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, ...)
358 if (!PL_perlio_debug_fd) {
360 PerlProc_getuid() == PerlProc_geteuid() &&
361 PerlProc_getgid() == PerlProc_getegid()) {
362 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
365 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
367 PL_perlio_debug_fd = PerlLIO_dup(2); /* stderr */
369 /* tainting or set*id, so ignore the environment and send the
370 debug output to stderr, like other -D switches. */
371 PL_perlio_debug_fd = PerlLIO_dup(2); /* stderr */
374 if (PL_perlio_debug_fd > 0) {
376 const char * const s = CopFILE(PL_curcop);
377 /* Use fixed buffer as sv_catpvf etc. needs SVs */
379 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
380 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
381 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2));
383 const char *s = CopFILE(PL_curcop);
385 SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
386 (IV) CopLINE(PL_curcop));
387 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
389 s = SvPV_const(sv, len);
390 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, s, len));
397 /*--------------------------------------------------------------------------------------*/
400 * Inner level routines
403 /* check that the head field of each layer points back to the head */
406 # define VERIFY_HEAD(f) PerlIO_verify_head(aTHX_ f)
408 PerlIO_verify_head(pTHX_ PerlIO *f)
412 #ifndef PERL_IMPLICIT_SYS
417 p = head = PerlIOBase(f)->head;
420 assert(p->head == head);
421 if (p == (PerlIOl*)f)
428 # define VERIFY_HEAD(f)
433 * Table of pointers to the PerlIO structs (malloc'ed)
435 #define PERLIO_TABLE_SIZE 64
438 PerlIO_init_table(pTHX)
442 Newxz(PL_perlio, PERLIO_TABLE_SIZE, PerlIOl);
448 PerlIO_allocate(pTHX)
451 * Find a free slot in the table, allocating new table as necessary
456 while ((f = *last)) {
458 last = (PerlIOl **) (f);
459 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
460 if (!((++f)->next)) {
465 Newxz(f,PERLIO_TABLE_SIZE,PerlIOl);
469 *last = (PerlIOl*) f++;
472 f->flags = 0; /* lockcnt */
478 #undef PerlIO_fdupopen
480 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
482 if (PerlIOValid(f)) {
483 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
484 DEBUG_i( PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param) );
486 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
488 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
492 SETERRNO(EBADF, SS_IVCHAN);
498 PerlIO_cleantable(pTHX_ PerlIOl **tablep)
500 PerlIOl * const table = *tablep;
503 PerlIO_cleantable(aTHX_(PerlIOl **) & (table[0]));
504 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
505 PerlIOl * const f = table + i;
507 PerlIO_close(&(f->next));
517 PerlIO_list_alloc(pTHX)
521 Newxz(list, 1, PerlIO_list_t);
527 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
530 if (--list->refcnt == 0) {
533 for (i = 0; i < list->cur; i++)
534 SvREFCNT_dec(list->array[i].arg);
535 Safefree(list->array);
543 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
548 if (list->cur >= list->len) {
551 Renew(list->array, list->len, PerlIO_pair_t);
553 Newx(list->array, list->len, PerlIO_pair_t);
555 p = &(list->array[list->cur++]);
557 if ((p->arg = arg)) {
558 SvREFCNT_inc_simple_void_NN(arg);
563 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
565 PerlIO_list_t *list = NULL;
568 list = PerlIO_list_alloc(aTHX);
569 for (i=0; i < proto->cur; i++) {
570 SV *arg = proto->array[i].arg;
573 arg = sv_dup(arg, param);
575 PERL_UNUSED_ARG(param);
577 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
584 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
587 PerlIOl **table = &proto->Iperlio;
590 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
591 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
592 PerlIO_init_table(aTHX);
593 DEBUG_i( PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto) );
594 while ((f = *table)) {
596 table = (PerlIOl **) (f++);
597 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
599 (void) fp_dup(&(f->next), 0, param);
606 PERL_UNUSED_ARG(proto);
607 PERL_UNUSED_ARG(param);
612 PerlIO_destruct(pTHX)
614 PerlIOl **table = &PL_perlio;
617 DEBUG_i( PerlIO_debug("Destruct %p\n",(void*)aTHX) );
619 while ((f = *table)) {
621 table = (PerlIOl **) (f++);
622 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
623 PerlIO *x = &(f->next);
626 if (l->tab && l->tab->kind & PERLIO_K_DESTRUCT) {
627 DEBUG_i( PerlIO_debug("Destruct popping %s\n", l->tab->name) );
641 PerlIO_pop(pTHX_ PerlIO *f)
643 const PerlIOl *l = *f;
646 DEBUG_i( PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f,
647 l->tab ? l->tab->name : "(Null)") );
648 if (l->tab && l->tab->Popped) {
650 * If popped returns non-zero do not free its layer structure
651 * it has either done so itself, or it is shared and still in
654 if ((*l->tab->Popped) (aTHX_ f) != 0)
657 if (PerlIO_lockcnt(f)) {
658 /* we're in use; defer freeing the structure */
659 PerlIOBase(f)->flags = PERLIO_F_CLEARED;
660 PerlIOBase(f)->tab = NULL;
670 /* Return as an array the stack of layers on a filehandle. Note that
671 * the stack is returned top-first in the array, and there are three
672 * times as many array elements as there are layers in the stack: the
673 * first element of a layer triplet is the name, the second one is the
674 * arguments, and the third one is the flags. */
677 PerlIO_get_layers(pTHX_ PerlIO *f)
679 AV * const av = newAV();
681 if (PerlIOValid(f)) {
682 PerlIOl *l = PerlIOBase(f);
685 /* There is some collusion in the implementation of
686 XS_PerlIO_get_layers - it knows that name and flags are
687 generated as fresh SVs here, and takes advantage of that to
688 "copy" them by taking a reference. If it changes here, it needs
689 to change there too. */
690 SV * const name = l->tab && l->tab->name ?
691 newSVpv(l->tab->name, 0) : &PL_sv_undef;
692 SV * const arg = l->tab && l->tab->Getarg ?
693 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
696 av_push(av, newSViv((IV)l->flags));
704 /*--------------------------------------------------------------------------------------*/
706 * XS Interface for perl code
710 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
714 if ((SSize_t) len <= 0)
716 for (i = 0; i < PL_known_layers->cur; i++) {
717 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
718 const STRLEN this_len = strlen(f->name);
719 if (this_len == len && memEQ(f->name, name, len)) {
720 DEBUG_i( PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f) );
724 if (load && PL_subname && PL_def_layerlist
725 && PL_def_layerlist->cur >= 2) {
726 if (PL_in_load_module) {
727 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
730 SV * const pkgsv = newSVpvs("PerlIO");
731 SV * const layer = newSVpvn(name, len);
732 CV * const cv = get_cvs("PerlIO::Layer::NoWarnings", 0);
734 SAVEBOOL(PL_in_load_module);
736 SAVEGENERICSV(PL_warnhook);
737 PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
739 PL_in_load_module = TRUE;
741 * The two SVs are magically freed by load_module
743 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
745 return PerlIO_find_layer(aTHX_ name, len, 0);
748 DEBUG_i( PerlIO_debug("Cannot find %.*s\n", (int) len, name) );
752 #ifdef USE_ATTRIBUTES_FOR_PERLIO
755 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
758 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
759 PerlIO * const ifp = IoIFP(io);
760 PerlIO * const ofp = IoOFP(io);
761 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
762 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
768 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
771 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
772 PerlIO * const ifp = IoIFP(io);
773 PerlIO * const ofp = IoOFP(io);
774 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
775 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
781 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
783 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
788 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
790 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
794 MGVTBL perlio_vtab = {
802 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
803 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
806 SV * const sv = SvRV(ST(1));
807 AV * const av = newAV();
811 sv_magic(sv, MUTABLE_SV(av), PERL_MAGIC_ext, NULL, 0);
813 mg = mg_find(sv, PERL_MAGIC_ext);
814 mg->mg_virtual = &perlio_vtab;
816 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
817 for (i = 2; i < items; i++) {
819 const char * const name = SvPV_const(ST(i), len);
820 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
822 av_push(av, SvREFCNT_inc_simple_NN(layer));
833 #endif /* USE_ATTRIBUTES_FOR_PERLIO */
836 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
838 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
839 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
843 XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
844 XS(XS_PerlIO__Layer__NoWarnings)
846 /* This is used as a %SIG{__WARN__} handler to suppress warnings
847 during loading of layers.
853 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0))) );
857 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
858 XS(XS_PerlIO__Layer__find)
863 Perl_croak(aTHX_ "Usage class->find(name[,load])");
866 const char * const name = SvPV_const(ST(1), len);
867 const bool load = (items > 2) ? SvTRUE_NN(ST(2)) : 0;
868 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
870 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
877 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
879 if (!PL_known_layers)
880 PL_known_layers = PerlIO_list_alloc(aTHX);
881 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
882 DEBUG_i( PerlIO_debug("define %s %p\n", tab->name, (void*)tab) );
886 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
889 const char *s = names;
891 while (isSPACE(*s) || *s == ':')
896 const char *as = NULL;
898 if (!isIDFIRST(*s)) {
900 * Message is consistent with how attribute lists are
901 * passed. Even though this means "foo : : bar" is
902 * seen as an invalid separator character.
904 const char q = ((*s == '\'') ? '"' : '\'');
905 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
906 "Invalid separator character %c%c%c in PerlIO layer specification %s",
908 SETERRNO(EINVAL, LIB_INVARG);
913 } while (isWORDCHAR(*e));
929 * It's a nul terminated string, not allowed
930 * to \ the terminating null. Anything other
931 * character is passed over.
941 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
942 "Argument list not closed for PerlIO layer \"%.*s\"",
954 PerlIO_funcs * const layer =
955 PerlIO_find_layer(aTHX_ s, llen, 1);
959 arg = newSVpvn(as, alen);
960 PerlIO_list_push(aTHX_ av, layer,
961 (arg) ? arg : &PL_sv_undef);
965 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
978 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
980 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
981 #ifdef PERLIO_USING_CRLF
984 if (PerlIO_stdio.Set_ptrcnt)
987 DEBUG_i( PerlIO_debug("Pushing %s\n", tab->name) );
988 PerlIO_list_push(aTHX_ av, (PerlIO_funcs *)tab, &PL_sv_undef);
992 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
994 return av->array[n].arg;
998 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1000 if (n >= 0 && n < av->cur) {
1001 DEBUG_i( PerlIO_debug("Layer %" IVdf " is %s\n", n,
1002 av->array[n].funcs->name) );
1003 return av->array[n].funcs;
1006 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1011 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1013 PERL_UNUSED_ARG(mode);
1014 PERL_UNUSED_ARG(arg);
1015 PERL_UNUSED_ARG(tab);
1016 if (PerlIOValid(f)) {
1018 PerlIO_pop(aTHX_ f);
1024 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1025 sizeof(PerlIO_funcs),
1028 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1048 NULL, /* get_base */
1049 NULL, /* get_bufsiz */
1052 NULL, /* set_ptrcnt */
1056 PerlIO_default_layers(pTHX)
1058 if (!PL_def_layerlist) {
1059 const char * const s = TAINTING_get ? NULL : PerlEnv_getenv("PERLIO");
1060 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1061 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1062 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1064 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1066 osLayer = &PerlIO_win32;
1069 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1070 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1071 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1072 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1073 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1074 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1075 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1076 PerlIO_list_push(aTHX_ PL_def_layerlist, (PerlIO_funcs *)osLayer,
1079 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1082 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1085 if (PL_def_layerlist->cur < 2) {
1086 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1088 return PL_def_layerlist;
1092 Perl_boot_core_PerlIO(pTHX)
1094 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1095 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1098 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1099 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1103 PerlIO_default_layer(pTHX_ I32 n)
1105 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1108 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1111 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1112 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1115 PerlIO_stdstreams(pTHX)
1118 PerlIO_init_table(aTHX);
1119 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1120 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1121 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1126 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1129 if (tab->fsize != sizeof(PerlIO_funcs)) {
1131 "%s (%"UVuf") does not match %s (%"UVuf")",
1132 "PerlIO layer function table size", (UV)tab->fsize,
1133 "size expected by this perl", (UV)sizeof(PerlIO_funcs) );
1137 if (tab->size < sizeof(PerlIOl)) {
1139 "%s (%"UVuf") smaller than %s (%"UVuf")",
1140 "PerlIO layer instance size", (UV)tab->size,
1141 "size expected by this perl", (UV)sizeof(PerlIOl) );
1143 /* Real layer with a data area */
1146 Newxz(temp, tab->size, char);
1150 l->tab = (PerlIO_funcs*) tab;
1151 l->head = ((PerlIOl*)f)->head;
1153 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1154 (void*)f, tab->name,
1155 (mode) ? mode : "(Null)", (void*)arg) );
1156 if (*l->tab->Pushed &&
1158 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1159 PerlIO_pop(aTHX_ f);
1168 /* Pseudo-layer where push does its own stack adjust */
1169 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1170 (mode) ? mode : "(Null)", (void*)arg) );
1172 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1180 PerlIOBase_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1181 IV n, const char *mode, int fd, int imode, int perm,
1182 PerlIO *old, int narg, SV **args)
1184 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_layer(aTHX_ 0));
1185 if (tab && tab->Open) {
1186 PerlIO* ret = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm, old, narg, args);
1187 if (ret && PerlIO_push(aTHX_ ret, self, mode, PerlIOArg) == NULL) {
1193 SETERRNO(EINVAL, LIB_INVARG);
1198 PerlIOBase_binmode(pTHX_ PerlIO *f)
1200 if (PerlIOValid(f)) {
1201 /* Is layer suitable for raw stream ? */
1202 if (PerlIOBase(f)->tab && PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1203 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1204 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1207 /* Not suitable - pop it */
1208 PerlIO_pop(aTHX_ f);
1216 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1218 PERL_UNUSED_ARG(mode);
1219 PERL_UNUSED_ARG(arg);
1220 PERL_UNUSED_ARG(tab);
1222 if (PerlIOValid(f)) {
1227 * Strip all layers that are not suitable for a raw stream
1230 while (t && (l = *t)) {
1231 if (l->tab && l->tab->Binmode) {
1232 /* Has a handler - normal case */
1233 if ((*l->tab->Binmode)(aTHX_ t) == 0) {
1235 /* Layer still there - move down a layer */
1244 /* No handler - pop it */
1245 PerlIO_pop(aTHX_ t);
1248 if (PerlIOValid(f)) {
1249 DEBUG_i( PerlIO_debug(":raw f=%p :%s\n", (void*)f,
1250 PerlIOBase(f)->tab ? PerlIOBase(f)->tab->name : "(Null)") );
1258 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1259 PerlIO_list_t *layers, IV n, IV max)
1263 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1265 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1276 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1280 save_scalar(PL_errgv);
1282 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1283 code = PerlIO_parse_layers(aTHX_ layers, names);
1285 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1287 PerlIO_list_free(aTHX_ layers);
1294 /*--------------------------------------------------------------------------------------*/
1296 * Given the abstraction above the public API functions
1300 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1303 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1304 (PerlIOBase(f) && PerlIOBase(f)->tab) ?
1305 PerlIOBase(f)->tab->name : "(Null)",
1306 iotype, mode, (names) ? names : "(Null)") );
1309 /* Do not flush etc. if (e.g.) switching encodings.
1310 if a pushed layer knows it needs to flush lower layers
1311 (for example :unix which is never going to call them)
1312 it can do the flush when it is pushed.
1314 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1317 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1318 #ifdef PERLIO_USING_CRLF
1319 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1320 O_BINARY so we can look for it in mode.
1322 if (!(mode & O_BINARY)) {
1324 /* FIXME?: Looking down the layer stack seems wrong,
1325 but is a way of reaching past (say) an encoding layer
1326 to flip CRLF-ness of the layer(s) below
1329 /* Perhaps we should turn on bottom-most aware layer
1330 e.g. Ilya's idea that UNIX TTY could serve
1332 if (PerlIOBase(f)->tab &&
1333 PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF)
1335 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1336 /* Not in text mode - flush any pending stuff and flip it */
1338 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1340 /* Only need to turn it on in one layer so we are done */
1345 /* Not finding a CRLF aware layer presumably means we are binary
1346 which is not what was requested - so we failed
1347 We _could_ push :crlf layer but so could caller
1352 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1353 So code that used to be here is now in PerlIORaw_pushed().
1355 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1360 PerlIO__close(pTHX_ PerlIO *f)
1362 if (PerlIOValid(f)) {
1363 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1364 if (tab && tab->Close)
1365 return (*tab->Close)(aTHX_ f);
1367 return PerlIOBase_close(aTHX_ f);
1370 SETERRNO(EBADF, SS_IVCHAN);
1376 Perl_PerlIO_close(pTHX_ PerlIO *f)
1378 const int code = PerlIO__close(aTHX_ f);
1379 while (PerlIOValid(f)) {
1380 PerlIO_pop(aTHX_ f);
1381 if (PerlIO_lockcnt(f))
1382 /* we're in use; the 'pop' deferred freeing the structure */
1389 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1391 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1395 static PerlIO_funcs *
1396 PerlIO_layer_from_ref(pTHX_ SV *sv)
1399 * For any scalar type load the handler which is bundled with perl
1401 if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
1402 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1403 /* This isn't supposed to happen, since PerlIO::scalar is core,
1404 * but could happen anyway in smaller installs or with PAR */
1406 /* diag_listed_as: Unknown PerlIO layer "%s" */
1407 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1412 * For other types allow if layer is known but don't try and load it
1414 switch (SvTYPE(sv)) {
1416 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1418 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1420 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1422 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1429 PerlIO_resolve_layers(pTHX_ const char *layers,
1430 const char *mode, int narg, SV **args)
1432 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1435 PerlIO_stdstreams(aTHX);
1437 SV * const arg = *args;
1439 * If it is a reference but not an object see if we have a handler
1442 if (SvROK(arg) && !SvOBJECT(SvRV(arg))) {
1443 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1445 def = PerlIO_list_alloc(aTHX);
1446 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1450 * Don't fail if handler cannot be found :via(...) etc. may do
1451 * something sensible else we will just stringfy and open
1456 if (!layers || !*layers)
1457 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1458 if (layers && *layers) {
1461 av = PerlIO_clone_list(aTHX_ def, NULL);
1466 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1470 PerlIO_list_free(aTHX_ av);
1482 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1483 int imode, int perm, PerlIO *f, int narg, SV **args)
1485 if (!f && narg == 1 && *args == &PL_sv_undef) {
1486 if ((f = PerlIO_tmpfile())) {
1487 if (!layers || !*layers)
1488 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1489 if (layers && *layers)
1490 PerlIO_apply_layers(aTHX_ f, mode, layers);
1494 PerlIO_list_t *layera;
1496 PerlIO_funcs *tab = NULL;
1497 if (PerlIOValid(f)) {
1499 * This is "reopen" - it is not tested as perl does not use it
1503 layera = PerlIO_list_alloc(aTHX);
1506 if (l->tab && l->tab->Getarg)
1507 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1508 PerlIO_list_push(aTHX_ layera, l->tab,
1509 (arg) ? arg : &PL_sv_undef);
1511 l = *PerlIONext(&l);
1515 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1521 * Start at "top" of layer stack
1523 n = layera->cur - 1;
1525 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1534 * Found that layer 'n' can do opens - call it
1536 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1537 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1539 DEBUG_i( PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1540 tab->name, layers ? layers : "(Null)", mode, fd,
1541 imode, perm, (void*)f, narg, (void*)args) );
1543 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1546 SETERRNO(EINVAL, LIB_INVARG);
1550 if (n + 1 < layera->cur) {
1552 * More layers above the one that we used to open -
1555 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1556 /* If pushing layers fails close the file */
1563 PerlIO_list_free(aTHX_ layera);
1570 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1572 PERL_ARGS_ASSERT_PERLIO_READ;
1574 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1578 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1580 PERL_ARGS_ASSERT_PERLIO_UNREAD;
1582 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1586 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1588 PERL_ARGS_ASSERT_PERLIO_WRITE;
1590 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1594 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1596 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1600 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1602 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1606 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1610 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1612 if (tab && tab->Flush)
1613 return (*tab->Flush) (aTHX_ f);
1615 return 0; /* If no Flush defined, silently succeed. */
1618 DEBUG_i( PerlIO_debug("Cannot flush f=%p\n", (void*)f) );
1619 SETERRNO(EBADF, SS_IVCHAN);
1625 * Is it good API design to do flush-all on NULL, a potentially
1626 * erroneous input? Maybe some magical value (PerlIO*
1627 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1628 * things on fflush(NULL), but should we be bound by their design
1631 PerlIOl **table = &PL_perlio;
1634 while ((ff = *table)) {
1636 table = (PerlIOl **) (ff++);
1637 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1638 if (ff->next && PerlIO_flush(&(ff->next)) != 0)
1648 PerlIOBase_flush_linebuf(pTHX)
1650 PerlIOl **table = &PL_perlio;
1652 while ((f = *table)) {
1654 table = (PerlIOl **) (f++);
1655 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1657 && (PerlIOBase(&(f->next))->
1658 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1659 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1660 PerlIO_flush(&(f->next));
1667 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1669 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1673 PerlIO_isutf8(PerlIO *f)
1676 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1678 SETERRNO(EBADF, SS_IVCHAN);
1684 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1686 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1690 Perl_PerlIO_error(pTHX_ PerlIO *f)
1692 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1696 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1698 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1702 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1704 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1708 PerlIO_has_base(PerlIO *f)
1710 if (PerlIOValid(f)) {
1711 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1714 return (tab->Get_base != NULL);
1721 PerlIO_fast_gets(PerlIO *f)
1723 if (PerlIOValid(f)) {
1724 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
1725 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1728 return (tab->Set_ptrcnt != NULL);
1736 PerlIO_has_cntptr(PerlIO *f)
1738 if (PerlIOValid(f)) {
1739 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1742 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1749 PerlIO_canset_cnt(PerlIO *f)
1751 if (PerlIOValid(f)) {
1752 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1755 return (tab->Set_ptrcnt != NULL);
1762 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1764 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1768 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1770 /* Note that Get_bufsiz returns a Size_t */
1771 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1775 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1777 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1781 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1783 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1787 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, SSize_t cnt)
1789 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1793 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
1795 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1799 /*--------------------------------------------------------------------------------------*/
1801 * utf8 and raw dummy layers
1805 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1807 PERL_UNUSED_CONTEXT;
1808 PERL_UNUSED_ARG(mode);
1809 PERL_UNUSED_ARG(arg);
1810 if (PerlIOValid(f)) {
1811 if (tab && tab->kind & PERLIO_K_UTF8)
1812 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1814 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1820 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1821 sizeof(PerlIO_funcs),
1824 PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
1844 NULL, /* get_base */
1845 NULL, /* get_bufsiz */
1848 NULL, /* set_ptrcnt */
1851 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1852 sizeof(PerlIO_funcs),
1855 PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
1875 NULL, /* get_base */
1876 NULL, /* get_bufsiz */
1879 NULL, /* set_ptrcnt */
1882 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1883 sizeof(PerlIO_funcs),
1906 NULL, /* get_base */
1907 NULL, /* get_bufsiz */
1910 NULL, /* set_ptrcnt */
1912 /*--------------------------------------------------------------------------------------*/
1913 /*--------------------------------------------------------------------------------------*/
1915 * "Methods" of the "base class"
1919 PerlIOBase_fileno(pTHX_ PerlIO *f)
1921 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1925 PerlIO_modestr(PerlIO * f, char *buf)
1928 if (PerlIOValid(f)) {
1929 const IV flags = PerlIOBase(f)->flags;
1930 if (flags & PERLIO_F_APPEND) {
1932 if (flags & PERLIO_F_CANREAD) {
1936 else if (flags & PERLIO_F_CANREAD) {
1938 if (flags & PERLIO_F_CANWRITE)
1941 else if (flags & PERLIO_F_CANWRITE) {
1943 if (flags & PERLIO_F_CANREAD) {
1947 #ifdef PERLIO_USING_CRLF
1948 if (!(flags & PERLIO_F_CRLF))
1958 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1960 PerlIOl * const l = PerlIOBase(f);
1961 PERL_UNUSED_CONTEXT;
1962 PERL_UNUSED_ARG(arg);
1964 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1965 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1966 if (tab && tab->Set_ptrcnt != NULL)
1967 l->flags |= PERLIO_F_FASTGETS;
1969 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
1973 l->flags |= PERLIO_F_CANREAD;
1976 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1979 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1982 SETERRNO(EINVAL, LIB_INVARG);
1988 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1991 l->flags &= ~PERLIO_F_CRLF;
1994 l->flags |= PERLIO_F_CRLF;
1997 SETERRNO(EINVAL, LIB_INVARG);
2004 l->flags |= l->next->flags &
2005 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2011 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2012 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2013 l->flags, PerlIO_modestr(f, temp));
2020 PerlIOBase_popped(pTHX_ PerlIO *f)
2022 PERL_UNUSED_CONTEXT;
2028 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2031 * Save the position as current head considers it
2033 const Off_t old = PerlIO_tell(f);
2034 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2035 PerlIOSelf(f, PerlIOBuf)->posn = old;
2036 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2040 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2042 STDCHAR *buf = (STDCHAR *) vbuf;
2044 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2045 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2046 SETERRNO(EBADF, SS_IVCHAN);
2047 PerlIO_save_errno(f);
2053 SSize_t avail = PerlIO_get_cnt(f);
2056 take = (((SSize_t) count >= 0) && ((SSize_t)count < avail)) ? (SSize_t)count : avail;
2058 STDCHAR *ptr = PerlIO_get_ptr(f);
2059 Copy(ptr, buf, take, STDCHAR);
2060 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2063 if (avail == 0) /* set_ptrcnt could have reset avail */
2066 if (count > 0 && avail <= 0) {
2067 if (PerlIO_fill(f) != 0)
2072 return (buf - (STDCHAR *) vbuf);
2078 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2080 PERL_UNUSED_CONTEXT;
2086 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2088 PERL_UNUSED_CONTEXT;
2094 PerlIOBase_close(pTHX_ PerlIO *f)
2097 if (PerlIOValid(f)) {
2098 PerlIO *n = PerlIONext(f);
2099 code = PerlIO_flush(f);
2100 PerlIOBase(f)->flags &=
2101 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2102 while (PerlIOValid(n)) {
2103 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2104 if (tab && tab->Close) {
2105 if ((*tab->Close)(aTHX_ n) != 0)
2110 PerlIOBase(n)->flags &=
2111 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2117 SETERRNO(EBADF, SS_IVCHAN);
2123 PerlIOBase_eof(pTHX_ PerlIO *f)
2125 PERL_UNUSED_CONTEXT;
2126 if (PerlIOValid(f)) {
2127 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2133 PerlIOBase_error(pTHX_ PerlIO *f)
2135 PERL_UNUSED_CONTEXT;
2136 if (PerlIOValid(f)) {
2137 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2143 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2145 if (PerlIOValid(f)) {
2146 PerlIO * const n = PerlIONext(f);
2147 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2154 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2156 PERL_UNUSED_CONTEXT;
2157 if (PerlIOValid(f)) {
2158 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2163 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2169 arg = sv_dup(arg, param);
2170 SvREFCNT_inc_simple_void_NN(arg);
2174 return newSVsv(arg);
2177 PERL_UNUSED_ARG(param);
2178 return newSVsv(arg);
2183 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2185 PerlIO * const nexto = PerlIONext(o);
2186 if (PerlIOValid(nexto)) {
2187 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2188 if (tab && tab->Dup)
2189 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2191 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2194 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2198 DEBUG_i(PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2200 (void*)f, (void*)o, (void*)param) );
2202 arg = (*self->Getarg)(aTHX_ o, param, flags);
2203 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2204 if (f && PerlIOBase(o)->flags & PERLIO_F_UTF8)
2205 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
2211 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2213 /* Must be called with PL_perlio_mutex locked. */
2215 S_more_refcounted_fds(pTHX_ const int new_fd)
2216 PERL_TSA_REQUIRES(PL_perlio_mutex)
2219 const int old_max = PL_perlio_fd_refcnt_size;
2220 const int new_max = 16 + (new_fd & ~15);
2223 #ifndef PERL_IMPLICIT_SYS
2224 PERL_UNUSED_CONTEXT;
2227 DEBUG_i( PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2228 old_max, new_fd, new_max) );
2230 if (new_fd < old_max) {
2234 assert (new_max > new_fd);
2236 /* Use plain realloc() since we need this memory to be really
2237 * global and visible to all the interpreters and/or threads. */
2238 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2242 MUTEX_UNLOCK(&PL_perlio_mutex);
2247 PL_perlio_fd_refcnt_size = new_max;
2248 PL_perlio_fd_refcnt = new_array;
2250 DEBUG_i( PerlIO_debug("Zeroing %p, %d\n",
2251 (void*)(new_array + old_max),
2252 new_max - old_max) );
2254 Zero(new_array + old_max, new_max - old_max, int);
2261 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2262 PERL_UNUSED_CONTEXT;
2266 PerlIOUnix_refcnt_inc(int fd)
2273 MUTEX_LOCK(&PL_perlio_mutex);
2275 if (fd >= PL_perlio_fd_refcnt_size)
2276 S_more_refcounted_fds(aTHX_ fd);
2278 PL_perlio_fd_refcnt[fd]++;
2279 if (PL_perlio_fd_refcnt[fd] <= 0) {
2280 /* diag_listed_as: refcnt_inc: fd %d%s */
2281 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2282 fd, PL_perlio_fd_refcnt[fd]);
2284 DEBUG_i( PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2285 fd, PL_perlio_fd_refcnt[fd]) );
2288 MUTEX_UNLOCK(&PL_perlio_mutex);
2291 /* diag_listed_as: refcnt_inc: fd %d%s */
2292 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2297 PerlIOUnix_refcnt_dec(int fd)
2307 MUTEX_LOCK(&PL_perlio_mutex);
2309 if (fd >= PL_perlio_fd_refcnt_size) {
2310 /* diag_listed_as: refcnt_dec: fd %d%s */
2311 Perl_croak_nocontext("refcnt_dec: fd %d >= refcnt_size %d\n",
2312 fd, PL_perlio_fd_refcnt_size);
2314 if (PL_perlio_fd_refcnt[fd] <= 0) {
2315 /* diag_listed_as: refcnt_dec: fd %d%s */
2316 Perl_croak_nocontext("refcnt_dec: fd %d: %d <= 0\n",
2317 fd, PL_perlio_fd_refcnt[fd]);
2319 cnt = --PL_perlio_fd_refcnt[fd];
2320 DEBUG_i( PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt) );
2322 MUTEX_UNLOCK(&PL_perlio_mutex);
2325 /* diag_listed_as: refcnt_dec: fd %d%s */
2326 Perl_croak_nocontext("refcnt_dec: fd %d < 0\n", fd);
2332 PerlIOUnix_refcnt(int fd)
2339 MUTEX_LOCK(&PL_perlio_mutex);
2341 if (fd >= PL_perlio_fd_refcnt_size) {
2342 /* diag_listed_as: refcnt: fd %d%s */
2343 Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
2344 fd, PL_perlio_fd_refcnt_size);
2346 if (PL_perlio_fd_refcnt[fd] <= 0) {
2347 /* diag_listed_as: refcnt: fd %d%s */
2348 Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
2349 fd, PL_perlio_fd_refcnt[fd]);
2351 cnt = PL_perlio_fd_refcnt[fd];
2353 MUTEX_UNLOCK(&PL_perlio_mutex);
2356 /* diag_listed_as: refcnt: fd %d%s */
2357 Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
2363 PerlIO_cleanup(pTHX)
2367 DEBUG_i( PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX) );
2369 DEBUG_i( PerlIO_debug("Cleanup layers\n") );
2372 /* Raise STDIN..STDERR refcount so we don't close them */
2373 for (i=0; i < 3; i++)
2374 PerlIOUnix_refcnt_inc(i);
2375 PerlIO_cleantable(aTHX_ &PL_perlio);
2376 /* Restore STDIN..STDERR refcount */
2377 for (i=0; i < 3; i++)
2378 PerlIOUnix_refcnt_dec(i);
2380 if (PL_known_layers) {
2381 PerlIO_list_free(aTHX_ PL_known_layers);
2382 PL_known_layers = NULL;
2384 if (PL_def_layerlist) {
2385 PerlIO_list_free(aTHX_ PL_def_layerlist);
2386 PL_def_layerlist = NULL;
2390 void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
2394 /* XXX we can't rely on an interpreter being present at this late stage,
2395 XXX so we can't use a function like PerlLIO_write that relies on one
2396 being present (at least in win32) :-(.
2401 /* By now all filehandles should have been closed, so any
2402 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2404 #define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
2405 #define PERLIO_TEARDOWN_MESSAGE_FD 2
2406 char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
2408 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2409 if (PL_perlio_fd_refcnt[i]) {
2411 my_snprintf(buf, sizeof(buf),
2412 "PerlIO_teardown: fd %d refcnt=%d\n",
2413 i, PL_perlio_fd_refcnt[i]);
2414 PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
2420 /* Not bothering with PL_perlio_mutex since by now
2421 * all the interpreters are gone. */
2422 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2423 && PL_perlio_fd_refcnt) {
2424 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2425 PL_perlio_fd_refcnt = NULL;
2426 PL_perlio_fd_refcnt_size = 0;
2430 /*--------------------------------------------------------------------------------------*/
2432 * Bottom-most level for UNIX-like case
2436 struct _PerlIO base; /* The generic part */
2437 int fd; /* UNIX like file descriptor */
2438 int oflags; /* open/fcntl flags */
2442 S_lockcnt_dec(pTHX_ const void* f)
2444 #ifndef PERL_IMPLICIT_SYS
2445 PERL_UNUSED_CONTEXT;
2447 PerlIO_lockcnt((PerlIO*)f)--;
2451 /* call the signal handler, and if that handler happens to clear
2452 * this handle, free what we can and return true */
2455 S_perlio_async_run(pTHX_ PerlIO* f) {
2457 SAVEDESTRUCTOR_X(S_lockcnt_dec, (void*)f);
2458 PerlIO_lockcnt(f)++;
2460 if ( !(PerlIOBase(f)->flags & PERLIO_F_CLEARED) ) {
2464 /* we've just run some perl-level code that could have done
2465 * anything, including closing the file or clearing this layer.
2466 * If so, free any lower layers that have already been
2467 * cleared, then return an error. */
2468 while (PerlIOValid(f) &&
2469 (PerlIOBase(f)->flags & PERLIO_F_CLEARED))
2471 const PerlIOl *l = *f;
2480 PerlIOUnix_oflags(const char *mode)
2483 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2488 if (*++mode == '+') {
2495 oflags = O_CREAT | O_TRUNC;
2496 if (*++mode == '+') {
2505 oflags = O_CREAT | O_APPEND;
2506 if (*++mode == '+') {
2515 /* XXX TODO: PerlIO_open() test that exercises 'rb' and 'rt'. */
2517 /* Unless O_BINARY is different from O_TEXT, first bit-or:ing one
2518 * of them in, and then bit-and-masking the other them away, won't
2519 * have much of an effect. */
2522 #if O_TEXT != O_BINARY
2529 #if O_TEXT != O_BINARY
2531 oflags &= ~O_BINARY;
2537 /* bit-or:ing with zero O_BINARY would be useless. */
2539 * If neither "t" nor "b" was specified, open the file
2542 * Note that if something else than the zero byte was seen
2543 * here (e.g. bogus mode "rx"), just few lines later we will
2544 * set the errno and invalidate the flags.
2550 if (*mode || oflags == -1) {
2551 SETERRNO(EINVAL, LIB_INVARG);
2558 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2560 PERL_UNUSED_CONTEXT;
2561 return PerlIOSelf(f, PerlIOUnix)->fd;
2565 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2567 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2570 if (PerlLIO_fstat(fd, &st) == 0) {
2571 if (!S_ISREG(st.st_mode)) {
2572 DEBUG_i( PerlIO_debug("%d is not regular file\n",fd) );
2573 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2576 DEBUG_i( PerlIO_debug("%d _is_ a regular file\n",fd) );
2582 PerlIOUnix_refcnt_inc(fd);
2583 PERL_UNUSED_CONTEXT;
2587 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2589 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2590 if (*PerlIONext(f)) {
2591 /* We never call down so do any pending stuff now */
2592 PerlIO_flush(PerlIONext(f));
2594 * XXX could (or should) we retrieve the oflags from the open file
2595 * handle rather than believing the "mode" we are passed in? XXX
2596 * Should the value on NULL mode be 0 or -1?
2598 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2599 mode ? PerlIOUnix_oflags(mode) : -1);
2601 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2607 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2609 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2611 PERL_UNUSED_CONTEXT;
2612 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2614 SETERRNO(ESPIPE, LIB_INVARG);
2616 SETERRNO(EINVAL, LIB_INVARG);
2620 new_loc = PerlLIO_lseek(fd, offset, whence);
2621 if (new_loc == (Off_t) - 1)
2623 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2628 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2629 IV n, const char *mode, int fd, int imode,
2630 int perm, PerlIO *f, int narg, SV **args)
2632 if (PerlIOValid(f)) {
2633 if (PerlIOBase(f)->tab && PerlIOBase(f)->flags & PERLIO_F_OPEN)
2634 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2637 if (*mode == IoTYPE_NUMERIC)
2640 imode = PerlIOUnix_oflags(mode);
2642 perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
2649 const char *path = SvPV_const(*args, len);
2650 if (!IS_SAFE_PATHNAME(path, len, "open"))
2652 fd = PerlLIO_open3(path, imode, perm);
2656 if (*mode == IoTYPE_IMPLICIT)
2659 f = PerlIO_allocate(aTHX);
2661 if (!PerlIOValid(f)) {
2662 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2667 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2668 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2669 if (*mode == IoTYPE_APPEND)
2670 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2677 * FIXME: pop layers ???
2685 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2687 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2689 if (flags & PERLIO_DUP_FD) {
2690 fd = PerlLIO_dup(fd);
2693 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2695 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2696 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2706 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2709 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2711 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2712 #ifdef PERLIO_STD_SPECIAL
2714 return PERLIO_STD_IN(fd, vbuf, count);
2716 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2717 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2721 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2722 if (len >= 0 || errno != EINTR) {
2724 if (errno != EAGAIN) {
2725 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2726 PerlIO_save_errno(f);
2729 else if (len == 0 && count != 0) {
2730 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2736 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2739 NOT_REACHED; /*NOTREACHED*/
2743 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2746 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2748 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2749 #ifdef PERLIO_STD_SPECIAL
2750 if (fd == 1 || fd == 2)
2751 return PERLIO_STD_OUT(fd, vbuf, count);
2754 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2755 if (len >= 0 || errno != EINTR) {
2757 if (errno != EAGAIN) {
2758 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2759 PerlIO_save_errno(f);
2765 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2768 NOT_REACHED; /*NOTREACHED*/
2772 PerlIOUnix_tell(pTHX_ PerlIO *f)
2774 PERL_UNUSED_CONTEXT;
2776 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2781 PerlIOUnix_close(pTHX_ PerlIO *f)
2783 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2785 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2786 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2787 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2792 SETERRNO(EBADF,SS_IVCHAN);
2795 while (PerlLIO_close(fd) != 0) {
2796 if (errno != EINTR) {
2801 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2805 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2810 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2811 sizeof(PerlIO_funcs),
2818 PerlIOBase_binmode, /* binmode */
2828 PerlIOBase_noop_ok, /* flush */
2829 PerlIOBase_noop_fail, /* fill */
2832 PerlIOBase_clearerr,
2833 PerlIOBase_setlinebuf,
2834 NULL, /* get_base */
2835 NULL, /* get_bufsiz */
2838 NULL, /* set_ptrcnt */
2841 /*--------------------------------------------------------------------------------------*/
2846 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2847 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2848 broken by the last second glibc 2.3 fix
2850 #define STDIO_BUFFER_WRITABLE
2855 struct _PerlIO base;
2856 FILE *stdio; /* The stream */
2860 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2862 PERL_UNUSED_CONTEXT;
2864 if (PerlIOValid(f)) {
2865 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2867 return PerlSIO_fileno(s);
2874 PerlIOStdio_mode(const char *mode, char *tmode)
2876 char * const ret = tmode;
2882 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2890 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2893 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2894 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2895 if (toptab == tab) {
2896 /* Top is already stdio - pop self (duplicate) and use original */
2897 PerlIO_pop(aTHX_ f);
2900 const int fd = PerlIO_fileno(n);
2903 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2904 mode = PerlIOStdio_mode(mode, tmode)))) {
2905 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2906 /* We never call down so do any pending stuff now */
2907 PerlIO_flush(PerlIONext(f));
2908 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2915 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2920 PerlIO_importFILE(FILE *stdio, const char *mode)
2926 char filename[FILENAME_MAX];
2931 int fd0 = fileno(stdio);
2934 rc = fldata(stdio,filename,&fileinfo);
2938 if(fileinfo.__dsorgHFS){
2941 /*This MVS dataset , OK!*/
2946 if (!mode || !*mode) {
2947 /* We need to probe to see how we can open the stream
2948 so start with read/write and then try write and read
2949 we dup() so that we can fclose without loosing the fd.
2951 Note that the errno value set by a failing fdopen
2952 varies between stdio implementations.
2954 const int fd = PerlLIO_dup(fd0);
2959 f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2961 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2964 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2967 /* Don't seem to be able to open */
2973 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2974 s = PerlIOSelf(f, PerlIOStdio);
2977 fd0 = fileno(stdio);
2979 PerlIOUnix_refcnt_inc(fd0);
2982 rc = fldata(stdio,filename,&fileinfo);
2984 PerlIOUnix_refcnt_inc(fd0);
2986 if(fileinfo.__dsorgHFS){
2987 PerlIOUnix_refcnt_inc(fd0);
2989 /*This MVS dataset , OK!*/
2992 PerlIOUnix_refcnt_inc(fileno(stdio));
3000 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3001 IV n, const char *mode, int fd, int imode,
3002 int perm, PerlIO *f, int narg, SV **args)
3005 if (PerlIOValid(f)) {
3007 const char * const path = SvPV_const(*args, len);
3008 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
3010 if (!IS_SAFE_PATHNAME(path, len, "open"))
3012 PerlIOUnix_refcnt_dec(fileno(s->stdio));
3013 stdio = PerlSIO_freopen(path, PerlIOStdio_mode(mode, tmode),
3018 PerlIOUnix_refcnt_inc(fileno(s->stdio));
3024 const char * const path = SvPV_const(*args, len);
3025 if (!IS_SAFE_PATHNAME(path, len, "open"))
3027 if (*mode == IoTYPE_NUMERIC) {
3029 fd = PerlLIO_open3(path, imode, perm);
3033 bool appended = FALSE;
3035 /* Cygwin wants its 'b' early. */
3037 mode = PerlIOStdio_mode(mode, tmode);
3039 stdio = PerlSIO_fopen(path, mode);
3042 f = PerlIO_allocate(aTHX);
3045 mode = PerlIOStdio_mode(mode, tmode);
3046 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
3048 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3049 PerlIOUnix_refcnt_inc(fileno(stdio));
3051 PerlSIO_fclose(stdio);
3063 if (*mode == IoTYPE_IMPLICIT) {
3070 stdio = PerlSIO_stdin;
3073 stdio = PerlSIO_stdout;
3076 stdio = PerlSIO_stderr;
3081 stdio = PerlSIO_fdopen(fd, mode =
3082 PerlIOStdio_mode(mode, tmode));
3086 f = PerlIO_allocate(aTHX);
3088 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
3089 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3090 PerlIOUnix_refcnt_inc(fileno(stdio));
3101 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3103 /* This assumes no layers underneath - which is what
3104 happens, but is not how I remember it. NI-S 2001/10/16
3106 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
3107 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
3108 const int fd = fileno(stdio);
3110 if (flags & PERLIO_DUP_FD) {
3111 const int dfd = PerlLIO_dup(fileno(stdio));
3113 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
3118 /* FIXME: To avoid messy error recovery if dup fails
3119 re-use the existing stdio as though flag was not set
3123 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3125 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3127 PerlIOUnix_refcnt_inc(fileno(stdio));
3134 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3136 PERL_UNUSED_CONTEXT;
3138 /* XXX this could use PerlIO_canset_fileno() and
3139 * PerlIO_set_fileno() support from Configure
3141 # if defined(HAS_FDCLOSE)
3142 return fdclose(f, NULL) == 0 ? 1 : 0;
3143 # elif defined(__UCLIBC__)
3144 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3147 # elif defined(__GLIBC__)
3148 /* There may be a better way for GLIBC:
3149 - libio.h defines a flag to not close() on cleanup
3153 # elif defined(__sun)
3156 # elif defined(__hpux)
3160 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3161 your platform does not have special entry try this one.
3162 [For OSF only have confirmation for Tru64 (alpha)
3163 but assume other OSFs will be similar.]
3165 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3168 # elif defined(__FreeBSD__)
3169 /* There may be a better way on FreeBSD:
3170 - we could insert a dummy func in the _close function entry
3171 f->_close = (int (*)(void *)) dummy_close;
3175 # elif defined(__OpenBSD__)
3176 /* There may be a better way on OpenBSD:
3177 - we could insert a dummy func in the _close function entry
3178 f->_close = (int (*)(void *)) dummy_close;
3182 # elif defined(__EMX__)
3183 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3186 # elif defined(__CYGWIN__)
3187 /* There may be a better way on CYGWIN:
3188 - we could insert a dummy func in the _close function entry
3189 f->_close = (int (*)(void *)) dummy_close;
3193 # elif defined(WIN32)
3194 # if defined(UNDER_CE)
3195 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3204 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3205 (which isn't thread safe) instead
3207 # error "Don't know how to set FILE.fileno on your platform"
3215 PerlIOStdio_close(pTHX_ PerlIO *f)
3217 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3223 const int fd = fileno(stdio);
3231 #ifdef SOCKS5_VERSION_NAME
3232 /* Socks lib overrides close() but stdio isn't linked to
3233 that library (though we are) - so we must call close()
3234 on sockets on stdio's behalf.
3237 Sock_size_t optlen = sizeof(int);
3238 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3241 /* Test for -1, as *BSD stdio (at least) on fclose sets the FILE* such
3242 that a subsequent fileno() on it returns -1. Don't want to croak()
3243 from within PerlIOUnix_refcnt_dec() if some buggy caller code is
3244 trying to close an already closed handle which somehow it still has
3245 a reference to. (via.xs, I'm looking at you). */
3246 if (fd != -1 && PerlIOUnix_refcnt_dec(fd) > 0) {
3247 /* File descriptor still in use */
3251 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3252 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3254 if (stdio == stdout || stdio == stderr)
3255 return PerlIO_flush(f);
3258 MUTEX_LOCK(&PL_perlio_mutex);
3259 /* Right. We need a mutex here because for a brief while we
3260 will have the situation that fd is actually closed. Hence if
3261 a second thread were to get into this block, its dup() would
3262 likely return our fd as its dupfd. (after all, it is closed)
3263 Then if we get to the dup2() first, we blat the fd back
3264 (messing up its temporary as a side effect) only for it to
3265 then close its dupfd (== our fd) in its close(dupfd) */
3267 /* There is, of course, a race condition, that any other thread
3268 trying to input/output/whatever on this fd will be stuffed
3269 for the duration of this little manoeuvrer. Perhaps we
3270 should hold an IO mutex for the duration of every IO
3271 operation if we know that invalidate doesn't work on this
3272 platform, but that would suck, and could kill performance.
3274 Except that correctness trumps speed.
3275 Advice from klortho #11912. */
3278 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3279 Use Sarathy's trick from maint-5.6 to invalidate the
3280 fileno slot of the FILE *
3282 result = PerlIO_flush(f);
3284 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3286 dupfd = PerlLIO_dup(fd);
3289 /* Oh cXap. This isn't going to go well. Not sure if we can
3290 recover from here, or if closing this particular FILE *
3291 is a good idea now. */
3296 SAVE_ERRNO; /* This is here only to silence compiler warnings */
3298 result = PerlSIO_fclose(stdio);
3299 /* We treat error from stdio as success if we invalidated
3300 errno may NOT be expected EBADF
3302 if (invalidate && result != 0) {
3306 #ifdef SOCKS5_VERSION_NAME
3307 /* in SOCKS' case, let close() determine return value */
3311 PerlLIO_dup2(dupfd,fd);
3312 PerlLIO_close(dupfd);
3315 MUTEX_UNLOCK(&PL_perlio_mutex);
3322 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3326 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3328 s = PerlIOSelf(f, PerlIOStdio)->stdio;
3331 STDCHAR *buf = (STDCHAR *) vbuf;
3333 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3334 * stdio does not do that for fread()
3336 const int ch = PerlSIO_fgetc(s);
3343 got = PerlSIO_fread(vbuf, 1, count, s);
3344 if (got == 0 && PerlSIO_ferror(s))
3346 if (got >= 0 || errno != EINTR)
3348 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3350 SETERRNO(0,0); /* just in case */
3353 /* Under some circumstances IRIX stdio fgetc() and fread()
3354 * set the errno to ENOENT, which makes no sense according
3355 * to either IRIX or POSIX. [rt.perl.org #123977] */
3356 if (errno == ENOENT) SETERRNO(0,0);
3362 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3365 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3367 #ifdef STDIO_BUFFER_WRITABLE
3368 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3369 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3370 STDCHAR *base = PerlIO_get_base(f);
3371 SSize_t cnt = PerlIO_get_cnt(f);
3372 STDCHAR *ptr = PerlIO_get_ptr(f);
3373 SSize_t avail = ptr - base;
3375 if (avail > count) {
3379 Move(buf-avail,ptr,avail,STDCHAR);
3382 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3383 if (PerlSIO_feof(s) && unread >= 0)
3384 PerlSIO_clearerr(s);
3389 if (PerlIO_has_cntptr(f)) {
3390 /* We can get pointer to buffer but not its base
3391 Do ungetc() but check chars are ending up in the
3394 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3395 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3397 const int ch = *--buf & 0xFF;
3398 if (ungetc(ch,s) != ch) {
3399 /* ungetc did not work */
3402 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3403 /* Did not change pointer as expected */
3404 if (fgetc(s) != EOF) /* get char back again */
3414 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3420 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3423 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3426 got = PerlSIO_fwrite(vbuf, 1, count,
3427 PerlIOSelf(f, PerlIOStdio)->stdio);
3428 if (got >= 0 || errno != EINTR)
3430 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3432 SETERRNO(0,0); /* just in case */
3438 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3440 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3441 PERL_UNUSED_CONTEXT;
3443 return PerlSIO_fseek(stdio, offset, whence);
3447 PerlIOStdio_tell(pTHX_ PerlIO *f)
3449 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3450 PERL_UNUSED_CONTEXT;
3452 return PerlSIO_ftell(stdio);
3456 PerlIOStdio_flush(pTHX_ PerlIO *f)
3458 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3459 PERL_UNUSED_CONTEXT;
3461 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3462 return PerlSIO_fflush(stdio);
3468 * FIXME: This discards ungetc() and pre-read stuff which is not
3469 * right if this is just a "sync" from a layer above Suspect right
3470 * design is to do _this_ but not have layer above flush this
3471 * layer read-to-read
3474 * Not writeable - sync by attempting a seek
3477 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3485 PerlIOStdio_eof(pTHX_ PerlIO *f)
3487 PERL_UNUSED_CONTEXT;
3489 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3493 PerlIOStdio_error(pTHX_ PerlIO *f)
3495 PERL_UNUSED_CONTEXT;
3497 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3501 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3503 PERL_UNUSED_CONTEXT;
3505 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3509 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3511 PERL_UNUSED_CONTEXT;
3513 #ifdef HAS_SETLINEBUF
3514 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3516 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3522 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3524 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3525 return (STDCHAR*)PerlSIO_get_base(stdio);
3529 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3531 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3532 return PerlSIO_get_bufsiz(stdio);
3536 #ifdef USE_STDIO_PTR
3538 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3540 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3541 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3545 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3547 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3548 return PerlSIO_get_cnt(stdio);
3552 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3554 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3556 #ifdef STDIO_PTR_LVALUE
3557 /* This is a long-standing infamous mess. The root of the
3558 * problem is that one cannot know the signedness of char, and
3559 * more precisely the signedness of FILE._ptr. The following
3560 * things have been tried, and they have all failed (across
3561 * different compilers (remember that core needs to to build
3562 * also with c++) and compiler options:
3564 * - casting the RHS to (void*) -- works in *some* places
3565 * - casting the LHS to (void*) -- totally unportable
3567 * So let's try silencing the warning at least for gcc. */
3568 GCC_DIAG_IGNORE(-Wpointer-sign);
3569 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3571 #ifdef STDIO_PTR_LVAL_SETS_CNT
3572 assert(PerlSIO_get_cnt(stdio) == (cnt));
3574 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3576 * Setting ptr _does_ change cnt - we are done
3580 #else /* STDIO_PTR_LVALUE */
3582 #endif /* STDIO_PTR_LVALUE */
3585 * Now (or only) set cnt
3587 #ifdef STDIO_CNT_LVALUE
3588 PerlSIO_set_cnt(stdio, cnt);
3589 #else /* STDIO_CNT_LVALUE */
3590 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3591 PerlSIO_set_ptr(stdio,
3592 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3594 #else /* STDIO_PTR_LVAL_SETS_CNT */
3596 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3597 #endif /* STDIO_CNT_LVALUE */
3604 PerlIOStdio_fill(pTHX_ PerlIO *f)
3608 PERL_UNUSED_CONTEXT;
3609 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3611 stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3614 * fflush()ing read-only streams can cause trouble on some stdio-s
3616 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3617 if (PerlSIO_fflush(stdio) != 0)
3621 c = PerlSIO_fgetc(stdio);
3624 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3626 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3631 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3633 #ifdef STDIO_BUFFER_WRITABLE
3634 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3635 /* Fake ungetc() to the real buffer in case system's ungetc
3638 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3639 SSize_t cnt = PerlSIO_get_cnt(stdio);
3640 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3641 if (ptr == base+1) {
3642 *--ptr = (STDCHAR) c;
3643 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3644 if (PerlSIO_feof(stdio))
3645 PerlSIO_clearerr(stdio);
3651 if (PerlIO_has_cntptr(f)) {
3653 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3659 /* If buffer snoop scheme above fails fall back to
3662 if (PerlSIO_ungetc(c, stdio) != c)
3670 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3671 sizeof(PerlIO_funcs),
3673 sizeof(PerlIOStdio),
3674 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3678 PerlIOBase_binmode, /* binmode */
3692 PerlIOStdio_clearerr,
3693 PerlIOStdio_setlinebuf,
3695 PerlIOStdio_get_base,
3696 PerlIOStdio_get_bufsiz,
3701 #ifdef USE_STDIO_PTR
3702 PerlIOStdio_get_ptr,
3703 PerlIOStdio_get_cnt,
3704 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3705 PerlIOStdio_set_ptrcnt,
3708 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3713 #endif /* USE_STDIO_PTR */
3716 /* Note that calls to PerlIO_exportFILE() are reversed using
3717 * PerlIO_releaseFILE(), not importFILE. */
3719 PerlIO_exportFILE(PerlIO * f, const char *mode)
3723 if (PerlIOValid(f)) {
3725 int fd = PerlIO_fileno(f);
3730 if (!mode || !*mode) {
3731 mode = PerlIO_modestr(f, buf);
3733 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3737 /* De-link any lower layers so new :stdio sticks */
3739 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3740 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3742 PerlIOUnix_refcnt_inc(fileno(stdio));
3743 /* Link previous lower layers under new one */
3747 /* restore layers list */
3757 PerlIO_findFILE(PerlIO *f)
3762 if (l->tab == &PerlIO_stdio) {
3763 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3766 l = *PerlIONext(&l);
3768 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3769 /* However, we're not really exporting a FILE * to someone else (who
3770 becomes responsible for closing it, or calling PerlIO_releaseFILE())
3771 So we need to undo its reference count increase on the underlying file
3772 descriptor. We have to do this, because if the loop above returns you
3773 the FILE *, then *it* didn't increase any reference count. So there's
3774 only one way to be consistent. */
3775 stdio = PerlIO_exportFILE(f, NULL);
3777 const int fd = fileno(stdio);
3779 PerlIOUnix_refcnt_dec(fd);
3784 /* Use this to reverse PerlIO_exportFILE calls. */
3786 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3790 if (l->tab == &PerlIO_stdio) {
3791 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3792 if (s->stdio == f) { /* not in a loop */
3793 const int fd = fileno(f);
3795 PerlIOUnix_refcnt_dec(fd);
3798 PerlIO_pop(aTHX_ p);
3808 /*--------------------------------------------------------------------------------------*/
3810 * perlio buffer layer
3814 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3816 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3817 const int fd = PerlIO_fileno(f);
3818 if (fd >= 0 && PerlLIO_isatty(fd)) {
3819 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3821 if (*PerlIONext(f)) {
3822 const Off_t posn = PerlIO_tell(PerlIONext(f));
3823 if (posn != (Off_t) - 1) {
3827 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3831 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3832 IV n, const char *mode, int fd, int imode, int perm,
3833 PerlIO *f, int narg, SV **args)
3835 if (PerlIOValid(f)) {
3836 PerlIO *next = PerlIONext(f);
3838 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3839 if (tab && tab->Open)
3841 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3843 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3848 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3850 if (*mode == IoTYPE_IMPLICIT) {
3856 if (tab && tab->Open)
3857 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3860 SETERRNO(EINVAL, LIB_INVARG);
3862 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3864 * if push fails during open, open fails. close will pop us.
3869 fd = PerlIO_fileno(f);
3870 if (init && fd == 2) {
3872 * Initial stderr is unbuffered
3874 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3876 #ifdef PERLIO_USING_CRLF
3877 # ifdef PERLIO_IS_BINMODE_FD
3878 if (PERLIO_IS_BINMODE_FD(fd))
3879 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3883 * do something about failing setmode()? --jhi
3885 PerlLIO_setmode(fd, O_BINARY);
3888 /* Enable line buffering with record-oriented regular files
3889 * so we don't introduce an extraneous record boundary when
3890 * the buffer fills up.
3892 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3894 if (PerlLIO_fstat(fd, &st) == 0
3895 && S_ISREG(st.st_mode)
3896 && (st.st_fab_rfm == FAB$C_VAR
3897 || st.st_fab_rfm == FAB$C_VFC)) {
3898 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
3909 * This "flush" is akin to sfio's sync in that it handles files in either
3910 * read or write state. For write state, we put the postponed data through
3911 * the next layers. For read state, we seek() the next layers to the
3912 * offset given by current position in the buffer, and discard the buffer
3913 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3914 * in any case?). Then the pass the stick further in chain.
3917 PerlIOBuf_flush(pTHX_ PerlIO *f)
3919 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3921 PerlIO *n = PerlIONext(f);
3922 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3924 * write() the buffer
3926 const STDCHAR *buf = b->buf;
3927 const STDCHAR *p = buf;
3928 while (p < b->ptr) {
3929 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3933 else if (count < 0 || PerlIO_error(n)) {
3934 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3935 PerlIO_save_errno(f);
3940 b->posn += (p - buf);
3942 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3943 STDCHAR *buf = PerlIO_get_base(f);
3945 * Note position change
3947 b->posn += (b->ptr - buf);
3948 if (b->ptr < b->end) {
3949 /* We did not consume all of it - try and seek downstream to
3950 our logical position
3952 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3953 /* Reload n as some layers may pop themselves on seek */
3954 b->posn = PerlIO_tell(n = PerlIONext(f));
3957 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3958 data is lost for good - so return saying "ok" having undone
3961 b->posn -= (b->ptr - buf);
3966 b->ptr = b->end = b->buf;
3967 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3968 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3969 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3974 /* This discards the content of the buffer after b->ptr, and rereads
3975 * the buffer from the position off in the layer downstream; here off
3976 * is at offset corresponding to b->ptr - b->buf.
3979 PerlIOBuf_fill(pTHX_ PerlIO *f)
3981 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3982 PerlIO *n = PerlIONext(f);
3985 * Down-stream flush is defined not to loose read data so is harmless.
3986 * we would not normally be fill'ing if there was data left in anycase.
3988 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3990 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3991 PerlIOBase_flush_linebuf(aTHX);
3994 PerlIO_get_base(f); /* allocate via vtable */
3996 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3998 b->ptr = b->end = b->buf;
4000 if (!PerlIOValid(n)) {
4001 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4005 if (PerlIO_fast_gets(n)) {
4007 * Layer below is also buffered. We do _NOT_ want to call its
4008 * ->Read() because that will loop till it gets what we asked for
4009 * which may hang on a pipe etc. Instead take anything it has to
4010 * hand, or ask it to fill _once_.
4012 avail = PerlIO_get_cnt(n);
4014 avail = PerlIO_fill(n);
4016 avail = PerlIO_get_cnt(n);
4018 if (!PerlIO_error(n) && PerlIO_eof(n))
4023 STDCHAR *ptr = PerlIO_get_ptr(n);
4024 const SSize_t cnt = avail;
4025 if (avail > (SSize_t)b->bufsiz)
4027 Copy(ptr, b->buf, avail, STDCHAR);
4028 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
4032 avail = PerlIO_read(n, b->ptr, b->bufsiz);
4036 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4039 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
4040 PerlIO_save_errno(f);
4044 b->end = b->buf + avail;
4045 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4050 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4052 if (PerlIOValid(f)) {
4053 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4056 return PerlIOBase_read(aTHX_ f, vbuf, count);
4062 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4064 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4065 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4068 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4073 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4075 * Buffer is already a read buffer, we can overwrite any chars
4076 * which have been read back to buffer start
4078 avail = (b->ptr - b->buf);
4082 * Buffer is idle, set it up so whole buffer is available for
4086 b->end = b->buf + avail;
4088 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4090 * Buffer extends _back_ from where we are now
4092 b->posn -= b->bufsiz;
4094 if ((SSize_t) count >= 0 && avail > (SSize_t) count) {
4096 * If we have space for more than count, just move count
4104 * In simple stdio-like ungetc() case chars will be already
4107 if (buf != b->ptr) {
4108 Copy(buf, b->ptr, avail, STDCHAR);
4112 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4116 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
4122 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4124 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4125 const STDCHAR *buf = (const STDCHAR *) vbuf;
4126 const STDCHAR *flushptr = buf;
4130 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4132 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4133 if (PerlIO_flush(f) != 0) {
4137 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4138 flushptr = buf + count;
4139 while (flushptr > buf && *(flushptr - 1) != '\n')
4143 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
4144 if ((SSize_t) count >= 0 && (SSize_t) count < avail)
4146 if (flushptr > buf && flushptr <= buf + avail)
4147 avail = flushptr - buf;
4148 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4150 Copy(buf, b->ptr, avail, STDCHAR);
4155 if (buf == flushptr)
4158 if (b->ptr >= (b->buf + b->bufsiz))
4159 if (PerlIO_flush(f) == -1)
4162 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4168 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4171 if ((code = PerlIO_flush(f)) == 0) {
4172 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4173 code = PerlIO_seek(PerlIONext(f), offset, whence);
4175 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4176 b->posn = PerlIO_tell(PerlIONext(f));
4183 PerlIOBuf_tell(pTHX_ PerlIO *f)
4185 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4187 * b->posn is file position where b->buf was read, or will be written
4189 Off_t posn = b->posn;
4190 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
4191 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4193 /* As O_APPEND files are normally shared in some sense it is better
4198 /* when file is NOT shared then this is sufficient */
4199 PerlIO_seek(PerlIONext(f),0, SEEK_END);
4201 posn = b->posn = PerlIO_tell(PerlIONext(f));
4205 * If buffer is valid adjust position by amount in buffer
4207 posn += (b->ptr - b->buf);
4213 PerlIOBuf_popped(pTHX_ PerlIO *f)
4215 const IV code = PerlIOBase_popped(aTHX_ f);
4216 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4217 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4220 b->ptr = b->end = b->buf = NULL;
4221 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4226 PerlIOBuf_close(pTHX_ PerlIO *f)
4228 const IV code = PerlIOBase_close(aTHX_ f);
4229 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4230 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4233 b->ptr = b->end = b->buf = NULL;
4234 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4239 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
4241 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4248 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4250 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4253 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4254 return (b->end - b->ptr);
4259 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4261 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4262 PERL_UNUSED_CONTEXT;
4266 b->bufsiz = PERLIOBUF_DEFAULT_BUFSIZ;
4267 Newxz(b->buf,b->bufsiz, STDCHAR);
4269 b->buf = (STDCHAR *) & b->oneword;
4270 b->bufsiz = sizeof(b->oneword);
4272 b->end = b->ptr = b->buf;
4278 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4280 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4283 return (b->end - b->buf);
4287 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4289 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4291 PERL_UNUSED_ARG(cnt);
4296 assert(PerlIO_get_cnt(f) == cnt);
4297 assert(b->ptr >= b->buf);
4298 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4302 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4304 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4309 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4310 sizeof(PerlIO_funcs),
4313 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4317 PerlIOBase_binmode, /* binmode */
4331 PerlIOBase_clearerr,
4332 PerlIOBase_setlinebuf,
4337 PerlIOBuf_set_ptrcnt,
4340 /*--------------------------------------------------------------------------------------*/
4342 * Temp layer to hold unread chars when cannot do it any other way
4346 PerlIOPending_fill(pTHX_ PerlIO *f)
4349 * Should never happen
4356 PerlIOPending_close(pTHX_ PerlIO *f)
4359 * A tad tricky - flush pops us, then we close new top
4362 return PerlIO_close(f);
4366 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4369 * A tad tricky - flush pops us, then we seek new top
4372 return PerlIO_seek(f, offset, whence);
4377 PerlIOPending_flush(pTHX_ PerlIO *f)
4379 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4380 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4384 PerlIO_pop(aTHX_ f);
4389 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4395 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4400 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4402 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4403 PerlIOl * const l = PerlIOBase(f);
4405 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4406 * etc. get muddled when it changes mid-string when we auto-pop.
4408 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4409 (PerlIOBase(PerlIONext(f))->
4410 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4415 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4417 SSize_t avail = PerlIO_get_cnt(f);
4419 if ((SSize_t) count >= 0 && (SSize_t)count < avail)
4422 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4423 if (got >= 0 && got < (SSize_t)count) {
4424 const SSize_t more =
4425 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4426 if (more >= 0 || got == 0)
4432 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4433 sizeof(PerlIO_funcs),
4436 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4437 PerlIOPending_pushed,
4440 PerlIOBase_binmode, /* binmode */
4449 PerlIOPending_close,
4450 PerlIOPending_flush,
4454 PerlIOBase_clearerr,
4455 PerlIOBase_setlinebuf,
4460 PerlIOPending_set_ptrcnt,
4465 /*--------------------------------------------------------------------------------------*/
4467 * crlf - translation On read translate CR,LF to "\n" we do this by
4468 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4469 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4471 * c->nl points on the first byte of CR LF pair when it is temporarily
4472 * replaced by LF, or to the last CR of the buffer. In the former case
4473 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4474 * that it ends at c->nl; these two cases can be distinguished by
4475 * *c->nl. c->nl is set during _getcnt() call, and unset during
4476 * _unread() and _flush() calls.
4477 * It only matters for read operations.
4481 PerlIOBuf base; /* PerlIOBuf stuff */
4482 STDCHAR *nl; /* Position of crlf we "lied" about in the
4486 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4487 * Otherwise the :crlf layer would always revert back to
4491 S_inherit_utf8_flag(PerlIO *f)
4493 PerlIO *g = PerlIONext(f);
4494 if (PerlIOValid(g)) {
4495 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4496 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4502 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4505 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4506 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4509 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4510 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4511 PerlIOBase(f)->flags);
4515 /* If the old top layer is a CRLF layer, reactivate it (if
4516 * necessary) and remove this new layer from the stack */
4517 PerlIO *g = PerlIONext(f);
4518 if (PerlIOValid(g)) {
4519 PerlIOl *b = PerlIOBase(g);
4520 if (b && b->tab == &PerlIO_crlf) {
4521 if (!(b->flags & PERLIO_F_CRLF))
4522 b->flags |= PERLIO_F_CRLF;
4523 S_inherit_utf8_flag(g);
4524 PerlIO_pop(aTHX_ f);
4529 S_inherit_utf8_flag(f);
4535 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4537 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4538 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4539 *(c->nl) = NATIVE_0xd;
4542 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4543 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4545 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4546 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4548 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4553 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4554 b->end = b->ptr = b->buf + b->bufsiz;
4555 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4556 b->posn -= b->bufsiz;
4558 while (count > 0 && b->ptr > b->buf) {
4559 const int ch = *--buf;
4561 if (b->ptr - 2 >= b->buf) {
4562 *--(b->ptr) = NATIVE_0xa;
4563 *--(b->ptr) = NATIVE_0xd;
4568 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4569 *--(b->ptr) = NATIVE_0xa; /* Works even if 0xa ==
4583 unread += PerlIOBase_unread(aTHX_ f, (const STDCHAR *) vbuf + unread, count);
4588 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4590 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4592 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4595 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4596 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4597 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == NATIVE_0xd)) {
4598 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4600 while (nl < b->end && *nl != NATIVE_0xd)
4602 if (nl < b->end && *nl == NATIVE_0xd) {
4604 if (nl + 1 < b->end) {
4605 if (nl[1] == NATIVE_0xa) {
4611 * Not CR,LF but just CR
4619 * Blast - found CR as last char in buffer
4624 * They may not care, defer work as long as
4628 return (nl - b->ptr);
4632 b->ptr++; /* say we have read it as far as
4633 * flush() is concerned */
4634 b->buf++; /* Leave space in front of buffer */
4635 /* Note as we have moved buf up flush's
4637 will naturally make posn point at CR
4639 b->bufsiz--; /* Buffer is thus smaller */
4640 code = PerlIO_fill(f); /* Fetch some more */
4641 b->bufsiz++; /* Restore size for next time */
4642 b->buf--; /* Point at space */
4643 b->ptr = nl = b->buf; /* Which is what we hand
4645 *nl = NATIVE_0xd; /* Fill in the CR */
4647 goto test; /* fill() call worked */
4649 * CR at EOF - just fall through
4651 /* Should we clear EOF though ??? */
4656 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4662 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4664 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4665 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4671 if (ptr == b->end && *c->nl == NATIVE_0xd) {
4672 /* Deferred CR at end of buffer case - we lied about count */
4685 * Test code - delete when it works ...
4687 IV flags = PerlIOBase(f)->flags;
4688 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4689 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == NATIVE_0xd) {
4690 /* Deferred CR at end of buffer case - we lied about count */
4696 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4697 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4698 flags, c->nl, b->end, cnt);
4705 * They have taken what we lied about
4707 *(c->nl) = NATIVE_0xd;
4713 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4717 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4719 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4720 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4722 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4723 const STDCHAR *buf = (const STDCHAR *) vbuf;
4724 const STDCHAR * const ebuf = buf + count;
4727 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4729 while (buf < ebuf) {
4730 const STDCHAR * const eptr = b->buf + b->bufsiz;
4731 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4732 while (buf < ebuf && b->ptr < eptr) {
4734 if ((b->ptr + 2) > eptr) {
4742 *(b->ptr)++ = NATIVE_0xd; /* CR */
4743 *(b->ptr)++ = NATIVE_0xa; /* LF */
4745 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4752 *(b->ptr)++ = *buf++;
4754 if (b->ptr >= eptr) {
4760 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4762 return (buf - (STDCHAR *) vbuf);
4767 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4769 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4771 *(c->nl) = NATIVE_0xd;
4774 return PerlIOBuf_flush(aTHX_ f);
4778 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4780 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4781 /* In text mode - flush any pending stuff and flip it */
4782 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4783 #ifndef PERLIO_USING_CRLF
4784 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4785 PerlIO_pop(aTHX_ f);
4791 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4792 sizeof(PerlIO_funcs),
4795 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4797 PerlIOBuf_popped, /* popped */
4799 PerlIOCrlf_binmode, /* binmode */
4803 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4804 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4805 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4813 PerlIOBase_clearerr,
4814 PerlIOBase_setlinebuf,
4819 PerlIOCrlf_set_ptrcnt,
4823 Perl_PerlIO_stdin(pTHX)
4826 PerlIO_stdstreams(aTHX);
4828 return (PerlIO*)&PL_perlio[1];
4832 Perl_PerlIO_stdout(pTHX)
4835 PerlIO_stdstreams(aTHX);
4837 return (PerlIO*)&PL_perlio[2];
4841 Perl_PerlIO_stderr(pTHX)
4844 PerlIO_stdstreams(aTHX);
4846 return (PerlIO*)&PL_perlio[3];
4849 /*--------------------------------------------------------------------------------------*/
4852 PerlIO_getname(PerlIO *f, char *buf)
4857 bool exported = FALSE;
4858 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4860 stdio = PerlIO_exportFILE(f,0);
4864 name = fgetname(stdio, buf);
4865 if (exported) PerlIO_releaseFILE(f,stdio);
4870 PERL_UNUSED_ARG(buf);
4871 Perl_croak_nocontext("Don't know how to get file name");
4877 /*--------------------------------------------------------------------------------------*/
4879 * Functions which can be called on any kind of PerlIO implemented in
4883 #undef PerlIO_fdopen
4885 PerlIO_fdopen(int fd, const char *mode)
4888 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4893 PerlIO_open(const char *path, const char *mode)
4896 SV *name = sv_2mortal(newSVpv(path, 0));
4897 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4900 #undef Perlio_reopen
4902 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4905 SV *name = sv_2mortal(newSVpv(path,0));
4906 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4911 PerlIO_getc(PerlIO *f)
4915 if ( 1 == PerlIO_read(f, buf, 1) ) {
4916 return (unsigned char) buf[0];
4921 #undef PerlIO_ungetc
4923 PerlIO_ungetc(PerlIO *f, int ch)
4928 if (PerlIO_unread(f, &buf, 1) == 1)
4936 PerlIO_putc(PerlIO *f, int ch)
4940 return PerlIO_write(f, &buf, 1);
4945 PerlIO_puts(PerlIO *f, const char *s)
4948 return PerlIO_write(f, s, strlen(s));
4951 #undef PerlIO_rewind
4953 PerlIO_rewind(PerlIO *f)
4956 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4960 #undef PerlIO_vprintf
4962 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4971 Perl_va_copy(ap, apc);
4972 sv = vnewSVpvf(fmt, &apc);
4975 sv = vnewSVpvf(fmt, &ap);
4977 s = SvPV_const(sv, len);
4978 wrote = PerlIO_write(f, s, len);
4983 #undef PerlIO_printf
4985 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4990 result = PerlIO_vprintf(f, fmt, ap);
4995 #undef PerlIO_stdoutf
4997 PerlIO_stdoutf(const char *fmt, ...)
5003 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5008 #undef PerlIO_tmpfile
5010 PerlIO_tmpfile(void)
5017 const int fd = win32_tmpfd();
5019 f = PerlIO_fdopen(fd, "w+b");
5021 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5023 char tempname[] = "/tmp/PerlIO_XXXXXX";
5024 const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
5026 int old_umask = umask(0177);
5028 * I have no idea how portable mkstemp() is ... NI-S
5030 if (tmpdir && *tmpdir) {
5031 /* if TMPDIR is set and not empty, we try that first */
5032 sv = newSVpv(tmpdir, 0);
5033 sv_catpv(sv, tempname + 4);
5034 fd = mkstemp(SvPVX(sv));
5039 /* else we try /tmp */
5040 fd = mkstemp(tempname);
5045 sv_catpv(sv, tempname + 4);
5046 fd = mkstemp(SvPVX(sv));
5050 f = PerlIO_fdopen(fd, "w+");
5052 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5053 PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
5056 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5057 FILE * const stdio = PerlSIO_tmpfile();
5060 f = PerlIO_fdopen(fileno(stdio), "w+");
5062 # endif /* else HAS_MKSTEMP */
5063 #endif /* else WIN32 */
5068 Perl_PerlIO_save_errno(pTHX_ PerlIO *f)
5070 if (!PerlIOValid(f))
5072 PerlIOBase(f)->err = errno;
5074 PerlIOBase(f)->os_err = vaxc$errno;
5076 PerlIOBase(f)->os_err = Perl_rc;
5077 #elif defined(WIN32)
5078 PerlIOBase(f)->os_err = GetLastError();
5083 Perl_PerlIO_restore_errno(pTHX_ PerlIO *f)
5085 if (!PerlIOValid(f))
5087 SETERRNO(PerlIOBase(f)->err, PerlIOBase(f)->os_err);
5089 Perl_rc = PerlIOBase(f)->os_err);
5090 #elif defined(WIN32)
5091 SetLastError(PerlIOBase(f)->os_err);
5099 /*======================================================================================*/
5101 * Now some functions in terms of above which may be needed even if we are
5102 * not in true PerlIO mode
5105 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5107 const char *direction = NULL;
5110 * Need to supply default layer info from open.pm
5116 if (mode && mode[0] != 'r') {
5117 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
5118 direction = "open>";
5120 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
5121 direction = "open<";
5126 layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
5129 return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;
5134 #undef PerlIO_setpos
5136 PerlIO_setpos(PerlIO *f, SV *pos)
5142 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5143 if(len == sizeof(Off_t))
5144 return PerlIO_seek(f, *posn, SEEK_SET);
5147 SETERRNO(EINVAL, SS_IVCHAN);
5151 #undef PerlIO_setpos
5153 PerlIO_setpos(PerlIO *f, SV *pos)
5159 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5160 if(len == sizeof(Fpos_t))
5161 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5162 return fsetpos64(f, fpos);
5164 return fsetpos(f, fpos);
5168 SETERRNO(EINVAL, SS_IVCHAN);
5174 #undef PerlIO_getpos
5176 PerlIO_getpos(PerlIO *f, SV *pos)
5179 Off_t posn = PerlIO_tell(f);
5180 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5181 return (posn == (Off_t) - 1) ? -1 : 0;
5184 #undef PerlIO_getpos
5186 PerlIO_getpos(PerlIO *f, SV *pos)
5191 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5192 code = fgetpos64(f, &fpos);
5194 code = fgetpos(f, &fpos);
5196 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5201 #if !defined(HAS_VPRINTF)
5204 vprintf(char *pat, char *args)
5206 _doprnt(pat, args, stdout);
5207 return 0; /* wrong, but perl doesn't use the return
5212 vfprintf(FILE *fd, char *pat, char *args)
5214 _doprnt(pat, args, fd);
5215 return 0; /* wrong, but perl doesn't use the return
5221 /* print a failure format string message to stderr and fail exit the process
5222 using only libc without depending on any perl data structures being
5227 Perl_noperl_die(const char* pat, ...)
5230 PERL_ARGS_ASSERT_NOPERL_DIE;
5231 va_start(arglist, pat);
5232 vfprintf(stderr, pat, arglist);
5238 * ex: set ts=8 sts=4 sw=4 et: