2 * perlio.c Copyright (c) 1996-2002, Nick Ing-Simmons You may distribute
3 * under the terms of either the GNU General Public License or the
4 * Artistic License, as specified in the README file.
8 * Hour after hour for nearly three weary days he had jogged up and down,
9 * over passes, and through long dales, and across many streams.
13 * If we have ActivePerl-like PERL_IMPLICIT_SYS then we need a dTHX to get
14 * at the dispatch tables, even when we do not need it for other reasons.
15 * Invent a dSYS macro to abstract this out
17 #ifdef PERL_IMPLICIT_SYS
30 #define PERLIO_NOT_STDIO 0
31 #if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
37 * This file provides those parts of PerlIO abstraction
38 * which are not #defined in perlio.h.
39 * Which these are depends on various Configure #ifdef's
43 #define PERL_IN_PERLIO_C
46 #ifdef PERL_IMPLICIT_CONTEXT
53 /* Call the callback or PerlIOBase, and return failure. */
54 #define Perl_PerlIO_or_Base(f, callback, base, failure, args) \
55 if (PerlIOValid(f)) { \
56 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
57 if (tab && tab->callback) \
58 return (*tab->callback) args; \
60 return PerlIOBase_ ## base args; \
63 SETERRNO(EBADF, SS_IVCHAN); \
66 /* Call the callback or fail, and return failure. */
67 #define Perl_PerlIO_or_fail(f, callback, failure, args) \
68 if (PerlIOValid(f)) { \
69 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
70 if (tab && tab->callback) \
71 return (*tab->callback) args; \
72 SETERRNO(EINVAL, LIB_INVARG); \
75 SETERRNO(EBADF, SS_IVCHAN); \
78 /* Call the callback or PerlIOBase, and be void. */
79 #define Perl_PerlIO_or_Base_void(f, callback, base, args) \
80 if (PerlIOValid(f)) { \
81 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
82 if (tab && tab->callback) \
83 (*tab->callback) args; \
85 PerlIOBase_ ## base args; \
88 SETERRNO(EBADF, SS_IVCHAN)
90 /* Call the callback or fail, and be void. */
91 #define Perl_PerlIO_or_fail_void(f, callback, args) \
92 if (PerlIOValid(f)) { \
93 PerlIO_funcs *tab = PerlIOBase(f)->tab; \
94 if (tab && tab->callback) \
95 (*tab->callback) args; \
97 SETERRNO(EINVAL, LIB_INVARG); \
100 SETERRNO(EBADF, SS_IVCHAN)
103 perlsio_binmode(FILE *fp, int iotype, int mode)
106 * This used to be contents of do_binmode in doio.c
109 # if defined(atarist) || defined(__MINT__)
112 ((FILE *) fp)->_flag |= _IOBIN;
114 ((FILE *) fp)->_flag &= ~_IOBIN;
121 if (PerlLIO_setmode(fp, mode) != -1) {
123 if (PerlLIO_setmode(fileno(fp), mode) != -1) {
125 # if defined(WIN32) && defined(__BORLANDC__)
127 * The translation mode of the stream is maintained independent of
128 * the translation mode of the fd in the Borland RTL (heavy
129 * digging through their runtime sources reveal). User has to set
130 * the mode explicitly for the stream (though they don't document
131 * this anywhere). GSAR 97-5-24
137 fp->flags &= ~_F_BIN;
145 # if defined(USEMYBINMODE)
147 if (my_binmode(fp, iotype, mode) != FALSE)
158 #define O_ACCMODE 3 /* Assume traditional implementation */
162 PerlIO_intmode2str(int rawmode, char *mode, int *writing)
164 int result = rawmode & O_ACCMODE;
169 ptype = IoTYPE_RDONLY;
172 ptype = IoTYPE_WRONLY;
180 *writing = (result != O_RDONLY);
182 if (result == O_RDONLY) {
186 else if (rawmode & O_APPEND) {
188 if (result != O_WRONLY)
193 if (result == O_WRONLY)
200 if (rawmode & O_BINARY)
206 #ifndef PERLIO_LAYERS
208 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
210 if (!names || !*names
211 || strEQ(names, ":crlf")
212 || strEQ(names, ":raw")
213 || strEQ(names, ":bytes")
217 Perl_croak(aTHX_ "Cannot apply \"%s\" in non-PerlIO perl", names);
225 PerlIO_destruct(pTHX)
230 PerlIO_binmode(pTHX_ PerlIO *fp, int iotype, int mode, const char *names)
235 return perlsio_binmode(fp, iotype, mode);
240 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
245 #ifdef PERL_IMPLICIT_SYS
246 return PerlSIO_fdupopen(f);
249 return win32_fdupopen(f);
252 int fd = PerlLIO_dup(PerlIO_fileno(f));
255 int omode = fcntl(fd, F_GETFL);
257 omode = djgpp_get_stream_mode(f);
259 PerlIO_intmode2str(omode,mode,NULL);
260 /* the r+ is a hack */
261 return PerlIO_fdopen(fd, mode);
266 SETERRNO(EBADF, SS_IVCHAN);
276 * De-mux PerlIO_openn() into fdopen, freopen and fopen type entries
280 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
281 int imode, int perm, PerlIO *old, int narg, SV **args)
285 Perl_croak(aTHX_ "More than one argument to open");
287 if (*args == &PL_sv_undef)
288 return PerlIO_tmpfile();
290 char *name = SvPV_nolen(*args);
292 fd = PerlLIO_open3(name, imode, perm);
294 return PerlIO_fdopen(fd, (char *) mode + 1);
297 return PerlIO_reopen(name, mode, old);
300 return PerlIO_open(name, mode);
305 return PerlIO_fdopen(fd, (char *) mode);
310 XS(XS_PerlIO__Layer__find)
314 Perl_croak(aTHX_ "Usage class->find(name[,load])");
316 char *name = SvPV_nolen(ST(1));
317 ST(0) = (strEQ(name, "crlf")
318 || strEQ(name, "raw")) ? &PL_sv_yes : &PL_sv_undef;
325 Perl_boot_core_PerlIO(pTHX)
327 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
333 #ifdef PERLIO_IS_STDIO
339 * Does nothing (yet) except force this file to be included in perl
340 * binary. That allows this file to force inclusion of other functions
341 * that may be required by loadable extensions e.g. for
342 * FileHandle::tmpfile
346 #undef PerlIO_tmpfile
353 #else /* PERLIO_IS_STDIO */
361 * This section is just to make sure these functions get pulled in from
365 #undef PerlIO_tmpfile
376 * Force this file to be included in perl binary. Which allows this
377 * file to force inclusion of other functions that may be required by
378 * loadable extensions e.g. for FileHandle::tmpfile
382 * Hack sfio does its own 'autoflush' on stdout in common cases. Flush
383 * results in a lot of lseek()s to regular files and lot of small
386 sfset(sfstdout, SF_SHARE, 0);
389 /* This is not the reverse of PerlIO_exportFILE(), PerlIO_releaseFILE() is. */
391 PerlIO_importFILE(FILE *stdio, const char *mode)
393 int fd = fileno(stdio);
394 if (!mode || !*mode) {
397 return PerlIO_fdopen(fd, mode);
401 PerlIO_findFILE(PerlIO *pio)
403 int fd = PerlIO_fileno(pio);
404 FILE *f = fdopen(fd, "r+");
406 if (!f && errno == EINVAL)
408 if (!f && errno == EINVAL)
415 /*======================================================================================*/
417 * Implement all the PerlIO interface ourselves.
423 * We _MUST_ have <unistd.h> if we are using lseek() and may have large
430 #include <sys/mman.h>
435 PerlIO_debug(const char *fmt, ...)
442 char *s = PerlEnv_getenv("PERLIO_DEBUG");
444 dbg = PerlLIO_open3(s, O_WRONLY | O_CREAT | O_APPEND, 0666);
451 /* Use fixed buffer as sv_catpvf etc. needs SVs */
455 s = CopFILE(PL_curcop);
458 sprintf(buffer, "%s:%" IVdf " ", s, (IV) CopLINE(PL_curcop));
459 len = strlen(buffer);
460 vsprintf(buffer+len, fmt, ap);
461 PerlLIO_write(dbg, buffer, strlen(buffer));
463 SV *sv = newSVpvn("", 0);
466 s = CopFILE(PL_curcop);
469 Perl_sv_catpvf(aTHX_ sv, "%s:%" IVdf " ", s,
470 (IV) CopLINE(PL_curcop));
471 Perl_sv_vcatpvf(aTHX_ sv, fmt, &ap);
474 PerlLIO_write(dbg, s, len);
481 /*--------------------------------------------------------------------------------------*/
484 * Inner level routines
488 * Table of pointers to the PerlIO structs (malloc'ed)
490 #define PERLIO_TABLE_SIZE 64
493 PerlIO_allocate(pTHX)
496 * Find a free slot in the table, allocating new table as necessary
501 while ((f = *last)) {
503 last = (PerlIO **) (f);
504 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
510 Newz('I',f,PERLIO_TABLE_SIZE,PerlIO);
518 #undef PerlIO_fdupopen
520 PerlIO_fdupopen(pTHX_ PerlIO *f, CLONE_PARAMS *param, int flags)
522 if (PerlIOValid(f)) {
523 PerlIO_funcs *tab = PerlIOBase(f)->tab;
524 PerlIO_debug("fdupopen f=%p param=%p\n",(void*)f,(void*)param);
526 return (*tab->Dup)(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
528 return PerlIOBase_dup(aTHX_ PerlIO_allocate(aTHX), f, param, flags);
532 SETERRNO(EBADF, SS_IVCHAN);
538 PerlIO_cleantable(pTHX_ PerlIO **tablep)
540 PerlIO *table = *tablep;
543 PerlIO_cleantable(aTHX_(PerlIO **) & (table[0]));
544 for (i = PERLIO_TABLE_SIZE - 1; i > 0; i--) {
545 PerlIO *f = table + i;
557 PerlIO_list_alloc(pTHX)
560 Newz('L', list, 1, PerlIO_list_t);
566 PerlIO_list_free(pTHX_ PerlIO_list_t *list)
569 if (--list->refcnt == 0) {
572 for (i = 0; i < list->cur; i++) {
573 if (list->array[i].arg)
574 SvREFCNT_dec(list->array[i].arg);
576 Safefree(list->array);
584 PerlIO_list_push(pTHX_ PerlIO_list_t *list, PerlIO_funcs *funcs, SV *arg)
587 if (list->cur >= list->len) {
590 Renew(list->array, list->len, PerlIO_pair_t);
592 New('l', list->array, list->len, PerlIO_pair_t);
594 p = &(list->array[list->cur++]);
596 if ((p->arg = arg)) {
602 PerlIO_clone_list(pTHX_ PerlIO_list_t *proto, CLONE_PARAMS *param)
604 PerlIO_list_t *list = (PerlIO_list_t *) NULL;
607 list = PerlIO_list_alloc(aTHX);
608 for (i=0; i < proto->cur; i++) {
610 if (proto->array[i].arg)
611 arg = PerlIO_sv_dup(aTHX_ proto->array[i].arg,param);
612 PerlIO_list_push(aTHX_ list, proto->array[i].funcs, arg);
619 PerlIO_clone(pTHX_ PerlInterpreter *proto, CLONE_PARAMS *param)
622 PerlIO **table = &proto->Iperlio;
625 PL_known_layers = PerlIO_clone_list(aTHX_ proto->Iknown_layers, param);
626 PL_def_layerlist = PerlIO_clone_list(aTHX_ proto->Idef_layerlist, param);
627 PerlIO_allocate(aTHX); /* root slot is never used */
628 PerlIO_debug("Clone %p from %p\n",aTHX,proto);
629 while ((f = *table)) {
631 table = (PerlIO **) (f++);
632 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
634 (void) fp_dup(f, 0, param);
643 PerlIO_destruct(pTHX)
645 PerlIO **table = &PL_perlio;
648 PerlIO_debug("Destruct %p\n",aTHX);
650 while ((f = *table)) {
652 table = (PerlIO **) (f++);
653 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
657 if (l->tab->kind & PERLIO_K_DESTRUCT) {
658 PerlIO_debug("Destruct popping %s\n", l->tab->name);
672 PerlIO_pop(pTHX_ PerlIO *f)
676 PerlIO_debug("PerlIO_pop f=%p %s\n", (void*)f, l->tab->name);
677 if (l->tab->Popped) {
679 * If popped returns non-zero do not free its layer structure
680 * it has either done so itself, or it is shared and still in
683 if ((*l->tab->Popped) (aTHX_ f) != 0)
691 /* Return as an array the stack of layers on a filehandle. Note that
692 * the stack is returned top-first in the array, and there are three
693 * times as many array elements as there are layers in the stack: the
694 * first element of a layer triplet is the name, the second one is the
695 * arguments, and the third one is the flags. */
698 PerlIO_get_layers(pTHX_ PerlIO *f)
702 if (PerlIOValid(f)) {
703 PerlIOl *l = PerlIOBase(f);
706 SV *name = l->tab && l->tab->name ?
707 newSVpv(l->tab->name, 0) : &PL_sv_undef;
708 SV *arg = l->tab && l->tab->Getarg ?
709 (*l->tab->Getarg)(aTHX_ &l, 0, 0) : &PL_sv_undef;
712 av_push(av, newSViv((IV)l->flags));
720 /*--------------------------------------------------------------------------------------*/
722 * XS Interface for perl code
726 PerlIO_find_layer(pTHX_ const char *name, STRLEN len, int load)
729 if ((SSize_t) len <= 0)
731 for (i = 0; i < PL_known_layers->cur; i++) {
732 PerlIO_funcs *f = PL_known_layers->array[i].funcs;
733 if (memEQ(f->name, name, len)) {
734 PerlIO_debug("%.*s => %p\n", (int) len, name, (void*)f);
738 if (load && PL_subname && PL_def_layerlist
739 && PL_def_layerlist->cur >= 2) {
740 if (PL_in_load_module) {
741 Perl_croak(aTHX_ "Recursive call to Perl_load_module in PerlIO_find_layer");
744 SV *pkgsv = newSVpvn("PerlIO", 6);
745 SV *layer = newSVpvn(name, len);
746 CV *cv = get_cv("PerlIO::Layer::NoWarnings", FALSE);
748 SAVEINT(PL_in_load_module);
750 SAVESPTR(PL_warnhook);
751 PL_warnhook = (SV *) cv;
755 * The two SVs are magically freed by load_module
757 Perl_load_module(aTHX_ 0, pkgsv, Nullsv, layer, Nullsv);
760 return PerlIO_find_layer(aTHX_ name, len, 0);
763 PerlIO_debug("Cannot find %.*s\n", (int) len, name);
767 #ifdef USE_ATTRIBUTES_FOR_PERLIO
770 perlio_mg_set(pTHX_ SV *sv, MAGIC *mg)
773 IO *io = GvIOn((GV *) SvRV(sv));
774 PerlIO *ifp = IoIFP(io);
775 PerlIO *ofp = IoOFP(io);
776 Perl_warn(aTHX_ "set %" SVf " %p %p %p", sv, io, ifp, ofp);
782 perlio_mg_get(pTHX_ SV *sv, MAGIC *mg)
785 IO *io = GvIOn((GV *) SvRV(sv));
786 PerlIO *ifp = IoIFP(io);
787 PerlIO *ofp = IoOFP(io);
788 Perl_warn(aTHX_ "get %" SVf " %p %p %p", sv, io, ifp, ofp);
794 perlio_mg_clear(pTHX_ SV *sv, MAGIC *mg)
796 Perl_warn(aTHX_ "clear %" SVf, sv);
801 perlio_mg_free(pTHX_ SV *sv, MAGIC *mg)
803 Perl_warn(aTHX_ "free %" SVf, sv);
807 MGVTBL perlio_vtab = {
815 XS(XS_io_MODIFY_SCALAR_ATTRIBUTES)
818 SV *sv = SvRV(ST(1));
823 sv_magic(sv, (SV *) av, PERL_MAGIC_ext, NULL, 0);
825 mg = mg_find(sv, PERL_MAGIC_ext);
826 mg->mg_virtual = &perlio_vtab;
828 Perl_warn(aTHX_ "attrib %" SVf, sv);
829 for (i = 2; i < items; i++) {
831 const char *name = SvPV(ST(i), len);
832 SV *layer = PerlIO_find_layer(aTHX_ name, len, 1);
834 av_push(av, SvREFCNT_inc(layer));
845 #endif /* USE_ATTIBUTES_FOR_PERLIO */
848 PerlIO_tab_sv(pTHX_ PerlIO_funcs *tab)
850 HV *stash = gv_stashpv("PerlIO::Layer", TRUE);
851 SV *sv = sv_bless(newRV_noinc(newSViv(PTR2IV(tab))), stash);
855 XS(XS_PerlIO__Layer__NoWarnings)
857 /* This is used as a %SIG{__WARN__} handler to supress warnings
858 during loading of layers.
862 PerlIO_debug("warning:%s\n",SvPV_nolen(ST(0)));
866 XS(XS_PerlIO__Layer__find)
870 Perl_croak(aTHX_ "Usage class->find(name[,load])");
873 char *name = SvPV(ST(1), len);
874 bool load = (items > 2) ? SvTRUE(ST(2)) : 0;
875 PerlIO_funcs *layer = PerlIO_find_layer(aTHX_ name, len, load);
877 (layer) ? sv_2mortal(PerlIO_tab_sv(aTHX_ layer)) :
884 PerlIO_define_layer(pTHX_ PerlIO_funcs *tab)
886 if (!PL_known_layers)
887 PL_known_layers = PerlIO_list_alloc(aTHX);
888 PerlIO_list_push(aTHX_ PL_known_layers, tab, Nullsv);
889 PerlIO_debug("define %s %p\n", tab->name, (void*)tab);
893 PerlIO_parse_layers(pTHX_ PerlIO_list_t *av, const char *names)
896 const char *s = names;
898 while (isSPACE(*s) || *s == ':')
903 const char *as = Nullch;
905 if (!isIDFIRST(*s)) {
907 * Message is consistent with how attribute lists are
908 * passed. Even though this means "foo : : bar" is
909 * seen as an invalid separator character.
911 char q = ((*s == '\'') ? '"' : '\'');
912 if (ckWARN(WARN_LAYER))
913 Perl_warner(aTHX_ packWARN(WARN_LAYER),
914 "perlio: invalid separator character %c%c%c in layer specification list %s",
916 SETERRNO(EINVAL, LIB_INVARG);
921 } while (isALNUM(*e));
937 * It's a nul terminated string, not allowed
938 * to \ the terminating null. Anything other
939 * character is passed over.
949 if (ckWARN(WARN_LAYER))
950 Perl_warner(aTHX_ packWARN(WARN_LAYER),
951 "perlio: argument list not closed for layer \"%.*s\"",
963 bool warn_layer = ckWARN(WARN_LAYER);
964 PerlIO_funcs *layer =
965 PerlIO_find_layer(aTHX_ s, llen, 1);
967 PerlIO_list_push(aTHX_ av, layer,
974 Perl_warner(aTHX_ packWARN(WARN_LAYER), "perlio: unknown layer \"%.*s\"",
987 PerlIO_default_buffer(pTHX_ PerlIO_list_t *av)
989 PerlIO_funcs *tab = &PerlIO_perlio;
990 #ifdef PERLIO_USING_CRLF
993 if (PerlIO_stdio.Set_ptrcnt)
996 PerlIO_debug("Pushing %s\n", tab->name);
997 PerlIO_list_push(aTHX_ av, PerlIO_find_layer(aTHX_ tab->name, 0, 0),
1002 PerlIO_arg_fetch(PerlIO_list_t *av, IV n)
1004 return av->array[n].arg;
1008 PerlIO_layer_fetch(pTHX_ PerlIO_list_t *av, IV n, PerlIO_funcs *def)
1010 if (n >= 0 && n < av->cur) {
1011 PerlIO_debug("Layer %" IVdf " is %s\n", n,
1012 av->array[n].funcs->name);
1013 return av->array[n].funcs;
1016 Perl_croak(aTHX_ "panic: PerlIO layer array corrupt");
1021 PerlIO_syslayer(pTHX_ PerlIO *f)
1023 if (PerlIOValid(f)) {
1025 while (*PerlIONext(f)) {
1030 Perl_warn(aTHX_ "syslayer %s",l->tab->name);
1035 SETERRNO(EBADF, SS_IVCHAN);
1042 PerlIOPop_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1044 if (PerlIOValid(f)) {
1046 PerlIO_pop(aTHX_ f);
1052 PerlIO_funcs PerlIO_remove = {
1053 sizeof(PerlIO_funcs),
1056 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1074 NULL, /* get_base */
1075 NULL, /* get_bufsiz */
1078 NULL, /* set_ptrcnt */
1082 PerlIO_default_layers(pTHX)
1084 if (!PL_def_layerlist) {
1085 const char *s = (PL_tainting) ? Nullch : PerlEnv_getenv("PERLIO");
1086 PerlIO_funcs *osLayer = &PerlIO_unix;
1087 PL_def_layerlist = PerlIO_list_alloc(aTHX);
1088 PerlIO_define_layer(aTHX_ & PerlIO_unix);
1089 #if defined(WIN32) && !defined(UNDER_CE)
1090 PerlIO_define_layer(aTHX_ & PerlIO_win32);
1092 osLayer = &PerlIO_win32;
1095 PerlIO_define_layer(aTHX_ & PerlIO_raw);
1096 PerlIO_define_layer(aTHX_ & PerlIO_perlio);
1097 PerlIO_define_layer(aTHX_ & PerlIO_stdio);
1098 PerlIO_define_layer(aTHX_ & PerlIO_crlf);
1100 PerlIO_define_layer(aTHX_ & PerlIO_mmap);
1102 PerlIO_define_layer(aTHX_ & PerlIO_utf8);
1103 PerlIO_define_layer(aTHX_ & PerlIO_remove);
1104 PerlIO_define_layer(aTHX_ & PerlIO_byte);
1105 PerlIO_list_push(aTHX_ PL_def_layerlist,
1106 PerlIO_find_layer(aTHX_ osLayer->name, 0, 0),
1109 PerlIO_parse_layers(aTHX_ PL_def_layerlist, s);
1112 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1115 if (PL_def_layerlist->cur < 2) {
1116 PerlIO_default_buffer(aTHX_ PL_def_layerlist);
1118 return PL_def_layerlist;
1122 Perl_boot_core_PerlIO(pTHX)
1124 #ifdef USE_ATTRIBUTES_FOR_PERLIO
1125 newXS("io::MODIFY_SCALAR_ATTRIBUTES", XS_io_MODIFY_SCALAR_ATTRIBUTES,
1128 newXS("PerlIO::Layer::find", XS_PerlIO__Layer__find, __FILE__);
1129 newXS("PerlIO::Layer::NoWarnings", XS_PerlIO__Layer__NoWarnings, __FILE__);
1133 PerlIO_default_layer(pTHX_ I32 n)
1135 PerlIO_list_t *av = PerlIO_default_layers(aTHX);
1138 return PerlIO_layer_fetch(aTHX_ av, n, &PerlIO_stdio);
1141 #define PerlIO_default_top() PerlIO_default_layer(aTHX_ -1)
1142 #define PerlIO_default_btm() PerlIO_default_layer(aTHX_ 0)
1145 PerlIO_stdstreams(pTHX)
1148 PerlIO_allocate(aTHX);
1149 PerlIO_fdopen(0, "Ir" PERLIO_STDTEXT);
1150 PerlIO_fdopen(1, "Iw" PERLIO_STDTEXT);
1151 PerlIO_fdopen(2, "Iw" PERLIO_STDTEXT);
1156 PerlIO_push(pTHX_ PerlIO *f, PerlIO_funcs *tab, const char *mode, SV *arg)
1158 if (tab->fsize != sizeof(PerlIO_funcs)) {
1160 Perl_croak(aTHX_ "Layer does not match this perl");
1164 if (tab->size < sizeof(PerlIOl)) {
1167 /* Real layer with a data area */
1168 Newc('L',l,tab->size,char,PerlIOl);
1170 Zero(l, tab->size, char);
1174 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1175 (mode) ? mode : "(Null)", (void*)arg);
1176 if (*l->tab->Pushed &&
1177 (*l->tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1178 PerlIO_pop(aTHX_ f);
1184 /* Pseudo-layer where push does its own stack adjust */
1185 PerlIO_debug("PerlIO_push f=%p %s %s %p\n", (void*)f, tab->name,
1186 (mode) ? mode : "(Null)", (void*)arg);
1188 (*tab->Pushed) (aTHX_ f, mode, arg, tab) != 0) {
1196 PerlIOBase_binmode(pTHX_ PerlIO *f)
1198 if (PerlIOValid(f)) {
1199 /* Is layer suitable for raw stream ? */
1200 if (PerlIOBase(f)->tab->kind & PERLIO_K_RAW) {
1201 /* Yes - turn off UTF-8-ness, to undo UTF-8 locale effects */
1202 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1205 /* Not suitable - pop it */
1206 PerlIO_pop(aTHX_ f);
1214 PerlIORaw_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1217 if (PerlIOValid(f)) {
1222 * Strip all layers that are not suitable for a raw stream
1225 while (t && (l = *t)) {
1226 if (l->tab->Binmode) {
1227 /* Has a handler - normal case */
1228 if ((*l->tab->Binmode)(aTHX_ f) == 0) {
1230 /* Layer still there - move down a layer */
1239 /* No handler - pop it */
1240 PerlIO_pop(aTHX_ t);
1243 if (PerlIOValid(f)) {
1244 PerlIO_debug(":raw f=%p :%s\n", (void*)f, PerlIOBase(f)->tab->name);
1252 PerlIO_apply_layera(pTHX_ PerlIO *f, const char *mode,
1253 PerlIO_list_t *layers, IV n, IV max)
1257 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n, NULL);
1259 if (!PerlIO_push(aTHX_ f, tab, mode, PerlIOArg)) {
1270 PerlIO_apply_layers(pTHX_ PerlIO *f, const char *mode, const char *names)
1274 PerlIO_list_t *layers = PerlIO_list_alloc(aTHX);
1275 code = PerlIO_parse_layers(aTHX_ layers, names);
1277 code = PerlIO_apply_layera(aTHX_ f, mode, layers, 0, layers->cur);
1279 PerlIO_list_free(aTHX_ layers);
1285 /*--------------------------------------------------------------------------------------*/
1287 * Given the abstraction above the public API functions
1291 PerlIO_binmode(pTHX_ PerlIO *f, int iotype, int mode, const char *names)
1293 PerlIO_debug("PerlIO_binmode f=%p %s %c %x %s\n",
1294 (void*)f, PerlIOBase(f)->tab->name, iotype, mode,
1295 (names) ? names : "(Null)");
1297 /* Do not flush etc. if (e.g.) switching encodings.
1298 if a pushed layer knows it needs to flush lower layers
1299 (for example :unix which is never going to call them)
1300 it can do the flush when it is pushed.
1302 return PerlIO_apply_layers(aTHX_ f, NULL, names) == 0 ? TRUE : FALSE;
1305 /* Fake 5.6 legacy of using this call to turn ON O_TEXT */
1306 #ifdef PERLIO_USING_CRLF
1307 /* Legacy binmode only has meaning if O_TEXT has a value distinct from
1308 O_BINARY so we can look for it in mode.
1310 if (!(mode & O_BINARY)) {
1312 /* FIXME?: Looking down the layer stack seems wrong,
1313 but is a way of reaching past (say) an encoding layer
1314 to flip CRLF-ness of the layer(s) below
1317 /* Perhaps we should turn on bottom-most aware layer
1318 e.g. Ilya's idea that UNIX TTY could serve
1320 if (PerlIOBase(f)->tab->kind & PERLIO_K_CANCRLF) {
1321 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
1322 /* Not in text mode - flush any pending stuff and flip it */
1324 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
1326 /* Only need to turn it on in one layer so we are done */
1331 /* Not finding a CRLF aware layer presumably means we are binary
1332 which is not what was requested - so we failed
1333 We _could_ push :crlf layer but so could caller
1338 /* Legacy binmode is now _defined_ as being equivalent to pushing :raw
1339 So code that used to be here is now in PerlIORaw_pushed().
1341 return PerlIO_push(aTHX_ f, &PerlIO_raw, Nullch, Nullsv) ? TRUE : FALSE;
1346 PerlIO__close(pTHX_ PerlIO *f)
1348 if (PerlIOValid(f)) {
1349 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1350 if (tab && tab->Close)
1351 return (*tab->Close)(aTHX_ f);
1353 return PerlIOBase_close(aTHX_ f);
1356 SETERRNO(EBADF, SS_IVCHAN);
1362 Perl_PerlIO_close(pTHX_ PerlIO *f)
1364 int code = PerlIO__close(aTHX_ f);
1365 while (PerlIOValid(f)) {
1366 PerlIO_pop(aTHX_ f);
1372 Perl_PerlIO_fileno(pTHX_ PerlIO *f)
1374 Perl_PerlIO_or_Base(f, Fileno, fileno, -1, (aTHX_ f));
1378 PerlIO_context_layers(pTHX_ const char *mode)
1380 const char *type = NULL;
1382 * Need to supply default layer info from open.pm
1385 SV *layers = PL_curcop->cop_io;
1388 type = SvPV(layers, len);
1389 if (type && mode[0] != 'r') {
1391 * Skip to write part
1393 const char *s = strchr(type, 0);
1394 if (s && (STRLEN)(s - type) < len) {
1403 static PerlIO_funcs *
1404 PerlIO_layer_from_ref(pTHX_ SV *sv)
1407 * For any scalar type load the handler which is bundled with perl
1409 if (SvTYPE(sv) < SVt_PVAV)
1410 return PerlIO_find_layer(aTHX_ "scalar", 6, 1);
1413 * For other types allow if layer is known but don't try and load it
1415 switch (SvTYPE(sv)) {
1417 return PerlIO_find_layer(aTHX_ "Array", 5, 0);
1419 return PerlIO_find_layer(aTHX_ "Hash", 4, 0);
1421 return PerlIO_find_layer(aTHX_ "Code", 4, 0);
1423 return PerlIO_find_layer(aTHX_ "Glob", 4, 0);
1429 PerlIO_resolve_layers(pTHX_ const char *layers,
1430 const char *mode, int narg, SV **args)
1432 PerlIO_list_t *def = PerlIO_default_layers(aTHX);
1435 PerlIO_stdstreams(aTHX);
1439 * If it is a reference but not an object see if we have a handler
1442 if (SvROK(arg) && !sv_isobject(arg)) {
1443 PerlIO_funcs *handler = PerlIO_layer_from_ref(aTHX_ SvRV(arg));
1445 def = PerlIO_list_alloc(aTHX);
1446 PerlIO_list_push(aTHX_ def, handler, &PL_sv_undef);
1450 * Don't fail if handler cannot be found :via(...) etc. may do
1451 * something sensible else we will just stringfy and open
1457 layers = PerlIO_context_layers(aTHX_ mode);
1458 if (layers && *layers) {
1462 av = PerlIO_list_alloc(aTHX);
1463 for (i = 0; i < def->cur; i++) {
1464 PerlIO_list_push(aTHX_ av, def->array[i].funcs,
1471 if (PerlIO_parse_layers(aTHX_ av, layers) == 0) {
1475 PerlIO_list_free(aTHX_ av);
1476 return (PerlIO_list_t *) NULL;
1487 PerlIO_openn(pTHX_ const char *layers, const char *mode, int fd,
1488 int imode, int perm, PerlIO *f, int narg, SV **args)
1490 if (!f && narg == 1 && *args == &PL_sv_undef) {
1491 if ((f = PerlIO_tmpfile())) {
1493 layers = PerlIO_context_layers(aTHX_ mode);
1494 if (layers && *layers)
1495 PerlIO_apply_layers(aTHX_ f, mode, layers);
1499 PerlIO_list_t *layera = NULL;
1501 PerlIO_funcs *tab = NULL;
1502 if (PerlIOValid(f)) {
1504 * This is "reopen" - it is not tested as perl does not use it
1508 layera = PerlIO_list_alloc(aTHX);
1510 SV *arg = (l->tab->Getarg)
1511 ? (*l->tab->Getarg) (aTHX_ &l, NULL, 0)
1513 PerlIO_list_push(aTHX_ layera, l->tab, arg);
1514 l = *PerlIONext(&l);
1518 layera = PerlIO_resolve_layers(aTHX_ layers, mode, narg, args);
1524 * Start at "top" of layer stack
1526 n = layera->cur - 1;
1528 PerlIO_funcs *t = PerlIO_layer_fetch(aTHX_ layera, n, NULL);
1537 * Found that layer 'n' can do opens - call it
1539 if (narg > 1 && !(tab->kind & PERLIO_K_MULTIARG)) {
1540 Perl_croak(aTHX_ "More than one argument to open(,':%s')",tab->name);
1542 PerlIO_debug("openn(%s,'%s','%s',%d,%x,%o,%p,%d,%p)\n",
1543 tab->name, layers, mode, fd, imode, perm,
1544 (void*)f, narg, (void*)args);
1546 f = (*tab->Open) (aTHX_ tab, layera, n, mode, fd, imode, perm,
1549 SETERRNO(EINVAL, LIB_INVARG);
1553 if (n + 1 < layera->cur) {
1555 * More layers above the one that we used to open -
1558 if (PerlIO_apply_layera(aTHX_ f, mode, layera, n + 1, layera->cur) != 0) {
1559 /* If pushing layers fails close the file */
1566 PerlIO_list_free(aTHX_ layera);
1573 Perl_PerlIO_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
1575 Perl_PerlIO_or_Base(f, Read, read, -1, (aTHX_ f, vbuf, count));
1579 Perl_PerlIO_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1581 Perl_PerlIO_or_Base(f, Unread, unread, -1, (aTHX_ f, vbuf, count));
1585 Perl_PerlIO_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
1587 Perl_PerlIO_or_fail(f, Write, -1, (aTHX_ f, vbuf, count));
1591 Perl_PerlIO_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
1593 Perl_PerlIO_or_fail(f, Seek, -1, (aTHX_ f, offset, whence));
1597 Perl_PerlIO_tell(pTHX_ PerlIO *f)
1599 Perl_PerlIO_or_fail(f, Tell, -1, (aTHX_ f));
1603 Perl_PerlIO_flush(pTHX_ PerlIO *f)
1607 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1609 if (tab && tab->Flush)
1610 return (*tab->Flush) (aTHX_ f);
1612 return 0; /* If no Flush defined, silently succeed. */
1615 PerlIO_debug("Cannot flush f=%p\n", (void*)f);
1616 SETERRNO(EBADF, SS_IVCHAN);
1622 * Is it good API design to do flush-all on NULL, a potentially
1623 * errorneous input? Maybe some magical value (PerlIO*
1624 * PERLIO_FLUSH_ALL = (PerlIO*)-1;)? Yes, stdio does similar
1625 * things on fflush(NULL), but should we be bound by their design
1628 PerlIO **table = &PL_perlio;
1630 while ((f = *table)) {
1632 table = (PerlIO **) (f++);
1633 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1634 if (*f && PerlIO_flush(f) != 0)
1644 PerlIOBase_flush_linebuf(pTHX)
1646 PerlIO **table = &PL_perlio;
1648 while ((f = *table)) {
1650 table = (PerlIO **) (f++);
1651 for (i = 1; i < PERLIO_TABLE_SIZE; i++) {
1654 flags & (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1655 == (PERLIO_F_LINEBUF | PERLIO_F_CANWRITE))
1663 Perl_PerlIO_fill(pTHX_ PerlIO *f)
1665 Perl_PerlIO_or_fail(f, Fill, -1, (aTHX_ f));
1669 PerlIO_isutf8(PerlIO *f)
1672 return (PerlIOBase(f)->flags & PERLIO_F_UTF8) != 0;
1674 SETERRNO(EBADF, SS_IVCHAN);
1680 Perl_PerlIO_eof(pTHX_ PerlIO *f)
1682 Perl_PerlIO_or_Base(f, Eof, eof, -1, (aTHX_ f));
1686 Perl_PerlIO_error(pTHX_ PerlIO *f)
1688 Perl_PerlIO_or_Base(f, Error, error, -1, (aTHX_ f));
1692 Perl_PerlIO_clearerr(pTHX_ PerlIO *f)
1694 Perl_PerlIO_or_Base_void(f, Clearerr, clearerr, (aTHX_ f));
1698 Perl_PerlIO_setlinebuf(pTHX_ PerlIO *f)
1700 Perl_PerlIO_or_Base_void(f, Setlinebuf, setlinebuf, (aTHX_ f));
1704 PerlIO_has_base(PerlIO *f)
1706 if (PerlIOValid(f)) {
1707 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1710 return (tab->Get_base != NULL);
1711 SETERRNO(EINVAL, LIB_INVARG);
1714 SETERRNO(EBADF, SS_IVCHAN);
1720 PerlIO_fast_gets(PerlIO *f)
1722 if (PerlIOValid(f) && (PerlIOBase(f)->flags & PERLIO_F_FASTGETS)) {
1723 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1726 return (tab->Set_ptrcnt != NULL);
1727 SETERRNO(EINVAL, LIB_INVARG);
1730 SETERRNO(EBADF, SS_IVCHAN);
1736 PerlIO_has_cntptr(PerlIO *f)
1738 if (PerlIOValid(f)) {
1739 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1742 return (tab->Get_ptr != NULL && tab->Get_cnt != NULL);
1743 SETERRNO(EINVAL, LIB_INVARG);
1746 SETERRNO(EBADF, SS_IVCHAN);
1752 PerlIO_canset_cnt(PerlIO *f)
1754 if (PerlIOValid(f)) {
1755 PerlIO_funcs *tab = PerlIOBase(f)->tab;
1758 return (tab->Set_ptrcnt != NULL);
1759 SETERRNO(EINVAL, LIB_INVARG);
1762 SETERRNO(EBADF, SS_IVCHAN);
1768 Perl_PerlIO_get_base(pTHX_ PerlIO *f)
1770 Perl_PerlIO_or_fail(f, Get_base, NULL, (aTHX_ f));
1774 Perl_PerlIO_get_bufsiz(pTHX_ PerlIO *f)
1776 Perl_PerlIO_or_fail(f, Get_bufsiz, -1, (aTHX_ f));
1780 Perl_PerlIO_get_ptr(pTHX_ PerlIO *f)
1782 Perl_PerlIO_or_fail(f, Get_ptr, NULL, (aTHX_ f));
1786 Perl_PerlIO_get_cnt(pTHX_ PerlIO *f)
1788 Perl_PerlIO_or_fail(f, Get_cnt, -1, (aTHX_ f));
1792 Perl_PerlIO_set_cnt(pTHX_ PerlIO *f, int cnt)
1794 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, NULL, cnt));
1798 Perl_PerlIO_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, int cnt)
1800 Perl_PerlIO_or_fail_void(f, Set_ptrcnt, (aTHX_ f, ptr, cnt));
1804 /*--------------------------------------------------------------------------------------*/
1806 * utf8 and raw dummy layers
1810 PerlIOUtf8_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1812 if (PerlIOValid(f)) {
1813 if (tab->kind & PERLIO_K_UTF8)
1814 PerlIOBase(f)->flags |= PERLIO_F_UTF8;
1816 PerlIOBase(f)->flags &= ~PERLIO_F_UTF8;
1822 PerlIO_funcs PerlIO_utf8 = {
1823 sizeof(PerlIO_funcs),
1826 PERLIO_K_DUMMY | PERLIO_K_UTF8,
1844 NULL, /* get_base */
1845 NULL, /* get_bufsiz */
1848 NULL, /* set_ptrcnt */
1851 PerlIO_funcs PerlIO_byte = {
1852 sizeof(PerlIO_funcs),
1873 NULL, /* get_base */
1874 NULL, /* get_bufsiz */
1877 NULL, /* set_ptrcnt */
1881 PerlIORaw_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
1882 IV n, const char *mode, int fd, int imode, int perm,
1883 PerlIO *old, int narg, SV **args)
1885 PerlIO_funcs *tab = PerlIO_default_btm();
1886 if (tab && tab->Open)
1887 return (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
1889 SETERRNO(EINVAL, LIB_INVARG);
1893 PerlIO_funcs PerlIO_raw = {
1894 sizeof(PerlIO_funcs),
1915 NULL, /* get_base */
1916 NULL, /* get_bufsiz */
1919 NULL, /* set_ptrcnt */
1921 /*--------------------------------------------------------------------------------------*/
1922 /*--------------------------------------------------------------------------------------*/
1924 * "Methods" of the "base class"
1928 PerlIOBase_fileno(pTHX_ PerlIO *f)
1930 return PerlIOValid(f) ? PerlIO_fileno(PerlIONext(f)) : -1;
1934 PerlIO_modestr(PerlIO * f, char *buf)
1937 if (PerlIOValid(f)) {
1938 IV flags = PerlIOBase(f)->flags;
1939 if (flags & PERLIO_F_APPEND) {
1941 if (flags & PERLIO_F_CANREAD) {
1945 else if (flags & PERLIO_F_CANREAD) {
1947 if (flags & PERLIO_F_CANWRITE)
1950 else if (flags & PERLIO_F_CANWRITE) {
1952 if (flags & PERLIO_F_CANREAD) {
1956 #ifdef PERLIO_USING_CRLF
1957 if (!(flags & PERLIO_F_CRLF))
1967 PerlIOBase_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
1969 PerlIOl *l = PerlIOBase(f);
1971 const char *omode = mode;
1974 l->flags &= ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE |
1975 PERLIO_F_TRUNCATE | PERLIO_F_APPEND);
1976 if (tab->Set_ptrcnt != NULL)
1977 l->flags |= PERLIO_F_FASTGETS;
1979 if (*mode == '#' || *mode == 'I')
1983 l->flags |= PERLIO_F_CANREAD;
1986 l->flags |= PERLIO_F_APPEND | PERLIO_F_CANWRITE;
1989 l->flags |= PERLIO_F_TRUNCATE | PERLIO_F_CANWRITE;
1992 SETERRNO(EINVAL, LIB_INVARG);
1998 l->flags |= PERLIO_F_CANREAD | PERLIO_F_CANWRITE;
2001 l->flags &= ~PERLIO_F_CRLF;
2004 l->flags |= PERLIO_F_CRLF;
2007 SETERRNO(EINVAL, LIB_INVARG);
2014 l->flags |= l->next->flags &
2015 (PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_TRUNCATE |
2020 PerlIO_debug("PerlIOBase_pushed f=%p %s %s fl=%08" UVxf " (%s)\n",
2021 f, PerlIOBase(f)->tab->name, (omode) ? omode : "(Null)",
2022 l->flags, PerlIO_modestr(f, temp));
2025 l->flags |= l->next->flags &
2026 (PERLIO_F_TTY | PERLIO_F_NOTREG | PERLIO_F_SOCKET);
2032 PerlIOBase_popped(pTHX_ PerlIO *f)
2038 PerlIOBase_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2041 * Save the position as current head considers it
2043 Off_t old = PerlIO_tell(f);
2045 PerlIO_push(aTHX_ f, &PerlIO_pending, "r", Nullsv);
2046 PerlIOSelf(f, PerlIOBuf)->posn = old;
2047 done = PerlIOBuf_unread(aTHX_ f, vbuf, count);
2052 PerlIOBase_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2054 STDCHAR *buf = (STDCHAR *) vbuf;
2056 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD))
2059 SSize_t avail = PerlIO_get_cnt(f);
2062 take = ((SSize_t)count < avail) ? count : avail;
2064 STDCHAR *ptr = PerlIO_get_ptr(f);
2065 Copy(ptr, buf, take, STDCHAR);
2066 PerlIO_set_ptrcnt(f, ptr + take, (avail -= take));
2070 if (count > 0 && avail <= 0) {
2071 if (PerlIO_fill(f) != 0)
2075 return (buf - (STDCHAR *) vbuf);
2081 PerlIOBase_noop_ok(pTHX_ PerlIO *f)
2087 PerlIOBase_noop_fail(pTHX_ PerlIO *f)
2093 PerlIOBase_close(pTHX_ PerlIO *f)
2096 if (PerlIOValid(f)) {
2097 PerlIO *n = PerlIONext(f);
2098 code = PerlIO_flush(f);
2099 PerlIOBase(f)->flags &=
2100 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2101 while (PerlIOValid(n)) {
2102 PerlIO_funcs *tab = PerlIOBase(n)->tab;
2103 if (tab && tab->Close) {
2104 if ((*tab->Close)(aTHX_ n) != 0)
2109 PerlIOBase(n)->flags &=
2110 ~(PERLIO_F_CANREAD | PERLIO_F_CANWRITE | PERLIO_F_OPEN);
2116 SETERRNO(EBADF, SS_IVCHAN);
2122 PerlIOBase_eof(pTHX_ PerlIO *f)
2124 if (PerlIOValid(f)) {
2125 return (PerlIOBase(f)->flags & PERLIO_F_EOF) != 0;
2131 PerlIOBase_error(pTHX_ PerlIO *f)
2133 if (PerlIOValid(f)) {
2134 return (PerlIOBase(f)->flags & PERLIO_F_ERROR) != 0;
2140 PerlIOBase_clearerr(pTHX_ PerlIO *f)
2142 if (PerlIOValid(f)) {
2143 PerlIO *n = PerlIONext(f);
2144 PerlIOBase(f)->flags &= ~(PERLIO_F_ERROR | PERLIO_F_EOF);
2151 PerlIOBase_setlinebuf(pTHX_ PerlIO *f)
2153 if (PerlIOValid(f)) {
2154 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF;
2159 PerlIO_sv_dup(pTHX_ SV *arg, CLONE_PARAMS *param)
2165 return sv_dup(arg, param);
2168 return newSVsv(arg);
2171 return newSVsv(arg);
2176 PerlIOBase_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2178 PerlIO *nexto = PerlIONext(o);
2179 if (PerlIOValid(nexto)) {
2180 PerlIO_funcs *tab = PerlIOBase(nexto)->tab;
2181 if (tab && tab->Dup)
2182 f = (*tab->Dup)(aTHX_ f, nexto, param, flags);
2184 f = PerlIOBase_dup(aTHX_ f, nexto, param, flags);
2187 PerlIO_funcs *self = PerlIOBase(o)->tab;
2190 PerlIO_debug("PerlIOBase_dup %s f=%p o=%p param=%p\n",
2191 self->name, (void*)f, (void*)o, (void*)param);
2193 arg = (*self->Getarg)(aTHX_ o, param, flags);
2197 f = PerlIO_push(aTHX_ f, self, PerlIO_modestr(o,buf), arg);
2205 #define PERLIO_MAX_REFCOUNTABLE_FD 2048
2207 perl_mutex PerlIO_mutex;
2209 int PerlIO_fd_refcnt[PERLIO_MAX_REFCOUNTABLE_FD];
2214 /* Place holder for stdstreams call ??? */
2216 MUTEX_INIT(&PerlIO_mutex);
2221 PerlIOUnix_refcnt_inc(int fd)
2223 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2225 MUTEX_LOCK(&PerlIO_mutex);
2227 PerlIO_fd_refcnt[fd]++;
2228 PerlIO_debug("fd %d refcnt=%d\n",fd,PerlIO_fd_refcnt[fd]);
2230 MUTEX_UNLOCK(&PerlIO_mutex);
2236 PerlIOUnix_refcnt_dec(int fd)
2239 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2241 MUTEX_LOCK(&PerlIO_mutex);
2243 cnt = --PerlIO_fd_refcnt[fd];
2244 PerlIO_debug("fd %d refcnt=%d\n",fd,cnt);
2246 MUTEX_UNLOCK(&PerlIO_mutex);
2253 PerlIO_cleanup(pTHX)
2257 PerlIO_debug("Cleanup layers for %p\n",aTHX);
2259 PerlIO_debug("Cleanup layers\n");
2261 /* Raise STDIN..STDERR refcount so we don't close them */
2262 for (i=0; i < 3; i++)
2263 PerlIOUnix_refcnt_inc(i);
2264 PerlIO_cleantable(aTHX_ &PL_perlio);
2265 /* Restore STDIN..STDERR refcount */
2266 for (i=0; i < 3; i++)
2267 PerlIOUnix_refcnt_dec(i);
2269 if (PL_known_layers) {
2270 PerlIO_list_free(aTHX_ PL_known_layers);
2271 PL_known_layers = NULL;
2273 if(PL_def_layerlist) {
2274 PerlIO_list_free(aTHX_ PL_def_layerlist);
2275 PL_def_layerlist = NULL;
2281 /*--------------------------------------------------------------------------------------*/
2283 * Bottom-most level for UNIX-like case
2287 struct _PerlIO base; /* The generic part */
2288 int fd; /* UNIX like file descriptor */
2289 int oflags; /* open/fcntl flags */
2293 PerlIOUnix_oflags(const char *mode)
2296 if (*mode == 'I' || *mode == '#')
2301 if (*++mode == '+') {
2308 oflags = O_CREAT | O_TRUNC;
2309 if (*++mode == '+') {
2318 oflags = O_CREAT | O_APPEND;
2319 if (*++mode == '+') {
2332 else if (*mode == 't') {
2334 oflags &= ~O_BINARY;
2338 * Always open in binary mode
2341 if (*mode || oflags == -1) {
2342 SETERRNO(EINVAL, LIB_INVARG);
2349 PerlIOUnix_fileno(pTHX_ PerlIO *f)
2351 return PerlIOSelf(f, PerlIOUnix)->fd;
2355 PerlIOUnix_setfd(pTHX_ PerlIO *f, int fd, int imode)
2357 PerlIOUnix *s = PerlIOSelf(f, PerlIOUnix);
2359 #if 1 || defined(WIN32) || defined(HAS_SOCKET) && \
2360 (defined(PERL_SOCK_SYSREAD_IS_RECV) || \
2361 defined(PERL_SOCK_SYSWRITE_IS_SEND))
2363 if (PerlLIO_fstat(fd, &st) == 0) {
2365 /* WIN32 needs to know about non-regular files
2366 as only regular files can be lseek()ed
2368 if (!S_ISREG(st.st_mode)) {
2369 PerlIO_debug("%d is not regular file\n",fd);
2370 PerlIOBase(f)->flags |= PERLIO_F_NOTREG;
2373 PerlIO_debug("%d _is_ a regular file\n",fd);
2376 /* If read/write are to be mapped to recv/send we need
2377 to know this is a socket.
2378 Lifted from code in doio.c that handles socket detection on dup
2381 if (S_ISSOCK(st.st_mode))
2382 PerlIOBase(f)->flags |= PERLIO_F_SOCKET;
2385 !(st.st_mode & S_IFMT)
2391 Sock_size_t buflen = sizeof tmpbuf;
2392 if (PerlSock_getsockname(fd, (struct sockaddr *)tmpbuf, &buflen) >= 0
2393 || errno != ENOTSOCK)
2394 PerlIOBase(f)->flags |= PERLIO_F_SOCKET; /* some OS's return 0 on fstat()ed socket */
2395 /* but some return 0 for streams too, sigh */
2397 #endif /* !PERL_MICRO */
2399 #endif /* HAS_SOCKET ... */
2403 PerlIOUnix_refcnt_inc(fd);
2407 PerlIOUnix_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2409 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2410 if (*PerlIONext(f)) {
2411 /* We never call down so do any pending stuff now */
2412 PerlIO_flush(PerlIONext(f));
2414 * XXX could (or should) we retrieve the oflags from the open file
2415 * handle rather than believing the "mode" we are passed in? XXX
2416 * Should the value on NULL mode be 0 or -1?
2418 PerlIOUnix_setfd(aTHX_ f, PerlIO_fileno(PerlIONext(f)),
2419 mode ? PerlIOUnix_oflags(mode) : -1);
2421 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2427 PerlIOUnix_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2428 IV n, const char *mode, int fd, int imode,
2429 int perm, PerlIO *f, int narg, SV **args)
2431 if (PerlIOValid(f)) {
2432 if (PerlIOBase(f)->flags & PERLIO_F_OPEN)
2433 (*PerlIOBase(f)->tab->Close)(aTHX_ f);
2436 char *path = SvPV_nolen(*args);
2440 imode = PerlIOUnix_oflags(mode);
2444 fd = PerlLIO_open3(path, imode, perm);
2451 f = PerlIO_allocate(aTHX);
2453 if (!PerlIOValid(f)) {
2454 if (!(f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2458 PerlIOUnix_setfd(aTHX_ f, fd, imode);
2459 PerlIOBase(f)->flags |= PERLIO_F_OPEN;
2465 * FIXME: pop layers ???
2473 PerlIOUnix_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2475 PerlIOUnix *os = PerlIOSelf(o, PerlIOUnix);
2477 if (flags & PERLIO_DUP_FD) {
2478 fd = PerlLIO_dup(fd);
2480 if (fd >= 0 && fd < PERLIO_MAX_REFCOUNTABLE_FD) {
2481 f = PerlIOBase_dup(aTHX_ f, o, param, flags);
2483 /* If all went well overwrite fd in dup'ed lay with the dup()'ed fd */
2484 PerlIOUnix_setfd(aTHX_ f, fd, os->oflags);
2493 PerlIOUnix_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
2495 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2496 if (!(PerlIOBase(f)->flags & PERLIO_F_CANREAD)) {
2497 SETERRNO(EBADF, SS_IVCHAN);
2498 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2501 if (PerlIOBase(f)->flags & (PERLIO_F_EOF|PERLIO_F_ERROR)) {
2506 #ifdef PERL_SOCK_SYSREAD_IS_RECV
2507 if (PerlIOBase(f)->flags & PERLIO_F_SOCKET) {
2508 len = PerlSock_recv(fd, vbuf, count, 0);
2513 len = PerlLIO_read(fd, vbuf, count);
2515 if (len >= 0 || errno != EINTR) {
2517 if (errno != EAGAIN) {
2518 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2521 else if (len == 0 && count != 0) {
2522 PerlIOBase(f)->flags |= PERLIO_F_EOF;
2532 PerlIOUnix_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
2534 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2536 SSize_t len = PerlLIO_write(fd, vbuf, count);
2537 if (len >= 0 || errno != EINTR) {
2539 if (errno != EAGAIN) {
2540 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
2550 PerlIOUnix_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
2552 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2554 if (PerlIOBase(f)->flags & PERLIO_F_NOTREG) {
2556 SETERRNO(ESPIPE, LIB_INVARG);
2558 SETERRNO(EINVAL, LIB_INVARG);
2562 new = PerlLIO_lseek(fd, offset, whence);
2563 if (new == (Off_t) - 1)
2567 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
2572 PerlIOUnix_tell(pTHX_ PerlIO *f)
2574 return PerlLIO_lseek(PerlIOSelf(f, PerlIOUnix)->fd, 0, SEEK_CUR);
2579 PerlIOUnix_close(pTHX_ PerlIO *f)
2581 int fd = PerlIOSelf(f, PerlIOUnix)->fd;
2583 if (PerlIOBase(f)->flags & PERLIO_F_OPEN) {
2584 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2585 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2590 SETERRNO(EBADF,SS_IVCHAN);
2593 while (PerlLIO_close(fd) != 0) {
2594 if (errno != EINTR) {
2601 PerlIOBase(f)->flags &= ~PERLIO_F_OPEN;
2606 PerlIO_funcs PerlIO_unix = {
2607 sizeof(PerlIO_funcs),
2614 PerlIOBase_binmode, /* binmode */
2624 PerlIOBase_noop_ok, /* flush */
2625 PerlIOBase_noop_fail, /* fill */
2628 PerlIOBase_clearerr,
2629 PerlIOBase_setlinebuf,
2630 NULL, /* get_base */
2631 NULL, /* get_bufsiz */
2634 NULL, /* set_ptrcnt */
2637 /*--------------------------------------------------------------------------------------*/
2642 #if defined(VMS) && !defined(STDIO_BUFFER_WRITABLE)
2643 /* perl5.8 - This ensures the last minute VMS ungetc fix is not
2644 broken by the last second glibc 2.3 fix
2646 #define STDIO_BUFFER_WRITABLE
2651 struct _PerlIO base;
2652 FILE *stdio; /* The stream */
2656 PerlIOStdio_fileno(pTHX_ PerlIO *f)
2659 if (PerlIOValid(f) && (s = PerlIOSelf(f, PerlIOStdio)->stdio)) {
2660 return PerlSIO_fileno(s);
2667 PerlIOStdio_mode(const char *mode, char *tmode)
2673 #ifdef PERLIO_USING_CRLF
2681 PerlIOStdio_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
2684 if (PerlIOValid(f) && PerlIOValid(n = PerlIONext(f))) {
2685 PerlIO_funcs *toptab = PerlIOBase(n)->tab;
2686 if (toptab == tab) {
2687 /* Top is already stdio - pop self (duplicate) and use original */
2688 PerlIO_pop(aTHX_ f);
2691 int fd = PerlIO_fileno(n);
2694 if (fd >= 0 && (stdio = PerlSIO_fdopen(fd,
2695 mode = PerlIOStdio_mode(mode, tmode)))) {
2696 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2697 /* We never call down so do any pending stuff now */
2698 PerlIO_flush(PerlIONext(f));
2705 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
2710 PerlIO_importFILE(FILE *stdio, const char *mode)
2716 if (!mode || !*mode) {
2717 /* We need to probe to see how we can open the stream
2718 so start with read/write and then try write and read
2719 we dup() so that we can fclose without loosing the fd.
2721 Note that the errno value set by a failing fdopen
2722 varies between stdio implementations.
2724 int fd = PerlLIO_dup(fileno(stdio));
2725 FILE *f2 = PerlSIO_fdopen(fd, (mode = "r+"));
2727 f2 = PerlSIO_fdopen(fd, (mode = "w"));
2730 f2 = PerlSIO_fdopen(fd, (mode = "r"));
2733 /* Don't seem to be able to open */
2739 if ((f = PerlIO_push(aTHX_(f = PerlIO_allocate(aTHX)), &PerlIO_stdio, mode, Nullsv))) {
2740 s = PerlIOSelf(f, PerlIOStdio);
2748 PerlIOStdio_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
2749 IV n, const char *mode, int fd, int imode,
2750 int perm, PerlIO *f, int narg, SV **args)
2753 if (PerlIOValid(f)) {
2754 char *path = SvPV_nolen(*args);
2755 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
2757 PerlIOUnix_refcnt_dec(fileno(s->stdio));
2758 stdio = PerlSIO_freopen(path, (mode = PerlIOStdio_mode(mode, tmode)),
2763 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2768 char *path = SvPV_nolen(*args);
2771 fd = PerlLIO_open3(path, imode, perm);
2774 FILE *stdio = PerlSIO_fopen(path, mode);
2778 f = PerlIO_allocate(aTHX);
2780 if ((f = PerlIO_push(aTHX_ f, self,
2781 (mode = PerlIOStdio_mode(mode, tmode)),
2783 s = PerlIOSelf(f, PerlIOStdio);
2785 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2804 stdio = PerlSIO_stdin;
2807 stdio = PerlSIO_stdout;
2810 stdio = PerlSIO_stderr;
2815 stdio = PerlSIO_fdopen(fd, mode =
2816 PerlIOStdio_mode(mode, tmode));
2821 f = PerlIO_allocate(aTHX);
2823 if ((f = PerlIO_push(aTHX_ f, self, mode, PerlIOArg))) {
2824 s = PerlIOSelf(f, PerlIOStdio);
2826 PerlIOUnix_refcnt_inc(fileno(s->stdio));
2836 PerlIOStdio_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
2838 /* This assumes no layers underneath - which is what
2839 happens, but is not how I remember it. NI-S 2001/10/16
2841 if ((f = PerlIOBase_dup(aTHX_ f, o, param, flags))) {
2842 FILE *stdio = PerlIOSelf(o, PerlIOStdio)->stdio;
2843 int fd = fileno(stdio);
2845 if (flags & PERLIO_DUP_FD) {
2846 int dfd = PerlLIO_dup(fileno(stdio));
2848 stdio = PerlSIO_fdopen(dfd, PerlIO_modestr(o,mode));
2852 /* FIXME: To avoid messy error recovery if dup fails
2853 re-use the existing stdio as though flag was not set
2857 stdio = PerlSIO_fdopen(fd, PerlIO_modestr(o,mode));
2859 PerlIOSelf(f, PerlIOStdio)->stdio = stdio;
2860 PerlIOUnix_refcnt_inc(fileno(stdio));
2866 PerlIOStdio_invalidate_fileno(pTHX_ FILE *f)
2868 /* XXX this could use PerlIO_canset_fileno() and
2869 * PerlIO_set_fileno() support from Configure
2871 # if defined(__GLIBC__)
2872 /* There may be a better way for GLIBC:
2873 - libio.h defines a flag to not close() on cleanup
2877 # elif defined(__sun__)
2879 /* On solaris, if _LP64 is defined, the FILE structure is this:
2885 * It turns out that the fd is stored in the top 32 bits of
2886 * file->__pad[4]. The lower 32 bits contain flags. file->pad[5] appears
2887 * to contain a pointer or offset into another structure. All the
2888 * remaining fields are zero.
2890 * We set the top bits to -1 (0xFFFFFFFF).
2892 f->__pad[4] |= 0xffffffff00000000L;
2893 assert(fileno(f) == 0xffffffff);
2894 # else /* !defined(_LP64) */
2895 /* _file is just a unsigned char :-(
2896 Not clear why we dup() rather than using -1
2897 even if that would be treated as 0xFF - so will
2900 f->_file = PerlLIO_dup(fileno(f));
2901 # endif /* defined(_LP64) */
2903 # elif defined(__hpux)
2907 /* Next one ->_file seems to be a reasonable fallback, i.e. if
2908 your platform does not have special entry try this one.
2909 [For OSF only have confirmation for Tru64 (alpha)
2910 but assume other OSFs will be similar.]
2912 # elif defined(_AIX) || defined(__osf__) || defined(__irix__)
2915 # elif defined(__FreeBSD__)
2916 /* There may be a better way on FreeBSD:
2917 - we could insert a dummy func in the _close function entry
2918 f->_close = (int (*)(void *)) dummy_close;
2922 # elif defined(__CYGWIN__)
2923 /* There may be a better way on CYGWIN:
2924 - we could insert a dummy func in the _close function entry
2925 f->_close = (int (*)(void *)) dummy_close;
2929 # elif defined(WIN32)
2930 # if defined(__BORLANDC__)
2931 f->fd = PerlLIO_dup(fileno(f));
2932 # elif defined(UNDER_CE)
2933 /* WIN_CE does not have access to FILE internals, it hardly has FILE
2942 /* Sarathy's code did this - we fall back to a dup/dup2 hack
2943 (which isn't thread safe) instead
2945 # error "Don't know how to set FILE.fileno on your platform"
2952 PerlIOStdio_close(pTHX_ PerlIO *f)
2954 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
2960 int fd = fileno(stdio);
2966 #ifdef SOCKS5_VERSION_NAME
2967 /* Socks lib overrides close() but stdio isn't linked to
2968 that library (though we are) - so we must call close()
2969 on sockets on stdio's behalf.
2972 Sock_size_t optlen = sizeof(int);
2973 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (void *) &optval, &optlen) == 0) {
2978 if (PerlIOUnix_refcnt_dec(fd) > 0) {
2979 /* File descriptor still in use */
2984 /* For STD* handles don't close the stdio at all
2985 this is because we have shared the FILE * too
2987 if (stdio == stdin) {
2988 /* Some stdios are buggy fflush-ing inputs */
2991 else if (stdio == stdout || stdio == stderr) {
2992 return PerlIO_flush(f);
2994 /* Tricky - must fclose(stdio) to free memory but not close(fd)
2995 Use Sarathy's trick from maint-5.6 to invalidate the
2996 fileno slot of the FILE *
2998 result = PerlIO_flush(f);
3000 if (!(invalidate = PerlIOStdio_invalidate_fileno(aTHX_ stdio))) {
3001 dupfd = PerlLIO_dup(fd);
3004 result = PerlSIO_fclose(stdio);
3005 /* We treat error from stdio as success if we invalidated
3006 errno may NOT be expected EBADF
3008 if (invalidate && result != 0) {
3013 /* in SOCKS case let close() determine return value */
3017 PerlLIO_dup2(dupfd,fd);
3018 PerlLIO_close(dupfd);
3025 PerlIOStdio_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3027 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3031 STDCHAR *buf = (STDCHAR *) vbuf;
3033 * Perl is expecting PerlIO_getc() to fill the buffer Linux's
3034 * stdio does not do that for fread()
3036 int ch = PerlSIO_fgetc(s);
3043 got = PerlSIO_fread(vbuf, 1, count, s);
3044 if (got >= 0 || errno != EINTR)
3047 SETERRNO(0,0); /* just in case */
3053 PerlIOStdio_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3056 FILE *s = PerlIOSelf(f, PerlIOStdio)->stdio;
3058 #ifdef STDIO_BUFFER_WRITABLE
3059 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3060 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3061 STDCHAR *base = PerlIO_get_base(f);
3062 SSize_t cnt = PerlIO_get_cnt(f);
3063 STDCHAR *ptr = PerlIO_get_ptr(f);
3064 SSize_t avail = ptr - base;
3066 if (avail > count) {
3070 Move(buf-avail,ptr,avail,STDCHAR);
3073 PerlIO_set_ptrcnt(f,ptr,cnt+avail);
3074 if (PerlSIO_feof(s) && unread >= 0)
3075 PerlSIO_clearerr(s);
3080 if (PerlIO_has_cntptr(f)) {
3081 /* We can get pointer to buffer but not its base
3082 Do ungetc() but check chars are ending up in the
3085 STDCHAR *eptr = (STDCHAR*)PerlSIO_get_ptr(s);
3086 STDCHAR *buf = ((STDCHAR *) vbuf) + count;
3088 int ch = *--buf & 0xFF;
3089 if (ungetc(ch,s) != ch) {
3090 /* ungetc did not work */
3093 if ((STDCHAR*)PerlSIO_get_ptr(s) != --eptr || ((*eptr & 0xFF) != ch)) {
3094 /* Did not change pointer as expected */
3095 fgetc(s); /* get char back again */
3105 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3111 PerlIOStdio_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3115 got = PerlSIO_fwrite(vbuf, 1, count,
3116 PerlIOSelf(f, PerlIOStdio)->stdio);
3117 if (got >= 0 || errno != EINTR)
3120 SETERRNO(0,0); /* just in case */
3126 PerlIOStdio_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3128 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3129 return PerlSIO_fseek(stdio, offset, whence);
3133 PerlIOStdio_tell(pTHX_ PerlIO *f)
3135 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3136 return PerlSIO_ftell(stdio);
3140 PerlIOStdio_flush(pTHX_ PerlIO *f)
3142 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3143 if (PerlIOBase(f)->flags & PERLIO_F_CANWRITE) {
3144 return PerlSIO_fflush(stdio);
3149 * FIXME: This discards ungetc() and pre-read stuff which is not
3150 * right if this is just a "sync" from a layer above Suspect right
3151 * design is to do _this_ but not have layer above flush this
3152 * layer read-to-read
3155 * Not writeable - sync by attempting a seek
3158 if (PerlSIO_fseek(stdio, (Off_t) 0, SEEK_CUR) != 0)
3166 PerlIOStdio_eof(pTHX_ PerlIO *f)
3168 return PerlSIO_feof(PerlIOSelf(f, PerlIOStdio)->stdio);
3172 PerlIOStdio_error(pTHX_ PerlIO *f)
3174 return PerlSIO_ferror(PerlIOSelf(f, PerlIOStdio)->stdio);
3178 PerlIOStdio_clearerr(pTHX_ PerlIO *f)
3180 PerlSIO_clearerr(PerlIOSelf(f, PerlIOStdio)->stdio);
3184 PerlIOStdio_setlinebuf(pTHX_ PerlIO *f)
3186 #ifdef HAS_SETLINEBUF
3187 PerlSIO_setlinebuf(PerlIOSelf(f, PerlIOStdio)->stdio);
3189 PerlSIO_setvbuf(PerlIOSelf(f, PerlIOStdio)->stdio, Nullch, _IOLBF, 0);
3195 PerlIOStdio_get_base(pTHX_ PerlIO *f)
3197 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3198 return (STDCHAR*)PerlSIO_get_base(stdio);
3202 PerlIOStdio_get_bufsiz(pTHX_ PerlIO *f)
3204 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3205 return PerlSIO_get_bufsiz(stdio);
3209 #ifdef USE_STDIO_PTR
3211 PerlIOStdio_get_ptr(pTHX_ PerlIO *f)
3213 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3214 return (STDCHAR*)PerlSIO_get_ptr(stdio);
3218 PerlIOStdio_get_cnt(pTHX_ PerlIO *f)
3220 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3221 return PerlSIO_get_cnt(stdio);
3225 PerlIOStdio_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3227 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3229 #ifdef STDIO_PTR_LVALUE
3230 PerlSIO_set_ptr(stdio, (void*)ptr); /* LHS STDCHAR* cast non-portable */
3231 #ifdef STDIO_PTR_LVAL_SETS_CNT
3232 if (PerlSIO_get_cnt(stdio) != (cnt)) {
3233 assert(PerlSIO_get_cnt(stdio) == (cnt));
3236 #if (!defined(STDIO_PTR_LVAL_NOCHANGE_CNT))
3238 * Setting ptr _does_ change cnt - we are done
3242 #else /* STDIO_PTR_LVALUE */
3244 #endif /* STDIO_PTR_LVALUE */
3247 * Now (or only) set cnt
3249 #ifdef STDIO_CNT_LVALUE
3250 PerlSIO_set_cnt(stdio, cnt);
3251 #else /* STDIO_CNT_LVALUE */
3252 #if (defined(STDIO_PTR_LVALUE) && defined(STDIO_PTR_LVAL_SETS_CNT))
3253 PerlSIO_set_ptr(stdio,
3254 PerlSIO_get_ptr(stdio) + (PerlSIO_get_cnt(stdio) -
3256 #else /* STDIO_PTR_LVAL_SETS_CNT */
3258 #endif /* STDIO_PTR_LVAL_SETS_CNT */
3259 #endif /* STDIO_CNT_LVALUE */
3266 PerlIOStdio_fill(pTHX_ PerlIO *f)
3268 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
3271 * fflush()ing read-only streams can cause trouble on some stdio-s
3273 if ((PerlIOBase(f)->flags & PERLIO_F_CANWRITE)) {
3274 if (PerlSIO_fflush(stdio) != 0)
3277 c = PerlSIO_fgetc(stdio);
3281 #if (defined(STDIO_PTR_LVALUE) && (defined(STDIO_CNT_LVALUE) || defined(STDIO_PTR_LVAL_SETS_CNT)))
3283 #ifdef STDIO_BUFFER_WRITABLE
3284 if (PerlIO_fast_gets(f) && PerlIO_has_base(f)) {
3285 /* Fake ungetc() to the real buffer in case system's ungetc
3288 STDCHAR *base = (STDCHAR*)PerlSIO_get_base(stdio);
3289 SSize_t cnt = PerlSIO_get_cnt(stdio);
3290 STDCHAR *ptr = (STDCHAR*)PerlSIO_get_ptr(stdio);
3291 if (ptr == base+1) {
3292 *--ptr = (STDCHAR) c;
3293 PerlIOStdio_set_ptrcnt(aTHX_ f,ptr,cnt+1);
3294 if (PerlSIO_feof(stdio))
3295 PerlSIO_clearerr(stdio);
3301 if (PerlIO_has_cntptr(f)) {
3303 if (PerlIOStdio_unread(aTHX_ f,&ch,1) == 1) {
3310 /* An ungetc()d char is handled separately from the regular
3311 * buffer, so we stuff it in the buffer ourselves.
3312 * Should never get called as should hit code above
3314 *(--((*stdio)->_ptr)) = (unsigned char) c;
3317 /* If buffer snoop scheme above fails fall back to
3320 if (PerlSIO_ungetc(c, stdio) != c)
3328 PerlIO_funcs PerlIO_stdio = {
3329 sizeof(PerlIO_funcs),
3331 sizeof(PerlIOStdio),
3332 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3336 PerlIOBase_binmode, /* binmode */
3350 PerlIOStdio_clearerr,
3351 PerlIOStdio_setlinebuf,
3353 PerlIOStdio_get_base,
3354 PerlIOStdio_get_bufsiz,
3359 #ifdef USE_STDIO_PTR
3360 PerlIOStdio_get_ptr,
3361 PerlIOStdio_get_cnt,
3362 # if defined(HAS_FAST_STDIO) && defined(USE_FAST_STDIO)
3363 PerlIOStdio_set_ptrcnt,
3366 # endif /* HAS_FAST_STDIO && USE_FAST_STDIO */
3371 #endif /* USE_STDIO_PTR */
3374 /* Note that calls to PerlIO_exportFILE() are reversed using
3375 * PerlIO_releaseFILE(), not importFILE. */
3377 PerlIO_exportFILE(PerlIO * f, const char *mode)
3381 if (PerlIOValid(f)) {
3384 if (!mode || !*mode) {
3385 mode = PerlIO_modestr(f, buf);
3387 stdio = PerlSIO_fdopen(PerlIO_fileno(f), mode);
3390 /* De-link any lower layers so new :stdio sticks */
3392 if ((f = PerlIO_push(aTHX_ f, &PerlIO_stdio, buf, Nullsv))) {
3393 PerlIOStdio *s = PerlIOSelf(f, PerlIOStdio);
3395 /* Link previous lower layers under new one */
3399 /* restore layers list */
3409 PerlIO_findFILE(PerlIO *f)
3413 if (l->tab == &PerlIO_stdio) {
3414 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3417 l = *PerlIONext(&l);
3419 /* Uses fallback "mode" via PerlIO_modestr() in PerlIO_exportFILE */
3420 return PerlIO_exportFILE(f, Nullch);
3423 /* Use this to reverse PerlIO_exportFILE calls. */
3425 PerlIO_releaseFILE(PerlIO *p, FILE *f)
3429 if (l->tab == &PerlIO_stdio) {
3430 PerlIOStdio *s = PerlIOSelf(&l, PerlIOStdio);
3431 if (s->stdio == f) {
3433 PerlIO_pop(aTHX_ p);
3442 /*--------------------------------------------------------------------------------------*/
3444 * perlio buffer layer
3448 PerlIOBuf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
3450 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3451 int fd = PerlIO_fileno(f);
3452 if (fd >= 0 && PerlLIO_isatty(fd)) {
3453 PerlIOBase(f)->flags |= PERLIO_F_LINEBUF | PERLIO_F_TTY;
3455 if (*PerlIONext(f)) {
3456 Off_t posn = PerlIO_tell(PerlIONext(f));
3457 if (posn != (Off_t) - 1) {
3461 return PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
3465 PerlIOBuf_open(pTHX_ PerlIO_funcs *self, PerlIO_list_t *layers,
3466 IV n, const char *mode, int fd, int imode, int perm,
3467 PerlIO *f, int narg, SV **args)
3469 if (PerlIOValid(f)) {
3470 PerlIO *next = PerlIONext(f);
3471 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIOBase(next)->tab);
3472 next = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3474 if (!next || (*PerlIOBase(f)->tab->Pushed) (aTHX_ f, mode, PerlIOArg, self) != 0) {
3479 PerlIO_funcs *tab = PerlIO_layer_fetch(aTHX_ layers, n - 1, PerlIO_default_btm());
3487 f = (*tab->Open) (aTHX_ tab, layers, n - 1, mode, fd, imode, perm,
3490 if (PerlIO_push(aTHX_ f, self, mode, PerlIOArg) == 0) {
3492 * if push fails during open, open fails. close will pop us.
3497 fd = PerlIO_fileno(f);
3498 if (init && fd == 2) {
3500 * Initial stderr is unbuffered
3502 PerlIOBase(f)->flags |= PERLIO_F_UNBUF;
3504 #ifdef PERLIO_USING_CRLF
3505 # ifdef PERLIO_IS_BINMODE_FD
3506 if (PERLIO_IS_BINMODE_FD(fd))
3507 PerlIO_binmode(aTHX_ f, '<'/*not used*/, O_BINARY, Nullch);
3511 * do something about failing setmode()? --jhi
3513 PerlLIO_setmode(fd, O_BINARY);
3522 * This "flush" is akin to sfio's sync in that it handles files in either
3523 * read or write state
3526 PerlIOBuf_flush(pTHX_ PerlIO *f)
3528 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3530 PerlIO *n = PerlIONext(f);
3531 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF) {
3533 * write() the buffer
3535 STDCHAR *buf = b->buf;
3537 while (p < b->ptr) {
3538 SSize_t count = PerlIO_write(n, p, b->ptr - p);
3542 else if (count < 0 || PerlIO_error(n)) {
3543 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3548 b->posn += (p - buf);
3550 else if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3551 STDCHAR *buf = PerlIO_get_base(f);
3553 * Note position change
3555 b->posn += (b->ptr - buf);
3556 if (b->ptr < b->end) {
3557 /* We did not consume all of it - try and seek downstream to
3558 our logical position
3560 if (PerlIOValid(n) && PerlIO_seek(n, b->posn, SEEK_SET) == 0) {
3561 /* Reload n as some layers may pop themselves on seek */
3562 b->posn = PerlIO_tell(n = PerlIONext(f));
3565 /* Seek failed (e.g. pipe or tty). Do NOT clear buffer or pre-read
3566 data is lost for good - so return saying "ok" having undone
3569 b->posn -= (b->ptr - buf);
3574 b->ptr = b->end = b->buf;
3575 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3576 /* We check for Valid because of dubious decision to make PerlIO_flush(NULL) flush all */
3577 if (PerlIOValid(n) && PerlIO_flush(n) != 0)
3583 PerlIOBuf_fill(pTHX_ PerlIO *f)
3585 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3586 PerlIO *n = PerlIONext(f);
3589 * Down-stream flush is defined not to loose read data so is harmless.
3590 * we would not normally be fill'ing if there was data left in anycase.
3592 if (PerlIO_flush(f) != 0)
3594 if (PerlIOBase(f)->flags & PERLIO_F_TTY)
3595 PerlIOBase_flush_linebuf(aTHX);
3598 PerlIO_get_base(f); /* allocate via vtable */
3600 b->ptr = b->end = b->buf;
3602 if (!PerlIOValid(n)) {
3603 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3607 if (PerlIO_fast_gets(n)) {
3609 * Layer below is also buffered. We do _NOT_ want to call its
3610 * ->Read() because that will loop till it gets what we asked for
3611 * which may hang on a pipe etc. Instead take anything it has to
3612 * hand, or ask it to fill _once_.
3614 avail = PerlIO_get_cnt(n);
3616 avail = PerlIO_fill(n);
3618 avail = PerlIO_get_cnt(n);
3620 if (!PerlIO_error(n) && PerlIO_eof(n))
3625 STDCHAR *ptr = PerlIO_get_ptr(n);
3626 SSize_t cnt = avail;
3627 if (avail > (SSize_t)b->bufsiz)
3629 Copy(ptr, b->buf, avail, STDCHAR);
3630 PerlIO_set_ptrcnt(n, ptr + avail, cnt - avail);
3634 avail = PerlIO_read(n, b->ptr, b->bufsiz);
3638 PerlIOBase(f)->flags |= PERLIO_F_EOF;
3640 PerlIOBase(f)->flags |= PERLIO_F_ERROR;
3643 b->end = b->buf + avail;
3644 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3649 PerlIOBuf_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
3651 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3652 if (PerlIOValid(f)) {
3655 return PerlIOBase_read(aTHX_ f, vbuf, count);
3661 PerlIOBuf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3663 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
3664 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3667 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
3672 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3674 * Buffer is already a read buffer, we can overwrite any chars
3675 * which have been read back to buffer start
3677 avail = (b->ptr - b->buf);
3681 * Buffer is idle, set it up so whole buffer is available for
3685 b->end = b->buf + avail;
3687 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3689 * Buffer extends _back_ from where we are now
3691 b->posn -= b->bufsiz;
3693 if (avail > (SSize_t) count) {
3695 * If we have space for more than count, just move count
3703 * In simple stdio-like ungetc() case chars will be already
3706 if (buf != b->ptr) {
3707 Copy(buf, b->ptr, avail, STDCHAR);
3711 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3715 unread += PerlIOBase_unread(aTHX_ f, vbuf, count);
3721 PerlIOBuf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
3723 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3724 const STDCHAR *buf = (const STDCHAR *) vbuf;
3728 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
3730 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
3731 if (PerlIO_flush(f) != 0) {
3736 SSize_t avail = b->bufsiz - (b->ptr - b->buf);
3737 if ((SSize_t) count < avail)
3739 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
3740 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
3755 Copy(buf, b->ptr, avail, STDCHAR);
3762 if (b->ptr >= (b->buf + b->bufsiz))
3765 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
3771 PerlIOBuf_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3774 if ((code = PerlIO_flush(f)) == 0) {
3775 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3776 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
3777 code = PerlIO_seek(PerlIONext(f), offset, whence);
3779 b->posn = PerlIO_tell(PerlIONext(f));
3786 PerlIOBuf_tell(pTHX_ PerlIO *f)
3788 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3790 * b->posn is file position where b->buf was read, or will be written
3792 Off_t posn = b->posn;
3793 if ((PerlIOBase(f)->flags & PERLIO_F_APPEND) &&
3794 (PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
3796 /* As O_APPEND files are normally shared in some sense it is better
3801 /* when file is NOT shared then this is sufficient */
3802 PerlIO_seek(PerlIONext(f),0, SEEK_END);
3804 posn = b->posn = PerlIO_tell(PerlIONext(f));
3808 * If buffer is valid adjust position by amount in buffer
3810 posn += (b->ptr - b->buf);
3816 PerlIOBuf_popped(pTHX_ PerlIO *f)
3818 IV code = PerlIOBase_popped(aTHX_ f);
3819 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3820 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3824 b->ptr = b->end = b->buf;
3825 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3830 PerlIOBuf_close(pTHX_ PerlIO *f)
3832 IV code = PerlIOBase_close(aTHX_ f);
3833 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3834 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3838 b->ptr = b->end = b->buf;
3839 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
3844 PerlIOBuf_get_ptr(pTHX_ PerlIO *f)
3846 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3853 PerlIOBuf_get_cnt(pTHX_ PerlIO *f)
3855 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3858 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF)
3859 return (b->end - b->ptr);
3864 PerlIOBuf_get_base(pTHX_ PerlIO *f)
3866 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3871 Newz('B',b->buf,b->bufsiz, STDCHAR);
3873 b->buf = (STDCHAR *) & b->oneword;
3874 b->bufsiz = sizeof(b->oneword);
3883 PerlIOBuf_bufsiz(pTHX_ PerlIO *f)
3885 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3888 return (b->end - b->buf);
3892 PerlIOBuf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3894 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3898 if (PerlIO_get_cnt(f) != cnt || b->ptr < b->buf) {
3899 assert(PerlIO_get_cnt(f) == cnt);
3900 assert(b->ptr >= b->buf);
3902 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
3906 PerlIOBuf_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
3908 return PerlIOBase_dup(aTHX_ f, o, param, flags);
3913 PerlIO_funcs PerlIO_perlio = {
3914 sizeof(PerlIO_funcs),
3917 PERLIO_K_BUFFERED|PERLIO_K_RAW,
3921 PerlIOBase_binmode, /* binmode */
3935 PerlIOBase_clearerr,
3936 PerlIOBase_setlinebuf,
3941 PerlIOBuf_set_ptrcnt,
3944 /*--------------------------------------------------------------------------------------*/
3946 * Temp layer to hold unread chars when cannot do it any other way
3950 PerlIOPending_fill(pTHX_ PerlIO *f)
3953 * Should never happen
3960 PerlIOPending_close(pTHX_ PerlIO *f)
3963 * A tad tricky - flush pops us, then we close new top
3966 return PerlIO_close(f);
3970 PerlIOPending_seek(pTHX_ PerlIO *f, Off_t offset, int whence)
3973 * A tad tricky - flush pops us, then we seek new top
3976 return PerlIO_seek(f, offset, whence);
3981 PerlIOPending_flush(pTHX_ PerlIO *f)
3983 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
3984 if (b->buf && b->buf != (STDCHAR *) & b->oneword) {
3988 PerlIO_pop(aTHX_ f);
3993 PerlIOPending_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
3999 PerlIOBuf_set_ptrcnt(aTHX_ f, ptr, cnt);
4004 PerlIOPending_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4006 IV code = PerlIOBase_pushed(aTHX_ f, mode, arg, tab);
4007 PerlIOl *l = PerlIOBase(f);
4009 * Our PerlIO_fast_gets must match what we are pushed on, or sv_gets()
4010 * etc. get muddled when it changes mid-string when we auto-pop.
4012 l->flags = (l->flags & ~(PERLIO_F_FASTGETS | PERLIO_F_UTF8)) |
4013 (PerlIOBase(PerlIONext(f))->
4014 flags & (PERLIO_F_FASTGETS | PERLIO_F_UTF8));
4019 PerlIOPending_read(pTHX_ PerlIO *f, void *vbuf, Size_t count)
4021 SSize_t avail = PerlIO_get_cnt(f);
4023 if ((SSize_t)count < avail)
4026 got = PerlIOBuf_read(aTHX_ f, vbuf, avail);
4027 if (got >= 0 && got < (SSize_t)count) {
4029 PerlIO_read(f, ((STDCHAR *) vbuf) + got, count - got);
4030 if (more >= 0 || got == 0)
4036 PerlIO_funcs PerlIO_pending = {
4037 sizeof(PerlIO_funcs),
4040 PERLIO_K_BUFFERED|PERLIO_K_RAW, /* not sure about RAW here */
4041 PerlIOPending_pushed,
4044 PerlIOBase_binmode, /* binmode */
4053 PerlIOPending_close,
4054 PerlIOPending_flush,
4058 PerlIOBase_clearerr,
4059 PerlIOBase_setlinebuf,
4064 PerlIOPending_set_ptrcnt,
4069 /*--------------------------------------------------------------------------------------*/
4071 * crlf - translation On read translate CR,LF to "\n" we do this by
4072 * overriding ptr/cnt entries to hand back a line at a time and keeping a
4073 * record of which nl we "lied" about. On write translate "\n" to CR,LF
4077 PerlIOBuf base; /* PerlIOBuf stuff */
4078 STDCHAR *nl; /* Position of crlf we "lied" about in the
4083 PerlIOCrlf_pushed(pTHX_ PerlIO *f, const char *mode, SV *arg, PerlIO_funcs *tab)
4086 PerlIOBase(f)->flags |= PERLIO_F_CRLF;
4087 code = PerlIOBuf_pushed(aTHX_ f, mode, arg, tab);
4089 PerlIO_debug("PerlIOCrlf_pushed f=%p %s %s fl=%08" UVxf "\n",
4090 f, PerlIOBase(f)->tab->name, (mode) ? mode : "(Null)",
4091 PerlIOBase(f)->flags);
4098 PerlIOCrlf_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4100 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4105 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4106 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4108 const STDCHAR *buf = (const STDCHAR *) vbuf + count;
4109 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4111 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4116 if (!(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4117 b->end = b->ptr = b->buf + b->bufsiz;
4118 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4119 b->posn -= b->bufsiz;
4121 while (count > 0 && b->ptr > b->buf) {
4124 if (b->ptr - 2 >= b->buf) {
4147 PerlIOCrlf_get_cnt(pTHX_ PerlIO *f)
4149 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4152 if (PerlIOBase(f)->flags & PERLIO_F_RDBUF) {
4153 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4154 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF) && (!c->nl || *c->nl == 0xd)) {
4155 STDCHAR *nl = (c->nl) ? c->nl : b->ptr;
4157 while (nl < b->end && *nl != 0xd)
4159 if (nl < b->end && *nl == 0xd) {
4161 if (nl + 1 < b->end) {
4168 * Not CR,LF but just CR
4176 * Blast - found CR as last char in buffer
4181 * They may not care, defer work as long as
4185 return (nl - b->ptr);
4189 b->ptr++; /* say we have read it as far as
4190 * flush() is concerned */
4191 b->buf++; /* Leave space in front of buffer */
4192 /* Note as we have moved buf up flush's
4194 will naturally make posn point at CR
4196 b->bufsiz--; /* Buffer is thus smaller */
4197 code = PerlIO_fill(f); /* Fetch some more */
4198 b->bufsiz++; /* Restore size for next time */
4199 b->buf--; /* Point at space */
4200 b->ptr = nl = b->buf; /* Which is what we hand
4202 *nl = 0xd; /* Fill in the CR */
4204 goto test; /* fill() call worked */
4206 * CR at EOF - just fall through
4208 /* Should we clear EOF though ??? */
4213 return (((c->nl) ? (c->nl + 1) : b->end) - b->ptr);
4219 PerlIOCrlf_set_ptrcnt(pTHX_ PerlIO *f, STDCHAR * ptr, SSize_t cnt)
4221 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4222 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4228 if (ptr == b->end && *c->nl == 0xd) {
4229 /* Defered CR at end of buffer case - we lied about count */
4241 * Test code - delete when it works ...
4243 IV flags = PerlIOBase(f)->flags;
4244 STDCHAR *chk = (c->nl) ? (c->nl+1) : b->end;
4245 if (ptr+cnt == c->nl && c->nl+1 == b->end && *c->nl == 0xd) {
4246 /* Defered CR at end of buffer case - we lied about count */
4252 Perl_croak(aTHX_ "ptr wrong %p != %p fl=%08" UVxf
4253 " nl=%p e=%p for %d", ptr, chk, flags, c->nl,
4261 * They have taken what we lied about
4269 PerlIOBase(f)->flags |= PERLIO_F_RDBUF;
4273 PerlIOCrlf_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4275 if (!(PerlIOBase(f)->flags & PERLIO_F_CRLF))
4276 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4278 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4279 const STDCHAR *buf = (const STDCHAR *) vbuf;
4280 const STDCHAR *ebuf = buf + count;
4283 if (!(PerlIOBase(f)->flags & PERLIO_F_CANWRITE))
4285 while (buf < ebuf) {
4286 STDCHAR *eptr = b->buf + b->bufsiz;
4287 PerlIOBase(f)->flags |= PERLIO_F_WRBUF;
4288 while (buf < ebuf && b->ptr < eptr) {
4290 if ((b->ptr + 2) > eptr) {
4298 *(b->ptr)++ = 0xd; /* CR */
4299 *(b->ptr)++ = 0xa; /* LF */
4301 if (PerlIOBase(f)->flags & PERLIO_F_LINEBUF) {
4311 if (b->ptr >= eptr) {
4317 if (PerlIOBase(f)->flags & PERLIO_F_UNBUF)
4319 return (buf - (STDCHAR *) vbuf);
4324 PerlIOCrlf_flush(pTHX_ PerlIO *f)
4326 PerlIOCrlf *c = PerlIOSelf(f, PerlIOCrlf);
4331 return PerlIOBuf_flush(aTHX_ f);
4335 PerlIOCrlf_binmode(pTHX_ PerlIO *f)
4337 if ((PerlIOBase(f)->flags & PERLIO_F_CRLF)) {
4338 /* In text mode - flush any pending stuff and flip it */
4339 PerlIOBase(f)->flags &= ~PERLIO_F_CRLF;
4340 #ifndef PERLIO_USING_CRLF
4341 /* CRLF is unusual case - if this is just the :crlf layer pop it */
4342 if (PerlIOBase(f)->tab == &PerlIO_crlf) {
4343 PerlIO_pop(aTHX_ f);
4350 PerlIO_funcs PerlIO_crlf = {
4351 sizeof(PerlIO_funcs),
4354 PERLIO_K_BUFFERED | PERLIO_K_CANCRLF | PERLIO_K_RAW,
4356 PerlIOBuf_popped, /* popped */
4358 PerlIOCrlf_binmode, /* binmode */
4362 PerlIOBuf_read, /* generic read works with ptr/cnt lies
4364 PerlIOCrlf_unread, /* Put CR,LF in buffer for each '\n' */
4365 PerlIOCrlf_write, /* Put CR,LF in buffer for each '\n' */
4373 PerlIOBase_clearerr,
4374 PerlIOBase_setlinebuf,
4379 PerlIOCrlf_set_ptrcnt,
4383 /*--------------------------------------------------------------------------------------*/
4385 * mmap as "buffer" layer
4389 PerlIOBuf base; /* PerlIOBuf stuff */
4390 Mmap_t mptr; /* Mapped address */
4391 Size_t len; /* mapped length */
4392 STDCHAR *bbuf; /* malloced buffer if map fails */
4395 static size_t page_size = 0;
4398 PerlIOMmap_map(pTHX_ PerlIO *f)
4400 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4401 IV flags = PerlIOBase(f)->flags;
4405 if (flags & PERLIO_F_CANREAD) {
4406 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4407 int fd = PerlIO_fileno(f);
4409 code = Fstat(fd, &st);
4410 if (code == 0 && S_ISREG(st.st_mode)) {
4411 SSize_t len = st.st_size - b->posn;
4415 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
4417 SETERRNO(0, SS_NORMAL);
4418 # ifdef _SC_PAGESIZE
4419 page_size = sysconf(_SC_PAGESIZE);
4421 page_size = sysconf(_SC_PAGE_SIZE);
4423 if ((long) page_size < 0) {
4428 (void) SvUPGRADE(error, SVt_PV);
4429 msg = SvPVx(error, n_a);
4430 Perl_croak(aTHX_ "panic: sysconf: %s",
4435 "panic: sysconf: pagesize unknown");
4439 # ifdef HAS_GETPAGESIZE
4440 page_size = getpagesize();
4442 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
4443 page_size = PAGESIZE; /* compiletime, bad */
4447 if ((IV) page_size <= 0)
4448 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
4453 * This is a hack - should never happen - open should
4456 b->posn = PerlIO_tell(PerlIONext(f));
4458 posn = (b->posn / page_size) * page_size;
4459 len = st.st_size - posn;
4460 m->mptr = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, posn);
4461 if (m->mptr && m->mptr != (Mmap_t) - 1) {
4462 #if 0 && defined(HAS_MADVISE) && defined(MADV_SEQUENTIAL)
4463 madvise(m->mptr, len, MADV_SEQUENTIAL);
4465 #if 0 && defined(HAS_MADVISE) && defined(MADV_WILLNEED)
4466 madvise(m->mptr, len, MADV_WILLNEED);
4468 PerlIOBase(f)->flags =
4469 (flags & ~PERLIO_F_EOF) | PERLIO_F_RDBUF;
4470 b->end = ((STDCHAR *) m->mptr) + len;
4471 b->buf = ((STDCHAR *) m->mptr) + (b->posn - posn);
4480 PerlIOBase(f)->flags =
4481 flags | PERLIO_F_EOF | PERLIO_F_RDBUF;
4483 b->ptr = b->end = b->ptr;
4492 PerlIOMmap_unmap(pTHX_ PerlIO *f)
4494 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4495 PerlIOBuf *b = &m->base;
4499 code = munmap(m->mptr, m->len);
4503 if (PerlIO_seek(PerlIONext(f), b->posn, SEEK_SET) != 0)
4506 b->ptr = b->end = b->buf;
4507 PerlIOBase(f)->flags &= ~(PERLIO_F_RDBUF | PERLIO_F_WRBUF);
4513 PerlIOMmap_get_base(pTHX_ PerlIO *f)
4515 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4516 PerlIOBuf *b = &m->base;
4517 if (b->buf && (PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4519 * Already have a readbuffer in progress
4525 * We have a write buffer or flushed PerlIOBuf read buffer
4527 m->bbuf = b->buf; /* save it in case we need it again */
4528 b->buf = NULL; /* Clear to trigger below */
4531 PerlIOMmap_map(aTHX_ f); /* Try and map it */
4534 * Map did not work - recover PerlIOBuf buffer if we have one
4539 b->ptr = b->end = b->buf;
4542 return PerlIOBuf_get_base(aTHX_ f);
4546 PerlIOMmap_unread(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4548 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4549 PerlIOBuf *b = &m->base;
4550 if (PerlIOBase(f)->flags & PERLIO_F_WRBUF)
4552 if (b->ptr && (b->ptr - count) >= b->buf
4553 && memEQ(b->ptr - count, vbuf, count)) {
4555 PerlIOBase(f)->flags &= ~PERLIO_F_EOF;
4560 * Loose the unwritable mapped buffer
4564 * If flush took the "buffer" see if we have one from before
4566 if (!b->buf && m->bbuf)
4569 PerlIOBuf_get_base(aTHX_ f);
4573 return PerlIOBuf_unread(aTHX_ f, vbuf, count);
4577 PerlIOMmap_write(pTHX_ PerlIO *f, const void *vbuf, Size_t count)
4579 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4580 PerlIOBuf *b = &m->base;
4581 if (!b->buf || !(PerlIOBase(f)->flags & PERLIO_F_WRBUF)) {
4583 * No, or wrong sort of, buffer
4586 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4590 * If unmap took the "buffer" see if we have one from before
4592 if (!b->buf && m->bbuf)
4595 PerlIOBuf_get_base(aTHX_ f);
4599 return PerlIOBuf_write(aTHX_ f, vbuf, count);
4603 PerlIOMmap_flush(pTHX_ PerlIO *f)
4605 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4606 PerlIOBuf *b = &m->base;
4607 IV code = PerlIOBuf_flush(aTHX_ f);
4609 * Now we are "synced" at PerlIOBuf level
4616 if (PerlIOMmap_unmap(aTHX_ f) != 0)
4621 * We seem to have a PerlIOBuf buffer which was not mapped
4622 * remember it in case we need one later
4631 PerlIOMmap_fill(pTHX_ PerlIO *f)
4633 PerlIOBuf *b = PerlIOSelf(f, PerlIOBuf);
4634 IV code = PerlIO_flush(f);
4635 if (code == 0 && !b->buf) {
4636 code = PerlIOMmap_map(aTHX_ f);
4638 if (code == 0 && !(PerlIOBase(f)->flags & PERLIO_F_RDBUF)) {
4639 code = PerlIOBuf_fill(aTHX_ f);
4645 PerlIOMmap_close(pTHX_ PerlIO *f)
4647 PerlIOMmap *m = PerlIOSelf(f, PerlIOMmap);
4648 PerlIOBuf *b = &m->base;
4649 IV code = PerlIO_flush(f);
4653 b->ptr = b->end = b->buf;
4655 if (PerlIOBuf_close(aTHX_ f) != 0)
4661 PerlIOMmap_dup(pTHX_ PerlIO *f, PerlIO *o, CLONE_PARAMS *param, int flags)
4663 return PerlIOBase_dup(aTHX_ f, o, param, flags);
4667 PerlIO_funcs PerlIO_mmap = {
4668 sizeof(PerlIO_funcs),
4671 PERLIO_K_BUFFERED|PERLIO_K_RAW,
4675 PerlIOBase_binmode, /* binmode */
4689 PerlIOBase_clearerr,
4690 PerlIOBase_setlinebuf,
4691 PerlIOMmap_get_base,
4695 PerlIOBuf_set_ptrcnt,
4698 #endif /* HAS_MMAP */
4701 Perl_PerlIO_stdin(pTHX)
4704 PerlIO_stdstreams(aTHX);
4706 return &PL_perlio[1];
4710 Perl_PerlIO_stdout(pTHX)
4713 PerlIO_stdstreams(aTHX);
4715 return &PL_perlio[2];
4719 Perl_PerlIO_stderr(pTHX)
4722 PerlIO_stdstreams(aTHX);
4724 return &PL_perlio[3];
4727 /*--------------------------------------------------------------------------------------*/
4730 PerlIO_getname(PerlIO *f, char *buf)
4735 FILE *stdio = PerlIOSelf(f, PerlIOStdio)->stdio;
4737 name = fgetname(stdio, buf);
4739 Perl_croak(aTHX_ "Don't know how to get file name");
4745 /*--------------------------------------------------------------------------------------*/
4747 * Functions which can be called on any kind of PerlIO implemented in
4751 #undef PerlIO_fdopen
4753 PerlIO_fdopen(int fd, const char *mode)
4756 return PerlIO_openn(aTHX_ Nullch, mode, fd, 0, 0, NULL, 0, NULL);
4761 PerlIO_open(const char *path, const char *mode)
4764 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4765 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, NULL, 1, &name);
4768 #undef Perlio_reopen
4770 PerlIO_reopen(const char *path, const char *mode, PerlIO *f)
4773 SV *name = sv_2mortal(newSVpvn(path, strlen(path)));
4774 return PerlIO_openn(aTHX_ Nullch, mode, -1, 0, 0, f, 1, &name);
4779 PerlIO_getc(PerlIO *f)
4783 SSize_t count = PerlIO_read(f, buf, 1);
4785 return (unsigned char) buf[0];
4790 #undef PerlIO_ungetc
4792 PerlIO_ungetc(PerlIO *f, int ch)
4797 if (PerlIO_unread(f, &buf, 1) == 1)
4805 PerlIO_putc(PerlIO *f, int ch)
4809 return PerlIO_write(f, &buf, 1);
4814 PerlIO_puts(PerlIO *f, const char *s)
4817 STRLEN len = strlen(s);
4818 return PerlIO_write(f, s, len);
4821 #undef PerlIO_rewind
4823 PerlIO_rewind(PerlIO *f)
4826 PerlIO_seek(f, (Off_t) 0, SEEK_SET);
4830 #undef PerlIO_vprintf
4832 PerlIO_vprintf(PerlIO *f, const char *fmt, va_list ap)
4835 SV *sv = newSVpvn("", 0);
4841 Perl_va_copy(ap, apc);
4842 sv_vcatpvf(sv, fmt, &apc);
4844 sv_vcatpvf(sv, fmt, &ap);
4847 wrote = PerlIO_write(f, s, len);
4852 #undef PerlIO_printf
4854 PerlIO_printf(PerlIO *f, const char *fmt, ...)
4859 result = PerlIO_vprintf(f, fmt, ap);
4864 #undef PerlIO_stdoutf
4866 PerlIO_stdoutf(const char *fmt, ...)
4872 result = PerlIO_vprintf(PerlIO_stdout(), fmt, ap);
4877 #undef PerlIO_tmpfile
4879 PerlIO_tmpfile(void)
4885 GV *gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4889 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT,
4890 newSVpvn("File::Temp", 10), Nullsv, Nullsv, Nullsv);
4891 gv = gv_fetchpv("File::Temp::tempfile", FALSE, SVt_PVCV);
4892 GvIMPORTED_CV_on(gv);
4896 if (gv && GvCV(gv)) {
4902 if (call_sv((SV*)GvCV(gv), G_SCALAR)) {
4903 GV *gv = (GV*)SvRV(newSVsv(*PL_stack_sp--));
4904 IO *io = gv ? GvIO(gv) : 0;
4905 fd = io ? PerlIO_fileno(IoIFP(io)) : -1;
4914 f = PerlIO_fdopen(fd, "w+");
4917 PerlIOBase(f)->flags |= PERLIO_F_TEMP;
4918 PerlLIO_unlink(SvPVX(sv));
4929 #endif /* USE_SFIO */
4930 #endif /* PERLIO_IS_STDIO */
4932 /*======================================================================================*/
4934 * Now some functions in terms of above which may be needed even if we are
4935 * not in true PerlIO mode
4939 #undef PerlIO_setpos
4941 PerlIO_setpos(PerlIO *f, SV *pos)
4946 Off_t *posn = (Off_t *) SvPV(pos, len);
4947 if (f && len == sizeof(Off_t))
4948 return PerlIO_seek(f, *posn, SEEK_SET);
4950 SETERRNO(EINVAL, SS_IVCHAN);
4954 #undef PerlIO_setpos
4956 PerlIO_setpos(PerlIO *f, SV *pos)
4961 Fpos_t *fpos = (Fpos_t *) SvPV(pos, len);
4962 if (f && len == sizeof(Fpos_t)) {
4963 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4964 return fsetpos64(f, fpos);
4966 return fsetpos(f, fpos);
4970 SETERRNO(EINVAL, SS_IVCHAN);
4976 #undef PerlIO_getpos
4978 PerlIO_getpos(PerlIO *f, SV *pos)
4981 Off_t posn = PerlIO_tell(f);
4982 sv_setpvn(pos, (char *) &posn, sizeof(posn));
4983 return (posn == (Off_t) - 1) ? -1 : 0;
4986 #undef PerlIO_getpos
4988 PerlIO_getpos(PerlIO *f, SV *pos)
4993 #if defined(USE_64_BIT_STDIO) && defined(USE_FSETPOS64)
4994 code = fgetpos64(f, &fpos);
4996 code = fgetpos(f, &fpos);
4998 sv_setpvn(pos, (char *) &fpos, sizeof(fpos));
5003 #if (defined(PERLIO_IS_STDIO) || !defined(USE_SFIO)) && !defined(HAS_VPRINTF)
5006 vprintf(char *pat, char *args)
5008 _doprnt(pat, args, stdout);
5009 return 0; /* wrong, but perl doesn't use the return
5014 vfprintf(FILE *fd, char *pat, char *args)
5016 _doprnt(pat, args, fd);
5017 return 0; /* wrong, but perl doesn't use the return
5023 #ifndef PerlIO_vsprintf
5025 PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
5027 int val = vsprintf(s, fmt, ap);
5029 if (strlen(s) >= (STRLEN) n) {
5031 (void) PerlIO_puts(Perl_error_log,
5032 "panic: sprintf overflow - memory corrupted!\n");
5040 #ifndef PerlIO_sprintf
5042 PerlIO_sprintf(char *s, int n, const char *fmt, ...)
5047 result = PerlIO_vsprintf(s, n, fmt, ap);