3 * Copyright (c) 1996-2006, Nick Ing-Simmons
4 * Copyright (c) 2006, 2007, 2008, 2009, 2010, 2011 Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public License
7 * or the Artistic License, as specified in the README file.
11 * Hour after hour for nearly three weary days he had jogged up and down,
12 * over passes, and through long dales, and across many streams.
14 * [pp.791-792 of _The Lord of the Rings_, V/iii: "The Muster of Rohan"]
17 /* This file contains the functions needed to implement PerlIO, which
18 * is Perl's private replacement for the C stdio library. This is used
19 * by default unless you compile with -Uuseperlio or run with
20 * PERLIO=:stdio (but don't do this unless you know what you're doing)
24 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
25 * at the dispatch tables, even when we do not need it for other reasons.
26 * Invent a dSYS macro to abstract this out
28 #ifdef PERL_IMPLICIT_SYS
34 #define PERLIO_NOT_STDIO 0
36 * This file provides those parts of PerlIO abstraction
37 * which are not #defined in perlio.h.
38 * Which these are depends on various Configure #ifdef's
42 #define PERL_IN_PERLIO_C
45 #ifdef PERL_IMPLICIT_CONTEXT
53 /* Missing proto on LynxOS */
61 #define PerlIO_lockcnt(f) (((PerlIOl*)(f))->head->flags)
63 /* Call the callback or PerlIOBase, and return failure. */
64 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
65 if (PerlIOValid(f)) { \
66 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
67 if (tab && tab->callback) \
68 return (*tab->callback) args; \
70 return PerlIOBase_ ## base args; \
73 SETERRNO(EBADF, SS_IVCHAN); \
76 /* Call the callback or fail, and return failure. */
77 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
78 if (PerlIOValid(f)) { \
79 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
80 if (tab && tab->callback) \
81 return (*tab->callback) args; \
82 SETERRNO(EINVAL, LIB_INVARG); \
85 SETERRNO(EBADF, SS_IVCHAN); \
88 /* Call the callback or PerlIOBase, and be void. */
89 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
90 if (PerlIOValid(f)) { \
91 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
92 if (tab && tab->callback) \
93 (*tab->callback) args; \
95 PerlIOBase_ ## base args; \
98 SETERRNO(EBADF, SS_IVCHAN)
100 /* Call the callback or fail, and be void. */
101 #define Perl_PerlIO_or_fail_void(f, callback, args) \
102 if (PerlIOValid(f)) { \
103 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;\
104 if (tab && tab->callback) \
105 (*tab->callback) args; \
107 SETERRNO(EINVAL, LIB_INVARG); \
110 SETERRNO(EBADF, SS_IVCHAN)
112 #if defined(__osf__) && _XOPEN_SOURCE < 500
113 extern int fseeko(FILE *, off_t, int);
114 extern off_t ftello(FILE *);
117 #define NATIVE_0xd CR_NATIVE
118 #define NATIVE_0xa LF_NATIVE
120 EXTERN_C int perlsio_binmode(FILE *fp, int iotype, int mode);
123 perlsio_binmode(FILE *fp, int iotype, int mode)
126 * This used to be contents of do_binmode in doio.c
130 PERL_UNUSED_ARG(iotype);
132 if (PerlLIO_setmode(fp, mode) != -1) {
134 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
141 # if defined(USEMYBINMODE)
143 # if defined(__CYGWIN__)
144 PERL_UNUSED_ARG(iotype);
146 if (my_binmode(fp, iotype, mode) != FALSE)
152 PERL_UNUSED_ARG(iotype);
153 PERL_UNUSED_ARG(mode);
160 #define O_ACCMODE 3 /* Assume traditional implementation */
164 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
166 const int result = rawmode & O_ACCMODE;
171 ptype = IoTYPE_RDONLY;
174 ptype = IoTYPE_WRONLY;
182 *writing = (result != O_RDONLY);
184 if (result == O_RDONLY) {
188 else if (rawmode & O_APPEND) {
190 if (result != O_WRONLY)
195 if (result == O_WRONLY)
202 #ifdef PERLIO_BINARY_AND_TEXT_DIFFERENT_AND_EFFECTIVE
203 if (rawmode & O_BINARY)
210 #ifndef PERLIO_LAYERS
212 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
214 if (!names || !*names
215 || strEQ(names, ":crlf")
216 || strEQ(names, ":raw")
217 || strEQ(names, ":bytes")
221 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
229 PerlIO_destruct(pTHX)
234 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
236 return perlsio_binmode(fp, iotype, mode);
240 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
242 #if defined(PERL_MICRO) || defined(__SYMBIAN32__)
245 #ifdef PERL_IMPLICIT_SYS
246 return PerlSIO_fdupopen(f);
249 return win32_fdupopen(f);
252 const int fd = PerlLIO_dup(PerlIO_fileno(f));
256 const int omode = djgpp_get_stream_mode(f);
258 const int omode = fcntl(fd, F_GETFL);
260 PerlIO_intmode2str(omode,mode,NULL);
261 /* the r+ is a hack */
262 return PerlIO_fdopen(fd, mode);
267 SETERRNO(EBADF, SS_IVCHAN);
277 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
281 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
282 int imode, int perm, PerlIO *old, int narg, SV **args)
286 Perl_croak(aTHX_ "More than one argument to open");
288 if (*args == &PL_sv_undef)
289 return PerlIO_tmpfile();
292 const char *name = SvPV_const(*args, len);
293 if (!IS_SAFE_PATHNAME(name, len, "open"))
296 if (*mode == IoTYPE_NUMERIC) {
297 fd = PerlLIO_open3(name, imode, perm);
299 return PerlIO_fdopen(fd, mode + 1);
302 return PerlIO_reopen(name, mode, old);
305 return PerlIO_open(name, mode);
310 return PerlIO_fdopen(fd, (char *) mode);
315 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
316 XS(XS_PerlIO__Layer__find)
320 Perl_croak(aTHX_ "Usage class->find(name[,load])");
322 const char * const name = SvPV_nolen_const(ST(1));
323 ST(0) = (strEQ(name, "crlf")
324 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
331 Perl_boot_core_PerlIO(pTHX)
333 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
339 #ifdef PERLIO_IS_STDIO
346 * Does nothing (yet) except force this file to be included in perl
347 * binary. That allows this file to force inclusion of other functions
348 * that may be required by loadable extensions e.g. for
349 * FileHandle::tmpfile
353 #undef PerlIO_tmpfile
360 #else /* PERLIO_IS_STDIO */
362 /*======================================================================================*/
364 * Implement all the PerlIO interface ourselves.
370 PerlIO_debug(const char *fmt, ...)
375 if (!PL_perlio_debug_fd) {
377 PerlProc_getuid() == PerlProc_geteuid() &&
378 PerlProc_getgid() == PerlProc_getegid()) {
379 const char * const s = PerlEnv_getenv("PERLIO_DEBUG");
382 = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
384 PL_perlio_debug_fd = -1;
386 /* tainting or set*id, so ignore the environment, and ensure we
387 skip these tests next time through. */
388 PL_perlio_debug_fd = -1;
391 if (PL_perlio_debug_fd > 0) {
393 const char * const s = CopFILE(PL_curcop);
394 /* Use fixed buffer as sv_catpvf etc. needs SVs */
396 const STRLEN len1 = my_snprintf(buffer, sizeof(buffer), "%.40s:%" IVdf " ", s ? s : "(none)", (IV) CopLINE(PL_curcop));
397 const STRLEN len2 = my_vsnprintf(buffer + len1, sizeof(buffer) - len1, fmt, ap);
398 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, buffer, len1 + len2));
400 const char *s = CopFILE(PL_curcop);
402 SV * const sv = Perl_newSVpvf(aTHX_ "%s:%" IVdf " ", s ? s : "(none)",
403 (IV) CopLINE(PL_curcop));
404 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
406 s = SvPV_const(sv, len);
407 PERL_UNUSED_RESULT(PerlLIO_write(PL_perlio_debug_fd, s, len));
414 /*--------------------------------------------------------------------------------------*/
417 * Inner level routines
420 /* check that the head field of each layer points back to the head */
423 # define VERIFY_HEAD(f) PerlIO_verify_head(aTHX_ f)
425 PerlIO_verify_head(pTHX_ PerlIO *f)
431 p = head = PerlIOBase(f)->head;
434 assert(p->head == head);
435 if (p == (PerlIOl*)f)
442 # define VERIFY_HEAD(f)
447 * Table of pointers to the PerlIO structs (malloc'ed)
449 #define PERLIO_TABLE_SIZE 64
452 PerlIO_init_table(pTHX)
456 Newxz(PL_perlio, PERLIO_TABLE_SIZE, PerlIOl);
462 PerlIO_allocate(pTHX)
466 * Find a free slot in the table, allocating new table as necessary
471 while ((f = *last)) {
473 last = (PerlIOl **) (f);
474 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
475 if (!((++f)->next)) {
476 f->flags = 0; /* lockcnt */
483 Newxz(f,PERLIO_TABLE_SIZE,PerlIOl);
487 *last = (PerlIOl*) f++;
488 f->flags = 0; /* lockcnt */
494 #undef PerlIO_fdupopen
496 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
498 if (PerlIOValid(f)) {
499 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
500 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
502 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
504 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
508 SETERRNO(EBADF, SS_IVCHAN);
514 PerlIO_cleantable(pTHX_ PerlIOl **tablep)
516 PerlIOl * const table = *tablep;
519 PerlIO_cleantable(aTHX_(PerlIOl **) & (table[0]));
520 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
521 PerlIOl * const f = table + i;
523 PerlIO_close(&(f->next));
533 PerlIO_list_alloc(pTHX)
537 Newxz(list, 1, PerlIO_list_t);
543 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
546 if (--list->refcnt == 0) {
549 for (i = 0; i < list->cur; i++)
550 SvREFCNT_dec(list->array[i].arg);
551 Safefree(list->array);
559 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
565 if (list->cur >= list->len) {
568 Renew(list->array, list->len, PerlIO_pair_t);
570 Newx(list->array, list->len, PerlIO_pair_t);
572 p = &(list->array[list->cur++]);
574 if ((p->arg = arg)) {
575 SvREFCNT_inc_simple_void_NN(arg);
580 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
582 PerlIO_list_t *list = NULL;
585 list = PerlIO_list_alloc(aTHX);
586 for (i=0; i < proto->cur; i++) {
587 SV *arg = proto->array[i].arg;
590 arg = sv_dup(arg, param);
592 PERL_UNUSED_ARG(param);
594 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
601 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
604 PerlIOl **table = &proto->Iperlio;
607 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
608 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
609 PerlIO_init_table(aTHX);
610 PerlIO_debug("Clone %p from %p\n",(void*)aTHX,(void*)proto);
611 while ((f = *table)) {
613 table = (PerlIOl **) (f++);
614 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
616 (void) fp_dup(&(f->next), 0, param);
623 PERL_UNUSED_ARG(proto);
624 PERL_UNUSED_ARG(param);
629 PerlIO_destruct(pTHX)
632 PerlIOl **table = &PL_perlio;
635 PerlIO_debug("Destruct %p\n",(void*)aTHX);
637 while ((f = *table)) {
639 table = (PerlIOl **) (f++);
640 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
641 PerlIO *x = &(f->next);
644 if (l->tab && l->tab->kind & PERLIO_K_DESTRUCT) {
645 PerlIO_debug("Destruct popping %s\n", l->tab->name);
659 PerlIO_pop(pTHX_ PerlIO *f)
661 const PerlIOl *l = *f;
664 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f,
665 l->tab ? l->tab->name : "(Null)");
666 if (l->tab && l->tab->Popped) {
668 * If popped returns non-zero do not free its layer structure
669 * it has either done so itself, or it is shared and still in
672 if ((*l->tab->Popped) (aTHX_ f) != 0)
675 if (PerlIO_lockcnt(f)) {
676 /* we're in use; defer freeing the structure */
677 PerlIOBase(f)->flags = PERLIO_F_CLEARED;
678 PerlIOBase(f)->tab = NULL;
688 /* Return as an array the stack of layers on a filehandle. Note that
689 * the stack is returned top-first in the array, and there are three
690 * times as many array elements as there are layers in the stack: the
691 * first element of a layer triplet is the name, the second one is the
692 * arguments, and the third one is the flags. */
695 PerlIO_get_layers(pTHX_ PerlIO *f)
698 AV * const av = newAV();
700 if (PerlIOValid(f)) {
701 PerlIOl *l = PerlIOBase(f);
704 /* There is some collusion in the implementation of
705 XS_PerlIO_get_layers - it knows that name and flags are
706 generated as fresh SVs here, and takes advantage of that to
707 "copy" them by taking a reference. If it changes here, it needs
708 to change there too. */
709 SV * const name = l->tab && l->tab->name ?
710 newSVpv(l->tab->name, 0) : &PL_sv_undef;
711 SV * const arg = l->tab && l->tab->Getarg ?
712 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
715 av_push(av, newSViv((IV)l->flags));
723 /*--------------------------------------------------------------------------------------*/
725 * XS Interface for perl code
729 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
733 if ((SSize_t) len <= 0)
735 for (i = 0; i < PL_known_layers->cur; i++) {
736 PerlIO_funcs * const f = PL_known_layers->array[i].funcs;
737 const STRLEN this_len = strlen(f->name);
738 if (this_len == len && memEQ(f->name, name, len)) {
739 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
743 if (load && PL_subname && PL_def_layerlist
744 && PL_def_layerlist->cur >= 2) {
745 if (PL_in_load_module) {
746 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
749 SV * const pkgsv = newSVpvs("PerlIO");
750 SV * const layer = newSVpvn(name, len);
751 CV * const cv = get_cvs("PerlIO::Layer::NoWarnings", 0);
753 SAVEBOOL(PL_in_load_module);
755 SAVEGENERICSV(PL_warnhook);
756 PL_warnhook = MUTABLE_SV((SvREFCNT_inc_simple_NN(cv)));
758 PL_in_load_module = TRUE;
760 * The two SVs are magically freed by load_module
762 Perl_load_module(aTHX_ 0, pkgsv, NULL, layer, NULL);
764 return PerlIO_find_layer(aTHX_ name, len, 0);
767 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
771 #ifdef USE_ATTRIBUTES_FOR_PERLIO
774 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
777 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
778 PerlIO * const ifp = IoIFP(io);
779 PerlIO * const ofp = IoOFP(io);
780 Perl_warn(aTHX_ "set %" SVf " %p %p %p",
781 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
787 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
790 IO * const io = GvIOn(MUTABLE_GV(SvRV(sv)));
791 PerlIO * const ifp = IoIFP(io);
792 PerlIO * const ofp = IoOFP(io);
793 Perl_warn(aTHX_ "get %" SVf " %p %p %p",
794 SVfARG(sv), (void*)io, (void*)ifp, (void*)ofp);
800 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
802 Perl_warn(aTHX_ "clear %" SVf, SVfARG(sv));
807 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
809 Perl_warn(aTHX_ "free %" SVf, SVfARG(sv));
813 MGVTBL perlio_vtab = {
821 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES); /* prototype to pass -Wmissing-prototypes */
822 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
825 SV * const sv = SvRV(ST(1));
826 AV * const av = newAV();
830 sv_magic(sv, MUTABLE_SV(av), PERL_MAGIC_ext, NULL, 0);
832 mg = mg_find(sv, PERL_MAGIC_ext);
833 mg->mg_virtual = &perlio_vtab;
835 Perl_warn(aTHX_ "attrib %" SVf, SVfARG(sv));
836 for (i = 2; i < items; i++) {
838 const char * const name = SvPV_const(ST(i), len);
839 SV * const layer = PerlIO_find_layer(aTHX_ name, len, 1);
841 av_push(av, SvREFCNT_inc_simple_NN(layer));
852 #endif /* USE_ATTIBUTES_FOR_PERLIO */
855 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
857 HV * const stash = gv_stashpvs("PerlIO::Layer", GV_ADD);
858 SV * const sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
862 XS(XS_PerlIO__Layer__NoWarnings); /* prototype to pass -Wmissing-prototypes */
863 XS(XS_PerlIO__Layer__NoWarnings)
865 /* This is used as a %SIG{__WARN__} handler to suppress warnings
866 during loading of layers.
872 PerlIO_debug("warning:%s\n",SvPV_nolen_const(ST(0)));
876 XS(XS_PerlIO__Layer__find); /* prototype to pass -Wmissing-prototypes */
877 XS(XS_PerlIO__Layer__find)
883 Perl_croak(aTHX_ "Usage class->find(name[,load])");
886 const char * const name = SvPV_const(ST(1), len);
887 const bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
888 PerlIO_funcs * const layer = PerlIO_find_layer(aTHX_ name, len, load);
890 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
897 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
900 if (!PL_known_layers)
901 PL_known_layers = PerlIO_list_alloc(aTHX);
902 PerlIO_list_push(aTHX_ PL_known_layers, tab, NULL);
903 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
907 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
911 const char *s = names;
913 while (isSPACE(*s) || *s == ':')
918 const char *as = NULL;
920 if (!isIDFIRST(*s)) {
922 * Message is consistent with how attribute lists are
923 * passed. Even though this means "foo : : bar" is
924 * seen as an invalid separator character.
926 const char q = ((*s == '\'') ? '"' : '\'');
927 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
928 "Invalid separator character %c%c%c in PerlIO layer specification %s",
930 SETERRNO(EINVAL, LIB_INVARG);
935 } while (isWORDCHAR(*e));
951 * It's a nul terminated string, not allowed
952 * to \ the terminating null. Anything other
953 * character is passed over.
963 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER),
964 "Argument list not closed for PerlIO layer \"%.*s\"",
976 PerlIO_funcs * const layer =
977 PerlIO_find_layer(aTHX_ s, llen, 1);
981 arg = newSVpvn(as, alen);
982 PerlIO_list_push(aTHX_ av, layer,
983 (arg) ? arg : &PL_sv_undef);
987 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"%.*s\"",
1000 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
1003 PERLIO_FUNCS_DECL(*tab) = &PerlIO_perlio;
1004 #ifdef PERLIO_USING_CRLF
1007 if (PerlIO_stdio.Set_ptrcnt)
1008 tab = &PerlIO_stdio;
1010 PerlIO_debug("Pushing %s\n", tab->name);
1011 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1016 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1018 return av->array[n].arg;
1022 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1024 if (n >= 0 && n < av->cur) {
1025 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1026 av->array[n].funcs->name);
1027 return av->array[n].funcs;
1030 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1035 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1037 PERL_UNUSED_ARG(mode);
1038 PERL_UNUSED_ARG(arg);
1039 PERL_UNUSED_ARG(tab);
1040 if (PerlIOValid(f)) {
1042 PerlIO_pop(aTHX_ f);
1048 PERLIO_FUNCS_DECL(PerlIO_remove) = {
1049 sizeof(PerlIO_funcs),
1052 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1072 NULL, /* get_base */
1073 NULL, /* get_bufsiz */
1076 NULL, /* set_ptrcnt */
1080 PerlIO_default_layers(pTHX)
1083 if (!PL_def_layerlist) {
1084 const char * const s = TAINTING_get ? NULL : PerlEnv_getenv("PERLIO");
1085 PERLIO_FUNCS_DECL(*osLayer) = &PerlIO_unix;
1086 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1087 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_unix));
1089 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_win32));
1091 osLayer = &PerlIO_win32;
1094 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_raw));
1095 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_perlio));
1096 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_stdio));
1097 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_crlf));
1098 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_utf8));
1099 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_remove));
1100 PerlIO_define_layer(aTHX_ PERLIO_FUNCS_CAST(&PerlIO_byte));
1101 PerlIO_list_push(aTHX_ PL_def_layerlist,
1102 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1105 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1108 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1111 if (PL_def_layerlist->cur < 2) {
1112 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1114 return PL_def_layerlist;
1118 Perl_boot_core_PerlIO(pTHX)
1120 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1121 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1124 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1125 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1129 PerlIO_default_layer(pTHX_ I32 n)
1132 PerlIO_list_t * const av = PerlIO_default_layers(aTHX);
1135 return PerlIO_layer_fetch(aTHX_ av, n, PERLIO_FUNCS_CAST(&PerlIO_stdio));
1138 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1139 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1142 PerlIO_stdstreams(pTHX)
1146 PerlIO_init_table(aTHX);
1147 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1148 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1149 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1154 PerlIO_push(pTHX_ PerlIO *f, PERLIO_FUNCS_DECL(*tab), const char *mode, SV *arg)
1157 if (tab->fsize != sizeof(PerlIO_funcs)) {
1159 "%s (%"UVuf") does not match %s (%"UVuf")",
1160 "PerlIO layer function table size", (UV)tab->fsize,
1161 "size expected by this perl", (UV)sizeof(PerlIO_funcs) );
1165 if (tab->size < sizeof(PerlIOl)) {
1167 "%s (%"UVuf") smaller than %s (%"UVuf")",
1168 "PerlIO layer instance size", (UV)tab->size,
1169 "size expected by this perl", (UV)sizeof(PerlIOl) );
1171 /* Real layer with a data area */
1174 Newxz(temp, tab->size, char);
1178 l->tab = (PerlIO_funcs*) tab;
1179 l->head = ((PerlIOl*)f)->head;
1181 PerlIO_debug("PerlIO_push f=%p %s %s %p\n",
1182 (void*)f, tab->name,
1183 (mode) ? mode : "(Null)", (void*)arg);
1184 if (*l->tab->Pushed &&
1186 (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1187 PerlIO_pop(aTHX_ f);
1196 /* Pseudo-layer where push does its own stack adjust */
1197 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1198 (mode) ? mode : "(Null)", (void*)arg);
1200 (*tab->Pushed) (aTHX_ f, mode, arg, (PerlIO_funcs*) tab) != 0) {
1208 PerlIOBase_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1209 IV n, const char *mode, int fd, int imode, int perm,
1210 PerlIO *old, int narg, SV **args)
1212 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_layer(aTHX_ 0));
1213 if (tab && tab->Open) {
1214 PerlIO* ret = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm, old, narg, args);
1215 if (ret && PerlIO_push(aTHX_ ret, self, mode, PerlIOArg) == NULL) {
1221 SETERRNO(EINVAL, LIB_INVARG);
1226 PerlIOBase_binmode(pTHX_ PerlIO *f)
1228 if (PerlIOValid(f)) {
1229 /* Is layer suitable for raw stream ? */
1230 if (PerlIOBase(f)->tab && PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1231 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1232 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1235 /* Not suitable - pop it */
1236 PerlIO_pop(aTHX_ f);
1244 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1246 PERL_UNUSED_ARG(mode);
1247 PERL_UNUSED_ARG(arg);
1248 PERL_UNUSED_ARG(tab);
1250 if (PerlIOValid(f)) {
1255 * Strip all layers that are not suitable for a raw stream
1258 while (t && (l = *t)) {
1259 if (l->tab && l->tab->Binmode) {
1260 /* Has a handler - normal case */
1261 if ((*l->tab->Binmode)(aTHX_ t) == 0) {
1263 /* Layer still there - move down a layer */
1272 /* No handler - pop it */
1273 PerlIO_pop(aTHX_ t);
1276 if (PerlIOValid(f)) {
1277 PerlIO_debug(":raw f=%p :%s\n", (void*)f,
1278 PerlIOBase(f)->tab ? PerlIOBase(f)->tab->name : "(Null)");
1286 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1287 PerlIO_list_t *layers, IV n, IV max)
1291 PerlIO_funcs * const tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1293 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1304 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1308 save_scalar(PL_errgv);
1310 PerlIO_list_t * const layers = PerlIO_list_alloc(aTHX);
1311 code = PerlIO_parse_layers(aTHX_ layers, names);
1313 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1315 PerlIO_list_free(aTHX_ layers);
1322 /*--------------------------------------------------------------------------------------*/
1324 * Given the abstraction above the public API functions
1328 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1330 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n", (void*)f,
1331 (PerlIOBase(f) && PerlIOBase(f)->tab) ?
1332 PerlIOBase(f)->tab->name : "(Null)",
1333 iotype, mode, (names) ? names : "(Null)");
1336 /* Do not flush etc. if (e.g.) switching encodings.
1337 if a pushed layer knows it needs to flush lower layers
1338 (for example :unix which is never going to call them)
1339 it can do the flush when it is pushed.
1341 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1344 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1345 #ifdef PERLIO_USING_CRLF
1346 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1347 O_BINARY so we can look for it in mode.
1349 if (!(mode & O_BINARY)) {
1351 /* FIXME?: Looking down the layer stack seems wrong,
1352 but is a way of reaching past (say) an encoding layer
1353 to flip CRLF-ness of the layer(s) below
1356 /* Perhaps we should turn on bottom-most aware layer
1357 e.g. Ilya's idea that UNIX TTY could serve
1359 if (PerlIOBase(f)->tab &&
1360 PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF)
1362 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1363 /* Not in text mode - flush any pending stuff and flip it */
1365 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1367 /* Only need to turn it on in one layer so we are done */
1372 /* Not finding a CRLF aware layer presumably means we are binary
1373 which is not what was requested - so we failed
1374 We _could_ push :crlf layer but so could caller
1379 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1380 So code that used to be here is now in PerlIORaw_pushed().
1382 return PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_raw), NULL, NULL) ? TRUE : FALSE;
1387 PerlIO__close(pTHX_ PerlIO *f)
1389 if (PerlIOValid(f)) {
1390 PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1391 if (tab && tab->Close)
1392 return (*tab->Close)(aTHX_ f);
1394 return PerlIOBase_close(aTHX_ f);
1397 SETERRNO(EBADF, SS_IVCHAN);
1403 Perl_PerlIO_close(pTHX_ PerlIO *f)
1405 const int code = PerlIO__close(aTHX_ f);
1406 while (PerlIOValid(f)) {
1407 PerlIO_pop(aTHX_ f);
1408 if (PerlIO_lockcnt(f))
1409 /* we're in use; the 'pop' deferred freeing the structure */
1416 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1419 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1423 static PerlIO_funcs *
1424 PerlIO_layer_from_ref(pTHX_ SV *sv)
1428 * For any scalar type load the handler which is bundled with perl
1430 if (SvTYPE(sv) < SVt_PVAV && (!isGV_with_GP(sv) || SvFAKE(sv))) {
1431 PerlIO_funcs *f = PerlIO_find_layer(aTHX_ STR_WITH_LEN("scalar"), 1);
1432 /* This isn't supposed to happen, since PerlIO::scalar is core,
1433 * but could happen anyway in smaller installs or with PAR */
1435 /* diag_listed_as: Unknown PerlIO layer "%s" */
1436 Perl_ck_warner(aTHX_ packWARN(WARN_LAYER), "Unknown PerlIO layer \"scalar\"");
1441 * For other types allow if layer is known but don't try and load it
1443 switch (SvTYPE(sv)) {
1445 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Array"), 0);
1447 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Hash"), 0);
1449 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Code"), 0);
1451 return PerlIO_find_layer(aTHX_ STR_WITH_LEN("Glob"), 0);
1458 PerlIO_resolve_layers(pTHX_ const char *layers,
1459 const char *mode, int narg, SV **args)
1462 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1465 PerlIO_stdstreams(aTHX);
1467 SV * const arg = *args;
1469 * If it is a reference but not an object see if we have a handler
1472 if (SvROK(arg) && !sv_isobject(arg)) {
1473 PerlIO_funcs * const handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1475 def = PerlIO_list_alloc(aTHX);
1476 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1480 * Don't fail if handler cannot be found :via(...) etc. may do
1481 * something sensible else we will just stringfy and open
1486 if (!layers || !*layers)
1487 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1488 if (layers && *layers) {
1491 av = PerlIO_clone_list(aTHX_ def, NULL);
1496 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1500 PerlIO_list_free(aTHX_ av);
1512 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1513 int imode, int perm, PerlIO *f, int narg, SV **args)
1516 if (!f && narg == 1 && *args == &PL_sv_undef) {
1517 if ((f = PerlIO_tmpfile())) {
1518 if (!layers || !*layers)
1519 layers = Perl_PerlIO_context_layers(aTHX_ mode);
1520 if (layers && *layers)
1521 PerlIO_apply_layers(aTHX_ f, mode, layers);
1525 PerlIO_list_t *layera;
1527 PerlIO_funcs *tab = NULL;
1528 if (PerlIOValid(f)) {
1530 * This is "reopen" - it is not tested as perl does not use it
1534 layera = PerlIO_list_alloc(aTHX);
1537 if (l->tab && l->tab->Getarg)
1538 arg = (*l->tab->Getarg) (aTHX_ &l, NULL, 0);
1539 PerlIO_list_push(aTHX_ layera, l->tab,
1540 (arg) ? arg : &PL_sv_undef);
1542 l = *PerlIONext(&l);
1546 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1552 * Start at "top" of layer stack
1554 n = layera->cur - 1;
1556 PerlIO_funcs * const t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1565 * Found that layer 'n' can do opens - call it
1567 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1568 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1570 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1571 tab->name, layers ? layers : "(Null)", mode, fd,
1572 imode, perm, (void*)f, narg, (void*)args);
1574 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1577 SETERRNO(EINVAL, LIB_INVARG);
1581 if (n + 1 < layera->cur) {
1583 * More layers above the one that we used to open -
1586 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1587 /* If pushing layers fails close the file */
1594 PerlIO_list_free(aTHX_ layera);
1601 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1603 PERL_ARGS_ASSERT_PERLIO_READ;
1605 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1609 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1611 PERL_ARGS_ASSERT_PERLIO_UNREAD;
1613 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1617 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1619 PERL_ARGS_ASSERT_PERLIO_WRITE;
1621 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1625 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1627 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1631 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1633 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1637 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1642 const PerlIO_funcs *tab = PerlIOBase(f)->tab;
1644 if (tab && tab->Flush)
1645 return (*tab->Flush) (aTHX_ f);
1647 return 0; /* If no Flush defined, silently succeed. */
1650 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1651 SETERRNO(EBADF, SS_IVCHAN);
1657 * Is it good API design to do flush-all on NULL, a potentially
1658 * erroneous input? Maybe some magical value (PerlIO*
1659 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1660 * things on fflush(NULL), but should we be bound by their design
1663 PerlIOl **table = &PL_perlio;
1666 while ((ff = *table)) {
1668 table = (PerlIOl **) (ff++);
1669 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1670 if (ff->next && PerlIO_flush(&(ff->next)) != 0)
1680 PerlIOBase_flush_linebuf(pTHX)
1683 PerlIOl **table = &PL_perlio;
1685 while ((f = *table)) {
1687 table = (PerlIOl **) (f++);
1688 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1690 && (PerlIOBase(&(f->next))->
1691 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1692 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1693 PerlIO_flush(&(f->next));
1700 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1702 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1706 PerlIO_isutf8(PerlIO *f)
1709 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1711 SETERRNO(EBADF, SS_IVCHAN);
1717 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1719 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1723 Perl_PerlIO_error(pTHX_ PerlIO *f)
1725 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1729 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1731 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1735 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1737 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1741 PerlIO_has_base(PerlIO *f)
1743 if (PerlIOValid(f)) {
1744 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1747 return (tab->Get_base != NULL);
1754 PerlIO_fast_gets(PerlIO *f)
1756 if (PerlIOValid(f)) {
1757 if (PerlIOBase(f)->flags & PERLIO_F_FASTGETS) {
1758 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1761 return (tab->Set_ptrcnt != NULL);
1769 PerlIO_has_cntptr(PerlIO *f)
1771 if (PerlIOValid(f)) {
1772 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1775 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1782 PerlIO_canset_cnt(PerlIO *f)
1784 if (PerlIOValid(f)) {
1785 const PerlIO_funcs * const tab = PerlIOBase(f)->tab;
1788 return (tab->Set_ptrcnt != NULL);
1795 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1797 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1801 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1803 /* Note that Get_bufsiz returns a Size_t */
1804 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1808 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1810 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1814 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1816 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1820 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, SSize_t cnt)
1822 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1826 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
1828 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1832 /*--------------------------------------------------------------------------------------*/
1834 * utf8 and raw dummy layers
1838 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1840 PERL_UNUSED_CONTEXT;
1841 PERL_UNUSED_ARG(mode);
1842 PERL_UNUSED_ARG(arg);
1843 if (PerlIOValid(f)) {
1844 if (tab && tab->kind & PERLIO_K_UTF8)
1845 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1847 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1853 PERLIO_FUNCS_DECL(PerlIO_utf8) = {
1854 sizeof(PerlIO_funcs),
1857 PERLIO_K_DUMMY | PERLIO_K_UTF8 | PERLIO_K_MULTIARG,
1877 NULL, /* get_base */
1878 NULL, /* get_bufsiz */
1881 NULL, /* set_ptrcnt */
1884 PERLIO_FUNCS_DECL(PerlIO_byte) = {
1885 sizeof(PerlIO_funcs),
1888 PERLIO_K_DUMMY | PERLIO_K_MULTIARG,
1908 NULL, /* get_base */
1909 NULL, /* get_bufsiz */
1912 NULL, /* set_ptrcnt */
1915 PERLIO_FUNCS_DECL(PerlIO_raw) = {
1916 sizeof(PerlIO_funcs),
1939 NULL, /* get_base */
1940 NULL, /* get_bufsiz */
1943 NULL, /* set_ptrcnt */
1945 /*--------------------------------------------------------------------------------------*/
1946 /*--------------------------------------------------------------------------------------*/
1948 * "Methods" of the "base class"
1952 PerlIOBase_fileno(pTHX_ PerlIO *f)
1954 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1958 PerlIO_modestr(PerlIO * f, char *buf)
1961 if (PerlIOValid(f)) {
1962 const IV flags = PerlIOBase(f)->flags;
1963 if (flags & PERLIO_F_APPEND) {
1965 if (flags & PERLIO_F_CANREAD) {
1969 else if (flags & PERLIO_F_CANREAD) {
1971 if (flags & PERLIO_F_CANWRITE)
1974 else if (flags & PERLIO_F_CANWRITE) {
1976 if (flags & PERLIO_F_CANREAD) {
1980 #ifdef PERLIO_USING_CRLF
1981 if (!(flags & PERLIO_F_CRLF))
1991 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1993 PerlIOl * const l = PerlIOBase(f);
1994 PERL_UNUSED_CONTEXT;
1995 PERL_UNUSED_ARG(arg);
1997 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1998 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1999 if (tab && tab->Set_ptrcnt != NULL)
2000 l->flags |= PERLIO_F_FASTGETS;
2002 if (*mode == IoTYPE_NUMERIC || *mode == IoTYPE_IMPLICIT)
2006 l->flags |= PERLIO_F_CANREAD;
2009 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
2012 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
2015 SETERRNO(EINVAL, LIB_INVARG);
2021 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2024 l->flags &= ~PERLIO_F_CRLF;
2027 l->flags |= PERLIO_F_CRLF;
2030 SETERRNO(EINVAL, LIB_INVARG);
2037 l->flags |= l->next->flags &
2038 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2043 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2044 (void*)f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2045 l->flags, PerlIO_modestr(f, temp));
2051 PerlIOBase_popped(pTHX_ PerlIO *f)
2053 PERL_UNUSED_CONTEXT;
2059 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2062 * Save the position as current head considers it
2064 const Off_t old = PerlIO_tell(f);
2065 PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_pending), "r", NULL);
2066 PerlIOSelf(f, PerlIOBuf)->posn = old;
2067 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
2071 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2073 STDCHAR *buf = (STDCHAR *) vbuf;
2075 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2076 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2077 SETERRNO(EBADF, SS_IVCHAN);
2083 SSize_t avail = PerlIO_get_cnt(f);
2086 take = (((SSize_t) count >= 0) && ((SSize_t)count < avail)) ? (SSize_t)count : avail;
2088 STDCHAR *ptr = PerlIO_get_ptr(f);
2089 Copy(ptr, buf, take, STDCHAR);
2090 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2093 if (avail == 0) /* set_ptrcnt could have reset avail */
2096 if (count > 0 && avail <= 0) {
2097 if (PerlIO_fill(f) != 0)
2102 return (buf - (STDCHAR *) vbuf);
2108 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2110 PERL_UNUSED_CONTEXT;
2116 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2118 PERL_UNUSED_CONTEXT;
2124 PerlIOBase_close(pTHX_ PerlIO *f)
2127 if (PerlIOValid(f)) {
2128 PerlIO *n = PerlIONext(f);
2129 code = PerlIO_flush(f);
2130 PerlIOBase(f)->flags &=
2131 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2132 while (PerlIOValid(n)) {
2133 const PerlIO_funcs * const tab = PerlIOBase(n)->tab;
2134 if (tab && tab->Close) {
2135 if ((*tab->Close)(aTHX_ n) != 0)
2140 PerlIOBase(n)->flags &=
2141 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2147 SETERRNO(EBADF, SS_IVCHAN);
2153 PerlIOBase_eof(pTHX_ PerlIO *f)
2155 PERL_UNUSED_CONTEXT;
2156 if (PerlIOValid(f)) {
2157 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2163 PerlIOBase_error(pTHX_ PerlIO *f)
2165 PERL_UNUSED_CONTEXT;
2166 if (PerlIOValid(f)) {
2167 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2173 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2175 if (PerlIOValid(f)) {
2176 PerlIO * const n = PerlIONext(f);
2177 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2184 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2186 PERL_UNUSED_CONTEXT;
2187 if (PerlIOValid(f)) {
2188 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2193 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2199 arg = sv_dup(arg, param);
2200 SvREFCNT_inc_simple_void_NN(arg);
2204 return newSVsv(arg);
2207 PERL_UNUSED_ARG(param);
2208 return newSVsv(arg);
2213 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2215 PerlIO * const nexto = PerlIONext(o);
2216 if (PerlIOValid(nexto)) {
2217 const PerlIO_funcs * const tab = PerlIOBase(nexto)->tab;
2218 if (tab && tab->Dup)
2219 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2221 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2224 PerlIO_funcs * const self = PerlIOBase(o)->tab;
2228 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2229 self ? self->name : "(Null)",
2230 (void*)f, (void*)o, (void*)param);
2231 if (self && self->Getarg)
2232 arg = (*self->Getarg)(aTHX_ o, param, flags);
2233 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2234 if (f && PerlIOBase(o)->flags & PERLIO_F_UTF8)
2235 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
2241 /* PL_perlio_fd_refcnt[] is in intrpvar.h */
2243 /* Must be called with PL_perlio_mutex locked. */
2245 S_more_refcounted_fds(pTHX_ const int new_fd) {
2247 const int old_max = PL_perlio_fd_refcnt_size;
2248 const int new_max = 16 + (new_fd & ~15);
2251 PerlIO_debug("More fds - old=%d, need %d, new=%d\n",
2252 old_max, new_fd, new_max);
2254 if (new_fd < old_max) {
2258 assert (new_max > new_fd);
2260 /* Use plain realloc() since we need this memory to be really
2261 * global and visible to all the interpreters and/or threads. */
2262 new_array = (int*) realloc(PL_perlio_fd_refcnt, new_max * sizeof(int));
2266 MUTEX_UNLOCK(&PL_perlio_mutex);
2271 PL_perlio_fd_refcnt_size = new_max;
2272 PL_perlio_fd_refcnt = new_array;
2274 PerlIO_debug("Zeroing %p, %d\n",
2275 (void*)(new_array + old_max),
2278 Zero(new_array + old_max, new_max - old_max, int);
2285 /* MUTEX_INIT(&PL_perlio_mutex) is done in PERL_SYS_INIT3(). */
2286 PERL_UNUSED_CONTEXT;
2290 PerlIOUnix_refcnt_inc(int fd)
2297 MUTEX_LOCK(&PL_perlio_mutex);
2299 if (fd >= PL_perlio_fd_refcnt_size)
2300 S_more_refcounted_fds(aTHX_ fd);
2302 PL_perlio_fd_refcnt[fd]++;
2303 if (PL_perlio_fd_refcnt[fd] <= 0) {
2304 /* diag_listed_as: refcnt_inc: fd %d%s */
2305 Perl_croak(aTHX_ "refcnt_inc: fd %d: %d <= 0\n",
2306 fd, PL_perlio_fd_refcnt[fd]);
2308 PerlIO_debug("refcnt_inc: fd %d refcnt=%d\n",
2309 fd, PL_perlio_fd_refcnt[fd]);
2312 MUTEX_UNLOCK(&PL_perlio_mutex);
2315 /* diag_listed_as: refcnt_inc: fd %d%s */
2316 Perl_croak(aTHX_ "refcnt_inc: fd %d < 0\n", fd);
2321 PerlIOUnix_refcnt_dec(int fd)
2327 MUTEX_LOCK(&PL_perlio_mutex);
2329 if (fd >= PL_perlio_fd_refcnt_size) {
2330 /* diag_listed_as: refcnt_dec: fd %d%s */
2331 Perl_croak_nocontext("refcnt_dec: fd %d >= refcnt_size %d\n",
2332 fd, PL_perlio_fd_refcnt_size);
2334 if (PL_perlio_fd_refcnt[fd] <= 0) {
2335 /* diag_listed_as: refcnt_dec: fd %d%s */
2336 Perl_croak_nocontext("refcnt_dec: fd %d: %d <= 0\n",
2337 fd, PL_perlio_fd_refcnt[fd]);
2339 cnt = --PL_perlio_fd_refcnt[fd];
2340 PerlIO_debug("refcnt_dec: fd %d refcnt=%d\n", fd, cnt);
2342 MUTEX_UNLOCK(&PL_perlio_mutex);
2345 /* diag_listed_as: refcnt_dec: fd %d%s */
2346 Perl_croak_nocontext("refcnt_dec: fd %d < 0\n", fd);
2352 PerlIOUnix_refcnt(int fd)
2359 MUTEX_LOCK(&PL_perlio_mutex);
2361 if (fd >= PL_perlio_fd_refcnt_size) {
2362 /* diag_listed_as: refcnt: fd %d%s */
2363 Perl_croak(aTHX_ "refcnt: fd %d >= refcnt_size %d\n",
2364 fd, PL_perlio_fd_refcnt_size);
2366 if (PL_perlio_fd_refcnt[fd] <= 0) {
2367 /* diag_listed_as: refcnt: fd %d%s */
2368 Perl_croak(aTHX_ "refcnt: fd %d: %d <= 0\n",
2369 fd, PL_perlio_fd_refcnt[fd]);
2371 cnt = PL_perlio_fd_refcnt[fd];
2373 MUTEX_UNLOCK(&PL_perlio_mutex);
2376 /* diag_listed_as: refcnt: fd %d%s */
2377 Perl_croak(aTHX_ "refcnt: fd %d < 0\n", fd);
2383 PerlIO_cleanup(pTHX)
2388 PerlIO_debug("Cleanup layers for %p\n",(void*)aTHX);
2390 PerlIO_debug("Cleanup layers\n");
2393 /* Raise STDIN..STDERR refcount so we don't close them */
2394 for (i=0; i < 3; i++)
2395 PerlIOUnix_refcnt_inc(i);
2396 PerlIO_cleantable(aTHX_ &PL_perlio);
2397 /* Restore STDIN..STDERR refcount */
2398 for (i=0; i < 3; i++)
2399 PerlIOUnix_refcnt_dec(i);
2401 if (PL_known_layers) {
2402 PerlIO_list_free(aTHX_ PL_known_layers);
2403 PL_known_layers = NULL;
2405 if (PL_def_layerlist) {
2406 PerlIO_list_free(aTHX_ PL_def_layerlist);
2407 PL_def_layerlist = NULL;
2411 void PerlIO_teardown(void) /* Call only from PERL_SYS_TERM(). */
2415 /* XXX we can't rely on an interpreter being present at this late stage,
2416 XXX so we can't use a function like PerlLIO_write that relies on one
2417 being present (at least in win32) :-(.
2422 /* By now all filehandles should have been closed, so any
2423 * stray (non-STD-)filehandles indicate *possible* (PerlIO)
2425 #define PERLIO_TEARDOWN_MESSAGE_BUF_SIZE 64
2426 #define PERLIO_TEARDOWN_MESSAGE_FD 2
2427 char buf[PERLIO_TEARDOWN_MESSAGE_BUF_SIZE];
2429 for (i = 3; i < PL_perlio_fd_refcnt_size; i++) {
2430 if (PL_perlio_fd_refcnt[i]) {
2432 my_snprintf(buf, sizeof(buf),
2433 "PerlIO_teardown: fd %d refcnt=%d\n",
2434 i, PL_perlio_fd_refcnt[i]);
2435 PerlLIO_write(PERLIO_TEARDOWN_MESSAGE_FD, buf, len);
2441 /* Not bothering with PL_perlio_mutex since by now
2442 * all the interpreters are gone. */
2443 if (PL_perlio_fd_refcnt_size /* Assuming initial size of zero. */
2444 && PL_perlio_fd_refcnt) {
2445 free(PL_perlio_fd_refcnt); /* To match realloc() in S_more_refcounted_fds(). */
2446 PL_perlio_fd_refcnt = NULL;
2447 PL_perlio_fd_refcnt_size = 0;
2451 /*--------------------------------------------------------------------------------------*/
2453 * Bottom-most level for UNIX-like case
2457 struct _PerlIO base; /* The generic part */
2458 int fd; /* UNIX like file descriptor */
2459 int oflags; /* open/fcntl flags */
2463 S_lockcnt_dec(pTHX_ const void* f)
2465 PerlIO_lockcnt((PerlIO*)f)--;
2469 /* call the signal handler, and if that handler happens to clear
2470 * this handle, free what we can and return true */
2473 S_perlio_async_run(pTHX_ PerlIO* f) {
2475 SAVEDESTRUCTOR_X(S_lockcnt_dec, (void*)f);
2476 PerlIO_lockcnt(f)++;
2478 if ( !(PerlIOBase(f)->flags & PERLIO_F_CLEARED) ) {
2482 /* we've just run some perl-level code that could have done
2483 * anything, including closing the file or clearing this layer.
2484 * If so, free any lower layers that have already been
2485 * cleared, then return an error. */
2486 while (PerlIOValid(f) &&
2487 (PerlIOBase(f)->flags & PERLIO_F_CLEARED))
2489 const PerlIOl *l = *f;
2498 PerlIOUnix_oflags(const char *mode)
2501 if (*mode == IoTYPE_IMPLICIT || *mode == IoTYPE_NUMERIC)
2506 if (*++mode == '+') {
2513 oflags = O_CREAT | O_TRUNC;
2514 if (*++mode == '+') {
2523 oflags = O_CREAT | O_APPEND;
2524 if (*++mode == '+') {
2532 #ifdef PERLIO_BINARY_AND_TEXT_DIFFERENT_AND_EFFECTIVE
2538 else if (*mode == 't') {
2540 oflags &= ~O_BINARY;
2545 * If neither "t" nor "b" was specified, open the file
2551 if (*mode || oflags == -1) {
2552 SETERRNO(EINVAL, LIB_INVARG);
2559 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2561 PERL_UNUSED_CONTEXT;
2562 return PerlIOSelf(f, PerlIOUnix)->fd;
2566 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2568 PerlIOUnix * const s = PerlIOSelf(f, PerlIOUnix);
2571 if (PerlLIO_fstat(fd, &st) == 0) {
2572 if (!S_ISREG(st.st_mode)) {
2573 PerlIO_debug("%d is not regular file\n",fd);
2574 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2577 PerlIO_debug("%d _is_ a regular file\n",fd);
2583 PerlIOUnix_refcnt_inc(fd);
2584 PERL_UNUSED_CONTEXT;
2588 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2590 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2591 if (*PerlIONext(f)) {
2592 /* We never call down so do any pending stuff now */
2593 PerlIO_flush(PerlIONext(f));
2595 * XXX could (or should) we retrieve the oflags from the open file
2596 * handle rather than believing the "mode" we are passed in? XXX
2597 * Should the value on NULL mode be 0 or -1?
2599 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2600 mode ? PerlIOUnix_oflags(mode) : -1);
2602 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2608 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2610 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2612 PERL_UNUSED_CONTEXT;
2613 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2615 SETERRNO(ESPIPE, LIB_INVARG);
2617 SETERRNO(EINVAL, LIB_INVARG);
2621 new_loc = PerlLIO_lseek(fd, offset, whence);
2622 if (new_loc == (Off_t) - 1)
2624 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2629 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2630 IV n, const char *mode, int fd, int imode,
2631 int perm, PerlIO *f, int narg, SV **args)
2633 if (PerlIOValid(f)) {
2634 if (PerlIOBase(f)->tab && PerlIOBase(f)->flags & PERLIO_F_OPEN)
2635 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2638 if (*mode == IoTYPE_NUMERIC)
2641 imode = PerlIOUnix_oflags(mode);
2643 perm = 0777; /* preserve RMS defaults, ACL inheritance, etc. */
2650 const char *path = SvPV_const(*args, len);
2651 if (!IS_SAFE_PATHNAME(path, len, "open"))
2653 fd = PerlLIO_open3(path, imode, perm);
2657 if (*mode == IoTYPE_IMPLICIT)
2660 f = PerlIO_allocate(aTHX);
2662 if (!PerlIOValid(f)) {
2663 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2668 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2669 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2670 if (*mode == IoTYPE_APPEND)
2671 PerlIOUnix_seek(aTHX_ f, 0, SEEK_END);
2678 * FIXME: pop layers ???
2686 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2688 const PerlIOUnix * const os = PerlIOSelf(o, PerlIOUnix);
2690 if (flags & PERLIO_DUP_FD) {
2691 fd = PerlLIO_dup(fd);
2694 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2696 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2697 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2707 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2711 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2713 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2714 #ifdef PERLIO_STD_SPECIAL
2716 return PERLIO_STD_IN(fd, vbuf, count);
2718 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD) ||
2719 PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2723 const SSize_t len = PerlLIO_read(fd, vbuf, count);
2724 if (len >= 0 || errno != EINTR) {
2726 if (errno != EAGAIN) {
2727 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2730 else if (len == 0 && count != 0) {
2731 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2737 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2744 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2748 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
2750 fd = PerlIOSelf(f, PerlIOUnix)->fd;
2751 #ifdef PERLIO_STD_SPECIAL
2752 if (fd == 1 || fd == 2)
2753 return PERLIO_STD_OUT(fd, vbuf, count);
2756 const SSize_t len = PerlLIO_write(fd, vbuf, count);
2757 if (len >= 0 || errno != EINTR) {
2759 if (errno != EAGAIN) {
2760 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2766 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2773 PerlIOUnix_tell(pTHX_ PerlIO *f)
2775 PERL_UNUSED_CONTEXT;
2777 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2782 PerlIOUnix_close(pTHX_ PerlIO *f)
2785 const int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2787 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2788 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2789 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2794 SETERRNO(EBADF,SS_IVCHAN);
2797 while (PerlLIO_close(fd) != 0) {
2798 if (errno != EINTR) {
2803 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
2807 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2812 PERLIO_FUNCS_DECL(PerlIO_unix) = {
2813 sizeof(PerlIO_funcs),
2820 PerlIOBase_binmode, /* binmode */
2830 PerlIOBase_noop_ok, /* flush */
2831 PerlIOBase_noop_fail, /* fill */
2834 PerlIOBase_clearerr,
2835 PerlIOBase_setlinebuf,
2836 NULL, /* get_base */
2837 NULL, /* get_bufsiz */
2840 NULL, /* set_ptrcnt */
2843 /*--------------------------------------------------------------------------------------*/
2848 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2849 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2850 broken by the last second glibc 2.3 fix
2852 #define STDIO_BUFFER_WRITABLE
2857 struct _PerlIO base;
2858 FILE *stdio; /* The stream */
2862 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2864 PERL_UNUSED_CONTEXT;
2866 if (PerlIOValid(f)) {
2867 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
2869 return PerlSIO_fileno(s);
2876 PerlIOStdio_mode(const char *mode, char *tmode)
2878 char * const ret = tmode;
2884 #if defined(PERLIO_USING_CRLF) || defined(__CYGWIN__)
2892 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2895 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2896 PerlIO_funcs * const toptab = PerlIOBase(n)->tab;
2897 if (toptab == tab) {
2898 /* Top is already stdio - pop self (duplicate) and use original */
2899 PerlIO_pop(aTHX_ f);
2902 const int fd = PerlIO_fileno(n);
2905 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2906 mode = PerlIOStdio_mode(mode, tmode)))) {
2907 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2908 /* We never call down so do any pending stuff now */
2909 PerlIO_flush(PerlIONext(f));
2910 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2917 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2922 PerlIO_importFILE(FILE *stdio, const char *mode)
2928 int fd0 = fileno(stdio);
2932 if (!mode || !*mode) {
2933 /* We need to probe to see how we can open the stream
2934 so start with read/write and then try write and read
2935 we dup() so that we can fclose without loosing the fd.
2937 Note that the errno value set by a failing fdopen
2938 varies between stdio implementations.
2940 const int fd = PerlLIO_dup(fd0);
2945 f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2947 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2950 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2953 /* Don't seem to be able to open */
2959 if ((f = PerlIO_push(aTHX_(PerlIO_allocate(aTHX)), PERLIO_FUNCS_CAST(&PerlIO_stdio), mode, NULL))) {
2960 s = PerlIOSelf(f, PerlIOStdio);
2962 PerlIOUnix_refcnt_inc(fileno(stdio));
2969 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2970 IV n, const char *mode, int fd, int imode,
2971 int perm, PerlIO *f, int narg, SV **args)
2974 if (PerlIOValid(f)) {
2976 const char * const path = SvPV_const(*args, len);
2977 PerlIOStdio * const s = PerlIOSelf(f, PerlIOStdio);
2979 if (!IS_SAFE_PATHNAME(path, len, "open"))
2981 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2982 stdio = PerlSIO_freopen(path, PerlIOStdio_mode(mode, tmode),
2987 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2993 const char * const path = SvPV_const(*args, len);
2994 if (!IS_SAFE_PATHNAME(path, len, "open"))
2996 if (*mode == IoTYPE_NUMERIC) {
2998 fd = PerlLIO_open3(path, imode, perm);
3002 bool appended = FALSE;
3004 /* Cygwin wants its 'b' early. */
3006 mode = PerlIOStdio_mode(mode, tmode);
3008 stdio = PerlSIO_fopen(path, mode);
3011 f = PerlIO_allocate(aTHX);
3014 mode = PerlIOStdio_mode(mode, tmode);
3015 f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg);
3017 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3018 PerlIOUnix_refcnt_inc(fileno(stdio));
3020 PerlSIO_fclose(stdio);
3032 if (*mode == IoTYPE_IMPLICIT) {
3039 stdio = PerlSIO_stdin;
3042 stdio = PerlSIO_stdout;
3045 stdio = PerlSIO_stderr;
3050 stdio = PerlSIO_fdopen(fd, mode =
3051 PerlIOStdio_mode(mode, tmode));
3055 f = PerlIO_allocate(aTHX);
3057 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
3058 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3059 PerlIOUnix_refcnt_inc(fileno(stdio));
3070 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3072 /* This assumes no layers underneath - which is what
3073 happens, but is not how I remember it. NI-S 2001/10/16
3075 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
3076 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
3077 const int fd = fileno(stdio);
3079 if (flags & PERLIO_DUP_FD) {
3080 const int dfd = PerlLIO_dup(fileno(stdio));
3082 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
3087 /* FIXME: To avoid messy error recovery if dup fails
3088 re-use the existing stdio as though flag was not set
3092 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
3094 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
3096 PerlIOUnix_refcnt_inc(fileno(stdio));
3103 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
3105 PERL_UNUSED_CONTEXT;
3107 /* XXX this could use PerlIO_canset_fileno() and
3108 * PerlIO_set_fileno() support from Configure
3110 # if defined(__UCLIBC__)
3111 /* uClibc must come before glibc because it defines __GLIBC__ as well. */
3114 # elif defined(__GLIBC__)
3115 /* There may be a better way for GLIBC:
3116 - libio.h defines a flag to not close() on cleanup
3120 # elif defined(__sun)
3123 # elif defined(__hpux)
3127 /* Next one ->_file seems to be a reasonable fallback, i.e. if
3128 your platform does not have special entry try this one.
3129 [For OSF only have confirmation for Tru64 (alpha)
3130 but assume other OSFs will be similar.]
3132 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
3135 # elif defined(__FreeBSD__)
3136 /* There may be a better way on FreeBSD:
3137 - we could insert a dummy func in the _close function entry
3138 f->_close = (int (*)(void *)) dummy_close;
3142 # elif defined(__OpenBSD__)
3143 /* There may be a better way on OpenBSD:
3144 - we could insert a dummy func in the _close function entry
3145 f->_close = (int (*)(void *)) dummy_close;
3149 # elif defined(__EMX__)
3150 /* f->_flags &= ~_IOOPEN; */ /* Will leak stream->_buffer */
3153 # elif defined(__CYGWIN__)
3154 /* There may be a better way on CYGWIN:
3155 - we could insert a dummy func in the _close function entry
3156 f->_close = (int (*)(void *)) dummy_close;
3160 # elif defined(WIN32)
3161 # if defined(UNDER_CE)
3162 /* WIN_CE does not have access to FILE internals, it hardly has FILE
3171 /* Sarathy's code did this - we fall back to a dup/dup2 hack
3172 (which isn't thread safe) instead
3174 # error "Don't know how to set FILE.fileno on your platform"
3182 PerlIOStdio_close(pTHX_ PerlIO *f)
3184 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3190 const int fd = fileno(stdio);
3198 #ifdef SOCKS5_VERSION_NAME
3199 /* Socks lib overrides close() but stdio isn't linked to
3200 that library (though we are) - so we must call close()
3201 on sockets on stdio's behalf.
3204 Sock_size_t optlen = sizeof(int);
3205 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0)
3208 /* Test for -1, as *BSD stdio (at least) on fclose sets the FILE* such
3209 that a subsequent fileno() on it returns -1. Don't want to croak()
3210 from within PerlIOUnix_refcnt_dec() if some buggy caller code is
3211 trying to close an already closed handle which somehow it still has
3212 a reference to. (via.xs, I'm looking at you). */
3213 if (fd != -1 && PerlIOUnix_refcnt_dec(fd) > 0) {
3214 /* File descriptor still in use */
3218 /* For STD* handles, don't close stdio, since we shared the FILE *, too. */
3219 if (stdio == stdin) /* Some stdios are buggy fflush-ing inputs */
3221 if (stdio == stdout || stdio == stderr)
3222 return PerlIO_flush(f);
3223 /* Tricky - must fclose(stdio) to free memory but not close(fd)
3224 Use Sarathy's trick from maint-5.6 to invalidate the
3225 fileno slot of the FILE *
3227 result = PerlIO_flush(f);
3229 invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio);
3232 MUTEX_LOCK(&PL_perlio_mutex);
3233 /* Right. We need a mutex here because for a brief while we
3234 will have the situation that fd is actually closed. Hence if
3235 a second thread were to get into this block, its dup() would
3236 likely return our fd as its dupfd. (after all, it is closed)
3237 Then if we get to the dup2() first, we blat the fd back
3238 (messing up its temporary as a side effect) only for it to
3239 then close its dupfd (== our fd) in its close(dupfd) */
3241 /* There is, of course, a race condition, that any other thread
3242 trying to input/output/whatever on this fd will be stuffed
3243 for the duration of this little manoeuvrer. Perhaps we
3244 should hold an IO mutex for the duration of every IO
3245 operation if we know that invalidate doesn't work on this
3246 platform, but that would suck, and could kill performance.
3248 Except that correctness trumps speed.
3249 Advice from klortho #11912. */
3251 dupfd = PerlLIO_dup(fd);
3254 MUTEX_UNLOCK(&PL_perlio_mutex);
3255 /* Oh cXap. This isn't going to go well. Not sure if we can
3256 recover from here, or if closing this particular FILE *
3257 is a good idea now. */
3262 SAVE_ERRNO; /* This is here only to silence compiler warnings */
3264 result = PerlSIO_fclose(stdio);
3265 /* We treat error from stdio as success if we invalidated
3266 errno may NOT be expected EBADF
3268 if (invalidate && result != 0) {
3272 #ifdef SOCKS5_VERSION_NAME
3273 /* in SOCKS' case, let close() determine return value */
3277 PerlLIO_dup2(dupfd,fd);
3278 PerlLIO_close(dupfd);
3280 MUTEX_UNLOCK(&PL_perlio_mutex);
3288 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3293 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3295 s = PerlIOSelf(f, PerlIOStdio)->stdio;
3298 STDCHAR *buf = (STDCHAR *) vbuf;
3300 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3301 * stdio does not do that for fread()
3303 const int ch = PerlSIO_fgetc(s);
3310 got = PerlSIO_fread(vbuf, 1, count, s);
3311 if (got == 0 && PerlSIO_ferror(s))
3313 if (got >= 0 || errno != EINTR)
3315 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3317 SETERRNO(0,0); /* just in case */
3323 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3326 FILE * const s = PerlIOSelf(f, PerlIOStdio)->stdio;
3328 #ifdef STDIO_BUFFER_WRITABLE
3329 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3330 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3331 STDCHAR *base = PerlIO_get_base(f);
3332 SSize_t cnt = PerlIO_get_cnt(f);
3333 STDCHAR *ptr = PerlIO_get_ptr(f);
3334 SSize_t avail = ptr - base;
3336 if (avail > count) {
3340 Move(buf-avail,ptr,avail,STDCHAR);
3343 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3344 if (PerlSIO_feof(s) && unread >= 0)
3345 PerlSIO_clearerr(s);
3350 if (PerlIO_has_cntptr(f)) {
3351 /* We can get pointer to buffer but not its base
3352 Do ungetc() but check chars are ending up in the
3355 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3356 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3358 const int ch = *--buf & 0xFF;
3359 if (ungetc(ch,s) != ch) {
3360 /* ungetc did not work */
3363 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3364 /* Did not change pointer as expected */
3365 if (fgetc(s) != EOF) /* get char back again */
3375 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3381 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3385 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3388 got = PerlSIO_fwrite(vbuf, 1, count,
3389 PerlIOSelf(f, PerlIOStdio)->stdio);
3390 if (got >= 0 || errno != EINTR)
3392 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3394 SETERRNO(0,0); /* just in case */
3400 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3402 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3403 PERL_UNUSED_CONTEXT;
3405 return PerlSIO_fseek(stdio, offset, whence);
3409 PerlIOStdio_tell(pTHX_ PerlIO *f)
3411 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3412 PERL_UNUSED_CONTEXT;
3414 return PerlSIO_ftell(stdio);
3418 PerlIOStdio_flush(pTHX_ PerlIO *f)
3420 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3421 PERL_UNUSED_CONTEXT;
3423 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3424 return PerlSIO_fflush(stdio);
3430 * FIXME: This discards ungetc() and pre-read stuff which is not
3431 * right if this is just a "sync" from a layer above Suspect right
3432 * design is to do _this_ but not have layer above flush this
3433 * layer read-to-read
3436 * Not writeable - sync by attempting a seek
3439 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3447 PerlIOStdio_eof(pTHX_ PerlIO *f)
3449 PERL_UNUSED_CONTEXT;
3451 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3455 PerlIOStdio_error(pTHX_ PerlIO *f)
3457 PERL_UNUSED_CONTEXT;
3459 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3463 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3465 PERL_UNUSED_CONTEXT;
3467 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3471 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3473 PERL_UNUSED_CONTEXT;
3475 #ifdef HAS_SETLINEBUF
3476 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3478 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, NULL, _IOLBF, 0);
3484 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3486 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3487 return (STDCHAR*)PerlSIO_get_base(stdio);
3491 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3493 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3494 return PerlSIO_get_bufsiz(stdio);
3498 #ifdef USE_STDIO_PTR
3500 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3502 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3503 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3507 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3509 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3510 return PerlSIO_get_cnt(stdio);
3514 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3516 FILE * const stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3518 #ifdef STDIO_PTR_LVALUE
3519 PerlSIO_set_ptr(stdio, ptr); /* LHS STDCHAR* cast non-portable */
3520 #ifdef STDIO_PTR_LVAL_SETS_CNT
3521 assert(PerlSIO_get_cnt(stdio) == (cnt));
3523 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3525 * Setting ptr _does_ change cnt - we are done
3529 #else /* STDIO_PTR_LVALUE */
3531 #endif /* STDIO_PTR_LVALUE */
3534 * Now (or only) set cnt
3536 #ifdef STDIO_CNT_LVALUE
3537 PerlSIO_set_cnt(stdio, cnt);
3538 #else /* STDIO_CNT_LVALUE */
3539 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3540 PerlSIO_set_ptr(stdio,
3541 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3543 #else /* STDIO_PTR_LVAL_SETS_CNT */
3545 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3546 #endif /* STDIO_CNT_LVALUE */
3553 PerlIOStdio_fill(pTHX_ PerlIO *f)
3557 PERL_UNUSED_CONTEXT;
3558 if (PerlIO_lockcnt(f)) /* in use: abort ungracefully */
3560 stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3563 * fflush()ing read-only streams can cause trouble on some stdio-s
3565 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3566 if (PerlSIO_fflush(stdio) != 0)
3570 c = PerlSIO_fgetc(stdio);
3573 if (! PerlSIO_ferror(stdio) || errno != EINTR)
3575 if (PL_sig_pending && S_perlio_async_run(aTHX_ f))
3580 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3582 #ifdef STDIO_BUFFER_WRITABLE
3583 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3584 /* Fake ungetc() to the real buffer in case system's ungetc
3587 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3588 SSize_t cnt = PerlSIO_get_cnt(stdio);
3589 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3590 if (ptr == base+1) {
3591 *--ptr = (STDCHAR) c;
3592 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3593 if (PerlSIO_feof(stdio))
3594 PerlSIO_clearerr(stdio);
3600 if (PerlIO_has_cntptr(f)) {
3602 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3609 /* An ungetc()d char is handled separately from the regular
3610 * buffer, so we stuff it in the buffer ourselves.
3611 * Should never get called as should hit code above
3613 *(--((*stdio)->_ptr)) = (unsigned char) c;
3616 /* If buffer snoop scheme above fails fall back to
3619 if (PerlSIO_ungetc(c, stdio) != c)
3627 PERLIO_FUNCS_DECL(PerlIO_stdio) = {
3628 sizeof(PerlIO_funcs),
3630 sizeof(PerlIOStdio),
3631 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3635 PerlIOBase_binmode, /* binmode */
3649 PerlIOStdio_clearerr,
3650 PerlIOStdio_setlinebuf,
3652 PerlIOStdio_get_base,
3653 PerlIOStdio_get_bufsiz,
3658 #ifdef USE_STDIO_PTR
3659 PerlIOStdio_get_ptr,
3660 PerlIOStdio_get_cnt,
3661 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3662 PerlIOStdio_set_ptrcnt,
3665 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3670 #endif /* USE_STDIO_PTR */
3673 /* Note that calls to PerlIO_exportFILE() are reversed using
3674 * PerlIO_releaseFILE(), not importFILE. */
3676 PerlIO_exportFILE(PerlIO * f, const char *mode)
3680 if (PerlIOValid(f)) {
3682 int fd = PerlIO_fileno(f);
3687 if (!mode || !*mode) {
3688 mode = PerlIO_modestr(f, buf);
3690 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3694 /* De-link any lower layers so new :stdio sticks */
3696 if ((f2 = PerlIO_push(aTHX_ f, PERLIO_FUNCS_CAST(&PerlIO_stdio), buf, NULL))) {
3697 PerlIOStdio *s = PerlIOSelf((f = f2), PerlIOStdio);
3699 PerlIOUnix_refcnt_inc(fileno(stdio));
3700 /* Link previous lower layers under new one */
3704 /* restore layers list */
3714 PerlIO_findFILE(PerlIO *f)
3719 if (l->tab == &PerlIO_stdio) {
3720 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3723 l = *PerlIONext(&l);
3725 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3726 /* However, we're not really exporting a FILE * to someone else (who
3727 becomes responsible for closing it, or calling PerlIO_releaseFILE())
3728 So we need to undo its reference count increase on the underlying file
3729 descriptor. We have to do this, because if the loop above returns you
3730 the FILE *, then *it* didn't increase any reference count. So there's
3731 only one way to be consistent. */
3732 stdio = PerlIO_exportFILE(f, NULL);
3734 const int fd = fileno(stdio);
3736 PerlIOUnix_refcnt_dec(fd);
3741 /* Use this to reverse PerlIO_exportFILE calls. */
3743 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3748 if (l->tab == &PerlIO_stdio) {
3749 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3750 if (s->stdio == f) { /* not in a loop */
3751 const int fd = fileno(f);
3753 PerlIOUnix_refcnt_dec(fd);
3756 PerlIO_pop(aTHX_ p);
3766 /*--------------------------------------------------------------------------------------*/
3768 * perlio buffer layer
3772 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3774 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3775 const int fd = PerlIO_fileno(f);
3776 if (fd >= 0 && PerlLIO_isatty(fd)) {
3777 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3779 if (*PerlIONext(f)) {
3780 const Off_t posn = PerlIO_tell(PerlIONext(f));
3781 if (posn != (Off_t) - 1) {
3785 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3789 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3790 IV n, const char *mode, int fd, int imode, int perm,
3791 PerlIO *f, int narg, SV **args)
3793 if (PerlIOValid(f)) {
3794 PerlIO *next = PerlIONext(f);
3796 PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3797 if (tab && tab->Open)
3799 (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3801 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3806 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3808 if (*mode == IoTYPE_IMPLICIT) {
3814 if (tab && tab->Open)
3815 f = (*tab->Open)(aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3818 SETERRNO(EINVAL, LIB_INVARG);
3820 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3822 * if push fails during open, open fails. close will pop us.
3827 fd = PerlIO_fileno(f);
3828 if (init && fd == 2) {
3830 * Initial stderr is unbuffered
3832 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3834 #ifdef PERLIO_USING_CRLF
3835 # ifdef PERLIO_IS_BINMODE_FD
3836 if (PERLIO_IS_BINMODE_FD(fd))
3837 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, NULL);
3841 * do something about failing setmode()? --jhi
3843 PerlLIO_setmode(fd, O_BINARY);
3846 /* Enable line buffering with record-oriented regular files
3847 * so we don't introduce an extraneous record boundary when
3848 * the buffer fills up.
3850 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3852 if (PerlLIO_fstat(fd, &st) == 0
3853 && S_ISREG(st.st_mode)
3854 && (st.st_fab_rfm == FAB$C_VAR
3855 || st.st_fab_rfm == FAB$C_VFC)) {
3856 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
3867 * This "flush" is akin to sfio's sync in that it handles files in either
3868 * read or write state. For write state, we put the postponed data through
3869 * the next layers. For read state, we seek() the next layers to the
3870 * offset given by current position in the buffer, and discard the buffer
3871 * state (XXXX supposed to be for seek()able buffers only, but now it is done
3872 * in any case?). Then the pass the stick further in chain.
3875 PerlIOBuf_flush(pTHX_ PerlIO *f)
3877 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3879 PerlIO *n = PerlIONext(f);
3880 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3882 * write() the buffer
3884 const STDCHAR *buf = b->buf;
3885 const STDCHAR *p = buf;
3886 while (p < b->ptr) {
3887 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3891 else if (count < 0 || PerlIO_error(n)) {
3892 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3897 b->posn += (p - buf);
3899 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3900 STDCHAR *buf = PerlIO_get_base(f);
3902 * Note position change
3904 b->posn += (b->ptr - buf);
3905 if (b->ptr < b->end) {
3906 /* We did not consume all of it - try and seek downstream to
3907 our logical position
3909 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3910 /* Reload n as some layers may pop themselves on seek */
3911 b->posn = PerlIO_tell(n = PerlIONext(f));
3914 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3915 data is lost for good - so return saying "ok" having undone
3918 b->posn -= (b->ptr - buf);
3923 b->ptr = b->end = b->buf;
3924 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3925 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3926 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3931 /* This discards the content of the buffer after b->ptr, and rereads
3932 * the buffer from the position off in the layer downstream; here off
3933 * is at offset corresponding to b->ptr - b->buf.
3936 PerlIOBuf_fill(pTHX_ PerlIO *f)
3938 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
3939 PerlIO *n = PerlIONext(f);
3942 * Down-stream flush is defined not to loose read data so is harmless.
3943 * we would not normally be fill'ing if there was data left in anycase.
3945 if (PerlIO_flush(f) != 0) /* XXXX Check that its seek() succeeded?! */
3947 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3948 PerlIOBase_flush_linebuf(aTHX);
3951 PerlIO_get_base(f); /* allocate via vtable */
3953 assert(b->buf); /* The b->buf does get allocated via the vtable system. */
3955 b->ptr = b->end = b->buf;
3957 if (!PerlIOValid(n)) {
3958 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3962 if (PerlIO_fast_gets(n)) {
3964 * Layer below is also buffered. We do _NOT_ want to call its
3965 * ->Read() because that will loop till it gets what we asked for
3966 * which may hang on a pipe etc. Instead take anything it has to
3967 * hand, or ask it to fill _once_.
3969 avail = PerlIO_get_cnt(n);
3971 avail = PerlIO_fill(n);
3973 avail = PerlIO_get_cnt(n);
3975 if (!PerlIO_error(n) && PerlIO_eof(n))
3980 STDCHAR *ptr = PerlIO_get_ptr(n);
3981 const SSize_t cnt = avail;
3982 if (avail > (SSize_t)b->bufsiz)
3984 Copy(ptr, b->buf, avail, STDCHAR);
3985 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3989 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3993 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3995 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3998 b->end = b->buf + avail;
3999 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4004 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4006 if (PerlIOValid(f)) {
4007 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4010 return PerlIOBase_read(aTHX_ f, vbuf, count);
4016 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4018 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4019 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4022 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4027 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4029 * Buffer is already a read buffer, we can overwrite any chars
4030 * which have been read back to buffer start
4032 avail = (b->ptr - b->buf);
4036 * Buffer is idle, set it up so whole buffer is available for
4040 b->end = b->buf + avail;
4042 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4044 * Buffer extends _back_ from where we are now
4046 b->posn -= b->bufsiz;
4048 if ((SSize_t) count >= 0 && avail > (SSize_t) count) {
4050 * If we have space for more than count, just move count
4058 * In simple stdio-like ungetc() case chars will be already
4061 if (buf != b->ptr) {
4062 Copy(buf, b->ptr, avail, STDCHAR);
4066 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4070 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
4076 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4078 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4079 const STDCHAR *buf = (const STDCHAR *) vbuf;
4080 const STDCHAR *flushptr = buf;
4084 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4086 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4087 if (PerlIO_flush(f) != 0) {
4091 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4092 flushptr = buf + count;
4093 while (flushptr > buf && *(flushptr - 1) != '\n')
4097 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
4098 if ((SSize_t) count >= 0 && (SSize_t) count < avail)
4100 if (flushptr > buf && flushptr <= buf + avail)
4101 avail = flushptr - buf;
4102 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4104 Copy(buf, b->ptr, avail, STDCHAR);
4109 if (buf == flushptr)
4112 if (b->ptr >= (b->buf + b->bufsiz))
4113 if (PerlIO_flush(f) == -1)
4116 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4122 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4125 if ((code = PerlIO_flush(f)) == 0) {
4126 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4127 code = PerlIO_seek(PerlIONext(f), offset, whence);
4129 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4130 b->posn = PerlIO_tell(PerlIONext(f));
4137 PerlIOBuf_tell(pTHX_ PerlIO *f)
4139 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4141 * b->posn is file position where b->buf was read, or will be written
4143 Off_t posn = b->posn;
4144 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
4145 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4147 /* As O_APPEND files are normally shared in some sense it is better
4152 /* when file is NOT shared then this is sufficient */
4153 PerlIO_seek(PerlIONext(f),0, SEEK_END);
4155 posn = b->posn = PerlIO_tell(PerlIONext(f));
4159 * If buffer is valid adjust position by amount in buffer
4161 posn += (b->ptr - b->buf);
4167 PerlIOBuf_popped(pTHX_ PerlIO *f)
4169 const IV code = PerlIOBase_popped(aTHX_ f);
4170 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4171 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4174 b->ptr = b->end = b->buf = NULL;
4175 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4180 PerlIOBuf_close(pTHX_ PerlIO *f)
4182 const IV code = PerlIOBase_close(aTHX_ f);
4183 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4184 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4187 b->ptr = b->end = b->buf = NULL;
4188 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4193 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
4195 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4202 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
4204 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4207 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
4208 return (b->end - b->ptr);
4213 PerlIOBuf_get_base(pTHX_ PerlIO *f)
4215 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4216 PERL_UNUSED_CONTEXT;
4220 b->bufsiz = PERLIOBUF_DEFAULT_BUFSIZ;
4221 Newxz(b->buf,b->bufsiz, STDCHAR);
4223 b->buf = (STDCHAR *) & b->oneword;
4224 b->bufsiz = sizeof(b->oneword);
4226 b->end = b->ptr = b->buf;
4232 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
4234 const PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4237 return (b->end - b->buf);
4241 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4243 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4245 PERL_UNUSED_ARG(cnt);
4250 assert(PerlIO_get_cnt(f) == cnt);
4251 assert(b->ptr >= b->buf);
4252 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4256 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4258 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4263 PERLIO_FUNCS_DECL(PerlIO_perlio) = {
4264 sizeof(PerlIO_funcs),
4267 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4271 PerlIOBase_binmode, /* binmode */
4285 PerlIOBase_clearerr,
4286 PerlIOBase_setlinebuf,
4291 PerlIOBuf_set_ptrcnt,
4294 /*--------------------------------------------------------------------------------------*/
4296 * Temp layer to hold unread chars when cannot do it any other way
4300 PerlIOPending_fill(pTHX_ PerlIO *f)
4303 * Should never happen
4310 PerlIOPending_close(pTHX_ PerlIO *f)
4313 * A tad tricky - flush pops us, then we close new top
4316 return PerlIO_close(f);
4320 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
4323 * A tad tricky - flush pops us, then we seek new top
4326 return PerlIO_seek(f, offset, whence);
4331 PerlIOPending_flush(pTHX_ PerlIO *f)
4333 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4334 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
4338 PerlIO_pop(aTHX_ f);
4343 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4349 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4354 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4356 const IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4357 PerlIOl * const l = PerlIOBase(f);
4359 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4360 * etc. get muddled when it changes mid-string when we auto-pop.
4362 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4363 (PerlIOBase(PerlIONext(f))->
4364 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4369 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4371 SSize_t avail = PerlIO_get_cnt(f);
4373 if ((SSize_t) count >= 0 && (SSize_t)count < avail)
4376 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4377 if (got >= 0 && got < (SSize_t)count) {
4378 const SSize_t more =
4379 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4380 if (more >= 0 || got == 0)
4386 PERLIO_FUNCS_DECL(PerlIO_pending) = {
4387 sizeof(PerlIO_funcs),
4390 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4391 PerlIOPending_pushed,
4394 PerlIOBase_binmode, /* binmode */
4403 PerlIOPending_close,
4404 PerlIOPending_flush,
4408 PerlIOBase_clearerr,
4409 PerlIOBase_setlinebuf,
4414 PerlIOPending_set_ptrcnt,
4419 /*--------------------------------------------------------------------------------------*/
4421 * crlf - translation On read translate CR,LF to "\n" we do this by
4422 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4423 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4425 * c->nl points on the first byte of CR LF pair when it is temporarily
4426 * replaced by LF, or to the last CR of the buffer. In the former case
4427 * the caller thinks that the buffer ends at c->nl + 1, in the latter
4428 * that it ends at c->nl; these two cases can be distinguished by
4429 * *c->nl. c->nl is set during _getcnt() call, and unset during
4430 * _unread() and _flush() calls.
4431 * It only matters for read operations.
4435 PerlIOBuf base; /* PerlIOBuf stuff */
4436 STDCHAR *nl; /* Position of crlf we "lied" about in the
4440 /* Inherit the PERLIO_F_UTF8 flag from previous layer.
4441 * Otherwise the :crlf layer would always revert back to
4445 S_inherit_utf8_flag(PerlIO *f)
4447 PerlIO *g = PerlIONext(f);
4448 if (PerlIOValid(g)) {
4449 if (PerlIOBase(g)->flags & PERLIO_F_UTF8) {
4450 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
4456 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4459 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4460 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4462 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4463 (void*)f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4464 PerlIOBase(f)->flags);
4467 /* If the old top layer is a CRLF layer, reactivate it (if
4468 * necessary) and remove this new layer from the stack */
4469 PerlIO *g = PerlIONext(f);
4470 if (PerlIOValid(g)) {
4471 PerlIOl *b = PerlIOBase(g);
4472 if (b && b->tab == &PerlIO_crlf) {
4473 if (!(b->flags & PERLIO_F_CRLF))
4474 b->flags |= PERLIO_F_CRLF;
4475 S_inherit_utf8_flag(g);
4476 PerlIO_pop(aTHX_ f);
4481 S_inherit_utf8_flag(f);
4487 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4489 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4490 if (c->nl) { /* XXXX Shouldn't it be done only if b->ptr > c->nl? */
4491 *(c->nl) = NATIVE_0xd;
4494 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4495 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4497 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4498 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4500 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4505 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4506 b->end = b->ptr = b->buf + b->bufsiz;
4507 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4508 b->posn -= b->bufsiz;
4510 while (count > 0 && b->ptr > b->buf) {
4511 const int ch = *--buf;
4513 if (b->ptr - 2 >= b->buf) {
4514 *--(b->ptr) = NATIVE_0xa;
4515 *--(b->ptr) = NATIVE_0xd;
4520 /* If b->ptr - 1 == b->buf, we are undoing reading 0xa */
4521 *--(b->ptr) = NATIVE_0xa; /* Works even if 0xa ==
4535 unread += PerlIOBase_unread(aTHX_ f, (const STDCHAR *) vbuf + unread, count);
4540 /* XXXX This code assumes that buffer size >=2, but does not check it... */
4542 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4544 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4547 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4548 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4549 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == NATIVE_0xd)) {
4550 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4552 while (nl < b->end && *nl != NATIVE_0xd)
4554 if (nl < b->end && *nl == NATIVE_0xd) {
4556 if (nl + 1 < b->end) {
4557 if (nl[1] == NATIVE_0xa) {
4563 * Not CR,LF but just CR
4571 * Blast - found CR as last char in buffer
4576 * They may not care, defer work as long as
4580 return (nl - b->ptr);
4584 b->ptr++; /* say we have read it as far as
4585 * flush() is concerned */
4586 b->buf++; /* Leave space in front of buffer */
4587 /* Note as we have moved buf up flush's
4589 will naturally make posn point at CR
4591 b->bufsiz--; /* Buffer is thus smaller */
4592 code = PerlIO_fill(f); /* Fetch some more */
4593 b->bufsiz++; /* Restore size for next time */
4594 b->buf--; /* Point at space */
4595 b->ptr = nl = b->buf; /* Which is what we hand
4597 *nl = NATIVE_0xd; /* Fill in the CR */
4599 goto test; /* fill() call worked */
4601 * CR at EOF - just fall through
4603 /* Should we clear EOF though ??? */
4608 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4614 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4616 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4617 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4623 if (ptr == b->end && *c->nl == NATIVE_0xd) {
4624 /* Deferred CR at end of buffer case - we lied about count */
4637 * Test code - delete when it works ...
4639 IV flags = PerlIOBase(f)->flags;
4640 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4641 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == NATIVE_0xd) {
4642 /* Deferred CR at end of buffer case - we lied about count */
4648 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4649 " nl=%p e=%p for %d", (void*)ptr, (void*)chk,
4650 flags, c->nl, b->end, cnt);
4657 * They have taken what we lied about
4659 *(c->nl) = NATIVE_0xd;
4665 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4669 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4671 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4672 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4674 PerlIOBuf * const b = PerlIOSelf(f, PerlIOBuf);
4675 const STDCHAR *buf = (const STDCHAR *) vbuf;
4676 const STDCHAR * const ebuf = buf + count;
4679 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4681 while (buf < ebuf) {
4682 const STDCHAR * const eptr = b->buf + b->bufsiz;
4683 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4684 while (buf < ebuf && b->ptr < eptr) {
4686 if ((b->ptr + 2) > eptr) {
4694 *(b->ptr)++ = NATIVE_0xd; /* CR */
4695 *(b->ptr)++ = NATIVE_0xa; /* LF */
4697 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4704 *(b->ptr)++ = *buf++;
4706 if (b->ptr >= eptr) {
4712 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4714 return (buf - (STDCHAR *) vbuf);
4719 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4721 PerlIOCrlf * const c = PerlIOSelf(f, PerlIOCrlf);
4723 *(c->nl) = NATIVE_0xd;
4726 return PerlIOBuf_flush(aTHX_ f);
4730 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4732 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4733 /* In text mode - flush any pending stuff and flip it */
4734 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4735 #ifndef PERLIO_USING_CRLF
4736 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4737 PerlIO_pop(aTHX_ f);
4743 PERLIO_FUNCS_DECL(PerlIO_crlf) = {
4744 sizeof(PerlIO_funcs),
4747 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4749 PerlIOBuf_popped, /* popped */
4751 PerlIOCrlf_binmode, /* binmode */
4755 PerlIOBuf_read, /* generic read works with ptr/cnt lies */
4756 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4757 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4765 PerlIOBase_clearerr,
4766 PerlIOBase_setlinebuf,
4771 PerlIOCrlf_set_ptrcnt,
4775 Perl_PerlIO_stdin(pTHX)
4779 PerlIO_stdstreams(aTHX);
4781 return (PerlIO*)&PL_perlio[1];
4785 Perl_PerlIO_stdout(pTHX)
4789 PerlIO_stdstreams(aTHX);
4791 return (PerlIO*)&PL_perlio[2];
4795 Perl_PerlIO_stderr(pTHX)
4799 PerlIO_stdstreams(aTHX);
4801 return (PerlIO*)&PL_perlio[3];
4804 /*--------------------------------------------------------------------------------------*/
4807 PerlIO_getname(PerlIO *f, char *buf)
4812 bool exported = FALSE;
4813 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4815 stdio = PerlIO_exportFILE(f,0);
4819 name = fgetname(stdio, buf);
4820 if (exported) PerlIO_releaseFILE(f,stdio);
4825 PERL_UNUSED_ARG(buf);
4826 Perl_croak_nocontext("Don't know how to get file name");
4832 /*--------------------------------------------------------------------------------------*/
4834 * Functions which can be called on any kind of PerlIO implemented in
4838 #undef PerlIO_fdopen
4840 PerlIO_fdopen(int fd, const char *mode)
4843 return PerlIO_openn(aTHX_ NULL, mode, fd, 0, 0, NULL, 0, NULL);
4848 PerlIO_open(const char *path, const char *mode)
4851 SV *name = sv_2mortal(newSVpv(path, 0));
4852 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, NULL, 1, &name);
4855 #undef Perlio_reopen
4857 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4860 SV *name = sv_2mortal(newSVpv(path,0));
4861 return PerlIO_openn(aTHX_ NULL, mode, -1, 0, 0, f, 1, &name);
4866 PerlIO_getc(PerlIO *f)
4870 if ( 1 == PerlIO_read(f, buf, 1) ) {
4871 return (unsigned char) buf[0];
4876 #undef PerlIO_ungetc
4878 PerlIO_ungetc(PerlIO *f, int ch)
4883 if (PerlIO_unread(f, &buf, 1) == 1)
4891 PerlIO_putc(PerlIO *f, int ch)
4895 return PerlIO_write(f, &buf, 1);
4900 PerlIO_puts(PerlIO *f, const char *s)
4903 return PerlIO_write(f, s, strlen(s));
4906 #undef PerlIO_rewind
4908 PerlIO_rewind(PerlIO *f)
4911 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4915 #undef PerlIO_vprintf
4917 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4926 Perl_va_copy(ap, apc);
4927 sv = vnewSVpvf(fmt, &apc);
4930 sv = vnewSVpvf(fmt, &ap);
4932 s = SvPV_const(sv, len);
4933 wrote = PerlIO_write(f, s, len);
4938 #undef PerlIO_printf
4940 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4945 result = PerlIO_vprintf(f, fmt, ap);
4950 #undef PerlIO_stdoutf
4952 PerlIO_stdoutf(const char *fmt, ...)
4958 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4963 #undef PerlIO_tmpfile
4965 PerlIO_tmpfile(void)
4972 const int fd = win32_tmpfd();
4974 f = PerlIO_fdopen(fd, "w+b");
4976 # if defined(HAS_MKSTEMP) && ! defined(VMS) && ! defined(OS2)
4978 char tempname[] = "/tmp/PerlIO_XXXXXX";
4979 const char * const tmpdir = TAINTING_get ? NULL : PerlEnv_getenv("TMPDIR");
4981 int old_umask = umask(0600);
4983 * I have no idea how portable mkstemp() is ... NI-S
4985 if (tmpdir && *tmpdir) {
4986 /* if TMPDIR is set and not empty, we try that first */
4987 sv = newSVpv(tmpdir, 0);
4988 sv_catpv(sv, tempname + 4);
4989 fd = mkstemp(SvPVX(sv));
4994 /* else we try /tmp */
4995 fd = mkstemp(tempname);
5000 sv_catpv(sv, tempname + 4);
5001 fd = mkstemp(SvPVX(sv));
5005 f = PerlIO_fdopen(fd, "w+");
5007 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
5008 PerlLIO_unlink(sv ? SvPVX_const(sv) : tempname);
5011 # else /* !HAS_MKSTEMP, fallback to stdio tmpfile(). */
5012 FILE * const stdio = PerlSIO_tmpfile();
5015 f = PerlIO_fdopen(fileno(stdio), "w+");
5017 # endif /* else HAS_MKSTEMP */
5018 #endif /* else WIN32 */
5025 #endif /* PERLIO_IS_STDIO */
5027 /*======================================================================================*/
5029 * Now some functions in terms of above which may be needed even if we are
5030 * not in true PerlIO mode
5033 Perl_PerlIO_context_layers(pTHX_ const char *mode)
5036 const char *direction = NULL;
5039 * Need to supply default layer info from open.pm
5045 if (mode && mode[0] != 'r') {
5046 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_OUT)
5047 direction = "open>";
5049 if (PL_curcop->cop_hints & HINT_LEXICAL_IO_IN)
5050 direction = "open<";
5055 layers = cop_hints_fetch_pvn(PL_curcop, direction, 5, 0, 0);
5058 return SvOK(layers) ? SvPV_nolen_const(layers) : NULL;
5063 #undef PerlIO_setpos
5065 PerlIO_setpos(PerlIO *f, SV *pos)
5070 const Off_t * const posn = (Off_t *) SvPV(pos, len);
5071 if (f && len == sizeof(Off_t))
5072 return PerlIO_seek(f, *posn, SEEK_SET);
5074 SETERRNO(EINVAL, SS_IVCHAN);
5078 #undef PerlIO_setpos
5080 PerlIO_setpos(PerlIO *f, SV *pos)
5085 Fpos_t * const fpos = (Fpos_t *) SvPV(pos, len);
5086 if (f && len == sizeof(Fpos_t)) {
5087 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5088 return fsetpos64(f, fpos);
5090 return fsetpos(f, fpos);
5094 SETERRNO(EINVAL, SS_IVCHAN);
5100 #undef PerlIO_getpos
5102 PerlIO_getpos(PerlIO *f, SV *pos)
5105 Off_t posn = PerlIO_tell(f);
5106 sv_setpvn(pos, (char *) &posn, sizeof(posn));
5107 return (posn == (Off_t) - 1) ? -1 : 0;
5110 #undef PerlIO_getpos
5112 PerlIO_getpos(PerlIO *f, SV *pos)
5117 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
5118 code = fgetpos64(f, &fpos);
5120 code = fgetpos(f, &fpos);
5122 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5127 #if !defined(HAS_VPRINTF)
5130 vprintf(char *pat, char *args)
5132 _doprnt(pat, args, stdout);
5133 return 0; /* wrong, but perl doesn't use the return
5138 vfprintf(FILE *fd, char *pat, char *args)
5140 _doprnt(pat, args, fd);
5141 return 0; /* wrong, but perl doesn't use the return
5149 * c-indentation-style: bsd
5151 * indent-tabs-mode: nil
5154 * ex: set ts=8 sts=4 sw=4 et: