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));
2584 stdio = PerlSIO_stdin;
2587 stdio = PerlSIO_stdout;
2590 stdio = PerlSIO_stderr;
2595 stdio = PerlSIO_fdopen(fd, mode =
2596 PerlIOStdio_mode(mode, tmode));
2601 f = PerlIO_allocate(aTHX);
2603 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2604 s = PerlIOSelf(f, PerlIOStdio);
2606 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2616 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2618 /* This assumes no layers underneath - which is what
2619 happens, but is not how I remember it. NI-S 2001/10/16
2621 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2622 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2623 if (flags & PERLIO_DUP_FD) {
2624 int fd = PerlLIO_dup(fileno(stdio));
2627 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2630 /* FIXME: To avoid messy error recovery if dup fails
2631 re-use the existing stdio as though flag was not set
2635 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2636 PerlIOUnix_refcnt_inc(fileno(stdio));
2642 PerlIOStdio_close(pTHX_ PerlIO *f)
2644 #ifdef SOCKS5_VERSION_NAME
2646 Sock_size_t optlen = sizeof(int);
2648 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2653 if (PerlIOUnix_refcnt_dec(fileno(stdio)) > 0) {
2654 /* Do not close it but do flush any buffers */
2655 return PerlIO_flush(f);
2658 #ifdef SOCKS5_VERSION_NAME
2660 (PerlIO_fileno(f), SOL_SOCKET, SO_TYPE, (void *) &optval,
2662 0) ? PerlSIO_fclose(stdio) : close(PerlIO_fileno(f))
2664 PerlSIO_fclose(stdio)
2673 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2675 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2678 STDCHAR *buf = (STDCHAR *) vbuf;
2680 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2681 * stdio does not do that for fread()
2683 int ch = PerlSIO_fgetc(s);
2690 got = PerlSIO_fread(vbuf, 1, count, s);
2695 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2698 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2700 #ifdef STDIO_BUFFER_WRITABLE
2701 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2702 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2703 STDCHAR *base = PerlIO_get_base(f);
2704 SSize_t cnt = PerlIO_get_cnt(f);
2705 STDCHAR *ptr = PerlIO_get_ptr(f);
2706 SSize_t avail = ptr - base;
2708 if (avail > count) {
2712 Move(buf-avail,ptr,avail,STDCHAR);
2715 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2716 if (PerlSIO_feof(s) && unread >= 0)
2717 PerlSIO_clearerr(s);
2722 if (PerlIO_has_cntptr(f)) {
2723 /* We can get pointer to buffer but not its base
2724 Do ungetc() but check chars are ending up in the
2727 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2728 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2730 int ch = *--buf & 0xFF;
2731 if (ungetc(ch,s) != ch) {
2732 /* ungetc did not work */
2735 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2736 /* Did not change pointer as expected */
2737 fgetc(s); /* get char back again */
2747 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2753 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2755 return PerlSIO_fwrite(vbuf, 1, count,
2756 PerlIOSelf(f, PerlIOStdio)->stdio);
2760 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2762 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2763 return PerlSIO_fseek(stdio, offset, whence);
2767 PerlIOStdio_tell(pTHX_ PerlIO *f)
2769 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2770 return PerlSIO_ftell(stdio);
2774 PerlIOStdio_flush(pTHX_ PerlIO *f)
2776 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2777 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
2778 return PerlSIO_fflush(stdio);
2783 * FIXME: This discards ungetc() and pre-read stuff which is not
2784 * right if this is just a "sync" from a layer above Suspect right
2785 * design is to do _this_ but not have layer above flush this
2786 * layer read-to-read
2789 * Not writeable - sync by attempting a seek
2792 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
2800 PerlIOStdio_eof(pTHX_ PerlIO *f)
2802 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
2806 PerlIOStdio_error(pTHX_ PerlIO *f)
2808 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
2812 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
2814 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
2818 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
2820 #ifdef HAS_SETLINEBUF
2821 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
2823 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
2829 PerlIOStdio_get_base(pTHX_ PerlIO *f)
2831 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2832 return (STDCHAR*)PerlSIO_get_base(stdio);
2836 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
2838 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2839 return PerlSIO_get_bufsiz(stdio);
2843 #ifdef USE_STDIO_PTR
2845 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
2847 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2848 return (STDCHAR*)PerlSIO_get_ptr(stdio);
2852 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
2854 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2855 return PerlSIO_get_cnt(stdio);
2859 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
2861 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2863 #ifdef STDIO_PTR_LVALUE
2864 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
2865 #ifdef STDIO_PTR_LVAL_SETS_CNT
2866 if (PerlSIO_get_cnt(stdio) != (cnt)) {
2867 assert(PerlSIO_get_cnt(stdio) == (cnt));
2870 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
2872 * Setting ptr _does_ change cnt - we are done
2876 #else /* STDIO_PTR_LVALUE */
2878 #endif /* STDIO_PTR_LVALUE */
2881 * Now (or only) set cnt
2883 #ifdef STDIO_CNT_LVALUE
2884 PerlSIO_set_cnt(stdio, cnt);
2885 #else /* STDIO_CNT_LVALUE */
2886 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
2887 PerlSIO_set_ptr(stdio,
2888 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
2890 #else /* STDIO_PTR_LVAL_SETS_CNT */
2892 #endif /* STDIO_PTR_LVAL_SETS_CNT */
2893 #endif /* STDIO_CNT_LVALUE */
2900 PerlIOStdio_fill(pTHX_ PerlIO *f)
2902 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2905 * fflush()ing read-only streams can cause trouble on some stdio-s
2907 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
2908 if (PerlSIO_fflush(stdio) != 0)
2911 c = PerlSIO_fgetc(stdio);
2915 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2917 #ifdef STDIO_BUFFER_WRITABLE
2918 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2919 /* Fake ungetc() to the real buffer in case system's ungetc
2922 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
2923 SSize_t cnt = PerlSIO_get_cnt(stdio);
2924 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
2925 if (ptr == base+1) {
2926 *--ptr = (STDCHAR) c;
2927 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
2928 if (PerlSIO_feof(stdio))
2929 PerlSIO_clearerr(stdio);
2935 if (PerlIO_has_cntptr(f)) {
2937 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
2944 /* An ungetc()d char is handled separately from the regular
2945 * buffer, so we stuff it in the buffer ourselves.
2946 * Should never get called as should hit code above
2948 *(--((*stdio)->_ptr)) = (unsigned char) c;
2951 /* If buffer snoop scheme above fails fall back to
2954 if (PerlSIO_ungetc(c, stdio) != c)
2962 PerlIO_funcs PerlIO_stdio = {
2963 sizeof(PerlIO_funcs),
2965 sizeof(PerlIOStdio),
2966 PERLIO_K_BUFFERED|PERLIO_K_RAW,
2970 PerlIOBase_binmode, /* binmode */
2984 PerlIOStdio_clearerr,
2985 PerlIOStdio_setlinebuf,
2987 PerlIOStdio_get_base,
2988 PerlIOStdio_get_bufsiz,
2993 #ifdef USE_STDIO_PTR
2994 PerlIOStdio_get_ptr,
2995 PerlIOStdio_get_cnt,
2996 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
2997 PerlIOStdio_set_ptrcnt
2998 #else /* STDIO_PTR_LVALUE */
3000 #endif /* STDIO_PTR_LVALUE */
3001 #else /* USE_STDIO_PTR */
3005 #endif /* USE_STDIO_PTR */
3009 PerlIO_exportFILE(PerlIO *f, const char *mode)
3015 if (!mode || !*mode) {
3016 mode = PerlIO_modestr(f,buf);
3018 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3020 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3021 PerlIOStdio *s = PerlIOSelf(f,PerlIOStdio);
3029 PerlIO_findFILE(PerlIO *f)
3033 if (l->tab == &PerlIO_stdio) {
3034 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3037 l = *PerlIONext(&l);
3039 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3040 return PerlIO_exportFILE(f, Nullch);
3044 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3048 if (l->tab == &PerlIO_stdio) {
3049 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3050 if (s->stdio == f) {
3052 PerlIO_pop(aTHX_ p);
3061 /*--------------------------------------------------------------------------------------*/
3063 * perlio buffer layer
3067 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3069 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3070 int fd = PerlIO_fileno(f);
3071 if (fd >= 0 && PerlLIO_isatty(fd)) {
3072 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3074 if (*PerlIONext(f)) {
3075 Off_t posn = PerlIO_tell(PerlIONext(f));
3076 if (posn != (Off_t) - 1) {
3080 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3084 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3085 IV n, const char *mode, int fd, int imode, int perm,
3086 PerlIO *f, int narg, SV **args)
3088 if (PerlIOValid(f)) {
3089 PerlIO *next = PerlIONext(f);
3090 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3091 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3093 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3098 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3106 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3109 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3111 * if push fails during open, open fails. close will pop us.
3116 fd = PerlIO_fileno(f);
3117 if (init && fd == 2) {
3119 * Initial stderr is unbuffered
3121 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3123 #ifdef PERLIO_USING_CRLF
3124 # ifdef PERLIO_IS_BINMODE_FD
3125 if (PERLIO_IS_BINMODE_FD(fd))
3126 PerlIO_binmode(f, '<'/*not used*/, O_BINARY, Nullch);
3130 * do something about failing setmode()? --jhi
3132 PerlLIO_setmode(fd, O_BINARY);
3141 * This "flush" is akin to sfio's sync in that it handles files in either
3142 * read or write state
3145 PerlIOBuf_flush(pTHX_ PerlIO *f)
3147 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3149 PerlIO *n = PerlIONext(f);
3150 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3152 * write() the buffer
3154 STDCHAR *buf = b->buf;
3156 while (p < b->ptr) {
3157 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3161 else if (count < 0 || PerlIO_error(n)) {
3162 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3167 b->posn += (p - buf);
3169 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3170 STDCHAR *buf = PerlIO_get_base(f);
3172 * Note position change
3174 b->posn += (b->ptr - buf);
3175 if (b->ptr < b->end) {
3176 /* We did not consume all of it - try and seek downstream to
3177 our logical position
3179 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3180 /* Reload n as some layers may pop themselves on seek */
3181 b->posn = PerlIO_tell(n = PerlIONext(f));
3184 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3185 data is lost for good - so return saying "ok" having undone
3188 b->posn -= (b->ptr - buf);
3193 b->ptr = b->end = b->buf;
3194 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3195 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3196 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3202 PerlIOBuf_fill(pTHX_ PerlIO *f)
3204 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3205 PerlIO *n = PerlIONext(f);
3208 * Down-stream flush is defined not to loose read data so is harmless.
3209 * we would not normally be fill'ing if there was data left in anycase.
3211 if (PerlIO_flush(f) != 0)
3213 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3214 PerlIOBase_flush_linebuf(aTHX);
3217 PerlIO_get_base(f); /* allocate via vtable */
3219 b->ptr = b->end = b->buf;
3221 if (!PerlIOValid(n)) {
3222 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3226 if (PerlIO_fast_gets(n)) {
3228 * Layer below is also buffered. We do _NOT_ want to call its
3229 * ->Read() because that will loop till it gets what we asked for
3230 * which may hang on a pipe etc. Instead take anything it has to
3231 * hand, or ask it to fill _once_.
3233 avail = PerlIO_get_cnt(n);
3235 avail = PerlIO_fill(n);
3237 avail = PerlIO_get_cnt(n);
3239 if (!PerlIO_error(n) && PerlIO_eof(n))
3244 STDCHAR *ptr = PerlIO_get_ptr(n);
3245 SSize_t cnt = avail;
3246 if (avail > (SSize_t)b->bufsiz)
3248 Copy(ptr, b->buf, avail, STDCHAR);
3249 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3253 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3257 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3259 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3262 b->end = b->buf + avail;
3263 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3268 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3270 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3271 if (PerlIOValid(f)) {
3274 return PerlIOBase_read(aTHX_ f, vbuf, count);
3280 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3282 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3283 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3286 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3291 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3293 * Buffer is already a read buffer, we can overwrite any chars
3294 * which have been read back to buffer start
3296 avail = (b->ptr - b->buf);
3300 * Buffer is idle, set it up so whole buffer is available for
3304 b->end = b->buf + avail;
3306 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3308 * Buffer extends _back_ from where we are now
3310 b->posn -= b->bufsiz;
3312 if (avail > (SSize_t) count) {
3314 * If we have space for more than count, just move count
3322 * In simple stdio-like ungetc() case chars will be already
3325 if (buf != b->ptr) {
3326 Copy(buf, b->ptr, avail, STDCHAR);
3330 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3334 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3340 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3342 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3343 const STDCHAR *buf = (const STDCHAR *) vbuf;
3347 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3350 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3351 if ((SSize_t) count < avail)
3353 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3354 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3369 Copy(buf, b->ptr, avail, STDCHAR);
3376 if (b->ptr >= (b->buf + b->bufsiz))
3379 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3385 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3388 if ((code = PerlIO_flush(f)) == 0) {
3389 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3390 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3391 code = PerlIO_seek(PerlIONext(f), offset, whence);
3393 b->posn = PerlIO_tell(PerlIONext(f));
3400 PerlIOBuf_tell(pTHX_ PerlIO *f)
3402 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3404 * b->posn is file position where b->buf was read, or will be written
3406 Off_t posn = b->posn;
3409 * If buffer is valid adjust position by amount in buffer
3411 posn += (b->ptr - b->buf);
3417 PerlIOBuf_popped(pTHX_ PerlIO *f)
3419 IV code = PerlIOBase_popped(aTHX_ f);
3420 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3421 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3425 b->ptr = b->end = b->buf;
3426 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3431 PerlIOBuf_close(pTHX_ PerlIO *f)
3433 IV code = PerlIOBase_close(aTHX_ f);
3434 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3435 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3439 b->ptr = b->end = b->buf;
3440 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3445 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3447 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3454 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3456 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3459 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3460 return (b->end - b->ptr);
3465 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3467 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3472 Newz('B',b->buf,b->bufsiz, STDCHAR);
3474 b->buf = (STDCHAR *) & b->oneword;
3475 b->bufsiz = sizeof(b->oneword);
3484 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3486 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3489 return (b->end - b->buf);
3493 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3495 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3499 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3500 assert(PerlIO_get_cnt(f) == cnt);
3501 assert(b->ptr >= b->buf);
3503 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3507 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3509 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3514 PerlIO_funcs PerlIO_perlio = {
3515 sizeof(PerlIO_funcs),
3518 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3522 PerlIOBase_binmode, /* binmode */
3536 PerlIOBase_clearerr,
3537 PerlIOBase_setlinebuf,
3542 PerlIOBuf_set_ptrcnt,
3545 /*--------------------------------------------------------------------------------------*/
3547 * Temp layer to hold unread chars when cannot do it any other way
3551 PerlIOPending_fill(pTHX_ PerlIO *f)
3554 * Should never happen
3561 PerlIOPending_close(pTHX_ PerlIO *f)
3564 * A tad tricky - flush pops us, then we close new top
3567 return PerlIO_close(f);
3571 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3574 * A tad tricky - flush pops us, then we seek new top
3577 return PerlIO_seek(f, offset, whence);
3582 PerlIOPending_flush(pTHX_ PerlIO *f)
3584 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3585 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3589 PerlIO_pop(aTHX_ f);
3594 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3600 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3605 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3607 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3608 PerlIOl *l = PerlIOBase(f);
3610 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3611 * etc. get muddled when it changes mid-string when we auto-pop.
3613 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3614 (PerlIOBase(PerlIONext(f))->
3615 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3620 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3622 SSize_t avail = PerlIO_get_cnt(f);
3624 if ((SSize_t)count < avail)
3627 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3628 if (got >= 0 && got < (SSize_t)count) {
3630 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3631 if (more >= 0 || got == 0)
3637 PerlIO_funcs PerlIO_pending = {
3638 sizeof(PerlIO_funcs),
3641 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3642 PerlIOPending_pushed,
3645 PerlIOBase_binmode, /* binmode */
3654 PerlIOPending_close,
3655 PerlIOPending_flush,
3659 PerlIOBase_clearerr,
3660 PerlIOBase_setlinebuf,
3665 PerlIOPending_set_ptrcnt,
3670 /*--------------------------------------------------------------------------------------*/
3672 * crlf - translation On read translate CR,LF to "\n" we do this by
3673 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3674 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3678 PerlIOBuf base; /* PerlIOBuf stuff */
3679 STDCHAR *nl; /* Position of crlf we "lied" about in the
3684 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3687 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3688 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3690 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3691 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3692 PerlIOBase(f)->flags);
3699 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3701 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3706 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3707 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3709 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3710 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3712 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3717 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3718 b->end = b->ptr = b->buf + b->bufsiz;
3719 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3720 b->posn -= b->bufsiz;
3722 while (count > 0 && b->ptr > b->buf) {
3725 if (b->ptr - 2 >= b->buf) {
3748 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
3750 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3753 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3754 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3755 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
3756 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
3758 while (nl < b->end && *nl != 0xd)
3760 if (nl < b->end && *nl == 0xd) {
3762 if (nl + 1 < b->end) {
3769 * Not CR,LF but just CR
3777 * Blast - found CR as last char in buffer
3782 * They may not care, defer work as long as
3786 return (nl - b->ptr);
3790 b->ptr++; /* say we have read it as far as
3791 * flush() is concerned */
3792 b->buf++; /* Leave space in front of buffer */
3793 b->bufsiz--; /* Buffer is thus smaller */
3794 code = PerlIO_fill(f); /* Fetch some more */
3795 b->bufsiz++; /* Restore size for next time */
3796 b->buf--; /* Point at space */
3797 b->ptr = nl = b->buf; /* Which is what we hand
3799 b->posn--; /* Buffer starts here */
3800 *nl = 0xd; /* Fill in the CR */
3802 goto test; /* fill() call worked */
3804 * CR at EOF - just fall through
3806 /* Should we clear EOF though ??? */
3811 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
3817 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3819 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3820 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3826 if (ptr == b->end && *c->nl == 0xd) {
3827 /* Defered CR at end of buffer case - we lied about count */
3839 * Test code - delete when it works ...
3841 IV flags = PerlIOBase(f)->flags;
3842 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
3843 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
3844 /* Defered CR at end of buffer case - we lied about count */
3850 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
3851 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
3859 * They have taken what we lied about
3867 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3871 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3873 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3874 return PerlIOBuf_write(aTHX_ f, vbuf, count);
3876 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3877 const STDCHAR *buf = (const STDCHAR *) vbuf;
3878 const STDCHAR *ebuf = buf + count;
3881 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3883 while (buf < ebuf) {
3884 STDCHAR *eptr = b->buf + b->bufsiz;
3885 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3886 while (buf < ebuf && b->ptr < eptr) {
3888 if ((b->ptr + 2) > eptr) {
3896 *(b->ptr)++ = 0xd; /* CR */
3897 *(b->ptr)++ = 0xa; /* LF */
3899 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3909 if (b->ptr >= eptr) {
3915 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3917 return (buf - (STDCHAR *) vbuf);
3922 PerlIOCrlf_flush(pTHX_ PerlIO *f)
3924 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3929 return PerlIOBuf_flush(aTHX_ f);
3933 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
3935 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
3936 /* In text mode - flush any pending stuff and flip it */
3937 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
3938 #ifndef PERLIO_USING_CRLF
3939 /* CRLF is unusual case - if this is just the :crlf layer pop it */
3940 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
3941 PerlIO_pop(aTHX_ f);
3948 PerlIO_funcs PerlIO_crlf = {
3949 sizeof(PerlIO_funcs),
3952 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
3954 PerlIOBuf_popped, /* popped */
3956 PerlIOCrlf_binmode, /* binmode */
3960 PerlIOBuf_read, /* generic read works with ptr/cnt lies
3962 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
3963 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
3971 PerlIOBase_clearerr,
3972 PerlIOBase_setlinebuf,
3977 PerlIOCrlf_set_ptrcnt,
3981 /*--------------------------------------------------------------------------------------*/
3983 * mmap as "buffer" layer
3987 PerlIOBuf base; /* PerlIOBuf stuff */
3988 Mmap_t mptr; /* Mapped address */
3989 Size_t len; /* mapped length */
3990 STDCHAR *bbuf; /* malloced buffer if map fails */
3993 static size_t page_size = 0;
3996 PerlIOMmap_map(pTHX_ PerlIO *f)
3998 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
3999 IV flags = PerlIOBase(f)->flags;
4003 if (flags & PERLIO_F_CANREAD) {
4004 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4005 int fd = PerlIO_fileno(f);
4007 code = Fstat(fd, &st);
4008 if (code == 0 && S_ISREG(st.st_mode)) {
4009 SSize_t len = st.st_size - b->posn;
4013 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4015 SETERRNO(0, SS$_NORMAL);
4016 # ifdef _SC_PAGESIZE
4017 page_size = sysconf(_SC_PAGESIZE);
4019 page_size = sysconf(_SC_PAGE_SIZE);
4021 if ((long) page_size < 0) {
4026 (void) SvUPGRADE(error, SVt_PV);
4027 msg = SvPVx(error, n_a);
4028 Perl_croak(aTHX_ "panic: sysconf: %s",
4033 "panic: sysconf: pagesize unknown");
4037 # ifdef HAS_GETPAGESIZE
4038 page_size = getpagesize();
4040 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4041 page_size = PAGESIZE; /* compiletime, bad */
4045 if ((IV) page_size <= 0)
4046 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4051 * This is a hack - should never happen - open should
4054 b->posn = PerlIO_tell(PerlIONext(f));
4056 posn = (b->posn / page_size) * page_size;
4057 len = st.st_size - posn;
4058 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4059 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4060 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4061 madvise(m->mptr, len, MADV_SEQUENTIAL);
4063 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4064 madvise(m->mptr, len, MADV_WILLNEED);
4066 PerlIOBase(f)->flags =
4067 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4068 b->end = ((STDCHAR *) m->mptr) + len;
4069 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4078 PerlIOBase(f)->flags =
4079 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4081 b->ptr = b->end = b->ptr;
4090 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4092 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4093 PerlIOBuf *b = &m->base;
4097 code = munmap(m->mptr, m->len);
4101 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4104 b->ptr = b->end = b->buf;
4105 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4111 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4113 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4114 PerlIOBuf *b = &m->base;
4115 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4117 * Already have a readbuffer in progress
4123 * We have a write buffer or flushed PerlIOBuf read buffer
4125 m->bbuf = b->buf; /* save it in case we need it again */
4126 b->buf = NULL; /* Clear to trigger below */
4129 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4132 * Map did not work - recover PerlIOBuf buffer if we have one
4137 b->ptr = b->end = b->buf;
4140 return PerlIOBuf_get_base(aTHX_ f);
4144 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4146 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4147 PerlIOBuf *b = &m->base;
4148 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4150 if (b->ptr && (b->ptr - count) >= b->buf
4151 && memEQ(b->ptr - count, vbuf, count)) {
4153 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4158 * Loose the unwritable mapped buffer
4162 * If flush took the "buffer" see if we have one from before
4164 if (!b->buf && m->bbuf)
4167 PerlIOBuf_get_base(aTHX_ f);
4171 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4175 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4177 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4178 PerlIOBuf *b = &m->base;
4179 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4181 * No, or wrong sort of, buffer
4184 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4188 * If unmap took the "buffer" see if we have one from before
4190 if (!b->buf && m->bbuf)
4193 PerlIOBuf_get_base(aTHX_ f);
4197 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4201 PerlIOMmap_flush(pTHX_ PerlIO *f)
4203 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4204 PerlIOBuf *b = &m->base;
4205 IV code = PerlIOBuf_flush(aTHX_ f);
4207 * Now we are "synced" at PerlIOBuf level
4214 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4219 * We seem to have a PerlIOBuf buffer which was not mapped
4220 * remember it in case we need one later
4229 PerlIOMmap_fill(pTHX_ PerlIO *f)
4231 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4232 IV code = PerlIO_flush(f);
4233 if (code == 0 && !b->buf) {
4234 code = PerlIOMmap_map(aTHX_ f);
4236 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4237 code = PerlIOBuf_fill(aTHX_ f);
4243 PerlIOMmap_close(pTHX_ PerlIO *f)
4245 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4246 PerlIOBuf *b = &m->base;
4247 IV code = PerlIO_flush(f);
4251 b->ptr = b->end = b->buf;
4253 if (PerlIOBuf_close(aTHX_ f) != 0)
4259 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4261 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4265 PerlIO_funcs PerlIO_mmap = {
4266 sizeof(PerlIO_funcs),
4269 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4273 PerlIOBase_binmode, /* binmode */
4287 PerlIOBase_clearerr,
4288 PerlIOBase_setlinebuf,
4289 PerlIOMmap_get_base,
4293 PerlIOBuf_set_ptrcnt,
4296 #endif /* HAS_MMAP */
4299 Perl_PerlIO_stdin(pTHX)
4302 PerlIO_stdstreams(aTHX);
4304 return &PL_perlio[1];
4308 Perl_PerlIO_stdout(pTHX)
4311 PerlIO_stdstreams(aTHX);
4313 return &PL_perlio[2];
4317 Perl_PerlIO_stderr(pTHX)
4320 PerlIO_stdstreams(aTHX);
4322 return &PL_perlio[3];
4325 /*--------------------------------------------------------------------------------------*/
4328 PerlIO_getname(PerlIO *f, char *buf)
4333 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4335 name = fgetname(stdio, buf);
4337 Perl_croak(aTHX_ "Don't know how to get file name");
4343 /*--------------------------------------------------------------------------------------*/
4345 * Functions which can be called on any kind of PerlIO implemented in
4349 #undef PerlIO_fdopen
4351 PerlIO_fdopen(int fd, const char *mode)
4354 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4359 PerlIO_open(const char *path, const char *mode)
4362 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4363 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4366 #undef Perlio_reopen
4368 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4371 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4372 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4377 PerlIO_getc(PerlIO *f)
4381 SSize_t count = PerlIO_read(f, buf, 1);
4383 return (unsigned char) buf[0];
4388 #undef PerlIO_ungetc
4390 PerlIO_ungetc(PerlIO *f, int ch)
4395 if (PerlIO_unread(f, &buf, 1) == 1)
4403 PerlIO_putc(PerlIO *f, int ch)
4407 return PerlIO_write(f, &buf, 1);
4412 PerlIO_puts(PerlIO *f, const char *s)
4415 STRLEN len = strlen(s);
4416 return PerlIO_write(f, s, len);
4419 #undef PerlIO_rewind
4421 PerlIO_rewind(PerlIO *f)
4424 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4428 #undef PerlIO_vprintf
4430 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4433 SV *sv = newSVpvn("", 0);
4439 Perl_va_copy(ap, apc);
4440 sv_vcatpvf(sv, fmt, &apc);
4442 sv_vcatpvf(sv, fmt, &ap);
4445 wrote = PerlIO_write(f, s, len);
4450 #undef PerlIO_printf
4452 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4457 result = PerlIO_vprintf(f, fmt, ap);
4462 #undef PerlIO_stdoutf
4464 PerlIO_stdoutf(const char *fmt, ...)
4470 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4475 #undef PerlIO_tmpfile
4477 PerlIO_tmpfile(void)
4480 * I have no idea how portable mkstemp() is ...
4482 #if defined(WIN32) || !defined(HAVE_MKSTEMP)
4485 FILE *stdio = PerlSIO_tmpfile();
4487 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), &PerlIO_stdio, "w+", Nullsv))) {
4488 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
4495 SV *sv = newSVpv("/tmp/PerlIO_XXXXXX", 0);
4496 int fd = mkstemp(SvPVX(sv));
4499 f = PerlIO_fdopen(fd, "w+");
4501 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4503 PerlLIO_unlink(SvPVX(sv));
4513 #endif /* USE_SFIO */
4514 #endif /* PERLIO_IS_STDIO */
4516 /*======================================================================================*/
4518 * Now some functions in terms of above which may be needed even if we are
4519 * not in true PerlIO mode
4523 #undef PerlIO_setpos
4525 PerlIO_setpos(PerlIO *f, SV *pos)
4530 Off_t *posn = (Off_t *) SvPV(pos, len);
4531 if (f && len == sizeof(Off_t))
4532 return PerlIO_seek(f, *posn, SEEK_SET);
4534 SETERRNO(EINVAL, SS$_IVCHAN);
4538 #undef PerlIO_setpos
4540 PerlIO_setpos(PerlIO *f, SV *pos)
4545 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4546 if (f && len == sizeof(Fpos_t)) {
4547 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4548 return fsetpos64(f, fpos);
4550 return fsetpos(f, fpos);
4554 SETERRNO(EINVAL, SS$_IVCHAN);
4560 #undef PerlIO_getpos
4562 PerlIO_getpos(PerlIO *f, SV *pos)
4565 Off_t posn = PerlIO_tell(f);
4566 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4567 return (posn == (Off_t) - 1) ? -1 : 0;
4570 #undef PerlIO_getpos
4572 PerlIO_getpos(PerlIO *f, SV *pos)
4577 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4578 code = fgetpos64(f, &fpos);
4580 code = fgetpos(f, &fpos);
4582 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4587 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4590 vprintf(char *pat, char *args)
4592 _doprnt(pat, args, stdout);
4593 return 0; /* wrong, but perl doesn't use the return
4598 vfprintf(FILE *fd, char *pat, char *args)
4600 _doprnt(pat, args, fd);
4601 return 0; /* wrong, but perl doesn't use the return
4607 #ifndef PerlIO_vsprintf
4609 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4611 int val = vsprintf(s, fmt, ap);
4613 if (strlen(s) >= (STRLEN) n) {
4615 (void) PerlIO_puts(Perl_error_log,
4616 "panic: sprintf overflow - memory corrupted!\n");
4624 #ifndef PerlIO_sprintf
4626 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4631 result = PerlIO_vsprintf(s, n, fmt, ap);