4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
7 * You may distribute under the terms of either the GNU General Public
8 * License or the Artistic License, as specified in the README file.
13 * A ship then new they built for him
14 * of mithril and of elven-glass
15 * --from Bilbo's song of EƤrendil
17 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
20 /* This file contains the top-level functions that are used to create, use
21 * and destroy a perl interpreter, plus the functions used by XS code to
22 * call back into perl. Note that it does not contain the actual main()
23 * function of the interpreter; that can be found in perlmain.c
27 #define PERL_IN_PERL_C
29 #include "patchlevel.h" /* for local_patches */
36 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
41 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
43 # include <sys/wait.h>
51 char control[CMSG_SPACE(sizeof(int))];
68 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
69 char *getenv (char *); /* Usually in <stdlib.h> */
72 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
74 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
75 /* Drop everything. Heck, don't even try to call it */
76 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
78 /* Drop almost everything */
79 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
82 #define CALL_BODY_EVAL(myop) \
83 if (PL_op == (myop)) \
84 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
88 #define CALL_BODY_SUB(myop) \
89 if (PL_op == (myop)) \
90 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
94 #define CALL_LIST_BODY(cv) \
95 PUSHMARK(PL_stack_sp); \
96 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
99 S_init_tls_and_interp(PerlInterpreter *my_perl)
103 PERL_SET_INTERP(my_perl);
104 #if defined(USE_ITHREADS)
107 PERL_SET_THX(my_perl);
110 MUTEX_INIT(&PL_dollarzero_mutex);
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_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
395 PL_registered_mros = newHV();
396 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
397 HvMAX(PL_registered_mros) = 0;
403 =for apidoc nothreadhook
405 Stub that provides thread hook for perl_destruct when there are
412 Perl_nothreadhook(pTHX)
418 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
420 Perl_dump_sv_child(pTHX_ SV *sv)
423 const int sock = PL_dumper_fd;
424 const int debug_fd = PerlIO_fileno(Perl_debug_log);
425 union control_un control;
428 struct cmsghdr *cmptr;
430 unsigned char buffer[256];
432 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
434 if(sock == -1 || debug_fd == -1)
437 PerlIO_flush(Perl_debug_log);
439 /* All these shenanigans are to pass a file descriptor over to our child for
440 it to dump out to. We can't let it hold open the file descriptor when it
441 forks, as the file descriptor it will dump to can turn out to be one end
442 of pipe that some other process will wait on for EOF. (So as it would
443 be open, the wait would be forever.) */
445 msg.msg_control = control.control;
446 msg.msg_controllen = sizeof(control.control);
447 /* We're a connected socket so we don't need a destination */
453 cmptr = CMSG_FIRSTHDR(&msg);
454 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
455 cmptr->cmsg_level = SOL_SOCKET;
456 cmptr->cmsg_type = SCM_RIGHTS;
457 *((int *)CMSG_DATA(cmptr)) = 1;
459 vec[0].iov_base = (void*)&sv;
460 vec[0].iov_len = sizeof(sv);
461 got = sendmsg(sock, &msg, 0);
464 perror("Debug leaking scalars parent sendmsg failed");
467 if(got < sizeof(sv)) {
468 perror("Debug leaking scalars parent short sendmsg");
472 /* Return protocol is
474 unsigned char: length of location string (0 for empty)
475 unsigned char*: string (not terminated)
477 vec[0].iov_base = (void*)&returned_errno;
478 vec[0].iov_len = sizeof(returned_errno);
479 vec[1].iov_base = buffer;
482 got = readv(sock, vec, 2);
485 perror("Debug leaking scalars parent read failed");
486 PerlIO_flush(PerlIO_stderr());
489 if(got < sizeof(returned_errno) + 1) {
490 perror("Debug leaking scalars parent short read");
491 PerlIO_flush(PerlIO_stderr());
496 got = read(sock, buffer + 1, *buffer);
498 perror("Debug leaking scalars parent read 2 failed");
499 PerlIO_flush(PerlIO_stderr());
504 perror("Debug leaking scalars parent short read 2");
505 PerlIO_flush(PerlIO_stderr());
510 if (returned_errno || *buffer) {
511 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
512 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
513 returned_errno, strerror(returned_errno));
519 =for apidoc perl_destruct
521 Shuts down a Perl interpreter. See L<perlembed>.
530 VOL signed char destruct_level; /* see possible values in intrpvar.h */
532 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
536 PERL_ARGS_ASSERT_PERL_DESTRUCT;
538 PERL_UNUSED_ARG(my_perl);
541 assert(PL_scopestack_ix == 1);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c)
565 call_list(PL_scopestack_ix, PL_endav);
570 assert(PL_scopestack_ix == 0);
572 /* Need to flush since END blocks can produce output */
575 if (CALL_FPTR(PL_threadhook)(aTHX)) {
576 /* Threads hook has vetoed further cleanup */
577 PL_veto_cleanup = TRUE;
581 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
582 if (destruct_level != 0) {
583 /* Fork here to create a child. Our child's job is to preserve the
584 state of scalars prior to destruction, so that we can instruct it
585 to dump any scalars that we later find have leaked.
586 There's no subtlety in this code - it assumes POSIX, and it doesn't
590 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
591 perror("Debug leaking scalars socketpair failed");
597 perror("Debug leaking scalars fork failed");
601 /* We are the child */
602 const int sock = fd[1];
603 const int debug_fd = PerlIO_fileno(Perl_debug_log);
606 /* Our success message is an integer 0, and a char 0 */
607 static const char success[sizeof(int) + 1] = {0};
611 /* We need to close all other file descriptors otherwise we end up
612 with interesting hangs, where the parent closes its end of a
613 pipe, and sits waiting for (another) child to terminate. Only
614 that child never terminates, because it never gets EOF, because
615 we also have the far end of the pipe open. We even need to
616 close the debugging fd, because sometimes it happens to be one
617 end of a pipe, and a process is waiting on the other end for
618 EOF. Normally it would be closed at some point earlier in
619 destruction, but if we happen to cause the pipe to remain open,
620 EOF never occurs, and we get an infinite hang. Hence all the
621 games to pass in a file descriptor if it's actually needed. */
623 f = sysconf(_SC_OPEN_MAX);
625 where = "sysconf failed";
636 union control_un control;
639 struct cmsghdr *cmptr;
643 msg.msg_control = control.control;
644 msg.msg_controllen = sizeof(control.control);
645 /* We're a connected socket so we don't need a source */
649 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
651 vec[0].iov_base = (void*)⌖
652 vec[0].iov_len = sizeof(target);
654 got = recvmsg(sock, &msg, 0);
659 where = "recv failed";
662 if(got < sizeof(target)) {
663 where = "short recv";
667 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
671 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
672 where = "wrong cmsg_len";
675 if(cmptr->cmsg_level != SOL_SOCKET) {
676 where = "wrong cmsg_level";
679 if(cmptr->cmsg_type != SCM_RIGHTS) {
680 where = "wrong cmsg_type";
684 got_fd = *(int*)CMSG_DATA(cmptr);
685 /* For our last little bit of trickery, put the file descriptor
686 back into Perl_debug_log, as if we never actually closed it
688 if(got_fd != debug_fd) {
689 if (dup2(got_fd, debug_fd) == -1) {
696 PerlIO_flush(Perl_debug_log);
698 got = write(sock, &success, sizeof(success));
701 where = "write failed";
704 if(got < sizeof(success)) {
705 where = "short write";
712 int send_errno = errno;
713 unsigned char length = (unsigned char) strlen(where);
714 struct iovec failure[3] = {
715 {(void*)&send_errno, sizeof(send_errno)},
717 {(void*)where, length}
719 int got = writev(sock, failure, 3);
720 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
721 in the parent if we try to read from the socketpair after the
722 child has exited, even if there was data to read.
723 So sleep a bit to give the parent a fighting chance of
726 _exit((got == -1) ? errno : 0);
730 PL_dumper_fd = fd[0];
735 /* We must account for everything. */
737 /* Destroy the main CV and syntax tree */
738 /* Do this now, because destroying ops can cause new SVs to be generated
739 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
740 PL_curcop to point to a valid op from which the filename structure
742 PL_curcop = &PL_compiling;
744 /* ensure comppad/curpad to refer to main's pad */
745 if (CvPADLIST(PL_main_cv)) {
746 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
748 op_free(PL_main_root);
751 PL_main_start = NULL;
752 SvREFCNT_dec(PL_main_cv);
756 /* Tell PerlIO we are about to tear things apart in case
757 we have layers which are using resources that should
761 PerlIO_destruct(aTHX);
763 if (PL_sv_objcount) {
765 * Try to destruct global references. We do this first so that the
766 * destructors and destructees still exist. Some sv's might remain.
767 * Non-referenced objects are on their own.
771 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
772 PL_defoutgv = NULL; /* may have been freed */
775 /* unhook hooks which will soon be, or use, destroyed data */
776 SvREFCNT_dec(PL_warnhook);
778 SvREFCNT_dec(PL_diehook);
781 /* call exit list functions */
782 while (PL_exitlistlen-- > 0)
783 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
785 Safefree(PL_exitlist);
790 SvREFCNT_dec(PL_registered_mros);
792 /* jettison our possibly duplicated environment */
793 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
794 * so we certainly shouldn't free it here
797 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
798 if (environ != PL_origenviron && !PL_use_safe_putenv
800 /* only main thread can free environ[0] contents */
801 && PL_curinterp == aTHX
807 for (i = 0; environ[i]; i++)
808 safesysfree(environ[i]);
810 /* Must use safesysfree() when working with environ. */
811 safesysfree(environ);
813 environ = PL_origenviron;
816 #endif /* !PERL_MICRO */
818 if (destruct_level == 0) {
820 DEBUG_P(debprofdump());
822 #if defined(PERLIO_LAYERS)
823 /* No more IO - including error messages ! */
824 PerlIO_cleanup(aTHX);
827 CopFILE_free(&PL_compiling);
828 CopSTASH_free(&PL_compiling);
830 /* The exit() function will do everything that needs doing. */
834 /* reset so print() ends up where we expect */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
843 SvREFCNT_dec(PL_regex_padav);
844 PL_regex_padav = NULL;
848 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
849 PL_stashcache = NULL;
851 /* loosen bonds of global variables */
853 /* XXX can PL_parser still be non-null here? */
854 if(PL_parser && PL_parser->rsfp) {
855 (void)PerlIO_close(PL_parser->rsfp);
856 PL_parser->rsfp = NULL;
860 Safefree(PL_splitstr);
870 PL_doswitches = FALSE;
871 PL_dowarn = G_WARN_OFF;
872 PL_doextract = FALSE;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
881 SvREFCNT_dec(PL_e_script);
887 /* magical thingies */
889 SvREFCNT_dec(PL_ofsgv); /* *, */
892 SvREFCNT_dec(PL_ors_sv); /* $\ */
895 SvREFCNT_dec(PL_rs); /* $/ */
898 Safefree(PL_osname); /* $^O */
901 SvREFCNT_dec(PL_statname);
905 /* defgv, aka *_ should be taken care of elsewhere */
907 /* clean up after study() */
908 SvREFCNT_dec(PL_lastscream);
909 PL_lastscream = NULL;
910 Safefree(PL_screamfirst);
912 Safefree(PL_screamnext);
916 Safefree(PL_efloatbuf);
920 /* startup and shutdown function lists */
921 SvREFCNT_dec(PL_beginav);
922 SvREFCNT_dec(PL_beginav_save);
923 SvREFCNT_dec(PL_endav);
924 SvREFCNT_dec(PL_checkav);
925 SvREFCNT_dec(PL_checkav_save);
926 SvREFCNT_dec(PL_unitcheckav);
927 SvREFCNT_dec(PL_unitcheckav_save);
928 SvREFCNT_dec(PL_initav);
930 PL_beginav_save = NULL;
933 PL_checkav_save = NULL;
934 PL_unitcheckav = NULL;
935 PL_unitcheckav_save = NULL;
938 /* shortcuts just get cleared */
947 PL_last_in_gv = NULL;
959 SvREFCNT_dec(PL_argvout_stack);
960 PL_argvout_stack = NULL;
962 SvREFCNT_dec(PL_modglobal);
964 SvREFCNT_dec(PL_preambleav);
965 PL_preambleav = NULL;
966 SvREFCNT_dec(PL_subname);
968 #ifdef PERL_USES_PL_PIDSTATUS
969 SvREFCNT_dec(PL_pidstatus);
972 SvREFCNT_dec(PL_toptarget);
974 SvREFCNT_dec(PL_bodytarget);
975 PL_bodytarget = NULL;
976 PL_formtarget = NULL;
978 /* free locale stuff */
979 #ifdef USE_LOCALE_COLLATE
980 Safefree(PL_collation_name);
981 PL_collation_name = NULL;
984 #ifdef USE_LOCALE_NUMERIC
985 Safefree(PL_numeric_name);
986 PL_numeric_name = NULL;
987 SvREFCNT_dec(PL_numeric_radix_sv);
988 PL_numeric_radix_sv = NULL;
991 /* clear utf8 character classes */
992 SvREFCNT_dec(PL_utf8_alnum);
993 SvREFCNT_dec(PL_utf8_ascii);
994 SvREFCNT_dec(PL_utf8_alpha);
995 SvREFCNT_dec(PL_utf8_space);
996 SvREFCNT_dec(PL_utf8_cntrl);
997 SvREFCNT_dec(PL_utf8_graph);
998 SvREFCNT_dec(PL_utf8_digit);
999 SvREFCNT_dec(PL_utf8_upper);
1000 SvREFCNT_dec(PL_utf8_lower);
1001 SvREFCNT_dec(PL_utf8_print);
1002 SvREFCNT_dec(PL_utf8_punct);
1003 SvREFCNT_dec(PL_utf8_xdigit);
1004 SvREFCNT_dec(PL_utf8_mark);
1005 SvREFCNT_dec(PL_utf8_toupper);
1006 SvREFCNT_dec(PL_utf8_totitle);
1007 SvREFCNT_dec(PL_utf8_tolower);
1008 SvREFCNT_dec(PL_utf8_tofold);
1009 SvREFCNT_dec(PL_utf8_idstart);
1010 SvREFCNT_dec(PL_utf8_idcont);
1011 PL_utf8_alnum = NULL;
1012 PL_utf8_ascii = NULL;
1013 PL_utf8_alpha = NULL;
1014 PL_utf8_space = NULL;
1015 PL_utf8_cntrl = NULL;
1016 PL_utf8_graph = NULL;
1017 PL_utf8_digit = NULL;
1018 PL_utf8_upper = NULL;
1019 PL_utf8_lower = NULL;
1020 PL_utf8_print = NULL;
1021 PL_utf8_punct = NULL;
1022 PL_utf8_xdigit = NULL;
1023 PL_utf8_mark = NULL;
1024 PL_utf8_toupper = NULL;
1025 PL_utf8_totitle = NULL;
1026 PL_utf8_tolower = NULL;
1027 PL_utf8_tofold = NULL;
1028 PL_utf8_idstart = NULL;
1029 PL_utf8_idcont = NULL;
1031 if (!specialWARN(PL_compiling.cop_warnings))
1032 PerlMemShared_free(PL_compiling.cop_warnings);
1033 PL_compiling.cop_warnings = NULL;
1034 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1035 PL_compiling.cop_hints_hash = NULL;
1036 CopFILE_free(&PL_compiling);
1037 CopSTASH_free(&PL_compiling);
1039 /* Prepare to destruct main symbol table. */
1044 SvREFCNT_dec(PL_curstname);
1045 PL_curstname = NULL;
1047 /* clear queued errors */
1048 SvREFCNT_dec(PL_errors);
1051 SvREFCNT_dec(PL_isarev);
1054 if (destruct_level >= 2) {
1055 if (PL_scopestack_ix != 0)
1056 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1057 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1058 (long)PL_scopestack_ix);
1059 if (PL_savestack_ix != 0)
1060 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1061 "Unbalanced saves: %ld more saves than restores\n",
1062 (long)PL_savestack_ix);
1063 if (PL_tmps_floor != -1)
1064 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1065 (long)PL_tmps_floor + 1);
1066 if (cxstack_ix != -1)
1067 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1068 (long)cxstack_ix + 1);
1071 /* Now absolutely destruct everything, somehow or other, loops or no. */
1073 /* the 2 is for PL_fdpid and PL_strtab */
1074 while (sv_clean_all() > 2)
1077 AvREAL_off(PL_fdpid); /* no surviving entries */
1078 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1081 #ifdef HAVE_INTERP_INTERN
1085 /* Destruct the global string table. */
1087 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1088 * so that sv_free() won't fail on them.
1089 * Now that the global string table is using a single hunk of memory
1090 * for both HE and HEK, we either need to explicitly unshare it the
1091 * correct way, or actually free things here.
1094 const I32 max = HvMAX(PL_strtab);
1095 HE * const * const array = HvARRAY(PL_strtab);
1096 HE *hent = array[0];
1099 if (hent && ckWARN_d(WARN_INTERNAL)) {
1100 HE * const next = HeNEXT(hent);
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1102 "Unbalanced string table refcount: (%ld) for \"%s\"",
1103 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1110 hent = array[riter];
1115 HvARRAY(PL_strtab) = 0;
1116 HvTOTALKEYS(PL_strtab) = 0;
1117 HvFILL(PL_strtab) = 0;
1119 SvREFCNT_dec(PL_strtab);
1122 /* free the pointer tables used for cloning */
1123 ptr_table_free(PL_ptr_table);
1124 PL_ptr_table = (PTR_TBL_t*)NULL;
1127 /* free special SVs */
1129 SvREFCNT(&PL_sv_yes) = 0;
1130 sv_clear(&PL_sv_yes);
1131 SvANY(&PL_sv_yes) = NULL;
1132 SvFLAGS(&PL_sv_yes) = 0;
1134 SvREFCNT(&PL_sv_no) = 0;
1135 sv_clear(&PL_sv_no);
1136 SvANY(&PL_sv_no) = NULL;
1137 SvFLAGS(&PL_sv_no) = 0;
1141 for (i=0; i<=2; i++) {
1142 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1143 sv_clear(PERL_DEBUG_PAD(i));
1144 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1145 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1149 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1150 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1152 #ifdef DEBUG_LEAKING_SCALARS
1153 if (PL_sv_count != 0) {
1158 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1159 svend = &sva[SvREFCNT(sva)];
1160 for (sv = sva + 1; sv < svend; ++sv) {
1161 if (SvTYPE(sv) != SVTYPEMASK) {
1162 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1164 " refcnt=%"UVuf pTHX__FORMAT "\n"
1165 "\tallocated at %s:%d %s %s%s\n",
1166 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1168 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1170 sv->sv_debug_inpad ? "for" : "by",
1171 sv->sv_debug_optype ?
1172 PL_op_name[sv->sv_debug_optype]: "(none)",
1173 sv->sv_debug_cloned ? " (cloned)" : ""
1175 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1176 Perl_dump_sv_child(aTHX_ sv);
1182 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1186 /* Wait for up to 4 seconds for child to terminate.
1187 This seems to be the least effort way of timing out on reaping
1189 struct timeval waitfor = {4, 0};
1190 int sock = PL_dumper_fd;
1194 FD_SET(sock, &rset);
1195 select(sock + 1, &rset, NULL, NULL, &waitfor);
1196 waitpid(child, &status, WNOHANG);
1201 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1207 #ifdef PERL_DEBUG_READONLY_OPS
1213 #if defined(PERLIO_LAYERS)
1214 /* No more IO - including error messages ! */
1215 PerlIO_cleanup(aTHX);
1218 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1219 as currently layers use it rather than NULL as a marker
1220 for no arg - and will try and SvREFCNT_dec it.
1222 SvREFCNT(&PL_sv_undef) = 0;
1223 SvREADONLY_off(&PL_sv_undef);
1225 Safefree(PL_origfilename);
1226 PL_origfilename = NULL;
1227 Safefree(PL_reg_start_tmp);
1228 PL_reg_start_tmp = (char**)NULL;
1229 PL_reg_start_tmpl = 0;
1230 Safefree(PL_reg_curpm);
1231 Safefree(PL_reg_poscache);
1232 free_tied_hv_pool();
1233 Safefree(PL_op_mask);
1234 Safefree(PL_psig_name);
1235 PL_psig_name = (SV**)NULL;
1236 PL_psig_ptr = (SV**)NULL;
1237 Safefree(PL_psig_pend);
1238 PL_psig_pend = (int*)NULL;
1240 /* We need to NULL PL_psig_pend first, so that
1241 signal handlers know not to use it */
1242 int *psig_save = PL_psig_pend;
1243 PL_psig_pend = (int*)NULL;
1244 Safefree(psig_save);
1248 PL_tainting = FALSE;
1249 PL_taint_warn = FALSE;
1250 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1253 DEBUG_P(debprofdump());
1255 #ifdef USE_REENTRANT_API
1256 Perl_reentrant_free(aTHX);
1261 while (PL_regmatch_slab) {
1262 regmatch_slab *s = PL_regmatch_slab;
1263 PL_regmatch_slab = PL_regmatch_slab->next;
1267 /* As the absolutely last thing, free the non-arena SV for mess() */
1270 /* we know that type == SVt_PVMG */
1272 /* it could have accumulated taint magic */
1275 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1276 moremagic = mg->mg_moremagic;
1277 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1279 Safefree(mg->mg_ptr);
1283 /* we know that type >= SVt_PV */
1284 SvPV_free(PL_mess_sv);
1285 Safefree(SvANY(PL_mess_sv));
1286 Safefree(PL_mess_sv);
1293 =for apidoc perl_free
1295 Releases a Perl interpreter. See L<perlembed>.
1305 PERL_ARGS_ASSERT_PERL_FREE;
1307 if (PL_veto_cleanup)
1310 #ifdef PERL_TRACK_MEMPOOL
1313 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1314 * value as we're probably hunting memory leaks then
1316 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1317 if (!s || atoi(s) == 0) {
1318 const U32 old_debug = PL_debug;
1319 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1320 thread at thread exit. */
1322 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1323 "free this thread's memory\n");
1324 PL_debug &= ~ DEBUG_m_FLAG;
1326 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1327 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1328 PL_debug = old_debug;
1333 #if defined(WIN32) || defined(NETWARE)
1334 # if defined(PERL_IMPLICIT_SYS)
1337 void *host = nw_internal_host;
1339 void *host = w32_internal_host;
1341 PerlMem_free(aTHXx);
1343 nw_delete_internal_host(host);
1345 win32_delete_internal_host(host);
1349 PerlMem_free(aTHXx);
1352 PerlMem_free(aTHXx);
1356 #if defined(USE_ITHREADS)
1357 /* provide destructors to clean up the thread key when libperl is unloaded */
1358 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1360 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1361 #pragma fini "perl_fini"
1362 #elif defined(__sun) && !defined(__GNUC__)
1363 #pragma fini (perl_fini)
1367 #if defined(__GNUC__)
1368 __attribute__((destructor))
1373 if (PL_curinterp && !PL_veto_cleanup)
1378 #endif /* THREADS */
1381 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1384 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1385 PL_exitlist[PL_exitlistlen].fn = fn;
1386 PL_exitlist[PL_exitlistlen].ptr = ptr;
1390 #ifdef HAS_PROCSELFEXE
1391 /* This is a function so that we don't hold on to MAXPATHLEN
1392 bytes of stack longer than necessary
1395 S_procself_val(pTHX_ SV *sv, const char *arg0)
1397 char buf[MAXPATHLEN];
1398 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1400 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1401 includes a spurious NUL which will cause $^X to fail in system
1402 or backticks (this will prevent extensions from being built and
1403 many tests from working). readlink is not meant to add a NUL.
1404 Normal readlink works fine.
1406 if (len > 0 && buf[len-1] == '\0') {
1410 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1411 returning the text "unknown" from the readlink rather than the path
1412 to the executable (or returning an error from the readlink). Any valid
1413 path has a '/' in it somewhere, so use that to validate the result.
1414 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1416 if (len > 0 && memchr(buf, '/', len)) {
1417 sv_setpvn(sv,buf,len);
1423 #endif /* HAS_PROCSELFEXE */
1426 S_set_caret_X(pTHX) {
1428 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1430 #ifdef HAS_PROCSELFEXE
1431 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1434 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1436 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1443 =for apidoc perl_parse
1445 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1451 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1458 PERL_ARGS_ASSERT_PERL_PARSE;
1459 #ifndef MULTIPLICITY
1460 PERL_UNUSED_ARG(my_perl);
1463 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1464 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1465 * This MUST be done before any hash stores or fetches take place.
1466 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1467 * yourself, it is your responsibility to provide a good random seed!
1468 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1469 if (!PL_rehash_seed_set)
1470 PL_rehash_seed = get_hash_seed();
1472 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1474 if (s && (atoi(s) == 1))
1475 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1477 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1482 if (PL_origalen != 0) {
1483 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1486 /* Set PL_origalen be the sum of the contiguous argv[]
1487 * elements plus the size of the env in case that it is
1488 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1489 * as the maximum modifiable length of $0. In the worst case
1490 * the area we are able to modify is limited to the size of
1491 * the original argv[0]. (See below for 'contiguous', though.)
1493 const char *s = NULL;
1496 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1497 /* Do the mask check only if the args seem like aligned. */
1499 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1501 /* See if all the arguments are contiguous in memory. Note
1502 * that 'contiguous' is a loose term because some platforms
1503 * align the argv[] and the envp[]. If the arguments look
1504 * like non-aligned, assume that they are 'strictly' or
1505 * 'traditionally' contiguous. If the arguments look like
1506 * aligned, we just check that they are within aligned
1507 * PTRSIZE bytes. As long as no system has something bizarre
1508 * like the argv[] interleaved with some other data, we are
1509 * fine. (Did I just evoke Murphy's Law?) --jhi */
1510 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1512 for (i = 1; i < PL_origargc; i++) {
1513 if ((PL_origargv[i] == s + 1
1515 || PL_origargv[i] == s + 2
1520 (PL_origargv[i] > s &&
1522 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1533 #ifndef PERL_USE_SAFE_PUTENV
1534 /* Can we grab env area too to be used as the area for $0? */
1535 if (s && PL_origenviron && !PL_use_safe_putenv) {
1536 if ((PL_origenviron[0] == s + 1)
1539 (PL_origenviron[0] > s &&
1540 PL_origenviron[0] <=
1541 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1544 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1545 s = PL_origenviron[0];
1548 my_setenv("NoNe SuCh", NULL);
1549 /* Force copy of environment. */
1550 for (i = 1; PL_origenviron[i]; i++) {
1551 if (PL_origenviron[i] == s + 1
1554 (PL_origenviron[i] > s &&
1555 PL_origenviron[i] <=
1556 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1559 s = PL_origenviron[i];
1567 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1569 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1574 /* Come here if running an undumped a.out. */
1576 PL_origfilename = savepv(argv[0]);
1577 PL_do_undump = FALSE;
1578 cxstack_ix = -1; /* start label stack again */
1580 assert (!PL_tainted);
1582 S_set_caret_X(aTHX);
1584 init_postdump_symbols(argc,argv,env);
1589 op_free(PL_main_root);
1590 PL_main_root = NULL;
1592 PL_main_start = NULL;
1593 SvREFCNT_dec(PL_main_cv);
1597 oldscope = PL_scopestack_ix;
1598 PL_dowarn = G_WARN_OFF;
1603 parse_body(env,xsinit);
1605 call_list(oldscope, PL_unitcheckav);
1607 call_list(oldscope, PL_checkav);
1614 /* my_exit() was called */
1615 while (PL_scopestack_ix > oldscope)
1618 PL_curstash = PL_defstash;
1620 call_list(oldscope, PL_unitcheckav);
1622 call_list(oldscope, PL_checkav);
1626 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1634 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1635 miniperl, and we need to see those flags reflected in the values here. */
1637 /* What this returns is subject to change. Use the public interface in Config.
1640 S_Internals_V(pTHX_ CV *cv)
1643 #ifdef LOCAL_PATCH_COUNT
1644 const int local_patch_count = LOCAL_PATCH_COUNT;
1646 const int local_patch_count = 0;
1648 const int entries = 3 + local_patch_count;
1650 static char non_bincompat_options[] =
1657 # ifdef PERL_DISABLE_PMC
1660 # ifdef PERL_DONT_CREATE_GVSV
1661 " PERL_DONT_CREATE_GVSV"
1663 # ifdef PERL_IS_MINIPERL
1666 # ifdef PERL_MALLOC_WRAP
1669 # ifdef PERL_MEM_LOG
1672 # ifdef PERL_MEM_LOG_NOIMPL
1673 " PERL_MEM_LOG_NOIMPL"
1675 # ifdef PERL_USE_DEVEL
1678 # ifdef PERL_USE_SAFE_PUTENV
1679 " PERL_USE_SAFE_PUTENV"
1681 # ifdef USE_SITECUSTOMIZE
1682 " USE_SITECUSTOMIZE"
1684 # ifdef USE_FAST_STDIO
1688 PERL_UNUSED_ARG(cv);
1689 PERL_UNUSED_ARG(items);
1691 EXTEND(SP, entries);
1693 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1694 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1695 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1699 PUSHs(Perl_newSVpvn_flags(aTHX_
1700 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1703 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1707 PUSHs(&PL_sv_undef);
1710 for (i = 1; i <= local_patch_count; i++) {
1711 /* This will be an undef, if PL_localpatches[i] is NULL. */
1712 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1718 #define INCPUSH_UNSHIFT 0x01
1719 #define INCPUSH_ADD_OLD_VERS 0x02
1720 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1721 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1722 #define INCPUSH_NOT_BASEDIR 0x10
1723 #define INCPUSH_CAN_RELOCATE 0x20
1724 #define INCPUSH_ADD_SUB_DIRS \
1725 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1728 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1732 int argc = PL_origargc;
1733 char **argv = PL_origargv;
1734 const char *scriptname = NULL;
1735 VOL bool dosearch = FALSE;
1737 const char *cddir = NULL;
1738 #ifdef USE_SITECUSTOMIZE
1739 bool minus_f = FALSE;
1741 SV *linestr_sv = newSV_type(SVt_PVIV);
1742 bool add_read_e_script = FALSE;
1744 SvGROW(linestr_sv, 80);
1745 sv_setpvs(linestr_sv,"");
1751 for (argc--,argv++; argc > 0; argc--,argv++) {
1752 if (argv[0][0] != '-' || !argv[0][1])
1758 #ifndef PERL_STRICT_CR
1782 if ((s = moreswitches(s)))
1787 CHECK_MALLOC_TOO_LATE_FOR('t');
1788 if( !PL_tainting ) {
1789 PL_taint_warn = TRUE;
1795 CHECK_MALLOC_TOO_LATE_FOR('T');
1797 PL_taint_warn = FALSE;
1805 forbid_setid('e', FALSE);
1807 PL_e_script = newSVpvs("");
1808 add_read_e_script = TRUE;
1811 sv_catpv(PL_e_script, s);
1813 sv_catpv(PL_e_script, argv[1]);
1817 Perl_croak(aTHX_ "No code specified for -%c", c);
1818 sv_catpvs(PL_e_script, "\n");
1822 #ifdef USE_SITECUSTOMIZE
1828 case 'I': /* -I handled both here and in moreswitches() */
1829 forbid_setid('I', FALSE);
1830 if (!*++s && (s=argv[1]) != NULL) {
1834 STRLEN len = strlen(s);
1835 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1838 Perl_croak(aTHX_ "No directory specified for -I");
1841 forbid_setid('S', FALSE);
1850 opts_prog = newSVpvs("use Config; Config::_V()");
1854 opts_prog = Perl_newSVpvf(aTHX_
1855 "use Config; Config::config_vars(qw%c%s%c)",
1859 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1860 /* don't look for script or read stdin */
1861 scriptname = BIT_BUCKET;
1865 PL_doextract = TRUE;
1873 if (!*++s || isSPACE(*s)) {
1877 /* catch use of gnu style long options */
1878 if (strEQ(s, "version")) {
1882 if (strEQ(s, "help")) {
1889 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1900 #ifndef SECURE_INTERNAL_GETENV
1903 (s = PerlEnv_getenv("PERL5OPT")))
1907 if (*s == '-' && *(s+1) == 'T') {
1908 CHECK_MALLOC_TOO_LATE_FOR('T');
1910 PL_taint_warn = FALSE;
1913 char *popt_copy = NULL;
1926 if (!strchr("CDIMUdmtwW", *s))
1927 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1931 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1932 s = popt_copy + (s - d);
1940 if( !PL_tainting ) {
1941 PL_taint_warn = TRUE;
1952 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1954 /* SITELIB_EXP is a function call on Win32.
1955 The games with local $! are to avoid setting errno if there is no
1956 sitecustomize script. */
1957 const char *const sitelib = SITELIB_EXP;
1958 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1960 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1965 scriptname = argv[0];
1968 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1970 else if (scriptname == NULL) {
1972 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1978 /* Set $^X early so that it can be used for relocatable paths in @INC */
1979 assert (!PL_tainted);
1981 S_set_caret_X(aTHX);
1986 bool suidscript = FALSE;
1988 open_script(scriptname, dosearch, &suidscript, &rsfp);
1990 validate_suid(validarg, scriptname, fdscript, suidscript,
1994 # if defined(SIGCHLD) || defined(SIGCLD)
1997 # define SIGCHLD SIGCLD
1999 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2000 if (sigstate == (Sighandler_t) SIG_IGN) {
2001 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2002 "Can't ignore signal CHLD, forcing to default");
2003 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2011 /* This will croak if suidscript is true, as -x cannot be used with
2013 forbid_setid('x', suidscript);
2014 /* Hence you can't get here if suidscript is true */
2016 find_beginning(linestr_sv, rsfp);
2017 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2018 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2022 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2023 CvUNIQUE_on(PL_compcv);
2025 CvPADLIST(PL_compcv) = pad_new(0);
2027 PL_isarev = newHV();
2030 boot_core_UNIVERSAL();
2032 newXS("Internals::V", S_Internals_V, __FILE__);
2035 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2037 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2043 # ifdef HAS_SOCKS5_INIT
2044 socks5_init(argv[0]);
2050 init_predump_symbols();
2051 /* init_postdump_symbols not currently designed to be called */
2052 /* more than once (ENV isn't cleared first, for example) */
2053 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2055 init_postdump_symbols(argc,argv,env);
2057 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2058 * or explicitly in some platforms.
2059 * locale.c:Perl_init_i18nl10n() if the environment
2060 * look like the user wants to use UTF-8. */
2061 #if defined(__SYMBIAN32__)
2062 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2064 # ifndef PERL_IS_MINIPERL
2066 /* Requires init_predump_symbols(). */
2067 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2072 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2073 * and the default open disciplines. */
2074 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2075 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2077 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2078 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2079 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2081 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2082 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2083 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2085 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2086 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2087 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2089 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2090 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2093 sv_setpvs(sv, ":utf8\0:utf8");
2095 sv_setpvs(sv, ":utf8\0");
2098 sv_setpvs(sv, "\0:utf8");
2107 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2108 if (strEQ(s, "unsafe"))
2109 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2110 else if (strEQ(s, "safe"))
2111 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2113 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2120 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2124 PL_xmlfp = PerlIO_stdout();
2126 PL_xmlfp = PerlIO_open(s, "w");
2128 Perl_croak(aTHX_ "Can't open %s", s);
2130 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2136 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2137 PL_madskills = atoi(s);
2138 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2143 lex_start(linestr_sv, rsfp, TRUE);
2144 PL_subname = newSVpvs("main");
2146 if (add_read_e_script)
2147 filter_add(read_e_script, NULL);
2149 /* now parse the script */
2151 SETERRNO(0,SS_NORMAL);
2152 if (yyparse() || PL_parser->error_count) {
2154 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2156 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2160 CopLINE_set(PL_curcop, 0);
2161 PL_curstash = PL_defstash;
2163 SvREFCNT_dec(PL_e_script);
2171 SAVECOPFILE(PL_curcop);
2172 SAVECOPLINE(PL_curcop);
2173 gv_check(PL_defstash);
2182 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2183 dump_mstats("after compilation:");
2193 =for apidoc perl_run
2195 Tells a Perl interpreter to run. See L<perlembed>.
2208 PERL_ARGS_ASSERT_PERL_RUN;
2209 #ifndef MULTIPLICITY
2210 PERL_UNUSED_ARG(my_perl);
2213 oldscope = PL_scopestack_ix;
2221 cxstack_ix = -1; /* start context stack again */
2223 case 0: /* normal completion */
2227 case 2: /* my_exit() */
2228 while (PL_scopestack_ix > oldscope)
2231 PL_curstash = PL_defstash;
2232 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2233 PL_endav && !PL_minus_c)
2234 call_list(oldscope, PL_endav);
2236 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2237 dump_mstats("after execution: ");
2243 POPSTACK_TO(PL_mainstack);
2246 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2257 S_run_body(pTHX_ I32 oldscope)
2260 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2261 PL_sawampersand ? "Enabling" : "Omitting"));
2263 if (!PL_restartop) {
2267 exit(0); /* less likely to core dump than my_exit(0) */
2271 if (DEBUG_x_TEST || DEBUG_B_TEST)
2272 dump_all_perl(!DEBUG_B_TEST);
2274 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2278 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2281 if (PERLDB_SINGLE && PL_DBsingle)
2282 sv_setiv(PL_DBsingle, 1);
2284 call_list(oldscope, PL_initav);
2285 #ifdef PERL_DEBUG_READONLY_OPS
2286 Perl_pending_Slabs_to_ro(aTHX);
2293 PL_op = PL_restartop;
2297 else if (PL_main_start) {
2298 CvDEPTH(PL_main_cv) = 1;
2299 PL_op = PL_main_start;
2307 =head1 SV Manipulation Functions
2309 =for apidoc p||get_sv
2311 Returns the SV of the specified Perl scalar. C<flags> are passed to
2312 C<gv_fetchpv>. If C<GV_ADD> is set and the
2313 Perl variable does not exist then it will be created. If C<flags> is zero
2314 and the variable does not exist then NULL is returned.
2320 Perl_get_sv(pTHX_ const char *name, I32 flags)
2324 PERL_ARGS_ASSERT_GET_SV;
2326 gv = gv_fetchpv(name, flags, SVt_PV);
2333 =head1 Array Manipulation Functions
2335 =for apidoc p||get_av
2337 Returns the AV of the specified Perl array. C<flags> are passed to
2338 C<gv_fetchpv>. If C<GV_ADD> is set and the
2339 Perl variable does not exist then it will be created. If C<flags> is zero
2340 and the variable does not exist then NULL is returned.
2346 Perl_get_av(pTHX_ const char *name, I32 flags)
2348 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2350 PERL_ARGS_ASSERT_GET_AV;
2360 =head1 Hash Manipulation Functions
2362 =for apidoc p||get_hv
2364 Returns the HV of the specified Perl hash. C<flags> are passed to
2365 C<gv_fetchpv>. If C<GV_ADD> is set and the
2366 Perl variable does not exist then it will be created. If C<flags> is zero
2367 and the variable does not exist then NULL is returned.
2373 Perl_get_hv(pTHX_ const char *name, I32 flags)
2375 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2377 PERL_ARGS_ASSERT_GET_HV;
2387 =head1 CV Manipulation Functions
2389 =for apidoc p||get_cvn_flags
2391 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2392 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2393 exist then it will be declared (which has the same effect as saying
2394 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2395 then NULL is returned.
2397 =for apidoc p||get_cv
2399 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2405 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2407 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2408 /* XXX this is probably not what they think they're getting.
2409 * It has the same effect as "sub name;", i.e. just a forward
2412 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2414 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2415 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2416 return newSUB(start_subparse(FALSE, 0),
2417 newSVOP(OP_CONST, 0, sv),
2425 /* Nothing in core calls this now, but we can't replace it with a macro and
2426 move it to mathoms.c as a macro would evaluate name twice. */
2428 Perl_get_cv(pTHX_ const char *name, I32 flags)
2430 PERL_ARGS_ASSERT_GET_CV;
2432 return get_cvn_flags(name, strlen(name), flags);
2435 /* Be sure to refetch the stack pointer after calling these routines. */
2439 =head1 Callback Functions
2441 =for apidoc p||call_argv
2443 Performs a callback to the specified Perl sub. See L<perlcall>.
2449 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2451 /* See G_* flags in cop.h */
2452 /* null terminated arg list */
2457 PERL_ARGS_ASSERT_CALL_ARGV;
2462 mXPUSHs(newSVpv(*argv,0));
2467 return call_pv(sub_name, flags);
2471 =for apidoc p||call_pv
2473 Performs a callback to the specified Perl sub. See L<perlcall>.
2479 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2480 /* name of the subroutine */
2481 /* See G_* flags in cop.h */
2483 PERL_ARGS_ASSERT_CALL_PV;
2485 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2489 =for apidoc p||call_method
2491 Performs a callback to the specified Perl method. The blessed object must
2492 be on the stack. See L<perlcall>.
2498 Perl_call_method(pTHX_ const char *methname, I32 flags)
2499 /* name of the subroutine */
2500 /* See G_* flags in cop.h */
2503 PERL_ARGS_ASSERT_CALL_METHOD;
2505 len = strlen(methname);
2507 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2508 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2511 /* May be called with any of a CV, a GV, or an SV containing the name. */
2513 =for apidoc p||call_sv
2515 Performs a callback to the Perl sub whose name is in the SV. See
2522 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2523 /* See G_* flags in cop.h */
2526 LOGOP myop; /* fake syntax tree node */
2531 bool oldcatch = CATCH_GET;
2533 OP* const oldop = PL_op;
2536 PERL_ARGS_ASSERT_CALL_SV;
2538 if (flags & G_DISCARD) {
2542 if (!(flags & G_WANT)) {
2543 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2548 Zero(&myop, 1, LOGOP);
2549 myop.op_next = NULL;
2550 if (!(flags & G_NOARGS))
2551 myop.op_flags |= OPf_STACKED;
2552 myop.op_flags |= OP_GIMME_REVERSE(flags);
2556 EXTEND(PL_stack_sp, 1);
2557 *++PL_stack_sp = sv;
2559 oldscope = PL_scopestack_ix;
2561 if (PERLDB_SUB && PL_curstash != PL_debstash
2562 /* Handle first BEGIN of -d. */
2563 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2564 /* Try harder, since this may have been a sighandler, thus
2565 * curstash may be meaningless. */
2566 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2567 && !(flags & G_NODEBUG))
2568 PL_op->op_private |= OPpENTERSUB_DB;
2570 if (flags & G_METHOD) {
2571 Zero(&method_op, 1, UNOP);
2572 method_op.op_next = PL_op;
2573 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2574 method_op.op_type = OP_METHOD;
2575 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2576 myop.op_type = OP_ENTERSUB;
2577 PL_op = (OP*)&method_op;
2580 if (!(flags & G_EVAL)) {
2582 CALL_BODY_SUB((OP*)&myop);
2583 retval = PL_stack_sp - (PL_stack_base + oldmark);
2584 CATCH_SET(oldcatch);
2587 myop.op_other = (OP*)&myop;
2589 create_eval_scope(flags|G_FAKINGEVAL);
2597 CALL_BODY_SUB((OP*)&myop);
2598 retval = PL_stack_sp - (PL_stack_base + oldmark);
2599 if (!(flags & G_KEEPERR)) {
2607 /* my_exit() was called */
2608 PL_curstash = PL_defstash;
2615 PL_op = PL_restartop;
2619 PL_stack_sp = PL_stack_base + oldmark;
2620 if ((flags & G_WANT) == G_ARRAY)
2624 *++PL_stack_sp = &PL_sv_undef;
2629 if (PL_scopestack_ix > oldscope)
2630 delete_eval_scope();
2634 if (flags & G_DISCARD) {
2635 PL_stack_sp = PL_stack_base + oldmark;
2644 /* Eval a string. The G_EVAL flag is always assumed. */
2647 =for apidoc p||eval_sv
2649 Tells Perl to C<eval> the string in the SV.
2655 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2657 /* See G_* flags in cop.h */
2661 UNOP myop; /* fake syntax tree node */
2662 VOL I32 oldmark = SP - PL_stack_base;
2665 OP* const oldop = PL_op;
2668 PERL_ARGS_ASSERT_EVAL_SV;
2670 if (flags & G_DISCARD) {
2677 Zero(PL_op, 1, UNOP);
2678 EXTEND(PL_stack_sp, 1);
2679 *++PL_stack_sp = sv;
2681 if (!(flags & G_NOARGS))
2682 myop.op_flags = OPf_STACKED;
2683 myop.op_next = NULL;
2684 myop.op_type = OP_ENTEREVAL;
2685 myop.op_flags |= OP_GIMME_REVERSE(flags);
2686 if (flags & G_KEEPERR)
2687 myop.op_flags |= OPf_SPECIAL;
2689 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2690 * before a PUSHEVAL, which corrupts the stack after a croak */
2691 TAINT_PROPER("eval_sv()");
2697 CALL_BODY_EVAL((OP*)&myop);
2698 retval = PL_stack_sp - (PL_stack_base + oldmark);
2699 if (!(flags & G_KEEPERR)) {
2707 /* my_exit() was called */
2708 PL_curstash = PL_defstash;
2715 PL_op = PL_restartop;
2719 PL_stack_sp = PL_stack_base + oldmark;
2720 if ((flags & G_WANT) == G_ARRAY)
2724 *++PL_stack_sp = &PL_sv_undef;
2730 if (flags & G_DISCARD) {
2731 PL_stack_sp = PL_stack_base + oldmark;
2741 =for apidoc p||eval_pv
2743 Tells Perl to C<eval> the given string and return an SV* result.
2749 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2753 SV* sv = newSVpv(p, 0);
2755 PERL_ARGS_ASSERT_EVAL_PV;
2757 eval_sv(sv, G_SCALAR);
2764 if (croak_on_error && SvTRUE(ERRSV)) {
2765 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2771 /* Require a module. */
2774 =head1 Embedding Functions
2776 =for apidoc p||require_pv
2778 Tells Perl to C<require> the file named by the string argument. It is
2779 analogous to the Perl code C<eval "require '$file'">. It's even
2780 implemented that way; consider using load_module instead.
2785 Perl_require_pv(pTHX_ const char *pv)
2791 PERL_ARGS_ASSERT_REQUIRE_PV;
2793 PUSHSTACKi(PERLSI_REQUIRE);
2795 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2796 eval_sv(sv_2mortal(sv), G_DISCARD);
2802 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2804 /* This message really ought to be max 23 lines.
2805 * Removed -h because the user already knows that option. Others? */
2807 static const char * const usage_msg[] = {
2808 "-0[octal] specify record separator (\\0, if no argument)",
2809 "-a autosplit mode with -n or -p (splits $_ into @F)",
2810 "-C[number/list] enables the listed Unicode features",
2811 "-c check syntax only (runs BEGIN and CHECK blocks)",
2812 "-d[:debugger] run program under debugger",
2813 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2814 "-e program one line of program (several -e's allowed, omit programfile)",
2815 "-E program like -e, but enables all optional features",
2816 "-f don't do $sitelib/sitecustomize.pl at startup",
2817 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2818 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2819 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2820 "-l[octal] enable line ending processing, specifies line terminator",
2821 "-[mM][-]module execute \"use/no module...\" before executing program",
2822 "-n assume \"while (<>) { ... }\" loop around program",
2823 "-p assume loop like -n but print line also, like sed",
2824 "-s enable rudimentary parsing for switches after programfile",
2825 "-S look for programfile using PATH environment variable",
2826 "-t enable tainting warnings",
2827 "-T enable tainting checks",
2828 "-u dump core after parsing program",
2829 "-U allow unsafe operations",
2830 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2831 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2832 "-w enable many useful warnings (RECOMMENDED)",
2833 "-W enable all warnings",
2834 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2835 "-X disable all warnings",
2839 const char * const *p = usage_msg;
2841 PERL_ARGS_ASSERT_USAGE;
2843 PerlIO_printf(PerlIO_stdout(),
2844 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2847 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2850 /* convert a string of -D options (or digits) into an int.
2851 * sets *s to point to the char after the options */
2855 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2857 static const char * const usage_msgd[] = {
2858 " Debugging flag values: (see also -d)",
2859 " p Tokenizing and parsing (with v, displays parse stack)",
2860 " s Stack snapshots (with v, displays all stacks)",
2861 " l Context (loop) stack processing",
2862 " t Trace execution",
2863 " o Method and overloading resolution",
2864 " c String/numeric conversions",
2865 " P Print profiling info, source file input state",
2866 " m Memory and SV allocation",
2867 " f Format processing",
2868 " r Regular expression parsing and execution",
2869 " x Syntax tree dump",
2870 " u Tainting checks",
2871 " H Hash dump -- usurps values()",
2872 " X Scratchpad allocation",
2875 " R Include reference counts of dumped variables (eg when using -Ds)",
2876 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2877 " v Verbose: use in conjunction with other flags",
2879 " A Consistency checks on internal structures",
2880 " q quiet - currently only suppresses the 'EXECUTING' message",
2881 " M trace smart match resolution",
2882 " B dump suBroutine definitions, including special Blocks like BEGIN",
2887 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2890 /* if adding extra options, remember to update DEBUG_MASK */
2891 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2893 for (; isALNUM(**s); (*s)++) {
2894 const char * const d = strchr(debopts,**s);
2896 i |= 1 << (d - debopts);
2897 else if (ckWARN_d(WARN_DEBUGGING))
2898 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2899 "invalid option -D%c, use -D'' to see choices\n", **s);
2902 else if (isDIGIT(**s)) {
2904 for (; isALNUM(**s); (*s)++) ;
2906 else if (givehelp) {
2907 const char *const *p = usage_msgd;
2908 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2911 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2912 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2913 "-Dp not implemented on this platform\n");
2919 /* This routine handles any switches that can be given during run */
2922 Perl_moreswitches(pTHX_ const char *s)
2926 const char option = *s; /* used to remember option in -m/-M code */
2928 PERL_ARGS_ASSERT_MORESWITCHES;
2936 SvREFCNT_dec(PL_rs);
2937 if (s[1] == 'x' && s[2]) {
2938 const char *e = s+=2;
2944 flags = PERL_SCAN_SILENT_ILLDIGIT;
2945 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2946 if (s + numlen < e) {
2947 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2951 PL_rs = newSVpvs("");
2952 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2953 tmps = (U8*)SvPVX(PL_rs);
2954 uvchr_to_utf8(tmps, rschar);
2955 SvCUR_set(PL_rs, UNISKIP(rschar));
2960 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2961 if (rschar & ~((U8)~0))
2962 PL_rs = &PL_sv_undef;
2963 else if (!rschar && numlen >= 2)
2964 PL_rs = newSVpvs("");
2966 char ch = (char)rschar;
2967 PL_rs = newSVpvn(&ch, 1);
2970 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2975 PL_unicode = parse_unicode_opts( (const char **)&s );
2976 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2982 while (*s && !isSPACE(*s)) ++s;
2983 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2994 forbid_setid('d', FALSE);
2997 /* -dt indicates to the debugger that threads will be used */
2998 if (*s == 't' && !isALNUM(s[1])) {
3000 my_setenv("PERL5DB_THREADED", "1");
3003 /* The following permits -d:Mod to accepts arguments following an =
3004 in the fashion that -MSome::Mod does. */
3005 if (*s == ':' || *s == '=') {
3006 const char *start = ++s;
3007 const char *const end = s + strlen(s);
3008 SV * const sv = newSVpvs("use Devel::");
3010 /* We now allow -d:Module=Foo,Bar */
3011 while(isALNUM(*s) || *s==':') ++s;
3013 sv_catpvn(sv, start, end - start);
3015 sv_catpvn(sv, start, s-start);
3016 /* Don't use NUL as q// delimiter here, this string goes in the
3018 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3021 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3025 PL_perldb = PERLDB_ALL;
3032 forbid_setid('D', FALSE);
3034 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3035 #else /* !DEBUGGING */
3036 if (ckWARN_d(WARN_DEBUGGING))
3037 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3038 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3039 for (s++; isALNUM(*s); s++) ;
3044 usage(PL_origargv[0]);
3047 Safefree(PL_inplace);
3048 #if defined(__CYGWIN__) /* do backup extension automagically */
3049 if (*(s+1) == '\0') {
3050 PL_inplace = savepvs(".bak");
3053 #endif /* __CYGWIN__ */
3055 const char * const start = ++s;
3056 while (*s && !isSPACE(*s))
3059 PL_inplace = savepvn(start, s - start);
3063 if (*s == '-') /* Additional switches on #! line. */
3067 case 'I': /* -I handled both here and in parse_body() */
3068 forbid_setid('I', FALSE);
3070 while (*s && isSPACE(*s))
3075 /* ignore trailing spaces (possibly followed by other switches) */
3077 for (e = p; *e && !isSPACE(*e); e++) ;
3081 } while (*p && *p != '-');
3083 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3089 Perl_croak(aTHX_ "No directory specified for -I");
3095 SvREFCNT_dec(PL_ors_sv);
3101 PL_ors_sv = newSVpvs("\n");
3102 numlen = 3 + (*s == '0');
3103 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3107 if (RsPARA(PL_rs)) {
3108 PL_ors_sv = newSVpvs("\n\n");
3111 PL_ors_sv = newSVsv(PL_rs);
3116 forbid_setid('M', FALSE); /* XXX ? */
3119 forbid_setid('m', FALSE); /* XXX ? */
3124 const char *use = "use ";
3126 /* -M-foo == 'no foo' */
3127 /* Leading space on " no " is deliberate, to make both
3128 possibilities the same length. */
3129 if (*s == '-') { use = " no "; ++s; }
3130 sv = newSVpvn(use,4);
3132 /* We allow -M'Module qw(Foo Bar)' */
3133 while(isALNUM(*s) || *s==':') {
3142 Perl_croak(aTHX_ "Module name required with -%c option",
3145 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3146 "contains single ':'",
3147 (int)(s - start), start, option);
3148 end = s + strlen(s);
3150 sv_catpvn(sv, start, end - start);
3151 if (option == 'm') {
3153 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3154 sv_catpvs( sv, " ()");
3157 sv_catpvn(sv, start, s-start);
3158 /* Use NUL as q''-delimiter. */
3159 sv_catpvs(sv, " split(/,/,q\0");
3161 sv_catpvn(sv, s, end - s);
3162 sv_catpvs(sv, "\0)");
3165 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3168 Perl_croak(aTHX_ "Missing argument to -%c", option);
3179 forbid_setid('s', FALSE);
3180 PL_doswitches = TRUE;
3194 PL_do_undump = TRUE;
3202 if (!sv_derived_from(PL_patchlevel, "version"))
3203 upg_version(PL_patchlevel, TRUE);
3206 SV* level= vstringify(PL_patchlevel);
3207 #ifdef PERL_PATCHNUM
3208 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3209 SV *num = newSVpvs(PERL_PATCHNUM "*");
3211 SV *num = newSVpvs(PERL_PATCHNUM);
3214 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3215 SvREFCNT_dec(level);
3218 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3222 PerlIO_printf(PerlIO_stdout(),
3223 "\nThis is perl " STRINGIFY(PERL_REVISION)
3224 ", version " STRINGIFY(PERL_VERSION)
3225 ", subversion " STRINGIFY(PERL_SUBVERSION)
3226 " (%"SVf") built for " ARCHNAME, level
3228 SvREFCNT_dec(level);
3231 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3232 PerlIO_printf(PerlIO_stdout(),
3233 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3234 SVfARG(vstringify(PL_patchlevel))));
3235 PerlIO_printf(PerlIO_stdout(),
3236 Perl_form(aTHX_ " built under %s at %s %s\n",
3237 OSNAME, __DATE__, __TIME__));
3238 PerlIO_printf(PerlIO_stdout(),
3239 Perl_form(aTHX_ " OS Specific Release: %s\n",
3242 #if defined(LOCAL_PATCH_COUNT)
3243 if (LOCAL_PATCH_COUNT > 0)
3244 PerlIO_printf(PerlIO_stdout(),
3245 "\n(with %d registered patch%s, "
3246 "see perl -V for more detail)",
3248 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\n\nCopyright 1987-2009, Larry Wall\n");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3260 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3265 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "atariST series port, ++jrb bammi@cadence.com\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "EPOC port by Olaf Flebbe, 1999-2002\n");
3300 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3301 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3304 #ifdef __SYMBIAN32__
3305 PerlIO_printf(PerlIO_stdout(),
3306 "Symbian port by Nokia, 2004-2005\n");
3308 #ifdef BINARY_BUILD_NOTICE
3309 BINARY_BUILD_NOTICE;
3311 PerlIO_printf(PerlIO_stdout(),
3313 Perl may be copied only under the terms of either the Artistic License or the\n\
3314 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3315 Complete documentation for Perl, including FAQ lists, should be found on\n\
3316 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3317 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3320 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3321 PL_dowarn |= G_WARN_ON;
3326 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3327 if (!specialWARN(PL_compiling.cop_warnings))
3328 PerlMemShared_free(PL_compiling.cop_warnings);
3329 PL_compiling.cop_warnings = pWARN_ALL ;
3333 PL_dowarn = G_WARN_ALL_OFF;
3334 if (!specialWARN(PL_compiling.cop_warnings))
3335 PerlMemShared_free(PL_compiling.cop_warnings);
3336 PL_compiling.cop_warnings = pWARN_NONE ;
3343 if (s[0] == '-') /* Additional switches on #! line. */
3348 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3354 #ifdef ALTERNATE_SHEBANG
3355 case 'S': /* OS/2 needs -S on "extproc" line. */
3359 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3364 /* compliments of Tom Christiansen */
3366 /* unexec() can be found in the Gnu emacs distribution */
3367 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3370 Perl_my_unexec(pTHX)
3372 PERL_UNUSED_CONTEXT;
3374 SV * prog = newSVpv(BIN_EXP, 0);
3375 SV * file = newSVpv(PL_origfilename, 0);
3379 sv_catpvs(prog, "/perl");
3380 sv_catpvs(file, ".perldump");
3382 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3383 /* unexec prints msg to stderr in case of failure */
3384 PerlProc_exit(status);
3387 # include <lib$routines.h>
3388 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3389 # elif defined(WIN32) || defined(__CYGWIN__)
3390 Perl_croak(aTHX_ "dump is not supported");
3392 ABORT(); /* for use with undump */
3397 /* initialize curinterp */
3403 # define PERLVAR(var,type)
3404 # define PERLVARA(var,n,type)
3405 # if defined(PERL_IMPLICIT_CONTEXT)
3406 # define PERLVARI(var,type,init) aTHX->var = init;
3407 # define PERLVARIC(var,type,init) aTHX->var = init;
3409 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3410 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3412 # include "intrpvar.h"
3418 # define PERLVAR(var,type)
3419 # define PERLVARA(var,n,type)
3420 # define PERLVARI(var,type,init) PL_##var = init;
3421 # define PERLVARIC(var,type,init) PL_##var = init;
3422 # include "intrpvar.h"
3429 /* As these are inside a structure, PERLVARI isn't capable of initialising
3431 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3432 PL_reg_poscache = PL_reg_starttry = NULL;
3436 S_init_main_stash(pTHX)
3441 PL_curstash = PL_defstash = newHV();
3442 /* We know that the string "main" will be in the global shared string
3443 table, so it's a small saving to use it rather than allocate another
3445 PL_curstname = newSVpvs_share("main");
3446 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3447 /* If we hadn't caused another reference to "main" to be in the shared
3448 string table above, then it would be worth reordering these two,
3449 because otherwise all we do is delete "main" from it as a consequence
3450 of the SvREFCNT_dec, only to add it again with hv_name_set */
3451 SvREFCNT_dec(GvHV(gv));
3452 hv_name_set(PL_defstash, "main", 4, 0);
3453 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3455 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3457 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3458 GvMULTI_on(PL_incgv);
3459 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3460 GvMULTI_on(PL_hintgv);
3461 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3462 SvREFCNT_inc_simple_void(PL_defgv);
3463 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3464 SvREFCNT_inc_simple_void(PL_errgv);
3465 GvMULTI_on(PL_errgv);
3466 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3467 GvMULTI_on(PL_replgv);
3468 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3469 #ifdef PERL_DONT_CREATE_GVSV
3472 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3474 PL_curstash = PL_defstash;
3475 CopSTASH_set(&PL_compiling, PL_defstash);
3476 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3477 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3479 /* We must init $/ before switches are processed. */
3480 sv_setpvs(get_sv("/", GV_ADD), "\n");
3484 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3485 bool *suidscript, PerlIO **rsfpp)
3490 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3493 PL_origfilename = savepvs("-e");
3496 /* if find_script() returns, it returns a malloc()-ed value */
3497 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3499 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3500 const char *s = scriptname + 8;
3506 * Tell apart "normal" usage of fdscript, e.g.
3507 * with bash on FreeBSD:
3508 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3509 * from usage in suidperl.
3510 * Does any "normal" usage leave garbage after the number???
3511 * Is it a mistake to use a similar /dev/fd/ construct for
3516 * Be supersafe and do some sanity-checks.
3517 * Still, can we be sure we got the right thing?
3520 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3523 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3525 scriptname = savepv(s + 1);
3526 Safefree(PL_origfilename);
3527 PL_origfilename = (char *)scriptname;
3532 CopFILE_free(PL_curcop);
3533 CopFILE_set(PL_curcop, PL_origfilename);
3534 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3535 scriptname = (char *)"";
3536 if (fdscript >= 0) {
3537 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3538 # if defined(HAS_FCNTL) && defined(F_SETFD)
3540 /* ensure close-on-exec */
3541 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3544 else if (!*scriptname) {
3545 forbid_setid(0, *suidscript);
3546 *rsfpp = PerlIO_stdin();
3549 #ifdef FAKE_BIT_BUCKET
3550 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3551 * is called) and still have the "-e" work. (Believe it or not,
3552 * a /dev/null is required for the "-e" to work because source
3553 * filter magic is used to implement it. ) This is *not* a general
3554 * replacement for a /dev/null. What we do here is create a temp
3555 * file (an empty file), open up that as the script, and then
3556 * immediately close and unlink it. Close enough for jazz. */
3557 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3558 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3559 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3560 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3561 FAKE_BIT_BUCKET_TEMPLATE
3563 const char * const err = "Failed to create a fake bit bucket";
3564 if (strEQ(scriptname, BIT_BUCKET)) {
3565 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3566 int tmpfd = mkstemp(tmpname);
3568 scriptname = tmpname;
3571 Perl_croak(aTHX_ err);
3574 scriptname = mktemp(tmpname);
3576 Perl_croak(aTHX_ err);
3581 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3582 #ifdef FAKE_BIT_BUCKET
3583 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3584 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3585 && strlen(scriptname) == sizeof(tmpname) - 1) {
3588 scriptname = BIT_BUCKET;
3590 # if defined(HAS_FCNTL) && defined(F_SETFD)
3592 /* ensure close-on-exec */
3593 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3597 /* PSz 16 Sep 03 Keep neat error message */
3599 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3601 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3602 CopFILE(PL_curcop), Strerror(errno));
3608 * I_SYSSTATVFS HAS_FSTATVFS
3610 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3611 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3612 * here so that metaconfig picks them up. */
3615 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3616 /* Don't even need this function. */
3619 S_validate_suid(pTHX_ PerlIO *rsfp)
3621 PERL_ARGS_ASSERT_VALIDATE_SUID;
3623 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3626 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3627 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3629 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3632 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3633 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3634 /* not set-id, must be wrapped */
3637 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3640 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3644 register const char *s2;
3646 PERL_ARGS_ASSERT_FIND_BEGINNING;
3648 /* skip forward in input to the real script? */
3650 while (PL_doextract) {
3651 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3652 Perl_croak(aTHX_ "No Perl script found in input\n");
3654 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3655 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3656 PL_doextract = FALSE;
3657 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3659 while (*s == ' ' || *s == '\t') s++;
3661 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3662 || s2[-1] == '_') s2--;
3663 if (strnEQ(s2-4,"perl",4))
3664 while ((s = moreswitches(s)))
3676 PL_uid = PerlProc_getuid();
3677 PL_euid = PerlProc_geteuid();
3678 PL_gid = PerlProc_getgid();
3679 PL_egid = PerlProc_getegid();
3681 PL_uid |= PL_gid << 16;
3682 PL_euid |= PL_egid << 16;
3684 /* Should not happen: */
3685 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3686 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3689 * Should go by suidscript, not uid!=euid: why disallow
3690 * system("ls") in scripts run from setuid things?
3691 * Or, is this run before we check arguments and set suidscript?
3692 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3693 * (We never have suidscript, can we be sure to have fdscript?)
3694 * Or must then go by UID checks? See comments in forbid_setid also.
3698 /* This is used very early in the lifetime of the program,
3699 * before even the options are parsed, so PL_tainting has
3700 * not been initialized properly. */
3702 Perl_doing_taint(int argc, char *argv[], char *envp[])
3704 #ifndef PERL_IMPLICIT_SYS
3705 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3706 * before we have an interpreter-- and the whole point of this
3707 * function is to be called at such an early stage. If you are on
3708 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3709 * "tainted because running with altered effective ids', you'll
3710 * have to add your own checks somewhere in here. The two most
3711 * known samples of 'implicitness' are Win32 and NetWare, neither
3712 * of which has much of concept of 'uids'. */
3713 int uid = PerlProc_getuid();
3714 int euid = PerlProc_geteuid();
3715 int gid = PerlProc_getgid();
3716 int egid = PerlProc_getegid();
3723 if (uid && (euid != uid || egid != gid))
3725 #endif /* !PERL_IMPLICIT_SYS */
3726 /* This is a really primitive check; environment gets ignored only
3727 * if -T are the first chars together; otherwise one gets
3728 * "Too late" message. */
3729 if ( argc > 1 && argv[1][0] == '-'
3730 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3735 /* Passing the flag as a single char rather than a string is a slight space
3736 optimisation. The only message that isn't /^-.$/ is
3737 "program input from stdin", which is substituted in place of '\0', which
3738 could never be a command line flag. */
3740 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3743 char string[3] = "-x";
3744 const char *message = "program input from stdin";
3751 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3752 if (PL_euid != PL_uid)
3753 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3754 if (PL_egid != PL_gid)
3755 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3756 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3758 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3762 Perl_init_debugger(pTHX)
3765 HV * const ostash = PL_curstash;
3767 PL_curstash = PL_debstash;
3768 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3770 AvREAL_off(PL_dbargs);
3771 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3772 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3773 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3774 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3775 sv_setiv(PL_DBsingle, 0);
3776 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3777 sv_setiv(PL_DBtrace, 0);
3778 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3779 sv_setiv(PL_DBsignal, 0);
3780 PL_curstash = ostash;
3783 #ifndef STRESS_REALLOC
3784 #define REASONABLE(size) (size)
3786 #define REASONABLE(size) (1) /* unreasonable */
3790 Perl_init_stacks(pTHX)
3793 /* start with 128-item stack and 8K cxstack */
3794 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3795 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3796 PL_curstackinfo->si_type = PERLSI_MAIN;
3797 PL_curstack = PL_curstackinfo->si_stack;
3798 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3800 PL_stack_base = AvARRAY(PL_curstack);
3801 PL_stack_sp = PL_stack_base;
3802 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3804 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3807 PL_tmps_max = REASONABLE(128);
3809 Newx(PL_markstack,REASONABLE(32),I32);
3810 PL_markstack_ptr = PL_markstack;
3811 PL_markstack_max = PL_markstack + REASONABLE(32);
3815 Newx(PL_scopestack,REASONABLE(32),I32);
3817 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3819 PL_scopestack_ix = 0;
3820 PL_scopestack_max = REASONABLE(32);
3822 Newx(PL_savestack,REASONABLE(128),ANY);
3823 PL_savestack_ix = 0;
3824 PL_savestack_max = REASONABLE(128);
3833 while (PL_curstackinfo->si_next)
3834 PL_curstackinfo = PL_curstackinfo->si_next;
3835 while (PL_curstackinfo) {
3836 PERL_SI *p = PL_curstackinfo->si_prev;
3837 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3838 Safefree(PL_curstackinfo->si_cxstack);
3839 Safefree(PL_curstackinfo);
3840 PL_curstackinfo = p;
3842 Safefree(PL_tmps_stack);
3843 Safefree(PL_markstack);
3844 Safefree(PL_scopestack);
3846 Safefree(PL_scopestack_name);
3848 Safefree(PL_savestack);
3853 S_init_predump_symbols(pTHX)
3859 sv_setpvs(get_sv("\"", GV_ADD), " ");
3860 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3862 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3863 GvMULTI_on(PL_stdingv);
3864 io = GvIOp(PL_stdingv);
3865 IoTYPE(io) = IoTYPE_RDONLY;
3866 IoIFP(io) = PerlIO_stdin();
3867 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3869 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3871 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3874 IoTYPE(io) = IoTYPE_WRONLY;
3875 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3877 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3879 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3881 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3882 GvMULTI_on(PL_stderrgv);
3883 io = GvIOp(PL_stderrgv);
3884 IoTYPE(io) = IoTYPE_WRONLY;
3885 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3886 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3888 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3890 PL_statname = newSV(0); /* last filename we did stat on */
3894 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3898 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3900 argc--,argv++; /* skip name of script */
3901 if (PL_doswitches) {
3902 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3906 if (argv[0][1] == '-' && !argv[0][2]) {
3910 if ((s = strchr(argv[0], '='))) {
3911 const char *const start_name = argv[0] + 1;
3912 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3913 TRUE, SVt_PV)), s + 1);
3916 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3919 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3920 GvMULTI_on(PL_argvgv);
3921 (void)gv_AVadd(PL_argvgv);
3922 av_clear(GvAVn(PL_argvgv));
3923 for (; argc > 0; argc--,argv++) {
3924 SV * const sv = newSVpv(argv[0],0);
3925 av_push(GvAVn(PL_argvgv),sv);
3926 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3927 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3930 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3931 (void)sv_utf8_decode(sv);
3937 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3942 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3944 PL_toptarget = newSV_type(SVt_PVFM);
3945 sv_setpvs(PL_toptarget, "");
3946 PL_bodytarget = newSV_type(SVt_PVFM);
3947 sv_setpvs(PL_bodytarget, "");
3948 PL_formtarget = PL_bodytarget;
3952 init_argv_symbols(argc,argv);
3954 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3955 sv_setpv(GvSV(tmpgv),PL_origfilename);
3957 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3959 bool env_is_not_environ;
3960 GvMULTI_on(PL_envgv);
3961 hv = GvHVn(PL_envgv);
3962 hv_magic(hv, NULL, PERL_MAGIC_env);
3964 #ifdef USE_ENVIRON_ARRAY
3965 /* Note that if the supplied env parameter is actually a copy
3966 of the global environ then it may now point to free'd memory
3967 if the environment has been modified since. To avoid this
3968 problem we treat env==NULL as meaning 'use the default'
3972 env_is_not_environ = env != environ;
3973 if (env_is_not_environ
3974 # ifdef USE_ITHREADS
3975 && PL_curinterp == aTHX
3984 for (; *env; env++) {
3987 if (!(s = strchr(old_var,'=')) || s == old_var)
3990 #if defined(MSDOS) && !defined(DJGPP)
3992 (void)strupr(old_var);
3995 sv = newSVpv(s+1, 0);
3996 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3997 if (env_is_not_environ)
4001 #endif /* USE_ENVIRON_ARRAY */
4002 #endif /* !PERL_MICRO */
4005 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4006 SvREADONLY_off(GvSV(tmpgv));
4007 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4008 SvREADONLY_on(GvSV(tmpgv));
4010 #ifdef THREADS_HAVE_PIDS
4011 PL_ppid = (IV)getppid();
4014 /* touch @F array to prevent spurious warnings 20020415 MJD */
4016 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4021 S_init_perllib(pTHX)
4025 const char *perl5lib = NULL;
4028 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4034 perl5lib = PerlEnv_getenv("PERL5LIB");
4036 * It isn't possible to delete an environment variable with
4037 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4038 * case we treat PERL5LIB as undefined if it has a zero-length value.
4040 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4041 if (perl5lib && *perl5lib != '\0')
4045 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4047 s = PerlEnv_getenv("PERLLIB");
4049 incpush_use_sep(s, 0, 0);
4052 /* Treat PERL5?LIB as a possible search list logical name -- the
4053 * "natural" VMS idiom for a Unix path string. We allow each
4054 * element to be a set of |-separated directories for compatibility.
4058 if (my_trnlnm("PERL5LIB",buf,0))
4060 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4061 } while (my_trnlnm("PERL5LIB",buf,++idx));
4063 while (my_trnlnm("PERLLIB",buf,idx++))
4064 incpush_use_sep(buf, 0, 0);
4069 #ifndef PERL_IS_MINIPERL
4070 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4071 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4073 /* Use the ~-expanded versions of APPLLIB (undocumented),
4074 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4077 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4078 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4082 /* sitearch is always relative to sitelib on Windows for
4083 * DLL-based path intuition to work correctly */
4084 # if !defined(WIN32)
4085 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4086 INCPUSH_CAN_RELOCATE);
4092 /* this picks up sitearch as well */
4093 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4095 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4097 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4101 #ifdef PERL_VENDORARCH_EXP
4102 /* vendorarch is always relative to vendorlib on Windows for
4103 * DLL-based path intuition to work correctly */
4104 # if !defined(WIN32)
4105 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4106 INCPUSH_CAN_RELOCATE);
4110 #ifdef PERL_VENDORLIB_EXP
4112 /* this picks up vendorarch as well */
4113 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4115 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4117 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4118 INCPUSH_CAN_RELOCATE);
4123 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4127 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4131 s = win32_get_privlib(PERL_FS_VERSION, &len);
4133 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4136 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4138 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4142 #ifdef PERL_OTHERLIBDIRS
4143 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4144 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4145 |INCPUSH_CAN_RELOCATE);
4151 * It isn't possible to delete an environment variable with
4152 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4153 * case we treat PERL5LIB as undefined if it has a zero-length value.
4155 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4156 if (perl5lib && *perl5lib != '\0')
4160 incpush_use_sep(perl5lib, 0,
4161 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4163 /* Treat PERL5?LIB as a possible search list logical name -- the
4164 * "natural" VMS idiom for a Unix path string. We allow each
4165 * element to be a set of |-separated directories for compatibility.
4169 if (my_trnlnm("PERL5LIB",buf,0))
4171 incpush_use_sep(buf, 0,
4172 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4173 } while (my_trnlnm("PERL5LIB",buf,++idx));
4177 /* Use the ~-expanded versions of APPLLIB (undocumented),
4178 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4181 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4182 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4185 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4186 /* Search for version-specific dirs below here */
4187 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4188 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4192 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4193 /* Search for version-specific dirs below here */
4194 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4195 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4198 #ifdef PERL_OTHERLIBDIRS
4199 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4200 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4201 |INCPUSH_CAN_RELOCATE);
4203 #endif /* !PERL_IS_MINIPERL */
4206 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4209 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4210 # define PERLLIB_SEP ';'
4213 # define PERLLIB_SEP '|'
4215 # define PERLLIB_SEP ':'
4218 #ifndef PERLLIB_MANGLE
4219 # define PERLLIB_MANGLE(s,n) (s)
4222 /* Push a directory onto @INC if it exists.
4223 Generate a new SV if we do this, to save needing to copy the SV we push
4226 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4231 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4233 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4234 S_ISDIR(tmpstatbuf.st_mode)) {
4236 dir = newSVsv(stem);
4238 /* Truncate dir back to stem. */
4239 SvCUR_set(dir, SvCUR(stem));
4245 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4248 const U8 using_sub_dirs
4249 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4250 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4251 const U8 add_versioned_sub_dirs
4252 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4253 const U8 add_archonly_sub_dirs
4254 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4255 #ifdef PERL_INC_VERSION_LIST
4256 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4258 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4259 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4260 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4261 AV *const inc = GvAVn(PL_incgv);
4263 PERL_ARGS_ASSERT_INCPUSH;
4266 /* Could remove this vestigial extra block, if we don't mind a lot of
4267 re-indenting diff noise. */
4270 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4271 arranged to unshift #! line -I onto the front of @INC. However,
4272 -I can add version and architecture specific libraries, and they
4273 need to go first. The old code assumed that it was always
4274 pushing. Hence to make it work, need to push the architecture
4275 (etc) libraries onto a temporary array, then "unshift" that onto
4276 the front of @INC. */
4277 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4280 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4281 defined to so something (in os2/os2.c), but the code has been
4282 this way, ignoring any possible changed of length, since
4283 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4285 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4287 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4290 /* Do the if() outside the #ifdef to avoid warnings about an unused
4293 #ifdef PERL_RELOCATABLE_INC
4295 * Relocatable include entries are marked with a leading .../
4298 * 0: Remove that leading ".../"
4299 * 1: Remove trailing executable name (anything after the last '/')
4300 * from the perl path to give a perl prefix
4302 * While the @INC element starts "../" and the prefix ends with a real
4303 * directory (ie not . or ..) chop that real directory off the prefix
4304 * and the leading "../" from the @INC element. ie a logical "../"
4306 * Finally concatenate the prefix and the remainder of the @INC element
4307 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4308 * generates /usr/local/lib/perl5
4310 const char *libpath = SvPVX(libdir);
4311 STRLEN libpath_len = SvCUR(libdir);
4312 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4314 SV * const caret_X = get_sv("\030", 0);
4315 /* Going to use the SV just as a scratch buffer holding a C
4321 /* $^X is *the* source of taint if tainting is on, hence
4322 SvPOK() won't be true. */
4324 assert(SvPOKp(caret_X));
4325 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4327 /* Firstly take off the leading .../
4328 If all else fail we'll do the paths relative to the current
4330 sv_chop(libdir, libpath + 4);
4331 /* Don't use SvPV as we're intentionally bypassing taining,
4332 mortal copies that the mg_get of tainting creates, and
4333 corruption that seems to come via the save stack.
4334 I guess that the save stack isn't correctly set up yet. */
4335 libpath = SvPVX(libdir);
4336 libpath_len = SvCUR(libdir);
4338 /* This would work more efficiently with memrchr, but as it's
4339 only a GNU extension we'd need to probe for it and
4340 implement our own. Not hard, but maybe not worth it? */
4342 prefix = SvPVX(prefix_sv);
4343 lastslash = strrchr(prefix, '/');
4345 /* First time in with the *lastslash = '\0' we just wipe off
4346 the trailing /perl from (say) /usr/foo/bin/perl
4350 while ((*lastslash = '\0'), /* Do that, come what may. */
4351 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4352 && (lastslash = strrchr(prefix, '/')))) {
4353 if (lastslash[1] == '\0'
4354 || (lastslash[1] == '.'
4355 && (lastslash[2] == '/' /* ends "/." */
4356 || (lastslash[2] == '/'
4357 && lastslash[3] == '/' /* or "/.." */
4359 /* Prefix ends "/" or "/." or "/..", any of which
4360 are fishy, so don't do any more logical cleanup.
4364 /* Remove leading "../" from path */
4367 /* Next iteration round the loop removes the last
4368 directory name from prefix by writing a '\0' in
4369 the while clause. */
4371 /* prefix has been terminated with a '\0' to the correct
4372 length. libpath points somewhere into the libdir SV.
4373 We need to join the 2 with '/' and drop the result into
4375 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4376 SvREFCNT_dec(libdir);
4377 /* And this is the new libdir. */
4380 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4381 /* Need to taint reloccated paths if running set ID */
4382 SvTAINTED_on(libdir);
4385 SvREFCNT_dec(prefix_sv);
4390 * BEFORE pushing libdir onto @INC we may first push version- and
4391 * archname-specific sub-directories.
4393 if (using_sub_dirs) {
4395 #ifdef PERL_INC_VERSION_LIST
4396 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4397 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4398 const char * const *incver;
4405 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4407 while (unix[len-1] == '/') len--; /* Cosmetic */
4408 sv_usepvn(libdir,unix,len);
4411 PerlIO_printf(Perl_error_log,
4412 "Failed to unixify @INC element \"%s\"\n",
4416 subdir = newSVsv(libdir);
4418 if (add_versioned_sub_dirs) {
4419 /* .../version/archname if -d .../version/archname */
4420 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4421 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4423 /* .../version if -d .../version */
4424 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4425 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4428 #ifdef PERL_INC_VERSION_LIST
4430 for (incver = incverlist; *incver; incver++) {
4431 /* .../xxx if -d .../xxx */
4432 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4433 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4438 if (add_archonly_sub_dirs) {
4439 /* .../archname if -d .../archname */
4440 sv_catpvs(subdir, "/" ARCHNAME);
4441 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4445 assert (SvREFCNT(subdir) == 1);
4446 SvREFCNT_dec(subdir);
4449 /* finally add this lib directory at the end of @INC */
4451 U32 extra = av_len(av) + 1;
4452 av_unshift(inc, extra + push_basedir);
4454 av_store(inc, extra, libdir);
4456 /* av owns a reference, av_store() expects to be donated a
4457 reference, and av expects to be sane when it's cleared.
4458 If I wanted to be naughty and wrong, I could peek inside the
4459 implementation of av_clear(), realise that it uses
4460 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4461 and so directly steal from it (with a memcpy() to inc, and
4462 then memset() to NULL them out. But people copy code from the
4463 core expecting it to be best practise, so let's use the API.
4464 Although studious readers will note that I'm not checking any
4466 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4470 else if (push_basedir) {
4471 av_push(inc, libdir);
4474 if (!push_basedir) {
4475 assert (SvREFCNT(libdir) == 1);
4476 SvREFCNT_dec(libdir);
4482 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4486 /* This logic has been broken out from S_incpush(). It may be possible to
4489 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4496 /* Break at all separators */
4497 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4499 /* skip any consecutive separators */
4501 /* Uncomment the next line for PATH semantics */
4502 /* But you'll need to write tests */
4503 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4505 incpush(p, (STRLEN)(s - p), flags);
4510 incpush(p, (STRLEN)(end - p), flags);
4515 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4519 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4525 PERL_ARGS_ASSERT_CALL_LIST;
4527 while (av_len(paramList) >= 0) {
4528 cv = MUTABLE_CV(av_shift(paramList));
4530 if (paramList == PL_beginav) {
4531 /* save PL_beginav for compiler */
4532 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4534 else if (paramList == PL_checkav) {
4535 /* save PL_checkav for compiler */
4536 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4538 else if (paramList == PL_unitcheckav) {
4539 /* save PL_unitcheckav for compiler */
4540 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4551 PL_madskills |= 16384;
4556 PL_madskills &= ~16384;
4559 (void)SvPV_const(atsv, len);
4561 PL_curcop = &PL_compiling;
4562 CopLINE_set(PL_curcop, oldline);
4563 if (paramList == PL_beginav)
4564 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4566 Perl_sv_catpvf(aTHX_ atsv,
4567 "%s failed--call queue aborted",
4568 paramList == PL_checkav ? "CHECK"
4569 : paramList == PL_initav ? "INIT"
4570 : paramList == PL_unitcheckav ? "UNITCHECK"
4572 while (PL_scopestack_ix > oldscope)
4575 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4582 /* my_exit() was called */
4583 while (PL_scopestack_ix > oldscope)
4586 PL_curstash = PL_defstash;
4587 PL_curcop = &PL_compiling;
4588 CopLINE_set(PL_curcop, oldline);
4594 PL_curcop = &PL_compiling;
4595 CopLINE_set(PL_curcop, oldline);
4598 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4607 Perl_my_exit(pTHX_ U32 status)
4618 STATUS_EXIT_SET(status);
4625 Perl_my_failure_exit(pTHX)
4629 /* We have been called to fall on our sword. The desired exit code
4630 * should be already set in STATUS_UNIX, but could be shifted over
4631 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4634 * If an error code has not been set, then force the issue.
4636 if (MY_POSIX_EXIT) {
4638 /* According to the die_exit.t tests, if errno is non-zero */
4639 /* It should be used for the error status. */
4641 if (errno == EVMSERR) {
4642 STATUS_NATIVE = vaxc$errno;
4645 /* According to die_exit.t tests, if the child_exit code is */
4646 /* also zero, then we need to exit with a code of 255 */
4647 if ((errno != 0) && (errno < 256))
4648 STATUS_UNIX_EXIT_SET(errno);
4649 else if (STATUS_UNIX < 255) {
4650 STATUS_UNIX_EXIT_SET(255);
4655 /* The exit code could have been set by $? or vmsish which
4656 * means that it may not have fatal set. So convert
4657 * success/warning codes to fatal with out changing
4658 * the POSIX status code. The severity makes VMS native
4659 * status handling work, while UNIX mode programs use the
4660 * the POSIX exit codes.
4662 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4663 STATUS_NATIVE &= STS$M_COND_ID;
4664 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4668 /* Traditionally Perl on VMS always expects a Fatal Error. */
4669 if (vaxc$errno & 1) {
4671 /* So force success status to failure */
4672 if (STATUS_NATIVE & 1)
4677 STATUS_UNIX = EINTR; /* In case something cares */
4682 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4684 /* Encode the severity code */
4685 severity = STATUS_NATIVE & STS$M_SEVERITY;
4686 STATUS_UNIX = (severity ? severity : 1) << 8;
4688 /* Perl expects this to be a fatal error */
4689 if (severity != STS$K_SEVERE)
4698 STATUS_UNIX_SET(errno);
4700 exitstatus = STATUS_UNIX >> 8;
4701 if (exitstatus & 255)
4702 STATUS_UNIX_SET(exitstatus);
4704 STATUS_UNIX_SET(255);
4711 S_my_exit_jump(pTHX)
4716 SvREFCNT_dec(PL_e_script);
4720 POPSTACK_TO(PL_mainstack);
4728 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4731 const char * const p = SvPVX_const(PL_e_script);
4732 const char *nl = strchr(p, '\n');
4734 PERL_UNUSED_ARG(idx);
4735 PERL_UNUSED_ARG(maxlen);
4737 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4739 filter_del(read_e_script);
4742 sv_catpvn(buf_sv, p, nl-p);
4743 sv_chop(PL_e_script, nl);
4749 * c-indentation-style: bsd
4751 * indent-tabs-mode: t
4754 * ex: set ts=8 sts=4 sw=4 noet: