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_ptr);
1232 PL_psig_ptr = (SV**)NULL;
1233 Safefree(PL_psig_name);
1234 PL_psig_name = (SV**)NULL;
1235 Safefree(PL_bitcount);
1237 Safefree(PL_psig_pend);
1238 PL_psig_pend = (int*)NULL;
1241 PL_tainting = FALSE;
1242 PL_taint_warn = FALSE;
1243 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1246 DEBUG_P(debprofdump());
1248 #ifdef USE_REENTRANT_API
1249 Perl_reentrant_free(aTHX);
1254 while (PL_regmatch_slab) {
1255 regmatch_slab *s = PL_regmatch_slab;
1256 PL_regmatch_slab = PL_regmatch_slab->next;
1260 /* As the absolutely last thing, free the non-arena SV for mess() */
1263 /* we know that type == SVt_PVMG */
1265 /* it could have accumulated taint magic */
1268 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1269 moremagic = mg->mg_moremagic;
1270 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1272 Safefree(mg->mg_ptr);
1276 /* we know that type >= SVt_PV */
1277 SvPV_free(PL_mess_sv);
1278 Safefree(SvANY(PL_mess_sv));
1279 Safefree(PL_mess_sv);
1286 =for apidoc perl_free
1288 Releases a Perl interpreter. See L<perlembed>.
1298 PERL_ARGS_ASSERT_PERL_FREE;
1300 if (PL_veto_cleanup)
1303 #ifdef PERL_TRACK_MEMPOOL
1306 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1307 * value as we're probably hunting memory leaks then
1309 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1310 if (!s || atoi(s) == 0) {
1311 const U32 old_debug = PL_debug;
1312 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1313 thread at thread exit. */
1315 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1316 "free this thread's memory\n");
1317 PL_debug &= ~ DEBUG_m_FLAG;
1319 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1320 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1321 PL_debug = old_debug;
1326 #if defined(WIN32) || defined(NETWARE)
1327 # if defined(PERL_IMPLICIT_SYS)
1330 void *host = nw_internal_host;
1332 void *host = w32_internal_host;
1334 PerlMem_free(aTHXx);
1336 nw_delete_internal_host(host);
1338 win32_delete_internal_host(host);
1342 PerlMem_free(aTHXx);
1345 PerlMem_free(aTHXx);
1349 #if defined(USE_ITHREADS)
1350 /* provide destructors to clean up the thread key when libperl is unloaded */
1351 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1353 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1354 #pragma fini "perl_fini"
1355 #elif defined(__sun) && !defined(__GNUC__)
1356 #pragma fini (perl_fini)
1360 #if defined(__GNUC__)
1361 __attribute__((destructor))
1366 if (PL_curinterp && !PL_veto_cleanup)
1371 #endif /* THREADS */
1374 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1377 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1378 PL_exitlist[PL_exitlistlen].fn = fn;
1379 PL_exitlist[PL_exitlistlen].ptr = ptr;
1383 #ifdef HAS_PROCSELFEXE
1384 /* This is a function so that we don't hold on to MAXPATHLEN
1385 bytes of stack longer than necessary
1388 S_procself_val(pTHX_ SV *sv, const char *arg0)
1390 char buf[MAXPATHLEN];
1391 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1393 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1394 includes a spurious NUL which will cause $^X to fail in system
1395 or backticks (this will prevent extensions from being built and
1396 many tests from working). readlink is not meant to add a NUL.
1397 Normal readlink works fine.
1399 if (len > 0 && buf[len-1] == '\0') {
1403 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1404 returning the text "unknown" from the readlink rather than the path
1405 to the executable (or returning an error from the readlink). Any valid
1406 path has a '/' in it somewhere, so use that to validate the result.
1407 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1409 if (len > 0 && memchr(buf, '/', len)) {
1410 sv_setpvn(sv,buf,len);
1416 #endif /* HAS_PROCSELFEXE */
1419 S_set_caret_X(pTHX) {
1421 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1423 #ifdef HAS_PROCSELFEXE
1424 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1427 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1429 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1436 =for apidoc perl_parse
1438 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1444 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1451 PERL_ARGS_ASSERT_PERL_PARSE;
1452 #ifndef MULTIPLICITY
1453 PERL_UNUSED_ARG(my_perl);
1456 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1457 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1458 * This MUST be done before any hash stores or fetches take place.
1459 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1460 * yourself, it is your responsibility to provide a good random seed!
1461 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1462 if (!PL_rehash_seed_set)
1463 PL_rehash_seed = get_hash_seed();
1465 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1467 if (s && (atoi(s) == 1))
1468 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1470 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1475 if (PL_origalen != 0) {
1476 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1479 /* Set PL_origalen be the sum of the contiguous argv[]
1480 * elements plus the size of the env in case that it is
1481 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1482 * as the maximum modifiable length of $0. In the worst case
1483 * the area we are able to modify is limited to the size of
1484 * the original argv[0]. (See below for 'contiguous', though.)
1486 const char *s = NULL;
1489 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1490 /* Do the mask check only if the args seem like aligned. */
1492 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1494 /* See if all the arguments are contiguous in memory. Note
1495 * that 'contiguous' is a loose term because some platforms
1496 * align the argv[] and the envp[]. If the arguments look
1497 * like non-aligned, assume that they are 'strictly' or
1498 * 'traditionally' contiguous. If the arguments look like
1499 * aligned, we just check that they are within aligned
1500 * PTRSIZE bytes. As long as no system has something bizarre
1501 * like the argv[] interleaved with some other data, we are
1502 * fine. (Did I just evoke Murphy's Law?) --jhi */
1503 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1505 for (i = 1; i < PL_origargc; i++) {
1506 if ((PL_origargv[i] == s + 1
1508 || PL_origargv[i] == s + 2
1513 (PL_origargv[i] > s &&
1515 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1526 #ifndef PERL_USE_SAFE_PUTENV
1527 /* Can we grab env area too to be used as the area for $0? */
1528 if (s && PL_origenviron && !PL_use_safe_putenv) {
1529 if ((PL_origenviron[0] == s + 1)
1532 (PL_origenviron[0] > s &&
1533 PL_origenviron[0] <=
1534 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1537 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1538 s = PL_origenviron[0];
1541 my_setenv("NoNe SuCh", NULL);
1542 /* Force copy of environment. */
1543 for (i = 1; PL_origenviron[i]; i++) {
1544 if (PL_origenviron[i] == s + 1
1547 (PL_origenviron[i] > s &&
1548 PL_origenviron[i] <=
1549 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1552 s = PL_origenviron[i];
1560 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1562 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1567 /* Come here if running an undumped a.out. */
1569 PL_origfilename = savepv(argv[0]);
1570 PL_do_undump = FALSE;
1571 cxstack_ix = -1; /* start label stack again */
1573 assert (!PL_tainted);
1575 S_set_caret_X(aTHX);
1577 init_postdump_symbols(argc,argv,env);
1582 op_free(PL_main_root);
1583 PL_main_root = NULL;
1585 PL_main_start = NULL;
1586 SvREFCNT_dec(PL_main_cv);
1590 oldscope = PL_scopestack_ix;
1591 PL_dowarn = G_WARN_OFF;
1596 parse_body(env,xsinit);
1598 call_list(oldscope, PL_unitcheckav);
1600 call_list(oldscope, PL_checkav);
1607 /* my_exit() was called */
1608 while (PL_scopestack_ix > oldscope)
1611 PL_curstash = PL_defstash;
1613 call_list(oldscope, PL_unitcheckav);
1615 call_list(oldscope, PL_checkav);
1619 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1627 #define INCPUSH_UNSHIFT 0x01
1628 #define INCPUSH_ADD_OLD_VERS 0x02
1629 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1630 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1631 #define INCPUSH_NOT_BASEDIR 0x10
1632 #define INCPUSH_CAN_RELOCATE 0x20
1633 #define INCPUSH_ADD_SUB_DIRS \
1634 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1637 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1641 int argc = PL_origargc;
1642 char **argv = PL_origargv;
1643 const char *scriptname = NULL;
1644 VOL bool dosearch = FALSE;
1646 const char *cddir = NULL;
1647 #ifdef USE_SITECUSTOMIZE
1648 bool minus_f = FALSE;
1650 SV *linestr_sv = newSV_type(SVt_PVIV);
1651 bool add_read_e_script = FALSE;
1653 SvGROW(linestr_sv, 80);
1654 sv_setpvs(linestr_sv,"");
1660 for (argc--,argv++; argc > 0; argc--,argv++) {
1661 if (argv[0][0] != '-' || !argv[0][1])
1667 #ifndef PERL_STRICT_CR
1691 if ((s = moreswitches(s)))
1696 CHECK_MALLOC_TOO_LATE_FOR('t');
1697 if( !PL_tainting ) {
1698 PL_taint_warn = TRUE;
1704 CHECK_MALLOC_TOO_LATE_FOR('T');
1706 PL_taint_warn = FALSE;
1714 forbid_setid('e', FALSE);
1716 PL_e_script = newSVpvs("");
1717 add_read_e_script = TRUE;
1720 sv_catpv(PL_e_script, s);
1722 sv_catpv(PL_e_script, argv[1]);
1726 Perl_croak(aTHX_ "No code specified for -%c", c);
1727 sv_catpvs(PL_e_script, "\n");
1731 #ifdef USE_SITECUSTOMIZE
1737 case 'I': /* -I handled both here and in moreswitches() */
1738 forbid_setid('I', FALSE);
1739 if (!*++s && (s=argv[1]) != NULL) {
1743 STRLEN len = strlen(s);
1744 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1747 Perl_croak(aTHX_ "No directory specified for -I");
1750 forbid_setid('S', FALSE);
1758 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1760 /* Can't do newSVpvs() as that would involve pre-processor
1761 condititionals inside a macro expansion. */
1762 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1769 # ifdef PERL_DONT_CREATE_GVSV
1770 " PERL_DONT_CREATE_GVSV"
1772 # ifdef PERL_MALLOC_WRAP
1775 # ifdef PERL_MEM_LOG
1778 # ifdef PERL_MEM_LOG_ENV
1781 # ifdef PERL_MEM_LOG_ENV_FD
1782 " PERL_MEM_LOG_ENV_FD"
1784 # ifdef PERL_MEM_LOG_STDERR
1785 " PERL_MEM_LOG_STDERR"
1787 # ifdef PERL_MEM_LOG_TIMESTAMP
1788 " PERL_MEM_LOG_TIMESTAMP"
1790 # ifdef PERL_USE_DEVEL
1793 # ifdef PERL_USE_SAFE_PUTENV
1794 " PERL_USE_SAFE_PUTENV"
1796 # ifdef USE_SITECUSTOMIZE
1797 " USE_SITECUSTOMIZE"
1799 # ifdef USE_FAST_STDIO
1804 sv_catpv(opts_prog, PL_bincompat_options);
1805 /* Terminate the qw(, and then wrap at 76 columns. */
1806 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1808 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1812 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1814 #if defined(LOCAL_PATCH_COUNT)
1815 if (LOCAL_PATCH_COUNT > 0) {
1817 sv_catpvs(opts_prog,
1818 "\" Locally applied patches:\\n\",");
1819 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1820 if (PL_localpatches[i])
1821 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1822 0, PL_localpatches[i], 0);
1826 Perl_sv_catpvf(aTHX_ opts_prog,
1827 "\" Built under %s\\n",OSNAME);
1830 sv_catpvs(opts_prog,
1831 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1833 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1836 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1837 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1838 "sort grep {/^PERL/} keys %ENV; ");
1840 sv_catpvs(opts_prog,
1841 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1843 sv_catpvs(opts_prog,
1844 "print \" \\%ENV:\\n @env\\n\" if @env;"
1845 "print \" \\@INC:\\n @INC\\n\";");
1849 opts_prog = Perl_newSVpvf(aTHX_
1850 "Config::config_vars(qw%c%s%c)",
1854 av_push(PL_preambleav, opts_prog);
1855 /* don't look for script or read stdin */
1856 scriptname = BIT_BUCKET;
1860 PL_doextract = TRUE;
1868 if (!*++s || isSPACE(*s)) {
1872 /* catch use of gnu style long options */
1873 if (strEQ(s, "version")) {
1877 if (strEQ(s, "help")) {
1884 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1895 #ifndef SECURE_INTERNAL_GETENV
1898 (s = PerlEnv_getenv("PERL5OPT")))
1902 if (*s == '-' && *(s+1) == 'T') {
1903 CHECK_MALLOC_TOO_LATE_FOR('T');
1905 PL_taint_warn = FALSE;
1908 char *popt_copy = NULL;
1921 if (!strchr("CDIMUdmtwW", *s))
1922 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1926 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1927 s = popt_copy + (s - d);
1935 if( !PL_tainting ) {
1936 PL_taint_warn = TRUE;
1947 #ifdef USE_SITECUSTOMIZE
1949 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1950 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1955 scriptname = argv[0];
1958 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1960 else if (scriptname == NULL) {
1962 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1968 /* Set $^X early so that it can be used for relocatable paths in @INC */
1969 assert (!PL_tainted);
1971 S_set_caret_X(aTHX);
1976 bool suidscript = FALSE;
1978 open_script(scriptname, dosearch, &suidscript, &rsfp);
1980 validate_suid(validarg, scriptname, fdscript, suidscript,
1984 # if defined(SIGCHLD) || defined(SIGCLD)
1987 # define SIGCHLD SIGCLD
1989 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1990 if (sigstate == (Sighandler_t) SIG_IGN) {
1991 if (ckWARN(WARN_SIGNAL))
1992 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1993 "Can't ignore signal CHLD, forcing to default");
1994 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2002 /* This will croak if suidscript is true, as -x cannot be used with
2004 forbid_setid('x', suidscript);
2005 /* Hence you can't get here if suidscript is true */
2007 find_beginning(linestr_sv, rsfp);
2008 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2009 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2013 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2014 CvUNIQUE_on(PL_compcv);
2016 CvPADLIST(PL_compcv) = pad_new(0);
2018 PL_isarev = newHV();
2021 boot_core_UNIVERSAL();
2025 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2027 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2033 # ifdef HAS_SOCKS5_INIT
2034 socks5_init(argv[0]);
2040 init_predump_symbols();
2041 /* init_postdump_symbols not currently designed to be called */
2042 /* more than once (ENV isn't cleared first, for example) */
2043 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2045 init_postdump_symbols(argc,argv,env);
2047 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2048 * or explicitly in some platforms.
2049 * locale.c:Perl_init_i18nl10n() if the environment
2050 * look like the user wants to use UTF-8. */
2051 #if defined(__SYMBIAN32__)
2052 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2055 /* Requires init_predump_symbols(). */
2056 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2061 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2062 * and the default open disciplines. */
2063 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2064 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2066 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2067 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2068 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2070 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2071 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2072 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2074 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2075 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2076 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2078 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2079 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2082 sv_setpvs(sv, ":utf8\0:utf8");
2084 sv_setpvs(sv, ":utf8\0");
2087 sv_setpvs(sv, "\0:utf8");
2095 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2096 if (strEQ(s, "unsafe"))
2097 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2098 else if (strEQ(s, "safe"))
2099 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2101 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2108 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2112 PL_xmlfp = PerlIO_stdout();
2114 PL_xmlfp = PerlIO_open(s, "w");
2116 Perl_croak(aTHX_ "Can't open %s", s);
2118 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2124 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2125 PL_madskills = atoi(s);
2126 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2131 lex_start(linestr_sv, rsfp, TRUE);
2132 PL_subname = newSVpvs("main");
2134 if (add_read_e_script)
2135 filter_add(read_e_script, NULL);
2137 /* now parse the script */
2139 SETERRNO(0,SS_NORMAL);
2140 if (yyparse() || PL_parser->error_count) {
2142 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2144 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2148 CopLINE_set(PL_curcop, 0);
2149 PL_curstash = PL_defstash;
2151 SvREFCNT_dec(PL_e_script);
2159 SAVECOPFILE(PL_curcop);
2160 SAVECOPLINE(PL_curcop);
2161 gv_check(PL_defstash);
2170 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2171 dump_mstats("after compilation:");
2181 =for apidoc perl_run
2183 Tells a Perl interpreter to run. See L<perlembed>.
2196 PERL_ARGS_ASSERT_PERL_RUN;
2197 #ifndef MULTIPLICITY
2198 PERL_UNUSED_ARG(my_perl);
2201 oldscope = PL_scopestack_ix;
2209 cxstack_ix = -1; /* start context stack again */
2211 case 0: /* normal completion */
2215 case 2: /* my_exit() */
2216 while (PL_scopestack_ix > oldscope)
2219 PL_curstash = PL_defstash;
2220 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2221 PL_endav && !PL_minus_c)
2222 call_list(oldscope, PL_endav);
2224 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2225 dump_mstats("after execution: ");
2231 POPSTACK_TO(PL_mainstack);
2234 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2245 S_run_body(pTHX_ I32 oldscope)
2248 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2249 PL_sawampersand ? "Enabling" : "Omitting"));
2251 if (!PL_restartop) {
2255 exit(0); /* less likely to core dump than my_exit(0) */
2258 DEBUG_x(dump_all());
2261 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2265 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2268 if (PERLDB_SINGLE && PL_DBsingle)
2269 sv_setiv(PL_DBsingle, 1);
2271 call_list(oldscope, PL_initav);
2272 #ifdef PERL_DEBUG_READONLY_OPS
2273 Perl_pending_Slabs_to_ro(aTHX);
2280 PL_op = PL_restartop;
2284 else if (PL_main_start) {
2285 CvDEPTH(PL_main_cv) = 1;
2286 PL_op = PL_main_start;
2294 =head1 SV Manipulation Functions
2296 =for apidoc p||get_sv
2298 Returns the SV of the specified Perl scalar. C<flags> are passed to
2299 C<gv_fetchpv>. If C<GV_ADD> is set and the
2300 Perl variable does not exist then it will be created. If C<flags> is zero
2301 and the variable does not exist then NULL is returned.
2307 Perl_get_sv(pTHX_ const char *name, I32 flags)
2311 PERL_ARGS_ASSERT_GET_SV;
2313 gv = gv_fetchpv(name, flags, SVt_PV);
2320 =head1 Array Manipulation Functions
2322 =for apidoc p||get_av
2324 Returns the AV of the specified Perl array. C<flags> are passed to
2325 C<gv_fetchpv>. If C<GV_ADD> is set and the
2326 Perl variable does not exist then it will be created. If C<flags> is zero
2327 and the variable does not exist then NULL is returned.
2333 Perl_get_av(pTHX_ const char *name, I32 flags)
2335 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2337 PERL_ARGS_ASSERT_GET_AV;
2347 =head1 Hash Manipulation Functions
2349 =for apidoc p||get_hv
2351 Returns the HV of the specified Perl hash. C<flags> are passed to
2352 C<gv_fetchpv>. If C<GV_ADD> is set and the
2353 Perl variable does not exist then it will be created. If C<flags> is zero
2354 and the variable does not exist then NULL is returned.
2360 Perl_get_hv(pTHX_ const char *name, I32 flags)
2362 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2364 PERL_ARGS_ASSERT_GET_HV;
2374 =head1 CV Manipulation Functions
2376 =for apidoc p||get_cvn_flags
2378 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2379 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2380 exist then it will be declared (which has the same effect as saying
2381 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2382 then NULL is returned.
2384 =for apidoc p||get_cv
2386 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2392 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2394 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2395 /* XXX this is probably not what they think they're getting.
2396 * It has the same effect as "sub name;", i.e. just a forward
2399 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2401 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2402 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2403 return newSUB(start_subparse(FALSE, 0),
2404 newSVOP(OP_CONST, 0, sv),
2412 /* Nothing in core calls this now, but we can't replace it with a macro and
2413 move it to mathoms.c as a macro would evaluate name twice. */
2415 Perl_get_cv(pTHX_ const char *name, I32 flags)
2417 PERL_ARGS_ASSERT_GET_CV;
2419 return get_cvn_flags(name, strlen(name), flags);
2422 /* Be sure to refetch the stack pointer after calling these routines. */
2426 =head1 Callback Functions
2428 =for apidoc p||call_argv
2430 Performs a callback to the specified Perl sub. See L<perlcall>.
2436 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2438 /* See G_* flags in cop.h */
2439 /* null terminated arg list */
2444 PERL_ARGS_ASSERT_CALL_ARGV;
2449 mXPUSHs(newSVpv(*argv,0));
2454 return call_pv(sub_name, flags);
2458 =for apidoc p||call_pv
2460 Performs a callback to the specified Perl sub. See L<perlcall>.
2466 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2467 /* name of the subroutine */
2468 /* See G_* flags in cop.h */
2470 PERL_ARGS_ASSERT_CALL_PV;
2472 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2476 =for apidoc p||call_method
2478 Performs a callback to the specified Perl method. The blessed object must
2479 be on the stack. See L<perlcall>.
2485 Perl_call_method(pTHX_ const char *methname, I32 flags)
2486 /* name of the subroutine */
2487 /* See G_* flags in cop.h */
2489 PERL_ARGS_ASSERT_CALL_METHOD;
2491 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2494 /* May be called with any of a CV, a GV, or an SV containing the name. */
2496 =for apidoc p||call_sv
2498 Performs a callback to the Perl sub whose name is in the SV. See
2505 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2506 /* See G_* flags in cop.h */
2509 LOGOP myop; /* fake syntax tree node */
2514 bool oldcatch = CATCH_GET;
2516 OP* const oldop = PL_op;
2519 PERL_ARGS_ASSERT_CALL_SV;
2521 if (flags & G_DISCARD) {
2525 if (!(flags & G_WANT)) {
2526 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2531 Zero(&myop, 1, LOGOP);
2532 myop.op_next = NULL;
2533 if (!(flags & G_NOARGS))
2534 myop.op_flags |= OPf_STACKED;
2535 myop.op_flags |= OP_GIMME_REVERSE(flags);
2539 EXTEND(PL_stack_sp, 1);
2540 *++PL_stack_sp = sv;
2542 oldscope = PL_scopestack_ix;
2544 if (PERLDB_SUB && PL_curstash != PL_debstash
2545 /* Handle first BEGIN of -d. */
2546 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2547 /* Try harder, since this may have been a sighandler, thus
2548 * curstash may be meaningless. */
2549 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2550 && !(flags & G_NODEBUG))
2551 PL_op->op_private |= OPpENTERSUB_DB;
2553 if (flags & G_METHOD) {
2554 Zero(&method_op, 1, UNOP);
2555 method_op.op_next = PL_op;
2556 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2557 method_op.op_type = OP_METHOD;
2558 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2559 myop.op_type = OP_ENTERSUB;
2560 PL_op = (OP*)&method_op;
2563 if (!(flags & G_EVAL)) {
2565 CALL_BODY_SUB((OP*)&myop);
2566 retval = PL_stack_sp - (PL_stack_base + oldmark);
2567 CATCH_SET(oldcatch);
2570 myop.op_other = (OP*)&myop;
2572 create_eval_scope(flags|G_FAKINGEVAL);
2580 CALL_BODY_SUB((OP*)&myop);
2581 retval = PL_stack_sp - (PL_stack_base + oldmark);
2582 if (!(flags & G_KEEPERR)) {
2590 /* my_exit() was called */
2591 PL_curstash = PL_defstash;
2594 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2595 Perl_croak(aTHX_ "Callback called exit");
2600 PL_op = PL_restartop;
2604 PL_stack_sp = PL_stack_base + oldmark;
2605 if ((flags & G_WANT) == G_ARRAY)
2609 *++PL_stack_sp = &PL_sv_undef;
2614 if (PL_scopestack_ix > oldscope)
2615 delete_eval_scope();
2619 if (flags & G_DISCARD) {
2620 PL_stack_sp = PL_stack_base + oldmark;
2629 /* Eval a string. The G_EVAL flag is always assumed. */
2632 =for apidoc p||eval_sv
2634 Tells Perl to C<eval> the string in the SV.
2640 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2642 /* See G_* flags in cop.h */
2646 UNOP myop; /* fake syntax tree node */
2647 VOL I32 oldmark = SP - PL_stack_base;
2650 OP* const oldop = PL_op;
2653 PERL_ARGS_ASSERT_EVAL_SV;
2655 if (flags & G_DISCARD) {
2662 Zero(PL_op, 1, UNOP);
2663 EXTEND(PL_stack_sp, 1);
2664 *++PL_stack_sp = sv;
2666 if (!(flags & G_NOARGS))
2667 myop.op_flags = OPf_STACKED;
2668 myop.op_next = NULL;
2669 myop.op_type = OP_ENTEREVAL;
2670 myop.op_flags |= OP_GIMME_REVERSE(flags);
2671 if (flags & G_KEEPERR)
2672 myop.op_flags |= OPf_SPECIAL;
2674 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2675 * before a PUSHEVAL, which corrupts the stack after a croak */
2676 TAINT_PROPER("eval_sv()");
2682 CALL_BODY_EVAL((OP*)&myop);
2683 retval = PL_stack_sp - (PL_stack_base + oldmark);
2684 if (!(flags & G_KEEPERR)) {
2692 /* my_exit() was called */
2693 PL_curstash = PL_defstash;
2696 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2697 Perl_croak(aTHX_ "Callback called exit");
2702 PL_op = PL_restartop;
2706 PL_stack_sp = PL_stack_base + oldmark;
2707 if ((flags & G_WANT) == G_ARRAY)
2711 *++PL_stack_sp = &PL_sv_undef;
2717 if (flags & G_DISCARD) {
2718 PL_stack_sp = PL_stack_base + oldmark;
2728 =for apidoc p||eval_pv
2730 Tells Perl to C<eval> the given string and return an SV* result.
2736 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2740 SV* sv = newSVpv(p, 0);
2742 PERL_ARGS_ASSERT_EVAL_PV;
2744 eval_sv(sv, G_SCALAR);
2751 if (croak_on_error && SvTRUE(ERRSV)) {
2752 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2758 /* Require a module. */
2761 =head1 Embedding Functions
2763 =for apidoc p||require_pv
2765 Tells Perl to C<require> the file named by the string argument. It is
2766 analogous to the Perl code C<eval "require '$file'">. It's even
2767 implemented that way; consider using load_module instead.
2772 Perl_require_pv(pTHX_ const char *pv)
2778 PERL_ARGS_ASSERT_REQUIRE_PV;
2780 PUSHSTACKi(PERLSI_REQUIRE);
2782 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2783 eval_sv(sv_2mortal(sv), G_DISCARD);
2789 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2791 /* This message really ought to be max 23 lines.
2792 * Removed -h because the user already knows that option. Others? */
2794 static const char * const usage_msg[] = {
2795 "-0[octal] specify record separator (\\0, if no argument)",
2796 "-a autosplit mode with -n or -p (splits $_ into @F)",
2797 "-C[number/list] enables the listed Unicode features",
2798 "-c check syntax only (runs BEGIN and CHECK blocks)",
2799 "-d[:debugger] run program under debugger",
2800 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2801 "-e program one line of program (several -e's allowed, omit programfile)",
2802 "-E program like -e, but enables all optional features",
2803 "-f don't do $sitelib/sitecustomize.pl at startup",
2804 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2805 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2806 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2807 "-l[octal] enable line ending processing, specifies line terminator",
2808 "-[mM][-]module execute \"use/no module...\" before executing program",
2809 "-n assume \"while (<>) { ... }\" loop around program",
2810 "-p assume loop like -n but print line also, like sed",
2811 "-s enable rudimentary parsing for switches after programfile",
2812 "-S look for programfile using PATH environment variable",
2813 "-t enable tainting warnings",
2814 "-T enable tainting checks",
2815 "-u dump core after parsing program",
2816 "-U allow unsafe operations",
2817 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2818 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2819 "-w enable many useful warnings (RECOMMENDED)",
2820 "-W enable all warnings",
2821 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2822 "-X disable all warnings",
2826 const char * const *p = usage_msg;
2828 PERL_ARGS_ASSERT_USAGE;
2830 PerlIO_printf(PerlIO_stdout(),
2831 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2834 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2837 /* convert a string of -D options (or digits) into an int.
2838 * sets *s to point to the char after the options */
2842 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2844 static const char * const usage_msgd[] = {
2845 " Debugging flag values: (see also -d)",
2846 " p Tokenizing and parsing (with v, displays parse stack)",
2847 " s Stack snapshots (with v, displays all stacks)",
2848 " l Context (loop) stack processing",
2849 " t Trace execution",
2850 " o Method and overloading resolution",
2851 " c String/numeric conversions",
2852 " P Print profiling info, source file input state",
2853 " m Memory and SV allocation",
2854 " f Format processing",
2855 " r Regular expression parsing and execution",
2856 " x Syntax tree dump",
2857 " u Tainting checks",
2858 " H Hash dump -- usurps values()",
2859 " X Scratchpad allocation",
2862 " R Include reference counts of dumped variables (eg when using -Ds)",
2863 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2864 " v Verbose: use in conjunction with other flags",
2866 " A Consistency checks on internal structures",
2867 " q quiet - currently only suppresses the 'EXECUTING' message",
2872 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2875 /* if adding extra options, remember to update DEBUG_MASK */
2876 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2878 for (; isALNUM(**s); (*s)++) {
2879 const char * const d = strchr(debopts,**s);
2881 i |= 1 << (d - debopts);
2882 else if (ckWARN_d(WARN_DEBUGGING))
2883 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2884 "invalid option -D%c, use -D'' to see choices\n", **s);
2887 else if (isDIGIT(**s)) {
2889 for (; isALNUM(**s); (*s)++) ;
2891 else if (givehelp) {
2892 const char *const *p = usage_msgd;
2893 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2896 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2897 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2898 "-Dp not implemented on this platform\n");
2904 /* This routine handles any switches that can be given during run */
2907 Perl_moreswitches(pTHX_ const char *s)
2911 const char option = *s; /* used to remember option in -m/-M code */
2913 PERL_ARGS_ASSERT_MORESWITCHES;
2921 SvREFCNT_dec(PL_rs);
2922 if (s[1] == 'x' && s[2]) {
2923 const char *e = s+=2;
2929 flags = PERL_SCAN_SILENT_ILLDIGIT;
2930 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2931 if (s + numlen < e) {
2932 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2936 PL_rs = newSVpvs("");
2937 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2938 tmps = (U8*)SvPVX(PL_rs);
2939 uvchr_to_utf8(tmps, rschar);
2940 SvCUR_set(PL_rs, UNISKIP(rschar));
2945 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2946 if (rschar & ~((U8)~0))
2947 PL_rs = &PL_sv_undef;
2948 else if (!rschar && numlen >= 2)
2949 PL_rs = newSVpvs("");
2951 char ch = (char)rschar;
2952 PL_rs = newSVpvn(&ch, 1);
2955 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2960 PL_unicode = parse_unicode_opts( (const char **)&s );
2961 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2967 while (*s && !isSPACE(*s)) ++s;
2968 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2979 forbid_setid('d', FALSE);
2982 /* -dt indicates to the debugger that threads will be used */
2983 if (*s == 't' && !isALNUM(s[1])) {
2985 my_setenv("PERL5DB_THREADED", "1");
2988 /* The following permits -d:Mod to accepts arguments following an =
2989 in the fashion that -MSome::Mod does. */
2990 if (*s == ':' || *s == '=') {
2991 const char *start = ++s;
2992 const char *const end = s + strlen(s);
2993 SV * const sv = newSVpvs("use Devel::");
2995 /* We now allow -d:Module=Foo,Bar */
2996 while(isALNUM(*s) || *s==':') ++s;
2998 sv_catpvn(sv, start, end - start);
3000 sv_catpvn(sv, start, s-start);
3001 /* Don't use NUL as q// delimiter here, this string goes in the
3003 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3006 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3010 PL_perldb = PERLDB_ALL;
3017 forbid_setid('D', FALSE);
3019 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3020 #else /* !DEBUGGING */
3021 if (ckWARN_d(WARN_DEBUGGING))
3022 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3023 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3024 for (s++; isALNUM(*s); s++) ;
3029 usage(PL_origargv[0]);
3032 Safefree(PL_inplace);
3033 #if defined(__CYGWIN__) /* do backup extension automagically */
3034 if (*(s+1) == '\0') {
3035 PL_inplace = savepvs(".bak");
3038 #endif /* __CYGWIN__ */
3040 const char * const start = ++s;
3041 while (*s && !isSPACE(*s))
3044 PL_inplace = savepvn(start, s - start);
3048 if (*s == '-') /* Additional switches on #! line. */
3052 case 'I': /* -I handled both here and in parse_body() */
3053 forbid_setid('I', FALSE);
3055 while (*s && isSPACE(*s))
3060 /* ignore trailing spaces (possibly followed by other switches) */
3062 for (e = p; *e && !isSPACE(*e); e++) ;
3066 } while (*p && *p != '-');
3068 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3074 Perl_croak(aTHX_ "No directory specified for -I");
3080 SvREFCNT_dec(PL_ors_sv);
3086 PL_ors_sv = newSVpvs("\n");
3087 numlen = 3 + (*s == '0');
3088 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3092 if (RsPARA(PL_rs)) {
3093 PL_ors_sv = newSVpvs("\n\n");
3096 PL_ors_sv = newSVsv(PL_rs);
3101 forbid_setid('M', FALSE); /* XXX ? */
3104 forbid_setid('m', FALSE); /* XXX ? */
3109 const char *use = "use ";
3111 /* -M-foo == 'no foo' */
3112 /* Leading space on " no " is deliberate, to make both
3113 possibilities the same length. */
3114 if (*s == '-') { use = " no "; ++s; }
3115 sv = newSVpvn(use,4);
3117 /* We allow -M'Module qw(Foo Bar)' */
3118 while(isALNUM(*s) || *s==':') {
3127 Perl_croak(aTHX_ "Module name required with -%c option",
3130 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3131 "contains single ':'",
3132 (int)(s - start), start, option);
3133 end = s + strlen(s);
3135 sv_catpvn(sv, start, end - start);
3136 if (option == 'm') {
3138 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3139 sv_catpvs( sv, " ()");
3142 sv_catpvn(sv, start, s-start);
3143 /* Use NUL as q''-delimiter. */
3144 sv_catpvs(sv, " split(/,/,q\0");
3146 sv_catpvn(sv, s, end - s);
3147 sv_catpvs(sv, "\0)");
3150 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3153 Perl_croak(aTHX_ "Missing argument to -%c", option);
3164 forbid_setid('s', FALSE);
3165 PL_doswitches = TRUE;
3179 PL_do_undump = TRUE;
3187 if (!sv_derived_from(PL_patchlevel, "version"))
3188 upg_version(PL_patchlevel, TRUE);
3191 SV* level= vstringify(PL_patchlevel);
3192 #ifdef PERL_PATCHNUM
3193 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3194 SV *num = newSVpvs(PERL_PATCHNUM "*");
3196 SV *num = newSVpvs(PERL_PATCHNUM);
3199 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3200 SvREFCNT_dec(level);
3203 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3207 PerlIO_printf(PerlIO_stdout(),
3208 "\nThis is perl, %"SVf
3212 SvREFCNT_dec(level);
3215 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3216 PerlIO_printf(PerlIO_stdout(),
3217 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3218 SVfARG(vstringify(PL_patchlevel))));
3219 PerlIO_printf(PerlIO_stdout(),
3220 Perl_form(aTHX_ " built under %s at %s %s\n",
3221 OSNAME, __DATE__, __TIME__));
3222 PerlIO_printf(PerlIO_stdout(),
3223 Perl_form(aTHX_ " OS Specific Release: %s\n",
3226 #if defined(LOCAL_PATCH_COUNT)
3227 if (LOCAL_PATCH_COUNT > 0)
3228 PerlIO_printf(PerlIO_stdout(),
3229 "\n(with %d registered patch%s, "
3230 "see perl -V for more detail)",
3232 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3235 PerlIO_printf(PerlIO_stdout(),
3236 "\n\nCopyright 1987-2009, Larry Wall\n");
3238 PerlIO_printf(PerlIO_stdout(),
3239 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3242 PerlIO_printf(PerlIO_stdout(),
3243 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3244 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3247 PerlIO_printf(PerlIO_stdout(),
3248 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3249 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3252 PerlIO_printf(PerlIO_stdout(),
3253 "atariST series port, ++jrb bammi@cadence.com\n");
3256 PerlIO_printf(PerlIO_stdout(),
3257 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3260 PerlIO_printf(PerlIO_stdout(),
3261 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MiNT port by Guido Flohr, 1997-1999\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "EPOC port by Olaf Flebbe, 1999-2002\n");
3288 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3289 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3292 #ifdef __SYMBIAN32__
3293 PerlIO_printf(PerlIO_stdout(),
3294 "Symbian port by Nokia, 2004-2005\n");
3296 #ifdef BINARY_BUILD_NOTICE
3297 BINARY_BUILD_NOTICE;
3299 PerlIO_printf(PerlIO_stdout(),
3301 Perl may be copied only under the terms of either the Artistic License or the\n\
3302 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3303 Complete documentation for Perl, including FAQ lists, should be found on\n\
3304 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3305 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3308 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3309 PL_dowarn |= G_WARN_ON;
3314 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3315 if (!specialWARN(PL_compiling.cop_warnings))
3316 PerlMemShared_free(PL_compiling.cop_warnings);
3317 PL_compiling.cop_warnings = pWARN_ALL ;
3321 PL_dowarn = G_WARN_ALL_OFF;
3322 if (!specialWARN(PL_compiling.cop_warnings))
3323 PerlMemShared_free(PL_compiling.cop_warnings);
3324 PL_compiling.cop_warnings = pWARN_NONE ;
3331 if (s[0] == '-') /* Additional switches on #! line. */
3336 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3342 #ifdef ALTERNATE_SHEBANG
3343 case 'S': /* OS/2 needs -S on "extproc" line. */
3347 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3352 /* compliments of Tom Christiansen */
3354 /* unexec() can be found in the Gnu emacs distribution */
3355 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3358 Perl_my_unexec(pTHX)
3360 PERL_UNUSED_CONTEXT;
3362 SV * prog = newSVpv(BIN_EXP, 0);
3363 SV * file = newSVpv(PL_origfilename, 0);
3367 sv_catpvs(prog, "/perl");
3368 sv_catpvs(file, ".perldump");
3370 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3371 /* unexec prints msg to stderr in case of failure */
3372 PerlProc_exit(status);
3375 # include <lib$routines.h>
3376 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3377 # elif defined(WIN32) || defined(__CYGWIN__)
3378 Perl_croak(aTHX_ "dump is not supported");
3380 ABORT(); /* for use with undump */
3385 /* initialize curinterp */
3391 # define PERLVAR(var,type)
3392 # define PERLVARA(var,n,type)
3393 # if defined(PERL_IMPLICIT_CONTEXT)
3394 # define PERLVARI(var,type,init) aTHX->var = init;
3395 # define PERLVARIC(var,type,init) aTHX->var = init;
3397 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3398 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3400 # include "intrpvar.h"
3406 # define PERLVAR(var,type)
3407 # define PERLVARA(var,n,type)
3408 # define PERLVARI(var,type,init) PL_##var = init;
3409 # define PERLVARIC(var,type,init) PL_##var = init;
3410 # include "intrpvar.h"
3417 /* As these are inside a structure, PERLVARI isn't capable of initialising
3419 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3420 PL_reg_poscache = PL_reg_starttry = NULL;
3424 S_init_main_stash(pTHX)
3429 PL_curstash = PL_defstash = newHV();
3430 /* We know that the string "main" will be in the global shared string
3431 table, so it's a small saving to use it rather than allocate another
3433 PL_curstname = newSVpvs_share("main");
3434 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3435 /* If we hadn't caused another reference to "main" to be in the shared
3436 string table above, then it would be worth reordering these two,
3437 because otherwise all we do is delete "main" from it as a consequence
3438 of the SvREFCNT_dec, only to add it again with hv_name_set */
3439 SvREFCNT_dec(GvHV(gv));
3440 hv_name_set(PL_defstash, "main", 4, 0);
3441 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3443 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3445 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3446 GvMULTI_on(PL_incgv);
3447 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3448 GvMULTI_on(PL_hintgv);
3449 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3450 SvREFCNT_inc_simple_void(PL_defgv);
3451 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3452 SvREFCNT_inc_simple_void(PL_errgv);
3453 GvMULTI_on(PL_errgv);
3454 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3455 GvMULTI_on(PL_replgv);
3456 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3457 #ifdef PERL_DONT_CREATE_GVSV
3460 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3462 PL_curstash = PL_defstash;
3463 CopSTASH_set(&PL_compiling, PL_defstash);
3464 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3465 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3467 /* We must init $/ before switches are processed. */
3468 sv_setpvs(get_sv("/", GV_ADD), "\n");
3472 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3473 bool *suidscript, PerlIO **rsfpp)
3478 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3481 PL_origfilename = savepvs("-e");
3484 /* if find_script() returns, it returns a malloc()-ed value */
3485 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3487 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3488 const char *s = scriptname + 8;
3494 * Tell apart "normal" usage of fdscript, e.g.
3495 * with bash on FreeBSD:
3496 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3497 * from usage in suidperl.
3498 * Does any "normal" usage leave garbage after the number???
3499 * Is it a mistake to use a similar /dev/fd/ construct for
3504 * Be supersafe and do some sanity-checks.
3505 * Still, can we be sure we got the right thing?
3508 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3511 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3513 scriptname = savepv(s + 1);
3514 Safefree(PL_origfilename);
3515 PL_origfilename = (char *)scriptname;
3520 CopFILE_free(PL_curcop);
3521 CopFILE_set(PL_curcop, PL_origfilename);
3522 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3523 scriptname = (char *)"";
3524 if (fdscript >= 0) {
3525 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3526 # if defined(HAS_FCNTL) && defined(F_SETFD)
3528 /* ensure close-on-exec */
3529 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3532 else if (!*scriptname) {
3533 forbid_setid(0, *suidscript);
3534 *rsfpp = PerlIO_stdin();
3537 #ifdef FAKE_BIT_BUCKET
3538 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3539 * is called) and still have the "-e" work. (Believe it or not,
3540 * a /dev/null is required for the "-e" to work because source
3541 * filter magic is used to implement it. ) This is *not* a general
3542 * replacement for a /dev/null. What we do here is create a temp
3543 * file (an empty file), open up that as the script, and then
3544 * immediately close and unlink it. Close enough for jazz. */
3545 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3546 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3547 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3548 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3549 FAKE_BIT_BUCKET_TEMPLATE
3551 const char * const err = "Failed to create a fake bit bucket";
3552 if (strEQ(scriptname, BIT_BUCKET)) {
3553 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3554 int tmpfd = mkstemp(tmpname);
3556 scriptname = tmpname;
3559 Perl_croak(aTHX_ err);
3562 scriptname = mktemp(tmpname);
3564 Perl_croak(aTHX_ err);
3569 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3570 #ifdef FAKE_BIT_BUCKET
3571 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3572 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3573 && strlen(scriptname) == sizeof(tmpname) - 1) {
3576 scriptname = BIT_BUCKET;
3578 # if defined(HAS_FCNTL) && defined(F_SETFD)
3580 /* ensure close-on-exec */
3581 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3585 /* PSz 16 Sep 03 Keep neat error message */
3587 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3589 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3590 CopFILE(PL_curcop), Strerror(errno));
3596 * I_SYSSTATVFS HAS_FSTATVFS
3598 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3599 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3600 * here so that metaconfig picks them up. */
3603 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3604 /* Don't even need this function. */
3607 S_validate_suid(pTHX_ PerlIO *rsfp)
3609 PERL_ARGS_ASSERT_VALIDATE_SUID;
3611 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3614 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3615 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3617 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3620 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3621 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3622 /* not set-id, must be wrapped */
3625 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3628 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3632 register const char *s2;
3634 PERL_ARGS_ASSERT_FIND_BEGINNING;
3636 /* skip forward in input to the real script? */
3638 while (PL_doextract) {
3639 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3640 Perl_croak(aTHX_ "No Perl script found in input\n");
3642 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3643 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3644 PL_doextract = FALSE;
3645 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3647 while (*s == ' ' || *s == '\t') s++;
3649 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3650 || s2[-1] == '_') s2--;
3651 if (strnEQ(s2-4,"perl",4))
3652 while ((s = moreswitches(s)))
3664 PL_uid = PerlProc_getuid();
3665 PL_euid = PerlProc_geteuid();
3666 PL_gid = PerlProc_getgid();
3667 PL_egid = PerlProc_getegid();
3669 PL_uid |= PL_gid << 16;
3670 PL_euid |= PL_egid << 16;
3672 /* Should not happen: */
3673 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3674 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3677 * Should go by suidscript, not uid!=euid: why disallow
3678 * system("ls") in scripts run from setuid things?
3679 * Or, is this run before we check arguments and set suidscript?
3680 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3681 * (We never have suidscript, can we be sure to have fdscript?)
3682 * Or must then go by UID checks? See comments in forbid_setid also.
3686 /* This is used very early in the lifetime of the program,
3687 * before even the options are parsed, so PL_tainting has
3688 * not been initialized properly. */
3690 Perl_doing_taint(int argc, char *argv[], char *envp[])
3692 #ifndef PERL_IMPLICIT_SYS
3693 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3694 * before we have an interpreter-- and the whole point of this
3695 * function is to be called at such an early stage. If you are on
3696 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3697 * "tainted because running with altered effective ids', you'll
3698 * have to add your own checks somewhere in here. The two most
3699 * known samples of 'implicitness' are Win32 and NetWare, neither
3700 * of which has much of concept of 'uids'. */
3701 int uid = PerlProc_getuid();
3702 int euid = PerlProc_geteuid();
3703 int gid = PerlProc_getgid();
3704 int egid = PerlProc_getegid();
3711 if (uid && (euid != uid || egid != gid))
3713 #endif /* !PERL_IMPLICIT_SYS */
3714 /* This is a really primitive check; environment gets ignored only
3715 * if -T are the first chars together; otherwise one gets
3716 * "Too late" message. */
3717 if ( argc > 1 && argv[1][0] == '-'
3718 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3723 /* Passing the flag as a single char rather than a string is a slight space
3724 optimisation. The only message that isn't /^-.$/ is
3725 "program input from stdin", which is substituted in place of '\0', which
3726 could never be a command line flag. */
3728 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3731 char string[3] = "-x";
3732 const char *message = "program input from stdin";
3739 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3740 if (PL_euid != PL_uid)
3741 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3742 if (PL_egid != PL_gid)
3743 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3744 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3746 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3750 Perl_init_debugger(pTHX)
3753 HV * const ostash = PL_curstash;
3755 PL_curstash = PL_debstash;
3756 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3758 AvREAL_off(PL_dbargs);
3759 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3760 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3761 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3762 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3763 sv_setiv(PL_DBsingle, 0);
3764 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3765 sv_setiv(PL_DBtrace, 0);
3766 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3767 sv_setiv(PL_DBsignal, 0);
3768 PL_curstash = ostash;
3771 #ifndef STRESS_REALLOC
3772 #define REASONABLE(size) (size)
3774 #define REASONABLE(size) (1) /* unreasonable */
3778 Perl_init_stacks(pTHX)
3781 /* start with 128-item stack and 8K cxstack */
3782 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3783 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3784 PL_curstackinfo->si_type = PERLSI_MAIN;
3785 PL_curstack = PL_curstackinfo->si_stack;
3786 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3788 PL_stack_base = AvARRAY(PL_curstack);
3789 PL_stack_sp = PL_stack_base;
3790 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3792 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3795 PL_tmps_max = REASONABLE(128);
3797 Newx(PL_markstack,REASONABLE(32),I32);
3798 PL_markstack_ptr = PL_markstack;
3799 PL_markstack_max = PL_markstack + REASONABLE(32);
3803 Newx(PL_scopestack,REASONABLE(32),I32);
3804 PL_scopestack_ix = 0;
3805 PL_scopestack_max = REASONABLE(32);
3807 Newx(PL_savestack,REASONABLE(128),ANY);
3808 PL_savestack_ix = 0;
3809 PL_savestack_max = REASONABLE(128);
3818 while (PL_curstackinfo->si_next)
3819 PL_curstackinfo = PL_curstackinfo->si_next;
3820 while (PL_curstackinfo) {
3821 PERL_SI *p = PL_curstackinfo->si_prev;
3822 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3823 Safefree(PL_curstackinfo->si_cxstack);
3824 Safefree(PL_curstackinfo);
3825 PL_curstackinfo = p;
3827 Safefree(PL_tmps_stack);
3828 Safefree(PL_markstack);
3829 Safefree(PL_scopestack);
3830 Safefree(PL_savestack);
3835 S_init_predump_symbols(pTHX)
3841 sv_setpvs(get_sv("\"", GV_ADD), " ");
3842 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3844 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3845 GvMULTI_on(PL_stdingv);
3846 io = GvIOp(PL_stdingv);
3847 IoTYPE(io) = IoTYPE_RDONLY;
3848 IoIFP(io) = PerlIO_stdin();
3849 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3851 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3853 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3856 IoTYPE(io) = IoTYPE_WRONLY;
3857 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3859 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3861 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3863 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3864 GvMULTI_on(PL_stderrgv);
3865 io = GvIOp(PL_stderrgv);
3866 IoTYPE(io) = IoTYPE_WRONLY;
3867 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3868 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3870 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3872 PL_statname = newSV(0); /* last filename we did stat on */
3874 Safefree(PL_osname);
3875 PL_osname = savepv(OSNAME);
3879 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3883 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3885 argc--,argv++; /* skip name of script */
3886 if (PL_doswitches) {
3887 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3891 if (argv[0][1] == '-' && !argv[0][2]) {
3895 if ((s = strchr(argv[0], '='))) {
3896 const char *const start_name = argv[0] + 1;
3897 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3898 TRUE, SVt_PV)), s + 1);
3901 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3904 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3905 GvMULTI_on(PL_argvgv);
3906 (void)gv_AVadd(PL_argvgv);
3907 av_clear(GvAVn(PL_argvgv));
3908 for (; argc > 0; argc--,argv++) {
3909 SV * const sv = newSVpv(argv[0],0);
3910 av_push(GvAVn(PL_argvgv),sv);
3911 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3912 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3915 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3916 (void)sv_utf8_decode(sv);
3922 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3927 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3929 PL_toptarget = newSV_type(SVt_PVFM);
3930 sv_setpvs(PL_toptarget, "");
3931 PL_bodytarget = newSV_type(SVt_PVFM);
3932 sv_setpvs(PL_bodytarget, "");
3933 PL_formtarget = PL_bodytarget;
3937 init_argv_symbols(argc,argv);
3939 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3940 sv_setpv(GvSV(tmpgv),PL_origfilename);
3942 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
3944 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
3947 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3949 bool env_is_not_environ;
3950 GvMULTI_on(PL_envgv);
3951 hv = GvHVn(PL_envgv);
3952 hv_magic(hv, NULL, PERL_MAGIC_env);
3954 #ifdef USE_ENVIRON_ARRAY
3955 /* Note that if the supplied env parameter is actually a copy
3956 of the global environ then it may now point to free'd memory
3957 if the environment has been modified since. To avoid this
3958 problem we treat env==NULL as meaning 'use the default'
3962 env_is_not_environ = env != environ;
3963 if (env_is_not_environ
3964 # ifdef USE_ITHREADS
3965 && PL_curinterp == aTHX
3974 for (; *env; env++) {
3977 if (!(s = strchr(old_var,'=')) || s == old_var)
3980 #if defined(MSDOS) && !defined(DJGPP)
3982 (void)strupr(old_var);
3985 sv = newSVpv(s+1, 0);
3986 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3987 if (env_is_not_environ)
3991 #endif /* USE_ENVIRON_ARRAY */
3992 #endif /* !PERL_MICRO */
3995 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3996 SvREADONLY_off(GvSV(tmpgv));
3997 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
3998 SvREADONLY_on(GvSV(tmpgv));
4000 #ifdef THREADS_HAVE_PIDS
4001 PL_ppid = (IV)getppid();
4004 /* touch @F array to prevent spurious warnings 20020415 MJD */
4006 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4011 S_init_perllib(pTHX)
4015 const char *perl5lib = NULL;
4024 perl5lib = PerlEnv_getenv("PERL5LIB");
4026 * It isn't possible to delete an environment variable with
4027 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4028 * case we treat PERL5LIB as undefined if it has a zero-length value.
4030 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4031 if (perl5lib && *perl5lib != '\0')
4035 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4037 s = PerlEnv_getenv("PERLLIB");
4039 incpush_use_sep(s, 0, 0);
4042 /* Treat PERL5?LIB as a possible search list logical name -- the
4043 * "natural" VMS idiom for a Unix path string. We allow each
4044 * element to be a set of |-separated directories for compatibility.
4048 if (my_trnlnm("PERL5LIB",buf,0))
4050 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4051 } while (my_trnlnm("PERL5LIB",buf,++idx));
4053 while (my_trnlnm("PERLLIB",buf,idx++))
4054 incpush_use_sep(buf, 0, 0);
4059 /* Use the ~-expanded versions of APPLLIB (undocumented),
4060 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4063 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4064 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4068 /* sitearch is always relative to sitelib on Windows for
4069 * DLL-based path intuition to work correctly */
4070 # if !defined(WIN32)
4071 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4072 INCPUSH_CAN_RELOCATE);
4078 /* this picks up sitearch as well */
4079 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4081 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4083 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4087 #ifdef PERL_VENDORARCH_EXP
4088 /* vendorarch is always relative to vendorlib on Windows for
4089 * DLL-based path intuition to work correctly */
4090 # if !defined(WIN32)
4091 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4092 INCPUSH_CAN_RELOCATE);
4096 #ifdef PERL_VENDORLIB_EXP
4098 /* this picks up vendorarch as well */
4099 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4101 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4103 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4104 INCPUSH_CAN_RELOCATE);
4109 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4113 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4117 s = win32_get_privlib(PERL_FS_VERSION, &len);
4119 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4122 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4124 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4128 #ifdef PERL_OTHERLIBDIRS
4129 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4130 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4131 |INCPUSH_CAN_RELOCATE);
4137 * It isn't possible to delete an environment variable with
4138 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4139 * case we treat PERL5LIB as undefined if it has a zero-length value.
4141 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4142 if (perl5lib && *perl5lib != '\0')
4146 incpush_use_sep(perl5lib, 0,
4147 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4149 /* Treat PERL5?LIB as a possible search list logical name -- the
4150 * "natural" VMS idiom for a Unix path string. We allow each
4151 * element to be a set of |-separated directories for compatibility.
4155 if (my_trnlnm("PERL5LIB",buf,0))
4157 incpush_use_sep(buf, 0,
4158 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4159 } while (my_trnlnm("PERL5LIB",buf,++idx));
4163 /* Use the ~-expanded versions of APPLLIB (undocumented),
4164 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4167 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4168 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4171 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4172 /* Search for version-specific dirs below here */
4173 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4174 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4178 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4179 /* Search for version-specific dirs below here */
4180 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4181 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4184 #ifdef PERL_OTHERLIBDIRS
4185 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4186 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4187 |INCPUSH_CAN_RELOCATE);
4191 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4194 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4195 # define PERLLIB_SEP ';'
4198 # define PERLLIB_SEP '|'
4200 # define PERLLIB_SEP ':'
4203 #ifndef PERLLIB_MANGLE
4204 # define PERLLIB_MANGLE(s,n) (s)
4207 /* Push a directory onto @INC if it exists.
4208 Generate a new SV if we do this, to save needing to copy the SV we push
4211 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4216 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4218 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4219 S_ISDIR(tmpstatbuf.st_mode)) {
4221 dir = newSVsv(stem);
4223 /* Truncate dir back to stem. */
4224 SvCUR_set(dir, SvCUR(stem));
4230 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4233 const U8 using_sub_dirs
4234 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4235 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4236 const U8 add_versioned_sub_dirs
4237 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4238 const U8 add_archonly_sub_dirs
4239 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4240 #ifdef PERL_INC_VERSION_LIST
4241 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4243 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4244 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4245 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4246 AV *const inc = GvAVn(PL_incgv);
4248 PERL_ARGS_ASSERT_INCPUSH;
4251 /* Could remove this vestigial extra block, if we don't mind a lot of
4252 re-indenting diff noise. */
4255 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4256 arranged to unshift #! line -I onto the front of @INC. However,
4257 -I can add version and architecture specific libraries, and they
4258 need to go first. The old code assumed that it was always
4259 pushing. Hence to make it work, need to push the architecture
4260 (etc) libraries onto a temporary array, then "unshift" that onto
4261 the front of @INC. */
4262 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4265 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4266 defined to so something (in os2/os2.c), but the code has been
4267 this way, ignoring any possible changed of length, since
4268 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4270 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4272 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4275 /* Do the if() outside the #ifdef to avoid warnings about an unused
4278 #ifdef PERL_RELOCATABLE_INC
4280 * Relocatable include entries are marked with a leading .../
4283 * 0: Remove that leading ".../"
4284 * 1: Remove trailing executable name (anything after the last '/')
4285 * from the perl path to give a perl prefix
4287 * While the @INC element starts "../" and the prefix ends with a real
4288 * directory (ie not . or ..) chop that real directory off the prefix
4289 * and the leading "../" from the @INC element. ie a logical "../"
4291 * Finally concatenate the prefix and the remainder of the @INC element
4292 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4293 * generates /usr/local/lib/perl5
4295 const char *libpath = SvPVX(libdir);
4296 STRLEN libpath_len = SvCUR(libdir);
4297 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4299 SV * const caret_X = get_sv("\030", 0);
4300 /* Going to use the SV just as a scratch buffer holding a C
4306 /* $^X is *the* source of taint if tainting is on, hence
4307 SvPOK() won't be true. */
4309 assert(SvPOKp(caret_X));
4310 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4312 /* Firstly take off the leading .../
4313 If all else fail we'll do the paths relative to the current
4315 sv_chop(libdir, libpath + 4);
4316 /* Don't use SvPV as we're intentionally bypassing taining,
4317 mortal copies that the mg_get of tainting creates, and
4318 corruption that seems to come via the save stack.
4319 I guess that the save stack isn't correctly set up yet. */
4320 libpath = SvPVX(libdir);
4321 libpath_len = SvCUR(libdir);
4323 /* This would work more efficiently with memrchr, but as it's
4324 only a GNU extension we'd need to probe for it and
4325 implement our own. Not hard, but maybe not worth it? */
4327 prefix = SvPVX(prefix_sv);
4328 lastslash = strrchr(prefix, '/');
4330 /* First time in with the *lastslash = '\0' we just wipe off
4331 the trailing /perl from (say) /usr/foo/bin/perl
4335 while ((*lastslash = '\0'), /* Do that, come what may. */
4336 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4337 && (lastslash = strrchr(prefix, '/')))) {
4338 if (lastslash[1] == '\0'
4339 || (lastslash[1] == '.'
4340 && (lastslash[2] == '/' /* ends "/." */
4341 || (lastslash[2] == '/'
4342 && lastslash[3] == '/' /* or "/.." */
4344 /* Prefix ends "/" or "/." or "/..", any of which
4345 are fishy, so don't do any more logical cleanup.
4349 /* Remove leading "../" from path */
4352 /* Next iteration round the loop removes the last
4353 directory name from prefix by writing a '\0' in
4354 the while clause. */
4356 /* prefix has been terminated with a '\0' to the correct
4357 length. libpath points somewhere into the libdir SV.
4358 We need to join the 2 with '/' and drop the result into
4360 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4361 SvREFCNT_dec(libdir);
4362 /* And this is the new libdir. */
4365 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4366 /* Need to taint reloccated paths if running set ID */
4367 SvTAINTED_on(libdir);
4370 SvREFCNT_dec(prefix_sv);
4375 * BEFORE pushing libdir onto @INC we may first push version- and
4376 * archname-specific sub-directories.
4378 if (using_sub_dirs) {
4380 #ifdef PERL_INC_VERSION_LIST
4381 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4382 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4383 const char * const *incver;
4390 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4392 while (unix[len-1] == '/') len--; /* Cosmetic */
4393 sv_usepvn(libdir,unix,len);
4396 PerlIO_printf(Perl_error_log,
4397 "Failed to unixify @INC element \"%s\"\n",
4401 subdir = newSVsv(libdir);
4403 if (add_versioned_sub_dirs) {
4404 /* .../version/archname if -d .../version/archname */
4405 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4406 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4408 /* .../version if -d .../version */
4409 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4410 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4413 #ifdef PERL_INC_VERSION_LIST
4415 for (incver = incverlist; *incver; incver++) {
4416 /* .../xxx if -d .../xxx */
4417 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4418 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4423 if (add_archonly_sub_dirs) {
4424 /* .../archname if -d .../archname */
4425 sv_catpvs(subdir, "/" ARCHNAME);
4426 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4430 assert (SvREFCNT(subdir) == 1);
4431 SvREFCNT_dec(subdir);
4434 /* finally add this lib directory at the end of @INC */
4436 U32 extra = av_len(av) + 1;
4437 av_unshift(inc, extra + push_basedir);
4439 av_store(inc, extra, libdir);
4441 /* av owns a reference, av_store() expects to be donated a
4442 reference, and av expects to be sane when it's cleared.
4443 If I wanted to be naughty and wrong, I could peek inside the
4444 implementation of av_clear(), realise that it uses
4445 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4446 and so directly steal from it (with a memcpy() to inc, and
4447 then memset() to NULL them out. But people copy code from the
4448 core expecting it to be best practise, so let's use the API.
4449 Although studious readers will note that I'm not checking any
4451 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4455 else if (push_basedir) {
4456 av_push(inc, libdir);
4459 if (!push_basedir) {
4460 assert (SvREFCNT(libdir) == 1);
4461 SvREFCNT_dec(libdir);
4467 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4471 /* This logic has been broken out from S_incpush(). It may be possible to
4474 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4481 /* Break at all separators */
4482 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4484 /* skip any consecutive separators */
4486 /* Uncomment the next line for PATH semantics */
4487 /* But you'll need to write tests */
4488 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4490 incpush(p, (STRLEN)(s - p), flags);
4495 incpush(p, (STRLEN)(end - p), flags);
4500 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4504 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4510 PERL_ARGS_ASSERT_CALL_LIST;
4512 while (av_len(paramList) >= 0) {
4513 cv = MUTABLE_CV(av_shift(paramList));
4515 if (paramList == PL_beginav) {
4516 /* save PL_beginav for compiler */
4517 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4519 else if (paramList == PL_checkav) {
4520 /* save PL_checkav for compiler */
4521 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4523 else if (paramList == PL_unitcheckav) {
4524 /* save PL_unitcheckav for compiler */
4525 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4536 PL_madskills |= 16384;
4541 PL_madskills &= ~16384;
4544 (void)SvPV_const(atsv, len);
4546 PL_curcop = &PL_compiling;
4547 CopLINE_set(PL_curcop, oldline);
4548 if (paramList == PL_beginav)
4549 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4551 Perl_sv_catpvf(aTHX_ atsv,
4552 "%s failed--call queue aborted",
4553 paramList == PL_checkav ? "CHECK"
4554 : paramList == PL_initav ? "INIT"
4555 : paramList == PL_unitcheckav ? "UNITCHECK"
4557 while (PL_scopestack_ix > oldscope)
4560 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4567 /* my_exit() was called */
4568 while (PL_scopestack_ix > oldscope)
4571 PL_curstash = PL_defstash;
4572 PL_curcop = &PL_compiling;
4573 CopLINE_set(PL_curcop, oldline);
4575 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4576 if (paramList == PL_beginav)
4577 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4579 Perl_croak(aTHX_ "%s failed--call queue aborted",
4580 paramList == PL_checkav ? "CHECK"
4581 : paramList == PL_initav ? "INIT"
4582 : paramList == PL_unitcheckav ? "UNITCHECK"
4589 PL_curcop = &PL_compiling;
4590 CopLINE_set(PL_curcop, oldline);
4593 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4602 Perl_my_exit(pTHX_ U32 status)
4613 STATUS_EXIT_SET(status);
4620 Perl_my_failure_exit(pTHX)
4624 /* We have been called to fall on our sword. The desired exit code
4625 * should be already set in STATUS_UNIX, but could be shifted over
4626 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4629 * If an error code has not been set, then force the issue.
4631 if (MY_POSIX_EXIT) {
4633 /* According to the die_exit.t tests, if errno is non-zero */
4634 /* It should be used for the error status. */
4636 if (errno == EVMSERR) {
4637 STATUS_NATIVE = vaxc$errno;
4640 /* According to die_exit.t tests, if the child_exit code is */
4641 /* also zero, then we need to exit with a code of 255 */
4642 if ((errno != 0) && (errno < 256))
4643 STATUS_UNIX_EXIT_SET(errno);
4644 else if (STATUS_UNIX < 255) {
4645 STATUS_UNIX_EXIT_SET(255);
4650 /* The exit code could have been set by $? or vmsish which
4651 * means that it may not have fatal set. So convert
4652 * success/warning codes to fatal with out changing
4653 * the POSIX status code. The severity makes VMS native
4654 * status handling work, while UNIX mode programs use the
4655 * the POSIX exit codes.
4657 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4658 STATUS_NATIVE &= STS$M_COND_ID;
4659 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4663 /* Traditionally Perl on VMS always expects a Fatal Error. */
4664 if (vaxc$errno & 1) {
4666 /* So force success status to failure */
4667 if (STATUS_NATIVE & 1)
4672 STATUS_UNIX = EINTR; /* In case something cares */
4677 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4679 /* Encode the severity code */
4680 severity = STATUS_NATIVE & STS$M_SEVERITY;
4681 STATUS_UNIX = (severity ? severity : 1) << 8;
4683 /* Perl expects this to be a fatal error */
4684 if (severity != STS$K_SEVERE)
4693 STATUS_UNIX_SET(errno);
4695 exitstatus = STATUS_UNIX >> 8;
4696 if (exitstatus & 255)
4697 STATUS_UNIX_SET(exitstatus);
4699 STATUS_UNIX_SET(255);
4706 S_my_exit_jump(pTHX)
4711 SvREFCNT_dec(PL_e_script);
4715 POPSTACK_TO(PL_mainstack);
4723 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4726 const char * const p = SvPVX_const(PL_e_script);
4727 const char *nl = strchr(p, '\n');
4729 PERL_UNUSED_ARG(idx);
4730 PERL_UNUSED_ARG(maxlen);
4732 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4734 filter_del(read_e_script);
4737 sv_catpvn(buf_sv, p, nl-p);
4738 sv_chop(PL_e_script, nl);
4744 * c-indentation-style: bsd
4746 * indent-tabs-mode: t
4749 * ex: set ts=8 sts=4 sw=4 noet: