2 * perlio.c Copyright (c) 1996-2006, 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.
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.
12 /* This file contains the functions needed to implement PerlIO, which
13 * is Perl's private replacement for the C stdio library. This is used
14 * by default unless you compile with -Uuseperlio or run with
15 * PERLIO=:stdio (but don't do this unless you know what you're doing)
19 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
20 * at the dispatch tables, even when we do not need it for other reasons.
21 * Invent a dSYS macro to abstract this out
23 #ifdef PERL_IMPLICIT_SYS
33 # ifndef USE_CROSS_COMPILE
40 #define PERLIO_NOT_STDIO 0
41 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
47 * This file provides those parts of PerlIO abstraction
48 * which are not #defined in perlio.h.
49 * Which these are depends on various Configure #ifdef's
53 #define PERL_IN_PERLIO_C
56 #ifdef PERL_IMPLICIT_CONTEXT
64 /* Missing proto on LynxOS */
68 /* Call the callback or PerlIOBase, and return failure. */
69 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
70 if (PerlIOValid(f)) { \
71 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
72 if (tab && tab->callback) \
73 return (*tab->callback) args; \
75 return PerlIOBase_ ## base args; \
78 SETERRNO(EBADF, SS_IVCHAN); \
81 /* Call the callback or fail, and return failure. */
82 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
83 if (PerlIOValid(f)) { \
84 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
85 if (tab && tab->callback) \
86 return (*tab->callback) args; \
87 SETERRNO(EINVAL, LIB_INVARG); \
90 SETERRNO(EBADF, SS_IVCHAN); \
93 /* Call the callback or PerlIOBase, and be void. */
94 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
95 if (PerlIOValid(f)) { \
96 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
97 if (tab && tab->callback) \
98 (*tab->callback) args; \
100 PerlIOBase_ ## base args; \
103 SETERRNO(EBADF, SS_IVCHAN)
105 /* Call the callback or fail, and be void. */
106 #define Perl_PerlIO_or_fail_void(f, callback, args) \
107 if (PerlIOValid(f)) { \
108 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
109 if (tab && tab->callback) \
110 (*tab->callback) args; \
112 SETERRNO(EINVAL, LIB_INVARG); \
115 SETERRNO(EBADF, SS_IVCHAN)
119 perlsio_binmode(FILE *fp, int iotype, int mode)
122 * This used to be contents of do_binmode in doio.c
125 # if defined(atarist) || defined(__MINT__)
128 ((FILE *) fp)->_flag |= _IOBIN;
130 ((FILE *) fp)->_flag &= ~_IOBIN;
137 if (PerlLIO_setmode(fp, mode) != -1) {
139 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
141 # if defined(WIN32) && defined(__BORLANDC__)
143 * The translation mode of the stream is maintained independent
145 * the translation mode of the fd in the Borland RTL (heavy
146 * digging through their runtime sources reveal). User has to
148 * the mode explicitly for the stream (though they don't
150 * this anywhere). GSAR 97-5-24
156 fp->flags &= ~_F_BIN;
164 # if defined(USEMYBINMODE)
166 if (my_binmode(fp, iotype, mode) != FALSE)
172 PERL_UNUSED_ARG(iotype);
173 PERL_UNUSED_ARG(mode);
181 #define O_ACCMODE 3 /* Assume traditional implementation */
185 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
187 const int result = rawmode & O_ACCMODE;
192 ptype = IoTYPE_RDONLY;
195 ptype = IoTYPE_WRONLY;
203 *writing = (result != O_RDONLY);
205 if (result == O_RDONLY) {
209 else if (rawmode & O_APPEND) {
211 if (result != O_WRONLY)
216 if (result == O_WRONLY)
223 if (rawmode & O_BINARY)
229 #ifndef PERLIO_LAYERS
231 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
233 if (!names || !*names
234 || strEQ(names, ":crlf")
235 || strEQ(names, ":raw")
236 || strEQ(names, ":bytes")
240 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
248 PerlIO_destruct(pTHX)
253 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
256 PERL_UNUSED_ARG(iotype);
257 PERL_UNUSED_ARG(mode);
258 PERL_UNUSED_ARG(names);
261 return perlsio_binmode(fp, iotype, mode);
266 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
268 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
271 #ifdef PERL_IMPLICIT_SYS
272 return PerlSIO_fdupopen(f);
275 return win32_fdupopen(f);
278 const int fd = PerlLIO_dup(PerlIO_fileno(f));
282 const int omode = djgpp_get_stream_mode(f);
284 const int omode = fcntl(fd, F_GETFL);
286 PerlIO_intmode2str(omode,mode,NULL);
287 /* the r+ is a hack */
288 return PerlIO_fdopen(fd, mode);
293 SETERRNO(EBADF, SS_IVCHAN);
303 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
307 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
308 int imode, int perm, PerlIO *old, int narg, SV **args)
312 Perl_croak(aTHX_ "More than one argument to open");
314 if (*args == &PL_sv_undef)
315 return PerlIO_tmpfile();
317 const char *name = SvPV_nolen_const(*args);
318 if (*mode == IoTYPE_NUMERIC) {
319 fd = PerlLIO_open3(name, imode, perm);
321 return PerlIO_fdopen(fd, mode + 1);
324 return PerlIO_reopen(name, mode, old);
327 return PerlIO_open(name, mode);
332 return PerlIO_fdopen(fd, (char *) mode);
337 XS(XS_PerlIO__Layer__find)
341 Perl_croak(aTHX_ "Usage class->find(name[,load])");
343 const char * const name = SvPV_nolen_const(ST(1));
344 ST(0) = (strEQ(name, "crlf")
345 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
352 Perl_boot_core_PerlIO(pTHX)
354 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
360 #ifdef PERLIO_IS_STDIO
367 * Does nothing (yet) except force this file to be included in perl
368 * binary. That allows this file to force inclusion of other functions
369 * that may be required by loadable extensions e.g. for
370 * FileHandle::tmpfile
374 #undef PerlIO_tmpfile
381 #else /* PERLIO_IS_STDIO */
389 * This section is just to make sure these functions get pulled in from
393 #undef PerlIO_tmpfile
405 * Force this file to be included in perl binary. Which allows this
406 * file to force inclusion of other functions that may be required by
407 * loadable extensions e.g. for FileHandle::tmpfile
411 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
412 * results in a lot of lseek()s to regular files and lot of small
415 sfset(sfstdout, SF_SHARE, 0);
418 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
420 PerlIO_importFILE(FILE *stdio, const char *mode)
422 const int fd = fileno(stdio);
423 if (!mode || !*mode) {
426 return PerlIO_fdopen(fd, mode);
430 PerlIO_findFILE(PerlIO *pio)
432 const int fd = PerlIO_fileno(pio);
433 FILE * const f = fdopen(fd, "r+");
435 if (!f && errno == EINVAL)
437 if (!f && errno == EINVAL)
444 /*======================================================================================*/
446 * Implement all the PerlIO interface ourselves.
452 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
459 #include <sys/mman.h>
463 PerlIO_debug(const char *fmt, ...)
468 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
469 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
471 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
473 PL_perlio_debug_fd = -1;
475 if (PL_perlio_debug_fd > 0) {
478 const char * const s = CopFILE(PL_curcop);
479 /* Use fixed buffer as sv_catpvf etc. needs SVs */
481 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
482 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
483 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
485 const char *s = CopFILE(PL_curcop);
487 SV * const sv = newSVpvs("");
488 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
489 (IV) CopLINE(PL_curcop));
490 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
492 s = SvPV_const(sv, len);
493 PerlLIO_write(PL_perlio_debug_fd, s, len);
500 /*--------------------------------------------------------------------------------------*/
503 * Inner level routines
507 * Table of pointers to the PerlIO structs (malloc'ed)
509 #define PERLIO_TABLE_SIZE 64
512 PerlIO_allocate(pTHX)
516 * Find a free slot in the table, allocating new table as necessary
521 while ((f = *last)) {
523 last = (PerlIO **) (f);
524 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
530 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
538 #undef PerlIO_fdupopen
540 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
542 if (PerlIOValid(f)) {
543 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
544 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
546 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
548 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
552 SETERRNO(EBADF, SS_IVCHAN);
558 PerlIO_cleantable(pTHX_ PerlIO **tablep)
560 PerlIO * const table = *tablep;
563 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
564 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
565 PerlIO * const f = table + i;
577 PerlIO_list_alloc(pTHX)
581 Newxz(list, 1, PerlIO_list_t);
587 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
590 if (--list->refcnt == 0) {
593 for (i = 0; i < list->cur; i++) {
594 if (list->array[i].arg)
595 SvREFCNT_dec(list->array[i].arg);
597 Safefree(list->array);
605 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
611 if (list->cur >= list->len) {
614 Renew(list->array, list->len, PerlIO_pair_t);
616 Newx(list->array, list->len, PerlIO_pair_t);
618 p = &(list->array[list->cur++]);
620 if ((p->arg = arg)) {
621 SvREFCNT_inc_simple_void_NN(arg);
626 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
628 PerlIO_list_t *list = NULL;
631 list = PerlIO_list_alloc(aTHX);
632 for (i=0; i < proto->cur; i++) {
634 if (proto->array[i].arg)
635 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
636 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
643 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
646 PerlIO **table = &proto->Iperlio;
649 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
650 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
651 PerlIO_allocate(aTHX); /* root slot is never used */
652 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
653 while ((f = *table)) {
655 table = (PerlIO **) (f++);
656 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
658 (void) fp_dup(f, 0, param);
665 PERL_UNUSED_ARG(proto);
666 PERL_UNUSED_ARG(param);
671 PerlIO_destruct(pTHX)
674 PerlIO **table = &PL_perlio;
677 PerlIO_debug("Destruct %p\n",(void*)aTHX);
679 while ((f = *table)) {
681 table = (PerlIO **) (f++);
682 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
686 if (l->tab->kind & PERLIO_K_DESTRUCT) {
687 PerlIO_debug("Destruct popping %s\n", l->tab->name);
701 PerlIO_pop(pTHX_ PerlIO *f)
703 const PerlIOl *l = *f;
705 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
706 if (l->tab->Popped) {
708 * If popped returns non-zero do not free its layer structure
709 * it has either done so itself, or it is shared and still in
712 if ((*l->tab->Popped) (aTHX_ f) != 0)
720 /* Return as an array the stack of layers on a filehandle. Note that
721 * the stack is returned top-first in the array, and there are three
722 * times as many array elements as there are layers in the stack: the
723 * first element of a layer triplet is the name, the second one is the
724 * arguments, and the third one is the flags. */
727 PerlIO_get_layers(pTHX_ PerlIO *f)
730 AV * const av = newAV();
732 if (PerlIOValid(f)) {
733 PerlIOl *l = PerlIOBase(f);
736 SV * const name = l->tab && l->tab->name ?
737 newSVpv(l->tab->name, 0) : &PL_sv_undef;
738 SV * const arg = l->tab && l->tab->Getarg ?
739 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
742 av_push(av, newSViv((IV)l->flags));
750 /*--------------------------------------------------------------------------------------*/
752 * XS Interface for perl code
756 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
760 if ((SSize_t) len <= 0)
762 for (i = 0; i < PL_known_layers->cur; i++) {
763 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
764 if (memEQ(f->name, name, len) && f->name[len] == 0) {
765 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
769 if (load && PL_subname && PL_def_layerlist
770 && PL_def_layerlist->cur >= 2) {
771 if (PL_in_load_module) {
772 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
775 SV * const pkgsv = newSVpvs("PerlIO");
776 SV * const layer = newSVpvn(name, len);
777 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
779 SAVEINT(PL_in_load_module);
781 SAVEGENERICSV(PL_warnhook);
782 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
786 * The two SVs are magically freed by load_module
788 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
791 return PerlIO_find_layer(aTHX_ name, len, 0);
794 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
798 #ifdef USE_ATTRIBUTES_FOR_PERLIO
801 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
804 IO * const io = GvIOn((GV *) SvRV(sv));
805 PerlIO * const ifp = IoIFP(io);
806 PerlIO * const ofp = IoOFP(io);
807 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
813 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
816 IO * const io = GvIOn((GV *) SvRV(sv));
817 PerlIO * const ifp = IoIFP(io);
818 PerlIO * const ofp = IoOFP(io);
819 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
825 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
827 Perl_warn(aTHX_ "clear %" SVf, sv);
832 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
834 Perl_warn(aTHX_ "free %" SVf, sv);
838 MGVTBL perlio_vtab = {
846 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
849 SV * const sv = SvRV(ST(1));
850 AV * const av = newAV();
854 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
856 mg = mg_find(sv, PERL_MAGIC_ext);
857 mg->mg_virtual = &perlio_vtab;
859 Perl_warn(aTHX_ "attrib %" SVf, sv);
860 for (i = 2; i < items; i++) {
862 const char * const name = SvPV_const(ST(i), len);
863 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
865 av_push(av, SvREFCNT_inc_simple_NN(layer));
876 #endif /* USE_ATTIBUTES_FOR_PERLIO */
879 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
881 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
882 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
886 XS(XS_PerlIO__Layer__NoWarnings)
888 /* This is used as a %SIG{__WARN__} handler to supress warnings
889 during loading of layers.
894 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
898 XS(XS_PerlIO__Layer__find)
903 Perl_croak(aTHX_ "Usage class->find(name[,load])");
906 const char * const name = SvPV_const(ST(1), len);
907 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
908 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
910 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
917 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
920 if (!PL_known_layers)
921 PL_known_layers = PerlIO_list_alloc(aTHX);
922 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
923 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
927 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
931 const char *s = names;
933 while (isSPACE(*s) || *s == ':')
938 const char *as = NULL;
940 if (!isIDFIRST(*s)) {
942 * Message is consistent with how attribute lists are
943 * passed. Even though this means "foo : : bar" is
944 * seen as an invalid separator character.
946 const char q = ((*s == '\'') ? '"' : '\'');
947 if (ckWARN(WARN_LAYER))
948 Perl_warner(aTHX_ packWARN(WARN_LAYER),
949 "Invalid separator character %c%c%c in PerlIO layer specification %s",
951 SETERRNO(EINVAL, LIB_INVARG);
956 } while (isALNUM(*e));
972 * It's a nul terminated string, not allowed
973 * to \ the terminating null. Anything other
974 * character is passed over.
984 if (ckWARN(WARN_LAYER))
985 Perl_warner(aTHX_ packWARN(WARN_LAYER),
986 "Argument list not closed for PerlIO layer \"%.*s\"",
998 PerlIO_funcs * const layer =
999 PerlIO_find_layer(aTHX_ s, llen, 1);
1001 PerlIO_list_push(aTHX_ av, layer,
1007 if (ckWARN(WARN_LAYER))
1008 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1021 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1024 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1025 #ifdef PERLIO_USING_CRLF
1028 if (PerlIO_stdio.Set_ptrcnt)
1029 tab = &PerlIO_stdio;
1031 PerlIO_debug("Pushing %s\n", tab->name);
1032 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1037 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1039 return av->array[n].arg;
1043 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1045 if (n >= 0 && n < av->cur) {
1046 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1047 av->array[n].funcs->name);
1048 return av->array[n].funcs;
1051 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1056 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1058 PERL_UNUSED_ARG(mode);
1059 PERL_UNUSED_ARG(arg);
1060 PERL_UNUSED_ARG(tab);
1061 if (PerlIOValid(f)) {
1063 PerlIO_pop(aTHX_ f);
1069 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1070 sizeof(PerlIO_funcs),
1073 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1093 NULL, /* get_base */
1094 NULL, /* get_bufsiz */
1097 NULL, /* set_ptrcnt */
1101 PerlIO_default_layers(pTHX)
1104 if (!PL_def_layerlist) {
1105 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1106 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1107 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1108 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1110 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1112 osLayer = &PerlIO_win32;
1115 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1116 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1117 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1118 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1120 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1122 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1124 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1125 PerlIO_list_push(aTHX_ PL_def_layerlist,
1126 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1129 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1132 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1135 if (PL_def_layerlist->cur < 2) {
1136 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1138 return PL_def_layerlist;
1142 Perl_boot_core_PerlIO(pTHX)
1144 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1145 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1148 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1149 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1153 PerlIO_default_layer(pTHX_ I32 n)
1156 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1159 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1162 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1163 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1166 PerlIO_stdstreams(pTHX)
1170 PerlIO_allocate(aTHX);
1171 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1172 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1173 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1178 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1180 if (tab->fsize != sizeof(PerlIO_funcs)) {
1182 Perl_croak(aTHX_ "Layer does not match this perl");
1186 if (tab->size < sizeof(PerlIOl)) {
1189 /* Real layer with a data area */
1192 Newxz(temp, tab->size, char);
1196 l->tab = (PerlIO_funcs*) tab;
1198 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1199 (void*)f, tab->name,
1200 (mode) ? mode : "(Null)", (void*)arg);
1201 if (*l->tab->Pushed &&
1203 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1204 PerlIO_pop(aTHX_ f);
1213 /* Pseudo-layer where push does its own stack adjust */
1214 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1215 (mode) ? mode : "(Null)", (void*)arg);
1217 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1225 PerlIOBase_binmode(pTHX_ PerlIO *f)
1227 if (PerlIOValid(f)) {
1228 /* Is layer suitable for raw stream ? */
1229 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1230 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1231 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1234 /* Not suitable - pop it */
1235 PerlIO_pop(aTHX_ f);
1243 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1245 PERL_UNUSED_ARG(mode);
1246 PERL_UNUSED_ARG(arg);
1247 PERL_UNUSED_ARG(tab);
1249 if (PerlIOValid(f)) {
1254 * Strip all layers that are not suitable for a raw stream
1257 while (t && (l = *t)) {
1258 if (l->tab->Binmode) {
1259 /* Has a handler - normal case */
1260 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1262 /* Layer still there - move down a layer */
1271 /* No handler - pop it */
1272 PerlIO_pop(aTHX_ t);
1275 if (PerlIOValid(f)) {
1276 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1284 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1285 PerlIO_list_t *layers, IV n, IV max)
1289 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1291 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1302 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1306 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1307 code = PerlIO_parse_layers(aTHX_ layers, names);
1309 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1311 PerlIO_list_free(aTHX_ layers);
1317 /*--------------------------------------------------------------------------------------*/
1319 * Given the abstraction above the public API functions
1323 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1325 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1326 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1327 iotype, mode, (names) ? names : "(Null)");
1330 /* Do not flush etc. if (e.g.) switching encodings.
1331 if a pushed layer knows it needs to flush lower layers
1332 (for example :unix which is never going to call them)
1333 it can do the flush when it is pushed.
1335 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1338 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1339 #ifdef PERLIO_USING_CRLF
1340 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1341 O_BINARY so we can look for it in mode.
1343 if (!(mode & O_BINARY)) {
1345 /* FIXME?: Looking down the layer stack seems wrong,
1346 but is a way of reaching past (say) an encoding layer
1347 to flip CRLF-ness of the layer(s) below
1350 /* Perhaps we should turn on bottom-most aware layer
1351 e.g. Ilya's idea that UNIX TTY could serve
1353 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1354 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1355 /* Not in text mode - flush any pending stuff and flip it */
1357 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1359 /* Only need to turn it on in one layer so we are done */
1364 /* Not finding a CRLF aware layer presumably means we are binary
1365 which is not what was requested - so we failed
1366 We _could_ push :crlf layer but so could caller
1371 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1372 So code that used to be here is now in PerlIORaw_pushed().
1374 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1379 PerlIO__close(pTHX_ PerlIO *f)
1381 if (PerlIOValid(f)) {
1382 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1383 if (tab && tab->Close)
1384 return (*tab->Close)(aTHX_ f);
1386 return PerlIOBase_close(aTHX_ f);
1389 SETERRNO(EBADF, SS_IVCHAN);
1395 Perl_PerlIO_close(pTHX_ PerlIO *f)
1397 const int code = PerlIO__close(aTHX_ f);
1398 while (PerlIOValid(f)) {
1399 PerlIO_pop(aTHX_ f);
1405 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1408 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1412 Perl_PerlIO_context_layers(pTHX_ const char *mode)
1415 const char *type = NULL;
1417 * Need to supply default layer info from open.pm
1419 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
1421 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
1426 type = SvPV_const(layers, len);
1427 if (type && mode && mode[0] != 'r') {
1429 * Skip to write part, which is separated by a '\0'
1431 STRLEN read_len = strlen(type);
1432 if (read_len < len) {
1433 type += read_len + 1;
1441 static PerlIO_funcs *
1442 PerlIO_layer_from_ref(pTHX_ SV *sv)
1446 * For any scalar type load the handler which is bundled with perl
1448 if (SvTYPE(sv) < SVt_PVAV)
1449 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1452 * For other types allow if layer is known but don't try and load it
1454 switch (SvTYPE(sv)) {
1456 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1458 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1460 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1462 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1468 PerlIO_resolve_layers(pTHX_ const char *layers,
1469 const char *mode, int narg, SV **args)
1472 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1475 PerlIO_stdstreams(aTHX);
1477 SV * const arg = *args;
1479 * If it is a reference but not an object see if we have a handler
1482 if (SvROK(arg) && !sv_isobject(arg)) {
1483 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1485 def = PerlIO_list_alloc(aTHX);
1486 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1490 * Don't fail if handler cannot be found :via(...) etc. may do
1491 * something sensible else we will just stringfy and open
1496 if (!layers || !*layers)
1497 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1498 if (layers && *layers) {
1502 av = PerlIO_list_alloc(aTHX);
1503 for (i = 0; i < def->cur; i++) {
1504 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1511 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1515 PerlIO_list_free(aTHX_ av);
1527 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1528 int imode, int perm, PerlIO *f, int narg, SV **args)
1531 if (!f && narg == 1 && *args == &PL_sv_undef) {
1532 if ((f = PerlIO_tmpfile())) {
1533 if (!layers || !*layers)
1534 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1535 if (layers && *layers)
1536 PerlIO_apply_layers(aTHX_ f, mode, layers);
1540 PerlIO_list_t *layera;
1542 PerlIO_funcs *tab = NULL;
1543 if (PerlIOValid(f)) {
1545 * This is "reopen" - it is not tested as perl does not use it
1549 layera = PerlIO_list_alloc(aTHX);
1551 SV * const arg = (l->tab->Getarg)
1552 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1554 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1555 l = *PerlIONext(&l);
1559 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1565 * Start at "top" of layer stack
1567 n = layera->cur - 1;
1569 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1578 * Found that layer 'n' can do opens - call it
1580 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1581 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1583 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1584 tab->name, layers ? layers : "(Null)", mode, fd,
1585 imode, perm, (void*)f, narg, (void*)args);
1587 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1590 SETERRNO(EINVAL, LIB_INVARG);
1594 if (n + 1 < layera->cur) {
1596 * More layers above the one that we used to open -
1599 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1600 /* If pushing layers fails close the file */
1607 PerlIO_list_free(aTHX_ layera);
1614 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1616 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1620 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1622 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1626 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1628 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1632 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1634 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1638 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1640 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1644 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1649 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1651 if (tab && tab->Flush)
1652 return (*tab->Flush) (aTHX_ f);
1654 return 0; /* If no Flush defined, silently succeed. */
1657 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1658 SETERRNO(EBADF, SS_IVCHAN);
1664 * Is it good API design to do flush-all on NULL, a potentially
1665 * errorneous input? Maybe some magical value (PerlIO*
1666 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1667 * things on fflush(NULL), but should we be bound by their design
1670 PerlIO **table = &PL_perlio;
1672 while ((f = *table)) {
1674 table = (PerlIO **) (f++);
1675 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1676 if (*f && PerlIO_flush(f) != 0)
1686 PerlIOBase_flush_linebuf(pTHX)
1689 PerlIO **table = &PL_perlio;
1691 while ((f = *table)) {
1693 table = (PerlIO **) (f++);
1694 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1697 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1698 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1706 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1712 PerlIO_isutf8(PerlIO *f)
1715 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1717 SETERRNO(EBADF, SS_IVCHAN);
1723 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1725 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1729 Perl_PerlIO_error(pTHX_ PerlIO *f)
1731 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1735 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1737 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1741 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1743 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1747 PerlIO_has_base(PerlIO *f)
1749 if (PerlIOValid(f)) {
1750 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1753 return (tab->Get_base != NULL);
1754 SETERRNO(EINVAL, LIB_INVARG);
1757 SETERRNO(EBADF, SS_IVCHAN);
1763 PerlIO_fast_gets(PerlIO *f)
1765 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1766 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1769 return (tab->Set_ptrcnt != NULL);
1770 SETERRNO(EINVAL, LIB_INVARG);
1773 SETERRNO(EBADF, SS_IVCHAN);
1779 PerlIO_has_cntptr(PerlIO *f)
1781 if (PerlIOValid(f)) {
1782 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1785 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1786 SETERRNO(EINVAL, LIB_INVARG);
1789 SETERRNO(EBADF, SS_IVCHAN);
1795 PerlIO_canset_cnt(PerlIO *f)
1797 if (PerlIOValid(f)) {
1798 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1801 return (tab->Set_ptrcnt != NULL);
1802 SETERRNO(EINVAL, LIB_INVARG);
1805 SETERRNO(EBADF, SS_IVCHAN);
1811 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1813 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1817 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1819 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1823 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1825 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1829 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1831 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1835 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1837 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1841 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1843 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1847 /*--------------------------------------------------------------------------------------*/
1849 * utf8 and raw dummy layers
1853 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1855 PERL_UNUSED_CONTEXT;
1856 PERL_UNUSED_ARG(mode);
1857 PERL_UNUSED_ARG(arg);
1858 if (PerlIOValid(f)) {
1859 if (tab->kind & PERLIO_K_UTF8)
1860 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1862 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1868 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1869 sizeof(PerlIO_funcs),
1872 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1892 NULL, /* get_base */
1893 NULL, /* get_bufsiz */
1896 NULL, /* set_ptrcnt */
1899 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1900 sizeof(PerlIO_funcs),
1923 NULL, /* get_base */
1924 NULL, /* get_bufsiz */
1927 NULL, /* set_ptrcnt */
1931 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1932 IV n, const char *mode, int fd, int imode, int perm,
1933 PerlIO *old, int narg, SV **args)
1935 PerlIO_funcs * const tab = PerlIO_default_btm();
1936 PERL_UNUSED_ARG(self);
1937 if (tab && tab->Open)
1938 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1940 SETERRNO(EINVAL, LIB_INVARG);
1944 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1945 sizeof(PerlIO_funcs),
1968 NULL, /* get_base */
1969 NULL, /* get_bufsiz */
1972 NULL, /* set_ptrcnt */
1974 /*--------------------------------------------------------------------------------------*/
1975 /*--------------------------------------------------------------------------------------*/
1977 * "Methods" of the "base class"
1981 PerlIOBase_fileno(pTHX_ PerlIO *f)
1983 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1987 PerlIO_modestr(PerlIO * f, char *buf)
1990 if (PerlIOValid(f)) {
1991 const IV flags = PerlIOBase(f)->flags;
1992 if (flags & PERLIO_F_APPEND) {
1994 if (flags & PERLIO_F_CANREAD) {
1998 else if (flags & PERLIO_F_CANREAD) {
2000 if (flags & PERLIO_F_CANWRITE)
2003 else if (flags & PERLIO_F_CANWRITE) {
2005 if (flags & PERLIO_F_CANREAD) {
2009 #ifdef PERLIO_USING_CRLF
2010 if (!(flags & PERLIO_F_CRLF))
2020 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2022 PerlIOl * const l = PerlIOBase(f);
2023 PERL_UNUSED_CONTEXT;
2024 PERL_UNUSED_ARG(arg);
2026 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2027 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2028 if (tab->Set_ptrcnt != NULL)
2029 l->flags |= PERLIO_F_FASTGETS;
2031 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2035 l->flags |= PERLIO_F_CANREAD;
2038 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2041 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2044 SETERRNO(EINVAL, LIB_INVARG);
2050 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2053 l->flags &= ~PERLIO_F_CRLF;
2056 l->flags |= PERLIO_F_CRLF;
2059 SETERRNO(EINVAL, LIB_INVARG);
2066 l->flags |= l->next->flags &
2067 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2072 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2073 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2074 l->flags, PerlIO_modestr(f, temp));
2080 PerlIOBase_popped(pTHX_ PerlIO *f)
2082 PERL_UNUSED_CONTEXT;
2088 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2091 * Save the position as current head considers it
2093 const Off_t old = PerlIO_tell(f);
2094 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2095 PerlIOSelf(f, PerlIOBuf)->posn = old;
2096 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2100 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2102 STDCHAR *buf = (STDCHAR *) vbuf;
2104 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2105 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2106 SETERRNO(EBADF, SS_IVCHAN);
2112 SSize_t avail = PerlIO_get_cnt(f);
2115 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2117 STDCHAR *ptr = PerlIO_get_ptr(f);
2118 Copy(ptr, buf, take, STDCHAR);
2119 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2122 if (avail == 0) /* set_ptrcnt could have reset avail */
2125 if (count > 0 && avail <= 0) {
2126 if (PerlIO_fill(f) != 0)
2131 return (buf - (STDCHAR *) vbuf);
2137 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2139 PERL_UNUSED_CONTEXT;
2145 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2147 PERL_UNUSED_CONTEXT;
2153 PerlIOBase_close(pTHX_ PerlIO *f)
2156 if (PerlIOValid(f)) {
2157 PerlIO *n = PerlIONext(f);
2158 code = PerlIO_flush(f);
2159 PerlIOBase(f)->flags &=
2160 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2161 while (PerlIOValid(n)) {
2162 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2163 if (tab && tab->Close) {
2164 if ((*tab->Close)(aTHX_ n) != 0)
2169 PerlIOBase(n)->flags &=
2170 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2176 SETERRNO(EBADF, SS_IVCHAN);
2182 PerlIOBase_eof(pTHX_ PerlIO *f)
2184 PERL_UNUSED_CONTEXT;
2185 if (PerlIOValid(f)) {
2186 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2192 PerlIOBase_error(pTHX_ PerlIO *f)
2194 PERL_UNUSED_CONTEXT;
2195 if (PerlIOValid(f)) {
2196 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2202 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2204 if (PerlIOValid(f)) {
2205 PerlIO * const n = PerlIONext(f);
2206 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2213 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2215 PERL_UNUSED_CONTEXT;
2216 if (PerlIOValid(f)) {
2217 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2222 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2228 return sv_dup(arg, param);
2231 return newSVsv(arg);
2234 PERL_UNUSED_ARG(param);
2235 return newSVsv(arg);
2240 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2242 PerlIO * const nexto = PerlIONext(o);
2243 if (PerlIOValid(nexto)) {
2244 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2245 if (tab && tab->Dup)
2246 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2248 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2251 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2254 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2255 self->name, (void*)f, (void*)o, (void*)param);
2257 arg = (*self->Getarg)(aTHX_ o, param, flags);
2261 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2270 perl_mutex PerlIO_mutex;
2273 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2275 /* Must be called with PerlIO_mutex locked. */
2277 S_more_refcounted_fds(pTHX_ const int new_fd) {
2279 const int old_max = PL_perlio_fd_refcnt_size;
2280 const int new_max = 16 + (new_fd & ~15);
2283 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2284 old_max, new_fd, new_max);
2286 if (new_fd < old_max) {
2290 assert (new_max > new_fd);
2293 = PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2297 MUTEX_UNLOCK(&PerlIO_mutex);
2299 /* Can't use PerlIO to write as it allocates memory */
2300 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2301 PL_no_mem, strlen(PL_no_mem));
2305 PL_perlio_fd_refcnt_size = new_max;
2306 PL_perlio_fd_refcnt = new_array;
2308 PerlIO_debug("Zeroing %p, %d\n",
2309 (void*)(new_array + old_max),
2312 Zero(new_array + old_max, new_max - old_max, int);
2319 /* Place holder for stdstreams call ??? */
2321 MUTEX_INIT(&PerlIO_mutex);
2323 PERL_UNUSED_CONTEXT;
2328 PerlIOUnix_refcnt_inc(int fd)
2335 MUTEX_LOCK(&PerlIO_mutex);
2337 if (fd >= PL_perlio_fd_refcnt_size)
2338 S_more_refcounted_fds(aTHX_ fd);
2340 PL_perlio_fd_refcnt[fd]++;
2341 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2344 MUTEX_UNLOCK(&PerlIO_mutex);
2350 PerlIOUnix_refcnt_dec(int fd)
2357 MUTEX_LOCK(&PerlIO_mutex);
2359 /* XXX should this be a panic? */
2360 if (fd >= PL_perlio_fd_refcnt_size)
2361 S_more_refcounted_fds(aTHX_ fd);
2363 /* XXX should this be a panic if it drops below 0? */
2364 cnt = --PL_perlio_fd_refcnt[fd];
2365 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2367 MUTEX_UNLOCK(&PerlIO_mutex);
2374 PerlIO_cleanup(pTHX)
2379 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2381 PerlIO_debug("Cleanup layers\n");
2383 /* Raise STDIN..STDERR refcount so we don't close them */
2384 for (i=0; i < 3; i++)
2385 PerlIOUnix_refcnt_inc(i);
2386 PerlIO_cleantable(aTHX_ &PL_perlio);
2387 /* Restore STDIN..STDERR refcount */
2388 for (i=0; i < 3; i++)
2389 PerlIOUnix_refcnt_dec(i);
2391 if (PL_known_layers) {
2392 PerlIO_list_free(aTHX_ PL_known_layers);
2393 PL_known_layers = NULL;
2395 if (PL_def_layerlist) {
2396 PerlIO_list_free(aTHX_ PL_def_layerlist);
2397 PL_def_layerlist = NULL;
2403 /*--------------------------------------------------------------------------------------*/
2405 * Bottom-most level for UNIX-like case
2409 struct _PerlIO base; /* The generic part */
2410 int fd; /* UNIX like file descriptor */
2411 int oflags; /* open/fcntl flags */
2415 PerlIOUnix_oflags(const char *mode)
2418 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2423 if (*++mode == '+') {
2430 oflags = O_CREAT | O_TRUNC;
2431 if (*++mode == '+') {
2440 oflags = O_CREAT | O_APPEND;
2441 if (*++mode == '+') {
2454 else if (*mode == 't') {
2456 oflags &= ~O_BINARY;
2460 * Always open in binary mode
2463 if (*mode || oflags == -1) {
2464 SETERRNO(EINVAL, LIB_INVARG);
2471 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2473 PERL_UNUSED_CONTEXT;
2474 return PerlIOSelf(f, PerlIOUnix)->fd;
2478 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2480 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2483 if (PerlLIO_fstat(fd, &st) == 0) {
2484 if (!S_ISREG(st.st_mode)) {
2485 PerlIO_debug("%d is not regular file\n",fd);
2486 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2489 PerlIO_debug("%d _is_ a regular file\n",fd);
2495 PerlIOUnix_refcnt_inc(fd);
2496 PERL_UNUSED_CONTEXT;
2500 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2502 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2503 if (*PerlIONext(f)) {
2504 /* We never call down so do any pending stuff now */
2505 PerlIO_flush(PerlIONext(f));
2507 * XXX could (or should) we retrieve the oflags from the open file
2508 * handle rather than believing the "mode" we are passed in? XXX
2509 * Should the value on NULL mode be 0 or -1?
2511 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2512 mode ? PerlIOUnix_oflags(mode) : -1);
2514 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2520 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2522 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2524 PERL_UNUSED_CONTEXT;
2525 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2527 SETERRNO(ESPIPE, LIB_INVARG);
2529 SETERRNO(EINVAL, LIB_INVARG);
2533 new_loc = PerlLIO_lseek(fd, offset, whence);
2534 if (new_loc == (Off_t) - 1)
2536 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2541 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2542 IV n, const char *mode, int fd, int imode,
2543 int perm, PerlIO *f, int narg, SV **args)
2545 if (PerlIOValid(f)) {
2546 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2547 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2550 if (*mode == IoTYPE_NUMERIC)
2553 imode = PerlIOUnix_oflags(mode);
2557 const char *path = SvPV_nolen_const(*args);
2558 fd = PerlLIO_open3(path, imode, perm);
2562 if (*mode == IoTYPE_IMPLICIT)
2565 f = PerlIO_allocate(aTHX);
2567 if (!PerlIOValid(f)) {
2568 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2572 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2573 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2574 if (*mode == IoTYPE_APPEND)
2575 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2582 * FIXME: pop layers ???
2590 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2592 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2594 if (flags & PERLIO_DUP_FD) {
2595 fd = PerlLIO_dup(fd);
2598 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2600 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2601 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2610 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2613 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2614 #ifdef PERLIO_STD_SPECIAL
2616 return PERLIO_STD_IN(fd, vbuf, count);
2618 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2619 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2623 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2624 if (len >= 0 || errno != EINTR) {
2626 if (errno != EAGAIN) {
2627 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2630 else if (len == 0 && count != 0) {
2631 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2642 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2645 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2646 #ifdef PERLIO_STD_SPECIAL
2647 if (fd == 1 || fd == 2)
2648 return PERLIO_STD_OUT(fd, vbuf, count);
2651 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2652 if (len >= 0 || errno != EINTR) {
2654 if (errno != EAGAIN) {
2655 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2666 PerlIOUnix_tell(pTHX_ PerlIO *f)
2668 PERL_UNUSED_CONTEXT;
2670 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2675 PerlIOUnix_close(pTHX_ PerlIO *f)
2678 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2680 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2681 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2682 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2687 SETERRNO(EBADF,SS_IVCHAN);
2690 while (PerlLIO_close(fd) != 0) {
2691 if (errno != EINTR) {
2698 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2703 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2704 sizeof(PerlIO_funcs),
2711 PerlIOBase_binmode, /* binmode */
2721 PerlIOBase_noop_ok, /* flush */
2722 PerlIOBase_noop_fail, /* fill */
2725 PerlIOBase_clearerr,
2726 PerlIOBase_setlinebuf,
2727 NULL, /* get_base */
2728 NULL, /* get_bufsiz */
2731 NULL, /* set_ptrcnt */
2734 /*--------------------------------------------------------------------------------------*/
2739 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2740 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2741 broken by the last second glibc 2.3 fix
2743 #define STDIO_BUFFER_WRITABLE
2748 struct _PerlIO base;
2749 FILE *stdio; /* The stream */
2753 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2755 PERL_UNUSED_CONTEXT;
2757 if (PerlIOValid(f)) {
2758 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2760 return PerlSIO_fileno(s);
2767 PerlIOStdio_mode(const char *mode, char *tmode)
2769 char * const ret = tmode;
2775 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2783 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2786 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2787 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2788 if (toptab == tab) {
2789 /* Top is already stdio - pop self (duplicate) and use original */
2790 PerlIO_pop(aTHX_ f);
2793 const int fd = PerlIO_fileno(n);
2796 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2797 mode = PerlIOStdio_mode(mode, tmode)))) {
2798 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2799 /* We never call down so do any pending stuff now */
2800 PerlIO_flush(PerlIONext(f));
2807 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2812 PerlIO_importFILE(FILE *stdio, const char *mode)
2818 if (!mode || !*mode) {
2819 /* We need to probe to see how we can open the stream
2820 so start with read/write and then try write and read
2821 we dup() so that we can fclose without loosing the fd.
2823 Note that the errno value set by a failing fdopen
2824 varies between stdio implementations.
2826 const int fd = PerlLIO_dup(fileno(stdio));
2827 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2829 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2832 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2835 /* Don't seem to be able to open */
2841 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2842 s = PerlIOSelf(f, PerlIOStdio);
2850 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2851 IV n, const char *mode, int fd, int imode,
2852 int perm, PerlIO *f, int narg, SV **args)
2855 if (PerlIOValid(f)) {
2856 const char * const path = SvPV_nolen_const(*args);
2857 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2859 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2860 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2865 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2870 const char * const path = SvPV_nolen_const(*args);
2871 if (*mode == IoTYPE_NUMERIC) {
2873 fd = PerlLIO_open3(path, imode, perm);
2877 bool appended = FALSE;
2879 /* Cygwin wants its 'b' early. */
2881 mode = PerlIOStdio_mode(mode, tmode);
2883 stdio = PerlSIO_fopen(path, mode);
2886 f = PerlIO_allocate(aTHX);
2889 mode = PerlIOStdio_mode(mode, tmode);
2890 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2892 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2893 PerlIOUnix_refcnt_inc(fileno(stdio));
2895 PerlSIO_fclose(stdio);
2907 if (*mode == IoTYPE_IMPLICIT) {
2914 stdio = PerlSIO_stdin;
2917 stdio = PerlSIO_stdout;
2920 stdio = PerlSIO_stderr;
2925 stdio = PerlSIO_fdopen(fd, mode =
2926 PerlIOStdio_mode(mode, tmode));
2930 f = PerlIO_allocate(aTHX);
2932 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2933 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2934 PerlIOUnix_refcnt_inc(fileno(stdio));
2944 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2946 /* This assumes no layers underneath - which is what
2947 happens, but is not how I remember it. NI-S 2001/10/16
2949 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2950 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2951 const int fd = fileno(stdio);
2953 if (flags & PERLIO_DUP_FD) {
2954 const int dfd = PerlLIO_dup(fileno(stdio));
2956 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2961 /* FIXME: To avoid messy error recovery if dup fails
2962 re-use the existing stdio as though flag was not set
2966 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2968 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2969 PerlIOUnix_refcnt_inc(fileno(stdio));
2975 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2977 PERL_UNUSED_CONTEXT;
2979 /* XXX this could use PerlIO_canset_fileno() and
2980 * PerlIO_set_fileno() support from Configure
2982 # if defined(__UCLIBC__)
2983 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2986 # elif defined(__GLIBC__)
2987 /* There may be a better way for GLIBC:
2988 - libio.h defines a flag to not close() on cleanup
2992 # elif defined(__sun__)
2994 # elif defined(__hpux)
2998 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2999 your platform does not have special entry try this one.
3000 [For OSF only have confirmation for Tru64 (alpha)
3001 but assume other OSFs will be similar.]
3003 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3006 # elif defined(__FreeBSD__)
3007 /* There may be a better way on FreeBSD:
3008 - we could insert a dummy func in the _close function entry
3009 f->_close = (int (*)(void *)) dummy_close;
3013 # elif defined(__OpenBSD__)
3014 /* There may be a better way on OpenBSD:
3015 - we could insert a dummy func in the _close function entry
3016 f->_close = (int (*)(void *)) dummy_close;
3020 # elif defined(__EMX__)
3021 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3024 # elif defined(__CYGWIN__)
3025 /* There may be a better way on CYGWIN:
3026 - we could insert a dummy func in the _close function entry
3027 f->_close = (int (*)(void *)) dummy_close;
3031 # elif defined(WIN32)
3032 # if defined(__BORLANDC__)
3033 f->fd = PerlLIO_dup(fileno(f));
3034 # elif defined(UNDER_CE)
3035 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3044 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3045 (which isn't thread safe) instead
3047 # error "Don't know how to set FILE.fileno on your platform"
3055 PerlIOStdio_close(pTHX_ PerlIO *f)
3057 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3063 const int fd = fileno(stdio);
3068 #ifdef SOCKS5_VERSION_NAME
3069 /* Socks lib overrides close() but stdio isn't linked to
3070 that library (though we are) - so we must call close()
3071 on sockets on stdio's behalf.
3074 Sock_size_t optlen = sizeof(int);
3075 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3078 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3081 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3082 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3084 if (stdio == stdout || stdio == stderr)
3085 return PerlIO_flush(f);
3086 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3087 Use Sarathy's trick from maint-5.6 to invalidate the
3088 fileno slot of the FILE *
3090 result = PerlIO_flush(f);
3092 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3094 dupfd = PerlLIO_dup(fd);
3096 result = PerlSIO_fclose(stdio);
3097 /* We treat error from stdio as success if we invalidated
3098 errno may NOT be expected EBADF
3100 if (invalidate && result != 0) {
3104 #ifdef SOCKS5_VERSION_NAME
3105 /* in SOCKS' case, let close() determine return value */
3109 PerlLIO_dup2(dupfd,fd);
3110 PerlLIO_close(dupfd);
3117 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3120 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3124 STDCHAR *buf = (STDCHAR *) vbuf;
3126 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3127 * stdio does not do that for fread()
3129 const int ch = PerlSIO_fgetc(s);
3136 got = PerlSIO_fread(vbuf, 1, count, s);
3137 if (got == 0 && PerlSIO_ferror(s))
3139 if (got >= 0 || errno != EINTR)
3142 SETERRNO(0,0); /* just in case */
3148 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3151 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3153 #ifdef STDIO_BUFFER_WRITABLE
3154 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3155 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3156 STDCHAR *base = PerlIO_get_base(f);
3157 SSize_t cnt = PerlIO_get_cnt(f);
3158 STDCHAR *ptr = PerlIO_get_ptr(f);
3159 SSize_t avail = ptr - base;
3161 if (avail > count) {
3165 Move(buf-avail,ptr,avail,STDCHAR);
3168 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3169 if (PerlSIO_feof(s) && unread >= 0)
3170 PerlSIO_clearerr(s);
3175 if (PerlIO_has_cntptr(f)) {
3176 /* We can get pointer to buffer but not its base
3177 Do ungetc() but check chars are ending up in the
3180 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3181 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3183 const int ch = *--buf & 0xFF;
3184 if (ungetc(ch,s) != ch) {
3185 /* ungetc did not work */
3188 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3189 /* Did not change pointer as expected */
3190 fgetc(s); /* get char back again */
3200 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3206 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3211 got = PerlSIO_fwrite(vbuf, 1, count,
3212 PerlIOSelf(f, PerlIOStdio)->stdio);
3213 if (got >= 0 || errno != EINTR)
3216 SETERRNO(0,0); /* just in case */
3222 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3224 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3225 PERL_UNUSED_CONTEXT;
3227 return PerlSIO_fseek(stdio, offset, whence);
3231 PerlIOStdio_tell(pTHX_ PerlIO *f)
3233 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3234 PERL_UNUSED_CONTEXT;
3236 return PerlSIO_ftell(stdio);
3240 PerlIOStdio_flush(pTHX_ PerlIO *f)
3242 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3243 PERL_UNUSED_CONTEXT;
3245 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3246 return PerlSIO_fflush(stdio);
3252 * FIXME: This discards ungetc() and pre-read stuff which is not
3253 * right if this is just a "sync" from a layer above Suspect right
3254 * design is to do _this_ but not have layer above flush this
3255 * layer read-to-read
3258 * Not writeable - sync by attempting a seek
3260 const int err = errno;
3261 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3269 PerlIOStdio_eof(pTHX_ PerlIO *f)
3271 PERL_UNUSED_CONTEXT;
3273 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3277 PerlIOStdio_error(pTHX_ PerlIO *f)
3279 PERL_UNUSED_CONTEXT;
3281 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3285 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3287 PERL_UNUSED_CONTEXT;
3289 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3293 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3295 PERL_UNUSED_CONTEXT;
3297 #ifdef HAS_SETLINEBUF
3298 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3300 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3306 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3308 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3309 return (STDCHAR*)PerlSIO_get_base(stdio);
3313 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3315 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3316 return PerlSIO_get_bufsiz(stdio);
3320 #ifdef USE_STDIO_PTR
3322 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3324 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3325 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3329 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3331 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3332 return PerlSIO_get_cnt(stdio);
3336 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3338 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3340 #ifdef STDIO_PTR_LVALUE
3341 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3342 #ifdef STDIO_PTR_LVAL_SETS_CNT
3343 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3344 assert(PerlSIO_get_cnt(stdio) == (cnt));
3347 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3349 * Setting ptr _does_ change cnt - we are done
3353 #else /* STDIO_PTR_LVALUE */
3355 #endif /* STDIO_PTR_LVALUE */
3358 * Now (or only) set cnt
3360 #ifdef STDIO_CNT_LVALUE
3361 PerlSIO_set_cnt(stdio, cnt);
3362 #else /* STDIO_CNT_LVALUE */
3363 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3364 PerlSIO_set_ptr(stdio,
3365 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3367 #else /* STDIO_PTR_LVAL_SETS_CNT */
3369 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3370 #endif /* STDIO_CNT_LVALUE */
3377 PerlIOStdio_fill(pTHX_ PerlIO *f)
3379 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3381 PERL_UNUSED_CONTEXT;
3384 * fflush()ing read-only streams can cause trouble on some stdio-s
3386 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3387 if (PerlSIO_fflush(stdio) != 0)
3390 c = PerlSIO_fgetc(stdio);
3394 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3396 #ifdef STDIO_BUFFER_WRITABLE
3397 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3398 /* Fake ungetc() to the real buffer in case system's ungetc
3401 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3402 SSize_t cnt = PerlSIO_get_cnt(stdio);
3403 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3404 if (ptr == base+1) {
3405 *--ptr = (STDCHAR) c;
3406 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3407 if (PerlSIO_feof(stdio))
3408 PerlSIO_clearerr(stdio);
3414 if (PerlIO_has_cntptr(f)) {
3416 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3423 /* An ungetc()d char is handled separately from the regular
3424 * buffer, so we stuff it in the buffer ourselves.
3425 * Should never get called as should hit code above
3427 *(--((*stdio)->_ptr)) = (unsigned char) c;
3430 /* If buffer snoop scheme above fails fall back to
3433 if (PerlSIO_ungetc(c, stdio) != c)
3441 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3442 sizeof(PerlIO_funcs),
3444 sizeof(PerlIOStdio),
3445 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3449 PerlIOBase_binmode, /* binmode */
3463 PerlIOStdio_clearerr,
3464 PerlIOStdio_setlinebuf,
3466 PerlIOStdio_get_base,
3467 PerlIOStdio_get_bufsiz,
3472 #ifdef USE_STDIO_PTR
3473 PerlIOStdio_get_ptr,
3474 PerlIOStdio_get_cnt,
3475 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3476 PerlIOStdio_set_ptrcnt,
3479 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3484 #endif /* USE_STDIO_PTR */
3487 /* Note that calls to PerlIO_exportFILE() are reversed using
3488 * PerlIO_releaseFILE(), not importFILE. */
3490 PerlIO_exportFILE(PerlIO * f, const char *mode)
3494 if (PerlIOValid(f)) {
3497 if (!mode || !*mode) {
3498 mode = PerlIO_modestr(f, buf);
3500 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3504 /* De-link any lower layers so new :stdio sticks */
3506 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3507 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3509 /* Link previous lower layers under new one */
3513 /* restore layers list */
3523 PerlIO_findFILE(PerlIO *f)
3527 if (l->tab == &PerlIO_stdio) {
3528 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3531 l = *PerlIONext(&l);
3533 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3534 return PerlIO_exportFILE(f, NULL);
3537 /* Use this to reverse PerlIO_exportFILE calls. */
3539 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3544 if (l->tab == &PerlIO_stdio) {
3545 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3546 if (s->stdio == f) {
3548 PerlIO_pop(aTHX_ p);
3557 /*--------------------------------------------------------------------------------------*/
3559 * perlio buffer layer
3563 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3565 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3566 const int fd = PerlIO_fileno(f);
3567 if (fd >= 0 && PerlLIO_isatty(fd)) {
3568 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3570 if (*PerlIONext(f)) {
3571 const Off_t posn = PerlIO_tell(PerlIONext(f));
3572 if (posn != (Off_t) - 1) {
3576 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3580 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3581 IV n, const char *mode, int fd, int imode, int perm,
3582 PerlIO *f, int narg, SV **args)
3584 if (PerlIOValid(f)) {
3585 PerlIO *next = PerlIONext(f);
3587 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3588 if (tab && tab->Open)
3590 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3592 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3597 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3599 if (*mode == IoTYPE_IMPLICIT) {
3605 if (tab && tab->Open)
3606 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3609 SETERRNO(EINVAL, LIB_INVARG);
3611 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3613 * if push fails during open, open fails. close will pop us.
3618 fd = PerlIO_fileno(f);
3619 if (init && fd == 2) {
3621 * Initial stderr is unbuffered
3623 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3625 #ifdef PERLIO_USING_CRLF
3626 # ifdef PERLIO_IS_BINMODE_FD
3627 if (PERLIO_IS_BINMODE_FD(fd))
3628 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3632 * do something about failing setmode()? --jhi
3634 PerlLIO_setmode(fd, O_BINARY);
3643 * This "flush" is akin to sfio's sync in that it handles files in either
3644 * read or write state. For write state, we put the postponed data through
3645 * the next layers. For read state, we seek() the next layers to the
3646 * offset given by current position in the buffer, and discard the buffer
3647 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3648 * in any case?). Then the pass the stick further in chain.
3651 PerlIOBuf_flush(pTHX_ PerlIO *f)
3653 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3655 PerlIO *n = PerlIONext(f);
3656 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3658 * write() the buffer
3660 const STDCHAR *buf = b->buf;
3661 const STDCHAR *p = buf;
3662 while (p < b->ptr) {
3663 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3667 else if (count < 0 || PerlIO_error(n)) {
3668 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3673 b->posn += (p - buf);
3675 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3676 STDCHAR *buf = PerlIO_get_base(f);
3678 * Note position change
3680 b->posn += (b->ptr - buf);
3681 if (b->ptr < b->end) {
3682 /* We did not consume all of it - try and seek downstream to
3683 our logical position
3685 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3686 /* Reload n as some layers may pop themselves on seek */
3687 b->posn = PerlIO_tell(n = PerlIONext(f));
3690 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3691 data is lost for good - so return saying "ok" having undone
3694 b->posn -= (b->ptr - buf);
3699 b->ptr = b->end = b->buf;
3700 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3701 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3702 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3707 /* This discards the content of the buffer after b->ptr, and rereads
3708 * the buffer from the position off in the layer downstream; here off
3709 * is at offset corresponding to b->ptr - b->buf.
3712 PerlIOBuf_fill(pTHX_ PerlIO *f)
3714 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3715 PerlIO *n = PerlIONext(f);
3718 * Down-stream flush is defined not to loose read data so is harmless.
3719 * we would not normally be fill'ing if there was data left in anycase.
3721 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3723 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3724 PerlIOBase_flush_linebuf(aTHX);
3727 PerlIO_get_base(f); /* allocate via vtable */
3729 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3731 b->ptr = b->end = b->buf;
3733 if (!PerlIOValid(n)) {
3734 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3738 if (PerlIO_fast_gets(n)) {
3740 * Layer below is also buffered. We do _NOT_ want to call its
3741 * ->Read() because that will loop till it gets what we asked for
3742 * which may hang on a pipe etc. Instead take anything it has to
3743 * hand, or ask it to fill _once_.
3745 avail = PerlIO_get_cnt(n);
3747 avail = PerlIO_fill(n);
3749 avail = PerlIO_get_cnt(n);
3751 if (!PerlIO_error(n) && PerlIO_eof(n))
3756 STDCHAR *ptr = PerlIO_get_ptr(n);
3757 const SSize_t cnt = avail;
3758 if (avail > (SSize_t)b->bufsiz)
3760 Copy(ptr, b->buf, avail, STDCHAR);
3761 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3765 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3769 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3771 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3774 b->end = b->buf + avail;
3775 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3780 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3782 if (PerlIOValid(f)) {
3783 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3786 return PerlIOBase_read(aTHX_ f, vbuf, count);
3792 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3794 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3795 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3798 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3803 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3805 * Buffer is already a read buffer, we can overwrite any chars
3806 * which have been read back to buffer start
3808 avail = (b->ptr - b->buf);
3812 * Buffer is idle, set it up so whole buffer is available for
3816 b->end = b->buf + avail;
3818 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3820 * Buffer extends _back_ from where we are now
3822 b->posn -= b->bufsiz;
3824 if (avail > (SSize_t) count) {
3826 * If we have space for more than count, just move count
3834 * In simple stdio-like ungetc() case chars will be already
3837 if (buf != b->ptr) {
3838 Copy(buf, b->ptr, avail, STDCHAR);
3842 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3846 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3852 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3854 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3855 const STDCHAR *buf = (const STDCHAR *) vbuf;
3856 const STDCHAR *flushptr = buf;
3860 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3862 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3863 if (PerlIO_flush(f) != 0) {
3867 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3868 flushptr = buf + count;
3869 while (flushptr > buf && *(flushptr - 1) != '\n')
3873 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3874 if ((SSize_t) count < avail)
3876 if (flushptr > buf && flushptr <= buf + avail)
3877 avail = flushptr - buf;
3878 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3880 Copy(buf, b->ptr, avail, STDCHAR);
3885 if (buf == flushptr)
3888 if (b->ptr >= (b->buf + b->bufsiz))
3891 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3897 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3900 if ((code = PerlIO_flush(f)) == 0) {
3901 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3902 code = PerlIO_seek(PerlIONext(f), offset, whence);
3904 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3905 b->posn = PerlIO_tell(PerlIONext(f));
3912 PerlIOBuf_tell(pTHX_ PerlIO *f)
3914 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3916 * b->posn is file position where b->buf was read, or will be written
3918 Off_t posn = b->posn;
3919 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3920 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3922 /* As O_APPEND files are normally shared in some sense it is better
3927 /* when file is NOT shared then this is sufficient */
3928 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3930 posn = b->posn = PerlIO_tell(PerlIONext(f));
3934 * If buffer is valid adjust position by amount in buffer
3936 posn += (b->ptr - b->buf);
3942 PerlIOBuf_popped(pTHX_ PerlIO *f)
3944 const IV code = PerlIOBase_popped(aTHX_ f);
3945 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3946 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3949 b->ptr = b->end = b->buf = NULL;
3950 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3955 PerlIOBuf_close(pTHX_ PerlIO *f)
3957 const IV code = PerlIOBase_close(aTHX_ f);
3958 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3959 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3962 b->ptr = b->end = b->buf = NULL;
3963 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3968 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3970 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3977 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3979 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3982 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3983 return (b->end - b->ptr);
3988 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3990 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3991 PERL_UNUSED_CONTEXT;
3996 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3998 b->buf = (STDCHAR *) & b->oneword;
3999 b->bufsiz = sizeof(b->oneword);
4001 b->end = b->ptr = b->buf;
4007 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4009 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4012 return (b->end - b->buf);
4016 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4018 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4022 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4023 assert(PerlIO_get_cnt(f) == cnt);
4024 assert(b->ptr >= b->buf);
4026 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4030 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4032 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4037 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4038 sizeof(PerlIO_funcs),
4041 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4045 PerlIOBase_binmode, /* binmode */
4059 PerlIOBase_clearerr,
4060 PerlIOBase_setlinebuf,
4065 PerlIOBuf_set_ptrcnt,
4068 /*--------------------------------------------------------------------------------------*/
4070 * Temp layer to hold unread chars when cannot do it any other way
4074 PerlIOPending_fill(pTHX_ PerlIO *f)
4077 * Should never happen
4084 PerlIOPending_close(pTHX_ PerlIO *f)
4087 * A tad tricky - flush pops us, then we close new top
4090 return PerlIO_close(f);
4094 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4097 * A tad tricky - flush pops us, then we seek new top
4100 return PerlIO_seek(f, offset, whence);
4105 PerlIOPending_flush(pTHX_ PerlIO *f)
4107 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4108 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4112 PerlIO_pop(aTHX_ f);
4117 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4123 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4128 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4130 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4131 PerlIOl * const l = PerlIOBase(f);
4133 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4134 * etc. get muddled when it changes mid-string when we auto-pop.
4136 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4137 (PerlIOBase(PerlIONext(f))->
4138 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4143 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4145 SSize_t avail = PerlIO_get_cnt(f);
4147 if ((SSize_t)count < avail)
4150 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4151 if (got >= 0 && got < (SSize_t)count) {
4152 const SSize_t more =
4153 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4154 if (more >= 0 || got == 0)
4160 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4161 sizeof(PerlIO_funcs),
4164 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4165 PerlIOPending_pushed,
4168 PerlIOBase_binmode, /* binmode */
4177 PerlIOPending_close,
4178 PerlIOPending_flush,
4182 PerlIOBase_clearerr,
4183 PerlIOBase_setlinebuf,
4188 PerlIOPending_set_ptrcnt,
4193 /*--------------------------------------------------------------------------------------*/
4195 * crlf - translation On read translate CR,LF to "\n" we do this by
4196 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4197 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4199 * c->nl points on the first byte of CR LF pair when it is temporarily
4200 * replaced by LF, or to the last CR of the buffer. In the former case
4201 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4202 * that it ends at c->nl; these two cases can be distinguished by
4203 * *c->nl. c->nl is set during _getcnt() call, and unset during
4204 * _unread() and _flush() calls.
4205 * It only matters for read operations.
4209 PerlIOBuf base; /* PerlIOBuf stuff */
4210 STDCHAR *nl; /* Position of crlf we "lied" about in the
4215 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4218 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4219 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4221 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4222 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4223 PerlIOBase(f)->flags);
4226 /* Enable the first CRLF capable layer you can find, but if none
4227 * found, the one we just pushed is fine. This results in at
4228 * any given moment at most one CRLF-capable layer being enabled
4229 * in the whole layer stack. */
4230 PerlIO *g = PerlIONext(f);
4232 PerlIOl *b = PerlIOBase(g);
4233 if (b && b->tab == &PerlIO_crlf) {
4234 if (!(b->flags & PERLIO_F_CRLF))
4235 b->flags |= PERLIO_F_CRLF;
4236 PerlIO_pop(aTHX_ f);
4247 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4249 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4250 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4254 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4255 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4257 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4258 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4260 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4265 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4266 b->end = b->ptr = b->buf + b->bufsiz;
4267 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4268 b->posn -= b->bufsiz;
4270 while (count > 0 && b->ptr > b->buf) {
4271 const int ch = *--buf;
4273 if (b->ptr - 2 >= b->buf) {
4280 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4281 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4297 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4299 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4301 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4304 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4305 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4306 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4307 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4309 while (nl < b->end && *nl != 0xd)
4311 if (nl < b->end && *nl == 0xd) {
4313 if (nl + 1 < b->end) {
4320 * Not CR,LF but just CR
4328 * Blast - found CR as last char in buffer
4333 * They may not care, defer work as long as
4337 return (nl - b->ptr);
4341 b->ptr++; /* say we have read it as far as
4342 * flush() is concerned */
4343 b->buf++; /* Leave space in front of buffer */
4344 /* Note as we have moved buf up flush's
4346 will naturally make posn point at CR
4348 b->bufsiz--; /* Buffer is thus smaller */
4349 code = PerlIO_fill(f); /* Fetch some more */
4350 b->bufsiz++; /* Restore size for next time */
4351 b->buf--; /* Point at space */
4352 b->ptr = nl = b->buf; /* Which is what we hand
4354 *nl = 0xd; /* Fill in the CR */
4356 goto test; /* fill() call worked */
4358 * CR at EOF - just fall through
4360 /* Should we clear EOF though ??? */
4365 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4371 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4373 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4374 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4380 if (ptr == b->end && *c->nl == 0xd) {
4381 /* Defered CR at end of buffer case - we lied about count */
4394 * Test code - delete when it works ...
4396 IV flags = PerlIOBase(f)->flags;
4397 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4398 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4399 /* Defered CR at end of buffer case - we lied about count */
4405 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4406 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4414 * They have taken what we lied about
4422 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4426 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4428 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4429 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4431 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4432 const STDCHAR *buf = (const STDCHAR *) vbuf;
4433 const STDCHAR * const ebuf = buf + count;
4436 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4438 while (buf < ebuf) {
4439 const STDCHAR * const eptr = b->buf + b->bufsiz;
4440 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4441 while (buf < ebuf && b->ptr < eptr) {
4443 if ((b->ptr + 2) > eptr) {
4451 *(b->ptr)++ = 0xd; /* CR */
4452 *(b->ptr)++ = 0xa; /* LF */
4454 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4461 *(b->ptr)++ = *buf++;
4463 if (b->ptr >= eptr) {
4469 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4471 return (buf - (STDCHAR *) vbuf);
4476 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4478 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4483 return PerlIOBuf_flush(aTHX_ f);
4487 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4489 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4490 /* In text mode - flush any pending stuff and flip it */
4491 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4492 #ifndef PERLIO_USING_CRLF
4493 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4494 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4495 PerlIO_pop(aTHX_ f);
4502 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4503 sizeof(PerlIO_funcs),
4506 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4508 PerlIOBuf_popped, /* popped */
4510 PerlIOCrlf_binmode, /* binmode */
4514 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4515 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4516 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4524 PerlIOBase_clearerr,
4525 PerlIOBase_setlinebuf,
4530 PerlIOCrlf_set_ptrcnt,
4534 /*--------------------------------------------------------------------------------------*/
4536 * mmap as "buffer" layer
4540 PerlIOBuf base; /* PerlIOBuf stuff */
4541 Mmap_t mptr; /* Mapped address */
4542 Size_t len; /* mapped length */
4543 STDCHAR *bbuf; /* malloced buffer if map fails */
4547 PerlIOMmap_map(pTHX_ PerlIO *f)
4550 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4551 const IV flags = PerlIOBase(f)->flags;
4555 if (flags & PERLIO_F_CANREAD) {
4556 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4557 const int fd = PerlIO_fileno(f);
4559 code = Fstat(fd, &st);
4560 if (code == 0 && S_ISREG(st.st_mode)) {
4561 SSize_t len = st.st_size - b->posn;
4564 if (PL_mmap_page_size <= 0)
4565 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4569 * This is a hack - should never happen - open should
4572 b->posn = PerlIO_tell(PerlIONext(f));
4574 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4575 len = st.st_size - posn;
4576 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4577 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4578 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4579 madvise(m->mptr, len, MADV_SEQUENTIAL);
4581 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4582 madvise(m->mptr, len, MADV_WILLNEED);
4584 PerlIOBase(f)->flags =
4585 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4586 b->end = ((STDCHAR *) m->mptr) + len;
4587 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4596 PerlIOBase(f)->flags =
4597 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4599 b->ptr = b->end = b->ptr;
4608 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4610 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4613 PerlIOBuf * const b = &m->base;
4615 code = munmap(m->mptr, m->len);
4619 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4622 b->ptr = b->end = b->buf;
4623 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4629 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4631 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4632 PerlIOBuf * const b = &m->base;
4633 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4635 * Already have a readbuffer in progress
4641 * We have a write buffer or flushed PerlIOBuf read buffer
4643 m->bbuf = b->buf; /* save it in case we need it again */
4644 b->buf = NULL; /* Clear to trigger below */
4647 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4650 * Map did not work - recover PerlIOBuf buffer if we have one
4655 b->ptr = b->end = b->buf;
4658 return PerlIOBuf_get_base(aTHX_ f);
4662 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4664 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4665 PerlIOBuf * const b = &m->base;
4666 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4668 if (b->ptr && (b->ptr - count) >= b->buf
4669 && memEQ(b->ptr - count, vbuf, count)) {
4671 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4676 * Loose the unwritable mapped buffer
4680 * If flush took the "buffer" see if we have one from before
4682 if (!b->buf && m->bbuf)
4685 PerlIOBuf_get_base(aTHX_ f);
4689 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4693 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4695 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4696 PerlIOBuf * const b = &m->base;
4698 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4700 * No, or wrong sort of, buffer
4703 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4707 * If unmap took the "buffer" see if we have one from before
4709 if (!b->buf && m->bbuf)
4712 PerlIOBuf_get_base(aTHX_ f);
4716 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4720 PerlIOMmap_flush(pTHX_ PerlIO *f)
4722 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4723 PerlIOBuf * const b = &m->base;
4724 IV code = PerlIOBuf_flush(aTHX_ f);
4726 * Now we are "synced" at PerlIOBuf level
4733 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4738 * We seem to have a PerlIOBuf buffer which was not mapped
4739 * remember it in case we need one later
4748 PerlIOMmap_fill(pTHX_ PerlIO *f)
4750 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4751 IV code = PerlIO_flush(f);
4752 if (code == 0 && !b->buf) {
4753 code = PerlIOMmap_map(aTHX_ f);
4755 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4756 code = PerlIOBuf_fill(aTHX_ f);
4762 PerlIOMmap_close(pTHX_ PerlIO *f)
4764 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4765 PerlIOBuf * const b = &m->base;
4766 IV code = PerlIO_flush(f);
4770 b->ptr = b->end = b->buf;
4772 if (PerlIOBuf_close(aTHX_ f) != 0)
4778 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4780 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4784 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4785 sizeof(PerlIO_funcs),
4788 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4792 PerlIOBase_binmode, /* binmode */
4806 PerlIOBase_clearerr,
4807 PerlIOBase_setlinebuf,
4808 PerlIOMmap_get_base,
4812 PerlIOBuf_set_ptrcnt,
4815 #endif /* HAS_MMAP */
4818 Perl_PerlIO_stdin(pTHX)
4822 PerlIO_stdstreams(aTHX);
4824 return &PL_perlio[1];
4828 Perl_PerlIO_stdout(pTHX)
4832 PerlIO_stdstreams(aTHX);
4834 return &PL_perlio[2];
4838 Perl_PerlIO_stderr(pTHX)
4842 PerlIO_stdstreams(aTHX);
4844 return &PL_perlio[3];
4847 /*--------------------------------------------------------------------------------------*/
4850 PerlIO_getname(PerlIO *f, char *buf)
4855 bool exported = FALSE;
4856 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4858 stdio = PerlIO_exportFILE(f,0);
4862 name = fgetname(stdio, buf);
4863 if (exported) PerlIO_releaseFILE(f,stdio);
4868 PERL_UNUSED_ARG(buf);
4869 Perl_croak(aTHX_ "Don't know how to get file name");
4875 /*--------------------------------------------------------------------------------------*/
4877 * Functions which can be called on any kind of PerlIO implemented in
4881 #undef PerlIO_fdopen
4883 PerlIO_fdopen(int fd, const char *mode)
4886 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4891 PerlIO_open(const char *path, const char *mode)
4894 SV *name = sv_2mortal(newSVpv(path, 0));
4895 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4898 #undef Perlio_reopen
4900 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4903 SV *name = sv_2mortal(newSVpv(path,0));
4904 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4909 PerlIO_getc(PerlIO *f)
4913 if ( 1 == PerlIO_read(f, buf, 1) ) {
4914 return (unsigned char) buf[0];
4919 #undef PerlIO_ungetc
4921 PerlIO_ungetc(PerlIO *f, int ch)
4926 if (PerlIO_unread(f, &buf, 1) == 1)
4934 PerlIO_putc(PerlIO *f, int ch)
4938 return PerlIO_write(f, &buf, 1);
4943 PerlIO_puts(PerlIO *f, const char *s)
4946 return PerlIO_write(f, s, strlen(s));
4949 #undef PerlIO_rewind
4951 PerlIO_rewind(PerlIO *f)
4954 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4958 #undef PerlIO_vprintf
4960 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4963 SV * const sv = newSVpvs("");
4969 Perl_va_copy(ap, apc);
4970 sv_vcatpvf(sv, fmt, &apc);
4972 sv_vcatpvf(sv, fmt, &ap);
4974 s = SvPV_const(sv, len);
4975 wrote = PerlIO_write(f, s, len);
4980 #undef PerlIO_printf
4982 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4987 result = PerlIO_vprintf(f, fmt, ap);
4992 #undef PerlIO_stdoutf
4994 PerlIO_stdoutf(const char *fmt, ...)
5000 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5005 #undef PerlIO_tmpfile
5007 PerlIO_tmpfile(void)
5012 const int fd = win32_tmpfd();
5014 f = PerlIO_fdopen(fd, "w+b");
5016 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5017 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5019 * I have no idea how portable mkstemp() is ... NI-S
5021 const int fd = mkstemp(SvPVX(sv));
5023 f = PerlIO_fdopen(fd, "w+");
5025 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5026 PerlLIO_unlink(SvPVX_const(sv));
5029 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5030 FILE * const stdio = PerlSIO_tmpfile();
5033 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5034 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5036 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5042 # endif /* else HAS_MKSTEMP */
5043 #endif /* else WIN32 */
5050 #endif /* USE_SFIO */
5051 #endif /* PERLIO_IS_STDIO */
5053 /*======================================================================================*/
5055 * Now some functions in terms of above which may be needed even if we are
5056 * not in true PerlIO mode
5060 #undef PerlIO_setpos
5062 PerlIO_setpos(PerlIO *f, SV *pos)
5067 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5068 if (f && len == sizeof(Off_t))
5069 return PerlIO_seek(f, *posn, SEEK_SET);
5071 SETERRNO(EINVAL, SS_IVCHAN);
5075 #undef PerlIO_setpos
5077 PerlIO_setpos(PerlIO *f, SV *pos)
5082 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5083 if (f && len == sizeof(Fpos_t)) {
5084 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5085 return fsetpos64(f, fpos);
5087 return fsetpos(f, fpos);
5091 SETERRNO(EINVAL, SS_IVCHAN);
5097 #undef PerlIO_getpos
5099 PerlIO_getpos(PerlIO *f, SV *pos)
5102 Off_t posn = PerlIO_tell(f);
5103 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5104 return (posn == (Off_t) - 1) ? -1 : 0;
5107 #undef PerlIO_getpos
5109 PerlIO_getpos(PerlIO *f, SV *pos)
5114 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5115 code = fgetpos64(f, &fpos);
5117 code = fgetpos(f, &fpos);
5119 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5124 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5127 vprintf(char *pat, char *args)
5129 _doprnt(pat, args, stdout);
5130 return 0; /* wrong, but perl doesn't use the return
5135 vfprintf(FILE *fd, char *pat, char *args)
5137 _doprnt(pat, args, fd);
5138 return 0; /* wrong, but perl doesn't use the return
5144 #ifndef PerlIO_vsprintf
5146 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5149 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5150 #ifndef PERL_MY_VSNPRINTF_GUARDED
5151 if (val < 0 || (n > 0 ? val >= n : 0)) {
5152 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5159 #ifndef PerlIO_sprintf
5161 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5166 result = PerlIO_vsprintf(s, n, fmt, ap);
5174 * c-indentation-style: bsd
5176 * indent-tabs-mode: t
5179 * ex: set ts=8 sts=4 sw=4 noet: