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
53 /* Call the callback or PerlIOBase, and return failure. */
54 #define PERL_PERLIO_BASE(f, callback, base, failure, args) \
55 if (PerlIOValid(f)) { \
56 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
57 if (tab && tab->callback) \
58 return (*tab->callback) args; \
60 return PerlIOBase_ ## base args; \
63 SETERRNO(EBADF, SS_IVCHAN); \
66 /* Call the callback or fail, and return failure. */
67 #define PERL_PERLIO_FAIL(f, callback, failure, args) \
68 if (PerlIOValid(f)) { \
69 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
70 if (tab && tab->callback) \
71 return (*tab->callback) args; \
72 SETERRNO(EINVAL, LIB_INVARG); \
75 SETERRNO(EBADF, SS_IVCHAN); \
78 /* Call the callback or PerlIOBase, and be void. */
79 #define PERL_PERLIO_VOID_BASE(f, callback, base, args) \
80 if (PerlIOValid(f)) { \
81 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
82 if (tab && tab->callback) \
83 (*tab->callback) args; \
85 PerlIOBase_ ## base args; \
86 SETERRNO(EINVAL, LIB_INVARG); \
89 SETERRNO(EBADF, SS_IVCHAN)
91 /* Call the callback or fail, and be void. */
92 #define PERL_PERLIO_VOID_FAIL(f, callback, args) \
93 if (PerlIOValid(f)) { \
94 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
95 if (tab && tab->callback) \
96 (*tab->callback) args; \
97 SETERRNO(EINVAL, LIB_INVARG); \
100 SETERRNO(EBADF, SS_IVCHAN)
103 perlsio_binmode(FILE *fp, int iotype, int mode)
106 * This used to be contents of do_binmode in doio.c
109 # if defined(atarist) || defined(__MINT__)
112 ((FILE *) fp)->_flag |= _IOBIN;
114 ((FILE *) fp)->_flag &= ~_IOBIN;
121 if (PerlLIO_setmode(fp, mode) != -1) {
123 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
125 # if defined(WIN32) && defined(__BORLANDC__)
127 * The translation mode of the stream is maintained independent of
128 * the translation mode of the fd in the Borland RTL (heavy
129 * digging through their runtime sources reveal). User has to set
130 * the mode explicitly for the stream (though they don't document
131 * this anywhere). GSAR 97-5-24
137 fp->flags &= ~_F_BIN;
145 # if defined(USEMYBINMODE)
147 if (my_binmode(fp, iotype, mode) != FALSE)
158 #define O_ACCMODE 3 /* Assume traditional implementation */
162 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
164 int result = rawmode & O_ACCMODE;
169 ptype = IoTYPE_RDONLY;
172 ptype = IoTYPE_WRONLY;
180 *writing = (result != O_RDONLY);
182 if (result == O_RDONLY) {
186 else if (rawmode & O_APPEND) {
188 if (result != O_WRONLY)
193 if (result == O_WRONLY)
200 if (rawmode & O_BINARY)
206 #ifndef PERLIO_LAYERS
208 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
210 if (!names || !*names
211 || strEQ(names, ":crlf")
212 || strEQ(names, ":raw")
213 || strEQ(names, ":bytes")
217 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
225 PerlIO_destruct(pTHX)
230 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
235 return perlsio_binmode(fp, iotype, mode);
240 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
245 #ifdef PERL_IMPLICIT_SYS
246 return PerlSIO_fdupopen(f);
249 return win32_fdupopen(f);
252 int fd = PerlLIO_dup(PerlIO_fileno(f));
255 int omode = fcntl(fd, F_GETFL);
257 omode = djgpp_get_stream_mode(f);
259 PerlIO_intmode2str(omode,mode,NULL);
260 /* the r+ is a hack */
261 return PerlIO_fdopen(fd, mode);
266 SETERRNO(EBADF, SS_IVCHAN);
276 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
280 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
281 int imode, int perm, PerlIO *old, int narg, SV **args)
285 Perl_croak(aTHX_ "More than one argument to open");
287 if (*args == &PL_sv_undef)
288 return PerlIO_tmpfile();
290 char *name = SvPV_nolen(*args);
292 fd = PerlLIO_open3(name, imode, perm);
294 return PerlIO_fdopen(fd, (char *) mode + 1);
297 return PerlIO_reopen(name, mode, old);
300 return PerlIO_open(name, mode);
305 return PerlIO_fdopen(fd, (char *) mode);
310 XS(XS_PerlIO__Layer__find)
314 Perl_croak(aTHX_ "Usage class->find(name[,load])");
316 char *name = SvPV_nolen(ST(1));
317 ST(0) = (strEQ(name, "crlf")
318 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
325 Perl_boot_core_PerlIO(pTHX)
327 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
333 #ifdef PERLIO_IS_STDIO
339 * Does nothing (yet) except force this file to be included in perl
340 * binary. That allows this file to force inclusion of other functions
341 * that may be required by loadable extensions e.g. for
342 * FileHandle::tmpfile
346 #undef PerlIO_tmpfile
353 #else /* PERLIO_IS_STDIO */
361 * This section is just to make sure these functions get pulled in from
365 #undef PerlIO_tmpfile
376 * Force this file to be included in perl binary. Which allows this
377 * file to force inclusion of other functions that may be required by
378 * loadable extensions e.g. for FileHandle::tmpfile
382 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
383 * results in a lot of lseek()s to regular files and lot of small
386 sfset(sfstdout, SF_SHARE, 0);
389 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
391 PerlIO_importFILE(FILE *stdio, const char *mode)
393 int fd = fileno(stdio);
394 if (!mode || !*mode) {
397 return PerlIO_fdopen(fd, mode);
401 PerlIO_findFILE(PerlIO *pio)
403 int fd = PerlIO_fileno(pio);
404 FILE *f = fdopen(fd, "r+");
406 if (!f && errno == EINVAL)
408 if (!f && errno == EINVAL)
415 /*======================================================================================*/
417 * Implement all the PerlIO interface ourselves.
423 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
430 #include <sys/mman.h>
434 void PerlIO_debug(const char *fmt, ...)
435 __attribute__ ((format(__printf__, 1, 2)));
438 PerlIO_debug(const char *fmt, ...)
445 char *s = PerlEnv_getenv("PERLIO_DEBUG");
447 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
454 /* Use fixed buffer as sv_catpvf etc. needs SVs */
458 s = CopFILE(PL_curcop);
461 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
462 len = strlen(buffer);
463 vsprintf(buffer+len, fmt, ap);
464 PerlLIO_write(dbg, buffer, strlen(buffer));
466 SV *sv = newSVpvn("", 0);
469 s = CopFILE(PL_curcop);
472 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
473 (IV) CopLINE(PL_curcop));
474 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
477 PerlLIO_write(dbg, s, len);
484 /*--------------------------------------------------------------------------------------*/
487 * Inner level routines
491 * Table of pointers to the PerlIO structs (malloc'ed)
493 #define PERLIO_TABLE_SIZE 64
496 PerlIO_allocate(pTHX)
499 * Find a free slot in the table, allocating new table as necessary
504 while ((f = *last)) {
506 last = (PerlIO **) (f);
507 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
513 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
521 #undef PerlIO_fdupopen
523 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
525 if (PerlIOValid(f)) {
526 PerlIO_funcs *tab = PerlIOBase(f)->tab;
528 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
529 new = (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX),f,param, flags);
533 SETERRNO(EBADF, SS_IVCHAN);
539 PerlIO_cleantable(pTHX_ PerlIO **tablep)
541 PerlIO *table = *tablep;
544 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
545 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
546 PerlIO *f = table + i;
558 PerlIO_list_alloc(pTHX)
561 Newz('L', list, 1, PerlIO_list_t);
567 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
570 if (--list->refcnt == 0) {
573 for (i = 0; i < list->cur; i++) {
574 if (list->array[i].arg)
575 SvREFCNT_dec(list->array[i].arg);
577 Safefree(list->array);
585 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
588 if (list->cur >= list->len) {
591 Renew(list->array, list->len, PerlIO_pair_t);
593 New('l', list->array, list->len, PerlIO_pair_t);
595 p = &(list->array[list->cur++]);
597 if ((p->arg = arg)) {
603 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
605 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
608 list = PerlIO_list_alloc(aTHX);
609 for (i=0; i < proto->cur; i++) {
611 if (proto->array[i].arg)
612 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
613 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
620 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
623 PerlIO **table = &proto->Iperlio;
626 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
627 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
628 PerlIO_allocate(aTHX); /* root slot is never used */
629 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
630 while ((f = *table)) {
632 table = (PerlIO **) (f++);
633 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
635 (void) fp_dup(f, 0, param);
644 PerlIO_destruct(pTHX)
646 PerlIO **table = &PL_perlio;
649 PerlIO_debug("Destruct %p\n",aTHX);
651 while ((f = *table)) {
653 table = (PerlIO **) (f++);
654 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
658 if (l->tab->kind & PERLIO_K_DESTRUCT) {
659 PerlIO_debug("Destruct popping %s\n", l->tab->name);
673 PerlIO_pop(pTHX_ PerlIO *f)
677 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
678 if (l->tab->Popped) {
680 * If popped returns non-zero do not free its layer structure
681 * it has either done so itself, or it is shared and still in
684 if ((*l->tab->Popped) (aTHX_ f) != 0)
692 /* Return as an array the stack of layers on a filehandle. Note that
693 * the stack is returned top-first in the array, and there are three
694 * times as many array elements as there are layers in the stack: the
695 * first element of a layer triplet is the name, the second one is the
696 * arguments, and the third one is the flags. */
699 PerlIO_get_layers(pTHX_ PerlIO *f)
703 if (PerlIOValid(f)) {
704 PerlIOl *l = PerlIOBase(f);
707 SV *name = l->tab && l->tab->name ?
708 newSVpv(l->tab->name, 0) : &PL_sv_undef;
709 SV *arg = l->tab && l->tab->Getarg ?
710 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
713 av_push(av, newSViv((IV)l->flags));
721 /*--------------------------------------------------------------------------------------*/
723 * XS Interface for perl code
727 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
730 if ((SSize_t) len <= 0)
732 for (i = 0; i < PL_known_layers->cur; i++) {
733 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
734 if (memEQ(f->name, name, len)) {
735 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
739 if (load && PL_subname && PL_def_layerlist
740 && PL_def_layerlist->cur >= 2) {
741 if (PL_in_load_module) {
742 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
745 SV *pkgsv = newSVpvn("PerlIO", 6);
746 SV *layer = newSVpvn(name, len);
747 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
749 SAVEINT(PL_in_load_module);
751 SAVESPTR(PL_warnhook);
752 PL_warnhook = (SV *) cv;
756 * The two SVs are magically freed by load_module
758 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
761 return PerlIO_find_layer(aTHX_ name, len, 0);
764 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
768 #ifdef USE_ATTRIBUTES_FOR_PERLIO
771 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
774 IO *io = GvIOn((GV *) SvRV(sv));
775 PerlIO *ifp = IoIFP(io);
776 PerlIO *ofp = IoOFP(io);
777 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
783 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
786 IO *io = GvIOn((GV *) SvRV(sv));
787 PerlIO *ifp = IoIFP(io);
788 PerlIO *ofp = IoOFP(io);
789 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
795 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
797 Perl_warn(aTHX_ "clear %" SVf, sv);
802 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
804 Perl_warn(aTHX_ "free %" SVf, sv);
808 MGVTBL perlio_vtab = {
816 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
819 SV *sv = SvRV(ST(1));
824 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
826 mg = mg_find(sv, PERL_MAGIC_ext);
827 mg->mg_virtual = &perlio_vtab;
829 Perl_warn(aTHX_ "attrib %" SVf, sv);
830 for (i = 2; i < items; i++) {
832 const char *name = SvPV(ST(i), len);
833 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
835 av_push(av, SvREFCNT_inc(layer));
846 #endif /* USE_ATTIBUTES_FOR_PERLIO */
849 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
851 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
852 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
856 XS(XS_PerlIO__Layer__NoWarnings)
858 /* This is used as a %SIG{__WARN__} handler to supress warnings
859 during loading of layers.
863 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
867 XS(XS_PerlIO__Layer__find)
871 Perl_croak(aTHX_ "Usage class->find(name[,load])");
874 char *name = SvPV(ST(1), len);
875 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
876 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
878 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
885 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
887 if (!PL_known_layers)
888 PL_known_layers = PerlIO_list_alloc(aTHX);
889 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
890 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
894 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
897 const char *s = names;
899 while (isSPACE(*s) || *s == ':')
904 const char *as = Nullch;
906 if (!isIDFIRST(*s)) {
908 * Message is consistent with how attribute lists are
909 * passed. Even though this means "foo : : bar" is
910 * seen as an invalid separator character.
912 char q = ((*s == '\'') ? '"' : '\'');
913 if (ckWARN(WARN_LAYER))
914 Perl_warner(aTHX_ packWARN(WARN_LAYER),
915 "perlio: invalid separator character %c%c%c in layer specification list %s",
917 SETERRNO(EINVAL, LIB_INVARG);
922 } while (isALNUM(*e));
938 * It's a nul terminated string, not allowed
939 * to \ the terminating null. Anything other
940 * character is passed over.
950 if (ckWARN(WARN_LAYER))
951 Perl_warner(aTHX_ packWARN(WARN_LAYER),
952 "perlio: argument list not closed for layer \"%.*s\"",
964 bool warn_layer = ckWARN(WARN_LAYER);
965 PerlIO_funcs *layer =
966 PerlIO_find_layer(aTHX_ s, llen, 1);
968 PerlIO_list_push(aTHX_ av, layer,
975 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
988 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
990 PerlIO_funcs *tab = &PerlIO_perlio;
991 #ifdef PERLIO_USING_CRLF
994 if (PerlIO_stdio.Set_ptrcnt)
997 PerlIO_debug("Pushing %s\n", tab->name);
998 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1003 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1005 return av->array[n].arg;
1009 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1011 if (n >= 0 && n < av->cur) {
1012 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1013 av->array[n].funcs->name);
1014 return av->array[n].funcs;
1017 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1022 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1024 if (PerlIOValid(f)) {
1026 PerlIO_pop(aTHX_ f);
1032 PerlIO_funcs PerlIO_remove = {
1033 sizeof(PerlIO_funcs),
1036 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1054 NULL, /* get_base */
1055 NULL, /* get_bufsiz */
1058 NULL, /* set_ptrcnt */
1062 PerlIO_default_layers(pTHX)
1064 if (!PL_def_layerlist) {
1065 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1066 PerlIO_funcs *osLayer = &PerlIO_unix;
1067 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1068 PerlIO_define_layer(aTHX_ & PerlIO_unix);
1069 #if defined(WIN32) && !defined(UNDER_CE)
1070 PerlIO_define_layer(aTHX_ & PerlIO_win32);
1072 osLayer = &PerlIO_win32;
1075 PerlIO_define_layer(aTHX_ & PerlIO_raw);
1076 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
1077 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
1078 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
1080 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
1082 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
1083 PerlIO_define_layer(aTHX_ & PerlIO_remove);
1084 PerlIO_define_layer(aTHX_ & PerlIO_byte);
1085 PerlIO_list_push(aTHX_ PL_def_layerlist,
1086 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1089 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1092 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1095 if (PL_def_layerlist->cur < 2) {
1096 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1098 return PL_def_layerlist;
1102 Perl_boot_core_PerlIO(pTHX)
1104 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1105 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1108 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1109 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1113 PerlIO_default_layer(pTHX_ I32 n)
1115 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1118 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1121 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1122 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1125 PerlIO_stdstreams(pTHX)
1128 PerlIO_allocate(aTHX);
1129 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1130 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1131 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1136 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1138 if (tab->fsize != sizeof(PerlIO_funcs)) {
1140 Perl_croak(aTHX_ "Layer does not match this perl");
1144 if (tab->size < sizeof(PerlIOl)) {
1147 /* Real layer with a data area */
1148 Newc('L',l,tab->size,char,PerlIOl);
1150 Zero(l, tab->size, char);
1154 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1155 (mode) ? mode : "(Null)", (void*)arg);
1156 if ((*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1157 PerlIO_pop(aTHX_ f);
1163 /* Pseudo-layer where push does its own stack adjust */
1164 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1165 (mode) ? mode : "(Null)", (void*)arg);
1166 if ((*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1174 PerlIOBase_binmode(pTHX_ PerlIO *f)
1176 if (PerlIOValid(f)) {
1177 /* Is layer suitable for raw stream ? */
1178 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1179 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1180 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1183 /* Not suitable - pop it */
1184 PerlIO_pop(aTHX_ f);
1192 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1195 if (PerlIOValid(f)) {
1200 * Strip all layers that are not suitable for a raw stream
1203 while (t && (l = *t)) {
1204 if (l->tab->Binmode) {
1205 /* Has a handler - normal case */
1206 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1208 /* Layer still there - move down a layer */
1217 /* No handler - pop it */
1218 PerlIO_pop(aTHX_ t);
1221 if (PerlIOValid(f)) {
1222 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1230 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1231 PerlIO_list_t *layers, IV n, IV max)
1235 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1237 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1248 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1252 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1253 code = PerlIO_parse_layers(aTHX_ layers, names);
1255 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1257 PerlIO_list_free(aTHX_ layers);
1263 /*--------------------------------------------------------------------------------------*/
1265 * Given the abstraction above the public API functions
1269 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1271 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1272 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1273 (names) ? names : "(Null)");
1275 /* Do not flush etc. if (e.g.) switching encodings.
1276 if a pushed layer knows it needs to flush lower layers
1277 (for example :unix which is never going to call them)
1278 it can do the flush when it is pushed.
1280 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1283 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1284 #ifdef PERLIO_USING_CRLF
1285 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1286 O_BINARY so we can look for it in mode.
1288 if (!(mode & O_BINARY)) {
1290 /* FIXME?: Looking down the layer stack seems wrong,
1291 but is a way of reaching past (say) an encoding layer
1292 to flip CRLF-ness of the layer(s) below
1295 /* Perhaps we should turn on bottom-most aware layer
1296 e.g. Ilya's idea that UNIX TTY could serve
1298 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1299 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1300 /* Not in text mode - flush any pending stuff and flip it */
1302 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1304 /* Only need to turn it on in one layer so we are done */
1309 /* Not finding a CRLF aware layer presumably means we are binary
1310 which is not what was requested - so we failed
1311 We _could_ push :crlf layer but so could caller
1316 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1317 So code that used to be here is now in PerlIORaw_pushed().
1319 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1324 PerlIO__close(pTHX_ PerlIO *f)
1327 return (*PerlIOBase(f)->tab->Close) (aTHX_ f);
1329 SETERRNO(EBADF, SS_IVCHAN);
1335 Perl_PerlIO_close(pTHX_ PerlIO *f)
1339 if (PerlIOValid(f)) {
1340 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1342 if (tab && tab->Close) {
1343 code = (*tab->Close)(aTHX_ f);
1345 PerlIO_pop(aTHX_ f);
1349 PerlIOBase_close(aTHX_ f);
1356 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1358 PERL_PERLIO_BASE(f, Fileno, fileno, -1, (aTHX_ f));
1362 PerlIO_context_layers(pTHX_ const char *mode)
1364 const char *type = NULL;
1366 * Need to supply default layer info from open.pm
1369 SV *layers = PL_curcop->cop_io;
1372 type = SvPV(layers, len);
1373 if (type && mode[0] != 'r') {
1375 * Skip to write part
1377 const char *s = strchr(type, 0);
1378 if (s && (STRLEN)(s - type) < len) {
1387 static PerlIO_funcs *
1388 PerlIO_layer_from_ref(pTHX_ SV *sv)
1391 * For any scalar type load the handler which is bundled with perl
1393 if (SvTYPE(sv) < SVt_PVAV)
1394 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1397 * For other types allow if layer is known but don't try and load it
1399 switch (SvTYPE(sv)) {
1401 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1403 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1405 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1407 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1413 PerlIO_resolve_layers(pTHX_ const char *layers,
1414 const char *mode, int narg, SV **args)
1416 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1419 PerlIO_stdstreams(aTHX);
1423 * If it is a reference but not an object see if we have a handler
1426 if (SvROK(arg) && !sv_isobject(arg)) {
1427 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1429 def = PerlIO_list_alloc(aTHX);
1430 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1434 * Don't fail if handler cannot be found :via(...) etc. may do
1435 * something sensible else we will just stringfy and open
1441 layers = PerlIO_context_layers(aTHX_ mode);
1442 if (layers && *layers) {
1446 av = PerlIO_list_alloc(aTHX);
1447 for (i = 0; i < def->cur; i++) {
1448 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1455 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1459 PerlIO_list_free(aTHX_ av);
1460 return (PerlIO_list_t *) NULL;
1471 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1472 int imode, int perm, PerlIO *f, int narg, SV **args)
1474 if (!f && narg == 1 && *args == &PL_sv_undef) {
1475 if ((f = PerlIO_tmpfile())) {
1477 layers = PerlIO_context_layers(aTHX_ mode);
1478 if (layers && *layers)
1479 PerlIO_apply_layers(aTHX_ f, mode, layers);
1483 PerlIO_list_t *layera = NULL;
1485 PerlIO_funcs *tab = NULL;
1486 if (PerlIOValid(f)) {
1488 * This is "reopen" - it is not tested as perl does not use it
1492 layera = PerlIO_list_alloc(aTHX);
1494 SV *arg = (l->tab->Getarg)
1495 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1497 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1498 l = *PerlIONext(&l);
1502 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1508 * Start at "top" of layer stack
1510 n = layera->cur - 1;
1512 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1521 * Found that layer 'n' can do opens - call it
1523 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1524 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1526 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1527 tab->name, layers, mode, fd, imode, perm,
1528 (void*)f, narg, (void*)args);
1529 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1532 if (n + 1 < layera->cur) {
1534 * More layers above the one that we used to open -
1537 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1538 /* If pushing layers fails close the file */
1545 PerlIO_list_free(aTHX_ layera);
1552 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1554 PERL_PERLIO_BASE(f, Read, read, -1, (aTHX_ f, vbuf, count));
1558 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1560 PERL_PERLIO_BASE(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1564 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1566 PERL_PERLIO_FAIL(f, Write, -1, (aTHX_ f, vbuf, count));
1570 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1572 PERL_PERLIO_FAIL(f, Seek, -1, (aTHX_ f, offset, whence));
1576 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1578 PERL_PERLIO_FAIL(f, Tell, -1, (aTHX_ f));
1582 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1586 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1588 if (tab && tab->Flush)
1589 return (*tab->Flush) (aTHX_ f);
1591 return 0; /* If no Flush defined, silently succeed. */
1594 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1595 SETERRNO(EBADF, SS_IVCHAN);
1601 * Is it good API design to do flush-all on NULL, a potentially
1602 * errorneous input? Maybe some magical value (PerlIO*
1603 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1604 * things on fflush(NULL), but should we be bound by their design
1607 PerlIO **table = &PL_perlio;
1609 while ((f = *table)) {
1611 table = (PerlIO **) (f++);
1612 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1613 if (*f && PerlIO_flush(f) != 0)
1623 PerlIOBase_flush_linebuf(pTHX)
1625 PerlIO **table = &PL_perlio;
1627 while ((f = *table)) {
1629 table = (PerlIO **) (f++);
1630 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1633 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1634 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1642 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1644 PERL_PERLIO_FAIL(f, Fill, -1, (aTHX_ f));
1648 PerlIO_isutf8(PerlIO *f)
1651 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1653 SETERRNO(EBADF, SS_IVCHAN);
1659 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1661 PERL_PERLIO_BASE(f, Eof, eof, -1, (aTHX_ f));
1665 Perl_PerlIO_error(pTHX_ PerlIO *f)
1667 PERL_PERLIO_BASE(f, Error, error, -1, (aTHX_ f));
1671 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1673 PERL_PERLIO_VOID_BASE(f, Clearerr, clearerr, (aTHX_ f));
1677 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1679 PERL_PERLIO_VOID_BASE(f, Setlinebuf, setlinebuf, (aTHX_ f));
1683 PerlIO_has_base(PerlIO *f)
1685 if (PerlIOValid(f)) {
1686 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1689 return (tab->Get_base != NULL);
1690 SETERRNO(EINVAL, LIB_INVARG);
1693 SETERRNO(EBADF, SS_IVCHAN);
1699 PerlIO_fast_gets(PerlIO *f)
1701 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1702 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1705 return (tab->Set_ptrcnt != NULL);
1706 SETERRNO(EINVAL, LIB_INVARG);
1709 SETERRNO(EBADF, SS_IVCHAN);
1715 PerlIO_has_cntptr(PerlIO *f)
1717 if (PerlIOValid(f)) {
1718 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1721 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1722 SETERRNO(EINVAL, LIB_INVARG);
1725 SETERRNO(EBADF, SS_IVCHAN);
1731 PerlIO_canset_cnt(PerlIO *f)
1733 if (PerlIOValid(f)) {
1734 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1737 return (tab->Set_ptrcnt != NULL);
1738 SETERRNO(EINVAL, LIB_INVARG);
1741 SETERRNO(EBADF, SS_IVCHAN);
1747 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1749 PERL_PERLIO_FAIL(f, Get_base, NULL, (aTHX_ f));
1753 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1755 PERL_PERLIO_FAIL(f, Get_bufsiz, -1, (aTHX_ f));
1759 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1761 PERL_PERLIO_FAIL(f, Get_ptr, NULL, (aTHX_ f));
1765 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1767 PERL_PERLIO_FAIL(f, Get_cnt, -1, (aTHX_ f));
1771 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1773 PERL_PERLIO_VOID_FAIL(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1777 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1779 PERL_PERLIO_VOID_FAIL(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1783 /*--------------------------------------------------------------------------------------*/
1785 * utf8 and raw dummy layers
1789 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1791 if (PerlIOValid(f)) {
1792 if (tab->kind & PERLIO_K_UTF8)
1793 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1795 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1801 PerlIO_funcs PerlIO_utf8 = {
1802 sizeof(PerlIO_funcs),
1805 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1823 NULL, /* get_base */
1824 NULL, /* get_bufsiz */
1827 NULL, /* set_ptrcnt */
1830 PerlIO_funcs PerlIO_byte = {
1831 sizeof(PerlIO_funcs),
1852 NULL, /* get_base */
1853 NULL, /* get_bufsiz */
1856 NULL, /* set_ptrcnt */
1860 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1861 IV n, const char *mode, int fd, int imode, int perm,
1862 PerlIO *old, int narg, SV **args)
1864 PerlIO_funcs *tab = PerlIO_default_btm();
1865 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1869 PerlIO_funcs PerlIO_raw = {
1870 sizeof(PerlIO_funcs),
1891 NULL, /* get_base */
1892 NULL, /* get_bufsiz */
1895 NULL, /* set_ptrcnt */
1897 /*--------------------------------------------------------------------------------------*/
1898 /*--------------------------------------------------------------------------------------*/
1900 * "Methods" of the "base class"
1904 PerlIOBase_fileno(pTHX_ PerlIO *f)
1906 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1910 PerlIO_modestr(PerlIO * f, char *buf)
1913 if (PerlIOValid(f)) {
1914 IV flags = PerlIOBase(f)->flags;
1915 if (flags & PERLIO_F_APPEND) {
1917 if (flags & PERLIO_F_CANREAD) {
1921 else if (flags & PERLIO_F_CANREAD) {
1923 if (flags & PERLIO_F_CANWRITE)
1926 else if (flags & PERLIO_F_CANWRITE) {
1928 if (flags & PERLIO_F_CANREAD) {
1932 #ifdef PERLIO_USING_CRLF
1933 if (!(flags & PERLIO_F_CRLF))
1943 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1945 PerlIOl *l = PerlIOBase(f);
1947 const char *omode = mode;
1950 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1951 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1952 if (tab->Set_ptrcnt != NULL)
1953 l->flags |= PERLIO_F_FASTGETS;
1955 if (*mode == '#' || *mode == 'I')
1959 l->flags |= PERLIO_F_CANREAD;
1962 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1965 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1968 SETERRNO(EINVAL, LIB_INVARG);
1974 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1977 l->flags &= ~PERLIO_F_CRLF;
1980 l->flags |= PERLIO_F_CRLF;
1983 SETERRNO(EINVAL, LIB_INVARG);
1990 l->flags |= l->next->flags &
1991 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
1996 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
1997 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
1998 l->flags, PerlIO_modestr(f, temp));
2004 PerlIOBase_popped(pTHX_ PerlIO *f)
2010 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2013 * Save the position as current head considers it
2015 Off_t old = PerlIO_tell(f);
2017 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
2018 PerlIOSelf(f, PerlIOBuf)->posn = old;
2019 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
2024 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2026 STDCHAR *buf = (STDCHAR *) vbuf;
2028 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2031 SSize_t avail = PerlIO_get_cnt(f);
2034 take = ((SSize_t)count < avail) ? count : avail;
2036 STDCHAR *ptr = PerlIO_get_ptr(f);
2037 Copy(ptr, buf, take, STDCHAR);
2038 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2042 if (count > 0 && avail <= 0) {
2043 if (PerlIO_fill(f) != 0)
2047 return (buf - (STDCHAR *) vbuf);
2053 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2059 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2065 PerlIOBase_close(pTHX_ PerlIO *f)
2068 PerlIO *n = PerlIONext(f);
2069 if (PerlIO_flush(f) != 0)
2071 if (PerlIOValid(n) && (*PerlIOBase(n)->tab->Close)(aTHX_ n) != 0)
2073 PerlIOBase(f)->flags &=
2074 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2079 PerlIOBase_eof(pTHX_ PerlIO *f)
2081 if (PerlIOValid(f)) {
2082 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2088 PerlIOBase_error(pTHX_ PerlIO *f)
2090 if (PerlIOValid(f)) {
2091 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2097 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2099 if (PerlIOValid(f)) {
2100 PerlIO *n = PerlIONext(f);
2101 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2108 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2110 if (PerlIOValid(f)) {
2111 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2116 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2122 return sv_dup(arg, param);
2125 return newSVsv(arg);
2128 return newSVsv(arg);
2133 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2135 PerlIO *nexto = PerlIONext(o);
2136 if (PerlIOValid(nexto)) {
2137 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2138 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2141 PerlIO_funcs *self = PerlIOBase(o)->tab;
2144 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2145 self->name, (void*)f, (void*)o, (void*)param);
2147 arg = (*self->Getarg)(aTHX_ o,param,flags);
2149 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2157 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2159 perl_mutex PerlIO_mutex;
2161 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2166 /* Place holder for stdstreams call ??? */
2168 MUTEX_INIT(&PerlIO_mutex);
2173 PerlIOUnix_refcnt_inc(int fd)
2175 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2177 MUTEX_LOCK(&PerlIO_mutex);
2179 PerlIO_fd_refcnt[fd]++;
2180 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2182 MUTEX_UNLOCK(&PerlIO_mutex);
2188 PerlIOUnix_refcnt_dec(int fd)
2191 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2193 MUTEX_LOCK(&PerlIO_mutex);
2195 cnt = --PerlIO_fd_refcnt[fd];
2196 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2198 MUTEX_UNLOCK(&PerlIO_mutex);
2205 PerlIO_cleanup(pTHX)
2209 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2211 PerlIO_debug("Cleanup layers\n");
2213 /* Raise STDIN..STDERR refcount so we don't close them */
2214 for (i=0; i < 3; i++)
2215 PerlIOUnix_refcnt_inc(i);
2216 PerlIO_cleantable(aTHX_ &PL_perlio);
2217 /* Restore STDIN..STDERR refcount */
2218 for (i=0; i < 3; i++)
2219 PerlIOUnix_refcnt_dec(i);
2221 if (PL_known_layers) {
2222 PerlIO_list_free(aTHX_ PL_known_layers);
2223 PL_known_layers = NULL;
2225 if(PL_def_layerlist) {
2226 PerlIO_list_free(aTHX_ PL_def_layerlist);
2227 PL_def_layerlist = NULL;
2233 /*--------------------------------------------------------------------------------------*/
2235 * Bottom-most level for UNIX-like case
2239 struct _PerlIO base; /* The generic part */
2240 int fd; /* UNIX like file descriptor */
2241 int oflags; /* open/fcntl flags */
2245 PerlIOUnix_oflags(const char *mode)
2248 if (*mode == 'I' || *mode == '#')
2253 if (*++mode == '+') {
2260 oflags = O_CREAT | O_TRUNC;
2261 if (*++mode == '+') {
2270 oflags = O_CREAT | O_APPEND;
2271 if (*++mode == '+') {
2284 else if (*mode == 't') {
2286 oflags &= ~O_BINARY;
2290 * Always open in binary mode
2293 if (*mode || oflags == -1) {
2294 SETERRNO(EINVAL, LIB_INVARG);
2301 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2303 return PerlIOSelf(f, PerlIOUnix)->fd;
2307 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2309 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2310 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2311 if (*PerlIONext(f)) {
2312 /* We never call down so do any pending stuff now */
2313 PerlIO_flush(PerlIONext(f));
2314 s->fd = PerlIO_fileno(PerlIONext(f));
2316 * XXX could (or should) we retrieve the oflags from the open file
2317 * handle rather than believing the "mode" we are passed in? XXX
2318 * Should the value on NULL mode be 0 or -1?
2320 s->oflags = mode ? PerlIOUnix_oflags(mode) : -1;
2322 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2327 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2328 IV n, const char *mode, int fd, int imode,
2329 int perm, PerlIO *f, int narg, SV **args)
2331 if (PerlIOValid(f)) {
2332 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2333 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2336 char *path = SvPV_nolen(*args);
2340 imode = PerlIOUnix_oflags(mode);
2344 fd = PerlLIO_open3(path, imode, perm);
2352 f = PerlIO_allocate(aTHX);
2354 if (!PerlIOValid(f)) {
2355 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2359 s = PerlIOSelf(f, PerlIOUnix);
2362 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2363 PerlIOUnix_refcnt_inc(fd);
2369 * FIXME: pop layers ???
2377 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2379 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2381 if (flags & PERLIO_DUP_FD) {
2382 fd = PerlLIO_dup(fd);
2384 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2385 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2387 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2388 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2390 PerlIOUnix_refcnt_inc(fd);
2399 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2401 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2402 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2403 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2407 SSize_t len = PerlLIO_read(fd, vbuf, count);
2408 if (len >= 0 || errno != EINTR) {
2410 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2411 else if (len == 0 && count != 0)
2412 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2420 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2422 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2424 SSize_t len = PerlLIO_write(fd, vbuf, count);
2425 if (len >= 0 || errno != EINTR) {
2427 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2435 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2438 PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, offset, whence);
2439 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2440 return (new == (Off_t) - 1) ? -1 : 0;
2444 PerlIOUnix_tell(pTHX_ PerlIO *f)
2446 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2451 PerlIOUnix_close(pTHX_ PerlIO *f)
2453 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2455 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2456 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2457 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2462 SETERRNO(EBADF,SS_IVCHAN);
2465 while (PerlLIO_close(fd) != 0) {
2466 if (errno != EINTR) {
2473 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2478 PerlIO_funcs PerlIO_unix = {
2479 sizeof(PerlIO_funcs),
2486 PerlIOBase_binmode, /* binmode */
2496 PerlIOBase_noop_ok, /* flush */
2497 PerlIOBase_noop_fail, /* fill */
2500 PerlIOBase_clearerr,
2501 PerlIOBase_setlinebuf,
2502 NULL, /* get_base */
2503 NULL, /* get_bufsiz */
2506 NULL, /* set_ptrcnt */
2509 /*--------------------------------------------------------------------------------------*/
2514 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2515 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2516 broken by the last second glibc 2.3 fix
2518 #define STDIO_BUFFER_WRITABLE
2523 struct _PerlIO base;
2524 FILE *stdio; /* The stream */
2528 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2531 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2532 return PerlSIO_fileno(s);
2539 PerlIOStdio_mode(const char *mode, char *tmode)
2545 #ifdef PERLIO_USING_CRLF
2553 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2556 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2557 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2558 if (toptab == tab) {
2559 /* Top is already stdio - pop self (duplicate) and use original */
2560 PerlIO_pop(aTHX_ f);
2563 int fd = PerlIO_fileno(n);
2566 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2567 mode = PerlIOStdio_mode(mode, tmode)))) {
2568 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2569 /* We never call down so do any pending stuff now */
2570 PerlIO_flush(PerlIONext(f));
2577 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2582 PerlIO_importFILE(FILE *stdio, const char *mode)
2588 if (!mode || !*mode) {
2589 /* We need to probe to see how we can open the stream
2590 so start with read/write and then try write and read
2591 we dup() so that we can fclose without loosing the fd.
2593 Note that the errno value set by a failing fdopen
2594 varies between stdio implementations.
2596 int fd = PerlLIO_dup(fileno(stdio));
2597 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2599 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2602 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2605 /* Don't seem to be able to open */
2611 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2612 s = PerlIOSelf(f, PerlIOStdio);
2620 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2621 IV n, const char *mode, int fd, int imode,
2622 int perm, PerlIO *f, int narg, SV **args)
2625 if (PerlIOValid(f)) {
2626 char *path = SvPV_nolen(*args);
2627 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2629 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2630 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2635 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2640 char *path = SvPV_nolen(*args);
2643 fd = PerlLIO_open3(path, imode, perm);
2646 FILE *stdio = PerlSIO_fopen(path, mode);
2650 f = PerlIO_allocate(aTHX);
2652 if ((f = PerlIO_push(aTHX_ f, self,
2653 (mode = PerlIOStdio_mode(mode, tmode)),
2655 s = PerlIOSelf(f, PerlIOStdio);
2657 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2676 stdio = PerlSIO_stdin;
2679 stdio = PerlSIO_stdout;
2682 stdio = PerlSIO_stderr;
2687 stdio = PerlSIO_fdopen(fd, mode =
2688 PerlIOStdio_mode(mode, tmode));
2693 f = PerlIO_allocate(aTHX);
2695 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2696 s = PerlIOSelf(f, PerlIOStdio);
2698 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2708 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2710 /* This assumes no layers underneath - which is what
2711 happens, but is not how I remember it. NI-S 2001/10/16
2713 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2714 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2715 int fd = fileno(stdio);
2717 if (flags & PERLIO_DUP_FD) {
2718 int dfd = PerlLIO_dup(fileno(stdio));
2720 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2724 /* FIXME: To avoid messy error recovery if dup fails
2725 re-use the existing stdio as though flag was not set
2729 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2731 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2732 PerlIOUnix_refcnt_inc(fileno(stdio));
2738 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2740 /* XXX this could use PerlIO_canset_fileno() and
2741 * PerlIO_set_fileno() support from Configure
2743 # if defined(__GLIBC__)
2744 /* There may be a better way for GLIBC:
2745 - libio.h defines a flag to not close() on cleanup
2749 # elif defined(__sun__)
2751 /* On solaris, if _LP64 is defined, the FILE structure is this:
2757 * It turns out that the fd is stored in the top 32 bits of
2758 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2759 * to contain a pointer or offset into another structure. All the
2760 * remaining fields are zero.
2762 * We set the top bits to -1 (0xFFFFFFFF).
2764 f->__pad[4] |= 0xffffffff00000000L;
2765 assert(fileno(f) == 0xffffffff);
2766 # else /* !defined(_LP64) */
2767 /* _file is just a unsigned char :-(
2768 Not clear why we dup() rather than using -1
2769 even if that would be treated as 0xFF - so will
2772 f->_file = PerlLIO_dup(fileno(f));
2773 # endif /* defined(_LP64) */
2775 # elif defined(__hpux)
2779 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2780 your platform does not have special entry try this one.
2781 [For OSF only have confirmation for Tru64 (alpha)
2782 but assume other OSFs will be similar.]
2784 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2787 # elif defined(__FreeBSD__)
2788 /* There may be a better way on FreeBSD:
2789 - we could insert a dummy func in the _close function entry
2790 f->_close = (int (*)(void *)) dummy_close;
2794 # elif defined(__CYGWIN__)
2795 /* There may be a better way on CYGWIN:
2796 - we could insert a dummy func in the _close function entry
2797 f->_close = (int (*)(void *)) dummy_close;
2801 # elif defined(WIN32)
2802 # if defined(__BORLANDC__)
2803 f->fd = PerlLIO_dup(fileno(f));
2804 # elif defined(UNDER_CE)
2805 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2814 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2815 (which isn't thread safe) instead
2817 # error "Don't know how to set FILE.fileno on your platform"
2824 PerlIOStdio_close(pTHX_ PerlIO *f)
2826 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2832 int fd = fileno(stdio);
2838 #ifdef SOCKS5_VERSION_NAME
2839 /* Socks lib overrides close() but stdio isn't linked to
2840 that library (though we are) - so we must call close()
2841 on sockets on stdio's behalf.
2844 Sock_size_t optlen = sizeof(int);
2845 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2850 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2851 /* File descriptor still in use */
2856 /* For STD* handles don't close the stdio at all
2857 this is because we have shared the FILE * too
2859 if (stdio == stdin) {
2860 /* Some stdios are buggy fflush-ing inputs */
2863 else if (stdio == stdout || stdio == stderr) {
2864 return PerlIO_flush(f);
2866 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2867 Use Sarathy's trick from maint-5.6 to invalidate the
2868 fileno slot of the FILE *
2870 result = PerlIO_flush(f);
2872 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
2873 dupfd = PerlLIO_dup(fd);
2876 result = PerlSIO_fclose(stdio);
2877 /* We treat error from stdio as success if we invalidated
2878 errno may NOT be expected EBADF
2880 if (invalidate && result != 0) {
2885 /* in SOCKS case let close() determine return value */
2889 PerlLIO_dup2(dupfd,fd);
2897 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2899 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2903 STDCHAR *buf = (STDCHAR *) vbuf;
2905 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
2906 * stdio does not do that for fread()
2908 int ch = PerlSIO_fgetc(s);
2915 got = PerlSIO_fread(vbuf, 1, count, s);
2916 if (got || errno != EINTR)
2919 errno = 0; /* just in case */
2925 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2928 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
2930 #ifdef STDIO_BUFFER_WRITABLE
2931 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
2932 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2933 STDCHAR *base = PerlIO_get_base(f);
2934 SSize_t cnt = PerlIO_get_cnt(f);
2935 STDCHAR *ptr = PerlIO_get_ptr(f);
2936 SSize_t avail = ptr - base;
2938 if (avail > count) {
2942 Move(buf-avail,ptr,avail,STDCHAR);
2945 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
2946 if (PerlSIO_feof(s) && unread >= 0)
2947 PerlSIO_clearerr(s);
2952 if (PerlIO_has_cntptr(f)) {
2953 /* We can get pointer to buffer but not its base
2954 Do ungetc() but check chars are ending up in the
2957 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
2958 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
2960 int ch = *--buf & 0xFF;
2961 if (ungetc(ch,s) != ch) {
2962 /* ungetc did not work */
2965 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
2966 /* Did not change pointer as expected */
2967 fgetc(s); /* get char back again */
2977 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
2983 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2987 got = PerlSIO_fwrite(vbuf, 1, count,
2988 PerlIOSelf(f, PerlIOStdio)->stdio);
2989 if (got || errno != EINTR)
2992 errno = 0; /* just in case */
2998 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3000 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3001 return PerlSIO_fseek(stdio, offset, whence);
3005 PerlIOStdio_tell(pTHX_ PerlIO *f)
3007 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3008 return PerlSIO_ftell(stdio);
3012 PerlIOStdio_flush(pTHX_ PerlIO *f)
3014 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3015 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3016 return PerlSIO_fflush(stdio);
3021 * FIXME: This discards ungetc() and pre-read stuff which is not
3022 * right if this is just a "sync" from a layer above Suspect right
3023 * design is to do _this_ but not have layer above flush this
3024 * layer read-to-read
3027 * Not writeable - sync by attempting a seek
3030 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3038 PerlIOStdio_eof(pTHX_ PerlIO *f)
3040 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3044 PerlIOStdio_error(pTHX_ PerlIO *f)
3046 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3050 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3052 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3056 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3058 #ifdef HAS_SETLINEBUF
3059 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3061 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3067 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3069 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3070 return (STDCHAR*)PerlSIO_get_base(stdio);
3074 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3076 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3077 return PerlSIO_get_bufsiz(stdio);
3081 #ifdef USE_STDIO_PTR
3083 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3085 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3086 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3090 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3092 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3093 return PerlSIO_get_cnt(stdio);
3097 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3099 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3101 #ifdef STDIO_PTR_LVALUE
3102 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3103 #ifdef STDIO_PTR_LVAL_SETS_CNT
3104 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3105 assert(PerlSIO_get_cnt(stdio) == (cnt));
3108 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3110 * Setting ptr _does_ change cnt - we are done
3114 #else /* STDIO_PTR_LVALUE */
3116 #endif /* STDIO_PTR_LVALUE */
3119 * Now (or only) set cnt
3121 #ifdef STDIO_CNT_LVALUE
3122 PerlSIO_set_cnt(stdio, cnt);
3123 #else /* STDIO_CNT_LVALUE */
3124 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3125 PerlSIO_set_ptr(stdio,
3126 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3128 #else /* STDIO_PTR_LVAL_SETS_CNT */
3130 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3131 #endif /* STDIO_CNT_LVALUE */
3138 PerlIOStdio_fill(pTHX_ PerlIO *f)
3140 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3143 * fflush()ing read-only streams can cause trouble on some stdio-s
3145 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3146 if (PerlSIO_fflush(stdio) != 0)
3149 c = PerlSIO_fgetc(stdio);
3153 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3155 #ifdef STDIO_BUFFER_WRITABLE
3156 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3157 /* Fake ungetc() to the real buffer in case system's ungetc
3160 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3161 SSize_t cnt = PerlSIO_get_cnt(stdio);
3162 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3163 if (ptr == base+1) {
3164 *--ptr = (STDCHAR) c;
3165 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3166 if (PerlSIO_feof(stdio))
3167 PerlSIO_clearerr(stdio);
3173 if (PerlIO_has_cntptr(f)) {
3175 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3182 /* An ungetc()d char is handled separately from the regular
3183 * buffer, so we stuff it in the buffer ourselves.
3184 * Should never get called as should hit code above
3186 *(--((*stdio)->_ptr)) = (unsigned char) c;
3189 /* If buffer snoop scheme above fails fall back to
3192 if (PerlSIO_ungetc(c, stdio) != c)
3200 PerlIO_funcs PerlIO_stdio = {
3201 sizeof(PerlIO_funcs),
3203 sizeof(PerlIOStdio),
3204 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3208 PerlIOBase_binmode, /* binmode */
3222 PerlIOStdio_clearerr,
3223 PerlIOStdio_setlinebuf,
3225 PerlIOStdio_get_base,
3226 PerlIOStdio_get_bufsiz,
3231 #ifdef USE_STDIO_PTR
3232 PerlIOStdio_get_ptr,
3233 PerlIOStdio_get_cnt,
3234 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3235 PerlIOStdio_set_ptrcnt,
3238 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3243 #endif /* USE_STDIO_PTR */
3246 /* Note that calls to PerlIO_exportFILE() are reversed using
3247 * PerlIO_releaseFILE(), not importFILE. */
3249 PerlIO_exportFILE(PerlIO * f, const char *mode)
3253 if (PerlIOValid(f)) {
3256 if (!mode || !*mode) {
3257 mode = PerlIO_modestr(f, buf);
3259 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3262 /* De-link any lower layers so new :stdio sticks */
3264 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3265 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3267 /* Link previous lower layers under new one */
3271 /* restore layers list */
3281 PerlIO_findFILE(PerlIO *f)
3285 if (l->tab == &PerlIO_stdio) {
3286 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3289 l = *PerlIONext(&l);
3291 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3292 return PerlIO_exportFILE(f, Nullch);
3295 /* Use this to reverse PerlIO_exportFILE calls. */
3297 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3301 if (l->tab == &PerlIO_stdio) {
3302 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3303 if (s->stdio == f) {
3305 PerlIO_pop(aTHX_ p);
3314 /*--------------------------------------------------------------------------------------*/
3316 * perlio buffer layer
3320 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3322 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3323 int fd = PerlIO_fileno(f);
3324 if (fd >= 0 && PerlLIO_isatty(fd)) {
3325 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3327 if (*PerlIONext(f)) {
3328 Off_t posn = PerlIO_tell(PerlIONext(f));
3329 if (posn != (Off_t) - 1) {
3333 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3337 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3338 IV n, const char *mode, int fd, int imode, int perm,
3339 PerlIO *f, int narg, SV **args)
3341 if (PerlIOValid(f)) {
3342 PerlIO *next = PerlIONext(f);
3343 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3344 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3346 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3351 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3359 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3362 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3364 * if push fails during open, open fails. close will pop us.
3369 fd = PerlIO_fileno(f);
3370 if (init && fd == 2) {
3372 * Initial stderr is unbuffered
3374 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3376 #ifdef PERLIO_USING_CRLF
3377 # ifdef PERLIO_IS_BINMODE_FD
3378 if (PERLIO_IS_BINMODE_FD(fd))
3379 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3383 * do something about failing setmode()? --jhi
3385 PerlLIO_setmode(fd, O_BINARY);
3394 * This "flush" is akin to sfio's sync in that it handles files in either
3395 * read or write state
3398 PerlIOBuf_flush(pTHX_ PerlIO *f)
3400 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3402 PerlIO *n = PerlIONext(f);
3403 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3405 * write() the buffer
3407 STDCHAR *buf = b->buf;
3409 while (p < b->ptr) {
3410 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3414 else if (count < 0 || PerlIO_error(n)) {
3415 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3420 b->posn += (p - buf);
3422 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3423 STDCHAR *buf = PerlIO_get_base(f);
3425 * Note position change
3427 b->posn += (b->ptr - buf);
3428 if (b->ptr < b->end) {
3429 /* We did not consume all of it - try and seek downstream to
3430 our logical position
3432 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3433 /* Reload n as some layers may pop themselves on seek */
3434 b->posn = PerlIO_tell(n = PerlIONext(f));
3437 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3438 data is lost for good - so return saying "ok" having undone
3441 b->posn -= (b->ptr - buf);
3446 b->ptr = b->end = b->buf;
3447 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3448 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3449 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3455 PerlIOBuf_fill(pTHX_ PerlIO *f)
3457 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3458 PerlIO *n = PerlIONext(f);
3461 * Down-stream flush is defined not to loose read data so is harmless.
3462 * we would not normally be fill'ing if there was data left in anycase.
3464 if (PerlIO_flush(f) != 0)
3466 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3467 PerlIOBase_flush_linebuf(aTHX);
3470 PerlIO_get_base(f); /* allocate via vtable */
3472 b->ptr = b->end = b->buf;
3474 if (!PerlIOValid(n)) {
3475 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3479 if (PerlIO_fast_gets(n)) {
3481 * Layer below is also buffered. We do _NOT_ want to call its
3482 * ->Read() because that will loop till it gets what we asked for
3483 * which may hang on a pipe etc. Instead take anything it has to
3484 * hand, or ask it to fill _once_.
3486 avail = PerlIO_get_cnt(n);
3488 avail = PerlIO_fill(n);
3490 avail = PerlIO_get_cnt(n);
3492 if (!PerlIO_error(n) && PerlIO_eof(n))
3497 STDCHAR *ptr = PerlIO_get_ptr(n);
3498 SSize_t cnt = avail;
3499 if (avail > (SSize_t)b->bufsiz)
3501 Copy(ptr, b->buf, avail, STDCHAR);
3502 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3506 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3510 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3512 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3515 b->end = b->buf + avail;
3516 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3521 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3523 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3524 if (PerlIOValid(f)) {
3527 return PerlIOBase_read(aTHX_ f, vbuf, count);
3533 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3535 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3536 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3539 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3544 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3546 * Buffer is already a read buffer, we can overwrite any chars
3547 * which have been read back to buffer start
3549 avail = (b->ptr - b->buf);
3553 * Buffer is idle, set it up so whole buffer is available for
3557 b->end = b->buf + avail;
3559 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3561 * Buffer extends _back_ from where we are now
3563 b->posn -= b->bufsiz;
3565 if (avail > (SSize_t) count) {
3567 * If we have space for more than count, just move count
3575 * In simple stdio-like ungetc() case chars will be already
3578 if (buf != b->ptr) {
3579 Copy(buf, b->ptr, avail, STDCHAR);
3583 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3587 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3593 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3595 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3596 const STDCHAR *buf = (const STDCHAR *) vbuf;
3600 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3602 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3603 if (PerlIO_flush(f) != 0) {
3608 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3609 if ((SSize_t) count < avail)
3611 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3612 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3627 Copy(buf, b->ptr, avail, STDCHAR);
3634 if (b->ptr >= (b->buf + b->bufsiz))
3637 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3643 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3646 if ((code = PerlIO_flush(f)) == 0) {
3647 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3648 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3649 code = PerlIO_seek(PerlIONext(f), offset, whence);
3651 b->posn = PerlIO_tell(PerlIONext(f));
3658 PerlIOBuf_tell(pTHX_ PerlIO *f)
3660 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3662 * b->posn is file position where b->buf was read, or will be written
3664 Off_t posn = b->posn;
3665 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3666 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3668 /* As O_APPEND files are normally shared in some sense it is better
3673 /* when file is NOT shared then this is sufficient */
3674 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3676 posn = b->posn = PerlIO_tell(PerlIONext(f));
3680 * If buffer is valid adjust position by amount in buffer
3682 posn += (b->ptr - b->buf);
3688 PerlIOBuf_popped(pTHX_ PerlIO *f)
3690 IV code = PerlIOBase_popped(aTHX_ f);
3691 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3692 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3696 b->ptr = b->end = b->buf;
3697 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3702 PerlIOBuf_close(pTHX_ PerlIO *f)
3704 IV code = PerlIOBase_close(aTHX_ f);
3705 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3706 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3710 b->ptr = b->end = b->buf;
3711 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3716 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3718 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3725 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3727 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3730 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3731 return (b->end - b->ptr);
3736 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3738 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3743 Newz('B',b->buf,b->bufsiz, STDCHAR);
3745 b->buf = (STDCHAR *) & b->oneword;
3746 b->bufsiz = sizeof(b->oneword);
3755 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3757 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3760 return (b->end - b->buf);
3764 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3766 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3770 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3771 assert(PerlIO_get_cnt(f) == cnt);
3772 assert(b->ptr >= b->buf);
3774 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3778 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3780 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3785 PerlIO_funcs PerlIO_perlio = {
3786 sizeof(PerlIO_funcs),
3789 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3793 PerlIOBase_binmode, /* binmode */
3807 PerlIOBase_clearerr,
3808 PerlIOBase_setlinebuf,
3813 PerlIOBuf_set_ptrcnt,
3816 /*--------------------------------------------------------------------------------------*/
3818 * Temp layer to hold unread chars when cannot do it any other way
3822 PerlIOPending_fill(pTHX_ PerlIO *f)
3825 * Should never happen
3832 PerlIOPending_close(pTHX_ PerlIO *f)
3835 * A tad tricky - flush pops us, then we close new top
3838 return PerlIO_close(f);
3842 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3845 * A tad tricky - flush pops us, then we seek new top
3848 return PerlIO_seek(f, offset, whence);
3853 PerlIOPending_flush(pTHX_ PerlIO *f)
3855 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3856 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3860 PerlIO_pop(aTHX_ f);
3865 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3871 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
3876 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3878 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3879 PerlIOl *l = PerlIOBase(f);
3881 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
3882 * etc. get muddled when it changes mid-string when we auto-pop.
3884 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
3885 (PerlIOBase(PerlIONext(f))->
3886 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
3891 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3893 SSize_t avail = PerlIO_get_cnt(f);
3895 if ((SSize_t)count < avail)
3898 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
3899 if (got >= 0 && got < (SSize_t)count) {
3901 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
3902 if (more >= 0 || got == 0)
3908 PerlIO_funcs PerlIO_pending = {
3909 sizeof(PerlIO_funcs),
3912 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
3913 PerlIOPending_pushed,
3916 PerlIOBase_binmode, /* binmode */
3925 PerlIOPending_close,
3926 PerlIOPending_flush,
3930 PerlIOBase_clearerr,
3931 PerlIOBase_setlinebuf,
3936 PerlIOPending_set_ptrcnt,
3941 /*--------------------------------------------------------------------------------------*/
3943 * crlf - translation On read translate CR,LF to "\n" we do this by
3944 * overriding ptr/cnt entries to hand back a line at a time and keeping a
3945 * record of which nl we "lied" about. On write translate "\n" to CR,LF
3949 PerlIOBuf base; /* PerlIOBuf stuff */
3950 STDCHAR *nl; /* Position of crlf we "lied" about in the
3955 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3958 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
3959 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
3961 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
3962 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
3963 PerlIOBase(f)->flags);
3970 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3972 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
3977 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
3978 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
3980 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3981 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3983 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3988 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
3989 b->end = b->ptr = b->buf + b->bufsiz;
3990 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3991 b->posn -= b->bufsiz;
3993 while (count > 0 && b->ptr > b->buf) {
3996 if (b->ptr - 2 >= b->buf) {
4019 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4021 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4024 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4025 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4026 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4027 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4029 while (nl < b->end && *nl != 0xd)
4031 if (nl < b->end && *nl == 0xd) {
4033 if (nl + 1 < b->end) {
4040 * Not CR,LF but just CR
4048 * Blast - found CR as last char in buffer
4053 * They may not care, defer work as long as
4057 return (nl - b->ptr);
4061 b->ptr++; /* say we have read it as far as
4062 * flush() is concerned */
4063 b->buf++; /* Leave space in front of buffer */
4064 /* Note as we have moved buf up flush's
4066 will naturally make posn point at CR
4068 b->bufsiz--; /* Buffer is thus smaller */
4069 code = PerlIO_fill(f); /* Fetch some more */
4070 b->bufsiz++; /* Restore size for next time */
4071 b->buf--; /* Point at space */
4072 b->ptr = nl = b->buf; /* Which is what we hand
4074 *nl = 0xd; /* Fill in the CR */
4076 goto test; /* fill() call worked */
4078 * CR at EOF - just fall through
4080 /* Should we clear EOF though ??? */
4085 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4091 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4093 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4094 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4100 if (ptr == b->end && *c->nl == 0xd) {
4101 /* Defered CR at end of buffer case - we lied about count */
4113 * Test code - delete when it works ...
4115 IV flags = PerlIOBase(f)->flags;
4116 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4117 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4118 /* Defered CR at end of buffer case - we lied about count */
4124 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4125 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4133 * They have taken what we lied about
4141 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4145 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4147 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4148 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4150 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4151 const STDCHAR *buf = (const STDCHAR *) vbuf;
4152 const STDCHAR *ebuf = buf + count;
4155 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4157 while (buf < ebuf) {
4158 STDCHAR *eptr = b->buf + b->bufsiz;
4159 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4160 while (buf < ebuf && b->ptr < eptr) {
4162 if ((b->ptr + 2) > eptr) {
4170 *(b->ptr)++ = 0xd; /* CR */
4171 *(b->ptr)++ = 0xa; /* LF */
4173 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4183 if (b->ptr >= eptr) {
4189 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4191 return (buf - (STDCHAR *) vbuf);
4196 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4198 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4203 return PerlIOBuf_flush(aTHX_ f);
4207 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4209 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4210 /* In text mode - flush any pending stuff and flip it */
4211 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4212 #ifndef PERLIO_USING_CRLF
4213 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4214 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4215 PerlIO_pop(aTHX_ f);
4222 PerlIO_funcs PerlIO_crlf = {
4223 sizeof(PerlIO_funcs),
4226 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4228 PerlIOBuf_popped, /* popped */
4230 PerlIOCrlf_binmode, /* binmode */
4234 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4236 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4237 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4245 PerlIOBase_clearerr,
4246 PerlIOBase_setlinebuf,
4251 PerlIOCrlf_set_ptrcnt,
4255 /*--------------------------------------------------------------------------------------*/
4257 * mmap as "buffer" layer
4261 PerlIOBuf base; /* PerlIOBuf stuff */
4262 Mmap_t mptr; /* Mapped address */
4263 Size_t len; /* mapped length */
4264 STDCHAR *bbuf; /* malloced buffer if map fails */
4267 static size_t page_size = 0;
4270 PerlIOMmap_map(pTHX_ PerlIO *f)
4272 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4273 IV flags = PerlIOBase(f)->flags;
4277 if (flags & PERLIO_F_CANREAD) {
4278 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4279 int fd = PerlIO_fileno(f);
4281 code = Fstat(fd, &st);
4282 if (code == 0 && S_ISREG(st.st_mode)) {
4283 SSize_t len = st.st_size - b->posn;
4287 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4289 SETERRNO(0, SS_NORMAL);
4290 # ifdef _SC_PAGESIZE
4291 page_size = sysconf(_SC_PAGESIZE);
4293 page_size = sysconf(_SC_PAGE_SIZE);
4295 if ((long) page_size < 0) {
4300 (void) SvUPGRADE(error, SVt_PV);
4301 msg = SvPVx(error, n_a);
4302 Perl_croak(aTHX_ "panic: sysconf: %s",
4307 "panic: sysconf: pagesize unknown");
4311 # ifdef HAS_GETPAGESIZE
4312 page_size = getpagesize();
4314 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4315 page_size = PAGESIZE; /* compiletime, bad */
4319 if ((IV) page_size <= 0)
4320 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4325 * This is a hack - should never happen - open should
4328 b->posn = PerlIO_tell(PerlIONext(f));
4330 posn = (b->posn / page_size) * page_size;
4331 len = st.st_size - posn;
4332 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4333 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4334 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4335 madvise(m->mptr, len, MADV_SEQUENTIAL);
4337 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4338 madvise(m->mptr, len, MADV_WILLNEED);
4340 PerlIOBase(f)->flags =
4341 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4342 b->end = ((STDCHAR *) m->mptr) + len;
4343 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4352 PerlIOBase(f)->flags =
4353 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4355 b->ptr = b->end = b->ptr;
4364 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4366 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4367 PerlIOBuf *b = &m->base;
4371 code = munmap(m->mptr, m->len);
4375 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4378 b->ptr = b->end = b->buf;
4379 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4385 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4387 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4388 PerlIOBuf *b = &m->base;
4389 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4391 * Already have a readbuffer in progress
4397 * We have a write buffer or flushed PerlIOBuf read buffer
4399 m->bbuf = b->buf; /* save it in case we need it again */
4400 b->buf = NULL; /* Clear to trigger below */
4403 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4406 * Map did not work - recover PerlIOBuf buffer if we have one
4411 b->ptr = b->end = b->buf;
4414 return PerlIOBuf_get_base(aTHX_ f);
4418 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4420 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4421 PerlIOBuf *b = &m->base;
4422 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4424 if (b->ptr && (b->ptr - count) >= b->buf
4425 && memEQ(b->ptr - count, vbuf, count)) {
4427 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4432 * Loose the unwritable mapped buffer
4436 * If flush took the "buffer" see if we have one from before
4438 if (!b->buf && m->bbuf)
4441 PerlIOBuf_get_base(aTHX_ f);
4445 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4449 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4451 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4452 PerlIOBuf *b = &m->base;
4453 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4455 * No, or wrong sort of, buffer
4458 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4462 * If unmap took the "buffer" see if we have one from before
4464 if (!b->buf && m->bbuf)
4467 PerlIOBuf_get_base(aTHX_ f);
4471 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4475 PerlIOMmap_flush(pTHX_ PerlIO *f)
4477 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4478 PerlIOBuf *b = &m->base;
4479 IV code = PerlIOBuf_flush(aTHX_ f);
4481 * Now we are "synced" at PerlIOBuf level
4488 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4493 * We seem to have a PerlIOBuf buffer which was not mapped
4494 * remember it in case we need one later
4503 PerlIOMmap_fill(pTHX_ PerlIO *f)
4505 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4506 IV code = PerlIO_flush(f);
4507 if (code == 0 && !b->buf) {
4508 code = PerlIOMmap_map(aTHX_ f);
4510 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4511 code = PerlIOBuf_fill(aTHX_ f);
4517 PerlIOMmap_close(pTHX_ PerlIO *f)
4519 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4520 PerlIOBuf *b = &m->base;
4521 IV code = PerlIO_flush(f);
4525 b->ptr = b->end = b->buf;
4527 if (PerlIOBuf_close(aTHX_ f) != 0)
4533 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4535 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4539 PerlIO_funcs PerlIO_mmap = {
4540 sizeof(PerlIO_funcs),
4543 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4547 PerlIOBase_binmode, /* binmode */
4561 PerlIOBase_clearerr,
4562 PerlIOBase_setlinebuf,
4563 PerlIOMmap_get_base,
4567 PerlIOBuf_set_ptrcnt,
4570 #endif /* HAS_MMAP */
4573 Perl_PerlIO_stdin(pTHX)
4576 PerlIO_stdstreams(aTHX);
4578 return &PL_perlio[1];
4582 Perl_PerlIO_stdout(pTHX)
4585 PerlIO_stdstreams(aTHX);
4587 return &PL_perlio[2];
4591 Perl_PerlIO_stderr(pTHX)
4594 PerlIO_stdstreams(aTHX);
4596 return &PL_perlio[3];
4599 /*--------------------------------------------------------------------------------------*/
4602 PerlIO_getname(PerlIO *f, char *buf)
4607 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4609 name = fgetname(stdio, buf);
4611 Perl_croak(aTHX_ "Don't know how to get file name");
4617 /*--------------------------------------------------------------------------------------*/
4619 * Functions which can be called on any kind of PerlIO implemented in
4623 #undef PerlIO_fdopen
4625 PerlIO_fdopen(int fd, const char *mode)
4628 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4633 PerlIO_open(const char *path, const char *mode)
4636 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4637 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4640 #undef Perlio_reopen
4642 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4645 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4646 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4651 PerlIO_getc(PerlIO *f)
4655 SSize_t count = PerlIO_read(f, buf, 1);
4657 return (unsigned char) buf[0];
4662 #undef PerlIO_ungetc
4664 PerlIO_ungetc(PerlIO *f, int ch)
4669 if (PerlIO_unread(f, &buf, 1) == 1)
4677 PerlIO_putc(PerlIO *f, int ch)
4681 return PerlIO_write(f, &buf, 1);
4686 PerlIO_puts(PerlIO *f, const char *s)
4689 STRLEN len = strlen(s);
4690 return PerlIO_write(f, s, len);
4693 #undef PerlIO_rewind
4695 PerlIO_rewind(PerlIO *f)
4698 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4702 #undef PerlIO_vprintf
4704 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4707 SV *sv = newSVpvn("", 0);
4713 Perl_va_copy(ap, apc);
4714 sv_vcatpvf(sv, fmt, &apc);
4716 sv_vcatpvf(sv, fmt, &ap);
4719 wrote = PerlIO_write(f, s, len);
4724 #undef PerlIO_printf
4726 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4731 result = PerlIO_vprintf(f, fmt, ap);
4736 #undef PerlIO_stdoutf
4738 PerlIO_stdoutf(const char *fmt, ...)
4744 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4749 #undef PerlIO_tmpfile
4751 PerlIO_tmpfile(void)
4757 GV *gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4761 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
4762 newSVpvn("File::Temp", 10), Nullsv, Nullsv, Nullsv);
4763 gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4764 GvIMPORTED_CV_on(gv);
4768 if (gv && GvCV(gv)) {
4774 if (call_sv((SV*)GvCV(gv), G_SCALAR)) {
4775 GV *gv = (GV*)SvRV(newSVsv(*PL_stack_sp--));
4776 IO *io = gv ? GvIO(gv) : 0;
4777 fd = io ? PerlIO_fileno(IoIFP(io)) : -1;
4786 f = PerlIO_fdopen(fd, "w+");
4789 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4790 PerlLIO_unlink(SvPVX(sv));
4801 #endif /* USE_SFIO */
4802 #endif /* PERLIO_IS_STDIO */
4804 /*======================================================================================*/
4806 * Now some functions in terms of above which may be needed even if we are
4807 * not in true PerlIO mode
4811 #undef PerlIO_setpos
4813 PerlIO_setpos(PerlIO *f, SV *pos)
4818 Off_t *posn = (Off_t *) SvPV(pos, len);
4819 if (f && len == sizeof(Off_t))
4820 return PerlIO_seek(f, *posn, SEEK_SET);
4822 SETERRNO(EINVAL, SS_IVCHAN);
4826 #undef PerlIO_setpos
4828 PerlIO_setpos(PerlIO *f, SV *pos)
4833 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4834 if (f && len == sizeof(Fpos_t)) {
4835 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4836 return fsetpos64(f, fpos);
4838 return fsetpos(f, fpos);
4842 SETERRNO(EINVAL, SS_IVCHAN);
4848 #undef PerlIO_getpos
4850 PerlIO_getpos(PerlIO *f, SV *pos)
4853 Off_t posn = PerlIO_tell(f);
4854 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4855 return (posn == (Off_t) - 1) ? -1 : 0;
4858 #undef PerlIO_getpos
4860 PerlIO_getpos(PerlIO *f, SV *pos)
4865 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4866 code = fgetpos64(f, &fpos);
4868 code = fgetpos(f, &fpos);
4870 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
4875 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
4878 vprintf(char *pat, char *args)
4880 _doprnt(pat, args, stdout);
4881 return 0; /* wrong, but perl doesn't use the return
4886 vfprintf(FILE *fd, char *pat, char *args)
4888 _doprnt(pat, args, fd);
4889 return 0; /* wrong, but perl doesn't use the return
4895 #ifndef PerlIO_vsprintf
4897 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
4899 int val = vsprintf(s, fmt, ap);
4901 if (strlen(s) >= (STRLEN) n) {
4903 (void) PerlIO_puts(Perl_error_log,
4904 "panic: sprintf overflow - memory corrupted!\n");
4912 #ifndef PerlIO_sprintf
4914 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
4919 result = PerlIO_vsprintf(s, n, fmt, ap);