3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A ship then new they built for him
13 * of mithril and of elven-glass
14 * --from Bilbo's song of EƤrendil
16 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 /* This file contains the top-level functions that are used to create, use
20 * and destroy a perl interpreter, plus the functions used by XS code to
21 * call back into perl. Note that it does not contain the actual main()
22 * function of the interpreter; that can be found in perlmain.c
26 #define PERL_IN_PERL_C
28 #include "patchlevel.h" /* for local_patches */
34 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
39 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
41 # include <sys/wait.h>
49 char control[CMSG_SPACE(sizeof(int))];
66 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
67 char *getenv (char *); /* Usually in <stdlib.h> */
70 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
72 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
73 /* Drop everything. Heck, don't even try to call it */
74 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
76 /* Drop almost everything */
77 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
80 #define CALL_BODY_EVAL(myop) \
81 if (PL_op == (myop)) \
82 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
86 #define CALL_BODY_SUB(myop) \
87 if (PL_op == (myop)) \
88 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
92 #define CALL_LIST_BODY(cv) \
93 PUSHMARK(PL_stack_sp); \
94 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
97 S_init_tls_and_interp(PerlInterpreter *my_perl)
101 PERL_SET_INTERP(my_perl);
102 #if defined(USE_ITHREADS)
105 PERL_SET_THX(my_perl);
108 MUTEX_INIT(&PL_dollarzero_mutex);
110 #ifdef PERL_IMPLICIT_CONTEXT
111 MUTEX_INIT(&PL_my_ctx_mutex);
114 #if defined(USE_ITHREADS)
117 /* This always happens for non-ithreads */
120 PERL_SET_THX(my_perl);
125 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
128 Perl_sys_init(int* argc, char*** argv)
132 PERL_ARGS_ASSERT_SYS_INIT;
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_SYS_INIT_BODY(argc, argv);
140 Perl_sys_init3(int* argc, char*** argv, char*** env)
144 PERL_ARGS_ASSERT_SYS_INIT3;
146 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
147 PERL_UNUSED_ARG(argv);
148 PERL_UNUSED_ARG(env);
149 PERL_SYS_INIT3_BODY(argc, argv, env);
156 if (!PL_veto_cleanup) {
157 PERL_SYS_TERM_BODY();
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
172 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
174 /* Newx() needs interpreter, so call malloc() instead */
175 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
176 S_init_tls_and_interp(my_perl);
177 Zero(my_perl, 1, PerlInterpreter);
187 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
194 =head1 Embedding Functions
196 =for apidoc perl_alloc
198 Allocates a new Perl interpreter. See L<perlembed>.
206 PerlInterpreter *my_perl;
208 /* Newx() needs interpreter, so call malloc() instead */
209 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
211 S_init_tls_and_interp(my_perl);
212 #ifndef PERL_TRACK_MEMPOOL
213 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
215 Zero(my_perl, 1, PerlInterpreter);
216 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
220 #endif /* PERL_IMPLICIT_SYS */
223 =for apidoc perl_construct
225 Initializes a new Perl interpreter. See L<perlembed>.
231 perl_construct(pTHXx)
235 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
239 PL_perl_destruct_level = 1;
241 PERL_UNUSED_ARG(my_perl);
242 if (PL_perl_destruct_level > 0)
245 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. However, as &PL_sv_no doesn't contain
256 a string that is a valid numer, we have to turn the public flags by
262 SvREADONLY_on(&PL_sv_no);
263 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
265 sv_setpv(&PL_sv_yes,PL_Yes);
268 SvREADONLY_on(&PL_sv_yes);
269 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
271 SvREADONLY_on(&PL_sv_placeholder);
272 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
274 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
275 #ifdef PERL_USES_PL_PIDSTATUS
276 PL_pidstatus = newHV();
279 PL_rs = newSVpvs("\n");
289 SET_NUMERIC_STANDARD();
291 #if defined(LOCAL_PATCH_COUNT)
292 PL_localpatches = local_patches; /* For possible -v */
295 #ifdef HAVE_INTERP_INTERN
299 PerlIO_init(aTHX); /* Hook to IO system */
301 PL_fdpid = newAV(); /* for remembering popen pids by fd */
302 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
303 PL_errors = newSVpvs("");
304 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
305 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
306 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
308 /* First entry is a list of empty elements. It needs to be initialised
309 else all hell breaks loose in S_find_uninit_var(). */
310 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
311 PL_regex_pad = AvARRAY(PL_regex_padav);
313 #ifdef USE_REENTRANT_API
314 Perl_reentrant_init(aTHX);
317 /* Note that strtab is a rather special HV. Assumptions are made
318 about not iterating on it, and not adding tie magic to it.
319 It is properly deallocated in perl_destruct() */
322 HvSHAREKEYS_off(PL_strtab); /* mandatory */
323 hv_ksplit(PL_strtab, 512);
325 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
326 _dyld_lookup_and_bind
327 ("__environ", (unsigned long *) &environ_pointer, NULL);
331 # ifdef USE_ENVIRON_ARRAY
332 PL_origenviron = environ;
336 /* Use sysconf(_SC_CLK_TCK) if available, if not
337 * available or if the sysconf() fails, use the HZ.
338 * BeOS has those, but returns the wrong value.
339 * The HZ if not originally defined has been by now
340 * been defined as CLK_TCK, if available. */
341 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
342 PL_clocktick = sysconf(_SC_CLK_TCK);
343 if (PL_clocktick <= 0)
347 PL_stashcache = newHV();
349 PL_patchlevel = newSVpvs("v" PERL_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_registered_mros = newHV();
394 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
395 HvMAX(PL_registered_mros) = 0;
401 =for apidoc nothreadhook
403 Stub that provides thread hook for perl_destruct when there are
410 Perl_nothreadhook(pTHX)
416 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
418 Perl_dump_sv_child(pTHX_ SV *sv)
421 const int sock = PL_dumper_fd;
422 const int debug_fd = PerlIO_fileno(Perl_debug_log);
423 union control_un control;
426 struct cmsghdr *cmptr;
428 unsigned char buffer[256];
430 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
432 if(sock == -1 || debug_fd == -1)
435 PerlIO_flush(Perl_debug_log);
437 /* All these shenanigans are to pass a file descriptor over to our child for
438 it to dump out to. We can't let it hold open the file descriptor when it
439 forks, as the file descriptor it will dump to can turn out to be one end
440 of pipe that some other process will wait on for EOF. (So as it would
441 be open, the wait would be forever.) */
443 msg.msg_control = control.control;
444 msg.msg_controllen = sizeof(control.control);
445 /* We're a connected socket so we don't need a destination */
451 cmptr = CMSG_FIRSTHDR(&msg);
452 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
453 cmptr->cmsg_level = SOL_SOCKET;
454 cmptr->cmsg_type = SCM_RIGHTS;
455 *((int *)CMSG_DATA(cmptr)) = 1;
457 vec[0].iov_base = (void*)&sv;
458 vec[0].iov_len = sizeof(sv);
459 got = sendmsg(sock, &msg, 0);
462 perror("Debug leaking scalars parent sendmsg failed");
465 if(got < sizeof(sv)) {
466 perror("Debug leaking scalars parent short sendmsg");
470 /* Return protocol is
472 unsigned char: length of location string (0 for empty)
473 unsigned char*: string (not terminated)
475 vec[0].iov_base = (void*)&returned_errno;
476 vec[0].iov_len = sizeof(returned_errno);
477 vec[1].iov_base = buffer;
480 got = readv(sock, vec, 2);
483 perror("Debug leaking scalars parent read failed");
484 PerlIO_flush(PerlIO_stderr());
487 if(got < sizeof(returned_errno) + 1) {
488 perror("Debug leaking scalars parent short read");
489 PerlIO_flush(PerlIO_stderr());
494 got = read(sock, buffer + 1, *buffer);
496 perror("Debug leaking scalars parent read 2 failed");
497 PerlIO_flush(PerlIO_stderr());
502 perror("Debug leaking scalars parent short read 2");
503 PerlIO_flush(PerlIO_stderr());
508 if (returned_errno || *buffer) {
509 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
510 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
511 returned_errno, strerror(returned_errno));
517 =for apidoc perl_destruct
519 Shuts down a Perl interpreter. See L<perlembed>.
528 VOL signed char destruct_level; /* see possible values in intrpvar.h */
530 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
534 PERL_ARGS_ASSERT_PERL_DESTRUCT;
536 PERL_UNUSED_ARG(my_perl);
539 /* wait for all pseudo-forked children to finish */
540 PERL_WAIT_FOR_CHILDREN;
542 destruct_level = PL_perl_destruct_level;
545 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
547 const int i = atoi(s);
548 if (destruct_level < i)
554 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
560 if (PL_endav && !PL_minus_c)
561 call_list(PL_scopestack_ix, PL_endav);
567 /* Need to flush since END blocks can produce output */
570 if (CALL_FPTR(PL_threadhook)(aTHX)) {
571 /* Threads hook has vetoed further cleanup */
572 PL_veto_cleanup = TRUE;
576 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
577 if (destruct_level != 0) {
578 /* Fork here to create a child. Our child's job is to preserve the
579 state of scalars prior to destruction, so that we can instruct it
580 to dump any scalars that we later find have leaked.
581 There's no subtlety in this code - it assumes POSIX, and it doesn't
585 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
586 perror("Debug leaking scalars socketpair failed");
592 perror("Debug leaking scalars fork failed");
596 /* We are the child */
597 const int sock = fd[1];
598 const int debug_fd = PerlIO_fileno(Perl_debug_log);
601 /* Our success message is an integer 0, and a char 0 */
602 static const char success[sizeof(int) + 1] = {0};
606 /* We need to close all other file descriptors otherwise we end up
607 with interesting hangs, where the parent closes its end of a
608 pipe, and sits waiting for (another) child to terminate. Only
609 that child never terminates, because it never gets EOF, because
610 we also have the far end of the pipe open. We even need to
611 close the debugging fd, because sometimes it happens to be one
612 end of a pipe, and a process is waiting on the other end for
613 EOF. Normally it would be closed at some point earlier in
614 destruction, but if we happen to cause the pipe to remain open,
615 EOF never occurs, and we get an infinite hang. Hence all the
616 games to pass in a file descriptor if it's actually needed. */
618 f = sysconf(_SC_OPEN_MAX);
620 where = "sysconf failed";
631 union control_un control;
634 struct cmsghdr *cmptr;
638 msg.msg_control = control.control;
639 msg.msg_controllen = sizeof(control.control);
640 /* We're a connected socket so we don't need a source */
644 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
646 vec[0].iov_base = (void*)⌖
647 vec[0].iov_len = sizeof(target);
649 got = recvmsg(sock, &msg, 0);
654 where = "recv failed";
657 if(got < sizeof(target)) {
658 where = "short recv";
662 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
666 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
667 where = "wrong cmsg_len";
670 if(cmptr->cmsg_level != SOL_SOCKET) {
671 where = "wrong cmsg_level";
674 if(cmptr->cmsg_type != SCM_RIGHTS) {
675 where = "wrong cmsg_type";
679 got_fd = *(int*)CMSG_DATA(cmptr);
680 /* For our last little bit of trickery, put the file descriptor
681 back into Perl_debug_log, as if we never actually closed it
683 if(got_fd != debug_fd) {
684 if (dup2(got_fd, debug_fd) == -1) {
691 PerlIO_flush(Perl_debug_log);
693 got = write(sock, &success, sizeof(success));
696 where = "write failed";
699 if(got < sizeof(success)) {
700 where = "short write";
707 int send_errno = errno;
708 unsigned char length = (unsigned char) strlen(where);
709 struct iovec failure[3] = {
710 {(void*)&send_errno, sizeof(send_errno)},
712 {(void*)where, length}
714 int got = writev(sock, failure, 3);
715 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
716 in the parent if we try to read from the socketpair after the
717 child has exited, even if there was data to read.
718 So sleep a bit to give the parent a fighting chance of
721 _exit((got == -1) ? errno : 0);
725 PL_dumper_fd = fd[0];
730 /* We must account for everything. */
732 /* Destroy the main CV and syntax tree */
733 /* Do this now, because destroying ops can cause new SVs to be generated
734 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
735 PL_curcop to point to a valid op from which the filename structure
737 PL_curcop = &PL_compiling;
739 /* ensure comppad/curpad to refer to main's pad */
740 if (CvPADLIST(PL_main_cv)) {
741 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
743 op_free(PL_main_root);
746 PL_main_start = NULL;
747 SvREFCNT_dec(PL_main_cv);
751 /* Tell PerlIO we are about to tear things apart in case
752 we have layers which are using resources that should
756 PerlIO_destruct(aTHX);
758 if (PL_sv_objcount) {
760 * Try to destruct global references. We do this first so that the
761 * destructors and destructees still exist. Some sv's might remain.
762 * Non-referenced objects are on their own.
766 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
767 PL_defoutgv = NULL; /* may have been freed */
770 /* unhook hooks which will soon be, or use, destroyed data */
771 SvREFCNT_dec(PL_warnhook);
773 SvREFCNT_dec(PL_diehook);
776 /* call exit list functions */
777 while (PL_exitlistlen-- > 0)
778 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
780 Safefree(PL_exitlist);
785 SvREFCNT_dec(PL_registered_mros);
787 /* jettison our possibly duplicated environment */
788 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
789 * so we certainly shouldn't free it here
792 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
793 if (environ != PL_origenviron && !PL_use_safe_putenv
795 /* only main thread can free environ[0] contents */
796 && PL_curinterp == aTHX
802 for (i = 0; environ[i]; i++)
803 safesysfree(environ[i]);
805 /* Must use safesysfree() when working with environ. */
806 safesysfree(environ);
808 environ = PL_origenviron;
811 #endif /* !PERL_MICRO */
813 if (destruct_level == 0) {
815 DEBUG_P(debprofdump());
817 #if defined(PERLIO_LAYERS)
818 /* No more IO - including error messages ! */
819 PerlIO_cleanup(aTHX);
822 CopFILE_free(&PL_compiling);
823 CopSTASH_free(&PL_compiling);
825 /* The exit() function will do everything that needs doing. */
829 /* reset so print() ends up where we expect */
833 /* the syntax tree is shared between clones
834 * so op_free(PL_main_root) only ReREFCNT_dec's
835 * REGEXPs in the parent interpreter
836 * we need to manually ReREFCNT_dec for the clones
838 SvREFCNT_dec(PL_regex_padav);
839 PL_regex_padav = NULL;
843 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
844 PL_stashcache = NULL;
846 /* loosen bonds of global variables */
848 /* XXX can PL_parser still be non-null here? */
849 if(PL_parser && PL_parser->rsfp) {
850 (void)PerlIO_close(PL_parser->rsfp);
851 PL_parser->rsfp = NULL;
855 Safefree(PL_splitstr);
865 PL_doswitches = FALSE;
866 PL_dowarn = G_WARN_OFF;
867 PL_doextract = FALSE;
868 PL_sawampersand = FALSE; /* must save all match strings */
871 Safefree(PL_inplace);
873 SvREFCNT_dec(PL_patchlevel);
876 SvREFCNT_dec(PL_e_script);
882 /* magical thingies */
884 SvREFCNT_dec(PL_ofsgv); /* *, */
887 SvREFCNT_dec(PL_ors_sv); /* $\ */
890 SvREFCNT_dec(PL_rs); /* $/ */
893 Safefree(PL_osname); /* $^O */
896 SvREFCNT_dec(PL_statname);
900 /* defgv, aka *_ should be taken care of elsewhere */
902 /* clean up after study() */
903 SvREFCNT_dec(PL_lastscream);
904 PL_lastscream = NULL;
905 Safefree(PL_screamfirst);
907 Safefree(PL_screamnext);
911 Safefree(PL_efloatbuf);
915 /* startup and shutdown function lists */
916 SvREFCNT_dec(PL_beginav);
917 SvREFCNT_dec(PL_beginav_save);
918 SvREFCNT_dec(PL_endav);
919 SvREFCNT_dec(PL_checkav);
920 SvREFCNT_dec(PL_checkav_save);
921 SvREFCNT_dec(PL_unitcheckav);
922 SvREFCNT_dec(PL_unitcheckav_save);
923 SvREFCNT_dec(PL_initav);
925 PL_beginav_save = NULL;
928 PL_checkav_save = NULL;
929 PL_unitcheckav = NULL;
930 PL_unitcheckav_save = NULL;
933 /* shortcuts just get cleared */
942 PL_last_in_gv = NULL;
954 SvREFCNT_dec(PL_argvout_stack);
955 PL_argvout_stack = NULL;
957 SvREFCNT_dec(PL_modglobal);
959 SvREFCNT_dec(PL_preambleav);
960 PL_preambleav = NULL;
961 SvREFCNT_dec(PL_subname);
963 #ifdef PERL_USES_PL_PIDSTATUS
964 SvREFCNT_dec(PL_pidstatus);
967 SvREFCNT_dec(PL_toptarget);
969 SvREFCNT_dec(PL_bodytarget);
970 PL_bodytarget = NULL;
971 PL_formtarget = NULL;
973 /* free locale stuff */
974 #ifdef USE_LOCALE_COLLATE
975 Safefree(PL_collation_name);
976 PL_collation_name = NULL;
979 #ifdef USE_LOCALE_NUMERIC
980 Safefree(PL_numeric_name);
981 PL_numeric_name = NULL;
982 SvREFCNT_dec(PL_numeric_radix_sv);
983 PL_numeric_radix_sv = NULL;
986 /* clear utf8 character classes */
987 SvREFCNT_dec(PL_utf8_alnum);
988 SvREFCNT_dec(PL_utf8_alnumc);
989 SvREFCNT_dec(PL_utf8_ascii);
990 SvREFCNT_dec(PL_utf8_alpha);
991 SvREFCNT_dec(PL_utf8_space);
992 SvREFCNT_dec(PL_utf8_cntrl);
993 SvREFCNT_dec(PL_utf8_graph);
994 SvREFCNT_dec(PL_utf8_digit);
995 SvREFCNT_dec(PL_utf8_upper);
996 SvREFCNT_dec(PL_utf8_lower);
997 SvREFCNT_dec(PL_utf8_print);
998 SvREFCNT_dec(PL_utf8_punct);
999 SvREFCNT_dec(PL_utf8_xdigit);
1000 SvREFCNT_dec(PL_utf8_mark);
1001 SvREFCNT_dec(PL_utf8_toupper);
1002 SvREFCNT_dec(PL_utf8_totitle);
1003 SvREFCNT_dec(PL_utf8_tolower);
1004 SvREFCNT_dec(PL_utf8_tofold);
1005 SvREFCNT_dec(PL_utf8_idstart);
1006 SvREFCNT_dec(PL_utf8_idcont);
1007 PL_utf8_alnum = NULL;
1008 PL_utf8_alnumc = NULL;
1009 PL_utf8_ascii = NULL;
1010 PL_utf8_alpha = NULL;
1011 PL_utf8_space = NULL;
1012 PL_utf8_cntrl = NULL;
1013 PL_utf8_graph = NULL;
1014 PL_utf8_digit = NULL;
1015 PL_utf8_upper = NULL;
1016 PL_utf8_lower = NULL;
1017 PL_utf8_print = NULL;
1018 PL_utf8_punct = NULL;
1019 PL_utf8_xdigit = NULL;
1020 PL_utf8_mark = NULL;
1021 PL_utf8_toupper = NULL;
1022 PL_utf8_totitle = NULL;
1023 PL_utf8_tolower = NULL;
1024 PL_utf8_tofold = NULL;
1025 PL_utf8_idstart = NULL;
1026 PL_utf8_idcont = NULL;
1028 if (!specialWARN(PL_compiling.cop_warnings))
1029 PerlMemShared_free(PL_compiling.cop_warnings);
1030 PL_compiling.cop_warnings = NULL;
1031 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1032 PL_compiling.cop_hints_hash = NULL;
1033 CopFILE_free(&PL_compiling);
1034 CopSTASH_free(&PL_compiling);
1036 /* Prepare to destruct main symbol table. */
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 && ckWARN_d(WARN_INTERNAL)) {
1052 if (PL_scopestack_ix != 0)
1053 Perl_warner(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_warner(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_warner(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_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1065 (long)cxstack_ix + 1);
1068 /* Now absolutely destruct everything, somehow or other, loops or no. */
1070 /* the 2 is for PL_fdpid and PL_strtab */
1071 while (sv_clean_all() > 2)
1074 AvREAL_off(PL_fdpid); /* no surviving entries */
1075 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1078 #ifdef HAVE_INTERP_INTERN
1082 /* Destruct the global string table. */
1084 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1085 * so that sv_free() won't fail on them.
1086 * Now that the global string table is using a single hunk of memory
1087 * for both HE and HEK, we either need to explicitly unshare it the
1088 * correct way, or actually free things here.
1091 const I32 max = HvMAX(PL_strtab);
1092 HE * const * const array = HvARRAY(PL_strtab);
1093 HE *hent = array[0];
1096 if (hent && ckWARN_d(WARN_INTERNAL)) {
1097 HE * const next = HeNEXT(hent);
1098 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1099 "Unbalanced string table refcount: (%ld) for \"%s\"",
1100 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1107 hent = array[riter];
1112 HvARRAY(PL_strtab) = 0;
1113 HvTOTALKEYS(PL_strtab) = 0;
1114 HvFILL(PL_strtab) = 0;
1116 SvREFCNT_dec(PL_strtab);
1119 /* free the pointer tables used for cloning */
1120 ptr_table_free(PL_ptr_table);
1121 PL_ptr_table = (PTR_TBL_t*)NULL;
1124 /* free special SVs */
1126 SvREFCNT(&PL_sv_yes) = 0;
1127 sv_clear(&PL_sv_yes);
1128 SvANY(&PL_sv_yes) = NULL;
1129 SvFLAGS(&PL_sv_yes) = 0;
1131 SvREFCNT(&PL_sv_no) = 0;
1132 sv_clear(&PL_sv_no);
1133 SvANY(&PL_sv_no) = NULL;
1134 SvFLAGS(&PL_sv_no) = 0;
1138 for (i=0; i<=2; i++) {
1139 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1140 sv_clear(PERL_DEBUG_PAD(i));
1141 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1142 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1146 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1147 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1149 #ifdef DEBUG_LEAKING_SCALARS
1150 if (PL_sv_count != 0) {
1155 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1156 svend = &sva[SvREFCNT(sva)];
1157 for (sv = sva + 1; sv < svend; ++sv) {
1158 if (SvTYPE(sv) != SVTYPEMASK) {
1159 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1161 " refcnt=%"UVuf pTHX__FORMAT "\n"
1162 "\tallocated at %s:%d %s %s%s\n",
1163 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1165 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1167 sv->sv_debug_inpad ? "for" : "by",
1168 sv->sv_debug_optype ?
1169 PL_op_name[sv->sv_debug_optype]: "(none)",
1170 sv->sv_debug_cloned ? " (cloned)" : ""
1172 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1173 Perl_dump_sv_child(aTHX_ sv);
1179 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1183 /* Wait for up to 4 seconds for child to terminate.
1184 This seems to be the least effort way of timing out on reaping
1186 struct timeval waitfor = {4, 0};
1187 int sock = PL_dumper_fd;
1191 FD_SET(sock, &rset);
1192 select(sock + 1, &rset, NULL, NULL, &waitfor);
1193 waitpid(child, &status, WNOHANG);
1198 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1204 #ifdef PERL_DEBUG_READONLY_OPS
1210 #if defined(PERLIO_LAYERS)
1211 /* No more IO - including error messages ! */
1212 PerlIO_cleanup(aTHX);
1215 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1216 as currently layers use it rather than NULL as a marker
1217 for no arg - and will try and SvREFCNT_dec it.
1219 SvREFCNT(&PL_sv_undef) = 0;
1220 SvREADONLY_off(&PL_sv_undef);
1222 Safefree(PL_origfilename);
1223 PL_origfilename = NULL;
1224 Safefree(PL_reg_start_tmp);
1225 PL_reg_start_tmp = (char**)NULL;
1226 PL_reg_start_tmpl = 0;
1227 Safefree(PL_reg_curpm);
1228 Safefree(PL_reg_poscache);
1229 free_tied_hv_pool();
1230 Safefree(PL_op_mask);
1231 Safefree(PL_psig_name);
1232 PL_psig_name = (SV**)NULL;
1233 PL_psig_ptr = (SV**)NULL;
1234 Safefree(PL_psig_pend);
1235 PL_psig_pend = (int*)NULL;
1238 PL_tainting = FALSE;
1239 PL_taint_warn = FALSE;
1240 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1243 DEBUG_P(debprofdump());
1245 #ifdef USE_REENTRANT_API
1246 Perl_reentrant_free(aTHX);
1251 while (PL_regmatch_slab) {
1252 regmatch_slab *s = PL_regmatch_slab;
1253 PL_regmatch_slab = PL_regmatch_slab->next;
1257 /* As the absolutely last thing, free the non-arena SV for mess() */
1260 /* we know that type == SVt_PVMG */
1262 /* it could have accumulated taint magic */
1265 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1266 moremagic = mg->mg_moremagic;
1267 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1269 Safefree(mg->mg_ptr);
1273 /* we know that type >= SVt_PV */
1274 SvPV_free(PL_mess_sv);
1275 Safefree(SvANY(PL_mess_sv));
1276 Safefree(PL_mess_sv);
1283 =for apidoc perl_free
1285 Releases a Perl interpreter. See L<perlembed>.
1295 PERL_ARGS_ASSERT_PERL_FREE;
1297 if (PL_veto_cleanup)
1300 #ifdef PERL_TRACK_MEMPOOL
1303 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1304 * value as we're probably hunting memory leaks then
1306 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1307 if (!s || atoi(s) == 0) {
1308 const U32 old_debug = PL_debug;
1309 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1310 thread at thread exit. */
1312 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1313 "free this thread's memory\n");
1314 PL_debug &= ~ DEBUG_m_FLAG;
1316 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1317 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1318 PL_debug = old_debug;
1323 #if defined(WIN32) || defined(NETWARE)
1324 # if defined(PERL_IMPLICIT_SYS)
1327 void *host = nw_internal_host;
1329 void *host = w32_internal_host;
1331 PerlMem_free(aTHXx);
1333 nw_delete_internal_host(host);
1335 win32_delete_internal_host(host);
1339 PerlMem_free(aTHXx);
1342 PerlMem_free(aTHXx);
1346 #if defined(USE_ITHREADS)
1347 /* provide destructors to clean up the thread key when libperl is unloaded */
1348 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1350 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1351 #pragma fini "perl_fini"
1352 #elif defined(__sun) && !defined(__GNUC__)
1353 #pragma fini (perl_fini)
1357 #if defined(__GNUC__)
1358 __attribute__((destructor))
1363 if (PL_curinterp && !PL_veto_cleanup)
1368 #endif /* THREADS */
1371 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1374 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1375 PL_exitlist[PL_exitlistlen].fn = fn;
1376 PL_exitlist[PL_exitlistlen].ptr = ptr;
1380 #ifdef HAS_PROCSELFEXE
1381 /* This is a function so that we don't hold on to MAXPATHLEN
1382 bytes of stack longer than necessary
1385 S_procself_val(pTHX_ SV *sv, const char *arg0)
1387 char buf[MAXPATHLEN];
1388 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1390 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1391 includes a spurious NUL which will cause $^X to fail in system
1392 or backticks (this will prevent extensions from being built and
1393 many tests from working). readlink is not meant to add a NUL.
1394 Normal readlink works fine.
1396 if (len > 0 && buf[len-1] == '\0') {
1400 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1401 returning the text "unknown" from the readlink rather than the path
1402 to the executable (or returning an error from the readlink). Any valid
1403 path has a '/' in it somewhere, so use that to validate the result.
1404 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1406 if (len > 0 && memchr(buf, '/', len)) {
1407 sv_setpvn(sv,buf,len);
1413 #endif /* HAS_PROCSELFEXE */
1416 S_set_caret_X(pTHX) {
1418 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1420 #ifdef HAS_PROCSELFEXE
1421 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1424 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1426 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1433 =for apidoc perl_parse
1435 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1441 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1448 PERL_ARGS_ASSERT_PERL_PARSE;
1449 #ifndef MULTIPLICITY
1450 PERL_UNUSED_ARG(my_perl);
1453 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1454 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1455 * This MUST be done before any hash stores or fetches take place.
1456 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1457 * yourself, it is your responsibility to provide a good random seed!
1458 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1459 if (!PL_rehash_seed_set)
1460 PL_rehash_seed = get_hash_seed();
1462 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1464 if (s && (atoi(s) == 1))
1465 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1467 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1472 if (PL_origalen != 0) {
1473 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1476 /* Set PL_origalen be the sum of the contiguous argv[]
1477 * elements plus the size of the env in case that it is
1478 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1479 * as the maximum modifiable length of $0. In the worst case
1480 * the area we are able to modify is limited to the size of
1481 * the original argv[0]. (See below for 'contiguous', though.)
1483 const char *s = NULL;
1486 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1487 /* Do the mask check only if the args seem like aligned. */
1489 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1491 /* See if all the arguments are contiguous in memory. Note
1492 * that 'contiguous' is a loose term because some platforms
1493 * align the argv[] and the envp[]. If the arguments look
1494 * like non-aligned, assume that they are 'strictly' or
1495 * 'traditionally' contiguous. If the arguments look like
1496 * aligned, we just check that they are within aligned
1497 * PTRSIZE bytes. As long as no system has something bizarre
1498 * like the argv[] interleaved with some other data, we are
1499 * fine. (Did I just evoke Murphy's Law?) --jhi */
1500 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1502 for (i = 1; i < PL_origargc; i++) {
1503 if ((PL_origargv[i] == s + 1
1505 || PL_origargv[i] == s + 2
1510 (PL_origargv[i] > s &&
1512 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1523 #ifndef PERL_USE_SAFE_PUTENV
1524 /* Can we grab env area too to be used as the area for $0? */
1525 if (s && PL_origenviron && !PL_use_safe_putenv) {
1526 if ((PL_origenviron[0] == s + 1)
1529 (PL_origenviron[0] > s &&
1530 PL_origenviron[0] <=
1531 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1534 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1535 s = PL_origenviron[0];
1538 my_setenv("NoNe SuCh", NULL);
1539 /* Force copy of environment. */
1540 for (i = 1; PL_origenviron[i]; i++) {
1541 if (PL_origenviron[i] == s + 1
1544 (PL_origenviron[i] > s &&
1545 PL_origenviron[i] <=
1546 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1549 s = PL_origenviron[i];
1557 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1559 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1564 /* Come here if running an undumped a.out. */
1566 PL_origfilename = savepv(argv[0]);
1567 PL_do_undump = FALSE;
1568 cxstack_ix = -1; /* start label stack again */
1570 assert (!PL_tainted);
1572 S_set_caret_X(aTHX);
1574 init_postdump_symbols(argc,argv,env);
1579 op_free(PL_main_root);
1580 PL_main_root = NULL;
1582 PL_main_start = NULL;
1583 SvREFCNT_dec(PL_main_cv);
1587 oldscope = PL_scopestack_ix;
1588 PL_dowarn = G_WARN_OFF;
1593 parse_body(env,xsinit);
1595 call_list(oldscope, PL_unitcheckav);
1597 call_list(oldscope, PL_checkav);
1604 /* my_exit() was called */
1605 while (PL_scopestack_ix > oldscope)
1608 PL_curstash = PL_defstash;
1610 call_list(oldscope, PL_unitcheckav);
1612 call_list(oldscope, PL_checkav);
1616 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1624 #define INCPUSH_UNSHIFT 0x01
1625 #define INCPUSH_ADD_OLD_VERS 0x02
1626 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1627 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1628 #define INCPUSH_NOT_BASEDIR 0x10
1629 #define INCPUSH_CAN_RELOCATE 0x20
1630 #define INCPUSH_ADD_SUB_DIRS \
1631 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1634 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1638 int argc = PL_origargc;
1639 char **argv = PL_origargv;
1640 const char *scriptname = NULL;
1641 VOL bool dosearch = FALSE;
1643 const char *cddir = NULL;
1644 #ifdef USE_SITECUSTOMIZE
1645 bool minus_f = FALSE;
1647 SV *linestr_sv = newSV_type(SVt_PVIV);
1648 bool add_read_e_script = FALSE;
1650 SvGROW(linestr_sv, 80);
1651 sv_setpvs(linestr_sv,"");
1657 for (argc--,argv++; argc > 0; argc--,argv++) {
1658 if (argv[0][0] != '-' || !argv[0][1])
1664 #ifndef PERL_STRICT_CR
1688 if ((s = moreswitches(s)))
1693 CHECK_MALLOC_TOO_LATE_FOR('t');
1694 if( !PL_tainting ) {
1695 PL_taint_warn = TRUE;
1701 CHECK_MALLOC_TOO_LATE_FOR('T');
1703 PL_taint_warn = FALSE;
1711 forbid_setid('e', FALSE);
1713 PL_e_script = newSVpvs("");
1714 add_read_e_script = TRUE;
1717 sv_catpv(PL_e_script, s);
1719 sv_catpv(PL_e_script, argv[1]);
1723 Perl_croak(aTHX_ "No code specified for -%c", c);
1724 sv_catpvs(PL_e_script, "\n");
1728 #ifdef USE_SITECUSTOMIZE
1734 case 'I': /* -I handled both here and in moreswitches() */
1735 forbid_setid('I', FALSE);
1736 if (!*++s && (s=argv[1]) != NULL) {
1740 STRLEN len = strlen(s);
1741 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1744 Perl_croak(aTHX_ "No directory specified for -I");
1747 forbid_setid('S', FALSE);
1755 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1757 /* Can't do newSVpvs() as that would involve pre-processor
1758 condititionals inside a macro expansion. */
1759 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1766 # ifdef PERL_DONT_CREATE_GVSV
1767 " PERL_DONT_CREATE_GVSV"
1769 # ifdef PERL_MALLOC_WRAP
1772 # ifdef PERL_MEM_LOG
1775 # ifdef PERL_MEM_LOG_NOIMPL
1776 " PERL_MEM_LOG_NOIMPL"
1778 # ifdef PERL_USE_DEVEL
1781 # ifdef PERL_USE_SAFE_PUTENV
1782 " PERL_USE_SAFE_PUTENV"
1784 # ifdef USE_SITECUSTOMIZE
1785 " USE_SITECUSTOMIZE"
1787 # ifdef USE_FAST_STDIO
1792 sv_catpv(opts_prog, PL_bincompat_options);
1793 /* Terminate the qw(, and then wrap at 76 columns. */
1794 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1796 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1798 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1800 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1802 #if defined(LOCAL_PATCH_COUNT)
1803 if (LOCAL_PATCH_COUNT > 0) {
1805 sv_catpvs(opts_prog,
1806 "\" Locally applied patches:\\n\",");
1807 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1808 if (PL_localpatches[i])
1809 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1810 0, PL_localpatches[i], 0);
1814 Perl_sv_catpvf(aTHX_ opts_prog,
1815 "\" Built under %s\\n",OSNAME);
1818 sv_catpvs(opts_prog,
1819 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1821 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1824 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1825 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1826 "sort grep {/^PERL/} keys %ENV; ");
1828 sv_catpvs(opts_prog,
1829 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1831 sv_catpvs(opts_prog,
1832 "print \" \\%ENV:\\n @env\\n\" if @env;"
1833 "print \" \\@INC:\\n @INC\\n\";");
1837 opts_prog = Perl_newSVpvf(aTHX_
1838 "Config::config_vars(qw%c%s%c)",
1842 av_push(PL_preambleav, opts_prog);
1843 /* don't look for script or read stdin */
1844 scriptname = BIT_BUCKET;
1848 PL_doextract = TRUE;
1856 if (!*++s || isSPACE(*s)) {
1860 /* catch use of gnu style long options */
1861 if (strEQ(s, "version")) {
1865 if (strEQ(s, "help")) {
1872 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1883 #ifndef SECURE_INTERNAL_GETENV
1886 (s = PerlEnv_getenv("PERL5OPT")))
1890 if (*s == '-' && *(s+1) == 'T') {
1891 CHECK_MALLOC_TOO_LATE_FOR('T');
1893 PL_taint_warn = FALSE;
1896 char *popt_copy = NULL;
1909 if (!strchr("CDIMUdmtwW", *s))
1910 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1914 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1915 s = popt_copy + (s - d);
1923 if( !PL_tainting ) {
1924 PL_taint_warn = TRUE;
1935 #ifdef USE_SITECUSTOMIZE
1937 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1938 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1943 scriptname = argv[0];
1946 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1948 else if (scriptname == NULL) {
1950 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1956 /* Set $^X early so that it can be used for relocatable paths in @INC */
1957 assert (!PL_tainted);
1959 S_set_caret_X(aTHX);
1964 bool suidscript = FALSE;
1966 open_script(scriptname, dosearch, &suidscript, &rsfp);
1968 validate_suid(validarg, scriptname, fdscript, suidscript,
1972 # if defined(SIGCHLD) || defined(SIGCLD)
1975 # define SIGCHLD SIGCLD
1977 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1978 if (sigstate == (Sighandler_t) SIG_IGN) {
1979 if (ckWARN(WARN_SIGNAL))
1980 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1981 "Can't ignore signal CHLD, forcing to default");
1982 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1990 /* This will croak if suidscript is true, as -x cannot be used with
1992 forbid_setid('x', suidscript);
1993 /* Hence you can't get here if suidscript is true */
1995 find_beginning(linestr_sv, rsfp);
1996 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
1997 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2001 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2002 CvUNIQUE_on(PL_compcv);
2004 CvPADLIST(PL_compcv) = pad_new(0);
2006 PL_isarev = newHV();
2009 boot_core_UNIVERSAL();
2013 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2015 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2021 # ifdef HAS_SOCKS5_INIT
2022 socks5_init(argv[0]);
2028 init_predump_symbols();
2029 /* init_postdump_symbols not currently designed to be called */
2030 /* more than once (ENV isn't cleared first, for example) */
2031 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2033 init_postdump_symbols(argc,argv,env);
2035 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2036 * or explicitly in some platforms.
2037 * locale.c:Perl_init_i18nl10n() if the environment
2038 * look like the user wants to use UTF-8. */
2039 #if defined(__SYMBIAN32__)
2040 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2043 /* Requires init_predump_symbols(). */
2044 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2049 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2050 * and the default open disciplines. */
2051 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2052 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2054 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2055 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2056 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2058 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2059 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2060 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2062 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2063 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2064 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2066 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2067 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2070 sv_setpvs(sv, ":utf8\0:utf8");
2072 sv_setpvs(sv, ":utf8\0");
2075 sv_setpvs(sv, "\0:utf8");
2083 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2084 if (strEQ(s, "unsafe"))
2085 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2086 else if (strEQ(s, "safe"))
2087 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2089 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2096 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2100 PL_xmlfp = PerlIO_stdout();
2102 PL_xmlfp = PerlIO_open(s, "w");
2104 Perl_croak(aTHX_ "Can't open %s", s);
2106 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2112 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2113 PL_madskills = atoi(s);
2114 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2119 lex_start(linestr_sv, rsfp, TRUE);
2120 PL_subname = newSVpvs("main");
2122 if (add_read_e_script)
2123 filter_add(read_e_script, NULL);
2125 /* now parse the script */
2127 SETERRNO(0,SS_NORMAL);
2128 if (yyparse() || PL_parser->error_count) {
2130 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2132 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2136 CopLINE_set(PL_curcop, 0);
2137 PL_curstash = PL_defstash;
2139 SvREFCNT_dec(PL_e_script);
2147 SAVECOPFILE(PL_curcop);
2148 SAVECOPLINE(PL_curcop);
2149 gv_check(PL_defstash);
2158 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2159 dump_mstats("after compilation:");
2169 =for apidoc perl_run
2171 Tells a Perl interpreter to run. See L<perlembed>.
2184 PERL_ARGS_ASSERT_PERL_RUN;
2185 #ifndef MULTIPLICITY
2186 PERL_UNUSED_ARG(my_perl);
2189 oldscope = PL_scopestack_ix;
2197 cxstack_ix = -1; /* start context stack again */
2199 case 0: /* normal completion */
2203 case 2: /* my_exit() */
2204 while (PL_scopestack_ix > oldscope)
2207 PL_curstash = PL_defstash;
2208 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2209 PL_endav && !PL_minus_c)
2210 call_list(oldscope, PL_endav);
2212 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2213 dump_mstats("after execution: ");
2219 POPSTACK_TO(PL_mainstack);
2222 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2233 S_run_body(pTHX_ I32 oldscope)
2236 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2237 PL_sawampersand ? "Enabling" : "Omitting"));
2239 if (!PL_restartop) {
2243 exit(0); /* less likely to core dump than my_exit(0) */
2246 DEBUG_x(dump_all());
2249 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2253 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2256 if (PERLDB_SINGLE && PL_DBsingle)
2257 sv_setiv(PL_DBsingle, 1);
2259 call_list(oldscope, PL_initav);
2260 #ifdef PERL_DEBUG_READONLY_OPS
2261 Perl_pending_Slabs_to_ro(aTHX);
2268 PL_op = PL_restartop;
2272 else if (PL_main_start) {
2273 CvDEPTH(PL_main_cv) = 1;
2274 PL_op = PL_main_start;
2282 =head1 SV Manipulation Functions
2284 =for apidoc p||get_sv
2286 Returns the SV of the specified Perl scalar. C<flags> are passed to
2287 C<gv_fetchpv>. If C<GV_ADD> is set and the
2288 Perl variable does not exist then it will be created. If C<flags> is zero
2289 and the variable does not exist then NULL is returned.
2295 Perl_get_sv(pTHX_ const char *name, I32 flags)
2299 PERL_ARGS_ASSERT_GET_SV;
2301 gv = gv_fetchpv(name, flags, SVt_PV);
2308 =head1 Array Manipulation Functions
2310 =for apidoc p||get_av
2312 Returns the AV of the specified Perl array. C<flags> are passed to
2313 C<gv_fetchpv>. If C<GV_ADD> is set and the
2314 Perl variable does not exist then it will be created. If C<flags> is zero
2315 and the variable does not exist then NULL is returned.
2321 Perl_get_av(pTHX_ const char *name, I32 flags)
2323 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2325 PERL_ARGS_ASSERT_GET_AV;
2335 =head1 Hash Manipulation Functions
2337 =for apidoc p||get_hv
2339 Returns the HV of the specified Perl hash. C<flags> are passed to
2340 C<gv_fetchpv>. If C<GV_ADD> is set and the
2341 Perl variable does not exist then it will be created. If C<flags> is zero
2342 and the variable does not exist then NULL is returned.
2348 Perl_get_hv(pTHX_ const char *name, I32 flags)
2350 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2352 PERL_ARGS_ASSERT_GET_HV;
2362 =head1 CV Manipulation Functions
2364 =for apidoc p||get_cvn_flags
2366 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2367 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2368 exist then it will be declared (which has the same effect as saying
2369 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2370 then NULL is returned.
2372 =for apidoc p||get_cv
2374 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2380 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2382 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2383 /* XXX this is probably not what they think they're getting.
2384 * It has the same effect as "sub name;", i.e. just a forward
2387 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2389 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2390 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2391 return newSUB(start_subparse(FALSE, 0),
2392 newSVOP(OP_CONST, 0, sv),
2400 /* Nothing in core calls this now, but we can't replace it with a macro and
2401 move it to mathoms.c as a macro would evaluate name twice. */
2403 Perl_get_cv(pTHX_ const char *name, I32 flags)
2405 PERL_ARGS_ASSERT_GET_CV;
2407 return get_cvn_flags(name, strlen(name), flags);
2410 /* Be sure to refetch the stack pointer after calling these routines. */
2414 =head1 Callback Functions
2416 =for apidoc p||call_argv
2418 Performs a callback to the specified Perl sub. See L<perlcall>.
2424 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2426 /* See G_* flags in cop.h */
2427 /* null terminated arg list */
2432 PERL_ARGS_ASSERT_CALL_ARGV;
2437 mXPUSHs(newSVpv(*argv,0));
2442 return call_pv(sub_name, flags);
2446 =for apidoc p||call_pv
2448 Performs a callback to the specified Perl sub. See L<perlcall>.
2454 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2455 /* name of the subroutine */
2456 /* See G_* flags in cop.h */
2458 PERL_ARGS_ASSERT_CALL_PV;
2460 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2464 =for apidoc p||call_method
2466 Performs a callback to the specified Perl method. The blessed object must
2467 be on the stack. See L<perlcall>.
2473 Perl_call_method(pTHX_ const char *methname, I32 flags)
2474 /* name of the subroutine */
2475 /* See G_* flags in cop.h */
2477 PERL_ARGS_ASSERT_CALL_METHOD;
2479 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2482 /* May be called with any of a CV, a GV, or an SV containing the name. */
2484 =for apidoc p||call_sv
2486 Performs a callback to the Perl sub whose name is in the SV. See
2493 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2494 /* See G_* flags in cop.h */
2497 LOGOP myop; /* fake syntax tree node */
2502 bool oldcatch = CATCH_GET;
2504 OP* const oldop = PL_op;
2507 PERL_ARGS_ASSERT_CALL_SV;
2509 if (flags & G_DISCARD) {
2513 if (!(flags & G_WANT)) {
2514 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2519 Zero(&myop, 1, LOGOP);
2520 myop.op_next = NULL;
2521 if (!(flags & G_NOARGS))
2522 myop.op_flags |= OPf_STACKED;
2523 myop.op_flags |= OP_GIMME_REVERSE(flags);
2527 EXTEND(PL_stack_sp, 1);
2528 *++PL_stack_sp = sv;
2530 oldscope = PL_scopestack_ix;
2532 if (PERLDB_SUB && PL_curstash != PL_debstash
2533 /* Handle first BEGIN of -d. */
2534 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2535 /* Try harder, since this may have been a sighandler, thus
2536 * curstash may be meaningless. */
2537 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2538 && !(flags & G_NODEBUG))
2539 PL_op->op_private |= OPpENTERSUB_DB;
2541 if (flags & G_METHOD) {
2542 Zero(&method_op, 1, UNOP);
2543 method_op.op_next = PL_op;
2544 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2545 method_op.op_type = OP_METHOD;
2546 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2547 myop.op_type = OP_ENTERSUB;
2548 PL_op = (OP*)&method_op;
2551 if (!(flags & G_EVAL)) {
2553 CALL_BODY_SUB((OP*)&myop);
2554 retval = PL_stack_sp - (PL_stack_base + oldmark);
2555 CATCH_SET(oldcatch);
2558 myop.op_other = (OP*)&myop;
2560 create_eval_scope(flags|G_FAKINGEVAL);
2568 CALL_BODY_SUB((OP*)&myop);
2569 retval = PL_stack_sp - (PL_stack_base + oldmark);
2570 if (!(flags & G_KEEPERR)) {
2578 /* my_exit() was called */
2579 PL_curstash = PL_defstash;
2582 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2583 Perl_croak(aTHX_ "Callback called exit");
2588 PL_op = PL_restartop;
2592 PL_stack_sp = PL_stack_base + oldmark;
2593 if ((flags & G_WANT) == G_ARRAY)
2597 *++PL_stack_sp = &PL_sv_undef;
2602 if (PL_scopestack_ix > oldscope)
2603 delete_eval_scope();
2607 if (flags & G_DISCARD) {
2608 PL_stack_sp = PL_stack_base + oldmark;
2617 /* Eval a string. The G_EVAL flag is always assumed. */
2620 =for apidoc p||eval_sv
2622 Tells Perl to C<eval> the string in the SV.
2628 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2630 /* See G_* flags in cop.h */
2634 UNOP myop; /* fake syntax tree node */
2635 VOL I32 oldmark = SP - PL_stack_base;
2638 OP* const oldop = PL_op;
2641 PERL_ARGS_ASSERT_EVAL_SV;
2643 if (flags & G_DISCARD) {
2650 Zero(PL_op, 1, UNOP);
2651 EXTEND(PL_stack_sp, 1);
2652 *++PL_stack_sp = sv;
2654 if (!(flags & G_NOARGS))
2655 myop.op_flags = OPf_STACKED;
2656 myop.op_next = NULL;
2657 myop.op_type = OP_ENTEREVAL;
2658 myop.op_flags |= OP_GIMME_REVERSE(flags);
2659 if (flags & G_KEEPERR)
2660 myop.op_flags |= OPf_SPECIAL;
2662 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2663 * before a PUSHEVAL, which corrupts the stack after a croak */
2664 TAINT_PROPER("eval_sv()");
2670 CALL_BODY_EVAL((OP*)&myop);
2671 retval = PL_stack_sp - (PL_stack_base + oldmark);
2672 if (!(flags & G_KEEPERR)) {
2680 /* my_exit() was called */
2681 PL_curstash = PL_defstash;
2684 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2685 Perl_croak(aTHX_ "Callback called exit");
2690 PL_op = PL_restartop;
2694 PL_stack_sp = PL_stack_base + oldmark;
2695 if ((flags & G_WANT) == G_ARRAY)
2699 *++PL_stack_sp = &PL_sv_undef;
2705 if (flags & G_DISCARD) {
2706 PL_stack_sp = PL_stack_base + oldmark;
2716 =for apidoc p||eval_pv
2718 Tells Perl to C<eval> the given string and return an SV* result.
2724 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2728 SV* sv = newSVpv(p, 0);
2730 PERL_ARGS_ASSERT_EVAL_PV;
2732 eval_sv(sv, G_SCALAR);
2739 if (croak_on_error && SvTRUE(ERRSV)) {
2740 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2746 /* Require a module. */
2749 =head1 Embedding Functions
2751 =for apidoc p||require_pv
2753 Tells Perl to C<require> the file named by the string argument. It is
2754 analogous to the Perl code C<eval "require '$file'">. It's even
2755 implemented that way; consider using load_module instead.
2760 Perl_require_pv(pTHX_ const char *pv)
2766 PERL_ARGS_ASSERT_REQUIRE_PV;
2768 PUSHSTACKi(PERLSI_REQUIRE);
2770 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2771 eval_sv(sv_2mortal(sv), G_DISCARD);
2777 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2779 /* This message really ought to be max 23 lines.
2780 * Removed -h because the user already knows that option. Others? */
2782 static const char * const usage_msg[] = {
2783 "-0[octal] specify record separator (\\0, if no argument)",
2784 "-a autosplit mode with -n or -p (splits $_ into @F)",
2785 "-C[number/list] enables the listed Unicode features",
2786 "-c check syntax only (runs BEGIN and CHECK blocks)",
2787 "-d[:debugger] run program under debugger",
2788 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2789 "-e program one line of program (several -e's allowed, omit programfile)",
2790 "-E program like -e, but enables all optional features",
2791 "-f don't do $sitelib/sitecustomize.pl at startup",
2792 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2793 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2794 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2795 "-l[octal] enable line ending processing, specifies line terminator",
2796 "-[mM][-]module execute \"use/no module...\" before executing program",
2797 "-n assume \"while (<>) { ... }\" loop around program",
2798 "-p assume loop like -n but print line also, like sed",
2799 "-s enable rudimentary parsing for switches after programfile",
2800 "-S look for programfile using PATH environment variable",
2801 "-t enable tainting warnings",
2802 "-T enable tainting checks",
2803 "-u dump core after parsing program",
2804 "-U allow unsafe operations",
2805 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2806 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2807 "-w enable many useful warnings (RECOMMENDED)",
2808 "-W enable all warnings",
2809 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2810 "-X disable all warnings",
2814 const char * const *p = usage_msg;
2816 PERL_ARGS_ASSERT_USAGE;
2818 PerlIO_printf(PerlIO_stdout(),
2819 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2822 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2825 /* convert a string of -D options (or digits) into an int.
2826 * sets *s to point to the char after the options */
2830 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2832 static const char * const usage_msgd[] = {
2833 " Debugging flag values: (see also -d)",
2834 " p Tokenizing and parsing (with v, displays parse stack)",
2835 " s Stack snapshots (with v, displays all stacks)",
2836 " l Context (loop) stack processing",
2837 " t Trace execution",
2838 " o Method and overloading resolution",
2839 " c String/numeric conversions",
2840 " P Print profiling info, source file input state",
2841 " m Memory and SV allocation",
2842 " f Format processing",
2843 " r Regular expression parsing and execution",
2844 " x Syntax tree dump",
2845 " u Tainting checks",
2846 " H Hash dump -- usurps values()",
2847 " X Scratchpad allocation",
2850 " R Include reference counts of dumped variables (eg when using -Ds)",
2851 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2852 " v Verbose: use in conjunction with other flags",
2854 " A Consistency checks on internal structures",
2855 " q quiet - currently only suppresses the 'EXECUTING' message",
2860 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2863 /* if adding extra options, remember to update DEBUG_MASK */
2864 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2866 for (; isALNUM(**s); (*s)++) {
2867 const char * const d = strchr(debopts,**s);
2869 i |= 1 << (d - debopts);
2870 else if (ckWARN_d(WARN_DEBUGGING))
2871 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2872 "invalid option -D%c, use -D'' to see choices\n", **s);
2875 else if (isDIGIT(**s)) {
2877 for (; isALNUM(**s); (*s)++) ;
2879 else if (givehelp) {
2880 const char *const *p = usage_msgd;
2881 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2884 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2885 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2886 "-Dp not implemented on this platform\n");
2892 /* This routine handles any switches that can be given during run */
2895 Perl_moreswitches(pTHX_ const char *s)
2899 const char option = *s; /* used to remember option in -m/-M code */
2901 PERL_ARGS_ASSERT_MORESWITCHES;
2909 SvREFCNT_dec(PL_rs);
2910 if (s[1] == 'x' && s[2]) {
2911 const char *e = s+=2;
2917 flags = PERL_SCAN_SILENT_ILLDIGIT;
2918 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2919 if (s + numlen < e) {
2920 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2924 PL_rs = newSVpvs("");
2925 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2926 tmps = (U8*)SvPVX(PL_rs);
2927 uvchr_to_utf8(tmps, rschar);
2928 SvCUR_set(PL_rs, UNISKIP(rschar));
2933 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2934 if (rschar & ~((U8)~0))
2935 PL_rs = &PL_sv_undef;
2936 else if (!rschar && numlen >= 2)
2937 PL_rs = newSVpvs("");
2939 char ch = (char)rschar;
2940 PL_rs = newSVpvn(&ch, 1);
2943 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2948 PL_unicode = parse_unicode_opts( (const char **)&s );
2949 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2955 while (*s && !isSPACE(*s)) ++s;
2956 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2967 forbid_setid('d', FALSE);
2970 /* -dt indicates to the debugger that threads will be used */
2971 if (*s == 't' && !isALNUM(s[1])) {
2973 my_setenv("PERL5DB_THREADED", "1");
2976 /* The following permits -d:Mod to accepts arguments following an =
2977 in the fashion that -MSome::Mod does. */
2978 if (*s == ':' || *s == '=') {
2979 const char *start = ++s;
2980 const char *const end = s + strlen(s);
2981 SV * const sv = newSVpvs("use Devel::");
2983 /* We now allow -d:Module=Foo,Bar */
2984 while(isALNUM(*s) || *s==':') ++s;
2986 sv_catpvn(sv, start, end - start);
2988 sv_catpvn(sv, start, s-start);
2989 /* Don't use NUL as q// delimiter here, this string goes in the
2991 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
2994 my_setenv("PERL5DB", SvPV_nolen_const(sv));
2998 PL_perldb = PERLDB_ALL;
3005 forbid_setid('D', FALSE);
3007 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3008 #else /* !DEBUGGING */
3009 if (ckWARN_d(WARN_DEBUGGING))
3010 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3011 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3012 for (s++; isALNUM(*s); s++) ;
3017 usage(PL_origargv[0]);
3020 Safefree(PL_inplace);
3021 #if defined(__CYGWIN__) /* do backup extension automagically */
3022 if (*(s+1) == '\0') {
3023 PL_inplace = savepvs(".bak");
3026 #endif /* __CYGWIN__ */
3028 const char * const start = ++s;
3029 while (*s && !isSPACE(*s))
3032 PL_inplace = savepvn(start, s - start);
3036 if (*s == '-') /* Additional switches on #! line. */
3040 case 'I': /* -I handled both here and in parse_body() */
3041 forbid_setid('I', FALSE);
3043 while (*s && isSPACE(*s))
3048 /* ignore trailing spaces (possibly followed by other switches) */
3050 for (e = p; *e && !isSPACE(*e); e++) ;
3054 } while (*p && *p != '-');
3056 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3062 Perl_croak(aTHX_ "No directory specified for -I");
3068 SvREFCNT_dec(PL_ors_sv);
3074 PL_ors_sv = newSVpvs("\n");
3075 numlen = 3 + (*s == '0');
3076 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3080 if (RsPARA(PL_rs)) {
3081 PL_ors_sv = newSVpvs("\n\n");
3084 PL_ors_sv = newSVsv(PL_rs);
3089 forbid_setid('M', FALSE); /* XXX ? */
3092 forbid_setid('m', FALSE); /* XXX ? */
3097 const char *use = "use ";
3099 /* -M-foo == 'no foo' */
3100 /* Leading space on " no " is deliberate, to make both
3101 possibilities the same length. */
3102 if (*s == '-') { use = " no "; ++s; }
3103 sv = newSVpvn(use,4);
3105 /* We allow -M'Module qw(Foo Bar)' */
3106 while(isALNUM(*s) || *s==':') {
3115 Perl_croak(aTHX_ "Module name required with -%c option",
3118 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3119 "contains single ':'",
3120 (int)(s - start), start, option);
3121 end = s + strlen(s);
3123 sv_catpvn(sv, start, end - start);
3124 if (option == 'm') {
3126 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3127 sv_catpvs( sv, " ()");
3130 sv_catpvn(sv, start, s-start);
3131 /* Use NUL as q''-delimiter. */
3132 sv_catpvs(sv, " split(/,/,q\0");
3134 sv_catpvn(sv, s, end - s);
3135 sv_catpvs(sv, "\0)");
3138 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3141 Perl_croak(aTHX_ "Missing argument to -%c", option);
3152 forbid_setid('s', FALSE);
3153 PL_doswitches = TRUE;
3167 PL_do_undump = TRUE;
3175 if (!sv_derived_from(PL_patchlevel, "version"))
3176 upg_version(PL_patchlevel, TRUE);
3179 SV* level= vstringify(PL_patchlevel);
3180 #ifdef PERL_PATCHNUM
3181 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3182 SV *num = newSVpvs(PERL_PATCHNUM "*");
3184 SV *num = newSVpvs(PERL_PATCHNUM);
3187 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3188 SvREFCNT_dec(level);
3191 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3195 PerlIO_printf(PerlIO_stdout(),
3196 "\nThis is perl, %"SVf
3200 SvREFCNT_dec(level);
3203 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3204 PerlIO_printf(PerlIO_stdout(),
3205 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3206 SVfARG(vstringify(PL_patchlevel))));
3207 PerlIO_printf(PerlIO_stdout(),
3208 Perl_form(aTHX_ " built under %s at %s %s\n",
3209 OSNAME, __DATE__, __TIME__));
3210 PerlIO_printf(PerlIO_stdout(),
3211 Perl_form(aTHX_ " OS Specific Release: %s\n",
3214 #if defined(LOCAL_PATCH_COUNT)
3215 if (LOCAL_PATCH_COUNT > 0)
3216 PerlIO_printf(PerlIO_stdout(),
3217 "\n(with %d registered patch%s, "
3218 "see perl -V for more detail)",
3220 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3223 PerlIO_printf(PerlIO_stdout(),
3224 "\n\nCopyright 1987-2009, Larry Wall\n");
3226 PerlIO_printf(PerlIO_stdout(),
3227 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3230 PerlIO_printf(PerlIO_stdout(),
3231 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3232 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3235 PerlIO_printf(PerlIO_stdout(),
3236 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3237 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3240 PerlIO_printf(PerlIO_stdout(),
3241 "atariST series port, ++jrb bammi@cadence.com\n");
3244 PerlIO_printf(PerlIO_stdout(),
3245 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3248 PerlIO_printf(PerlIO_stdout(),
3249 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3252 PerlIO_printf(PerlIO_stdout(),
3253 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3256 PerlIO_printf(PerlIO_stdout(),
3257 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "MiNT port by Guido Flohr, 1997-1999\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "EPOC port by Olaf Flebbe, 1999-2002\n");
3276 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3277 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3280 #ifdef __SYMBIAN32__
3281 PerlIO_printf(PerlIO_stdout(),
3282 "Symbian port by Nokia, 2004-2005\n");
3284 #ifdef BINARY_BUILD_NOTICE
3285 BINARY_BUILD_NOTICE;
3287 PerlIO_printf(PerlIO_stdout(),
3289 Perl may be copied only under the terms of either the Artistic License or the\n\
3290 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3291 Complete documentation for Perl, including FAQ lists, should be found on\n\
3292 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3293 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3296 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3297 PL_dowarn |= G_WARN_ON;
3302 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3303 if (!specialWARN(PL_compiling.cop_warnings))
3304 PerlMemShared_free(PL_compiling.cop_warnings);
3305 PL_compiling.cop_warnings = pWARN_ALL ;
3309 PL_dowarn = G_WARN_ALL_OFF;
3310 if (!specialWARN(PL_compiling.cop_warnings))
3311 PerlMemShared_free(PL_compiling.cop_warnings);
3312 PL_compiling.cop_warnings = pWARN_NONE ;
3319 if (s[0] == '-') /* Additional switches on #! line. */
3324 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3330 #ifdef ALTERNATE_SHEBANG
3331 case 'S': /* OS/2 needs -S on "extproc" line. */
3335 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3340 /* compliments of Tom Christiansen */
3342 /* unexec() can be found in the Gnu emacs distribution */
3343 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3346 Perl_my_unexec(pTHX)
3348 PERL_UNUSED_CONTEXT;
3350 SV * prog = newSVpv(BIN_EXP, 0);
3351 SV * file = newSVpv(PL_origfilename, 0);
3355 sv_catpvs(prog, "/perl");
3356 sv_catpvs(file, ".perldump");
3358 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3359 /* unexec prints msg to stderr in case of failure */
3360 PerlProc_exit(status);
3363 # include <lib$routines.h>
3364 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3365 # elif defined(WIN32) || defined(__CYGWIN__)
3366 Perl_croak(aTHX_ "dump is not supported");
3368 ABORT(); /* for use with undump */
3373 /* initialize curinterp */
3379 # define PERLVAR(var,type)
3380 # define PERLVARA(var,n,type)
3381 # if defined(PERL_IMPLICIT_CONTEXT)
3382 # define PERLVARI(var,type,init) aTHX->var = init;
3383 # define PERLVARIC(var,type,init) aTHX->var = init;
3385 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3386 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3388 # include "intrpvar.h"
3394 # define PERLVAR(var,type)
3395 # define PERLVARA(var,n,type)
3396 # define PERLVARI(var,type,init) PL_##var = init;
3397 # define PERLVARIC(var,type,init) PL_##var = init;
3398 # include "intrpvar.h"
3405 /* As these are inside a structure, PERLVARI isn't capable of initialising
3407 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3408 PL_reg_poscache = PL_reg_starttry = NULL;
3412 S_init_main_stash(pTHX)
3417 PL_curstash = PL_defstash = newHV();
3418 /* We know that the string "main" will be in the global shared string
3419 table, so it's a small saving to use it rather than allocate another
3421 PL_curstname = newSVpvs_share("main");
3422 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3423 /* If we hadn't caused another reference to "main" to be in the shared
3424 string table above, then it would be worth reordering these two,
3425 because otherwise all we do is delete "main" from it as a consequence
3426 of the SvREFCNT_dec, only to add it again with hv_name_set */
3427 SvREFCNT_dec(GvHV(gv));
3428 hv_name_set(PL_defstash, "main", 4, 0);
3429 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3431 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3433 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3434 GvMULTI_on(PL_incgv);
3435 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3436 GvMULTI_on(PL_hintgv);
3437 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3438 SvREFCNT_inc_simple_void(PL_defgv);
3439 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3440 SvREFCNT_inc_simple_void(PL_errgv);
3441 GvMULTI_on(PL_errgv);
3442 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3443 GvMULTI_on(PL_replgv);
3444 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3445 #ifdef PERL_DONT_CREATE_GVSV
3448 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3450 PL_curstash = PL_defstash;
3451 CopSTASH_set(&PL_compiling, PL_defstash);
3452 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3453 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3455 /* We must init $/ before switches are processed. */
3456 sv_setpvs(get_sv("/", GV_ADD), "\n");
3460 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3461 bool *suidscript, PerlIO **rsfpp)
3466 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3469 PL_origfilename = savepvs("-e");
3472 /* if find_script() returns, it returns a malloc()-ed value */
3473 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3475 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3476 const char *s = scriptname + 8;
3482 * Tell apart "normal" usage of fdscript, e.g.
3483 * with bash on FreeBSD:
3484 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3485 * from usage in suidperl.
3486 * Does any "normal" usage leave garbage after the number???
3487 * Is it a mistake to use a similar /dev/fd/ construct for
3492 * Be supersafe and do some sanity-checks.
3493 * Still, can we be sure we got the right thing?
3496 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3499 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3501 scriptname = savepv(s + 1);
3502 Safefree(PL_origfilename);
3503 PL_origfilename = (char *)scriptname;
3508 CopFILE_free(PL_curcop);
3509 CopFILE_set(PL_curcop, PL_origfilename);
3510 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3511 scriptname = (char *)"";
3512 if (fdscript >= 0) {
3513 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3514 # if defined(HAS_FCNTL) && defined(F_SETFD)
3516 /* ensure close-on-exec */
3517 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3520 else if (!*scriptname) {
3521 forbid_setid(0, *suidscript);
3522 *rsfpp = PerlIO_stdin();
3525 #ifdef FAKE_BIT_BUCKET
3526 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3527 * is called) and still have the "-e" work. (Believe it or not,
3528 * a /dev/null is required for the "-e" to work because source
3529 * filter magic is used to implement it. ) This is *not* a general
3530 * replacement for a /dev/null. What we do here is create a temp
3531 * file (an empty file), open up that as the script, and then
3532 * immediately close and unlink it. Close enough for jazz. */
3533 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3534 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3535 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3536 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3537 FAKE_BIT_BUCKET_TEMPLATE
3539 const char * const err = "Failed to create a fake bit bucket";
3540 if (strEQ(scriptname, BIT_BUCKET)) {
3541 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3542 int tmpfd = mkstemp(tmpname);
3544 scriptname = tmpname;
3547 Perl_croak(aTHX_ err);
3550 scriptname = mktemp(tmpname);
3552 Perl_croak(aTHX_ err);
3557 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3558 #ifdef FAKE_BIT_BUCKET
3559 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3560 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3561 && strlen(scriptname) == sizeof(tmpname) - 1) {
3564 scriptname = BIT_BUCKET;
3566 # if defined(HAS_FCNTL) && defined(F_SETFD)
3568 /* ensure close-on-exec */
3569 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3573 /* PSz 16 Sep 03 Keep neat error message */
3575 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3577 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3578 CopFILE(PL_curcop), Strerror(errno));
3584 * I_SYSSTATVFS HAS_FSTATVFS
3586 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3587 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3588 * here so that metaconfig picks them up. */
3591 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3592 /* Don't even need this function. */
3595 S_validate_suid(pTHX_ PerlIO *rsfp)
3597 PERL_ARGS_ASSERT_VALIDATE_SUID;
3599 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3602 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3603 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3605 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3608 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3609 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3610 /* not set-id, must be wrapped */
3613 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3616 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3620 register const char *s2;
3622 PERL_ARGS_ASSERT_FIND_BEGINNING;
3624 /* skip forward in input to the real script? */
3626 while (PL_doextract) {
3627 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3628 Perl_croak(aTHX_ "No Perl script found in input\n");
3630 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3631 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3632 PL_doextract = FALSE;
3633 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3635 while (*s == ' ' || *s == '\t') s++;
3637 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3638 || s2[-1] == '_') s2--;
3639 if (strnEQ(s2-4,"perl",4))
3640 while ((s = moreswitches(s)))
3652 PL_uid = PerlProc_getuid();
3653 PL_euid = PerlProc_geteuid();
3654 PL_gid = PerlProc_getgid();
3655 PL_egid = PerlProc_getegid();
3657 PL_uid |= PL_gid << 16;
3658 PL_euid |= PL_egid << 16;
3660 /* Should not happen: */
3661 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3662 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3665 * Should go by suidscript, not uid!=euid: why disallow
3666 * system("ls") in scripts run from setuid things?
3667 * Or, is this run before we check arguments and set suidscript?
3668 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3669 * (We never have suidscript, can we be sure to have fdscript?)
3670 * Or must then go by UID checks? See comments in forbid_setid also.
3674 /* This is used very early in the lifetime of the program,
3675 * before even the options are parsed, so PL_tainting has
3676 * not been initialized properly. */
3678 Perl_doing_taint(int argc, char *argv[], char *envp[])
3680 #ifndef PERL_IMPLICIT_SYS
3681 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3682 * before we have an interpreter-- and the whole point of this
3683 * function is to be called at such an early stage. If you are on
3684 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3685 * "tainted because running with altered effective ids', you'll
3686 * have to add your own checks somewhere in here. The two most
3687 * known samples of 'implicitness' are Win32 and NetWare, neither
3688 * of which has much of concept of 'uids'. */
3689 int uid = PerlProc_getuid();
3690 int euid = PerlProc_geteuid();
3691 int gid = PerlProc_getgid();
3692 int egid = PerlProc_getegid();
3699 if (uid && (euid != uid || egid != gid))
3701 #endif /* !PERL_IMPLICIT_SYS */
3702 /* This is a really primitive check; environment gets ignored only
3703 * if -T are the first chars together; otherwise one gets
3704 * "Too late" message. */
3705 if ( argc > 1 && argv[1][0] == '-'
3706 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3711 /* Passing the flag as a single char rather than a string is a slight space
3712 optimisation. The only message that isn't /^-.$/ is
3713 "program input from stdin", which is substituted in place of '\0', which
3714 could never be a command line flag. */
3716 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3719 char string[3] = "-x";
3720 const char *message = "program input from stdin";
3727 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3728 if (PL_euid != PL_uid)
3729 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3730 if (PL_egid != PL_gid)
3731 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3732 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3734 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3738 Perl_init_debugger(pTHX)
3741 HV * const ostash = PL_curstash;
3743 PL_curstash = PL_debstash;
3744 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3746 AvREAL_off(PL_dbargs);
3747 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3748 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3749 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3750 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3751 sv_setiv(PL_DBsingle, 0);
3752 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3753 sv_setiv(PL_DBtrace, 0);
3754 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3755 sv_setiv(PL_DBsignal, 0);
3756 PL_curstash = ostash;
3759 #ifndef STRESS_REALLOC
3760 #define REASONABLE(size) (size)
3762 #define REASONABLE(size) (1) /* unreasonable */
3766 Perl_init_stacks(pTHX)
3769 /* start with 128-item stack and 8K cxstack */
3770 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3771 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3772 PL_curstackinfo->si_type = PERLSI_MAIN;
3773 PL_curstack = PL_curstackinfo->si_stack;
3774 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3776 PL_stack_base = AvARRAY(PL_curstack);
3777 PL_stack_sp = PL_stack_base;
3778 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3780 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3783 PL_tmps_max = REASONABLE(128);
3785 Newx(PL_markstack,REASONABLE(32),I32);
3786 PL_markstack_ptr = PL_markstack;
3787 PL_markstack_max = PL_markstack + REASONABLE(32);
3791 Newx(PL_scopestack,REASONABLE(32),I32);
3792 PL_scopestack_ix = 0;
3793 PL_scopestack_max = REASONABLE(32);
3795 Newx(PL_savestack,REASONABLE(128),ANY);
3796 PL_savestack_ix = 0;
3797 PL_savestack_max = REASONABLE(128);
3806 while (PL_curstackinfo->si_next)
3807 PL_curstackinfo = PL_curstackinfo->si_next;
3808 while (PL_curstackinfo) {
3809 PERL_SI *p = PL_curstackinfo->si_prev;
3810 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3811 Safefree(PL_curstackinfo->si_cxstack);
3812 Safefree(PL_curstackinfo);
3813 PL_curstackinfo = p;
3815 Safefree(PL_tmps_stack);
3816 Safefree(PL_markstack);
3817 Safefree(PL_scopestack);
3818 Safefree(PL_savestack);
3823 S_init_predump_symbols(pTHX)
3829 sv_setpvs(get_sv("\"", GV_ADD), " ");
3830 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3832 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3833 GvMULTI_on(PL_stdingv);
3834 io = GvIOp(PL_stdingv);
3835 IoTYPE(io) = IoTYPE_RDONLY;
3836 IoIFP(io) = PerlIO_stdin();
3837 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3839 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3841 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3844 IoTYPE(io) = IoTYPE_WRONLY;
3845 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3847 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3849 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3851 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3852 GvMULTI_on(PL_stderrgv);
3853 io = GvIOp(PL_stderrgv);
3854 IoTYPE(io) = IoTYPE_WRONLY;
3855 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3856 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3858 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3860 PL_statname = newSV(0); /* last filename we did stat on */
3862 Safefree(PL_osname);
3863 PL_osname = savepv(OSNAME);
3867 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3871 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3873 argc--,argv++; /* skip name of script */
3874 if (PL_doswitches) {
3875 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3879 if (argv[0][1] == '-' && !argv[0][2]) {
3883 if ((s = strchr(argv[0], '='))) {
3884 const char *const start_name = argv[0] + 1;
3885 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3886 TRUE, SVt_PV)), s + 1);
3889 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3892 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3893 GvMULTI_on(PL_argvgv);
3894 (void)gv_AVadd(PL_argvgv);
3895 av_clear(GvAVn(PL_argvgv));
3896 for (; argc > 0; argc--,argv++) {
3897 SV * const sv = newSVpv(argv[0],0);
3898 av_push(GvAVn(PL_argvgv),sv);
3899 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3900 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3903 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3904 (void)sv_utf8_decode(sv);
3910 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3915 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3917 PL_toptarget = newSV_type(SVt_PVFM);
3918 sv_setpvs(PL_toptarget, "");
3919 PL_bodytarget = newSV_type(SVt_PVFM);
3920 sv_setpvs(PL_bodytarget, "");
3921 PL_formtarget = PL_bodytarget;
3925 init_argv_symbols(argc,argv);
3927 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3928 sv_setpv(GvSV(tmpgv),PL_origfilename);
3930 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3932 bool env_is_not_environ;
3933 GvMULTI_on(PL_envgv);
3934 hv = GvHVn(PL_envgv);
3935 hv_magic(hv, NULL, PERL_MAGIC_env);
3937 #ifdef USE_ENVIRON_ARRAY
3938 /* Note that if the supplied env parameter is actually a copy
3939 of the global environ then it may now point to free'd memory
3940 if the environment has been modified since. To avoid this
3941 problem we treat env==NULL as meaning 'use the default'
3945 env_is_not_environ = env != environ;
3946 if (env_is_not_environ
3947 # ifdef USE_ITHREADS
3948 && PL_curinterp == aTHX
3957 for (; *env; env++) {
3960 if (!(s = strchr(old_var,'=')) || s == old_var)
3963 #if defined(MSDOS) && !defined(DJGPP)
3965 (void)strupr(old_var);
3968 sv = newSVpv(s+1, 0);
3969 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3970 if (env_is_not_environ)
3974 #endif /* USE_ENVIRON_ARRAY */
3975 #endif /* !PERL_MICRO */
3978 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3979 SvREADONLY_off(GvSV(tmpgv));
3980 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
3981 SvREADONLY_on(GvSV(tmpgv));
3983 #ifdef THREADS_HAVE_PIDS
3984 PL_ppid = (IV)getppid();
3987 /* touch @F array to prevent spurious warnings 20020415 MJD */
3989 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
3994 S_init_perllib(pTHX)
3998 const char *perl5lib = NULL;
4007 perl5lib = PerlEnv_getenv("PERL5LIB");
4009 * It isn't possible to delete an environment variable with
4010 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4011 * case we treat PERL5LIB as undefined if it has a zero-length value.
4013 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4014 if (perl5lib && *perl5lib != '\0')
4018 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4020 s = PerlEnv_getenv("PERLLIB");
4022 incpush_use_sep(s, 0, 0);
4025 /* Treat PERL5?LIB as a possible search list logical name -- the
4026 * "natural" VMS idiom for a Unix path string. We allow each
4027 * element to be a set of |-separated directories for compatibility.
4031 if (my_trnlnm("PERL5LIB",buf,0))
4033 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4034 } while (my_trnlnm("PERL5LIB",buf,++idx));
4036 while (my_trnlnm("PERLLIB",buf,idx++))
4037 incpush_use_sep(buf, 0, 0);
4042 /* Use the ~-expanded versions of APPLLIB (undocumented),
4043 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4046 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4047 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4051 /* sitearch is always relative to sitelib on Windows for
4052 * DLL-based path intuition to work correctly */
4053 # if !defined(WIN32)
4054 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4055 INCPUSH_CAN_RELOCATE);
4061 /* this picks up sitearch as well */
4062 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4064 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4066 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4070 #ifdef PERL_VENDORARCH_EXP
4071 /* vendorarch is always relative to vendorlib on Windows for
4072 * DLL-based path intuition to work correctly */
4073 # if !defined(WIN32)
4074 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4075 INCPUSH_CAN_RELOCATE);
4079 #ifdef PERL_VENDORLIB_EXP
4081 /* this picks up vendorarch as well */
4082 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4084 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4086 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4087 INCPUSH_CAN_RELOCATE);
4092 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4096 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4100 s = win32_get_privlib(PERL_FS_VERSION, &len);
4102 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4105 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4107 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4111 #ifdef PERL_OTHERLIBDIRS
4112 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4113 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4114 |INCPUSH_CAN_RELOCATE);
4120 * It isn't possible to delete an environment variable with
4121 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4122 * case we treat PERL5LIB as undefined if it has a zero-length value.
4124 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4125 if (perl5lib && *perl5lib != '\0')
4129 incpush_use_sep(perl5lib, 0,
4130 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4132 /* Treat PERL5?LIB as a possible search list logical name -- the
4133 * "natural" VMS idiom for a Unix path string. We allow each
4134 * element to be a set of |-separated directories for compatibility.
4138 if (my_trnlnm("PERL5LIB",buf,0))
4140 incpush_use_sep(buf, 0,
4141 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4142 } while (my_trnlnm("PERL5LIB",buf,++idx));
4146 /* Use the ~-expanded versions of APPLLIB (undocumented),
4147 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4150 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4151 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4154 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4155 /* Search for version-specific dirs below here */
4156 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4157 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4161 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4162 /* Search for version-specific dirs below here */
4163 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4164 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4167 #ifdef PERL_OTHERLIBDIRS
4168 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4169 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4170 |INCPUSH_CAN_RELOCATE);
4174 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4177 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4178 # define PERLLIB_SEP ';'
4181 # define PERLLIB_SEP '|'
4183 # define PERLLIB_SEP ':'
4186 #ifndef PERLLIB_MANGLE
4187 # define PERLLIB_MANGLE(s,n) (s)
4190 /* Push a directory onto @INC if it exists.
4191 Generate a new SV if we do this, to save needing to copy the SV we push
4194 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4199 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4201 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4202 S_ISDIR(tmpstatbuf.st_mode)) {
4204 dir = newSVsv(stem);
4206 /* Truncate dir back to stem. */
4207 SvCUR_set(dir, SvCUR(stem));
4213 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4216 const U8 using_sub_dirs
4217 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4218 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4219 const U8 add_versioned_sub_dirs
4220 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4221 const U8 add_archonly_sub_dirs
4222 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4223 #ifdef PERL_INC_VERSION_LIST
4224 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4226 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4227 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4228 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4229 AV *const inc = GvAVn(PL_incgv);
4231 PERL_ARGS_ASSERT_INCPUSH;
4234 /* Could remove this vestigial extra block, if we don't mind a lot of
4235 re-indenting diff noise. */
4238 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4239 arranged to unshift #! line -I onto the front of @INC. However,
4240 -I can add version and architecture specific libraries, and they
4241 need to go first. The old code assumed that it was always
4242 pushing. Hence to make it work, need to push the architecture
4243 (etc) libraries onto a temporary array, then "unshift" that onto
4244 the front of @INC. */
4245 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4248 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4249 defined to so something (in os2/os2.c), but the code has been
4250 this way, ignoring any possible changed of length, since
4251 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4253 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4255 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4258 /* Do the if() outside the #ifdef to avoid warnings about an unused
4261 #ifdef PERL_RELOCATABLE_INC
4263 * Relocatable include entries are marked with a leading .../
4266 * 0: Remove that leading ".../"
4267 * 1: Remove trailing executable name (anything after the last '/')
4268 * from the perl path to give a perl prefix
4270 * While the @INC element starts "../" and the prefix ends with a real
4271 * directory (ie not . or ..) chop that real directory off the prefix
4272 * and the leading "../" from the @INC element. ie a logical "../"
4274 * Finally concatenate the prefix and the remainder of the @INC element
4275 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4276 * generates /usr/local/lib/perl5
4278 const char *libpath = SvPVX(libdir);
4279 STRLEN libpath_len = SvCUR(libdir);
4280 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4282 SV * const caret_X = get_sv("\030", 0);
4283 /* Going to use the SV just as a scratch buffer holding a C
4289 /* $^X is *the* source of taint if tainting is on, hence
4290 SvPOK() won't be true. */
4292 assert(SvPOKp(caret_X));
4293 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4295 /* Firstly take off the leading .../
4296 If all else fail we'll do the paths relative to the current
4298 sv_chop(libdir, libpath + 4);
4299 /* Don't use SvPV as we're intentionally bypassing taining,
4300 mortal copies that the mg_get of tainting creates, and
4301 corruption that seems to come via the save stack.
4302 I guess that the save stack isn't correctly set up yet. */
4303 libpath = SvPVX(libdir);
4304 libpath_len = SvCUR(libdir);
4306 /* This would work more efficiently with memrchr, but as it's
4307 only a GNU extension we'd need to probe for it and
4308 implement our own. Not hard, but maybe not worth it? */
4310 prefix = SvPVX(prefix_sv);
4311 lastslash = strrchr(prefix, '/');
4313 /* First time in with the *lastslash = '\0' we just wipe off
4314 the trailing /perl from (say) /usr/foo/bin/perl
4318 while ((*lastslash = '\0'), /* Do that, come what may. */
4319 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4320 && (lastslash = strrchr(prefix, '/')))) {
4321 if (lastslash[1] == '\0'
4322 || (lastslash[1] == '.'
4323 && (lastslash[2] == '/' /* ends "/." */
4324 || (lastslash[2] == '/'
4325 && lastslash[3] == '/' /* or "/.." */
4327 /* Prefix ends "/" or "/." or "/..", any of which
4328 are fishy, so don't do any more logical cleanup.
4332 /* Remove leading "../" from path */
4335 /* Next iteration round the loop removes the last
4336 directory name from prefix by writing a '\0' in
4337 the while clause. */
4339 /* prefix has been terminated with a '\0' to the correct
4340 length. libpath points somewhere into the libdir SV.
4341 We need to join the 2 with '/' and drop the result into
4343 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4344 SvREFCNT_dec(libdir);
4345 /* And this is the new libdir. */
4348 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4349 /* Need to taint reloccated paths if running set ID */
4350 SvTAINTED_on(libdir);
4353 SvREFCNT_dec(prefix_sv);
4358 * BEFORE pushing libdir onto @INC we may first push version- and
4359 * archname-specific sub-directories.
4361 if (using_sub_dirs) {
4363 #ifdef PERL_INC_VERSION_LIST
4364 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4365 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4366 const char * const *incver;
4373 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4375 while (unix[len-1] == '/') len--; /* Cosmetic */
4376 sv_usepvn(libdir,unix,len);
4379 PerlIO_printf(Perl_error_log,
4380 "Failed to unixify @INC element \"%s\"\n",
4384 subdir = newSVsv(libdir);
4386 if (add_versioned_sub_dirs) {
4387 /* .../version/archname if -d .../version/archname */
4388 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4389 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4391 /* .../version if -d .../version */
4392 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4393 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4396 #ifdef PERL_INC_VERSION_LIST
4398 for (incver = incverlist; *incver; incver++) {
4399 /* .../xxx if -d .../xxx */
4400 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4401 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4406 if (add_archonly_sub_dirs) {
4407 /* .../archname if -d .../archname */
4408 sv_catpvs(subdir, "/" ARCHNAME);
4409 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4413 assert (SvREFCNT(subdir) == 1);
4414 SvREFCNT_dec(subdir);
4417 /* finally add this lib directory at the end of @INC */
4419 U32 extra = av_len(av) + 1;
4420 av_unshift(inc, extra + push_basedir);
4422 av_store(inc, extra, libdir);
4424 /* av owns a reference, av_store() expects to be donated a
4425 reference, and av expects to be sane when it's cleared.
4426 If I wanted to be naughty and wrong, I could peek inside the
4427 implementation of av_clear(), realise that it uses
4428 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4429 and so directly steal from it (with a memcpy() to inc, and
4430 then memset() to NULL them out. But people copy code from the
4431 core expecting it to be best practise, so let's use the API.
4432 Although studious readers will note that I'm not checking any
4434 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4438 else if (push_basedir) {
4439 av_push(inc, libdir);
4442 if (!push_basedir) {
4443 assert (SvREFCNT(libdir) == 1);
4444 SvREFCNT_dec(libdir);
4450 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4454 /* This logic has been broken out from S_incpush(). It may be possible to
4457 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4464 /* Break at all separators */
4465 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4467 /* skip any consecutive separators */
4469 /* Uncomment the next line for PATH semantics */
4470 /* But you'll need to write tests */
4471 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4473 incpush(p, (STRLEN)(s - p), flags);
4478 incpush(p, (STRLEN)(end - p), flags);
4483 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4487 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4493 PERL_ARGS_ASSERT_CALL_LIST;
4495 while (av_len(paramList) >= 0) {
4496 cv = MUTABLE_CV(av_shift(paramList));
4498 if (paramList == PL_beginav) {
4499 /* save PL_beginav for compiler */
4500 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4502 else if (paramList == PL_checkav) {
4503 /* save PL_checkav for compiler */
4504 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4506 else if (paramList == PL_unitcheckav) {
4507 /* save PL_unitcheckav for compiler */
4508 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4519 PL_madskills |= 16384;
4524 PL_madskills &= ~16384;
4527 (void)SvPV_const(atsv, len);
4529 PL_curcop = &PL_compiling;
4530 CopLINE_set(PL_curcop, oldline);
4531 if (paramList == PL_beginav)
4532 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4534 Perl_sv_catpvf(aTHX_ atsv,
4535 "%s failed--call queue aborted",
4536 paramList == PL_checkav ? "CHECK"
4537 : paramList == PL_initav ? "INIT"
4538 : paramList == PL_unitcheckav ? "UNITCHECK"
4540 while (PL_scopestack_ix > oldscope)
4543 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4550 /* my_exit() was called */
4551 while (PL_scopestack_ix > oldscope)
4554 PL_curstash = PL_defstash;
4555 PL_curcop = &PL_compiling;
4556 CopLINE_set(PL_curcop, oldline);
4558 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4559 if (paramList == PL_beginav)
4560 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4562 Perl_croak(aTHX_ "%s failed--call queue aborted",
4563 paramList == PL_checkav ? "CHECK"
4564 : paramList == PL_initav ? "INIT"
4565 : paramList == PL_unitcheckav ? "UNITCHECK"
4572 PL_curcop = &PL_compiling;
4573 CopLINE_set(PL_curcop, oldline);
4576 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4585 Perl_my_exit(pTHX_ U32 status)
4596 STATUS_EXIT_SET(status);
4603 Perl_my_failure_exit(pTHX)
4607 /* We have been called to fall on our sword. The desired exit code
4608 * should be already set in STATUS_UNIX, but could be shifted over
4609 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4612 * If an error code has not been set, then force the issue.
4614 if (MY_POSIX_EXIT) {
4616 /* According to the die_exit.t tests, if errno is non-zero */
4617 /* It should be used for the error status. */
4619 if (errno == EVMSERR) {
4620 STATUS_NATIVE = vaxc$errno;
4623 /* According to die_exit.t tests, if the child_exit code is */
4624 /* also zero, then we need to exit with a code of 255 */
4625 if ((errno != 0) && (errno < 256))
4626 STATUS_UNIX_EXIT_SET(errno);
4627 else if (STATUS_UNIX < 255) {
4628 STATUS_UNIX_EXIT_SET(255);
4633 /* The exit code could have been set by $? or vmsish which
4634 * means that it may not have fatal set. So convert
4635 * success/warning codes to fatal with out changing
4636 * the POSIX status code. The severity makes VMS native
4637 * status handling work, while UNIX mode programs use the
4638 * the POSIX exit codes.
4640 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4641 STATUS_NATIVE &= STS$M_COND_ID;
4642 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4646 /* Traditionally Perl on VMS always expects a Fatal Error. */
4647 if (vaxc$errno & 1) {
4649 /* So force success status to failure */
4650 if (STATUS_NATIVE & 1)
4655 STATUS_UNIX = EINTR; /* In case something cares */
4660 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4662 /* Encode the severity code */
4663 severity = STATUS_NATIVE & STS$M_SEVERITY;
4664 STATUS_UNIX = (severity ? severity : 1) << 8;
4666 /* Perl expects this to be a fatal error */
4667 if (severity != STS$K_SEVERE)
4676 STATUS_UNIX_SET(errno);
4678 exitstatus = STATUS_UNIX >> 8;
4679 if (exitstatus & 255)
4680 STATUS_UNIX_SET(exitstatus);
4682 STATUS_UNIX_SET(255);
4689 S_my_exit_jump(pTHX)
4694 SvREFCNT_dec(PL_e_script);
4698 POPSTACK_TO(PL_mainstack);
4706 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4709 const char * const p = SvPVX_const(PL_e_script);
4710 const char *nl = strchr(p, '\n');
4712 PERL_UNUSED_ARG(idx);
4713 PERL_UNUSED_ARG(maxlen);
4715 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4717 filter_del(read_e_script);
4720 sv_catpvn(buf_sv, p, nl-p);
4721 sv_chop(PL_e_script, nl);
4727 * c-indentation-style: bsd
4729 * indent-tabs-mode: t
4732 * ex: set ts=8 sts=4 sw=4 noet: