;
711 }
712 }
13621cfb
NIS
713}
714
715void
a999f61b 716PerlIO_pop(pTHX_ PerlIO *f)
760ac839 717{
dcda55fc 718 const PerlIOl *l = *f;
14a5cf38 719 if (l) {
fe5a182c 720 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
721 if (l->tab->Popped) {
722 /*
723 * If popped returns non-zero do not free its layer structure
724 * it has either done so itself, or it is shared and still in
71200d45 725 * use
14a5cf38 726 */
f62ce20a 727 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
728 return;
729 }
b47cad08 730 *f = l->next;
3a1ee7e8 731 Safefree(l);
a8c08ecd 732 }
6f9d8c32
NIS
733}
734
39f7a870
JH
735/* Return as an array the stack of layers on a filehandle. Note that
736 * the stack is returned top-first in the array, and there are three
737 * times as many array elements as there are layers in the stack: the
738 * first element of a layer triplet is the name, the second one is the
739 * arguments, and the third one is the flags. */
740
741AV *
742PerlIO_get_layers(pTHX_ PerlIO *f)
743{
97aff369 744 dVAR;
dcda55fc 745 AV * const av = newAV();
39f7a870 746
dcda55fc
AL
747 if (PerlIOValid(f)) {
748 PerlIOl *l = PerlIOBase(f);
749
750 while (l) {
751 SV * const name = l->tab && l->tab->name ?
752 newSVpv(l->tab->name, 0) : &PL_sv_undef;
753 SV * const arg = l->tab && l->tab->Getarg ?
754 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
755 av_push(av, name);
756 av_push(av, arg);
757 av_push(av, newSViv((IV)l->flags));
758 l = l->next;
759 }
760 }
39f7a870 761
dcda55fc 762 return av;
39f7a870
JH
763}
764
9e353e3b 765/*--------------------------------------------------------------------------------------*/
14a5cf38 766/*
71200d45 767 * XS Interface for perl code
14a5cf38 768 */
9e353e3b 769
fcf2db38 770PerlIO_funcs *
2edd7e44 771PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 772{
27da23d5 773 dVAR;
14a5cf38
JH
774 IV i;
775 if ((SSize_t) len <= 0)
776 len = strlen(name);
3a1ee7e8 777 for (i = 0; i < PL_known_layers->cur; i++) {
46c461b5 778 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
a9f76400 779 if (memEQ(f->name, name, len) && f->name[len] == 0) {
fe5a182c 780 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
781 return f;
782 }
783 }
3a1ee7e8
NIS
784 if (load && PL_subname && PL_def_layerlist
785 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
786 if (PL_in_load_module) {
787 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
788 return NULL;
789 } else {
396482e1 790 SV * const pkgsv = newSVpvs("PerlIO");
46c461b5
AL
791 SV * const layer = newSVpvn(name, len);
792 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
793 ENTER;
d7a09b41 794 SAVEINT(PL_in_load_module);
c9bca74a 795 if (cv) {
9cfa90c0 796 SAVEGENERICSV(PL_warnhook);
b37c2d43 797 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
c9bca74a 798 }
d7a09b41
SR
799 PL_in_load_module++;
800 /*
801 * The two SVs are magically freed by load_module
802 */
a0714e2c 803 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
d7a09b41
SR
804 PL_in_load_module--;
805 LEAVE;
806 return PerlIO_find_layer(aTHX_ name, len, 0);
807 }
14a5cf38
JH
808 }
809 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
810 return NULL;
f3862f8b
NIS
811}
812
2a1bc955 813#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
814
815static int
816perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
817{
14a5cf38 818 if (SvROK(sv)) {
dcda55fc
AL
819 IO * const io = GvIOn((GV *) SvRV(sv));
820 PerlIO * const ifp = IoIFP(io);
821 PerlIO * const ofp = IoOFP(io);
14a5cf38
JH
822 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
823 }
824 return 0;
b13b2135
NIS
825}
826
827static int
828perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
829{
14a5cf38 830 if (SvROK(sv)) {
dcda55fc
AL
831 IO * const io = GvIOn((GV *) SvRV(sv));
832 PerlIO * const ifp = IoIFP(io);
833 PerlIO * const ofp = IoOFP(io);
14a5cf38
JH
834 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
835 }
836 return 0;
b13b2135
NIS
837}
838
839static int
840perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
841{
14a5cf38
JH
842 Perl_warn(aTHX_ "clear %" SVf, sv);
843 return 0;
b13b2135
NIS
844}
845
846static int
847perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
848{
14a5cf38
JH
849 Perl_warn(aTHX_ "free %" SVf, sv);
850 return 0;
b13b2135
NIS
851}
852
853MGVTBL perlio_vtab = {
14a5cf38
JH
854 perlio_mg_get,
855 perlio_mg_set,
22569500 856 NULL, /* len */
14a5cf38
JH
857 perlio_mg_clear,
858 perlio_mg_free
b13b2135
NIS
859};
860
861XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
862{
14a5cf38 863 dXSARGS;
dcda55fc
AL
864 SV * const sv = SvRV(ST(1));
865 AV * const av = newAV();
14a5cf38
JH
866 MAGIC *mg;
867 int count = 0;
868 int i;
869 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
870 SvRMAGICAL_off(sv);
871 mg = mg_find(sv, PERL_MAGIC_ext);
872 mg->mg_virtual = &perlio_vtab;
873 mg_magical(sv);
874 Perl_warn(aTHX_ "attrib %" SVf, sv);
875 for (i = 2; i < items; i++) {
876 STRLEN len;
dcda55fc
AL
877 const char * const name = SvPV_const(ST(i), len);
878 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
14a5cf38 879 if (layer) {
b37c2d43 880 av_push(av, SvREFCNT_inc_simple_NN(layer));
14a5cf38
JH
881 }
882 else {
883 ST(count) = ST(i);
884 count++;
885 }
886 }
887 SvREFCNT_dec(av);
888 XSRETURN(count);
889}
890
22569500 891#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 892
e3f3bf95
NIS
893SV *
894PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 895{
89529cee 896 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
46c461b5 897 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
14a5cf38 898 return sv;
e3f3bf95
NIS
899}
900
5ca1d77f 901XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 902{
37725cdc 903 /* This is used as a %SIG{__WARN__} handler to supress warnings
c9bca74a
NIS
904 during loading of layers.
905 */
97aff369 906 dVAR;
c9bca74a
NIS
907 dXSARGS;
908 if (items)
e62f0680 909 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
c9bca74a
NIS
910 XSRETURN(0);
911}
912
5ca1d77f 913XS(XS_PerlIO__Layer__find)
0c4f7ff0 914{
97aff369 915 dVAR;
14a5cf38
JH
916 dXSARGS;
917 if (items < 2)
918 Perl_croak(aTHX_ "Usage class->find(name[,load])");
919 else {
de009b76 920 STRLEN len;
46c461b5 921 const char * const name = SvPV_const(ST(1), len);
de009b76 922 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
46c461b5 923 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
14a5cf38
JH
924 ST(0) =
925 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
926 &PL_sv_undef;
927 XSRETURN(1);
928 }
0c4f7ff0
NIS
929}
930
e3f3bf95
NIS
931void
932PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
933{
97aff369 934 dVAR;
3a1ee7e8
NIS
935 if (!PL_known_layers)
936 PL_known_layers = PerlIO_list_alloc(aTHX);
a0714e2c 937 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
fe5a182c 938 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
939}
940
1141d9f8 941int
fcf2db38 942PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 943{
97aff369 944 dVAR;
14a5cf38
JH
945 if (names) {
946 const char *s = names;
947 while (*s) {
948 while (isSPACE(*s) || *s == ':')
949 s++;
950 if (*s) {
951 STRLEN llen = 0;
952 const char *e = s;
bd61b366 953 const char *as = NULL;
14a5cf38
JH
954 STRLEN alen = 0;
955 if (!isIDFIRST(*s)) {
956 /*
957 * Message is consistent with how attribute lists are
958 * passed. Even though this means "foo : : bar" is
71200d45 959 * seen as an invalid separator character.
14a5cf38 960 */
de009b76 961 const char q = ((*s == '\'') ? '"' : '\'');
99ef548b 962 if (ckWARN(WARN_LAYER))
22569500 963 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 964 "Invalid separator character %c%c%c in PerlIO layer specification %s",
1e616cf5 965 q, *s, q, s);
93189314 966 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
967 return -1;
968 }
969 do {
970 e++;
971 } while (isALNUM(*e));
972 llen = e - s;
973 if (*e == '(') {
974 int nesting = 1;
975 as = ++e;
976 while (nesting) {
977 switch (*e++) {
978 case ')':
979 if (--nesting == 0)
980 alen = (e - 1) - as;
981 break;
982 case '(':
983 ++nesting;
984 break;
985 case '\\':
986 /*
987 * It's a nul terminated string, not allowed
988 * to \ the terminating null. Anything other
71200d45 989 * character is passed over.
14a5cf38
JH
990 */
991 if (*e++) {
992 break;
993 }
994 /*
71200d45 995 * Drop through
14a5cf38
JH
996 */
997 case '\0':
998 e--;
22569500
NIS
999 if (ckWARN(WARN_LAYER))
1000 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 1001 "Argument list not closed for PerlIO layer \"%.*s\"",
14a5cf38
JH
1002 (int) (e - s), s);
1003 return -1;
1004 default:
1005 /*
71200d45 1006 * boring.
14a5cf38
JH
1007 */
1008 break;
1009 }
1010 }
1011 }
1012 if (e > s) {
46c461b5 1013 PerlIO_funcs * const layer =
14a5cf38
JH
1014 PerlIO_find_layer(aTHX_ s, llen, 1);
1015 if (layer) {
3a1ee7e8 1016 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH
1017 (as) ? newSVpvn(as,
1018 alen) :
1019 &PL_sv_undef);
1020 }
1021 else {
041457d9 1022 if (ckWARN(WARN_LAYER))
b4581f09 1023 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
14a5cf38
JH
1024 (int) llen, s);
1025 return -1;
1026 }
1027 }
1028 s = e;
1029 }
1030 }
1031 }
1032 return 0;
1141d9f8
NIS
1033}
1034
dfebf958 1035void
fcf2db38 1036PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 1037{
97aff369 1038 dVAR;
27da23d5 1039 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 1040#ifdef PERLIO_USING_CRLF
6ce75a77 1041 tab = &PerlIO_crlf;
846be114 1042#else
6ce75a77 1043 if (PerlIO_stdio.Set_ptrcnt)
22569500 1044 tab = &PerlIO_stdio;
846be114 1045#endif
14a5cf38 1046 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 1047 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 1048 &PL_sv_undef);
dfebf958
NIS
1049}
1050
e3f3bf95 1051SV *
14a5cf38 1052PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 1053{
14a5cf38 1054 return av->array[n].arg;
e3f3bf95
NIS
1055}
1056
f3862f8b 1057PerlIO_funcs *
14a5cf38 1058PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1059{
14a5cf38
JH
1060 if (n >= 0 && n < av->cur) {
1061 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1062 av->array[n].funcs->name);
1063 return av->array[n].funcs;
1064 }
1065 if (!def)
1066 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1067 return def;
e3f3bf95
NIS
1068}
1069
4ec2216f
NIS
1070IV
1071PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1072{
8772537c
AL
1073 PERL_UNUSED_ARG(mode);
1074 PERL_UNUSED_ARG(arg);
1075 PERL_UNUSED_ARG(tab);
4ec2216f
NIS
1076 if (PerlIOValid(f)) {
1077 PerlIO_flush(f);
1078 PerlIO_pop(aTHX_ f);
1079 return 0;
1080 }
1081 return -1;
1082}
1083
27da23d5 1084PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS
1085 sizeof(PerlIO_funcs),
1086 "pop",
1087 0,
1088 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1089 PerlIOPop_pushed,
1090 NULL,
1091 NULL,
1092 NULL,
1093 NULL,
1094 NULL,
1095 NULL,
1096 NULL,
1097 NULL,
1098 NULL,
1099 NULL,
de009b76
AL
1100 NULL,
1101 NULL,
4ec2216f
NIS
1102 NULL, /* flush */
1103 NULL, /* fill */
1104 NULL,
1105 NULL,
1106 NULL,
1107 NULL,
1108 NULL, /* get_base */
1109 NULL, /* get_bufsiz */
1110 NULL, /* get_ptr */
1111 NULL, /* get_cnt */
1112 NULL, /* set_ptrcnt */
1113};
1114
fcf2db38 1115PerlIO_list_t *
e3f3bf95
NIS
1116PerlIO_default_layers(pTHX)
1117{
97aff369 1118 dVAR;
3a1ee7e8 1119 if (!PL_def_layerlist) {
bd61b366 1120 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
27da23d5 1121 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1122 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1124#if defined(WIN32)
27da23d5 1125 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1126#if 0
14a5cf38 1127 osLayer = &PerlIO_win32;
0c4128ad 1128#endif
2f8118af 1129#endif
27da23d5
JH
1130 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1131 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1132 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1133 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
06da4f11 1134#ifdef HAS_MMAP
27da23d5 1135 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
06da4f11 1136#endif
27da23d5
JH
1137 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1138 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1139 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
3a1ee7e8 1140 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1141 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1142 &PL_sv_undef);
1143 if (s) {
3a1ee7e8 1144 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1145 }
1146 else {
3a1ee7e8 1147 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1148 }
1141d9f8 1149 }
3a1ee7e8
NIS
1150 if (PL_def_layerlist->cur < 2) {
1151 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1152 }
3a1ee7e8 1153 return PL_def_layerlist;
e3f3bf95
NIS
1154}
1155
0c4f7ff0
NIS
1156void
1157Perl_boot_core_PerlIO(pTHX)
1158{
1159#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1160 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1161 __FILE__);
0c4f7ff0 1162#endif
14a5cf38 1163 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1164 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1165}
e3f3bf95
NIS
1166
1167PerlIO_funcs *
1168PerlIO_default_layer(pTHX_ I32 n)
1169{
97aff369 1170 dVAR;
46c461b5 1171 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
14a5cf38
JH
1172 if (n < 0)
1173 n += av->cur;
27da23d5 1174 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS
1175}
1176
a999f61b
NIS
1177#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1178#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1179
1180void
1141d9f8 1181PerlIO_stdstreams(pTHX)
60382766 1182{
97aff369 1183 dVAR;
a1ea730d 1184 if (!PL_perlio) {
14a5cf38
JH
1185 PerlIO_allocate(aTHX);
1186 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1187 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1188 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1189 }
60382766
NIS
1190}
1191
1192PerlIO *
27da23d5 1193PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1194{
2dc2558e
NIS
1195 if (tab->fsize != sizeof(PerlIO_funcs)) {
1196 mismatch:
1197 Perl_croak(aTHX_ "Layer does not match this perl");
1198 }
1199 if (tab->size) {
b464bac0 1200 PerlIOl *l;
2dc2558e
NIS
1201 if (tab->size < sizeof(PerlIOl)) {
1202 goto mismatch;
1203 }
1204 /* Real layer with a data area */
002e75cf
JH
1205 if (f) {
1206 char *temp;
1207 Newxz(temp, tab->size, char);
1208 l = (PerlIOl*)temp;
1209 if (l) {
1210 l->next = *f;
1211 l->tab = (PerlIO_funcs*) tab;
1212 *f = l;
1213 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1214 (void*)f, tab->name,
1215 (mode) ? mode : "(Null)", (void*)arg);
1216 if (*l->tab->Pushed &&
1217 (*l->tab->Pushed)
1218 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1219 PerlIO_pop(aTHX_ f);
1220 return NULL;
1221 }
2dc2558e 1222 }
002e75cf
JH
1223 else
1224 return NULL;
2dc2558e
NIS
1225 }
1226 }
1227 else if (f) {
1228 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1229 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1230 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1231 if (tab->Pushed &&
27da23d5 1232 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1233 return NULL;
14a5cf38
JH
1234 }
1235 }
1236 return f;
60382766
NIS
1237}
1238
dfebf958 1239IV
86e05cf2
NIS
1240PerlIOBase_binmode(pTHX_ PerlIO *f)
1241{
1242 if (PerlIOValid(f)) {
1243 /* Is layer suitable for raw stream ? */
1244 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1245 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1246 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1247 }
1248 else {
1249 /* Not suitable - pop it */
1250 PerlIO_pop(aTHX_ f);
1251 }
1252 return 0;
1253 }
1254 return -1;
1255}
1256
1257IV
2dc2558e 1258PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1259{
8772537c
AL
1260 PERL_UNUSED_ARG(mode);
1261 PERL_UNUSED_ARG(arg);
1262 PERL_UNUSED_ARG(tab);
86e05cf2 1263
04892f78 1264 if (PerlIOValid(f)) {
86e05cf2 1265 PerlIO *t;
de009b76 1266 const PerlIOl *l;
14a5cf38 1267 PerlIO_flush(f);
86e05cf2
NIS
1268 /*
1269 * Strip all layers that are not suitable for a raw stream
1270 */
1271 t = f;
1272 while (t && (l = *t)) {
1273 if (l->tab->Binmode) {
1274 /* Has a handler - normal case */
1275 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1276 if (*t == l) {
1277 /* Layer still there - move down a layer */
1278 t = PerlIONext(t);
1279 }
1280 }
1281 else {
1282 return -1;
1283 }
14a5cf38
JH
1284 }
1285 else {
86e05cf2
NIS
1286 /* No handler - pop it */
1287 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1288 }
1289 }
86e05cf2
NIS
1290 if (PerlIOValid(f)) {
1291 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1292 return 0;
1293 }
14a5cf38
JH
1294 }
1295 return -1;
dfebf958
NIS
1296}
1297
ac27b0f5 1298int
14a5cf38 1299PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1300 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1301{
14a5cf38
JH
1302 int code = 0;
1303 while (n < max) {
8772537c 1304 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
14a5cf38
JH
1305 if (tab) {
1306 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1307 code = -1;
1308 break;
1309 }
1310 }
1311 n++;
1312 }
1313 return code;
e3f3bf95
NIS
1314}
1315
1316int
ac27b0f5
NIS
1317PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1318{
14a5cf38 1319 int code = 0;
53f1b6d2 1320 if (f && names) {
8772537c 1321 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1322 code = PerlIO_parse_layers(aTHX_ layers, names);
1323 if (code == 0) {
d9dac8cd 1324 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1325 }
3a1ee7e8 1326 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1327 }
14a5cf38 1328 return code;
ac27b0f5
NIS
1329}
1330
f3862f8b 1331
60382766 1332/*--------------------------------------------------------------------------------------*/
14a5cf38 1333/*
71200d45 1334 * Given the abstraction above the public API functions
14a5cf38 1335 */
60382766
NIS
1336
1337int
f5b9d040 1338PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1339{
68b5363f
PD
1340 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1341 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1342 iotype, mode, (names) ? names : "(Null)");
1343
03c0554d
NIS
1344 if (names) {
1345 /* Do not flush etc. if (e.g.) switching encodings.
1346 if a pushed layer knows it needs to flush lower layers
1347 (for example :unix which is never going to call them)
1348 it can do the flush when it is pushed.
1349 */
1350 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1351 }
1352 else {
86e05cf2 1353 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1354#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1355 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1356 O_BINARY so we can look for it in mode.
1357 */
1358 if (!(mode & O_BINARY)) {
1359 /* Text mode */
86e05cf2
NIS
1360 /* FIXME?: Looking down the layer stack seems wrong,
1361 but is a way of reaching past (say) an encoding layer
1362 to flip CRLF-ness of the layer(s) below
1363 */
03c0554d
NIS
1364 while (*f) {
1365 /* Perhaps we should turn on bottom-most aware layer
1366 e.g. Ilya's idea that UNIX TTY could serve
1367 */
1368 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1369 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1370 /* Not in text mode - flush any pending stuff and flip it */
1371 PerlIO_flush(f);
1372 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1373 }
1374 /* Only need to turn it on in one layer so we are done */
1375 return TRUE;
ed53a2bb 1376 }
03c0554d 1377 f = PerlIONext(f);
14a5cf38 1378 }
03c0554d
NIS
1379 /* Not finding a CRLF aware layer presumably means we are binary
1380 which is not what was requested - so we failed
1381 We _could_ push :crlf layer but so could caller
1382 */
1383 return FALSE;
14a5cf38 1384 }
6ce75a77 1385#endif
86e05cf2
NIS
1386 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1387 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1388 */
a0714e2c 1389 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
14a5cf38 1390 }
f5b9d040
NIS
1391}
1392
f5b9d040 1393int
e87a358a 1394PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1395{
37725cdc 1396 if (PerlIOValid(f)) {
46c461b5 1397 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
37725cdc
NIS
1398 if (tab && tab->Close)
1399 return (*tab->Close)(aTHX_ f);
1400 else
1401 return PerlIOBase_close(aTHX_ f);
1402 }
14a5cf38 1403 else {
93189314 1404 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1405 return -1;
1406 }
76ced9ad
NIS
1407}
1408
b931b1d9 1409int
e87a358a 1410Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1411{
de009b76 1412 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS
1413 while (PerlIOValid(f)) {
1414 PerlIO_pop(aTHX_ f);
f6c77cf1 1415 }
14a5cf38 1416 return code;
b931b1d9
NIS
1417}
1418
b931b1d9 1419int
e87a358a 1420Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1421{
97aff369 1422 dVAR;
b32dd47e 1423 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS
1424}
1425
1141d9f8 1426
fcf2db38 1427static PerlIO_funcs *
2edd7e44
NIS
1428PerlIO_layer_from_ref(pTHX_ SV *sv)
1429{
97aff369 1430 dVAR;
14a5cf38 1431 /*
71200d45 1432 * For any scalar type load the handler which is bundled with perl
14a5cf38 1433 */
75208dda
RGS
1434 if (SvTYPE(sv) < SVt_PVAV) {
1435 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1436 /* This isn't supposed to happen, since PerlIO::scalar is core,
1437 * but could happen anyway in smaller installs or with PAR */
1438 if (!f && ckWARN(WARN_LAYER))
1439 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1440 return f;
1441 }
14a5cf38
JH
1442
1443 /*
71200d45 1444 * For other types allow if layer is known but don't try and load it
14a5cf38
JH
1445 */
1446 switch (SvTYPE(sv)) {
1447 case SVt_PVAV:
6a245ed1 1448 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
14a5cf38 1449 case SVt_PVHV:
6a245ed1 1450 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
14a5cf38 1451 case SVt_PVCV:
6a245ed1 1452 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
14a5cf38 1453 case SVt_PVGV:
6a245ed1 1454 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
42d0e0b7
AL
1455 default:
1456 return NULL;
14a5cf38 1457 }
2edd7e44
NIS
1458}
1459
fcf2db38 1460PerlIO_list_t *
14a5cf38
JH
1461PerlIO_resolve_layers(pTHX_ const char *layers,
1462 const char *mode, int narg, SV **args)
1463{
97aff369 1464 dVAR;
14a5cf38
JH
1465 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1466 int incdef = 1;
a1ea730d 1467 if (!PL_perlio)
14a5cf38
JH
1468 PerlIO_stdstreams(aTHX);
1469 if (narg) {
dcda55fc 1470 SV * const arg = *args;
14a5cf38 1471 /*
71200d45
NIS
1472 * If it is a reference but not an object see if we have a handler
1473 * for it
14a5cf38
JH
1474 */
1475 if (SvROK(arg) && !sv_isobject(arg)) {
46c461b5 1476 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
14a5cf38 1477 if (handler) {
3a1ee7e8
NIS
1478 def = PerlIO_list_alloc(aTHX);
1479 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1480 incdef = 0;
1481 }
1482 /*
e934609f 1483 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1484 * something sensible else we will just stringfy and open
71200d45 1485 * resulting string.
14a5cf38
JH
1486 */
1487 }
1488 }
9fe371da 1489 if (!layers || !*layers)
11bcd5da 1490 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH
1491 if (layers && *layers) {
1492 PerlIO_list_t *av;
1493 if (incdef) {
de009b76 1494 IV i;
3a1ee7e8 1495 av = PerlIO_list_alloc(aTHX);
14a5cf38 1496 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1497 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH
1498 def->array[i].arg);
1499 }
1500 }
1501 else {
1502 av = def;
1503 }
0cff2cf3
NIS
1504 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1505 return av;
1506 }
1507 else {
1508 PerlIO_list_free(aTHX_ av);
b37c2d43 1509 return NULL;
0cff2cf3 1510 }
14a5cf38
JH
1511 }
1512 else {
1513 if (incdef)
1514 def->refcnt++;
1515 return def;
1516 }
ee518936
NIS
1517}
1518
1519PerlIO *
14a5cf38
JH
1520PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1521 int imode, int perm, PerlIO *f, int narg, SV **args)
1522{
97aff369 1523 dVAR;
14a5cf38
JH
1524 if (!f && narg == 1 && *args == &PL_sv_undef) {
1525 if ((f = PerlIO_tmpfile())) {
9fe371da 1526 if (!layers || !*layers)
11bcd5da 1527 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH
1528 if (layers && *layers)
1529 PerlIO_apply_layers(aTHX_ f, mode, layers);
1530 }
1531 }
1532 else {
de009b76 1533 PerlIO_list_t *layera;
14a5cf38
JH
1534 IV n;
1535 PerlIO_funcs *tab = NULL;
04892f78 1536 if (PerlIOValid(f)) {
14a5cf38 1537 /*
71200d45
NIS
1538 * This is "reopen" - it is not tested as perl does not use it
1539 * yet
14a5cf38
JH
1540 */
1541 PerlIOl *l = *f;
3a1ee7e8 1542 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1543 while (l) {
46c461b5 1544 SV * const arg = (l->tab->Getarg)
04892f78
NIS
1545 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1546 : &PL_sv_undef;
3a1ee7e8 1547 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH
1548 l = *PerlIONext(&l);
1549 }
1550 }
1551 else {
1552 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS
1553 if (!layera) {
1554 return NULL;
1555 }
14a5cf38
JH
1556 }
1557 /*
71200d45 1558 * Start at "top" of layer stack
14a5cf38
JH
1559 */
1560 n = layera->cur - 1;
1561 while (n >= 0) {
46c461b5 1562 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
14a5cf38
JH
1563 if (t && t->Open) {
1564 tab = t;
1565 break;
1566 }
1567 n--;
1568 }
1569 if (tab) {
1570 /*
71200d45 1571 * Found that layer 'n' can do opens - call it
14a5cf38 1572 */
7cf31beb 1573 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1574 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1575 }
14a5cf38 1576 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
355d3743
PD
1577 tab->name, layers ? layers : "(Null)", mode, fd,
1578 imode, perm, (void*)f, narg, (void*)args);
210e727c
JH
1579 if (tab->Open)
1580 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1581 f, narg, args);
1582 else {
1583 SETERRNO(EINVAL, LIB_INVARG);
1584 f = NULL;
1585 }
14a5cf38
JH
1586 if (f) {
1587 if (n + 1 < layera->cur) {
1588 /*
1589 * More layers above the one that we used to open -
71200d45 1590 * apply them now
14a5cf38 1591 */
d9dac8cd
NIS
1592 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1593 /* If pushing layers fails close the file */
1594 PerlIO_close(f);
14a5cf38
JH
1595 f = NULL;
1596 }
1597 }
1598 }
1599 }
3a1ee7e8 1600 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH
1601 }
1602 return f;
ee518936 1603}
b931b1d9
NIS
1604
1605
9e353e3b 1606SSize_t
e87a358a 1607Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1608{
b32dd47e 1609 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1610}
1611
313ca112 1612SSize_t
e87a358a 1613Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1614{
b32dd47e 1615 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1616}
1617
9e353e3b 1618SSize_t
e87a358a 1619Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1620{
b32dd47e 1621 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1622}
1623
6f9d8c32 1624int
e87a358a 1625Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1626{
b32dd47e 1627 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW
1628}
1629
9e353e3b 1630Off_t
e87a358a 1631Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1632{
b32dd47e 1633 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW
1634}
1635
6f9d8c32 1636int
e87a358a 1637Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1638{
97aff369 1639 dVAR;
14a5cf38
JH
1640 if (f) {
1641 if (*f) {
de009b76 1642 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1643
1644 if (tab && tab->Flush)
f62ce20a 1645 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH
1646 else
1647 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH
1648 }
1649 else {
fe5a182c 1650 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1651 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1652 return -1;
1653 }
1654 }
1655 else {
1656 /*
1657 * Is it good API design to do flush-all on NULL, a potentially
1658 * errorneous input? Maybe some magical value (PerlIO*
1659 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1660 * things on fflush(NULL), but should we be bound by their design
71200d45 1661 * decisions? --jhi
14a5cf38 1662 */
a1ea730d 1663 PerlIO **table = &PL_perlio;
14a5cf38
JH
1664 int code = 0;
1665 while ((f = *table)) {
1666 int i;
1667 table = (PerlIO **) (f++);
1668 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1669 if (*f && PerlIO_flush(f) != 0)
1670 code = -1;
1671 f++;
1672 }
1673 }
1674 return code;
1675 }
760ac839
LW
1676}
1677
a9c883f6 1678void
f62ce20a 1679PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1680{
97aff369 1681 dVAR;
a1ea730d 1682 PerlIO **table = &PL_perlio;
14a5cf38
JH
1683 PerlIO *f;
1684 while ((f = *table)) {
1685 int i;
1686 table = (PerlIO **) (f++);
1687 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1688 if (*f
1689 && (PerlIOBase(f)->
1690 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1691 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1692 PerlIO_flush(f);
1693 f++;
1694 }
a9c883f6 1695 }
a9c883f6
NIS
1696}
1697
06da4f11 1698int
e87a358a 1699Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1700{
b32dd47e 1701 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS
1702}
1703
f3862f8b
NIS
1704int
1705PerlIO_isutf8(PerlIO *f)
1706{
1b7a0411
JH
1707 if (PerlIOValid(f))
1708 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1709 else
1710 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1711
1b7a0411 1712 return -1;
f3862f8b
NIS
1713}
1714
6f9d8c32 1715int
e87a358a 1716Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1717{
b32dd47e 1718 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS
1719}
1720
9e353e3b 1721int
e87a358a 1722Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1723{
b32dd47e 1724 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS
1725}
1726
9e353e3b 1727void
e87a358a 1728Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1729{
b32dd47e 1730 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS
1731}
1732
9e353e3b 1733void
e87a358a 1734Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1735{
b32dd47e 1736 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS
1737}
1738
9e353e3b
NIS
1739int
1740PerlIO_has_base(PerlIO *f)
1741{
1b7a0411 1742 if (PerlIOValid(f)) {
46c461b5 1743 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1744
1745 if (tab)
1746 return (tab->Get_base != NULL);
1747 SETERRNO(EINVAL, LIB_INVARG);
1748 }
1749 else
1750 SETERRNO(EBADF, SS_IVCHAN);
1751
1752 return 0;
760ac839
LW
1753}
1754
9e353e3b
NIS
1755int
1756PerlIO_fast_gets(PerlIO *f)
760ac839 1757{
04892f78 1758 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
46c461b5 1759 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1760
1761 if (tab)
1762 return (tab->Set_ptrcnt != NULL);
1763 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1764 }
1b7a0411
JH
1765 else
1766 SETERRNO(EBADF, SS_IVCHAN);
1767
14a5cf38 1768 return 0;
9e353e3b
NIS
1769}
1770
9e353e3b
NIS
1771int
1772PerlIO_has_cntptr(PerlIO *f)
1773{
04892f78 1774 if (PerlIOValid(f)) {
46c461b5 1775 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1776
1777 if (tab)
1778 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1779 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1780 }
1b7a0411
JH
1781 else
1782 SETERRNO(EBADF, SS_IVCHAN);
1783
14a5cf38 1784 return 0;
9e353e3b
NIS
1785}
1786
9e353e3b
NIS
1787int
1788PerlIO_canset_cnt(PerlIO *f)
1789{
04892f78 1790 if (PerlIOValid(f)) {
46c461b5 1791 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1792
1793 if (tab)
1794 return (tab->Set_ptrcnt != NULL);
1795 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1796 }
1b7a0411
JH
1797 else
1798 SETERRNO(EBADF, SS_IVCHAN);
1799
14a5cf38 1800 return 0;
760ac839
LW
1801}
1802
888911fc 1803STDCHAR *
e87a358a 1804Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1805{
b32dd47e 1806 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS
1807}
1808
9e353e3b 1809int
e87a358a 1810Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1811{
b32dd47e 1812 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS
1813}
1814
9e353e3b 1815STDCHAR *
e87a358a 1816Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1817{
b32dd47e 1818 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS
1819}
1820
05d1247b 1821int
e87a358a 1822Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1823{
b32dd47e 1824 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS
1825}
1826
9e353e3b 1827void
e87a358a 1828Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1829{
b32dd47e 1830 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS
1831}
1832
9e353e3b 1833void
e87a358a 1834Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1835{
b32dd47e 1836 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS
1837}
1838
4ec2216f 1839
9e353e3b 1840/*--------------------------------------------------------------------------------------*/
14a5cf38 1841/*
71200d45 1842 * utf8 and raw dummy layers
14a5cf38 1843 */
dfebf958 1844
26fb694e 1845IV
2dc2558e 1846PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1847{
96a5add6 1848 PERL_UNUSED_CONTEXT;
8772537c
AL
1849 PERL_UNUSED_ARG(mode);
1850 PERL_UNUSED_ARG(arg);
00f51856 1851 if (PerlIOValid(f)) {
14a5cf38
JH
1852 if (tab->kind & PERLIO_K_UTF8)
1853 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1854 else
1855 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1856 return 0;
1857 }
1858 return -1;
26fb694e
NIS
1859}
1860
27da23d5 1861PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1862 sizeof(PerlIO_funcs),
14a5cf38 1863 "utf8",
2dc2558e 1864 0,
6874a2de 1865 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1866 PerlIOUtf8_pushed,
1867 NULL,
1868 NULL,
1869 NULL,
1870 NULL,
1871 NULL,
1872 NULL,
1873 NULL,
1874 NULL,
1875 NULL,
1876 NULL,
de009b76
AL
1877 NULL,
1878 NULL,
22569500
NIS
1879 NULL, /* flush */
1880 NULL, /* fill */
14a5cf38
JH
1881 NULL,
1882 NULL,
1883 NULL,
1884 NULL,
22569500
NIS
1885 NULL, /* get_base */
1886 NULL, /* get_bufsiz */
1887 NULL, /* get_ptr */
1888 NULL, /* get_cnt */
1889 NULL, /* set_ptrcnt */
26fb694e
NIS
1890};
1891
27da23d5 1892PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1893 sizeof(PerlIO_funcs),
14a5cf38 1894 "bytes",
2dc2558e 1895 0,
14a5cf38
JH
1896 PERLIO_K_DUMMY,
1897 PerlIOUtf8_pushed,
1898 NULL,
1899 NULL,
1900 NULL,
1901 NULL,
1902 NULL,
1903 NULL,
1904 NULL,
1905 NULL,
1906 NULL,
1907 NULL,
de009b76
AL
1908 NULL,
1909 NULL,
22569500
NIS
1910 NULL, /* flush */
1911 NULL, /* fill */
14a5cf38
JH
1912 NULL,
1913 NULL,
1914 NULL,
1915 NULL,
22569500
NIS
1916 NULL, /* get_base */
1917 NULL, /* get_bufsiz */
1918 NULL, /* get_ptr */
1919 NULL, /* get_cnt */
1920 NULL, /* set_ptrcnt */
dfebf958
NIS
1921};
1922
1923PerlIO *
14a5cf38
JH
1924PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1925 IV n, const char *mode, int fd, int imode, int perm,
1926 PerlIO *old, int narg, SV **args)
dfebf958 1927{
8772537c
AL
1928 PerlIO_funcs * const tab = PerlIO_default_btm();
1929 PERL_UNUSED_ARG(self);
210e727c
JH
1930 if (tab && tab->Open)
1931 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1932 old, narg, args);
1933 SETERRNO(EINVAL, LIB_INVARG);
1934 return NULL;
dfebf958
NIS
1935}
1936
27da23d5 1937PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1938 sizeof(PerlIO_funcs),
14a5cf38 1939 "raw",
2dc2558e 1940 0,
14a5cf38
JH
1941 PERLIO_K_DUMMY,
1942 PerlIORaw_pushed,
1943 PerlIOBase_popped,
1944 PerlIORaw_open,
1945 NULL,
1946 NULL,
1947 NULL,
1948 NULL,
1949 NULL,
1950 NULL,
1951 NULL,
1952 NULL,
de009b76
AL
1953 NULL,
1954 NULL,
22569500
NIS
1955 NULL, /* flush */
1956 NULL, /* fill */
14a5cf38
JH
1957 NULL,
1958 NULL,
1959 NULL,
1960 NULL,
22569500
NIS
1961 NULL, /* get_base */
1962 NULL, /* get_bufsiz */
1963 NULL, /* get_ptr */
1964 NULL, /* get_cnt */
1965 NULL, /* set_ptrcnt */
dfebf958
NIS
1966};
1967/*--------------------------------------------------------------------------------------*/
1968/*--------------------------------------------------------------------------------------*/
14a5cf38 1969/*
71200d45 1970 * "Methods" of the "base class"
14a5cf38 1971 */
9e353e3b
NIS
1972
1973IV
f62ce20a 1974PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1975{
04892f78 1976 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1977}
1978
f5b9d040 1979char *
81428673 1980PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1981{
1982 char *s = buf;
81428673 1983 if (PerlIOValid(f)) {
de009b76 1984 const IV flags = PerlIOBase(f)->flags;
81428673
NIS
1985 if (flags & PERLIO_F_APPEND) {
1986 *s++ = 'a';
1987 if (flags & PERLIO_F_CANREAD) {
1988 *s++ = '+';
1989 }
14a5cf38 1990 }
81428673
NIS
1991 else if (flags & PERLIO_F_CANREAD) {
1992 *s++ = 'r';
1993 if (flags & PERLIO_F_CANWRITE)
1994 *s++ = '+';
1995 }
1996 else if (flags & PERLIO_F_CANWRITE) {
1997 *s++ = 'w';
1998 if (flags & PERLIO_F_CANREAD) {
1999 *s++ = '+';
2000 }
14a5cf38 2001 }
35990314 2002#ifdef PERLIO_USING_CRLF
81428673
NIS
2003 if (!(flags & PERLIO_F_CRLF))
2004 *s++ = 'b';
5f1a76d0 2005#endif
81428673 2006 }
14a5cf38
JH
2007 *s = '\0';
2008 return buf;
f5b9d040
NIS
2009}
2010
81428673 2011
76ced9ad 2012IV
2dc2558e 2013PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 2014{
de009b76 2015 PerlIOl * const l = PerlIOBase(f);
96a5add6 2016 PERL_UNUSED_CONTEXT;
8772537c 2017 PERL_UNUSED_ARG(arg);
de009b76 2018
14a5cf38
JH
2019 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2020 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2021 if (tab->Set_ptrcnt != NULL)
2022 l->flags |= PERLIO_F_FASTGETS;
2023 if (mode) {
3b6c1aba 2024 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2025 mode++;
2026 switch (*mode++) {
2027 case 'r':
2028 l->flags |= PERLIO_F_CANREAD;
2029 break;
2030 case 'a':
2031 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2032 break;
2033 case 'w':
2034 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2035 break;
2036 default:
93189314 2037 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2038 return -1;
2039 }
2040 while (*mode) {
2041 switch (*mode++) {
2042 case '+':
2043 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2044 break;
2045 case 'b':
2046 l->flags &= ~PERLIO_F_CRLF;
2047 break;
2048 case 't':
2049 l->flags |= PERLIO_F_CRLF;
2050 break;
2051 default:
93189314 2052 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2053 return -1;
2054 }
2055 }
2056 }
2057 else {
2058 if (l->next) {
2059 l->flags |= l->next->flags &
2060 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2061 PERLIO_F_APPEND);
2062 }
2063 }
5e2ab84b 2064#if 0
14a5cf38
JH
2065 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2066 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2067 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 2068#endif
14a5cf38 2069 return 0;
76ced9ad
NIS
2070}
2071
2072IV
f62ce20a 2073PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2074{
96a5add6 2075 PERL_UNUSED_CONTEXT;
8772537c 2076 PERL_UNUSED_ARG(f);
14a5cf38 2077 return 0;
760ac839
LW
2078}
2079
9e353e3b 2080SSize_t
f62ce20a 2081PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2082{
14a5cf38 2083 /*
71200d45 2084 * Save the position as current head considers it
14a5cf38 2085 */
de009b76 2086 const Off_t old = PerlIO_tell(f);
a0714e2c 2087 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
14a5cf38 2088 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2089 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS
2090}
2091
f6c77cf1 2092SSize_t
f62ce20a 2093PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2094{
14a5cf38
JH
2095 STDCHAR *buf = (STDCHAR *) vbuf;
2096 if (f) {
263df5f1
JH
2097 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2098 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2099 SETERRNO(EBADF, SS_IVCHAN);
2100 return 0;
2101 }
14a5cf38 2102 while (count > 0) {
93c2c2ec
IZ
2103 get_cnt:
2104 {
14a5cf38
JH
2105 SSize_t avail = PerlIO_get_cnt(f);
2106 SSize_t take = 0;
2107 if (avail > 0)
bb7a0f54 2108 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
14a5cf38
JH
2109 if (take > 0) {
2110 STDCHAR *ptr = PerlIO_get_ptr(f);
2111 Copy(ptr, buf, take, STDCHAR);
2112 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2113 count -= take;
2114 buf += take;
93c2c2ec
IZ
2115 if (avail == 0) /* set_ptrcnt could have reset avail */
2116 goto get_cnt;
14a5cf38
JH
2117 }
2118 if (count > 0 && avail <= 0) {
2119 if (PerlIO_fill(f) != 0)
2120 break;
2121 }
93c2c2ec 2122 }
14a5cf38
JH
2123 }
2124 return (buf - (STDCHAR *) vbuf);
2125 }
f6c77cf1 2126 return 0;
f6c77cf1
NIS
2127}
2128
9e353e3b 2129IV
f62ce20a 2130PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2131{
96a5add6 2132 PERL_UNUSED_CONTEXT;
8772537c 2133 PERL_UNUSED_ARG(f);
14a5cf38 2134 return 0;
9e353e3b
NIS
2135}
2136
2137IV
f62ce20a 2138PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2139{
96a5add6 2140 PERL_UNUSED_CONTEXT;
8772537c 2141 PERL_UNUSED_ARG(f);
14a5cf38 2142 return -1;
06da4f11
NIS
2143}
2144
2145IV
f62ce20a 2146PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2147{
37725cdc
NIS
2148 IV code = -1;
2149 if (PerlIOValid(f)) {
2150 PerlIO *n = PerlIONext(f);
2151 code = PerlIO_flush(f);
2152 PerlIOBase(f)->flags &=
2153 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2154 while (PerlIOValid(n)) {
de009b76 2155 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS
2156 if (tab && tab->Close) {
2157 if ((*tab->Close)(aTHX_ n) != 0)
2158 code = -1;
2159 break;
2160 }
2161 else {
2162 PerlIOBase(n)->flags &=
2163 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2164 }
2165 n = PerlIONext(n);
2166 }
2167 }
2168 else {
2169 SETERRNO(EBADF, SS_IVCHAN);
2170 }
14a5cf38 2171 return code;
9e353e3b
NIS
2172}
2173
2174IV
f62ce20a 2175PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2176{
96a5add6 2177 PERL_UNUSED_CONTEXT;
04892f78 2178 if (PerlIOValid(f)) {
14a5cf38
JH
2179 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2180 }
2181 return 1;
9e353e3b
NIS
2182}
2183
2184IV
f62ce20a 2185PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2186{
96a5add6 2187 PERL_UNUSED_CONTEXT;
04892f78 2188 if (PerlIOValid(f)) {
14a5cf38
JH
2189 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2190 }
2191 return 1;
9e353e3b
NIS
2192}
2193
2194void
f62ce20a 2195PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2196{
04892f78 2197 if (PerlIOValid(f)) {
dcda55fc 2198 PerlIO * const n = PerlIONext(f);
14a5cf38 2199 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2200 if (PerlIOValid(n))
14a5cf38
JH
2201 PerlIO_clearerr(n);
2202 }
9e353e3b
NIS
2203}
2204
2205void
f62ce20a 2206PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2207{
96a5add6 2208 PERL_UNUSED_CONTEXT;
04892f78 2209 if (PerlIOValid(f)) {
14a5cf38
JH
2210 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2211 }
9e353e3b
NIS
2212}
2213
93a8090d
NIS
2214SV *
2215PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2216{
2217 if (!arg)
a0714e2c 2218 return NULL;
93a8090d
NIS
2219#ifdef sv_dup
2220 if (param) {
2221 return sv_dup(arg, param);
2222 }
2223 else {
2224 return newSVsv(arg);
2225 }
2226#else
1b6737cc 2227 PERL_UNUSED_ARG(param);
93a8090d
NIS
2228 return newSVsv(arg);
2229#endif
2230}
2231
2232PerlIO *
ecdeb87c 2233PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d 2234{
1b6737cc 2235 PerlIO * const nexto = PerlIONext(o);
04892f78 2236 if (PerlIOValid(nexto)) {
de009b76 2237 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS
2238 if (tab && tab->Dup)
2239 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2240 else
2241 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2242 }
2243 if (f) {
dcda55fc 2244 PerlIO_funcs * const self = PerlIOBase(o)->tab;
210e727c 2245 SV *arg;
93a8090d 2246 char buf[8];
fe5a182c
JH
2247 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2248 self->name, (void*)f, (void*)o, (void*)param);
210e727c
JH
2249 if (self->Getarg)
2250 arg = (*self->Getarg)(aTHX_ o, param, flags);
2251 else {
a0714e2c 2252 arg = NULL;
93a8090d
NIS
2253 }
2254 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2255 if (arg) {
93a8090d
NIS
2256 SvREFCNT_dec(arg);
2257 }
2258 }
2259 return f;
2260}
2261
27da23d5 2262/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d 2263
8b84d7dd 2264/* Must be called with PL_perlio_mutex locked. */
22c96fc1
NC
2265static void
2266S_more_refcounted_fds(pTHX_ const int new_fd) {
7a89be66 2267 dVAR;
22c96fc1 2268 const int old_max = PL_perlio_fd_refcnt_size;
f4ae5be6 2269 const int new_max = 16 + (new_fd & ~15);
22c96fc1
NC
2270 int *new_array;
2271
2272 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2273 old_max, new_fd, new_max);
2274
2275 if (new_fd < old_max) {
2276 return;
2277 }
2278
f4ae5be6
NC
2279 assert (new_max > new_fd);
2280
10edeb5d
JH
2281 new_array =
2282 (int*) PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
22c96fc1
NC
2283
2284 if (!new_array) {
8b84d7dd 2285#ifdef USE_ITHREADS
6cb8cb21 2286 MUTEX_UNLOCK(&PL_perlio_mutex);
22c96fc1
NC
2287#endif
2288 /* Can't use PerlIO to write as it allocates memory */
2289 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2290 PL_no_mem, strlen(PL_no_mem));
2291 my_exit(1);
2292 }
2293
2294 PL_perlio_fd_refcnt_size = new_max;
2295 PL_perlio_fd_refcnt = new_array;
2296
95b63a38
JH
2297 PerlIO_debug("Zeroing %p, %d\n",
2298 (void*)(new_array + old_max),
2299 new_max - old_max);
22c96fc1
NC
2300
2301 Zero(new_array + old_max, new_max - old_max, int);
2302}
2303
2304
93a8090d
NIS
2305void
2306PerlIO_init(pTHX)
2307{
8b84d7dd 2308 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
96a5add6 2309 PERL_UNUSED_CONTEXT;
93a8090d
NIS
2310}
2311
168d5872
NIS
2312void
2313PerlIOUnix_refcnt_inc(int fd)
2314{
27da23d5 2315 dTHX;
22c96fc1 2316 if (fd >= 0) {
97aff369 2317 dVAR;
22c96fc1 2318
8b84d7dd 2319#ifdef USE_ITHREADS
6cb8cb21 2320 MUTEX_LOCK(&PL_perlio_mutex);
168d5872 2321#endif
22c96fc1
NC
2322 if (fd >= PL_perlio_fd_refcnt_size)
2323 S_more_refcounted_fds(aTHX_ fd);
2324
27da23d5 2325 PL_perlio_fd_refcnt[fd]++;
8b84d7dd
RGS
2326 if (PL_perlio_fd_refcnt[fd] <= 0) {
2327 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2328 fd, PL_perlio_fd_refcnt[fd]);
2329 }
2330 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2331 fd, PL_perlio_fd_refcnt[fd]);
22c96fc1 2332
8b84d7dd 2333#ifdef USE_ITHREADS
6cb8cb21 2334 MUTEX_UNLOCK(&PL_perlio_mutex);
168d5872 2335#endif
8b84d7dd
RGS
2336 } else {
2337 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
168d5872
NIS
2338 }
2339}
2340
168d5872
NIS
2341int
2342PerlIOUnix_refcnt_dec(int fd)
2343{
27da23d5 2344 dTHX;
168d5872 2345 int cnt = 0;
22c96fc1 2346 if (fd >= 0) {
97aff369 2347 dVAR;
8b84d7dd 2348#ifdef USE_ITHREADS
6cb8cb21 2349 MUTEX_LOCK(&PL_perlio_mutex);
168d5872 2350#endif
8b84d7dd
RGS
2351 if (fd >= PL_perlio_fd_refcnt_size) {
2352 Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
2353 fd, PL_perlio_fd_refcnt_size);
2354 }
2355 if (PL_perlio_fd_refcnt[fd] <= 0) {
2356 Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
2357 fd, PL_perlio_fd_refcnt[fd]);
2358 }
27da23d5 2359 cnt = --PL_perlio_fd_refcnt[fd];
8b84d7dd
RGS
2360 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2361#ifdef USE_ITHREADS
6cb8cb21 2362 MUTEX_UNLOCK(&PL_perlio_mutex);
168d5872 2363#endif
8b84d7dd
RGS
2364 } else {
2365 Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
168d5872
NIS
2366 }
2367 return cnt;
2368}
2369
694c95cf
JH
2370void
2371PerlIO_cleanup(pTHX)
2372{
97aff369 2373 dVAR;
694c95cf
JH
2374 int i;
2375#ifdef USE_ITHREADS
a25429c6 2376 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
9f4bd222
NIS
2377#else
2378 PerlIO_debug("Cleanup layers\n");
694c95cf 2379#endif
e47547a8 2380
694c95cf
JH
2381 /* Raise STDIN..STDERR refcount so we don't close them */
2382 for (i=0; i < 3; i++)
2383 PerlIOUnix_refcnt_inc(i);
2384 PerlIO_cleantable(aTHX_ &PL_perlio);
2385 /* Restore STDIN..STDERR refcount */
2386 for (i=0; i < 3; i++)
2387 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2388
2389 if (PL_known_layers) {
2390 PerlIO_list_free(aTHX_ PL_known_layers);
2391 PL_known_layers = NULL;
2392 }
27da23d5 2393 if (PL_def_layerlist) {
9f4bd222
NIS
2394 PerlIO_list_free(aTHX_ PL_def_layerlist);
2395 PL_def_layerlist = NULL;
2396 }
6cb8cb21
RGS
2397}
2398
2399void PerlIO_teardown(pTHX) /* Call only from PERL_SYS_TERM(). */
2400{
2401#ifdef DEBUGGING
2402 {
2403 /* By now all filehandles should have been closed, so any
2404 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2405 * errors. */
2406 int i;
2407 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2408 if (PL_perlio_fd_refcnt[i])
2409 PerlIO_debug("PerlIO_cleanup: fd %d refcnt=%d\n",
2410 i, PL_perlio_fd_refcnt[i]);
2411 }
2412 }
2413#endif
8b84d7dd 2414#ifdef USE_ITHREADS
6cb8cb21 2415 MUTEX_LOCK(&PL_perlio_mutex);
1cd82952
RGS
2416#endif
2417 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2418 && PL_perlio_fd_refcnt) {
2419#ifdef PERL_TRACK_MEMPOOL
2420 Malloc_t ptr = (Malloc_t)((char*)PL_perlio_fd_refcnt-sTHX);
2421 struct perl_memory_debug_header *const header
2422 = (struct perl_memory_debug_header *)ptr;
2423 /* Only the thread that allocated us can free us. */
2424 if (header->interpreter == aTHX)
2425#endif
2426 {
6cb8cb21 2427 PerlMemShared_free(PL_perlio_fd_refcnt); /* Not Safefree() because was allocated with PerlMemShared_realloc(). */
1cd82952
RGS
2428 PL_perlio_fd_refcnt = NULL;
2429 PL_perlio_fd_refcnt_size = 0;
2430 }
2431 }
8b84d7dd 2432#ifdef USE_ITHREADS
6cb8cb21 2433 MUTEX_UNLOCK(&PL_perlio_mutex);
1cd82952 2434#endif
694c95cf
JH
2435}
2436
2437
2438
9e353e3b 2439/*--------------------------------------------------------------------------------------*/
14a5cf38 2440/*
71200d45 2441 * Bottom-most level for UNIX-like case
14a5cf38 2442 */
9e353e3b 2443
14a5cf38 2444typedef struct {
22569500
NIS
2445 struct _PerlIO base; /* The generic part */
2446 int fd; /* UNIX like file descriptor */
2447 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2448} PerlIOUnix;
2449
6f9d8c32 2450int
9e353e3b 2451PerlIOUnix_oflags(const char *mode)
760ac839 2452{
14a5cf38 2453 int oflags = -1;
3b6c1aba 2454 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH
2455 mode++;
2456 switch (*mode) {
2457 case 'r':
2458 oflags = O_RDONLY;
2459 if (*++mode == '+') {
2460 oflags = O_RDWR;
2461 mode++;
2462 }
2463 break;
2464
2465 case 'w':
2466 oflags = O_CREAT | O_TRUNC;
2467 if (*++mode == '+') {
2468 oflags |= O_RDWR;
2469 mode++;
2470 }
2471 else
2472 oflags |= O_WRONLY;
2473 break;
2474
2475 case 'a':
2476 oflags = O_CREAT | O_APPEND;
2477 if (*++mode == '+') {
2478 oflags |= O_RDWR;
2479 mode++;
2480 }
2481 else
2482 oflags |= O_WRONLY;
2483 break;
2484 }
2485 if (*mode == 'b') {
2486 oflags |= O_BINARY;
2487 oflags &= ~O_TEXT;
2488 mode++;
2489 }
2490 else if (*mode == 't') {
2491 oflags |= O_TEXT;
2492 oflags &= ~O_BINARY;
2493 mode++;
2494 }
2495 /*
71200d45 2496 * Always open in binary mode
14a5cf38
JH
2497 */
2498 oflags |= O_BINARY;
2499 if (*mode || oflags == -1) {
93189314 2500 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2501 oflags = -1;
2502 }
2503 return oflags;
9e353e3b
NIS
2504}
2505
2506IV
f62ce20a 2507PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2508{
96a5add6 2509 PERL_UNUSED_CONTEXT;
14a5cf38 2510 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2511}
2512
aa063c35
NIS
2513static void
2514PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2515{
de009b76 2516 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2517#if defined(WIN32)
aa063c35
NIS
2518 Stat_t st;
2519 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2520 if (!S_ISREG(st.st_mode)) {
aa063c35 2521 PerlIO_debug("%d is not regular file\n",fd);
6caa5a9c
NIS
2522 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2523 }
aa063c35
NIS
2524 else {
2525 PerlIO_debug("%d _is_ a regular file\n",fd);
2526 }
6caa5a9c
NIS
2527 }
2528#endif
aa063c35
NIS
2529 s->fd = fd;
2530 s->oflags = imode;
2531 PerlIOUnix_refcnt_inc(fd);
96a5add6 2532 PERL_UNUSED_CONTEXT;
aa063c35
NIS
2533}
2534
2535IV
2536PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2537{
2538 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2539 if (*PerlIONext(f)) {
4b069b44 2540 /* We never call down so do any pending stuff now */
03c0554d 2541 PerlIO_flush(PerlIONext(f));
14a5cf38 2542 /*
71200d45 2543 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2544 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2545 * Should the value on NULL mode be 0 or -1?
14a5cf38 2546 */
acbd16bf 2547 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2548 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH
2549 }
2550 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2551
14a5cf38 2552 return code;
4b803d04
NIS
2553}
2554
c2fcde81
JH
2555IV
2556PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2557{
de009b76 2558 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2559 Off_t new_loc;
96a5add6 2560 PERL_UNUSED_CONTEXT;
c2fcde81
JH
2561 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2562#ifdef ESPIPE
2563 SETERRNO(ESPIPE, LIB_INVARG);
2564#else
2565 SETERRNO(EINVAL, LIB_INVARG);
2566#endif
2567 return -1;
2568 }
0723351e
NC
2569 new_loc = PerlLIO_lseek(fd, offset, whence);
2570 if (new_loc == (Off_t) - 1)
dcda55fc 2571 return -1;
c2fcde81
JH
2572 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2573 return 0;
2574}
2575
9e353e3b 2576PerlIO *
14a5cf38
JH
2577PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2578 IV n, const char *mode, int fd, int imode,
2579 int perm, PerlIO *f, int narg, SV **args)
2580{
d9dac8cd 2581 if (PerlIOValid(f)) {
14a5cf38 2582 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2583 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2584 }
2585 if (narg > 0) {
3b6c1aba 2586 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH
2587 mode++;
2588 else {
2589 imode = PerlIOUnix_oflags(mode);
2590 perm = 0666;
2591 }
2592 if (imode != -1) {
e62f0680 2593 const char *path = SvPV_nolen_const(*args);
14a5cf38
JH
2594 fd = PerlLIO_open3(path, imode, perm);
2595 }
2596 }
2597 if (fd >= 0) {
3b6c1aba 2598 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2599 mode++;
2600 if (!f) {
2601 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2602 }
2603 if (!PerlIOValid(f)) {
a33cf58c
NIS
2604 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2605 return NULL;
2606 }
d9dac8cd 2607 }
aa063c35 2608 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2609 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH
2610 if (*mode == IoTYPE_APPEND)
2611 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH
2612 return f;
2613 }
2614 else {
2615 if (f) {
6f207bd3 2616 NOOP;
14a5cf38 2617 /*
71200d45 2618 * FIXME: pop layers ???
14a5cf38
JH
2619 */
2620 }
2621 return NULL;
2622 }
9e353e3b
NIS
2623}
2624
71200d45 2625PerlIO *
ecdeb87c 2626PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 2627{
dcda55fc 2628 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2629 int fd = os->fd;
ecdeb87c
NIS
2630 if (flags & PERLIO_DUP_FD) {
2631 fd = PerlLIO_dup(fd);
2632 }
22c96fc1 2633 if (fd >= 0) {
ecdeb87c 2634 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2635 if (f) {
2636 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2637 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS
2638 return f;
2639 }
71200d45
NIS
2640 }
2641 return NULL;
2642}
2643
2644
9e353e3b 2645SSize_t
f62ce20a 2646PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2647{
97aff369 2648 dVAR;
de009b76 2649 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2650#ifdef PERLIO_STD_SPECIAL
2651 if (fd == 0)
2652 return PERLIO_STD_IN(fd, vbuf, count);
2653#endif
81428673 2654 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2655 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2656 return 0;
1fd8f4ce 2657 }
14a5cf38 2658 while (1) {
b464bac0 2659 const SSize_t len = PerlLIO_read(fd, vbuf, count);
14a5cf38 2660 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2661 if (len < 0) {
2662 if (errno != EAGAIN) {
2663 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2664 }
2665 }
2666 else if (len == 0 && count != 0) {
14a5cf38 2667 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS
2668 SETERRNO(0,0);
2669 }
14a5cf38
JH
2670 return len;
2671 }
2672 PERL_ASYNC_CHECK();
2673 }
b464bac0 2674 /*NOTREACHED*/
9e353e3b
NIS
2675}
2676
2677SSize_t
f62ce20a 2678PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2679{
97aff369 2680 dVAR;
de009b76 2681 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2682#ifdef PERLIO_STD_SPECIAL
2683 if (fd == 1 || fd == 2)
2684 return PERLIO_STD_OUT(fd, vbuf, count);
2685#endif
14a5cf38 2686 while (1) {
de009b76 2687 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2688 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2689 if (len < 0) {
2690 if (errno != EAGAIN) {
2691 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2692 }
2693 }
14a5cf38
JH
2694 return len;
2695 }
2696 PERL_ASYNC_CHECK();
06da4f11 2697 }
1b6737cc 2698 /*NOTREACHED*/
9e353e3b
NIS
2699}
2700
9e353e3b 2701Off_t
f62ce20a 2702PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2703{
96a5add6
AL
2704 PERL_UNUSED_CONTEXT;
2705
14a5cf38 2706 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2707}
2708
71200d45 2709
9e353e3b 2710IV
f62ce20a 2711PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2712{
97aff369 2713 dVAR;
de009b76 2714 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2715 int code = 0;
168d5872
NIS
2716 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2717 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2718 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2719 return 0;
22569500 2720 }
93a8090d
NIS
2721 }
2722 else {
93189314 2723 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2724 return -1;
2725 }
14a5cf38
JH
2726 while (PerlLIO_close(fd) != 0) {
2727 if (errno != EINTR) {
2728 code = -1;
2729 break;
2730 }
2731 PERL_ASYNC_CHECK();
2732 }
2733 if (code == 0) {
2734 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2735 }
2736 return code;
9e353e3b
NIS
2737}
2738
27da23d5 2739PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2740 sizeof(PerlIO_funcs),
14a5cf38
JH
2741 "unix",
2742 sizeof(PerlIOUnix),
2743 PERLIO_K_RAW,
2744 PerlIOUnix_pushed,
44798d05 2745 PerlIOBase_popped,
14a5cf38 2746 PerlIOUnix_open,
86e05cf2 2747 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2748 NULL,
2749 PerlIOUnix_fileno,
71200d45 2750 PerlIOUnix_dup,
14a5cf38
JH
2751 PerlIOUnix_read,
2752 PerlIOBase_unread,
2753 PerlIOUnix_write,
2754 PerlIOUnix_seek,
2755 PerlIOUnix_tell,
2756 PerlIOUnix_close,
22569500
NIS
2757 PerlIOBase_noop_ok, /* flush */
2758 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2759 PerlIOBase_eof,
2760 PerlIOBase_error,
2761 PerlIOBase_clearerr,
2762 PerlIOBase_setlinebuf,
22569500
NIS
2763 NULL, /* get_base */
2764 NULL, /* get_bufsiz */
2765 NULL, /* get_ptr */
2766 NULL, /* get_cnt */
2767 NULL, /* set_ptrcnt */
9e353e3b
NIS
2768};
2769
2770/*--------------------------------------------------------------------------------------*/
14a5cf38 2771/*
71200d45 2772 * stdio as a layer
14a5cf38 2773 */
9e353e3b 2774
313e59c8
NIS
2775#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2776/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2777 broken by the last second glibc 2.3 fix
2778 */
2779#define STDIO_BUFFER_WRITABLE
2780#endif
2781
2782
14a5cf38
JH
2783typedef struct {
2784 struct _PerlIO base;
22569500 2785 FILE *stdio; /* The stream */
9e353e3b
NIS
2786} PerlIOStdio;
2787
2788IV
f62ce20a 2789PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2790{
96a5add6
AL
2791 PERL_UNUSED_CONTEXT;
2792
c4420975
AL
2793 if (PerlIOValid(f)) {
2794 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2795 if (s)
2796 return PerlSIO_fileno(s);
439ba545
NIS
2797 }
2798 errno = EBADF;
2799 return -1;
9e353e3b
NIS
2800}
2801
766a733e 2802char *
14a5cf38
JH
2803PerlIOStdio_mode(const char *mode, char *tmode)
2804{
de009b76 2805 char * const ret = tmode;
a0625d38
SR
2806 if (mode) {
2807 while (*mode) {
2808 *tmode++ = *mode++;
2809 }
14a5cf38 2810 }
95005ad8 2811#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH
2812 *tmode++ = 'b';
2813#endif
14a5cf38
JH
2814 *tmode = '\0';
2815 return ret;
2816}
2817
4b803d04 2818IV
2dc2558e 2819PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2820{
1fd8f4ce
NIS
2821 PerlIO *n;
2822 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
46c461b5 2823 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
1fd8f4ce
NIS
2824 if (toptab == tab) {
2825 /* Top is already stdio - pop self (duplicate) and use original */
2826 PerlIO_pop(aTHX_ f);
2827 return 0;
2828 } else {
de009b76 2829 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS
2830 char tmode[8];
2831 FILE *stdio;
81428673 2832 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2833 mode = PerlIOStdio_mode(mode, tmode)))) {
2834 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2835 /* We never call down so do any pending stuff now */
2836 PerlIO_flush(PerlIONext(f));
81428673 2837 }
1fd8f4ce
NIS
2838 else {
2839 return -1;
2840 }
2841 }
14a5cf38 2842 }
2dc2558e 2843 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2844}
2845
22569500 2846
9e353e3b 2847PerlIO *
4b069b44 2848PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2849{
14a5cf38
JH
2850 dTHX;
2851 PerlIO *f = NULL;
2852 if (stdio) {
22569500 2853 PerlIOStdio *s;
4b069b44
NIS
2854 if (!mode || !*mode) {
2855 /* We need to probe to see how we can open the stream
2856 so start with read/write and then try write and read
2857 we dup() so that we can fclose without loosing the fd.
2858
2859 Note that the errno value set by a failing fdopen
2860 varies between stdio implementations.
2861 */
de009b76 2862 const int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2863 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2864 if (!f2) {
a33cf58c 2865 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2866 }
2867 if (!f2) {
a33cf58c 2868 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2869 }
2870 if (!f2) {
2871 /* Don't seem to be able to open */
2872 PerlLIO_close(fd);
2873 return f;
2874 }
2875 fclose(f2);
22569500 2876 }
a0714e2c 2877 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
a33cf58c
NIS
2878 s = PerlIOSelf(f, PerlIOStdio);
2879 s->stdio = stdio;
2880 }
14a5cf38
JH
2881 }
2882 return f;
9e353e3b
NIS
2883}
2884
2885PerlIO *
14a5cf38
JH
2886PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2887 IV n, const char *mode, int fd, int imode,
2888 int perm, PerlIO *f, int narg, SV **args)
2889{
2890 char tmode[8];
d9dac8cd 2891 if (PerlIOValid(f)) {
dcda55fc
AL
2892 const char * const path = SvPV_nolen_const(*args);
2893 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2894 FILE *stdio;
2895 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2896 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2897 s->stdio);
2898 if (!s->stdio)
2899 return NULL;
2900 s->stdio = stdio;
1751d015 2901 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2902 return f;
2903 }
2904 else {
2905 if (narg > 0) {
dcda55fc 2906 const char * const path = SvPV_nolen_const(*args);
3b6c1aba 2907 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
2908 mode++;
2909 fd = PerlLIO_open3(path, imode, perm);
2910 }
2911 else {
95005ad8
GH
2912 FILE *stdio;
2913 bool appended = FALSE;
2914#ifdef __CYGWIN__
2915 /* Cygwin wants its 'b' early. */
2916 appended = TRUE;
2917 mode = PerlIOStdio_mode(mode, tmode);
2918#endif
2919 stdio = PerlSIO_fopen(path, mode);
6f0313ac 2920 if (stdio) {
6f0313ac
JH
2921 if (!f) {
2922 f = PerlIO_allocate(aTHX);
2923 }
95005ad8
GH
2924 if (!appended)
2925 mode = PerlIOStdio_mode(mode, tmode);
2926 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2927 if (f) {
0f0f9e2b
JH
2928 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2929 PerlIOUnix_refcnt_inc(fileno(stdio));
2930 } else {
2931 PerlSIO_fclose(stdio);
6f0313ac
JH
2932 }
2933 return f;
2934 }
2935 else {
2936 return NULL;
2937 }
14a5cf38
JH
2938 }
2939 }
2940 if (fd >= 0) {
2941 FILE *stdio = NULL;
2942 int init = 0;
3b6c1aba 2943 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
2944 init = 1;
2945 mode++;
2946 }
2947 if (init) {
2948 switch (fd) {
2949 case 0:
2950 stdio = PerlSIO_stdin;
2951 break;
2952 case 1:
2953 stdio = PerlSIO_stdout;
2954 break;
2955 case 2:
2956 stdio = PerlSIO_stderr;
2957 break;
2958 }
2959 }
2960 else {
2961 stdio = PerlSIO_fdopen(fd, mode =
2962 PerlIOStdio_mode(mode, tmode));
2963 }
2964 if (stdio) {
d9dac8cd
NIS
2965 if (!f) {
2966 f = PerlIO_allocate(aTHX);
2967 }
a33cf58c 2968 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
1a159fba
JH
2969 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2970 PerlIOUnix_refcnt_inc(fileno(stdio));
a33cf58c 2971 }
14a5cf38
JH
2972 return f;
2973 }
2974 }
2975 }
ee518936 2976 return NULL;
9e353e3b
NIS
2977}
2978
1751d015 2979PerlIO *
ecdeb87c 2980PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2981{
2982 /* This assumes no layers underneath - which is what
2983 happens, but is not how I remember it. NI-S 2001/10/16
2984 */
ecdeb87c 2985 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2986 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 2987 const int fd = fileno(stdio);
9217ff3f 2988 char mode[8];
ecdeb87c 2989 if (flags & PERLIO_DUP_FD) {
de009b76 2990 const int dfd = PerlLIO_dup(fileno(stdio));
9217ff3f
NIS
2991 if (dfd >= 0) {
2992 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2993 goto set_this;
ecdeb87c
NIS
2994 }
2995 else {
6f207bd3 2996 NOOP;
ecdeb87c
NIS
2997 /* FIXME: To avoid messy error recovery if dup fails
2998 re-use the existing stdio as though flag was not set
2999 */
3000 }
3001 }
9217ff3f
NIS
3002 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3003 set_this:
694c95cf
JH
3004 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3005 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
3006 }
3007 return f;
3008}
3009
0d7a5398
NIS
3010static int
3011PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3012{
96a5add6
AL
3013 PERL_UNUSED_CONTEXT;
3014
0d7a5398 3015 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 3016 * PerlIO_set_fileno() support from Configure
0d7a5398 3017 */
ef8eacb8
AT
3018# if defined(__UCLIBC__)
3019 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3020 f->__filedes = -1;
3021 return 1;
3022# elif defined(__GLIBC__)
0d7a5398 3023 /* There may be a better way for GLIBC:
37725cdc 3024 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS
3025 */
3026 f->_fileno = -1;
3027 return 1;
3028# elif defined(__sun__)
f5992bc4 3029 PERL_UNUSED_ARG(f);
cfedb851 3030 return 0;
0d7a5398
NIS
3031# elif defined(__hpux)
3032 f->__fileH = 0xff;
3033 f->__fileL = 0xff;
3034 return 1;
9837d373 3035 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 3036 your platform does not have special entry try this one.
9837d373
NIS
3037 [For OSF only have confirmation for Tru64 (alpha)
3038 but assume other OSFs will be similar.]
37725cdc 3039 */
9837d373 3040# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
3041 f->_file = -1;
3042 return 1;
3043# elif defined(__FreeBSD__)
3044 /* There may be a better way on FreeBSD:
37725cdc
NIS
3045 - we could insert a dummy func in the _close function entry
3046 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3047 */
3048 f->_file = -1;
0c49ea6a
SU
3049 return 1;
3050# elif defined(__OpenBSD__)
3051 /* There may be a better way on OpenBSD:
3052 - we could insert a dummy func in the _close function entry
3053 f->_close = (int (*)(void *)) dummy_close;
3054 */
3055 f->_file = -1;
0d7a5398 3056 return 1;
59ad941d
IZ
3057# elif defined(__EMX__)
3058 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3059 f->_handle = -1;
3060 return 1;
0d7a5398
NIS
3061# elif defined(__CYGWIN__)
3062 /* There may be a better way on CYGWIN:
37725cdc
NIS
3063 - we could insert a dummy func in the _close function entry
3064 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3065 */
3066 f->_file = -1;
3067 return 1;
3068# elif defined(WIN32)
3069# if defined(__BORLANDC__)
3070 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
3071# elif defined(UNDER_CE)
3072 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3073 structure at all
3074 */
0d7a5398
NIS
3075# else
3076 f->_file = -1;
3077# endif
3078 return 1;
3079# else
3080#if 0
37725cdc 3081 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 3082 (which isn't thread safe) instead
37725cdc 3083 */
0d7a5398
NIS
3084# error "Don't know how to set FILE.fileno on your platform"
3085#endif
8772537c 3086 PERL_UNUSED_ARG(f);
0d7a5398
NIS
3087 return 0;
3088# endif
3089}
3090
1751d015 3091IV
f62ce20a 3092PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 3093{
c4420975 3094 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
3095 if (!stdio) {
3096 errno = EBADF;
3097 return -1;
3098 }
9217ff3f 3099 else {
de009b76 3100 const int fd = fileno(stdio);
0d7a5398 3101 int invalidate = 0;
bbfd922f 3102 IV result = 0;
0d7a5398
NIS
3103 int saveerr = 0;
3104 int dupfd = 0;
3105#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS
3106 /* Socks lib overrides close() but stdio isn't linked to
3107 that library (though we are) - so we must call close()
3108 on sockets on stdio's behalf.
3109 */
0d7a5398
NIS
3110 int optval;
3111 Sock_size_t optlen = sizeof(int);
6b4ce6c8 3112 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
37725cdc 3113 invalidate = 1;
0d7a5398 3114#endif
6b4ce6c8 3115 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
0d7a5398 3116 invalidate = 1;
0d7a5398 3117 if (invalidate) {
6b4ce6c8
AL
3118 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3119 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3120 return 0;
3121 if (stdio == stdout || stdio == stderr)
3122 return PerlIO_flush(f);
37725cdc
NIS
3123 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3124 Use Sarathy's trick from maint-5.6 to invalidate the
3125 fileno slot of the FILE *
3126 */
bbfd922f 3127 result = PerlIO_flush(f);
0d7a5398 3128 saveerr = errno;
6b4ce6c8
AL
3129 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3130 if (!invalidate)
3131 dupfd = PerlLIO_dup(fd);
37725cdc 3132 }
0d7a5398 3133 result = PerlSIO_fclose(stdio);
37725cdc
NIS
3134 /* We treat error from stdio as success if we invalidated
3135 errno may NOT be expected EBADF
e8529473
NIS
3136 */
3137 if (invalidate && result != 0) {
0d7a5398
NIS
3138 errno = saveerr;
3139 result = 0;
37725cdc 3140 }
6b4ce6c8
AL
3141#ifdef SOCKS5_VERSION_NAME
3142 /* in SOCKS' case, let close() determine return value */
3143 result = close(fd);
3144#endif
0d7a5398
NIS
3145 if (dupfd) {
3146 PerlLIO_dup2(dupfd,fd);
8a521f28 3147 PerlLIO_close(dupfd);
9217ff3f
NIS
3148 }
3149 return result;
37725cdc 3150 }
1751d015
NIS
3151}
3152
9e353e3b 3153SSize_t
f62ce20a 3154PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3155{
97aff369 3156 dVAR;
c4420975 3157 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3158 SSize_t got = 0;
4d948241
NIS
3159 for (;;) {
3160 if (count == 1) {
3161 STDCHAR *buf = (STDCHAR *) vbuf;
3162 /*
3163 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3164 * stdio does not do that for fread()
3165 */
de009b76 3166 const int ch = PerlSIO_fgetc(s);
4d948241
NIS
3167 if (ch != EOF) {
3168 *buf = ch;
3169 got = 1;
3170 }
14a5cf38 3171 }
4d948241
NIS
3172 else
3173 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS
3174 if (got == 0 && PerlSIO_ferror(s))
3175 got = -1;
42a7a32f 3176 if (got >= 0 || errno != EINTR)
4d948241
NIS
3177 break;
3178 PERL_ASYNC_CHECK();
42a7a32f 3179 SETERRNO(0,0); /* just in case */
14a5cf38 3180 }
14a5cf38 3181 return got;
9e353e3b
NIS
3182}
3183
3184SSize_t
f62ce20a 3185PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3186{
14a5cf38 3187 SSize_t unread = 0;
c4420975 3188 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3189
313e59c8 3190#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3191 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3192 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3193 STDCHAR *base = PerlIO_get_base(f);
3194 SSize_t cnt = PerlIO_get_cnt(f);
3195 STDCHAR *ptr = PerlIO_get_ptr(f);
3196 SSize_t avail = ptr - base;
3197 if (avail > 0) {
3198 if (avail > count) {
3199 avail = count;
3200 }
3201 ptr -= avail;
3202 Move(buf-avail,ptr,avail,STDCHAR);
3203 count -= avail;
3204 unread += avail;
3205 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
3206 if (PerlSIO_feof(s) && unread >= 0)
3207 PerlSIO_clearerr(s);
3208 }
3209 }
313e59c8
NIS
3210 else
3211#endif
3212 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3213 /* We can get pointer to buffer but not its base
3214 Do ungetc() but check chars are ending up in the
3215 buffer
3216 */
3217 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3218 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3219 while (count > 0) {
de009b76 3220 const int ch = *--buf & 0xFF;
9f7cd136
NIS
3221 if (ungetc(ch,s) != ch) {
3222 /* ungetc did not work */
3223 break;
3224 }
3225 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3226 /* Did not change pointer as expected */
3227 fgetc(s); /* get char back again */
3228 break;
3229 }
3230 /* It worked ! */
3231 count--;
3232 unread++;
93679785
NIS
3233 }
3234 }
3235
3236 if (count > 0) {
3237 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
3238 }
3239 return unread;
9e353e3b
NIS
3240}
3241
3242SSize_t
f62ce20a 3243PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3244{
97aff369 3245 dVAR;
4d948241
NIS
3246 SSize_t got;
3247 for (;;) {
3248 got = PerlSIO_fwrite(vbuf, 1, count,
3249 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3250 if (got >= 0 || errno != EINTR)
4d948241
NIS
3251 break;
3252 PERL_ASYNC_CHECK();
42a7a32f 3253 SETERRNO(0,0); /* just in case */
4d948241
NIS
3254 }
3255 return got;
9e353e3b
NIS
3256}
3257
94a175e1 3258IV
f62ce20a 3259PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3260{
c4420975 3261 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3262 PERL_UNUSED_CONTEXT;
3263
94a175e1 3264 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
3265}
3266
3267Off_t
f62ce20a 3268PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3269{
c4420975 3270 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3271 PERL_UNUSED_CONTEXT;
3272
94a175e1 3273 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3274}
3275
3276IV
f62ce20a 3277PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3278{
c4420975 3279 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3280 PERL_UNUSED_CONTEXT;
3281
14a5cf38
JH
3282 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3283 return PerlSIO_fflush(stdio);
3284 }
3285 else {
6f207bd3 3286 NOOP;
88b61e10 3287#if 0
14a5cf38
JH
3288 /*
3289 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3290 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3291 * design is to do _this_ but not have layer above flush this
71200d45 3292 * layer read-to-read
14a5cf38
JH
3293 */
3294 /*
71200d45 3295 * Not writeable - sync by attempting a seek
14a5cf38 3296 */
79852593 3297 const int err = errno;
14a5cf38
JH
3298 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3299 errno = err;
88b61e10 3300#endif
14a5cf38
JH
3301 }
3302 return 0;
9e353e3b
NIS
3303}
3304
3305IV
f62ce20a 3306PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3307{
96a5add6
AL
3308 PERL_UNUSED_CONTEXT;
3309
14a5cf38 3310 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3311}
3312
3313IV
f62ce20a 3314PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3315{
96a5add6
AL
3316 PERL_UNUSED_CONTEXT;
3317
263df5f1 3318 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3319}
3320
3321void
f62ce20a 3322PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3323{
96a5add6
AL
3324 PERL_UNUSED_CONTEXT;
3325
14a5cf38 3326 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3327}
3328
3329void
f62ce20a 3330PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 3331{
96a5add6
AL
3332 PERL_UNUSED_CONTEXT;
3333
9e353e3b 3334#ifdef HAS_SETLINEBUF
14a5cf38 3335 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3336#else
bd61b366 3337 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
9e353e3b
NIS
3338#endif
3339}
3340
3341#ifdef FILE_base
3342STDCHAR *
f62ce20a 3343PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3344{
c4420975 3345 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3346 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3347}
3348
3349Size_t
f62ce20a 3350PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3351{
c4420975 3352 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3353 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3354}
3355#endif
3356
3357#ifdef USE_STDIO_PTR
3358STDCHAR *
f62ce20a 3359PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3360{
c4420975 3361 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3362 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3363}
3364
3365SSize_t
f62ce20a 3366PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3367{
c4420975 3368 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3369 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3370}
3371
3372void
f62ce20a 3373PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3374{
c4420975 3375 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3376 if (ptr != NULL) {
9e353e3b 3377#ifdef STDIO_PTR_LVALUE
d06fc7d4 3378 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3379#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3380 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3381 assert(PerlSIO_get_cnt(stdio) == (cnt));
3382 }
9e353e3b
NIS
3383#endif
3384#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3385 /*
71200d45 3386 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3387 */
3388 return;
9e353e3b 3389#endif
22569500 3390#else /* STDIO_PTR_LVALUE */
14a5cf38 3391 PerlProc_abort();
22569500 3392#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3393 }
3394 /*
71200d45 3395 * Now (or only) set cnt
14a5cf38 3396 */
9e353e3b 3397#ifdef STDIO_CNT_LVALUE
14a5cf38 3398 PerlSIO_set_cnt(stdio, cnt);
22569500 3399#else /* STDIO_CNT_LVALUE */
9e353e3b 3400#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3401 PerlSIO_set_ptr(stdio,
3402 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3403 cnt));
22569500 3404#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3405 PerlProc_abort();
22569500
NIS
3406#endif /* STDIO_PTR_LVAL_SETS_CNT */
3407#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3408}
3409
93679785 3410
9e353e3b
NIS
3411#endif
3412
93679785
NIS
3413IV
3414PerlIOStdio_fill(pTHX_ PerlIO *f)
3415{
c4420975 3416 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3417 int c;
96a5add6
AL
3418 PERL_UNUSED_CONTEXT;
3419
93679785
NIS
3420 /*
3421 * fflush()ing read-only streams can cause trouble on some stdio-s
3422 */
3423 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3424 if (PerlSIO_fflush(stdio) != 0)
3425 return EOF;
3426 }
3427 c = PerlSIO_fgetc(stdio);
3428 if (c == EOF)
3429 return EOF;
3430
3431#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3432
3433#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3434 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3435 /* Fake ungetc() to the real buffer in case system's ungetc
3436 goes elsewhere
3437 */
3438 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3439 SSize_t cnt = PerlSIO_get_cnt(stdio);
3440 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3441 if (ptr == base+1) {
3442 *--ptr = (STDCHAR) c;
3443 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3444 if (PerlSIO_feof(stdio))
3445 PerlSIO_clearerr(stdio);
3446 return 0;
3447 }
3448 }
313e59c8
NIS
3449 else
3450#endif
3451 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3452 STDCHAR ch = c;
3453 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3454 return 0;
3455 }
3456 }
93679785
NIS
3457#endif
3458
3459#if defined(VMS)
3460 /* An ungetc()d char is handled separately from the regular
3461 * buffer, so we stuff it in the buffer ourselves.
3462 * Should never get called as should hit code above
3463 */
bad9695d
NIS
3464 *(--((*stdio)->_ptr)) = (unsigned char) c;
3465 (*stdio)->_cnt++;
93679785
NIS
3466#else
3467 /* If buffer snoop scheme above fails fall back to
9f7cd136 3468 using ungetc().
93679785
NIS
3469 */
3470 if (PerlSIO_ungetc(c, stdio) != c)
3471 return EOF;
3472#endif
3473 return 0;
3474}
3475
3476
3477
27da23d5 3478PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3479 sizeof(PerlIO_funcs),
14a5cf38
JH
3480 "stdio",
3481 sizeof(PerlIOStdio),
86e05cf2 3482 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3483 PerlIOStdio_pushed,
44798d05 3484 PerlIOBase_popped,
14a5cf38 3485 PerlIOStdio_open,
86e05cf2 3486 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3487 NULL,
3488 PerlIOStdio_fileno,
71200d45 3489 PerlIOStdio_dup,
14a5cf38
JH
3490 PerlIOStdio_read,
3491 PerlIOStdio_unread,
3492 PerlIOStdio_write,
3493 PerlIOStdio_seek,
3494 PerlIOStdio_tell,
3495 PerlIOStdio_close,
3496 PerlIOStdio_flush,
3497 PerlIOStdio_fill,
3498 PerlIOStdio_eof,
3499 PerlIOStdio_error,
3500 PerlIOStdio_clearerr,
3501 PerlIOStdio_setlinebuf,
9e353e3b 3502#ifdef FILE_base
14a5cf38
JH
3503 PerlIOStdio_get_base,
3504 PerlIOStdio_get_bufsiz,
9e353e3b 3505#else
14a5cf38
JH
3506 NULL,
3507 NULL,
9e353e3b
NIS
3508#endif
3509#ifdef USE_STDIO_PTR
14a5cf38
JH
3510 PerlIOStdio_get_ptr,
3511 PerlIOStdio_get_cnt,
15b61c98 3512# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3513 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3514# else
3515 NULL,
3516# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3517#else
3518 NULL,
14a5cf38
JH
3519 NULL,
3520 NULL,
15b61c98 3521#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3522};
3523
b9d6bf13
JH
3524/* Note that calls to PerlIO_exportFILE() are reversed using
3525 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3526FILE *
81428673 3527PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3528{
e87a358a 3529 dTHX;
81428673
NIS
3530 FILE *stdio = NULL;
3531 if (PerlIOValid(f)) {
3532 char buf[8];
3533 PerlIO_flush(f);
3534 if (!mode || !*mode) {
3535 mode = PerlIO_modestr(f, buf);
3536 }
3537 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3538 if (stdio) {
3539 PerlIOl *l = *f;
9f75cc58 3540 PerlIO *f2;
81428673
NIS
3541 /* De-link any lower layers so new :stdio sticks */
3542 *f = NULL;
a0714e2c 3543 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
9f75cc58 3544 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673
NIS
3545 s->stdio = stdio;
3546 /* Link previous lower layers under new one */
3547 *PerlIONext(f) = l;
3548 }
3549 else {
3550 /* restore layers list */
3551 *f = l;
3552 }
a33cf58c 3553 }
14a5cf38
JH
3554 }
3555 return stdio;
9e353e3b
NIS
3556}
3557
81428673 3558
9e353e3b
NIS
3559FILE *
3560PerlIO_findFILE(PerlIO *f)
3561{
14a5cf38
JH
3562 PerlIOl *l = *f;
3563 while (l) {
3564 if (l->tab == &PerlIO_stdio) {
3565 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3566 return s->stdio;
3567 }
3568 l = *PerlIONext(&l);
f7e7eb72 3569 }
4b069b44 3570 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
bd61b366 3571 return PerlIO_exportFILE(f, NULL);
9e353e3b
NIS
3572}
3573
b9d6bf13 3574/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS
3575void
3576PerlIO_releaseFILE(PerlIO *p, FILE *f)
3577