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) */
2711 dupfd = PerlLIO_dup(fd);
2715 #ifdef SOCKS5_VERSION_NAME
2717 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2719 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2721 PerlSIO_fclose(stdio)
2725 /* We need to restore fd from the saved copy */
2726 if (PerlLIO_dup2(dupfd,fd) != fd)
2728 if (PerlLIO_close(dupfd) != 0)
2739 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2741 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2744 STDCHAR *buf = (STDCHAR *) vbuf;
2746 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2747 * stdio does not do that for fread()
2749 int ch = PerlSIO_fgetc(s);
2756 got = PerlSIO_fread(vbuf, 1, count, s);
2761 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2764 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2766 #ifdef STDIO_BUFFER_WRITABLE
2767 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2768 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2769 STDCHAR *base = PerlIO_get_base(f);
2770 SSize_t cnt = PerlIO_get_cnt(f);
2771 STDCHAR *ptr = PerlIO_get_ptr(f);
2772 SSize_t avail = ptr - base;
2774 if (avail > count) {
2778 Move(buf-avail,ptr,avail,STDCHAR);
2781 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2782 if (PerlSIO_feof(s) && unread >= 0)
2783 PerlSIO_clearerr(s);
2788 if (PerlIO_has_cntptr(f)) {
2789 /* We can get pointer to buffer but not its base
2790 Do ungetc() but check chars are ending up in the
2793 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2794 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2796 int ch = *--buf & 0xFF;
2797 if (ungetc(ch,s) != ch) {
2798 /* ungetc did not work */
2801 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2802 /* Did not change pointer as expected */
2803 fgetc(s); /* get char back again */
2813 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2819 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2821 return PerlSIO_fwrite(vbuf, 1, count,
2822 PerlIOSelf(f, PerlIOStdio)->stdio);
2826 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2828 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2829 return PerlSIO_fseek(stdio, offset, whence);
2833 PerlIOStdio_tell(pTHX_ PerlIO *f)
2835 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2836 return PerlSIO_ftell(stdio);
2840 PerlIOStdio_flush(pTHX_ PerlIO *f)
2842 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2843 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2844 return PerlSIO_fflush(stdio);
2849 * FIXME: This discards ungetc() and pre-read stuff which is not
2850 * right if this is just a "sync" from a layer above Suspect right
2851 * design is to do _this_ but not have layer above flush this
2852 * layer read-to-read
2855 * Not writeable - sync by attempting a seek
2858 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2866 PerlIOStdio_eof(pTHX_ PerlIO *f)
2868 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2872 PerlIOStdio_error(pTHX_ PerlIO *f)
2874 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2878 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2880 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2884 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2886 #ifdef HAS_SETLINEBUF
2887 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2889 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2895 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2897 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2898 return (STDCHAR*)PerlSIO_get_base(stdio);
2902 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2904 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2905 return PerlSIO_get_bufsiz(stdio);
2909 #ifdef USE_STDIO_PTR
2911 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2913 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2914 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2918 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2920 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2921 return PerlSIO_get_cnt(stdio);
2925 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2927 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2929 #ifdef STDIO_PTR_LVALUE
2930 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2931 #ifdef STDIO_PTR_LVAL_SETS_CNT
2932 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2933 assert(PerlSIO_get_cnt(stdio) == (cnt));
2936 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2938 * Setting ptr _does_ change cnt - we are done
2942 #else /* STDIO_PTR_LVALUE */
2944 #endif /* STDIO_PTR_LVALUE */
2947 * Now (or only) set cnt
2949 #ifdef STDIO_CNT_LVALUE
2950 PerlSIO_set_cnt(stdio, cnt);
2951 #else /* STDIO_CNT_LVALUE */
2952 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2953 PerlSIO_set_ptr(stdio,
2954 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2956 #else /* STDIO_PTR_LVAL_SETS_CNT */
2958 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2959 #endif /* STDIO_CNT_LVALUE */
2966 PerlIOStdio_fill(pTHX_ PerlIO *f)
2968 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2971 * fflush()ing read-only streams can cause trouble on some stdio-s
2973 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2974 if (PerlSIO_fflush(stdio) != 0)
2977 c = PerlSIO_fgetc(stdio);
2981 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2983 #ifdef STDIO_BUFFER_WRITABLE
2984 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2985 /* Fake ungetc() to the real buffer in case system's ungetc
2988 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2989 SSize_t cnt = PerlSIO_get_cnt(stdio);
2990 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2991 if (ptr == base+1) {
2992 *--ptr = (STDCHAR) c;
2993 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2994 if (PerlSIO_feof(stdio))
2995 PerlSIO_clearerr(stdio);
3001 if (PerlIO_has_cntptr(f)) {
3003 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3010 /* An ungetc()d char is handled separately from the regular
3011 * buffer, so we stuff it in the buffer ourselves.
3012 * Should never get called as should hit code above
3014 *(--((*stdio)->_ptr)) = (unsigned char) c;
3017 /* If buffer snoop scheme above fails fall back to
3020 if (PerlSIO_ungetc(c, stdio) != c)
3028 PerlIO_funcs PerlIO_stdio = {
3029 sizeof(PerlIO_funcs),
3031 sizeof(PerlIOStdio),
3032 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3036 PerlIOBase_binmode, /* binmode */
3050 PerlIOStdio_clearerr,
3051 PerlIOStdio_setlinebuf,
3053 PerlIOStdio_get_base,
3054 PerlIOStdio_get_bufsiz,
3059 #ifdef USE_STDIO_PTR
3060 PerlIOStdio_get_ptr,
3061 PerlIOStdio_get_cnt,
3062 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3063 PerlIOStdio_set_ptrcnt
3064 #else /* STDIO_PTR_LVALUE */
3066 #endif /* STDIO_PTR_LVALUE */
3067 #else /* USE_STDIO_PTR */
3071 #endif /* USE_STDIO_PTR */
3074 /* Note that calls to PerlIO_exportFILE() are reversed using
3075 * PerlIO_releaseFILE(), not importFILE. */
3077 PerlIO_exportFILE(PerlIO * f, const char *mode)
3081 if (PerlIOValid(f)) {
3084 if (!mode || !*mode) {
3085 mode = PerlIO_modestr(f, buf);
3087 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3090 /* De-link any lower layers so new :stdio sticks */
3092 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3093 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3095 /* Link previous lower layers under new one */
3099 /* restore layers list */
3109 PerlIO_findFILE(PerlIO *f)
3113 if (l->tab == &PerlIO_stdio) {
3114 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3117 l = *PerlIONext(&l);
3119 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3120 return PerlIO_exportFILE(f, Nullch);
3123 /* Use this to reverse PerlIO_exportFILE calls. */
3125 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3129 if (l->tab == &PerlIO_stdio) {
3130 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3131 if (s->stdio == f) {
3133 PerlIO_pop(aTHX_ p);
3142 /*--------------------------------------------------------------------------------------*/
3144 * perlio buffer layer
3148 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3150 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3151 int fd = PerlIO_fileno(f);
3152 if (fd >= 0 && PerlLIO_isatty(fd)) {
3153 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3155 if (*PerlIONext(f)) {
3156 Off_t posn = PerlIO_tell(PerlIONext(f));
3157 if (posn != (Off_t) - 1) {
3161 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3165 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3166 IV n, const char *mode, int fd, int imode, int perm,
3167 PerlIO *f, int narg, SV **args)
3169 if (PerlIOValid(f)) {
3170 PerlIO *next = PerlIONext(f);
3171 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3172 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3174 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3179 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3187 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3190 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3192 * if push fails during open, open fails. close will pop us.
3197 fd = PerlIO_fileno(f);
3198 if (init && fd == 2) {
3200 * Initial stderr is unbuffered
3202 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3204 #ifdef PERLIO_USING_CRLF
3205 # ifdef PERLIO_IS_BINMODE_FD
3206 if (PERLIO_IS_BINMODE_FD(fd))
3207 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3211 * do something about failing setmode()? --jhi
3213 PerlLIO_setmode(fd, O_BINARY);
3222 * This "flush" is akin to sfio's sync in that it handles files in either
3223 * read or write state
3226 PerlIOBuf_flush(pTHX_ PerlIO *f)
3228 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3230 PerlIO *n = PerlIONext(f);
3231 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3233 * write() the buffer
3235 STDCHAR *buf = b->buf;
3237 while (p < b->ptr) {
3238 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3242 else if (count < 0 || PerlIO_error(n)) {
3243 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3248 b->posn += (p - buf);
3250 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3251 STDCHAR *buf = PerlIO_get_base(f);
3253 * Note position change
3255 b->posn += (b->ptr - buf);
3256 if (b->ptr < b->end) {
3257 /* We did not consume all of it - try and seek downstream to
3258 our logical position
3260 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3261 /* Reload n as some layers may pop themselves on seek */
3262 b->posn = PerlIO_tell(n = PerlIONext(f));
3265 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3266 data is lost for good - so return saying "ok" having undone
3269 b->posn -= (b->ptr - buf);
3274 b->ptr = b->end = b->buf;
3275 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3276 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3277 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3283 PerlIOBuf_fill(pTHX_ PerlIO *f)
3285 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3286 PerlIO *n = PerlIONext(f);
3289 * Down-stream flush is defined not to loose read data so is harmless.
3290 * we would not normally be fill'ing if there was data left in anycase.
3292 if (PerlIO_flush(f) != 0)
3294 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3295 PerlIOBase_flush_linebuf(aTHX);
3298 PerlIO_get_base(f); /* allocate via vtable */
3300 b->ptr = b->end = b->buf;
3302 if (!PerlIOValid(n)) {
3303 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3307 if (PerlIO_fast_gets(n)) {
3309 * Layer below is also buffered. We do _NOT_ want to call its
3310 * ->Read() because that will loop till it gets what we asked for
3311 * which may hang on a pipe etc. Instead take anything it has to
3312 * hand, or ask it to fill _once_.
3314 avail = PerlIO_get_cnt(n);
3316 avail = PerlIO_fill(n);
3318 avail = PerlIO_get_cnt(n);
3320 if (!PerlIO_error(n) && PerlIO_eof(n))
3325 STDCHAR *ptr = PerlIO_get_ptr(n);
3326 SSize_t cnt = avail;
3327 if (avail > (SSize_t)b->bufsiz)
3329 Copy(ptr, b->buf, avail, STDCHAR);
3330 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3334 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3338 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3340 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3343 b->end = b->buf + avail;
3344 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3349 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3351 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3352 if (PerlIOValid(f)) {
3355 return PerlIOBase_read(aTHX_ f, vbuf, count);
3361 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3363 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3364 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3367 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3372 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3374 * Buffer is already a read buffer, we can overwrite any chars
3375 * which have been read back to buffer start
3377 avail = (b->ptr - b->buf);
3381 * Buffer is idle, set it up so whole buffer is available for
3385 b->end = b->buf + avail;
3387 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3389 * Buffer extends _back_ from where we are now
3391 b->posn -= b->bufsiz;
3393 if (avail > (SSize_t) count) {
3395 * If we have space for more than count, just move count
3403 * In simple stdio-like ungetc() case chars will be already
3406 if (buf != b->ptr) {
3407 Copy(buf, b->ptr, avail, STDCHAR);
3411 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3415 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3421 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3423 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3424 const STDCHAR *buf = (const STDCHAR *) vbuf;
3428 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3430 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3431 if (PerlIO_flush(f) != 0) {
3436 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3437 if ((SSize_t) count < avail)
3439 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3440 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3455 Copy(buf, b->ptr, avail, STDCHAR);
3462 if (b->ptr >= (b->buf + b->bufsiz))
3465 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3471 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3474 if ((code = PerlIO_flush(f)) == 0) {
3475 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3476 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3477 code = PerlIO_seek(PerlIONext(f), offset, whence);
3479 b->posn = PerlIO_tell(PerlIONext(f));
3486 PerlIOBuf_tell(pTHX_ PerlIO *f)
3488 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3490 * b->posn is file position where b->buf was read, or will be written
3492 Off_t posn = b->posn;
3493 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3494 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3496 /* As O_APPEND files are normally shared in some sense it is better
3501 /* when file is NOT shared then this is sufficient */
3502 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3504 posn = b->posn = PerlIO_tell(PerlIONext(f));
3508 * If buffer is valid adjust position by amount in buffer
3510 posn += (b->ptr - b->buf);
3516 PerlIOBuf_popped(pTHX_ PerlIO *f)
3518 IV code = PerlIOBase_popped(aTHX_ f);
3519 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3520 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3524 b->ptr = b->end = b->buf;
3525 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3530 PerlIOBuf_close(pTHX_ PerlIO *f)
3532 IV code = PerlIOBase_close(aTHX_ f);
3533 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3534 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3538 b->ptr = b->end = b->buf;
3539 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3544 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3546 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3553 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3555 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3558 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3559 return (b->end - b->ptr);
3564 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3566 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3571 Newz('B',b->buf,b->bufsiz, STDCHAR);
3573 b->buf = (STDCHAR *) & b->oneword;
3574 b->bufsiz = sizeof(b->oneword);
3583 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3585 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3588 return (b->end - b->buf);
3592 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3594 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3598 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3599 assert(PerlIO_get_cnt(f) == cnt);
3600 assert(b->ptr >= b->buf);
3602 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3606 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3608 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3613 PerlIO_funcs PerlIO_perlio = {
3614 sizeof(PerlIO_funcs),
3617 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3621 PerlIOBase_binmode, /* binmode */
3635 PerlIOBase_clearerr,
3636 PerlIOBase_setlinebuf,
3641 PerlIOBuf_set_ptrcnt,
3644 /*--------------------------------------------------------------------------------------*/
3646 * Temp layer to hold unread chars when cannot do it any other way
3650 PerlIOPending_fill(pTHX_ PerlIO *f)
3653 * Should never happen
3660 PerlIOPending_close(pTHX_ PerlIO *f)
3663 * A tad tricky - flush pops us, then we close new top
3666 return PerlIO_close(f);
3670 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3673 * A tad tricky - flush pops us, then we seek new top
3676 return PerlIO_seek(f, offset, whence);
3681 PerlIOPending_flush(pTHX_ PerlIO *f)
3683 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3684 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3688 PerlIO_pop(aTHX_ f);
3693 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3699 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3704 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3706 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3707 PerlIOl *l = PerlIOBase(f);
3709 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3710 * etc. get muddled when it changes mid-string when we auto-pop.
3712 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3713 (PerlIOBase(PerlIONext(f))->
3714 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3719 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3721 SSize_t avail = PerlIO_get_cnt(f);
3723 if ((SSize_t)count < avail)
3726 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3727 if (got >= 0 && got < (SSize_t)count) {
3729 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3730 if (more >= 0 || got == 0)
3736 PerlIO_funcs PerlIO_pending = {
3737 sizeof(PerlIO_funcs),
3740 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3741 PerlIOPending_pushed,
3744 PerlIOBase_binmode, /* binmode */
3753 PerlIOPending_close,
3754 PerlIOPending_flush,
3758 PerlIOBase_clearerr,
3759 PerlIOBase_setlinebuf,
3764 PerlIOPending_set_ptrcnt,
3769 /*--------------------------------------------------------------------------------------*/
3771 * crlf - translation On read translate CR,LF to "\n" we do this by
3772 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3773 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3777 PerlIOBuf base; /* PerlIOBuf stuff */
3778 STDCHAR *nl; /* Position of crlf we "lied" about in the
3783 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3786 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3787 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3789 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3790 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3791 PerlIOBase(f)->flags);
3798 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3800 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3805 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3806 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3808 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3809 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3811 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3816 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3817 b->end = b->ptr = b->buf + b->bufsiz;
3818 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3819 b->posn -= b->bufsiz;
3821 while (count > 0 && b->ptr > b->buf) {
3824 if (b->ptr - 2 >= b->buf) {
3847 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3849 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3852 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3853 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3854 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3855 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3857 while (nl < b->end && *nl != 0xd)
3859 if (nl < b->end && *nl == 0xd) {
3861 if (nl + 1 < b->end) {
3868 * Not CR,LF but just CR
3876 * Blast - found CR as last char in buffer
3881 * They may not care, defer work as long as
3885 return (nl - b->ptr);
3889 b->ptr++; /* say we have read it as far as
3890 * flush() is concerned */
3891 b->buf++; /* Leave space in front of buffer */
3892 /* Note as we have moved buf up flush's
3894 will naturally make posn point at CR
3896 b->bufsiz--; /* Buffer is thus smaller */
3897 code = PerlIO_fill(f); /* Fetch some more */
3898 b->bufsiz++; /* Restore size for next time */
3899 b->buf--; /* Point at space */
3900 b->ptr = nl = b->buf; /* Which is what we hand
3902 *nl = 0xd; /* Fill in the CR */
3904 goto test; /* fill() call worked */
3906 * CR at EOF - just fall through
3908 /* Should we clear EOF though ??? */
3913 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3919 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3921 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3922 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3928 if (ptr == b->end && *c->nl == 0xd) {
3929 /* Defered CR at end of buffer case - we lied about count */
3941 * Test code - delete when it works ...
3943 IV flags = PerlIOBase(f)->flags;
3944 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3945 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3946 /* Defered CR at end of buffer case - we lied about count */
3952 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3953 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3961 * They have taken what we lied about
3969 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3973 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3975 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3976 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3978 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3979 const STDCHAR *buf = (const STDCHAR *) vbuf;
3980 const STDCHAR *ebuf = buf + count;
3983 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3985 while (buf < ebuf) {
3986 STDCHAR *eptr = b->buf + b->bufsiz;
3987 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3988 while (buf < ebuf && b->ptr < eptr) {
3990 if ((b->ptr + 2) > eptr) {
3998 *(b->ptr)++ = 0xd; /* CR */
3999 *(b->ptr)++ = 0xa; /* LF */
4001 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4011 if (b->ptr >= eptr) {
4017 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4019 return (buf - (STDCHAR *) vbuf);
4024 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4026 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4031 return PerlIOBuf_flush(aTHX_ f);
4035 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4037 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4038 /* In text mode - flush any pending stuff and flip it */
4039 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4040 #ifndef PERLIO_USING_CRLF
4041 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4042 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4043 PerlIO_pop(aTHX_ f);
4050 PerlIO_funcs PerlIO_crlf = {
4051 sizeof(PerlIO_funcs),
4054 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4056 PerlIOBuf_popped, /* popped */
4058 PerlIOCrlf_binmode, /* binmode */
4062 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4064 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4065 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4073 PerlIOBase_clearerr,
4074 PerlIOBase_setlinebuf,
4079 PerlIOCrlf_set_ptrcnt,
4083 /*--------------------------------------------------------------------------------------*/
4085 * mmap as "buffer" layer
4089 PerlIOBuf base; /* PerlIOBuf stuff */
4090 Mmap_t mptr; /* Mapped address */
4091 Size_t len; /* mapped length */
4092 STDCHAR *bbuf; /* malloced buffer if map fails */
4095 static size_t page_size = 0;
4098 PerlIOMmap_map(pTHX_ PerlIO *f)
4100 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4101 IV flags = PerlIOBase(f)->flags;
4105 if (flags & PERLIO_F_CANREAD) {
4106 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4107 int fd = PerlIO_fileno(f);
4109 code = Fstat(fd, &st);
4110 if (code == 0 && S_ISREG(st.st_mode)) {
4111 SSize_t len = st.st_size - b->posn;
4115 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4117 SETERRNO(0, SS_NORMAL);
4118 # ifdef _SC_PAGESIZE
4119 page_size = sysconf(_SC_PAGESIZE);
4121 page_size = sysconf(_SC_PAGE_SIZE);
4123 if ((long) page_size < 0) {
4128 (void) SvUPGRADE(error, SVt_PV);
4129 msg = SvPVx(error, n_a);
4130 Perl_croak(aTHX_ "panic: sysconf: %s",
4135 "panic: sysconf: pagesize unknown");
4139 # ifdef HAS_GETPAGESIZE
4140 page_size = getpagesize();
4142 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4143 page_size = PAGESIZE; /* compiletime, bad */
4147 if ((IV) page_size <= 0)
4148 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4153 * This is a hack - should never happen - open should
4156 b->posn = PerlIO_tell(PerlIONext(f));
4158 posn = (b->posn / page_size) * page_size;
4159 len = st.st_size - posn;
4160 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4161 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4162 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4163 madvise(m->mptr, len, MADV_SEQUENTIAL);
4165 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4166 madvise(m->mptr, len, MADV_WILLNEED);
4168 PerlIOBase(f)->flags =
4169 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4170 b->end = ((STDCHAR *) m->mptr) + len;
4171 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4180 PerlIOBase(f)->flags =
4181 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4183 b->ptr = b->end = b->ptr;
4192 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4194 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4195 PerlIOBuf *b = &m->base;
4199 code = munmap(m->mptr, m->len);
4203 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4206 b->ptr = b->end = b->buf;
4207 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4213 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4215 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4216 PerlIOBuf *b = &m->base;
4217 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4219 * Already have a readbuffer in progress
4225 * We have a write buffer or flushed PerlIOBuf read buffer
4227 m->bbuf = b->buf; /* save it in case we need it again */
4228 b->buf = NULL; /* Clear to trigger below */
4231 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4234 * Map did not work - recover PerlIOBuf buffer if we have one
4239 b->ptr = b->end = b->buf;
4242 return PerlIOBuf_get_base(aTHX_ f);
4246 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4248 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4249 PerlIOBuf *b = &m->base;
4250 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4252 if (b->ptr && (b->ptr - count) >= b->buf
4253 && memEQ(b->ptr - count, vbuf, count)) {
4255 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4260 * Loose the unwritable mapped buffer
4264 * If flush took the "buffer" see if we have one from before
4266 if (!b->buf && m->bbuf)
4269 PerlIOBuf_get_base(aTHX_ f);
4273 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4277 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4279 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4280 PerlIOBuf *b = &m->base;
4281 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4283 * No, or wrong sort of, buffer
4286 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4290 * If unmap took the "buffer" see if we have one from before
4292 if (!b->buf && m->bbuf)
4295 PerlIOBuf_get_base(aTHX_ f);
4299 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4303 PerlIOMmap_flush(pTHX_ PerlIO *f)
4305 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4306 PerlIOBuf *b = &m->base;
4307 IV code = PerlIOBuf_flush(aTHX_ f);
4309 * Now we are "synced" at PerlIOBuf level
4316 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4321 * We seem to have a PerlIOBuf buffer which was not mapped
4322 * remember it in case we need one later
4331 PerlIOMmap_fill(pTHX_ PerlIO *f)
4333 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4334 IV code = PerlIO_flush(f);
4335 if (code == 0 && !b->buf) {
4336 code = PerlIOMmap_map(aTHX_ f);
4338 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4339 code = PerlIOBuf_fill(aTHX_ f);
4345 PerlIOMmap_close(pTHX_ PerlIO *f)
4347 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4348 PerlIOBuf *b = &m->base;
4349 IV code = PerlIO_flush(f);
4353 b->ptr = b->end = b->buf;
4355 if (PerlIOBuf_close(aTHX_ f) != 0)
4361 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4363 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4367 PerlIO_funcs PerlIO_mmap = {
4368 sizeof(PerlIO_funcs),
4371 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4375 PerlIOBase_binmode, /* binmode */
4389 PerlIOBase_clearerr,
4390 PerlIOBase_setlinebuf,
4391 PerlIOMmap_get_base,
4395 PerlIOBuf_set_ptrcnt,
4398 #endif /* HAS_MMAP */
4401 Perl_PerlIO_stdin(pTHX)
4404 PerlIO_stdstreams(aTHX);
4406 return &PL_perlio[1];
4410 Perl_PerlIO_stdout(pTHX)
4413 PerlIO_stdstreams(aTHX);
4415 return &PL_perlio[2];
4419 Perl_PerlIO_stderr(pTHX)
4422 PerlIO_stdstreams(aTHX);
4424 return &PL_perlio[3];
4427 /*--------------------------------------------------------------------------------------*/
4430 PerlIO_getname(PerlIO *f, char *buf)
4435 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4437 name = fgetname(stdio, buf);
4439 Perl_croak(aTHX_ "Don't know how to get file name");
4445 /*--------------------------------------------------------------------------------------*/
4447 * Functions which can be called on any kind of PerlIO implemented in
4451 #undef PerlIO_fdopen
4453 PerlIO_fdopen(int fd, const char *mode)
4456 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4461 PerlIO_open(const char *path, const char *mode)
4464 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4465 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4468 #undef Perlio_reopen
4470 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4473 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4474 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4479 PerlIO_getc(PerlIO *f)
4483 SSize_t count = PerlIO_read(f, buf, 1);
4485 return (unsigned char) buf[0];
4490 #undef PerlIO_ungetc
4492 PerlIO_ungetc(PerlIO *f, int ch)
4497 if (PerlIO_unread(f, &buf, 1) == 1)
4505 PerlIO_putc(PerlIO *f, int ch)
4509 return PerlIO_write(f, &buf, 1);
4514 PerlIO_puts(PerlIO *f, const char *s)
4517 STRLEN len = strlen(s);
4518 return PerlIO_write(f, s, len);
4521 #undef PerlIO_rewind
4523 PerlIO_rewind(PerlIO *f)
4526 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4530 #undef PerlIO_vprintf
4532 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4535 SV *sv = newSVpvn("", 0);
4541 Perl_va_copy(ap, apc);
4542 sv_vcatpvf(sv, fmt, &apc);
4544 sv_vcatpvf(sv, fmt, &ap);
4547 wrote = PerlIO_write(f, s, len);
4552 #undef PerlIO_printf
4554 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4559 result = PerlIO_vprintf(f, fmt, ap);
4564 #undef PerlIO_stdoutf
4566 PerlIO_stdoutf(const char *fmt, ...)
4572 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4577 #undef PerlIO_tmpfile
4579 PerlIO_tmpfile(void)
4582 * I have no idea how portable mkstemp() is ...
4584 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4587 FILE *stdio = PerlSIO_tmpfile();
4589 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4590 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4597 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4598 int fd = mkstemp(SvPVX(sv));
4601 f = PerlIO_fdopen(fd, "w+");
4603 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4605 PerlLIO_unlink(SvPVX(sv));
4615 #endif /* USE_SFIO */
4616 #endif /* PERLIO_IS_STDIO */
4618 /*======================================================================================*/
4620 * Now some functions in terms of above which may be needed even if we are
4621 * not in true PerlIO mode
4625 #undef PerlIO_setpos
4627 PerlIO_setpos(PerlIO *f, SV *pos)
4632 Off_t *posn = (Off_t *) SvPV(pos, len);
4633 if (f && len == sizeof(Off_t))
4634 return PerlIO_seek(f, *posn, SEEK_SET);
4636 SETERRNO(EINVAL, SS_IVCHAN);
4640 #undef PerlIO_setpos
4642 PerlIO_setpos(PerlIO *f, SV *pos)
4647 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4648 if (f && len == sizeof(Fpos_t)) {
4649 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4650 return fsetpos64(f, fpos);
4652 return fsetpos(f, fpos);
4656 SETERRNO(EINVAL, SS_IVCHAN);
4662 #undef PerlIO_getpos
4664 PerlIO_getpos(PerlIO *f, SV *pos)
4667 Off_t posn = PerlIO_tell(f);
4668 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4669 return (posn == (Off_t) - 1) ? -1 : 0;
4672 #undef PerlIO_getpos
4674 PerlIO_getpos(PerlIO *f, SV *pos)
4679 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4680 code = fgetpos64(f, &fpos);
4682 code = fgetpos(f, &fpos);
4684 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4689 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4692 vprintf(char *pat, char *args)
4694 _doprnt(pat, args, stdout);
4695 return 0; /* wrong, but perl doesn't use the return
4700 vfprintf(FILE *fd, char *pat, char *args)
4702 _doprnt(pat, args, fd);
4703 return 0; /* wrong, but perl doesn't use the return
4709 #ifndef PerlIO_vsprintf
4711 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4713 int val = vsprintf(s, fmt, ap);
4715 if (strlen(s) >= (STRLEN) n) {
4717 (void) PerlIO_puts(Perl_error_log,
4718 "panic: sprintf overflow - memory corrupted!\n");
4726 #ifndef PerlIO_sprintf
4728 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4733 result = PerlIO_vsprintf(s, n, fmt, ap);