1 /*
2 * perlio.c Copyright (c) 1996-2004, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
5 */
6
7 /*
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
12 /*
13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14 * at the dispatch tables, even when we do not need it for other reasons.
15 * Invent a dSYS macro to abstract this out
16 */
17 #ifdef PERL_IMPLICIT_SYS
18 #define dSYS dTHX
19 #else
20 #define dSYS dNOOP
21 #endif
22
23 #define VOIDUSED 1
24 #ifdef PERL_MICRO
25 # include "uconfig.h"
26 #else
27 # include "config.h"
28 #endif
29
30 #define PERLIO_NOT_STDIO 0
31 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
32 /*
33 * #define PerlIO FILE
34 */
35 #endif
36 /*
37 * This file provides those parts of PerlIO abstraction
38 * which are not #defined in perlio.h.
39 * Which these are depends on various Configure #ifdef's
40 */
41
42 #include "EXTERN.h"
43 #define PERL_IN_PERLIO_C
44 #include "perl.h"
45
46 #ifdef PERL_IMPLICIT_CONTEXT
47 #undef dSYS
48 #define dSYS dTHX
49 #endif
50
51 #include "XSUB.h"
52
53 #ifdef __Lynx__
54 /* Missing proto on LynxOS */
55 int mkstemp(char*);
56 #endif
57
58 /* Call the callback or PerlIOBase, and return failure. */
59 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
60 if (PerlIOValid(f)) { \
61 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
62 if (tab && tab->callback) \
63 return (*tab->callback) args; \
64 else \
65 return PerlIOBase_ ## base args; \
66 } \
67 else \
68 SETERRNO(EBADF, SS_IVCHAN); \
69 return failure
70
71 /* Call the callback or fail, and return failure. */
72 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
73 if (PerlIOValid(f)) { \
74 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
75 if (tab && tab->callback) \
76 return (*tab->callback) args; \
77 SETERRNO(EINVAL, LIB_INVARG); \
78 } \
79 else \
80 SETERRNO(EBADF, SS_IVCHAN); \
81 return failure
82
83 /* Call the callback or PerlIOBase, and be void. */
84 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
85 if (PerlIOValid(f)) { \
86 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
87 if (tab && tab->callback) \
88 (*tab->callback) args; \
89 else \
90 PerlIOBase_ ## base args; \
91 } \
92 else \
93 SETERRNO(EBADF, SS_IVCHAN)
94
95 /* Call the callback or fail, and be void. */
96 #define Perl_PerlIO_or_fail_void(f, callback, args) \
97 if (PerlIOValid(f)) { \
98 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
99 if (tab && tab->callback) \
100 (*tab->callback) args; \
101 else \
102 SETERRNO(EINVAL, LIB_INVARG); \
103 } \
104 else \
105 SETERRNO(EBADF, SS_IVCHAN)
106
107 int
perlsio_binmode(FILE * fp,int iotype,int mode)108 perlsio_binmode(FILE *fp, int iotype, int mode)
109 {
110 /*
111 * This used to be contents of do_binmode in doio.c
112 */
113 #ifdef DOSISH
114 # if defined(atarist) || defined(__MINT__)
115 if (!fflush(fp)) {
116 if (mode & O_BINARY)
117 ((FILE *) fp)->_flag |= _IOBIN;
118 else
119 ((FILE *) fp)->_flag &= ~_IOBIN;
120 return 1;
121 }
122 return 0;
123 # else
124 dTHX;
125 #ifdef NETWARE
126 if (PerlLIO_setmode(fp, mode) != -1) {
127 #else
128 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
129 #endif
130 # if defined(WIN32) && defined(__BORLANDC__)
131 /*
132 * The translation mode of the stream is maintained independent of
133 * the translation mode of the fd in the Borland RTL (heavy
134 * digging through their runtime sources reveal). User has to set
135 * the mode explicitly for the stream (though they don't document
136 * this anywhere). GSAR 97-5-24
137 */
138 fseek(fp, 0L, 0);
139 if (mode & O_BINARY)
140 fp->flags |= _F_BIN;
141 else
142 fp->flags &= ~_F_BIN;
143 # endif
144 return 1;
145 }
146 else
147 return 0;
148 # endif
149 #else
150 # if defined(USEMYBINMODE)
151 dTHX;
152 if (my_binmode(fp, iotype, mode) != FALSE)
153 return 1;
154 else
155 return 0;
156 # else
157 return 1;
158 # endif
159 #endif
160 }
161
162 #ifndef O_ACCMODE
163 #define O_ACCMODE 3 /* Assume traditional implementation */
164 #endif
165
166 int
167 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
168 {
169 int result = rawmode & O_ACCMODE;
170 int ix = 0;
171 int ptype;
172 switch (result) {
173 case O_RDONLY:
174 ptype = IoTYPE_RDONLY;
175 break;
176 case O_WRONLY:
177 ptype = IoTYPE_WRONLY;
178 break;
179 case O_RDWR:
180 default:
181 ptype = IoTYPE_RDWR;
182 break;
183 }
184 if (writing)
185 *writing = (result != O_RDONLY);
186
187 if (result == O_RDONLY) {
188 mode[ix++] = 'r';
189 }
190 #ifdef O_APPEND
191 else if (rawmode & O_APPEND) {
192 mode[ix++] = 'a';
193 if (result != O_WRONLY)
194 mode[ix++] = '+';
195 }
196 #endif
197 else {
198 if (result == O_WRONLY)
199 mode[ix++] = 'w';
200 else {
201 mode[ix++] = 'r';
202 mode[ix++] = '+';
203 }
204 }
205 if (rawmode & O_BINARY)
206 mode[ix++] = 'b';
207 mode[ix] = '\0';
208 return ptype;
209 }
210
211 #ifndef PERLIO_LAYERS
212 int
213 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
214 {
215 if (!names || !*names
216 || strEQ(names, ":crlf")
217 || strEQ(names, ":raw")
218 || strEQ(names, ":bytes")
219 ) {
220 return 0;
221 }
222 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
223 /*
224 * NOTREACHED
225 */
226 return -1;
227 }
228
229 void
230 PerlIO_destruct(pTHX)
231 {
232 }
233
234 int
235 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
236 {
237 #ifdef USE_SFIO
238 return 1;
239 #else
240 return perlsio_binmode(fp, iotype, mode);
241 #endif
242 }
243
244 PerlIO *
245 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
246 {
247 #ifdef PERL_MICRO
248 return NULL;
249 #else
250 #ifdef PERL_IMPLICIT_SYS
251 return PerlSIO_fdupopen(f);
252 #else
253 #ifdef WIN32
254 return win32_fdupopen(f);
255 #else
256 if (f) {
257 int fd = PerlLIO_dup(PerlIO_fileno(f));
258 if (fd >= 0) {
259 char mode[8];
260 int omode = fcntl(fd, F_GETFL);
261 #ifdef DJGPP
262 omode = djgpp_get_stream_mode(f);
263 #endif
264 PerlIO_intmode2str(omode,mode,NULL);
265 /* the r+ is a hack */
266 return PerlIO_fdopen(fd, mode);
267 }
268 return NULL;
269 }
270 else {
271 SETERRNO(EBADF, SS_IVCHAN);
272 }
273 #endif
274 return NULL;
275 #endif
276 #endif
277 }
278
279
280 /*
281 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
282 */
283
284 PerlIO *
285 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
286 int imode, int perm, PerlIO *old, int narg, SV **args)
287 {
288 if (narg) {
289 if (narg > 1) {
290 Perl_croak(aTHX_ "More than one argument to open");
291 }
292 if (*args == &PL_sv_undef)
293 return PerlIO_tmpfile();
294 else {
295 char *name = SvPV_nolen(*args);
296 if (*mode == IoTYPE_NUMERIC) {
297 fd = PerlLIO_open3(name, imode, perm);
298 if (fd >= 0)
299 return PerlIO_fdopen(fd, (char *) mode + 1);
300 }
301 else if (old) {
302 return PerlIO_reopen(name, mode, old);
303 }
304 else {
305 return PerlIO_open(name, mode);
306 }
307 }
308 }
309 else {
310 return PerlIO_fdopen(fd, (char *) mode);
311 }
312 return NULL;
313 }
314
315 XS(XS_PerlIO__Layer__find)
316 {
317 dXSARGS;
318 if (items < 2)
319 Perl_croak(aTHX_ "Usage class->find(name[,load])");
320 else {
321 char *name = SvPV_nolen(ST(1));
322 ST(0) = (strEQ(name, "crlf")
323 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
324 XSRETURN(1);
325 }
326 }
327
328
329 void
330 Perl_boot_core_PerlIO(pTHX)
331 {
332 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
333 }
334
335 #endif
336
337
338 #ifdef PERLIO_IS_STDIO
339
340 void
341 PerlIO_init(pTHX)
342 {
343 /*
344 * Does nothing (yet) except force this file to be included in perl
345 * binary. That allows this file to force inclusion of other functions
346 * that may be required by loadable extensions e.g. for
347 * FileHandle::tmpfile
348 */
349 }
350
351 #undef PerlIO_tmpfile
352 PerlIO *
353 PerlIO_tmpfile(void)
354 {
355 return tmpfile();
356 }
357
358 #else /* PERLIO_IS_STDIO */
359
360 #ifdef USE_SFIO
361
362 #undef HAS_FSETPOS
363 #undef HAS_FGETPOS
364
365 /*
366 * This section is just to make sure these functions get pulled in from
367 * libsfio.a
368 */
369
370 #undef PerlIO_tmpfile
371 PerlIO *
372 PerlIO_tmpfile(void)
373 {
374 return sftmp(0);
375 }
376
377 void
378 PerlIO_init(pTHX)
379 {
380 /*
381 * Force this file to be included in perl binary. Which allows this
382 * file to force inclusion of other functions that may be required by
383 * loadable extensions e.g. for FileHandle::tmpfile
384 */
385
386 /*
387 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
388 * results in a lot of lseek()s to regular files and lot of small
389 * writes to pipes.
390 */
391 sfset(sfstdout, SF_SHARE, 0);
392 }
393
394 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
395 PerlIO *
396 PerlIO_importFILE(FILE *stdio, const char *mode)
397 {
398 int fd = fileno(stdio);
399 if (!mode || !*mode) {
400 mode = "r+";
401 }
402 return PerlIO_fdopen(fd, mode);
403 }
404
405 FILE *
406 PerlIO_findFILE(PerlIO *pio)
407 {
408 int fd = PerlIO_fileno(pio);
409 FILE *f = fdopen(fd, "r+");
410 PerlIO_flush(pio);
411 if (!f && errno == EINVAL)
412 f = fdopen(fd, "w");
413 if (!f && errno == EINVAL)
414 f = fdopen(fd, "r");
415 return f;
416 }
417
418
419 #else /* USE_SFIO */
420 /*======================================================================================*/
421 /*
422 * Implement all the PerlIO interface ourselves.
423 */
424
425 #include "perliol.h"
426
427 /*
428 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
429 * files
430 */
431 #ifdef I_UNISTD
432 #include <unistd.h>
433 #endif
434 #ifdef HAS_MMAP
435 #include <sys/mman.h>
436 #endif
437
438 /*
439 * Why is this here - not in perlio.h? RMB
440 */
441 void PerlIO_debug(const char *fmt, ...)
442 __attribute__format__(__printf__, 1, 2);
443
444 void
445 PerlIO_debug(const char *fmt, ...)
446 {
447 static int dbg = 0;
448 va_list ap;
449 dSYS;
450 va_start(ap, fmt);
451 if (!dbg) {
452 char *s = PerlEnv_getenv("PERLIO_DEBUG");
453 if (s && *s)
454 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
455 else
456 dbg = -1;
457 }
458 if (dbg > 0) {
459 dTHX;
460 #ifdef USE_ITHREADS
461 /* Use fixed buffer as sv_catpvf etc. needs SVs */
462 char buffer[1024];
463 char *s;
464 STRLEN len;
465 s = CopFILE(PL_curcop);
466 if (!s)
467 s = "(none)";
468 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
469 len = strlen(buffer);
470 vsprintf(buffer+len, fmt, ap);
471 PerlLIO_write(dbg, buffer, strlen(buffer));
472 #else
473 SV *sv = newSVpvn("", 0);
474 char *s;
475 STRLEN len;
476 s = CopFILE(PL_curcop);
477 if (!s)
478 s = "(none)";
479 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
480 (IV) CopLINE(PL_curcop));
481 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
482
483 s = SvPV(sv, len);
484 PerlLIO_write(dbg, s, len);
485 SvREFCNT_dec(sv);
486 #endif
487 }
488 va_end(ap);
489 }
490
491 /*--------------------------------------------------------------------------------------*/
492
493 /*
494 * Inner level routines
495 */
496
497 /*
498 * Table of pointers to the PerlIO structs (malloc'ed)
499 */
500 #define PERLIO_TABLE_SIZE 64
501
502 PerlIO *
503 PerlIO_allocate(pTHX)
504 {
505 /*
506 * Find a free slot in the table, allocating new table as necessary
507 */
508 PerlIO **last;
509 PerlIO *f;
510 last = &PL_perlio;
511 while ((f = *last)) {
512 int i;
513 last = (PerlIO **) (f);
514 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
515 if (!*++f) {
516 return f;
517 }
518 }
519 }
520 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
521 if (!f) {
522 return NULL;
523 }
524 *last = f;
525 return f + 1;
526 }
527
528 #undef PerlIO_fdupopen
529 PerlIO *
530 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
531 {
532 if (PerlIOValid(f)) {
533 PerlIO_funcs *tab = PerlIOBase(f)->tab;
534 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
535 if (tab && tab->Dup)
536 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
537 else {
538 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
539 }
540 }
541 else
542 SETERRNO(EBADF, SS_IVCHAN);
543
544 return NULL;
545 }
546
547 void
548 PerlIO_cleantable(pTHX_ PerlIO **tablep)
549 {
550 PerlIO *table = *tablep;
551 if (table) {
552 int i;
553 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
554 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
555 PerlIO *f = table + i;
556 if (*f) {
557 PerlIO_close(f);
558 }
559 }
560 Safefree(table);
561 *tablep = NULL;
562 }
563 }
564
565
566 PerlIO_list_t *
567 PerlIO_list_alloc(pTHX)
568 {
569 PerlIO_list_t *list;
570 Newz('L', list, 1, PerlIO_list_t);
571 list->refcnt = 1;
572 return list;
573 }
574
575 void
576 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
577 {
578 if (list) {
579 if (--list->refcnt == 0) {
580 if (list->array) {
581 IV i;
582 for (i = 0; i < list->cur; i++) {
583 if (list->array[i].arg)
584 SvREFCNT_dec(list->array[i].arg);
585 }
586 Safefree(list->array);
587 }
588 Safefree(list);
589 }
590 }
591 }
592
593 void
594 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
595 {
596 PerlIO_pair_t *p;
597 if (list->cur >= list->len) {
598 list->len += 8;
599 if (list->array)
600 Renew(list->array, list->len, PerlIO_pair_t);
601 else
602 New('l', list->array, list->len, PerlIO_pair_t);
603 }
604 p = &(list->array[list->cur++]);
605 p->funcs = funcs;
606 if ((p->arg = arg)) {
607 SvREFCNT_inc(arg);
608 }
609 }
610
611 PerlIO_list_t *
612 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
613 {
614 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
615 if (proto) {
616 int i;
617 list = PerlIO_list_alloc(aTHX);
618 for (i=0; i < proto->cur; i++) {
619 SV *arg = Nullsv;
620 if (proto->array[i].arg)
621 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
622 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
623 }
624 }
625 return list;
626 }
627
628 void
629 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
630 {
631 #ifdef USE_ITHREADS
632 PerlIO **table = &proto->Iperlio;
633 PerlIO *f;
634 PL_perlio = NULL;
635 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
636 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
637 PerlIO_allocate(aTHX); /* root slot is never used */
638 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
639 while ((f = *table)) {
640 int i;
641 table = (PerlIO **) (f++);
642 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
643 if (*f) {
644 (void) fp_dup(f, 0, param);
645 }
646 f++;
647 }
648 }
649 #endif
650 }
651
652 void
653 PerlIO_destruct(pTHX)
654 {
655 PerlIO **table = &PL_perlio;
656 PerlIO *f;
657 #ifdef USE_ITHREADS
658 PerlIO_debug("Destruct %p\n",aTHX);
659 #endif
660 while ((f = *table)) {
661 int i;
662 table = (PerlIO **) (f++);
663 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
664 PerlIO *x = f;
665 PerlIOl *l;
666 while ((l = *x)) {
667 if (l->tab->kind & PERLIO_K_DESTRUCT) {
668 PerlIO_debug("Destruct popping %s\n", l->tab->name);
669 PerlIO_flush(x);
670 PerlIO_pop(aTHX_ x);
671 }
672 else {
673 x = PerlIONext(x);
674 }
675 }
676 f++;
677 }
678 }
679 }
680
681 void
682 PerlIO_pop(pTHX_ PerlIO *f)
683 {
684 PerlIOl *l = *f;
685 if (l) {
686 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
687 if (l->tab->Popped) {
688 /*
689 * If popped returns non-zero do not free its layer structure
690 * it has either done so itself, or it is shared and still in
691 * use
692 */
693 if ((*l->tab->Popped) (aTHX_ f) != 0)
694 return;
695 }
696 *f = l->next;
697 Safefree(l);
698 }
699 }
700
701 /* Return as an array the stack of layers on a filehandle. Note that
702 * the stack is returned top-first in the array, and there are three
703 * times as many array elements as there are layers in the stack: the
704 * first element of a layer triplet is the name, the second one is the
705 * arguments, and the third one is the flags. */
706
707 AV *
708 PerlIO_get_layers(pTHX_ PerlIO *f)
709 {
710 AV *av = newAV();
711
712 if (PerlIOValid(f)) {
713 PerlIOl *l = PerlIOBase(f);
714
715 while (l) {
716 SV *name = l->tab && l->tab->name ?
717 newSVpv(l->tab->name, 0) : &PL_sv_undef;
718 SV *arg = l->tab && l->tab->Getarg ?
719 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
720 av_push(av, name);
721 av_push(av, arg);
722 av_push(av, newSViv((IV)l->flags));
723 l = l->next;
724 }
725 }
726
727 return av;
728 }
729
730 /*--------------------------------------------------------------------------------------*/
731 /*
732 * XS Interface for perl code
733 */
734
735 PerlIO_funcs *
736 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
737 {
738 IV i;
739 if ((SSize_t) len <= 0)
740 len = strlen(name);
741 for (i = 0; i < PL_known_layers->cur; i++) {
742 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
743 if (memEQ(f->name, name, len) && f->name[len] == 0) {
744 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
745 return f;
746 }
747 }
748 if (load && PL_subname && PL_def_layerlist
749 && PL_def_layerlist->cur >= 2) {
750 if (PL_in_load_module) {
751 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
752 return NULL;
753 } else {
754 SV *pkgsv = newSVpvn("PerlIO", 6);
755 SV *layer = newSVpvn(name, len);
756 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
757 ENTER;
758 SAVEINT(PL_in_load_module);
759 if (cv) {
760 SAVESPTR(PL_warnhook);
761 PL_warnhook = (SV *) cv;
762 }
763 PL_in_load_module++;
764 /*
765 * The two SVs are magically freed by load_module
766 */
767 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
768 PL_in_load_module--;
769 LEAVE;
770 return PerlIO_find_layer(aTHX_ name, len, 0);
771 }
772 }
773 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
774 return NULL;
775 }
776
777 #ifdef USE_ATTRIBUTES_FOR_PERLIO
778
779 static int
780 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
781 {
782 if (SvROK(sv)) {
783 IO *io = GvIOn((GV *) SvRV(sv));
784 PerlIO *ifp = IoIFP(io);
785 PerlIO *ofp = IoOFP(io);
786 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
787 }
788 return 0;
789 }
790
791 static int
792 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
793 {
794 if (SvROK(sv)) {
795 IO *io = GvIOn((GV *) SvRV(sv));
796 PerlIO *ifp = IoIFP(io);
797 PerlIO *ofp = IoOFP(io);
798 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
799 }
800 return 0;
801 }
802
803 static int
804 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
805 {
806 Perl_warn(aTHX_ "clear %" SVf, sv);
807 return 0;
808 }
809
810 static int
811 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
812 {
813 Perl_warn(aTHX_ "free %" SVf, sv);
814 return 0;
815 }
816
817 MGVTBL perlio_vtab = {
818 perlio_mg_get,
819 perlio_mg_set,
820 NULL, /* len */
821 perlio_mg_clear,
822 perlio_mg_free
823 };
824
825 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
826 {
827 dXSARGS;
828 SV *sv = SvRV(ST(1));
829 AV *av = newAV();
830 MAGIC *mg;
831 int count = 0;
832 int i;
833 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
834 SvRMAGICAL_off(sv);
835 mg = mg_find(sv, PERL_MAGIC_ext);
836 mg->mg_virtual = &perlio_vtab;
837 mg_magical(sv);
838 Perl_warn(aTHX_ "attrib %" SVf, sv);
839 for (i = 2; i < items; i++) {
840 STRLEN len;
841 const char *name = SvPV(ST(i), len);
842 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
843 if (layer) {
844 av_push(av, SvREFCNT_inc(layer));
845 }
846 else {
847 ST(count) = ST(i);
848 count++;
849 }
850 }
851 SvREFCNT_dec(av);
852 XSRETURN(count);
853 }
854
855 #endif /* USE_ATTIBUTES_FOR_PERLIO */
856
857 SV *
858 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
859 {
860 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
861 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
862 return sv;
863 }
864
865 XS(XS_PerlIO__Layer__NoWarnings)
866 {
867 /* This is used as a %SIG{__WARN__} handler to supress warnings
868 during loading of layers.
869 */
870 dXSARGS;
871 if (items)
872 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
873 XSRETURN(0);
874 }
875
876 XS(XS_PerlIO__Layer__find)
877 {
878 dXSARGS;
879 if (items < 2)
880 Perl_croak(aTHX_ "Usage class->find(name[,load])");
881 else {
882 STRLEN len = 0;
883 char *name = SvPV(ST(1), len);
884 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
885 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
886 ST(0) =
887 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
888 &PL_sv_undef;
889 XSRETURN(1);
890 }
891 }
892
893 void
894 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
895 {
896 if (!PL_known_layers)
897 PL_known_layers = PerlIO_list_alloc(aTHX);
898 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
899 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
900 }
901
902 int
903 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
904 {
905 if (names) {
906 const char *s = names;
907 while (*s) {
908 while (isSPACE(*s) || *s == ':')
909 s++;
910 if (*s) {
911 STRLEN llen = 0;
912 const char *e = s;
913 const char *as = Nullch;
914 STRLEN alen = 0;
915 if (!isIDFIRST(*s)) {
916 /*
917 * Message is consistent with how attribute lists are
918 * passed. Even though this means "foo : : bar" is
919 * seen as an invalid separator character.
920 */
921 char q = ((*s == '\'') ? '"' : '\'');
922 if (ckWARN(WARN_LAYER))
923 Perl_warner(aTHX_ packWARN(WARN_LAYER),
924 "Invalid separator character %c%c%c in PerlIO layer specification %s",
925 q, *s, q, s);
926 SETERRNO(EINVAL, LIB_INVARG);
927 return -1;
928 }
929 do {
930 e++;
931 } while (isALNUM(*e));
932 llen = e - s;
933 if (*e == '(') {
934 int nesting = 1;
935 as = ++e;
936 while (nesting) {
937 switch (*e++) {
938 case ')':
939 if (--nesting == 0)
940 alen = (e - 1) - as;
941 break;
942 case '(':
943 ++nesting;
944 break;
945 case '\\':
946 /*
947 * It's a nul terminated string, not allowed
948 * to \ the terminating null. Anything other
949 * character is passed over.
950 */
951 if (*e++) {
952 break;
953 }
954 /*
955 * Drop through
956 */
957 case '\0':
958 e--;
959 if (ckWARN(WARN_LAYER))
960 Perl_warner(aTHX_ packWARN(WARN_LAYER),
961 "Argument list not closed for PerlIO layer \"%.*s\"",
962 (int) (e - s), s);
963 return -1;
964 default:
965 /*
966 * boring.
967 */
968 break;
969 }
970 }
971 }
972 if (e > s) {
973 bool warn_layer = ckWARN(WARN_LAYER);
974 PerlIO_funcs *layer =
975 PerlIO_find_layer(aTHX_ s, llen, 1);
976 if (layer) {
977 PerlIO_list_push(aTHX_ av, layer,
978 (as) ? newSVpvn(as,
979 alen) :
980 &PL_sv_undef);
981 }
982 else {
983 if (warn_layer)
984 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
985 (int) llen, s);
986 return -1;
987 }
988 }
989 s = e;
990 }
991 }
992 }
993 return 0;
994 }
995
996 void
997 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
998 {
999 PerlIO_funcs *tab = &PerlIO_perlio;
1000 #ifdef PERLIO_USING_CRLF
1001 tab = &PerlIO_crlf;
1002 #else
1003 if (PerlIO_stdio.Set_ptrcnt)
1004 tab = &PerlIO_stdio;
1005 #endif
1006 PerlIO_debug("Pushing %s\n", tab->name);
1007 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1008 &PL_sv_undef);
1009 }
1010
1011 SV *
1012 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1013 {
1014 return av->array[n].arg;
1015 }
1016
1017 PerlIO_funcs *
1018 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1019 {
1020 if (n >= 0 && n < av->cur) {
1021 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1022 av->array[n].funcs->name);
1023 return av->array[n].funcs;
1024 }
1025 if (!def)
1026 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1027 return def;
1028 }
1029
1030 IV
1031 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1032 {
1033 if (PerlIOValid(f)) {
1034 PerlIO_flush(f);
1035 PerlIO_pop(aTHX_ f);
1036 return 0;
1037 }
1038 return -1;
1039 }
1040
1041 PerlIO_funcs PerlIO_remove = {
1042 sizeof(PerlIO_funcs),
1043 "pop",
1044 0,
1045 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1046 PerlIOPop_pushed,
1047 NULL,
1048 NULL,
1049 NULL,
1050 NULL,
1051 NULL,
1052 NULL,
1053 NULL,
1054 NULL,
1055 NULL,
1056 NULL,
1057 NULL, /* flush */
1058 NULL, /* fill */
1059 NULL,
1060 NULL,
1061 NULL,
1062 NULL,
1063 NULL, /* get_base */
1064 NULL, /* get_bufsiz */
1065 NULL, /* get_ptr */
1066 NULL, /* get_cnt */
1067 NULL, /* set_ptrcnt */
1068 };
1069
1070 PerlIO_list_t *
1071 PerlIO_default_layers(pTHX)
1072 {
1073 if (!PL_def_layerlist) {
1074 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1075 PerlIO_funcs *osLayer = &PerlIO_unix;
1076 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1077 PerlIO_define_layer(aTHX_ & PerlIO_unix);
1078 #if defined(WIN32)
1079 PerlIO_define_layer(aTHX_ & PerlIO_win32);
1080 #if 0
1081 osLayer = &PerlIO_win32;
1082 #endif
1083 #endif
1084 PerlIO_define_layer(aTHX_ & PerlIO_raw);
1085 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
1086 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
1087 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
1088 #ifdef HAS_MMAP
1089 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
1090 #endif
1091 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
1092 PerlIO_define_layer(aTHX_ & PerlIO_remove);
1093 PerlIO_define_layer(aTHX_ & PerlIO_byte);
1094 PerlIO_list_push(aTHX_ PL_def_layerlist,
1095 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1096 &PL_sv_undef);
1097 if (s) {
1098 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1099 }
1100 else {
1101 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1102 }
1103 }
1104 if (PL_def_layerlist->cur < 2) {
1105 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1106 }
1107 return PL_def_layerlist;
1108 }
1109
1110 void
1111 Perl_boot_core_PerlIO(pTHX)
1112 {
1113 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1114 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1115 __FILE__);
1116 #endif
1117 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1118 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1119 }
1120
1121 PerlIO_funcs *
1122 PerlIO_default_layer(pTHX_ I32 n)
1123 {
1124 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1125 if (n < 0)
1126 n += av->cur;
1127 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1128 }
1129
1130 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1131 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1132
1133 void
1134 PerlIO_stdstreams(pTHX)
1135 {
1136 if (!PL_perlio) {
1137 PerlIO_allocate(aTHX);
1138 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1139 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1140 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1141 }
1142 }
1143
1144 PerlIO *
1145 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1146 {
1147 if (tab->fsize != sizeof(PerlIO_funcs)) {
1148 mismatch:
1149 Perl_croak(aTHX_ "Layer does not match this perl");
1150 }
1151 if (tab->size) {
1152 PerlIOl *l = NULL;
1153 if (tab->size < sizeof(PerlIOl)) {
1154 goto mismatch;
1155 }
1156 /* Real layer with a data area */
1157 Newc('L',l,tab->size,char,PerlIOl);
1158 if (l && f) {
1159 Zero(l, tab->size, char);
1160 l->next = *f;
1161 l->tab = tab;
1162 *f = l;
1163 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1164 (mode) ? mode : "(Null)", (void*)arg);
1165 if (*l->tab->Pushed &&
1166 (*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1167 PerlIO_pop(aTHX_ f);
1168 return NULL;
1169 }
1170 }
1171 }
1172 else if (f) {
1173 /* Pseudo-layer where push does its own stack adjust */
1174 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1175 (mode) ? mode : "(Null)", (void*)arg);
1176 if (tab->Pushed &&
1177 (*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1178 return NULL;
1179 }
1180 }
1181 return f;
1182 }
1183
1184 IV
1185 PerlIOBase_binmode(pTHX_ PerlIO *f)
1186 {
1187 if (PerlIOValid(f)) {
1188 /* Is layer suitable for raw stream ? */
1189 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1190 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1191 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1192 }
1193 else {
1194 /* Not suitable - pop it */
1195 PerlIO_pop(aTHX_ f);
1196 }
1197 return 0;
1198 }
1199 return -1;
1200 }
1201
1202 IV
1203 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1204 {
1205
1206 if (PerlIOValid(f)) {
1207 PerlIO *t;
1208 PerlIOl *l;
1209 PerlIO_flush(f);
1210 /*
1211 * Strip all layers that are not suitable for a raw stream
1212 */
1213 t = f;
1214 while (t && (l = *t)) {
1215 if (l->tab->Binmode) {
1216 /* Has a handler - normal case */
1217 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1218 if (*t == l) {
1219 /* Layer still there - move down a layer */
1220 t = PerlIONext(t);
1221 }
1222 }
1223 else {
1224 return -1;
1225 }
1226 }
1227 else {
1228 /* No handler - pop it */
1229 PerlIO_pop(aTHX_ t);
1230 }
1231 }
1232 if (PerlIOValid(f)) {
1233 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1234 return 0;
1235 }
1236 }
1237 return -1;
1238 }
1239
1240 int
1241 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1242 PerlIO_list_t *layers, IV n, IV max)
1243 {
1244 int code = 0;
1245 while (n < max) {
1246 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1247 if (tab) {
1248 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1249 code = -1;
1250 break;
1251 }
1252 }
1253 n++;
1254 }
1255 return code;
1256 }
1257
1258 int
1259 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1260 {
1261 int code = 0;
1262 if (f && names) {
1263 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1264 code = PerlIO_parse_layers(aTHX_ layers, names);
1265 if (code == 0) {
1266 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1267 }
1268 PerlIO_list_free(aTHX_ layers);
1269 }
1270 return code;
1271 }
1272
1273
1274 /*--------------------------------------------------------------------------------------*/
1275 /*
1276 * Given the abstraction above the public API functions
1277 */
1278
1279 int
1280 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1281 {
1282 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1283 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1284 (names) ? names : "(Null)");
1285 if (names) {
1286 /* Do not flush etc. if (e.g.) switching encodings.
1287 if a pushed layer knows it needs to flush lower layers
1288 (for example :unix which is never going to call them)
1289 it can do the flush when it is pushed.
1290 */
1291 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1292 }
1293 else {
1294 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1295 #ifdef PERLIO_USING_CRLF
1296 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1297 O_BINARY so we can look for it in mode.
1298 */
1299 if (!(mode & O_BINARY)) {
1300 /* Text mode */
1301 /* FIXME?: Looking down the layer stack seems wrong,
1302 but is a way of reaching past (say) an encoding layer
1303 to flip CRLF-ness of the layer(s) below
1304 */
1305 while (*f) {
1306 /* Perhaps we should turn on bottom-most aware layer
1307 e.g. Ilya's idea that UNIX TTY could serve
1308 */
1309 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1310 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1311 /* Not in text mode - flush any pending stuff and flip it */
1312 PerlIO_flush(f);
1313 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1314 }
1315 /* Only need to turn it on in one layer so we are done */
1316 return TRUE;
1317 }
1318 f = PerlIONext(f);
1319 }
1320 /* Not finding a CRLF aware layer presumably means we are binary
1321 which is not what was requested - so we failed
1322 We _could_ push :crlf layer but so could caller
1323 */
1324 return FALSE;
1325 }
1326 #endif
1327 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1328 So code that used to be here is now in PerlIORaw_pushed().
1329 */
1330 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1331 }
1332 }
1333
1334 int
1335 PerlIO__close(pTHX_ PerlIO *f)
1336 {
1337 if (PerlIOValid(f)) {
1338 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1339 if (tab && tab->Close)
1340 return (*tab->Close)(aTHX_ f);
1341 else
1342 return PerlIOBase_close(aTHX_ f);
1343 }
1344 else {
1345 SETERRNO(EBADF, SS_IVCHAN);
1346 return -1;
1347 }
1348 }
1349
1350 int
1351 Perl_PerlIO_close(pTHX_ PerlIO *f)
1352 {
1353 int code = PerlIO__close(aTHX_ f);
1354 while (PerlIOValid(f)) {
1355 PerlIO_pop(aTHX_ f);
1356 }
1357 return code;
1358 }
1359
1360 int
1361 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1362 {
1363 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1364 }
1365
1366 static const char *
1367 PerlIO_context_layers(pTHX_ const char *mode)
1368 {
1369 const char *type = NULL;
1370 /*
1371 * Need to supply default layer info from open.pm
1372 */
1373 if (PL_curcop) {
1374 SV *layers = PL_curcop->cop_io;
1375 if (layers) {
1376 STRLEN len;
1377 type = SvPV(layers, len);
1378 if (type && mode[0] != 'r') {
1379 /*
1380 * Skip to write part
1381 */
1382 const char *s = strchr(type, 0);
1383 if (s && (STRLEN)(s - type) < len) {
1384 type = s + 1;
1385 }
1386 }
1387 }
1388 }
1389 return type;
1390 }
1391
1392 static PerlIO_funcs *
1393 PerlIO_layer_from_ref(pTHX_ SV *sv)
1394 {
1395 /*
1396 * For any scalar type load the handler which is bundled with perl
1397 */
1398 if (SvTYPE(sv) < SVt_PVAV)
1399 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1400
1401 /*
1402 * For other types allow if layer is known but don't try and load it
1403 */
1404 switch (SvTYPE(sv)) {
1405 case SVt_PVAV:
1406 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1407 case SVt_PVHV:
1408 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1409 case SVt_PVCV:
1410 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1411 case SVt_PVGV:
1412 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1413 }
1414 return NULL;
1415 }
1416
1417 PerlIO_list_t *
1418 PerlIO_resolve_layers(pTHX_ const char *layers,
1419 const char *mode, int narg, SV **args)
1420 {
1421 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1422 int incdef = 1;
1423 if (!PL_perlio)
1424 PerlIO_stdstreams(aTHX);
1425 if (narg) {
1426 SV *arg = *args;
1427 /*
1428 * If it is a reference but not an object see if we have a handler
1429 * for it
1430 */
1431 if (SvROK(arg) && !sv_isobject(arg)) {
1432 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1433 if (handler) {
1434 def = PerlIO_list_alloc(aTHX);
1435 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1436 incdef = 0;
1437 }
1438 /*
1439 * Don't fail if handler cannot be found :via(...) etc. may do
1440 * something sensible else we will just stringfy and open
1441 * resulting string.
1442 */
1443 }
1444 }
1445 if (!layers)
1446 layers = PerlIO_context_layers(aTHX_ mode);
1447 if (layers && *layers) {
1448 PerlIO_list_t *av;
1449 if (incdef) {
1450 IV i = def->cur;
1451 av = PerlIO_list_alloc(aTHX);
1452 for (i = 0; i < def->cur; i++) {
1453 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1454 def->array[i].arg);
1455 }
1456 }
1457 else {
1458 av = def;
1459 }
1460 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1461 return av;
1462 }
1463 else {
1464 PerlIO_list_free(aTHX_ av);
1465 return (PerlIO_list_t *) NULL;
1466 }
1467 }
1468 else {
1469 if (incdef)
1470 def->refcnt++;
1471 return def;
1472 }
1473 }
1474
1475 PerlIO *
1476 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1477 int imode, int perm, PerlIO *f, int narg, SV **args)
1478 {
1479 if (!f && narg == 1 && *args == &PL_sv_undef) {
1480 if ((f = PerlIO_tmpfile())) {
1481 if (!layers)
1482 layers = PerlIO_context_layers(aTHX_ mode);
1483 if (layers && *layers)
1484 PerlIO_apply_layers(aTHX_ f, mode, layers);
1485 }
1486 }
1487 else {
1488 PerlIO_list_t *layera = NULL;
1489 IV n;
1490 PerlIO_funcs *tab = NULL;
1491 if (PerlIOValid(f)) {
1492 /*
1493 * This is "reopen" - it is not tested as perl does not use it
1494 * yet
1495 */
1496 PerlIOl *l = *f;
1497 layera = PerlIO_list_alloc(aTHX);
1498 while (l) {
1499 SV *arg = (l->tab->Getarg)
1500 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1501 : &PL_sv_undef;
1502 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1503 l = *PerlIONext(&l);
1504 }
1505 }
1506 else {
1507 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1508 if (!layera) {
1509 return NULL;
1510 }
1511 }
1512 /*
1513 * Start at "top" of layer stack
1514 */
1515 n = layera->cur - 1;
1516 while (n >= 0) {
1517 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1518 if (t && t->Open) {
1519 tab = t;
1520 break;
1521 }
1522 n--;
1523 }
1524 if (tab) {
1525 /*
1526 * Found that layer 'n' can do opens - call it
1527 */
1528 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1529 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1530 }
1531 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1532 tab->name, layers, mode, fd, imode, perm,
1533 (void*)f, narg, (void*)args);
1534 if (tab->Open)
1535 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1536 f, narg, args);
1537 else {
1538 SETERRNO(EINVAL, LIB_INVARG);
1539 f = NULL;
1540 }
1541 if (f) {
1542 if (n + 1 < layera->cur) {
1543 /*
1544 * More layers above the one that we used to open -
1545 * apply them now
1546 */
1547 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1548 /* If pushing layers fails close the file */
1549 PerlIO_close(f);
1550 f = NULL;
1551 }
1552 }
1553 }
1554 }
1555 PerlIO_list_free(aTHX_ layera);
1556 }
1557 return f;
1558 }
1559
1560
1561 SSize_t
1562 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1563 {
1564 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1565 }
1566
1567 SSize_t
1568 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1569 {
1570 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1571 }
1572
1573 SSize_t
1574 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1575 {
1576 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1577 }
1578
1579 int
1580 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1581 {
1582 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1583 }
1584
1585 Off_t
1586 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1587 {
1588 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1589 }
1590
1591 int
1592 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1593 {
1594 if (f) {
1595 if (*f) {
1596 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1597
1598 if (tab && tab->Flush)
1599 return (*tab->Flush) (aTHX_ f);
1600 else
1601 return 0; /* If no Flush defined, silently succeed. */
1602 }
1603 else {
1604 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1605 SETERRNO(EBADF, SS_IVCHAN);
1606 return -1;
1607 }
1608 }
1609 else {
1610 /*
1611 * Is it good API design to do flush-all on NULL, a potentially
1612 * errorneous input? Maybe some magical value (PerlIO*
1613 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1614 * things on fflush(NULL), but should we be bound by their design
1615 * decisions? --jhi
1616 */
1617 PerlIO **table = &PL_perlio;
1618 int code = 0;
1619 while ((f = *table)) {
1620 int i;
1621 table = (PerlIO **) (f++);
1622 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1623 if (*f && PerlIO_flush(f) != 0)
1624 code = -1;
1625 f++;
1626 }
1627 }
1628 return code;
1629 }
1630 }
1631
1632 void
1633 PerlIOBase_flush_linebuf(pTHX)
1634 {
1635 PerlIO **table = &PL_perlio;
1636 PerlIO *f;
1637 while ((f = *table)) {
1638 int i;
1639 table = (PerlIO **) (f++);
1640 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1641 if (*f
1642 && (PerlIOBase(f)->
1643 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1644 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1645 PerlIO_flush(f);
1646 f++;
1647 }
1648 }
1649 }
1650
1651 int
1652 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1653 {
1654 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1655 }
1656
1657 int
1658 PerlIO_isutf8(PerlIO *f)
1659 {
1660 if (PerlIOValid(f))
1661 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1662 else
1663 SETERRNO(EBADF, SS_IVCHAN);
1664
1665 return -1;
1666 }
1667
1668 int
1669 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1670 {
1671 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1672 }
1673
1674 int
1675 Perl_PerlIO_error(pTHX_ PerlIO *f)
1676 {
1677 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1678 }
1679
1680 void
1681 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1682 {
1683 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1684 }
1685
1686 void
1687 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1688 {
1689 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1690 }
1691
1692 int
1693 PerlIO_has_base(PerlIO *f)
1694 {
1695 if (PerlIOValid(f)) {
1696 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1697
1698 if (tab)
1699 return (tab->Get_base != NULL);
1700 SETERRNO(EINVAL, LIB_INVARG);
1701 }
1702 else
1703 SETERRNO(EBADF, SS_IVCHAN);
1704
1705 return 0;
1706 }
1707
1708 int
1709 PerlIO_fast_gets(PerlIO *f)
1710 {
1711 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1712 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1713
1714 if (tab)
1715 return (tab->Set_ptrcnt != NULL);
1716 SETERRNO(EINVAL, LIB_INVARG);
1717 }
1718 else
1719 SETERRNO(EBADF, SS_IVCHAN);
1720
1721 return 0;
1722 }
1723
1724 int
1725 PerlIO_has_cntptr(PerlIO *f)
1726 {
1727 if (PerlIOValid(f)) {
1728 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1729
1730 if (tab)
1731 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1732 SETERRNO(EINVAL, LIB_INVARG);
1733 }
1734 else
1735 SETERRNO(EBADF, SS_IVCHAN);
1736
1737 return 0;
1738 }
1739
1740 int
1741 PerlIO_canset_cnt(PerlIO *f)
1742 {
1743 if (PerlIOValid(f)) {
1744 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1745
1746 if (tab)
1747 return (tab->Set_ptrcnt != NULL);
1748 SETERRNO(EINVAL, LIB_INVARG);
1749 }
1750 else
1751 SETERRNO(EBADF, SS_IVCHAN);
1752
1753 return 0;
1754 }
1755
1756 STDCHAR *
1757 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1758 {
1759 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1760 }
1761
1762 int
1763 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1764 {
1765 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1766 }
1767
1768 STDCHAR *
1769 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1770 {
1771 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1772 }
1773
1774 int
1775 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1776 {
1777 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1778 }
1779
1780 void
1781 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1782 {
1783 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1784 }
1785
1786 void
1787 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1788 {
1789 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1790 }
1791
1792
1793 /*--------------------------------------------------------------------------------------*/
1794 /*
1795 * utf8 and raw dummy layers
1796 */
1797
1798 IV
1799 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1800 {
1801 if (PerlIOValid(f)) {
1802 if (tab->kind & PERLIO_K_UTF8)
1803 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1804 else
1805 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1806 return 0;
1807 }
1808 return -1;
1809 }
1810
1811 PerlIO_funcs PerlIO_utf8 = {
1812 sizeof(PerlIO_funcs),
1813 "utf8",
1814 0,
1815 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1816 PerlIOUtf8_pushed,
1817 NULL,
1818 NULL,
1819 NULL,
1820 NULL,
1821 NULL,
1822 NULL,
1823 NULL,
1824 NULL,
1825 NULL,
1826 NULL,
1827 NULL, /* flush */
1828 NULL, /* fill */
1829 NULL,
1830 NULL,
1831 NULL,
1832 NULL,
1833 NULL, /* get_base */
1834 NULL, /* get_bufsiz */
1835 NULL, /* get_ptr */
1836 NULL, /* get_cnt */
1837 NULL, /* set_ptrcnt */
1838 };
1839
1840 PerlIO_funcs PerlIO_byte = {
1841 sizeof(PerlIO_funcs),
1842 "bytes",
1843 0,
1844 PERLIO_K_DUMMY,
1845 PerlIOUtf8_pushed,
1846 NULL,
1847 NULL,
1848 NULL,
1849 NULL,
1850 NULL,
1851 NULL,
1852 NULL,
1853 NULL,
1854 NULL,
1855 NULL,
1856 NULL, /* flush */
1857 NULL, /* fill */
1858 NULL,
1859 NULL,
1860 NULL,
1861 NULL,
1862 NULL, /* get_base */
1863 NULL, /* get_bufsiz */
1864 NULL, /* get_ptr */
1865 NULL, /* get_cnt */
1866 NULL, /* set_ptrcnt */
1867 };
1868
1869 PerlIO *
1870 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1871 IV n, const char *mode, int fd, int imode, int perm,
1872 PerlIO *old, int narg, SV **args)
1873 {
1874 PerlIO_funcs *tab = PerlIO_default_btm();
1875 if (tab && tab->Open)
1876 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1877 old, narg, args);
1878 SETERRNO(EINVAL, LIB_INVARG);
1879 return NULL;
1880 }
1881
1882 PerlIO_funcs PerlIO_raw = {
1883 sizeof(PerlIO_funcs),
1884 "raw",
1885 0,
1886 PERLIO_K_DUMMY,
1887 PerlIORaw_pushed,
1888 PerlIOBase_popped,
1889 PerlIORaw_open,
1890 NULL,
1891 NULL,
1892 NULL,
1893 NULL,
1894 NULL,
1895 NULL,
1896 NULL,
1897 NULL,
1898 NULL, /* flush */
1899 NULL, /* fill */
1900 NULL,
1901 NULL,
1902 NULL,
1903 NULL,
1904 NULL, /* get_base */
1905 NULL, /* get_bufsiz */
1906 NULL, /* get_ptr */
1907 NULL, /* get_cnt */
1908 NULL, /* set_ptrcnt */
1909 };
1910 /*--------------------------------------------------------------------------------------*/
1911 /*--------------------------------------------------------------------------------------*/
1912 /*
1913 * "Methods" of the "base class"
1914 */
1915
1916 IV
1917 PerlIOBase_fileno(pTHX_ PerlIO *f)
1918 {
1919 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1920 }
1921
1922 char *
1923 PerlIO_modestr(PerlIO * f, char *buf)
1924 {
1925 char *s = buf;
1926 if (PerlIOValid(f)) {
1927 IV flags = PerlIOBase(f)->flags;
1928 if (flags & PERLIO_F_APPEND) {
1929 *s++ = 'a';
1930 if (flags & PERLIO_F_CANREAD) {
1931 *s++ = '+';
1932 }
1933 }
1934 else if (flags & PERLIO_F_CANREAD) {
1935 *s++ = 'r';
1936 if (flags & PERLIO_F_CANWRITE)
1937 *s++ = '+';
1938 }
1939 else if (flags & PERLIO_F_CANWRITE) {
1940 *s++ = 'w';
1941 if (flags & PERLIO_F_CANREAD) {
1942 *s++ = '+';
1943 }
1944 }
1945 #ifdef PERLIO_USING_CRLF
1946 if (!(flags & PERLIO_F_CRLF))
1947 *s++ = 'b';
1948 #endif
1949 }
1950 *s = '\0';
1951 return buf;
1952 }
1953
1954
1955 IV
1956 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1957 {
1958 PerlIOl *l = PerlIOBase(f);
1959 #if 0
1960 const char *omode = mode;
1961 char temp[8];
1962 #endif
1963 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1964 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1965 if (tab->Set_ptrcnt != NULL)
1966 l->flags |= PERLIO_F_FASTGETS;
1967 if (mode) {
1968 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
1969 mode++;
1970 switch (*mode++) {
1971 case 'r':
1972 l->flags |= PERLIO_F_CANREAD;
1973 break;
1974 case 'a':
1975 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1976 break;
1977 case 'w':
1978 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1979 break;
1980 default:
1981 SETERRNO(EINVAL, LIB_INVARG);
1982 return -1;
1983 }
1984 while (*mode) {
1985 switch (*mode++) {
1986 case '+':
1987 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1988 break;
1989 case 'b':
1990 l->flags &= ~PERLIO_F_CRLF;
1991 break;
1992 case 't':
1993 l->flags |= PERLIO_F_CRLF;
1994 break;
1995 default:
1996 SETERRNO(EINVAL, LIB_INVARG);
1997 return -1;
1998 }
1999 }
2000 }
2001 else {
2002 if (l->next) {
2003 l->flags |= l->next->flags &
2004 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2005 PERLIO_F_APPEND);
2006 }
2007 }
2008 #if 0
2009 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2010 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2011 l->flags, PerlIO_modestr(f, temp));
2012 #endif
2013 return 0;
2014 }
2015
2016 IV
2017 PerlIOBase_popped(pTHX_ PerlIO *f)
2018 {
2019 return 0;
2020 }
2021
2022 SSize_t
2023 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2024 {
2025 /*
2026 * Save the position as current head considers it
2027 */
2028 Off_t old = PerlIO_tell(f);
2029 SSize_t done;
2030 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
2031 PerlIOSelf(f, PerlIOBuf)->posn = old;
2032 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
2033 return done;
2034 }
2035
2036 SSize_t
2037 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2038 {
2039 STDCHAR *buf = (STDCHAR *) vbuf;
2040 if (f) {
2041 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2042 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2043 SETERRNO(EBADF, SS_IVCHAN);
2044 return 0;
2045 }
2046 while (count > 0) {
2047 SSize_t avail = PerlIO_get_cnt(f);
2048 SSize_t take = 0;
2049 if (avail > 0)
2050 take = ((SSize_t)count < avail) ? count : avail;
2051 if (take > 0) {
2052 STDCHAR *ptr = PerlIO_get_ptr(f);
2053 Copy(ptr, buf, take, STDCHAR);
2054 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2055 count -= take;
2056 buf += take;
2057 }
2058 if (count > 0 && avail <= 0) {
2059 if (PerlIO_fill(f) != 0)
2060 break;
2061 }
2062 }
2063 return (buf - (STDCHAR *) vbuf);
2064 }
2065 return 0;
2066 }
2067
2068 IV
2069 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2070 {
2071 return 0;
2072 }
2073
2074 IV
2075 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2076 {
2077 return -1;
2078 }
2079
2080 IV
2081 PerlIOBase_close(pTHX_ PerlIO *f)
2082 {
2083 IV code = -1;
2084 if (PerlIOValid(f)) {
2085 PerlIO *n = PerlIONext(f);
2086 code = PerlIO_flush(f);
2087 PerlIOBase(f)->flags &=
2088 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2089 while (PerlIOValid(n)) {
2090 PerlIO_funcs *tab = PerlIOBase(n)->tab;
2091 if (tab && tab->Close) {
2092 if ((*tab->Close)(aTHX_ n) != 0)
2093 code = -1;
2094 break;
2095 }
2096 else {
2097 PerlIOBase(n)->flags &=
2098 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2099 }
2100 n = PerlIONext(n);
2101 }
2102 }
2103 else {
2104 SETERRNO(EBADF, SS_IVCHAN);
2105 }
2106 return code;
2107 }
2108
2109 IV
2110 PerlIOBase_eof(pTHX_ PerlIO *f)
2111 {
2112 if (PerlIOValid(f)) {
2113 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2114 }
2115 return 1;
2116 }
2117
2118 IV
2119 PerlIOBase_error(pTHX_ PerlIO *f)
2120 {
2121 if (PerlIOValid(f)) {
2122 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2123 }
2124 return 1;
2125 }
2126
2127 void
2128 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2129 {
2130 if (PerlIOValid(f)) {
2131 PerlIO *n = PerlIONext(f);
2132 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2133 if (PerlIOValid(n))
2134 PerlIO_clearerr(n);
2135 }
2136 }
2137
2138 void
2139 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2140 {
2141 if (PerlIOValid(f)) {
2142 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2143 }
2144 }
2145
2146 SV *
2147 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2148 {
2149 if (!arg)
2150 return Nullsv;
2151 #ifdef sv_dup
2152 if (param) {
2153 return sv_dup(arg, param);
2154 }
2155 else {
2156 return newSVsv(arg);
2157 }
2158 #else
2159 return newSVsv(arg);
2160 #endif
2161 }
2162
2163 PerlIO *
2164 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2165 {
2166 PerlIO *nexto = PerlIONext(o);
2167 if (PerlIOValid(nexto)) {
2168 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2169 if (tab && tab->Dup)
2170 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2171 else
2172 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2173 }
2174 if (f) {
2175 PerlIO_funcs *self = PerlIOBase(o)->tab;
2176 SV *arg;
2177 char buf[8];
2178 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2179 self->name, (void*)f, (void*)o, (void*)param);
2180 if (self->Getarg)
2181 arg = (*self->Getarg)(aTHX_ o, param, flags);
2182 else {
2183 arg = Nullsv;
2184 }
2185 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2186 if (arg) {
2187 SvREFCNT_dec(arg);
2188 }
2189 }
2190 return f;
2191 }
2192
2193 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2194 #ifdef USE_THREADS
2195 perl_mutex PerlIO_mutex;
2196 #endif
2197 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2198
2199 void
2200 PerlIO_init(pTHX)
2201 {
2202 /* Place holder for stdstreams call ??? */
2203 #ifdef USE_THREADS
2204 MUTEX_INIT(&PerlIO_mutex);
2205 #endif
2206 }
2207
2208 void
2209 PerlIOUnix_refcnt_inc(int fd)
2210 {
2211 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2212 #ifdef USE_THREADS
2213 MUTEX_LOCK(&PerlIO_mutex);
2214 #endif
2215 PerlIO_fd_refcnt[fd]++;
2216 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2217 #ifdef USE_THREADS
2218 MUTEX_UNLOCK(&PerlIO_mutex);
2219 #endif
2220 }
2221 }
2222
2223 int
2224 PerlIOUnix_refcnt_dec(int fd)
2225 {
2226 int cnt = 0;
2227 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2228 #ifdef USE_THREADS
2229 MUTEX_LOCK(&PerlIO_mutex);
2230 #endif
2231 cnt = --PerlIO_fd_refcnt[fd];
2232 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2233 #ifdef USE_THREADS
2234 MUTEX_UNLOCK(&PerlIO_mutex);
2235 #endif
2236 }
2237 return cnt;
2238 }
2239
2240 void
2241 PerlIO_cleanup(pTHX)
2242 {
2243 int i;
2244 #ifdef USE_ITHREADS
2245 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2246 #else
2247 PerlIO_debug("Cleanup layers\n");
2248 #endif
2249 /* Raise STDIN..STDERR refcount so we don't close them */
2250 for (i=0; i < 3; i++)
2251 PerlIOUnix_refcnt_inc(i);
2252 PerlIO_cleantable(aTHX_ &PL_perlio);
2253 /* Restore STDIN..STDERR refcount */
2254 for (i=0; i < 3; i++)
2255 PerlIOUnix_refcnt_dec(i);
2256
2257 if (PL_known_layers) {
2258 PerlIO_list_free(aTHX_ PL_known_layers);
2259 PL_known_layers = NULL;
2260 }
2261 if(PL_def_layerlist) {
2262 PerlIO_list_free(aTHX_ PL_def_layerlist);
2263 PL_def_layerlist = NULL;
2264 }
2265 }
2266
2267
2268
2269 /*--------------------------------------------------------------------------------------*/
2270 /*
2271 * Bottom-most level for UNIX-like case
2272 */
2273
2274 typedef struct {
2275 struct _PerlIO base; /* The generic part */
2276 int fd; /* UNIX like file descriptor */
2277 int oflags; /* open/fcntl flags */
2278 } PerlIOUnix;
2279
2280 int
2281 PerlIOUnix_oflags(const char *mode)
2282 {
2283 int oflags = -1;
2284 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2285 mode++;
2286 switch (*mode) {
2287 case 'r':
2288 oflags = O_RDONLY;
2289 if (*++mode == '+') {
2290 oflags = O_RDWR;
2291 mode++;
2292 }
2293 break;
2294
2295 case 'w':
2296 oflags = O_CREAT | O_TRUNC;
2297 if (*++mode == '+') {
2298 oflags |= O_RDWR;
2299 mode++;
2300 }
2301 else
2302 oflags |= O_WRONLY;
2303 break;
2304
2305 case 'a':
2306 oflags = O_CREAT | O_APPEND;
2307 if (*++mode == '+') {
2308 oflags |= O_RDWR;
2309 mode++;
2310 }
2311 else
2312 oflags |= O_WRONLY;
2313 break;
2314 }
2315 if (*mode == 'b') {
2316 oflags |= O_BINARY;
2317 oflags &= ~O_TEXT;
2318 mode++;
2319 }
2320 else if (*mode == 't') {
2321 oflags |= O_TEXT;
2322 oflags &= ~O_BINARY;
2323 mode++;
2324 }
2325 /*
2326 * Always open in binary mode
2327 */
2328 oflags |= O_BINARY;
2329 if (*mode || oflags == -1) {
2330 SETERRNO(EINVAL, LIB_INVARG);
2331 oflags = -1;
2332 }
2333 return oflags;
2334 }
2335
2336 IV
2337 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2338 {
2339 return PerlIOSelf(f, PerlIOUnix)->fd;
2340 }
2341
2342 static void
2343 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2344 {
2345 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2346 #if defined(WIN32)
2347 Stat_t st;
2348 if (PerlLIO_fstat(fd, &st) == 0) {
2349 if (!S_ISREG(st.st_mode)) {
2350 PerlIO_debug("%d is not regular file\n",fd);
2351 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2352 }
2353 else {
2354 PerlIO_debug("%d _is_ a regular file\n",fd);
2355 }
2356 }
2357 #endif
2358 s->fd = fd;
2359 s->oflags = imode;
2360 PerlIOUnix_refcnt_inc(fd);
2361 }
2362
2363 IV
2364 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2365 {
2366 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2367 if (*PerlIONext(f)) {
2368 /* We never call down so do any pending stuff now */
2369 PerlIO_flush(PerlIONext(f));
2370 /*
2371 * XXX could (or should) we retrieve the oflags from the open file
2372 * handle rather than believing the "mode" we are passed in? XXX
2373 * Should the value on NULL mode be 0 or -1?
2374 */
2375 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2376 mode ? PerlIOUnix_oflags(mode) : -1);
2377 }
2378 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2379
2380 return code;
2381 }
2382
2383 IV
2384 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2385 {
2386 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2387 Off_t new;
2388 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2389 #ifdef ESPIPE
2390 SETERRNO(ESPIPE, LIB_INVARG);
2391 #else
2392 SETERRNO(EINVAL, LIB_INVARG);
2393 #endif
2394 return -1;
2395 }
2396 new = PerlLIO_lseek(fd, offset, whence);
2397 if (new == (Off_t) - 1)
2398 {
2399 return -1;
2400 }
2401 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2402 return 0;
2403 }
2404
2405 PerlIO *
2406 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2407 IV n, const char *mode, int fd, int imode,
2408 int perm, PerlIO *f, int narg, SV **args)
2409 {
2410 if (PerlIOValid(f)) {
2411 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2412 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2413 }
2414 if (narg > 0) {
2415 char *path = SvPV_nolen(*args);
2416 if (*mode == IoTYPE_NUMERIC)
2417 mode++;
2418 else {
2419 imode = PerlIOUnix_oflags(mode);
2420 perm = 0666;
2421 }
2422 if (imode != -1) {
2423 fd = PerlLIO_open3(path, imode, perm);
2424 }
2425 }
2426 if (fd >= 0) {
2427 if (*mode == IoTYPE_IMPLICIT)
2428 mode++;
2429 if (!f) {
2430 f = PerlIO_allocate(aTHX);
2431 }
2432 if (!PerlIOValid(f)) {
2433 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2434 return NULL;
2435 }
2436 }
2437 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2438 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2439 if (*mode == IoTYPE_APPEND)
2440 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2441 return f;
2442 }
2443 else {
2444 if (f) {
2445 /*
2446 * FIXME: pop layers ???
2447 */
2448 }
2449 return NULL;
2450 }
2451 }
2452
2453 PerlIO *
2454 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2455 {
2456 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2457 int fd = os->fd;
2458 if (flags & PERLIO_DUP_FD) {
2459 fd = PerlLIO_dup(fd);
2460 }
2461 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2462 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2463 if (f) {
2464 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2465 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2466 return f;
2467 }
2468 }
2469 return NULL;
2470 }
2471
2472
2473 SSize_t
2474 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2475 {
2476 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2477 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2478 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2479 return 0;
2480 }
2481 while (1) {
2482 SSize_t len = PerlLIO_read(fd, vbuf, count);
2483 if (len >= 0 || errno != EINTR) {
2484 if (len < 0) {
2485 if (errno != EAGAIN) {
2486 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2487 }
2488 }
2489 else if (len == 0 && count != 0) {
2490 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2491 SETERRNO(0,0);
2492 }
2493 return len;
2494 }
2495 PERL_ASYNC_CHECK();
2496 }
2497 }
2498
2499 SSize_t
2500 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2501 {
2502 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2503 while (1) {
2504 SSize_t len = PerlLIO_write(fd, vbuf, count);
2505 if (len >= 0 || errno != EINTR) {
2506 if (len < 0) {
2507 if (errno != EAGAIN) {
2508 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2509 }
2510 }
2511 return len;
2512 }
2513 PERL_ASYNC_CHECK();
2514 }
2515 }
2516
2517 Off_t
2518 PerlIOUnix_tell(pTHX_ PerlIO *f)
2519 {
2520 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2521 }
2522
2523
2524 IV
2525 PerlIOUnix_close(pTHX_ PerlIO *f)
2526 {
2527 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2528 int code = 0;
2529 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2530 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2531 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2532 return 0;
2533 }
2534 }
2535 else {
2536 SETERRNO(EBADF,SS_IVCHAN);
2537 return -1;
2538 }
2539 while (PerlLIO_close(fd) != 0) {
2540 if (errno != EINTR) {
2541 code = -1;
2542 break;
2543 }
2544 PERL_ASYNC_CHECK();
2545 }
2546 if (code == 0) {
2547 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2548 }
2549 return code;
2550 }
2551
2552 PerlIO_funcs PerlIO_unix = {
2553 sizeof(PerlIO_funcs),
2554 "unix",
2555 sizeof(PerlIOUnix),
2556 PERLIO_K_RAW,
2557 PerlIOUnix_pushed,
2558 PerlIOBase_popped,
2559 PerlIOUnix_open,
2560 PerlIOBase_binmode, /* binmode */
2561 NULL,
2562 PerlIOUnix_fileno,
2563 PerlIOUnix_dup,
2564 PerlIOUnix_read,
2565 PerlIOBase_unread,
2566 PerlIOUnix_write,
2567 PerlIOUnix_seek,
2568 PerlIOUnix_tell,
2569 PerlIOUnix_close,
2570 PerlIOBase_noop_ok, /* flush */
2571 PerlIOBase_noop_fail, /* fill */
2572 PerlIOBase_eof,
2573 PerlIOBase_error,
2574 PerlIOBase_clearerr,
2575 PerlIOBase_setlinebuf,
2576 NULL, /* get_base */
2577 NULL, /* get_bufsiz */
2578 NULL, /* get_ptr */
2579 NULL, /* get_cnt */
2580 NULL, /* set_ptrcnt */
2581 };
2582
2583 /*--------------------------------------------------------------------------------------*/
2584 /*
2585 * stdio as a layer
2586 */
2587
2588 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2589 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2590 broken by the last second glibc 2.3 fix
2591 */
2592 #define STDIO_BUFFER_WRITABLE
2593 #endif
2594
2595
2596 typedef struct {
2597 struct _PerlIO base;
2598 FILE *stdio; /* The stream */
2599 } PerlIOStdio;
2600
2601 IV
2602 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2603 {
2604 FILE *s;
2605 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2606 return PerlSIO_fileno(s);
2607 }
2608 errno = EBADF;
2609 return -1;
2610 }
2611
2612 char *
2613 PerlIOStdio_mode(const char *mode, char *tmode)
2614 {
2615 char *ret = tmode;
2616 if (mode) {
2617 while (*mode) {
2618 *tmode++ = *mode++;
2619 }
2620 }
2621 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2622 *tmode++ = 'b';
2623 #endif
2624 *tmode = '\0';
2625 return ret;
2626 }
2627
2628 IV
2629 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2630 {
2631 PerlIO *n;
2632 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2633 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2634 if (toptab == tab) {
2635 /* Top is already stdio - pop self (duplicate) and use original */
2636 PerlIO_pop(aTHX_ f);
2637 return 0;
2638 } else {
2639 int fd = PerlIO_fileno(n);
2640 char tmode[8];
2641 FILE *stdio;
2642 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2643 mode = PerlIOStdio_mode(mode, tmode)))) {
2644 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2645 /* We never call down so do any pending stuff now */
2646 PerlIO_flush(PerlIONext(f));
2647 }
2648 else {
2649 return -1;
2650 }
2651 }
2652 }
2653 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2654 }
2655
2656
2657 PerlIO *
2658 PerlIO_importFILE(FILE *stdio, const char *mode)
2659 {
2660 dTHX;
2661 PerlIO *f = NULL;
2662 if (stdio) {
2663 PerlIOStdio *s;
2664 if (!mode || !*mode) {
2665 /* We need to probe to see how we can open the stream
2666 so start with read/write and then try write and read
2667 we dup() so that we can fclose without loosing the fd.
2668
2669 Note that the errno value set by a failing fdopen
2670 varies between stdio implementations.
2671 */
2672 int fd = PerlLIO_dup(fileno(stdio));
2673 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2674 if (!f2) {
2675 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2676 }
2677 if (!f2) {
2678 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2679 }
2680 if (!f2) {
2681 /* Don't seem to be able to open */
2682 PerlLIO_close(fd);
2683 return f;
2684 }
2685 fclose(f2);
2686 }
2687 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2688 s = PerlIOSelf(f, PerlIOStdio);
2689 s->stdio = stdio;
2690 }
2691 }
2692 return f;
2693 }
2694
2695 PerlIO *
2696 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2697 IV n, const char *mode, int fd, int imode,
2698 int perm, PerlIO *f, int narg, SV **args)
2699 {
2700 char tmode[8];
2701 if (PerlIOValid(f)) {
2702 char *path = SvPV_nolen(*args);
2703 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2704 FILE *stdio;
2705 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2706 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2707 s->stdio);
2708 if (!s->stdio)
2709 return NULL;
2710 s->stdio = stdio;
2711 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2712 return f;
2713 }
2714 else {
2715 if (narg > 0) {
2716 char *path = SvPV_nolen(*args);
2717 if (*mode == IoTYPE_NUMERIC) {
2718 mode++;
2719 fd = PerlLIO_open3(path, imode, perm);
2720 }
2721 else {
2722 FILE *stdio;
2723 bool appended = FALSE;
2724 #ifdef __CYGWIN__
2725 /* Cygwin wants its 'b' early. */
2726 appended = TRUE;
2727 mode = PerlIOStdio_mode(mode, tmode);
2728 #endif
2729 stdio = PerlSIO_fopen(path, mode);
2730 if (stdio) {
2731 PerlIOStdio *s;
2732 if (!f) {
2733 f = PerlIO_allocate(aTHX);
2734 }
2735 if (!appended)
2736 mode = PerlIOStdio_mode(mode, tmode);
2737 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2738 if (f) {
2739 s = PerlIOSelf(f, PerlIOStdio);
2740 s->stdio = stdio;
2741 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2742 }
2743 return f;
2744 }
2745 else {
2746 return NULL;
2747 }
2748 }
2749 }
2750 if (fd >= 0) {
2751 FILE *stdio = NULL;
2752 int init = 0;
2753 if (*mode == IoTYPE_IMPLICIT) {
2754 init = 1;
2755 mode++;
2756 }
2757 if (init) {
2758 switch (fd) {
2759 case 0:
2760 stdio = PerlSIO_stdin;
2761 break;
2762 case 1:
2763 stdio = PerlSIO_stdout;
2764 break;
2765 case 2:
2766 stdio = PerlSIO_stderr;
2767 break;
2768 }
2769 }
2770 else {
2771 stdio = PerlSIO_fdopen(fd, mode =
2772 PerlIOStdio_mode(mode, tmode));
2773 }
2774 if (stdio) {
2775 PerlIOStdio *s;
2776 if (!f) {
2777 f = PerlIO_allocate(aTHX);
2778 }
2779 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2780 s = PerlIOSelf(f, PerlIOStdio);
2781 s->stdio = stdio;
2782 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2783 }
2784 return f;
2785 }
2786 }
2787 }
2788 return NULL;
2789 }
2790
2791 PerlIO *
2792 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2793 {
2794 /* This assumes no layers underneath - which is what
2795 happens, but is not how I remember it. NI-S 2001/10/16
2796 */
2797 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2798 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2799 int fd = fileno(stdio);
2800 char mode[8];
2801 if (flags & PERLIO_DUP_FD) {
2802 int dfd = PerlLIO_dup(fileno(stdio));
2803 if (dfd >= 0) {
2804 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2805 goto set_this;
2806 }
2807 else {
2808 /* FIXME: To avoid messy error recovery if dup fails
2809 re-use the existing stdio as though flag was not set
2810 */
2811 }
2812 }
2813 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2814 set_this:
2815 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2816 PerlIOUnix_refcnt_inc(fileno(stdio));
2817 }
2818 return f;
2819 }
2820
2821 static int
2822 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2823 {
2824 /* XXX this could use PerlIO_canset_fileno() and
2825 * PerlIO_set_fileno() support from Configure
2826 */
2827 # if defined(__GLIBC__)
2828 /* There may be a better way for GLIBC:
2829 - libio.h defines a flag to not close() on cleanup
2830 */
2831 f->_fileno = -1;
2832 return 1;
2833 # elif defined(__sun__)
2834 return 0;
2835 # elif defined(__hpux)
2836 f->__fileH = 0xff;
2837 f->__fileL = 0xff;
2838 return 1;
2839 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2840 your platform does not have special entry try this one.
2841 [For OSF only have confirmation for Tru64 (alpha)
2842 but assume other OSFs will be similar.]
2843 */
2844 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2845 f->_file = -1;
2846 return 1;
2847 # elif defined(__FreeBSD__)
2848 /* There may be a better way on FreeBSD:
2849 - we could insert a dummy func in the _close function entry
2850 f->_close = (int (*)(void *)) dummy_close;
2851 */
2852 f->_file = -1;
2853 return 1;
2854 # elif defined(__EMX__)
2855 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2856 f->_handle = -1;
2857 return 1;
2858 # elif defined(__CYGWIN__)
2859 /* There may be a better way on CYGWIN:
2860 - we could insert a dummy func in the _close function entry
2861 f->_close = (int (*)(void *)) dummy_close;
2862 */
2863 f->_file = -1;
2864 return 1;
2865 # elif defined(WIN32)
2866 # if defined(__BORLANDC__)
2867 f->fd = PerlLIO_dup(fileno(f));
2868 # elif defined(UNDER_CE)
2869 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2870 structure at all
2871 */
2872 # else
2873 f->_file = -1;
2874 # endif
2875 return 1;
2876 # else
2877 #if 0
2878 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2879 (which isn't thread safe) instead
2880 */
2881 # error "Don't know how to set FILE.fileno on your platform"
2882 #endif
2883 return 0;
2884 # endif
2885 }
2886
2887 IV
2888 PerlIOStdio_close(pTHX_ PerlIO *f)
2889 {
2890 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2891 if (!stdio) {
2892 errno = EBADF;
2893 return -1;
2894 }
2895 else {
2896 int fd = fileno(stdio);
2897 int socksfd = 0;
2898 int invalidate = 0;
2899 IV result = 0;
2900 int saveerr = 0;
2901 int dupfd = 0;
2902 #ifdef SOCKS5_VERSION_NAME
2903 /* Socks lib overrides close() but stdio isn't linked to
2904 that library (though we are) - so we must call close()
2905 on sockets on stdio's behalf.
2906 */
2907 int optval;
2908 Sock_size_t optlen = sizeof(int);
2909 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2910 socksfd = 1;
2911 invalidate = 1;
2912 }
2913 #endif
2914 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2915 /* File descriptor still in use */
2916 invalidate = 1;
2917 socksfd = 0;
2918 }
2919 if (invalidate) {
2920 /* For STD* handles don't close the stdio at all
2921 this is because we have shared the FILE * too
2922 */
2923 if (stdio == stdin) {
2924 /* Some stdios are buggy fflush-ing inputs */
2925 return 0;
2926 }
2927 else if (stdio == stdout || stdio == stderr) {
2928 return PerlIO_flush(f);
2929 }
2930 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2931 Use Sarathy's trick from maint-5.6 to invalidate the
2932 fileno slot of the FILE *
2933 */
2934 result = PerlIO_flush(f);
2935 saveerr = errno;
2936 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
2937 dupfd = PerlLIO_dup(fd);
2938 }
2939 }
2940 result = PerlSIO_fclose(stdio);
2941 /* We treat error from stdio as success if we invalidated
2942 errno may NOT be expected EBADF
2943 */
2944 if (invalidate && result != 0) {
2945 errno = saveerr;
2946 result = 0;
2947 }
2948 if (socksfd) {
2949 /* in SOCKS case let close() determine return value */
2950 result = close(fd);
2951 }
2952 if (dupfd) {
2953 PerlLIO_dup2(dupfd,fd);
2954 PerlLIO_close(dupfd);
2955 }
2956 return result;
2957 }
2958 }
2959
2960 SSize_t
2961 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2962 {
2963 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2964 SSize_t got = 0;
2965 for (;;) {
2966 if (count == 1) {
2967 STDCHAR *buf = (STDCHAR *) vbuf;
2968 /*
2969 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2970 * stdio does not do that for fread()
2971 */
2972 int ch = PerlSIO_fgetc(s);
2973 if (ch != EOF) {
2974 *buf = ch;
2975 got = 1;
2976 }
2977 }
2978 else
2979 got = PerlSIO_fread(vbuf, 1, count, s);
2980 if (got == 0 && PerlSIO_ferror(s))
2981 got = -1;
2982 if (got >= 0 || errno != EINTR)
2983 break;
2984 PERL_ASYNC_CHECK();
2985 SETERRNO(0,0); /* just in case */
2986 }
2987 return got;
2988 }
2989
2990 SSize_t
2991 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2992 {
2993 SSize_t unread = 0;
2994 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2995
2996 #ifdef STDIO_BUFFER_WRITABLE
2997 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2998 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2999 STDCHAR *base = PerlIO_get_base(f);
3000 SSize_t cnt = PerlIO_get_cnt(f);
3001 STDCHAR *ptr = PerlIO_get_ptr(f);
3002 SSize_t avail = ptr - base;
3003 if (avail > 0) {
3004 if (avail > count) {
3005 avail = count;
3006 }
3007 ptr -= avail;
3008 Move(buf-avail,ptr,avail,STDCHAR);
3009 count -= avail;
3010 unread += avail;
3011 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3012 if (PerlSIO_feof(s) && unread >= 0)
3013 PerlSIO_clearerr(s);
3014 }
3015 }
3016 else
3017 #endif
3018 if (PerlIO_has_cntptr(f)) {
3019 /* We can get pointer to buffer but not its base
3020 Do ungetc() but check chars are ending up in the
3021 buffer
3022 */
3023 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3024 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3025 while (count > 0) {
3026 int ch = *--buf & 0xFF;
3027 if (ungetc(ch,s) != ch) {
3028 /* ungetc did not work */
3029 break;
3030 }
3031 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3032 /* Did not change pointer as expected */
3033 fgetc(s); /* get char back again */
3034 break;
3035 }
3036 /* It worked ! */
3037 count--;
3038 unread++;
3039 }
3040 }
3041
3042 if (count > 0) {
3043 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3044 }
3045 return unread;
3046 }
3047
3048 SSize_t
3049 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3050 {
3051 SSize_t got;
3052 for (;;) {
3053 got = PerlSIO_fwrite(vbuf, 1, count,
3054 PerlIOSelf(f, PerlIOStdio)->stdio);
3055 if (got >= 0 || errno != EINTR)
3056 break;
3057 PERL_ASYNC_CHECK();
3058 SETERRNO(0,0); /* just in case */
3059 }
3060 return got;
3061 }
3062
3063 IV
3064 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3065 {
3066 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3067 return PerlSIO_fseek(stdio, offset, whence);
3068 }
3069
3070 Off_t
3071 PerlIOStdio_tell(pTHX_ PerlIO *f)
3072 {
3073 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3074 return PerlSIO_ftell(stdio);
3075 }
3076
3077 IV
3078 PerlIOStdio_flush(pTHX_ PerlIO *f)
3079 {
3080 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3081 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3082 return PerlSIO_fflush(stdio);
3083 }
3084 else {
3085 #if 0
3086 /*
3087 * FIXME: This discards ungetc() and pre-read stuff which is not
3088 * right if this is just a "sync" from a layer above Suspect right
3089 * design is to do _this_ but not have layer above flush this
3090 * layer read-to-read
3091 */
3092 /*
3093 * Not writeable - sync by attempting a seek
3094 */
3095 int err = errno;
3096 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3097 errno = err;
3098 #endif
3099 }
3100 return 0;
3101 }
3102
3103 IV
3104 PerlIOStdio_eof(pTHX_ PerlIO *f)
3105 {
3106 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3107 }
3108
3109 IV
3110 PerlIOStdio_error(pTHX_ PerlIO *f)
3111 {
3112 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3113 }
3114
3115 void
3116 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3117 {
3118 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3119 }
3120
3121 void
3122 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3123 {
3124 #ifdef HAS_SETLINEBUF
3125 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3126 #else
3127 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3128 #endif
3129 }
3130
3131 #ifdef FILE_base
3132 STDCHAR *
3133 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3134 {
3135 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3136 return (STDCHAR*)PerlSIO_get_base(stdio);
3137 }
3138
3139 Size_t
3140 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3141 {
3142 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3143 return PerlSIO_get_bufsiz(stdio);
3144 }
3145 #endif
3146
3147 #ifdef USE_STDIO_PTR
3148 STDCHAR *
3149 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3150 {
3151 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3152 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3153 }
3154
3155 SSize_t
3156 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3157 {
3158 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3159 return PerlSIO_get_cnt(stdio);
3160 }
3161
3162 void
3163 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3164 {
3165 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3166 if (ptr != NULL) {
3167 #ifdef STDIO_PTR_LVALUE
3168 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3169 #ifdef STDIO_PTR_LVAL_SETS_CNT
3170 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3171 assert(PerlSIO_get_cnt(stdio) == (cnt));
3172 }
3173 #endif
3174 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3175 /*
3176 * Setting ptr _does_ change cnt - we are done
3177 */
3178 return;
3179 #endif
3180 #else /* STDIO_PTR_LVALUE */
3181 PerlProc_abort();
3182 #endif /* STDIO_PTR_LVALUE */
3183 }
3184 /*
3185 * Now (or only) set cnt
3186 */
3187 #ifdef STDIO_CNT_LVALUE
3188 PerlSIO_set_cnt(stdio, cnt);
3189 #else /* STDIO_CNT_LVALUE */
3190 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3191 PerlSIO_set_ptr(stdio,
3192 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3193 cnt));
3194 #else /* STDIO_PTR_LVAL_SETS_CNT */
3195 PerlProc_abort();
3196 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3197 #endif /* STDIO_CNT_LVALUE */
3198 }
3199
3200
3201 #endif
3202
3203 IV
3204 PerlIOStdio_fill(pTHX_ PerlIO *f)
3205 {
3206 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3207 int c;
3208 /*
3209 * fflush()ing read-only streams can cause trouble on some stdio-s
3210 */
3211 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3212 if (PerlSIO_fflush(stdio) != 0)
3213 return EOF;
3214 }
3215 c = PerlSIO_fgetc(stdio);
3216 if (c == EOF)
3217 return EOF;
3218
3219 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3220
3221 #ifdef STDIO_BUFFER_WRITABLE
3222 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3223 /* Fake ungetc() to the real buffer in case system's ungetc
3224 goes elsewhere
3225 */
3226 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3227 SSize_t cnt = PerlSIO_get_cnt(stdio);
3228 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3229 if (ptr == base+1) {
3230 *--ptr = (STDCHAR) c;
3231 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3232 if (PerlSIO_feof(stdio))
3233 PerlSIO_clearerr(stdio);
3234 return 0;
3235 }
3236 }
3237 else
3238 #endif
3239 if (PerlIO_has_cntptr(f)) {
3240 STDCHAR ch = c;
3241 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3242 return 0;
3243 }
3244 }
3245 #endif
3246
3247 #if defined(VMS)
3248 /* An ungetc()d char is handled separately from the regular
3249 * buffer, so we stuff it in the buffer ourselves.
3250 * Should never get called as should hit code above
3251 */
3252 *(--((*stdio)->_ptr)) = (unsigned char) c;
3253 (*stdio)->_cnt++;
3254 #else
3255 /* If buffer snoop scheme above fails fall back to
3256 using ungetc().
3257 */
3258 if (PerlSIO_ungetc(c, stdio) != c)
3259 return EOF;
3260 #endif
3261 return 0;
3262 }
3263
3264
3265
3266 PerlIO_funcs PerlIO_stdio = {
3267 sizeof(PerlIO_funcs),
3268 "stdio",
3269 sizeof(PerlIOStdio),
3270 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3271 PerlIOStdio_pushed,
3272 PerlIOBase_popped,
3273 PerlIOStdio_open,
3274 PerlIOBase_binmode, /* binmode */
3275 NULL,
3276 PerlIOStdio_fileno,
3277 PerlIOStdio_dup,
3278 PerlIOStdio_read,
3279 PerlIOStdio_unread,
3280 PerlIOStdio_write,
3281 PerlIOStdio_seek,
3282 PerlIOStdio_tell,
3283 PerlIOStdio_close,
3284 PerlIOStdio_flush,
3285 PerlIOStdio_fill,
3286 PerlIOStdio_eof,
3287 PerlIOStdio_error,
3288 PerlIOStdio_clearerr,
3289 PerlIOStdio_setlinebuf,
3290 #ifdef FILE_base
3291 PerlIOStdio_get_base,
3292 PerlIOStdio_get_bufsiz,
3293 #else
3294 NULL,
3295 NULL,
3296 #endif
3297 #ifdef USE_STDIO_PTR
3298 PerlIOStdio_get_ptr,
3299 PerlIOStdio_get_cnt,
3300 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3301 PerlIOStdio_set_ptrcnt,
3302 # else
3303 NULL,
3304 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3305 #else
3306 NULL,
3307 NULL,
3308 NULL,
3309 #endif /* USE_STDIO_PTR */
3310 };
3311
3312 /* Note that calls to PerlIO_exportFILE() are reversed using
3313 * PerlIO_releaseFILE(), not importFILE. */
3314 FILE *
3315 PerlIO_exportFILE(PerlIO * f, const char *mode)
3316 {
3317 dTHX;
3318 FILE *stdio = NULL;
3319 if (PerlIOValid(f)) {
3320 char buf[8];
3321 PerlIO_flush(f);
3322 if (!mode || !*mode) {
3323 mode = PerlIO_modestr(f, buf);
3324 }
3325 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3326 if (stdio) {
3327 PerlIOl *l = *f;
3328 PerlIO *f2;
3329 /* De-link any lower layers so new :stdio sticks */
3330 *f = NULL;
3331 if ((f2 = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3332 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3333 s->stdio = stdio;
3334 /* Link previous lower layers under new one */
3335 *PerlIONext(f) = l;
3336 }
3337 else {
3338 /* restore layers list */
3339 *f = l;
3340 }
3341 }
3342 }
3343 return stdio;
3344 }
3345
3346
3347 FILE *
3348 PerlIO_findFILE(PerlIO *f)
3349 {
3350 PerlIOl *l = *f;
3351 while (l) {
3352 if (l->tab == &PerlIO_stdio) {
3353 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3354 return s->stdio;
3355 }
3356 l = *PerlIONext(&l);
3357 }
3358 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3359 return PerlIO_exportFILE(f, Nullch);
3360 }
3361
3362 /* Use this to reverse PerlIO_exportFILE calls. */
3363 void
3364 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3365 {
3366 PerlIOl *l;
3367 while ((l = *p)) {
3368 if (l->tab == &PerlIO_stdio) {
3369 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3370 if (s->stdio == f) {
3371 dTHX;
3372 PerlIO_pop(aTHX_ p);
3373 return;
3374 }
3375 }
3376 p = PerlIONext(p);
3377 }
3378 return;
3379 }
3380
3381 /*--------------------------------------------------------------------------------------*/
3382 /*
3383 * perlio buffer layer
3384 */
3385
3386 IV
3387 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3388 {
3389 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3390 int fd = PerlIO_fileno(f);
3391 if (fd >= 0 && PerlLIO_isatty(fd)) {
3392 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3393 }
3394 if (*PerlIONext(f)) {
3395 Off_t posn = PerlIO_tell(PerlIONext(f));
3396 if (posn != (Off_t) - 1) {
3397 b->posn = posn;
3398 }
3399 }
3400 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3401 }
3402
3403 PerlIO *
3404 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3405 IV n, const char *mode, int fd, int imode, int perm,
3406 PerlIO *f, int narg, SV **args)
3407 {
3408 if (PerlIOValid(f)) {
3409 PerlIO *next = PerlIONext(f);
3410 PerlIO_funcs *tab =
3411 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3412 if (tab && tab->Open)
3413 next =
3414 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3415 next, narg, args);
3416 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3417 return NULL;
3418 }
3419 }
3420 else {
3421 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3422 int init = 0;
3423 if (*mode == IoTYPE_IMPLICIT) {
3424 init = 1;
3425 /*
3426 * mode++;
3427 */
3428 }
3429 if (tab && tab->Open)
3430 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3431 f, narg, args);
3432 else
3433 SETERRNO(EINVAL, LIB_INVARG);
3434 if (f) {
3435 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3436 /*
3437 * if push fails during open, open fails. close will pop us.
3438 */
3439 PerlIO_close (f);
3440 return NULL;
3441 } else {
3442 fd = PerlIO_fileno(f);
3443 if (init && fd == 2) {
3444 /*
3445 * Initial stderr is unbuffered
3446 */
3447 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3448 }
3449 #ifdef PERLIO_USING_CRLF
3450 # ifdef PERLIO_IS_BINMODE_FD
3451 if (PERLIO_IS_BINMODE_FD(fd))
3452 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3453 else
3454 # endif
3455 /*
3456 * do something about failing setmode()? --jhi
3457 */
3458 PerlLIO_setmode(fd, O_BINARY);
3459 #endif
3460 }
3461 }
3462 }
3463 return f;
3464 }
3465
3466 /*
3467 * This "flush" is akin to sfio's sync in that it handles files in either
3468 * read or write state
3469 */
3470 IV
3471 PerlIOBuf_flush(pTHX_ PerlIO *f)
3472 {
3473 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3474 int code = 0;
3475 PerlIO *n = PerlIONext(f);
3476 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3477 /*
3478 * write() the buffer
3479 */
3480 STDCHAR *buf = b->buf;
3481 STDCHAR *p = buf;
3482 while (p < b->ptr) {
3483 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3484 if (count > 0) {
3485 p += count;
3486 }
3487 else if (count < 0 || PerlIO_error(n)) {
3488 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3489 code = -1;
3490 break;
3491 }
3492 }
3493 b->posn += (p - buf);
3494 }
3495 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3496 STDCHAR *buf = PerlIO_get_base(f);
3497 /*
3498 * Note position change
3499 */
3500 b->posn += (b->ptr - buf);
3501 if (b->ptr < b->end) {
3502 /* We did not consume all of it - try and seek downstream to
3503 our logical position
3504 */
3505 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3506 /* Reload n as some layers may pop themselves on seek */
3507 b->posn = PerlIO_tell(n = PerlIONext(f));
3508 }
3509 else {
3510 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3511 data is lost for good - so return saying "ok" having undone
3512 the position adjust
3513 */
3514 b->posn -= (b->ptr - buf);
3515 return code;
3516 }
3517 }
3518 }
3519 b->ptr = b->end = b->buf;
3520 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3521 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3522 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3523 code = -1;
3524 return code;
3525 }
3526
3527 IV
3528 PerlIOBuf_fill(pTHX_ PerlIO *f)
3529 {
3530 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3531 PerlIO *n = PerlIONext(f);
3532 SSize_t avail;
3533 /*
3534 * Down-stream flush is defined not to loose read data so is harmless.
3535 * we would not normally be fill'ing if there was data left in anycase.
3536 */
3537 if (PerlIO_flush(f) != 0)
3538 return -1;
3539 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3540 PerlIOBase_flush_linebuf(aTHX);
3541
3542 if (!b->buf)
3543 PerlIO_get_base(f); /* allocate via vtable */
3544
3545 b->ptr = b->end = b->buf;
3546
3547 if (!PerlIOValid(n)) {
3548 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3549 return -1;
3550 }
3551
3552 if (PerlIO_fast_gets(n)) {
3553 /*
3554 * Layer below is also buffered. We do _NOT_ want to call its
3555 * ->Read() because that will loop till it gets what we asked for
3556 * which may hang on a pipe etc. Instead take anything it has to
3557 * hand, or ask it to fill _once_.
3558 */
3559 avail = PerlIO_get_cnt(n);
3560 if (avail <= 0) {
3561 avail = PerlIO_fill(n);
3562 if (avail == 0)
3563 avail = PerlIO_get_cnt(n);
3564 else {
3565 if (!PerlIO_error(n) && PerlIO_eof(n))
3566 avail = 0;
3567 }
3568 }
3569 if (avail > 0) {
3570 STDCHAR *ptr = PerlIO_get_ptr(n);
3571 SSize_t cnt = avail;
3572 if (avail > (SSize_t)b->bufsiz)
3573 avail = b->bufsiz;
3574 Copy(ptr, b->buf, avail, STDCHAR);
3575 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3576 }
3577 }
3578 else {
3579 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3580 }
3581 if (avail <= 0) {
3582 if (avail == 0)
3583 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3584 else
3585 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3586 return -1;
3587 }
3588 b->end = b->buf + avail;
3589 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3590 return 0;
3591 }
3592
3593 SSize_t
3594 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3595 {
3596 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3597 if (PerlIOValid(f)) {
3598 if (!b->ptr)
3599 PerlIO_get_base(f);
3600 return PerlIOBase_read(aTHX_ f, vbuf, count);
3601 }
3602 return 0;
3603 }
3604
3605 SSize_t
3606 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3607 {
3608 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3609 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3610 SSize_t unread = 0;
3611 SSize_t avail;
3612 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3613 PerlIO_flush(f);
3614 if (!b->buf)
3615 PerlIO_get_base(f);
3616 if (b->buf) {
3617 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3618 /*
3619 * Buffer is already a read buffer, we can overwrite any chars
3620 * which have been read back to buffer start
3621 */
3622 avail = (b->ptr - b->buf);
3623 }
3624 else {
3625 /*
3626 * Buffer is idle, set it up so whole buffer is available for
3627 * unread
3628 */
3629 avail = b->bufsiz;
3630 b->end = b->buf + avail;
3631 b->ptr = b->end;
3632 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3633 /*
3634 * Buffer extends _back_ from where we are now
3635 */
3636 b->posn -= b->bufsiz;
3637 }
3638 if (avail > (SSize_t) count) {
3639 /*
3640 * If we have space for more than count, just move count
3641 */
3642 avail = count;
3643 }
3644 if (avail > 0) {
3645 b->ptr -= avail;
3646 buf -= avail;
3647 /*
3648 * In simple stdio-like ungetc() case chars will be already
3649 * there
3650 */
3651 if (buf != b->ptr) {
3652 Copy(buf, b->ptr, avail, STDCHAR);
3653 }
3654 count -= avail;
3655 unread += avail;
3656 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3657 }
3658 }
3659 if (count > 0) {
3660 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3661 }
3662 return unread;
3663 }
3664
3665 SSize_t
3666 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3667 {
3668 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3669 const STDCHAR *buf = (const STDCHAR *) vbuf;
3670 const STDCHAR *flushptr = buf;
3671 Size_t written = 0;
3672 if (!b->buf)
3673 PerlIO_get_base(f);
3674 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3675 return 0;
3676 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3677 if (PerlIO_flush(f) != 0) {
3678 return 0;
3679 }
3680 }
3681 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3682 flushptr = buf + count;
3683 while (flushptr > buf && *(flushptr - 1) != '\n')
3684 --flushptr;
3685 }
3686 while (count > 0) {
3687 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3688 if ((SSize_t) count < avail)
3689 avail = count;
3690 if (flushptr > buf && flushptr <= buf + avail)
3691 avail = flushptr - buf;
3692 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3693 if (avail) {
3694 Copy(buf, b->ptr, avail, STDCHAR);
3695 count -= avail;
3696 buf += avail;
3697 written += avail;
3698 b->ptr += avail;
3699 if (buf == flushptr)
3700 PerlIO_flush(f);
3701 }
3702 if (b->ptr >= (b->buf + b->bufsiz))
3703 PerlIO_flush(f);
3704 }
3705 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3706 PerlIO_flush(f);
3707 return written;
3708 }
3709
3710 IV
3711 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3712 {
3713 IV code;
3714 if ((code = PerlIO_flush(f)) == 0) {
3715 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3716 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3717 code = PerlIO_seek(PerlIONext(f), offset, whence);
3718 if (code == 0) {
3719 b->posn = PerlIO_tell(PerlIONext(f));
3720 }
3721 }
3722 return code;
3723 }
3724
3725 Off_t
3726 PerlIOBuf_tell(pTHX_ PerlIO *f)
3727 {
3728 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3729 /*
3730 * b->posn is file position where b->buf was read, or will be written
3731 */
3732 Off_t posn = b->posn;
3733 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3734 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3735 #if 1
3736 /* As O_APPEND files are normally shared in some sense it is better
3737 to flush :
3738 */
3739 PerlIO_flush(f);
3740 #else
3741 /* when file is NOT shared then this is sufficient */
3742 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3743 #endif
3744 posn = b->posn = PerlIO_tell(PerlIONext(f));
3745 }
3746 if (b->buf) {
3747 /*
3748 * If buffer is valid adjust position by amount in buffer
3749 */
3750 posn += (b->ptr - b->buf);
3751 }
3752 return posn;
3753 }
3754
3755 IV
3756 PerlIOBuf_popped(pTHX_ PerlIO *f)
3757 {
3758 IV code = PerlIOBase_popped(aTHX_ f);
3759 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3760 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3761 Safefree(b->buf);
3762 }
3763 b->buf = NULL;
3764 b->ptr = b->end = b->buf;
3765 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3766 return code;
3767 }
3768
3769 IV
3770 PerlIOBuf_close(pTHX_ PerlIO *f)
3771 {
3772 IV code = PerlIOBase_close(aTHX_ f);
3773 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3774 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3775 Safefree(b->buf);
3776 }
3777 b->buf = NULL;
3778 b->ptr = b->end = b->buf;
3779 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3780 return code;
3781 }
3782
3783 STDCHAR *
3784 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3785 {
3786 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3787 if (!b->buf)
3788 PerlIO_get_base(f);
3789 return b->ptr;
3790 }
3791
3792 SSize_t
3793 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3794 {
3795 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3796 if (!b->buf)
3797 PerlIO_get_base(f);
3798 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3799 return (b->end - b->ptr);
3800 return 0;
3801 }
3802
3803 STDCHAR *
3804 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3805 {
3806 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3807 if (!b->buf) {
3808 if (!b->bufsiz)
3809 b->bufsiz = 4096;
3810 b->buf =
3811 Newz('B',b->buf,b->bufsiz, STDCHAR);
3812 if (!b->buf) {
3813 b->buf = (STDCHAR *) & b->oneword;
3814 b->bufsiz = sizeof(b->oneword);
3815 }
3816 b->ptr = b->buf;
3817 b->end = b->ptr;
3818 }
3819 return b->buf;
3820 }
3821
3822 Size_t
3823 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3824 {
3825 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3826 if (!b->buf)
3827 PerlIO_get_base(f);
3828 return (b->end - b->buf);
3829 }
3830
3831 void
3832 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3833 {
3834 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3835 if (!b->buf)
3836 PerlIO_get_base(f);
3837 b->ptr = ptr;
3838 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3839 assert(PerlIO_get_cnt(f) == cnt);
3840 assert(b->ptr >= b->buf);
3841 }
3842 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3843 }
3844
3845 PerlIO *
3846 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3847 {
3848 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3849 }
3850
3851
3852
3853 PerlIO_funcs PerlIO_perlio = {
3854 sizeof(PerlIO_funcs),
3855 "perlio",
3856 sizeof(PerlIOBuf),
3857 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3858 PerlIOBuf_pushed,
3859 PerlIOBuf_popped,
3860 PerlIOBuf_open,
3861 PerlIOBase_binmode, /* binmode */
3862 NULL,
3863 PerlIOBase_fileno,
3864 PerlIOBuf_dup,
3865 PerlIOBuf_read,
3866 PerlIOBuf_unread,
3867 PerlIOBuf_write,
3868 PerlIOBuf_seek,
3869 PerlIOBuf_tell,
3870 PerlIOBuf_close,
3871 PerlIOBuf_flush,
3872 PerlIOBuf_fill,
3873 PerlIOBase_eof,
3874 PerlIOBase_error,
3875 PerlIOBase_clearerr,
3876 PerlIOBase_setlinebuf,
3877 PerlIOBuf_get_base,
3878 PerlIOBuf_bufsiz,
3879 PerlIOBuf_get_ptr,
3880 PerlIOBuf_get_cnt,
3881 PerlIOBuf_set_ptrcnt,
3882 };
3883
3884 /*--------------------------------------------------------------------------------------*/
3885 /*
3886 * Temp layer to hold unread chars when cannot do it any other way
3887 */
3888
3889 IV
3890 PerlIOPending_fill(pTHX_ PerlIO *f)
3891 {
3892 /*
3893 * Should never happen
3894 */
3895 PerlIO_flush(f);
3896 return 0;
3897 }
3898
3899 IV
3900 PerlIOPending_close(pTHX_ PerlIO *f)
3901 {
3902 /*
3903 * A tad tricky - flush pops us, then we close new top
3904 */
3905 PerlIO_flush(f);
3906 return PerlIO_close(f);
3907 }
3908
3909 IV
3910 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3911 {
3912 /*
3913 * A tad tricky - flush pops us, then we seek new top
3914 */
3915 PerlIO_flush(f);
3916 return PerlIO_seek(f, offset, whence);
3917 }
3918
3919
3920 IV
3921 PerlIOPending_flush(pTHX_ PerlIO *f)
3922 {
3923 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3924 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3925 Safefree(b->buf);
3926 b->buf = NULL;
3927 }
3928 PerlIO_pop(aTHX_ f);
3929 return 0;
3930 }
3931
3932 void
3933 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3934 {
3935 if (cnt <= 0) {
3936 PerlIO_flush(f);
3937 }
3938 else {
3939 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3940 }
3941 }
3942
3943 IV
3944 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3945 {
3946 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3947 PerlIOl *l = PerlIOBase(f);
3948 /*
3949 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3950 * etc. get muddled when it changes mid-string when we auto-pop.
3951 */
3952 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3953 (PerlIOBase(PerlIONext(f))->
3954 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3955 return code;
3956 }
3957
3958 SSize_t
3959 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3960 {
3961 SSize_t avail = PerlIO_get_cnt(f);
3962 SSize_t got = 0;
3963 if ((SSize_t)count < avail)
3964 avail = count;
3965 if (avail > 0)
3966 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3967 if (got >= 0 && got < (SSize_t)count) {
3968 SSize_t more =
3969 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3970 if (more >= 0 || got == 0)
3971 got += more;
3972 }
3973 return got;
3974 }
3975
3976 PerlIO_funcs PerlIO_pending = {
3977 sizeof(PerlIO_funcs),
3978 "pending",
3979 sizeof(PerlIOBuf),
3980 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3981 PerlIOPending_pushed,
3982 PerlIOBuf_popped,
3983 NULL,
3984 PerlIOBase_binmode, /* binmode */
3985 NULL,
3986 PerlIOBase_fileno,
3987 PerlIOBuf_dup,
3988 PerlIOPending_read,
3989 PerlIOBuf_unread,
3990 PerlIOBuf_write,
3991 PerlIOPending_seek,
3992 PerlIOBuf_tell,
3993 PerlIOPending_close,
3994 PerlIOPending_flush,
3995 PerlIOPending_fill,
3996 PerlIOBase_eof,
3997 PerlIOBase_error,
3998 PerlIOBase_clearerr,
3999 PerlIOBase_setlinebuf,
4000 PerlIOBuf_get_base,
4001 PerlIOBuf_bufsiz,
4002 PerlIOBuf_get_ptr,
4003 PerlIOBuf_get_cnt,
4004 PerlIOPending_set_ptrcnt,
4005 };
4006
4007
4008
4009 /*--------------------------------------------------------------------------------------*/
4010 /*
4011 * crlf - translation On read translate CR,LF to "\n" we do this by
4012 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4013 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4014 */
4015
4016 typedef struct {
4017 PerlIOBuf base; /* PerlIOBuf stuff */
4018 STDCHAR *nl; /* Position of crlf we "lied" about in the
4019 * buffer */
4020 } PerlIOCrlf;
4021
4022 IV
4023 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4024 {
4025 IV code;
4026 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4027 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4028 #if 0
4029 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4030 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4031 PerlIOBase(f)->flags);
4032 #endif
4033 {
4034 /* Enable the first CRLF capable layer you can find, but if none
4035 * found, the one we just pushed is fine. This results in at
4036 * any given moment at most one CRLF-capable layer being enabled
4037 * in the whole layer stack. */
4038 PerlIO *g = PerlIONext(f);
4039 while (g && *g) {
4040 PerlIOl *b = PerlIOBase(g);
4041 if (b && b->tab == &PerlIO_crlf) {
4042 if (!(b->flags & PERLIO_F_CRLF))
4043 b->flags |= PERLIO_F_CRLF;
4044 PerlIO_pop(aTHX_ f);
4045 return code;
4046 }
4047 g = PerlIONext(g);
4048 }
4049 }
4050 return code;
4051 }
4052
4053
4054 SSize_t
4055 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4056 {
4057 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4058 if (c->nl) {
4059 *(c->nl) = 0xd;
4060 c->nl = NULL;
4061 }
4062 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4063 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4064 else {
4065 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4066 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4067 SSize_t unread = 0;
4068 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4069 PerlIO_flush(f);
4070 if (!b->buf)
4071 PerlIO_get_base(f);
4072 if (b->buf) {
4073 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4074 b->end = b->ptr = b->buf + b->bufsiz;
4075 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4076 b->posn -= b->bufsiz;
4077 }
4078 while (count > 0 && b->ptr > b->buf) {
4079 int ch = *--buf;
4080 if (ch == '\n') {
4081 if (b->ptr - 2 >= b->buf) {
4082 *--(b->ptr) = 0xa;
4083 *--(b->ptr) = 0xd;
4084 unread++;
4085 count--;
4086 }
4087 else {
4088 buf++;
4089 break;
4090 }
4091 }
4092 else {
4093 *--(b->ptr) = ch;
4094 unread++;
4095 count--;
4096 }
4097 }
4098 }
4099 return unread;
4100 }
4101 }
4102
4103 SSize_t
4104 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4105 {
4106 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4107 if (!b->buf)
4108 PerlIO_get_base(f);
4109 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4110 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4111 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4112 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4113 scan:
4114 while (nl < b->end && *nl != 0xd)
4115 nl++;
4116 if (nl < b->end && *nl == 0xd) {
4117 test:
4118 if (nl + 1 < b->end) {
4119 if (nl[1] == 0xa) {
4120 *nl = '\n';
4121 c->nl = nl;
4122 }
4123 else {
4124 /*
4125 * Not CR,LF but just CR
4126 */
4127 nl++;
4128 goto scan;
4129 }
4130 }
4131 else {
4132 /*
4133 * Blast - found CR as last char in buffer
4134 */
4135
4136 if (b->ptr < nl) {
4137 /*
4138 * They may not care, defer work as long as
4139 * possible
4140 */
4141 c->nl = nl;
4142 return (nl - b->ptr);
4143 }
4144 else {
4145 int code;
4146 b->ptr++; /* say we have read it as far as
4147 * flush() is concerned */
4148 b->buf++; /* Leave space in front of buffer */
4149 /* Note as we have moved buf up flush's
4150 posn += ptr-buf
4151 will naturally make posn point at CR
4152 */
4153 b->bufsiz--; /* Buffer is thus smaller */
4154 code = PerlIO_fill(f); /* Fetch some more */
4155 b->bufsiz++; /* Restore size for next time */
4156 b->buf--; /* Point at space */
4157 b->ptr = nl = b->buf; /* Which is what we hand
4158 * off */
4159 *nl = 0xd; /* Fill in the CR */
4160 if (code == 0)
4161 goto test; /* fill() call worked */
4162 /*
4163 * CR at EOF - just fall through
4164 */
4165 /* Should we clear EOF though ??? */
4166 }
4167 }
4168 }
4169 }
4170 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4171 }
4172 return 0;
4173 }
4174
4175 void
4176 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4177 {
4178 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4179 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4180 if (!b->buf)
4181 PerlIO_get_base(f);
4182 if (!ptr) {
4183 if (c->nl) {
4184 ptr = c->nl + 1;
4185 if (ptr == b->end && *c->nl == 0xd) {
4186 /* Defered CR at end of buffer case - we lied about count */
4187 ptr--;
4188 }
4189 }
4190 else {
4191 ptr = b->end;
4192 }
4193 ptr -= cnt;
4194 }
4195 else {
4196 #if 0
4197 /*
4198 * Test code - delete when it works ...
4199 */
4200 IV flags = PerlIOBase(f)->flags;
4201 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4202 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4203 /* Defered CR at end of buffer case - we lied about count */
4204 chk--;
4205 }
4206 chk -= cnt;
4207
4208 if (ptr != chk ) {
4209 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4210 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4211 b->end, cnt);
4212 }
4213 #endif
4214 }
4215 if (c->nl) {
4216 if (ptr > c->nl) {
4217 /*
4218 * They have taken what we lied about
4219 */
4220 *(c->nl) = 0xd;
4221 c->nl = NULL;
4222 ptr++;
4223 }
4224 }
4225 b->ptr = ptr;
4226 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4227 }
4228
4229 SSize_t
4230 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4231 {
4232 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4233 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4234 else {
4235 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4236 const STDCHAR *buf = (const STDCHAR *) vbuf;
4237 const STDCHAR *ebuf = buf + count;
4238 if (!b->buf)
4239 PerlIO_get_base(f);
4240 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4241 return 0;
4242 while (buf < ebuf) {
4243 STDCHAR *eptr = b->buf + b->bufsiz;
4244 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4245 while (buf < ebuf && b->ptr < eptr) {
4246 if (*buf == '\n') {
4247 if ((b->ptr + 2) > eptr) {
4248 /*
4249 * Not room for both
4250 */
4251 PerlIO_flush(f);
4252 break;
4253 }
4254 else {
4255 *(b->ptr)++ = 0xd; /* CR */
4256 *(b->ptr)++ = 0xa; /* LF */
4257 buf++;
4258 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4259 PerlIO_flush(f);
4260 break;
4261 }
4262 }
4263 }
4264 else {
4265 int ch = *buf++;
4266 *(b->ptr)++ = ch;
4267 }
4268 if (b->ptr >= eptr) {
4269 PerlIO_flush(f);
4270 break;
4271 }
4272 }
4273 }
4274 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4275 PerlIO_flush(f);
4276 return (buf - (STDCHAR *) vbuf);
4277 }
4278 }
4279
4280 IV
4281 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4282 {
4283 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4284 if (c->nl) {
4285 *(c->nl) = 0xd;
4286 c->nl = NULL;
4287 }
4288 return PerlIOBuf_flush(aTHX_ f);
4289 }
4290
4291 IV
4292 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4293 {
4294 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4295 /* In text mode - flush any pending stuff and flip it */
4296 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4297 #ifndef PERLIO_USING_CRLF
4298 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4299 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4300 PerlIO_pop(aTHX_ f);
4301 }
4302 #endif
4303 }
4304 return 0;
4305 }
4306
4307 PerlIO_funcs PerlIO_crlf = {
4308 sizeof(PerlIO_funcs),
4309 "crlf",
4310 sizeof(PerlIOCrlf),
4311 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4312 PerlIOCrlf_pushed,
4313 PerlIOBuf_popped, /* popped */
4314 PerlIOBuf_open,
4315 PerlIOCrlf_binmode, /* binmode */
4316 NULL,
4317 PerlIOBase_fileno,
4318 PerlIOBuf_dup,
4319 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4320 * ... */
4321 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4322 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4323 PerlIOBuf_seek,
4324 PerlIOBuf_tell,
4325 PerlIOBuf_close,
4326 PerlIOCrlf_flush,
4327 PerlIOBuf_fill,
4328 PerlIOBase_eof,
4329 PerlIOBase_error,
4330 PerlIOBase_clearerr,
4331 PerlIOBase_setlinebuf,
4332 PerlIOBuf_get_base,
4333 PerlIOBuf_bufsiz,
4334 PerlIOBuf_get_ptr,
4335 PerlIOCrlf_get_cnt,
4336 PerlIOCrlf_set_ptrcnt,
4337 };
4338
4339 #ifdef HAS_MMAP
4340 /*--------------------------------------------------------------------------------------*/
4341 /*
4342 * mmap as "buffer" layer
4343 */
4344
4345 typedef struct {
4346 PerlIOBuf base; /* PerlIOBuf stuff */
4347 Mmap_t mptr; /* Mapped address */
4348 Size_t len; /* mapped length */
4349 STDCHAR *bbuf; /* malloced buffer if map fails */
4350 } PerlIOMmap;
4351
4352 static size_t page_size = 0;
4353
4354 IV
4355 PerlIOMmap_map(pTHX_ PerlIO *f)
4356 {
4357 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4358 IV flags = PerlIOBase(f)->flags;
4359 IV code = 0;
4360 if (m->len)
4361 abort();
4362 if (flags & PERLIO_F_CANREAD) {
4363 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4364 int fd = PerlIO_fileno(f);
4365 Stat_t st;
4366 code = Fstat(fd, &st);
4367 if (code == 0 && S_ISREG(st.st_mode)) {
4368 SSize_t len = st.st_size - b->posn;
4369 if (len > 0) {
4370 Off_t posn;
4371 if (!page_size) {
4372 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4373 {
4374 SETERRNO(0, SS_NORMAL);
4375 # ifdef _SC_PAGESIZE
4376 page_size = sysconf(_SC_PAGESIZE);
4377 # else
4378 page_size = sysconf(_SC_PAGE_SIZE);
4379 # endif
4380 if ((long) page_size < 0) {
4381 if (errno) {
4382 SV *error = ERRSV;
4383 char *msg;
4384 STRLEN n_a;
4385 (void) SvUPGRADE(error, SVt_PV);
4386 msg = SvPVx(error, n_a);
4387 Perl_croak(aTHX_ "panic: sysconf: %s",
4388 msg);
4389 }
4390 else
4391 Perl_croak(aTHX_
4392 "panic: sysconf: pagesize unknown");
4393 }
4394 }
4395 #else
4396 # ifdef HAS_GETPAGESIZE
4397 page_size = getpagesize();
4398 # else
4399 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4400 page_size = PAGESIZE; /* compiletime, bad */
4401 # endif
4402 # endif
4403 #endif
4404 if ((IV) page_size <= 0)
4405 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4406 (IV) page_size);
4407 }
4408 if (b->posn < 0) {
4409 /*
4410 * This is a hack - should never happen - open should
4411 * have set it !
4412 */
4413 b->posn = PerlIO_tell(PerlIONext(f));
4414 }
4415 posn = (b->posn / page_size) * page_size;
4416 len = st.st_size - posn;
4417 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4418 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4419 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4420 madvise(m->mptr, len, MADV_SEQUENTIAL);
4421 #endif
4422 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4423 madvise(m->mptr, len, MADV_WILLNEED);
4424 #endif
4425 PerlIOBase(f)->flags =
4426 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4427 b->end = ((STDCHAR *) m->mptr) + len;
4428 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4429 b->ptr = b->buf;
4430 m->len = len;
4431 }
4432 else {
4433 b->buf = NULL;
4434 }
4435 }
4436 else {
4437 PerlIOBase(f)->flags =
4438 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4439 b->buf = NULL;
4440 b->ptr = b->end = b->ptr;
4441 code = -1;
4442 }
4443 }
4444 }
4445 return code;
4446 }
4447
4448 IV
4449 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4450 {
4451 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4452 PerlIOBuf *b = &m->base;
4453 IV code = 0;
4454 if (m->len) {
4455 if (b->buf) {
4456 code = munmap(m->mptr, m->len);
4457 b->buf = NULL;
4458 m->len = 0;
4459 m->mptr = NULL;
4460 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4461 code = -1;
4462 }
4463 b->ptr = b->end = b->buf;
4464 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4465 }
4466 return code;
4467 }
4468
4469 STDCHAR *
4470 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4471 {
4472 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4473 PerlIOBuf *b = &m->base;
4474 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4475 /*
4476 * Already have a readbuffer in progress
4477 */
4478 return b->buf;
4479 }
4480 if (b->buf) {
4481 /*
4482 * We have a write buffer or flushed PerlIOBuf read buffer
4483 */
4484 m->bbuf = b->buf; /* save it in case we need it again */
4485 b->buf = NULL; /* Clear to trigger below */
4486 }
4487 if (!b->buf) {
4488 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4489 if (!b->buf) {
4490 /*
4491 * Map did not work - recover PerlIOBuf buffer if we have one
4492 */
4493 b->buf = m->bbuf;
4494 }
4495 }
4496 b->ptr = b->end = b->buf;
4497 if (b->buf)
4498 return b->buf;
4499 return PerlIOBuf_get_base(aTHX_ f);
4500 }
4501
4502 SSize_t
4503 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4504 {
4505 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4506 PerlIOBuf *b = &m->base;
4507 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4508 PerlIO_flush(f);
4509 if (b->ptr && (b->ptr - count) >= b->buf
4510 && memEQ(b->ptr - count, vbuf, count)) {
4511 b->ptr -= count;
4512 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4513 return count;
4514 }
4515 if (m->len) {
4516 /*
4517 * Loose the unwritable mapped buffer
4518 */
4519 PerlIO_flush(f);
4520 /*
4521 * If flush took the "buffer" see if we have one from before
4522 */
4523 if (!b->buf && m->bbuf)
4524 b->buf = m->bbuf;
4525 if (!b->buf) {
4526 PerlIOBuf_get_base(aTHX_ f);
4527 m->bbuf = b->buf;
4528 }
4529 }
4530 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4531 }
4532
4533 SSize_t
4534 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4535 {
4536 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4537 PerlIOBuf *b = &m->base;
4538 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4539 /*
4540 * No, or wrong sort of, buffer
4541 */
4542 if (m->len) {
4543 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4544 return 0;
4545 }
4546 /*
4547 * If unmap took the "buffer" see if we have one from before
4548 */
4549 if (!b->buf && m->bbuf)
4550 b->buf = m->bbuf;
4551 if (!b->buf) {
4552 PerlIOBuf_get_base(aTHX_ f);
4553 m->bbuf = b->buf;
4554 }
4555 }
4556 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4557 }
4558
4559 IV
4560 PerlIOMmap_flush(pTHX_ PerlIO *f)
4561 {
4562 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4563 PerlIOBuf *b = &m->base;
4564 IV code = PerlIOBuf_flush(aTHX_ f);
4565 /*
4566 * Now we are "synced" at PerlIOBuf level
4567 */
4568 if (b->buf) {
4569 if (m->len) {
4570 /*
4571 * Unmap the buffer
4572 */
4573 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4574 code = -1;
4575 }
4576 else {
4577 /*
4578 * We seem to have a PerlIOBuf buffer which was not mapped
4579 * remember it in case we need one later
4580 */
4581 m->bbuf = b->buf;
4582 }
4583 }
4584 return code;
4585 }
4586
4587 IV
4588 PerlIOMmap_fill(pTHX_ PerlIO *f)
4589 {
4590 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4591 IV code = PerlIO_flush(f);
4592 if (code == 0 && !b->buf) {
4593 code = PerlIOMmap_map(aTHX_ f);
4594 }
4595 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4596 code = PerlIOBuf_fill(aTHX_ f);
4597 }
4598 return code;
4599 }
4600
4601 IV
4602 PerlIOMmap_close(pTHX_ PerlIO *f)
4603 {
4604 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4605 PerlIOBuf *b = &m->base;
4606 IV code = PerlIO_flush(f);
4607 if (m->bbuf) {
4608 b->buf = m->bbuf;
4609 m->bbuf = NULL;
4610 b->ptr = b->end = b->buf;
4611 }
4612 if (PerlIOBuf_close(aTHX_ f) != 0)
4613 code = -1;
4614 return code;
4615 }
4616
4617 PerlIO *
4618 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4619 {
4620 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4621 }
4622
4623
4624 PerlIO_funcs PerlIO_mmap = {
4625 sizeof(PerlIO_funcs),
4626 "mmap",
4627 sizeof(PerlIOMmap),
4628 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4629 PerlIOBuf_pushed,
4630 PerlIOBuf_popped,
4631 PerlIOBuf_open,
4632 PerlIOBase_binmode, /* binmode */
4633 NULL,
4634 PerlIOBase_fileno,
4635 PerlIOMmap_dup,
4636 PerlIOBuf_read,
4637 PerlIOMmap_unread,
4638 PerlIOMmap_write,
4639 PerlIOBuf_seek,
4640 PerlIOBuf_tell,
4641 PerlIOBuf_close,
4642 PerlIOMmap_flush,
4643 PerlIOMmap_fill,
4644 PerlIOBase_eof,
4645 PerlIOBase_error,
4646 PerlIOBase_clearerr,
4647 PerlIOBase_setlinebuf,
4648 PerlIOMmap_get_base,
4649 PerlIOBuf_bufsiz,
4650 PerlIOBuf_get_ptr,
4651 PerlIOBuf_get_cnt,
4652 PerlIOBuf_set_ptrcnt,
4653 };
4654
4655 #endif /* HAS_MMAP */
4656
4657 PerlIO *
4658 Perl_PerlIO_stdin(pTHX)
4659 {
4660 if (!PL_perlio) {
4661 PerlIO_stdstreams(aTHX);
4662 }
4663 return &PL_perlio[1];
4664 }
4665
4666 PerlIO *
4667 Perl_PerlIO_stdout(pTHX)
4668 {
4669 if (!PL_perlio) {
4670 PerlIO_stdstreams(aTHX);
4671 }
4672 return &PL_perlio[2];
4673 }
4674
4675 PerlIO *
4676 Perl_PerlIO_stderr(pTHX)
4677 {
4678 if (!PL_perlio) {
4679 PerlIO_stdstreams(aTHX);
4680 }
4681 return &PL_perlio[3];
4682 }
4683
4684 /*--------------------------------------------------------------------------------------*/
4685
4686 char *
4687 PerlIO_getname(PerlIO *f, char *buf)
4688 {
4689 dTHX;
4690 char *name = NULL;
4691 #ifdef VMS
4692 bool exported = FALSE;
4693 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4694 if (!stdio) {
4695 stdio = PerlIO_exportFILE(f,0);
4696 exported = TRUE;
4697 }
4698 if (stdio) {
4699 name = fgetname(stdio, buf);
4700 if (exported) PerlIO_releaseFILE(f,stdio);
4701 }
4702 #else
4703 Perl_croak(aTHX_ "Don't know how to get file name");
4704 #endif
4705 return name;
4706 }
4707
4708
4709 /*--------------------------------------------------------------------------------------*/
4710 /*
4711 * Functions which can be called on any kind of PerlIO implemented in
4712 * terms of above
4713 */
4714
4715 #undef PerlIO_fdopen
4716 PerlIO *
4717 PerlIO_fdopen(int fd, const char *mode)
4718 {
4719 dTHX;
4720 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4721 }
4722
4723 #undef PerlIO_open
4724 PerlIO *
4725 PerlIO_open(const char *path, const char *mode)
4726 {
4727 dTHX;
4728 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4729 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4730 }
4731
4732 #undef Perlio_reopen
4733 PerlIO *
4734 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4735 {
4736 dTHX;
4737 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4738 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4739 }
4740
4741 #undef PerlIO_getc
4742 int
4743 PerlIO_getc(PerlIO *f)
4744 {
4745 dTHX;
4746 STDCHAR buf[1];
4747 SSize_t count = PerlIO_read(f, buf, 1);
4748 if (count == 1) {
4749 return (unsigned char) buf[0];
4750 }
4751 return EOF;
4752 }
4753
4754 #undef PerlIO_ungetc
4755 int
4756 PerlIO_ungetc(PerlIO *f, int ch)
4757 {
4758 dTHX;
4759 if (ch != EOF) {
4760 STDCHAR buf = ch;
4761 if (PerlIO_unread(f, &buf, 1) == 1)
4762 return ch;
4763 }
4764 return EOF;
4765 }
4766
4767 #undef PerlIO_putc
4768 int
4769 PerlIO_putc(PerlIO *f, int ch)
4770 {
4771 dTHX;
4772 STDCHAR buf = ch;
4773 return PerlIO_write(f, &buf, 1);
4774 }
4775
4776 #undef PerlIO_puts
4777 int
4778 PerlIO_puts(PerlIO *f, const char *s)
4779 {
4780 dTHX;
4781 STRLEN len = strlen(s);
4782 return PerlIO_write(f, s, len);
4783 }
4784
4785 #undef PerlIO_rewind
4786 void
4787 PerlIO_rewind(PerlIO *f)
4788 {
4789 dTHX;
4790 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4791 PerlIO_clearerr(f);
4792 }
4793
4794 #undef PerlIO_vprintf
4795 int
4796 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4797 {
4798 dTHX;
4799 SV *sv = newSVpvn("", 0);
4800 char *s;
4801 STRLEN len;
4802 SSize_t wrote;
4803 #ifdef NEED_VA_COPY
4804 va_list apc;
4805 Perl_va_copy(ap, apc);
4806 sv_vcatpvf(sv, fmt, &apc);
4807 #else
4808 sv_vcatpvf(sv, fmt, &ap);
4809 #endif
4810 s = SvPV(sv, len);
4811 wrote = PerlIO_write(f, s, len);
4812 SvREFCNT_dec(sv);
4813 return wrote;
4814 }
4815
4816 #undef PerlIO_printf
4817 int
4818 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4819 {
4820 va_list ap;
4821 int result;
4822 va_start(ap, fmt);
4823 result = PerlIO_vprintf(f, fmt, ap);
4824 va_end(ap);
4825 return result;
4826 }
4827
4828 #undef PerlIO_stdoutf
4829 int
4830 PerlIO_stdoutf(const char *fmt, ...)
4831 {
4832 dTHX;
4833 va_list ap;
4834 int result;
4835 va_start(ap, fmt);
4836 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4837 va_end(ap);
4838 return result;
4839 }
4840
4841 #undef PerlIO_tmpfile
4842 PerlIO *
4843 PerlIO_tmpfile(void)
4844 {
4845 dTHX;
4846 PerlIO *f = NULL;
4847 int fd = -1;
4848 #ifdef WIN32
4849 fd = win32_tmpfd();
4850 if (fd >= 0)
4851 f = PerlIO_fdopen(fd, "w+b");
4852 #else /* WIN32 */
4853 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4854 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4855
4856 /*
4857 * I have no idea how portable mkstemp() is ... NI-S
4858 */
4859 fd = mkstemp(SvPVX(sv));
4860 if (fd >= 0) {
4861 f = PerlIO_fdopen(fd, "w+");
4862 if (f)
4863 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4864 PerlLIO_unlink(SvPVX(sv));
4865 SvREFCNT_dec(sv);
4866 }
4867 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
4868 FILE *stdio = PerlSIO_tmpfile();
4869
4870 if (stdio) {
4871 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
4872 &PerlIO_stdio, "w+", Nullsv))) {
4873 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4874
4875 if (s)
4876 s->stdio = stdio;
4877 }
4878 }
4879 # endif /* else HAS_MKSTEMP */
4880 #endif /* else WIN32 */
4881 return f;
4882 }
4883
4884 #undef HAS_FSETPOS
4885 #undef HAS_FGETPOS
4886
4887 #endif /* USE_SFIO */
4888 #endif /* PERLIO_IS_STDIO */
4889
4890 /*======================================================================================*/
4891 /*
4892 * Now some functions in terms of above which may be needed even if we are
4893 * not in true PerlIO mode
4894 */
4895
4896 #ifndef HAS_FSETPOS
4897 #undef PerlIO_setpos
4898 int
4899 PerlIO_setpos(PerlIO *f, SV *pos)
4900 {
4901 dTHX;
4902 if (SvOK(pos)) {
4903 STRLEN len;
4904 Off_t *posn = (Off_t *) SvPV(pos, len);
4905 if (f && len == sizeof(Off_t))
4906 return PerlIO_seek(f, *posn, SEEK_SET);
4907 }
4908 SETERRNO(EINVAL, SS_IVCHAN);
4909 return -1;
4910 }
4911 #else
4912 #undef PerlIO_setpos
4913 int
4914 PerlIO_setpos(PerlIO *f, SV *pos)
4915 {
4916 dTHX;
4917 if (SvOK(pos)) {
4918 STRLEN len;
4919 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4920 if (f && len == sizeof(Fpos_t)) {
4921 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4922 return fsetpos64(f, fpos);
4923 #else
4924 return fsetpos(f, fpos);
4925 #endif
4926 }
4927 }
4928 SETERRNO(EINVAL, SS_IVCHAN);
4929 return -1;
4930 }
4931 #endif
4932
4933 #ifndef HAS_FGETPOS
4934 #undef PerlIO_getpos
4935 int
4936 PerlIO_getpos(PerlIO *f, SV *pos)
4937 {
4938 dTHX;
4939 Off_t posn = PerlIO_tell(f);
4940 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4941 return (posn == (Off_t) - 1) ? -1 : 0;
4942 }
4943 #else
4944 #undef PerlIO_getpos
4945 int
4946 PerlIO_getpos(PerlIO *f, SV *pos)
4947 {
4948 dTHX;
4949 Fpos_t fpos;
4950 int code;
4951 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4952 code = fgetpos64(f, &fpos);
4953 #else
4954 code = fgetpos(f, &fpos);
4955 #endif
4956 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4957 return code;
4958 }
4959 #endif
4960
4961 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4962
4963 int
4964 vprintf(char *pat, char *args)
4965 {
4966 _doprnt(pat, args, stdout);
4967 return 0; /* wrong, but perl doesn't use the return
4968 * value */
4969 }
4970
4971 int
4972 vfprintf(FILE *fd, char *pat, char *args)
4973 {
4974 _doprnt(pat, args, fd);
4975 return 0; /* wrong, but perl doesn't use the return
4976 * value */
4977 }
4978
4979 #endif
4980
4981 #ifndef PerlIO_vsprintf
4982 int
4983 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4984 {
4985 int val = vsprintf(s, fmt, ap);
4986 if (n >= 0) {
4987 if (strlen(s) >= (STRLEN) n) {
4988 dTHX;
4989 (void) PerlIO_puts(Perl_error_log,
4990 "panic: sprintf overflow - memory corrupted!\n");
4991 my_exit(1);
4992 }
4993 }
4994 return val;
4995 }
4996 #endif
4997
4998 #ifndef PerlIO_sprintf
4999 int
5000 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5001 {
5002 va_list ap;
5003 int result;
5004 va_start(ap, fmt);
5005 result = PerlIO_vsprintf(s, n, fmt, ap);
5006 va_end(ap);
5007 return result;
5008 }
5009 #endif
5010
5011
5012
5013
5014
5015
5016
5017
5018