3 * Copyright (c) 1996-2006, Nick Ing-Simmons
4 * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public License
7 * or the Artistic License, as specified in the README file.
11 * Hour after hour for nearly three weary days he had jogged up and down,
12 * over passes, and through long dales, and across many streams.
14 * [pp.791-792 of _The Lord of the Rings_, V/iii: "The Muster of Rohan"]
17 /* This file contains the functions needed to implement PerlIO, which
18 * is Perl's private replacement for the C stdio library. This is used
19 * by default unless you compile with -Uuseperlio or run with
20 * PERLIO=:stdio (but don't do this unless you know what you're doing)
24 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
25 * at the dispatch tables, even when we do not need it for other reasons.
26 * Invent a dSYS macro to abstract this out
28 #ifdef PERL_IMPLICIT_SYS
34 #define PERLIO_NOT_STDIO 0
36 * This file provides those parts of PerlIO abstraction
37 * which are not #defined in perlio.h.
38 * Which these are depends on various Configure #ifdef's
42 #define PERL_IN_PERLIO_C
45 #ifdef PERL_IMPLICIT_CONTEXT
53 /* Missing proto on LynxOS */
61 #define PerlIO_lockcnt(f) (((PerlIOl*)(f))->head->flags)
63 /* Call the callback or PerlIOBase, and return failure. */
64 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
65 if (PerlIOValid(f)) { \
66 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
67 if (tab && tab->callback) \
68 return (*tab->callback) args; \
70 return PerlIOBase_ ## base args; \
73 SETERRNO(EBADF, SS_IVCHAN); \
76 /* Call the callback or fail, and return failure. */
77 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
78 if (PerlIOValid(f)) { \
79 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
80 if (tab && tab->callback) \
81 return (*tab->callback) args; \
82 SETERRNO(EINVAL, LIB_INVARG); \
85 SETERRNO(EBADF, SS_IVCHAN); \
88 /* Call the callback or PerlIOBase, and be void. */
89 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
90 if (PerlIOValid(f)) { \
91 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
92 if (tab && tab->callback) \
93 (*tab->callback) args; \
95 PerlIOBase_ ## base args; \
98 SETERRNO(EBADF, SS_IVCHAN)
100 /* Call the callback or fail, and be void. */
101 #define Perl_PerlIO_or_fail_void(f, callback, args) \
102 if (PerlIOValid(f)) { \
103 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
104 if (tab && tab->callback) \
105 (*tab->callback) args; \
107 SETERRNO(EINVAL, LIB_INVARG); \
110 SETERRNO(EBADF, SS_IVCHAN)
112 #if defined(__osf__) && _XOPEN_SOURCE < 500
113 extern int fseeko(FILE *, off_t, int);
114 extern off_t ftello(FILE *);
117 #define NATIVE_0xd CR_NATIVE
118 #define NATIVE_0xa LF_NATIVE
120 EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
123 perlsio_binmode(FILE *fp, int iotype, int mode)
126 * This used to be contents of do_binmode in doio.c
130 PERL_UNUSED_ARG(iotype);
132 if (PerlLIO_setmode(fp, mode) != -1) {
134 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
141 # if defined(USEMYBINMODE)
143 # if defined(__CYGWIN__)
144 PERL_UNUSED_ARG(iotype);
146 if (my_binmode(fp, iotype, mode) != FALSE)
152 PERL_UNUSED_ARG(iotype);
153 PERL_UNUSED_ARG(mode);
160 #define O_ACCMODE 3 /* Assume traditional implementation */
164 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
166 const int result = rawmode & O_ACCMODE;
171 ptype = IoTYPE_RDONLY;
174 ptype = IoTYPE_WRONLY;
182 *writing = (result != O_RDONLY);
184 if (result == O_RDONLY) {
188 else if (rawmode & O_APPEND) {
190 if (result != O_WRONLY)
195 if (result == O_WRONLY)
202 if (rawmode & O_BINARY)
208 #ifndef PERLIO_LAYERS
210 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
212 if (!names || !*names
213 || strEQ(names, ":crlf")
214 || strEQ(names, ":raw")
215 || strEQ(names, ":bytes")
219 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
227 PerlIO_destruct(pTHX)
232 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
234 return perlsio_binmode(fp, iotype, mode);
238 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
240 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
243 #ifdef PERL_IMPLICIT_SYS
244 return PerlSIO_fdupopen(f);
247 return win32_fdupopen(f);
250 const int fd = PerlLIO_dup(PerlIO_fileno(f));
254 const int omode = djgpp_get_stream_mode(f);
256 const int omode = fcntl(fd, F_GETFL);
258 PerlIO_intmode2str(omode,mode,NULL);
259 /* the r+ is a hack */
260 return PerlIO_fdopen(fd, mode);
265 SETERRNO(EBADF, SS_IVCHAN);
275 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
279 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
280 int imode, int perm, PerlIO *old, int narg, SV **args)
284 Perl_croak(aTHX_ "More than one argument to open");
286 if (*args == &PL_sv_undef)
287 return PerlIO_tmpfile();
290 const char *name = SvPV_const(*args, len);
291 if (!IS_SAFE_PATHNAME(name, len, "open"))
294 if (*mode == IoTYPE_NUMERIC) {
295 fd = PerlLIO_open3(name, imode, perm);
297 return PerlIO_fdopen(fd, mode + 1);
300 return PerlIO_reopen(name, mode, old);
303 return PerlIO_open(name, mode);
308 return PerlIO_fdopen(fd, (char *) mode);
313 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
314 XS(XS_PerlIO__Layer__find)
318 Perl_croak(aTHX_ "Usage class->find(name[,load])");
320 const char * const name = SvPV_nolen_const(ST(1));
321 ST(0) = (strEQ(name, "crlf")
322 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
329 Perl_boot_core_PerlIO(pTHX)
331 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
337 #ifdef PERLIO_IS_STDIO
344 * Does nothing (yet) except force this file to be included in perl
345 * binary. That allows this file to force inclusion of other functions
346 * that may be required by loadable extensions e.g. for
347 * FileHandle::tmpfile
351 #undef PerlIO_tmpfile
358 #else /* PERLIO_IS_STDIO */
360 /*======================================================================================*/
362 * Implement all the PerlIO interface ourselves.
368 PerlIO_debug(const char *fmt, ...)
373 if (!PL_perlio_debug_fd) {
375 PerlProc_getuid() == PerlProc_geteuid() &&
376 PerlProc_getgid() == PerlProc_getegid()) {
377 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
380 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
382 PL_perlio_debug_fd = -1;
384 /* tainting or set*id, so ignore the environment, and ensure we
385 skip these tests next time through. */
386 PL_perlio_debug_fd = -1;
389 if (PL_perlio_debug_fd > 0) {
392 const char * const s = CopFILE(PL_curcop);
393 /* Use fixed buffer as sv_catpvf etc. needs SVs */
395 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
396 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
397 rc = PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2);
399 const char *s = CopFILE(PL_curcop);
401 SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
402 (IV) CopLINE(PL_curcop));
403 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
405 s = SvPV_const(sv, len);
406 rc = PerlLIO_write(PL_perlio_debug_fd, s, len);
409 /* silently ignore failures */
415 /*--------------------------------------------------------------------------------------*/
418 * Inner level routines
421 /* check that the head field of each layer points back to the head */
424 # define VERIFY_HEAD(f) PerlIO_verify_head(aTHX_ f)
426 PerlIO_verify_head(pTHX_ PerlIO *f)
432 p = head = PerlIOBase(f)->head;
435 assert(p->head == head);
436 if (p == (PerlIOl*)f)
443 # define VERIFY_HEAD(f)
448 * Table of pointers to the PerlIO structs (malloc'ed)
450 #define PERLIO_TABLE_SIZE 64
453 PerlIO_init_table(pTHX)
457 Newxz(PL_perlio, PERLIO_TABLE_SIZE, PerlIOl);
463 PerlIO_allocate(pTHX)
467 * Find a free slot in the table, allocating new table as necessary
472 while ((f = *last)) {
474 last = (PerlIOl **) (f);
475 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
476 if (!((++f)->next)) {
477 f->flags = 0; /* lockcnt */
484 Newxz(f,PERLIO_TABLE_SIZE,PerlIOl);
488 *last = (PerlIOl*) f++;
489 f->flags = 0; /* lockcnt */
495 #undef PerlIO_fdupopen
497 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
499 if (PerlIOValid(f)) {
500 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
501 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
503 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
505 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
509 SETERRNO(EBADF, SS_IVCHAN);
515 PerlIO_cleantable(pTHX_ PerlIOl **tablep)
517 PerlIOl * const table = *tablep;
520 PerlIO_cleantable(aTHX_(PerlIOl **) & (table[0]));
521 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
522 PerlIOl * const f = table + i;
524 PerlIO_close(&(f->next));
534 PerlIO_list_alloc(pTHX)
538 Newxz(list, 1, PerlIO_list_t);
544 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
547 if (--list->refcnt == 0) {
550 for (i = 0; i < list->cur; i++)
551 SvREFCNT_dec(list->array[i].arg);
552 Safefree(list->array);
560 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
566 if (list->cur >= list->len) {
569 Renew(list->array, list->len, PerlIO_pair_t);
571 Newx(list->array, list->len, PerlIO_pair_t);
573 p = &(list->array[list->cur++]);
575 if ((p->arg = arg)) {
576 SvREFCNT_inc_simple_void_NN(arg);
581 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
583 PerlIO_list_t *list = NULL;
586 list = PerlIO_list_alloc(aTHX);
587 for (i=0; i < proto->cur; i++) {
588 SV *arg = proto->array[i].arg;
591 arg = sv_dup(arg, param);
593 PERL_UNUSED_ARG(param);
595 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
602 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
605 PerlIOl **table = &proto->Iperlio;
608 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
609 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
610 PerlIO_init_table(aTHX);
611 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
612 while ((f = *table)) {
614 table = (PerlIOl **) (f++);
615 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
617 (void) fp_dup(&(f->next), 0, param);
624 PERL_UNUSED_ARG(proto);
625 PERL_UNUSED_ARG(param);
630 PerlIO_destruct(pTHX)
633 PerlIOl **table = &PL_perlio;
636 PerlIO_debug("Destruct %p\n",(void*)aTHX);
638 while ((f = *table)) {
640 table = (PerlIOl **) (f++);
641 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
642 PerlIO *x = &(f->next);
645 if (l->tab && l->tab->kind & PERLIO_K_DESTRUCT) {
646 PerlIO_debug("Destruct popping %s\n", l->tab->name);
660 PerlIO_pop(pTHX_ PerlIO *f)
662 const PerlIOl *l = *f;
665 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f,
666 l->tab ? l->tab->name : "(Null)");
667 if (l->tab && l->tab->Popped) {
669 * If popped returns non-zero do not free its layer structure
670 * it has either done so itself, or it is shared and still in
673 if ((*l->tab->Popped) (aTHX_ f) != 0)
676 if (PerlIO_lockcnt(f)) {
677 /* we're in use; defer freeing the structure */
678 PerlIOBase(f)->flags = PERLIO_F_CLEARED;
679 PerlIOBase(f)->tab = NULL;
689 /* Return as an array the stack of layers on a filehandle. Note that
690 * the stack is returned top-first in the array, and there are three
691 * times as many array elements as there are layers in the stack: the
692 * first element of a layer triplet is the name, the second one is the
693 * arguments, and the third one is the flags. */
696 PerlIO_get_layers(pTHX_ PerlIO *f)
699 AV * const av = newAV();
701 if (PerlIOValid(f)) {
702 PerlIOl *l = PerlIOBase(f);
705 /* There is some collusion in the implementation of
706 XS_PerlIO_get_layers - it knows that name and flags are
707 generated as fresh SVs here, and takes advantage of that to
708 "copy" them by taking a reference. If it changes here, it needs
709 to change there too. */
710 SV * const name = l->tab && l->tab->name ?
711 newSVpv(l->tab->name, 0) : &PL_sv_undef;
712 SV * const arg = l->tab && l->tab->Getarg ?
713 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
716 av_push(av, newSViv((IV)l->flags));
724 /*--------------------------------------------------------------------------------------*/
726 * XS Interface for perl code
730 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
734 if ((SSize_t) len <= 0)
736 for (i = 0; i < PL_known_layers->cur; i++) {
737 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
738 const STRLEN this_len = strlen(f->name);
739 if (this_len == len && memEQ(f->name, name, len)) {
740 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
744 if (load && PL_subname && PL_def_layerlist
745 && PL_def_layerlist->cur >= 2) {
746 if (PL_in_load_module) {
747 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
750 SV * const pkgsv = newSVpvs("PerlIO");
751 SV * const layer = newSVpvn(name, len);
752 CV * const cv = get_cvs("PerlIO::Layer::NoWarnings", 0);
754 SAVEBOOL(PL_in_load_module);
756 SAVEGENERICSV(PL_warnhook);
757 PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
759 PL_in_load_module = TRUE;
761 * The two SVs are magically freed by load_module
763 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
765 return PerlIO_find_layer(aTHX_ name, len, 0);
768 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
772 #ifdef USE_ATTRIBUTES_FOR_PERLIO
775 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
778 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
779 PerlIO * const ifp = IoIFP(io);
780 PerlIO * const ofp = IoOFP(io);
781 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
782 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
788 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
791 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
792 PerlIO * const ifp = IoIFP(io);
793 PerlIO * const ofp = IoOFP(io);
794 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
795 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
801 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
803 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
808 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
810 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
814 MGVTBL perlio_vtab = {
822 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
823 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
826 SV * const sv = SvRV(ST(1));
827 AV * const av = newAV();
831 sv_magic(sv, MUTABLE_SV(av), PERL_MAGIC_ext, NULL, 0);
833 mg = mg_find(sv, PERL_MAGIC_ext);
834 mg->mg_virtual = &perlio_vtab;
836 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
837 for (i = 2; i < items; i++) {
839 const char * const name = SvPV_const(ST(i), len);
840 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
842 av_push(av, SvREFCNT_inc_simple_NN(layer));
853 #endif /* USE_ATTIBUTES_FOR_PERLIO */
856 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
858 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
859 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
863 XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
864 XS(XS_PerlIO__Layer__NoWarnings)
866 /* This is used as a %SIG{__WARN__} handler to suppress warnings
867 during loading of layers.
873 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
877 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
878 XS(XS_PerlIO__Layer__find)
884 Perl_croak(aTHX_ "Usage class->find(name[,load])");
887 const char * const name = SvPV_const(ST(1), len);
888 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
889 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
891 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
898 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
901 if (!PL_known_layers)
902 PL_known_layers = PerlIO_list_alloc(aTHX);
903 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
904 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
908 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
912 const char *s = names;
914 while (isSPACE(*s) || *s == ':')
919 const char *as = NULL;
921 if (!isIDFIRST(*s)) {
923 * Message is consistent with how attribute lists are
924 * passed. Even though this means "foo : : bar" is
925 * seen as an invalid separator character.
927 const char q = ((*s == '\'') ? '"' : '\'');
928 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
929 "Invalid separator character %c%c%c in PerlIO layer specification %s",
931 SETERRNO(EINVAL, LIB_INVARG);
936 } while (isWORDCHAR(*e));
952 * It's a nul terminated string, not allowed
953 * to \ the terminating null. Anything other
954 * character is passed over.
964 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
965 "Argument list not closed for PerlIO layer \"%.*s\"",
977 PerlIO_funcs * const layer =
978 PerlIO_find_layer(aTHX_ s, llen, 1);
982 arg = newSVpvn(as, alen);
983 PerlIO_list_push(aTHX_ av, layer,
984 (arg) ? arg : &PL_sv_undef);
988 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1001 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1004 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1005 #ifdef PERLIO_USING_CRLF
1008 if (PerlIO_stdio.Set_ptrcnt)
1009 tab = &PerlIO_stdio;
1011 PerlIO_debug("Pushing %s\n", tab->name);
1012 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1017 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1019 return av->array[n].arg;
1023 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1025 if (n >= 0 && n < av->cur) {
1026 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1027 av->array[n].funcs->name);
1028 return av->array[n].funcs;
1031 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1036 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1038 PERL_UNUSED_ARG(mode);
1039 PERL_UNUSED_ARG(arg);
1040 PERL_UNUSED_ARG(tab);
1041 if (PerlIOValid(f)) {
1043 PerlIO_pop(aTHX_ f);
1049 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1050 sizeof(PerlIO_funcs),
1053 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1073 NULL, /* get_base */
1074 NULL, /* get_bufsiz */
1077 NULL, /* set_ptrcnt */
1081 PerlIO_default_layers(pTHX)
1084 if (!PL_def_layerlist) {
1085 const char * const s = TAINTING_get ? NULL : PerlEnv_getenv("PERLIO");
1086 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1087 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1088 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1090 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1092 osLayer = &PerlIO_win32;
1095 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1096 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1097 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1098 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1099 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1100 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1101 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1102 PerlIO_list_push(aTHX_ PL_def_layerlist,
1103 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1106 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1109 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1112 if (PL_def_layerlist->cur < 2) {
1113 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1115 return PL_def_layerlist;
1119 Perl_boot_core_PerlIO(pTHX)
1121 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1122 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1125 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1126 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1130 PerlIO_default_layer(pTHX_ I32 n)
1133 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1136 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1139 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1140 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1143 PerlIO_stdstreams(pTHX)
1147 PerlIO_init_table(aTHX);
1148 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1149 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1150 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1155 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1158 if (tab->fsize != sizeof(PerlIO_funcs)) {
1160 "%s (%"UVuf") does not match %s (%"UVuf")",
1161 "PerlIO layer function table size", (UV)tab->fsize,
1162 "size expected by this perl", (UV)sizeof(PerlIO_funcs) );
1166 if (tab->size < sizeof(PerlIOl)) {
1168 "%s (%"UVuf") smaller than %s (%"UVuf")",
1169 "PerlIO layer instance size", (UV)tab->size,
1170 "size expected by this perl", (UV)sizeof(PerlIOl) );
1172 /* Real layer with a data area */
1175 Newxz(temp, tab->size, char);
1179 l->tab = (PerlIO_funcs*) tab;
1180 l->head = ((PerlIOl*)f)->head;
1182 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1183 (void*)f, tab->name,
1184 (mode) ? mode : "(Null)", (void*)arg);
1185 if (*l->tab->Pushed &&
1187 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1188 PerlIO_pop(aTHX_ f);
1197 /* Pseudo-layer where push does its own stack adjust */
1198 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1199 (mode) ? mode : "(Null)", (void*)arg);
1201 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1209 PerlIOBase_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1210 IV n, const char *mode, int fd, int imode, int perm,
1211 PerlIO *old, int narg, SV **args)
1213 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_layer(aTHX_ 0));
1214 if (tab && tab->Open) {
1215 PerlIO* ret = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm, old, narg, args);
1216 if (ret && PerlIO_push(aTHX_ ret, self, mode, PerlIOArg) == NULL) {
1222 SETERRNO(EINVAL, LIB_INVARG);
1227 PerlIOBase_binmode(pTHX_ PerlIO *f)
1229 if (PerlIOValid(f)) {
1230 /* Is layer suitable for raw stream ? */
1231 if (PerlIOBase(f)->tab && PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1232 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1233 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1236 /* Not suitable - pop it */
1237 PerlIO_pop(aTHX_ f);
1245 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1247 PERL_UNUSED_ARG(mode);
1248 PERL_UNUSED_ARG(arg);
1249 PERL_UNUSED_ARG(tab);
1251 if (PerlIOValid(f)) {
1256 * Strip all layers that are not suitable for a raw stream
1259 while (t && (l = *t)) {
1260 if (l->tab && l->tab->Binmode) {
1261 /* Has a handler - normal case */
1262 if ((*l->tab->Binmode)(aTHX_ t) == 0) {
1264 /* Layer still there - move down a layer */
1273 /* No handler - pop it */
1274 PerlIO_pop(aTHX_ t);
1277 if (PerlIOValid(f)) {
1278 PerlIO_debug(":raw f=%p :%s\n", (void*)f,
1279 PerlIOBase(f)->tab ? PerlIOBase(f)->tab->name : "(Null)");
1287 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1288 PerlIO_list_t *layers, IV n, IV max)
1292 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1294 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1305 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1309 save_scalar(PL_errgv);
1311 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1312 code = PerlIO_parse_layers(aTHX_ layers, names);
1314 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1316 PerlIO_list_free(aTHX_ layers);
1323 /*--------------------------------------------------------------------------------------*/
1325 * Given the abstraction above the public API functions
1329 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1331 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1332 (PerlIOBase(f) && PerlIOBase(f)->tab) ?
1333 PerlIOBase(f)->tab->name : "(Null)",
1334 iotype, mode, (names) ? names : "(Null)");
1337 /* Do not flush etc. if (e.g.) switching encodings.
1338 if a pushed layer knows it needs to flush lower layers
1339 (for example :unix which is never going to call them)
1340 it can do the flush when it is pushed.
1342 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1345 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1346 #ifdef PERLIO_USING_CRLF
1347 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1348 O_BINARY so we can look for it in mode.
1350 if (!(mode & O_BINARY)) {
1352 /* FIXME?: Looking down the layer stack seems wrong,
1353 but is a way of reaching past (say) an encoding layer
1354 to flip CRLF-ness of the layer(s) below
1357 /* Perhaps we should turn on bottom-most aware layer
1358 e.g. Ilya's idea that UNIX TTY could serve
1360 if (PerlIOBase(f)->tab &&
1361 PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF)
1363 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1364 /* Not in text mode - flush any pending stuff and flip it */
1366 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1368 /* Only need to turn it on in one layer so we are done */
1373 /* Not finding a CRLF aware layer presumably means we are binary
1374 which is not what was requested - so we failed
1375 We _could_ push :crlf layer but so could caller
1380 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1381 So code that used to be here is now in PerlIORaw_pushed().
1383 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1388 PerlIO__close(pTHX_ PerlIO *f)
1390 if (PerlIOValid(f)) {
1391 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1392 if (tab && tab->Close)
1393 return (*tab->Close)(aTHX_ f);
1395 return PerlIOBase_close(aTHX_ f);
1398 SETERRNO(EBADF, SS_IVCHAN);
1404 Perl_PerlIO_close(pTHX_ PerlIO *f)
1406 const int code = PerlIO__close(aTHX_ f);
1407 while (PerlIOValid(f)) {
1408 PerlIO_pop(aTHX_ f);
1409 if (PerlIO_lockcnt(f))
1410 /* we're in use; the 'pop' deferred freeing the structure */
1417 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1420 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1424 static PerlIO_funcs *
1425 PerlIO_layer_from_ref(pTHX_ SV *sv)
1429 * For any scalar type load the handler which is bundled with perl
1431 if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
1432 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1433 /* This isn't supposed to happen, since PerlIO::scalar is core,
1434 * but could happen anyway in smaller installs or with PAR */
1436 /* diag_listed_as: Unknown PerlIO layer "%s" */
1437 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1442 * For other types allow if layer is known but don't try and load it
1444 switch (SvTYPE(sv)) {
1446 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1448 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1450 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1452 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1459 PerlIO_resolve_layers(pTHX_ const char *layers,
1460 const char *mode, int narg, SV **args)
1463 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1466 PerlIO_stdstreams(aTHX);
1468 SV * const arg = *args;
1470 * If it is a reference but not an object see if we have a handler
1473 if (SvROK(arg) && !sv_isobject(arg)) {
1474 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1476 def = PerlIO_list_alloc(aTHX);
1477 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1481 * Don't fail if handler cannot be found :via(...) etc. may do
1482 * something sensible else we will just stringfy and open
1487 if (!layers || !*layers)
1488 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1489 if (layers && *layers) {
1492 av = PerlIO_clone_list(aTHX_ def, NULL);
1497 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1501 PerlIO_list_free(aTHX_ av);
1513 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1514 int imode, int perm, PerlIO *f, int narg, SV **args)
1517 if (!f && narg == 1 && *args == &PL_sv_undef) {
1518 if ((f = PerlIO_tmpfile())) {
1519 if (!layers || !*layers)
1520 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1521 if (layers && *layers)
1522 PerlIO_apply_layers(aTHX_ f, mode, layers);
1526 PerlIO_list_t *layera;
1528 PerlIO_funcs *tab = NULL;
1529 if (PerlIOValid(f)) {
1531 * This is "reopen" - it is not tested as perl does not use it
1535 layera = PerlIO_list_alloc(aTHX);
1538 if (l->tab && l->tab->Getarg)
1539 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1540 PerlIO_list_push(aTHX_ layera, l->tab,
1541 (arg) ? arg : &PL_sv_undef);
1543 l = *PerlIONext(&l);
1547 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1553 * Start at "top" of layer stack
1555 n = layera->cur - 1;
1557 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1566 * Found that layer 'n' can do opens - call it
1568 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1569 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1571 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1572 tab->name, layers ? layers : "(Null)", mode, fd,
1573 imode, perm, (void*)f, narg, (void*)args);
1575 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1578 SETERRNO(EINVAL, LIB_INVARG);
1582 if (n + 1 < layera->cur) {
1584 * More layers above the one that we used to open -
1587 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1588 /* If pushing layers fails close the file */
1595 PerlIO_list_free(aTHX_ layera);
1602 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1604 PERL_ARGS_ASSERT_PERLIO_READ;
1606 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1610 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1612 PERL_ARGS_ASSERT_PERLIO_UNREAD;
1614 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1618 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1620 PERL_ARGS_ASSERT_PERLIO_WRITE;
1622 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1626 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1628 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1632 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1634 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1638 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1643 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1645 if (tab && tab->Flush)
1646 return (*tab->Flush) (aTHX_ f);
1648 return 0; /* If no Flush defined, silently succeed. */
1651 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1652 SETERRNO(EBADF, SS_IVCHAN);
1658 * Is it good API design to do flush-all on NULL, a potentially
1659 * erroneous input? Maybe some magical value (PerlIO*
1660 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1661 * things on fflush(NULL), but should we be bound by their design
1664 PerlIOl **table = &PL_perlio;
1667 while ((ff = *table)) {
1669 table = (PerlIOl **) (ff++);
1670 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1671 if (ff->next && PerlIO_flush(&(ff->next)) != 0)
1681 PerlIOBase_flush_linebuf(pTHX)
1684 PerlIOl **table = &PL_perlio;
1686 while ((f = *table)) {
1688 table = (PerlIOl **) (f++);
1689 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1691 && (PerlIOBase(&(f->next))->
1692 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1693 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1694 PerlIO_flush(&(f->next));
1701 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1703 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1707 PerlIO_isutf8(PerlIO *f)
1710 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1712 SETERRNO(EBADF, SS_IVCHAN);
1718 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1720 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1724 Perl_PerlIO_error(pTHX_ PerlIO *f)
1726 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1730 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1732 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1736 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1738 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1742 PerlIO_has_base(PerlIO *f)
1744 if (PerlIOValid(f)) {
1745 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1748 return (tab->Get_base != NULL);
1755 PerlIO_fast_gets(PerlIO *f)
1757 if (PerlIOValid(f)) {
1758 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
1759 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1762 return (tab->Set_ptrcnt != NULL);
1770 PerlIO_has_cntptr(PerlIO *f)
1772 if (PerlIOValid(f)) {
1773 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1776 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1783 PerlIO_canset_cnt(PerlIO *f)
1785 if (PerlIOValid(f)) {
1786 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1789 return (tab->Set_ptrcnt != NULL);
1796 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1798 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1802 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1804 /* Note that Get_bufsiz returns a Size_t */
1805 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1809 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1811 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1815 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1817 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1821 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, SSize_t cnt)
1823 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1827 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
1829 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1833 /*--------------------------------------------------------------------------------------*/
1835 * utf8 and raw dummy layers
1839 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1841 PERL_UNUSED_CONTEXT;
1842 PERL_UNUSED_ARG(mode);
1843 PERL_UNUSED_ARG(arg);
1844 if (PerlIOValid(f)) {
1845 if (tab && tab->kind & PERLIO_K_UTF8)
1846 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1848 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1854 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1855 sizeof(PerlIO_funcs),
1858 PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
1878 NULL, /* get_base */
1879 NULL, /* get_bufsiz */
1882 NULL, /* set_ptrcnt */
1885 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1886 sizeof(PerlIO_funcs),
1889 PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
1909 NULL, /* get_base */
1910 NULL, /* get_bufsiz */
1913 NULL, /* set_ptrcnt */
1916 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1917 sizeof(PerlIO_funcs),
1940 NULL, /* get_base */
1941 NULL, /* get_bufsiz */
1944 NULL, /* set_ptrcnt */
1946 /*--------------------------------------------------------------------------------------*/
1947 /*--------------------------------------------------------------------------------------*/
1949 * "Methods" of the "base class"
1953 PerlIOBase_fileno(pTHX_ PerlIO *f)
1955 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1959 PerlIO_modestr(PerlIO * f, char *buf)
1962 if (PerlIOValid(f)) {
1963 const IV flags = PerlIOBase(f)->flags;
1964 if (flags & PERLIO_F_APPEND) {
1966 if (flags & PERLIO_F_CANREAD) {
1970 else if (flags & PERLIO_F_CANREAD) {
1972 if (flags & PERLIO_F_CANWRITE)
1975 else if (flags & PERLIO_F_CANWRITE) {
1977 if (flags & PERLIO_F_CANREAD) {
1981 #ifdef PERLIO_USING_CRLF
1982 if (!(flags & PERLIO_F_CRLF))
1992 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1994 PerlIOl * const l = PerlIOBase(f);
1995 PERL_UNUSED_CONTEXT;
1996 PERL_UNUSED_ARG(arg);
1998 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1999 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
2000 if (tab && tab->Set_ptrcnt != NULL)
2001 l->flags |= PERLIO_F_FASTGETS;
2003 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2007 l->flags |= PERLIO_F_CANREAD;
2010 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2013 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2016 SETERRNO(EINVAL, LIB_INVARG);
2022 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2025 l->flags &= ~PERLIO_F_CRLF;
2028 l->flags |= PERLIO_F_CRLF;
2031 SETERRNO(EINVAL, LIB_INVARG);
2038 l->flags |= l->next->flags &
2039 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2044 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2045 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2046 l->flags, PerlIO_modestr(f, temp));
2052 PerlIOBase_popped(pTHX_ PerlIO *f)
2054 PERL_UNUSED_CONTEXT;
2060 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2063 * Save the position as current head considers it
2065 const Off_t old = PerlIO_tell(f);
2066 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2067 PerlIOSelf(f, PerlIOBuf)->posn = old;
2068 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2072 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2074 STDCHAR *buf = (STDCHAR *) vbuf;
2076 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2077 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2078 SETERRNO(EBADF, SS_IVCHAN);
2084 SSize_t avail = PerlIO_get_cnt(f);
2087 take = (((SSize_t) count >= 0) && ((SSize_t)count < avail)) ? (SSize_t)count : avail;
2089 STDCHAR *ptr = PerlIO_get_ptr(f);
2090 Copy(ptr, buf, take, STDCHAR);
2091 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2094 if (avail == 0) /* set_ptrcnt could have reset avail */
2097 if (count > 0 && avail <= 0) {
2098 if (PerlIO_fill(f) != 0)
2103 return (buf - (STDCHAR *) vbuf);
2109 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2111 PERL_UNUSED_CONTEXT;
2117 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2119 PERL_UNUSED_CONTEXT;
2125 PerlIOBase_close(pTHX_ PerlIO *f)
2128 if (PerlIOValid(f)) {
2129 PerlIO *n = PerlIONext(f);
2130 code = PerlIO_flush(f);
2131 PerlIOBase(f)->flags &=
2132 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2133 while (PerlIOValid(n)) {
2134 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2135 if (tab && tab->Close) {
2136 if ((*tab->Close)(aTHX_ n) != 0)
2141 PerlIOBase(n)->flags &=
2142 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2148 SETERRNO(EBADF, SS_IVCHAN);
2154 PerlIOBase_eof(pTHX_ PerlIO *f)
2156 PERL_UNUSED_CONTEXT;
2157 if (PerlIOValid(f)) {
2158 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2164 PerlIOBase_error(pTHX_ PerlIO *f)
2166 PERL_UNUSED_CONTEXT;
2167 if (PerlIOValid(f)) {
2168 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2174 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2176 if (PerlIOValid(f)) {
2177 PerlIO * const n = PerlIONext(f);
2178 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2185 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2187 PERL_UNUSED_CONTEXT;
2188 if (PerlIOValid(f)) {
2189 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2194 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2200 arg = sv_dup(arg, param);
2201 SvREFCNT_inc_simple_void_NN(arg);
2205 return newSVsv(arg);
2208 PERL_UNUSED_ARG(param);
2209 return newSVsv(arg);
2214 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2216 PerlIO * const nexto = PerlIONext(o);
2217 if (PerlIOValid(nexto)) {
2218 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2219 if (tab && tab->Dup)
2220 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2222 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2225 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2228 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2229 self ? self->name : "(Null)",
2230 (void*)f, (void*)o, (void*)param);
2231 if (self && self->Getarg)
2232 arg = (*self->Getarg)(aTHX_ o, param, flags);
2233 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2234 if (f && PerlIOBase(o)->flags & PERLIO_F_UTF8)
2235 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
2241 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2243 /* Must be called with PL_perlio_mutex locked. */
2245 S_more_refcounted_fds(pTHX_ const int new_fd) {
2247 const int old_max = PL_perlio_fd_refcnt_size;
2248 const int new_max = 16 + (new_fd & ~15);
2251 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2252 old_max, new_fd, new_max);
2254 if (new_fd < old_max) {
2258 assert (new_max > new_fd);
2260 /* Use plain realloc() since we need this memory to be really
2261 * global and visible to all the interpreters and/or threads. */
2262 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2266 MUTEX_UNLOCK(&PL_perlio_mutex);
2271 PL_perlio_fd_refcnt_size = new_max;
2272 PL_perlio_fd_refcnt = new_array;
2274 PerlIO_debug("Zeroing %p, %d\n",
2275 (void*)(new_array + old_max),
2278 Zero(new_array + old_max, new_max - old_max, int);
2285 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2286 PERL_UNUSED_CONTEXT;
2290 PerlIOUnix_refcnt_inc(int fd)
2297 MUTEX_LOCK(&PL_perlio_mutex);
2299 if (fd >= PL_perlio_fd_refcnt_size)
2300 S_more_refcounted_fds(aTHX_ fd);
2302 PL_perlio_fd_refcnt[fd]++;
2303 if (PL_perlio_fd_refcnt[fd] <= 0) {
2304 /* diag_listed_as: refcnt_inc: fd %d%s */
2305 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2306 fd, PL_perlio_fd_refcnt[fd]);
2308 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2309 fd, PL_perlio_fd_refcnt[fd]);
2312 MUTEX_UNLOCK(&PL_perlio_mutex);
2315 /* diag_listed_as: refcnt_inc: fd %d%s */
2316 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2321 PerlIOUnix_refcnt_dec(int fd)
2327 MUTEX_LOCK(&PL_perlio_mutex);
2329 if (fd >= PL_perlio_fd_refcnt_size) {
2330 /* diag_listed_as: refcnt_dec: fd %d%s */
2331 Perl_croak_nocontext("refcnt_dec: fd %d >= refcnt_size %d\n",
2332 fd, PL_perlio_fd_refcnt_size);
2334 if (PL_perlio_fd_refcnt[fd] <= 0) {
2335 /* diag_listed_as: refcnt_dec: fd %d%s */
2336 Perl_croak_nocontext("refcnt_dec: fd %d: %d <= 0\n",
2337 fd, PL_perlio_fd_refcnt[fd]);
2339 cnt = --PL_perlio_fd_refcnt[fd];
2340 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2342 MUTEX_UNLOCK(&PL_perlio_mutex);
2345 /* diag_listed_as: refcnt_dec: fd %d%s */
2346 Perl_croak_nocontext("refcnt_dec: fd %d < 0\n", fd);
2352 PerlIOUnix_refcnt(int fd)
2359 MUTEX_LOCK(&PL_perlio_mutex);
2361 if (fd >= PL_perlio_fd_refcnt_size) {
2362 /* diag_listed_as: refcnt: fd %d%s */
2363 Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
2364 fd, PL_perlio_fd_refcnt_size);
2366 if (PL_perlio_fd_refcnt[fd] <= 0) {
2367 /* diag_listed_as: refcnt: fd %d%s */
2368 Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
2369 fd, PL_perlio_fd_refcnt[fd]);
2371 cnt = PL_perlio_fd_refcnt[fd];
2373 MUTEX_UNLOCK(&PL_perlio_mutex);
2376 /* diag_listed_as: refcnt: fd %d%s */
2377 Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
2383 PerlIO_cleanup(pTHX)
2388 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2390 PerlIO_debug("Cleanup layers\n");
2393 /* Raise STDIN..STDERR refcount so we don't close them */
2394 for (i=0; i < 3; i++)
2395 PerlIOUnix_refcnt_inc(i);
2396 PerlIO_cleantable(aTHX_ &PL_perlio);
2397 /* Restore STDIN..STDERR refcount */
2398 for (i=0; i < 3; i++)
2399 PerlIOUnix_refcnt_dec(i);
2401 if (PL_known_layers) {
2402 PerlIO_list_free(aTHX_ PL_known_layers);
2403 PL_known_layers = NULL;
2405 if (PL_def_layerlist) {
2406 PerlIO_list_free(aTHX_ PL_def_layerlist);
2407 PL_def_layerlist = NULL;
2411 void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
2415 /* XXX we can't rely on an interpreter being present at this late stage,
2416 XXX so we can't use a function like PerlLIO_write that relies on one
2417 being present (at least in win32) :-(.
2422 /* By now all filehandles should have been closed, so any
2423 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2425 #define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
2426 #define PERLIO_TEARDOWN_MESSAGE_FD 2
2427 char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
2429 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2430 if (PL_perlio_fd_refcnt[i]) {
2432 my_snprintf(buf, sizeof(buf),
2433 "PerlIO_teardown: fd %d refcnt=%d\n",
2434 i, PL_perlio_fd_refcnt[i]);
2435 PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
2441 /* Not bothering with PL_perlio_mutex since by now
2442 * all the interpreters are gone. */
2443 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2444 && PL_perlio_fd_refcnt) {
2445 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2446 PL_perlio_fd_refcnt = NULL;
2447 PL_perlio_fd_refcnt_size = 0;
2451 /*--------------------------------------------------------------------------------------*/
2453 * Bottom-most level for UNIX-like case
2457 struct _PerlIO base; /* The generic part */
2458 int fd; /* UNIX like file descriptor */
2459 int oflags; /* open/fcntl flags */
2463 S_lockcnt_dec(pTHX_ const void* f)
2465 PerlIO_lockcnt((PerlIO*)f)--;
2469 /* call the signal handler, and if that handler happens to clear
2470 * this handle, free what we can and return true */
2473 S_perlio_async_run(pTHX_ PerlIO* f) {
2475 SAVEDESTRUCTOR_X(S_lockcnt_dec, (void*)f);
2476 PerlIO_lockcnt(f)++;
2478 if ( !(PerlIOBase(f)->flags & PERLIO_F_CLEARED) ) {
2482 /* we've just run some perl-level code that could have done
2483 * anything, including closing the file or clearing this layer.
2484 * If so, free any lower layers that have already been
2485 * cleared, then return an error. */
2486 while (PerlIOValid(f) &&
2487 (PerlIOBase(f)->flags & PERLIO_F_CLEARED))
2489 const PerlIOl *l = *f;
2498 PerlIOUnix_oflags(const char *mode)
2501 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2506 if (*++mode == '+') {
2513 oflags = O_CREAT | O_TRUNC;
2514 if (*++mode == '+') {
2523 oflags = O_CREAT | O_APPEND;
2524 if (*++mode == '+') {
2537 else if (*mode == 't') {
2539 oflags &= ~O_BINARY;
2543 #ifdef PERLIO_USING_CRLF
2545 * If neither "t" nor "b" was specified, open the file
2551 if (*mode || oflags == -1) {
2552 SETERRNO(EINVAL, LIB_INVARG);
2559 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2561 PERL_UNUSED_CONTEXT;
2562 return PerlIOSelf(f, PerlIOUnix)->fd;
2566 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2568 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2571 if (PerlLIO_fstat(fd, &st) == 0) {
2572 if (!S_ISREG(st.st_mode)) {
2573 PerlIO_debug("%d is not regular file\n",fd);
2574 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2577 PerlIO_debug("%d _is_ a regular file\n",fd);
2583 PerlIOUnix_refcnt_inc(fd);
2584 PERL_UNUSED_CONTEXT;
2588 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2590 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2591 if (*PerlIONext(f)) {
2592 /* We never call down so do any pending stuff now */
2593 PerlIO_flush(PerlIONext(f));
2595 * XXX could (or should) we retrieve the oflags from the open file
2596 * handle rather than believing the "mode" we are passed in? XXX
2597 * Should the value on NULL mode be 0 or -1?
2599 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2600 mode ? PerlIOUnix_oflags(mode) : -1);
2602 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2608 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2610 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2612 PERL_UNUSED_CONTEXT;
2613 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2615 SETERRNO(ESPIPE, LIB_INVARG);
2617 SETERRNO(EINVAL, LIB_INVARG);
2621 new_loc = PerlLIO_lseek(fd, offset, whence);
2622 if (new_loc == (Off_t) - 1)
2624 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2629 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2630 IV n, const char *mode, int fd, int imode,
2631 int perm, PerlIO *f, int narg, SV **args)
2633 if (PerlIOValid(f)) {
2634 if (PerlIOBase(f)->tab && PerlIOBase(f)->flags & PERLIO_F_OPEN)
2635 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2638 if (*mode == IoTYPE_NUMERIC)
2641 imode = PerlIOUnix_oflags(mode);
2643 perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
2650 const char *path = SvPV_const(*args, len);
2651 if (!IS_SAFE_PATHNAME(path, len, "open"))
2653 fd = PerlLIO_open3(path, imode, perm);
2657 if (*mode == IoTYPE_IMPLICIT)
2660 f = PerlIO_allocate(aTHX);
2662 if (!PerlIOValid(f)) {
2663 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2667 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2668 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2669 if (*mode == IoTYPE_APPEND)
2670 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2677 * FIXME: pop layers ???
2685 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2687 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2689 if (flags & PERLIO_DUP_FD) {
2690 fd = PerlLIO_dup(fd);
2693 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2695 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2696 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2705 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2709 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2711 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2712 #ifdef PERLIO_STD_SPECIAL
2714 return PERLIO_STD_IN(fd, vbuf, count);
2716 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2717 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2721 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2722 if (len >= 0 || errno != EINTR) {
2724 if (errno != EAGAIN) {
2725 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2728 else if (len == 0 && count != 0) {
2729 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2735 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2742 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2746 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2748 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2749 #ifdef PERLIO_STD_SPECIAL
2750 if (fd == 1 || fd == 2)
2751 return PERLIO_STD_OUT(fd, vbuf, count);
2754 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2755 if (len >= 0 || errno != EINTR) {
2757 if (errno != EAGAIN) {
2758 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2764 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2771 PerlIOUnix_tell(pTHX_ PerlIO *f)
2773 PERL_UNUSED_CONTEXT;
2775 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2780 PerlIOUnix_close(pTHX_ PerlIO *f)
2783 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2785 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2786 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2787 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2792 SETERRNO(EBADF,SS_IVCHAN);
2795 while (PerlLIO_close(fd) != 0) {
2796 if (errno != EINTR) {
2801 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2805 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2810 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2811 sizeof(PerlIO_funcs),
2818 PerlIOBase_binmode, /* binmode */
2828 PerlIOBase_noop_ok, /* flush */
2829 PerlIOBase_noop_fail, /* fill */
2832 PerlIOBase_clearerr,
2833 PerlIOBase_setlinebuf,
2834 NULL, /* get_base */
2835 NULL, /* get_bufsiz */
2838 NULL, /* set_ptrcnt */
2841 /*--------------------------------------------------------------------------------------*/
2846 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2847 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2848 broken by the last second glibc 2.3 fix
2850 #define STDIO_BUFFER_WRITABLE
2855 struct _PerlIO base;
2856 FILE *stdio; /* The stream */
2860 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2862 PERL_UNUSED_CONTEXT;
2864 if (PerlIOValid(f)) {
2865 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2867 return PerlSIO_fileno(s);
2874 PerlIOStdio_mode(const char *mode, char *tmode)
2876 char * const ret = tmode;
2882 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2890 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2893 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2894 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2895 if (toptab == tab) {
2896 /* Top is already stdio - pop self (duplicate) and use original */
2897 PerlIO_pop(aTHX_ f);
2900 const int fd = PerlIO_fileno(n);
2903 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2904 mode = PerlIOStdio_mode(mode, tmode)))) {
2905 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2906 /* We never call down so do any pending stuff now */
2907 PerlIO_flush(PerlIONext(f));
2914 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2919 PerlIO_importFILE(FILE *stdio, const char *mode)
2925 if (!mode || !*mode) {
2926 /* We need to probe to see how we can open the stream
2927 so start with read/write and then try write and read
2928 we dup() so that we can fclose without loosing the fd.
2930 Note that the errno value set by a failing fdopen
2931 varies between stdio implementations.
2933 const int fd = PerlLIO_dup(fileno(stdio));
2934 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2936 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2939 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2942 /* Don't seem to be able to open */
2948 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2949 s = PerlIOSelf(f, PerlIOStdio);
2951 PerlIOUnix_refcnt_inc(fileno(stdio));
2958 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2959 IV n, const char *mode, int fd, int imode,
2960 int perm, PerlIO *f, int narg, SV **args)
2963 if (PerlIOValid(f)) {
2965 const char * const path = SvPV_const(*args, len);
2966 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2968 if (!IS_SAFE_PATHNAME(path, len, "open"))
2970 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2971 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2976 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2982 const char * const path = SvPV_const(*args, len);
2983 if (!IS_SAFE_PATHNAME(path, len, "open"))
2985 if (*mode == IoTYPE_NUMERIC) {
2987 fd = PerlLIO_open3(path, imode, perm);
2991 bool appended = FALSE;
2993 /* Cygwin wants its 'b' early. */
2995 mode = PerlIOStdio_mode(mode, tmode);
2997 stdio = PerlSIO_fopen(path, mode);
3000 f = PerlIO_allocate(aTHX);
3003 mode = PerlIOStdio_mode(mode, tmode);
3004 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
3006 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3007 PerlIOUnix_refcnt_inc(fileno(stdio));
3009 PerlSIO_fclose(stdio);
3021 if (*mode == IoTYPE_IMPLICIT) {
3028 stdio = PerlSIO_stdin;
3031 stdio = PerlSIO_stdout;
3034 stdio = PerlSIO_stderr;
3039 stdio = PerlSIO_fdopen(fd, mode =
3040 PerlIOStdio_mode(mode, tmode));
3044 f = PerlIO_allocate(aTHX);
3046 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
3047 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3048 PerlIOUnix_refcnt_inc(fileno(stdio));
3058 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3060 /* This assumes no layers underneath - which is what
3061 happens, but is not how I remember it. NI-S 2001/10/16
3063 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
3064 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
3065 const int fd = fileno(stdio);
3067 if (flags & PERLIO_DUP_FD) {
3068 const int dfd = PerlLIO_dup(fileno(stdio));
3070 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
3075 /* FIXME: To avoid messy error recovery if dup fails
3076 re-use the existing stdio as though flag was not set
3080 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3082 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3084 PerlIOUnix_refcnt_inc(fileno(stdio));
3091 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3093 PERL_UNUSED_CONTEXT;
3095 /* XXX this could use PerlIO_canset_fileno() and
3096 * PerlIO_set_fileno() support from Configure
3098 # if defined(__UCLIBC__)
3099 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3102 # elif defined(__GLIBC__)
3103 /* There may be a better way for GLIBC:
3104 - libio.h defines a flag to not close() on cleanup
3108 # elif defined(__sun)
3111 # elif defined(__hpux)
3115 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3116 your platform does not have special entry try this one.
3117 [For OSF only have confirmation for Tru64 (alpha)
3118 but assume other OSFs will be similar.]
3120 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3123 # elif defined(__FreeBSD__)
3124 /* There may be a better way on FreeBSD:
3125 - we could insert a dummy func in the _close function entry
3126 f->_close = (int (*)(void *)) dummy_close;
3130 # elif defined(__OpenBSD__)
3131 /* There may be a better way on OpenBSD:
3132 - we could insert a dummy func in the _close function entry
3133 f->_close = (int (*)(void *)) dummy_close;
3137 # elif defined(__EMX__)
3138 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3141 # elif defined(__CYGWIN__)
3142 /* There may be a better way on CYGWIN:
3143 - we could insert a dummy func in the _close function entry
3144 f->_close = (int (*)(void *)) dummy_close;
3148 # elif defined(WIN32)
3149 # if defined(UNDER_CE)
3150 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3159 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3160 (which isn't thread safe) instead
3162 # error "Don't know how to set FILE.fileno on your platform"
3170 PerlIOStdio_close(pTHX_ PerlIO *f)
3172 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3178 const int fd = fileno(stdio);
3186 #ifdef SOCKS5_VERSION_NAME
3187 /* Socks lib overrides close() but stdio isn't linked to
3188 that library (though we are) - so we must call close()
3189 on sockets on stdio's behalf.
3192 Sock_size_t optlen = sizeof(int);
3193 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3196 /* Test for -1, as *BSD stdio (at least) on fclose sets the FILE* such
3197 that a subsequent fileno() on it returns -1. Don't want to croak()
3198 from within PerlIOUnix_refcnt_dec() if some buggy caller code is
3199 trying to close an already closed handle which somehow it still has
3200 a reference to. (via.xs, I'm looking at you). */
3201 if (fd != -1 && PerlIOUnix_refcnt_dec(fd) > 0) {
3202 /* File descriptor still in use */
3206 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3207 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3209 if (stdio == stdout || stdio == stderr)
3210 return PerlIO_flush(f);
3211 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3212 Use Sarathy's trick from maint-5.6 to invalidate the
3213 fileno slot of the FILE *
3215 result = PerlIO_flush(f);
3217 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3220 MUTEX_LOCK(&PL_perlio_mutex);
3221 /* Right. We need a mutex here because for a brief while we
3222 will have the situation that fd is actually closed. Hence if
3223 a second thread were to get into this block, its dup() would
3224 likely return our fd as its dupfd. (after all, it is closed)
3225 Then if we get to the dup2() first, we blat the fd back
3226 (messing up its temporary as a side effect) only for it to
3227 then close its dupfd (== our fd) in its close(dupfd) */
3229 /* There is, of course, a race condition, that any other thread
3230 trying to input/output/whatever on this fd will be stuffed
3231 for the duration of this little manoeuvrer. Perhaps we
3232 should hold an IO mutex for the duration of every IO
3233 operation if we know that invalidate doesn't work on this
3234 platform, but that would suck, and could kill performance.
3236 Except that correctness trumps speed.
3237 Advice from klortho #11912. */
3239 dupfd = PerlLIO_dup(fd);
3242 MUTEX_UNLOCK(&PL_perlio_mutex);
3243 /* Oh cXap. This isn't going to go well. Not sure if we can
3244 recover from here, or if closing this particular FILE *
3245 is a good idea now. */
3250 SAVE_ERRNO; /* This is here only to silence compiler warnings */
3252 result = PerlSIO_fclose(stdio);
3253 /* We treat error from stdio as success if we invalidated
3254 errno may NOT be expected EBADF
3256 if (invalidate && result != 0) {
3260 #ifdef SOCKS5_VERSION_NAME
3261 /* in SOCKS' case, let close() determine return value */
3265 PerlLIO_dup2(dupfd,fd);
3266 PerlLIO_close(dupfd);
3268 MUTEX_UNLOCK(&PL_perlio_mutex);
3276 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3281 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3283 s = PerlIOSelf(f, PerlIOStdio)->stdio;
3286 STDCHAR *buf = (STDCHAR *) vbuf;
3288 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3289 * stdio does not do that for fread()
3291 const int ch = PerlSIO_fgetc(s);
3298 got = PerlSIO_fread(vbuf, 1, count, s);
3299 if (got == 0 && PerlSIO_ferror(s))
3301 if (got >= 0 || errno != EINTR)
3303 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3305 SETERRNO(0,0); /* just in case */
3311 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3314 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3316 #ifdef STDIO_BUFFER_WRITABLE
3317 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3318 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3319 STDCHAR *base = PerlIO_get_base(f);
3320 SSize_t cnt = PerlIO_get_cnt(f);
3321 STDCHAR *ptr = PerlIO_get_ptr(f);
3322 SSize_t avail = ptr - base;
3324 if (avail > count) {
3328 Move(buf-avail,ptr,avail,STDCHAR);
3331 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3332 if (PerlSIO_feof(s) && unread >= 0)
3333 PerlSIO_clearerr(s);
3338 if (PerlIO_has_cntptr(f)) {
3339 /* We can get pointer to buffer but not its base
3340 Do ungetc() but check chars are ending up in the
3343 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3344 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3346 const int ch = *--buf & 0xFF;
3347 if (ungetc(ch,s) != ch) {
3348 /* ungetc did not work */
3351 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3352 /* Did not change pointer as expected */
3353 fgetc(s); /* get char back again */
3363 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3369 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3373 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3376 got = PerlSIO_fwrite(vbuf, 1, count,
3377 PerlIOSelf(f, PerlIOStdio)->stdio);
3378 if (got >= 0 || errno != EINTR)
3380 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3382 SETERRNO(0,0); /* just in case */
3388 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3390 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3391 PERL_UNUSED_CONTEXT;
3393 return PerlSIO_fseek(stdio, offset, whence);
3397 PerlIOStdio_tell(pTHX_ PerlIO *f)
3399 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3400 PERL_UNUSED_CONTEXT;
3402 return PerlSIO_ftell(stdio);
3406 PerlIOStdio_flush(pTHX_ PerlIO *f)
3408 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3409 PERL_UNUSED_CONTEXT;
3411 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3412 return PerlSIO_fflush(stdio);
3418 * FIXME: This discards ungetc() and pre-read stuff which is not
3419 * right if this is just a "sync" from a layer above Suspect right
3420 * design is to do _this_ but not have layer above flush this
3421 * layer read-to-read
3424 * Not writeable - sync by attempting a seek
3427 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3435 PerlIOStdio_eof(pTHX_ PerlIO *f)
3437 PERL_UNUSED_CONTEXT;
3439 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3443 PerlIOStdio_error(pTHX_ PerlIO *f)
3445 PERL_UNUSED_CONTEXT;
3447 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3451 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3453 PERL_UNUSED_CONTEXT;
3455 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3459 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3461 PERL_UNUSED_CONTEXT;
3463 #ifdef HAS_SETLINEBUF
3464 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3466 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3472 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3474 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3475 return (STDCHAR*)PerlSIO_get_base(stdio);
3479 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3481 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3482 return PerlSIO_get_bufsiz(stdio);
3486 #ifdef USE_STDIO_PTR
3488 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3490 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3491 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3495 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3497 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3498 return PerlSIO_get_cnt(stdio);
3502 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3504 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3506 #ifdef STDIO_PTR_LVALUE
3507 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3508 #ifdef STDIO_PTR_LVAL_SETS_CNT
3509 assert(PerlSIO_get_cnt(stdio) == (cnt));
3511 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3513 * Setting ptr _does_ change cnt - we are done
3517 #else /* STDIO_PTR_LVALUE */
3519 #endif /* STDIO_PTR_LVALUE */
3522 * Now (or only) set cnt
3524 #ifdef STDIO_CNT_LVALUE
3525 PerlSIO_set_cnt(stdio, cnt);
3526 #else /* STDIO_CNT_LVALUE */
3527 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3528 PerlSIO_set_ptr(stdio,
3529 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3531 #else /* STDIO_PTR_LVAL_SETS_CNT */
3533 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3534 #endif /* STDIO_CNT_LVALUE */
3541 PerlIOStdio_fill(pTHX_ PerlIO *f)
3545 PERL_UNUSED_CONTEXT;
3546 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3548 stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3551 * fflush()ing read-only streams can cause trouble on some stdio-s
3553 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3554 if (PerlSIO_fflush(stdio) != 0)
3558 c = PerlSIO_fgetc(stdio);
3561 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3563 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3568 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3570 #ifdef STDIO_BUFFER_WRITABLE
3571 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3572 /* Fake ungetc() to the real buffer in case system's ungetc
3575 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3576 SSize_t cnt = PerlSIO_get_cnt(stdio);
3577 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3578 if (ptr == base+1) {
3579 *--ptr = (STDCHAR) c;
3580 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3581 if (PerlSIO_feof(stdio))
3582 PerlSIO_clearerr(stdio);
3588 if (PerlIO_has_cntptr(f)) {
3590 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3597 /* An ungetc()d char is handled separately from the regular
3598 * buffer, so we stuff it in the buffer ourselves.
3599 * Should never get called as should hit code above
3601 *(--((*stdio)->_ptr)) = (unsigned char) c;
3604 /* If buffer snoop scheme above fails fall back to
3607 if (PerlSIO_ungetc(c, stdio) != c)
3615 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3616 sizeof(PerlIO_funcs),
3618 sizeof(PerlIOStdio),
3619 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3623 PerlIOBase_binmode, /* binmode */
3637 PerlIOStdio_clearerr,
3638 PerlIOStdio_setlinebuf,
3640 PerlIOStdio_get_base,
3641 PerlIOStdio_get_bufsiz,
3646 #ifdef USE_STDIO_PTR
3647 PerlIOStdio_get_ptr,
3648 PerlIOStdio_get_cnt,
3649 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3650 PerlIOStdio_set_ptrcnt,
3653 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3658 #endif /* USE_STDIO_PTR */
3661 /* Note that calls to PerlIO_exportFILE() are reversed using
3662 * PerlIO_releaseFILE(), not importFILE. */
3664 PerlIO_exportFILE(PerlIO * f, const char *mode)
3668 if (PerlIOValid(f)) {
3671 if (!mode || !*mode) {
3672 mode = PerlIO_modestr(f, buf);
3674 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3678 /* De-link any lower layers so new :stdio sticks */
3680 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3681 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3683 PerlIOUnix_refcnt_inc(fileno(stdio));
3684 /* Link previous lower layers under new one */
3688 /* restore layers list */
3698 PerlIO_findFILE(PerlIO *f)
3703 if (l->tab == &PerlIO_stdio) {
3704 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3707 l = *PerlIONext(&l);
3709 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3710 /* However, we're not really exporting a FILE * to someone else (who
3711 becomes responsible for closing it, or calling PerlIO_releaseFILE())
3712 So we need to undo its reference count increase on the underlying file
3713 descriptor. We have to do this, because if the loop above returns you
3714 the FILE *, then *it* didn't increase any reference count. So there's
3715 only one way to be consistent. */
3716 stdio = PerlIO_exportFILE(f, NULL);
3718 const int fd = fileno(stdio);
3720 PerlIOUnix_refcnt_dec(fd);
3725 /* Use this to reverse PerlIO_exportFILE calls. */
3727 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3732 if (l->tab == &PerlIO_stdio) {
3733 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3734 if (s->stdio == f) { /* not in a loop */
3735 const int fd = fileno(f);
3737 PerlIOUnix_refcnt_dec(fd);
3740 PerlIO_pop(aTHX_ p);
3750 /*--------------------------------------------------------------------------------------*/
3752 * perlio buffer layer
3756 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3758 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3759 const int fd = PerlIO_fileno(f);
3760 if (fd >= 0 && PerlLIO_isatty(fd)) {
3761 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3763 if (*PerlIONext(f)) {
3764 const Off_t posn = PerlIO_tell(PerlIONext(f));
3765 if (posn != (Off_t) - 1) {
3769 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3773 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3774 IV n, const char *mode, int fd, int imode, int perm,
3775 PerlIO *f, int narg, SV **args)
3777 if (PerlIOValid(f)) {
3778 PerlIO *next = PerlIONext(f);
3780 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3781 if (tab && tab->Open)
3783 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3785 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3790 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3792 if (*mode == IoTYPE_IMPLICIT) {
3798 if (tab && tab->Open)
3799 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3802 SETERRNO(EINVAL, LIB_INVARG);
3804 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3806 * if push fails during open, open fails. close will pop us.
3811 fd = PerlIO_fileno(f);
3812 if (init && fd == 2) {
3814 * Initial stderr is unbuffered
3816 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3818 #ifdef PERLIO_USING_CRLF
3819 # ifdef PERLIO_IS_BINMODE_FD
3820 if (PERLIO_IS_BINMODE_FD(fd))
3821 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3825 * do something about failing setmode()? --jhi
3827 PerlLIO_setmode(fd, O_BINARY);
3830 /* Enable line buffering with record-oriented regular files
3831 * so we don't introduce an extraneous record boundary when
3832 * the buffer fills up.
3834 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3836 if (PerlLIO_fstat(fd, &st) == 0
3837 && S_ISREG(st.st_mode)
3838 && (st.st_fab_rfm == FAB$C_VAR
3839 || st.st_fab_rfm == FAB$C_VFC)) {
3840 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
3851 * This "flush" is akin to sfio's sync in that it handles files in either
3852 * read or write state. For write state, we put the postponed data through
3853 * the next layers. For read state, we seek() the next layers to the
3854 * offset given by current position in the buffer, and discard the buffer
3855 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3856 * in any case?). Then the pass the stick further in chain.
3859 PerlIOBuf_flush(pTHX_ PerlIO *f)
3861 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3863 PerlIO *n = PerlIONext(f);
3864 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3866 * write() the buffer
3868 const STDCHAR *buf = b->buf;
3869 const STDCHAR *p = buf;
3870 while (p < b->ptr) {
3871 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3875 else if (count < 0 || PerlIO_error(n)) {
3876 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3881 b->posn += (p - buf);
3883 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3884 STDCHAR *buf = PerlIO_get_base(f);
3886 * Note position change
3888 b->posn += (b->ptr - buf);
3889 if (b->ptr < b->end) {
3890 /* We did not consume all of it - try and seek downstream to
3891 our logical position
3893 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3894 /* Reload n as some layers may pop themselves on seek */
3895 b->posn = PerlIO_tell(n = PerlIONext(f));
3898 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3899 data is lost for good - so return saying "ok" having undone
3902 b->posn -= (b->ptr - buf);
3907 b->ptr = b->end = b->buf;
3908 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3909 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3910 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3915 /* This discards the content of the buffer after b->ptr, and rereads
3916 * the buffer from the position off in the layer downstream; here off
3917 * is at offset corresponding to b->ptr - b->buf.
3920 PerlIOBuf_fill(pTHX_ PerlIO *f)
3922 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3923 PerlIO *n = PerlIONext(f);
3926 * Down-stream flush is defined not to loose read data so is harmless.
3927 * we would not normally be fill'ing if there was data left in anycase.
3929 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3931 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3932 PerlIOBase_flush_linebuf(aTHX);
3935 PerlIO_get_base(f); /* allocate via vtable */
3937 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3939 b->ptr = b->end = b->buf;
3941 if (!PerlIOValid(n)) {
3942 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3946 if (PerlIO_fast_gets(n)) {
3948 * Layer below is also buffered. We do _NOT_ want to call its
3949 * ->Read() because that will loop till it gets what we asked for
3950 * which may hang on a pipe etc. Instead take anything it has to
3951 * hand, or ask it to fill _once_.
3953 avail = PerlIO_get_cnt(n);
3955 avail = PerlIO_fill(n);
3957 avail = PerlIO_get_cnt(n);
3959 if (!PerlIO_error(n) && PerlIO_eof(n))
3964 STDCHAR *ptr = PerlIO_get_ptr(n);
3965 const SSize_t cnt = avail;
3966 if (avail > (SSize_t)b->bufsiz)
3968 Copy(ptr, b->buf, avail, STDCHAR);
3969 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3973 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3977 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3979 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3982 b->end = b->buf + avail;
3983 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3988 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3990 if (PerlIOValid(f)) {
3991 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3994 return PerlIOBase_read(aTHX_ f, vbuf, count);
4000 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4002 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4003 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4006 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4011 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4013 * Buffer is already a read buffer, we can overwrite any chars
4014 * which have been read back to buffer start
4016 avail = (b->ptr - b->buf);
4020 * Buffer is idle, set it up so whole buffer is available for
4024 b->end = b->buf + avail;
4026 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4028 * Buffer extends _back_ from where we are now
4030 b->posn -= b->bufsiz;
4032 if ((SSize_t) count >= 0 && avail > (SSize_t) count) {
4034 * If we have space for more than count, just move count
4042 * In simple stdio-like ungetc() case chars will be already
4045 if (buf != b->ptr) {
4046 Copy(buf, b->ptr, avail, STDCHAR);
4050 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4054 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
4060 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4062 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4063 const STDCHAR *buf = (const STDCHAR *) vbuf;
4064 const STDCHAR *flushptr = buf;
4068 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4070 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4071 if (PerlIO_flush(f) != 0) {
4075 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4076 flushptr = buf + count;
4077 while (flushptr > buf && *(flushptr - 1) != '\n')
4081 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
4082 if ((SSize_t) count >= 0 && (SSize_t) count < avail)
4084 if (flushptr > buf && flushptr <= buf + avail)
4085 avail = flushptr - buf;
4086 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4088 Copy(buf, b->ptr, avail, STDCHAR);
4093 if (buf == flushptr)
4096 if (b->ptr >= (b->buf + b->bufsiz))
4097 if (PerlIO_flush(f) == -1)
4100 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4106 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4109 if ((code = PerlIO_flush(f)) == 0) {
4110 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4111 code = PerlIO_seek(PerlIONext(f), offset, whence);
4113 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4114 b->posn = PerlIO_tell(PerlIONext(f));
4121 PerlIOBuf_tell(pTHX_ PerlIO *f)
4123 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4125 * b->posn is file position where b->buf was read, or will be written
4127 Off_t posn = b->posn;
4128 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
4129 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4131 /* As O_APPEND files are normally shared in some sense it is better
4136 /* when file is NOT shared then this is sufficient */
4137 PerlIO_seek(PerlIONext(f),0, SEEK_END);
4139 posn = b->posn = PerlIO_tell(PerlIONext(f));
4143 * If buffer is valid adjust position by amount in buffer
4145 posn += (b->ptr - b->buf);
4151 PerlIOBuf_popped(pTHX_ PerlIO *f)
4153 const IV code = PerlIOBase_popped(aTHX_ f);
4154 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4155 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4158 b->ptr = b->end = b->buf = NULL;
4159 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4164 PerlIOBuf_close(pTHX_ PerlIO *f)
4166 const IV code = PerlIOBase_close(aTHX_ f);
4167 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4168 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4171 b->ptr = b->end = b->buf = NULL;
4172 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4177 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
4179 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4186 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4188 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4191 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4192 return (b->end - b->ptr);
4197 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4199 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4200 PERL_UNUSED_CONTEXT;
4204 b->bufsiz = PERLIOBUF_DEFAULT_BUFSIZ;
4205 Newxz(b->buf,b->bufsiz, STDCHAR);
4207 b->buf = (STDCHAR *) & b->oneword;
4208 b->bufsiz = sizeof(b->oneword);
4210 b->end = b->ptr = b->buf;
4216 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4218 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4221 return (b->end - b->buf);
4225 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4227 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4229 PERL_UNUSED_ARG(cnt);
4234 assert(PerlIO_get_cnt(f) == cnt);
4235 assert(b->ptr >= b->buf);
4236 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4240 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4242 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4247 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4248 sizeof(PerlIO_funcs),
4251 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4255 PerlIOBase_binmode, /* binmode */
4269 PerlIOBase_clearerr,
4270 PerlIOBase_setlinebuf,
4275 PerlIOBuf_set_ptrcnt,
4278 /*--------------------------------------------------------------------------------------*/
4280 * Temp layer to hold unread chars when cannot do it any other way
4284 PerlIOPending_fill(pTHX_ PerlIO *f)
4287 * Should never happen
4294 PerlIOPending_close(pTHX_ PerlIO *f)
4297 * A tad tricky - flush pops us, then we close new top
4300 return PerlIO_close(f);
4304 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4307 * A tad tricky - flush pops us, then we seek new top
4310 return PerlIO_seek(f, offset, whence);
4315 PerlIOPending_flush(pTHX_ PerlIO *f)
4317 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4318 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4322 PerlIO_pop(aTHX_ f);
4327 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4333 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4338 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4340 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4341 PerlIOl * const l = PerlIOBase(f);
4343 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4344 * etc. get muddled when it changes mid-string when we auto-pop.
4346 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4347 (PerlIOBase(PerlIONext(f))->
4348 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4353 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4355 SSize_t avail = PerlIO_get_cnt(f);
4357 if ((SSize_t) count >= 0 && (SSize_t)count < avail)
4360 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4361 if (got >= 0 && got < (SSize_t)count) {
4362 const SSize_t more =
4363 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4364 if (more >= 0 || got == 0)
4370 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4371 sizeof(PerlIO_funcs),
4374 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4375 PerlIOPending_pushed,
4378 PerlIOBase_binmode, /* binmode */
4387 PerlIOPending_close,
4388 PerlIOPending_flush,
4392 PerlIOBase_clearerr,
4393 PerlIOBase_setlinebuf,
4398 PerlIOPending_set_ptrcnt,
4403 /*--------------------------------------------------------------------------------------*/
4405 * crlf - translation On read translate CR,LF to "\n" we do this by
4406 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4407 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4409 * c->nl points on the first byte of CR LF pair when it is temporarily
4410 * replaced by LF, or to the last CR of the buffer. In the former case
4411 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4412 * that it ends at c->nl; these two cases can be distinguished by
4413 * *c->nl. c->nl is set during _getcnt() call, and unset during
4414 * _unread() and _flush() calls.
4415 * It only matters for read operations.
4419 PerlIOBuf base; /* PerlIOBuf stuff */
4420 STDCHAR *nl; /* Position of crlf we "lied" about in the
4424 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4425 * Otherwise the :crlf layer would always revert back to
4429 S_inherit_utf8_flag(PerlIO *f)
4431 PerlIO *g = PerlIONext(f);
4432 if (PerlIOValid(g)) {
4433 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4434 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4440 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4443 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4444 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4446 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4447 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4448 PerlIOBase(f)->flags);
4451 /* If the old top layer is a CRLF layer, reactivate it (if
4452 * necessary) and remove this new layer from the stack */
4453 PerlIO *g = PerlIONext(f);
4454 if (PerlIOValid(g)) {
4455 PerlIOl *b = PerlIOBase(g);
4456 if (b && b->tab == &PerlIO_crlf) {
4457 if (!(b->flags & PERLIO_F_CRLF))
4458 b->flags |= PERLIO_F_CRLF;
4459 S_inherit_utf8_flag(g);
4460 PerlIO_pop(aTHX_ f);
4465 S_inherit_utf8_flag(f);
4471 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4473 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4474 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4475 *(c->nl) = NATIVE_0xd;
4478 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4479 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4481 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4482 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4484 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4489 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4490 b->end = b->ptr = b->buf + b->bufsiz;
4491 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4492 b->posn -= b->bufsiz;
4494 while (count > 0 && b->ptr > b->buf) {
4495 const int ch = *--buf;
4497 if (b->ptr - 2 >= b->buf) {
4498 *--(b->ptr) = NATIVE_0xa;
4499 *--(b->ptr) = NATIVE_0xd;
4504 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4505 *--(b->ptr) = NATIVE_0xa; /* Works even if 0xa ==
4519 unread += PerlIOBase_unread(aTHX_ f, (const STDCHAR *) vbuf + unread, count);
4524 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4526 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4528 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4531 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4532 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4533 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == NATIVE_0xd)) {
4534 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4536 while (nl < b->end && *nl != NATIVE_0xd)
4538 if (nl < b->end && *nl == NATIVE_0xd) {
4540 if (nl + 1 < b->end) {
4541 if (nl[1] == NATIVE_0xa) {
4547 * Not CR,LF but just CR
4555 * Blast - found CR as last char in buffer
4560 * They may not care, defer work as long as
4564 return (nl - b->ptr);
4568 b->ptr++; /* say we have read it as far as
4569 * flush() is concerned */
4570 b->buf++; /* Leave space in front of buffer */
4571 /* Note as we have moved buf up flush's
4573 will naturally make posn point at CR
4575 b->bufsiz--; /* Buffer is thus smaller */
4576 code = PerlIO_fill(f); /* Fetch some more */
4577 b->bufsiz++; /* Restore size for next time */
4578 b->buf--; /* Point at space */
4579 b->ptr = nl = b->buf; /* Which is what we hand
4581 *nl = NATIVE_0xd; /* Fill in the CR */
4583 goto test; /* fill() call worked */
4585 * CR at EOF - just fall through
4587 /* Should we clear EOF though ??? */
4592 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4598 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4600 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4601 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4607 if (ptr == b->end && *c->nl == NATIVE_0xd) {
4608 /* Deferred CR at end of buffer case - we lied about count */
4621 * Test code - delete when it works ...
4623 IV flags = PerlIOBase(f)->flags;
4624 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4625 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == NATIVE_0xd) {
4626 /* Deferred CR at end of buffer case - we lied about count */
4632 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4633 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4634 flags, c->nl, b->end, cnt);
4641 * They have taken what we lied about
4643 *(c->nl) = NATIVE_0xd;
4649 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4653 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4655 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4656 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4658 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4659 const STDCHAR *buf = (const STDCHAR *) vbuf;
4660 const STDCHAR * const ebuf = buf + count;
4663 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4665 while (buf < ebuf) {
4666 const STDCHAR * const eptr = b->buf + b->bufsiz;
4667 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4668 while (buf < ebuf && b->ptr < eptr) {
4670 if ((b->ptr + 2) > eptr) {
4678 *(b->ptr)++ = NATIVE_0xd; /* CR */
4679 *(b->ptr)++ = NATIVE_0xa; /* LF */
4681 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4688 *(b->ptr)++ = *buf++;
4690 if (b->ptr >= eptr) {
4696 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4698 return (buf - (STDCHAR *) vbuf);
4703 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4705 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4707 *(c->nl) = NATIVE_0xd;
4710 return PerlIOBuf_flush(aTHX_ f);
4714 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4716 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4717 /* In text mode - flush any pending stuff and flip it */
4718 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4719 #ifndef PERLIO_USING_CRLF
4720 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4721 PerlIO_pop(aTHX_ f);
4727 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4728 sizeof(PerlIO_funcs),
4731 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4733 PerlIOBuf_popped, /* popped */
4735 PerlIOCrlf_binmode, /* binmode */
4739 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4740 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4741 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4749 PerlIOBase_clearerr,
4750 PerlIOBase_setlinebuf,
4755 PerlIOCrlf_set_ptrcnt,
4759 Perl_PerlIO_stdin(pTHX)
4763 PerlIO_stdstreams(aTHX);
4765 return (PerlIO*)&PL_perlio[1];
4769 Perl_PerlIO_stdout(pTHX)
4773 PerlIO_stdstreams(aTHX);
4775 return (PerlIO*)&PL_perlio[2];
4779 Perl_PerlIO_stderr(pTHX)
4783 PerlIO_stdstreams(aTHX);
4785 return (PerlIO*)&PL_perlio[3];
4788 /*--------------------------------------------------------------------------------------*/
4791 PerlIO_getname(PerlIO *f, char *buf)
4796 bool exported = FALSE;
4797 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4799 stdio = PerlIO_exportFILE(f,0);
4803 name = fgetname(stdio, buf);
4804 if (exported) PerlIO_releaseFILE(f,stdio);
4809 PERL_UNUSED_ARG(buf);
4810 Perl_croak_nocontext("Don't know how to get file name");
4816 /*--------------------------------------------------------------------------------------*/
4818 * Functions which can be called on any kind of PerlIO implemented in
4822 #undef PerlIO_fdopen
4824 PerlIO_fdopen(int fd, const char *mode)
4827 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4832 PerlIO_open(const char *path, const char *mode)
4835 SV *name = sv_2mortal(newSVpv(path, 0));
4836 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4839 #undef Perlio_reopen
4841 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4844 SV *name = sv_2mortal(newSVpv(path,0));
4845 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4850 PerlIO_getc(PerlIO *f)
4854 if ( 1 == PerlIO_read(f, buf, 1) ) {
4855 return (unsigned char) buf[0];
4860 #undef PerlIO_ungetc
4862 PerlIO_ungetc(PerlIO *f, int ch)
4867 if (PerlIO_unread(f, &buf, 1) == 1)
4875 PerlIO_putc(PerlIO *f, int ch)
4879 return PerlIO_write(f, &buf, 1);
4884 PerlIO_puts(PerlIO *f, const char *s)
4887 return PerlIO_write(f, s, strlen(s));
4890 #undef PerlIO_rewind
4892 PerlIO_rewind(PerlIO *f)
4895 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4899 #undef PerlIO_vprintf
4901 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4910 Perl_va_copy(ap, apc);
4911 sv = vnewSVpvf(fmt, &apc);
4913 sv = vnewSVpvf(fmt, &ap);
4915 s = SvPV_const(sv, len);
4916 wrote = PerlIO_write(f, s, len);
4921 #undef PerlIO_printf
4923 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4928 result = PerlIO_vprintf(f, fmt, ap);
4933 #undef PerlIO_stdoutf
4935 PerlIO_stdoutf(const char *fmt, ...)
4941 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4946 #undef PerlIO_tmpfile
4948 PerlIO_tmpfile(void)
4955 const int fd = win32_tmpfd();
4957 f = PerlIO_fdopen(fd, "w+b");
4959 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4961 char tempname[] = "/tmp/PerlIO_XXXXXX";
4962 const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
4965 * I have no idea how portable mkstemp() is ... NI-S
4967 if (tmpdir && *tmpdir) {
4968 /* if TMPDIR is set and not empty, we try that first */
4969 sv = newSVpv(tmpdir, 0);
4970 sv_catpv(sv, tempname + 4);
4971 fd = mkstemp(SvPVX(sv));
4976 /* else we try /tmp */
4977 fd = mkstemp(tempname);
4982 sv_catpv(sv, tempname + 4);
4983 fd = mkstemp(SvPVX(sv));
4986 f = PerlIO_fdopen(fd, "w+");
4988 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4989 PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
4992 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
4993 FILE * const stdio = PerlSIO_tmpfile();
4996 f = PerlIO_fdopen(fileno(stdio), "w+");
4998 # endif /* else HAS_MKSTEMP */
4999 #endif /* else WIN32 */
5006 #endif /* PERLIO_IS_STDIO */
5008 /*======================================================================================*/
5010 * Now some functions in terms of above which may be needed even if we are
5011 * not in true PerlIO mode
5014 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5017 const char *direction = NULL;
5020 * Need to supply default layer info from open.pm
5026 if (mode && mode[0] != 'r') {
5027 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
5028 direction = "open>";
5030 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
5031 direction = "open<";
5036 layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
5039 return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;
5044 #undef PerlIO_setpos
5046 PerlIO_setpos(PerlIO *f, SV *pos)
5051 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5052 if (f && len == sizeof(Off_t))
5053 return PerlIO_seek(f, *posn, SEEK_SET);
5055 SETERRNO(EINVAL, SS_IVCHAN);
5059 #undef PerlIO_setpos
5061 PerlIO_setpos(PerlIO *f, SV *pos)
5066 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5067 if (f && len == sizeof(Fpos_t)) {
5068 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5069 return fsetpos64(f, fpos);
5071 return fsetpos(f, fpos);
5075 SETERRNO(EINVAL, SS_IVCHAN);
5081 #undef PerlIO_getpos
5083 PerlIO_getpos(PerlIO *f, SV *pos)
5086 Off_t posn = PerlIO_tell(f);
5087 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5088 return (posn == (Off_t) - 1) ? -1 : 0;
5091 #undef PerlIO_getpos
5093 PerlIO_getpos(PerlIO *f, SV *pos)
5098 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5099 code = fgetpos64(f, &fpos);
5101 code = fgetpos(f, &fpos);
5103 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5108 #if !defined(HAS_VPRINTF)
5111 vprintf(char *pat, char *args)
5113 _doprnt(pat, args, stdout);
5114 return 0; /* wrong, but perl doesn't use the return
5119 vfprintf(FILE *fd, char *pat, char *args)
5121 _doprnt(pat, args, fd);
5122 return 0; /* wrong, but perl doesn't use the return
5130 * c-indentation-style: bsd
5132 * indent-tabs-mode: nil
5135 * ex: set ts=8 sts=4 sw=4 et: