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 */
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 = newSVpvs("v" PERL_VERSION_STRING);
353 if (!PL_mmap_page_size) {
354 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
356 SETERRNO(0, SS_NORMAL);
358 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
360 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
362 if ((long) PL_mmap_page_size < 0) {
364 SV * const error = ERRSV;
365 SvUPGRADE(error, SVt_PV);
366 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
369 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 # ifdef HAS_GETPAGESIZE
374 PL_mmap_page_size = getpagesize();
376 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
377 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 if (PL_mmap_page_size <= 0)
382 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
383 (IV) PL_mmap_page_size);
385 #endif /* HAS_MMAP */
387 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
388 PL_timesbase.tms_utime = 0;
389 PL_timesbase.tms_stime = 0;
390 PL_timesbase.tms_cutime = 0;
391 PL_timesbase.tms_cstime = 0;
394 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
396 PL_registered_mros = newHV();
397 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
398 HvMAX(PL_registered_mros) = 0;
404 =for apidoc nothreadhook
406 Stub that provides thread hook for perl_destruct when there are
413 Perl_nothreadhook(pTHX)
419 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
421 Perl_dump_sv_child(pTHX_ SV *sv)
424 const int sock = PL_dumper_fd;
425 const int debug_fd = PerlIO_fileno(Perl_debug_log);
426 union control_un control;
429 struct cmsghdr *cmptr;
431 unsigned char buffer[256];
433 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
435 if(sock == -1 || debug_fd == -1)
438 PerlIO_flush(Perl_debug_log);
440 /* All these shenanigans are to pass a file descriptor over to our child for
441 it to dump out to. We can't let it hold open the file descriptor when it
442 forks, as the file descriptor it will dump to can turn out to be one end
443 of pipe that some other process will wait on for EOF. (So as it would
444 be open, the wait would be forever.) */
446 msg.msg_control = control.control;
447 msg.msg_controllen = sizeof(control.control);
448 /* We're a connected socket so we don't need a destination */
454 cmptr = CMSG_FIRSTHDR(&msg);
455 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
456 cmptr->cmsg_level = SOL_SOCKET;
457 cmptr->cmsg_type = SCM_RIGHTS;
458 *((int *)CMSG_DATA(cmptr)) = 1;
460 vec[0].iov_base = (void*)&sv;
461 vec[0].iov_len = sizeof(sv);
462 got = sendmsg(sock, &msg, 0);
465 perror("Debug leaking scalars parent sendmsg failed");
468 if(got < sizeof(sv)) {
469 perror("Debug leaking scalars parent short sendmsg");
473 /* Return protocol is
475 unsigned char: length of location string (0 for empty)
476 unsigned char*: string (not terminated)
478 vec[0].iov_base = (void*)&returned_errno;
479 vec[0].iov_len = sizeof(returned_errno);
480 vec[1].iov_base = buffer;
483 got = readv(sock, vec, 2);
486 perror("Debug leaking scalars parent read failed");
487 PerlIO_flush(PerlIO_stderr());
490 if(got < sizeof(returned_errno) + 1) {
491 perror("Debug leaking scalars parent short read");
492 PerlIO_flush(PerlIO_stderr());
497 got = read(sock, buffer + 1, *buffer);
499 perror("Debug leaking scalars parent read 2 failed");
500 PerlIO_flush(PerlIO_stderr());
505 perror("Debug leaking scalars parent short read 2");
506 PerlIO_flush(PerlIO_stderr());
511 if (returned_errno || *buffer) {
512 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
513 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
514 returned_errno, strerror(returned_errno));
520 =for apidoc perl_destruct
522 Shuts down a Perl interpreter. See L<perlembed>.
531 VOL signed char destruct_level; /* see possible values in intrpvar.h */
533 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
537 PERL_ARGS_ASSERT_PERL_DESTRUCT;
539 PERL_UNUSED_ARG(my_perl);
542 /* wait for all pseudo-forked children to finish */
543 PERL_WAIT_FOR_CHILDREN;
545 destruct_level = PL_perl_destruct_level;
548 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
550 const int i = atoi(s);
551 if (destruct_level < i)
557 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
563 if (PL_endav && !PL_minus_c)
564 call_list(PL_scopestack_ix, PL_endav);
570 /* Need to flush since END blocks can produce output */
573 if (CALL_FPTR(PL_threadhook)(aTHX)) {
574 /* Threads hook has vetoed further cleanup */
575 PL_veto_cleanup = TRUE;
579 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
580 if (destruct_level != 0) {
581 /* Fork here to create a child. Our child's job is to preserve the
582 state of scalars prior to destruction, so that we can instruct it
583 to dump any scalars that we later find have leaked.
584 There's no subtlety in this code - it assumes POSIX, and it doesn't
588 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
589 perror("Debug leaking scalars socketpair failed");
595 perror("Debug leaking scalars fork failed");
599 /* We are the child */
600 const int sock = fd[1];
601 const int debug_fd = PerlIO_fileno(Perl_debug_log);
604 /* Our success message is an integer 0, and a char 0 */
605 static const char success[sizeof(int) + 1] = {0};
609 /* We need to close all other file descriptors otherwise we end up
610 with interesting hangs, where the parent closes its end of a
611 pipe, and sits waiting for (another) child to terminate. Only
612 that child never terminates, because it never gets EOF, because
613 we also have the far end of the pipe open. We even need to
614 close the debugging fd, because sometimes it happens to be one
615 end of a pipe, and a process is waiting on the other end for
616 EOF. Normally it would be closed at some point earlier in
617 destruction, but if we happen to cause the pipe to remain open,
618 EOF never occurs, and we get an infinite hang. Hence all the
619 games to pass in a file descriptor if it's actually needed. */
621 f = sysconf(_SC_OPEN_MAX);
623 where = "sysconf failed";
634 union control_un control;
637 struct cmsghdr *cmptr;
641 msg.msg_control = control.control;
642 msg.msg_controllen = sizeof(control.control);
643 /* We're a connected socket so we don't need a source */
647 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
649 vec[0].iov_base = (void*)⌖
650 vec[0].iov_len = sizeof(target);
652 got = recvmsg(sock, &msg, 0);
657 where = "recv failed";
660 if(got < sizeof(target)) {
661 where = "short recv";
665 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
669 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
670 where = "wrong cmsg_len";
673 if(cmptr->cmsg_level != SOL_SOCKET) {
674 where = "wrong cmsg_level";
677 if(cmptr->cmsg_type != SCM_RIGHTS) {
678 where = "wrong cmsg_type";
682 got_fd = *(int*)CMSG_DATA(cmptr);
683 /* For our last little bit of trickery, put the file descriptor
684 back into Perl_debug_log, as if we never actually closed it
686 if(got_fd != debug_fd) {
687 if (dup2(got_fd, debug_fd) == -1) {
694 PerlIO_flush(Perl_debug_log);
696 got = write(sock, &success, sizeof(success));
699 where = "write failed";
702 if(got < sizeof(success)) {
703 where = "short write";
710 int send_errno = errno;
711 unsigned char length = (unsigned char) strlen(where);
712 struct iovec failure[3] = {
713 {(void*)&send_errno, sizeof(send_errno)},
715 {(void*)where, length}
717 int got = writev(sock, failure, 3);
718 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
719 in the parent if we try to read from the socketpair after the
720 child has exited, even if there was data to read.
721 So sleep a bit to give the parent a fighting chance of
724 _exit((got == -1) ? errno : 0);
728 PL_dumper_fd = fd[0];
733 /* We must account for everything. */
735 /* Destroy the main CV and syntax tree */
736 /* Do this now, because destroying ops can cause new SVs to be generated
737 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
738 PL_curcop to point to a valid op from which the filename structure
740 PL_curcop = &PL_compiling;
742 /* ensure comppad/curpad to refer to main's pad */
743 if (CvPADLIST(PL_main_cv)) {
744 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
746 op_free(PL_main_root);
749 PL_main_start = NULL;
750 SvREFCNT_dec(PL_main_cv);
754 /* Tell PerlIO we are about to tear things apart in case
755 we have layers which are using resources that should
759 PerlIO_destruct(aTHX);
761 if (PL_sv_objcount) {
763 * Try to destruct global references. We do this first so that the
764 * destructors and destructees still exist. Some sv's might remain.
765 * Non-referenced objects are on their own.
769 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
770 PL_defoutgv = NULL; /* may have been freed */
773 /* unhook hooks which will soon be, or use, destroyed data */
774 SvREFCNT_dec(PL_warnhook);
776 SvREFCNT_dec(PL_diehook);
779 /* call exit list functions */
780 while (PL_exitlistlen-- > 0)
781 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
783 Safefree(PL_exitlist);
788 SvREFCNT_dec(PL_registered_mros);
790 /* jettison our possibly duplicated environment */
791 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
792 * so we certainly shouldn't free it here
795 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
796 if (environ != PL_origenviron && !PL_use_safe_putenv
798 /* only main thread can free environ[0] contents */
799 && PL_curinterp == aTHX
805 for (i = 0; environ[i]; i++)
806 safesysfree(environ[i]);
808 /* Must use safesysfree() when working with environ. */
809 safesysfree(environ);
811 environ = PL_origenviron;
814 #endif /* !PERL_MICRO */
816 if (destruct_level == 0) {
818 DEBUG_P(debprofdump());
820 #if defined(PERLIO_LAYERS)
821 /* No more IO - including error messages ! */
822 PerlIO_cleanup(aTHX);
825 CopFILE_free(&PL_compiling);
826 CopSTASH_free(&PL_compiling);
828 /* The exit() function will do everything that needs doing. */
832 /* reset so print() ends up where we expect */
836 /* the syntax tree is shared between clones
837 * so op_free(PL_main_root) only ReREFCNT_dec's
838 * REGEXPs in the parent interpreter
839 * we need to manually ReREFCNT_dec for the clones
841 SvREFCNT_dec(PL_regex_padav);
842 PL_regex_padav = NULL;
846 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
847 PL_stashcache = NULL;
849 /* loosen bonds of global variables */
851 /* XXX can PL_parser still be non-null here? */
852 if(PL_parser && PL_parser->rsfp) {
853 (void)PerlIO_close(PL_parser->rsfp);
854 PL_parser->rsfp = NULL;
858 Safefree(PL_splitstr);
868 PL_doswitches = FALSE;
869 PL_dowarn = G_WARN_OFF;
870 PL_doextract = FALSE;
871 PL_sawampersand = FALSE; /* must save all match strings */
874 Safefree(PL_inplace);
876 SvREFCNT_dec(PL_patchlevel);
879 SvREFCNT_dec(PL_e_script);
885 /* magical thingies */
887 SvREFCNT_dec(PL_ofsgv); /* *, */
890 SvREFCNT_dec(PL_ors_sv); /* $\ */
893 SvREFCNT_dec(PL_rs); /* $/ */
896 Safefree(PL_osname); /* $^O */
899 SvREFCNT_dec(PL_statname);
903 /* defgv, aka *_ should be taken care of elsewhere */
905 /* clean up after study() */
906 SvREFCNT_dec(PL_lastscream);
907 PL_lastscream = NULL;
908 Safefree(PL_screamfirst);
910 Safefree(PL_screamnext);
914 Safefree(PL_efloatbuf);
918 /* startup and shutdown function lists */
919 SvREFCNT_dec(PL_beginav);
920 SvREFCNT_dec(PL_beginav_save);
921 SvREFCNT_dec(PL_endav);
922 SvREFCNT_dec(PL_checkav);
923 SvREFCNT_dec(PL_checkav_save);
924 SvREFCNT_dec(PL_unitcheckav);
925 SvREFCNT_dec(PL_unitcheckav_save);
926 SvREFCNT_dec(PL_initav);
928 PL_beginav_save = NULL;
931 PL_checkav_save = NULL;
932 PL_unitcheckav = NULL;
933 PL_unitcheckav_save = NULL;
936 /* shortcuts just get cleared */
945 PL_last_in_gv = NULL;
957 SvREFCNT_dec(PL_argvout_stack);
958 PL_argvout_stack = NULL;
960 SvREFCNT_dec(PL_modglobal);
962 SvREFCNT_dec(PL_preambleav);
963 PL_preambleav = NULL;
964 SvREFCNT_dec(PL_subname);
966 #ifdef PERL_USES_PL_PIDSTATUS
967 SvREFCNT_dec(PL_pidstatus);
970 SvREFCNT_dec(PL_toptarget);
972 SvREFCNT_dec(PL_bodytarget);
973 PL_bodytarget = NULL;
974 PL_formtarget = NULL;
976 /* free locale stuff */
977 #ifdef USE_LOCALE_COLLATE
978 Safefree(PL_collation_name);
979 PL_collation_name = NULL;
982 #ifdef USE_LOCALE_NUMERIC
983 Safefree(PL_numeric_name);
984 PL_numeric_name = NULL;
985 SvREFCNT_dec(PL_numeric_radix_sv);
986 PL_numeric_radix_sv = NULL;
989 /* clear utf8 character classes */
990 SvREFCNT_dec(PL_utf8_alnum);
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_ascii = NULL;
1011 PL_utf8_alpha = NULL;
1012 PL_utf8_space = NULL;
1013 PL_utf8_cntrl = NULL;
1014 PL_utf8_graph = NULL;
1015 PL_utf8_digit = NULL;
1016 PL_utf8_upper = NULL;
1017 PL_utf8_lower = NULL;
1018 PL_utf8_print = NULL;
1019 PL_utf8_punct = NULL;
1020 PL_utf8_xdigit = NULL;
1021 PL_utf8_mark = NULL;
1022 PL_utf8_toupper = NULL;
1023 PL_utf8_totitle = NULL;
1024 PL_utf8_tolower = NULL;
1025 PL_utf8_tofold = NULL;
1026 PL_utf8_idstart = NULL;
1027 PL_utf8_idcont = NULL;
1029 if (!specialWARN(PL_compiling.cop_warnings))
1030 PerlMemShared_free(PL_compiling.cop_warnings);
1031 PL_compiling.cop_warnings = NULL;
1032 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1033 PL_compiling.cop_hints_hash = NULL;
1034 CopFILE_free(&PL_compiling);
1035 CopSTASH_free(&PL_compiling);
1037 /* Prepare to destruct main symbol table. */
1042 SvREFCNT_dec(PL_curstname);
1043 PL_curstname = NULL;
1045 /* clear queued errors */
1046 SvREFCNT_dec(PL_errors);
1049 SvREFCNT_dec(PL_isarev);
1052 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1053 if (PL_scopestack_ix != 0)
1054 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1055 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1056 (long)PL_scopestack_ix);
1057 if (PL_savestack_ix != 0)
1058 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1059 "Unbalanced saves: %ld more saves than restores\n",
1060 (long)PL_savestack_ix);
1061 if (PL_tmps_floor != -1)
1062 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1063 (long)PL_tmps_floor + 1);
1064 if (cxstack_ix != -1)
1065 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1066 (long)cxstack_ix + 1);
1069 /* Now absolutely destruct everything, somehow or other, loops or no. */
1071 /* the 2 is for PL_fdpid and PL_strtab */
1072 while (sv_clean_all() > 2)
1075 AvREAL_off(PL_fdpid); /* no surviving entries */
1076 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1079 #ifdef HAVE_INTERP_INTERN
1083 /* Destruct the global string table. */
1085 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1086 * so that sv_free() won't fail on them.
1087 * Now that the global string table is using a single hunk of memory
1088 * for both HE and HEK, we either need to explicitly unshare it the
1089 * correct way, or actually free things here.
1092 const I32 max = HvMAX(PL_strtab);
1093 HE * const * const array = HvARRAY(PL_strtab);
1094 HE *hent = array[0];
1097 if (hent && ckWARN_d(WARN_INTERNAL)) {
1098 HE * const next = HeNEXT(hent);
1099 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1100 "Unbalanced string table refcount: (%ld) for \"%s\"",
1101 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1108 hent = array[riter];
1113 HvARRAY(PL_strtab) = 0;
1114 HvTOTALKEYS(PL_strtab) = 0;
1115 HvFILL(PL_strtab) = 0;
1117 SvREFCNT_dec(PL_strtab);
1120 /* free the pointer tables used for cloning */
1121 ptr_table_free(PL_ptr_table);
1122 PL_ptr_table = (PTR_TBL_t*)NULL;
1125 /* free special SVs */
1127 SvREFCNT(&PL_sv_yes) = 0;
1128 sv_clear(&PL_sv_yes);
1129 SvANY(&PL_sv_yes) = NULL;
1130 SvFLAGS(&PL_sv_yes) = 0;
1132 SvREFCNT(&PL_sv_no) = 0;
1133 sv_clear(&PL_sv_no);
1134 SvANY(&PL_sv_no) = NULL;
1135 SvFLAGS(&PL_sv_no) = 0;
1139 for (i=0; i<=2; i++) {
1140 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1141 sv_clear(PERL_DEBUG_PAD(i));
1142 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1143 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1147 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1148 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1150 #ifdef DEBUG_LEAKING_SCALARS
1151 if (PL_sv_count != 0) {
1156 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1157 svend = &sva[SvREFCNT(sva)];
1158 for (sv = sva + 1; sv < svend; ++sv) {
1159 if (SvTYPE(sv) != SVTYPEMASK) {
1160 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1162 " refcnt=%"UVuf pTHX__FORMAT "\n"
1163 "\tallocated at %s:%d %s %s%s\n",
1164 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1166 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1168 sv->sv_debug_inpad ? "for" : "by",
1169 sv->sv_debug_optype ?
1170 PL_op_name[sv->sv_debug_optype]: "(none)",
1171 sv->sv_debug_cloned ? " (cloned)" : ""
1173 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1174 Perl_dump_sv_child(aTHX_ sv);
1180 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1184 /* Wait for up to 4 seconds for child to terminate.
1185 This seems to be the least effort way of timing out on reaping
1187 struct timeval waitfor = {4, 0};
1188 int sock = PL_dumper_fd;
1192 FD_SET(sock, &rset);
1193 select(sock + 1, &rset, NULL, NULL, &waitfor);
1194 waitpid(child, &status, WNOHANG);
1199 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1205 #ifdef PERL_DEBUG_READONLY_OPS
1211 #if defined(PERLIO_LAYERS)
1212 /* No more IO - including error messages ! */
1213 PerlIO_cleanup(aTHX);
1216 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1217 as currently layers use it rather than NULL as a marker
1218 for no arg - and will try and SvREFCNT_dec it.
1220 SvREFCNT(&PL_sv_undef) = 0;
1221 SvREADONLY_off(&PL_sv_undef);
1223 Safefree(PL_origfilename);
1224 PL_origfilename = NULL;
1225 Safefree(PL_reg_start_tmp);
1226 PL_reg_start_tmp = (char**)NULL;
1227 PL_reg_start_tmpl = 0;
1228 Safefree(PL_reg_curpm);
1229 Safefree(PL_reg_poscache);
1230 free_tied_hv_pool();
1231 Safefree(PL_op_mask);
1232 Safefree(PL_psig_name);
1233 PL_psig_name = (SV**)NULL;
1234 PL_psig_ptr = (SV**)NULL;
1235 Safefree(PL_psig_pend);
1236 PL_psig_pend = (int*)NULL;
1238 /* We need to NULL PL_psig_pend first, so that
1239 signal handlers know not to use it */
1240 int *psig_save = PL_psig_pend;
1241 PL_psig_pend = (int*)NULL;
1242 Safefree(psig_save);
1246 PL_tainting = FALSE;
1247 PL_taint_warn = FALSE;
1248 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1251 DEBUG_P(debprofdump());
1253 #ifdef USE_REENTRANT_API
1254 Perl_reentrant_free(aTHX);
1259 while (PL_regmatch_slab) {
1260 regmatch_slab *s = PL_regmatch_slab;
1261 PL_regmatch_slab = PL_regmatch_slab->next;
1265 /* As the absolutely last thing, free the non-arena SV for mess() */
1268 /* we know that type == SVt_PVMG */
1270 /* it could have accumulated taint magic */
1273 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1274 moremagic = mg->mg_moremagic;
1275 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1277 Safefree(mg->mg_ptr);
1281 /* we know that type >= SVt_PV */
1282 SvPV_free(PL_mess_sv);
1283 Safefree(SvANY(PL_mess_sv));
1284 Safefree(PL_mess_sv);
1291 =for apidoc perl_free
1293 Releases a Perl interpreter. See L<perlembed>.
1303 PERL_ARGS_ASSERT_PERL_FREE;
1305 if (PL_veto_cleanup)
1308 #ifdef PERL_TRACK_MEMPOOL
1311 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1312 * value as we're probably hunting memory leaks then
1314 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1315 if (!s || atoi(s) == 0) {
1316 const U32 old_debug = PL_debug;
1317 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1318 thread at thread exit. */
1320 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1321 "free this thread's memory\n");
1322 PL_debug &= ~ DEBUG_m_FLAG;
1324 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1325 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1326 PL_debug = old_debug;
1331 #if defined(WIN32) || defined(NETWARE)
1332 # if defined(PERL_IMPLICIT_SYS)
1335 void *host = nw_internal_host;
1337 void *host = w32_internal_host;
1339 PerlMem_free(aTHXx);
1341 nw_delete_internal_host(host);
1343 win32_delete_internal_host(host);
1347 PerlMem_free(aTHXx);
1350 PerlMem_free(aTHXx);
1354 #if defined(USE_ITHREADS)
1355 /* provide destructors to clean up the thread key when libperl is unloaded */
1356 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1358 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1359 #pragma fini "perl_fini"
1360 #elif defined(__sun) && !defined(__GNUC__)
1361 #pragma fini (perl_fini)
1365 #if defined(__GNUC__)
1366 __attribute__((destructor))
1371 if (PL_curinterp && !PL_veto_cleanup)
1376 #endif /* THREADS */
1379 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1382 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1383 PL_exitlist[PL_exitlistlen].fn = fn;
1384 PL_exitlist[PL_exitlistlen].ptr = ptr;
1388 #ifdef HAS_PROCSELFEXE
1389 /* This is a function so that we don't hold on to MAXPATHLEN
1390 bytes of stack longer than necessary
1393 S_procself_val(pTHX_ SV *sv, const char *arg0)
1395 char buf[MAXPATHLEN];
1396 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1398 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1399 includes a spurious NUL which will cause $^X to fail in system
1400 or backticks (this will prevent extensions from being built and
1401 many tests from working). readlink is not meant to add a NUL.
1402 Normal readlink works fine.
1404 if (len > 0 && buf[len-1] == '\0') {
1408 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1409 returning the text "unknown" from the readlink rather than the path
1410 to the executable (or returning an error from the readlink). Any valid
1411 path has a '/' in it somewhere, so use that to validate the result.
1412 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1414 if (len > 0 && memchr(buf, '/', len)) {
1415 sv_setpvn(sv,buf,len);
1421 #endif /* HAS_PROCSELFEXE */
1424 S_set_caret_X(pTHX) {
1426 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1428 #ifdef HAS_PROCSELFEXE
1429 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1432 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1434 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1441 =for apidoc perl_parse
1443 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1449 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1456 PERL_ARGS_ASSERT_PERL_PARSE;
1457 #ifndef MULTIPLICITY
1458 PERL_UNUSED_ARG(my_perl);
1461 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1462 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1463 * This MUST be done before any hash stores or fetches take place.
1464 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1465 * yourself, it is your responsibility to provide a good random seed!
1466 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1467 if (!PL_rehash_seed_set)
1468 PL_rehash_seed = get_hash_seed();
1470 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1472 if (s && (atoi(s) == 1))
1473 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1475 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1480 if (PL_origalen != 0) {
1481 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1484 /* Set PL_origalen be the sum of the contiguous argv[]
1485 * elements plus the size of the env in case that it is
1486 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1487 * as the maximum modifiable length of $0. In the worst case
1488 * the area we are able to modify is limited to the size of
1489 * the original argv[0]. (See below for 'contiguous', though.)
1491 const char *s = NULL;
1494 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1495 /* Do the mask check only if the args seem like aligned. */
1497 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1499 /* See if all the arguments are contiguous in memory. Note
1500 * that 'contiguous' is a loose term because some platforms
1501 * align the argv[] and the envp[]. If the arguments look
1502 * like non-aligned, assume that they are 'strictly' or
1503 * 'traditionally' contiguous. If the arguments look like
1504 * aligned, we just check that they are within aligned
1505 * PTRSIZE bytes. As long as no system has something bizarre
1506 * like the argv[] interleaved with some other data, we are
1507 * fine. (Did I just evoke Murphy's Law?) --jhi */
1508 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1510 for (i = 1; i < PL_origargc; i++) {
1511 if ((PL_origargv[i] == s + 1
1513 || PL_origargv[i] == s + 2
1518 (PL_origargv[i] > s &&
1520 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1531 #ifndef PERL_USE_SAFE_PUTENV
1532 /* Can we grab env area too to be used as the area for $0? */
1533 if (s && PL_origenviron && !PL_use_safe_putenv) {
1534 if ((PL_origenviron[0] == s + 1)
1537 (PL_origenviron[0] > s &&
1538 PL_origenviron[0] <=
1539 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1542 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1543 s = PL_origenviron[0];
1546 my_setenv("NoNe SuCh", NULL);
1547 /* Force copy of environment. */
1548 for (i = 1; PL_origenviron[i]; i++) {
1549 if (PL_origenviron[i] == s + 1
1552 (PL_origenviron[i] > s &&
1553 PL_origenviron[i] <=
1554 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1557 s = PL_origenviron[i];
1565 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1567 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1572 /* Come here if running an undumped a.out. */
1574 PL_origfilename = savepv(argv[0]);
1575 PL_do_undump = FALSE;
1576 cxstack_ix = -1; /* start label stack again */
1578 assert (!PL_tainted);
1580 S_set_caret_X(aTHX);
1582 init_postdump_symbols(argc,argv,env);
1587 op_free(PL_main_root);
1588 PL_main_root = NULL;
1590 PL_main_start = NULL;
1591 SvREFCNT_dec(PL_main_cv);
1595 oldscope = PL_scopestack_ix;
1596 PL_dowarn = G_WARN_OFF;
1601 parse_body(env,xsinit);
1603 call_list(oldscope, PL_unitcheckav);
1605 call_list(oldscope, PL_checkav);
1612 /* my_exit() was called */
1613 while (PL_scopestack_ix > oldscope)
1616 PL_curstash = PL_defstash;
1618 call_list(oldscope, PL_unitcheckav);
1620 call_list(oldscope, PL_checkav);
1624 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1632 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1633 miniperl, and we need to see those flags reflected in the values here. */
1635 /* What this returns is subject to change. Use the public interface in Config.
1638 S_Internals_V(pTHX_ CV *cv)
1641 #ifdef LOCAL_PATCH_COUNT
1642 const int local_patch_count = LOCAL_PATCH_COUNT;
1644 const int local_patch_count = 0;
1646 const int entries = 4 + local_patch_count;
1648 static char non_bincompat_options[] =
1655 # ifdef PERL_DISABLE_PMC
1658 # ifdef PERL_DONT_CREATE_GVSV
1659 " PERL_DONT_CREATE_GVSV"
1661 # ifdef PERL_IS_MINIPERL
1664 # ifdef PERL_MALLOC_WRAP
1667 # ifdef PERL_MEM_LOG
1670 # ifdef PERL_MEM_LOG_NOIMPL
1671 " PERL_MEM_LOG_NOIMPL"
1673 # ifdef PERL_USE_DEVEL
1676 # ifdef PERL_USE_SAFE_PUTENV
1677 " PERL_USE_SAFE_PUTENV"
1679 # ifdef USE_SITECUSTOMIZE
1680 " USE_SITECUSTOMIZE"
1682 # ifdef USE_FAST_STDIO
1686 PERL_UNUSED_ARG(cv);
1687 PERL_UNUSED_ARG(items);
1689 EXTEND(SP, entries);
1691 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1692 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1693 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1697 PUSHs(Perl_newSVpvn_flags(aTHX_
1698 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1701 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1705 PUSHs(&PL_sv_undef);
1708 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN(OSNAME), SVs_TEMP));
1710 for (i = 1; i <= local_patch_count; i++) {
1711 /* This will be an undef, if PL_localpatches[i] is NULL. */
1712 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1718 #define INCPUSH_UNSHIFT 0x01
1719 #define INCPUSH_ADD_OLD_VERS 0x02
1720 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1721 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1722 #define INCPUSH_NOT_BASEDIR 0x10
1723 #define INCPUSH_CAN_RELOCATE 0x20
1724 #define INCPUSH_ADD_SUB_DIRS \
1725 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1728 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1732 int argc = PL_origargc;
1733 char **argv = PL_origargv;
1734 const char *scriptname = NULL;
1735 VOL bool dosearch = FALSE;
1737 const char *cddir = NULL;
1738 #ifdef USE_SITECUSTOMIZE
1739 bool minus_f = FALSE;
1741 SV *linestr_sv = newSV_type(SVt_PVIV);
1742 bool add_read_e_script = FALSE;
1744 SvGROW(linestr_sv, 80);
1745 sv_setpvs(linestr_sv,"");
1751 for (argc--,argv++; argc > 0; argc--,argv++) {
1752 if (argv[0][0] != '-' || !argv[0][1])
1758 #ifndef PERL_STRICT_CR
1782 if ((s = moreswitches(s)))
1787 CHECK_MALLOC_TOO_LATE_FOR('t');
1788 if( !PL_tainting ) {
1789 PL_taint_warn = TRUE;
1795 CHECK_MALLOC_TOO_LATE_FOR('T');
1797 PL_taint_warn = FALSE;
1805 forbid_setid('e', FALSE);
1807 PL_e_script = newSVpvs("");
1808 add_read_e_script = TRUE;
1811 sv_catpv(PL_e_script, s);
1813 sv_catpv(PL_e_script, argv[1]);
1817 Perl_croak(aTHX_ "No code specified for -%c", c);
1818 sv_catpvs(PL_e_script, "\n");
1822 #ifdef USE_SITECUSTOMIZE
1828 case 'I': /* -I handled both here and in moreswitches() */
1829 forbid_setid('I', FALSE);
1830 if (!*++s && (s=argv[1]) != NULL) {
1834 STRLEN len = strlen(s);
1835 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1838 Perl_croak(aTHX_ "No directory specified for -I");
1841 forbid_setid('S', FALSE);
1850 opts_prog = newSVpvs("use Config; Config::_V()");
1854 opts_prog = Perl_newSVpvf(aTHX_
1855 "use Config; Config::config_vars(qw%c%s%c)",
1859 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1860 /* don't look for script or read stdin */
1861 scriptname = BIT_BUCKET;
1865 PL_doextract = TRUE;
1873 if (!*++s || isSPACE(*s)) {
1877 /* catch use of gnu style long options */
1878 if (strEQ(s, "version")) {
1882 if (strEQ(s, "help")) {
1889 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1900 #ifndef SECURE_INTERNAL_GETENV
1903 (s = PerlEnv_getenv("PERL5OPT")))
1907 if (*s == '-' && *(s+1) == 'T') {
1908 CHECK_MALLOC_TOO_LATE_FOR('T');
1910 PL_taint_warn = FALSE;
1913 char *popt_copy = NULL;
1926 if (!strchr("CDIMUdmtwW", *s))
1927 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1931 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1932 s = popt_copy + (s - d);
1940 if( !PL_tainting ) {
1941 PL_taint_warn = TRUE;
1952 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1954 /* SITELIB_EXP is a function call on Win32.
1955 The games with local $! are to avoid setting errno if there is no
1956 sitecustomize script. */
1957 const char *const sitelib = SITELIB_EXP;
1958 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1960 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1965 scriptname = argv[0];
1968 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1970 else if (scriptname == NULL) {
1972 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1978 /* Set $^X early so that it can be used for relocatable paths in @INC */
1979 assert (!PL_tainted);
1981 S_set_caret_X(aTHX);
1986 bool suidscript = FALSE;
1988 open_script(scriptname, dosearch, &suidscript, &rsfp);
1990 validate_suid(validarg, scriptname, fdscript, suidscript,
1994 # if defined(SIGCHLD) || defined(SIGCLD)
1997 # define SIGCHLD SIGCLD
1999 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2000 if (sigstate == (Sighandler_t) SIG_IGN) {
2001 if (ckWARN(WARN_SIGNAL))
2002 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2003 "Can't ignore signal CHLD, forcing to default");
2004 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2012 /* This will croak if suidscript is true, as -x cannot be used with
2014 forbid_setid('x', suidscript);
2015 /* Hence you can't get here if suidscript is true */
2017 find_beginning(linestr_sv, rsfp);
2018 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2019 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2023 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2024 CvUNIQUE_on(PL_compcv);
2026 CvPADLIST(PL_compcv) = pad_new(0);
2028 PL_isarev = newHV();
2031 boot_core_UNIVERSAL();
2033 newXS("Internals::V", S_Internals_V, __FILE__);
2036 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2038 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2044 # ifdef HAS_SOCKS5_INIT
2045 socks5_init(argv[0]);
2051 init_predump_symbols();
2052 /* init_postdump_symbols not currently designed to be called */
2053 /* more than once (ENV isn't cleared first, for example) */
2054 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2056 init_postdump_symbols(argc,argv,env);
2058 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2059 * or explicitly in some platforms.
2060 * locale.c:Perl_init_i18nl10n() if the environment
2061 * look like the user wants to use UTF-8. */
2062 #if defined(__SYMBIAN32__)
2063 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2065 # ifndef PERL_IS_MINIPERL
2067 /* Requires init_predump_symbols(). */
2068 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2073 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2074 * and the default open disciplines. */
2075 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2076 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2078 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2079 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2080 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2082 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2083 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2084 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2086 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2087 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2088 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2090 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2091 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2094 sv_setpvs(sv, ":utf8\0:utf8");
2096 sv_setpvs(sv, ":utf8\0");
2099 sv_setpvs(sv, "\0:utf8");
2108 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2109 if (strEQ(s, "unsafe"))
2110 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2111 else if (strEQ(s, "safe"))
2112 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2114 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2121 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2125 PL_xmlfp = PerlIO_stdout();
2127 PL_xmlfp = PerlIO_open(s, "w");
2129 Perl_croak(aTHX_ "Can't open %s", s);
2131 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2137 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2138 PL_madskills = atoi(s);
2139 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2144 lex_start(linestr_sv, rsfp, TRUE);
2145 PL_subname = newSVpvs("main");
2147 if (add_read_e_script)
2148 filter_add(read_e_script, NULL);
2150 /* now parse the script */
2152 SETERRNO(0,SS_NORMAL);
2153 if (yyparse() || PL_parser->error_count) {
2155 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2157 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2161 CopLINE_set(PL_curcop, 0);
2162 PL_curstash = PL_defstash;
2164 SvREFCNT_dec(PL_e_script);
2172 SAVECOPFILE(PL_curcop);
2173 SAVECOPLINE(PL_curcop);
2174 gv_check(PL_defstash);
2183 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2184 dump_mstats("after compilation:");
2194 =for apidoc perl_run
2196 Tells a Perl interpreter to run. See L<perlembed>.
2209 PERL_ARGS_ASSERT_PERL_RUN;
2210 #ifndef MULTIPLICITY
2211 PERL_UNUSED_ARG(my_perl);
2214 oldscope = PL_scopestack_ix;
2222 cxstack_ix = -1; /* start context stack again */
2224 case 0: /* normal completion */
2228 case 2: /* my_exit() */
2229 while (PL_scopestack_ix > oldscope)
2232 PL_curstash = PL_defstash;
2233 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2234 PL_endav && !PL_minus_c)
2235 call_list(oldscope, PL_endav);
2237 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2238 dump_mstats("after execution: ");
2244 POPSTACK_TO(PL_mainstack);
2247 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2258 S_run_body(pTHX_ I32 oldscope)
2261 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2262 PL_sawampersand ? "Enabling" : "Omitting"));
2264 if (!PL_restartop) {
2268 exit(0); /* less likely to core dump than my_exit(0) */
2272 if (DEBUG_x_TEST || DEBUG_B_TEST)
2273 dump_all_perl(!DEBUG_B_TEST);
2275 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2279 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2282 if (PERLDB_SINGLE && PL_DBsingle)
2283 sv_setiv(PL_DBsingle, 1);
2285 call_list(oldscope, PL_initav);
2286 #ifdef PERL_DEBUG_READONLY_OPS
2287 Perl_pending_Slabs_to_ro(aTHX);
2294 PL_op = PL_restartop;
2298 else if (PL_main_start) {
2299 CvDEPTH(PL_main_cv) = 1;
2300 PL_op = PL_main_start;
2308 =head1 SV Manipulation Functions
2310 =for apidoc p||get_sv
2312 Returns the SV of the specified Perl scalar. C<flags> are passed to
2313 C<gv_fetchpv>. If C<GV_ADD> is set and the
2314 Perl variable does not exist then it will be created. If C<flags> is zero
2315 and the variable does not exist then NULL is returned.
2321 Perl_get_sv(pTHX_ const char *name, I32 flags)
2325 PERL_ARGS_ASSERT_GET_SV;
2327 gv = gv_fetchpv(name, flags, SVt_PV);
2334 =head1 Array Manipulation Functions
2336 =for apidoc p||get_av
2338 Returns the AV of the specified Perl array. C<flags> are passed to
2339 C<gv_fetchpv>. If C<GV_ADD> is set and the
2340 Perl variable does not exist then it will be created. If C<flags> is zero
2341 and the variable does not exist then NULL is returned.
2347 Perl_get_av(pTHX_ const char *name, I32 flags)
2349 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2351 PERL_ARGS_ASSERT_GET_AV;
2361 =head1 Hash Manipulation Functions
2363 =for apidoc p||get_hv
2365 Returns the HV of the specified Perl hash. C<flags> are passed to
2366 C<gv_fetchpv>. If C<GV_ADD> is set and the
2367 Perl variable does not exist then it will be created. If C<flags> is zero
2368 and the variable does not exist then NULL is returned.
2374 Perl_get_hv(pTHX_ const char *name, I32 flags)
2376 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2378 PERL_ARGS_ASSERT_GET_HV;
2388 =head1 CV Manipulation Functions
2390 =for apidoc p||get_cvn_flags
2392 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2393 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2394 exist then it will be declared (which has the same effect as saying
2395 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2396 then NULL is returned.
2398 =for apidoc p||get_cv
2400 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2406 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2408 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2409 /* XXX this is probably not what they think they're getting.
2410 * It has the same effect as "sub name;", i.e. just a forward
2413 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2415 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2416 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2417 return newSUB(start_subparse(FALSE, 0),
2418 newSVOP(OP_CONST, 0, sv),
2426 /* Nothing in core calls this now, but we can't replace it with a macro and
2427 move it to mathoms.c as a macro would evaluate name twice. */
2429 Perl_get_cv(pTHX_ const char *name, I32 flags)
2431 PERL_ARGS_ASSERT_GET_CV;
2433 return get_cvn_flags(name, strlen(name), flags);
2436 /* Be sure to refetch the stack pointer after calling these routines. */
2440 =head1 Callback Functions
2442 =for apidoc p||call_argv
2444 Performs a callback to the specified Perl sub. See L<perlcall>.
2450 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2452 /* See G_* flags in cop.h */
2453 /* null terminated arg list */
2458 PERL_ARGS_ASSERT_CALL_ARGV;
2463 mXPUSHs(newSVpv(*argv,0));
2468 return call_pv(sub_name, flags);
2472 =for apidoc p||call_pv
2474 Performs a callback to the specified Perl sub. See L<perlcall>.
2480 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2481 /* name of the subroutine */
2482 /* See G_* flags in cop.h */
2484 PERL_ARGS_ASSERT_CALL_PV;
2486 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2490 =for apidoc p||call_method
2492 Performs a callback to the specified Perl method. The blessed object must
2493 be on the stack. See L<perlcall>.
2499 Perl_call_method(pTHX_ const char *methname, I32 flags)
2500 /* name of the subroutine */
2501 /* See G_* flags in cop.h */
2504 PERL_ARGS_ASSERT_CALL_METHOD;
2506 len = strlen(methname);
2508 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2509 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2512 /* May be called with any of a CV, a GV, or an SV containing the name. */
2514 =for apidoc p||call_sv
2516 Performs a callback to the Perl sub whose name is in the SV. See
2523 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2524 /* See G_* flags in cop.h */
2527 LOGOP myop; /* fake syntax tree node */
2532 bool oldcatch = CATCH_GET;
2534 OP* const oldop = PL_op;
2537 PERL_ARGS_ASSERT_CALL_SV;
2539 if (flags & G_DISCARD) {
2543 if (!(flags & G_WANT)) {
2544 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2549 Zero(&myop, 1, LOGOP);
2550 myop.op_next = NULL;
2551 if (!(flags & G_NOARGS))
2552 myop.op_flags |= OPf_STACKED;
2553 myop.op_flags |= OP_GIMME_REVERSE(flags);
2557 EXTEND(PL_stack_sp, 1);
2558 *++PL_stack_sp = sv;
2560 oldscope = PL_scopestack_ix;
2562 if (PERLDB_SUB && PL_curstash != PL_debstash
2563 /* Handle first BEGIN of -d. */
2564 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2565 /* Try harder, since this may have been a sighandler, thus
2566 * curstash may be meaningless. */
2567 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2568 && !(flags & G_NODEBUG))
2569 PL_op->op_private |= OPpENTERSUB_DB;
2571 if (flags & G_METHOD) {
2572 Zero(&method_op, 1, UNOP);
2573 method_op.op_next = PL_op;
2574 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2575 method_op.op_type = OP_METHOD;
2576 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2577 myop.op_type = OP_ENTERSUB;
2578 PL_op = (OP*)&method_op;
2581 if (!(flags & G_EVAL)) {
2583 CALL_BODY_SUB((OP*)&myop);
2584 retval = PL_stack_sp - (PL_stack_base + oldmark);
2585 CATCH_SET(oldcatch);
2588 myop.op_other = (OP*)&myop;
2590 create_eval_scope(flags|G_FAKINGEVAL);
2598 CALL_BODY_SUB((OP*)&myop);
2599 retval = PL_stack_sp - (PL_stack_base + oldmark);
2600 if (!(flags & G_KEEPERR)) {
2608 /* my_exit() was called */
2609 PL_curstash = PL_defstash;
2612 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2613 Perl_croak(aTHX_ "Callback called exit");
2618 PL_op = PL_restartop;
2622 PL_stack_sp = PL_stack_base + oldmark;
2623 if ((flags & G_WANT) == G_ARRAY)
2627 *++PL_stack_sp = &PL_sv_undef;
2632 if (PL_scopestack_ix > oldscope)
2633 delete_eval_scope();
2637 if (flags & G_DISCARD) {
2638 PL_stack_sp = PL_stack_base + oldmark;
2647 /* Eval a string. The G_EVAL flag is always assumed. */
2650 =for apidoc p||eval_sv
2652 Tells Perl to C<eval> the string in the SV.
2658 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2660 /* See G_* flags in cop.h */
2664 UNOP myop; /* fake syntax tree node */
2665 VOL I32 oldmark = SP - PL_stack_base;
2668 OP* const oldop = PL_op;
2671 PERL_ARGS_ASSERT_EVAL_SV;
2673 if (flags & G_DISCARD) {
2680 Zero(PL_op, 1, UNOP);
2681 EXTEND(PL_stack_sp, 1);
2682 *++PL_stack_sp = sv;
2684 if (!(flags & G_NOARGS))
2685 myop.op_flags = OPf_STACKED;
2686 myop.op_next = NULL;
2687 myop.op_type = OP_ENTEREVAL;
2688 myop.op_flags |= OP_GIMME_REVERSE(flags);
2689 if (flags & G_KEEPERR)
2690 myop.op_flags |= OPf_SPECIAL;
2692 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2693 * before a PUSHEVAL, which corrupts the stack after a croak */
2694 TAINT_PROPER("eval_sv()");
2700 CALL_BODY_EVAL((OP*)&myop);
2701 retval = PL_stack_sp - (PL_stack_base + oldmark);
2702 if (!(flags & G_KEEPERR)) {
2710 /* my_exit() was called */
2711 PL_curstash = PL_defstash;
2714 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2715 Perl_croak(aTHX_ "Callback called exit");
2720 PL_op = PL_restartop;
2724 PL_stack_sp = PL_stack_base + oldmark;
2725 if ((flags & G_WANT) == G_ARRAY)
2729 *++PL_stack_sp = &PL_sv_undef;
2735 if (flags & G_DISCARD) {
2736 PL_stack_sp = PL_stack_base + oldmark;
2746 =for apidoc p||eval_pv
2748 Tells Perl to C<eval> the given string and return an SV* result.
2754 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2758 SV* sv = newSVpv(p, 0);
2760 PERL_ARGS_ASSERT_EVAL_PV;
2762 eval_sv(sv, G_SCALAR);
2769 if (croak_on_error && SvTRUE(ERRSV)) {
2770 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2776 /* Require a module. */
2779 =head1 Embedding Functions
2781 =for apidoc p||require_pv
2783 Tells Perl to C<require> the file named by the string argument. It is
2784 analogous to the Perl code C<eval "require '$file'">. It's even
2785 implemented that way; consider using load_module instead.
2790 Perl_require_pv(pTHX_ const char *pv)
2796 PERL_ARGS_ASSERT_REQUIRE_PV;
2798 PUSHSTACKi(PERLSI_REQUIRE);
2800 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2801 eval_sv(sv_2mortal(sv), G_DISCARD);
2807 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2809 /* This message really ought to be max 23 lines.
2810 * Removed -h because the user already knows that option. Others? */
2812 static const char * const usage_msg[] = {
2813 "-0[octal] specify record separator (\\0, if no argument)",
2814 "-a autosplit mode with -n or -p (splits $_ into @F)",
2815 "-C[number/list] enables the listed Unicode features",
2816 "-c check syntax only (runs BEGIN and CHECK blocks)",
2817 "-d[:debugger] run program under debugger",
2818 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2819 "-e program one line of program (several -e's allowed, omit programfile)",
2820 "-E program like -e, but enables all optional features",
2821 "-f don't do $sitelib/sitecustomize.pl at startup",
2822 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2823 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2824 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2825 "-l[octal] enable line ending processing, specifies line terminator",
2826 "-[mM][-]module execute \"use/no module...\" before executing program",
2827 "-n assume \"while (<>) { ... }\" loop around program",
2828 "-p assume loop like -n but print line also, like sed",
2829 "-s enable rudimentary parsing for switches after programfile",
2830 "-S look for programfile using PATH environment variable",
2831 "-t enable tainting warnings",
2832 "-T enable tainting checks",
2833 "-u dump core after parsing program",
2834 "-U allow unsafe operations",
2835 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2836 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2837 "-w enable many useful warnings (RECOMMENDED)",
2838 "-W enable all warnings",
2839 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2840 "-X disable all warnings",
2844 const char * const *p = usage_msg;
2846 PERL_ARGS_ASSERT_USAGE;
2848 PerlIO_printf(PerlIO_stdout(),
2849 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2852 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2855 /* convert a string of -D options (or digits) into an int.
2856 * sets *s to point to the char after the options */
2860 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2862 static const char * const usage_msgd[] = {
2863 " Debugging flag values: (see also -d)",
2864 " p Tokenizing and parsing (with v, displays parse stack)",
2865 " s Stack snapshots (with v, displays all stacks)",
2866 " l Context (loop) stack processing",
2867 " t Trace execution",
2868 " o Method and overloading resolution",
2869 " c String/numeric conversions",
2870 " P Print profiling info, source file input state",
2871 " m Memory and SV allocation",
2872 " f Format processing",
2873 " r Regular expression parsing and execution",
2874 " x Syntax tree dump",
2875 " u Tainting checks",
2876 " H Hash dump -- usurps values()",
2877 " X Scratchpad allocation",
2880 " R Include reference counts of dumped variables (eg when using -Ds)",
2881 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2882 " v Verbose: use in conjunction with other flags",
2884 " A Consistency checks on internal structures",
2885 " q quiet - currently only suppresses the 'EXECUTING' message",
2886 " M trace smart match resolution",
2887 " B dump suBroutine definitions, including special Blocks like BEGIN",
2892 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2895 /* if adding extra options, remember to update DEBUG_MASK */
2896 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2898 for (; isALNUM(**s); (*s)++) {
2899 const char * const d = strchr(debopts,**s);
2901 i |= 1 << (d - debopts);
2902 else if (ckWARN_d(WARN_DEBUGGING))
2903 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2904 "invalid option -D%c, use -D'' to see choices\n", **s);
2907 else if (isDIGIT(**s)) {
2909 for (; isALNUM(**s); (*s)++) ;
2911 else if (givehelp) {
2912 const char *const *p = usage_msgd;
2913 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2916 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2917 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2918 "-Dp not implemented on this platform\n");
2924 /* This routine handles any switches that can be given during run */
2927 Perl_moreswitches(pTHX_ const char *s)
2931 const char option = *s; /* used to remember option in -m/-M code */
2933 PERL_ARGS_ASSERT_MORESWITCHES;
2941 SvREFCNT_dec(PL_rs);
2942 if (s[1] == 'x' && s[2]) {
2943 const char *e = s+=2;
2949 flags = PERL_SCAN_SILENT_ILLDIGIT;
2950 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2951 if (s + numlen < e) {
2952 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2956 PL_rs = newSVpvs("");
2957 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2958 tmps = (U8*)SvPVX(PL_rs);
2959 uvchr_to_utf8(tmps, rschar);
2960 SvCUR_set(PL_rs, UNISKIP(rschar));
2965 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2966 if (rschar & ~((U8)~0))
2967 PL_rs = &PL_sv_undef;
2968 else if (!rschar && numlen >= 2)
2969 PL_rs = newSVpvs("");
2971 char ch = (char)rschar;
2972 PL_rs = newSVpvn(&ch, 1);
2975 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2980 PL_unicode = parse_unicode_opts( (const char **)&s );
2981 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2987 while (*s && !isSPACE(*s)) ++s;
2988 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2999 forbid_setid('d', FALSE);
3002 /* -dt indicates to the debugger that threads will be used */
3003 if (*s == 't' && !isALNUM(s[1])) {
3005 my_setenv("PERL5DB_THREADED", "1");
3008 /* The following permits -d:Mod to accepts arguments following an =
3009 in the fashion that -MSome::Mod does. */
3010 if (*s == ':' || *s == '=') {
3011 const char *start = ++s;
3012 const char *const end = s + strlen(s);
3013 SV * const sv = newSVpvs("use Devel::");
3015 /* We now allow -d:Module=Foo,Bar */
3016 while(isALNUM(*s) || *s==':') ++s;
3018 sv_catpvn(sv, start, end - start);
3020 sv_catpvn(sv, start, s-start);
3021 /* Don't use NUL as q// delimiter here, this string goes in the
3023 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3026 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3030 PL_perldb = PERLDB_ALL;
3037 forbid_setid('D', FALSE);
3039 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3040 #else /* !DEBUGGING */
3041 if (ckWARN_d(WARN_DEBUGGING))
3042 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3043 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3044 for (s++; isALNUM(*s); s++) ;
3049 usage(PL_origargv[0]);
3052 Safefree(PL_inplace);
3053 #if defined(__CYGWIN__) /* do backup extension automagically */
3054 if (*(s+1) == '\0') {
3055 PL_inplace = savepvs(".bak");
3058 #endif /* __CYGWIN__ */
3060 const char * const start = ++s;
3061 while (*s && !isSPACE(*s))
3064 PL_inplace = savepvn(start, s - start);
3068 if (*s == '-') /* Additional switches on #! line. */
3072 case 'I': /* -I handled both here and in parse_body() */
3073 forbid_setid('I', FALSE);
3075 while (*s && isSPACE(*s))
3080 /* ignore trailing spaces (possibly followed by other switches) */
3082 for (e = p; *e && !isSPACE(*e); e++) ;
3086 } while (*p && *p != '-');
3088 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3094 Perl_croak(aTHX_ "No directory specified for -I");
3100 SvREFCNT_dec(PL_ors_sv);
3106 PL_ors_sv = newSVpvs("\n");
3107 numlen = 3 + (*s == '0');
3108 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3112 if (RsPARA(PL_rs)) {
3113 PL_ors_sv = newSVpvs("\n\n");
3116 PL_ors_sv = newSVsv(PL_rs);
3121 forbid_setid('M', FALSE); /* XXX ? */
3124 forbid_setid('m', FALSE); /* XXX ? */
3129 const char *use = "use ";
3131 /* -M-foo == 'no foo' */
3132 /* Leading space on " no " is deliberate, to make both
3133 possibilities the same length. */
3134 if (*s == '-') { use = " no "; ++s; }
3135 sv = newSVpvn(use,4);
3137 /* We allow -M'Module qw(Foo Bar)' */
3138 while(isALNUM(*s) || *s==':') {
3147 Perl_croak(aTHX_ "Module name required with -%c option",
3150 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3151 "contains single ':'",
3152 (int)(s - start), start, option);
3153 end = s + strlen(s);
3155 sv_catpvn(sv, start, end - start);
3156 if (option == 'm') {
3158 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3159 sv_catpvs( sv, " ()");
3162 sv_catpvn(sv, start, s-start);
3163 /* Use NUL as q''-delimiter. */
3164 sv_catpvs(sv, " split(/,/,q\0");
3166 sv_catpvn(sv, s, end - s);
3167 sv_catpvs(sv, "\0)");
3170 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3173 Perl_croak(aTHX_ "Missing argument to -%c", option);
3184 forbid_setid('s', FALSE);
3185 PL_doswitches = TRUE;
3199 PL_do_undump = TRUE;
3207 if (!sv_derived_from(PL_patchlevel, "version"))
3208 upg_version(PL_patchlevel, TRUE);
3211 SV* level= vstringify(PL_patchlevel);
3212 #ifdef PERL_PATCHNUM
3213 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3214 SV *num = newSVpvs(PERL_PATCHNUM "*");
3216 SV *num = newSVpvs(PERL_PATCHNUM);
3219 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3220 SvREFCNT_dec(level);
3223 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3227 PerlIO_printf(PerlIO_stdout(),
3228 "\nThis is perl, %"SVf
3232 SvREFCNT_dec(level);
3235 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3236 PerlIO_printf(PerlIO_stdout(),
3237 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3238 SVfARG(vstringify(PL_patchlevel))));
3239 PerlIO_printf(PerlIO_stdout(),
3240 Perl_form(aTHX_ " built under %s at %s %s\n",
3241 OSNAME, __DATE__, __TIME__));
3242 PerlIO_printf(PerlIO_stdout(),
3243 Perl_form(aTHX_ " OS Specific Release: %s\n",
3246 #if defined(LOCAL_PATCH_COUNT)
3247 if (LOCAL_PATCH_COUNT > 0)
3248 PerlIO_printf(PerlIO_stdout(),
3249 "\n(with %d registered patch%s, "
3250 "see perl -V for more detail)",
3252 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\n\nCopyright 1987-2009, Larry Wall\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3264 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3267 PerlIO_printf(PerlIO_stdout(),
3268 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3269 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "atariST series port, ++jrb bammi@cadence.com\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "EPOC port by Olaf Flebbe, 1999-2002\n");
3304 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3305 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3308 #ifdef __SYMBIAN32__
3309 PerlIO_printf(PerlIO_stdout(),
3310 "Symbian port by Nokia, 2004-2005\n");
3312 #ifdef BINARY_BUILD_NOTICE
3313 BINARY_BUILD_NOTICE;
3315 PerlIO_printf(PerlIO_stdout(),
3317 Perl may be copied only under the terms of either the Artistic License or the\n\
3318 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3319 Complete documentation for Perl, including FAQ lists, should be found on\n\
3320 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3321 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3324 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3325 PL_dowarn |= G_WARN_ON;
3330 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3331 if (!specialWARN(PL_compiling.cop_warnings))
3332 PerlMemShared_free(PL_compiling.cop_warnings);
3333 PL_compiling.cop_warnings = pWARN_ALL ;
3337 PL_dowarn = G_WARN_ALL_OFF;
3338 if (!specialWARN(PL_compiling.cop_warnings))
3339 PerlMemShared_free(PL_compiling.cop_warnings);
3340 PL_compiling.cop_warnings = pWARN_NONE ;
3347 if (s[0] == '-') /* Additional switches on #! line. */
3352 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3358 #ifdef ALTERNATE_SHEBANG
3359 case 'S': /* OS/2 needs -S on "extproc" line. */
3363 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3368 /* compliments of Tom Christiansen */
3370 /* unexec() can be found in the Gnu emacs distribution */
3371 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3374 Perl_my_unexec(pTHX)
3376 PERL_UNUSED_CONTEXT;
3378 SV * prog = newSVpv(BIN_EXP, 0);
3379 SV * file = newSVpv(PL_origfilename, 0);
3383 sv_catpvs(prog, "/perl");
3384 sv_catpvs(file, ".perldump");
3386 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3387 /* unexec prints msg to stderr in case of failure */
3388 PerlProc_exit(status);
3391 # include <lib$routines.h>
3392 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3393 # elif defined(WIN32) || defined(__CYGWIN__)
3394 Perl_croak(aTHX_ "dump is not supported");
3396 ABORT(); /* for use with undump */
3401 /* initialize curinterp */
3407 # define PERLVAR(var,type)
3408 # define PERLVARA(var,n,type)
3409 # if defined(PERL_IMPLICIT_CONTEXT)
3410 # define PERLVARI(var,type,init) aTHX->var = init;
3411 # define PERLVARIC(var,type,init) aTHX->var = init;
3413 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3414 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3416 # include "intrpvar.h"
3422 # define PERLVAR(var,type)
3423 # define PERLVARA(var,n,type)
3424 # define PERLVARI(var,type,init) PL_##var = init;
3425 # define PERLVARIC(var,type,init) PL_##var = init;
3426 # include "intrpvar.h"
3433 /* As these are inside a structure, PERLVARI isn't capable of initialising
3435 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3436 PL_reg_poscache = PL_reg_starttry = NULL;
3440 S_init_main_stash(pTHX)
3445 PL_curstash = PL_defstash = newHV();
3446 /* We know that the string "main" will be in the global shared string
3447 table, so it's a small saving to use it rather than allocate another
3449 PL_curstname = newSVpvs_share("main");
3450 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3451 /* If we hadn't caused another reference to "main" to be in the shared
3452 string table above, then it would be worth reordering these two,
3453 because otherwise all we do is delete "main" from it as a consequence
3454 of the SvREFCNT_dec, only to add it again with hv_name_set */
3455 SvREFCNT_dec(GvHV(gv));
3456 hv_name_set(PL_defstash, "main", 4, 0);
3457 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3459 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3461 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3462 GvMULTI_on(PL_incgv);
3463 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3464 GvMULTI_on(PL_hintgv);
3465 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3466 SvREFCNT_inc_simple_void(PL_defgv);
3467 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3468 SvREFCNT_inc_simple_void(PL_errgv);
3469 GvMULTI_on(PL_errgv);
3470 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3471 GvMULTI_on(PL_replgv);
3472 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3473 #ifdef PERL_DONT_CREATE_GVSV
3476 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3478 PL_curstash = PL_defstash;
3479 CopSTASH_set(&PL_compiling, PL_defstash);
3480 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3481 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3483 /* We must init $/ before switches are processed. */
3484 sv_setpvs(get_sv("/", GV_ADD), "\n");
3488 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3489 bool *suidscript, PerlIO **rsfpp)
3494 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3497 PL_origfilename = savepvs("-e");
3500 /* if find_script() returns, it returns a malloc()-ed value */
3501 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3503 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3504 const char *s = scriptname + 8;
3510 * Tell apart "normal" usage of fdscript, e.g.
3511 * with bash on FreeBSD:
3512 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3513 * from usage in suidperl.
3514 * Does any "normal" usage leave garbage after the number???
3515 * Is it a mistake to use a similar /dev/fd/ construct for
3520 * Be supersafe and do some sanity-checks.
3521 * Still, can we be sure we got the right thing?
3524 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3527 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3529 scriptname = savepv(s + 1);
3530 Safefree(PL_origfilename);
3531 PL_origfilename = (char *)scriptname;
3536 CopFILE_free(PL_curcop);
3537 CopFILE_set(PL_curcop, PL_origfilename);
3538 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3539 scriptname = (char *)"";
3540 if (fdscript >= 0) {
3541 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3542 # if defined(HAS_FCNTL) && defined(F_SETFD)
3544 /* ensure close-on-exec */
3545 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3548 else if (!*scriptname) {
3549 forbid_setid(0, *suidscript);
3550 *rsfpp = PerlIO_stdin();
3553 #ifdef FAKE_BIT_BUCKET
3554 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3555 * is called) and still have the "-e" work. (Believe it or not,
3556 * a /dev/null is required for the "-e" to work because source
3557 * filter magic is used to implement it. ) This is *not* a general
3558 * replacement for a /dev/null. What we do here is create a temp
3559 * file (an empty file), open up that as the script, and then
3560 * immediately close and unlink it. Close enough for jazz. */
3561 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3562 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3563 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3564 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3565 FAKE_BIT_BUCKET_TEMPLATE
3567 const char * const err = "Failed to create a fake bit bucket";
3568 if (strEQ(scriptname, BIT_BUCKET)) {
3569 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3570 int tmpfd = mkstemp(tmpname);
3572 scriptname = tmpname;
3575 Perl_croak(aTHX_ err);
3578 scriptname = mktemp(tmpname);
3580 Perl_croak(aTHX_ err);
3585 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3586 #ifdef FAKE_BIT_BUCKET
3587 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3588 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3589 && strlen(scriptname) == sizeof(tmpname) - 1) {
3592 scriptname = BIT_BUCKET;
3594 # if defined(HAS_FCNTL) && defined(F_SETFD)
3596 /* ensure close-on-exec */
3597 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3601 /* PSz 16 Sep 03 Keep neat error message */
3603 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3605 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3606 CopFILE(PL_curcop), Strerror(errno));
3612 * I_SYSSTATVFS HAS_FSTATVFS
3614 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3615 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3616 * here so that metaconfig picks them up. */
3619 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3620 /* Don't even need this function. */
3623 S_validate_suid(pTHX_ PerlIO *rsfp)
3625 PERL_ARGS_ASSERT_VALIDATE_SUID;
3627 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3630 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3631 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3633 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3636 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3637 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3638 /* not set-id, must be wrapped */
3641 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3644 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3648 register const char *s2;
3650 PERL_ARGS_ASSERT_FIND_BEGINNING;
3652 /* skip forward in input to the real script? */
3654 while (PL_doextract) {
3655 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3656 Perl_croak(aTHX_ "No Perl script found in input\n");
3658 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3659 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3660 PL_doextract = FALSE;
3661 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3663 while (*s == ' ' || *s == '\t') s++;
3665 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3666 || s2[-1] == '_') s2--;
3667 if (strnEQ(s2-4,"perl",4))
3668 while ((s = moreswitches(s)))
3680 PL_uid = PerlProc_getuid();
3681 PL_euid = PerlProc_geteuid();
3682 PL_gid = PerlProc_getgid();
3683 PL_egid = PerlProc_getegid();
3685 PL_uid |= PL_gid << 16;
3686 PL_euid |= PL_egid << 16;
3688 /* Should not happen: */
3689 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3690 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3693 * Should go by suidscript, not uid!=euid: why disallow
3694 * system("ls") in scripts run from setuid things?
3695 * Or, is this run before we check arguments and set suidscript?
3696 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3697 * (We never have suidscript, can we be sure to have fdscript?)
3698 * Or must then go by UID checks? See comments in forbid_setid also.
3702 /* This is used very early in the lifetime of the program,
3703 * before even the options are parsed, so PL_tainting has
3704 * not been initialized properly. */
3706 Perl_doing_taint(int argc, char *argv[], char *envp[])
3708 #ifndef PERL_IMPLICIT_SYS
3709 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3710 * before we have an interpreter-- and the whole point of this
3711 * function is to be called at such an early stage. If you are on
3712 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3713 * "tainted because running with altered effective ids', you'll
3714 * have to add your own checks somewhere in here. The two most
3715 * known samples of 'implicitness' are Win32 and NetWare, neither
3716 * of which has much of concept of 'uids'. */
3717 int uid = PerlProc_getuid();
3718 int euid = PerlProc_geteuid();
3719 int gid = PerlProc_getgid();
3720 int egid = PerlProc_getegid();
3727 if (uid && (euid != uid || egid != gid))
3729 #endif /* !PERL_IMPLICIT_SYS */
3730 /* This is a really primitive check; environment gets ignored only
3731 * if -T are the first chars together; otherwise one gets
3732 * "Too late" message. */
3733 if ( argc > 1 && argv[1][0] == '-'
3734 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3739 /* Passing the flag as a single char rather than a string is a slight space
3740 optimisation. The only message that isn't /^-.$/ is
3741 "program input from stdin", which is substituted in place of '\0', which
3742 could never be a command line flag. */
3744 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3747 char string[3] = "-x";
3748 const char *message = "program input from stdin";
3755 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3756 if (PL_euid != PL_uid)
3757 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3758 if (PL_egid != PL_gid)
3759 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3760 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3762 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3766 Perl_init_debugger(pTHX)
3769 HV * const ostash = PL_curstash;
3771 PL_curstash = PL_debstash;
3772 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3774 AvREAL_off(PL_dbargs);
3775 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3776 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3777 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3778 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3779 sv_setiv(PL_DBsingle, 0);
3780 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3781 sv_setiv(PL_DBtrace, 0);
3782 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3783 sv_setiv(PL_DBsignal, 0);
3784 PL_curstash = ostash;
3787 #ifndef STRESS_REALLOC
3788 #define REASONABLE(size) (size)
3790 #define REASONABLE(size) (1) /* unreasonable */
3794 Perl_init_stacks(pTHX)
3797 /* start with 128-item stack and 8K cxstack */
3798 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3799 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3800 PL_curstackinfo->si_type = PERLSI_MAIN;
3801 PL_curstack = PL_curstackinfo->si_stack;
3802 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3804 PL_stack_base = AvARRAY(PL_curstack);
3805 PL_stack_sp = PL_stack_base;
3806 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3808 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3811 PL_tmps_max = REASONABLE(128);
3813 Newx(PL_markstack,REASONABLE(32),I32);
3814 PL_markstack_ptr = PL_markstack;
3815 PL_markstack_max = PL_markstack + REASONABLE(32);
3819 Newx(PL_scopestack,REASONABLE(32),I32);
3820 PL_scopestack_ix = 0;
3821 PL_scopestack_max = REASONABLE(32);
3823 Newx(PL_savestack,REASONABLE(128),ANY);
3824 PL_savestack_ix = 0;
3825 PL_savestack_max = REASONABLE(128);
3834 while (PL_curstackinfo->si_next)
3835 PL_curstackinfo = PL_curstackinfo->si_next;
3836 while (PL_curstackinfo) {
3837 PERL_SI *p = PL_curstackinfo->si_prev;
3838 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3839 Safefree(PL_curstackinfo->si_cxstack);
3840 Safefree(PL_curstackinfo);
3841 PL_curstackinfo = p;
3843 Safefree(PL_tmps_stack);
3844 Safefree(PL_markstack);
3845 Safefree(PL_scopestack);
3846 Safefree(PL_savestack);
3851 S_init_predump_symbols(pTHX)
3857 sv_setpvs(get_sv("\"", GV_ADD), " ");
3858 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3860 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3861 GvMULTI_on(PL_stdingv);
3862 io = GvIOp(PL_stdingv);
3863 IoTYPE(io) = IoTYPE_RDONLY;
3864 IoIFP(io) = PerlIO_stdin();
3865 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3867 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3869 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3872 IoTYPE(io) = IoTYPE_WRONLY;
3873 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3875 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3877 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3879 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3880 GvMULTI_on(PL_stderrgv);
3881 io = GvIOp(PL_stderrgv);
3882 IoTYPE(io) = IoTYPE_WRONLY;
3883 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3884 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3886 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3888 PL_statname = newSV(0); /* last filename we did stat on */
3892 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3896 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3898 argc--,argv++; /* skip name of script */
3899 if (PL_doswitches) {
3900 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3904 if (argv[0][1] == '-' && !argv[0][2]) {
3908 if ((s = strchr(argv[0], '='))) {
3909 const char *const start_name = argv[0] + 1;
3910 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3911 TRUE, SVt_PV)), s + 1);
3914 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3917 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3918 GvMULTI_on(PL_argvgv);
3919 (void)gv_AVadd(PL_argvgv);
3920 av_clear(GvAVn(PL_argvgv));
3921 for (; argc > 0; argc--,argv++) {
3922 SV * const sv = newSVpv(argv[0],0);
3923 av_push(GvAVn(PL_argvgv),sv);
3924 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3925 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3928 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3929 (void)sv_utf8_decode(sv);
3935 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3940 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3942 PL_toptarget = newSV_type(SVt_PVFM);
3943 sv_setpvs(PL_toptarget, "");
3944 PL_bodytarget = newSV_type(SVt_PVFM);
3945 sv_setpvs(PL_bodytarget, "");
3946 PL_formtarget = PL_bodytarget;
3950 init_argv_symbols(argc,argv);
3952 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3953 sv_setpv(GvSV(tmpgv),PL_origfilename);
3955 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3957 bool env_is_not_environ;
3958 GvMULTI_on(PL_envgv);
3959 hv = GvHVn(PL_envgv);
3960 hv_magic(hv, NULL, PERL_MAGIC_env);
3962 #ifdef USE_ENVIRON_ARRAY
3963 /* Note that if the supplied env parameter is actually a copy
3964 of the global environ then it may now point to free'd memory
3965 if the environment has been modified since. To avoid this
3966 problem we treat env==NULL as meaning 'use the default'
3970 env_is_not_environ = env != environ;
3971 if (env_is_not_environ
3972 # ifdef USE_ITHREADS
3973 && PL_curinterp == aTHX
3982 for (; *env; env++) {
3985 if (!(s = strchr(old_var,'=')) || s == old_var)
3988 #if defined(MSDOS) && !defined(DJGPP)
3990 (void)strupr(old_var);
3993 sv = newSVpv(s+1, 0);
3994 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3995 if (env_is_not_environ)
3999 #endif /* USE_ENVIRON_ARRAY */
4000 #endif /* !PERL_MICRO */
4003 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4004 SvREADONLY_off(GvSV(tmpgv));
4005 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4006 SvREADONLY_on(GvSV(tmpgv));
4008 #ifdef THREADS_HAVE_PIDS
4009 PL_ppid = (IV)getppid();
4012 /* touch @F array to prevent spurious warnings 20020415 MJD */
4014 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4019 S_init_perllib(pTHX)
4023 const char *perl5lib = NULL;
4032 perl5lib = PerlEnv_getenv("PERL5LIB");
4034 * It isn't possible to delete an environment variable with
4035 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4036 * case we treat PERL5LIB as undefined if it has a zero-length value.
4038 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4039 if (perl5lib && *perl5lib != '\0')
4043 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4045 s = PerlEnv_getenv("PERLLIB");
4047 incpush_use_sep(s, 0, 0);
4050 /* Treat PERL5?LIB as a possible search list logical name -- the
4051 * "natural" VMS idiom for a Unix path string. We allow each
4052 * element to be a set of |-separated directories for compatibility.
4056 if (my_trnlnm("PERL5LIB",buf,0))
4058 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4059 } while (my_trnlnm("PERL5LIB",buf,++idx));
4061 while (my_trnlnm("PERLLIB",buf,idx++))
4062 incpush_use_sep(buf, 0, 0);
4067 #ifndef PERL_IS_MINIPERL
4068 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4069 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4071 /* Use the ~-expanded versions of APPLLIB (undocumented),
4072 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4075 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4076 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4080 /* sitearch is always relative to sitelib on Windows for
4081 * DLL-based path intuition to work correctly */
4082 # if !defined(WIN32)
4083 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4084 INCPUSH_CAN_RELOCATE);
4090 /* this picks up sitearch as well */
4091 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4093 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4095 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4099 #ifdef PERL_VENDORARCH_EXP
4100 /* vendorarch is always relative to vendorlib on Windows for
4101 * DLL-based path intuition to work correctly */
4102 # if !defined(WIN32)
4103 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4104 INCPUSH_CAN_RELOCATE);
4108 #ifdef PERL_VENDORLIB_EXP
4110 /* this picks up vendorarch as well */
4111 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4113 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4115 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4116 INCPUSH_CAN_RELOCATE);
4121 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4125 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4129 s = win32_get_privlib(PERL_FS_VERSION, &len);
4131 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4134 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4136 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4140 #ifdef PERL_OTHERLIBDIRS
4141 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4142 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4143 |INCPUSH_CAN_RELOCATE);
4149 * It isn't possible to delete an environment variable with
4150 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4151 * case we treat PERL5LIB as undefined if it has a zero-length value.
4153 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4154 if (perl5lib && *perl5lib != '\0')
4158 incpush_use_sep(perl5lib, 0,
4159 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4161 /* Treat PERL5?LIB as a possible search list logical name -- the
4162 * "natural" VMS idiom for a Unix path string. We allow each
4163 * element to be a set of |-separated directories for compatibility.
4167 if (my_trnlnm("PERL5LIB",buf,0))
4169 incpush_use_sep(buf, 0,
4170 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4171 } while (my_trnlnm("PERL5LIB",buf,++idx));
4175 /* Use the ~-expanded versions of APPLLIB (undocumented),
4176 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4179 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4180 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4183 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4184 /* Search for version-specific dirs below here */
4185 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4186 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4190 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4191 /* Search for version-specific dirs below here */
4192 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4193 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4196 #ifdef PERL_OTHERLIBDIRS
4197 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4198 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4199 |INCPUSH_CAN_RELOCATE);
4201 #endif /* !PERL_IS_MINIPERL */
4204 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4207 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4208 # define PERLLIB_SEP ';'
4211 # define PERLLIB_SEP '|'
4213 # define PERLLIB_SEP ':'
4216 #ifndef PERLLIB_MANGLE
4217 # define PERLLIB_MANGLE(s,n) (s)
4220 /* Push a directory onto @INC if it exists.
4221 Generate a new SV if we do this, to save needing to copy the SV we push
4224 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4229 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4231 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4232 S_ISDIR(tmpstatbuf.st_mode)) {
4234 dir = newSVsv(stem);
4236 /* Truncate dir back to stem. */
4237 SvCUR_set(dir, SvCUR(stem));
4243 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4246 const U8 using_sub_dirs
4247 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4248 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4249 const U8 add_versioned_sub_dirs
4250 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4251 const U8 add_archonly_sub_dirs
4252 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4253 #ifdef PERL_INC_VERSION_LIST
4254 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4256 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4257 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4258 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4259 AV *const inc = GvAVn(PL_incgv);
4261 PERL_ARGS_ASSERT_INCPUSH;
4264 /* Could remove this vestigial extra block, if we don't mind a lot of
4265 re-indenting diff noise. */
4268 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4269 arranged to unshift #! line -I onto the front of @INC. However,
4270 -I can add version and architecture specific libraries, and they
4271 need to go first. The old code assumed that it was always
4272 pushing. Hence to make it work, need to push the architecture
4273 (etc) libraries onto a temporary array, then "unshift" that onto
4274 the front of @INC. */
4275 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4278 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4279 defined to so something (in os2/os2.c), but the code has been
4280 this way, ignoring any possible changed of length, since
4281 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4283 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4285 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4288 /* Do the if() outside the #ifdef to avoid warnings about an unused
4291 #ifdef PERL_RELOCATABLE_INC
4293 * Relocatable include entries are marked with a leading .../
4296 * 0: Remove that leading ".../"
4297 * 1: Remove trailing executable name (anything after the last '/')
4298 * from the perl path to give a perl prefix
4300 * While the @INC element starts "../" and the prefix ends with a real
4301 * directory (ie not . or ..) chop that real directory off the prefix
4302 * and the leading "../" from the @INC element. ie a logical "../"
4304 * Finally concatenate the prefix and the remainder of the @INC element
4305 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4306 * generates /usr/local/lib/perl5
4308 const char *libpath = SvPVX(libdir);
4309 STRLEN libpath_len = SvCUR(libdir);
4310 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4312 SV * const caret_X = get_sv("\030", 0);
4313 /* Going to use the SV just as a scratch buffer holding a C
4319 /* $^X is *the* source of taint if tainting is on, hence
4320 SvPOK() won't be true. */
4322 assert(SvPOKp(caret_X));
4323 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4325 /* Firstly take off the leading .../
4326 If all else fail we'll do the paths relative to the current
4328 sv_chop(libdir, libpath + 4);
4329 /* Don't use SvPV as we're intentionally bypassing taining,
4330 mortal copies that the mg_get of tainting creates, and
4331 corruption that seems to come via the save stack.
4332 I guess that the save stack isn't correctly set up yet. */
4333 libpath = SvPVX(libdir);
4334 libpath_len = SvCUR(libdir);
4336 /* This would work more efficiently with memrchr, but as it's
4337 only a GNU extension we'd need to probe for it and
4338 implement our own. Not hard, but maybe not worth it? */
4340 prefix = SvPVX(prefix_sv);
4341 lastslash = strrchr(prefix, '/');
4343 /* First time in with the *lastslash = '\0' we just wipe off
4344 the trailing /perl from (say) /usr/foo/bin/perl
4348 while ((*lastslash = '\0'), /* Do that, come what may. */
4349 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4350 && (lastslash = strrchr(prefix, '/')))) {
4351 if (lastslash[1] == '\0'
4352 || (lastslash[1] == '.'
4353 && (lastslash[2] == '/' /* ends "/." */
4354 || (lastslash[2] == '/'
4355 && lastslash[3] == '/' /* or "/.." */
4357 /* Prefix ends "/" or "/." or "/..", any of which
4358 are fishy, so don't do any more logical cleanup.
4362 /* Remove leading "../" from path */
4365 /* Next iteration round the loop removes the last
4366 directory name from prefix by writing a '\0' in
4367 the while clause. */
4369 /* prefix has been terminated with a '\0' to the correct
4370 length. libpath points somewhere into the libdir SV.
4371 We need to join the 2 with '/' and drop the result into
4373 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4374 SvREFCNT_dec(libdir);
4375 /* And this is the new libdir. */
4378 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4379 /* Need to taint reloccated paths if running set ID */
4380 SvTAINTED_on(libdir);
4383 SvREFCNT_dec(prefix_sv);
4388 * BEFORE pushing libdir onto @INC we may first push version- and
4389 * archname-specific sub-directories.
4391 if (using_sub_dirs) {
4393 #ifdef PERL_INC_VERSION_LIST
4394 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4395 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4396 const char * const *incver;
4403 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4405 while (unix[len-1] == '/') len--; /* Cosmetic */
4406 sv_usepvn(libdir,unix,len);
4409 PerlIO_printf(Perl_error_log,
4410 "Failed to unixify @INC element \"%s\"\n",
4414 subdir = newSVsv(libdir);
4416 if (add_versioned_sub_dirs) {
4417 /* .../version/archname if -d .../version/archname */
4418 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4419 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4421 /* .../version if -d .../version */
4422 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4423 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4426 #ifdef PERL_INC_VERSION_LIST
4428 for (incver = incverlist; *incver; incver++) {
4429 /* .../xxx if -d .../xxx */
4430 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4431 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4436 if (add_archonly_sub_dirs) {
4437 /* .../archname if -d .../archname */
4438 sv_catpvs(subdir, "/" ARCHNAME);
4439 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4443 assert (SvREFCNT(subdir) == 1);
4444 SvREFCNT_dec(subdir);
4447 /* finally add this lib directory at the end of @INC */
4449 U32 extra = av_len(av) + 1;
4450 av_unshift(inc, extra + push_basedir);
4452 av_store(inc, extra, libdir);
4454 /* av owns a reference, av_store() expects to be donated a
4455 reference, and av expects to be sane when it's cleared.
4456 If I wanted to be naughty and wrong, I could peek inside the
4457 implementation of av_clear(), realise that it uses
4458 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4459 and so directly steal from it (with a memcpy() to inc, and
4460 then memset() to NULL them out. But people copy code from the
4461 core expecting it to be best practise, so let's use the API.
4462 Although studious readers will note that I'm not checking any
4464 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4468 else if (push_basedir) {
4469 av_push(inc, libdir);
4472 if (!push_basedir) {
4473 assert (SvREFCNT(libdir) == 1);
4474 SvREFCNT_dec(libdir);
4480 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4484 /* This logic has been broken out from S_incpush(). It may be possible to
4487 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4494 /* Break at all separators */
4495 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4497 /* skip any consecutive separators */
4499 /* Uncomment the next line for PATH semantics */
4500 /* But you'll need to write tests */
4501 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4503 incpush(p, (STRLEN)(s - p), flags);
4508 incpush(p, (STRLEN)(end - p), flags);
4513 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4517 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4523 PERL_ARGS_ASSERT_CALL_LIST;
4525 while (av_len(paramList) >= 0) {
4526 cv = MUTABLE_CV(av_shift(paramList));
4528 if (paramList == PL_beginav) {
4529 /* save PL_beginav for compiler */
4530 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4532 else if (paramList == PL_checkav) {
4533 /* save PL_checkav for compiler */
4534 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4536 else if (paramList == PL_unitcheckav) {
4537 /* save PL_unitcheckav for compiler */
4538 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4549 PL_madskills |= 16384;
4554 PL_madskills &= ~16384;
4557 (void)SvPV_const(atsv, len);
4559 PL_curcop = &PL_compiling;
4560 CopLINE_set(PL_curcop, oldline);
4561 if (paramList == PL_beginav)
4562 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4564 Perl_sv_catpvf(aTHX_ atsv,
4565 "%s failed--call queue aborted",
4566 paramList == PL_checkav ? "CHECK"
4567 : paramList == PL_initav ? "INIT"
4568 : paramList == PL_unitcheckav ? "UNITCHECK"
4570 while (PL_scopestack_ix > oldscope)
4573 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4580 /* my_exit() was called */
4581 while (PL_scopestack_ix > oldscope)
4584 PL_curstash = PL_defstash;
4585 PL_curcop = &PL_compiling;
4586 CopLINE_set(PL_curcop, oldline);
4588 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4589 if (paramList == PL_beginav)
4590 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4592 Perl_croak(aTHX_ "%s failed--call queue aborted",
4593 paramList == PL_checkav ? "CHECK"
4594 : paramList == PL_initav ? "INIT"
4595 : paramList == PL_unitcheckav ? "UNITCHECK"
4602 PL_curcop = &PL_compiling;
4603 CopLINE_set(PL_curcop, oldline);
4606 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4615 Perl_my_exit(pTHX_ U32 status)
4626 STATUS_EXIT_SET(status);
4633 Perl_my_failure_exit(pTHX)
4637 /* We have been called to fall on our sword. The desired exit code
4638 * should be already set in STATUS_UNIX, but could be shifted over
4639 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4642 * If an error code has not been set, then force the issue.
4644 if (MY_POSIX_EXIT) {
4646 /* According to the die_exit.t tests, if errno is non-zero */
4647 /* It should be used for the error status. */
4649 if (errno == EVMSERR) {
4650 STATUS_NATIVE = vaxc$errno;
4653 /* According to die_exit.t tests, if the child_exit code is */
4654 /* also zero, then we need to exit with a code of 255 */
4655 if ((errno != 0) && (errno < 256))
4656 STATUS_UNIX_EXIT_SET(errno);
4657 else if (STATUS_UNIX < 255) {
4658 STATUS_UNIX_EXIT_SET(255);
4663 /* The exit code could have been set by $? or vmsish which
4664 * means that it may not have fatal set. So convert
4665 * success/warning codes to fatal with out changing
4666 * the POSIX status code. The severity makes VMS native
4667 * status handling work, while UNIX mode programs use the
4668 * the POSIX exit codes.
4670 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4671 STATUS_NATIVE &= STS$M_COND_ID;
4672 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4676 /* Traditionally Perl on VMS always expects a Fatal Error. */
4677 if (vaxc$errno & 1) {
4679 /* So force success status to failure */
4680 if (STATUS_NATIVE & 1)
4685 STATUS_UNIX = EINTR; /* In case something cares */
4690 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4692 /* Encode the severity code */
4693 severity = STATUS_NATIVE & STS$M_SEVERITY;
4694 STATUS_UNIX = (severity ? severity : 1) << 8;
4696 /* Perl expects this to be a fatal error */
4697 if (severity != STS$K_SEVERE)
4706 STATUS_UNIX_SET(errno);
4708 exitstatus = STATUS_UNIX >> 8;
4709 if (exitstatus & 255)
4710 STATUS_UNIX_SET(exitstatus);
4712 STATUS_UNIX_SET(255);
4719 S_my_exit_jump(pTHX)
4724 SvREFCNT_dec(PL_e_script);
4728 POPSTACK_TO(PL_mainstack);
4736 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4739 const char * const p = SvPVX_const(PL_e_script);
4740 const char *nl = strchr(p, '\n');
4742 PERL_UNUSED_ARG(idx);
4743 PERL_UNUSED_ARG(maxlen);
4745 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4747 filter_del(read_e_script);
4750 sv_catpvn(buf_sv, p, nl-p);
4751 sv_chop(PL_e_script, nl);
4757 * c-indentation-style: bsd
4759 * indent-tabs-mode: t
4762 * ex: set ts=8 sts=4 sw=4 noet: