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");
1629 #define INCPUSH_ADD_SUB_DIRS 0x01
1630 #define INCPUSH_ADD_OLD_VERS 0x02
1631 #define INCPUSH_NOT_BASEDIR 0x04
1632 #define INCPUSH_CAN_RELOCATE 0x08
1633 #define INCPUSH_UNSHIFT 0x10
1636 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1640 int argc = PL_origargc;
1641 char **argv = PL_origargv;
1642 const char *scriptname = NULL;
1643 VOL bool dosearch = FALSE;
1646 const char *cddir = NULL;
1647 #ifdef USE_SITECUSTOMIZE
1648 bool minus_f = FALSE;
1650 SV *linestr_sv = newSV_type(SVt_PVIV);
1651 bool add_read_e_script = FALSE;
1653 SvGROW(linestr_sv, 80);
1654 sv_setpvs(linestr_sv,"");
1656 sv = newSVpvs(""); /* first used for -I flags */
1662 for (argc--,argv++; argc > 0; argc--,argv++) {
1663 if (argv[0][0] != '-' || !argv[0][1])
1669 #ifndef PERL_STRICT_CR
1693 if ((s = moreswitches(s)))
1698 CHECK_MALLOC_TOO_LATE_FOR('t');
1699 if( !PL_tainting ) {
1700 PL_taint_warn = TRUE;
1706 CHECK_MALLOC_TOO_LATE_FOR('T');
1708 PL_taint_warn = FALSE;
1716 #ifdef MACOS_TRADITIONAL
1717 /* ignore -e for Dev:Pseudo argument */
1718 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1721 forbid_setid('e', FALSE);
1723 PL_e_script = newSVpvs("");
1724 add_read_e_script = TRUE;
1727 sv_catpv(PL_e_script, s);
1729 sv_catpv(PL_e_script, argv[1]);
1733 Perl_croak(aTHX_ "No code specified for -%c", c);
1734 sv_catpvs(PL_e_script, "\n");
1738 #ifdef USE_SITECUSTOMIZE
1744 case 'I': /* -I handled both here and in moreswitches() */
1745 forbid_setid('I', FALSE);
1746 if (!*++s && (s=argv[1]) != NULL) {
1750 STRLEN len = strlen(s);
1751 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1752 sv_catpvs(sv, "-I");
1753 sv_catpvn(sv, s, len);
1757 Perl_croak(aTHX_ "No directory specified for -I");
1760 forbid_setid('S', FALSE);
1768 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1770 /* Can't do newSVpvs() as that would involve pre-processor
1771 condititionals inside a macro expansion. */
1772 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1779 # ifdef PERL_DONT_CREATE_GVSV
1780 " PERL_DONT_CREATE_GVSV"
1782 # ifdef PERL_MALLOC_WRAP
1785 # ifdef PERL_MEM_LOG
1788 # ifdef PERL_MEM_LOG_ENV
1791 # ifdef PERL_MEM_LOG_ENV_FD
1792 " PERL_MEM_LOG_ENV_FD"
1794 # ifdef PERL_MEM_LOG_STDERR
1795 " PERL_MEM_LOG_STDERR"
1797 # ifdef PERL_MEM_LOG_TIMESTAMP
1798 " PERL_MEM_LOG_TIMESTAMP"
1800 # ifdef PERL_USE_DEVEL
1803 # ifdef PERL_USE_SAFE_PUTENV
1804 " PERL_USE_SAFE_PUTENV"
1806 # ifdef USE_SITECUSTOMIZE
1807 " USE_SITECUSTOMIZE"
1809 # ifdef USE_FAST_STDIO
1814 sv_catpv(opts_prog, PL_bincompat_options);
1815 /* Terminate the qw(, and then wrap at 76 columns. */
1816 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1818 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1820 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1822 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1824 #if defined(LOCAL_PATCH_COUNT)
1825 if (LOCAL_PATCH_COUNT > 0) {
1827 sv_catpvs(opts_prog,
1828 "\" Locally applied patches:\\n\",");
1829 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1830 if (PL_localpatches[i])
1831 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1832 0, PL_localpatches[i], 0);
1836 Perl_sv_catpvf(aTHX_ opts_prog,
1837 "\" Built under %s\\n",OSNAME);
1840 sv_catpvs(opts_prog,
1841 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1843 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1846 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1847 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1848 "sort grep {/^PERL/} keys %ENV; ");
1850 sv_catpvs(opts_prog,
1851 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1853 sv_catpvs(opts_prog,
1854 "print \" \\%ENV:\\n @env\\n\" if @env;"
1855 "print \" \\@INC:\\n @INC\\n\";");
1859 opts_prog = Perl_newSVpvf(aTHX_
1860 "Config::config_vars(qw%c%s%c)",
1864 av_push(PL_preambleav, opts_prog);
1865 /* don't look for script or read stdin */
1866 scriptname = BIT_BUCKET;
1870 PL_doextract = TRUE;
1878 if (!*++s || isSPACE(*s)) {
1882 /* catch use of gnu style long options */
1883 if (strEQ(s, "version")) {
1887 if (strEQ(s, "help")) {
1894 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1905 #ifndef SECURE_INTERNAL_GETENV
1908 (s = PerlEnv_getenv("PERL5OPT")))
1912 if (*s == '-' && *(s+1) == 'T') {
1913 CHECK_MALLOC_TOO_LATE_FOR('T');
1915 PL_taint_warn = FALSE;
1918 char *popt_copy = NULL;
1931 if (!strchr("CDIMUdmtw", *s))
1932 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1936 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1937 s = popt_copy + (s - d);
1945 if( !PL_tainting ) {
1946 PL_taint_warn = TRUE;
1957 #ifdef USE_SITECUSTOMIZE
1959 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1960 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1965 scriptname = argv[0];
1968 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1970 else if (scriptname == NULL) {
1972 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1978 /* Set $^X early so that it can be used for relocatable paths in @INC */
1979 assert (!PL_tainted);
1981 S_set_caret_X(aTHX);
1984 init_perllib(INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
1987 bool suidscript = FALSE;
1989 open_script(scriptname, dosearch, &suidscript, &rsfp);
1991 validate_suid(validarg, scriptname, fdscript, suidscript,
1995 # if defined(SIGCHLD) || defined(SIGCLD)
1998 # define SIGCHLD SIGCLD
2000 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2001 if (sigstate == (Sighandler_t) SIG_IGN) {
2002 if (ckWARN(WARN_SIGNAL))
2003 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2004 "Can't ignore signal CHLD, forcing to default");
2005 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2012 #ifdef MACOS_TRADITIONAL
2013 || gMacPerl_AlwaysExtract
2017 /* This will croak if suidscript is true, as -x cannot be used with
2019 forbid_setid('x', suidscript);
2020 /* Hence you can't get here if suidscript is true */
2022 find_beginning(linestr_sv, rsfp);
2023 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2024 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2028 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2029 CvUNIQUE_on(PL_compcv);
2031 CvPADLIST(PL_compcv) = pad_new(0);
2033 PL_isarev = newHV();
2036 boot_core_UNIVERSAL();
2037 boot_core_xsutils();
2041 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2043 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2049 # ifdef HAS_SOCKS5_INIT
2050 socks5_init(argv[0]);
2056 init_predump_symbols();
2057 /* init_postdump_symbols not currently designed to be called */
2058 /* more than once (ENV isn't cleared first, for example) */
2059 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2061 init_postdump_symbols(argc,argv,env);
2063 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2064 * or explicitly in some platforms.
2065 * locale.c:Perl_init_i18nl10n() if the environment
2066 * look like the user wants to use UTF-8. */
2067 #if defined(__SYMBIAN32__)
2068 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2071 /* Requires init_predump_symbols(). */
2072 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2077 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2078 * and the default open disciplines. */
2079 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2080 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2082 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2083 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2084 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2086 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2087 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2088 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2090 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2091 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2092 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2094 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2095 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2098 sv_setpvs(sv, ":utf8\0:utf8");
2100 sv_setpvs(sv, ":utf8\0");
2103 sv_setpvs(sv, "\0:utf8");
2111 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2112 if (strEQ(s, "unsafe"))
2113 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2114 else if (strEQ(s, "safe"))
2115 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2117 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2124 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2128 PL_xmlfp = PerlIO_stdout();
2130 PL_xmlfp = PerlIO_open(s, "w");
2132 Perl_croak(aTHX_ "Can't open %s", s);
2134 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2140 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2141 PL_madskills = atoi(s);
2142 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2147 lex_start(linestr_sv, rsfp, TRUE);
2148 PL_subname = newSVpvs("main");
2150 if (add_read_e_script)
2151 filter_add(read_e_script, NULL);
2153 /* now parse the script */
2155 SETERRNO(0,SS_NORMAL);
2156 #ifdef MACOS_TRADITIONAL
2157 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2159 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2161 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2162 MacPerl_MPWFileName(PL_origfilename));
2166 if (yyparse() || PL_parser->error_count) {
2168 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2170 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2175 CopLINE_set(PL_curcop, 0);
2176 PL_curstash = PL_defstash;
2178 SvREFCNT_dec(PL_e_script);
2186 SAVECOPFILE(PL_curcop);
2187 SAVECOPLINE(PL_curcop);
2188 gv_check(PL_defstash);
2197 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2198 dump_mstats("after compilation:");
2208 =for apidoc perl_run
2210 Tells a Perl interpreter to run. See L<perlembed>.
2223 PERL_ARGS_ASSERT_PERL_RUN;
2224 #ifndef MULTIPLICITY
2225 PERL_UNUSED_ARG(my_perl);
2228 oldscope = PL_scopestack_ix;
2236 cxstack_ix = -1; /* start context stack again */
2238 case 0: /* normal completion */
2242 case 2: /* my_exit() */
2243 while (PL_scopestack_ix > oldscope)
2246 PL_curstash = PL_defstash;
2247 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2248 PL_endav && !PL_minus_c)
2249 call_list(oldscope, PL_endav);
2251 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2252 dump_mstats("after execution: ");
2258 POPSTACK_TO(PL_mainstack);
2261 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2272 S_run_body(pTHX_ I32 oldscope)
2275 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2276 PL_sawampersand ? "Enabling" : "Omitting"));
2278 if (!PL_restartop) {
2282 exit(0); /* less likely to core dump than my_exit(0) */
2285 DEBUG_x(dump_all());
2288 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2292 #ifdef MACOS_TRADITIONAL
2293 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2294 (gMacPerl_ErrorFormat ? "# " : ""),
2295 MacPerl_MPWFileName(PL_origfilename));
2297 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2301 if (PERLDB_SINGLE && PL_DBsingle)
2302 sv_setiv(PL_DBsingle, 1);
2304 call_list(oldscope, PL_initav);
2305 #ifdef PERL_DEBUG_READONLY_OPS
2306 Perl_pending_Slabs_to_ro(aTHX);
2313 PL_op = PL_restartop;
2317 else if (PL_main_start) {
2318 CvDEPTH(PL_main_cv) = 1;
2319 PL_op = PL_main_start;
2327 =head1 SV Manipulation Functions
2329 =for apidoc p||get_sv
2331 Returns the SV of the specified Perl scalar. C<flags> are passed to
2332 C<gv_fetchpv>. If C<GV_ADD> is set and the
2333 Perl variable does not exist then it will be created. If C<flags> is zero
2334 and the variable does not exist then NULL is returned.
2340 Perl_get_sv(pTHX_ const char *name, I32 flags)
2344 PERL_ARGS_ASSERT_GET_SV;
2346 gv = gv_fetchpv(name, flags, SVt_PV);
2353 =head1 Array Manipulation Functions
2355 =for apidoc p||get_av
2357 Returns the AV of the specified Perl array. C<flags> are passed to
2358 C<gv_fetchpv>. If C<GV_ADD> is set and the
2359 Perl variable does not exist then it will be created. If C<flags> is zero
2360 and the variable does not exist then NULL is returned.
2366 Perl_get_av(pTHX_ const char *name, I32 flags)
2368 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2370 PERL_ARGS_ASSERT_GET_AV;
2380 =head1 Hash Manipulation Functions
2382 =for apidoc p||get_hv
2384 Returns the HV of the specified Perl hash. C<flags> are passed to
2385 C<gv_fetchpv>. If C<GV_ADD> is set and the
2386 Perl variable does not exist then it will be created. If C<flags> is zero
2387 and the variable does not exist then NULL is returned.
2393 Perl_get_hv(pTHX_ const char *name, I32 flags)
2395 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2397 PERL_ARGS_ASSERT_GET_HV;
2407 =head1 CV Manipulation Functions
2409 =for apidoc p||get_cvn_flags
2411 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2412 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2413 exist then it will be declared (which has the same effect as saying
2414 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2415 then NULL is returned.
2417 =for apidoc p||get_cv
2419 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2425 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2427 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2428 /* XXX this is probably not what they think they're getting.
2429 * It has the same effect as "sub name;", i.e. just a forward
2432 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2434 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2435 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2436 return newSUB(start_subparse(FALSE, 0),
2437 newSVOP(OP_CONST, 0, sv),
2445 /* Nothing in core calls this now, but we can't replace it with a macro and
2446 move it to mathoms.c as a macro would evaluate name twice. */
2448 Perl_get_cv(pTHX_ const char *name, I32 flags)
2450 PERL_ARGS_ASSERT_GET_CV;
2452 return get_cvn_flags(name, strlen(name), flags);
2455 /* Be sure to refetch the stack pointer after calling these routines. */
2459 =head1 Callback Functions
2461 =for apidoc p||call_argv
2463 Performs a callback to the specified Perl sub. See L<perlcall>.
2469 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2471 /* See G_* flags in cop.h */
2472 /* null terminated arg list */
2477 PERL_ARGS_ASSERT_CALL_ARGV;
2482 mXPUSHs(newSVpv(*argv,0));
2487 return call_pv(sub_name, flags);
2491 =for apidoc p||call_pv
2493 Performs a callback to the specified Perl sub. See L<perlcall>.
2499 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2500 /* name of the subroutine */
2501 /* See G_* flags in cop.h */
2503 PERL_ARGS_ASSERT_CALL_PV;
2505 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2509 =for apidoc p||call_method
2511 Performs a callback to the specified Perl method. The blessed object must
2512 be on the stack. See L<perlcall>.
2518 Perl_call_method(pTHX_ const char *methname, I32 flags)
2519 /* name of the subroutine */
2520 /* See G_* flags in cop.h */
2522 PERL_ARGS_ASSERT_CALL_METHOD;
2524 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2527 /* May be called with any of a CV, a GV, or an SV containing the name. */
2529 =for apidoc p||call_sv
2531 Performs a callback to the Perl sub whose name is in the SV. See
2538 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2539 /* See G_* flags in cop.h */
2542 LOGOP myop; /* fake syntax tree node */
2547 bool oldcatch = CATCH_GET;
2549 OP* const oldop = PL_op;
2552 PERL_ARGS_ASSERT_CALL_SV;
2554 if (flags & G_DISCARD) {
2558 if (!(flags & G_WANT)) {
2559 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2564 Zero(&myop, 1, LOGOP);
2565 myop.op_next = NULL;
2566 if (!(flags & G_NOARGS))
2567 myop.op_flags |= OPf_STACKED;
2568 myop.op_flags |= OP_GIMME_REVERSE(flags);
2572 EXTEND(PL_stack_sp, 1);
2573 *++PL_stack_sp = sv;
2575 oldscope = PL_scopestack_ix;
2577 if (PERLDB_SUB && PL_curstash != PL_debstash
2578 /* Handle first BEGIN of -d. */
2579 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2580 /* Try harder, since this may have been a sighandler, thus
2581 * curstash may be meaningless. */
2582 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2583 && !(flags & G_NODEBUG))
2584 PL_op->op_private |= OPpENTERSUB_DB;
2586 if (flags & G_METHOD) {
2587 Zero(&method_op, 1, UNOP);
2588 method_op.op_next = PL_op;
2589 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2590 method_op.op_type = OP_METHOD;
2591 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2592 myop.op_type = OP_ENTERSUB;
2593 PL_op = (OP*)&method_op;
2596 if (!(flags & G_EVAL)) {
2598 CALL_BODY_SUB((OP*)&myop);
2599 retval = PL_stack_sp - (PL_stack_base + oldmark);
2600 CATCH_SET(oldcatch);
2603 myop.op_other = (OP*)&myop;
2605 create_eval_scope(flags|G_FAKINGEVAL);
2613 CALL_BODY_SUB((OP*)&myop);
2614 retval = PL_stack_sp - (PL_stack_base + oldmark);
2615 if (!(flags & G_KEEPERR)) {
2623 /* my_exit() was called */
2624 PL_curstash = PL_defstash;
2627 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2628 Perl_croak(aTHX_ "Callback called exit");
2633 PL_op = PL_restartop;
2637 PL_stack_sp = PL_stack_base + oldmark;
2638 if ((flags & G_WANT) == G_ARRAY)
2642 *++PL_stack_sp = &PL_sv_undef;
2647 if (PL_scopestack_ix > oldscope)
2648 delete_eval_scope();
2652 if (flags & G_DISCARD) {
2653 PL_stack_sp = PL_stack_base + oldmark;
2662 /* Eval a string. The G_EVAL flag is always assumed. */
2665 =for apidoc p||eval_sv
2667 Tells Perl to C<eval> the string in the SV.
2673 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2675 /* See G_* flags in cop.h */
2679 UNOP myop; /* fake syntax tree node */
2680 VOL I32 oldmark = SP - PL_stack_base;
2683 OP* const oldop = PL_op;
2686 PERL_ARGS_ASSERT_EVAL_SV;
2688 if (flags & G_DISCARD) {
2695 Zero(PL_op, 1, UNOP);
2696 EXTEND(PL_stack_sp, 1);
2697 *++PL_stack_sp = sv;
2699 if (!(flags & G_NOARGS))
2700 myop.op_flags = OPf_STACKED;
2701 myop.op_next = NULL;
2702 myop.op_type = OP_ENTEREVAL;
2703 myop.op_flags |= OP_GIMME_REVERSE(flags);
2704 if (flags & G_KEEPERR)
2705 myop.op_flags |= OPf_SPECIAL;
2707 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2708 * before a PUSHEVAL, which corrupts the stack after a croak */
2709 TAINT_PROPER("eval_sv()");
2715 CALL_BODY_EVAL((OP*)&myop);
2716 retval = PL_stack_sp - (PL_stack_base + oldmark);
2717 if (!(flags & G_KEEPERR)) {
2725 /* my_exit() was called */
2726 PL_curstash = PL_defstash;
2729 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2730 Perl_croak(aTHX_ "Callback called exit");
2735 PL_op = PL_restartop;
2739 PL_stack_sp = PL_stack_base + oldmark;
2740 if ((flags & G_WANT) == G_ARRAY)
2744 *++PL_stack_sp = &PL_sv_undef;
2750 if (flags & G_DISCARD) {
2751 PL_stack_sp = PL_stack_base + oldmark;
2761 =for apidoc p||eval_pv
2763 Tells Perl to C<eval> the given string and return an SV* result.
2769 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2773 SV* sv = newSVpv(p, 0);
2775 PERL_ARGS_ASSERT_EVAL_PV;
2777 eval_sv(sv, G_SCALAR);
2784 if (croak_on_error && SvTRUE(ERRSV)) {
2785 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2791 /* Require a module. */
2794 =head1 Embedding Functions
2796 =for apidoc p||require_pv
2798 Tells Perl to C<require> the file named by the string argument. It is
2799 analogous to the Perl code C<eval "require '$file'">. It's even
2800 implemented that way; consider using load_module instead.
2805 Perl_require_pv(pTHX_ const char *pv)
2811 PERL_ARGS_ASSERT_REQUIRE_PV;
2813 PUSHSTACKi(PERLSI_REQUIRE);
2815 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2816 eval_sv(sv_2mortal(sv), G_DISCARD);
2822 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2824 /* This message really ought to be max 23 lines.
2825 * Removed -h because the user already knows that option. Others? */
2827 static const char * const usage_msg[] = {
2828 "-0[octal] specify record separator (\\0, if no argument)",
2829 "-a autosplit mode with -n or -p (splits $_ into @F)",
2830 "-C[number/list] enables the listed Unicode features",
2831 "-c check syntax only (runs BEGIN and CHECK blocks)",
2832 "-d[:debugger] run program under debugger",
2833 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2834 "-e program one line of program (several -e's allowed, omit programfile)",
2835 "-E program like -e, but enables all optional features",
2836 "-f don't do $sitelib/sitecustomize.pl at startup",
2837 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2838 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2839 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2840 "-l[octal] enable line ending processing, specifies line terminator",
2841 "-[mM][-]module execute \"use/no module...\" before executing program",
2842 "-n assume \"while (<>) { ... }\" loop around program",
2843 "-p assume loop like -n but print line also, like sed",
2844 "-s enable rudimentary parsing for switches after programfile",
2845 "-S look for programfile using PATH environment variable",
2846 "-t enable tainting warnings",
2847 "-T enable tainting checks",
2848 "-u dump core after parsing program",
2849 "-U allow unsafe operations",
2850 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2851 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2852 "-w enable many useful warnings (RECOMMENDED)",
2853 "-W enable all warnings",
2854 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2855 "-X disable all warnings",
2859 const char * const *p = usage_msg;
2861 PERL_ARGS_ASSERT_USAGE;
2863 PerlIO_printf(PerlIO_stdout(),
2864 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2867 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2870 /* convert a string of -D options (or digits) into an int.
2871 * sets *s to point to the char after the options */
2875 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2877 static const char * const usage_msgd[] = {
2878 " Debugging flag values: (see also -d)",
2879 " p Tokenizing and parsing (with v, displays parse stack)",
2880 " s Stack snapshots (with v, displays all stacks)",
2881 " l Context (loop) stack processing",
2882 " t Trace execution",
2883 " o Method and overloading resolution",
2884 " c String/numeric conversions",
2885 " P Print profiling info, source file input state",
2886 " m Memory and SV allocation",
2887 " f Format processing",
2888 " r Regular expression parsing and execution",
2889 " x Syntax tree dump",
2890 " u Tainting checks",
2891 " H Hash dump -- usurps values()",
2892 " X Scratchpad allocation",
2895 " R Include reference counts of dumped variables (eg when using -Ds)",
2896 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2897 " v Verbose: use in conjunction with other flags",
2899 " A Consistency checks on internal structures",
2900 " q quiet - currently only suppresses the 'EXECUTING' message",
2905 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2908 /* if adding extra options, remember to update DEBUG_MASK */
2909 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2911 for (; isALNUM(**s); (*s)++) {
2912 const char * const d = strchr(debopts,**s);
2914 i |= 1 << (d - debopts);
2915 else if (ckWARN_d(WARN_DEBUGGING))
2916 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2917 "invalid option -D%c, use -D'' to see choices\n", **s);
2920 else if (isDIGIT(**s)) {
2922 for (; isALNUM(**s); (*s)++) ;
2924 else if (givehelp) {
2925 const char *const *p = usage_msgd;
2926 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2929 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2930 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2931 "-Dp not implemented on this platform\n");
2937 /* This routine handles any switches that can be given during run */
2940 Perl_moreswitches(pTHX_ const char *s)
2944 const char option = *s; /* used to remember option in -m/-M code */
2946 PERL_ARGS_ASSERT_MORESWITCHES;
2954 SvREFCNT_dec(PL_rs);
2955 if (s[1] == 'x' && s[2]) {
2956 const char *e = s+=2;
2962 flags = PERL_SCAN_SILENT_ILLDIGIT;
2963 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2964 if (s + numlen < e) {
2965 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2969 PL_rs = newSVpvs("");
2970 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2971 tmps = (U8*)SvPVX(PL_rs);
2972 uvchr_to_utf8(tmps, rschar);
2973 SvCUR_set(PL_rs, UNISKIP(rschar));
2978 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2979 if (rschar & ~((U8)~0))
2980 PL_rs = &PL_sv_undef;
2981 else if (!rschar && numlen >= 2)
2982 PL_rs = newSVpvs("");
2984 char ch = (char)rschar;
2985 PL_rs = newSVpvn(&ch, 1);
2988 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2993 PL_unicode = parse_unicode_opts( (const char **)&s );
2994 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3000 while (*s && !isSPACE(*s)) ++s;
3001 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3012 forbid_setid('d', FALSE);
3015 /* -dt indicates to the debugger that threads will be used */
3016 if (*s == 't' && !isALNUM(s[1])) {
3018 my_setenv("PERL5DB_THREADED", "1");
3021 /* The following permits -d:Mod to accepts arguments following an =
3022 in the fashion that -MSome::Mod does. */
3023 if (*s == ':' || *s == '=') {
3024 const char *start = ++s;
3025 const char *const end = s + strlen(s);
3026 SV * const sv = newSVpvs("use Devel::");
3028 /* We now allow -d:Module=Foo,Bar */
3029 while(isALNUM(*s) || *s==':') ++s;
3031 sv_catpvn(sv, start, end - start);
3033 sv_catpvn(sv, start, s-start);
3034 /* Don't use NUL as q// delimiter here, this string goes in the
3036 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3039 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3043 PL_perldb = PERLDB_ALL;
3050 forbid_setid('D', FALSE);
3052 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3053 #else /* !DEBUGGING */
3054 if (ckWARN_d(WARN_DEBUGGING))
3055 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3056 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3057 for (s++; isALNUM(*s); s++) ;
3062 usage(PL_origargv[0]);
3065 Safefree(PL_inplace);
3066 #if defined(__CYGWIN__) /* do backup extension automagically */
3067 if (*(s+1) == '\0') {
3068 PL_inplace = savepvs(".bak");
3071 #endif /* __CYGWIN__ */
3073 const char * const start = ++s;
3074 while (*s && !isSPACE(*s))
3077 PL_inplace = savepvn(start, s - start);
3081 if (*s == '-') /* Additional switches on #! line. */
3085 case 'I': /* -I handled both here and in parse_body() */
3086 forbid_setid('I', FALSE);
3088 while (*s && isSPACE(*s))
3093 /* ignore trailing spaces (possibly followed by other switches) */
3095 for (e = p; *e && !isSPACE(*e); e++) ;
3099 } while (*p && *p != '-');
3101 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3107 Perl_croak(aTHX_ "No directory specified for -I");
3113 SvREFCNT_dec(PL_ors_sv);
3119 PL_ors_sv = newSVpvs("\n");
3120 numlen = 3 + (*s == '0');
3121 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3125 if (RsPARA(PL_rs)) {
3126 PL_ors_sv = newSVpvs("\n\n");
3129 PL_ors_sv = newSVsv(PL_rs);
3134 forbid_setid('M', FALSE); /* XXX ? */
3137 forbid_setid('m', FALSE); /* XXX ? */
3142 const char *use = "use ";
3144 /* -M-foo == 'no foo' */
3145 /* Leading space on " no " is deliberate, to make both
3146 possibilities the same length. */
3147 if (*s == '-') { use = " no "; ++s; }
3148 sv = newSVpvn(use,4);
3150 /* We allow -M'Module qw(Foo Bar)' */
3151 while(isALNUM(*s) || *s==':') {
3160 Perl_croak(aTHX_ "Module name required with -%c option",
3163 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3164 "contains single ':'",
3165 (int)(s - start), start, option);
3166 end = s + strlen(s);
3168 sv_catpvn(sv, start, end - start);
3169 if (option == 'm') {
3171 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3172 sv_catpvs( sv, " ()");
3175 sv_catpvn(sv, start, s-start);
3176 /* Use NUL as q''-delimiter. */
3177 sv_catpvs(sv, " split(/,/,q\0");
3179 sv_catpvn(sv, s, end - s);
3180 sv_catpvs(sv, "\0)");
3183 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3186 Perl_croak(aTHX_ "Missing argument to -%c", option);
3197 forbid_setid('s', FALSE);
3198 PL_doswitches = TRUE;
3212 #ifdef MACOS_TRADITIONAL
3213 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3215 PL_do_undump = TRUE;
3223 if (!sv_derived_from(PL_patchlevel, "version"))
3224 upg_version(PL_patchlevel, TRUE);
3227 SV* level= vstringify(PL_patchlevel);
3228 #ifdef PERL_PATCHNUM
3229 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3230 SV *num = newSVpvs(PERL_PATCHNUM "*");
3232 SV *num = newSVpvs(PERL_PATCHNUM);
3235 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3236 SvREFCNT_dec(level);
3239 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3243 PerlIO_printf(PerlIO_stdout(),
3244 "\nThis is perl, %"SVf
3248 SvREFCNT_dec(level);
3251 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3252 PerlIO_printf(PerlIO_stdout(),
3253 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3254 SVfARG(vstringify(PL_patchlevel))));
3255 PerlIO_printf(PerlIO_stdout(),
3256 Perl_form(aTHX_ " built under %s at %s %s\n",
3257 OSNAME, __DATE__, __TIME__));
3258 PerlIO_printf(PerlIO_stdout(),
3259 Perl_form(aTHX_ " OS Specific Release: %s\n",
3262 #if defined(LOCAL_PATCH_COUNT)
3263 if (LOCAL_PATCH_COUNT > 0)
3264 PerlIO_printf(PerlIO_stdout(),
3265 "\n(with %d registered patch%s, "
3266 "see perl -V for more detail)",
3268 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3271 PerlIO_printf(PerlIO_stdout(),
3272 "\n\nCopyright 1987-2009, Larry Wall\n");
3273 #ifdef MACOS_TRADITIONAL
3274 PerlIO_printf(PerlIO_stdout(),
3275 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3276 "maintained by Chris Nandor\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3285 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3290 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "atariST series port, ++jrb bammi@cadence.com\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "MiNT port by Guido Flohr, 1997-1999\n");
3325 PerlIO_printf(PerlIO_stdout(),
3326 "EPOC port by Olaf Flebbe, 1999-2002\n");
3329 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3330 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3333 #ifdef __SYMBIAN32__
3334 PerlIO_printf(PerlIO_stdout(),
3335 "Symbian port by Nokia, 2004-2005\n");
3337 #ifdef BINARY_BUILD_NOTICE
3338 BINARY_BUILD_NOTICE;
3340 PerlIO_printf(PerlIO_stdout(),
3342 Perl may be copied only under the terms of either the Artistic License or the\n\
3343 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3344 Complete documentation for Perl, including FAQ lists, should be found on\n\
3345 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3346 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3349 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3350 PL_dowarn |= G_WARN_ON;
3355 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3356 if (!specialWARN(PL_compiling.cop_warnings))
3357 PerlMemShared_free(PL_compiling.cop_warnings);
3358 PL_compiling.cop_warnings = pWARN_ALL ;
3362 PL_dowarn = G_WARN_ALL_OFF;
3363 if (!specialWARN(PL_compiling.cop_warnings))
3364 PerlMemShared_free(PL_compiling.cop_warnings);
3365 PL_compiling.cop_warnings = pWARN_NONE ;
3372 if (s[0] == '-') /* Additional switches on #! line. */
3377 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3383 #ifdef ALTERNATE_SHEBANG
3384 case 'S': /* OS/2 needs -S on "extproc" line. */
3388 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3393 /* compliments of Tom Christiansen */
3395 /* unexec() can be found in the Gnu emacs distribution */
3396 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3399 Perl_my_unexec(pTHX)
3401 PERL_UNUSED_CONTEXT;
3403 SV * prog = newSVpv(BIN_EXP, 0);
3404 SV * file = newSVpv(PL_origfilename, 0);
3408 sv_catpvs(prog, "/perl");
3409 sv_catpvs(file, ".perldump");
3411 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3412 /* unexec prints msg to stderr in case of failure */
3413 PerlProc_exit(status);
3416 # include <lib$routines.h>
3417 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3418 # elif defined(WIN32) || defined(__CYGWIN__)
3419 Perl_croak(aTHX_ "dump is not supported");
3421 ABORT(); /* for use with undump */
3426 /* initialize curinterp */
3432 # define PERLVAR(var,type)
3433 # define PERLVARA(var,n,type)
3434 # if defined(PERL_IMPLICIT_CONTEXT)
3435 # define PERLVARI(var,type,init) aTHX->var = init;
3436 # define PERLVARIC(var,type,init) aTHX->var = init;
3438 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3439 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3441 # include "intrpvar.h"
3447 # define PERLVAR(var,type)
3448 # define PERLVARA(var,n,type)
3449 # define PERLVARI(var,type,init) PL_##var = init;
3450 # define PERLVARIC(var,type,init) PL_##var = init;
3451 # include "intrpvar.h"
3458 /* As these are inside a structure, PERLVARI isn't capable of initialising
3460 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3461 PL_reg_poscache = PL_reg_starttry = NULL;
3465 S_init_main_stash(pTHX)
3470 PL_curstash = PL_defstash = newHV();
3471 /* We know that the string "main" will be in the global shared string
3472 table, so it's a small saving to use it rather than allocate another
3474 PL_curstname = newSVpvs_share("main");
3475 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3476 /* If we hadn't caused another reference to "main" to be in the shared
3477 string table above, then it would be worth reordering these two,
3478 because otherwise all we do is delete "main" from it as a consequence
3479 of the SvREFCNT_dec, only to add it again with hv_name_set */
3480 SvREFCNT_dec(GvHV(gv));
3481 hv_name_set(PL_defstash, "main", 4, 0);
3482 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3484 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3486 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3487 GvMULTI_on(PL_incgv);
3488 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3489 GvMULTI_on(PL_hintgv);
3490 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3491 SvREFCNT_inc_simple_void(PL_defgv);
3492 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3493 SvREFCNT_inc_simple_void(PL_errgv);
3494 GvMULTI_on(PL_errgv);
3495 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3496 GvMULTI_on(PL_replgv);
3497 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3498 #ifdef PERL_DONT_CREATE_GVSV
3501 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3503 PL_curstash = PL_defstash;
3504 CopSTASH_set(&PL_compiling, PL_defstash);
3505 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3506 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3508 /* We must init $/ before switches are processed. */
3509 sv_setpvs(get_sv("/", GV_ADD), "\n");
3513 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3514 bool *suidscript, PerlIO **rsfpp)
3519 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3522 PL_origfilename = savepvs("-e");
3525 /* if find_script() returns, it returns a malloc()-ed value */
3526 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3528 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3529 const char *s = scriptname + 8;
3535 * Tell apart "normal" usage of fdscript, e.g.
3536 * with bash on FreeBSD:
3537 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3538 * from usage in suidperl.
3539 * Does any "normal" usage leave garbage after the number???
3540 * Is it a mistake to use a similar /dev/fd/ construct for
3545 * Be supersafe and do some sanity-checks.
3546 * Still, can we be sure we got the right thing?
3549 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3552 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3554 scriptname = savepv(s + 1);
3555 Safefree(PL_origfilename);
3556 PL_origfilename = (char *)scriptname;
3561 CopFILE_free(PL_curcop);
3562 CopFILE_set(PL_curcop, PL_origfilename);
3563 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3564 scriptname = (char *)"";
3565 if (fdscript >= 0) {
3566 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3567 # if defined(HAS_FCNTL) && defined(F_SETFD)
3569 /* ensure close-on-exec */
3570 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3573 else if (!*scriptname) {
3574 forbid_setid(0, *suidscript);
3575 *rsfpp = PerlIO_stdin();
3578 #ifdef FAKE_BIT_BUCKET
3579 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3580 * is called) and still have the "-e" work. (Believe it or not,
3581 * a /dev/null is required for the "-e" to work because source
3582 * filter magic is used to implement it. ) This is *not* a general
3583 * replacement for a /dev/null. What we do here is create a temp
3584 * file (an empty file), open up that as the script, and then
3585 * immediately close and unlink it. Close enough for jazz. */
3586 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3587 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3588 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3589 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3590 FAKE_BIT_BUCKET_TEMPLATE
3592 const char * const err = "Failed to create a fake bit bucket";
3593 if (strEQ(scriptname, BIT_BUCKET)) {
3594 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3595 int tmpfd = mkstemp(tmpname);
3597 scriptname = tmpname;
3600 Perl_croak(aTHX_ err);
3603 scriptname = mktemp(tmpname);
3605 Perl_croak(aTHX_ err);
3610 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3611 #ifdef FAKE_BIT_BUCKET
3612 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3613 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3614 && strlen(scriptname) == sizeof(tmpname) - 1) {
3617 scriptname = BIT_BUCKET;
3619 # if defined(HAS_FCNTL) && defined(F_SETFD)
3621 /* ensure close-on-exec */
3622 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3626 /* PSz 16 Sep 03 Keep neat error message */
3628 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3630 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3631 CopFILE(PL_curcop), Strerror(errno));
3637 * I_SYSSTATVFS HAS_FSTATVFS
3639 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3640 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3641 * here so that metaconfig picks them up. */
3644 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3645 /* Don't even need this function. */
3648 S_validate_suid(pTHX_ PerlIO *rsfp)
3650 PERL_ARGS_ASSERT_VALIDATE_SUID;
3652 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3655 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3656 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3658 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3661 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3662 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3663 /* not set-id, must be wrapped */
3666 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3669 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3673 register const char *s2;
3674 #ifdef MACOS_TRADITIONAL
3678 PERL_ARGS_ASSERT_FIND_BEGINNING;
3680 /* skip forward in input to the real script? */
3682 #ifdef MACOS_TRADITIONAL
3683 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
3685 while (PL_doextract || gMacPerl_AlwaysExtract) {
3686 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
3687 if (!gMacPerl_AlwaysExtract)
3688 Perl_croak(aTHX_ "No Perl script found in input\n");
3690 if (PL_doextract) /* require explicit override ? */
3691 if (!OverrideExtract(PL_origfilename))
3692 Perl_croak(aTHX_ "User aborted script\n");
3694 PL_doextract = FALSE;
3696 /* Pater peccavi, file does not have #! */
3697 PerlIO_rewind(rsfp);
3702 while (PL_doextract) {
3703 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3704 Perl_croak(aTHX_ "No Perl script found in input\n");
3707 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3708 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3709 PL_doextract = FALSE;
3710 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3712 while (*s == ' ' || *s == '\t') s++;
3714 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3715 || s2[-1] == '_') s2--;
3716 if (strnEQ(s2-4,"perl",4))
3717 while ((s = moreswitches(s)))
3720 #ifdef MACOS_TRADITIONAL
3721 /* We are always searching for the #!perl line in MacPerl,
3722 * so if we find it, still keep the line count correct
3723 * by counting lines we already skipped over
3725 for (; maclines > 0 ; maclines--)
3726 PerlIO_ungetc(rsfp, '\n');
3730 /* gMacPerl_AlwaysExtract is false in MPW tool */
3731 } else if (gMacPerl_AlwaysExtract) {
3743 PL_uid = PerlProc_getuid();
3744 PL_euid = PerlProc_geteuid();
3745 PL_gid = PerlProc_getgid();
3746 PL_egid = PerlProc_getegid();
3748 PL_uid |= PL_gid << 16;
3749 PL_euid |= PL_egid << 16;
3751 /* Should not happen: */
3752 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3753 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3756 * Should go by suidscript, not uid!=euid: why disallow
3757 * system("ls") in scripts run from setuid things?
3758 * Or, is this run before we check arguments and set suidscript?
3759 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3760 * (We never have suidscript, can we be sure to have fdscript?)
3761 * Or must then go by UID checks? See comments in forbid_setid also.
3765 /* This is used very early in the lifetime of the program,
3766 * before even the options are parsed, so PL_tainting has
3767 * not been initialized properly. */
3769 Perl_doing_taint(int argc, char *argv[], char *envp[])
3771 #ifndef PERL_IMPLICIT_SYS
3772 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3773 * before we have an interpreter-- and the whole point of this
3774 * function is to be called at such an early stage. If you are on
3775 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3776 * "tainted because running with altered effective ids', you'll
3777 * have to add your own checks somewhere in here. The two most
3778 * known samples of 'implicitness' are Win32 and NetWare, neither
3779 * of which has much of concept of 'uids'. */
3780 int uid = PerlProc_getuid();
3781 int euid = PerlProc_geteuid();
3782 int gid = PerlProc_getgid();
3783 int egid = PerlProc_getegid();
3790 if (uid && (euid != uid || egid != gid))
3792 #endif /* !PERL_IMPLICIT_SYS */
3793 /* This is a really primitive check; environment gets ignored only
3794 * if -T are the first chars together; otherwise one gets
3795 * "Too late" message. */
3796 if ( argc > 1 && argv[1][0] == '-'
3797 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3802 /* Passing the flag as a single char rather than a string is a slight space
3803 optimisation. The only message that isn't /^-.$/ is
3804 "program input from stdin", which is substituted in place of '\0', which
3805 could never be a command line flag. */
3807 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3810 char string[3] = "-x";
3811 const char *message = "program input from stdin";
3818 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3819 if (PL_euid != PL_uid)
3820 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3821 if (PL_egid != PL_gid)
3822 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3823 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3825 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3829 Perl_init_debugger(pTHX)
3832 HV * const ostash = PL_curstash;
3834 PL_curstash = PL_debstash;
3835 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3837 AvREAL_off(PL_dbargs);
3838 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3839 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3840 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3841 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3842 sv_setiv(PL_DBsingle, 0);
3843 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3844 sv_setiv(PL_DBtrace, 0);
3845 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3846 sv_setiv(PL_DBsignal, 0);
3847 PL_curstash = ostash;
3850 #ifndef STRESS_REALLOC
3851 #define REASONABLE(size) (size)
3853 #define REASONABLE(size) (1) /* unreasonable */
3857 Perl_init_stacks(pTHX)
3860 /* start with 128-item stack and 8K cxstack */
3861 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3862 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3863 PL_curstackinfo->si_type = PERLSI_MAIN;
3864 PL_curstack = PL_curstackinfo->si_stack;
3865 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3867 PL_stack_base = AvARRAY(PL_curstack);
3868 PL_stack_sp = PL_stack_base;
3869 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3871 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3874 PL_tmps_max = REASONABLE(128);
3876 Newx(PL_markstack,REASONABLE(32),I32);
3877 PL_markstack_ptr = PL_markstack;
3878 PL_markstack_max = PL_markstack + REASONABLE(32);
3882 Newx(PL_scopestack,REASONABLE(32),I32);
3883 PL_scopestack_ix = 0;
3884 PL_scopestack_max = REASONABLE(32);
3886 Newx(PL_savestack,REASONABLE(128),ANY);
3887 PL_savestack_ix = 0;
3888 PL_savestack_max = REASONABLE(128);
3897 while (PL_curstackinfo->si_next)
3898 PL_curstackinfo = PL_curstackinfo->si_next;
3899 while (PL_curstackinfo) {
3900 PERL_SI *p = PL_curstackinfo->si_prev;
3901 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3902 Safefree(PL_curstackinfo->si_cxstack);
3903 Safefree(PL_curstackinfo);
3904 PL_curstackinfo = p;
3906 Safefree(PL_tmps_stack);
3907 Safefree(PL_markstack);
3908 Safefree(PL_scopestack);
3909 Safefree(PL_savestack);
3914 S_init_predump_symbols(pTHX)
3920 sv_setpvs(get_sv("\"", GV_ADD), " ");
3921 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3923 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3924 GvMULTI_on(PL_stdingv);
3925 io = GvIOp(PL_stdingv);
3926 IoTYPE(io) = IoTYPE_RDONLY;
3927 IoIFP(io) = PerlIO_stdin();
3928 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3930 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3932 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3935 IoTYPE(io) = IoTYPE_WRONLY;
3936 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3938 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3940 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3942 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3943 GvMULTI_on(PL_stderrgv);
3944 io = GvIOp(PL_stderrgv);
3945 IoTYPE(io) = IoTYPE_WRONLY;
3946 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3947 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3949 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3951 PL_statname = newSV(0); /* last filename we did stat on */
3953 Safefree(PL_osname);
3954 PL_osname = savepv(OSNAME);
3958 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3962 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3964 argc--,argv++; /* skip name of script */
3965 if (PL_doswitches) {
3966 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3970 if (argv[0][1] == '-' && !argv[0][2]) {
3974 if ((s = strchr(argv[0], '='))) {
3975 const char *const start_name = argv[0] + 1;
3976 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3977 TRUE, SVt_PV)), s + 1);
3980 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3983 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3984 GvMULTI_on(PL_argvgv);
3985 (void)gv_AVadd(PL_argvgv);
3986 av_clear(GvAVn(PL_argvgv));
3987 for (; argc > 0; argc--,argv++) {
3988 SV * const sv = newSVpv(argv[0],0);
3989 av_push(GvAVn(PL_argvgv),sv);
3990 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3991 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3994 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3995 (void)sv_utf8_decode(sv);
4001 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4006 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4008 PL_toptarget = newSV_type(SVt_PVFM);
4009 sv_setpvs(PL_toptarget, "");
4010 PL_bodytarget = newSV_type(SVt_PVFM);
4011 sv_setpvs(PL_bodytarget, "");
4012 PL_formtarget = PL_bodytarget;
4016 init_argv_symbols(argc,argv);
4018 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4019 #ifdef MACOS_TRADITIONAL
4020 /* $0 is not majick on a Mac */
4021 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4023 sv_setpv(GvSV(tmpgv),PL_origfilename);
4025 GV * const gv = gv_fetchpv("0", GV_ADD, SVt_PV);
4027 sv_magic(GvSV(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, "0", 1);
4031 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4033 bool env_is_not_environ;
4034 GvMULTI_on(PL_envgv);
4035 hv = GvHVn(PL_envgv);
4036 hv_magic(hv, NULL, PERL_MAGIC_env);
4038 #ifdef USE_ENVIRON_ARRAY
4039 /* Note that if the supplied env parameter is actually a copy
4040 of the global environ then it may now point to free'd memory
4041 if the environment has been modified since. To avoid this
4042 problem we treat env==NULL as meaning 'use the default'
4046 env_is_not_environ = env != environ;
4047 if (env_is_not_environ
4048 # ifdef USE_ITHREADS
4049 && PL_curinterp == aTHX
4058 for (; *env; env++) {
4061 if (!(s = strchr(old_var,'=')) || s == old_var)
4064 #if defined(MSDOS) && !defined(DJGPP)
4066 (void)strupr(old_var);
4069 sv = newSVpv(s+1, 0);
4070 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4071 if (env_is_not_environ)
4075 #endif /* USE_ENVIRON_ARRAY */
4076 #endif /* !PERL_MICRO */
4079 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4080 SvREADONLY_off(GvSV(tmpgv));
4081 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4082 SvREADONLY_on(GvSV(tmpgv));
4084 #ifdef THREADS_HAVE_PIDS
4085 PL_ppid = (IV)getppid();
4088 /* touch @F array to prevent spurious warnings 20020415 MJD */
4090 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4095 S_init_perllib(pTHX_ U32 old_vers)
4101 s = PerlEnv_getenv("PERL5LIB");
4103 * It isn't possible to delete an environment variable with
4104 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4105 * case we treat PERL5LIB as undefined if it has a zero-length value.
4107 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4108 if (s && *s != '\0')
4112 incpush_use_sep(s, old_vers ? old_vers : INCPUSH_ADD_SUB_DIRS);
4114 incpush_use_sep(PerlEnv_getenv("PERLLIB"), 0);
4116 /* Treat PERL5?LIB as a possible search list logical name -- the
4117 * "natural" VMS idiom for a Unix path string. We allow each
4118 * element to be a set of |-separated directories for compatibility.
4122 if (my_trnlnm("PERL5LIB",buf,0))
4124 incpush_use_sep(buf, old_vers ? old_vers : INCPUSH_ADD_SUB_DIRS);
4125 } while (my_trnlnm("PERL5LIB",buf,++idx));
4127 while (my_trnlnm("PERLLIB",buf,idx++))
4128 incpush_use_sep(buf, 0);
4132 /* Use the ~-expanded versions of APPLLIB (undocumented),
4133 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4137 incpush_use_sep(APPLLIB_EXP, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4139 incpush_use_sep(APPLLIB_EXP, old_vers|INCPUSH_CAN_RELOCATE);
4145 incpush_use_sep(ARCHLIB_EXP, INCPUSH_CAN_RELOCATE);
4148 #ifdef MACOS_TRADITIONAL
4150 SV * privdir = newSV(0);
4151 char * macperl = PerlEnv_getenv("MACPERL");
4156 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4157 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4158 incpush_use_sep(SvPVX(privdir), INCPUSH_ADD_SUB_DIRS);
4159 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4160 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4161 incpush_use_sep(SvPVX(privdir), INCPUSH_ADD_SUB_DIRS);
4163 SvREFCNT_dec(privdir);
4165 S_incpush(aTHX_ STR_WITH_LEN(":"), 0);
4168 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4172 incpush_use_sep(PRIVLIB_EXP, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4174 incpush_use_sep(PRIVLIB_EXP, INCPUSH_CAN_RELOCATE);
4178 /* sitearch is always relative to sitelib on Windows for
4179 * DLL-based path intuition to work correctly */
4180 # if !defined(WIN32)
4181 incpush_use_sep(SITEARCH_EXP, INCPUSH_CAN_RELOCATE);
4187 /* this picks up sitearch as well */
4188 incpush_use_sep(SITELIB_EXP, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4190 incpush_use_sep(SITELIB_EXP, INCPUSH_CAN_RELOCATE);
4195 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4196 /* Search for version-specific dirs below here */
4197 incpush_use_sep(SITELIB_STEM, old_vers|INCPUSH_CAN_RELOCATE);
4201 #ifdef PERL_VENDORARCH_EXP
4202 /* vendorarch is always relative to vendorlib on Windows for
4203 * DLL-based path intuition to work correctly */
4204 # if !defined(WIN32)
4205 incpush_use_sep(PERL_VENDORARCH_EXP, INCPUSH_CAN_RELOCATE);
4209 #ifdef PERL_VENDORLIB_EXP
4211 /* this picks up vendorarch as well */
4212 incpush_use_sep(PERL_VENDORLIB_EXP,
4213 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4215 incpush_use_sep(PERL_VENDORLIB_EXP, INCPUSH_CAN_RELOCATE);
4220 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4221 /* Search for version-specific dirs below here */
4222 incpush_use_sep(PERL_VENDORLIB_STEM, old_vers|INCPUSH_CAN_RELOCATE);
4225 #ifdef PERL_OTHERLIBDIRS
4227 incpush_use_sep(PERL_OTHERLIBDIRS, INCPUSH_ADD_SUB_DIRS
4228 |INCPUSH_CAN_RELOCATE);
4230 incpush_use_sep(PERL_OTHERLIBDIRS, old_vers|INCPUSH_CAN_RELOCATE);
4234 /* old_vers should be true, so that this last of all. */
4235 if (!PL_tainting && old_vers)
4236 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4237 #endif /* MACOS_TRADITIONAL */
4240 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4241 # define PERLLIB_SEP ';'
4244 # define PERLLIB_SEP '|'
4246 # if defined(MACOS_TRADITIONAL)
4247 # define PERLLIB_SEP ','
4249 # define PERLLIB_SEP ':'
4253 #ifndef PERLLIB_MANGLE
4254 # define PERLLIB_MANGLE(s,n) (s)
4257 /* Push a directory onto @INC if it exists.
4258 Generate a new SV if we do this, to save needing to copy the SV we push
4261 S_incpush_if_exists(pTHX_ AV *const av, SV *dir)
4266 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4268 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4269 S_ISDIR(tmpstatbuf.st_mode)) {
4277 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4280 const U8 addsubdirs = flags & INCPUSH_ADD_SUB_DIRS;
4281 const U8 addoldvers = flags & INCPUSH_ADD_OLD_VERS;
4282 const U8 canrelocate = flags & INCPUSH_CAN_RELOCATE;
4283 const U8 unshift = flags & INCPUSH_UNSHIFT;
4284 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4291 inc = GvAVn(PL_incgv);
4293 if (addsubdirs || addoldvers) {
4299 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4300 arranged to unshift #! line -I onto the front of @INC. However,
4301 -I can add version and architecture specific libraries, and they
4302 need to go first. The old code assumed that it was always
4303 pushing. Hence to make it work, need to push the architecture
4304 (etc) libraries onto a temporary array, then "unshift" that onto
4305 the front of @INC. */
4307 = (addsubdirs || addoldvers) ? (unshift ? newAV() : inc) : NULL;
4310 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4311 defined to so something (in os2/os2.c), but the code has been
4312 this way, ignoring any possible changed of length, since
4313 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4315 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4317 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4320 #ifdef MACOS_TRADITIONAL
4321 if (!strchr(SvPVX(libdir), ':')) {
4324 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4326 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4327 sv_catpvs(libdir, ":");
4330 /* Do the if() outside the #ifdef to avoid warnings about an unused
4333 #ifdef PERL_RELOCATABLE_INC
4335 * Relocatable include entries are marked with a leading .../
4338 * 0: Remove that leading ".../"
4339 * 1: Remove trailing executable name (anything after the last '/')
4340 * from the perl path to give a perl prefix
4342 * While the @INC element starts "../" and the prefix ends with a real
4343 * directory (ie not . or ..) chop that real directory off the prefix
4344 * and the leading "../" from the @INC element. ie a logical "../"
4346 * Finally concatenate the prefix and the remainder of the @INC element
4347 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4348 * generates /usr/local/lib/perl5
4350 const char *libpath = SvPVX(libdir);
4351 STRLEN libpath_len = SvCUR(libdir);
4352 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4354 SV * const caret_X = get_sv("\030", 0);
4355 /* Going to use the SV just as a scratch buffer holding a C
4361 /* $^X is *the* source of taint if tainting is on, hence
4362 SvPOK() won't be true. */
4364 assert(SvPOKp(caret_X));
4365 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4367 /* Firstly take off the leading .../
4368 If all else fail we'll do the paths relative to the current
4370 sv_chop(libdir, libpath + 4);
4371 /* Don't use SvPV as we're intentionally bypassing taining,
4372 mortal copies that the mg_get of tainting creates, and
4373 corruption that seems to come via the save stack.
4374 I guess that the save stack isn't correctly set up yet. */
4375 libpath = SvPVX(libdir);
4376 libpath_len = SvCUR(libdir);
4378 /* This would work more efficiently with memrchr, but as it's
4379 only a GNU extension we'd need to probe for it and
4380 implement our own. Not hard, but maybe not worth it? */
4382 prefix = SvPVX(prefix_sv);
4383 lastslash = strrchr(prefix, '/');
4385 /* First time in with the *lastslash = '\0' we just wipe off
4386 the trailing /perl from (say) /usr/foo/bin/perl
4390 while ((*lastslash = '\0'), /* Do that, come what may. */
4391 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4392 && (lastslash = strrchr(prefix, '/')))) {
4393 if (lastslash[1] == '\0'
4394 || (lastslash[1] == '.'
4395 && (lastslash[2] == '/' /* ends "/." */
4396 || (lastslash[2] == '/'
4397 && lastslash[3] == '/' /* or "/.." */
4399 /* Prefix ends "/" or "/." or "/..", any of which
4400 are fishy, so don't do any more logical cleanup.
4404 /* Remove leading "../" from path */
4407 /* Next iteration round the loop removes the last
4408 directory name from prefix by writing a '\0' in
4409 the while clause. */
4411 /* prefix has been terminated with a '\0' to the correct
4412 length. libpath points somewhere into the libdir SV.
4413 We need to join the 2 with '/' and drop the result into
4415 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4416 SvREFCNT_dec(libdir);
4417 /* And this is the new libdir. */
4420 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4421 /* Need to taint reloccated paths if running set ID */
4422 SvTAINTED_on(libdir);
4425 SvREFCNT_dec(prefix_sv);
4430 * BEFORE pushing libdir onto @INC we may first push version- and
4431 * archname-specific sub-directories.
4433 if (addsubdirs || addoldvers) {
4434 #ifdef PERL_INC_VERSION_LIST
4435 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4436 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4437 const char * const *incver;
4443 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4445 while (unix[len-1] == '/') len--; /* Cosmetic */
4446 sv_usepvn(libdir,unix,len);
4449 PerlIO_printf(Perl_error_log,
4450 "Failed to unixify @INC element \"%s\"\n",
4454 #ifdef MACOS_TRADITIONAL
4455 #define PERL_AV_SUFFIX_FMT ""
4456 #define PERL_ARCH_FMT "%s:"
4457 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4459 #define PERL_AV_SUFFIX_FMT "/"
4460 #define PERL_ARCH_FMT "/%s"
4461 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4463 /* .../version/archname if -d .../version/archname */
4464 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4466 (int)PERL_REVISION, (int)PERL_VERSION,
4467 (int)PERL_SUBVERSION, ARCHNAME);
4468 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4470 /* .../version if -d .../version */
4471 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
4473 (int)PERL_REVISION, (int)PERL_VERSION,
4474 (int)PERL_SUBVERSION);
4475 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4477 /* .../archname if -d .../archname */
4478 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4479 SVfARG(libdir), ARCHNAME);
4480 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4484 #ifdef PERL_INC_VERSION_LIST
4486 for (incver = incverlist; *incver; incver++) {
4487 /* .../xxx if -d .../xxx */
4488 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4489 SVfARG(libdir), *incver);
4490 subdir = S_incpush_if_exists(aTHX_ av, subdir);
4496 /* finally add this lib directory at the end of @INC */
4498 U32 extra = av_len(av) + 1;
4499 av_unshift(inc, extra + push_basedir);
4501 av_store(inc, extra, libdir);
4503 /* av owns a reference, av_store() expects to be donated a
4504 reference, and av expects to be sane when it's cleared.
4505 If I wanted to be naughty and wrong, I could peek inside the
4506 implementation of av_clear(), realise that it uses
4507 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4508 and so directly steal from it (with a memcpy() to inc, and
4509 then memset() to NULL them out. But people copy code from the
4510 core expecting it to be best practise, so let's use the API.
4511 Although studious readers will note that I'm not checking any
4513 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4517 else if (push_basedir) {
4518 av_push(inc, libdir);
4521 if (!push_basedir) {
4522 assert (SvREFCNT(libdir) == 1);
4523 SvREFCNT_dec(libdir);
4527 assert (SvREFCNT(subdir) == 1);
4528 SvREFCNT_dec(subdir);
4533 S_incpush_use_sep(pTHX_ const char *p, U32 flags)
4535 /* This logic has been broken out from S_incpush(). It may be possible to
4538 /* Break at all separators */
4542 /* skip any consecutive separators */
4543 while ( *p == PERLLIB_SEP ) {
4544 /* Uncomment the next line for PATH semantics */
4545 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4549 if ((s = strchr(p, PERLLIB_SEP)) != NULL ) {
4550 incpush(p, (STRLEN)(s - p), flags);
4554 incpush(p, 0, flags);
4561 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4565 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4571 PERL_ARGS_ASSERT_CALL_LIST;
4573 while (av_len(paramList) >= 0) {
4574 cv = MUTABLE_CV(av_shift(paramList));
4576 if (paramList == PL_beginav) {
4577 /* save PL_beginav for compiler */
4578 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4580 else if (paramList == PL_checkav) {
4581 /* save PL_checkav for compiler */
4582 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4584 else if (paramList == PL_unitcheckav) {
4585 /* save PL_unitcheckav for compiler */
4586 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4597 PL_madskills |= 16384;
4602 PL_madskills &= ~16384;
4605 (void)SvPV_const(atsv, len);
4607 PL_curcop = &PL_compiling;
4608 CopLINE_set(PL_curcop, oldline);
4609 if (paramList == PL_beginav)
4610 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4612 Perl_sv_catpvf(aTHX_ atsv,
4613 "%s failed--call queue aborted",
4614 paramList == PL_checkav ? "CHECK"
4615 : paramList == PL_initav ? "INIT"
4616 : paramList == PL_unitcheckav ? "UNITCHECK"
4618 while (PL_scopestack_ix > oldscope)
4621 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4628 /* my_exit() was called */
4629 while (PL_scopestack_ix > oldscope)
4632 PL_curstash = PL_defstash;
4633 PL_curcop = &PL_compiling;
4634 CopLINE_set(PL_curcop, oldline);
4636 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4637 if (paramList == PL_beginav)
4638 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4640 Perl_croak(aTHX_ "%s failed--call queue aborted",
4641 paramList == PL_checkav ? "CHECK"
4642 : paramList == PL_initav ? "INIT"
4643 : paramList == PL_unitcheckav ? "UNITCHECK"
4650 PL_curcop = &PL_compiling;
4651 CopLINE_set(PL_curcop, oldline);
4654 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4663 Perl_my_exit(pTHX_ U32 status)
4674 STATUS_EXIT_SET(status);
4681 Perl_my_failure_exit(pTHX)
4685 /* We have been called to fall on our sword. The desired exit code
4686 * should be already set in STATUS_UNIX, but could be shifted over
4687 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4690 * If an error code has not been set, then force the issue.
4692 if (MY_POSIX_EXIT) {
4694 /* According to the die_exit.t tests, if errno is non-zero */
4695 /* It should be used for the error status. */
4697 if (errno == EVMSERR) {
4698 STATUS_NATIVE = vaxc$errno;
4701 /* According to die_exit.t tests, if the child_exit code is */
4702 /* also zero, then we need to exit with a code of 255 */
4703 if ((errno != 0) && (errno < 256))
4704 STATUS_UNIX_EXIT_SET(errno);
4705 else if (STATUS_UNIX < 255) {
4706 STATUS_UNIX_EXIT_SET(255);
4711 /* The exit code could have been set by $? or vmsish which
4712 * means that it may not have fatal set. So convert
4713 * success/warning codes to fatal with out changing
4714 * the POSIX status code. The severity makes VMS native
4715 * status handling work, while UNIX mode programs use the
4716 * the POSIX exit codes.
4718 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4719 STATUS_NATIVE &= STS$M_COND_ID;
4720 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4724 /* Traditionally Perl on VMS always expects a Fatal Error. */
4725 if (vaxc$errno & 1) {
4727 /* So force success status to failure */
4728 if (STATUS_NATIVE & 1)
4733 STATUS_UNIX = EINTR; /* In case something cares */
4738 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4740 /* Encode the severity code */
4741 severity = STATUS_NATIVE & STS$M_SEVERITY;
4742 STATUS_UNIX = (severity ? severity : 1) << 8;
4744 /* Perl expects this to be a fatal error */
4745 if (severity != STS$K_SEVERE)
4754 STATUS_UNIX_SET(errno);
4756 exitstatus = STATUS_UNIX >> 8;
4757 if (exitstatus & 255)
4758 STATUS_UNIX_SET(exitstatus);
4760 STATUS_UNIX_SET(255);
4767 S_my_exit_jump(pTHX)
4772 SvREFCNT_dec(PL_e_script);
4776 POPSTACK_TO(PL_mainstack);
4784 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4787 const char * const p = SvPVX_const(PL_e_script);
4788 const char *nl = strchr(p, '\n');
4790 PERL_UNUSED_ARG(idx);
4791 PERL_UNUSED_ARG(maxlen);
4793 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4795 filter_del(read_e_script);
4798 sv_catpvn(buf_sv, p, nl-p);
4799 sv_chop(PL_e_script, nl);
4805 * c-indentation-style: bsd
4807 * indent-tabs-mode: t
4810 * ex: set ts=8 sts=4 sw=4 noet: