3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * A ship then new they built for him
13 * of mithril and of elven-glass
14 * --from Bilbo's song of EƤrendil
16 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
19 /* This file contains the top-level functions that are used to create, use
20 * and destroy a perl interpreter, plus the functions used by XS code to
21 * call back into perl. Note that it does not contain the actual main()
22 * function of the interpreter; that can be found in perlmain.c
26 #define PERL_IN_PERL_C
28 #include "patchlevel.h" /* for local_patches */
32 char *nw_get_sitelib(const char *pl);
35 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
40 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
42 # include <sys/wait.h>
50 char control[CMSG_SPACE(sizeof(int))];
67 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
68 char *getenv (char *); /* Usually in <stdlib.h> */
71 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
73 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
74 /* Drop everything. Heck, don't even try to call it */
75 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
77 /* Drop almost everything */
78 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
81 #define CALL_BODY_EVAL(myop) \
82 if (PL_op == (myop)) \
83 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
87 #define CALL_BODY_SUB(myop) \
88 if (PL_op == (myop)) \
89 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
93 #define CALL_LIST_BODY(cv) \
94 PUSHMARK(PL_stack_sp); \
95 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
98 S_init_tls_and_interp(PerlInterpreter *my_perl)
102 PERL_SET_INTERP(my_perl);
103 #if defined(USE_ITHREADS)
106 PERL_SET_THX(my_perl);
109 MUTEX_INIT(&PL_dollarzero_mutex);
111 #ifdef PERL_IMPLICIT_CONTEXT
112 MUTEX_INIT(&PL_my_ctx_mutex);
115 #if defined(USE_ITHREADS)
118 /* This always happens for non-ithreads */
121 PERL_SET_THX(my_perl);
126 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
129 Perl_sys_init(int* argc, char*** argv)
133 PERL_ARGS_ASSERT_SYS_INIT;
135 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
136 PERL_UNUSED_ARG(argv);
137 PERL_SYS_INIT_BODY(argc, argv);
141 Perl_sys_init3(int* argc, char*** argv, char*** env)
145 PERL_ARGS_ASSERT_SYS_INIT3;
147 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
148 PERL_UNUSED_ARG(argv);
149 PERL_UNUSED_ARG(env);
150 PERL_SYS_INIT3_BODY(argc, argv, env);
157 if (!PL_veto_cleanup) {
158 PERL_SYS_TERM_BODY();
163 #ifdef PERL_IMPLICIT_SYS
165 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
166 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
167 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
168 struct IPerlDir* ipD, struct IPerlSock* ipS,
169 struct IPerlProc* ipP)
171 PerlInterpreter *my_perl;
173 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
175 /* Newx() needs interpreter, so call malloc() instead */
176 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
177 S_init_tls_and_interp(my_perl);
178 Zero(my_perl, 1, PerlInterpreter);
188 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
195 =head1 Embedding Functions
197 =for apidoc perl_alloc
199 Allocates a new Perl interpreter. See L<perlembed>.
207 PerlInterpreter *my_perl;
209 /* Newx() needs interpreter, so call malloc() instead */
210 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
212 S_init_tls_and_interp(my_perl);
213 #ifndef PERL_TRACK_MEMPOOL
214 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
216 Zero(my_perl, 1, PerlInterpreter);
217 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
221 #endif /* PERL_IMPLICIT_SYS */
224 =for apidoc perl_construct
226 Initializes a new Perl interpreter. See L<perlembed>.
232 perl_construct(pTHXx)
236 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
240 PL_perl_destruct_level = 1;
242 PERL_UNUSED_ARG(my_perl);
243 if (PL_perl_destruct_level > 0)
246 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
248 /* set read-only and try to insure than we wont see REFCNT==0
251 SvREADONLY_on(&PL_sv_undef);
252 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
254 sv_setpv(&PL_sv_no,PL_No);
255 /* value lookup in void context - happens to have the side effect
256 of caching the numeric forms. However, as &PL_sv_no doesn't contain
257 a string that is a valid numer, we have to turn the public flags by
263 SvREADONLY_on(&PL_sv_no);
264 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
266 sv_setpv(&PL_sv_yes,PL_Yes);
269 SvREADONLY_on(&PL_sv_yes);
270 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
272 SvREADONLY_on(&PL_sv_placeholder);
273 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
275 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
276 #ifdef PERL_USES_PL_PIDSTATUS
277 PL_pidstatus = newHV();
280 PL_rs = newSVpvs("\n");
290 SET_NUMERIC_STANDARD();
292 #if defined(LOCAL_PATCH_COUNT)
293 PL_localpatches = local_patches; /* For possible -v */
296 #ifdef HAVE_INTERP_INTERN
300 PerlIO_init(aTHX); /* Hook to IO system */
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
306 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
307 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
309 /* First entry is a list of empty elements. It needs to be initialised
310 else all hell breaks loose in S_find_uninit_var(). */
311 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
312 PL_regex_pad = AvARRAY(PL_regex_padav);
314 #ifdef USE_REENTRANT_API
315 Perl_reentrant_init(aTHX);
318 /* Note that strtab is a rather special HV. Assumptions are made
319 about not iterating on it, and not adding tie magic to it.
320 It is properly deallocated in perl_destruct() */
323 HvSHAREKEYS_off(PL_strtab); /* mandatory */
324 hv_ksplit(PL_strtab, 512);
326 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
327 _dyld_lookup_and_bind
328 ("__environ", (unsigned long *) &environ_pointer, NULL);
332 # ifdef USE_ENVIRON_ARRAY
333 PL_origenviron = environ;
337 /* Use sysconf(_SC_CLK_TCK) if available, if not
338 * available or if the sysconf() fails, use the HZ.
339 * BeOS has those, but returns the wrong value.
340 * The HZ if not originally defined has been by now
341 * been defined as CLK_TCK, if available. */
342 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
343 PL_clocktick = sysconf(_SC_CLK_TCK);
344 if (PL_clocktick <= 0)
348 PL_stashcache = newHV();
350 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
351 (int)PERL_VERSION, (int)PERL_SUBVERSION);
354 if (!PL_mmap_page_size) {
355 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
357 SETERRNO(0, SS_NORMAL);
359 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
361 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
363 if ((long) PL_mmap_page_size < 0) {
365 SV * const error = ERRSV;
366 SvUPGRADE(error, SVt_PV);
367 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
370 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
374 # ifdef HAS_GETPAGESIZE
375 PL_mmap_page_size = getpagesize();
377 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
378 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
382 if (PL_mmap_page_size <= 0)
383 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
384 (IV) PL_mmap_page_size);
386 #endif /* HAS_MMAP */
388 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
389 PL_timesbase.tms_utime = 0;
390 PL_timesbase.tms_stime = 0;
391 PL_timesbase.tms_cutime = 0;
392 PL_timesbase.tms_cstime = 0;
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 /* wait for all pseudo-forked children to finish */
542 PERL_WAIT_FOR_CHILDREN;
544 destruct_level = PL_perl_destruct_level;
547 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
549 const int i = atoi(s);
550 if (destruct_level < i)
556 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
562 if (PL_endav && !PL_minus_c)
563 call_list(PL_scopestack_ix, PL_endav);
569 /* Need to flush since END blocks can produce output */
572 if (CALL_FPTR(PL_threadhook)(aTHX)) {
573 /* Threads hook has vetoed further cleanup */
574 PL_veto_cleanup = TRUE;
578 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
579 if (destruct_level != 0) {
580 /* Fork here to create a child. Our child's job is to preserve the
581 state of scalars prior to destruction, so that we can instruct it
582 to dump any scalars that we later find have leaked.
583 There's no subtlety in this code - it assumes POSIX, and it doesn't
587 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
588 perror("Debug leaking scalars socketpair failed");
594 perror("Debug leaking scalars fork failed");
598 /* We are the child */
599 const int sock = fd[1];
600 const int debug_fd = PerlIO_fileno(Perl_debug_log);
603 /* Our success message is an integer 0, and a char 0 */
604 static const char success[sizeof(int) + 1] = {0};
608 /* We need to close all other file descriptors otherwise we end up
609 with interesting hangs, where the parent closes its end of a
610 pipe, and sits waiting for (another) child to terminate. Only
611 that child never terminates, because it never gets EOF, because
612 we also have the far end of the pipe open. We even need to
613 close the debugging fd, because sometimes it happens to be one
614 end of a pipe, and a process is waiting on the other end for
615 EOF. Normally it would be closed at some point earlier in
616 destruction, but if we happen to cause the pipe to remain open,
617 EOF never occurs, and we get an infinite hang. Hence all the
618 games to pass in a file descriptor if it's actually needed. */
620 f = sysconf(_SC_OPEN_MAX);
622 where = "sysconf failed";
633 union control_un control;
636 struct cmsghdr *cmptr;
640 msg.msg_control = control.control;
641 msg.msg_controllen = sizeof(control.control);
642 /* We're a connected socket so we don't need a source */
646 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
648 vec[0].iov_base = (void*)⌖
649 vec[0].iov_len = sizeof(target);
651 got = recvmsg(sock, &msg, 0);
656 where = "recv failed";
659 if(got < sizeof(target)) {
660 where = "short recv";
664 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
668 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
669 where = "wrong cmsg_len";
672 if(cmptr->cmsg_level != SOL_SOCKET) {
673 where = "wrong cmsg_level";
676 if(cmptr->cmsg_type != SCM_RIGHTS) {
677 where = "wrong cmsg_type";
681 got_fd = *(int*)CMSG_DATA(cmptr);
682 /* For our last little bit of trickery, put the file descriptor
683 back into Perl_debug_log, as if we never actually closed it
685 if(got_fd != debug_fd) {
686 if (dup2(got_fd, debug_fd) == -1) {
693 PerlIO_flush(Perl_debug_log);
695 got = write(sock, &success, sizeof(success));
698 where = "write failed";
701 if(got < sizeof(success)) {
702 where = "short write";
709 int send_errno = errno;
710 unsigned char length = (unsigned char) strlen(where);
711 struct iovec failure[3] = {
712 {(void*)&send_errno, sizeof(send_errno)},
714 {(void*)where, length}
716 int got = writev(sock, failure, 3);
717 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
718 in the parent if we try to read from the socketpair after the
719 child has exited, even if there was data to read.
720 So sleep a bit to give the parent a fighting chance of
723 _exit((got == -1) ? errno : 0);
727 PL_dumper_fd = fd[0];
732 /* We must account for everything. */
734 /* Destroy the main CV and syntax tree */
735 /* Do this now, because destroying ops can cause new SVs to be generated
736 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
737 PL_curcop to point to a valid op from which the filename structure
739 PL_curcop = &PL_compiling;
741 /* ensure comppad/curpad to refer to main's pad */
742 if (CvPADLIST(PL_main_cv)) {
743 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
745 op_free(PL_main_root);
748 PL_main_start = NULL;
749 SvREFCNT_dec(PL_main_cv);
753 /* Tell PerlIO we are about to tear things apart in case
754 we have layers which are using resources that should
758 PerlIO_destruct(aTHX);
760 if (PL_sv_objcount) {
762 * Try to destruct global references. We do this first so that the
763 * destructors and destructees still exist. Some sv's might remain.
764 * Non-referenced objects are on their own.
768 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
769 PL_defoutgv = NULL; /* may have been freed */
772 /* unhook hooks which will soon be, or use, destroyed data */
773 SvREFCNT_dec(PL_warnhook);
775 SvREFCNT_dec(PL_diehook);
778 /* call exit list functions */
779 while (PL_exitlistlen-- > 0)
780 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
782 Safefree(PL_exitlist);
787 SvREFCNT_dec(PL_registered_mros);
789 /* jettison our possibly duplicated environment */
790 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
791 * so we certainly shouldn't free it here
794 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
795 if (environ != PL_origenviron && !PL_use_safe_putenv
797 /* only main thread can free environ[0] contents */
798 && PL_curinterp == aTHX
804 for (i = 0; environ[i]; i++)
805 safesysfree(environ[i]);
807 /* Must use safesysfree() when working with environ. */
808 safesysfree(environ);
810 environ = PL_origenviron;
813 #endif /* !PERL_MICRO */
815 if (destruct_level == 0) {
817 DEBUG_P(debprofdump());
819 #if defined(PERLIO_LAYERS)
820 /* No more IO - including error messages ! */
821 PerlIO_cleanup(aTHX);
824 CopFILE_free(&PL_compiling);
825 CopSTASH_free(&PL_compiling);
827 /* The exit() function will do everything that needs doing. */
831 /* reset so print() ends up where we expect */
835 /* the syntax tree is shared between clones
836 * so op_free(PL_main_root) only ReREFCNT_dec's
837 * REGEXPs in the parent interpreter
838 * we need to manually ReREFCNT_dec for the clones
840 SvREFCNT_dec(PL_regex_padav);
841 PL_regex_padav = NULL;
845 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
846 PL_stashcache = NULL;
848 /* loosen bonds of global variables */
850 /* XXX can PL_parser still be non-null here? */
851 if(PL_parser && PL_parser->rsfp) {
852 (void)PerlIO_close(PL_parser->rsfp);
853 PL_parser->rsfp = NULL;
857 Safefree(PL_splitstr);
867 PL_doswitches = FALSE;
868 PL_dowarn = G_WARN_OFF;
869 PL_doextract = FALSE;
870 PL_sawampersand = FALSE; /* must save all match strings */
873 Safefree(PL_inplace);
875 SvREFCNT_dec(PL_patchlevel);
878 SvREFCNT_dec(PL_e_script);
884 /* magical thingies */
886 SvREFCNT_dec(PL_ofsgv); /* *, */
889 SvREFCNT_dec(PL_ors_sv); /* $\ */
892 SvREFCNT_dec(PL_rs); /* $/ */
895 Safefree(PL_osname); /* $^O */
898 SvREFCNT_dec(PL_statname);
902 /* defgv, aka *_ should be taken care of elsewhere */
904 /* clean up after study() */
905 SvREFCNT_dec(PL_lastscream);
906 PL_lastscream = NULL;
907 Safefree(PL_screamfirst);
909 Safefree(PL_screamnext);
913 Safefree(PL_efloatbuf);
917 /* startup and shutdown function lists */
918 SvREFCNT_dec(PL_beginav);
919 SvREFCNT_dec(PL_beginav_save);
920 SvREFCNT_dec(PL_endav);
921 SvREFCNT_dec(PL_checkav);
922 SvREFCNT_dec(PL_checkav_save);
923 SvREFCNT_dec(PL_unitcheckav);
924 SvREFCNT_dec(PL_unitcheckav_save);
925 SvREFCNT_dec(PL_initav);
927 PL_beginav_save = NULL;
930 PL_checkav_save = NULL;
931 PL_unitcheckav = NULL;
932 PL_unitcheckav_save = NULL;
935 /* shortcuts just get cleared */
944 PL_last_in_gv = NULL;
956 SvREFCNT_dec(PL_argvout_stack);
957 PL_argvout_stack = NULL;
959 SvREFCNT_dec(PL_modglobal);
961 SvREFCNT_dec(PL_preambleav);
962 PL_preambleav = NULL;
963 SvREFCNT_dec(PL_subname);
965 #ifdef PERL_USES_PL_PIDSTATUS
966 SvREFCNT_dec(PL_pidstatus);
969 SvREFCNT_dec(PL_toptarget);
971 SvREFCNT_dec(PL_bodytarget);
972 PL_bodytarget = NULL;
973 PL_formtarget = NULL;
975 /* free locale stuff */
976 #ifdef USE_LOCALE_COLLATE
977 Safefree(PL_collation_name);
978 PL_collation_name = NULL;
981 #ifdef USE_LOCALE_NUMERIC
982 Safefree(PL_numeric_name);
983 PL_numeric_name = NULL;
984 SvREFCNT_dec(PL_numeric_radix_sv);
985 PL_numeric_radix_sv = NULL;
988 /* clear utf8 character classes */
989 SvREFCNT_dec(PL_utf8_alnum);
990 SvREFCNT_dec(PL_utf8_alnumc);
991 SvREFCNT_dec(PL_utf8_ascii);
992 SvREFCNT_dec(PL_utf8_alpha);
993 SvREFCNT_dec(PL_utf8_space);
994 SvREFCNT_dec(PL_utf8_cntrl);
995 SvREFCNT_dec(PL_utf8_graph);
996 SvREFCNT_dec(PL_utf8_digit);
997 SvREFCNT_dec(PL_utf8_upper);
998 SvREFCNT_dec(PL_utf8_lower);
999 SvREFCNT_dec(PL_utf8_print);
1000 SvREFCNT_dec(PL_utf8_punct);
1001 SvREFCNT_dec(PL_utf8_xdigit);
1002 SvREFCNT_dec(PL_utf8_mark);
1003 SvREFCNT_dec(PL_utf8_toupper);
1004 SvREFCNT_dec(PL_utf8_totitle);
1005 SvREFCNT_dec(PL_utf8_tolower);
1006 SvREFCNT_dec(PL_utf8_tofold);
1007 SvREFCNT_dec(PL_utf8_idstart);
1008 SvREFCNT_dec(PL_utf8_idcont);
1009 PL_utf8_alnum = NULL;
1010 PL_utf8_alnumc = NULL;
1011 PL_utf8_ascii = NULL;
1012 PL_utf8_alpha = NULL;
1013 PL_utf8_space = NULL;
1014 PL_utf8_cntrl = NULL;
1015 PL_utf8_graph = NULL;
1016 PL_utf8_digit = NULL;
1017 PL_utf8_upper = NULL;
1018 PL_utf8_lower = NULL;
1019 PL_utf8_print = NULL;
1020 PL_utf8_punct = NULL;
1021 PL_utf8_xdigit = NULL;
1022 PL_utf8_mark = NULL;
1023 PL_utf8_toupper = NULL;
1024 PL_utf8_totitle = NULL;
1025 PL_utf8_tolower = NULL;
1026 PL_utf8_tofold = NULL;
1027 PL_utf8_idstart = NULL;
1028 PL_utf8_idcont = NULL;
1030 if (!specialWARN(PL_compiling.cop_warnings))
1031 PerlMemShared_free(PL_compiling.cop_warnings);
1032 PL_compiling.cop_warnings = NULL;
1033 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1034 PL_compiling.cop_hints_hash = NULL;
1035 CopFILE_free(&PL_compiling);
1036 CopSTASH_free(&PL_compiling);
1038 /* Prepare to destruct main symbol table. */
1043 SvREFCNT_dec(PL_curstname);
1044 PL_curstname = NULL;
1046 /* clear queued errors */
1047 SvREFCNT_dec(PL_errors);
1050 SvREFCNT_dec(PL_isarev);
1053 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1054 if (PL_scopestack_ix != 0)
1055 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1056 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1057 (long)PL_scopestack_ix);
1058 if (PL_savestack_ix != 0)
1059 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1060 "Unbalanced saves: %ld more saves than restores\n",
1061 (long)PL_savestack_ix);
1062 if (PL_tmps_floor != -1)
1063 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1064 (long)PL_tmps_floor + 1);
1065 if (cxstack_ix != -1)
1066 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1067 (long)cxstack_ix + 1);
1070 /* Now absolutely destruct everything, somehow or other, loops or no. */
1072 /* the 2 is for PL_fdpid and PL_strtab */
1073 while (sv_clean_all() > 2)
1076 AvREAL_off(PL_fdpid); /* no surviving entries */
1077 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1080 #ifdef HAVE_INTERP_INTERN
1084 /* Destruct the global string table. */
1086 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1087 * so that sv_free() won't fail on them.
1088 * Now that the global string table is using a single hunk of memory
1089 * for both HE and HEK, we either need to explicitly unshare it the
1090 * correct way, or actually free things here.
1093 const I32 max = HvMAX(PL_strtab);
1094 HE * const * const array = HvARRAY(PL_strtab);
1095 HE *hent = array[0];
1098 if (hent && ckWARN_d(WARN_INTERNAL)) {
1099 HE * const next = HeNEXT(hent);
1100 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1101 "Unbalanced string table refcount: (%ld) for \"%s\"",
1102 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1109 hent = array[riter];
1114 HvARRAY(PL_strtab) = 0;
1115 HvTOTALKEYS(PL_strtab) = 0;
1116 HvFILL(PL_strtab) = 0;
1118 SvREFCNT_dec(PL_strtab);
1121 /* free the pointer tables used for cloning */
1122 ptr_table_free(PL_ptr_table);
1123 PL_ptr_table = (PTR_TBL_t*)NULL;
1126 /* free special SVs */
1128 SvREFCNT(&PL_sv_yes) = 0;
1129 sv_clear(&PL_sv_yes);
1130 SvANY(&PL_sv_yes) = NULL;
1131 SvFLAGS(&PL_sv_yes) = 0;
1133 SvREFCNT(&PL_sv_no) = 0;
1134 sv_clear(&PL_sv_no);
1135 SvANY(&PL_sv_no) = NULL;
1136 SvFLAGS(&PL_sv_no) = 0;
1140 for (i=0; i<=2; i++) {
1141 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1142 sv_clear(PERL_DEBUG_PAD(i));
1143 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1144 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1148 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1149 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1151 #ifdef DEBUG_LEAKING_SCALARS
1152 if (PL_sv_count != 0) {
1157 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1158 svend = &sva[SvREFCNT(sva)];
1159 for (sv = sva + 1; sv < svend; ++sv) {
1160 if (SvTYPE(sv) != SVTYPEMASK) {
1161 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1163 " refcnt=%"UVuf pTHX__FORMAT "\n"
1164 "\tallocated at %s:%d %s %s%s\n",
1165 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1167 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1169 sv->sv_debug_inpad ? "for" : "by",
1170 sv->sv_debug_optype ?
1171 PL_op_name[sv->sv_debug_optype]: "(none)",
1172 sv->sv_debug_cloned ? " (cloned)" : ""
1174 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1175 Perl_dump_sv_child(aTHX_ sv);
1181 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1185 /* Wait for up to 4 seconds for child to terminate.
1186 This seems to be the least effort way of timing out on reaping
1188 struct timeval waitfor = {4, 0};
1189 int sock = PL_dumper_fd;
1193 FD_SET(sock, &rset);
1194 select(sock + 1, &rset, NULL, NULL, &waitfor);
1195 waitpid(child, &status, WNOHANG);
1200 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1206 #ifdef PERL_DEBUG_READONLY_OPS
1212 #if defined(PERLIO_LAYERS)
1213 /* No more IO - including error messages ! */
1214 PerlIO_cleanup(aTHX);
1217 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1218 as currently layers use it rather than NULL as a marker
1219 for no arg - and will try and SvREFCNT_dec it.
1221 SvREFCNT(&PL_sv_undef) = 0;
1222 SvREADONLY_off(&PL_sv_undef);
1224 Safefree(PL_origfilename);
1225 PL_origfilename = NULL;
1226 Safefree(PL_reg_start_tmp);
1227 PL_reg_start_tmp = (char**)NULL;
1228 PL_reg_start_tmpl = 0;
1229 Safefree(PL_reg_curpm);
1230 Safefree(PL_reg_poscache);
1231 free_tied_hv_pool();
1232 Safefree(PL_op_mask);
1233 Safefree(PL_psig_ptr);
1234 PL_psig_ptr = (SV**)NULL;
1235 Safefree(PL_psig_name);
1236 PL_psig_name = (SV**)NULL;
1237 Safefree(PL_bitcount);
1239 Safefree(PL_psig_pend);
1240 PL_psig_pend = (int*)NULL;
1243 PL_tainting = FALSE;
1244 PL_taint_warn = FALSE;
1245 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1248 DEBUG_P(debprofdump());
1250 #ifdef USE_REENTRANT_API
1251 Perl_reentrant_free(aTHX);
1256 while (PL_regmatch_slab) {
1257 regmatch_slab *s = PL_regmatch_slab;
1258 PL_regmatch_slab = PL_regmatch_slab->next;
1262 /* As the absolutely last thing, free the non-arena SV for mess() */
1265 /* we know that type == SVt_PVMG */
1267 /* it could have accumulated taint magic */
1270 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1271 moremagic = mg->mg_moremagic;
1272 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1274 Safefree(mg->mg_ptr);
1278 /* we know that type >= SVt_PV */
1279 SvPV_free(PL_mess_sv);
1280 Safefree(SvANY(PL_mess_sv));
1281 Safefree(PL_mess_sv);
1288 =for apidoc perl_free
1290 Releases a Perl interpreter. See L<perlembed>.
1300 PERL_ARGS_ASSERT_PERL_FREE;
1302 if (PL_veto_cleanup)
1305 #ifdef PERL_TRACK_MEMPOOL
1308 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1309 * value as we're probably hunting memory leaks then
1311 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1312 if (!s || atoi(s) == 0) {
1313 const U32 old_debug = PL_debug;
1314 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1315 thread at thread exit. */
1317 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1318 "free this thread's memory\n");
1319 PL_debug &= ~ DEBUG_m_FLAG;
1321 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1322 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1323 PL_debug = old_debug;
1328 #if defined(WIN32) || defined(NETWARE)
1329 # if defined(PERL_IMPLICIT_SYS)
1332 void *host = nw_internal_host;
1334 void *host = w32_internal_host;
1336 PerlMem_free(aTHXx);
1338 nw_delete_internal_host(host);
1340 win32_delete_internal_host(host);
1344 PerlMem_free(aTHXx);
1347 PerlMem_free(aTHXx);
1351 #if defined(USE_ITHREADS)
1352 /* provide destructors to clean up the thread key when libperl is unloaded */
1353 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1355 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1356 #pragma fini "perl_fini"
1357 #elif defined(__sun) && !defined(__GNUC__)
1358 #pragma fini (perl_fini)
1362 #if defined(__GNUC__)
1363 __attribute__((destructor))
1368 if (PL_curinterp && !PL_veto_cleanup)
1373 #endif /* THREADS */
1376 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1379 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1380 PL_exitlist[PL_exitlistlen].fn = fn;
1381 PL_exitlist[PL_exitlistlen].ptr = ptr;
1385 #ifdef HAS_PROCSELFEXE
1386 /* This is a function so that we don't hold on to MAXPATHLEN
1387 bytes of stack longer than necessary
1390 S_procself_val(pTHX_ SV *sv, const char *arg0)
1392 char buf[MAXPATHLEN];
1393 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1395 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1396 includes a spurious NUL which will cause $^X to fail in system
1397 or backticks (this will prevent extensions from being built and
1398 many tests from working). readlink is not meant to add a NUL.
1399 Normal readlink works fine.
1401 if (len > 0 && buf[len-1] == '\0') {
1405 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1406 returning the text "unknown" from the readlink rather than the path
1407 to the executable (or returning an error from the readlink). Any valid
1408 path has a '/' in it somewhere, so use that to validate the result.
1409 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1411 if (len > 0 && memchr(buf, '/', len)) {
1412 sv_setpvn(sv,buf,len);
1418 #endif /* HAS_PROCSELFEXE */
1421 S_set_caret_X(pTHX) {
1423 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1425 #ifdef HAS_PROCSELFEXE
1426 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1429 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1431 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1438 =for apidoc perl_parse
1440 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1446 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1453 PERL_ARGS_ASSERT_PERL_PARSE;
1454 #ifndef MULTIPLICITY
1455 PERL_UNUSED_ARG(my_perl);
1458 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1459 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1460 * This MUST be done before any hash stores or fetches take place.
1461 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1462 * yourself, it is your responsibility to provide a good random seed!
1463 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1464 if (!PL_rehash_seed_set)
1465 PL_rehash_seed = get_hash_seed();
1467 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1469 if (s && (atoi(s) == 1))
1470 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1472 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1477 if (PL_origalen != 0) {
1478 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1481 /* Set PL_origalen be the sum of the contiguous argv[]
1482 * elements plus the size of the env in case that it is
1483 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1484 * as the maximum modifiable length of $0. In the worst case
1485 * the area we are able to modify is limited to the size of
1486 * the original argv[0]. (See below for 'contiguous', though.)
1488 const char *s = NULL;
1491 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1492 /* Do the mask check only if the args seem like aligned. */
1494 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1496 /* See if all the arguments are contiguous in memory. Note
1497 * that 'contiguous' is a loose term because some platforms
1498 * align the argv[] and the envp[]. If the arguments look
1499 * like non-aligned, assume that they are 'strictly' or
1500 * 'traditionally' contiguous. If the arguments look like
1501 * aligned, we just check that they are within aligned
1502 * PTRSIZE bytes. As long as no system has something bizarre
1503 * like the argv[] interleaved with some other data, we are
1504 * fine. (Did I just evoke Murphy's Law?) --jhi */
1505 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1507 for (i = 1; i < PL_origargc; i++) {
1508 if ((PL_origargv[i] == s + 1
1510 || PL_origargv[i] == s + 2
1515 (PL_origargv[i] > s &&
1517 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1528 #ifndef PERL_USE_SAFE_PUTENV
1529 /* Can we grab env area too to be used as the area for $0? */
1530 if (s && PL_origenviron && !PL_use_safe_putenv) {
1531 if ((PL_origenviron[0] == s + 1)
1534 (PL_origenviron[0] > s &&
1535 PL_origenviron[0] <=
1536 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1539 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1540 s = PL_origenviron[0];
1543 my_setenv("NoNe SuCh", NULL);
1544 /* Force copy of environment. */
1545 for (i = 1; PL_origenviron[i]; i++) {
1546 if (PL_origenviron[i] == s + 1
1549 (PL_origenviron[i] > s &&
1550 PL_origenviron[i] <=
1551 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1554 s = PL_origenviron[i];
1562 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1564 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1569 /* Come here if running an undumped a.out. */
1571 PL_origfilename = savepv(argv[0]);
1572 PL_do_undump = FALSE;
1573 cxstack_ix = -1; /* start label stack again */
1575 assert (!PL_tainted);
1577 S_set_caret_X(aTHX);
1579 init_postdump_symbols(argc,argv,env);
1584 op_free(PL_main_root);
1585 PL_main_root = NULL;
1587 PL_main_start = NULL;
1588 SvREFCNT_dec(PL_main_cv);
1592 oldscope = PL_scopestack_ix;
1593 PL_dowarn = G_WARN_OFF;
1598 parse_body(env,xsinit);
1600 call_list(oldscope, PL_unitcheckav);
1602 call_list(oldscope, PL_checkav);
1609 /* my_exit() was called */
1610 while (PL_scopestack_ix > oldscope)
1613 PL_curstash = PL_defstash;
1615 call_list(oldscope, PL_unitcheckav);
1617 call_list(oldscope, PL_checkav);
1621 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1630 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1634 int argc = PL_origargc;
1635 char **argv = PL_origargv;
1636 const char *scriptname = NULL;
1637 VOL bool dosearch = FALSE;
1640 const char *cddir = NULL;
1641 #ifdef USE_SITECUSTOMIZE
1642 bool minus_f = FALSE;
1644 SV *linestr_sv = newSV_type(SVt_PVIV);
1645 bool add_read_e_script = FALSE;
1647 SvGROW(linestr_sv, 80);
1648 sv_setpvs(linestr_sv,"");
1650 sv = newSVpvs(""); /* first used for -I flags */
1656 for (argc--,argv++; argc > 0; argc--,argv++) {
1657 if (argv[0][0] != '-' || !argv[0][1])
1663 #ifndef PERL_STRICT_CR
1687 if ((s = moreswitches(s)))
1692 CHECK_MALLOC_TOO_LATE_FOR('t');
1693 if( !PL_tainting ) {
1694 PL_taint_warn = TRUE;
1700 CHECK_MALLOC_TOO_LATE_FOR('T');
1702 PL_taint_warn = FALSE;
1710 #ifdef MACOS_TRADITIONAL
1711 /* ignore -e for Dev:Pseudo argument */
1712 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1715 forbid_setid('e', FALSE);
1717 PL_e_script = newSVpvs("");
1718 add_read_e_script = TRUE;
1721 sv_catpv(PL_e_script, s);
1723 sv_catpv(PL_e_script, argv[1]);
1727 Perl_croak(aTHX_ "No code specified for -%c", c);
1728 sv_catpvs(PL_e_script, "\n");
1732 #ifdef USE_SITECUSTOMIZE
1738 case 'I': /* -I handled both here and in moreswitches() */
1739 forbid_setid('I', FALSE);
1740 if (!*++s && (s=argv[1]) != NULL) {
1744 STRLEN len = strlen(s);
1745 const char * const p = savepvn(s, len);
1746 incpush(p, TRUE, TRUE, FALSE, FALSE, FALSE);
1747 sv_catpvs(sv, "-I");
1748 sv_catpvn(sv, p, len);
1753 Perl_croak(aTHX_ "No directory specified for -I");
1756 forbid_setid('S', FALSE);
1764 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1766 /* Can't do newSVpvs() as that would involve pre-processor
1767 condititionals inside a macro expansion. */
1768 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1775 # ifdef PERL_DONT_CREATE_GVSV
1776 " PERL_DONT_CREATE_GVSV"
1778 # ifdef PERL_MALLOC_WRAP
1781 # ifdef PERL_MEM_LOG
1784 # ifdef PERL_MEM_LOG_ENV
1787 # ifdef PERL_MEM_LOG_ENV_FD
1788 " PERL_MEM_LOG_ENV_FD"
1790 # ifdef PERL_MEM_LOG_STDERR
1791 " PERL_MEM_LOG_STDERR"
1793 # ifdef PERL_MEM_LOG_TIMESTAMP
1794 " PERL_MEM_LOG_TIMESTAMP"
1796 # ifdef PERL_USE_DEVEL
1799 # ifdef PERL_USE_SAFE_PUTENV
1800 " PERL_USE_SAFE_PUTENV"
1802 # ifdef USE_SITECUSTOMIZE
1803 " USE_SITECUSTOMIZE"
1805 # ifdef USE_FAST_STDIO
1810 sv_catpv(opts_prog, PL_bincompat_options);
1811 /* Terminate the qw(, and then wrap at 76 columns. */
1812 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1814 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1816 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1818 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1820 #if defined(LOCAL_PATCH_COUNT)
1821 if (LOCAL_PATCH_COUNT > 0) {
1823 sv_catpvs(opts_prog,
1824 "\" Locally applied patches:\\n\",");
1825 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1826 if (PL_localpatches[i])
1827 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1828 0, PL_localpatches[i], 0);
1832 Perl_sv_catpvf(aTHX_ opts_prog,
1833 "\" Built under %s\\n",OSNAME);
1836 sv_catpvs(opts_prog,
1837 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1839 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1842 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1843 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1844 "sort grep {/^PERL/} keys %ENV; ");
1846 sv_catpvs(opts_prog,
1847 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1849 sv_catpvs(opts_prog,
1850 "print \" \\%ENV:\\n @env\\n\" if @env;"
1851 "print \" \\@INC:\\n @INC\\n\";");
1855 opts_prog = Perl_newSVpvf(aTHX_
1856 "Config::config_vars(qw%c%s%c)",
1860 av_push(PL_preambleav, opts_prog);
1861 /* don't look for script or read stdin */
1862 scriptname = BIT_BUCKET;
1866 PL_doextract = TRUE;
1874 if (!*++s || isSPACE(*s)) {
1878 /* catch use of gnu style long options */
1879 if (strEQ(s, "version")) {
1883 if (strEQ(s, "help")) {
1890 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1901 #ifndef SECURE_INTERNAL_GETENV
1904 (s = PerlEnv_getenv("PERL5OPT")))
1908 if (*s == '-' && *(s+1) == 'T') {
1909 CHECK_MALLOC_TOO_LATE_FOR('T');
1911 PL_taint_warn = FALSE;
1914 char *popt_copy = NULL;
1927 if (!strchr("CDIMUdmtw", *s))
1928 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1932 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1933 s = popt_copy + (s - d);
1941 if( !PL_tainting ) {
1942 PL_taint_warn = TRUE;
1953 #ifdef USE_SITECUSTOMIZE
1955 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1956 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1961 scriptname = argv[0];
1964 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1966 else if (scriptname == NULL) {
1968 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1974 /* Set $^X early so that it can be used for relocatable paths in @INC */
1975 assert (!PL_tainted);
1977 S_set_caret_X(aTHX);
1982 bool suidscript = FALSE;
1984 open_script(scriptname, dosearch, &suidscript, &rsfp);
1986 validate_suid(validarg, scriptname, fdscript, suidscript,
1990 # if defined(SIGCHLD) || defined(SIGCLD)
1993 # define SIGCHLD SIGCLD
1995 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1996 if (sigstate == (Sighandler_t) SIG_IGN) {
1997 if (ckWARN(WARN_SIGNAL))
1998 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
1999 "Can't ignore signal CHLD, forcing to default");
2000 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2007 #ifdef MACOS_TRADITIONAL
2008 || gMacPerl_AlwaysExtract
2012 /* This will croak if suidscript is true, as -x cannot be used with
2014 forbid_setid('x', suidscript);
2015 /* Hence you can't get here if suidscript is true */
2017 find_beginning(linestr_sv, rsfp);
2018 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2019 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2023 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2024 CvUNIQUE_on(PL_compcv);
2026 CvPADLIST(PL_compcv) = pad_new(0);
2028 PL_isarev = newHV();
2031 boot_core_UNIVERSAL();
2032 boot_core_xsutils();
2036 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2038 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2044 # ifdef HAS_SOCKS5_INIT
2045 socks5_init(argv[0]);
2051 init_predump_symbols();
2052 /* init_postdump_symbols not currently designed to be called */
2053 /* more than once (ENV isn't cleared first, for example) */
2054 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2056 init_postdump_symbols(argc,argv,env);
2058 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2059 * or explicitly in some platforms.
2060 * locale.c:Perl_init_i18nl10n() if the environment
2061 * look like the user wants to use UTF-8. */
2062 #if defined(__SYMBIAN32__)
2063 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2066 /* Requires init_predump_symbols(). */
2067 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2072 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2073 * and the default open disciplines. */
2074 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2075 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2077 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2078 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2079 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2081 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2082 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2083 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2085 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2086 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2087 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2089 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2090 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2093 sv_setpvs(sv, ":utf8\0:utf8");
2095 sv_setpvs(sv, ":utf8\0");
2098 sv_setpvs(sv, "\0:utf8");
2106 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2107 if (strEQ(s, "unsafe"))
2108 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2109 else if (strEQ(s, "safe"))
2110 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2112 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2119 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2123 PL_xmlfp = PerlIO_stdout();
2125 PL_xmlfp = PerlIO_open(s, "w");
2127 Perl_croak(aTHX_ "Can't open %s", s);
2129 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2135 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2136 PL_madskills = atoi(s);
2137 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2142 lex_start(linestr_sv, rsfp, TRUE);
2143 PL_subname = newSVpvs("main");
2145 if (add_read_e_script)
2146 filter_add(read_e_script, NULL);
2148 /* now parse the script */
2150 SETERRNO(0,SS_NORMAL);
2151 #ifdef MACOS_TRADITIONAL
2152 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2154 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2156 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2157 MacPerl_MPWFileName(PL_origfilename));
2161 if (yyparse() || PL_parser->error_count) {
2163 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2165 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2170 CopLINE_set(PL_curcop, 0);
2171 PL_curstash = PL_defstash;
2173 SvREFCNT_dec(PL_e_script);
2181 SAVECOPFILE(PL_curcop);
2182 SAVECOPLINE(PL_curcop);
2183 gv_check(PL_defstash);
2192 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2193 dump_mstats("after compilation:");
2203 =for apidoc perl_run
2205 Tells a Perl interpreter to run. See L<perlembed>.
2218 PERL_ARGS_ASSERT_PERL_RUN;
2219 #ifndef MULTIPLICITY
2220 PERL_UNUSED_ARG(my_perl);
2223 oldscope = PL_scopestack_ix;
2231 cxstack_ix = -1; /* start context stack again */
2233 case 0: /* normal completion */
2237 case 2: /* my_exit() */
2238 while (PL_scopestack_ix > oldscope)
2241 PL_curstash = PL_defstash;
2242 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2243 PL_endav && !PL_minus_c)
2244 call_list(oldscope, PL_endav);
2246 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2247 dump_mstats("after execution: ");
2253 POPSTACK_TO(PL_mainstack);
2256 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2267 S_run_body(pTHX_ I32 oldscope)
2270 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2271 PL_sawampersand ? "Enabling" : "Omitting"));
2273 if (!PL_restartop) {
2277 exit(0); /* less likely to core dump than my_exit(0) */
2280 DEBUG_x(dump_all());
2283 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2287 #ifdef MACOS_TRADITIONAL
2288 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2289 (gMacPerl_ErrorFormat ? "# " : ""),
2290 MacPerl_MPWFileName(PL_origfilename));
2292 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2296 if (PERLDB_SINGLE && PL_DBsingle)
2297 sv_setiv(PL_DBsingle, 1);
2299 call_list(oldscope, PL_initav);
2300 #ifdef PERL_DEBUG_READONLY_OPS
2301 Perl_pending_Slabs_to_ro(aTHX);
2308 PL_op = PL_restartop;
2312 else if (PL_main_start) {
2313 CvDEPTH(PL_main_cv) = 1;
2314 PL_op = PL_main_start;
2322 =head1 SV Manipulation Functions
2324 =for apidoc p||get_sv
2326 Returns the SV of the specified Perl scalar. C<flags> are passed to
2327 C<gv_fetchpv>. If C<GV_ADD> is set and the
2328 Perl variable does not exist then it will be created. If C<flags> is zero
2329 and the variable does not exist then NULL is returned.
2335 Perl_get_sv(pTHX_ const char *name, I32 flags)
2339 PERL_ARGS_ASSERT_GET_SV;
2341 gv = gv_fetchpv(name, flags, SVt_PV);
2348 =head1 Array Manipulation Functions
2350 =for apidoc p||get_av
2352 Returns the AV of the specified Perl array. C<flags> are passed to
2353 C<gv_fetchpv>. If C<GV_ADD> is set and the
2354 Perl variable does not exist then it will be created. If C<flags> is zero
2355 and the variable does not exist then NULL is returned.
2361 Perl_get_av(pTHX_ const char *name, I32 flags)
2363 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2365 PERL_ARGS_ASSERT_GET_AV;
2375 =head1 Hash Manipulation Functions
2377 =for apidoc p||get_hv
2379 Returns the HV of the specified Perl hash. C<flags> are passed to
2380 C<gv_fetchpv>. If C<GV_ADD> is set and the
2381 Perl variable does not exist then it will be created. If C<flags> is zero
2382 and the variable does not exist then NULL is returned.
2388 Perl_get_hv(pTHX_ const char *name, I32 flags)
2390 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2392 PERL_ARGS_ASSERT_GET_HV;
2402 =head1 CV Manipulation Functions
2404 =for apidoc p||get_cvn_flags
2406 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2407 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2408 exist then it will be declared (which has the same effect as saying
2409 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2410 then NULL is returned.
2412 =for apidoc p||get_cv
2414 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2420 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2422 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2423 /* XXX this is probably not what they think they're getting.
2424 * It has the same effect as "sub name;", i.e. just a forward
2427 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2429 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2430 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2431 return newSUB(start_subparse(FALSE, 0),
2432 newSVOP(OP_CONST, 0, sv),
2440 /* Nothing in core calls this now, but we can't replace it with a macro and
2441 move it to mathoms.c as a macro would evaluate name twice. */
2443 Perl_get_cv(pTHX_ const char *name, I32 flags)
2445 PERL_ARGS_ASSERT_GET_CV;
2447 return get_cvn_flags(name, strlen(name), flags);
2450 /* Be sure to refetch the stack pointer after calling these routines. */
2454 =head1 Callback Functions
2456 =for apidoc p||call_argv
2458 Performs a callback to the specified Perl sub. See L<perlcall>.
2464 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2466 /* See G_* flags in cop.h */
2467 /* null terminated arg list */
2472 PERL_ARGS_ASSERT_CALL_ARGV;
2477 mXPUSHs(newSVpv(*argv,0));
2482 return call_pv(sub_name, flags);
2486 =for apidoc p||call_pv
2488 Performs a callback to the specified Perl sub. See L<perlcall>.
2494 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2495 /* name of the subroutine */
2496 /* See G_* flags in cop.h */
2498 PERL_ARGS_ASSERT_CALL_PV;
2500 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2504 =for apidoc p||call_method
2506 Performs a callback to the specified Perl method. The blessed object must
2507 be on the stack. See L<perlcall>.
2513 Perl_call_method(pTHX_ const char *methname, I32 flags)
2514 /* name of the subroutine */
2515 /* See G_* flags in cop.h */
2517 PERL_ARGS_ASSERT_CALL_METHOD;
2519 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2522 /* May be called with any of a CV, a GV, or an SV containing the name. */
2524 =for apidoc p||call_sv
2526 Performs a callback to the Perl sub whose name is in the SV. See
2533 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2534 /* See G_* flags in cop.h */
2537 LOGOP myop; /* fake syntax tree node */
2542 bool oldcatch = CATCH_GET;
2544 OP* const oldop = PL_op;
2547 PERL_ARGS_ASSERT_CALL_SV;
2549 if (flags & G_DISCARD) {
2553 if (!(flags & G_WANT)) {
2554 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2559 Zero(&myop, 1, LOGOP);
2560 myop.op_next = NULL;
2561 if (!(flags & G_NOARGS))
2562 myop.op_flags |= OPf_STACKED;
2563 myop.op_flags |= OP_GIMME_REVERSE(flags);
2567 EXTEND(PL_stack_sp, 1);
2568 *++PL_stack_sp = sv;
2570 oldscope = PL_scopestack_ix;
2572 if (PERLDB_SUB && PL_curstash != PL_debstash
2573 /* Handle first BEGIN of -d. */
2574 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2575 /* Try harder, since this may have been a sighandler, thus
2576 * curstash may be meaningless. */
2577 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2578 && !(flags & G_NODEBUG))
2579 PL_op->op_private |= OPpENTERSUB_DB;
2581 if (flags & G_METHOD) {
2582 Zero(&method_op, 1, UNOP);
2583 method_op.op_next = PL_op;
2584 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2585 method_op.op_type = OP_METHOD;
2586 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2587 myop.op_type = OP_ENTERSUB;
2588 PL_op = (OP*)&method_op;
2591 if (!(flags & G_EVAL)) {
2593 CALL_BODY_SUB((OP*)&myop);
2594 retval = PL_stack_sp - (PL_stack_base + oldmark);
2595 CATCH_SET(oldcatch);
2598 myop.op_other = (OP*)&myop;
2600 create_eval_scope(flags|G_FAKINGEVAL);
2608 CALL_BODY_SUB((OP*)&myop);
2609 retval = PL_stack_sp - (PL_stack_base + oldmark);
2610 if (!(flags & G_KEEPERR)) {
2618 /* my_exit() was called */
2619 PL_curstash = PL_defstash;
2622 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2623 Perl_croak(aTHX_ "Callback called exit");
2628 PL_op = PL_restartop;
2632 PL_stack_sp = PL_stack_base + oldmark;
2633 if ((flags & G_WANT) == G_ARRAY)
2637 *++PL_stack_sp = &PL_sv_undef;
2642 if (PL_scopestack_ix > oldscope)
2643 delete_eval_scope();
2647 if (flags & G_DISCARD) {
2648 PL_stack_sp = PL_stack_base + oldmark;
2657 /* Eval a string. The G_EVAL flag is always assumed. */
2660 =for apidoc p||eval_sv
2662 Tells Perl to C<eval> the string in the SV.
2668 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2670 /* See G_* flags in cop.h */
2674 UNOP myop; /* fake syntax tree node */
2675 VOL I32 oldmark = SP - PL_stack_base;
2678 OP* const oldop = PL_op;
2681 PERL_ARGS_ASSERT_EVAL_SV;
2683 if (flags & G_DISCARD) {
2690 Zero(PL_op, 1, UNOP);
2691 EXTEND(PL_stack_sp, 1);
2692 *++PL_stack_sp = sv;
2694 if (!(flags & G_NOARGS))
2695 myop.op_flags = OPf_STACKED;
2696 myop.op_next = NULL;
2697 myop.op_type = OP_ENTEREVAL;
2698 myop.op_flags |= OP_GIMME_REVERSE(flags);
2699 if (flags & G_KEEPERR)
2700 myop.op_flags |= OPf_SPECIAL;
2702 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2703 * before a PUSHEVAL, which corrupts the stack after a croak */
2704 TAINT_PROPER("eval_sv()");
2710 CALL_BODY_EVAL((OP*)&myop);
2711 retval = PL_stack_sp - (PL_stack_base + oldmark);
2712 if (!(flags & G_KEEPERR)) {
2720 /* my_exit() was called */
2721 PL_curstash = PL_defstash;
2724 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2725 Perl_croak(aTHX_ "Callback called exit");
2730 PL_op = PL_restartop;
2734 PL_stack_sp = PL_stack_base + oldmark;
2735 if ((flags & G_WANT) == G_ARRAY)
2739 *++PL_stack_sp = &PL_sv_undef;
2745 if (flags & G_DISCARD) {
2746 PL_stack_sp = PL_stack_base + oldmark;
2756 =for apidoc p||eval_pv
2758 Tells Perl to C<eval> the given string and return an SV* result.
2764 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2768 SV* sv = newSVpv(p, 0);
2770 PERL_ARGS_ASSERT_EVAL_PV;
2772 eval_sv(sv, G_SCALAR);
2779 if (croak_on_error && SvTRUE(ERRSV)) {
2780 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2786 /* Require a module. */
2789 =head1 Embedding Functions
2791 =for apidoc p||require_pv
2793 Tells Perl to C<require> the file named by the string argument. It is
2794 analogous to the Perl code C<eval "require '$file'">. It's even
2795 implemented that way; consider using load_module instead.
2800 Perl_require_pv(pTHX_ const char *pv)
2806 PERL_ARGS_ASSERT_REQUIRE_PV;
2808 PUSHSTACKi(PERLSI_REQUIRE);
2810 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2811 eval_sv(sv_2mortal(sv), G_DISCARD);
2817 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2819 /* This message really ought to be max 23 lines.
2820 * Removed -h because the user already knows that option. Others? */
2822 static const char * const usage_msg[] = {
2823 "-0[octal] specify record separator (\\0, if no argument)",
2824 "-a autosplit mode with -n or -p (splits $_ into @F)",
2825 "-C[number/list] enables the listed Unicode features",
2826 "-c check syntax only (runs BEGIN and CHECK blocks)",
2827 "-d[:debugger] run program under debugger",
2828 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2829 "-e program one line of program (several -e's allowed, omit programfile)",
2830 "-E program like -e, but enables all optional features",
2831 "-f don't do $sitelib/sitecustomize.pl at startup",
2832 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2833 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2834 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2835 "-l[octal] enable line ending processing, specifies line terminator",
2836 "-[mM][-]module execute \"use/no module...\" before executing program",
2837 "-n assume \"while (<>) { ... }\" loop around program",
2838 "-p assume loop like -n but print line also, like sed",
2839 "-s enable rudimentary parsing for switches after programfile",
2840 "-S look for programfile using PATH environment variable",
2841 "-t enable tainting warnings",
2842 "-T enable tainting checks",
2843 "-u dump core after parsing program",
2844 "-U allow unsafe operations",
2845 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2846 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2847 "-w enable many useful warnings (RECOMMENDED)",
2848 "-W enable all warnings",
2849 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2850 "-X disable all warnings",
2854 const char * const *p = usage_msg;
2856 PERL_ARGS_ASSERT_USAGE;
2858 PerlIO_printf(PerlIO_stdout(),
2859 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2862 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2865 /* convert a string of -D options (or digits) into an int.
2866 * sets *s to point to the char after the options */
2870 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2872 static const char * const usage_msgd[] = {
2873 " Debugging flag values: (see also -d)",
2874 " p Tokenizing and parsing (with v, displays parse stack)",
2875 " s Stack snapshots (with v, displays all stacks)",
2876 " l Context (loop) stack processing",
2877 " t Trace execution",
2878 " o Method and overloading resolution",
2879 " c String/numeric conversions",
2880 " P Print profiling info, source file input state",
2881 " m Memory and SV allocation",
2882 " f Format processing",
2883 " r Regular expression parsing and execution",
2884 " x Syntax tree dump",
2885 " u Tainting checks",
2886 " H Hash dump -- usurps values()",
2887 " X Scratchpad allocation",
2890 " R Include reference counts of dumped variables (eg when using -Ds)",
2891 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2892 " v Verbose: use in conjunction with other flags",
2894 " A Consistency checks on internal structures",
2895 " q quiet - currently only suppresses the 'EXECUTING' message",
2900 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2903 /* if adding extra options, remember to update DEBUG_MASK */
2904 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2906 for (; isALNUM(**s); (*s)++) {
2907 const char * const d = strchr(debopts,**s);
2909 i |= 1 << (d - debopts);
2910 else if (ckWARN_d(WARN_DEBUGGING))
2911 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2912 "invalid option -D%c, use -D'' to see choices\n", **s);
2915 else if (isDIGIT(**s)) {
2917 for (; isALNUM(**s); (*s)++) ;
2919 else if (givehelp) {
2920 const char *const *p = usage_msgd;
2921 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2924 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2925 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2926 "-Dp not implemented on this platform\n");
2932 /* This routine handles any switches that can be given during run */
2935 Perl_moreswitches(pTHX_ const char *s)
2939 const char option = *s; /* used to remember option in -m/-M code */
2941 PERL_ARGS_ASSERT_MORESWITCHES;
2949 SvREFCNT_dec(PL_rs);
2950 if (s[1] == 'x' && s[2]) {
2951 const char *e = s+=2;
2957 flags = PERL_SCAN_SILENT_ILLDIGIT;
2958 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2959 if (s + numlen < e) {
2960 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2964 PL_rs = newSVpvs("");
2965 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2966 tmps = (U8*)SvPVX(PL_rs);
2967 uvchr_to_utf8(tmps, rschar);
2968 SvCUR_set(PL_rs, UNISKIP(rschar));
2973 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2974 if (rschar & ~((U8)~0))
2975 PL_rs = &PL_sv_undef;
2976 else if (!rschar && numlen >= 2)
2977 PL_rs = newSVpvs("");
2979 char ch = (char)rschar;
2980 PL_rs = newSVpvn(&ch, 1);
2983 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2988 PL_unicode = parse_unicode_opts( (const char **)&s );
2989 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2995 while (*s && !isSPACE(*s)) ++s;
2996 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3007 forbid_setid('d', FALSE);
3010 /* -dt indicates to the debugger that threads will be used */
3011 if (*s == 't' && !isALNUM(s[1])) {
3013 my_setenv("PERL5DB_THREADED", "1");
3016 /* The following permits -d:Mod to accepts arguments following an =
3017 in the fashion that -MSome::Mod does. */
3018 if (*s == ':' || *s == '=') {
3019 const char *start = ++s;
3020 const char *const end = s + strlen(s);
3021 SV * const sv = newSVpvs("use Devel::");
3023 /* We now allow -d:Module=Foo,Bar */
3024 while(isALNUM(*s) || *s==':') ++s;
3026 sv_catpvn(sv, start, end - start);
3028 sv_catpvn(sv, start, s-start);
3029 /* Don't use NUL as q// delimiter here, this string goes in the
3031 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3034 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3038 PL_perldb = PERLDB_ALL;
3045 forbid_setid('D', FALSE);
3047 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3048 #else /* !DEBUGGING */
3049 if (ckWARN_d(WARN_DEBUGGING))
3050 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3051 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3052 for (s++; isALNUM(*s); s++) ;
3057 usage(PL_origargv[0]);
3060 Safefree(PL_inplace);
3061 #if defined(__CYGWIN__) /* do backup extension automagically */
3062 if (*(s+1) == '\0') {
3063 PL_inplace = savepvs(".bak");
3066 #endif /* __CYGWIN__ */
3068 const char * const start = ++s;
3069 while (*s && !isSPACE(*s))
3072 PL_inplace = savepvn(start, s - start);
3076 if (*s == '-') /* Additional switches on #! line. */
3080 case 'I': /* -I handled both here and in parse_body() */
3081 forbid_setid('I', FALSE);
3083 while (*s && isSPACE(*s))
3088 /* ignore trailing spaces (possibly followed by other switches) */
3090 for (e = p; *e && !isSPACE(*e); e++) ;
3094 } while (*p && *p != '-');
3095 e = savepvn(s, e-s);
3096 incpush(e, TRUE, TRUE, FALSE, FALSE, TRUE);
3103 Perl_croak(aTHX_ "No directory specified for -I");
3109 SvREFCNT_dec(PL_ors_sv);
3115 PL_ors_sv = newSVpvs("\n");
3116 numlen = 3 + (*s == '0');
3117 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3121 if (RsPARA(PL_rs)) {
3122 PL_ors_sv = newSVpvs("\n\n");
3125 PL_ors_sv = newSVsv(PL_rs);
3130 forbid_setid('M', FALSE); /* XXX ? */
3133 forbid_setid('m', FALSE); /* XXX ? */
3138 const char *use = "use ";
3140 /* -M-foo == 'no foo' */
3141 /* Leading space on " no " is deliberate, to make both
3142 possibilities the same length. */
3143 if (*s == '-') { use = " no "; ++s; }
3144 sv = newSVpvn(use,4);
3146 /* We allow -M'Module qw(Foo Bar)' */
3147 while(isALNUM(*s) || *s==':') {
3156 Perl_croak(aTHX_ "Module name required with -%c option",
3159 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3160 "contains single ':'",
3161 (int)(s - start), start, option);
3162 end = s + strlen(s);
3164 sv_catpvn(sv, start, end - start);
3165 if (option == 'm') {
3167 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3168 sv_catpvs( sv, " ()");
3171 sv_catpvn(sv, start, s-start);
3172 /* Use NUL as q''-delimiter. */
3173 sv_catpvs(sv, " split(/,/,q\0");
3175 sv_catpvn(sv, s, end - s);
3176 sv_catpvs(sv, "\0)");
3179 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3182 Perl_croak(aTHX_ "Missing argument to -%c", option);
3193 forbid_setid('s', FALSE);
3194 PL_doswitches = TRUE;
3208 #ifdef MACOS_TRADITIONAL
3209 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3211 PL_do_undump = TRUE;
3219 if (!sv_derived_from(PL_patchlevel, "version"))
3220 upg_version(PL_patchlevel, TRUE);
3223 SV* level= vstringify(PL_patchlevel);
3224 #ifdef PERL_PATCHNUM
3225 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3226 SV *num = newSVpvs(PERL_PATCHNUM "*");
3228 SV *num = newSVpvs(PERL_PATCHNUM);
3231 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3232 SvREFCNT_dec(level);
3235 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3239 PerlIO_printf(PerlIO_stdout(),
3240 "\nThis is perl, %"SVf
3244 SvREFCNT_dec(level);
3247 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3248 PerlIO_printf(PerlIO_stdout(),
3249 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3250 SVfARG(vstringify(PL_patchlevel))));
3251 PerlIO_printf(PerlIO_stdout(),
3252 Perl_form(aTHX_ " built under %s at %s %s\n",
3253 OSNAME, __DATE__, __TIME__));
3254 PerlIO_printf(PerlIO_stdout(),
3255 Perl_form(aTHX_ " OS Specific Release: %s\n",
3258 #if defined(LOCAL_PATCH_COUNT)
3259 if (LOCAL_PATCH_COUNT > 0)
3260 PerlIO_printf(PerlIO_stdout(),
3261 "\n(with %d registered patch%s, "
3262 "see perl -V for more detail)",
3264 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "\n\nCopyright 1987-2009, Larry Wall\n");
3269 #ifdef MACOS_TRADITIONAL
3270 PerlIO_printf(PerlIO_stdout(),
3271 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3272 "maintained by Chris Nandor\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3281 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3286 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "atariST series port, ++jrb bammi@cadence.com\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "MiNT port by Guido Flohr, 1997-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "EPOC port by Olaf Flebbe, 1999-2002\n");
3325 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3326 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3329 #ifdef __SYMBIAN32__
3330 PerlIO_printf(PerlIO_stdout(),
3331 "Symbian port by Nokia, 2004-2005\n");
3333 #ifdef BINARY_BUILD_NOTICE
3334 BINARY_BUILD_NOTICE;
3336 PerlIO_printf(PerlIO_stdout(),
3338 Perl may be copied only under the terms of either the Artistic License or the\n\
3339 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3340 Complete documentation for Perl, including FAQ lists, should be found on\n\
3341 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3342 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3345 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3346 PL_dowarn |= G_WARN_ON;
3351 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3352 if (!specialWARN(PL_compiling.cop_warnings))
3353 PerlMemShared_free(PL_compiling.cop_warnings);
3354 PL_compiling.cop_warnings = pWARN_ALL ;
3358 PL_dowarn = G_WARN_ALL_OFF;
3359 if (!specialWARN(PL_compiling.cop_warnings))
3360 PerlMemShared_free(PL_compiling.cop_warnings);
3361 PL_compiling.cop_warnings = pWARN_NONE ;
3368 if (s[0] == '-') /* Additional switches on #! line. */
3373 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3379 #ifdef ALTERNATE_SHEBANG
3380 case 'S': /* OS/2 needs -S on "extproc" line. */
3384 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3389 /* compliments of Tom Christiansen */
3391 /* unexec() can be found in the Gnu emacs distribution */
3392 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3395 Perl_my_unexec(pTHX)
3397 PERL_UNUSED_CONTEXT;
3399 SV * prog = newSVpv(BIN_EXP, 0);
3400 SV * file = newSVpv(PL_origfilename, 0);
3404 sv_catpvs(prog, "/perl");
3405 sv_catpvs(file, ".perldump");
3407 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3408 /* unexec prints msg to stderr in case of failure */
3409 PerlProc_exit(status);
3412 # include <lib$routines.h>
3413 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3414 # elif defined(WIN32) || defined(__CYGWIN__)
3415 Perl_croak(aTHX_ "dump is not supported");
3417 ABORT(); /* for use with undump */
3422 /* initialize curinterp */
3428 # define PERLVAR(var,type)
3429 # define PERLVARA(var,n,type)
3430 # if defined(PERL_IMPLICIT_CONTEXT)
3431 # define PERLVARI(var,type,init) aTHX->var = init;
3432 # define PERLVARIC(var,type,init) aTHX->var = init;
3434 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3435 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3437 # include "intrpvar.h"
3443 # define PERLVAR(var,type)
3444 # define PERLVARA(var,n,type)
3445 # define PERLVARI(var,type,init) PL_##var = init;
3446 # define PERLVARIC(var,type,init) PL_##var = init;
3447 # include "intrpvar.h"
3454 /* As these are inside a structure, PERLVARI isn't capable of initialising
3456 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3457 PL_reg_poscache = PL_reg_starttry = NULL;
3461 S_init_main_stash(pTHX)
3466 PL_curstash = PL_defstash = newHV();
3467 /* We know that the string "main" will be in the global shared string
3468 table, so it's a small saving to use it rather than allocate another
3470 PL_curstname = newSVpvs_share("main");
3471 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3472 /* If we hadn't caused another reference to "main" to be in the shared
3473 string table above, then it would be worth reordering these two,
3474 because otherwise all we do is delete "main" from it as a consequence
3475 of the SvREFCNT_dec, only to add it again with hv_name_set */
3476 SvREFCNT_dec(GvHV(gv));
3477 hv_name_set(PL_defstash, "main", 4, 0);
3478 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3480 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3482 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3483 GvMULTI_on(PL_incgv);
3484 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3485 GvMULTI_on(PL_hintgv);
3486 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3487 SvREFCNT_inc_simple_void(PL_defgv);
3488 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3489 SvREFCNT_inc_simple_void(PL_errgv);
3490 GvMULTI_on(PL_errgv);
3491 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3492 GvMULTI_on(PL_replgv);
3493 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3494 #ifdef PERL_DONT_CREATE_GVSV
3497 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3499 PL_curstash = PL_defstash;
3500 CopSTASH_set(&PL_compiling, PL_defstash);
3501 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3502 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3504 /* We must init $/ before switches are processed. */
3505 sv_setpvs(get_sv("/", GV_ADD), "\n");
3509 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3510 bool *suidscript, PerlIO **rsfpp)
3515 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3518 PL_origfilename = savepvs("-e");
3521 /* if find_script() returns, it returns a malloc()-ed value */
3522 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3524 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3525 const char *s = scriptname + 8;
3531 * Tell apart "normal" usage of fdscript, e.g.
3532 * with bash on FreeBSD:
3533 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3534 * from usage in suidperl.
3535 * Does any "normal" usage leave garbage after the number???
3536 * Is it a mistake to use a similar /dev/fd/ construct for
3541 * Be supersafe and do some sanity-checks.
3542 * Still, can we be sure we got the right thing?
3545 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3548 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3550 scriptname = savepv(s + 1);
3551 Safefree(PL_origfilename);
3552 PL_origfilename = (char *)scriptname;
3557 CopFILE_free(PL_curcop);
3558 CopFILE_set(PL_curcop, PL_origfilename);
3559 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3560 scriptname = (char *)"";
3561 if (fdscript >= 0) {
3562 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3563 # if defined(HAS_FCNTL) && defined(F_SETFD)
3565 /* ensure close-on-exec */
3566 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3569 else if (!*scriptname) {
3570 forbid_setid(0, *suidscript);
3571 *rsfpp = PerlIO_stdin();
3574 #ifdef FAKE_BIT_BUCKET
3575 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3576 * is called) and still have the "-e" work. (Believe it or not,
3577 * a /dev/null is required for the "-e" to work because source
3578 * filter magic is used to implement it. ) This is *not* a general
3579 * replacement for a /dev/null. What we do here is create a temp
3580 * file (an empty file), open up that as the script, and then
3581 * immediately close and unlink it. Close enough for jazz. */
3582 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3583 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3584 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3585 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3586 FAKE_BIT_BUCKET_TEMPLATE
3588 const char * const err = "Failed to create a fake bit bucket";
3589 if (strEQ(scriptname, BIT_BUCKET)) {
3590 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3591 int tmpfd = mkstemp(tmpname);
3593 scriptname = tmpname;
3596 Perl_croak(aTHX_ err);
3599 scriptname = mktemp(tmpname);
3601 Perl_croak(aTHX_ err);
3606 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3607 #ifdef FAKE_BIT_BUCKET
3608 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3609 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3610 && strlen(scriptname) == sizeof(tmpname) - 1) {
3613 scriptname = BIT_BUCKET;
3615 # if defined(HAS_FCNTL) && defined(F_SETFD)
3617 /* ensure close-on-exec */
3618 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3622 /* PSz 16 Sep 03 Keep neat error message */
3624 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3626 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3627 CopFILE(PL_curcop), Strerror(errno));
3633 * I_SYSSTATVFS HAS_FSTATVFS
3635 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3636 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3637 * here so that metaconfig picks them up. */
3640 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3641 /* Don't even need this function. */
3644 S_validate_suid(pTHX_ PerlIO *rsfp)
3646 PERL_ARGS_ASSERT_VALIDATE_SUID;
3648 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3651 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3652 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3654 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3657 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3658 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3659 /* not set-id, must be wrapped */
3662 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3665 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3669 register const char *s2;
3670 #ifdef MACOS_TRADITIONAL
3674 PERL_ARGS_ASSERT_FIND_BEGINNING;
3676 /* skip forward in input to the real script? */
3678 #ifdef MACOS_TRADITIONAL
3679 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
3681 while (PL_doextract || gMacPerl_AlwaysExtract) {
3682 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
3683 if (!gMacPerl_AlwaysExtract)
3684 Perl_croak(aTHX_ "No Perl script found in input\n");
3686 if (PL_doextract) /* require explicit override ? */
3687 if (!OverrideExtract(PL_origfilename))
3688 Perl_croak(aTHX_ "User aborted script\n");
3690 PL_doextract = FALSE;
3692 /* Pater peccavi, file does not have #! */
3693 PerlIO_rewind(rsfp);
3698 while (PL_doextract) {
3699 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3700 Perl_croak(aTHX_ "No Perl script found in input\n");
3703 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3704 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3705 PL_doextract = FALSE;
3706 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3708 while (*s == ' ' || *s == '\t') s++;
3710 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3711 || s2[-1] == '_') s2--;
3712 if (strnEQ(s2-4,"perl",4))
3713 while ((s = moreswitches(s)))
3716 #ifdef MACOS_TRADITIONAL
3717 /* We are always searching for the #!perl line in MacPerl,
3718 * so if we find it, still keep the line count correct
3719 * by counting lines we already skipped over
3721 for (; maclines > 0 ; maclines--)
3722 PerlIO_ungetc(rsfp, '\n');
3726 /* gMacPerl_AlwaysExtract is false in MPW tool */
3727 } else if (gMacPerl_AlwaysExtract) {
3739 PL_uid = PerlProc_getuid();
3740 PL_euid = PerlProc_geteuid();
3741 PL_gid = PerlProc_getgid();
3742 PL_egid = PerlProc_getegid();
3744 PL_uid |= PL_gid << 16;
3745 PL_euid |= PL_egid << 16;
3747 /* Should not happen: */
3748 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3749 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3752 * Should go by suidscript, not uid!=euid: why disallow
3753 * system("ls") in scripts run from setuid things?
3754 * Or, is this run before we check arguments and set suidscript?
3755 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3756 * (We never have suidscript, can we be sure to have fdscript?)
3757 * Or must then go by UID checks? See comments in forbid_setid also.
3761 /* This is used very early in the lifetime of the program,
3762 * before even the options are parsed, so PL_tainting has
3763 * not been initialized properly. */
3765 Perl_doing_taint(int argc, char *argv[], char *envp[])
3767 #ifndef PERL_IMPLICIT_SYS
3768 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3769 * before we have an interpreter-- and the whole point of this
3770 * function is to be called at such an early stage. If you are on
3771 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3772 * "tainted because running with altered effective ids', you'll
3773 * have to add your own checks somewhere in here. The two most
3774 * known samples of 'implicitness' are Win32 and NetWare, neither
3775 * of which has much of concept of 'uids'. */
3776 int uid = PerlProc_getuid();
3777 int euid = PerlProc_geteuid();
3778 int gid = PerlProc_getgid();
3779 int egid = PerlProc_getegid();
3786 if (uid && (euid != uid || egid != gid))
3788 #endif /* !PERL_IMPLICIT_SYS */
3789 /* This is a really primitive check; environment gets ignored only
3790 * if -T are the first chars together; otherwise one gets
3791 * "Too late" message. */
3792 if ( argc > 1 && argv[1][0] == '-'
3793 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3798 /* Passing the flag as a single char rather than a string is a slight space
3799 optimisation. The only message that isn't /^-.$/ is
3800 "program input from stdin", which is substituted in place of '\0', which
3801 could never be a command line flag. */
3803 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3806 char string[3] = "-x";
3807 const char *message = "program input from stdin";
3814 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3815 if (PL_euid != PL_uid)
3816 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3817 if (PL_egid != PL_gid)
3818 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3819 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3821 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3825 Perl_init_debugger(pTHX)
3828 HV * const ostash = PL_curstash;
3830 PL_curstash = PL_debstash;
3831 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3833 AvREAL_off(PL_dbargs);
3834 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3835 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3836 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3837 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3838 sv_setiv(PL_DBsingle, 0);
3839 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3840 sv_setiv(PL_DBtrace, 0);
3841 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3842 sv_setiv(PL_DBsignal, 0);
3843 PL_curstash = ostash;
3846 #ifndef STRESS_REALLOC
3847 #define REASONABLE(size) (size)
3849 #define REASONABLE(size) (1) /* unreasonable */
3853 Perl_init_stacks(pTHX)
3856 /* start with 128-item stack and 8K cxstack */
3857 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3858 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3859 PL_curstackinfo->si_type = PERLSI_MAIN;
3860 PL_curstack = PL_curstackinfo->si_stack;
3861 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3863 PL_stack_base = AvARRAY(PL_curstack);
3864 PL_stack_sp = PL_stack_base;
3865 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3867 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3870 PL_tmps_max = REASONABLE(128);
3872 Newx(PL_markstack,REASONABLE(32),I32);
3873 PL_markstack_ptr = PL_markstack;
3874 PL_markstack_max = PL_markstack + REASONABLE(32);
3878 Newx(PL_scopestack,REASONABLE(32),I32);
3879 PL_scopestack_ix = 0;
3880 PL_scopestack_max = REASONABLE(32);
3882 Newx(PL_savestack,REASONABLE(128),ANY);
3883 PL_savestack_ix = 0;
3884 PL_savestack_max = REASONABLE(128);
3893 while (PL_curstackinfo->si_next)
3894 PL_curstackinfo = PL_curstackinfo->si_next;
3895 while (PL_curstackinfo) {
3896 PERL_SI *p = PL_curstackinfo->si_prev;
3897 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3898 Safefree(PL_curstackinfo->si_cxstack);
3899 Safefree(PL_curstackinfo);
3900 PL_curstackinfo = p;
3902 Safefree(PL_tmps_stack);
3903 Safefree(PL_markstack);
3904 Safefree(PL_scopestack);
3905 Safefree(PL_savestack);
3910 S_init_predump_symbols(pTHX)
3916 sv_setpvs(get_sv("\"", GV_ADD), " ");
3917 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3919 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3920 GvMULTI_on(PL_stdingv);
3921 io = GvIOp(PL_stdingv);
3922 IoTYPE(io) = IoTYPE_RDONLY;
3923 IoIFP(io) = PerlIO_stdin();
3924 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3926 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3928 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3931 IoTYPE(io) = IoTYPE_WRONLY;
3932 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3934 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3936 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3938 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3939 GvMULTI_on(PL_stderrgv);
3940 io = GvIOp(PL_stderrgv);
3941 IoTYPE(io) = IoTYPE_WRONLY;
3942 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3943 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3945 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3947 PL_statname = newSV(0); /* last filename we did stat on */
3949 Safefree(PL_osname);
3950 PL_osname = savepv(OSNAME);
3954 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3958 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3960 argc--,argv++; /* skip name of script */
3961 if (PL_doswitches) {
3962 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3966 if (argv[0][1] == '-' && !argv[0][2]) {
3970 if ((s = strchr(argv[0], '='))) {
3971 const char *const start_name = argv[0] + 1;
3972 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3973 TRUE, SVt_PV)), s + 1);
3976 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3979 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3980 GvMULTI_on(PL_argvgv);
3981 (void)gv_AVadd(PL_argvgv);
3982 av_clear(GvAVn(PL_argvgv));
3983 for (; argc > 0; argc--,argv++) {
3984 SV * const sv = newSVpv(argv[0],0);
3985 av_push(GvAVn(PL_argvgv),sv);
3986 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3987 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3990 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3991 (void)sv_utf8_decode(sv);
3997 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4002 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4004 PL_toptarget = newSV_type(SVt_PVFM);
4005 sv_setpvs(PL_toptarget, "");
4006 PL_bodytarget = newSV_type(SVt_PVFM);
4007 sv_setpvs(PL_bodytarget, "");
4008 PL_formtarget = PL_bodytarget;
4012 init_argv_symbols(argc,argv);
4014 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4015 #ifdef MACOS_TRADITIONAL
4016 /* $0 is not majick on a Mac */
4017 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4019 sv_setpv(GvSV(tmpgv),PL_origfilename);
4021 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
4023 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
4027 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4029 bool env_is_not_environ;
4030 GvMULTI_on(PL_envgv);
4031 hv = GvHVn(PL_envgv);
4032 hv_magic(hv, NULL, PERL_MAGIC_env);
4034 #ifdef USE_ENVIRON_ARRAY
4035 /* Note that if the supplied env parameter is actually a copy
4036 of the global environ then it may now point to free'd memory
4037 if the environment has been modified since. To avoid this
4038 problem we treat env==NULL as meaning 'use the default'
4042 env_is_not_environ = env != environ;
4043 if (env_is_not_environ
4044 # ifdef USE_ITHREADS
4045 && PL_curinterp == aTHX
4054 for (; *env; env++) {
4057 if (!(s = strchr(old_var,'=')) || s == old_var)
4060 #if defined(MSDOS) && !defined(DJGPP)
4062 (void)strupr(old_var);
4065 sv = newSVpv(s+1, 0);
4066 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4067 if (env_is_not_environ)
4071 #endif /* USE_ENVIRON_ARRAY */
4072 #endif /* !PERL_MICRO */
4075 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4076 SvREADONLY_off(GvSV(tmpgv));
4077 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4078 SvREADONLY_on(GvSV(tmpgv));
4080 #ifdef THREADS_HAVE_PIDS
4081 PL_ppid = (IV)getppid();
4084 /* touch @F array to prevent spurious warnings 20020415 MJD */
4086 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4091 S_init_perllib(pTHX)
4097 s = PerlEnv_getenv("PERL5LIB");
4099 * It isn't possible to delete an environment variable with
4100 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4101 * case we treat PERL5LIB as undefined if it has a zero-length value.
4103 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4104 if (s && *s != '\0')
4108 incpush(s, TRUE, TRUE, TRUE, FALSE, FALSE);
4110 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE, FALSE);
4112 /* Treat PERL5?LIB as a possible search list logical name -- the
4113 * "natural" VMS idiom for a Unix path string. We allow each
4114 * element to be a set of |-separated directories for compatibility.
4118 if (my_trnlnm("PERL5LIB",buf,0))
4119 do { incpush(buf,TRUE,TRUE,TRUE,FALSE, FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4121 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE, FALSE);
4125 /* Use the ~-expanded versions of APPLLIB (undocumented),
4126 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4129 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE, FALSE);
4133 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4135 #ifdef MACOS_TRADITIONAL
4138 SV * privdir = newSV(0);
4139 char * macperl = PerlEnv_getenv("MACPERL");
4144 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4145 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4146 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4147 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4148 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4149 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE, FALSE);
4151 SvREFCNT_dec(privdir);
4154 incpush(":", FALSE, FALSE, FALSE, FALSE, FALSE);
4157 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4160 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4162 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4166 /* sitearch is always relative to sitelib on Windows for
4167 * DLL-based path intuition to work correctly */
4168 # if !defined(WIN32)
4169 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4175 /* this picks up sitearch as well */
4176 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE);
4178 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4182 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4183 /* Search for version-specific dirs below here */
4184 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4187 #ifdef PERL_VENDORARCH_EXP
4188 /* vendorarch is always relative to vendorlib on Windows for
4189 * DLL-based path intuition to work correctly */
4190 # if !defined(WIN32)
4191 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4195 #ifdef PERL_VENDORLIB_EXP
4197 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE, FALSE); /* this picks up vendorarch as well */
4199 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE, FALSE);
4203 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4204 /* Search for version-specific dirs below here */
4205 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE, FALSE);
4208 #ifdef PERL_OTHERLIBDIRS
4209 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE, FALSE);
4213 incpush(".", FALSE, FALSE, FALSE, FALSE, FALSE);
4214 #endif /* MACOS_TRADITIONAL */
4217 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4218 # define PERLLIB_SEP ';'
4221 # define PERLLIB_SEP '|'
4223 # if defined(MACOS_TRADITIONAL)
4224 # define PERLLIB_SEP ','
4226 # define PERLLIB_SEP ':'
4230 #ifndef PERLLIB_MANGLE
4231 # define PERLLIB_MANGLE(s,n) (s)
4234 /* Push a directory onto @INC if it exists.
4235 Generate a new SV if we do this, to save needing to copy the SV we push
4238 S_incpush_if_exists(pTHX_ AV *const av, SV *dir)
4243 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4245 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4246 S_ISDIR(tmpstatbuf.st_mode)) {
4254 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4255 bool canrelocate, bool unshift)
4259 const char *p = dir;
4265 inc = GvAVn(PL_incgv);
4267 if (addsubdirs || addoldvers) {
4271 /* Break at all separators */
4273 SV *libdir = newSV(0);
4275 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4276 arranged to unshift #! line -I onto the front of @INC. However,
4277 -I can add version and architecture specific libraries, and they
4278 need to go first. The old code assumed that it was always
4279 pushing. Hence to make it work, need to push the architecture
4280 (etc) libraries onto a temporary array, then "unshift" that onto
4281 the front of @INC. */
4283 = (addsubdirs || addoldvers) ? (unshift ? newAV() : inc) : NULL;
4285 /* skip any consecutive separators */
4287 while ( *p == PERLLIB_SEP ) {
4288 /* Uncomment the next line for PATH semantics */
4289 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4294 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4295 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4300 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4301 p = NULL; /* break out */
4303 #ifdef MACOS_TRADITIONAL
4304 if (!strchr(SvPVX(libdir), ':')) {
4307 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4309 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4310 sv_catpvs(libdir, ":");
4313 /* Do the if() outside the #ifdef to avoid warnings about an unused
4316 #ifdef PERL_RELOCATABLE_INC
4318 * Relocatable include entries are marked with a leading .../
4321 * 0: Remove that leading ".../"
4322 * 1: Remove trailing executable name (anything after the last '/')
4323 * from the perl path to give a perl prefix
4325 * While the @INC element starts "../" and the prefix ends with a real
4326 * directory (ie not . or ..) chop that real directory off the prefix
4327 * and the leading "../" from the @INC element. ie a logical "../"
4329 * Finally concatenate the prefix and the remainder of the @INC element
4330 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4331 * generates /usr/local/lib/perl5
4333 const char *libpath = SvPVX(libdir);
4334 STRLEN libpath_len = SvCUR(libdir);
4335 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4337 SV * const caret_X = get_sv("\030", 0);
4338 /* Going to use the SV just as a scratch buffer holding a C
4344 /* $^X is *the* source of taint if tainting is on, hence
4345 SvPOK() won't be true. */
4347 assert(SvPOKp(caret_X));
4348 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4350 /* Firstly take off the leading .../
4351 If all else fail we'll do the paths relative to the current
4353 sv_chop(libdir, libpath + 4);
4354 /* Don't use SvPV as we're intentionally bypassing taining,
4355 mortal copies that the mg_get of tainting creates, and
4356 corruption that seems to come via the save stack.
4357 I guess that the save stack isn't correctly set up yet. */
4358 libpath = SvPVX(libdir);
4359 libpath_len = SvCUR(libdir);
4361 /* This would work more efficiently with memrchr, but as it's
4362 only a GNU extension we'd need to probe for it and
4363 implement our own. Not hard, but maybe not worth it? */
4365 prefix = SvPVX(prefix_sv);
4366 lastslash = strrchr(prefix, '/');
4368 /* First time in with the *lastslash = '\0' we just wipe off
4369 the trailing /perl from (say) /usr/foo/bin/perl
4373 while ((*lastslash = '\0'), /* Do that, come what may. */
4374 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4375 && (lastslash = strrchr(prefix, '/')))) {
4376 if (lastslash[1] == '\0'
4377 || (lastslash[1] == '.'
4378 && (lastslash[2] == '/' /* ends "/." */
4379 || (lastslash[2] == '/'
4380 && lastslash[3] == '/' /* or "/.." */
4382 /* Prefix ends "/" or "/." or "/..", any of which
4383 are fishy, so don't do any more logical cleanup.
4387 /* Remove leading "../" from path */
4390 /* Next iteration round the loop removes the last
4391 directory name from prefix by writing a '\0' in
4392 the while clause. */
4394 /* prefix has been terminated with a '\0' to the correct
4395 length. libpath points somewhere into the libdir SV.
4396 We need to join the 2 with '/' and drop the result into
4398 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4399 SvREFCNT_dec(libdir);
4400 /* And this is the new libdir. */
4403 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4404 /* Need to taint reloccated paths if running set ID */
4405 SvTAINTED_on(libdir);
4408 SvREFCNT_dec(prefix_sv);
4413 * BEFORE pushing libdir onto @INC we may first push version- and
4414 * archname-specific sub-directories.
4416 if (addsubdirs || addoldvers) {
4417 #ifdef PERL_INC_VERSION_LIST
4418 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4419 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4420 const char * const *incver;
4426 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4428 while (unix[len-1] == '/') len--; /* Cosmetic */
4429 sv_usepvn(libdir,unix,len);
4432 PerlIO_printf(Perl_error_log,
4433 "Failed to unixify @INC element \"%s\"\n",
4437 #ifdef MACOS_TRADITIONAL
4438 #define PERL_AV_SUFFIX_FMT ""
4439 #define PERL_ARCH_FMT "%s:"
4440 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4442 #define PERL_AV_SUFFIX_FMT "/"
4443 #define PERL_ARCH_FMT "/%s"
4444 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4446 /* .../version/archname if -d .../version/archname */
4447 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4449 (int)PERL_REVISION, (int)PERL_VERSION,
4450 (int)PERL_SUBVERSION, ARCHNAME);
4451 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4453 /* .../version if -d .../version */
4454 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
4456 (int)PERL_REVISION, (int)PERL_VERSION,
4457 (int)PERL_SUBVERSION);
4458 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4460 /* .../archname if -d .../archname */
4461 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4462 SVfARG(libdir), ARCHNAME);
4463 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4467 #ifdef PERL_INC_VERSION_LIST
4469 for (incver = incverlist; *incver; incver++) {
4470 /* .../xxx if -d .../xxx */
4471 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4472 SVfARG(libdir), *incver);
4473 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4479 /* finally add this lib directory at the end of @INC */
4481 U32 extra = av_len(av) + 1;
4482 av_unshift(inc, extra + 1);
4483 av_store(inc, extra, libdir);
4485 /* av owns a reference, av_store() expects to be donated a
4486 reference, and av expects to be sane when it's cleared.
4487 If I wanted to be naughty and wrong, I could peek inside the
4488 implementation of av_clear(), realise that it uses
4489 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4490 and so directly steal from it (with a memcpy() to inc, and
4491 then memset() to NULL them out. But people copy code from the
4492 core expecting it to be best practise, so let's use the API.
4493 Although studious readers will note that I'm not checking any
4495 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4500 av_push(inc, libdir);
4504 assert (SvREFCNT(subdir) == 1);
4505 SvREFCNT_dec(subdir);
4511 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4515 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4521 PERL_ARGS_ASSERT_CALL_LIST;
4523 while (av_len(paramList) >= 0) {
4524 cv = MUTABLE_CV(av_shift(paramList));
4526 if (paramList == PL_beginav) {
4527 /* save PL_beginav for compiler */
4528 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4530 else if (paramList == PL_checkav) {
4531 /* save PL_checkav for compiler */
4532 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4534 else if (paramList == PL_unitcheckav) {
4535 /* save PL_unitcheckav for compiler */
4536 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4547 PL_madskills |= 16384;
4552 PL_madskills &= ~16384;
4555 (void)SvPV_const(atsv, len);
4557 PL_curcop = &PL_compiling;
4558 CopLINE_set(PL_curcop, oldline);
4559 if (paramList == PL_beginav)
4560 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4562 Perl_sv_catpvf(aTHX_ atsv,
4563 "%s failed--call queue aborted",
4564 paramList == PL_checkav ? "CHECK"
4565 : paramList == PL_initav ? "INIT"
4566 : paramList == PL_unitcheckav ? "UNITCHECK"
4568 while (PL_scopestack_ix > oldscope)
4571 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4578 /* my_exit() was called */
4579 while (PL_scopestack_ix > oldscope)
4582 PL_curstash = PL_defstash;
4583 PL_curcop = &PL_compiling;
4584 CopLINE_set(PL_curcop, oldline);
4586 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4587 if (paramList == PL_beginav)
4588 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4590 Perl_croak(aTHX_ "%s failed--call queue aborted",
4591 paramList == PL_checkav ? "CHECK"
4592 : paramList == PL_initav ? "INIT"
4593 : paramList == PL_unitcheckav ? "UNITCHECK"
4600 PL_curcop = &PL_compiling;
4601 CopLINE_set(PL_curcop, oldline);
4604 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4613 Perl_my_exit(pTHX_ U32 status)
4624 STATUS_EXIT_SET(status);
4631 Perl_my_failure_exit(pTHX)
4635 /* We have been called to fall on our sword. The desired exit code
4636 * should be already set in STATUS_UNIX, but could be shifted over
4637 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4640 * If an error code has not been set, then force the issue.
4642 if (MY_POSIX_EXIT) {
4644 /* According to the die_exit.t tests, if errno is non-zero */
4645 /* It should be used for the error status. */
4647 if (errno == EVMSERR) {
4648 STATUS_NATIVE = vaxc$errno;
4651 /* According to die_exit.t tests, if the child_exit code is */
4652 /* also zero, then we need to exit with a code of 255 */
4653 if ((errno != 0) && (errno < 256))
4654 STATUS_UNIX_EXIT_SET(errno);
4655 else if (STATUS_UNIX < 255) {
4656 STATUS_UNIX_EXIT_SET(255);
4661 /* The exit code could have been set by $? or vmsish which
4662 * means that it may not have fatal set. So convert
4663 * success/warning codes to fatal with out changing
4664 * the POSIX status code. The severity makes VMS native
4665 * status handling work, while UNIX mode programs use the
4666 * the POSIX exit codes.
4668 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4669 STATUS_NATIVE &= STS$M_COND_ID;
4670 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4674 /* Traditionally Perl on VMS always expects a Fatal Error. */
4675 if (vaxc$errno & 1) {
4677 /* So force success status to failure */
4678 if (STATUS_NATIVE & 1)
4683 STATUS_UNIX = EINTR; /* In case something cares */
4688 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4690 /* Encode the severity code */
4691 severity = STATUS_NATIVE & STS$M_SEVERITY;
4692 STATUS_UNIX = (severity ? severity : 1) << 8;
4694 /* Perl expects this to be a fatal error */
4695 if (severity != STS$K_SEVERE)
4704 STATUS_UNIX_SET(errno);
4706 exitstatus = STATUS_UNIX >> 8;
4707 if (exitstatus & 255)
4708 STATUS_UNIX_SET(exitstatus);
4710 STATUS_UNIX_SET(255);
4717 S_my_exit_jump(pTHX)
4722 SvREFCNT_dec(PL_e_script);
4726 POPSTACK_TO(PL_mainstack);
4734 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4737 const char * const p = SvPVX_const(PL_e_script);
4738 const char *nl = strchr(p, '\n');
4740 PERL_UNUSED_ARG(idx);
4741 PERL_UNUSED_ARG(maxlen);
4743 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4745 filter_del(read_e_script);
4748 sv_catpvn(buf_sv, p, nl-p);
4749 sv_chop(PL_e_script, nl);
4755 * c-indentation-style: bsd
4757 * indent-tabs-mode: t
4760 * ex: set ts=8 sts=4 sw=4 noet: