4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
6 * by Larry Wall and others
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
27 #ifdef PERL_IS_MINIPERL
28 # define USE_SITECUSTOMIZE
32 #define PERL_IN_PERL_C
34 #include "patchlevel.h" /* for local_patches */
41 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
46 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
48 # include <sys/wait.h>
56 char control[CMSG_SPACE(sizeof(int))];
73 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
74 char *getenv (char *); /* Usually in <stdlib.h> */
77 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
79 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
80 /* Drop everything. Heck, don't even try to call it */
81 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
83 /* Drop almost everything */
84 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
87 #define CALL_BODY_SUB(myop) \
88 if (PL_op == (myop)) \
89 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
93 #define CALL_LIST_BODY(cv) \
94 PUSHMARK(PL_stack_sp); \
95 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
98 S_init_tls_and_interp(PerlInterpreter *my_perl)
102 PERL_SET_INTERP(my_perl);
103 #if defined(USE_ITHREADS)
106 PERL_SET_THX(my_perl);
109 MUTEX_INIT(&PL_dollarzero_mutex);
110 MUTEX_INIT(&PL_my_ctx_mutex);
113 #if defined(USE_ITHREADS)
116 /* This always happens for non-ithreads */
119 PERL_SET_THX(my_perl);
124 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
127 Perl_sys_init(int* argc, char*** argv)
131 PERL_ARGS_ASSERT_SYS_INIT;
133 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
134 PERL_UNUSED_ARG(argv);
135 PERL_SYS_INIT_BODY(argc, argv);
139 Perl_sys_init3(int* argc, char*** argv, char*** env)
143 PERL_ARGS_ASSERT_SYS_INIT3;
145 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
146 PERL_UNUSED_ARG(argv);
147 PERL_UNUSED_ARG(env);
148 PERL_SYS_INIT3_BODY(argc, argv, env);
155 if (!PL_veto_cleanup) {
156 PERL_SYS_TERM_BODY();
161 #ifdef PERL_IMPLICIT_SYS
163 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
164 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
165 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
166 struct IPerlDir* ipD, struct IPerlSock* ipS,
167 struct IPerlProc* ipP)
169 PerlInterpreter *my_perl;
171 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
173 /* Newx() needs interpreter, so call malloc() instead */
174 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
175 S_init_tls_and_interp(my_perl);
176 Zero(my_perl, 1, PerlInterpreter);
186 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
193 =head1 Embedding Functions
195 =for apidoc perl_alloc
197 Allocates a new Perl interpreter. See L<perlembed>.
205 PerlInterpreter *my_perl;
207 /* Newx() needs interpreter, so call malloc() instead */
208 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
210 S_init_tls_and_interp(my_perl);
211 #ifndef PERL_TRACK_MEMPOOL
212 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
214 Zero(my_perl, 1, PerlInterpreter);
215 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
219 #endif /* PERL_IMPLICIT_SYS */
222 =for apidoc perl_construct
224 Initializes a new Perl interpreter. See L<perlembed>.
230 perl_construct(pTHXx)
234 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
238 PL_perl_destruct_level = 1;
240 PERL_UNUSED_ARG(my_perl);
241 if (PL_perl_destruct_level > 0)
244 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
246 /* set read-only and try to insure than we wont see REFCNT==0
249 SvREADONLY_on(&PL_sv_undef);
250 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
252 sv_setpv(&PL_sv_no,PL_No);
253 /* value lookup in void context - happens to have the side effect
254 of caching the numeric forms. However, as &PL_sv_no doesn't contain
255 a string that is a valid numer, we have to turn the public flags by
261 SvREADONLY_on(&PL_sv_no);
262 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
264 sv_setpv(&PL_sv_yes,PL_Yes);
267 SvREADONLY_on(&PL_sv_yes);
268 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
270 SvREADONLY_on(&PL_sv_placeholder);
271 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
273 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
274 #ifdef PERL_USES_PL_PIDSTATUS
275 PL_pidstatus = newHV();
278 PL_rs = newSVpvs("\n");
288 SET_NUMERIC_STANDARD();
290 #if defined(LOCAL_PATCH_COUNT)
291 PL_localpatches = local_patches; /* For possible -v */
294 #ifdef HAVE_INTERP_INTERN
298 PerlIO_init(aTHX); /* Hook to IO system */
300 PL_fdpid = newAV(); /* for remembering popen pids by fd */
301 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
302 PL_errors = newSVpvs("");
303 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
304 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
305 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
307 /* First entry is a list of empty elements. It needs to be initialised
308 else all hell breaks loose in S_find_uninit_var(). */
309 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
310 PL_regex_pad = AvARRAY(PL_regex_padav);
312 #ifdef USE_REENTRANT_API
313 Perl_reentrant_init(aTHX);
316 /* Note that strtab is a rather special HV. Assumptions are made
317 about not iterating on it, and not adding tie magic to it.
318 It is properly deallocated in perl_destruct() */
321 HvSHAREKEYS_off(PL_strtab); /* mandatory */
322 hv_ksplit(PL_strtab, 512);
324 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
325 _dyld_lookup_and_bind
326 ("__environ", (unsigned long *) &environ_pointer, NULL);
330 # ifdef USE_ENVIRON_ARRAY
331 PL_origenviron = environ;
335 /* Use sysconf(_SC_CLK_TCK) if available, if not
336 * available or if the sysconf() fails, use the HZ.
337 * BeOS has those, but returns the wrong value.
338 * The HZ if not originally defined has been by now
339 * been defined as CLK_TCK, if available. */
340 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
341 PL_clocktick = sysconf(_SC_CLK_TCK);
342 if (PL_clocktick <= 0)
346 PL_stashcache = newHV();
348 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
349 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
352 if (!PL_mmap_page_size) {
353 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
355 SETERRNO(0, SS_NORMAL);
357 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
359 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
361 if ((long) PL_mmap_page_size < 0) {
363 SV * const error = ERRSV;
364 SvUPGRADE(error, SVt_PV);
365 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
368 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
372 # ifdef HAS_GETPAGESIZE
373 PL_mmap_page_size = getpagesize();
375 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
376 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
380 if (PL_mmap_page_size <= 0)
381 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
382 (IV) PL_mmap_page_size);
384 #endif /* HAS_MMAP */
386 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
387 PL_timesbase.tms_utime = 0;
388 PL_timesbase.tms_stime = 0;
389 PL_timesbase.tms_cutime = 0;
390 PL_timesbase.tms_cstime = 0;
393 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
395 PL_registered_mros = newHV();
396 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
397 HvMAX(PL_registered_mros) = 0;
403 =for apidoc nothreadhook
405 Stub that provides thread hook for perl_destruct when there are
412 Perl_nothreadhook(pTHX)
418 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
420 Perl_dump_sv_child(pTHX_ SV *sv)
423 const int sock = PL_dumper_fd;
424 const int debug_fd = PerlIO_fileno(Perl_debug_log);
425 union control_un control;
428 struct cmsghdr *cmptr;
430 unsigned char buffer[256];
432 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
434 if(sock == -1 || debug_fd == -1)
437 PerlIO_flush(Perl_debug_log);
439 /* All these shenanigans are to pass a file descriptor over to our child for
440 it to dump out to. We can't let it hold open the file descriptor when it
441 forks, as the file descriptor it will dump to can turn out to be one end
442 of pipe that some other process will wait on for EOF. (So as it would
443 be open, the wait would be forever.) */
445 msg.msg_control = control.control;
446 msg.msg_controllen = sizeof(control.control);
447 /* We're a connected socket so we don't need a destination */
453 cmptr = CMSG_FIRSTHDR(&msg);
454 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
455 cmptr->cmsg_level = SOL_SOCKET;
456 cmptr->cmsg_type = SCM_RIGHTS;
457 *((int *)CMSG_DATA(cmptr)) = 1;
459 vec[0].iov_base = (void*)&sv;
460 vec[0].iov_len = sizeof(sv);
461 got = sendmsg(sock, &msg, 0);
464 perror("Debug leaking scalars parent sendmsg failed");
467 if(got < sizeof(sv)) {
468 perror("Debug leaking scalars parent short sendmsg");
472 /* Return protocol is
474 unsigned char: length of location string (0 for empty)
475 unsigned char*: string (not terminated)
477 vec[0].iov_base = (void*)&returned_errno;
478 vec[0].iov_len = sizeof(returned_errno);
479 vec[1].iov_base = buffer;
482 got = readv(sock, vec, 2);
485 perror("Debug leaking scalars parent read failed");
486 PerlIO_flush(PerlIO_stderr());
489 if(got < sizeof(returned_errno) + 1) {
490 perror("Debug leaking scalars parent short read");
491 PerlIO_flush(PerlIO_stderr());
496 got = read(sock, buffer + 1, *buffer);
498 perror("Debug leaking scalars parent read 2 failed");
499 PerlIO_flush(PerlIO_stderr());
504 perror("Debug leaking scalars parent short read 2");
505 PerlIO_flush(PerlIO_stderr());
510 if (returned_errno || *buffer) {
511 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
512 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
513 returned_errno, strerror(returned_errno));
519 =for apidoc perl_destruct
521 Shuts down a Perl interpreter. See L<perlembed>.
530 VOL signed char destruct_level; /* see possible values in intrpvar.h */
532 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
536 PERL_ARGS_ASSERT_PERL_DESTRUCT;
538 PERL_UNUSED_ARG(my_perl);
541 assert(PL_scopestack_ix == 1);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c) {
565 PL_phase = PERL_PHASE_END;
566 call_list(PL_scopestack_ix, PL_endav);
572 assert(PL_scopestack_ix == 0);
574 /* Need to flush since END blocks can produce output */
577 if (PL_threadhook(aTHX)) {
578 /* Threads hook has vetoed further cleanup */
579 PL_veto_cleanup = TRUE;
583 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
584 if (destruct_level != 0) {
585 /* Fork here to create a child. Our child's job is to preserve the
586 state of scalars prior to destruction, so that we can instruct it
587 to dump any scalars that we later find have leaked.
588 There's no subtlety in this code - it assumes POSIX, and it doesn't
592 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
593 perror("Debug leaking scalars socketpair failed");
599 perror("Debug leaking scalars fork failed");
603 /* We are the child */
604 const int sock = fd[1];
605 const int debug_fd = PerlIO_fileno(Perl_debug_log);
608 /* Our success message is an integer 0, and a char 0 */
609 static const char success[sizeof(int) + 1] = {0};
613 /* We need to close all other file descriptors otherwise we end up
614 with interesting hangs, where the parent closes its end of a
615 pipe, and sits waiting for (another) child to terminate. Only
616 that child never terminates, because it never gets EOF, because
617 we also have the far end of the pipe open. We even need to
618 close the debugging fd, because sometimes it happens to be one
619 end of a pipe, and a process is waiting on the other end for
620 EOF. Normally it would be closed at some point earlier in
621 destruction, but if we happen to cause the pipe to remain open,
622 EOF never occurs, and we get an infinite hang. Hence all the
623 games to pass in a file descriptor if it's actually needed. */
625 f = sysconf(_SC_OPEN_MAX);
627 where = "sysconf failed";
638 union control_un control;
641 struct cmsghdr *cmptr;
645 msg.msg_control = control.control;
646 msg.msg_controllen = sizeof(control.control);
647 /* We're a connected socket so we don't need a source */
651 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
653 vec[0].iov_base = (void*)⌖
654 vec[0].iov_len = sizeof(target);
656 got = recvmsg(sock, &msg, 0);
661 where = "recv failed";
664 if(got < sizeof(target)) {
665 where = "short recv";
669 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
673 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
674 where = "wrong cmsg_len";
677 if(cmptr->cmsg_level != SOL_SOCKET) {
678 where = "wrong cmsg_level";
681 if(cmptr->cmsg_type != SCM_RIGHTS) {
682 where = "wrong cmsg_type";
686 got_fd = *(int*)CMSG_DATA(cmptr);
687 /* For our last little bit of trickery, put the file descriptor
688 back into Perl_debug_log, as if we never actually closed it
690 if(got_fd != debug_fd) {
691 if (dup2(got_fd, debug_fd) == -1) {
698 PerlIO_flush(Perl_debug_log);
700 got = write(sock, &success, sizeof(success));
703 where = "write failed";
706 if(got < sizeof(success)) {
707 where = "short write";
714 int send_errno = errno;
715 unsigned char length = (unsigned char) strlen(where);
716 struct iovec failure[3] = {
717 {(void*)&send_errno, sizeof(send_errno)},
719 {(void*)where, length}
721 int got = writev(sock, failure, 3);
722 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
723 in the parent if we try to read from the socketpair after the
724 child has exited, even if there was data to read.
725 So sleep a bit to give the parent a fighting chance of
728 _exit((got == -1) ? errno : 0);
732 PL_dumper_fd = fd[0];
737 /* We must account for everything. */
739 /* Destroy the main CV and syntax tree */
740 /* Do this now, because destroying ops can cause new SVs to be generated
741 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
742 PL_curcop to point to a valid op from which the filename structure
744 PL_curcop = &PL_compiling;
746 /* ensure comppad/curpad to refer to main's pad */
747 if (CvPADLIST(PL_main_cv)) {
748 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
750 op_free(PL_main_root);
753 PL_main_start = NULL;
754 /* note that PL_main_cv isn't usually actually freed at this point,
755 * due to the CvOUTSIDE refs from subs compiled within it. It will
756 * get freed once all the subs are freed in sv_clean_all(), for
757 * destruct_level > 0 */
758 SvREFCNT_dec(PL_main_cv);
760 PL_phase = PERL_PHASE_DESTRUCT;
762 /* Tell PerlIO we are about to tear things apart in case
763 we have layers which are using resources that should
767 PerlIO_destruct(aTHX);
769 if (PL_sv_objcount) {
771 * Try to destruct global references. We do this first so that the
772 * destructors and destructees still exist. Some sv's might remain.
773 * Non-referenced objects are on their own.
779 /* unhook hooks which will soon be, or use, destroyed data */
780 SvREFCNT_dec(PL_warnhook);
782 SvREFCNT_dec(PL_diehook);
785 /* call exit list functions */
786 while (PL_exitlistlen-- > 0)
787 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
789 Safefree(PL_exitlist);
794 SvREFCNT_dec(PL_registered_mros);
796 /* jettison our possibly duplicated environment */
797 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
798 * so we certainly shouldn't free it here
801 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
802 if (environ != PL_origenviron && !PL_use_safe_putenv
804 /* only main thread can free environ[0] contents */
805 && PL_curinterp == aTHX
811 for (i = 0; environ[i]; i++)
812 safesysfree(environ[i]);
814 /* Must use safesysfree() when working with environ. */
815 safesysfree(environ);
817 environ = PL_origenviron;
820 #endif /* !PERL_MICRO */
822 if (destruct_level == 0) {
824 DEBUG_P(debprofdump());
826 #if defined(PERLIO_LAYERS)
827 /* No more IO - including error messages ! */
828 PerlIO_cleanup(aTHX);
831 CopFILE_free(&PL_compiling);
832 CopSTASH_free(&PL_compiling);
834 /* The exit() function will do everything that needs doing. */
839 /* the syntax tree is shared between clones
840 * so op_free(PL_main_root) only ReREFCNT_dec's
841 * REGEXPs in the parent interpreter
842 * we need to manually ReREFCNT_dec for the clones
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
854 /* XXX can PL_parser still be non-null here? */
855 if(PL_parser && PL_parser->rsfp) {
856 (void)PerlIO_close(PL_parser->rsfp);
857 PL_parser->rsfp = NULL;
861 Safefree(PL_splitstr);
871 PL_doswitches = FALSE;
872 PL_dowarn = G_WARN_OFF;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
879 SvREFCNT_dec(PL_apiversion);
882 SvREFCNT_dec(PL_e_script);
888 /* magical thingies */
890 SvREFCNT_dec(PL_ofsgv); /* *, */
893 SvREFCNT_dec(PL_ors_sv); /* $\ */
896 SvREFCNT_dec(PL_rs); /* $/ */
899 Safefree(PL_osname); /* $^O */
902 SvREFCNT_dec(PL_statname);
906 /* defgv, aka *_ should be taken care of elsewhere */
909 Safefree(PL_efloatbuf);
913 /* startup and shutdown function lists */
914 SvREFCNT_dec(PL_beginav);
915 SvREFCNT_dec(PL_beginav_save);
916 SvREFCNT_dec(PL_endav);
917 SvREFCNT_dec(PL_checkav);
918 SvREFCNT_dec(PL_checkav_save);
919 SvREFCNT_dec(PL_unitcheckav);
920 SvREFCNT_dec(PL_unitcheckav_save);
921 SvREFCNT_dec(PL_initav);
923 PL_beginav_save = NULL;
926 PL_checkav_save = NULL;
927 PL_unitcheckav = NULL;
928 PL_unitcheckav_save = NULL;
931 /* shortcuts just get cleared */
940 PL_last_in_gv = NULL;
952 SvREFCNT_dec(PL_argvout_stack);
953 PL_argvout_stack = NULL;
955 SvREFCNT_dec(PL_modglobal);
957 SvREFCNT_dec(PL_preambleav);
958 PL_preambleav = NULL;
959 SvREFCNT_dec(PL_subname);
961 #ifdef PERL_USES_PL_PIDSTATUS
962 SvREFCNT_dec(PL_pidstatus);
965 SvREFCNT_dec(PL_toptarget);
967 SvREFCNT_dec(PL_bodytarget);
968 PL_bodytarget = NULL;
969 PL_formtarget = NULL;
971 /* free locale stuff */
972 #ifdef USE_LOCALE_COLLATE
973 Safefree(PL_collation_name);
974 PL_collation_name = NULL;
977 #ifdef USE_LOCALE_NUMERIC
978 Safefree(PL_numeric_name);
979 PL_numeric_name = NULL;
980 SvREFCNT_dec(PL_numeric_radix_sv);
981 PL_numeric_radix_sv = NULL;
984 /* clear utf8 character classes */
985 SvREFCNT_dec(PL_utf8_alnum);
986 SvREFCNT_dec(PL_utf8_ascii);
987 SvREFCNT_dec(PL_utf8_alpha);
988 SvREFCNT_dec(PL_utf8_space);
989 SvREFCNT_dec(PL_utf8_cntrl);
990 SvREFCNT_dec(PL_utf8_graph);
991 SvREFCNT_dec(PL_utf8_digit);
992 SvREFCNT_dec(PL_utf8_upper);
993 SvREFCNT_dec(PL_utf8_lower);
994 SvREFCNT_dec(PL_utf8_print);
995 SvREFCNT_dec(PL_utf8_punct);
996 SvREFCNT_dec(PL_utf8_xdigit);
997 SvREFCNT_dec(PL_utf8_mark);
998 SvREFCNT_dec(PL_utf8_toupper);
999 SvREFCNT_dec(PL_utf8_totitle);
1000 SvREFCNT_dec(PL_utf8_tolower);
1001 SvREFCNT_dec(PL_utf8_tofold);
1002 SvREFCNT_dec(PL_utf8_idstart);
1003 SvREFCNT_dec(PL_utf8_idcont);
1004 SvREFCNT_dec(PL_utf8_foldclosures);
1005 PL_utf8_alnum = NULL;
1006 PL_utf8_ascii = NULL;
1007 PL_utf8_alpha = NULL;
1008 PL_utf8_space = NULL;
1009 PL_utf8_cntrl = NULL;
1010 PL_utf8_graph = NULL;
1011 PL_utf8_digit = NULL;
1012 PL_utf8_upper = NULL;
1013 PL_utf8_lower = NULL;
1014 PL_utf8_print = NULL;
1015 PL_utf8_punct = NULL;
1016 PL_utf8_xdigit = NULL;
1017 PL_utf8_mark = NULL;
1018 PL_utf8_toupper = NULL;
1019 PL_utf8_totitle = NULL;
1020 PL_utf8_tolower = NULL;
1021 PL_utf8_tofold = NULL;
1022 PL_utf8_idstart = NULL;
1023 PL_utf8_idcont = NULL;
1024 PL_utf8_foldclosures = NULL;
1026 if (!specialWARN(PL_compiling.cop_warnings))
1027 PerlMemShared_free(PL_compiling.cop_warnings);
1028 PL_compiling.cop_warnings = NULL;
1029 cophh_free(CopHINTHASH_get(&PL_compiling));
1030 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1031 CopFILE_free(&PL_compiling);
1032 CopSTASH_free(&PL_compiling);
1034 /* Prepare to destruct main symbol table. */
1037 /* break ref loop *:: <=> %:: */
1038 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1041 SvREFCNT_dec(PL_curstname);
1042 PL_curstname = NULL;
1044 /* clear queued errors */
1045 SvREFCNT_dec(PL_errors);
1048 SvREFCNT_dec(PL_isarev);
1051 if (destruct_level >= 2) {
1052 if (PL_scopestack_ix != 0)
1053 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1054 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1055 (long)PL_scopestack_ix);
1056 if (PL_savestack_ix != 0)
1057 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1058 "Unbalanced saves: %ld more saves than restores\n",
1059 (long)PL_savestack_ix);
1060 if (PL_tmps_floor != -1)
1061 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1062 (long)PL_tmps_floor + 1);
1063 if (cxstack_ix != -1)
1064 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1065 (long)cxstack_ix + 1);
1068 #ifdef PERL_IMPLICIT_CONTEXT
1069 /* the entries in this list are allocated via SV PVX's, so get freed
1070 * in sv_clean_all */
1071 Safefree(PL_my_cxt_list);
1074 /* Now absolutely destruct everything, somehow or other, loops or no. */
1076 /* the 2 is for PL_fdpid and PL_strtab */
1077 while (sv_clean_all() > 2)
1080 AvREAL_off(PL_fdpid); /* no surviving entries */
1081 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1084 #ifdef HAVE_INTERP_INTERN
1088 /* Destruct the global string table. */
1090 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1091 * so that sv_free() won't fail on them.
1092 * Now that the global string table is using a single hunk of memory
1093 * for both HE and HEK, we either need to explicitly unshare it the
1094 * correct way, or actually free things here.
1097 const I32 max = HvMAX(PL_strtab);
1098 HE * const * const array = HvARRAY(PL_strtab);
1099 HE *hent = array[0];
1102 if (hent && ckWARN_d(WARN_INTERNAL)) {
1103 HE * const next = HeNEXT(hent);
1104 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1105 "Unbalanced string table refcount: (%ld) for \"%s\"",
1106 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1113 hent = array[riter];
1118 HvARRAY(PL_strtab) = 0;
1119 HvTOTALKEYS(PL_strtab) = 0;
1121 SvREFCNT_dec(PL_strtab);
1124 /* free the pointer tables used for cloning */
1125 ptr_table_free(PL_ptr_table);
1126 PL_ptr_table = (PTR_TBL_t*)NULL;
1129 /* free special SVs */
1131 SvREFCNT(&PL_sv_yes) = 0;
1132 sv_clear(&PL_sv_yes);
1133 SvANY(&PL_sv_yes) = NULL;
1134 SvFLAGS(&PL_sv_yes) = 0;
1136 SvREFCNT(&PL_sv_no) = 0;
1137 sv_clear(&PL_sv_no);
1138 SvANY(&PL_sv_no) = NULL;
1139 SvFLAGS(&PL_sv_no) = 0;
1143 for (i=0; i<=2; i++) {
1144 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1145 sv_clear(PERL_DEBUG_PAD(i));
1146 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1147 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1151 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1152 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1154 #ifdef DEBUG_LEAKING_SCALARS
1155 if (PL_sv_count != 0) {
1160 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1161 svend = &sva[SvREFCNT(sva)];
1162 for (sv = sva + 1; sv < svend; ++sv) {
1163 if (SvTYPE(sv) != SVTYPEMASK) {
1164 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1166 " refcnt=%"UVuf pTHX__FORMAT "\n"
1167 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1169 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1171 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1173 sv->sv_debug_inpad ? "for" : "by",
1174 sv->sv_debug_optype ?
1175 PL_op_name[sv->sv_debug_optype]: "(none)",
1176 PTR2UV(sv->sv_debug_parent),
1179 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1180 Perl_dump_sv_child(aTHX_ sv);
1186 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1190 /* Wait for up to 4 seconds for child to terminate.
1191 This seems to be the least effort way of timing out on reaping
1193 struct timeval waitfor = {4, 0};
1194 int sock = PL_dumper_fd;
1198 FD_SET(sock, &rset);
1199 select(sock + 1, &rset, NULL, NULL, &waitfor);
1200 waitpid(child, &status, WNOHANG);
1205 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1211 #ifdef PERL_DEBUG_READONLY_OPS
1217 #if defined(PERLIO_LAYERS)
1218 /* No more IO - including error messages ! */
1219 PerlIO_cleanup(aTHX);
1222 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1223 as currently layers use it rather than NULL as a marker
1224 for no arg - and will try and SvREFCNT_dec it.
1226 SvREFCNT(&PL_sv_undef) = 0;
1227 SvREADONLY_off(&PL_sv_undef);
1229 Safefree(PL_origfilename);
1230 PL_origfilename = NULL;
1231 Safefree(PL_reg_start_tmp);
1232 PL_reg_start_tmp = (char**)NULL;
1233 PL_reg_start_tmpl = 0;
1234 Safefree(PL_reg_curpm);
1235 Safefree(PL_reg_poscache);
1236 free_tied_hv_pool();
1237 Safefree(PL_op_mask);
1238 Safefree(PL_psig_name);
1239 PL_psig_name = (SV**)NULL;
1240 PL_psig_ptr = (SV**)NULL;
1242 /* We need to NULL PL_psig_pend first, so that
1243 signal handlers know not to use it */
1244 int *psig_save = PL_psig_pend;
1245 PL_psig_pend = (int*)NULL;
1246 Safefree(psig_save);
1250 PL_tainting = FALSE;
1251 PL_taint_warn = FALSE;
1252 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1255 DEBUG_P(debprofdump());
1257 #ifdef USE_REENTRANT_API
1258 Perl_reentrant_free(aTHX);
1263 while (PL_regmatch_slab) {
1264 regmatch_slab *s = PL_regmatch_slab;
1265 PL_regmatch_slab = PL_regmatch_slab->next;
1269 /* As the absolutely last thing, free the non-arena SV for mess() */
1272 /* we know that type == SVt_PVMG */
1274 /* it could have accumulated taint magic */
1277 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1278 moremagic = mg->mg_moremagic;
1279 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1281 Safefree(mg->mg_ptr);
1285 /* we know that type >= SVt_PV */
1286 SvPV_free(PL_mess_sv);
1287 Safefree(SvANY(PL_mess_sv));
1288 Safefree(PL_mess_sv);
1295 =for apidoc perl_free
1297 Releases a Perl interpreter. See L<perlembed>.
1307 PERL_ARGS_ASSERT_PERL_FREE;
1309 if (PL_veto_cleanup)
1312 #ifdef PERL_TRACK_MEMPOOL
1315 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1316 * value as we're probably hunting memory leaks then
1318 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1319 if (!s || atoi(s) == 0) {
1320 const U32 old_debug = PL_debug;
1321 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1322 thread at thread exit. */
1324 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1325 "free this thread's memory\n");
1326 PL_debug &= ~ DEBUG_m_FLAG;
1328 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1329 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1330 PL_debug = old_debug;
1335 #if defined(WIN32) || defined(NETWARE)
1336 # if defined(PERL_IMPLICIT_SYS)
1339 void *host = nw_internal_host;
1341 void *host = w32_internal_host;
1343 PerlMem_free(aTHXx);
1345 nw_delete_internal_host(host);
1347 win32_delete_internal_host(host);
1351 PerlMem_free(aTHXx);
1354 PerlMem_free(aTHXx);
1358 #if defined(USE_ITHREADS)
1359 /* provide destructors to clean up the thread key when libperl is unloaded */
1360 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1362 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1363 #pragma fini "perl_fini"
1364 #elif defined(__sun) && !defined(__GNUC__)
1365 #pragma fini (perl_fini)
1369 #if defined(__GNUC__)
1370 __attribute__((destructor))
1375 if (PL_curinterp && !PL_veto_cleanup)
1380 #endif /* THREADS */
1383 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1386 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1387 PL_exitlist[PL_exitlistlen].fn = fn;
1388 PL_exitlist[PL_exitlistlen].ptr = ptr;
1392 #ifdef HAS_PROCSELFEXE
1393 /* This is a function so that we don't hold on to MAXPATHLEN
1394 bytes of stack longer than necessary
1397 S_procself_val(pTHX_ SV *sv, const char *arg0)
1399 char buf[MAXPATHLEN];
1400 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1402 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1403 includes a spurious NUL which will cause $^X to fail in system
1404 or backticks (this will prevent extensions from being built and
1405 many tests from working). readlink is not meant to add a NUL.
1406 Normal readlink works fine.
1408 if (len > 0 && buf[len-1] == '\0') {
1412 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1413 returning the text "unknown" from the readlink rather than the path
1414 to the executable (or returning an error from the readlink). Any valid
1415 path has a '/' in it somewhere, so use that to validate the result.
1416 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1418 if (len > 0 && memchr(buf, '/', len)) {
1419 sv_setpvn(sv,buf,len);
1425 #endif /* HAS_PROCSELFEXE */
1428 S_set_caret_X(pTHX) {
1430 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1432 #ifdef HAS_PROCSELFEXE
1433 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1436 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1438 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1445 =for apidoc perl_parse
1447 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1453 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1460 PERL_ARGS_ASSERT_PERL_PARSE;
1461 #ifndef MULTIPLICITY
1462 PERL_UNUSED_ARG(my_perl);
1465 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1466 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1467 * This MUST be done before any hash stores or fetches take place.
1468 * If you set PL_rehash_seed (and presumably also PL_rehash_seed_set)
1469 * yourself, it is your responsibility to provide a good random seed!
1470 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1471 if (!PL_rehash_seed_set)
1472 PL_rehash_seed = get_hash_seed();
1474 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1476 if (s && (atoi(s) == 1))
1477 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1479 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1484 if (PL_origalen != 0) {
1485 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1488 /* Set PL_origalen be the sum of the contiguous argv[]
1489 * elements plus the size of the env in case that it is
1490 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1491 * as the maximum modifiable length of $0. In the worst case
1492 * the area we are able to modify is limited to the size of
1493 * the original argv[0]. (See below for 'contiguous', though.)
1495 const char *s = NULL;
1498 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1499 /* Do the mask check only if the args seem like aligned. */
1501 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1503 /* See if all the arguments are contiguous in memory. Note
1504 * that 'contiguous' is a loose term because some platforms
1505 * align the argv[] and the envp[]. If the arguments look
1506 * like non-aligned, assume that they are 'strictly' or
1507 * 'traditionally' contiguous. If the arguments look like
1508 * aligned, we just check that they are within aligned
1509 * PTRSIZE bytes. As long as no system has something bizarre
1510 * like the argv[] interleaved with some other data, we are
1511 * fine. (Did I just evoke Murphy's Law?) --jhi */
1512 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1514 for (i = 1; i < PL_origargc; i++) {
1515 if ((PL_origargv[i] == s + 1
1517 || PL_origargv[i] == s + 2
1522 (PL_origargv[i] > s &&
1524 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1535 #ifndef PERL_USE_SAFE_PUTENV
1536 /* Can we grab env area too to be used as the area for $0? */
1537 if (s && PL_origenviron && !PL_use_safe_putenv) {
1538 if ((PL_origenviron[0] == s + 1)
1541 (PL_origenviron[0] > s &&
1542 PL_origenviron[0] <=
1543 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1546 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1547 s = PL_origenviron[0];
1550 my_setenv("NoNe SuCh", NULL);
1551 /* Force copy of environment. */
1552 for (i = 1; PL_origenviron[i]; i++) {
1553 if (PL_origenviron[i] == s + 1
1556 (PL_origenviron[i] > s &&
1557 PL_origenviron[i] <=
1558 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1561 s = PL_origenviron[i];
1569 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1571 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1576 /* Come here if running an undumped a.out. */
1578 PL_origfilename = savepv(argv[0]);
1579 PL_do_undump = FALSE;
1580 cxstack_ix = -1; /* start label stack again */
1582 assert (!PL_tainted);
1584 S_set_caret_X(aTHX);
1586 init_postdump_symbols(argc,argv,env);
1591 op_free(PL_main_root);
1592 PL_main_root = NULL;
1594 PL_main_start = NULL;
1595 SvREFCNT_dec(PL_main_cv);
1599 oldscope = PL_scopestack_ix;
1600 PL_dowarn = G_WARN_OFF;
1605 parse_body(env,xsinit);
1606 if (PL_unitcheckav) {
1607 call_list(oldscope, PL_unitcheckav);
1610 PL_phase = PERL_PHASE_CHECK;
1611 call_list(oldscope, PL_checkav);
1619 /* my_exit() was called */
1620 while (PL_scopestack_ix > oldscope)
1623 PL_curstash = PL_defstash;
1624 if (PL_unitcheckav) {
1625 call_list(oldscope, PL_unitcheckav);
1628 PL_phase = PERL_PHASE_CHECK;
1629 call_list(oldscope, PL_checkav);
1634 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1642 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1643 miniperl, and we need to see those flags reflected in the values here. */
1645 /* What this returns is subject to change. Use the public interface in Config.
1648 S_Internals_V(pTHX_ CV *cv)
1651 #ifdef LOCAL_PATCH_COUNT
1652 const int local_patch_count = LOCAL_PATCH_COUNT;
1654 const int local_patch_count = 0;
1656 const int entries = 3 + local_patch_count;
1658 static char non_bincompat_options[] =
1665 # ifdef PERL_DISABLE_PMC
1668 # ifdef PERL_DONT_CREATE_GVSV
1669 " PERL_DONT_CREATE_GVSV"
1671 # ifdef PERL_EXTERNAL_GLOB
1672 " PERL_EXTERNAL_GLOB"
1674 # ifdef PERL_IS_MINIPERL
1677 # ifdef PERL_MALLOC_WRAP
1680 # ifdef PERL_MEM_LOG
1683 # ifdef PERL_MEM_LOG_NOIMPL
1684 " PERL_MEM_LOG_NOIMPL"
1686 # ifdef PERL_PRESERVE_IVUV
1687 " PERL_PRESERVE_IVUV"
1689 # ifdef PERL_USE_DEVEL
1692 # ifdef PERL_USE_SAFE_PUTENV
1693 " PERL_USE_SAFE_PUTENV"
1695 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1696 " USE_ATTRIBUTES_FOR_PERLIO"
1698 # ifdef USE_FAST_STDIO
1704 # ifdef USE_LOCALE_COLLATE
1705 " USE_LOCALE_COLLATE"
1707 # ifdef USE_LOCALE_CTYPE
1710 # ifdef USE_LOCALE_NUMERIC
1711 " USE_LOCALE_NUMERIC"
1713 # ifdef USE_PERL_ATOF
1716 # ifdef USE_SITECUSTOMIZE
1717 " USE_SITECUSTOMIZE"
1720 PERL_UNUSED_ARG(cv);
1721 PERL_UNUSED_ARG(items);
1723 EXTEND(SP, entries);
1725 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1726 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1727 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1731 PUSHs(Perl_newSVpvn_flags(aTHX_
1732 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1735 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1739 PUSHs(&PL_sv_undef);
1742 for (i = 1; i <= local_patch_count; i++) {
1743 /* This will be an undef, if PL_localpatches[i] is NULL. */
1744 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1750 #define INCPUSH_UNSHIFT 0x01
1751 #define INCPUSH_ADD_OLD_VERS 0x02
1752 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1753 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1754 #define INCPUSH_NOT_BASEDIR 0x10
1755 #define INCPUSH_CAN_RELOCATE 0x20
1756 #define INCPUSH_ADD_SUB_DIRS \
1757 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1760 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1764 int argc = PL_origargc;
1765 char **argv = PL_origargv;
1766 const char *scriptname = NULL;
1767 VOL bool dosearch = FALSE;
1769 bool doextract = FALSE;
1770 const char *cddir = NULL;
1771 #ifdef USE_SITECUSTOMIZE
1772 bool minus_f = FALSE;
1774 SV *linestr_sv = newSV_type(SVt_PVIV);
1775 bool add_read_e_script = FALSE;
1777 PL_phase = PERL_PHASE_START;
1779 SvGROW(linestr_sv, 80);
1780 sv_setpvs(linestr_sv,"");
1786 for (argc--,argv++; argc > 0; argc--,argv++) {
1787 if (argv[0][0] != '-' || !argv[0][1])
1793 #ifndef PERL_STRICT_CR
1817 if ((s = moreswitches(s)))
1822 CHECK_MALLOC_TOO_LATE_FOR('t');
1823 if( !PL_tainting ) {
1824 PL_taint_warn = TRUE;
1830 CHECK_MALLOC_TOO_LATE_FOR('T');
1832 PL_taint_warn = FALSE;
1840 forbid_setid('e', FALSE);
1842 PL_e_script = newSVpvs("");
1843 add_read_e_script = TRUE;
1846 sv_catpv(PL_e_script, s);
1848 sv_catpv(PL_e_script, argv[1]);
1852 Perl_croak(aTHX_ "No code specified for -%c", c);
1853 sv_catpvs(PL_e_script, "\n");
1857 #ifdef USE_SITECUSTOMIZE
1863 case 'I': /* -I handled both here and in moreswitches() */
1864 forbid_setid('I', FALSE);
1865 if (!*++s && (s=argv[1]) != NULL) {
1869 STRLEN len = strlen(s);
1870 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1873 Perl_croak(aTHX_ "No directory specified for -I");
1876 forbid_setid('S', FALSE);
1885 opts_prog = newSVpvs("use Config; Config::_V()");
1889 opts_prog = Perl_newSVpvf(aTHX_
1890 "use Config; Config::config_vars(qw%c%s%c)",
1894 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1895 /* don't look for script or read stdin */
1896 scriptname = BIT_BUCKET;
1908 if (!*++s || isSPACE(*s)) {
1912 /* catch use of gnu style long options */
1913 if (strEQ(s, "version")) {
1917 if (strEQ(s, "help")) {
1924 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1935 #ifndef SECURE_INTERNAL_GETENV
1938 (s = PerlEnv_getenv("PERL5OPT")))
1942 if (*s == '-' && *(s+1) == 'T') {
1943 CHECK_MALLOC_TOO_LATE_FOR('T');
1945 PL_taint_warn = FALSE;
1948 char *popt_copy = NULL;
1961 if (!strchr("CDIMUdmtwW", *s))
1962 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1966 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1967 s = popt_copy + (s - d);
1975 if( !PL_tainting ) {
1976 PL_taint_warn = TRUE;
1987 #if defined(USE_SITECUSTOMIZE)
1989 /* The games with local $! are to avoid setting errno if there is no
1990 sitecustomize script. */
1991 # ifdef PERL_IS_MINIPERL
1992 AV *const inc = GvAV(PL_incgv);
1993 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
1996 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1998 "BEGIN { do {local $!; -f '%"SVf"/buildcustomize.pl'} && do '%"SVf"/buildcustomize.pl' }", *inc0, *inc0));
2001 /* SITELIB_EXP is a function call on Win32. */
2002 const char *const sitelib = SITELIB_EXP;
2003 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2005 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
2011 scriptname = argv[0];
2014 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2016 else if (scriptname == NULL) {
2018 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2024 /* Set $^X early so that it can be used for relocatable paths in @INC */
2025 assert (!PL_tainted);
2027 S_set_caret_X(aTHX);
2032 bool suidscript = FALSE;
2034 open_script(scriptname, dosearch, &suidscript, &rsfp);
2036 validate_suid(validarg, scriptname, fdscript, suidscript,
2040 # if defined(SIGCHLD) || defined(SIGCLD)
2043 # define SIGCHLD SIGCLD
2045 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2046 if (sigstate == (Sighandler_t) SIG_IGN) {
2047 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2048 "Can't ignore signal CHLD, forcing to default");
2049 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2057 /* This will croak if suidscript is true, as -x cannot be used with
2059 forbid_setid('x', suidscript);
2060 /* Hence you can't get here if suidscript is true */
2062 find_beginning(linestr_sv, rsfp);
2063 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2064 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2068 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2069 CvUNIQUE_on(PL_compcv);
2071 CvPADLIST(PL_compcv) = pad_new(0);
2073 PL_isarev = newHV();
2076 boot_core_UNIVERSAL();
2078 newXS("Internals::V", S_Internals_V, __FILE__);
2081 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2083 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2089 # ifdef HAS_SOCKS5_INIT
2090 socks5_init(argv[0]);
2096 init_predump_symbols();
2097 /* init_postdump_symbols not currently designed to be called */
2098 /* more than once (ENV isn't cleared first, for example) */
2099 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2101 init_postdump_symbols(argc,argv,env);
2103 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2104 * or explicitly in some platforms.
2105 * locale.c:Perl_init_i18nl10n() if the environment
2106 * look like the user wants to use UTF-8. */
2107 #if defined(__SYMBIAN32__)
2108 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2110 # ifndef PERL_IS_MINIPERL
2112 /* Requires init_predump_symbols(). */
2113 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2118 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2119 * and the default open disciplines. */
2120 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2121 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2123 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2124 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2125 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2127 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2128 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2129 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2131 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2132 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2133 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2135 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2136 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2139 sv_setpvs(sv, ":utf8\0:utf8");
2141 sv_setpvs(sv, ":utf8\0");
2144 sv_setpvs(sv, "\0:utf8");
2153 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2154 if (strEQ(s, "unsafe"))
2155 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2156 else if (strEQ(s, "safe"))
2157 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2159 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2166 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2170 PL_xmlfp = PerlIO_stdout();
2172 PL_xmlfp = PerlIO_open(s, "w");
2174 Perl_croak(aTHX_ "Can't open %s", s);
2176 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2182 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2183 PL_madskills = atoi(s);
2184 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2189 lex_start(linestr_sv, rsfp, 0);
2190 PL_subname = newSVpvs("main");
2192 if (add_read_e_script)
2193 filter_add(read_e_script, NULL);
2195 /* now parse the script */
2197 SETERRNO(0,SS_NORMAL);
2198 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2200 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2202 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2206 CopLINE_set(PL_curcop, 0);
2207 PL_curstash = PL_defstash;
2209 SvREFCNT_dec(PL_e_script);
2217 SAVECOPFILE(PL_curcop);
2218 SAVECOPLINE(PL_curcop);
2219 gv_check(PL_defstash);
2228 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2229 dump_mstats("after compilation:");
2234 PL_restartjmpenv = NULL;
2240 =for apidoc perl_run
2242 Tells a Perl interpreter to run. See L<perlembed>.
2255 PERL_ARGS_ASSERT_PERL_RUN;
2256 #ifndef MULTIPLICITY
2257 PERL_UNUSED_ARG(my_perl);
2260 oldscope = PL_scopestack_ix;
2268 cxstack_ix = -1; /* start context stack again */
2270 case 0: /* normal completion */
2274 case 2: /* my_exit() */
2275 while (PL_scopestack_ix > oldscope)
2278 PL_curstash = PL_defstash;
2279 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2280 PL_endav && !PL_minus_c) {
2281 PL_phase = PERL_PHASE_END;
2282 call_list(oldscope, PL_endav);
2285 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2286 dump_mstats("after execution: ");
2292 POPSTACK_TO(PL_mainstack);
2295 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2306 S_run_body(pTHX_ I32 oldscope)
2309 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2310 PL_sawampersand ? "Enabling" : "Omitting"));
2312 if (!PL_restartop) {
2316 exit(0); /* less likely to core dump than my_exit(0) */
2320 if (DEBUG_x_TEST || DEBUG_B_TEST)
2321 dump_all_perl(!DEBUG_B_TEST);
2323 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2327 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2330 if (PERLDB_SINGLE && PL_DBsingle)
2331 sv_setiv(PL_DBsingle, 1);
2333 PL_phase = PERL_PHASE_INIT;
2334 call_list(oldscope, PL_initav);
2336 #ifdef PERL_DEBUG_READONLY_OPS
2337 Perl_pending_Slabs_to_ro(aTHX);
2343 PL_phase = PERL_PHASE_RUN;
2346 PL_restartjmpenv = NULL;
2347 PL_op = PL_restartop;
2351 else if (PL_main_start) {
2352 CvDEPTH(PL_main_cv) = 1;
2353 PL_op = PL_main_start;
2361 =head1 SV Manipulation Functions
2363 =for apidoc p||get_sv
2365 Returns the SV of the specified Perl scalar. C<flags> are passed to
2366 C<gv_fetchpv>. If C<GV_ADD> is set and the
2367 Perl variable does not exist then it will be created. If C<flags> is zero
2368 and the variable does not exist then NULL is returned.
2374 Perl_get_sv(pTHX_ const char *name, I32 flags)
2378 PERL_ARGS_ASSERT_GET_SV;
2380 gv = gv_fetchpv(name, flags, SVt_PV);
2387 =head1 Array Manipulation Functions
2389 =for apidoc p||get_av
2391 Returns the AV of the specified Perl array. C<flags> are passed to
2392 C<gv_fetchpv>. If C<GV_ADD> is set and the
2393 Perl variable does not exist then it will be created. If C<flags> is zero
2394 and the variable does not exist then NULL is returned.
2400 Perl_get_av(pTHX_ const char *name, I32 flags)
2402 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2404 PERL_ARGS_ASSERT_GET_AV;
2414 =head1 Hash Manipulation Functions
2416 =for apidoc p||get_hv
2418 Returns the HV of the specified Perl hash. C<flags> are passed to
2419 C<gv_fetchpv>. If C<GV_ADD> is set and the
2420 Perl variable does not exist then it will be created. If C<flags> is zero
2421 and the variable does not exist then NULL is returned.
2427 Perl_get_hv(pTHX_ const char *name, I32 flags)
2429 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2431 PERL_ARGS_ASSERT_GET_HV;
2441 =head1 CV Manipulation Functions
2443 =for apidoc p||get_cvn_flags
2445 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2446 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2447 exist then it will be declared (which has the same effect as saying
2448 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2449 then NULL is returned.
2451 =for apidoc p||get_cv
2453 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2459 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2461 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2462 /* XXX this is probably not what they think they're getting.
2463 * It has the same effect as "sub name;", i.e. just a forward
2466 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2468 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2469 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2470 return newSUB(start_subparse(FALSE, 0),
2471 newSVOP(OP_CONST, 0, sv),
2479 /* Nothing in core calls this now, but we can't replace it with a macro and
2480 move it to mathoms.c as a macro would evaluate name twice. */
2482 Perl_get_cv(pTHX_ const char *name, I32 flags)
2484 PERL_ARGS_ASSERT_GET_CV;
2486 return get_cvn_flags(name, strlen(name), flags);
2489 /* Be sure to refetch the stack pointer after calling these routines. */
2493 =head1 Callback Functions
2495 =for apidoc p||call_argv
2497 Performs a callback to the specified Perl sub. See L<perlcall>.
2503 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2505 /* See G_* flags in cop.h */
2506 /* null terminated arg list */
2511 PERL_ARGS_ASSERT_CALL_ARGV;
2516 mXPUSHs(newSVpv(*argv,0));
2521 return call_pv(sub_name, flags);
2525 =for apidoc p||call_pv
2527 Performs a callback to the specified Perl sub. See L<perlcall>.
2533 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2534 /* name of the subroutine */
2535 /* See G_* flags in cop.h */
2537 PERL_ARGS_ASSERT_CALL_PV;
2539 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2543 =for apidoc p||call_method
2545 Performs a callback to the specified Perl method. The blessed object must
2546 be on the stack. See L<perlcall>.
2552 Perl_call_method(pTHX_ const char *methname, I32 flags)
2553 /* name of the subroutine */
2554 /* See G_* flags in cop.h */
2557 PERL_ARGS_ASSERT_CALL_METHOD;
2559 len = strlen(methname);
2561 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2562 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2565 /* May be called with any of a CV, a GV, or an SV containing the name. */
2567 =for apidoc p||call_sv
2569 Performs a callback to the Perl sub whose name is in the SV. See
2576 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2577 /* See G_* flags in cop.h */
2580 LOGOP myop; /* fake syntax tree node */
2585 bool oldcatch = CATCH_GET;
2587 OP* const oldop = PL_op;
2590 PERL_ARGS_ASSERT_CALL_SV;
2592 if (flags & G_DISCARD) {
2596 if (!(flags & G_WANT)) {
2597 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2602 Zero(&myop, 1, LOGOP);
2603 myop.op_next = NULL;
2604 if (!(flags & G_NOARGS))
2605 myop.op_flags |= OPf_STACKED;
2606 myop.op_flags |= OP_GIMME_REVERSE(flags);
2610 EXTEND(PL_stack_sp, 1);
2611 *++PL_stack_sp = sv;
2613 oldscope = PL_scopestack_ix;
2615 if (PERLDB_SUB && PL_curstash != PL_debstash
2616 /* Handle first BEGIN of -d. */
2617 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2618 /* Try harder, since this may have been a sighandler, thus
2619 * curstash may be meaningless. */
2620 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2621 && !(flags & G_NODEBUG))
2622 PL_op->op_private |= OPpENTERSUB_DB;
2624 if (flags & G_METHOD) {
2625 Zero(&method_op, 1, UNOP);
2626 method_op.op_next = PL_op;
2627 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2628 method_op.op_type = OP_METHOD;
2629 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2630 myop.op_type = OP_ENTERSUB;
2631 PL_op = (OP*)&method_op;
2634 if (!(flags & G_EVAL)) {
2636 CALL_BODY_SUB((OP*)&myop);
2637 retval = PL_stack_sp - (PL_stack_base + oldmark);
2638 CATCH_SET(oldcatch);
2641 myop.op_other = (OP*)&myop;
2643 create_eval_scope(flags|G_FAKINGEVAL);
2651 CALL_BODY_SUB((OP*)&myop);
2652 retval = PL_stack_sp - (PL_stack_base + oldmark);
2653 if (!(flags & G_KEEPERR)) {
2661 /* my_exit() was called */
2662 PL_curstash = PL_defstash;
2669 PL_restartjmpenv = NULL;
2670 PL_op = PL_restartop;
2674 PL_stack_sp = PL_stack_base + oldmark;
2675 if ((flags & G_WANT) == G_ARRAY)
2679 *++PL_stack_sp = &PL_sv_undef;
2684 if (PL_scopestack_ix > oldscope)
2685 delete_eval_scope();
2689 if (flags & G_DISCARD) {
2690 PL_stack_sp = PL_stack_base + oldmark;
2699 /* Eval a string. The G_EVAL flag is always assumed. */
2702 =for apidoc p||eval_sv
2704 Tells Perl to C<eval> the string in the SV. It supports the same flags
2705 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2711 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2713 /* See G_* flags in cop.h */
2717 UNOP myop; /* fake syntax tree node */
2718 VOL I32 oldmark = SP - PL_stack_base;
2721 OP* const oldop = PL_op;
2724 PERL_ARGS_ASSERT_EVAL_SV;
2726 if (flags & G_DISCARD) {
2733 Zero(PL_op, 1, UNOP);
2734 EXTEND(PL_stack_sp, 1);
2735 *++PL_stack_sp = sv;
2737 if (!(flags & G_NOARGS))
2738 myop.op_flags = OPf_STACKED;
2739 myop.op_next = NULL;
2740 myop.op_type = OP_ENTEREVAL;
2741 myop.op_flags |= OP_GIMME_REVERSE(flags);
2742 if (flags & G_KEEPERR)
2743 myop.op_flags |= OPf_SPECIAL;
2745 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2746 * before a PUSHEVAL, which corrupts the stack after a croak */
2747 TAINT_PROPER("eval_sv()");
2753 if (PL_op == (OP*)(&myop)) {
2754 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2756 goto fail; /* failed in compilation */
2759 retval = PL_stack_sp - (PL_stack_base + oldmark);
2760 if (!(flags & G_KEEPERR)) {
2768 /* my_exit() was called */
2769 PL_curstash = PL_defstash;
2776 PL_restartjmpenv = NULL;
2777 PL_op = PL_restartop;
2782 PL_stack_sp = PL_stack_base + oldmark;
2783 if ((flags & G_WANT) == G_ARRAY)
2787 *++PL_stack_sp = &PL_sv_undef;
2793 if (flags & G_DISCARD) {
2794 PL_stack_sp = PL_stack_base + oldmark;
2804 =for apidoc p||eval_pv
2806 Tells Perl to C<eval> the given string and return an SV* result.
2812 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2816 SV* sv = newSVpv(p, 0);
2818 PERL_ARGS_ASSERT_EVAL_PV;
2820 eval_sv(sv, G_SCALAR);
2827 if (croak_on_error && SvTRUE(ERRSV)) {
2828 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2834 /* Require a module. */
2837 =head1 Embedding Functions
2839 =for apidoc p||require_pv
2841 Tells Perl to C<require> the file named by the string argument. It is
2842 analogous to the Perl code C<eval "require '$file'">. It's even
2843 implemented that way; consider using load_module instead.
2848 Perl_require_pv(pTHX_ const char *pv)
2854 PERL_ARGS_ASSERT_REQUIRE_PV;
2856 PUSHSTACKi(PERLSI_REQUIRE);
2858 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2859 eval_sv(sv_2mortal(sv), G_DISCARD);
2865 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2867 /* This message really ought to be max 23 lines.
2868 * Removed -h because the user already knows that option. Others? */
2870 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2871 minimum of 509 character string literals. */
2872 static const char * const usage_msg[] = {
2873 " -0[octal] specify record separator (\\0, if no argument)\n"
2874 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2875 " -C[number/list] enables the listed Unicode features\n"
2876 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2877 " -d[:debugger] run program under debugger\n"
2878 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2879 " -e program one line of program (several -e's allowed, omit programfile)\n"
2880 " -E program like -e, but enables all optional features\n"
2881 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2882 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2883 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2884 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2885 " -l[octal] enable line ending processing, specifies line terminator\n"
2886 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2887 " -n assume \"while (<>) { ... }\" loop around program\n"
2888 " -p assume loop like -n but print line also, like sed\n"
2889 " -s enable rudimentary parsing for switches after programfile\n"
2890 " -S look for programfile using PATH environment variable\n",
2891 " -t enable tainting warnings\n"
2892 " -T enable tainting checks\n"
2893 " -u dump core after parsing program\n"
2894 " -U allow unsafe operations\n"
2895 " -v print version, patchlevel and license\n"
2896 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2897 " -w enable many useful warnings\n"
2898 " -W enable all warnings\n"
2899 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2900 " -X disable all warnings\n"
2902 "Run 'perldoc perl' for more help with Perl.\n\n",
2905 const char * const *p = usage_msg;
2906 PerlIO *out = PerlIO_stdout();
2908 PERL_ARGS_ASSERT_USAGE;
2911 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2914 PerlIO_puts(out, *p++);
2917 /* convert a string of -D options (or digits) into an int.
2918 * sets *s to point to the char after the options */
2922 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2924 static const char * const usage_msgd[] = {
2925 " Debugging flag values: (see also -d)\n"
2926 " p Tokenizing and parsing (with v, displays parse stack)\n"
2927 " s Stack snapshots (with v, displays all stacks)\n"
2928 " l Context (loop) stack processing\n"
2929 " t Trace execution\n"
2930 " o Method and overloading resolution\n",
2931 " c String/numeric conversions\n"
2932 " P Print profiling info, source file input state\n"
2933 " m Memory and SV allocation\n"
2934 " f Format processing\n"
2935 " r Regular expression parsing and execution\n"
2936 " x Syntax tree dump\n",
2937 " u Tainting checks\n"
2938 " H Hash dump -- usurps values()\n"
2939 " X Scratchpad allocation\n"
2942 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2943 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2944 " v Verbose: use in conjunction with other flags\n"
2945 " C Copy On Write\n"
2946 " A Consistency checks on internal structures\n"
2947 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2948 " M trace smart match resolution\n"
2949 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2954 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2957 /* if adding extra options, remember to update DEBUG_MASK */
2958 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2960 for (; isALNUM(**s); (*s)++) {
2961 const char * const d = strchr(debopts,**s);
2963 i |= 1 << (d - debopts);
2964 else if (ckWARN_d(WARN_DEBUGGING))
2965 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2966 "invalid option -D%c, use -D'' to see choices\n", **s);
2969 else if (isDIGIT(**s)) {
2971 for (; isALNUM(**s); (*s)++) ;
2973 else if (givehelp) {
2974 const char *const *p = usage_msgd;
2975 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2978 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2979 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2980 "-Dp not implemented on this platform\n");
2986 /* This routine handles any switches that can be given during run */
2989 Perl_moreswitches(pTHX_ const char *s)
2993 const char option = *s; /* used to remember option in -m/-M code */
2995 PERL_ARGS_ASSERT_MORESWITCHES;
3003 SvREFCNT_dec(PL_rs);
3004 if (s[1] == 'x' && s[2]) {
3005 const char *e = s+=2;
3011 flags = PERL_SCAN_SILENT_ILLDIGIT;
3012 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3013 if (s + numlen < e) {
3014 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3018 PL_rs = newSVpvs("");
3019 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3020 tmps = (U8*)SvPVX(PL_rs);
3021 uvchr_to_utf8(tmps, rschar);
3022 SvCUR_set(PL_rs, UNISKIP(rschar));
3027 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3028 if (rschar & ~((U8)~0))
3029 PL_rs = &PL_sv_undef;
3030 else if (!rschar && numlen >= 2)
3031 PL_rs = newSVpvs("");
3033 char ch = (char)rschar;
3034 PL_rs = newSVpvn(&ch, 1);
3037 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3042 PL_unicode = parse_unicode_opts( (const char **)&s );
3043 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3049 while (*s && !isSPACE(*s)) ++s;
3050 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3061 forbid_setid('d', FALSE);
3064 /* -dt indicates to the debugger that threads will be used */
3065 if (*s == 't' && !isALNUM(s[1])) {
3067 my_setenv("PERL5DB_THREADED", "1");
3070 /* The following permits -d:Mod to accepts arguments following an =
3071 in the fashion that -MSome::Mod does. */
3072 if (*s == ':' || *s == '=') {
3079 sv = newSVpvs("no Devel::");
3081 sv = newSVpvs("use Devel::");
3085 end = s + strlen(s);
3087 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3088 while(isALNUM(*s) || *s==':') ++s;
3090 sv_catpvn(sv, start, end - start);
3092 sv_catpvn(sv, start, s-start);
3093 /* Don't use NUL as q// delimiter here, this string goes in the
3095 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3098 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3102 PL_perldb = PERLDB_ALL;
3109 forbid_setid('D', FALSE);
3111 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3112 #else /* !DEBUGGING */
3113 if (ckWARN_d(WARN_DEBUGGING))
3114 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3115 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3116 for (s++; isALNUM(*s); s++) ;
3121 usage(PL_origargv[0]);
3124 Safefree(PL_inplace);
3125 #if defined(__CYGWIN__) /* do backup extension automagically */
3126 if (*(s+1) == '\0') {
3127 PL_inplace = savepvs(".bak");
3130 #endif /* __CYGWIN__ */
3132 const char * const start = ++s;
3133 while (*s && !isSPACE(*s))
3136 PL_inplace = savepvn(start, s - start);
3140 if (*s == '-') /* Additional switches on #! line. */
3144 case 'I': /* -I handled both here and in parse_body() */
3145 forbid_setid('I', FALSE);
3147 while (*s && isSPACE(*s))
3152 /* ignore trailing spaces (possibly followed by other switches) */
3154 for (e = p; *e && !isSPACE(*e); e++) ;
3158 } while (*p && *p != '-');
3160 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3166 Perl_croak(aTHX_ "No directory specified for -I");
3172 SvREFCNT_dec(PL_ors_sv);
3178 PL_ors_sv = newSVpvs("\n");
3179 numlen = 3 + (*s == '0');
3180 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3184 if (RsPARA(PL_rs)) {
3185 PL_ors_sv = newSVpvs("\n\n");
3188 PL_ors_sv = newSVsv(PL_rs);
3193 forbid_setid('M', FALSE); /* XXX ? */
3196 forbid_setid('m', FALSE); /* XXX ? */
3201 const char *use = "use ";
3203 /* -M-foo == 'no foo' */
3204 /* Leading space on " no " is deliberate, to make both
3205 possibilities the same length. */
3206 if (*s == '-') { use = " no "; ++s; }
3207 sv = newSVpvn(use,4);
3209 /* We allow -M'Module qw(Foo Bar)' */
3210 while(isALNUM(*s) || *s==':') {
3219 Perl_croak(aTHX_ "Module name required with -%c option",
3222 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3223 "contains single ':'",
3224 (int)(s - start), start, option);
3225 end = s + strlen(s);
3227 sv_catpvn(sv, start, end - start);
3228 if (option == 'm') {
3230 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3231 sv_catpvs( sv, " ()");
3234 sv_catpvn(sv, start, s-start);
3235 /* Use NUL as q''-delimiter. */
3236 sv_catpvs(sv, " split(/,/,q\0");
3238 sv_catpvn(sv, s, end - s);
3239 sv_catpvs(sv, "\0)");
3242 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3245 Perl_croak(aTHX_ "Missing argument to -%c", option);
3256 forbid_setid('s', FALSE);
3257 PL_doswitches = TRUE;
3271 PL_do_undump = TRUE;
3279 if (!sv_derived_from(PL_patchlevel, "version"))
3280 upg_version(PL_patchlevel, TRUE);
3283 SV* level= vstringify(PL_patchlevel);
3284 #ifdef PERL_PATCHNUM
3285 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3286 SV *num = newSVpvs(PERL_PATCHNUM "*");
3288 SV *num = newSVpvs(PERL_PATCHNUM);
3291 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3292 SvREFCNT_dec(level);
3295 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3299 PerlIO_printf(PerlIO_stdout(),
3300 "\nThis is perl " STRINGIFY(PERL_REVISION)
3301 ", version " STRINGIFY(PERL_VERSION)
3302 ", subversion " STRINGIFY(PERL_SUBVERSION)
3303 " (%"SVf") built for " ARCHNAME, level
3305 SvREFCNT_dec(level);
3308 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3309 PerlIO_printf(PerlIO_stdout(),
3310 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3311 SVfARG(vstringify(PL_patchlevel))));
3312 PerlIO_printf(PerlIO_stdout(),
3313 Perl_form(aTHX_ " built under %s at %s %s\n",
3314 OSNAME, __DATE__, __TIME__));
3315 PerlIO_printf(PerlIO_stdout(),
3316 Perl_form(aTHX_ " OS Specific Release: %s\n",
3319 #if defined(LOCAL_PATCH_COUNT)
3320 if (LOCAL_PATCH_COUNT > 0)
3321 PerlIO_printf(PerlIO_stdout(),
3322 "\n(with %d registered patch%s, "
3323 "see perl -V for more detail)",
3325 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "\n\nCopyright 1987-2011, Larry Wall\n");
3331 PerlIO_printf(PerlIO_stdout(),
3332 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3335 PerlIO_printf(PerlIO_stdout(),
3336 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3337 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3342 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "atariST series port, ++jrb bammi@cadence.com\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3357 PerlIO_printf(PerlIO_stdout(),
3358 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3361 PerlIO_printf(PerlIO_stdout(),
3362 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3365 PerlIO_printf(PerlIO_stdout(),
3366 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3369 PerlIO_printf(PerlIO_stdout(),
3370 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3373 PerlIO_printf(PerlIO_stdout(),
3374 "EPOC port by Olaf Flebbe, 1999-2002\n");
3377 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3378 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3381 #ifdef __SYMBIAN32__
3382 PerlIO_printf(PerlIO_stdout(),
3383 "Symbian port by Nokia, 2004-2005\n");
3385 #ifdef BINARY_BUILD_NOTICE
3386 BINARY_BUILD_NOTICE;
3388 PerlIO_printf(PerlIO_stdout(),
3390 Perl may be copied only under the terms of either the Artistic License or the\n\
3391 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3392 Complete documentation for Perl, including FAQ lists, should be found on\n\
3393 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3394 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3397 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3398 PL_dowarn |= G_WARN_ON;
3403 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3404 if (!specialWARN(PL_compiling.cop_warnings))
3405 PerlMemShared_free(PL_compiling.cop_warnings);
3406 PL_compiling.cop_warnings = pWARN_ALL ;
3410 PL_dowarn = G_WARN_ALL_OFF;
3411 if (!specialWARN(PL_compiling.cop_warnings))
3412 PerlMemShared_free(PL_compiling.cop_warnings);
3413 PL_compiling.cop_warnings = pWARN_NONE ;
3420 if (s[0] == '-') /* Additional switches on #! line. */
3425 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3431 #ifdef ALTERNATE_SHEBANG
3432 case 'S': /* OS/2 needs -S on "extproc" line. */
3436 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3441 /* compliments of Tom Christiansen */
3443 /* unexec() can be found in the Gnu emacs distribution */
3444 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3447 Perl_my_unexec(pTHX)
3449 PERL_UNUSED_CONTEXT;
3451 SV * prog = newSVpv(BIN_EXP, 0);
3452 SV * file = newSVpv(PL_origfilename, 0);
3456 sv_catpvs(prog, "/perl");
3457 sv_catpvs(file, ".perldump");
3459 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3460 /* unexec prints msg to stderr in case of failure */
3461 PerlProc_exit(status);
3464 # include <lib$routines.h>
3465 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3466 # elif defined(WIN32) || defined(__CYGWIN__)
3467 Perl_croak(aTHX_ "dump is not supported");
3469 ABORT(); /* for use with undump */
3474 /* initialize curinterp */
3480 # define PERLVAR(var,type)
3481 # define PERLVARA(var,n,type)
3482 # if defined(PERL_IMPLICIT_CONTEXT)
3483 # define PERLVARI(var,type,init) aTHX->var = init;
3484 # define PERLVARIC(var,type,init) aTHX->var = init;
3486 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3487 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3489 # include "intrpvar.h"
3495 # define PERLVAR(var,type)
3496 # define PERLVARA(var,n,type)
3497 # define PERLVARI(var,type,init) PL_##var = init;
3498 # define PERLVARIC(var,type,init) PL_##var = init;
3499 # include "intrpvar.h"
3506 /* As these are inside a structure, PERLVARI isn't capable of initialising
3508 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3509 PL_reg_poscache = PL_reg_starttry = NULL;
3513 S_init_main_stash(pTHX)
3518 PL_curstash = PL_defstash = newHV();
3519 /* We know that the string "main" will be in the global shared string
3520 table, so it's a small saving to use it rather than allocate another
3522 PL_curstname = newSVpvs_share("main");
3523 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3524 /* If we hadn't caused another reference to "main" to be in the shared
3525 string table above, then it would be worth reordering these two,
3526 because otherwise all we do is delete "main" from it as a consequence
3527 of the SvREFCNT_dec, only to add it again with hv_name_set */
3528 SvREFCNT_dec(GvHV(gv));
3529 hv_name_set(PL_defstash, "main", 4, 0);
3530 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3532 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3534 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3535 GvMULTI_on(PL_incgv);
3536 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3537 GvMULTI_on(PL_hintgv);
3538 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3539 SvREFCNT_inc_simple_void(PL_defgv);
3540 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3541 SvREFCNT_inc_simple_void(PL_errgv);
3542 GvMULTI_on(PL_errgv);
3543 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3544 GvMULTI_on(PL_replgv);
3545 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3546 #ifdef PERL_DONT_CREATE_GVSV
3549 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3551 PL_curstash = PL_defstash;
3552 CopSTASH_set(&PL_compiling, PL_defstash);
3553 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3554 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3556 /* We must init $/ before switches are processed. */
3557 sv_setpvs(get_sv("/", GV_ADD), "\n");
3561 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3562 bool *suidscript, PerlIO **rsfpp)
3567 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3570 PL_origfilename = savepvs("-e");
3573 /* if find_script() returns, it returns a malloc()-ed value */
3574 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3576 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3577 const char *s = scriptname + 8;
3583 * Tell apart "normal" usage of fdscript, e.g.
3584 * with bash on FreeBSD:
3585 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3586 * from usage in suidperl.
3587 * Does any "normal" usage leave garbage after the number???
3588 * Is it a mistake to use a similar /dev/fd/ construct for
3593 * Be supersafe and do some sanity-checks.
3594 * Still, can we be sure we got the right thing?
3597 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3600 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3602 scriptname = savepv(s + 1);
3603 Safefree(PL_origfilename);
3604 PL_origfilename = (char *)scriptname;
3609 CopFILE_free(PL_curcop);
3610 CopFILE_set(PL_curcop, PL_origfilename);
3611 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3612 scriptname = (char *)"";
3613 if (fdscript >= 0) {
3614 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3615 # if defined(HAS_FCNTL) && defined(F_SETFD)
3617 /* ensure close-on-exec */
3618 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3621 else if (!*scriptname) {
3622 forbid_setid(0, *suidscript);
3623 *rsfpp = PerlIO_stdin();
3626 #ifdef FAKE_BIT_BUCKET
3627 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3628 * is called) and still have the "-e" work. (Believe it or not,
3629 * a /dev/null is required for the "-e" to work because source
3630 * filter magic is used to implement it. ) This is *not* a general
3631 * replacement for a /dev/null. What we do here is create a temp
3632 * file (an empty file), open up that as the script, and then
3633 * immediately close and unlink it. Close enough for jazz. */
3634 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3635 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3636 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3637 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3638 FAKE_BIT_BUCKET_TEMPLATE
3640 const char * const err = "Failed to create a fake bit bucket";
3641 if (strEQ(scriptname, BIT_BUCKET)) {
3642 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3643 int tmpfd = mkstemp(tmpname);
3645 scriptname = tmpname;
3648 Perl_croak(aTHX_ err);
3651 scriptname = mktemp(tmpname);
3653 Perl_croak(aTHX_ err);
3658 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3659 #ifdef FAKE_BIT_BUCKET
3660 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3661 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3662 && strlen(scriptname) == sizeof(tmpname) - 1) {
3665 scriptname = BIT_BUCKET;
3667 # if defined(HAS_FCNTL) && defined(F_SETFD)
3669 /* ensure close-on-exec */
3670 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3674 /* PSz 16 Sep 03 Keep neat error message */
3676 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3678 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3679 CopFILE(PL_curcop), Strerror(errno));
3685 * I_SYSSTATVFS HAS_FSTATVFS
3687 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3688 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3689 * here so that metaconfig picks them up. */
3692 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3693 /* Don't even need this function. */
3696 S_validate_suid(pTHX_ PerlIO *rsfp)
3698 PERL_ARGS_ASSERT_VALIDATE_SUID;
3700 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3703 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3704 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3706 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3709 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3710 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3711 /* not set-id, must be wrapped */
3714 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3717 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3721 register const char *s2;
3723 PERL_ARGS_ASSERT_FIND_BEGINNING;
3725 /* skip forward in input to the real script? */
3728 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3729 Perl_croak(aTHX_ "No Perl script found in input\n");
3731 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3732 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3733 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3735 while (*s == ' ' || *s == '\t') s++;
3737 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3738 || s2[-1] == '_') s2--;
3739 if (strnEQ(s2-4,"perl",4))
3740 while ((s = moreswitches(s)))
3750 PL_uid = PerlProc_getuid();
3751 PL_euid = PerlProc_geteuid();
3752 PL_gid = PerlProc_getgid();
3753 PL_egid = PerlProc_getegid();
3755 PL_uid |= PL_gid << 16;
3756 PL_euid |= PL_egid << 16;
3758 /* Should not happen: */
3759 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3760 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3763 * Should go by suidscript, not uid!=euid: why disallow
3764 * system("ls") in scripts run from setuid things?
3765 * Or, is this run before we check arguments and set suidscript?
3766 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3767 * (We never have suidscript, can we be sure to have fdscript?)
3768 * Or must then go by UID checks? See comments in forbid_setid also.
3772 /* This is used very early in the lifetime of the program,
3773 * before even the options are parsed, so PL_tainting has
3774 * not been initialized properly. */
3776 Perl_doing_taint(int argc, char *argv[], char *envp[])
3778 #ifndef PERL_IMPLICIT_SYS
3779 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3780 * before we have an interpreter-- and the whole point of this
3781 * function is to be called at such an early stage. If you are on
3782 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3783 * "tainted because running with altered effective ids', you'll
3784 * have to add your own checks somewhere in here. The two most
3785 * known samples of 'implicitness' are Win32 and NetWare, neither
3786 * of which has much of concept of 'uids'. */
3787 int uid = PerlProc_getuid();
3788 int euid = PerlProc_geteuid();
3789 int gid = PerlProc_getgid();
3790 int egid = PerlProc_getegid();
3797 if (uid && (euid != uid || egid != gid))
3799 #endif /* !PERL_IMPLICIT_SYS */
3800 /* This is a really primitive check; environment gets ignored only
3801 * if -T are the first chars together; otherwise one gets
3802 * "Too late" message. */
3803 if ( argc > 1 && argv[1][0] == '-'
3804 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3809 /* Passing the flag as a single char rather than a string is a slight space
3810 optimisation. The only message that isn't /^-.$/ is
3811 "program input from stdin", which is substituted in place of '\0', which
3812 could never be a command line flag. */
3814 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3817 char string[3] = "-x";
3818 const char *message = "program input from stdin";
3825 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3826 if (PL_euid != PL_uid)
3827 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3828 if (PL_egid != PL_gid)
3829 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3830 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3832 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3836 Perl_init_dbargs(pTHX)
3838 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3843 /* Someone has already created it.
3844 It might have entries, and if we just turn off AvREAL(), they will
3845 "leak" until global destruction. */
3848 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3852 Perl_init_debugger(pTHX)
3855 HV * const ostash = PL_curstash;
3857 PL_curstash = PL_debstash;
3859 Perl_init_dbargs(aTHX);
3860 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3861 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3862 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3863 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3864 if (!SvIOK(PL_DBsingle))
3865 sv_setiv(PL_DBsingle, 0);
3866 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3867 if (!SvIOK(PL_DBtrace))
3868 sv_setiv(PL_DBtrace, 0);
3869 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3870 if (!SvIOK(PL_DBsignal))
3871 sv_setiv(PL_DBsignal, 0);
3872 PL_curstash = ostash;
3875 #ifndef STRESS_REALLOC
3876 #define REASONABLE(size) (size)
3878 #define REASONABLE(size) (1) /* unreasonable */
3882 Perl_init_stacks(pTHX)
3885 /* start with 128-item stack and 8K cxstack */
3886 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3887 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3888 PL_curstackinfo->si_type = PERLSI_MAIN;
3889 PL_curstack = PL_curstackinfo->si_stack;
3890 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3892 PL_stack_base = AvARRAY(PL_curstack);
3893 PL_stack_sp = PL_stack_base;
3894 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3896 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3899 PL_tmps_max = REASONABLE(128);
3901 Newx(PL_markstack,REASONABLE(32),I32);
3902 PL_markstack_ptr = PL_markstack;
3903 PL_markstack_max = PL_markstack + REASONABLE(32);
3907 Newx(PL_scopestack,REASONABLE(32),I32);
3909 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3911 PL_scopestack_ix = 0;
3912 PL_scopestack_max = REASONABLE(32);
3914 Newx(PL_savestack,REASONABLE(128),ANY);
3915 PL_savestack_ix = 0;
3916 PL_savestack_max = REASONABLE(128);
3925 while (PL_curstackinfo->si_next)
3926 PL_curstackinfo = PL_curstackinfo->si_next;
3927 while (PL_curstackinfo) {
3928 PERL_SI *p = PL_curstackinfo->si_prev;
3929 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3930 Safefree(PL_curstackinfo->si_cxstack);
3931 Safefree(PL_curstackinfo);
3932 PL_curstackinfo = p;
3934 Safefree(PL_tmps_stack);
3935 Safefree(PL_markstack);
3936 Safefree(PL_scopestack);
3938 Safefree(PL_scopestack_name);
3940 Safefree(PL_savestack);
3944 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
3946 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
3947 AV *const isa = GvAVn(gv);
3950 PERL_ARGS_ASSERT_POPULATE_ISA;
3952 if(AvFILLp(isa) != -1)
3955 /* NOTE: No support for tied ISA */
3957 va_start(args, len);
3959 const char *const parent = va_arg(args, const char*);
3964 parent_len = va_arg(args, size_t);
3966 /* Arguments are supplied with a trailing :: */
3967 assert(parent_len > 2);
3968 assert(parent[parent_len - 1] == ':');
3969 assert(parent[parent_len - 2] == ':');
3970 av_push(isa, newSVpvn(parent, parent_len - 2));
3971 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
3978 S_init_predump_symbols(pTHX)
3984 sv_setpvs(get_sv("\"", GV_ADD), " ");
3985 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3988 /* Historically, PVIOs were blessed into IO::Handle, unless
3989 FileHandle was loaded, in which case they were blessed into
3990 that. Action at a distance.
3991 However, if we simply bless into IO::Handle, we break code
3992 that assumes that PVIOs will have (among others) a seek
3993 method. IO::File inherits from IO::Handle and IO::Seekable,
3994 and provides the needed methods. But if we simply bless into
3995 it, then we break code that assumed that by loading
3996 IO::Handle, *it* would work.
3997 So a compromise is to set up the correct @IO::File::ISA,
3998 so that code that does C<use IO::Handle>; will still work.
4001 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4002 STR_WITH_LEN("IO::Handle::"),
4003 STR_WITH_LEN("IO::Seekable::"),
4004 STR_WITH_LEN("Exporter::"),
4007 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4008 GvMULTI_on(PL_stdingv);
4009 io = GvIOp(PL_stdingv);
4010 IoTYPE(io) = IoTYPE_RDONLY;
4011 IoIFP(io) = PerlIO_stdin();
4012 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4014 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4016 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4019 IoTYPE(io) = IoTYPE_WRONLY;
4020 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4022 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4024 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4026 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4027 GvMULTI_on(PL_stderrgv);
4028 io = GvIOp(PL_stderrgv);
4029 IoTYPE(io) = IoTYPE_WRONLY;
4030 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4031 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4033 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4035 PL_statname = newSV(0); /* last filename we did stat on */
4039 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4043 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4045 argc--,argv++; /* skip name of script */
4046 if (PL_doswitches) {
4047 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4051 if (argv[0][1] == '-' && !argv[0][2]) {
4055 if ((s = strchr(argv[0], '='))) {
4056 const char *const start_name = argv[0] + 1;
4057 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4058 TRUE, SVt_PV)), s + 1);
4061 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4064 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4065 GvMULTI_on(PL_argvgv);
4066 (void)gv_AVadd(PL_argvgv);
4067 av_clear(GvAVn(PL_argvgv));
4068 for (; argc > 0; argc--,argv++) {
4069 SV * const sv = newSVpv(argv[0],0);
4070 av_push(GvAVn(PL_argvgv),sv);
4071 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4072 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4075 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4076 (void)sv_utf8_decode(sv);
4082 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4087 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4089 PL_toptarget = newSV_type(SVt_PVFM);
4090 sv_setpvs(PL_toptarget, "");
4091 PL_bodytarget = newSV_type(SVt_PVFM);
4092 sv_setpvs(PL_bodytarget, "");
4093 PL_formtarget = PL_bodytarget;
4097 init_argv_symbols(argc,argv);
4099 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4100 sv_setpv(GvSV(tmpgv),PL_origfilename);
4102 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4104 bool env_is_not_environ;
4105 GvMULTI_on(PL_envgv);
4106 hv = GvHVn(PL_envgv);
4107 hv_magic(hv, NULL, PERL_MAGIC_env);
4109 #ifdef USE_ENVIRON_ARRAY
4110 /* Note that if the supplied env parameter is actually a copy
4111 of the global environ then it may now point to free'd memory
4112 if the environment has been modified since. To avoid this
4113 problem we treat env==NULL as meaning 'use the default'
4117 env_is_not_environ = env != environ;
4118 if (env_is_not_environ
4119 # ifdef USE_ITHREADS
4120 && PL_curinterp == aTHX
4129 for (; *env; env++) {
4132 if (!(s = strchr(old_var,'=')) || s == old_var)
4135 #if defined(MSDOS) && !defined(DJGPP)
4137 (void)strupr(old_var);
4140 sv = newSVpv(s+1, 0);
4141 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4142 if (env_is_not_environ)
4146 #endif /* USE_ENVIRON_ARRAY */
4147 #endif /* !PERL_MICRO */
4150 #ifdef THREADS_HAVE_PIDS
4151 PL_ppid = (IV)getppid();
4154 /* touch @F array to prevent spurious warnings 20020415 MJD */
4156 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4161 S_init_perllib(pTHX)
4165 const char *perl5lib = NULL;
4168 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4174 perl5lib = PerlEnv_getenv("PERL5LIB");
4176 * It isn't possible to delete an environment variable with
4177 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4178 * case we treat PERL5LIB as undefined if it has a zero-length value.
4180 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4181 if (perl5lib && *perl5lib != '\0')
4185 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4187 s = PerlEnv_getenv("PERLLIB");
4189 incpush_use_sep(s, 0, 0);
4192 /* Treat PERL5?LIB as a possible search list logical name -- the
4193 * "natural" VMS idiom for a Unix path string. We allow each
4194 * element to be a set of |-separated directories for compatibility.
4198 if (my_trnlnm("PERL5LIB",buf,0))
4200 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4201 } while (my_trnlnm("PERL5LIB",buf,++idx));
4203 while (my_trnlnm("PERLLIB",buf,idx++))
4204 incpush_use_sep(buf, 0, 0);
4209 #ifndef PERL_IS_MINIPERL
4210 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4211 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4213 /* Use the ~-expanded versions of APPLLIB (undocumented),
4214 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4217 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4218 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4222 /* sitearch is always relative to sitelib on Windows for
4223 * DLL-based path intuition to work correctly */
4224 # if !defined(WIN32)
4225 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4226 INCPUSH_CAN_RELOCATE);
4232 /* this picks up sitearch as well */
4233 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4235 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4237 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4241 #ifdef PERL_VENDORARCH_EXP
4242 /* vendorarch is always relative to vendorlib on Windows for
4243 * DLL-based path intuition to work correctly */
4244 # if !defined(WIN32)
4245 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4246 INCPUSH_CAN_RELOCATE);
4250 #ifdef PERL_VENDORLIB_EXP
4252 /* this picks up vendorarch as well */
4253 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4255 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4257 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4258 INCPUSH_CAN_RELOCATE);
4263 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4267 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4271 s = win32_get_privlib(PERL_FS_VERSION, &len);
4273 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4276 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4278 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4282 #ifdef PERL_OTHERLIBDIRS
4283 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4284 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4285 |INCPUSH_CAN_RELOCATE);
4291 * It isn't possible to delete an environment variable with
4292 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4293 * case we treat PERL5LIB as undefined if it has a zero-length value.
4295 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4296 if (perl5lib && *perl5lib != '\0')
4300 incpush_use_sep(perl5lib, 0,
4301 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4303 /* Treat PERL5?LIB as a possible search list logical name -- the
4304 * "natural" VMS idiom for a Unix path string. We allow each
4305 * element to be a set of |-separated directories for compatibility.
4309 if (my_trnlnm("PERL5LIB",buf,0))
4311 incpush_use_sep(buf, 0,
4312 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4313 } while (my_trnlnm("PERL5LIB",buf,++idx));
4317 /* Use the ~-expanded versions of APPLLIB (undocumented),
4318 SITELIB and VENDORLIB for older versions
4321 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4322 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4325 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4326 /* Search for version-specific dirs below here */
4327 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4328 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4332 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4333 /* Search for version-specific dirs below here */
4334 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4335 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4338 #ifdef PERL_OTHERLIBDIRS
4339 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4340 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4341 |INCPUSH_CAN_RELOCATE);
4343 #endif /* !PERL_IS_MINIPERL */
4346 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4349 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4350 # define PERLLIB_SEP ';'
4353 # define PERLLIB_SEP '|'
4355 # define PERLLIB_SEP ':'
4358 #ifndef PERLLIB_MANGLE
4359 # define PERLLIB_MANGLE(s,n) (s)
4362 #ifndef PERL_IS_MINIPERL
4363 /* Push a directory onto @INC if it exists.
4364 Generate a new SV if we do this, to save needing to copy the SV we push
4367 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4372 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4374 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4375 S_ISDIR(tmpstatbuf.st_mode)) {
4377 dir = newSVsv(stem);
4379 /* Truncate dir back to stem. */
4380 SvCUR_set(dir, SvCUR(stem));
4387 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4390 #ifndef PERL_IS_MINIPERL
4391 const U8 using_sub_dirs
4392 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4393 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4394 const U8 add_versioned_sub_dirs
4395 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4396 const U8 add_archonly_sub_dirs
4397 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4398 #ifdef PERL_INC_VERSION_LIST
4399 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4402 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4403 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4404 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4405 AV *const inc = GvAVn(PL_incgv);
4407 PERL_ARGS_ASSERT_INCPUSH;
4410 /* Could remove this vestigial extra block, if we don't mind a lot of
4411 re-indenting diff noise. */
4414 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4415 arranged to unshift #! line -I onto the front of @INC. However,
4416 -I can add version and architecture specific libraries, and they
4417 need to go first. The old code assumed that it was always
4418 pushing. Hence to make it work, need to push the architecture
4419 (etc) libraries onto a temporary array, then "unshift" that onto
4420 the front of @INC. */
4421 #ifndef PERL_IS_MINIPERL
4422 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4426 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4427 defined to so something (in os2/os2.c), but the code has been
4428 this way, ignoring any possible changed of length, since
4429 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4431 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4433 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4440 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4442 while (unix[len-1] == '/') len--; /* Cosmetic */
4443 sv_usepvn(libdir,unix,len);
4446 PerlIO_printf(Perl_error_log,
4447 "Failed to unixify @INC element \"%s\"\n",
4451 /* Do the if() outside the #ifdef to avoid warnings about an unused
4454 #ifdef PERL_RELOCATABLE_INC
4456 * Relocatable include entries are marked with a leading .../
4459 * 0: Remove that leading ".../"
4460 * 1: Remove trailing executable name (anything after the last '/')
4461 * from the perl path to give a perl prefix
4463 * While the @INC element starts "../" and the prefix ends with a real
4464 * directory (ie not . or ..) chop that real directory off the prefix
4465 * and the leading "../" from the @INC element. ie a logical "../"
4467 * Finally concatenate the prefix and the remainder of the @INC element
4468 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4469 * generates /usr/local/lib/perl5
4471 const char *libpath = SvPVX(libdir);
4472 STRLEN libpath_len = SvCUR(libdir);
4473 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4475 SV * const caret_X = get_sv("\030", 0);
4476 /* Going to use the SV just as a scratch buffer holding a C
4482 /* $^X is *the* source of taint if tainting is on, hence
4483 SvPOK() won't be true. */
4485 assert(SvPOKp(caret_X));
4486 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4488 /* Firstly take off the leading .../
4489 If all else fail we'll do the paths relative to the current
4491 sv_chop(libdir, libpath + 4);
4492 /* Don't use SvPV as we're intentionally bypassing taining,
4493 mortal copies that the mg_get of tainting creates, and
4494 corruption that seems to come via the save stack.
4495 I guess that the save stack isn't correctly set up yet. */
4496 libpath = SvPVX(libdir);
4497 libpath_len = SvCUR(libdir);
4499 /* This would work more efficiently with memrchr, but as it's
4500 only a GNU extension we'd need to probe for it and
4501 implement our own. Not hard, but maybe not worth it? */
4503 prefix = SvPVX(prefix_sv);
4504 lastslash = strrchr(prefix, '/');
4506 /* First time in with the *lastslash = '\0' we just wipe off
4507 the trailing /perl from (say) /usr/foo/bin/perl
4511 while ((*lastslash = '\0'), /* Do that, come what may. */
4512 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4513 && (lastslash = strrchr(prefix, '/')))) {
4514 if (lastslash[1] == '\0'
4515 || (lastslash[1] == '.'
4516 && (lastslash[2] == '/' /* ends "/." */
4517 || (lastslash[2] == '/'
4518 && lastslash[3] == '/' /* or "/.." */
4520 /* Prefix ends "/" or "/." or "/..", any of which
4521 are fishy, so don't do any more logical cleanup.
4525 /* Remove leading "../" from path */
4528 /* Next iteration round the loop removes the last
4529 directory name from prefix by writing a '\0' in
4530 the while clause. */
4532 /* prefix has been terminated with a '\0' to the correct
4533 length. libpath points somewhere into the libdir SV.
4534 We need to join the 2 with '/' and drop the result into
4536 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4537 SvREFCNT_dec(libdir);
4538 /* And this is the new libdir. */
4541 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4542 /* Need to taint relocated paths if running set ID */
4543 SvTAINTED_on(libdir);
4546 SvREFCNT_dec(prefix_sv);
4550 #ifndef PERL_IS_MINIPERL
4552 * BEFORE pushing libdir onto @INC we may first push version- and
4553 * archname-specific sub-directories.
4555 if (using_sub_dirs) {
4557 #ifdef PERL_INC_VERSION_LIST
4558 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4559 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4560 const char * const *incver;
4562 subdir = newSVsv(libdir);
4564 if (add_versioned_sub_dirs) {
4565 /* .../version/archname if -d .../version/archname */
4566 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4567 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4569 /* .../version if -d .../version */
4570 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4571 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4574 #ifdef PERL_INC_VERSION_LIST
4576 for (incver = incverlist; *incver; incver++) {
4577 /* .../xxx if -d .../xxx */
4578 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4579 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4584 if (add_archonly_sub_dirs) {
4585 /* .../archname if -d .../archname */
4586 sv_catpvs(subdir, "/" ARCHNAME);
4587 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4591 assert (SvREFCNT(subdir) == 1);
4592 SvREFCNT_dec(subdir);
4594 #endif /* !PERL_IS_MINIPERL */
4595 /* finally add this lib directory at the end of @INC */
4597 #ifdef PERL_IS_MINIPERL
4598 const U32 extra = 0;
4600 U32 extra = av_len(av) + 1;
4602 av_unshift(inc, extra + push_basedir);
4604 av_store(inc, extra, libdir);
4605 #ifndef PERL_IS_MINIPERL
4607 /* av owns a reference, av_store() expects to be donated a
4608 reference, and av expects to be sane when it's cleared.
4609 If I wanted to be naughty and wrong, I could peek inside the
4610 implementation of av_clear(), realise that it uses
4611 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4612 and so directly steal from it (with a memcpy() to inc, and
4613 then memset() to NULL them out. But people copy code from the
4614 core expecting it to be best practise, so let's use the API.
4615 Although studious readers will note that I'm not checking any
4617 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4622 else if (push_basedir) {
4623 av_push(inc, libdir);
4626 if (!push_basedir) {
4627 assert (SvREFCNT(libdir) == 1);
4628 SvREFCNT_dec(libdir);
4634 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4638 /* This logic has been broken out from S_incpush(). It may be possible to
4641 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4643 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4644 * argument to incpush_use_sep. This allows creation of relocatable
4645 * Perl distributions that patch the binary at install time. Those
4646 * distributions will have to provide their own relocation tools; this
4647 * is not a feature otherwise supported by core Perl.
4649 #ifndef PERL_RELOCATABLE_INCPUSH
4656 /* Break at all separators */
4657 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4659 /* skip any consecutive separators */
4661 /* Uncomment the next line for PATH semantics */
4662 /* But you'll need to write tests */
4663 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4665 incpush(p, (STRLEN)(s - p), flags);
4670 incpush(p, (STRLEN)(end - p), flags);
4675 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4679 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4685 PERL_ARGS_ASSERT_CALL_LIST;
4687 while (av_len(paramList) >= 0) {
4688 cv = MUTABLE_CV(av_shift(paramList));
4690 if (paramList == PL_beginav) {
4691 /* save PL_beginav for compiler */
4692 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4694 else if (paramList == PL_checkav) {
4695 /* save PL_checkav for compiler */
4696 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4698 else if (paramList == PL_unitcheckav) {
4699 /* save PL_unitcheckav for compiler */
4700 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4711 PL_madskills |= 16384;
4716 PL_madskills &= ~16384;
4719 (void)SvPV_const(atsv, len);
4721 PL_curcop = &PL_compiling;
4722 CopLINE_set(PL_curcop, oldline);
4723 if (paramList == PL_beginav)
4724 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4726 Perl_sv_catpvf(aTHX_ atsv,
4727 "%s failed--call queue aborted",
4728 paramList == PL_checkav ? "CHECK"
4729 : paramList == PL_initav ? "INIT"
4730 : paramList == PL_unitcheckav ? "UNITCHECK"
4732 while (PL_scopestack_ix > oldscope)
4735 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4742 /* my_exit() was called */
4743 while (PL_scopestack_ix > oldscope)
4746 PL_curstash = PL_defstash;
4747 PL_curcop = &PL_compiling;
4748 CopLINE_set(PL_curcop, oldline);
4754 PL_curcop = &PL_compiling;
4755 CopLINE_set(PL_curcop, oldline);
4758 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4767 Perl_my_exit(pTHX_ U32 status)
4778 STATUS_EXIT_SET(status);
4785 Perl_my_failure_exit(pTHX)
4789 /* We have been called to fall on our sword. The desired exit code
4790 * should be already set in STATUS_UNIX, but could be shifted over
4791 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4794 * If an error code has not been set, then force the issue.
4796 if (MY_POSIX_EXIT) {
4798 /* According to the die_exit.t tests, if errno is non-zero */
4799 /* It should be used for the error status. */
4801 if (errno == EVMSERR) {
4802 STATUS_NATIVE = vaxc$errno;
4805 /* According to die_exit.t tests, if the child_exit code is */
4806 /* also zero, then we need to exit with a code of 255 */
4807 if ((errno != 0) && (errno < 256))
4808 STATUS_UNIX_EXIT_SET(errno);
4809 else if (STATUS_UNIX < 255) {
4810 STATUS_UNIX_EXIT_SET(255);
4815 /* The exit code could have been set by $? or vmsish which
4816 * means that it may not have fatal set. So convert
4817 * success/warning codes to fatal with out changing
4818 * the POSIX status code. The severity makes VMS native
4819 * status handling work, while UNIX mode programs use the
4820 * the POSIX exit codes.
4822 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4823 STATUS_NATIVE &= STS$M_COND_ID;
4824 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4828 /* Traditionally Perl on VMS always expects a Fatal Error. */
4829 if (vaxc$errno & 1) {
4831 /* So force success status to failure */
4832 if (STATUS_NATIVE & 1)
4837 STATUS_UNIX = EINTR; /* In case something cares */
4842 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4844 /* Encode the severity code */
4845 severity = STATUS_NATIVE & STS$M_SEVERITY;
4846 STATUS_UNIX = (severity ? severity : 1) << 8;
4848 /* Perl expects this to be a fatal error */
4849 if (severity != STS$K_SEVERE)
4858 STATUS_UNIX_SET(errno);
4860 exitstatus = STATUS_UNIX >> 8;
4861 if (exitstatus & 255)
4862 STATUS_UNIX_SET(exitstatus);
4864 STATUS_UNIX_SET(255);
4871 S_my_exit_jump(pTHX)
4876 SvREFCNT_dec(PL_e_script);
4880 POPSTACK_TO(PL_mainstack);
4888 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4891 const char * const p = SvPVX_const(PL_e_script);
4892 const char *nl = strchr(p, '\n');
4894 PERL_UNUSED_ARG(idx);
4895 PERL_UNUSED_ARG(maxlen);
4897 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4899 filter_del(read_e_script);
4902 sv_catpvn(buf_sv, p, nl-p);
4903 sv_chop(PL_e_script, nl);
4909 * c-indentation-style: bsd
4911 * indent-tabs-mode: t
4914 * ex: set ts=8 sts=4 sw=4 noet: