2 * perlio.c Copyright (c) 1996-2006, 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.
12 /* This file contains the functions needed to implement PerlIO, which
13 * is Perl's private replacement for the C stdio library. This is used
14 * by default unless you compile with -Uuseperlio or run with
15 * PERLIO=:stdio (but don't do this unless you know what you're doing)
19 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
20 * at the dispatch tables, even when we do not need it for other reasons.
21 * Invent a dSYS macro to abstract this out
23 #ifdef PERL_IMPLICIT_SYS
33 # ifndef USE_CROSS_COMPILE
40 #define PERLIO_NOT_STDIO 0
41 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
47 * This file provides those parts of PerlIO abstraction
48 * which are not #defined in perlio.h.
49 * Which these are depends on various Configure #ifdef's
53 #define PERL_IN_PERLIO_C
56 #ifdef PERL_IMPLICIT_CONTEXT
64 /* Missing proto on LynxOS */
68 /* Call the callback or PerlIOBase, and return failure. */
69 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
70 if (PerlIOValid(f)) { \
71 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
72 if (tab && tab->callback) \
73 return (*tab->callback) args; \
75 return PerlIOBase_ ## base args; \
78 SETERRNO(EBADF, SS_IVCHAN); \
81 /* Call the callback or fail, and return failure. */
82 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
83 if (PerlIOValid(f)) { \
84 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
85 if (tab && tab->callback) \
86 return (*tab->callback) args; \
87 SETERRNO(EINVAL, LIB_INVARG); \
90 SETERRNO(EBADF, SS_IVCHAN); \
93 /* Call the callback or PerlIOBase, and be void. */
94 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
95 if (PerlIOValid(f)) { \
96 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
97 if (tab && tab->callback) \
98 (*tab->callback) args; \
100 PerlIOBase_ ## base args; \
103 SETERRNO(EBADF, SS_IVCHAN)
105 /* Call the callback or fail, and be void. */
106 #define Perl_PerlIO_or_fail_void(f, callback, args) \
107 if (PerlIOValid(f)) { \
108 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
109 if (tab && tab->callback) \
110 (*tab->callback) args; \
112 SETERRNO(EINVAL, LIB_INVARG); \
115 SETERRNO(EBADF, SS_IVCHAN)
117 #if defined(__osf__) && _XOPEN_SOURCE < 500
118 extern int fseeko(FILE *, off_t, int);
119 extern off_t ftello(FILE *);
124 EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
127 perlsio_binmode(FILE *fp, int iotype, int mode)
130 * This used to be contents of do_binmode in doio.c
133 # if defined(atarist) || defined(__MINT__)
136 ((FILE *) fp)->_flag |= _IOBIN;
138 ((FILE *) fp)->_flag &= ~_IOBIN;
145 if (PerlLIO_setmode(fp, mode) != -1) {
147 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
149 # if defined(WIN32) && defined(__BORLANDC__)
151 * The translation mode of the stream is maintained independent
153 * the translation mode of the fd in the Borland RTL (heavy
154 * digging through their runtime sources reveal). User has to
156 * the mode explicitly for the stream (though they don't
158 * this anywhere). GSAR 97-5-24
164 fp->flags &= ~_F_BIN;
172 # if defined(USEMYBINMODE)
174 if (my_binmode(fp, iotype, mode) != FALSE)
180 PERL_UNUSED_ARG(iotype);
181 PERL_UNUSED_ARG(mode);
189 #define O_ACCMODE 3 /* Assume traditional implementation */
193 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
195 const int result = rawmode & O_ACCMODE;
200 ptype = IoTYPE_RDONLY;
203 ptype = IoTYPE_WRONLY;
211 *writing = (result != O_RDONLY);
213 if (result == O_RDONLY) {
217 else if (rawmode & O_APPEND) {
219 if (result != O_WRONLY)
224 if (result == O_WRONLY)
231 if (rawmode & O_BINARY)
237 #ifndef PERLIO_LAYERS
239 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
241 if (!names || !*names
242 || strEQ(names, ":crlf")
243 || strEQ(names, ":raw")
244 || strEQ(names, ":bytes")
248 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
256 PerlIO_destruct(pTHX)
261 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
264 PERL_UNUSED_ARG(iotype);
265 PERL_UNUSED_ARG(mode);
266 PERL_UNUSED_ARG(names);
269 return perlsio_binmode(fp, iotype, mode);
274 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
276 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
279 #ifdef PERL_IMPLICIT_SYS
280 return PerlSIO_fdupopen(f);
283 return win32_fdupopen(f);
286 const int fd = PerlLIO_dup(PerlIO_fileno(f));
290 const int omode = djgpp_get_stream_mode(f);
292 const int omode = fcntl(fd, F_GETFL);
294 PerlIO_intmode2str(omode,mode,NULL);
295 /* the r+ is a hack */
296 return PerlIO_fdopen(fd, mode);
301 SETERRNO(EBADF, SS_IVCHAN);
311 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
315 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
316 int imode, int perm, PerlIO *old, int narg, SV **args)
320 Perl_croak(aTHX_ "More than one argument to open");
322 if (*args == &PL_sv_undef)
323 return PerlIO_tmpfile();
325 const char *name = SvPV_nolen_const(*args);
326 if (*mode == IoTYPE_NUMERIC) {
327 fd = PerlLIO_open3(name, imode, perm);
329 return PerlIO_fdopen(fd, mode + 1);
332 return PerlIO_reopen(name, mode, old);
335 return PerlIO_open(name, mode);
340 return PerlIO_fdopen(fd, (char *) mode);
345 XS(XS_PerlIO__Layer__find)
349 Perl_croak(aTHX_ "Usage class->find(name[,load])");
351 const char * const name = SvPV_nolen_const(ST(1));
352 ST(0) = (strEQ(name, "crlf")
353 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
360 Perl_boot_core_PerlIO(pTHX)
362 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
368 #ifdef PERLIO_IS_STDIO
375 * Does nothing (yet) except force this file to be included in perl
376 * binary. That allows this file to force inclusion of other functions
377 * that may be required by loadable extensions e.g. for
378 * FileHandle::tmpfile
382 #undef PerlIO_tmpfile
389 #else /* PERLIO_IS_STDIO */
397 * This section is just to make sure these functions get pulled in from
401 #undef PerlIO_tmpfile
413 * Force this file to be included in perl binary. Which allows this
414 * file to force inclusion of other functions that may be required by
415 * loadable extensions e.g. for FileHandle::tmpfile
419 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
420 * results in a lot of lseek()s to regular files and lot of small
423 sfset(sfstdout, SF_SHARE, 0);
426 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
428 PerlIO_importFILE(FILE *stdio, const char *mode)
430 const int fd = fileno(stdio);
431 if (!mode || !*mode) {
434 return PerlIO_fdopen(fd, mode);
438 PerlIO_findFILE(PerlIO *pio)
440 const int fd = PerlIO_fileno(pio);
441 FILE * const f = fdopen(fd, "r+");
443 if (!f && errno == EINVAL)
445 if (!f && errno == EINVAL)
452 /*======================================================================================*/
454 * Implement all the PerlIO interface ourselves.
460 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
467 #include <sys/mman.h>
471 PerlIO_debug(const char *fmt, ...)
476 if (!PL_perlio_debug_fd) {
477 if (!PL_tainting && PL_uid == PL_euid && PL_gid == PL_egid) {
478 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
481 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
483 PL_perlio_debug_fd = -1;
485 /* tainting or set*id, so ignore the environment, and ensure we
486 skip these tests next time through. */
487 PL_perlio_debug_fd = -1;
490 if (PL_perlio_debug_fd > 0) {
493 const char * const s = CopFILE(PL_curcop);
494 /* Use fixed buffer as sv_catpvf etc. needs SVs */
496 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
497 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
498 PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
500 const char *s = CopFILE(PL_curcop);
502 SV * const sv = newSVpvs("");
503 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s ? s : "(none)",
504 (IV) CopLINE(PL_curcop));
505 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
507 s = SvPV_const(sv, len);
508 PerlLIO_write(PL_perlio_debug_fd, s, len);
515 /*--------------------------------------------------------------------------------------*/
518 * Inner level routines
522 * Table of pointers to the PerlIO structs (malloc'ed)
524 #define PERLIO_TABLE_SIZE 64
527 PerlIO_allocate(pTHX)
531 * Find a free slot in the table, allocating new table as necessary
536 while ((f = *last)) {
538 last = (PerlIO **) (f);
539 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
545 Newxz(f,PERLIO_TABLE_SIZE,PerlIO);
553 #undef PerlIO_fdupopen
555 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
557 if (PerlIOValid(f)) {
558 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
559 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
561 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
563 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
567 SETERRNO(EBADF, SS_IVCHAN);
573 PerlIO_cleantable(pTHX_ PerlIO **tablep)
575 PerlIO * const table = *tablep;
578 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
579 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
580 PerlIO * const f = table + i;
592 PerlIO_list_alloc(pTHX)
596 Newxz(list, 1, PerlIO_list_t);
602 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
605 if (--list->refcnt == 0) {
608 for (i = 0; i < list->cur; i++) {
609 if (list->array[i].arg)
610 SvREFCNT_dec(list->array[i].arg);
612 Safefree(list->array);
620 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
626 if (list->cur >= list->len) {
629 Renew(list->array, list->len, PerlIO_pair_t);
631 Newx(list->array, list->len, PerlIO_pair_t);
633 p = &(list->array[list->cur++]);
635 if ((p->arg = arg)) {
636 SvREFCNT_inc_simple_void_NN(arg);
641 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
643 PerlIO_list_t *list = NULL;
646 list = PerlIO_list_alloc(aTHX);
647 for (i=0; i < proto->cur; i++) {
648 SV *arg = proto->array[i].arg;
651 arg = sv_dup(arg, param);
653 PERL_UNUSED_ARG(param);
655 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
662 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
665 PerlIO **table = &proto->Iperlio;
668 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
669 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
670 PerlIO_allocate(aTHX); /* root slot is never used */
671 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
672 while ((f = *table)) {
674 table = (PerlIO **) (f++);
675 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
677 (void) fp_dup(f, 0, param);
684 PERL_UNUSED_ARG(proto);
685 PERL_UNUSED_ARG(param);
690 PerlIO_destruct(pTHX)
693 PerlIO **table = &PL_perlio;
696 PerlIO_debug("Destruct %p\n",(void*)aTHX);
698 while ((f = *table)) {
700 table = (PerlIO **) (f++);
701 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
705 if (l->tab->kind & PERLIO_K_DESTRUCT) {
706 PerlIO_debug("Destruct popping %s\n", l->tab->name);
720 PerlIO_pop(pTHX_ PerlIO *f)
722 const PerlIOl *l = *f;
724 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
725 if (l->tab->Popped) {
727 * If popped returns non-zero do not free its layer structure
728 * it has either done so itself, or it is shared and still in
731 if ((*l->tab->Popped) (aTHX_ f) != 0)
739 /* Return as an array the stack of layers on a filehandle. Note that
740 * the stack is returned top-first in the array, and there are three
741 * times as many array elements as there are layers in the stack: the
742 * first element of a layer triplet is the name, the second one is the
743 * arguments, and the third one is the flags. */
746 PerlIO_get_layers(pTHX_ PerlIO *f)
749 AV * const av = newAV();
751 if (PerlIOValid(f)) {
752 PerlIOl *l = PerlIOBase(f);
755 SV * const name = l->tab && l->tab->name ?
756 newSVpv(l->tab->name, 0) : &PL_sv_undef;
757 SV * const arg = l->tab && l->tab->Getarg ?
758 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
761 av_push(av, newSViv((IV)l->flags));
769 /*--------------------------------------------------------------------------------------*/
771 * XS Interface for perl code
775 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
779 if ((SSize_t) len <= 0)
781 for (i = 0; i < PL_known_layers->cur; i++) {
782 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
783 if (memEQ(f->name, name, len) && f->name[len] == 0) {
784 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
788 if (load && PL_subname && PL_def_layerlist
789 && PL_def_layerlist->cur >= 2) {
790 if (PL_in_load_module) {
791 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
794 SV * const pkgsv = newSVpvs("PerlIO");
795 SV * const layer = newSVpvn(name, len);
796 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
798 SAVEINT(PL_in_load_module);
800 SAVEGENERICSV(PL_warnhook);
801 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
805 * The two SVs are magically freed by load_module
807 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
810 return PerlIO_find_layer(aTHX_ name, len, 0);
813 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
817 #ifdef USE_ATTRIBUTES_FOR_PERLIO
820 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
823 IO * const io = GvIOn((GV *) SvRV(sv));
824 PerlIO * const ifp = IoIFP(io);
825 PerlIO * const ofp = IoOFP(io);
826 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
827 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
833 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
836 IO * const io = GvIOn((GV *) SvRV(sv));
837 PerlIO * const ifp = IoIFP(io);
838 PerlIO * const ofp = IoOFP(io);
839 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
840 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
846 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
848 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
853 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
855 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
859 MGVTBL perlio_vtab = {
867 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
870 SV * const sv = SvRV(ST(1));
871 AV * const av = newAV();
875 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
877 mg = mg_find(sv, PERL_MAGIC_ext);
878 mg->mg_virtual = &perlio_vtab;
880 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
881 for (i = 2; i < items; i++) {
883 const char * const name = SvPV_const(ST(i), len);
884 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
886 av_push(av, SvREFCNT_inc_simple_NN(layer));
897 #endif /* USE_ATTIBUTES_FOR_PERLIO */
900 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
902 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
903 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
907 XS(XS_PerlIO__Layer__NoWarnings)
909 /* This is used as a %SIG{__WARN__} handler to supress warnings
910 during loading of layers.
915 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
919 XS(XS_PerlIO__Layer__find)
924 Perl_croak(aTHX_ "Usage class->find(name[,load])");
927 const char * const name = SvPV_const(ST(1), len);
928 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
929 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
931 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
938 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
941 if (!PL_known_layers)
942 PL_known_layers = PerlIO_list_alloc(aTHX);
943 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
944 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
948 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
952 const char *s = names;
954 while (isSPACE(*s) || *s == ':')
959 const char *as = NULL;
961 if (!isIDFIRST(*s)) {
963 * Message is consistent with how attribute lists are
964 * passed. Even though this means "foo : : bar" is
965 * seen as an invalid separator character.
967 const char q = ((*s == '\'') ? '"' : '\'');
968 if (ckWARN(WARN_LAYER))
969 Perl_warner(aTHX_ packWARN(WARN_LAYER),
970 "Invalid separator character %c%c%c in PerlIO layer specification %s",
972 SETERRNO(EINVAL, LIB_INVARG);
977 } while (isALNUM(*e));
993 * It's a nul terminated string, not allowed
994 * to \ the terminating null. Anything other
995 * character is passed over.
1005 if (ckWARN(WARN_LAYER))
1006 Perl_warner(aTHX_ packWARN(WARN_LAYER),
1007 "Argument list not closed for PerlIO layer \"%.*s\"",
1019 PerlIO_funcs * const layer =
1020 PerlIO_find_layer(aTHX_ s, llen, 1);
1024 arg = newSVpvn(as, alen);
1025 PerlIO_list_push(aTHX_ av, layer,
1026 (arg) ? arg : &PL_sv_undef);
1031 if (ckWARN(WARN_LAYER))
1032 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1045 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1048 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1049 #ifdef PERLIO_USING_CRLF
1052 if (PerlIO_stdio.Set_ptrcnt)
1053 tab = &PerlIO_stdio;
1055 PerlIO_debug("Pushing %s\n", tab->name);
1056 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1061 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1063 return av->array[n].arg;
1067 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1069 if (n >= 0 && n < av->cur) {
1070 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1071 av->array[n].funcs->name);
1072 return av->array[n].funcs;
1075 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1080 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1082 PERL_UNUSED_ARG(mode);
1083 PERL_UNUSED_ARG(arg);
1084 PERL_UNUSED_ARG(tab);
1085 if (PerlIOValid(f)) {
1087 PerlIO_pop(aTHX_ f);
1093 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1094 sizeof(PerlIO_funcs),
1097 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1117 NULL, /* get_base */
1118 NULL, /* get_bufsiz */
1121 NULL, /* set_ptrcnt */
1125 PerlIO_default_layers(pTHX)
1128 if (!PL_def_layerlist) {
1129 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1130 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1131 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1132 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1134 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1136 osLayer = &PerlIO_win32;
1139 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1140 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1141 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1142 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1144 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1146 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1147 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1148 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1149 PerlIO_list_push(aTHX_ PL_def_layerlist,
1150 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1153 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1156 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1159 if (PL_def_layerlist->cur < 2) {
1160 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1162 return PL_def_layerlist;
1166 Perl_boot_core_PerlIO(pTHX)
1168 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1169 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1172 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1173 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1177 PerlIO_default_layer(pTHX_ I32 n)
1180 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1183 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1186 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1187 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1190 PerlIO_stdstreams(pTHX)
1194 PerlIO_allocate(aTHX);
1195 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1196 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1197 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1202 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1204 if (tab->fsize != sizeof(PerlIO_funcs)) {
1206 Perl_croak(aTHX_ "Layer does not match this perl");
1210 if (tab->size < sizeof(PerlIOl)) {
1213 /* Real layer with a data area */
1216 Newxz(temp, tab->size, char);
1220 l->tab = (PerlIO_funcs*) tab;
1222 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1223 (void*)f, tab->name,
1224 (mode) ? mode : "(Null)", (void*)arg);
1225 if (*l->tab->Pushed &&
1227 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1228 PerlIO_pop(aTHX_ f);
1237 /* Pseudo-layer where push does its own stack adjust */
1238 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1239 (mode) ? mode : "(Null)", (void*)arg);
1241 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1249 PerlIOBase_binmode(pTHX_ PerlIO *f)
1251 if (PerlIOValid(f)) {
1252 /* Is layer suitable for raw stream ? */
1253 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1254 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1255 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1258 /* Not suitable - pop it */
1259 PerlIO_pop(aTHX_ f);
1267 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1269 PERL_UNUSED_ARG(mode);
1270 PERL_UNUSED_ARG(arg);
1271 PERL_UNUSED_ARG(tab);
1273 if (PerlIOValid(f)) {
1278 * Strip all layers that are not suitable for a raw stream
1281 while (t && (l = *t)) {
1282 if (l->tab->Binmode) {
1283 /* Has a handler - normal case */
1284 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1286 /* Layer still there - move down a layer */
1295 /* No handler - pop it */
1296 PerlIO_pop(aTHX_ t);
1299 if (PerlIOValid(f)) {
1300 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1308 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1309 PerlIO_list_t *layers, IV n, IV max)
1313 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1315 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1326 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1330 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1331 code = PerlIO_parse_layers(aTHX_ layers, names);
1333 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1335 PerlIO_list_free(aTHX_ layers);
1341 /*--------------------------------------------------------------------------------------*/
1343 * Given the abstraction above the public API functions
1347 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1349 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1350 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1351 iotype, mode, (names) ? names : "(Null)");
1354 /* Do not flush etc. if (e.g.) switching encodings.
1355 if a pushed layer knows it needs to flush lower layers
1356 (for example :unix which is never going to call them)
1357 it can do the flush when it is pushed.
1359 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1362 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1363 #ifdef PERLIO_USING_CRLF
1364 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1365 O_BINARY so we can look for it in mode.
1367 if (!(mode & O_BINARY)) {
1369 /* FIXME?: Looking down the layer stack seems wrong,
1370 but is a way of reaching past (say) an encoding layer
1371 to flip CRLF-ness of the layer(s) below
1374 /* Perhaps we should turn on bottom-most aware layer
1375 e.g. Ilya's idea that UNIX TTY could serve
1377 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1378 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1379 /* Not in text mode - flush any pending stuff and flip it */
1381 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1383 /* Only need to turn it on in one layer so we are done */
1388 /* Not finding a CRLF aware layer presumably means we are binary
1389 which is not what was requested - so we failed
1390 We _could_ push :crlf layer but so could caller
1395 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1396 So code that used to be here is now in PerlIORaw_pushed().
1398 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1403 PerlIO__close(pTHX_ PerlIO *f)
1405 if (PerlIOValid(f)) {
1406 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1407 if (tab && tab->Close)
1408 return (*tab->Close)(aTHX_ f);
1410 return PerlIOBase_close(aTHX_ f);
1413 SETERRNO(EBADF, SS_IVCHAN);
1419 Perl_PerlIO_close(pTHX_ PerlIO *f)
1421 const int code = PerlIO__close(aTHX_ f);
1422 while (PerlIOValid(f)) {
1423 PerlIO_pop(aTHX_ f);
1429 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1432 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1436 static PerlIO_funcs *
1437 PerlIO_layer_from_ref(pTHX_ SV *sv)
1441 * For any scalar type load the handler which is bundled with perl
1443 if (SvTYPE(sv) < SVt_PVAV) {
1444 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1445 /* This isn't supposed to happen, since PerlIO::scalar is core,
1446 * but could happen anyway in smaller installs or with PAR */
1447 if (!f && ckWARN(WARN_LAYER))
1448 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1453 * For other types allow if layer is known but don't try and load it
1455 switch (SvTYPE(sv)) {
1457 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1459 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1461 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1463 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1470 PerlIO_resolve_layers(pTHX_ const char *layers,
1471 const char *mode, int narg, SV **args)
1474 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1477 PerlIO_stdstreams(aTHX);
1479 SV * const arg = *args;
1481 * If it is a reference but not an object see if we have a handler
1484 if (SvROK(arg) && !sv_isobject(arg)) {
1485 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1487 def = PerlIO_list_alloc(aTHX);
1488 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1492 * Don't fail if handler cannot be found :via(...) etc. may do
1493 * something sensible else we will just stringfy and open
1498 if (!layers || !*layers)
1499 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1500 if (layers && *layers) {
1503 av = PerlIO_clone_list(aTHX_ def, NULL);
1508 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1512 PerlIO_list_free(aTHX_ av);
1524 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1525 int imode, int perm, PerlIO *f, int narg, SV **args)
1528 if (!f && narg == 1 && *args == &PL_sv_undef) {
1529 if ((f = PerlIO_tmpfile())) {
1530 if (!layers || !*layers)
1531 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1532 if (layers && *layers)
1533 PerlIO_apply_layers(aTHX_ f, mode, layers);
1537 PerlIO_list_t *layera;
1539 PerlIO_funcs *tab = NULL;
1540 if (PerlIOValid(f)) {
1542 * This is "reopen" - it is not tested as perl does not use it
1546 layera = PerlIO_list_alloc(aTHX);
1550 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1551 PerlIO_list_push(aTHX_ layera, l->tab,
1552 (arg) ? arg : &PL_sv_undef);
1555 l = *PerlIONext(&l);
1559 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1565 * Start at "top" of layer stack
1567 n = layera->cur - 1;
1569 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1578 * Found that layer 'n' can do opens - call it
1580 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1581 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1583 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1584 tab->name, layers ? layers : "(Null)", mode, fd,
1585 imode, perm, (void*)f, narg, (void*)args);
1587 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1590 SETERRNO(EINVAL, LIB_INVARG);
1594 if (n + 1 < layera->cur) {
1596 * More layers above the one that we used to open -
1599 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1600 /* If pushing layers fails close the file */
1607 PerlIO_list_free(aTHX_ layera);
1614 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1616 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1620 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1622 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1626 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1628 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1632 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1634 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1638 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1640 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1644 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1649 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1651 if (tab && tab->Flush)
1652 return (*tab->Flush) (aTHX_ f);
1654 return 0; /* If no Flush defined, silently succeed. */
1657 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1658 SETERRNO(EBADF, SS_IVCHAN);
1664 * Is it good API design to do flush-all on NULL, a potentially
1665 * errorneous input? Maybe some magical value (PerlIO*
1666 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1667 * things on fflush(NULL), but should we be bound by their design
1670 PerlIO **table = &PL_perlio;
1672 while ((f = *table)) {
1674 table = (PerlIO **) (f++);
1675 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1676 if (*f && PerlIO_flush(f) != 0)
1686 PerlIOBase_flush_linebuf(pTHX)
1689 PerlIO **table = &PL_perlio;
1691 while ((f = *table)) {
1693 table = (PerlIO **) (f++);
1694 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1697 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1698 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1706 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1712 PerlIO_isutf8(PerlIO *f)
1715 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1717 SETERRNO(EBADF, SS_IVCHAN);
1723 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1725 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1729 Perl_PerlIO_error(pTHX_ PerlIO *f)
1731 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1735 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1737 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1741 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1743 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1747 PerlIO_has_base(PerlIO *f)
1749 if (PerlIOValid(f)) {
1750 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1753 return (tab->Get_base != NULL);
1754 SETERRNO(EINVAL, LIB_INVARG);
1757 SETERRNO(EBADF, SS_IVCHAN);
1763 PerlIO_fast_gets(PerlIO *f)
1765 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1766 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1769 return (tab->Set_ptrcnt != NULL);
1770 SETERRNO(EINVAL, LIB_INVARG);
1773 SETERRNO(EBADF, SS_IVCHAN);
1779 PerlIO_has_cntptr(PerlIO *f)
1781 if (PerlIOValid(f)) {
1782 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1785 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1786 SETERRNO(EINVAL, LIB_INVARG);
1789 SETERRNO(EBADF, SS_IVCHAN);
1795 PerlIO_canset_cnt(PerlIO *f)
1797 if (PerlIOValid(f)) {
1798 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1801 return (tab->Set_ptrcnt != NULL);
1802 SETERRNO(EINVAL, LIB_INVARG);
1805 SETERRNO(EBADF, SS_IVCHAN);
1811 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1813 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1817 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1819 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1823 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1825 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1829 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1831 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1835 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1837 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1841 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1843 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1847 /*--------------------------------------------------------------------------------------*/
1849 * utf8 and raw dummy layers
1853 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1855 PERL_UNUSED_CONTEXT;
1856 PERL_UNUSED_ARG(mode);
1857 PERL_UNUSED_ARG(arg);
1858 if (PerlIOValid(f)) {
1859 if (tab->kind & PERLIO_K_UTF8)
1860 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1862 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1868 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1869 sizeof(PerlIO_funcs),
1872 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1892 NULL, /* get_base */
1893 NULL, /* get_bufsiz */
1896 NULL, /* set_ptrcnt */
1899 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1900 sizeof(PerlIO_funcs),
1923 NULL, /* get_base */
1924 NULL, /* get_bufsiz */
1927 NULL, /* set_ptrcnt */
1931 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1932 IV n, const char *mode, int fd, int imode, int perm,
1933 PerlIO *old, int narg, SV **args)
1935 PerlIO_funcs * const tab = PerlIO_default_btm();
1936 PERL_UNUSED_ARG(self);
1937 if (tab && tab->Open)
1938 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1940 SETERRNO(EINVAL, LIB_INVARG);
1944 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1945 sizeof(PerlIO_funcs),
1968 NULL, /* get_base */
1969 NULL, /* get_bufsiz */
1972 NULL, /* set_ptrcnt */
1974 /*--------------------------------------------------------------------------------------*/
1975 /*--------------------------------------------------------------------------------------*/
1977 * "Methods" of the "base class"
1981 PerlIOBase_fileno(pTHX_ PerlIO *f)
1983 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1987 PerlIO_modestr(PerlIO * f, char *buf)
1990 if (PerlIOValid(f)) {
1991 const IV flags = PerlIOBase(f)->flags;
1992 if (flags & PERLIO_F_APPEND) {
1994 if (flags & PERLIO_F_CANREAD) {
1998 else if (flags & PERLIO_F_CANREAD) {
2000 if (flags & PERLIO_F_CANWRITE)
2003 else if (flags & PERLIO_F_CANWRITE) {
2005 if (flags & PERLIO_F_CANREAD) {
2009 #ifdef PERLIO_USING_CRLF
2010 if (!(flags & PERLIO_F_CRLF))
2020 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2022 PerlIOl * const l = PerlIOBase(f);
2023 PERL_UNUSED_CONTEXT;
2024 PERL_UNUSED_ARG(arg);
2026 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2027 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2028 if (tab->Set_ptrcnt != NULL)
2029 l->flags |= PERLIO_F_FASTGETS;
2031 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2035 l->flags |= PERLIO_F_CANREAD;
2038 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2041 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2044 SETERRNO(EINVAL, LIB_INVARG);
2050 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2053 l->flags &= ~PERLIO_F_CRLF;
2056 l->flags |= PERLIO_F_CRLF;
2059 SETERRNO(EINVAL, LIB_INVARG);
2066 l->flags |= l->next->flags &
2067 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2072 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2073 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2074 l->flags, PerlIO_modestr(f, temp));
2080 PerlIOBase_popped(pTHX_ PerlIO *f)
2082 PERL_UNUSED_CONTEXT;
2088 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2091 * Save the position as current head considers it
2093 const Off_t old = PerlIO_tell(f);
2094 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2095 PerlIOSelf(f, PerlIOBuf)->posn = old;
2096 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2100 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2102 STDCHAR *buf = (STDCHAR *) vbuf;
2104 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2105 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2106 SETERRNO(EBADF, SS_IVCHAN);
2112 SSize_t avail = PerlIO_get_cnt(f);
2115 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2117 STDCHAR *ptr = PerlIO_get_ptr(f);
2118 Copy(ptr, buf, take, STDCHAR);
2119 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2122 if (avail == 0) /* set_ptrcnt could have reset avail */
2125 if (count > 0 && avail <= 0) {
2126 if (PerlIO_fill(f) != 0)
2131 return (buf - (STDCHAR *) vbuf);
2137 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2139 PERL_UNUSED_CONTEXT;
2145 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2147 PERL_UNUSED_CONTEXT;
2153 PerlIOBase_close(pTHX_ PerlIO *f)
2156 if (PerlIOValid(f)) {
2157 PerlIO *n = PerlIONext(f);
2158 code = PerlIO_flush(f);
2159 PerlIOBase(f)->flags &=
2160 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2161 while (PerlIOValid(n)) {
2162 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2163 if (tab && tab->Close) {
2164 if ((*tab->Close)(aTHX_ n) != 0)
2169 PerlIOBase(n)->flags &=
2170 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2176 SETERRNO(EBADF, SS_IVCHAN);
2182 PerlIOBase_eof(pTHX_ PerlIO *f)
2184 PERL_UNUSED_CONTEXT;
2185 if (PerlIOValid(f)) {
2186 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2192 PerlIOBase_error(pTHX_ PerlIO *f)
2194 PERL_UNUSED_CONTEXT;
2195 if (PerlIOValid(f)) {
2196 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2202 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2204 if (PerlIOValid(f)) {
2205 PerlIO * const n = PerlIONext(f);
2206 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2213 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2215 PERL_UNUSED_CONTEXT;
2216 if (PerlIOValid(f)) {
2217 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2222 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2228 arg = sv_dup(arg, param);
2229 SvREFCNT_inc_simple_void_NN(arg);
2233 return newSVsv(arg);
2236 PERL_UNUSED_ARG(param);
2237 return newSVsv(arg);
2242 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2244 PerlIO * const nexto = PerlIONext(o);
2245 if (PerlIOValid(nexto)) {
2246 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2247 if (tab && tab->Dup)
2248 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2250 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2253 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2256 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2257 self->name, (void*)f, (void*)o, (void*)param);
2259 arg = (*self->Getarg)(aTHX_ o, param, flags);
2260 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2267 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2269 /* Must be called with PL_perlio_mutex locked. */
2271 S_more_refcounted_fds(pTHX_ const int new_fd) {
2273 const int old_max = PL_perlio_fd_refcnt_size;
2274 const int new_max = 16 + (new_fd & ~15);
2277 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2278 old_max, new_fd, new_max);
2280 if (new_fd < old_max) {
2284 assert (new_max > new_fd);
2286 /* Use plain realloc() since we need this memory to be really
2287 * global and visible to all the interpreters and/or threads. */
2288 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2292 MUTEX_UNLOCK(&PL_perlio_mutex);
2294 /* Can't use PerlIO to write as it allocates memory */
2295 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2296 PL_no_mem, strlen(PL_no_mem));
2300 PL_perlio_fd_refcnt_size = new_max;
2301 PL_perlio_fd_refcnt = new_array;
2303 PerlIO_debug("Zeroing %p, %d\n",
2304 (void*)(new_array + old_max),
2307 Zero(new_array + old_max, new_max - old_max, int);
2314 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2315 PERL_UNUSED_CONTEXT;
2319 PerlIOUnix_refcnt_inc(int fd)
2326 MUTEX_LOCK(&PL_perlio_mutex);
2328 if (fd >= PL_perlio_fd_refcnt_size)
2329 S_more_refcounted_fds(aTHX_ fd);
2331 PL_perlio_fd_refcnt[fd]++;
2332 if (PL_perlio_fd_refcnt[fd] <= 0) {
2333 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2334 fd, PL_perlio_fd_refcnt[fd]);
2336 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2337 fd, PL_perlio_fd_refcnt[fd]);
2340 MUTEX_UNLOCK(&PL_perlio_mutex);
2343 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2348 PerlIOUnix_refcnt_dec(int fd)
2355 MUTEX_LOCK(&PL_perlio_mutex);
2357 if (fd >= PL_perlio_fd_refcnt_size) {
2358 Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
2359 fd, PL_perlio_fd_refcnt_size);
2361 if (PL_perlio_fd_refcnt[fd] <= 0) {
2362 Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
2363 fd, PL_perlio_fd_refcnt[fd]);
2365 cnt = --PL_perlio_fd_refcnt[fd];
2366 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2368 MUTEX_UNLOCK(&PL_perlio_mutex);
2371 Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
2377 PerlIO_cleanup(pTHX)
2382 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2384 PerlIO_debug("Cleanup layers\n");
2387 /* Raise STDIN..STDERR refcount so we don't close them */
2388 for (i=0; i < 3; i++)
2389 PerlIOUnix_refcnt_inc(i);
2390 PerlIO_cleantable(aTHX_ &PL_perlio);
2391 /* Restore STDIN..STDERR refcount */
2392 for (i=0; i < 3; i++)
2393 PerlIOUnix_refcnt_dec(i);
2395 if (PL_known_layers) {
2396 PerlIO_list_free(aTHX_ PL_known_layers);
2397 PL_known_layers = NULL;
2399 if (PL_def_layerlist) {
2400 PerlIO_list_free(aTHX_ PL_def_layerlist);
2401 PL_def_layerlist = NULL;
2405 void PerlIO_teardown(pTHX) /* Call only from PERL_SYS_TERM(). */
2410 /* By now all filehandles should have been closed, so any
2411 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2414 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2415 if (PL_perlio_fd_refcnt[i])
2416 PerlIO_debug("PerlIO_cleanup: fd %d refcnt=%d\n",
2417 i, PL_perlio_fd_refcnt[i]);
2421 /* Not bothering with PL_perlio_mutex since by now
2422 * all the interpreters are gone. */
2423 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2424 && PL_perlio_fd_refcnt) {
2425 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2426 PL_perlio_fd_refcnt = NULL;
2427 PL_perlio_fd_refcnt_size = 0;
2431 /*--------------------------------------------------------------------------------------*/
2433 * Bottom-most level for UNIX-like case
2437 struct _PerlIO base; /* The generic part */
2438 int fd; /* UNIX like file descriptor */
2439 int oflags; /* open/fcntl flags */
2443 PerlIOUnix_oflags(const char *mode)
2446 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2451 if (*++mode == '+') {
2458 oflags = O_CREAT | O_TRUNC;
2459 if (*++mode == '+') {
2468 oflags = O_CREAT | O_APPEND;
2469 if (*++mode == '+') {
2482 else if (*mode == 't') {
2484 oflags &= ~O_BINARY;
2488 * Always open in binary mode
2491 if (*mode || oflags == -1) {
2492 SETERRNO(EINVAL, LIB_INVARG);
2499 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2501 PERL_UNUSED_CONTEXT;
2502 return PerlIOSelf(f, PerlIOUnix)->fd;
2506 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2508 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2511 if (PerlLIO_fstat(fd, &st) == 0) {
2512 if (!S_ISREG(st.st_mode)) {
2513 PerlIO_debug("%d is not regular file\n",fd);
2514 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2517 PerlIO_debug("%d _is_ a regular file\n",fd);
2523 PerlIOUnix_refcnt_inc(fd);
2524 PERL_UNUSED_CONTEXT;
2528 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2530 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2531 if (*PerlIONext(f)) {
2532 /* We never call down so do any pending stuff now */
2533 PerlIO_flush(PerlIONext(f));
2535 * XXX could (or should) we retrieve the oflags from the open file
2536 * handle rather than believing the "mode" we are passed in? XXX
2537 * Should the value on NULL mode be 0 or -1?
2539 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2540 mode ? PerlIOUnix_oflags(mode) : -1);
2542 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2548 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2550 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2552 PERL_UNUSED_CONTEXT;
2553 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2555 SETERRNO(ESPIPE, LIB_INVARG);
2557 SETERRNO(EINVAL, LIB_INVARG);
2561 new_loc = PerlLIO_lseek(fd, offset, whence);
2562 if (new_loc == (Off_t) - 1)
2564 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2569 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2570 IV n, const char *mode, int fd, int imode,
2571 int perm, PerlIO *f, int narg, SV **args)
2573 if (PerlIOValid(f)) {
2574 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2575 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2578 if (*mode == IoTYPE_NUMERIC)
2581 imode = PerlIOUnix_oflags(mode);
2585 const char *path = SvPV_nolen_const(*args);
2586 fd = PerlLIO_open3(path, imode, perm);
2590 if (*mode == IoTYPE_IMPLICIT)
2593 f = PerlIO_allocate(aTHX);
2595 if (!PerlIOValid(f)) {
2596 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2600 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2601 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2602 if (*mode == IoTYPE_APPEND)
2603 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2610 * FIXME: pop layers ???
2618 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2620 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2622 if (flags & PERLIO_DUP_FD) {
2623 fd = PerlLIO_dup(fd);
2626 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2628 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2629 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2638 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2641 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2642 #ifdef PERLIO_STD_SPECIAL
2644 return PERLIO_STD_IN(fd, vbuf, count);
2646 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2647 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2651 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2652 if (len >= 0 || errno != EINTR) {
2654 if (errno != EAGAIN) {
2655 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2658 else if (len == 0 && count != 0) {
2659 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2670 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2673 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2674 #ifdef PERLIO_STD_SPECIAL
2675 if (fd == 1 || fd == 2)
2676 return PERLIO_STD_OUT(fd, vbuf, count);
2679 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2680 if (len >= 0 || errno != EINTR) {
2682 if (errno != EAGAIN) {
2683 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2694 PerlIOUnix_tell(pTHX_ PerlIO *f)
2696 PERL_UNUSED_CONTEXT;
2698 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2703 PerlIOUnix_close(pTHX_ PerlIO *f)
2706 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2708 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2709 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2710 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2715 SETERRNO(EBADF,SS_IVCHAN);
2718 while (PerlLIO_close(fd) != 0) {
2719 if (errno != EINTR) {
2726 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2731 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2732 sizeof(PerlIO_funcs),
2739 PerlIOBase_binmode, /* binmode */
2749 PerlIOBase_noop_ok, /* flush */
2750 PerlIOBase_noop_fail, /* fill */
2753 PerlIOBase_clearerr,
2754 PerlIOBase_setlinebuf,
2755 NULL, /* get_base */
2756 NULL, /* get_bufsiz */
2759 NULL, /* set_ptrcnt */
2762 /*--------------------------------------------------------------------------------------*/
2767 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2768 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2769 broken by the last second glibc 2.3 fix
2771 #define STDIO_BUFFER_WRITABLE
2776 struct _PerlIO base;
2777 FILE *stdio; /* The stream */
2781 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2783 PERL_UNUSED_CONTEXT;
2785 if (PerlIOValid(f)) {
2786 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2788 return PerlSIO_fileno(s);
2795 PerlIOStdio_mode(const char *mode, char *tmode)
2797 char * const ret = tmode;
2803 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2811 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2814 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2815 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2816 if (toptab == tab) {
2817 /* Top is already stdio - pop self (duplicate) and use original */
2818 PerlIO_pop(aTHX_ f);
2821 const int fd = PerlIO_fileno(n);
2824 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2825 mode = PerlIOStdio_mode(mode, tmode)))) {
2826 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2827 /* We never call down so do any pending stuff now */
2828 PerlIO_flush(PerlIONext(f));
2835 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2840 PerlIO_importFILE(FILE *stdio, const char *mode)
2846 if (!mode || !*mode) {
2847 /* We need to probe to see how we can open the stream
2848 so start with read/write and then try write and read
2849 we dup() so that we can fclose without loosing the fd.
2851 Note that the errno value set by a failing fdopen
2852 varies between stdio implementations.
2854 const int fd = PerlLIO_dup(fileno(stdio));
2855 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2857 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2860 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2863 /* Don't seem to be able to open */
2869 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2870 s = PerlIOSelf(f, PerlIOStdio);
2878 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2879 IV n, const char *mode, int fd, int imode,
2880 int perm, PerlIO *f, int narg, SV **args)
2883 if (PerlIOValid(f)) {
2884 const char * const path = SvPV_nolen_const(*args);
2885 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2887 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2888 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2893 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2898 const char * const path = SvPV_nolen_const(*args);
2899 if (*mode == IoTYPE_NUMERIC) {
2901 fd = PerlLIO_open3(path, imode, perm);
2905 bool appended = FALSE;
2907 /* Cygwin wants its 'b' early. */
2909 mode = PerlIOStdio_mode(mode, tmode);
2911 stdio = PerlSIO_fopen(path, mode);
2914 f = PerlIO_allocate(aTHX);
2917 mode = PerlIOStdio_mode(mode, tmode);
2918 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2920 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2921 PerlIOUnix_refcnt_inc(fileno(stdio));
2923 PerlSIO_fclose(stdio);
2935 if (*mode == IoTYPE_IMPLICIT) {
2942 stdio = PerlSIO_stdin;
2945 stdio = PerlSIO_stdout;
2948 stdio = PerlSIO_stderr;
2953 stdio = PerlSIO_fdopen(fd, mode =
2954 PerlIOStdio_mode(mode, tmode));
2958 f = PerlIO_allocate(aTHX);
2960 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2961 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2962 PerlIOUnix_refcnt_inc(fileno(stdio));
2972 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2974 /* This assumes no layers underneath - which is what
2975 happens, but is not how I remember it. NI-S 2001/10/16
2977 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2978 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2979 const int fd = fileno(stdio);
2981 if (flags & PERLIO_DUP_FD) {
2982 const int dfd = PerlLIO_dup(fileno(stdio));
2984 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2989 /* FIXME: To avoid messy error recovery if dup fails
2990 re-use the existing stdio as though flag was not set
2994 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2996 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2997 PerlIOUnix_refcnt_inc(fileno(stdio));
3003 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3005 PERL_UNUSED_CONTEXT;
3007 /* XXX this could use PerlIO_canset_fileno() and
3008 * PerlIO_set_fileno() support from Configure
3010 # if defined(__UCLIBC__)
3011 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3014 # elif defined(__GLIBC__)
3015 /* There may be a better way for GLIBC:
3016 - libio.h defines a flag to not close() on cleanup
3020 # elif defined(__sun__)
3023 # elif defined(__hpux)
3027 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3028 your platform does not have special entry try this one.
3029 [For OSF only have confirmation for Tru64 (alpha)
3030 but assume other OSFs will be similar.]
3032 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3035 # elif defined(__FreeBSD__)
3036 /* There may be a better way on FreeBSD:
3037 - we could insert a dummy func in the _close function entry
3038 f->_close = (int (*)(void *)) dummy_close;
3042 # elif defined(__OpenBSD__)
3043 /* There may be a better way on OpenBSD:
3044 - we could insert a dummy func in the _close function entry
3045 f->_close = (int (*)(void *)) dummy_close;
3049 # elif defined(__EMX__)
3050 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3053 # elif defined(__CYGWIN__)
3054 /* There may be a better way on CYGWIN:
3055 - we could insert a dummy func in the _close function entry
3056 f->_close = (int (*)(void *)) dummy_close;
3060 # elif defined(WIN32)
3061 # if defined(__BORLANDC__)
3062 f->fd = PerlLIO_dup(fileno(f));
3063 # elif defined(UNDER_CE)
3064 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3073 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3074 (which isn't thread safe) instead
3076 # error "Don't know how to set FILE.fileno on your platform"
3084 PerlIOStdio_close(pTHX_ PerlIO *f)
3086 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3092 const int fd = fileno(stdio);
3097 #ifdef SOCKS5_VERSION_NAME
3098 /* Socks lib overrides close() but stdio isn't linked to
3099 that library (though we are) - so we must call close()
3100 on sockets on stdio's behalf.
3103 Sock_size_t optlen = sizeof(int);
3104 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3107 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3110 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3111 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3113 if (stdio == stdout || stdio == stderr)
3114 return PerlIO_flush(f);
3115 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3116 Use Sarathy's trick from maint-5.6 to invalidate the
3117 fileno slot of the FILE *
3119 result = PerlIO_flush(f);
3121 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3123 dupfd = PerlLIO_dup(fd);
3125 result = PerlSIO_fclose(stdio);
3126 /* We treat error from stdio as success if we invalidated
3127 errno may NOT be expected EBADF
3129 if (invalidate && result != 0) {
3133 #ifdef SOCKS5_VERSION_NAME
3134 /* in SOCKS' case, let close() determine return value */
3138 PerlLIO_dup2(dupfd,fd);
3139 PerlLIO_close(dupfd);
3146 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3149 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3153 STDCHAR *buf = (STDCHAR *) vbuf;
3155 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3156 * stdio does not do that for fread()
3158 const int ch = PerlSIO_fgetc(s);
3165 got = PerlSIO_fread(vbuf, 1, count, s);
3166 if (got == 0 && PerlSIO_ferror(s))
3168 if (got >= 0 || errno != EINTR)
3171 SETERRNO(0,0); /* just in case */
3177 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3180 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3182 #ifdef STDIO_BUFFER_WRITABLE
3183 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3184 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3185 STDCHAR *base = PerlIO_get_base(f);
3186 SSize_t cnt = PerlIO_get_cnt(f);
3187 STDCHAR *ptr = PerlIO_get_ptr(f);
3188 SSize_t avail = ptr - base;
3190 if (avail > count) {
3194 Move(buf-avail,ptr,avail,STDCHAR);
3197 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3198 if (PerlSIO_feof(s) && unread >= 0)
3199 PerlSIO_clearerr(s);
3204 if (PerlIO_has_cntptr(f)) {
3205 /* We can get pointer to buffer but not its base
3206 Do ungetc() but check chars are ending up in the
3209 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3210 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3212 const int ch = *--buf & 0xFF;
3213 if (ungetc(ch,s) != ch) {
3214 /* ungetc did not work */
3217 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3218 /* Did not change pointer as expected */
3219 fgetc(s); /* get char back again */
3229 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3235 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3240 got = PerlSIO_fwrite(vbuf, 1, count,
3241 PerlIOSelf(f, PerlIOStdio)->stdio);
3242 if (got >= 0 || errno != EINTR)
3245 SETERRNO(0,0); /* just in case */
3251 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3253 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3254 PERL_UNUSED_CONTEXT;
3256 return PerlSIO_fseek(stdio, offset, whence);
3260 PerlIOStdio_tell(pTHX_ PerlIO *f)
3262 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3263 PERL_UNUSED_CONTEXT;
3265 return PerlSIO_ftell(stdio);
3269 PerlIOStdio_flush(pTHX_ PerlIO *f)
3271 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3272 PERL_UNUSED_CONTEXT;
3274 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3275 return PerlSIO_fflush(stdio);
3281 * FIXME: This discards ungetc() and pre-read stuff which is not
3282 * right if this is just a "sync" from a layer above Suspect right
3283 * design is to do _this_ but not have layer above flush this
3284 * layer read-to-read
3287 * Not writeable - sync by attempting a seek
3289 const int err = errno;
3290 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3298 PerlIOStdio_eof(pTHX_ PerlIO *f)
3300 PERL_UNUSED_CONTEXT;
3302 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3306 PerlIOStdio_error(pTHX_ PerlIO *f)
3308 PERL_UNUSED_CONTEXT;
3310 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3314 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3316 PERL_UNUSED_CONTEXT;
3318 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3322 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3324 PERL_UNUSED_CONTEXT;
3326 #ifdef HAS_SETLINEBUF
3327 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3329 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3335 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3337 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3338 return (STDCHAR*)PerlSIO_get_base(stdio);
3342 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3344 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3345 return PerlSIO_get_bufsiz(stdio);
3349 #ifdef USE_STDIO_PTR
3351 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3353 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3354 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3358 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3360 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3361 return PerlSIO_get_cnt(stdio);
3365 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3367 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3369 #ifdef STDIO_PTR_LVALUE
3370 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3371 #ifdef STDIO_PTR_LVAL_SETS_CNT
3372 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3373 assert(PerlSIO_get_cnt(stdio) == (cnt));
3376 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3378 * Setting ptr _does_ change cnt - we are done
3382 #else /* STDIO_PTR_LVALUE */
3384 #endif /* STDIO_PTR_LVALUE */
3387 * Now (or only) set cnt
3389 #ifdef STDIO_CNT_LVALUE
3390 PerlSIO_set_cnt(stdio, cnt);
3391 #else /* STDIO_CNT_LVALUE */
3392 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3393 PerlSIO_set_ptr(stdio,
3394 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3396 #else /* STDIO_PTR_LVAL_SETS_CNT */
3398 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3399 #endif /* STDIO_CNT_LVALUE */
3406 PerlIOStdio_fill(pTHX_ PerlIO *f)
3408 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3410 PERL_UNUSED_CONTEXT;
3413 * fflush()ing read-only streams can cause trouble on some stdio-s
3415 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3416 if (PerlSIO_fflush(stdio) != 0)
3419 c = PerlSIO_fgetc(stdio);
3423 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3425 #ifdef STDIO_BUFFER_WRITABLE
3426 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3427 /* Fake ungetc() to the real buffer in case system's ungetc
3430 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3431 SSize_t cnt = PerlSIO_get_cnt(stdio);
3432 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3433 if (ptr == base+1) {
3434 *--ptr = (STDCHAR) c;
3435 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3436 if (PerlSIO_feof(stdio))
3437 PerlSIO_clearerr(stdio);
3443 if (PerlIO_has_cntptr(f)) {
3445 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3452 /* An ungetc()d char is handled separately from the regular
3453 * buffer, so we stuff it in the buffer ourselves.
3454 * Should never get called as should hit code above
3456 *(--((*stdio)->_ptr)) = (unsigned char) c;
3459 /* If buffer snoop scheme above fails fall back to
3462 if (PerlSIO_ungetc(c, stdio) != c)
3470 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3471 sizeof(PerlIO_funcs),
3473 sizeof(PerlIOStdio),
3474 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3478 PerlIOBase_binmode, /* binmode */
3492 PerlIOStdio_clearerr,
3493 PerlIOStdio_setlinebuf,
3495 PerlIOStdio_get_base,
3496 PerlIOStdio_get_bufsiz,
3501 #ifdef USE_STDIO_PTR
3502 PerlIOStdio_get_ptr,
3503 PerlIOStdio_get_cnt,
3504 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3505 PerlIOStdio_set_ptrcnt,
3508 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3513 #endif /* USE_STDIO_PTR */
3516 /* Note that calls to PerlIO_exportFILE() are reversed using
3517 * PerlIO_releaseFILE(), not importFILE. */
3519 PerlIO_exportFILE(PerlIO * f, const char *mode)
3523 if (PerlIOValid(f)) {
3526 if (!mode || !*mode) {
3527 mode = PerlIO_modestr(f, buf);
3529 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3533 /* De-link any lower layers so new :stdio sticks */
3535 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3536 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3538 /* Link previous lower layers under new one */
3542 /* restore layers list */
3552 PerlIO_findFILE(PerlIO *f)
3556 if (l->tab == &PerlIO_stdio) {
3557 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3560 l = *PerlIONext(&l);
3562 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3563 return PerlIO_exportFILE(f, NULL);
3566 /* Use this to reverse PerlIO_exportFILE calls. */
3568 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3573 if (l->tab == &PerlIO_stdio) {
3574 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3575 if (s->stdio == f) {
3577 PerlIO_pop(aTHX_ p);
3586 /*--------------------------------------------------------------------------------------*/
3588 * perlio buffer layer
3592 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3594 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3595 const int fd = PerlIO_fileno(f);
3596 if (fd >= 0 && PerlLIO_isatty(fd)) {
3597 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3599 if (*PerlIONext(f)) {
3600 const Off_t posn = PerlIO_tell(PerlIONext(f));
3601 if (posn != (Off_t) - 1) {
3605 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3609 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3610 IV n, const char *mode, int fd, int imode, int perm,
3611 PerlIO *f, int narg, SV **args)
3613 if (PerlIOValid(f)) {
3614 PerlIO *next = PerlIONext(f);
3616 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3617 if (tab && tab->Open)
3619 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3621 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3626 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3628 if (*mode == IoTYPE_IMPLICIT) {
3634 if (tab && tab->Open)
3635 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3638 SETERRNO(EINVAL, LIB_INVARG);
3640 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3642 * if push fails during open, open fails. close will pop us.
3647 fd = PerlIO_fileno(f);
3648 if (init && fd == 2) {
3650 * Initial stderr is unbuffered
3652 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3654 #ifdef PERLIO_USING_CRLF
3655 # ifdef PERLIO_IS_BINMODE_FD
3656 if (PERLIO_IS_BINMODE_FD(fd))
3657 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3661 * do something about failing setmode()? --jhi
3663 PerlLIO_setmode(fd, O_BINARY);
3672 * This "flush" is akin to sfio's sync in that it handles files in either
3673 * read or write state. For write state, we put the postponed data through
3674 * the next layers. For read state, we seek() the next layers to the
3675 * offset given by current position in the buffer, and discard the buffer
3676 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3677 * in any case?). Then the pass the stick further in chain.
3680 PerlIOBuf_flush(pTHX_ PerlIO *f)
3682 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3684 PerlIO *n = PerlIONext(f);
3685 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3687 * write() the buffer
3689 const STDCHAR *buf = b->buf;
3690 const STDCHAR *p = buf;
3691 while (p < b->ptr) {
3692 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3696 else if (count < 0 || PerlIO_error(n)) {
3697 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3702 b->posn += (p - buf);
3704 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3705 STDCHAR *buf = PerlIO_get_base(f);
3707 * Note position change
3709 b->posn += (b->ptr - buf);
3710 if (b->ptr < b->end) {
3711 /* We did not consume all of it - try and seek downstream to
3712 our logical position
3714 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3715 /* Reload n as some layers may pop themselves on seek */
3716 b->posn = PerlIO_tell(n = PerlIONext(f));
3719 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3720 data is lost for good - so return saying "ok" having undone
3723 b->posn -= (b->ptr - buf);
3728 b->ptr = b->end = b->buf;
3729 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3730 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3731 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3736 /* This discards the content of the buffer after b->ptr, and rereads
3737 * the buffer from the position off in the layer downstream; here off
3738 * is at offset corresponding to b->ptr - b->buf.
3741 PerlIOBuf_fill(pTHX_ PerlIO *f)
3743 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3744 PerlIO *n = PerlIONext(f);
3747 * Down-stream flush is defined not to loose read data so is harmless.
3748 * we would not normally be fill'ing if there was data left in anycase.
3750 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3752 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3753 PerlIOBase_flush_linebuf(aTHX);
3756 PerlIO_get_base(f); /* allocate via vtable */
3758 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3760 b->ptr = b->end = b->buf;
3762 if (!PerlIOValid(n)) {
3763 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3767 if (PerlIO_fast_gets(n)) {
3769 * Layer below is also buffered. We do _NOT_ want to call its
3770 * ->Read() because that will loop till it gets what we asked for
3771 * which may hang on a pipe etc. Instead take anything it has to
3772 * hand, or ask it to fill _once_.
3774 avail = PerlIO_get_cnt(n);
3776 avail = PerlIO_fill(n);
3778 avail = PerlIO_get_cnt(n);
3780 if (!PerlIO_error(n) && PerlIO_eof(n))
3785 STDCHAR *ptr = PerlIO_get_ptr(n);
3786 const SSize_t cnt = avail;
3787 if (avail > (SSize_t)b->bufsiz)
3789 Copy(ptr, b->buf, avail, STDCHAR);
3790 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3794 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3798 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3800 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3803 b->end = b->buf + avail;
3804 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3809 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3811 if (PerlIOValid(f)) {
3812 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3815 return PerlIOBase_read(aTHX_ f, vbuf, count);
3821 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3823 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3824 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3827 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3832 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3834 * Buffer is already a read buffer, we can overwrite any chars
3835 * which have been read back to buffer start
3837 avail = (b->ptr - b->buf);
3841 * Buffer is idle, set it up so whole buffer is available for
3845 b->end = b->buf + avail;
3847 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3849 * Buffer extends _back_ from where we are now
3851 b->posn -= b->bufsiz;
3853 if (avail > (SSize_t) count) {
3855 * If we have space for more than count, just move count
3863 * In simple stdio-like ungetc() case chars will be already
3866 if (buf != b->ptr) {
3867 Copy(buf, b->ptr, avail, STDCHAR);
3871 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3875 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3881 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3883 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3884 const STDCHAR *buf = (const STDCHAR *) vbuf;
3885 const STDCHAR *flushptr = buf;
3889 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3891 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3892 if (PerlIO_flush(f) != 0) {
3896 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3897 flushptr = buf + count;
3898 while (flushptr > buf && *(flushptr - 1) != '\n')
3902 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3903 if ((SSize_t) count < avail)
3905 if (flushptr > buf && flushptr <= buf + avail)
3906 avail = flushptr - buf;
3907 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3909 Copy(buf, b->ptr, avail, STDCHAR);
3914 if (buf == flushptr)
3917 if (b->ptr >= (b->buf + b->bufsiz))
3920 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3926 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3929 if ((code = PerlIO_flush(f)) == 0) {
3930 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3931 code = PerlIO_seek(PerlIONext(f), offset, whence);
3933 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3934 b->posn = PerlIO_tell(PerlIONext(f));
3941 PerlIOBuf_tell(pTHX_ PerlIO *f)
3943 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3945 * b->posn is file position where b->buf was read, or will be written
3947 Off_t posn = b->posn;
3948 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3949 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3951 /* As O_APPEND files are normally shared in some sense it is better
3956 /* when file is NOT shared then this is sufficient */
3957 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3959 posn = b->posn = PerlIO_tell(PerlIONext(f));
3963 * If buffer is valid adjust position by amount in buffer
3965 posn += (b->ptr - b->buf);
3971 PerlIOBuf_popped(pTHX_ PerlIO *f)
3973 const IV code = PerlIOBase_popped(aTHX_ f);
3974 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3975 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3978 b->ptr = b->end = b->buf = NULL;
3979 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3984 PerlIOBuf_close(pTHX_ PerlIO *f)
3986 const IV code = PerlIOBase_close(aTHX_ f);
3987 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3988 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3991 b->ptr = b->end = b->buf = NULL;
3992 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3997 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3999 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4006 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4008 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4011 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4012 return (b->end - b->ptr);
4017 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4019 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4020 PERL_UNUSED_CONTEXT;
4025 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
4027 b->buf = (STDCHAR *) & b->oneword;
4028 b->bufsiz = sizeof(b->oneword);
4030 b->end = b->ptr = b->buf;
4036 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4038 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4041 return (b->end - b->buf);
4045 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4047 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4051 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4052 assert(PerlIO_get_cnt(f) == cnt);
4053 assert(b->ptr >= b->buf);
4055 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4059 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4061 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4066 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4067 sizeof(PerlIO_funcs),
4070 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4074 PerlIOBase_binmode, /* binmode */
4088 PerlIOBase_clearerr,
4089 PerlIOBase_setlinebuf,
4094 PerlIOBuf_set_ptrcnt,
4097 /*--------------------------------------------------------------------------------------*/
4099 * Temp layer to hold unread chars when cannot do it any other way
4103 PerlIOPending_fill(pTHX_ PerlIO *f)
4106 * Should never happen
4113 PerlIOPending_close(pTHX_ PerlIO *f)
4116 * A tad tricky - flush pops us, then we close new top
4119 return PerlIO_close(f);
4123 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4126 * A tad tricky - flush pops us, then we seek new top
4129 return PerlIO_seek(f, offset, whence);
4134 PerlIOPending_flush(pTHX_ PerlIO *f)
4136 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4137 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4141 PerlIO_pop(aTHX_ f);
4146 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4152 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4157 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4159 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4160 PerlIOl * const l = PerlIOBase(f);
4162 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4163 * etc. get muddled when it changes mid-string when we auto-pop.
4165 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4166 (PerlIOBase(PerlIONext(f))->
4167 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4172 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4174 SSize_t avail = PerlIO_get_cnt(f);
4176 if ((SSize_t)count < avail)
4179 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4180 if (got >= 0 && got < (SSize_t)count) {
4181 const SSize_t more =
4182 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4183 if (more >= 0 || got == 0)
4189 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4190 sizeof(PerlIO_funcs),
4193 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4194 PerlIOPending_pushed,
4197 PerlIOBase_binmode, /* binmode */
4206 PerlIOPending_close,
4207 PerlIOPending_flush,
4211 PerlIOBase_clearerr,
4212 PerlIOBase_setlinebuf,
4217 PerlIOPending_set_ptrcnt,
4222 /*--------------------------------------------------------------------------------------*/
4224 * crlf - translation On read translate CR,LF to "\n" we do this by
4225 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4226 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4228 * c->nl points on the first byte of CR LF pair when it is temporarily
4229 * replaced by LF, or to the last CR of the buffer. In the former case
4230 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4231 * that it ends at c->nl; these two cases can be distinguished by
4232 * *c->nl. c->nl is set during _getcnt() call, and unset during
4233 * _unread() and _flush() calls.
4234 * It only matters for read operations.
4238 PerlIOBuf base; /* PerlIOBuf stuff */
4239 STDCHAR *nl; /* Position of crlf we "lied" about in the
4243 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4244 * Otherwise the :crlf layer would always revert back to
4248 S_inherit_utf8_flag(PerlIO *f)
4250 PerlIO *g = PerlIONext(f);
4251 if (PerlIOValid(g)) {
4252 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4253 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4259 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4262 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4263 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4265 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4266 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4267 PerlIOBase(f)->flags);
4270 /* Enable the first CRLF capable layer you can find, but if none
4271 * found, the one we just pushed is fine. This results in at
4272 * any given moment at most one CRLF-capable layer being enabled
4273 * in the whole layer stack. */
4274 PerlIO *g = PerlIONext(f);
4275 while (PerlIOValid(g)) {
4276 PerlIOl *b = PerlIOBase(g);
4277 if (b && b->tab == &PerlIO_crlf) {
4278 if (!(b->flags & PERLIO_F_CRLF))
4279 b->flags |= PERLIO_F_CRLF;
4280 S_inherit_utf8_flag(g);
4281 PerlIO_pop(aTHX_ f);
4287 S_inherit_utf8_flag(f);
4293 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4295 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4296 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4300 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4301 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4303 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4304 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4306 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4311 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4312 b->end = b->ptr = b->buf + b->bufsiz;
4313 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4314 b->posn -= b->bufsiz;
4316 while (count > 0 && b->ptr > b->buf) {
4317 const int ch = *--buf;
4319 if (b->ptr - 2 >= b->buf) {
4326 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4327 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4343 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4345 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4347 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4350 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4351 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4352 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4353 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4355 while (nl < b->end && *nl != 0xd)
4357 if (nl < b->end && *nl == 0xd) {
4359 if (nl + 1 < b->end) {
4366 * Not CR,LF but just CR
4374 * Blast - found CR as last char in buffer
4379 * They may not care, defer work as long as
4383 return (nl - b->ptr);
4387 b->ptr++; /* say we have read it as far as
4388 * flush() is concerned */
4389 b->buf++; /* Leave space in front of buffer */
4390 /* Note as we have moved buf up flush's
4392 will naturally make posn point at CR
4394 b->bufsiz--; /* Buffer is thus smaller */
4395 code = PerlIO_fill(f); /* Fetch some more */
4396 b->bufsiz++; /* Restore size for next time */
4397 b->buf--; /* Point at space */
4398 b->ptr = nl = b->buf; /* Which is what we hand
4400 *nl = 0xd; /* Fill in the CR */
4402 goto test; /* fill() call worked */
4404 * CR at EOF - just fall through
4406 /* Should we clear EOF though ??? */
4411 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4417 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4419 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4420 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4426 if (ptr == b->end && *c->nl == 0xd) {
4427 /* Defered CR at end of buffer case - we lied about count */
4440 * Test code - delete when it works ...
4442 IV flags = PerlIOBase(f)->flags;
4443 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4444 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4445 /* Defered CR at end of buffer case - we lied about count */
4451 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4452 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4453 flags, c->nl, b->end, cnt);
4460 * They have taken what we lied about
4468 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4472 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4474 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4475 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4477 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4478 const STDCHAR *buf = (const STDCHAR *) vbuf;
4479 const STDCHAR * const ebuf = buf + count;
4482 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4484 while (buf < ebuf) {
4485 const STDCHAR * const eptr = b->buf + b->bufsiz;
4486 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4487 while (buf < ebuf && b->ptr < eptr) {
4489 if ((b->ptr + 2) > eptr) {
4497 *(b->ptr)++ = 0xd; /* CR */
4498 *(b->ptr)++ = 0xa; /* LF */
4500 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4507 *(b->ptr)++ = *buf++;
4509 if (b->ptr >= eptr) {
4515 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4517 return (buf - (STDCHAR *) vbuf);
4522 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4524 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4529 return PerlIOBuf_flush(aTHX_ f);
4533 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4535 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4536 /* In text mode - flush any pending stuff and flip it */
4537 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4538 #ifndef PERLIO_USING_CRLF
4539 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4540 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4541 PerlIO_pop(aTHX_ f);
4548 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4549 sizeof(PerlIO_funcs),
4552 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4554 PerlIOBuf_popped, /* popped */
4556 PerlIOCrlf_binmode, /* binmode */
4560 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4561 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4562 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4570 PerlIOBase_clearerr,
4571 PerlIOBase_setlinebuf,
4576 PerlIOCrlf_set_ptrcnt,
4580 /*--------------------------------------------------------------------------------------*/
4582 * mmap as "buffer" layer
4586 PerlIOBuf base; /* PerlIOBuf stuff */
4587 Mmap_t mptr; /* Mapped address */
4588 Size_t len; /* mapped length */
4589 STDCHAR *bbuf; /* malloced buffer if map fails */
4593 PerlIOMmap_map(pTHX_ PerlIO *f)
4596 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4597 const IV flags = PerlIOBase(f)->flags;
4601 if (flags & PERLIO_F_CANREAD) {
4602 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4603 const int fd = PerlIO_fileno(f);
4605 code = Fstat(fd, &st);
4606 if (code == 0 && S_ISREG(st.st_mode)) {
4607 SSize_t len = st.st_size - b->posn;
4610 if (PL_mmap_page_size <= 0)
4611 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4615 * This is a hack - should never happen - open should
4618 b->posn = PerlIO_tell(PerlIONext(f));
4620 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4621 len = st.st_size - posn;
4622 m->mptr = (Mmap_t)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4623 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4624 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4625 madvise(m->mptr, len, MADV_SEQUENTIAL);
4627 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4628 madvise(m->mptr, len, MADV_WILLNEED);
4630 PerlIOBase(f)->flags =
4631 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4632 b->end = ((STDCHAR *) m->mptr) + len;
4633 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4642 PerlIOBase(f)->flags =
4643 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4645 b->ptr = b->end = b->ptr;
4654 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4656 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4659 PerlIOBuf * const b = &m->base;
4661 /* The munmap address argument is tricky: depending on the
4662 * standard it is either "void *" or "caddr_t" (which is
4663 * usually "char *" (signed or unsigned). If we cast it
4664 * to "void *", those that have it caddr_t and an uptight
4665 * C++ compiler, will freak out. But casting it as char*
4666 * should work. Maybe. (Using Mmap_t figured out by
4667 * Configure doesn't always work, apparently.) */
4668 code = munmap((char*)m->mptr, m->len);
4672 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4675 b->ptr = b->end = b->buf;
4676 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4682 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4684 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4685 PerlIOBuf * const b = &m->base;
4686 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4688 * Already have a readbuffer in progress
4694 * We have a write buffer or flushed PerlIOBuf read buffer
4696 m->bbuf = b->buf; /* save it in case we need it again */
4697 b->buf = NULL; /* Clear to trigger below */
4700 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4703 * Map did not work - recover PerlIOBuf buffer if we have one
4708 b->ptr = b->end = b->buf;
4711 return PerlIOBuf_get_base(aTHX_ f);
4715 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4717 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4718 PerlIOBuf * const b = &m->base;
4719 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4721 if (b->ptr && (b->ptr - count) >= b->buf
4722 && memEQ(b->ptr - count, vbuf, count)) {
4724 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4729 * Loose the unwritable mapped buffer
4733 * If flush took the "buffer" see if we have one from before
4735 if (!b->buf && m->bbuf)
4738 PerlIOBuf_get_base(aTHX_ f);
4742 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4746 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4748 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4749 PerlIOBuf * const b = &m->base;
4751 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4753 * No, or wrong sort of, buffer
4756 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4760 * If unmap took the "buffer" see if we have one from before
4762 if (!b->buf && m->bbuf)
4765 PerlIOBuf_get_base(aTHX_ f);
4769 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4773 PerlIOMmap_flush(pTHX_ PerlIO *f)
4775 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4776 PerlIOBuf * const b = &m->base;
4777 IV code = PerlIOBuf_flush(aTHX_ f);
4779 * Now we are "synced" at PerlIOBuf level
4786 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4791 * We seem to have a PerlIOBuf buffer which was not mapped
4792 * remember it in case we need one later
4801 PerlIOMmap_fill(pTHX_ PerlIO *f)
4803 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4804 IV code = PerlIO_flush(f);
4805 if (code == 0 && !b->buf) {
4806 code = PerlIOMmap_map(aTHX_ f);
4808 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4809 code = PerlIOBuf_fill(aTHX_ f);
4815 PerlIOMmap_close(pTHX_ PerlIO *f)
4817 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4818 PerlIOBuf * const b = &m->base;
4819 IV code = PerlIO_flush(f);
4823 b->ptr = b->end = b->buf;
4825 if (PerlIOBuf_close(aTHX_ f) != 0)
4831 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4833 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4837 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4838 sizeof(PerlIO_funcs),
4841 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4845 PerlIOBase_binmode, /* binmode */
4859 PerlIOBase_clearerr,
4860 PerlIOBase_setlinebuf,
4861 PerlIOMmap_get_base,
4865 PerlIOBuf_set_ptrcnt,
4868 #endif /* HAS_MMAP */
4871 Perl_PerlIO_stdin(pTHX)
4875 PerlIO_stdstreams(aTHX);
4877 return &PL_perlio[1];
4881 Perl_PerlIO_stdout(pTHX)
4885 PerlIO_stdstreams(aTHX);
4887 return &PL_perlio[2];
4891 Perl_PerlIO_stderr(pTHX)
4895 PerlIO_stdstreams(aTHX);
4897 return &PL_perlio[3];
4900 /*--------------------------------------------------------------------------------------*/
4903 PerlIO_getname(PerlIO *f, char *buf)
4908 bool exported = FALSE;
4909 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4911 stdio = PerlIO_exportFILE(f,0);
4915 name = fgetname(stdio, buf);
4916 if (exported) PerlIO_releaseFILE(f,stdio);
4921 PERL_UNUSED_ARG(buf);
4922 Perl_croak(aTHX_ "Don't know how to get file name");
4928 /*--------------------------------------------------------------------------------------*/
4930 * Functions which can be called on any kind of PerlIO implemented in
4934 #undef PerlIO_fdopen
4936 PerlIO_fdopen(int fd, const char *mode)
4939 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4944 PerlIO_open(const char *path, const char *mode)
4947 SV *name = sv_2mortal(newSVpv(path, 0));
4948 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4951 #undef Perlio_reopen
4953 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4956 SV *name = sv_2mortal(newSVpv(path,0));
4957 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4962 PerlIO_getc(PerlIO *f)
4966 if ( 1 == PerlIO_read(f, buf, 1) ) {
4967 return (unsigned char) buf[0];
4972 #undef PerlIO_ungetc
4974 PerlIO_ungetc(PerlIO *f, int ch)
4979 if (PerlIO_unread(f, &buf, 1) == 1)
4987 PerlIO_putc(PerlIO *f, int ch)
4991 return PerlIO_write(f, &buf, 1);
4996 PerlIO_puts(PerlIO *f, const char *s)
4999 return PerlIO_write(f, s, strlen(s));
5002 #undef PerlIO_rewind
5004 PerlIO_rewind(PerlIO *f)
5007 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
5011 #undef PerlIO_vprintf
5013 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
5016 SV * const sv = newSVpvs("");
5022 Perl_va_copy(ap, apc);
5023 sv_vcatpvf(sv, fmt, &apc);
5025 sv_vcatpvf(sv, fmt, &ap);
5027 s = SvPV_const(sv, len);
5028 wrote = PerlIO_write(f, s, len);
5033 #undef PerlIO_printf
5035 PerlIO_printf(PerlIO *f, const char *fmt, ...)
5040 result = PerlIO_vprintf(f, fmt, ap);
5045 #undef PerlIO_stdoutf
5047 PerlIO_stdoutf(const char *fmt, ...)
5053 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5058 #undef PerlIO_tmpfile
5060 PerlIO_tmpfile(void)
5065 const int fd = win32_tmpfd();
5067 f = PerlIO_fdopen(fd, "w+b");
5069 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5070 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5072 * I have no idea how portable mkstemp() is ... NI-S
5074 const int fd = mkstemp(SvPVX(sv));
5076 f = PerlIO_fdopen(fd, "w+");
5078 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5079 PerlLIO_unlink(SvPVX_const(sv));
5082 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5083 FILE * const stdio = PerlSIO_tmpfile();
5086 f = PerlIO_fdopen(fileno(stdio), "w+");
5088 # endif /* else HAS_MKSTEMP */
5089 #endif /* else WIN32 */
5096 #endif /* USE_SFIO */
5097 #endif /* PERLIO_IS_STDIO */
5099 /*======================================================================================*/
5101 * Now some functions in terms of above which may be needed even if we are
5102 * not in true PerlIO mode
5105 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5108 const char *type = NULL;
5110 * Need to supply default layer info from open.pm
5112 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5114 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5119 type = SvPV_const(layers, len);
5120 if (type && mode && mode[0] != 'r') {
5122 * Skip to write part, which is separated by a '\0'
5124 STRLEN read_len = strlen(type);
5125 if (read_len < len) {
5126 type += read_len + 1;
5136 #undef PerlIO_setpos
5138 PerlIO_setpos(PerlIO *f, SV *pos)
5143 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5144 if (f && len == sizeof(Off_t))
5145 return PerlIO_seek(f, *posn, SEEK_SET);
5147 SETERRNO(EINVAL, SS_IVCHAN);
5151 #undef PerlIO_setpos
5153 PerlIO_setpos(PerlIO *f, SV *pos)
5158 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5159 if (f && len == sizeof(Fpos_t)) {
5160 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5161 return fsetpos64(f, fpos);
5163 return fsetpos(f, fpos);
5167 SETERRNO(EINVAL, SS_IVCHAN);
5173 #undef PerlIO_getpos
5175 PerlIO_getpos(PerlIO *f, SV *pos)
5178 Off_t posn = PerlIO_tell(f);
5179 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5180 return (posn == (Off_t) - 1) ? -1 : 0;
5183 #undef PerlIO_getpos
5185 PerlIO_getpos(PerlIO *f, SV *pos)
5190 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5191 code = fgetpos64(f, &fpos);
5193 code = fgetpos(f, &fpos);
5195 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5200 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5203 vprintf(char *pat, char *args)
5205 _doprnt(pat, args, stdout);
5206 return 0; /* wrong, but perl doesn't use the return
5211 vfprintf(FILE *fd, char *pat, char *args)
5213 _doprnt(pat, args, fd);
5214 return 0; /* wrong, but perl doesn't use the return
5220 #ifndef PerlIO_vsprintf
5222 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5225 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5226 PERL_UNUSED_CONTEXT;
5228 #ifndef PERL_MY_VSNPRINTF_GUARDED
5229 if (val < 0 || (n > 0 ? val >= n : 0)) {
5230 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5237 #ifndef PerlIO_sprintf
5239 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5244 result = PerlIO_vsprintf(s, n, fmt, ap);
5252 * c-indentation-style: bsd
5254 * indent-tabs-mode: t
5257 * ex: set ts=8 sts=4 sw=4 noet: