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_ascii);
989 SvREFCNT_dec(PL_utf8_alpha);
990 SvREFCNT_dec(PL_utf8_space);
991 SvREFCNT_dec(PL_utf8_cntrl);
992 SvREFCNT_dec(PL_utf8_graph);
993 SvREFCNT_dec(PL_utf8_digit);
994 SvREFCNT_dec(PL_utf8_upper);
995 SvREFCNT_dec(PL_utf8_lower);
996 SvREFCNT_dec(PL_utf8_print);
997 SvREFCNT_dec(PL_utf8_punct);
998 SvREFCNT_dec(PL_utf8_xdigit);
999 SvREFCNT_dec(PL_utf8_mark);
1000 SvREFCNT_dec(PL_utf8_toupper);
1001 SvREFCNT_dec(PL_utf8_totitle);
1002 SvREFCNT_dec(PL_utf8_tolower);
1003 SvREFCNT_dec(PL_utf8_tofold);
1004 SvREFCNT_dec(PL_utf8_idstart);
1005 SvREFCNT_dec(PL_utf8_idcont);
1006 PL_utf8_alnum = NULL;
1007 PL_utf8_ascii = NULL;
1008 PL_utf8_alpha = NULL;
1009 PL_utf8_space = NULL;
1010 PL_utf8_cntrl = NULL;
1011 PL_utf8_graph = NULL;
1012 PL_utf8_digit = NULL;
1013 PL_utf8_upper = NULL;
1014 PL_utf8_lower = NULL;
1015 PL_utf8_print = NULL;
1016 PL_utf8_punct = NULL;
1017 PL_utf8_xdigit = NULL;
1018 PL_utf8_mark = NULL;
1019 PL_utf8_toupper = NULL;
1020 PL_utf8_totitle = NULL;
1021 PL_utf8_tolower = NULL;
1022 PL_utf8_tofold = NULL;
1023 PL_utf8_idstart = NULL;
1024 PL_utf8_idcont = NULL;
1026 if (!specialWARN(PL_compiling.cop_warnings))
1027 PerlMemShared_free(PL_compiling.cop_warnings);
1028 PL_compiling.cop_warnings = NULL;
1029 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1030 PL_compiling.cop_hints_hash = NULL;
1031 CopFILE_free(&PL_compiling);
1032 CopSTASH_free(&PL_compiling);
1034 /* Prepare to destruct main symbol table. */
1039 SvREFCNT_dec(PL_curstname);
1040 PL_curstname = NULL;
1042 /* clear queued errors */
1043 SvREFCNT_dec(PL_errors);
1046 SvREFCNT_dec(PL_isarev);
1049 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1050 if (PL_scopestack_ix != 0)
1051 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1052 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1053 (long)PL_scopestack_ix);
1054 if (PL_savestack_ix != 0)
1055 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1056 "Unbalanced saves: %ld more saves than restores\n",
1057 (long)PL_savestack_ix);
1058 if (PL_tmps_floor != -1)
1059 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1060 (long)PL_tmps_floor + 1);
1061 if (cxstack_ix != -1)
1062 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1063 (long)cxstack_ix + 1);
1066 /* Now absolutely destruct everything, somehow or other, loops or no. */
1068 /* the 2 is for PL_fdpid and PL_strtab */
1069 while (sv_clean_all() > 2)
1072 AvREAL_off(PL_fdpid); /* no surviving entries */
1073 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1076 #ifdef HAVE_INTERP_INTERN
1080 /* Destruct the global string table. */
1082 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1083 * so that sv_free() won't fail on them.
1084 * Now that the global string table is using a single hunk of memory
1085 * for both HE and HEK, we either need to explicitly unshare it the
1086 * correct way, or actually free things here.
1089 const I32 max = HvMAX(PL_strtab);
1090 HE * const * const array = HvARRAY(PL_strtab);
1091 HE *hent = array[0];
1094 if (hent && ckWARN_d(WARN_INTERNAL)) {
1095 HE * const next = HeNEXT(hent);
1096 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1097 "Unbalanced string table refcount: (%ld) for \"%s\"",
1098 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1105 hent = array[riter];
1110 HvARRAY(PL_strtab) = 0;
1111 HvTOTALKEYS(PL_strtab) = 0;
1112 HvFILL(PL_strtab) = 0;
1114 SvREFCNT_dec(PL_strtab);
1117 /* free the pointer tables used for cloning */
1118 ptr_table_free(PL_ptr_table);
1119 PL_ptr_table = (PTR_TBL_t*)NULL;
1122 /* free special SVs */
1124 SvREFCNT(&PL_sv_yes) = 0;
1125 sv_clear(&PL_sv_yes);
1126 SvANY(&PL_sv_yes) = NULL;
1127 SvFLAGS(&PL_sv_yes) = 0;
1129 SvREFCNT(&PL_sv_no) = 0;
1130 sv_clear(&PL_sv_no);
1131 SvANY(&PL_sv_no) = NULL;
1132 SvFLAGS(&PL_sv_no) = 0;
1136 for (i=0; i<=2; i++) {
1137 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1138 sv_clear(PERL_DEBUG_PAD(i));
1139 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1140 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1144 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1145 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1147 #ifdef DEBUG_LEAKING_SCALARS
1148 if (PL_sv_count != 0) {
1153 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1154 svend = &sva[SvREFCNT(sva)];
1155 for (sv = sva + 1; sv < svend; ++sv) {
1156 if (SvTYPE(sv) != SVTYPEMASK) {
1157 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1159 " refcnt=%"UVuf pTHX__FORMAT "\n"
1160 "\tallocated at %s:%d %s %s%s\n",
1161 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1163 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1165 sv->sv_debug_inpad ? "for" : "by",
1166 sv->sv_debug_optype ?
1167 PL_op_name[sv->sv_debug_optype]: "(none)",
1168 sv->sv_debug_cloned ? " (cloned)" : ""
1170 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1171 Perl_dump_sv_child(aTHX_ sv);
1177 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1181 /* Wait for up to 4 seconds for child to terminate.
1182 This seems to be the least effort way of timing out on reaping
1184 struct timeval waitfor = {4, 0};
1185 int sock = PL_dumper_fd;
1189 FD_SET(sock, &rset);
1190 select(sock + 1, &rset, NULL, NULL, &waitfor);
1191 waitpid(child, &status, WNOHANG);
1196 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1202 #ifdef PERL_DEBUG_READONLY_OPS
1208 #if defined(PERLIO_LAYERS)
1209 /* No more IO - including error messages ! */
1210 PerlIO_cleanup(aTHX);
1213 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1214 as currently layers use it rather than NULL as a marker
1215 for no arg - and will try and SvREFCNT_dec it.
1217 SvREFCNT(&PL_sv_undef) = 0;
1218 SvREADONLY_off(&PL_sv_undef);
1220 Safefree(PL_origfilename);
1221 PL_origfilename = NULL;
1222 Safefree(PL_reg_start_tmp);
1223 PL_reg_start_tmp = (char**)NULL;
1224 PL_reg_start_tmpl = 0;
1225 Safefree(PL_reg_curpm);
1226 Safefree(PL_reg_poscache);
1227 free_tied_hv_pool();
1228 Safefree(PL_op_mask);
1229 Safefree(PL_psig_name);
1230 PL_psig_name = (SV**)NULL;
1231 PL_psig_ptr = (SV**)NULL;
1232 Safefree(PL_psig_pend);
1233 PL_psig_pend = (int*)NULL;
1235 /* We need to NULL PL_psig_pend first, so that
1236 signal handlers know not to use it */
1237 int *psig_save = PL_psig_pend;
1238 PL_psig_pend = (int*)NULL;
1239 Safefree(psig_save);
1243 PL_tainting = FALSE;
1244 PL_taint_warn = FALSE;
1245 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1248 DEBUG_P(debprofdump());
1250 #ifdef USE_REENTRANT_API
1251 Perl_reentrant_free(aTHX);
1256 while (PL_regmatch_slab) {
1257 regmatch_slab *s = PL_regmatch_slab;
1258 PL_regmatch_slab = PL_regmatch_slab->next;
1262 /* As the absolutely last thing, free the non-arena SV for mess() */
1265 /* we know that type == SVt_PVMG */
1267 /* it could have accumulated taint magic */
1270 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1271 moremagic = mg->mg_moremagic;
1272 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1274 Safefree(mg->mg_ptr);
1278 /* we know that type >= SVt_PV */
1279 SvPV_free(PL_mess_sv);
1280 Safefree(SvANY(PL_mess_sv));
1281 Safefree(PL_mess_sv);
1288 =for apidoc perl_free
1290 Releases a Perl interpreter. See L<perlembed>.
1300 PERL_ARGS_ASSERT_PERL_FREE;
1302 if (PL_veto_cleanup)
1305 #ifdef PERL_TRACK_MEMPOOL
1308 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1309 * value as we're probably hunting memory leaks then
1311 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1312 if (!s || atoi(s) == 0) {
1313 const U32 old_debug = PL_debug;
1314 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1315 thread at thread exit. */
1317 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1318 "free this thread's memory\n");
1319 PL_debug &= ~ DEBUG_m_FLAG;
1321 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1322 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1323 PL_debug = old_debug;
1328 #if defined(WIN32) || defined(NETWARE)
1329 # if defined(PERL_IMPLICIT_SYS)
1332 void *host = nw_internal_host;
1334 void *host = w32_internal_host;
1336 PerlMem_free(aTHXx);
1338 nw_delete_internal_host(host);
1340 win32_delete_internal_host(host);
1344 PerlMem_free(aTHXx);
1347 PerlMem_free(aTHXx);
1351 #if defined(USE_ITHREADS)
1352 /* provide destructors to clean up the thread key when libperl is unloaded */
1353 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1355 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1356 #pragma fini "perl_fini"
1357 #elif defined(__sun) && !defined(__GNUC__)
1358 #pragma fini (perl_fini)
1362 #if defined(__GNUC__)
1363 __attribute__((destructor))
1368 if (PL_curinterp && !PL_veto_cleanup)
1373 #endif /* THREADS */
1376 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1379 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1380 PL_exitlist[PL_exitlistlen].fn = fn;
1381 PL_exitlist[PL_exitlistlen].ptr = ptr;
1385 #ifdef HAS_PROCSELFEXE
1386 /* This is a function so that we don't hold on to MAXPATHLEN
1387 bytes of stack longer than necessary
1390 S_procself_val(pTHX_ SV *sv, const char *arg0)
1392 char buf[MAXPATHLEN];
1393 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1395 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1396 includes a spurious NUL which will cause $^X to fail in system
1397 or backticks (this will prevent extensions from being built and
1398 many tests from working). readlink is not meant to add a NUL.
1399 Normal readlink works fine.
1401 if (len > 0 && buf[len-1] == '\0') {
1405 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1406 returning the text "unknown" from the readlink rather than the path
1407 to the executable (or returning an error from the readlink). Any valid
1408 path has a '/' in it somewhere, so use that to validate the result.
1409 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1411 if (len > 0 && memchr(buf, '/', len)) {
1412 sv_setpvn(sv,buf,len);
1418 #endif /* HAS_PROCSELFEXE */
1421 S_set_caret_X(pTHX) {
1423 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1425 #ifdef HAS_PROCSELFEXE
1426 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1429 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1431 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1438 =for apidoc perl_parse
1440 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1446 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1453 PERL_ARGS_ASSERT_PERL_PARSE;
1454 #ifndef MULTIPLICITY
1455 PERL_UNUSED_ARG(my_perl);
1458 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1459 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1460 * This MUST be done before any hash stores or fetches take place.
1461 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1462 * yourself, it is your responsibility to provide a good random seed!
1463 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1464 if (!PL_rehash_seed_set)
1465 PL_rehash_seed = get_hash_seed();
1467 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1469 if (s && (atoi(s) == 1))
1470 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1472 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1477 if (PL_origalen != 0) {
1478 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1481 /* Set PL_origalen be the sum of the contiguous argv[]
1482 * elements plus the size of the env in case that it is
1483 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1484 * as the maximum modifiable length of $0. In the worst case
1485 * the area we are able to modify is limited to the size of
1486 * the original argv[0]. (See below for 'contiguous', though.)
1488 const char *s = NULL;
1491 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1492 /* Do the mask check only if the args seem like aligned. */
1494 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1496 /* See if all the arguments are contiguous in memory. Note
1497 * that 'contiguous' is a loose term because some platforms
1498 * align the argv[] and the envp[]. If the arguments look
1499 * like non-aligned, assume that they are 'strictly' or
1500 * 'traditionally' contiguous. If the arguments look like
1501 * aligned, we just check that they are within aligned
1502 * PTRSIZE bytes. As long as no system has something bizarre
1503 * like the argv[] interleaved with some other data, we are
1504 * fine. (Did I just evoke Murphy's Law?) --jhi */
1505 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1507 for (i = 1; i < PL_origargc; i++) {
1508 if ((PL_origargv[i] == s + 1
1510 || PL_origargv[i] == s + 2
1515 (PL_origargv[i] > s &&
1517 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1528 #ifndef PERL_USE_SAFE_PUTENV
1529 /* Can we grab env area too to be used as the area for $0? */
1530 if (s && PL_origenviron && !PL_use_safe_putenv) {
1531 if ((PL_origenviron[0] == s + 1)
1534 (PL_origenviron[0] > s &&
1535 PL_origenviron[0] <=
1536 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1539 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1540 s = PL_origenviron[0];
1543 my_setenv("NoNe SuCh", NULL);
1544 /* Force copy of environment. */
1545 for (i = 1; PL_origenviron[i]; i++) {
1546 if (PL_origenviron[i] == s + 1
1549 (PL_origenviron[i] > s &&
1550 PL_origenviron[i] <=
1551 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1554 s = PL_origenviron[i];
1562 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1564 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1569 /* Come here if running an undumped a.out. */
1571 PL_origfilename = savepv(argv[0]);
1572 PL_do_undump = FALSE;
1573 cxstack_ix = -1; /* start label stack again */
1575 assert (!PL_tainted);
1577 S_set_caret_X(aTHX);
1579 init_postdump_symbols(argc,argv,env);
1584 op_free(PL_main_root);
1585 PL_main_root = NULL;
1587 PL_main_start = NULL;
1588 SvREFCNT_dec(PL_main_cv);
1592 oldscope = PL_scopestack_ix;
1593 PL_dowarn = G_WARN_OFF;
1598 parse_body(env,xsinit);
1600 call_list(oldscope, PL_unitcheckav);
1602 call_list(oldscope, PL_checkav);
1609 /* my_exit() was called */
1610 while (PL_scopestack_ix > oldscope)
1613 PL_curstash = PL_defstash;
1615 call_list(oldscope, PL_unitcheckav);
1617 call_list(oldscope, PL_checkav);
1621 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1629 #define INCPUSH_UNSHIFT 0x01
1630 #define INCPUSH_ADD_OLD_VERS 0x02
1631 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1632 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1633 #define INCPUSH_NOT_BASEDIR 0x10
1634 #define INCPUSH_CAN_RELOCATE 0x20
1635 #define INCPUSH_ADD_SUB_DIRS \
1636 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1639 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1643 int argc = PL_origargc;
1644 char **argv = PL_origargv;
1645 const char *scriptname = NULL;
1646 VOL bool dosearch = FALSE;
1648 const char *cddir = NULL;
1649 #ifdef USE_SITECUSTOMIZE
1650 bool minus_f = FALSE;
1652 SV *linestr_sv = newSV_type(SVt_PVIV);
1653 bool add_read_e_script = FALSE;
1655 SvGROW(linestr_sv, 80);
1656 sv_setpvs(linestr_sv,"");
1662 for (argc--,argv++; argc > 0; argc--,argv++) {
1663 if (argv[0][0] != '-' || !argv[0][1])
1669 #ifndef PERL_STRICT_CR
1693 if ((s = moreswitches(s)))
1698 CHECK_MALLOC_TOO_LATE_FOR('t');
1699 if( !PL_tainting ) {
1700 PL_taint_warn = TRUE;
1706 CHECK_MALLOC_TOO_LATE_FOR('T');
1708 PL_taint_warn = FALSE;
1716 forbid_setid('e', FALSE);
1718 PL_e_script = newSVpvs("");
1719 add_read_e_script = TRUE;
1722 sv_catpv(PL_e_script, s);
1724 sv_catpv(PL_e_script, argv[1]);
1728 Perl_croak(aTHX_ "No code specified for -%c", c);
1729 sv_catpvs(PL_e_script, "\n");
1733 #ifdef USE_SITECUSTOMIZE
1739 case 'I': /* -I handled both here and in moreswitches() */
1740 forbid_setid('I', FALSE);
1741 if (!*++s && (s=argv[1]) != NULL) {
1745 STRLEN len = strlen(s);
1746 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1749 Perl_croak(aTHX_ "No directory specified for -I");
1752 forbid_setid('S', FALSE);
1760 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1762 /* Can't do newSVpvs() as that would involve pre-processor
1763 condititionals inside a macro expansion. */
1764 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1771 # ifdef PERL_DISABLE_PMC
1774 # ifdef PERL_DONT_CREATE_GVSV
1775 " PERL_DONT_CREATE_GVSV"
1777 # ifdef PERL_MALLOC_WRAP
1780 # ifdef PERL_MEM_LOG
1783 # ifdef PERL_MEM_LOG_NOIMPL
1784 " PERL_MEM_LOG_NOIMPL"
1786 # ifdef PERL_USE_DEVEL
1789 # ifdef PERL_USE_SAFE_PUTENV
1790 " PERL_USE_SAFE_PUTENV"
1792 # ifdef USE_SITECUSTOMIZE
1793 " USE_SITECUSTOMIZE"
1795 # ifdef USE_FAST_STDIO
1800 sv_catpv(opts_prog, PL_bincompat_options);
1801 /* Terminate the qw(, and then wrap at 76 columns. */
1802 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1804 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1806 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1808 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1810 #if defined(LOCAL_PATCH_COUNT)
1811 if (LOCAL_PATCH_COUNT > 0) {
1813 sv_catpvs(opts_prog,
1814 "\" Locally applied patches:\\n\",");
1815 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1816 if (PL_localpatches[i])
1817 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1818 0, PL_localpatches[i], 0);
1822 Perl_sv_catpvf(aTHX_ opts_prog,
1823 "\" Built under %s\\n",OSNAME);
1826 sv_catpvs(opts_prog,
1827 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1829 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1832 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1833 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1834 "sort grep {/^PERL/} keys %ENV; ");
1836 sv_catpvs(opts_prog,
1837 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1839 sv_catpvs(opts_prog,
1840 "print \" \\%ENV:\\n @env\\n\" if @env;"
1841 "print \" \\@INC:\\n @INC\\n\";");
1845 opts_prog = Perl_newSVpvf(aTHX_
1846 "Config::config_vars(qw%c%s%c)",
1850 av_push(PL_preambleav, opts_prog);
1851 /* don't look for script or read stdin */
1852 scriptname = BIT_BUCKET;
1856 PL_doextract = TRUE;
1864 if (!*++s || isSPACE(*s)) {
1868 /* catch use of gnu style long options */
1869 if (strEQ(s, "version")) {
1873 if (strEQ(s, "help")) {
1880 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1891 #ifndef SECURE_INTERNAL_GETENV
1894 (s = PerlEnv_getenv("PERL5OPT")))
1898 if (*s == '-' && *(s+1) == 'T') {
1899 CHECK_MALLOC_TOO_LATE_FOR('T');
1901 PL_taint_warn = FALSE;
1904 char *popt_copy = NULL;
1917 if (!strchr("CDIMUdmtwW", *s))
1918 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1922 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1923 s = popt_copy + (s - d);
1931 if( !PL_tainting ) {
1932 PL_taint_warn = TRUE;
1943 #ifdef USE_SITECUSTOMIZE
1945 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1946 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1951 scriptname = argv[0];
1954 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1956 else if (scriptname == NULL) {
1958 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1964 /* Set $^X early so that it can be used for relocatable paths in @INC */
1965 assert (!PL_tainted);
1967 S_set_caret_X(aTHX);
1972 bool suidscript = FALSE;
1974 open_script(scriptname, dosearch, &suidscript, &rsfp);
1976 validate_suid(validarg, scriptname, fdscript, suidscript,
1980 # if defined(SIGCHLD) || defined(SIGCLD)
1983 # define SIGCHLD SIGCLD
1985 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1986 if (sigstate == (Sighandler_t) SIG_IGN) {
1987 if (ckWARN(WARN_SIGNAL))
1988 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1989 "Can't ignore signal CHLD, forcing to default");
1990 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
1998 /* This will croak if suidscript is true, as -x cannot be used with
2000 forbid_setid('x', suidscript);
2001 /* Hence you can't get here if suidscript is true */
2003 find_beginning(linestr_sv, rsfp);
2004 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2005 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2009 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2010 CvUNIQUE_on(PL_compcv);
2012 CvPADLIST(PL_compcv) = pad_new(0);
2014 PL_isarev = newHV();
2017 boot_core_UNIVERSAL();
2021 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2023 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2029 # ifdef HAS_SOCKS5_INIT
2030 socks5_init(argv[0]);
2036 init_predump_symbols();
2037 /* init_postdump_symbols not currently designed to be called */
2038 /* more than once (ENV isn't cleared first, for example) */
2039 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2041 init_postdump_symbols(argc,argv,env);
2043 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2044 * or explicitly in some platforms.
2045 * locale.c:Perl_init_i18nl10n() if the environment
2046 * look like the user wants to use UTF-8. */
2047 #if defined(__SYMBIAN32__)
2048 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2051 /* Requires init_predump_symbols(). */
2052 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2057 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2058 * and the default open disciplines. */
2059 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2060 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2062 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2063 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2064 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2066 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2067 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2068 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2070 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2071 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2072 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2074 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2075 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2078 sv_setpvs(sv, ":utf8\0:utf8");
2080 sv_setpvs(sv, ":utf8\0");
2083 sv_setpvs(sv, "\0:utf8");
2091 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2092 if (strEQ(s, "unsafe"))
2093 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2094 else if (strEQ(s, "safe"))
2095 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2097 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2104 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2108 PL_xmlfp = PerlIO_stdout();
2110 PL_xmlfp = PerlIO_open(s, "w");
2112 Perl_croak(aTHX_ "Can't open %s", s);
2114 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2120 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2121 PL_madskills = atoi(s);
2122 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2127 lex_start(linestr_sv, rsfp, TRUE);
2128 PL_subname = newSVpvs("main");
2130 if (add_read_e_script)
2131 filter_add(read_e_script, NULL);
2133 /* now parse the script */
2135 SETERRNO(0,SS_NORMAL);
2136 if (yyparse() || PL_parser->error_count) {
2138 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2140 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2144 CopLINE_set(PL_curcop, 0);
2145 PL_curstash = PL_defstash;
2147 SvREFCNT_dec(PL_e_script);
2155 SAVECOPFILE(PL_curcop);
2156 SAVECOPLINE(PL_curcop);
2157 gv_check(PL_defstash);
2166 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2167 dump_mstats("after compilation:");
2177 =for apidoc perl_run
2179 Tells a Perl interpreter to run. See L<perlembed>.
2192 PERL_ARGS_ASSERT_PERL_RUN;
2193 #ifndef MULTIPLICITY
2194 PERL_UNUSED_ARG(my_perl);
2197 oldscope = PL_scopestack_ix;
2205 cxstack_ix = -1; /* start context stack again */
2207 case 0: /* normal completion */
2211 case 2: /* my_exit() */
2212 while (PL_scopestack_ix > oldscope)
2215 PL_curstash = PL_defstash;
2216 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2217 PL_endav && !PL_minus_c)
2218 call_list(oldscope, PL_endav);
2220 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2221 dump_mstats("after execution: ");
2227 POPSTACK_TO(PL_mainstack);
2230 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2241 S_run_body(pTHX_ I32 oldscope)
2244 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2245 PL_sawampersand ? "Enabling" : "Omitting"));
2247 if (!PL_restartop) {
2251 exit(0); /* less likely to core dump than my_exit(0) */
2255 if (DEBUG_x_TEST || DEBUG_B_TEST)
2256 dump_all_perl(!DEBUG_B_TEST);
2258 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2262 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2265 if (PERLDB_SINGLE && PL_DBsingle)
2266 sv_setiv(PL_DBsingle, 1);
2268 call_list(oldscope, PL_initav);
2269 #ifdef PERL_DEBUG_READONLY_OPS
2270 Perl_pending_Slabs_to_ro(aTHX);
2277 PL_op = PL_restartop;
2281 else if (PL_main_start) {
2282 CvDEPTH(PL_main_cv) = 1;
2283 PL_op = PL_main_start;
2291 =head1 SV Manipulation Functions
2293 =for apidoc p||get_sv
2295 Returns the SV of the specified Perl scalar. C<flags> are passed to
2296 C<gv_fetchpv>. If C<GV_ADD> is set and the
2297 Perl variable does not exist then it will be created. If C<flags> is zero
2298 and the variable does not exist then NULL is returned.
2304 Perl_get_sv(pTHX_ const char *name, I32 flags)
2308 PERL_ARGS_ASSERT_GET_SV;
2310 gv = gv_fetchpv(name, flags, SVt_PV);
2317 =head1 Array Manipulation Functions
2319 =for apidoc p||get_av
2321 Returns the AV of the specified Perl array. C<flags> are passed to
2322 C<gv_fetchpv>. If C<GV_ADD> is set and the
2323 Perl variable does not exist then it will be created. If C<flags> is zero
2324 and the variable does not exist then NULL is returned.
2330 Perl_get_av(pTHX_ const char *name, I32 flags)
2332 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2334 PERL_ARGS_ASSERT_GET_AV;
2344 =head1 Hash Manipulation Functions
2346 =for apidoc p||get_hv
2348 Returns the HV of the specified Perl hash. C<flags> are passed to
2349 C<gv_fetchpv>. If C<GV_ADD> is set and the
2350 Perl variable does not exist then it will be created. If C<flags> is zero
2351 and the variable does not exist then NULL is returned.
2357 Perl_get_hv(pTHX_ const char *name, I32 flags)
2359 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2361 PERL_ARGS_ASSERT_GET_HV;
2371 =head1 CV Manipulation Functions
2373 =for apidoc p||get_cvn_flags
2375 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2376 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2377 exist then it will be declared (which has the same effect as saying
2378 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2379 then NULL is returned.
2381 =for apidoc p||get_cv
2383 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2389 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2391 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2392 /* XXX this is probably not what they think they're getting.
2393 * It has the same effect as "sub name;", i.e. just a forward
2396 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2398 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2399 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2400 return newSUB(start_subparse(FALSE, 0),
2401 newSVOP(OP_CONST, 0, sv),
2409 /* Nothing in core calls this now, but we can't replace it with a macro and
2410 move it to mathoms.c as a macro would evaluate name twice. */
2412 Perl_get_cv(pTHX_ const char *name, I32 flags)
2414 PERL_ARGS_ASSERT_GET_CV;
2416 return get_cvn_flags(name, strlen(name), flags);
2419 /* Be sure to refetch the stack pointer after calling these routines. */
2423 =head1 Callback Functions
2425 =for apidoc p||call_argv
2427 Performs a callback to the specified Perl sub. See L<perlcall>.
2433 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2435 /* See G_* flags in cop.h */
2436 /* null terminated arg list */
2441 PERL_ARGS_ASSERT_CALL_ARGV;
2446 mXPUSHs(newSVpv(*argv,0));
2451 return call_pv(sub_name, flags);
2455 =for apidoc p||call_pv
2457 Performs a callback to the specified Perl sub. See L<perlcall>.
2463 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2464 /* name of the subroutine */
2465 /* See G_* flags in cop.h */
2467 PERL_ARGS_ASSERT_CALL_PV;
2469 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2473 =for apidoc p||call_method
2475 Performs a callback to the specified Perl method. The blessed object must
2476 be on the stack. See L<perlcall>.
2482 Perl_call_method(pTHX_ const char *methname, I32 flags)
2483 /* name of the subroutine */
2484 /* See G_* flags in cop.h */
2487 PERL_ARGS_ASSERT_CALL_METHOD;
2489 len = strlen(methname);
2491 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2492 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2495 /* May be called with any of a CV, a GV, or an SV containing the name. */
2497 =for apidoc p||call_sv
2499 Performs a callback to the Perl sub whose name is in the SV. See
2506 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2507 /* See G_* flags in cop.h */
2510 LOGOP myop; /* fake syntax tree node */
2515 bool oldcatch = CATCH_GET;
2517 OP* const oldop = PL_op;
2520 PERL_ARGS_ASSERT_CALL_SV;
2522 if (flags & G_DISCARD) {
2526 if (!(flags & G_WANT)) {
2527 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2532 Zero(&myop, 1, LOGOP);
2533 myop.op_next = NULL;
2534 if (!(flags & G_NOARGS))
2535 myop.op_flags |= OPf_STACKED;
2536 myop.op_flags |= OP_GIMME_REVERSE(flags);
2540 EXTEND(PL_stack_sp, 1);
2541 *++PL_stack_sp = sv;
2543 oldscope = PL_scopestack_ix;
2545 if (PERLDB_SUB && PL_curstash != PL_debstash
2546 /* Handle first BEGIN of -d. */
2547 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2548 /* Try harder, since this may have been a sighandler, thus
2549 * curstash may be meaningless. */
2550 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2551 && !(flags & G_NODEBUG))
2552 PL_op->op_private |= OPpENTERSUB_DB;
2554 if (flags & G_METHOD) {
2555 Zero(&method_op, 1, UNOP);
2556 method_op.op_next = PL_op;
2557 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2558 method_op.op_type = OP_METHOD;
2559 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2560 myop.op_type = OP_ENTERSUB;
2561 PL_op = (OP*)&method_op;
2564 if (!(flags & G_EVAL)) {
2566 CALL_BODY_SUB((OP*)&myop);
2567 retval = PL_stack_sp - (PL_stack_base + oldmark);
2568 CATCH_SET(oldcatch);
2571 myop.op_other = (OP*)&myop;
2573 create_eval_scope(flags|G_FAKINGEVAL);
2581 CALL_BODY_SUB((OP*)&myop);
2582 retval = PL_stack_sp - (PL_stack_base + oldmark);
2583 if (!(flags & G_KEEPERR)) {
2591 /* my_exit() was called */
2592 PL_curstash = PL_defstash;
2595 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2596 Perl_croak(aTHX_ "Callback called exit");
2601 PL_op = PL_restartop;
2605 PL_stack_sp = PL_stack_base + oldmark;
2606 if ((flags & G_WANT) == G_ARRAY)
2610 *++PL_stack_sp = &PL_sv_undef;
2615 if (PL_scopestack_ix > oldscope)
2616 delete_eval_scope();
2620 if (flags & G_DISCARD) {
2621 PL_stack_sp = PL_stack_base + oldmark;
2630 /* Eval a string. The G_EVAL flag is always assumed. */
2633 =for apidoc p||eval_sv
2635 Tells Perl to C<eval> the string in the SV.
2641 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2643 /* See G_* flags in cop.h */
2647 UNOP myop; /* fake syntax tree node */
2648 VOL I32 oldmark = SP - PL_stack_base;
2651 OP* const oldop = PL_op;
2654 PERL_ARGS_ASSERT_EVAL_SV;
2656 if (flags & G_DISCARD) {
2663 Zero(PL_op, 1, UNOP);
2664 EXTEND(PL_stack_sp, 1);
2665 *++PL_stack_sp = sv;
2667 if (!(flags & G_NOARGS))
2668 myop.op_flags = OPf_STACKED;
2669 myop.op_next = NULL;
2670 myop.op_type = OP_ENTEREVAL;
2671 myop.op_flags |= OP_GIMME_REVERSE(flags);
2672 if (flags & G_KEEPERR)
2673 myop.op_flags |= OPf_SPECIAL;
2675 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2676 * before a PUSHEVAL, which corrupts the stack after a croak */
2677 TAINT_PROPER("eval_sv()");
2683 CALL_BODY_EVAL((OP*)&myop);
2684 retval = PL_stack_sp - (PL_stack_base + oldmark);
2685 if (!(flags & G_KEEPERR)) {
2693 /* my_exit() was called */
2694 PL_curstash = PL_defstash;
2697 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2698 Perl_croak(aTHX_ "Callback called exit");
2703 PL_op = PL_restartop;
2707 PL_stack_sp = PL_stack_base + oldmark;
2708 if ((flags & G_WANT) == G_ARRAY)
2712 *++PL_stack_sp = &PL_sv_undef;
2718 if (flags & G_DISCARD) {
2719 PL_stack_sp = PL_stack_base + oldmark;
2729 =for apidoc p||eval_pv
2731 Tells Perl to C<eval> the given string and return an SV* result.
2737 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2741 SV* sv = newSVpv(p, 0);
2743 PERL_ARGS_ASSERT_EVAL_PV;
2745 eval_sv(sv, G_SCALAR);
2752 if (croak_on_error && SvTRUE(ERRSV)) {
2753 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2759 /* Require a module. */
2762 =head1 Embedding Functions
2764 =for apidoc p||require_pv
2766 Tells Perl to C<require> the file named by the string argument. It is
2767 analogous to the Perl code C<eval "require '$file'">. It's even
2768 implemented that way; consider using load_module instead.
2773 Perl_require_pv(pTHX_ const char *pv)
2779 PERL_ARGS_ASSERT_REQUIRE_PV;
2781 PUSHSTACKi(PERLSI_REQUIRE);
2783 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2784 eval_sv(sv_2mortal(sv), G_DISCARD);
2790 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2792 /* This message really ought to be max 23 lines.
2793 * Removed -h because the user already knows that option. Others? */
2795 static const char * const usage_msg[] = {
2796 "-0[octal] specify record separator (\\0, if no argument)",
2797 "-a autosplit mode with -n or -p (splits $_ into @F)",
2798 "-C[number/list] enables the listed Unicode features",
2799 "-c check syntax only (runs BEGIN and CHECK blocks)",
2800 "-d[:debugger] run program under debugger",
2801 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2802 "-e program one line of program (several -e's allowed, omit programfile)",
2803 "-E program like -e, but enables all optional features",
2804 "-f don't do $sitelib/sitecustomize.pl at startup",
2805 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2806 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2807 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2808 "-l[octal] enable line ending processing, specifies line terminator",
2809 "-[mM][-]module execute \"use/no module...\" before executing program",
2810 "-n assume \"while (<>) { ... }\" loop around program",
2811 "-p assume loop like -n but print line also, like sed",
2812 "-s enable rudimentary parsing for switches after programfile",
2813 "-S look for programfile using PATH environment variable",
2814 "-t enable tainting warnings",
2815 "-T enable tainting checks",
2816 "-u dump core after parsing program",
2817 "-U allow unsafe operations",
2818 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2819 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2820 "-w enable many useful warnings (RECOMMENDED)",
2821 "-W enable all warnings",
2822 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2823 "-X disable all warnings",
2827 const char * const *p = usage_msg;
2829 PERL_ARGS_ASSERT_USAGE;
2831 PerlIO_printf(PerlIO_stdout(),
2832 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2835 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2838 /* convert a string of -D options (or digits) into an int.
2839 * sets *s to point to the char after the options */
2843 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2845 static const char * const usage_msgd[] = {
2846 " Debugging flag values: (see also -d)",
2847 " p Tokenizing and parsing (with v, displays parse stack)",
2848 " s Stack snapshots (with v, displays all stacks)",
2849 " l Context (loop) stack processing",
2850 " t Trace execution",
2851 " o Method and overloading resolution",
2852 " c String/numeric conversions",
2853 " P Print profiling info, source file input state",
2854 " m Memory and SV allocation",
2855 " f Format processing",
2856 " r Regular expression parsing and execution",
2857 " x Syntax tree dump",
2858 " u Tainting checks",
2859 " H Hash dump -- usurps values()",
2860 " X Scratchpad allocation",
2863 " R Include reference counts of dumped variables (eg when using -Ds)",
2864 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2865 " v Verbose: use in conjunction with other flags",
2867 " A Consistency checks on internal structures",
2868 " q quiet - currently only suppresses the 'EXECUTING' message",
2869 " M trace smart match resolution",
2870 " B dump suBroutine definitions, including special Blocks like BEGIN",
2875 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2878 /* if adding extra options, remember to update DEBUG_MASK */
2879 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2881 for (; isALNUM(**s); (*s)++) {
2882 const char * const d = strchr(debopts,**s);
2884 i |= 1 << (d - debopts);
2885 else if (ckWARN_d(WARN_DEBUGGING))
2886 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2887 "invalid option -D%c, use -D'' to see choices\n", **s);
2890 else if (isDIGIT(**s)) {
2892 for (; isALNUM(**s); (*s)++) ;
2894 else if (givehelp) {
2895 const char *const *p = usage_msgd;
2896 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2899 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2900 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2901 "-Dp not implemented on this platform\n");
2907 /* This routine handles any switches that can be given during run */
2910 Perl_moreswitches(pTHX_ const char *s)
2914 const char option = *s; /* used to remember option in -m/-M code */
2916 PERL_ARGS_ASSERT_MORESWITCHES;
2924 SvREFCNT_dec(PL_rs);
2925 if (s[1] == 'x' && s[2]) {
2926 const char *e = s+=2;
2932 flags = PERL_SCAN_SILENT_ILLDIGIT;
2933 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2934 if (s + numlen < e) {
2935 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2939 PL_rs = newSVpvs("");
2940 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2941 tmps = (U8*)SvPVX(PL_rs);
2942 uvchr_to_utf8(tmps, rschar);
2943 SvCUR_set(PL_rs, UNISKIP(rschar));
2948 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2949 if (rschar & ~((U8)~0))
2950 PL_rs = &PL_sv_undef;
2951 else if (!rschar && numlen >= 2)
2952 PL_rs = newSVpvs("");
2954 char ch = (char)rschar;
2955 PL_rs = newSVpvn(&ch, 1);
2958 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2963 PL_unicode = parse_unicode_opts( (const char **)&s );
2964 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2970 while (*s && !isSPACE(*s)) ++s;
2971 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2982 forbid_setid('d', FALSE);
2985 /* -dt indicates to the debugger that threads will be used */
2986 if (*s == 't' && !isALNUM(s[1])) {
2988 my_setenv("PERL5DB_THREADED", "1");
2991 /* The following permits -d:Mod to accepts arguments following an =
2992 in the fashion that -MSome::Mod does. */
2993 if (*s == ':' || *s == '=') {
2994 const char *start = ++s;
2995 const char *const end = s + strlen(s);
2996 SV * const sv = newSVpvs("use Devel::");
2998 /* We now allow -d:Module=Foo,Bar */
2999 while(isALNUM(*s) || *s==':') ++s;
3001 sv_catpvn(sv, start, end - start);
3003 sv_catpvn(sv, start, s-start);
3004 /* Don't use NUL as q// delimiter here, this string goes in the
3006 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3009 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3013 PL_perldb = PERLDB_ALL;
3020 forbid_setid('D', FALSE);
3022 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3023 #else /* !DEBUGGING */
3024 if (ckWARN_d(WARN_DEBUGGING))
3025 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3026 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3027 for (s++; isALNUM(*s); s++) ;
3032 usage(PL_origargv[0]);
3035 Safefree(PL_inplace);
3036 #if defined(__CYGWIN__) /* do backup extension automagically */
3037 if (*(s+1) == '\0') {
3038 PL_inplace = savepvs(".bak");
3041 #endif /* __CYGWIN__ */
3043 const char * const start = ++s;
3044 while (*s && !isSPACE(*s))
3047 PL_inplace = savepvn(start, s - start);
3051 if (*s == '-') /* Additional switches on #! line. */
3055 case 'I': /* -I handled both here and in parse_body() */
3056 forbid_setid('I', FALSE);
3058 while (*s && isSPACE(*s))
3063 /* ignore trailing spaces (possibly followed by other switches) */
3065 for (e = p; *e && !isSPACE(*e); e++) ;
3069 } while (*p && *p != '-');
3071 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3077 Perl_croak(aTHX_ "No directory specified for -I");
3083 SvREFCNT_dec(PL_ors_sv);
3089 PL_ors_sv = newSVpvs("\n");
3090 numlen = 3 + (*s == '0');
3091 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3095 if (RsPARA(PL_rs)) {
3096 PL_ors_sv = newSVpvs("\n\n");
3099 PL_ors_sv = newSVsv(PL_rs);
3104 forbid_setid('M', FALSE); /* XXX ? */
3107 forbid_setid('m', FALSE); /* XXX ? */
3112 const char *use = "use ";
3114 /* -M-foo == 'no foo' */
3115 /* Leading space on " no " is deliberate, to make both
3116 possibilities the same length. */
3117 if (*s == '-') { use = " no "; ++s; }
3118 sv = newSVpvn(use,4);
3120 /* We allow -M'Module qw(Foo Bar)' */
3121 while(isALNUM(*s) || *s==':') {
3130 Perl_croak(aTHX_ "Module name required with -%c option",
3133 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3134 "contains single ':'",
3135 (int)(s - start), start, option);
3136 end = s + strlen(s);
3138 sv_catpvn(sv, start, end - start);
3139 if (option == 'm') {
3141 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3142 sv_catpvs( sv, " ()");
3145 sv_catpvn(sv, start, s-start);
3146 /* Use NUL as q''-delimiter. */
3147 sv_catpvs(sv, " split(/,/,q\0");
3149 sv_catpvn(sv, s, end - s);
3150 sv_catpvs(sv, "\0)");
3153 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3156 Perl_croak(aTHX_ "Missing argument to -%c", option);
3167 forbid_setid('s', FALSE);
3168 PL_doswitches = TRUE;
3182 PL_do_undump = TRUE;
3190 if (!sv_derived_from(PL_patchlevel, "version"))
3191 upg_version(PL_patchlevel, TRUE);
3194 SV* level= vstringify(PL_patchlevel);
3195 #ifdef PERL_PATCHNUM
3196 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3197 SV *num = newSVpvs(PERL_PATCHNUM "*");
3199 SV *num = newSVpvs(PERL_PATCHNUM);
3202 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3203 SvREFCNT_dec(level);
3206 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3210 PerlIO_printf(PerlIO_stdout(),
3211 "\nThis is perl, %"SVf
3215 SvREFCNT_dec(level);
3218 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3219 PerlIO_printf(PerlIO_stdout(),
3220 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3221 SVfARG(vstringify(PL_patchlevel))));
3222 PerlIO_printf(PerlIO_stdout(),
3223 Perl_form(aTHX_ " built under %s at %s %s\n",
3224 OSNAME, __DATE__, __TIME__));
3225 PerlIO_printf(PerlIO_stdout(),
3226 Perl_form(aTHX_ " OS Specific Release: %s\n",
3229 #if defined(LOCAL_PATCH_COUNT)
3230 if (LOCAL_PATCH_COUNT > 0)
3231 PerlIO_printf(PerlIO_stdout(),
3232 "\n(with %d registered patch%s, "
3233 "see perl -V for more detail)",
3235 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3238 PerlIO_printf(PerlIO_stdout(),
3239 "\n\nCopyright 1987-2009, Larry Wall\n");
3241 PerlIO_printf(PerlIO_stdout(),
3242 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3245 PerlIO_printf(PerlIO_stdout(),
3246 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3247 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3250 PerlIO_printf(PerlIO_stdout(),
3251 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3252 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "atariST series port, ++jrb bammi@cadence.com\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "EPOC port by Olaf Flebbe, 1999-2002\n");
3287 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3288 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3291 #ifdef __SYMBIAN32__
3292 PerlIO_printf(PerlIO_stdout(),
3293 "Symbian port by Nokia, 2004-2005\n");
3295 #ifdef BINARY_BUILD_NOTICE
3296 BINARY_BUILD_NOTICE;
3298 PerlIO_printf(PerlIO_stdout(),
3300 Perl may be copied only under the terms of either the Artistic License or the\n\
3301 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3302 Complete documentation for Perl, including FAQ lists, should be found on\n\
3303 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3304 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3307 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3308 PL_dowarn |= G_WARN_ON;
3313 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3314 if (!specialWARN(PL_compiling.cop_warnings))
3315 PerlMemShared_free(PL_compiling.cop_warnings);
3316 PL_compiling.cop_warnings = pWARN_ALL ;
3320 PL_dowarn = G_WARN_ALL_OFF;
3321 if (!specialWARN(PL_compiling.cop_warnings))
3322 PerlMemShared_free(PL_compiling.cop_warnings);
3323 PL_compiling.cop_warnings = pWARN_NONE ;
3330 if (s[0] == '-') /* Additional switches on #! line. */
3335 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3341 #ifdef ALTERNATE_SHEBANG
3342 case 'S': /* OS/2 needs -S on "extproc" line. */
3346 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3351 /* compliments of Tom Christiansen */
3353 /* unexec() can be found in the Gnu emacs distribution */
3354 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3357 Perl_my_unexec(pTHX)
3359 PERL_UNUSED_CONTEXT;
3361 SV * prog = newSVpv(BIN_EXP, 0);
3362 SV * file = newSVpv(PL_origfilename, 0);
3366 sv_catpvs(prog, "/perl");
3367 sv_catpvs(file, ".perldump");
3369 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3370 /* unexec prints msg to stderr in case of failure */
3371 PerlProc_exit(status);
3374 # include <lib$routines.h>
3375 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3376 # elif defined(WIN32) || defined(__CYGWIN__)
3377 Perl_croak(aTHX_ "dump is not supported");
3379 ABORT(); /* for use with undump */
3384 /* initialize curinterp */
3390 # define PERLVAR(var,type)
3391 # define PERLVARA(var,n,type)
3392 # if defined(PERL_IMPLICIT_CONTEXT)
3393 # define PERLVARI(var,type,init) aTHX->var = init;
3394 # define PERLVARIC(var,type,init) aTHX->var = init;
3396 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3397 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3399 # include "intrpvar.h"
3405 # define PERLVAR(var,type)
3406 # define PERLVARA(var,n,type)
3407 # define PERLVARI(var,type,init) PL_##var = init;
3408 # define PERLVARIC(var,type,init) PL_##var = init;
3409 # include "intrpvar.h"
3416 /* As these are inside a structure, PERLVARI isn't capable of initialising
3418 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3419 PL_reg_poscache = PL_reg_starttry = NULL;
3423 S_init_main_stash(pTHX)
3428 PL_curstash = PL_defstash = newHV();
3429 /* We know that the string "main" will be in the global shared string
3430 table, so it's a small saving to use it rather than allocate another
3432 PL_curstname = newSVpvs_share("main");
3433 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3434 /* If we hadn't caused another reference to "main" to be in the shared
3435 string table above, then it would be worth reordering these two,
3436 because otherwise all we do is delete "main" from it as a consequence
3437 of the SvREFCNT_dec, only to add it again with hv_name_set */
3438 SvREFCNT_dec(GvHV(gv));
3439 hv_name_set(PL_defstash, "main", 4, 0);
3440 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3442 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3444 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3445 GvMULTI_on(PL_incgv);
3446 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3447 GvMULTI_on(PL_hintgv);
3448 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3449 SvREFCNT_inc_simple_void(PL_defgv);
3450 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3451 SvREFCNT_inc_simple_void(PL_errgv);
3452 GvMULTI_on(PL_errgv);
3453 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3454 GvMULTI_on(PL_replgv);
3455 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3456 #ifdef PERL_DONT_CREATE_GVSV
3459 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3461 PL_curstash = PL_defstash;
3462 CopSTASH_set(&PL_compiling, PL_defstash);
3463 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3464 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3466 /* We must init $/ before switches are processed. */
3467 sv_setpvs(get_sv("/", GV_ADD), "\n");
3471 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3472 bool *suidscript, PerlIO **rsfpp)
3477 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3480 PL_origfilename = savepvs("-e");
3483 /* if find_script() returns, it returns a malloc()-ed value */
3484 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3486 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3487 const char *s = scriptname + 8;
3493 * Tell apart "normal" usage of fdscript, e.g.
3494 * with bash on FreeBSD:
3495 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3496 * from usage in suidperl.
3497 * Does any "normal" usage leave garbage after the number???
3498 * Is it a mistake to use a similar /dev/fd/ construct for
3503 * Be supersafe and do some sanity-checks.
3504 * Still, can we be sure we got the right thing?
3507 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3510 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3512 scriptname = savepv(s + 1);
3513 Safefree(PL_origfilename);
3514 PL_origfilename = (char *)scriptname;
3519 CopFILE_free(PL_curcop);
3520 CopFILE_set(PL_curcop, PL_origfilename);
3521 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3522 scriptname = (char *)"";
3523 if (fdscript >= 0) {
3524 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3525 # if defined(HAS_FCNTL) && defined(F_SETFD)
3527 /* ensure close-on-exec */
3528 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3531 else if (!*scriptname) {
3532 forbid_setid(0, *suidscript);
3533 *rsfpp = PerlIO_stdin();
3536 #ifdef FAKE_BIT_BUCKET
3537 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3538 * is called) and still have the "-e" work. (Believe it or not,
3539 * a /dev/null is required for the "-e" to work because source
3540 * filter magic is used to implement it. ) This is *not* a general
3541 * replacement for a /dev/null. What we do here is create a temp
3542 * file (an empty file), open up that as the script, and then
3543 * immediately close and unlink it. Close enough for jazz. */
3544 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3545 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3546 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3547 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3548 FAKE_BIT_BUCKET_TEMPLATE
3550 const char * const err = "Failed to create a fake bit bucket";
3551 if (strEQ(scriptname, BIT_BUCKET)) {
3552 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3553 int tmpfd = mkstemp(tmpname);
3555 scriptname = tmpname;
3558 Perl_croak(aTHX_ err);
3561 scriptname = mktemp(tmpname);
3563 Perl_croak(aTHX_ err);
3568 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3569 #ifdef FAKE_BIT_BUCKET
3570 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3571 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3572 && strlen(scriptname) == sizeof(tmpname) - 1) {
3575 scriptname = BIT_BUCKET;
3577 # if defined(HAS_FCNTL) && defined(F_SETFD)
3579 /* ensure close-on-exec */
3580 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3584 /* PSz 16 Sep 03 Keep neat error message */
3586 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3588 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3589 CopFILE(PL_curcop), Strerror(errno));
3595 * I_SYSSTATVFS HAS_FSTATVFS
3597 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3598 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3599 * here so that metaconfig picks them up. */
3602 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3603 /* Don't even need this function. */
3606 S_validate_suid(pTHX_ PerlIO *rsfp)
3608 PERL_ARGS_ASSERT_VALIDATE_SUID;
3610 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3613 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3614 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3616 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3619 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3620 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3621 /* not set-id, must be wrapped */
3624 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3627 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3631 register const char *s2;
3633 PERL_ARGS_ASSERT_FIND_BEGINNING;
3635 /* skip forward in input to the real script? */
3637 while (PL_doextract) {
3638 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3639 Perl_croak(aTHX_ "No Perl script found in input\n");
3641 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3642 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3643 PL_doextract = FALSE;
3644 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3646 while (*s == ' ' || *s == '\t') s++;
3648 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3649 || s2[-1] == '_') s2--;
3650 if (strnEQ(s2-4,"perl",4))
3651 while ((s = moreswitches(s)))
3663 PL_uid = PerlProc_getuid();
3664 PL_euid = PerlProc_geteuid();
3665 PL_gid = PerlProc_getgid();
3666 PL_egid = PerlProc_getegid();
3668 PL_uid |= PL_gid << 16;
3669 PL_euid |= PL_egid << 16;
3671 /* Should not happen: */
3672 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3673 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3676 * Should go by suidscript, not uid!=euid: why disallow
3677 * system("ls") in scripts run from setuid things?
3678 * Or, is this run before we check arguments and set suidscript?
3679 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3680 * (We never have suidscript, can we be sure to have fdscript?)
3681 * Or must then go by UID checks? See comments in forbid_setid also.
3685 /* This is used very early in the lifetime of the program,
3686 * before even the options are parsed, so PL_tainting has
3687 * not been initialized properly. */
3689 Perl_doing_taint(int argc, char *argv[], char *envp[])
3691 #ifndef PERL_IMPLICIT_SYS
3692 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3693 * before we have an interpreter-- and the whole point of this
3694 * function is to be called at such an early stage. If you are on
3695 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3696 * "tainted because running with altered effective ids', you'll
3697 * have to add your own checks somewhere in here. The two most
3698 * known samples of 'implicitness' are Win32 and NetWare, neither
3699 * of which has much of concept of 'uids'. */
3700 int uid = PerlProc_getuid();
3701 int euid = PerlProc_geteuid();
3702 int gid = PerlProc_getgid();
3703 int egid = PerlProc_getegid();
3710 if (uid && (euid != uid || egid != gid))
3712 #endif /* !PERL_IMPLICIT_SYS */
3713 /* This is a really primitive check; environment gets ignored only
3714 * if -T are the first chars together; otherwise one gets
3715 * "Too late" message. */
3716 if ( argc > 1 && argv[1][0] == '-'
3717 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3722 /* Passing the flag as a single char rather than a string is a slight space
3723 optimisation. The only message that isn't /^-.$/ is
3724 "program input from stdin", which is substituted in place of '\0', which
3725 could never be a command line flag. */
3727 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3730 char string[3] = "-x";
3731 const char *message = "program input from stdin";
3738 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3739 if (PL_euid != PL_uid)
3740 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3741 if (PL_egid != PL_gid)
3742 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3743 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3745 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3749 Perl_init_debugger(pTHX)
3752 HV * const ostash = PL_curstash;
3754 PL_curstash = PL_debstash;
3755 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3757 AvREAL_off(PL_dbargs);
3758 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3759 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3760 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3761 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3762 sv_setiv(PL_DBsingle, 0);
3763 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3764 sv_setiv(PL_DBtrace, 0);
3765 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3766 sv_setiv(PL_DBsignal, 0);
3767 PL_curstash = ostash;
3770 #ifndef STRESS_REALLOC
3771 #define REASONABLE(size) (size)
3773 #define REASONABLE(size) (1) /* unreasonable */
3777 Perl_init_stacks(pTHX)
3780 /* start with 128-item stack and 8K cxstack */
3781 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3782 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3783 PL_curstackinfo->si_type = PERLSI_MAIN;
3784 PL_curstack = PL_curstackinfo->si_stack;
3785 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3787 PL_stack_base = AvARRAY(PL_curstack);
3788 PL_stack_sp = PL_stack_base;
3789 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3791 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3794 PL_tmps_max = REASONABLE(128);
3796 Newx(PL_markstack,REASONABLE(32),I32);
3797 PL_markstack_ptr = PL_markstack;
3798 PL_markstack_max = PL_markstack + REASONABLE(32);
3802 Newx(PL_scopestack,REASONABLE(32),I32);
3803 PL_scopestack_ix = 0;
3804 PL_scopestack_max = REASONABLE(32);
3806 Newx(PL_savestack,REASONABLE(128),ANY);
3807 PL_savestack_ix = 0;
3808 PL_savestack_max = REASONABLE(128);
3817 while (PL_curstackinfo->si_next)
3818 PL_curstackinfo = PL_curstackinfo->si_next;
3819 while (PL_curstackinfo) {
3820 PERL_SI *p = PL_curstackinfo->si_prev;
3821 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3822 Safefree(PL_curstackinfo->si_cxstack);
3823 Safefree(PL_curstackinfo);
3824 PL_curstackinfo = p;
3826 Safefree(PL_tmps_stack);
3827 Safefree(PL_markstack);
3828 Safefree(PL_scopestack);
3829 Safefree(PL_savestack);
3834 S_init_predump_symbols(pTHX)
3840 sv_setpvs(get_sv("\"", GV_ADD), " ");
3841 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3843 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3844 GvMULTI_on(PL_stdingv);
3845 io = GvIOp(PL_stdingv);
3846 IoTYPE(io) = IoTYPE_RDONLY;
3847 IoIFP(io) = PerlIO_stdin();
3848 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3850 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3852 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3855 IoTYPE(io) = IoTYPE_WRONLY;
3856 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3858 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3860 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3862 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3863 GvMULTI_on(PL_stderrgv);
3864 io = GvIOp(PL_stderrgv);
3865 IoTYPE(io) = IoTYPE_WRONLY;
3866 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3867 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3869 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3871 PL_statname = newSV(0); /* last filename we did stat on */
3873 Safefree(PL_osname);
3874 PL_osname = savepv(OSNAME);
3878 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3882 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3884 argc--,argv++; /* skip name of script */
3885 if (PL_doswitches) {
3886 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3890 if (argv[0][1] == '-' && !argv[0][2]) {
3894 if ((s = strchr(argv[0], '='))) {
3895 const char *const start_name = argv[0] + 1;
3896 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3897 TRUE, SVt_PV)), s + 1);
3900 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3903 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3904 GvMULTI_on(PL_argvgv);
3905 (void)gv_AVadd(PL_argvgv);
3906 av_clear(GvAVn(PL_argvgv));
3907 for (; argc > 0; argc--,argv++) {
3908 SV * const sv = newSVpv(argv[0],0);
3909 av_push(GvAVn(PL_argvgv),sv);
3910 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3911 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3914 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3915 (void)sv_utf8_decode(sv);
3921 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3926 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3928 PL_toptarget = newSV_type(SVt_PVFM);
3929 sv_setpvs(PL_toptarget, "");
3930 PL_bodytarget = newSV_type(SVt_PVFM);
3931 sv_setpvs(PL_bodytarget, "");
3932 PL_formtarget = PL_bodytarget;
3936 init_argv_symbols(argc,argv);
3938 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3939 sv_setpv(GvSV(tmpgv),PL_origfilename);
3941 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3943 bool env_is_not_environ;
3944 GvMULTI_on(PL_envgv);
3945 hv = GvHVn(PL_envgv);
3946 hv_magic(hv, NULL, PERL_MAGIC_env);
3948 #ifdef USE_ENVIRON_ARRAY
3949 /* Note that if the supplied env parameter is actually a copy
3950 of the global environ then it may now point to free'd memory
3951 if the environment has been modified since. To avoid this
3952 problem we treat env==NULL as meaning 'use the default'
3956 env_is_not_environ = env != environ;
3957 if (env_is_not_environ
3958 # ifdef USE_ITHREADS
3959 && PL_curinterp == aTHX
3968 for (; *env; env++) {
3971 if (!(s = strchr(old_var,'=')) || s == old_var)
3974 #if defined(MSDOS) && !defined(DJGPP)
3976 (void)strupr(old_var);
3979 sv = newSVpv(s+1, 0);
3980 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3981 if (env_is_not_environ)
3985 #endif /* USE_ENVIRON_ARRAY */
3986 #endif /* !PERL_MICRO */
3989 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3990 SvREADONLY_off(GvSV(tmpgv));
3991 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
3992 SvREADONLY_on(GvSV(tmpgv));
3994 #ifdef THREADS_HAVE_PIDS
3995 PL_ppid = (IV)getppid();
3998 /* touch @F array to prevent spurious warnings 20020415 MJD */
4000 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4005 S_init_perllib(pTHX)
4009 const char *perl5lib = NULL;
4018 perl5lib = PerlEnv_getenv("PERL5LIB");
4020 * It isn't possible to delete an environment variable with
4021 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4022 * case we treat PERL5LIB as undefined if it has a zero-length value.
4024 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4025 if (perl5lib && *perl5lib != '\0')
4029 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4031 s = PerlEnv_getenv("PERLLIB");
4033 incpush_use_sep(s, 0, 0);
4036 /* Treat PERL5?LIB as a possible search list logical name -- the
4037 * "natural" VMS idiom for a Unix path string. We allow each
4038 * element to be a set of |-separated directories for compatibility.
4042 if (my_trnlnm("PERL5LIB",buf,0))
4044 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4045 } while (my_trnlnm("PERL5LIB",buf,++idx));
4047 while (my_trnlnm("PERLLIB",buf,idx++))
4048 incpush_use_sep(buf, 0, 0);
4053 /* Use the ~-expanded versions of APPLLIB (undocumented),
4054 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4057 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4058 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4062 /* sitearch is always relative to sitelib on Windows for
4063 * DLL-based path intuition to work correctly */
4064 # if !defined(WIN32)
4065 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4066 INCPUSH_CAN_RELOCATE);
4072 /* this picks up sitearch as well */
4073 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4075 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4077 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4081 #ifdef PERL_VENDORARCH_EXP
4082 /* vendorarch is always relative to vendorlib on Windows for
4083 * DLL-based path intuition to work correctly */
4084 # if !defined(WIN32)
4085 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4086 INCPUSH_CAN_RELOCATE);
4090 #ifdef PERL_VENDORLIB_EXP
4092 /* this picks up vendorarch as well */
4093 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4095 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4097 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4098 INCPUSH_CAN_RELOCATE);
4103 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4107 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4111 s = win32_get_privlib(PERL_FS_VERSION, &len);
4113 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4116 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4118 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4122 #ifdef PERL_OTHERLIBDIRS
4123 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4124 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4125 |INCPUSH_CAN_RELOCATE);
4131 * It isn't possible to delete an environment variable with
4132 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4133 * case we treat PERL5LIB as undefined if it has a zero-length value.
4135 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4136 if (perl5lib && *perl5lib != '\0')
4140 incpush_use_sep(perl5lib, 0,
4141 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4143 /* Treat PERL5?LIB as a possible search list logical name -- the
4144 * "natural" VMS idiom for a Unix path string. We allow each
4145 * element to be a set of |-separated directories for compatibility.
4149 if (my_trnlnm("PERL5LIB",buf,0))
4151 incpush_use_sep(buf, 0,
4152 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4153 } while (my_trnlnm("PERL5LIB",buf,++idx));
4157 /* Use the ~-expanded versions of APPLLIB (undocumented),
4158 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4161 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4162 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4165 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4166 /* Search for version-specific dirs below here */
4167 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4168 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4172 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4173 /* Search for version-specific dirs below here */
4174 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4175 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4178 #ifdef PERL_OTHERLIBDIRS
4179 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4180 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4181 |INCPUSH_CAN_RELOCATE);
4185 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4188 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4189 # define PERLLIB_SEP ';'
4192 # define PERLLIB_SEP '|'
4194 # define PERLLIB_SEP ':'
4197 #ifndef PERLLIB_MANGLE
4198 # define PERLLIB_MANGLE(s,n) (s)
4201 /* Push a directory onto @INC if it exists.
4202 Generate a new SV if we do this, to save needing to copy the SV we push
4205 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4210 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4212 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4213 S_ISDIR(tmpstatbuf.st_mode)) {
4215 dir = newSVsv(stem);
4217 /* Truncate dir back to stem. */
4218 SvCUR_set(dir, SvCUR(stem));
4224 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4227 const U8 using_sub_dirs
4228 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4229 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4230 const U8 add_versioned_sub_dirs
4231 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4232 const U8 add_archonly_sub_dirs
4233 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4234 #ifdef PERL_INC_VERSION_LIST
4235 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4237 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4238 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4239 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4240 AV *const inc = GvAVn(PL_incgv);
4242 PERL_ARGS_ASSERT_INCPUSH;
4245 /* Could remove this vestigial extra block, if we don't mind a lot of
4246 re-indenting diff noise. */
4249 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4250 arranged to unshift #! line -I onto the front of @INC. However,
4251 -I can add version and architecture specific libraries, and they
4252 need to go first. The old code assumed that it was always
4253 pushing. Hence to make it work, need to push the architecture
4254 (etc) libraries onto a temporary array, then "unshift" that onto
4255 the front of @INC. */
4256 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4259 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4260 defined to so something (in os2/os2.c), but the code has been
4261 this way, ignoring any possible changed of length, since
4262 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4264 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4266 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4269 /* Do the if() outside the #ifdef to avoid warnings about an unused
4272 #ifdef PERL_RELOCATABLE_INC
4274 * Relocatable include entries are marked with a leading .../
4277 * 0: Remove that leading ".../"
4278 * 1: Remove trailing executable name (anything after the last '/')
4279 * from the perl path to give a perl prefix
4281 * While the @INC element starts "../" and the prefix ends with a real
4282 * directory (ie not . or ..) chop that real directory off the prefix
4283 * and the leading "../" from the @INC element. ie a logical "../"
4285 * Finally concatenate the prefix and the remainder of the @INC element
4286 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4287 * generates /usr/local/lib/perl5
4289 const char *libpath = SvPVX(libdir);
4290 STRLEN libpath_len = SvCUR(libdir);
4291 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4293 SV * const caret_X = get_sv("\030", 0);
4294 /* Going to use the SV just as a scratch buffer holding a C
4300 /* $^X is *the* source of taint if tainting is on, hence
4301 SvPOK() won't be true. */
4303 assert(SvPOKp(caret_X));
4304 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4306 /* Firstly take off the leading .../
4307 If all else fail we'll do the paths relative to the current
4309 sv_chop(libdir, libpath + 4);
4310 /* Don't use SvPV as we're intentionally bypassing taining,
4311 mortal copies that the mg_get of tainting creates, and
4312 corruption that seems to come via the save stack.
4313 I guess that the save stack isn't correctly set up yet. */
4314 libpath = SvPVX(libdir);
4315 libpath_len = SvCUR(libdir);
4317 /* This would work more efficiently with memrchr, but as it's
4318 only a GNU extension we'd need to probe for it and
4319 implement our own. Not hard, but maybe not worth it? */
4321 prefix = SvPVX(prefix_sv);
4322 lastslash = strrchr(prefix, '/');
4324 /* First time in with the *lastslash = '\0' we just wipe off
4325 the trailing /perl from (say) /usr/foo/bin/perl
4329 while ((*lastslash = '\0'), /* Do that, come what may. */
4330 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4331 && (lastslash = strrchr(prefix, '/')))) {
4332 if (lastslash[1] == '\0'
4333 || (lastslash[1] == '.'
4334 && (lastslash[2] == '/' /* ends "/." */
4335 || (lastslash[2] == '/'
4336 && lastslash[3] == '/' /* or "/.." */
4338 /* Prefix ends "/" or "/." or "/..", any of which
4339 are fishy, so don't do any more logical cleanup.
4343 /* Remove leading "../" from path */
4346 /* Next iteration round the loop removes the last
4347 directory name from prefix by writing a '\0' in
4348 the while clause. */
4350 /* prefix has been terminated with a '\0' to the correct
4351 length. libpath points somewhere into the libdir SV.
4352 We need to join the 2 with '/' and drop the result into
4354 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4355 SvREFCNT_dec(libdir);
4356 /* And this is the new libdir. */
4359 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4360 /* Need to taint reloccated paths if running set ID */
4361 SvTAINTED_on(libdir);
4364 SvREFCNT_dec(prefix_sv);
4369 * BEFORE pushing libdir onto @INC we may first push version- and
4370 * archname-specific sub-directories.
4372 if (using_sub_dirs) {
4374 #ifdef PERL_INC_VERSION_LIST
4375 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4376 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4377 const char * const *incver;
4384 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4386 while (unix[len-1] == '/') len--; /* Cosmetic */
4387 sv_usepvn(libdir,unix,len);
4390 PerlIO_printf(Perl_error_log,
4391 "Failed to unixify @INC element \"%s\"\n",
4395 subdir = newSVsv(libdir);
4397 if (add_versioned_sub_dirs) {
4398 /* .../version/archname if -d .../version/archname */
4399 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4400 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4402 /* .../version if -d .../version */
4403 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4404 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4407 #ifdef PERL_INC_VERSION_LIST
4409 for (incver = incverlist; *incver; incver++) {
4410 /* .../xxx if -d .../xxx */
4411 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4412 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4417 if (add_archonly_sub_dirs) {
4418 /* .../archname if -d .../archname */
4419 sv_catpvs(subdir, "/" ARCHNAME);
4420 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4424 assert (SvREFCNT(subdir) == 1);
4425 SvREFCNT_dec(subdir);
4428 /* finally add this lib directory at the end of @INC */
4430 U32 extra = av_len(av) + 1;
4431 av_unshift(inc, extra + push_basedir);
4433 av_store(inc, extra, libdir);
4435 /* av owns a reference, av_store() expects to be donated a
4436 reference, and av expects to be sane when it's cleared.
4437 If I wanted to be naughty and wrong, I could peek inside the
4438 implementation of av_clear(), realise that it uses
4439 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4440 and so directly steal from it (with a memcpy() to inc, and
4441 then memset() to NULL them out. But people copy code from the
4442 core expecting it to be best practise, so let's use the API.
4443 Although studious readers will note that I'm not checking any
4445 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4449 else if (push_basedir) {
4450 av_push(inc, libdir);
4453 if (!push_basedir) {
4454 assert (SvREFCNT(libdir) == 1);
4455 SvREFCNT_dec(libdir);
4461 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4465 /* This logic has been broken out from S_incpush(). It may be possible to
4468 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4475 /* Break at all separators */
4476 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4478 /* skip any consecutive separators */
4480 /* Uncomment the next line for PATH semantics */
4481 /* But you'll need to write tests */
4482 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4484 incpush(p, (STRLEN)(s - p), flags);
4489 incpush(p, (STRLEN)(end - p), flags);
4494 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4498 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4504 PERL_ARGS_ASSERT_CALL_LIST;
4506 while (av_len(paramList) >= 0) {
4507 cv = MUTABLE_CV(av_shift(paramList));
4509 if (paramList == PL_beginav) {
4510 /* save PL_beginav for compiler */
4511 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4513 else if (paramList == PL_checkav) {
4514 /* save PL_checkav for compiler */
4515 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4517 else if (paramList == PL_unitcheckav) {
4518 /* save PL_unitcheckav for compiler */
4519 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4530 PL_madskills |= 16384;
4535 PL_madskills &= ~16384;
4538 (void)SvPV_const(atsv, len);
4540 PL_curcop = &PL_compiling;
4541 CopLINE_set(PL_curcop, oldline);
4542 if (paramList == PL_beginav)
4543 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4545 Perl_sv_catpvf(aTHX_ atsv,
4546 "%s failed--call queue aborted",
4547 paramList == PL_checkav ? "CHECK"
4548 : paramList == PL_initav ? "INIT"
4549 : paramList == PL_unitcheckav ? "UNITCHECK"
4551 while (PL_scopestack_ix > oldscope)
4554 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4561 /* my_exit() was called */
4562 while (PL_scopestack_ix > oldscope)
4565 PL_curstash = PL_defstash;
4566 PL_curcop = &PL_compiling;
4567 CopLINE_set(PL_curcop, oldline);
4569 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4570 if (paramList == PL_beginav)
4571 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4573 Perl_croak(aTHX_ "%s failed--call queue aborted",
4574 paramList == PL_checkav ? "CHECK"
4575 : paramList == PL_initav ? "INIT"
4576 : paramList == PL_unitcheckav ? "UNITCHECK"
4583 PL_curcop = &PL_compiling;
4584 CopLINE_set(PL_curcop, oldline);
4587 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4596 Perl_my_exit(pTHX_ U32 status)
4607 STATUS_EXIT_SET(status);
4614 Perl_my_failure_exit(pTHX)
4618 /* We have been called to fall on our sword. The desired exit code
4619 * should be already set in STATUS_UNIX, but could be shifted over
4620 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4623 * If an error code has not been set, then force the issue.
4625 if (MY_POSIX_EXIT) {
4627 /* According to the die_exit.t tests, if errno is non-zero */
4628 /* It should be used for the error status. */
4630 if (errno == EVMSERR) {
4631 STATUS_NATIVE = vaxc$errno;
4634 /* According to die_exit.t tests, if the child_exit code is */
4635 /* also zero, then we need to exit with a code of 255 */
4636 if ((errno != 0) && (errno < 256))
4637 STATUS_UNIX_EXIT_SET(errno);
4638 else if (STATUS_UNIX < 255) {
4639 STATUS_UNIX_EXIT_SET(255);
4644 /* The exit code could have been set by $? or vmsish which
4645 * means that it may not have fatal set. So convert
4646 * success/warning codes to fatal with out changing
4647 * the POSIX status code. The severity makes VMS native
4648 * status handling work, while UNIX mode programs use the
4649 * the POSIX exit codes.
4651 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4652 STATUS_NATIVE &= STS$M_COND_ID;
4653 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4657 /* Traditionally Perl on VMS always expects a Fatal Error. */
4658 if (vaxc$errno & 1) {
4660 /* So force success status to failure */
4661 if (STATUS_NATIVE & 1)
4666 STATUS_UNIX = EINTR; /* In case something cares */
4671 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4673 /* Encode the severity code */
4674 severity = STATUS_NATIVE & STS$M_SEVERITY;
4675 STATUS_UNIX = (severity ? severity : 1) << 8;
4677 /* Perl expects this to be a fatal error */
4678 if (severity != STS$K_SEVERE)
4687 STATUS_UNIX_SET(errno);
4689 exitstatus = STATUS_UNIX >> 8;
4690 if (exitstatus & 255)
4691 STATUS_UNIX_SET(exitstatus);
4693 STATUS_UNIX_SET(255);
4700 S_my_exit_jump(pTHX)
4705 SvREFCNT_dec(PL_e_script);
4709 POPSTACK_TO(PL_mainstack);
4717 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4720 const char * const p = SvPVX_const(PL_e_script);
4721 const char *nl = strchr(p, '\n');
4723 PERL_UNUSED_ARG(idx);
4724 PERL_UNUSED_ARG(maxlen);
4726 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4728 filter_del(read_e_script);
4731 sv_catpvn(buf_sv, p, nl-p);
4732 sv_chop(PL_e_script, nl);
4738 * c-indentation-style: bsd
4740 * indent-tabs-mode: t
4743 * ex: set ts=8 sts=4 sw=4 noet: