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);
340 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
342 PerlIO_importFILE(FILE *stdio, const char *mode)
344 int fd = fileno(stdio);
345 if (!mode || !*mode) {
348 return PerlIO_fdopen(fd, mode);
352 PerlIO_findFILE(PerlIO *pio)
354 int fd = PerlIO_fileno(pio);
355 FILE *f = fdopen(fd, "r+");
357 if (!f && errno == EINVAL)
359 if (!f && errno == EINVAL)
366 /*======================================================================================*/
368 * Implement all the PerlIO interface ourselves.
374 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
381 #include <sys/mman.h>
385 void PerlIO_debug(const char *fmt, ...)
386 __attribute__ ((format(__printf__, 1, 2)));
389 PerlIO_debug(const char *fmt, ...)
396 char *s = PerlEnv_getenv("PERLIO_DEBUG");
398 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
405 /* Use fixed buffer as sv_catpvf etc. needs SVs */
409 s = CopFILE(PL_curcop);
412 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
413 len = strlen(buffer);
414 vsprintf(buffer+len, fmt, ap);
415 PerlLIO_write(dbg, buffer, strlen(buffer));
417 SV *sv = newSVpvn("", 0);
420 s = CopFILE(PL_curcop);
423 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
424 (IV) CopLINE(PL_curcop));
425 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
428 PerlLIO_write(dbg, s, len);
435 /*--------------------------------------------------------------------------------------*/
438 * Inner level routines
442 * Table of pointers to the PerlIO structs (malloc'ed)
444 #define PERLIO_TABLE_SIZE 64
447 PerlIO_allocate(pTHX)
450 * Find a free slot in the table, allocating new table as necessary
455 while ((f = *last)) {
457 last = (PerlIO **) (f);
458 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
464 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
472 #undef PerlIO_fdupopen
474 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
476 if (PerlIOValid(f)) {
477 PerlIO_funcs *tab = PerlIOBase(f)->tab;
479 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
480 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
484 SETERRNO(EBADF, SS_IVCHAN);
490 PerlIO_cleantable(pTHX_ PerlIO **tablep)
492 PerlIO *table = *tablep;
495 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
496 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
497 PerlIO *f = table + i;
509 PerlIO_list_alloc(pTHX)
512 Newz('L', list, 1, PerlIO_list_t);
518 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
521 if (--list->refcnt == 0) {
524 for (i = 0; i < list->cur; i++) {
525 if (list->array[i].arg)
526 SvREFCNT_dec(list->array[i].arg);
528 Safefree(list->array);
536 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
539 if (list->cur >= list->len) {
542 Renew(list->array, list->len, PerlIO_pair_t);
544 New('l', list->array, list->len, PerlIO_pair_t);
546 p = &(list->array[list->cur++]);
548 if ((p->arg = arg)) {
554 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
556 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
559 list = PerlIO_list_alloc(aTHX);
560 for (i=0; i < proto->cur; i++) {
562 if (proto->array[i].arg)
563 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
564 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
571 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
574 PerlIO **table = &proto->Iperlio;
577 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
578 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
579 PerlIO_allocate(aTHX); /* root slot is never used */
580 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
581 while ((f = *table)) {
583 table = (PerlIO **) (f++);
584 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
586 (void) fp_dup(f, 0, param);
595 PerlIO_destruct(pTHX)
597 PerlIO **table = &PL_perlio;
600 PerlIO_debug("Destruct %p\n",aTHX);
602 while ((f = *table)) {
604 table = (PerlIO **) (f++);
605 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
609 if (l->tab->kind & PERLIO_K_DESTRUCT) {
610 PerlIO_debug("Destruct popping %s\n", l->tab->name);
624 PerlIO_pop(pTHX_ PerlIO *f)
628 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
629 if (l->tab->Popped) {
631 * If popped returns non-zero do not free its layer structure
632 * it has either done so itself, or it is shared and still in
635 if ((*l->tab->Popped) (aTHX_ f) != 0)
643 /*--------------------------------------------------------------------------------------*/
645 * XS Interface for perl code
649 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
652 if ((SSize_t) len <= 0)
654 for (i = 0; i < PL_known_layers->cur; i++) {
655 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
656 if (memEQ(f->name, name, len)) {
657 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
661 if (load && PL_subname && PL_def_layerlist
662 && PL_def_layerlist->cur >= 2) {
663 if (PL_in_load_module) {
664 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
667 SV *pkgsv = newSVpvn("PerlIO", 6);
668 SV *layer = newSVpvn(name, len);
670 SAVEINT(PL_in_load_module);
673 * The two SVs are magically freed by load_module
675 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
678 return PerlIO_find_layer(aTHX_ name, len, 0);
681 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
685 #ifdef USE_ATTRIBUTES_FOR_PERLIO
688 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
691 IO *io = GvIOn((GV *) SvRV(sv));
692 PerlIO *ifp = IoIFP(io);
693 PerlIO *ofp = IoOFP(io);
694 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
700 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
703 IO *io = GvIOn((GV *) SvRV(sv));
704 PerlIO *ifp = IoIFP(io);
705 PerlIO *ofp = IoOFP(io);
706 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
712 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
714 Perl_warn(aTHX_ "clear %" SVf, sv);
719 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
721 Perl_warn(aTHX_ "free %" SVf, sv);
725 MGVTBL perlio_vtab = {
733 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
736 SV *sv = SvRV(ST(1));
741 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
743 mg = mg_find(sv, PERL_MAGIC_ext);
744 mg->mg_virtual = &perlio_vtab;
746 Perl_warn(aTHX_ "attrib %" SVf, sv);
747 for (i = 2; i < items; i++) {
749 const char *name = SvPV(ST(i), len);
750 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
752 av_push(av, SvREFCNT_inc(layer));
763 #endif /* USE_ATTIBUTES_FOR_PERLIO */
766 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
768 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
769 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
773 XS(XS_PerlIO__Layer__find)
777 Perl_croak(aTHX_ "Usage class->find(name[,load])");
780 char *name = SvPV(ST(1), len);
781 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
782 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
784 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
791 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
793 if (!PL_known_layers)
794 PL_known_layers = PerlIO_list_alloc(aTHX);
795 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
796 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
800 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
803 const char *s = names;
805 while (isSPACE(*s) || *s == ':')
810 const char *as = Nullch;
812 if (!isIDFIRST(*s)) {
814 * Message is consistent with how attribute lists are
815 * passed. Even though this means "foo : : bar" is
816 * seen as an invalid separator character.
818 char q = ((*s == '\'') ? '"' : '\'');
819 if (ckWARN(WARN_LAYER))
820 Perl_warner(aTHX_ packWARN(WARN_LAYER),
821 "perlio: invalid separator character %c%c%c in layer specification list %s",
823 SETERRNO(EINVAL, LIB_INVARG);
828 } while (isALNUM(*e));
844 * It's a nul terminated string, not allowed
845 * to \ the terminating null. Anything other
846 * character is passed over.
856 if (ckWARN(WARN_LAYER))
857 Perl_warner(aTHX_ packWARN(WARN_LAYER),
858 "perlio: argument list not closed for layer \"%.*s\"",
870 bool warn_layer = ckWARN(WARN_LAYER);
871 PerlIO_funcs *layer =
872 PerlIO_find_layer(aTHX_ s, llen, 1);
874 PerlIO_list_push(aTHX_ av, layer,
881 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
894 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
896 PerlIO_funcs *tab = &PerlIO_perlio;
897 #ifdef PERLIO_USING_CRLF
900 if (PerlIO_stdio.Set_ptrcnt)
903 PerlIO_debug("Pushing %s\n", tab->name);
904 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
909 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
911 return av->array[n].arg;
915 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
917 if (n >= 0 && n < av->cur) {
918 PerlIO_debug("Layer %" IVdf " is %s\n", n,
919 av->array[n].funcs->name);
920 return av->array[n].funcs;
923 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
928 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
930 if (PerlIOValid(f)) {
938 PerlIO_funcs PerlIO_remove = {
939 sizeof(PerlIO_funcs),
942 PERLIO_K_DUMMY | PERLIO_K_UTF8,
961 NULL, /* get_bufsiz */
964 NULL, /* set_ptrcnt */
968 PerlIO_default_layers(pTHX)
970 if (!PL_def_layerlist) {
971 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
972 PerlIO_funcs *osLayer = &PerlIO_unix;
973 PL_def_layerlist = PerlIO_list_alloc(aTHX);
974 PerlIO_define_layer(aTHX_ & PerlIO_unix);
975 #if defined(WIN32) && !defined(UNDER_CE)
976 PerlIO_define_layer(aTHX_ & PerlIO_win32);
978 osLayer = &PerlIO_win32;
981 PerlIO_define_layer(aTHX_ & PerlIO_raw);
982 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
983 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
984 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
986 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
988 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
989 PerlIO_define_layer(aTHX_ & PerlIO_remove);
990 PerlIO_define_layer(aTHX_ & PerlIO_byte);
991 PerlIO_list_push(aTHX_ PL_def_layerlist,
992 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
995 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
998 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1001 if (PL_def_layerlist->cur < 2) {
1002 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1004 return PL_def_layerlist;
1008 Perl_boot_core_PerlIO(pTHX)
1010 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1011 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1014 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1018 PerlIO_default_layer(pTHX_ I32 n)
1020 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1023 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1026 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1027 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1030 PerlIO_stdstreams(pTHX)
1033 PerlIO_allocate(aTHX);
1034 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1035 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1036 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1041 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1043 if (tab->fsize != sizeof(PerlIO_funcs)) {
1045 Perl_croak(aTHX_ "Layer does not match this perl");
1049 if (tab->size < sizeof(PerlIOl)) {
1052 /* Real layer with a data area */
1053 Newc('L',l,tab->size,char,PerlIOl);
1055 Zero(l, tab->size, char);
1059 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1060 (mode) ? mode : "(Null)", (void*)arg);
1061 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1062 PerlIO_pop(aTHX_ f);
1068 /* Pseudo-layer where push does its own stack adjust */
1069 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1070 (mode) ? mode : "(Null)", (void*)arg);
1071 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1079 PerlIOBase_binmode(pTHX_ PerlIO *f)
1081 if (PerlIOValid(f)) {
1082 /* Is layer suitable for raw stream ? */
1083 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1084 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1085 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1088 /* Not suitable - pop it */
1089 PerlIO_pop(aTHX_ f);
1097 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1100 if (PerlIOValid(f)) {
1105 * Strip all layers that are not suitable for a raw stream
1108 while (t && (l = *t)) {
1109 if (l->tab->Binmode) {
1110 /* Has a handler - normal case */
1111 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1113 /* Layer still there - move down a layer */
1122 /* No handler - pop it */
1123 PerlIO_pop(aTHX_ t);
1126 if (PerlIOValid(f)) {
1127 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1135 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1136 PerlIO_list_t *layers, IV n, IV max)
1140 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1142 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1153 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1157 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1158 code = PerlIO_parse_layers(aTHX_ layers, names);
1160 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1162 PerlIO_list_free(aTHX_ layers);
1168 /*--------------------------------------------------------------------------------------*/
1170 * Given the abstraction above the public API functions
1174 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1176 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1177 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1178 (names) ? names : "(Null)");
1180 /* Do not flush etc. if (e.g.) switching encodings.
1181 if a pushed layer knows it needs to flush lower layers
1182 (for example :unix which is never going to call them)
1183 it can do the flush when it is pushed.
1185 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1188 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1189 #ifdef PERLIO_USING_CRLF
1190 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1191 O_BINARY so we can look for it in mode.
1193 if (!(mode & O_BINARY)) {
1195 /* FIXME?: Looking down the layer stack seems wrong,
1196 but is a way of reaching past (say) an encoding layer
1197 to flip CRLF-ness of the layer(s) below
1200 /* Perhaps we should turn on bottom-most aware layer
1201 e.g. Ilya's idea that UNIX TTY could serve
1203 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1204 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1205 /* Not in text mode - flush any pending stuff and flip it */
1207 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1209 /* Only need to turn it on in one layer so we are done */
1214 /* Not finding a CRLF aware layer presumably means we are binary
1215 which is not what was requested - so we failed
1216 We _could_ push :crlf layer but so could caller
1221 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1222 So code that used to be here is now in PerlIORaw_pushed().
1224 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1229 PerlIO__close(pTHX_ PerlIO *f)
1232 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1234 SETERRNO(EBADF, SS_IVCHAN);
1240 Perl_PerlIO_close(pTHX_ PerlIO *f)
1243 if (PerlIOValid(f)) {
1244 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1246 PerlIO_pop(aTHX_ f);
1253 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1256 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1258 SETERRNO(EBADF, SS_IVCHAN);
1264 PerlIO_context_layers(pTHX_ const char *mode)
1266 const char *type = NULL;
1268 * Need to supply default layer info from open.pm
1271 SV *layers = PL_curcop->cop_io;
1274 type = SvPV(layers, len);
1275 if (type && mode[0] != 'r') {
1277 * Skip to write part
1279 const char *s = strchr(type, 0);
1280 if (s && (STRLEN)(s - type) < len) {
1289 static PerlIO_funcs *
1290 PerlIO_layer_from_ref(pTHX_ SV *sv)
1293 * For any scalar type load the handler which is bundled with perl
1295 if (SvTYPE(sv) < SVt_PVAV)
1296 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1299 * For other types allow if layer is known but don't try and load it
1301 switch (SvTYPE(sv)) {
1303 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1305 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1307 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1309 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1315 PerlIO_resolve_layers(pTHX_ const char *layers,
1316 const char *mode, int narg, SV **args)
1318 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1321 PerlIO_stdstreams(aTHX);
1325 * If it is a reference but not an object see if we have a handler
1328 if (SvROK(arg) && !sv_isobject(arg)) {
1329 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1331 def = PerlIO_list_alloc(aTHX);
1332 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1336 * Don't fail if handler cannot be found :via(...) etc. may do
1337 * something sensible else we will just stringfy and open
1343 layers = PerlIO_context_layers(aTHX_ mode);
1344 if (layers && *layers) {
1348 av = PerlIO_list_alloc(aTHX);
1349 for (i = 0; i < def->cur; i++) {
1350 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1357 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1361 PerlIO_list_free(aTHX_ av);
1362 return (PerlIO_list_t *) NULL;
1373 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1374 int imode, int perm, PerlIO *f, int narg, SV **args)
1376 if (!f && narg == 1 && *args == &PL_sv_undef) {
1377 if ((f = PerlIO_tmpfile())) {
1379 layers = PerlIO_context_layers(aTHX_ mode);
1380 if (layers && *layers)
1381 PerlIO_apply_layers(aTHX_ f, mode, layers);
1385 PerlIO_list_t *layera = NULL;
1387 PerlIO_funcs *tab = NULL;
1388 if (PerlIOValid(f)) {
1390 * This is "reopen" - it is not tested as perl does not use it
1394 layera = PerlIO_list_alloc(aTHX);
1396 SV *arg = (l->tab->Getarg)
1397 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1399 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1400 l = *PerlIONext(&l);
1404 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1410 * Start at "top" of layer stack
1412 n = layera->cur - 1;
1414 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1423 * Found that layer 'n' can do opens - call it
1425 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1426 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1428 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1429 tab->name, layers, mode, fd, imode, perm,
1430 (void*)f, narg, (void*)args);
1431 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1434 if (n + 1 < layera->cur) {
1436 * More layers above the one that we used to open -
1439 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1440 /* If pushing layers fails close the file */
1447 PerlIO_list_free(aTHX_ layera);
1454 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1457 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1459 SETERRNO(EBADF, SS_IVCHAN);
1465 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1468 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1470 SETERRNO(EBADF, SS_IVCHAN);
1476 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1479 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1481 SETERRNO(EBADF, SS_IVCHAN);
1487 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1490 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1492 SETERRNO(EBADF, SS_IVCHAN);
1498 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1501 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1503 SETERRNO(EBADF, SS_IVCHAN);
1509 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1513 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1514 if (tab && tab->Flush) {
1515 return (*tab->Flush) (aTHX_ f);
1518 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1519 SETERRNO(EBADF, SS_IVCHAN);
1524 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1525 SETERRNO(EBADF, SS_IVCHAN);
1531 * Is it good API design to do flush-all on NULL, a potentially
1532 * errorneous input? Maybe some magical value (PerlIO*
1533 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1534 * things on fflush(NULL), but should we be bound by their design
1537 PerlIO **table = &PL_perlio;
1539 while ((f = *table)) {
1541 table = (PerlIO **) (f++);
1542 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1543 if (*f && PerlIO_flush(f) != 0)
1553 PerlIOBase_flush_linebuf(pTHX)
1555 PerlIO **table = &PL_perlio;
1557 while ((f = *table)) {
1559 table = (PerlIO **) (f++);
1560 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1563 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1564 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1572 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1575 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1577 SETERRNO(EBADF, SS_IVCHAN);
1583 PerlIO_isutf8(PerlIO *f)
1586 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1588 SETERRNO(EBADF, SS_IVCHAN);
1594 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1597 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1599 SETERRNO(EBADF, SS_IVCHAN);
1605 Perl_PerlIO_error(pTHX_ PerlIO *f)
1608 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1610 SETERRNO(EBADF, SS_IVCHAN);
1616 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1619 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1621 SETERRNO(EBADF, SS_IVCHAN);
1625 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1628 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1630 SETERRNO(EBADF, SS_IVCHAN);
1634 PerlIO_has_base(PerlIO *f)
1636 if (PerlIOValid(f)) {
1637 return (PerlIOBase(f)->tab->Get_base != NULL);
1643 PerlIO_fast_gets(PerlIO *f)
1645 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1646 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1647 return (tab->Set_ptrcnt != NULL);
1653 PerlIO_has_cntptr(PerlIO *f)
1655 if (PerlIOValid(f)) {
1656 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1657 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1663 PerlIO_canset_cnt(PerlIO *f)
1665 if (PerlIOValid(f)) {
1666 PerlIOl *l = PerlIOBase(f);
1667 return (l->tab->Set_ptrcnt != NULL);
1673 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1676 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1681 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1684 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1689 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1691 if (PerlIOValid(f)) {
1692 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1693 if (tab->Get_ptr == NULL)
1695 return (*tab->Get_ptr) (aTHX_ f);
1701 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1703 if (PerlIOValid(f)) {
1704 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1705 if (tab->Get_cnt == NULL)
1707 return (*tab->Get_cnt) (aTHX_ f);
1713 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1715 if (PerlIOValid(f)) {
1716 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1721 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1723 if (PerlIOValid(f)) {
1724 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1725 if (tab->Set_ptrcnt == NULL) {
1726 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1728 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1733 /*--------------------------------------------------------------------------------------*/
1735 * utf8 and raw dummy layers
1739 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1741 if (PerlIOValid(f)) {
1742 if (tab->kind & PERLIO_K_UTF8)
1743 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1745 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1751 PerlIO_funcs PerlIO_utf8 = {
1752 sizeof(PerlIO_funcs),
1755 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1773 NULL, /* get_base */
1774 NULL, /* get_bufsiz */
1777 NULL, /* set_ptrcnt */
1780 PerlIO_funcs PerlIO_byte = {
1781 sizeof(PerlIO_funcs),
1802 NULL, /* get_base */
1803 NULL, /* get_bufsiz */
1806 NULL, /* set_ptrcnt */
1810 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1811 IV n, const char *mode, int fd, int imode, int perm,
1812 PerlIO *old, int narg, SV **args)
1814 PerlIO_funcs *tab = PerlIO_default_btm();
1815 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1819 PerlIO_funcs PerlIO_raw = {
1820 sizeof(PerlIO_funcs),
1841 NULL, /* get_base */
1842 NULL, /* get_bufsiz */
1845 NULL, /* set_ptrcnt */
1847 /*--------------------------------------------------------------------------------------*/
1848 /*--------------------------------------------------------------------------------------*/
1850 * "Methods" of the "base class"
1854 PerlIOBase_fileno(pTHX_ PerlIO *f)
1856 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1860 PerlIO_modestr(PerlIO * f, char *buf)
1863 if (PerlIOValid(f)) {
1864 IV flags = PerlIOBase(f)->flags;
1865 if (flags & PERLIO_F_APPEND) {
1867 if (flags & PERLIO_F_CANREAD) {
1871 else if (flags & PERLIO_F_CANREAD) {
1873 if (flags & PERLIO_F_CANWRITE)
1876 else if (flags & PERLIO_F_CANWRITE) {
1878 if (flags & PERLIO_F_CANREAD) {
1882 #ifdef PERLIO_USING_CRLF
1883 if (!(flags & PERLIO_F_CRLF))
1893 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1895 PerlIOl *l = PerlIOBase(f);
1897 const char *omode = mode;
1900 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1901 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1902 if (tab->Set_ptrcnt != NULL)
1903 l->flags |= PERLIO_F_FASTGETS;
1905 if (*mode == '#' || *mode == 'I')
1909 l->flags |= PERLIO_F_CANREAD;
1912 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1915 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1918 SETERRNO(EINVAL, LIB_INVARG);
1924 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1927 l->flags &= ~PERLIO_F_CRLF;
1930 l->flags |= PERLIO_F_CRLF;
1933 SETERRNO(EINVAL, LIB_INVARG);
1940 l->flags |= l->next->flags &
1941 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1946 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1947 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1948 l->flags, PerlIO_modestr(f, temp));
1954 PerlIOBase_popped(pTHX_ PerlIO *f)
1960 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1963 * Save the position as current head considers it
1965 Off_t old = PerlIO_tell(f);
1967 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1968 PerlIOSelf(f, PerlIOBuf)->posn = old;
1969 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1974 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1976 STDCHAR *buf = (STDCHAR *) vbuf;
1978 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1981 SSize_t avail = PerlIO_get_cnt(f);
1984 take = ((SSize_t)count < avail) ? count : avail;
1986 STDCHAR *ptr = PerlIO_get_ptr(f);
1987 Copy(ptr, buf, take, STDCHAR);
1988 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1992 if (count > 0 && avail <= 0) {
1993 if (PerlIO_fill(f) != 0)
1997 return (buf - (STDCHAR *) vbuf);
2003 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2009 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2015 PerlIOBase_close(pTHX_ PerlIO *f)
2018 PerlIO *n = PerlIONext(f);
2019 if (PerlIO_flush(f) != 0)
2021 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
2023 PerlIOBase(f)->flags &=
2024 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2029 PerlIOBase_eof(pTHX_ PerlIO *f)
2031 if (PerlIOValid(f)) {
2032 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2038 PerlIOBase_error(pTHX_ PerlIO *f)
2040 if (PerlIOValid(f)) {
2041 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2047 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2049 if (PerlIOValid(f)) {
2050 PerlIO *n = PerlIONext(f);
2051 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2058 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2060 if (PerlIOValid(f)) {
2061 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2066 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2072 return sv_dup(arg, param);
2075 return newSVsv(arg);
2078 return newSVsv(arg);
2083 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2085 PerlIO *nexto = PerlIONext(o);
2086 if (PerlIOValid(nexto)) {
2087 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2088 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2091 PerlIO_funcs *self = PerlIOBase(o)->tab;
2094 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2095 self->name, (void*)f, (void*)o, (void*)param);
2097 arg = (*self->Getarg)(aTHX_ o,param,flags);
2099 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2107 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2109 perl_mutex PerlIO_mutex;
2111 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2116 /* Place holder for stdstreams call ??? */
2118 MUTEX_INIT(&PerlIO_mutex);
2123 PerlIOUnix_refcnt_inc(int fd)
2125 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2127 MUTEX_LOCK(&PerlIO_mutex);
2129 PerlIO_fd_refcnt[fd]++;
2130 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2132 MUTEX_UNLOCK(&PerlIO_mutex);
2138 PerlIOUnix_refcnt_dec(int fd)
2141 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2143 MUTEX_LOCK(&PerlIO_mutex);
2145 cnt = --PerlIO_fd_refcnt[fd];
2146 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2148 MUTEX_UNLOCK(&PerlIO_mutex);
2155 PerlIO_cleanup(pTHX)
2159 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2161 PerlIO_debug("Cleanup layers\n");
2163 /* Raise STDIN..STDERR refcount so we don't close them */
2164 for (i=0; i < 3; i++)
2165 PerlIOUnix_refcnt_inc(i);
2166 PerlIO_cleantable(aTHX_ &PL_perlio);
2167 /* Restore STDIN..STDERR refcount */
2168 for (i=0; i < 3; i++)
2169 PerlIOUnix_refcnt_dec(i);
2171 if (PL_known_layers) {
2172 PerlIO_list_free(aTHX_ PL_known_layers);
2173 PL_known_layers = NULL;
2175 if(PL_def_layerlist) {
2176 PerlIO_list_free(aTHX_ PL_def_layerlist);
2177 PL_def_layerlist = NULL;
2183 /*--------------------------------------------------------------------------------------*/
2185 * Bottom-most level for UNIX-like case
2189 struct _PerlIO base; /* The generic part */
2190 int fd; /* UNIX like file descriptor */
2191 int oflags; /* open/fcntl flags */
2195 PerlIOUnix_oflags(const char *mode)
2198 if (*mode == 'I' || *mode == '#')
2203 if (*++mode == '+') {
2210 oflags = O_CREAT | O_TRUNC;
2211 if (*++mode == '+') {
2220 oflags = O_CREAT | O_APPEND;
2221 if (*++mode == '+') {
2234 else if (*mode == 't') {
2236 oflags &= ~O_BINARY;
2240 * Always open in binary mode
2243 if (*mode || oflags == -1) {
2244 SETERRNO(EINVAL, LIB_INVARG);
2251 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2253 return PerlIOSelf(f, PerlIOUnix)->fd;
2257 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2259 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2260 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2261 if (*PerlIONext(f)) {
2262 /* We never call down so do any pending stuff now */
2263 PerlIO_flush(PerlIONext(f));
2264 s->fd = PerlIO_fileno(PerlIONext(f));
2266 * XXX could (or should) we retrieve the oflags from the open file
2267 * handle rather than believing the "mode" we are passed in? XXX
2268 * Should the value on NULL mode be 0 or -1?
2270 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2272 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2277 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2278 IV n, const char *mode, int fd, int imode,
2279 int perm, PerlIO *f, int narg, SV **args)
2281 if (PerlIOValid(f)) {
2282 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2283 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2286 char *path = SvPV_nolen(*args);
2290 imode = PerlIOUnix_oflags(mode);
2294 fd = PerlLIO_open3(path, imode, perm);
2302 f = PerlIO_allocate(aTHX);
2304 if (!PerlIOValid(f)) {
2305 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2309 s = PerlIOSelf(f, PerlIOUnix);
2312 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2313 PerlIOUnix_refcnt_inc(fd);
2319 * FIXME: pop layers ???
2327 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2329 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2331 if (flags & PERLIO_DUP_FD) {
2332 fd = PerlLIO_dup(fd);
2334 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2335 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2337 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2338 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2340 PerlIOUnix_refcnt_inc(fd);
2349 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2351 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2352 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2353 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2357 SSize_t len = PerlLIO_read(fd, vbuf, count);
2358 if (len >= 0 || errno != EINTR) {
2360 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2361 else if (len == 0 && count != 0)
2362 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2370 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2372 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2374 SSize_t len = PerlLIO_write(fd, vbuf, count);
2375 if (len >= 0 || errno != EINTR) {
2377 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2385 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2388 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2389 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2390 return (new == (Off_t) - 1) ? -1 : 0;
2394 PerlIOUnix_tell(pTHX_ PerlIO *f)
2396 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2401 PerlIOUnix_close(pTHX_ PerlIO *f)
2403 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2405 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2406 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2407 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2412 SETERRNO(EBADF,SS_IVCHAN);
2415 while (PerlLIO_close(fd) != 0) {
2416 if (errno != EINTR) {
2423 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2428 PerlIO_funcs PerlIO_unix = {
2429 sizeof(PerlIO_funcs),
2436 PerlIOBase_binmode, /* binmode */
2446 PerlIOBase_noop_ok, /* flush */
2447 PerlIOBase_noop_fail, /* fill */
2450 PerlIOBase_clearerr,
2451 PerlIOBase_setlinebuf,
2452 NULL, /* get_base */
2453 NULL, /* get_bufsiz */
2456 NULL, /* set_ptrcnt */
2459 /*--------------------------------------------------------------------------------------*/
2464 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2465 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2466 broken by the last second glibc 2.3 fix
2468 #define STDIO_BUFFER_WRITABLE
2473 struct _PerlIO base;
2474 FILE *stdio; /* The stream */
2478 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2481 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2482 return PerlSIO_fileno(s);
2489 PerlIOStdio_mode(const char *mode, char *tmode)
2495 #ifdef PERLIO_USING_CRLF
2503 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2506 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2507 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2508 if (toptab == tab) {
2509 /* Top is already stdio - pop self (duplicate) and use original */
2510 PerlIO_pop(aTHX_ f);
2513 int fd = PerlIO_fileno(n);
2516 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2517 mode = PerlIOStdio_mode(mode, tmode)))) {
2518 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2519 /* We never call down so do any pending stuff now */
2520 PerlIO_flush(PerlIONext(f));
2527 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2532 PerlIO_importFILE(FILE *stdio, const char *mode)
2538 if (!mode || !*mode) {
2539 /* We need to probe to see how we can open the stream
2540 so start with read/write and then try write and read
2541 we dup() so that we can fclose without loosing the fd.
2543 Note that the errno value set by a failing fdopen
2544 varies between stdio implementations.
2546 int fd = PerlLIO_dup(fileno(stdio));
2547 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2549 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2552 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2555 /* Don't seem to be able to open */
2561 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2562 s = PerlIOSelf(f, PerlIOStdio);
2570 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2571 IV n, const char *mode, int fd, int imode,
2572 int perm, PerlIO *f, int narg, SV **args)
2575 if (PerlIOValid(f)) {
2576 char *path = SvPV_nolen(*args);
2577 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2579 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2580 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2585 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2590 char *path = SvPV_nolen(*args);
2593 fd = PerlLIO_open3(path, imode, perm);
2596 FILE *stdio = PerlSIO_fopen(path, mode);
2600 f = PerlIO_allocate(aTHX);
2602 if ((f = PerlIO_push(aTHX_ f, self,
2603 (mode = PerlIOStdio_mode(mode, tmode)),
2605 s = PerlIOSelf(f, PerlIOStdio);
2607 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2626 stdio = PerlSIO_stdin;
2629 stdio = PerlSIO_stdout;
2632 stdio = PerlSIO_stderr;
2637 stdio = PerlSIO_fdopen(fd, mode =
2638 PerlIOStdio_mode(mode, tmode));
2643 f = PerlIO_allocate(aTHX);
2645 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2646 s = PerlIOSelf(f, PerlIOStdio);
2648 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2658 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2660 /* This assumes no layers underneath - which is what
2661 happens, but is not how I remember it. NI-S 2001/10/16
2663 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2664 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2665 int fd = fileno(stdio);
2667 if (flags & PERLIO_DUP_FD) {
2668 int dfd = PerlLIO_dup(fileno(stdio));
2670 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2674 /* FIXME: To avoid messy error recovery if dup fails
2675 re-use the existing stdio as though flag was not set
2679 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2681 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2682 PerlIOUnix_refcnt_inc(fileno(stdio));
2688 PerlIOStdio_close(pTHX_ PerlIO *f)
2690 #ifdef SOCKS5_VERSION_NAME
2692 Sock_size_t optlen = sizeof(int);
2694 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2700 int fd = fileno(stdio);
2703 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2704 /* File descriptor still in use */
2706 /* For STD* handles don't close the stdio at all */
2707 return PerlIO_flush(f);
2710 /* Tricky - must fclose(stdio) to free memory but not close(fd) */
2712 /* Sarathy pointed out that another thread could reuse
2713 fd after fclose() but before we dup2() below
2714 so take out a MUTEX to shut them out
2716 MUTEX_LOCK(&PerlIO_mutex);
2718 dupfd = PerlLIO_dup(fd);
2722 #ifdef SOCKS5_VERSION_NAME
2724 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2726 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2728 PerlSIO_fclose(stdio)
2732 /* We need to restore fd from the saved copy */
2733 if (PerlLIO_dup2(dupfd,fd) != fd)
2736 MUTEX_UNLOCK(&PerlIO_mutex);
2738 if (PerlLIO_close(dupfd) != 0)
2748 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2750 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2753 STDCHAR *buf = (STDCHAR *) vbuf;
2755 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2756 * stdio does not do that for fread()
2758 int ch = PerlSIO_fgetc(s);
2765 got = PerlSIO_fread(vbuf, 1, count, s);
2770 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2773 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2775 #ifdef STDIO_BUFFER_WRITABLE
2776 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2777 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2778 STDCHAR *base = PerlIO_get_base(f);
2779 SSize_t cnt = PerlIO_get_cnt(f);
2780 STDCHAR *ptr = PerlIO_get_ptr(f);
2781 SSize_t avail = ptr - base;
2783 if (avail > count) {
2787 Move(buf-avail,ptr,avail,STDCHAR);
2790 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2791 if (PerlSIO_feof(s) && unread >= 0)
2792 PerlSIO_clearerr(s);
2797 if (PerlIO_has_cntptr(f)) {
2798 /* We can get pointer to buffer but not its base
2799 Do ungetc() but check chars are ending up in the
2802 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2803 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2805 int ch = *--buf & 0xFF;
2806 if (ungetc(ch,s) != ch) {
2807 /* ungetc did not work */
2810 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2811 /* Did not change pointer as expected */
2812 fgetc(s); /* get char back again */
2822 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2828 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2830 return PerlSIO_fwrite(vbuf, 1, count,
2831 PerlIOSelf(f, PerlIOStdio)->stdio);
2835 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2837 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2838 return PerlSIO_fseek(stdio, offset, whence);
2842 PerlIOStdio_tell(pTHX_ PerlIO *f)
2844 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2845 return PerlSIO_ftell(stdio);
2849 PerlIOStdio_flush(pTHX_ PerlIO *f)
2851 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2852 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2853 return PerlSIO_fflush(stdio);
2858 * FIXME: This discards ungetc() and pre-read stuff which is not
2859 * right if this is just a "sync" from a layer above Suspect right
2860 * design is to do _this_ but not have layer above flush this
2861 * layer read-to-read
2864 * Not writeable - sync by attempting a seek
2867 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2875 PerlIOStdio_eof(pTHX_ PerlIO *f)
2877 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2881 PerlIOStdio_error(pTHX_ PerlIO *f)
2883 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2887 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2889 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2893 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2895 #ifdef HAS_SETLINEBUF
2896 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2898 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2904 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2906 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2907 return (STDCHAR*)PerlSIO_get_base(stdio);
2911 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2913 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2914 return PerlSIO_get_bufsiz(stdio);
2918 #ifdef USE_STDIO_PTR
2920 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2922 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2923 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2927 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2929 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2930 return PerlSIO_get_cnt(stdio);
2934 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2936 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2938 #ifdef STDIO_PTR_LVALUE
2939 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2940 #ifdef STDIO_PTR_LVAL_SETS_CNT
2941 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2942 assert(PerlSIO_get_cnt(stdio) == (cnt));
2945 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2947 * Setting ptr _does_ change cnt - we are done
2951 #else /* STDIO_PTR_LVALUE */
2953 #endif /* STDIO_PTR_LVALUE */
2956 * Now (or only) set cnt
2958 #ifdef STDIO_CNT_LVALUE
2959 PerlSIO_set_cnt(stdio, cnt);
2960 #else /* STDIO_CNT_LVALUE */
2961 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2962 PerlSIO_set_ptr(stdio,
2963 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2965 #else /* STDIO_PTR_LVAL_SETS_CNT */
2967 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2968 #endif /* STDIO_CNT_LVALUE */
2975 PerlIOStdio_fill(pTHX_ PerlIO *f)
2977 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2980 * fflush()ing read-only streams can cause trouble on some stdio-s
2982 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2983 if (PerlSIO_fflush(stdio) != 0)
2986 c = PerlSIO_fgetc(stdio);
2990 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2992 #ifdef STDIO_BUFFER_WRITABLE
2993 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2994 /* Fake ungetc() to the real buffer in case system's ungetc
2997 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2998 SSize_t cnt = PerlSIO_get_cnt(stdio);
2999 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3000 if (ptr == base+1) {
3001 *--ptr = (STDCHAR) c;
3002 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3003 if (PerlSIO_feof(stdio))
3004 PerlSIO_clearerr(stdio);
3010 if (PerlIO_has_cntptr(f)) {
3012 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3019 /* An ungetc()d char is handled separately from the regular
3020 * buffer, so we stuff it in the buffer ourselves.
3021 * Should never get called as should hit code above
3023 *(--((*stdio)->_ptr)) = (unsigned char) c;
3026 /* If buffer snoop scheme above fails fall back to
3029 if (PerlSIO_ungetc(c, stdio) != c)
3037 PerlIO_funcs PerlIO_stdio = {
3038 sizeof(PerlIO_funcs),
3040 sizeof(PerlIOStdio),
3041 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3045 PerlIOBase_binmode, /* binmode */
3059 PerlIOStdio_clearerr,
3060 PerlIOStdio_setlinebuf,
3062 PerlIOStdio_get_base,
3063 PerlIOStdio_get_bufsiz,
3068 #ifdef USE_STDIO_PTR
3069 PerlIOStdio_get_ptr,
3070 PerlIOStdio_get_cnt,
3071 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3072 PerlIOStdio_set_ptrcnt
3073 #else /* STDIO_PTR_LVALUE */
3075 #endif /* STDIO_PTR_LVALUE */
3076 #else /* USE_STDIO_PTR */
3080 #endif /* USE_STDIO_PTR */
3083 /* Note that calls to PerlIO_exportFILE() are reversed using
3084 * PerlIO_releaseFILE(), not importFILE. */
3086 PerlIO_exportFILE(PerlIO * f, const char *mode)
3090 if (PerlIOValid(f)) {
3093 if (!mode || !*mode) {
3094 mode = PerlIO_modestr(f, buf);
3096 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3099 /* De-link any lower layers so new :stdio sticks */
3101 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3102 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3104 /* Link previous lower layers under new one */
3108 /* restore layers list */
3118 PerlIO_findFILE(PerlIO *f)
3122 if (l->tab == &PerlIO_stdio) {
3123 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3126 l = *PerlIONext(&l);
3128 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3129 return PerlIO_exportFILE(f, Nullch);
3132 /* Use this to reverse PerlIO_exportFILE calls. */
3134 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3138 if (l->tab == &PerlIO_stdio) {
3139 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3140 if (s->stdio == f) {
3142 PerlIO_pop(aTHX_ p);
3151 /*--------------------------------------------------------------------------------------*/
3153 * perlio buffer layer
3157 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3159 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3160 int fd = PerlIO_fileno(f);
3161 if (fd >= 0 && PerlLIO_isatty(fd)) {
3162 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3164 if (*PerlIONext(f)) {
3165 Off_t posn = PerlIO_tell(PerlIONext(f));
3166 if (posn != (Off_t) - 1) {
3170 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3174 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3175 IV n, const char *mode, int fd, int imode, int perm,
3176 PerlIO *f, int narg, SV **args)
3178 if (PerlIOValid(f)) {
3179 PerlIO *next = PerlIONext(f);
3180 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3181 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3183 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3188 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3196 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3199 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3201 * if push fails during open, open fails. close will pop us.
3206 fd = PerlIO_fileno(f);
3207 if (init && fd == 2) {
3209 * Initial stderr is unbuffered
3211 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3213 #ifdef PERLIO_USING_CRLF
3214 # ifdef PERLIO_IS_BINMODE_FD
3215 if (PERLIO_IS_BINMODE_FD(fd))
3216 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3220 * do something about failing setmode()? --jhi
3222 PerlLIO_setmode(fd, O_BINARY);
3231 * This "flush" is akin to sfio's sync in that it handles files in either
3232 * read or write state
3235 PerlIOBuf_flush(pTHX_ PerlIO *f)
3237 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3239 PerlIO *n = PerlIONext(f);
3240 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3242 * write() the buffer
3244 STDCHAR *buf = b->buf;
3246 while (p < b->ptr) {
3247 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3251 else if (count < 0 || PerlIO_error(n)) {
3252 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3257 b->posn += (p - buf);
3259 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3260 STDCHAR *buf = PerlIO_get_base(f);
3262 * Note position change
3264 b->posn += (b->ptr - buf);
3265 if (b->ptr < b->end) {
3266 /* We did not consume all of it - try and seek downstream to
3267 our logical position
3269 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3270 /* Reload n as some layers may pop themselves on seek */
3271 b->posn = PerlIO_tell(n = PerlIONext(f));
3274 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3275 data is lost for good - so return saying "ok" having undone
3278 b->posn -= (b->ptr - buf);
3283 b->ptr = b->end = b->buf;
3284 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3285 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3286 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3292 PerlIOBuf_fill(pTHX_ PerlIO *f)
3294 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3295 PerlIO *n = PerlIONext(f);
3298 * Down-stream flush is defined not to loose read data so is harmless.
3299 * we would not normally be fill'ing if there was data left in anycase.
3301 if (PerlIO_flush(f) != 0)
3303 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3304 PerlIOBase_flush_linebuf(aTHX);
3307 PerlIO_get_base(f); /* allocate via vtable */
3309 b->ptr = b->end = b->buf;
3311 if (!PerlIOValid(n)) {
3312 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3316 if (PerlIO_fast_gets(n)) {
3318 * Layer below is also buffered. We do _NOT_ want to call its
3319 * ->Read() because that will loop till it gets what we asked for
3320 * which may hang on a pipe etc. Instead take anything it has to
3321 * hand, or ask it to fill _once_.
3323 avail = PerlIO_get_cnt(n);
3325 avail = PerlIO_fill(n);
3327 avail = PerlIO_get_cnt(n);
3329 if (!PerlIO_error(n) && PerlIO_eof(n))
3334 STDCHAR *ptr = PerlIO_get_ptr(n);
3335 SSize_t cnt = avail;
3336 if (avail > (SSize_t)b->bufsiz)
3338 Copy(ptr, b->buf, avail, STDCHAR);
3339 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3343 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3347 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3349 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3352 b->end = b->buf + avail;
3353 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3358 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3360 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3361 if (PerlIOValid(f)) {
3364 return PerlIOBase_read(aTHX_ f, vbuf, count);
3370 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3372 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3373 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3376 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3381 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3383 * Buffer is already a read buffer, we can overwrite any chars
3384 * which have been read back to buffer start
3386 avail = (b->ptr - b->buf);
3390 * Buffer is idle, set it up so whole buffer is available for
3394 b->end = b->buf + avail;
3396 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3398 * Buffer extends _back_ from where we are now
3400 b->posn -= b->bufsiz;
3402 if (avail > (SSize_t) count) {
3404 * If we have space for more than count, just move count
3412 * In simple stdio-like ungetc() case chars will be already
3415 if (buf != b->ptr) {
3416 Copy(buf, b->ptr, avail, STDCHAR);
3420 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3424 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3430 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3432 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3433 const STDCHAR *buf = (const STDCHAR *) vbuf;
3437 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3439 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3440 if (PerlIO_flush(f) != 0) {
3445 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3446 if ((SSize_t) count < avail)
3448 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3449 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3464 Copy(buf, b->ptr, avail, STDCHAR);
3471 if (b->ptr >= (b->buf + b->bufsiz))
3474 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3480 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3483 if ((code = PerlIO_flush(f)) == 0) {
3484 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3485 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3486 code = PerlIO_seek(PerlIONext(f), offset, whence);
3488 b->posn = PerlIO_tell(PerlIONext(f));
3495 PerlIOBuf_tell(pTHX_ PerlIO *f)
3497 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3499 * b->posn is file position where b->buf was read, or will be written
3501 Off_t posn = b->posn;
3502 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3503 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3505 /* As O_APPEND files are normally shared in some sense it is better
3510 /* when file is NOT shared then this is sufficient */
3511 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3513 posn = b->posn = PerlIO_tell(PerlIONext(f));
3517 * If buffer is valid adjust position by amount in buffer
3519 posn += (b->ptr - b->buf);
3525 PerlIOBuf_popped(pTHX_ PerlIO *f)
3527 IV code = PerlIOBase_popped(aTHX_ f);
3528 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3529 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3533 b->ptr = b->end = b->buf;
3534 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3539 PerlIOBuf_close(pTHX_ PerlIO *f)
3541 IV code = PerlIOBase_close(aTHX_ f);
3542 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3543 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3547 b->ptr = b->end = b->buf;
3548 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3553 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3555 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3562 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3564 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3567 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3568 return (b->end - b->ptr);
3573 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3575 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3580 Newz('B',b->buf,b->bufsiz, STDCHAR);
3582 b->buf = (STDCHAR *) & b->oneword;
3583 b->bufsiz = sizeof(b->oneword);
3592 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3594 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3597 return (b->end - b->buf);
3601 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3603 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3607 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3608 assert(PerlIO_get_cnt(f) == cnt);
3609 assert(b->ptr >= b->buf);
3611 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3615 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3617 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3622 PerlIO_funcs PerlIO_perlio = {
3623 sizeof(PerlIO_funcs),
3626 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3630 PerlIOBase_binmode, /* binmode */
3644 PerlIOBase_clearerr,
3645 PerlIOBase_setlinebuf,
3650 PerlIOBuf_set_ptrcnt,
3653 /*--------------------------------------------------------------------------------------*/
3655 * Temp layer to hold unread chars when cannot do it any other way
3659 PerlIOPending_fill(pTHX_ PerlIO *f)
3662 * Should never happen
3669 PerlIOPending_close(pTHX_ PerlIO *f)
3672 * A tad tricky - flush pops us, then we close new top
3675 return PerlIO_close(f);
3679 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3682 * A tad tricky - flush pops us, then we seek new top
3685 return PerlIO_seek(f, offset, whence);
3690 PerlIOPending_flush(pTHX_ PerlIO *f)
3692 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3693 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3697 PerlIO_pop(aTHX_ f);
3702 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3708 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3713 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3715 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3716 PerlIOl *l = PerlIOBase(f);
3718 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3719 * etc. get muddled when it changes mid-string when we auto-pop.
3721 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3722 (PerlIOBase(PerlIONext(f))->
3723 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3728 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3730 SSize_t avail = PerlIO_get_cnt(f);
3732 if ((SSize_t)count < avail)
3735 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3736 if (got >= 0 && got < (SSize_t)count) {
3738 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3739 if (more >= 0 || got == 0)
3745 PerlIO_funcs PerlIO_pending = {
3746 sizeof(PerlIO_funcs),
3749 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3750 PerlIOPending_pushed,
3753 PerlIOBase_binmode, /* binmode */
3762 PerlIOPending_close,
3763 PerlIOPending_flush,
3767 PerlIOBase_clearerr,
3768 PerlIOBase_setlinebuf,
3773 PerlIOPending_set_ptrcnt,
3778 /*--------------------------------------------------------------------------------------*/
3780 * crlf - translation On read translate CR,LF to "\n" we do this by
3781 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3782 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3786 PerlIOBuf base; /* PerlIOBuf stuff */
3787 STDCHAR *nl; /* Position of crlf we "lied" about in the
3792 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3795 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3796 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3798 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3799 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3800 PerlIOBase(f)->flags);
3807 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3809 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3814 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3815 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3817 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3818 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3820 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3825 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3826 b->end = b->ptr = b->buf + b->bufsiz;
3827 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3828 b->posn -= b->bufsiz;
3830 while (count > 0 && b->ptr > b->buf) {
3833 if (b->ptr - 2 >= b->buf) {
3856 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3858 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3861 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3862 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3863 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3864 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3866 while (nl < b->end && *nl != 0xd)
3868 if (nl < b->end && *nl == 0xd) {
3870 if (nl + 1 < b->end) {
3877 * Not CR,LF but just CR
3885 * Blast - found CR as last char in buffer
3890 * They may not care, defer work as long as
3894 return (nl - b->ptr);
3898 b->ptr++; /* say we have read it as far as
3899 * flush() is concerned */
3900 b->buf++; /* Leave space in front of buffer */
3901 /* Note as we have moved buf up flush's
3903 will naturally make posn point at CR
3905 b->bufsiz--; /* Buffer is thus smaller */
3906 code = PerlIO_fill(f); /* Fetch some more */
3907 b->bufsiz++; /* Restore size for next time */
3908 b->buf--; /* Point at space */
3909 b->ptr = nl = b->buf; /* Which is what we hand
3911 *nl = 0xd; /* Fill in the CR */
3913 goto test; /* fill() call worked */
3915 * CR at EOF - just fall through
3917 /* Should we clear EOF though ??? */
3922 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3928 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3930 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3931 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3937 if (ptr == b->end && *c->nl == 0xd) {
3938 /* Defered CR at end of buffer case - we lied about count */
3950 * Test code - delete when it works ...
3952 IV flags = PerlIOBase(f)->flags;
3953 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3954 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3955 /* Defered CR at end of buffer case - we lied about count */
3961 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3962 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3970 * They have taken what we lied about
3978 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3982 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3984 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3985 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3987 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3988 const STDCHAR *buf = (const STDCHAR *) vbuf;
3989 const STDCHAR *ebuf = buf + count;
3992 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3994 while (buf < ebuf) {
3995 STDCHAR *eptr = b->buf + b->bufsiz;
3996 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3997 while (buf < ebuf && b->ptr < eptr) {
3999 if ((b->ptr + 2) > eptr) {
4007 *(b->ptr)++ = 0xd; /* CR */
4008 *(b->ptr)++ = 0xa; /* LF */
4010 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4020 if (b->ptr >= eptr) {
4026 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4028 return (buf - (STDCHAR *) vbuf);
4033 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4035 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4040 return PerlIOBuf_flush(aTHX_ f);
4044 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4046 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4047 /* In text mode - flush any pending stuff and flip it */
4048 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4049 #ifndef PERLIO_USING_CRLF
4050 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4051 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4052 PerlIO_pop(aTHX_ f);
4059 PerlIO_funcs PerlIO_crlf = {
4060 sizeof(PerlIO_funcs),
4063 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4065 PerlIOBuf_popped, /* popped */
4067 PerlIOCrlf_binmode, /* binmode */
4071 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4073 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4074 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4082 PerlIOBase_clearerr,
4083 PerlIOBase_setlinebuf,
4088 PerlIOCrlf_set_ptrcnt,
4092 /*--------------------------------------------------------------------------------------*/
4094 * mmap as "buffer" layer
4098 PerlIOBuf base; /* PerlIOBuf stuff */
4099 Mmap_t mptr; /* Mapped address */
4100 Size_t len; /* mapped length */
4101 STDCHAR *bbuf; /* malloced buffer if map fails */
4104 static size_t page_size = 0;
4107 PerlIOMmap_map(pTHX_ PerlIO *f)
4109 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4110 IV flags = PerlIOBase(f)->flags;
4114 if (flags & PERLIO_F_CANREAD) {
4115 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4116 int fd = PerlIO_fileno(f);
4118 code = Fstat(fd, &st);
4119 if (code == 0 && S_ISREG(st.st_mode)) {
4120 SSize_t len = st.st_size - b->posn;
4124 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4126 SETERRNO(0, SS_NORMAL);
4127 # ifdef _SC_PAGESIZE
4128 page_size = sysconf(_SC_PAGESIZE);
4130 page_size = sysconf(_SC_PAGE_SIZE);
4132 if ((long) page_size < 0) {
4137 (void) SvUPGRADE(error, SVt_PV);
4138 msg = SvPVx(error, n_a);
4139 Perl_croak(aTHX_ "panic: sysconf: %s",
4144 "panic: sysconf: pagesize unknown");
4148 # ifdef HAS_GETPAGESIZE
4149 page_size = getpagesize();
4151 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4152 page_size = PAGESIZE; /* compiletime, bad */
4156 if ((IV) page_size <= 0)
4157 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4162 * This is a hack - should never happen - open should
4165 b->posn = PerlIO_tell(PerlIONext(f));
4167 posn = (b->posn / page_size) * page_size;
4168 len = st.st_size - posn;
4169 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4170 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4171 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4172 madvise(m->mptr, len, MADV_SEQUENTIAL);
4174 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4175 madvise(m->mptr, len, MADV_WILLNEED);
4177 PerlIOBase(f)->flags =
4178 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4179 b->end = ((STDCHAR *) m->mptr) + len;
4180 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4189 PerlIOBase(f)->flags =
4190 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4192 b->ptr = b->end = b->ptr;
4201 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4203 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4204 PerlIOBuf *b = &m->base;
4208 code = munmap(m->mptr, m->len);
4212 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4215 b->ptr = b->end = b->buf;
4216 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4222 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4224 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4225 PerlIOBuf *b = &m->base;
4226 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4228 * Already have a readbuffer in progress
4234 * We have a write buffer or flushed PerlIOBuf read buffer
4236 m->bbuf = b->buf; /* save it in case we need it again */
4237 b->buf = NULL; /* Clear to trigger below */
4240 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4243 * Map did not work - recover PerlIOBuf buffer if we have one
4248 b->ptr = b->end = b->buf;
4251 return PerlIOBuf_get_base(aTHX_ f);
4255 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4257 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4258 PerlIOBuf *b = &m->base;
4259 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4261 if (b->ptr && (b->ptr - count) >= b->buf
4262 && memEQ(b->ptr - count, vbuf, count)) {
4264 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4269 * Loose the unwritable mapped buffer
4273 * If flush took the "buffer" see if we have one from before
4275 if (!b->buf && m->bbuf)
4278 PerlIOBuf_get_base(aTHX_ f);
4282 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4286 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4288 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4289 PerlIOBuf *b = &m->base;
4290 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4292 * No, or wrong sort of, buffer
4295 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4299 * If unmap took the "buffer" see if we have one from before
4301 if (!b->buf && m->bbuf)
4304 PerlIOBuf_get_base(aTHX_ f);
4308 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4312 PerlIOMmap_flush(pTHX_ PerlIO *f)
4314 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4315 PerlIOBuf *b = &m->base;
4316 IV code = PerlIOBuf_flush(aTHX_ f);
4318 * Now we are "synced" at PerlIOBuf level
4325 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4330 * We seem to have a PerlIOBuf buffer which was not mapped
4331 * remember it in case we need one later
4340 PerlIOMmap_fill(pTHX_ PerlIO *f)
4342 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4343 IV code = PerlIO_flush(f);
4344 if (code == 0 && !b->buf) {
4345 code = PerlIOMmap_map(aTHX_ f);
4347 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4348 code = PerlIOBuf_fill(aTHX_ f);
4354 PerlIOMmap_close(pTHX_ PerlIO *f)
4356 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4357 PerlIOBuf *b = &m->base;
4358 IV code = PerlIO_flush(f);
4362 b->ptr = b->end = b->buf;
4364 if (PerlIOBuf_close(aTHX_ f) != 0)
4370 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4372 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4376 PerlIO_funcs PerlIO_mmap = {
4377 sizeof(PerlIO_funcs),
4380 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4384 PerlIOBase_binmode, /* binmode */
4398 PerlIOBase_clearerr,
4399 PerlIOBase_setlinebuf,
4400 PerlIOMmap_get_base,
4404 PerlIOBuf_set_ptrcnt,
4407 #endif /* HAS_MMAP */
4410 Perl_PerlIO_stdin(pTHX)
4413 PerlIO_stdstreams(aTHX);
4415 return &PL_perlio[1];
4419 Perl_PerlIO_stdout(pTHX)
4422 PerlIO_stdstreams(aTHX);
4424 return &PL_perlio[2];
4428 Perl_PerlIO_stderr(pTHX)
4431 PerlIO_stdstreams(aTHX);
4433 return &PL_perlio[3];
4436 /*--------------------------------------------------------------------------------------*/
4439 PerlIO_getname(PerlIO *f, char *buf)
4444 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4446 name = fgetname(stdio, buf);
4448 Perl_croak(aTHX_ "Don't know how to get file name");
4454 /*--------------------------------------------------------------------------------------*/
4456 * Functions which can be called on any kind of PerlIO implemented in
4460 #undef PerlIO_fdopen
4462 PerlIO_fdopen(int fd, const char *mode)
4465 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4470 PerlIO_open(const char *path, const char *mode)
4473 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4474 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4477 #undef Perlio_reopen
4479 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4482 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4483 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4488 PerlIO_getc(PerlIO *f)
4492 SSize_t count = PerlIO_read(f, buf, 1);
4494 return (unsigned char) buf[0];
4499 #undef PerlIO_ungetc
4501 PerlIO_ungetc(PerlIO *f, int ch)
4506 if (PerlIO_unread(f, &buf, 1) == 1)
4514 PerlIO_putc(PerlIO *f, int ch)
4518 return PerlIO_write(f, &buf, 1);
4523 PerlIO_puts(PerlIO *f, const char *s)
4526 STRLEN len = strlen(s);
4527 return PerlIO_write(f, s, len);
4530 #undef PerlIO_rewind
4532 PerlIO_rewind(PerlIO *f)
4535 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4539 #undef PerlIO_vprintf
4541 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4544 SV *sv = newSVpvn("", 0);
4550 Perl_va_copy(ap, apc);
4551 sv_vcatpvf(sv, fmt, &apc);
4553 sv_vcatpvf(sv, fmt, &ap);
4556 wrote = PerlIO_write(f, s, len);
4561 #undef PerlIO_printf
4563 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4568 result = PerlIO_vprintf(f, fmt, ap);
4573 #undef PerlIO_stdoutf
4575 PerlIO_stdoutf(const char *fmt, ...)
4581 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4586 #undef PerlIO_tmpfile
4588 PerlIO_tmpfile(void)
4591 * I have no idea how portable mkstemp() is ...
4593 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4596 FILE *stdio = PerlSIO_tmpfile();
4598 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4599 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4606 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4607 int fd = mkstemp(SvPVX(sv));
4610 f = PerlIO_fdopen(fd, "w+");
4612 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4614 PerlLIO_unlink(SvPVX(sv));
4624 #endif /* USE_SFIO */
4625 #endif /* PERLIO_IS_STDIO */
4627 /*======================================================================================*/
4629 * Now some functions in terms of above which may be needed even if we are
4630 * not in true PerlIO mode
4634 #undef PerlIO_setpos
4636 PerlIO_setpos(PerlIO *f, SV *pos)
4641 Off_t *posn = (Off_t *) SvPV(pos, len);
4642 if (f && len == sizeof(Off_t))
4643 return PerlIO_seek(f, *posn, SEEK_SET);
4645 SETERRNO(EINVAL, SS_IVCHAN);
4649 #undef PerlIO_setpos
4651 PerlIO_setpos(PerlIO *f, SV *pos)
4656 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4657 if (f && len == sizeof(Fpos_t)) {
4658 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4659 return fsetpos64(f, fpos);
4661 return fsetpos(f, fpos);
4665 SETERRNO(EINVAL, SS_IVCHAN);
4671 #undef PerlIO_getpos
4673 PerlIO_getpos(PerlIO *f, SV *pos)
4676 Off_t posn = PerlIO_tell(f);
4677 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4678 return (posn == (Off_t) - 1) ? -1 : 0;
4681 #undef PerlIO_getpos
4683 PerlIO_getpos(PerlIO *f, SV *pos)
4688 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4689 code = fgetpos64(f, &fpos);
4691 code = fgetpos(f, &fpos);
4693 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4698 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4701 vprintf(char *pat, char *args)
4703 _doprnt(pat, args, stdout);
4704 return 0; /* wrong, but perl doesn't use the return
4709 vfprintf(FILE *fd, char *pat, char *args)
4711 _doprnt(pat, args, fd);
4712 return 0; /* wrong, but perl doesn't use the return
4718 #ifndef PerlIO_vsprintf
4720 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4722 int val = vsprintf(s, fmt, ap);
4724 if (strlen(s) >= (STRLEN) n) {
4726 (void) PerlIO_puts(Perl_error_log,
4727 "panic: sprintf overflow - memory corrupted!\n");
4735 #ifndef PerlIO_sprintf
4737 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4742 result = PerlIO_vsprintf(s, n, fmt, ap);