3 * Copyright (c) 1996-2006, Nick Ing-Simmons
4 * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public License
7 * or the Artistic License, as specified in the README file.
11 * Hour after hour for nearly three weary days he had jogged up and down,
12 * over passes, and through long dales, and across many streams.
14 * [pp.791-792 of _The Lord of the Rings_, V/iii: "The Muster of Rohan"]
17 /* This file contains the functions needed to implement PerlIO, which
18 * is Perl's private replacement for the C stdio library. This is used
19 * by default unless you compile with -Uuseperlio or run with
20 * PERLIO=:stdio (but don't do this unless you know what you're doing)
24 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
25 * at the dispatch tables, even when we do not need it for other reasons.
26 * Invent a dSYS macro to abstract this out
28 #ifdef PERL_IMPLICIT_SYS
34 #define PERLIO_NOT_STDIO 0
36 * This file provides those parts of PerlIO abstraction
37 * which are not #defined in perlio.h.
38 * Which these are depends on various Configure #ifdef's
42 #define PERL_IN_PERLIO_C
45 #ifdef PERL_IMPLICIT_CONTEXT
53 /* Missing proto on LynxOS */
61 #define PerlIO_lockcnt(f) (((PerlIOl*)(f))->head->flags)
63 /* Call the callback or PerlIOBase, and return failure. */
64 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
65 if (PerlIOValid(f)) { \
66 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
67 if (tab && tab->callback) \
68 return (*tab->callback) args; \
70 return PerlIOBase_ ## base args; \
73 SETERRNO(EBADF, SS_IVCHAN); \
76 /* Call the callback or fail, and return failure. */
77 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
78 if (PerlIOValid(f)) { \
79 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
80 if (tab && tab->callback) \
81 return (*tab->callback) args; \
82 SETERRNO(EINVAL, LIB_INVARG); \
85 SETERRNO(EBADF, SS_IVCHAN); \
88 /* Call the callback or PerlIOBase, and be void. */
89 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
90 if (PerlIOValid(f)) { \
91 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
92 if (tab && tab->callback) \
93 (*tab->callback) args; \
95 PerlIOBase_ ## base args; \
98 SETERRNO(EBADF, SS_IVCHAN)
100 /* Call the callback or fail, and be void. */
101 #define Perl_PerlIO_or_fail_void(f, callback, args) \
102 if (PerlIOValid(f)) { \
103 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
104 if (tab && tab->callback) \
105 (*tab->callback) args; \
107 SETERRNO(EINVAL, LIB_INVARG); \
110 SETERRNO(EBADF, SS_IVCHAN)
112 #if defined(__osf__) && _XOPEN_SOURCE < 500
113 extern int fseeko(FILE *, off_t, int);
114 extern off_t ftello(FILE *);
117 #define NATIVE_0xd CR_NATIVE
118 #define NATIVE_0xa LF_NATIVE
120 EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
123 perlsio_binmode(FILE *fp, int iotype, int mode)
126 * This used to be contents of do_binmode in doio.c
130 PERL_UNUSED_ARG(iotype);
132 if (PerlLIO_setmode(fp, mode) != -1) {
134 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
141 # if defined(USEMYBINMODE)
143 # if defined(__CYGWIN__)
144 PERL_UNUSED_ARG(iotype);
146 if (my_binmode(fp, iotype, mode) != FALSE)
152 PERL_UNUSED_ARG(iotype);
153 PERL_UNUSED_ARG(mode);
160 #define O_ACCMODE 3 /* Assume traditional implementation */
164 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
166 const int result = rawmode & O_ACCMODE;
171 ptype = IoTYPE_RDONLY;
174 ptype = IoTYPE_WRONLY;
182 *writing = (result != O_RDONLY);
184 if (result == O_RDONLY) {
188 else if (rawmode & O_APPEND) {
190 if (result != O_WRONLY)
195 if (result == O_WRONLY)
203 /* Unless O_BINARY is different from zero, bit-and:ing
204 * with it won't do much good. */
205 if (rawmode & O_BINARY)
212 #ifndef PERLIO_LAYERS
214 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
216 if (!names || !*names
217 || strEQ(names, ":crlf")
218 || strEQ(names, ":raw")
219 || strEQ(names, ":bytes")
223 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
231 PerlIO_destruct(pTHX)
236 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
238 return perlsio_binmode(fp, iotype, mode);
242 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
244 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
247 #ifdef PERL_IMPLICIT_SYS
248 return PerlSIO_fdupopen(f);
251 return win32_fdupopen(f);
254 const int fd = PerlLIO_dup(PerlIO_fileno(f));
258 const int omode = djgpp_get_stream_mode(f);
260 const int omode = fcntl(fd, F_GETFL);
262 PerlIO_intmode2str(omode,mode,NULL);
263 /* the r+ is a hack */
264 return PerlIO_fdopen(fd, mode);
269 SETERRNO(EBADF, SS_IVCHAN);
279 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
283 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
284 int imode, int perm, PerlIO *old, int narg, SV **args)
288 Perl_croak(aTHX_ "More than one argument to open");
290 if (*args == &PL_sv_undef)
291 return PerlIO_tmpfile();
294 const char *name = SvPV_const(*args, len);
295 if (!IS_SAFE_PATHNAME(name, len, "open"))
298 if (*mode == IoTYPE_NUMERIC) {
299 fd = PerlLIO_open3(name, imode, perm);
301 return PerlIO_fdopen(fd, mode + 1);
304 return PerlIO_reopen(name, mode, old);
307 return PerlIO_open(name, mode);
312 return PerlIO_fdopen(fd, (char *) mode);
317 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
318 XS(XS_PerlIO__Layer__find)
322 Perl_croak(aTHX_ "Usage class->find(name[,load])");
324 const char * const name = SvPV_nolen_const(ST(1));
325 ST(0) = (strEQ(name, "crlf")
326 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
333 Perl_boot_core_PerlIO(pTHX)
335 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
341 /*======================================================================================*/
343 * Implement all the PerlIO interface ourselves.
349 PerlIO_debug(const char *fmt, ...)
359 if (!PL_perlio_debug_fd) {
361 PerlProc_getuid() == PerlProc_geteuid() &&
362 PerlProc_getgid() == PerlProc_getegid()) {
363 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
366 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
368 PL_perlio_debug_fd = PerlLIO_dup(2); /* stderr */
370 /* tainting or set*id, so ignore the environment and send the
371 debug output to stderr, like other -D switches. */
372 PL_perlio_debug_fd = PerlLIO_dup(2); /* stderr */
375 if (PL_perlio_debug_fd > 0) {
377 const char * const s = CopFILE(PL_curcop);
378 /* Use fixed buffer as sv_catpvf etc. needs SVs */
380 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
381 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
382 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2));
384 const char *s = CopFILE(PL_curcop);
386 SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
387 (IV) CopLINE(PL_curcop));
388 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
390 s = SvPV_const(sv, len);
391 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, s, len));
398 /*--------------------------------------------------------------------------------------*/
401 * Inner level routines
404 /* check that the head field of each layer points back to the head */
407 # define VERIFY_HEAD(f) PerlIO_verify_head(aTHX_ f)
409 PerlIO_verify_head(pTHX_ PerlIO *f)
413 #ifndef PERL_IMPLICIT_SYS
418 p = head = PerlIOBase(f)->head;
421 assert(p->head == head);
422 if (p == (PerlIOl*)f)
429 # define VERIFY_HEAD(f)
434 * Table of pointers to the PerlIO structs (malloc'ed)
436 #define PERLIO_TABLE_SIZE 64
439 PerlIO_init_table(pTHX)
443 Newxz(PL_perlio, PERLIO_TABLE_SIZE, PerlIOl);
449 PerlIO_allocate(pTHX)
452 * Find a free slot in the table, allocating new table as necessary
457 while ((f = *last)) {
459 last = (PerlIOl **) (f);
460 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
461 if (!((++f)->next)) {
466 Newxz(f,PERLIO_TABLE_SIZE,PerlIOl);
470 *last = (PerlIOl*) f++;
473 f->flags = 0; /* lockcnt */
479 #undef PerlIO_fdupopen
481 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
483 if (PerlIOValid(f)) {
484 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
485 DEBUG_i( PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param) );
487 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
489 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
493 SETERRNO(EBADF, SS_IVCHAN);
499 PerlIO_cleantable(pTHX_ PerlIOl **tablep)
501 PerlIOl * const table = *tablep;
504 PerlIO_cleantable(aTHX_(PerlIOl **) & (table[0]));
505 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
506 PerlIOl * const f = table + i;
508 PerlIO_close(&(f->next));
518 PerlIO_list_alloc(pTHX)
522 Newxz(list, 1, PerlIO_list_t);
528 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
531 if (--list->refcnt == 0) {
534 for (i = 0; i < list->cur; i++)
535 SvREFCNT_dec(list->array[i].arg);
536 Safefree(list->array);
544 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
549 if (list->cur >= list->len) {
552 Renew(list->array, list->len, PerlIO_pair_t);
554 Newx(list->array, list->len, PerlIO_pair_t);
556 p = &(list->array[list->cur++]);
558 if ((p->arg = arg)) {
559 SvREFCNT_inc_simple_void_NN(arg);
564 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
566 PerlIO_list_t *list = NULL;
569 list = PerlIO_list_alloc(aTHX);
570 for (i=0; i < proto->cur; i++) {
571 SV *arg = proto->array[i].arg;
574 arg = sv_dup(arg, param);
576 PERL_UNUSED_ARG(param);
578 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
585 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
588 PerlIOl **table = &proto->Iperlio;
591 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
592 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
593 PerlIO_init_table(aTHX);
594 DEBUG_i( PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto) );
595 while ((f = *table)) {
597 table = (PerlIOl **) (f++);
598 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
600 (void) fp_dup(&(f->next), 0, param);
607 PERL_UNUSED_ARG(proto);
608 PERL_UNUSED_ARG(param);
613 PerlIO_destruct(pTHX)
615 PerlIOl **table = &PL_perlio;
618 DEBUG_i( PerlIO_debug("Destruct %p\n",(void*)aTHX) );
620 while ((f = *table)) {
622 table = (PerlIOl **) (f++);
623 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
624 PerlIO *x = &(f->next);
627 if (l->tab && l->tab->kind & PERLIO_K_DESTRUCT) {
628 DEBUG_i( PerlIO_debug("Destruct popping %s\n", l->tab->name) );
642 PerlIO_pop(pTHX_ PerlIO *f)
644 const PerlIOl *l = *f;
647 DEBUG_i( PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f,
648 l->tab ? l->tab->name : "(Null)") );
649 if (l->tab && l->tab->Popped) {
651 * If popped returns non-zero do not free its layer structure
652 * it has either done so itself, or it is shared and still in
655 if ((*l->tab->Popped) (aTHX_ f) != 0)
658 if (PerlIO_lockcnt(f)) {
659 /* we're in use; defer freeing the structure */
660 PerlIOBase(f)->flags = PERLIO_F_CLEARED;
661 PerlIOBase(f)->tab = NULL;
671 /* Return as an array the stack of layers on a filehandle. Note that
672 * the stack is returned top-first in the array, and there are three
673 * times as many array elements as there are layers in the stack: the
674 * first element of a layer triplet is the name, the second one is the
675 * arguments, and the third one is the flags. */
678 PerlIO_get_layers(pTHX_ PerlIO *f)
680 AV * const av = newAV();
682 if (PerlIOValid(f)) {
683 PerlIOl *l = PerlIOBase(f);
686 /* There is some collusion in the implementation of
687 XS_PerlIO_get_layers - it knows that name and flags are
688 generated as fresh SVs here, and takes advantage of that to
689 "copy" them by taking a reference. If it changes here, it needs
690 to change there too. */
691 SV * const name = l->tab && l->tab->name ?
692 newSVpv(l->tab->name, 0) : &PL_sv_undef;
693 SV * const arg = l->tab && l->tab->Getarg ?
694 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
697 av_push(av, newSViv((IV)l->flags));
705 /*--------------------------------------------------------------------------------------*/
707 * XS Interface for perl code
711 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
715 if ((SSize_t) len <= 0)
717 for (i = 0; i < PL_known_layers->cur; i++) {
718 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
719 const STRLEN this_len = strlen(f->name);
720 if (this_len == len && memEQ(f->name, name, len)) {
721 DEBUG_i( PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f) );
725 if (load && PL_subname && PL_def_layerlist
726 && PL_def_layerlist->cur >= 2) {
727 if (PL_in_load_module) {
728 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
731 SV * const pkgsv = newSVpvs("PerlIO");
732 SV * const layer = newSVpvn(name, len);
733 CV * const cv = get_cvs("PerlIO::Layer::NoWarnings", 0);
735 SAVEBOOL(PL_in_load_module);
737 SAVEGENERICSV(PL_warnhook);
738 PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
740 PL_in_load_module = TRUE;
742 * The two SVs are magically freed by load_module
744 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
746 return PerlIO_find_layer(aTHX_ name, len, 0);
749 DEBUG_i( PerlIO_debug("Cannot find %.*s\n", (int) len, name) );
753 #ifdef USE_ATTRIBUTES_FOR_PERLIO
756 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
759 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
760 PerlIO * const ifp = IoIFP(io);
761 PerlIO * const ofp = IoOFP(io);
762 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
763 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
769 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
772 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
773 PerlIO * const ifp = IoIFP(io);
774 PerlIO * const ofp = IoOFP(io);
775 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
776 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
782 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
784 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
789 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
791 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
795 MGVTBL perlio_vtab = {
803 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
804 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
807 SV * const sv = SvRV(ST(1));
808 AV * const av = newAV();
812 sv_magic(sv, MUTABLE_SV(av), PERL_MAGIC_ext, NULL, 0);
814 mg = mg_find(sv, PERL_MAGIC_ext);
815 mg->mg_virtual = &perlio_vtab;
817 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
818 for (i = 2; i < items; i++) {
820 const char * const name = SvPV_const(ST(i), len);
821 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
823 av_push(av, SvREFCNT_inc_simple_NN(layer));
834 #endif /* USE_ATTRIBUTES_FOR_PERLIO */
837 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
839 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
840 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
844 XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
845 XS(XS_PerlIO__Layer__NoWarnings)
847 /* This is used as a %SIG{__WARN__} handler to suppress warnings
848 during loading of layers.
852 PERL_UNUSED_VAR(items);
855 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0))) );
859 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
860 XS(XS_PerlIO__Layer__find)
865 Perl_croak(aTHX_ "Usage class->find(name[,load])");
868 const char * const name = SvPV_const(ST(1), len);
869 const bool load = (items > 2) ? SvTRUE_NN(ST(2)) : 0;
870 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
872 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
879 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
881 if (!PL_known_layers)
882 PL_known_layers = PerlIO_list_alloc(aTHX);
883 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
884 DEBUG_i( PerlIO_debug("define %s %p\n", tab->name, (void*)tab) );
888 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
891 const char *s = names;
893 while (isSPACE(*s) || *s == ':')
898 const char *as = NULL;
900 if (!isIDFIRST(*s)) {
902 * Message is consistent with how attribute lists are
903 * passed. Even though this means "foo : : bar" is
904 * seen as an invalid separator character.
906 const char q = ((*s == '\'') ? '"' : '\'');
907 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
908 "Invalid separator character %c%c%c in PerlIO layer specification %s",
910 SETERRNO(EINVAL, LIB_INVARG);
915 } while (isWORDCHAR(*e));
931 * It's a nul terminated string, not allowed
932 * to \ the terminating null. Anything other
933 * character is passed over.
943 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
944 "Argument list not closed for PerlIO layer \"%.*s\"",
956 PerlIO_funcs * const layer =
957 PerlIO_find_layer(aTHX_ s, llen, 1);
961 arg = newSVpvn(as, alen);
962 PerlIO_list_push(aTHX_ av, layer,
963 (arg) ? arg : &PL_sv_undef);
967 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
980 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
982 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
983 #ifdef PERLIO_USING_CRLF
986 if (PerlIO_stdio.Set_ptrcnt)
989 DEBUG_i( PerlIO_debug("Pushing %s\n", tab->name) );
990 PerlIO_list_push(aTHX_ av, (PerlIO_funcs *)tab, &PL_sv_undef);
994 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
996 return av->array[n].arg;
1000 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1002 if (n >= 0 && n < av->cur) {
1003 DEBUG_i( PerlIO_debug("Layer %" IVdf " is %s\n", n,
1004 av->array[n].funcs->name) );
1005 return av->array[n].funcs;
1008 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1013 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1015 PERL_UNUSED_ARG(mode);
1016 PERL_UNUSED_ARG(arg);
1017 PERL_UNUSED_ARG(tab);
1018 if (PerlIOValid(f)) {
1020 PerlIO_pop(aTHX_ f);
1026 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1027 sizeof(PerlIO_funcs),
1030 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1050 NULL, /* get_base */
1051 NULL, /* get_bufsiz */
1054 NULL, /* set_ptrcnt */
1058 PerlIO_default_layers(pTHX)
1060 if (!PL_def_layerlist) {
1061 const char * const s = TAINTING_get ? NULL : PerlEnv_getenv("PERLIO");
1062 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1063 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1064 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1066 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1068 osLayer = &PerlIO_win32;
1071 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1072 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1073 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1074 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1075 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1076 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1077 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1078 PerlIO_list_push(aTHX_ PL_def_layerlist, (PerlIO_funcs *)osLayer,
1081 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1084 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1087 if (PL_def_layerlist->cur < 2) {
1088 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1090 return PL_def_layerlist;
1094 Perl_boot_core_PerlIO(pTHX)
1096 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1097 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1100 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1101 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1105 PerlIO_default_layer(pTHX_ I32 n)
1107 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1110 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1113 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1114 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1117 PerlIO_stdstreams(pTHX)
1120 PerlIO_init_table(aTHX);
1121 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1122 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1123 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1128 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1131 if (tab->fsize != sizeof(PerlIO_funcs)) {
1133 "%s (%"UVuf") does not match %s (%"UVuf")",
1134 "PerlIO layer function table size", (UV)tab->fsize,
1135 "size expected by this perl", (UV)sizeof(PerlIO_funcs) );
1139 if (tab->size < sizeof(PerlIOl)) {
1141 "%s (%"UVuf") smaller than %s (%"UVuf")",
1142 "PerlIO layer instance size", (UV)tab->size,
1143 "size expected by this perl", (UV)sizeof(PerlIOl) );
1145 /* Real layer with a data area */
1148 Newxz(temp, tab->size, char);
1152 l->tab = (PerlIO_funcs*) tab;
1153 l->head = ((PerlIOl*)f)->head;
1155 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1156 (void*)f, tab->name,
1157 (mode) ? mode : "(Null)", (void*)arg) );
1158 if (*l->tab->Pushed &&
1160 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1161 PerlIO_pop(aTHX_ f);
1170 /* Pseudo-layer where push does its own stack adjust */
1171 DEBUG_i( PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1172 (mode) ? mode : "(Null)", (void*)arg) );
1174 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1182 PerlIOBase_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1183 IV n, const char *mode, int fd, int imode, int perm,
1184 PerlIO *old, int narg, SV **args)
1186 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_layer(aTHX_ 0));
1187 if (tab && tab->Open) {
1188 PerlIO* ret = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm, old, narg, args);
1189 if (ret && PerlIO_push(aTHX_ ret, self, mode, PerlIOArg) == NULL) {
1195 SETERRNO(EINVAL, LIB_INVARG);
1200 PerlIOBase_binmode(pTHX_ PerlIO *f)
1202 if (PerlIOValid(f)) {
1203 /* Is layer suitable for raw stream ? */
1204 if (PerlIOBase(f)->tab && PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1205 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1206 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1209 /* Not suitable - pop it */
1210 PerlIO_pop(aTHX_ f);
1218 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1220 PERL_UNUSED_ARG(mode);
1221 PERL_UNUSED_ARG(arg);
1222 PERL_UNUSED_ARG(tab);
1224 if (PerlIOValid(f)) {
1229 * Strip all layers that are not suitable for a raw stream
1232 while (t && (l = *t)) {
1233 if (l->tab && l->tab->Binmode) {
1234 /* Has a handler - normal case */
1235 if ((*l->tab->Binmode)(aTHX_ t) == 0) {
1237 /* Layer still there - move down a layer */
1246 /* No handler - pop it */
1247 PerlIO_pop(aTHX_ t);
1250 if (PerlIOValid(f)) {
1251 DEBUG_i( PerlIO_debug(":raw f=%p :%s\n", (void*)f,
1252 PerlIOBase(f)->tab ? PerlIOBase(f)->tab->name : "(Null)") );
1260 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1261 PerlIO_list_t *layers, IV n, IV max)
1265 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1267 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1278 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1282 save_scalar(PL_errgv);
1284 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1285 code = PerlIO_parse_layers(aTHX_ layers, names);
1287 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1289 PerlIO_list_free(aTHX_ layers);
1296 /*--------------------------------------------------------------------------------------*/
1298 * Given the abstraction above the public API functions
1302 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1304 PERL_UNUSED_ARG(iotype);
1305 PERL_UNUSED_ARG(mode);
1308 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1309 (PerlIOBase(f) && PerlIOBase(f)->tab) ?
1310 PerlIOBase(f)->tab->name : "(Null)",
1311 iotype, mode, (names) ? names : "(Null)") );
1314 /* Do not flush etc. if (e.g.) switching encodings.
1315 if a pushed layer knows it needs to flush lower layers
1316 (for example :unix which is never going to call them)
1317 it can do the flush when it is pushed.
1319 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1322 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1323 #ifdef PERLIO_USING_CRLF
1324 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1325 O_BINARY so we can look for it in mode.
1327 if (!(mode & O_BINARY)) {
1329 /* FIXME?: Looking down the layer stack seems wrong,
1330 but is a way of reaching past (say) an encoding layer
1331 to flip CRLF-ness of the layer(s) below
1334 /* Perhaps we should turn on bottom-most aware layer
1335 e.g. Ilya's idea that UNIX TTY could serve
1337 if (PerlIOBase(f)->tab &&
1338 PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF)
1340 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1341 /* Not in text mode - flush any pending stuff and flip it */
1343 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1345 /* Only need to turn it on in one layer so we are done */
1350 /* Not finding a CRLF aware layer presumably means we are binary
1351 which is not what was requested - so we failed
1352 We _could_ push :crlf layer but so could caller
1357 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1358 So code that used to be here is now in PerlIORaw_pushed().
1360 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1365 PerlIO__close(pTHX_ PerlIO *f)
1367 if (PerlIOValid(f)) {
1368 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1369 if (tab && tab->Close)
1370 return (*tab->Close)(aTHX_ f);
1372 return PerlIOBase_close(aTHX_ f);
1375 SETERRNO(EBADF, SS_IVCHAN);
1381 Perl_PerlIO_close(pTHX_ PerlIO *f)
1383 const int code = PerlIO__close(aTHX_ f);
1384 while (PerlIOValid(f)) {
1385 PerlIO_pop(aTHX_ f);
1386 if (PerlIO_lockcnt(f))
1387 /* we're in use; the 'pop' deferred freeing the structure */
1394 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1396 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1400 static PerlIO_funcs *
1401 PerlIO_layer_from_ref(pTHX_ SV *sv)
1404 * For any scalar type load the handler which is bundled with perl
1406 if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
1407 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1408 /* This isn't supposed to happen, since PerlIO::scalar is core,
1409 * but could happen anyway in smaller installs or with PAR */
1411 /* diag_listed_as: Unknown PerlIO layer "%s" */
1412 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1417 * For other types allow if layer is known but don't try and load it
1419 switch (SvTYPE(sv)) {
1421 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1423 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1425 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1427 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1434 PerlIO_resolve_layers(pTHX_ const char *layers,
1435 const char *mode, int narg, SV **args)
1437 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1440 PerlIO_stdstreams(aTHX);
1442 SV * const arg = *args;
1444 * If it is a reference but not an object see if we have a handler
1447 if (SvROK(arg) && !SvOBJECT(SvRV(arg))) {
1448 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1450 def = PerlIO_list_alloc(aTHX);
1451 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1455 * Don't fail if handler cannot be found :via(...) etc. may do
1456 * something sensible else we will just stringfy and open
1461 if (!layers || !*layers)
1462 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1463 if (layers && *layers) {
1466 av = PerlIO_clone_list(aTHX_ def, NULL);
1471 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1475 PerlIO_list_free(aTHX_ av);
1487 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1488 int imode, int perm, PerlIO *f, int narg, SV **args)
1490 if (!f && narg == 1 && *args == &PL_sv_undef) {
1491 if ((f = PerlIO_tmpfile())) {
1492 if (!layers || !*layers)
1493 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1494 if (layers && *layers)
1495 PerlIO_apply_layers(aTHX_ f, mode, layers);
1499 PerlIO_list_t *layera;
1501 PerlIO_funcs *tab = NULL;
1502 if (PerlIOValid(f)) {
1504 * This is "reopen" - it is not tested as perl does not use it
1508 layera = PerlIO_list_alloc(aTHX);
1511 if (l->tab && l->tab->Getarg)
1512 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1513 PerlIO_list_push(aTHX_ layera, l->tab,
1514 (arg) ? arg : &PL_sv_undef);
1516 l = *PerlIONext(&l);
1520 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1526 * Start at "top" of layer stack
1528 n = layera->cur - 1;
1530 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1539 * Found that layer 'n' can do opens - call it
1541 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1542 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1544 DEBUG_i( PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1545 tab->name, layers ? layers : "(Null)", mode, fd,
1546 imode, perm, (void*)f, narg, (void*)args) );
1548 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1551 SETERRNO(EINVAL, LIB_INVARG);
1555 if (n + 1 < layera->cur) {
1557 * More layers above the one that we used to open -
1560 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1561 /* If pushing layers fails close the file */
1568 PerlIO_list_free(aTHX_ layera);
1575 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1577 PERL_ARGS_ASSERT_PERLIO_READ;
1579 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1583 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1585 PERL_ARGS_ASSERT_PERLIO_UNREAD;
1587 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1591 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1593 PERL_ARGS_ASSERT_PERLIO_WRITE;
1595 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1599 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1601 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1605 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1607 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1611 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1615 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1617 if (tab && tab->Flush)
1618 return (*tab->Flush) (aTHX_ f);
1620 return 0; /* If no Flush defined, silently succeed. */
1623 DEBUG_i( PerlIO_debug("Cannot flush f=%p\n", (void*)f) );
1624 SETERRNO(EBADF, SS_IVCHAN);
1630 * Is it good API design to do flush-all on NULL, a potentially
1631 * erroneous input? Maybe some magical value (PerlIO*
1632 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1633 * things on fflush(NULL), but should we be bound by their design
1636 PerlIOl **table = &PL_perlio;
1639 while ((ff = *table)) {
1641 table = (PerlIOl **) (ff++);
1642 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1643 if (ff->next && PerlIO_flush(&(ff->next)) != 0)
1653 PerlIOBase_flush_linebuf(pTHX)
1655 PerlIOl **table = &PL_perlio;
1657 while ((f = *table)) {
1659 table = (PerlIOl **) (f++);
1660 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1662 && (PerlIOBase(&(f->next))->
1663 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1664 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1665 PerlIO_flush(&(f->next));
1672 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1674 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1678 PerlIO_isutf8(PerlIO *f)
1681 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1683 SETERRNO(EBADF, SS_IVCHAN);
1689 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1691 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1695 Perl_PerlIO_error(pTHX_ PerlIO *f)
1697 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1701 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1703 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1707 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1709 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1713 PerlIO_has_base(PerlIO *f)
1715 if (PerlIOValid(f)) {
1716 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1719 return (tab->Get_base != NULL);
1726 PerlIO_fast_gets(PerlIO *f)
1728 if (PerlIOValid(f)) {
1729 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
1730 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1733 return (tab->Set_ptrcnt != NULL);
1741 PerlIO_has_cntptr(PerlIO *f)
1743 if (PerlIOValid(f)) {
1744 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1747 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1754 PerlIO_canset_cnt(PerlIO *f)
1756 if (PerlIOValid(f)) {
1757 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1760 return (tab->Set_ptrcnt != NULL);
1767 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1769 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1773 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1775 /* Note that Get_bufsiz returns a Size_t */
1776 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1780 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1782 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1786 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1788 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1792 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, SSize_t cnt)
1794 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1798 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
1800 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1804 /*--------------------------------------------------------------------------------------*/
1806 * utf8 and raw dummy layers
1810 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1812 PERL_UNUSED_CONTEXT;
1813 PERL_UNUSED_ARG(mode);
1814 PERL_UNUSED_ARG(arg);
1815 if (PerlIOValid(f)) {
1816 if (tab && tab->kind & PERLIO_K_UTF8)
1817 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1819 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1825 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1826 sizeof(PerlIO_funcs),
1829 PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
1849 NULL, /* get_base */
1850 NULL, /* get_bufsiz */
1853 NULL, /* set_ptrcnt */
1856 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1857 sizeof(PerlIO_funcs),
1860 PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
1880 NULL, /* get_base */
1881 NULL, /* get_bufsiz */
1884 NULL, /* set_ptrcnt */
1887 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1888 sizeof(PerlIO_funcs),
1911 NULL, /* get_base */
1912 NULL, /* get_bufsiz */
1915 NULL, /* set_ptrcnt */
1917 /*--------------------------------------------------------------------------------------*/
1918 /*--------------------------------------------------------------------------------------*/
1920 * "Methods" of the "base class"
1924 PerlIOBase_fileno(pTHX_ PerlIO *f)
1926 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1930 PerlIO_modestr(PerlIO * f, char *buf)
1933 if (PerlIOValid(f)) {
1934 const IV flags = PerlIOBase(f)->flags;
1935 if (flags & PERLIO_F_APPEND) {
1937 if (flags & PERLIO_F_CANREAD) {
1941 else if (flags & PERLIO_F_CANREAD) {
1943 if (flags & PERLIO_F_CANWRITE)
1946 else if (flags & PERLIO_F_CANWRITE) {
1948 if (flags & PERLIO_F_CANREAD) {
1952 #ifdef PERLIO_USING_CRLF
1953 if (!(flags & PERLIO_F_CRLF))
1963 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1965 PerlIOl * const l = PerlIOBase(f);
1966 PERL_UNUSED_CONTEXT;
1967 PERL_UNUSED_ARG(arg);
1969 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1970 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1971 if (tab && tab->Set_ptrcnt != NULL)
1972 l->flags |= PERLIO_F_FASTGETS;
1974 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
1978 l->flags |= PERLIO_F_CANREAD;
1981 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1984 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1987 SETERRNO(EINVAL, LIB_INVARG);
1993 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
1996 l->flags &= ~PERLIO_F_CRLF;
1999 l->flags |= PERLIO_F_CRLF;
2002 SETERRNO(EINVAL, LIB_INVARG);
2009 l->flags |= l->next->flags &
2010 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2016 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2017 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2018 l->flags, PerlIO_modestr(f, temp));
2025 PerlIOBase_popped(pTHX_ PerlIO *f)
2027 PERL_UNUSED_CONTEXT;
2033 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2036 * Save the position as current head considers it
2038 const Off_t old = PerlIO_tell(f);
2039 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2040 PerlIOSelf(f, PerlIOBuf)->posn = old;
2041 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2045 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2047 STDCHAR *buf = (STDCHAR *) vbuf;
2049 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2050 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2051 SETERRNO(EBADF, SS_IVCHAN);
2052 PerlIO_save_errno(f);
2058 SSize_t avail = PerlIO_get_cnt(f);
2061 take = (((SSize_t) count >= 0) && ((SSize_t)count < avail)) ? (SSize_t)count : avail;
2063 STDCHAR *ptr = PerlIO_get_ptr(f);
2064 Copy(ptr, buf, take, STDCHAR);
2065 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2068 if (avail == 0) /* set_ptrcnt could have reset avail */
2071 if (count > 0 && avail <= 0) {
2072 if (PerlIO_fill(f) != 0)
2077 return (buf - (STDCHAR *) vbuf);
2083 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2085 PERL_UNUSED_CONTEXT;
2091 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2093 PERL_UNUSED_CONTEXT;
2099 PerlIOBase_close(pTHX_ PerlIO *f)
2102 if (PerlIOValid(f)) {
2103 PerlIO *n = PerlIONext(f);
2104 code = PerlIO_flush(f);
2105 PerlIOBase(f)->flags &=
2106 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2107 while (PerlIOValid(n)) {
2108 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2109 if (tab && tab->Close) {
2110 if ((*tab->Close)(aTHX_ n) != 0)
2115 PerlIOBase(n)->flags &=
2116 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2122 SETERRNO(EBADF, SS_IVCHAN);
2128 PerlIOBase_eof(pTHX_ PerlIO *f)
2130 PERL_UNUSED_CONTEXT;
2131 if (PerlIOValid(f)) {
2132 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2138 PerlIOBase_error(pTHX_ PerlIO *f)
2140 PERL_UNUSED_CONTEXT;
2141 if (PerlIOValid(f)) {
2142 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2148 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2150 if (PerlIOValid(f)) {
2151 PerlIO * const n = PerlIONext(f);
2152 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2159 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2161 PERL_UNUSED_CONTEXT;
2162 if (PerlIOValid(f)) {
2163 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2168 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2174 arg = sv_dup(arg, param);
2175 SvREFCNT_inc_simple_void_NN(arg);
2179 return newSVsv(arg);
2182 PERL_UNUSED_ARG(param);
2183 return newSVsv(arg);
2188 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2190 PerlIO * const nexto = PerlIONext(o);
2191 if (PerlIOValid(nexto)) {
2192 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2193 if (tab && tab->Dup)
2194 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2196 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2199 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2203 DEBUG_i(PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2205 (void*)f, (void*)o, (void*)param) );
2207 arg = (*self->Getarg)(aTHX_ o, param, flags);
2208 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2209 if (f && PerlIOBase(o)->flags & PERLIO_F_UTF8)
2210 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
2216 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2218 /* Must be called with PL_perlio_mutex locked. */
2220 S_more_refcounted_fds(pTHX_ const int new_fd)
2221 PERL_TSA_REQUIRES(PL_perlio_mutex)
2224 const int old_max = PL_perlio_fd_refcnt_size;
2225 const int new_max = 16 + (new_fd & ~15);
2228 #ifndef PERL_IMPLICIT_SYS
2229 PERL_UNUSED_CONTEXT;
2232 DEBUG_i( PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2233 old_max, new_fd, new_max) );
2235 if (new_fd < old_max) {
2239 assert (new_max > new_fd);
2241 /* Use plain realloc() since we need this memory to be really
2242 * global and visible to all the interpreters and/or threads. */
2243 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2247 MUTEX_UNLOCK(&PL_perlio_mutex);
2252 PL_perlio_fd_refcnt_size = new_max;
2253 PL_perlio_fd_refcnt = new_array;
2255 DEBUG_i( PerlIO_debug("Zeroing %p, %d\n",
2256 (void*)(new_array + old_max),
2257 new_max - old_max) );
2259 Zero(new_array + old_max, new_max - old_max, int);
2266 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2267 PERL_UNUSED_CONTEXT;
2271 PerlIOUnix_refcnt_inc(int fd)
2278 MUTEX_LOCK(&PL_perlio_mutex);
2280 if (fd >= PL_perlio_fd_refcnt_size)
2281 S_more_refcounted_fds(aTHX_ fd);
2283 PL_perlio_fd_refcnt[fd]++;
2284 if (PL_perlio_fd_refcnt[fd] <= 0) {
2285 /* diag_listed_as: refcnt_inc: fd %d%s */
2286 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2287 fd, PL_perlio_fd_refcnt[fd]);
2289 DEBUG_i( PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2290 fd, PL_perlio_fd_refcnt[fd]) );
2293 MUTEX_UNLOCK(&PL_perlio_mutex);
2296 /* diag_listed_as: refcnt_inc: fd %d%s */
2297 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2302 PerlIOUnix_refcnt_dec(int fd)
2312 MUTEX_LOCK(&PL_perlio_mutex);
2314 if (fd >= PL_perlio_fd_refcnt_size) {
2315 /* diag_listed_as: refcnt_dec: fd %d%s */
2316 Perl_croak_nocontext("refcnt_dec: fd %d >= refcnt_size %d\n",
2317 fd, PL_perlio_fd_refcnt_size);
2319 if (PL_perlio_fd_refcnt[fd] <= 0) {
2320 /* diag_listed_as: refcnt_dec: fd %d%s */
2321 Perl_croak_nocontext("refcnt_dec: fd %d: %d <= 0\n",
2322 fd, PL_perlio_fd_refcnt[fd]);
2324 cnt = --PL_perlio_fd_refcnt[fd];
2325 DEBUG_i( PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt) );
2327 MUTEX_UNLOCK(&PL_perlio_mutex);
2330 /* diag_listed_as: refcnt_dec: fd %d%s */
2331 Perl_croak_nocontext("refcnt_dec: fd %d < 0\n", fd);
2337 PerlIOUnix_refcnt(int fd)
2344 MUTEX_LOCK(&PL_perlio_mutex);
2346 if (fd >= PL_perlio_fd_refcnt_size) {
2347 /* diag_listed_as: refcnt: fd %d%s */
2348 Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
2349 fd, PL_perlio_fd_refcnt_size);
2351 if (PL_perlio_fd_refcnt[fd] <= 0) {
2352 /* diag_listed_as: refcnt: fd %d%s */
2353 Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
2354 fd, PL_perlio_fd_refcnt[fd]);
2356 cnt = PL_perlio_fd_refcnt[fd];
2358 MUTEX_UNLOCK(&PL_perlio_mutex);
2361 /* diag_listed_as: refcnt: fd %d%s */
2362 Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
2368 PerlIO_cleanup(pTHX)
2372 DEBUG_i( PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX) );
2374 DEBUG_i( PerlIO_debug("Cleanup layers\n") );
2377 /* Raise STDIN..STDERR refcount so we don't close them */
2378 for (i=0; i < 3; i++)
2379 PerlIOUnix_refcnt_inc(i);
2380 PerlIO_cleantable(aTHX_ &PL_perlio);
2381 /* Restore STDIN..STDERR refcount */
2382 for (i=0; i < 3; i++)
2383 PerlIOUnix_refcnt_dec(i);
2385 if (PL_known_layers) {
2386 PerlIO_list_free(aTHX_ PL_known_layers);
2387 PL_known_layers = NULL;
2389 if (PL_def_layerlist) {
2390 PerlIO_list_free(aTHX_ PL_def_layerlist);
2391 PL_def_layerlist = NULL;
2395 void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
2399 /* XXX we can't rely on an interpreter being present at this late stage,
2400 XXX so we can't use a function like PerlLIO_write that relies on one
2401 being present (at least in win32) :-(.
2406 /* By now all filehandles should have been closed, so any
2407 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2409 #define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
2410 #define PERLIO_TEARDOWN_MESSAGE_FD 2
2411 char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
2413 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2414 if (PL_perlio_fd_refcnt[i]) {
2416 my_snprintf(buf, sizeof(buf),
2417 "PerlIO_teardown: fd %d refcnt=%d\n",
2418 i, PL_perlio_fd_refcnt[i]);
2419 PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
2425 /* Not bothering with PL_perlio_mutex since by now
2426 * all the interpreters are gone. */
2427 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2428 && PL_perlio_fd_refcnt) {
2429 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2430 PL_perlio_fd_refcnt = NULL;
2431 PL_perlio_fd_refcnt_size = 0;
2435 /*--------------------------------------------------------------------------------------*/
2437 * Bottom-most level for UNIX-like case
2441 struct _PerlIO base; /* The generic part */
2442 int fd; /* UNIX like file descriptor */
2443 int oflags; /* open/fcntl flags */
2447 S_lockcnt_dec(pTHX_ const void* f)
2449 #ifndef PERL_IMPLICIT_SYS
2450 PERL_UNUSED_CONTEXT;
2452 PerlIO_lockcnt((PerlIO*)f)--;
2456 /* call the signal handler, and if that handler happens to clear
2457 * this handle, free what we can and return true */
2460 S_perlio_async_run(pTHX_ PerlIO* f) {
2462 SAVEDESTRUCTOR_X(S_lockcnt_dec, (void*)f);
2463 PerlIO_lockcnt(f)++;
2465 if ( !(PerlIOBase(f)->flags & PERLIO_F_CLEARED) ) {
2469 /* we've just run some perl-level code that could have done
2470 * anything, including closing the file or clearing this layer.
2471 * If so, free any lower layers that have already been
2472 * cleared, then return an error. */
2473 while (PerlIOValid(f) &&
2474 (PerlIOBase(f)->flags & PERLIO_F_CLEARED))
2476 const PerlIOl *l = *f;
2485 PerlIOUnix_oflags(const char *mode)
2488 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2493 if (*++mode == '+') {
2500 oflags = O_CREAT | O_TRUNC;
2501 if (*++mode == '+') {
2510 oflags = O_CREAT | O_APPEND;
2511 if (*++mode == '+') {
2520 /* XXX TODO: PerlIO_open() test that exercises 'rb' and 'rt'. */
2522 /* Unless O_BINARY is different from O_TEXT, first bit-or:ing one
2523 * of them in, and then bit-and-masking the other them away, won't
2524 * have much of an effect. */
2527 #if O_TEXT != O_BINARY
2534 #if O_TEXT != O_BINARY
2536 oflags &= ~O_BINARY;
2542 /* bit-or:ing with zero O_BINARY would be useless. */
2544 * If neither "t" nor "b" was specified, open the file
2547 * Note that if something else than the zero byte was seen
2548 * here (e.g. bogus mode "rx"), just few lines later we will
2549 * set the errno and invalidate the flags.
2555 if (*mode || oflags == -1) {
2556 SETERRNO(EINVAL, LIB_INVARG);
2563 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2565 PERL_UNUSED_CONTEXT;
2566 return PerlIOSelf(f, PerlIOUnix)->fd;
2570 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2572 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2575 if (PerlLIO_fstat(fd, &st) == 0) {
2576 if (!S_ISREG(st.st_mode)) {
2577 DEBUG_i( PerlIO_debug("%d is not regular file\n",fd) );
2578 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2581 DEBUG_i( PerlIO_debug("%d _is_ a regular file\n",fd) );
2587 PerlIOUnix_refcnt_inc(fd);
2588 PERL_UNUSED_CONTEXT;
2592 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2594 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2595 if (*PerlIONext(f)) {
2596 /* We never call down so do any pending stuff now */
2597 PerlIO_flush(PerlIONext(f));
2599 * XXX could (or should) we retrieve the oflags from the open file
2600 * handle rather than believing the "mode" we are passed in? XXX
2601 * Should the value on NULL mode be 0 or -1?
2603 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2604 mode ? PerlIOUnix_oflags(mode) : -1);
2606 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2612 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2614 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2616 PERL_UNUSED_CONTEXT;
2617 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2619 SETERRNO(ESPIPE, LIB_INVARG);
2621 SETERRNO(EINVAL, LIB_INVARG);
2625 new_loc = PerlLIO_lseek(fd, offset, whence);
2626 if (new_loc == (Off_t) - 1)
2628 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2633 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2634 IV n, const char *mode, int fd, int imode,
2635 int perm, PerlIO *f, int narg, SV **args)
2637 if (PerlIOValid(f)) {
2638 if (PerlIOBase(f)->tab && PerlIOBase(f)->flags & PERLIO_F_OPEN)
2639 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2642 if (*mode == IoTYPE_NUMERIC)
2645 imode = PerlIOUnix_oflags(mode);
2647 perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
2654 const char *path = SvPV_const(*args, len);
2655 if (!IS_SAFE_PATHNAME(path, len, "open"))
2657 fd = PerlLIO_open3(path, imode, perm);
2661 if (*mode == IoTYPE_IMPLICIT)
2664 f = PerlIO_allocate(aTHX);
2666 if (!PerlIOValid(f)) {
2667 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2672 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2673 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2674 if (*mode == IoTYPE_APPEND)
2675 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2682 * FIXME: pop layers ???
2690 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2692 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2694 if (flags & PERLIO_DUP_FD) {
2695 fd = PerlLIO_dup(fd);
2698 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2700 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2701 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2711 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2714 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2716 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2717 #ifdef PERLIO_STD_SPECIAL
2719 return PERLIO_STD_IN(fd, vbuf, count);
2721 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2722 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2726 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2727 if (len >= 0 || errno != EINTR) {
2729 if (errno != EAGAIN) {
2730 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2731 PerlIO_save_errno(f);
2734 else if (len == 0 && count != 0) {
2735 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2741 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2744 NOT_REACHED; /*NOTREACHED*/
2748 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2751 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2753 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2754 #ifdef PERLIO_STD_SPECIAL
2755 if (fd == 1 || fd == 2)
2756 return PERLIO_STD_OUT(fd, vbuf, count);
2759 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2760 if (len >= 0 || errno != EINTR) {
2762 if (errno != EAGAIN) {
2763 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2764 PerlIO_save_errno(f);
2770 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2773 NOT_REACHED; /*NOTREACHED*/
2777 PerlIOUnix_tell(pTHX_ PerlIO *f)
2779 PERL_UNUSED_CONTEXT;
2781 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2786 PerlIOUnix_close(pTHX_ PerlIO *f)
2788 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2790 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2791 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2792 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2797 SETERRNO(EBADF,SS_IVCHAN);
2800 while (PerlLIO_close(fd) != 0) {
2801 if (errno != EINTR) {
2806 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2810 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2815 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2816 sizeof(PerlIO_funcs),
2823 PerlIOBase_binmode, /* binmode */
2833 PerlIOBase_noop_ok, /* flush */
2834 PerlIOBase_noop_fail, /* fill */
2837 PerlIOBase_clearerr,
2838 PerlIOBase_setlinebuf,
2839 NULL, /* get_base */
2840 NULL, /* get_bufsiz */
2843 NULL, /* set_ptrcnt */
2846 /*--------------------------------------------------------------------------------------*/
2851 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2852 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2853 broken by the last second glibc 2.3 fix
2855 #define STDIO_BUFFER_WRITABLE
2860 struct _PerlIO base;
2861 FILE *stdio; /* The stream */
2865 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2867 PERL_UNUSED_CONTEXT;
2869 if (PerlIOValid(f)) {
2870 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2872 return PerlSIO_fileno(s);
2879 PerlIOStdio_mode(const char *mode, char *tmode)
2881 char * const ret = tmode;
2887 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2895 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2898 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2899 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2900 if (toptab == tab) {
2901 /* Top is already stdio - pop self (duplicate) and use original */
2902 PerlIO_pop(aTHX_ f);
2905 const int fd = PerlIO_fileno(n);
2908 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2909 mode = PerlIOStdio_mode(mode, tmode)))) {
2910 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2911 /* We never call down so do any pending stuff now */
2912 PerlIO_flush(PerlIONext(f));
2913 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2920 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2925 PerlIO_importFILE(FILE *stdio, const char *mode)
2931 char filename[FILENAME_MAX];
2936 int fd0 = fileno(stdio);
2939 rc = fldata(stdio,filename,&fileinfo);
2943 if(fileinfo.__dsorgHFS){
2946 /*This MVS dataset , OK!*/
2951 if (!mode || !*mode) {
2952 /* We need to probe to see how we can open the stream
2953 so start with read/write and then try write and read
2954 we dup() so that we can fclose without loosing the fd.
2956 Note that the errno value set by a failing fdopen
2957 varies between stdio implementations.
2959 const int fd = PerlLIO_dup(fd0);
2964 f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2966 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2969 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2972 /* Don't seem to be able to open */
2978 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2979 s = PerlIOSelf(f, PerlIOStdio);
2982 fd0 = fileno(stdio);
2984 PerlIOUnix_refcnt_inc(fd0);
2987 rc = fldata(stdio,filename,&fileinfo);
2989 PerlIOUnix_refcnt_inc(fd0);
2991 if(fileinfo.__dsorgHFS){
2992 PerlIOUnix_refcnt_inc(fd0);
2994 /*This MVS dataset , OK!*/
2997 PerlIOUnix_refcnt_inc(fileno(stdio));
3005 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3006 IV n, const char *mode, int fd, int imode,
3007 int perm, PerlIO *f, int narg, SV **args)
3010 if (PerlIOValid(f)) {
3012 const char * const path = SvPV_const(*args, len);
3013 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
3015 if (!IS_SAFE_PATHNAME(path, len, "open"))
3017 PerlIOUnix_refcnt_dec(fileno(s->stdio));
3018 stdio = PerlSIO_freopen(path, PerlIOStdio_mode(mode, tmode),
3023 PerlIOUnix_refcnt_inc(fileno(s->stdio));
3029 const char * const path = SvPV_const(*args, len);
3030 if (!IS_SAFE_PATHNAME(path, len, "open"))
3032 if (*mode == IoTYPE_NUMERIC) {
3034 fd = PerlLIO_open3(path, imode, perm);
3038 bool appended = FALSE;
3040 /* Cygwin wants its 'b' early. */
3042 mode = PerlIOStdio_mode(mode, tmode);
3044 stdio = PerlSIO_fopen(path, mode);
3047 f = PerlIO_allocate(aTHX);
3050 mode = PerlIOStdio_mode(mode, tmode);
3051 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
3053 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3054 PerlIOUnix_refcnt_inc(fileno(stdio));
3056 PerlSIO_fclose(stdio);
3068 if (*mode == IoTYPE_IMPLICIT) {
3075 stdio = PerlSIO_stdin;
3078 stdio = PerlSIO_stdout;
3081 stdio = PerlSIO_stderr;
3086 stdio = PerlSIO_fdopen(fd, mode =
3087 PerlIOStdio_mode(mode, tmode));
3091 f = PerlIO_allocate(aTHX);
3093 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
3094 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3095 PerlIOUnix_refcnt_inc(fileno(stdio));
3106 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3108 /* This assumes no layers underneath - which is what
3109 happens, but is not how I remember it. NI-S 2001/10/16
3111 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
3112 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
3113 const int fd = fileno(stdio);
3115 if (flags & PERLIO_DUP_FD) {
3116 const int dfd = PerlLIO_dup(fileno(stdio));
3118 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
3123 /* FIXME: To avoid messy error recovery if dup fails
3124 re-use the existing stdio as though flag was not set
3128 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3130 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3132 PerlIOUnix_refcnt_inc(fileno(stdio));
3139 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3141 PERL_UNUSED_CONTEXT;
3143 /* XXX this could use PerlIO_canset_fileno() and
3144 * PerlIO_set_fileno() support from Configure
3146 # if defined(HAS_FDCLOSE)
3147 return fdclose(f, NULL) == 0 ? 1 : 0;
3148 # elif defined(__UCLIBC__)
3149 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3152 # elif defined(__GLIBC__)
3153 /* There may be a better way for GLIBC:
3154 - libio.h defines a flag to not close() on cleanup
3158 # elif defined(__sun)
3161 # elif defined(__hpux)
3165 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3166 your platform does not have special entry try this one.
3167 [For OSF only have confirmation for Tru64 (alpha)
3168 but assume other OSFs will be similar.]
3170 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3173 # elif defined(__FreeBSD__)
3174 /* There may be a better way on FreeBSD:
3175 - we could insert a dummy func in the _close function entry
3176 f->_close = (int (*)(void *)) dummy_close;
3180 # elif defined(__OpenBSD__)
3181 /* There may be a better way on OpenBSD:
3182 - we could insert a dummy func in the _close function entry
3183 f->_close = (int (*)(void *)) dummy_close;
3187 # elif defined(__EMX__)
3188 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3191 # elif defined(__CYGWIN__)
3192 /* There may be a better way on CYGWIN:
3193 - we could insert a dummy func in the _close function entry
3194 f->_close = (int (*)(void *)) dummy_close;
3198 # elif defined(WIN32)
3199 # if defined(UNDER_CE)
3200 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3209 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3210 (which isn't thread safe) instead
3212 # error "Don't know how to set FILE.fileno on your platform"
3220 PerlIOStdio_close(pTHX_ PerlIO *f)
3222 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3228 const int fd = fileno(stdio);
3236 #ifdef SOCKS5_VERSION_NAME
3237 /* Socks lib overrides close() but stdio isn't linked to
3238 that library (though we are) - so we must call close()
3239 on sockets on stdio's behalf.
3242 Sock_size_t optlen = sizeof(int);
3243 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3246 /* Test for -1, as *BSD stdio (at least) on fclose sets the FILE* such
3247 that a subsequent fileno() on it returns -1. Don't want to croak()
3248 from within PerlIOUnix_refcnt_dec() if some buggy caller code is
3249 trying to close an already closed handle which somehow it still has
3250 a reference to. (via.xs, I'm looking at you). */
3251 if (fd != -1 && PerlIOUnix_refcnt_dec(fd) > 0) {
3252 /* File descriptor still in use */
3256 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3257 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3259 if (stdio == stdout || stdio == stderr)
3260 return PerlIO_flush(f);
3263 MUTEX_LOCK(&PL_perlio_mutex);
3264 /* Right. We need a mutex here because for a brief while we
3265 will have the situation that fd is actually closed. Hence if
3266 a second thread were to get into this block, its dup() would
3267 likely return our fd as its dupfd. (after all, it is closed)
3268 Then if we get to the dup2() first, we blat the fd back
3269 (messing up its temporary as a side effect) only for it to
3270 then close its dupfd (== our fd) in its close(dupfd) */
3272 /* There is, of course, a race condition, that any other thread
3273 trying to input/output/whatever on this fd will be stuffed
3274 for the duration of this little manoeuvrer. Perhaps we
3275 should hold an IO mutex for the duration of every IO
3276 operation if we know that invalidate doesn't work on this
3277 platform, but that would suck, and could kill performance.
3279 Except that correctness trumps speed.
3280 Advice from klortho #11912. */
3283 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3284 Use Sarathy's trick from maint-5.6 to invalidate the
3285 fileno slot of the FILE *
3287 result = PerlIO_flush(f);
3289 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3291 dupfd = PerlLIO_dup(fd);
3294 /* Oh cXap. This isn't going to go well. Not sure if we can
3295 recover from here, or if closing this particular FILE *
3296 is a good idea now. */
3301 SAVE_ERRNO; /* This is here only to silence compiler warnings */
3303 result = PerlSIO_fclose(stdio);
3304 /* We treat error from stdio as success if we invalidated
3305 errno may NOT be expected EBADF
3307 if (invalidate && result != 0) {
3311 #ifdef SOCKS5_VERSION_NAME
3312 /* in SOCKS' case, let close() determine return value */
3316 PerlLIO_dup2(dupfd,fd);
3317 PerlLIO_close(dupfd);
3320 MUTEX_UNLOCK(&PL_perlio_mutex);
3327 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3331 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3333 s = PerlIOSelf(f, PerlIOStdio)->stdio;
3336 STDCHAR *buf = (STDCHAR *) vbuf;
3338 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3339 * stdio does not do that for fread()
3341 const int ch = PerlSIO_fgetc(s);
3348 got = PerlSIO_fread(vbuf, 1, count, s);
3349 if (got == 0 && PerlSIO_ferror(s))
3351 if (got >= 0 || errno != EINTR)
3353 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3355 SETERRNO(0,0); /* just in case */
3358 /* Under some circumstances IRIX stdio fgetc() and fread()
3359 * set the errno to ENOENT, which makes no sense according
3360 * to either IRIX or POSIX. [rt.perl.org #123977] */
3361 if (errno == ENOENT) SETERRNO(0,0);
3367 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3370 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3372 #ifdef STDIO_BUFFER_WRITABLE
3373 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3374 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3375 STDCHAR *base = PerlIO_get_base(f);
3376 SSize_t cnt = PerlIO_get_cnt(f);
3377 STDCHAR *ptr = PerlIO_get_ptr(f);
3378 SSize_t avail = ptr - base;
3380 if (avail > count) {
3384 Move(buf-avail,ptr,avail,STDCHAR);
3387 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3388 if (PerlSIO_feof(s) && unread >= 0)
3389 PerlSIO_clearerr(s);
3394 if (PerlIO_has_cntptr(f)) {
3395 /* We can get pointer to buffer but not its base
3396 Do ungetc() but check chars are ending up in the
3399 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3400 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3402 const int ch = *--buf & 0xFF;
3403 if (ungetc(ch,s) != ch) {
3404 /* ungetc did not work */
3407 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3408 /* Did not change pointer as expected */
3409 if (fgetc(s) != EOF) /* get char back again */
3419 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3425 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3428 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3431 got = PerlSIO_fwrite(vbuf, 1, count,
3432 PerlIOSelf(f, PerlIOStdio)->stdio);
3433 if (got >= 0 || errno != EINTR)
3435 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3437 SETERRNO(0,0); /* just in case */
3443 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3445 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3446 PERL_UNUSED_CONTEXT;
3448 return PerlSIO_fseek(stdio, offset, whence);
3452 PerlIOStdio_tell(pTHX_ PerlIO *f)
3454 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3455 PERL_UNUSED_CONTEXT;
3457 return PerlSIO_ftell(stdio);
3461 PerlIOStdio_flush(pTHX_ PerlIO *f)
3463 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3464 PERL_UNUSED_CONTEXT;
3466 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3467 return PerlSIO_fflush(stdio);
3473 * FIXME: This discards ungetc() and pre-read stuff which is not
3474 * right if this is just a "sync" from a layer above Suspect right
3475 * design is to do _this_ but not have layer above flush this
3476 * layer read-to-read
3479 * Not writeable - sync by attempting a seek
3482 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3490 PerlIOStdio_eof(pTHX_ PerlIO *f)
3492 PERL_UNUSED_CONTEXT;
3494 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3498 PerlIOStdio_error(pTHX_ PerlIO *f)
3500 PERL_UNUSED_CONTEXT;
3502 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3506 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3508 PERL_UNUSED_CONTEXT;
3510 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3514 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3516 PERL_UNUSED_CONTEXT;
3518 #ifdef HAS_SETLINEBUF
3519 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3521 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3527 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3529 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3530 return (STDCHAR*)PerlSIO_get_base(stdio);
3534 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3536 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3537 return PerlSIO_get_bufsiz(stdio);
3541 #ifdef USE_STDIO_PTR
3543 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3545 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3546 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3550 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3552 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3553 return PerlSIO_get_cnt(stdio);
3557 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3559 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3561 #ifdef STDIO_PTR_LVALUE
3562 /* This is a long-standing infamous mess. The root of the
3563 * problem is that one cannot know the signedness of char, and
3564 * more precisely the signedness of FILE._ptr. The following
3565 * things have been tried, and they have all failed (across
3566 * different compilers (remember that core needs to to build
3567 * also with c++) and compiler options:
3569 * - casting the RHS to (void*) -- works in *some* places
3570 * - casting the LHS to (void*) -- totally unportable
3572 * So let's try silencing the warning at least for gcc. */
3573 GCC_DIAG_IGNORE(-Wpointer-sign);
3574 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3576 #ifdef STDIO_PTR_LVAL_SETS_CNT
3577 assert(PerlSIO_get_cnt(stdio) == (cnt));
3579 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3581 * Setting ptr _does_ change cnt - we are done
3585 #else /* STDIO_PTR_LVALUE */
3587 #endif /* STDIO_PTR_LVALUE */
3590 * Now (or only) set cnt
3592 #ifdef STDIO_CNT_LVALUE
3593 PerlSIO_set_cnt(stdio, cnt);
3594 #else /* STDIO_CNT_LVALUE */
3595 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3596 PerlSIO_set_ptr(stdio,
3597 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3599 #else /* STDIO_PTR_LVAL_SETS_CNT */
3601 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3602 #endif /* STDIO_CNT_LVALUE */
3609 PerlIOStdio_fill(pTHX_ PerlIO *f)
3613 PERL_UNUSED_CONTEXT;
3614 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3616 stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3619 * fflush()ing read-only streams can cause trouble on some stdio-s
3621 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3622 if (PerlSIO_fflush(stdio) != 0)
3626 c = PerlSIO_fgetc(stdio);
3629 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3631 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3636 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3638 #ifdef STDIO_BUFFER_WRITABLE
3639 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3640 /* Fake ungetc() to the real buffer in case system's ungetc
3643 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3644 SSize_t cnt = PerlSIO_get_cnt(stdio);
3645 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3646 if (ptr == base+1) {
3647 *--ptr = (STDCHAR) c;
3648 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3649 if (PerlSIO_feof(stdio))
3650 PerlSIO_clearerr(stdio);
3656 if (PerlIO_has_cntptr(f)) {
3658 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3664 /* If buffer snoop scheme above fails fall back to
3667 if (PerlSIO_ungetc(c, stdio) != c)
3675 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3676 sizeof(PerlIO_funcs),
3678 sizeof(PerlIOStdio),
3679 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3683 PerlIOBase_binmode, /* binmode */
3697 PerlIOStdio_clearerr,
3698 PerlIOStdio_setlinebuf,
3700 PerlIOStdio_get_base,
3701 PerlIOStdio_get_bufsiz,
3706 #ifdef USE_STDIO_PTR
3707 PerlIOStdio_get_ptr,
3708 PerlIOStdio_get_cnt,
3709 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3710 PerlIOStdio_set_ptrcnt,
3713 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3718 #endif /* USE_STDIO_PTR */
3721 /* Note that calls to PerlIO_exportFILE() are reversed using
3722 * PerlIO_releaseFILE(), not importFILE. */
3724 PerlIO_exportFILE(PerlIO * f, const char *mode)
3728 if (PerlIOValid(f)) {
3730 int fd = PerlIO_fileno(f);
3735 if (!mode || !*mode) {
3736 mode = PerlIO_modestr(f, buf);
3738 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3742 /* De-link any lower layers so new :stdio sticks */
3744 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3745 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3747 PerlIOUnix_refcnt_inc(fileno(stdio));
3748 /* Link previous lower layers under new one */
3752 /* restore layers list */
3762 PerlIO_findFILE(PerlIO *f)
3767 if (l->tab == &PerlIO_stdio) {
3768 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3771 l = *PerlIONext(&l);
3773 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3774 /* However, we're not really exporting a FILE * to someone else (who
3775 becomes responsible for closing it, or calling PerlIO_releaseFILE())
3776 So we need to undo its reference count increase on the underlying file
3777 descriptor. We have to do this, because if the loop above returns you
3778 the FILE *, then *it* didn't increase any reference count. So there's
3779 only one way to be consistent. */
3780 stdio = PerlIO_exportFILE(f, NULL);
3782 const int fd = fileno(stdio);
3784 PerlIOUnix_refcnt_dec(fd);
3789 /* Use this to reverse PerlIO_exportFILE calls. */
3791 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3795 if (l->tab == &PerlIO_stdio) {
3796 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3797 if (s->stdio == f) { /* not in a loop */
3798 const int fd = fileno(f);
3800 PerlIOUnix_refcnt_dec(fd);
3803 PerlIO_pop(aTHX_ p);
3813 /*--------------------------------------------------------------------------------------*/
3815 * perlio buffer layer
3819 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3821 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3822 const int fd = PerlIO_fileno(f);
3823 if (fd >= 0 && PerlLIO_isatty(fd)) {
3824 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3826 if (*PerlIONext(f)) {
3827 const Off_t posn = PerlIO_tell(PerlIONext(f));
3828 if (posn != (Off_t) - 1) {
3832 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3836 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3837 IV n, const char *mode, int fd, int imode, int perm,
3838 PerlIO *f, int narg, SV **args)
3840 if (PerlIOValid(f)) {
3841 PerlIO *next = PerlIONext(f);
3843 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3844 if (tab && tab->Open)
3846 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3848 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3853 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3855 if (*mode == IoTYPE_IMPLICIT) {
3861 if (tab && tab->Open)
3862 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3865 SETERRNO(EINVAL, LIB_INVARG);
3867 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3869 * if push fails during open, open fails. close will pop us.
3874 fd = PerlIO_fileno(f);
3875 if (init && fd == 2) {
3877 * Initial stderr is unbuffered
3879 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3881 #ifdef PERLIO_USING_CRLF
3882 # ifdef PERLIO_IS_BINMODE_FD
3883 if (PERLIO_IS_BINMODE_FD(fd))
3884 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3888 * do something about failing setmode()? --jhi
3890 PerlLIO_setmode(fd, O_BINARY);
3893 /* Enable line buffering with record-oriented regular files
3894 * so we don't introduce an extraneous record boundary when
3895 * the buffer fills up.
3897 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3899 if (PerlLIO_fstat(fd, &st) == 0
3900 && S_ISREG(st.st_mode)
3901 && (st.st_fab_rfm == FAB$C_VAR
3902 || st.st_fab_rfm == FAB$C_VFC)) {
3903 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
3914 * This "flush" is akin to sfio's sync in that it handles files in either
3915 * read or write state. For write state, we put the postponed data through
3916 * the next layers. For read state, we seek() the next layers to the
3917 * offset given by current position in the buffer, and discard the buffer
3918 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3919 * in any case?). Then the pass the stick further in chain.
3922 PerlIOBuf_flush(pTHX_ PerlIO *f)
3924 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3926 PerlIO *n = PerlIONext(f);
3927 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3929 * write() the buffer
3931 const STDCHAR *buf = b->buf;
3932 const STDCHAR *p = buf;
3933 while (p < b->ptr) {
3934 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3938 else if (count < 0 || PerlIO_error(n)) {
3939 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3940 PerlIO_save_errno(f);
3945 b->posn += (p - buf);
3947 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3948 STDCHAR *buf = PerlIO_get_base(f);
3950 * Note position change
3952 b->posn += (b->ptr - buf);
3953 if (b->ptr < b->end) {
3954 /* We did not consume all of it - try and seek downstream to
3955 our logical position
3957 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3958 /* Reload n as some layers may pop themselves on seek */
3959 b->posn = PerlIO_tell(n = PerlIONext(f));
3962 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3963 data is lost for good - so return saying "ok" having undone
3966 b->posn -= (b->ptr - buf);
3971 b->ptr = b->end = b->buf;
3972 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3973 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3974 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3979 /* This discards the content of the buffer after b->ptr, and rereads
3980 * the buffer from the position off in the layer downstream; here off
3981 * is at offset corresponding to b->ptr - b->buf.
3984 PerlIOBuf_fill(pTHX_ PerlIO *f)
3986 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3987 PerlIO *n = PerlIONext(f);
3990 * Down-stream flush is defined not to loose read data so is harmless.
3991 * we would not normally be fill'ing if there was data left in anycase.
3993 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3995 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3996 PerlIOBase_flush_linebuf(aTHX);
3999 PerlIO_get_base(f); /* allocate via vtable */
4001 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
4003 b->ptr = b->end = b->buf;
4005 if (!PerlIOValid(n)) {
4006 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4010 if (PerlIO_fast_gets(n)) {
4012 * Layer below is also buffered. We do _NOT_ want to call its
4013 * ->Read() because that will loop till it gets what we asked for
4014 * which may hang on a pipe etc. Instead take anything it has to
4015 * hand, or ask it to fill _once_.
4017 avail = PerlIO_get_cnt(n);
4019 avail = PerlIO_fill(n);
4021 avail = PerlIO_get_cnt(n);
4023 if (!PerlIO_error(n) && PerlIO_eof(n))
4028 STDCHAR *ptr = PerlIO_get_ptr(n);
4029 const SSize_t cnt = avail;
4030 if (avail > (SSize_t)b->bufsiz)
4032 Copy(ptr, b->buf, avail, STDCHAR);
4033 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
4037 avail = PerlIO_read(n, b->ptr, b->bufsiz);
4041 PerlIOBase(f)->flags |= PERLIO_F_EOF;
4044 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
4045 PerlIO_save_errno(f);
4049 b->end = b->buf + avail;
4050 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4055 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4057 if (PerlIOValid(f)) {
4058 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4061 return PerlIOBase_read(aTHX_ f, vbuf, count);
4067 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4069 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4070 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4073 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4078 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4080 * Buffer is already a read buffer, we can overwrite any chars
4081 * which have been read back to buffer start
4083 avail = (b->ptr - b->buf);
4087 * Buffer is idle, set it up so whole buffer is available for
4091 b->end = b->buf + avail;
4093 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4095 * Buffer extends _back_ from where we are now
4097 b->posn -= b->bufsiz;
4099 if ((SSize_t) count >= 0 && avail > (SSize_t) count) {
4101 * If we have space for more than count, just move count
4109 * In simple stdio-like ungetc() case chars will be already
4112 if (buf != b->ptr) {
4113 Copy(buf, b->ptr, avail, STDCHAR);
4117 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4121 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
4127 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4129 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4130 const STDCHAR *buf = (const STDCHAR *) vbuf;
4131 const STDCHAR *flushptr = buf;
4135 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4137 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4138 if (PerlIO_flush(f) != 0) {
4142 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4143 flushptr = buf + count;
4144 while (flushptr > buf && *(flushptr - 1) != '\n')
4148 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
4149 if ((SSize_t) count >= 0 && (SSize_t) count < avail)
4151 if (flushptr > buf && flushptr <= buf + avail)
4152 avail = flushptr - buf;
4153 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4155 Copy(buf, b->ptr, avail, STDCHAR);
4160 if (buf == flushptr)
4163 if (b->ptr >= (b->buf + b->bufsiz))
4164 if (PerlIO_flush(f) == -1)
4167 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4173 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4176 if ((code = PerlIO_flush(f)) == 0) {
4177 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4178 code = PerlIO_seek(PerlIONext(f), offset, whence);
4180 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4181 b->posn = PerlIO_tell(PerlIONext(f));
4188 PerlIOBuf_tell(pTHX_ PerlIO *f)
4190 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4192 * b->posn is file position where b->buf was read, or will be written
4194 Off_t posn = b->posn;
4195 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
4196 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4198 /* As O_APPEND files are normally shared in some sense it is better
4203 /* when file is NOT shared then this is sufficient */
4204 PerlIO_seek(PerlIONext(f),0, SEEK_END);
4206 posn = b->posn = PerlIO_tell(PerlIONext(f));
4210 * If buffer is valid adjust position by amount in buffer
4212 posn += (b->ptr - b->buf);
4218 PerlIOBuf_popped(pTHX_ PerlIO *f)
4220 const IV code = PerlIOBase_popped(aTHX_ f);
4221 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4222 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4225 b->ptr = b->end = b->buf = NULL;
4226 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4231 PerlIOBuf_close(pTHX_ PerlIO *f)
4233 const IV code = PerlIOBase_close(aTHX_ f);
4234 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4235 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4238 b->ptr = b->end = b->buf = NULL;
4239 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4244 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
4246 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4253 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4255 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4258 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4259 return (b->end - b->ptr);
4264 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4266 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4267 PERL_UNUSED_CONTEXT;
4271 b->bufsiz = PERLIOBUF_DEFAULT_BUFSIZ;
4272 Newxz(b->buf,b->bufsiz, STDCHAR);
4274 b->buf = (STDCHAR *) & b->oneword;
4275 b->bufsiz = sizeof(b->oneword);
4277 b->end = b->ptr = b->buf;
4283 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4285 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4288 return (b->end - b->buf);
4292 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4294 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4296 PERL_UNUSED_ARG(cnt);
4301 assert(PerlIO_get_cnt(f) == cnt);
4302 assert(b->ptr >= b->buf);
4303 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4307 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4309 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4314 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4315 sizeof(PerlIO_funcs),
4318 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4322 PerlIOBase_binmode, /* binmode */
4336 PerlIOBase_clearerr,
4337 PerlIOBase_setlinebuf,
4342 PerlIOBuf_set_ptrcnt,
4345 /*--------------------------------------------------------------------------------------*/
4347 * Temp layer to hold unread chars when cannot do it any other way
4351 PerlIOPending_fill(pTHX_ PerlIO *f)
4354 * Should never happen
4361 PerlIOPending_close(pTHX_ PerlIO *f)
4364 * A tad tricky - flush pops us, then we close new top
4367 return PerlIO_close(f);
4371 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4374 * A tad tricky - flush pops us, then we seek new top
4377 return PerlIO_seek(f, offset, whence);
4382 PerlIOPending_flush(pTHX_ PerlIO *f)
4384 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4385 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4389 PerlIO_pop(aTHX_ f);
4394 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4400 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4405 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4407 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4408 PerlIOl * const l = PerlIOBase(f);
4410 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4411 * etc. get muddled when it changes mid-string when we auto-pop.
4413 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4414 (PerlIOBase(PerlIONext(f))->
4415 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4420 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4422 SSize_t avail = PerlIO_get_cnt(f);
4424 if ((SSize_t) count >= 0 && (SSize_t)count < avail)
4427 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4428 if (got >= 0 && got < (SSize_t)count) {
4429 const SSize_t more =
4430 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4431 if (more >= 0 || got == 0)
4437 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4438 sizeof(PerlIO_funcs),
4441 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4442 PerlIOPending_pushed,
4445 PerlIOBase_binmode, /* binmode */
4454 PerlIOPending_close,
4455 PerlIOPending_flush,
4459 PerlIOBase_clearerr,
4460 PerlIOBase_setlinebuf,
4465 PerlIOPending_set_ptrcnt,
4470 /*--------------------------------------------------------------------------------------*/
4472 * crlf - translation On read translate CR,LF to "\n" we do this by
4473 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4474 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4476 * c->nl points on the first byte of CR LF pair when it is temporarily
4477 * replaced by LF, or to the last CR of the buffer. In the former case
4478 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4479 * that it ends at c->nl; these two cases can be distinguished by
4480 * *c->nl. c->nl is set during _getcnt() call, and unset during
4481 * _unread() and _flush() calls.
4482 * It only matters for read operations.
4486 PerlIOBuf base; /* PerlIOBuf stuff */
4487 STDCHAR *nl; /* Position of crlf we "lied" about in the
4491 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4492 * Otherwise the :crlf layer would always revert back to
4496 S_inherit_utf8_flag(PerlIO *f)
4498 PerlIO *g = PerlIONext(f);
4499 if (PerlIOValid(g)) {
4500 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4501 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4507 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4510 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4511 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4514 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4515 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4516 PerlIOBase(f)->flags);
4520 /* If the old top layer is a CRLF layer, reactivate it (if
4521 * necessary) and remove this new layer from the stack */
4522 PerlIO *g = PerlIONext(f);
4523 if (PerlIOValid(g)) {
4524 PerlIOl *b = PerlIOBase(g);
4525 if (b && b->tab == &PerlIO_crlf) {
4526 if (!(b->flags & PERLIO_F_CRLF))
4527 b->flags |= PERLIO_F_CRLF;
4528 S_inherit_utf8_flag(g);
4529 PerlIO_pop(aTHX_ f);
4534 S_inherit_utf8_flag(f);
4540 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4542 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4543 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4544 *(c->nl) = NATIVE_0xd;
4547 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4548 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4550 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4551 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4553 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4558 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4559 b->end = b->ptr = b->buf + b->bufsiz;
4560 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4561 b->posn -= b->bufsiz;
4563 while (count > 0 && b->ptr > b->buf) {
4564 const int ch = *--buf;
4566 if (b->ptr - 2 >= b->buf) {
4567 *--(b->ptr) = NATIVE_0xa;
4568 *--(b->ptr) = NATIVE_0xd;
4573 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4574 *--(b->ptr) = NATIVE_0xa; /* Works even if 0xa ==
4588 unread += PerlIOBase_unread(aTHX_ f, (const STDCHAR *) vbuf + unread, count);
4593 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4595 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4597 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4600 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4601 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4602 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == NATIVE_0xd)) {
4603 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4605 while (nl < b->end && *nl != NATIVE_0xd)
4607 if (nl < b->end && *nl == NATIVE_0xd) {
4609 if (nl + 1 < b->end) {
4610 if (nl[1] == NATIVE_0xa) {
4616 * Not CR,LF but just CR
4624 * Blast - found CR as last char in buffer
4629 * They may not care, defer work as long as
4633 return (nl - b->ptr);
4637 b->ptr++; /* say we have read it as far as
4638 * flush() is concerned */
4639 b->buf++; /* Leave space in front of buffer */
4640 /* Note as we have moved buf up flush's
4642 will naturally make posn point at CR
4644 b->bufsiz--; /* Buffer is thus smaller */
4645 code = PerlIO_fill(f); /* Fetch some more */
4646 b->bufsiz++; /* Restore size for next time */
4647 b->buf--; /* Point at space */
4648 b->ptr = nl = b->buf; /* Which is what we hand
4650 *nl = NATIVE_0xd; /* Fill in the CR */
4652 goto test; /* fill() call worked */
4654 * CR at EOF - just fall through
4656 /* Should we clear EOF though ??? */
4661 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4667 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4669 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4670 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4676 if (ptr == b->end && *c->nl == NATIVE_0xd) {
4677 /* Deferred CR at end of buffer case - we lied about count */
4690 * Test code - delete when it works ...
4692 IV flags = PerlIOBase(f)->flags;
4693 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4694 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == NATIVE_0xd) {
4695 /* Deferred CR at end of buffer case - we lied about count */
4701 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4702 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4703 flags, c->nl, b->end, cnt);
4710 * They have taken what we lied about
4712 *(c->nl) = NATIVE_0xd;
4718 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4722 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4724 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4725 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4727 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4728 const STDCHAR *buf = (const STDCHAR *) vbuf;
4729 const STDCHAR * const ebuf = buf + count;
4732 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4734 while (buf < ebuf) {
4735 const STDCHAR * const eptr = b->buf + b->bufsiz;
4736 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4737 while (buf < ebuf && b->ptr < eptr) {
4739 if ((b->ptr + 2) > eptr) {
4747 *(b->ptr)++ = NATIVE_0xd; /* CR */
4748 *(b->ptr)++ = NATIVE_0xa; /* LF */
4750 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4757 *(b->ptr)++ = *buf++;
4759 if (b->ptr >= eptr) {
4765 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4767 return (buf - (STDCHAR *) vbuf);
4772 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4774 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4776 *(c->nl) = NATIVE_0xd;
4779 return PerlIOBuf_flush(aTHX_ f);
4783 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4785 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4786 /* In text mode - flush any pending stuff and flip it */
4787 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4788 #ifndef PERLIO_USING_CRLF
4789 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4790 PerlIO_pop(aTHX_ f);
4796 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4797 sizeof(PerlIO_funcs),
4800 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4802 PerlIOBuf_popped, /* popped */
4804 PerlIOCrlf_binmode, /* binmode */
4808 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4809 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4810 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4818 PerlIOBase_clearerr,
4819 PerlIOBase_setlinebuf,
4824 PerlIOCrlf_set_ptrcnt,
4828 Perl_PerlIO_stdin(pTHX)
4831 PerlIO_stdstreams(aTHX);
4833 return (PerlIO*)&PL_perlio[1];
4837 Perl_PerlIO_stdout(pTHX)
4840 PerlIO_stdstreams(aTHX);
4842 return (PerlIO*)&PL_perlio[2];
4846 Perl_PerlIO_stderr(pTHX)
4849 PerlIO_stdstreams(aTHX);
4851 return (PerlIO*)&PL_perlio[3];
4854 /*--------------------------------------------------------------------------------------*/
4857 PerlIO_getname(PerlIO *f, char *buf)
4862 bool exported = FALSE;
4863 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4865 stdio = PerlIO_exportFILE(f,0);
4869 name = fgetname(stdio, buf);
4870 if (exported) PerlIO_releaseFILE(f,stdio);
4875 PERL_UNUSED_ARG(buf);
4876 Perl_croak_nocontext("Don't know how to get file name");
4882 /*--------------------------------------------------------------------------------------*/
4884 * Functions which can be called on any kind of PerlIO implemented in
4888 #undef PerlIO_fdopen
4890 PerlIO_fdopen(int fd, const char *mode)
4893 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4898 PerlIO_open(const char *path, const char *mode)
4901 SV *name = sv_2mortal(newSVpv(path, 0));
4902 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4905 #undef Perlio_reopen
4907 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4910 SV *name = sv_2mortal(newSVpv(path,0));
4911 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4916 PerlIO_getc(PerlIO *f)
4920 if ( 1 == PerlIO_read(f, buf, 1) ) {
4921 return (unsigned char) buf[0];
4926 #undef PerlIO_ungetc
4928 PerlIO_ungetc(PerlIO *f, int ch)
4933 if (PerlIO_unread(f, &buf, 1) == 1)
4941 PerlIO_putc(PerlIO *f, int ch)
4945 return PerlIO_write(f, &buf, 1);
4950 PerlIO_puts(PerlIO *f, const char *s)
4953 return PerlIO_write(f, s, strlen(s));
4956 #undef PerlIO_rewind
4958 PerlIO_rewind(PerlIO *f)
4961 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4965 #undef PerlIO_vprintf
4967 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4976 Perl_va_copy(ap, apc);
4977 sv = vnewSVpvf(fmt, &apc);
4980 sv = vnewSVpvf(fmt, &ap);
4982 s = SvPV_const(sv, len);
4983 wrote = PerlIO_write(f, s, len);
4988 #undef PerlIO_printf
4990 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4995 result = PerlIO_vprintf(f, fmt, ap);
5000 #undef PerlIO_stdoutf
5002 PerlIO_stdoutf(const char *fmt, ...)
5008 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
5013 #undef PerlIO_tmpfile
5015 PerlIO_tmpfile(void)
5022 const int fd = win32_tmpfd();
5024 f = PerlIO_fdopen(fd, "w+b");
5026 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
5028 char tempname[] = "/tmp/PerlIO_XXXXXX";
5029 const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
5031 int old_umask = umask(0177);
5033 * I have no idea how portable mkstemp() is ... NI-S
5035 if (tmpdir && *tmpdir) {
5036 /* if TMPDIR is set and not empty, we try that first */
5037 sv = newSVpv(tmpdir, 0);
5038 sv_catpv(sv, tempname + 4);
5039 fd = mkstemp(SvPVX(sv));
5044 /* else we try /tmp */
5045 fd = mkstemp(tempname);
5050 sv_catpv(sv, tempname + 4);
5051 fd = mkstemp(SvPVX(sv));
5055 f = PerlIO_fdopen(fd, "w+");
5057 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5058 PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
5061 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5062 FILE * const stdio = PerlSIO_tmpfile();
5065 f = PerlIO_fdopen(fileno(stdio), "w+");
5067 # endif /* else HAS_MKSTEMP */
5068 #endif /* else WIN32 */
5073 Perl_PerlIO_save_errno(pTHX_ PerlIO *f)
5075 if (!PerlIOValid(f))
5077 PerlIOBase(f)->err = errno;
5079 PerlIOBase(f)->os_err = vaxc$errno;
5081 PerlIOBase(f)->os_err = Perl_rc;
5082 #elif defined(WIN32)
5083 PerlIOBase(f)->os_err = GetLastError();
5088 Perl_PerlIO_restore_errno(pTHX_ PerlIO *f)
5090 if (!PerlIOValid(f))
5092 SETERRNO(PerlIOBase(f)->err, PerlIOBase(f)->os_err);
5094 Perl_rc = PerlIOBase(f)->os_err);
5095 #elif defined(WIN32)
5096 SetLastError(PerlIOBase(f)->os_err);
5104 /*======================================================================================*/
5106 * Now some functions in terms of above which may be needed even if we are
5107 * not in true PerlIO mode
5110 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5112 const char *direction = NULL;
5115 * Need to supply default layer info from open.pm
5121 if (mode && mode[0] != 'r') {
5122 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
5123 direction = "open>";
5125 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
5126 direction = "open<";
5131 layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
5134 return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;
5139 #undef PerlIO_setpos
5141 PerlIO_setpos(PerlIO *f, SV *pos)
5147 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5148 if(len == sizeof(Off_t))
5149 return PerlIO_seek(f, *posn, SEEK_SET);
5152 SETERRNO(EINVAL, SS_IVCHAN);
5156 #undef PerlIO_setpos
5158 PerlIO_setpos(PerlIO *f, SV *pos)
5164 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5165 if(len == sizeof(Fpos_t))
5166 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5167 return fsetpos64(f, fpos);
5169 return fsetpos(f, fpos);
5173 SETERRNO(EINVAL, SS_IVCHAN);
5179 #undef PerlIO_getpos
5181 PerlIO_getpos(PerlIO *f, SV *pos)
5184 Off_t posn = PerlIO_tell(f);
5185 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5186 return (posn == (Off_t) - 1) ? -1 : 0;
5189 #undef PerlIO_getpos
5191 PerlIO_getpos(PerlIO *f, SV *pos)
5196 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5197 code = fgetpos64(f, &fpos);
5199 code = fgetpos(f, &fpos);
5201 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5206 #if !defined(HAS_VPRINTF)
5209 vprintf(char *pat, char *args)
5211 _doprnt(pat, args, stdout);
5212 return 0; /* wrong, but perl doesn't use the return
5217 vfprintf(FILE *fd, char *pat, char *args)
5219 _doprnt(pat, args, fd);
5220 return 0; /* wrong, but perl doesn't use the return
5226 /* print a failure format string message to stderr and fail exit the process
5227 using only libc without depending on any perl data structures being
5232 Perl_noperl_die(const char* pat, ...)
5235 PERL_ARGS_ASSERT_NOPERL_DIE;
5236 va_start(arglist, pat);
5237 vfprintf(stderr, pat, arglist);
5243 * ex: set ts=8 sts=4 sw=4 et: