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; serial %"UVuf"\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)" : "",
1176 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1177 Perl_dump_sv_child(aTHX_ sv);
1183 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1187 /* Wait for up to 4 seconds for child to terminate.
1188 This seems to be the least effort way of timing out on reaping
1190 struct timeval waitfor = {4, 0};
1191 int sock = PL_dumper_fd;
1195 FD_SET(sock, &rset);
1196 select(sock + 1, &rset, NULL, NULL, &waitfor);
1197 waitpid(child, &status, WNOHANG);
1202 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1208 #ifdef PERL_DEBUG_READONLY_OPS
1214 #if defined(PERLIO_LAYERS)
1215 /* No more IO - including error messages ! */
1216 PerlIO_cleanup(aTHX);
1219 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1220 as currently layers use it rather than NULL as a marker
1221 for no arg - and will try and SvREFCNT_dec it.
1223 SvREFCNT(&PL_sv_undef) = 0;
1224 SvREADONLY_off(&PL_sv_undef);
1226 Safefree(PL_origfilename);
1227 PL_origfilename = NULL;
1228 Safefree(PL_reg_start_tmp);
1229 PL_reg_start_tmp = (char**)NULL;
1230 PL_reg_start_tmpl = 0;
1231 Safefree(PL_reg_curpm);
1232 Safefree(PL_reg_poscache);
1233 free_tied_hv_pool();
1234 Safefree(PL_op_mask);
1235 Safefree(PL_psig_name);
1236 PL_psig_name = (SV**)NULL;
1237 PL_psig_ptr = (SV**)NULL;
1238 Safefree(PL_psig_pend);
1239 PL_psig_pend = (int*)NULL;
1241 /* We need to NULL PL_psig_pend first, so that
1242 signal handlers know not to use it */
1243 int *psig_save = PL_psig_pend;
1244 PL_psig_pend = (int*)NULL;
1245 Safefree(psig_save);
1249 PL_tainting = FALSE;
1250 PL_taint_warn = FALSE;
1251 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1254 DEBUG_P(debprofdump());
1256 #ifdef USE_REENTRANT_API
1257 Perl_reentrant_free(aTHX);
1262 while (PL_regmatch_slab) {
1263 regmatch_slab *s = PL_regmatch_slab;
1264 PL_regmatch_slab = PL_regmatch_slab->next;
1268 /* As the absolutely last thing, free the non-arena SV for mess() */
1271 /* we know that type == SVt_PVMG */
1273 /* it could have accumulated taint magic */
1276 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1277 moremagic = mg->mg_moremagic;
1278 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1280 Safefree(mg->mg_ptr);
1284 /* we know that type >= SVt_PV */
1285 SvPV_free(PL_mess_sv);
1286 Safefree(SvANY(PL_mess_sv));
1287 Safefree(PL_mess_sv);
1294 =for apidoc perl_free
1296 Releases a Perl interpreter. See L<perlembed>.
1306 PERL_ARGS_ASSERT_PERL_FREE;
1308 if (PL_veto_cleanup)
1311 #ifdef PERL_TRACK_MEMPOOL
1314 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1315 * value as we're probably hunting memory leaks then
1317 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1318 if (!s || atoi(s) == 0) {
1319 const U32 old_debug = PL_debug;
1320 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1321 thread at thread exit. */
1323 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1324 "free this thread's memory\n");
1325 PL_debug &= ~ DEBUG_m_FLAG;
1327 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1328 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1329 PL_debug = old_debug;
1334 #if defined(WIN32) || defined(NETWARE)
1335 # if defined(PERL_IMPLICIT_SYS)
1338 void *host = nw_internal_host;
1340 void *host = w32_internal_host;
1342 PerlMem_free(aTHXx);
1344 nw_delete_internal_host(host);
1346 win32_delete_internal_host(host);
1350 PerlMem_free(aTHXx);
1353 PerlMem_free(aTHXx);
1357 #if defined(USE_ITHREADS)
1358 /* provide destructors to clean up the thread key when libperl is unloaded */
1359 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1361 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1362 #pragma fini "perl_fini"
1363 #elif defined(__sun) && !defined(__GNUC__)
1364 #pragma fini (perl_fini)
1368 #if defined(__GNUC__)
1369 __attribute__((destructor))
1374 if (PL_curinterp && !PL_veto_cleanup)
1379 #endif /* THREADS */
1382 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1385 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1386 PL_exitlist[PL_exitlistlen].fn = fn;
1387 PL_exitlist[PL_exitlistlen].ptr = ptr;
1391 #ifdef HAS_PROCSELFEXE
1392 /* This is a function so that we don't hold on to MAXPATHLEN
1393 bytes of stack longer than necessary
1396 S_procself_val(pTHX_ SV *sv, const char *arg0)
1398 char buf[MAXPATHLEN];
1399 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1401 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1402 includes a spurious NUL which will cause $^X to fail in system
1403 or backticks (this will prevent extensions from being built and
1404 many tests from working). readlink is not meant to add a NUL.
1405 Normal readlink works fine.
1407 if (len > 0 && buf[len-1] == '\0') {
1411 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1412 returning the text "unknown" from the readlink rather than the path
1413 to the executable (or returning an error from the readlink). Any valid
1414 path has a '/' in it somewhere, so use that to validate the result.
1415 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1417 if (len > 0 && memchr(buf, '/', len)) {
1418 sv_setpvn(sv,buf,len);
1424 #endif /* HAS_PROCSELFEXE */
1427 S_set_caret_X(pTHX) {
1429 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1431 #ifdef HAS_PROCSELFEXE
1432 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1435 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1437 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1444 =for apidoc perl_parse
1446 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1452 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1459 PERL_ARGS_ASSERT_PERL_PARSE;
1460 #ifndef MULTIPLICITY
1461 PERL_UNUSED_ARG(my_perl);
1464 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1465 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1466 * This MUST be done before any hash stores or fetches take place.
1467 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1468 * yourself, it is your responsibility to provide a good random seed!
1469 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1470 if (!PL_rehash_seed_set)
1471 PL_rehash_seed = get_hash_seed();
1473 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1475 if (s && (atoi(s) == 1))
1476 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1478 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1483 if (PL_origalen != 0) {
1484 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1487 /* Set PL_origalen be the sum of the contiguous argv[]
1488 * elements plus the size of the env in case that it is
1489 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1490 * as the maximum modifiable length of $0. In the worst case
1491 * the area we are able to modify is limited to the size of
1492 * the original argv[0]. (See below for 'contiguous', though.)
1494 const char *s = NULL;
1497 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1498 /* Do the mask check only if the args seem like aligned. */
1500 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1502 /* See if all the arguments are contiguous in memory. Note
1503 * that 'contiguous' is a loose term because some platforms
1504 * align the argv[] and the envp[]. If the arguments look
1505 * like non-aligned, assume that they are 'strictly' or
1506 * 'traditionally' contiguous. If the arguments look like
1507 * aligned, we just check that they are within aligned
1508 * PTRSIZE bytes. As long as no system has something bizarre
1509 * like the argv[] interleaved with some other data, we are
1510 * fine. (Did I just evoke Murphy's Law?) --jhi */
1511 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1513 for (i = 1; i < PL_origargc; i++) {
1514 if ((PL_origargv[i] == s + 1
1516 || PL_origargv[i] == s + 2
1521 (PL_origargv[i] > s &&
1523 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1534 #ifndef PERL_USE_SAFE_PUTENV
1535 /* Can we grab env area too to be used as the area for $0? */
1536 if (s && PL_origenviron && !PL_use_safe_putenv) {
1537 if ((PL_origenviron[0] == s + 1)
1540 (PL_origenviron[0] > s &&
1541 PL_origenviron[0] <=
1542 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1545 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1546 s = PL_origenviron[0];
1549 my_setenv("NoNe SuCh", NULL);
1550 /* Force copy of environment. */
1551 for (i = 1; PL_origenviron[i]; i++) {
1552 if (PL_origenviron[i] == s + 1
1555 (PL_origenviron[i] > s &&
1556 PL_origenviron[i] <=
1557 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1560 s = PL_origenviron[i];
1568 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1570 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1575 /* Come here if running an undumped a.out. */
1577 PL_origfilename = savepv(argv[0]);
1578 PL_do_undump = FALSE;
1579 cxstack_ix = -1; /* start label stack again */
1581 assert (!PL_tainted);
1583 S_set_caret_X(aTHX);
1585 init_postdump_symbols(argc,argv,env);
1590 op_free(PL_main_root);
1591 PL_main_root = NULL;
1593 PL_main_start = NULL;
1594 SvREFCNT_dec(PL_main_cv);
1598 oldscope = PL_scopestack_ix;
1599 PL_dowarn = G_WARN_OFF;
1604 parse_body(env,xsinit);
1606 call_list(oldscope, PL_unitcheckav);
1608 call_list(oldscope, PL_checkav);
1615 /* my_exit() was called */
1616 while (PL_scopestack_ix > oldscope)
1619 PL_curstash = PL_defstash;
1621 call_list(oldscope, PL_unitcheckav);
1623 call_list(oldscope, PL_checkav);
1627 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1635 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1636 miniperl, and we need to see those flags reflected in the values here. */
1638 /* What this returns is subject to change. Use the public interface in Config.
1641 S_Internals_V(pTHX_ CV *cv)
1644 #ifdef LOCAL_PATCH_COUNT
1645 const int local_patch_count = LOCAL_PATCH_COUNT;
1647 const int local_patch_count = 0;
1649 const int entries = 3 + local_patch_count;
1651 static char non_bincompat_options[] =
1658 # ifdef PERL_DISABLE_PMC
1661 # ifdef PERL_DONT_CREATE_GVSV
1662 " PERL_DONT_CREATE_GVSV"
1664 # ifdef PERL_IS_MINIPERL
1667 # ifdef PERL_MALLOC_WRAP
1670 # ifdef PERL_MEM_LOG
1673 # ifdef PERL_MEM_LOG_NOIMPL
1674 " PERL_MEM_LOG_NOIMPL"
1676 # ifdef PERL_USE_DEVEL
1679 # ifdef PERL_USE_SAFE_PUTENV
1680 " PERL_USE_SAFE_PUTENV"
1682 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1683 " USE_ATTRIBUTES_FOR_PERLIO"
1685 # ifdef USE_FAST_STDIO
1688 # ifdef USE_SITECUSTOMIZE
1689 " USE_SITECUSTOMIZE"
1692 PERL_UNUSED_ARG(cv);
1693 PERL_UNUSED_ARG(items);
1695 EXTEND(SP, entries);
1697 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1698 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1699 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1703 PUSHs(Perl_newSVpvn_flags(aTHX_
1704 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1707 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1711 PUSHs(&PL_sv_undef);
1714 for (i = 1; i <= local_patch_count; i++) {
1715 /* This will be an undef, if PL_localpatches[i] is NULL. */
1716 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1722 #define INCPUSH_UNSHIFT 0x01
1723 #define INCPUSH_ADD_OLD_VERS 0x02
1724 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1725 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1726 #define INCPUSH_NOT_BASEDIR 0x10
1727 #define INCPUSH_CAN_RELOCATE 0x20
1728 #define INCPUSH_ADD_SUB_DIRS \
1729 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1732 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1736 int argc = PL_origargc;
1737 char **argv = PL_origargv;
1738 const char *scriptname = NULL;
1739 VOL bool dosearch = FALSE;
1741 const char *cddir = NULL;
1742 #ifdef USE_SITECUSTOMIZE
1743 bool minus_f = FALSE;
1745 SV *linestr_sv = newSV_type(SVt_PVIV);
1746 bool add_read_e_script = FALSE;
1748 SvGROW(linestr_sv, 80);
1749 sv_setpvs(linestr_sv,"");
1755 for (argc--,argv++; argc > 0; argc--,argv++) {
1756 if (argv[0][0] != '-' || !argv[0][1])
1762 #ifndef PERL_STRICT_CR
1786 if ((s = moreswitches(s)))
1791 CHECK_MALLOC_TOO_LATE_FOR('t');
1792 if( !PL_tainting ) {
1793 PL_taint_warn = TRUE;
1799 CHECK_MALLOC_TOO_LATE_FOR('T');
1801 PL_taint_warn = FALSE;
1809 forbid_setid('e', FALSE);
1811 PL_e_script = newSVpvs("");
1812 add_read_e_script = TRUE;
1815 sv_catpv(PL_e_script, s);
1817 sv_catpv(PL_e_script, argv[1]);
1821 Perl_croak(aTHX_ "No code specified for -%c", c);
1822 sv_catpvs(PL_e_script, "\n");
1826 #ifdef USE_SITECUSTOMIZE
1832 case 'I': /* -I handled both here and in moreswitches() */
1833 forbid_setid('I', FALSE);
1834 if (!*++s && (s=argv[1]) != NULL) {
1838 STRLEN len = strlen(s);
1839 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1842 Perl_croak(aTHX_ "No directory specified for -I");
1845 forbid_setid('S', FALSE);
1854 opts_prog = newSVpvs("use Config; Config::_V()");
1858 opts_prog = Perl_newSVpvf(aTHX_
1859 "use Config; Config::config_vars(qw%c%s%c)",
1863 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1864 /* don't look for script or read stdin */
1865 scriptname = BIT_BUCKET;
1869 PL_doextract = TRUE;
1877 if (!*++s || isSPACE(*s)) {
1881 /* catch use of gnu style long options */
1882 if (strEQ(s, "version")) {
1886 if (strEQ(s, "help")) {
1893 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1904 #ifndef SECURE_INTERNAL_GETENV
1907 (s = PerlEnv_getenv("PERL5OPT")))
1911 if (*s == '-' && *(s+1) == 'T') {
1912 CHECK_MALLOC_TOO_LATE_FOR('T');
1914 PL_taint_warn = FALSE;
1917 char *popt_copy = NULL;
1930 if (!strchr("CDIMUdmtwW", *s))
1931 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1935 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1936 s = popt_copy + (s - d);
1944 if( !PL_tainting ) {
1945 PL_taint_warn = TRUE;
1956 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1958 /* SITELIB_EXP is a function call on Win32.
1959 The games with local $! are to avoid setting errno if there is no
1960 sitecustomize script. */
1961 const char *const sitelib = SITELIB_EXP;
1962 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1964 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1969 scriptname = argv[0];
1972 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1974 else if (scriptname == NULL) {
1976 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1982 /* Set $^X early so that it can be used for relocatable paths in @INC */
1983 assert (!PL_tainted);
1985 S_set_caret_X(aTHX);
1990 bool suidscript = FALSE;
1992 open_script(scriptname, dosearch, &suidscript, &rsfp);
1994 validate_suid(validarg, scriptname, fdscript, suidscript,
1998 # if defined(SIGCHLD) || defined(SIGCLD)
2001 # define SIGCHLD SIGCLD
2003 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2004 if (sigstate == (Sighandler_t) SIG_IGN) {
2005 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2006 "Can't ignore signal CHLD, forcing to default");
2007 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2015 /* This will croak if suidscript is true, as -x cannot be used with
2017 forbid_setid('x', suidscript);
2018 /* Hence you can't get here if suidscript is true */
2020 find_beginning(linestr_sv, rsfp);
2021 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2022 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2026 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2027 CvUNIQUE_on(PL_compcv);
2029 CvPADLIST(PL_compcv) = pad_new(0);
2031 PL_isarev = newHV();
2034 boot_core_UNIVERSAL();
2036 newXS("Internals::V", S_Internals_V, __FILE__);
2039 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2041 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2047 # ifdef HAS_SOCKS5_INIT
2048 socks5_init(argv[0]);
2054 init_predump_symbols();
2055 /* init_postdump_symbols not currently designed to be called */
2056 /* more than once (ENV isn't cleared first, for example) */
2057 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2059 init_postdump_symbols(argc,argv,env);
2061 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2062 * or explicitly in some platforms.
2063 * locale.c:Perl_init_i18nl10n() if the environment
2064 * look like the user wants to use UTF-8. */
2065 #if defined(__SYMBIAN32__)
2066 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2068 # ifndef PERL_IS_MINIPERL
2070 /* Requires init_predump_symbols(). */
2071 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2076 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2077 * and the default open disciplines. */
2078 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2079 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2081 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2082 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2083 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2085 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2086 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2087 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2089 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2090 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2091 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2093 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2094 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2097 sv_setpvs(sv, ":utf8\0:utf8");
2099 sv_setpvs(sv, ":utf8\0");
2102 sv_setpvs(sv, "\0:utf8");
2111 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2112 if (strEQ(s, "unsafe"))
2113 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2114 else if (strEQ(s, "safe"))
2115 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2117 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2124 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2128 PL_xmlfp = PerlIO_stdout();
2130 PL_xmlfp = PerlIO_open(s, "w");
2132 Perl_croak(aTHX_ "Can't open %s", s);
2134 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2140 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2141 PL_madskills = atoi(s);
2142 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2147 lex_start(linestr_sv, rsfp, TRUE);
2148 PL_subname = newSVpvs("main");
2150 if (add_read_e_script)
2151 filter_add(read_e_script, NULL);
2153 /* now parse the script */
2155 SETERRNO(0,SS_NORMAL);
2156 if (yyparse() || PL_parser->error_count) {
2158 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2160 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2164 CopLINE_set(PL_curcop, 0);
2165 PL_curstash = PL_defstash;
2167 SvREFCNT_dec(PL_e_script);
2175 SAVECOPFILE(PL_curcop);
2176 SAVECOPLINE(PL_curcop);
2177 gv_check(PL_defstash);
2186 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2187 dump_mstats("after compilation:");
2197 =for apidoc perl_run
2199 Tells a Perl interpreter to run. See L<perlembed>.
2212 PERL_ARGS_ASSERT_PERL_RUN;
2213 #ifndef MULTIPLICITY
2214 PERL_UNUSED_ARG(my_perl);
2217 oldscope = PL_scopestack_ix;
2225 cxstack_ix = -1; /* start context stack again */
2227 case 0: /* normal completion */
2231 case 2: /* my_exit() */
2232 while (PL_scopestack_ix > oldscope)
2235 PL_curstash = PL_defstash;
2236 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2237 PL_endav && !PL_minus_c)
2238 call_list(oldscope, PL_endav);
2240 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2241 dump_mstats("after execution: ");
2247 POPSTACK_TO(PL_mainstack);
2250 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2261 S_run_body(pTHX_ I32 oldscope)
2264 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2265 PL_sawampersand ? "Enabling" : "Omitting"));
2267 if (!PL_restartop) {
2271 exit(0); /* less likely to core dump than my_exit(0) */
2275 if (DEBUG_x_TEST || DEBUG_B_TEST)
2276 dump_all_perl(!DEBUG_B_TEST);
2278 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2282 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2285 if (PERLDB_SINGLE && PL_DBsingle)
2286 sv_setiv(PL_DBsingle, 1);
2288 call_list(oldscope, PL_initav);
2289 #ifdef PERL_DEBUG_READONLY_OPS
2290 Perl_pending_Slabs_to_ro(aTHX);
2297 PL_op = PL_restartop;
2301 else if (PL_main_start) {
2302 CvDEPTH(PL_main_cv) = 1;
2303 PL_op = PL_main_start;
2311 =head1 SV Manipulation Functions
2313 =for apidoc p||get_sv
2315 Returns the SV of the specified Perl scalar. C<flags> are passed to
2316 C<gv_fetchpv>. If C<GV_ADD> is set and the
2317 Perl variable does not exist then it will be created. If C<flags> is zero
2318 and the variable does not exist then NULL is returned.
2324 Perl_get_sv(pTHX_ const char *name, I32 flags)
2328 PERL_ARGS_ASSERT_GET_SV;
2330 gv = gv_fetchpv(name, flags, SVt_PV);
2337 =head1 Array Manipulation Functions
2339 =for apidoc p||get_av
2341 Returns the AV of the specified Perl array. C<flags> are passed to
2342 C<gv_fetchpv>. If C<GV_ADD> is set and the
2343 Perl variable does not exist then it will be created. If C<flags> is zero
2344 and the variable does not exist then NULL is returned.
2350 Perl_get_av(pTHX_ const char *name, I32 flags)
2352 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2354 PERL_ARGS_ASSERT_GET_AV;
2364 =head1 Hash Manipulation Functions
2366 =for apidoc p||get_hv
2368 Returns the HV of the specified Perl hash. C<flags> are passed to
2369 C<gv_fetchpv>. If C<GV_ADD> is set and the
2370 Perl variable does not exist then it will be created. If C<flags> is zero
2371 and the variable does not exist then NULL is returned.
2377 Perl_get_hv(pTHX_ const char *name, I32 flags)
2379 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2381 PERL_ARGS_ASSERT_GET_HV;
2391 =head1 CV Manipulation Functions
2393 =for apidoc p||get_cvn_flags
2395 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2396 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2397 exist then it will be declared (which has the same effect as saying
2398 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2399 then NULL is returned.
2401 =for apidoc p||get_cv
2403 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2409 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2411 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2412 /* XXX this is probably not what they think they're getting.
2413 * It has the same effect as "sub name;", i.e. just a forward
2416 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2418 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2419 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2420 return newSUB(start_subparse(FALSE, 0),
2421 newSVOP(OP_CONST, 0, sv),
2429 /* Nothing in core calls this now, but we can't replace it with a macro and
2430 move it to mathoms.c as a macro would evaluate name twice. */
2432 Perl_get_cv(pTHX_ const char *name, I32 flags)
2434 PERL_ARGS_ASSERT_GET_CV;
2436 return get_cvn_flags(name, strlen(name), flags);
2439 /* Be sure to refetch the stack pointer after calling these routines. */
2443 =head1 Callback Functions
2445 =for apidoc p||call_argv
2447 Performs a callback to the specified Perl sub. See L<perlcall>.
2453 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2455 /* See G_* flags in cop.h */
2456 /* null terminated arg list */
2461 PERL_ARGS_ASSERT_CALL_ARGV;
2466 mXPUSHs(newSVpv(*argv,0));
2471 return call_pv(sub_name, flags);
2475 =for apidoc p||call_pv
2477 Performs a callback to the specified Perl sub. See L<perlcall>.
2483 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2484 /* name of the subroutine */
2485 /* See G_* flags in cop.h */
2487 PERL_ARGS_ASSERT_CALL_PV;
2489 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2493 =for apidoc p||call_method
2495 Performs a callback to the specified Perl method. The blessed object must
2496 be on the stack. See L<perlcall>.
2502 Perl_call_method(pTHX_ const char *methname, I32 flags)
2503 /* name of the subroutine */
2504 /* See G_* flags in cop.h */
2507 PERL_ARGS_ASSERT_CALL_METHOD;
2509 len = strlen(methname);
2511 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2512 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2515 /* May be called with any of a CV, a GV, or an SV containing the name. */
2517 =for apidoc p||call_sv
2519 Performs a callback to the Perl sub whose name is in the SV. See
2526 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2527 /* See G_* flags in cop.h */
2530 LOGOP myop; /* fake syntax tree node */
2535 bool oldcatch = CATCH_GET;
2537 OP* const oldop = PL_op;
2540 PERL_ARGS_ASSERT_CALL_SV;
2542 if (flags & G_DISCARD) {
2546 if (!(flags & G_WANT)) {
2547 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2552 Zero(&myop, 1, LOGOP);
2553 myop.op_next = NULL;
2554 if (!(flags & G_NOARGS))
2555 myop.op_flags |= OPf_STACKED;
2556 myop.op_flags |= OP_GIMME_REVERSE(flags);
2560 EXTEND(PL_stack_sp, 1);
2561 *++PL_stack_sp = sv;
2563 oldscope = PL_scopestack_ix;
2565 if (PERLDB_SUB && PL_curstash != PL_debstash
2566 /* Handle first BEGIN of -d. */
2567 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2568 /* Try harder, since this may have been a sighandler, thus
2569 * curstash may be meaningless. */
2570 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2571 && !(flags & G_NODEBUG))
2572 PL_op->op_private |= OPpENTERSUB_DB;
2574 if (flags & G_METHOD) {
2575 Zero(&method_op, 1, UNOP);
2576 method_op.op_next = PL_op;
2577 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2578 method_op.op_type = OP_METHOD;
2579 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2580 myop.op_type = OP_ENTERSUB;
2581 PL_op = (OP*)&method_op;
2584 if (!(flags & G_EVAL)) {
2586 CALL_BODY_SUB((OP*)&myop);
2587 retval = PL_stack_sp - (PL_stack_base + oldmark);
2588 CATCH_SET(oldcatch);
2591 myop.op_other = (OP*)&myop;
2593 create_eval_scope(flags|G_FAKINGEVAL);
2601 CALL_BODY_SUB((OP*)&myop);
2602 retval = PL_stack_sp - (PL_stack_base + oldmark);
2603 if (!(flags & G_KEEPERR)) {
2611 /* my_exit() was called */
2612 PL_curstash = PL_defstash;
2619 PL_op = PL_restartop;
2623 PL_stack_sp = PL_stack_base + oldmark;
2624 if ((flags & G_WANT) == G_ARRAY)
2628 *++PL_stack_sp = &PL_sv_undef;
2633 if (PL_scopestack_ix > oldscope)
2634 delete_eval_scope();
2638 if (flags & G_DISCARD) {
2639 PL_stack_sp = PL_stack_base + oldmark;
2648 /* Eval a string. The G_EVAL flag is always assumed. */
2651 =for apidoc p||eval_sv
2653 Tells Perl to C<eval> the string in the SV.
2659 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2661 /* See G_* flags in cop.h */
2665 UNOP myop; /* fake syntax tree node */
2666 VOL I32 oldmark = SP - PL_stack_base;
2669 OP* const oldop = PL_op;
2672 PERL_ARGS_ASSERT_EVAL_SV;
2674 if (flags & G_DISCARD) {
2681 Zero(PL_op, 1, UNOP);
2682 EXTEND(PL_stack_sp, 1);
2683 *++PL_stack_sp = sv;
2685 if (!(flags & G_NOARGS))
2686 myop.op_flags = OPf_STACKED;
2687 myop.op_next = NULL;
2688 myop.op_type = OP_ENTEREVAL;
2689 myop.op_flags |= OP_GIMME_REVERSE(flags);
2690 if (flags & G_KEEPERR)
2691 myop.op_flags |= OPf_SPECIAL;
2693 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2694 * before a PUSHEVAL, which corrupts the stack after a croak */
2695 TAINT_PROPER("eval_sv()");
2701 CALL_BODY_EVAL((OP*)&myop);
2702 retval = PL_stack_sp - (PL_stack_base + oldmark);
2703 if (!(flags & G_KEEPERR)) {
2711 /* my_exit() was called */
2712 PL_curstash = PL_defstash;
2719 PL_op = PL_restartop;
2723 PL_stack_sp = PL_stack_base + oldmark;
2724 if ((flags & G_WANT) == G_ARRAY)
2728 *++PL_stack_sp = &PL_sv_undef;
2734 if (flags & G_DISCARD) {
2735 PL_stack_sp = PL_stack_base + oldmark;
2745 =for apidoc p||eval_pv
2747 Tells Perl to C<eval> the given string and return an SV* result.
2753 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2757 SV* sv = newSVpv(p, 0);
2759 PERL_ARGS_ASSERT_EVAL_PV;
2761 eval_sv(sv, G_SCALAR);
2768 if (croak_on_error && SvTRUE(ERRSV)) {
2769 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2775 /* Require a module. */
2778 =head1 Embedding Functions
2780 =for apidoc p||require_pv
2782 Tells Perl to C<require> the file named by the string argument. It is
2783 analogous to the Perl code C<eval "require '$file'">. It's even
2784 implemented that way; consider using load_module instead.
2789 Perl_require_pv(pTHX_ const char *pv)
2795 PERL_ARGS_ASSERT_REQUIRE_PV;
2797 PUSHSTACKi(PERLSI_REQUIRE);
2799 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2800 eval_sv(sv_2mortal(sv), G_DISCARD);
2806 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2808 /* This message really ought to be max 23 lines.
2809 * Removed -h because the user already knows that option. Others? */
2811 static const char * const usage_msg[] = {
2812 "-0[octal] specify record separator (\\0, if no argument)",
2813 "-a autosplit mode with -n or -p (splits $_ into @F)",
2814 "-C[number/list] enables the listed Unicode features",
2815 "-c check syntax only (runs BEGIN and CHECK blocks)",
2816 "-d[:debugger] run program under debugger",
2817 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2818 "-e program one line of program (several -e's allowed, omit programfile)",
2819 "-E program like -e, but enables all optional features",
2820 "-f don't do $sitelib/sitecustomize.pl at startup",
2821 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2822 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2823 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2824 "-l[octal] enable line ending processing, specifies line terminator",
2825 "-[mM][-]module execute \"use/no module...\" before executing program",
2826 "-n assume \"while (<>) { ... }\" loop around program",
2827 "-p assume loop like -n but print line also, like sed",
2828 "-s enable rudimentary parsing for switches after programfile",
2829 "-S look for programfile using PATH environment variable",
2830 "-t enable tainting warnings",
2831 "-T enable tainting checks",
2832 "-u dump core after parsing program",
2833 "-U allow unsafe operations",
2834 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2835 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2836 "-w enable many useful warnings (RECOMMENDED)",
2837 "-W enable all warnings",
2838 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2839 "-X disable all warnings",
2843 const char * const *p = usage_msg;
2845 PERL_ARGS_ASSERT_USAGE;
2847 PerlIO_printf(PerlIO_stdout(),
2848 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2851 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2854 /* convert a string of -D options (or digits) into an int.
2855 * sets *s to point to the char after the options */
2859 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2861 static const char * const usage_msgd[] = {
2862 " Debugging flag values: (see also -d)",
2863 " p Tokenizing and parsing (with v, displays parse stack)",
2864 " s Stack snapshots (with v, displays all stacks)",
2865 " l Context (loop) stack processing",
2866 " t Trace execution",
2867 " o Method and overloading resolution",
2868 " c String/numeric conversions",
2869 " P Print profiling info, source file input state",
2870 " m Memory and SV allocation",
2871 " f Format processing",
2872 " r Regular expression parsing and execution",
2873 " x Syntax tree dump",
2874 " u Tainting checks",
2875 " H Hash dump -- usurps values()",
2876 " X Scratchpad allocation",
2879 " R Include reference counts of dumped variables (eg when using -Ds)",
2880 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2881 " v Verbose: use in conjunction with other flags",
2883 " A Consistency checks on internal structures",
2884 " q quiet - currently only suppresses the 'EXECUTING' message",
2885 " M trace smart match resolution",
2886 " B dump suBroutine definitions, including special Blocks like BEGIN",
2891 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2894 /* if adding extra options, remember to update DEBUG_MASK */
2895 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2897 for (; isALNUM(**s); (*s)++) {
2898 const char * const d = strchr(debopts,**s);
2900 i |= 1 << (d - debopts);
2901 else if (ckWARN_d(WARN_DEBUGGING))
2902 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2903 "invalid option -D%c, use -D'' to see choices\n", **s);
2906 else if (isDIGIT(**s)) {
2908 for (; isALNUM(**s); (*s)++) ;
2910 else if (givehelp) {
2911 const char *const *p = usage_msgd;
2912 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2915 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2916 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2917 "-Dp not implemented on this platform\n");
2923 /* This routine handles any switches that can be given during run */
2926 Perl_moreswitches(pTHX_ const char *s)
2930 const char option = *s; /* used to remember option in -m/-M code */
2932 PERL_ARGS_ASSERT_MORESWITCHES;
2940 SvREFCNT_dec(PL_rs);
2941 if (s[1] == 'x' && s[2]) {
2942 const char *e = s+=2;
2948 flags = PERL_SCAN_SILENT_ILLDIGIT;
2949 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2950 if (s + numlen < e) {
2951 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2955 PL_rs = newSVpvs("");
2956 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2957 tmps = (U8*)SvPVX(PL_rs);
2958 uvchr_to_utf8(tmps, rschar);
2959 SvCUR_set(PL_rs, UNISKIP(rschar));
2964 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2965 if (rschar & ~((U8)~0))
2966 PL_rs = &PL_sv_undef;
2967 else if (!rschar && numlen >= 2)
2968 PL_rs = newSVpvs("");
2970 char ch = (char)rschar;
2971 PL_rs = newSVpvn(&ch, 1);
2974 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2979 PL_unicode = parse_unicode_opts( (const char **)&s );
2980 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2986 while (*s && !isSPACE(*s)) ++s;
2987 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2998 forbid_setid('d', FALSE);
3001 /* -dt indicates to the debugger that threads will be used */
3002 if (*s == 't' && !isALNUM(s[1])) {
3004 my_setenv("PERL5DB_THREADED", "1");
3007 /* The following permits -d:Mod to accepts arguments following an =
3008 in the fashion that -MSome::Mod does. */
3009 if (*s == ':' || *s == '=') {
3010 const char *start = ++s;
3011 const char *const end = s + strlen(s);
3012 SV * const sv = newSVpvs("use Devel::");
3014 /* We now allow -d:Module=Foo,Bar */
3015 while(isALNUM(*s) || *s==':') ++s;
3017 sv_catpvn(sv, start, end - start);
3019 sv_catpvn(sv, start, s-start);
3020 /* Don't use NUL as q// delimiter here, this string goes in the
3022 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3025 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3029 PL_perldb = PERLDB_ALL;
3036 forbid_setid('D', FALSE);
3038 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3039 #else /* !DEBUGGING */
3040 if (ckWARN_d(WARN_DEBUGGING))
3041 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3042 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3043 for (s++; isALNUM(*s); s++) ;
3048 usage(PL_origargv[0]);
3051 Safefree(PL_inplace);
3052 #if defined(__CYGWIN__) /* do backup extension automagically */
3053 if (*(s+1) == '\0') {
3054 PL_inplace = savepvs(".bak");
3057 #endif /* __CYGWIN__ */
3059 const char * const start = ++s;
3060 while (*s && !isSPACE(*s))
3063 PL_inplace = savepvn(start, s - start);
3067 if (*s == '-') /* Additional switches on #! line. */
3071 case 'I': /* -I handled both here and in parse_body() */
3072 forbid_setid('I', FALSE);
3074 while (*s && isSPACE(*s))
3079 /* ignore trailing spaces (possibly followed by other switches) */
3081 for (e = p; *e && !isSPACE(*e); e++) ;
3085 } while (*p && *p != '-');
3087 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3093 Perl_croak(aTHX_ "No directory specified for -I");
3099 SvREFCNT_dec(PL_ors_sv);
3105 PL_ors_sv = newSVpvs("\n");
3106 numlen = 3 + (*s == '0');
3107 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3111 if (RsPARA(PL_rs)) {
3112 PL_ors_sv = newSVpvs("\n\n");
3115 PL_ors_sv = newSVsv(PL_rs);
3120 forbid_setid('M', FALSE); /* XXX ? */
3123 forbid_setid('m', FALSE); /* XXX ? */
3128 const char *use = "use ";
3130 /* -M-foo == 'no foo' */
3131 /* Leading space on " no " is deliberate, to make both
3132 possibilities the same length. */
3133 if (*s == '-') { use = " no "; ++s; }
3134 sv = newSVpvn(use,4);
3136 /* We allow -M'Module qw(Foo Bar)' */
3137 while(isALNUM(*s) || *s==':') {
3146 Perl_croak(aTHX_ "Module name required with -%c option",
3149 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3150 "contains single ':'",
3151 (int)(s - start), start, option);
3152 end = s + strlen(s);
3154 sv_catpvn(sv, start, end - start);
3155 if (option == 'm') {
3157 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3158 sv_catpvs( sv, " ()");
3161 sv_catpvn(sv, start, s-start);
3162 /* Use NUL as q''-delimiter. */
3163 sv_catpvs(sv, " split(/,/,q\0");
3165 sv_catpvn(sv, s, end - s);
3166 sv_catpvs(sv, "\0)");
3169 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3172 Perl_croak(aTHX_ "Missing argument to -%c", option);
3183 forbid_setid('s', FALSE);
3184 PL_doswitches = TRUE;
3198 PL_do_undump = TRUE;
3206 if (!sv_derived_from(PL_patchlevel, "version"))
3207 upg_version(PL_patchlevel, TRUE);
3210 SV* level= vstringify(PL_patchlevel);
3211 #ifdef PERL_PATCHNUM
3212 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3213 SV *num = newSVpvs(PERL_PATCHNUM "*");
3215 SV *num = newSVpvs(PERL_PATCHNUM);
3218 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3219 SvREFCNT_dec(level);
3222 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3226 PerlIO_printf(PerlIO_stdout(),
3227 "\nThis is perl " STRINGIFY(PERL_REVISION)
3228 ", version " STRINGIFY(PERL_VERSION)
3229 ", subversion " STRINGIFY(PERL_SUBVERSION)
3230 " (%"SVf") built for " ARCHNAME, level
3232 SvREFCNT_dec(level);
3235 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3236 PerlIO_printf(PerlIO_stdout(),
3237 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3238 SVfARG(vstringify(PL_patchlevel))));
3239 PerlIO_printf(PerlIO_stdout(),
3240 Perl_form(aTHX_ " built under %s at %s %s\n",
3241 OSNAME, __DATE__, __TIME__));
3242 PerlIO_printf(PerlIO_stdout(),
3243 Perl_form(aTHX_ " OS Specific Release: %s\n",
3246 #if defined(LOCAL_PATCH_COUNT)
3247 if (LOCAL_PATCH_COUNT > 0)
3248 PerlIO_printf(PerlIO_stdout(),
3249 "\n(with %d registered patch%s, "
3250 "see perl -V for more detail)",
3252 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\n\nCopyright 1987-2009, Larry Wall\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3264 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3269 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "atariST series port, ++jrb bammi@cadence.com\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "EPOC port by Olaf Flebbe, 1999-2002\n");
3304 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3305 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3308 #ifdef __SYMBIAN32__
3309 PerlIO_printf(PerlIO_stdout(),
3310 "Symbian port by Nokia, 2004-2005\n");
3312 #ifdef BINARY_BUILD_NOTICE
3313 BINARY_BUILD_NOTICE;
3315 PerlIO_printf(PerlIO_stdout(),
3317 Perl may be copied only under the terms of either the Artistic License or the\n\
3318 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3319 Complete documentation for Perl, including FAQ lists, should be found on\n\
3320 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3321 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3324 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3325 PL_dowarn |= G_WARN_ON;
3330 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3331 if (!specialWARN(PL_compiling.cop_warnings))
3332 PerlMemShared_free(PL_compiling.cop_warnings);
3333 PL_compiling.cop_warnings = pWARN_ALL ;
3337 PL_dowarn = G_WARN_ALL_OFF;
3338 if (!specialWARN(PL_compiling.cop_warnings))
3339 PerlMemShared_free(PL_compiling.cop_warnings);
3340 PL_compiling.cop_warnings = pWARN_NONE ;
3347 if (s[0] == '-') /* Additional switches on #! line. */
3352 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3358 #ifdef ALTERNATE_SHEBANG
3359 case 'S': /* OS/2 needs -S on "extproc" line. */
3363 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3368 /* compliments of Tom Christiansen */
3370 /* unexec() can be found in the Gnu emacs distribution */
3371 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3374 Perl_my_unexec(pTHX)
3376 PERL_UNUSED_CONTEXT;
3378 SV * prog = newSVpv(BIN_EXP, 0);
3379 SV * file = newSVpv(PL_origfilename, 0);
3383 sv_catpvs(prog, "/perl");
3384 sv_catpvs(file, ".perldump");
3386 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3387 /* unexec prints msg to stderr in case of failure */
3388 PerlProc_exit(status);
3391 # include <lib$routines.h>
3392 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3393 # elif defined(WIN32) || defined(__CYGWIN__)
3394 Perl_croak(aTHX_ "dump is not supported");
3396 ABORT(); /* for use with undump */
3401 /* initialize curinterp */
3407 # define PERLVAR(var,type)
3408 # define PERLVARA(var,n,type)
3409 # if defined(PERL_IMPLICIT_CONTEXT)
3410 # define PERLVARI(var,type,init) aTHX->var = init;
3411 # define PERLVARIC(var,type,init) aTHX->var = init;
3413 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3414 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3416 # include "intrpvar.h"
3422 # define PERLVAR(var,type)
3423 # define PERLVARA(var,n,type)
3424 # define PERLVARI(var,type,init) PL_##var = init;
3425 # define PERLVARIC(var,type,init) PL_##var = init;
3426 # include "intrpvar.h"
3433 /* As these are inside a structure, PERLVARI isn't capable of initialising
3435 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3436 PL_reg_poscache = PL_reg_starttry = NULL;
3440 S_init_main_stash(pTHX)
3445 PL_curstash = PL_defstash = newHV();
3446 /* We know that the string "main" will be in the global shared string
3447 table, so it's a small saving to use it rather than allocate another
3449 PL_curstname = newSVpvs_share("main");
3450 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3451 /* If we hadn't caused another reference to "main" to be in the shared
3452 string table above, then it would be worth reordering these two,
3453 because otherwise all we do is delete "main" from it as a consequence
3454 of the SvREFCNT_dec, only to add it again with hv_name_set */
3455 SvREFCNT_dec(GvHV(gv));
3456 hv_name_set(PL_defstash, "main", 4, 0);
3457 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3459 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3461 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3462 GvMULTI_on(PL_incgv);
3463 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3464 GvMULTI_on(PL_hintgv);
3465 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3466 SvREFCNT_inc_simple_void(PL_defgv);
3467 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3468 SvREFCNT_inc_simple_void(PL_errgv);
3469 GvMULTI_on(PL_errgv);
3470 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3471 GvMULTI_on(PL_replgv);
3472 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3473 #ifdef PERL_DONT_CREATE_GVSV
3476 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3478 PL_curstash = PL_defstash;
3479 CopSTASH_set(&PL_compiling, PL_defstash);
3480 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3481 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3483 /* We must init $/ before switches are processed. */
3484 sv_setpvs(get_sv("/", GV_ADD), "\n");
3488 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3489 bool *suidscript, PerlIO **rsfpp)
3494 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3497 PL_origfilename = savepvs("-e");
3500 /* if find_script() returns, it returns a malloc()-ed value */
3501 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3503 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3504 const char *s = scriptname + 8;
3510 * Tell apart "normal" usage of fdscript, e.g.
3511 * with bash on FreeBSD:
3512 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3513 * from usage in suidperl.
3514 * Does any "normal" usage leave garbage after the number???
3515 * Is it a mistake to use a similar /dev/fd/ construct for
3520 * Be supersafe and do some sanity-checks.
3521 * Still, can we be sure we got the right thing?
3524 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3527 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3529 scriptname = savepv(s + 1);
3530 Safefree(PL_origfilename);
3531 PL_origfilename = (char *)scriptname;
3536 CopFILE_free(PL_curcop);
3537 CopFILE_set(PL_curcop, PL_origfilename);
3538 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3539 scriptname = (char *)"";
3540 if (fdscript >= 0) {
3541 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3542 # if defined(HAS_FCNTL) && defined(F_SETFD)
3544 /* ensure close-on-exec */
3545 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3548 else if (!*scriptname) {
3549 forbid_setid(0, *suidscript);
3550 *rsfpp = PerlIO_stdin();
3553 #ifdef FAKE_BIT_BUCKET
3554 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3555 * is called) and still have the "-e" work. (Believe it or not,
3556 * a /dev/null is required for the "-e" to work because source
3557 * filter magic is used to implement it. ) This is *not* a general
3558 * replacement for a /dev/null. What we do here is create a temp
3559 * file (an empty file), open up that as the script, and then
3560 * immediately close and unlink it. Close enough for jazz. */
3561 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3562 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3563 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3564 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3565 FAKE_BIT_BUCKET_TEMPLATE
3567 const char * const err = "Failed to create a fake bit bucket";
3568 if (strEQ(scriptname, BIT_BUCKET)) {
3569 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3570 int tmpfd = mkstemp(tmpname);
3572 scriptname = tmpname;
3575 Perl_croak(aTHX_ err);
3578 scriptname = mktemp(tmpname);
3580 Perl_croak(aTHX_ err);
3585 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3586 #ifdef FAKE_BIT_BUCKET
3587 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3588 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3589 && strlen(scriptname) == sizeof(tmpname) - 1) {
3592 scriptname = BIT_BUCKET;
3594 # if defined(HAS_FCNTL) && defined(F_SETFD)
3596 /* ensure close-on-exec */
3597 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3601 /* PSz 16 Sep 03 Keep neat error message */
3603 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3605 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3606 CopFILE(PL_curcop), Strerror(errno));
3612 * I_SYSSTATVFS HAS_FSTATVFS
3614 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3615 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3616 * here so that metaconfig picks them up. */
3619 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3620 /* Don't even need this function. */
3623 S_validate_suid(pTHX_ PerlIO *rsfp)
3625 PERL_ARGS_ASSERT_VALIDATE_SUID;
3627 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3630 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3631 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3633 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3636 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3637 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3638 /* not set-id, must be wrapped */
3641 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3644 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3648 register const char *s2;
3650 PERL_ARGS_ASSERT_FIND_BEGINNING;
3652 /* skip forward in input to the real script? */
3654 while (PL_doextract) {
3655 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3656 Perl_croak(aTHX_ "No Perl script found in input\n");
3658 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3659 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3660 PL_doextract = FALSE;
3661 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3663 while (*s == ' ' || *s == '\t') s++;
3665 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3666 || s2[-1] == '_') s2--;
3667 if (strnEQ(s2-4,"perl",4))
3668 while ((s = moreswitches(s)))
3680 PL_uid = PerlProc_getuid();
3681 PL_euid = PerlProc_geteuid();
3682 PL_gid = PerlProc_getgid();
3683 PL_egid = PerlProc_getegid();
3685 PL_uid |= PL_gid << 16;
3686 PL_euid |= PL_egid << 16;
3688 /* Should not happen: */
3689 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3690 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3693 * Should go by suidscript, not uid!=euid: why disallow
3694 * system("ls") in scripts run from setuid things?
3695 * Or, is this run before we check arguments and set suidscript?
3696 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3697 * (We never have suidscript, can we be sure to have fdscript?)
3698 * Or must then go by UID checks? See comments in forbid_setid also.
3702 /* This is used very early in the lifetime of the program,
3703 * before even the options are parsed, so PL_tainting has
3704 * not been initialized properly. */
3706 Perl_doing_taint(int argc, char *argv[], char *envp[])
3708 #ifndef PERL_IMPLICIT_SYS
3709 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3710 * before we have an interpreter-- and the whole point of this
3711 * function is to be called at such an early stage. If you are on
3712 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3713 * "tainted because running with altered effective ids', you'll
3714 * have to add your own checks somewhere in here. The two most
3715 * known samples of 'implicitness' are Win32 and NetWare, neither
3716 * of which has much of concept of 'uids'. */
3717 int uid = PerlProc_getuid();
3718 int euid = PerlProc_geteuid();
3719 int gid = PerlProc_getgid();
3720 int egid = PerlProc_getegid();
3727 if (uid && (euid != uid || egid != gid))
3729 #endif /* !PERL_IMPLICIT_SYS */
3730 /* This is a really primitive check; environment gets ignored only
3731 * if -T are the first chars together; otherwise one gets
3732 * "Too late" message. */
3733 if ( argc > 1 && argv[1][0] == '-'
3734 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3739 /* Passing the flag as a single char rather than a string is a slight space
3740 optimisation. The only message that isn't /^-.$/ is
3741 "program input from stdin", which is substituted in place of '\0', which
3742 could never be a command line flag. */
3744 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3747 char string[3] = "-x";
3748 const char *message = "program input from stdin";
3755 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3756 if (PL_euid != PL_uid)
3757 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3758 if (PL_egid != PL_gid)
3759 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3760 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3762 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3766 Perl_init_debugger(pTHX)
3769 HV * const ostash = PL_curstash;
3771 PL_curstash = PL_debstash;
3772 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3774 AvREAL_off(PL_dbargs);
3775 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3776 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3777 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3778 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3779 sv_setiv(PL_DBsingle, 0);
3780 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3781 sv_setiv(PL_DBtrace, 0);
3782 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3783 sv_setiv(PL_DBsignal, 0);
3784 PL_curstash = ostash;
3787 #ifndef STRESS_REALLOC
3788 #define REASONABLE(size) (size)
3790 #define REASONABLE(size) (1) /* unreasonable */
3794 Perl_init_stacks(pTHX)
3797 /* start with 128-item stack and 8K cxstack */
3798 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3799 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3800 PL_curstackinfo->si_type = PERLSI_MAIN;
3801 PL_curstack = PL_curstackinfo->si_stack;
3802 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3804 PL_stack_base = AvARRAY(PL_curstack);
3805 PL_stack_sp = PL_stack_base;
3806 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3808 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3811 PL_tmps_max = REASONABLE(128);
3813 Newx(PL_markstack,REASONABLE(32),I32);
3814 PL_markstack_ptr = PL_markstack;
3815 PL_markstack_max = PL_markstack + REASONABLE(32);
3819 Newx(PL_scopestack,REASONABLE(32),I32);
3821 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3823 PL_scopestack_ix = 0;
3824 PL_scopestack_max = REASONABLE(32);
3826 Newx(PL_savestack,REASONABLE(128),ANY);
3827 PL_savestack_ix = 0;
3828 PL_savestack_max = REASONABLE(128);
3837 while (PL_curstackinfo->si_next)
3838 PL_curstackinfo = PL_curstackinfo->si_next;
3839 while (PL_curstackinfo) {
3840 PERL_SI *p = PL_curstackinfo->si_prev;
3841 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3842 Safefree(PL_curstackinfo->si_cxstack);
3843 Safefree(PL_curstackinfo);
3844 PL_curstackinfo = p;
3846 Safefree(PL_tmps_stack);
3847 Safefree(PL_markstack);
3848 Safefree(PL_scopestack);
3850 Safefree(PL_scopestack_name);
3852 Safefree(PL_savestack);
3857 S_init_predump_symbols(pTHX)
3863 sv_setpvs(get_sv("\"", GV_ADD), " ");
3864 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3866 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3867 GvMULTI_on(PL_stdingv);
3868 io = GvIOp(PL_stdingv);
3869 IoTYPE(io) = IoTYPE_RDONLY;
3870 IoIFP(io) = PerlIO_stdin();
3871 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3873 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3875 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3878 IoTYPE(io) = IoTYPE_WRONLY;
3879 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3881 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3883 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3885 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3886 GvMULTI_on(PL_stderrgv);
3887 io = GvIOp(PL_stderrgv);
3888 IoTYPE(io) = IoTYPE_WRONLY;
3889 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3890 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3892 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3894 PL_statname = newSV(0); /* last filename we did stat on */
3898 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3902 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3904 argc--,argv++; /* skip name of script */
3905 if (PL_doswitches) {
3906 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3910 if (argv[0][1] == '-' && !argv[0][2]) {
3914 if ((s = strchr(argv[0], '='))) {
3915 const char *const start_name = argv[0] + 1;
3916 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3917 TRUE, SVt_PV)), s + 1);
3920 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3923 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3924 GvMULTI_on(PL_argvgv);
3925 (void)gv_AVadd(PL_argvgv);
3926 av_clear(GvAVn(PL_argvgv));
3927 for (; argc > 0; argc--,argv++) {
3928 SV * const sv = newSVpv(argv[0],0);
3929 av_push(GvAVn(PL_argvgv),sv);
3930 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3931 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3934 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3935 (void)sv_utf8_decode(sv);
3941 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3946 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3948 PL_toptarget = newSV_type(SVt_PVFM);
3949 sv_setpvs(PL_toptarget, "");
3950 PL_bodytarget = newSV_type(SVt_PVFM);
3951 sv_setpvs(PL_bodytarget, "");
3952 PL_formtarget = PL_bodytarget;
3956 init_argv_symbols(argc,argv);
3958 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3959 sv_setpv(GvSV(tmpgv),PL_origfilename);
3961 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3963 bool env_is_not_environ;
3964 GvMULTI_on(PL_envgv);
3965 hv = GvHVn(PL_envgv);
3966 hv_magic(hv, NULL, PERL_MAGIC_env);
3968 #ifdef USE_ENVIRON_ARRAY
3969 /* Note that if the supplied env parameter is actually a copy
3970 of the global environ then it may now point to free'd memory
3971 if the environment has been modified since. To avoid this
3972 problem we treat env==NULL as meaning 'use the default'
3976 env_is_not_environ = env != environ;
3977 if (env_is_not_environ
3978 # ifdef USE_ITHREADS
3979 && PL_curinterp == aTHX
3988 for (; *env; env++) {
3991 if (!(s = strchr(old_var,'=')) || s == old_var)
3994 #if defined(MSDOS) && !defined(DJGPP)
3996 (void)strupr(old_var);
3999 sv = newSVpv(s+1, 0);
4000 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4001 if (env_is_not_environ)
4005 #endif /* USE_ENVIRON_ARRAY */
4006 #endif /* !PERL_MICRO */
4009 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4010 SvREADONLY_off(GvSV(tmpgv));
4011 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4012 SvREADONLY_on(GvSV(tmpgv));
4014 #ifdef THREADS_HAVE_PIDS
4015 PL_ppid = (IV)getppid();
4018 /* touch @F array to prevent spurious warnings 20020415 MJD */
4020 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4025 S_init_perllib(pTHX)
4029 const char *perl5lib = NULL;
4032 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4038 perl5lib = PerlEnv_getenv("PERL5LIB");
4040 * It isn't possible to delete an environment variable with
4041 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4042 * case we treat PERL5LIB as undefined if it has a zero-length value.
4044 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4045 if (perl5lib && *perl5lib != '\0')
4049 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4051 s = PerlEnv_getenv("PERLLIB");
4053 incpush_use_sep(s, 0, 0);
4056 /* Treat PERL5?LIB as a possible search list logical name -- the
4057 * "natural" VMS idiom for a Unix path string. We allow each
4058 * element to be a set of |-separated directories for compatibility.
4062 if (my_trnlnm("PERL5LIB",buf,0))
4064 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4065 } while (my_trnlnm("PERL5LIB",buf,++idx));
4067 while (my_trnlnm("PERLLIB",buf,idx++))
4068 incpush_use_sep(buf, 0, 0);
4073 #ifndef PERL_IS_MINIPERL
4074 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4075 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4077 /* Use the ~-expanded versions of APPLLIB (undocumented),
4078 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4081 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4082 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4086 /* sitearch is always relative to sitelib on Windows for
4087 * DLL-based path intuition to work correctly */
4088 # if !defined(WIN32)
4089 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4090 INCPUSH_CAN_RELOCATE);
4096 /* this picks up sitearch as well */
4097 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4099 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4101 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4105 #ifdef PERL_VENDORARCH_EXP
4106 /* vendorarch is always relative to vendorlib on Windows for
4107 * DLL-based path intuition to work correctly */
4108 # if !defined(WIN32)
4109 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4110 INCPUSH_CAN_RELOCATE);
4114 #ifdef PERL_VENDORLIB_EXP
4116 /* this picks up vendorarch as well */
4117 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4119 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4121 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4122 INCPUSH_CAN_RELOCATE);
4127 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4131 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4135 s = win32_get_privlib(PERL_FS_VERSION, &len);
4137 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4140 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4142 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4146 #ifdef PERL_OTHERLIBDIRS
4147 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4148 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4149 |INCPUSH_CAN_RELOCATE);
4155 * It isn't possible to delete an environment variable with
4156 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4157 * case we treat PERL5LIB as undefined if it has a zero-length value.
4159 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4160 if (perl5lib && *perl5lib != '\0')
4164 incpush_use_sep(perl5lib, 0,
4165 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4167 /* Treat PERL5?LIB as a possible search list logical name -- the
4168 * "natural" VMS idiom for a Unix path string. We allow each
4169 * element to be a set of |-separated directories for compatibility.
4173 if (my_trnlnm("PERL5LIB",buf,0))
4175 incpush_use_sep(buf, 0,
4176 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4177 } while (my_trnlnm("PERL5LIB",buf,++idx));
4181 /* Use the ~-expanded versions of APPLLIB (undocumented),
4182 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4185 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4186 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4189 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4190 /* Search for version-specific dirs below here */
4191 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4192 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4196 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4197 /* Search for version-specific dirs below here */
4198 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4199 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4202 #ifdef PERL_OTHERLIBDIRS
4203 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4204 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4205 |INCPUSH_CAN_RELOCATE);
4207 #endif /* !PERL_IS_MINIPERL */
4210 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4213 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4214 # define PERLLIB_SEP ';'
4217 # define PERLLIB_SEP '|'
4219 # define PERLLIB_SEP ':'
4222 #ifndef PERLLIB_MANGLE
4223 # define PERLLIB_MANGLE(s,n) (s)
4226 /* Push a directory onto @INC if it exists.
4227 Generate a new SV if we do this, to save needing to copy the SV we push
4230 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4235 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4237 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4238 S_ISDIR(tmpstatbuf.st_mode)) {
4240 dir = newSVsv(stem);
4242 /* Truncate dir back to stem. */
4243 SvCUR_set(dir, SvCUR(stem));
4249 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4252 const U8 using_sub_dirs
4253 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4254 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4255 const U8 add_versioned_sub_dirs
4256 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4257 const U8 add_archonly_sub_dirs
4258 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4259 #ifdef PERL_INC_VERSION_LIST
4260 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4262 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4263 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4264 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4265 AV *const inc = GvAVn(PL_incgv);
4267 PERL_ARGS_ASSERT_INCPUSH;
4270 /* Could remove this vestigial extra block, if we don't mind a lot of
4271 re-indenting diff noise. */
4274 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4275 arranged to unshift #! line -I onto the front of @INC. However,
4276 -I can add version and architecture specific libraries, and they
4277 need to go first. The old code assumed that it was always
4278 pushing. Hence to make it work, need to push the architecture
4279 (etc) libraries onto a temporary array, then "unshift" that onto
4280 the front of @INC. */
4281 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4284 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4285 defined to so something (in os2/os2.c), but the code has been
4286 this way, ignoring any possible changed of length, since
4287 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4289 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4291 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4294 /* Do the if() outside the #ifdef to avoid warnings about an unused
4297 #ifdef PERL_RELOCATABLE_INC
4299 * Relocatable include entries are marked with a leading .../
4302 * 0: Remove that leading ".../"
4303 * 1: Remove trailing executable name (anything after the last '/')
4304 * from the perl path to give a perl prefix
4306 * While the @INC element starts "../" and the prefix ends with a real
4307 * directory (ie not . or ..) chop that real directory off the prefix
4308 * and the leading "../" from the @INC element. ie a logical "../"
4310 * Finally concatenate the prefix and the remainder of the @INC element
4311 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4312 * generates /usr/local/lib/perl5
4314 const char *libpath = SvPVX(libdir);
4315 STRLEN libpath_len = SvCUR(libdir);
4316 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4318 SV * const caret_X = get_sv("\030", 0);
4319 /* Going to use the SV just as a scratch buffer holding a C
4325 /* $^X is *the* source of taint if tainting is on, hence
4326 SvPOK() won't be true. */
4328 assert(SvPOKp(caret_X));
4329 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4331 /* Firstly take off the leading .../
4332 If all else fail we'll do the paths relative to the current
4334 sv_chop(libdir, libpath + 4);
4335 /* Don't use SvPV as we're intentionally bypassing taining,
4336 mortal copies that the mg_get of tainting creates, and
4337 corruption that seems to come via the save stack.
4338 I guess that the save stack isn't correctly set up yet. */
4339 libpath = SvPVX(libdir);
4340 libpath_len = SvCUR(libdir);
4342 /* This would work more efficiently with memrchr, but as it's
4343 only a GNU extension we'd need to probe for it and
4344 implement our own. Not hard, but maybe not worth it? */
4346 prefix = SvPVX(prefix_sv);
4347 lastslash = strrchr(prefix, '/');
4349 /* First time in with the *lastslash = '\0' we just wipe off
4350 the trailing /perl from (say) /usr/foo/bin/perl
4354 while ((*lastslash = '\0'), /* Do that, come what may. */
4355 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4356 && (lastslash = strrchr(prefix, '/')))) {
4357 if (lastslash[1] == '\0'
4358 || (lastslash[1] == '.'
4359 && (lastslash[2] == '/' /* ends "/." */
4360 || (lastslash[2] == '/'
4361 && lastslash[3] == '/' /* or "/.." */
4363 /* Prefix ends "/" or "/." or "/..", any of which
4364 are fishy, so don't do any more logical cleanup.
4368 /* Remove leading "../" from path */
4371 /* Next iteration round the loop removes the last
4372 directory name from prefix by writing a '\0' in
4373 the while clause. */
4375 /* prefix has been terminated with a '\0' to the correct
4376 length. libpath points somewhere into the libdir SV.
4377 We need to join the 2 with '/' and drop the result into
4379 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4380 SvREFCNT_dec(libdir);
4381 /* And this is the new libdir. */
4384 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4385 /* Need to taint reloccated paths if running set ID */
4386 SvTAINTED_on(libdir);
4389 SvREFCNT_dec(prefix_sv);
4394 * BEFORE pushing libdir onto @INC we may first push version- and
4395 * archname-specific sub-directories.
4397 if (using_sub_dirs) {
4399 #ifdef PERL_INC_VERSION_LIST
4400 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4401 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4402 const char * const *incver;
4409 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4411 while (unix[len-1] == '/') len--; /* Cosmetic */
4412 sv_usepvn(libdir,unix,len);
4415 PerlIO_printf(Perl_error_log,
4416 "Failed to unixify @INC element \"%s\"\n",
4420 subdir = newSVsv(libdir);
4422 if (add_versioned_sub_dirs) {
4423 /* .../version/archname if -d .../version/archname */
4424 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4425 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4427 /* .../version if -d .../version */
4428 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4429 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4432 #ifdef PERL_INC_VERSION_LIST
4434 for (incver = incverlist; *incver; incver++) {
4435 /* .../xxx if -d .../xxx */
4436 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4437 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4442 if (add_archonly_sub_dirs) {
4443 /* .../archname if -d .../archname */
4444 sv_catpvs(subdir, "/" ARCHNAME);
4445 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4449 assert (SvREFCNT(subdir) == 1);
4450 SvREFCNT_dec(subdir);
4453 /* finally add this lib directory at the end of @INC */
4455 U32 extra = av_len(av) + 1;
4456 av_unshift(inc, extra + push_basedir);
4458 av_store(inc, extra, libdir);
4460 /* av owns a reference, av_store() expects to be donated a
4461 reference, and av expects to be sane when it's cleared.
4462 If I wanted to be naughty and wrong, I could peek inside the
4463 implementation of av_clear(), realise that it uses
4464 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4465 and so directly steal from it (with a memcpy() to inc, and
4466 then memset() to NULL them out. But people copy code from the
4467 core expecting it to be best practise, so let's use the API.
4468 Although studious readers will note that I'm not checking any
4470 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4474 else if (push_basedir) {
4475 av_push(inc, libdir);
4478 if (!push_basedir) {
4479 assert (SvREFCNT(libdir) == 1);
4480 SvREFCNT_dec(libdir);
4486 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4490 /* This logic has been broken out from S_incpush(). It may be possible to
4493 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4500 /* Break at all separators */
4501 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4503 /* skip any consecutive separators */
4505 /* Uncomment the next line for PATH semantics */
4506 /* But you'll need to write tests */
4507 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4509 incpush(p, (STRLEN)(s - p), flags);
4514 incpush(p, (STRLEN)(end - p), flags);
4519 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4523 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4529 PERL_ARGS_ASSERT_CALL_LIST;
4531 while (av_len(paramList) >= 0) {
4532 cv = MUTABLE_CV(av_shift(paramList));
4534 if (paramList == PL_beginav) {
4535 /* save PL_beginav for compiler */
4536 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4538 else if (paramList == PL_checkav) {
4539 /* save PL_checkav for compiler */
4540 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4542 else if (paramList == PL_unitcheckav) {
4543 /* save PL_unitcheckav for compiler */
4544 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4555 PL_madskills |= 16384;
4560 PL_madskills &= ~16384;
4563 (void)SvPV_const(atsv, len);
4565 PL_curcop = &PL_compiling;
4566 CopLINE_set(PL_curcop, oldline);
4567 if (paramList == PL_beginav)
4568 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4570 Perl_sv_catpvf(aTHX_ atsv,
4571 "%s failed--call queue aborted",
4572 paramList == PL_checkav ? "CHECK"
4573 : paramList == PL_initav ? "INIT"
4574 : paramList == PL_unitcheckav ? "UNITCHECK"
4576 while (PL_scopestack_ix > oldscope)
4579 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4586 /* my_exit() was called */
4587 while (PL_scopestack_ix > oldscope)
4590 PL_curstash = PL_defstash;
4591 PL_curcop = &PL_compiling;
4592 CopLINE_set(PL_curcop, oldline);
4598 PL_curcop = &PL_compiling;
4599 CopLINE_set(PL_curcop, oldline);
4602 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4611 Perl_my_exit(pTHX_ U32 status)
4622 STATUS_EXIT_SET(status);
4629 Perl_my_failure_exit(pTHX)
4633 /* We have been called to fall on our sword. The desired exit code
4634 * should be already set in STATUS_UNIX, but could be shifted over
4635 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4638 * If an error code has not been set, then force the issue.
4640 if (MY_POSIX_EXIT) {
4642 /* According to the die_exit.t tests, if errno is non-zero */
4643 /* It should be used for the error status. */
4645 if (errno == EVMSERR) {
4646 STATUS_NATIVE = vaxc$errno;
4649 /* According to die_exit.t tests, if the child_exit code is */
4650 /* also zero, then we need to exit with a code of 255 */
4651 if ((errno != 0) && (errno < 256))
4652 STATUS_UNIX_EXIT_SET(errno);
4653 else if (STATUS_UNIX < 255) {
4654 STATUS_UNIX_EXIT_SET(255);
4659 /* The exit code could have been set by $? or vmsish which
4660 * means that it may not have fatal set. So convert
4661 * success/warning codes to fatal with out changing
4662 * the POSIX status code. The severity makes VMS native
4663 * status handling work, while UNIX mode programs use the
4664 * the POSIX exit codes.
4666 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4667 STATUS_NATIVE &= STS$M_COND_ID;
4668 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4672 /* Traditionally Perl on VMS always expects a Fatal Error. */
4673 if (vaxc$errno & 1) {
4675 /* So force success status to failure */
4676 if (STATUS_NATIVE & 1)
4681 STATUS_UNIX = EINTR; /* In case something cares */
4686 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4688 /* Encode the severity code */
4689 severity = STATUS_NATIVE & STS$M_SEVERITY;
4690 STATUS_UNIX = (severity ? severity : 1) << 8;
4692 /* Perl expects this to be a fatal error */
4693 if (severity != STS$K_SEVERE)
4702 STATUS_UNIX_SET(errno);
4704 exitstatus = STATUS_UNIX >> 8;
4705 if (exitstatus & 255)
4706 STATUS_UNIX_SET(exitstatus);
4708 STATUS_UNIX_SET(255);
4715 S_my_exit_jump(pTHX)
4720 SvREFCNT_dec(PL_e_script);
4724 POPSTACK_TO(PL_mainstack);
4732 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4735 const char * const p = SvPVX_const(PL_e_script);
4736 const char *nl = strchr(p, '\n');
4738 PERL_UNUSED_ARG(idx);
4739 PERL_UNUSED_ARG(maxlen);
4741 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4743 filter_del(read_e_script);
4746 sv_catpvn(buf_sv, p, nl-p);
4747 sv_chop(PL_e_script, nl);
4753 * c-indentation-style: bsd
4755 * indent-tabs-mode: t
4758 * ex: set ts=8 sts=4 sw=4 noet: