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 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1436 /* This isn't supposed to happen, since PerlIO::scalar is core,
1437 * but could happen anyway in smaller installs or with PAR */
1438 if (!f && ckWARN(WARN_LAYER))
1439 Perl_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1444 * For other types allow if layer is known but don't try and load it
1446 switch (SvTYPE(sv)) {
1448 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1450 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1452 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1454 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1461 PerlIO_resolve_layers(pTHX_ const char *layers,
1462 const char *mode, int narg, SV **args)
1465 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1468 PerlIO_stdstreams(aTHX);
1470 SV * const arg = *args;
1472 * If it is a reference but not an object see if we have a handler
1475 if (SvROK(arg) && !sv_isobject(arg)) {
1476 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1478 def = PerlIO_list_alloc(aTHX);
1479 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1483 * Don't fail if handler cannot be found :via(...) etc. may do
1484 * something sensible else we will just stringfy and open
1489 if (!layers || !*layers)
1490 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1491 if (layers && *layers) {
1495 av = PerlIO_list_alloc(aTHX);
1496 for (i = 0; i < def->cur; i++) {
1497 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1504 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1508 PerlIO_list_free(aTHX_ av);
1520 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1521 int imode, int perm, PerlIO *f, int narg, SV **args)
1524 if (!f && narg == 1 && *args == &PL_sv_undef) {
1525 if ((f = PerlIO_tmpfile())) {
1526 if (!layers || !*layers)
1527 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1528 if (layers && *layers)
1529 PerlIO_apply_layers(aTHX_ f, mode, layers);
1533 PerlIO_list_t *layera;
1535 PerlIO_funcs *tab = NULL;
1536 if (PerlIOValid(f)) {
1538 * This is "reopen" - it is not tested as perl does not use it
1542 layera = PerlIO_list_alloc(aTHX);
1544 SV * const arg = (l->tab->Getarg)
1545 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1547 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1548 l = *PerlIONext(&l);
1552 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1558 * Start at "top" of layer stack
1560 n = layera->cur - 1;
1562 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1571 * Found that layer 'n' can do opens - call it
1573 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1574 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1576 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1577 tab->name, layers ? layers : "(Null)", mode, fd,
1578 imode, perm, (void*)f, narg, (void*)args);
1580 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1583 SETERRNO(EINVAL, LIB_INVARG);
1587 if (n + 1 < layera->cur) {
1589 * More layers above the one that we used to open -
1592 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1593 /* If pushing layers fails close the file */
1600 PerlIO_list_free(aTHX_ layera);
1607 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1609 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1613 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1615 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1619 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1621 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1625 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1627 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1631 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1633 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1637 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1642 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1644 if (tab && tab->Flush)
1645 return (*tab->Flush) (aTHX_ f);
1647 return 0; /* If no Flush defined, silently succeed. */
1650 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1651 SETERRNO(EBADF, SS_IVCHAN);
1657 * Is it good API design to do flush-all on NULL, a potentially
1658 * errorneous input? Maybe some magical value (PerlIO*
1659 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1660 * things on fflush(NULL), but should we be bound by their design
1663 PerlIO **table = &PL_perlio;
1665 while ((f = *table)) {
1667 table = (PerlIO **) (f++);
1668 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1669 if (*f && PerlIO_flush(f) != 0)
1679 PerlIOBase_flush_linebuf(pTHX)
1682 PerlIO **table = &PL_perlio;
1684 while ((f = *table)) {
1686 table = (PerlIO **) (f++);
1687 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1690 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1691 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1699 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1701 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1705 PerlIO_isutf8(PerlIO *f)
1708 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1710 SETERRNO(EBADF, SS_IVCHAN);
1716 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1718 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1722 Perl_PerlIO_error(pTHX_ PerlIO *f)
1724 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1728 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1730 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1734 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1736 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1740 PerlIO_has_base(PerlIO *f)
1742 if (PerlIOValid(f)) {
1743 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1746 return (tab->Get_base != NULL);
1747 SETERRNO(EINVAL, LIB_INVARG);
1750 SETERRNO(EBADF, SS_IVCHAN);
1756 PerlIO_fast_gets(PerlIO *f)
1758 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1759 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1762 return (tab->Set_ptrcnt != NULL);
1763 SETERRNO(EINVAL, LIB_INVARG);
1766 SETERRNO(EBADF, SS_IVCHAN);
1772 PerlIO_has_cntptr(PerlIO *f)
1774 if (PerlIOValid(f)) {
1775 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1778 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1779 SETERRNO(EINVAL, LIB_INVARG);
1782 SETERRNO(EBADF, SS_IVCHAN);
1788 PerlIO_canset_cnt(PerlIO *f)
1790 if (PerlIOValid(f)) {
1791 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1794 return (tab->Set_ptrcnt != NULL);
1795 SETERRNO(EINVAL, LIB_INVARG);
1798 SETERRNO(EBADF, SS_IVCHAN);
1804 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1806 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1810 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1812 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1816 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1818 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1822 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1824 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1828 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1830 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1834 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1836 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1840 /*--------------------------------------------------------------------------------------*/
1842 * utf8 and raw dummy layers
1846 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1848 PERL_UNUSED_CONTEXT;
1849 PERL_UNUSED_ARG(mode);
1850 PERL_UNUSED_ARG(arg);
1851 if (PerlIOValid(f)) {
1852 if (tab->kind & PERLIO_K_UTF8)
1853 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1855 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1861 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1862 sizeof(PerlIO_funcs),
1865 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1885 NULL, /* get_base */
1886 NULL, /* get_bufsiz */
1889 NULL, /* set_ptrcnt */
1892 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1893 sizeof(PerlIO_funcs),
1916 NULL, /* get_base */
1917 NULL, /* get_bufsiz */
1920 NULL, /* set_ptrcnt */
1924 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1925 IV n, const char *mode, int fd, int imode, int perm,
1926 PerlIO *old, int narg, SV **args)
1928 PerlIO_funcs * const tab = PerlIO_default_btm();
1929 PERL_UNUSED_ARG(self);
1930 if (tab && tab->Open)
1931 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1933 SETERRNO(EINVAL, LIB_INVARG);
1937 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1938 sizeof(PerlIO_funcs),
1961 NULL, /* get_base */
1962 NULL, /* get_bufsiz */
1965 NULL, /* set_ptrcnt */
1967 /*--------------------------------------------------------------------------------------*/
1968 /*--------------------------------------------------------------------------------------*/
1970 * "Methods" of the "base class"
1974 PerlIOBase_fileno(pTHX_ PerlIO *f)
1976 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1980 PerlIO_modestr(PerlIO * f, char *buf)
1983 if (PerlIOValid(f)) {
1984 const IV flags = PerlIOBase(f)->flags;
1985 if (flags & PERLIO_F_APPEND) {
1987 if (flags & PERLIO_F_CANREAD) {
1991 else if (flags & PERLIO_F_CANREAD) {
1993 if (flags & PERLIO_F_CANWRITE)
1996 else if (flags & PERLIO_F_CANWRITE) {
1998 if (flags & PERLIO_F_CANREAD) {
2002 #ifdef PERLIO_USING_CRLF
2003 if (!(flags & PERLIO_F_CRLF))
2013 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2015 PerlIOl * const l = PerlIOBase(f);
2016 PERL_UNUSED_CONTEXT;
2017 PERL_UNUSED_ARG(arg);
2019 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
2020 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2021 if (tab->Set_ptrcnt != NULL)
2022 l->flags |= PERLIO_F_FASTGETS;
2024 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2028 l->flags |= PERLIO_F_CANREAD;
2031 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2034 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2037 SETERRNO(EINVAL, LIB_INVARG);
2043 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2046 l->flags &= ~PERLIO_F_CRLF;
2049 l->flags |= PERLIO_F_CRLF;
2052 SETERRNO(EINVAL, LIB_INVARG);
2059 l->flags |= l->next->flags &
2060 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2065 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2066 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2067 l->flags, PerlIO_modestr(f, temp));
2073 PerlIOBase_popped(pTHX_ PerlIO *f)
2075 PERL_UNUSED_CONTEXT;
2081 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2084 * Save the position as current head considers it
2086 const Off_t old = PerlIO_tell(f);
2087 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2088 PerlIOSelf(f, PerlIOBuf)->posn = old;
2089 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2093 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2095 STDCHAR *buf = (STDCHAR *) vbuf;
2097 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2098 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2099 SETERRNO(EBADF, SS_IVCHAN);
2105 SSize_t avail = PerlIO_get_cnt(f);
2108 take = ((SSize_t)count < avail) ? (SSize_t)count : avail;
2110 STDCHAR *ptr = PerlIO_get_ptr(f);
2111 Copy(ptr, buf, take, STDCHAR);
2112 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2115 if (avail == 0) /* set_ptrcnt could have reset avail */
2118 if (count > 0 && avail <= 0) {
2119 if (PerlIO_fill(f) != 0)
2124 return (buf - (STDCHAR *) vbuf);
2130 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2132 PERL_UNUSED_CONTEXT;
2138 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2140 PERL_UNUSED_CONTEXT;
2146 PerlIOBase_close(pTHX_ PerlIO *f)
2149 if (PerlIOValid(f)) {
2150 PerlIO *n = PerlIONext(f);
2151 code = PerlIO_flush(f);
2152 PerlIOBase(f)->flags &=
2153 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2154 while (PerlIOValid(n)) {
2155 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2156 if (tab && tab->Close) {
2157 if ((*tab->Close)(aTHX_ n) != 0)
2162 PerlIOBase(n)->flags &=
2163 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2169 SETERRNO(EBADF, SS_IVCHAN);
2175 PerlIOBase_eof(pTHX_ PerlIO *f)
2177 PERL_UNUSED_CONTEXT;
2178 if (PerlIOValid(f)) {
2179 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2185 PerlIOBase_error(pTHX_ PerlIO *f)
2187 PERL_UNUSED_CONTEXT;
2188 if (PerlIOValid(f)) {
2189 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2195 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2197 if (PerlIOValid(f)) {
2198 PerlIO * const n = PerlIONext(f);
2199 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2206 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2208 PERL_UNUSED_CONTEXT;
2209 if (PerlIOValid(f)) {
2210 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2215 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2221 return sv_dup(arg, param);
2224 return newSVsv(arg);
2227 PERL_UNUSED_ARG(param);
2228 return newSVsv(arg);
2233 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2235 PerlIO * const nexto = PerlIONext(o);
2236 if (PerlIOValid(nexto)) {
2237 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2238 if (tab && tab->Dup)
2239 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2241 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2244 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2247 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2248 self->name, (void*)f, (void*)o, (void*)param);
2250 arg = (*self->Getarg)(aTHX_ o, param, flags);
2254 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2262 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2264 /* Must be called with PL_perlio_mutex locked. */
2266 S_more_refcounted_fds(pTHX_ const int new_fd) {
2268 const int old_max = PL_perlio_fd_refcnt_size;
2269 const int new_max = 16 + (new_fd & ~15);
2272 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2273 old_max, new_fd, new_max);
2275 if (new_fd < old_max) {
2279 assert (new_max > new_fd);
2281 /* Use plain realloc() since we need this memory to be really
2282 * global and visible to all the interpreters and/or threads. */
2283 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2287 MUTEX_UNLOCK(&PL_perlio_mutex);
2289 /* Can't use PerlIO to write as it allocates memory */
2290 PerlLIO_write(PerlIO_fileno(Perl_error_log),
2291 PL_no_mem, strlen(PL_no_mem));
2295 PL_perlio_fd_refcnt_size = new_max;
2296 PL_perlio_fd_refcnt = new_array;
2298 PerlIO_debug("Zeroing %p, %d\n",
2299 (void*)(new_array + old_max),
2302 Zero(new_array + old_max, new_max - old_max, int);
2309 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2310 PERL_UNUSED_CONTEXT;
2314 PerlIOUnix_refcnt_inc(int fd)
2321 MUTEX_LOCK(&PL_perlio_mutex);
2323 if (fd >= PL_perlio_fd_refcnt_size)
2324 S_more_refcounted_fds(aTHX_ fd);
2326 PL_perlio_fd_refcnt[fd]++;
2327 if (PL_perlio_fd_refcnt[fd] <= 0) {
2328 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2329 fd, PL_perlio_fd_refcnt[fd]);
2331 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2332 fd, PL_perlio_fd_refcnt[fd]);
2335 MUTEX_UNLOCK(&PL_perlio_mutex);
2338 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2343 PerlIOUnix_refcnt_dec(int fd)
2350 MUTEX_LOCK(&PL_perlio_mutex);
2352 if (fd >= PL_perlio_fd_refcnt_size) {
2353 Perl_croak(aTHX_ "refcnt_dec: fd %d >= refcnt_size %d\n",
2354 fd, PL_perlio_fd_refcnt_size);
2356 if (PL_perlio_fd_refcnt[fd] <= 0) {
2357 Perl_croak(aTHX_ "refcnt_dec: fd %d: %d <= 0\n",
2358 fd, PL_perlio_fd_refcnt[fd]);
2360 cnt = --PL_perlio_fd_refcnt[fd];
2361 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2363 MUTEX_UNLOCK(&PL_perlio_mutex);
2366 Perl_croak(aTHX_ "refcnt_dec: fd %d < 0\n", fd);
2372 PerlIO_cleanup(pTHX)
2377 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2379 PerlIO_debug("Cleanup layers\n");
2382 /* Raise STDIN..STDERR refcount so we don't close them */
2383 for (i=0; i < 3; i++)
2384 PerlIOUnix_refcnt_inc(i);
2385 PerlIO_cleantable(aTHX_ &PL_perlio);
2386 /* Restore STDIN..STDERR refcount */
2387 for (i=0; i < 3; i++)
2388 PerlIOUnix_refcnt_dec(i);
2390 if (PL_known_layers) {
2391 PerlIO_list_free(aTHX_ PL_known_layers);
2392 PL_known_layers = NULL;
2394 if (PL_def_layerlist) {
2395 PerlIO_list_free(aTHX_ PL_def_layerlist);
2396 PL_def_layerlist = NULL;
2400 void PerlIO_teardown(pTHX) /* Call only from PERL_SYS_TERM(). */
2405 /* By now all filehandles should have been closed, so any
2406 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2409 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2410 if (PL_perlio_fd_refcnt[i])
2411 PerlIO_debug("PerlIO_cleanup: fd %d refcnt=%d\n",
2412 i, PL_perlio_fd_refcnt[i]);
2416 /* Not bothering with PL_perlio_mutex since by now
2417 * all the interpreters are gone. */
2418 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2419 && PL_perlio_fd_refcnt) {
2420 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2421 PL_perlio_fd_refcnt = NULL;
2422 PL_perlio_fd_refcnt_size = 0;
2426 /*--------------------------------------------------------------------------------------*/
2428 * Bottom-most level for UNIX-like case
2432 struct _PerlIO base; /* The generic part */
2433 int fd; /* UNIX like file descriptor */
2434 int oflags; /* open/fcntl flags */
2438 PerlIOUnix_oflags(const char *mode)
2441 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2446 if (*++mode == '+') {
2453 oflags = O_CREAT | O_TRUNC;
2454 if (*++mode == '+') {
2463 oflags = O_CREAT | O_APPEND;
2464 if (*++mode == '+') {
2477 else if (*mode == 't') {
2479 oflags &= ~O_BINARY;
2483 * Always open in binary mode
2486 if (*mode || oflags == -1) {
2487 SETERRNO(EINVAL, LIB_INVARG);
2494 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2496 PERL_UNUSED_CONTEXT;
2497 return PerlIOSelf(f, PerlIOUnix)->fd;
2501 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2503 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2506 if (PerlLIO_fstat(fd, &st) == 0) {
2507 if (!S_ISREG(st.st_mode)) {
2508 PerlIO_debug("%d is not regular file\n",fd);
2509 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2512 PerlIO_debug("%d _is_ a regular file\n",fd);
2518 PerlIOUnix_refcnt_inc(fd);
2519 PERL_UNUSED_CONTEXT;
2523 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2525 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2526 if (*PerlIONext(f)) {
2527 /* We never call down so do any pending stuff now */
2528 PerlIO_flush(PerlIONext(f));
2530 * XXX could (or should) we retrieve the oflags from the open file
2531 * handle rather than believing the "mode" we are passed in? XXX
2532 * Should the value on NULL mode be 0 or -1?
2534 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2535 mode ? PerlIOUnix_oflags(mode) : -1);
2537 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2543 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2545 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2547 PERL_UNUSED_CONTEXT;
2548 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2550 SETERRNO(ESPIPE, LIB_INVARG);
2552 SETERRNO(EINVAL, LIB_INVARG);
2556 new_loc = PerlLIO_lseek(fd, offset, whence);
2557 if (new_loc == (Off_t) - 1)
2559 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2564 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2565 IV n, const char *mode, int fd, int imode,
2566 int perm, PerlIO *f, int narg, SV **args)
2568 if (PerlIOValid(f)) {
2569 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2570 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2573 if (*mode == IoTYPE_NUMERIC)
2576 imode = PerlIOUnix_oflags(mode);
2580 const char *path = SvPV_nolen_const(*args);
2581 fd = PerlLIO_open3(path, imode, perm);
2585 if (*mode == IoTYPE_IMPLICIT)
2588 f = PerlIO_allocate(aTHX);
2590 if (!PerlIOValid(f)) {
2591 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2595 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2596 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2597 if (*mode == IoTYPE_APPEND)
2598 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2605 * FIXME: pop layers ???
2613 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2615 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2617 if (flags & PERLIO_DUP_FD) {
2618 fd = PerlLIO_dup(fd);
2621 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2623 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2624 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2633 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2636 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2637 #ifdef PERLIO_STD_SPECIAL
2639 return PERLIO_STD_IN(fd, vbuf, count);
2641 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2642 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2646 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2647 if (len >= 0 || errno != EINTR) {
2649 if (errno != EAGAIN) {
2650 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2653 else if (len == 0 && count != 0) {
2654 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2665 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2668 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2669 #ifdef PERLIO_STD_SPECIAL
2670 if (fd == 1 || fd == 2)
2671 return PERLIO_STD_OUT(fd, vbuf, count);
2674 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2675 if (len >= 0 || errno != EINTR) {
2677 if (errno != EAGAIN) {
2678 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2689 PerlIOUnix_tell(pTHX_ PerlIO *f)
2691 PERL_UNUSED_CONTEXT;
2693 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2698 PerlIOUnix_close(pTHX_ PerlIO *f)
2701 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2703 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2704 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2705 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2710 SETERRNO(EBADF,SS_IVCHAN);
2713 while (PerlLIO_close(fd) != 0) {
2714 if (errno != EINTR) {
2721 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2726 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2727 sizeof(PerlIO_funcs),
2734 PerlIOBase_binmode, /* binmode */
2744 PerlIOBase_noop_ok, /* flush */
2745 PerlIOBase_noop_fail, /* fill */
2748 PerlIOBase_clearerr,
2749 PerlIOBase_setlinebuf,
2750 NULL, /* get_base */
2751 NULL, /* get_bufsiz */
2754 NULL, /* set_ptrcnt */
2757 /*--------------------------------------------------------------------------------------*/
2762 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2763 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2764 broken by the last second glibc 2.3 fix
2766 #define STDIO_BUFFER_WRITABLE
2771 struct _PerlIO base;
2772 FILE *stdio; /* The stream */
2776 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2778 PERL_UNUSED_CONTEXT;
2780 if (PerlIOValid(f)) {
2781 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2783 return PerlSIO_fileno(s);
2790 PerlIOStdio_mode(const char *mode, char *tmode)
2792 char * const ret = tmode;
2798 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2806 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2809 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2810 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2811 if (toptab == tab) {
2812 /* Top is already stdio - pop self (duplicate) and use original */
2813 PerlIO_pop(aTHX_ f);
2816 const int fd = PerlIO_fileno(n);
2819 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2820 mode = PerlIOStdio_mode(mode, tmode)))) {
2821 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2822 /* We never call down so do any pending stuff now */
2823 PerlIO_flush(PerlIONext(f));
2830 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2835 PerlIO_importFILE(FILE *stdio, const char *mode)
2841 if (!mode || !*mode) {
2842 /* We need to probe to see how we can open the stream
2843 so start with read/write and then try write and read
2844 we dup() so that we can fclose without loosing the fd.
2846 Note that the errno value set by a failing fdopen
2847 varies between stdio implementations.
2849 const int fd = PerlLIO_dup(fileno(stdio));
2850 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2852 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2855 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2858 /* Don't seem to be able to open */
2864 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2865 s = PerlIOSelf(f, PerlIOStdio);
2873 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2874 IV n, const char *mode, int fd, int imode,
2875 int perm, PerlIO *f, int narg, SV **args)
2878 if (PerlIOValid(f)) {
2879 const char * const path = SvPV_nolen_const(*args);
2880 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2882 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2883 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2888 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2893 const char * const path = SvPV_nolen_const(*args);
2894 if (*mode == IoTYPE_NUMERIC) {
2896 fd = PerlLIO_open3(path, imode, perm);
2900 bool appended = FALSE;
2902 /* Cygwin wants its 'b' early. */
2904 mode = PerlIOStdio_mode(mode, tmode);
2906 stdio = PerlSIO_fopen(path, mode);
2909 f = PerlIO_allocate(aTHX);
2912 mode = PerlIOStdio_mode(mode, tmode);
2913 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
2915 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2916 PerlIOUnix_refcnt_inc(fileno(stdio));
2918 PerlSIO_fclose(stdio);
2930 if (*mode == IoTYPE_IMPLICIT) {
2937 stdio = PerlSIO_stdin;
2940 stdio = PerlSIO_stdout;
2943 stdio = PerlSIO_stderr;
2948 stdio = PerlSIO_fdopen(fd, mode =
2949 PerlIOStdio_mode(mode, tmode));
2953 f = PerlIO_allocate(aTHX);
2955 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2956 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2957 PerlIOUnix_refcnt_inc(fileno(stdio));
2967 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2969 /* This assumes no layers underneath - which is what
2970 happens, but is not how I remember it. NI-S 2001/10/16
2972 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2973 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2974 const int fd = fileno(stdio);
2976 if (flags & PERLIO_DUP_FD) {
2977 const int dfd = PerlLIO_dup(fileno(stdio));
2979 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2984 /* FIXME: To avoid messy error recovery if dup fails
2985 re-use the existing stdio as though flag was not set
2989 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2991 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2992 PerlIOUnix_refcnt_inc(fileno(stdio));
2998 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3000 PERL_UNUSED_CONTEXT;
3002 /* XXX this could use PerlIO_canset_fileno() and
3003 * PerlIO_set_fileno() support from Configure
3005 # if defined(__UCLIBC__)
3006 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3009 # elif defined(__GLIBC__)
3010 /* There may be a better way for GLIBC:
3011 - libio.h defines a flag to not close() on cleanup
3015 # elif defined(__sun__)
3018 # elif defined(__hpux)
3022 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3023 your platform does not have special entry try this one.
3024 [For OSF only have confirmation for Tru64 (alpha)
3025 but assume other OSFs will be similar.]
3027 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3030 # elif defined(__FreeBSD__)
3031 /* There may be a better way on FreeBSD:
3032 - we could insert a dummy func in the _close function entry
3033 f->_close = (int (*)(void *)) dummy_close;
3037 # elif defined(__OpenBSD__)
3038 /* There may be a better way on OpenBSD:
3039 - we could insert a dummy func in the _close function entry
3040 f->_close = (int (*)(void *)) dummy_close;
3044 # elif defined(__EMX__)
3045 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3048 # elif defined(__CYGWIN__)
3049 /* There may be a better way on CYGWIN:
3050 - we could insert a dummy func in the _close function entry
3051 f->_close = (int (*)(void *)) dummy_close;
3055 # elif defined(WIN32)
3056 # if defined(__BORLANDC__)
3057 f->fd = PerlLIO_dup(fileno(f));
3058 # elif defined(UNDER_CE)
3059 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3068 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3069 (which isn't thread safe) instead
3071 # error "Don't know how to set FILE.fileno on your platform"
3079 PerlIOStdio_close(pTHX_ PerlIO *f)
3081 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3087 const int fd = fileno(stdio);
3092 #ifdef SOCKS5_VERSION_NAME
3093 /* Socks lib overrides close() but stdio isn't linked to
3094 that library (though we are) - so we must call close()
3095 on sockets on stdio's behalf.
3098 Sock_size_t optlen = sizeof(int);
3099 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3102 if (PerlIOUnix_refcnt_dec(fd) > 0) /* File descriptor still in use */
3105 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3106 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3108 if (stdio == stdout || stdio == stderr)
3109 return PerlIO_flush(f);
3110 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3111 Use Sarathy's trick from maint-5.6 to invalidate the
3112 fileno slot of the FILE *
3114 result = PerlIO_flush(f);
3116 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3118 dupfd = PerlLIO_dup(fd);
3120 result = PerlSIO_fclose(stdio);
3121 /* We treat error from stdio as success if we invalidated
3122 errno may NOT be expected EBADF
3124 if (invalidate && result != 0) {
3128 #ifdef SOCKS5_VERSION_NAME
3129 /* in SOCKS' case, let close() determine return value */
3133 PerlLIO_dup2(dupfd,fd);
3134 PerlLIO_close(dupfd);
3141 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3144 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3148 STDCHAR *buf = (STDCHAR *) vbuf;
3150 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3151 * stdio does not do that for fread()
3153 const int ch = PerlSIO_fgetc(s);
3160 got = PerlSIO_fread(vbuf, 1, count, s);
3161 if (got == 0 && PerlSIO_ferror(s))
3163 if (got >= 0 || errno != EINTR)
3166 SETERRNO(0,0); /* just in case */
3172 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3175 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3177 #ifdef STDIO_BUFFER_WRITABLE
3178 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3179 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3180 STDCHAR *base = PerlIO_get_base(f);
3181 SSize_t cnt = PerlIO_get_cnt(f);
3182 STDCHAR *ptr = PerlIO_get_ptr(f);
3183 SSize_t avail = ptr - base;
3185 if (avail > count) {
3189 Move(buf-avail,ptr,avail,STDCHAR);
3192 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3193 if (PerlSIO_feof(s) && unread >= 0)
3194 PerlSIO_clearerr(s);
3199 if (PerlIO_has_cntptr(f)) {
3200 /* We can get pointer to buffer but not its base
3201 Do ungetc() but check chars are ending up in the
3204 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3205 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3207 const int ch = *--buf & 0xFF;
3208 if (ungetc(ch,s) != ch) {
3209 /* ungetc did not work */
3212 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3213 /* Did not change pointer as expected */
3214 fgetc(s); /* get char back again */
3224 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3230 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3235 got = PerlSIO_fwrite(vbuf, 1, count,
3236 PerlIOSelf(f, PerlIOStdio)->stdio);
3237 if (got >= 0 || errno != EINTR)
3240 SETERRNO(0,0); /* just in case */
3246 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3248 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3249 PERL_UNUSED_CONTEXT;
3251 return PerlSIO_fseek(stdio, offset, whence);
3255 PerlIOStdio_tell(pTHX_ PerlIO *f)
3257 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3258 PERL_UNUSED_CONTEXT;
3260 return PerlSIO_ftell(stdio);
3264 PerlIOStdio_flush(pTHX_ PerlIO *f)
3266 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3267 PERL_UNUSED_CONTEXT;
3269 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3270 return PerlSIO_fflush(stdio);
3276 * FIXME: This discards ungetc() and pre-read stuff which is not
3277 * right if this is just a "sync" from a layer above Suspect right
3278 * design is to do _this_ but not have layer above flush this
3279 * layer read-to-read
3282 * Not writeable - sync by attempting a seek
3284 const int err = errno;
3285 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3293 PerlIOStdio_eof(pTHX_ PerlIO *f)
3295 PERL_UNUSED_CONTEXT;
3297 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3301 PerlIOStdio_error(pTHX_ PerlIO *f)
3303 PERL_UNUSED_CONTEXT;
3305 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3309 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3311 PERL_UNUSED_CONTEXT;
3313 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3317 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3319 PERL_UNUSED_CONTEXT;
3321 #ifdef HAS_SETLINEBUF
3322 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3324 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3330 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3332 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3333 return (STDCHAR*)PerlSIO_get_base(stdio);
3337 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3339 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3340 return PerlSIO_get_bufsiz(stdio);
3344 #ifdef USE_STDIO_PTR
3346 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3348 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3349 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3353 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3355 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3356 return PerlSIO_get_cnt(stdio);
3360 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3362 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3364 #ifdef STDIO_PTR_LVALUE
3365 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3366 #ifdef STDIO_PTR_LVAL_SETS_CNT
3367 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3368 assert(PerlSIO_get_cnt(stdio) == (cnt));
3371 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3373 * Setting ptr _does_ change cnt - we are done
3377 #else /* STDIO_PTR_LVALUE */
3379 #endif /* STDIO_PTR_LVALUE */
3382 * Now (or only) set cnt
3384 #ifdef STDIO_CNT_LVALUE
3385 PerlSIO_set_cnt(stdio, cnt);
3386 #else /* STDIO_CNT_LVALUE */
3387 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3388 PerlSIO_set_ptr(stdio,
3389 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3391 #else /* STDIO_PTR_LVAL_SETS_CNT */
3393 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3394 #endif /* STDIO_CNT_LVALUE */
3401 PerlIOStdio_fill(pTHX_ PerlIO *f)
3403 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3405 PERL_UNUSED_CONTEXT;
3408 * fflush()ing read-only streams can cause trouble on some stdio-s
3410 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3411 if (PerlSIO_fflush(stdio) != 0)
3414 c = PerlSIO_fgetc(stdio);
3418 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3420 #ifdef STDIO_BUFFER_WRITABLE
3421 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3422 /* Fake ungetc() to the real buffer in case system's ungetc
3425 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3426 SSize_t cnt = PerlSIO_get_cnt(stdio);
3427 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3428 if (ptr == base+1) {
3429 *--ptr = (STDCHAR) c;
3430 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3431 if (PerlSIO_feof(stdio))
3432 PerlSIO_clearerr(stdio);
3438 if (PerlIO_has_cntptr(f)) {
3440 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3447 /* An ungetc()d char is handled separately from the regular
3448 * buffer, so we stuff it in the buffer ourselves.
3449 * Should never get called as should hit code above
3451 *(--((*stdio)->_ptr)) = (unsigned char) c;
3454 /* If buffer snoop scheme above fails fall back to
3457 if (PerlSIO_ungetc(c, stdio) != c)
3465 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3466 sizeof(PerlIO_funcs),
3468 sizeof(PerlIOStdio),
3469 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3473 PerlIOBase_binmode, /* binmode */
3487 PerlIOStdio_clearerr,
3488 PerlIOStdio_setlinebuf,
3490 PerlIOStdio_get_base,
3491 PerlIOStdio_get_bufsiz,
3496 #ifdef USE_STDIO_PTR
3497 PerlIOStdio_get_ptr,
3498 PerlIOStdio_get_cnt,
3499 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3500 PerlIOStdio_set_ptrcnt,
3503 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3508 #endif /* USE_STDIO_PTR */
3511 /* Note that calls to PerlIO_exportFILE() are reversed using
3512 * PerlIO_releaseFILE(), not importFILE. */
3514 PerlIO_exportFILE(PerlIO * f, const char *mode)
3518 if (PerlIOValid(f)) {
3521 if (!mode || !*mode) {
3522 mode = PerlIO_modestr(f, buf);
3524 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3528 /* De-link any lower layers so new :stdio sticks */
3530 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3531 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3533 /* Link previous lower layers under new one */
3537 /* restore layers list */
3547 PerlIO_findFILE(PerlIO *f)
3551 if (l->tab == &PerlIO_stdio) {
3552 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3555 l = *PerlIONext(&l);
3557 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3558 return PerlIO_exportFILE(f, NULL);
3561 /* Use this to reverse PerlIO_exportFILE calls. */
3563 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3568 if (l->tab == &PerlIO_stdio) {
3569 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3570 if (s->stdio == f) {
3572 PerlIO_pop(aTHX_ p);
3581 /*--------------------------------------------------------------------------------------*/
3583 * perlio buffer layer
3587 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3589 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3590 const int fd = PerlIO_fileno(f);
3591 if (fd >= 0 && PerlLIO_isatty(fd)) {
3592 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3594 if (*PerlIONext(f)) {
3595 const Off_t posn = PerlIO_tell(PerlIONext(f));
3596 if (posn != (Off_t) - 1) {
3600 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3604 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3605 IV n, const char *mode, int fd, int imode, int perm,
3606 PerlIO *f, int narg, SV **args)
3608 if (PerlIOValid(f)) {
3609 PerlIO *next = PerlIONext(f);
3611 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3612 if (tab && tab->Open)
3614 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3616 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3621 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3623 if (*mode == IoTYPE_IMPLICIT) {
3629 if (tab && tab->Open)
3630 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3633 SETERRNO(EINVAL, LIB_INVARG);
3635 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3637 * if push fails during open, open fails. close will pop us.
3642 fd = PerlIO_fileno(f);
3643 if (init && fd == 2) {
3645 * Initial stderr is unbuffered
3647 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3649 #ifdef PERLIO_USING_CRLF
3650 # ifdef PERLIO_IS_BINMODE_FD
3651 if (PERLIO_IS_BINMODE_FD(fd))
3652 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3656 * do something about failing setmode()? --jhi
3658 PerlLIO_setmode(fd, O_BINARY);
3667 * This "flush" is akin to sfio's sync in that it handles files in either
3668 * read or write state. For write state, we put the postponed data through
3669 * the next layers. For read state, we seek() the next layers to the
3670 * offset given by current position in the buffer, and discard the buffer
3671 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3672 * in any case?). Then the pass the stick further in chain.
3675 PerlIOBuf_flush(pTHX_ PerlIO *f)
3677 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3679 PerlIO *n = PerlIONext(f);
3680 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3682 * write() the buffer
3684 const STDCHAR *buf = b->buf;
3685 const STDCHAR *p = buf;
3686 while (p < b->ptr) {
3687 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3691 else if (count < 0 || PerlIO_error(n)) {
3692 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3697 b->posn += (p - buf);
3699 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3700 STDCHAR *buf = PerlIO_get_base(f);
3702 * Note position change
3704 b->posn += (b->ptr - buf);
3705 if (b->ptr < b->end) {
3706 /* We did not consume all of it - try and seek downstream to
3707 our logical position
3709 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3710 /* Reload n as some layers may pop themselves on seek */
3711 b->posn = PerlIO_tell(n = PerlIONext(f));
3714 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3715 data is lost for good - so return saying "ok" having undone
3718 b->posn -= (b->ptr - buf);
3723 b->ptr = b->end = b->buf;
3724 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3725 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3726 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3731 /* This discards the content of the buffer after b->ptr, and rereads
3732 * the buffer from the position off in the layer downstream; here off
3733 * is at offset corresponding to b->ptr - b->buf.
3736 PerlIOBuf_fill(pTHX_ PerlIO *f)
3738 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3739 PerlIO *n = PerlIONext(f);
3742 * Down-stream flush is defined not to loose read data so is harmless.
3743 * we would not normally be fill'ing if there was data left in anycase.
3745 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3747 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3748 PerlIOBase_flush_linebuf(aTHX);
3751 PerlIO_get_base(f); /* allocate via vtable */
3753 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3755 b->ptr = b->end = b->buf;
3757 if (!PerlIOValid(n)) {
3758 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3762 if (PerlIO_fast_gets(n)) {
3764 * Layer below is also buffered. We do _NOT_ want to call its
3765 * ->Read() because that will loop till it gets what we asked for
3766 * which may hang on a pipe etc. Instead take anything it has to
3767 * hand, or ask it to fill _once_.
3769 avail = PerlIO_get_cnt(n);
3771 avail = PerlIO_fill(n);
3773 avail = PerlIO_get_cnt(n);
3775 if (!PerlIO_error(n) && PerlIO_eof(n))
3780 STDCHAR *ptr = PerlIO_get_ptr(n);
3781 const SSize_t cnt = avail;
3782 if (avail > (SSize_t)b->bufsiz)
3784 Copy(ptr, b->buf, avail, STDCHAR);
3785 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3789 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3793 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3795 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3798 b->end = b->buf + avail;
3799 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3804 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3806 if (PerlIOValid(f)) {
3807 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3810 return PerlIOBase_read(aTHX_ f, vbuf, count);
3816 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3818 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3819 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3822 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3827 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3829 * Buffer is already a read buffer, we can overwrite any chars
3830 * which have been read back to buffer start
3832 avail = (b->ptr - b->buf);
3836 * Buffer is idle, set it up so whole buffer is available for
3840 b->end = b->buf + avail;
3842 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3844 * Buffer extends _back_ from where we are now
3846 b->posn -= b->bufsiz;
3848 if (avail > (SSize_t) count) {
3850 * If we have space for more than count, just move count
3858 * In simple stdio-like ungetc() case chars will be already
3861 if (buf != b->ptr) {
3862 Copy(buf, b->ptr, avail, STDCHAR);
3866 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3870 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3876 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3878 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3879 const STDCHAR *buf = (const STDCHAR *) vbuf;
3880 const STDCHAR *flushptr = buf;
3884 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3886 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3887 if (PerlIO_flush(f) != 0) {
3891 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3892 flushptr = buf + count;
3893 while (flushptr > buf && *(flushptr - 1) != '\n')
3897 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3898 if ((SSize_t) count < avail)
3900 if (flushptr > buf && flushptr <= buf + avail)
3901 avail = flushptr - buf;
3902 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3904 Copy(buf, b->ptr, avail, STDCHAR);
3909 if (buf == flushptr)
3912 if (b->ptr >= (b->buf + b->bufsiz))
3915 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3921 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3924 if ((code = PerlIO_flush(f)) == 0) {
3925 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3926 code = PerlIO_seek(PerlIONext(f), offset, whence);
3928 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3929 b->posn = PerlIO_tell(PerlIONext(f));
3936 PerlIOBuf_tell(pTHX_ PerlIO *f)
3938 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3940 * b->posn is file position where b->buf was read, or will be written
3942 Off_t posn = b->posn;
3943 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3944 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3946 /* As O_APPEND files are normally shared in some sense it is better
3951 /* when file is NOT shared then this is sufficient */
3952 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3954 posn = b->posn = PerlIO_tell(PerlIONext(f));
3958 * If buffer is valid adjust position by amount in buffer
3960 posn += (b->ptr - b->buf);
3966 PerlIOBuf_popped(pTHX_ PerlIO *f)
3968 const IV code = PerlIOBase_popped(aTHX_ f);
3969 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3970 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3973 b->ptr = b->end = b->buf = NULL;
3974 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3979 PerlIOBuf_close(pTHX_ PerlIO *f)
3981 const IV code = PerlIOBase_close(aTHX_ f);
3982 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3983 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3986 b->ptr = b->end = b->buf = NULL;
3987 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3992 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3994 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4001 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4003 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4006 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4007 return (b->end - b->ptr);
4012 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4014 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4015 PERL_UNUSED_CONTEXT;
4020 b->buf = Newxz(b->buf,b->bufsiz, STDCHAR);
4022 b->buf = (STDCHAR *) & b->oneword;
4023 b->bufsiz = sizeof(b->oneword);
4025 b->end = b->ptr = b->buf;
4031 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4033 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4036 return (b->end - b->buf);
4040 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4042 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4046 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
4047 assert(PerlIO_get_cnt(f) == cnt);
4048 assert(b->ptr >= b->buf);
4050 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4054 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4056 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4061 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4062 sizeof(PerlIO_funcs),
4065 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4069 PerlIOBase_binmode, /* binmode */
4083 PerlIOBase_clearerr,
4084 PerlIOBase_setlinebuf,
4089 PerlIOBuf_set_ptrcnt,
4092 /*--------------------------------------------------------------------------------------*/
4094 * Temp layer to hold unread chars when cannot do it any other way
4098 PerlIOPending_fill(pTHX_ PerlIO *f)
4101 * Should never happen
4108 PerlIOPending_close(pTHX_ PerlIO *f)
4111 * A tad tricky - flush pops us, then we close new top
4114 return PerlIO_close(f);
4118 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4121 * A tad tricky - flush pops us, then we seek new top
4124 return PerlIO_seek(f, offset, whence);
4129 PerlIOPending_flush(pTHX_ PerlIO *f)
4131 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4132 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4136 PerlIO_pop(aTHX_ f);
4141 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4147 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4152 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4154 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4155 PerlIOl * const l = PerlIOBase(f);
4157 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4158 * etc. get muddled when it changes mid-string when we auto-pop.
4160 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4161 (PerlIOBase(PerlIONext(f))->
4162 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4167 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4169 SSize_t avail = PerlIO_get_cnt(f);
4171 if ((SSize_t)count < avail)
4174 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4175 if (got >= 0 && got < (SSize_t)count) {
4176 const SSize_t more =
4177 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4178 if (more >= 0 || got == 0)
4184 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4185 sizeof(PerlIO_funcs),
4188 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4189 PerlIOPending_pushed,
4192 PerlIOBase_binmode, /* binmode */
4201 PerlIOPending_close,
4202 PerlIOPending_flush,
4206 PerlIOBase_clearerr,
4207 PerlIOBase_setlinebuf,
4212 PerlIOPending_set_ptrcnt,
4217 /*--------------------------------------------------------------------------------------*/
4219 * crlf - translation On read translate CR,LF to "\n" we do this by
4220 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4221 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4223 * c->nl points on the first byte of CR LF pair when it is temporarily
4224 * replaced by LF, or to the last CR of the buffer. In the former case
4225 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4226 * that it ends at c->nl; these two cases can be distinguished by
4227 * *c->nl. c->nl is set during _getcnt() call, and unset during
4228 * _unread() and _flush() calls.
4229 * It only matters for read operations.
4233 PerlIOBuf base; /* PerlIOBuf stuff */
4234 STDCHAR *nl; /* Position of crlf we "lied" about in the
4238 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4239 * Otherwise the :crlf layer would always revert back to
4243 S_inherit_utf8_flag(PerlIO *f)
4245 PerlIO *g = PerlIONext(f);
4246 if (PerlIOValid(g)) {
4247 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4248 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4254 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4257 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4258 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4260 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4261 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4262 PerlIOBase(f)->flags);
4265 /* Enable the first CRLF capable layer you can find, but if none
4266 * found, the one we just pushed is fine. This results in at
4267 * any given moment at most one CRLF-capable layer being enabled
4268 * in the whole layer stack. */
4269 PerlIO *g = PerlIONext(f);
4270 while (PerlIOValid(g)) {
4271 PerlIOl *b = PerlIOBase(g);
4272 if (b && b->tab == &PerlIO_crlf) {
4273 if (!(b->flags & PERLIO_F_CRLF))
4274 b->flags |= PERLIO_F_CRLF;
4275 S_inherit_utf8_flag(g);
4276 PerlIO_pop(aTHX_ f);
4282 S_inherit_utf8_flag(f);
4288 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4290 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4291 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4295 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4296 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4298 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4299 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4301 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4306 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4307 b->end = b->ptr = b->buf + b->bufsiz;
4308 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4309 b->posn -= b->bufsiz;
4311 while (count > 0 && b->ptr > b->buf) {
4312 const int ch = *--buf;
4314 if (b->ptr - 2 >= b->buf) {
4321 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4322 *--(b->ptr) = 0xa; /* Works even if 0xa == '\r' */
4338 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4340 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4342 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4345 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4346 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4347 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4348 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4350 while (nl < b->end && *nl != 0xd)
4352 if (nl < b->end && *nl == 0xd) {
4354 if (nl + 1 < b->end) {
4361 * Not CR,LF but just CR
4369 * Blast - found CR as last char in buffer
4374 * They may not care, defer work as long as
4378 return (nl - b->ptr);
4382 b->ptr++; /* say we have read it as far as
4383 * flush() is concerned */
4384 b->buf++; /* Leave space in front of buffer */
4385 /* Note as we have moved buf up flush's
4387 will naturally make posn point at CR
4389 b->bufsiz--; /* Buffer is thus smaller */
4390 code = PerlIO_fill(f); /* Fetch some more */
4391 b->bufsiz++; /* Restore size for next time */
4392 b->buf--; /* Point at space */
4393 b->ptr = nl = b->buf; /* Which is what we hand
4395 *nl = 0xd; /* Fill in the CR */
4397 goto test; /* fill() call worked */
4399 * CR at EOF - just fall through
4401 /* Should we clear EOF though ??? */
4406 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4412 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4414 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4415 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4421 if (ptr == b->end && *c->nl == 0xd) {
4422 /* Defered CR at end of buffer case - we lied about count */
4435 * Test code - delete when it works ...
4437 IV flags = PerlIOBase(f)->flags;
4438 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4439 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4440 /* Defered CR at end of buffer case - we lied about count */
4446 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4447 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4455 * They have taken what we lied about
4463 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4467 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4469 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4470 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4472 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4473 const STDCHAR *buf = (const STDCHAR *) vbuf;
4474 const STDCHAR * const ebuf = buf + count;
4477 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4479 while (buf < ebuf) {
4480 const STDCHAR * const eptr = b->buf + b->bufsiz;
4481 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4482 while (buf < ebuf && b->ptr < eptr) {
4484 if ((b->ptr + 2) > eptr) {
4492 *(b->ptr)++ = 0xd; /* CR */
4493 *(b->ptr)++ = 0xa; /* LF */
4495 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4502 *(b->ptr)++ = *buf++;
4504 if (b->ptr >= eptr) {
4510 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4512 return (buf - (STDCHAR *) vbuf);
4517 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4519 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4524 return PerlIOBuf_flush(aTHX_ f);
4528 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4530 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4531 /* In text mode - flush any pending stuff and flip it */
4532 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4533 #ifndef PERLIO_USING_CRLF
4534 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4535 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4536 PerlIO_pop(aTHX_ f);
4543 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4544 sizeof(PerlIO_funcs),
4547 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4549 PerlIOBuf_popped, /* popped */
4551 PerlIOCrlf_binmode, /* binmode */
4555 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4556 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4557 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4565 PerlIOBase_clearerr,
4566 PerlIOBase_setlinebuf,
4571 PerlIOCrlf_set_ptrcnt,
4575 /*--------------------------------------------------------------------------------------*/
4577 * mmap as "buffer" layer
4581 PerlIOBuf base; /* PerlIOBuf stuff */
4582 Mmap_t mptr; /* Mapped address */
4583 Size_t len; /* mapped length */
4584 STDCHAR *bbuf; /* malloced buffer if map fails */
4588 PerlIOMmap_map(pTHX_ PerlIO *f)
4591 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4592 const IV flags = PerlIOBase(f)->flags;
4596 if (flags & PERLIO_F_CANREAD) {
4597 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4598 const int fd = PerlIO_fileno(f);
4600 code = Fstat(fd, &st);
4601 if (code == 0 && S_ISREG(st.st_mode)) {
4602 SSize_t len = st.st_size - b->posn;
4605 if (PL_mmap_page_size <= 0)
4606 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4610 * This is a hack - should never happen - open should
4613 b->posn = PerlIO_tell(PerlIONext(f));
4615 posn = (b->posn / PL_mmap_page_size) * PL_mmap_page_size;
4616 len = st.st_size - posn;
4617 m->mptr = (Mmap_t)mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4618 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4619 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4620 madvise(m->mptr, len, MADV_SEQUENTIAL);
4622 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4623 madvise(m->mptr, len, MADV_WILLNEED);
4625 PerlIOBase(f)->flags =
4626 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4627 b->end = ((STDCHAR *) m->mptr) + len;
4628 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4637 PerlIOBase(f)->flags =
4638 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4640 b->ptr = b->end = b->ptr;
4649 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4651 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4654 PerlIOBuf * const b = &m->base;
4656 /* The munmap address argument is tricky: depending on the
4657 * standard it is either "void *" or "caddr_t" (which is
4658 * usually "char *" (signed or unsigned). If we cast it
4659 * to "void *", those that have it caddr_t and an uptight
4660 * C++ compiler, will freak out. But casting it as char*
4661 * should work. Maybe. (Using Mmap_t figured out by
4662 * Configure doesn't always work, apparently.) */
4663 code = munmap((char*)m->mptr, m->len);
4667 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4670 b->ptr = b->end = b->buf;
4671 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4677 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4679 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4680 PerlIOBuf * const b = &m->base;
4681 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4683 * Already have a readbuffer in progress
4689 * We have a write buffer or flushed PerlIOBuf read buffer
4691 m->bbuf = b->buf; /* save it in case we need it again */
4692 b->buf = NULL; /* Clear to trigger below */
4695 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4698 * Map did not work - recover PerlIOBuf buffer if we have one
4703 b->ptr = b->end = b->buf;
4706 return PerlIOBuf_get_base(aTHX_ f);
4710 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4712 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4713 PerlIOBuf * const b = &m->base;
4714 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4716 if (b->ptr && (b->ptr - count) >= b->buf
4717 && memEQ(b->ptr - count, vbuf, count)) {
4719 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4724 * Loose the unwritable mapped buffer
4728 * If flush took the "buffer" see if we have one from before
4730 if (!b->buf && m->bbuf)
4733 PerlIOBuf_get_base(aTHX_ f);
4737 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4741 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4743 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4744 PerlIOBuf * const b = &m->base;
4746 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4748 * No, or wrong sort of, buffer
4751 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4755 * If unmap took the "buffer" see if we have one from before
4757 if (!b->buf && m->bbuf)
4760 PerlIOBuf_get_base(aTHX_ f);
4764 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4768 PerlIOMmap_flush(pTHX_ PerlIO *f)
4770 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4771 PerlIOBuf * const b = &m->base;
4772 IV code = PerlIOBuf_flush(aTHX_ f);
4774 * Now we are "synced" at PerlIOBuf level
4781 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4786 * We seem to have a PerlIOBuf buffer which was not mapped
4787 * remember it in case we need one later
4796 PerlIOMmap_fill(pTHX_ PerlIO *f)
4798 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4799 IV code = PerlIO_flush(f);
4800 if (code == 0 && !b->buf) {
4801 code = PerlIOMmap_map(aTHX_ f);
4803 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4804 code = PerlIOBuf_fill(aTHX_ f);
4810 PerlIOMmap_close(pTHX_ PerlIO *f)
4812 PerlIOMmap * const m = PerlIOSelf(f, PerlIOMmap);
4813 PerlIOBuf * const b = &m->base;
4814 IV code = PerlIO_flush(f);
4818 b->ptr = b->end = b->buf;
4820 if (PerlIOBuf_close(aTHX_ f) != 0)
4826 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4828 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4832 PERLIO_FUNCS_DECL(PerlIO_mmap) = {
4833 sizeof(PerlIO_funcs),
4836 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4840 PerlIOBase_binmode, /* binmode */
4854 PerlIOBase_clearerr,
4855 PerlIOBase_setlinebuf,
4856 PerlIOMmap_get_base,
4860 PerlIOBuf_set_ptrcnt,
4863 #endif /* HAS_MMAP */
4866 Perl_PerlIO_stdin(pTHX)
4870 PerlIO_stdstreams(aTHX);
4872 return &PL_perlio[1];
4876 Perl_PerlIO_stdout(pTHX)
4880 PerlIO_stdstreams(aTHX);
4882 return &PL_perlio[2];
4886 Perl_PerlIO_stderr(pTHX)
4890 PerlIO_stdstreams(aTHX);
4892 return &PL_perlio[3];
4895 /*--------------------------------------------------------------------------------------*/
4898 PerlIO_getname(PerlIO *f, char *buf)
4903 bool exported = FALSE;
4904 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4906 stdio = PerlIO_exportFILE(f,0);
4910 name = fgetname(stdio, buf);
4911 if (exported) PerlIO_releaseFILE(f,stdio);
4916 PERL_UNUSED_ARG(buf);
4917 Perl_croak(aTHX_ "Don't know how to get file name");
4923 /*--------------------------------------------------------------------------------------*/
4925 * Functions which can be called on any kind of PerlIO implemented in
4929 #undef PerlIO_fdopen
4931 PerlIO_fdopen(int fd, const char *mode)
4934 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4939 PerlIO_open(const char *path, const char *mode)
4942 SV *name = sv_2mortal(newSVpv(path, 0));
4943 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4946 #undef Perlio_reopen
4948 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4951 SV *name = sv_2mortal(newSVpv(path,0));
4952 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4957 PerlIO_getc(PerlIO *f)
4961 if ( 1 == PerlIO_read(f, buf, 1) ) {
4962 return (unsigned char) buf[0];
4967 #undef PerlIO_ungetc
4969 PerlIO_ungetc(PerlIO *f, int ch)
4974 if (PerlIO_unread(f, &buf, 1) == 1)
4982 PerlIO_putc(PerlIO *f, int ch)
4986 return PerlIO_write(f, &buf, 1);
4991 PerlIO_puts(PerlIO *f, const char *s)
4994 return PerlIO_write(f, s, strlen(s));
4997 #undef PerlIO_rewind
4999 PerlIO_rewind(PerlIO *f)
5002 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
5006 #undef PerlIO_vprintf
5008 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
5011 SV * const sv = newSVpvs("");
5017 Perl_va_copy(ap, apc);
5018 sv_vcatpvf(sv, fmt, &apc);
5020 sv_vcatpvf(sv, fmt, &ap);
5022 s = SvPV_const(sv, len);
5023 wrote = PerlIO_write(f, s, len);
5028 #undef PerlIO_printf
5030 PerlIO_printf(PerlIO *f, const char *fmt, ...)
5035 result = PerlIO_vprintf(f, fmt, ap);
5040 #undef PerlIO_stdoutf
5042 PerlIO_stdoutf(const char *fmt, ...)
5048 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5053 #undef PerlIO_tmpfile
5055 PerlIO_tmpfile(void)
5060 const int fd = win32_tmpfd();
5062 f = PerlIO_fdopen(fd, "w+b");
5064 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5065 SV * const sv = newSVpvs("/tmp/PerlIO_XXXXXX");
5067 * I have no idea how portable mkstemp() is ... NI-S
5069 const int fd = mkstemp(SvPVX(sv));
5071 f = PerlIO_fdopen(fd, "w+");
5073 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5074 PerlLIO_unlink(SvPVX_const(sv));
5077 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5078 FILE * const stdio = PerlSIO_tmpfile();
5081 f = PerlIO_fdopen(fileno(stdio), "w+");
5083 # endif /* else HAS_MKSTEMP */
5084 #endif /* else WIN32 */
5091 #endif /* USE_SFIO */
5092 #endif /* PERLIO_IS_STDIO */
5094 /*======================================================================================*/
5096 * Now some functions in terms of above which may be needed even if we are
5097 * not in true PerlIO mode
5100 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5103 const char *type = NULL;
5105 * Need to supply default layer info from open.pm
5107 if (PL_curcop && PL_curcop->cop_hints & HINT_LEXICAL_IO) {
5109 = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
5114 type = SvPV_const(layers, len);
5115 if (type && mode && mode[0] != 'r') {
5117 * Skip to write part, which is separated by a '\0'
5119 STRLEN read_len = strlen(type);
5120 if (read_len < len) {
5121 type += read_len + 1;
5131 #undef PerlIO_setpos
5133 PerlIO_setpos(PerlIO *f, SV *pos)
5138 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5139 if (f && len == sizeof(Off_t))
5140 return PerlIO_seek(f, *posn, SEEK_SET);
5142 SETERRNO(EINVAL, SS_IVCHAN);
5146 #undef PerlIO_setpos
5148 PerlIO_setpos(PerlIO *f, SV *pos)
5153 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5154 if (f && len == sizeof(Fpos_t)) {
5155 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5156 return fsetpos64(f, fpos);
5158 return fsetpos(f, fpos);
5162 SETERRNO(EINVAL, SS_IVCHAN);
5168 #undef PerlIO_getpos
5170 PerlIO_getpos(PerlIO *f, SV *pos)
5173 Off_t posn = PerlIO_tell(f);
5174 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5175 return (posn == (Off_t) - 1) ? -1 : 0;
5178 #undef PerlIO_getpos
5180 PerlIO_getpos(PerlIO *f, SV *pos)
5185 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5186 code = fgetpos64(f, &fpos);
5188 code = fgetpos(f, &fpos);
5190 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5195 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5198 vprintf(char *pat, char *args)
5200 _doprnt(pat, args, stdout);
5201 return 0; /* wrong, but perl doesn't use the return
5206 vfprintf(FILE *fd, char *pat, char *args)
5208 _doprnt(pat, args, fd);
5209 return 0; /* wrong, but perl doesn't use the return
5215 #ifndef PerlIO_vsprintf
5217 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5220 const int val = my_vsnprintf(s, n > 0 ? n : 0, fmt, ap);
5221 PERL_UNUSED_CONTEXT;
5223 #ifndef PERL_MY_VSNPRINTF_GUARDED
5224 if (val < 0 || (n > 0 ? val >= n : 0)) {
5225 Perl_croak(aTHX_ "panic: my_vsnprintf overflow in PerlIO_vsprintf\n");
5232 #ifndef PerlIO_sprintf
5234 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5239 result = PerlIO_vsprintf(s, n, fmt, ap);
5247 * c-indentation-style: bsd
5249 * indent-tabs-mode: t
5252 * ex: set ts=8 sts=4 sw=4 noet: