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[perl5.git] / perlio.c
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14a5cf38 1/*
5cb43542
RGS
2 * perlio.c
3 * Copyright (c) 1996-2006, Nick Ing-Simmons
c1d0198f 4 * Copyright (c) 2006, 2007, Larry Wall and others
5cb43542
RGS
5 *
6 * You may distribute under the terms of either the GNU General Public License
7 * or the Artistic License, as specified in the README file.
760ac839
LW
8 */
9
14a5cf38 10/*
d31a8517
AT
11 * Hour after hour for nearly three weary days he had jogged up and down,
12 * over passes, and through long dales, and across many streams.
13 */
14
166f8a29
DM
15/* This file contains the functions needed to implement PerlIO, which
16 * is Perl's private replacement for the C stdio library. This is used
17 * by default unless you compile with -Uuseperlio or run with
18 * PERLIO=:stdio (but don't do this unless you know what you're doing)
19 */
20
d31a8517 21/*
71200d45 22 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 23 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 24 * Invent a dSYS macro to abstract this out
14a5cf38 25 */
7bcba3d4
NIS
26#ifdef PERL_IMPLICIT_SYS
27#define dSYS dTHX
28#else
29#define dSYS dNOOP
30#endif
31
760ac839 32#define VOIDUSED 1
12ae5dfc
JH
33#ifdef PERL_MICRO
34# include "uconfig.h"
35#else
b0f06652
VK
36# ifndef USE_CROSS_COMPILE
37# include "config.h"
38# else
39# include "xconfig.h"
40# endif
12ae5dfc 41#endif
760ac839 42
6f9d8c32 43#define PERLIO_NOT_STDIO 0
760ac839 44#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 45/*
71200d45 46 * #define PerlIO FILE
14a5cf38 47 */
760ac839
LW
48#endif
49/*
6f9d8c32 50 * This file provides those parts of PerlIO abstraction
88b61e10 51 * which are not #defined in perlio.h.
6f9d8c32 52 * Which these are depends on various Configure #ifdef's
760ac839
LW
53 */
54
55#include "EXTERN.h"
864dbfa3 56#define PERL_IN_PERLIO_C
760ac839
LW
57#include "perl.h"
58
32af7c23
CL
59#ifdef PERL_IMPLICIT_CONTEXT
60#undef dSYS
61#define dSYS dTHX
62#endif
63
0c4f7ff0
NIS
64#include "XSUB.h"
65
9cffb111
OS
66#ifdef __Lynx__
67/* Missing proto on LynxOS */
68int mkstemp(char*);
69#endif
70
1b7a0411 71/* Call the callback or PerlIOBase, and return failure. */
b32dd47e 72#define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
1b7a0411 73 if (PerlIOValid(f)) { \
46c461b5 74 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
75 if (tab && tab->callback) \
76 return (*tab->callback) args; \
77 else \
78 return PerlIOBase_ ## base args; \
79 } \
80 else \
81 SETERRNO(EBADF, SS_IVCHAN); \
82 return failure
83
84/* Call the callback or fail, and return failure. */
b32dd47e 85#define Perl_PerlIO_or_fail(f, callback, failure, args) \
1b7a0411 86 if (PerlIOValid(f)) { \
46c461b5 87 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
88 if (tab && tab->callback) \
89 return (*tab->callback) args; \
90 SETERRNO(EINVAL, LIB_INVARG); \
91 } \
92 else \
93 SETERRNO(EBADF, SS_IVCHAN); \
94 return failure
95
96/* Call the callback or PerlIOBase, and be void. */
b32dd47e 97#define Perl_PerlIO_or_Base_void(f, callback, base, args) \
1b7a0411 98 if (PerlIOValid(f)) { \
46c461b5 99 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
100 if (tab && tab->callback) \
101 (*tab->callback) args; \
102 else \
103 PerlIOBase_ ## base args; \
1b7a0411
JH
104 } \
105 else \
106 SETERRNO(EBADF, SS_IVCHAN)
107
108/* Call the callback or fail, and be void. */
b32dd47e 109#define Perl_PerlIO_or_fail_void(f, callback, args) \
1b7a0411 110 if (PerlIOValid(f)) { \
46c461b5 111 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
112 if (tab && tab->callback) \
113 (*tab->callback) args; \
37725cdc
NIS
114 else \
115 SETERRNO(EINVAL, LIB_INVARG); \
1b7a0411
JH
116 } \
117 else \
118 SETERRNO(EBADF, SS_IVCHAN)
119
89a3a251
JH
120#if defined(__osf__) && _XOPEN_SOURCE < 500
121extern int fseeko(FILE *, off_t, int);
122extern off_t ftello(FILE *);
123#endif
124
71ab4674 125#ifndef USE_SFIO
a0c21aa1
JH
126
127EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
128
71ab4674
SP
129int
130perlsio_binmode(FILE *fp, int iotype, int mode)
131{
132 /*
133 * This used to be contents of do_binmode in doio.c
134 */
135#ifdef DOSISH
136# if defined(atarist) || defined(__MINT__)
137 if (!fflush(fp)) {
138 if (mode & O_BINARY)
139 ((FILE *) fp)->_flag |= _IOBIN;
140 else
141 ((FILE *) fp)->_flag &= ~_IOBIN;
142 return 1;
143 }
144 return 0;
145# else
146 dTHX;
147#ifdef NETWARE
148 if (PerlLIO_setmode(fp, mode) != -1) {
149#else
150 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
151#endif
152# if defined(WIN32) && defined(__BORLANDC__)
153 /*
154 * The translation mode of the stream is maintained independent
155of
156 * the translation mode of the fd in the Borland RTL (heavy
157 * digging through their runtime sources reveal). User has to
158set
159 * the mode explicitly for the stream (though they don't
160document
161 * this anywhere). GSAR 97-5-24
162 */
163 fseek(fp, 0L, 0);
164 if (mode & O_BINARY)
165 fp->flags |= _F_BIN;
166 else
167 fp->flags &= ~_F_BIN;
168# endif
169 return 1;
170 }
171 else
172 return 0;
173# endif
174#else
175# if defined(USEMYBINMODE)
176 dTHX;
177 if (my_binmode(fp, iotype, mode) != FALSE)
178 return 1;
179 else
180 return 0;
181# else
182 PERL_UNUSED_ARG(fp);
183 PERL_UNUSED_ARG(iotype);
184 PERL_UNUSED_ARG(mode);
185 return 1;
186# endif
187#endif
188}
189#endif /* sfio */
190
06c7082d 191#ifndef O_ACCMODE
22569500 192#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS
193#endif
194
195int
196PerlIO_intmode2str(int rawmode, char *mode, int *writing)
197{
de009b76 198 const int result = rawmode & O_ACCMODE;
06c7082d
NIS
199 int ix = 0;
200 int ptype;
201 switch (result) {
202 case O_RDONLY:
203 ptype = IoTYPE_RDONLY;
204 break;
205 case O_WRONLY:
206 ptype = IoTYPE_WRONLY;
207 break;
208 case O_RDWR:
209 default:
210 ptype = IoTYPE_RDWR;
211 break;
212 }
213 if (writing)
214 *writing = (result != O_RDONLY);
215
216 if (result == O_RDONLY) {
217 mode[ix++] = 'r';
218 }
219#ifdef O_APPEND
220 else if (rawmode & O_APPEND) {
221 mode[ix++] = 'a';
222 if (result != O_WRONLY)
223 mode[ix++] = '+';
224 }
225#endif
226 else {
227 if (result == O_WRONLY)
228 mode[ix++] = 'w';
229 else {
230 mode[ix++] = 'r';
231 mode[ix++] = '+';
232 }
233 }
234 if (rawmode & O_BINARY)
235 mode[ix++] = 'b';
236 mode[ix] = '\0';
237 return ptype;
238}
239
eb73beca
NIS
240#ifndef PERLIO_LAYERS
241int
242PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
243{
6874a2de
NIS
244 if (!names || !*names
245 || strEQ(names, ":crlf")
246 || strEQ(names, ":raw")
247 || strEQ(names, ":bytes")
248 ) {
14a5cf38
JH
249 return 0;
250 }
251 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
252 /*
71200d45 253 * NOTREACHED
14a5cf38
JH
254 */
255 return -1;
eb73beca
NIS
256}
257
13621cfb
NIS
258void
259PerlIO_destruct(pTHX)
260{
261}
262
f5b9d040
NIS
263int
264PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
265{
92bff44d 266#ifdef USE_SFIO
8772537c
AL
267 PERL_UNUSED_ARG(iotype);
268 PERL_UNUSED_ARG(mode);
269 PERL_UNUSED_ARG(names);
14a5cf38 270 return 1;
92bff44d 271#else
14a5cf38 272 return perlsio_binmode(fp, iotype, mode);
92bff44d 273#endif
f5b9d040 274}
60382766 275
e0fa5af2 276PerlIO *
ecdeb87c 277PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 278{
a0fd4948 279#if defined(PERL_MICRO) || defined(__SYMBIAN32__)
0553478e
NIS
280 return NULL;
281#else
282#ifdef PERL_IMPLICIT_SYS
22569500 283 return PerlSIO_fdupopen(f);
0553478e 284#else
30753f56
NIS
285#ifdef WIN32
286 return win32_fdupopen(f);
287#else
e0fa5af2 288 if (f) {
504618e9 289 const int fd = PerlLIO_dup(PerlIO_fileno(f));
e0fa5af2 290 if (fd >= 0) {
06c7082d 291 char mode[8];
a5936e02 292#ifdef DJGPP
dcda55fc
AL
293 const int omode = djgpp_get_stream_mode(f);
294#else
295 const int omode = fcntl(fd, F_GETFL);
a5936e02 296#endif
06c7082d 297 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 298 /* the r+ is a hack */
06c7082d 299 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS
300 }
301 return NULL;
302 }
303 else {
93189314 304 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 305 }
7114a2d2 306#endif
e0fa5af2 307 return NULL;
0553478e 308#endif
30753f56 309#endif
e0fa5af2
NIS
310}
311
312
14a5cf38 313/*
71200d45 314 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 315 */
ee518936
NIS
316
317PerlIO *
14a5cf38
JH
318PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
319 int imode, int perm, PerlIO *old, int narg, SV **args)
320{
7cf31beb
NIS
321 if (narg) {
322 if (narg > 1) {
3b8752bb 323 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 324 }
14a5cf38
JH
325 if (*args == &PL_sv_undef)
326 return PerlIO_tmpfile();
327 else {
e62f0680 328 const char *name = SvPV_nolen_const(*args);
3b6c1aba 329 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
330 fd = PerlLIO_open3(name, imode, perm);
331 if (fd >= 0)
de009b76 332 return PerlIO_fdopen(fd, mode + 1);
14a5cf38
JH
333 }
334 else if (old) {
335 return PerlIO_reopen(name, mode, old);
336 }
337 else {
338 return PerlIO_open(name, mode);
339 }
340 }
341 }
342 else {
343 return PerlIO_fdopen(fd, (char *) mode);
344 }
345 return NULL;
ee518936
NIS
346}
347
0c4f7ff0
NIS
348XS(XS_PerlIO__Layer__find)
349{
14a5cf38
JH
350 dXSARGS;
351 if (items < 2)
352 Perl_croak(aTHX_ "Usage class->find(name[,load])");
353 else {
dcda55fc 354 const char * const name = SvPV_nolen_const(ST(1));
14a5cf38
JH
355 ST(0) = (strEQ(name, "crlf")
356 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
357 XSRETURN(1);
358 }
0c4f7ff0
NIS
359}
360
361
362void
363Perl_boot_core_PerlIO(pTHX)
364{
14a5cf38 365 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS
366}
367
ac27b0f5
NIS
368#endif
369
32e30700 370
6f9d8c32 371#ifdef PERLIO_IS_STDIO
760ac839
LW
372
373void
e8632036 374PerlIO_init(pTHX)
760ac839 375{
96a5add6 376 PERL_UNUSED_CONTEXT;
14a5cf38
JH
377 /*
378 * Does nothing (yet) except force this file to be included in perl
71200d45 379 * binary. That allows this file to force inclusion of other functions
14a5cf38 380 * that may be required by loadable extensions e.g. for
71200d45 381 * FileHandle::tmpfile
14a5cf38 382 */
760ac839
LW
383}
384
33dcbb9a
PP
385#undef PerlIO_tmpfile
386PerlIO *
8ac85365 387PerlIO_tmpfile(void)
33dcbb9a 388{
14a5cf38 389 return tmpfile();
33dcbb9a
PP
390}
391
22569500 392#else /* PERLIO_IS_STDIO */
760ac839
LW
393
394#ifdef USE_SFIO
395
396#undef HAS_FSETPOS
397#undef HAS_FGETPOS
398
14a5cf38
JH
399/*
400 * This section is just to make sure these functions get pulled in from
71200d45 401 * libsfio.a
14a5cf38 402 */
760ac839
LW
403
404#undef PerlIO_tmpfile
405PerlIO *
c78749f2 406PerlIO_tmpfile(void)
760ac839 407{
14a5cf38 408 return sftmp(0);
760ac839
LW
409}
410
411void
e8632036 412PerlIO_init(pTHX)
760ac839 413{
96a5add6 414 PERL_UNUSED_CONTEXT;
14a5cf38
JH
415 /*
416 * Force this file to be included in perl binary. Which allows this
417 * file to force inclusion of other functions that may be required by
71200d45 418 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 419 */
760ac839 420
14a5cf38 421 /*
71200d45 422 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 423 * results in a lot of lseek()s to regular files and lot of small
71200d45 424 * writes to pipes.
14a5cf38
JH
425 */
426 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW
427}
428
b9d6bf13 429/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 430PerlIO *
4b069b44 431PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 432{
de009b76 433 const int fd = fileno(stdio);
4b069b44 434 if (!mode || !*mode) {
81428673 435 mode = "r+";
4b069b44
NIS
436 }
437 return PerlIO_fdopen(fd, mode);
92bff44d
NIS
438}
439
440FILE *
441PerlIO_findFILE(PerlIO *pio)
442{
de009b76
AL
443 const int fd = PerlIO_fileno(pio);
444 FILE * const f = fdopen(fd, "r+");
14a5cf38
JH
445 PerlIO_flush(pio);
446 if (!f && errno == EINVAL)
447 f = fdopen(fd, "w");
448 if (!f && errno == EINVAL)
449 f = fdopen(fd, "r");
450 return f;
92bff44d
NIS
451}
452
453
22569500 454#else /* USE_SFIO */
6f9d8c32 455/*======================================================================================*/
14a5cf38 456/*
71200d45 457 * Implement all the PerlIO interface ourselves.
9e353e3b 458 */
760ac839 459
76ced9ad
NIS
460#include "perliol.h"
461
14a5cf38
JH
462/*
463 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 464 * files
14a5cf38 465 */
02f66e2f
NIS
466#ifdef I_UNISTD
467#include <unistd.h>
468#endif
06da4f11
NIS
469#ifdef HAS_MMAP
470#include <sys/mman.h>
471#endif
472
6f9d8c32 473void
14a5cf38
JH
474PerlIO_debug(const char *fmt, ...)
475{
14a5cf38
JH
476 va_list ap;
477 dSYS;
478 va_start(ap, fmt);
582588d2
NC
479 if (!PL_perlio_debug_fd) {
480 if (!PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
481 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
482 if (s && *s)
483 PL_perlio_debug_fd
484 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
485 else
486 PL_perlio_debug_fd = -1;
487 } else {
488 /* tainting or set*id, so ignore the environment, and ensure we
489 skip these tests next time through. */
27da23d5 490 PL_perlio_debug_fd = -1;
582588d2 491 }
14a5cf38 492 }
27da23d5 493 if (PL_perlio_debug_fd > 0) {
14a5cf38 494 dTHX;
70ace5da 495#ifdef USE_ITHREADS
dcda55fc 496 const char * const s = CopFILE(PL_curcop);
70ace5da
NIS
497 /* Use fixed buffer as sv_catpvf etc. needs SVs */
498 char buffer[1024];
1208b3dd
JH
499 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
500 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
501 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
70ace5da 502#else
dcda55fc
AL
503 const char *s = CopFILE(PL_curcop);
504 STRLEN len;
396482e1 505 SV * const sv = newSVpvs("");
dcda55fc 506 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
14a5cf38
JH
507 (IV) CopLINE(PL_curcop));
508 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
509
b83604b4 510 s = SvPV_const(sv, len);
27da23d5 511 PerlLIO_write(PL_perlio_debug_fd, s, len);
14a5cf38 512 SvREFCNT_dec(sv);
70ace5da 513#endif
14a5cf38
JH
514 }
515 va_end(ap);
6f9d8c32
NIS
516}
517
9e353e3b
NIS
518/*--------------------------------------------------------------------------------------*/
519
14a5cf38 520/*
71200d45 521 * Inner level routines
14a5cf38 522 */
9e353e3b 523
14a5cf38 524/*
71200d45 525 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 526 */
05d1247b 527#define PERLIO_TABLE_SIZE 64
6f9d8c32 528
760ac839 529PerlIO *
5f1a76d0 530PerlIO_allocate(pTHX)
6f9d8c32 531{
97aff369 532 dVAR;
14a5cf38 533 /*
71200d45 534 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH
535 */
536 PerlIO **last;
537 PerlIO *f;
a1ea730d 538 last = &PL_perlio;
14a5cf38
JH
539 while ((f = *last)) {
540 int i;
541 last = (PerlIO **) (f);
542 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
543 if (!*++f) {
544 return f;
545 }
546 }
547 }
a02a5408 548 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH
549 if (!f) {
550 return NULL;
551 }
552 *last = f;
553 return f + 1;
05d1247b
NIS
554}
555
a1ea730d
NIS
556#undef PerlIO_fdupopen
557PerlIO *
ecdeb87c 558PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 559{
04892f78 560 if (PerlIOValid(f)) {
de009b76 561 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
fe5a182c 562 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
210e727c
JH
563 if (tab && tab->Dup)
564 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
37725cdc
NIS
565 else {
566 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
567 }
a1ea730d 568 }
210e727c
JH
569 else
570 SETERRNO(EBADF, SS_IVCHAN);
571
572 return NULL;
a1ea730d
NIS
573}
574
575void
5f1a76d0 576PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 577{
dcda55fc 578 PerlIO * const table = *tablep;
14a5cf38
JH
579 if (table) {
580 int i;
581 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
582 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
dcda55fc 583 PerlIO * const f = table + i;
14a5cf38
JH
584 if (*f) {
585 PerlIO_close(f);
586 }
587 }
3a1ee7e8 588 Safefree(table);
14a5cf38 589 *tablep = NULL;
05d1247b 590 }
05d1247b
NIS
591}
592
fcf2db38
NIS
593
594PerlIO_list_t *
3a1ee7e8 595PerlIO_list_alloc(pTHX)
fcf2db38 596{
14a5cf38 597 PerlIO_list_t *list;
96a5add6 598 PERL_UNUSED_CONTEXT;
a02a5408 599 Newxz(list, 1, PerlIO_list_t);
14a5cf38
JH
600 list->refcnt = 1;
601 return list;
fcf2db38
NIS
602}
603
604void
3a1ee7e8 605PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 606{
14a5cf38
JH
607 if (list) {
608 if (--list->refcnt == 0) {
609 if (list->array) {
14a5cf38
JH
610 IV i;
611 for (i = 0; i < list->cur; i++) {
612 if (list->array[i].arg)
613 SvREFCNT_dec(list->array[i].arg);
614 }
615 Safefree(list->array);
616 }
617 Safefree(list);
618 }
619 }
fcf2db38
NIS
620}
621
622void
3a1ee7e8 623PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 624{
97aff369 625 dVAR;
334e202e 626 PerlIO_pair_t *p;
b37c2d43
AL
627 PERL_UNUSED_CONTEXT;
628
14a5cf38
JH
629 if (list->cur >= list->len) {
630 list->len += 8;
631 if (list->array)
632 Renew(list->array, list->len, PerlIO_pair_t);
633 else
a02a5408 634 Newx(list->array, list->len, PerlIO_pair_t);
14a5cf38
JH
635 }
636 p = &(list->array[list->cur++]);
637 p->funcs = funcs;
638 if ((p->arg = arg)) {
f84c484e 639 SvREFCNT_inc_simple_void_NN(arg);
14a5cf38 640 }
fcf2db38
NIS
641}
642
3a1ee7e8
NIS
643PerlIO_list_t *
644PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
645{
b37c2d43 646 PerlIO_list_t *list = NULL;
694c95cf
JH
647 if (proto) {
648 int i;
649 list = PerlIO_list_alloc(aTHX);
650 for (i=0; i < proto->cur; i++) {
a951d81d
BL
651 SV *arg = proto->array[i].arg;
652#ifdef sv_dup
653 if (arg && param)
654 arg = sv_dup(arg, param);
655#else
656 PERL_UNUSED_ARG(param);
657#endif
694c95cf
JH
658 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
659 }
3a1ee7e8
NIS
660 }
661 return list;
662}
4a4a6116 663
05d1247b 664void
3a1ee7e8 665PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 666{
3aaf42a7 667#ifdef USE_ITHREADS
3a1ee7e8
NIS
668 PerlIO **table = &proto->Iperlio;
669 PerlIO *f;
670 PL_perlio = NULL;
671 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
672 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
673 PerlIO_allocate(aTHX); /* root slot is never used */
a25429c6 674 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
3a1ee7e8
NIS
675 while ((f = *table)) {
676 int i;
677 table = (PerlIO **) (f++);
678 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
679 if (*f) {
93a8090d 680 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
681 }
682 f++;
683 }
684 }
1b6737cc 685#else
a25429c6 686 PERL_UNUSED_CONTEXT;
1b6737cc
AL
687 PERL_UNUSED_ARG(proto);
688 PERL_UNUSED_ARG(param);
3aaf42a7 689#endif
9a6404c5
DM
690}
691
692void
13621cfb
NIS
693PerlIO_destruct(pTHX)
694{
97aff369 695 dVAR;
a1ea730d 696 PerlIO **table = &PL_perlio;
14a5cf38 697 PerlIO *f;
694c95cf 698#ifdef USE_ITHREADS
a25429c6 699 PerlIO_debug("Destruct %p\n",(void*)aTHX);
694c95cf 700#endif
14a5cf38
JH
701 while ((f = *table)) {
702 int i;
703 table = (PerlIO **) (f++);
704 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
705 PerlIO *x = f;
dcda55fc 706 const PerlIOl *l;
14a5cf38
JH
707 while ((l = *x)) {
708 if (l->tab->kind & PERLIO_K_DESTRUCT) {
709 PerlIO_debug("Destruct popping %s\n", l->tab->name);
710 PerlIO_flush(x);
711 PerlIO_pop(aTHX_ x);
712 }
713 else {
714 x = PerlIONext(x);
715 }
716 }
717 f++;
718 }
719 }
13621cfb
NIS
720}
721
722void
a999f61b 723PerlIO_pop(pTHX_ PerlIO *f)
760ac839 724{
dcda55fc 725 const PerlIOl *l = *f;
14a5cf38 726 if (l) {
fe5a182c 727 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
728 if (l->tab->Popped) {
729 /*
730 * If popped returns non-zero do not free its layer structure
731 * it has either done so itself, or it is shared and still in
71200d45 732 * use
14a5cf38 733 */
f62ce20a 734 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
735 return;
736 }
b47cad08 737 *f = l->next;
3a1ee7e8 738 Safefree(l);
a8c08ecd 739 }
6f9d8c32
NIS
740}
741
39f7a870
JH
742/* Return as an array the stack of layers on a filehandle. Note that
743 * the stack is returned top-first in the array, and there are three
744 * times as many array elements as there are layers in the stack: the
745 * first element of a layer triplet is the name, the second one is the
746 * arguments, and the third one is the flags. */
747
748AV *
749PerlIO_get_layers(pTHX_ PerlIO *f)
750{
97aff369 751 dVAR;
dcda55fc 752 AV * const av = newAV();
39f7a870 753
dcda55fc
AL
754 if (PerlIOValid(f)) {
755 PerlIOl *l = PerlIOBase(f);
756
757 while (l) {
758 SV * const name = l->tab && l->tab->name ?
759 newSVpv(l->tab->name, 0) : &PL_sv_undef;
760 SV * const arg = l->tab && l->tab->Getarg ?
761 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
762 av_push(av, name);
763 av_push(av, arg);
764 av_push(av, newSViv((IV)l->flags));
765 l = l->next;
766 }
767 }
39f7a870 768
dcda55fc 769 return av;
39f7a870
JH
770}
771
9e353e3b 772/*--------------------------------------------------------------------------------------*/
14a5cf38 773/*
71200d45 774 * XS Interface for perl code
14a5cf38 775 */
9e353e3b 776
fcf2db38 777PerlIO_funcs *
2edd7e44 778PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 779{
27da23d5 780 dVAR;
14a5cf38
JH
781 IV i;
782 if ((SSize_t) len <= 0)
783 len = strlen(name);
3a1ee7e8 784 for (i = 0; i < PL_known_layers->cur; i++) {
46c461b5 785 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
a9f76400 786 if (memEQ(f->name, name, len) && f->name[len] == 0) {
fe5a182c 787 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
788 return f;
789 }
790 }
3a1ee7e8
NIS
791 if (load && PL_subname && PL_def_layerlist
792 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
793 if (PL_in_load_module) {
794 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
795 return NULL;
796 } else {
396482e1 797 SV * const pkgsv = newSVpvs("PerlIO");
46c461b5 798 SV * const layer = newSVpvn(name, len);
780a5241 799 CV * const cv = Perl_get_cvn_flags(aTHX_ STR_WITH_LEN("PerlIO::Layer::NoWarnings"), 0);
46c461b5 800 ENTER;
d7a09b41 801 SAVEINT(PL_in_load_module);
c9bca74a 802 if (cv) {
9cfa90c0 803 SAVEGENERICSV(PL_warnhook);
b37c2d43 804 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
c9bca74a 805 }
d7a09b41
SR
806 PL_in_load_module++;
807 /*
808 * The two SVs are magically freed by load_module
809 */
a0714e2c 810 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
d7a09b41
SR
811 PL_in_load_module--;
812 LEAVE;
813 return PerlIO_find_layer(aTHX_ name, len, 0);
814 }
14a5cf38
JH
815 }
816 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
817 return NULL;
f3862f8b
NIS
818}
819
2a1bc955 820#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
821
822static int
823perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
824{
14a5cf38 825 if (SvROK(sv)) {
dcda55fc
AL
826 IO * const io = GvIOn((GV *) SvRV(sv));
827 PerlIO * const ifp = IoIFP(io);
828 PerlIO * const ofp = IoOFP(io);
be2597df
MHM
829 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
830 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
14a5cf38
JH
831 }
832 return 0;
b13b2135
NIS
833}
834
835static int
836perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
837{
14a5cf38 838 if (SvROK(sv)) {
dcda55fc
AL
839 IO * const io = GvIOn((GV *) SvRV(sv));
840 PerlIO * const ifp = IoIFP(io);
841 PerlIO * const ofp = IoOFP(io);
be2597df
MHM
842 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
843 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
14a5cf38
JH
844 }
845 return 0;
b13b2135
NIS
846}
847
848static int
849perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
850{
be2597df 851 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
14a5cf38 852 return 0;
b13b2135
NIS
853}
854
855static int
856perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
857{
be2597df 858 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
14a5cf38 859 return 0;
b13b2135
NIS
860}
861
862MGVTBL perlio_vtab = {
14a5cf38
JH
863 perlio_mg_get,
864 perlio_mg_set,
22569500 865 NULL, /* len */
14a5cf38
JH
866 perlio_mg_clear,
867 perlio_mg_free
b13b2135
NIS
868};
869
870XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
871{
14a5cf38 872 dXSARGS;
dcda55fc
AL
873 SV * const sv = SvRV(ST(1));
874 AV * const av = newAV();
14a5cf38
JH
875 MAGIC *mg;
876 int count = 0;
877 int i;
878 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
879 SvRMAGICAL_off(sv);
880 mg = mg_find(sv, PERL_MAGIC_ext);
881 mg->mg_virtual = &perlio_vtab;
882 mg_magical(sv);
be2597df 883 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
14a5cf38
JH
884 for (i = 2; i < items; i++) {
885 STRLEN len;
dcda55fc
AL
886 const char * const name = SvPV_const(ST(i), len);
887 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
14a5cf38 888 if (layer) {
b37c2d43 889 av_push(av, SvREFCNT_inc_simple_NN(layer));
14a5cf38
JH
890 }
891 else {
892 ST(count) = ST(i);
893 count++;
894 }
895 }
896 SvREFCNT_dec(av);
897 XSRETURN(count);
898}
899
22569500 900#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 901
e3f3bf95
NIS
902SV *
903PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 904{
da51bb9b 905 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
46c461b5 906 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
14a5cf38 907 return sv;
e3f3bf95
NIS
908}
909
5ca1d77f 910XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 911{
37725cdc 912 /* This is used as a %SIG{__WARN__} handler to supress warnings
c9bca74a
NIS
913 during loading of layers.
914 */
97aff369 915 dVAR;
c9bca74a
NIS
916 dXSARGS;
917 if (items)
e62f0680 918 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
c9bca74a
NIS
919 XSRETURN(0);
920}
921
5ca1d77f 922XS(XS_PerlIO__Layer__find)
0c4f7ff0 923{
97aff369 924 dVAR;
14a5cf38
JH
925 dXSARGS;
926 if (items < 2)
927 Perl_croak(aTHX_ "Usage class->find(name[,load])");
928 else {
de009b76 929 STRLEN len;
46c461b5 930 const char * const name = SvPV_const(ST(1), len);
de009b76 931 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
46c461b5 932 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
14a5cf38
JH
933 ST(0) =
934 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
935 &PL_sv_undef;
936 XSRETURN(1);
937 }
0c4f7ff0
NIS
938}
939
e3f3bf95
NIS
940void
941PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
942{
97aff369 943 dVAR;
3a1ee7e8
NIS
944 if (!PL_known_layers)
945 PL_known_layers = PerlIO_list_alloc(aTHX);
a0714e2c 946 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
fe5a182c 947 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
948}
949
1141d9f8 950int
fcf2db38 951PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 952{
97aff369 953 dVAR;
14a5cf38
JH
954 if (names) {
955 const char *s = names;
956 while (*s) {
957 while (isSPACE(*s) || *s == ':')
958 s++;
959 if (*s) {
960 STRLEN llen = 0;
961 const char *e = s;
bd61b366 962 const char *as = NULL;
14a5cf38
JH
963 STRLEN alen = 0;
964 if (!isIDFIRST(*s)) {
965 /*
966 * Message is consistent with how attribute lists are
967 * passed. Even though this means "foo : : bar" is
71200d45 968 * seen as an invalid separator character.
14a5cf38 969 */
de009b76 970 const char q = ((*s == '\'') ? '"' : '\'');
99ef548b 971 if (ckWARN(WARN_LAYER))
22569500 972 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 973 "Invalid separator character %c%c%c in PerlIO layer specification %s",
1e616cf5 974 q, *s, q, s);
93189314 975 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
976 return -1;
977 }
978 do {
979 e++;
980 } while (isALNUM(*e));
981 llen = e - s;
982 if (*e == '(') {
983 int nesting = 1;
984 as = ++e;
985 while (nesting) {
986 switch (*e++) {
987 case ')':
988 if (--nesting == 0)
989 alen = (e - 1) - as;
990 break;
991 case '(':
992 ++nesting;
993 break;
994 case '\\':
995 /*
996 * It's a nul terminated string, not allowed
997 * to \ the terminating null. Anything other
71200d45 998 * character is passed over.
14a5cf38
JH
999 */
1000 if (*e++) {
1001 break;
1002 }
1003 /*
71200d45 1004 * Drop through
14a5cf38
JH
1005 */
1006 case '\0':
1007 e--;
22569500
NIS
1008 if (ckWARN(WARN_LAYER))
1009 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 1010 "Argument list not closed for PerlIO layer \"%.*s\"",
14a5cf38
JH
1011 (int) (e - s), s);
1012 return -1;
1013 default:
1014 /*
71200d45 1015 * boring.
14a5cf38
JH
1016 */
1017 break;
1018 }
1019 }
1020 }
1021 if (e > s) {
46c461b5 1022 PerlIO_funcs * const layer =
14a5cf38
JH
1023 PerlIO_find_layer(aTHX_ s, llen, 1);
1024 if (layer) {
a951d81d
BL
1025 SV *arg = NULL;
1026 if (as)
1027 arg = newSVpvn(as, alen);
3a1ee7e8 1028 PerlIO_list_push(aTHX_ av, layer,
a951d81d
BL
1029 (arg) ? arg : &PL_sv_undef);
1030 if (arg)
1031 SvREFCNT_dec(arg);
14a5cf38
JH
1032 }
1033 else {
041457d9 1034 if (ckWARN(WARN_LAYER))
b4581f09 1035 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
14a5cf38
JH
1036 (int) llen, s);
1037 return -1;
1038 }
1039 }
1040 s = e;
1041 }
1042 }
1043 }
1044 return 0;
1141d9f8
NIS
1045}
1046
dfebf958 1047void
fcf2db38 1048PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 1049{
97aff369 1050 dVAR;
27da23d5 1051 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 1052#ifdef PERLIO_USING_CRLF
6ce75a77 1053 tab = &PerlIO_crlf;
846be114 1054#else
6ce75a77 1055 if (PerlIO_stdio.Set_ptrcnt)
22569500 1056 tab = &PerlIO_stdio;
846be114 1057#endif
14a5cf38 1058 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 1059 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 1060 &PL_sv_undef);
dfebf958
NIS
1061}
1062
e3f3bf95 1063SV *
14a5cf38 1064PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 1065{
14a5cf38 1066 return av->array[n].arg;
e3f3bf95
NIS
1067}
1068
f3862f8b 1069PerlIO_funcs *
14a5cf38 1070PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1071{
14a5cf38
JH
1072 if (n >= 0 && n < av->cur) {
1073 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1074 av->array[n].funcs->name);
1075 return av->array[n].funcs;
1076 }
1077 if (!def)
1078 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1079 return def;
e3f3bf95
NIS
1080}
1081
4ec2216f
NIS
1082IV
1083PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1084{
8772537c
AL
1085 PERL_UNUSED_ARG(mode);
1086 PERL_UNUSED_ARG(arg);
1087 PERL_UNUSED_ARG(tab);
4ec2216f
NIS
1088 if (PerlIOValid(f)) {
1089 PerlIO_flush(f);
1090 PerlIO_pop(aTHX_ f);
1091 return 0;
1092 }
1093 return -1;
1094}
1095
27da23d5 1096PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS
1097 sizeof(PerlIO_funcs),
1098 "pop",
1099 0,
1100 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1101 PerlIOPop_pushed,
1102 NULL,
1103 NULL,
1104 NULL,
1105 NULL,
1106 NULL,
1107 NULL,
1108 NULL,
1109 NULL,
1110 NULL,
1111 NULL,
de009b76
AL
1112 NULL,
1113 NULL,
4ec2216f
NIS
1114 NULL, /* flush */
1115 NULL, /* fill */
1116 NULL,
1117 NULL,
1118 NULL,
1119 NULL,
1120 NULL, /* get_base */
1121 NULL, /* get_bufsiz */
1122 NULL, /* get_ptr */
1123 NULL, /* get_cnt */
1124 NULL, /* set_ptrcnt */
1125};
1126
fcf2db38 1127PerlIO_list_t *
e3f3bf95
NIS
1128PerlIO_default_layers(pTHX)
1129{
97aff369 1130 dVAR;
3a1ee7e8 1131 if (!PL_def_layerlist) {
bd61b366 1132 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
27da23d5 1133 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1134 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1135 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1136#if defined(WIN32)
27da23d5 1137 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1138#if 0
14a5cf38 1139 osLayer = &PerlIO_win32;
0c4128ad 1140#endif
2f8118af 1141#endif
27da23d5
JH
1142 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1143 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1144 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1145 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
06da4f11 1146#ifdef HAS_MMAP
27da23d5 1147 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
06da4f11 1148#endif
27da23d5
JH
1149 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1150 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1151 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
3a1ee7e8 1152 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1153 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1154 &PL_sv_undef);
1155 if (s) {
3a1ee7e8 1156 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1157 }
1158 else {
3a1ee7e8 1159 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1160 }
1141d9f8 1161 }
3a1ee7e8
NIS
1162 if (PL_def_layerlist->cur < 2) {
1163 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1164 }
3a1ee7e8 1165 return PL_def_layerlist;
e3f3bf95
NIS
1166}
1167
0c4f7ff0
NIS
1168void
1169Perl_boot_core_PerlIO(pTHX)
1170{
1171#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1172 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1173 __FILE__);
0c4f7ff0 1174#endif
14a5cf38 1175 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1176 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1177}
e3f3bf95
NIS
1178
1179PerlIO_funcs *
1180PerlIO_default_layer(pTHX_ I32 n)
1181{
97aff369 1182 dVAR;
46c461b5 1183 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
14a5cf38
JH
1184 if (n < 0)
1185 n += av->cur;
27da23d5 1186 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS
1187}
1188
a999f61b
NIS
1189#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1190#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1191
1192void
1141d9f8 1193PerlIO_stdstreams(pTHX)
60382766 1194{
97aff369 1195 dVAR;
a1ea730d 1196 if (!PL_perlio) {
14a5cf38
JH
1197 PerlIO_allocate(aTHX);
1198 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1199 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1200 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1201 }
60382766
NIS
1202}
1203
1204PerlIO *
27da23d5 1205PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1206{
2dc2558e
NIS
1207 if (tab->fsize != sizeof(PerlIO_funcs)) {
1208 mismatch:
1209 Perl_croak(aTHX_ "Layer does not match this perl");
1210 }
1211 if (tab->size) {
b464bac0 1212 PerlIOl *l;
2dc2558e
NIS
1213 if (tab->size < sizeof(PerlIOl)) {
1214 goto mismatch;
1215 }
1216 /* Real layer with a data area */
002e75cf
JH
1217 if (f) {
1218 char *temp;
1219 Newxz(temp, tab->size, char);
1220 l = (PerlIOl*)temp;
1221 if (l) {
1222 l->next = *f;
1223 l->tab = (PerlIO_funcs*) tab;
1224 *f = l;
1225 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1226 (void*)f, tab->name,
1227 (mode) ? mode : "(Null)", (void*)arg);
1228 if (*l->tab->Pushed &&
1229 (*l->tab->Pushed)
1230 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1231 PerlIO_pop(aTHX_ f);
1232 return NULL;
1233 }
2dc2558e 1234 }
002e75cf
JH
1235 else
1236 return NULL;
2dc2558e
NIS
1237 }
1238 }
1239 else if (f) {
1240 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1241 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1242 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1243 if (tab->Pushed &&
27da23d5 1244 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1245 return NULL;
14a5cf38
JH
1246 }
1247 }
1248 return f;
60382766
NIS
1249}
1250
dfebf958 1251IV
86e05cf2
NIS
1252PerlIOBase_binmode(pTHX_ PerlIO *f)
1253{
1254 if (PerlIOValid(f)) {
1255 /* Is layer suitable for raw stream ? */
1256 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1257 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1258 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1259 }
1260 else {
1261 /* Not suitable - pop it */
1262 PerlIO_pop(aTHX_ f);
1263 }
1264 return 0;
1265 }
1266 return -1;
1267}
1268
1269IV
2dc2558e 1270PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1271{
8772537c
AL
1272 PERL_UNUSED_ARG(mode);
1273 PERL_UNUSED_ARG(arg);
1274 PERL_UNUSED_ARG(tab);
86e05cf2 1275
04892f78 1276 if (PerlIOValid(f)) {
86e05cf2 1277 PerlIO *t;
de009b76 1278 const PerlIOl *l;
14a5cf38 1279 PerlIO_flush(f);
86e05cf2
NIS
1280 /*
1281 * Strip all layers that are not suitable for a raw stream
1282 */
1283 t = f;
1284 while (t && (l = *t)) {
1285 if (l->tab->Binmode) {
1286 /* Has a handler - normal case */
1287 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1288 if (*t == l) {
1289 /* Layer still there - move down a layer */
1290 t = PerlIONext(t);
1291 }
1292 }
1293 else {
1294 return -1;
1295 }
14a5cf38
JH
1296 }
1297 else {
86e05cf2
NIS
1298 /* No handler - pop it */
1299 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1300 }
1301 }
86e05cf2
NIS
1302 if (PerlIOValid(f)) {
1303 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1304 return 0;
1305 }
14a5cf38
JH
1306 }
1307 return -1;
dfebf958
NIS
1308}
1309
ac27b0f5 1310int
14a5cf38 1311PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1312 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1313{
14a5cf38
JH
1314 int code = 0;
1315 while (n < max) {
8772537c 1316 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
14a5cf38
JH
1317 if (tab) {
1318 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1319 code = -1;
1320 break;
1321 }
1322 }
1323 n++;
1324 }
1325 return code;
e3f3bf95
NIS
1326}
1327
1328int
ac27b0f5
NIS
1329PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1330{
14a5cf38 1331 int code = 0;
53f1b6d2 1332 if (f && names) {
8772537c 1333 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1334 code = PerlIO_parse_layers(aTHX_ layers, names);
1335 if (code == 0) {
d9dac8cd 1336 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1337 }
3a1ee7e8 1338 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1339 }
14a5cf38 1340 return code;
ac27b0f5
NIS
1341}
1342
f3862f8b 1343
60382766 1344/*--------------------------------------------------------------------------------------*/
14a5cf38 1345/*
71200d45 1346 * Given the abstraction above the public API functions
14a5cf38 1347 */
60382766
NIS
1348
1349int
f5b9d040 1350PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1351{
68b5363f
PD
1352 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1353 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1354 iotype, mode, (names) ? names : "(Null)");
1355
03c0554d
NIS
1356 if (names) {
1357 /* Do not flush etc. if (e.g.) switching encodings.
1358 if a pushed layer knows it needs to flush lower layers
1359 (for example :unix which is never going to call them)
1360 it can do the flush when it is pushed.
1361 */
1362 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1363 }
1364 else {
86e05cf2 1365 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1366#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1367 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1368 O_BINARY so we can look for it in mode.
1369 */
1370 if (!(mode & O_BINARY)) {
1371 /* Text mode */
86e05cf2
NIS
1372 /* FIXME?: Looking down the layer stack seems wrong,
1373 but is a way of reaching past (say) an encoding layer
1374 to flip CRLF-ness of the layer(s) below
1375 */
03c0554d
NIS
1376 while (*f) {
1377 /* Perhaps we should turn on bottom-most aware layer
1378 e.g. Ilya's idea that UNIX TTY could serve
1379 */
1380 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1381 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1382 /* Not in text mode - flush any pending stuff and flip it */
1383 PerlIO_flush(f);
1384 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1385 }
1386 /* Only need to turn it on in one layer so we are done */
1387 return TRUE;
ed53a2bb 1388 }
03c0554d 1389 f = PerlIONext(f);
14a5cf38 1390 }
03c0554d
NIS
1391 /* Not finding a CRLF aware layer presumably means we are binary
1392 which is not what was requested - so we failed
1393 We _could_ push :crlf layer but so could caller
1394 */
1395 return FALSE;
14a5cf38 1396 }
6ce75a77 1397#endif
86e05cf2
NIS
1398 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1399 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1400 */
a0714e2c 1401 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
14a5cf38 1402 }
f5b9d040
NIS
1403}
1404
f5b9d040 1405int
e87a358a 1406PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1407{
37725cdc 1408 if (PerlIOValid(f)) {
46c461b5 1409 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
37725cdc
NIS
1410 if (tab && tab->Close)
1411 return (*tab->Close)(aTHX_ f);
1412 else
1413 return PerlIOBase_close(aTHX_ f);
1414 }
14a5cf38 1415 else {
93189314 1416 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1417 return -1;
1418 }
76ced9ad
NIS
1419}
1420
b931b1d9 1421int
e87a358a 1422Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1423{
de009b76 1424 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS
1425 while (PerlIOValid(f)) {
1426 PerlIO_pop(aTHX_ f);
f6c77cf1 1427 }
14a5cf38 1428 return code;
b931b1d9
NIS
1429}
1430
b931b1d9 1431int
e87a358a 1432Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1433{
97aff369 1434 dVAR;
b32dd47e 1435 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS
1436}
1437
1141d9f8 1438
fcf2db38 1439static PerlIO_funcs *
2edd7e44
NIS
1440PerlIO_layer_from_ref(pTHX_ SV *sv)
1441{
97aff369 1442 dVAR;
14a5cf38 1443 /*
71200d45 1444 * For any scalar type load the handler which is bundled with perl
14a5cf38 1445 */
75208dda
RGS
1446 if (SvTYPE(sv) < SVt_PVAV) {
1447 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1448 /* This isn't supposed to happen, since PerlIO::scalar is core,
1449 * but could happen anyway in smaller installs or with PAR */
1450 if (!f && ckWARN(WARN_LAYER))
1451 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1452 return f;
1453 }
14a5cf38
JH
1454
1455 /*
71200d45 1456 * For other types allow if layer is known but don't try and load it
14a5cf38
JH
1457 */
1458 switch (SvTYPE(sv)) {
1459 case SVt_PVAV:
6a245ed1 1460 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
14a5cf38 1461 case SVt_PVHV:
6a245ed1 1462 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
14a5cf38 1463 case SVt_PVCV:
6a245ed1 1464 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
14a5cf38 1465 case SVt_PVGV:
6a245ed1 1466 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
42d0e0b7
AL
1467 default:
1468 return NULL;
14a5cf38 1469 }
2edd7e44
NIS
1470}
1471
fcf2db38 1472PerlIO_list_t *
14a5cf38
JH
1473PerlIO_resolve_layers(pTHX_ const char *layers,
1474 const char *mode, int narg, SV **args)
1475{
97aff369 1476 dVAR;
14a5cf38
JH
1477 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1478 int incdef = 1;
a1ea730d 1479 if (!PL_perlio)
14a5cf38
JH
1480 PerlIO_stdstreams(aTHX);
1481 if (narg) {
dcda55fc 1482 SV * const arg = *args;
14a5cf38 1483 /*
71200d45
NIS
1484 * If it is a reference but not an object see if we have a handler
1485 * for it
14a5cf38
JH
1486 */
1487 if (SvROK(arg) && !sv_isobject(arg)) {
46c461b5 1488 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
14a5cf38 1489 if (handler) {
3a1ee7e8
NIS
1490 def = PerlIO_list_alloc(aTHX);
1491 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1492 incdef = 0;
1493 }
1494 /*
e934609f 1495 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1496 * something sensible else we will just stringfy and open
71200d45 1497 * resulting string.
14a5cf38
JH
1498 */
1499 }
1500 }
9fe371da 1501 if (!layers || !*layers)
11bcd5da 1502 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH
1503 if (layers && *layers) {
1504 PerlIO_list_t *av;
1505 if (incdef) {
a951d81d 1506 av = PerlIO_clone_list(aTHX_ def, NULL);
14a5cf38
JH
1507 }
1508 else {
1509 av = def;
1510 }
0cff2cf3
NIS
1511 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1512 return av;
1513 }
1514 else {
1515 PerlIO_list_free(aTHX_ av);
b37c2d43 1516 return NULL;
0cff2cf3 1517 }
14a5cf38
JH
1518 }
1519 else {
1520 if (incdef)
1521 def->refcnt++;
1522 return def;
1523 }
ee518936
NIS
1524}
1525
1526PerlIO *
14a5cf38
JH
1527PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1528 int imode, int perm, PerlIO *f, int narg, SV **args)
1529{
97aff369 1530 dVAR;
14a5cf38
JH
1531 if (!f && narg == 1 && *args == &PL_sv_undef) {
1532 if ((f = PerlIO_tmpfile())) {
9fe371da 1533 if (!layers || !*layers)
11bcd5da 1534 layers = Perl_PerlIO_context_layers(aTHX_ mode);
14a5cf38
JH
1535 if (layers && *layers)
1536 PerlIO_apply_layers(aTHX_ f, mode, layers);
1537 }
1538 }
1539 else {
de009b76 1540 PerlIO_list_t *layera;
14a5cf38
JH
1541 IV n;
1542 PerlIO_funcs *tab = NULL;
04892f78 1543 if (PerlIOValid(f)) {
14a5cf38 1544 /*
71200d45
NIS
1545 * This is "reopen" - it is not tested as perl does not use it
1546 * yet
14a5cf38
JH
1547 */
1548 PerlIOl *l = *f;
3a1ee7e8 1549 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1550 while (l) {
a951d81d
BL
1551 SV *arg = NULL;
1552 if (l->tab->Getarg)
1553 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1554 PerlIO_list_push(aTHX_ layera, l->tab,
1555 (arg) ? arg : &PL_sv_undef);
1556 if (arg)
1557 SvREFCNT_dec(arg);
14a5cf38
JH
1558 l = *PerlIONext(&l);
1559 }
1560 }
1561 else {
1562 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS
1563 if (!layera) {
1564 return NULL;
1565 }
14a5cf38
JH
1566 }
1567 /*
71200d45 1568 * Start at "top" of layer stack
14a5cf38
JH
1569 */
1570 n = layera->cur - 1;
1571 while (n >= 0) {
46c461b5 1572 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
14a5cf38
JH
1573 if (t && t->Open) {
1574 tab = t;
1575 break;
1576 }
1577 n--;
1578 }
1579 if (tab) {
1580 /*
71200d45 1581 * Found that layer 'n' can do opens - call it
14a5cf38 1582 */
7cf31beb 1583 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1584 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1585 }
14a5cf38 1586 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
355d3743
PD
1587 tab->name, layers ? layers : "(Null)", mode, fd,
1588 imode, perm, (void*)f, narg, (void*)args);
210e727c
JH
1589 if (tab->Open)
1590 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1591 f, narg, args);
1592 else {
1593 SETERRNO(EINVAL, LIB_INVARG);
1594 f = NULL;
1595 }
14a5cf38
JH
1596 if (f) {
1597 if (n + 1 < layera->cur) {
1598 /*
1599 * More layers above the one that we used to open -
71200d45 1600 * apply them now
14a5cf38 1601 */
d9dac8cd
NIS
1602 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1603 /* If pushing layers fails close the file */
1604 PerlIO_close(f);
14a5cf38
JH
1605 f = NULL;
1606 }
1607 }
1608 }
1609 }
3a1ee7e8 1610 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH
1611 }
1612 return f;
ee518936 1613}
b931b1d9
NIS
1614
1615
9e353e3b 1616SSize_t
e87a358a 1617Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1618{
b32dd47e 1619 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1620}
1621
313ca112 1622SSize_t
e87a358a 1623Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1624{
b32dd47e 1625 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1626}
1627
9e353e3b 1628SSize_t
e87a358a 1629Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1630{
b32dd47e 1631 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1632}
1633
6f9d8c32 1634int
e87a358a 1635Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1636{
b32dd47e 1637 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW
1638}
1639
9e353e3b 1640Off_t
e87a358a 1641Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1642{
b32dd47e 1643 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW
1644}
1645
6f9d8c32 1646int
e87a358a 1647Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1648{
97aff369 1649 dVAR;
14a5cf38
JH
1650 if (f) {
1651 if (*f) {
de009b76 1652 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1653
1654 if (tab && tab->Flush)
f62ce20a 1655 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH
1656 else
1657 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH
1658 }
1659 else {
fe5a182c 1660 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1661 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1662 return -1;
1663 }
1664 }
1665 else {
1666 /*
1667 * Is it good API design to do flush-all on NULL, a potentially
1668 * errorneous input? Maybe some magical value (PerlIO*
1669 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1670 * things on fflush(NULL), but should we be bound by their design
71200d45 1671 * decisions? --jhi
14a5cf38 1672 */
a1ea730d 1673 PerlIO **table = &PL_perlio;
14a5cf38
JH
1674 int code = 0;
1675 while ((f = *table)) {
1676 int i;
1677 table = (PerlIO **) (f++);
1678 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1679 if (*f && PerlIO_flush(f) != 0)
1680 code = -1;
1681 f++;
1682 }
1683 }
1684 return code;
1685 }
760ac839
LW
1686}
1687
a9c883f6 1688void
f62ce20a 1689PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1690{
97aff369 1691 dVAR;
a1ea730d 1692 PerlIO **table = &PL_perlio;
14a5cf38
JH
1693 PerlIO *f;
1694 while ((f = *table)) {
1695 int i;
1696 table = (PerlIO **) (f++);
1697 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1698 if (*f
1699 && (PerlIOBase(f)->
1700 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1701 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1702 PerlIO_flush(f);
1703 f++;
1704 }
a9c883f6 1705 }
a9c883f6
NIS
1706}
1707
06da4f11 1708int
e87a358a 1709Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1710{
b32dd47e 1711 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS
1712}
1713
f3862f8b
NIS
1714int
1715PerlIO_isutf8(PerlIO *f)
1716{
1b7a0411
JH
1717 if (PerlIOValid(f))
1718 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1719 else
1720 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1721
1b7a0411 1722 return -1;
f3862f8b
NIS
1723}
1724
6f9d8c32 1725int
e87a358a 1726Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1727{
b32dd47e 1728 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS
1729}
1730
9e353e3b 1731int
e87a358a 1732Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1733{
b32dd47e 1734 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS
1735}
1736
9e353e3b 1737void
e87a358a 1738Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1739{
b32dd47e 1740 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS
1741}
1742
9e353e3b 1743void
e87a358a 1744Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1745{
b32dd47e 1746 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS
1747}
1748
9e353e3b
NIS
1749int
1750PerlIO_has_base(PerlIO *f)
1751{
1b7a0411 1752 if (PerlIOValid(f)) {
46c461b5 1753 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1754
1755 if (tab)
1756 return (tab->Get_base != NULL);
1757 SETERRNO(EINVAL, LIB_INVARG);
1758 }
1759 else
1760 SETERRNO(EBADF, SS_IVCHAN);
1761
1762 return 0;
760ac839
LW
1763}
1764
9e353e3b
NIS
1765int
1766PerlIO_fast_gets(PerlIO *f)
760ac839 1767{
04892f78 1768 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
46c461b5 1769 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1770
1771 if (tab)
1772 return (tab->Set_ptrcnt != NULL);
1773 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1774 }
1b7a0411
JH
1775 else
1776 SETERRNO(EBADF, SS_IVCHAN);
1777
14a5cf38 1778 return 0;
9e353e3b
NIS
1779}
1780
9e353e3b
NIS
1781int
1782PerlIO_has_cntptr(PerlIO *f)
1783{
04892f78 1784 if (PerlIOValid(f)) {
46c461b5 1785 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1786
1787 if (tab)
1788 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1789 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1790 }
1b7a0411
JH
1791 else
1792 SETERRNO(EBADF, SS_IVCHAN);
1793
14a5cf38 1794 return 0;
9e353e3b
NIS
1795}
1796
9e353e3b
NIS
1797int
1798PerlIO_canset_cnt(PerlIO *f)
1799{
04892f78 1800 if (PerlIOValid(f)) {
46c461b5 1801 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1802
1803 if (tab)
1804 return (tab->Set_ptrcnt != NULL);
1805 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1806 }
1b7a0411
JH
1807 else
1808 SETERRNO(EBADF, SS_IVCHAN);
1809
14a5cf38 1810 return 0;
760ac839
LW
1811}
1812
888911fc 1813STDCHAR *
e87a358a 1814Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1815{
b32dd47e 1816 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS
1817}
1818
9e353e3b 1819int
e87a358a 1820Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1821{
b32dd47e 1822 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS
1823}
1824
9e353e3b 1825STDCHAR *
e87a358a 1826Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1827{
b32dd47e 1828 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS
1829}
1830
05d1247b 1831int
e87a358a 1832Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1833{
b32dd47e 1834 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS
1835}
1836
9e353e3b 1837void
e87a358a 1838Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1839{
b32dd47e 1840 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS
1841}
1842
9e353e3b 1843void
e87a358a 1844Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1845{
b32dd47e 1846 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS
1847}
1848
4ec2216f 1849
9e353e3b 1850/*--------------------------------------------------------------------------------------*/
14a5cf38 1851/*
71200d45 1852 * utf8 and raw dummy layers
14a5cf38 1853 */
dfebf958 1854
26fb694e 1855IV
2dc2558e 1856PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1857{
96a5add6 1858 PERL_UNUSED_CONTEXT;
8772537c
AL
1859 PERL_UNUSED_ARG(mode);
1860 PERL_UNUSED_ARG(arg);
00f51856 1861 if (PerlIOValid(f)) {
14a5cf38
JH
1862 if (tab->kind & PERLIO_K_UTF8)
1863 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1864 else
1865 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1866 return 0;
1867 }
1868 return -1;
26fb694e
NIS
1869}
1870
27da23d5 1871PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1872 sizeof(PerlIO_funcs),
14a5cf38 1873 "utf8",
2dc2558e 1874 0,
6874a2de 1875 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1876 PerlIOUtf8_pushed,
1877 NULL,
1878 NULL,
1879 NULL,
1880 NULL,
1881 NULL,
1882 NULL,
1883 NULL,
1884 NULL,
1885 NULL,
1886 NULL,
de009b76
AL
1887 NULL,
1888 NULL,
22569500
NIS
1889 NULL, /* flush */
1890 NULL, /* fill */
14a5cf38
JH
1891 NULL,
1892 NULL,
1893 NULL,
1894 NULL,
22569500
NIS
1895 NULL, /* get_base */
1896 NULL, /* get_bufsiz */
1897 NULL, /* get_ptr */
1898 NULL, /* get_cnt */
1899 NULL, /* set_ptrcnt */
26fb694e
NIS
1900};
1901
27da23d5 1902PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1903 sizeof(PerlIO_funcs),
14a5cf38 1904 "bytes",
2dc2558e 1905 0,
14a5cf38
JH
1906 PERLIO_K_DUMMY,
1907 PerlIOUtf8_pushed,
1908 NULL,
1909 NULL,
1910 NULL,
1911 NULL,
1912 NULL,
1913 NULL,
1914 NULL,
1915 NULL,
1916 NULL,
1917 NULL,
de009b76
AL
1918 NULL,
1919 NULL,
22569500
NIS
1920 NULL, /* flush */
1921 NULL, /* fill */
14a5cf38
JH
1922 NULL,
1923 NULL,
1924 NULL,
1925 NULL,
22569500
NIS
1926 NULL, /* get_base */
1927 NULL, /* get_bufsiz */
1928 NULL, /* get_ptr */
1929 NULL, /* get_cnt */
1930 NULL, /* set_ptrcnt */
dfebf958
NIS
1931};
1932
1933PerlIO *
14a5cf38
JH
1934PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1935 IV n, const char *mode, int fd, int imode, int perm,
1936 PerlIO *old, int narg, SV **args)
dfebf958 1937{
8772537c
AL
1938 PerlIO_funcs * const tab = PerlIO_default_btm();
1939 PERL_UNUSED_ARG(self);
210e727c
JH
1940 if (tab && tab->Open)
1941 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1942 old, narg, args);
1943 SETERRNO(EINVAL, LIB_INVARG);
1944 return NULL;
dfebf958
NIS
1945}
1946
27da23d5 1947PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1948 sizeof(PerlIO_funcs),
14a5cf38 1949 "raw",
2dc2558e 1950 0,
14a5cf38
JH
1951 PERLIO_K_DUMMY,
1952 PerlIORaw_pushed,
1953 PerlIOBase_popped,
1954 PerlIORaw_open,
1955 NULL,
1956 NULL,
1957 NULL,
1958 NULL,
1959 NULL,
1960 NULL,
1961 NULL,
1962 NULL,
de009b76
AL
1963 NULL,
1964 NULL,
22569500
NIS
1965 NULL, /* flush */
1966 NULL, /* fill */
14a5cf38
JH
1967 NULL,
1968 NULL,
1969 NULL,
1970 NULL,
22569500
NIS
1971 NULL, /* get_base */
1972 NULL, /* get_bufsiz */
1973 NULL, /* get_ptr */
1974 NULL, /* get_cnt */
1975 NULL, /* set_ptrcnt */
dfebf958
NIS
1976};
1977/*--------------------------------------------------------------------------------------*/
1978/*--------------------------------------------------------------------------------------*/
14a5cf38 1979/*
71200d45 1980 * "Methods" of the "base class"
14a5cf38 1981 */
9e353e3b
NIS
1982
1983IV
f62ce20a 1984PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1985{
04892f78 1986 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1987}
1988
f5b9d040 1989char *
81428673 1990PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1991{
1992 char *s = buf;
81428673 1993 if (PerlIOValid(f)) {
de009b76 1994 const IV flags = PerlIOBase(f)->flags;
81428673
NIS
1995 if (flags & PERLIO_F_APPEND) {
1996 *s++ = 'a';
1997 if (flags & PERLIO_F_CANREAD) {
1998 *s++ = '+';
1999 }
14a5cf38 2000 }
81428673
NIS
2001 else if (flags & PERLIO_F_CANREAD) {
2002 *s++ = 'r';
2003 if (flags & PERLIO_F_CANWRITE)
2004 *s++ = '+';
2005 }
2006 else if (flags & PERLIO_F_CANWRITE) {
2007 *s++ = 'w';
2008 if (flags & PERLIO_F_CANREAD) {
2009 *s++ = '+';
2010 }
14a5cf38 2011 }
35990314 2012#ifdef PERLIO_USING_CRLF
81428673
NIS
2013 if (!(flags & PERLIO_F_CRLF))
2014 *s++ = 'b';
5f1a76d0 2015#endif
81428673 2016 }
14a5cf38
JH
2017 *s = '\0';
2018 return buf;
f5b9d040
NIS
2019}
2020
81428673 2021
76ced9ad 2022IV
2dc2558e 2023PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 2024{
de009b76 2025 PerlIOl * const l = PerlIOBase(f);
96a5add6 2026 PERL_UNUSED_CONTEXT;
8772537c 2027 PERL_UNUSED_ARG(arg);
de009b76 2028
14a5cf38
JH
2029 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2030 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2031 if (tab->Set_ptrcnt != NULL)
2032 l->flags |= PERLIO_F_FASTGETS;
2033 if (mode) {
3b6c1aba 2034 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2035 mode++;
2036 switch (*mode++) {
2037 case 'r':
2038 l->flags |= PERLIO_F_CANREAD;
2039 break;
2040 case 'a':
2041 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2042 break;
2043 case 'w':
2044 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2045 break;
2046 default:
93189314 2047 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2048 return -1;
2049 }
2050 while (*mode) {
2051 switch (*mode++) {
2052 case '+':
2053 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2054 break;
2055 case 'b':
2056 l->flags &= ~PERLIO_F_CRLF;
2057 break;
2058 case 't':
2059 l->flags |= PERLIO_F_CRLF;
2060 break;
2061 default:
93189314 2062 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2063 return -1;
2064 }
2065 }
2066 }
2067 else {
2068 if (l->next) {
2069 l->flags |= l->next->flags &
2070 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2071 PERLIO_F_APPEND);
2072 }
2073 }
5e2ab84b 2074#if 0
14a5cf38 2075 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
6c9570dc 2076 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
14a5cf38 2077 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 2078#endif
14a5cf38 2079 return 0;
76ced9ad
NIS
2080}
2081
2082IV
f62ce20a 2083PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2084{
96a5add6 2085 PERL_UNUSED_CONTEXT;
8772537c 2086 PERL_UNUSED_ARG(f);
14a5cf38 2087 return 0;
760ac839
LW
2088}
2089
9e353e3b 2090SSize_t
f62ce20a 2091PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2092{
14a5cf38 2093 /*
71200d45 2094 * Save the position as current head considers it
14a5cf38 2095 */
de009b76 2096 const Off_t old = PerlIO_tell(f);
a0714e2c 2097 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
14a5cf38 2098 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2099 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS
2100}
2101
f6c77cf1 2102SSize_t
f62ce20a 2103PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2104{
14a5cf38
JH
2105 STDCHAR *buf = (STDCHAR *) vbuf;
2106 if (f) {
263df5f1
JH
2107 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2108 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2109 SETERRNO(EBADF, SS_IVCHAN);
2110 return 0;
2111 }
14a5cf38 2112 while (count > 0) {
93c2c2ec
IZ
2113 get_cnt:
2114 {
14a5cf38
JH
2115 SSize_t avail = PerlIO_get_cnt(f);
2116 SSize_t take = 0;
2117 if (avail > 0)
bb7a0f54 2118 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
14a5cf38
JH
2119 if (take > 0) {
2120 STDCHAR *ptr = PerlIO_get_ptr(f);
2121 Copy(ptr, buf, take, STDCHAR);
2122 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2123 count -= take;
2124 buf += take;
93c2c2ec
IZ
2125 if (avail == 0) /* set_ptrcnt could have reset avail */
2126 goto get_cnt;
14a5cf38
JH
2127 }
2128 if (count > 0 && avail <= 0) {
2129 if (PerlIO_fill(f) != 0)
2130 break;
2131 }
93c2c2ec 2132 }
14a5cf38
JH
2133 }
2134 return (buf - (STDCHAR *) vbuf);
2135 }
f6c77cf1 2136 return 0;
f6c77cf1
NIS
2137}
2138
9e353e3b 2139IV
f62ce20a 2140PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2141{
96a5add6 2142 PERL_UNUSED_CONTEXT;
8772537c 2143 PERL_UNUSED_ARG(f);
14a5cf38 2144 return 0;
9e353e3b
NIS
2145}
2146
2147IV
f62ce20a 2148PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2149{
96a5add6 2150 PERL_UNUSED_CONTEXT;
8772537c 2151 PERL_UNUSED_ARG(f);
14a5cf38 2152 return -1;
06da4f11
NIS
2153}
2154
2155IV
f62ce20a 2156PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2157{
37725cdc
NIS
2158 IV code = -1;
2159 if (PerlIOValid(f)) {
2160 PerlIO *n = PerlIONext(f);
2161 code = PerlIO_flush(f);
2162 PerlIOBase(f)->flags &=
2163 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2164 while (PerlIOValid(n)) {
de009b76 2165 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS
2166 if (tab && tab->Close) {
2167 if ((*tab->Close)(aTHX_ n) != 0)
2168 code = -1;
2169 break;
2170 }
2171 else {
2172 PerlIOBase(n)->flags &=
2173 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2174 }
2175 n = PerlIONext(n);
2176 }
2177 }
2178 else {
2179 SETERRNO(EBADF, SS_IVCHAN);
2180 }
14a5cf38 2181 return code;
9e353e3b
NIS
2182}
2183
2184IV
f62ce20a 2185PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2186{
96a5add6 2187 PERL_UNUSED_CONTEXT;
04892f78 2188 if (PerlIOValid(f)) {
14a5cf38
JH
2189 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2190 }
2191 return 1;
9e353e3b
NIS
2192}
2193
2194IV
f62ce20a 2195PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2196{
96a5add6 2197 PERL_UNUSED_CONTEXT;
04892f78 2198 if (PerlIOValid(f)) {
14a5cf38
JH
2199 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2200 }
2201 return 1;
9e353e3b
NIS
2202}
2203
2204void
f62ce20a 2205PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2206{
04892f78 2207 if (PerlIOValid(f)) {
dcda55fc 2208 PerlIO * const n = PerlIONext(f);
14a5cf38 2209 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2210 if (PerlIOValid(n))
14a5cf38
JH
2211 PerlIO_clearerr(n);
2212 }
9e353e3b
NIS
2213}
2214
2215void
f62ce20a 2216PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2217{
96a5add6 2218 PERL_UNUSED_CONTEXT;
04892f78 2219 if (PerlIOValid(f)) {
14a5cf38
JH
2220 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2221 }
9e353e3b
NIS
2222}
2223
93a8090d
NIS
2224SV *
2225PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2226{
2227 if (!arg)
a0714e2c 2228 return NULL;
93a8090d
NIS
2229#ifdef sv_dup
2230 if (param) {
a951d81d
BL
2231 arg = sv_dup(arg, param);
2232 SvREFCNT_inc_simple_void_NN(arg);
2233 return arg;
93a8090d
NIS
2234 }
2235 else {
2236 return newSVsv(arg);
2237 }
2238#else
1b6737cc 2239 PERL_UNUSED_ARG(param);
93a8090d
NIS
2240 return newSVsv(arg);
2241#endif
2242}
2243
2244PerlIO *
ecdeb87c 2245PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d 2246{
1b6737cc 2247 PerlIO * const nexto = PerlIONext(o);
04892f78 2248 if (PerlIOValid(nexto)) {
de009b76 2249 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS
2250 if (tab && tab->Dup)
2251 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2252 else
2253 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2254 }
2255 if (f) {
dcda55fc 2256 PerlIO_funcs * const self = PerlIOBase(o)->tab;
a951d81d 2257 SV *arg = NULL;
93a8090d 2258 char buf[8];
fe5a182c
JH
2259 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2260 self->name, (void*)f, (void*)o, (void*)param);
210e727c
JH
2261 if (self->Getarg)
2262 arg = (*self->Getarg)(aTHX_ o, param, flags);
93a8090d 2263 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
a951d81d 2264 if (arg)
93a8090d 2265 SvREFCNT_dec(arg);
93a8090d
NIS
2266 }
2267 return f;
2268}
2269
27da23d5 2270/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d 2271
8b84d7dd 2272/* Must be called with PL_perlio_mutex locked. */
22c96fc1
NC
2273static void
2274S_more_refcounted_fds(pTHX_ const int new_fd) {
7a89be66 2275 dVAR;
22c96fc1 2276 const int old_max = PL_perlio_fd_refcnt_size;
f4ae5be6 2277 const int new_max = 16 + (new_fd & ~15);
22c96fc1
NC
2278 int *new_array;
2279
2280 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2281 old_max, new_fd, new_max);
2282
2283 if (new_fd < old_max) {
2284 return;
2285 }
2286
f4ae5be6
NC
2287 assert (new_max > new_fd);
2288
eae082a0
JH
2289 /* Use plain realloc() since we need this memory to be really
2290 * global and visible to all the interpreters and/or threads. */
2291 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
22c96fc1
NC
2292
2293 if (!new_array) {
8b84d7dd 2294#ifdef USE_ITHREADS
6cb8cb21 2295 MUTEX_UNLOCK(&PL_perlio_mutex);
22c96fc1
NC
2296#endif
2297 /* Can't use PerlIO to write as it allocates memory */
2298 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2299 PL_no_mem, strlen(PL_no_mem));
2300 my_exit(1);
2301 }
2302
2303 PL_perlio_fd_refcnt_size = new_max;
2304 PL_perlio_fd_refcnt = new_array;
2305
95b63a38
JH
2306 PerlIO_debug("Zeroing %p, %d\n",
2307 (void*)(new_array + old_max),
2308 new_max - old_max);
22c96fc1
NC
2309
2310 Zero(new_array + old_max, new_max - old_max, int);
2311}
2312
2313
93a8090d
NIS
2314void
2315PerlIO_init(pTHX)
2316{
8b84d7dd 2317 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
96a5add6 2318 PERL_UNUSED_CONTEXT;
93a8090d
NIS
2319}
2320
168d5872
NIS
2321void
2322PerlIOUnix_refcnt_inc(int fd)
2323{
27da23d5 2324 dTHX;
22c96fc1 2325 if (fd >= 0) {
97aff369 2326 dVAR;
22c96fc1 2327
8b84d7dd 2328#ifdef USE_ITHREADS
6cb8cb21 2329 MUTEX_LOCK(&PL_perlio_mutex);
168d5872 2330#endif
22c96fc1
NC
2331 if (fd >= PL_perlio_fd_refcnt_size)
2332 S_more_refcounted_fds(aTHX_ fd);
2333
27da23d5 2334 PL_perlio_fd_refcnt[fd]++;
8b84d7dd
RGS
2335 if (PL_perlio_fd_refcnt[fd] <= 0) {
2336 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2337 fd, PL_perlio_fd_refcnt[fd]);
2338 }
2339 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2340 fd, PL_perlio_fd_refcnt[fd]);
22c96fc1 2341
8b84d7dd 2342#ifdef USE_ITHREADS
6cb8cb21 2343 MUTEX_UNLOCK(&PL_perlio_mutex);
168d5872 2344#endif
8b84d7dd
RGS
2345 } else {
2346 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
168d5872
NIS
2347 }
2348}
2349
168d5872
NIS
2350int
2351PerlIOUnix_refcnt_dec(int fd)
2352{
27da23d5 2353 dTHX;
168d5872 2354 int cnt = 0;
22c96fc1 2355 if (fd >= 0) {
97aff369 2356 dVAR;
8b84d7dd 2357#ifdef USE_ITHREADS
6cb8cb21 2358 MUTEX_LOCK(&PL_perlio_mutex);
168d5872 2359#endif
8b84d7dd
RGS
2360 if (fd >= PL_perlio_fd_refcnt_size) {
2361 Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
2362 fd, PL_perlio_fd_refcnt_size);
2363 }
2364 if (PL_perlio_fd_refcnt[fd] <= 0) {
2365 Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
2366 fd, PL_perlio_fd_refcnt[fd]);
2367 }
27da23d5 2368 cnt = --PL_perlio_fd_refcnt[fd];
8b84d7dd
RGS
2369 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2370#ifdef USE_ITHREADS
6cb8cb21 2371 MUTEX_UNLOCK(&PL_perlio_mutex);
168d5872 2372#endif
8b84d7dd
RGS
2373 } else {
2374 Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
168d5872
NIS
2375 }
2376 return cnt;
2377}
2378
694c95cf
JH
2379void
2380PerlIO_cleanup(pTHX)
2381{
97aff369 2382 dVAR;
694c95cf
JH
2383 int i;
2384#ifdef USE_ITHREADS
a25429c6 2385 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
9f4bd222
NIS
2386#else
2387 PerlIO_debug("Cleanup layers\n");
694c95cf 2388#endif
e47547a8 2389
694c95cf
JH
2390 /* Raise STDIN..STDERR refcount so we don't close them */
2391 for (i=0; i < 3; i++)
2392 PerlIOUnix_refcnt_inc(i);
2393 PerlIO_cleantable(aTHX_ &PL_perlio);
2394 /* Restore STDIN..STDERR refcount */
2395 for (i=0; i < 3; i++)
2396 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2397
2398 if (PL_known_layers) {
2399 PerlIO_list_free(aTHX_ PL_known_layers);
2400 PL_known_layers = NULL;
2401 }
27da23d5 2402 if (PL_def_layerlist) {
9f4bd222
NIS
2403 PerlIO_list_free(aTHX_ PL_def_layerlist);
2404 PL_def_layerlist = NULL;
2405 }
6cb8cb21
RGS
2406}
2407
2408void PerlIO_teardown(pTHX) /* Call only from PERL_SYS_TERM(). */
2409{
53d44271 2410 dVAR;
6cb8cb21
RGS
2411#ifdef DEBUGGING
2412 {
2413 /* By now all filehandles should have been closed, so any
2414 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2415 * errors. */
2416 int i;
2417 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2418 if (PL_perlio_fd_refcnt[i])
2419 PerlIO_debug("PerlIO_cleanup: fd %d refcnt=%d\n",
2420 i, PL_perlio_fd_refcnt[i]);
2421 }
2422 }
2423#endif
eae082a0
JH
2424 /* Not bothering with PL_perlio_mutex since by now
2425 * all the interpreters are gone. */
1cd82952
RGS
2426 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2427 && PL_perlio_fd_refcnt) {
eae082a0 2428 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
432ce874
YO
2429 PL_perlio_fd_refcnt = NULL;
2430 PL_perlio_fd_refcnt_size = 0;
1cd82952 2431 }
694c95cf
JH
2432}
2433
9e353e3b 2434/*--------------------------------------------------------------------------------------*/
14a5cf38 2435/*
71200d45 2436 * Bottom-most level for UNIX-like case
14a5cf38 2437 */
9e353e3b 2438
14a5cf38 2439typedef struct {
22569500
NIS
2440 struct _PerlIO base; /* The generic part */
2441 int fd; /* UNIX like file descriptor */
2442 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2443} PerlIOUnix;
2444
6f9d8c32 2445int
9e353e3b 2446PerlIOUnix_oflags(const char *mode)
760ac839 2447{
14a5cf38 2448 int oflags = -1;
3b6c1aba 2449 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH
2450 mode++;
2451 switch (*mode) {
2452 case 'r':
2453 oflags = O_RDONLY;
2454 if (*++mode == '+') {
2455 oflags = O_RDWR;
2456 mode++;
2457 }
2458 break;
2459
2460 case 'w':
2461 oflags = O_CREAT | O_TRUNC;
2462 if (*++mode == '+') {
2463 oflags |= O_RDWR;
2464 mode++;
2465 }
2466 else
2467 oflags |= O_WRONLY;
2468 break;
2469
2470 case 'a':
2471 oflags = O_CREAT | O_APPEND;
2472 if (*++mode == '+') {
2473 oflags |= O_RDWR;
2474 mode++;
2475 }
2476 else
2477 oflags |= O_WRONLY;
2478 break;
2479 }
2480 if (*mode == 'b') {
2481 oflags |= O_BINARY;
2482 oflags &= ~O_TEXT;
2483 mode++;
2484 }
2485 else if (*mode == 't') {
2486 oflags |= O_TEXT;
2487 oflags &= ~O_BINARY;
2488 mode++;
2489 }
2490 /*
71200d45 2491 * Always open in binary mode
14a5cf38
JH
2492 */
2493 oflags |= O_BINARY;
2494 if (*mode || oflags == -1) {
93189314 2495 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2496 oflags = -1;
2497 }
2498 return oflags;
9e353e3b
NIS
2499}
2500
2501IV
f62ce20a 2502PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2503{
96a5add6 2504 PERL_UNUSED_CONTEXT;
14a5cf38 2505 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2506}
2507
aa063c35
NIS
2508static void
2509PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2510{
de009b76 2511 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2512#if defined(WIN32)
aa063c35
NIS
2513 Stat_t st;
2514 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2515 if (!S_ISREG(st.st_mode)) {
aa063c35 2516 PerlIO_debug("%d is not regular file\n",fd);
6caa5a9c
NIS
2517 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2518 }
aa063c35
NIS
2519 else {
2520 PerlIO_debug("%d _is_ a regular file\n",fd);
2521 }
6caa5a9c
NIS
2522 }
2523#endif
aa063c35
NIS
2524 s->fd = fd;
2525 s->oflags = imode;
2526 PerlIOUnix_refcnt_inc(fd);
96a5add6 2527 PERL_UNUSED_CONTEXT;
aa063c35
NIS
2528}
2529
2530IV
2531PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2532{
2533 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2534 if (*PerlIONext(f)) {
4b069b44 2535 /* We never call down so do any pending stuff now */
03c0554d 2536 PerlIO_flush(PerlIONext(f));
14a5cf38 2537 /*
71200d45 2538 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2539 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2540 * Should the value on NULL mode be 0 or -1?
14a5cf38 2541 */
acbd16bf 2542 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2543 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH
2544 }
2545 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2546
14a5cf38 2547 return code;
4b803d04
NIS
2548}
2549
c2fcde81
JH
2550IV
2551PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2552{
de009b76 2553 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2554 Off_t new_loc;
96a5add6 2555 PERL_UNUSED_CONTEXT;
c2fcde81
JH
2556 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2557#ifdef ESPIPE
2558 SETERRNO(ESPIPE, LIB_INVARG);
2559#else
2560 SETERRNO(EINVAL, LIB_INVARG);
2561#endif
2562 return -1;
2563 }
0723351e
NC
2564 new_loc = PerlLIO_lseek(fd, offset, whence);
2565 if (new_loc == (Off_t) - 1)
dcda55fc 2566 return -1;
c2fcde81
JH
2567 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2568 return 0;
2569}
2570
9e353e3b 2571PerlIO *
14a5cf38
JH
2572PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2573 IV n, const char *mode, int fd, int imode,
2574 int perm, PerlIO *f, int narg, SV **args)
2575{
d9dac8cd 2576 if (PerlIOValid(f)) {
14a5cf38 2577 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2578 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2579 }
2580 if (narg > 0) {
3b6c1aba 2581 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH
2582 mode++;
2583 else {
2584 imode = PerlIOUnix_oflags(mode);
2585 perm = 0666;
2586 }
2587 if (imode != -1) {
e62f0680 2588 const char *path = SvPV_nolen_const(*args);
14a5cf38
JH
2589 fd = PerlLIO_open3(path, imode, perm);
2590 }
2591 }
2592 if (fd >= 0) {
3b6c1aba 2593 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2594 mode++;
2595 if (!f) {
2596 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2597 }
2598 if (!PerlIOValid(f)) {
a33cf58c
NIS
2599 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2600 return NULL;
2601 }
d9dac8cd 2602 }
aa063c35 2603 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2604 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH
2605 if (*mode == IoTYPE_APPEND)
2606 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH
2607 return f;
2608 }
2609 else {
2610 if (f) {
6f207bd3 2611 NOOP;
14a5cf38 2612 /*
71200d45 2613 * FIXME: pop layers ???
14a5cf38
JH
2614 */
2615 }
2616 return NULL;
2617 }
9e353e3b
NIS
2618}
2619
71200d45 2620PerlIO *
ecdeb87c 2621PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 2622{
dcda55fc 2623 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2624 int fd = os->fd;
ecdeb87c
NIS
2625 if (flags & PERLIO_DUP_FD) {
2626 fd = PerlLIO_dup(fd);
2627 }
22c96fc1 2628 if (fd >= 0) {
ecdeb87c 2629 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2630 if (f) {
2631 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2632 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS
2633 return f;
2634 }
71200d45
NIS
2635 }
2636 return NULL;
2637}
2638
2639
9e353e3b 2640SSize_t
f62ce20a 2641PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2642{
97aff369 2643 dVAR;
de009b76 2644 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2645#ifdef PERLIO_STD_SPECIAL
2646 if (fd == 0)
2647 return PERLIO_STD_IN(fd, vbuf, count);
2648#endif
81428673 2649 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2650 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2651 return 0;
1fd8f4ce 2652 }
14a5cf38 2653 while (1) {
b464bac0 2654 const SSize_t len = PerlLIO_read(fd, vbuf, count);
14a5cf38 2655 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2656 if (len < 0) {
2657 if (errno != EAGAIN) {
2658 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2659 }
2660 }
2661 else if (len == 0 && count != 0) {
14a5cf38 2662 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS
2663 SETERRNO(0,0);
2664 }
14a5cf38
JH
2665 return len;
2666 }
2667 PERL_ASYNC_CHECK();
2668 }
b464bac0 2669 /*NOTREACHED*/
9e353e3b
NIS
2670}
2671
2672SSize_t
f62ce20a 2673PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2674{
97aff369 2675 dVAR;
de009b76 2676 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2677#ifdef PERLIO_STD_SPECIAL
2678 if (fd == 1 || fd == 2)
2679 return PERLIO_STD_OUT(fd, vbuf, count);
2680#endif
14a5cf38 2681 while (1) {
de009b76 2682 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2683 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2684 if (len < 0) {
2685 if (errno != EAGAIN) {
2686 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2687 }
2688 }
14a5cf38
JH
2689 return len;
2690 }
2691 PERL_ASYNC_CHECK();
06da4f11 2692 }
1b6737cc 2693 /*NOTREACHED*/
9e353e3b
NIS
2694}
2695
9e353e3b 2696Off_t
f62ce20a 2697PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2698{
96a5add6
AL
2699 PERL_UNUSED_CONTEXT;
2700
14a5cf38 2701 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2702}
2703
71200d45 2704
9e353e3b 2705IV
f62ce20a 2706PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2707{
97aff369 2708 dVAR;
de009b76 2709 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2710 int code = 0;
168d5872
NIS
2711 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2712 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2713 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2714 return 0;
22569500 2715 }
93a8090d
NIS
2716 }
2717 else {
93189314 2718 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2719 return -1;
2720 }
14a5cf38
JH
2721 while (PerlLIO_close(fd) != 0) {
2722 if (errno != EINTR) {
2723 code = -1;
2724 break;
2725 }
2726 PERL_ASYNC_CHECK();
2727 }
2728 if (code == 0) {
2729 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2730 }
2731 return code;
9e353e3b
NIS
2732}
2733
27da23d5 2734PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2735 sizeof(PerlIO_funcs),
14a5cf38
JH
2736 "unix",
2737 sizeof(PerlIOUnix),
2738 PERLIO_K_RAW,
2739 PerlIOUnix_pushed,
44798d05 2740 PerlIOBase_popped,
14a5cf38 2741 PerlIOUnix_open,
86e05cf2 2742 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2743 NULL,
2744 PerlIOUnix_fileno,
71200d45 2745 PerlIOUnix_dup,
14a5cf38
JH
2746 PerlIOUnix_read,
2747 PerlIOBase_unread,
2748 PerlIOUnix_write,
2749 PerlIOUnix_seek,
2750 PerlIOUnix_tell,
2751 PerlIOUnix_close,
22569500
NIS
2752 PerlIOBase_noop_ok, /* flush */
2753 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2754 PerlIOBase_eof,
2755 PerlIOBase_error,
2756 PerlIOBase_clearerr,
2757 PerlIOBase_setlinebuf,
22569500
NIS
2758 NULL, /* get_base */
2759 NULL, /* get_bufsiz */
2760 NULL, /* get_ptr */
2761 NULL, /* get_cnt */
2762 NULL, /* set_ptrcnt */
9e353e3b
NIS
2763};
2764
2765/*--------------------------------------------------------------------------------------*/
14a5cf38 2766/*
71200d45 2767 * stdio as a layer
14a5cf38 2768 */
9e353e3b 2769
313e59c8
NIS
2770#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2771/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2772 broken by the last second glibc 2.3 fix
2773 */
2774#define STDIO_BUFFER_WRITABLE
2775#endif
2776
2777
14a5cf38
JH
2778typedef struct {
2779 struct _PerlIO base;
22569500 2780 FILE *stdio; /* The stream */
9e353e3b
NIS
2781} PerlIOStdio;
2782
2783IV
f62ce20a 2784PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2785{
96a5add6
AL
2786 PERL_UNUSED_CONTEXT;
2787
c4420975
AL
2788 if (PerlIOValid(f)) {
2789 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2790 if (s)
2791 return PerlSIO_fileno(s);
439ba545
NIS
2792 }
2793 errno = EBADF;
2794 return -1;
9e353e3b
NIS
2795}
2796
766a733e 2797char *
14a5cf38
JH
2798PerlIOStdio_mode(const char *mode, char *tmode)
2799{
de009b76 2800 char * const ret = tmode;
a0625d38
SR
2801 if (mode) {
2802 while (*mode) {
2803 *tmode++ = *mode++;
2804 }
14a5cf38 2805 }
95005ad8 2806#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH
2807 *tmode++ = 'b';
2808#endif
14a5cf38
JH
2809 *tmode = '\0';
2810 return ret;
2811}
2812
4b803d04 2813IV
2dc2558e 2814PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2815{
1fd8f4ce
NIS
2816 PerlIO *n;
2817 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
46c461b5 2818 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
1fd8f4ce
NIS
2819 if (toptab == tab) {
2820 /* Top is already stdio - pop self (duplicate) and use original */
2821 PerlIO_pop(aTHX_ f);
2822 return 0;
2823 } else {
de009b76 2824 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS
2825 char tmode[8];
2826 FILE *stdio;
81428673 2827 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2828 mode = PerlIOStdio_mode(mode, tmode)))) {
2829 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2830 /* We never call down so do any pending stuff now */
2831 PerlIO_flush(PerlIONext(f));
81428673 2832 }
1fd8f4ce
NIS
2833 else {
2834 return -1;
2835 }
2836 }
14a5cf38 2837 }
2dc2558e 2838 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2839}
2840
22569500 2841
9e353e3b 2842PerlIO *
4b069b44 2843PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2844{
14a5cf38
JH
2845 dTHX;
2846 PerlIO *f = NULL;
2847 if (stdio) {
22569500 2848 PerlIOStdio *s;
4b069b44
NIS
2849 if (!mode || !*mode) {
2850 /* We need to probe to see how we can open the stream
2851 so start with read/write and then try write and read
2852 we dup() so that we can fclose without loosing the fd.
2853
2854 Note that the errno value set by a failing fdopen
2855 varies between stdio implementations.
2856 */
de009b76 2857 const int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2858 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2859 if (!f2) {
a33cf58c 2860 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2861 }
2862 if (!f2) {
a33cf58c 2863 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2864 }
2865 if (!f2) {
2866 /* Don't seem to be able to open */
2867 PerlLIO_close(fd);
2868 return f;
2869 }
2870 fclose(f2);
22569500 2871 }
a0714e2c 2872 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
a33cf58c
NIS
2873 s = PerlIOSelf(f, PerlIOStdio);
2874 s->stdio = stdio;
2875 }
14a5cf38
JH
2876 }
2877 return f;
9e353e3b
NIS
2878}
2879
2880PerlIO *
14a5cf38
JH
2881PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2882 IV n, const char *mode, int fd, int imode,
2883 int perm, PerlIO *f, int narg, SV **args)
2884{
2885 char tmode[8];
d9dac8cd 2886 if (PerlIOValid(f)) {
dcda55fc
AL
2887 const char * const path = SvPV_nolen_const(*args);
2888 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2889 FILE *stdio;
2890 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2891 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2892 s->stdio);
2893 if (!s->stdio)
2894 return NULL;
2895 s->stdio = stdio;
1751d015 2896 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2897 return f;
2898 }
2899 else {
2900 if (narg > 0) {
dcda55fc 2901 const char * const path = SvPV_nolen_const(*args);
3b6c1aba 2902 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
2903 mode++;
2904 fd = PerlLIO_open3(path, imode, perm);
2905 }
2906 else {
95005ad8
GH
2907 FILE *stdio;
2908 bool appended = FALSE;
2909#ifdef __CYGWIN__
2910 /* Cygwin wants its 'b' early. */
2911 appended = TRUE;
2912 mode = PerlIOStdio_mode(mode, tmode);
2913#endif
2914 stdio = PerlSIO_fopen(path, mode);
6f0313ac 2915 if (stdio) {
6f0313ac
JH
2916 if (!f) {
2917 f = PerlIO_allocate(aTHX);
2918 }
95005ad8
GH
2919 if (!appended)
2920 mode = PerlIOStdio_mode(mode, tmode);
2921 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2922 if (f) {
0f0f9e2b
JH
2923 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2924 PerlIOUnix_refcnt_inc(fileno(stdio));
2925 } else {
2926 PerlSIO_fclose(stdio);
6f0313ac
JH
2927 }
2928 return f;
2929 }
2930 else {
2931 return NULL;
2932 }
14a5cf38
JH
2933 }
2934 }
2935 if (fd >= 0) {
2936 FILE *stdio = NULL;
2937 int init = 0;
3b6c1aba 2938 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
2939 init = 1;
2940 mode++;
2941 }
2942 if (init) {
2943 switch (fd) {
2944 case 0:
2945 stdio = PerlSIO_stdin;
2946 break;
2947 case 1:
2948 stdio = PerlSIO_stdout;
2949 break;
2950 case 2:
2951 stdio = PerlSIO_stderr;
2952 break;
2953 }
2954 }
2955 else {
2956 stdio = PerlSIO_fdopen(fd, mode =
2957 PerlIOStdio_mode(mode, tmode));
2958 }
2959 if (stdio) {
d9dac8cd
NIS
2960 if (!f) {
2961 f = PerlIO_allocate(aTHX);
2962 }
a33cf58c 2963 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
1a159fba
JH
2964 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2965 PerlIOUnix_refcnt_inc(fileno(stdio));
a33cf58c 2966 }
14a5cf38
JH
2967 return f;
2968 }
2969 }
2970 }
ee518936 2971 return NULL;
9e353e3b
NIS
2972}
2973
1751d015 2974PerlIO *
ecdeb87c 2975PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2976{
2977 /* This assumes no layers underneath - which is what
2978 happens, but is not how I remember it. NI-S 2001/10/16
2979 */
ecdeb87c 2980 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2981 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 2982 const int fd = fileno(stdio);
9217ff3f 2983 char mode[8];
ecdeb87c 2984 if (flags & PERLIO_DUP_FD) {
de009b76 2985 const int dfd = PerlLIO_dup(fileno(stdio));
9217ff3f
NIS
2986 if (dfd >= 0) {
2987 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2988 goto set_this;
ecdeb87c
NIS
2989 }
2990 else {
6f207bd3 2991 NOOP;
ecdeb87c
NIS
2992 /* FIXME: To avoid messy error recovery if dup fails
2993 re-use the existing stdio as though flag was not set
2994 */
2995 }
2996 }
9217ff3f
NIS
2997 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2998 set_this:
694c95cf
JH
2999 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3000 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
3001 }
3002 return f;
3003}
3004
0d7a5398
NIS
3005static int
3006PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3007{
96a5add6
AL
3008 PERL_UNUSED_CONTEXT;
3009
0d7a5398 3010 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 3011 * PerlIO_set_fileno() support from Configure
0d7a5398 3012 */
ef8eacb8
AT
3013# if defined(__UCLIBC__)
3014 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3015 f->__filedes = -1;
3016 return 1;
3017# elif defined(__GLIBC__)
0d7a5398 3018 /* There may be a better way for GLIBC:
37725cdc 3019 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS
3020 */
3021 f->_fileno = -1;
3022 return 1;
3023# elif defined(__sun__)
f5992bc4 3024 PERL_UNUSED_ARG(f);
cfedb851 3025 return 0;
0d7a5398
NIS
3026# elif defined(__hpux)
3027 f->__fileH = 0xff;
3028 f->__fileL = 0xff;
3029 return 1;
9837d373 3030 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 3031 your platform does not have special entry try this one.
9837d373
NIS
3032 [For OSF only have confirmation for Tru64 (alpha)
3033 but assume other OSFs will be similar.]
37725cdc 3034 */
9837d373 3035# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
3036 f->_file = -1;
3037 return 1;
3038# elif defined(__FreeBSD__)
3039 /* There may be a better way on FreeBSD:
37725cdc
NIS
3040 - we could insert a dummy func in the _close function entry
3041 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3042 */
3043 f->_file = -1;
0c49ea6a
SU
3044 return 1;
3045# elif defined(__OpenBSD__)
3046 /* There may be a better way on OpenBSD:
3047 - we could insert a dummy func in the _close function entry
3048 f->_close = (int (*)(void *)) dummy_close;
3049 */
3050 f->_file = -1;
0d7a5398 3051 return 1;
59ad941d
IZ
3052# elif defined(__EMX__)
3053 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3054 f->_handle = -1;
3055 return 1;
0d7a5398
NIS
3056# elif defined(__CYGWIN__)
3057 /* There may be a better way on CYGWIN:
37725cdc
NIS
3058 - we could insert a dummy func in the _close function entry
3059 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3060 */
3061 f->_file = -1;
3062 return 1;
3063# elif defined(WIN32)
3064# if defined(__BORLANDC__)
3065 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
3066# elif defined(UNDER_CE)
3067 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3068 structure at all
3069 */
0d7a5398
NIS
3070# else
3071 f->_file = -1;
3072# endif
3073 return 1;
3074# else
3075#if 0
37725cdc 3076 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 3077 (which isn't thread safe) instead
37725cdc 3078 */
0d7a5398
NIS
3079# error "Don't know how to set FILE.fileno on your platform"
3080#endif
8772537c 3081 PERL_UNUSED_ARG(f);
0d7a5398
NIS
3082 return 0;
3083# endif
3084}
3085
1751d015 3086IV
f62ce20a 3087PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 3088{
c4420975 3089 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
3090 if (!stdio) {
3091 errno = EBADF;
3092 return -1;
3093 }
9217ff3f 3094 else {
de009b76 3095 const int fd = fileno(stdio);
0d7a5398 3096 int invalidate = 0;
bbfd922f 3097 IV result = 0;
0d7a5398
NIS
3098 int saveerr = 0;
3099 int dupfd = 0;
3100#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS
3101 /* Socks lib overrides close() but stdio isn't linked to
3102 that library (though we are) - so we must call close()
3103 on sockets on stdio's behalf.
3104 */
0d7a5398
NIS
3105 int optval;
3106 Sock_size_t optlen = sizeof(int);
6b4ce6c8 3107 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
37725cdc 3108 invalidate = 1;
0d7a5398 3109#endif
6b4ce6c8 3110 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
0d7a5398 3111 invalidate = 1;
0d7a5398 3112 if (invalidate) {
6b4ce6c8
AL
3113 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3114 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3115 return 0;
3116 if (stdio == stdout || stdio == stderr)
3117 return PerlIO_flush(f);
37725cdc
NIS
3118 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3119 Use Sarathy's trick from maint-5.6 to invalidate the
3120 fileno slot of the FILE *
3121 */
bbfd922f 3122 result = PerlIO_flush(f);
0d7a5398 3123 saveerr = errno;
6b4ce6c8
AL
3124 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3125 if (!invalidate)
3126 dupfd = PerlLIO_dup(fd);
37725cdc 3127 }
0d7a5398 3128 result = PerlSIO_fclose(stdio);
37725cdc
NIS
3129 /* We treat error from stdio as success if we invalidated
3130 errno may NOT be expected EBADF
e8529473
NIS
3131 */
3132 if (invalidate && result != 0) {
0d7a5398
NIS
3133 errno = saveerr;
3134 result = 0;
37725cdc 3135 }
6b4ce6c8
AL
3136#ifdef SOCKS5_VERSION_NAME
3137 /* in SOCKS' case, let close() determine return value */
3138 result = close(fd);
3139#endif
0d7a5398
NIS
3140 if (dupfd) {
3141 PerlLIO_dup2(dupfd,fd);
8a521f28 3142 PerlLIO_close(dupfd);
9217ff3f
NIS
3143 }
3144 return result;
37725cdc 3145 }
1751d015
NIS
3146}
3147
9e353e3b 3148SSize_t
f62ce20a 3149PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3150{
97aff369 3151 dVAR;
c4420975 3152 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3153 SSize_t got = 0;
4d948241
NIS
3154 for (;;) {
3155 if (count == 1) {
3156 STDCHAR *buf = (STDCHAR *) vbuf;
3157 /*
3158 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3159 * stdio does not do that for fread()
3160 */
de009b76 3161 const int ch = PerlSIO_fgetc(s);
4d948241
NIS
3162 if (ch != EOF) {
3163 *buf = ch;
3164 got = 1;
3165 }
14a5cf38 3166 }
4d948241
NIS
3167 else
3168 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS
3169 if (got == 0 && PerlSIO_ferror(s))
3170 got = -1;
42a7a32f 3171 if (got >= 0 || errno != EINTR)
4d948241
NIS
3172 break;
3173 PERL_ASYNC_CHECK();
42a7a32f 3174 SETERRNO(0,0); /* just in case */
14a5cf38 3175 }
14a5cf38 3176 return got;
9e353e3b
NIS
3177}
3178
3179SSize_t
f62ce20a 3180PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3181{
14a5cf38 3182 SSize_t unread = 0;
c4420975 3183 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3184
313e59c8 3185#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3186 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3187 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3188 STDCHAR *base = PerlIO_get_base(f);
3189 SSize_t cnt = PerlIO_get_cnt(f);
3190 STDCHAR *ptr = PerlIO_get_ptr(f);
3191 SSize_t avail = ptr - base;
3192 if (avail > 0) {
3193 if (avail > count) {
3194 avail = count;
3195 }
3196 ptr -= avail;
3197 Move(buf-avail,ptr,avail,STDCHAR);
3198 count -= avail;
3199 unread += avail;
3200 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
3201 if (PerlSIO_feof(s) && unread >= 0)
3202 PerlSIO_clearerr(s);
3203 }
3204 }
313e59c8
NIS
3205 else
3206#endif
3207 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3208 /* We can get pointer to buffer but not its base
3209 Do ungetc() but check chars are ending up in the
3210 buffer
3211 */
3212 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3213 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3214 while (count > 0) {
de009b76 3215 const int ch = *--buf & 0xFF;
9f7cd136
NIS
3216 if (ungetc(ch,s) != ch) {
3217 /* ungetc did not work */
3218 break;
3219 }
3220 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3221 /* Did not change pointer as expected */
3222 fgetc(s); /* get char back again */
3223 break;
3224 }
3225 /* It worked ! */
3226 count--;
3227 unread++;
93679785
NIS
3228 }
3229 }
3230
3231 if (count > 0) {
3232 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
3233 }
3234 return unread;
9e353e3b
NIS
3235}
3236
3237SSize_t
f62ce20a 3238PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3239{
97aff369 3240 dVAR;
4d948241
NIS
3241 SSize_t got;
3242 for (;;) {
3243 got = PerlSIO_fwrite(vbuf, 1, count,
3244 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3245 if (got >= 0 || errno != EINTR)
4d948241
NIS
3246 break;
3247 PERL_ASYNC_CHECK();
42a7a32f 3248 SETERRNO(0,0); /* just in case */
4d948241
NIS
3249 }
3250 return got;
9e353e3b
NIS
3251}
3252
94a175e1 3253IV
f62ce20a 3254PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3255{
c4420975 3256 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3257 PERL_UNUSED_CONTEXT;
3258
94a175e1 3259 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
3260}
3261
3262Off_t
f62ce20a 3263PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3264{
c4420975 3265 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3266 PERL_UNUSED_CONTEXT;
3267
94a175e1 3268 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3269}
3270
3271IV
f62ce20a 3272PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3273{
c4420975 3274 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3275 PERL_UNUSED_CONTEXT;
3276
14a5cf38
JH
3277 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3278 return PerlSIO_fflush(stdio);
3279 }
3280 else {
6f207bd3 3281 NOOP;
88b61e10 3282#if 0
14a5cf38
JH
3283 /*
3284 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3285 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3286 * design is to do _this_ but not have layer above flush this
71200d45 3287 * layer read-to-read
14a5cf38
JH
3288 */
3289 /*
71200d45 3290 * Not writeable - sync by attempting a seek
14a5cf38 3291 */
79852593 3292 const int err = errno;
14a5cf38
JH
3293 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3294 errno = err;
88b61e10 3295#endif
14a5cf38
JH
3296 }
3297 return 0;
9e353e3b
NIS
3298}
3299
3300IV
f62ce20a 3301PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3302{
96a5add6
AL
3303 PERL_UNUSED_CONTEXT;
3304
14a5cf38 3305 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3306}
3307
3308IV
f62ce20a 3309PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3310{
96a5add6
AL
3311 PERL_UNUSED_CONTEXT;
3312
263df5f1 3313 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3314}
3315
3316void
f62ce20a 3317PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3318{
96a5add6
AL
3319 PERL_UNUSED_CONTEXT;
3320
14a5cf38 3321 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3322}
3323
3324void
f62ce20a 3325PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 3326{
96a5add6
AL
3327 PERL_UNUSED_CONTEXT;
3328
9e353e3b 3329#ifdef HAS_SETLINEBUF
14a5cf38 3330 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3331#else
bd61b366 3332 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
9e353e3b
NIS
3333#endif
3334}
3335
3336#ifdef FILE_base
3337STDCHAR *
f62ce20a 3338PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3339{
c4420975 3340 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3341 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3342}
3343
3344Size_t
f62ce20a 3345PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3346{
c4420975 3347 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3348 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3349}
3350#endif
3351
3352#ifdef USE_STDIO_PTR
3353STDCHAR *
f62ce20a 3354PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3355{
c4420975 3356 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3357 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3358}
3359
3360SSize_t
f62ce20a 3361PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3362{
c4420975 3363 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3364 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3365}
3366
3367void
f62ce20a 3368PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3369{
c4420975 3370 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3371 if (ptr != NULL) {
9e353e3b 3372#ifdef STDIO_PTR_LVALUE
d06fc7d4 3373 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3374#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3375 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3376 assert(PerlSIO_get_cnt(stdio) == (cnt));
3377 }
9e353e3b
NIS
3378#endif
3379#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3380 /*
71200d45 3381 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3382 */
3383 return;
9e353e3b 3384#endif
22569500 3385#else /* STDIO_PTR_LVALUE */
14a5cf38 3386 PerlProc_abort();
22569500 3387#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3388 }
3389 /*
71200d45 3390 * Now (or only) set cnt
14a5cf38 3391 */
9e353e3b 3392#ifdef STDIO_CNT_LVALUE
14a5cf38 3393 PerlSIO_set_cnt(stdio, cnt);
22569500 3394#else /* STDIO_CNT_LVALUE */
9e353e3b 3395#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3396 PerlSIO_set_ptr(stdio,
3397 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3398 cnt));
22569500 3399#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3400 PerlProc_abort();
22569500
NIS
3401#endif /* STDIO_PTR_LVAL_SETS_CNT */
3402#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3403}
3404
93679785 3405
9e353e3b
NIS
3406#endif
3407
93679785
NIS
3408IV
3409PerlIOStdio_fill(pTHX_ PerlIO *f)
3410{
c4420975 3411 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3412 int c;
96a5add6
AL
3413 PERL_UNUSED_CONTEXT;
3414
93679785
NIS
3415 /*
3416 * fflush()ing read-only streams can cause trouble on some stdio-s
3417 */
3418 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3419 if (PerlSIO_fflush(stdio) != 0)
3420 return EOF;
3421 }
f3be3723
BL
3422 for (;;) {
3423 c = PerlSIO_fgetc(stdio);
3424 if (c != EOF)
3425 break;
3426 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3427 return EOF;
3428 PERL_ASYNC_CHECK();
3429 SETERRNO(0,0);
3430 }
93679785
NIS
3431
3432#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3433
3434#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3435 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3436 /* Fake ungetc() to the real buffer in case system's ungetc
3437 goes elsewhere
3438 */
3439 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3440 SSize_t cnt = PerlSIO_get_cnt(stdio);
3441 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3442 if (ptr == base+1) {
3443 *--ptr = (STDCHAR) c;
3444 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3445 if (PerlSIO_feof(stdio))
3446 PerlSIO_clearerr(stdio);
3447 return 0;
3448 }
3449 }
313e59c8
NIS
3450 else
3451#endif
3452 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3453 STDCHAR ch = c;
3454 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3455 return 0;
3456 }
3457 }
93679785
NIS
3458#endif
3459
3460#if defined(VMS)
3461 /* An ungetc()d char is handled separately from the regular
3462 * buffer, so we stuff it in the buffer ourselves.
3463 * Should never get called as should hit code above
3464 */
bad9695d
NIS
3465 *(--((*stdio)->_ptr)) = (unsigned char) c;
3466 (*stdio)->_cnt++;
93679785
NIS
3467#else
3468 /* If buffer snoop scheme above fails fall back to
9f7cd136 3469 using ungetc().
93679785
NIS
3470 */
3471 if (PerlSIO_ungetc(c, stdio) != c)
3472 return EOF;
3473#endif
3474 return 0;
3475}
3476
3477
3478
27da23d5 3479PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3480 sizeof(PerlIO_funcs),
14a5cf38
JH
3481 "stdio",
3482 sizeof(PerlIOStdio),
86e05cf2 3483 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3484 PerlIOStdio_pushed,
44798d05 3485 PerlIOBase_popped,
14a5cf38 3486 PerlIOStdio_open,
86e05cf2 3487 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3488 NULL,
3489 PerlIOStdio_fileno,
71200d45 3490 PerlIOStdio_dup,
14a5cf38
JH
3491 PerlIOStdio_read,
3492 PerlIOStdio_unread,
3493 PerlIOStdio_write,
3494 PerlIOStdio_seek,
3495 PerlIOStdio_tell,
3496 PerlIOStdio_close,
3497 PerlIOStdio_flush,
3498 PerlIOStdio_fill,
3499 PerlIOStdio_eof,
3500 PerlIOStdio_error,
3501 PerlIOStdio_clearerr,
3502 PerlIOStdio_setlinebuf,
9e353e3b 3503#ifdef FILE_base
14a5cf38
JH
3504 PerlIOStdio_get_base,
3505 PerlIOStdio_get_bufsiz,
9e353e3b 3506#else
14a5cf38
JH
3507 NULL,
3508 NULL,
9e353e3b
NIS
3509#endif
3510#ifdef USE_STDIO_PTR
14a5cf38
JH
3511 PerlIOStdio_get_ptr,
3512 PerlIOStdio_get_cnt,
15b61c98 3513# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3514 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3515# else
3516 NULL,
3517# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3518#else
3519 NULL,
14a5cf38
JH
3520 NULL,
3521 NULL,
15b61c98 3522#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3523};
3524
b9d6bf13
JH
3525/* Note that calls to PerlIO_exportFILE() are reversed using
3526 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3527FILE *
81428673 3528PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3529{
e87a358a 3530 dTHX;
81428673
NIS
3531 FILE *stdio = NULL;
3532 if (PerlIOValid(f)) {
3533 char buf[8];
3534 PerlIO_flush(f);
3535 if (!mode || !*mode) {
3536 mode = PerlIO_modestr(f, buf);
3537 }
3538 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3539 if (stdio) {
3540 PerlIOl *l = *f;
9f75cc58 3541 PerlIO *f2;
81428673
NIS
3542 /* De-link any lower layers so new :stdio sticks */
3543 *f = NULL;
a0714e2c 3544 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
9f75cc58 3545 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673
NIS
3546 s->stdio = stdio;
3547 /* Link previous lower layers under new one */
3548 *PerlIONext(f) = l;
3549 }
3550 else {
3551 /* restore layers list */
3552 *f = l;
3553 }
a33cf58c 3554 }
14a5cf38
JH
3555 }
3556 return stdio;
9e353e3b
NIS
3557}
3558
81428673 3559
9e353e3b
NIS
3560FILE *
3561PerlIO_findFILE(PerlIO *f)
3562{
14a5cf38
JH
3563 PerlIOl *l = *f;
3564 while (l) {
3565 if (l->tab == &PerlIO_stdio) {
3566 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3567 return s->stdio;
3568 }
3569 l = *PerlIONext(&l);
f7e7eb72 3570 }
4b069b44 3571 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */