4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others
7 * You may distribute under the terms of either the GNU General Public
8 * License or the Artistic License, as specified in the README file.
13 * A ship then new they built for him
14 * of mithril and of elven-glass
15 * --from Bilbo's song of EƤrendil
17 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
20 /* This file contains the top-level functions that are used to create, use
21 * and destroy a perl interpreter, plus the functions used by XS code to
22 * call back into perl. Note that it does not contain the actual main()
23 * function of the interpreter; that can be found in perlmain.c
27 #define PERL_IN_PERL_C
29 #include "patchlevel.h" /* for local_patches */
36 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
41 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
43 # include <sys/wait.h>
51 char control[CMSG_SPACE(sizeof(int))];
68 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
69 char *getenv (char *); /* Usually in <stdlib.h> */
72 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
74 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
75 /* Drop everything. Heck, don't even try to call it */
76 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
78 /* Drop almost everything */
79 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
82 #define CALL_BODY_EVAL(myop) \
83 if (PL_op == (myop)) \
84 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
88 #define CALL_BODY_SUB(myop) \
89 if (PL_op == (myop)) \
90 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
94 #define CALL_LIST_BODY(cv) \
95 PUSHMARK(PL_stack_sp); \
96 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
99 S_init_tls_and_interp(PerlInterpreter *my_perl)
103 PERL_SET_INTERP(my_perl);
104 #if defined(USE_ITHREADS)
107 PERL_SET_THX(my_perl);
110 MUTEX_INIT(&PL_dollarzero_mutex);
112 #ifdef PERL_IMPLICIT_CONTEXT
113 MUTEX_INIT(&PL_my_ctx_mutex);
116 #if defined(USE_ITHREADS)
119 /* This always happens for non-ithreads */
122 PERL_SET_THX(my_perl);
127 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
130 Perl_sys_init(int* argc, char*** argv)
134 PERL_ARGS_ASSERT_SYS_INIT;
136 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
137 PERL_UNUSED_ARG(argv);
138 PERL_SYS_INIT_BODY(argc, argv);
142 Perl_sys_init3(int* argc, char*** argv, char*** env)
146 PERL_ARGS_ASSERT_SYS_INIT3;
148 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
149 PERL_UNUSED_ARG(argv);
150 PERL_UNUSED_ARG(env);
151 PERL_SYS_INIT3_BODY(argc, argv, env);
158 if (!PL_veto_cleanup) {
159 PERL_SYS_TERM_BODY();
164 #ifdef PERL_IMPLICIT_SYS
166 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
167 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
168 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
169 struct IPerlDir* ipD, struct IPerlSock* ipS,
170 struct IPerlProc* ipP)
172 PerlInterpreter *my_perl;
174 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
176 /* Newx() needs interpreter, so call malloc() instead */
177 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
178 S_init_tls_and_interp(my_perl);
179 Zero(my_perl, 1, PerlInterpreter);
189 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
196 =head1 Embedding Functions
198 =for apidoc perl_alloc
200 Allocates a new Perl interpreter. See L<perlembed>.
208 PerlInterpreter *my_perl;
210 /* Newx() needs interpreter, so call malloc() instead */
211 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
213 S_init_tls_and_interp(my_perl);
214 #ifndef PERL_TRACK_MEMPOOL
215 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
217 Zero(my_perl, 1, PerlInterpreter);
218 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
222 #endif /* PERL_IMPLICIT_SYS */
225 =for apidoc perl_construct
227 Initializes a new Perl interpreter. See L<perlembed>.
233 perl_construct(pTHXx)
237 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
241 PL_perl_destruct_level = 1;
243 PERL_UNUSED_ARG(my_perl);
244 if (PL_perl_destruct_level > 0)
247 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
249 /* set read-only and try to insure than we wont see REFCNT==0
252 SvREADONLY_on(&PL_sv_undef);
253 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
255 sv_setpv(&PL_sv_no,PL_No);
256 /* value lookup in void context - happens to have the side effect
257 of caching the numeric forms. However, as &PL_sv_no doesn't contain
258 a string that is a valid numer, we have to turn the public flags by
264 SvREADONLY_on(&PL_sv_no);
265 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
267 sv_setpv(&PL_sv_yes,PL_Yes);
270 SvREADONLY_on(&PL_sv_yes);
271 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
273 SvREADONLY_on(&PL_sv_placeholder);
274 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
276 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
277 #ifdef PERL_USES_PL_PIDSTATUS
278 PL_pidstatus = newHV();
281 PL_rs = newSVpvs("\n");
291 SET_NUMERIC_STANDARD();
293 #if defined(LOCAL_PATCH_COUNT)
294 PL_localpatches = local_patches; /* For possible -v */
297 #ifdef HAVE_INTERP_INTERN
301 PerlIO_init(aTHX); /* Hook to IO system */
303 PL_fdpid = newAV(); /* for remembering popen pids by fd */
304 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
305 PL_errors = newSVpvs("");
306 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
307 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
308 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
310 /* First entry is a list of empty elements. It needs to be initialised
311 else all hell breaks loose in S_find_uninit_var(). */
312 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
313 PL_regex_pad = AvARRAY(PL_regex_padav);
315 #ifdef USE_REENTRANT_API
316 Perl_reentrant_init(aTHX);
319 /* Note that strtab is a rather special HV. Assumptions are made
320 about not iterating on it, and not adding tie magic to it.
321 It is properly deallocated in perl_destruct() */
324 HvSHAREKEYS_off(PL_strtab); /* mandatory */
325 hv_ksplit(PL_strtab, 512);
327 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
328 _dyld_lookup_and_bind
329 ("__environ", (unsigned long *) &environ_pointer, NULL);
333 # ifdef USE_ENVIRON_ARRAY
334 PL_origenviron = environ;
338 /* Use sysconf(_SC_CLK_TCK) if available, if not
339 * available or if the sysconf() fails, use the HZ.
340 * BeOS has those, but returns the wrong value.
341 * The HZ if not originally defined has been by now
342 * been defined as CLK_TCK, if available. */
343 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
344 PL_clocktick = sysconf(_SC_CLK_TCK);
345 if (PL_clocktick <= 0)
349 PL_stashcache = newHV();
351 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
354 if (!PL_mmap_page_size) {
355 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
357 SETERRNO(0, SS_NORMAL);
359 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
361 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
363 if ((long) PL_mmap_page_size < 0) {
365 SV * const error = ERRSV;
366 SvUPGRADE(error, SVt_PV);
367 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
370 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
374 # ifdef HAS_GETPAGESIZE
375 PL_mmap_page_size = getpagesize();
377 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
378 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
382 if (PL_mmap_page_size <= 0)
383 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
384 (IV) PL_mmap_page_size);
386 #endif /* HAS_MMAP */
388 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
389 PL_timesbase.tms_utime = 0;
390 PL_timesbase.tms_stime = 0;
391 PL_timesbase.tms_cutime = 0;
392 PL_timesbase.tms_cstime = 0;
395 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
397 PL_registered_mros = newHV();
398 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
399 HvMAX(PL_registered_mros) = 0;
405 =for apidoc nothreadhook
407 Stub that provides thread hook for perl_destruct when there are
414 Perl_nothreadhook(pTHX)
420 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
422 Perl_dump_sv_child(pTHX_ SV *sv)
425 const int sock = PL_dumper_fd;
426 const int debug_fd = PerlIO_fileno(Perl_debug_log);
427 union control_un control;
430 struct cmsghdr *cmptr;
432 unsigned char buffer[256];
434 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
436 if(sock == -1 || debug_fd == -1)
439 PerlIO_flush(Perl_debug_log);
441 /* All these shenanigans are to pass a file descriptor over to our child for
442 it to dump out to. We can't let it hold open the file descriptor when it
443 forks, as the file descriptor it will dump to can turn out to be one end
444 of pipe that some other process will wait on for EOF. (So as it would
445 be open, the wait would be forever.) */
447 msg.msg_control = control.control;
448 msg.msg_controllen = sizeof(control.control);
449 /* We're a connected socket so we don't need a destination */
455 cmptr = CMSG_FIRSTHDR(&msg);
456 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
457 cmptr->cmsg_level = SOL_SOCKET;
458 cmptr->cmsg_type = SCM_RIGHTS;
459 *((int *)CMSG_DATA(cmptr)) = 1;
461 vec[0].iov_base = (void*)&sv;
462 vec[0].iov_len = sizeof(sv);
463 got = sendmsg(sock, &msg, 0);
466 perror("Debug leaking scalars parent sendmsg failed");
469 if(got < sizeof(sv)) {
470 perror("Debug leaking scalars parent short sendmsg");
474 /* Return protocol is
476 unsigned char: length of location string (0 for empty)
477 unsigned char*: string (not terminated)
479 vec[0].iov_base = (void*)&returned_errno;
480 vec[0].iov_len = sizeof(returned_errno);
481 vec[1].iov_base = buffer;
484 got = readv(sock, vec, 2);
487 perror("Debug leaking scalars parent read failed");
488 PerlIO_flush(PerlIO_stderr());
491 if(got < sizeof(returned_errno) + 1) {
492 perror("Debug leaking scalars parent short read");
493 PerlIO_flush(PerlIO_stderr());
498 got = read(sock, buffer + 1, *buffer);
500 perror("Debug leaking scalars parent read 2 failed");
501 PerlIO_flush(PerlIO_stderr());
506 perror("Debug leaking scalars parent short read 2");
507 PerlIO_flush(PerlIO_stderr());
512 if (returned_errno || *buffer) {
513 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
514 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
515 returned_errno, strerror(returned_errno));
521 =for apidoc perl_destruct
523 Shuts down a Perl interpreter. See L<perlembed>.
532 VOL signed char destruct_level; /* see possible values in intrpvar.h */
534 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
538 PERL_ARGS_ASSERT_PERL_DESTRUCT;
540 PERL_UNUSED_ARG(my_perl);
543 /* wait for all pseudo-forked children to finish */
544 PERL_WAIT_FOR_CHILDREN;
546 destruct_level = PL_perl_destruct_level;
549 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
551 const int i = atoi(s);
552 if (destruct_level < i)
558 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
564 if (PL_endav && !PL_minus_c)
565 call_list(PL_scopestack_ix, PL_endav);
571 /* Need to flush since END blocks can produce output */
574 if (CALL_FPTR(PL_threadhook)(aTHX)) {
575 /* Threads hook has vetoed further cleanup */
576 PL_veto_cleanup = TRUE;
580 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
581 if (destruct_level != 0) {
582 /* Fork here to create a child. Our child's job is to preserve the
583 state of scalars prior to destruction, so that we can instruct it
584 to dump any scalars that we later find have leaked.
585 There's no subtlety in this code - it assumes POSIX, and it doesn't
589 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
590 perror("Debug leaking scalars socketpair failed");
596 perror("Debug leaking scalars fork failed");
600 /* We are the child */
601 const int sock = fd[1];
602 const int debug_fd = PerlIO_fileno(Perl_debug_log);
605 /* Our success message is an integer 0, and a char 0 */
606 static const char success[sizeof(int) + 1] = {0};
610 /* We need to close all other file descriptors otherwise we end up
611 with interesting hangs, where the parent closes its end of a
612 pipe, and sits waiting for (another) child to terminate. Only
613 that child never terminates, because it never gets EOF, because
614 we also have the far end of the pipe open. We even need to
615 close the debugging fd, because sometimes it happens to be one
616 end of a pipe, and a process is waiting on the other end for
617 EOF. Normally it would be closed at some point earlier in
618 destruction, but if we happen to cause the pipe to remain open,
619 EOF never occurs, and we get an infinite hang. Hence all the
620 games to pass in a file descriptor if it's actually needed. */
622 f = sysconf(_SC_OPEN_MAX);
624 where = "sysconf failed";
635 union control_un control;
638 struct cmsghdr *cmptr;
642 msg.msg_control = control.control;
643 msg.msg_controllen = sizeof(control.control);
644 /* We're a connected socket so we don't need a source */
648 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
650 vec[0].iov_base = (void*)⌖
651 vec[0].iov_len = sizeof(target);
653 got = recvmsg(sock, &msg, 0);
658 where = "recv failed";
661 if(got < sizeof(target)) {
662 where = "short recv";
666 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
670 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
671 where = "wrong cmsg_len";
674 if(cmptr->cmsg_level != SOL_SOCKET) {
675 where = "wrong cmsg_level";
678 if(cmptr->cmsg_type != SCM_RIGHTS) {
679 where = "wrong cmsg_type";
683 got_fd = *(int*)CMSG_DATA(cmptr);
684 /* For our last little bit of trickery, put the file descriptor
685 back into Perl_debug_log, as if we never actually closed it
687 if(got_fd != debug_fd) {
688 if (dup2(got_fd, debug_fd) == -1) {
695 PerlIO_flush(Perl_debug_log);
697 got = write(sock, &success, sizeof(success));
700 where = "write failed";
703 if(got < sizeof(success)) {
704 where = "short write";
711 int send_errno = errno;
712 unsigned char length = (unsigned char) strlen(where);
713 struct iovec failure[3] = {
714 {(void*)&send_errno, sizeof(send_errno)},
716 {(void*)where, length}
718 int got = writev(sock, failure, 3);
719 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
720 in the parent if we try to read from the socketpair after the
721 child has exited, even if there was data to read.
722 So sleep a bit to give the parent a fighting chance of
725 _exit((got == -1) ? errno : 0);
729 PL_dumper_fd = fd[0];
734 /* We must account for everything. */
736 /* Destroy the main CV and syntax tree */
737 /* Do this now, because destroying ops can cause new SVs to be generated
738 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
739 PL_curcop to point to a valid op from which the filename structure
741 PL_curcop = &PL_compiling;
743 /* ensure comppad/curpad to refer to main's pad */
744 if (CvPADLIST(PL_main_cv)) {
745 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
747 op_free(PL_main_root);
750 PL_main_start = NULL;
751 SvREFCNT_dec(PL_main_cv);
755 /* Tell PerlIO we are about to tear things apart in case
756 we have layers which are using resources that should
760 PerlIO_destruct(aTHX);
762 if (PL_sv_objcount) {
764 * Try to destruct global references. We do this first so that the
765 * destructors and destructees still exist. Some sv's might remain.
766 * Non-referenced objects are on their own.
770 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
771 PL_defoutgv = NULL; /* may have been freed */
774 /* unhook hooks which will soon be, or use, destroyed data */
775 SvREFCNT_dec(PL_warnhook);
777 SvREFCNT_dec(PL_diehook);
780 /* call exit list functions */
781 while (PL_exitlistlen-- > 0)
782 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
784 Safefree(PL_exitlist);
789 SvREFCNT_dec(PL_registered_mros);
791 /* jettison our possibly duplicated environment */
792 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
793 * so we certainly shouldn't free it here
796 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
797 if (environ != PL_origenviron && !PL_use_safe_putenv
799 /* only main thread can free environ[0] contents */
800 && PL_curinterp == aTHX
806 for (i = 0; environ[i]; i++)
807 safesysfree(environ[i]);
809 /* Must use safesysfree() when working with environ. */
810 safesysfree(environ);
812 environ = PL_origenviron;
815 #endif /* !PERL_MICRO */
817 if (destruct_level == 0) {
819 DEBUG_P(debprofdump());
821 #if defined(PERLIO_LAYERS)
822 /* No more IO - including error messages ! */
823 PerlIO_cleanup(aTHX);
826 CopFILE_free(&PL_compiling);
827 CopSTASH_free(&PL_compiling);
829 /* The exit() function will do everything that needs doing. */
833 /* reset so print() ends up where we expect */
837 /* the syntax tree is shared between clones
838 * so op_free(PL_main_root) only ReREFCNT_dec's
839 * REGEXPs in the parent interpreter
840 * we need to manually ReREFCNT_dec for the clones
842 SvREFCNT_dec(PL_regex_padav);
843 PL_regex_padav = NULL;
847 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
848 PL_stashcache = NULL;
850 /* loosen bonds of global variables */
852 /* XXX can PL_parser still be non-null here? */
853 if(PL_parser && PL_parser->rsfp) {
854 (void)PerlIO_close(PL_parser->rsfp);
855 PL_parser->rsfp = NULL;
859 Safefree(PL_splitstr);
869 PL_doswitches = FALSE;
870 PL_dowarn = G_WARN_OFF;
871 PL_doextract = FALSE;
872 PL_sawampersand = FALSE; /* must save all match strings */
875 Safefree(PL_inplace);
877 SvREFCNT_dec(PL_patchlevel);
880 SvREFCNT_dec(PL_e_script);
886 /* magical thingies */
888 SvREFCNT_dec(PL_ofsgv); /* *, */
891 SvREFCNT_dec(PL_ors_sv); /* $\ */
894 SvREFCNT_dec(PL_rs); /* $/ */
897 Safefree(PL_osname); /* $^O */
900 SvREFCNT_dec(PL_statname);
904 /* defgv, aka *_ should be taken care of elsewhere */
906 /* clean up after study() */
907 SvREFCNT_dec(PL_lastscream);
908 PL_lastscream = NULL;
909 Safefree(PL_screamfirst);
911 Safefree(PL_screamnext);
915 Safefree(PL_efloatbuf);
919 /* startup and shutdown function lists */
920 SvREFCNT_dec(PL_beginav);
921 SvREFCNT_dec(PL_beginav_save);
922 SvREFCNT_dec(PL_endav);
923 SvREFCNT_dec(PL_checkav);
924 SvREFCNT_dec(PL_checkav_save);
925 SvREFCNT_dec(PL_unitcheckav);
926 SvREFCNT_dec(PL_unitcheckav_save);
927 SvREFCNT_dec(PL_initav);
929 PL_beginav_save = NULL;
932 PL_checkav_save = NULL;
933 PL_unitcheckav = NULL;
934 PL_unitcheckav_save = NULL;
937 /* shortcuts just get cleared */
946 PL_last_in_gv = NULL;
958 SvREFCNT_dec(PL_argvout_stack);
959 PL_argvout_stack = NULL;
961 SvREFCNT_dec(PL_modglobal);
963 SvREFCNT_dec(PL_preambleav);
964 PL_preambleav = NULL;
965 SvREFCNT_dec(PL_subname);
967 #ifdef PERL_USES_PL_PIDSTATUS
968 SvREFCNT_dec(PL_pidstatus);
971 SvREFCNT_dec(PL_toptarget);
973 SvREFCNT_dec(PL_bodytarget);
974 PL_bodytarget = NULL;
975 PL_formtarget = NULL;
977 /* free locale stuff */
978 #ifdef USE_LOCALE_COLLATE
979 Safefree(PL_collation_name);
980 PL_collation_name = NULL;
983 #ifdef USE_LOCALE_NUMERIC
984 Safefree(PL_numeric_name);
985 PL_numeric_name = NULL;
986 SvREFCNT_dec(PL_numeric_radix_sv);
987 PL_numeric_radix_sv = NULL;
990 /* clear utf8 character classes */
991 SvREFCNT_dec(PL_utf8_alnum);
992 SvREFCNT_dec(PL_utf8_ascii);
993 SvREFCNT_dec(PL_utf8_alpha);
994 SvREFCNT_dec(PL_utf8_space);
995 SvREFCNT_dec(PL_utf8_cntrl);
996 SvREFCNT_dec(PL_utf8_graph);
997 SvREFCNT_dec(PL_utf8_digit);
998 SvREFCNT_dec(PL_utf8_upper);
999 SvREFCNT_dec(PL_utf8_lower);
1000 SvREFCNT_dec(PL_utf8_print);
1001 SvREFCNT_dec(PL_utf8_punct);
1002 SvREFCNT_dec(PL_utf8_xdigit);
1003 SvREFCNT_dec(PL_utf8_mark);
1004 SvREFCNT_dec(PL_utf8_toupper);
1005 SvREFCNT_dec(PL_utf8_totitle);
1006 SvREFCNT_dec(PL_utf8_tolower);
1007 SvREFCNT_dec(PL_utf8_tofold);
1008 SvREFCNT_dec(PL_utf8_idstart);
1009 SvREFCNT_dec(PL_utf8_idcont);
1010 PL_utf8_alnum = NULL;
1011 PL_utf8_ascii = NULL;
1012 PL_utf8_alpha = NULL;
1013 PL_utf8_space = NULL;
1014 PL_utf8_cntrl = NULL;
1015 PL_utf8_graph = NULL;
1016 PL_utf8_digit = NULL;
1017 PL_utf8_upper = NULL;
1018 PL_utf8_lower = NULL;
1019 PL_utf8_print = NULL;
1020 PL_utf8_punct = NULL;
1021 PL_utf8_xdigit = NULL;
1022 PL_utf8_mark = NULL;
1023 PL_utf8_toupper = NULL;
1024 PL_utf8_totitle = NULL;
1025 PL_utf8_tolower = NULL;
1026 PL_utf8_tofold = NULL;
1027 PL_utf8_idstart = NULL;
1028 PL_utf8_idcont = NULL;
1030 if (!specialWARN(PL_compiling.cop_warnings))
1031 PerlMemShared_free(PL_compiling.cop_warnings);
1032 PL_compiling.cop_warnings = NULL;
1033 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1034 PL_compiling.cop_hints_hash = NULL;
1035 CopFILE_free(&PL_compiling);
1036 CopSTASH_free(&PL_compiling);
1038 /* Prepare to destruct main symbol table. */
1043 SvREFCNT_dec(PL_curstname);
1044 PL_curstname = NULL;
1046 /* clear queued errors */
1047 SvREFCNT_dec(PL_errors);
1050 SvREFCNT_dec(PL_isarev);
1053 if (destruct_level >= 2) {
1054 if (PL_scopestack_ix != 0)
1055 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1056 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1057 (long)PL_scopestack_ix);
1058 if (PL_savestack_ix != 0)
1059 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1060 "Unbalanced saves: %ld more saves than restores\n",
1061 (long)PL_savestack_ix);
1062 if (PL_tmps_floor != -1)
1063 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1064 (long)PL_tmps_floor + 1);
1065 if (cxstack_ix != -1)
1066 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1067 (long)cxstack_ix + 1);
1070 /* Now absolutely destruct everything, somehow or other, loops or no. */
1072 /* the 2 is for PL_fdpid and PL_strtab */
1073 while (sv_clean_all() > 2)
1076 AvREAL_off(PL_fdpid); /* no surviving entries */
1077 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1080 #ifdef HAVE_INTERP_INTERN
1084 /* Destruct the global string table. */
1086 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1087 * so that sv_free() won't fail on them.
1088 * Now that the global string table is using a single hunk of memory
1089 * for both HE and HEK, we either need to explicitly unshare it the
1090 * correct way, or actually free things here.
1093 const I32 max = HvMAX(PL_strtab);
1094 HE * const * const array = HvARRAY(PL_strtab);
1095 HE *hent = array[0];
1098 if (hent && ckWARN_d(WARN_INTERNAL)) {
1099 HE * const next = HeNEXT(hent);
1100 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1101 "Unbalanced string table refcount: (%ld) for \"%s\"",
1102 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1109 hent = array[riter];
1114 HvARRAY(PL_strtab) = 0;
1115 HvTOTALKEYS(PL_strtab) = 0;
1116 HvFILL(PL_strtab) = 0;
1118 SvREFCNT_dec(PL_strtab);
1121 /* free the pointer tables used for cloning */
1122 ptr_table_free(PL_ptr_table);
1123 PL_ptr_table = (PTR_TBL_t*)NULL;
1126 /* free special SVs */
1128 SvREFCNT(&PL_sv_yes) = 0;
1129 sv_clear(&PL_sv_yes);
1130 SvANY(&PL_sv_yes) = NULL;
1131 SvFLAGS(&PL_sv_yes) = 0;
1133 SvREFCNT(&PL_sv_no) = 0;
1134 sv_clear(&PL_sv_no);
1135 SvANY(&PL_sv_no) = NULL;
1136 SvFLAGS(&PL_sv_no) = 0;
1140 for (i=0; i<=2; i++) {
1141 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1142 sv_clear(PERL_DEBUG_PAD(i));
1143 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1144 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1148 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1149 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1151 #ifdef DEBUG_LEAKING_SCALARS
1152 if (PL_sv_count != 0) {
1157 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1158 svend = &sva[SvREFCNT(sva)];
1159 for (sv = sva + 1; sv < svend; ++sv) {
1160 if (SvTYPE(sv) != SVTYPEMASK) {
1161 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1163 " refcnt=%"UVuf pTHX__FORMAT "\n"
1164 "\tallocated at %s:%d %s %s%s\n",
1165 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1167 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1169 sv->sv_debug_inpad ? "for" : "by",
1170 sv->sv_debug_optype ?
1171 PL_op_name[sv->sv_debug_optype]: "(none)",
1172 sv->sv_debug_cloned ? " (cloned)" : ""
1174 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1175 Perl_dump_sv_child(aTHX_ sv);
1181 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1185 /* Wait for up to 4 seconds for child to terminate.
1186 This seems to be the least effort way of timing out on reaping
1188 struct timeval waitfor = {4, 0};
1189 int sock = PL_dumper_fd;
1193 FD_SET(sock, &rset);
1194 select(sock + 1, &rset, NULL, NULL, &waitfor);
1195 waitpid(child, &status, WNOHANG);
1200 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1206 #ifdef PERL_DEBUG_READONLY_OPS
1212 #if defined(PERLIO_LAYERS)
1213 /* No more IO - including error messages ! */
1214 PerlIO_cleanup(aTHX);
1217 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1218 as currently layers use it rather than NULL as a marker
1219 for no arg - and will try and SvREFCNT_dec it.
1221 SvREFCNT(&PL_sv_undef) = 0;
1222 SvREADONLY_off(&PL_sv_undef);
1224 Safefree(PL_origfilename);
1225 PL_origfilename = NULL;
1226 Safefree(PL_reg_start_tmp);
1227 PL_reg_start_tmp = (char**)NULL;
1228 PL_reg_start_tmpl = 0;
1229 Safefree(PL_reg_curpm);
1230 Safefree(PL_reg_poscache);
1231 free_tied_hv_pool();
1232 Safefree(PL_op_mask);
1233 Safefree(PL_psig_name);
1234 PL_psig_name = (SV**)NULL;
1235 PL_psig_ptr = (SV**)NULL;
1236 Safefree(PL_psig_pend);
1237 PL_psig_pend = (int*)NULL;
1239 /* We need to NULL PL_psig_pend first, so that
1240 signal handlers know not to use it */
1241 int *psig_save = PL_psig_pend;
1242 PL_psig_pend = (int*)NULL;
1243 Safefree(psig_save);
1247 PL_tainting = FALSE;
1248 PL_taint_warn = FALSE;
1249 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1252 DEBUG_P(debprofdump());
1254 #ifdef USE_REENTRANT_API
1255 Perl_reentrant_free(aTHX);
1260 while (PL_regmatch_slab) {
1261 regmatch_slab *s = PL_regmatch_slab;
1262 PL_regmatch_slab = PL_regmatch_slab->next;
1266 /* As the absolutely last thing, free the non-arena SV for mess() */
1269 /* we know that type == SVt_PVMG */
1271 /* it could have accumulated taint magic */
1274 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1275 moremagic = mg->mg_moremagic;
1276 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1278 Safefree(mg->mg_ptr);
1282 /* we know that type >= SVt_PV */
1283 SvPV_free(PL_mess_sv);
1284 Safefree(SvANY(PL_mess_sv));
1285 Safefree(PL_mess_sv);
1292 =for apidoc perl_free
1294 Releases a Perl interpreter. See L<perlembed>.
1304 PERL_ARGS_ASSERT_PERL_FREE;
1306 if (PL_veto_cleanup)
1309 #ifdef PERL_TRACK_MEMPOOL
1312 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1313 * value as we're probably hunting memory leaks then
1315 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1316 if (!s || atoi(s) == 0) {
1317 const U32 old_debug = PL_debug;
1318 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1319 thread at thread exit. */
1321 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1322 "free this thread's memory\n");
1323 PL_debug &= ~ DEBUG_m_FLAG;
1325 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1326 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1327 PL_debug = old_debug;
1332 #if defined(WIN32) || defined(NETWARE)
1333 # if defined(PERL_IMPLICIT_SYS)
1336 void *host = nw_internal_host;
1338 void *host = w32_internal_host;
1340 PerlMem_free(aTHXx);
1342 nw_delete_internal_host(host);
1344 win32_delete_internal_host(host);
1348 PerlMem_free(aTHXx);
1351 PerlMem_free(aTHXx);
1355 #if defined(USE_ITHREADS)
1356 /* provide destructors to clean up the thread key when libperl is unloaded */
1357 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1359 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1360 #pragma fini "perl_fini"
1361 #elif defined(__sun) && !defined(__GNUC__)
1362 #pragma fini (perl_fini)
1366 #if defined(__GNUC__)
1367 __attribute__((destructor))
1372 if (PL_curinterp && !PL_veto_cleanup)
1377 #endif /* THREADS */
1380 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1383 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1384 PL_exitlist[PL_exitlistlen].fn = fn;
1385 PL_exitlist[PL_exitlistlen].ptr = ptr;
1389 #ifdef HAS_PROCSELFEXE
1390 /* This is a function so that we don't hold on to MAXPATHLEN
1391 bytes of stack longer than necessary
1394 S_procself_val(pTHX_ SV *sv, const char *arg0)
1396 char buf[MAXPATHLEN];
1397 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1399 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1400 includes a spurious NUL which will cause $^X to fail in system
1401 or backticks (this will prevent extensions from being built and
1402 many tests from working). readlink is not meant to add a NUL.
1403 Normal readlink works fine.
1405 if (len > 0 && buf[len-1] == '\0') {
1409 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1410 returning the text "unknown" from the readlink rather than the path
1411 to the executable (or returning an error from the readlink). Any valid
1412 path has a '/' in it somewhere, so use that to validate the result.
1413 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1415 if (len > 0 && memchr(buf, '/', len)) {
1416 sv_setpvn(sv,buf,len);
1422 #endif /* HAS_PROCSELFEXE */
1425 S_set_caret_X(pTHX) {
1427 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1429 #ifdef HAS_PROCSELFEXE
1430 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1433 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1435 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1442 =for apidoc perl_parse
1444 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1450 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1457 PERL_ARGS_ASSERT_PERL_PARSE;
1458 #ifndef MULTIPLICITY
1459 PERL_UNUSED_ARG(my_perl);
1462 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1463 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1464 * This MUST be done before any hash stores or fetches take place.
1465 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1466 * yourself, it is your responsibility to provide a good random seed!
1467 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1468 if (!PL_rehash_seed_set)
1469 PL_rehash_seed = get_hash_seed();
1471 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1473 if (s && (atoi(s) == 1))
1474 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1476 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1481 if (PL_origalen != 0) {
1482 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1485 /* Set PL_origalen be the sum of the contiguous argv[]
1486 * elements plus the size of the env in case that it is
1487 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1488 * as the maximum modifiable length of $0. In the worst case
1489 * the area we are able to modify is limited to the size of
1490 * the original argv[0]. (See below for 'contiguous', though.)
1492 const char *s = NULL;
1495 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1496 /* Do the mask check only if the args seem like aligned. */
1498 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1500 /* See if all the arguments are contiguous in memory. Note
1501 * that 'contiguous' is a loose term because some platforms
1502 * align the argv[] and the envp[]. If the arguments look
1503 * like non-aligned, assume that they are 'strictly' or
1504 * 'traditionally' contiguous. If the arguments look like
1505 * aligned, we just check that they are within aligned
1506 * PTRSIZE bytes. As long as no system has something bizarre
1507 * like the argv[] interleaved with some other data, we are
1508 * fine. (Did I just evoke Murphy's Law?) --jhi */
1509 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1511 for (i = 1; i < PL_origargc; i++) {
1512 if ((PL_origargv[i] == s + 1
1514 || PL_origargv[i] == s + 2
1519 (PL_origargv[i] > s &&
1521 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1532 #ifndef PERL_USE_SAFE_PUTENV
1533 /* Can we grab env area too to be used as the area for $0? */
1534 if (s && PL_origenviron && !PL_use_safe_putenv) {
1535 if ((PL_origenviron[0] == s + 1)
1538 (PL_origenviron[0] > s &&
1539 PL_origenviron[0] <=
1540 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1543 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1544 s = PL_origenviron[0];
1547 my_setenv("NoNe SuCh", NULL);
1548 /* Force copy of environment. */
1549 for (i = 1; PL_origenviron[i]; i++) {
1550 if (PL_origenviron[i] == s + 1
1553 (PL_origenviron[i] > s &&
1554 PL_origenviron[i] <=
1555 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1558 s = PL_origenviron[i];
1566 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1568 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1573 /* Come here if running an undumped a.out. */
1575 PL_origfilename = savepv(argv[0]);
1576 PL_do_undump = FALSE;
1577 cxstack_ix = -1; /* start label stack again */
1579 assert (!PL_tainted);
1581 S_set_caret_X(aTHX);
1583 init_postdump_symbols(argc,argv,env);
1588 op_free(PL_main_root);
1589 PL_main_root = NULL;
1591 PL_main_start = NULL;
1592 SvREFCNT_dec(PL_main_cv);
1596 oldscope = PL_scopestack_ix;
1597 PL_dowarn = G_WARN_OFF;
1602 parse_body(env,xsinit);
1604 call_list(oldscope, PL_unitcheckav);
1606 call_list(oldscope, PL_checkav);
1613 /* my_exit() was called */
1614 while (PL_scopestack_ix > oldscope)
1617 PL_curstash = PL_defstash;
1619 call_list(oldscope, PL_unitcheckav);
1621 call_list(oldscope, PL_checkav);
1625 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1633 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1634 miniperl, and we need to see those flags reflected in the values here. */
1636 /* What this returns is subject to change. Use the public interface in Config.
1639 S_Internals_V(pTHX_ CV *cv)
1642 #ifdef LOCAL_PATCH_COUNT
1643 const int local_patch_count = LOCAL_PATCH_COUNT;
1645 const int local_patch_count = 0;
1647 const int entries = 3 + local_patch_count;
1649 static char non_bincompat_options[] =
1656 # ifdef PERL_DISABLE_PMC
1659 # ifdef PERL_DONT_CREATE_GVSV
1660 " PERL_DONT_CREATE_GVSV"
1662 # ifdef PERL_IS_MINIPERL
1665 # ifdef PERL_MALLOC_WRAP
1668 # ifdef PERL_MEM_LOG
1671 # ifdef PERL_MEM_LOG_NOIMPL
1672 " PERL_MEM_LOG_NOIMPL"
1674 # ifdef PERL_USE_DEVEL
1677 # ifdef PERL_USE_SAFE_PUTENV
1678 " PERL_USE_SAFE_PUTENV"
1680 # ifdef USE_SITECUSTOMIZE
1681 " USE_SITECUSTOMIZE"
1683 # ifdef USE_FAST_STDIO
1687 PERL_UNUSED_ARG(cv);
1688 PERL_UNUSED_ARG(items);
1690 EXTEND(SP, entries);
1692 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1693 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1694 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1698 PUSHs(Perl_newSVpvn_flags(aTHX_
1699 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1702 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1706 PUSHs(&PL_sv_undef);
1709 for (i = 1; i <= local_patch_count; i++) {
1710 /* This will be an undef, if PL_localpatches[i] is NULL. */
1711 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1717 #define INCPUSH_UNSHIFT 0x01
1718 #define INCPUSH_ADD_OLD_VERS 0x02
1719 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1720 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1721 #define INCPUSH_NOT_BASEDIR 0x10
1722 #define INCPUSH_CAN_RELOCATE 0x20
1723 #define INCPUSH_ADD_SUB_DIRS \
1724 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1727 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1731 int argc = PL_origargc;
1732 char **argv = PL_origargv;
1733 const char *scriptname = NULL;
1734 VOL bool dosearch = FALSE;
1736 const char *cddir = NULL;
1737 #ifdef USE_SITECUSTOMIZE
1738 bool minus_f = FALSE;
1740 SV *linestr_sv = newSV_type(SVt_PVIV);
1741 bool add_read_e_script = FALSE;
1743 SvGROW(linestr_sv, 80);
1744 sv_setpvs(linestr_sv,"");
1750 for (argc--,argv++; argc > 0; argc--,argv++) {
1751 if (argv[0][0] != '-' || !argv[0][1])
1757 #ifndef PERL_STRICT_CR
1781 if ((s = moreswitches(s)))
1786 CHECK_MALLOC_TOO_LATE_FOR('t');
1787 if( !PL_tainting ) {
1788 PL_taint_warn = TRUE;
1794 CHECK_MALLOC_TOO_LATE_FOR('T');
1796 PL_taint_warn = FALSE;
1804 forbid_setid('e', FALSE);
1806 PL_e_script = newSVpvs("");
1807 add_read_e_script = TRUE;
1810 sv_catpv(PL_e_script, s);
1812 sv_catpv(PL_e_script, argv[1]);
1816 Perl_croak(aTHX_ "No code specified for -%c", c);
1817 sv_catpvs(PL_e_script, "\n");
1821 #ifdef USE_SITECUSTOMIZE
1827 case 'I': /* -I handled both here and in moreswitches() */
1828 forbid_setid('I', FALSE);
1829 if (!*++s && (s=argv[1]) != NULL) {
1833 STRLEN len = strlen(s);
1834 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1837 Perl_croak(aTHX_ "No directory specified for -I");
1840 forbid_setid('S', FALSE);
1849 opts_prog = newSVpvs("use Config; Config::_V()");
1853 opts_prog = Perl_newSVpvf(aTHX_
1854 "use Config; Config::config_vars(qw%c%s%c)",
1858 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1859 /* don't look for script or read stdin */
1860 scriptname = BIT_BUCKET;
1864 PL_doextract = TRUE;
1872 if (!*++s || isSPACE(*s)) {
1876 /* catch use of gnu style long options */
1877 if (strEQ(s, "version")) {
1881 if (strEQ(s, "help")) {
1888 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1899 #ifndef SECURE_INTERNAL_GETENV
1902 (s = PerlEnv_getenv("PERL5OPT")))
1906 if (*s == '-' && *(s+1) == 'T') {
1907 CHECK_MALLOC_TOO_LATE_FOR('T');
1909 PL_taint_warn = FALSE;
1912 char *popt_copy = NULL;
1925 if (!strchr("CDIMUdmtwW", *s))
1926 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1930 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1931 s = popt_copy + (s - d);
1939 if( !PL_tainting ) {
1940 PL_taint_warn = TRUE;
1951 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1953 /* SITELIB_EXP is a function call on Win32.
1954 The games with local $! are to avoid setting errno if there is no
1955 sitecustomize script. */
1956 const char *const sitelib = SITELIB_EXP;
1957 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1959 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1964 scriptname = argv[0];
1967 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1969 else if (scriptname == NULL) {
1971 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1977 /* Set $^X early so that it can be used for relocatable paths in @INC */
1978 assert (!PL_tainted);
1980 S_set_caret_X(aTHX);
1985 bool suidscript = FALSE;
1987 open_script(scriptname, dosearch, &suidscript, &rsfp);
1989 validate_suid(validarg, scriptname, fdscript, suidscript,
1993 # if defined(SIGCHLD) || defined(SIGCLD)
1996 # define SIGCHLD SIGCLD
1998 Sighandler_t sigstate = rsignal_state(SIGCHLD);
1999 if (sigstate == (Sighandler_t) SIG_IGN) {
2000 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2001 "Can't ignore signal CHLD, forcing to default");
2002 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2010 /* This will croak if suidscript is true, as -x cannot be used with
2012 forbid_setid('x', suidscript);
2013 /* Hence you can't get here if suidscript is true */
2015 find_beginning(linestr_sv, rsfp);
2016 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2017 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2021 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2022 CvUNIQUE_on(PL_compcv);
2024 CvPADLIST(PL_compcv) = pad_new(0);
2026 PL_isarev = newHV();
2029 boot_core_UNIVERSAL();
2031 newXS("Internals::V", S_Internals_V, __FILE__);
2034 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2036 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2042 # ifdef HAS_SOCKS5_INIT
2043 socks5_init(argv[0]);
2049 init_predump_symbols();
2050 /* init_postdump_symbols not currently designed to be called */
2051 /* more than once (ENV isn't cleared first, for example) */
2052 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2054 init_postdump_symbols(argc,argv,env);
2056 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2057 * or explicitly in some platforms.
2058 * locale.c:Perl_init_i18nl10n() if the environment
2059 * look like the user wants to use UTF-8. */
2060 #if defined(__SYMBIAN32__)
2061 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2063 # ifndef PERL_IS_MINIPERL
2065 /* Requires init_predump_symbols(). */
2066 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2071 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2072 * and the default open disciplines. */
2073 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2074 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2076 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2077 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2078 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2080 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2081 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2082 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2084 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2085 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2086 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2088 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2089 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2092 sv_setpvs(sv, ":utf8\0:utf8");
2094 sv_setpvs(sv, ":utf8\0");
2097 sv_setpvs(sv, "\0:utf8");
2106 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2107 if (strEQ(s, "unsafe"))
2108 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2109 else if (strEQ(s, "safe"))
2110 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2112 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2119 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2123 PL_xmlfp = PerlIO_stdout();
2125 PL_xmlfp = PerlIO_open(s, "w");
2127 Perl_croak(aTHX_ "Can't open %s", s);
2129 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2135 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2136 PL_madskills = atoi(s);
2137 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2142 lex_start(linestr_sv, rsfp, TRUE);
2143 PL_subname = newSVpvs("main");
2145 if (add_read_e_script)
2146 filter_add(read_e_script, NULL);
2148 /* now parse the script */
2150 SETERRNO(0,SS_NORMAL);
2151 if (yyparse() || PL_parser->error_count) {
2153 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2155 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2159 CopLINE_set(PL_curcop, 0);
2160 PL_curstash = PL_defstash;
2162 SvREFCNT_dec(PL_e_script);
2170 SAVECOPFILE(PL_curcop);
2171 SAVECOPLINE(PL_curcop);
2172 gv_check(PL_defstash);
2181 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2182 dump_mstats("after compilation:");
2192 =for apidoc perl_run
2194 Tells a Perl interpreter to run. See L<perlembed>.
2207 PERL_ARGS_ASSERT_PERL_RUN;
2208 #ifndef MULTIPLICITY
2209 PERL_UNUSED_ARG(my_perl);
2212 oldscope = PL_scopestack_ix;
2220 cxstack_ix = -1; /* start context stack again */
2222 case 0: /* normal completion */
2226 case 2: /* my_exit() */
2227 while (PL_scopestack_ix > oldscope)
2230 PL_curstash = PL_defstash;
2231 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2232 PL_endav && !PL_minus_c)
2233 call_list(oldscope, PL_endav);
2235 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2236 dump_mstats("after execution: ");
2242 POPSTACK_TO(PL_mainstack);
2245 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2256 S_run_body(pTHX_ I32 oldscope)
2259 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2260 PL_sawampersand ? "Enabling" : "Omitting"));
2262 if (!PL_restartop) {
2266 exit(0); /* less likely to core dump than my_exit(0) */
2270 if (DEBUG_x_TEST || DEBUG_B_TEST)
2271 dump_all_perl(!DEBUG_B_TEST);
2273 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2277 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2280 if (PERLDB_SINGLE && PL_DBsingle)
2281 sv_setiv(PL_DBsingle, 1);
2283 call_list(oldscope, PL_initav);
2284 #ifdef PERL_DEBUG_READONLY_OPS
2285 Perl_pending_Slabs_to_ro(aTHX);
2292 PL_op = PL_restartop;
2296 else if (PL_main_start) {
2297 CvDEPTH(PL_main_cv) = 1;
2298 PL_op = PL_main_start;
2306 =head1 SV Manipulation Functions
2308 =for apidoc p||get_sv
2310 Returns the SV of the specified Perl scalar. C<flags> are passed to
2311 C<gv_fetchpv>. If C<GV_ADD> is set and the
2312 Perl variable does not exist then it will be created. If C<flags> is zero
2313 and the variable does not exist then NULL is returned.
2319 Perl_get_sv(pTHX_ const char *name, I32 flags)
2323 PERL_ARGS_ASSERT_GET_SV;
2325 gv = gv_fetchpv(name, flags, SVt_PV);
2332 =head1 Array Manipulation Functions
2334 =for apidoc p||get_av
2336 Returns the AV of the specified Perl array. C<flags> are passed to
2337 C<gv_fetchpv>. If C<GV_ADD> is set and the
2338 Perl variable does not exist then it will be created. If C<flags> is zero
2339 and the variable does not exist then NULL is returned.
2345 Perl_get_av(pTHX_ const char *name, I32 flags)
2347 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2349 PERL_ARGS_ASSERT_GET_AV;
2359 =head1 Hash Manipulation Functions
2361 =for apidoc p||get_hv
2363 Returns the HV of the specified Perl hash. C<flags> are passed to
2364 C<gv_fetchpv>. If C<GV_ADD> is set and the
2365 Perl variable does not exist then it will be created. If C<flags> is zero
2366 and the variable does not exist then NULL is returned.
2372 Perl_get_hv(pTHX_ const char *name, I32 flags)
2374 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2376 PERL_ARGS_ASSERT_GET_HV;
2386 =head1 CV Manipulation Functions
2388 =for apidoc p||get_cvn_flags
2390 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2391 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2392 exist then it will be declared (which has the same effect as saying
2393 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2394 then NULL is returned.
2396 =for apidoc p||get_cv
2398 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2404 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2406 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2407 /* XXX this is probably not what they think they're getting.
2408 * It has the same effect as "sub name;", i.e. just a forward
2411 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2413 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2414 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2415 return newSUB(start_subparse(FALSE, 0),
2416 newSVOP(OP_CONST, 0, sv),
2424 /* Nothing in core calls this now, but we can't replace it with a macro and
2425 move it to mathoms.c as a macro would evaluate name twice. */
2427 Perl_get_cv(pTHX_ const char *name, I32 flags)
2429 PERL_ARGS_ASSERT_GET_CV;
2431 return get_cvn_flags(name, strlen(name), flags);
2434 /* Be sure to refetch the stack pointer after calling these routines. */
2438 =head1 Callback Functions
2440 =for apidoc p||call_argv
2442 Performs a callback to the specified Perl sub. See L<perlcall>.
2448 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2450 /* See G_* flags in cop.h */
2451 /* null terminated arg list */
2456 PERL_ARGS_ASSERT_CALL_ARGV;
2461 mXPUSHs(newSVpv(*argv,0));
2466 return call_pv(sub_name, flags);
2470 =for apidoc p||call_pv
2472 Performs a callback to the specified Perl sub. See L<perlcall>.
2478 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2479 /* name of the subroutine */
2480 /* See G_* flags in cop.h */
2482 PERL_ARGS_ASSERT_CALL_PV;
2484 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2488 =for apidoc p||call_method
2490 Performs a callback to the specified Perl method. The blessed object must
2491 be on the stack. See L<perlcall>.
2497 Perl_call_method(pTHX_ const char *methname, I32 flags)
2498 /* name of the subroutine */
2499 /* See G_* flags in cop.h */
2502 PERL_ARGS_ASSERT_CALL_METHOD;
2504 len = strlen(methname);
2506 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2507 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2510 /* May be called with any of a CV, a GV, or an SV containing the name. */
2512 =for apidoc p||call_sv
2514 Performs a callback to the Perl sub whose name is in the SV. See
2521 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2522 /* See G_* flags in cop.h */
2525 LOGOP myop; /* fake syntax tree node */
2530 bool oldcatch = CATCH_GET;
2532 OP* const oldop = PL_op;
2535 PERL_ARGS_ASSERT_CALL_SV;
2537 if (flags & G_DISCARD) {
2541 if (!(flags & G_WANT)) {
2542 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2547 Zero(&myop, 1, LOGOP);
2548 myop.op_next = NULL;
2549 if (!(flags & G_NOARGS))
2550 myop.op_flags |= OPf_STACKED;
2551 myop.op_flags |= OP_GIMME_REVERSE(flags);
2555 EXTEND(PL_stack_sp, 1);
2556 *++PL_stack_sp = sv;
2558 oldscope = PL_scopestack_ix;
2560 if (PERLDB_SUB && PL_curstash != PL_debstash
2561 /* Handle first BEGIN of -d. */
2562 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2563 /* Try harder, since this may have been a sighandler, thus
2564 * curstash may be meaningless. */
2565 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2566 && !(flags & G_NODEBUG))
2567 PL_op->op_private |= OPpENTERSUB_DB;
2569 if (flags & G_METHOD) {
2570 Zero(&method_op, 1, UNOP);
2571 method_op.op_next = PL_op;
2572 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2573 method_op.op_type = OP_METHOD;
2574 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2575 myop.op_type = OP_ENTERSUB;
2576 PL_op = (OP*)&method_op;
2579 if (!(flags & G_EVAL)) {
2581 CALL_BODY_SUB((OP*)&myop);
2582 retval = PL_stack_sp - (PL_stack_base + oldmark);
2583 CATCH_SET(oldcatch);
2586 myop.op_other = (OP*)&myop;
2588 create_eval_scope(flags|G_FAKINGEVAL);
2596 CALL_BODY_SUB((OP*)&myop);
2597 retval = PL_stack_sp - (PL_stack_base + oldmark);
2598 if (!(flags & G_KEEPERR)) {
2606 /* my_exit() was called */
2607 PL_curstash = PL_defstash;
2610 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2611 Perl_croak(aTHX_ "Callback called exit");
2616 PL_op = PL_restartop;
2620 PL_stack_sp = PL_stack_base + oldmark;
2621 if ((flags & G_WANT) == G_ARRAY)
2625 *++PL_stack_sp = &PL_sv_undef;
2630 if (PL_scopestack_ix > oldscope)
2631 delete_eval_scope();
2635 if (flags & G_DISCARD) {
2636 PL_stack_sp = PL_stack_base + oldmark;
2645 /* Eval a string. The G_EVAL flag is always assumed. */
2648 =for apidoc p||eval_sv
2650 Tells Perl to C<eval> the string in the SV.
2656 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2658 /* See G_* flags in cop.h */
2662 UNOP myop; /* fake syntax tree node */
2663 VOL I32 oldmark = SP - PL_stack_base;
2666 OP* const oldop = PL_op;
2669 PERL_ARGS_ASSERT_EVAL_SV;
2671 if (flags & G_DISCARD) {
2678 Zero(PL_op, 1, UNOP);
2679 EXTEND(PL_stack_sp, 1);
2680 *++PL_stack_sp = sv;
2682 if (!(flags & G_NOARGS))
2683 myop.op_flags = OPf_STACKED;
2684 myop.op_next = NULL;
2685 myop.op_type = OP_ENTEREVAL;
2686 myop.op_flags |= OP_GIMME_REVERSE(flags);
2687 if (flags & G_KEEPERR)
2688 myop.op_flags |= OPf_SPECIAL;
2690 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2691 * before a PUSHEVAL, which corrupts the stack after a croak */
2692 TAINT_PROPER("eval_sv()");
2698 CALL_BODY_EVAL((OP*)&myop);
2699 retval = PL_stack_sp - (PL_stack_base + oldmark);
2700 if (!(flags & G_KEEPERR)) {
2708 /* my_exit() was called */
2709 PL_curstash = PL_defstash;
2712 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2713 Perl_croak(aTHX_ "Callback called exit");
2718 PL_op = PL_restartop;
2722 PL_stack_sp = PL_stack_base + oldmark;
2723 if ((flags & G_WANT) == G_ARRAY)
2727 *++PL_stack_sp = &PL_sv_undef;
2733 if (flags & G_DISCARD) {
2734 PL_stack_sp = PL_stack_base + oldmark;
2744 =for apidoc p||eval_pv
2746 Tells Perl to C<eval> the given string and return an SV* result.
2752 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2756 SV* sv = newSVpv(p, 0);
2758 PERL_ARGS_ASSERT_EVAL_PV;
2760 eval_sv(sv, G_SCALAR);
2767 if (croak_on_error && SvTRUE(ERRSV)) {
2768 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2774 /* Require a module. */
2777 =head1 Embedding Functions
2779 =for apidoc p||require_pv
2781 Tells Perl to C<require> the file named by the string argument. It is
2782 analogous to the Perl code C<eval "require '$file'">. It's even
2783 implemented that way; consider using load_module instead.
2788 Perl_require_pv(pTHX_ const char *pv)
2794 PERL_ARGS_ASSERT_REQUIRE_PV;
2796 PUSHSTACKi(PERLSI_REQUIRE);
2798 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2799 eval_sv(sv_2mortal(sv), G_DISCARD);
2805 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2807 /* This message really ought to be max 23 lines.
2808 * Removed -h because the user already knows that option. Others? */
2810 static const char * const usage_msg[] = {
2811 "-0[octal] specify record separator (\\0, if no argument)",
2812 "-a autosplit mode with -n or -p (splits $_ into @F)",
2813 "-C[number/list] enables the listed Unicode features",
2814 "-c check syntax only (runs BEGIN and CHECK blocks)",
2815 "-d[:debugger] run program under debugger",
2816 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2817 "-e program one line of program (several -e's allowed, omit programfile)",
2818 "-E program like -e, but enables all optional features",
2819 "-f don't do $sitelib/sitecustomize.pl at startup",
2820 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2821 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2822 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2823 "-l[octal] enable line ending processing, specifies line terminator",
2824 "-[mM][-]module execute \"use/no module...\" before executing program",
2825 "-n assume \"while (<>) { ... }\" loop around program",
2826 "-p assume loop like -n but print line also, like sed",
2827 "-s enable rudimentary parsing for switches after programfile",
2828 "-S look for programfile using PATH environment variable",
2829 "-t enable tainting warnings",
2830 "-T enable tainting checks",
2831 "-u dump core after parsing program",
2832 "-U allow unsafe operations",
2833 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2834 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2835 "-w enable many useful warnings (RECOMMENDED)",
2836 "-W enable all warnings",
2837 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2838 "-X disable all warnings",
2842 const char * const *p = usage_msg;
2844 PERL_ARGS_ASSERT_USAGE;
2846 PerlIO_printf(PerlIO_stdout(),
2847 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2850 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2853 /* convert a string of -D options (or digits) into an int.
2854 * sets *s to point to the char after the options */
2858 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2860 static const char * const usage_msgd[] = {
2861 " Debugging flag values: (see also -d)",
2862 " p Tokenizing and parsing (with v, displays parse stack)",
2863 " s Stack snapshots (with v, displays all stacks)",
2864 " l Context (loop) stack processing",
2865 " t Trace execution",
2866 " o Method and overloading resolution",
2867 " c String/numeric conversions",
2868 " P Print profiling info, source file input state",
2869 " m Memory and SV allocation",
2870 " f Format processing",
2871 " r Regular expression parsing and execution",
2872 " x Syntax tree dump",
2873 " u Tainting checks",
2874 " H Hash dump -- usurps values()",
2875 " X Scratchpad allocation",
2878 " R Include reference counts of dumped variables (eg when using -Ds)",
2879 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2880 " v Verbose: use in conjunction with other flags",
2882 " A Consistency checks on internal structures",
2883 " q quiet - currently only suppresses the 'EXECUTING' message",
2884 " M trace smart match resolution",
2885 " B dump suBroutine definitions, including special Blocks like BEGIN",
2890 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2893 /* if adding extra options, remember to update DEBUG_MASK */
2894 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2896 for (; isALNUM(**s); (*s)++) {
2897 const char * const d = strchr(debopts,**s);
2899 i |= 1 << (d - debopts);
2900 else if (ckWARN_d(WARN_DEBUGGING))
2901 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2902 "invalid option -D%c, use -D'' to see choices\n", **s);
2905 else if (isDIGIT(**s)) {
2907 for (; isALNUM(**s); (*s)++) ;
2909 else if (givehelp) {
2910 const char *const *p = usage_msgd;
2911 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2914 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2915 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2916 "-Dp not implemented on this platform\n");
2922 /* This routine handles any switches that can be given during run */
2925 Perl_moreswitches(pTHX_ const char *s)
2929 const char option = *s; /* used to remember option in -m/-M code */
2931 PERL_ARGS_ASSERT_MORESWITCHES;
2939 SvREFCNT_dec(PL_rs);
2940 if (s[1] == 'x' && s[2]) {
2941 const char *e = s+=2;
2947 flags = PERL_SCAN_SILENT_ILLDIGIT;
2948 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2949 if (s + numlen < e) {
2950 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2954 PL_rs = newSVpvs("");
2955 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2956 tmps = (U8*)SvPVX(PL_rs);
2957 uvchr_to_utf8(tmps, rschar);
2958 SvCUR_set(PL_rs, UNISKIP(rschar));
2963 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2964 if (rschar & ~((U8)~0))
2965 PL_rs = &PL_sv_undef;
2966 else if (!rschar && numlen >= 2)
2967 PL_rs = newSVpvs("");
2969 char ch = (char)rschar;
2970 PL_rs = newSVpvn(&ch, 1);
2973 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2978 PL_unicode = parse_unicode_opts( (const char **)&s );
2979 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2985 while (*s && !isSPACE(*s)) ++s;
2986 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2997 forbid_setid('d', FALSE);
3000 /* -dt indicates to the debugger that threads will be used */
3001 if (*s == 't' && !isALNUM(s[1])) {
3003 my_setenv("PERL5DB_THREADED", "1");
3006 /* The following permits -d:Mod to accepts arguments following an =
3007 in the fashion that -MSome::Mod does. */
3008 if (*s == ':' || *s == '=') {
3009 const char *start = ++s;
3010 const char *const end = s + strlen(s);
3011 SV * const sv = newSVpvs("use Devel::");
3013 /* We now allow -d:Module=Foo,Bar */
3014 while(isALNUM(*s) || *s==':') ++s;
3016 sv_catpvn(sv, start, end - start);
3018 sv_catpvn(sv, start, s-start);
3019 /* Don't use NUL as q// delimiter here, this string goes in the
3021 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3024 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3028 PL_perldb = PERLDB_ALL;
3035 forbid_setid('D', FALSE);
3037 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3038 #else /* !DEBUGGING */
3039 if (ckWARN_d(WARN_DEBUGGING))
3040 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3041 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3042 for (s++; isALNUM(*s); s++) ;
3047 usage(PL_origargv[0]);
3050 Safefree(PL_inplace);
3051 #if defined(__CYGWIN__) /* do backup extension automagically */
3052 if (*(s+1) == '\0') {
3053 PL_inplace = savepvs(".bak");
3056 #endif /* __CYGWIN__ */
3058 const char * const start = ++s;
3059 while (*s && !isSPACE(*s))
3062 PL_inplace = savepvn(start, s - start);
3066 if (*s == '-') /* Additional switches on #! line. */
3070 case 'I': /* -I handled both here and in parse_body() */
3071 forbid_setid('I', FALSE);
3073 while (*s && isSPACE(*s))
3078 /* ignore trailing spaces (possibly followed by other switches) */
3080 for (e = p; *e && !isSPACE(*e); e++) ;
3084 } while (*p && *p != '-');
3086 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3092 Perl_croak(aTHX_ "No directory specified for -I");
3098 SvREFCNT_dec(PL_ors_sv);
3104 PL_ors_sv = newSVpvs("\n");
3105 numlen = 3 + (*s == '0');
3106 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3110 if (RsPARA(PL_rs)) {
3111 PL_ors_sv = newSVpvs("\n\n");
3114 PL_ors_sv = newSVsv(PL_rs);
3119 forbid_setid('M', FALSE); /* XXX ? */
3122 forbid_setid('m', FALSE); /* XXX ? */
3127 const char *use = "use ";
3129 /* -M-foo == 'no foo' */
3130 /* Leading space on " no " is deliberate, to make both
3131 possibilities the same length. */
3132 if (*s == '-') { use = " no "; ++s; }
3133 sv = newSVpvn(use,4);
3135 /* We allow -M'Module qw(Foo Bar)' */
3136 while(isALNUM(*s) || *s==':') {
3145 Perl_croak(aTHX_ "Module name required with -%c option",
3148 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3149 "contains single ':'",
3150 (int)(s - start), start, option);
3151 end = s + strlen(s);
3153 sv_catpvn(sv, start, end - start);
3154 if (option == 'm') {
3156 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3157 sv_catpvs( sv, " ()");
3160 sv_catpvn(sv, start, s-start);
3161 /* Use NUL as q''-delimiter. */
3162 sv_catpvs(sv, " split(/,/,q\0");
3164 sv_catpvn(sv, s, end - s);
3165 sv_catpvs(sv, "\0)");
3168 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3171 Perl_croak(aTHX_ "Missing argument to -%c", option);
3182 forbid_setid('s', FALSE);
3183 PL_doswitches = TRUE;
3197 PL_do_undump = TRUE;
3205 if (!sv_derived_from(PL_patchlevel, "version"))
3206 upg_version(PL_patchlevel, TRUE);
3209 SV* level= vstringify(PL_patchlevel);
3210 #ifdef PERL_PATCHNUM
3211 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3212 SV *num = newSVpvs(PERL_PATCHNUM "*");
3214 SV *num = newSVpvs(PERL_PATCHNUM);
3217 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3218 SvREFCNT_dec(level);
3221 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3225 PerlIO_printf(PerlIO_stdout(),
3226 "\nThis is perl, %"SVf
3227 " built for " ARCHNAME,
3229 SvREFCNT_dec(level);
3232 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3233 PerlIO_printf(PerlIO_stdout(),
3234 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3235 SVfARG(vstringify(PL_patchlevel))));
3236 PerlIO_printf(PerlIO_stdout(),
3237 Perl_form(aTHX_ " built under %s at %s %s\n",
3238 OSNAME, __DATE__, __TIME__));
3239 PerlIO_printf(PerlIO_stdout(),
3240 Perl_form(aTHX_ " OS Specific Release: %s\n",
3243 #if defined(LOCAL_PATCH_COUNT)
3244 if (LOCAL_PATCH_COUNT > 0)
3245 PerlIO_printf(PerlIO_stdout(),
3246 "\n(with %d registered patch%s, "
3247 "see perl -V for more detail)",
3249 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3252 PerlIO_printf(PerlIO_stdout(),
3253 "\n\nCopyright 1987-2009, Larry Wall\n");
3255 PerlIO_printf(PerlIO_stdout(),
3256 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3261 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3266 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "atariST series port, ++jrb bammi@cadence.com\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "EPOC port by Olaf Flebbe, 1999-2002\n");
3301 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3302 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3305 #ifdef __SYMBIAN32__
3306 PerlIO_printf(PerlIO_stdout(),
3307 "Symbian port by Nokia, 2004-2005\n");
3309 #ifdef BINARY_BUILD_NOTICE
3310 BINARY_BUILD_NOTICE;
3312 PerlIO_printf(PerlIO_stdout(),
3314 Perl may be copied only under the terms of either the Artistic License or the\n\
3315 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3316 Complete documentation for Perl, including FAQ lists, should be found on\n\
3317 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3318 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3321 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3322 PL_dowarn |= G_WARN_ON;
3327 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3328 if (!specialWARN(PL_compiling.cop_warnings))
3329 PerlMemShared_free(PL_compiling.cop_warnings);
3330 PL_compiling.cop_warnings = pWARN_ALL ;
3334 PL_dowarn = G_WARN_ALL_OFF;
3335 if (!specialWARN(PL_compiling.cop_warnings))
3336 PerlMemShared_free(PL_compiling.cop_warnings);
3337 PL_compiling.cop_warnings = pWARN_NONE ;
3344 if (s[0] == '-') /* Additional switches on #! line. */
3349 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3355 #ifdef ALTERNATE_SHEBANG
3356 case 'S': /* OS/2 needs -S on "extproc" line. */
3360 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3365 /* compliments of Tom Christiansen */
3367 /* unexec() can be found in the Gnu emacs distribution */
3368 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3371 Perl_my_unexec(pTHX)
3373 PERL_UNUSED_CONTEXT;
3375 SV * prog = newSVpv(BIN_EXP, 0);
3376 SV * file = newSVpv(PL_origfilename, 0);
3380 sv_catpvs(prog, "/perl");
3381 sv_catpvs(file, ".perldump");
3383 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3384 /* unexec prints msg to stderr in case of failure */
3385 PerlProc_exit(status);
3388 # include <lib$routines.h>
3389 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3390 # elif defined(WIN32) || defined(__CYGWIN__)
3391 Perl_croak(aTHX_ "dump is not supported");
3393 ABORT(); /* for use with undump */
3398 /* initialize curinterp */
3404 # define PERLVAR(var,type)
3405 # define PERLVARA(var,n,type)
3406 # if defined(PERL_IMPLICIT_CONTEXT)
3407 # define PERLVARI(var,type,init) aTHX->var = init;
3408 # define PERLVARIC(var,type,init) aTHX->var = init;
3410 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3411 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3413 # include "intrpvar.h"
3419 # define PERLVAR(var,type)
3420 # define PERLVARA(var,n,type)
3421 # define PERLVARI(var,type,init) PL_##var = init;
3422 # define PERLVARIC(var,type,init) PL_##var = init;
3423 # include "intrpvar.h"
3430 /* As these are inside a structure, PERLVARI isn't capable of initialising
3432 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3433 PL_reg_poscache = PL_reg_starttry = NULL;
3437 S_init_main_stash(pTHX)
3442 PL_curstash = PL_defstash = newHV();
3443 /* We know that the string "main" will be in the global shared string
3444 table, so it's a small saving to use it rather than allocate another
3446 PL_curstname = newSVpvs_share("main");
3447 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3448 /* If we hadn't caused another reference to "main" to be in the shared
3449 string table above, then it would be worth reordering these two,
3450 because otherwise all we do is delete "main" from it as a consequence
3451 of the SvREFCNT_dec, only to add it again with hv_name_set */
3452 SvREFCNT_dec(GvHV(gv));
3453 hv_name_set(PL_defstash, "main", 4, 0);
3454 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3456 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3458 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3459 GvMULTI_on(PL_incgv);
3460 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3461 GvMULTI_on(PL_hintgv);
3462 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3463 SvREFCNT_inc_simple_void(PL_defgv);
3464 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3465 SvREFCNT_inc_simple_void(PL_errgv);
3466 GvMULTI_on(PL_errgv);
3467 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3468 GvMULTI_on(PL_replgv);
3469 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3470 #ifdef PERL_DONT_CREATE_GVSV
3473 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3475 PL_curstash = PL_defstash;
3476 CopSTASH_set(&PL_compiling, PL_defstash);
3477 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3478 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3480 /* We must init $/ before switches are processed. */
3481 sv_setpvs(get_sv("/", GV_ADD), "\n");
3485 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3486 bool *suidscript, PerlIO **rsfpp)
3491 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3494 PL_origfilename = savepvs("-e");
3497 /* if find_script() returns, it returns a malloc()-ed value */
3498 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3500 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3501 const char *s = scriptname + 8;
3507 * Tell apart "normal" usage of fdscript, e.g.
3508 * with bash on FreeBSD:
3509 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3510 * from usage in suidperl.
3511 * Does any "normal" usage leave garbage after the number???
3512 * Is it a mistake to use a similar /dev/fd/ construct for
3517 * Be supersafe and do some sanity-checks.
3518 * Still, can we be sure we got the right thing?
3521 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3524 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3526 scriptname = savepv(s + 1);
3527 Safefree(PL_origfilename);
3528 PL_origfilename = (char *)scriptname;
3533 CopFILE_free(PL_curcop);
3534 CopFILE_set(PL_curcop, PL_origfilename);
3535 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3536 scriptname = (char *)"";
3537 if (fdscript >= 0) {
3538 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3539 # if defined(HAS_FCNTL) && defined(F_SETFD)
3541 /* ensure close-on-exec */
3542 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3545 else if (!*scriptname) {
3546 forbid_setid(0, *suidscript);
3547 *rsfpp = PerlIO_stdin();
3550 #ifdef FAKE_BIT_BUCKET
3551 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3552 * is called) and still have the "-e" work. (Believe it or not,
3553 * a /dev/null is required for the "-e" to work because source
3554 * filter magic is used to implement it. ) This is *not* a general
3555 * replacement for a /dev/null. What we do here is create a temp
3556 * file (an empty file), open up that as the script, and then
3557 * immediately close and unlink it. Close enough for jazz. */
3558 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3559 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3560 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3561 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3562 FAKE_BIT_BUCKET_TEMPLATE
3564 const char * const err = "Failed to create a fake bit bucket";
3565 if (strEQ(scriptname, BIT_BUCKET)) {
3566 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3567 int tmpfd = mkstemp(tmpname);
3569 scriptname = tmpname;
3572 Perl_croak(aTHX_ err);
3575 scriptname = mktemp(tmpname);
3577 Perl_croak(aTHX_ err);
3582 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3583 #ifdef FAKE_BIT_BUCKET
3584 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3585 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3586 && strlen(scriptname) == sizeof(tmpname) - 1) {
3589 scriptname = BIT_BUCKET;
3591 # if defined(HAS_FCNTL) && defined(F_SETFD)
3593 /* ensure close-on-exec */
3594 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3598 /* PSz 16 Sep 03 Keep neat error message */
3600 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3602 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3603 CopFILE(PL_curcop), Strerror(errno));
3609 * I_SYSSTATVFS HAS_FSTATVFS
3611 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3612 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3613 * here so that metaconfig picks them up. */
3616 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3617 /* Don't even need this function. */
3620 S_validate_suid(pTHX_ PerlIO *rsfp)
3622 PERL_ARGS_ASSERT_VALIDATE_SUID;
3624 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3627 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3628 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3630 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3633 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3634 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3635 /* not set-id, must be wrapped */
3638 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3641 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3645 register const char *s2;
3647 PERL_ARGS_ASSERT_FIND_BEGINNING;
3649 /* skip forward in input to the real script? */
3651 while (PL_doextract) {
3652 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3653 Perl_croak(aTHX_ "No Perl script found in input\n");
3655 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3656 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3657 PL_doextract = FALSE;
3658 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3660 while (*s == ' ' || *s == '\t') s++;
3662 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3663 || s2[-1] == '_') s2--;
3664 if (strnEQ(s2-4,"perl",4))
3665 while ((s = moreswitches(s)))
3677 PL_uid = PerlProc_getuid();
3678 PL_euid = PerlProc_geteuid();
3679 PL_gid = PerlProc_getgid();
3680 PL_egid = PerlProc_getegid();
3682 PL_uid |= PL_gid << 16;
3683 PL_euid |= PL_egid << 16;
3685 /* Should not happen: */
3686 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3687 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3690 * Should go by suidscript, not uid!=euid: why disallow
3691 * system("ls") in scripts run from setuid things?
3692 * Or, is this run before we check arguments and set suidscript?
3693 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3694 * (We never have suidscript, can we be sure to have fdscript?)
3695 * Or must then go by UID checks? See comments in forbid_setid also.
3699 /* This is used very early in the lifetime of the program,
3700 * before even the options are parsed, so PL_tainting has
3701 * not been initialized properly. */
3703 Perl_doing_taint(int argc, char *argv[], char *envp[])
3705 #ifndef PERL_IMPLICIT_SYS
3706 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3707 * before we have an interpreter-- and the whole point of this
3708 * function is to be called at such an early stage. If you are on
3709 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3710 * "tainted because running with altered effective ids', you'll
3711 * have to add your own checks somewhere in here. The two most
3712 * known samples of 'implicitness' are Win32 and NetWare, neither
3713 * of which has much of concept of 'uids'. */
3714 int uid = PerlProc_getuid();
3715 int euid = PerlProc_geteuid();
3716 int gid = PerlProc_getgid();
3717 int egid = PerlProc_getegid();
3724 if (uid && (euid != uid || egid != gid))
3726 #endif /* !PERL_IMPLICIT_SYS */
3727 /* This is a really primitive check; environment gets ignored only
3728 * if -T are the first chars together; otherwise one gets
3729 * "Too late" message. */
3730 if ( argc > 1 && argv[1][0] == '-'
3731 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3736 /* Passing the flag as a single char rather than a string is a slight space
3737 optimisation. The only message that isn't /^-.$/ is
3738 "program input from stdin", which is substituted in place of '\0', which
3739 could never be a command line flag. */
3741 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3744 char string[3] = "-x";
3745 const char *message = "program input from stdin";
3752 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3753 if (PL_euid != PL_uid)
3754 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3755 if (PL_egid != PL_gid)
3756 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3757 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3759 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3763 Perl_init_debugger(pTHX)
3766 HV * const ostash = PL_curstash;
3768 PL_curstash = PL_debstash;
3769 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3771 AvREAL_off(PL_dbargs);
3772 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3773 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3774 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3775 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3776 sv_setiv(PL_DBsingle, 0);
3777 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3778 sv_setiv(PL_DBtrace, 0);
3779 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3780 sv_setiv(PL_DBsignal, 0);
3781 PL_curstash = ostash;
3784 #ifndef STRESS_REALLOC
3785 #define REASONABLE(size) (size)
3787 #define REASONABLE(size) (1) /* unreasonable */
3791 Perl_init_stacks(pTHX)
3794 /* start with 128-item stack and 8K cxstack */
3795 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3796 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3797 PL_curstackinfo->si_type = PERLSI_MAIN;
3798 PL_curstack = PL_curstackinfo->si_stack;
3799 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3801 PL_stack_base = AvARRAY(PL_curstack);
3802 PL_stack_sp = PL_stack_base;
3803 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3805 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3808 PL_tmps_max = REASONABLE(128);
3810 Newx(PL_markstack,REASONABLE(32),I32);
3811 PL_markstack_ptr = PL_markstack;
3812 PL_markstack_max = PL_markstack + REASONABLE(32);
3816 Newx(PL_scopestack,REASONABLE(32),I32);
3817 PL_scopestack_ix = 0;
3818 PL_scopestack_max = REASONABLE(32);
3820 Newx(PL_savestack,REASONABLE(128),ANY);
3821 PL_savestack_ix = 0;
3822 PL_savestack_max = REASONABLE(128);
3831 while (PL_curstackinfo->si_next)
3832 PL_curstackinfo = PL_curstackinfo->si_next;
3833 while (PL_curstackinfo) {
3834 PERL_SI *p = PL_curstackinfo->si_prev;
3835 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3836 Safefree(PL_curstackinfo->si_cxstack);
3837 Safefree(PL_curstackinfo);
3838 PL_curstackinfo = p;
3840 Safefree(PL_tmps_stack);
3841 Safefree(PL_markstack);
3842 Safefree(PL_scopestack);
3843 Safefree(PL_savestack);
3848 S_init_predump_symbols(pTHX)
3854 sv_setpvs(get_sv("\"", GV_ADD), " ");
3855 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3857 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3858 GvMULTI_on(PL_stdingv);
3859 io = GvIOp(PL_stdingv);
3860 IoTYPE(io) = IoTYPE_RDONLY;
3861 IoIFP(io) = PerlIO_stdin();
3862 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3864 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3866 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3869 IoTYPE(io) = IoTYPE_WRONLY;
3870 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3872 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3874 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3876 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3877 GvMULTI_on(PL_stderrgv);
3878 io = GvIOp(PL_stderrgv);
3879 IoTYPE(io) = IoTYPE_WRONLY;
3880 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3881 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3883 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3885 PL_statname = newSV(0); /* last filename we did stat on */
3889 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3893 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3895 argc--,argv++; /* skip name of script */
3896 if (PL_doswitches) {
3897 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3901 if (argv[0][1] == '-' && !argv[0][2]) {
3905 if ((s = strchr(argv[0], '='))) {
3906 const char *const start_name = argv[0] + 1;
3907 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3908 TRUE, SVt_PV)), s + 1);
3911 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3914 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3915 GvMULTI_on(PL_argvgv);
3916 (void)gv_AVadd(PL_argvgv);
3917 av_clear(GvAVn(PL_argvgv));
3918 for (; argc > 0; argc--,argv++) {
3919 SV * const sv = newSVpv(argv[0],0);
3920 av_push(GvAVn(PL_argvgv),sv);
3921 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3922 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3925 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3926 (void)sv_utf8_decode(sv);
3932 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3937 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3939 PL_toptarget = newSV_type(SVt_PVFM);
3940 sv_setpvs(PL_toptarget, "");
3941 PL_bodytarget = newSV_type(SVt_PVFM);
3942 sv_setpvs(PL_bodytarget, "");
3943 PL_formtarget = PL_bodytarget;
3947 init_argv_symbols(argc,argv);
3949 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3950 sv_setpv(GvSV(tmpgv),PL_origfilename);
3952 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3954 bool env_is_not_environ;
3955 GvMULTI_on(PL_envgv);
3956 hv = GvHVn(PL_envgv);
3957 hv_magic(hv, NULL, PERL_MAGIC_env);
3959 #ifdef USE_ENVIRON_ARRAY
3960 /* Note that if the supplied env parameter is actually a copy
3961 of the global environ then it may now point to free'd memory
3962 if the environment has been modified since. To avoid this
3963 problem we treat env==NULL as meaning 'use the default'
3967 env_is_not_environ = env != environ;
3968 if (env_is_not_environ
3969 # ifdef USE_ITHREADS
3970 && PL_curinterp == aTHX
3979 for (; *env; env++) {
3982 if (!(s = strchr(old_var,'=')) || s == old_var)
3985 #if defined(MSDOS) && !defined(DJGPP)
3987 (void)strupr(old_var);
3990 sv = newSVpv(s+1, 0);
3991 (void)hv_store(hv, old_var, s - old_var, sv, 0);
3992 if (env_is_not_environ)
3996 #endif /* USE_ENVIRON_ARRAY */
3997 #endif /* !PERL_MICRO */
4000 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4001 SvREADONLY_off(GvSV(tmpgv));
4002 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4003 SvREADONLY_on(GvSV(tmpgv));
4005 #ifdef THREADS_HAVE_PIDS
4006 PL_ppid = (IV)getppid();
4009 /* touch @F array to prevent spurious warnings 20020415 MJD */
4011 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4016 S_init_perllib(pTHX)
4020 const char *perl5lib = NULL;
4029 perl5lib = PerlEnv_getenv("PERL5LIB");
4031 * It isn't possible to delete an environment variable with
4032 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4033 * case we treat PERL5LIB as undefined if it has a zero-length value.
4035 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4036 if (perl5lib && *perl5lib != '\0')
4040 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4042 s = PerlEnv_getenv("PERLLIB");
4044 incpush_use_sep(s, 0, 0);
4047 /* Treat PERL5?LIB as a possible search list logical name -- the
4048 * "natural" VMS idiom for a Unix path string. We allow each
4049 * element to be a set of |-separated directories for compatibility.
4053 if (my_trnlnm("PERL5LIB",buf,0))
4055 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4056 } while (my_trnlnm("PERL5LIB",buf,++idx));
4058 while (my_trnlnm("PERLLIB",buf,idx++))
4059 incpush_use_sep(buf, 0, 0);
4064 #ifndef PERL_IS_MINIPERL
4065 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4066 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4068 /* Use the ~-expanded versions of APPLLIB (undocumented),
4069 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4072 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4073 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4077 /* sitearch is always relative to sitelib on Windows for
4078 * DLL-based path intuition to work correctly */
4079 # if !defined(WIN32)
4080 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4081 INCPUSH_CAN_RELOCATE);
4087 /* this picks up sitearch as well */
4088 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4090 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4092 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4096 #ifdef PERL_VENDORARCH_EXP
4097 /* vendorarch is always relative to vendorlib on Windows for
4098 * DLL-based path intuition to work correctly */
4099 # if !defined(WIN32)
4100 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4101 INCPUSH_CAN_RELOCATE);
4105 #ifdef PERL_VENDORLIB_EXP
4107 /* this picks up vendorarch as well */
4108 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4110 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4112 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4113 INCPUSH_CAN_RELOCATE);
4118 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4122 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4126 s = win32_get_privlib(PERL_FS_VERSION, &len);
4128 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4131 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4133 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4137 #ifdef PERL_OTHERLIBDIRS
4138 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4139 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4140 |INCPUSH_CAN_RELOCATE);
4146 * It isn't possible to delete an environment variable with
4147 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4148 * case we treat PERL5LIB as undefined if it has a zero-length value.
4150 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4151 if (perl5lib && *perl5lib != '\0')
4155 incpush_use_sep(perl5lib, 0,
4156 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4158 /* Treat PERL5?LIB as a possible search list logical name -- the
4159 * "natural" VMS idiom for a Unix path string. We allow each
4160 * element to be a set of |-separated directories for compatibility.
4164 if (my_trnlnm("PERL5LIB",buf,0))
4166 incpush_use_sep(buf, 0,
4167 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4168 } while (my_trnlnm("PERL5LIB",buf,++idx));
4172 /* Use the ~-expanded versions of APPLLIB (undocumented),
4173 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4176 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4177 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4180 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4181 /* Search for version-specific dirs below here */
4182 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4183 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4187 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4188 /* Search for version-specific dirs below here */
4189 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4190 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4193 #ifdef PERL_OTHERLIBDIRS
4194 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4195 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4196 |INCPUSH_CAN_RELOCATE);
4198 #endif /* !PERL_IS_MINIPERL */
4201 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4204 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4205 # define PERLLIB_SEP ';'
4208 # define PERLLIB_SEP '|'
4210 # define PERLLIB_SEP ':'
4213 #ifndef PERLLIB_MANGLE
4214 # define PERLLIB_MANGLE(s,n) (s)
4217 /* Push a directory onto @INC if it exists.
4218 Generate a new SV if we do this, to save needing to copy the SV we push
4221 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4226 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4228 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4229 S_ISDIR(tmpstatbuf.st_mode)) {
4231 dir = newSVsv(stem);
4233 /* Truncate dir back to stem. */
4234 SvCUR_set(dir, SvCUR(stem));
4240 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4243 const U8 using_sub_dirs
4244 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4245 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4246 const U8 add_versioned_sub_dirs
4247 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4248 const U8 add_archonly_sub_dirs
4249 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4250 #ifdef PERL_INC_VERSION_LIST
4251 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4253 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4254 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4255 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4256 AV *const inc = GvAVn(PL_incgv);
4258 PERL_ARGS_ASSERT_INCPUSH;
4261 /* Could remove this vestigial extra block, if we don't mind a lot of
4262 re-indenting diff noise. */
4265 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4266 arranged to unshift #! line -I onto the front of @INC. However,
4267 -I can add version and architecture specific libraries, and they
4268 need to go first. The old code assumed that it was always
4269 pushing. Hence to make it work, need to push the architecture
4270 (etc) libraries onto a temporary array, then "unshift" that onto
4271 the front of @INC. */
4272 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4275 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4276 defined to so something (in os2/os2.c), but the code has been
4277 this way, ignoring any possible changed of length, since
4278 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4280 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4282 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4285 /* Do the if() outside the #ifdef to avoid warnings about an unused
4288 #ifdef PERL_RELOCATABLE_INC
4290 * Relocatable include entries are marked with a leading .../
4293 * 0: Remove that leading ".../"
4294 * 1: Remove trailing executable name (anything after the last '/')
4295 * from the perl path to give a perl prefix
4297 * While the @INC element starts "../" and the prefix ends with a real
4298 * directory (ie not . or ..) chop that real directory off the prefix
4299 * and the leading "../" from the @INC element. ie a logical "../"
4301 * Finally concatenate the prefix and the remainder of the @INC element
4302 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4303 * generates /usr/local/lib/perl5
4305 const char *libpath = SvPVX(libdir);
4306 STRLEN libpath_len = SvCUR(libdir);
4307 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4309 SV * const caret_X = get_sv("\030", 0);
4310 /* Going to use the SV just as a scratch buffer holding a C
4316 /* $^X is *the* source of taint if tainting is on, hence
4317 SvPOK() won't be true. */
4319 assert(SvPOKp(caret_X));
4320 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4322 /* Firstly take off the leading .../
4323 If all else fail we'll do the paths relative to the current
4325 sv_chop(libdir, libpath + 4);
4326 /* Don't use SvPV as we're intentionally bypassing taining,
4327 mortal copies that the mg_get of tainting creates, and
4328 corruption that seems to come via the save stack.
4329 I guess that the save stack isn't correctly set up yet. */
4330 libpath = SvPVX(libdir);
4331 libpath_len = SvCUR(libdir);
4333 /* This would work more efficiently with memrchr, but as it's
4334 only a GNU extension we'd need to probe for it and
4335 implement our own. Not hard, but maybe not worth it? */
4337 prefix = SvPVX(prefix_sv);
4338 lastslash = strrchr(prefix, '/');
4340 /* First time in with the *lastslash = '\0' we just wipe off
4341 the trailing /perl from (say) /usr/foo/bin/perl
4345 while ((*lastslash = '\0'), /* Do that, come what may. */
4346 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4347 && (lastslash = strrchr(prefix, '/')))) {
4348 if (lastslash[1] == '\0'
4349 || (lastslash[1] == '.'
4350 && (lastslash[2] == '/' /* ends "/." */
4351 || (lastslash[2] == '/'
4352 && lastslash[3] == '/' /* or "/.." */
4354 /* Prefix ends "/" or "/." or "/..", any of which
4355 are fishy, so don't do any more logical cleanup.
4359 /* Remove leading "../" from path */
4362 /* Next iteration round the loop removes the last
4363 directory name from prefix by writing a '\0' in
4364 the while clause. */
4366 /* prefix has been terminated with a '\0' to the correct
4367 length. libpath points somewhere into the libdir SV.
4368 We need to join the 2 with '/' and drop the result into
4370 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4371 SvREFCNT_dec(libdir);
4372 /* And this is the new libdir. */
4375 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4376 /* Need to taint reloccated paths if running set ID */
4377 SvTAINTED_on(libdir);
4380 SvREFCNT_dec(prefix_sv);
4385 * BEFORE pushing libdir onto @INC we may first push version- and
4386 * archname-specific sub-directories.
4388 if (using_sub_dirs) {
4390 #ifdef PERL_INC_VERSION_LIST
4391 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4392 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4393 const char * const *incver;
4400 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4402 while (unix[len-1] == '/') len--; /* Cosmetic */
4403 sv_usepvn(libdir,unix,len);
4406 PerlIO_printf(Perl_error_log,
4407 "Failed to unixify @INC element \"%s\"\n",
4411 subdir = newSVsv(libdir);
4413 if (add_versioned_sub_dirs) {
4414 /* .../version/archname if -d .../version/archname */
4415 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4416 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4418 /* .../version if -d .../version */
4419 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4420 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4423 #ifdef PERL_INC_VERSION_LIST
4425 for (incver = incverlist; *incver; incver++) {
4426 /* .../xxx if -d .../xxx */
4427 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4428 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4433 if (add_archonly_sub_dirs) {
4434 /* .../archname if -d .../archname */
4435 sv_catpvs(subdir, "/" ARCHNAME);
4436 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4440 assert (SvREFCNT(subdir) == 1);
4441 SvREFCNT_dec(subdir);
4444 /* finally add this lib directory at the end of @INC */
4446 U32 extra = av_len(av) + 1;
4447 av_unshift(inc, extra + push_basedir);
4449 av_store(inc, extra, libdir);
4451 /* av owns a reference, av_store() expects to be donated a
4452 reference, and av expects to be sane when it's cleared.
4453 If I wanted to be naughty and wrong, I could peek inside the
4454 implementation of av_clear(), realise that it uses
4455 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4456 and so directly steal from it (with a memcpy() to inc, and
4457 then memset() to NULL them out. But people copy code from the
4458 core expecting it to be best practise, so let's use the API.
4459 Although studious readers will note that I'm not checking any
4461 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4465 else if (push_basedir) {
4466 av_push(inc, libdir);
4469 if (!push_basedir) {
4470 assert (SvREFCNT(libdir) == 1);
4471 SvREFCNT_dec(libdir);
4477 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4481 /* This logic has been broken out from S_incpush(). It may be possible to
4484 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4491 /* Break at all separators */
4492 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4494 /* skip any consecutive separators */
4496 /* Uncomment the next line for PATH semantics */
4497 /* But you'll need to write tests */
4498 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4500 incpush(p, (STRLEN)(s - p), flags);
4505 incpush(p, (STRLEN)(end - p), flags);
4510 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4514 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4520 PERL_ARGS_ASSERT_CALL_LIST;
4522 while (av_len(paramList) >= 0) {
4523 cv = MUTABLE_CV(av_shift(paramList));
4525 if (paramList == PL_beginav) {
4526 /* save PL_beginav for compiler */
4527 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4529 else if (paramList == PL_checkav) {
4530 /* save PL_checkav for compiler */
4531 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4533 else if (paramList == PL_unitcheckav) {
4534 /* save PL_unitcheckav for compiler */
4535 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4546 PL_madskills |= 16384;
4551 PL_madskills &= ~16384;
4554 (void)SvPV_const(atsv, len);
4556 PL_curcop = &PL_compiling;
4557 CopLINE_set(PL_curcop, oldline);
4558 if (paramList == PL_beginav)
4559 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4561 Perl_sv_catpvf(aTHX_ atsv,
4562 "%s failed--call queue aborted",
4563 paramList == PL_checkav ? "CHECK"
4564 : paramList == PL_initav ? "INIT"
4565 : paramList == PL_unitcheckav ? "UNITCHECK"
4567 while (PL_scopestack_ix > oldscope)
4570 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4577 /* my_exit() was called */
4578 while (PL_scopestack_ix > oldscope)
4581 PL_curstash = PL_defstash;
4582 PL_curcop = &PL_compiling;
4583 CopLINE_set(PL_curcop, oldline);
4585 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
4586 if (paramList == PL_beginav)
4587 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
4589 Perl_croak(aTHX_ "%s failed--call queue aborted",
4590 paramList == PL_checkav ? "CHECK"
4591 : paramList == PL_initav ? "INIT"
4592 : paramList == PL_unitcheckav ? "UNITCHECK"
4599 PL_curcop = &PL_compiling;
4600 CopLINE_set(PL_curcop, oldline);
4603 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4612 Perl_my_exit(pTHX_ U32 status)
4623 STATUS_EXIT_SET(status);
4630 Perl_my_failure_exit(pTHX)
4634 /* We have been called to fall on our sword. The desired exit code
4635 * should be already set in STATUS_UNIX, but could be shifted over
4636 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4639 * If an error code has not been set, then force the issue.
4641 if (MY_POSIX_EXIT) {
4643 /* According to the die_exit.t tests, if errno is non-zero */
4644 /* It should be used for the error status. */
4646 if (errno == EVMSERR) {
4647 STATUS_NATIVE = vaxc$errno;
4650 /* According to die_exit.t tests, if the child_exit code is */
4651 /* also zero, then we need to exit with a code of 255 */
4652 if ((errno != 0) && (errno < 256))
4653 STATUS_UNIX_EXIT_SET(errno);
4654 else if (STATUS_UNIX < 255) {
4655 STATUS_UNIX_EXIT_SET(255);
4660 /* The exit code could have been set by $? or vmsish which
4661 * means that it may not have fatal set. So convert
4662 * success/warning codes to fatal with out changing
4663 * the POSIX status code. The severity makes VMS native
4664 * status handling work, while UNIX mode programs use the
4665 * the POSIX exit codes.
4667 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4668 STATUS_NATIVE &= STS$M_COND_ID;
4669 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4673 /* Traditionally Perl on VMS always expects a Fatal Error. */
4674 if (vaxc$errno & 1) {
4676 /* So force success status to failure */
4677 if (STATUS_NATIVE & 1)
4682 STATUS_UNIX = EINTR; /* In case something cares */
4687 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4689 /* Encode the severity code */
4690 severity = STATUS_NATIVE & STS$M_SEVERITY;
4691 STATUS_UNIX = (severity ? severity : 1) << 8;
4693 /* Perl expects this to be a fatal error */
4694 if (severity != STS$K_SEVERE)
4703 STATUS_UNIX_SET(errno);
4705 exitstatus = STATUS_UNIX >> 8;
4706 if (exitstatus & 255)
4707 STATUS_UNIX_SET(exitstatus);
4709 STATUS_UNIX_SET(255);
4716 S_my_exit_jump(pTHX)
4721 SvREFCNT_dec(PL_e_script);
4725 POPSTACK_TO(PL_mainstack);
4733 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4736 const char * const p = SvPVX_const(PL_e_script);
4737 const char *nl = strchr(p, '\n');
4739 PERL_UNUSED_ARG(idx);
4740 PERL_UNUSED_ARG(maxlen);
4742 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4744 filter_del(read_e_script);
4747 sv_catpvn(buf_sv, p, nl-p);
4748 sv_chop(PL_e_script, nl);
4754 * c-indentation-style: bsd
4756 * indent-tabs-mode: t
4759 * ex: set ts=8 sts=4 sw=4 noet: