2 * perlio.c Copyright (c) 1996-2002, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14 * at the dispatch tables, even when we do not need it for other reasons.
15 * Invent a dSYS macro to abstract this out
17 #ifdef PERL_IMPLICIT_SYS
30 #define PERLIO_NOT_STDIO 0
31 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
37 * This file provides those parts of PerlIO abstraction
38 * which are not #defined in perlio.h.
39 * Which these are depends on various Configure #ifdef's
43 #define PERL_IN_PERLIO_C
46 #ifdef PERL_IMPLICIT_CONTEXT
54 perlsio_binmode(FILE *fp, int iotype, int mode)
57 * This used to be contents of do_binmode in doio.c
60 # if defined(atarist) || defined(__MINT__)
63 ((FILE *) fp)->_flag |= _IOBIN;
65 ((FILE *) fp)->_flag &= ~_IOBIN;
72 if (PerlLIO_setmode(fp, mode) != -1) {
74 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
76 # if defined(WIN32) && defined(__BORLANDC__)
78 * The translation mode of the stream is maintained independent of
79 * the translation mode of the fd in the Borland RTL (heavy
80 * digging through their runtime sources reveal). User has to set
81 * the mode explicitly for the stream (though they don't document
82 * this anywhere). GSAR 97-5-24
96 # if defined(USEMYBINMODE)
98 if (my_binmode(fp, iotype, mode) != FALSE)
109 #define O_ACCMODE 3 /* Assume traditional implementation */
113 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
115 int result = rawmode & O_ACCMODE;
120 ptype = IoTYPE_RDONLY;
123 ptype = IoTYPE_WRONLY;
131 *writing = (result != O_RDONLY);
133 if (result == O_RDONLY) {
137 else if (rawmode & O_APPEND) {
139 if (result != O_WRONLY)
144 if (result == O_WRONLY)
151 if (rawmode & O_BINARY)
157 #ifndef PERLIO_LAYERS
159 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
161 if (!names || !*names
162 || strEQ(names, ":crlf")
163 || strEQ(names, ":raw")
164 || strEQ(names, ":bytes")
168 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
176 PerlIO_destruct(pTHX)
181 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
186 return perlsio_binmode(fp, iotype, mode);
191 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
196 #ifdef PERL_IMPLICIT_SYS
197 return PerlSIO_fdupopen(f);
200 return win32_fdupopen(f);
203 int fd = PerlLIO_dup(PerlIO_fileno(f));
206 int omode = fcntl(fd, F_GETFL);
208 omode = djgpp_get_stream_mode(f);
210 PerlIO_intmode2str(omode,mode,NULL);
211 /* the r+ is a hack */
212 return PerlIO_fdopen(fd, mode);
217 SETERRNO(EBADF, SS$_IVCHAN);
227 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
231 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
232 int imode, int perm, PerlIO *old, int narg, SV **args)
236 Perl_croak(aTHX_ "More than one argument to open");
238 if (*args == &PL_sv_undef)
239 return PerlIO_tmpfile();
241 char *name = SvPV_nolen(*args);
243 fd = PerlLIO_open3(name, imode, perm);
245 return PerlIO_fdopen(fd, (char *) mode + 1);
248 return PerlIO_reopen(name, mode, old);
251 return PerlIO_open(name, mode);
256 return PerlIO_fdopen(fd, (char *) mode);
261 XS(XS_PerlIO__Layer__find)
265 Perl_croak(aTHX_ "Usage class->find(name[,load])");
267 char *name = SvPV_nolen(ST(1));
268 ST(0) = (strEQ(name, "crlf")
269 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
276 Perl_boot_core_PerlIO(pTHX)
278 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
284 #ifdef PERLIO_IS_STDIO
290 * Does nothing (yet) except force this file to be included in perl
291 * binary. That allows this file to force inclusion of other functions
292 * that may be required by loadable extensions e.g. for
293 * FileHandle::tmpfile
297 #undef PerlIO_tmpfile
304 #else /* PERLIO_IS_STDIO */
312 * This section is just to make sure these functions get pulled in from
316 #undef PerlIO_tmpfile
327 * Force this file to be included in perl binary. Which allows this
328 * file to force inclusion of other functions that may be required by
329 * loadable extensions e.g. for FileHandle::tmpfile
333 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
334 * results in a lot of lseek()s to regular files and lot of small
337 sfset(sfstdout, SF_SHARE, 0);
341 PerlIO_importFILE(FILE *stdio, const char *mode)
343 int fd = fileno(stdio);
344 if (!mode || !*mode) {
347 return PerlIO_fdopen(fd, mode);
351 PerlIO_findFILE(PerlIO *pio)
353 int fd = PerlIO_fileno(pio);
354 FILE *f = fdopen(fd, "r+");
356 if (!f && errno == EINVAL)
358 if (!f && errno == EINVAL)
365 /*======================================================================================*/
367 * Implement all the PerlIO interface ourselves.
373 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
380 #include <sys/mman.h>
384 void PerlIO_debug(const char *fmt, ...)
385 __attribute__ ((format(__printf__, 1, 2)));
388 PerlIO_debug(const char *fmt, ...)
395 char *s = PerlEnv_getenv("PERLIO_DEBUG");
397 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
404 /* Use fixed buffer as sv_catpvf etc. needs SVs */
408 s = CopFILE(PL_curcop);
411 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
412 len = strlen(buffer);
413 vsprintf(buffer+len, fmt, ap);
414 PerlLIO_write(dbg, buffer, strlen(buffer));
416 SV *sv = newSVpvn("", 0);
419 s = CopFILE(PL_curcop);
422 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
423 (IV) CopLINE(PL_curcop));
424 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
427 PerlLIO_write(dbg, s, len);
434 /*--------------------------------------------------------------------------------------*/
437 * Inner level routines
441 * Table of pointers to the PerlIO structs (malloc'ed)
443 #define PERLIO_TABLE_SIZE 64
446 PerlIO_allocate(pTHX)
449 * Find a free slot in the table, allocating new table as necessary
454 while ((f = *last)) {
456 last = (PerlIO **) (f);
457 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
463 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
471 #undef PerlIO_fdupopen
473 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
475 if (PerlIOValid(f)) {
476 PerlIO_funcs *tab = PerlIOBase(f)->tab;
478 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
479 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
483 SETERRNO(EBADF, SS$_IVCHAN);
489 PerlIO_cleantable(pTHX_ PerlIO **tablep)
491 PerlIO *table = *tablep;
494 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
495 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
496 PerlIO *f = table + i;
508 PerlIO_list_alloc(pTHX)
511 Newz('L', list, 1, PerlIO_list_t);
517 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
520 if (--list->refcnt == 0) {
523 for (i = 0; i < list->cur; i++) {
524 if (list->array[i].arg)
525 SvREFCNT_dec(list->array[i].arg);
527 Safefree(list->array);
535 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
538 if (list->cur >= list->len) {
541 Renew(list->array, list->len, PerlIO_pair_t);
543 New('l', list->array, list->len, PerlIO_pair_t);
545 p = &(list->array[list->cur++]);
547 if ((p->arg = arg)) {
553 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
555 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
558 list = PerlIO_list_alloc(aTHX);
559 for (i=0; i < proto->cur; i++) {
561 if (proto->array[i].arg)
562 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
563 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
570 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
573 PerlIO **table = &proto->Iperlio;
576 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
577 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
578 PerlIO_allocate(aTHX); /* root slot is never used */
579 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
580 while ((f = *table)) {
582 table = (PerlIO **) (f++);
583 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
585 (void) fp_dup(f, 0, param);
594 PerlIO_destruct(pTHX)
596 PerlIO **table = &PL_perlio;
599 PerlIO_debug("Destruct %p\n",aTHX);
601 while ((f = *table)) {
603 table = (PerlIO **) (f++);
604 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
608 if (l->tab->kind & PERLIO_K_DESTRUCT) {
609 PerlIO_debug("Destruct popping %s\n", l->tab->name);
623 PerlIO_pop(pTHX_ PerlIO *f)
627 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
628 if (l->tab->Popped) {
630 * If popped returns non-zero do not free its layer structure
631 * it has either done so itself, or it is shared and still in
634 if ((*l->tab->Popped) (aTHX_ f) != 0)
642 /*--------------------------------------------------------------------------------------*/
644 * XS Interface for perl code
648 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
651 if ((SSize_t) len <= 0)
653 for (i = 0; i < PL_known_layers->cur; i++) {
654 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
655 if (memEQ(f->name, name, len)) {
656 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
660 if (load && PL_subname && PL_def_layerlist
661 && PL_def_layerlist->cur >= 2) {
662 SV *pkgsv = newSVpvn("PerlIO", 6);
663 SV *layer = newSVpvn(name, len);
666 * The two SVs are magically freed by load_module
668 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
670 return PerlIO_find_layer(aTHX_ name, len, 0);
672 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
676 #ifdef USE_ATTRIBUTES_FOR_PERLIO
679 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
682 IO *io = GvIOn((GV *) SvRV(sv));
683 PerlIO *ifp = IoIFP(io);
684 PerlIO *ofp = IoOFP(io);
685 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
691 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
694 IO *io = GvIOn((GV *) SvRV(sv));
695 PerlIO *ifp = IoIFP(io);
696 PerlIO *ofp = IoOFP(io);
697 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
703 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
705 Perl_warn(aTHX_ "clear %" SVf, sv);
710 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
712 Perl_warn(aTHX_ "free %" SVf, sv);
716 MGVTBL perlio_vtab = {
724 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
727 SV *sv = SvRV(ST(1));
732 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
734 mg = mg_find(sv, PERL_MAGIC_ext);
735 mg->mg_virtual = &perlio_vtab;
737 Perl_warn(aTHX_ "attrib %" SVf, sv);
738 for (i = 2; i < items; i++) {
740 const char *name = SvPV(ST(i), len);
741 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
743 av_push(av, SvREFCNT_inc(layer));
754 #endif /* USE_ATTIBUTES_FOR_PERLIO */
757 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
759 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
760 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
764 XS(XS_PerlIO__Layer__find)
768 Perl_croak(aTHX_ "Usage class->find(name[,load])");
771 char *name = SvPV(ST(1), len);
772 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
773 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
775 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
782 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
784 if (!PL_known_layers)
785 PL_known_layers = PerlIO_list_alloc(aTHX);
786 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
787 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
791 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
794 const char *s = names;
796 while (isSPACE(*s) || *s == ':')
801 const char *as = Nullch;
803 if (!isIDFIRST(*s)) {
805 * Message is consistent with how attribute lists are
806 * passed. Even though this means "foo : : bar" is
807 * seen as an invalid separator character.
809 char q = ((*s == '\'') ? '"' : '\'');
810 if (ckWARN(WARN_LAYER))
811 Perl_warner(aTHX_ packWARN(WARN_LAYER),
812 "perlio: invalid separator character %c%c%c in layer specification list %s",
814 SETERRNO(EINVAL, LIB$_INVARG);
819 } while (isALNUM(*e));
835 * It's a nul terminated string, not allowed
836 * to \ the terminating null. Anything other
837 * character is passed over.
847 if (ckWARN(WARN_LAYER))
848 Perl_warner(aTHX_ packWARN(WARN_LAYER),
849 "perlio: argument list not closed for layer \"%.*s\"",
861 bool warn_layer = ckWARN(WARN_LAYER);
862 PerlIO_funcs *layer =
863 PerlIO_find_layer(aTHX_ s, llen, 1);
865 PerlIO_list_push(aTHX_ av, layer,
872 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
885 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
887 PerlIO_funcs *tab = &PerlIO_perlio;
888 #ifdef PERLIO_USING_CRLF
891 if (PerlIO_stdio.Set_ptrcnt)
894 PerlIO_debug("Pushing %s\n", tab->name);
895 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
900 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
902 return av->array[n].arg;
906 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
908 if (n >= 0 && n < av->cur) {
909 PerlIO_debug("Layer %" IVdf " is %s\n", n,
910 av->array[n].funcs->name);
911 return av->array[n].funcs;
914 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
919 PerlIO_default_layers(pTHX)
921 if (!PL_def_layerlist) {
922 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
923 PerlIO_funcs *osLayer = &PerlIO_unix;
924 PL_def_layerlist = PerlIO_list_alloc(aTHX);
925 PerlIO_define_layer(aTHX_ & PerlIO_unix);
926 #if defined(WIN32) && !defined(UNDER_CE)
927 PerlIO_define_layer(aTHX_ & PerlIO_win32);
929 osLayer = &PerlIO_win32;
932 PerlIO_define_layer(aTHX_ & PerlIO_raw);
933 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
934 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
935 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
937 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
939 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
940 PerlIO_define_layer(aTHX_ & PerlIO_byte);
941 PerlIO_list_push(aTHX_ PL_def_layerlist,
942 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
945 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
948 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
951 if (PL_def_layerlist->cur < 2) {
952 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
954 return PL_def_layerlist;
958 Perl_boot_core_PerlIO(pTHX)
960 #ifdef USE_ATTRIBUTES_FOR_PERLIO
961 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
964 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
968 PerlIO_default_layer(pTHX_ I32 n)
970 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
973 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
976 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
977 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
980 PerlIO_stdstreams(pTHX)
983 PerlIO_allocate(aTHX);
984 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
985 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
986 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
991 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
993 if (tab->fsize != sizeof(PerlIO_funcs)) {
995 Perl_croak(aTHX_ "Layer does not match this perl");
999 if (tab->size < sizeof(PerlIOl)) {
1002 /* Real layer with a data area */
1003 Newc('L',l,tab->size,char,PerlIOl);
1005 Zero(l, tab->size, char);
1009 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1010 (mode) ? mode : "(Null)", (void*)arg);
1011 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1012 PerlIO_pop(aTHX_ f);
1018 /* Pseudo-layer where push does its own stack adjust */
1019 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1020 (mode) ? mode : "(Null)", (void*)arg);
1021 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1029 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1031 PerlIO_pop(aTHX_ f);
1034 PerlIO_pop(aTHX_ f);
1041 PerlIOBase_binmode(pTHX_ PerlIO *f)
1043 if (PerlIOValid(f)) {
1044 /* Is layer suitable for raw stream ? */
1045 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1046 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1047 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1050 /* Not suitable - pop it */
1051 PerlIO_pop(aTHX_ f);
1059 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1062 if (PerlIOValid(f)) {
1067 * Strip all layers that are not suitable for a raw stream
1070 while (t && (l = *t)) {
1071 if (l->tab->Binmode) {
1072 /* Has a handler - normal case */
1073 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1075 /* Layer still there - move down a layer */
1084 /* No handler - pop it */
1085 PerlIO_pop(aTHX_ t);
1088 if (PerlIOValid(f)) {
1089 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1097 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1098 PerlIO_list_t *layers, IV n, IV max)
1102 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1104 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1115 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1119 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1120 code = PerlIO_parse_layers(aTHX_ layers, names);
1122 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1124 PerlIO_list_free(aTHX_ layers);
1130 /*--------------------------------------------------------------------------------------*/
1132 * Given the abstraction above the public API functions
1136 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1138 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1139 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1140 (names) ? names : "(Null)");
1142 /* Do not flush etc. if (e.g.) switching encodings.
1143 if a pushed layer knows it needs to flush lower layers
1144 (for example :unix which is never going to call them)
1145 it can do the flush when it is pushed.
1147 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1150 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1151 #ifdef PERLIO_USING_CRLF
1152 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1153 O_BINARY so we can look for it in mode.
1155 if (!(mode & O_BINARY)) {
1157 /* FIXME?: Looking down the layer stack seems wrong,
1158 but is a way of reaching past (say) an encoding layer
1159 to flip CRLF-ness of the layer(s) below
1162 /* Perhaps we should turn on bottom-most aware layer
1163 e.g. Ilya's idea that UNIX TTY could serve
1165 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1166 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1167 /* Not in text mode - flush any pending stuff and flip it */
1169 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1171 /* Only need to turn it on in one layer so we are done */
1176 /* Not finding a CRLF aware layer presumably means we are binary
1177 which is not what was requested - so we failed
1178 We _could_ push :crlf layer but so could caller
1183 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1184 So code that used to be here is now in PerlIORaw_pushed().
1186 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1191 PerlIO__close(pTHX_ PerlIO *f)
1194 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1196 SETERRNO(EBADF, SS$_IVCHAN);
1202 Perl_PerlIO_close(pTHX_ PerlIO *f)
1205 if (PerlIOValid(f)) {
1206 code = (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1208 PerlIO_pop(aTHX_ f);
1215 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1218 return (*PerlIOBase(f)->tab->Fileno) (aTHX_ f);
1220 SETERRNO(EBADF, SS$_IVCHAN);
1226 PerlIO_context_layers(pTHX_ const char *mode)
1228 const char *type = NULL;
1230 * Need to supply default layer info from open.pm
1233 SV *layers = PL_curcop->cop_io;
1236 type = SvPV(layers, len);
1237 if (type && mode[0] != 'r') {
1239 * Skip to write part
1241 const char *s = strchr(type, 0);
1242 if (s && (STRLEN)(s - type) < len) {
1251 static PerlIO_funcs *
1252 PerlIO_layer_from_ref(pTHX_ SV *sv)
1255 * For any scalar type load the handler which is bundled with perl
1257 if (SvTYPE(sv) < SVt_PVAV)
1258 return PerlIO_find_layer(aTHX_ "Scalar", 6, 1);
1261 * For other types allow if layer is known but don't try and load it
1263 switch (SvTYPE(sv)) {
1265 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1267 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1269 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1271 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1277 PerlIO_resolve_layers(pTHX_ const char *layers,
1278 const char *mode, int narg, SV **args)
1280 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1283 PerlIO_stdstreams(aTHX);
1287 * If it is a reference but not an object see if we have a handler
1290 if (SvROK(arg) && !sv_isobject(arg)) {
1291 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1293 def = PerlIO_list_alloc(aTHX);
1294 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1298 * Don't fail if handler cannot be found :Via(...) etc. may do
1299 * something sensible else we will just stringfy and open
1305 layers = PerlIO_context_layers(aTHX_ mode);
1306 if (layers && *layers) {
1310 av = PerlIO_list_alloc(aTHX);
1311 for (i = 0; i < def->cur; i++) {
1312 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1319 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1323 PerlIO_list_free(aTHX_ av);
1324 return (PerlIO_list_t *) NULL;
1335 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1336 int imode, int perm, PerlIO *f, int narg, SV **args)
1338 if (!f && narg == 1 && *args == &PL_sv_undef) {
1339 if ((f = PerlIO_tmpfile())) {
1341 layers = PerlIO_context_layers(aTHX_ mode);
1342 if (layers && *layers)
1343 PerlIO_apply_layers(aTHX_ f, mode, layers);
1347 PerlIO_list_t *layera = NULL;
1349 PerlIO_funcs *tab = NULL;
1350 if (PerlIOValid(f)) {
1352 * This is "reopen" - it is not tested as perl does not use it
1356 layera = PerlIO_list_alloc(aTHX);
1358 SV *arg = (l->tab->Getarg)
1359 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1361 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1362 l = *PerlIONext(&l);
1366 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1372 * Start at "top" of layer stack
1374 n = layera->cur - 1;
1376 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1385 * Found that layer 'n' can do opens - call it
1387 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1388 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1390 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1391 tab->name, layers, mode, fd, imode, perm,
1392 (void*)f, narg, (void*)args);
1393 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1396 if (n + 1 < layera->cur) {
1398 * More layers above the one that we used to open -
1401 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1402 /* If pushing layers fails close the file */
1409 PerlIO_list_free(aTHX_ layera);
1416 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1419 return (*PerlIOBase(f)->tab->Read) (aTHX_ f, vbuf, count);
1421 SETERRNO(EBADF, SS$_IVCHAN);
1427 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1430 return (*PerlIOBase(f)->tab->Unread) (aTHX_ f, vbuf, count);
1432 SETERRNO(EBADF, SS$_IVCHAN);
1438 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1441 return (*PerlIOBase(f)->tab->Write) (aTHX_ f, vbuf, count);
1443 SETERRNO(EBADF, SS$_IVCHAN);
1449 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1452 return (*PerlIOBase(f)->tab->Seek) (aTHX_ f, offset, whence);
1454 SETERRNO(EBADF, SS$_IVCHAN);
1460 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1463 return (*PerlIOBase(f)->tab->Tell) (aTHX_ f);
1465 SETERRNO(EBADF, SS$_IVCHAN);
1471 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1475 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1476 if (tab && tab->Flush) {
1477 return (*tab->Flush) (aTHX_ f);
1480 PerlIO_debug("Cannot flush f=%p :%s\n", (void*)f, tab->name);
1481 SETERRNO(EBADF, SS$_IVCHAN);
1486 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1487 SETERRNO(EBADF, SS$_IVCHAN);
1493 * Is it good API design to do flush-all on NULL, a potentially
1494 * errorneous input? Maybe some magical value (PerlIO*
1495 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1496 * things on fflush(NULL), but should we be bound by their design
1499 PerlIO **table = &PL_perlio;
1501 while ((f = *table)) {
1503 table = (PerlIO **) (f++);
1504 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1505 if (*f && PerlIO_flush(f) != 0)
1515 PerlIOBase_flush_linebuf(pTHX)
1517 PerlIO **table = &PL_perlio;
1519 while ((f = *table)) {
1521 table = (PerlIO **) (f++);
1522 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1525 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1526 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1534 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1537 return (*PerlIOBase(f)->tab->Fill) (aTHX_ f);
1539 SETERRNO(EBADF, SS$_IVCHAN);
1545 PerlIO_isutf8(PerlIO *f)
1548 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1550 SETERRNO(EBADF, SS$_IVCHAN);
1556 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1559 return (*PerlIOBase(f)->tab->Eof) (aTHX_ f);
1561 SETERRNO(EBADF, SS$_IVCHAN);
1567 Perl_PerlIO_error(pTHX_ PerlIO *f)
1570 return (*PerlIOBase(f)->tab->Error) (aTHX_ f);
1572 SETERRNO(EBADF, SS$_IVCHAN);
1578 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1581 (*PerlIOBase(f)->tab->Clearerr) (aTHX_ f);
1583 SETERRNO(EBADF, SS$_IVCHAN);
1587 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1590 (*PerlIOBase(f)->tab->Setlinebuf) (aTHX_ f);
1592 SETERRNO(EBADF, SS$_IVCHAN);
1596 PerlIO_has_base(PerlIO *f)
1598 if (PerlIOValid(f)) {
1599 return (PerlIOBase(f)->tab->Get_base != NULL);
1605 PerlIO_fast_gets(PerlIO *f)
1607 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1608 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1609 return (tab->Set_ptrcnt != NULL);
1615 PerlIO_has_cntptr(PerlIO *f)
1617 if (PerlIOValid(f)) {
1618 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1619 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1625 PerlIO_canset_cnt(PerlIO *f)
1627 if (PerlIOValid(f)) {
1628 PerlIOl *l = PerlIOBase(f);
1629 return (l->tab->Set_ptrcnt != NULL);
1635 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1638 return (*PerlIOBase(f)->tab->Get_base) (aTHX_ f);
1643 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1646 return (*PerlIOBase(f)->tab->Get_bufsiz) (aTHX_ f);
1651 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1653 if (PerlIOValid(f)) {
1654 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1655 if (tab->Get_ptr == NULL)
1657 return (*tab->Get_ptr) (aTHX_ f);
1663 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1665 if (PerlIOValid(f)) {
1666 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1667 if (tab->Get_cnt == NULL)
1669 return (*tab->Get_cnt) (aTHX_ f);
1675 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1677 if (PerlIOValid(f)) {
1678 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, NULL, cnt);
1683 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1685 if (PerlIOValid(f)) {
1686 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1687 if (tab->Set_ptrcnt == NULL) {
1688 Perl_croak(aTHX_ "PerlIO buffer snooping abuse");
1690 (*PerlIOBase(f)->tab->Set_ptrcnt) (aTHX_ f, ptr, cnt);
1694 /*--------------------------------------------------------------------------------------*/
1696 * utf8 and raw dummy layers
1700 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1702 if (PerlIOValid(f)) {
1703 if (tab->kind & PERLIO_K_UTF8)
1704 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1706 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1712 PerlIO_funcs PerlIO_utf8 = {
1713 sizeof(PerlIO_funcs),
1716 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1734 NULL, /* get_base */
1735 NULL, /* get_bufsiz */
1738 NULL, /* set_ptrcnt */
1741 PerlIO_funcs PerlIO_byte = {
1742 sizeof(PerlIO_funcs),
1763 NULL, /* get_base */
1764 NULL, /* get_bufsiz */
1767 NULL, /* set_ptrcnt */
1771 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1772 IV n, const char *mode, int fd, int imode, int perm,
1773 PerlIO *old, int narg, SV **args)
1775 PerlIO_funcs *tab = PerlIO_default_btm();
1776 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1780 PerlIO_funcs PerlIO_raw = {
1781 sizeof(PerlIO_funcs),
1802 NULL, /* get_base */
1803 NULL, /* get_bufsiz */
1806 NULL, /* set_ptrcnt */
1808 /*--------------------------------------------------------------------------------------*/
1809 /*--------------------------------------------------------------------------------------*/
1811 * "Methods" of the "base class"
1815 PerlIOBase_fileno(pTHX_ PerlIO *f)
1817 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1821 PerlIO_modestr(PerlIO *f, char *buf)
1824 IV flags = PerlIOBase(f)->flags;
1825 if (flags & PERLIO_F_APPEND) {
1827 if (flags & PERLIO_F_CANREAD) {
1831 else if (flags & PERLIO_F_CANREAD) {
1833 if (flags & PERLIO_F_CANWRITE)
1836 else if (flags & PERLIO_F_CANWRITE) {
1838 if (flags & PERLIO_F_CANREAD) {
1842 #ifdef PERLIO_USING_CRLF
1843 if (!(flags & PERLIO_F_CRLF))
1851 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1853 PerlIOl *l = PerlIOBase(f);
1855 const char *omode = mode;
1858 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1859 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1860 if (tab->Set_ptrcnt != NULL)
1861 l->flags |= PERLIO_F_FASTGETS;
1863 if (*mode == '#' || *mode == 'I')
1867 l->flags |= PERLIO_F_CANREAD;
1870 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1873 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1876 SETERRNO(EINVAL, LIB$_INVARG);
1882 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1885 l->flags &= ~PERLIO_F_CRLF;
1888 l->flags |= PERLIO_F_CRLF;
1891 SETERRNO(EINVAL, LIB$_INVARG);
1898 l->flags |= l->next->flags &
1899 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1904 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1905 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1906 l->flags, PerlIO_modestr(f, temp));
1912 PerlIOBase_popped(pTHX_ PerlIO *f)
1918 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1921 * Save the position as current head considers it
1923 Off_t old = PerlIO_tell(f);
1925 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
1926 PerlIOSelf(f, PerlIOBuf)->posn = old;
1927 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
1932 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1934 STDCHAR *buf = (STDCHAR *) vbuf;
1936 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
1939 SSize_t avail = PerlIO_get_cnt(f);
1942 take = ((SSize_t)count < avail) ? count : avail;
1944 STDCHAR *ptr = PerlIO_get_ptr(f);
1945 Copy(ptr, buf, take, STDCHAR);
1946 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
1950 if (count > 0 && avail <= 0) {
1951 if (PerlIO_fill(f) != 0)
1955 return (buf - (STDCHAR *) vbuf);
1961 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
1967 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
1973 PerlIOBase_close(pTHX_ PerlIO *f)
1976 PerlIO *n = PerlIONext(f);
1977 if (PerlIO_flush(f) != 0)
1979 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
1981 PerlIOBase(f)->flags &=
1982 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
1987 PerlIOBase_eof(pTHX_ PerlIO *f)
1989 if (PerlIOValid(f)) {
1990 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
1996 PerlIOBase_error(pTHX_ PerlIO *f)
1998 if (PerlIOValid(f)) {
1999 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2005 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2007 if (PerlIOValid(f)) {
2008 PerlIO *n = PerlIONext(f);
2009 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2016 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2018 if (PerlIOValid(f)) {
2019 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2024 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2030 return sv_dup(arg, param);
2033 return newSVsv(arg);
2036 return newSVsv(arg);
2041 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2043 PerlIO *nexto = PerlIONext(o);
2044 if (PerlIOValid(nexto)) {
2045 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2046 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2049 PerlIO_funcs *self = PerlIOBase(o)->tab;
2052 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2053 self->name, (void*)f, (void*)o, (void*)param);
2055 arg = (*self->Getarg)(aTHX_ o,param,flags);
2057 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2065 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2067 perl_mutex PerlIO_mutex;
2069 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2074 /* Place holder for stdstreams call ??? */
2076 MUTEX_INIT(&PerlIO_mutex);
2081 PerlIOUnix_refcnt_inc(int fd)
2083 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2085 MUTEX_LOCK(&PerlIO_mutex);
2087 PerlIO_fd_refcnt[fd]++;
2088 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2090 MUTEX_UNLOCK(&PerlIO_mutex);
2096 PerlIOUnix_refcnt_dec(int fd)
2099 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2101 MUTEX_LOCK(&PerlIO_mutex);
2103 cnt = --PerlIO_fd_refcnt[fd];
2104 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2106 MUTEX_UNLOCK(&PerlIO_mutex);
2113 PerlIO_cleanup(pTHX)
2117 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2119 PerlIO_debug("Cleanup layers\n");
2121 /* Raise STDIN..STDERR refcount so we don't close them */
2122 for (i=0; i < 3; i++)
2123 PerlIOUnix_refcnt_inc(i);
2124 PerlIO_cleantable(aTHX_ &PL_perlio);
2125 /* Restore STDIN..STDERR refcount */
2126 for (i=0; i < 3; i++)
2127 PerlIOUnix_refcnt_dec(i);
2129 if (PL_known_layers) {
2130 PerlIO_list_free(aTHX_ PL_known_layers);
2131 PL_known_layers = NULL;
2133 if(PL_def_layerlist) {
2134 PerlIO_list_free(aTHX_ PL_def_layerlist);
2135 PL_def_layerlist = NULL;
2141 /*--------------------------------------------------------------------------------------*/
2143 * Bottom-most level for UNIX-like case
2147 struct _PerlIO base; /* The generic part */
2148 int fd; /* UNIX like file descriptor */
2149 int oflags; /* open/fcntl flags */
2153 PerlIOUnix_oflags(const char *mode)
2156 if (*mode == 'I' || *mode == '#')
2161 if (*++mode == '+') {
2168 oflags = O_CREAT | O_TRUNC;
2169 if (*++mode == '+') {
2178 oflags = O_CREAT | O_APPEND;
2179 if (*++mode == '+') {
2192 else if (*mode == 't') {
2194 oflags &= ~O_BINARY;
2198 * Always open in binary mode
2201 if (*mode || oflags == -1) {
2202 SETERRNO(EINVAL, LIB$_INVARG);
2209 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2211 return PerlIOSelf(f, PerlIOUnix)->fd;
2215 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2217 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2218 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2219 if (*PerlIONext(f)) {
2220 /* We never call down so do any pending stuff now */
2221 PerlIO_flush(PerlIONext(f));
2222 s->fd = PerlIO_fileno(PerlIONext(f));
2224 * XXX could (or should) we retrieve the oflags from the open file
2225 * handle rather than believing the "mode" we are passed in? XXX
2226 * Should the value on NULL mode be 0 or -1?
2228 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2230 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2235 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2236 IV n, const char *mode, int fd, int imode,
2237 int perm, PerlIO *f, int narg, SV **args)
2239 if (PerlIOValid(f)) {
2240 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2241 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2244 char *path = SvPV_nolen(*args);
2248 imode = PerlIOUnix_oflags(mode);
2252 fd = PerlLIO_open3(path, imode, perm);
2260 f = PerlIO_allocate(aTHX);
2262 if (!PerlIOValid(f)) {
2263 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2267 s = PerlIOSelf(f, PerlIOUnix);
2270 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2271 PerlIOUnix_refcnt_inc(fd);
2277 * FIXME: pop layers ???
2285 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2287 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2289 if (flags & PERLIO_DUP_FD) {
2290 fd = PerlLIO_dup(fd);
2292 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2293 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2295 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2296 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2298 PerlIOUnix_refcnt_inc(fd);
2307 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2309 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2310 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2311 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2315 SSize_t len = PerlLIO_read(fd, vbuf, count);
2316 if (len >= 0 || errno != EINTR) {
2318 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2319 else if (len == 0 && count != 0)
2320 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2328 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2330 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2332 SSize_t len = PerlLIO_write(fd, vbuf, count);
2333 if (len >= 0 || errno != EINTR) {
2335 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2343 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2346 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2347 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2348 return (new == (Off_t) - 1) ? -1 : 0;
2352 PerlIOUnix_tell(pTHX_ PerlIO *f)
2354 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2359 PerlIOUnix_close(pTHX_ PerlIO *f)
2361 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2363 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2364 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2365 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2370 SETERRNO(EBADF,SS$_IVCHAN);
2373 while (PerlLIO_close(fd) != 0) {
2374 if (errno != EINTR) {
2381 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2386 PerlIO_funcs PerlIO_unix = {
2387 sizeof(PerlIO_funcs),
2394 PerlIOBase_binmode, /* binmode */
2404 PerlIOBase_noop_ok, /* flush */
2405 PerlIOBase_noop_fail, /* fill */
2408 PerlIOBase_clearerr,
2409 PerlIOBase_setlinebuf,
2410 NULL, /* get_base */
2411 NULL, /* get_bufsiz */
2414 NULL, /* set_ptrcnt */
2417 /*--------------------------------------------------------------------------------------*/
2422 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2423 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2424 broken by the last second glibc 2.3 fix
2426 #define STDIO_BUFFER_WRITABLE
2431 struct _PerlIO base;
2432 FILE *stdio; /* The stream */
2436 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2439 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2440 return PerlSIO_fileno(s);
2447 PerlIOStdio_mode(const char *mode, char *tmode)
2453 #ifdef PERLIO_USING_CRLF
2461 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2464 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2465 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2466 if (toptab == tab) {
2467 /* Top is already stdio - pop self (duplicate) and use original */
2468 PerlIO_pop(aTHX_ f);
2471 int fd = PerlIO_fileno(n);
2474 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2475 mode = PerlIOStdio_mode(mode, tmode)))) {
2476 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2477 /* We never call down so do any pending stuff now */
2478 PerlIO_flush(PerlIONext(f));
2485 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2490 PerlIO_importFILE(FILE *stdio, const char *mode)
2496 if (!mode || !*mode) {
2497 /* We need to probe to see how we can open the stream
2498 so start with read/write and then try write and read
2499 we dup() so that we can fclose without loosing the fd.
2501 Note that the errno value set by a failing fdopen
2502 varies between stdio implementations.
2504 int fd = PerlLIO_dup(fileno(stdio));
2505 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2507 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2510 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2513 /* Don't seem to be able to open */
2519 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2520 s = PerlIOSelf(f, PerlIOStdio);
2528 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2529 IV n, const char *mode, int fd, int imode,
2530 int perm, PerlIO *f, int narg, SV **args)
2533 if (PerlIOValid(f)) {
2534 char *path = SvPV_nolen(*args);
2535 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2537 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2538 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2543 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2548 char *path = SvPV_nolen(*args);
2551 fd = PerlLIO_open3(path, imode, perm);
2554 FILE *stdio = PerlSIO_fopen(path, mode);
2558 f = PerlIO_allocate(aTHX);
2560 if ((f = PerlIO_push(aTHX_ f, self,
2561 (mode = PerlIOStdio_mode(mode, tmode)),
2563 s = PerlIOSelf(f, PerlIOStdio);
2565 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2581 stdio = PerlSIO_stdin;
2584 stdio = PerlSIO_stdout;
2587 stdio = PerlSIO_stderr;
2592 stdio = PerlSIO_fdopen(fd, mode =
2593 PerlIOStdio_mode(mode, tmode));
2598 f = PerlIO_allocate(aTHX);
2600 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2601 s = PerlIOSelf(f, PerlIOStdio);
2603 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2613 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2615 /* This assumes no layers underneath - which is what
2616 happens, but is not how I remember it. NI-S 2001/10/16
2618 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2619 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2620 if (flags & PERLIO_DUP_FD) {
2621 int fd = PerlLIO_dup(fileno(stdio));
2624 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2627 /* FIXME: To avoid messy error recovery if dup fails
2628 re-use the existing stdio as though flag was not set
2632 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2633 PerlIOUnix_refcnt_inc(fileno(stdio));
2639 PerlIOStdio_close(pTHX_ PerlIO *f)
2641 #ifdef SOCKS5_VERSION_NAME
2643 Sock_size_t optlen = sizeof(int);
2645 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2650 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2651 /* Do not close it but do flush any buffers */
2652 return PerlIO_flush(f);
2655 #ifdef SOCKS5_VERSION_NAME
2657 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2659 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2661 PerlSIO_fclose(stdio)
2670 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2672 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2675 STDCHAR *buf = (STDCHAR *) vbuf;
2677 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2678 * stdio does not do that for fread()
2680 int ch = PerlSIO_fgetc(s);
2687 got = PerlSIO_fread(vbuf, 1, count, s);
2692 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2695 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2697 #ifdef STDIO_BUFFER_WRITABLE
2698 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2699 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2700 STDCHAR *base = PerlIO_get_base(f);
2701 SSize_t cnt = PerlIO_get_cnt(f);
2702 STDCHAR *ptr = PerlIO_get_ptr(f);
2703 SSize_t avail = ptr - base;
2705 if (avail > count) {
2709 Move(buf-avail,ptr,avail,STDCHAR);
2712 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2713 if (PerlSIO_feof(s) && unread >= 0)
2714 PerlSIO_clearerr(s);
2719 if (PerlIO_has_cntptr(f)) {
2720 /* We can get pointer to buffer but not its base
2721 Do ungetc() but check chars are ending up in the
2724 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2725 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2727 int ch = *--buf & 0xFF;
2728 if (ungetc(ch,s) != ch) {
2729 /* ungetc did not work */
2732 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2733 /* Did not change pointer as expected */
2734 fgetc(s); /* get char back again */
2744 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2750 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2752 return PerlSIO_fwrite(vbuf, 1, count,
2753 PerlIOSelf(f, PerlIOStdio)->stdio);
2757 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2759 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2760 return PerlSIO_fseek(stdio, offset, whence);
2764 PerlIOStdio_tell(pTHX_ PerlIO *f)
2766 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2767 return PerlSIO_ftell(stdio);
2771 PerlIOStdio_flush(pTHX_ PerlIO *f)
2773 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2774 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2775 return PerlSIO_fflush(stdio);
2780 * FIXME: This discards ungetc() and pre-read stuff which is not
2781 * right if this is just a "sync" from a layer above Suspect right
2782 * design is to do _this_ but not have layer above flush this
2783 * layer read-to-read
2786 * Not writeable - sync by attempting a seek
2789 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2797 PerlIOStdio_eof(pTHX_ PerlIO *f)
2799 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2803 PerlIOStdio_error(pTHX_ PerlIO *f)
2805 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2809 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2811 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2815 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2817 #ifdef HAS_SETLINEBUF
2818 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2820 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2826 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2828 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2829 return (STDCHAR*)PerlSIO_get_base(stdio);
2833 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2835 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2836 return PerlSIO_get_bufsiz(stdio);
2840 #ifdef USE_STDIO_PTR
2842 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2844 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2845 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2849 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2851 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2852 return PerlSIO_get_cnt(stdio);
2856 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2858 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2860 #ifdef STDIO_PTR_LVALUE
2861 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2862 #ifdef STDIO_PTR_LVAL_SETS_CNT
2863 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2864 assert(PerlSIO_get_cnt(stdio) == (cnt));
2867 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2869 * Setting ptr _does_ change cnt - we are done
2873 #else /* STDIO_PTR_LVALUE */
2875 #endif /* STDIO_PTR_LVALUE */
2878 * Now (or only) set cnt
2880 #ifdef STDIO_CNT_LVALUE
2881 PerlSIO_set_cnt(stdio, cnt);
2882 #else /* STDIO_CNT_LVALUE */
2883 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2884 PerlSIO_set_ptr(stdio,
2885 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2887 #else /* STDIO_PTR_LVAL_SETS_CNT */
2889 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2890 #endif /* STDIO_CNT_LVALUE */
2897 PerlIOStdio_fill(pTHX_ PerlIO *f)
2899 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2902 * fflush()ing read-only streams can cause trouble on some stdio-s
2904 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2905 if (PerlSIO_fflush(stdio) != 0)
2908 c = PerlSIO_fgetc(stdio);
2912 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2914 #ifdef STDIO_BUFFER_WRITABLE
2915 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2916 /* Fake ungetc() to the real buffer in case system's ungetc
2919 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2920 SSize_t cnt = PerlSIO_get_cnt(stdio);
2921 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2922 if (ptr == base+1) {
2923 *--ptr = (STDCHAR) c;
2924 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2925 if (PerlSIO_feof(stdio))
2926 PerlSIO_clearerr(stdio);
2932 if (PerlIO_has_cntptr(f)) {
2934 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2941 /* An ungetc()d char is handled separately from the regular
2942 * buffer, so we stuff it in the buffer ourselves.
2943 * Should never get called as should hit code above
2945 *(--((*stdio)->_ptr)) = (unsigned char) c;
2948 /* If buffer snoop scheme above fails fall back to
2951 if (PerlSIO_ungetc(c, stdio) != c)
2959 PerlIO_funcs PerlIO_stdio = {
2960 sizeof(PerlIO_funcs),
2962 sizeof(PerlIOStdio),
2963 PERLIO_K_BUFFERED|PERLIO_K_RAW,
2967 PerlIOBase_binmode, /* binmode */
2981 PerlIOStdio_clearerr,
2982 PerlIOStdio_setlinebuf,
2984 PerlIOStdio_get_base,
2985 PerlIOStdio_get_bufsiz,
2990 #ifdef USE_STDIO_PTR
2991 PerlIOStdio_get_ptr,
2992 PerlIOStdio_get_cnt,
2993 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2994 PerlIOStdio_set_ptrcnt
2995 #else /* STDIO_PTR_LVALUE */
2997 #endif /* STDIO_PTR_LVALUE */
2998 #else /* USE_STDIO_PTR */
3002 #endif /* USE_STDIO_PTR */
3006 PerlIO_exportFILE(PerlIO *f, const char *mode)
3012 if (!mode || !*mode) {
3013 mode = PerlIO_modestr(f,buf);
3015 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3017 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3018 PerlIOStdio *s = PerlIOSelf(f,PerlIOStdio);
3026 PerlIO_findFILE(PerlIO *f)
3030 if (l->tab == &PerlIO_stdio) {
3031 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3034 l = *PerlIONext(&l);
3036 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3037 return PerlIO_exportFILE(f, Nullch);
3041 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3045 if (l->tab == &PerlIO_stdio) {
3046 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3047 if (s->stdio == f) {
3049 PerlIO_pop(aTHX_ p);
3058 /*--------------------------------------------------------------------------------------*/
3060 * perlio buffer layer
3064 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3066 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3067 int fd = PerlIO_fileno(f);
3068 if (fd >= 0 && PerlLIO_isatty(fd)) {
3069 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3071 if (*PerlIONext(f)) {
3072 Off_t posn = PerlIO_tell(PerlIONext(f));
3073 if (posn != (Off_t) - 1) {
3077 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3081 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3082 IV n, const char *mode, int fd, int imode, int perm,
3083 PerlIO *f, int narg, SV **args)
3085 if (PerlIOValid(f)) {
3086 PerlIO *next = PerlIONext(f);
3087 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3088 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3090 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3095 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3103 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3106 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3108 * if push fails during open, open fails. close will pop us.
3113 fd = PerlIO_fileno(f);
3114 if (init && fd == 2) {
3116 * Initial stderr is unbuffered
3118 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3120 #ifdef PERLIO_USING_CRLF
3121 # ifdef PERLIO_IS_BINMODE_FD
3122 if (PERLIO_IS_BINMODE_FD(fd))
3123 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3127 * do something about failing setmode()? --jhi
3129 PerlLIO_setmode(fd, O_BINARY);
3138 * This "flush" is akin to sfio's sync in that it handles files in either
3139 * read or write state
3142 PerlIOBuf_flush(pTHX_ PerlIO *f)
3144 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3146 PerlIO *n = PerlIONext(f);
3147 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3149 * write() the buffer
3151 STDCHAR *buf = b->buf;
3153 while (p < b->ptr) {
3154 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3158 else if (count < 0 || PerlIO_error(n)) {
3159 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3164 b->posn += (p - buf);
3166 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3167 STDCHAR *buf = PerlIO_get_base(f);
3169 * Note position change
3171 b->posn += (b->ptr - buf);
3172 if (b->ptr < b->end) {
3173 /* We did not consume all of it - try and seek downstream to
3174 our logical position
3176 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3177 /* Reload n as some layers may pop themselves on seek */
3178 b->posn = PerlIO_tell(n = PerlIONext(f));
3181 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3182 data is lost for good - so return saying "ok" having undone
3185 b->posn -= (b->ptr - buf);
3190 b->ptr = b->end = b->buf;
3191 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3192 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3193 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3199 PerlIOBuf_fill(pTHX_ PerlIO *f)
3201 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3202 PerlIO *n = PerlIONext(f);
3205 * Down-stream flush is defined not to loose read data so is harmless.
3206 * we would not normally be fill'ing if there was data left in anycase.
3208 if (PerlIO_flush(f) != 0)
3210 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3211 PerlIOBase_flush_linebuf(aTHX);
3214 PerlIO_get_base(f); /* allocate via vtable */
3216 b->ptr = b->end = b->buf;
3218 if (!PerlIOValid(n)) {
3219 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3223 if (PerlIO_fast_gets(n)) {
3225 * Layer below is also buffered. We do _NOT_ want to call its
3226 * ->Read() because that will loop till it gets what we asked for
3227 * which may hang on a pipe etc. Instead take anything it has to
3228 * hand, or ask it to fill _once_.
3230 avail = PerlIO_get_cnt(n);
3232 avail = PerlIO_fill(n);
3234 avail = PerlIO_get_cnt(n);
3236 if (!PerlIO_error(n) && PerlIO_eof(n))
3241 STDCHAR *ptr = PerlIO_get_ptr(n);
3242 SSize_t cnt = avail;
3243 if (avail > (SSize_t)b->bufsiz)
3245 Copy(ptr, b->buf, avail, STDCHAR);
3246 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3250 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3254 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3256 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3259 b->end = b->buf + avail;
3260 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3265 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3267 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3268 if (PerlIOValid(f)) {
3271 return PerlIOBase_read(aTHX_ f, vbuf, count);
3277 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3279 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3280 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3283 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3288 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3290 * Buffer is already a read buffer, we can overwrite any chars
3291 * which have been read back to buffer start
3293 avail = (b->ptr - b->buf);
3297 * Buffer is idle, set it up so whole buffer is available for
3301 b->end = b->buf + avail;
3303 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3305 * Buffer extends _back_ from where we are now
3307 b->posn -= b->bufsiz;
3309 if (avail > (SSize_t) count) {
3311 * If we have space for more than count, just move count
3319 * In simple stdio-like ungetc() case chars will be already
3322 if (buf != b->ptr) {
3323 Copy(buf, b->ptr, avail, STDCHAR);
3327 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3331 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3337 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3339 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3340 const STDCHAR *buf = (const STDCHAR *) vbuf;
3344 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3347 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3348 if ((SSize_t) count < avail)
3350 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3351 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3366 Copy(buf, b->ptr, avail, STDCHAR);
3373 if (b->ptr >= (b->buf + b->bufsiz))
3376 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3382 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3385 if ((code = PerlIO_flush(f)) == 0) {
3386 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3387 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3388 code = PerlIO_seek(PerlIONext(f), offset, whence);
3390 b->posn = PerlIO_tell(PerlIONext(f));
3397 PerlIOBuf_tell(pTHX_ PerlIO *f)
3399 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3401 * b->posn is file position where b->buf was read, or will be written
3403 Off_t posn = b->posn;
3406 * If buffer is valid adjust position by amount in buffer
3408 posn += (b->ptr - b->buf);
3414 PerlIOBuf_popped(pTHX_ PerlIO *f)
3416 IV code = PerlIOBase_popped(aTHX_ f);
3417 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3418 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3422 b->ptr = b->end = b->buf;
3423 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3428 PerlIOBuf_close(pTHX_ PerlIO *f)
3430 IV code = PerlIOBase_close(aTHX_ f);
3431 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3432 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3436 b->ptr = b->end = b->buf;
3437 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3442 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3444 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3451 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3453 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3456 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3457 return (b->end - b->ptr);
3462 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3464 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3469 Newz('B',b->buf,b->bufsiz, STDCHAR);
3471 b->buf = (STDCHAR *) & b->oneword;
3472 b->bufsiz = sizeof(b->oneword);
3481 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3483 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3486 return (b->end - b->buf);
3490 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3492 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3496 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3497 assert(PerlIO_get_cnt(f) == cnt);
3498 assert(b->ptr >= b->buf);
3500 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3504 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3506 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3511 PerlIO_funcs PerlIO_perlio = {
3512 sizeof(PerlIO_funcs),
3515 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3519 PerlIOBase_binmode, /* binmode */
3533 PerlIOBase_clearerr,
3534 PerlIOBase_setlinebuf,
3539 PerlIOBuf_set_ptrcnt,
3542 /*--------------------------------------------------------------------------------------*/
3544 * Temp layer to hold unread chars when cannot do it any other way
3548 PerlIOPending_fill(pTHX_ PerlIO *f)
3551 * Should never happen
3558 PerlIOPending_close(pTHX_ PerlIO *f)
3561 * A tad tricky - flush pops us, then we close new top
3564 return PerlIO_close(f);
3568 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3571 * A tad tricky - flush pops us, then we seek new top
3574 return PerlIO_seek(f, offset, whence);
3579 PerlIOPending_flush(pTHX_ PerlIO *f)
3581 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3582 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3586 PerlIO_pop(aTHX_ f);
3591 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3597 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3602 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3604 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3605 PerlIOl *l = PerlIOBase(f);
3607 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3608 * etc. get muddled when it changes mid-string when we auto-pop.
3610 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3611 (PerlIOBase(PerlIONext(f))->
3612 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3617 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3619 SSize_t avail = PerlIO_get_cnt(f);
3621 if ((SSize_t)count < avail)
3624 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3625 if (got >= 0 && got < (SSize_t)count) {
3627 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3628 if (more >= 0 || got == 0)
3634 PerlIO_funcs PerlIO_pending = {
3635 sizeof(PerlIO_funcs),
3638 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3639 PerlIOPending_pushed,
3642 PerlIOBase_binmode, /* binmode */
3651 PerlIOPending_close,
3652 PerlIOPending_flush,
3656 PerlIOBase_clearerr,
3657 PerlIOBase_setlinebuf,
3662 PerlIOPending_set_ptrcnt,
3667 /*--------------------------------------------------------------------------------------*/
3669 * crlf - translation On read translate CR,LF to "\n" we do this by
3670 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3671 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3675 PerlIOBuf base; /* PerlIOBuf stuff */
3676 STDCHAR *nl; /* Position of crlf we "lied" about in the
3681 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3684 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3685 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3687 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3688 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3689 PerlIOBase(f)->flags);
3696 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3698 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3703 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3704 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3706 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3707 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3709 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3714 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3715 b->end = b->ptr = b->buf + b->bufsiz;
3716 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3717 b->posn -= b->bufsiz;
3719 while (count > 0 && b->ptr > b->buf) {
3722 if (b->ptr - 2 >= b->buf) {
3745 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3747 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3750 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3751 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3752 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3753 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3755 while (nl < b->end && *nl != 0xd)
3757 if (nl < b->end && *nl == 0xd) {
3759 if (nl + 1 < b->end) {
3766 * Not CR,LF but just CR
3774 * Blast - found CR as last char in buffer
3779 * They may not care, defer work as long as
3783 return (nl - b->ptr);
3787 b->ptr++; /* say we have read it as far as
3788 * flush() is concerned */
3789 b->buf++; /* Leave space in front of buffer */
3790 b->bufsiz--; /* Buffer is thus smaller */
3791 code = PerlIO_fill(f); /* Fetch some more */
3792 b->bufsiz++; /* Restore size for next time */
3793 b->buf--; /* Point at space */
3794 b->ptr = nl = b->buf; /* Which is what we hand
3796 b->posn--; /* Buffer starts here */
3797 *nl = 0xd; /* Fill in the CR */
3799 goto test; /* fill() call worked */
3801 * CR at EOF - just fall through
3803 /* Should we clear EOF though ??? */
3808 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3814 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3816 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3817 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3823 if (ptr == b->end && *c->nl == 0xd) {
3824 /* Defered CR at end of buffer case - we lied about count */
3836 * Test code - delete when it works ...
3838 IV flags = PerlIOBase(f)->flags;
3839 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3840 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3841 /* Defered CR at end of buffer case - we lied about count */
3847 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3848 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3856 * They have taken what we lied about
3864 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3868 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3870 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3871 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3873 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3874 const STDCHAR *buf = (const STDCHAR *) vbuf;
3875 const STDCHAR *ebuf = buf + count;
3878 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3880 while (buf < ebuf) {
3881 STDCHAR *eptr = b->buf + b->bufsiz;
3882 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3883 while (buf < ebuf && b->ptr < eptr) {
3885 if ((b->ptr + 2) > eptr) {
3893 *(b->ptr)++ = 0xd; /* CR */
3894 *(b->ptr)++ = 0xa; /* LF */
3896 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3906 if (b->ptr >= eptr) {
3912 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3914 return (buf - (STDCHAR *) vbuf);
3919 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3921 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3926 return PerlIOBuf_flush(aTHX_ f);
3930 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
3932 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
3933 /* In text mode - flush any pending stuff and flip it */
3934 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
3935 #ifndef PERLIO_USING_CRLF
3936 /* CRLF is unusual case - if this is just the :crlf layer pop it */
3937 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
3938 PerlIO_pop(aTHX_ f);
3945 PerlIO_funcs PerlIO_crlf = {
3946 sizeof(PerlIO_funcs),
3949 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
3951 PerlIOBuf_popped, /* popped */
3953 PerlIOCrlf_binmode, /* binmode */
3957 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3959 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3960 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3968 PerlIOBase_clearerr,
3969 PerlIOBase_setlinebuf,
3974 PerlIOCrlf_set_ptrcnt,
3978 /*--------------------------------------------------------------------------------------*/
3980 * mmap as "buffer" layer
3984 PerlIOBuf base; /* PerlIOBuf stuff */
3985 Mmap_t mptr; /* Mapped address */
3986 Size_t len; /* mapped length */
3987 STDCHAR *bbuf; /* malloced buffer if map fails */
3990 static size_t page_size = 0;
3993 PerlIOMmap_map(pTHX_ PerlIO *f)
3995 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3996 IV flags = PerlIOBase(f)->flags;
4000 if (flags & PERLIO_F_CANREAD) {
4001 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4002 int fd = PerlIO_fileno(f);
4004 code = Fstat(fd, &st);
4005 if (code == 0 && S_ISREG(st.st_mode)) {
4006 SSize_t len = st.st_size - b->posn;
4010 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4012 SETERRNO(0, SS$_NORMAL);
4013 # ifdef _SC_PAGESIZE
4014 page_size = sysconf(_SC_PAGESIZE);
4016 page_size = sysconf(_SC_PAGE_SIZE);
4018 if ((long) page_size < 0) {
4023 (void) SvUPGRADE(error, SVt_PV);
4024 msg = SvPVx(error, n_a);
4025 Perl_croak(aTHX_ "panic: sysconf: %s",
4030 "panic: sysconf: pagesize unknown");
4034 # ifdef HAS_GETPAGESIZE
4035 page_size = getpagesize();
4037 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4038 page_size = PAGESIZE; /* compiletime, bad */
4042 if ((IV) page_size <= 0)
4043 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4048 * This is a hack - should never happen - open should
4051 b->posn = PerlIO_tell(PerlIONext(f));
4053 posn = (b->posn / page_size) * page_size;
4054 len = st.st_size - posn;
4055 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4056 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4057 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4058 madvise(m->mptr, len, MADV_SEQUENTIAL);
4060 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4061 madvise(m->mptr, len, MADV_WILLNEED);
4063 PerlIOBase(f)->flags =
4064 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4065 b->end = ((STDCHAR *) m->mptr) + len;
4066 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4075 PerlIOBase(f)->flags =
4076 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4078 b->ptr = b->end = b->ptr;
4087 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4089 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4090 PerlIOBuf *b = &m->base;
4094 code = munmap(m->mptr, m->len);
4098 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4101 b->ptr = b->end = b->buf;
4102 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4108 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4110 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4111 PerlIOBuf *b = &m->base;
4112 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4114 * Already have a readbuffer in progress
4120 * We have a write buffer or flushed PerlIOBuf read buffer
4122 m->bbuf = b->buf; /* save it in case we need it again */
4123 b->buf = NULL; /* Clear to trigger below */
4126 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4129 * Map did not work - recover PerlIOBuf buffer if we have one
4134 b->ptr = b->end = b->buf;
4137 return PerlIOBuf_get_base(aTHX_ f);
4141 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4143 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4144 PerlIOBuf *b = &m->base;
4145 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4147 if (b->ptr && (b->ptr - count) >= b->buf
4148 && memEQ(b->ptr - count, vbuf, count)) {
4150 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4155 * Loose the unwritable mapped buffer
4159 * If flush took the "buffer" see if we have one from before
4161 if (!b->buf && m->bbuf)
4164 PerlIOBuf_get_base(aTHX_ f);
4168 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4172 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4174 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4175 PerlIOBuf *b = &m->base;
4176 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4178 * No, or wrong sort of, buffer
4181 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4185 * If unmap took the "buffer" see if we have one from before
4187 if (!b->buf && m->bbuf)
4190 PerlIOBuf_get_base(aTHX_ f);
4194 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4198 PerlIOMmap_flush(pTHX_ PerlIO *f)
4200 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4201 PerlIOBuf *b = &m->base;
4202 IV code = PerlIOBuf_flush(aTHX_ f);
4204 * Now we are "synced" at PerlIOBuf level
4211 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4216 * We seem to have a PerlIOBuf buffer which was not mapped
4217 * remember it in case we need one later
4226 PerlIOMmap_fill(pTHX_ PerlIO *f)
4228 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4229 IV code = PerlIO_flush(f);
4230 if (code == 0 && !b->buf) {
4231 code = PerlIOMmap_map(aTHX_ f);
4233 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4234 code = PerlIOBuf_fill(aTHX_ f);
4240 PerlIOMmap_close(pTHX_ PerlIO *f)
4242 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4243 PerlIOBuf *b = &m->base;
4244 IV code = PerlIO_flush(f);
4248 b->ptr = b->end = b->buf;
4250 if (PerlIOBuf_close(aTHX_ f) != 0)
4256 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4258 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4262 PerlIO_funcs PerlIO_mmap = {
4263 sizeof(PerlIO_funcs),
4266 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4270 PerlIOBase_binmode, /* binmode */
4284 PerlIOBase_clearerr,
4285 PerlIOBase_setlinebuf,
4286 PerlIOMmap_get_base,
4290 PerlIOBuf_set_ptrcnt,
4293 #endif /* HAS_MMAP */
4296 Perl_PerlIO_stdin(pTHX)
4299 PerlIO_stdstreams(aTHX);
4301 return &PL_perlio[1];
4305 Perl_PerlIO_stdout(pTHX)
4308 PerlIO_stdstreams(aTHX);
4310 return &PL_perlio[2];
4314 Perl_PerlIO_stderr(pTHX)
4317 PerlIO_stdstreams(aTHX);
4319 return &PL_perlio[3];
4322 /*--------------------------------------------------------------------------------------*/
4325 PerlIO_getname(PerlIO *f, char *buf)
4330 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4332 name = fgetname(stdio, buf);
4334 Perl_croak(aTHX_ "Don't know how to get file name");
4340 /*--------------------------------------------------------------------------------------*/
4342 * Functions which can be called on any kind of PerlIO implemented in
4346 #undef PerlIO_fdopen
4348 PerlIO_fdopen(int fd, const char *mode)
4351 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4356 PerlIO_open(const char *path, const char *mode)
4359 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4360 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4363 #undef Perlio_reopen
4365 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4368 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4369 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4374 PerlIO_getc(PerlIO *f)
4378 SSize_t count = PerlIO_read(f, buf, 1);
4380 return (unsigned char) buf[0];
4385 #undef PerlIO_ungetc
4387 PerlIO_ungetc(PerlIO *f, int ch)
4392 if (PerlIO_unread(f, &buf, 1) == 1)
4400 PerlIO_putc(PerlIO *f, int ch)
4404 return PerlIO_write(f, &buf, 1);
4409 PerlIO_puts(PerlIO *f, const char *s)
4412 STRLEN len = strlen(s);
4413 return PerlIO_write(f, s, len);
4416 #undef PerlIO_rewind
4418 PerlIO_rewind(PerlIO *f)
4421 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4425 #undef PerlIO_vprintf
4427 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4430 SV *sv = newSVpvn("", 0);
4436 Perl_va_copy(ap, apc);
4437 sv_vcatpvf(sv, fmt, &apc);
4439 sv_vcatpvf(sv, fmt, &ap);
4442 wrote = PerlIO_write(f, s, len);
4447 #undef PerlIO_printf
4449 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4454 result = PerlIO_vprintf(f, fmt, ap);
4459 #undef PerlIO_stdoutf
4461 PerlIO_stdoutf(const char *fmt, ...)
4467 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4472 #undef PerlIO_tmpfile
4474 PerlIO_tmpfile(void)
4477 * I have no idea how portable mkstemp() is ...
4479 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4482 FILE *stdio = PerlSIO_tmpfile();
4484 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4485 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4492 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4493 int fd = mkstemp(SvPVX(sv));
4496 f = PerlIO_fdopen(fd, "w+");
4498 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4500 PerlLIO_unlink(SvPVX(sv));
4510 #endif /* USE_SFIO */
4511 #endif /* PERLIO_IS_STDIO */
4513 /*======================================================================================*/
4515 * Now some functions in terms of above which may be needed even if we are
4516 * not in true PerlIO mode
4520 #undef PerlIO_setpos
4522 PerlIO_setpos(PerlIO *f, SV *pos)
4527 Off_t *posn = (Off_t *) SvPV(pos, len);
4528 if (f && len == sizeof(Off_t))
4529 return PerlIO_seek(f, *posn, SEEK_SET);
4531 SETERRNO(EINVAL, SS$_IVCHAN);
4535 #undef PerlIO_setpos
4537 PerlIO_setpos(PerlIO *f, SV *pos)
4542 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4543 if (f && len == sizeof(Fpos_t)) {
4544 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4545 return fsetpos64(f, fpos);
4547 return fsetpos(f, fpos);
4551 SETERRNO(EINVAL, SS$_IVCHAN);
4557 #undef PerlIO_getpos
4559 PerlIO_getpos(PerlIO *f, SV *pos)
4562 Off_t posn = PerlIO_tell(f);
4563 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4564 return (posn == (Off_t) - 1) ? -1 : 0;
4567 #undef PerlIO_getpos
4569 PerlIO_getpos(PerlIO *f, SV *pos)
4574 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4575 code = fgetpos64(f, &fpos);
4577 code = fgetpos(f, &fpos);
4579 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4584 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4587 vprintf(char *pat, char *args)
4589 _doprnt(pat, args, stdout);
4590 return 0; /* wrong, but perl doesn't use the return
4595 vfprintf(FILE *fd, char *pat, char *args)
4597 _doprnt(pat, args, fd);
4598 return 0; /* wrong, but perl doesn't use the return
4604 #ifndef PerlIO_vsprintf
4606 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4608 int val = vsprintf(s, fmt, ap);
4610 if (strlen(s) >= (STRLEN) n) {
4612 (void) PerlIO_puts(Perl_error_log,
4613 "panic: sprintf overflow - memory corrupted!\n");
4621 #ifndef PerlIO_sprintf
4623 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4628 result = PerlIO_vsprintf(s, n, fmt, ap);