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Fix bug in prime_env_iter where the terms of a comparison were reversed
[perl5.git] / perlio.c
CommitLineData
14a5cf38 1/*
acde74e1 2 * perlio.c Copyright (c) 1996-2006, Nick Ing-Simmons You may distribute
14a5cf38 3 * under the terms of either the GNU General Public License or the
71200d45 4 * Artistic License, as specified in the README file.
760ac839
LW
5 */
6
14a5cf38 7/*
d31a8517
AT
8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
10 */
11
166f8a29
DM
12/* This file contains the functions needed to implement PerlIO, which
13 * is Perl's private replacement for the C stdio library. This is used
14 * by default unless you compile with -Uuseperlio or run with
15 * PERLIO=:stdio (but don't do this unless you know what you're doing)
16 */
17
d31a8517 18/*
71200d45 19 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14a5cf38 20 * at the dispatch tables, even when we do not need it for other reasons.
71200d45 21 * Invent a dSYS macro to abstract this out
14a5cf38 22 */
7bcba3d4
NIS
23#ifdef PERL_IMPLICIT_SYS
24#define dSYS dTHX
25#else
26#define dSYS dNOOP
27#endif
28
760ac839 29#define VOIDUSED 1
12ae5dfc
JH
30#ifdef PERL_MICRO
31# include "uconfig.h"
32#else
33# include "config.h"
34#endif
760ac839 35
6f9d8c32 36#define PERLIO_NOT_STDIO 0
760ac839 37#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
14a5cf38 38/*
71200d45 39 * #define PerlIO FILE
14a5cf38 40 */
760ac839
LW
41#endif
42/*
6f9d8c32 43 * This file provides those parts of PerlIO abstraction
88b61e10 44 * which are not #defined in perlio.h.
6f9d8c32 45 * Which these are depends on various Configure #ifdef's
760ac839
LW
46 */
47
48#include "EXTERN.h"
864dbfa3 49#define PERL_IN_PERLIO_C
760ac839
LW
50#include "perl.h"
51
32af7c23
CL
52#ifdef PERL_IMPLICIT_CONTEXT
53#undef dSYS
54#define dSYS dTHX
55#endif
56
0c4f7ff0
NIS
57#include "XSUB.h"
58
9cffb111
OS
59#ifdef __Lynx__
60/* Missing proto on LynxOS */
61int mkstemp(char*);
62#endif
63
1b7a0411 64/* Call the callback or PerlIOBase, and return failure. */
b32dd47e 65#define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
1b7a0411 66 if (PerlIOValid(f)) { \
46c461b5 67 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
68 if (tab && tab->callback) \
69 return (*tab->callback) args; \
70 else \
71 return PerlIOBase_ ## base args; \
72 } \
73 else \
74 SETERRNO(EBADF, SS_IVCHAN); \
75 return failure
76
77/* Call the callback or fail, and return failure. */
b32dd47e 78#define Perl_PerlIO_or_fail(f, callback, failure, args) \
1b7a0411 79 if (PerlIOValid(f)) { \
46c461b5 80 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
81 if (tab && tab->callback) \
82 return (*tab->callback) args; \
83 SETERRNO(EINVAL, LIB_INVARG); \
84 } \
85 else \
86 SETERRNO(EBADF, SS_IVCHAN); \
87 return failure
88
89/* Call the callback or PerlIOBase, and be void. */
b32dd47e 90#define Perl_PerlIO_or_Base_void(f, callback, base, args) \
1b7a0411 91 if (PerlIOValid(f)) { \
46c461b5 92 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
93 if (tab && tab->callback) \
94 (*tab->callback) args; \
95 else \
96 PerlIOBase_ ## base args; \
1b7a0411
JH
97 } \
98 else \
99 SETERRNO(EBADF, SS_IVCHAN)
100
101/* Call the callback or fail, and be void. */
b32dd47e 102#define Perl_PerlIO_or_fail_void(f, callback, args) \
1b7a0411 103 if (PerlIOValid(f)) { \
46c461b5 104 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
1b7a0411
JH
105 if (tab && tab->callback) \
106 (*tab->callback) args; \
37725cdc
NIS
107 else \
108 SETERRNO(EINVAL, LIB_INVARG); \
1b7a0411
JH
109 } \
110 else \
111 SETERRNO(EBADF, SS_IVCHAN)
112
71ab4674
SP
113#ifndef USE_SFIO
114int
115perlsio_binmode(FILE *fp, int iotype, int mode)
116{
117 /*
118 * This used to be contents of do_binmode in doio.c
119 */
120#ifdef DOSISH
121# if defined(atarist) || defined(__MINT__)
122 if (!fflush(fp)) {
123 if (mode & O_BINARY)
124 ((FILE *) fp)->_flag |= _IOBIN;
125 else
126 ((FILE *) fp)->_flag &= ~_IOBIN;
127 return 1;
128 }
129 return 0;
130# else
131 dTHX;
132#ifdef NETWARE
133 if (PerlLIO_setmode(fp, mode) != -1) {
134#else
135 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
136#endif
137# if defined(WIN32) && defined(__BORLANDC__)
138 /*
139 * The translation mode of the stream is maintained independent
140of
141 * the translation mode of the fd in the Borland RTL (heavy
142 * digging through their runtime sources reveal). User has to
143set
144 * the mode explicitly for the stream (though they don't
145document
146 * this anywhere). GSAR 97-5-24
147 */
148 fseek(fp, 0L, 0);
149 if (mode & O_BINARY)
150 fp->flags |= _F_BIN;
151 else
152 fp->flags &= ~_F_BIN;
153# endif
154 return 1;
155 }
156 else
157 return 0;
158# endif
159#else
160# if defined(USEMYBINMODE)
161 dTHX;
162 if (my_binmode(fp, iotype, mode) != FALSE)
163 return 1;
164 else
165 return 0;
166# else
167 PERL_UNUSED_ARG(fp);
168 PERL_UNUSED_ARG(iotype);
169 PERL_UNUSED_ARG(mode);
170 return 1;
171# endif
172#endif
173}
174#endif /* sfio */
175
06c7082d 176#ifndef O_ACCMODE
22569500 177#define O_ACCMODE 3 /* Assume traditional implementation */
06c7082d
NIS
178#endif
179
180int
181PerlIO_intmode2str(int rawmode, char *mode, int *writing)
182{
de009b76 183 const int result = rawmode & O_ACCMODE;
06c7082d
NIS
184 int ix = 0;
185 int ptype;
186 switch (result) {
187 case O_RDONLY:
188 ptype = IoTYPE_RDONLY;
189 break;
190 case O_WRONLY:
191 ptype = IoTYPE_WRONLY;
192 break;
193 case O_RDWR:
194 default:
195 ptype = IoTYPE_RDWR;
196 break;
197 }
198 if (writing)
199 *writing = (result != O_RDONLY);
200
201 if (result == O_RDONLY) {
202 mode[ix++] = 'r';
203 }
204#ifdef O_APPEND
205 else if (rawmode & O_APPEND) {
206 mode[ix++] = 'a';
207 if (result != O_WRONLY)
208 mode[ix++] = '+';
209 }
210#endif
211 else {
212 if (result == O_WRONLY)
213 mode[ix++] = 'w';
214 else {
215 mode[ix++] = 'r';
216 mode[ix++] = '+';
217 }
218 }
219 if (rawmode & O_BINARY)
220 mode[ix++] = 'b';
221 mode[ix] = '\0';
222 return ptype;
223}
224
eb73beca
NIS
225#ifndef PERLIO_LAYERS
226int
227PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
228{
6874a2de
NIS
229 if (!names || !*names
230 || strEQ(names, ":crlf")
231 || strEQ(names, ":raw")
232 || strEQ(names, ":bytes")
233 ) {
14a5cf38
JH
234 return 0;
235 }
236 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
237 /*
71200d45 238 * NOTREACHED
14a5cf38
JH
239 */
240 return -1;
eb73beca
NIS
241}
242
13621cfb
NIS
243void
244PerlIO_destruct(pTHX)
245{
246}
247
f5b9d040
NIS
248int
249PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
250{
92bff44d 251#ifdef USE_SFIO
8772537c
AL
252 PERL_UNUSED_ARG(iotype);
253 PERL_UNUSED_ARG(mode);
254 PERL_UNUSED_ARG(names);
14a5cf38 255 return 1;
92bff44d 256#else
14a5cf38 257 return perlsio_binmode(fp, iotype, mode);
92bff44d 258#endif
f5b9d040 259}
60382766 260
e0fa5af2 261PerlIO *
ecdeb87c 262PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
e0fa5af2 263{
a0fd4948 264#if defined(PERL_MICRO) || defined(__SYMBIAN32__)
0553478e
NIS
265 return NULL;
266#else
267#ifdef PERL_IMPLICIT_SYS
22569500 268 return PerlSIO_fdupopen(f);
0553478e 269#else
30753f56
NIS
270#ifdef WIN32
271 return win32_fdupopen(f);
272#else
e0fa5af2 273 if (f) {
504618e9 274 const int fd = PerlLIO_dup(PerlIO_fileno(f));
e0fa5af2 275 if (fd >= 0) {
06c7082d 276 char mode[8];
a5936e02 277#ifdef DJGPP
dcda55fc
AL
278 const int omode = djgpp_get_stream_mode(f);
279#else
280 const int omode = fcntl(fd, F_GETFL);
a5936e02 281#endif
06c7082d 282 PerlIO_intmode2str(omode,mode,NULL);
e0fa5af2 283 /* the r+ is a hack */
06c7082d 284 return PerlIO_fdopen(fd, mode);
e0fa5af2
NIS
285 }
286 return NULL;
287 }
288 else {
93189314 289 SETERRNO(EBADF, SS_IVCHAN);
e0fa5af2 290 }
7114a2d2 291#endif
e0fa5af2 292 return NULL;
0553478e 293#endif
30753f56 294#endif
e0fa5af2
NIS
295}
296
297
14a5cf38 298/*
71200d45 299 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
14a5cf38 300 */
ee518936
NIS
301
302PerlIO *
14a5cf38
JH
303PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
304 int imode, int perm, PerlIO *old, int narg, SV **args)
305{
7cf31beb
NIS
306 if (narg) {
307 if (narg > 1) {
3b8752bb 308 Perl_croak(aTHX_ "More than one argument to open");
7cf31beb 309 }
14a5cf38
JH
310 if (*args == &PL_sv_undef)
311 return PerlIO_tmpfile();
312 else {
e62f0680 313 const char *name = SvPV_nolen_const(*args);
3b6c1aba 314 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
315 fd = PerlLIO_open3(name, imode, perm);
316 if (fd >= 0)
de009b76 317 return PerlIO_fdopen(fd, mode + 1);
14a5cf38
JH
318 }
319 else if (old) {
320 return PerlIO_reopen(name, mode, old);
321 }
322 else {
323 return PerlIO_open(name, mode);
324 }
325 }
326 }
327 else {
328 return PerlIO_fdopen(fd, (char *) mode);
329 }
330 return NULL;
ee518936
NIS
331}
332
0c4f7ff0
NIS
333XS(XS_PerlIO__Layer__find)
334{
14a5cf38
JH
335 dXSARGS;
336 if (items < 2)
337 Perl_croak(aTHX_ "Usage class->find(name[,load])");
338 else {
dcda55fc 339 const char * const name = SvPV_nolen_const(ST(1));
14a5cf38
JH
340 ST(0) = (strEQ(name, "crlf")
341 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
342 XSRETURN(1);
343 }
0c4f7ff0
NIS
344}
345
346
347void
348Perl_boot_core_PerlIO(pTHX)
349{
14a5cf38 350 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
0c4f7ff0
NIS
351}
352
ac27b0f5
NIS
353#endif
354
32e30700 355
6f9d8c32 356#ifdef PERLIO_IS_STDIO
760ac839
LW
357
358void
e8632036 359PerlIO_init(pTHX)
760ac839 360{
96a5add6 361 PERL_UNUSED_CONTEXT;
14a5cf38
JH
362 /*
363 * Does nothing (yet) except force this file to be included in perl
71200d45 364 * binary. That allows this file to force inclusion of other functions
14a5cf38 365 * that may be required by loadable extensions e.g. for
71200d45 366 * FileHandle::tmpfile
14a5cf38 367 */
760ac839
LW
368}
369
33dcbb9a
PP
370#undef PerlIO_tmpfile
371PerlIO *
8ac85365 372PerlIO_tmpfile(void)
33dcbb9a 373{
14a5cf38 374 return tmpfile();
33dcbb9a
PP
375}
376
22569500 377#else /* PERLIO_IS_STDIO */
760ac839
LW
378
379#ifdef USE_SFIO
380
381#undef HAS_FSETPOS
382#undef HAS_FGETPOS
383
14a5cf38
JH
384/*
385 * This section is just to make sure these functions get pulled in from
71200d45 386 * libsfio.a
14a5cf38 387 */
760ac839
LW
388
389#undef PerlIO_tmpfile
390PerlIO *
c78749f2 391PerlIO_tmpfile(void)
760ac839 392{
14a5cf38 393 return sftmp(0);
760ac839
LW
394}
395
396void
e8632036 397PerlIO_init(pTHX)
760ac839 398{
96a5add6 399 PERL_UNUSED_CONTEXT;
14a5cf38
JH
400 /*
401 * Force this file to be included in perl binary. Which allows this
402 * file to force inclusion of other functions that may be required by
71200d45 403 * loadable extensions e.g. for FileHandle::tmpfile
14a5cf38 404 */
760ac839 405
14a5cf38 406 /*
71200d45 407 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
14a5cf38 408 * results in a lot of lseek()s to regular files and lot of small
71200d45 409 * writes to pipes.
14a5cf38
JH
410 */
411 sfset(sfstdout, SF_SHARE, 0);
760ac839
LW
412}
413
b9d6bf13 414/* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
92bff44d 415PerlIO *
4b069b44 416PerlIO_importFILE(FILE *stdio, const char *mode)
92bff44d 417{
de009b76 418 const int fd = fileno(stdio);
4b069b44 419 if (!mode || !*mode) {
81428673 420 mode = "r+";
4b069b44
NIS
421 }
422 return PerlIO_fdopen(fd, mode);
92bff44d
NIS
423}
424
425FILE *
426PerlIO_findFILE(PerlIO *pio)
427{
de009b76
AL
428 const int fd = PerlIO_fileno(pio);
429 FILE * const f = fdopen(fd, "r+");
14a5cf38
JH
430 PerlIO_flush(pio);
431 if (!f && errno == EINVAL)
432 f = fdopen(fd, "w");
433 if (!f && errno == EINVAL)
434 f = fdopen(fd, "r");
435 return f;
92bff44d
NIS
436}
437
438
22569500 439#else /* USE_SFIO */
6f9d8c32 440/*======================================================================================*/
14a5cf38 441/*
71200d45 442 * Implement all the PerlIO interface ourselves.
9e353e3b 443 */
760ac839 444
76ced9ad
NIS
445#include "perliol.h"
446
14a5cf38
JH
447/*
448 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
71200d45 449 * files
14a5cf38 450 */
02f66e2f
NIS
451#ifdef I_UNISTD
452#include <unistd.h>
453#endif
06da4f11
NIS
454#ifdef HAS_MMAP
455#include <sys/mman.h>
456#endif
457
6f9d8c32 458void
14a5cf38
JH
459PerlIO_debug(const char *fmt, ...)
460{
14a5cf38
JH
461 va_list ap;
462 dSYS;
463 va_start(ap, fmt);
27da23d5 464 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
dcda55fc 465 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
14a5cf38 466 if (s && *s)
27da23d5 467 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
14a5cf38 468 else
27da23d5 469 PL_perlio_debug_fd = -1;
14a5cf38 470 }
27da23d5 471 if (PL_perlio_debug_fd > 0) {
14a5cf38 472 dTHX;
70ace5da 473#ifdef USE_ITHREADS
dcda55fc 474 const char * const s = CopFILE(PL_curcop);
70ace5da
NIS
475 /* Use fixed buffer as sv_catpvf etc. needs SVs */
476 char buffer[1024];
dcda55fc 477 const STRLEN len = my_sprintf(buffer, "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
42d9b98d
NC
478 const STRLEN len2 = vsprintf(buffer+len, fmt, ap);
479 PerlLIO_write(PL_perlio_debug_fd, buffer, len + len2);
70ace5da 480#else
dcda55fc
AL
481 const char *s = CopFILE(PL_curcop);
482 STRLEN len;
396482e1 483 SV * const sv = newSVpvs("");
dcda55fc 484 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
14a5cf38
JH
485 (IV) CopLINE(PL_curcop));
486 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
487
b83604b4 488 s = SvPV_const(sv, len);
27da23d5 489 PerlLIO_write(PL_perlio_debug_fd, s, len);
14a5cf38 490 SvREFCNT_dec(sv);
70ace5da 491#endif
14a5cf38
JH
492 }
493 va_end(ap);
6f9d8c32
NIS
494}
495
9e353e3b
NIS
496/*--------------------------------------------------------------------------------------*/
497
14a5cf38 498/*
71200d45 499 * Inner level routines
14a5cf38 500 */
9e353e3b 501
14a5cf38 502/*
71200d45 503 * Table of pointers to the PerlIO structs (malloc'ed)
14a5cf38 504 */
05d1247b 505#define PERLIO_TABLE_SIZE 64
6f9d8c32 506
760ac839 507PerlIO *
5f1a76d0 508PerlIO_allocate(pTHX)
6f9d8c32 509{
97aff369 510 dVAR;
14a5cf38 511 /*
71200d45 512 * Find a free slot in the table, allocating new table as necessary
14a5cf38
JH
513 */
514 PerlIO **last;
515 PerlIO *f;
a1ea730d 516 last = &PL_perlio;
14a5cf38
JH
517 while ((f = *last)) {
518 int i;
519 last = (PerlIO **) (f);
520 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
521 if (!*++f) {
522 return f;
523 }
524 }
525 }
a02a5408 526 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
14a5cf38
JH
527 if (!f) {
528 return NULL;
529 }
530 *last = f;
531 return f + 1;
05d1247b
NIS
532}
533
a1ea730d
NIS
534#undef PerlIO_fdupopen
535PerlIO *
ecdeb87c 536PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
a1ea730d 537{
04892f78 538 if (PerlIOValid(f)) {
de009b76 539 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
fe5a182c 540 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
210e727c
JH
541 if (tab && tab->Dup)
542 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
37725cdc
NIS
543 else {
544 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
545 }
a1ea730d 546 }
210e727c
JH
547 else
548 SETERRNO(EBADF, SS_IVCHAN);
549
550 return NULL;
a1ea730d
NIS
551}
552
553void
5f1a76d0 554PerlIO_cleantable(pTHX_ PerlIO **tablep)
05d1247b 555{
dcda55fc 556 PerlIO * const table = *tablep;
14a5cf38
JH
557 if (table) {
558 int i;
559 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
560 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
dcda55fc 561 PerlIO * const f = table + i;
14a5cf38
JH
562 if (*f) {
563 PerlIO_close(f);
564 }
565 }
3a1ee7e8 566 Safefree(table);
14a5cf38 567 *tablep = NULL;
05d1247b 568 }
05d1247b
NIS
569}
570
fcf2db38
NIS
571
572PerlIO_list_t *
3a1ee7e8 573PerlIO_list_alloc(pTHX)
fcf2db38 574{
14a5cf38 575 PerlIO_list_t *list;
96a5add6 576 PERL_UNUSED_CONTEXT;
a02a5408 577 Newxz(list, 1, PerlIO_list_t);
14a5cf38
JH
578 list->refcnt = 1;
579 return list;
fcf2db38
NIS
580}
581
582void
3a1ee7e8 583PerlIO_list_free(pTHX_ PerlIO_list_t *list)
fcf2db38 584{
14a5cf38
JH
585 if (list) {
586 if (--list->refcnt == 0) {
587 if (list->array) {
14a5cf38
JH
588 IV i;
589 for (i = 0; i < list->cur; i++) {
590 if (list->array[i].arg)
591 SvREFCNT_dec(list->array[i].arg);
592 }
593 Safefree(list->array);
594 }
595 Safefree(list);
596 }
597 }
fcf2db38
NIS
598}
599
600void
3a1ee7e8 601PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
14a5cf38 602{
97aff369 603 dVAR;
334e202e 604 PerlIO_pair_t *p;
b37c2d43
AL
605 PERL_UNUSED_CONTEXT;
606
14a5cf38
JH
607 if (list->cur >= list->len) {
608 list->len += 8;
609 if (list->array)
610 Renew(list->array, list->len, PerlIO_pair_t);
611 else
a02a5408 612 Newx(list->array, list->len, PerlIO_pair_t);
14a5cf38
JH
613 }
614 p = &(list->array[list->cur++]);
615 p->funcs = funcs;
616 if ((p->arg = arg)) {
f84c484e 617 SvREFCNT_inc_simple_void_NN(arg);
14a5cf38 618 }
fcf2db38
NIS
619}
620
3a1ee7e8
NIS
621PerlIO_list_t *
622PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
623{
b37c2d43 624 PerlIO_list_t *list = NULL;
694c95cf
JH
625 if (proto) {
626 int i;
627 list = PerlIO_list_alloc(aTHX);
628 for (i=0; i < proto->cur; i++) {
a0714e2c 629 SV *arg = NULL;
694c95cf
JH
630 if (proto->array[i].arg)
631 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
632 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
633 }
3a1ee7e8
NIS
634 }
635 return list;
636}
4a4a6116 637
05d1247b 638void
3a1ee7e8 639PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
9a6404c5 640{
3aaf42a7 641#ifdef USE_ITHREADS
3a1ee7e8
NIS
642 PerlIO **table = &proto->Iperlio;
643 PerlIO *f;
644 PL_perlio = NULL;
645 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
646 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
647 PerlIO_allocate(aTHX); /* root slot is never used */
694c95cf 648 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
3a1ee7e8
NIS
649 while ((f = *table)) {
650 int i;
651 table = (PerlIO **) (f++);
652 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
653 if (*f) {
93a8090d 654 (void) fp_dup(f, 0, param);
3a1ee7e8
NIS
655 }
656 f++;
657 }
658 }
1b6737cc
AL
659#else
660 PERL_UNUSED_ARG(proto);
661 PERL_UNUSED_ARG(param);
3aaf42a7 662#endif
9a6404c5
DM
663}
664
665void
13621cfb
NIS
666PerlIO_destruct(pTHX)
667{
97aff369 668 dVAR;
a1ea730d 669 PerlIO **table = &PL_perlio;
14a5cf38 670 PerlIO *f;
694c95cf
JH
671#ifdef USE_ITHREADS
672 PerlIO_debug("Destruct %p\n",aTHX);
673#endif
14a5cf38
JH
674 while ((f = *table)) {
675 int i;
676 table = (PerlIO **) (f++);
677 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
678 PerlIO *x = f;
dcda55fc 679 const PerlIOl *l;
14a5cf38
JH
680 while ((l = *x)) {
681 if (l->tab->kind & PERLIO_K_DESTRUCT) {
682 PerlIO_debug("Destruct popping %s\n", l->tab->name);
683 PerlIO_flush(x);
684 PerlIO_pop(aTHX_ x);
685 }
686 else {
687 x = PerlIONext(x);
688 }
689 }
690 f++;
691 }
692 }
13621cfb
NIS
693}
694
695void
a999f61b 696PerlIO_pop(pTHX_ PerlIO *f)
760ac839 697{
dcda55fc 698 const PerlIOl *l = *f;
14a5cf38 699 if (l) {
fe5a182c 700 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
14a5cf38
JH
701 if (l->tab->Popped) {
702 /*
703 * If popped returns non-zero do not free its layer structure
704 * it has either done so itself, or it is shared and still in
71200d45 705 * use
14a5cf38 706 */
f62ce20a 707 if ((*l->tab->Popped) (aTHX_ f) != 0)
14a5cf38
JH
708 return;
709 }
b47cad08 710 *f = l->next;
3a1ee7e8 711 Safefree(l);
a8c08ecd 712 }
6f9d8c32
NIS
713}
714
39f7a870
JH
715/* Return as an array the stack of layers on a filehandle. Note that
716 * the stack is returned top-first in the array, and there are three
717 * times as many array elements as there are layers in the stack: the
718 * first element of a layer triplet is the name, the second one is the
719 * arguments, and the third one is the flags. */
720
721AV *
722PerlIO_get_layers(pTHX_ PerlIO *f)
723{
97aff369 724 dVAR;
dcda55fc 725 AV * const av = newAV();
39f7a870 726
dcda55fc
AL
727 if (PerlIOValid(f)) {
728 PerlIOl *l = PerlIOBase(f);
729
730 while (l) {
731 SV * const name = l->tab && l->tab->name ?
732 newSVpv(l->tab->name, 0) : &PL_sv_undef;
733 SV * const arg = l->tab && l->tab->Getarg ?
734 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
735 av_push(av, name);
736 av_push(av, arg);
737 av_push(av, newSViv((IV)l->flags));
738 l = l->next;
739 }
740 }
39f7a870 741
dcda55fc 742 return av;
39f7a870
JH
743}
744
9e353e3b 745/*--------------------------------------------------------------------------------------*/
14a5cf38 746/*
71200d45 747 * XS Interface for perl code
14a5cf38 748 */
9e353e3b 749
fcf2db38 750PerlIO_funcs *
2edd7e44 751PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
f3862f8b 752{
27da23d5 753 dVAR;
14a5cf38
JH
754 IV i;
755 if ((SSize_t) len <= 0)
756 len = strlen(name);
3a1ee7e8 757 for (i = 0; i < PL_known_layers->cur; i++) {
46c461b5 758 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
a9f76400 759 if (memEQ(f->name, name, len) && f->name[len] == 0) {
fe5a182c 760 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
14a5cf38
JH
761 return f;
762 }
763 }
3a1ee7e8
NIS
764 if (load && PL_subname && PL_def_layerlist
765 && PL_def_layerlist->cur >= 2) {
d7a09b41
SR
766 if (PL_in_load_module) {
767 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
768 return NULL;
769 } else {
396482e1 770 SV * const pkgsv = newSVpvs("PerlIO");
46c461b5
AL
771 SV * const layer = newSVpvn(name, len);
772 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
773 ENTER;
d7a09b41 774 SAVEINT(PL_in_load_module);
c9bca74a 775 if (cv) {
9cfa90c0 776 SAVEGENERICSV(PL_warnhook);
b37c2d43 777 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
c9bca74a 778 }
d7a09b41
SR
779 PL_in_load_module++;
780 /*
781 * The two SVs are magically freed by load_module
782 */
a0714e2c 783 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
d7a09b41
SR
784 PL_in_load_module--;
785 LEAVE;
786 return PerlIO_find_layer(aTHX_ name, len, 0);
787 }
14a5cf38
JH
788 }
789 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
790 return NULL;
f3862f8b
NIS
791}
792
2a1bc955 793#ifdef USE_ATTRIBUTES_FOR_PERLIO
b13b2135
NIS
794
795static int
796perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
797{
14a5cf38 798 if (SvROK(sv)) {
dcda55fc
AL
799 IO * const io = GvIOn((GV *) SvRV(sv));
800 PerlIO * const ifp = IoIFP(io);
801 PerlIO * const ofp = IoOFP(io);
14a5cf38
JH
802 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
803 }
804 return 0;
b13b2135
NIS
805}
806
807static int
808perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
809{
14a5cf38 810 if (SvROK(sv)) {
dcda55fc
AL
811 IO * const io = GvIOn((GV *) SvRV(sv));
812 PerlIO * const ifp = IoIFP(io);
813 PerlIO * const ofp = IoOFP(io);
14a5cf38
JH
814 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
815 }
816 return 0;
b13b2135
NIS
817}
818
819static int
820perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
821{
14a5cf38
JH
822 Perl_warn(aTHX_ "clear %" SVf, sv);
823 return 0;
b13b2135
NIS
824}
825
826static int
827perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
828{
14a5cf38
JH
829 Perl_warn(aTHX_ "free %" SVf, sv);
830 return 0;
b13b2135
NIS
831}
832
833MGVTBL perlio_vtab = {
14a5cf38
JH
834 perlio_mg_get,
835 perlio_mg_set,
22569500 836 NULL, /* len */
14a5cf38
JH
837 perlio_mg_clear,
838 perlio_mg_free
b13b2135
NIS
839};
840
841XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
842{
14a5cf38 843 dXSARGS;
dcda55fc
AL
844 SV * const sv = SvRV(ST(1));
845 AV * const av = newAV();
14a5cf38
JH
846 MAGIC *mg;
847 int count = 0;
848 int i;
849 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
850 SvRMAGICAL_off(sv);
851 mg = mg_find(sv, PERL_MAGIC_ext);
852 mg->mg_virtual = &perlio_vtab;
853 mg_magical(sv);
854 Perl_warn(aTHX_ "attrib %" SVf, sv);
855 for (i = 2; i < items; i++) {
856 STRLEN len;
dcda55fc
AL
857 const char * const name = SvPV_const(ST(i), len);
858 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
14a5cf38 859 if (layer) {
b37c2d43 860 av_push(av, SvREFCNT_inc_simple_NN(layer));
14a5cf38
JH
861 }
862 else {
863 ST(count) = ST(i);
864 count++;
865 }
866 }
867 SvREFCNT_dec(av);
868 XSRETURN(count);
869}
870
22569500 871#endif /* USE_ATTIBUTES_FOR_PERLIO */
2a1bc955 872
e3f3bf95
NIS
873SV *
874PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
f3862f8b 875{
89529cee 876 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
46c461b5 877 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
14a5cf38 878 return sv;
e3f3bf95
NIS
879}
880
5ca1d77f 881XS(XS_PerlIO__Layer__NoWarnings)
c9bca74a 882{
37725cdc 883 /* This is used as a %SIG{__WARN__} handler to supress warnings
c9bca74a
NIS
884 during loading of layers.
885 */
97aff369 886 dVAR;
c9bca74a
NIS
887 dXSARGS;
888 if (items)
e62f0680 889 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
c9bca74a
NIS
890 XSRETURN(0);
891}
892
5ca1d77f 893XS(XS_PerlIO__Layer__find)
0c4f7ff0 894{
97aff369 895 dVAR;
14a5cf38
JH
896 dXSARGS;
897 if (items < 2)
898 Perl_croak(aTHX_ "Usage class->find(name[,load])");
899 else {
de009b76 900 STRLEN len;
46c461b5 901 const char * const name = SvPV_const(ST(1), len);
de009b76 902 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
46c461b5 903 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
14a5cf38
JH
904 ST(0) =
905 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
906 &PL_sv_undef;
907 XSRETURN(1);
908 }
0c4f7ff0
NIS
909}
910
e3f3bf95
NIS
911void
912PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
913{
97aff369 914 dVAR;
3a1ee7e8
NIS
915 if (!PL_known_layers)
916 PL_known_layers = PerlIO_list_alloc(aTHX);
a0714e2c 917 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
fe5a182c 918 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
f3862f8b
NIS
919}
920
1141d9f8 921int
fcf2db38 922PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
1141d9f8 923{
97aff369 924 dVAR;
14a5cf38
JH
925 if (names) {
926 const char *s = names;
927 while (*s) {
928 while (isSPACE(*s) || *s == ':')
929 s++;
930 if (*s) {
931 STRLEN llen = 0;
932 const char *e = s;
bd61b366 933 const char *as = NULL;
14a5cf38
JH
934 STRLEN alen = 0;
935 if (!isIDFIRST(*s)) {
936 /*
937 * Message is consistent with how attribute lists are
938 * passed. Even though this means "foo : : bar" is
71200d45 939 * seen as an invalid separator character.
14a5cf38 940 */
de009b76 941 const char q = ((*s == '\'') ? '"' : '\'');
99ef548b 942 if (ckWARN(WARN_LAYER))
22569500 943 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 944 "Invalid separator character %c%c%c in PerlIO layer specification %s",
1e616cf5 945 q, *s, q, s);
93189314 946 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
947 return -1;
948 }
949 do {
950 e++;
951 } while (isALNUM(*e));
952 llen = e - s;
953 if (*e == '(') {
954 int nesting = 1;
955 as = ++e;
956 while (nesting) {
957 switch (*e++) {
958 case ')':
959 if (--nesting == 0)
960 alen = (e - 1) - as;
961 break;
962 case '(':
963 ++nesting;
964 break;
965 case '\\':
966 /*
967 * It's a nul terminated string, not allowed
968 * to \ the terminating null. Anything other
71200d45 969 * character is passed over.
14a5cf38
JH
970 */
971 if (*e++) {
972 break;
973 }
974 /*
71200d45 975 * Drop through
14a5cf38
JH
976 */
977 case '\0':
978 e--;
22569500
NIS
979 if (ckWARN(WARN_LAYER))
980 Perl_warner(aTHX_ packWARN(WARN_LAYER),
b4581f09 981 "Argument list not closed for PerlIO layer \"%.*s\"",
14a5cf38
JH
982 (int) (e - s), s);
983 return -1;
984 default:
985 /*
71200d45 986 * boring.
14a5cf38
JH
987 */
988 break;
989 }
990 }
991 }
992 if (e > s) {
46c461b5 993 PerlIO_funcs * const layer =
14a5cf38
JH
994 PerlIO_find_layer(aTHX_ s, llen, 1);
995 if (layer) {
3a1ee7e8 996 PerlIO_list_push(aTHX_ av, layer,
14a5cf38
JH
997 (as) ? newSVpvn(as,
998 alen) :
999 &PL_sv_undef);
1000 }
1001 else {
041457d9 1002 if (ckWARN(WARN_LAYER))
b4581f09 1003 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
14a5cf38
JH
1004 (int) llen, s);
1005 return -1;
1006 }
1007 }
1008 s = e;
1009 }
1010 }
1011 }
1012 return 0;
1141d9f8
NIS
1013}
1014
dfebf958 1015void
fcf2db38 1016PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
dfebf958 1017{
97aff369 1018 dVAR;
27da23d5 1019 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
35990314 1020#ifdef PERLIO_USING_CRLF
6ce75a77 1021 tab = &PerlIO_crlf;
846be114 1022#else
6ce75a77 1023 if (PerlIO_stdio.Set_ptrcnt)
22569500 1024 tab = &PerlIO_stdio;
846be114 1025#endif
14a5cf38 1026 PerlIO_debug("Pushing %s\n", tab->name);
3a1ee7e8 1027 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
14a5cf38 1028 &PL_sv_undef);
dfebf958
NIS
1029}
1030
e3f3bf95 1031SV *
14a5cf38 1032PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
e3f3bf95 1033{
14a5cf38 1034 return av->array[n].arg;
e3f3bf95
NIS
1035}
1036
f3862f8b 1037PerlIO_funcs *
14a5cf38 1038PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
f3862f8b 1039{
14a5cf38
JH
1040 if (n >= 0 && n < av->cur) {
1041 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1042 av->array[n].funcs->name);
1043 return av->array[n].funcs;
1044 }
1045 if (!def)
1046 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1047 return def;
e3f3bf95
NIS
1048}
1049
4ec2216f
NIS
1050IV
1051PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1052{
8772537c
AL
1053 PERL_UNUSED_ARG(mode);
1054 PERL_UNUSED_ARG(arg);
1055 PERL_UNUSED_ARG(tab);
4ec2216f
NIS
1056 if (PerlIOValid(f)) {
1057 PerlIO_flush(f);
1058 PerlIO_pop(aTHX_ f);
1059 return 0;
1060 }
1061 return -1;
1062}
1063
27da23d5 1064PERLIO_FUNCS_DECL(PerlIO_remove) = {
4ec2216f
NIS
1065 sizeof(PerlIO_funcs),
1066 "pop",
1067 0,
1068 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1069 PerlIOPop_pushed,
1070 NULL,
1071 NULL,
1072 NULL,
1073 NULL,
1074 NULL,
1075 NULL,
1076 NULL,
1077 NULL,
1078 NULL,
1079 NULL,
de009b76
AL
1080 NULL,
1081 NULL,
4ec2216f
NIS
1082 NULL, /* flush */
1083 NULL, /* fill */
1084 NULL,
1085 NULL,
1086 NULL,
1087 NULL,
1088 NULL, /* get_base */
1089 NULL, /* get_bufsiz */
1090 NULL, /* get_ptr */
1091 NULL, /* get_cnt */
1092 NULL, /* set_ptrcnt */
1093};
1094
fcf2db38 1095PerlIO_list_t *
e3f3bf95
NIS
1096PerlIO_default_layers(pTHX)
1097{
97aff369 1098 dVAR;
3a1ee7e8 1099 if (!PL_def_layerlist) {
bd61b366 1100 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
27da23d5 1101 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
3a1ee7e8 1102 PL_def_layerlist = PerlIO_list_alloc(aTHX);
27da23d5 1103 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
979e2c82 1104#if defined(WIN32)
27da23d5 1105 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
2f8118af 1106#if 0
14a5cf38 1107 osLayer = &PerlIO_win32;
0c4128ad 1108#endif
2f8118af 1109#endif
27da23d5
JH
1110 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1111 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1112 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1113 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
06da4f11 1114#ifdef HAS_MMAP
27da23d5 1115 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
06da4f11 1116#endif
27da23d5
JH
1117 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1118 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1119 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
3a1ee7e8 1120 PerlIO_list_push(aTHX_ PL_def_layerlist,
14a5cf38
JH
1121 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1122 &PL_sv_undef);
1123 if (s) {
3a1ee7e8 1124 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
14a5cf38
JH
1125 }
1126 else {
3a1ee7e8 1127 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
14a5cf38 1128 }
1141d9f8 1129 }
3a1ee7e8
NIS
1130 if (PL_def_layerlist->cur < 2) {
1131 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
f3862f8b 1132 }
3a1ee7e8 1133 return PL_def_layerlist;
e3f3bf95
NIS
1134}
1135
0c4f7ff0
NIS
1136void
1137Perl_boot_core_PerlIO(pTHX)
1138{
1139#ifdef USE_ATTRIBUTES_FOR_PERLIO
14a5cf38
JH
1140 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1141 __FILE__);
0c4f7ff0 1142#endif
14a5cf38 1143 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
c9bca74a 1144 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
0c4f7ff0 1145}
e3f3bf95
NIS
1146
1147PerlIO_funcs *
1148PerlIO_default_layer(pTHX_ I32 n)
1149{
97aff369 1150 dVAR;
46c461b5 1151 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
14a5cf38
JH
1152 if (n < 0)
1153 n += av->cur;
27da23d5 1154 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
f3862f8b
NIS
1155}
1156
a999f61b
NIS
1157#define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1158#define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
60382766
NIS
1159
1160void
1141d9f8 1161PerlIO_stdstreams(pTHX)
60382766 1162{
97aff369 1163 dVAR;
a1ea730d 1164 if (!PL_perlio) {
14a5cf38
JH
1165 PerlIO_allocate(aTHX);
1166 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1167 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1168 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1169 }
60382766
NIS
1170}
1171
1172PerlIO *
27da23d5 1173PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
14a5cf38 1174{
2dc2558e
NIS
1175 if (tab->fsize != sizeof(PerlIO_funcs)) {
1176 mismatch:
1177 Perl_croak(aTHX_ "Layer does not match this perl");
1178 }
1179 if (tab->size) {
b464bac0 1180 PerlIOl *l;
2dc2558e
NIS
1181 if (tab->size < sizeof(PerlIOl)) {
1182 goto mismatch;
1183 }
1184 /* Real layer with a data area */
a02a5408 1185 Newxc(l,tab->size,char,PerlIOl);
2dc2558e
NIS
1186 if (l && f) {
1187 Zero(l, tab->size, char);
1188 l->next = *f;
27da23d5 1189 l->tab = (PerlIO_funcs*) tab;
2dc2558e
NIS
1190 *f = l;
1191 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1192 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1193 if (*l->tab->Pushed &&
27da23d5 1194 (*l->tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
2dc2558e
NIS
1195 PerlIO_pop(aTHX_ f);
1196 return NULL;
1197 }
1198 }
1199 }
1200 else if (f) {
1201 /* Pseudo-layer where push does its own stack adjust */
00f51856
NIS
1202 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1203 (mode) ? mode : "(Null)", (void*)arg);
210e727c 1204 if (tab->Pushed &&
27da23d5 1205 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
210e727c 1206 return NULL;
14a5cf38
JH
1207 }
1208 }
1209 return f;
60382766
NIS
1210}
1211
dfebf958 1212IV
86e05cf2
NIS
1213PerlIOBase_binmode(pTHX_ PerlIO *f)
1214{
1215 if (PerlIOValid(f)) {
1216 /* Is layer suitable for raw stream ? */
1217 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1218 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1219 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1220 }
1221 else {
1222 /* Not suitable - pop it */
1223 PerlIO_pop(aTHX_ f);
1224 }
1225 return 0;
1226 }
1227 return -1;
1228}
1229
1230IV
2dc2558e 1231PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
dfebf958 1232{
8772537c
AL
1233 PERL_UNUSED_ARG(mode);
1234 PERL_UNUSED_ARG(arg);
1235 PERL_UNUSED_ARG(tab);
86e05cf2 1236
04892f78 1237 if (PerlIOValid(f)) {
86e05cf2 1238 PerlIO *t;
de009b76 1239 const PerlIOl *l;
14a5cf38 1240 PerlIO_flush(f);
86e05cf2
NIS
1241 /*
1242 * Strip all layers that are not suitable for a raw stream
1243 */
1244 t = f;
1245 while (t && (l = *t)) {
1246 if (l->tab->Binmode) {
1247 /* Has a handler - normal case */
1248 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1249 if (*t == l) {
1250 /* Layer still there - move down a layer */
1251 t = PerlIONext(t);
1252 }
1253 }
1254 else {
1255 return -1;
1256 }
14a5cf38
JH
1257 }
1258 else {
86e05cf2
NIS
1259 /* No handler - pop it */
1260 PerlIO_pop(aTHX_ t);
14a5cf38
JH
1261 }
1262 }
86e05cf2
NIS
1263 if (PerlIOValid(f)) {
1264 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1265 return 0;
1266 }
14a5cf38
JH
1267 }
1268 return -1;
dfebf958
NIS
1269}
1270
ac27b0f5 1271int
14a5cf38 1272PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
d9dac8cd 1273 PerlIO_list_t *layers, IV n, IV max)
14a5cf38 1274{
14a5cf38
JH
1275 int code = 0;
1276 while (n < max) {
8772537c 1277 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
14a5cf38
JH
1278 if (tab) {
1279 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1280 code = -1;
1281 break;
1282 }
1283 }
1284 n++;
1285 }
1286 return code;
e3f3bf95
NIS
1287}
1288
1289int
ac27b0f5
NIS
1290PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1291{
14a5cf38 1292 int code = 0;
53f1b6d2 1293 if (f && names) {
8772537c 1294 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
14a5cf38
JH
1295 code = PerlIO_parse_layers(aTHX_ layers, names);
1296 if (code == 0) {
d9dac8cd 1297 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
14a5cf38 1298 }
3a1ee7e8 1299 PerlIO_list_free(aTHX_ layers);
ac27b0f5 1300 }
14a5cf38 1301 return code;
ac27b0f5
NIS
1302}
1303
f3862f8b 1304
60382766 1305/*--------------------------------------------------------------------------------------*/
14a5cf38 1306/*
71200d45 1307 * Given the abstraction above the public API functions
14a5cf38 1308 */
60382766
NIS
1309
1310int
f5b9d040 1311PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
76ced9ad 1312{
68b5363f
PD
1313 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1314 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1315 iotype, mode, (names) ? names : "(Null)");
1316
03c0554d
NIS
1317 if (names) {
1318 /* Do not flush etc. if (e.g.) switching encodings.
1319 if a pushed layer knows it needs to flush lower layers
1320 (for example :unix which is never going to call them)
1321 it can do the flush when it is pushed.
1322 */
1323 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1324 }
1325 else {
86e05cf2 1326 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
35990314 1327#ifdef PERLIO_USING_CRLF
03c0554d
NIS
1328 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1329 O_BINARY so we can look for it in mode.
1330 */
1331 if (!(mode & O_BINARY)) {
1332 /* Text mode */
86e05cf2
NIS
1333 /* FIXME?: Looking down the layer stack seems wrong,
1334 but is a way of reaching past (say) an encoding layer
1335 to flip CRLF-ness of the layer(s) below
1336 */
03c0554d
NIS
1337 while (*f) {
1338 /* Perhaps we should turn on bottom-most aware layer
1339 e.g. Ilya's idea that UNIX TTY could serve
1340 */
1341 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1342 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1343 /* Not in text mode - flush any pending stuff and flip it */
1344 PerlIO_flush(f);
1345 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1346 }
1347 /* Only need to turn it on in one layer so we are done */
1348 return TRUE;
ed53a2bb 1349 }
03c0554d 1350 f = PerlIONext(f);
14a5cf38 1351 }
03c0554d
NIS
1352 /* Not finding a CRLF aware layer presumably means we are binary
1353 which is not what was requested - so we failed
1354 We _could_ push :crlf layer but so could caller
1355 */
1356 return FALSE;
14a5cf38 1357 }
6ce75a77 1358#endif
86e05cf2
NIS
1359 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1360 So code that used to be here is now in PerlIORaw_pushed().
03c0554d 1361 */
a0714e2c 1362 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
14a5cf38 1363 }
f5b9d040
NIS
1364}
1365
f5b9d040 1366int
e87a358a 1367PerlIO__close(pTHX_ PerlIO *f)
f5b9d040 1368{
37725cdc 1369 if (PerlIOValid(f)) {
46c461b5 1370 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
37725cdc
NIS
1371 if (tab && tab->Close)
1372 return (*tab->Close)(aTHX_ f);
1373 else
1374 return PerlIOBase_close(aTHX_ f);
1375 }
14a5cf38 1376 else {
93189314 1377 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1378 return -1;
1379 }
76ced9ad
NIS
1380}
1381
b931b1d9 1382int
e87a358a 1383Perl_PerlIO_close(pTHX_ PerlIO *f)
b931b1d9 1384{
de009b76 1385 const int code = PerlIO__close(aTHX_ f);
37725cdc
NIS
1386 while (PerlIOValid(f)) {
1387 PerlIO_pop(aTHX_ f);
f6c77cf1 1388 }
14a5cf38 1389 return code;
b931b1d9
NIS
1390}
1391
b931b1d9 1392int
e87a358a 1393Perl_PerlIO_fileno(pTHX_ PerlIO *f)
b931b1d9 1394{
97aff369 1395 dVAR;
b32dd47e 1396 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
b931b1d9
NIS
1397}
1398
1141d9f8
NIS
1399static const char *
1400PerlIO_context_layers(pTHX_ const char *mode)
1401{
97aff369 1402 dVAR;
14a5cf38
JH
1403 const char *type = NULL;
1404 /*
71200d45 1405 * Need to supply default layer info from open.pm
14a5cf38
JH
1406 */
1407 if (PL_curcop) {
dcda55fc 1408 SV * const layers = PL_curcop->cop_io;
14a5cf38
JH
1409 if (layers) {
1410 STRLEN len;
b83604b4 1411 type = SvPV_const(layers, len);
14a5cf38
JH
1412 if (type && mode[0] != 'r') {
1413 /*
71200d45 1414 * Skip to write part
14a5cf38 1415 */
dcda55fc 1416 const char * const s = strchr(type, 0);
eb160463 1417 if (s && (STRLEN)(s - type) < len) {
14a5cf38
JH
1418 type = s + 1;
1419 }
1420 }
1421 }
1422 }
1423 return type;
1141d9f8
NIS
1424}
1425
fcf2db38 1426static PerlIO_funcs *
2edd7e44
NIS
1427PerlIO_layer_from_ref(pTHX_ SV *sv)
1428{
97aff369 1429 dVAR;
14a5cf38 1430 /*
71200d45 1431 * For any scalar type load the handler which is bundled with perl
14a5cf38
JH
1432 */
1433 if (SvTYPE(sv) < SVt_PVAV)
6a245ed1 1434 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
14a5cf38
JH
1435
1436 /*
71200d45 1437 * For other types allow if layer is known but don't try and load it
14a5cf38
JH
1438 */
1439 switch (SvTYPE(sv)) {
1440 case SVt_PVAV:
6a245ed1 1441 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
14a5cf38 1442 case SVt_PVHV:
6a245ed1 1443 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
14a5cf38 1444 case SVt_PVCV:
6a245ed1 1445 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
14a5cf38 1446 case SVt_PVGV:
6a245ed1 1447 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
14a5cf38
JH
1448 }
1449 return NULL;
2edd7e44
NIS
1450}
1451
fcf2db38 1452PerlIO_list_t *
14a5cf38
JH
1453PerlIO_resolve_layers(pTHX_ const char *layers,
1454 const char *mode, int narg, SV **args)
1455{
97aff369 1456 dVAR;
14a5cf38
JH
1457 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1458 int incdef = 1;
a1ea730d 1459 if (!PL_perlio)
14a5cf38
JH
1460 PerlIO_stdstreams(aTHX);
1461 if (narg) {
dcda55fc 1462 SV * const arg = *args;
14a5cf38 1463 /*
71200d45
NIS
1464 * If it is a reference but not an object see if we have a handler
1465 * for it
14a5cf38
JH
1466 */
1467 if (SvROK(arg) && !sv_isobject(arg)) {
46c461b5 1468 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
14a5cf38 1469 if (handler) {
3a1ee7e8
NIS
1470 def = PerlIO_list_alloc(aTHX);
1471 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
14a5cf38
JH
1472 incdef = 0;
1473 }
1474 /*
e934609f 1475 * Don't fail if handler cannot be found :via(...) etc. may do
14a5cf38 1476 * something sensible else we will just stringfy and open
71200d45 1477 * resulting string.
14a5cf38
JH
1478 */
1479 }
1480 }
9fe371da 1481 if (!layers || !*layers)
14a5cf38
JH
1482 layers = PerlIO_context_layers(aTHX_ mode);
1483 if (layers && *layers) {
1484 PerlIO_list_t *av;
1485 if (incdef) {
de009b76 1486 IV i;
3a1ee7e8 1487 av = PerlIO_list_alloc(aTHX);
14a5cf38 1488 for (i = 0; i < def->cur; i++) {
3a1ee7e8 1489 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
14a5cf38
JH
1490 def->array[i].arg);
1491 }
1492 }
1493 else {
1494 av = def;
1495 }
0cff2cf3
NIS
1496 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1497 return av;
1498 }
1499 else {
1500 PerlIO_list_free(aTHX_ av);
b37c2d43 1501 return NULL;
0cff2cf3 1502 }
14a5cf38
JH
1503 }
1504 else {
1505 if (incdef)
1506 def->refcnt++;
1507 return def;
1508 }
ee518936
NIS
1509}
1510
1511PerlIO *
14a5cf38
JH
1512PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1513 int imode, int perm, PerlIO *f, int narg, SV **args)
1514{
97aff369 1515 dVAR;
14a5cf38
JH
1516 if (!f && narg == 1 && *args == &PL_sv_undef) {
1517 if ((f = PerlIO_tmpfile())) {
9fe371da 1518 if (!layers || !*layers)
14a5cf38
JH
1519 layers = PerlIO_context_layers(aTHX_ mode);
1520 if (layers && *layers)
1521 PerlIO_apply_layers(aTHX_ f, mode, layers);
1522 }
1523 }
1524 else {
de009b76 1525 PerlIO_list_t *layera;
14a5cf38
JH
1526 IV n;
1527 PerlIO_funcs *tab = NULL;
04892f78 1528 if (PerlIOValid(f)) {
14a5cf38 1529 /*
71200d45
NIS
1530 * This is "reopen" - it is not tested as perl does not use it
1531 * yet
14a5cf38
JH
1532 */
1533 PerlIOl *l = *f;
3a1ee7e8 1534 layera = PerlIO_list_alloc(aTHX);
14a5cf38 1535 while (l) {
46c461b5 1536 SV * const arg = (l->tab->Getarg)
04892f78
NIS
1537 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1538 : &PL_sv_undef;
3a1ee7e8 1539 PerlIO_list_push(aTHX_ layera, l->tab, arg);
14a5cf38
JH
1540 l = *PerlIONext(&l);
1541 }
1542 }
1543 else {
1544 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
0cff2cf3
NIS
1545 if (!layera) {
1546 return NULL;
1547 }
14a5cf38
JH
1548 }
1549 /*
71200d45 1550 * Start at "top" of layer stack
14a5cf38
JH
1551 */
1552 n = layera->cur - 1;
1553 while (n >= 0) {
46c461b5 1554 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
14a5cf38
JH
1555 if (t && t->Open) {
1556 tab = t;
1557 break;
1558 }
1559 n--;
1560 }
1561 if (tab) {
1562 /*
71200d45 1563 * Found that layer 'n' can do opens - call it
14a5cf38 1564 */
7cf31beb 1565 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
3b8752bb 1566 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
7cf31beb 1567 }
14a5cf38 1568 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
355d3743
PD
1569 tab->name, layers ? layers : "(Null)", mode, fd,
1570 imode, perm, (void*)f, narg, (void*)args);
210e727c
JH
1571 if (tab->Open)
1572 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1573 f, narg, args);
1574 else {
1575 SETERRNO(EINVAL, LIB_INVARG);
1576 f = NULL;
1577 }
14a5cf38
JH
1578 if (f) {
1579 if (n + 1 < layera->cur) {
1580 /*
1581 * More layers above the one that we used to open -
71200d45 1582 * apply them now
14a5cf38 1583 */
d9dac8cd
NIS
1584 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1585 /* If pushing layers fails close the file */
1586 PerlIO_close(f);
14a5cf38
JH
1587 f = NULL;
1588 }
1589 }
1590 }
1591 }
3a1ee7e8 1592 PerlIO_list_free(aTHX_ layera);
14a5cf38
JH
1593 }
1594 return f;
ee518936 1595}
b931b1d9
NIS
1596
1597
9e353e3b 1598SSize_t
e87a358a 1599Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
6f9d8c32 1600{
b32dd47e 1601 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1602}
1603
313ca112 1604SSize_t
e87a358a 1605Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1606{
b32dd47e 1607 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1608}
1609
9e353e3b 1610SSize_t
e87a358a 1611Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
760ac839 1612{
b32dd47e 1613 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
760ac839
LW
1614}
1615
6f9d8c32 1616int
e87a358a 1617Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
760ac839 1618{
b32dd47e 1619 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
760ac839
LW
1620}
1621
9e353e3b 1622Off_t
e87a358a 1623Perl_PerlIO_tell(pTHX_ PerlIO *f)
760ac839 1624{
b32dd47e 1625 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
760ac839
LW
1626}
1627
6f9d8c32 1628int
e87a358a 1629Perl_PerlIO_flush(pTHX_ PerlIO *f)
760ac839 1630{
97aff369 1631 dVAR;
14a5cf38
JH
1632 if (f) {
1633 if (*f) {
de009b76 1634 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1b7a0411
JH
1635
1636 if (tab && tab->Flush)
f62ce20a 1637 return (*tab->Flush) (aTHX_ f);
1b7a0411
JH
1638 else
1639 return 0; /* If no Flush defined, silently succeed. */
14a5cf38
JH
1640 }
1641 else {
fe5a182c 1642 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
93189314 1643 SETERRNO(EBADF, SS_IVCHAN);
14a5cf38
JH
1644 return -1;
1645 }
1646 }
1647 else {
1648 /*
1649 * Is it good API design to do flush-all on NULL, a potentially
1650 * errorneous input? Maybe some magical value (PerlIO*
1651 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1652 * things on fflush(NULL), but should we be bound by their design
71200d45 1653 * decisions? --jhi
14a5cf38 1654 */
a1ea730d 1655 PerlIO **table = &PL_perlio;
14a5cf38
JH
1656 int code = 0;
1657 while ((f = *table)) {
1658 int i;
1659 table = (PerlIO **) (f++);
1660 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1661 if (*f && PerlIO_flush(f) != 0)
1662 code = -1;
1663 f++;
1664 }
1665 }
1666 return code;
1667 }
760ac839
LW
1668}
1669
a9c883f6 1670void
f62ce20a 1671PerlIOBase_flush_linebuf(pTHX)
a9c883f6 1672{
97aff369 1673 dVAR;
a1ea730d 1674 PerlIO **table = &PL_perlio;
14a5cf38
JH
1675 PerlIO *f;
1676 while ((f = *table)) {
1677 int i;
1678 table = (PerlIO **) (f++);
1679 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1680 if (*f
1681 && (PerlIOBase(f)->
1682 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1683 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1684 PerlIO_flush(f);
1685 f++;
1686 }
a9c883f6 1687 }
a9c883f6
NIS
1688}
1689
06da4f11 1690int
e87a358a 1691Perl_PerlIO_fill(pTHX_ PerlIO *f)
06da4f11 1692{
b32dd47e 1693 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
06da4f11
NIS
1694}
1695
f3862f8b
NIS
1696int
1697PerlIO_isutf8(PerlIO *f)
1698{
1b7a0411
JH
1699 if (PerlIOValid(f))
1700 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1701 else
1702 SETERRNO(EBADF, SS_IVCHAN);
37725cdc 1703
1b7a0411 1704 return -1;
f3862f8b
NIS
1705}
1706
6f9d8c32 1707int
e87a358a 1708Perl_PerlIO_eof(pTHX_ PerlIO *f)
760ac839 1709{
b32dd47e 1710 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
9e353e3b
NIS
1711}
1712
9e353e3b 1713int
e87a358a 1714Perl_PerlIO_error(pTHX_ PerlIO *f)
9e353e3b 1715{
b32dd47e 1716 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
9e353e3b
NIS
1717}
1718
9e353e3b 1719void
e87a358a 1720Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
9e353e3b 1721{
b32dd47e 1722 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
9e353e3b
NIS
1723}
1724
9e353e3b 1725void
e87a358a 1726Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 1727{
b32dd47e 1728 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
9e353e3b
NIS
1729}
1730
9e353e3b
NIS
1731int
1732PerlIO_has_base(PerlIO *f)
1733{
1b7a0411 1734 if (PerlIOValid(f)) {
46c461b5 1735 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1736
1737 if (tab)
1738 return (tab->Get_base != NULL);
1739 SETERRNO(EINVAL, LIB_INVARG);
1740 }
1741 else
1742 SETERRNO(EBADF, SS_IVCHAN);
1743
1744 return 0;
760ac839
LW
1745}
1746
9e353e3b
NIS
1747int
1748PerlIO_fast_gets(PerlIO *f)
760ac839 1749{
04892f78 1750 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
46c461b5 1751 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1752
1753 if (tab)
1754 return (tab->Set_ptrcnt != NULL);
1755 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1756 }
1b7a0411
JH
1757 else
1758 SETERRNO(EBADF, SS_IVCHAN);
1759
14a5cf38 1760 return 0;
9e353e3b
NIS
1761}
1762
9e353e3b
NIS
1763int
1764PerlIO_has_cntptr(PerlIO *f)
1765{
04892f78 1766 if (PerlIOValid(f)) {
46c461b5 1767 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1768
1769 if (tab)
1770 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1771 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1772 }
1b7a0411
JH
1773 else
1774 SETERRNO(EBADF, SS_IVCHAN);
1775
14a5cf38 1776 return 0;
9e353e3b
NIS
1777}
1778
9e353e3b
NIS
1779int
1780PerlIO_canset_cnt(PerlIO *f)
1781{
04892f78 1782 if (PerlIOValid(f)) {
46c461b5 1783 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1b7a0411
JH
1784
1785 if (tab)
1786 return (tab->Set_ptrcnt != NULL);
1787 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38 1788 }
1b7a0411
JH
1789 else
1790 SETERRNO(EBADF, SS_IVCHAN);
1791
14a5cf38 1792 return 0;
760ac839
LW
1793}
1794
888911fc 1795STDCHAR *
e87a358a 1796Perl_PerlIO_get_base(pTHX_ PerlIO *f)
760ac839 1797{
b32dd47e 1798 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
9e353e3b
NIS
1799}
1800
9e353e3b 1801int
e87a358a 1802Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 1803{
b32dd47e 1804 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
9e353e3b
NIS
1805}
1806
9e353e3b 1807STDCHAR *
e87a358a 1808Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
9e353e3b 1809{
b32dd47e 1810 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
9e353e3b
NIS
1811}
1812
05d1247b 1813int
e87a358a 1814Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
9e353e3b 1815{
b32dd47e 1816 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
9e353e3b
NIS
1817}
1818
9e353e3b 1819void
e87a358a 1820Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
9e353e3b 1821{
b32dd47e 1822 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
9e353e3b
NIS
1823}
1824
9e353e3b 1825void
e87a358a 1826Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
9e353e3b 1827{
b32dd47e 1828 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
9e353e3b
NIS
1829}
1830
4ec2216f 1831
9e353e3b 1832/*--------------------------------------------------------------------------------------*/
14a5cf38 1833/*
71200d45 1834 * utf8 and raw dummy layers
14a5cf38 1835 */
dfebf958 1836
26fb694e 1837IV
2dc2558e 1838PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
26fb694e 1839{
96a5add6 1840 PERL_UNUSED_CONTEXT;
8772537c
AL
1841 PERL_UNUSED_ARG(mode);
1842 PERL_UNUSED_ARG(arg);
00f51856 1843 if (PerlIOValid(f)) {
14a5cf38
JH
1844 if (tab->kind & PERLIO_K_UTF8)
1845 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1846 else
1847 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1848 return 0;
1849 }
1850 return -1;
26fb694e
NIS
1851}
1852
27da23d5 1853PERLIO_FUNCS_DECL(PerlIO_utf8) = {
2dc2558e 1854 sizeof(PerlIO_funcs),
14a5cf38 1855 "utf8",
2dc2558e 1856 0,
6874a2de 1857 PERLIO_K_DUMMY | PERLIO_K_UTF8,
14a5cf38
JH
1858 PerlIOUtf8_pushed,
1859 NULL,
1860 NULL,
1861 NULL,
1862 NULL,
1863 NULL,
1864 NULL,
1865 NULL,
1866 NULL,
1867 NULL,
1868 NULL,
de009b76
AL
1869 NULL,
1870 NULL,
22569500
NIS
1871 NULL, /* flush */
1872 NULL, /* fill */
14a5cf38
JH
1873 NULL,
1874 NULL,
1875 NULL,
1876 NULL,
22569500
NIS
1877 NULL, /* get_base */
1878 NULL, /* get_bufsiz */
1879 NULL, /* get_ptr */
1880 NULL, /* get_cnt */
1881 NULL, /* set_ptrcnt */
26fb694e
NIS
1882};
1883
27da23d5 1884PERLIO_FUNCS_DECL(PerlIO_byte) = {
2dc2558e 1885 sizeof(PerlIO_funcs),
14a5cf38 1886 "bytes",
2dc2558e 1887 0,
14a5cf38
JH
1888 PERLIO_K_DUMMY,
1889 PerlIOUtf8_pushed,
1890 NULL,
1891 NULL,
1892 NULL,
1893 NULL,
1894 NULL,
1895 NULL,
1896 NULL,
1897 NULL,
1898 NULL,
1899 NULL,
de009b76
AL
1900 NULL,
1901 NULL,
22569500
NIS
1902 NULL, /* flush */
1903 NULL, /* fill */
14a5cf38
JH
1904 NULL,
1905 NULL,
1906 NULL,
1907 NULL,
22569500
NIS
1908 NULL, /* get_base */
1909 NULL, /* get_bufsiz */
1910 NULL, /* get_ptr */
1911 NULL, /* get_cnt */
1912 NULL, /* set_ptrcnt */
dfebf958
NIS
1913};
1914
1915PerlIO *
14a5cf38
JH
1916PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1917 IV n, const char *mode, int fd, int imode, int perm,
1918 PerlIO *old, int narg, SV **args)
dfebf958 1919{
8772537c
AL
1920 PerlIO_funcs * const tab = PerlIO_default_btm();
1921 PERL_UNUSED_ARG(self);
210e727c
JH
1922 if (tab && tab->Open)
1923 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1924 old, narg, args);
1925 SETERRNO(EINVAL, LIB_INVARG);
1926 return NULL;
dfebf958
NIS
1927}
1928
27da23d5 1929PERLIO_FUNCS_DECL(PerlIO_raw) = {
2dc2558e 1930 sizeof(PerlIO_funcs),
14a5cf38 1931 "raw",
2dc2558e 1932 0,
14a5cf38
JH
1933 PERLIO_K_DUMMY,
1934 PerlIORaw_pushed,
1935 PerlIOBase_popped,
1936 PerlIORaw_open,
1937 NULL,
1938 NULL,
1939 NULL,
1940 NULL,
1941 NULL,
1942 NULL,
1943 NULL,
1944 NULL,
de009b76
AL
1945 NULL,
1946 NULL,
22569500
NIS
1947 NULL, /* flush */
1948 NULL, /* fill */
14a5cf38
JH
1949 NULL,
1950 NULL,
1951 NULL,
1952 NULL,
22569500
NIS
1953 NULL, /* get_base */
1954 NULL, /* get_bufsiz */
1955 NULL, /* get_ptr */
1956 NULL, /* get_cnt */
1957 NULL, /* set_ptrcnt */
dfebf958
NIS
1958};
1959/*--------------------------------------------------------------------------------------*/
1960/*--------------------------------------------------------------------------------------*/
14a5cf38 1961/*
71200d45 1962 * "Methods" of the "base class"
14a5cf38 1963 */
9e353e3b
NIS
1964
1965IV
f62ce20a 1966PerlIOBase_fileno(pTHX_ PerlIO *f)
9e353e3b 1967{
04892f78 1968 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
9e353e3b
NIS
1969}
1970
f5b9d040 1971char *
81428673 1972PerlIO_modestr(PerlIO * f, char *buf)
14a5cf38
JH
1973{
1974 char *s = buf;
81428673 1975 if (PerlIOValid(f)) {
de009b76 1976 const IV flags = PerlIOBase(f)->flags;
81428673
NIS
1977 if (flags & PERLIO_F_APPEND) {
1978 *s++ = 'a';
1979 if (flags & PERLIO_F_CANREAD) {
1980 *s++ = '+';
1981 }
14a5cf38 1982 }
81428673
NIS
1983 else if (flags & PERLIO_F_CANREAD) {
1984 *s++ = 'r';
1985 if (flags & PERLIO_F_CANWRITE)
1986 *s++ = '+';
1987 }
1988 else if (flags & PERLIO_F_CANWRITE) {
1989 *s++ = 'w';
1990 if (flags & PERLIO_F_CANREAD) {
1991 *s++ = '+';
1992 }
14a5cf38 1993 }
35990314 1994#ifdef PERLIO_USING_CRLF
81428673
NIS
1995 if (!(flags & PERLIO_F_CRLF))
1996 *s++ = 'b';
5f1a76d0 1997#endif
81428673 1998 }
14a5cf38
JH
1999 *s = '\0';
2000 return buf;
f5b9d040
NIS
2001}
2002
81428673 2003
76ced9ad 2004IV
2dc2558e 2005PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
9e353e3b 2006{
de009b76 2007 PerlIOl * const l = PerlIOBase(f);
96a5add6 2008 PERL_UNUSED_CONTEXT;
8772537c 2009 PERL_UNUSED_ARG(arg);
de009b76 2010
14a5cf38
JH
2011 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2012 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2013 if (tab->Set_ptrcnt != NULL)
2014 l->flags |= PERLIO_F_FASTGETS;
2015 if (mode) {
3b6c1aba 2016 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2017 mode++;
2018 switch (*mode++) {
2019 case 'r':
2020 l->flags |= PERLIO_F_CANREAD;
2021 break;
2022 case 'a':
2023 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2024 break;
2025 case 'w':
2026 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2027 break;
2028 default:
93189314 2029 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2030 return -1;
2031 }
2032 while (*mode) {
2033 switch (*mode++) {
2034 case '+':
2035 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2036 break;
2037 case 'b':
2038 l->flags &= ~PERLIO_F_CRLF;
2039 break;
2040 case 't':
2041 l->flags |= PERLIO_F_CRLF;
2042 break;
2043 default:
93189314 2044 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2045 return -1;
2046 }
2047 }
2048 }
2049 else {
2050 if (l->next) {
2051 l->flags |= l->next->flags &
2052 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2053 PERLIO_F_APPEND);
2054 }
2055 }
5e2ab84b 2056#if 0
14a5cf38
JH
2057 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2058 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2059 l->flags, PerlIO_modestr(f, temp));
5e2ab84b 2060#endif
14a5cf38 2061 return 0;
76ced9ad
NIS
2062}
2063
2064IV
f62ce20a 2065PerlIOBase_popped(pTHX_ PerlIO *f)
76ced9ad 2066{
96a5add6 2067 PERL_UNUSED_CONTEXT;
8772537c 2068 PERL_UNUSED_ARG(f);
14a5cf38 2069 return 0;
760ac839
LW
2070}
2071
9e353e3b 2072SSize_t
f62ce20a 2073PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2074{
14a5cf38 2075 /*
71200d45 2076 * Save the position as current head considers it
14a5cf38 2077 */
de009b76 2078 const Off_t old = PerlIO_tell(f);
a0714e2c 2079 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
14a5cf38 2080 PerlIOSelf(f, PerlIOBuf)->posn = old;
de009b76 2081 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
9e353e3b
NIS
2082}
2083
f6c77cf1 2084SSize_t
f62ce20a 2085PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
f6c77cf1 2086{
14a5cf38
JH
2087 STDCHAR *buf = (STDCHAR *) vbuf;
2088 if (f) {
263df5f1
JH
2089 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2090 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2091 SETERRNO(EBADF, SS_IVCHAN);
2092 return 0;
2093 }
14a5cf38 2094 while (count > 0) {
93c2c2ec
IZ
2095 get_cnt:
2096 {
14a5cf38
JH
2097 SSize_t avail = PerlIO_get_cnt(f);
2098 SSize_t take = 0;
2099 if (avail > 0)
eb160463 2100 take = ((SSize_t)count < avail) ? count : avail;
14a5cf38
JH
2101 if (take > 0) {
2102 STDCHAR *ptr = PerlIO_get_ptr(f);
2103 Copy(ptr, buf, take, STDCHAR);
2104 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2105 count -= take;
2106 buf += take;
93c2c2ec
IZ
2107 if (avail == 0) /* set_ptrcnt could have reset avail */
2108 goto get_cnt;
14a5cf38
JH
2109 }
2110 if (count > 0 && avail <= 0) {
2111 if (PerlIO_fill(f) != 0)
2112 break;
2113 }
93c2c2ec 2114 }
14a5cf38
JH
2115 }
2116 return (buf - (STDCHAR *) vbuf);
2117 }
f6c77cf1 2118 return 0;
f6c77cf1
NIS
2119}
2120
9e353e3b 2121IV
f62ce20a 2122PerlIOBase_noop_ok(pTHX_ PerlIO *f)
9e353e3b 2123{
96a5add6 2124 PERL_UNUSED_CONTEXT;
8772537c 2125 PERL_UNUSED_ARG(f);
14a5cf38 2126 return 0;
9e353e3b
NIS
2127}
2128
2129IV
f62ce20a 2130PerlIOBase_noop_fail(pTHX_ PerlIO *f)
06da4f11 2131{
96a5add6 2132 PERL_UNUSED_CONTEXT;
8772537c 2133 PERL_UNUSED_ARG(f);
14a5cf38 2134 return -1;
06da4f11
NIS
2135}
2136
2137IV
f62ce20a 2138PerlIOBase_close(pTHX_ PerlIO *f)
9e353e3b 2139{
37725cdc
NIS
2140 IV code = -1;
2141 if (PerlIOValid(f)) {
2142 PerlIO *n = PerlIONext(f);
2143 code = PerlIO_flush(f);
2144 PerlIOBase(f)->flags &=
2145 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2146 while (PerlIOValid(n)) {
de009b76 2147 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
37725cdc
NIS
2148 if (tab && tab->Close) {
2149 if ((*tab->Close)(aTHX_ n) != 0)
2150 code = -1;
2151 break;
2152 }
2153 else {
2154 PerlIOBase(n)->flags &=
2155 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2156 }
2157 n = PerlIONext(n);
2158 }
2159 }
2160 else {
2161 SETERRNO(EBADF, SS_IVCHAN);
2162 }
14a5cf38 2163 return code;
9e353e3b
NIS
2164}
2165
2166IV
f62ce20a 2167PerlIOBase_eof(pTHX_ PerlIO *f)
9e353e3b 2168{
96a5add6 2169 PERL_UNUSED_CONTEXT;
04892f78 2170 if (PerlIOValid(f)) {
14a5cf38
JH
2171 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2172 }
2173 return 1;
9e353e3b
NIS
2174}
2175
2176IV
f62ce20a 2177PerlIOBase_error(pTHX_ PerlIO *f)
9e353e3b 2178{
96a5add6 2179 PERL_UNUSED_CONTEXT;
04892f78 2180 if (PerlIOValid(f)) {
14a5cf38
JH
2181 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2182 }
2183 return 1;
9e353e3b
NIS
2184}
2185
2186void
f62ce20a 2187PerlIOBase_clearerr(pTHX_ PerlIO *f)
9e353e3b 2188{
04892f78 2189 if (PerlIOValid(f)) {
dcda55fc 2190 PerlIO * const n = PerlIONext(f);
14a5cf38 2191 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
04892f78 2192 if (PerlIOValid(n))
14a5cf38
JH
2193 PerlIO_clearerr(n);
2194 }
9e353e3b
NIS
2195}
2196
2197void
f62ce20a 2198PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 2199{
96a5add6 2200 PERL_UNUSED_CONTEXT;
04892f78 2201 if (PerlIOValid(f)) {
14a5cf38
JH
2202 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2203 }
9e353e3b
NIS
2204}
2205
93a8090d
NIS
2206SV *
2207PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2208{
2209 if (!arg)
a0714e2c 2210 return NULL;
93a8090d
NIS
2211#ifdef sv_dup
2212 if (param) {
2213 return sv_dup(arg, param);
2214 }
2215 else {
2216 return newSVsv(arg);
2217 }
2218#else
1b6737cc 2219 PERL_UNUSED_ARG(param);
93a8090d
NIS
2220 return newSVsv(arg);
2221#endif
2222}
2223
2224PerlIO *
ecdeb87c 2225PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
93a8090d 2226{
1b6737cc 2227 PerlIO * const nexto = PerlIONext(o);
04892f78 2228 if (PerlIOValid(nexto)) {
de009b76 2229 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
37725cdc
NIS
2230 if (tab && tab->Dup)
2231 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2232 else
2233 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
93a8090d
NIS
2234 }
2235 if (f) {
dcda55fc 2236 PerlIO_funcs * const self = PerlIOBase(o)->tab;
210e727c 2237 SV *arg;
93a8090d 2238 char buf[8];
fe5a182c
JH
2239 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2240 self->name, (void*)f, (void*)o, (void*)param);
210e727c
JH
2241 if (self->Getarg)
2242 arg = (*self->Getarg)(aTHX_ o, param, flags);
2243 else {
a0714e2c 2244 arg = NULL;
93a8090d
NIS
2245 }
2246 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
ecdeb87c 2247 if (arg) {
93a8090d
NIS
2248 SvREFCNT_dec(arg);
2249 }
2250 }
2251 return f;
2252}
2253
168d5872 2254#ifdef USE_THREADS
93a8090d 2255perl_mutex PerlIO_mutex;
93a8090d 2256#endif
27da23d5
JH
2257
2258/* PL_perlio_fd_refcnt[] is in intrpvar.h */
93a8090d 2259
22c96fc1
NC
2260/* Must be called with PerlIO_mutex locked. */
2261static void
2262S_more_refcounted_fds(pTHX_ const int new_fd) {
2263 const int old_max = PL_perlio_fd_refcnt_size;
f4ae5be6 2264 const int new_max = 16 + (new_fd & ~15);
22c96fc1
NC
2265 int *new_array;
2266
2267 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2268 old_max, new_fd, new_max);
2269
2270 if (new_fd < old_max) {
2271 return;
2272 }
2273
f4ae5be6
NC
2274 assert (new_max > new_fd);
2275
22c96fc1
NC
2276 new_array
2277 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2278
2279 if (!new_array) {
2280#ifdef USE_THREADS
2281 MUTEX_UNLOCK(&PerlIO_mutex);
2282#endif
2283 /* Can't use PerlIO to write as it allocates memory */
2284 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2285 PL_no_mem, strlen(PL_no_mem));
2286 my_exit(1);
2287 }
2288
2289 PL_perlio_fd_refcnt_size = new_max;
2290 PL_perlio_fd_refcnt = new_array;
2291
2292 PerlIO_debug("Zeroing %p, %d\n", new_array + old_max, new_max - old_max);
2293
2294 Zero(new_array + old_max, new_max - old_max, int);
2295}
2296
2297
93a8090d
NIS
2298void
2299PerlIO_init(pTHX)
2300{
2301 /* Place holder for stdstreams call ??? */
168d5872 2302#ifdef USE_THREADS
27da23d5 2303 MUTEX_INIT(&PerlIO_mutex);
96a5add6
AL
2304#else
2305 PERL_UNUSED_CONTEXT;
93a8090d
NIS
2306#endif
2307}
2308
168d5872
NIS
2309void
2310PerlIOUnix_refcnt_inc(int fd)
2311{
27da23d5 2312 dTHX;
22c96fc1 2313 if (fd >= 0) {
97aff369 2314 dVAR;
22c96fc1 2315
168d5872
NIS
2316#ifdef USE_THREADS
2317 MUTEX_LOCK(&PerlIO_mutex);
2318#endif
22c96fc1
NC
2319 if (fd >= PL_perlio_fd_refcnt_size)
2320 S_more_refcounted_fds(aTHX_ fd);
2321
27da23d5
JH
2322 PL_perlio_fd_refcnt[fd]++;
2323 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
22c96fc1 2324
168d5872
NIS
2325#ifdef USE_THREADS
2326 MUTEX_UNLOCK(&PerlIO_mutex);
2327#endif
2328 }
2329}
2330
168d5872
NIS
2331int
2332PerlIOUnix_refcnt_dec(int fd)
2333{
27da23d5 2334 dTHX;
168d5872 2335 int cnt = 0;
22c96fc1 2336 if (fd >= 0) {
97aff369 2337 dVAR;
168d5872
NIS
2338#ifdef USE_THREADS
2339 MUTEX_LOCK(&PerlIO_mutex);
2340#endif
22c96fc1
NC
2341 /* XXX should this be a panic? */
2342 if (fd >= PL_perlio_fd_refcnt_size)
2343 S_more_refcounted_fds(aTHX_ fd);
2344
2345 /* XXX should this be a panic if it drops below 0? */
27da23d5 2346 cnt = --PL_perlio_fd_refcnt[fd];
168d5872
NIS
2347 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2348#ifdef USE_THREADS
2349 MUTEX_UNLOCK(&PerlIO_mutex);
2350#endif
2351 }
2352 return cnt;
2353}
2354
694c95cf
JH
2355void
2356PerlIO_cleanup(pTHX)
2357{
97aff369 2358 dVAR;
694c95cf
JH
2359 int i;
2360#ifdef USE_ITHREADS
9f4bd222
NIS
2361 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2362#else
2363 PerlIO_debug("Cleanup layers\n");
694c95cf
JH
2364#endif
2365 /* Raise STDIN..STDERR refcount so we don't close them */
2366 for (i=0; i < 3; i++)
2367 PerlIOUnix_refcnt_inc(i);
2368 PerlIO_cleantable(aTHX_ &PL_perlio);
2369 /* Restore STDIN..STDERR refcount */
2370 for (i=0; i < 3; i++)
2371 PerlIOUnix_refcnt_dec(i);
9f4bd222
NIS
2372
2373 if (PL_known_layers) {
2374 PerlIO_list_free(aTHX_ PL_known_layers);
2375 PL_known_layers = NULL;
2376 }
27da23d5 2377 if (PL_def_layerlist) {
9f4bd222
NIS
2378 PerlIO_list_free(aTHX_ PL_def_layerlist);
2379 PL_def_layerlist = NULL;
2380 }
694c95cf
JH
2381}
2382
2383
2384
9e353e3b 2385/*--------------------------------------------------------------------------------------*/
14a5cf38 2386/*
71200d45 2387 * Bottom-most level for UNIX-like case
14a5cf38 2388 */
9e353e3b 2389
14a5cf38 2390typedef struct {
22569500
NIS
2391 struct _PerlIO base; /* The generic part */
2392 int fd; /* UNIX like file descriptor */
2393 int oflags; /* open/fcntl flags */
9e353e3b
NIS
2394} PerlIOUnix;
2395
6f9d8c32 2396int
9e353e3b 2397PerlIOUnix_oflags(const char *mode)
760ac839 2398{
14a5cf38 2399 int oflags = -1;
3b6c1aba 2400 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
14a5cf38
JH
2401 mode++;
2402 switch (*mode) {
2403 case 'r':
2404 oflags = O_RDONLY;
2405 if (*++mode == '+') {
2406 oflags = O_RDWR;
2407 mode++;
2408 }
2409 break;
2410
2411 case 'w':
2412 oflags = O_CREAT | O_TRUNC;
2413 if (*++mode == '+') {
2414 oflags |= O_RDWR;
2415 mode++;
2416 }
2417 else
2418 oflags |= O_WRONLY;
2419 break;
2420
2421 case 'a':
2422 oflags = O_CREAT | O_APPEND;
2423 if (*++mode == '+') {
2424 oflags |= O_RDWR;
2425 mode++;
2426 }
2427 else
2428 oflags |= O_WRONLY;
2429 break;
2430 }
2431 if (*mode == 'b') {
2432 oflags |= O_BINARY;
2433 oflags &= ~O_TEXT;
2434 mode++;
2435 }
2436 else if (*mode == 't') {
2437 oflags |= O_TEXT;
2438 oflags &= ~O_BINARY;
2439 mode++;
2440 }
2441 /*
71200d45 2442 * Always open in binary mode
14a5cf38
JH
2443 */
2444 oflags |= O_BINARY;
2445 if (*mode || oflags == -1) {
93189314 2446 SETERRNO(EINVAL, LIB_INVARG);
14a5cf38
JH
2447 oflags = -1;
2448 }
2449 return oflags;
9e353e3b
NIS
2450}
2451
2452IV
f62ce20a 2453PerlIOUnix_fileno(pTHX_ PerlIO *f)
9e353e3b 2454{
96a5add6 2455 PERL_UNUSED_CONTEXT;
14a5cf38 2456 return PerlIOSelf(f, PerlIOUnix)->fd;
9e353e3b
NIS
2457}
2458
aa063c35
NIS
2459static void
2460PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
4b803d04 2461{
de009b76 2462 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
6caa5a9c 2463#if defined(WIN32)
aa063c35
NIS
2464 Stat_t st;
2465 if (PerlLIO_fstat(fd, &st) == 0) {
6caa5a9c 2466 if (!S_ISREG(st.st_mode)) {
aa063c35 2467 PerlIO_debug("%d is not regular file\n",fd);
6caa5a9c
NIS
2468 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2469 }
aa063c35
NIS
2470 else {
2471 PerlIO_debug("%d _is_ a regular file\n",fd);
2472 }
6caa5a9c
NIS
2473 }
2474#endif
aa063c35
NIS
2475 s->fd = fd;
2476 s->oflags = imode;
2477 PerlIOUnix_refcnt_inc(fd);
96a5add6 2478 PERL_UNUSED_CONTEXT;
aa063c35
NIS
2479}
2480
2481IV
2482PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2483{
2484 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
14a5cf38 2485 if (*PerlIONext(f)) {
4b069b44 2486 /* We never call down so do any pending stuff now */
03c0554d 2487 PerlIO_flush(PerlIONext(f));
14a5cf38 2488 /*
71200d45 2489 * XXX could (or should) we retrieve the oflags from the open file
14a5cf38 2490 * handle rather than believing the "mode" we are passed in? XXX
71200d45 2491 * Should the value on NULL mode be 0 or -1?
14a5cf38 2492 */
acbd16bf 2493 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
aa063c35 2494 mode ? PerlIOUnix_oflags(mode) : -1);
14a5cf38
JH
2495 }
2496 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
6caa5a9c 2497
14a5cf38 2498 return code;
4b803d04
NIS
2499}
2500
c2fcde81
JH
2501IV
2502PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2503{
de009b76 2504 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
0723351e 2505 Off_t new_loc;
96a5add6 2506 PERL_UNUSED_CONTEXT;
c2fcde81
JH
2507 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2508#ifdef ESPIPE
2509 SETERRNO(ESPIPE, LIB_INVARG);
2510#else
2511 SETERRNO(EINVAL, LIB_INVARG);
2512#endif
2513 return -1;
2514 }
0723351e
NC
2515 new_loc = PerlLIO_lseek(fd, offset, whence);
2516 if (new_loc == (Off_t) - 1)
dcda55fc 2517 return -1;
c2fcde81
JH
2518 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2519 return 0;
2520}
2521
9e353e3b 2522PerlIO *
14a5cf38
JH
2523PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2524 IV n, const char *mode, int fd, int imode,
2525 int perm, PerlIO *f, int narg, SV **args)
2526{
d9dac8cd 2527 if (PerlIOValid(f)) {
14a5cf38 2528 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
f62ce20a 2529 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
14a5cf38
JH
2530 }
2531 if (narg > 0) {
3b6c1aba 2532 if (*mode == IoTYPE_NUMERIC)
14a5cf38
JH
2533 mode++;
2534 else {
2535 imode = PerlIOUnix_oflags(mode);
2536 perm = 0666;
2537 }
2538 if (imode != -1) {
e62f0680 2539 const char *path = SvPV_nolen_const(*args);
14a5cf38
JH
2540 fd = PerlLIO_open3(path, imode, perm);
2541 }
2542 }
2543 if (fd >= 0) {
3b6c1aba 2544 if (*mode == IoTYPE_IMPLICIT)
14a5cf38
JH
2545 mode++;
2546 if (!f) {
2547 f = PerlIO_allocate(aTHX);
d9dac8cd
NIS
2548 }
2549 if (!PerlIOValid(f)) {
a33cf58c
NIS
2550 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2551 return NULL;
2552 }
d9dac8cd 2553 }
aa063c35 2554 PerlIOUnix_setfd(aTHX_ f, fd, imode);
14a5cf38 2555 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
c2fcde81
JH
2556 if (*mode == IoTYPE_APPEND)
2557 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
14a5cf38
JH
2558 return f;
2559 }
2560 else {
2561 if (f) {
bb263b4e 2562 /*EMPTY*/;
14a5cf38 2563 /*
71200d45 2564 * FIXME: pop layers ???
14a5cf38
JH
2565 */
2566 }
2567 return NULL;
2568 }
9e353e3b
NIS
2569}
2570
71200d45 2571PerlIO *
ecdeb87c 2572PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
71200d45 2573{
dcda55fc 2574 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
93a8090d 2575 int fd = os->fd;
ecdeb87c
NIS
2576 if (flags & PERLIO_DUP_FD) {
2577 fd = PerlLIO_dup(fd);
2578 }
22c96fc1 2579 if (fd >= 0) {
ecdeb87c 2580 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
71200d45
NIS
2581 if (f) {
2582 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
aa063c35 2583 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
71200d45
NIS
2584 return f;
2585 }
71200d45
NIS
2586 }
2587 return NULL;
2588}
2589
2590
9e353e3b 2591SSize_t
f62ce20a 2592PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 2593{
97aff369 2594 dVAR;
de009b76 2595 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2596#ifdef PERLIO_STD_SPECIAL
2597 if (fd == 0)
2598 return PERLIO_STD_IN(fd, vbuf, count);
2599#endif
81428673 2600 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
1fd8f4ce 2601 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
263df5f1 2602 return 0;
1fd8f4ce 2603 }
14a5cf38 2604 while (1) {
b464bac0 2605 const SSize_t len = PerlLIO_read(fd, vbuf, count);
14a5cf38 2606 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2607 if (len < 0) {
2608 if (errno != EAGAIN) {
2609 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2610 }
2611 }
2612 else if (len == 0 && count != 0) {
14a5cf38 2613 PerlIOBase(f)->flags |= PERLIO_F_EOF;
ba85f2ea
NIS
2614 SETERRNO(0,0);
2615 }
14a5cf38
JH
2616 return len;
2617 }
2618 PERL_ASYNC_CHECK();
2619 }
b464bac0 2620 /*NOTREACHED*/
9e353e3b
NIS
2621}
2622
2623SSize_t
f62ce20a 2624PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 2625{
97aff369 2626 dVAR;
de009b76 2627 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
27da23d5
JH
2628#ifdef PERLIO_STD_SPECIAL
2629 if (fd == 1 || fd == 2)
2630 return PERLIO_STD_OUT(fd, vbuf, count);
2631#endif
14a5cf38 2632 while (1) {
de009b76 2633 const SSize_t len = PerlLIO_write(fd, vbuf, count);
14a5cf38 2634 if (len >= 0 || errno != EINTR) {
ba85f2ea
NIS
2635 if (len < 0) {
2636 if (errno != EAGAIN) {
2637 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2638 }
2639 }
14a5cf38
JH
2640 return len;
2641 }
2642 PERL_ASYNC_CHECK();
06da4f11 2643 }
1b6737cc 2644 /*NOTREACHED*/
9e353e3b
NIS
2645}
2646
9e353e3b 2647Off_t
f62ce20a 2648PerlIOUnix_tell(pTHX_ PerlIO *f)
9e353e3b 2649{
96a5add6
AL
2650 PERL_UNUSED_CONTEXT;
2651
14a5cf38 2652 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
9e353e3b
NIS
2653}
2654
71200d45 2655
9e353e3b 2656IV
f62ce20a 2657PerlIOUnix_close(pTHX_ PerlIO *f)
9e353e3b 2658{
97aff369 2659 dVAR;
de009b76 2660 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
14a5cf38 2661 int code = 0;
168d5872
NIS
2662 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2663 if (PerlIOUnix_refcnt_dec(fd) > 0) {
93a8090d
NIS
2664 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2665 return 0;
22569500 2666 }
93a8090d
NIS
2667 }
2668 else {
93189314 2669 SETERRNO(EBADF,SS_IVCHAN);
93a8090d
NIS
2670 return -1;
2671 }
14a5cf38
JH
2672 while (PerlLIO_close(fd) != 0) {
2673 if (errno != EINTR) {
2674 code = -1;
2675 break;
2676 }
2677 PERL_ASYNC_CHECK();
2678 }
2679 if (code == 0) {
2680 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2681 }
2682 return code;
9e353e3b
NIS
2683}
2684
27da23d5 2685PERLIO_FUNCS_DECL(PerlIO_unix) = {
2dc2558e 2686 sizeof(PerlIO_funcs),
14a5cf38
JH
2687 "unix",
2688 sizeof(PerlIOUnix),
2689 PERLIO_K_RAW,
2690 PerlIOUnix_pushed,
44798d05 2691 PerlIOBase_popped,
14a5cf38 2692 PerlIOUnix_open,
86e05cf2 2693 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
2694 NULL,
2695 PerlIOUnix_fileno,
71200d45 2696 PerlIOUnix_dup,
14a5cf38
JH
2697 PerlIOUnix_read,
2698 PerlIOBase_unread,
2699 PerlIOUnix_write,
2700 PerlIOUnix_seek,
2701 PerlIOUnix_tell,
2702 PerlIOUnix_close,
22569500
NIS
2703 PerlIOBase_noop_ok, /* flush */
2704 PerlIOBase_noop_fail, /* fill */
14a5cf38
JH
2705 PerlIOBase_eof,
2706 PerlIOBase_error,
2707 PerlIOBase_clearerr,
2708 PerlIOBase_setlinebuf,
22569500
NIS
2709 NULL, /* get_base */
2710 NULL, /* get_bufsiz */
2711 NULL, /* get_ptr */
2712 NULL, /* get_cnt */
2713 NULL, /* set_ptrcnt */
9e353e3b
NIS
2714};
2715
2716/*--------------------------------------------------------------------------------------*/
14a5cf38 2717/*
71200d45 2718 * stdio as a layer
14a5cf38 2719 */
9e353e3b 2720
313e59c8
NIS
2721#if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2722/* perl5.8 - This ensures the last minute VMS ungetc fix is not
2723 broken by the last second glibc 2.3 fix
2724 */
2725#define STDIO_BUFFER_WRITABLE
2726#endif
2727
2728
14a5cf38
JH
2729typedef struct {
2730 struct _PerlIO base;
22569500 2731 FILE *stdio; /* The stream */
9e353e3b
NIS
2732} PerlIOStdio;
2733
2734IV
f62ce20a 2735PerlIOStdio_fileno(pTHX_ PerlIO *f)
9e353e3b 2736{
96a5add6
AL
2737 PERL_UNUSED_CONTEXT;
2738
c4420975
AL
2739 if (PerlIOValid(f)) {
2740 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2741 if (s)
2742 return PerlSIO_fileno(s);
439ba545
NIS
2743 }
2744 errno = EBADF;
2745 return -1;
9e353e3b
NIS
2746}
2747
766a733e 2748char *
14a5cf38
JH
2749PerlIOStdio_mode(const char *mode, char *tmode)
2750{
de009b76 2751 char * const ret = tmode;
a0625d38
SR
2752 if (mode) {
2753 while (*mode) {
2754 *tmode++ = *mode++;
2755 }
14a5cf38 2756 }
95005ad8 2757#if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
6ce75a77
JH
2758 *tmode++ = 'b';
2759#endif
14a5cf38
JH
2760 *tmode = '\0';
2761 return ret;
2762}
2763
4b803d04 2764IV
2dc2558e 2765PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4b803d04 2766{
1fd8f4ce
NIS
2767 PerlIO *n;
2768 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
46c461b5 2769 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
1fd8f4ce
NIS
2770 if (toptab == tab) {
2771 /* Top is already stdio - pop self (duplicate) and use original */
2772 PerlIO_pop(aTHX_ f);
2773 return 0;
2774 } else {
de009b76 2775 const int fd = PerlIO_fileno(n);
1fd8f4ce
NIS
2776 char tmode[8];
2777 FILE *stdio;
81428673 2778 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
1fd8f4ce
NIS
2779 mode = PerlIOStdio_mode(mode, tmode)))) {
2780 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2781 /* We never call down so do any pending stuff now */
2782 PerlIO_flush(PerlIONext(f));
81428673 2783 }
1fd8f4ce
NIS
2784 else {
2785 return -1;
2786 }
2787 }
14a5cf38 2788 }
2dc2558e 2789 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4b803d04
NIS
2790}
2791
22569500 2792
9e353e3b 2793PerlIO *
4b069b44 2794PerlIO_importFILE(FILE *stdio, const char *mode)
9e353e3b 2795{
14a5cf38
JH
2796 dTHX;
2797 PerlIO *f = NULL;
2798 if (stdio) {
22569500 2799 PerlIOStdio *s;
4b069b44
NIS
2800 if (!mode || !*mode) {
2801 /* We need to probe to see how we can open the stream
2802 so start with read/write and then try write and read
2803 we dup() so that we can fclose without loosing the fd.
2804
2805 Note that the errno value set by a failing fdopen
2806 varies between stdio implementations.
2807 */
de009b76 2808 const int fd = PerlLIO_dup(fileno(stdio));
a33cf58c 2809 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
4b069b44 2810 if (!f2) {
a33cf58c 2811 f2 = PerlSIO_fdopen(fd, (mode = "w"));
4b069b44
NIS
2812 }
2813 if (!f2) {
a33cf58c 2814 f2 = PerlSIO_fdopen(fd, (mode = "r"));
4b069b44
NIS
2815 }
2816 if (!f2) {
2817 /* Don't seem to be able to open */
2818 PerlLIO_close(fd);
2819 return f;
2820 }
2821 fclose(f2);
22569500 2822 }
a0714e2c 2823 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
a33cf58c
NIS
2824 s = PerlIOSelf(f, PerlIOStdio);
2825 s->stdio = stdio;
2826 }
14a5cf38
JH
2827 }
2828 return f;
9e353e3b
NIS
2829}
2830
2831PerlIO *
14a5cf38
JH
2832PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2833 IV n, const char *mode, int fd, int imode,
2834 int perm, PerlIO *f, int narg, SV **args)
2835{
2836 char tmode[8];
d9dac8cd 2837 if (PerlIOValid(f)) {
dcda55fc
AL
2838 const char * const path = SvPV_nolen_const(*args);
2839 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
1751d015
NIS
2840 FILE *stdio;
2841 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2842 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
14a5cf38
JH
2843 s->stdio);
2844 if (!s->stdio)
2845 return NULL;
2846 s->stdio = stdio;
1751d015 2847 PerlIOUnix_refcnt_inc(fileno(s->stdio));
14a5cf38
JH
2848 return f;
2849 }
2850 else {
2851 if (narg > 0) {
dcda55fc 2852 const char * const path = SvPV_nolen_const(*args);
3b6c1aba 2853 if (*mode == IoTYPE_NUMERIC) {
14a5cf38
JH
2854 mode++;
2855 fd = PerlLIO_open3(path, imode, perm);
2856 }
2857 else {
95005ad8
GH
2858 FILE *stdio;
2859 bool appended = FALSE;
2860#ifdef __CYGWIN__
2861 /* Cygwin wants its 'b' early. */
2862 appended = TRUE;
2863 mode = PerlIOStdio_mode(mode, tmode);
2864#endif
2865 stdio = PerlSIO_fopen(path, mode);
6f0313ac 2866 if (stdio) {
6f0313ac
JH
2867 if (!f) {
2868 f = PerlIO_allocate(aTHX);
2869 }
95005ad8
GH
2870 if (!appended)
2871 mode = PerlIOStdio_mode(mode, tmode);
2872 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2873 if (f) {
0f0f9e2b
JH
2874 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2875 PerlIOUnix_refcnt_inc(fileno(stdio));
2876 } else {
2877 PerlSIO_fclose(stdio);
6f0313ac
JH
2878 }
2879 return f;
2880 }
2881 else {
2882 return NULL;
2883 }
14a5cf38
JH
2884 }
2885 }
2886 if (fd >= 0) {
2887 FILE *stdio = NULL;
2888 int init = 0;
3b6c1aba 2889 if (*mode == IoTYPE_IMPLICIT) {
14a5cf38
JH
2890 init = 1;
2891 mode++;
2892 }
2893 if (init) {
2894 switch (fd) {
2895 case 0:
2896 stdio = PerlSIO_stdin;
2897 break;
2898 case 1:
2899 stdio = PerlSIO_stdout;
2900 break;
2901 case 2:
2902 stdio = PerlSIO_stderr;
2903 break;
2904 }
2905 }
2906 else {
2907 stdio = PerlSIO_fdopen(fd, mode =
2908 PerlIOStdio_mode(mode, tmode));
2909 }
2910 if (stdio) {
d9dac8cd
NIS
2911 if (!f) {
2912 f = PerlIO_allocate(aTHX);
2913 }
a33cf58c 2914 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
1a159fba
JH
2915 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2916 PerlIOUnix_refcnt_inc(fileno(stdio));
a33cf58c 2917 }
14a5cf38
JH
2918 return f;
2919 }
2920 }
2921 }
ee518936 2922 return NULL;
9e353e3b
NIS
2923}
2924
1751d015 2925PerlIO *
ecdeb87c 2926PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
1751d015
NIS
2927{
2928 /* This assumes no layers underneath - which is what
2929 happens, but is not how I remember it. NI-S 2001/10/16
2930 */
ecdeb87c 2931 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
694c95cf 2932 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
de009b76 2933 const int fd = fileno(stdio);
9217ff3f 2934 char mode[8];
ecdeb87c 2935 if (flags & PERLIO_DUP_FD) {
de009b76 2936 const int dfd = PerlLIO_dup(fileno(stdio));
9217ff3f
NIS
2937 if (dfd >= 0) {
2938 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2939 goto set_this;
ecdeb87c
NIS
2940 }
2941 else {
bb263b4e 2942 /*EMPTY*/;
ecdeb87c
NIS
2943 /* FIXME: To avoid messy error recovery if dup fails
2944 re-use the existing stdio as though flag was not set
2945 */
2946 }
2947 }
9217ff3f
NIS
2948 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2949 set_this:
694c95cf
JH
2950 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2951 PerlIOUnix_refcnt_inc(fileno(stdio));
1751d015
NIS
2952 }
2953 return f;
2954}
2955
0d7a5398
NIS
2956static int
2957PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2958{
96a5add6
AL
2959 PERL_UNUSED_CONTEXT;
2960
0d7a5398 2961 /* XXX this could use PerlIO_canset_fileno() and
37725cdc 2962 * PerlIO_set_fileno() support from Configure
0d7a5398 2963 */
ef8eacb8
AT
2964# if defined(__UCLIBC__)
2965 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2966 f->__filedes = -1;
2967 return 1;
2968# elif defined(__GLIBC__)
0d7a5398 2969 /* There may be a better way for GLIBC:
37725cdc 2970 - libio.h defines a flag to not close() on cleanup
0d7a5398
NIS
2971 */
2972 f->_fileno = -1;
2973 return 1;
2974# elif defined(__sun__)
cfedb851 2975 return 0;
0d7a5398
NIS
2976# elif defined(__hpux)
2977 f->__fileH = 0xff;
2978 f->__fileL = 0xff;
2979 return 1;
9837d373 2980 /* Next one ->_file seems to be a reasonable fallback, i.e. if
37725cdc 2981 your platform does not have special entry try this one.
9837d373
NIS
2982 [For OSF only have confirmation for Tru64 (alpha)
2983 but assume other OSFs will be similar.]
37725cdc 2984 */
9837d373 2985# elif defined(_AIX) || defined(__osf__) || defined(__irix__)
0d7a5398
NIS
2986 f->_file = -1;
2987 return 1;
2988# elif defined(__FreeBSD__)
2989 /* There may be a better way on FreeBSD:
37725cdc
NIS
2990 - we could insert a dummy func in the _close function entry
2991 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
2992 */
2993 f->_file = -1;
0c49ea6a
SU
2994 return 1;
2995# elif defined(__OpenBSD__)
2996 /* There may be a better way on OpenBSD:
2997 - we could insert a dummy func in the _close function entry
2998 f->_close = (int (*)(void *)) dummy_close;
2999 */
3000 f->_file = -1;
0d7a5398 3001 return 1;
59ad941d
IZ
3002# elif defined(__EMX__)
3003 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3004 f->_handle = -1;
3005 return 1;
0d7a5398
NIS
3006# elif defined(__CYGWIN__)
3007 /* There may be a better way on CYGWIN:
37725cdc
NIS
3008 - we could insert a dummy func in the _close function entry
3009 f->_close = (int (*)(void *)) dummy_close;
0d7a5398
NIS
3010 */
3011 f->_file = -1;
3012 return 1;
3013# elif defined(WIN32)
3014# if defined(__BORLANDC__)
3015 f->fd = PerlLIO_dup(fileno(f));
b475b3e6
JH
3016# elif defined(UNDER_CE)
3017 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3018 structure at all
3019 */
0d7a5398
NIS
3020# else
3021 f->_file = -1;
3022# endif
3023 return 1;
3024# else
3025#if 0
37725cdc 3026 /* Sarathy's code did this - we fall back to a dup/dup2 hack
0d7a5398 3027 (which isn't thread safe) instead
37725cdc 3028 */
0d7a5398
NIS
3029# error "Don't know how to set FILE.fileno on your platform"
3030#endif
8772537c 3031 PERL_UNUSED_ARG(f);
0d7a5398
NIS
3032 return 0;
3033# endif
3034}
3035
1751d015 3036IV
f62ce20a 3037PerlIOStdio_close(pTHX_ PerlIO *f)
1751d015 3038{
c4420975 3039 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
439ba545
NIS
3040 if (!stdio) {
3041 errno = EBADF;
3042 return -1;
3043 }
9217ff3f 3044 else {
de009b76 3045 const int fd = fileno(stdio);
0d7a5398 3046 int invalidate = 0;
bbfd922f 3047 IV result = 0;
0d7a5398
NIS
3048 int saveerr = 0;
3049 int dupfd = 0;
3050#ifdef SOCKS5_VERSION_NAME
37725cdc
NIS
3051 /* Socks lib overrides close() but stdio isn't linked to
3052 that library (though we are) - so we must call close()
3053 on sockets on stdio's behalf.
3054 */
0d7a5398
NIS
3055 int optval;
3056 Sock_size_t optlen = sizeof(int);
6b4ce6c8 3057 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
37725cdc 3058 invalidate = 1;
0d7a5398 3059#endif
6b4ce6c8 3060 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
0d7a5398 3061 invalidate = 1;
0d7a5398 3062 if (invalidate) {
6b4ce6c8
AL
3063 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3064 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3065 return 0;
3066 if (stdio == stdout || stdio == stderr)
3067 return PerlIO_flush(f);
37725cdc
NIS
3068 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3069 Use Sarathy's trick from maint-5.6 to invalidate the
3070 fileno slot of the FILE *
3071 */
bbfd922f 3072 result = PerlIO_flush(f);
0d7a5398 3073 saveerr = errno;
6b4ce6c8
AL
3074 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3075 if (!invalidate)
3076 dupfd = PerlLIO_dup(fd);
37725cdc 3077 }
0d7a5398 3078 result = PerlSIO_fclose(stdio);
37725cdc
NIS
3079 /* We treat error from stdio as success if we invalidated
3080 errno may NOT be expected EBADF
e8529473
NIS
3081 */
3082 if (invalidate && result != 0) {
0d7a5398
NIS
3083 errno = saveerr;
3084 result = 0;
37725cdc 3085 }
6b4ce6c8
AL
3086#ifdef SOCKS5_VERSION_NAME
3087 /* in SOCKS' case, let close() determine return value */
3088 result = close(fd);
3089#endif
0d7a5398
NIS
3090 if (dupfd) {
3091 PerlLIO_dup2(dupfd,fd);
8a521f28 3092 PerlLIO_close(dupfd);
9217ff3f
NIS
3093 }
3094 return result;
37725cdc 3095 }
1751d015
NIS
3096}
3097
9e353e3b 3098SSize_t
f62ce20a 3099PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
9e353e3b 3100{
97aff369 3101 dVAR;
c4420975 3102 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3103 SSize_t got = 0;
4d948241
NIS
3104 for (;;) {
3105 if (count == 1) {
3106 STDCHAR *buf = (STDCHAR *) vbuf;
3107 /*
3108 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3109 * stdio does not do that for fread()
3110 */
de009b76 3111 const int ch = PerlSIO_fgetc(s);
4d948241
NIS
3112 if (ch != EOF) {
3113 *buf = ch;
3114 got = 1;
3115 }
14a5cf38 3116 }
4d948241
NIS
3117 else
3118 got = PerlSIO_fread(vbuf, 1, count, s);
b1d8b47a
CS
3119 if (got == 0 && PerlSIO_ferror(s))
3120 got = -1;
42a7a32f 3121 if (got >= 0 || errno != EINTR)
4d948241
NIS
3122 break;
3123 PERL_ASYNC_CHECK();
42a7a32f 3124 SETERRNO(0,0); /* just in case */
14a5cf38 3125 }
14a5cf38 3126 return got;
9e353e3b
NIS
3127}
3128
3129SSize_t
f62ce20a 3130PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3131{
14a5cf38 3132 SSize_t unread = 0;
c4420975 3133 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3134
313e59c8 3135#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3136 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3137 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3138 STDCHAR *base = PerlIO_get_base(f);
3139 SSize_t cnt = PerlIO_get_cnt(f);
3140 STDCHAR *ptr = PerlIO_get_ptr(f);
3141 SSize_t avail = ptr - base;
3142 if (avail > 0) {
3143 if (avail > count) {
3144 avail = count;
3145 }
3146 ptr -= avail;
3147 Move(buf-avail,ptr,avail,STDCHAR);
3148 count -= avail;
3149 unread += avail;
3150 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
9f7cd136
NIS
3151 if (PerlSIO_feof(s) && unread >= 0)
3152 PerlSIO_clearerr(s);
3153 }
3154 }
313e59c8
NIS
3155 else
3156#endif
3157 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3158 /* We can get pointer to buffer but not its base
3159 Do ungetc() but check chars are ending up in the
3160 buffer
3161 */
3162 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3163 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3164 while (count > 0) {
de009b76 3165 const int ch = *--buf & 0xFF;
9f7cd136
NIS
3166 if (ungetc(ch,s) != ch) {
3167 /* ungetc did not work */
3168 break;
3169 }
3170 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3171 /* Did not change pointer as expected */
3172 fgetc(s); /* get char back again */
3173 break;
3174 }
3175 /* It worked ! */
3176 count--;
3177 unread++;
93679785
NIS
3178 }
3179 }
3180
3181 if (count > 0) {
3182 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
14a5cf38
JH
3183 }
3184 return unread;
9e353e3b
NIS
3185}
3186
3187SSize_t
f62ce20a 3188PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
9e353e3b 3189{
97aff369 3190 dVAR;
4d948241
NIS
3191 SSize_t got;
3192 for (;;) {
3193 got = PerlSIO_fwrite(vbuf, 1, count,
3194 PerlIOSelf(f, PerlIOStdio)->stdio);
42a7a32f 3195 if (got >= 0 || errno != EINTR)
4d948241
NIS
3196 break;
3197 PERL_ASYNC_CHECK();
42a7a32f 3198 SETERRNO(0,0); /* just in case */
4d948241
NIS
3199 }
3200 return got;
9e353e3b
NIS
3201}
3202
94a175e1 3203IV
f62ce20a 3204PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
9e353e3b 3205{
c4420975 3206 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3207 PERL_UNUSED_CONTEXT;
3208
94a175e1 3209 return PerlSIO_fseek(stdio, offset, whence);
9e353e3b
NIS
3210}
3211
3212Off_t
f62ce20a 3213PerlIOStdio_tell(pTHX_ PerlIO *f)
9e353e3b 3214{
c4420975 3215 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3216 PERL_UNUSED_CONTEXT;
3217
94a175e1 3218 return PerlSIO_ftell(stdio);
9e353e3b
NIS
3219}
3220
3221IV
f62ce20a 3222PerlIOStdio_flush(pTHX_ PerlIO *f)
9e353e3b 3223{
c4420975 3224 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
96a5add6
AL
3225 PERL_UNUSED_CONTEXT;
3226
14a5cf38
JH
3227 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3228 return PerlSIO_fflush(stdio);
3229 }
3230 else {
bb263b4e 3231 /*EMPTY*/;
88b61e10 3232#if 0
14a5cf38
JH
3233 /*
3234 * FIXME: This discards ungetc() and pre-read stuff which is not
71200d45 3235 * right if this is just a "sync" from a layer above Suspect right
14a5cf38 3236 * design is to do _this_ but not have layer above flush this
71200d45 3237 * layer read-to-read
14a5cf38
JH
3238 */
3239 /*
71200d45 3240 * Not writeable - sync by attempting a seek
14a5cf38 3241 */
79852593 3242 const int err = errno;
14a5cf38
JH
3243 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3244 errno = err;
88b61e10 3245#endif
14a5cf38
JH
3246 }
3247 return 0;
9e353e3b
NIS
3248}
3249
3250IV
f62ce20a 3251PerlIOStdio_eof(pTHX_ PerlIO *f)
9e353e3b 3252{
96a5add6
AL
3253 PERL_UNUSED_CONTEXT;
3254
14a5cf38 3255 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3256}
3257
3258IV
f62ce20a 3259PerlIOStdio_error(pTHX_ PerlIO *f)
9e353e3b 3260{
96a5add6
AL
3261 PERL_UNUSED_CONTEXT;
3262
263df5f1 3263 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3264}
3265
3266void
f62ce20a 3267PerlIOStdio_clearerr(pTHX_ PerlIO *f)
9e353e3b 3268{
96a5add6
AL
3269 PERL_UNUSED_CONTEXT;
3270
14a5cf38 3271 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b
NIS
3272}
3273
3274void
f62ce20a 3275PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
9e353e3b 3276{
96a5add6
AL
3277 PERL_UNUSED_CONTEXT;
3278
9e353e3b 3279#ifdef HAS_SETLINEBUF
14a5cf38 3280 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
9e353e3b 3281#else
bd61b366 3282 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
9e353e3b
NIS
3283#endif
3284}
3285
3286#ifdef FILE_base
3287STDCHAR *
f62ce20a 3288PerlIOStdio_get_base(pTHX_ PerlIO *f)
9e353e3b 3289{
c4420975 3290 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3291 return (STDCHAR*)PerlSIO_get_base(stdio);
9e353e3b
NIS
3292}
3293
3294Size_t
f62ce20a 3295PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
9e353e3b 3296{
c4420975 3297 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3298 return PerlSIO_get_bufsiz(stdio);
9e353e3b
NIS
3299}
3300#endif
3301
3302#ifdef USE_STDIO_PTR
3303STDCHAR *
f62ce20a 3304PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
9e353e3b 3305{
c4420975 3306 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
cc00df79 3307 return (STDCHAR*)PerlSIO_get_ptr(stdio);
9e353e3b
NIS
3308}
3309
3310SSize_t
f62ce20a 3311PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
9e353e3b 3312{
c4420975 3313 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3314 return PerlSIO_get_cnt(stdio);
9e353e3b
NIS
3315}
3316
3317void
f62ce20a 3318PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
9e353e3b 3319{
c4420975 3320 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
14a5cf38 3321 if (ptr != NULL) {
9e353e3b 3322#ifdef STDIO_PTR_LVALUE
22569500 3323 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
9e353e3b 3324#ifdef STDIO_PTR_LVAL_SETS_CNT
14a5cf38 3325 if (PerlSIO_get_cnt(stdio) != (cnt)) {
14a5cf38
JH
3326 assert(PerlSIO_get_cnt(stdio) == (cnt));
3327 }
9e353e3b
NIS
3328#endif
3329#if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
14a5cf38 3330 /*
71200d45 3331 * Setting ptr _does_ change cnt - we are done
14a5cf38
JH
3332 */
3333 return;
9e353e3b 3334#endif
22569500 3335#else /* STDIO_PTR_LVALUE */
14a5cf38 3336 PerlProc_abort();
22569500 3337#endif /* STDIO_PTR_LVALUE */
14a5cf38
JH
3338 }
3339 /*
71200d45 3340 * Now (or only) set cnt
14a5cf38 3341 */
9e353e3b 3342#ifdef STDIO_CNT_LVALUE
14a5cf38 3343 PerlSIO_set_cnt(stdio, cnt);
22569500 3344#else /* STDIO_CNT_LVALUE */
9e353e3b 3345#if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
14a5cf38
JH
3346 PerlSIO_set_ptr(stdio,
3347 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3348 cnt));
22569500 3349#else /* STDIO_PTR_LVAL_SETS_CNT */
14a5cf38 3350 PerlProc_abort();
22569500
NIS
3351#endif /* STDIO_PTR_LVAL_SETS_CNT */
3352#endif /* STDIO_CNT_LVALUE */
9e353e3b
NIS
3353}
3354
93679785 3355
9e353e3b
NIS
3356#endif
3357
93679785
NIS
3358IV
3359PerlIOStdio_fill(pTHX_ PerlIO *f)
3360{
c4420975 3361 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
93679785 3362 int c;
96a5add6
AL
3363 PERL_UNUSED_CONTEXT;
3364
93679785
NIS
3365 /*
3366 * fflush()ing read-only streams can cause trouble on some stdio-s
3367 */
3368 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3369 if (PerlSIO_fflush(stdio) != 0)
3370 return EOF;
3371 }
3372 c = PerlSIO_fgetc(stdio);
3373 if (c == EOF)
3374 return EOF;
3375
3376#if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
313e59c8
NIS
3377
3378#ifdef STDIO_BUFFER_WRITABLE
9f7cd136 3379 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
93679785
NIS
3380 /* Fake ungetc() to the real buffer in case system's ungetc
3381 goes elsewhere
3382 */
3383 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3384 SSize_t cnt = PerlSIO_get_cnt(stdio);
3385 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3386 if (ptr == base+1) {
3387 *--ptr = (STDCHAR) c;
3388 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3389 if (PerlSIO_feof(stdio))
3390 PerlSIO_clearerr(stdio);
3391 return 0;
3392 }
3393 }
313e59c8
NIS
3394 else
3395#endif
3396 if (PerlIO_has_cntptr(f)) {
9f7cd136
NIS
3397 STDCHAR ch = c;
3398 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3399 return 0;
3400 }
3401 }
93679785
NIS
3402#endif
3403
3404#if defined(VMS)
3405 /* An ungetc()d char is handled separately from the regular
3406 * buffer, so we stuff it in the buffer ourselves.
3407 * Should never get called as should hit code above
3408 */
bad9695d
NIS
3409 *(--((*stdio)->_ptr)) = (unsigned char) c;
3410 (*stdio)->_cnt++;
93679785
NIS
3411#else
3412 /* If buffer snoop scheme above fails fall back to
9f7cd136 3413 using ungetc().
93679785
NIS
3414 */
3415 if (PerlSIO_ungetc(c, stdio) != c)
3416 return EOF;
3417#endif
3418 return 0;
3419}
3420
3421
3422
27da23d5 3423PERLIO_FUNCS_DECL(PerlIO_stdio) = {
2dc2558e 3424 sizeof(PerlIO_funcs),
14a5cf38
JH
3425 "stdio",
3426 sizeof(PerlIOStdio),
86e05cf2 3427 PERLIO_K_BUFFERED|PERLIO_K_RAW,
1fd8f4ce 3428 PerlIOStdio_pushed,
44798d05 3429 PerlIOBase_popped,
14a5cf38 3430 PerlIOStdio_open,
86e05cf2 3431 PerlIOBase_binmode, /* binmode */
14a5cf38
JH
3432 NULL,
3433 PerlIOStdio_fileno,
71200d45 3434 PerlIOStdio_dup,
14a5cf38
JH
3435 PerlIOStdio_read,
3436 PerlIOStdio_unread,
3437 PerlIOStdio_write,
3438 PerlIOStdio_seek,
3439 PerlIOStdio_tell,
3440 PerlIOStdio_close,
3441 PerlIOStdio_flush,
3442 PerlIOStdio_fill,
3443 PerlIOStdio_eof,
3444 PerlIOStdio_error,
3445 PerlIOStdio_clearerr,
3446 PerlIOStdio_setlinebuf,
9e353e3b 3447#ifdef FILE_base
14a5cf38
JH
3448 PerlIOStdio_get_base,
3449 PerlIOStdio_get_bufsiz,
9e353e3b 3450#else
14a5cf38
JH
3451 NULL,
3452 NULL,
9e353e3b
NIS
3453#endif
3454#ifdef USE_STDIO_PTR
14a5cf38
JH
3455 PerlIOStdio_get_ptr,
3456 PerlIOStdio_get_cnt,
15b61c98 3457# if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
79ed0f43 3458 PerlIOStdio_set_ptrcnt,
15b61c98
JH
3459# else
3460 NULL,
3461# endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3462#else
3463 NULL,
14a5cf38
JH
3464 NULL,
3465 NULL,
15b61c98 3466#endif /* USE_STDIO_PTR */
9e353e3b
NIS
3467};
3468
b9d6bf13
JH
3469/* Note that calls to PerlIO_exportFILE() are reversed using
3470 * PerlIO_releaseFILE(), not importFILE. */
9e353e3b 3471FILE *
81428673 3472PerlIO_exportFILE(PerlIO * f, const char *mode)
9e353e3b 3473{
e87a358a 3474 dTHX;
81428673
NIS
3475 FILE *stdio = NULL;
3476 if (PerlIOValid(f)) {
3477 char buf[8];
3478 PerlIO_flush(f);
3479 if (!mode || !*mode) {
3480 mode = PerlIO_modestr(f, buf);
3481 }
3482 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3483 if (stdio) {
3484 PerlIOl *l = *f;
9f75cc58 3485 PerlIO *f2;
81428673
NIS
3486 /* De-link any lower layers so new :stdio sticks */
3487 *f = NULL;
a0714e2c 3488 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
9f75cc58 3489 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
81428673
NIS
3490 s->stdio = stdio;
3491 /* Link previous lower layers under new one */
3492 *PerlIONext(f) = l;
3493 }
3494 else {
3495 /* restore layers list */
3496 *f = l;
3497 }
a33cf58c 3498 }
14a5cf38
JH
3499 }
3500 return stdio;
9e353e3b
NIS
3501}
3502
81428673 3503
9e353e3b
NIS
3504FILE *
3505PerlIO_findFILE(PerlIO *f)
3506{
14a5cf38
JH
3507 PerlIOl *l = *f;
3508 while (l) {
3509 if (l->tab == &PerlIO_stdio) {
3510 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3511 return s->stdio;
3512 }
3513 l = *PerlIONext(&l);
f7e7eb72 3514 }
4b069b44 3515 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
bd61b366 3516 return PerlIO_exportFILE(f, NULL);
9e353e3b
NIS
3517}
3518
b9d6bf13 3519/* Use this to reverse PerlIO_exportFILE calls. */
9e353e3b
NIS
3520void
3521PerlIO_releaseFILE(PerlIO *p, FILE *f)
3522{
27da23d5 3523 dVAR;
22569500
NIS
3524 PerlIOl *l;
3525 while ((l = *p)) {
3526 if (l->tab == &PerlIO_stdio) {
3527 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3528 if (s->stdio == f) {
3529 dTHX;
3530 PerlIO_pop(aTHX_ p);
3531 return;
3532 }
3533 }
3534 p = PerlIONext(p);
3535 }
3536 return;
9e353e3b
NIS
3537}
3538
3539/*--------------------------------------------------------------------------------------*/
14a5cf38 3540/*
71200d45 3541 * perlio buffer layer
14a5cf38 3542 */
9e353e3b 3543
5e2ab84b 3544IV
2dc2558e 3545PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
5e2ab84b 3546{
14a5cf38 3547 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
de009b76 3548 const int fd = PerlIO_fileno(f);
14a5cf38
JH
3549 if (fd >= 0 && PerlLIO_isatty(fd)) {
3550 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3551 }
4b069b44 3552 if (*PerlIONext(f)) {
de009b76 3553 const Off_t posn = PerlIO_tell(PerlIONext(f));
4b069b44
NIS
3554 if (posn != (Off_t) - 1) {
3555 b->posn = posn;
3556 }
14a5cf38 3557 }
2dc2558e 3558 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
5e2ab84b
NIS
3559}
3560
9e353e3b 3561PerlIO *
14a5cf38
JH
3562PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3563 IV n, const char *mode, int fd, int imode, int perm,
3564 PerlIO *f, int narg, SV **args)
3565{
04892f78 3566 if (PerlIOValid(f)) {
14a5cf38 3567 PerlIO *next = PerlIONext(f);
67363c0d
JH
3568 PerlIO_funcs *tab =
3569 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3570 if (tab && tab->Open)
3571 next =
3572 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3573 next, narg, args);
2dc2558e 3574 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
14a5cf38
JH
3575 return NULL;
3576 }