4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
7 * You may distribute under the terms of either the GNU General Public
8 * License or the Artistic License, as specified in the README file.
13 * A ship then new they built for him
14 * of mithril and of elven-glass
15 * --from Bilbo's song of EƤrendil
17 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
20 /* This file contains the top-level functions that are used to create, use
21 * and destroy a perl interpreter, plus the functions used by XS code to
22 * call back into perl. Note that it does not contain the actual main()
23 * function of the interpreter; that can be found in perlmain.c
27 #define PERL_IN_PERL_C
29 #include "patchlevel.h" /* for local_patches */
36 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
41 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
43 # include <sys/wait.h>
51 char control[CMSG_SPACE(sizeof(int))];
68 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
69 char *getenv (char *); /* Usually in <stdlib.h> */
72 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
74 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
75 /* Drop everything. Heck, don't even try to call it */
76 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
78 /* Drop almost everything */
79 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
82 #define CALL_BODY_EVAL(myop) \
83 if (PL_op == (myop)) \
84 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
88 #define CALL_BODY_SUB(myop) \
89 if (PL_op == (myop)) \
90 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
94 #define CALL_LIST_BODY(cv) \
95 PUSHMARK(PL_stack_sp); \
96 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
99 S_init_tls_and_interp(PerlInterpreter *my_perl)
103 PERL_SET_INTERP(my_perl);
104 #if defined(USE_ITHREADS)
107 PERL_SET_THX(my_perl);
110 MUTEX_INIT(&PL_dollarzero_mutex);
111 MUTEX_INIT(&PL_my_ctx_mutex);
114 #if defined(USE_ITHREADS)
117 /* This always happens for non-ithreads */
120 PERL_SET_THX(my_perl);
125 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
128 Perl_sys_init(int* argc, char*** argv)
132 PERL_ARGS_ASSERT_SYS_INIT;
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_SYS_INIT_BODY(argc, argv);
140 Perl_sys_init3(int* argc, char*** argv, char*** env)
144 PERL_ARGS_ASSERT_SYS_INIT3;
146 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
147 PERL_UNUSED_ARG(argv);
148 PERL_UNUSED_ARG(env);
149 PERL_SYS_INIT3_BODY(argc, argv, env);
156 if (!PL_veto_cleanup) {
157 PERL_SYS_TERM_BODY();
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
172 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
174 /* Newx() needs interpreter, so call malloc() instead */
175 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
176 S_init_tls_and_interp(my_perl);
177 Zero(my_perl, 1, PerlInterpreter);
187 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
194 =head1 Embedding Functions
196 =for apidoc perl_alloc
198 Allocates a new Perl interpreter. See L<perlembed>.
206 PerlInterpreter *my_perl;
208 /* Newx() needs interpreter, so call malloc() instead */
209 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
211 S_init_tls_and_interp(my_perl);
212 #ifndef PERL_TRACK_MEMPOOL
213 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
215 Zero(my_perl, 1, PerlInterpreter);
216 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
220 #endif /* PERL_IMPLICIT_SYS */
223 =for apidoc perl_construct
225 Initializes a new Perl interpreter. See L<perlembed>.
231 perl_construct(pTHXx)
235 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
239 PL_perl_destruct_level = 1;
241 PERL_UNUSED_ARG(my_perl);
242 if (PL_perl_destruct_level > 0)
245 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. However, as &PL_sv_no doesn't contain
256 a string that is a valid numer, we have to turn the public flags by
262 SvREADONLY_on(&PL_sv_no);
263 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
265 sv_setpv(&PL_sv_yes,PL_Yes);
268 SvREADONLY_on(&PL_sv_yes);
269 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
271 SvREADONLY_on(&PL_sv_placeholder);
272 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
274 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
275 #ifdef PERL_USES_PL_PIDSTATUS
276 PL_pidstatus = newHV();
279 PL_rs = newSVpvs("\n");
289 SET_NUMERIC_STANDARD();
291 #if defined(LOCAL_PATCH_COUNT)
292 PL_localpatches = local_patches; /* For possible -v */
295 #ifdef HAVE_INTERP_INTERN
299 PerlIO_init(aTHX); /* Hook to IO system */
301 PL_fdpid = newAV(); /* for remembering popen pids by fd */
302 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
303 PL_errors = newSVpvs("");
304 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
305 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
306 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
308 /* First entry is a list of empty elements. It needs to be initialised
309 else all hell breaks loose in S_find_uninit_var(). */
310 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
311 PL_regex_pad = AvARRAY(PL_regex_padav);
313 #ifdef USE_REENTRANT_API
314 Perl_reentrant_init(aTHX);
317 /* Note that strtab is a rather special HV. Assumptions are made
318 about not iterating on it, and not adding tie magic to it.
319 It is properly deallocated in perl_destruct() */
322 HvSHAREKEYS_off(PL_strtab); /* mandatory */
323 hv_ksplit(PL_strtab, 512);
325 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
326 _dyld_lookup_and_bind
327 ("__environ", (unsigned long *) &environ_pointer, NULL);
331 # ifdef USE_ENVIRON_ARRAY
332 PL_origenviron = environ;
336 /* Use sysconf(_SC_CLK_TCK) if available, if not
337 * available or if the sysconf() fails, use the HZ.
338 * BeOS has those, but returns the wrong value.
339 * The HZ if not originally defined has been by now
340 * been defined as CLK_TCK, if available. */
341 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
342 PL_clocktick = sysconf(_SC_CLK_TCK);
343 if (PL_clocktick <= 0)
347 PL_stashcache = newHV();
349 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
352 if (!PL_mmap_page_size) {
353 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
355 SETERRNO(0, SS_NORMAL);
357 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
359 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
361 if ((long) PL_mmap_page_size < 0) {
363 SV * const error = ERRSV;
364 SvUPGRADE(error, SVt_PV);
365 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
368 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
372 # ifdef HAS_GETPAGESIZE
373 PL_mmap_page_size = getpagesize();
375 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
376 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
380 if (PL_mmap_page_size <= 0)
381 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
382 (IV) PL_mmap_page_size);
384 #endif /* HAS_MMAP */
386 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
387 PL_timesbase.tms_utime = 0;
388 PL_timesbase.tms_stime = 0;
389 PL_timesbase.tms_cutime = 0;
390 PL_timesbase.tms_cstime = 0;
393 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
395 PL_registered_mros = newHV();
396 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
397 HvMAX(PL_registered_mros) = 0;
403 =for apidoc nothreadhook
405 Stub that provides thread hook for perl_destruct when there are
412 Perl_nothreadhook(pTHX)
418 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
420 Perl_dump_sv_child(pTHX_ SV *sv)
423 const int sock = PL_dumper_fd;
424 const int debug_fd = PerlIO_fileno(Perl_debug_log);
425 union control_un control;
428 struct cmsghdr *cmptr;
430 unsigned char buffer[256];
432 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
434 if(sock == -1 || debug_fd == -1)
437 PerlIO_flush(Perl_debug_log);
439 /* All these shenanigans are to pass a file descriptor over to our child for
440 it to dump out to. We can't let it hold open the file descriptor when it
441 forks, as the file descriptor it will dump to can turn out to be one end
442 of pipe that some other process will wait on for EOF. (So as it would
443 be open, the wait would be forever.) */
445 msg.msg_control = control.control;
446 msg.msg_controllen = sizeof(control.control);
447 /* We're a connected socket so we don't need a destination */
453 cmptr = CMSG_FIRSTHDR(&msg);
454 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
455 cmptr->cmsg_level = SOL_SOCKET;
456 cmptr->cmsg_type = SCM_RIGHTS;
457 *((int *)CMSG_DATA(cmptr)) = 1;
459 vec[0].iov_base = (void*)&sv;
460 vec[0].iov_len = sizeof(sv);
461 got = sendmsg(sock, &msg, 0);
464 perror("Debug leaking scalars parent sendmsg failed");
467 if(got < sizeof(sv)) {
468 perror("Debug leaking scalars parent short sendmsg");
472 /* Return protocol is
474 unsigned char: length of location string (0 for empty)
475 unsigned char*: string (not terminated)
477 vec[0].iov_base = (void*)&returned_errno;
478 vec[0].iov_len = sizeof(returned_errno);
479 vec[1].iov_base = buffer;
482 got = readv(sock, vec, 2);
485 perror("Debug leaking scalars parent read failed");
486 PerlIO_flush(PerlIO_stderr());
489 if(got < sizeof(returned_errno) + 1) {
490 perror("Debug leaking scalars parent short read");
491 PerlIO_flush(PerlIO_stderr());
496 got = read(sock, buffer + 1, *buffer);
498 perror("Debug leaking scalars parent read 2 failed");
499 PerlIO_flush(PerlIO_stderr());
504 perror("Debug leaking scalars parent short read 2");
505 PerlIO_flush(PerlIO_stderr());
510 if (returned_errno || *buffer) {
511 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
512 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
513 returned_errno, strerror(returned_errno));
519 =for apidoc perl_destruct
521 Shuts down a Perl interpreter. See L<perlembed>.
530 VOL signed char destruct_level; /* see possible values in intrpvar.h */
532 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
536 PERL_ARGS_ASSERT_PERL_DESTRUCT;
538 PERL_UNUSED_ARG(my_perl);
541 assert(PL_scopestack_ix == 1);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c)
565 call_list(PL_scopestack_ix, PL_endav);
570 assert(PL_scopestack_ix == 0);
572 /* Need to flush since END blocks can produce output */
575 if (CALL_FPTR(PL_threadhook)(aTHX)) {
576 /* Threads hook has vetoed further cleanup */
577 PL_veto_cleanup = TRUE;
581 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
582 if (destruct_level != 0) {
583 /* Fork here to create a child. Our child's job is to preserve the
584 state of scalars prior to destruction, so that we can instruct it
585 to dump any scalars that we later find have leaked.
586 There's no subtlety in this code - it assumes POSIX, and it doesn't
590 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
591 perror("Debug leaking scalars socketpair failed");
597 perror("Debug leaking scalars fork failed");
601 /* We are the child */
602 const int sock = fd[1];
603 const int debug_fd = PerlIO_fileno(Perl_debug_log);
606 /* Our success message is an integer 0, and a char 0 */
607 static const char success[sizeof(int) + 1] = {0};
611 /* We need to close all other file descriptors otherwise we end up
612 with interesting hangs, where the parent closes its end of a
613 pipe, and sits waiting for (another) child to terminate. Only
614 that child never terminates, because it never gets EOF, because
615 we also have the far end of the pipe open. We even need to
616 close the debugging fd, because sometimes it happens to be one
617 end of a pipe, and a process is waiting on the other end for
618 EOF. Normally it would be closed at some point earlier in
619 destruction, but if we happen to cause the pipe to remain open,
620 EOF never occurs, and we get an infinite hang. Hence all the
621 games to pass in a file descriptor if it's actually needed. */
623 f = sysconf(_SC_OPEN_MAX);
625 where = "sysconf failed";
636 union control_un control;
639 struct cmsghdr *cmptr;
643 msg.msg_control = control.control;
644 msg.msg_controllen = sizeof(control.control);
645 /* We're a connected socket so we don't need a source */
649 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
651 vec[0].iov_base = (void*)⌖
652 vec[0].iov_len = sizeof(target);
654 got = recvmsg(sock, &msg, 0);
659 where = "recv failed";
662 if(got < sizeof(target)) {
663 where = "short recv";
667 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
671 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
672 where = "wrong cmsg_len";
675 if(cmptr->cmsg_level != SOL_SOCKET) {
676 where = "wrong cmsg_level";
679 if(cmptr->cmsg_type != SCM_RIGHTS) {
680 where = "wrong cmsg_type";
684 got_fd = *(int*)CMSG_DATA(cmptr);
685 /* For our last little bit of trickery, put the file descriptor
686 back into Perl_debug_log, as if we never actually closed it
688 if(got_fd != debug_fd) {
689 if (dup2(got_fd, debug_fd) == -1) {
696 PerlIO_flush(Perl_debug_log);
698 got = write(sock, &success, sizeof(success));
701 where = "write failed";
704 if(got < sizeof(success)) {
705 where = "short write";
712 int send_errno = errno;
713 unsigned char length = (unsigned char) strlen(where);
714 struct iovec failure[3] = {
715 {(void*)&send_errno, sizeof(send_errno)},
717 {(void*)where, length}
719 int got = writev(sock, failure, 3);
720 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
721 in the parent if we try to read from the socketpair after the
722 child has exited, even if there was data to read.
723 So sleep a bit to give the parent a fighting chance of
726 _exit((got == -1) ? errno : 0);
730 PL_dumper_fd = fd[0];
735 /* We must account for everything. */
737 /* Destroy the main CV and syntax tree */
738 /* Do this now, because destroying ops can cause new SVs to be generated
739 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
740 PL_curcop to point to a valid op from which the filename structure
742 PL_curcop = &PL_compiling;
744 /* ensure comppad/curpad to refer to main's pad */
745 if (CvPADLIST(PL_main_cv)) {
746 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
748 op_free(PL_main_root);
751 PL_main_start = NULL;
752 SvREFCNT_dec(PL_main_cv);
756 /* Tell PerlIO we are about to tear things apart in case
757 we have layers which are using resources that should
761 PerlIO_destruct(aTHX);
763 if (PL_sv_objcount) {
765 * Try to destruct global references. We do this first so that the
766 * destructors and destructees still exist. Some sv's might remain.
767 * Non-referenced objects are on their own.
771 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
772 PL_defoutgv = NULL; /* may have been freed */
775 /* unhook hooks which will soon be, or use, destroyed data */
776 SvREFCNT_dec(PL_warnhook);
778 SvREFCNT_dec(PL_diehook);
781 /* call exit list functions */
782 while (PL_exitlistlen-- > 0)
783 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
785 Safefree(PL_exitlist);
790 SvREFCNT_dec(PL_registered_mros);
792 /* jettison our possibly duplicated environment */
793 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
794 * so we certainly shouldn't free it here
797 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
798 if (environ != PL_origenviron && !PL_use_safe_putenv
800 /* only main thread can free environ[0] contents */
801 && PL_curinterp == aTHX
807 for (i = 0; environ[i]; i++)
808 safesysfree(environ[i]);
810 /* Must use safesysfree() when working with environ. */
811 safesysfree(environ);
813 environ = PL_origenviron;
816 #endif /* !PERL_MICRO */
818 if (destruct_level == 0) {
820 DEBUG_P(debprofdump());
822 #if defined(PERLIO_LAYERS)
823 /* No more IO - including error messages ! */
824 PerlIO_cleanup(aTHX);
827 CopFILE_free(&PL_compiling);
828 CopSTASH_free(&PL_compiling);
830 /* The exit() function will do everything that needs doing. */
834 /* reset so print() ends up where we expect */
838 /* the syntax tree is shared between clones
839 * so op_free(PL_main_root) only ReREFCNT_dec's
840 * REGEXPs in the parent interpreter
841 * we need to manually ReREFCNT_dec for the clones
843 SvREFCNT_dec(PL_regex_padav);
844 PL_regex_padav = NULL;
848 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
849 PL_stashcache = NULL;
851 /* loosen bonds of global variables */
853 /* XXX can PL_parser still be non-null here? */
854 if(PL_parser && PL_parser->rsfp) {
855 (void)PerlIO_close(PL_parser->rsfp);
856 PL_parser->rsfp = NULL;
860 Safefree(PL_splitstr);
870 PL_doswitches = FALSE;
871 PL_dowarn = G_WARN_OFF;
872 PL_doextract = FALSE;
873 PL_sawampersand = FALSE; /* must save all match strings */
876 Safefree(PL_inplace);
878 SvREFCNT_dec(PL_patchlevel);
881 SvREFCNT_dec(PL_e_script);
887 /* magical thingies */
889 SvREFCNT_dec(PL_ofsgv); /* *, */
892 SvREFCNT_dec(PL_ors_sv); /* $\ */
895 SvREFCNT_dec(PL_rs); /* $/ */
898 Safefree(PL_osname); /* $^O */
901 SvREFCNT_dec(PL_statname);
905 /* defgv, aka *_ should be taken care of elsewhere */
907 /* clean up after study() */
908 SvREFCNT_dec(PL_lastscream);
909 PL_lastscream = NULL;
910 Safefree(PL_screamfirst);
912 Safefree(PL_screamnext);
916 Safefree(PL_efloatbuf);
920 /* startup and shutdown function lists */
921 SvREFCNT_dec(PL_beginav);
922 SvREFCNT_dec(PL_beginav_save);
923 SvREFCNT_dec(PL_endav);
924 SvREFCNT_dec(PL_checkav);
925 SvREFCNT_dec(PL_checkav_save);
926 SvREFCNT_dec(PL_unitcheckav);
927 SvREFCNT_dec(PL_unitcheckav_save);
928 SvREFCNT_dec(PL_initav);
930 PL_beginav_save = NULL;
933 PL_checkav_save = NULL;
934 PL_unitcheckav = NULL;
935 PL_unitcheckav_save = NULL;
938 /* shortcuts just get cleared */
947 PL_last_in_gv = NULL;
959 SvREFCNT_dec(PL_argvout_stack);
960 PL_argvout_stack = NULL;
962 SvREFCNT_dec(PL_modglobal);
964 SvREFCNT_dec(PL_preambleav);
965 PL_preambleav = NULL;
966 SvREFCNT_dec(PL_subname);
968 #ifdef PERL_USES_PL_PIDSTATUS
969 SvREFCNT_dec(PL_pidstatus);
972 SvREFCNT_dec(PL_toptarget);
974 SvREFCNT_dec(PL_bodytarget);
975 PL_bodytarget = NULL;
976 PL_formtarget = NULL;
978 /* free locale stuff */
979 #ifdef USE_LOCALE_COLLATE
980 Safefree(PL_collation_name);
981 PL_collation_name = NULL;
984 #ifdef USE_LOCALE_NUMERIC
985 Safefree(PL_numeric_name);
986 PL_numeric_name = NULL;
987 SvREFCNT_dec(PL_numeric_radix_sv);
988 PL_numeric_radix_sv = NULL;
991 /* clear utf8 character classes */
992 SvREFCNT_dec(PL_utf8_alnum);
993 SvREFCNT_dec(PL_utf8_ascii);
994 SvREFCNT_dec(PL_utf8_alpha);
995 SvREFCNT_dec(PL_utf8_space);
996 SvREFCNT_dec(PL_utf8_cntrl);
997 SvREFCNT_dec(PL_utf8_graph);
998 SvREFCNT_dec(PL_utf8_digit);
999 SvREFCNT_dec(PL_utf8_upper);
1000 SvREFCNT_dec(PL_utf8_lower);
1001 SvREFCNT_dec(PL_utf8_print);
1002 SvREFCNT_dec(PL_utf8_punct);
1003 SvREFCNT_dec(PL_utf8_xdigit);
1004 SvREFCNT_dec(PL_utf8_mark);
1005 SvREFCNT_dec(PL_utf8_toupper);
1006 SvREFCNT_dec(PL_utf8_totitle);
1007 SvREFCNT_dec(PL_utf8_tolower);
1008 SvREFCNT_dec(PL_utf8_tofold);
1009 SvREFCNT_dec(PL_utf8_idstart);
1010 SvREFCNT_dec(PL_utf8_idcont);
1011 PL_utf8_alnum = NULL;
1012 PL_utf8_ascii = NULL;
1013 PL_utf8_alpha = NULL;
1014 PL_utf8_space = NULL;
1015 PL_utf8_cntrl = NULL;
1016 PL_utf8_graph = NULL;
1017 PL_utf8_digit = NULL;
1018 PL_utf8_upper = NULL;
1019 PL_utf8_lower = NULL;
1020 PL_utf8_print = NULL;
1021 PL_utf8_punct = NULL;
1022 PL_utf8_xdigit = NULL;
1023 PL_utf8_mark = NULL;
1024 PL_utf8_toupper = NULL;
1025 PL_utf8_totitle = NULL;
1026 PL_utf8_tolower = NULL;
1027 PL_utf8_tofold = NULL;
1028 PL_utf8_idstart = NULL;
1029 PL_utf8_idcont = NULL;
1031 if (!specialWARN(PL_compiling.cop_warnings))
1032 PerlMemShared_free(PL_compiling.cop_warnings);
1033 PL_compiling.cop_warnings = NULL;
1034 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1035 PL_compiling.cop_hints_hash = NULL;
1036 CopFILE_free(&PL_compiling);
1037 CopSTASH_free(&PL_compiling);
1039 /* Prepare to destruct main symbol table. */
1044 SvREFCNT_dec(PL_curstname);
1045 PL_curstname = NULL;
1047 /* clear queued errors */
1048 SvREFCNT_dec(PL_errors);
1051 SvREFCNT_dec(PL_isarev);
1054 if (destruct_level >= 2) {
1055 if (PL_scopestack_ix != 0)
1056 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1057 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1058 (long)PL_scopestack_ix);
1059 if (PL_savestack_ix != 0)
1060 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1061 "Unbalanced saves: %ld more saves than restores\n",
1062 (long)PL_savestack_ix);
1063 if (PL_tmps_floor != -1)
1064 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1065 (long)PL_tmps_floor + 1);
1066 if (cxstack_ix != -1)
1067 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1068 (long)cxstack_ix + 1);
1071 /* Now absolutely destruct everything, somehow or other, loops or no. */
1073 /* the 2 is for PL_fdpid and PL_strtab */
1074 while (sv_clean_all() > 2)
1077 AvREAL_off(PL_fdpid); /* no surviving entries */
1078 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1081 #ifdef HAVE_INTERP_INTERN
1085 /* Destruct the global string table. */
1087 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1088 * so that sv_free() won't fail on them.
1089 * Now that the global string table is using a single hunk of memory
1090 * for both HE and HEK, we either need to explicitly unshare it the
1091 * correct way, or actually free things here.
1094 const I32 max = HvMAX(PL_strtab);
1095 HE * const * const array = HvARRAY(PL_strtab);
1096 HE *hent = array[0];
1099 if (hent && ckWARN_d(WARN_INTERNAL)) {
1100 HE * const next = HeNEXT(hent);
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1102 "Unbalanced string table refcount: (%ld) for \"%s\"",
1103 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1110 hent = array[riter];
1115 HvARRAY(PL_strtab) = 0;
1116 HvTOTALKEYS(PL_strtab) = 0;
1117 HvFILL(PL_strtab) = 0;
1119 SvREFCNT_dec(PL_strtab);
1122 /* free the pointer tables used for cloning */
1123 ptr_table_free(PL_ptr_table);
1124 PL_ptr_table = (PTR_TBL_t*)NULL;
1127 /* free special SVs */
1129 SvREFCNT(&PL_sv_yes) = 0;
1130 sv_clear(&PL_sv_yes);
1131 SvANY(&PL_sv_yes) = NULL;
1132 SvFLAGS(&PL_sv_yes) = 0;
1134 SvREFCNT(&PL_sv_no) = 0;
1135 sv_clear(&PL_sv_no);
1136 SvANY(&PL_sv_no) = NULL;
1137 SvFLAGS(&PL_sv_no) = 0;
1141 for (i=0; i<=2; i++) {
1142 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1143 sv_clear(PERL_DEBUG_PAD(i));
1144 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1145 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1149 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1150 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1152 #ifdef DEBUG_LEAKING_SCALARS
1153 if (PL_sv_count != 0) {
1158 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1159 svend = &sva[SvREFCNT(sva)];
1160 for (sv = sva + 1; sv < svend; ++sv) {
1161 if (SvTYPE(sv) != SVTYPEMASK) {
1162 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1164 " refcnt=%"UVuf pTHX__FORMAT "\n"
1165 "\tallocated at %s:%d %s %s%s\n",
1166 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1168 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1170 sv->sv_debug_inpad ? "for" : "by",
1171 sv->sv_debug_optype ?
1172 PL_op_name[sv->sv_debug_optype]: "(none)",
1173 sv->sv_debug_cloned ? " (cloned)" : ""
1175 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1176 Perl_dump_sv_child(aTHX_ sv);
1182 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1186 /* Wait for up to 4 seconds for child to terminate.
1187 This seems to be the least effort way of timing out on reaping
1189 struct timeval waitfor = {4, 0};
1190 int sock = PL_dumper_fd;
1194 FD_SET(sock, &rset);
1195 select(sock + 1, &rset, NULL, NULL, &waitfor);
1196 waitpid(child, &status, WNOHANG);
1201 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1207 #ifdef PERL_DEBUG_READONLY_OPS
1213 #if defined(PERLIO_LAYERS)
1214 /* No more IO - including error messages ! */
1215 PerlIO_cleanup(aTHX);
1218 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1219 as currently layers use it rather than NULL as a marker
1220 for no arg - and will try and SvREFCNT_dec it.
1222 SvREFCNT(&PL_sv_undef) = 0;
1223 SvREADONLY_off(&PL_sv_undef);
1225 Safefree(PL_origfilename);
1226 PL_origfilename = NULL;
1227 Safefree(PL_reg_start_tmp);
1228 PL_reg_start_tmp = (char**)NULL;
1229 PL_reg_start_tmpl = 0;
1230 Safefree(PL_reg_curpm);
1231 Safefree(PL_reg_poscache);
1232 free_tied_hv_pool();
1233 Safefree(PL_op_mask);
1234 Safefree(PL_psig_name);
1235 PL_psig_name = (SV**)NULL;
1236 PL_psig_ptr = (SV**)NULL;
1237 Safefree(PL_psig_pend);
1238 PL_psig_pend = (int*)NULL;
1240 /* We need to NULL PL_psig_pend first, so that
1241 signal handlers know not to use it */
1242 int *psig_save = PL_psig_pend;
1243 PL_psig_pend = (int*)NULL;
1244 Safefree(psig_save);
1248 PL_tainting = FALSE;
1249 PL_taint_warn = FALSE;
1250 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1253 DEBUG_P(debprofdump());
1255 #ifdef USE_REENTRANT_API
1256 Perl_reentrant_free(aTHX);
1261 while (PL_regmatch_slab) {
1262 regmatch_slab *s = PL_regmatch_slab;
1263 PL_regmatch_slab = PL_regmatch_slab->next;
1267 /* As the absolutely last thing, free the non-arena SV for mess() */
1270 /* we know that type == SVt_PVMG */
1272 /* it could have accumulated taint magic */
1275 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1276 moremagic = mg->mg_moremagic;
1277 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1279 Safefree(mg->mg_ptr);
1283 /* we know that type >= SVt_PV */
1284 SvPV_free(PL_mess_sv);
1285 Safefree(SvANY(PL_mess_sv));
1286 Safefree(PL_mess_sv);
1293 =for apidoc perl_free
1295 Releases a Perl interpreter. See L<perlembed>.
1305 PERL_ARGS_ASSERT_PERL_FREE;
1307 if (PL_veto_cleanup)
1310 #ifdef PERL_TRACK_MEMPOOL
1313 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1314 * value as we're probably hunting memory leaks then
1316 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1317 if (!s || atoi(s) == 0) {
1318 const U32 old_debug = PL_debug;
1319 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1320 thread at thread exit. */
1322 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1323 "free this thread's memory\n");
1324 PL_debug &= ~ DEBUG_m_FLAG;
1326 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1327 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1328 PL_debug = old_debug;
1333 #if defined(WIN32) || defined(NETWARE)
1334 # if defined(PERL_IMPLICIT_SYS)
1337 void *host = nw_internal_host;
1339 void *host = w32_internal_host;
1341 PerlMem_free(aTHXx);
1343 nw_delete_internal_host(host);
1345 win32_delete_internal_host(host);
1349 PerlMem_free(aTHXx);
1352 PerlMem_free(aTHXx);
1356 #if defined(USE_ITHREADS)
1357 /* provide destructors to clean up the thread key when libperl is unloaded */
1358 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1360 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1361 #pragma fini "perl_fini"
1362 #elif defined(__sun) && !defined(__GNUC__)
1363 #pragma fini (perl_fini)
1367 #if defined(__GNUC__)
1368 __attribute__((destructor))
1373 if (PL_curinterp && !PL_veto_cleanup)
1378 #endif /* THREADS */
1381 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1384 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1385 PL_exitlist[PL_exitlistlen].fn = fn;
1386 PL_exitlist[PL_exitlistlen].ptr = ptr;
1390 #ifdef HAS_PROCSELFEXE
1391 /* This is a function so that we don't hold on to MAXPATHLEN
1392 bytes of stack longer than necessary
1395 S_procself_val(pTHX_ SV *sv, const char *arg0)
1397 char buf[MAXPATHLEN];
1398 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1400 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1401 includes a spurious NUL which will cause $^X to fail in system
1402 or backticks (this will prevent extensions from being built and
1403 many tests from working). readlink is not meant to add a NUL.
1404 Normal readlink works fine.
1406 if (len > 0 && buf[len-1] == '\0') {
1410 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1411 returning the text "unknown" from the readlink rather than the path
1412 to the executable (or returning an error from the readlink). Any valid
1413 path has a '/' in it somewhere, so use that to validate the result.
1414 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1416 if (len > 0 && memchr(buf, '/', len)) {
1417 sv_setpvn(sv,buf,len);
1423 #endif /* HAS_PROCSELFEXE */
1426 S_set_caret_X(pTHX) {
1428 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1430 #ifdef HAS_PROCSELFEXE
1431 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1434 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1436 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1443 =for apidoc perl_parse
1445 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1451 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1458 PERL_ARGS_ASSERT_PERL_PARSE;
1459 #ifndef MULTIPLICITY
1460 PERL_UNUSED_ARG(my_perl);
1463 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1464 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1465 * This MUST be done before any hash stores or fetches take place.
1466 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1467 * yourself, it is your responsibility to provide a good random seed!
1468 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1469 if (!PL_rehash_seed_set)
1470 PL_rehash_seed = get_hash_seed();
1472 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1474 if (s && (atoi(s) == 1))
1475 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1477 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1482 if (PL_origalen != 0) {
1483 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1486 /* Set PL_origalen be the sum of the contiguous argv[]
1487 * elements plus the size of the env in case that it is
1488 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1489 * as the maximum modifiable length of $0. In the worst case
1490 * the area we are able to modify is limited to the size of
1491 * the original argv[0]. (See below for 'contiguous', though.)
1493 const char *s = NULL;
1496 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1497 /* Do the mask check only if the args seem like aligned. */
1499 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1501 /* See if all the arguments are contiguous in memory. Note
1502 * that 'contiguous' is a loose term because some platforms
1503 * align the argv[] and the envp[]. If the arguments look
1504 * like non-aligned, assume that they are 'strictly' or
1505 * 'traditionally' contiguous. If the arguments look like
1506 * aligned, we just check that they are within aligned
1507 * PTRSIZE bytes. As long as no system has something bizarre
1508 * like the argv[] interleaved with some other data, we are
1509 * fine. (Did I just evoke Murphy's Law?) --jhi */
1510 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1512 for (i = 1; i < PL_origargc; i++) {
1513 if ((PL_origargv[i] == s + 1
1515 || PL_origargv[i] == s + 2
1520 (PL_origargv[i] > s &&
1522 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1533 #ifndef PERL_USE_SAFE_PUTENV
1534 /* Can we grab env area too to be used as the area for $0? */
1535 if (s && PL_origenviron && !PL_use_safe_putenv) {
1536 if ((PL_origenviron[0] == s + 1)
1539 (PL_origenviron[0] > s &&
1540 PL_origenviron[0] <=
1541 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1544 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1545 s = PL_origenviron[0];
1548 my_setenv("NoNe SuCh", NULL);
1549 /* Force copy of environment. */
1550 for (i = 1; PL_origenviron[i]; i++) {
1551 if (PL_origenviron[i] == s + 1
1554 (PL_origenviron[i] > s &&
1555 PL_origenviron[i] <=
1556 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1559 s = PL_origenviron[i];
1567 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1569 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1574 /* Come here if running an undumped a.out. */
1576 PL_origfilename = savepv(argv[0]);
1577 PL_do_undump = FALSE;
1578 cxstack_ix = -1; /* start label stack again */
1580 assert (!PL_tainted);
1582 S_set_caret_X(aTHX);
1584 init_postdump_symbols(argc,argv,env);
1589 op_free(PL_main_root);
1590 PL_main_root = NULL;
1592 PL_main_start = NULL;
1593 SvREFCNT_dec(PL_main_cv);
1597 oldscope = PL_scopestack_ix;
1598 PL_dowarn = G_WARN_OFF;
1603 parse_body(env,xsinit);
1605 call_list(oldscope, PL_unitcheckav);
1607 call_list(oldscope, PL_checkav);
1614 /* my_exit() was called */
1615 while (PL_scopestack_ix > oldscope)
1618 PL_curstash = PL_defstash;
1620 call_list(oldscope, PL_unitcheckav);
1622 call_list(oldscope, PL_checkav);
1626 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1634 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1635 miniperl, and we need to see those flags reflected in the values here. */
1637 /* What this returns is subject to change. Use the public interface in Config.
1640 S_Internals_V(pTHX_ CV *cv)
1643 #ifdef LOCAL_PATCH_COUNT
1644 const int local_patch_count = LOCAL_PATCH_COUNT;
1646 const int local_patch_count = 0;
1648 const int entries = 3 + local_patch_count;
1650 static char non_bincompat_options[] =
1657 # ifdef PERL_DISABLE_PMC
1660 # ifdef PERL_DONT_CREATE_GVSV
1661 " PERL_DONT_CREATE_GVSV"
1663 # ifdef PERL_IS_MINIPERL
1666 # ifdef PERL_MALLOC_WRAP
1669 # ifdef PERL_MEM_LOG
1672 # ifdef PERL_MEM_LOG_NOIMPL
1673 " PERL_MEM_LOG_NOIMPL"
1675 # ifdef PERL_USE_DEVEL
1678 # ifdef PERL_USE_SAFE_PUTENV
1679 " PERL_USE_SAFE_PUTENV"
1681 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1682 " USE_ATTRIBUTES_FOR_PERLIO"
1684 # ifdef USE_FAST_STDIO
1687 # ifdef USE_SITECUSTOMIZE
1688 " USE_SITECUSTOMIZE"
1691 PERL_UNUSED_ARG(cv);
1692 PERL_UNUSED_ARG(items);
1694 EXTEND(SP, entries);
1696 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1697 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1698 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1702 PUSHs(Perl_newSVpvn_flags(aTHX_
1703 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1706 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1710 PUSHs(&PL_sv_undef);
1713 for (i = 1; i <= local_patch_count; i++) {
1714 /* This will be an undef, if PL_localpatches[i] is NULL. */
1715 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1721 #define INCPUSH_UNSHIFT 0x01
1722 #define INCPUSH_ADD_OLD_VERS 0x02
1723 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1724 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1725 #define INCPUSH_NOT_BASEDIR 0x10
1726 #define INCPUSH_CAN_RELOCATE 0x20
1727 #define INCPUSH_ADD_SUB_DIRS \
1728 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1731 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1735 int argc = PL_origargc;
1736 char **argv = PL_origargv;
1737 const char *scriptname = NULL;
1738 VOL bool dosearch = FALSE;
1740 const char *cddir = NULL;
1741 #ifdef USE_SITECUSTOMIZE
1742 bool minus_f = FALSE;
1744 SV *linestr_sv = newSV_type(SVt_PVIV);
1745 bool add_read_e_script = FALSE;
1747 SvGROW(linestr_sv, 80);
1748 sv_setpvs(linestr_sv,"");
1754 for (argc--,argv++; argc > 0; argc--,argv++) {
1755 if (argv[0][0] != '-' || !argv[0][1])
1761 #ifndef PERL_STRICT_CR
1785 if ((s = moreswitches(s)))
1790 CHECK_MALLOC_TOO_LATE_FOR('t');
1791 if( !PL_tainting ) {
1792 PL_taint_warn = TRUE;
1798 CHECK_MALLOC_TOO_LATE_FOR('T');
1800 PL_taint_warn = FALSE;
1808 forbid_setid('e', FALSE);
1810 PL_e_script = newSVpvs("");
1811 add_read_e_script = TRUE;
1814 sv_catpv(PL_e_script, s);
1816 sv_catpv(PL_e_script, argv[1]);
1820 Perl_croak(aTHX_ "No code specified for -%c", c);
1821 sv_catpvs(PL_e_script, "\n");
1825 #ifdef USE_SITECUSTOMIZE
1831 case 'I': /* -I handled both here and in moreswitches() */
1832 forbid_setid('I', FALSE);
1833 if (!*++s && (s=argv[1]) != NULL) {
1837 STRLEN len = strlen(s);
1838 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1841 Perl_croak(aTHX_ "No directory specified for -I");
1844 forbid_setid('S', FALSE);
1853 opts_prog = newSVpvs("use Config; Config::_V()");
1857 opts_prog = Perl_newSVpvf(aTHX_
1858 "use Config; Config::config_vars(qw%c%s%c)",
1862 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1863 /* don't look for script or read stdin */
1864 scriptname = BIT_BUCKET;
1868 PL_doextract = TRUE;
1876 if (!*++s || isSPACE(*s)) {
1880 /* catch use of gnu style long options */
1881 if (strEQ(s, "version")) {
1885 if (strEQ(s, "help")) {
1892 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1903 #ifndef SECURE_INTERNAL_GETENV
1906 (s = PerlEnv_getenv("PERL5OPT")))
1910 if (*s == '-' && *(s+1) == 'T') {
1911 CHECK_MALLOC_TOO_LATE_FOR('T');
1913 PL_taint_warn = FALSE;
1916 char *popt_copy = NULL;
1929 if (!strchr("CDIMUdmtwW", *s))
1930 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1934 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1935 s = popt_copy + (s - d);
1943 if( !PL_tainting ) {
1944 PL_taint_warn = TRUE;
1955 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1957 /* SITELIB_EXP is a function call on Win32.
1958 The games with local $! are to avoid setting errno if there is no
1959 sitecustomize script. */
1960 const char *const sitelib = SITELIB_EXP;
1961 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1963 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1968 scriptname = argv[0];
1971 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1973 else if (scriptname == NULL) {
1975 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1981 /* Set $^X early so that it can be used for relocatable paths in @INC */
1982 assert (!PL_tainted);
1984 S_set_caret_X(aTHX);
1989 bool suidscript = FALSE;
1991 open_script(scriptname, dosearch, &suidscript, &rsfp);
1993 validate_suid(validarg, scriptname, fdscript, suidscript,
1997 # if defined(SIGCHLD) || defined(SIGCLD)
2000 # define SIGCHLD SIGCLD
2002 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2003 if (sigstate == (Sighandler_t) SIG_IGN) {
2004 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2005 "Can't ignore signal CHLD, forcing to default");
2006 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2014 /* This will croak if suidscript is true, as -x cannot be used with
2016 forbid_setid('x', suidscript);
2017 /* Hence you can't get here if suidscript is true */
2019 find_beginning(linestr_sv, rsfp);
2020 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2021 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2025 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2026 CvUNIQUE_on(PL_compcv);
2028 CvPADLIST(PL_compcv) = pad_new(0);
2030 PL_isarev = newHV();
2033 boot_core_UNIVERSAL();
2035 newXS("Internals::V", S_Internals_V, __FILE__);
2038 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2040 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2046 # ifdef HAS_SOCKS5_INIT
2047 socks5_init(argv[0]);
2053 init_predump_symbols();
2054 /* init_postdump_symbols not currently designed to be called */
2055 /* more than once (ENV isn't cleared first, for example) */
2056 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2058 init_postdump_symbols(argc,argv,env);
2060 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2061 * or explicitly in some platforms.
2062 * locale.c:Perl_init_i18nl10n() if the environment
2063 * look like the user wants to use UTF-8. */
2064 #if defined(__SYMBIAN32__)
2065 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2067 # ifndef PERL_IS_MINIPERL
2069 /* Requires init_predump_symbols(). */
2070 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2075 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2076 * and the default open disciplines. */
2077 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2078 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2080 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2081 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2082 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2084 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2085 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2086 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2088 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2089 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2090 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2092 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2093 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2096 sv_setpvs(sv, ":utf8\0:utf8");
2098 sv_setpvs(sv, ":utf8\0");
2101 sv_setpvs(sv, "\0:utf8");
2110 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2111 if (strEQ(s, "unsafe"))
2112 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2113 else if (strEQ(s, "safe"))
2114 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2116 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2123 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2127 PL_xmlfp = PerlIO_stdout();
2129 PL_xmlfp = PerlIO_open(s, "w");
2131 Perl_croak(aTHX_ "Can't open %s", s);
2133 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2139 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2140 PL_madskills = atoi(s);
2141 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2146 lex_start(linestr_sv, rsfp, TRUE);
2147 PL_subname = newSVpvs("main");
2149 if (add_read_e_script)
2150 filter_add(read_e_script, NULL);
2152 /* now parse the script */
2154 SETERRNO(0,SS_NORMAL);
2155 if (yyparse() || PL_parser->error_count) {
2157 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2159 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2163 CopLINE_set(PL_curcop, 0);
2164 PL_curstash = PL_defstash;
2166 SvREFCNT_dec(PL_e_script);
2174 SAVECOPFILE(PL_curcop);
2175 SAVECOPLINE(PL_curcop);
2176 gv_check(PL_defstash);
2185 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2186 dump_mstats("after compilation:");
2196 =for apidoc perl_run
2198 Tells a Perl interpreter to run. See L<perlembed>.
2211 PERL_ARGS_ASSERT_PERL_RUN;
2212 #ifndef MULTIPLICITY
2213 PERL_UNUSED_ARG(my_perl);
2216 oldscope = PL_scopestack_ix;
2224 cxstack_ix = -1; /* start context stack again */
2226 case 0: /* normal completion */
2230 case 2: /* my_exit() */
2231 while (PL_scopestack_ix > oldscope)
2234 PL_curstash = PL_defstash;
2235 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2236 PL_endav && !PL_minus_c)
2237 call_list(oldscope, PL_endav);
2239 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2240 dump_mstats("after execution: ");
2246 POPSTACK_TO(PL_mainstack);
2249 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2260 S_run_body(pTHX_ I32 oldscope)
2263 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2264 PL_sawampersand ? "Enabling" : "Omitting"));
2266 if (!PL_restartop) {
2270 exit(0); /* less likely to core dump than my_exit(0) */
2274 if (DEBUG_x_TEST || DEBUG_B_TEST)
2275 dump_all_perl(!DEBUG_B_TEST);
2277 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2281 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2284 if (PERLDB_SINGLE && PL_DBsingle)
2285 sv_setiv(PL_DBsingle, 1);
2287 call_list(oldscope, PL_initav);
2288 #ifdef PERL_DEBUG_READONLY_OPS
2289 Perl_pending_Slabs_to_ro(aTHX);
2296 PL_op = PL_restartop;
2300 else if (PL_main_start) {
2301 CvDEPTH(PL_main_cv) = 1;
2302 PL_op = PL_main_start;
2310 =head1 SV Manipulation Functions
2312 =for apidoc p||get_sv
2314 Returns the SV of the specified Perl scalar. C<flags> are passed to
2315 C<gv_fetchpv>. If C<GV_ADD> is set and the
2316 Perl variable does not exist then it will be created. If C<flags> is zero
2317 and the variable does not exist then NULL is returned.
2323 Perl_get_sv(pTHX_ const char *name, I32 flags)
2327 PERL_ARGS_ASSERT_GET_SV;
2329 gv = gv_fetchpv(name, flags, SVt_PV);
2336 =head1 Array Manipulation Functions
2338 =for apidoc p||get_av
2340 Returns the AV of the specified Perl array. C<flags> are passed to
2341 C<gv_fetchpv>. If C<GV_ADD> is set and the
2342 Perl variable does not exist then it will be created. If C<flags> is zero
2343 and the variable does not exist then NULL is returned.
2349 Perl_get_av(pTHX_ const char *name, I32 flags)
2351 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2353 PERL_ARGS_ASSERT_GET_AV;
2363 =head1 Hash Manipulation Functions
2365 =for apidoc p||get_hv
2367 Returns the HV of the specified Perl hash. C<flags> are passed to
2368 C<gv_fetchpv>. If C<GV_ADD> is set and the
2369 Perl variable does not exist then it will be created. If C<flags> is zero
2370 and the variable does not exist then NULL is returned.
2376 Perl_get_hv(pTHX_ const char *name, I32 flags)
2378 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2380 PERL_ARGS_ASSERT_GET_HV;
2390 =head1 CV Manipulation Functions
2392 =for apidoc p||get_cvn_flags
2394 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2395 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2396 exist then it will be declared (which has the same effect as saying
2397 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2398 then NULL is returned.
2400 =for apidoc p||get_cv
2402 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2408 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2410 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2411 /* XXX this is probably not what they think they're getting.
2412 * It has the same effect as "sub name;", i.e. just a forward
2415 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2417 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2418 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2419 return newSUB(start_subparse(FALSE, 0),
2420 newSVOP(OP_CONST, 0, sv),
2428 /* Nothing in core calls this now, but we can't replace it with a macro and
2429 move it to mathoms.c as a macro would evaluate name twice. */
2431 Perl_get_cv(pTHX_ const char *name, I32 flags)
2433 PERL_ARGS_ASSERT_GET_CV;
2435 return get_cvn_flags(name, strlen(name), flags);
2438 /* Be sure to refetch the stack pointer after calling these routines. */
2442 =head1 Callback Functions
2444 =for apidoc p||call_argv
2446 Performs a callback to the specified Perl sub. See L<perlcall>.
2452 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2454 /* See G_* flags in cop.h */
2455 /* null terminated arg list */
2460 PERL_ARGS_ASSERT_CALL_ARGV;
2465 mXPUSHs(newSVpv(*argv,0));
2470 return call_pv(sub_name, flags);
2474 =for apidoc p||call_pv
2476 Performs a callback to the specified Perl sub. See L<perlcall>.
2482 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2483 /* name of the subroutine */
2484 /* See G_* flags in cop.h */
2486 PERL_ARGS_ASSERT_CALL_PV;
2488 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2492 =for apidoc p||call_method
2494 Performs a callback to the specified Perl method. The blessed object must
2495 be on the stack. See L<perlcall>.
2501 Perl_call_method(pTHX_ const char *methname, I32 flags)
2502 /* name of the subroutine */
2503 /* See G_* flags in cop.h */
2506 PERL_ARGS_ASSERT_CALL_METHOD;
2508 len = strlen(methname);
2510 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2511 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2514 /* May be called with any of a CV, a GV, or an SV containing the name. */
2516 =for apidoc p||call_sv
2518 Performs a callback to the Perl sub whose name is in the SV. See
2525 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2526 /* See G_* flags in cop.h */
2529 LOGOP myop; /* fake syntax tree node */
2534 bool oldcatch = CATCH_GET;
2536 OP* const oldop = PL_op;
2539 PERL_ARGS_ASSERT_CALL_SV;
2541 if (flags & G_DISCARD) {
2545 if (!(flags & G_WANT)) {
2546 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2551 Zero(&myop, 1, LOGOP);
2552 myop.op_next = NULL;
2553 if (!(flags & G_NOARGS))
2554 myop.op_flags |= OPf_STACKED;
2555 myop.op_flags |= OP_GIMME_REVERSE(flags);
2559 EXTEND(PL_stack_sp, 1);
2560 *++PL_stack_sp = sv;
2562 oldscope = PL_scopestack_ix;
2564 if (PERLDB_SUB && PL_curstash != PL_debstash
2565 /* Handle first BEGIN of -d. */
2566 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2567 /* Try harder, since this may have been a sighandler, thus
2568 * curstash may be meaningless. */
2569 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2570 && !(flags & G_NODEBUG))
2571 PL_op->op_private |= OPpENTERSUB_DB;
2573 if (flags & G_METHOD) {
2574 Zero(&method_op, 1, UNOP);
2575 method_op.op_next = PL_op;
2576 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2577 method_op.op_type = OP_METHOD;
2578 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2579 myop.op_type = OP_ENTERSUB;
2580 PL_op = (OP*)&method_op;
2583 if (!(flags & G_EVAL)) {
2585 CALL_BODY_SUB((OP*)&myop);
2586 retval = PL_stack_sp - (PL_stack_base + oldmark);
2587 CATCH_SET(oldcatch);
2590 myop.op_other = (OP*)&myop;
2592 create_eval_scope(flags|G_FAKINGEVAL);
2600 CALL_BODY_SUB((OP*)&myop);
2601 retval = PL_stack_sp - (PL_stack_base + oldmark);
2602 if (!(flags & G_KEEPERR)) {
2610 /* my_exit() was called */
2611 PL_curstash = PL_defstash;
2618 PL_op = PL_restartop;
2622 PL_stack_sp = PL_stack_base + oldmark;
2623 if ((flags & G_WANT) == G_ARRAY)
2627 *++PL_stack_sp = &PL_sv_undef;
2632 if (PL_scopestack_ix > oldscope)
2633 delete_eval_scope();
2637 if (flags & G_DISCARD) {
2638 PL_stack_sp = PL_stack_base + oldmark;
2647 /* Eval a string. The G_EVAL flag is always assumed. */
2650 =for apidoc p||eval_sv
2652 Tells Perl to C<eval> the string in the SV.
2658 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2660 /* See G_* flags in cop.h */
2664 UNOP myop; /* fake syntax tree node */
2665 VOL I32 oldmark = SP - PL_stack_base;
2668 OP* const oldop = PL_op;
2671 PERL_ARGS_ASSERT_EVAL_SV;
2673 if (flags & G_DISCARD) {
2680 Zero(PL_op, 1, UNOP);
2681 EXTEND(PL_stack_sp, 1);
2682 *++PL_stack_sp = sv;
2684 if (!(flags & G_NOARGS))
2685 myop.op_flags = OPf_STACKED;
2686 myop.op_next = NULL;
2687 myop.op_type = OP_ENTEREVAL;
2688 myop.op_flags |= OP_GIMME_REVERSE(flags);
2689 if (flags & G_KEEPERR)
2690 myop.op_flags |= OPf_SPECIAL;
2692 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2693 * before a PUSHEVAL, which corrupts the stack after a croak */
2694 TAINT_PROPER("eval_sv()");
2700 CALL_BODY_EVAL((OP*)&myop);
2701 retval = PL_stack_sp - (PL_stack_base + oldmark);
2702 if (!(flags & G_KEEPERR)) {
2710 /* my_exit() was called */
2711 PL_curstash = PL_defstash;
2718 PL_op = PL_restartop;
2722 PL_stack_sp = PL_stack_base + oldmark;
2723 if ((flags & G_WANT) == G_ARRAY)
2727 *++PL_stack_sp = &PL_sv_undef;
2733 if (flags & G_DISCARD) {
2734 PL_stack_sp = PL_stack_base + oldmark;
2744 =for apidoc p||eval_pv
2746 Tells Perl to C<eval> the given string and return an SV* result.
2752 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2756 SV* sv = newSVpv(p, 0);
2758 PERL_ARGS_ASSERT_EVAL_PV;
2760 eval_sv(sv, G_SCALAR);
2767 if (croak_on_error && SvTRUE(ERRSV)) {
2768 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2774 /* Require a module. */
2777 =head1 Embedding Functions
2779 =for apidoc p||require_pv
2781 Tells Perl to C<require> the file named by the string argument. It is
2782 analogous to the Perl code C<eval "require '$file'">. It's even
2783 implemented that way; consider using load_module instead.
2788 Perl_require_pv(pTHX_ const char *pv)
2794 PERL_ARGS_ASSERT_REQUIRE_PV;
2796 PUSHSTACKi(PERLSI_REQUIRE);
2798 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2799 eval_sv(sv_2mortal(sv), G_DISCARD);
2805 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2807 /* This message really ought to be max 23 lines.
2808 * Removed -h because the user already knows that option. Others? */
2810 static const char * const usage_msg[] = {
2811 "-0[octal] specify record separator (\\0, if no argument)",
2812 "-a autosplit mode with -n or -p (splits $_ into @F)",
2813 "-C[number/list] enables the listed Unicode features",
2814 "-c check syntax only (runs BEGIN and CHECK blocks)",
2815 "-d[:debugger] run program under debugger",
2816 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2817 "-e program one line of program (several -e's allowed, omit programfile)",
2818 "-E program like -e, but enables all optional features",
2819 "-f don't do $sitelib/sitecustomize.pl at startup",
2820 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2821 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2822 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2823 "-l[octal] enable line ending processing, specifies line terminator",
2824 "-[mM][-]module execute \"use/no module...\" before executing program",
2825 "-n assume \"while (<>) { ... }\" loop around program",
2826 "-p assume loop like -n but print line also, like sed",
2827 "-s enable rudimentary parsing for switches after programfile",
2828 "-S look for programfile using PATH environment variable",
2829 "-t enable tainting warnings",
2830 "-T enable tainting checks",
2831 "-u dump core after parsing program",
2832 "-U allow unsafe operations",
2833 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2834 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2835 "-w enable many useful warnings (RECOMMENDED)",
2836 "-W enable all warnings",
2837 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2838 "-X disable all warnings",
2842 const char * const *p = usage_msg;
2844 PERL_ARGS_ASSERT_USAGE;
2846 PerlIO_printf(PerlIO_stdout(),
2847 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2850 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2853 /* convert a string of -D options (or digits) into an int.
2854 * sets *s to point to the char after the options */
2858 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2860 static const char * const usage_msgd[] = {
2861 " Debugging flag values: (see also -d)",
2862 " p Tokenizing and parsing (with v, displays parse stack)",
2863 " s Stack snapshots (with v, displays all stacks)",
2864 " l Context (loop) stack processing",
2865 " t Trace execution",
2866 " o Method and overloading resolution",
2867 " c String/numeric conversions",
2868 " P Print profiling info, source file input state",
2869 " m Memory and SV allocation",
2870 " f Format processing",
2871 " r Regular expression parsing and execution",
2872 " x Syntax tree dump",
2873 " u Tainting checks",
2874 " H Hash dump -- usurps values()",
2875 " X Scratchpad allocation",
2878 " R Include reference counts of dumped variables (eg when using -Ds)",
2879 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2880 " v Verbose: use in conjunction with other flags",
2882 " A Consistency checks on internal structures",
2883 " q quiet - currently only suppresses the 'EXECUTING' message",
2884 " M trace smart match resolution",
2885 " B dump suBroutine definitions, including special Blocks like BEGIN",
2890 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2893 /* if adding extra options, remember to update DEBUG_MASK */
2894 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2896 for (; isALNUM(**s); (*s)++) {
2897 const char * const d = strchr(debopts,**s);
2899 i |= 1 << (d - debopts);
2900 else if (ckWARN_d(WARN_DEBUGGING))
2901 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2902 "invalid option -D%c, use -D'' to see choices\n", **s);
2905 else if (isDIGIT(**s)) {
2907 for (; isALNUM(**s); (*s)++) ;
2909 else if (givehelp) {
2910 const char *const *p = usage_msgd;
2911 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2914 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2915 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2916 "-Dp not implemented on this platform\n");
2922 /* This routine handles any switches that can be given during run */
2925 Perl_moreswitches(pTHX_ const char *s)
2929 const char option = *s; /* used to remember option in -m/-M code */
2931 PERL_ARGS_ASSERT_MORESWITCHES;
2939 SvREFCNT_dec(PL_rs);
2940 if (s[1] == 'x' && s[2]) {
2941 const char *e = s+=2;
2947 flags = PERL_SCAN_SILENT_ILLDIGIT;
2948 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2949 if (s + numlen < e) {
2950 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2954 PL_rs = newSVpvs("");
2955 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2956 tmps = (U8*)SvPVX(PL_rs);
2957 uvchr_to_utf8(tmps, rschar);
2958 SvCUR_set(PL_rs, UNISKIP(rschar));
2963 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2964 if (rschar & ~((U8)~0))
2965 PL_rs = &PL_sv_undef;
2966 else if (!rschar && numlen >= 2)
2967 PL_rs = newSVpvs("");
2969 char ch = (char)rschar;
2970 PL_rs = newSVpvn(&ch, 1);
2973 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2978 PL_unicode = parse_unicode_opts( (const char **)&s );
2979 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2985 while (*s && !isSPACE(*s)) ++s;
2986 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2997 forbid_setid('d', FALSE);
3000 /* -dt indicates to the debugger that threads will be used */
3001 if (*s == 't' && !isALNUM(s[1])) {
3003 my_setenv("PERL5DB_THREADED", "1");
3006 /* The following permits -d:Mod to accepts arguments following an =
3007 in the fashion that -MSome::Mod does. */
3008 if (*s == ':' || *s == '=') {
3009 const char *start = ++s;
3010 const char *const end = s + strlen(s);
3011 SV * const sv = newSVpvs("use Devel::");
3013 /* We now allow -d:Module=Foo,Bar */
3014 while(isALNUM(*s) || *s==':') ++s;
3016 sv_catpvn(sv, start, end - start);
3018 sv_catpvn(sv, start, s-start);
3019 /* Don't use NUL as q// delimiter here, this string goes in the
3021 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3024 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3028 PL_perldb = PERLDB_ALL;
3035 forbid_setid('D', FALSE);
3037 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3038 #else /* !DEBUGGING */
3039 if (ckWARN_d(WARN_DEBUGGING))
3040 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3041 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3042 for (s++; isALNUM(*s); s++) ;
3047 usage(PL_origargv[0]);
3050 Safefree(PL_inplace);
3051 #if defined(__CYGWIN__) /* do backup extension automagically */
3052 if (*(s+1) == '\0') {
3053 PL_inplace = savepvs(".bak");
3056 #endif /* __CYGWIN__ */
3058 const char * const start = ++s;
3059 while (*s && !isSPACE(*s))
3062 PL_inplace = savepvn(start, s - start);
3066 if (*s == '-') /* Additional switches on #! line. */
3070 case 'I': /* -I handled both here and in parse_body() */
3071 forbid_setid('I', FALSE);
3073 while (*s && isSPACE(*s))
3078 /* ignore trailing spaces (possibly followed by other switches) */
3080 for (e = p; *e && !isSPACE(*e); e++) ;
3084 } while (*p && *p != '-');
3086 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3092 Perl_croak(aTHX_ "No directory specified for -I");
3098 SvREFCNT_dec(PL_ors_sv);
3104 PL_ors_sv = newSVpvs("\n");
3105 numlen = 3 + (*s == '0');
3106 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3110 if (RsPARA(PL_rs)) {
3111 PL_ors_sv = newSVpvs("\n\n");
3114 PL_ors_sv = newSVsv(PL_rs);
3119 forbid_setid('M', FALSE); /* XXX ? */
3122 forbid_setid('m', FALSE); /* XXX ? */
3127 const char *use = "use ";
3129 /* -M-foo == 'no foo' */
3130 /* Leading space on " no " is deliberate, to make both
3131 possibilities the same length. */
3132 if (*s == '-') { use = " no "; ++s; }
3133 sv = newSVpvn(use,4);
3135 /* We allow -M'Module qw(Foo Bar)' */
3136 while(isALNUM(*s) || *s==':') {
3145 Perl_croak(aTHX_ "Module name required with -%c option",
3148 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3149 "contains single ':'",
3150 (int)(s - start), start, option);
3151 end = s + strlen(s);
3153 sv_catpvn(sv, start, end - start);
3154 if (option == 'm') {
3156 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3157 sv_catpvs( sv, " ()");
3160 sv_catpvn(sv, start, s-start);
3161 /* Use NUL as q''-delimiter. */
3162 sv_catpvs(sv, " split(/,/,q\0");
3164 sv_catpvn(sv, s, end - s);
3165 sv_catpvs(sv, "\0)");
3168 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3171 Perl_croak(aTHX_ "Missing argument to -%c", option);
3182 forbid_setid('s', FALSE);
3183 PL_doswitches = TRUE;
3197 PL_do_undump = TRUE;
3205 if (!sv_derived_from(PL_patchlevel, "version"))
3206 upg_version(PL_patchlevel, TRUE);
3209 SV* level= vstringify(PL_patchlevel);
3210 #ifdef PERL_PATCHNUM
3211 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3212 SV *num = newSVpvs(PERL_PATCHNUM "*");
3214 SV *num = newSVpvs(PERL_PATCHNUM);
3217 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3218 SvREFCNT_dec(level);
3221 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3225 PerlIO_printf(PerlIO_stdout(),
3226 "\nThis is perl " STRINGIFY(PERL_REVISION)
3227 ", version " STRINGIFY(PERL_VERSION)
3228 ", subversion " STRINGIFY(PERL_SUBVERSION)
3229 " (%"SVf") built for " ARCHNAME, level
3231 SvREFCNT_dec(level);
3234 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3235 PerlIO_printf(PerlIO_stdout(),
3236 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3237 SVfARG(vstringify(PL_patchlevel))));
3238 PerlIO_printf(PerlIO_stdout(),
3239 Perl_form(aTHX_ " built under %s at %s %s\n",
3240 OSNAME, __DATE__, __TIME__));
3241 PerlIO_printf(PerlIO_stdout(),
3242 Perl_form(aTHX_ " OS Specific Release: %s\n",
3245 #if defined(LOCAL_PATCH_COUNT)
3246 if (LOCAL_PATCH_COUNT > 0)
3247 PerlIO_printf(PerlIO_stdout(),
3248 "\n(with %d registered patch%s, "
3249 "see perl -V for more detail)",
3251 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "\n\nCopyright 1987-2009, Larry Wall\n");
3257 PerlIO_printf(PerlIO_stdout(),
3258 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3261 PerlIO_printf(PerlIO_stdout(),
3262 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3263 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3268 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "atariST series port, ++jrb bammi@cadence.com\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "EPOC port by Olaf Flebbe, 1999-2002\n");
3303 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3304 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3307 #ifdef __SYMBIAN32__
3308 PerlIO_printf(PerlIO_stdout(),
3309 "Symbian port by Nokia, 2004-2005\n");
3311 #ifdef BINARY_BUILD_NOTICE
3312 BINARY_BUILD_NOTICE;
3314 PerlIO_printf(PerlIO_stdout(),
3316 Perl may be copied only under the terms of either the Artistic License or the\n\
3317 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3318 Complete documentation for Perl, including FAQ lists, should be found on\n\
3319 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3320 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3323 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3324 PL_dowarn |= G_WARN_ON;
3329 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3330 if (!specialWARN(PL_compiling.cop_warnings))
3331 PerlMemShared_free(PL_compiling.cop_warnings);
3332 PL_compiling.cop_warnings = pWARN_ALL ;
3336 PL_dowarn = G_WARN_ALL_OFF;
3337 if (!specialWARN(PL_compiling.cop_warnings))
3338 PerlMemShared_free(PL_compiling.cop_warnings);
3339 PL_compiling.cop_warnings = pWARN_NONE ;
3346 if (s[0] == '-') /* Additional switches on #! line. */
3351 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3357 #ifdef ALTERNATE_SHEBANG
3358 case 'S': /* OS/2 needs -S on "extproc" line. */
3362 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3367 /* compliments of Tom Christiansen */
3369 /* unexec() can be found in the Gnu emacs distribution */
3370 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3373 Perl_my_unexec(pTHX)
3375 PERL_UNUSED_CONTEXT;
3377 SV * prog = newSVpv(BIN_EXP, 0);
3378 SV * file = newSVpv(PL_origfilename, 0);
3382 sv_catpvs(prog, "/perl");
3383 sv_catpvs(file, ".perldump");
3385 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3386 /* unexec prints msg to stderr in case of failure */
3387 PerlProc_exit(status);
3390 # include <lib$routines.h>
3391 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3392 # elif defined(WIN32) || defined(__CYGWIN__)
3393 Perl_croak(aTHX_ "dump is not supported");
3395 ABORT(); /* for use with undump */
3400 /* initialize curinterp */
3406 # define PERLVAR(var,type)
3407 # define PERLVARA(var,n,type)
3408 # if defined(PERL_IMPLICIT_CONTEXT)
3409 # define PERLVARI(var,type,init) aTHX->var = init;
3410 # define PERLVARIC(var,type,init) aTHX->var = init;
3412 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3413 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3415 # include "intrpvar.h"
3421 # define PERLVAR(var,type)
3422 # define PERLVARA(var,n,type)
3423 # define PERLVARI(var,type,init) PL_##var = init;
3424 # define PERLVARIC(var,type,init) PL_##var = init;
3425 # include "intrpvar.h"
3432 /* As these are inside a structure, PERLVARI isn't capable of initialising
3434 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3435 PL_reg_poscache = PL_reg_starttry = NULL;
3439 S_init_main_stash(pTHX)
3444 PL_curstash = PL_defstash = newHV();
3445 /* We know that the string "main" will be in the global shared string
3446 table, so it's a small saving to use it rather than allocate another
3448 PL_curstname = newSVpvs_share("main");
3449 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3450 /* If we hadn't caused another reference to "main" to be in the shared
3451 string table above, then it would be worth reordering these two,
3452 because otherwise all we do is delete "main" from it as a consequence
3453 of the SvREFCNT_dec, only to add it again with hv_name_set */
3454 SvREFCNT_dec(GvHV(gv));
3455 hv_name_set(PL_defstash, "main", 4, 0);
3456 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3458 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3460 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3461 GvMULTI_on(PL_incgv);
3462 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3463 GvMULTI_on(PL_hintgv);
3464 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3465 SvREFCNT_inc_simple_void(PL_defgv);
3466 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3467 SvREFCNT_inc_simple_void(PL_errgv);
3468 GvMULTI_on(PL_errgv);
3469 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3470 GvMULTI_on(PL_replgv);
3471 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3472 #ifdef PERL_DONT_CREATE_GVSV
3475 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3477 PL_curstash = PL_defstash;
3478 CopSTASH_set(&PL_compiling, PL_defstash);
3479 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3480 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3482 /* We must init $/ before switches are processed. */
3483 sv_setpvs(get_sv("/", GV_ADD), "\n");
3487 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3488 bool *suidscript, PerlIO **rsfpp)
3493 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3496 PL_origfilename = savepvs("-e");
3499 /* if find_script() returns, it returns a malloc()-ed value */
3500 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3502 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3503 const char *s = scriptname + 8;
3509 * Tell apart "normal" usage of fdscript, e.g.
3510 * with bash on FreeBSD:
3511 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3512 * from usage in suidperl.
3513 * Does any "normal" usage leave garbage after the number???
3514 * Is it a mistake to use a similar /dev/fd/ construct for
3519 * Be supersafe and do some sanity-checks.
3520 * Still, can we be sure we got the right thing?
3523 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3526 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3528 scriptname = savepv(s + 1);
3529 Safefree(PL_origfilename);
3530 PL_origfilename = (char *)scriptname;
3535 CopFILE_free(PL_curcop);
3536 CopFILE_set(PL_curcop, PL_origfilename);
3537 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3538 scriptname = (char *)"";
3539 if (fdscript >= 0) {
3540 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3541 # if defined(HAS_FCNTL) && defined(F_SETFD)
3543 /* ensure close-on-exec */
3544 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3547 else if (!*scriptname) {
3548 forbid_setid(0, *suidscript);
3549 *rsfpp = PerlIO_stdin();
3552 #ifdef FAKE_BIT_BUCKET
3553 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3554 * is called) and still have the "-e" work. (Believe it or not,
3555 * a /dev/null is required for the "-e" to work because source
3556 * filter magic is used to implement it. ) This is *not* a general
3557 * replacement for a /dev/null. What we do here is create a temp
3558 * file (an empty file), open up that as the script, and then
3559 * immediately close and unlink it. Close enough for jazz. */
3560 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3561 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3562 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3563 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3564 FAKE_BIT_BUCKET_TEMPLATE
3566 const char * const err = "Failed to create a fake bit bucket";
3567 if (strEQ(scriptname, BIT_BUCKET)) {
3568 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3569 int tmpfd = mkstemp(tmpname);
3571 scriptname = tmpname;
3574 Perl_croak(aTHX_ err);
3577 scriptname = mktemp(tmpname);
3579 Perl_croak(aTHX_ err);
3584 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3585 #ifdef FAKE_BIT_BUCKET
3586 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3587 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3588 && strlen(scriptname) == sizeof(tmpname) - 1) {
3591 scriptname = BIT_BUCKET;
3593 # if defined(HAS_FCNTL) && defined(F_SETFD)
3595 /* ensure close-on-exec */
3596 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3600 /* PSz 16 Sep 03 Keep neat error message */
3602 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3604 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3605 CopFILE(PL_curcop), Strerror(errno));
3611 * I_SYSSTATVFS HAS_FSTATVFS
3613 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3614 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3615 * here so that metaconfig picks them up. */
3618 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3619 /* Don't even need this function. */
3622 S_validate_suid(pTHX_ PerlIO *rsfp)
3624 PERL_ARGS_ASSERT_VALIDATE_SUID;
3626 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3629 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3630 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3632 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3635 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3636 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3637 /* not set-id, must be wrapped */
3640 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3643 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3647 register const char *s2;
3649 PERL_ARGS_ASSERT_FIND_BEGINNING;
3651 /* skip forward in input to the real script? */
3653 while (PL_doextract) {
3654 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3655 Perl_croak(aTHX_ "No Perl script found in input\n");
3657 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3658 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3659 PL_doextract = FALSE;
3660 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3662 while (*s == ' ' || *s == '\t') s++;
3664 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3665 || s2[-1] == '_') s2--;
3666 if (strnEQ(s2-4,"perl",4))
3667 while ((s = moreswitches(s)))
3679 PL_uid = PerlProc_getuid();
3680 PL_euid = PerlProc_geteuid();
3681 PL_gid = PerlProc_getgid();
3682 PL_egid = PerlProc_getegid();
3684 PL_uid |= PL_gid << 16;
3685 PL_euid |= PL_egid << 16;
3687 /* Should not happen: */
3688 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3689 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3692 * Should go by suidscript, not uid!=euid: why disallow
3693 * system("ls") in scripts run from setuid things?
3694 * Or, is this run before we check arguments and set suidscript?
3695 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3696 * (We never have suidscript, can we be sure to have fdscript?)
3697 * Or must then go by UID checks? See comments in forbid_setid also.
3701 /* This is used very early in the lifetime of the program,
3702 * before even the options are parsed, so PL_tainting has
3703 * not been initialized properly. */
3705 Perl_doing_taint(int argc, char *argv[], char *envp[])
3707 #ifndef PERL_IMPLICIT_SYS
3708 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3709 * before we have an interpreter-- and the whole point of this
3710 * function is to be called at such an early stage. If you are on
3711 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3712 * "tainted because running with altered effective ids', you'll
3713 * have to add your own checks somewhere in here. The two most
3714 * known samples of 'implicitness' are Win32 and NetWare, neither
3715 * of which has much of concept of 'uids'. */
3716 int uid = PerlProc_getuid();
3717 int euid = PerlProc_geteuid();
3718 int gid = PerlProc_getgid();
3719 int egid = PerlProc_getegid();
3726 if (uid && (euid != uid || egid != gid))
3728 #endif /* !PERL_IMPLICIT_SYS */
3729 /* This is a really primitive check; environment gets ignored only
3730 * if -T are the first chars together; otherwise one gets
3731 * "Too late" message. */
3732 if ( argc > 1 && argv[1][0] == '-'
3733 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3738 /* Passing the flag as a single char rather than a string is a slight space
3739 optimisation. The only message that isn't /^-.$/ is
3740 "program input from stdin", which is substituted in place of '\0', which
3741 could never be a command line flag. */
3743 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3746 char string[3] = "-x";
3747 const char *message = "program input from stdin";
3754 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3755 if (PL_euid != PL_uid)
3756 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3757 if (PL_egid != PL_gid)
3758 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3759 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3761 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3765 Perl_init_debugger(pTHX)
3768 HV * const ostash = PL_curstash;
3770 PL_curstash = PL_debstash;
3771 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3773 AvREAL_off(PL_dbargs);
3774 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3775 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3776 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3777 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3778 sv_setiv(PL_DBsingle, 0);
3779 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3780 sv_setiv(PL_DBtrace, 0);
3781 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3782 sv_setiv(PL_DBsignal, 0);
3783 PL_curstash = ostash;
3786 #ifndef STRESS_REALLOC
3787 #define REASONABLE(size) (size)
3789 #define REASONABLE(size) (1) /* unreasonable */
3793 Perl_init_stacks(pTHX)
3796 /* start with 128-item stack and 8K cxstack */
3797 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3798 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3799 PL_curstackinfo->si_type = PERLSI_MAIN;
3800 PL_curstack = PL_curstackinfo->si_stack;
3801 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3803 PL_stack_base = AvARRAY(PL_curstack);
3804 PL_stack_sp = PL_stack_base;
3805 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3807 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3810 PL_tmps_max = REASONABLE(128);
3812 Newx(PL_markstack,REASONABLE(32),I32);
3813 PL_markstack_ptr = PL_markstack;
3814 PL_markstack_max = PL_markstack + REASONABLE(32);
3818 Newx(PL_scopestack,REASONABLE(32),I32);
3820 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3822 PL_scopestack_ix = 0;
3823 PL_scopestack_max = REASONABLE(32);
3825 Newx(PL_savestack,REASONABLE(128),ANY);
3826 PL_savestack_ix = 0;
3827 PL_savestack_max = REASONABLE(128);
3836 while (PL_curstackinfo->si_next)
3837 PL_curstackinfo = PL_curstackinfo->si_next;
3838 while (PL_curstackinfo) {
3839 PERL_SI *p = PL_curstackinfo->si_prev;
3840 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3841 Safefree(PL_curstackinfo->si_cxstack);
3842 Safefree(PL_curstackinfo);
3843 PL_curstackinfo = p;
3845 Safefree(PL_tmps_stack);
3846 Safefree(PL_markstack);
3847 Safefree(PL_scopestack);
3849 Safefree(PL_scopestack_name);
3851 Safefree(PL_savestack);
3856 S_init_predump_symbols(pTHX)
3862 sv_setpvs(get_sv("\"", GV_ADD), " ");
3863 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3865 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3866 GvMULTI_on(PL_stdingv);
3867 io = GvIOp(PL_stdingv);
3868 IoTYPE(io) = IoTYPE_RDONLY;
3869 IoIFP(io) = PerlIO_stdin();
3870 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3872 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3874 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3877 IoTYPE(io) = IoTYPE_WRONLY;
3878 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3880 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3882 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3884 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3885 GvMULTI_on(PL_stderrgv);
3886 io = GvIOp(PL_stderrgv);
3887 IoTYPE(io) = IoTYPE_WRONLY;
3888 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3889 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3891 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3893 PL_statname = newSV(0); /* last filename we did stat on */
3897 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3901 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3903 argc--,argv++; /* skip name of script */
3904 if (PL_doswitches) {
3905 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3909 if (argv[0][1] == '-' && !argv[0][2]) {
3913 if ((s = strchr(argv[0], '='))) {
3914 const char *const start_name = argv[0] + 1;
3915 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3916 TRUE, SVt_PV)), s + 1);
3919 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3922 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3923 GvMULTI_on(PL_argvgv);
3924 (void)gv_AVadd(PL_argvgv);
3925 av_clear(GvAVn(PL_argvgv));
3926 for (; argc > 0; argc--,argv++) {
3927 SV * const sv = newSVpv(argv[0],0);
3928 av_push(GvAVn(PL_argvgv),sv);
3929 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3930 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3933 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3934 (void)sv_utf8_decode(sv);
3940 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3945 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3947 PL_toptarget = newSV_type(SVt_PVFM);
3948 sv_setpvs(PL_toptarget, "");
3949 PL_bodytarget = newSV_type(SVt_PVFM);
3950 sv_setpvs(PL_bodytarget, "");
3951 PL_formtarget = PL_bodytarget;
3955 init_argv_symbols(argc,argv);
3957 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3958 sv_setpv(GvSV(tmpgv),PL_origfilename);
3960 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3962 bool env_is_not_environ;
3963 GvMULTI_on(PL_envgv);
3964 hv = GvHVn(PL_envgv);
3965 hv_magic(hv, NULL, PERL_MAGIC_env);
3967 #ifdef USE_ENVIRON_ARRAY
3968 /* Note that if the supplied env parameter is actually a copy
3969 of the global environ then it may now point to free'd memory
3970 if the environment has been modified since. To avoid this
3971 problem we treat env==NULL as meaning 'use the default'
3975 env_is_not_environ = env != environ;
3976 if (env_is_not_environ
3977 # ifdef USE_ITHREADS
3978 && PL_curinterp == aTHX
3987 for (; *env; env++) {
3990 if (!(s = strchr(old_var,'=')) || s == old_var)
3993 #if defined(MSDOS) && !defined(DJGPP)
3995 (void)strupr(old_var);
3998 sv = newSVpv(s+1, 0);
3999 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4000 if (env_is_not_environ)
4004 #endif /* USE_ENVIRON_ARRAY */
4005 #endif /* !PERL_MICRO */
4008 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4009 SvREADONLY_off(GvSV(tmpgv));
4010 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4011 SvREADONLY_on(GvSV(tmpgv));
4013 #ifdef THREADS_HAVE_PIDS
4014 PL_ppid = (IV)getppid();
4017 /* touch @F array to prevent spurious warnings 20020415 MJD */
4019 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4024 S_init_perllib(pTHX)
4028 const char *perl5lib = NULL;
4031 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4037 perl5lib = PerlEnv_getenv("PERL5LIB");
4039 * It isn't possible to delete an environment variable with
4040 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4041 * case we treat PERL5LIB as undefined if it has a zero-length value.
4043 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4044 if (perl5lib && *perl5lib != '\0')
4048 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4050 s = PerlEnv_getenv("PERLLIB");
4052 incpush_use_sep(s, 0, 0);
4055 /* Treat PERL5?LIB as a possible search list logical name -- the
4056 * "natural" VMS idiom for a Unix path string. We allow each
4057 * element to be a set of |-separated directories for compatibility.
4061 if (my_trnlnm("PERL5LIB",buf,0))
4063 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4064 } while (my_trnlnm("PERL5LIB",buf,++idx));
4066 while (my_trnlnm("PERLLIB",buf,idx++))
4067 incpush_use_sep(buf, 0, 0);
4072 #ifndef PERL_IS_MINIPERL
4073 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4074 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4076 /* Use the ~-expanded versions of APPLLIB (undocumented),
4077 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4080 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4081 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4085 /* sitearch is always relative to sitelib on Windows for
4086 * DLL-based path intuition to work correctly */
4087 # if !defined(WIN32)
4088 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4089 INCPUSH_CAN_RELOCATE);
4095 /* this picks up sitearch as well */
4096 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4098 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4100 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4104 #ifdef PERL_VENDORARCH_EXP
4105 /* vendorarch is always relative to vendorlib on Windows for
4106 * DLL-based path intuition to work correctly */
4107 # if !defined(WIN32)
4108 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4109 INCPUSH_CAN_RELOCATE);
4113 #ifdef PERL_VENDORLIB_EXP
4115 /* this picks up vendorarch as well */
4116 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4118 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4120 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4121 INCPUSH_CAN_RELOCATE);
4126 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4130 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4134 s = win32_get_privlib(PERL_FS_VERSION, &len);
4136 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4139 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4141 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4145 #ifdef PERL_OTHERLIBDIRS
4146 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4147 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4148 |INCPUSH_CAN_RELOCATE);
4154 * It isn't possible to delete an environment variable with
4155 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4156 * case we treat PERL5LIB as undefined if it has a zero-length value.
4158 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4159 if (perl5lib && *perl5lib != '\0')
4163 incpush_use_sep(perl5lib, 0,
4164 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4166 /* Treat PERL5?LIB as a possible search list logical name -- the
4167 * "natural" VMS idiom for a Unix path string. We allow each
4168 * element to be a set of |-separated directories for compatibility.
4172 if (my_trnlnm("PERL5LIB",buf,0))
4174 incpush_use_sep(buf, 0,
4175 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4176 } while (my_trnlnm("PERL5LIB",buf,++idx));
4180 /* Use the ~-expanded versions of APPLLIB (undocumented),
4181 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4184 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4185 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4188 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4189 /* Search for version-specific dirs below here */
4190 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4191 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4195 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4196 /* Search for version-specific dirs below here */
4197 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4198 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4201 #ifdef PERL_OTHERLIBDIRS
4202 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4203 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4204 |INCPUSH_CAN_RELOCATE);
4206 #endif /* !PERL_IS_MINIPERL */
4209 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4212 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4213 # define PERLLIB_SEP ';'
4216 # define PERLLIB_SEP '|'
4218 # define PERLLIB_SEP ':'
4221 #ifndef PERLLIB_MANGLE
4222 # define PERLLIB_MANGLE(s,n) (s)
4225 /* Push a directory onto @INC if it exists.
4226 Generate a new SV if we do this, to save needing to copy the SV we push
4229 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4234 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4236 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4237 S_ISDIR(tmpstatbuf.st_mode)) {
4239 dir = newSVsv(stem);
4241 /* Truncate dir back to stem. */
4242 SvCUR_set(dir, SvCUR(stem));
4248 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4251 const U8 using_sub_dirs
4252 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4253 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4254 const U8 add_versioned_sub_dirs
4255 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4256 const U8 add_archonly_sub_dirs
4257 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4258 #ifdef PERL_INC_VERSION_LIST
4259 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4261 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4262 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4263 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4264 AV *const inc = GvAVn(PL_incgv);
4266 PERL_ARGS_ASSERT_INCPUSH;
4269 /* Could remove this vestigial extra block, if we don't mind a lot of
4270 re-indenting diff noise. */
4273 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4274 arranged to unshift #! line -I onto the front of @INC. However,
4275 -I can add version and architecture specific libraries, and they
4276 need to go first. The old code assumed that it was always
4277 pushing. Hence to make it work, need to push the architecture
4278 (etc) libraries onto a temporary array, then "unshift" that onto
4279 the front of @INC. */
4280 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4283 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4284 defined to so something (in os2/os2.c), but the code has been
4285 this way, ignoring any possible changed of length, since
4286 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4288 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4290 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4293 /* Do the if() outside the #ifdef to avoid warnings about an unused
4296 #ifdef PERL_RELOCATABLE_INC
4298 * Relocatable include entries are marked with a leading .../
4301 * 0: Remove that leading ".../"
4302 * 1: Remove trailing executable name (anything after the last '/')
4303 * from the perl path to give a perl prefix
4305 * While the @INC element starts "../" and the prefix ends with a real
4306 * directory (ie not . or ..) chop that real directory off the prefix
4307 * and the leading "../" from the @INC element. ie a logical "../"
4309 * Finally concatenate the prefix and the remainder of the @INC element
4310 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4311 * generates /usr/local/lib/perl5
4313 const char *libpath = SvPVX(libdir);
4314 STRLEN libpath_len = SvCUR(libdir);
4315 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4317 SV * const caret_X = get_sv("\030", 0);
4318 /* Going to use the SV just as a scratch buffer holding a C
4324 /* $^X is *the* source of taint if tainting is on, hence
4325 SvPOK() won't be true. */
4327 assert(SvPOKp(caret_X));
4328 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4330 /* Firstly take off the leading .../
4331 If all else fail we'll do the paths relative to the current
4333 sv_chop(libdir, libpath + 4);
4334 /* Don't use SvPV as we're intentionally bypassing taining,
4335 mortal copies that the mg_get of tainting creates, and
4336 corruption that seems to come via the save stack.
4337 I guess that the save stack isn't correctly set up yet. */
4338 libpath = SvPVX(libdir);
4339 libpath_len = SvCUR(libdir);
4341 /* This would work more efficiently with memrchr, but as it's
4342 only a GNU extension we'd need to probe for it and
4343 implement our own. Not hard, but maybe not worth it? */
4345 prefix = SvPVX(prefix_sv);
4346 lastslash = strrchr(prefix, '/');
4348 /* First time in with the *lastslash = '\0' we just wipe off
4349 the trailing /perl from (say) /usr/foo/bin/perl
4353 while ((*lastslash = '\0'), /* Do that, come what may. */
4354 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4355 && (lastslash = strrchr(prefix, '/')))) {
4356 if (lastslash[1] == '\0'
4357 || (lastslash[1] == '.'
4358 && (lastslash[2] == '/' /* ends "/." */
4359 || (lastslash[2] == '/'
4360 && lastslash[3] == '/' /* or "/.." */
4362 /* Prefix ends "/" or "/." or "/..", any of which
4363 are fishy, so don't do any more logical cleanup.
4367 /* Remove leading "../" from path */
4370 /* Next iteration round the loop removes the last
4371 directory name from prefix by writing a '\0' in
4372 the while clause. */
4374 /* prefix has been terminated with a '\0' to the correct
4375 length. libpath points somewhere into the libdir SV.
4376 We need to join the 2 with '/' and drop the result into
4378 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4379 SvREFCNT_dec(libdir);
4380 /* And this is the new libdir. */
4383 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4384 /* Need to taint reloccated paths if running set ID */
4385 SvTAINTED_on(libdir);
4388 SvREFCNT_dec(prefix_sv);
4393 * BEFORE pushing libdir onto @INC we may first push version- and
4394 * archname-specific sub-directories.
4396 if (using_sub_dirs) {
4398 #ifdef PERL_INC_VERSION_LIST
4399 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4400 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4401 const char * const *incver;
4408 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4410 while (unix[len-1] == '/') len--; /* Cosmetic */
4411 sv_usepvn(libdir,unix,len);
4414 PerlIO_printf(Perl_error_log,
4415 "Failed to unixify @INC element \"%s\"\n",
4419 subdir = newSVsv(libdir);
4421 if (add_versioned_sub_dirs) {
4422 /* .../version/archname if -d .../version/archname */
4423 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4424 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4426 /* .../version if -d .../version */
4427 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4428 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4431 #ifdef PERL_INC_VERSION_LIST
4433 for (incver = incverlist; *incver; incver++) {
4434 /* .../xxx if -d .../xxx */
4435 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4436 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4441 if (add_archonly_sub_dirs) {
4442 /* .../archname if -d .../archname */
4443 sv_catpvs(subdir, "/" ARCHNAME);
4444 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4448 assert (SvREFCNT(subdir) == 1);
4449 SvREFCNT_dec(subdir);
4452 /* finally add this lib directory at the end of @INC */
4454 U32 extra = av_len(av) + 1;
4455 av_unshift(inc, extra + push_basedir);
4457 av_store(inc, extra, libdir);
4459 /* av owns a reference, av_store() expects to be donated a
4460 reference, and av expects to be sane when it's cleared.
4461 If I wanted to be naughty and wrong, I could peek inside the
4462 implementation of av_clear(), realise that it uses
4463 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4464 and so directly steal from it (with a memcpy() to inc, and
4465 then memset() to NULL them out. But people copy code from the
4466 core expecting it to be best practise, so let's use the API.
4467 Although studious readers will note that I'm not checking any
4469 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4473 else if (push_basedir) {
4474 av_push(inc, libdir);
4477 if (!push_basedir) {
4478 assert (SvREFCNT(libdir) == 1);
4479 SvREFCNT_dec(libdir);
4485 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4489 /* This logic has been broken out from S_incpush(). It may be possible to
4492 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4499 /* Break at all separators */
4500 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4502 /* skip any consecutive separators */
4504 /* Uncomment the next line for PATH semantics */
4505 /* But you'll need to write tests */
4506 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4508 incpush(p, (STRLEN)(s - p), flags);
4513 incpush(p, (STRLEN)(end - p), flags);
4518 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4522 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4528 PERL_ARGS_ASSERT_CALL_LIST;
4530 while (av_len(paramList) >= 0) {
4531 cv = MUTABLE_CV(av_shift(paramList));
4533 if (paramList == PL_beginav) {
4534 /* save PL_beginav for compiler */
4535 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4537 else if (paramList == PL_checkav) {
4538 /* save PL_checkav for compiler */
4539 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4541 else if (paramList == PL_unitcheckav) {
4542 /* save PL_unitcheckav for compiler */
4543 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4554 PL_madskills |= 16384;
4559 PL_madskills &= ~16384;
4562 (void)SvPV_const(atsv, len);
4564 PL_curcop = &PL_compiling;
4565 CopLINE_set(PL_curcop, oldline);
4566 if (paramList == PL_beginav)
4567 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4569 Perl_sv_catpvf(aTHX_ atsv,
4570 "%s failed--call queue aborted",
4571 paramList == PL_checkav ? "CHECK"
4572 : paramList == PL_initav ? "INIT"
4573 : paramList == PL_unitcheckav ? "UNITCHECK"
4575 while (PL_scopestack_ix > oldscope)
4578 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4585 /* my_exit() was called */
4586 while (PL_scopestack_ix > oldscope)
4589 PL_curstash = PL_defstash;
4590 PL_curcop = &PL_compiling;
4591 CopLINE_set(PL_curcop, oldline);
4597 PL_curcop = &PL_compiling;
4598 CopLINE_set(PL_curcop, oldline);
4601 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4610 Perl_my_exit(pTHX_ U32 status)
4621 STATUS_EXIT_SET(status);
4628 Perl_my_failure_exit(pTHX)
4632 /* We have been called to fall on our sword. The desired exit code
4633 * should be already set in STATUS_UNIX, but could be shifted over
4634 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4637 * If an error code has not been set, then force the issue.
4639 if (MY_POSIX_EXIT) {
4641 /* According to the die_exit.t tests, if errno is non-zero */
4642 /* It should be used for the error status. */
4644 if (errno == EVMSERR) {
4645 STATUS_NATIVE = vaxc$errno;
4648 /* According to die_exit.t tests, if the child_exit code is */
4649 /* also zero, then we need to exit with a code of 255 */
4650 if ((errno != 0) && (errno < 256))
4651 STATUS_UNIX_EXIT_SET(errno);
4652 else if (STATUS_UNIX < 255) {
4653 STATUS_UNIX_EXIT_SET(255);
4658 /* The exit code could have been set by $? or vmsish which
4659 * means that it may not have fatal set. So convert
4660 * success/warning codes to fatal with out changing
4661 * the POSIX status code. The severity makes VMS native
4662 * status handling work, while UNIX mode programs use the
4663 * the POSIX exit codes.
4665 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4666 STATUS_NATIVE &= STS$M_COND_ID;
4667 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4671 /* Traditionally Perl on VMS always expects a Fatal Error. */
4672 if (vaxc$errno & 1) {
4674 /* So force success status to failure */
4675 if (STATUS_NATIVE & 1)
4680 STATUS_UNIX = EINTR; /* In case something cares */
4685 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4687 /* Encode the severity code */
4688 severity = STATUS_NATIVE & STS$M_SEVERITY;
4689 STATUS_UNIX = (severity ? severity : 1) << 8;
4691 /* Perl expects this to be a fatal error */
4692 if (severity != STS$K_SEVERE)
4701 STATUS_UNIX_SET(errno);
4703 exitstatus = STATUS_UNIX >> 8;
4704 if (exitstatus & 255)
4705 STATUS_UNIX_SET(exitstatus);
4707 STATUS_UNIX_SET(255);
4714 S_my_exit_jump(pTHX)
4719 SvREFCNT_dec(PL_e_script);
4723 POPSTACK_TO(PL_mainstack);
4731 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4734 const char * const p = SvPVX_const(PL_e_script);
4735 const char *nl = strchr(p, '\n');
4737 PERL_UNUSED_ARG(idx);
4738 PERL_UNUSED_ARG(maxlen);
4740 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4742 filter_del(read_e_script);
4745 sv_catpvn(buf_sv, p, nl-p);
4746 sv_chop(PL_e_script, nl);
4752 * c-indentation-style: bsd
4754 * indent-tabs-mode: t
4757 * ex: set ts=8 sts=4 sw=4 noet: