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)
203 /* Unless O_BINARY is different from zero, bit-and:ing
204 * with it won't do much good. */
205 if (rawmode & O_BINARY)
212 #ifndef PERLIO_LAYERS
214 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
216 if (!names || !*names
217 || strEQ(names, ":crlf")
218 || strEQ(names, ":raw")
219 || strEQ(names, ":bytes")
223 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
231 PerlIO_destruct(pTHX)
236 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
238 return perlsio_binmode(fp, iotype, mode);
242 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
244 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
247 #ifdef PERL_IMPLICIT_SYS
248 return PerlSIO_fdupopen(f);
251 return win32_fdupopen(f);
254 const int fd = PerlLIO_dup(PerlIO_fileno(f));
258 const int omode = djgpp_get_stream_mode(f);
260 const int omode = fcntl(fd, F_GETFL);
262 PerlIO_intmode2str(omode,mode,NULL);
263 /* the r+ is a hack */
264 return PerlIO_fdopen(fd, mode);
269 SETERRNO(EBADF, SS_IVCHAN);
279 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
283 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
284 int imode, int perm, PerlIO *old, int narg, SV **args)
288 Perl_croak(aTHX_ "More than one argument to open");
290 if (*args == &PL_sv_undef)
291 return PerlIO_tmpfile();
294 const char *name = SvPV_const(*args, len);
295 if (!IS_SAFE_PATHNAME(name, len, "open"))
298 if (*mode == IoTYPE_NUMERIC) {
299 fd = PerlLIO_open3(name, imode, perm);
301 return PerlIO_fdopen(fd, mode + 1);
304 return PerlIO_reopen(name, mode, old);
307 return PerlIO_open(name, mode);
312 return PerlIO_fdopen(fd, (char *) mode);
317 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
318 XS(XS_PerlIO__Layer__find)
322 Perl_croak(aTHX_ "Usage class->find(name[,load])");
324 const char * const name = SvPV_nolen_const(ST(1));
325 ST(0) = (strEQ(name, "crlf")
326 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
333 Perl_boot_core_PerlIO(pTHX)
335 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
341 /*======================================================================================*/
343 * Implement all the PerlIO interface ourselves.
349 PerlIO_debug(const char *fmt, ...)
359 if (!PL_perlio_debug_fd) {
361 PerlProc_getuid() == PerlProc_geteuid() &&
362 PerlProc_getgid() == PerlProc_getegid()) {
363 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
366 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
368 PL_perlio_debug_fd = PerlLIO_dup(2); /* stderr */
370 /* tainting or set*id, so ignore the environment and send the
371 debug output to stderr, like other -D switches. */
372 PL_perlio_debug_fd = PerlLIO_dup(2); /* stderr */
375 if (PL_perlio_debug_fd > 0) {
377 const char * const s = CopFILE(PL_curcop);
378 /* Use fixed buffer as sv_catpvf etc. needs SVs */
380 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
381 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
382 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2));
384 const char *s = CopFILE(PL_curcop);
386 SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
387 (IV) CopLINE(PL_curcop));
388 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
390 s = SvPV_const(sv, len);
391 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, s, len));
398 /*--------------------------------------------------------------------------------------*/
401 * Inner level routines
404 /* check that the head field of each layer points back to the head */
407 # define VERIFY_HEAD(f) PerlIO_verify_head(aTHX_ f)
409 PerlIO_verify_head(pTHX_ PerlIO *f)
413 #ifndef PERL_IMPLICIT_SYS
418 p = head = PerlIOBase(f)->head;
421 assert(p->head == head);
422 if (p == (PerlIOl*)f)
429 # define VERIFY_HEAD(f)
434 * Table of pointers to the PerlIO structs (malloc'ed)
436 #define PERLIO_TABLE_SIZE 64
439 PerlIO_init_table(pTHX)
443 Newxz(PL_perlio, PERLIO_TABLE_SIZE, PerlIOl);
449 PerlIO_allocate(pTHX)
452 * Find a free slot in the table, allocating new table as necessary
457 while ((f = *last)) {
459 last = (PerlIOl **) (f);
460 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
461 if (!((++f)->next)) {
466 Newxz(f,PERLIO_TABLE_SIZE,PerlIOl);
470 *last = (PerlIOl*) f++;
473 f->flags = 0; /* lockcnt */
479 #undef PerlIO_fdupopen
481 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
483 if (PerlIOValid(f)) {
484 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
485 DEBUG_i( PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param) );
487 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
489 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
493 SETERRNO(EBADF, SS_IVCHAN);
499 PerlIO_cleantable(pTHX_ PerlIOl **tablep)
501 PerlIOl * const table = *tablep;
504 PerlIO_cleantable(aTHX_(PerlIOl **) & (table[0]));
505 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
506 PerlIOl * const f = table + i;
508 PerlIO_close(&(f->next));
518 PerlIO_list_alloc(pTHX)
522 Newxz(list, 1, PerlIO_list_t);
528 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
531 if (--list->refcnt == 0) {
534 for (i = 0; i < list->cur; i++)
535 SvREFCNT_dec(list->array[i].arg);
536 Safefree(list->array);
544 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
549 if (list->cur >= list->len) {
550 const IV new_len = list->len + 8;
552 Renew(list->array, new_len, PerlIO_pair_t);
554 Newx(list->array, new_len, PerlIO_pair_t);
557 p = &(list->array[list->cur++]);
559 if ((p->arg = arg)) {
560 SvREFCNT_inc_simple_void_NN(arg);
565 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
567 PerlIO_list_t *list = NULL;
570 list = PerlIO_list_alloc(aTHX);
571 for (i=0; i < proto->cur; i++) {
572 SV *arg = proto->array[i].arg;
575 arg = sv_dup(arg, param);
577 PERL_UNUSED_ARG(param);
579 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
586 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
589 PerlIOl **table = &proto->Iperlio;
592 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
593 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
594 PerlIO_init_table(aTHX);
595 DEBUG_i( PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto) );
596 while ((f = *table)) {
598 table = (PerlIOl **) (f++);
599 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
601 (void) fp_dup(&(f->next), 0, param);
608 PERL_UNUSED_ARG(proto);
609 PERL_UNUSED_ARG(param);
614 PerlIO_destruct(pTHX)
616 PerlIOl **table = &PL_perlio;
619 DEBUG_i( PerlIO_debug("Destruct %p\n",(void*)aTHX) );
621 while ((f = *table)) {
623 table = (PerlIOl **) (f++);
624 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
625 PerlIO *x = &(f->next);
628 if (l->tab && l->tab->kind & PERLIO_K_DESTRUCT) {
629 DEBUG_i( PerlIO_debug("Destruct popping %s\n", l->tab->name) );
643 PerlIO_pop(pTHX_ PerlIO *f)
645 const PerlIOl *l = *f;
648 DEBUG_i( PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f,
649 l->tab ? l->tab->name : "(Null)") );
650 if (l->tab && l->tab->Popped) {
652 * If popped returns non-zero do not free its layer structure
653 * it has either done so itself, or it is shared and still in
656 if ((*l->tab->Popped) (aTHX_ f) != 0)
659 if (PerlIO_lockcnt(f)) {
660 /* we're in use; defer freeing the structure */
661 PerlIOBase(f)->flags = PERLIO_F_CLEARED;
662 PerlIOBase(f)->tab = NULL;
672 /* Return as an array the stack of layers on a filehandle. Note that
673 * the stack is returned top-first in the array, and there are three
674 * times as many array elements as there are layers in the stack: the
675 * first element of a layer triplet is the name, the second one is the
676 * arguments, and the third one is the flags. */
679 PerlIO_get_layers(pTHX_ PerlIO *f)
681 AV * const av = newAV();
683 if (PerlIOValid(f)) {
684 PerlIOl *l = PerlIOBase(f);
687 /* There is some collusion in the implementation of
688 XS_PerlIO_get_layers - it knows that name and flags are
689 generated as fresh SVs here, and takes advantage of that to
690 "copy" them by taking a reference. If it changes here, it needs
691 to change there too. */
692 SV * const name = l->tab && l->tab->name ?
693 newSVpv(l->tab->name, 0) : &PL_sv_undef;
694 SV * const arg = l->tab && l->tab->Getarg ?
695 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
698 av_push(av, newSViv((IV)l->flags));
706 /*--------------------------------------------------------------------------------------*/
708 * XS Interface for perl code
712 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
716 if ((SSize_t) len <= 0)
718 for (i = 0; i < PL_known_layers->cur; i++) {
719 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
720 const STRLEN this_len = strlen(f->name);
721 if (this_len == len && memEQ(f->name, name, len)) {
722 DEBUG_i( PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f) );
726 if (load && PL_subname && PL_def_layerlist
727 && PL_def_layerlist->cur >= 2) {
728 if (PL_in_load_module) {
729 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
732 SV * const pkgsv = newSVpvs("PerlIO");
733 SV * const layer = newSVpvn(name, len);
734 CV * const cv = get_cvs("PerlIO::Layer::NoWarnings", 0);
736 SAVEBOOL(PL_in_load_module);
738 SAVEGENERICSV(PL_warnhook);
739 PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
741 PL_in_load_module = TRUE;
743 * The two SVs are magically freed by load_module
745 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
747 return PerlIO_find_layer(aTHX_ name, len, 0);
750 DEBUG_i( PerlIO_debug("Cannot find %.*s\n", (int) len, name) );
754 #ifdef USE_ATTRIBUTES_FOR_PERLIO
757 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
760 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
761 PerlIO * const ifp = IoIFP(io);
762 PerlIO * const ofp = IoOFP(io);
763 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
764 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
770 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
773 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
774 PerlIO * const ifp = IoIFP(io);
775 PerlIO * const ofp = IoOFP(io);
776 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
777 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
783 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
785 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
790 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
792 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
796 MGVTBL perlio_vtab = {
804 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
805 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
808 SV * const sv = SvRV(ST(1));
809 AV * const av = newAV();
813 sv_magic(sv, MUTABLE_SV(av), PERL_MAGIC_ext, NULL, 0);
815 mg = mg_find(sv, PERL_MAGIC_ext);
816 mg->mg_virtual = &perlio_vtab;
818 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
819 for (i = 2; i < items; i++) {
821 const char * const name = SvPV_const(ST(i), len);
822 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
824 av_push(av, SvREFCNT_inc_simple_NN(layer));
835 #endif /* USE_ATTRIBUTES_FOR_PERLIO */
838 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
840 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
841 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
845 XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
846 XS(XS_PerlIO__Layer__NoWarnings)
848 /* This is used as a %SIG{__WARN__} handler to suppress warnings
849 during loading of layers.
852 PERL_UNUSED_VAR(items);
855 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0))) );
859 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
860 XS(XS_PerlIO__Layer__find)
864 Perl_croak(aTHX_ "Usage class->find(name[,load])");
867 const char * const name = SvPV_const(ST(1), len);
868 const bool load = (items > 2) ? SvTRUE_NN(ST(2)) : 0;
869 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
871 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
878 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
880 if (!PL_known_layers)
881 PL_known_layers = PerlIO_list_alloc(aTHX);
882 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
883 DEBUG_i( PerlIO_debug("define %s %p\n", tab->name, (void*)tab) );
887 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
890 const char *s = names;
892 while (isSPACE(*s) || *s == ':')
897 const char *as = NULL;
899 if (!isIDFIRST(*s)) {
901 * Message is consistent with how attribute lists are
902 * passed. Even though this means "foo : : bar" is
903 * seen as an invalid separator character.
905 const char q = ((*s == '\'') ? '"' : '\'');
906 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
907 "Invalid separator character %c%c%c in PerlIO layer specification %s",
909 SETERRNO(EINVAL, LIB_INVARG);
914 } while (isWORDCHAR(*e));
930 * It's a nul terminated string, not allowed
931 * to \ the terminating null. Anything other
932 * character is passed over.
942 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
943 "Argument list not closed for PerlIO layer \"%.*s\"",
955 PerlIO_funcs * const layer =
956 PerlIO_find_layer(aTHX_ s, llen, 1);
960 arg = newSVpvn(as, alen);
961 PerlIO_list_push(aTHX_ av, layer,
962 (arg) ? arg : &PL_sv_undef);
966 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
979 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
981 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
982 #ifdef PERLIO_USING_CRLF
985 if (PerlIO_stdio.Set_ptrcnt)
988 DEBUG_i( PerlIO_debug("Pushing %s\n", tab->name) );
989 PerlIO_list_push(aTHX_ av, (PerlIO_funcs *)tab, &PL_sv_undef);
993 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
995 return av->array[n].arg;
999 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1001 if (n >= 0 && n < av->cur) {
1002 DEBUG_i( PerlIO_debug("Layer %" IVdf " is %s\n", n,
1003 av->array[n].funcs->name) );
1004 return av->array[n].funcs;
1007 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1012 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1014 PERL_UNUSED_ARG(mode);
1015 PERL_UNUSED_ARG(arg);
1016 PERL_UNUSED_ARG(tab);
1017 if (PerlIOValid(f)) {
1019 PerlIO_pop(aTHX_ f);
1025 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1026 sizeof(PerlIO_funcs),
1029 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1049 NULL, /* get_base */
1050 NULL, /* get_bufsiz */
1053 NULL, /* set_ptrcnt */
1057 PerlIO_default_layers(pTHX)
1059 if (!PL_def_layerlist) {
1060 const char * const s = TAINTING_get ? NULL : PerlEnv_getenv("PERLIO");
1061 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1062 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1063 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1065 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1067 osLayer = &PerlIO_win32;
1070 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1071 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1072 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1073 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1074 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1075 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1076 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1077 PerlIO_list_push(aTHX_ PL_def_layerlist, (PerlIO_funcs *)osLayer,
1080 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1083 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1086 if (PL_def_layerlist->cur < 2) {
1087 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1089 return PL_def_layerlist;
1093 Perl_boot_core_PerlIO(pTHX)
1095 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1096 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1099 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1100 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1104 PerlIO_default_layer(pTHX_ I32 n)
1106 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1109 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1112 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1113 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1116 PerlIO_stdstreams(pTHX)
1119 PerlIO_init_table(aTHX);
1120 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1121 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1122 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1127 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1130 if (tab->fsize != sizeof(PerlIO_funcs)) {
1132 "%s (%" UVuf ") does not match %s (%" UVuf ")",
1133 "PerlIO layer function table size", (UV)tab->fsize,
1134 "size expected by this perl", (UV)sizeof(PerlIO_funcs) );
1138 if (tab->size < sizeof(PerlIOl)) {
1140 "%s (%" UVuf ") smaller than %s (%" UVuf ")",
1141 "PerlIO layer instance size", (UV)tab->size,
1142 "size expected by this perl", (UV)sizeof(PerlIOl) );
1144 /* Real layer with a data area */
1147 Newxz(temp, tab->size, char);
1151 l->tab = (PerlIO_funcs*) tab;
1152 l->head = ((PerlIOl*)f)->head;
1154 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1155 (void*)f, tab->name,
1156 (mode) ? mode : "(Null)", (void*)arg) );
1157 if (*l->tab->Pushed &&
1159 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1160 PerlIO_pop(aTHX_ f);
1169 /* Pseudo-layer where push does its own stack adjust */
1170 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1171 (mode) ? mode : "(Null)", (void*)arg) );
1173 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1181 PerlIOBase_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1182 IV n, const char *mode, int fd, int imode, int perm,
1183 PerlIO *old, int narg, SV **args)
1185 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_layer(aTHX_ 0));
1186 if (tab && tab->Open) {
1187 PerlIO* ret = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm, old, narg, args);
1188 if (ret && PerlIO_push(aTHX_ ret, self, mode, PerlIOArg) == NULL) {
1194 SETERRNO(EINVAL, LIB_INVARG);
1199 PerlIOBase_binmode(pTHX_ PerlIO *f)
1201 if (PerlIOValid(f)) {
1202 /* Is layer suitable for raw stream ? */
1203 if (PerlIOBase(f)->tab && PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1204 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1205 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1208 /* Not suitable - pop it */
1209 PerlIO_pop(aTHX_ f);
1217 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1219 PERL_UNUSED_ARG(mode);
1220 PERL_UNUSED_ARG(arg);
1221 PERL_UNUSED_ARG(tab);
1223 if (PerlIOValid(f)) {
1228 * Strip all layers that are not suitable for a raw stream
1231 while (t && (l = *t)) {
1232 if (l->tab && l->tab->Binmode) {
1233 /* Has a handler - normal case */
1234 if ((*l->tab->Binmode)(aTHX_ t) == 0) {
1236 /* Layer still there - move down a layer */
1245 /* No handler - pop it */
1246 PerlIO_pop(aTHX_ t);
1249 if (PerlIOValid(f)) {
1250 DEBUG_i( PerlIO_debug(":raw f=%p :%s\n", (void*)f,
1251 PerlIOBase(f)->tab ? PerlIOBase(f)->tab->name : "(Null)") );
1259 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1260 PerlIO_list_t *layers, IV n, IV max)
1264 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1266 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1277 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1281 save_scalar(PL_errgv);
1283 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1284 code = PerlIO_parse_layers(aTHX_ layers, names);
1286 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1288 PerlIO_list_free(aTHX_ layers);
1295 /*--------------------------------------------------------------------------------------*/
1297 * Given the abstraction above the public API functions
1301 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1303 PERL_UNUSED_ARG(iotype);
1304 PERL_UNUSED_ARG(mode);
1307 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1308 (PerlIOBase(f) && PerlIOBase(f)->tab) ?
1309 PerlIOBase(f)->tab->name : "(Null)",
1310 iotype, mode, (names) ? names : "(Null)") );
1313 /* Do not flush etc. if (e.g.) switching encodings.
1314 if a pushed layer knows it needs to flush lower layers
1315 (for example :unix which is never going to call them)
1316 it can do the flush when it is pushed.
1318 return cBOOL(PerlIO_apply_layers(aTHX_ f, NULL, names) == 0);
1321 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1322 #ifdef PERLIO_USING_CRLF
1323 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1324 O_BINARY so we can look for it in mode.
1326 if (!(mode & O_BINARY)) {
1328 /* FIXME?: Looking down the layer stack seems wrong,
1329 but is a way of reaching past (say) an encoding layer
1330 to flip CRLF-ness of the layer(s) below
1333 /* Perhaps we should turn on bottom-most aware layer
1334 e.g. Ilya's idea that UNIX TTY could serve
1336 if (PerlIOBase(f)->tab &&
1337 PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF)
1339 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1340 /* Not in text mode - flush any pending stuff and flip it */
1342 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1344 /* Only need to turn it on in one layer so we are done */
1349 /* Not finding a CRLF aware layer presumably means we are binary
1350 which is not what was requested - so we failed
1351 We _could_ push :crlf layer but so could caller
1356 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1357 So code that used to be here is now in PerlIORaw_pushed().
1359 return cBOOL(PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL));
1364 PerlIO__close(pTHX_ PerlIO *f)
1366 if (PerlIOValid(f)) {
1367 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1368 if (tab && tab->Close)
1369 return (*tab->Close)(aTHX_ f);
1371 return PerlIOBase_close(aTHX_ f);
1374 SETERRNO(EBADF, SS_IVCHAN);
1380 Perl_PerlIO_close(pTHX_ PerlIO *f)
1382 const int code = PerlIO__close(aTHX_ f);
1383 while (PerlIOValid(f)) {
1384 PerlIO_pop(aTHX_ f);
1385 if (PerlIO_lockcnt(f))
1386 /* we're in use; the 'pop' deferred freeing the structure */
1393 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1395 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1399 static PerlIO_funcs *
1400 PerlIO_layer_from_ref(pTHX_ SV *sv)
1403 * For any scalar type load the handler which is bundled with perl
1405 if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
1406 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1407 /* This isn't supposed to happen, since PerlIO::scalar is core,
1408 * but could happen anyway in smaller installs or with PAR */
1410 /* diag_listed_as: Unknown PerlIO layer "%s" */
1411 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1416 * For other types allow if layer is known but don't try and load it
1418 switch (SvTYPE(sv)) {
1420 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1422 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1424 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1426 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1433 PerlIO_resolve_layers(pTHX_ const char *layers,
1434 const char *mode, int narg, SV **args)
1436 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1439 PerlIO_stdstreams(aTHX);
1441 SV * const arg = *args;
1443 * If it is a reference but not an object see if we have a handler
1446 if (SvROK(arg) && !SvOBJECT(SvRV(arg))) {
1447 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1449 def = PerlIO_list_alloc(aTHX);
1450 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1454 * Don't fail if handler cannot be found :via(...) etc. may do
1455 * something sensible else we will just stringfy and open
1460 if (!layers || !*layers)
1461 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1462 if (layers && *layers) {
1465 av = PerlIO_clone_list(aTHX_ def, NULL);
1470 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1474 PerlIO_list_free(aTHX_ av);
1486 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1487 int imode, int perm, PerlIO *f, int narg, SV **args)
1489 if (!f && narg == 1 && *args == &PL_sv_undef) {
1490 if ((f = PerlIO_tmpfile())) {
1491 if (!layers || !*layers)
1492 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1493 if (layers && *layers)
1494 PerlIO_apply_layers(aTHX_ f, mode, layers);
1498 PerlIO_list_t *layera;
1500 PerlIO_funcs *tab = NULL;
1501 if (PerlIOValid(f)) {
1503 * This is "reopen" - it is not tested as perl does not use it
1507 layera = PerlIO_list_alloc(aTHX);
1510 if (l->tab && l->tab->Getarg)
1511 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1512 PerlIO_list_push(aTHX_ layera, l->tab,
1513 (arg) ? arg : &PL_sv_undef);
1515 l = *PerlIONext(&l);
1519 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1525 * Start at "top" of layer stack
1527 n = layera->cur - 1;
1529 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1538 * Found that layer 'n' can do opens - call it
1540 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1541 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1543 DEBUG_i( PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1544 tab->name, layers ? layers : "(Null)", mode, fd,
1545 imode, perm, (void*)f, narg, (void*)args) );
1547 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1550 SETERRNO(EINVAL, LIB_INVARG);
1554 if (n + 1 < layera->cur) {
1556 * More layers above the one that we used to open -
1559 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1560 /* If pushing layers fails close the file */
1567 PerlIO_list_free(aTHX_ layera);
1574 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1576 PERL_ARGS_ASSERT_PERLIO_READ;
1578 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1582 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1584 PERL_ARGS_ASSERT_PERLIO_UNREAD;
1586 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1590 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1592 PERL_ARGS_ASSERT_PERLIO_WRITE;
1594 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1598 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1600 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1604 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1606 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1610 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1614 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1616 if (tab && tab->Flush)
1617 return (*tab->Flush) (aTHX_ f);
1619 return 0; /* If no Flush defined, silently succeed. */
1622 DEBUG_i( PerlIO_debug("Cannot flush f=%p\n", (void*)f) );
1623 SETERRNO(EBADF, SS_IVCHAN);
1629 * Is it good API design to do flush-all on NULL, a potentially
1630 * erroneous input? Maybe some magical value (PerlIO*
1631 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1632 * things on fflush(NULL), but should we be bound by their design
1635 PerlIOl **table = &PL_perlio;
1638 while ((ff = *table)) {
1640 table = (PerlIOl **) (ff++);
1641 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1642 if (ff->next && PerlIO_flush(&(ff->next)) != 0)
1652 PerlIOBase_flush_linebuf(pTHX)
1654 PerlIOl **table = &PL_perlio;
1656 while ((f = *table)) {
1658 table = (PerlIOl **) (f++);
1659 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1661 && (PerlIOBase(&(f->next))->
1662 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1663 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1664 PerlIO_flush(&(f->next));
1671 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1673 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1677 PerlIO_isutf8(PerlIO *f)
1680 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1682 SETERRNO(EBADF, SS_IVCHAN);
1688 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1690 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1694 Perl_PerlIO_error(pTHX_ PerlIO *f)
1696 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1700 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1702 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1706 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1708 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1712 PerlIO_has_base(PerlIO *f)
1714 if (PerlIOValid(f)) {
1715 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1718 return (tab->Get_base != NULL);
1725 PerlIO_fast_gets(PerlIO *f)
1727 if (PerlIOValid(f)) {
1728 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
1729 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1732 return (tab->Set_ptrcnt != NULL);
1740 PerlIO_has_cntptr(PerlIO *f)
1742 if (PerlIOValid(f)) {
1743 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1746 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1753 PerlIO_canset_cnt(PerlIO *f)
1755 if (PerlIOValid(f)) {
1756 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1759 return (tab->Set_ptrcnt != NULL);
1766 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1768 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1772 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1774 /* Note that Get_bufsiz returns a Size_t */
1775 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1779 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1781 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1785 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1787 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1791 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, SSize_t cnt)
1793 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1797 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
1799 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1803 /*--------------------------------------------------------------------------------------*/
1805 * utf8 and raw dummy layers
1809 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1811 PERL_UNUSED_CONTEXT;
1812 PERL_UNUSED_ARG(mode);
1813 PERL_UNUSED_ARG(arg);
1814 if (PerlIOValid(f)) {
1815 if (tab && tab->kind & PERLIO_K_UTF8)
1816 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1818 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1824 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1825 sizeof(PerlIO_funcs),
1828 PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
1848 NULL, /* get_base */
1849 NULL, /* get_bufsiz */
1852 NULL, /* set_ptrcnt */
1855 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1856 sizeof(PerlIO_funcs),
1859 PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
1879 NULL, /* get_base */
1880 NULL, /* get_bufsiz */
1883 NULL, /* set_ptrcnt */
1886 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1887 sizeof(PerlIO_funcs),
1910 NULL, /* get_base */
1911 NULL, /* get_bufsiz */
1914 NULL, /* set_ptrcnt */
1916 /*--------------------------------------------------------------------------------------*/
1917 /*--------------------------------------------------------------------------------------*/
1919 * "Methods" of the "base class"
1923 PerlIOBase_fileno(pTHX_ PerlIO *f)
1925 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1929 PerlIO_modestr(PerlIO * f, char *buf)
1932 if (PerlIOValid(f)) {
1933 const IV flags = PerlIOBase(f)->flags;
1934 if (flags & PERLIO_F_APPEND) {
1936 if (flags & PERLIO_F_CANREAD) {
1940 else if (flags & PERLIO_F_CANREAD) {
1942 if (flags & PERLIO_F_CANWRITE)
1945 else if (flags & PERLIO_F_CANWRITE) {
1947 if (flags & PERLIO_F_CANREAD) {
1951 #ifdef PERLIO_USING_CRLF
1952 if (!(flags & PERLIO_F_CRLF))
1962 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1964 PerlIOl * const l = PerlIOBase(f);
1965 PERL_UNUSED_CONTEXT;
1966 PERL_UNUSED_ARG(arg);
1968 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1969 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1970 if (tab && tab->Set_ptrcnt != NULL)
1971 l->flags |= PERLIO_F_FASTGETS;
1973 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
1977 l->flags |= PERLIO_F_CANREAD;
1980 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1983 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1986 SETERRNO(EINVAL, LIB_INVARG);
1991 /* The mode variable contains one positional parameter followed by
1992 * optional keyword parameters. The positional parameters must be
1993 * passed as lowercase characters. The keyword parameters can be
1994 * passed in mixed case. They must be separated by commas. Only one
1995 * instance of a keyword can be specified. */
2001 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2005 l->flags &= ~PERLIO_F_CRLF;
2009 l->flags |= PERLIO_F_CRLF;
2023 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2026 l->flags &= ~PERLIO_F_CRLF;
2029 l->flags |= PERLIO_F_CRLF;
2032 SETERRNO(EINVAL, LIB_INVARG);
2040 l->flags |= l->next->flags &
2041 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2047 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2048 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2049 l->flags, PerlIO_modestr(f, temp));
2056 PerlIOBase_popped(pTHX_ PerlIO *f)
2058 PERL_UNUSED_CONTEXT;
2064 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2067 * Save the position as current head considers it
2069 const Off_t old = PerlIO_tell(f);
2070 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2071 PerlIOSelf(f, PerlIOBuf)->posn = old;
2072 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2076 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2078 STDCHAR *buf = (STDCHAR *) vbuf;
2080 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2081 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2082 SETERRNO(EBADF, SS_IVCHAN);
2083 PerlIO_save_errno(f);
2089 SSize_t avail = PerlIO_get_cnt(f);
2092 take = (((SSize_t) count >= 0) && ((SSize_t)count < avail)) ? (SSize_t)count : avail;
2094 STDCHAR *ptr = PerlIO_get_ptr(f);
2095 Copy(ptr, buf, take, STDCHAR);
2096 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2099 if (avail == 0) /* set_ptrcnt could have reset avail */
2102 if (count > 0 && avail <= 0) {
2103 if (PerlIO_fill(f) != 0)
2108 return (buf - (STDCHAR *) vbuf);
2114 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2116 PERL_UNUSED_CONTEXT;
2122 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2124 PERL_UNUSED_CONTEXT;
2130 PerlIOBase_close(pTHX_ PerlIO *f)
2133 if (PerlIOValid(f)) {
2134 PerlIO *n = PerlIONext(f);
2135 code = PerlIO_flush(f);
2136 PerlIOBase(f)->flags &=
2137 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2138 while (PerlIOValid(n)) {
2139 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2140 if (tab && tab->Close) {
2141 if ((*tab->Close)(aTHX_ n) != 0)
2146 PerlIOBase(n)->flags &=
2147 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2153 SETERRNO(EBADF, SS_IVCHAN);
2159 PerlIOBase_eof(pTHX_ PerlIO *f)
2161 PERL_UNUSED_CONTEXT;
2162 if (PerlIOValid(f)) {
2163 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2169 PerlIOBase_error(pTHX_ PerlIO *f)
2171 PERL_UNUSED_CONTEXT;
2172 if (PerlIOValid(f)) {
2173 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2179 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2181 if (PerlIOValid(f)) {
2182 PerlIO * const n = PerlIONext(f);
2183 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2190 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2192 PERL_UNUSED_CONTEXT;
2193 if (PerlIOValid(f)) {
2194 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2199 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2205 arg = sv_dup(arg, param);
2206 SvREFCNT_inc_simple_void_NN(arg);
2210 return newSVsv(arg);
2213 PERL_UNUSED_ARG(param);
2214 return newSVsv(arg);
2219 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2221 PerlIO * const nexto = PerlIONext(o);
2222 if (PerlIOValid(nexto)) {
2223 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2224 if (tab && tab->Dup)
2225 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2227 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2230 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2234 DEBUG_i(PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2236 (void*)f, (void*)o, (void*)param) );
2238 arg = (*self->Getarg)(aTHX_ o, param, flags);
2239 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2240 if (f && PerlIOBase(o)->flags & PERLIO_F_UTF8)
2241 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
2247 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2249 /* Must be called with PL_perlio_mutex locked. */
2251 S_more_refcounted_fds(pTHX_ const int new_fd)
2252 PERL_TSA_REQUIRES(PL_perlio_mutex)
2255 const int old_max = PL_perlio_fd_refcnt_size;
2256 const int new_max = 16 + (new_fd & ~15);
2259 #ifndef PERL_IMPLICIT_SYS
2260 PERL_UNUSED_CONTEXT;
2263 DEBUG_i( PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2264 old_max, new_fd, new_max) );
2266 if (new_fd < old_max) {
2270 assert (new_max > new_fd);
2272 /* Use plain realloc() since we need this memory to be really
2273 * global and visible to all the interpreters and/or threads. */
2274 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2277 MUTEX_UNLOCK(&PL_perlio_mutex);
2281 PL_perlio_fd_refcnt_size = new_max;
2282 PL_perlio_fd_refcnt = new_array;
2284 DEBUG_i( PerlIO_debug("Zeroing %p, %d\n",
2285 (void*)(new_array + old_max),
2286 new_max - old_max) );
2288 Zero(new_array + old_max, new_max - old_max, int);
2295 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2296 PERL_UNUSED_CONTEXT;
2300 PerlIOUnix_refcnt_inc(int fd)
2306 MUTEX_LOCK(&PL_perlio_mutex);
2307 if (fd >= PL_perlio_fd_refcnt_size)
2308 S_more_refcounted_fds(aTHX_ fd);
2310 PL_perlio_fd_refcnt[fd]++;
2311 if (PL_perlio_fd_refcnt[fd] <= 0) {
2312 /* diag_listed_as: refcnt_inc: fd %d%s */
2313 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2314 fd, PL_perlio_fd_refcnt[fd]);
2316 DEBUG_i( PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2317 fd, PL_perlio_fd_refcnt[fd]) );
2319 MUTEX_UNLOCK(&PL_perlio_mutex);
2321 /* diag_listed_as: refcnt_inc: fd %d%s */
2322 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2327 PerlIOUnix_refcnt_dec(int fd)
2336 MUTEX_LOCK(&PL_perlio_mutex);
2337 if (fd >= PL_perlio_fd_refcnt_size) {
2338 /* diag_listed_as: refcnt_dec: fd %d%s */
2339 Perl_croak_nocontext("refcnt_dec: fd %d >= refcnt_size %d\n",
2340 fd, PL_perlio_fd_refcnt_size);
2342 if (PL_perlio_fd_refcnt[fd] <= 0) {
2343 /* diag_listed_as: refcnt_dec: fd %d%s */
2344 Perl_croak_nocontext("refcnt_dec: fd %d: %d <= 0\n",
2345 fd, PL_perlio_fd_refcnt[fd]);
2347 cnt = --PL_perlio_fd_refcnt[fd];
2348 DEBUG_i( PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt) );
2349 MUTEX_UNLOCK(&PL_perlio_mutex);
2351 /* diag_listed_as: refcnt_dec: fd %d%s */
2352 Perl_croak_nocontext("refcnt_dec: fd %d < 0\n", fd);
2358 PerlIOUnix_refcnt(int fd)
2364 MUTEX_LOCK(&PL_perlio_mutex);
2365 if (fd >= PL_perlio_fd_refcnt_size) {
2366 /* diag_listed_as: refcnt: fd %d%s */
2367 Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
2368 fd, PL_perlio_fd_refcnt_size);
2370 if (PL_perlio_fd_refcnt[fd] <= 0) {
2371 /* diag_listed_as: refcnt: fd %d%s */
2372 Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
2373 fd, PL_perlio_fd_refcnt[fd]);
2375 cnt = PL_perlio_fd_refcnt[fd];
2376 MUTEX_UNLOCK(&PL_perlio_mutex);
2378 /* diag_listed_as: refcnt: fd %d%s */
2379 Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
2385 PerlIO_cleanup(pTHX)
2389 DEBUG_i( PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX) );
2391 DEBUG_i( PerlIO_debug("Cleanup layers\n") );
2394 /* Raise STDIN..STDERR refcount so we don't close them */
2395 for (i=0; i < 3; i++)
2396 PerlIOUnix_refcnt_inc(i);
2397 PerlIO_cleantable(aTHX_ &PL_perlio);
2398 /* Restore STDIN..STDERR refcount */
2399 for (i=0; i < 3; i++)
2400 PerlIOUnix_refcnt_dec(i);
2402 if (PL_known_layers) {
2403 PerlIO_list_free(aTHX_ PL_known_layers);
2404 PL_known_layers = NULL;
2406 if (PL_def_layerlist) {
2407 PerlIO_list_free(aTHX_ PL_def_layerlist);
2408 PL_def_layerlist = NULL;
2412 void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
2416 /* XXX we can't rely on an interpreter being present at this late stage,
2417 XXX so we can't use a function like PerlLIO_write that relies on one
2418 being present (at least in win32) :-(.
2423 /* By now all filehandles should have been closed, so any
2424 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2426 #define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
2427 #define PERLIO_TEARDOWN_MESSAGE_FD 2
2428 char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
2430 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2431 if (PL_perlio_fd_refcnt[i]) {
2433 my_snprintf(buf, sizeof(buf),
2434 "PerlIO_teardown: fd %d refcnt=%d\n",
2435 i, PL_perlio_fd_refcnt[i]);
2436 PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
2442 /* Not bothering with PL_perlio_mutex since by now
2443 * all the interpreters are gone. */
2444 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2445 && PL_perlio_fd_refcnt) {
2446 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2447 PL_perlio_fd_refcnt = NULL;
2448 PL_perlio_fd_refcnt_size = 0;
2452 /*--------------------------------------------------------------------------------------*/
2454 * Bottom-most level for UNIX-like case
2458 struct _PerlIO base; /* The generic part */
2459 int fd; /* UNIX like file descriptor */
2460 int oflags; /* open/fcntl flags */
2464 S_lockcnt_dec(pTHX_ const void* f)
2466 #ifndef PERL_IMPLICIT_SYS
2467 PERL_UNUSED_CONTEXT;
2469 PerlIO_lockcnt((PerlIO*)f)--;
2473 /* call the signal handler, and if that handler happens to clear
2474 * this handle, free what we can and return true */
2477 S_perlio_async_run(pTHX_ PerlIO* f) {
2479 SAVEDESTRUCTOR_X(S_lockcnt_dec, (void*)f);
2480 PerlIO_lockcnt(f)++;
2482 if ( !(PerlIOBase(f)->flags & PERLIO_F_CLEARED) ) {
2486 /* we've just run some perl-level code that could have done
2487 * anything, including closing the file or clearing this layer.
2488 * If so, free any lower layers that have already been
2489 * cleared, then return an error. */
2490 while (PerlIOValid(f) &&
2491 (PerlIOBase(f)->flags & PERLIO_F_CLEARED))
2493 const PerlIOl *l = *f;
2502 PerlIOUnix_oflags(const char *mode)
2505 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2510 if (*++mode == '+') {
2517 oflags = O_CREAT | O_TRUNC;
2518 if (*++mode == '+') {
2527 oflags = O_CREAT | O_APPEND;
2528 if (*++mode == '+') {
2537 /* XXX TODO: PerlIO_open() test that exercises 'rb' and 'rt'. */
2539 /* Unless O_BINARY is different from O_TEXT, first bit-or:ing one
2540 * of them in, and then bit-and-masking the other them away, won't
2541 * have much of an effect. */
2544 #if O_TEXT != O_BINARY
2551 #if O_TEXT != O_BINARY
2553 oflags &= ~O_BINARY;
2559 /* bit-or:ing with zero O_BINARY would be useless. */
2561 * If neither "t" nor "b" was specified, open the file
2564 * Note that if something else than the zero byte was seen
2565 * here (e.g. bogus mode "rx"), just few lines later we will
2566 * set the errno and invalidate the flags.
2572 if (*mode || oflags == -1) {
2573 SETERRNO(EINVAL, LIB_INVARG);
2580 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2582 PERL_UNUSED_CONTEXT;
2583 return PerlIOSelf(f, PerlIOUnix)->fd;
2587 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2589 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2592 if (PerlLIO_fstat(fd, &st) == 0) {
2593 if (!S_ISREG(st.st_mode)) {
2594 DEBUG_i( PerlIO_debug("%d is not regular file\n",fd) );
2595 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2598 DEBUG_i( PerlIO_debug("%d _is_ a regular file\n",fd) );
2604 PerlIOUnix_refcnt_inc(fd);
2605 PERL_UNUSED_CONTEXT;
2609 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2611 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2612 if (*PerlIONext(f)) {
2613 /* We never call down so do any pending stuff now */
2614 PerlIO_flush(PerlIONext(f));
2616 * XXX could (or should) we retrieve the oflags from the open file
2617 * handle rather than believing the "mode" we are passed in? XXX
2618 * Should the value on NULL mode be 0 or -1?
2620 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2621 mode ? PerlIOUnix_oflags(mode) : -1);
2623 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2629 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2631 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2633 PERL_UNUSED_CONTEXT;
2634 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2636 SETERRNO(ESPIPE, LIB_INVARG);
2638 SETERRNO(EINVAL, LIB_INVARG);
2642 new_loc = PerlLIO_lseek(fd, offset, whence);
2643 if (new_loc == (Off_t) - 1)
2645 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2650 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2651 IV n, const char *mode, int fd, int imode,
2652 int perm, PerlIO *f, int narg, SV **args)
2654 if (PerlIOValid(f)) {
2655 if (PerlIOBase(f)->tab && PerlIOBase(f)->flags & PERLIO_F_OPEN)
2656 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2659 if (*mode == IoTYPE_NUMERIC)
2662 imode = PerlIOUnix_oflags(mode);
2664 perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
2671 const char *path = SvPV_const(*args, len);
2672 if (!IS_SAFE_PATHNAME(path, len, "open"))
2674 fd = PerlLIO_open3(path, imode, perm);
2678 if (*mode == IoTYPE_IMPLICIT)
2681 f = PerlIO_allocate(aTHX);
2683 if (!PerlIOValid(f)) {
2684 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2689 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2690 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2691 if (*mode == IoTYPE_APPEND)
2692 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2699 * FIXME: pop layers ???
2707 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2709 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2711 if (flags & PERLIO_DUP_FD) {
2712 fd = PerlLIO_dup(fd);
2715 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2717 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2718 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2728 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2731 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2733 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2734 #ifdef PERLIO_STD_SPECIAL
2736 return PERLIO_STD_IN(fd, vbuf, count);
2738 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2739 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2743 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2744 if (len >= 0 || errno != EINTR) {
2746 if (errno != EAGAIN) {
2747 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2748 PerlIO_save_errno(f);
2751 else if (len == 0 && count != 0) {
2752 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2758 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2761 NOT_REACHED; /*NOTREACHED*/
2765 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2768 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2770 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2771 #ifdef PERLIO_STD_SPECIAL
2772 if (fd == 1 || fd == 2)
2773 return PERLIO_STD_OUT(fd, vbuf, count);
2776 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2777 if (len >= 0 || errno != EINTR) {
2779 if (errno != EAGAIN) {
2780 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2781 PerlIO_save_errno(f);
2787 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2790 NOT_REACHED; /*NOTREACHED*/
2794 PerlIOUnix_tell(pTHX_ PerlIO *f)
2796 PERL_UNUSED_CONTEXT;
2798 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2803 PerlIOUnix_close(pTHX_ PerlIO *f)
2805 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2807 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2808 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2809 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2814 SETERRNO(EBADF,SS_IVCHAN);
2817 while (PerlLIO_close(fd) != 0) {
2818 if (errno != EINTR) {
2823 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2827 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2832 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2833 sizeof(PerlIO_funcs),
2840 PerlIOBase_binmode, /* binmode */
2850 PerlIOBase_noop_ok, /* flush */
2851 PerlIOBase_noop_fail, /* fill */
2854 PerlIOBase_clearerr,
2855 PerlIOBase_setlinebuf,
2856 NULL, /* get_base */
2857 NULL, /* get_bufsiz */
2860 NULL, /* set_ptrcnt */
2863 /*--------------------------------------------------------------------------------------*/
2868 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2869 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2870 broken by the last second glibc 2.3 fix
2872 #define STDIO_BUFFER_WRITABLE
2877 struct _PerlIO base;
2878 FILE *stdio; /* The stream */
2882 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2884 PERL_UNUSED_CONTEXT;
2886 if (PerlIOValid(f)) {
2887 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2889 return PerlSIO_fileno(s);
2896 PerlIOStdio_mode(const char *mode, char *tmode)
2898 char * const ret = tmode;
2904 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2912 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2915 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2916 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2917 if (toptab == tab) {
2918 /* Top is already stdio - pop self (duplicate) and use original */
2919 PerlIO_pop(aTHX_ f);
2922 const int fd = PerlIO_fileno(n);
2925 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2926 mode = PerlIOStdio_mode(mode, tmode)))) {
2927 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2928 /* We never call down so do any pending stuff now */
2929 PerlIO_flush(PerlIONext(f));
2930 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2937 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2942 PerlIO_importFILE(FILE *stdio, const char *mode)
2948 char filename[FILENAME_MAX];
2953 int fd0 = fileno(stdio);
2956 rc = fldata(stdio,filename,&fileinfo);
2960 if(fileinfo.__dsorgHFS){
2963 /*This MVS dataset , OK!*/
2968 if (!mode || !*mode) {
2969 /* We need to probe to see how we can open the stream
2970 so start with read/write and then try write and read
2971 we dup() so that we can fclose without loosing the fd.
2973 Note that the errno value set by a failing fdopen
2974 varies between stdio implementations.
2976 const int fd = PerlLIO_dup(fd0);
2981 f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2983 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2986 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2989 /* Don't seem to be able to open */
2995 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2996 s = PerlIOSelf(f, PerlIOStdio);
2999 fd0 = fileno(stdio);
3001 PerlIOUnix_refcnt_inc(fd0);
3004 rc = fldata(stdio,filename,&fileinfo);
3006 PerlIOUnix_refcnt_inc(fd0);
3008 if(fileinfo.__dsorgHFS){
3009 PerlIOUnix_refcnt_inc(fd0);
3011 /*This MVS dataset , OK!*/
3014 PerlIOUnix_refcnt_inc(fileno(stdio));
3022 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3023 IV n, const char *mode, int fd, int imode,
3024 int perm, PerlIO *f, int narg, SV **args)
3027 if (PerlIOValid(f)) {
3029 const char * const path = SvPV_const(*args, len);
3030 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
3032 if (!IS_SAFE_PATHNAME(path, len, "open"))
3034 PerlIOUnix_refcnt_dec(fileno(s->stdio));
3035 stdio = PerlSIO_freopen(path, PerlIOStdio_mode(mode, tmode),
3040 PerlIOUnix_refcnt_inc(fileno(s->stdio));
3046 const char * const path = SvPV_const(*args, len);
3047 if (!IS_SAFE_PATHNAME(path, len, "open"))
3049 if (*mode == IoTYPE_NUMERIC) {
3051 fd = PerlLIO_open3(path, imode, perm);
3055 bool appended = FALSE;
3057 /* Cygwin wants its 'b' early. */
3059 mode = PerlIOStdio_mode(mode, tmode);
3061 stdio = PerlSIO_fopen(path, mode);
3064 f = PerlIO_allocate(aTHX);
3067 mode = PerlIOStdio_mode(mode, tmode);
3068 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
3070 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3071 PerlIOUnix_refcnt_inc(fileno(stdio));
3073 PerlSIO_fclose(stdio);
3085 if (*mode == IoTYPE_IMPLICIT) {
3092 stdio = PerlSIO_stdin;
3095 stdio = PerlSIO_stdout;
3098 stdio = PerlSIO_stderr;
3103 stdio = PerlSIO_fdopen(fd, mode =
3104 PerlIOStdio_mode(mode, tmode));
3108 f = PerlIO_allocate(aTHX);
3110 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
3111 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3112 PerlIOUnix_refcnt_inc(fileno(stdio));
3123 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3125 /* This assumes no layers underneath - which is what
3126 happens, but is not how I remember it. NI-S 2001/10/16
3128 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
3129 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
3130 const int fd = fileno(stdio);
3132 if (flags & PERLIO_DUP_FD) {
3133 const int dfd = PerlLIO_dup(fileno(stdio));
3135 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
3140 /* FIXME: To avoid messy error recovery if dup fails
3141 re-use the existing stdio as though flag was not set
3145 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3147 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3149 PerlIOUnix_refcnt_inc(fileno(stdio));
3156 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3158 PERL_UNUSED_CONTEXT;
3160 /* XXX this could use PerlIO_canset_fileno() and
3161 * PerlIO_set_fileno() support from Configure
3163 # if defined(HAS_FDCLOSE)
3164 return fdclose(f, NULL) == 0 ? 1 : 0;
3165 # elif defined(__UCLIBC__)
3166 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3169 # elif defined(__GLIBC__)
3170 /* There may be a better way for GLIBC:
3171 - libio.h defines a flag to not close() on cleanup
3175 # elif defined(__sun)
3178 # elif defined(__hpux)
3182 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3183 your platform does not have special entry try this one.
3184 [For OSF only have confirmation for Tru64 (alpha)
3185 but assume other OSFs will be similar.]
3187 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3190 # elif defined(__FreeBSD__)
3191 /* There may be a better way on FreeBSD:
3192 - we could insert a dummy func in the _close function entry
3193 f->_close = (int (*)(void *)) dummy_close;
3197 # elif defined(__OpenBSD__)
3198 /* There may be a better way on OpenBSD:
3199 - we could insert a dummy func in the _close function entry
3200 f->_close = (int (*)(void *)) dummy_close;
3204 # elif defined(__EMX__)
3205 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3208 # elif defined(__CYGWIN__)
3209 /* There may be a better way on CYGWIN:
3210 - we could insert a dummy func in the _close function entry
3211 f->_close = (int (*)(void *)) dummy_close;
3215 # elif defined(WIN32)
3216 # if defined(UNDER_CE)
3217 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3221 PERLIO_FILE_file(f) = -1;
3226 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3227 (which isn't thread safe) instead
3229 # error "Don't know how to set FILE.fileno on your platform"
3237 PerlIOStdio_close(pTHX_ PerlIO *f)
3239 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3245 const int fd = fileno(stdio);
3253 #ifdef SOCKS5_VERSION_NAME
3254 /* Socks lib overrides close() but stdio isn't linked to
3255 that library (though we are) - so we must call close()
3256 on sockets on stdio's behalf.
3259 Sock_size_t optlen = sizeof(int);
3260 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3263 /* Test for -1, as *BSD stdio (at least) on fclose sets the FILE* such
3264 that a subsequent fileno() on it returns -1. Don't want to croak()
3265 from within PerlIOUnix_refcnt_dec() if some buggy caller code is
3266 trying to close an already closed handle which somehow it still has
3267 a reference to. (via.xs, I'm looking at you). */
3268 if (fd != -1 && PerlIOUnix_refcnt_dec(fd) > 0) {
3269 /* File descriptor still in use */
3273 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3274 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3276 if (stdio == stdout || stdio == stderr)
3277 return PerlIO_flush(f);
3279 MUTEX_LOCK(&PL_perlio_mutex);
3280 /* Right. We need a mutex here because for a brief while we
3281 will have the situation that fd is actually closed. Hence if
3282 a second thread were to get into this block, its dup() would
3283 likely return our fd as its dupfd. (after all, it is closed)
3284 Then if we get to the dup2() first, we blat the fd back
3285 (messing up its temporary as a side effect) only for it to
3286 then close its dupfd (== our fd) in its close(dupfd) */
3288 /* There is, of course, a race condition, that any other thread
3289 trying to input/output/whatever on this fd will be stuffed
3290 for the duration of this little manoeuvrer. Perhaps we
3291 should hold an IO mutex for the duration of every IO
3292 operation if we know that invalidate doesn't work on this
3293 platform, but that would suck, and could kill performance.
3295 Except that correctness trumps speed.
3296 Advice from klortho #11912. */
3298 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3299 Use Sarathy's trick from maint-5.6 to invalidate the
3300 fileno slot of the FILE *
3302 result = PerlIO_flush(f);
3304 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3306 dupfd = PerlLIO_dup(fd);
3309 /* Oh cXap. This isn't going to go well. Not sure if we can
3310 recover from here, or if closing this particular FILE *
3311 is a good idea now. */
3316 SAVE_ERRNO; /* This is here only to silence compiler warnings */
3318 result = PerlSIO_fclose(stdio);
3319 /* We treat error from stdio as success if we invalidated
3320 errno may NOT be expected EBADF
3322 if (invalidate && result != 0) {
3326 #ifdef SOCKS5_VERSION_NAME
3327 /* in SOCKS' case, let close() determine return value */
3331 PerlLIO_dup2(dupfd,fd);
3332 PerlLIO_close(dupfd);
3334 MUTEX_UNLOCK(&PL_perlio_mutex);
3340 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3344 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3346 s = PerlIOSelf(f, PerlIOStdio)->stdio;
3349 STDCHAR *buf = (STDCHAR *) vbuf;
3351 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3352 * stdio does not do that for fread()
3354 const int ch = PerlSIO_fgetc(s);
3361 got = PerlSIO_fread(vbuf, 1, count, s);
3362 if (got == 0 && PerlSIO_ferror(s))
3364 if (got >= 0 || errno != EINTR)
3366 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3368 SETERRNO(0,0); /* just in case */
3371 /* Under some circumstances IRIX stdio fgetc() and fread()
3372 * set the errno to ENOENT, which makes no sense according
3373 * to either IRIX or POSIX. [rt.perl.org #123977] */
3374 if (errno == ENOENT) SETERRNO(0,0);
3380 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3383 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3385 #ifdef STDIO_BUFFER_WRITABLE
3386 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3387 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3388 STDCHAR *base = PerlIO_get_base(f);
3389 SSize_t cnt = PerlIO_get_cnt(f);
3390 STDCHAR *ptr = PerlIO_get_ptr(f);
3391 SSize_t avail = ptr - base;
3393 if (avail > count) {
3397 Move(buf-avail,ptr,avail,STDCHAR);
3400 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3401 if (PerlSIO_feof(s) && unread >= 0)
3402 PerlSIO_clearerr(s);
3407 if (PerlIO_has_cntptr(f)) {
3408 /* We can get pointer to buffer but not its base
3409 Do ungetc() but check chars are ending up in the
3412 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3413 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3415 const int ch = *--buf & 0xFF;
3416 if (ungetc(ch,s) != ch) {
3417 /* ungetc did not work */
3420 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3421 /* Did not change pointer as expected */
3422 if (fgetc(s) != EOF) /* get char back again */
3432 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3438 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3441 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3444 got = PerlSIO_fwrite(vbuf, 1, count,
3445 PerlIOSelf(f, PerlIOStdio)->stdio);
3446 if (got >= 0 || errno != EINTR)
3448 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3450 SETERRNO(0,0); /* just in case */
3456 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3458 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3459 PERL_UNUSED_CONTEXT;
3461 return PerlSIO_fseek(stdio, offset, whence);
3465 PerlIOStdio_tell(pTHX_ PerlIO *f)
3467 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3468 PERL_UNUSED_CONTEXT;
3470 return PerlSIO_ftell(stdio);
3474 PerlIOStdio_flush(pTHX_ PerlIO *f)
3476 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3477 PERL_UNUSED_CONTEXT;
3479 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3480 return PerlSIO_fflush(stdio);
3486 * FIXME: This discards ungetc() and pre-read stuff which is not
3487 * right if this is just a "sync" from a layer above Suspect right
3488 * design is to do _this_ but not have layer above flush this
3489 * layer read-to-read
3492 * Not writeable - sync by attempting a seek
3495 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3503 PerlIOStdio_eof(pTHX_ PerlIO *f)
3505 PERL_UNUSED_CONTEXT;
3507 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3511 PerlIOStdio_error(pTHX_ PerlIO *f)
3513 PERL_UNUSED_CONTEXT;
3515 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3519 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3521 PERL_UNUSED_CONTEXT;
3523 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3527 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3529 PERL_UNUSED_CONTEXT;
3531 #ifdef HAS_SETLINEBUF
3532 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3534 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3540 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3542 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3543 PERL_UNUSED_CONTEXT;
3544 return (STDCHAR*)PerlSIO_get_base(stdio);
3548 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3550 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3551 PERL_UNUSED_CONTEXT;
3552 return PerlSIO_get_bufsiz(stdio);
3556 #ifdef USE_STDIO_PTR
3558 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3560 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3561 PERL_UNUSED_CONTEXT;
3562 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3566 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3568 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3569 PERL_UNUSED_CONTEXT;
3570 return PerlSIO_get_cnt(stdio);
3574 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3576 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3577 PERL_UNUSED_CONTEXT;
3579 #ifdef STDIO_PTR_LVALUE
3580 /* This is a long-standing infamous mess. The root of the
3581 * problem is that one cannot know the signedness of char, and
3582 * more precisely the signedness of FILE._ptr. The following
3583 * things have been tried, and they have all failed (across
3584 * different compilers (remember that core needs to to build
3585 * also with c++) and compiler options:
3587 * - casting the RHS to (void*) -- works in *some* places
3588 * - casting the LHS to (void*) -- totally unportable
3590 * So let's try silencing the warning at least for gcc. */
3591 GCC_DIAG_IGNORE(-Wpointer-sign);
3592 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3594 #ifdef STDIO_PTR_LVAL_SETS_CNT
3595 assert(PerlSIO_get_cnt(stdio) == (cnt));
3597 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3599 * Setting ptr _does_ change cnt - we are done
3603 #else /* STDIO_PTR_LVALUE */
3605 #endif /* STDIO_PTR_LVALUE */
3608 * Now (or only) set cnt
3610 #ifdef STDIO_CNT_LVALUE
3611 PerlSIO_set_cnt(stdio, cnt);
3612 #else /* STDIO_CNT_LVALUE */
3613 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3614 PerlSIO_set_ptr(stdio,
3615 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3617 #else /* STDIO_PTR_LVAL_SETS_CNT */
3619 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3620 #endif /* STDIO_CNT_LVALUE */
3627 PerlIOStdio_fill(pTHX_ PerlIO *f)
3631 PERL_UNUSED_CONTEXT;
3632 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3634 stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3637 * fflush()ing read-only streams can cause trouble on some stdio-s
3639 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3640 if (PerlSIO_fflush(stdio) != 0)
3644 c = PerlSIO_fgetc(stdio);
3647 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3649 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3654 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3656 #ifdef STDIO_BUFFER_WRITABLE
3657 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3658 /* Fake ungetc() to the real buffer in case system's ungetc
3661 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3662 SSize_t cnt = PerlSIO_get_cnt(stdio);
3663 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3664 if (ptr == base+1) {
3665 *--ptr = (STDCHAR) c;
3666 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3667 if (PerlSIO_feof(stdio))
3668 PerlSIO_clearerr(stdio);
3674 if (PerlIO_has_cntptr(f)) {
3676 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3682 /* If buffer snoop scheme above fails fall back to
3685 if (PerlSIO_ungetc(c, stdio) != c)
3693 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3694 sizeof(PerlIO_funcs),
3696 sizeof(PerlIOStdio),
3697 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3701 PerlIOBase_binmode, /* binmode */
3715 PerlIOStdio_clearerr,
3716 PerlIOStdio_setlinebuf,
3718 PerlIOStdio_get_base,
3719 PerlIOStdio_get_bufsiz,
3724 #ifdef USE_STDIO_PTR
3725 PerlIOStdio_get_ptr,
3726 PerlIOStdio_get_cnt,
3727 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3728 PerlIOStdio_set_ptrcnt,
3731 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3736 #endif /* USE_STDIO_PTR */
3739 /* Note that calls to PerlIO_exportFILE() are reversed using
3740 * PerlIO_releaseFILE(), not importFILE. */
3742 PerlIO_exportFILE(PerlIO * f, const char *mode)
3746 if (PerlIOValid(f)) {
3748 int fd = PerlIO_fileno(f);
3753 if (!mode || !*mode) {
3754 mode = PerlIO_modestr(f, buf);
3756 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3760 /* De-link any lower layers so new :stdio sticks */
3762 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3763 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3765 PerlIOUnix_refcnt_inc(fileno(stdio));
3766 /* Link previous lower layers under new one */
3770 /* restore layers list */
3780 PerlIO_findFILE(PerlIO *f)
3785 if (l->tab == &PerlIO_stdio) {
3786 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3789 l = *PerlIONext(&l);
3791 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3792 /* However, we're not really exporting a FILE * to someone else (who
3793 becomes responsible for closing it, or calling PerlIO_releaseFILE())
3794 So we need to undo its reference count increase on the underlying file
3795 descriptor. We have to do this, because if the loop above returns you
3796 the FILE *, then *it* didn't increase any reference count. So there's
3797 only one way to be consistent. */
3798 stdio = PerlIO_exportFILE(f, NULL);
3800 const int fd = fileno(stdio);
3802 PerlIOUnix_refcnt_dec(fd);
3807 /* Use this to reverse PerlIO_exportFILE calls. */
3809 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3813 if (l->tab == &PerlIO_stdio) {
3814 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3815 if (s->stdio == f) { /* not in a loop */
3816 const int fd = fileno(f);
3818 PerlIOUnix_refcnt_dec(fd);
3821 PerlIO_pop(aTHX_ p);
3831 /*--------------------------------------------------------------------------------------*/
3833 * perlio buffer layer
3837 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3839 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3840 const int fd = PerlIO_fileno(f);
3841 if (fd >= 0 && PerlLIO_isatty(fd)) {
3842 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3844 if (*PerlIONext(f)) {
3845 const Off_t posn = PerlIO_tell(PerlIONext(f));
3846 if (posn != (Off_t) - 1) {
3850 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3854 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3855 IV n, const char *mode, int fd, int imode, int perm,
3856 PerlIO *f, int narg, SV **args)
3858 if (PerlIOValid(f)) {
3859 PerlIO *next = PerlIONext(f);
3861 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3862 if (tab && tab->Open)
3864 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3866 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3871 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3873 if (*mode == IoTYPE_IMPLICIT) {
3879 if (tab && tab->Open)
3880 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3883 SETERRNO(EINVAL, LIB_INVARG);
3885 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3887 * if push fails during open, open fails. close will pop us.
3892 fd = PerlIO_fileno(f);
3893 if (init && fd == 2) {
3895 * Initial stderr is unbuffered
3897 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3899 #ifdef PERLIO_USING_CRLF
3900 # ifdef PERLIO_IS_BINMODE_FD
3901 if (PERLIO_IS_BINMODE_FD(fd))
3902 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3906 * do something about failing setmode()? --jhi
3908 PerlLIO_setmode(fd, O_BINARY);
3911 /* Enable line buffering with record-oriented regular files
3912 * so we don't introduce an extraneous record boundary when
3913 * the buffer fills up.
3915 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3917 if (PerlLIO_fstat(fd, &st) == 0
3918 && S_ISREG(st.st_mode)
3919 && (st.st_fab_rfm == FAB$C_VAR
3920 || st.st_fab_rfm == FAB$C_VFC)) {
3921 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
3932 * This "flush" is akin to sfio's sync in that it handles files in either
3933 * read or write state. For write state, we put the postponed data through
3934 * the next layers. For read state, we seek() the next layers to the
3935 * offset given by current position in the buffer, and discard the buffer
3936 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3937 * in any case?). Then the pass the stick further in chain.
3940 PerlIOBuf_flush(pTHX_ PerlIO *f)
3942 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3944 PerlIO *n = PerlIONext(f);
3945 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3947 * write() the buffer
3949 const STDCHAR *buf = b->buf;
3950 const STDCHAR *p = buf;
3951 while (p < b->ptr) {
3952 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3956 else if (count < 0 || PerlIO_error(n)) {
3957 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3958 PerlIO_save_errno(f);
3963 b->posn += (p - buf);
3965 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3966 STDCHAR *buf = PerlIO_get_base(f);
3968 * Note position change
3970 b->posn += (b->ptr - buf);
3971 if (b->ptr < b->end) {
3972 /* We did not consume all of it - try and seek downstream to
3973 our logical position
3975 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3976 /* Reload n as some layers may pop themselves on seek */
3977 b->posn = PerlIO_tell(n = PerlIONext(f));
3980 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3981 data is lost for good - so return saying "ok" having undone
3984 b->posn -= (b->ptr - buf);
3989 b->ptr = b->end = b->buf;
3990 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3991 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3992 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3997 /* This discards the content of the buffer after b->ptr, and rereads
3998 * the buffer from the position off in the layer downstream; here off
3999 * is at offset corresponding to b->ptr - b->buf.
4002 PerlIOBuf_fill(pTHX_ PerlIO *f)
4004 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4005 PerlIO *n = PerlIONext(f);
4008 * Down-stream flush is defined not to loose read data so is harmless.
4009 * we would not normally be fill'ing if there was data left in anycase.
4011 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
4013 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
4014 PerlIOBase_flush_linebuf(aTHX);
4017 PerlIO_get_base(f); /* allocate via vtable */
4019 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
4021 b->ptr = b->end = b->buf;
4023 if (!PerlIOValid(n)) {
4024 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4028 if (PerlIO_fast_gets(n)) {
4030 * Layer below is also buffered. We do _NOT_ want to call its
4031 * ->Read() because that will loop till it gets what we asked for
4032 * which may hang on a pipe etc. Instead take anything it has to
4033 * hand, or ask it to fill _once_.
4035 avail = PerlIO_get_cnt(n);
4037 avail = PerlIO_fill(n);
4039 avail = PerlIO_get_cnt(n);
4041 if (!PerlIO_error(n) && PerlIO_eof(n))
4046 STDCHAR *ptr = PerlIO_get_ptr(n);
4047 const SSize_t cnt = avail;
4048 if (avail > (SSize_t)b->bufsiz)
4050 Copy(ptr, b->buf, avail, STDCHAR);
4051 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
4055 avail = PerlIO_read(n, b->ptr, b->bufsiz);
4059 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4062 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
4063 PerlIO_save_errno(f);
4067 b->end = b->buf + avail;
4068 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4073 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4075 if (PerlIOValid(f)) {
4076 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4079 return PerlIOBase_read(aTHX_ f, vbuf, count);
4085 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4087 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4088 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4091 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4096 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4098 * Buffer is already a read buffer, we can overwrite any chars
4099 * which have been read back to buffer start
4101 avail = (b->ptr - b->buf);
4105 * Buffer is idle, set it up so whole buffer is available for
4109 b->end = b->buf + avail;
4111 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4113 * Buffer extends _back_ from where we are now
4115 b->posn -= b->bufsiz;
4117 if ((SSize_t) count >= 0 && avail > (SSize_t) count) {
4119 * If we have space for more than count, just move count
4127 * In simple stdio-like ungetc() case chars will be already
4130 if (buf != b->ptr) {
4131 Copy(buf, b->ptr, avail, STDCHAR);
4135 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4139 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
4145 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4147 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4148 const STDCHAR *buf = (const STDCHAR *) vbuf;
4149 const STDCHAR *flushptr = buf;
4153 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4155 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4156 if (PerlIO_flush(f) != 0) {
4160 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4161 flushptr = buf + count;
4162 while (flushptr > buf && *(flushptr - 1) != '\n')
4166 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
4167 if ((SSize_t) count >= 0 && (SSize_t) count < avail)
4169 if (flushptr > buf && flushptr <= buf + avail)
4170 avail = flushptr - buf;
4171 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4173 Copy(buf, b->ptr, avail, STDCHAR);
4178 if (buf == flushptr)
4181 if (b->ptr >= (b->buf + b->bufsiz))
4182 if (PerlIO_flush(f) == -1)
4185 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4191 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4194 if ((code = PerlIO_flush(f)) == 0) {
4195 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4196 code = PerlIO_seek(PerlIONext(f), offset, whence);
4198 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4199 b->posn = PerlIO_tell(PerlIONext(f));
4206 PerlIOBuf_tell(pTHX_ PerlIO *f)
4208 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4210 * b->posn is file position where b->buf was read, or will be written
4212 Off_t posn = b->posn;
4213 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
4214 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4216 /* As O_APPEND files are normally shared in some sense it is better
4221 /* when file is NOT shared then this is sufficient */
4222 PerlIO_seek(PerlIONext(f),0, SEEK_END);
4224 posn = b->posn = PerlIO_tell(PerlIONext(f));
4228 * If buffer is valid adjust position by amount in buffer
4230 posn += (b->ptr - b->buf);
4236 PerlIOBuf_popped(pTHX_ PerlIO *f)
4238 const IV code = PerlIOBase_popped(aTHX_ f);
4239 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4240 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4243 b->ptr = b->end = b->buf = NULL;
4244 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4249 PerlIOBuf_close(pTHX_ PerlIO *f)
4251 const IV code = PerlIOBase_close(aTHX_ f);
4252 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4253 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4256 b->ptr = b->end = b->buf = NULL;
4257 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4262 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
4264 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4271 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4273 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4276 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4277 return (b->end - b->ptr);
4282 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4284 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4285 PERL_UNUSED_CONTEXT;
4289 b->bufsiz = PERLIOBUF_DEFAULT_BUFSIZ;
4290 Newxz(b->buf,b->bufsiz, STDCHAR);
4292 b->buf = (STDCHAR *) & b->oneword;
4293 b->bufsiz = sizeof(b->oneword);
4295 b->end = b->ptr = b->buf;
4301 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4303 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4306 return (b->end - b->buf);
4310 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4312 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4314 PERL_UNUSED_ARG(cnt);
4319 assert(PerlIO_get_cnt(f) == cnt);
4320 assert(b->ptr >= b->buf);
4321 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4325 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4327 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4332 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4333 sizeof(PerlIO_funcs),
4336 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4340 PerlIOBase_binmode, /* binmode */
4354 PerlIOBase_clearerr,
4355 PerlIOBase_setlinebuf,
4360 PerlIOBuf_set_ptrcnt,
4363 /*--------------------------------------------------------------------------------------*/
4365 * Temp layer to hold unread chars when cannot do it any other way
4369 PerlIOPending_fill(pTHX_ PerlIO *f)
4372 * Should never happen
4379 PerlIOPending_close(pTHX_ PerlIO *f)
4382 * A tad tricky - flush pops us, then we close new top
4385 return PerlIO_close(f);
4389 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4392 * A tad tricky - flush pops us, then we seek new top
4395 return PerlIO_seek(f, offset, whence);
4400 PerlIOPending_flush(pTHX_ PerlIO *f)
4402 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4403 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4407 PerlIO_pop(aTHX_ f);
4412 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4418 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4423 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4425 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4426 PerlIOl * const l = PerlIOBase(f);
4428 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4429 * etc. get muddled when it changes mid-string when we auto-pop.
4431 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4432 (PerlIOBase(PerlIONext(f))->
4433 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4438 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4440 SSize_t avail = PerlIO_get_cnt(f);
4442 if ((SSize_t) count >= 0 && (SSize_t)count < avail)
4445 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4446 if (got >= 0 && got < (SSize_t)count) {
4447 const SSize_t more =
4448 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4449 if (more >= 0 || got == 0)
4455 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4456 sizeof(PerlIO_funcs),
4459 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4460 PerlIOPending_pushed,
4463 PerlIOBase_binmode, /* binmode */
4472 PerlIOPending_close,
4473 PerlIOPending_flush,
4477 PerlIOBase_clearerr,
4478 PerlIOBase_setlinebuf,
4483 PerlIOPending_set_ptrcnt,
4488 /*--------------------------------------------------------------------------------------*/
4490 * crlf - translation On read translate CR,LF to "\n" we do this by
4491 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4492 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4494 * c->nl points on the first byte of CR LF pair when it is temporarily
4495 * replaced by LF, or to the last CR of the buffer. In the former case
4496 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4497 * that it ends at c->nl; these two cases can be distinguished by
4498 * *c->nl. c->nl is set during _getcnt() call, and unset during
4499 * _unread() and _flush() calls.
4500 * It only matters for read operations.
4504 PerlIOBuf base; /* PerlIOBuf stuff */
4505 STDCHAR *nl; /* Position of crlf we "lied" about in the
4509 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4510 * Otherwise the :crlf layer would always revert back to
4514 S_inherit_utf8_flag(PerlIO *f)
4516 PerlIO *g = PerlIONext(f);
4517 if (PerlIOValid(g)) {
4518 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4519 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4525 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4528 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4529 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4532 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4533 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4534 PerlIOBase(f)->flags);
4538 /* If the old top layer is a CRLF layer, reactivate it (if
4539 * necessary) and remove this new layer from the stack */
4540 PerlIO *g = PerlIONext(f);
4541 if (PerlIOValid(g)) {
4542 PerlIOl *b = PerlIOBase(g);
4543 if (b && b->tab == &PerlIO_crlf) {
4544 if (!(b->flags & PERLIO_F_CRLF))
4545 b->flags |= PERLIO_F_CRLF;
4546 S_inherit_utf8_flag(g);
4547 PerlIO_pop(aTHX_ f);
4552 S_inherit_utf8_flag(f);
4558 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4560 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4561 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4562 *(c->nl) = NATIVE_0xd;
4565 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4566 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4568 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4569 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4571 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4576 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4577 b->end = b->ptr = b->buf + b->bufsiz;
4578 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4579 b->posn -= b->bufsiz;
4581 while (count > 0 && b->ptr > b->buf) {
4582 const int ch = *--buf;
4584 if (b->ptr - 2 >= b->buf) {
4585 *--(b->ptr) = NATIVE_0xa;
4586 *--(b->ptr) = NATIVE_0xd;
4591 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4592 *--(b->ptr) = NATIVE_0xa; /* Works even if 0xa ==
4606 unread += PerlIOBase_unread(aTHX_ f, (const STDCHAR *) vbuf + unread, count);
4611 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4613 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4615 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4618 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4619 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4620 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == NATIVE_0xd)) {
4621 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4623 while (nl < b->end && *nl != NATIVE_0xd)
4625 if (nl < b->end && *nl == NATIVE_0xd) {
4627 if (nl + 1 < b->end) {
4628 if (nl[1] == NATIVE_0xa) {
4634 * Not CR,LF but just CR
4642 * Blast - found CR as last char in buffer
4647 * They may not care, defer work as long as
4651 return (nl - b->ptr);
4655 b->ptr++; /* say we have read it as far as
4656 * flush() is concerned */
4657 b->buf++; /* Leave space in front of buffer */
4658 /* Note as we have moved buf up flush's
4660 will naturally make posn point at CR
4662 b->bufsiz--; /* Buffer is thus smaller */
4663 code = PerlIO_fill(f); /* Fetch some more */
4664 b->bufsiz++; /* Restore size for next time */
4665 b->buf--; /* Point at space */
4666 b->ptr = nl = b->buf; /* Which is what we hand
4668 *nl = NATIVE_0xd; /* Fill in the CR */
4670 goto test; /* fill() call worked */
4672 * CR at EOF - just fall through
4674 /* Should we clear EOF though ??? */
4679 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4685 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4687 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4688 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4694 if (ptr == b->end && *c->nl == NATIVE_0xd) {
4695 /* Deferred CR at end of buffer case - we lied about count */
4708 * Test code - delete when it works ...
4710 IV flags = PerlIOBase(f)->flags;
4711 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4712 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == NATIVE_0xd) {
4713 /* Deferred CR at end of buffer case - we lied about count */
4719 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4720 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4721 flags, c->nl, b->end, cnt);
4728 * They have taken what we lied about
4730 *(c->nl) = NATIVE_0xd;
4736 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4740 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4742 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4743 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4745 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4746 const STDCHAR *buf = (const STDCHAR *) vbuf;
4747 const STDCHAR * const ebuf = buf + count;
4750 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4752 while (buf < ebuf) {
4753 const STDCHAR * const eptr = b->buf + b->bufsiz;
4754 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4755 while (buf < ebuf && b->ptr < eptr) {
4757 if ((b->ptr + 2) > eptr) {
4765 *(b->ptr)++ = NATIVE_0xd; /* CR */
4766 *(b->ptr)++ = NATIVE_0xa; /* LF */
4768 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4775 *(b->ptr)++ = *buf++;
4777 if (b->ptr >= eptr) {
4783 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4785 return (buf - (STDCHAR *) vbuf);
4790 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4792 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4794 *(c->nl) = NATIVE_0xd;
4797 return PerlIOBuf_flush(aTHX_ f);
4801 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4803 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4804 /* In text mode - flush any pending stuff and flip it */
4805 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4806 #ifndef PERLIO_USING_CRLF
4807 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4808 PerlIO_pop(aTHX_ f);
4814 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4815 sizeof(PerlIO_funcs),
4818 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4820 PerlIOBuf_popped, /* popped */
4822 PerlIOCrlf_binmode, /* binmode */
4826 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4827 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4828 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4836 PerlIOBase_clearerr,
4837 PerlIOBase_setlinebuf,
4842 PerlIOCrlf_set_ptrcnt,
4846 Perl_PerlIO_stdin(pTHX)
4849 PerlIO_stdstreams(aTHX);
4851 return (PerlIO*)&PL_perlio[1];
4855 Perl_PerlIO_stdout(pTHX)
4858 PerlIO_stdstreams(aTHX);
4860 return (PerlIO*)&PL_perlio[2];
4864 Perl_PerlIO_stderr(pTHX)
4867 PerlIO_stdstreams(aTHX);
4869 return (PerlIO*)&PL_perlio[3];
4872 /*--------------------------------------------------------------------------------------*/
4875 PerlIO_getname(PerlIO *f, char *buf)
4880 bool exported = FALSE;
4881 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4883 stdio = PerlIO_exportFILE(f,0);
4887 name = fgetname(stdio, buf);
4888 if (exported) PerlIO_releaseFILE(f,stdio);
4893 PERL_UNUSED_ARG(buf);
4894 Perl_croak_nocontext("Don't know how to get file name");
4900 /*--------------------------------------------------------------------------------------*/
4902 * Functions which can be called on any kind of PerlIO implemented in
4906 #undef PerlIO_fdopen
4908 PerlIO_fdopen(int fd, const char *mode)
4911 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4916 PerlIO_open(const char *path, const char *mode)
4919 SV *name = sv_2mortal(newSVpv(path, 0));
4920 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4923 #undef Perlio_reopen
4925 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4928 SV *name = sv_2mortal(newSVpv(path,0));
4929 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4934 PerlIO_getc(PerlIO *f)
4938 if ( 1 == PerlIO_read(f, buf, 1) ) {
4939 return (unsigned char) buf[0];
4944 #undef PerlIO_ungetc
4946 PerlIO_ungetc(PerlIO *f, int ch)
4951 if (PerlIO_unread(f, &buf, 1) == 1)
4959 PerlIO_putc(PerlIO *f, int ch)
4963 return PerlIO_write(f, &buf, 1);
4968 PerlIO_puts(PerlIO *f, const char *s)
4971 return PerlIO_write(f, s, strlen(s));
4974 #undef PerlIO_rewind
4976 PerlIO_rewind(PerlIO *f)
4979 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4983 #undef PerlIO_vprintf
4985 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4994 Perl_va_copy(ap, apc);
4995 sv = vnewSVpvf(fmt, &apc);
4998 sv = vnewSVpvf(fmt, &ap);
5000 s = SvPV_const(sv, len);
5001 wrote = PerlIO_write(f, s, len);
5006 #undef PerlIO_printf
5008 PerlIO_printf(PerlIO *f, const char *fmt, ...)
5013 result = PerlIO_vprintf(f, fmt, ap);
5018 #undef PerlIO_stdoutf
5020 PerlIO_stdoutf(const char *fmt, ...)
5026 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5031 #undef PerlIO_tmpfile
5033 PerlIO_tmpfile(void)
5040 const int fd = win32_tmpfd();
5042 f = PerlIO_fdopen(fd, "w+b");
5044 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5046 char tempname[] = "/tmp/PerlIO_XXXXXX";
5047 const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
5049 int old_umask = umask(0177);
5051 * I have no idea how portable mkstemp() is ... NI-S
5053 if (tmpdir && *tmpdir) {
5054 /* if TMPDIR is set and not empty, we try that first */
5055 sv = newSVpv(tmpdir, 0);
5056 sv_catpv(sv, tempname + 4);
5057 fd = mkstemp(SvPVX(sv));
5062 /* else we try /tmp */
5063 fd = mkstemp(tempname);
5068 sv_catpv(sv, tempname + 4);
5069 fd = mkstemp(SvPVX(sv));
5073 f = PerlIO_fdopen(fd, "w+");
5075 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5076 PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
5079 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5080 FILE * const stdio = PerlSIO_tmpfile();
5083 f = PerlIO_fdopen(fileno(stdio), "w+");
5085 # endif /* else HAS_MKSTEMP */
5086 #endif /* else WIN32 */
5091 Perl_PerlIO_save_errno(pTHX_ PerlIO *f)
5093 PERL_UNUSED_CONTEXT;
5094 if (!PerlIOValid(f))
5096 PerlIOBase(f)->err = errno;
5098 PerlIOBase(f)->os_err = vaxc$errno;
5100 PerlIOBase(f)->os_err = Perl_rc;
5101 #elif defined(WIN32)
5102 PerlIOBase(f)->os_err = GetLastError();
5107 Perl_PerlIO_restore_errno(pTHX_ PerlIO *f)
5109 PERL_UNUSED_CONTEXT;
5110 if (!PerlIOValid(f))
5112 SETERRNO(PerlIOBase(f)->err, PerlIOBase(f)->os_err);
5114 Perl_rc = PerlIOBase(f)->os_err);
5115 #elif defined(WIN32)
5116 SetLastError(PerlIOBase(f)->os_err);
5124 /*======================================================================================*/
5126 * Now some functions in terms of above which may be needed even if we are
5127 * not in true PerlIO mode
5130 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5132 const char *direction = NULL;
5135 * Need to supply default layer info from open.pm
5141 if (mode && mode[0] != 'r') {
5142 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
5143 direction = "open>";
5145 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
5146 direction = "open<";
5151 layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
5154 return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;
5159 #undef PerlIO_setpos
5161 PerlIO_setpos(PerlIO *f, SV *pos)
5167 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5168 if(len == sizeof(Off_t))
5169 return PerlIO_seek(f, *posn, SEEK_SET);
5172 SETERRNO(EINVAL, SS_IVCHAN);
5176 #undef PerlIO_setpos
5178 PerlIO_setpos(PerlIO *f, SV *pos)
5184 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5185 if(len == sizeof(Fpos_t))
5186 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5187 return fsetpos64(f, fpos);
5189 return fsetpos(f, fpos);
5193 SETERRNO(EINVAL, SS_IVCHAN);
5199 #undef PerlIO_getpos
5201 PerlIO_getpos(PerlIO *f, SV *pos)
5204 Off_t posn = PerlIO_tell(f);
5205 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5206 return (posn == (Off_t) - 1) ? -1 : 0;
5209 #undef PerlIO_getpos
5211 PerlIO_getpos(PerlIO *f, SV *pos)
5216 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5217 code = fgetpos64(f, &fpos);
5219 code = fgetpos(f, &fpos);
5221 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5226 #if !defined(HAS_VPRINTF)
5229 vprintf(char *pat, char *args)
5231 _doprnt(pat, args, stdout);
5232 return 0; /* wrong, but perl doesn't use the return
5237 vfprintf(FILE *fd, char *pat, char *args)
5239 _doprnt(pat, args, fd);
5240 return 0; /* wrong, but perl doesn't use the return
5246 /* print a failure format string message to stderr and fail exit the process
5247 using only libc without depending on any perl data structures being
5252 Perl_noperl_die(const char* pat, ...)
5255 PERL_ARGS_ASSERT_NOPERL_DIE;
5256 va_start(arglist, pat);
5257 vfprintf(stderr, pat, arglist);
5263 * ex: set ts=8 sts=4 sw=4 et: