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
162 || strEQ(names, ":crlf")
163 || strEQ(names, ":raw")
164 || strEQ(names, ":bytes")
168 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
176 PerlIO_destruct(pTHX)
181 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
186 return perlsio_binmode(fp, iotype, mode);
191 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
196 #ifdef PERL_IMPLICIT_SYS
197 return PerlSIO_fdupopen(f);
200 return win32_fdupopen(f);
203 int fd = PerlLIO_dup(PerlIO_fileno(f));
206 int omode = fcntl(fd, F_GETFL);
208 omode = djgpp_get_stream_mode(f);
210 PerlIO_intmode2str(omode,mode,NULL);
211 /* the r+ is a hack */
212 return PerlIO_fdopen(fd, mode);
217 SETERRNO(EBADF, SS$_IVCHAN);
227 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
231 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
232 int imode, int perm, PerlIO *old, int narg, SV **args)
236 Perl_croak(aTHX_ "More than one argument to open");
238 if (*args == &PL_sv_undef)
239 return PerlIO_tmpfile();
241 char *name = SvPV_nolen(*args);
243 fd = PerlLIO_open3(name, imode, perm);
245 return PerlIO_fdopen(fd, (char *) mode + 1);
248 return PerlIO_reopen(name, mode, old);
251 return PerlIO_open(name, mode);
256 return PerlIO_fdopen(fd, (char *) mode);
261 XS(XS_PerlIO__Layer__find)
265 Perl_croak(aTHX_ "Usage class->find(name[,load])");
267 char *name = SvPV_nolen(ST(1));
268 ST(0) = (strEQ(name, "crlf")
269 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
276 Perl_boot_core_PerlIO(pTHX)
278 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
284 #ifdef PERLIO_IS_STDIO
290 * Does nothing (yet) except force this file to be included in perl
291 * binary. That allows this file to force inclusion of other functions
292 * that may be required by loadable extensions e.g. for
293 * FileHandle::tmpfile
297 #undef PerlIO_tmpfile
304 #else /* PERLIO_IS_STDIO */
312 * This section is just to make sure these functions get pulled in from
316 #undef PerlIO_tmpfile
327 * Force this file to be included in perl binary. Which allows this
328 * file to force inclusion of other functions that may be required by
329 * loadable extensions e.g. for FileHandle::tmpfile
333 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
334 * results in a lot of lseek()s to regular files and lot of small
337 sfset(sfstdout, SF_SHARE, 0);
341 PerlIO_importFILE(FILE *stdio, const char *mode)
343 int fd = fileno(stdio);
344 if (!mode || !*mode) {
347 return PerlIO_fdopen(fd, mode);
351 PerlIO_findFILE(PerlIO *pio)
353 int fd = PerlIO_fileno(pio);
354 FILE *f = fdopen(fd, "r+");
356 if (!f && errno == EINVAL)
358 if (!f && errno == EINVAL)
365 /*======================================================================================*/
367 * Implement all the PerlIO interface ourselves.
373 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
380 #include <sys/mman.h>
384 void PerlIO_debug(const char *fmt, ...)
385 __attribute__ ((format(__printf__, 1, 2)));
388 PerlIO_debug(const char *fmt, ...)
395 char *s = PerlEnv_getenv("PERLIO_DEBUG");
397 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
404 /* Use fixed buffer as sv_catpvf etc. needs SVs */
408 s = CopFILE(PL_curcop);
411 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
412 len = strlen(buffer);
413 vsprintf(buffer+len, fmt, ap);
414 PerlLIO_write(dbg, buffer, strlen(buffer));
416 SV *sv = newSVpvn("", 0);
419 s = CopFILE(PL_curcop);
422 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
423 (IV) CopLINE(PL_curcop));
424 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
427 PerlLIO_write(dbg, s, len);
434 /*--------------------------------------------------------------------------------------*/
437 * Inner level routines
441 * Table of pointers to the PerlIO structs (malloc'ed)
443 #define PERLIO_TABLE_SIZE 64
446 PerlIO_allocate(pTHX)
449 * Find a free slot in the table, allocating new table as necessary
454 while ((f = *last)) {
456 last = (PerlIO **) (f);
457 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
463 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
471 #undef PerlIO_fdupopen
473 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
475 if (PerlIOValid(f)) {
476 PerlIO_funcs *tab = PerlIOBase(f)->tab;
478 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
479 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
483 SETERRNO(EBADF, SS$_IVCHAN);
489 PerlIO_cleantable(pTHX_ PerlIO **tablep)
491 PerlIO *table = *tablep;
494 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
495 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
496 PerlIO *f = table + i;
508 PerlIO_list_alloc(pTHX)
511 Newz('L', list, 1, PerlIO_list_t);
517 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
520 if (--list->refcnt == 0) {
523 for (i = 0; i < list->cur; i++) {
524 if (list->array[i].arg)
525 SvREFCNT_dec(list->array[i].arg);
527 Safefree(list->array);
535 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
538 if (list->cur >= list->len) {
541 Renew(list->array, list->len, PerlIO_pair_t);
543 New('l', list->array, list->len, PerlIO_pair_t);
545 p = &(list->array[list->cur++]);
547 if ((p->arg = arg)) {
553 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
555 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
558 list = PerlIO_list_alloc(aTHX);
559 for (i=0; i < proto->cur; i++) {
561 if (proto->array[i].arg)
562 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
563 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
570 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
573 PerlIO **table = &proto->Iperlio;
576 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
577 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
578 PerlIO_allocate(aTHX); /* root slot is never used */
579 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
580 while ((f = *table)) {
582 table = (PerlIO **) (f++);
583 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
585 (void) fp_dup(f, 0, param);
594 PerlIO_destruct(pTHX)
596 PerlIO **table = &PL_perlio;
599 PerlIO_debug("Destruct %p\n",aTHX);
601 while ((f = *table)) {
603 table = (PerlIO **) (f++);
604 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
608 if (l->tab->kind & PERLIO_K_DESTRUCT) {
609 PerlIO_debug("Destruct popping %s\n", l->tab->name);
623 PerlIO_pop(pTHX_ PerlIO *f)
627 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
628 if (l->tab->Popped) {
630 * If popped returns non-zero do not free its layer structure
631 * it has either done so itself, or it is shared and still in
634 if ((*l->tab->Popped) (aTHX_ f) != 0)
642 /*--------------------------------------------------------------------------------------*/
644 * XS Interface for perl code
648 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
651 if ((SSize_t) len <= 0)
653 for (i = 0; i < PL_known_layers->cur; i++) {
654 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
655 if (memEQ(f->name, name, len)) {
656 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
660 if (load && PL_subname && PL_def_layerlist
661 && PL_def_layerlist->cur >= 2) {
662 SV *pkgsv = newSVpvn("PerlIO", 6);
663 SV *layer = newSVpvn(name, len);
666 * The two SVs are magically freed by load_module
668 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
670 return PerlIO_find_layer(aTHX_ name, len, 0);
672 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
676 #ifdef USE_ATTRIBUTES_FOR_PERLIO
679 perlio_mg_set(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_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
691 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
694 IO *io = GvIOn((GV *) SvRV(sv));
695 PerlIO *ifp = IoIFP(io);
696 PerlIO *ofp = IoOFP(io);
697 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
703 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
705 Perl_warn(aTHX_ "clear %" SVf, sv);
710 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
712 Perl_warn(aTHX_ "free %" SVf, sv);
716 MGVTBL perlio_vtab = {
724 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
727 SV *sv = SvRV(ST(1));
732 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
734 mg = mg_find(sv, PERL_MAGIC_ext);
735 mg->mg_virtual = &perlio_vtab;
737 Perl_warn(aTHX_ "attrib %" SVf, sv);
738 for (i = 2; i < items; i++) {
740 const char *name = SvPV(ST(i), len);
741 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
743 av_push(av, SvREFCNT_inc(layer));
754 #endif /* USE_ATTIBUTES_FOR_PERLIO */
757 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
759 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
760 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
764 XS(XS_PerlIO__Layer__find)
768 Perl_croak(aTHX_ "Usage class->find(name[,load])");
771 char *name = SvPV(ST(1), len);
772 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
773 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
775 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
782 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
784 if (!PL_known_layers)
785 PL_known_layers = PerlIO_list_alloc(aTHX);
786 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
787 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
791 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
794 const char *s = names;
796 while (isSPACE(*s) || *s == ':')
801 const char *as = Nullch;
803 if (!isIDFIRST(*s)) {
805 * Message is consistent with how attribute lists are
806 * passed. Even though this means "foo : : bar" is
807 * seen as an invalid separator character.
809 char q = ((*s == '\'') ? '"' : '\'');
810 if (ckWARN(WARN_LAYER))
811 Perl_warner(aTHX_ packWARN(WARN_LAYER),
812 "perlio: invalid separator character %c%c%c in layer specification list %s",
814 SETERRNO(EINVAL, LIB$_INVARG);
819 } while (isALNUM(*e));
835 * It's a nul terminated string, not allowed
836 * to \ the terminating null. Anything other
837 * character is passed over.
847 if (ckWARN(WARN_LAYER))
848 Perl_warner(aTHX_ packWARN(WARN_LAYER),
849 "perlio: argument list not closed for layer \"%.*s\"",
861 bool warn_layer = ckWARN(WARN_LAYER);
862 PerlIO_funcs *layer =
863 PerlIO_find_layer(aTHX_ s, llen, 1);
865 PerlIO_list_push(aTHX_ av, layer,
872 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
885 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
887 PerlIO_funcs *tab = &PerlIO_perlio;
888 #ifdef PERLIO_USING_CRLF
891 if (PerlIO_stdio.Set_ptrcnt)
894 PerlIO_debug("Pushing %s\n", tab->name);
895 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
900 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
902 return av->array[n].arg;
906 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
908 if (n >= 0 && n < av->cur) {
909 PerlIO_debug("Layer %" IVdf " is %s\n", n,
910 av->array[n].funcs->name);
911 return av->array[n].funcs;
914 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
919 PerlIO_default_layers(pTHX)
921 if (!PL_def_layerlist) {
922 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
923 PerlIO_funcs *osLayer = &PerlIO_unix;
924 PL_def_layerlist = PerlIO_list_alloc(aTHX);
925 PerlIO_define_layer(aTHX_ & PerlIO_unix);
926 #if defined(WIN32) && !defined(UNDER_CE)
927 PerlIO_define_layer(aTHX_ & PerlIO_win32);
929 osLayer = &PerlIO_win32;
932 PerlIO_define_layer(aTHX_ & PerlIO_raw);
933 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
934 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
935 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
937 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
939 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
940 PerlIO_define_layer(aTHX_ & PerlIO_byte);
941 PerlIO_list_push(aTHX_ PL_def_layerlist,
942 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
945 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
948 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
951 if (PL_def_layerlist->cur < 2) {
952 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
954 return PL_def_layerlist;
958 Perl_boot_core_PerlIO(pTHX)
960 #ifdef USE_ATTRIBUTES_FOR_PERLIO
961 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
964 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
968 PerlIO_default_layer(pTHX_ I32 n)
970 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
973 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
976 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
977 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
980 PerlIO_stdstreams(pTHX)
983 PerlIO_allocate(aTHX);
984 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
985 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
986 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
991 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
994 Newc('L',l,tab->size,char,PerlIOl);
996 Zero(l, tab->size, char);
1000 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1001 (mode) ? mode : "(Null)", (void*)arg);
1002 if ((*l->tab->Pushed) (aTHX_ f, mode, arg) != 0) {
1003 PerlIO_pop(aTHX_ f);
1011 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1013 PerlIO_pop(aTHX_ f);
1016 PerlIO_pop(aTHX_ f);
1023 PerlIOBase_binmode(pTHX_ PerlIO *f)
1025 if (PerlIOValid(f)) {
1026 /* Is layer suitable for raw stream ? */
1027 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1028 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1029 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1032 /* Not suitable - pop it */
1033 PerlIO_pop(aTHX_ f);
1041 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1044 if (PerlIOValid(f)) {
1047 PerlIO_pop(aTHX_ f); /* Remove the dummy layer */
1050 * Strip all layers that are not suitable for a raw stream
1053 while (t && (l = *t)) {
1054 if (l->tab->Binmode) {
1055 /* Has a handler - normal case */
1056 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1058 /* Layer still there - move down a layer */
1067 /* No handler - pop it */
1068 PerlIO_pop(aTHX_ t);
1071 if (PerlIOValid(f)) {
1072 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1080 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1081 PerlIO_list_t *layers, IV n, IV max)
1085 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1087 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1098 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1102 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1103 code = PerlIO_parse_layers(aTHX_ layers, names);
1105 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1107 PerlIO_list_free(aTHX_ layers);
1113 /*--------------------------------------------------------------------------------------*/
1115 * Given the abstraction above the public API functions
1119 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1121 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1122 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1123 (names) ? names : "(Null)");
1125 /* Do not flush etc. if (e.g.) switching encodings.
1126 if a pushed layer knows it needs to flush lower layers
1127 (for example :unix which is never going to call them)
1128 it can do the flush when it is pushed.
1130 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1133 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1134 #ifdef PERLIO_USING_CRLF
1135 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1136 O_BINARY so we can look for it in mode.
1138 if (!(mode & O_BINARY)) {
1140 /* FIXME?: Looking down the layer stack seems wrong,
1141 but is a way of reaching past (say) an encoding layer
1142 to flip CRLF-ness of the layer(s) below
1145 /* Perhaps we should turn on bottom-most aware layer
1146 e.g. Ilya's idea that UNIX TTY could serve
1148 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1149 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1150 /* Not in text mode - flush any pending stuff and flip it */
1152 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1154 /* Only need to turn it on in one layer so we are done */
1159 /* Not finding a CRLF aware layer presumably means we are binary
1160 which is not what was requested - so we failed
1161 We _could_ push :crlf layer but so could caller
1166 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1167 So code that used to be here is now in PerlIORaw_pushed().
1169 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1174 PerlIO__close(pTHX_ PerlIO *f)
1177 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1179 SETERRNO(EBADF, SS$_IVCHAN);
1185 Perl_PerlIO_close(pTHX_ PerlIO *f)
1188 if (PerlIOValid(f)) {
1189 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1191 PerlIO_pop(aTHX_ f);
1198 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1201 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1203 SETERRNO(EBADF, SS$_IVCHAN);
1209 PerlIO_context_layers(pTHX_ const char *mode)
1211 const char *type = NULL;
1213 * Need to supply default layer info from open.pm
1216 SV *layers = PL_curcop->cop_io;
1219 type = SvPV(layers, len);
1220 if (type && mode[0] != 'r') {
1222 * Skip to write part
1224 const char *s = strchr(type, 0);
1225 if (s && (STRLEN)(s - type) < len) {
1234 static PerlIO_funcs *
1235 PerlIO_layer_from_ref(pTHX_ SV *sv)
1238 * For any scalar type load the handler which is bundled with perl
1240 if (SvTYPE(sv) < SVt_PVAV)
1241 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1244 * For other types allow if layer is known but don't try and load it
1246 switch (SvTYPE(sv)) {
1248 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1250 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1252 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1254 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1260 PerlIO_resolve_layers(pTHX_ const char *layers,
1261 const char *mode, int narg, SV **args)
1263 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1266 PerlIO_stdstreams(aTHX);
1270 * If it is a reference but not an object see if we have a handler
1273 if (SvROK(arg) && !sv_isobject(arg)) {
1274 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1276 def = PerlIO_list_alloc(aTHX);
1277 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1281 * Don't fail if handler cannot be found :Via(...) etc. may do
1282 * something sensible else we will just stringfy and open
1288 layers = PerlIO_context_layers(aTHX_ mode);
1289 if (layers && *layers) {
1293 av = PerlIO_list_alloc(aTHX);
1294 for (i = 0; i < def->cur; i++) {
1295 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1302 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1306 PerlIO_list_free(aTHX_ av);
1307 return (PerlIO_list_t *) NULL;
1318 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1319 int imode, int perm, PerlIO *f, int narg, SV **args)
1321 if (!f && narg == 1 && *args == &PL_sv_undef) {
1322 if ((f = PerlIO_tmpfile())) {
1324 layers = PerlIO_context_layers(aTHX_ mode);
1325 if (layers && *layers)
1326 PerlIO_apply_layers(aTHX_ f, mode, layers);
1330 PerlIO_list_t *layera = NULL;
1332 PerlIO_funcs *tab = NULL;
1333 if (PerlIOValid(f)) {
1335 * This is "reopen" - it is not tested as perl does not use it
1339 layera = PerlIO_list_alloc(aTHX);
1341 SV *arg = (l->tab->Getarg)
1342 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1344 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1345 l = *PerlIONext(&l);
1349 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1355 * Start at "top" of layer stack
1357 n = layera->cur - 1;
1359 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1368 * Found that layer 'n' can do opens - call it
1370 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1371 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1373 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1374 tab->name, layers, mode, fd, imode, perm,
1375 (void*)f, narg, (void*)args);
1376 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1379 if (n + 1 < layera->cur) {
1381 * More layers above the one that we used to open -
1384 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1385 /* If pushing layers fails close the file */
1392 PerlIO_list_free(aTHX_ layera);
1399 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1402 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1404 SETERRNO(EBADF, SS$_IVCHAN);
1410 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1413 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1415 SETERRNO(EBADF, SS$_IVCHAN);
1421 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1424 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1426 SETERRNO(EBADF, SS$_IVCHAN);
1432 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1435 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1437 SETERRNO(EBADF, SS$_IVCHAN);
1443 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1446 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1448 SETERRNO(EBADF, SS$_IVCHAN);
1454 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1458 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1459 if (tab && tab->Flush) {
1460 return (*tab->Flush) (aTHX_ f);
1463 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1464 SETERRNO(EBADF, SS$_IVCHAN);
1469 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1470 SETERRNO(EBADF, SS$_IVCHAN);
1476 * Is it good API design to do flush-all on NULL, a potentially
1477 * errorneous input? Maybe some magical value (PerlIO*
1478 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1479 * things on fflush(NULL), but should we be bound by their design
1482 PerlIO **table = &PL_perlio;
1484 while ((f = *table)) {
1486 table = (PerlIO **) (f++);
1487 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1488 if (*f && PerlIO_flush(f) != 0)
1498 PerlIOBase_flush_linebuf(pTHX)
1500 PerlIO **table = &PL_perlio;
1502 while ((f = *table)) {
1504 table = (PerlIO **) (f++);
1505 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1508 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1509 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1517 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1520 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1522 SETERRNO(EBADF, SS$_IVCHAN);
1528 PerlIO_isutf8(PerlIO *f)
1531 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1533 SETERRNO(EBADF, SS$_IVCHAN);
1539 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1542 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1544 SETERRNO(EBADF, SS$_IVCHAN);
1550 Perl_PerlIO_error(pTHX_ PerlIO *f)
1553 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1555 SETERRNO(EBADF, SS$_IVCHAN);
1561 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1564 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1566 SETERRNO(EBADF, SS$_IVCHAN);
1570 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1573 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1575 SETERRNO(EBADF, SS$_IVCHAN);
1579 PerlIO_has_base(PerlIO *f)
1581 if (PerlIOValid(f)) {
1582 return (PerlIOBase(f)->tab->Get_base != NULL);
1588 PerlIO_fast_gets(PerlIO *f)
1590 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1591 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1592 return (tab->Set_ptrcnt != NULL);
1598 PerlIO_has_cntptr(PerlIO *f)
1600 if (PerlIOValid(f)) {
1601 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1602 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1608 PerlIO_canset_cnt(PerlIO *f)
1610 if (PerlIOValid(f)) {
1611 PerlIOl *l = PerlIOBase(f);
1612 return (l->tab->Set_ptrcnt != NULL);
1618 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1621 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1626 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1629 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1634 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1636 if (PerlIOValid(f)) {
1637 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1638 if (tab->Get_ptr == NULL)
1640 return (*tab->Get_ptr) (aTHX_ f);
1646 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1648 if (PerlIOValid(f)) {
1649 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1650 if (tab->Get_cnt == NULL)
1652 return (*tab->Get_cnt) (aTHX_ f);
1658 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1660 if (PerlIOValid(f)) {
1661 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1666 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1668 if (PerlIOValid(f)) {
1669 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1670 if (tab->Set_ptrcnt == NULL) {
1671 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1673 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1677 /*--------------------------------------------------------------------------------------*/
1679 * utf8 and raw dummy layers
1683 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1685 if (*PerlIONext(f)) {
1686 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1687 PerlIO_pop(aTHX_ f);
1688 if (tab->kind & PERLIO_K_UTF8)
1689 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1691 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1697 PerlIO_funcs PerlIO_utf8 = {
1700 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1718 NULL, /* get_base */
1719 NULL, /* get_bufsiz */
1722 NULL, /* set_ptrcnt */
1725 PerlIO_funcs PerlIO_byte = {
1746 NULL, /* get_base */
1747 NULL, /* get_bufsiz */
1750 NULL, /* set_ptrcnt */
1754 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1755 IV n, const char *mode, int fd, int imode, int perm,
1756 PerlIO *old, int narg, SV **args)
1758 PerlIO_funcs *tab = PerlIO_default_btm();
1759 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1763 PerlIO_funcs PerlIO_raw = {
1784 NULL, /* get_base */
1785 NULL, /* get_bufsiz */
1788 NULL, /* set_ptrcnt */
1790 /*--------------------------------------------------------------------------------------*/
1791 /*--------------------------------------------------------------------------------------*/
1793 * "Methods" of the "base class"
1797 PerlIOBase_fileno(pTHX_ PerlIO *f)
1799 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1803 PerlIO_modestr(PerlIO *f, char *buf)
1806 IV flags = PerlIOBase(f)->flags;
1807 if (flags & PERLIO_F_APPEND) {
1809 if (flags & PERLIO_F_CANREAD) {
1813 else if (flags & PERLIO_F_CANREAD) {
1815 if (flags & PERLIO_F_CANWRITE)
1818 else if (flags & PERLIO_F_CANWRITE) {
1820 if (flags & PERLIO_F_CANREAD) {
1824 #ifdef PERLIO_USING_CRLF
1825 if (!(flags & PERLIO_F_CRLF))
1833 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
1835 PerlIOl *l = PerlIOBase(f);
1837 const char *omode = mode;
1840 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1841 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1842 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1843 if (tab->Set_ptrcnt != NULL)
1844 l->flags |= PERLIO_F_FASTGETS;
1846 if (*mode == '#' || *mode == 'I')
1850 l->flags |= PERLIO_F_CANREAD;
1853 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1856 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1859 SETERRNO(EINVAL, LIB$_INVARG);
1865 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1868 l->flags &= ~PERLIO_F_CRLF;
1871 l->flags |= PERLIO_F_CRLF;
1874 SETERRNO(EINVAL, LIB$_INVARG);
1881 l->flags |= l->next->flags &
1882 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1887 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1888 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1889 l->flags, PerlIO_modestr(f, temp));
1895 PerlIOBase_popped(pTHX_ PerlIO *f)
1901 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1904 * Save the position as current head considers it
1906 Off_t old = PerlIO_tell(f);
1908 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1909 PerlIOSelf(f, PerlIOBuf)->posn = old;
1910 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1915 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1917 STDCHAR *buf = (STDCHAR *) vbuf;
1919 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1922 SSize_t avail = PerlIO_get_cnt(f);
1925 take = ((SSize_t)count < avail) ? count : avail;
1927 STDCHAR *ptr = PerlIO_get_ptr(f);
1928 Copy(ptr, buf, take, STDCHAR);
1929 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1933 if (count > 0 && avail <= 0) {
1934 if (PerlIO_fill(f) != 0)
1938 return (buf - (STDCHAR *) vbuf);
1944 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1950 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1956 PerlIOBase_close(pTHX_ PerlIO *f)
1959 PerlIO *n = PerlIONext(f);
1960 if (PerlIO_flush(f) != 0)
1962 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1964 PerlIOBase(f)->flags &=
1965 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1970 PerlIOBase_eof(pTHX_ PerlIO *f)
1972 if (PerlIOValid(f)) {
1973 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1979 PerlIOBase_error(pTHX_ PerlIO *f)
1981 if (PerlIOValid(f)) {
1982 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
1988 PerlIOBase_clearerr(pTHX_ PerlIO *f)
1990 if (PerlIOValid(f)) {
1991 PerlIO *n = PerlIONext(f);
1992 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
1999 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2001 if (PerlIOValid(f)) {
2002 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2007 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2013 return sv_dup(arg, param);
2016 return newSVsv(arg);
2019 return newSVsv(arg);
2024 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2026 PerlIO *nexto = PerlIONext(o);
2027 if (PerlIOValid(nexto)) {
2028 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2029 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2032 PerlIO_funcs *self = PerlIOBase(o)->tab;
2035 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2036 self->name, (void*)f, (void*)o, (void*)param);
2038 arg = (*self->Getarg)(aTHX_ o,param,flags);
2040 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2048 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2050 perl_mutex PerlIO_mutex;
2052 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2057 /* Place holder for stdstreams call ??? */
2059 MUTEX_INIT(&PerlIO_mutex);
2064 PerlIOUnix_refcnt_inc(int fd)
2066 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2068 MUTEX_LOCK(&PerlIO_mutex);
2070 PerlIO_fd_refcnt[fd]++;
2071 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2073 MUTEX_UNLOCK(&PerlIO_mutex);
2079 PerlIOUnix_refcnt_dec(int fd)
2082 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2084 MUTEX_LOCK(&PerlIO_mutex);
2086 cnt = --PerlIO_fd_refcnt[fd];
2087 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2089 MUTEX_UNLOCK(&PerlIO_mutex);
2096 PerlIO_cleanup(pTHX)
2100 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2102 PerlIO_debug("Cleanup layers\n");
2104 /* Raise STDIN..STDERR refcount so we don't close them */
2105 for (i=0; i < 3; i++)
2106 PerlIOUnix_refcnt_inc(i);
2107 PerlIO_cleantable(aTHX_ &PL_perlio);
2108 /* Restore STDIN..STDERR refcount */
2109 for (i=0; i < 3; i++)
2110 PerlIOUnix_refcnt_dec(i);
2112 if (PL_known_layers) {
2113 PerlIO_list_free(aTHX_ PL_known_layers);
2114 PL_known_layers = NULL;
2116 if(PL_def_layerlist) {
2117 PerlIO_list_free(aTHX_ PL_def_layerlist);
2118 PL_def_layerlist = NULL;
2124 /*--------------------------------------------------------------------------------------*/
2126 * Bottom-most level for UNIX-like case
2130 struct _PerlIO base; /* The generic part */
2131 int fd; /* UNIX like file descriptor */
2132 int oflags; /* open/fcntl flags */
2136 PerlIOUnix_oflags(const char *mode)
2139 if (*mode == 'I' || *mode == '#')
2144 if (*++mode == '+') {
2151 oflags = O_CREAT | O_TRUNC;
2152 if (*++mode == '+') {
2161 oflags = O_CREAT | O_APPEND;
2162 if (*++mode == '+') {
2175 else if (*mode == 't') {
2177 oflags &= ~O_BINARY;
2181 * Always open in binary mode
2184 if (*mode || oflags == -1) {
2185 SETERRNO(EINVAL, LIB$_INVARG);
2192 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2194 return PerlIOSelf(f, PerlIOUnix)->fd;
2198 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2200 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
2201 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2202 if (*PerlIONext(f)) {
2203 /* We never call down so do any pending stuff now */
2204 PerlIO_flush(PerlIONext(f));
2205 s->fd = PerlIO_fileno(PerlIONext(f));
2207 * XXX could (or should) we retrieve the oflags from the open file
2208 * handle rather than believing the "mode" we are passed in? XXX
2209 * Should the value on NULL mode be 0 or -1?
2211 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2213 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2218 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2219 IV n, const char *mode, int fd, int imode,
2220 int perm, PerlIO *f, int narg, SV **args)
2222 if (PerlIOValid(f)) {
2223 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2224 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2227 char *path = SvPV_nolen(*args);
2231 imode = PerlIOUnix_oflags(mode);
2235 fd = PerlLIO_open3(path, imode, perm);
2243 f = PerlIO_allocate(aTHX);
2245 if (!PerlIOValid(f)) {
2246 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg),
2250 s = PerlIOSelf(f, PerlIOUnix);
2254 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2255 PerlIOUnix_refcnt_inc(fd);
2261 * FIXME: pop layers ???
2269 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2271 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2273 if (flags & PERLIO_DUP_FD) {
2274 fd = PerlLIO_dup(fd);
2276 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2277 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2279 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2280 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2282 PerlIOUnix_refcnt_inc(fd);
2291 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2293 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2294 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2297 SSize_t len = PerlLIO_read(fd, vbuf, count);
2298 if (len >= 0 || errno != EINTR) {
2300 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2301 else if (len == 0 && count != 0)
2302 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2310 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2312 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2314 SSize_t len = PerlLIO_write(fd, vbuf, count);
2315 if (len >= 0 || errno != EINTR) {
2317 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2325 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2328 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2329 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2330 return (new == (Off_t) - 1) ? -1 : 0;
2334 PerlIOUnix_tell(pTHX_ PerlIO *f)
2336 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2341 PerlIOUnix_close(pTHX_ PerlIO *f)
2343 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2345 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2346 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2347 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2352 SETERRNO(EBADF,SS$_IVCHAN);
2355 while (PerlLIO_close(fd) != 0) {
2356 if (errno != EINTR) {
2363 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2368 PerlIO_funcs PerlIO_unix = {
2375 PerlIOBase_binmode, /* binmode */
2385 PerlIOBase_noop_ok, /* flush */
2386 PerlIOBase_noop_fail, /* fill */
2389 PerlIOBase_clearerr,
2390 PerlIOBase_setlinebuf,
2391 NULL, /* get_base */
2392 NULL, /* get_bufsiz */
2395 NULL, /* set_ptrcnt */
2398 /*--------------------------------------------------------------------------------------*/
2403 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2404 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2405 broken by the last second glibc 2.3 fix
2407 #define STDIO_BUFFER_WRITABLE
2412 struct _PerlIO base;
2413 FILE *stdio; /* The stream */
2417 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2419 return PerlSIO_fileno(PerlIOSelf(f, PerlIOStdio)->stdio);
2423 PerlIOStdio_mode(const char *mode, char *tmode)
2429 #ifdef PERLIO_USING_CRLF
2437 * This isn't used yet ...
2440 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
2442 if (*PerlIONext(f)) {
2443 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2446 PerlSIO_fdopen(PerlIO_fileno(PerlIONext(f)), mode =
2447 PerlIOStdio_mode(mode, tmode));
2450 /* We never call down so do any pending stuff now */
2451 PerlIO_flush(PerlIONext(f));
2456 return PerlIOBase_pushed(aTHX_ f, mode, arg);
2461 PerlIO_importFILE(FILE *stdio, const char *mode)
2467 if (!mode || !*mode) {
2468 /* We need to probe to see how we can open the stream
2469 so start with read/write and then try write and read
2470 we dup() so that we can fclose without loosing the fd.
2472 Note that the errno value set by a failing fdopen
2473 varies between stdio implementations.
2475 int fd = PerlLIO_dup(fileno(stdio));
2476 FILE *f2 = fdopen(fd, (mode = "r+"));
2478 f2 = fdopen(fd, (mode = "w"));
2481 f2 = fdopen(fd, (mode = "r"));
2484 /* Don't seem to be able to open */
2490 s = PerlIOSelf(PerlIO_push
2491 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
2492 mode, Nullsv), PerlIOStdio);
2499 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2500 IV n, const char *mode, int fd, int imode,
2501 int perm, PerlIO *f, int narg, SV **args)
2504 if (PerlIOValid(f)) {
2505 char *path = SvPV_nolen(*args);
2506 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2508 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2509 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2514 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2519 char *path = SvPV_nolen(*args);
2522 fd = PerlLIO_open3(path, imode, perm);
2525 FILE *stdio = PerlSIO_fopen(path, mode);
2529 f = PerlIO_allocate(aTHX);
2531 s = PerlIOSelf(PerlIO_push(aTHX_ f, self,
2532 (mode = PerlIOStdio_mode(mode, tmode)),
2536 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2551 stdio = PerlSIO_stdin;
2554 stdio = PerlSIO_stdout;
2557 stdio = PerlSIO_stderr;
2562 stdio = PerlSIO_fdopen(fd, mode =
2563 PerlIOStdio_mode(mode, tmode));
2568 f = PerlIO_allocate(aTHX);
2570 s = PerlIOSelf(PerlIO_push(aTHX_ f, self, mode, PerlIOArg), PerlIOStdio);
2572 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2581 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2583 /* This assumes no layers underneath - which is what
2584 happens, but is not how I remember it. NI-S 2001/10/16
2586 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2587 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2588 if (flags & PERLIO_DUP_FD) {
2589 int fd = PerlLIO_dup(fileno(stdio));
2592 stdio = fdopen(fd, PerlIO_modestr(o,mode));
2595 /* FIXME: To avoid messy error recovery if dup fails
2596 re-use the existing stdio as though flag was not set
2600 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2601 PerlIOUnix_refcnt_inc(fileno(stdio));
2607 PerlIOStdio_close(pTHX_ PerlIO *f)
2609 #ifdef SOCKS5_VERSION_NAME
2611 Sock_size_t optlen = sizeof(int);
2613 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2614 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2615 /* Do not close it but do flush any buffers */
2616 return PerlIO_flush(f);
2619 #ifdef SOCKS5_VERSION_NAME
2621 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2623 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2625 PerlSIO_fclose(stdio)
2634 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2636 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2639 STDCHAR *buf = (STDCHAR *) vbuf;
2641 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2642 * stdio does not do that for fread()
2644 int ch = PerlSIO_fgetc(s);
2651 got = PerlSIO_fread(vbuf, 1, count, s);
2656 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2659 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2661 #ifdef STDIO_BUFFER_WRITABLE
2662 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2663 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2664 STDCHAR *base = PerlIO_get_base(f);
2665 SSize_t cnt = PerlIO_get_cnt(f);
2666 STDCHAR *ptr = PerlIO_get_ptr(f);
2667 SSize_t avail = ptr - base;
2669 if (avail > count) {
2673 Move(buf-avail,ptr,avail,STDCHAR);
2676 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2677 if (PerlSIO_feof(s) && unread >= 0)
2678 PerlSIO_clearerr(s);
2683 if (PerlIO_has_cntptr(f)) {
2684 /* We can get pointer to buffer but not its base
2685 Do ungetc() but check chars are ending up in the
2688 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2689 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2691 int ch = *--buf & 0xFF;
2692 if (ungetc(ch,s) != ch) {
2693 /* ungetc did not work */
2696 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2697 /* Did not change pointer as expected */
2698 fgetc(s); /* get char back again */
2708 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2714 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2716 return PerlSIO_fwrite(vbuf, 1, count,
2717 PerlIOSelf(f, PerlIOStdio)->stdio);
2721 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2723 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2724 return PerlSIO_fseek(stdio, offset, whence);
2728 PerlIOStdio_tell(pTHX_ PerlIO *f)
2730 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2731 return PerlSIO_ftell(stdio);
2735 PerlIOStdio_flush(pTHX_ PerlIO *f)
2737 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2738 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2739 return PerlSIO_fflush(stdio);
2744 * FIXME: This discards ungetc() and pre-read stuff which is not
2745 * right if this is just a "sync" from a layer above Suspect right
2746 * design is to do _this_ but not have layer above flush this
2747 * layer read-to-read
2750 * Not writeable - sync by attempting a seek
2753 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2761 PerlIOStdio_eof(pTHX_ PerlIO *f)
2763 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2767 PerlIOStdio_error(pTHX_ PerlIO *f)
2769 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2773 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2775 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2779 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2781 #ifdef HAS_SETLINEBUF
2782 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2784 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2790 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2792 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2793 return (STDCHAR*)PerlSIO_get_base(stdio);
2797 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2799 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2800 return PerlSIO_get_bufsiz(stdio);
2804 #ifdef USE_STDIO_PTR
2806 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2808 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2809 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2813 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2815 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2816 return PerlSIO_get_cnt(stdio);
2820 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2822 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2824 #ifdef STDIO_PTR_LVALUE
2825 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2826 #ifdef STDIO_PTR_LVAL_SETS_CNT
2827 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2828 assert(PerlSIO_get_cnt(stdio) == (cnt));
2831 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2833 * Setting ptr _does_ change cnt - we are done
2837 #else /* STDIO_PTR_LVALUE */
2839 #endif /* STDIO_PTR_LVALUE */
2842 * Now (or only) set cnt
2844 #ifdef STDIO_CNT_LVALUE
2845 PerlSIO_set_cnt(stdio, cnt);
2846 #else /* STDIO_CNT_LVALUE */
2847 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2848 PerlSIO_set_ptr(stdio,
2849 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2851 #else /* STDIO_PTR_LVAL_SETS_CNT */
2853 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2854 #endif /* STDIO_CNT_LVALUE */
2861 PerlIOStdio_fill(pTHX_ PerlIO *f)
2863 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2866 * fflush()ing read-only streams can cause trouble on some stdio-s
2868 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2869 if (PerlSIO_fflush(stdio) != 0)
2872 c = PerlSIO_fgetc(stdio);
2876 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2878 #ifdef STDIO_BUFFER_WRITABLE
2879 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2880 /* Fake ungetc() to the real buffer in case system's ungetc
2883 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2884 SSize_t cnt = PerlSIO_get_cnt(stdio);
2885 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2886 if (ptr == base+1) {
2887 *--ptr = (STDCHAR) c;
2888 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2889 if (PerlSIO_feof(stdio))
2890 PerlSIO_clearerr(stdio);
2896 if (PerlIO_has_cntptr(f)) {
2898 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2905 /* An ungetc()d char is handled separately from the regular
2906 * buffer, so we stuff it in the buffer ourselves.
2907 * Should never get called as should hit code above
2909 *(--((*stdio)->_ptr)) = (unsigned char) c;
2912 /* If buffer snoop scheme above fails fall back to
2915 if (PerlSIO_ungetc(c, stdio) != c)
2923 PerlIO_funcs PerlIO_stdio = {
2925 sizeof(PerlIOStdio),
2926 PERLIO_K_BUFFERED|PERLIO_K_RAW,
2930 PerlIOBase_binmode, /* binmode */
2944 PerlIOStdio_clearerr,
2945 PerlIOStdio_setlinebuf,
2947 PerlIOStdio_get_base,
2948 PerlIOStdio_get_bufsiz,
2953 #ifdef USE_STDIO_PTR
2954 PerlIOStdio_get_ptr,
2955 PerlIOStdio_get_cnt,
2956 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2957 PerlIOStdio_set_ptrcnt
2958 #else /* STDIO_PTR_LVALUE */
2960 #endif /* STDIO_PTR_LVALUE */
2961 #else /* USE_STDIO_PTR */
2965 #endif /* USE_STDIO_PTR */
2969 PerlIO_exportFILE(PerlIO *f, const char *mode)
2975 if (!mode || !*mode) {
2976 mode = PerlIO_modestr(f,buf);
2978 stdio = fdopen(PerlIO_fileno(f), mode);
2981 PerlIOSelf(PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv),
2989 PerlIO_findFILE(PerlIO *f)
2993 if (l->tab == &PerlIO_stdio) {
2994 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
2997 l = *PerlIONext(&l);
2999 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3000 return PerlIO_exportFILE(f, Nullch);
3004 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3008 if (l->tab == &PerlIO_stdio) {
3009 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3010 if (s->stdio == f) {
3012 PerlIO_pop(aTHX_ p);
3021 /*--------------------------------------------------------------------------------------*/
3023 * perlio buffer layer
3027 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3029 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3030 int fd = PerlIO_fileno(f);
3031 if (fd >= 0 && PerlLIO_isatty(fd)) {
3032 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3034 if (*PerlIONext(f)) {
3035 Off_t posn = PerlIO_tell(PerlIONext(f));
3036 if (posn != (Off_t) - 1) {
3040 return PerlIOBase_pushed(aTHX_ f, mode, arg);
3044 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3045 IV n, const char *mode, int fd, int imode, int perm,
3046 PerlIO *f, int narg, SV **args)
3048 if (PerlIOValid(f)) {
3049 PerlIO *next = PerlIONext(f);
3050 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3051 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3053 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg) != 0) {
3058 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3066 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3069 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3071 * if push fails during open, open fails. close will pop us.
3076 fd = PerlIO_fileno(f);
3077 if (init && fd == 2) {
3079 * Initial stderr is unbuffered
3081 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3083 #ifdef PERLIO_USING_CRLF
3084 # ifdef PERLIO_IS_BINMODE_FD
3085 if (PERLIO_IS_BINMODE_FD(fd))
3086 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3090 * do something about failing setmode()? --jhi
3092 PerlLIO_setmode(fd, O_BINARY);
3101 * This "flush" is akin to sfio's sync in that it handles files in either
3102 * read or write state
3105 PerlIOBuf_flush(pTHX_ PerlIO *f)
3107 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3109 PerlIO *n = PerlIONext(f);
3110 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3112 * write() the buffer
3114 STDCHAR *buf = b->buf;
3116 while (p < b->ptr) {
3117 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3121 else if (count < 0 || PerlIO_error(n)) {
3122 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3127 b->posn += (p - buf);
3129 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3130 STDCHAR *buf = PerlIO_get_base(f);
3132 * Note position change
3134 b->posn += (b->ptr - buf);
3135 if (b->ptr < b->end) {
3136 /* We did not consume all of it - try and seek downstream to
3137 our logical position
3139 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3140 /* Reload n as some layers may pop themselves on seek */
3141 b->posn = PerlIO_tell(n = PerlIONext(f));
3144 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3145 data is lost for good - so return saying "ok" having undone
3148 b->posn -= (b->ptr - buf);
3153 b->ptr = b->end = b->buf;
3154 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3155 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3156 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3162 PerlIOBuf_fill(pTHX_ PerlIO *f)
3164 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3165 PerlIO *n = PerlIONext(f);
3168 * Down-stream flush is defined not to loose read data so is harmless.
3169 * we would not normally be fill'ing if there was data left in anycase.
3171 if (PerlIO_flush(f) != 0)
3173 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3174 PerlIOBase_flush_linebuf(aTHX);
3177 PerlIO_get_base(f); /* allocate via vtable */
3179 b->ptr = b->end = b->buf;
3181 if (!PerlIOValid(n)) {
3182 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3186 if (PerlIO_fast_gets(n)) {
3188 * Layer below is also buffered. We do _NOT_ want to call its
3189 * ->Read() because that will loop till it gets what we asked for
3190 * which may hang on a pipe etc. Instead take anything it has to
3191 * hand, or ask it to fill _once_.
3193 avail = PerlIO_get_cnt(n);
3195 avail = PerlIO_fill(n);
3197 avail = PerlIO_get_cnt(n);
3199 if (!PerlIO_error(n) && PerlIO_eof(n))
3204 STDCHAR *ptr = PerlIO_get_ptr(n);
3205 SSize_t cnt = avail;
3206 if (avail > (SSize_t)b->bufsiz)
3208 Copy(ptr, b->buf, avail, STDCHAR);
3209 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3213 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3217 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3219 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3222 b->end = b->buf + avail;
3223 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3228 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3230 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3231 if (PerlIOValid(f)) {
3234 return PerlIOBase_read(aTHX_ f, vbuf, count);
3240 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3242 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3243 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3246 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3251 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3253 * Buffer is already a read buffer, we can overwrite any chars
3254 * which have been read back to buffer start
3256 avail = (b->ptr - b->buf);
3260 * Buffer is idle, set it up so whole buffer is available for
3264 b->end = b->buf + avail;
3266 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3268 * Buffer extends _back_ from where we are now
3270 b->posn -= b->bufsiz;
3272 if (avail > (SSize_t) count) {
3274 * If we have space for more than count, just move count
3282 * In simple stdio-like ungetc() case chars will be already
3285 if (buf != b->ptr) {
3286 Copy(buf, b->ptr, avail, STDCHAR);
3290 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3294 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3300 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3302 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3303 const STDCHAR *buf = (const STDCHAR *) vbuf;
3307 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3310 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3311 if ((SSize_t) count < avail)
3313 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3314 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3329 Copy(buf, b->ptr, avail, STDCHAR);
3336 if (b->ptr >= (b->buf + b->bufsiz))
3339 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3345 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3348 if ((code = PerlIO_flush(f)) == 0) {
3349 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3350 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3351 code = PerlIO_seek(PerlIONext(f), offset, whence);
3353 b->posn = PerlIO_tell(PerlIONext(f));
3360 PerlIOBuf_tell(pTHX_ PerlIO *f)
3362 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3364 * b->posn is file position where b->buf was read, or will be written
3366 Off_t posn = b->posn;
3369 * If buffer is valid adjust position by amount in buffer
3371 posn += (b->ptr - b->buf);
3377 PerlIOBuf_popped(pTHX_ PerlIO *f)
3379 IV code = PerlIOBase_popped(aTHX_ f);
3380 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3381 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3385 b->ptr = b->end = b->buf;
3386 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3391 PerlIOBuf_close(pTHX_ PerlIO *f)
3393 IV code = PerlIOBase_close(aTHX_ f);
3394 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3395 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3399 b->ptr = b->end = b->buf;
3400 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3405 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3407 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3414 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3416 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3419 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3420 return (b->end - b->ptr);
3425 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3427 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3432 Newz('B',b->buf,b->bufsiz, STDCHAR);
3434 b->buf = (STDCHAR *) & b->oneword;
3435 b->bufsiz = sizeof(b->oneword);
3444 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3446 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3449 return (b->end - b->buf);
3453 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3455 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3459 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3460 assert(PerlIO_get_cnt(f) == cnt);
3461 assert(b->ptr >= b->buf);
3463 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3467 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3469 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3474 PerlIO_funcs PerlIO_perlio = {
3477 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3481 PerlIOBase_binmode, /* binmode */
3495 PerlIOBase_clearerr,
3496 PerlIOBase_setlinebuf,
3501 PerlIOBuf_set_ptrcnt,
3504 /*--------------------------------------------------------------------------------------*/
3506 * Temp layer to hold unread chars when cannot do it any other way
3510 PerlIOPending_fill(pTHX_ PerlIO *f)
3513 * Should never happen
3520 PerlIOPending_close(pTHX_ PerlIO *f)
3523 * A tad tricky - flush pops us, then we close new top
3526 return PerlIO_close(f);
3530 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3533 * A tad tricky - flush pops us, then we seek new top
3536 return PerlIO_seek(f, offset, whence);
3541 PerlIOPending_flush(pTHX_ PerlIO *f)
3543 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3544 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3548 PerlIO_pop(aTHX_ f);
3553 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3559 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3564 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3566 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg);
3567 PerlIOl *l = PerlIOBase(f);
3569 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3570 * etc. get muddled when it changes mid-string when we auto-pop.
3572 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3573 (PerlIOBase(PerlIONext(f))->
3574 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3579 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3581 SSize_t avail = PerlIO_get_cnt(f);
3583 if ((SSize_t)count < avail)
3586 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3587 if (got >= 0 && got < (SSize_t)count) {
3589 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3590 if (more >= 0 || got == 0)
3596 PerlIO_funcs PerlIO_pending = {
3599 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3600 PerlIOPending_pushed,
3603 PerlIOBase_binmode, /* binmode */
3612 PerlIOPending_close,
3613 PerlIOPending_flush,
3617 PerlIOBase_clearerr,
3618 PerlIOBase_setlinebuf,
3623 PerlIOPending_set_ptrcnt,
3628 /*--------------------------------------------------------------------------------------*/
3630 * crlf - translation On read translate CR,LF to "\n" we do this by
3631 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3632 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3636 PerlIOBuf base; /* PerlIOBuf stuff */
3637 STDCHAR *nl; /* Position of crlf we "lied" about in the
3642 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg)
3645 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3646 code = PerlIOBuf_pushed(aTHX_ f, mode, arg);
3648 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3649 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3650 PerlIOBase(f)->flags);
3657 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3659 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3664 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3665 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3667 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3668 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3670 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3675 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3676 b->end = b->ptr = b->buf + b->bufsiz;
3677 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3678 b->posn -= b->bufsiz;
3680 while (count > 0 && b->ptr > b->buf) {
3683 if (b->ptr - 2 >= b->buf) {
3706 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3708 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3711 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3712 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3713 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3714 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3716 while (nl < b->end && *nl != 0xd)
3718 if (nl < b->end && *nl == 0xd) {
3720 if (nl + 1 < b->end) {
3727 * Not CR,LF but just CR
3735 * Blast - found CR as last char in buffer
3740 * They may not care, defer work as long as
3744 return (nl - b->ptr);
3748 b->ptr++; /* say we have read it as far as
3749 * flush() is concerned */
3750 b->buf++; /* Leave space in front of buffer */
3751 b->bufsiz--; /* Buffer is thus smaller */
3752 code = PerlIO_fill(f); /* Fetch some more */
3753 b->bufsiz++; /* Restore size for next time */
3754 b->buf--; /* Point at space */
3755 b->ptr = nl = b->buf; /* Which is what we hand
3757 b->posn--; /* Buffer starts here */
3758 *nl = 0xd; /* Fill in the CR */
3760 goto test; /* fill() call worked */
3762 * CR at EOF - just fall through
3764 /* Should we clear EOF though ??? */
3769 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3775 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3777 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3778 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3784 if (ptr == b->end && *c->nl == 0xd) {
3785 /* Defered CR at end of buffer case - we lied about count */
3797 * Test code - delete when it works ...
3799 IV flags = PerlIOBase(f)->flags;
3800 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3801 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3802 /* Defered CR at end of buffer case - we lied about count */
3808 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3809 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3817 * They have taken what we lied about
3825 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3829 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3831 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3832 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3834 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3835 const STDCHAR *buf = (const STDCHAR *) vbuf;
3836 const STDCHAR *ebuf = buf + count;
3839 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3841 while (buf < ebuf) {
3842 STDCHAR *eptr = b->buf + b->bufsiz;
3843 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3844 while (buf < ebuf && b->ptr < eptr) {
3846 if ((b->ptr + 2) > eptr) {
3854 *(b->ptr)++ = 0xd; /* CR */
3855 *(b->ptr)++ = 0xa; /* LF */
3857 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3867 if (b->ptr >= eptr) {
3873 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3875 return (buf - (STDCHAR *) vbuf);
3880 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3882 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3887 return PerlIOBuf_flush(aTHX_ f);
3891 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
3893 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
3894 /* In text mode - flush any pending stuff and flip it */
3895 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
3896 #ifndef PERLIO_USING_CRLF
3897 /* CRLF is unusual case - if this is just the :crlf layer pop it */
3898 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
3899 PerlIO_pop(aTHX_ f);
3906 PerlIO_funcs PerlIO_crlf = {
3909 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
3911 PerlIOBuf_popped, /* popped */
3913 PerlIOCrlf_binmode, /* binmode */
3917 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3919 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3920 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3928 PerlIOBase_clearerr,
3929 PerlIOBase_setlinebuf,
3934 PerlIOCrlf_set_ptrcnt,
3938 /*--------------------------------------------------------------------------------------*/
3940 * mmap as "buffer" layer
3944 PerlIOBuf base; /* PerlIOBuf stuff */
3945 Mmap_t mptr; /* Mapped address */
3946 Size_t len; /* mapped length */
3947 STDCHAR *bbuf; /* malloced buffer if map fails */
3950 static size_t page_size = 0;
3953 PerlIOMmap_map(pTHX_ PerlIO *f)
3955 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3956 IV flags = PerlIOBase(f)->flags;
3960 if (flags & PERLIO_F_CANREAD) {
3961 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3962 int fd = PerlIO_fileno(f);
3964 code = Fstat(fd, &st);
3965 if (code == 0 && S_ISREG(st.st_mode)) {
3966 SSize_t len = st.st_size - b->posn;
3970 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
3972 SETERRNO(0, SS$_NORMAL);
3973 # ifdef _SC_PAGESIZE
3974 page_size = sysconf(_SC_PAGESIZE);
3976 page_size = sysconf(_SC_PAGE_SIZE);
3978 if ((long) page_size < 0) {
3983 (void) SvUPGRADE(error, SVt_PV);
3984 msg = SvPVx(error, n_a);
3985 Perl_croak(aTHX_ "panic: sysconf: %s",
3990 "panic: sysconf: pagesize unknown");
3994 # ifdef HAS_GETPAGESIZE
3995 page_size = getpagesize();
3997 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
3998 page_size = PAGESIZE; /* compiletime, bad */
4002 if ((IV) page_size <= 0)
4003 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4008 * This is a hack - should never happen - open should
4011 b->posn = PerlIO_tell(PerlIONext(f));
4013 posn = (b->posn / page_size) * page_size;
4014 len = st.st_size - posn;
4015 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4016 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4017 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4018 madvise(m->mptr, len, MADV_SEQUENTIAL);
4020 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4021 madvise(m->mptr, len, MADV_WILLNEED);
4023 PerlIOBase(f)->flags =
4024 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4025 b->end = ((STDCHAR *) m->mptr) + len;
4026 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4035 PerlIOBase(f)->flags =
4036 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4038 b->ptr = b->end = b->ptr;
4047 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4049 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4050 PerlIOBuf *b = &m->base;
4054 code = munmap(m->mptr, m->len);
4058 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4061 b->ptr = b->end = b->buf;
4062 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4068 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4070 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4071 PerlIOBuf *b = &m->base;
4072 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4074 * Already have a readbuffer in progress
4080 * We have a write buffer or flushed PerlIOBuf read buffer
4082 m->bbuf = b->buf; /* save it in case we need it again */
4083 b->buf = NULL; /* Clear to trigger below */
4086 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4089 * Map did not work - recover PerlIOBuf buffer if we have one
4094 b->ptr = b->end = b->buf;
4097 return PerlIOBuf_get_base(aTHX_ f);
4101 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4103 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4104 PerlIOBuf *b = &m->base;
4105 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4107 if (b->ptr && (b->ptr - count) >= b->buf
4108 && memEQ(b->ptr - count, vbuf, count)) {
4110 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4115 * Loose the unwritable mapped buffer
4119 * If flush took the "buffer" see if we have one from before
4121 if (!b->buf && m->bbuf)
4124 PerlIOBuf_get_base(aTHX_ f);
4128 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4132 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4134 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4135 PerlIOBuf *b = &m->base;
4136 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4138 * No, or wrong sort of, buffer
4141 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4145 * If unmap took the "buffer" see if we have one from before
4147 if (!b->buf && m->bbuf)
4150 PerlIOBuf_get_base(aTHX_ f);
4154 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4158 PerlIOMmap_flush(pTHX_ PerlIO *f)
4160 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4161 PerlIOBuf *b = &m->base;
4162 IV code = PerlIOBuf_flush(aTHX_ f);
4164 * Now we are "synced" at PerlIOBuf level
4171 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4176 * We seem to have a PerlIOBuf buffer which was not mapped
4177 * remember it in case we need one later
4186 PerlIOMmap_fill(pTHX_ PerlIO *f)
4188 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4189 IV code = PerlIO_flush(f);
4190 if (code == 0 && !b->buf) {
4191 code = PerlIOMmap_map(aTHX_ f);
4193 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4194 code = PerlIOBuf_fill(aTHX_ f);
4200 PerlIOMmap_close(pTHX_ PerlIO *f)
4202 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4203 PerlIOBuf *b = &m->base;
4204 IV code = PerlIO_flush(f);
4208 b->ptr = b->end = b->buf;
4210 if (PerlIOBuf_close(aTHX_ f) != 0)
4216 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4218 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4222 PerlIO_funcs PerlIO_mmap = {
4225 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4229 PerlIOBase_binmode, /* binmode */
4243 PerlIOBase_clearerr,
4244 PerlIOBase_setlinebuf,
4245 PerlIOMmap_get_base,
4249 PerlIOBuf_set_ptrcnt,
4252 #endif /* HAS_MMAP */
4255 Perl_PerlIO_stdin(pTHX)
4258 PerlIO_stdstreams(aTHX);
4260 return &PL_perlio[1];
4264 Perl_PerlIO_stdout(pTHX)
4267 PerlIO_stdstreams(aTHX);
4269 return &PL_perlio[2];
4273 Perl_PerlIO_stderr(pTHX)
4276 PerlIO_stdstreams(aTHX);
4278 return &PL_perlio[3];
4281 /*--------------------------------------------------------------------------------------*/
4284 PerlIO_getname(PerlIO *f, char *buf)
4289 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4291 name = fgetname(stdio, buf);
4293 Perl_croak(aTHX_ "Don't know how to get file name");
4299 /*--------------------------------------------------------------------------------------*/
4301 * Functions which can be called on any kind of PerlIO implemented in
4305 #undef PerlIO_fdopen
4307 PerlIO_fdopen(int fd, const char *mode)
4310 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4315 PerlIO_open(const char *path, const char *mode)
4318 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4319 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4322 #undef Perlio_reopen
4324 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4327 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4328 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4333 PerlIO_getc(PerlIO *f)
4337 SSize_t count = PerlIO_read(f, buf, 1);
4339 return (unsigned char) buf[0];
4344 #undef PerlIO_ungetc
4346 PerlIO_ungetc(PerlIO *f, int ch)
4351 if (PerlIO_unread(f, &buf, 1) == 1)
4359 PerlIO_putc(PerlIO *f, int ch)
4363 return PerlIO_write(f, &buf, 1);
4368 PerlIO_puts(PerlIO *f, const char *s)
4371 STRLEN len = strlen(s);
4372 return PerlIO_write(f, s, len);
4375 #undef PerlIO_rewind
4377 PerlIO_rewind(PerlIO *f)
4380 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4384 #undef PerlIO_vprintf
4386 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4389 SV *sv = newSVpvn("", 0);
4395 Perl_va_copy(ap, apc);
4396 sv_vcatpvf(sv, fmt, &apc);
4398 sv_vcatpvf(sv, fmt, &ap);
4401 wrote = PerlIO_write(f, s, len);
4406 #undef PerlIO_printf
4408 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4413 result = PerlIO_vprintf(f, fmt, ap);
4418 #undef PerlIO_stdoutf
4420 PerlIO_stdoutf(const char *fmt, ...)
4426 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4431 #undef PerlIO_tmpfile
4433 PerlIO_tmpfile(void)
4436 * I have no idea how portable mkstemp() is ...
4438 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4441 FILE *stdio = PerlSIO_tmpfile();
4444 PerlIOSelf(PerlIO_push
4445 (aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio,
4446 "w+", Nullsv), PerlIOStdio);
4452 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4453 int fd = mkstemp(SvPVX(sv));
4456 f = PerlIO_fdopen(fd, "w+");
4458 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4460 PerlLIO_unlink(SvPVX(sv));
4470 #endif /* USE_SFIO */
4471 #endif /* PERLIO_IS_STDIO */
4473 /*======================================================================================*/
4475 * Now some functions in terms of above which may be needed even if we are
4476 * not in true PerlIO mode
4480 #undef PerlIO_setpos
4482 PerlIO_setpos(PerlIO *f, SV *pos)
4487 Off_t *posn = (Off_t *) SvPV(pos, len);
4488 if (f && len == sizeof(Off_t))
4489 return PerlIO_seek(f, *posn, SEEK_SET);
4491 SETERRNO(EINVAL, SS$_IVCHAN);
4495 #undef PerlIO_setpos
4497 PerlIO_setpos(PerlIO *f, SV *pos)
4502 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4503 if (f && len == sizeof(Fpos_t)) {
4504 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4505 return fsetpos64(f, fpos);
4507 return fsetpos(f, fpos);
4511 SETERRNO(EINVAL, SS$_IVCHAN);
4517 #undef PerlIO_getpos
4519 PerlIO_getpos(PerlIO *f, SV *pos)
4522 Off_t posn = PerlIO_tell(f);
4523 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4524 return (posn == (Off_t) - 1) ? -1 : 0;
4527 #undef PerlIO_getpos
4529 PerlIO_getpos(PerlIO *f, SV *pos)
4534 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4535 code = fgetpos64(f, &fpos);
4537 code = fgetpos(f, &fpos);
4539 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4544 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4547 vprintf(char *pat, char *args)
4549 _doprnt(pat, args, stdout);
4550 return 0; /* wrong, but perl doesn't use the return
4555 vfprintf(FILE *fd, char *pat, char *args)
4557 _doprnt(pat, args, fd);
4558 return 0; /* wrong, but perl doesn't use the return
4564 #ifndef PerlIO_vsprintf
4566 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4568 int val = vsprintf(s, fmt, ap);
4570 if (strlen(s) >= (STRLEN) n) {
4572 (void) PerlIO_puts(Perl_error_log,
4573 "panic: sprintf overflow - memory corrupted!\n");
4581 #ifndef PerlIO_sprintf
4583 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4588 result = PerlIO_vsprintf(s, n, fmt, ap);