3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A ship then new they built for him
13 * of mithril and of elven-glass
14 * --from Bilbo's song of EƤrendil
16 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 /* This file contains the top-level functions that are used to create, use
20 * and destroy a perl interpreter, plus the functions used by XS code to
21 * call back into perl. Note that it does not contain the actual main()
22 * function of the interpreter; that can be found in perlmain.c
26 #define PERL_IN_PERL_C
28 #include "patchlevel.h" /* for local_patches */
34 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
39 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
41 # include <sys/wait.h>
49 char control[CMSG_SPACE(sizeof(int))];
66 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
67 char *getenv (char *); /* Usually in <stdlib.h> */
70 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
72 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
73 /* Drop everything. Heck, don't even try to call it */
74 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
76 /* Drop almost everything */
77 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
80 #define CALL_BODY_EVAL(myop) \
81 if (PL_op == (myop)) \
82 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
86 #define CALL_BODY_SUB(myop) \
87 if (PL_op == (myop)) \
88 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
92 #define CALL_LIST_BODY(cv) \
93 PUSHMARK(PL_stack_sp); \
94 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
97 S_init_tls_and_interp(PerlInterpreter *my_perl)
101 PERL_SET_INTERP(my_perl);
102 #if defined(USE_ITHREADS)
105 PERL_SET_THX(my_perl);
108 MUTEX_INIT(&PL_dollarzero_mutex);
110 #ifdef PERL_IMPLICIT_CONTEXT
111 MUTEX_INIT(&PL_my_ctx_mutex);
114 #if defined(USE_ITHREADS)
117 /* This always happens for non-ithreads */
120 PERL_SET_THX(my_perl);
125 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
128 Perl_sys_init(int* argc, char*** argv)
132 PERL_ARGS_ASSERT_SYS_INIT;
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_SYS_INIT_BODY(argc, argv);
140 Perl_sys_init3(int* argc, char*** argv, char*** env)
144 PERL_ARGS_ASSERT_SYS_INIT3;
146 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
147 PERL_UNUSED_ARG(argv);
148 PERL_UNUSED_ARG(env);
149 PERL_SYS_INIT3_BODY(argc, argv, env);
156 if (!PL_veto_cleanup) {
157 PERL_SYS_TERM_BODY();
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
172 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
174 /* Newx() needs interpreter, so call malloc() instead */
175 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
176 S_init_tls_and_interp(my_perl);
177 Zero(my_perl, 1, PerlInterpreter);
187 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
194 =head1 Embedding Functions
196 =for apidoc perl_alloc
198 Allocates a new Perl interpreter. See L<perlembed>.
206 PerlInterpreter *my_perl;
208 /* Newx() needs interpreter, so call malloc() instead */
209 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
211 S_init_tls_and_interp(my_perl);
212 #ifndef PERL_TRACK_MEMPOOL
213 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
215 Zero(my_perl, 1, PerlInterpreter);
216 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
220 #endif /* PERL_IMPLICIT_SYS */
223 =for apidoc perl_construct
225 Initializes a new Perl interpreter. See L<perlembed>.
231 perl_construct(pTHXx)
235 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
239 PL_perl_destruct_level = 1;
241 PERL_UNUSED_ARG(my_perl);
242 if (PL_perl_destruct_level > 0)
245 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. However, as &PL_sv_no doesn't contain
256 a string that is a valid numer, we have to turn the public flags by
262 SvREADONLY_on(&PL_sv_no);
263 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
265 sv_setpv(&PL_sv_yes,PL_Yes);
268 SvREADONLY_on(&PL_sv_yes);
269 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
271 SvREADONLY_on(&PL_sv_placeholder);
272 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
274 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
275 #ifdef PERL_USES_PL_PIDSTATUS
276 PL_pidstatus = newHV();
279 PL_rs = newSVpvs("\n");
289 SET_NUMERIC_STANDARD();
291 #if defined(LOCAL_PATCH_COUNT)
292 PL_localpatches = local_patches; /* For possible -v */
295 #ifdef HAVE_INTERP_INTERN
299 PerlIO_init(aTHX); /* Hook to IO system */
301 PL_fdpid = newAV(); /* for remembering popen pids by fd */
302 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
303 PL_errors = newSVpvs("");
304 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
305 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
306 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
308 /* First entry is a list of empty elements. It needs to be initialised
309 else all hell breaks loose in S_find_uninit_var(). */
310 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
311 PL_regex_pad = AvARRAY(PL_regex_padav);
313 #ifdef USE_REENTRANT_API
314 Perl_reentrant_init(aTHX);
317 /* Note that strtab is a rather special HV. Assumptions are made
318 about not iterating on it, and not adding tie magic to it.
319 It is properly deallocated in perl_destruct() */
322 HvSHAREKEYS_off(PL_strtab); /* mandatory */
323 hv_ksplit(PL_strtab, 512);
325 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
326 _dyld_lookup_and_bind
327 ("__environ", (unsigned long *) &environ_pointer, NULL);
331 # ifdef USE_ENVIRON_ARRAY
332 PL_origenviron = environ;
336 /* Use sysconf(_SC_CLK_TCK) if available, if not
337 * available or if the sysconf() fails, use the HZ.
338 * BeOS has those, but returns the wrong value.
339 * The HZ if not originally defined has been by now
340 * been defined as CLK_TCK, if available. */
341 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
342 PL_clocktick = sysconf(_SC_CLK_TCK);
343 if (PL_clocktick <= 0)
347 PL_stashcache = newHV();
349 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
352 if (!PL_mmap_page_size) {
353 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
355 SETERRNO(0, SS_NORMAL);
357 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
359 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
361 if ((long) PL_mmap_page_size < 0) {
363 SV * const error = ERRSV;
364 SvUPGRADE(error, SVt_PV);
365 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
368 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
372 # ifdef HAS_GETPAGESIZE
373 PL_mmap_page_size = getpagesize();
375 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
376 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
380 if (PL_mmap_page_size <= 0)
381 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
382 (IV) PL_mmap_page_size);
384 #endif /* HAS_MMAP */
386 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
387 PL_timesbase.tms_utime = 0;
388 PL_timesbase.tms_stime = 0;
389 PL_timesbase.tms_cutime = 0;
390 PL_timesbase.tms_cstime = 0;
393 PL_registered_mros = newHV();
394 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
395 HvMAX(PL_registered_mros) = 0;
401 =for apidoc nothreadhook
403 Stub that provides thread hook for perl_destruct when there are
410 Perl_nothreadhook(pTHX)
416 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
418 Perl_dump_sv_child(pTHX_ SV *sv)
421 const int sock = PL_dumper_fd;
422 const int debug_fd = PerlIO_fileno(Perl_debug_log);
423 union control_un control;
426 struct cmsghdr *cmptr;
428 unsigned char buffer[256];
430 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
432 if(sock == -1 || debug_fd == -1)
435 PerlIO_flush(Perl_debug_log);
437 /* All these shenanigans are to pass a file descriptor over to our child for
438 it to dump out to. We can't let it hold open the file descriptor when it
439 forks, as the file descriptor it will dump to can turn out to be one end
440 of pipe that some other process will wait on for EOF. (So as it would
441 be open, the wait would be forever.) */
443 msg.msg_control = control.control;
444 msg.msg_controllen = sizeof(control.control);
445 /* We're a connected socket so we don't need a destination */
451 cmptr = CMSG_FIRSTHDR(&msg);
452 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
453 cmptr->cmsg_level = SOL_SOCKET;
454 cmptr->cmsg_type = SCM_RIGHTS;
455 *((int *)CMSG_DATA(cmptr)) = 1;
457 vec[0].iov_base = (void*)&sv;
458 vec[0].iov_len = sizeof(sv);
459 got = sendmsg(sock, &msg, 0);
462 perror("Debug leaking scalars parent sendmsg failed");
465 if(got < sizeof(sv)) {
466 perror("Debug leaking scalars parent short sendmsg");
470 /* Return protocol is
472 unsigned char: length of location string (0 for empty)
473 unsigned char*: string (not terminated)
475 vec[0].iov_base = (void*)&returned_errno;
476 vec[0].iov_len = sizeof(returned_errno);
477 vec[1].iov_base = buffer;
480 got = readv(sock, vec, 2);
483 perror("Debug leaking scalars parent read failed");
484 PerlIO_flush(PerlIO_stderr());
487 if(got < sizeof(returned_errno) + 1) {
488 perror("Debug leaking scalars parent short read");
489 PerlIO_flush(PerlIO_stderr());
494 got = read(sock, buffer + 1, *buffer);
496 perror("Debug leaking scalars parent read 2 failed");
497 PerlIO_flush(PerlIO_stderr());
502 perror("Debug leaking scalars parent short read 2");
503 PerlIO_flush(PerlIO_stderr());
508 if (returned_errno || *buffer) {
509 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
510 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
511 returned_errno, strerror(returned_errno));
517 =for apidoc perl_destruct
519 Shuts down a Perl interpreter. See L<perlembed>.
528 VOL signed char destruct_level; /* see possible values in intrpvar.h */
530 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
534 PERL_ARGS_ASSERT_PERL_DESTRUCT;
536 PERL_UNUSED_ARG(my_perl);
539 /* wait for all pseudo-forked children to finish */
540 PERL_WAIT_FOR_CHILDREN;
542 destruct_level = PL_perl_destruct_level;
545 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
547 const int i = atoi(s);
548 if (destruct_level < i)
554 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
560 if (PL_endav && !PL_minus_c)
561 call_list(PL_scopestack_ix, PL_endav);
567 /* Need to flush since END blocks can produce output */
570 if (CALL_FPTR(PL_threadhook)(aTHX)) {
571 /* Threads hook has vetoed further cleanup */
572 PL_veto_cleanup = TRUE;
576 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
577 if (destruct_level != 0) {
578 /* Fork here to create a child. Our child's job is to preserve the
579 state of scalars prior to destruction, so that we can instruct it
580 to dump any scalars that we later find have leaked.
581 There's no subtlety in this code - it assumes POSIX, and it doesn't
585 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
586 perror("Debug leaking scalars socketpair failed");
592 perror("Debug leaking scalars fork failed");
596 /* We are the child */
597 const int sock = fd[1];
598 const int debug_fd = PerlIO_fileno(Perl_debug_log);
601 /* Our success message is an integer 0, and a char 0 */
602 static const char success[sizeof(int) + 1] = {0};
606 /* We need to close all other file descriptors otherwise we end up
607 with interesting hangs, where the parent closes its end of a
608 pipe, and sits waiting for (another) child to terminate. Only
609 that child never terminates, because it never gets EOF, because
610 we also have the far end of the pipe open. We even need to
611 close the debugging fd, because sometimes it happens to be one
612 end of a pipe, and a process is waiting on the other end for
613 EOF. Normally it would be closed at some point earlier in
614 destruction, but if we happen to cause the pipe to remain open,
615 EOF never occurs, and we get an infinite hang. Hence all the
616 games to pass in a file descriptor if it's actually needed. */
618 f = sysconf(_SC_OPEN_MAX);
620 where = "sysconf failed";
631 union control_un control;
634 struct cmsghdr *cmptr;
638 msg.msg_control = control.control;
639 msg.msg_controllen = sizeof(control.control);
640 /* We're a connected socket so we don't need a source */
644 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
646 vec[0].iov_base = (void*)⌖
647 vec[0].iov_len = sizeof(target);
649 got = recvmsg(sock, &msg, 0);
654 where = "recv failed";
657 if(got < sizeof(target)) {
658 where = "short recv";
662 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
666 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
667 where = "wrong cmsg_len";
670 if(cmptr->cmsg_level != SOL_SOCKET) {
671 where = "wrong cmsg_level";
674 if(cmptr->cmsg_type != SCM_RIGHTS) {
675 where = "wrong cmsg_type";
679 got_fd = *(int*)CMSG_DATA(cmptr);
680 /* For our last little bit of trickery, put the file descriptor
681 back into Perl_debug_log, as if we never actually closed it
683 if(got_fd != debug_fd) {
684 if (dup2(got_fd, debug_fd) == -1) {
691 PerlIO_flush(Perl_debug_log);
693 got = write(sock, &success, sizeof(success));
696 where = "write failed";
699 if(got < sizeof(success)) {
700 where = "short write";
707 int send_errno = errno;
708 unsigned char length = (unsigned char) strlen(where);
709 struct iovec failure[3] = {
710 {(void*)&send_errno, sizeof(send_errno)},
712 {(void*)where, length}
714 int got = writev(sock, failure, 3);
715 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
716 in the parent if we try to read from the socketpair after the
717 child has exited, even if there was data to read.
718 So sleep a bit to give the parent a fighting chance of
721 _exit((got == -1) ? errno : 0);
725 PL_dumper_fd = fd[0];
730 /* We must account for everything. */
732 /* Destroy the main CV and syntax tree */
733 /* Do this now, because destroying ops can cause new SVs to be generated
734 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
735 PL_curcop to point to a valid op from which the filename structure
737 PL_curcop = &PL_compiling;
739 /* ensure comppad/curpad to refer to main's pad */
740 if (CvPADLIST(PL_main_cv)) {
741 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
743 op_free(PL_main_root);
746 PL_main_start = NULL;
747 SvREFCNT_dec(PL_main_cv);
751 /* Tell PerlIO we are about to tear things apart in case
752 we have layers which are using resources that should
756 PerlIO_destruct(aTHX);
758 if (PL_sv_objcount) {
760 * Try to destruct global references. We do this first so that the
761 * destructors and destructees still exist. Some sv's might remain.
762 * Non-referenced objects are on their own.
766 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
767 PL_defoutgv = NULL; /* may have been freed */
770 /* unhook hooks which will soon be, or use, destroyed data */
771 SvREFCNT_dec(PL_warnhook);
773 SvREFCNT_dec(PL_diehook);
776 /* call exit list functions */
777 while (PL_exitlistlen-- > 0)
778 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
780 Safefree(PL_exitlist);
785 SvREFCNT_dec(PL_registered_mros);
787 /* jettison our possibly duplicated environment */
788 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
789 * so we certainly shouldn't free it here
792 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
793 if (environ != PL_origenviron && !PL_use_safe_putenv
795 /* only main thread can free environ[0] contents */
796 && PL_curinterp == aTHX
802 for (i = 0; environ[i]; i++)
803 safesysfree(environ[i]);
805 /* Must use safesysfree() when working with environ. */
806 safesysfree(environ);
808 environ = PL_origenviron;
811 #endif /* !PERL_MICRO */
813 if (destruct_level == 0) {
815 DEBUG_P(debprofdump());
817 #if defined(PERLIO_LAYERS)
818 /* No more IO - including error messages ! */
819 PerlIO_cleanup(aTHX);
822 CopFILE_free(&PL_compiling);
823 CopSTASH_free(&PL_compiling);
825 /* The exit() function will do everything that needs doing. */
829 /* reset so print() ends up where we expect */
833 /* the syntax tree is shared between clones
834 * so op_free(PL_main_root) only ReREFCNT_dec's
835 * REGEXPs in the parent interpreter
836 * we need to manually ReREFCNT_dec for the clones
838 SvREFCNT_dec(PL_regex_padav);
839 PL_regex_padav = NULL;
843 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
844 PL_stashcache = NULL;
846 /* loosen bonds of global variables */
848 /* XXX can PL_parser still be non-null here? */
849 if(PL_parser && PL_parser->rsfp) {
850 (void)PerlIO_close(PL_parser->rsfp);
851 PL_parser->rsfp = NULL;
855 Safefree(PL_splitstr);
865 PL_doswitches = FALSE;
866 PL_dowarn = G_WARN_OFF;
867 PL_doextract = FALSE;
868 PL_sawampersand = FALSE; /* must save all match strings */
871 Safefree(PL_inplace);
873 SvREFCNT_dec(PL_patchlevel);
876 SvREFCNT_dec(PL_e_script);
882 /* magical thingies */
884 SvREFCNT_dec(PL_ofsgv); /* *, */
887 SvREFCNT_dec(PL_ors_sv); /* $\ */
890 SvREFCNT_dec(PL_rs); /* $/ */
893 Safefree(PL_osname); /* $^O */
896 SvREFCNT_dec(PL_statname);
900 /* defgv, aka *_ should be taken care of elsewhere */
902 /* clean up after study() */
903 SvREFCNT_dec(PL_lastscream);
904 PL_lastscream = NULL;
905 Safefree(PL_screamfirst);
907 Safefree(PL_screamnext);
911 Safefree(PL_efloatbuf);
915 /* startup and shutdown function lists */
916 SvREFCNT_dec(PL_beginav);
917 SvREFCNT_dec(PL_beginav_save);
918 SvREFCNT_dec(PL_endav);
919 SvREFCNT_dec(PL_checkav);
920 SvREFCNT_dec(PL_checkav_save);
921 SvREFCNT_dec(PL_unitcheckav);
922 SvREFCNT_dec(PL_unitcheckav_save);
923 SvREFCNT_dec(PL_initav);
925 PL_beginav_save = NULL;
928 PL_checkav_save = NULL;
929 PL_unitcheckav = NULL;
930 PL_unitcheckav_save = NULL;
933 /* shortcuts just get cleared */
942 PL_last_in_gv = NULL;
954 SvREFCNT_dec(PL_argvout_stack);
955 PL_argvout_stack = NULL;
957 SvREFCNT_dec(PL_modglobal);
959 SvREFCNT_dec(PL_preambleav);
960 PL_preambleav = NULL;
961 SvREFCNT_dec(PL_subname);
963 #ifdef PERL_USES_PL_PIDSTATUS
964 SvREFCNT_dec(PL_pidstatus);
967 SvREFCNT_dec(PL_toptarget);
969 SvREFCNT_dec(PL_bodytarget);
970 PL_bodytarget = NULL;
971 PL_formtarget = NULL;
973 /* free locale stuff */
974 #ifdef USE_LOCALE_COLLATE
975 Safefree(PL_collation_name);
976 PL_collation_name = NULL;
979 #ifdef USE_LOCALE_NUMERIC
980 Safefree(PL_numeric_name);
981 PL_numeric_name = NULL;
982 SvREFCNT_dec(PL_numeric_radix_sv);
983 PL_numeric_radix_sv = NULL;
986 /* clear utf8 character classes */
987 SvREFCNT_dec(PL_utf8_alnum);
988 SvREFCNT_dec(PL_utf8_alnumc);
989 SvREFCNT_dec(PL_utf8_ascii);
990 SvREFCNT_dec(PL_utf8_alpha);
991 SvREFCNT_dec(PL_utf8_space);
992 SvREFCNT_dec(PL_utf8_cntrl);
993 SvREFCNT_dec(PL_utf8_graph);
994 SvREFCNT_dec(PL_utf8_digit);
995 SvREFCNT_dec(PL_utf8_upper);
996 SvREFCNT_dec(PL_utf8_lower);
997 SvREFCNT_dec(PL_utf8_print);
998 SvREFCNT_dec(PL_utf8_punct);
999 SvREFCNT_dec(PL_utf8_xdigit);
1000 SvREFCNT_dec(PL_utf8_mark);
1001 SvREFCNT_dec(PL_utf8_toupper);
1002 SvREFCNT_dec(PL_utf8_totitle);
1003 SvREFCNT_dec(PL_utf8_tolower);
1004 SvREFCNT_dec(PL_utf8_tofold);
1005 SvREFCNT_dec(PL_utf8_idstart);
1006 SvREFCNT_dec(PL_utf8_idcont);
1007 PL_utf8_alnum = NULL;
1008 PL_utf8_alnumc = NULL;
1009 PL_utf8_ascii = NULL;
1010 PL_utf8_alpha = NULL;
1011 PL_utf8_space = NULL;
1012 PL_utf8_cntrl = NULL;
1013 PL_utf8_graph = NULL;
1014 PL_utf8_digit = NULL;
1015 PL_utf8_upper = NULL;
1016 PL_utf8_lower = NULL;
1017 PL_utf8_print = NULL;
1018 PL_utf8_punct = NULL;
1019 PL_utf8_xdigit = NULL;
1020 PL_utf8_mark = NULL;
1021 PL_utf8_toupper = NULL;
1022 PL_utf8_totitle = NULL;
1023 PL_utf8_tolower = NULL;
1024 PL_utf8_tofold = NULL;
1025 PL_utf8_idstart = NULL;
1026 PL_utf8_idcont = NULL;
1028 if (!specialWARN(PL_compiling.cop_warnings))
1029 PerlMemShared_free(PL_compiling.cop_warnings);
1030 PL_compiling.cop_warnings = NULL;
1031 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1032 PL_compiling.cop_hints_hash = NULL;
1033 CopFILE_free(&PL_compiling);
1034 CopSTASH_free(&PL_compiling);
1036 /* Prepare to destruct main symbol table. */
1041 SvREFCNT_dec(PL_curstname);
1042 PL_curstname = NULL;
1044 /* clear queued errors */
1045 SvREFCNT_dec(PL_errors);
1048 SvREFCNT_dec(PL_isarev);
1051 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1052 if (PL_scopestack_ix != 0)
1053 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1054 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1055 (long)PL_scopestack_ix);
1056 if (PL_savestack_ix != 0)
1057 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1058 "Unbalanced saves: %ld more saves than restores\n",
1059 (long)PL_savestack_ix);
1060 if (PL_tmps_floor != -1)
1061 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1062 (long)PL_tmps_floor + 1);
1063 if (cxstack_ix != -1)
1064 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1065 (long)cxstack_ix + 1);
1068 /* Now absolutely destruct everything, somehow or other, loops or no. */
1070 /* the 2 is for PL_fdpid and PL_strtab */
1071 while (sv_clean_all() > 2)
1074 AvREAL_off(PL_fdpid); /* no surviving entries */
1075 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1078 #ifdef HAVE_INTERP_INTERN
1082 /* Destruct the global string table. */
1084 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1085 * so that sv_free() won't fail on them.
1086 * Now that the global string table is using a single hunk of memory
1087 * for both HE and HEK, we either need to explicitly unshare it the
1088 * correct way, or actually free things here.
1091 const I32 max = HvMAX(PL_strtab);
1092 HE * const * const array = HvARRAY(PL_strtab);
1093 HE *hent = array[0];
1096 if (hent && ckWARN_d(WARN_INTERNAL)) {
1097 HE * const next = HeNEXT(hent);
1098 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1099 "Unbalanced string table refcount: (%ld) for \"%s\"",
1100 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1107 hent = array[riter];
1112 HvARRAY(PL_strtab) = 0;
1113 HvTOTALKEYS(PL_strtab) = 0;
1114 HvFILL(PL_strtab) = 0;
1116 SvREFCNT_dec(PL_strtab);
1119 /* free the pointer tables used for cloning */
1120 ptr_table_free(PL_ptr_table);
1121 PL_ptr_table = (PTR_TBL_t*)NULL;
1124 /* free special SVs */
1126 SvREFCNT(&PL_sv_yes) = 0;
1127 sv_clear(&PL_sv_yes);
1128 SvANY(&PL_sv_yes) = NULL;
1129 SvFLAGS(&PL_sv_yes) = 0;
1131 SvREFCNT(&PL_sv_no) = 0;
1132 sv_clear(&PL_sv_no);
1133 SvANY(&PL_sv_no) = NULL;
1134 SvFLAGS(&PL_sv_no) = 0;
1138 for (i=0; i<=2; i++) {
1139 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1140 sv_clear(PERL_DEBUG_PAD(i));
1141 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1142 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1146 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1147 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1149 #ifdef DEBUG_LEAKING_SCALARS
1150 if (PL_sv_count != 0) {
1155 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1156 svend = &sva[SvREFCNT(sva)];
1157 for (sv = sva + 1; sv < svend; ++sv) {
1158 if (SvTYPE(sv) != SVTYPEMASK) {
1159 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1161 " refcnt=%"UVuf pTHX__FORMAT "\n"
1162 "\tallocated at %s:%d %s %s%s\n",
1163 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1165 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1167 sv->sv_debug_inpad ? "for" : "by",
1168 sv->sv_debug_optype ?
1169 PL_op_name[sv->sv_debug_optype]: "(none)",
1170 sv->sv_debug_cloned ? " (cloned)" : ""
1172 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1173 Perl_dump_sv_child(aTHX_ sv);
1179 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1183 /* Wait for up to 4 seconds for child to terminate.
1184 This seems to be the least effort way of timing out on reaping
1186 struct timeval waitfor = {4, 0};
1187 int sock = PL_dumper_fd;
1191 FD_SET(sock, &rset);
1192 select(sock + 1, &rset, NULL, NULL, &waitfor);
1193 waitpid(child, &status, WNOHANG);
1198 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1204 #ifdef PERL_DEBUG_READONLY_OPS
1210 #if defined(PERLIO_LAYERS)
1211 /* No more IO - including error messages ! */
1212 PerlIO_cleanup(aTHX);
1215 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1216 as currently layers use it rather than NULL as a marker
1217 for no arg - and will try and SvREFCNT_dec it.
1219 SvREFCNT(&PL_sv_undef) = 0;
1220 SvREADONLY_off(&PL_sv_undef);
1222 Safefree(PL_origfilename);
1223 PL_origfilename = NULL;
1224 Safefree(PL_reg_start_tmp);
1225 PL_reg_start_tmp = (char**)NULL;
1226 PL_reg_start_tmpl = 0;
1227 Safefree(PL_reg_curpm);
1228 Safefree(PL_reg_poscache);
1229 free_tied_hv_pool();
1230 Safefree(PL_op_mask);
1231 Safefree(PL_psig_name);
1232 PL_psig_name = (SV**)NULL;
1233 PL_psig_ptr = (SV**)NULL;
1234 Safefree(PL_psig_pend);
1235 PL_psig_pend = (int*)NULL;
1237 /* We need to NULL PL_psig_pend first, so that
1238 signal handlers know not to use it */
1239 int *psig_save = PL_psig_pend;
1240 PL_psig_pend = (int*)NULL;
1241 Safefree(psig_save);
1245 PL_tainting = FALSE;
1246 PL_taint_warn = FALSE;
1247 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1250 DEBUG_P(debprofdump());
1252 #ifdef USE_REENTRANT_API
1253 Perl_reentrant_free(aTHX);
1258 while (PL_regmatch_slab) {
1259 regmatch_slab *s = PL_regmatch_slab;
1260 PL_regmatch_slab = PL_regmatch_slab->next;
1264 /* As the absolutely last thing, free the non-arena SV for mess() */
1267 /* we know that type == SVt_PVMG */
1269 /* it could have accumulated taint magic */
1272 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1273 moremagic = mg->mg_moremagic;
1274 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1276 Safefree(mg->mg_ptr);
1280 /* we know that type >= SVt_PV */
1281 SvPV_free(PL_mess_sv);
1282 Safefree(SvANY(PL_mess_sv));
1283 Safefree(PL_mess_sv);
1290 =for apidoc perl_free
1292 Releases a Perl interpreter. See L<perlembed>.
1302 PERL_ARGS_ASSERT_PERL_FREE;
1304 if (PL_veto_cleanup)
1307 #ifdef PERL_TRACK_MEMPOOL
1310 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1311 * value as we're probably hunting memory leaks then
1313 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1314 if (!s || atoi(s) == 0) {
1315 const U32 old_debug = PL_debug;
1316 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1317 thread at thread exit. */
1319 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1320 "free this thread's memory\n");
1321 PL_debug &= ~ DEBUG_m_FLAG;
1323 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1324 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1325 PL_debug = old_debug;
1330 #if defined(WIN32) || defined(NETWARE)
1331 # if defined(PERL_IMPLICIT_SYS)
1334 void *host = nw_internal_host;
1336 void *host = w32_internal_host;
1338 PerlMem_free(aTHXx);
1340 nw_delete_internal_host(host);
1342 win32_delete_internal_host(host);
1346 PerlMem_free(aTHXx);
1349 PerlMem_free(aTHXx);
1353 #if defined(USE_ITHREADS)
1354 /* provide destructors to clean up the thread key when libperl is unloaded */
1355 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1357 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1358 #pragma fini "perl_fini"
1359 #elif defined(__sun) && !defined(__GNUC__)
1360 #pragma fini (perl_fini)
1364 #if defined(__GNUC__)
1365 __attribute__((destructor))
1370 if (PL_curinterp && !PL_veto_cleanup)
1375 #endif /* THREADS */
1378 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1381 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1382 PL_exitlist[PL_exitlistlen].fn = fn;
1383 PL_exitlist[PL_exitlistlen].ptr = ptr;
1387 #ifdef HAS_PROCSELFEXE
1388 /* This is a function so that we don't hold on to MAXPATHLEN
1389 bytes of stack longer than necessary
1392 S_procself_val(pTHX_ SV *sv, const char *arg0)
1394 char buf[MAXPATHLEN];
1395 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1397 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1398 includes a spurious NUL which will cause $^X to fail in system
1399 or backticks (this will prevent extensions from being built and
1400 many tests from working). readlink is not meant to add a NUL.
1401 Normal readlink works fine.
1403 if (len > 0 && buf[len-1] == '\0') {
1407 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1408 returning the text "unknown" from the readlink rather than the path
1409 to the executable (or returning an error from the readlink). Any valid
1410 path has a '/' in it somewhere, so use that to validate the result.
1411 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1413 if (len > 0 && memchr(buf, '/', len)) {
1414 sv_setpvn(sv,buf,len);
1420 #endif /* HAS_PROCSELFEXE */
1423 S_set_caret_X(pTHX) {
1425 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1427 #ifdef HAS_PROCSELFEXE
1428 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1431 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1433 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1440 =for apidoc perl_parse
1442 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1448 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1455 PERL_ARGS_ASSERT_PERL_PARSE;
1456 #ifndef MULTIPLICITY
1457 PERL_UNUSED_ARG(my_perl);
1460 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1461 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1462 * This MUST be done before any hash stores or fetches take place.
1463 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1464 * yourself, it is your responsibility to provide a good random seed!
1465 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1466 if (!PL_rehash_seed_set)
1467 PL_rehash_seed = get_hash_seed();
1469 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1471 if (s && (atoi(s) == 1))
1472 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1474 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1479 if (PL_origalen != 0) {
1480 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1483 /* Set PL_origalen be the sum of the contiguous argv[]
1484 * elements plus the size of the env in case that it is
1485 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1486 * as the maximum modifiable length of $0. In the worst case
1487 * the area we are able to modify is limited to the size of
1488 * the original argv[0]. (See below for 'contiguous', though.)
1490 const char *s = NULL;
1493 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1494 /* Do the mask check only if the args seem like aligned. */
1496 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1498 /* See if all the arguments are contiguous in memory. Note
1499 * that 'contiguous' is a loose term because some platforms
1500 * align the argv[] and the envp[]. If the arguments look
1501 * like non-aligned, assume that they are 'strictly' or
1502 * 'traditionally' contiguous. If the arguments look like
1503 * aligned, we just check that they are within aligned
1504 * PTRSIZE bytes. As long as no system has something bizarre
1505 * like the argv[] interleaved with some other data, we are
1506 * fine. (Did I just evoke Murphy's Law?) --jhi */
1507 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1509 for (i = 1; i < PL_origargc; i++) {
1510 if ((PL_origargv[i] == s + 1
1512 || PL_origargv[i] == s + 2
1517 (PL_origargv[i] > s &&
1519 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1530 #ifndef PERL_USE_SAFE_PUTENV
1531 /* Can we grab env area too to be used as the area for $0? */
1532 if (s && PL_origenviron && !PL_use_safe_putenv) {
1533 if ((PL_origenviron[0] == s + 1)
1536 (PL_origenviron[0] > s &&
1537 PL_origenviron[0] <=
1538 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1541 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1542 s = PL_origenviron[0];
1545 my_setenv("NoNe SuCh", NULL);
1546 /* Force copy of environment. */
1547 for (i = 1; PL_origenviron[i]; i++) {
1548 if (PL_origenviron[i] == s + 1
1551 (PL_origenviron[i] > s &&
1552 PL_origenviron[i] <=
1553 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1556 s = PL_origenviron[i];
1564 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1566 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1571 /* Come here if running an undumped a.out. */
1573 PL_origfilename = savepv(argv[0]);
1574 PL_do_undump = FALSE;
1575 cxstack_ix = -1; /* start label stack again */
1577 assert (!PL_tainted);
1579 S_set_caret_X(aTHX);
1581 init_postdump_symbols(argc,argv,env);
1586 op_free(PL_main_root);
1587 PL_main_root = NULL;
1589 PL_main_start = NULL;
1590 SvREFCNT_dec(PL_main_cv);
1594 oldscope = PL_scopestack_ix;
1595 PL_dowarn = G_WARN_OFF;
1600 parse_body(env,xsinit);
1602 call_list(oldscope, PL_unitcheckav);
1604 call_list(oldscope, PL_checkav);
1611 /* my_exit() was called */
1612 while (PL_scopestack_ix > oldscope)
1615 PL_curstash = PL_defstash;
1617 call_list(oldscope, PL_unitcheckav);
1619 call_list(oldscope, PL_checkav);
1623 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1631 #define INCPUSH_UNSHIFT 0x01
1632 #define INCPUSH_ADD_OLD_VERS 0x02
1633 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1634 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1635 #define INCPUSH_NOT_BASEDIR 0x10
1636 #define INCPUSH_CAN_RELOCATE 0x20
1637 #define INCPUSH_ADD_SUB_DIRS \
1638 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1641 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1645 int argc = PL_origargc;
1646 char **argv = PL_origargv;
1647 const char *scriptname = NULL;
1648 VOL bool dosearch = FALSE;
1650 const char *cddir = NULL;
1651 #ifdef USE_SITECUSTOMIZE
1652 bool minus_f = FALSE;
1654 SV *linestr_sv = newSV_type(SVt_PVIV);
1655 bool add_read_e_script = FALSE;
1657 SvGROW(linestr_sv, 80);
1658 sv_setpvs(linestr_sv,"");
1664 for (argc--,argv++; argc > 0; argc--,argv++) {
1665 if (argv[0][0] != '-' || !argv[0][1])
1671 #ifndef PERL_STRICT_CR
1695 if ((s = moreswitches(s)))
1700 CHECK_MALLOC_TOO_LATE_FOR('t');
1701 if( !PL_tainting ) {
1702 PL_taint_warn = TRUE;
1708 CHECK_MALLOC_TOO_LATE_FOR('T');
1710 PL_taint_warn = FALSE;
1718 forbid_setid('e', FALSE);
1720 PL_e_script = newSVpvs("");
1721 add_read_e_script = TRUE;
1724 sv_catpv(PL_e_script, s);
1726 sv_catpv(PL_e_script, argv[1]);
1730 Perl_croak(aTHX_ "No code specified for -%c", c);
1731 sv_catpvs(PL_e_script, "\n");
1735 #ifdef USE_SITECUSTOMIZE
1741 case 'I': /* -I handled both here and in moreswitches() */
1742 forbid_setid('I', FALSE);
1743 if (!*++s && (s=argv[1]) != NULL) {
1747 STRLEN len = strlen(s);
1748 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1751 Perl_croak(aTHX_ "No directory specified for -I");
1754 forbid_setid('S', FALSE);
1762 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1764 /* Can't do newSVpvs() as that would involve pre-processor
1765 condititionals inside a macro expansion. */
1766 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1773 # ifdef PERL_DISABLE_PMC
1776 # ifdef PERL_DONT_CREATE_GVSV
1777 " PERL_DONT_CREATE_GVSV"
1779 # ifdef PERL_MALLOC_WRAP
1782 # ifdef PERL_MEM_LOG
1785 # ifdef PERL_MEM_LOG_NOIMPL
1786 " PERL_MEM_LOG_NOIMPL"
1788 # ifdef PERL_USE_DEVEL
1791 # ifdef PERL_USE_SAFE_PUTENV
1792 " PERL_USE_SAFE_PUTENV"
1794 # ifdef USE_SITECUSTOMIZE
1795 " USE_SITECUSTOMIZE"
1797 # ifdef USE_FAST_STDIO
1802 sv_catpv(opts_prog, PL_bincompat_options);
1803 /* Terminate the qw(, and then wrap at 76 columns. */
1804 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1806 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1808 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1810 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1812 #if defined(LOCAL_PATCH_COUNT)
1813 if (LOCAL_PATCH_COUNT > 0) {
1815 sv_catpvs(opts_prog,
1816 "\" Locally applied patches:\\n\",");
1817 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1818 if (PL_localpatches[i])
1819 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1820 0, PL_localpatches[i], 0);
1824 Perl_sv_catpvf(aTHX_ opts_prog,
1825 "\" Built under %s\\n",OSNAME);
1828 sv_catpvs(opts_prog,
1829 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1831 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1834 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1835 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1836 "sort grep {/^PERL/} keys %ENV; ");
1838 sv_catpvs(opts_prog,
1839 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1841 sv_catpvs(opts_prog,
1842 "print \" \\%ENV:\\n @env\\n\" if @env;"
1843 "print \" \\@INC:\\n @INC\\n\";");
1847 opts_prog = Perl_newSVpvf(aTHX_
1848 "Config::config_vars(qw%c%s%c)",
1852 av_push(PL_preambleav, opts_prog);
1853 /* don't look for script or read stdin */
1854 scriptname = BIT_BUCKET;
1858 PL_doextract = TRUE;
1866 if (!*++s || isSPACE(*s)) {
1870 /* catch use of gnu style long options */
1871 if (strEQ(s, "version")) {
1875 if (strEQ(s, "help")) {
1882 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1893 #ifndef SECURE_INTERNAL_GETENV
1896 (s = PerlEnv_getenv("PERL5OPT")))
1900 if (*s == '-' && *(s+1) == 'T') {
1901 CHECK_MALLOC_TOO_LATE_FOR('T');
1903 PL_taint_warn = FALSE;
1906 char *popt_copy = NULL;
1919 if (!strchr("CDIMUdmtwW", *s))
1920 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1924 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1925 s = popt_copy + (s - d);
1933 if( !PL_tainting ) {
1934 PL_taint_warn = TRUE;
1945 #ifdef USE_SITECUSTOMIZE
1947 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1948 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1953 scriptname = argv[0];
1956 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1958 else if (scriptname == NULL) {
1960 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1966 /* Set $^X early so that it can be used for relocatable paths in @INC */
1967 assert (!PL_tainted);
1969 S_set_caret_X(aTHX);
1974 bool suidscript = FALSE;
1976 open_script(scriptname, dosearch, &suidscript, &rsfp);
1978 validate_suid(validarg, scriptname, fdscript, suidscript,
1982 # if defined(SIGCHLD) || defined(SIGCLD)
1985 # define SIGCHLD SIGCLD
1987 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1988 if (sigstate == (Sighandler_t) SIG_IGN) {
1989 if (ckWARN(WARN_SIGNAL))
1990 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1991 "Can't ignore signal CHLD, forcing to default");
1992 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2000 /* This will croak if suidscript is true, as -x cannot be used with
2002 forbid_setid('x', suidscript);
2003 /* Hence you can't get here if suidscript is true */
2005 find_beginning(linestr_sv, rsfp);
2006 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2007 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2011 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2012 CvUNIQUE_on(PL_compcv);
2014 CvPADLIST(PL_compcv) = pad_new(0);
2016 PL_isarev = newHV();
2019 boot_core_UNIVERSAL();
2023 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2025 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2031 # ifdef HAS_SOCKS5_INIT
2032 socks5_init(argv[0]);
2038 init_predump_symbols();
2039 /* init_postdump_symbols not currently designed to be called */
2040 /* more than once (ENV isn't cleared first, for example) */
2041 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2043 init_postdump_symbols(argc,argv,env);
2045 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2046 * or explicitly in some platforms.
2047 * locale.c:Perl_init_i18nl10n() if the environment
2048 * look like the user wants to use UTF-8. */
2049 #if defined(__SYMBIAN32__)
2050 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2053 /* Requires init_predump_symbols(). */
2054 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2059 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2060 * and the default open disciplines. */
2061 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2062 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2064 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2065 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2066 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2068 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2069 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2070 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2072 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2073 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2074 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2076 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2077 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2080 sv_setpvs(sv, ":utf8\0:utf8");
2082 sv_setpvs(sv, ":utf8\0");
2085 sv_setpvs(sv, "\0:utf8");
2093 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2094 if (strEQ(s, "unsafe"))
2095 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2096 else if (strEQ(s, "safe"))
2097 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2099 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2106 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2110 PL_xmlfp = PerlIO_stdout();
2112 PL_xmlfp = PerlIO_open(s, "w");
2114 Perl_croak(aTHX_ "Can't open %s", s);
2116 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2122 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2123 PL_madskills = atoi(s);
2124 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2129 lex_start(linestr_sv, rsfp, TRUE);
2130 PL_subname = newSVpvs("main");
2132 if (add_read_e_script)
2133 filter_add(read_e_script, NULL);
2135 /* now parse the script */
2137 SETERRNO(0,SS_NORMAL);
2138 if (yyparse() || PL_parser->error_count) {
2140 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2142 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2146 CopLINE_set(PL_curcop, 0);
2147 PL_curstash = PL_defstash;
2149 SvREFCNT_dec(PL_e_script);
2157 SAVECOPFILE(PL_curcop);
2158 SAVECOPLINE(PL_curcop);
2159 gv_check(PL_defstash);
2168 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2169 dump_mstats("after compilation:");
2179 =for apidoc perl_run
2181 Tells a Perl interpreter to run. See L<perlembed>.
2194 PERL_ARGS_ASSERT_PERL_RUN;
2195 #ifndef MULTIPLICITY
2196 PERL_UNUSED_ARG(my_perl);
2199 oldscope = PL_scopestack_ix;
2207 cxstack_ix = -1; /* start context stack again */
2209 case 0: /* normal completion */
2213 case 2: /* my_exit() */
2214 while (PL_scopestack_ix > oldscope)
2217 PL_curstash = PL_defstash;
2218 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2219 PL_endav && !PL_minus_c)
2220 call_list(oldscope, PL_endav);
2222 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2223 dump_mstats("after execution: ");
2229 POPSTACK_TO(PL_mainstack);
2232 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2243 S_run_body(pTHX_ I32 oldscope)
2246 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2247 PL_sawampersand ? "Enabling" : "Omitting"));
2249 if (!PL_restartop) {
2253 exit(0); /* less likely to core dump than my_exit(0) */
2256 DEBUG_x(dump_all());
2259 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2263 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2266 if (PERLDB_SINGLE && PL_DBsingle)
2267 sv_setiv(PL_DBsingle, 1);
2269 call_list(oldscope, PL_initav);
2270 #ifdef PERL_DEBUG_READONLY_OPS
2271 Perl_pending_Slabs_to_ro(aTHX);
2278 PL_op = PL_restartop;
2282 else if (PL_main_start) {
2283 CvDEPTH(PL_main_cv) = 1;
2284 PL_op = PL_main_start;
2292 =head1 SV Manipulation Functions
2294 =for apidoc p||get_sv
2296 Returns the SV of the specified Perl scalar. C<flags> are passed to
2297 C<gv_fetchpv>. If C<GV_ADD> is set and the
2298 Perl variable does not exist then it will be created. If C<flags> is zero
2299 and the variable does not exist then NULL is returned.
2305 Perl_get_sv(pTHX_ const char *name, I32 flags)
2309 PERL_ARGS_ASSERT_GET_SV;
2311 gv = gv_fetchpv(name, flags, SVt_PV);
2318 =head1 Array Manipulation Functions
2320 =for apidoc p||get_av
2322 Returns the AV of the specified Perl array. C<flags> are passed to
2323 C<gv_fetchpv>. If C<GV_ADD> is set and the
2324 Perl variable does not exist then it will be created. If C<flags> is zero
2325 and the variable does not exist then NULL is returned.
2331 Perl_get_av(pTHX_ const char *name, I32 flags)
2333 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2335 PERL_ARGS_ASSERT_GET_AV;
2345 =head1 Hash Manipulation Functions
2347 =for apidoc p||get_hv
2349 Returns the HV of the specified Perl hash. C<flags> are passed to
2350 C<gv_fetchpv>. If C<GV_ADD> is set and the
2351 Perl variable does not exist then it will be created. If C<flags> is zero
2352 and the variable does not exist then NULL is returned.
2358 Perl_get_hv(pTHX_ const char *name, I32 flags)
2360 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2362 PERL_ARGS_ASSERT_GET_HV;
2372 =head1 CV Manipulation Functions
2374 =for apidoc p||get_cvn_flags
2376 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2377 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2378 exist then it will be declared (which has the same effect as saying
2379 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2380 then NULL is returned.
2382 =for apidoc p||get_cv
2384 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2390 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2392 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2393 /* XXX this is probably not what they think they're getting.
2394 * It has the same effect as "sub name;", i.e. just a forward
2397 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2399 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2400 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2401 return newSUB(start_subparse(FALSE, 0),
2402 newSVOP(OP_CONST, 0, sv),
2410 /* Nothing in core calls this now, but we can't replace it with a macro and
2411 move it to mathoms.c as a macro would evaluate name twice. */
2413 Perl_get_cv(pTHX_ const char *name, I32 flags)
2415 PERL_ARGS_ASSERT_GET_CV;
2417 return get_cvn_flags(name, strlen(name), flags);
2420 /* Be sure to refetch the stack pointer after calling these routines. */
2424 =head1 Callback Functions
2426 =for apidoc p||call_argv
2428 Performs a callback to the specified Perl sub. See L<perlcall>.
2434 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2436 /* See G_* flags in cop.h */
2437 /* null terminated arg list */
2442 PERL_ARGS_ASSERT_CALL_ARGV;
2447 mXPUSHs(newSVpv(*argv,0));
2452 return call_pv(sub_name, flags);
2456 =for apidoc p||call_pv
2458 Performs a callback to the specified Perl sub. See L<perlcall>.
2464 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2465 /* name of the subroutine */
2466 /* See G_* flags in cop.h */
2468 PERL_ARGS_ASSERT_CALL_PV;
2470 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2474 =for apidoc p||call_method
2476 Performs a callback to the specified Perl method. The blessed object must
2477 be on the stack. See L<perlcall>.
2483 Perl_call_method(pTHX_ const char *methname, I32 flags)
2484 /* name of the subroutine */
2485 /* See G_* flags in cop.h */
2487 PERL_ARGS_ASSERT_CALL_METHOD;
2489 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2492 /* May be called with any of a CV, a GV, or an SV containing the name. */
2494 =for apidoc p||call_sv
2496 Performs a callback to the Perl sub whose name is in the SV. See
2503 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2504 /* See G_* flags in cop.h */
2507 LOGOP myop; /* fake syntax tree node */
2512 bool oldcatch = CATCH_GET;
2514 OP* const oldop = PL_op;
2517 PERL_ARGS_ASSERT_CALL_SV;
2519 if (flags & G_DISCARD) {
2523 if (!(flags & G_WANT)) {
2524 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2529 Zero(&myop, 1, LOGOP);
2530 myop.op_next = NULL;
2531 if (!(flags & G_NOARGS))
2532 myop.op_flags |= OPf_STACKED;
2533 myop.op_flags |= OP_GIMME_REVERSE(flags);
2537 EXTEND(PL_stack_sp, 1);
2538 *++PL_stack_sp = sv;
2540 oldscope = PL_scopestack_ix;
2542 if (PERLDB_SUB && PL_curstash != PL_debstash
2543 /* Handle first BEGIN of -d. */
2544 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2545 /* Try harder, since this may have been a sighandler, thus
2546 * curstash may be meaningless. */
2547 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2548 && !(flags & G_NODEBUG))
2549 PL_op->op_private |= OPpENTERSUB_DB;
2551 if (flags & G_METHOD) {
2552 Zero(&method_op, 1, UNOP);
2553 method_op.op_next = PL_op;
2554 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2555 method_op.op_type = OP_METHOD;
2556 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2557 myop.op_type = OP_ENTERSUB;
2558 PL_op = (OP*)&method_op;
2561 if (!(flags & G_EVAL)) {
2563 CALL_BODY_SUB((OP*)&myop);
2564 retval = PL_stack_sp - (PL_stack_base + oldmark);
2565 CATCH_SET(oldcatch);
2568 myop.op_other = (OP*)&myop;
2570 create_eval_scope(flags|G_FAKINGEVAL);
2578 CALL_BODY_SUB((OP*)&myop);
2579 retval = PL_stack_sp - (PL_stack_base + oldmark);
2580 if (!(flags & G_KEEPERR)) {
2588 /* my_exit() was called */
2589 PL_curstash = PL_defstash;
2592 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2593 Perl_croak(aTHX_ "Callback called exit");
2598 PL_op = PL_restartop;
2602 PL_stack_sp = PL_stack_base + oldmark;
2603 if ((flags & G_WANT) == G_ARRAY)
2607 *++PL_stack_sp = &PL_sv_undef;
2612 if (PL_scopestack_ix > oldscope)
2613 delete_eval_scope();
2617 if (flags & G_DISCARD) {
2618 PL_stack_sp = PL_stack_base + oldmark;
2627 /* Eval a string. The G_EVAL flag is always assumed. */
2630 =for apidoc p||eval_sv
2632 Tells Perl to C<eval> the string in the SV.
2638 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2640 /* See G_* flags in cop.h */
2644 UNOP myop; /* fake syntax tree node */
2645 VOL I32 oldmark = SP - PL_stack_base;
2648 OP* const oldop = PL_op;
2651 PERL_ARGS_ASSERT_EVAL_SV;
2653 if (flags & G_DISCARD) {
2660 Zero(PL_op, 1, UNOP);
2661 EXTEND(PL_stack_sp, 1);
2662 *++PL_stack_sp = sv;
2664 if (!(flags & G_NOARGS))
2665 myop.op_flags = OPf_STACKED;
2666 myop.op_next = NULL;
2667 myop.op_type = OP_ENTEREVAL;
2668 myop.op_flags |= OP_GIMME_REVERSE(flags);
2669 if (flags & G_KEEPERR)
2670 myop.op_flags |= OPf_SPECIAL;
2672 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2673 * before a PUSHEVAL, which corrupts the stack after a croak */
2674 TAINT_PROPER("eval_sv()");
2680 CALL_BODY_EVAL((OP*)&myop);
2681 retval = PL_stack_sp - (PL_stack_base + oldmark);
2682 if (!(flags & G_KEEPERR)) {
2690 /* my_exit() was called */
2691 PL_curstash = PL_defstash;
2694 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2695 Perl_croak(aTHX_ "Callback called exit");
2700 PL_op = PL_restartop;
2704 PL_stack_sp = PL_stack_base + oldmark;
2705 if ((flags & G_WANT) == G_ARRAY)
2709 *++PL_stack_sp = &PL_sv_undef;
2715 if (flags & G_DISCARD) {
2716 PL_stack_sp = PL_stack_base + oldmark;
2726 =for apidoc p||eval_pv
2728 Tells Perl to C<eval> the given string and return an SV* result.
2734 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2738 SV* sv = newSVpv(p, 0);
2740 PERL_ARGS_ASSERT_EVAL_PV;
2742 eval_sv(sv, G_SCALAR);
2749 if (croak_on_error && SvTRUE(ERRSV)) {
2750 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2756 /* Require a module. */
2759 =head1 Embedding Functions
2761 =for apidoc p||require_pv
2763 Tells Perl to C<require> the file named by the string argument. It is
2764 analogous to the Perl code C<eval "require '$file'">. It's even
2765 implemented that way; consider using load_module instead.
2770 Perl_require_pv(pTHX_ const char *pv)
2776 PERL_ARGS_ASSERT_REQUIRE_PV;
2778 PUSHSTACKi(PERLSI_REQUIRE);
2780 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2781 eval_sv(sv_2mortal(sv), G_DISCARD);
2787 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2789 /* This message really ought to be max 23 lines.
2790 * Removed -h because the user already knows that option. Others? */
2792 static const char * const usage_msg[] = {
2793 "-0[octal] specify record separator (\\0, if no argument)",
2794 "-a autosplit mode with -n or -p (splits $_ into @F)",
2795 "-C[number/list] enables the listed Unicode features",
2796 "-c check syntax only (runs BEGIN and CHECK blocks)",
2797 "-d[:debugger] run program under debugger",
2798 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2799 "-e program one line of program (several -e's allowed, omit programfile)",
2800 "-E program like -e, but enables all optional features",
2801 "-f don't do $sitelib/sitecustomize.pl at startup",
2802 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2803 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2804 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2805 "-l[octal] enable line ending processing, specifies line terminator",
2806 "-[mM][-]module execute \"use/no module...\" before executing program",
2807 "-n assume \"while (<>) { ... }\" loop around program",
2808 "-p assume loop like -n but print line also, like sed",
2809 "-s enable rudimentary parsing for switches after programfile",
2810 "-S look for programfile using PATH environment variable",
2811 "-t enable tainting warnings",
2812 "-T enable tainting checks",
2813 "-u dump core after parsing program",
2814 "-U allow unsafe operations",
2815 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2816 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2817 "-w enable many useful warnings (RECOMMENDED)",
2818 "-W enable all warnings",
2819 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2820 "-X disable all warnings",
2824 const char * const *p = usage_msg;
2826 PERL_ARGS_ASSERT_USAGE;
2828 PerlIO_printf(PerlIO_stdout(),
2829 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2832 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2835 /* convert a string of -D options (or digits) into an int.
2836 * sets *s to point to the char after the options */
2840 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2842 static const char * const usage_msgd[] = {
2843 " Debugging flag values: (see also -d)",
2844 " p Tokenizing and parsing (with v, displays parse stack)",
2845 " s Stack snapshots (with v, displays all stacks)",
2846 " l Context (loop) stack processing",
2847 " t Trace execution",
2848 " o Method and overloading resolution",
2849 " c String/numeric conversions",
2850 " P Print profiling info, source file input state",
2851 " m Memory and SV allocation",
2852 " f Format processing",
2853 " r Regular expression parsing and execution",
2854 " x Syntax tree dump",
2855 " u Tainting checks",
2856 " H Hash dump -- usurps values()",
2857 " X Scratchpad allocation",
2860 " R Include reference counts of dumped variables (eg when using -Ds)",
2861 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2862 " v Verbose: use in conjunction with other flags",
2864 " A Consistency checks on internal structures",
2865 " q quiet - currently only suppresses the 'EXECUTING' message",
2866 " M trace smart match resolution",
2871 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2874 /* if adding extra options, remember to update DEBUG_MASK */
2875 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqM";
2877 for (; isALNUM(**s); (*s)++) {
2878 const char * const d = strchr(debopts,**s);
2880 i |= 1 << (d - debopts);
2881 else if (ckWARN_d(WARN_DEBUGGING))
2882 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2883 "invalid option -D%c, use -D'' to see choices\n", **s);
2886 else if (isDIGIT(**s)) {
2888 for (; isALNUM(**s); (*s)++) ;
2890 else if (givehelp) {
2891 const char *const *p = usage_msgd;
2892 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2895 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2896 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2897 "-Dp not implemented on this platform\n");
2903 /* This routine handles any switches that can be given during run */
2906 Perl_moreswitches(pTHX_ const char *s)
2910 const char option = *s; /* used to remember option in -m/-M code */
2912 PERL_ARGS_ASSERT_MORESWITCHES;
2920 SvREFCNT_dec(PL_rs);
2921 if (s[1] == 'x' && s[2]) {
2922 const char *e = s+=2;
2928 flags = PERL_SCAN_SILENT_ILLDIGIT;
2929 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2930 if (s + numlen < e) {
2931 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2935 PL_rs = newSVpvs("");
2936 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2937 tmps = (U8*)SvPVX(PL_rs);
2938 uvchr_to_utf8(tmps, rschar);
2939 SvCUR_set(PL_rs, UNISKIP(rschar));
2944 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2945 if (rschar & ~((U8)~0))
2946 PL_rs = &PL_sv_undef;
2947 else if (!rschar && numlen >= 2)
2948 PL_rs = newSVpvs("");
2950 char ch = (char)rschar;
2951 PL_rs = newSVpvn(&ch, 1);
2954 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2959 PL_unicode = parse_unicode_opts( (const char **)&s );
2960 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2966 while (*s && !isSPACE(*s)) ++s;
2967 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2978 forbid_setid('d', FALSE);
2981 /* -dt indicates to the debugger that threads will be used */
2982 if (*s == 't' && !isALNUM(s[1])) {
2984 my_setenv("PERL5DB_THREADED", "1");
2987 /* The following permits -d:Mod to accepts arguments following an =
2988 in the fashion that -MSome::Mod does. */
2989 if (*s == ':' || *s == '=') {
2990 const char *start = ++s;
2991 const char *const end = s + strlen(s);
2992 SV * const sv = newSVpvs("use Devel::");
2994 /* We now allow -d:Module=Foo,Bar */
2995 while(isALNUM(*s) || *s==':') ++s;
2997 sv_catpvn(sv, start, end - start);
2999 sv_catpvn(sv, start, s-start);
3000 /* Don't use NUL as q// delimiter here, this string goes in the
3002 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3005 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3009 PL_perldb = PERLDB_ALL;
3016 forbid_setid('D', FALSE);
3018 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3019 #else /* !DEBUGGING */
3020 if (ckWARN_d(WARN_DEBUGGING))
3021 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3022 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3023 for (s++; isALNUM(*s); s++) ;
3028 usage(PL_origargv[0]);
3031 Safefree(PL_inplace);
3032 #if defined(__CYGWIN__) /* do backup extension automagically */
3033 if (*(s+1) == '\0') {
3034 PL_inplace = savepvs(".bak");
3037 #endif /* __CYGWIN__ */
3039 const char * const start = ++s;
3040 while (*s && !isSPACE(*s))
3043 PL_inplace = savepvn(start, s - start);
3047 if (*s == '-') /* Additional switches on #! line. */
3051 case 'I': /* -I handled both here and in parse_body() */
3052 forbid_setid('I', FALSE);
3054 while (*s && isSPACE(*s))
3059 /* ignore trailing spaces (possibly followed by other switches) */
3061 for (e = p; *e && !isSPACE(*e); e++) ;
3065 } while (*p && *p != '-');
3067 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3073 Perl_croak(aTHX_ "No directory specified for -I");
3079 SvREFCNT_dec(PL_ors_sv);
3085 PL_ors_sv = newSVpvs("\n");
3086 numlen = 3 + (*s == '0');
3087 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3091 if (RsPARA(PL_rs)) {
3092 PL_ors_sv = newSVpvs("\n\n");
3095 PL_ors_sv = newSVsv(PL_rs);
3100 forbid_setid('M', FALSE); /* XXX ? */
3103 forbid_setid('m', FALSE); /* XXX ? */
3108 const char *use = "use ";
3110 /* -M-foo == 'no foo' */
3111 /* Leading space on " no " is deliberate, to make both
3112 possibilities the same length. */
3113 if (*s == '-') { use = " no "; ++s; }
3114 sv = newSVpvn(use,4);
3116 /* We allow -M'Module qw(Foo Bar)' */
3117 while(isALNUM(*s) || *s==':') {
3126 Perl_croak(aTHX_ "Module name required with -%c option",
3129 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3130 "contains single ':'",
3131 (int)(s - start), start, option);
3132 end = s + strlen(s);
3134 sv_catpvn(sv, start, end - start);
3135 if (option == 'm') {
3137 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3138 sv_catpvs( sv, " ()");
3141 sv_catpvn(sv, start, s-start);
3142 /* Use NUL as q''-delimiter. */
3143 sv_catpvs(sv, " split(/,/,q\0");
3145 sv_catpvn(sv, s, end - s);
3146 sv_catpvs(sv, "\0)");
3149 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3152 Perl_croak(aTHX_ "Missing argument to -%c", option);
3163 forbid_setid('s', FALSE);
3164 PL_doswitches = TRUE;
3178 PL_do_undump = TRUE;
3186 if (!sv_derived_from(PL_patchlevel, "version"))
3187 upg_version(PL_patchlevel, TRUE);
3190 SV* level= vstringify(PL_patchlevel);
3191 #ifdef PERL_PATCHNUM
3192 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3193 SV *num = newSVpvs(PERL_PATCHNUM "*");
3195 SV *num = newSVpvs(PERL_PATCHNUM);
3198 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3199 SvREFCNT_dec(level);
3202 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3206 PerlIO_printf(PerlIO_stdout(),
3207 "\nThis is perl, %"SVf
3211 SvREFCNT_dec(level);
3214 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3215 PerlIO_printf(PerlIO_stdout(),
3216 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3217 SVfARG(vstringify(PL_patchlevel))));
3218 PerlIO_printf(PerlIO_stdout(),
3219 Perl_form(aTHX_ " built under %s at %s %s\n",
3220 OSNAME, __DATE__, __TIME__));
3221 PerlIO_printf(PerlIO_stdout(),
3222 Perl_form(aTHX_ " OS Specific Release: %s\n",
3225 #if defined(LOCAL_PATCH_COUNT)
3226 if (LOCAL_PATCH_COUNT > 0)
3227 PerlIO_printf(PerlIO_stdout(),
3228 "\n(with %d registered patch%s, "
3229 "see perl -V for more detail)",
3231 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3234 PerlIO_printf(PerlIO_stdout(),
3235 "\n\nCopyright 1987-2009, Larry Wall\n");
3237 PerlIO_printf(PerlIO_stdout(),
3238 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3241 PerlIO_printf(PerlIO_stdout(),
3242 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3243 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3246 PerlIO_printf(PerlIO_stdout(),
3247 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3248 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "atariST series port, ++jrb bammi@cadence.com\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "EPOC port by Olaf Flebbe, 1999-2002\n");
3283 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3284 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3287 #ifdef __SYMBIAN32__
3288 PerlIO_printf(PerlIO_stdout(),
3289 "Symbian port by Nokia, 2004-2005\n");
3291 #ifdef BINARY_BUILD_NOTICE
3292 BINARY_BUILD_NOTICE;
3294 PerlIO_printf(PerlIO_stdout(),
3296 Perl may be copied only under the terms of either the Artistic License or the\n\
3297 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3298 Complete documentation for Perl, including FAQ lists, should be found on\n\
3299 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3300 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3303 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3304 PL_dowarn |= G_WARN_ON;
3309 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3310 if (!specialWARN(PL_compiling.cop_warnings))
3311 PerlMemShared_free(PL_compiling.cop_warnings);
3312 PL_compiling.cop_warnings = pWARN_ALL ;
3316 PL_dowarn = G_WARN_ALL_OFF;
3317 if (!specialWARN(PL_compiling.cop_warnings))
3318 PerlMemShared_free(PL_compiling.cop_warnings);
3319 PL_compiling.cop_warnings = pWARN_NONE ;
3326 if (s[0] == '-') /* Additional switches on #! line. */
3331 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3337 #ifdef ALTERNATE_SHEBANG
3338 case 'S': /* OS/2 needs -S on "extproc" line. */
3342 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3347 /* compliments of Tom Christiansen */
3349 /* unexec() can be found in the Gnu emacs distribution */
3350 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3353 Perl_my_unexec(pTHX)
3355 PERL_UNUSED_CONTEXT;
3357 SV * prog = newSVpv(BIN_EXP, 0);
3358 SV * file = newSVpv(PL_origfilename, 0);
3362 sv_catpvs(prog, "/perl");
3363 sv_catpvs(file, ".perldump");
3365 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3366 /* unexec prints msg to stderr in case of failure */
3367 PerlProc_exit(status);
3370 # include <lib$routines.h>
3371 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3372 # elif defined(WIN32) || defined(__CYGWIN__)
3373 Perl_croak(aTHX_ "dump is not supported");
3375 ABORT(); /* for use with undump */
3380 /* initialize curinterp */
3386 # define PERLVAR(var,type)
3387 # define PERLVARA(var,n,type)
3388 # if defined(PERL_IMPLICIT_CONTEXT)
3389 # define PERLVARI(var,type,init) aTHX->var = init;
3390 # define PERLVARIC(var,type,init) aTHX->var = init;
3392 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3393 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3395 # include "intrpvar.h"
3401 # define PERLVAR(var,type)
3402 # define PERLVARA(var,n,type)
3403 # define PERLVARI(var,type,init) PL_##var = init;
3404 # define PERLVARIC(var,type,init) PL_##var = init;
3405 # include "intrpvar.h"
3412 /* As these are inside a structure, PERLVARI isn't capable of initialising
3414 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3415 PL_reg_poscache = PL_reg_starttry = NULL;
3419 S_init_main_stash(pTHX)
3424 PL_curstash = PL_defstash = newHV();
3425 /* We know that the string "main" will be in the global shared string
3426 table, so it's a small saving to use it rather than allocate another
3428 PL_curstname = newSVpvs_share("main");
3429 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3430 /* If we hadn't caused another reference to "main" to be in the shared
3431 string table above, then it would be worth reordering these two,
3432 because otherwise all we do is delete "main" from it as a consequence
3433 of the SvREFCNT_dec, only to add it again with hv_name_set */
3434 SvREFCNT_dec(GvHV(gv));
3435 hv_name_set(PL_defstash, "main", 4, 0);
3436 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3438 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3440 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3441 GvMULTI_on(PL_incgv);
3442 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3443 GvMULTI_on(PL_hintgv);
3444 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3445 SvREFCNT_inc_simple_void(PL_defgv);
3446 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3447 SvREFCNT_inc_simple_void(PL_errgv);
3448 GvMULTI_on(PL_errgv);
3449 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3450 GvMULTI_on(PL_replgv);
3451 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3452 #ifdef PERL_DONT_CREATE_GVSV
3455 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3457 PL_curstash = PL_defstash;
3458 CopSTASH_set(&PL_compiling, PL_defstash);
3459 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3460 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3462 /* We must init $/ before switches are processed. */
3463 sv_setpvs(get_sv("/", GV_ADD), "\n");
3467 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3468 bool *suidscript, PerlIO **rsfpp)
3473 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3476 PL_origfilename = savepvs("-e");
3479 /* if find_script() returns, it returns a malloc()-ed value */
3480 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3482 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3483 const char *s = scriptname + 8;
3489 * Tell apart "normal" usage of fdscript, e.g.
3490 * with bash on FreeBSD:
3491 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3492 * from usage in suidperl.
3493 * Does any "normal" usage leave garbage after the number???
3494 * Is it a mistake to use a similar /dev/fd/ construct for
3499 * Be supersafe and do some sanity-checks.
3500 * Still, can we be sure we got the right thing?
3503 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3506 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3508 scriptname = savepv(s + 1);
3509 Safefree(PL_origfilename);
3510 PL_origfilename = (char *)scriptname;
3515 CopFILE_free(PL_curcop);
3516 CopFILE_set(PL_curcop, PL_origfilename);
3517 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3518 scriptname = (char *)"";
3519 if (fdscript >= 0) {
3520 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3521 # if defined(HAS_FCNTL) && defined(F_SETFD)
3523 /* ensure close-on-exec */
3524 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3527 else if (!*scriptname) {
3528 forbid_setid(0, *suidscript);
3529 *rsfpp = PerlIO_stdin();
3532 #ifdef FAKE_BIT_BUCKET
3533 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3534 * is called) and still have the "-e" work. (Believe it or not,
3535 * a /dev/null is required for the "-e" to work because source
3536 * filter magic is used to implement it. ) This is *not* a general
3537 * replacement for a /dev/null. What we do here is create a temp
3538 * file (an empty file), open up that as the script, and then
3539 * immediately close and unlink it. Close enough for jazz. */
3540 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3541 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3542 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3543 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3544 FAKE_BIT_BUCKET_TEMPLATE
3546 const char * const err = "Failed to create a fake bit bucket";
3547 if (strEQ(scriptname, BIT_BUCKET)) {
3548 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3549 int tmpfd = mkstemp(tmpname);
3551 scriptname = tmpname;
3554 Perl_croak(aTHX_ err);
3557 scriptname = mktemp(tmpname);
3559 Perl_croak(aTHX_ err);
3564 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3565 #ifdef FAKE_BIT_BUCKET
3566 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3567 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3568 && strlen(scriptname) == sizeof(tmpname) - 1) {
3571 scriptname = BIT_BUCKET;
3573 # if defined(HAS_FCNTL) && defined(F_SETFD)
3575 /* ensure close-on-exec */
3576 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3580 /* PSz 16 Sep 03 Keep neat error message */
3582 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3584 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3585 CopFILE(PL_curcop), Strerror(errno));
3591 * I_SYSSTATVFS HAS_FSTATVFS
3593 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3594 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3595 * here so that metaconfig picks them up. */
3598 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3599 /* Don't even need this function. */
3602 S_validate_suid(pTHX_ PerlIO *rsfp)
3604 PERL_ARGS_ASSERT_VALIDATE_SUID;
3606 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3609 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3610 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3612 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3615 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3616 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3617 /* not set-id, must be wrapped */
3620 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3623 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3627 register const char *s2;
3629 PERL_ARGS_ASSERT_FIND_BEGINNING;
3631 /* skip forward in input to the real script? */
3633 while (PL_doextract) {
3634 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3635 Perl_croak(aTHX_ "No Perl script found in input\n");
3637 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3638 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3639 PL_doextract = FALSE;
3640 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3642 while (*s == ' ' || *s == '\t') s++;
3644 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3645 || s2[-1] == '_') s2--;
3646 if (strnEQ(s2-4,"perl",4))
3647 while ((s = moreswitches(s)))
3659 PL_uid = PerlProc_getuid();
3660 PL_euid = PerlProc_geteuid();
3661 PL_gid = PerlProc_getgid();
3662 PL_egid = PerlProc_getegid();
3664 PL_uid |= PL_gid << 16;
3665 PL_euid |= PL_egid << 16;
3667 /* Should not happen: */
3668 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3669 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3672 * Should go by suidscript, not uid!=euid: why disallow
3673 * system("ls") in scripts run from setuid things?
3674 * Or, is this run before we check arguments and set suidscript?
3675 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3676 * (We never have suidscript, can we be sure to have fdscript?)
3677 * Or must then go by UID checks? See comments in forbid_setid also.
3681 /* This is used very early in the lifetime of the program,
3682 * before even the options are parsed, so PL_tainting has
3683 * not been initialized properly. */
3685 Perl_doing_taint(int argc, char *argv[], char *envp[])
3687 #ifndef PERL_IMPLICIT_SYS
3688 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3689 * before we have an interpreter-- and the whole point of this
3690 * function is to be called at such an early stage. If you are on
3691 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3692 * "tainted because running with altered effective ids', you'll
3693 * have to add your own checks somewhere in here. The two most
3694 * known samples of 'implicitness' are Win32 and NetWare, neither
3695 * of which has much of concept of 'uids'. */
3696 int uid = PerlProc_getuid();
3697 int euid = PerlProc_geteuid();
3698 int gid = PerlProc_getgid();
3699 int egid = PerlProc_getegid();
3706 if (uid && (euid != uid || egid != gid))
3708 #endif /* !PERL_IMPLICIT_SYS */
3709 /* This is a really primitive check; environment gets ignored only
3710 * if -T are the first chars together; otherwise one gets
3711 * "Too late" message. */
3712 if ( argc > 1 && argv[1][0] == '-'
3713 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3718 /* Passing the flag as a single char rather than a string is a slight space
3719 optimisation. The only message that isn't /^-.$/ is
3720 "program input from stdin", which is substituted in place of '\0', which
3721 could never be a command line flag. */
3723 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3726 char string[3] = "-x";
3727 const char *message = "program input from stdin";
3734 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3735 if (PL_euid != PL_uid)
3736 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3737 if (PL_egid != PL_gid)
3738 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3739 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3741 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3745 Perl_init_debugger(pTHX)
3748 HV * const ostash = PL_curstash;
3750 PL_curstash = PL_debstash;
3751 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3753 AvREAL_off(PL_dbargs);
3754 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3755 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3756 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3757 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3758 sv_setiv(PL_DBsingle, 0);
3759 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3760 sv_setiv(PL_DBtrace, 0);
3761 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3762 sv_setiv(PL_DBsignal, 0);
3763 PL_curstash = ostash;
3766 #ifndef STRESS_REALLOC
3767 #define REASONABLE(size) (size)
3769 #define REASONABLE(size) (1) /* unreasonable */
3773 Perl_init_stacks(pTHX)
3776 /* start with 128-item stack and 8K cxstack */
3777 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3778 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3779 PL_curstackinfo->si_type = PERLSI_MAIN;
3780 PL_curstack = PL_curstackinfo->si_stack;
3781 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3783 PL_stack_base = AvARRAY(PL_curstack);
3784 PL_stack_sp = PL_stack_base;
3785 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3787 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3790 PL_tmps_max = REASONABLE(128);
3792 Newx(PL_markstack,REASONABLE(32),I32);
3793 PL_markstack_ptr = PL_markstack;
3794 PL_markstack_max = PL_markstack + REASONABLE(32);
3798 Newx(PL_scopestack,REASONABLE(32),I32);
3799 PL_scopestack_ix = 0;
3800 PL_scopestack_max = REASONABLE(32);
3802 Newx(PL_savestack,REASONABLE(128),ANY);
3803 PL_savestack_ix = 0;
3804 PL_savestack_max = REASONABLE(128);
3813 while (PL_curstackinfo->si_next)
3814 PL_curstackinfo = PL_curstackinfo->si_next;
3815 while (PL_curstackinfo) {
3816 PERL_SI *p = PL_curstackinfo->si_prev;
3817 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3818 Safefree(PL_curstackinfo->si_cxstack);
3819 Safefree(PL_curstackinfo);
3820 PL_curstackinfo = p;
3822 Safefree(PL_tmps_stack);
3823 Safefree(PL_markstack);
3824 Safefree(PL_scopestack);
3825 Safefree(PL_savestack);
3830 S_init_predump_symbols(pTHX)
3836 sv_setpvs(get_sv("\"", GV_ADD), " ");
3837 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3839 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3840 GvMULTI_on(PL_stdingv);
3841 io = GvIOp(PL_stdingv);
3842 IoTYPE(io) = IoTYPE_RDONLY;
3843 IoIFP(io) = PerlIO_stdin();
3844 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3846 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3848 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3851 IoTYPE(io) = IoTYPE_WRONLY;
3852 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3854 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3856 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3858 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3859 GvMULTI_on(PL_stderrgv);
3860 io = GvIOp(PL_stderrgv);
3861 IoTYPE(io) = IoTYPE_WRONLY;
3862 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3863 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3865 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3867 PL_statname = newSV(0); /* last filename we did stat on */
3869 Safefree(PL_osname);
3870 PL_osname = savepv(OSNAME);
3874 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3878 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3880 argc--,argv++; /* skip name of script */
3881 if (PL_doswitches) {
3882 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3886 if (argv[0][1] == '-' && !argv[0][2]) {
3890 if ((s = strchr(argv[0], '='))) {
3891 const char *const start_name = argv[0] + 1;
3892 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3893 TRUE, SVt_PV)), s + 1);
3896 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3899 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3900 GvMULTI_on(PL_argvgv);
3901 (void)gv_AVadd(PL_argvgv);
3902 av_clear(GvAVn(PL_argvgv));
3903 for (; argc > 0; argc--,argv++) {
3904 SV * const sv = newSVpv(argv[0],0);
3905 av_push(GvAVn(PL_argvgv),sv);
3906 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3907 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3910 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3911 (void)sv_utf8_decode(sv);
3917 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3922 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3924 PL_toptarget = newSV_type(SVt_PVFM);
3925 sv_setpvs(PL_toptarget, "");
3926 PL_bodytarget = newSV_type(SVt_PVFM);
3927 sv_setpvs(PL_bodytarget, "");
3928 PL_formtarget = PL_bodytarget;
3932 init_argv_symbols(argc,argv);
3934 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3935 sv_setpv(GvSV(tmpgv),PL_origfilename);
3937 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3939 bool env_is_not_environ;
3940 GvMULTI_on(PL_envgv);
3941 hv = GvHVn(PL_envgv);
3942 hv_magic(hv, NULL, PERL_MAGIC_env);
3944 #ifdef USE_ENVIRON_ARRAY
3945 /* Note that if the supplied env parameter is actually a copy
3946 of the global environ then it may now point to free'd memory
3947 if the environment has been modified since. To avoid this
3948 problem we treat env==NULL as meaning 'use the default'
3952 env_is_not_environ = env != environ;
3953 if (env_is_not_environ
3954 # ifdef USE_ITHREADS
3955 && PL_curinterp == aTHX
3964 for (; *env; env++) {
3967 if (!(s = strchr(old_var,'=')) || s == old_var)
3970 #if defined(MSDOS) && !defined(DJGPP)
3972 (void)strupr(old_var);
3975 sv = newSVpv(s+1, 0);
3976 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3977 if (env_is_not_environ)
3981 #endif /* USE_ENVIRON_ARRAY */
3982 #endif /* !PERL_MICRO */
3985 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3986 SvREADONLY_off(GvSV(tmpgv));
3987 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
3988 SvREADONLY_on(GvSV(tmpgv));
3990 #ifdef THREADS_HAVE_PIDS
3991 PL_ppid = (IV)getppid();
3994 /* touch @F array to prevent spurious warnings 20020415 MJD */
3996 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4001 S_init_perllib(pTHX)
4005 const char *perl5lib = NULL;
4014 perl5lib = PerlEnv_getenv("PERL5LIB");
4016 * It isn't possible to delete an environment variable with
4017 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4018 * case we treat PERL5LIB as undefined if it has a zero-length value.
4020 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4021 if (perl5lib && *perl5lib != '\0')
4025 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4027 s = PerlEnv_getenv("PERLLIB");
4029 incpush_use_sep(s, 0, 0);
4032 /* Treat PERL5?LIB as a possible search list logical name -- the
4033 * "natural" VMS idiom for a Unix path string. We allow each
4034 * element to be a set of |-separated directories for compatibility.
4038 if (my_trnlnm("PERL5LIB",buf,0))
4040 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4041 } while (my_trnlnm("PERL5LIB",buf,++idx));
4043 while (my_trnlnm("PERLLIB",buf,idx++))
4044 incpush_use_sep(buf, 0, 0);
4049 /* Use the ~-expanded versions of APPLLIB (undocumented),
4050 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4053 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4054 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4058 /* sitearch is always relative to sitelib on Windows for
4059 * DLL-based path intuition to work correctly */
4060 # if !defined(WIN32)
4061 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4062 INCPUSH_CAN_RELOCATE);
4068 /* this picks up sitearch as well */
4069 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4071 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4073 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4077 #ifdef PERL_VENDORARCH_EXP
4078 /* vendorarch is always relative to vendorlib on Windows for
4079 * DLL-based path intuition to work correctly */
4080 # if !defined(WIN32)
4081 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4082 INCPUSH_CAN_RELOCATE);
4086 #ifdef PERL_VENDORLIB_EXP
4088 /* this picks up vendorarch as well */
4089 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4091 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4093 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4094 INCPUSH_CAN_RELOCATE);
4099 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4103 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4107 s = win32_get_privlib(PERL_FS_VERSION, &len);
4109 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4112 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4114 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4118 #ifdef PERL_OTHERLIBDIRS
4119 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4120 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4121 |INCPUSH_CAN_RELOCATE);
4127 * It isn't possible to delete an environment variable with
4128 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4129 * case we treat PERL5LIB as undefined if it has a zero-length value.
4131 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4132 if (perl5lib && *perl5lib != '\0')
4136 incpush_use_sep(perl5lib, 0,
4137 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4139 /* Treat PERL5?LIB as a possible search list logical name -- the
4140 * "natural" VMS idiom for a Unix path string. We allow each
4141 * element to be a set of |-separated directories for compatibility.
4145 if (my_trnlnm("PERL5LIB",buf,0))
4147 incpush_use_sep(buf, 0,
4148 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4149 } while (my_trnlnm("PERL5LIB",buf,++idx));
4153 /* Use the ~-expanded versions of APPLLIB (undocumented),
4154 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4157 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4158 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4161 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4162 /* Search for version-specific dirs below here */
4163 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4164 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4168 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4169 /* Search for version-specific dirs below here */
4170 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4171 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4174 #ifdef PERL_OTHERLIBDIRS
4175 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4176 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4177 |INCPUSH_CAN_RELOCATE);
4181 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4184 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4185 # define PERLLIB_SEP ';'
4188 # define PERLLIB_SEP '|'
4190 # define PERLLIB_SEP ':'
4193 #ifndef PERLLIB_MANGLE
4194 # define PERLLIB_MANGLE(s,n) (s)
4197 /* Push a directory onto @INC if it exists.
4198 Generate a new SV if we do this, to save needing to copy the SV we push
4201 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4206 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4208 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4209 S_ISDIR(tmpstatbuf.st_mode)) {
4211 dir = newSVsv(stem);
4213 /* Truncate dir back to stem. */
4214 SvCUR_set(dir, SvCUR(stem));
4220 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4223 const U8 using_sub_dirs
4224 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4225 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4226 const U8 add_versioned_sub_dirs
4227 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4228 const U8 add_archonly_sub_dirs
4229 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4230 #ifdef PERL_INC_VERSION_LIST
4231 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4233 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4234 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4235 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4236 AV *const inc = GvAVn(PL_incgv);
4238 PERL_ARGS_ASSERT_INCPUSH;
4241 /* Could remove this vestigial extra block, if we don't mind a lot of
4242 re-indenting diff noise. */
4245 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4246 arranged to unshift #! line -I onto the front of @INC. However,
4247 -I can add version and architecture specific libraries, and they
4248 need to go first. The old code assumed that it was always
4249 pushing. Hence to make it work, need to push the architecture
4250 (etc) libraries onto a temporary array, then "unshift" that onto
4251 the front of @INC. */
4252 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4255 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4256 defined to so something (in os2/os2.c), but the code has been
4257 this way, ignoring any possible changed of length, since
4258 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4260 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4262 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4265 /* Do the if() outside the #ifdef to avoid warnings about an unused
4268 #ifdef PERL_RELOCATABLE_INC
4270 * Relocatable include entries are marked with a leading .../
4273 * 0: Remove that leading ".../"
4274 * 1: Remove trailing executable name (anything after the last '/')
4275 * from the perl path to give a perl prefix
4277 * While the @INC element starts "../" and the prefix ends with a real
4278 * directory (ie not . or ..) chop that real directory off the prefix
4279 * and the leading "../" from the @INC element. ie a logical "../"
4281 * Finally concatenate the prefix and the remainder of the @INC element
4282 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4283 * generates /usr/local/lib/perl5
4285 const char *libpath = SvPVX(libdir);
4286 STRLEN libpath_len = SvCUR(libdir);
4287 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4289 SV * const caret_X = get_sv("\030", 0);
4290 /* Going to use the SV just as a scratch buffer holding a C
4296 /* $^X is *the* source of taint if tainting is on, hence
4297 SvPOK() won't be true. */
4299 assert(SvPOKp(caret_X));
4300 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4302 /* Firstly take off the leading .../
4303 If all else fail we'll do the paths relative to the current
4305 sv_chop(libdir, libpath + 4);
4306 /* Don't use SvPV as we're intentionally bypassing taining,
4307 mortal copies that the mg_get of tainting creates, and
4308 corruption that seems to come via the save stack.
4309 I guess that the save stack isn't correctly set up yet. */
4310 libpath = SvPVX(libdir);
4311 libpath_len = SvCUR(libdir);
4313 /* This would work more efficiently with memrchr, but as it's
4314 only a GNU extension we'd need to probe for it and
4315 implement our own. Not hard, but maybe not worth it? */
4317 prefix = SvPVX(prefix_sv);
4318 lastslash = strrchr(prefix, '/');
4320 /* First time in with the *lastslash = '\0' we just wipe off
4321 the trailing /perl from (say) /usr/foo/bin/perl
4325 while ((*lastslash = '\0'), /* Do that, come what may. */
4326 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4327 && (lastslash = strrchr(prefix, '/')))) {
4328 if (lastslash[1] == '\0'
4329 || (lastslash[1] == '.'
4330 && (lastslash[2] == '/' /* ends "/." */
4331 || (lastslash[2] == '/'
4332 && lastslash[3] == '/' /* or "/.." */
4334 /* Prefix ends "/" or "/." or "/..", any of which
4335 are fishy, so don't do any more logical cleanup.
4339 /* Remove leading "../" from path */
4342 /* Next iteration round the loop removes the last
4343 directory name from prefix by writing a '\0' in
4344 the while clause. */
4346 /* prefix has been terminated with a '\0' to the correct
4347 length. libpath points somewhere into the libdir SV.
4348 We need to join the 2 with '/' and drop the result into
4350 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4351 SvREFCNT_dec(libdir);
4352 /* And this is the new libdir. */
4355 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4356 /* Need to taint reloccated paths if running set ID */
4357 SvTAINTED_on(libdir);
4360 SvREFCNT_dec(prefix_sv);
4365 * BEFORE pushing libdir onto @INC we may first push version- and
4366 * archname-specific sub-directories.
4368 if (using_sub_dirs) {
4370 #ifdef PERL_INC_VERSION_LIST
4371 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4372 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4373 const char * const *incver;
4380 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4382 while (unix[len-1] == '/') len--; /* Cosmetic */
4383 sv_usepvn(libdir,unix,len);
4386 PerlIO_printf(Perl_error_log,
4387 "Failed to unixify @INC element \"%s\"\n",
4391 subdir = newSVsv(libdir);
4393 if (add_versioned_sub_dirs) {
4394 /* .../version/archname if -d .../version/archname */
4395 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4396 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4398 /* .../version if -d .../version */
4399 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4400 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4403 #ifdef PERL_INC_VERSION_LIST
4405 for (incver = incverlist; *incver; incver++) {
4406 /* .../xxx if -d .../xxx */
4407 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4408 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4413 if (add_archonly_sub_dirs) {
4414 /* .../archname if -d .../archname */
4415 sv_catpvs(subdir, "/" ARCHNAME);
4416 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4420 assert (SvREFCNT(subdir) == 1);
4421 SvREFCNT_dec(subdir);
4424 /* finally add this lib directory at the end of @INC */
4426 U32 extra = av_len(av) + 1;
4427 av_unshift(inc, extra + push_basedir);
4429 av_store(inc, extra, libdir);
4431 /* av owns a reference, av_store() expects to be donated a
4432 reference, and av expects to be sane when it's cleared.
4433 If I wanted to be naughty and wrong, I could peek inside the
4434 implementation of av_clear(), realise that it uses
4435 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4436 and so directly steal from it (with a memcpy() to inc, and
4437 then memset() to NULL them out. But people copy code from the
4438 core expecting it to be best practise, so let's use the API.
4439 Although studious readers will note that I'm not checking any
4441 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4445 else if (push_basedir) {
4446 av_push(inc, libdir);
4449 if (!push_basedir) {
4450 assert (SvREFCNT(libdir) == 1);
4451 SvREFCNT_dec(libdir);
4457 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4461 /* This logic has been broken out from S_incpush(). It may be possible to
4464 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4471 /* Break at all separators */
4472 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4474 /* skip any consecutive separators */
4476 /* Uncomment the next line for PATH semantics */
4477 /* But you'll need to write tests */
4478 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4480 incpush(p, (STRLEN)(s - p), flags);
4485 incpush(p, (STRLEN)(end - p), flags);
4490 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4494 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4500 PERL_ARGS_ASSERT_CALL_LIST;
4502 while (av_len(paramList) >= 0) {
4503 cv = MUTABLE_CV(av_shift(paramList));
4505 if (paramList == PL_beginav) {
4506 /* save PL_beginav for compiler */
4507 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4509 else if (paramList == PL_checkav) {
4510 /* save PL_checkav for compiler */
4511 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4513 else if (paramList == PL_unitcheckav) {
4514 /* save PL_unitcheckav for compiler */
4515 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4526 PL_madskills |= 16384;
4531 PL_madskills &= ~16384;
4534 (void)SvPV_const(atsv, len);
4536 PL_curcop = &PL_compiling;
4537 CopLINE_set(PL_curcop, oldline);
4538 if (paramList == PL_beginav)
4539 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4541 Perl_sv_catpvf(aTHX_ atsv,
4542 "%s failed--call queue aborted",
4543 paramList == PL_checkav ? "CHECK"
4544 : paramList == PL_initav ? "INIT"
4545 : paramList == PL_unitcheckav ? "UNITCHECK"
4547 while (PL_scopestack_ix > oldscope)
4550 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4557 /* my_exit() was called */
4558 while (PL_scopestack_ix > oldscope)
4561 PL_curstash = PL_defstash;
4562 PL_curcop = &PL_compiling;
4563 CopLINE_set(PL_curcop, oldline);
4565 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4566 if (paramList == PL_beginav)
4567 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4569 Perl_croak(aTHX_ "%s failed--call queue aborted",
4570 paramList == PL_checkav ? "CHECK"
4571 : paramList == PL_initav ? "INIT"
4572 : paramList == PL_unitcheckav ? "UNITCHECK"
4579 PL_curcop = &PL_compiling;
4580 CopLINE_set(PL_curcop, oldline);
4583 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4592 Perl_my_exit(pTHX_ U32 status)
4603 STATUS_EXIT_SET(status);
4610 Perl_my_failure_exit(pTHX)
4614 /* We have been called to fall on our sword. The desired exit code
4615 * should be already set in STATUS_UNIX, but could be shifted over
4616 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4619 * If an error code has not been set, then force the issue.
4621 if (MY_POSIX_EXIT) {
4623 /* According to the die_exit.t tests, if errno is non-zero */
4624 /* It should be used for the error status. */
4626 if (errno == EVMSERR) {
4627 STATUS_NATIVE = vaxc$errno;
4630 /* According to die_exit.t tests, if the child_exit code is */
4631 /* also zero, then we need to exit with a code of 255 */
4632 if ((errno != 0) && (errno < 256))
4633 STATUS_UNIX_EXIT_SET(errno);
4634 else if (STATUS_UNIX < 255) {
4635 STATUS_UNIX_EXIT_SET(255);
4640 /* The exit code could have been set by $? or vmsish which
4641 * means that it may not have fatal set. So convert
4642 * success/warning codes to fatal with out changing
4643 * the POSIX status code. The severity makes VMS native
4644 * status handling work, while UNIX mode programs use the
4645 * the POSIX exit codes.
4647 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4648 STATUS_NATIVE &= STS$M_COND_ID;
4649 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4653 /* Traditionally Perl on VMS always expects a Fatal Error. */
4654 if (vaxc$errno & 1) {
4656 /* So force success status to failure */
4657 if (STATUS_NATIVE & 1)
4662 STATUS_UNIX = EINTR; /* In case something cares */
4667 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4669 /* Encode the severity code */
4670 severity = STATUS_NATIVE & STS$M_SEVERITY;
4671 STATUS_UNIX = (severity ? severity : 1) << 8;
4673 /* Perl expects this to be a fatal error */
4674 if (severity != STS$K_SEVERE)
4683 STATUS_UNIX_SET(errno);
4685 exitstatus = STATUS_UNIX >> 8;
4686 if (exitstatus & 255)
4687 STATUS_UNIX_SET(exitstatus);
4689 STATUS_UNIX_SET(255);
4696 S_my_exit_jump(pTHX)
4701 SvREFCNT_dec(PL_e_script);
4705 POPSTACK_TO(PL_mainstack);
4713 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4716 const char * const p = SvPVX_const(PL_e_script);
4717 const char *nl = strchr(p, '\n');
4719 PERL_UNUSED_ARG(idx);
4720 PERL_UNUSED_ARG(maxlen);
4722 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4724 filter_del(read_e_script);
4727 sv_catpvn(buf_sv, p, nl-p);
4728 sv_chop(PL_e_script, nl);
4734 * c-indentation-style: bsd
4736 * indent-tabs-mode: t
4739 * ex: set ts=8 sts=4 sw=4 noet: