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++) {
649 if (proto->array[i].arg)
650 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
651 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
658 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
661 PerlIO **table = &proto->Iperlio;
664 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
665 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
666 PerlIO_allocate(aTHX); /* root slot is never used */
667 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
668 while ((f = *table)) {
670 table = (PerlIO **) (f++);
671 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
673 (void) fp_dup(f, 0, param);
680 PERL_UNUSED_ARG(proto);
681 PERL_UNUSED_ARG(param);
686 PerlIO_destruct(pTHX)
689 PerlIO **table = &PL_perlio;
692 PerlIO_debug("Destruct %p\n",(void*)aTHX);
694 while ((f = *table)) {
696 table = (PerlIO **) (f++);
697 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
701 if (l->tab->kind & PERLIO_K_DESTRUCT) {
702 PerlIO_debug("Destruct popping %s\n", l->tab->name);
716 PerlIO_pop(pTHX_ PerlIO *f)
718 const PerlIOl *l = *f;
720 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
721 if (l->tab->Popped) {
723 * If popped returns non-zero do not free its layer structure
724 * it has either done so itself, or it is shared and still in
727 if ((*l->tab->Popped) (aTHX_ f) != 0)
735 /* Return as an array the stack of layers on a filehandle. Note that
736 * the stack is returned top-first in the array, and there are three
737 * times as many array elements as there are layers in the stack: the
738 * first element of a layer triplet is the name, the second one is the
739 * arguments, and the third one is the flags. */
742 PerlIO_get_layers(pTHX_ PerlIO *f)
745 AV * const av = newAV();
747 if (PerlIOValid(f)) {
748 PerlIOl *l = PerlIOBase(f);
751 SV * const name = l->tab && l->tab->name ?
752 newSVpv(l->tab->name, 0) : &PL_sv_undef;
753 SV * const arg = l->tab && l->tab->Getarg ?
754 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
757 av_push(av, newSViv((IV)l->flags));
765 /*--------------------------------------------------------------------------------------*/
767 * XS Interface for perl code
771 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
775 if ((SSize_t) len <= 0)
777 for (i = 0; i < PL_known_layers->cur; i++) {
778 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
779 if (memEQ(f->name, name, len) && f->name[len] == 0) {
780 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
784 if (load && PL_subname && PL_def_layerlist
785 && PL_def_layerlist->cur >= 2) {
786 if (PL_in_load_module) {
787 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
790 SV * const pkgsv = newSVpvs("PerlIO");
791 SV * const layer = newSVpvn(name, len);
792 CV * const cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
794 SAVEINT(PL_in_load_module);
796 SAVEGENERICSV(PL_warnhook);
797 PL_warnhook = (SV *) (SvREFCNT_inc_simple_NN(cv));
801 * The two SVs are magically freed by load_module
803 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
806 return PerlIO_find_layer(aTHX_ name, len, 0);
809 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
813 #ifdef USE_ATTRIBUTES_FOR_PERLIO
816 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
819 IO * const io = GvIOn((GV *) SvRV(sv));
820 PerlIO * const ifp = IoIFP(io);
821 PerlIO * const ofp = IoOFP(io);
822 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
828 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
831 IO * const io = GvIOn((GV *) SvRV(sv));
832 PerlIO * const ifp = IoIFP(io);
833 PerlIO * const ofp = IoOFP(io);
834 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
840 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
842 Perl_warn(aTHX_ "clear %" SVf, sv);
847 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
849 Perl_warn(aTHX_ "free %" SVf, sv);
853 MGVTBL perlio_vtab = {
861 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
864 SV * const sv = SvRV(ST(1));
865 AV * const av = newAV();
869 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
871 mg = mg_find(sv, PERL_MAGIC_ext);
872 mg->mg_virtual = &perlio_vtab;
874 Perl_warn(aTHX_ "attrib %" SVf, sv);
875 for (i = 2; i < items; i++) {
877 const char * const name = SvPV_const(ST(i), len);
878 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
880 av_push(av, SvREFCNT_inc_simple_NN(layer));
891 #endif /* USE_ATTIBUTES_FOR_PERLIO */
894 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
896 HV * const stash = gv_stashpvs("PerlIO::Layer", TRUE);
897 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
901 XS(XS_PerlIO__Layer__NoWarnings)
903 /* This is used as a %SIG{__WARN__} handler to supress warnings
904 during loading of layers.
909 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
913 XS(XS_PerlIO__Layer__find)
918 Perl_croak(aTHX_ "Usage class->find(name[,load])");
921 const char * const name = SvPV_const(ST(1), len);
922 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
923 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
925 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
932 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
935 if (!PL_known_layers)
936 PL_known_layers = PerlIO_list_alloc(aTHX);
937 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
938 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
942 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
946 const char *s = names;
948 while (isSPACE(*s) || *s == ':')
953 const char *as = NULL;
955 if (!isIDFIRST(*s)) {
957 * Message is consistent with how attribute lists are
958 * passed. Even though this means "foo : : bar" is
959 * seen as an invalid separator character.
961 const char q = ((*s == '\'') ? '"' : '\'');
962 if (ckWARN(WARN_LAYER))
963 Perl_warner(aTHX_ packWARN(WARN_LAYER),
964 "Invalid separator character %c%c%c in PerlIO layer specification %s",
966 SETERRNO(EINVAL, LIB_INVARG);
971 } while (isALNUM(*e));
987 * It's a nul terminated string, not allowed
988 * to \ the terminating null. Anything other
989 * character is passed over.
999 if (ckWARN(WARN_LAYER))
1000 Perl_warner(aTHX_ packWARN(WARN_LAYER),
1001 "Argument list not closed for PerlIO layer \"%.*s\"",
1013 PerlIO_funcs * const layer =
1014 PerlIO_find_layer(aTHX_ s, llen, 1);
1016 PerlIO_list_push(aTHX_ av, layer,
1022 if (ckWARN(WARN_LAYER))
1023 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1036 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1039 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1040 #ifdef PERLIO_USING_CRLF
1043 if (PerlIO_stdio.Set_ptrcnt)
1044 tab = &PerlIO_stdio;
1046 PerlIO_debug("Pushing %s\n", tab->name);
1047 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1052 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1054 return av->array[n].arg;
1058 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1060 if (n >= 0 && n < av->cur) {
1061 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1062 av->array[n].funcs->name);
1063 return av->array[n].funcs;
1066 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1071 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1073 PERL_UNUSED_ARG(mode);
1074 PERL_UNUSED_ARG(arg);
1075 PERL_UNUSED_ARG(tab);
1076 if (PerlIOValid(f)) {
1078 PerlIO_pop(aTHX_ f);
1084 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1085 sizeof(PerlIO_funcs),
1088 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1108 NULL, /* get_base */
1109 NULL, /* get_bufsiz */
1112 NULL, /* set_ptrcnt */
1116 PerlIO_default_layers(pTHX)
1119 if (!PL_def_layerlist) {
1120 const char * const s = (PL_tainting) ? NULL : PerlEnv_getenv("PERLIO");
1121 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1122 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1123 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1125 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1127 osLayer = &PerlIO_win32;
1130 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1131 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1132 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1133 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1135 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_mmap));
1137 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1138 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1139 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1140 PerlIO_list_push(aTHX_ PL_def_layerlist,
1141 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1144 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1147 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1150 if (PL_def_layerlist->cur < 2) {
1151 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1153 return PL_def_layerlist;
1157 Perl_boot_core_PerlIO(pTHX)
1159 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1160 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1163 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1164 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1168 PerlIO_default_layer(pTHX_ I32 n)
1171 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1174 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1177 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1178 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1181 PerlIO_stdstreams(pTHX)
1185 PerlIO_allocate(aTHX);
1186 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1187 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1188 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1193 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1195 if (tab->fsize != sizeof(PerlIO_funcs)) {
1197 Perl_croak(aTHX_ "Layer does not match this perl");
1201 if (tab->size < sizeof(PerlIOl)) {
1204 /* Real layer with a data area */
1207 Newxz(temp, tab->size, char);
1211 l->tab = (PerlIO_funcs*) tab;
1213 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1214 (void*)f, tab->name,
1215 (mode) ? mode : "(Null)", (void*)arg);
1216 if (*l->tab->Pushed &&
1218 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1219 PerlIO_pop(aTHX_ f);
1228 /* Pseudo-layer where push does its own stack adjust */
1229 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1230 (mode) ? mode : "(Null)", (void*)arg);
1232 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1240 PerlIOBase_binmode(pTHX_ PerlIO *f)
1242 if (PerlIOValid(f)) {
1243 /* Is layer suitable for raw stream ? */
1244 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1245 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1246 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1249 /* Not suitable - pop it */
1250 PerlIO_pop(aTHX_ f);
1258 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1260 PERL_UNUSED_ARG(mode);
1261 PERL_UNUSED_ARG(arg);
1262 PERL_UNUSED_ARG(tab);
1264 if (PerlIOValid(f)) {
1269 * Strip all layers that are not suitable for a raw stream
1272 while (t && (l = *t)) {
1273 if (l->tab->Binmode) {
1274 /* Has a handler - normal case */
1275 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1277 /* Layer still there - move down a layer */
1286 /* No handler - pop it */
1287 PerlIO_pop(aTHX_ t);
1290 if (PerlIOValid(f)) {
1291 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1299 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1300 PerlIO_list_t *layers, IV n, IV max)
1304 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1306 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1317 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1321 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1322 code = PerlIO_parse_layers(aTHX_ layers, names);
1324 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1326 PerlIO_list_free(aTHX_ layers);
1332 /*--------------------------------------------------------------------------------------*/
1334 * Given the abstraction above the public API functions
1338 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1340 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1341 (PerlIOBase(f)) ? PerlIOBase(f)->tab->name : "(Null)",
1342 iotype, mode, (names) ? names : "(Null)");
1345 /* Do not flush etc. if (e.g.) switching encodings.
1346 if a pushed layer knows it needs to flush lower layers
1347 (for example :unix which is never going to call them)
1348 it can do the flush when it is pushed.
1350 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1353 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1354 #ifdef PERLIO_USING_CRLF
1355 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1356 O_BINARY so we can look for it in mode.
1358 if (!(mode & O_BINARY)) {
1360 /* FIXME?: Looking down the layer stack seems wrong,
1361 but is a way of reaching past (say) an encoding layer
1362 to flip CRLF-ness of the layer(s) below
1365 /* Perhaps we should turn on bottom-most aware layer
1366 e.g. Ilya's idea that UNIX TTY could serve
1368 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1369 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1370 /* Not in text mode - flush any pending stuff and flip it */
1372 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1374 /* Only need to turn it on in one layer so we are done */
1379 /* Not finding a CRLF aware layer presumably means we are binary
1380 which is not what was requested - so we failed
1381 We _could_ push :crlf layer but so could caller
1386 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1387 So code that used to be here is now in PerlIORaw_pushed().
1389 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1394 PerlIO__close(pTHX_ PerlIO *f)
1396 if (PerlIOValid(f)) {
1397 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1398 if (tab && tab->Close)
1399 return (*tab->Close)(aTHX_ f);
1401 return PerlIOBase_close(aTHX_ f);
1404 SETERRNO(EBADF, SS_IVCHAN);
1410 Perl_PerlIO_close(pTHX_ PerlIO *f)
1412 const int code = PerlIO__close(aTHX_ f);
1413 while (PerlIOValid(f)) {
1414 PerlIO_pop(aTHX_ f);
1420 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1423 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1427 static PerlIO_funcs *
1428 PerlIO_layer_from_ref(pTHX_ SV *sv)
1432 * For any scalar type load the handler which is bundled with perl
1434 if (SvTYPE(sv) < SVt_PVAV)
1435 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1438 * For other types allow if layer is known but don't try and load it
1440 switch (SvTYPE(sv)) {
1442 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1444 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1446 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1448 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1455 PerlIO_resolve_layers(pTHX_ const char *layers,
1456 const char *mode, int narg, SV **args)
1459 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1462 PerlIO_stdstreams(aTHX);
1464 SV * const arg = *args;
1466 * If it is a reference but not an object see if we have a handler
1469 if (SvROK(arg) && !sv_isobject(arg)) {
1470 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1472 def = PerlIO_list_alloc(aTHX);
1473 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1477 * Don't fail if handler cannot be found :via(...) etc. may do
1478 * something sensible else we will just stringfy and open
1483 if (!layers || !*layers)
1484 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1485 if (layers && *layers) {
1489 av = PerlIO_list_alloc(aTHX);
1490 for (i = 0; i < def->cur; i++) {
1491 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1498 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1502 PerlIO_list_free(aTHX_ av);
1514 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1515 int imode, int perm, PerlIO *f, int narg, SV **args)
1518 if (!f && narg == 1 && *args == &PL_sv_undef) {
1519 if ((f = PerlIO_tmpfile())) {
1520 if (!layers || !*layers)
1521 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1522 if (layers && *layers)
1523 PerlIO_apply_layers(aTHX_ f, mode, layers);
1527 PerlIO_list_t *layera;
1529 PerlIO_funcs *tab = NULL;
1530 if (PerlIOValid(f)) {
1532 * This is "reopen" - it is not tested as perl does not use it
1536 layera = PerlIO_list_alloc(aTHX);
1538 SV * const arg = (l->tab->Getarg)
1539 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1541 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1542 l = *PerlIONext(&l);
1546 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1552 * Start at "top" of layer stack
1554 n = layera->cur - 1;
1556 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1565 * Found that layer 'n' can do opens - call it
1567 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1568 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1570 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1571 tab->name, layers ? layers : "(Null)", mode, fd,
1572 imode, perm, (void*)f, narg, (void*)args);
1574 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1577 SETERRNO(EINVAL, LIB_INVARG);
1581 if (n + 1 < layera->cur) {
1583 * More layers above the one that we used to open -
1586 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1587 /* If pushing layers fails close the file */
1594 PerlIO_list_free(aTHX_ layera);
1601 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1603 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1607 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1609 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1613 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1615 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1619 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1621 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1625 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1627 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1631 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1636 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1638 if (tab && tab->Flush)
1639 return (*tab->Flush) (aTHX_ f);
1641 return 0; /* If no Flush defined, silently succeed. */
1644 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1645 SETERRNO(EBADF, SS_IVCHAN);
1651 * Is it good API design to do flush-all on NULL, a potentially
1652 * errorneous input? Maybe some magical value (PerlIO*
1653 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1654 * things on fflush(NULL), but should we be bound by their design
1657 PerlIO **table = &PL_perlio;
1659 while ((f = *table)) {
1661 table = (PerlIO **) (f++);
1662 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1663 if (*f && PerlIO_flush(f) != 0)
1673 PerlIOBase_flush_linebuf(pTHX)
1676 PerlIO **table = &PL_perlio;
1678 while ((f = *table)) {
1680 table = (PerlIO **) (f++);
1681 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1684 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1685 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1693 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1695 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1699 PerlIO_isutf8(PerlIO *f)
1702 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1704 SETERRNO(EBADF, SS_IVCHAN);
1710 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1712 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1716 Perl_PerlIO_error(pTHX_ PerlIO *f)
1718 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1722 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1724 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1728 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1730 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1734 PerlIO_has_base(PerlIO *f)
1736 if (PerlIOValid(f)) {
1737 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1740 return (tab->Get_base != NULL);
1741 SETERRNO(EINVAL, LIB_INVARG);
1744 SETERRNO(EBADF, SS_IVCHAN);
1750 PerlIO_fast_gets(PerlIO *f)
1752 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1753 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1756 return (tab->Set_ptrcnt != NULL);
1757 SETERRNO(EINVAL, LIB_INVARG);
1760 SETERRNO(EBADF, SS_IVCHAN);
1766 PerlIO_has_cntptr(PerlIO *f)
1768 if (PerlIOValid(f)) {
1769 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1772 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1773 SETERRNO(EINVAL, LIB_INVARG);
1776 SETERRNO(EBADF, SS_IVCHAN);
1782 PerlIO_canset_cnt(PerlIO *f)
1784 if (PerlIOValid(f)) {
1785 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1788 return (tab->Set_ptrcnt != NULL);
1789 SETERRNO(EINVAL, LIB_INVARG);
1792 SETERRNO(EBADF, SS_IVCHAN);
1798 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1800 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1804 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1806 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1810 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1812 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1816 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1818 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1822 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1824 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1828 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1830 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1834 /*--------------------------------------------------------------------------------------*/
1836 * utf8 and raw dummy layers
1840 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1842 PERL_UNUSED_CONTEXT;
1843 PERL_UNUSED_ARG(mode);
1844 PERL_UNUSED_ARG(arg);
1845 if (PerlIOValid(f)) {
1846 if (tab->kind & PERLIO_K_UTF8)
1847 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1849 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1855 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1856 sizeof(PerlIO_funcs),
1859 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1879 NULL, /* get_base */
1880 NULL, /* get_bufsiz */
1883 NULL, /* set_ptrcnt */
1886 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1887 sizeof(PerlIO_funcs),
1910 NULL, /* get_base */
1911 NULL, /* get_bufsiz */
1914 NULL, /* set_ptrcnt */
1918 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1919 IV n, const char *mode, int fd, int imode, int perm,
1920 PerlIO *old, int narg, SV **args)
1922 PerlIO_funcs * const tab = PerlIO_default_btm();
1923 PERL_UNUSED_ARG(self);
1924 if (tab && tab->Open)
1925 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1927 SETERRNO(EINVAL, LIB_INVARG);
1931 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1932 sizeof(PerlIO_funcs),
1955 NULL, /* get_base */
1956 NULL, /* get_bufsiz */
1959 NULL, /* set_ptrcnt */
1961 /*--------------------------------------------------------------------------------------*/
1962 /*--------------------------------------------------------------------------------------*/
1964 * "Methods" of the "base class"
1968 PerlIOBase_fileno(pTHX_ PerlIO *f)
1970 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1974 PerlIO_modestr(PerlIO * f, char *buf)
1977 if (PerlIOValid(f)) {
1978 const IV flags = PerlIOBase(f)->flags;
1979 if (flags & PERLIO_F_APPEND) {
1981 if (flags & PERLIO_F_CANREAD) {
1985 else if (flags & PERLIO_F_CANREAD) {
1987 if (flags & PERLIO_F_CANWRITE)
1990 else if (flags & PERLIO_F_CANWRITE) {
1992 if (flags & PERLIO_F_CANREAD) {
1996 #ifdef PERLIO_USING_CRLF
1997 if (!(flags & PERLIO_F_CRLF))
2007 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2009 PerlIOl * const l = PerlIOBase(f);
2010 PERL_UNUSED_CONTEXT;
2011 PERL_UNUSED_ARG(arg);
2013 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2014 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2015 if (tab->Set_ptrcnt != NULL)
2016 l->flags |= PERLIO_F_FASTGETS;
2018 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2022 l->flags |= PERLIO_F_CANREAD;
2025 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2028 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2031 SETERRNO(EINVAL, LIB_INVARG);
2037 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2040 l->flags &= ~PERLIO_F_CRLF;
2043 l->flags |= PERLIO_F_CRLF;
2046 SETERRNO(EINVAL, LIB_INVARG);
2053 l->flags |= l->next->flags &
2054 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2059 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2060 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2061 l->flags, PerlIO_modestr(f, temp));
2067 PerlIOBase_popped(pTHX_ PerlIO *f)
2069 PERL_UNUSED_CONTEXT;
2075 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2078 * Save the position as current head considers it
2080 const Off_t old = PerlIO_tell(f);
2081 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2082 PerlIOSelf(f, PerlIOBuf)->posn = old;
2083 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2087 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2089 STDCHAR *buf = (STDCHAR *) vbuf;
2091 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2092 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2093 SETERRNO(EBADF, SS_IVCHAN);
2099 SSize_t avail = PerlIO_get_cnt(f);
2102 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2104 STDCHAR *ptr = PerlIO_get_ptr(f);
2105 Copy(ptr, buf, take, STDCHAR);
2106 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2109 if (avail == 0) /* set_ptrcnt could have reset avail */
2112 if (count > 0 && avail <= 0) {
2113 if (PerlIO_fill(f) != 0)
2118 return (buf - (STDCHAR *) vbuf);
2124 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2126 PERL_UNUSED_CONTEXT;
2132 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2134 PERL_UNUSED_CONTEXT;
2140 PerlIOBase_close(pTHX_ PerlIO *f)
2143 if (PerlIOValid(f)) {
2144 PerlIO *n = PerlIONext(f);
2145 code = PerlIO_flush(f);
2146 PerlIOBase(f)->flags &=
2147 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2148 while (PerlIOValid(n)) {
2149 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2150 if (tab && tab->Close) {
2151 if ((*tab->Close)(aTHX_ n) != 0)
2156 PerlIOBase(n)->flags &=
2157 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2163 SETERRNO(EBADF, SS_IVCHAN);
2169 PerlIOBase_eof(pTHX_ PerlIO *f)
2171 PERL_UNUSED_CONTEXT;
2172 if (PerlIOValid(f)) {
2173 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2179 PerlIOBase_error(pTHX_ PerlIO *f)
2181 PERL_UNUSED_CONTEXT;
2182 if (PerlIOValid(f)) {
2183 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2189 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2191 if (PerlIOValid(f)) {
2192 PerlIO * const n = PerlIONext(f);
2193 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2200 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2202 PERL_UNUSED_CONTEXT;
2203 if (PerlIOValid(f)) {
2204 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2209 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2215 return sv_dup(arg, param);
2218 return newSVsv(arg);
2221 PERL_UNUSED_ARG(param);
2222 return newSVsv(arg);
2227 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2229 PerlIO * const nexto = PerlIONext(o);
2230 if (PerlIOValid(nexto)) {
2231 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2232 if (tab && tab->Dup)
2233 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2235 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2238 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2241 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2242 self->name, (void*)f, (void*)o, (void*)param);
2244 arg = (*self->Getarg)(aTHX_ o, param, flags);
2248 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2256 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2258 /* Must be called with PL_perlio_mutex locked. */
2260 S_more_refcounted_fds(pTHX_ const int new_fd) {
2262 const int old_max = PL_perlio_fd_refcnt_size;
2263 const int new_max = 16 + (new_fd & ~15);
2266 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2267 old_max, new_fd, new_max);
2269 if (new_fd < old_max) {
2273 assert (new_max > new_fd);
2276 (int*) PerlMemShared_realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2280 MUTEX_UNLOCK(&PL_perlio_mutex);
2282 /* Can't use PerlIO to write as it allocates memory */
2283 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2284 PL_no_mem, strlen(PL_no_mem));
2288 PL_perlio_fd_refcnt_size = new_max;
2289 PL_perlio_fd_refcnt = new_array;
2291 PerlIO_debug("Zeroing %p, %d\n",
2292 (void*)(new_array + old_max),
2295 Zero(new_array + old_max, new_max - old_max, int);
2302 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2303 PERL_UNUSED_CONTEXT;
2307 PerlIOUnix_refcnt_inc(int fd)
2314 MUTEX_LOCK(&PL_perlio_mutex);
2316 if (fd >= PL_perlio_fd_refcnt_size)
2317 S_more_refcounted_fds(aTHX_ fd);
2319 PL_perlio_fd_refcnt[fd]++;
2320 if (PL_perlio_fd_refcnt[fd] <= 0) {
2321 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2322 fd, PL_perlio_fd_refcnt[fd]);
2324 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2325 fd, PL_perlio_fd_refcnt[fd]);
2328 MUTEX_UNLOCK(&PL_perlio_mutex);
2331 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2336 PerlIOUnix_refcnt_dec(int fd)
2343 MUTEX_LOCK(&PL_perlio_mutex);
2345 if (fd >= PL_perlio_fd_refcnt_size) {
2346 Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
2347 fd, PL_perlio_fd_refcnt_size);
2349 if (PL_perlio_fd_refcnt[fd] <= 0) {
2350 Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
2351 fd, PL_perlio_fd_refcnt[fd]);
2353 cnt = --PL_perlio_fd_refcnt[fd];
2354 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2356 MUTEX_UNLOCK(&PL_perlio_mutex);
2359 Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
2365 PerlIO_cleanup(pTHX)
2370 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2372 PerlIO_debug("Cleanup layers\n");
2375 /* Raise STDIN..STDERR refcount so we don't close them */
2376 for (i=0; i < 3; i++)
2377 PerlIOUnix_refcnt_inc(i);
2378 PerlIO_cleantable(aTHX_ &PL_perlio);
2379 /* Restore STDIN..STDERR refcount */
2380 for (i=0; i < 3; i++)
2381 PerlIOUnix_refcnt_dec(i);
2383 if (PL_known_layers) {
2384 PerlIO_list_free(aTHX_ PL_known_layers);
2385 PL_known_layers = NULL;
2387 if (PL_def_layerlist) {
2388 PerlIO_list_free(aTHX_ PL_def_layerlist);
2389 PL_def_layerlist = NULL;
2393 void PerlIO_teardown(pTHX) /* Call only from PERL_SYS_TERM(). */
2397 /* By now all filehandles should have been closed, so any
2398 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2401 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2402 if (PL_perlio_fd_refcnt[i])
2403 PerlIO_debug("PerlIO_cleanup: fd %d refcnt=%d\n",
2404 i, PL_perlio_fd_refcnt[i]);
2409 MUTEX_LOCK(&PL_perlio_mutex);
2411 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2412 && PL_perlio_fd_refcnt) {
2413 #ifdef PERL_TRACK_MEMPOOL
2414 Malloc_t ptr = (Malloc_t)((char*)PL_perlio_fd_refcnt-sTHX);
2415 struct perl_memory_debug_header *const header
2416 = (struct perl_memory_debug_header *)ptr;
2417 /* Only the thread that allocated us can free us. */
2418 if (header->interpreter == aTHX)
2421 PerlMemShared_free(PL_perlio_fd_refcnt); /* Not Safefree() because was allocated with PerlMemShared_realloc(). */
2422 PL_perlio_fd_refcnt = NULL;
2423 PL_perlio_fd_refcnt_size = 0;
2427 MUTEX_UNLOCK(&PL_perlio_mutex);
2433 /*--------------------------------------------------------------------------------------*/
2435 * Bottom-most level for UNIX-like case
2439 struct _PerlIO base; /* The generic part */
2440 int fd; /* UNIX like file descriptor */
2441 int oflags; /* open/fcntl flags */
2445 PerlIOUnix_oflags(const char *mode)
2448 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2453 if (*++mode == '+') {
2460 oflags = O_CREAT | O_TRUNC;
2461 if (*++mode == '+') {
2470 oflags = O_CREAT | O_APPEND;
2471 if (*++mode == '+') {
2484 else if (*mode == 't') {
2486 oflags &= ~O_BINARY;
2490 * Always open in binary mode
2493 if (*mode || oflags == -1) {
2494 SETERRNO(EINVAL, LIB_INVARG);
2501 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2503 PERL_UNUSED_CONTEXT;
2504 return PerlIOSelf(f, PerlIOUnix)->fd;
2508 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2510 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2513 if (PerlLIO_fstat(fd, &st) == 0) {
2514 if (!S_ISREG(st.st_mode)) {
2515 PerlIO_debug("%d is not regular file\n",fd);
2516 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2519 PerlIO_debug("%d _is_ a regular file\n",fd);
2525 PerlIOUnix_refcnt_inc(fd);
2526 PERL_UNUSED_CONTEXT;
2530 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2532 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2533 if (*PerlIONext(f)) {
2534 /* We never call down so do any pending stuff now */
2535 PerlIO_flush(PerlIONext(f));
2537 * XXX could (or should) we retrieve the oflags from the open file
2538 * handle rather than believing the "mode" we are passed in? XXX
2539 * Should the value on NULL mode be 0 or -1?
2541 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2542 mode ? PerlIOUnix_oflags(mode) : -1);
2544 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2550 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2552 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2554 PERL_UNUSED_CONTEXT;
2555 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2557 SETERRNO(ESPIPE, LIB_INVARG);
2559 SETERRNO(EINVAL, LIB_INVARG);
2563 new_loc = PerlLIO_lseek(fd, offset, whence);
2564 if (new_loc == (Off_t) - 1)
2566 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2571 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2572 IV n, const char *mode, int fd, int imode,
2573 int perm, PerlIO *f, int narg, SV **args)
2575 if (PerlIOValid(f)) {
2576 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2577 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2580 if (*mode == IoTYPE_NUMERIC)
2583 imode = PerlIOUnix_oflags(mode);
2587 const char *path = SvPV_nolen_const(*args);
2588 fd = PerlLIO_open3(path, imode, perm);
2592 if (*mode == IoTYPE_IMPLICIT)
2595 f = PerlIO_allocate(aTHX);
2597 if (!PerlIOValid(f)) {
2598 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2602 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2603 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2604 if (*mode == IoTYPE_APPEND)
2605 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2612 * FIXME: pop layers ???
2620 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2622 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2624 if (flags & PERLIO_DUP_FD) {
2625 fd = PerlLIO_dup(fd);
2628 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2630 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2631 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2640 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2643 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2644 #ifdef PERLIO_STD_SPECIAL
2646 return PERLIO_STD_IN(fd, vbuf, count);
2648 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2649 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2653 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2654 if (len >= 0 || errno != EINTR) {
2656 if (errno != EAGAIN) {
2657 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2660 else if (len == 0 && count != 0) {
2661 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2672 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2675 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2676 #ifdef PERLIO_STD_SPECIAL
2677 if (fd == 1 || fd == 2)
2678 return PERLIO_STD_OUT(fd, vbuf, count);
2681 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2682 if (len >= 0 || errno != EINTR) {
2684 if (errno != EAGAIN) {
2685 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2696 PerlIOUnix_tell(pTHX_ PerlIO *f)
2698 PERL_UNUSED_CONTEXT;
2700 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2705 PerlIOUnix_close(pTHX_ PerlIO *f)
2708 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2710 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2711 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2712 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2717 SETERRNO(EBADF,SS_IVCHAN);
2720 while (PerlLIO_close(fd) != 0) {
2721 if (errno != EINTR) {
2728 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2733 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2734 sizeof(PerlIO_funcs),
2741 PerlIOBase_binmode, /* binmode */
2751 PerlIOBase_noop_ok, /* flush */
2752 PerlIOBase_noop_fail, /* fill */
2755 PerlIOBase_clearerr,
2756 PerlIOBase_setlinebuf,
2757 NULL, /* get_base */
2758 NULL, /* get_bufsiz */
2761 NULL, /* set_ptrcnt */
2764 /*--------------------------------------------------------------------------------------*/
2769 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2770 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2771 broken by the last second glibc 2.3 fix
2773 #define STDIO_BUFFER_WRITABLE
2778 struct _PerlIO base;
2779 FILE *stdio; /* The stream */
2783 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2785 PERL_UNUSED_CONTEXT;
2787 if (PerlIOValid(f)) {
2788 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2790 return PerlSIO_fileno(s);
2797 PerlIOStdio_mode(const char *mode, char *tmode)
2799 char * const ret = tmode;
2805 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2813 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2816 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2817 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2818 if (toptab == tab) {
2819 /* Top is already stdio - pop self (duplicate) and use original */
2820 PerlIO_pop(aTHX_ f);
2823 const int fd = PerlIO_fileno(n);
2826 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2827 mode = PerlIOStdio_mode(mode, tmode)))) {
2828 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2829 /* We never call down so do any pending stuff now */
2830 PerlIO_flush(PerlIONext(f));
2837 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2842 PerlIO_importFILE(FILE *stdio, const char *mode)
2848 if (!mode || !*mode) {
2849 /* We need to probe to see how we can open the stream
2850 so start with read/write and then try write and read
2851 we dup() so that we can fclose without loosing the fd.
2853 Note that the errno value set by a failing fdopen
2854 varies between stdio implementations.
2856 const int fd = PerlLIO_dup(fileno(stdio));
2857 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2859 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2862 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2865 /* Don't seem to be able to open */
2871 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2872 s = PerlIOSelf(f, PerlIOStdio);
2880 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2881 IV n, const char *mode, int fd, int imode,
2882 int perm, PerlIO *f, int narg, SV **args)
2885 if (PerlIOValid(f)) {
2886 const char * const path = SvPV_nolen_const(*args);
2887 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2889 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2890 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2895 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2900 const char * const path = SvPV_nolen_const(*args);
2901 if (*mode == IoTYPE_NUMERIC) {
2903 fd = PerlLIO_open3(path, imode, perm);
2907 bool appended = FALSE;
2909 /* Cygwin wants its 'b' early. */
2911 mode = PerlIOStdio_mode(mode, tmode);
2913 stdio = PerlSIO_fopen(path, mode);
2916 f = PerlIO_allocate(aTHX);
2919 mode = PerlIOStdio_mode(mode, tmode);
2920 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2922 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2923 PerlIOUnix_refcnt_inc(fileno(stdio));
2925 PerlSIO_fclose(stdio);
2937 if (*mode == IoTYPE_IMPLICIT) {
2944 stdio = PerlSIO_stdin;
2947 stdio = PerlSIO_stdout;
2950 stdio = PerlSIO_stderr;
2955 stdio = PerlSIO_fdopen(fd, mode =
2956 PerlIOStdio_mode(mode, tmode));
2960 f = PerlIO_allocate(aTHX);
2962 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2963 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2964 PerlIOUnix_refcnt_inc(fileno(stdio));
2974 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2976 /* This assumes no layers underneath - which is what
2977 happens, but is not how I remember it. NI-S 2001/10/16
2979 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2980 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2981 const int fd = fileno(stdio);
2983 if (flags & PERLIO_DUP_FD) {
2984 const int dfd = PerlLIO_dup(fileno(stdio));
2986 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2991 /* FIXME: To avoid messy error recovery if dup fails
2992 re-use the existing stdio as though flag was not set
2996 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2998 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2999 PerlIOUnix_refcnt_inc(fileno(stdio));
3005 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3007 PERL_UNUSED_CONTEXT;
3009 /* XXX this could use PerlIO_canset_fileno() and
3010 * PerlIO_set_fileno() support from Configure
3012 # if defined(__UCLIBC__)
3013 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3016 # elif defined(__GLIBC__)
3017 /* There may be a better way for GLIBC:
3018 - libio.h defines a flag to not close() on cleanup
3022 # elif defined(__sun__)
3025 # elif defined(__hpux)
3029 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3030 your platform does not have special entry try this one.
3031 [For OSF only have confirmation for Tru64 (alpha)
3032 but assume other OSFs will be similar.]
3034 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3037 # elif defined(__FreeBSD__)
3038 /* There may be a better way on FreeBSD:
3039 - we could insert a dummy func in the _close function entry
3040 f->_close = (int (*)(void *)) dummy_close;
3044 # elif defined(__OpenBSD__)
3045 /* There may be a better way on OpenBSD:
3046 - we could insert a dummy func in the _close function entry
3047 f->_close = (int (*)(void *)) dummy_close;
3051 # elif defined(__EMX__)
3052 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3055 # elif defined(__CYGWIN__)
3056 /* There may be a better way on CYGWIN:
3057 - we could insert a dummy func in the _close function entry
3058 f->_close = (int (*)(void *)) dummy_close;
3062 # elif defined(WIN32)
3063 # if defined(__BORLANDC__)
3064 f->fd = PerlLIO_dup(fileno(f));
3065 # elif defined(UNDER_CE)
3066 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3075 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3076 (which isn't thread safe) instead
3078 # error "Don't know how to set FILE.fileno on your platform"
3086 PerlIOStdio_close(pTHX_ PerlIO *f)
3088 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3094 const int fd = fileno(stdio);
3099 #ifdef SOCKS5_VERSION_NAME
3100 /* Socks lib overrides close() but stdio isn't linked to
3101 that library (though we are) - so we must call close()
3102 on sockets on stdio's behalf.
3105 Sock_size_t optlen = sizeof(int);
3106 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3109 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3112 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3113 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3115 if (stdio == stdout || stdio == stderr)
3116 return PerlIO_flush(f);
3117 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3118 Use Sarathy's trick from maint-5.6 to invalidate the
3119 fileno slot of the FILE *
3121 result = PerlIO_flush(f);
3123 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3125 dupfd = PerlLIO_dup(fd);
3127 result = PerlSIO_fclose(stdio);
3128 /* We treat error from stdio as success if we invalidated
3129 errno may NOT be expected EBADF
3131 if (invalidate && result != 0) {
3135 #ifdef SOCKS5_VERSION_NAME
3136 /* in SOCKS' case, let close() determine return value */
3140 PerlLIO_dup2(dupfd,fd);
3141 PerlLIO_close(dupfd);
3148 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3151 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3155 STDCHAR *buf = (STDCHAR *) vbuf;
3157 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3158 * stdio does not do that for fread()
3160 const int ch = PerlSIO_fgetc(s);
3167 got = PerlSIO_fread(vbuf, 1, count, s);
3168 if (got == 0 && PerlSIO_ferror(s))
3170 if (got >= 0 || errno != EINTR)
3173 SETERRNO(0,0); /* just in case */
3179 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3182 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3184 #ifdef STDIO_BUFFER_WRITABLE
3185 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3186 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3187 STDCHAR *base = PerlIO_get_base(f);
3188 SSize_t cnt = PerlIO_get_cnt(f);
3189 STDCHAR *ptr = PerlIO_get_ptr(f);
3190 SSize_t avail = ptr - base;
3192 if (avail > count) {
3196 Move(buf-avail,ptr,avail,STDCHAR);
3199 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3200 if (PerlSIO_feof(s) && unread >= 0)
3201 PerlSIO_clearerr(s);
3206 if (PerlIO_has_cntptr(f)) {
3207 /* We can get pointer to buffer but not its base
3208 Do ungetc() but check chars are ending up in the
3211 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3212 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3214 const int ch = *--buf & 0xFF;
3215 if (ungetc(ch,s) != ch) {
3216 /* ungetc did not work */
3219 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3220 /* Did not change pointer as expected */
3221 fgetc(s); /* get char back again */
3231 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3237 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3242 got = PerlSIO_fwrite(vbuf, 1, count,
3243 PerlIOSelf(f, PerlIOStdio)->stdio);
3244 if (got >= 0 || errno != EINTR)
3247 SETERRNO(0,0); /* just in case */
3253 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3255 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3256 PERL_UNUSED_CONTEXT;
3258 return PerlSIO_fseek(stdio, offset, whence);
3262 PerlIOStdio_tell(pTHX_ PerlIO *f)
3264 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3265 PERL_UNUSED_CONTEXT;
3267 return PerlSIO_ftell(stdio);
3271 PerlIOStdio_flush(pTHX_ PerlIO *f)
3273 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3274 PERL_UNUSED_CONTEXT;
3276 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3277 return PerlSIO_fflush(stdio);
3283 * FIXME: This discards ungetc() and pre-read stuff which is not
3284 * right if this is just a "sync" from a layer above Suspect right
3285 * design is to do _this_ but not have layer above flush this
3286 * layer read-to-read
3289 * Not writeable - sync by attempting a seek
3291 const int err = errno;
3292 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3300 PerlIOStdio_eof(pTHX_ PerlIO *f)
3302 PERL_UNUSED_CONTEXT;
3304 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3308 PerlIOStdio_error(pTHX_ PerlIO *f)
3310 PERL_UNUSED_CONTEXT;
3312 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3316 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3318 PERL_UNUSED_CONTEXT;
3320 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3324 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3326 PERL_UNUSED_CONTEXT;
3328 #ifdef HAS_SETLINEBUF
3329 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3331 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3337 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3339 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3340 return (STDCHAR*)PerlSIO_get_base(stdio);
3344 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3346 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3347 return PerlSIO_get_bufsiz(stdio);
3351 #ifdef USE_STDIO_PTR
3353 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3355 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3356 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3360 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3362 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3363 return PerlSIO_get_cnt(stdio);
3367 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3369 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3371 #ifdef STDIO_PTR_LVALUE
3372 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3373 #ifdef STDIO_PTR_LVAL_SETS_CNT
3374 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3375 assert(PerlSIO_get_cnt(stdio) == (cnt));
3378 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3380 * Setting ptr _does_ change cnt - we are done
3384 #else /* STDIO_PTR_LVALUE */
3386 #endif /* STDIO_PTR_LVALUE */
3389 * Now (or only) set cnt
3391 #ifdef STDIO_CNT_LVALUE
3392 PerlSIO_set_cnt(stdio, cnt);
3393 #else /* STDIO_CNT_LVALUE */
3394 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3395 PerlSIO_set_ptr(stdio,
3396 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3398 #else /* STDIO_PTR_LVAL_SETS_CNT */
3400 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3401 #endif /* STDIO_CNT_LVALUE */
3408 PerlIOStdio_fill(pTHX_ PerlIO *f)
3410 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3412 PERL_UNUSED_CONTEXT;
3415 * fflush()ing read-only streams can cause trouble on some stdio-s
3417 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3418 if (PerlSIO_fflush(stdio) != 0)
3421 c = PerlSIO_fgetc(stdio);
3425 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3427 #ifdef STDIO_BUFFER_WRITABLE
3428 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3429 /* Fake ungetc() to the real buffer in case system's ungetc
3432 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3433 SSize_t cnt = PerlSIO_get_cnt(stdio);
3434 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3435 if (ptr == base+1) {
3436 *--ptr = (STDCHAR) c;
3437 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3438 if (PerlSIO_feof(stdio))
3439 PerlSIO_clearerr(stdio);
3445 if (PerlIO_has_cntptr(f)) {
3447 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3454 /* An ungetc()d char is handled separately from the regular
3455 * buffer, so we stuff it in the buffer ourselves.
3456 * Should never get called as should hit code above
3458 *(--((*stdio)->_ptr)) = (unsigned char) c;
3461 /* If buffer snoop scheme above fails fall back to
3464 if (PerlSIO_ungetc(c, stdio) != c)
3472 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3473 sizeof(PerlIO_funcs),
3475 sizeof(PerlIOStdio),
3476 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3480 PerlIOBase_binmode, /* binmode */
3494 PerlIOStdio_clearerr,
3495 PerlIOStdio_setlinebuf,
3497 PerlIOStdio_get_base,
3498 PerlIOStdio_get_bufsiz,
3503 #ifdef USE_STDIO_PTR
3504 PerlIOStdio_get_ptr,
3505 PerlIOStdio_get_cnt,
3506 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3507 PerlIOStdio_set_ptrcnt,
3510 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3515 #endif /* USE_STDIO_PTR */
3518 /* Note that calls to PerlIO_exportFILE() are reversed using
3519 * PerlIO_releaseFILE(), not importFILE. */
3521 PerlIO_exportFILE(PerlIO * f, const char *mode)
3525 if (PerlIOValid(f)) {
3528 if (!mode || !*mode) {
3529 mode = PerlIO_modestr(f, buf);
3531 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3535 /* De-link any lower layers so new :stdio sticks */
3537 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3538 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3540 /* Link previous lower layers under new one */
3544 /* restore layers list */
3554 PerlIO_findFILE(PerlIO *f)
3558 if (l->tab == &PerlIO_stdio) {
3559 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3562 l = *PerlIONext(&l);
3564 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3565 return PerlIO_exportFILE(f, NULL);
3568 /* Use this to reverse PerlIO_exportFILE calls. */
3570 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3575 if (l->tab == &PerlIO_stdio) {
3576 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3577 if (s->stdio == f) {
3579 PerlIO_pop(aTHX_ p);
3588 /*--------------------------------------------------------------------------------------*/
3590 * perlio buffer layer
3594 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3596 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3597 const int fd = PerlIO_fileno(f);
3598 if (fd >= 0 && PerlLIO_isatty(fd)) {
3599 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3601 if (*PerlIONext(f)) {
3602 const Off_t posn = PerlIO_tell(PerlIONext(f));
3603 if (posn != (Off_t) - 1) {
3607 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3611 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3612 IV n, const char *mode, int fd, int imode, int perm,
3613 PerlIO *f, int narg, SV **args)
3615 if (PerlIOValid(f)) {
3616 PerlIO *next = PerlIONext(f);
3618 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3619 if (tab && tab->Open)
3621 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3623 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3628 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3630 if (*mode == IoTYPE_IMPLICIT) {
3636 if (tab && tab->Open)
3637 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3640 SETERRNO(EINVAL, LIB_INVARG);
3642 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3644 * if push fails during open, open fails. close will pop us.
3649 fd = PerlIO_fileno(f);
3650 if (init && fd == 2) {
3652 * Initial stderr is unbuffered
3654 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3656 #ifdef PERLIO_USING_CRLF
3657 # ifdef PERLIO_IS_BINMODE_FD
3658 if (PERLIO_IS_BINMODE_FD(fd))
3659 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3663 * do something about failing setmode()? --jhi
3665 PerlLIO_setmode(fd, O_BINARY);
3674 * This "flush" is akin to sfio's sync in that it handles files in either
3675 * read or write state. For write state, we put the postponed data through
3676 * the next layers. For read state, we seek() the next layers to the
3677 * offset given by current position in the buffer, and discard the buffer
3678 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3679 * in any case?). Then the pass the stick further in chain.
3682 PerlIOBuf_flush(pTHX_ PerlIO *f)
3684 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3686 PerlIO *n = PerlIONext(f);
3687 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3689 * write() the buffer
3691 const STDCHAR *buf = b->buf;
3692 const STDCHAR *p = buf;
3693 while (p < b->ptr) {
3694 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3698 else if (count < 0 || PerlIO_error(n)) {
3699 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3704 b->posn += (p - buf);
3706 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3707 STDCHAR *buf = PerlIO_get_base(f);
3709 * Note position change
3711 b->posn += (b->ptr - buf);
3712 if (b->ptr < b->end) {
3713 /* We did not consume all of it - try and seek downstream to
3714 our logical position
3716 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3717 /* Reload n as some layers may pop themselves on seek */
3718 b->posn = PerlIO_tell(n = PerlIONext(f));
3721 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3722 data is lost for good - so return saying "ok" having undone
3725 b->posn -= (b->ptr - buf);
3730 b->ptr = b->end = b->buf;
3731 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3732 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3733 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3738 /* This discards the content of the buffer after b->ptr, and rereads
3739 * the buffer from the position off in the layer downstream; here off
3740 * is at offset corresponding to b->ptr - b->buf.
3743 PerlIOBuf_fill(pTHX_ PerlIO *f)
3745 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3746 PerlIO *n = PerlIONext(f);
3749 * Down-stream flush is defined not to loose read data so is harmless.
3750 * we would not normally be fill'ing if there was data left in anycase.
3752 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3754 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3755 PerlIOBase_flush_linebuf(aTHX);
3758 PerlIO_get_base(f); /* allocate via vtable */
3760 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3762 b->ptr = b->end = b->buf;
3764 if (!PerlIOValid(n)) {
3765 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3769 if (PerlIO_fast_gets(n)) {
3771 * Layer below is also buffered. We do _NOT_ want to call its
3772 * ->Read() because that will loop till it gets what we asked for
3773 * which may hang on a pipe etc. Instead take anything it has to
3774 * hand, or ask it to fill _once_.
3776 avail = PerlIO_get_cnt(n);
3778 avail = PerlIO_fill(n);
3780 avail = PerlIO_get_cnt(n);
3782 if (!PerlIO_error(n) && PerlIO_eof(n))
3787 STDCHAR *ptr = PerlIO_get_ptr(n);
3788 const SSize_t cnt = avail;
3789 if (avail > (SSize_t)b->bufsiz)
3791 Copy(ptr, b->buf, avail, STDCHAR);
3792 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3796 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3800 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3802 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3805 b->end = b->buf + avail;
3806 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3811 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3813 if (PerlIOValid(f)) {
3814 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3817 return PerlIOBase_read(aTHX_ f, vbuf, count);
3823 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3825 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3826 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3829 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3834 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3836 * Buffer is already a read buffer, we can overwrite any chars
3837 * which have been read back to buffer start
3839 avail = (b->ptr - b->buf);
3843 * Buffer is idle, set it up so whole buffer is available for
3847 b->end = b->buf + avail;
3849 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3851 * Buffer extends _back_ from where we are now
3853 b->posn -= b->bufsiz;
3855 if (avail > (SSize_t) count) {
3857 * If we have space for more than count, just move count
3865 * In simple stdio-like ungetc() case chars will be already
3868 if (buf != b->ptr) {
3869 Copy(buf, b->ptr, avail, STDCHAR);
3873 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3877 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3883 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3885 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3886 const STDCHAR *buf = (const STDCHAR *) vbuf;
3887 const STDCHAR *flushptr = buf;
3891 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3893 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3894 if (PerlIO_flush(f) != 0) {
3898 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3899 flushptr = buf + count;
3900 while (flushptr > buf && *(flushptr - 1) != '\n')
3904 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3905 if ((SSize_t) count < avail)
3907 if (flushptr > buf && flushptr <= buf + avail)
3908 avail = flushptr - buf;
3909 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3911 Copy(buf, b->ptr, avail, STDCHAR);
3916 if (buf == flushptr)
3919 if (b->ptr >= (b->buf + b->bufsiz))
3922 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3928 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3931 if ((code = PerlIO_flush(f)) == 0) {
3932 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3933 code = PerlIO_seek(PerlIONext(f), offset, whence);
3935 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3936 b->posn = PerlIO_tell(PerlIONext(f));
3943 PerlIOBuf_tell(pTHX_ PerlIO *f)
3945 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3947 * b->posn is file position where b->buf was read, or will be written
3949 Off_t posn = b->posn;
3950 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3951 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3953 /* As O_APPEND files are normally shared in some sense it is better
3958 /* when file is NOT shared then this is sufficient */
3959 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3961 posn = b->posn = PerlIO_tell(PerlIONext(f));
3965 * If buffer is valid adjust position by amount in buffer
3967 posn += (b->ptr - b->buf);
3973 PerlIOBuf_popped(pTHX_ PerlIO *f)
3975 const IV code = PerlIOBase_popped(aTHX_ f);
3976 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3977 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3980 b->ptr = b->end = b->buf = NULL;
3981 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3986 PerlIOBuf_close(pTHX_ PerlIO *f)
3988 const IV code = PerlIOBase_close(aTHX_ f);
3989 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3990 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3993 b->ptr = b->end = b->buf = NULL;
3994 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3999 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
4001 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4008 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4010 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4013 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4014 return (b->end - b->ptr);
4019 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4021 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4022 PERL_UNUSED_CONTEXT;
4027 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
4029 b->buf = (STDCHAR *) & b->oneword;
4030 b->bufsiz = sizeof(b->oneword);
4032 b->end = b->ptr = b->buf;
4038 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4040 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4043 return (b->end - b->buf);
4047 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4049 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4053 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4054 assert(PerlIO_get_cnt(f) == cnt);
4055 assert(b->ptr >= b->buf);
4057 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4061 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4063 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4068 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4069 sizeof(PerlIO_funcs),
4072 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4076 PerlIOBase_binmode, /* binmode */
4090 PerlIOBase_clearerr,
4091 PerlIOBase_setlinebuf,
4096 PerlIOBuf_set_ptrcnt,
4099 /*--------------------------------------------------------------------------------------*/
4101 * Temp layer to hold unread chars when cannot do it any other way
4105 PerlIOPending_fill(pTHX_ PerlIO *f)
4108 * Should never happen
4115 PerlIOPending_close(pTHX_ PerlIO *f)
4118 * A tad tricky - flush pops us, then we close new top
4121 return PerlIO_close(f);
4125 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4128 * A tad tricky - flush pops us, then we seek new top
4131 return PerlIO_seek(f, offset, whence);
4136 PerlIOPending_flush(pTHX_ PerlIO *f)
4138 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4139 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4143 PerlIO_pop(aTHX_ f);
4148 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4154 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4159 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4161 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4162 PerlIOl * const l = PerlIOBase(f);
4164 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4165 * etc. get muddled when it changes mid-string when we auto-pop.
4167 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4168 (PerlIOBase(PerlIONext(f))->
4169 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4174 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4176 SSize_t avail = PerlIO_get_cnt(f);
4178 if ((SSize_t)count < avail)
4181 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4182 if (got >= 0 && got < (SSize_t)count) {
4183 const SSize_t more =
4184 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4185 if (more >= 0 || got == 0)
4191 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4192 sizeof(PerlIO_funcs),
4195 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4196 PerlIOPending_pushed,
4199 PerlIOBase_binmode, /* binmode */
4208 PerlIOPending_close,
4209 PerlIOPending_flush,
4213 PerlIOBase_clearerr,
4214 PerlIOBase_setlinebuf,
4219 PerlIOPending_set_ptrcnt,
4224 /*--------------------------------------------------------------------------------------*/
4226 * crlf - translation On read translate CR,LF to "\n" we do this by
4227 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4228 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4230 * c->nl points on the first byte of CR LF pair when it is temporarily
4231 * replaced by LF, or to the last CR of the buffer. In the former case
4232 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4233 * that it ends at c->nl; these two cases can be distinguished by
4234 * *c->nl. c->nl is set during _getcnt() call, and unset during
4235 * _unread() and _flush() calls.
4236 * It only matters for read operations.
4240 PerlIOBuf base; /* PerlIOBuf stuff */
4241 STDCHAR *nl; /* Position of crlf we "lied" about in the
4245 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4246 * Otherwise the :crlf layer would always revert back to
4250 S_inherit_utf8_flag(PerlIO *f)
4252 PerlIO *g = PerlIONext(f);
4253 if (PerlIOValid(g)) {
4254 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4255 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4261 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4264 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4265 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4267 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4268 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4269 PerlIOBase(f)->flags);
4272 /* Enable the first CRLF capable layer you can find, but if none
4273 * found, the one we just pushed is fine. This results in at
4274 * any given moment at most one CRLF-capable layer being enabled
4275 * in the whole layer stack. */
4276 PerlIO *g = PerlIONext(f);
4277 while (PerlIOValid(g)) {
4278 PerlIOl *b = PerlIOBase(g);
4279 if (b && b->tab == &PerlIO_crlf) {
4280 if (!(b->flags & PERLIO_F_CRLF))
4281 b->flags |= PERLIO_F_CRLF;
4282 S_inherit_utf8_flag(g);
4283 PerlIO_pop(aTHX_ f);
4289 S_inherit_utf8_flag(f);
4295 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4297 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4298 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4302 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4303 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4305 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4306 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4308 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4313 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4314 b->end = b->ptr = b->buf + b->bufsiz;
4315 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4316 b->posn -= b->bufsiz;
4318 while (count > 0 && b->ptr > b->buf) {
4319 const int ch = *--buf;
4321 if (b->ptr - 2 >= b->buf) {
4328 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4329 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4345 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4347 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4349 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4352 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4353 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4354 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4355 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4357 while (nl < b->end && *nl != 0xd)
4359 if (nl < b->end && *nl == 0xd) {
4361 if (nl + 1 < b->end) {
4368 * Not CR,LF but just CR
4376 * Blast - found CR as last char in buffer
4381 * They may not care, defer work as long as
4385 return (nl - b->ptr);
4389 b->ptr++; /* say we have read it as far as
4390 * flush() is concerned */
4391 b->buf++; /* Leave space in front of buffer */
4392 /* Note as we have moved buf up flush's
4394 will naturally make posn point at CR
4396 b->bufsiz--; /* Buffer is thus smaller */
4397 code = PerlIO_fill(f); /* Fetch some more */
4398 b->bufsiz++; /* Restore size for next time */
4399 b->buf--; /* Point at space */
4400 b->ptr = nl = b->buf; /* Which is what we hand
4402 *nl = 0xd; /* Fill in the CR */
4404 goto test; /* fill() call worked */
4406 * CR at EOF - just fall through
4408 /* Should we clear EOF though ??? */
4413 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4419 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4421 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4422 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4428 if (ptr == b->end && *c->nl == 0xd) {
4429 /* Defered CR at end of buffer case - we lied about count */
4442 * Test code - delete when it works ...
4444 IV flags = PerlIOBase(f)->flags;
4445 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4446 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4447 /* Defered CR at end of buffer case - we lied about count */
4453 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4454 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4462 * They have taken what we lied about
4470 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4474 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4476 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4477 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4479 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4480 const STDCHAR *buf = (const STDCHAR *) vbuf;
4481 const STDCHAR * const ebuf = buf + count;
4484 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4486 while (buf < ebuf) {
4487 const STDCHAR * const eptr = b->buf + b->bufsiz;
4488 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4489 while (buf < ebuf && b->ptr < eptr) {
4491 if ((b->ptr + 2) > eptr) {
4499 *(b->ptr)++ = 0xd; /* CR */
4500 *(b->ptr)++ = 0xa; /* LF */
4502 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4509 *(b->ptr)++ = *buf++;
4511 if (b->ptr >= eptr) {
4517 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4519 return (buf - (STDCHAR *) vbuf);
4524 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4526 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4531 return PerlIOBuf_flush(aTHX_ f);
4535 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4537 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4538 /* In text mode - flush any pending stuff and flip it */
4539 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4540 #ifndef PERLIO_USING_CRLF
4541 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4542 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4543 PerlIO_pop(aTHX_ f);
4550 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4551 sizeof(PerlIO_funcs),
4554 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4556 PerlIOBuf_popped, /* popped */
4558 PerlIOCrlf_binmode, /* binmode */
4562 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4563 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4564 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4572 PerlIOBase_clearerr,
4573 PerlIOBase_setlinebuf,
4578 PerlIOCrlf_set_ptrcnt,
4582 /*--------------------------------------------------------------------------------------*/
4584 * mmap as "buffer" layer
4588 PerlIOBuf base; /* PerlIOBuf stuff */
4589 Mmap_t mptr; /* Mapped address */
4590 Size_t len; /* mapped length */
4591 STDCHAR *bbuf; /* malloced buffer if map fails */
4595 PerlIOMmap_map(pTHX_ PerlIO *f)
4598 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4599 const IV flags = PerlIOBase(f)->flags;
4603 if (flags & PERLIO_F_CANREAD) {
4604 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4605 const int fd = PerlIO_fileno(f);
4607 code = Fstat(fd, &st);
4608 if (code == 0 && S_ISREG(st.st_mode)) {
4609 SSize_t len = st.st_size - b->posn;
4612 if (PL_mmap_page_size <= 0)
4613 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4617 * This is a hack - should never happen - open should
4620 b->posn = PerlIO_tell(PerlIONext(f));
4622 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4623 len = st.st_size - posn;
4624 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4625 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4626 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4627 madvise(m->mptr, len, MADV_SEQUENTIAL);
4629 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4630 madvise(m->mptr, len, MADV_WILLNEED);
4632 PerlIOBase(f)->flags =
4633 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4634 b->end = ((STDCHAR *) m->mptr) + len;
4635 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4644 PerlIOBase(f)->flags =
4645 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4647 b->ptr = b->end = b->ptr;
4656 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4658 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4661 PerlIOBuf * const b = &m->base;
4663 /* The munmap address argument is tricky: depending on the
4664 * standard it is either "void *" or "caddr_t" (which is
4665 * usually "char *" (signed or unsigned). If we cast it
4666 * to "void *", those that have it caddr_t and an uptight
4667 * C++ compiler, will freak out. But casting it as char*
4668 * should work. Maybe. (Using Mmap_t figured out by
4669 * Configure doesn't always work, apparently.) */
4670 code = munmap((char*)m->mptr, m->len);
4674 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4677 b->ptr = b->end = b->buf;
4678 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4684 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4686 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4687 PerlIOBuf * const b = &m->base;
4688 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4690 * Already have a readbuffer in progress
4696 * We have a write buffer or flushed PerlIOBuf read buffer
4698 m->bbuf = b->buf; /* save it in case we need it again */
4699 b->buf = NULL; /* Clear to trigger below */
4702 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4705 * Map did not work - recover PerlIOBuf buffer if we have one
4710 b->ptr = b->end = b->buf;
4713 return PerlIOBuf_get_base(aTHX_ f);
4717 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4719 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4720 PerlIOBuf * const b = &m->base;
4721 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4723 if (b->ptr && (b->ptr - count) >= b->buf
4724 && memEQ(b->ptr - count, vbuf, count)) {
4726 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4731 * Loose the unwritable mapped buffer
4735 * If flush took the "buffer" see if we have one from before
4737 if (!b->buf && m->bbuf)
4740 PerlIOBuf_get_base(aTHX_ f);
4744 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4748 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4750 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4751 PerlIOBuf * const b = &m->base;
4753 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4755 * No, or wrong sort of, buffer
4758 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4762 * If unmap took the "buffer" see if we have one from before
4764 if (!b->buf && m->bbuf)
4767 PerlIOBuf_get_base(aTHX_ f);
4771 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4775 PerlIOMmap_flush(pTHX_ PerlIO *f)
4777 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4778 PerlIOBuf * const b = &m->base;
4779 IV code = PerlIOBuf_flush(aTHX_ f);
4781 * Now we are "synced" at PerlIOBuf level
4788 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4793 * We seem to have a PerlIOBuf buffer which was not mapped
4794 * remember it in case we need one later
4803 PerlIOMmap_fill(pTHX_ PerlIO *f)
4805 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4806 IV code = PerlIO_flush(f);
4807 if (code == 0 && !b->buf) {
4808 code = PerlIOMmap_map(aTHX_ f);
4810 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4811 code = PerlIOBuf_fill(aTHX_ f);
4817 PerlIOMmap_close(pTHX_ PerlIO *f)
4819 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4820 PerlIOBuf * const b = &m->base;
4821 IV code = PerlIO_flush(f);
4825 b->ptr = b->end = b->buf;
4827 if (PerlIOBuf_close(aTHX_ f) != 0)
4833 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4835 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4839 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4840 sizeof(PerlIO_funcs),
4843 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4847 PerlIOBase_binmode, /* binmode */
4861 PerlIOBase_clearerr,
4862 PerlIOBase_setlinebuf,
4863 PerlIOMmap_get_base,
4867 PerlIOBuf_set_ptrcnt,
4870 #endif /* HAS_MMAP */
4873 Perl_PerlIO_stdin(pTHX)
4877 PerlIO_stdstreams(aTHX);
4879 return &PL_perlio[1];
4883 Perl_PerlIO_stdout(pTHX)
4887 PerlIO_stdstreams(aTHX);
4889 return &PL_perlio[2];
4893 Perl_PerlIO_stderr(pTHX)
4897 PerlIO_stdstreams(aTHX);
4899 return &PL_perlio[3];
4902 /*--------------------------------------------------------------------------------------*/
4905 PerlIO_getname(PerlIO *f, char *buf)
4910 bool exported = FALSE;
4911 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4913 stdio = PerlIO_exportFILE(f,0);
4917 name = fgetname(stdio, buf);
4918 if (exported) PerlIO_releaseFILE(f,stdio);
4923 PERL_UNUSED_ARG(buf);
4924 Perl_croak(aTHX_ "Don't know how to get file name");
4930 /*--------------------------------------------------------------------------------------*/
4932 * Functions which can be called on any kind of PerlIO implemented in
4936 #undef PerlIO_fdopen
4938 PerlIO_fdopen(int fd, const char *mode)
4941 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4946 PerlIO_open(const char *path, const char *mode)
4949 SV *name = sv_2mortal(newSVpv(path, 0));
4950 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4953 #undef Perlio_reopen
4955 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4958 SV *name = sv_2mortal(newSVpv(path,0));
4959 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4964 PerlIO_getc(PerlIO *f)
4968 if ( 1 == PerlIO_read(f, buf, 1) ) {
4969 return (unsigned char) buf[0];
4974 #undef PerlIO_ungetc
4976 PerlIO_ungetc(PerlIO *f, int ch)
4981 if (PerlIO_unread(f, &buf, 1) == 1)
4989 PerlIO_putc(PerlIO *f, int ch)
4993 return PerlIO_write(f, &buf, 1);
4998 PerlIO_puts(PerlIO *f, const char *s)
5001 return PerlIO_write(f, s, strlen(s));
5004 #undef PerlIO_rewind
5006 PerlIO_rewind(PerlIO *f)
5009 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
5013 #undef PerlIO_vprintf
5015 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
5018 SV * const sv = newSVpvs("");
5024 Perl_va_copy(ap, apc);
5025 sv_vcatpvf(sv, fmt, &apc);
5027 sv_vcatpvf(sv, fmt, &ap);
5029 s = SvPV_const(sv, len);
5030 wrote = PerlIO_write(f, s, len);
5035 #undef PerlIO_printf
5037 PerlIO_printf(PerlIO *f, const char *fmt, ...)
5042 result = PerlIO_vprintf(f, fmt, ap);
5047 #undef PerlIO_stdoutf
5049 PerlIO_stdoutf(const char *fmt, ...)
5055 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5060 #undef PerlIO_tmpfile
5062 PerlIO_tmpfile(void)
5067 const int fd = win32_tmpfd();
5069 f = PerlIO_fdopen(fd, "w+b");
5071 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5072 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5074 * I have no idea how portable mkstemp() is ... NI-S
5076 const int fd = mkstemp(SvPVX(sv));
5078 f = PerlIO_fdopen(fd, "w+");
5080 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5081 PerlLIO_unlink(SvPVX_const(sv));
5084 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5085 FILE * const stdio = PerlSIO_tmpfile();
5088 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)),
5089 PERLIO_FUNCS_CAST(&PerlIO_stdio),
5091 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
5097 # endif /* else HAS_MKSTEMP */
5098 #endif /* else WIN32 */
5105 #endif /* USE_SFIO */
5106 #endif /* PERLIO_IS_STDIO */
5108 /*======================================================================================*/
5110 * Now some functions in terms of above which may be needed even if we are
5111 * not in true PerlIO mode
5114 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5117 const char *type = NULL;
5119 * Need to supply default layer info from open.pm
5121 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5123 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5128 type = SvPV_const(layers, len);
5129 if (type && mode && mode[0] != 'r') {
5131 * Skip to write part, which is separated by a '\0'
5133 STRLEN read_len = strlen(type);
5134 if (read_len < len) {
5135 type += read_len + 1;
5145 #undef PerlIO_setpos
5147 PerlIO_setpos(PerlIO *f, SV *pos)
5152 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5153 if (f && len == sizeof(Off_t))
5154 return PerlIO_seek(f, *posn, SEEK_SET);
5156 SETERRNO(EINVAL, SS_IVCHAN);
5160 #undef PerlIO_setpos
5162 PerlIO_setpos(PerlIO *f, SV *pos)
5167 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5168 if (f && len == sizeof(Fpos_t)) {
5169 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5170 return fsetpos64(f, fpos);
5172 return fsetpos(f, fpos);
5176 SETERRNO(EINVAL, SS_IVCHAN);
5182 #undef PerlIO_getpos
5184 PerlIO_getpos(PerlIO *f, SV *pos)
5187 Off_t posn = PerlIO_tell(f);
5188 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5189 return (posn == (Off_t) - 1) ? -1 : 0;
5192 #undef PerlIO_getpos
5194 PerlIO_getpos(PerlIO *f, SV *pos)
5199 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5200 code = fgetpos64(f, &fpos);
5202 code = fgetpos(f, &fpos);
5204 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5209 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5212 vprintf(char *pat, char *args)
5214 _doprnt(pat, args, stdout);
5215 return 0; /* wrong, but perl doesn't use the return
5220 vfprintf(FILE *fd, char *pat, char *args)
5222 _doprnt(pat, args, fd);
5223 return 0; /* wrong, but perl doesn't use the return
5229 #ifndef PerlIO_vsprintf
5231 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5234 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5235 PERL_UNUSED_CONTEXT;
5237 #ifndef PERL_MY_VSNPRINTF_GUARDED
5238 if (val < 0 || (n > 0 ? val >= n : 0)) {
5239 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5246 #ifndef PerlIO_sprintf
5248 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5253 result = PerlIO_vsprintf(s, n, fmt, ap);
5261 * c-indentation-style: bsd
5263 * indent-tabs-mode: t
5266 * ex: set ts=8 sts=4 sw=4 noet: