This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Re: What if NV_PRESERVES_UV_BITS is undef? (was: Re: [PATCH] Configure test code...
[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++) {
a951d81d
BL
648 SV *arg = proto->array[i].arg;
649#ifdef sv_dup
650 if (arg && param)
651 arg = sv_dup(arg, param);
652#else
653 PERL_UNUSED_ARG(param);
654#endif
694c95cf
JH
655 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
656 }
3a1ee7e8
NIS
657 }
658 return list;
659}
4a4a6116 660
05d1247b 661void
3a1ee7e8 662PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 663{
3aaf42a7 664#ifdef USE_ITHREADS
3a1ee7e8
NIS
665 PerlIO **table = &proto->Iperlio;
666 PerlIO *f;
667 PL_perlio = NULL;
668 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
669 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
670 PerlIO_allocate(aTHX); /* root slot is never used */
a25429c6 671 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
3a1ee7e8
NIS
672 while ((f = *table)) {
673 int i;
674 table = (PerlIO **) (f++);
675 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
676 if (*f) {
93a8090d 677 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
678 }
679 f++;
680 }
681 }
1b6737cc 682#else
a25429c6 683 PERL_UNUSED_CONTEXT;
1b6737cc
AL
684 PERL_UNUSED_ARG(proto);
685 PERL_UNUSED_ARG(param);
3aaf42a7 686#endif
9a6404c5
DM
687}
688
689void
13621cfb
NIS
690PerlIO_destruct(pTHX)
691{
97aff369 692 dVAR;
a1ea730d 693 PerlIO **table = &PL_perlio;
14a5cf38 694 PerlIO *f;
694c95cf 695#ifdef USE_ITHREADS
a25429c6 696 PerlIO_debug("Destruct %p\n",(void*)aTHX);
694c95cf 697#endif
14a5cf38
JH
698 while ((f = *table)) {
699 int i;
700 table = (PerlIO **) (f++);
701 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
702 PerlIO *x = f;
dcda55fc 703 const PerlIOl *l;
14a5cf38
JH
704 while ((l = *x)) {
705 if (l->tab->kind & PERLIO_K_DESTRUCT) {
706 PerlIO_debug("Destruct popping %s\n", l->tab->name);
707 PerlIO_flush(x);
708 PerlIO_pop(aTHX_ x);
709 }
710 else {
711 x = PerlIONext(x);
712 }
713 }
714 f++;
715 }
716 }
13621cfb
NIS
717}
718
719void
a999f61b 720PerlIO_pop(pTHX_ PerlIO *f)
760ac839 721{
dcda55fc 722 const PerlIOl *l = *f;
14a5cf38 723 if (l) {
fe5a182c 724 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
725 if (l->tab->Popped) {
726 /*
727 * If popped returns non-zero do not free its layer structure
728 * it has either done so itself, or it is shared and still in
71200d45 729 * use
14a5cf38 730 */
f62ce20a 731 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
732 return;
733 }
b47cad08 734 *f = l->next;
3a1ee7e8 735 Safefree(l);
a8c08ecd 736 }
6f9d8c32
NIS
737}
738
39f7a870
JH
739/* Return as an array the stack of layers on a filehandle. Note that
740 * the stack is returned top-first in the array, and there are three
741 * times as many array elements as there are layers in the stack: the
742 * first element of a layer triplet is the name, the second one is the
743 * arguments, and the third one is the flags. */
744
745AV *
746PerlIO_get_layers(pTHX_ PerlIO *f)
747{
97aff369 748 dVAR;
dcda55fc 749 AV * const av = newAV();
39f7a870 750
dcda55fc
AL
751 if (PerlIOValid(f)) {
752 PerlIOl *l = PerlIOBase(f);
753
754 while (l) {
755 SV * const name = l->tab && l->tab->name ?
756 newSVpv(l->tab->name, 0) : &PL_sv_undef;
757 SV * const arg = l->tab && l->tab->Getarg ?
758 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
759 av_push(av, name);
760 av_push(av, arg);
761 av_push(av, newSViv((IV)l->flags));
762 l = l->next;
763 }
764 }
39f7a870 765
dcda55fc 766 return av;
39f7a870
JH
767}
768
9e353e3b 769/*--------------------------------------------------------------------------------------*/
14a5cf38 770/*
71200d45 771 * XS Interface for perl code
14a5cf38 772 */
9e353e3b 773
fcf2db38 774PerlIO_funcs *
2edd7e44 775PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 776{
27da23d5 777 dVAR;
14a5cf38
JH
778 IV i;
779 if ((SSize_t) len <= 0)
780 len = strlen(name);
3a1ee7e8 781 for (i = 0; i < PL_known_layers->cur; i++) {
46c461b5 782 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
a9f76400 783 if (memEQ(f->name, name, len) && f->name[len] == 0) {
fe5a182c 784 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
785 return f;
786 }
787 }
3a1ee7e8
NIS
788 if (load && PL_subname && PL_def_layerlist
789 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
790 if (PL_in_load_module) {
791 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
792 return NULL;
793 } else {
396482e1 794 SV * const pkgsv = newSVpvs("PerlIO");
46c461b5
AL
795 SV * const layer = newSVpvn(name, len);
796 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
797 ENTER;
d7a09b41 798 SAVEINT(PL_in_load_module);
c9bca74a 799 if (cv) {
9cfa90c0 800 SAVEGENERICSV(PL_warnhook);
b37c2d43 801 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
c9bca74a 802 }
d7a09b41
SR
803 PL_in_load_module++;
804 /*
805 * The two SVs are magically freed by load_module
806 */
a0714e2c 807 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
d7a09b41
SR
808 PL_in_load_module--;
809 LEAVE;
810 return PerlIO_find_layer(aTHX_ name, len, 0);
811 }
14a5cf38
JH
812 }
813 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
814 return NULL;
f3862f8b
NIS
815}
816
2a1bc955 817#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
818
819static int
820perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
821{
14a5cf38 822 if (SvROK(sv)) {
dcda55fc
AL
823 IO * const io = GvIOn((GV *) SvRV(sv));
824 PerlIO * const ifp = IoIFP(io);
825 PerlIO * const ofp = IoOFP(io);
be2597df
MHM
826 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
827 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
14a5cf38
JH
828 }
829 return 0;
b13b2135
NIS
830}
831
832static int
833perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
834{
14a5cf38 835 if (SvROK(sv)) {
dcda55fc
AL
836 IO * const io = GvIOn((GV *) SvRV(sv));
837 PerlIO * const ifp = IoIFP(io);
838 PerlIO * const ofp = IoOFP(io);
be2597df
MHM
839 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
840 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
14a5cf38
JH
841 }
842 return 0;
b13b2135
NIS
843}
844
845static int
846perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
847{
be2597df 848 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
14a5cf38 849 return 0;
b13b2135
NIS
850}
851
852static int
853perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
854{
be2597df 855 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
14a5cf38 856 return 0;
b13b2135
NIS
857}
858
859MGVTBL perlio_vtab = {
14a5cf38
JH
860 perlio_mg_get,
861 perlio_mg_set,
22569500 862 NULL, /* len */
14a5cf38
JH
863 perlio_mg_clear,
864 perlio_mg_free
b13b2135
NIS
865};
866
867XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
868{
14a5cf38 869 dXSARGS;
dcda55fc
AL
870 SV * const sv = SvRV(ST(1));
871 AV * const av = newAV();
14a5cf38
JH
872 MAGIC *mg;
873 int count = 0;
874 int i;
875 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
876 SvRMAGICAL_off(sv);
877 mg = mg_find(sv, PERL_MAGIC_ext);
878 mg->mg_virtual = &perlio_vtab;
879 mg_magical(sv);
be2597df 880 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
14a5cf38
JH
881 for (i = 2; i < items; i++) {
882 STRLEN len;
dcda55fc
AL
883 const char * const name = SvPV_const(ST(i), len);
884 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
14a5cf38 885 if (layer) {
b37c2d43 886 av_push(av, SvREFCNT_inc_simple_NN(layer));
14a5cf38
JH
887 }
888 else {
889 ST(count) = ST(i);
890 count++;
891 }
892 }
893 SvREFCNT_dec(av);
894 XSRETURN(count);
895}
896
22569500 897#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 898
e3f3bf95
NIS
899SV *
900PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 901{
89529cee 902 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
46c461b5 903 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
14a5cf38 904 return sv;
e3f3bf95
NIS
905}
906
5ca1d77f 907XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 908{
37725cdc 909 /* This is used as a %SIG{__WARN__} handler to supress warnings
c9bca74a
NIS
910 during loading of layers.
911 */
97aff369 912 dVAR;
c9bca74a
NIS
913 dXSARGS;
914 if (items)
e62f0680 915 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
c9bca74a
NIS
916 XSRETURN(0);
917}
918
5ca1d77f 919XS(XS_PerlIO__Layer__find)
0c4f7ff0 920{
97aff369 921 dVAR;
14a5cf38
JH
922 dXSARGS;
923 if (items < 2)
924 Perl_croak(aTHX_ "Usage class->find(name[,load])");
925 else {
de009b76 926 STRLEN len;
46c461b5 927 const char * const name = SvPV_const(ST(1), len);
de009b76 928 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
46c461b5 929 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
14a5cf38
JH
930 ST(0) =
931 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
932 &PL_sv_undef;
933 XSRETURN(1);
934 }
0c4f7ff0
NIS
935}
936
e3f3bf95
NIS
937void
938PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
939{
97aff369 940 dVAR;
3a1ee7e8
NIS
941 if (!PL_known_layers)
942 PL_known_layers = PerlIO_list_alloc(aTHX);
a0714e2c 943 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
fe5a182c 944 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
945}
946
1141d9f8 947int
fcf2db38 948PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 949{
97aff369 950 dVAR;
14a5cf38
JH
951 if (names) {
952 const char *s = names;
953 while (*s) {
954 while (isSPACE(*s) || *s == ':')
955 s++;
956 if (*s) {
957 STRLEN llen = 0;
958 const char *e = s;
bd61b366 959 const char *as = NULL;
14a5cf38
JH
960 STRLEN alen = 0;
961 if (!isIDFIRST(*s)) {
962 /*
963 * Message is consistent with how attribute lists are
964 * passed. Even though this means "foo : : bar" is
71200d45 965 * seen as an invalid separator character.
14a5cf38 966 */
de009b76 967 const char q = ((*s == '\'') ? '"' : '\'');
99ef548b 968 if (ckWARN(WARN_LAYER))
22569500 969 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 970 "Invalid separator character %c%c%c in PerlIO layer specification %s",
1e616cf5 971 q, *s, q, s);
93189314 972 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
973 return -1;
974 }
975 do {
976 e++;
977 } while (isALNUM(*e));
978 llen = e - s;
979 if (*e == '(') {
980 int nesting = 1;
981 as = ++e;
982 while (nesting) {
983 switch (*e++) {
984 case ')':
985 if (--nesting == 0)
986 alen = (e - 1) - as;
987 break;
988 case '(':
989 ++nesting;
990 break;
991 case '\\':
992 /*
993 * It's a nul terminated string, not allowed
994 * to \ the terminating null. Anything other
71200d45 995 * character is passed over.
14a5cf38
JH
996 */
997 if (*e++) {
998 break;
999 }
1000 /*
71200d45 1001 * Drop through
14a5cf38
JH
1002 */
1003 case '\0':
1004 e--;
22569500
NIS
1005 if (ckWARN(WARN_LAYER))
1006 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 1007 "Argument list not closed for PerlIO layer \"%.*s\"",
14a5cf38
JH
1008 (int) (e - s), s);
1009 return -1;
1010 default:
1011 /*
71200d45 1012 * boring.
14a5cf38
JH
1013 */
1014 break;
1015 }
1016 }
1017 }
1018 if (e > s) {
46c461b5 1019 PerlIO_funcs * const layer =
14a5cf38
JH
1020 PerlIO_find_layer(aTHX_ s, llen, 1);
1021 if (layer) {
a951d81d
BL
1022 SV *arg = NULL;
1023 if (as)
1024 arg = newSVpvn(as, alen);
3a1ee7e8 1025 PerlIO_list_push(aTHX_ av, layer,
a951d81d
BL
1026 (arg) ? arg : &PL_sv_undef);
1027 if (arg)
1028 SvREFCNT_dec(arg);
14a5cf38
JH
1029 }
1030 else {
041457d9 1031 if (ckWARN(WARN_LAYER))
b4581f09 1032 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
14a5cf38
JH
1033 (int) llen, s);
1034 return -1;
1035 }
1036 }
1037 s = e;
1038 }
1039 }
1040 }
1041 return 0;
1141d9f8
NIS
1042}
1043
dfebf958 1044void
fcf2db38 1045PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 1046{
97aff369 1047 dVAR;
27da23d5 1048 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 1049#ifdef PERLIO_USING_CRLF
6ce75a77 1050 tab = &PerlIO_crlf;
846be114 1051#else
6ce75a77 1052 if (PerlIO_stdio.Set_ptrcnt)
22569500 1053 tab = &PerlIO_stdio;
846be114 1054#endif
14a5cf38 1055 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 1056 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 1057 &PL_sv_undef);
dfebf958
NIS
1058}
1059
e3f3bf95 1060SV *
14a5cf38 1061PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 1062{
14a5cf38 1063 return av->array[n].arg;
e3f3bf95
NIS
1064}
1065
f3862f8b 1066PerlIO_funcs *
14a5cf38 1067PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1068{
14a5cf38
JH
1069 if (n >= 0 && n < av->cur) {
1070 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1071 av->array[n].funcs->name);
1072 return av->array[n].funcs;
1073 }
1074 if (!def)
1075 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1076 return def;
e3f3bf95
NIS
1077}
1078
4ec2216f
NIS
1079IV
1080PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1081{
8772537c
AL
1082 PERL_UNUSED_ARG(mode);
1083 PERL_UNUSED_ARG(arg);
1084 PERL_UNUSED_ARG(tab);
4ec2216f
NIS
1085 if (PerlIOValid(f)) {
1086 PerlIO_flush(f);
1087 PerlIO_pop(aTHX_ f);
1088 return 0;
1089 }
1090 return -1;
1091}
1092
27da23d5 1093PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS
1094 sizeof(PerlIO_funcs),
1095 "pop",
1096 0,
1097 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1098 PerlIOPop_pushed,
1099 NULL,
1100 NULL,
1101 NULL,
1102 NULL,
1103 NULL,
1104 NULL,
1105 NULL,
1106 NULL,
1107 NULL,
1108 NULL,
de009b76
AL
1109 NULL,
1110 NULL,
4ec2216f
NIS
1111 NULL, /* flush */
1112 NULL, /* fill */
1113 NULL,
1114 NULL,
1115 NULL,
1116 NULL,
1117 NULL, /* get_base */
1118 NULL, /* get_bufsiz */
1119 NULL, /* get_ptr */
1120 NULL, /* get_cnt */
1121 NULL, /* set_ptrcnt */
1122};
1123
fcf2db38 1124PerlIO_list_t *
e3f3bf95
NIS
1125PerlIO_default_layers(pTHX)
1126{
97aff369 1127 dVAR;
3a1ee7e8 1128 if (!PL_def_layerlist) {
bd61b366 1129 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
27da23d5 1130 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1131 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1132 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1133#if defined(WIN32)
27da23d5 1134 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1135#if 0
14a5cf38 1136 osLayer = &PerlIO_win32;
0c4128ad 1137#endif
2f8118af 1138#endif
27da23d5
JH
1139 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1140 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1141 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1142 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
06da4f11 1143#ifdef HAS_MMAP
27da23d5 1144 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
06da4f11 1145#endif
27da23d5
JH
1146 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1147 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1148 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
3a1ee7e8 1149 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1150 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1151 &PL_sv_undef);
1152 if (s) {
3a1ee7e8 1153 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1154 }
1155 else {
3a1ee7e8 1156 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1157 }
1141d9f8 1158 }
3a1ee7e8
NIS
1159 if (PL_def_layerlist->cur < 2) {
1160 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1161 }
3a1ee7e8 1162 return PL_def_layerlist;
e3f3bf95
NIS
1163}
1164
0c4f7ff0
NIS
1165void
1166Perl_boot_core_PerlIO(pTHX)
1167{
1168#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1169 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1170 __FILE__);
0c4f7ff0 1171#endif
14a5cf38 1172 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1173 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1174}
e3f3bf95
NIS
1175
1176PerlIO_funcs *
1177PerlIO_default_layer(pTHX_ I32 n)
1178{
97aff369 1179 dVAR;
46c461b5 1180 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
14a5cf38
JH
1181 if (n < 0)
1182 n += av->cur;
27da23d5 1183 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS
1184}
1185
a999f61b
NIS
1186#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1187#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1188
1189void
1141d9f8 1190PerlIO_stdstreams(pTHX)
60382766 1191{
97aff369 1192 dVAR;
a1ea730d 1193 if (!PL_perlio) {
14a5cf38
JH
1194 PerlIO_allocate(aTHX);
1195 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1196 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1197 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1198 }
60382766
NIS
1199}
1200
1201PerlIO *
27da23d5 1202PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1203{
2dc2558e
NIS
1204 if (tab->fsize != sizeof(PerlIO_funcs)) {
1205 mismatch:
1206 Perl_croak(aTHX_ "Layer does not match this perl");
1207 }
1208 if (tab->size) {
b464bac0 1209 PerlIOl *l;
2dc2558e
NIS
1210 if (tab->size < sizeof(PerlIOl)) {
1211 goto mismatch;
1212 }
1213 /* Real layer with a data area */
002e75cf
JH
1214 if (f) {
1215 char *temp;
1216 Newxz(temp, tab->size, char);
1217 l = (PerlIOl*)temp;
1218 if (l) {
1219 l->next = *f;
1220 l->tab = (PerlIO_funcs*) tab;
1221 *f = l;
1222 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1223 (void*)f, tab->name,
1224 (mode) ? mode : "(Null)", (void*)arg);
1225 if (*l->tab->Pushed &&
1226 (*l->tab->Pushed)
1227 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1228 PerlIO_pop(aTHX_ f);
1229 return NULL;
1230 }
2dc2558e 1231 }
002e75cf
JH
1232 else
1233 return NULL;
2dc2558e
NIS
1234 }
1235 }
1236 else if (f) {
1237 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1238 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1239 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1240 if (tab->Pushed &&
27da23d5 1241 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1242 return NULL;
14a5cf38
JH
1243 }
1244 }
1245 return f;
60382766
NIS
1246}
1247
dfebf958 1248IV
86e05cf2
NIS
1249PerlIOBase_binmode(pTHX_ PerlIO *f)
1250{
1251 if (PerlIOValid(f)) {
1252 /* Is layer suitable for raw stream ? */
1253 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1254 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1255 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1256 }
1257 else {
1258 /* Not suitable - pop it */
1259 PerlIO_pop(aTHX_ f);
1260 }
1261 return 0;
1262 }
1263 return -1;
1264}
1265
1266IV
2dc2558e 1267PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1268{
8772537c
AL
1269 PERL_UNUSED_ARG(mode);
1270 PERL_UNUSED_ARG(arg);
1271 PERL_UNUSED_ARG(tab);
86e05cf2 1272
04892f78 1273 if (PerlIOValid(f)) {
86e05cf2 1274 PerlIO *t;
de009b76 1275 const PerlIOl *l;
14a5cf38 1276 PerlIO_flush(f);
86e05cf2
NIS
1277 /*
1278 * Strip all layers that are not suitable for a raw stream
1279 */
1280 t = f;
1281 while (t && (l = *t)) {
1282 if (l->tab->Binmode) {
1283 /* Has a handler - normal case */
1284 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1285 if (*t == l) {
1286 /* Layer still there - move down a layer */
1287 t = PerlIONext(t);
1288 }
1289 }
1290 else {
1291 return -1;
1292 }
14a5cf38
JH
1293 }
1294 else {
86e05cf2
NIS
1295 /* No handler - pop it */
1296 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1297 }
1298 }
86e05cf2
NIS
1299 if (PerlIOValid(f)) {
1300 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1301 return 0;
1302 }
14a5cf38
JH
1303 }
1304 return -1;
dfebf958
NIS
1305}
1306
ac27b0f5 1307int
14a5cf38 1308PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1309 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1310{
14a5cf38
JH
1311 int code = 0;
1312 while (n < max) {
8772537c 1313 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
14a5cf38
JH
1314 if (tab) {
1315 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1316 code = -1;
1317 break;
1318 }
1319 }
1320 n++;
1321 }
1322 return code;
e3f3bf95
NIS
1323}
1324
1325int
ac27b0f5
NIS
1326PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1327{
14a5cf38 1328 int code = 0;
53f1b6d2 1329 if (f && names) {
8772537c 1330 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1331 code = PerlIO_parse_layers(aTHX_ layers, names);
1332 if (code == 0) {
d9dac8cd 1333 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1334 }
3a1ee7e8 1335 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1336 }
14a5cf38 1337 return code;
ac27b0f5
NIS
1338}
1339
f3862f8b 1340
60382766 1341/*--------------------------------------------------------------------------------------*/
14a5cf38 1342/*
71200d45 1343 * Given the abstraction above the public API functions
14a5cf38 1344 */
60382766
NIS
1345
1346int
f5b9d040 1347PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1348{
68b5363f
PD
1349 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1350 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1351 iotype, mode, (names) ? names : "(Null)");
1352
03c0554d
NIS
1353 if (names) {
1354 /* Do not flush etc. if (e.g.) switching encodings.
1355 if a pushed layer knows it needs to flush lower layers
1356 (for example :unix which is never going to call them)
1357 it can do the flush when it is pushed.
1358 */
1359 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1360 }
1361 else {
86e05cf2 1362 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1363#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1364 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1365 O_BINARY so we can look for it in mode.
1366 */
1367 if (!(mode & O_BINARY)) {
1368 /* Text mode */
86e05cf2
NIS
1369 /* FIXME?: Looking down the layer stack seems wrong,
1370 but is a way of reaching past (say) an encoding layer
1371 to flip CRLF-ness of the layer(s) below
1372 */
03c0554d
NIS
1373 while (*f) {
1374 /* Perhaps we should turn on bottom-most aware layer
1375 e.g. Ilya's idea that UNIX TTY could serve
1376 */
1377 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1378 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1379 /* Not in text mode - flush any pending stuff and flip it */
1380 PerlIO_flush(f);
1381 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1382 }
1383 /* Only need to turn it on in one layer so we are done */
1384 return TRUE;
ed53a2bb 1385 }
03c0554d 1386 f = PerlIONext(f);
14a5cf38 1387 }
03c0554d
NIS
1388 /* Not finding a CRLF aware layer presumably means we are binary
1389 which is not what was requested - so we failed
1390 We _could_ push :crlf layer but so could caller
1391 */
1392 return FALSE;
14a5cf38 1393 }
6ce75a77 1394#endif
86e05cf2
NIS
1395 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1396 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1397 */
a0714e2c 1398 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
14a5cf38 1399 }
f5b9d040
NIS
1400}
1401
f5b9d040 1402int
e87a358a 1403PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1404{
37725cdc 1405 if (PerlIOValid(f)) {
46c461b5 1406 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
37725cdc
NIS
1407 if (tab && tab->Close)
1408 return (*tab->Close)(aTHX_ f);
1409 else
1410 return PerlIOBase_close(aTHX_ f);
1411 }
14a5cf38 1412 else {
93189314 1413 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1414 return -1;
1415 }
76ced9ad
NIS
1416}
1417
b931b1d9 1418int
e87a358a 1419Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1420{
de009b76 1421 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS
1422 while (PerlIOValid(f)) {
1423 PerlIO_pop(aTHX_ f);
f6c77cf1 1424 }
14a5cf38 1425 return code;
b931b1d9
NIS
1426}
1427
b931b1d9 1428int
e87a358a 1429Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1430{
97aff369 1431 dVAR;
b32dd47e 1432 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS
1433}
1434
1141d9f8 1435
fcf2db38 1436static PerlIO_funcs *
2edd7e44
NIS
1437PerlIO_layer_from_ref(pTHX_ SV *sv)
1438{
97aff369 1439 dVAR;
14a5cf38 1440 /*
71200d45 1441 * For any scalar type load the handler which is bundled with perl
14a5cf38 1442 */
75208dda
RGS
1443 if (SvTYPE(sv) < SVt_PVAV) {
1444 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1445 /* This isn't supposed to happen, since PerlIO::scalar is core,
1446 * but could happen anyway in smaller installs or with PAR */
1447 if (!f && ckWARN(WARN_LAYER))
1448 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1449 return f;
1450 }
14a5cf38
JH
1451
1452 /*
71200d45 1453 * For other types allow if layer is known but don't try and load it
14a5cf38
JH
1454 */
1455 switch (SvTYPE(sv)) {
1456 case SVt_PVAV:
6a245ed1 1457 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
14a5cf38 1458 case SVt_PVHV:
6a245ed1 1459 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
14a5cf38 1460 case SVt_PVCV:
6a245ed1 1461 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
14a5cf38 1462 case SVt_PVGV:
6a245ed1 1463 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
42d0e0b7
AL
1464 default:
1465 return NULL;
14a5cf38 1466 }
2edd7e44
NIS
1467}
1468
fcf2db38 1469PerlIO_list_t *
14a5cf38
JH
1470PerlIO_resolve_layers(pTHX_ const char *layers,
1471 const char *mode, int narg, SV **args)
1472{
97aff369 1473 dVAR;
14a5cf38
JH
1474 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1475 int incdef = 1;
a1ea730d 1476 if (!PL_perlio)
14a5cf38
JH
1477 PerlIO_stdstreams(aTHX);
1478 if (narg) {
dcda55fc 1479 SV * const arg = *args;
14a5cf38 1480 /*
71200d45
NIS
1481 * If it is a reference but not an object see if we have a handler
1482 * for it
14a5cf38
JH
1483 */
1484 if (SvROK(arg) && !sv_isobject(arg)) {
46c461b5 1485 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
14a5cf38 1486 if (handler) {
3a1ee7e8
NIS
1487 def = PerlIO_list_alloc(aTHX);
1488 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1489 incdef = 0;
1490 }
1491 /*
e934609f 1492 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1493 * something sensible else we will just stringfy and open
71200d45 1494 * resulting string.
14a5cf38
JH
1495 */
1496 }
1497 }
9fe371da 1498 if (!layers || !*layers)
11bcd5da 1499 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH
1500 if (layers && *layers) {
1501 PerlIO_list_t *av;
1502 if (incdef) {
a951d81d 1503 av = PerlIO_clone_list(aTHX_ def, NULL);
14a5cf38
JH
1504 }
1505 else {
1506 av = def;
1507 }
0cff2cf3
NIS
1508 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1509 return av;
1510 }
1511 else {
1512 PerlIO_list_free(aTHX_ av);
b37c2d43 1513 return NULL;
0cff2cf3 1514 }
14a5cf38
JH
1515 }
1516 else {
1517 if (incdef)
1518 def->refcnt++;
1519 return def;
1520 }
ee518936
NIS
1521}
1522
1523PerlIO *
14a5cf38
JH
1524PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1525 int imode, int perm, PerlIO *f, int narg, SV **args)
1526{
97aff369 1527 dVAR;
14a5cf38
JH
1528 if (!f && narg == 1 && *args == &PL_sv_undef) {
1529 if ((f = PerlIO_tmpfile())) {
9fe371da 1530 if (!layers || !*layers)
11bcd5da 1531 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH
1532 if (layers && *layers)
1533 PerlIO_apply_layers(aTHX_ f, mode, layers);
1534 }
1535 }
1536 else {
de009b76 1537 PerlIO_list_t *layera;
14a5cf38
JH
1538 IV n;
1539 PerlIO_funcs *tab = NULL;
04892f78 1540 if (PerlIOValid(f)) {
14a5cf38 1541 /*
71200d45
NIS
1542 * This is "reopen" - it is not tested as perl does not use it
1543 * yet
14a5cf38
JH
1544 */
1545 PerlIOl *l = *f;
3a1ee7e8 1546 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1547 while (l) {
a951d81d
BL
1548 SV *arg = NULL;
1549 if (l->tab->Getarg)
1550 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1551 PerlIO_list_push(aTHX_ layera, l->tab,
1552 (arg) ? arg : &PL_sv_undef);
1553 if (arg)
1554 SvREFCNT_dec(arg);
14a5cf38
JH
1555 l = *PerlIONext(&l);
1556 }
1557 }
1558 else {
1559 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS
1560 if (!layera) {
1561 return NULL;
1562 }
14a5cf38
JH
1563 }
1564 /*
71200d45 1565 * Start at "top" of layer stack
14a5cf38
JH
1566 */
1567 n = layera->cur - 1;
1568 while (n >= 0) {
46c461b5 1569 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
14a5cf38
JH
1570 if (t && t->Open) {
1571 tab = t;
1572 break;
1573 }
1574 n--;
1575 }
1576 if (tab) {
1577 /*
71200d45 1578 * Found that layer 'n' can do opens - call it
14a5cf38 1579 */
7cf31beb 1580 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1581 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1582 }
14a5cf38 1583 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
355d3743
PD
1584 tab->name, layers ? layers : "(Null)", mode, fd,
1585 imode, perm, (void*)f, narg, (void*)args);
210e727c
JH
1586 if (tab->Open)
1587 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1588 f, narg, args);
1589 else {
1590 SETERRNO(EINVAL, LIB_INVARG);
1591 f = NULL;
1592 }
14a5cf38
JH
1593 if (f) {
1594 if (n + 1 < layera->cur) {
1595 /*
1596 * More layers above the one that we used to open -
71200d45 1597 * apply them now
14a5cf38 1598 */
d9dac8cd
NIS
1599 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1600 /* If pushing layers fails close the file */
1601 PerlIO_close(f);
14a5cf38
JH
1602 f = NULL;
1603 }
1604 }
1605 }
1606 }
3a1ee7e8 1607 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH
1608 }
1609 return f;
ee518936 1610}
b931b1d9
NIS
1611
1612
9e353e3b 1613SSize_t
e87a358a 1614Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1615{
b32dd47e 1616 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1617}
1618
313ca112 1619SSize_t
e87a358a 1620Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1621{
b32dd47e 1622 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1623}
1624
9e353e3b 1625SSize_t
e87a358a 1626Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1627{
b32dd47e 1628 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1629}
1630
6f9d8c32 1631int
e87a358a 1632Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1633{
b32dd47e 1634 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW
1635}
1636
9e353e3b 1637Off_t
e87a358a 1638Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1639{
b32dd47e 1640 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW
1641}
1642
6f9d8c32 1643int
e87a358a 1644Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1645{
97aff369 1646 dVAR;
14a5cf38
JH
1647 if (f) {
1648 if (*f) {
de009b76 1649 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1650
1651 if (tab && tab->Flush)
f62ce20a 1652 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH
1653 else
1654 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH
1655 }
1656 else {
fe5a182c 1657 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1658 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1659 return -1;
1660 }
1661 }
1662 else {
1663 /*
1664 * Is it good API design to do flush-all on NULL, a potentially
1665 * errorneous input? Maybe some magical value (PerlIO*
1666 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1667 * things on fflush(NULL), but should we be bound by their design
71200d45 1668 * decisions? --jhi
14a5cf38 1669 */
a1ea730d 1670 PerlIO **table = &PL_perlio;
14a5cf38
JH
1671 int code = 0;
1672 while ((f = *table)) {
1673 int i;
1674 table = (PerlIO **) (f++);
1675 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1676 if (*f && PerlIO_flush(f) != 0)
1677 code = -1;
1678 f++;
1679 }
1680 }
1681 return code;
1682 }
760ac839
LW
1683}
1684
a9c883f6 1685void
f62ce20a 1686PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1687{
97aff369 1688 dVAR;
a1ea730d 1689 PerlIO **table = &PL_perlio;
14a5cf38
JH
1690 PerlIO *f;
1691 while ((f = *table)) {
1692 int i;
1693 table = (PerlIO **) (f++);
1694 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1695 if (*f
1696 && (PerlIOBase(f)->
1697 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1698 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1699 PerlIO_flush(f);
1700 f++;
1701 }
a9c883f6 1702 }
a9c883f6
NIS
1703}
1704
06da4f11 1705int
e87a358a 1706Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1707{
b32dd47e 1708 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS
1709}
1710
f3862f8b
NIS
1711int
1712PerlIO_isutf8(PerlIO *f)
1713{
1b7a0411
JH
1714 if (PerlIOValid(f))
1715 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1716 else
1717 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1718
1b7a0411 1719 return -1;
f3862f8b
NIS
1720}
1721
6f9d8c32 1722int
e87a358a 1723Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1724{
b32dd47e 1725 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS
1726}
1727
9e353e3b 1728int
e87a358a 1729Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1730{
b32dd47e 1731 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS
1732}
1733
9e353e3b 1734void
e87a358a 1735Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1736{
b32dd47e 1737 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS
1738}
1739
9e353e3b 1740void
e87a358a 1741Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1742{
b32dd47e 1743 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS
1744}
1745
9e353e3b
NIS
1746int
1747PerlIO_has_base(PerlIO *f)
1748{
1b7a0411 1749 if (PerlIOValid(f)) {
46c461b5 1750 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1751
1752 if (tab)
1753 return (tab->Get_base != NULL);
1754 SETERRNO(EINVAL, LIB_INVARG);
1755 }
1756 else
1757 SETERRNO(EBADF, SS_IVCHAN);
1758
1759 return 0;
760ac839
LW
1760}
1761
9e353e3b
NIS
1762int
1763PerlIO_fast_gets(PerlIO *f)
760ac839 1764{
04892f78 1765 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
46c461b5 1766 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1767
1768 if (tab)
1769 return (tab->Set_ptrcnt != NULL);
1770 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1771 }
1b7a0411
JH
1772 else
1773 SETERRNO(EBADF, SS_IVCHAN);
1774
14a5cf38 1775 return 0;
9e353e3b
NIS
1776}
1777
9e353e3b
NIS
1778int
1779PerlIO_has_cntptr(PerlIO *f)
1780{
04892f78 1781 if (PerlIOValid(f)) {
46c461b5 1782 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1783
1784 if (tab)
1785 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1786 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1787 }
1b7a0411
JH
1788 else
1789 SETERRNO(EBADF, SS_IVCHAN);
1790
14a5cf38 1791 return 0;
9e353e3b
NIS
1792}
1793
9e353e3b
NIS
1794int
1795PerlIO_canset_cnt(PerlIO *f)
1796{
04892f78 1797 if (PerlIOValid(f)) {
46c461b5 1798 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1799
1800 if (tab)
1801 return (tab->Set_ptrcnt != NULL);
1802 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1803 }
1b7a0411
JH
1804 else
1805 SETERRNO(EBADF, SS_IVCHAN);
1806
14a5cf38 1807 return 0;
760ac839
LW
1808}
1809
888911fc 1810STDCHAR *
e87a358a 1811Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1812{
b32dd47e 1813 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS
1814}
1815
9e353e3b 1816int
e87a358a 1817Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1818{
b32dd47e 1819 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS
1820}
1821
9e353e3b 1822STDCHAR *
e87a358a 1823Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1824{
b32dd47e 1825 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS
1826}
1827
05d1247b 1828int
e87a358a 1829Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1830{
b32dd47e 1831 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS
1832}
1833
9e353e3b 1834void
e87a358a 1835Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1836{
b32dd47e 1837 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS
1838}
1839
9e353e3b 1840void
e87a358a 1841Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1842{
b32dd47e 1843 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS
1844}
1845
4ec2216f 1846
9e353e3b 1847/*--------------------------------------------------------------------------------------*/
14a5cf38 1848/*
71200d45 1849 * utf8 and raw dummy layers
14a5cf38 1850 */
dfebf958 1851
26fb694e 1852IV
2dc2558e 1853PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1854{
96a5add6 1855 PERL_UNUSED_CONTEXT;
8772537c
AL
1856 PERL_UNUSED_ARG(mode);
1857 PERL_UNUSED_ARG(arg);
00f51856 1858 if (PerlIOValid(f)) {
14a5cf38
JH
1859 if (tab->kind & PERLIO_K_UTF8)
1860 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1861 else
1862 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1863 return 0;
1864 }
1865 return -1;
26fb694e
NIS
1866}
1867
27da23d5 1868PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1869 sizeof(PerlIO_funcs),
14a5cf38 1870 "utf8",
2dc2558e 1871 0,
6874a2de 1872 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1873 PerlIOUtf8_pushed,
1874 NULL,
1875 NULL,
1876 NULL,
1877 NULL,
1878 NULL,
1879 NULL,
1880 NULL,
1881 NULL,
1882 NULL,
1883 NULL,
de009b76
AL
1884 NULL,
1885 NULL,
22569500
NIS
1886 NULL, /* flush */
1887 NULL, /* fill */
14a5cf38
JH
1888 NULL,
1889 NULL,
1890 NULL,
1891 NULL,
22569500
NIS
1892 NULL, /* get_base */
1893 NULL, /* get_bufsiz */
1894 NULL, /* get_ptr */
1895 NULL, /* get_cnt */
1896 NULL, /* set_ptrcnt */
26fb694e
NIS
1897};
1898
27da23d5 1899PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1900 sizeof(PerlIO_funcs),
14a5cf38 1901 "bytes",
2dc2558e 1902 0,
14a5cf38
JH
1903 PERLIO_K_DUMMY,
1904 PerlIOUtf8_pushed,
1905 NULL,
1906 NULL,
1907 NULL,
1908 NULL,
1909 NULL,
1910 NULL,
1911 NULL,
1912 NULL,
1913 NULL,
1914 NULL,
de009b76
AL
1915 NULL,
1916 NULL,
22569500
NIS
1917 NULL, /* flush */
1918 NULL, /* fill */
14a5cf38
JH
1919 NULL,
1920 NULL,
1921 NULL,
1922 NULL,
22569500
NIS
1923 NULL, /* get_base */
1924 NULL, /* get_bufsiz */
1925 NULL, /* get_ptr */
1926 NULL, /* get_cnt */
1927 NULL, /* set_ptrcnt */
dfebf958
NIS
1928};
1929
1930PerlIO *
14a5cf38
JH
1931PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1932 IV n, const char *mode, int fd, int imode, int perm,
1933 PerlIO *old, int narg, SV **args)
dfebf958 1934{
8772537c
AL
1935 PerlIO_funcs * const tab = PerlIO_default_btm();
1936 PERL_UNUSED_ARG(self);
210e727c
JH
1937 if (tab && tab->Open)
1938 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1939 old, narg, args);
1940 SETERRNO(EINVAL, LIB_INVARG);
1941 return NULL;
dfebf958
NIS
1942}
1943
27da23d5 1944PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1945 sizeof(PerlIO_funcs),
14a5cf38 1946 "raw",
2dc2558e 1947 0,
14a5cf38
JH
1948 PERLIO_K_DUMMY,
1949 PerlIORaw_pushed,
1950 PerlIOBase_popped,
1951 PerlIORaw_open,
1952 NULL,
1953 NULL,
1954 NULL,
1955 NULL,
1956 NULL,
1957 NULL,
1958 NULL,
1959 NULL,
de009b76
AL
1960 NULL,
1961 NULL,
22569500
NIS
1962 NULL, /* flush */
1963 NULL, /* fill */
14a5cf38
JH
1964 NULL,
1965 NULL,
1966 NULL,
1967 NULL,
22569500
NIS
1968 NULL, /* get_base */
1969 NULL, /* get_bufsiz */
1970 NULL, /* get_ptr */
1971 NULL, /* get_cnt */
1972 NULL, /* set_ptrcnt */
dfebf958
NIS
1973};
1974/*--------------------------------------------------------------------------------------*/
1975/*--------------------------------------------------------------------------------------*/
14a5cf38 1976/*
71200d45 1977 * "Methods" of the "base class"
14a5cf38 1978 */
9e353e3b
NIS
1979
1980IV
f62ce20a 1981PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1982{
04892f78 1983 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1984}
1985
f5b9d040 1986char *
81428673 1987PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1988{
1989 char *s = buf;
81428673 1990 if (PerlIOValid(f)) {
de009b76 1991 const IV flags = PerlIOBase(f)->flags;
81428673
NIS
1992 if (flags & PERLIO_F_APPEND) {
1993 *s++ = 'a';
1994 if (flags & PERLIO_F_CANREAD) {
1995 *s++ = '+';
1996 }
14a5cf38 1997 }
81428673
NIS
1998 else if (flags & PERLIO_F_CANREAD) {
1999 *s++ = 'r';
2000 if (flags & PERLIO_F_CANWRITE)
2001 *s++ = '+';
2002 }
2003 else if (flags & PERLIO_F_CANWRITE) {
2004 *s++ = 'w';
2005 if (flags & PERLIO_F_CANREAD) {
2006 *s++ = '+';
2007 }
14a5cf38 2008 }
35990314 2009#ifdef PERLIO_USING_CRLF
81428673
NIS
2010 if (!(flags & PERLIO_F_CRLF))
2011 *s++ = 'b';
5f1a76d0 2012#endif
81428673 2013 }
14a5cf38
JH
2014 *s = '\0';
2015 return buf;
f5b9d040
NIS
2016}
2017
81428673 2018
76ced9ad 2019IV
2dc2558e 2020PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 2021{
de009b76 2022 PerlIOl * const l = PerlIOBase(f);
96a5add6 2023 PERL_UNUSED_CONTEXT;
8772537c 2024 PERL_UNUSED_ARG(arg);
de009b76 2025
14a5cf38
JH
2026 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2027 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2028 if (tab->Set_ptrcnt != NULL)
2029 l->flags |= PERLIO_F_FASTGETS;
2030 if (mode) {
3b6c1aba 2031 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2032 mode++;
2033 switch (*mode++) {
2034 case 'r':
2035 l->flags |= PERLIO_F_CANREAD;
2036 break;
2037 case 'a':
2038 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2039 break;
2040 case 'w':
2041 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2042 break;
2043 default:
93189314 2044 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2045 return -1;
2046 }
2047 while (*mode) {
2048 switch (*mode++) {
2049 case '+':
2050 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2051 break;
2052 case 'b':
2053 l->flags &= ~PERLIO_F_CRLF;
2054 break;
2055 case 't':
2056 l->flags |= PERLIO_F_CRLF;
2057 break;
2058 default:
93189314 2059 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2060 return -1;
2061 }
2062 }
2063 }
2064 else {
2065 if (l->next) {
2066 l->flags |= l->next->flags &
2067 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2068 PERLIO_F_APPEND);
2069 }
2070 }
5e2ab84b 2071#if 0
14a5cf38 2072 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
6c9570dc 2073 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
14a5cf38 2074 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 2075#endif
14a5cf38 2076 return 0;
76ced9ad
NIS
2077}
2078
2079IV
f62ce20a 2080PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2081{
96a5add6 2082 PERL_UNUSED_CONTEXT;
8772537c 2083 PERL_UNUSED_ARG(f);
14a5cf38 2084 return 0;
760ac839
LW
2085}
2086
9e353e3b 2087SSize_t
f62ce20a 2088PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2089{
14a5cf38 2090 /*
71200d45 2091 * Save the position as current head considers it
14a5cf38 2092 */
de009b76 2093 const Off_t old = PerlIO_tell(f);
a0714e2c 2094 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
14a5cf38 2095 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2096 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS
2097}
2098
f6c77cf1 2099SSize_t
f62ce20a 2100PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2101{
14a5cf38
JH
2102 STDCHAR *buf = (STDCHAR *) vbuf;
2103 if (f) {
263df5f1
JH
2104 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2105 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2106 SETERRNO(EBADF, SS_IVCHAN);
2107 return 0;
2108 }
14a5cf38 2109 while (count > 0) {
93c2c2ec
IZ
2110 get_cnt:
2111 {
14a5cf38
JH
2112 SSize_t avail = PerlIO_get_cnt(f);
2113 SSize_t take = 0;
2114 if (avail > 0)
bb7a0f54 2115 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
14a5cf38
JH
2116 if (take > 0) {
2117 STDCHAR *ptr = PerlIO_get_ptr(f);
2118 Copy(ptr, buf, take, STDCHAR);
2119 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2120 count -= take;
2121 buf += take;
93c2c2ec
IZ
2122 if (avail == 0) /* set_ptrcnt could have reset avail */
2123 goto get_cnt;
14a5cf38
JH
2124 }
2125 if (count > 0 && avail <= 0) {
2126 if (PerlIO_fill(f) != 0)
2127 break;
2128 }
93c2c2ec 2129 }
14a5cf38
JH
2130 }
2131 return (buf - (STDCHAR *) vbuf);
2132 }
f6c77cf1 2133 return 0;
f6c77cf1
NIS
2134}
2135
9e353e3b 2136IV
f62ce20a 2137PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2138{
96a5add6 2139 PERL_UNUSED_CONTEXT;
8772537c 2140 PERL_UNUSED_ARG(f);
14a5cf38 2141 return 0;
9e353e3b
NIS
2142}
2143
2144IV
f62ce20a 2145PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2146{
96a5add6 2147 PERL_UNUSED_CONTEXT;
8772537c 2148 PERL_UNUSED_ARG(f);
14a5cf38 2149 return -1;
06da4f11
NIS
2150}
2151
2152IV
f62ce20a 2153PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2154{
37725cdc
NIS
2155 IV code = -1;
2156 if (PerlIOValid(f)) {
2157 PerlIO *n = PerlIONext(f);
2158 code = PerlIO_flush(f);
2159 PerlIOBase(f)->flags &=
2160 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2161 while (PerlIOValid(n)) {
de009b76 2162 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS
2163 if (tab && tab->Close) {
2164 if ((*tab->Close)(aTHX_ n) != 0)
2165 code = -1;
2166 break;
2167 }
2168 else {
2169 PerlIOBase(n)->flags &=
2170 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2171 }
2172 n = PerlIONext(n);
2173 }
2174 }
2175 else {
2176 SETERRNO(EBADF, SS_IVCHAN);
2177 }
14a5cf38 2178 return code;
9e353e3b
NIS
2179}
2180
2181IV
f62ce20a 2182PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2183{
96a5add6 2184 PERL_UNUSED_CONTEXT;
04892f78 2185 if (PerlIOValid(f)) {
14a5cf38
JH
2186 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2187 }
2188 return 1;
9e353e3b
NIS
2189}
2190
2191IV
f62ce20a 2192PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2193{
96a5add6 2194 PERL_UNUSED_CONTEXT;
04892f78 2195 if (PerlIOValid(f)) {
14a5cf38
JH
2196 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2197 }
2198 return 1;
9e353e3b
NIS
2199}
2200
2201void
f62ce20a 2202PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2203{
04892f78 2204 if (PerlIOValid(f)) {
dcda55fc 2205 PerlIO * const n = PerlIONext(f);
14a5cf38 2206 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2207 if (PerlIOValid(n))
14a5cf38
JH
2208 PerlIO_clearerr(n);
2209 }
9e353e3b
NIS
2210}
2211
2212void
f62ce20a 2213PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2214{
96a5add6 2215 PERL_UNUSED_CONTEXT;
04892f78 2216 if (PerlIOValid(f)) {
14a5cf38
JH
2217 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2218 }
9e353e3b
NIS
2219}
2220
93a8090d
NIS
2221SV *
2222PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2223{
2224 if (!arg)
a0714e2c 2225 return NULL;
93a8090d
NIS
2226#ifdef sv_dup
2227 if (param) {
a951d81d
BL
2228 arg = sv_dup(arg, param);
2229 SvREFCNT_inc_simple_void_NN(arg);
2230 return arg;
93a8090d
NIS
2231 }
2232 else {
2233 return newSVsv(arg);
2234 }
2235#else
1b6737cc 2236 PERL_UNUSED_ARG(param);
93a8090d
NIS
2237 return newSVsv(arg);
2238#endif
2239}
2240
2241PerlIO *
ecdeb87c 2242PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d 2243{
1b6737cc 2244 PerlIO * const nexto = PerlIONext(o);
04892f78 2245 if (PerlIOValid(nexto)) {
de009b76 2246 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS
2247 if (tab && tab->Dup)
2248 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2249 else
2250 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2251 }
2252 if (f) {
dcda55fc 2253 PerlIO_funcs * const self = PerlIOBase(o)->tab;
a951d81d 2254 SV *arg = NULL;
93a8090d 2255 char buf[8];
fe5a182c
JH
2256 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2257 self->name, (void*)f, (void*)o, (void*)param);
210e727c
JH
2258 if (self->Getarg)
2259 arg = (*self->Getarg)(aTHX_ o, param, flags);
93a8090d 2260 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
a951d81d 2261 if (arg)
93a8090d 2262 SvREFCNT_dec(arg);
93a8090d
NIS
2263 }
2264 return f;
2265}
2266
27da23d5 2267/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d 2268
8b84d7dd 2269/* Must be called with PL_perlio_mutex locked. */
22c96fc1
NC
2270static void
2271S_more_refcounted_fds(pTHX_ const int new_fd) {
7a89be66 2272 dVAR;
22c96fc1 2273 const int old_max = PL_perlio_fd_refcnt_size;
f4ae5be6 2274 const int new_max = 16 + (new_fd & ~15);
22c96fc1
NC
2275 int *new_array;
2276
2277 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2278 old_max, new_fd, new_max);
2279
2280 if (new_fd < old_max) {
2281 return;
2282 }
2283
f4ae5be6
NC
2284 assert (new_max > new_fd);
2285
eae082a0
JH
2286 /* Use plain realloc() since we need this memory to be really
2287 * global and visible to all the interpreters and/or threads. */
2288 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
22c96fc1
NC
2289
2290 if (!new_array) {
8b84d7dd 2291#ifdef USE_ITHREADS
6cb8cb21 2292 MUTEX_UNLOCK(&PL_perlio_mutex);
22c96fc1
NC
2293#endif
2294 /* Can't use PerlIO to write as it allocates memory */
2295 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2296 PL_no_mem, strlen(PL_no_mem));
2297 my_exit(1);
2298 }
2299
2300 PL_perlio_fd_refcnt_size = new_max;
2301 PL_perlio_fd_refcnt = new_array;
2302
95b63a38
JH
2303 PerlIO_debug("Zeroing %p, %d\n",
2304 (void*)(new_array + old_max),
2305 new_max - old_max);
22c96fc1
NC
2306
2307 Zero(new_array + old_max, new_max - old_max, int);
2308}
2309
2310
93a8090d
NIS
2311void
2312PerlIO_init(pTHX)
2313{
8b84d7dd 2314 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
96a5add6 2315 PERL_UNUSED_CONTEXT;
93a8090d
NIS
2316}
2317
168d5872
NIS
2318void
2319PerlIOUnix_refcnt_inc(int fd)
2320{
27da23d5 2321 dTHX;
22c96fc1 2322 if (fd >= 0) {
97aff369 2323 dVAR;
22c96fc1 2324
8b84d7dd 2325#ifdef USE_ITHREADS
6cb8cb21 2326 MUTEX_LOCK(&PL_perlio_mutex);
168d5872 2327#endif
22c96fc1
NC
2328 if (fd >= PL_perlio_fd_refcnt_size)
2329 S_more_refcounted_fds(aTHX_ fd);
2330
27da23d5 2331 PL_perlio_fd_refcnt[fd]++;
8b84d7dd
RGS
2332 if (PL_perlio_fd_refcnt[fd] <= 0) {
2333 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2334 fd, PL_perlio_fd_refcnt[fd]);
2335 }
2336 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2337 fd, PL_perlio_fd_refcnt[fd]);
22c96fc1 2338
8b84d7dd 2339#ifdef USE_ITHREADS
6cb8cb21 2340 MUTEX_UNLOCK(&PL_perlio_mutex);
168d5872 2341#endif
8b84d7dd
RGS
2342 } else {
2343 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
168d5872
NIS
2344 }
2345}
2346
168d5872
NIS
2347int
2348PerlIOUnix_refcnt_dec(int fd)
2349{
27da23d5 2350 dTHX;
168d5872 2351 int cnt = 0;
22c96fc1 2352 if (fd >= 0) {
97aff369 2353 dVAR;
8b84d7dd 2354#ifdef USE_ITHREADS
6cb8cb21 2355 MUTEX_LOCK(&PL_perlio_mutex);
168d5872 2356#endif
8b84d7dd
RGS
2357 if (fd >= PL_perlio_fd_refcnt_size) {
2358 Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
2359 fd, PL_perlio_fd_refcnt_size);
2360 }
2361 if (PL_perlio_fd_refcnt[fd] <= 0) {
2362 Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
2363 fd, PL_perlio_fd_refcnt[fd]);
2364 }
27da23d5 2365 cnt = --PL_perlio_fd_refcnt[fd];
8b84d7dd
RGS
2366 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2367#ifdef USE_ITHREADS
6cb8cb21 2368 MUTEX_UNLOCK(&PL_perlio_mutex);
168d5872 2369#endif
8b84d7dd
RGS
2370 } else {
2371 Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
168d5872
NIS
2372 }
2373 return cnt;
2374}
2375
694c95cf
JH
2376void
2377PerlIO_cleanup(pTHX)
2378{
97aff369 2379 dVAR;
694c95cf
JH
2380 int i;
2381#ifdef USE_ITHREADS
a25429c6 2382 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
9f4bd222
NIS
2383#else
2384 PerlIO_debug("Cleanup layers\n");
694c95cf 2385#endif
e47547a8 2386
694c95cf
JH
2387 /* Raise STDIN..STDERR refcount so we don't close them */
2388 for (i=0; i < 3; i++)
2389 PerlIOUnix_refcnt_inc(i);
2390 PerlIO_cleantable(aTHX_ &PL_perlio);
2391 /* Restore STDIN..STDERR refcount */
2392 for (i=0; i < 3; i++)
2393 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2394
2395 if (PL_known_layers) {
2396 PerlIO_list_free(aTHX_ PL_known_layers);
2397 PL_known_layers = NULL;
2398 }
27da23d5 2399 if (PL_def_layerlist) {
9f4bd222
NIS
2400 PerlIO_list_free(aTHX_ PL_def_layerlist);
2401 PL_def_layerlist = NULL;
2402 }
6cb8cb21
RGS
2403}
2404
2405void PerlIO_teardown(pTHX) /* Call only from PERL_SYS_TERM(). */
2406{
53d44271 2407 dVAR;
6cb8cb21
RGS
2408#ifdef DEBUGGING
2409 {
2410 /* By now all filehandles should have been closed, so any
2411 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2412 * errors. */
2413 int i;
2414 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2415 if (PL_perlio_fd_refcnt[i])
2416 PerlIO_debug("PerlIO_cleanup: fd %d refcnt=%d\n",
2417 i, PL_perlio_fd_refcnt[i]);
2418 }
2419 }
2420#endif
eae082a0
JH
2421 /* Not bothering with PL_perlio_mutex since by now
2422 * all the interpreters are gone. */
1cd82952
RGS
2423 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2424 && PL_perlio_fd_refcnt) {
eae082a0 2425 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
432ce874
YO
2426 PL_perlio_fd_refcnt = NULL;
2427 PL_perlio_fd_refcnt_size = 0;
1cd82952 2428 }
694c95cf
JH
2429}
2430
9e353e3b 2431/*--------------------------------------------------------------------------------------*/
14a5cf38 2432/*
71200d45 2433 * Bottom-most level for UNIX-like case
14a5cf38 2434 */
9e353e3b 2435
14a5cf38 2436typedef struct {
22569500
NIS
2437 struct _PerlIO base; /* The generic part */
2438 int fd; /* UNIX like file descriptor */
2439 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2440} PerlIOUnix;
2441
6f9d8c32 2442int
9e353e3b 2443PerlIOUnix_oflags(const char *mode)
760ac839 2444{
14a5cf38 2445 int oflags = -1;
3b6c1aba 2446 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH
2447 mode++;
2448 switch (*mode) {
2449 case 'r':
2450 oflags = O_RDONLY;
2451 if (*++mode == '+') {
2452 oflags = O_RDWR;
2453 mode++;
2454 }
2455 break;
2456
2457 case 'w':
2458 oflags = O_CREAT | O_TRUNC;
2459 if (*++mode == '+') {
2460 oflags |= O_RDWR;
2461 mode++;
2462 }
2463 else
2464 oflags |= O_WRONLY;
2465 break;
2466
2467 case 'a':
2468 oflags = O_CREAT | O_APPEND;
2469 if (*++mode == '+') {
2470 oflags |= O_RDWR;
2471 mode++;
2472 }
2473 else
2474 oflags |= O_WRONLY;
2475 break;
2476 }
2477 if (*mode == 'b') {
2478 oflags |= O_BINARY;
2479 oflags &= ~O_TEXT;
2480 mode++;
2481 }
2482 else if (*mode == 't') {
2483 oflags |= O_TEXT;
2484 oflags &= ~O_BINARY;
2485 mode++;
2486 }
2487 /*
71200d45 2488 * Always open in binary mode
14a5cf38
JH
2489 */
2490 oflags |= O_BINARY;
2491 if (*mode || oflags == -1) {
93189314 2492 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2493 oflags = -1;
2494 }
2495 return oflags;
9e353e3b
NIS
2496}
2497
2498IV
f62ce20a 2499PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2500{
96a5add6 2501 PERL_UNUSED_CONTEXT;
14a5cf38 2502 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2503}
2504
aa063c35
NIS
2505static void
2506PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2507{
de009b76 2508 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2509#if defined(WIN32)
aa063c35
NIS
2510 Stat_t st;
2511 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2512 if (!S_ISREG(st.st_mode)) {
aa063c35 2513 PerlIO_debug("%d is not regular file\n",fd);
6caa5a9c
NIS
2514 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2515 }
aa063c35
NIS
2516 else {
2517 PerlIO_debug("%d _is_ a regular file\n",fd);
2518 }
6caa5a9c
NIS
2519 }
2520#endif
aa063c35
NIS
2521 s->fd = fd;
2522 s->oflags = imode;
2523 PerlIOUnix_refcnt_inc(fd);
96a5add6 2524 PERL_UNUSED_CONTEXT;
aa063c35
NIS
2525}
2526
2527IV
2528PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2529{
2530 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2531 if (*PerlIONext(f)) {
4b069b44 2532 /* We never call down so do any pending stuff now */
03c0554d 2533 PerlIO_flush(PerlIONext(f));
14a5cf38 2534 /*
71200d45 2535 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2536 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2537 * Should the value on NULL mode be 0 or -1?
14a5cf38 2538 */
acbd16bf 2539 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2540 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH
2541 }
2542 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2543
14a5cf38 2544 return code;
4b803d04
NIS
2545}
2546
c2fcde81
JH
2547IV
2548PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2549{
de009b76 2550 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2551 Off_t new_loc;
96a5add6 2552 PERL_UNUSED_CONTEXT;
c2fcde81
JH
2553 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2554#ifdef ESPIPE
2555 SETERRNO(ESPIPE, LIB_INVARG);
2556#else
2557 SETERRNO(EINVAL, LIB_INVARG);
2558#endif
2559 return -1;
2560 }
0723351e
NC
2561 new_loc = PerlLIO_lseek(fd, offset, whence);
2562 if (new_loc == (Off_t) - 1)
dcda55fc 2563 return -1;
c2fcde81
JH
2564 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2565 return 0;
2566}
2567
9e353e3b 2568PerlIO *
14a5cf38
JH
2569PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2570 IV n, const char *mode, int fd, int imode,
2571 int perm, PerlIO *f, int narg, SV **args)
2572{
d9dac8cd 2573 if (PerlIOValid(f)) {
14a5cf38 2574 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2575 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2576 }
2577 if (narg > 0) {
3b6c1aba 2578 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH
2579 mode++;
2580 else {
2581 imode = PerlIOUnix_oflags(mode);
2582 perm = 0666;
2583 }
2584 if (imode != -1) {
e62f0680 2585 const char *path = SvPV_nolen_const(*args);
14a5cf38
JH
2586 fd = PerlLIO_open3(path, imode, perm);
2587 }
2588 }
2589 if (fd >= 0) {
3b6c1aba 2590 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2591 mode++;
2592 if (!f) {
2593 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2594 }
2595 if (!PerlIOValid(f)) {
a33cf58c
NIS
2596 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2597 return NULL;
2598 }
d9dac8cd 2599 }
aa063c35 2600 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2601 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH
2602 if (*mode == IoTYPE_APPEND)
2603 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH
2604 return f;
2605 }
2606 else {
2607 if (f) {
6f207bd3 2608 NOOP;
14a5cf38 2609 /*
71200d45 2610 * FIXME: pop layers ???
14a5cf38
JH
2611 */
2612 }
2613 return NULL;
2614 }
9e353e3b
NIS
2615}
2616
71200d45 2617PerlIO *
ecdeb87c 2618PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 2619{
dcda55fc 2620 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2621 int fd = os->fd;
ecdeb87c
NIS
2622 if (flags & PERLIO_DUP_FD) {
2623 fd = PerlLIO_dup(fd);
2624 }
22c96fc1 2625 if (fd >= 0) {
ecdeb87c 2626 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2627 if (f) {
2628 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2629 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS
2630 return f;
2631 }
71200d45
NIS
2632 }
2633 return NULL;
2634}
2635
2636
9e353e3b 2637SSize_t
f62ce20a 2638PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2639{
97aff369 2640 dVAR;
de009b76 2641 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2642#ifdef PERLIO_STD_SPECIAL
2643 if (fd == 0)
2644 return PERLIO_STD_IN(fd, vbuf, count);
2645#endif
81428673 2646 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2647 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2648 return 0;
1fd8f4ce 2649 }
14a5cf38 2650 while (1) {
b464bac0 2651 const SSize_t len = PerlLIO_read(fd, vbuf, count);
14a5cf38 2652 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2653 if (len < 0) {
2654 if (errno != EAGAIN) {
2655 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2656 }
2657 }
2658 else if (len == 0 && count != 0) {
14a5cf38 2659 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS
2660 SETERRNO(0,0);
2661 }
14a5cf38
JH
2662 return len;
2663 }
2664 PERL_ASYNC_CHECK();
2665 }
b464bac0 2666 /*NOTREACHED*/
9e353e3b
NIS
2667}
2668
2669SSize_t
f62ce20a 2670PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2671{
97aff369 2672 dVAR;
de009b76 2673 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2674#ifdef PERLIO_STD_SPECIAL
2675 if (fd == 1 || fd == 2)
2676 return PERLIO_STD_OUT(fd, vbuf, count);
2677#endif
14a5cf38 2678 while (1) {
de009b76 2679 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2680 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2681 if (len < 0) {
2682 if (errno != EAGAIN) {
2683 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2684 }
2685 }
14a5cf38
JH
2686 return len;
2687 }
2688 PERL_ASYNC_CHECK();
06da4f11 2689 }
1b6737cc 2690 /*NOTREACHED*/
9e353e3b
NIS
2691}
2692
9e353e3b 2693Off_t
f62ce20a 2694PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2695{
96a5add6
AL
2696 PERL_UNUSED_CONTEXT;
2697
14a5cf38 2698 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2699}
2700
71200d45 2701
9e353e3b 2702IV
f62ce20a 2703PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2704{
97aff369 2705 dVAR;
de009b76 2706 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2707 int code = 0;
168d5872
NIS
2708 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2709 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2710 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2711 return 0;
22569500 2712 }
93a8090d
NIS
2713 }
2714 else {
93189314 2715 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2716 return -1;
2717 }
14a5cf38
JH
2718 while (PerlLIO_close(fd) != 0) {
2719 if (errno != EINTR) {
2720 code = -1;
2721 break;
2722 }
2723 PERL_ASYNC_CHECK();
2724 }
2725 if (code == 0) {
2726 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2727 }
2728 return code;
9e353e3b
NIS
2729}
2730
27da23d5 2731PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2732 sizeof(PerlIO_funcs),
14a5cf38
JH
2733 "unix",
2734 sizeof(PerlIOUnix),
2735 PERLIO_K_RAW,
2736 PerlIOUnix_pushed,
44798d05 2737 PerlIOBase_popped,
14a5cf38 2738 PerlIOUnix_open,
86e05cf2 2739 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2740 NULL,
2741 PerlIOUnix_fileno,
71200d45 2742 PerlIOUnix_dup,
14a5cf38
JH
2743 PerlIOUnix_read,
2744 PerlIOBase_unread,
2745 PerlIOUnix_write,
2746 PerlIOUnix_seek,
2747 PerlIOUnix_tell,
2748 PerlIOUnix_close,
22569500
NIS
2749 PerlIOBase_noop_ok, /* flush */
2750 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2751 PerlIOBase_eof,
2752 PerlIOBase_error,
2753 PerlIOBase_clearerr,
2754 PerlIOBase_setlinebuf,
22569500
NIS
2755 NULL, /* get_base */
2756 NULL, /* get_bufsiz */
2757 NULL, /* get_ptr */
2758 NULL, /* get_cnt */
2759 NULL, /* set_ptrcnt */
9e353e3b
NIS
2760};
2761
2762/*--------------------------------------------------------------------------------------*/
14a5cf38 2763/*
71200d45 2764 * stdio as a layer
14a5cf38 2765 */
9e353e3b 2766
313e59c8
NIS
2767#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2768/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2769 broken by the last second glibc 2.3 fix
2770 */
2771#define STDIO_BUFFER_WRITABLE
2772#endif
2773
2774
14a5cf38
JH
2775typedef struct {
2776 struct _PerlIO base;
22569500 2777 FILE *stdio; /* The stream */
9e353e3b
NIS
2778} PerlIOStdio;
2779
2780IV
f62ce20a 2781PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2782{
96a5add6
AL
2783 PERL_UNUSED_CONTEXT;
2784
c4420975
AL
2785 if (PerlIOValid(f)) {
2786 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2787 if (s)
2788 return PerlSIO_fileno(s);
439ba545
NIS
2789 }
2790 errno = EBADF;
2791 return -1;
9e353e3b
NIS
2792}
2793
766a733e 2794char *
14a5cf38
JH
2795PerlIOStdio_mode(const char *mode, char *tmode)
2796{
de009b76 2797 char * const ret = tmode;
a0625d38
SR
2798 if (mode) {
2799 while (*mode) {
2800 *tmode++ = *mode++;
2801 }
14a5cf38 2802 }
95005ad8 2803#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH
2804 *tmode++ = 'b';
2805#endif
14a5cf38
JH
2806 *tmode = '\0';
2807 return ret;
2808}
2809
4b803d04 2810IV
2dc2558e 2811PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2812{
1fd8f4ce
NIS
2813 PerlIO *n;
2814 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
46c461b5 2815 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
1fd8f4ce
NIS
2816 if (toptab == tab) {
2817 /* Top is already stdio - pop self (duplicate) and use original */
2818 PerlIO_pop(aTHX_ f);
2819 return 0;
2820 } else {
de009b76 2821 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS
2822 char tmode[8];
2823 FILE *stdio;
81428673 2824 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2825 mode = PerlIOStdio_mode(mode, tmode)))) {
2826 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2827 /* We never call down so do any pending stuff now */
2828 PerlIO_flush(PerlIONext(f));
81428673 2829 }
1fd8f4ce
NIS
2830 else {
2831 return -1;
2832 }
2833 }
14a5cf38 2834 }
2dc2558e 2835 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2836}
2837
22569500 2838
9e353e3b 2839PerlIO *
4b069b44 2840PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2841{
14a5cf38
JH
2842 dTHX;
2843 PerlIO *f = NULL;
2844 if (stdio) {
22569500 2845 PerlIOStdio *s;
4b069b44
NIS
2846 if (!mode || !*mode) {
2847 /* We need to probe to see how we can open the stream
2848 so start with read/write and then try write and read
2849 we dup() so that we can fclose without loosing the fd.
2850
2851 Note that the errno value set by a failing fdopen
2852 varies between stdio implementations.
2853 */
de009b76 2854 const int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2855 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2856 if (!f2) {
a33cf58c 2857 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2858 }
2859 if (!f2) {
a33cf58c 2860 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2861 }
2862 if (!f2) {
2863 /* Don't seem to be able to open */
2864 PerlLIO_close(fd);
2865 return f;
2866 }
2867 fclose(f2);
22569500 2868 }
a0714e2c 2869 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
a33cf58c
NIS
2870 s = PerlIOSelf(f, PerlIOStdio);
2871 s->stdio = stdio;
2872 }
14a5cf38
JH
2873 }
2874 return f;
9e353e3b
NIS
2875}
2876
2877PerlIO *
14a5cf38
JH
2878PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2879 IV n, const char *mode, int fd, int imode,
2880 int perm, PerlIO *f, int narg, SV **args)
2881{
2882 char tmode[8];
d9dac8cd 2883 if (PerlIOValid(f)) {
dcda55fc
AL
2884 const char * const path = SvPV_nolen_const(*args);
2885 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2886 FILE *stdio;
2887 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2888 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2889 s->stdio);
2890 if (!s->stdio)
2891 return NULL;
2892 s->stdio = stdio;
1751d015 2893 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2894 return f;
2895 }
2896 else {
2897 if (narg > 0) {
dcda55fc 2898 const char * const path = SvPV_nolen_const(*args);
3b6c1aba 2899 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
2900 mode++;
2901 fd = PerlLIO_open3(path, imode, perm);
2902 }
2903 else {
95005ad8
GH
2904 FILE *stdio;
2905 bool appended = FALSE;
2906#ifdef __CYGWIN__
2907 /* Cygwin wants its 'b' early. */
2908 appended = TRUE;
2909 mode = PerlIOStdio_mode(mode, tmode);
2910#endif
2911 stdio = PerlSIO_fopen(path, mode);
6f0313ac 2912 if (stdio) {
6f0313ac
JH
2913 if (!f) {
2914 f = PerlIO_allocate(aTHX);
2915 }
95005ad8
GH
2916 if (!appended)
2917 mode = PerlIOStdio_mode(mode, tmode);
2918 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2919 if (f) {
0f0f9e2b
JH
2920 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2921 PerlIOUnix_refcnt_inc(fileno(stdio));
2922 } else {
2923 PerlSIO_fclose(stdio);
6f0313ac
JH
2924 }
2925 return f;
2926 }
2927 else {
2928 return NULL;
2929 }
14a5cf38
JH
2930 }
2931 }
2932 if (fd >= 0) {
2933 FILE *stdio = NULL;
2934 int init = 0;
3b6c1aba 2935 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
2936 init = 1;
2937 mode++;
2938 }
2939 if (init) {
2940 switch (fd) {
2941 case 0:
2942 stdio = PerlSIO_stdin;
2943 break;
2944 case 1:
2945 stdio = PerlSIO_stdout;
2946 break;
2947 case 2:
2948 stdio = PerlSIO_stderr;
2949 break;
2950 }
2951 }
2952 else {
2953 stdio = PerlSIO_fdopen(fd, mode =
2954 PerlIOStdio_mode(mode, tmode));
2955 }
2956 if (stdio) {
d9dac8cd
NIS
2957 if (!f) {
2958 f = PerlIO_allocate(aTHX);
2959 }
a33cf58c 2960 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
1a159fba
JH
2961 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2962 PerlIOUnix_refcnt_inc(fileno(stdio));
a33cf58c 2963 }
14a5cf38
JH
2964 return f;
2965 }
2966 }
2967 }
ee518936 2968 return NULL;
9e353e3b
NIS
2969}
2970
1751d015 2971PerlIO *
ecdeb87c 2972PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2973{
2974 /* This assumes no layers underneath - which is what
2975 happens, but is not how I remember it. NI-S 2001/10/16
2976 */
ecdeb87c 2977 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2978 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 2979 const int fd = fileno(stdio);
9217ff3f 2980 char mode[8];
ecdeb87c 2981 if (flags & PERLIO_DUP_FD) {
de009b76 2982 const int dfd = PerlLIO_dup(fileno(stdio));
9217ff3f
NIS
2983 if (dfd >= 0) {
2984 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2985 goto set_this;
ecdeb87c
NIS
2986 }
2987 else {
6f207bd3 2988 NOOP;
ecdeb87c
NIS
2989 /* FIXME: To avoid messy error recovery if dup fails
2990 re-use the existing stdio as though flag was not set
2991 */
2992 }
2993 }
9217ff3f
NIS
2994 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2995 set_this:
694c95cf
JH
2996 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2997 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
2998 }
2999 return f;
3000}
3001
0d7a5398
NIS
3002static int
3003PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3004{
96a5add6
AL
3005 PERL_UNUSED_CONTEXT;
3006
0d7a5398 3007 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 3008 * PerlIO_set_fileno() support from Configure
0d7a5398 3009 */
ef8eacb8
AT
3010# if defined(__UCLIBC__)
3011 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3012 f->__filedes = -1;
3013 return 1;
3014# elif defined(__GLIBC__)
0d7a5398 3015 /* There may be a better way for GLIBC:
37725cdc 3016 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS
3017 */
3018 f->_fileno = -1;
3019 return 1;
3020# elif defined(__sun__)
f5992bc4 3021 PERL_UNUSED_ARG(f);
cfedb851 3022 return 0;
0d7a5398
NIS
3023# elif defined(__hpux)
3024 f->__fileH = 0xff;
3025 f->__fileL = 0xff;
3026 return 1;
9837d373 3027 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 3028 your platform does not have special entry try this one.
9837d373
NIS
3029 [For OSF only have confirmation for Tru64 (alpha)
3030 but assume other OSFs will be similar.]
37725cdc 3031 */
9837d373 3032# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
3033 f->_file = -1;
3034 return 1;
3035# elif defined(__FreeBSD__)
3036 /* There may be a better way on FreeBSD:
37725cdc
NIS
3037 - we could insert a dummy func in the _close function entry
3038 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3039 */
3040 f->_file = -1;
0c49ea6a
SU
3041 return 1;
3042# elif defined(__OpenBSD__)
3043 /* There may be a better way on OpenBSD:
3044 - we could insert a dummy func in the _close function entry
3045 f->_close = (int (*)(void *)) dummy_close;
3046 */
3047 f->_file = -1;
0d7a5398 3048 return 1;
59ad941d
IZ
3049# elif defined(__EMX__)
3050 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3051 f->_handle = -1;
3052 return 1;
0d7a5398
NIS
3053# elif defined(__CYGWIN__)
3054 /* There may be a better way on CYGWIN:
37725cdc
NIS
3055 - we could insert a dummy func in the _close function entry
3056 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3057 */
3058 f->_file = -1;
3059 return 1;
3060# elif defined(WIN32)
3061# if defined(__BORLANDC__)
3062 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
3063# elif defined(UNDER_CE)
3064 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3065 structure at all
3066 */
0d7a5398
NIS
3067# else
3068 f->_file = -1;
3069# endif
3070 return 1;
3071# else
3072#if 0
37725cdc 3073 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 3074 (which isn't thread safe) instead
37725cdc 3075 */
0d7a5398
NIS
3076# error "Don't know how to set FILE.fileno on your platform"
3077#endif
8772537c 3078 PERL_UNUSED_ARG(f);
0d7a5398
NIS
3079 return 0;
3080# endif
3081}
3082
1751d015 3083IV
f62ce20a 3084PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 3085{
c4420975 3086 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
3087 if (!stdio) {
3088 errno = EBADF;
3089 return -1;
3090 }
9217ff3f 3091 else {
de009b76 3092 const int fd = fileno(stdio);
0d7a5398 3093 int invalidate = 0;
bbfd922f 3094 IV result = 0;
0d7a5398
NIS
3095 int saveerr = 0;
3096 int dupfd = 0;
3097#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS
3098 /* Socks lib overrides close() but stdio isn't linked to
3099 that library (though we are) - so we must call close()
3100 on sockets on stdio's behalf.
3101 */
0d7a5398
NIS
3102 int optval;
3103 Sock_size_t optlen = sizeof(int);
6b4ce6c8 3104 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
37725cdc 3105 invalidate = 1;
0d7a5398 3106#endif
6b4ce6c8 3107 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
0d7a5398 3108 invalidate = 1;
0d7a5398 3109 if (invalidate) {
6b4ce6c8
AL
3110 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3111 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3112 return 0;
3113 if (stdio == stdout || stdio == stderr)
3114 return PerlIO_flush(f);
37725cdc
NIS
3115 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3116 Use Sarathy's trick from maint-5.6 to invalidate the
3117 fileno slot of the FILE *
3118 */
bbfd922f 3119 result = PerlIO_flush(f);
0d7a5398 3120 saveerr = errno;
6b4ce6c8
AL
3121 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3122 if (!invalidate)
3123 dupfd = PerlLIO_dup(fd);
37725cdc 3124 }
0d7a5398 3125 result = PerlSIO_fclose(stdio);
37725cdc
NIS
3126 /* We treat error from stdio as success if we invalidated
3127 errno may NOT be expected EBADF
e8529473
NIS
3128 */
3129 if (invalidate && result != 0) {
0d7a5398
NIS
3130 errno = saveerr;
3131 result = 0;
37725cdc 3132 }
6b4ce6c8
AL
3133#ifdef SOCKS5_VERSION_NAME
3134 /* in SOCKS' case, let close() determine return value */
3135 result = close(fd);
3136#endif
0d7a5398
NIS
3137 if (dupfd) {
3138 PerlLIO_dup2(dupfd,fd);
8a521f28 3139 PerlLIO_close(dupfd);
9217ff3f
NIS
3140 }
3141 return result;
37725cdc 3142 }
1751d015
NIS
3143}
3144
9e353e3b 3145SSize_t
f62ce20a 3146PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3147{
97aff369 3148 dVAR;
c4420975 3149 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3150 SSize_t got = 0;
4d948241
NIS
3151 for (;;) {
3152 if (count == 1) {
3153 STDCHAR *buf = (STDCHAR *) vbuf;
3154 /*
3155 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3156 * stdio does not do that for fread()
3157 */
de009b76 3158 const int ch = PerlSIO_fgetc(s);
4d948241
NIS
3159 if (ch != EOF) {
3160 *buf = ch;
3161 got = 1;
3162 }
14a5cf38 3163 }
4d948241
NIS
3164 else
3165 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS
3166 if (got == 0 && PerlSIO_ferror(s))
3167 got = -1;
42a7a32f 3168 if (got >= 0 || errno != EINTR)
4d948241
NIS
3169 break;
3170 PERL_ASYNC_CHECK();
42a7a32f 3171 SETERRNO(0,0); /* just in case */
14a5cf38 3172 }
14a5cf38 3173 return got;
9e353e3b
NIS
3174}
3175
3176SSize_t
f62ce20a 3177PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3178{
14a5cf38 3179 SSize_t unread = 0;
c4420975 3180 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3181
313e59c8 3182#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3183 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3184 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3185 STDCHAR *base = PerlIO_get_base(f);
3186 SSize_t cnt = PerlIO_get_cnt(f);
3187 STDCHAR *ptr = PerlIO_get_ptr(f);
3188 SSize_t avail = ptr - base;
3189 if (avail > 0) {
3190 if (avail > count) {
3191 avail = count;
3192 }
3193 ptr -= avail;
3194 Move(buf-avail,ptr,avail,STDCHAR);
3195 count -= avail;
3196 unread += avail;
3197 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
3198 if (PerlSIO_feof(s) && unread >= 0)
3199 PerlSIO_clearerr(s);
3200 }
3201 }
313e59c8
NIS
3202 else
3203#endif
3204 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3205 /* We can get pointer to buffer but not its base
3206 Do ungetc() but check chars are ending up in the
3207 buffer
3208 */
3209 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3210 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3211 while (count > 0) {
de009b76 3212 const int ch = *--buf & 0xFF;
9f7cd136
NIS
3213 if (ungetc(ch,s) != ch) {
3214 /* ungetc did not work */
3215 break;
3216 }
3217 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3218 /* Did not change pointer as expected */
3219 fgetc(s); /* get char back again */
3220 break;
3221 }
3222 /* It worked ! */
3223 count--;
3224 unread++;
93679785
NIS
3225 }
3226 }
3227
3228 if (count > 0) {
3229 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
3230 }
3231 return unread;
9e353e3b
NIS
3232}
3233
3234SSize_t
f62ce20a 3235PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3236{
97aff369 3237 dVAR;
4d948241
NIS
3238 SSize_t got;
3239 for (;;) {
3240 got = PerlSIO_fwrite(vbuf, 1, count,
3241 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3242 if (got >= 0 || errno != EINTR)
4d948241
NIS
3243 break;
3244 PERL_ASYNC_CHECK();
42a7a32f 3245 SETERRNO(0,0); /* just in case */
4d948241
NIS
3246 }
3247 return got;
9e353e3b
NIS
3248}
3249
94a175e1 3250IV
f62ce20a 3251PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3252{
c4420975 3253 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3254 PERL_UNUSED_CONTEXT;
3255
94a175e1 3256 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
3257}
3258
3259Off_t
f62ce20a 3260PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3261{
c4420975 3262 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3263 PERL_UNUSED_CONTEXT;
3264
94a175e1 3265 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3266}
3267
3268IV
f62ce20a 3269PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3270{
c4420975 3271 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3272 PERL_UNUSED_CONTEXT;
3273
14a5cf38
JH
3274 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3275 return PerlSIO_fflush(stdio);
3276 }
3277 else {
6f207bd3 3278 NOOP;
88b61e10 3279#if 0
14a5cf38
JH
3280 /*
3281 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3282 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3283 * design is to do _this_ but not have layer above flush this
71200d45 3284 * layer read-to-read
14a5cf38
JH
3285 */
3286 /*
71200d45 3287 * Not writeable - sync by attempting a seek
14a5cf38 3288 */
79852593 3289 const int err = errno;
14a5cf38
JH
3290 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3291 errno = err;
88b61e10 3292#endif
14a5cf38
JH
3293 }
3294 return 0;
9e353e3b
NIS
3295}
3296
3297IV
f62ce20a 3298PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3299{
96a5add6
AL
3300 PERL_UNUSED_CONTEXT;
3301
14a5cf38 3302 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3303}
3304
3305IV
f62ce20a 3306PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3307{
96a5add6
AL
3308 PERL_UNUSED_CONTEXT;
3309
263df5f1 3310 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3311}
3312
3313void
f62ce20a 3314PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3315{
96a5add6
AL
3316 PERL_UNUSED_CONTEXT;
3317
14a5cf38 3318 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3319}
3320
3321void
f62ce20a 3322PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 3323{
96a5add6
AL
3324 PERL_UNUSED_CONTEXT;
3325
9e353e3b 3326#ifdef HAS_SETLINEBUF
14a5cf38 3327 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3328#else
bd61b366 3329 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
9e353e3b
NIS
3330#endif
3331}
3332
3333#ifdef FILE_base
3334STDCHAR *
f62ce20a 3335PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3336{
c4420975 3337 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3338 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3339}
3340
3341Size_t
f62ce20a 3342PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3343{
c4420975 3344 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3345 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3346}
3347#endif
3348
3349#ifdef USE_STDIO_PTR
3350STDCHAR *
f62ce20a 3351PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3352{
c4420975 3353 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3354 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3355}
3356
3357SSize_t
f62ce20a 3358PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3359{
c4420975 3360 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3361 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3362}
3363
3364void
f62ce20a 3365PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3366{
c4420975 3367 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3368 if (ptr != NULL) {
9e353e3b 3369#ifdef STDIO_PTR_LVALUE
d06fc7d4 3370 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3371#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3372 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3373 assert(PerlSIO_get_cnt(stdio) == (cnt));
3374 }
9e353e3b
NIS
3375#endif
3376#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3377 /*
71200d45 3378 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3379 */
3380 return;
9e353e3b 3381#endif
22569500 3382#else /* STDIO_PTR_LVALUE */
14a5cf38 3383 PerlProc_abort();
22569500 3384#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3385 }
3386 /*
71200d45 3387 * Now (or only) set cnt
14a5cf38 3388 */
9e353e3b 3389#ifdef STDIO_CNT_LVALUE
14a5cf38 3390 PerlSIO_set_cnt(stdio, cnt);
22569500 3391#else /* STDIO_CNT_LVALUE */
9e353e3b 3392#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3393 PerlSIO_set_ptr(stdio,
3394 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3395 cnt));
22569500 3396#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3397 PerlProc_abort();
22569500
NIS
3398#endif /* STDIO_PTR_LVAL_SETS_CNT */
3399#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3400}
3401
93679785 3402
9e353e3b
NIS
3403#endif
3404
93679785
NIS
3405IV
3406PerlIOStdio_fill(pTHX_ PerlIO *f)
3407{
c4420975 3408 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3409 int c;
96a5add6
AL
3410 PERL_UNUSED_CONTEXT;
3411
93679785
NIS
3412 /*
3413 * fflush()ing read-only streams can cause trouble on some stdio-s
3414 */
3415 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3416 if (PerlSIO_fflush(stdio) != 0)
3417 return EOF;
3418 }
3419 c = PerlSIO_fgetc(stdio);
3420 if (c == EOF)
3421 return EOF;
3422
3423#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3424
3425#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3426 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3427 /* Fake ungetc() to the real buffer in case system's ungetc
3428 goes elsewhere
3429 */
3430 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3431 SSize_t cnt = PerlSIO_get_cnt(stdio);
3432 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3433 if (ptr == base+1) {
3434 *--ptr = (STDCHAR) c;
3435 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3436 if (PerlSIO_feof(stdio))
3437 PerlSIO_clearerr(stdio);
3438 return 0;
3439 }
3440 }
313e59c8
NIS
3441 else
3442#endif
3443 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3444 STDCHAR ch = c;
3445 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3446 return 0;
3447 }
3448 }
93679785
NIS
3449#endif
3450
3451#if defined(VMS)
3452 /* An ungetc()d char is handled separately from the regular
3453 * buffer, so we stuff it in the buffer ourselves.
3454 * Should never get called as should hit code above
3455 */
bad9695d
NIS
3456 *(--((*stdio)->_ptr)) = (unsigned char) c;
3457 (*stdio)->_cnt++;
93679785
NIS
3458#else
3459 /* If buffer snoop scheme above fails fall back to
9f7cd136 3460 using ungetc().
93679785
NIS
3461 */
3462 if (PerlSIO_ungetc(c, stdio) != c)
3463 return EOF;
3464#endif
3465 return 0;
3466}
3467
3468
3469
27da23d5 3470PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3471 sizeof(PerlIO_funcs),
14a5cf38
JH
3472 "stdio",
3473 sizeof(PerlIOStdio),
86e05cf2 3474 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3475 PerlIOStdio_pushed,
44798d05 3476 PerlIOBase_popped,
14a5cf38 3477 PerlIOStdio_open,
86e05cf2 3478 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3479 NULL,
3480 PerlIOStdio_fileno,
71200d45 3481 PerlIOStdio_dup,
14a5cf38
JH
3482 PerlIOStdio_read,
3483 PerlIOStdio_unread,
3484 PerlIOStdio_write,
3485 PerlIOStdio_seek,
3486 PerlIOStdio_tell,
3487 PerlIOStdio_close,
3488 PerlIOStdio_flush,
3489 PerlIOStdio_fill,
3490 PerlIOStdio_eof,
3491 PerlIOStdio_error,
3492 PerlIOStdio_clearerr,
3493 PerlIOStdio_setlinebuf,
9e353e3b 3494#ifdef FILE_base
14a5cf38
JH
3495 PerlIOStdio_get_base,
3496 PerlIOStdio_get_bufsiz,
9e353e3b 3497#else
14a5cf38
JH
3498 NULL,
3499 NULL,
9e353e3b
NIS
3500#endif
3501#ifdef USE_STDIO_PTR
14a5cf38
JH
3502 PerlIOStdio_get_ptr,
3503 PerlIOStdio_get_cnt,
15b61c98 3504# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3505 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3506# else
3507 NULL,
3508# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3509#else
3510 NULL,
14a5cf38
JH
3511 NULL,
3512 NULL,
15b61c98 3513#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3514};
3515
b9d6bf13
JH
3516/* Note that calls to PerlIO_exportFILE() are reversed using
3517 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3518FILE *
81428673 3519PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3520{
e87a358a 3521 dTHX;
81428673
NIS
3522 FILE *stdio = NULL;
3523 if (PerlIOValid(f)) {
3524 char buf[8];
3525 PerlIO_flush(f);
3526 if (!mode || !*mode) {
3527 mode = PerlIO_modestr(f, buf);
3528 }
3529 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3530 if (stdio) {
3531 PerlIOl *l = *f;
9f75cc58 3532 PerlIO *f2;
81428673
NIS
3533 /* De-link any lower layers so new :stdio sticks */
3534 *f = NULL;
a0714e2c 3535 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
9f75cc58 3536 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673
NIS
3537 s->stdio = stdio;
3538 /* Link previous lower layers under new one */
3539 *PerlIONext(f) = l;
3540 }
3541 else {
3542 /* restore layers list */
3543 *f = l;
3544 }
a33cf58c 3545 }
14a5cf38
JH
3546 }
3547 return stdio;
9e353e3b
NIS
3548}
3549
81428673 3550
9e353e3b
NIS
3551FILE *
3552PerlIO_findFILE(PerlIO *f)
3553{
14a5cf38
JH
3554 PerlIOl *l = *f;
3555 while (l) {
3556 if (l->tab == &PerlIO_stdio) {
3557 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3558 return s->stdio;
3559 }
3560 l = *PerlIONext(&l);
f7e7eb72 3561 }
4b069b44 3562 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
bd61b366 3563 return PerlIO_exportFILE(f, NULL);
9e353e3b
NIS
3564}
3565
b9d6bf13 3566/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS
3567void
3568PerlIO_releaseFILE(PerlIO *p, FILE *f)
3569{
27da23d5 3570 dVAR;