2 * perlio.c Copyright (c) 1996-2005, 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
36 #define PERLIO_NOT_STDIO 0
37 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
43 * This file provides those parts of PerlIO abstraction
44 * which are not #defined in perlio.h.
45 * Which these are depends on various Configure #ifdef's
49 #define PERL_IN_PERLIO_C
52 #ifdef PERL_IMPLICIT_CONTEXT
59 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
62 /* Missing proto on LynxOS */
66 /* Call the callback or PerlIOBase, and return failure. */
67 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
68 if (PerlIOValid(f)) { \
69 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
70 if (tab && tab->callback) \
71 return (*tab->callback) args; \
73 return PerlIOBase_ ## base args; \
76 SETERRNO(EBADF, SS_IVCHAN); \
79 /* Call the callback or fail, and return failure. */
80 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
81 if (PerlIOValid(f)) { \
82 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
83 if (tab && tab->callback) \
84 return (*tab->callback) args; \
85 SETERRNO(EINVAL, LIB_INVARG); \
88 SETERRNO(EBADF, SS_IVCHAN); \
91 /* Call the callback or PerlIOBase, and be void. */
92 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
93 if (PerlIOValid(f)) { \
94 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
95 if (tab && tab->callback) \
96 (*tab->callback) args; \
98 PerlIOBase_ ## base args; \
101 SETERRNO(EBADF, SS_IVCHAN)
103 /* Call the callback or fail, and be void. */
104 #define Perl_PerlIO_or_fail_void(f, callback, args) \
105 if (PerlIOValid(f)) { \
106 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
107 if (tab && tab->callback) \
108 (*tab->callback) args; \
110 SETERRNO(EINVAL, LIB_INVARG); \
113 SETERRNO(EBADF, SS_IVCHAN)
117 perlsio_binmode(FILE *fp, int iotype, int mode)
120 * This used to be contents of do_binmode in doio.c
123 # if defined(atarist) || defined(__MINT__)
126 ((FILE *) fp)->_flag |= _IOBIN;
128 ((FILE *) fp)->_flag &= ~_IOBIN;
135 if (PerlLIO_setmode(fp, mode) != -1) {
137 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
139 # if defined(WIN32) && defined(__BORLANDC__)
141 * The translation mode of the stream is maintained independent
143 * the translation mode of the fd in the Borland RTL (heavy
144 * digging through their runtime sources reveal). User has to
146 * the mode explicitly for the stream (though they don't
148 * this anywhere). GSAR 97-5-24
154 fp->flags &= ~_F_BIN;
162 # if defined(USEMYBINMODE)
164 if (my_binmode(fp, iotype, mode) != FALSE)
170 PERL_UNUSED_ARG(iotype);
171 PERL_UNUSED_ARG(mode);
179 #define O_ACCMODE 3 /* Assume traditional implementation */
183 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
185 const int result = rawmode & O_ACCMODE;
190 ptype = IoTYPE_RDONLY;
193 ptype = IoTYPE_WRONLY;
201 *writing = (result != O_RDONLY);
203 if (result == O_RDONLY) {
207 else if (rawmode & O_APPEND) {
209 if (result != O_WRONLY)
214 if (result == O_WRONLY)
221 if (rawmode & O_BINARY)
227 #ifndef PERLIO_LAYERS
229 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
231 if (!names || !*names
232 || strEQ(names, ":crlf")
233 || strEQ(names, ":raw")
234 || strEQ(names, ":bytes")
238 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
246 PerlIO_destruct(pTHX)
251 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
254 PERL_UNUSED_ARG(iotype);
255 PERL_UNUSED_ARG(mode);
256 PERL_UNUSED_ARG(names);
259 return perlsio_binmode(fp, iotype, mode);
264 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
266 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
269 #ifdef PERL_IMPLICIT_SYS
270 return PerlSIO_fdupopen(f);
273 return win32_fdupopen(f);
276 const int fd = PerlLIO_dup(PerlIO_fileno(f));
279 int omode = fcntl(fd, F_GETFL);
281 omode = djgpp_get_stream_mode(f);
283 PerlIO_intmode2str(omode,mode,NULL);
284 /* the r+ is a hack */
285 return PerlIO_fdopen(fd, mode);
290 SETERRNO(EBADF, SS_IVCHAN);
300 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
304 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
305 int imode, int perm, PerlIO *old, int narg, SV **args)
309 Perl_croak(aTHX_ "More than one argument to open");
311 if (*args == &PL_sv_undef)
312 return PerlIO_tmpfile();
314 const char *name = SvPV_nolen_const(*args);
315 if (*mode == IoTYPE_NUMERIC) {
316 fd = PerlLIO_open3(name, imode, perm);
318 return PerlIO_fdopen(fd, mode + 1);
321 return PerlIO_reopen(name, mode, old);
324 return PerlIO_open(name, mode);
329 return PerlIO_fdopen(fd, (char *) mode);
334 XS(XS_PerlIO__Layer__find)
338 Perl_croak(aTHX_ "Usage class->find(name[,load])");
340 const char *name = SvPV_nolen_const(ST(1));
341 ST(0) = (strEQ(name, "crlf")
342 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
349 Perl_boot_core_PerlIO(pTHX)
351 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
357 #ifdef PERLIO_IS_STDIO
363 * Does nothing (yet) except force this file to be included in perl
364 * binary. That allows this file to force inclusion of other functions
365 * that may be required by loadable extensions e.g. for
366 * FileHandle::tmpfile
370 #undef PerlIO_tmpfile
377 #else /* PERLIO_IS_STDIO */
385 * This section is just to make sure these functions get pulled in from
389 #undef PerlIO_tmpfile
400 * Force this file to be included in perl binary. Which allows this
401 * file to force inclusion of other functions that may be required by
402 * loadable extensions e.g. for FileHandle::tmpfile
406 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
407 * results in a lot of lseek()s to regular files and lot of small
410 sfset(sfstdout, SF_SHARE, 0);
413 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
415 PerlIO_importFILE(FILE *stdio, const char *mode)
417 const int fd = fileno(stdio);
418 if (!mode || !*mode) {
421 return PerlIO_fdopen(fd, mode);
425 PerlIO_findFILE(PerlIO *pio)
427 const int fd = PerlIO_fileno(pio);
428 FILE * const f = fdopen(fd, "r+");
430 if (!f && errno == EINVAL)
432 if (!f && errno == EINVAL)
439 /*======================================================================================*/
441 * Implement all the PerlIO interface ourselves.
447 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
454 #include <sys/mman.h>
458 PerlIO_debug(const char *fmt, ...)
463 if (!PL_perlio_debug_fd && !PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
464 const char *s = PerlEnv_getenv("PERLIO_DEBUG");
466 PL_perlio_debug_fd = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
468 PL_perlio_debug_fd = -1;
470 if (PL_perlio_debug_fd > 0) {
472 const char *s = CopFILE(PL_curcop);
475 /* Use fixed buffer as sv_catpvf etc. needs SVs */
479 len = sprintf(buffer, "%.40s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
480 vsprintf(buffer+len, fmt, ap);
481 PerlLIO_write(PL_perlio_debug_fd, buffer, strlen(buffer));
483 SV *sv = newSVpvn("", 0);
486 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
487 (IV) CopLINE(PL_curcop));
488 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
490 s = SvPV_const(sv, len);
491 PerlLIO_write(PL_perlio_debug_fd, s, len);
498 /*--------------------------------------------------------------------------------------*/
501 * Inner level routines
505 * Table of pointers to the PerlIO structs (malloc'ed)
507 #define PERLIO_TABLE_SIZE 64
510 PerlIO_allocate(pTHX)
513 * Find a free slot in the table, allocating new table as necessary
518 while ((f = *last)) {
520 last = (PerlIO **) (f);
521 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
527 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
535 #undef PerlIO_fdupopen
537 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
539 if (PerlIOValid(f)) {
540 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
541 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
543 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
545 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
549 SETERRNO(EBADF, SS_IVCHAN);
555 PerlIO_cleantable(pTHX_ PerlIO **tablep)
557 PerlIO *table = *tablep;
560 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
561 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
562 PerlIO *f = table + i;
574 PerlIO_list_alloc(pTHX)
577 Newxz(list, 1, PerlIO_list_t);
583 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
586 if (--list->refcnt == 0) {
589 for (i = 0; i < list->cur; i++) {
590 if (list->array[i].arg)
591 SvREFCNT_dec(list->array[i].arg);
593 Safefree(list->array);
601 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
604 if (list->cur >= list->len) {
607 Renew(list->array, list->len, PerlIO_pair_t);
609 Newx(list->array, list->len, PerlIO_pair_t);
611 p = &(list->array[list->cur++]);
613 if ((p->arg = arg)) {
614 (void)SvREFCNT_inc(arg);
619 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
621 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
624 list = PerlIO_list_alloc(aTHX);
625 for (i=0; i < proto->cur; i++) {
627 if (proto->array[i].arg)
628 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
629 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
636 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
639 PerlIO **table = &proto->Iperlio;
642 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
643 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
644 PerlIO_allocate(aTHX); /* root slot is never used */
645 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
646 while ((f = *table)) {
648 table = (PerlIO **) (f++);
649 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
651 (void) fp_dup(f, 0, param);
657 PERL_UNUSED_ARG(proto);
658 PERL_UNUSED_ARG(param);
663 PerlIO_destruct(pTHX)
665 PerlIO **table = &PL_perlio;
668 PerlIO_debug("Destruct %p\n",aTHX);
670 while ((f = *table)) {
672 table = (PerlIO **) (f++);
673 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
677 if (l->tab->kind & PERLIO_K_DESTRUCT) {
678 PerlIO_debug("Destruct popping %s\n", l->tab->name);
692 PerlIO_pop(pTHX_ PerlIO *f)
696 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
697 if (l->tab->Popped) {
699 * If popped returns non-zero do not free its layer structure
700 * it has either done so itself, or it is shared and still in
703 if ((*l->tab->Popped) (aTHX_ f) != 0)
711 /* Return as an array the stack of layers on a filehandle. Note that
712 * the stack is returned top-first in the array, and there are three
713 * times as many array elements as there are layers in the stack: the
714 * first element of a layer triplet is the name, the second one is the
715 * arguments, and the third one is the flags. */
718 PerlIO_get_layers(pTHX_ PerlIO *f)
722 if (PerlIOValid(f)) {
723 PerlIOl *l = PerlIOBase(f);
726 SV *name = l->tab && l->tab->name ?
727 newSVpv(l->tab->name, 0) : &PL_sv_undef;
728 SV *arg = l->tab && l->tab->Getarg ?
729 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
732 av_push(av, newSViv((IV)l->flags));
740 /*--------------------------------------------------------------------------------------*/
742 * XS Interface for perl code
746 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
750 if ((SSize_t) len <= 0)
752 for (i = 0; i < PL_known_layers->cur; i++) {
753 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
754 if (memEQ(f->name, name, len) && f->name[len] == 0) {
755 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
759 if (load && PL_subname && PL_def_layerlist
760 && PL_def_layerlist->cur >= 2) {
761 if (PL_in_load_module) {
762 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
765 SV * const pkgsv = newSVpvn("PerlIO", 6);
766 SV * const layer = newSVpvn(name, len);
767 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
769 SAVEINT(PL_in_load_module);
771 SAVEGENERICSV(PL_warnhook);
772 (void)SvREFCNT_inc(cv);
773 PL_warnhook = (SV *) cv;
777 * The two SVs are magically freed by load_module
779 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
782 return PerlIO_find_layer(aTHX_ name, len, 0);
785 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
789 #ifdef USE_ATTRIBUTES_FOR_PERLIO
792 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
795 IO *io = GvIOn((GV *) SvRV(sv));
796 PerlIO *ifp = IoIFP(io);
797 PerlIO *ofp = IoOFP(io);
798 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
804 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
807 IO *io = GvIOn((GV *) SvRV(sv));
808 PerlIO *ifp = IoIFP(io);
809 PerlIO *ofp = IoOFP(io);
810 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
816 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
818 Perl_warn(aTHX_ "clear %" SVf, sv);
823 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
825 Perl_warn(aTHX_ "free %" SVf, sv);
829 MGVTBL perlio_vtab = {
837 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
840 SV *sv = SvRV(ST(1));
845 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
847 mg = mg_find(sv, PERL_MAGIC_ext);
848 mg->mg_virtual = &perlio_vtab;
850 Perl_warn(aTHX_ "attrib %" SVf, sv);
851 for (i = 2; i < items; i++) {
853 const char *name = SvPV_const(ST(i), len);
854 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
856 av_push(av, SvREFCNT_inc(layer));
867 #endif /* USE_ATTIBUTES_FOR_PERLIO */
870 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
872 HV * const stash = gv_stashpv("PerlIO::Layer", TRUE);
873 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
877 XS(XS_PerlIO__Layer__NoWarnings)
879 /* This is used as a %SIG{__WARN__} handler to supress warnings
880 during loading of layers.
884 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
888 XS(XS_PerlIO__Layer__find)
892 Perl_croak(aTHX_ "Usage class->find(name[,load])");
895 const char * const name = SvPV_const(ST(1), len);
896 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
897 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
899 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
906 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
908 if (!PL_known_layers)
909 PL_known_layers = PerlIO_list_alloc(aTHX);
910 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
911 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
915 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
918 const char *s = names;
920 while (isSPACE(*s) || *s == ':')
925 const char *as = Nullch;
927 if (!isIDFIRST(*s)) {
929 * Message is consistent with how attribute lists are
930 * passed. Even though this means "foo : : bar" is
931 * seen as an invalid separator character.
933 const char q = ((*s == '\'') ? '"' : '\'');
934 if (ckWARN(WARN_LAYER))
935 Perl_warner(aTHX_ packWARN(WARN_LAYER),
936 "Invalid separator character %c%c%c in PerlIO layer specification %s",
938 SETERRNO(EINVAL, LIB_INVARG);
943 } while (isALNUM(*e));
959 * It's a nul terminated string, not allowed
960 * to \ the terminating null. Anything other
961 * character is passed over.
971 if (ckWARN(WARN_LAYER))
972 Perl_warner(aTHX_ packWARN(WARN_LAYER),
973 "Argument list not closed for PerlIO layer \"%.*s\"",
985 PerlIO_funcs * const layer =
986 PerlIO_find_layer(aTHX_ s, llen, 1);
988 PerlIO_list_push(aTHX_ av, layer,
994 if (ckWARN(WARN_LAYER))
995 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1008 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1010 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1011 #ifdef PERLIO_USING_CRLF
1014 if (PerlIO_stdio.Set_ptrcnt)
1015 tab = &PerlIO_stdio;
1017 PerlIO_debug("Pushing %s\n", tab->name);
1018 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1023 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1025 return av->array[n].arg;
1029 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1031 if (n >= 0 && n < av->cur) {
1032 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1033 av->array[n].funcs->name);
1034 return av->array[n].funcs;
1037 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1042 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1044 PERL_UNUSED_ARG(mode);
1045 PERL_UNUSED_ARG(arg);
1046 PERL_UNUSED_ARG(tab);
1047 if (PerlIOValid(f)) {
1049 PerlIO_pop(aTHX_ f);
1055 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1056 sizeof(PerlIO_funcs),
1059 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1079 NULL, /* get_base */
1080 NULL, /* get_bufsiz */
1083 NULL, /* set_ptrcnt */
1087 PerlIO_default_layers(pTHX)
1089 if (!PL_def_layerlist) {
1090 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1091 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1092 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1093 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1095 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1097 osLayer = &PerlIO_win32;
1100 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1101 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1102 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1103 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1105 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1107 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1108 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1109 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1110 PerlIO_list_push(aTHX_ PL_def_layerlist,
1111 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1114 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1117 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1120 if (PL_def_layerlist->cur < 2) {
1121 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1123 return PL_def_layerlist;
1127 Perl_boot_core_PerlIO(pTHX)
1129 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1130 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1133 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1134 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1138 PerlIO_default_layer(pTHX_ I32 n)
1140 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1143 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1146 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1147 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1150 PerlIO_stdstreams(pTHX)
1153 PerlIO_allocate(aTHX);
1154 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1155 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1156 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1161 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1163 if (tab->fsize != sizeof(PerlIO_funcs)) {
1165 Perl_croak(aTHX_ "Layer does not match this perl");
1169 if (tab->size < sizeof(PerlIOl)) {
1172 /* Real layer with a data area */
1173 Newxc(l,tab->size,char,PerlIOl);
1175 Zero(l, tab->size, char);
1177 l->tab = (PerlIO_funcs*) tab;
1179 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1180 (mode) ? mode : "(Null)", (void*)arg);
1181 if (*l->tab->Pushed &&
1182 (*l->tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1183 PerlIO_pop(aTHX_ f);
1189 /* Pseudo-layer where push does its own stack adjust */
1190 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1191 (mode) ? mode : "(Null)", (void*)arg);
1193 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1201 PerlIOBase_binmode(pTHX_ PerlIO *f)
1203 if (PerlIOValid(f)) {
1204 /* Is layer suitable for raw stream ? */
1205 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1206 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1207 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1210 /* Not suitable - pop it */
1211 PerlIO_pop(aTHX_ f);
1219 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1221 PERL_UNUSED_ARG(mode);
1222 PERL_UNUSED_ARG(arg);
1223 PERL_UNUSED_ARG(tab);
1225 if (PerlIOValid(f)) {
1230 * Strip all layers that are not suitable for a raw stream
1233 while (t && (l = *t)) {
1234 if (l->tab->Binmode) {
1235 /* Has a handler - normal case */
1236 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1238 /* Layer still there - move down a layer */
1247 /* No handler - pop it */
1248 PerlIO_pop(aTHX_ t);
1251 if (PerlIOValid(f)) {
1252 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1260 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1261 PerlIO_list_t *layers, IV n, IV max)
1265 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1267 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1278 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1282 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1283 code = PerlIO_parse_layers(aTHX_ layers, names);
1285 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1287 PerlIO_list_free(aTHX_ layers);
1293 /*--------------------------------------------------------------------------------------*/
1295 * Given the abstraction above the public API functions
1299 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1301 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1302 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1303 (names) ? names : "(Null)");
1305 /* Do not flush etc. if (e.g.) switching encodings.
1306 if a pushed layer knows it needs to flush lower layers
1307 (for example :unix which is never going to call them)
1308 it can do the flush when it is pushed.
1310 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1313 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1314 #ifdef PERLIO_USING_CRLF
1315 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1316 O_BINARY so we can look for it in mode.
1318 if (!(mode & O_BINARY)) {
1320 /* FIXME?: Looking down the layer stack seems wrong,
1321 but is a way of reaching past (say) an encoding layer
1322 to flip CRLF-ness of the layer(s) below
1325 /* Perhaps we should turn on bottom-most aware layer
1326 e.g. Ilya's idea that UNIX TTY could serve
1328 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1329 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1330 /* Not in text mode - flush any pending stuff and flip it */
1332 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1334 /* Only need to turn it on in one layer so we are done */
1339 /* Not finding a CRLF aware layer presumably means we are binary
1340 which is not what was requested - so we failed
1341 We _could_ push :crlf layer but so could caller
1346 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1347 So code that used to be here is now in PerlIORaw_pushed().
1349 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), Nullch, Nullsv) ? TRUE : FALSE;
1354 PerlIO__close(pTHX_ PerlIO *f)
1356 if (PerlIOValid(f)) {
1357 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1358 if (tab && tab->Close)
1359 return (*tab->Close)(aTHX_ f);
1361 return PerlIOBase_close(aTHX_ f);
1364 SETERRNO(EBADF, SS_IVCHAN);
1370 Perl_PerlIO_close(pTHX_ PerlIO *f)
1372 const int code = PerlIO__close(aTHX_ f);
1373 while (PerlIOValid(f)) {
1374 PerlIO_pop(aTHX_ f);
1380 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1382 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1386 PerlIO_context_layers(pTHX_ const char *mode)
1388 const char *type = NULL;
1390 * Need to supply default layer info from open.pm
1393 SV *layers = PL_curcop->cop_io;
1396 type = SvPV_const(layers, len);
1397 if (type && mode[0] != 'r') {
1399 * Skip to write part
1401 const char *s = strchr(type, 0);
1402 if (s && (STRLEN)(s - type) < len) {
1411 static PerlIO_funcs *
1412 PerlIO_layer_from_ref(pTHX_ SV *sv)
1415 * For any scalar type load the handler which is bundled with perl
1417 if (SvTYPE(sv) < SVt_PVAV)
1418 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1421 * For other types allow if layer is known but don't try and load it
1423 switch (SvTYPE(sv)) {
1425 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1427 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1429 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1431 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1437 PerlIO_resolve_layers(pTHX_ const char *layers,
1438 const char *mode, int narg, SV **args)
1440 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1443 PerlIO_stdstreams(aTHX);
1447 * If it is a reference but not an object see if we have a handler
1450 if (SvROK(arg) && !sv_isobject(arg)) {
1451 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1453 def = PerlIO_list_alloc(aTHX);
1454 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1458 * Don't fail if handler cannot be found :via(...) etc. may do
1459 * something sensible else we will just stringfy and open
1465 layers = PerlIO_context_layers(aTHX_ mode);
1466 if (layers && *layers) {
1470 av = PerlIO_list_alloc(aTHX);
1471 for (i = 0; i < def->cur; i++) {
1472 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1479 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1483 PerlIO_list_free(aTHX_ av);
1484 return (PerlIO_list_t *) NULL;
1495 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1496 int imode, int perm, PerlIO *f, int narg, SV **args)
1498 if (!f && narg == 1 && *args == &PL_sv_undef) {
1499 if ((f = PerlIO_tmpfile())) {
1501 layers = PerlIO_context_layers(aTHX_ mode);
1502 if (layers && *layers)
1503 PerlIO_apply_layers(aTHX_ f, mode, layers);
1507 PerlIO_list_t *layera;
1509 PerlIO_funcs *tab = NULL;
1510 if (PerlIOValid(f)) {
1512 * This is "reopen" - it is not tested as perl does not use it
1516 layera = PerlIO_list_alloc(aTHX);
1518 SV * const arg = (l->tab->Getarg)
1519 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1521 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1522 l = *PerlIONext(&l);
1526 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1532 * Start at "top" of layer stack
1534 n = layera->cur - 1;
1536 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1545 * Found that layer 'n' can do opens - call it
1547 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1548 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1550 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1551 tab->name, layers, mode, fd, imode, perm,
1552 (void*)f, narg, (void*)args);
1554 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1557 SETERRNO(EINVAL, LIB_INVARG);
1561 if (n + 1 < layera->cur) {
1563 * More layers above the one that we used to open -
1566 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1567 /* If pushing layers fails close the file */
1574 PerlIO_list_free(aTHX_ layera);
1581 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1583 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1587 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1589 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1593 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1595 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1599 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1601 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1605 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1607 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1611 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1615 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1617 if (tab && tab->Flush)
1618 return (*tab->Flush) (aTHX_ f);
1620 return 0; /* If no Flush defined, silently succeed. */
1623 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1624 SETERRNO(EBADF, SS_IVCHAN);
1630 * Is it good API design to do flush-all on NULL, a potentially
1631 * errorneous input? Maybe some magical value (PerlIO*
1632 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1633 * things on fflush(NULL), but should we be bound by their design
1636 PerlIO **table = &PL_perlio;
1638 while ((f = *table)) {
1640 table = (PerlIO **) (f++);
1641 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1642 if (*f && PerlIO_flush(f) != 0)
1652 PerlIOBase_flush_linebuf(pTHX)
1654 PerlIO **table = &PL_perlio;
1656 while ((f = *table)) {
1658 table = (PerlIO **) (f++);
1659 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1662 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1663 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1671 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1673 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1677 PerlIO_isutf8(PerlIO *f)
1680 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1682 SETERRNO(EBADF, SS_IVCHAN);
1688 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1690 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1694 Perl_PerlIO_error(pTHX_ PerlIO *f)
1696 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1700 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1702 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1706 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1712 PerlIO_has_base(PerlIO *f)
1714 if (PerlIOValid(f)) {
1715 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1718 return (tab->Get_base != NULL);
1719 SETERRNO(EINVAL, LIB_INVARG);
1722 SETERRNO(EBADF, SS_IVCHAN);
1728 PerlIO_fast_gets(PerlIO *f)
1730 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1731 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1734 return (tab->Set_ptrcnt != NULL);
1735 SETERRNO(EINVAL, LIB_INVARG);
1738 SETERRNO(EBADF, SS_IVCHAN);
1744 PerlIO_has_cntptr(PerlIO *f)
1746 if (PerlIOValid(f)) {
1747 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1750 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1751 SETERRNO(EINVAL, LIB_INVARG);
1754 SETERRNO(EBADF, SS_IVCHAN);
1760 PerlIO_canset_cnt(PerlIO *f)
1762 if (PerlIOValid(f)) {
1763 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1766 return (tab->Set_ptrcnt != NULL);
1767 SETERRNO(EINVAL, LIB_INVARG);
1770 SETERRNO(EBADF, SS_IVCHAN);
1776 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1778 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1782 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1784 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1788 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1790 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1794 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1796 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1800 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1802 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1806 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1808 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1812 /*--------------------------------------------------------------------------------------*/
1814 * utf8 and raw dummy layers
1818 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1820 PERL_UNUSED_ARG(mode);
1821 PERL_UNUSED_ARG(arg);
1822 if (PerlIOValid(f)) {
1823 if (tab->kind & PERLIO_K_UTF8)
1824 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1826 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1832 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1833 sizeof(PerlIO_funcs),
1836 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1856 NULL, /* get_base */
1857 NULL, /* get_bufsiz */
1860 NULL, /* set_ptrcnt */
1863 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1864 sizeof(PerlIO_funcs),
1887 NULL, /* get_base */
1888 NULL, /* get_bufsiz */
1891 NULL, /* set_ptrcnt */
1895 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1896 IV n, const char *mode, int fd, int imode, int perm,
1897 PerlIO *old, int narg, SV **args)
1899 PerlIO_funcs * const tab = PerlIO_default_btm();
1900 PERL_UNUSED_ARG(self);
1901 if (tab && tab->Open)
1902 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1904 SETERRNO(EINVAL, LIB_INVARG);
1908 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1909 sizeof(PerlIO_funcs),
1932 NULL, /* get_base */
1933 NULL, /* get_bufsiz */
1936 NULL, /* set_ptrcnt */
1938 /*--------------------------------------------------------------------------------------*/
1939 /*--------------------------------------------------------------------------------------*/
1941 * "Methods" of the "base class"
1945 PerlIOBase_fileno(pTHX_ PerlIO *f)
1947 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1951 PerlIO_modestr(PerlIO * f, char *buf)
1954 if (PerlIOValid(f)) {
1955 const IV flags = PerlIOBase(f)->flags;
1956 if (flags & PERLIO_F_APPEND) {
1958 if (flags & PERLIO_F_CANREAD) {
1962 else if (flags & PERLIO_F_CANREAD) {
1964 if (flags & PERLIO_F_CANWRITE)
1967 else if (flags & PERLIO_F_CANWRITE) {
1969 if (flags & PERLIO_F_CANREAD) {
1973 #ifdef PERLIO_USING_CRLF
1974 if (!(flags & PERLIO_F_CRLF))
1984 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1986 PerlIOl * const l = PerlIOBase(f);
1987 PERL_UNUSED_ARG(arg);
1989 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1990 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1991 if (tab->Set_ptrcnt != NULL)
1992 l->flags |= PERLIO_F_FASTGETS;
1994 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
1998 l->flags |= PERLIO_F_CANREAD;
2001 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2004 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2007 SETERRNO(EINVAL, LIB_INVARG);
2013 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2016 l->flags &= ~PERLIO_F_CRLF;
2019 l->flags |= PERLIO_F_CRLF;
2022 SETERRNO(EINVAL, LIB_INVARG);
2029 l->flags |= l->next->flags &
2030 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2035 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2036 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2037 l->flags, PerlIO_modestr(f, temp));
2043 PerlIOBase_popped(pTHX_ PerlIO *f)
2050 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2053 * Save the position as current head considers it
2055 const Off_t old = PerlIO_tell(f);
2056 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", Nullsv);
2057 PerlIOSelf(f, PerlIOBuf)->posn = old;
2058 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2062 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2064 STDCHAR *buf = (STDCHAR *) vbuf;
2066 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2067 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2068 SETERRNO(EBADF, SS_IVCHAN);
2074 SSize_t avail = PerlIO_get_cnt(f);
2077 take = ((SSize_t)count < avail) ? count : avail;
2079 STDCHAR *ptr = PerlIO_get_ptr(f);
2080 Copy(ptr, buf, take, STDCHAR);
2081 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2084 if (avail == 0) /* set_ptrcnt could have reset avail */
2087 if (count > 0 && avail <= 0) {
2088 if (PerlIO_fill(f) != 0)
2093 return (buf - (STDCHAR *) vbuf);
2099 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2106 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2113 PerlIOBase_close(pTHX_ PerlIO *f)
2116 if (PerlIOValid(f)) {
2117 PerlIO *n = PerlIONext(f);
2118 code = PerlIO_flush(f);
2119 PerlIOBase(f)->flags &=
2120 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2121 while (PerlIOValid(n)) {
2122 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2123 if (tab && tab->Close) {
2124 if ((*tab->Close)(aTHX_ n) != 0)
2129 PerlIOBase(n)->flags &=
2130 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2136 SETERRNO(EBADF, SS_IVCHAN);
2142 PerlIOBase_eof(pTHX_ PerlIO *f)
2144 if (PerlIOValid(f)) {
2145 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2151 PerlIOBase_error(pTHX_ PerlIO *f)
2153 if (PerlIOValid(f)) {
2154 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2160 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2162 if (PerlIOValid(f)) {
2163 PerlIO *n = PerlIONext(f);
2164 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2171 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2173 if (PerlIOValid(f)) {
2174 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2179 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2185 return sv_dup(arg, param);
2188 return newSVsv(arg);
2191 PERL_UNUSED_ARG(param);
2192 return newSVsv(arg);
2197 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2199 PerlIO * const nexto = PerlIONext(o);
2200 if (PerlIOValid(nexto)) {
2201 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2202 if (tab && tab->Dup)
2203 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2205 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2208 PerlIO_funcs *self = PerlIOBase(o)->tab;
2211 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2212 self->name, (void*)f, (void*)o, (void*)param);
2214 arg = (*self->Getarg)(aTHX_ o, param, flags);
2218 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2227 perl_mutex PerlIO_mutex;
2230 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2235 /* Place holder for stdstreams call ??? */
2237 MUTEX_INIT(&PerlIO_mutex);
2242 PerlIOUnix_refcnt_inc(int fd)
2245 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2247 MUTEX_LOCK(&PerlIO_mutex);
2249 PL_perlio_fd_refcnt[fd]++;
2250 PerlIO_debug("fd %d refcnt=%d\n",fd,PL_perlio_fd_refcnt[fd]);
2252 MUTEX_UNLOCK(&PerlIO_mutex);
2258 PerlIOUnix_refcnt_dec(int fd)
2262 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2264 MUTEX_LOCK(&PerlIO_mutex);
2266 cnt = --PL_perlio_fd_refcnt[fd];
2267 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2269 MUTEX_UNLOCK(&PerlIO_mutex);
2276 PerlIO_cleanup(pTHX)
2280 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2282 PerlIO_debug("Cleanup layers\n");
2284 /* Raise STDIN..STDERR refcount so we don't close them */
2285 for (i=0; i < 3; i++)
2286 PerlIOUnix_refcnt_inc(i);
2287 PerlIO_cleantable(aTHX_ &PL_perlio);
2288 /* Restore STDIN..STDERR refcount */
2289 for (i=0; i < 3; i++)
2290 PerlIOUnix_refcnt_dec(i);
2292 if (PL_known_layers) {
2293 PerlIO_list_free(aTHX_ PL_known_layers);
2294 PL_known_layers = NULL;
2296 if (PL_def_layerlist) {
2297 PerlIO_list_free(aTHX_ PL_def_layerlist);
2298 PL_def_layerlist = NULL;
2304 /*--------------------------------------------------------------------------------------*/
2306 * Bottom-most level for UNIX-like case
2310 struct _PerlIO base; /* The generic part */
2311 int fd; /* UNIX like file descriptor */
2312 int oflags; /* open/fcntl flags */
2316 PerlIOUnix_oflags(const char *mode)
2319 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2324 if (*++mode == '+') {
2331 oflags = O_CREAT | O_TRUNC;
2332 if (*++mode == '+') {
2341 oflags = O_CREAT | O_APPEND;
2342 if (*++mode == '+') {
2355 else if (*mode == 't') {
2357 oflags &= ~O_BINARY;
2361 * Always open in binary mode
2364 if (*mode || oflags == -1) {
2365 SETERRNO(EINVAL, LIB_INVARG);
2372 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2374 return PerlIOSelf(f, PerlIOUnix)->fd;
2378 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2380 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2383 if (PerlLIO_fstat(fd, &st) == 0) {
2384 if (!S_ISREG(st.st_mode)) {
2385 PerlIO_debug("%d is not regular file\n",fd);
2386 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2389 PerlIO_debug("%d _is_ a regular file\n",fd);
2395 PerlIOUnix_refcnt_inc(fd);
2399 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2401 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2402 if (*PerlIONext(f)) {
2403 /* We never call down so do any pending stuff now */
2404 PerlIO_flush(PerlIONext(f));
2406 * XXX could (or should) we retrieve the oflags from the open file
2407 * handle rather than believing the "mode" we are passed in? XXX
2408 * Should the value on NULL mode be 0 or -1?
2410 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2411 mode ? PerlIOUnix_oflags(mode) : -1);
2413 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2419 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2421 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2423 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2425 SETERRNO(ESPIPE, LIB_INVARG);
2427 SETERRNO(EINVAL, LIB_INVARG);
2431 new_loc = PerlLIO_lseek(fd, offset, whence);
2432 if (new_loc == (Off_t) - 1)
2436 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2441 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2442 IV n, const char *mode, int fd, int imode,
2443 int perm, PerlIO *f, int narg, SV **args)
2445 if (PerlIOValid(f)) {
2446 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2447 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2450 if (*mode == IoTYPE_NUMERIC)
2453 imode = PerlIOUnix_oflags(mode);
2457 const char *path = SvPV_nolen_const(*args);
2458 fd = PerlLIO_open3(path, imode, perm);
2462 if (*mode == IoTYPE_IMPLICIT)
2465 f = PerlIO_allocate(aTHX);
2467 if (!PerlIOValid(f)) {
2468 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2472 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2473 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2474 if (*mode == IoTYPE_APPEND)
2475 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2481 * FIXME: pop layers ???
2489 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2491 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2493 if (flags & PERLIO_DUP_FD) {
2494 fd = PerlLIO_dup(fd);
2496 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2497 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2499 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2500 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2509 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2511 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2512 #ifdef PERLIO_STD_SPECIAL
2514 return PERLIO_STD_IN(fd, vbuf, count);
2516 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2517 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2521 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2522 if (len >= 0 || errno != EINTR) {
2524 if (errno != EAGAIN) {
2525 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2528 else if (len == 0 && count != 0) {
2529 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2540 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2542 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2543 #ifdef PERLIO_STD_SPECIAL
2544 if (fd == 1 || fd == 2)
2545 return PERLIO_STD_OUT(fd, vbuf, count);
2548 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2549 if (len >= 0 || errno != EINTR) {
2551 if (errno != EAGAIN) {
2552 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2563 PerlIOUnix_tell(pTHX_ PerlIO *f)
2565 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2570 PerlIOUnix_close(pTHX_ PerlIO *f)
2572 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2574 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2575 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2576 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2581 SETERRNO(EBADF,SS_IVCHAN);
2584 while (PerlLIO_close(fd) != 0) {
2585 if (errno != EINTR) {
2592 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2597 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2598 sizeof(PerlIO_funcs),
2605 PerlIOBase_binmode, /* binmode */
2615 PerlIOBase_noop_ok, /* flush */
2616 PerlIOBase_noop_fail, /* fill */
2619 PerlIOBase_clearerr,
2620 PerlIOBase_setlinebuf,
2621 NULL, /* get_base */
2622 NULL, /* get_bufsiz */
2625 NULL, /* set_ptrcnt */
2628 /*--------------------------------------------------------------------------------------*/
2633 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2634 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2635 broken by the last second glibc 2.3 fix
2637 #define STDIO_BUFFER_WRITABLE
2642 struct _PerlIO base;
2643 FILE *stdio; /* The stream */
2647 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2650 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2651 return PerlSIO_fileno(s);
2658 PerlIOStdio_mode(const char *mode, char *tmode)
2660 char * const ret = tmode;
2666 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2674 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2677 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2678 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2679 if (toptab == tab) {
2680 /* Top is already stdio - pop self (duplicate) and use original */
2681 PerlIO_pop(aTHX_ f);
2684 const int fd = PerlIO_fileno(n);
2687 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2688 mode = PerlIOStdio_mode(mode, tmode)))) {
2689 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2690 /* We never call down so do any pending stuff now */
2691 PerlIO_flush(PerlIONext(f));
2698 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2703 PerlIO_importFILE(FILE *stdio, const char *mode)
2709 if (!mode || !*mode) {
2710 /* We need to probe to see how we can open the stream
2711 so start with read/write and then try write and read
2712 we dup() so that we can fclose without loosing the fd.
2714 Note that the errno value set by a failing fdopen
2715 varies between stdio implementations.
2717 const int fd = PerlLIO_dup(fileno(stdio));
2718 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2720 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2723 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2726 /* Don't seem to be able to open */
2732 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, Nullsv))) {
2733 s = PerlIOSelf(f, PerlIOStdio);
2741 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2742 IV n, const char *mode, int fd, int imode,
2743 int perm, PerlIO *f, int narg, SV **args)
2746 if (PerlIOValid(f)) {
2747 const char *path = SvPV_nolen_const(*args);
2748 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2750 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2751 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2756 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2761 const char *path = SvPV_nolen_const(*args);
2762 if (*mode == IoTYPE_NUMERIC) {
2764 fd = PerlLIO_open3(path, imode, perm);
2768 bool appended = FALSE;
2770 /* Cygwin wants its 'b' early. */
2772 mode = PerlIOStdio_mode(mode, tmode);
2774 stdio = PerlSIO_fopen(path, mode);
2778 f = PerlIO_allocate(aTHX);
2781 mode = PerlIOStdio_mode(mode, tmode);
2782 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2784 s = PerlIOSelf(f, PerlIOStdio);
2786 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2798 if (*mode == IoTYPE_IMPLICIT) {
2805 stdio = PerlSIO_stdin;
2808 stdio = PerlSIO_stdout;
2811 stdio = PerlSIO_stderr;
2816 stdio = PerlSIO_fdopen(fd, mode =
2817 PerlIOStdio_mode(mode, tmode));
2821 f = PerlIO_allocate(aTHX);
2823 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2824 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2826 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2836 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2838 /* This assumes no layers underneath - which is what
2839 happens, but is not how I remember it. NI-S 2001/10/16
2841 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2842 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2843 const int fd = fileno(stdio);
2845 if (flags & PERLIO_DUP_FD) {
2846 const int dfd = PerlLIO_dup(fileno(stdio));
2848 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2852 /* FIXME: To avoid messy error recovery if dup fails
2853 re-use the existing stdio as though flag was not set
2857 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2859 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2860 PerlIOUnix_refcnt_inc(fileno(stdio));
2866 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2868 /* XXX this could use PerlIO_canset_fileno() and
2869 * PerlIO_set_fileno() support from Configure
2871 # if defined(__UCLIBC__)
2872 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
2875 # elif defined(__GLIBC__)
2876 /* There may be a better way for GLIBC:
2877 - libio.h defines a flag to not close() on cleanup
2881 # elif defined(__sun__)
2883 /* On solaris, if _LP64 is defined, the FILE structure is this:
2889 * It turns out that the fd is stored in the top 32 bits of
2890 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2891 * to contain a pointer or offset into another structure. All the
2892 * remaining fields are zero.
2894 * We set the top bits to -1 (0xFFFFFFFF).
2896 f->__pad[4] |= 0xffffffff00000000L;
2897 assert(fileno(f) == 0xffffffff);
2898 # else /* !defined(_LP64) */
2899 /* _file is just a unsigned char :-(
2900 Not clear why we dup() rather than using -1
2901 even if that would be treated as 0xFF - so will
2904 f->_file = PerlLIO_dup(fileno(f));
2905 # endif /* defined(_LP64) */
2907 # elif defined(__hpux)
2911 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2912 your platform does not have special entry try this one.
2913 [For OSF only have confirmation for Tru64 (alpha)
2914 but assume other OSFs will be similar.]
2916 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2919 # elif defined(__FreeBSD__)
2920 /* There may be a better way on FreeBSD:
2921 - we could insert a dummy func in the _close function entry
2922 f->_close = (int (*)(void *)) dummy_close;
2926 # elif defined(__OpenBSD__)
2927 /* There may be a better way on OpenBSD:
2928 - we could insert a dummy func in the _close function entry
2929 f->_close = (int (*)(void *)) dummy_close;
2933 # elif defined(__EMX__)
2934 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
2937 # elif defined(__CYGWIN__)
2938 /* There may be a better way on CYGWIN:
2939 - we could insert a dummy func in the _close function entry
2940 f->_close = (int (*)(void *)) dummy_close;
2944 # elif defined(WIN32)
2945 # if defined(__BORLANDC__)
2946 f->fd = PerlLIO_dup(fileno(f));
2947 # elif defined(UNDER_CE)
2948 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2957 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2958 (which isn't thread safe) instead
2960 # error "Don't know how to set FILE.fileno on your platform"
2968 PerlIOStdio_close(pTHX_ PerlIO *f)
2970 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2976 const int fd = fileno(stdio);
2982 #ifdef SOCKS5_VERSION_NAME
2983 /* Socks lib overrides close() but stdio isn't linked to
2984 that library (though we are) - so we must call close()
2985 on sockets on stdio's behalf.
2988 Sock_size_t optlen = sizeof(int);
2989 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2994 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2995 /* File descriptor still in use */
3000 /* For STD* handles don't close the stdio at all
3001 this is because we have shared the FILE * too
3003 if (stdio == stdin) {
3004 /* Some stdios are buggy fflush-ing inputs */
3007 else if (stdio == stdout || stdio == stderr) {
3008 return PerlIO_flush(f);
3010 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3011 Use Sarathy's trick from maint-5.6 to invalidate the
3012 fileno slot of the FILE *
3014 result = PerlIO_flush(f);
3016 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
3017 dupfd = PerlLIO_dup(fd);
3020 result = PerlSIO_fclose(stdio);
3021 /* We treat error from stdio as success if we invalidated
3022 errno may NOT be expected EBADF
3024 if (invalidate && result != 0) {
3029 /* in SOCKS case let close() determine return value */
3033 PerlLIO_dup2(dupfd,fd);
3034 PerlLIO_close(dupfd);
3041 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3043 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3047 STDCHAR *buf = (STDCHAR *) vbuf;
3049 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3050 * stdio does not do that for fread()
3052 const int ch = PerlSIO_fgetc(s);
3059 got = PerlSIO_fread(vbuf, 1, count, s);
3060 if (got == 0 && PerlSIO_ferror(s))
3062 if (got >= 0 || errno != EINTR)
3065 SETERRNO(0,0); /* just in case */
3071 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3074 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3076 #ifdef STDIO_BUFFER_WRITABLE
3077 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3078 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3079 STDCHAR *base = PerlIO_get_base(f);
3080 SSize_t cnt = PerlIO_get_cnt(f);
3081 STDCHAR *ptr = PerlIO_get_ptr(f);
3082 SSize_t avail = ptr - base;
3084 if (avail > count) {
3088 Move(buf-avail,ptr,avail,STDCHAR);
3091 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3092 if (PerlSIO_feof(s) && unread >= 0)
3093 PerlSIO_clearerr(s);
3098 if (PerlIO_has_cntptr(f)) {
3099 /* We can get pointer to buffer but not its base
3100 Do ungetc() but check chars are ending up in the
3103 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3104 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3106 const int ch = *--buf & 0xFF;
3107 if (ungetc(ch,s) != ch) {
3108 /* ungetc did not work */
3111 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3112 /* Did not change pointer as expected */
3113 fgetc(s); /* get char back again */
3123 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3129 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3133 got = PerlSIO_fwrite(vbuf, 1, count,
3134 PerlIOSelf(f, PerlIOStdio)->stdio);
3135 if (got >= 0 || errno != EINTR)
3138 SETERRNO(0,0); /* just in case */
3144 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3146 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3147 return PerlSIO_fseek(stdio, offset, whence);
3151 PerlIOStdio_tell(pTHX_ PerlIO *f)
3153 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3154 return PerlSIO_ftell(stdio);
3158 PerlIOStdio_flush(pTHX_ PerlIO *f)
3160 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3161 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3162 return PerlSIO_fflush(stdio);
3167 * FIXME: This discards ungetc() and pre-read stuff which is not
3168 * right if this is just a "sync" from a layer above Suspect right
3169 * design is to do _this_ but not have layer above flush this
3170 * layer read-to-read
3173 * Not writeable - sync by attempting a seek
3176 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3184 PerlIOStdio_eof(pTHX_ PerlIO *f)
3186 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3190 PerlIOStdio_error(pTHX_ PerlIO *f)
3192 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3196 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3198 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3202 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3204 #ifdef HAS_SETLINEBUF
3205 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3207 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3213 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3215 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3216 return (STDCHAR*)PerlSIO_get_base(stdio);
3220 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3222 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3223 return PerlSIO_get_bufsiz(stdio);
3227 #ifdef USE_STDIO_PTR
3229 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3231 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3232 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3236 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3238 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3239 return PerlSIO_get_cnt(stdio);
3243 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3245 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3247 #ifdef STDIO_PTR_LVALUE
3248 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3249 #ifdef STDIO_PTR_LVAL_SETS_CNT
3250 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3251 assert(PerlSIO_get_cnt(stdio) == (cnt));
3254 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3256 * Setting ptr _does_ change cnt - we are done
3260 #else /* STDIO_PTR_LVALUE */
3262 #endif /* STDIO_PTR_LVALUE */
3265 * Now (or only) set cnt
3267 #ifdef STDIO_CNT_LVALUE
3268 PerlSIO_set_cnt(stdio, cnt);
3269 #else /* STDIO_CNT_LVALUE */
3270 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3271 PerlSIO_set_ptr(stdio,
3272 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3274 #else /* STDIO_PTR_LVAL_SETS_CNT */
3276 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3277 #endif /* STDIO_CNT_LVALUE */
3284 PerlIOStdio_fill(pTHX_ PerlIO *f)
3286 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3289 * fflush()ing read-only streams can cause trouble on some stdio-s
3291 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3292 if (PerlSIO_fflush(stdio) != 0)
3295 c = PerlSIO_fgetc(stdio);
3299 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3301 #ifdef STDIO_BUFFER_WRITABLE
3302 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3303 /* Fake ungetc() to the real buffer in case system's ungetc
3306 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3307 SSize_t cnt = PerlSIO_get_cnt(stdio);
3308 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3309 if (ptr == base+1) {
3310 *--ptr = (STDCHAR) c;
3311 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3312 if (PerlSIO_feof(stdio))
3313 PerlSIO_clearerr(stdio);
3319 if (PerlIO_has_cntptr(f)) {
3321 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3328 /* An ungetc()d char is handled separately from the regular
3329 * buffer, so we stuff it in the buffer ourselves.
3330 * Should never get called as should hit code above
3332 *(--((*stdio)->_ptr)) = (unsigned char) c;
3335 /* If buffer snoop scheme above fails fall back to
3338 if (PerlSIO_ungetc(c, stdio) != c)
3346 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3347 sizeof(PerlIO_funcs),
3349 sizeof(PerlIOStdio),
3350 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3354 PerlIOBase_binmode, /* binmode */
3368 PerlIOStdio_clearerr,
3369 PerlIOStdio_setlinebuf,
3371 PerlIOStdio_get_base,
3372 PerlIOStdio_get_bufsiz,
3377 #ifdef USE_STDIO_PTR
3378 PerlIOStdio_get_ptr,
3379 PerlIOStdio_get_cnt,
3380 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3381 PerlIOStdio_set_ptrcnt,
3384 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3389 #endif /* USE_STDIO_PTR */
3392 /* Note that calls to PerlIO_exportFILE() are reversed using
3393 * PerlIO_releaseFILE(), not importFILE. */
3395 PerlIO_exportFILE(PerlIO * f, const char *mode)
3399 if (PerlIOValid(f)) {
3402 if (!mode || !*mode) {
3403 mode = PerlIO_modestr(f, buf);
3405 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3409 /* De-link any lower layers so new :stdio sticks */
3411 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, Nullsv))) {
3412 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3414 /* Link previous lower layers under new one */
3418 /* restore layers list */
3428 PerlIO_findFILE(PerlIO *f)
3432 if (l->tab == &PerlIO_stdio) {
3433 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3436 l = *PerlIONext(&l);
3438 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3439 return PerlIO_exportFILE(f, Nullch);
3442 /* Use this to reverse PerlIO_exportFILE calls. */
3444 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3449 if (l->tab == &PerlIO_stdio) {
3450 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3451 if (s->stdio == f) {
3453 PerlIO_pop(aTHX_ p);
3462 /*--------------------------------------------------------------------------------------*/
3464 * perlio buffer layer
3468 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3470 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3471 const int fd = PerlIO_fileno(f);
3472 if (fd >= 0 && PerlLIO_isatty(fd)) {
3473 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3475 if (*PerlIONext(f)) {
3476 const Off_t posn = PerlIO_tell(PerlIONext(f));
3477 if (posn != (Off_t) - 1) {
3481 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3485 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3486 IV n, const char *mode, int fd, int imode, int perm,
3487 PerlIO *f, int narg, SV **args)
3489 if (PerlIOValid(f)) {
3490 PerlIO *next = PerlIONext(f);
3492 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3493 if (tab && tab->Open)
3495 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3497 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3502 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3504 if (*mode == IoTYPE_IMPLICIT) {
3510 if (tab && tab->Open)
3511 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3514 SETERRNO(EINVAL, LIB_INVARG);
3516 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3518 * if push fails during open, open fails. close will pop us.
3523 fd = PerlIO_fileno(f);
3524 if (init && fd == 2) {
3526 * Initial stderr is unbuffered
3528 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3530 #ifdef PERLIO_USING_CRLF
3531 # ifdef PERLIO_IS_BINMODE_FD
3532 if (PERLIO_IS_BINMODE_FD(fd))
3533 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3537 * do something about failing setmode()? --jhi
3539 PerlLIO_setmode(fd, O_BINARY);
3548 * This "flush" is akin to sfio's sync in that it handles files in either
3549 * read or write state. For write state, we put the postponed data through
3550 * the next layers. For read state, we seek() the next layers to the
3551 * offset given by current position in the buffer, and discard the buffer
3552 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3553 * in any case?). Then the pass the stick further in chain.
3556 PerlIOBuf_flush(pTHX_ PerlIO *f)
3558 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3560 PerlIO *n = PerlIONext(f);
3561 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3563 * write() the buffer
3565 const STDCHAR *buf = b->buf;
3566 const STDCHAR *p = buf;
3567 while (p < b->ptr) {
3568 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3572 else if (count < 0 || PerlIO_error(n)) {
3573 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3578 b->posn += (p - buf);
3580 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3581 STDCHAR *buf = PerlIO_get_base(f);
3583 * Note position change
3585 b->posn += (b->ptr - buf);
3586 if (b->ptr < b->end) {
3587 /* We did not consume all of it - try and seek downstream to
3588 our logical position
3590 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3591 /* Reload n as some layers may pop themselves on seek */
3592 b->posn = PerlIO_tell(n = PerlIONext(f));
3595 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3596 data is lost for good - so return saying "ok" having undone
3599 b->posn -= (b->ptr - buf);
3604 b->ptr = b->end = b->buf;
3605 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3606 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3607 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3612 /* This discards the content of the buffer after b->ptr, and rereads
3613 * the buffer from the position off in the layer downstream; here off
3614 * is at offset corresponding to b->ptr - b->buf.
3617 PerlIOBuf_fill(pTHX_ PerlIO *f)
3619 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3620 PerlIO *n = PerlIONext(f);
3623 * Down-stream flush is defined not to loose read data so is harmless.
3624 * we would not normally be fill'ing if there was data left in anycase.
3626 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3628 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3629 PerlIOBase_flush_linebuf(aTHX);
3632 PerlIO_get_base(f); /* allocate via vtable */
3634 b->ptr = b->end = b->buf;
3636 if (!PerlIOValid(n)) {
3637 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3641 if (PerlIO_fast_gets(n)) {
3643 * Layer below is also buffered. We do _NOT_ want to call its
3644 * ->Read() because that will loop till it gets what we asked for
3645 * which may hang on a pipe etc. Instead take anything it has to
3646 * hand, or ask it to fill _once_.
3648 avail = PerlIO_get_cnt(n);
3650 avail = PerlIO_fill(n);
3652 avail = PerlIO_get_cnt(n);
3654 if (!PerlIO_error(n) && PerlIO_eof(n))
3659 STDCHAR *ptr = PerlIO_get_ptr(n);
3660 SSize_t cnt = avail;
3661 if (avail > (SSize_t)b->bufsiz)
3663 Copy(ptr, b->buf, avail, STDCHAR);
3664 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3668 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3672 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3674 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3677 b->end = b->buf + avail;
3678 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3683 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3685 if (PerlIOValid(f)) {
3686 const PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3689 return PerlIOBase_read(aTHX_ f, vbuf, count);
3695 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3697 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3698 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3701 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3706 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3708 * Buffer is already a read buffer, we can overwrite any chars
3709 * which have been read back to buffer start
3711 avail = (b->ptr - b->buf);
3715 * Buffer is idle, set it up so whole buffer is available for
3719 b->end = b->buf + avail;
3721 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3723 * Buffer extends _back_ from where we are now
3725 b->posn -= b->bufsiz;
3727 if (avail > (SSize_t) count) {
3729 * If we have space for more than count, just move count
3737 * In simple stdio-like ungetc() case chars will be already
3740 if (buf != b->ptr) {
3741 Copy(buf, b->ptr, avail, STDCHAR);
3745 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3749 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3755 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3757 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3758 const STDCHAR *buf = (const STDCHAR *) vbuf;
3759 const STDCHAR *flushptr = buf;
3763 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3765 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3766 if (PerlIO_flush(f) != 0) {
3770 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3771 flushptr = buf + count;
3772 while (flushptr > buf && *(flushptr - 1) != '\n')
3776 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3777 if ((SSize_t) count < avail)
3779 if (flushptr > buf && flushptr <= buf + avail)
3780 avail = flushptr - buf;
3781 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3783 Copy(buf, b->ptr, avail, STDCHAR);
3788 if (buf == flushptr)
3791 if (b->ptr >= (b->buf + b->bufsiz))
3794 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3800 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3803 if ((code = PerlIO_flush(f)) == 0) {
3804 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3805 code = PerlIO_seek(PerlIONext(f), offset, whence);
3807 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3808 b->posn = PerlIO_tell(PerlIONext(f));
3815 PerlIOBuf_tell(pTHX_ PerlIO *f)
3817 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3819 * b->posn is file position where b->buf was read, or will be written
3821 Off_t posn = b->posn;
3822 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3823 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3825 /* As O_APPEND files are normally shared in some sense it is better
3830 /* when file is NOT shared then this is sufficient */
3831 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3833 posn = b->posn = PerlIO_tell(PerlIONext(f));
3837 * If buffer is valid adjust position by amount in buffer
3839 posn += (b->ptr - b->buf);
3845 PerlIOBuf_popped(pTHX_ PerlIO *f)
3847 const IV code = PerlIOBase_popped(aTHX_ f);
3848 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3849 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3853 b->ptr = b->end = b->buf;
3854 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3859 PerlIOBuf_close(pTHX_ PerlIO *f)
3861 const IV code = PerlIOBase_close(aTHX_ f);
3862 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3863 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3867 b->ptr = b->end = b->buf;
3868 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3873 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3875 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3882 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3884 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3887 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3888 return (b->end - b->ptr);
3893 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3895 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3899 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
3901 b->buf = (STDCHAR *) & b->oneword;
3902 b->bufsiz = sizeof(b->oneword);
3911 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3913 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3916 return (b->end - b->buf);
3920 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3922 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3926 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3927 assert(PerlIO_get_cnt(f) == cnt);
3928 assert(b->ptr >= b->buf);
3930 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3934 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3936 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3941 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
3942 sizeof(PerlIO_funcs),
3945 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3949 PerlIOBase_binmode, /* binmode */
3963 PerlIOBase_clearerr,
3964 PerlIOBase_setlinebuf,
3969 PerlIOBuf_set_ptrcnt,
3972 /*--------------------------------------------------------------------------------------*/
3974 * Temp layer to hold unread chars when cannot do it any other way
3978 PerlIOPending_fill(pTHX_ PerlIO *f)
3981 * Should never happen
3988 PerlIOPending_close(pTHX_ PerlIO *f)
3991 * A tad tricky - flush pops us, then we close new top
3994 return PerlIO_close(f);
3998 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4001 * A tad tricky - flush pops us, then we seek new top
4004 return PerlIO_seek(f, offset, whence);
4009 PerlIOPending_flush(pTHX_ PerlIO *f)
4011 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4012 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4016 PerlIO_pop(aTHX_ f);
4021 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4027 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4032 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4034 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4035 PerlIOl *l = PerlIOBase(f);
4037 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4038 * etc. get muddled when it changes mid-string when we auto-pop.
4040 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4041 (PerlIOBase(PerlIONext(f))->
4042 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4047 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4049 SSize_t avail = PerlIO_get_cnt(f);
4051 if ((SSize_t)count < avail)
4054 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4055 if (got >= 0 && got < (SSize_t)count) {
4056 const SSize_t more =
4057 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4058 if (more >= 0 || got == 0)
4064 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4065 sizeof(PerlIO_funcs),
4068 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4069 PerlIOPending_pushed,
4072 PerlIOBase_binmode, /* binmode */
4081 PerlIOPending_close,
4082 PerlIOPending_flush,
4086 PerlIOBase_clearerr,
4087 PerlIOBase_setlinebuf,
4092 PerlIOPending_set_ptrcnt,
4097 /*--------------------------------------------------------------------------------------*/
4099 * crlf - translation On read translate CR,LF to "\n" we do this by
4100 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4101 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4103 * c->nl points on the first byte of CR LF pair when it is temporarily
4104 * replaced by LF, or to the last CR of the buffer. In the former case
4105 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4106 * that it ends at c->nl; these two cases can be distinguished by
4107 * *c->nl. c->nl is set during _getcnt() call, and unset during
4108 * _unread() and _flush() calls.
4109 * It only matters for read operations.
4113 PerlIOBuf base; /* PerlIOBuf stuff */
4114 STDCHAR *nl; /* Position of crlf we "lied" about in the
4119 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4122 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4123 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4125 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4126 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4127 PerlIOBase(f)->flags);
4130 /* Enable the first CRLF capable layer you can find, but if none
4131 * found, the one we just pushed is fine. This results in at
4132 * any given moment at most one CRLF-capable layer being enabled
4133 * in the whole layer stack. */
4134 PerlIO *g = PerlIONext(f);
4136 PerlIOl *b = PerlIOBase(g);
4137 if (b && b->tab == &PerlIO_crlf) {
4138 if (!(b->flags & PERLIO_F_CRLF))
4139 b->flags |= PERLIO_F_CRLF;
4140 PerlIO_pop(aTHX_ f);
4151 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4153 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4154 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4158 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4159 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4161 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4162 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4164 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4169 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4170 b->end = b->ptr = b->buf + b->bufsiz;
4171 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4172 b->posn -= b->bufsiz;
4174 while (count > 0 && b->ptr > b->buf) {
4177 if (b->ptr - 2 >= b->buf) {
4184 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4185 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4201 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4203 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4205 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4208 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4209 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4210 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4211 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4213 while (nl < b->end && *nl != 0xd)
4215 if (nl < b->end && *nl == 0xd) {
4217 if (nl + 1 < b->end) {
4224 * Not CR,LF but just CR
4232 * Blast - found CR as last char in buffer
4237 * They may not care, defer work as long as
4241 return (nl - b->ptr);
4245 b->ptr++; /* say we have read it as far as
4246 * flush() is concerned */
4247 b->buf++; /* Leave space in front of buffer */
4248 /* Note as we have moved buf up flush's
4250 will naturally make posn point at CR
4252 b->bufsiz--; /* Buffer is thus smaller */
4253 code = PerlIO_fill(f); /* Fetch some more */
4254 b->bufsiz++; /* Restore size for next time */
4255 b->buf--; /* Point at space */
4256 b->ptr = nl = b->buf; /* Which is what we hand
4258 *nl = 0xd; /* Fill in the CR */
4260 goto test; /* fill() call worked */
4262 * CR at EOF - just fall through
4264 /* Should we clear EOF though ??? */
4269 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4275 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4277 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4278 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4284 if (ptr == b->end && *c->nl == 0xd) {
4285 /* Defered CR at end of buffer case - we lied about count */
4297 * Test code - delete when it works ...
4299 IV flags = PerlIOBase(f)->flags;
4300 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4301 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4302 /* Defered CR at end of buffer case - we lied about count */
4308 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4309 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4317 * They have taken what we lied about
4325 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4329 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4331 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4332 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4334 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4335 const STDCHAR *buf = (const STDCHAR *) vbuf;
4336 const STDCHAR *ebuf = buf + count;
4339 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4341 while (buf < ebuf) {
4342 STDCHAR *eptr = b->buf + b->bufsiz;
4343 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4344 while (buf < ebuf && b->ptr < eptr) {
4346 if ((b->ptr + 2) > eptr) {
4354 *(b->ptr)++ = 0xd; /* CR */
4355 *(b->ptr)++ = 0xa; /* LF */
4357 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4367 if (b->ptr >= eptr) {
4373 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4375 return (buf - (STDCHAR *) vbuf);
4380 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4382 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4387 return PerlIOBuf_flush(aTHX_ f);
4391 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4393 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4394 /* In text mode - flush any pending stuff and flip it */
4395 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4396 #ifndef PERLIO_USING_CRLF
4397 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4398 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4399 PerlIO_pop(aTHX_ f);
4406 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4407 sizeof(PerlIO_funcs),
4410 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4412 PerlIOBuf_popped, /* popped */
4414 PerlIOCrlf_binmode, /* binmode */
4418 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4419 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4420 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4428 PerlIOBase_clearerr,
4429 PerlIOBase_setlinebuf,
4434 PerlIOCrlf_set_ptrcnt,
4438 /*--------------------------------------------------------------------------------------*/
4440 * mmap as "buffer" layer
4444 PerlIOBuf base; /* PerlIOBuf stuff */
4445 Mmap_t mptr; /* Mapped address */
4446 Size_t len; /* mapped length */
4447 STDCHAR *bbuf; /* malloced buffer if map fails */
4451 PerlIOMmap_map(pTHX_ PerlIO *f)
4454 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4455 const IV flags = PerlIOBase(f)->flags;
4459 if (flags & PERLIO_F_CANREAD) {
4460 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4461 const int fd = PerlIO_fileno(f);
4463 code = Fstat(fd, &st);
4464 if (code == 0 && S_ISREG(st.st_mode)) {
4465 SSize_t len = st.st_size - b->posn;
4468 if (PL_mmap_page_size <= 0)
4469 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4473 * This is a hack - should never happen - open should
4476 b->posn = PerlIO_tell(PerlIONext(f));
4478 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4479 len = st.st_size - posn;
4480 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4481 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4482 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4483 madvise(m->mptr, len, MADV_SEQUENTIAL);
4485 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4486 madvise(m->mptr, len, MADV_WILLNEED);
4488 PerlIOBase(f)->flags =
4489 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4490 b->end = ((STDCHAR *) m->mptr) + len;
4491 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4500 PerlIOBase(f)->flags =
4501 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4503 b->ptr = b->end = b->ptr;
4512 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4514 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4515 PerlIOBuf *b = &m->base;
4519 code = munmap(m->mptr, m->len);
4523 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4526 b->ptr = b->end = b->buf;
4527 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4533 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4535 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4536 PerlIOBuf *b = &m->base;
4537 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4539 * Already have a readbuffer in progress
4545 * We have a write buffer or flushed PerlIOBuf read buffer
4547 m->bbuf = b->buf; /* save it in case we need it again */
4548 b->buf = NULL; /* Clear to trigger below */
4551 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4554 * Map did not work - recover PerlIOBuf buffer if we have one
4559 b->ptr = b->end = b->buf;
4562 return PerlIOBuf_get_base(aTHX_ f);
4566 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4568 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4569 PerlIOBuf *b = &m->base;
4570 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4572 if (b->ptr && (b->ptr - count) >= b->buf
4573 && memEQ(b->ptr - count, vbuf, count)) {
4575 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4580 * Loose the unwritable mapped buffer
4584 * If flush took the "buffer" see if we have one from before
4586 if (!b->buf && m->bbuf)
4589 PerlIOBuf_get_base(aTHX_ f);
4593 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4597 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4599 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4600 PerlIOBuf * const b = &m->base;
4602 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4604 * No, or wrong sort of, buffer
4607 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4611 * If unmap took the "buffer" see if we have one from before
4613 if (!b->buf && m->bbuf)
4616 PerlIOBuf_get_base(aTHX_ f);
4620 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4624 PerlIOMmap_flush(pTHX_ PerlIO *f)
4626 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4627 PerlIOBuf *b = &m->base;
4628 IV code = PerlIOBuf_flush(aTHX_ f);
4630 * Now we are "synced" at PerlIOBuf level
4637 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4642 * We seem to have a PerlIOBuf buffer which was not mapped
4643 * remember it in case we need one later
4652 PerlIOMmap_fill(pTHX_ PerlIO *f)
4654 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4655 IV code = PerlIO_flush(f);
4656 if (code == 0 && !b->buf) {
4657 code = PerlIOMmap_map(aTHX_ f);
4659 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4660 code = PerlIOBuf_fill(aTHX_ f);
4666 PerlIOMmap_close(pTHX_ PerlIO *f)
4668 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4669 PerlIOBuf *b = &m->base;
4670 IV code = PerlIO_flush(f);
4674 b->ptr = b->end = b->buf;
4676 if (PerlIOBuf_close(aTHX_ f) != 0)
4682 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4684 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4688 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4689 sizeof(PerlIO_funcs),
4692 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4696 PerlIOBase_binmode, /* binmode */
4710 PerlIOBase_clearerr,
4711 PerlIOBase_setlinebuf,
4712 PerlIOMmap_get_base,
4716 PerlIOBuf_set_ptrcnt,
4719 #endif /* HAS_MMAP */
4722 Perl_PerlIO_stdin(pTHX)
4725 PerlIO_stdstreams(aTHX);
4727 return &PL_perlio[1];
4731 Perl_PerlIO_stdout(pTHX)
4734 PerlIO_stdstreams(aTHX);
4736 return &PL_perlio[2];
4740 Perl_PerlIO_stderr(pTHX)
4743 PerlIO_stdstreams(aTHX);
4745 return &PL_perlio[3];
4748 /*--------------------------------------------------------------------------------------*/
4751 PerlIO_getname(PerlIO *f, char *buf)
4756 bool exported = FALSE;
4757 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4759 stdio = PerlIO_exportFILE(f,0);
4763 name = fgetname(stdio, buf);
4764 if (exported) PerlIO_releaseFILE(f,stdio);
4769 PERL_UNUSED_ARG(buf);
4770 Perl_croak(aTHX_ "Don't know how to get file name");
4776 /*--------------------------------------------------------------------------------------*/
4778 * Functions which can be called on any kind of PerlIO implemented in
4782 #undef PerlIO_fdopen
4784 PerlIO_fdopen(int fd, const char *mode)
4787 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4792 PerlIO_open(const char *path, const char *mode)
4795 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4796 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4799 #undef Perlio_reopen
4801 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4804 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4805 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4810 PerlIO_getc(PerlIO *f)
4814 if ( 1 == PerlIO_read(f, buf, 1) ) {
4815 return (unsigned char) buf[0];
4820 #undef PerlIO_ungetc
4822 PerlIO_ungetc(PerlIO *f, int ch)
4827 if (PerlIO_unread(f, &buf, 1) == 1)
4835 PerlIO_putc(PerlIO *f, int ch)
4839 return PerlIO_write(f, &buf, 1);
4844 PerlIO_puts(PerlIO *f, const char *s)
4847 STRLEN len = strlen(s);
4848 return PerlIO_write(f, s, len);
4851 #undef PerlIO_rewind
4853 PerlIO_rewind(PerlIO *f)
4856 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4860 #undef PerlIO_vprintf
4862 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4865 SV *sv = newSVpvn("", 0);
4871 Perl_va_copy(ap, apc);
4872 sv_vcatpvf(sv, fmt, &apc);
4874 sv_vcatpvf(sv, fmt, &ap);
4876 s = SvPV_const(sv, len);
4877 wrote = PerlIO_write(f, s, len);
4882 #undef PerlIO_printf
4884 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4889 result = PerlIO_vprintf(f, fmt, ap);
4894 #undef PerlIO_stdoutf
4896 PerlIO_stdoutf(const char *fmt, ...)
4902 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4907 #undef PerlIO_tmpfile
4909 PerlIO_tmpfile(void)
4914 const int fd = win32_tmpfd();
4916 f = PerlIO_fdopen(fd, "w+b");
4918 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4919 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4921 * I have no idea how portable mkstemp() is ... NI-S
4923 const int fd = mkstemp(SvPVX(sv));
4925 f = PerlIO_fdopen(fd, "w+");
4927 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4928 PerlLIO_unlink(SvPVX_const(sv));
4931 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
4932 FILE *stdio = PerlSIO_tmpfile();
4935 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
4936 PERLIO_FUNCS_CAST(&PerlIO_stdio),
4938 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4944 # endif /* else HAS_MKSTEMP */
4945 #endif /* else WIN32 */
4952 #endif /* USE_SFIO */
4953 #endif /* PERLIO_IS_STDIO */
4955 /*======================================================================================*/
4957 * Now some functions in terms of above which may be needed even if we are
4958 * not in true PerlIO mode
4962 #undef PerlIO_setpos
4964 PerlIO_setpos(PerlIO *f, SV *pos)
4969 Off_t *posn = (Off_t *) SvPV(pos, len);
4970 if (f && len == sizeof(Off_t))
4971 return PerlIO_seek(f, *posn, SEEK_SET);
4973 SETERRNO(EINVAL, SS_IVCHAN);
4977 #undef PerlIO_setpos
4979 PerlIO_setpos(PerlIO *f, SV *pos)
4984 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4985 if (f && len == sizeof(Fpos_t)) {
4986 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4987 return fsetpos64(f, fpos);
4989 return fsetpos(f, fpos);
4993 SETERRNO(EINVAL, SS_IVCHAN);
4999 #undef PerlIO_getpos
5001 PerlIO_getpos(PerlIO *f, SV *pos)
5004 Off_t posn = PerlIO_tell(f);
5005 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5006 return (posn == (Off_t) - 1) ? -1 : 0;
5009 #undef PerlIO_getpos
5011 PerlIO_getpos(PerlIO *f, SV *pos)
5016 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5017 code = fgetpos64(f, &fpos);
5019 code = fgetpos(f, &fpos);
5021 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5026 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5029 vprintf(char *pat, char *args)
5031 _doprnt(pat, args, stdout);
5032 return 0; /* wrong, but perl doesn't use the return
5037 vfprintf(FILE *fd, char *pat, char *args)
5039 _doprnt(pat, args, fd);
5040 return 0; /* wrong, but perl doesn't use the return
5046 #ifndef PerlIO_vsprintf
5048 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5051 const int val = vsprintf(s, fmt, ap);
5053 if (strlen(s) >= (STRLEN) n) {
5055 (void) PerlIO_puts(Perl_error_log,
5056 "panic: sprintf overflow - memory corrupted!\n");
5064 #ifndef PerlIO_sprintf
5066 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5071 result = PerlIO_vsprintf(s, n, fmt, ap);
5079 * c-indentation-style: bsd
5081 * indent-tabs-mode: t
5084 * ex: set ts=8 sts=4 sw=4 noet: