2 * perlio.c Copyright (c) 1996-2002, 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.
13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14 * at the dispatch tables, even when we do not need it for other reasons.
15 * Invent a dSYS macro to abstract this out
17 #ifdef PERL_IMPLICIT_SYS
30 #define PERLIO_NOT_STDIO 0
31 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
37 * This file provides those parts of PerlIO abstraction
38 * which are not #defined in perlio.h.
39 * Which these are depends on various Configure #ifdef's
43 #define PERL_IN_PERLIO_C
46 #ifdef PERL_IMPLICIT_CONTEXT
54 perlsio_binmode(FILE *fp, int iotype, int mode)
57 * This used to be contents of do_binmode in doio.c
60 # if defined(atarist) || defined(__MINT__)
63 ((FILE *) fp)->_flag |= _IOBIN;
65 ((FILE *) fp)->_flag &= ~_IOBIN;
72 if (PerlLIO_setmode(fp, mode) != -1) {
74 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
76 # if defined(WIN32) && defined(__BORLANDC__)
78 * The translation mode of the stream is maintained independent of
79 * the translation mode of the fd in the Borland RTL (heavy
80 * digging through their runtime sources reveal). User has to set
81 * the mode explicitly for the stream (though they don't document
82 * this anywhere). GSAR 97-5-24
96 # if defined(USEMYBINMODE)
98 if (my_binmode(fp, iotype, mode) != FALSE)
109 #define O_ACCMODE 3 /* Assume traditional implementation */
113 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
115 int result = rawmode & O_ACCMODE;
120 ptype = IoTYPE_RDONLY;
123 ptype = IoTYPE_WRONLY;
131 *writing = (result != O_RDONLY);
133 if (result == O_RDONLY) {
137 else if (rawmode & O_APPEND) {
139 if (result != O_WRONLY)
144 if (result == O_WRONLY)
151 if (rawmode & O_BINARY)
157 #ifndef PERLIO_LAYERS
159 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
161 if (!names || !*names || strEQ(names, ":crlf") || strEQ(names, ":raw")) {
164 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
172 PerlIO_destruct(pTHX)
177 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
182 return perlsio_binmode(fp, iotype, mode);
187 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
191 int fd = PerlLIO_dup(PerlIO_fileno(f));
194 int omode = fcntl(fd, F_GETFL);
196 omode = djgpp_get_stream_mode(f);
198 PerlIO_intmode2str(omode,mode,NULL);
199 /* the r+ is a hack */
200 return PerlIO_fdopen(fd, mode);
205 SETERRNO(EBADF, SS$_IVCHAN);
213 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
217 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
218 int imode, int perm, PerlIO *old, int narg, SV **args)
222 Perl_croak(aTHX_ "More than one argument to open");
224 if (*args == &PL_sv_undef)
225 return PerlIO_tmpfile();
227 char *name = SvPV_nolen(*args);
229 fd = PerlLIO_open3(name, imode, perm);
231 return PerlIO_fdopen(fd, (char *) mode + 1);
234 return PerlIO_reopen(name, mode, old);
237 return PerlIO_open(name, mode);
242 return PerlIO_fdopen(fd, (char *) mode);
247 XS(XS_PerlIO__Layer__find)
251 Perl_croak(aTHX_ "Usage class->find(name[,load])");
253 char *name = SvPV_nolen(ST(1));
254 ST(0) = (strEQ(name, "crlf")
255 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
262 Perl_boot_core_PerlIO(pTHX)
264 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
270 #ifdef PERLIO_IS_STDIO
276 * Does nothing (yet) except force this file to be included in perl
277 * binary. That allows this file to force inclusion of other functions
278 * that may be required by loadable extensions e.g. for
279 * FileHandle::tmpfile
283 #undef PerlIO_tmpfile
290 #else /* PERLIO_IS_STDIO */
298 * This section is just to make sure these functions get pulled in from
302 #undef PerlIO_tmpfile
313 * Force this file to be included in perl binary. Which allows this
314 * file to force inclusion of other functions that may be required by
315 * loadable extensions e.g. for FileHandle::tmpfile
319 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
320 * results in a lot of lseek()s to regular files and lot of small
323 sfset(sfstdout, SF_SHARE, 0);
327 PerlIO_importFILE(FILE *stdio, int fl)
329 int fd = fileno(stdio);
330 PerlIO *r = PerlIO_fdopen(fd, "r+");
335 PerlIO_findFILE(PerlIO *pio)
337 int fd = PerlIO_fileno(pio);
338 FILE *f = fdopen(fd, "r+");
340 if (!f && errno == EINVAL)
342 if (!f && errno == EINVAL)
349 /*======================================================================================*/
351 * Implement all the PerlIO interface ourselves.
357 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
364 #include <sys/mman.h>
368 void PerlIO_debug(const char *fmt, ...)
369 __attribute__ ((format(__printf__, 1, 2)));
372 PerlIO_debug(const char *fmt, ...)
379 char *s = PerlEnv_getenv("PERLIO_DEBUG");
381 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
388 /* Use fixed buffer as sv_catpvf etc. needs SVs */
392 s = CopFILE(PL_curcop);
395 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
396 len = strlen(buffer);
397 vsprintf(buffer+len, fmt, ap);
398 PerlLIO_write(dbg, buffer, strlen(buffer));
400 SV *sv = newSVpvn("", 0);
403 s = CopFILE(PL_curcop);
406 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
407 (IV) CopLINE(PL_curcop));
408 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
411 PerlLIO_write(dbg, s, len);
418 /*--------------------------------------------------------------------------------------*/
421 * Inner level routines
425 * Table of pointers to the PerlIO structs (malloc'ed)
427 #define PERLIO_TABLE_SIZE 64
430 PerlIO_allocate(pTHX)
433 * Find a free slot in the table, allocating new table as necessary
438 while ((f = *last)) {
440 last = (PerlIO **) (f);
441 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
447 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
455 #undef PerlIO_fdupopen
457 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
459 if (PerlIOValid(f)) {
460 PerlIO_funcs *tab = PerlIOBase(f)->tab;
462 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
463 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
467 SETERRNO(EBADF, SS$_IVCHAN);
473 PerlIO_cleantable(pTHX_ PerlIO **tablep)
475 PerlIO *table = *tablep;
478 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
479 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
480 PerlIO *f = table + i;
492 PerlIO_list_alloc(pTHX)
495 Newz('L', list, 1, PerlIO_list_t);
501 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
504 if (--list->refcnt == 0) {
507 for (i = 0; i < list->cur; i++) {
508 if (list->array[i].arg)
509 SvREFCNT_dec(list->array[i].arg);
511 Safefree(list->array);
519 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
522 if (list->cur >= list->len) {
525 Renew(list->array, list->len, PerlIO_pair_t);
527 New('l', list->array, list->len, PerlIO_pair_t);
529 p = &(list->array[list->cur++]);
531 if ((p->arg = arg)) {
537 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
539 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
542 list = PerlIO_list_alloc(aTHX);
543 for (i=0; i < proto->cur; i++) {
545 if (proto->array[i].arg)
546 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
547 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
554 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
557 PerlIO **table = &proto->Iperlio;
560 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
561 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
562 PerlIO_allocate(aTHX); /* root slot is never used */
563 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
564 while ((f = *table)) {
566 table = (PerlIO **) (f++);
567 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
569 (void) fp_dup(f, 0, param);
578 PerlIO_destruct(pTHX)
580 PerlIO **table = &PL_perlio;
583 PerlIO_debug("Destruct %p\n",aTHX);
585 while ((f = *table)) {
587 table = (PerlIO **) (f++);
588 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
592 if (l->tab->kind & PERLIO_K_DESTRUCT) {
593 PerlIO_debug("Destruct popping %s\n", l->tab->name);
604 PerlIO_list_free(aTHX_ PL_known_layers);
605 PL_known_layers = NULL;
606 PerlIO_list_free(aTHX_ PL_def_layerlist);
607 PL_def_layerlist = NULL;
611 PerlIO_pop(pTHX_ PerlIO *f)
615 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
616 if (l->tab->Popped) {
618 * If popped returns non-zero do not free its layer structure
619 * it has either done so itself, or it is shared and still in
622 if ((*l->tab->Popped) (aTHX_ f) != 0)
630 /*--------------------------------------------------------------------------------------*/
632 * XS Interface for perl code
636 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
639 if ((SSize_t) len <= 0)
641 for (i = 0; i < PL_known_layers->cur; i++) {
642 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
643 if (memEQ(f->name, name, len)) {
644 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
648 if (load && PL_subname && PL_def_layerlist
649 && PL_def_layerlist->cur >= 2) {
650 SV *pkgsv = newSVpvn("PerlIO", 6);
651 SV *layer = newSVpvn(name, len);
654 * The two SVs are magically freed by load_module
656 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
658 return PerlIO_find_layer(aTHX_ name, len, 0);
660 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
664 #ifdef USE_ATTRIBUTES_FOR_PERLIO
667 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
670 IO *io = GvIOn((GV *) SvRV(sv));
671 PerlIO *ifp = IoIFP(io);
672 PerlIO *ofp = IoOFP(io);
673 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
679 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
682 IO *io = GvIOn((GV *) SvRV(sv));
683 PerlIO *ifp = IoIFP(io);
684 PerlIO *ofp = IoOFP(io);
685 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
691 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
693 Perl_warn(aTHX_ "clear %" SVf, sv);
698 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
700 Perl_warn(aTHX_ "free %" SVf, sv);
704 MGVTBL perlio_vtab = {
712 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
715 SV *sv = SvRV(ST(1));
720 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
722 mg = mg_find(sv, PERL_MAGIC_ext);
723 mg->mg_virtual = &perlio_vtab;
725 Perl_warn(aTHX_ "attrib %" SVf, sv);
726 for (i = 2; i < items; i++) {
728 const char *name = SvPV(ST(i), len);
729 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
731 av_push(av, SvREFCNT_inc(layer));
742 #endif /* USE_ATTIBUTES_FOR_PERLIO */
745 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
747 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
748 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
752 XS(XS_PerlIO__Layer__find)
756 Perl_croak(aTHX_ "Usage class->find(name[,load])");
759 char *name = SvPV(ST(1), len);
760 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
761 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
763 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
770 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
772 if (!PL_known_layers)
773 PL_known_layers = PerlIO_list_alloc(aTHX);
774 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
775 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
779 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
782 const char *s = names;
784 while (isSPACE(*s) || *s == ':')
789 const char *as = Nullch;
791 if (!isIDFIRST(*s)) {
793 * Message is consistent with how attribute lists are
794 * passed. Even though this means "foo : : bar" is
795 * seen as an invalid separator character.
797 char q = ((*s == '\'') ? '"' : '\'');
798 if (ckWARN(WARN_LAYER))
799 Perl_warner(aTHX_ packWARN(WARN_LAYER),
800 "perlio: invalid separator character %c%c%c in layer specification list %s",
806 } while (isALNUM(*e));
822 * It's a nul terminated string, not allowed
823 * to \ the terminating null. Anything other
824 * character is passed over.
834 if (ckWARN(WARN_LAYER))
835 Perl_warner(aTHX_ packWARN(WARN_LAYER),
836 "perlio: argument list not closed for layer \"%.*s\"",
848 bool warn_layer = ckWARN(WARN_LAYER);
849 PerlIO_funcs *layer =
850 PerlIO_find_layer(aTHX_ s, llen, 1);
852 PerlIO_list_push(aTHX_ av, layer,
859 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
872 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
874 PerlIO_funcs *tab = &PerlIO_perlio;
875 #ifdef PERLIO_USING_CRLF
878 if (PerlIO_stdio.Set_ptrcnt)
881 PerlIO_debug("Pushing %s\n", tab->name);
882 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
887 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
889 return av->array[n].arg;
893 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
895 if (n >= 0 && n < av->cur) {
896 PerlIO_debug("Layer %" IVdf " is %s\n", n,
897 av->array[n].funcs->name);
898 return av->array[n].funcs;
901 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
906 PerlIO_default_layers(pTHX)
908 if (!PL_def_layerlist) {
909 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
910 PerlIO_funcs *osLayer = &PerlIO_unix;
911 PL_def_layerlist = PerlIO_list_alloc(aTHX);
912 PerlIO_define_layer(aTHX_ & PerlIO_unix);
913 #if defined(WIN32) && !defined(UNDER_CE)
914 PerlIO_define_layer(aTHX_ & PerlIO_win32);
916 osLayer = &PerlIO_win32;
919 PerlIO_define_layer(aTHX_ & PerlIO_raw);
920 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
921 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
922 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
924 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
926 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
927 PerlIO_define_layer(aTHX_ & PerlIO_byte);
928 PerlIO_list_push(aTHX_ PL_def_layerlist,
929 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
932 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
935 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
938 if (PL_def_layerlist->cur < 2) {
939 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
941 return PL_def_layerlist;
945 Perl_boot_core_PerlIO(pTHX)
947 #ifdef USE_ATTRIBUTES_FOR_PERLIO
948 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
951 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
955 PerlIO_default_layer(pTHX_ I32 n)
957 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
960 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
963 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
964 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
967 PerlIO_stdstreams(pTHX)
970 PerlIO_allocate(aTHX);
971 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
972 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
973 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
978 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
981 Newc('L',l,tab->size,char,PerlIOl);
983 Zero(l, tab->size, char);
987 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
988 (mode) ? mode : "(Null)", (void*)arg);
989 if ((*l->tab->Pushed) (aTHX_ f, mode, arg) != 0) {
998 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1000 PerlIO_pop(aTHX_ f);
1003 PerlIO_pop(aTHX_ f);
1010 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1013 * Remove the dummy layer
1015 PerlIO_pop(aTHX_ f);
1017 * Pop back to bottom layer
1019 if (PerlIOValid(f)) {
1021 while (!(PerlIOBase(f)->tab->kind & PERLIO_K_RAW)) {
1022 if (*PerlIONext(f)) {
1023 PerlIO_pop(aTHX_ f);
1027 * Nothing bellow - push unix on top then remove it
1029 if (PerlIO_push(aTHX_ f, PerlIO_default_btm(), mode, arg)) {
1030 PerlIO_pop(aTHX_ PerlIONext(f));
1035 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1042 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1043 PerlIO_list_t *layers, IV n)
1045 IV max = layers->cur;
1048 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1050 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1061 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1065 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1066 code = PerlIO_parse_layers(aTHX_ layers, names);
1068 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0);
1070 PerlIO_list_free(aTHX_ layers);
1076 /*--------------------------------------------------------------------------------------*/
1078 * Given the abstraction above the public API functions
1082 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1084 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1085 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1086 (names) ? names : "(Null)");
1088 /* Do not flush etc. if (e.g.) switching encodings.
1089 if a pushed layer knows it needs to flush lower layers
1090 (for example :unix which is never going to call them)
1091 it can do the flush when it is pushed.
1093 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1096 /* FIXME?: Looking down the layer stack seems wrong,
1097 but is a way of reaching past (say) an encoding layer
1098 to flip CRLF-ness of the layer(s) below
1100 #ifdef PERLIO_USING_CRLF
1101 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1102 O_BINARY so we can look for it in mode.
1104 if (!(mode & O_BINARY)) {
1107 /* Perhaps we should turn on bottom-most aware layer
1108 e.g. Ilya's idea that UNIX TTY could serve
1110 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1111 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1112 /* Not in text mode - flush any pending stuff and flip it */
1114 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1116 /* Only need to turn it on in one layer so we are done */
1121 /* Not finding a CRLF aware layer presumably means we are binary
1122 which is not what was requested - so we failed
1123 We _could_ push :crlf layer but so could caller
1128 /* Either asked for BINMODE or that is normal on this platform
1129 see if any CRLF aware layers are present and turn off the flag
1130 and possibly remove layer.
1133 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1134 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1135 /* In text mode - flush any pending stuff and flip it */
1137 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
1138 #ifndef PERLIO_USING_CRLF
1139 /* CRLF is unusual case - if this is just the :crlf layer pop it */
1140 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
1141 PerlIO_pop(aTHX_ f);
1144 /* Normal case is only one layer doing this, so exit on first
1145 abnormal case can always do multiple binmode calls
1157 PerlIO__close(pTHX_ PerlIO *f)
1160 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1162 SETERRNO(EBADF, SS$_IVCHAN);
1168 Perl_PerlIO_close(pTHX_ PerlIO *f)
1171 if (PerlIOValid(f)) {
1172 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1174 PerlIO_pop(aTHX_ f);
1181 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1184 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1186 SETERRNO(EBADF, SS$_IVCHAN);
1192 PerlIO_context_layers(pTHX_ const char *mode)
1194 const char *type = NULL;
1196 * Need to supply default layer info from open.pm
1199 SV *layers = PL_curcop->cop_io;
1202 type = SvPV(layers, len);
1203 if (type && mode[0] != 'r') {
1205 * Skip to write part
1207 const char *s = strchr(type, 0);
1208 if (s && (s - type) < len) {
1217 static PerlIO_funcs *
1218 PerlIO_layer_from_ref(pTHX_ SV *sv)
1221 * For any scalar type load the handler which is bundled with perl
1223 if (SvTYPE(sv) < SVt_PVAV)
1224 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1227 * For other types allow if layer is known but don't try and load it
1229 switch (SvTYPE(sv)) {
1231 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1233 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1235 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1237 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1243 PerlIO_resolve_layers(pTHX_ const char *layers,
1244 const char *mode, int narg, SV **args)
1246 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1249 PerlIO_stdstreams(aTHX);
1253 * If it is a reference but not an object see if we have a handler
1256 if (SvROK(arg) && !sv_isobject(arg)) {
1257 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1259 def = PerlIO_list_alloc(aTHX);
1260 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1264 * Don't fail if handler cannot be found :Via(...) etc. may do
1265 * something sensible else we will just stringfy and open
1271 layers = PerlIO_context_layers(aTHX_ mode);
1272 if (layers && *layers) {
1276 av = PerlIO_list_alloc(aTHX);
1277 for (i = 0; i < def->cur; i++) {
1278 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1285 PerlIO_parse_layers(aTHX_ av, layers);
1296 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1297 int imode, int perm, PerlIO *f, int narg, SV **args)
1299 if (!f && narg == 1 && *args == &PL_sv_undef) {
1300 if ((f = PerlIO_tmpfile())) {
1302 layers = PerlIO_context_layers(aTHX_ mode);
1303 if (layers && *layers)
1304 PerlIO_apply_layers(aTHX_ f, mode, layers);
1308 PerlIO_list_t *layera = NULL;
1310 PerlIO_funcs *tab = NULL;
1311 if (PerlIOValid(f)) {
1313 * This is "reopen" - it is not tested as perl does not use it
1317 layera = PerlIO_list_alloc(aTHX);
1319 SV *arg = (l->tab->Getarg)
1320 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1322 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1323 l = *PerlIONext(&l);
1327 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1330 * Start at "top" of layer stack
1332 n = layera->cur - 1;
1334 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1343 * Found that layer 'n' can do opens - call it
1345 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1346 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1348 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1349 tab->name, layers, mode, fd, imode, perm,
1350 (void*)f, narg, (void*)args);
1351 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1354 if (n + 1 < layera->cur) {
1356 * More layers above the one that we used to open -
1359 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1)
1366 PerlIO_list_free(aTHX_ layera);
1373 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1376 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1378 SETERRNO(EBADF, SS$_IVCHAN);
1384 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1387 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1389 SETERRNO(EBADF, SS$_IVCHAN);
1395 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1398 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1400 SETERRNO(EBADF, SS$_IVCHAN);
1406 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1409 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1411 SETERRNO(EBADF, SS$_IVCHAN);
1417 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1420 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1422 SETERRNO(EBADF, SS$_IVCHAN);
1428 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1432 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1433 if (tab && tab->Flush) {
1434 return (*tab->Flush) (aTHX_ f);
1437 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1438 SETERRNO(EBADF, SS$_IVCHAN);
1443 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1444 SETERRNO(EBADF, SS$_IVCHAN);
1450 * Is it good API design to do flush-all on NULL, a potentially
1451 * errorneous input? Maybe some magical value (PerlIO*
1452 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1453 * things on fflush(NULL), but should we be bound by their design
1456 PerlIO **table = &PL_perlio;
1458 while ((f = *table)) {
1460 table = (PerlIO **) (f++);
1461 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1462 if (*f && PerlIO_flush(f) != 0)
1472 PerlIOBase_flush_linebuf(pTHX)
1474 PerlIO **table = &PL_perlio;
1476 while ((f = *table)) {
1478 table = (PerlIO **) (f++);
1479 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1482 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1483 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1491 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1494 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1496 SETERRNO(EBADF, SS$_IVCHAN);
1502 PerlIO_isutf8(PerlIO *f)
1505 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1507 SETERRNO(EBADF, SS$_IVCHAN);
1513 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1516 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1518 SETERRNO(EBADF, SS$_IVCHAN);
1524 Perl_PerlIO_error(pTHX_ PerlIO *f)
1527 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1529 SETERRNO(EBADF, SS$_IVCHAN);
1535 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1538 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1540 SETERRNO(EBADF, SS$_IVCHAN);
1544 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1547 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1549 SETERRNO(EBADF, SS$_IVCHAN);
1553 PerlIO_has_base(PerlIO *f)
1555 if (PerlIOValid(f)) {
1556 return (PerlIOBase(f)->tab->Get_base != NULL);
1562 PerlIO_fast_gets(PerlIO *f)
1564 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1565 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1566 return (tab->Set_ptrcnt != NULL);
1572 PerlIO_has_cntptr(PerlIO *f)
1574 if (PerlIOValid(f)) {
1575 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1576 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1582 PerlIO_canset_cnt(PerlIO *f)
1584 if (PerlIOValid(f)) {
1585 PerlIOl *l = PerlIOBase(f);
1586 return (l->tab->Set_ptrcnt != NULL);
1592 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1595 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1600 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1603 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1608 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1610 if (PerlIOValid(f)) {
1611 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1612 if (tab->Get_ptr == NULL)
1614 return (*tab->Get_ptr) (aTHX_ f);
1620 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1622 if (PerlIOValid(f)) {
1623 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1624 if (tab->Get_cnt == NULL)
1626 return (*tab->Get_cnt) (aTHX_ f);
1632 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1634 if (PerlIOValid(f)) {
1635 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1640 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1642 if (PerlIOValid(f)) {
1643 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1644 if (tab->Set_ptrcnt == NULL) {
1645 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1647 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1651 /*--------------------------------------------------------------------------------------*/
1653 * utf8 and raw dummy layers
1657 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1659 if (*PerlIONext(f)) {
1660 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1661 PerlIO_pop(aTHX_ f);
1662 if (tab->kind & PERLIO_K_UTF8)
1663 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1665 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1671 PerlIO_funcs PerlIO_utf8 = {
1674 PERLIO_K_DUMMY | PERLIO_F_UTF8,
1692 NULL, /* get_base */
1693 NULL, /* get_bufsiz */
1696 NULL, /* set_ptrcnt */
1699 PerlIO_funcs PerlIO_byte = {
1720 NULL, /* get_base */
1721 NULL, /* get_bufsiz */
1724 NULL, /* set_ptrcnt */
1728 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1729 IV n, const char *mode, int fd, int imode, int perm,
1730 PerlIO *old, int narg, SV **args)
1732 PerlIO_funcs *tab = PerlIO_default_btm();
1733 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1737 PerlIO_funcs PerlIO_raw = {
1758 NULL, /* get_base */
1759 NULL, /* get_bufsiz */
1762 NULL, /* set_ptrcnt */
1764 /*--------------------------------------------------------------------------------------*/
1765 /*--------------------------------------------------------------------------------------*/
1767 * "Methods" of the "base class"
1771 PerlIOBase_fileno(pTHX_ PerlIO *f)
1773 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1777 PerlIO_modestr(PerlIO *f, char *buf)
1780 IV flags = PerlIOBase(f)->flags;
1781 if (flags & PERLIO_F_APPEND) {
1783 if (flags & PERLIO_F_CANREAD) {
1787 else if (flags & PERLIO_F_CANREAD) {
1789 if (flags & PERLIO_F_CANWRITE)
1792 else if (flags & PERLIO_F_CANWRITE) {
1794 if (flags & PERLIO_F_CANREAD) {
1798 #ifdef PERLIO_USING_CRLF
1799 if (!(flags & PERLIO_F_CRLF))
1807 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1809 PerlIOl *l = PerlIOBase(f);
1811 const char *omode = mode;
1814 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1815 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1816 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1817 if (tab->Set_ptrcnt != NULL)
1818 l->flags |= PERLIO_F_FASTGETS;
1820 if (*mode == '#' || *mode == 'I')
1824 l->flags |= PERLIO_F_CANREAD;
1827 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1830 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1833 SETERRNO(EINVAL, LIB$_INVARG);
1839 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1842 l->flags &= ~PERLIO_F_CRLF;
1845 l->flags |= PERLIO_F_CRLF;
1848 SETERRNO(EINVAL, LIB$_INVARG);
1855 l->flags |= l->next->flags &
1856 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1861 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1862 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1863 l->flags, PerlIO_modestr(f, temp));
1869 PerlIOBase_popped(pTHX_ PerlIO *f)
1875 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1878 * Save the position as current head considers it
1880 Off_t old = PerlIO_tell(f);
1882 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1883 PerlIOSelf(f, PerlIOBuf)->posn = old;
1884 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1889 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1891 STDCHAR *buf = (STDCHAR *) vbuf;
1893 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1896 SSize_t avail = PerlIO_get_cnt(f);
1899 take = (count < avail) ? count : avail;
1901 STDCHAR *ptr = PerlIO_get_ptr(f);
1902 Copy(ptr, buf, take, STDCHAR);
1903 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1907 if (count > 0 && avail <= 0) {
1908 if (PerlIO_fill(f) != 0)
1912 return (buf - (STDCHAR *) vbuf);
1918 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1924 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1930 PerlIOBase_close(pTHX_ PerlIO *f)
1933 PerlIO *n = PerlIONext(f);
1934 if (PerlIO_flush(f) != 0)
1936 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1938 PerlIOBase(f)->flags &=
1939 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1944 PerlIOBase_eof(pTHX_ PerlIO *f)
1946 if (PerlIOValid(f)) {
1947 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1953 PerlIOBase_error(pTHX_ PerlIO *f)
1955 if (PerlIOValid(f)) {
1956 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1962 PerlIOBase_clearerr(pTHX_ PerlIO *f)
1964 if (PerlIOValid(f)) {
1965 PerlIO *n = PerlIONext(f);
1966 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1973 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
1975 if (PerlIOValid(f)) {
1976 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
1981 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
1987 return sv_dup(arg, param);
1990 return newSVsv(arg);
1993 return newSVsv(arg);
1998 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2000 PerlIO *nexto = PerlIONext(o);
2001 if (PerlIOValid(nexto)) {
2002 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2003 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2006 PerlIO_funcs *self = PerlIOBase(o)->tab;
2009 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2010 self->name, (void*)f, (void*)o, (void*)param);
2012 arg = (*self->Getarg)(aTHX_ o,param,flags);
2014 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2022 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2024 perl_mutex PerlIO_mutex;
2026 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2031 /* Place holder for stdstreams call ??? */
2033 MUTEX_INIT(&PerlIO_mutex);
2038 PerlIOUnix_refcnt_inc(int fd)
2040 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2042 MUTEX_LOCK(&PerlIO_mutex);
2044 PerlIO_fd_refcnt[fd]++;
2045 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2047 MUTEX_UNLOCK(&PerlIO_mutex);
2053 PerlIOUnix_refcnt_dec(int fd)
2056 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2058 MUTEX_LOCK(&PerlIO_mutex);
2060 cnt = --PerlIO_fd_refcnt[fd];
2061 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2063 MUTEX_UNLOCK(&PerlIO_mutex);
2070 PerlIO_cleanup(pTHX)
2074 PerlIO_debug("Cleanup %p\n",aTHX);
2076 /* Raise STDIN..STDERR refcount so we don't close them */
2077 for (i=0; i < 3; i++)
2078 PerlIOUnix_refcnt_inc(i);
2079 PerlIO_cleantable(aTHX_ &PL_perlio);
2080 /* Restore STDIN..STDERR refcount */
2081 for (i=0; i < 3; i++)
2082 PerlIOUnix_refcnt_dec(i);
2087 /*--------------------------------------------------------------------------------------*/
2089 * Bottom-most level for UNIX-like case
2093 struct _PerlIO base; /* The generic part */
2094 int fd; /* UNIX like file descriptor */
2095 int oflags; /* open/fcntl flags */
2099 PerlIOUnix_oflags(const char *mode)
2102 if (*mode == 'I' || *mode == '#')
2107 if (*++mode == '+') {
2114 oflags = O_CREAT | O_TRUNC;
2115 if (*++mode == '+') {
2124 oflags = O_CREAT | O_APPEND;
2125 if (*++mode == '+') {
2138 else if (*mode == 't') {
2140 oflags &= ~O_BINARY;
2144 * Always open in binary mode
2147 if (*mode || oflags == -1) {
2148 SETERRNO(EINVAL, LIB$_INVARG);
2155 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2157 return PerlIOSelf(f, PerlIOUnix)->fd;
2161 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2163 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
2164 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2165 if (*PerlIONext(f)) {
2166 /* We never call down so any pending stuff now */
2167 PerlIO_flush(PerlIONext(f));
2168 s->fd = PerlIO_fileno(PerlIONext(f));
2170 * XXX could (or should) we retrieve the oflags from the open file
2171 * handle rather than believing the "mode" we are passed in? XXX
2172 * Should the value on NULL mode be 0 or -1?
2174 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2176 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2181 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2182 IV n, const char *mode, int fd, int imode,
2183 int perm, PerlIO *f, int narg, SV **args)
2186 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2187 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2190 char *path = SvPV_nolen(*args);
2194 imode = PerlIOUnix_oflags(mode);
2198 fd = PerlLIO_open3(path, imode, perm);
2206 f = PerlIO_allocate(aTHX);
2207 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2211 s = PerlIOSelf(f, PerlIOUnix);
2214 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2215 PerlIOUnix_refcnt_inc(fd);
2221 * FIXME: pop layers ???
2229 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2231 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2233 if (flags & PERLIO_DUP_FD) {
2234 fd = PerlLIO_dup(fd);
2236 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2237 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2239 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2240 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2242 PerlIOUnix_refcnt_inc(fd);
2251 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2253 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2254 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2257 SSize_t len = PerlLIO_read(fd, vbuf, count);
2258 if (len >= 0 || errno != EINTR) {
2260 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2261 else if (len == 0 && count != 0)
2262 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2270 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2272 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2274 SSize_t len = PerlLIO_write(fd, vbuf, count);
2275 if (len >= 0 || errno != EINTR) {
2277 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2285 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2288 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2289 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2290 return (new == (Off_t) - 1) ? -1 : 0;
2294 PerlIOUnix_tell(pTHX_ PerlIO *f)
2296 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2301 PerlIOUnix_close(pTHX_ PerlIO *f)
2303 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2305 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2306 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2307 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2312 SETERRNO(EBADF,SS$_IVCHAN);
2315 while (PerlLIO_close(fd) != 0) {
2316 if (errno != EINTR) {
2323 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2328 PerlIO_funcs PerlIO_unix = {
2344 PerlIOBase_noop_ok, /* flush */
2345 PerlIOBase_noop_fail, /* fill */
2348 PerlIOBase_clearerr,
2349 PerlIOBase_setlinebuf,
2350 NULL, /* get_base */
2351 NULL, /* get_bufsiz */
2354 NULL, /* set_ptrcnt */
2357 /*--------------------------------------------------------------------------------------*/
2363 struct _PerlIO base;
2364 FILE *stdio; /* The stream */
2368 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2370 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2374 PerlIOStdio_mode(const char *mode, char *tmode)
2380 #ifdef PERLIO_USING_CRLF
2388 * This isn't used yet ...
2391 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2393 if (*PerlIONext(f)) {
2394 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2397 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2398 PerlIOStdio_mode(mode, tmode));
2401 /* We never call down so any pending stuff now */
2402 PerlIO_flush(PerlIONext(f));
2407 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2411 PerlIO_importFILE(FILE *stdio, int fl)
2417 PerlIOSelf(PerlIO_push
2418 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2419 "r+", Nullsv), PerlIOStdio);
2426 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2427 IV n, const char *mode, int fd, int imode,
2428 int perm, PerlIO *f, int narg, SV **args)
2432 char *path = SvPV_nolen(*args);
2433 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2435 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2436 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2441 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2446 char *path = SvPV_nolen(*args);
2449 fd = PerlLIO_open3(path, imode, perm);
2452 FILE *stdio = PerlSIO_fopen(path, mode);
2455 PerlIOSelf(PerlIO_push
2456 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2457 (mode = PerlIOStdio_mode(mode, tmode)),
2461 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2476 stdio = PerlSIO_stdin;
2479 stdio = PerlSIO_stdout;
2482 stdio = PerlSIO_stderr;
2487 stdio = PerlSIO_fdopen(fd, mode =
2488 PerlIOStdio_mode(mode, tmode));
2492 PerlIOSelf(PerlIO_push
2493 (aTHX_(f = PerlIO_allocate(aTHX)), self,
2494 mode, PerlIOArg), PerlIOStdio);
2496 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2505 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2507 /* This assumes no layers underneath - which is what
2508 happens, but is not how I remember it. NI-S 2001/10/16
2510 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2511 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2512 if (flags & PERLIO_DUP_FD) {
2513 int fd = PerlLIO_dup(fileno(stdio));
2516 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2519 /* FIXME: To avoid messy error recovery if dup fails
2520 re-use the existing stdio as though flag was not set
2524 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2525 PerlIOUnix_refcnt_inc(fileno(stdio));
2531 PerlIOStdio_close(pTHX_ PerlIO *f)
2533 #ifdef SOCKS5_VERSION_NAME
2535 Sock_size_t optlen = sizeof(int);
2537 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2538 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2539 /* Do not close it but do flush any buffers */
2544 #ifdef SOCKS5_VERSION_NAME
2546 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2548 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2550 PerlSIO_fclose(stdio)
2559 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2561 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2564 STDCHAR *buf = (STDCHAR *) vbuf;
2566 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2567 * stdio does not do that for fread()
2569 int ch = PerlSIO_fgetc(s);
2576 got = PerlSIO_fread(vbuf, 1, count, s);
2581 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2583 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2584 STDCHAR *buf = ((STDCHAR *) vbuf) + count - 1;
2587 int ch = *buf-- & 0xff;
2588 if (PerlSIO_ungetc(ch, s) != ch)
2597 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2599 return PerlSIO_fwrite(vbuf, 1, count,
2600 PerlIOSelf(f, PerlIOStdio)->stdio);
2604 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2606 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2607 return PerlSIO_fseek(stdio, offset, whence);
2611 PerlIOStdio_tell(pTHX_ PerlIO *f)
2613 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2614 return PerlSIO_ftell(stdio);
2618 PerlIOStdio_flush(pTHX_ PerlIO *f)
2620 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2621 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2622 return PerlSIO_fflush(stdio);
2627 * FIXME: This discards ungetc() and pre-read stuff which is not
2628 * right if this is just a "sync" from a layer above Suspect right
2629 * design is to do _this_ but not have layer above flush this
2630 * layer read-to-read
2633 * Not writeable - sync by attempting a seek
2636 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2644 PerlIOStdio_fill(pTHX_ PerlIO *f)
2646 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2649 * fflush()ing read-only streams can cause trouble on some stdio-s
2651 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2652 if (PerlSIO_fflush(stdio) != 0)
2655 c = PerlSIO_fgetc(stdio);
2656 if (c == EOF || PerlSIO_ungetc(c, stdio) != c)
2662 PerlIOStdio_eof(pTHX_ PerlIO *f)
2664 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2668 PerlIOStdio_error(pTHX_ PerlIO *f)
2670 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2674 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2676 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2680 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2682 #ifdef HAS_SETLINEBUF
2683 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2685 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2691 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2693 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2694 return (STDCHAR*)PerlSIO_get_base(stdio);
2698 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2700 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2701 return PerlSIO_get_bufsiz(stdio);
2705 #ifdef USE_STDIO_PTR
2707 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2709 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2710 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2714 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2716 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2717 return PerlSIO_get_cnt(stdio);
2721 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2723 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2725 #ifdef STDIO_PTR_LVALUE
2726 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2727 #ifdef STDIO_PTR_LVAL_SETS_CNT
2728 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2729 assert(PerlSIO_get_cnt(stdio) == (cnt));
2732 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2734 * Setting ptr _does_ change cnt - we are done
2738 #else /* STDIO_PTR_LVALUE */
2740 #endif /* STDIO_PTR_LVALUE */
2743 * Now (or only) set cnt
2745 #ifdef STDIO_CNT_LVALUE
2746 PerlSIO_set_cnt(stdio, cnt);
2747 #else /* STDIO_CNT_LVALUE */
2748 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2749 PerlSIO_set_ptr(stdio,
2750 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2752 #else /* STDIO_PTR_LVAL_SETS_CNT */
2754 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2755 #endif /* STDIO_CNT_LVALUE */
2760 PerlIO_funcs PerlIO_stdio = {
2762 sizeof(PerlIOStdio),
2780 PerlIOStdio_clearerr,
2781 PerlIOStdio_setlinebuf,
2783 PerlIOStdio_get_base,
2784 PerlIOStdio_get_bufsiz,
2789 #ifdef USE_STDIO_PTR
2790 PerlIOStdio_get_ptr,
2791 PerlIOStdio_get_cnt,
2792 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2793 PerlIOStdio_set_ptrcnt
2794 #else /* STDIO_PTR_LVALUE */
2796 #endif /* STDIO_PTR_LVALUE */
2797 #else /* USE_STDIO_PTR */
2801 #endif /* USE_STDIO_PTR */
2805 PerlIO_exportFILE(PerlIO *f, int fl)
2810 stdio = fdopen(PerlIO_fileno(f), "r+");
2813 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, "r+", Nullsv),
2821 PerlIO_findFILE(PerlIO *f)
2825 if (l->tab == &PerlIO_stdio) {
2826 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2829 l = *PerlIONext(&l);
2831 return PerlIO_exportFILE(f, 0);
2835 PerlIO_releaseFILE(PerlIO *p, FILE *f)
2839 /*--------------------------------------------------------------------------------------*/
2841 * perlio buffer layer
2845 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2847 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2848 int fd = PerlIO_fileno(f);
2850 if (fd >= 0 && PerlLIO_isatty(fd)) {
2851 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
2853 posn = PerlIO_tell(PerlIONext(f));
2854 if (posn != (Off_t) - 1) {
2857 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2861 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2862 IV n, const char *mode, int fd, int imode, int perm,
2863 PerlIO *f, int narg, SV **args)
2865 if (PerlIOValid(f)) {
2866 PerlIO *next = PerlIONext(f);
2867 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
2868 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2870 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
2875 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
2883 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
2886 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
2888 * if push fails during open, open fails. close will pop us.
2893 fd = PerlIO_fileno(f);
2894 #ifdef PERLIO_USING_CRLF
2896 * do something about failing setmode()? --jhi
2898 PerlLIO_setmode(fd, O_BINARY);
2900 if (init && fd == 2) {
2902 * Initial stderr is unbuffered
2904 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
2913 * This "flush" is akin to sfio's sync in that it handles files in either
2914 * read or write state
2917 PerlIOBuf_flush(pTHX_ PerlIO *f)
2919 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2921 PerlIO *n = PerlIONext(f);
2922 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
2924 * write() the buffer
2926 STDCHAR *buf = b->buf;
2928 while (p < b->ptr) {
2929 SSize_t count = PerlIO_write(n, p, b->ptr - p);
2933 else if (count < 0 || PerlIO_error(n)) {
2934 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2939 b->posn += (p - buf);
2941 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
2942 STDCHAR *buf = PerlIO_get_base(f);
2944 * Note position change
2946 b->posn += (b->ptr - buf);
2947 if (b->ptr < b->end) {
2949 * We did not consume all of it
2951 if (PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
2952 /* Reload n as some layers may pop themselves on seek */
2953 b->posn = PerlIO_tell(n = PerlIONext(f));
2957 b->ptr = b->end = b->buf;
2958 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
2959 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
2960 /* FIXME: Doing downstream flush may be sub-optimal see PerlIOBuf_fill() below */
2961 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
2967 PerlIOBuf_fill(pTHX_ PerlIO *f)
2969 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
2970 PerlIO *n = PerlIONext(f);
2973 * FIXME: doing the down-stream flush maybe sub-optimal if it causes
2974 * pre-read data in stdio buffer to be discarded.
2975 * However, skipping the flush also skips _our_ hosekeeping
2976 * and breaks tell tests. So we do the flush.
2978 if (PerlIO_flush(f) != 0)
2980 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
2981 PerlIOBase_flush_linebuf(aTHX);
2984 PerlIO_get_base(f); /* allocate via vtable */
2986 b->ptr = b->end = b->buf;
2987 if (PerlIO_fast_gets(n)) {
2989 * Layer below is also buffered. We do _NOT_ want to call its
2990 * ->Read() because that will loop till it gets what we asked for
2991 * which may hang on a pipe etc. Instead take anything it has to
2992 * hand, or ask it to fill _once_.
2994 avail = PerlIO_get_cnt(n);
2996 avail = PerlIO_fill(n);
2998 avail = PerlIO_get_cnt(n);
3000 if (!PerlIO_error(n) && PerlIO_eof(n))
3005 STDCHAR *ptr = PerlIO_get_ptr(n);
3006 SSize_t cnt = avail;
3007 if (avail > b->bufsiz)
3009 Copy(ptr, b->buf, avail, STDCHAR);
3010 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3014 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3018 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3020 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3023 b->end = b->buf + avail;
3024 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3029 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3031 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3032 if (PerlIOValid(f)) {
3035 return PerlIOBase_read(aTHX_ f, vbuf, count);
3041 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3043 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3044 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3047 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3052 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3054 * Buffer is already a read buffer, we can overwrite any chars
3055 * which have been read back to buffer start
3057 avail = (b->ptr - b->buf);
3061 * Buffer is idle, set it up so whole buffer is available for
3065 b->end = b->buf + avail;
3067 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3069 * Buffer extends _back_ from where we are now
3071 b->posn -= b->bufsiz;
3073 if (avail > (SSize_t) count) {
3075 * If we have space for more than count, just move count
3083 * In simple stdio-like ungetc() case chars will be already
3086 if (buf != b->ptr) {
3087 Copy(buf, b->ptr, avail, STDCHAR);
3091 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3098 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3100 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3101 const STDCHAR *buf = (const STDCHAR *) vbuf;
3105 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3108 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3109 if ((SSize_t) count < avail)
3111 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3112 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3127 Copy(buf, b->ptr, avail, STDCHAR);
3134 if (b->ptr >= (b->buf + b->bufsiz))
3137 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3143 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3146 if ((code = PerlIO_flush(f)) == 0) {
3147 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3148 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3149 code = PerlIO_seek(PerlIONext(f), offset, whence);
3151 b->posn = PerlIO_tell(PerlIONext(f));
3158 PerlIOBuf_tell(pTHX_ PerlIO *f)
3160 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3162 * b->posn is file position where b->buf was read, or will be written
3164 Off_t posn = b->posn;
3167 * If buffer is valid adjust position by amount in buffer
3169 posn += (b->ptr - b->buf);
3175 PerlIOBuf_close(pTHX_ PerlIO *f)
3177 IV code = PerlIOBase_close(aTHX_ f);
3178 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3179 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3183 b->ptr = b->end = b->buf;
3184 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3189 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3191 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3198 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3200 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3203 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3204 return (b->end - b->ptr);
3209 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3211 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3216 Newz('B',b->buf,b->bufsiz, STDCHAR);
3218 b->buf = (STDCHAR *) & b->oneword;
3219 b->bufsiz = sizeof(b->oneword);
3228 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3230 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3233 return (b->end - b->buf);
3237 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3239 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3243 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3244 assert(PerlIO_get_cnt(f) == cnt);
3245 assert(b->ptr >= b->buf);
3247 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3251 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3253 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3258 PerlIO_funcs PerlIO_perlio = {
3278 PerlIOBase_clearerr,
3279 PerlIOBase_setlinebuf,
3284 PerlIOBuf_set_ptrcnt,
3287 /*--------------------------------------------------------------------------------------*/
3289 * Temp layer to hold unread chars when cannot do it any other way
3293 PerlIOPending_fill(pTHX_ PerlIO *f)
3296 * Should never happen
3303 PerlIOPending_close(pTHX_ PerlIO *f)
3306 * A tad tricky - flush pops us, then we close new top
3309 return PerlIO_close(f);
3313 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3316 * A tad tricky - flush pops us, then we seek new top
3319 return PerlIO_seek(f, offset, whence);
3324 PerlIOPending_flush(pTHX_ PerlIO *f)
3326 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3327 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3331 PerlIO_pop(aTHX_ f);
3336 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3342 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3347 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3349 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
3350 PerlIOl *l = PerlIOBase(f);
3352 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3353 * etc. get muddled when it changes mid-string when we auto-pop.
3355 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3356 (PerlIOBase(PerlIONext(f))->
3357 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3362 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3364 SSize_t avail = PerlIO_get_cnt(f);
3369 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3370 if (got >= 0 && got < count) {
3372 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3373 if (more >= 0 || got == 0)
3379 PerlIO_funcs PerlIO_pending = {
3383 PerlIOPending_pushed,
3394 PerlIOPending_close,
3395 PerlIOPending_flush,
3399 PerlIOBase_clearerr,
3400 PerlIOBase_setlinebuf,
3405 PerlIOPending_set_ptrcnt,
3410 /*--------------------------------------------------------------------------------------*/
3412 * crlf - translation On read translate CR,LF to "\n" we do this by
3413 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3414 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3418 PerlIOBuf base; /* PerlIOBuf stuff */
3419 STDCHAR *nl; /* Position of crlf we "lied" about in the
3424 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3427 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3428 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
3430 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3431 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3432 PerlIOBase(f)->flags);
3439 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3441 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3446 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3447 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3449 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3450 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3452 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3457 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3458 b->end = b->ptr = b->buf + b->bufsiz;
3459 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3460 b->posn -= b->bufsiz;
3462 while (count > 0 && b->ptr > b->buf) {
3465 if (b->ptr - 2 >= b->buf) {
3488 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3490 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3493 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3494 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3495 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3496 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3498 while (nl < b->end && *nl != 0xd)
3500 if (nl < b->end && *nl == 0xd) {
3502 if (nl + 1 < b->end) {
3509 * Not CR,LF but just CR
3517 * Blast - found CR as last char in buffer
3522 * They may not care, defer work as long as
3526 return (nl - b->ptr);
3530 b->ptr++; /* say we have read it as far as
3531 * flush() is concerned */
3532 b->buf++; /* Leave space in front of buffer */
3533 b->bufsiz--; /* Buffer is thus smaller */
3534 code = PerlIO_fill(f); /* Fetch some more */
3535 b->bufsiz++; /* Restore size for next time */
3536 b->buf--; /* Point at space */
3537 b->ptr = nl = b->buf; /* Which is what we hand
3539 b->posn--; /* Buffer starts here */
3540 *nl = 0xd; /* Fill in the CR */
3542 goto test; /* fill() call worked */
3544 * CR at EOF - just fall through
3546 /* Should we clear EOF though ??? */
3551 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3557 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3559 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3560 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3561 IV flags = PerlIOBase(f)->flags;
3567 if (ptr == b->end && *c->nl == 0xd) {
3568 /* Defered CR at end of buffer case - we lied about count */
3580 * Test code - delete when it works ...
3582 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3583 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3584 /* Defered CR at end of buffer case - we lied about count */
3590 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3591 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3599 * They have taken what we lied about
3607 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3611 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3613 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3614 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3616 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3617 const STDCHAR *buf = (const STDCHAR *) vbuf;
3618 const STDCHAR *ebuf = buf + count;
3621 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3623 while (buf < ebuf) {
3624 STDCHAR *eptr = b->buf + b->bufsiz;
3625 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3626 while (buf < ebuf && b->ptr < eptr) {
3628 if ((b->ptr + 2) > eptr) {
3636 *(b->ptr)++ = 0xd; /* CR */
3637 *(b->ptr)++ = 0xa; /* LF */
3639 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3649 if (b->ptr >= eptr) {
3655 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3657 return (buf - (STDCHAR *) vbuf);
3662 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3664 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3669 return PerlIOBuf_flush(aTHX_ f);
3672 PerlIO_funcs PerlIO_crlf = {
3675 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF,
3677 PerlIOBase_noop_ok, /* popped */
3682 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3684 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3685 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3693 PerlIOBase_clearerr,
3694 PerlIOBase_setlinebuf,
3699 PerlIOCrlf_set_ptrcnt,
3703 /*--------------------------------------------------------------------------------------*/
3705 * mmap as "buffer" layer
3709 PerlIOBuf base; /* PerlIOBuf stuff */
3710 Mmap_t mptr; /* Mapped address */
3711 Size_t len; /* mapped length */
3712 STDCHAR *bbuf; /* malloced buffer if map fails */
3715 static size_t page_size = 0;
3718 PerlIOMmap_map(pTHX_ PerlIO *f)
3720 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3721 IV flags = PerlIOBase(f)->flags;
3725 if (flags & PERLIO_F_CANREAD) {
3726 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3727 int fd = PerlIO_fileno(f);
3729 code = Fstat(fd, &st);
3730 if (code == 0 && S_ISREG(st.st_mode)) {
3731 SSize_t len = st.st_size - b->posn;
3735 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3737 SETERRNO(0, SS$_NORMAL);
3738 # ifdef _SC_PAGESIZE
3739 page_size = sysconf(_SC_PAGESIZE);
3741 page_size = sysconf(_SC_PAGE_SIZE);
3743 if ((long) page_size < 0) {
3748 (void) SvUPGRADE(error, SVt_PV);
3749 msg = SvPVx(error, n_a);
3750 Perl_croak(aTHX_ "panic: sysconf: %s",
3755 "panic: sysconf: pagesize unknown");
3759 # ifdef HAS_GETPAGESIZE
3760 page_size = getpagesize();
3762 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3763 page_size = PAGESIZE; /* compiletime, bad */
3767 if ((IV) page_size <= 0)
3768 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
3773 * This is a hack - should never happen - open should
3776 b->posn = PerlIO_tell(PerlIONext(f));
3778 posn = (b->posn / page_size) * page_size;
3779 len = st.st_size - posn;
3780 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
3781 if (m->mptr && m->mptr != (Mmap_t) - 1) {
3782 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
3783 madvise(m->mptr, len, MADV_SEQUENTIAL);
3785 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
3786 madvise(m->mptr, len, MADV_WILLNEED);
3788 PerlIOBase(f)->flags =
3789 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
3790 b->end = ((STDCHAR *) m->mptr) + len;
3791 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
3800 PerlIOBase(f)->flags =
3801 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
3803 b->ptr = b->end = b->ptr;
3812 PerlIOMmap_unmap(pTHX_ PerlIO *f)
3814 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3815 PerlIOBuf *b = &m->base;
3819 code = munmap(m->mptr, m->len);
3823 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
3826 b->ptr = b->end = b->buf;
3827 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3833 PerlIOMmap_get_base(pTHX_ PerlIO *f)
3835 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3836 PerlIOBuf *b = &m->base;
3837 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3839 * Already have a readbuffer in progress
3845 * We have a write buffer or flushed PerlIOBuf read buffer
3847 m->bbuf = b->buf; /* save it in case we need it again */
3848 b->buf = NULL; /* Clear to trigger below */
3851 PerlIOMmap_map(aTHX_ f); /* Try and map it */
3854 * Map did not work - recover PerlIOBuf buffer if we have one
3859 b->ptr = b->end = b->buf;
3862 return PerlIOBuf_get_base(aTHX_ f);
3866 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3868 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3869 PerlIOBuf *b = &m->base;
3870 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3872 if (b->ptr && (b->ptr - count) >= b->buf
3873 && memEQ(b->ptr - count, vbuf, count)) {
3875 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3880 * Loose the unwritable mapped buffer
3884 * If flush took the "buffer" see if we have one from before
3886 if (!b->buf && m->bbuf)
3889 PerlIOBuf_get_base(aTHX_ f);
3893 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3897 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3899 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3900 PerlIOBuf *b = &m->base;
3901 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3903 * No, or wrong sort of, buffer
3906 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3910 * If unmap took the "buffer" see if we have one from before
3912 if (!b->buf && m->bbuf)
3915 PerlIOBuf_get_base(aTHX_ f);
3919 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3923 PerlIOMmap_flush(pTHX_ PerlIO *f)
3925 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3926 PerlIOBuf *b = &m->base;
3927 IV code = PerlIOBuf_flush(aTHX_ f);
3929 * Now we are "synced" at PerlIOBuf level
3936 if (PerlIOMmap_unmap(aTHX_ f) != 0)
3941 * We seem to have a PerlIOBuf buffer which was not mapped
3942 * remember it in case we need one later
3951 PerlIOMmap_fill(pTHX_ PerlIO *f)
3953 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3954 IV code = PerlIO_flush(f);
3955 if (code == 0 && !b->buf) {
3956 code = PerlIOMmap_map(aTHX_ f);
3958 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3959 code = PerlIOBuf_fill(aTHX_ f);
3965 PerlIOMmap_close(pTHX_ PerlIO *f)
3967 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3968 PerlIOBuf *b = &m->base;
3969 IV code = PerlIO_flush(f);
3973 b->ptr = b->end = b->buf;
3975 if (PerlIOBuf_close(aTHX_ f) != 0)
3981 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3983 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3987 PerlIO_funcs PerlIO_mmap = {
4007 PerlIOBase_clearerr,
4008 PerlIOBase_setlinebuf,
4009 PerlIOMmap_get_base,
4013 PerlIOBuf_set_ptrcnt,
4016 #endif /* HAS_MMAP */
4019 Perl_PerlIO_stdin(pTHX)
4022 PerlIO_stdstreams(aTHX);
4024 return &PL_perlio[1];
4028 Perl_PerlIO_stdout(pTHX)
4031 PerlIO_stdstreams(aTHX);
4033 return &PL_perlio[2];
4037 Perl_PerlIO_stderr(pTHX)
4040 PerlIO_stdstreams(aTHX);
4042 return &PL_perlio[3];
4045 /*--------------------------------------------------------------------------------------*/
4048 PerlIO_getname(PerlIO *f, char *buf)
4053 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4055 name = fgetname(stdio, buf);
4057 Perl_croak(aTHX_ "Don't know how to get file name");
4063 /*--------------------------------------------------------------------------------------*/
4065 * Functions which can be called on any kind of PerlIO implemented in
4069 #undef PerlIO_fdopen
4071 PerlIO_fdopen(int fd, const char *mode)
4074 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4079 PerlIO_open(const char *path, const char *mode)
4082 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4083 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4086 #undef Perlio_reopen
4088 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4091 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4092 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4097 PerlIO_getc(PerlIO *f)
4101 SSize_t count = PerlIO_read(f, buf, 1);
4103 return (unsigned char) buf[0];
4108 #undef PerlIO_ungetc
4110 PerlIO_ungetc(PerlIO *f, int ch)
4115 if (PerlIO_unread(f, &buf, 1) == 1)
4123 PerlIO_putc(PerlIO *f, int ch)
4127 return PerlIO_write(f, &buf, 1);
4132 PerlIO_puts(PerlIO *f, const char *s)
4135 STRLEN len = strlen(s);
4136 return PerlIO_write(f, s, len);
4139 #undef PerlIO_rewind
4141 PerlIO_rewind(PerlIO *f)
4144 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4148 #undef PerlIO_vprintf
4150 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4153 SV *sv = newSVpvn("", 0);
4159 Perl_va_copy(ap, apc);
4160 sv_vcatpvf(sv, fmt, &apc);
4162 sv_vcatpvf(sv, fmt, &ap);
4165 wrote = PerlIO_write(f, s, len);
4170 #undef PerlIO_printf
4172 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4177 result = PerlIO_vprintf(f, fmt, ap);
4182 #undef PerlIO_stdoutf
4184 PerlIO_stdoutf(const char *fmt, ...)
4190 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4195 #undef PerlIO_tmpfile
4197 PerlIO_tmpfile(void)
4200 * I have no idea how portable mkstemp() is ...
4202 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4205 FILE *stdio = PerlSIO_tmpfile();
4208 PerlIOSelf(PerlIO_push
4209 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4210 "w+", Nullsv), PerlIOStdio);
4216 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4217 int fd = mkstemp(SvPVX(sv));
4220 f = PerlIO_fdopen(fd, "w+");
4222 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4224 PerlLIO_unlink(SvPVX(sv));
4234 #endif /* USE_SFIO */
4235 #endif /* PERLIO_IS_STDIO */
4237 /*======================================================================================*/
4239 * Now some functions in terms of above which may be needed even if we are
4240 * not in true PerlIO mode
4244 #undef PerlIO_setpos
4246 PerlIO_setpos(PerlIO *f, SV *pos)
4251 Off_t *posn = (Off_t *) SvPV(pos, len);
4252 if (f && len == sizeof(Off_t))
4253 return PerlIO_seek(f, *posn, SEEK_SET);
4255 SETERRNO(EINVAL, SS$_IVCHAN);
4259 #undef PerlIO_setpos
4261 PerlIO_setpos(PerlIO *f, SV *pos)
4266 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4267 if (f && len == sizeof(Fpos_t)) {
4268 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4269 return fsetpos64(f, fpos);
4271 return fsetpos(f, fpos);
4275 SETERRNO(EINVAL, SS$_IVCHAN);
4281 #undef PerlIO_getpos
4283 PerlIO_getpos(PerlIO *f, SV *pos)
4286 Off_t posn = PerlIO_tell(f);
4287 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4288 return (posn == (Off_t) - 1) ? -1 : 0;
4291 #undef PerlIO_getpos
4293 PerlIO_getpos(PerlIO *f, SV *pos)
4298 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4299 code = fgetpos64(f, &fpos);
4301 code = fgetpos(f, &fpos);
4303 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4308 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4311 vprintf(char *pat, char *args)
4313 _doprnt(pat, args, stdout);
4314 return 0; /* wrong, but perl doesn't use the return
4319 vfprintf(FILE *fd, char *pat, char *args)
4321 _doprnt(pat, args, fd);
4322 return 0; /* wrong, but perl doesn't use the return
4328 #ifndef PerlIO_vsprintf
4330 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4332 int val = vsprintf(s, fmt, ap);
4334 if (strlen(s) >= (STRLEN) n) {
4336 (void) PerlIO_puts(Perl_error_log,
4337 "panic: sprintf overflow - memory corrupted!\n");
4345 #ifndef PerlIO_sprintf
4347 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4352 result = PerlIO_vsprintf(s, n, fmt, ap);