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_IS_MINIPERL
1780 # ifdef PERL_MALLOC_WRAP
1783 # ifdef PERL_MEM_LOG
1786 # ifdef PERL_MEM_LOG_NOIMPL
1787 " PERL_MEM_LOG_NOIMPL"
1789 # ifdef PERL_USE_DEVEL
1792 # ifdef PERL_USE_SAFE_PUTENV
1793 " PERL_USE_SAFE_PUTENV"
1795 # ifdef USE_SITECUSTOMIZE
1796 " USE_SITECUSTOMIZE"
1798 # ifdef USE_FAST_STDIO
1803 sv_catpv(opts_prog, PL_bincompat_options);
1804 /* Terminate the qw(, and then wrap at 76 columns. */
1805 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1807 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1809 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1811 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1813 #if defined(LOCAL_PATCH_COUNT)
1814 if (LOCAL_PATCH_COUNT > 0) {
1816 sv_catpvs(opts_prog,
1817 "\" Locally applied patches:\\n\",");
1818 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1819 if (PL_localpatches[i])
1820 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1821 0, PL_localpatches[i], 0);
1825 Perl_sv_catpvf(aTHX_ opts_prog,
1826 "\" Built under %s\\n",OSNAME);
1829 sv_catpvs(opts_prog,
1830 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1832 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1835 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1836 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1837 "sort grep {/^PERL/} keys %ENV; ");
1839 sv_catpvs(opts_prog,
1840 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1842 sv_catpvs(opts_prog,
1843 "print \" \\%ENV:\\n @env\\n\" if @env;"
1844 "print \" \\@INC:\\n @INC\\n\";");
1848 opts_prog = Perl_newSVpvf(aTHX_
1849 "Config::config_vars(qw%c%s%c)",
1853 av_push(PL_preambleav, opts_prog);
1854 /* don't look for script or read stdin */
1855 scriptname = BIT_BUCKET;
1859 PL_doextract = TRUE;
1867 if (!*++s || isSPACE(*s)) {
1871 /* catch use of gnu style long options */
1872 if (strEQ(s, "version")) {
1876 if (strEQ(s, "help")) {
1883 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1894 #ifndef SECURE_INTERNAL_GETENV
1897 (s = PerlEnv_getenv("PERL5OPT")))
1901 if (*s == '-' && *(s+1) == 'T') {
1902 CHECK_MALLOC_TOO_LATE_FOR('T');
1904 PL_taint_warn = FALSE;
1907 char *popt_copy = NULL;
1920 if (!strchr("CDIMUdmtwW", *s))
1921 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1925 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1926 s = popt_copy + (s - d);
1934 if( !PL_tainting ) {
1935 PL_taint_warn = TRUE;
1946 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1948 /* SITELIB_EXP is a function call on Win32.
1949 The games with local $! are to avoid setting errno if there is no
1950 sitecustomize script. */
1951 const char *const sitelib = SITELIB_EXP;
1952 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1954 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1959 scriptname = argv[0];
1962 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1964 else if (scriptname == NULL) {
1966 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1972 /* Set $^X early so that it can be used for relocatable paths in @INC */
1973 assert (!PL_tainted);
1975 S_set_caret_X(aTHX);
1980 bool suidscript = FALSE;
1982 open_script(scriptname, dosearch, &suidscript, &rsfp);
1984 validate_suid(validarg, scriptname, fdscript, suidscript,
1988 # if defined(SIGCHLD) || defined(SIGCLD)
1991 # define SIGCHLD SIGCLD
1993 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1994 if (sigstate == (Sighandler_t) SIG_IGN) {
1995 if (ckWARN(WARN_SIGNAL))
1996 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1997 "Can't ignore signal CHLD, forcing to default");
1998 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2006 /* This will croak if suidscript is true, as -x cannot be used with
2008 forbid_setid('x', suidscript);
2009 /* Hence you can't get here if suidscript is true */
2011 find_beginning(linestr_sv, rsfp);
2012 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2013 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2017 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2018 CvUNIQUE_on(PL_compcv);
2020 CvPADLIST(PL_compcv) = pad_new(0);
2022 PL_isarev = newHV();
2025 boot_core_UNIVERSAL();
2029 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2031 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2037 # ifdef HAS_SOCKS5_INIT
2038 socks5_init(argv[0]);
2044 init_predump_symbols();
2045 /* init_postdump_symbols not currently designed to be called */
2046 /* more than once (ENV isn't cleared first, for example) */
2047 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2049 init_postdump_symbols(argc,argv,env);
2051 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2052 * or explicitly in some platforms.
2053 * locale.c:Perl_init_i18nl10n() if the environment
2054 * look like the user wants to use UTF-8. */
2055 #if defined(__SYMBIAN32__)
2056 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2058 # ifndef PERL_IS_MINIPERL
2060 /* Requires init_predump_symbols(). */
2061 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2066 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2067 * and the default open disciplines. */
2068 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2069 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2071 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2072 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2073 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2075 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2076 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2077 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2079 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2080 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2081 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2083 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2084 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2087 sv_setpvs(sv, ":utf8\0:utf8");
2089 sv_setpvs(sv, ":utf8\0");
2092 sv_setpvs(sv, "\0:utf8");
2101 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2102 if (strEQ(s, "unsafe"))
2103 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2104 else if (strEQ(s, "safe"))
2105 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2107 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2114 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2118 PL_xmlfp = PerlIO_stdout();
2120 PL_xmlfp = PerlIO_open(s, "w");
2122 Perl_croak(aTHX_ "Can't open %s", s);
2124 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2130 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2131 PL_madskills = atoi(s);
2132 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2137 lex_start(linestr_sv, rsfp, TRUE);
2138 PL_subname = newSVpvs("main");
2140 if (add_read_e_script)
2141 filter_add(read_e_script, NULL);
2143 /* now parse the script */
2145 SETERRNO(0,SS_NORMAL);
2146 if (yyparse() || PL_parser->error_count) {
2148 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2150 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2154 CopLINE_set(PL_curcop, 0);
2155 PL_curstash = PL_defstash;
2157 SvREFCNT_dec(PL_e_script);
2165 SAVECOPFILE(PL_curcop);
2166 SAVECOPLINE(PL_curcop);
2167 gv_check(PL_defstash);
2176 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2177 dump_mstats("after compilation:");
2187 =for apidoc perl_run
2189 Tells a Perl interpreter to run. See L<perlembed>.
2202 PERL_ARGS_ASSERT_PERL_RUN;
2203 #ifndef MULTIPLICITY
2204 PERL_UNUSED_ARG(my_perl);
2207 oldscope = PL_scopestack_ix;
2215 cxstack_ix = -1; /* start context stack again */
2217 case 0: /* normal completion */
2221 case 2: /* my_exit() */
2222 while (PL_scopestack_ix > oldscope)
2225 PL_curstash = PL_defstash;
2226 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2227 PL_endav && !PL_minus_c)
2228 call_list(oldscope, PL_endav);
2230 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2231 dump_mstats("after execution: ");
2237 POPSTACK_TO(PL_mainstack);
2240 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2251 S_run_body(pTHX_ I32 oldscope)
2254 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2255 PL_sawampersand ? "Enabling" : "Omitting"));
2257 if (!PL_restartop) {
2261 exit(0); /* less likely to core dump than my_exit(0) */
2265 if (DEBUG_x_TEST || DEBUG_B_TEST)
2266 dump_all_perl(!DEBUG_B_TEST);
2268 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2272 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2275 if (PERLDB_SINGLE && PL_DBsingle)
2276 sv_setiv(PL_DBsingle, 1);
2278 call_list(oldscope, PL_initav);
2279 #ifdef PERL_DEBUG_READONLY_OPS
2280 Perl_pending_Slabs_to_ro(aTHX);
2287 PL_op = PL_restartop;
2291 else if (PL_main_start) {
2292 CvDEPTH(PL_main_cv) = 1;
2293 PL_op = PL_main_start;
2301 =head1 SV Manipulation Functions
2303 =for apidoc p||get_sv
2305 Returns the SV of the specified Perl scalar. C<flags> are passed to
2306 C<gv_fetchpv>. If C<GV_ADD> is set and the
2307 Perl variable does not exist then it will be created. If C<flags> is zero
2308 and the variable does not exist then NULL is returned.
2314 Perl_get_sv(pTHX_ const char *name, I32 flags)
2318 PERL_ARGS_ASSERT_GET_SV;
2320 gv = gv_fetchpv(name, flags, SVt_PV);
2327 =head1 Array Manipulation Functions
2329 =for apidoc p||get_av
2331 Returns the AV of the specified Perl array. C<flags> are passed to
2332 C<gv_fetchpv>. If C<GV_ADD> is set and the
2333 Perl variable does not exist then it will be created. If C<flags> is zero
2334 and the variable does not exist then NULL is returned.
2340 Perl_get_av(pTHX_ const char *name, I32 flags)
2342 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2344 PERL_ARGS_ASSERT_GET_AV;
2354 =head1 Hash Manipulation Functions
2356 =for apidoc p||get_hv
2358 Returns the HV of the specified Perl hash. C<flags> are passed to
2359 C<gv_fetchpv>. If C<GV_ADD> is set and the
2360 Perl variable does not exist then it will be created. If C<flags> is zero
2361 and the variable does not exist then NULL is returned.
2367 Perl_get_hv(pTHX_ const char *name, I32 flags)
2369 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2371 PERL_ARGS_ASSERT_GET_HV;
2381 =head1 CV Manipulation Functions
2383 =for apidoc p||get_cvn_flags
2385 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2386 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2387 exist then it will be declared (which has the same effect as saying
2388 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2389 then NULL is returned.
2391 =for apidoc p||get_cv
2393 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2399 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2401 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2402 /* XXX this is probably not what they think they're getting.
2403 * It has the same effect as "sub name;", i.e. just a forward
2406 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2408 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2409 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2410 return newSUB(start_subparse(FALSE, 0),
2411 newSVOP(OP_CONST, 0, sv),
2419 /* Nothing in core calls this now, but we can't replace it with a macro and
2420 move it to mathoms.c as a macro would evaluate name twice. */
2422 Perl_get_cv(pTHX_ const char *name, I32 flags)
2424 PERL_ARGS_ASSERT_GET_CV;
2426 return get_cvn_flags(name, strlen(name), flags);
2429 /* Be sure to refetch the stack pointer after calling these routines. */
2433 =head1 Callback Functions
2435 =for apidoc p||call_argv
2437 Performs a callback to the specified Perl sub. See L<perlcall>.
2443 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2445 /* See G_* flags in cop.h */
2446 /* null terminated arg list */
2451 PERL_ARGS_ASSERT_CALL_ARGV;
2456 mXPUSHs(newSVpv(*argv,0));
2461 return call_pv(sub_name, flags);
2465 =for apidoc p||call_pv
2467 Performs a callback to the specified Perl sub. See L<perlcall>.
2473 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2474 /* name of the subroutine */
2475 /* See G_* flags in cop.h */
2477 PERL_ARGS_ASSERT_CALL_PV;
2479 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2483 =for apidoc p||call_method
2485 Performs a callback to the specified Perl method. The blessed object must
2486 be on the stack. See L<perlcall>.
2492 Perl_call_method(pTHX_ const char *methname, I32 flags)
2493 /* name of the subroutine */
2494 /* See G_* flags in cop.h */
2497 PERL_ARGS_ASSERT_CALL_METHOD;
2499 len = strlen(methname);
2501 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2502 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2505 /* May be called with any of a CV, a GV, or an SV containing the name. */
2507 =for apidoc p||call_sv
2509 Performs a callback to the Perl sub whose name is in the SV. See
2516 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2517 /* See G_* flags in cop.h */
2520 LOGOP myop; /* fake syntax tree node */
2525 bool oldcatch = CATCH_GET;
2527 OP* const oldop = PL_op;
2530 PERL_ARGS_ASSERT_CALL_SV;
2532 if (flags & G_DISCARD) {
2536 if (!(flags & G_WANT)) {
2537 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2542 Zero(&myop, 1, LOGOP);
2543 myop.op_next = NULL;
2544 if (!(flags & G_NOARGS))
2545 myop.op_flags |= OPf_STACKED;
2546 myop.op_flags |= OP_GIMME_REVERSE(flags);
2550 EXTEND(PL_stack_sp, 1);
2551 *++PL_stack_sp = sv;
2553 oldscope = PL_scopestack_ix;
2555 if (PERLDB_SUB && PL_curstash != PL_debstash
2556 /* Handle first BEGIN of -d. */
2557 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2558 /* Try harder, since this may have been a sighandler, thus
2559 * curstash may be meaningless. */
2560 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2561 && !(flags & G_NODEBUG))
2562 PL_op->op_private |= OPpENTERSUB_DB;
2564 if (flags & G_METHOD) {
2565 Zero(&method_op, 1, UNOP);
2566 method_op.op_next = PL_op;
2567 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2568 method_op.op_type = OP_METHOD;
2569 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2570 myop.op_type = OP_ENTERSUB;
2571 PL_op = (OP*)&method_op;
2574 if (!(flags & G_EVAL)) {
2576 CALL_BODY_SUB((OP*)&myop);
2577 retval = PL_stack_sp - (PL_stack_base + oldmark);
2578 CATCH_SET(oldcatch);
2581 myop.op_other = (OP*)&myop;
2583 create_eval_scope(flags|G_FAKINGEVAL);
2591 CALL_BODY_SUB((OP*)&myop);
2592 retval = PL_stack_sp - (PL_stack_base + oldmark);
2593 if (!(flags & G_KEEPERR)) {
2601 /* my_exit() was called */
2602 PL_curstash = PL_defstash;
2605 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2606 Perl_croak(aTHX_ "Callback called exit");
2611 PL_op = PL_restartop;
2615 PL_stack_sp = PL_stack_base + oldmark;
2616 if ((flags & G_WANT) == G_ARRAY)
2620 *++PL_stack_sp = &PL_sv_undef;
2625 if (PL_scopestack_ix > oldscope)
2626 delete_eval_scope();
2630 if (flags & G_DISCARD) {
2631 PL_stack_sp = PL_stack_base + oldmark;
2640 /* Eval a string. The G_EVAL flag is always assumed. */
2643 =for apidoc p||eval_sv
2645 Tells Perl to C<eval> the string in the SV.
2651 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2653 /* See G_* flags in cop.h */
2657 UNOP myop; /* fake syntax tree node */
2658 VOL I32 oldmark = SP - PL_stack_base;
2661 OP* const oldop = PL_op;
2664 PERL_ARGS_ASSERT_EVAL_SV;
2666 if (flags & G_DISCARD) {
2673 Zero(PL_op, 1, UNOP);
2674 EXTEND(PL_stack_sp, 1);
2675 *++PL_stack_sp = sv;
2677 if (!(flags & G_NOARGS))
2678 myop.op_flags = OPf_STACKED;
2679 myop.op_next = NULL;
2680 myop.op_type = OP_ENTEREVAL;
2681 myop.op_flags |= OP_GIMME_REVERSE(flags);
2682 if (flags & G_KEEPERR)
2683 myop.op_flags |= OPf_SPECIAL;
2685 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2686 * before a PUSHEVAL, which corrupts the stack after a croak */
2687 TAINT_PROPER("eval_sv()");
2693 CALL_BODY_EVAL((OP*)&myop);
2694 retval = PL_stack_sp - (PL_stack_base + oldmark);
2695 if (!(flags & G_KEEPERR)) {
2703 /* my_exit() was called */
2704 PL_curstash = PL_defstash;
2707 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2708 Perl_croak(aTHX_ "Callback called exit");
2713 PL_op = PL_restartop;
2717 PL_stack_sp = PL_stack_base + oldmark;
2718 if ((flags & G_WANT) == G_ARRAY)
2722 *++PL_stack_sp = &PL_sv_undef;
2728 if (flags & G_DISCARD) {
2729 PL_stack_sp = PL_stack_base + oldmark;
2739 =for apidoc p||eval_pv
2741 Tells Perl to C<eval> the given string and return an SV* result.
2747 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2751 SV* sv = newSVpv(p, 0);
2753 PERL_ARGS_ASSERT_EVAL_PV;
2755 eval_sv(sv, G_SCALAR);
2762 if (croak_on_error && SvTRUE(ERRSV)) {
2763 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2769 /* Require a module. */
2772 =head1 Embedding Functions
2774 =for apidoc p||require_pv
2776 Tells Perl to C<require> the file named by the string argument. It is
2777 analogous to the Perl code C<eval "require '$file'">. It's even
2778 implemented that way; consider using load_module instead.
2783 Perl_require_pv(pTHX_ const char *pv)
2789 PERL_ARGS_ASSERT_REQUIRE_PV;
2791 PUSHSTACKi(PERLSI_REQUIRE);
2793 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2794 eval_sv(sv_2mortal(sv), G_DISCARD);
2800 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2802 /* This message really ought to be max 23 lines.
2803 * Removed -h because the user already knows that option. Others? */
2805 static const char * const usage_msg[] = {
2806 "-0[octal] specify record separator (\\0, if no argument)",
2807 "-a autosplit mode with -n or -p (splits $_ into @F)",
2808 "-C[number/list] enables the listed Unicode features",
2809 "-c check syntax only (runs BEGIN and CHECK blocks)",
2810 "-d[:debugger] run program under debugger",
2811 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2812 "-e program one line of program (several -e's allowed, omit programfile)",
2813 "-E program like -e, but enables all optional features",
2814 "-f don't do $sitelib/sitecustomize.pl at startup",
2815 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2816 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2817 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2818 "-l[octal] enable line ending processing, specifies line terminator",
2819 "-[mM][-]module execute \"use/no module...\" before executing program",
2820 "-n assume \"while (<>) { ... }\" loop around program",
2821 "-p assume loop like -n but print line also, like sed",
2822 "-s enable rudimentary parsing for switches after programfile",
2823 "-S look for programfile using PATH environment variable",
2824 "-t enable tainting warnings",
2825 "-T enable tainting checks",
2826 "-u dump core after parsing program",
2827 "-U allow unsafe operations",
2828 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2829 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2830 "-w enable many useful warnings (RECOMMENDED)",
2831 "-W enable all warnings",
2832 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2833 "-X disable all warnings",
2837 const char * const *p = usage_msg;
2839 PERL_ARGS_ASSERT_USAGE;
2841 PerlIO_printf(PerlIO_stdout(),
2842 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2845 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2848 /* convert a string of -D options (or digits) into an int.
2849 * sets *s to point to the char after the options */
2853 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2855 static const char * const usage_msgd[] = {
2856 " Debugging flag values: (see also -d)",
2857 " p Tokenizing and parsing (with v, displays parse stack)",
2858 " s Stack snapshots (with v, displays all stacks)",
2859 " l Context (loop) stack processing",
2860 " t Trace execution",
2861 " o Method and overloading resolution",
2862 " c String/numeric conversions",
2863 " P Print profiling info, source file input state",
2864 " m Memory and SV allocation",
2865 " f Format processing",
2866 " r Regular expression parsing and execution",
2867 " x Syntax tree dump",
2868 " u Tainting checks",
2869 " H Hash dump -- usurps values()",
2870 " X Scratchpad allocation",
2873 " R Include reference counts of dumped variables (eg when using -Ds)",
2874 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2875 " v Verbose: use in conjunction with other flags",
2877 " A Consistency checks on internal structures",
2878 " q quiet - currently only suppresses the 'EXECUTING' message",
2879 " M trace smart match resolution",
2880 " B dump suBroutine definitions, including special Blocks like BEGIN",
2885 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2888 /* if adding extra options, remember to update DEBUG_MASK */
2889 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2891 for (; isALNUM(**s); (*s)++) {
2892 const char * const d = strchr(debopts,**s);
2894 i |= 1 << (d - debopts);
2895 else if (ckWARN_d(WARN_DEBUGGING))
2896 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2897 "invalid option -D%c, use -D'' to see choices\n", **s);
2900 else if (isDIGIT(**s)) {
2902 for (; isALNUM(**s); (*s)++) ;
2904 else if (givehelp) {
2905 const char *const *p = usage_msgd;
2906 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2909 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2910 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2911 "-Dp not implemented on this platform\n");
2917 /* This routine handles any switches that can be given during run */
2920 Perl_moreswitches(pTHX_ const char *s)
2924 const char option = *s; /* used to remember option in -m/-M code */
2926 PERL_ARGS_ASSERT_MORESWITCHES;
2934 SvREFCNT_dec(PL_rs);
2935 if (s[1] == 'x' && s[2]) {
2936 const char *e = s+=2;
2942 flags = PERL_SCAN_SILENT_ILLDIGIT;
2943 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2944 if (s + numlen < e) {
2945 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2949 PL_rs = newSVpvs("");
2950 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2951 tmps = (U8*)SvPVX(PL_rs);
2952 uvchr_to_utf8(tmps, rschar);
2953 SvCUR_set(PL_rs, UNISKIP(rschar));
2958 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2959 if (rschar & ~((U8)~0))
2960 PL_rs = &PL_sv_undef;
2961 else if (!rschar && numlen >= 2)
2962 PL_rs = newSVpvs("");
2964 char ch = (char)rschar;
2965 PL_rs = newSVpvn(&ch, 1);
2968 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2973 PL_unicode = parse_unicode_opts( (const char **)&s );
2974 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2980 while (*s && !isSPACE(*s)) ++s;
2981 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2992 forbid_setid('d', FALSE);
2995 /* -dt indicates to the debugger that threads will be used */
2996 if (*s == 't' && !isALNUM(s[1])) {
2998 my_setenv("PERL5DB_THREADED", "1");
3001 /* The following permits -d:Mod to accepts arguments following an =
3002 in the fashion that -MSome::Mod does. */
3003 if (*s == ':' || *s == '=') {
3004 const char *start = ++s;
3005 const char *const end = s + strlen(s);
3006 SV * const sv = newSVpvs("use Devel::");
3008 /* We now allow -d:Module=Foo,Bar */
3009 while(isALNUM(*s) || *s==':') ++s;
3011 sv_catpvn(sv, start, end - start);
3013 sv_catpvn(sv, start, s-start);
3014 /* Don't use NUL as q// delimiter here, this string goes in the
3016 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3019 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3023 PL_perldb = PERLDB_ALL;
3030 forbid_setid('D', FALSE);
3032 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3033 #else /* !DEBUGGING */
3034 if (ckWARN_d(WARN_DEBUGGING))
3035 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3036 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3037 for (s++; isALNUM(*s); s++) ;
3042 usage(PL_origargv[0]);
3045 Safefree(PL_inplace);
3046 #if defined(__CYGWIN__) /* do backup extension automagically */
3047 if (*(s+1) == '\0') {
3048 PL_inplace = savepvs(".bak");
3051 #endif /* __CYGWIN__ */
3053 const char * const start = ++s;
3054 while (*s && !isSPACE(*s))
3057 PL_inplace = savepvn(start, s - start);
3061 if (*s == '-') /* Additional switches on #! line. */
3065 case 'I': /* -I handled both here and in parse_body() */
3066 forbid_setid('I', FALSE);
3068 while (*s && isSPACE(*s))
3073 /* ignore trailing spaces (possibly followed by other switches) */
3075 for (e = p; *e && !isSPACE(*e); e++) ;
3079 } while (*p && *p != '-');
3081 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3087 Perl_croak(aTHX_ "No directory specified for -I");
3093 SvREFCNT_dec(PL_ors_sv);
3099 PL_ors_sv = newSVpvs("\n");
3100 numlen = 3 + (*s == '0');
3101 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3105 if (RsPARA(PL_rs)) {
3106 PL_ors_sv = newSVpvs("\n\n");
3109 PL_ors_sv = newSVsv(PL_rs);
3114 forbid_setid('M', FALSE); /* XXX ? */
3117 forbid_setid('m', FALSE); /* XXX ? */
3122 const char *use = "use ";
3124 /* -M-foo == 'no foo' */
3125 /* Leading space on " no " is deliberate, to make both
3126 possibilities the same length. */
3127 if (*s == '-') { use = " no "; ++s; }
3128 sv = newSVpvn(use,4);
3130 /* We allow -M'Module qw(Foo Bar)' */
3131 while(isALNUM(*s) || *s==':') {
3140 Perl_croak(aTHX_ "Module name required with -%c option",
3143 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3144 "contains single ':'",
3145 (int)(s - start), start, option);
3146 end = s + strlen(s);
3148 sv_catpvn(sv, start, end - start);
3149 if (option == 'm') {
3151 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3152 sv_catpvs( sv, " ()");
3155 sv_catpvn(sv, start, s-start);
3156 /* Use NUL as q''-delimiter. */
3157 sv_catpvs(sv, " split(/,/,q\0");
3159 sv_catpvn(sv, s, end - s);
3160 sv_catpvs(sv, "\0)");
3163 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3166 Perl_croak(aTHX_ "Missing argument to -%c", option);
3177 forbid_setid('s', FALSE);
3178 PL_doswitches = TRUE;
3192 PL_do_undump = TRUE;
3200 if (!sv_derived_from(PL_patchlevel, "version"))
3201 upg_version(PL_patchlevel, TRUE);
3204 SV* level= vstringify(PL_patchlevel);
3205 #ifdef PERL_PATCHNUM
3206 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3207 SV *num = newSVpvs(PERL_PATCHNUM "*");
3209 SV *num = newSVpvs(PERL_PATCHNUM);
3212 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3213 SvREFCNT_dec(level);
3216 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3220 PerlIO_printf(PerlIO_stdout(),
3221 "\nThis is perl, %"SVf
3225 SvREFCNT_dec(level);
3228 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3229 PerlIO_printf(PerlIO_stdout(),
3230 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3231 SVfARG(vstringify(PL_patchlevel))));
3232 PerlIO_printf(PerlIO_stdout(),
3233 Perl_form(aTHX_ " built under %s at %s %s\n",
3234 OSNAME, __DATE__, __TIME__));
3235 PerlIO_printf(PerlIO_stdout(),
3236 Perl_form(aTHX_ " OS Specific Release: %s\n",
3239 #if defined(LOCAL_PATCH_COUNT)
3240 if (LOCAL_PATCH_COUNT > 0)
3241 PerlIO_printf(PerlIO_stdout(),
3242 "\n(with %d registered patch%s, "
3243 "see perl -V for more detail)",
3245 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3248 PerlIO_printf(PerlIO_stdout(),
3249 "\n\nCopyright 1987-2009, Larry Wall\n");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3257 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3262 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3265 PerlIO_printf(PerlIO_stdout(),
3266 "atariST series port, ++jrb bammi@cadence.com\n");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "EPOC port by Olaf Flebbe, 1999-2002\n");
3297 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3298 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3301 #ifdef __SYMBIAN32__
3302 PerlIO_printf(PerlIO_stdout(),
3303 "Symbian port by Nokia, 2004-2005\n");
3305 #ifdef BINARY_BUILD_NOTICE
3306 BINARY_BUILD_NOTICE;
3308 PerlIO_printf(PerlIO_stdout(),
3310 Perl may be copied only under the terms of either the Artistic License or the\n\
3311 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3312 Complete documentation for Perl, including FAQ lists, should be found on\n\
3313 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3314 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3317 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3318 PL_dowarn |= G_WARN_ON;
3323 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3324 if (!specialWARN(PL_compiling.cop_warnings))
3325 PerlMemShared_free(PL_compiling.cop_warnings);
3326 PL_compiling.cop_warnings = pWARN_ALL ;
3330 PL_dowarn = G_WARN_ALL_OFF;
3331 if (!specialWARN(PL_compiling.cop_warnings))
3332 PerlMemShared_free(PL_compiling.cop_warnings);
3333 PL_compiling.cop_warnings = pWARN_NONE ;
3340 if (s[0] == '-') /* Additional switches on #! line. */
3345 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3351 #ifdef ALTERNATE_SHEBANG
3352 case 'S': /* OS/2 needs -S on "extproc" line. */
3356 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3361 /* compliments of Tom Christiansen */
3363 /* unexec() can be found in the Gnu emacs distribution */
3364 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3367 Perl_my_unexec(pTHX)
3369 PERL_UNUSED_CONTEXT;
3371 SV * prog = newSVpv(BIN_EXP, 0);
3372 SV * file = newSVpv(PL_origfilename, 0);
3376 sv_catpvs(prog, "/perl");
3377 sv_catpvs(file, ".perldump");
3379 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3380 /* unexec prints msg to stderr in case of failure */
3381 PerlProc_exit(status);
3384 # include <lib$routines.h>
3385 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3386 # elif defined(WIN32) || defined(__CYGWIN__)
3387 Perl_croak(aTHX_ "dump is not supported");
3389 ABORT(); /* for use with undump */
3394 /* initialize curinterp */
3400 # define PERLVAR(var,type)
3401 # define PERLVARA(var,n,type)
3402 # if defined(PERL_IMPLICIT_CONTEXT)
3403 # define PERLVARI(var,type,init) aTHX->var = init;
3404 # define PERLVARIC(var,type,init) aTHX->var = init;
3406 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3407 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3409 # include "intrpvar.h"
3415 # define PERLVAR(var,type)
3416 # define PERLVARA(var,n,type)
3417 # define PERLVARI(var,type,init) PL_##var = init;
3418 # define PERLVARIC(var,type,init) PL_##var = init;
3419 # include "intrpvar.h"
3426 /* As these are inside a structure, PERLVARI isn't capable of initialising
3428 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3429 PL_reg_poscache = PL_reg_starttry = NULL;
3433 S_init_main_stash(pTHX)
3438 PL_curstash = PL_defstash = newHV();
3439 /* We know that the string "main" will be in the global shared string
3440 table, so it's a small saving to use it rather than allocate another
3442 PL_curstname = newSVpvs_share("main");
3443 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3444 /* If we hadn't caused another reference to "main" to be in the shared
3445 string table above, then it would be worth reordering these two,
3446 because otherwise all we do is delete "main" from it as a consequence
3447 of the SvREFCNT_dec, only to add it again with hv_name_set */
3448 SvREFCNT_dec(GvHV(gv));
3449 hv_name_set(PL_defstash, "main", 4, 0);
3450 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3452 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3454 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3455 GvMULTI_on(PL_incgv);
3456 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3457 GvMULTI_on(PL_hintgv);
3458 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3459 SvREFCNT_inc_simple_void(PL_defgv);
3460 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3461 SvREFCNT_inc_simple_void(PL_errgv);
3462 GvMULTI_on(PL_errgv);
3463 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3464 GvMULTI_on(PL_replgv);
3465 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3466 #ifdef PERL_DONT_CREATE_GVSV
3469 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3471 PL_curstash = PL_defstash;
3472 CopSTASH_set(&PL_compiling, PL_defstash);
3473 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3474 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3476 /* We must init $/ before switches are processed. */
3477 sv_setpvs(get_sv("/", GV_ADD), "\n");
3481 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3482 bool *suidscript, PerlIO **rsfpp)
3487 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3490 PL_origfilename = savepvs("-e");
3493 /* if find_script() returns, it returns a malloc()-ed value */
3494 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3496 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3497 const char *s = scriptname + 8;
3503 * Tell apart "normal" usage of fdscript, e.g.
3504 * with bash on FreeBSD:
3505 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3506 * from usage in suidperl.
3507 * Does any "normal" usage leave garbage after the number???
3508 * Is it a mistake to use a similar /dev/fd/ construct for
3513 * Be supersafe and do some sanity-checks.
3514 * Still, can we be sure we got the right thing?
3517 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3520 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3522 scriptname = savepv(s + 1);
3523 Safefree(PL_origfilename);
3524 PL_origfilename = (char *)scriptname;
3529 CopFILE_free(PL_curcop);
3530 CopFILE_set(PL_curcop, PL_origfilename);
3531 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3532 scriptname = (char *)"";
3533 if (fdscript >= 0) {
3534 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3535 # if defined(HAS_FCNTL) && defined(F_SETFD)
3537 /* ensure close-on-exec */
3538 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3541 else if (!*scriptname) {
3542 forbid_setid(0, *suidscript);
3543 *rsfpp = PerlIO_stdin();
3546 #ifdef FAKE_BIT_BUCKET
3547 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3548 * is called) and still have the "-e" work. (Believe it or not,
3549 * a /dev/null is required for the "-e" to work because source
3550 * filter magic is used to implement it. ) This is *not* a general
3551 * replacement for a /dev/null. What we do here is create a temp
3552 * file (an empty file), open up that as the script, and then
3553 * immediately close and unlink it. Close enough for jazz. */
3554 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3555 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3556 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3557 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3558 FAKE_BIT_BUCKET_TEMPLATE
3560 const char * const err = "Failed to create a fake bit bucket";
3561 if (strEQ(scriptname, BIT_BUCKET)) {
3562 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3563 int tmpfd = mkstemp(tmpname);
3565 scriptname = tmpname;
3568 Perl_croak(aTHX_ err);
3571 scriptname = mktemp(tmpname);
3573 Perl_croak(aTHX_ err);
3578 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3579 #ifdef FAKE_BIT_BUCKET
3580 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3581 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3582 && strlen(scriptname) == sizeof(tmpname) - 1) {
3585 scriptname = BIT_BUCKET;
3587 # if defined(HAS_FCNTL) && defined(F_SETFD)
3589 /* ensure close-on-exec */
3590 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3594 /* PSz 16 Sep 03 Keep neat error message */
3596 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3598 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3599 CopFILE(PL_curcop), Strerror(errno));
3605 * I_SYSSTATVFS HAS_FSTATVFS
3607 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3608 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3609 * here so that metaconfig picks them up. */
3612 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3613 /* Don't even need this function. */
3616 S_validate_suid(pTHX_ PerlIO *rsfp)
3618 PERL_ARGS_ASSERT_VALIDATE_SUID;
3620 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3623 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3624 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3626 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3629 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3630 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3631 /* not set-id, must be wrapped */
3634 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3637 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3641 register const char *s2;
3643 PERL_ARGS_ASSERT_FIND_BEGINNING;
3645 /* skip forward in input to the real script? */
3647 while (PL_doextract) {
3648 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3649 Perl_croak(aTHX_ "No Perl script found in input\n");
3651 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3652 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3653 PL_doextract = FALSE;
3654 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3656 while (*s == ' ' || *s == '\t') s++;
3658 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3659 || s2[-1] == '_') s2--;
3660 if (strnEQ(s2-4,"perl",4))
3661 while ((s = moreswitches(s)))
3673 PL_uid = PerlProc_getuid();
3674 PL_euid = PerlProc_geteuid();
3675 PL_gid = PerlProc_getgid();
3676 PL_egid = PerlProc_getegid();
3678 PL_uid |= PL_gid << 16;
3679 PL_euid |= PL_egid << 16;
3681 /* Should not happen: */
3682 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3683 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3686 * Should go by suidscript, not uid!=euid: why disallow
3687 * system("ls") in scripts run from setuid things?
3688 * Or, is this run before we check arguments and set suidscript?
3689 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3690 * (We never have suidscript, can we be sure to have fdscript?)
3691 * Or must then go by UID checks? See comments in forbid_setid also.
3695 /* This is used very early in the lifetime of the program,
3696 * before even the options are parsed, so PL_tainting has
3697 * not been initialized properly. */
3699 Perl_doing_taint(int argc, char *argv[], char *envp[])
3701 #ifndef PERL_IMPLICIT_SYS
3702 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3703 * before we have an interpreter-- and the whole point of this
3704 * function is to be called at such an early stage. If you are on
3705 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3706 * "tainted because running with altered effective ids', you'll
3707 * have to add your own checks somewhere in here. The two most
3708 * known samples of 'implicitness' are Win32 and NetWare, neither
3709 * of which has much of concept of 'uids'. */
3710 int uid = PerlProc_getuid();
3711 int euid = PerlProc_geteuid();
3712 int gid = PerlProc_getgid();
3713 int egid = PerlProc_getegid();
3720 if (uid && (euid != uid || egid != gid))
3722 #endif /* !PERL_IMPLICIT_SYS */
3723 /* This is a really primitive check; environment gets ignored only
3724 * if -T are the first chars together; otherwise one gets
3725 * "Too late" message. */
3726 if ( argc > 1 && argv[1][0] == '-'
3727 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3732 /* Passing the flag as a single char rather than a string is a slight space
3733 optimisation. The only message that isn't /^-.$/ is
3734 "program input from stdin", which is substituted in place of '\0', which
3735 could never be a command line flag. */
3737 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3740 char string[3] = "-x";
3741 const char *message = "program input from stdin";
3748 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3749 if (PL_euid != PL_uid)
3750 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3751 if (PL_egid != PL_gid)
3752 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3753 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3755 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3759 Perl_init_debugger(pTHX)
3762 HV * const ostash = PL_curstash;
3764 PL_curstash = PL_debstash;
3765 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3767 AvREAL_off(PL_dbargs);
3768 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3769 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3770 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3771 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3772 sv_setiv(PL_DBsingle, 0);
3773 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3774 sv_setiv(PL_DBtrace, 0);
3775 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3776 sv_setiv(PL_DBsignal, 0);
3777 PL_curstash = ostash;
3780 #ifndef STRESS_REALLOC
3781 #define REASONABLE(size) (size)
3783 #define REASONABLE(size) (1) /* unreasonable */
3787 Perl_init_stacks(pTHX)
3790 /* start with 128-item stack and 8K cxstack */
3791 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3792 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3793 PL_curstackinfo->si_type = PERLSI_MAIN;
3794 PL_curstack = PL_curstackinfo->si_stack;
3795 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3797 PL_stack_base = AvARRAY(PL_curstack);
3798 PL_stack_sp = PL_stack_base;
3799 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3801 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3804 PL_tmps_max = REASONABLE(128);
3806 Newx(PL_markstack,REASONABLE(32),I32);
3807 PL_markstack_ptr = PL_markstack;
3808 PL_markstack_max = PL_markstack + REASONABLE(32);
3812 Newx(PL_scopestack,REASONABLE(32),I32);
3813 PL_scopestack_ix = 0;
3814 PL_scopestack_max = REASONABLE(32);
3816 Newx(PL_savestack,REASONABLE(128),ANY);
3817 PL_savestack_ix = 0;
3818 PL_savestack_max = REASONABLE(128);
3827 while (PL_curstackinfo->si_next)
3828 PL_curstackinfo = PL_curstackinfo->si_next;
3829 while (PL_curstackinfo) {
3830 PERL_SI *p = PL_curstackinfo->si_prev;
3831 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3832 Safefree(PL_curstackinfo->si_cxstack);
3833 Safefree(PL_curstackinfo);
3834 PL_curstackinfo = p;
3836 Safefree(PL_tmps_stack);
3837 Safefree(PL_markstack);
3838 Safefree(PL_scopestack);
3839 Safefree(PL_savestack);
3844 S_init_predump_symbols(pTHX)
3850 sv_setpvs(get_sv("\"", GV_ADD), " ");
3851 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3853 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3854 GvMULTI_on(PL_stdingv);
3855 io = GvIOp(PL_stdingv);
3856 IoTYPE(io) = IoTYPE_RDONLY;
3857 IoIFP(io) = PerlIO_stdin();
3858 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3860 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3862 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3865 IoTYPE(io) = IoTYPE_WRONLY;
3866 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3868 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3870 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3872 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3873 GvMULTI_on(PL_stderrgv);
3874 io = GvIOp(PL_stderrgv);
3875 IoTYPE(io) = IoTYPE_WRONLY;
3876 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3877 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3879 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3881 PL_statname = newSV(0); /* last filename we did stat on */
3883 Safefree(PL_osname);
3884 PL_osname = savepv(OSNAME);
3888 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3892 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3894 argc--,argv++; /* skip name of script */
3895 if (PL_doswitches) {
3896 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3900 if (argv[0][1] == '-' && !argv[0][2]) {
3904 if ((s = strchr(argv[0], '='))) {
3905 const char *const start_name = argv[0] + 1;
3906 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3907 TRUE, SVt_PV)), s + 1);
3910 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3913 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3914 GvMULTI_on(PL_argvgv);
3915 (void)gv_AVadd(PL_argvgv);
3916 av_clear(GvAVn(PL_argvgv));
3917 for (; argc > 0; argc--,argv++) {
3918 SV * const sv = newSVpv(argv[0],0);
3919 av_push(GvAVn(PL_argvgv),sv);
3920 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3921 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3924 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3925 (void)sv_utf8_decode(sv);
3931 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3936 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3938 PL_toptarget = newSV_type(SVt_PVFM);
3939 sv_setpvs(PL_toptarget, "");
3940 PL_bodytarget = newSV_type(SVt_PVFM);
3941 sv_setpvs(PL_bodytarget, "");
3942 PL_formtarget = PL_bodytarget;
3946 init_argv_symbols(argc,argv);
3948 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3949 sv_setpv(GvSV(tmpgv),PL_origfilename);
3951 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3953 bool env_is_not_environ;
3954 GvMULTI_on(PL_envgv);
3955 hv = GvHVn(PL_envgv);
3956 hv_magic(hv, NULL, PERL_MAGIC_env);
3958 #ifdef USE_ENVIRON_ARRAY
3959 /* Note that if the supplied env parameter is actually a copy
3960 of the global environ then it may now point to free'd memory
3961 if the environment has been modified since. To avoid this
3962 problem we treat env==NULL as meaning 'use the default'
3966 env_is_not_environ = env != environ;
3967 if (env_is_not_environ
3968 # ifdef USE_ITHREADS
3969 && PL_curinterp == aTHX
3978 for (; *env; env++) {
3981 if (!(s = strchr(old_var,'=')) || s == old_var)
3984 #if defined(MSDOS) && !defined(DJGPP)
3986 (void)strupr(old_var);
3989 sv = newSVpv(s+1, 0);
3990 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3991 if (env_is_not_environ)
3995 #endif /* USE_ENVIRON_ARRAY */
3996 #endif /* !PERL_MICRO */
3999 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4000 SvREADONLY_off(GvSV(tmpgv));
4001 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4002 SvREADONLY_on(GvSV(tmpgv));
4004 #ifdef THREADS_HAVE_PIDS
4005 PL_ppid = (IV)getppid();
4008 /* touch @F array to prevent spurious warnings 20020415 MJD */
4010 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4015 S_init_perllib(pTHX)
4019 const char *perl5lib = NULL;
4028 perl5lib = PerlEnv_getenv("PERL5LIB");
4030 * It isn't possible to delete an environment variable with
4031 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4032 * case we treat PERL5LIB as undefined if it has a zero-length value.
4034 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4035 if (perl5lib && *perl5lib != '\0')
4039 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4041 s = PerlEnv_getenv("PERLLIB");
4043 incpush_use_sep(s, 0, 0);
4046 /* Treat PERL5?LIB as a possible search list logical name -- the
4047 * "natural" VMS idiom for a Unix path string. We allow each
4048 * element to be a set of |-separated directories for compatibility.
4052 if (my_trnlnm("PERL5LIB",buf,0))
4054 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4055 } while (my_trnlnm("PERL5LIB",buf,++idx));
4057 while (my_trnlnm("PERLLIB",buf,idx++))
4058 incpush_use_sep(buf, 0, 0);
4063 #ifndef PERL_IS_MINIPERL
4064 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4065 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4067 /* Use the ~-expanded versions of APPLLIB (undocumented),
4068 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4071 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4072 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4076 /* sitearch is always relative to sitelib on Windows for
4077 * DLL-based path intuition to work correctly */
4078 # if !defined(WIN32)
4079 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4080 INCPUSH_CAN_RELOCATE);
4086 /* this picks up sitearch as well */
4087 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4089 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4091 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4095 #ifdef PERL_VENDORARCH_EXP
4096 /* vendorarch is always relative to vendorlib on Windows for
4097 * DLL-based path intuition to work correctly */
4098 # if !defined(WIN32)
4099 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4100 INCPUSH_CAN_RELOCATE);
4104 #ifdef PERL_VENDORLIB_EXP
4106 /* this picks up vendorarch as well */
4107 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4109 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4111 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4112 INCPUSH_CAN_RELOCATE);
4117 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4121 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4125 s = win32_get_privlib(PERL_FS_VERSION, &len);
4127 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4130 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4132 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4136 #ifdef PERL_OTHERLIBDIRS
4137 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4138 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4139 |INCPUSH_CAN_RELOCATE);
4145 * It isn't possible to delete an environment variable with
4146 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4147 * case we treat PERL5LIB as undefined if it has a zero-length value.
4149 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4150 if (perl5lib && *perl5lib != '\0')
4154 incpush_use_sep(perl5lib, 0,
4155 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4157 /* Treat PERL5?LIB as a possible search list logical name -- the
4158 * "natural" VMS idiom for a Unix path string. We allow each
4159 * element to be a set of |-separated directories for compatibility.
4163 if (my_trnlnm("PERL5LIB",buf,0))
4165 incpush_use_sep(buf, 0,
4166 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4167 } while (my_trnlnm("PERL5LIB",buf,++idx));
4171 /* Use the ~-expanded versions of APPLLIB (undocumented),
4172 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4175 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4176 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4179 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4180 /* Search for version-specific dirs below here */
4181 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4182 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4186 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4187 /* Search for version-specific dirs below here */
4188 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4189 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4192 #ifdef PERL_OTHERLIBDIRS
4193 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4194 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4195 |INCPUSH_CAN_RELOCATE);
4197 #endif /* !PERL_IS_MINIPERL */
4200 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4203 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4204 # define PERLLIB_SEP ';'
4207 # define PERLLIB_SEP '|'
4209 # define PERLLIB_SEP ':'
4212 #ifndef PERLLIB_MANGLE
4213 # define PERLLIB_MANGLE(s,n) (s)
4216 /* Push a directory onto @INC if it exists.
4217 Generate a new SV if we do this, to save needing to copy the SV we push
4220 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4225 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4227 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4228 S_ISDIR(tmpstatbuf.st_mode)) {
4230 dir = newSVsv(stem);
4232 /* Truncate dir back to stem. */
4233 SvCUR_set(dir, SvCUR(stem));
4239 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4242 const U8 using_sub_dirs
4243 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4244 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4245 const U8 add_versioned_sub_dirs
4246 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4247 const U8 add_archonly_sub_dirs
4248 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4249 #ifdef PERL_INC_VERSION_LIST
4250 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4252 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4253 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4254 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4255 AV *const inc = GvAVn(PL_incgv);
4257 PERL_ARGS_ASSERT_INCPUSH;
4260 /* Could remove this vestigial extra block, if we don't mind a lot of
4261 re-indenting diff noise. */
4264 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4265 arranged to unshift #! line -I onto the front of @INC. However,
4266 -I can add version and architecture specific libraries, and they
4267 need to go first. The old code assumed that it was always
4268 pushing. Hence to make it work, need to push the architecture
4269 (etc) libraries onto a temporary array, then "unshift" that onto
4270 the front of @INC. */
4271 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4274 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4275 defined to so something (in os2/os2.c), but the code has been
4276 this way, ignoring any possible changed of length, since
4277 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4279 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4281 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4284 /* Do the if() outside the #ifdef to avoid warnings about an unused
4287 #ifdef PERL_RELOCATABLE_INC
4289 * Relocatable include entries are marked with a leading .../
4292 * 0: Remove that leading ".../"
4293 * 1: Remove trailing executable name (anything after the last '/')
4294 * from the perl path to give a perl prefix
4296 * While the @INC element starts "../" and the prefix ends with a real
4297 * directory (ie not . or ..) chop that real directory off the prefix
4298 * and the leading "../" from the @INC element. ie a logical "../"
4300 * Finally concatenate the prefix and the remainder of the @INC element
4301 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4302 * generates /usr/local/lib/perl5
4304 const char *libpath = SvPVX(libdir);
4305 STRLEN libpath_len = SvCUR(libdir);
4306 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4308 SV * const caret_X = get_sv("\030", 0);
4309 /* Going to use the SV just as a scratch buffer holding a C
4315 /* $^X is *the* source of taint if tainting is on, hence
4316 SvPOK() won't be true. */
4318 assert(SvPOKp(caret_X));
4319 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4321 /* Firstly take off the leading .../
4322 If all else fail we'll do the paths relative to the current
4324 sv_chop(libdir, libpath + 4);
4325 /* Don't use SvPV as we're intentionally bypassing taining,
4326 mortal copies that the mg_get of tainting creates, and
4327 corruption that seems to come via the save stack.
4328 I guess that the save stack isn't correctly set up yet. */
4329 libpath = SvPVX(libdir);
4330 libpath_len = SvCUR(libdir);
4332 /* This would work more efficiently with memrchr, but as it's
4333 only a GNU extension we'd need to probe for it and
4334 implement our own. Not hard, but maybe not worth it? */
4336 prefix = SvPVX(prefix_sv);
4337 lastslash = strrchr(prefix, '/');
4339 /* First time in with the *lastslash = '\0' we just wipe off
4340 the trailing /perl from (say) /usr/foo/bin/perl
4344 while ((*lastslash = '\0'), /* Do that, come what may. */
4345 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4346 && (lastslash = strrchr(prefix, '/')))) {
4347 if (lastslash[1] == '\0'
4348 || (lastslash[1] == '.'
4349 && (lastslash[2] == '/' /* ends "/." */
4350 || (lastslash[2] == '/'
4351 && lastslash[3] == '/' /* or "/.." */
4353 /* Prefix ends "/" or "/." or "/..", any of which
4354 are fishy, so don't do any more logical cleanup.
4358 /* Remove leading "../" from path */
4361 /* Next iteration round the loop removes the last
4362 directory name from prefix by writing a '\0' in
4363 the while clause. */
4365 /* prefix has been terminated with a '\0' to the correct
4366 length. libpath points somewhere into the libdir SV.
4367 We need to join the 2 with '/' and drop the result into
4369 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4370 SvREFCNT_dec(libdir);
4371 /* And this is the new libdir. */
4374 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4375 /* Need to taint reloccated paths if running set ID */
4376 SvTAINTED_on(libdir);
4379 SvREFCNT_dec(prefix_sv);
4384 * BEFORE pushing libdir onto @INC we may first push version- and
4385 * archname-specific sub-directories.
4387 if (using_sub_dirs) {
4389 #ifdef PERL_INC_VERSION_LIST
4390 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4391 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4392 const char * const *incver;
4399 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4401 while (unix[len-1] == '/') len--; /* Cosmetic */
4402 sv_usepvn(libdir,unix,len);
4405 PerlIO_printf(Perl_error_log,
4406 "Failed to unixify @INC element \"%s\"\n",
4410 subdir = newSVsv(libdir);
4412 if (add_versioned_sub_dirs) {
4413 /* .../version/archname if -d .../version/archname */
4414 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4415 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4417 /* .../version if -d .../version */
4418 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4419 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4422 #ifdef PERL_INC_VERSION_LIST
4424 for (incver = incverlist; *incver; incver++) {
4425 /* .../xxx if -d .../xxx */
4426 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4427 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4432 if (add_archonly_sub_dirs) {
4433 /* .../archname if -d .../archname */
4434 sv_catpvs(subdir, "/" ARCHNAME);
4435 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4439 assert (SvREFCNT(subdir) == 1);
4440 SvREFCNT_dec(subdir);
4443 /* finally add this lib directory at the end of @INC */
4445 U32 extra = av_len(av) + 1;
4446 av_unshift(inc, extra + push_basedir);
4448 av_store(inc, extra, libdir);
4450 /* av owns a reference, av_store() expects to be donated a
4451 reference, and av expects to be sane when it's cleared.
4452 If I wanted to be naughty and wrong, I could peek inside the
4453 implementation of av_clear(), realise that it uses
4454 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4455 and so directly steal from it (with a memcpy() to inc, and
4456 then memset() to NULL them out. But people copy code from the
4457 core expecting it to be best practise, so let's use the API.
4458 Although studious readers will note that I'm not checking any
4460 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4464 else if (push_basedir) {
4465 av_push(inc, libdir);
4468 if (!push_basedir) {
4469 assert (SvREFCNT(libdir) == 1);
4470 SvREFCNT_dec(libdir);
4476 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4480 /* This logic has been broken out from S_incpush(). It may be possible to
4483 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4490 /* Break at all separators */
4491 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4493 /* skip any consecutive separators */
4495 /* Uncomment the next line for PATH semantics */
4496 /* But you'll need to write tests */
4497 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4499 incpush(p, (STRLEN)(s - p), flags);
4504 incpush(p, (STRLEN)(end - p), flags);
4509 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4513 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4519 PERL_ARGS_ASSERT_CALL_LIST;
4521 while (av_len(paramList) >= 0) {
4522 cv = MUTABLE_CV(av_shift(paramList));
4524 if (paramList == PL_beginav) {
4525 /* save PL_beginav for compiler */
4526 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4528 else if (paramList == PL_checkav) {
4529 /* save PL_checkav for compiler */
4530 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4532 else if (paramList == PL_unitcheckav) {
4533 /* save PL_unitcheckav for compiler */
4534 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4545 PL_madskills |= 16384;
4550 PL_madskills &= ~16384;
4553 (void)SvPV_const(atsv, len);
4555 PL_curcop = &PL_compiling;
4556 CopLINE_set(PL_curcop, oldline);
4557 if (paramList == PL_beginav)
4558 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4560 Perl_sv_catpvf(aTHX_ atsv,
4561 "%s failed--call queue aborted",
4562 paramList == PL_checkav ? "CHECK"
4563 : paramList == PL_initav ? "INIT"
4564 : paramList == PL_unitcheckav ? "UNITCHECK"
4566 while (PL_scopestack_ix > oldscope)
4569 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4576 /* my_exit() was called */
4577 while (PL_scopestack_ix > oldscope)
4580 PL_curstash = PL_defstash;
4581 PL_curcop = &PL_compiling;
4582 CopLINE_set(PL_curcop, oldline);
4584 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4585 if (paramList == PL_beginav)
4586 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4588 Perl_croak(aTHX_ "%s failed--call queue aborted",
4589 paramList == PL_checkav ? "CHECK"
4590 : paramList == PL_initav ? "INIT"
4591 : paramList == PL_unitcheckav ? "UNITCHECK"
4598 PL_curcop = &PL_compiling;
4599 CopLINE_set(PL_curcop, oldline);
4602 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4611 Perl_my_exit(pTHX_ U32 status)
4622 STATUS_EXIT_SET(status);
4629 Perl_my_failure_exit(pTHX)
4633 /* We have been called to fall on our sword. The desired exit code
4634 * should be already set in STATUS_UNIX, but could be shifted over
4635 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4638 * If an error code has not been set, then force the issue.
4640 if (MY_POSIX_EXIT) {
4642 /* According to the die_exit.t tests, if errno is non-zero */
4643 /* It should be used for the error status. */
4645 if (errno == EVMSERR) {
4646 STATUS_NATIVE = vaxc$errno;
4649 /* According to die_exit.t tests, if the child_exit code is */
4650 /* also zero, then we need to exit with a code of 255 */
4651 if ((errno != 0) && (errno < 256))
4652 STATUS_UNIX_EXIT_SET(errno);
4653 else if (STATUS_UNIX < 255) {
4654 STATUS_UNIX_EXIT_SET(255);
4659 /* The exit code could have been set by $? or vmsish which
4660 * means that it may not have fatal set. So convert
4661 * success/warning codes to fatal with out changing
4662 * the POSIX status code. The severity makes VMS native
4663 * status handling work, while UNIX mode programs use the
4664 * the POSIX exit codes.
4666 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4667 STATUS_NATIVE &= STS$M_COND_ID;
4668 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4672 /* Traditionally Perl on VMS always expects a Fatal Error. */
4673 if (vaxc$errno & 1) {
4675 /* So force success status to failure */
4676 if (STATUS_NATIVE & 1)
4681 STATUS_UNIX = EINTR; /* In case something cares */
4686 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4688 /* Encode the severity code */
4689 severity = STATUS_NATIVE & STS$M_SEVERITY;
4690 STATUS_UNIX = (severity ? severity : 1) << 8;
4692 /* Perl expects this to be a fatal error */
4693 if (severity != STS$K_SEVERE)
4702 STATUS_UNIX_SET(errno);
4704 exitstatus = STATUS_UNIX >> 8;
4705 if (exitstatus & 255)
4706 STATUS_UNIX_SET(exitstatus);
4708 STATUS_UNIX_SET(255);
4715 S_my_exit_jump(pTHX)
4720 SvREFCNT_dec(PL_e_script);
4724 POPSTACK_TO(PL_mainstack);
4732 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4735 const char * const p = SvPVX_const(PL_e_script);
4736 const char *nl = strchr(p, '\n');
4738 PERL_UNUSED_ARG(idx);
4739 PERL_UNUSED_ARG(maxlen);
4741 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4743 filter_del(read_e_script);
4746 sv_catpvn(buf_sv, p, nl-p);
4747 sv_chop(PL_e_script, nl);
4753 * c-indentation-style: bsd
4755 * indent-tabs-mode: t
4758 * ex: set ts=8 sts=4 sw=4 noet: