4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 by Larry Wall
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
28 #define PERL_IN_PERL_C
30 #include "patchlevel.h" /* for local_patches */
37 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
42 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
44 # include <sys/wait.h>
52 char control[CMSG_SPACE(sizeof(int))];
69 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
70 char *getenv (char *); /* Usually in <stdlib.h> */
73 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
75 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
76 /* Drop everything. Heck, don't even try to call it */
77 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
79 /* Drop almost everything */
80 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
83 #define CALL_BODY_EVAL(myop) \
84 if (PL_op == (myop)) \
85 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
89 #define CALL_BODY_SUB(myop) \
90 if (PL_op == (myop)) \
91 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
95 #define CALL_LIST_BODY(cv) \
96 PUSHMARK(PL_stack_sp); \
97 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
100 S_init_tls_and_interp(PerlInterpreter *my_perl)
104 PERL_SET_INTERP(my_perl);
105 #if defined(USE_ITHREADS)
108 PERL_SET_THX(my_perl);
111 MUTEX_INIT(&PL_dollarzero_mutex);
112 MUTEX_INIT(&PL_my_ctx_mutex);
115 #if defined(USE_ITHREADS)
118 /* This always happens for non-ithreads */
121 PERL_SET_THX(my_perl);
126 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
129 Perl_sys_init(int* argc, char*** argv)
133 PERL_ARGS_ASSERT_SYS_INIT;
135 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
136 PERL_UNUSED_ARG(argv);
137 PERL_SYS_INIT_BODY(argc, argv);
141 Perl_sys_init3(int* argc, char*** argv, char*** env)
145 PERL_ARGS_ASSERT_SYS_INIT3;
147 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
148 PERL_UNUSED_ARG(argv);
149 PERL_UNUSED_ARG(env);
150 PERL_SYS_INIT3_BODY(argc, argv, env);
157 if (!PL_veto_cleanup) {
158 PERL_SYS_TERM_BODY();
163 #ifdef PERL_IMPLICIT_SYS
165 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
166 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
167 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
168 struct IPerlDir* ipD, struct IPerlSock* ipS,
169 struct IPerlProc* ipP)
171 PerlInterpreter *my_perl;
173 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
175 /* Newx() needs interpreter, so call malloc() instead */
176 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
177 S_init_tls_and_interp(my_perl);
178 Zero(my_perl, 1, PerlInterpreter);
188 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
195 =head1 Embedding Functions
197 =for apidoc perl_alloc
199 Allocates a new Perl interpreter. See L<perlembed>.
207 PerlInterpreter *my_perl;
209 /* Newx() needs interpreter, so call malloc() instead */
210 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
212 S_init_tls_and_interp(my_perl);
213 #ifndef PERL_TRACK_MEMPOOL
214 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
216 Zero(my_perl, 1, PerlInterpreter);
217 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
221 #endif /* PERL_IMPLICIT_SYS */
224 =for apidoc perl_construct
226 Initializes a new Perl interpreter. See L<perlembed>.
232 perl_construct(pTHXx)
236 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
240 PL_perl_destruct_level = 1;
242 PERL_UNUSED_ARG(my_perl);
243 if (PL_perl_destruct_level > 0)
246 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
248 /* set read-only and try to insure than we wont see REFCNT==0
251 SvREADONLY_on(&PL_sv_undef);
252 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
254 sv_setpv(&PL_sv_no,PL_No);
255 /* value lookup in void context - happens to have the side effect
256 of caching the numeric forms. However, as &PL_sv_no doesn't contain
257 a string that is a valid numer, we have to turn the public flags by
263 SvREADONLY_on(&PL_sv_no);
264 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
266 sv_setpv(&PL_sv_yes,PL_Yes);
269 SvREADONLY_on(&PL_sv_yes);
270 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
272 SvREADONLY_on(&PL_sv_placeholder);
273 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
275 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
276 #ifdef PERL_USES_PL_PIDSTATUS
277 PL_pidstatus = newHV();
280 PL_rs = newSVpvs("\n");
290 SET_NUMERIC_STANDARD();
292 #if defined(LOCAL_PATCH_COUNT)
293 PL_localpatches = local_patches; /* For possible -v */
296 #ifdef HAVE_INTERP_INTERN
300 PerlIO_init(aTHX); /* Hook to IO system */
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
306 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
307 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
309 /* First entry is a list of empty elements. It needs to be initialised
310 else all hell breaks loose in S_find_uninit_var(). */
311 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
312 PL_regex_pad = AvARRAY(PL_regex_padav);
314 #ifdef USE_REENTRANT_API
315 Perl_reentrant_init(aTHX);
318 /* Note that strtab is a rather special HV. Assumptions are made
319 about not iterating on it, and not adding tie magic to it.
320 It is properly deallocated in perl_destruct() */
323 HvSHAREKEYS_off(PL_strtab); /* mandatory */
324 hv_ksplit(PL_strtab, 512);
326 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
327 _dyld_lookup_and_bind
328 ("__environ", (unsigned long *) &environ_pointer, NULL);
332 # ifdef USE_ENVIRON_ARRAY
333 PL_origenviron = environ;
337 /* Use sysconf(_SC_CLK_TCK) if available, if not
338 * available or if the sysconf() fails, use the HZ.
339 * BeOS has those, but returns the wrong value.
340 * The HZ if not originally defined has been by now
341 * been defined as CLK_TCK, if available. */
342 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
343 PL_clocktick = sysconf(_SC_CLK_TCK);
344 if (PL_clocktick <= 0)
348 PL_stashcache = newHV();
350 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
351 PL_apiversion = newSVpvs("v" PERL_API_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 assert(PL_scopestack_ix == 1);
545 /* wait for all pseudo-forked children to finish */
546 PERL_WAIT_FOR_CHILDREN;
548 destruct_level = PL_perl_destruct_level;
551 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
553 const int i = atoi(s);
554 if (destruct_level < i)
560 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
566 if (PL_endav && !PL_minus_c)
567 call_list(PL_scopestack_ix, PL_endav);
572 assert(PL_scopestack_ix == 0);
574 /* Need to flush since END blocks can produce output */
577 if (CALL_FPTR(PL_threadhook)(aTHX)) {
578 /* Threads hook has vetoed further cleanup */
579 PL_veto_cleanup = TRUE;
583 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
584 if (destruct_level != 0) {
585 /* Fork here to create a child. Our child's job is to preserve the
586 state of scalars prior to destruction, so that we can instruct it
587 to dump any scalars that we later find have leaked.
588 There's no subtlety in this code - it assumes POSIX, and it doesn't
592 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
593 perror("Debug leaking scalars socketpair failed");
599 perror("Debug leaking scalars fork failed");
603 /* We are the child */
604 const int sock = fd[1];
605 const int debug_fd = PerlIO_fileno(Perl_debug_log);
608 /* Our success message is an integer 0, and a char 0 */
609 static const char success[sizeof(int) + 1] = {0};
613 /* We need to close all other file descriptors otherwise we end up
614 with interesting hangs, where the parent closes its end of a
615 pipe, and sits waiting for (another) child to terminate. Only
616 that child never terminates, because it never gets EOF, because
617 we also have the far end of the pipe open. We even need to
618 close the debugging fd, because sometimes it happens to be one
619 end of a pipe, and a process is waiting on the other end for
620 EOF. Normally it would be closed at some point earlier in
621 destruction, but if we happen to cause the pipe to remain open,
622 EOF never occurs, and we get an infinite hang. Hence all the
623 games to pass in a file descriptor if it's actually needed. */
625 f = sysconf(_SC_OPEN_MAX);
627 where = "sysconf failed";
638 union control_un control;
641 struct cmsghdr *cmptr;
645 msg.msg_control = control.control;
646 msg.msg_controllen = sizeof(control.control);
647 /* We're a connected socket so we don't need a source */
651 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
653 vec[0].iov_base = (void*)⌖
654 vec[0].iov_len = sizeof(target);
656 got = recvmsg(sock, &msg, 0);
661 where = "recv failed";
664 if(got < sizeof(target)) {
665 where = "short recv";
669 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
673 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
674 where = "wrong cmsg_len";
677 if(cmptr->cmsg_level != SOL_SOCKET) {
678 where = "wrong cmsg_level";
681 if(cmptr->cmsg_type != SCM_RIGHTS) {
682 where = "wrong cmsg_type";
686 got_fd = *(int*)CMSG_DATA(cmptr);
687 /* For our last little bit of trickery, put the file descriptor
688 back into Perl_debug_log, as if we never actually closed it
690 if(got_fd != debug_fd) {
691 if (dup2(got_fd, debug_fd) == -1) {
698 PerlIO_flush(Perl_debug_log);
700 got = write(sock, &success, sizeof(success));
703 where = "write failed";
706 if(got < sizeof(success)) {
707 where = "short write";
714 int send_errno = errno;
715 unsigned char length = (unsigned char) strlen(where);
716 struct iovec failure[3] = {
717 {(void*)&send_errno, sizeof(send_errno)},
719 {(void*)where, length}
721 int got = writev(sock, failure, 3);
722 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
723 in the parent if we try to read from the socketpair after the
724 child has exited, even if there was data to read.
725 So sleep a bit to give the parent a fighting chance of
728 _exit((got == -1) ? errno : 0);
732 PL_dumper_fd = fd[0];
737 /* We must account for everything. */
739 /* Destroy the main CV and syntax tree */
740 /* Do this now, because destroying ops can cause new SVs to be generated
741 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
742 PL_curcop to point to a valid op from which the filename structure
744 PL_curcop = &PL_compiling;
746 /* ensure comppad/curpad to refer to main's pad */
747 if (CvPADLIST(PL_main_cv)) {
748 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
750 op_free(PL_main_root);
753 PL_main_start = NULL;
754 SvREFCNT_dec(PL_main_cv);
758 /* Tell PerlIO we are about to tear things apart in case
759 we have layers which are using resources that should
763 PerlIO_destruct(aTHX);
765 if (PL_sv_objcount) {
767 * Try to destruct global references. We do this first so that the
768 * destructors and destructees still exist. Some sv's might remain.
769 * Non-referenced objects are on their own.
773 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
774 PL_defoutgv = NULL; /* may have been freed */
777 /* unhook hooks which will soon be, or use, destroyed data */
778 SvREFCNT_dec(PL_warnhook);
780 SvREFCNT_dec(PL_diehook);
783 /* call exit list functions */
784 while (PL_exitlistlen-- > 0)
785 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
787 Safefree(PL_exitlist);
792 SvREFCNT_dec(PL_registered_mros);
794 /* jettison our possibly duplicated environment */
795 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
796 * so we certainly shouldn't free it here
799 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
800 if (environ != PL_origenviron && !PL_use_safe_putenv
802 /* only main thread can free environ[0] contents */
803 && PL_curinterp == aTHX
809 for (i = 0; environ[i]; i++)
810 safesysfree(environ[i]);
812 /* Must use safesysfree() when working with environ. */
813 safesysfree(environ);
815 environ = PL_origenviron;
818 #endif /* !PERL_MICRO */
820 if (destruct_level == 0) {
822 DEBUG_P(debprofdump());
824 #if defined(PERLIO_LAYERS)
825 /* No more IO - including error messages ! */
826 PerlIO_cleanup(aTHX);
829 CopFILE_free(&PL_compiling);
830 CopSTASH_free(&PL_compiling);
832 /* The exit() function will do everything that needs doing. */
836 /* reset so print() ends up where we expect */
840 /* the syntax tree is shared between clones
841 * so op_free(PL_main_root) only ReREFCNT_dec's
842 * REGEXPs in the parent interpreter
843 * we need to manually ReREFCNT_dec for the clones
845 SvREFCNT_dec(PL_regex_padav);
846 PL_regex_padav = NULL;
850 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
851 PL_stashcache = NULL;
853 /* loosen bonds of global variables */
855 /* XXX can PL_parser still be non-null here? */
856 if(PL_parser && PL_parser->rsfp) {
857 (void)PerlIO_close(PL_parser->rsfp);
858 PL_parser->rsfp = NULL;
862 Safefree(PL_splitstr);
872 PL_doswitches = FALSE;
873 PL_dowarn = G_WARN_OFF;
874 PL_doextract = FALSE;
875 PL_sawampersand = FALSE; /* must save all match strings */
878 Safefree(PL_inplace);
880 SvREFCNT_dec(PL_patchlevel);
881 SvREFCNT_dec(PL_apiversion);
884 SvREFCNT_dec(PL_e_script);
890 /* magical thingies */
892 SvREFCNT_dec(PL_ofsgv); /* *, */
895 SvREFCNT_dec(PL_ors_sv); /* $\ */
898 SvREFCNT_dec(PL_rs); /* $/ */
901 Safefree(PL_osname); /* $^O */
904 SvREFCNT_dec(PL_statname);
908 /* defgv, aka *_ should be taken care of elsewhere */
910 /* clean up after study() */
911 SvREFCNT_dec(PL_lastscream);
912 PL_lastscream = NULL;
913 Safefree(PL_screamfirst);
915 Safefree(PL_screamnext);
919 Safefree(PL_efloatbuf);
923 /* startup and shutdown function lists */
924 SvREFCNT_dec(PL_beginav);
925 SvREFCNT_dec(PL_beginav_save);
926 SvREFCNT_dec(PL_endav);
927 SvREFCNT_dec(PL_checkav);
928 SvREFCNT_dec(PL_checkav_save);
929 SvREFCNT_dec(PL_unitcheckav);
930 SvREFCNT_dec(PL_unitcheckav_save);
931 SvREFCNT_dec(PL_initav);
933 PL_beginav_save = NULL;
936 PL_checkav_save = NULL;
937 PL_unitcheckav = NULL;
938 PL_unitcheckav_save = NULL;
941 /* shortcuts just get cleared */
950 PL_last_in_gv = NULL;
962 SvREFCNT_dec(PL_argvout_stack);
963 PL_argvout_stack = NULL;
965 SvREFCNT_dec(PL_modglobal);
967 SvREFCNT_dec(PL_preambleav);
968 PL_preambleav = NULL;
969 SvREFCNT_dec(PL_subname);
971 #ifdef PERL_USES_PL_PIDSTATUS
972 SvREFCNT_dec(PL_pidstatus);
975 SvREFCNT_dec(PL_toptarget);
977 SvREFCNT_dec(PL_bodytarget);
978 PL_bodytarget = NULL;
979 PL_formtarget = NULL;
981 /* free locale stuff */
982 #ifdef USE_LOCALE_COLLATE
983 Safefree(PL_collation_name);
984 PL_collation_name = NULL;
987 #ifdef USE_LOCALE_NUMERIC
988 Safefree(PL_numeric_name);
989 PL_numeric_name = NULL;
990 SvREFCNT_dec(PL_numeric_radix_sv);
991 PL_numeric_radix_sv = NULL;
994 /* clear utf8 character classes */
995 SvREFCNT_dec(PL_utf8_alnum);
996 SvREFCNT_dec(PL_utf8_ascii);
997 SvREFCNT_dec(PL_utf8_alpha);
998 SvREFCNT_dec(PL_utf8_space);
999 SvREFCNT_dec(PL_utf8_cntrl);
1000 SvREFCNT_dec(PL_utf8_graph);
1001 SvREFCNT_dec(PL_utf8_digit);
1002 SvREFCNT_dec(PL_utf8_upper);
1003 SvREFCNT_dec(PL_utf8_lower);
1004 SvREFCNT_dec(PL_utf8_print);
1005 SvREFCNT_dec(PL_utf8_punct);
1006 SvREFCNT_dec(PL_utf8_xdigit);
1007 SvREFCNT_dec(PL_utf8_mark);
1008 SvREFCNT_dec(PL_utf8_toupper);
1009 SvREFCNT_dec(PL_utf8_totitle);
1010 SvREFCNT_dec(PL_utf8_tolower);
1011 SvREFCNT_dec(PL_utf8_tofold);
1012 SvREFCNT_dec(PL_utf8_idstart);
1013 SvREFCNT_dec(PL_utf8_idcont);
1014 PL_utf8_alnum = NULL;
1015 PL_utf8_ascii = NULL;
1016 PL_utf8_alpha = NULL;
1017 PL_utf8_space = NULL;
1018 PL_utf8_cntrl = NULL;
1019 PL_utf8_graph = NULL;
1020 PL_utf8_digit = NULL;
1021 PL_utf8_upper = NULL;
1022 PL_utf8_lower = NULL;
1023 PL_utf8_print = NULL;
1024 PL_utf8_punct = NULL;
1025 PL_utf8_xdigit = NULL;
1026 PL_utf8_mark = NULL;
1027 PL_utf8_toupper = NULL;
1028 PL_utf8_totitle = NULL;
1029 PL_utf8_tolower = NULL;
1030 PL_utf8_tofold = NULL;
1031 PL_utf8_idstart = NULL;
1032 PL_utf8_idcont = NULL;
1034 if (!specialWARN(PL_compiling.cop_warnings))
1035 PerlMemShared_free(PL_compiling.cop_warnings);
1036 PL_compiling.cop_warnings = NULL;
1037 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1038 PL_compiling.cop_hints_hash = NULL;
1039 CopFILE_free(&PL_compiling);
1040 CopSTASH_free(&PL_compiling);
1042 /* Prepare to destruct main symbol table. */
1047 SvREFCNT_dec(PL_curstname);
1048 PL_curstname = NULL;
1050 /* clear queued errors */
1051 SvREFCNT_dec(PL_errors);
1054 SvREFCNT_dec(PL_isarev);
1057 if (destruct_level >= 2) {
1058 if (PL_scopestack_ix != 0)
1059 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1060 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1061 (long)PL_scopestack_ix);
1062 if (PL_savestack_ix != 0)
1063 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1064 "Unbalanced saves: %ld more saves than restores\n",
1065 (long)PL_savestack_ix);
1066 if (PL_tmps_floor != -1)
1067 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1068 (long)PL_tmps_floor + 1);
1069 if (cxstack_ix != -1)
1070 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1071 (long)cxstack_ix + 1);
1074 /* Now absolutely destruct everything, somehow or other, loops or no. */
1076 /* the 2 is for PL_fdpid and PL_strtab */
1077 while (sv_clean_all() > 2)
1080 AvREAL_off(PL_fdpid); /* no surviving entries */
1081 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1084 #ifdef HAVE_INTERP_INTERN
1088 /* Destruct the global string table. */
1090 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1091 * so that sv_free() won't fail on them.
1092 * Now that the global string table is using a single hunk of memory
1093 * for both HE and HEK, we either need to explicitly unshare it the
1094 * correct way, or actually free things here.
1097 const I32 max = HvMAX(PL_strtab);
1098 HE * const * const array = HvARRAY(PL_strtab);
1099 HE *hent = array[0];
1102 if (hent && ckWARN_d(WARN_INTERNAL)) {
1103 HE * const next = HeNEXT(hent);
1104 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1105 "Unbalanced string table refcount: (%ld) for \"%s\"",
1106 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1113 hent = array[riter];
1118 HvARRAY(PL_strtab) = 0;
1119 HvTOTALKEYS(PL_strtab) = 0;
1121 SvREFCNT_dec(PL_strtab);
1124 /* free the pointer tables used for cloning */
1125 ptr_table_free(PL_ptr_table);
1126 PL_ptr_table = (PTR_TBL_t*)NULL;
1129 /* free special SVs */
1131 SvREFCNT(&PL_sv_yes) = 0;
1132 sv_clear(&PL_sv_yes);
1133 SvANY(&PL_sv_yes) = NULL;
1134 SvFLAGS(&PL_sv_yes) = 0;
1136 SvREFCNT(&PL_sv_no) = 0;
1137 sv_clear(&PL_sv_no);
1138 SvANY(&PL_sv_no) = NULL;
1139 SvFLAGS(&PL_sv_no) = 0;
1143 for (i=0; i<=2; i++) {
1144 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1145 sv_clear(PERL_DEBUG_PAD(i));
1146 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1147 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1151 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1152 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1154 #ifdef DEBUG_LEAKING_SCALARS
1155 if (PL_sv_count != 0) {
1160 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1161 svend = &sva[SvREFCNT(sva)];
1162 for (sv = sva + 1; sv < svend; ++sv) {
1163 if (SvTYPE(sv) != SVTYPEMASK) {
1164 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1166 " refcnt=%"UVuf pTHX__FORMAT "\n"
1167 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1169 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1171 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1173 sv->sv_debug_inpad ? "for" : "by",
1174 sv->sv_debug_optype ?
1175 PL_op_name[sv->sv_debug_optype]: "(none)",
1176 PTR2UV(sv->sv_debug_parent),
1179 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1180 Perl_dump_sv_child(aTHX_ sv);
1186 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1190 /* Wait for up to 4 seconds for child to terminate.
1191 This seems to be the least effort way of timing out on reaping
1193 struct timeval waitfor = {4, 0};
1194 int sock = PL_dumper_fd;
1198 FD_SET(sock, &rset);
1199 select(sock + 1, &rset, NULL, NULL, &waitfor);
1200 waitpid(child, &status, WNOHANG);
1205 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1211 #ifdef PERL_DEBUG_READONLY_OPS
1217 #if defined(PERLIO_LAYERS)
1218 /* No more IO - including error messages ! */
1219 PerlIO_cleanup(aTHX);
1222 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1223 as currently layers use it rather than NULL as a marker
1224 for no arg - and will try and SvREFCNT_dec it.
1226 SvREFCNT(&PL_sv_undef) = 0;
1227 SvREADONLY_off(&PL_sv_undef);
1229 Safefree(PL_origfilename);
1230 PL_origfilename = NULL;
1231 Safefree(PL_reg_start_tmp);
1232 PL_reg_start_tmp = (char**)NULL;
1233 PL_reg_start_tmpl = 0;
1234 Safefree(PL_reg_curpm);
1235 Safefree(PL_reg_poscache);
1236 free_tied_hv_pool();
1237 Safefree(PL_op_mask);
1238 Safefree(PL_psig_name);
1239 PL_psig_name = (SV**)NULL;
1240 PL_psig_ptr = (SV**)NULL;
1241 Safefree(PL_psig_pend);
1242 PL_psig_pend = (int*)NULL;
1244 /* We need to NULL PL_psig_pend first, so that
1245 signal handlers know not to use it */
1246 int *psig_save = PL_psig_pend;
1247 PL_psig_pend = (int*)NULL;
1248 Safefree(psig_save);
1252 PL_tainting = FALSE;
1253 PL_taint_warn = FALSE;
1254 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1257 DEBUG_P(debprofdump());
1259 #ifdef USE_REENTRANT_API
1260 Perl_reentrant_free(aTHX);
1265 while (PL_regmatch_slab) {
1266 regmatch_slab *s = PL_regmatch_slab;
1267 PL_regmatch_slab = PL_regmatch_slab->next;
1271 /* As the absolutely last thing, free the non-arena SV for mess() */
1274 /* we know that type == SVt_PVMG */
1276 /* it could have accumulated taint magic */
1279 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1280 moremagic = mg->mg_moremagic;
1281 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1283 Safefree(mg->mg_ptr);
1287 /* we know that type >= SVt_PV */
1288 SvPV_free(PL_mess_sv);
1289 Safefree(SvANY(PL_mess_sv));
1290 Safefree(PL_mess_sv);
1297 =for apidoc perl_free
1299 Releases a Perl interpreter. See L<perlembed>.
1309 PERL_ARGS_ASSERT_PERL_FREE;
1311 if (PL_veto_cleanup)
1314 #ifdef PERL_TRACK_MEMPOOL
1317 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1318 * value as we're probably hunting memory leaks then
1320 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1321 if (!s || atoi(s) == 0) {
1322 const U32 old_debug = PL_debug;
1323 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1324 thread at thread exit. */
1326 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1327 "free this thread's memory\n");
1328 PL_debug &= ~ DEBUG_m_FLAG;
1330 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1331 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1332 PL_debug = old_debug;
1337 #if defined(WIN32) || defined(NETWARE)
1338 # if defined(PERL_IMPLICIT_SYS)
1341 void *host = nw_internal_host;
1343 void *host = w32_internal_host;
1345 PerlMem_free(aTHXx);
1347 nw_delete_internal_host(host);
1349 win32_delete_internal_host(host);
1353 PerlMem_free(aTHXx);
1356 PerlMem_free(aTHXx);
1360 #if defined(USE_ITHREADS)
1361 /* provide destructors to clean up the thread key when libperl is unloaded */
1362 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1364 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1365 #pragma fini "perl_fini"
1366 #elif defined(__sun) && !defined(__GNUC__)
1367 #pragma fini (perl_fini)
1371 #if defined(__GNUC__)
1372 __attribute__((destructor))
1377 if (PL_curinterp && !PL_veto_cleanup)
1382 #endif /* THREADS */
1385 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1388 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1389 PL_exitlist[PL_exitlistlen].fn = fn;
1390 PL_exitlist[PL_exitlistlen].ptr = ptr;
1394 #ifdef HAS_PROCSELFEXE
1395 /* This is a function so that we don't hold on to MAXPATHLEN
1396 bytes of stack longer than necessary
1399 S_procself_val(pTHX_ SV *sv, const char *arg0)
1401 char buf[MAXPATHLEN];
1402 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1404 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1405 includes a spurious NUL which will cause $^X to fail in system
1406 or backticks (this will prevent extensions from being built and
1407 many tests from working). readlink is not meant to add a NUL.
1408 Normal readlink works fine.
1410 if (len > 0 && buf[len-1] == '\0') {
1414 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1415 returning the text "unknown" from the readlink rather than the path
1416 to the executable (or returning an error from the readlink). Any valid
1417 path has a '/' in it somewhere, so use that to validate the result.
1418 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1420 if (len > 0 && memchr(buf, '/', len)) {
1421 sv_setpvn(sv,buf,len);
1427 #endif /* HAS_PROCSELFEXE */
1430 S_set_caret_X(pTHX) {
1432 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1434 #ifdef HAS_PROCSELFEXE
1435 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1438 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1440 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1447 =for apidoc perl_parse
1449 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1455 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1462 PERL_ARGS_ASSERT_PERL_PARSE;
1463 #ifndef MULTIPLICITY
1464 PERL_UNUSED_ARG(my_perl);
1467 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1468 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1469 * This MUST be done before any hash stores or fetches take place.
1470 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1471 * yourself, it is your responsibility to provide a good random seed!
1472 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1473 if (!PL_rehash_seed_set)
1474 PL_rehash_seed = get_hash_seed();
1476 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1478 if (s && (atoi(s) == 1))
1479 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1481 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1486 if (PL_origalen != 0) {
1487 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1490 /* Set PL_origalen be the sum of the contiguous argv[]
1491 * elements plus the size of the env in case that it is
1492 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1493 * as the maximum modifiable length of $0. In the worst case
1494 * the area we are able to modify is limited to the size of
1495 * the original argv[0]. (See below for 'contiguous', though.)
1497 const char *s = NULL;
1500 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1501 /* Do the mask check only if the args seem like aligned. */
1503 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1505 /* See if all the arguments are contiguous in memory. Note
1506 * that 'contiguous' is a loose term because some platforms
1507 * align the argv[] and the envp[]. If the arguments look
1508 * like non-aligned, assume that they are 'strictly' or
1509 * 'traditionally' contiguous. If the arguments look like
1510 * aligned, we just check that they are within aligned
1511 * PTRSIZE bytes. As long as no system has something bizarre
1512 * like the argv[] interleaved with some other data, we are
1513 * fine. (Did I just evoke Murphy's Law?) --jhi */
1514 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1516 for (i = 1; i < PL_origargc; i++) {
1517 if ((PL_origargv[i] == s + 1
1519 || PL_origargv[i] == s + 2
1524 (PL_origargv[i] > s &&
1526 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1537 #ifndef PERL_USE_SAFE_PUTENV
1538 /* Can we grab env area too to be used as the area for $0? */
1539 if (s && PL_origenviron && !PL_use_safe_putenv) {
1540 if ((PL_origenviron[0] == s + 1)
1543 (PL_origenviron[0] > s &&
1544 PL_origenviron[0] <=
1545 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1548 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1549 s = PL_origenviron[0];
1552 my_setenv("NoNe SuCh", NULL);
1553 /* Force copy of environment. */
1554 for (i = 1; PL_origenviron[i]; i++) {
1555 if (PL_origenviron[i] == s + 1
1558 (PL_origenviron[i] > s &&
1559 PL_origenviron[i] <=
1560 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1563 s = PL_origenviron[i];
1571 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1573 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1578 /* Come here if running an undumped a.out. */
1580 PL_origfilename = savepv(argv[0]);
1581 PL_do_undump = FALSE;
1582 cxstack_ix = -1; /* start label stack again */
1584 assert (!PL_tainted);
1586 S_set_caret_X(aTHX);
1588 init_postdump_symbols(argc,argv,env);
1593 op_free(PL_main_root);
1594 PL_main_root = NULL;
1596 PL_main_start = NULL;
1597 SvREFCNT_dec(PL_main_cv);
1601 oldscope = PL_scopestack_ix;
1602 PL_dowarn = G_WARN_OFF;
1607 parse_body(env,xsinit);
1609 call_list(oldscope, PL_unitcheckav);
1611 call_list(oldscope, PL_checkav);
1618 /* my_exit() was called */
1619 while (PL_scopestack_ix > oldscope)
1622 PL_curstash = PL_defstash;
1624 call_list(oldscope, PL_unitcheckav);
1626 call_list(oldscope, PL_checkav);
1630 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1638 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1639 miniperl, and we need to see those flags reflected in the values here. */
1641 /* What this returns is subject to change. Use the public interface in Config.
1644 S_Internals_V(pTHX_ CV *cv)
1647 #ifdef LOCAL_PATCH_COUNT
1648 const int local_patch_count = LOCAL_PATCH_COUNT;
1650 const int local_patch_count = 0;
1652 const int entries = 3 + local_patch_count;
1654 static char non_bincompat_options[] =
1661 # ifdef PERL_DISABLE_PMC
1664 # ifdef PERL_DONT_CREATE_GVSV
1665 " PERL_DONT_CREATE_GVSV"
1667 # ifdef PERL_IS_MINIPERL
1670 # ifdef PERL_MALLOC_WRAP
1673 # ifdef PERL_MEM_LOG
1676 # ifdef PERL_MEM_LOG_NOIMPL
1677 " PERL_MEM_LOG_NOIMPL"
1679 # ifdef PERL_USE_DEVEL
1682 # ifdef PERL_USE_SAFE_PUTENV
1683 " PERL_USE_SAFE_PUTENV"
1685 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1686 " USE_ATTRIBUTES_FOR_PERLIO"
1688 # ifdef USE_FAST_STDIO
1691 # ifdef USE_PERL_ATOF
1694 # ifdef USE_SITECUSTOMIZE
1695 " USE_SITECUSTOMIZE"
1698 PERL_UNUSED_ARG(cv);
1699 PERL_UNUSED_ARG(items);
1701 EXTEND(SP, entries);
1703 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1704 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1705 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1709 PUSHs(Perl_newSVpvn_flags(aTHX_
1710 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1713 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1717 PUSHs(&PL_sv_undef);
1720 for (i = 1; i <= local_patch_count; i++) {
1721 /* This will be an undef, if PL_localpatches[i] is NULL. */
1722 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1728 #define INCPUSH_UNSHIFT 0x01
1729 #define INCPUSH_ADD_OLD_VERS 0x02
1730 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1731 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1732 #define INCPUSH_NOT_BASEDIR 0x10
1733 #define INCPUSH_CAN_RELOCATE 0x20
1734 #define INCPUSH_ADD_SUB_DIRS \
1735 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1738 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1742 int argc = PL_origargc;
1743 char **argv = PL_origargv;
1744 const char *scriptname = NULL;
1745 VOL bool dosearch = FALSE;
1747 const char *cddir = NULL;
1748 #ifdef USE_SITECUSTOMIZE
1749 bool minus_f = FALSE;
1751 SV *linestr_sv = newSV_type(SVt_PVIV);
1752 bool add_read_e_script = FALSE;
1754 SvGROW(linestr_sv, 80);
1755 sv_setpvs(linestr_sv,"");
1761 for (argc--,argv++; argc > 0; argc--,argv++) {
1762 if (argv[0][0] != '-' || !argv[0][1])
1768 #ifndef PERL_STRICT_CR
1792 if ((s = moreswitches(s)))
1797 CHECK_MALLOC_TOO_LATE_FOR('t');
1798 if( !PL_tainting ) {
1799 PL_taint_warn = TRUE;
1805 CHECK_MALLOC_TOO_LATE_FOR('T');
1807 PL_taint_warn = FALSE;
1815 forbid_setid('e', FALSE);
1817 PL_e_script = newSVpvs("");
1818 add_read_e_script = TRUE;
1821 sv_catpv(PL_e_script, s);
1823 sv_catpv(PL_e_script, argv[1]);
1827 Perl_croak(aTHX_ "No code specified for -%c", c);
1828 sv_catpvs(PL_e_script, "\n");
1832 #ifdef USE_SITECUSTOMIZE
1838 case 'I': /* -I handled both here and in moreswitches() */
1839 forbid_setid('I', FALSE);
1840 if (!*++s && (s=argv[1]) != NULL) {
1844 STRLEN len = strlen(s);
1845 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1848 Perl_croak(aTHX_ "No directory specified for -I");
1851 forbid_setid('S', FALSE);
1860 opts_prog = newSVpvs("use Config; Config::_V()");
1864 opts_prog = Perl_newSVpvf(aTHX_
1865 "use Config; Config::config_vars(qw%c%s%c)",
1869 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1870 /* don't look for script or read stdin */
1871 scriptname = BIT_BUCKET;
1875 PL_doextract = TRUE;
1883 if (!*++s || isSPACE(*s)) {
1887 /* catch use of gnu style long options */
1888 if (strEQ(s, "version")) {
1892 if (strEQ(s, "help")) {
1899 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1910 #ifndef SECURE_INTERNAL_GETENV
1913 (s = PerlEnv_getenv("PERL5OPT")))
1917 if (*s == '-' && *(s+1) == 'T') {
1918 CHECK_MALLOC_TOO_LATE_FOR('T');
1920 PL_taint_warn = FALSE;
1923 char *popt_copy = NULL;
1936 if (!strchr("CDIMUdmtwW", *s))
1937 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1941 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1942 s = popt_copy + (s - d);
1950 if( !PL_tainting ) {
1951 PL_taint_warn = TRUE;
1962 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1964 /* SITELIB_EXP is a function call on Win32.
1965 The games with local $! are to avoid setting errno if there is no
1966 sitecustomize script. */
1967 const char *const sitelib = SITELIB_EXP;
1968 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1970 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1975 scriptname = argv[0];
1978 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1980 else if (scriptname == NULL) {
1982 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1988 /* Set $^X early so that it can be used for relocatable paths in @INC */
1989 assert (!PL_tainted);
1991 S_set_caret_X(aTHX);
1996 bool suidscript = FALSE;
1998 open_script(scriptname, dosearch, &suidscript, &rsfp);
2000 validate_suid(validarg, scriptname, fdscript, suidscript,
2004 # if defined(SIGCHLD) || defined(SIGCLD)
2007 # define SIGCHLD SIGCLD
2009 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2010 if (sigstate == (Sighandler_t) SIG_IGN) {
2011 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2012 "Can't ignore signal CHLD, forcing to default");
2013 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2021 /* This will croak if suidscript is true, as -x cannot be used with
2023 forbid_setid('x', suidscript);
2024 /* Hence you can't get here if suidscript is true */
2026 find_beginning(linestr_sv, rsfp);
2027 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2028 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2032 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2033 CvUNIQUE_on(PL_compcv);
2035 CvPADLIST(PL_compcv) = pad_new(0);
2037 PL_isarev = newHV();
2040 boot_core_UNIVERSAL();
2042 newXS("Internals::V", S_Internals_V, __FILE__);
2045 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2047 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2053 # ifdef HAS_SOCKS5_INIT
2054 socks5_init(argv[0]);
2060 init_predump_symbols();
2061 /* init_postdump_symbols not currently designed to be called */
2062 /* more than once (ENV isn't cleared first, for example) */
2063 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2065 init_postdump_symbols(argc,argv,env);
2067 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2068 * or explicitly in some platforms.
2069 * locale.c:Perl_init_i18nl10n() if the environment
2070 * look like the user wants to use UTF-8. */
2071 #if defined(__SYMBIAN32__)
2072 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2074 # ifndef PERL_IS_MINIPERL
2076 /* Requires init_predump_symbols(). */
2077 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2082 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2083 * and the default open disciplines. */
2084 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2085 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2087 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2088 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2089 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2091 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2092 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2093 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2095 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2096 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2097 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2099 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2100 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2103 sv_setpvs(sv, ":utf8\0:utf8");
2105 sv_setpvs(sv, ":utf8\0");
2108 sv_setpvs(sv, "\0:utf8");
2117 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2118 if (strEQ(s, "unsafe"))
2119 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2120 else if (strEQ(s, "safe"))
2121 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2123 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2130 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2134 PL_xmlfp = PerlIO_stdout();
2136 PL_xmlfp = PerlIO_open(s, "w");
2138 Perl_croak(aTHX_ "Can't open %s", s);
2140 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2146 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2147 PL_madskills = atoi(s);
2148 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2153 lex_start(linestr_sv, rsfp, TRUE);
2154 PL_subname = newSVpvs("main");
2156 if (add_read_e_script)
2157 filter_add(read_e_script, NULL);
2159 /* now parse the script */
2161 SETERRNO(0,SS_NORMAL);
2162 if (yyparse() || PL_parser->error_count) {
2164 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2166 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2170 CopLINE_set(PL_curcop, 0);
2171 PL_curstash = PL_defstash;
2173 SvREFCNT_dec(PL_e_script);
2181 SAVECOPFILE(PL_curcop);
2182 SAVECOPLINE(PL_curcop);
2183 gv_check(PL_defstash);
2192 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2193 dump_mstats("after compilation:");
2198 PL_restartjmpenv = NULL;
2204 =for apidoc perl_run
2206 Tells a Perl interpreter to run. See L<perlembed>.
2219 PERL_ARGS_ASSERT_PERL_RUN;
2220 #ifndef MULTIPLICITY
2221 PERL_UNUSED_ARG(my_perl);
2224 oldscope = PL_scopestack_ix;
2232 cxstack_ix = -1; /* start context stack again */
2234 case 0: /* normal completion */
2238 case 2: /* my_exit() */
2239 while (PL_scopestack_ix > oldscope)
2242 PL_curstash = PL_defstash;
2243 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2244 PL_endav && !PL_minus_c)
2245 call_list(oldscope, PL_endav);
2247 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2248 dump_mstats("after execution: ");
2254 POPSTACK_TO(PL_mainstack);
2257 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2268 S_run_body(pTHX_ I32 oldscope)
2271 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2272 PL_sawampersand ? "Enabling" : "Omitting"));
2274 if (!PL_restartop) {
2278 exit(0); /* less likely to core dump than my_exit(0) */
2282 if (DEBUG_x_TEST || DEBUG_B_TEST)
2283 dump_all_perl(!DEBUG_B_TEST);
2285 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2289 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2292 if (PERLDB_SINGLE && PL_DBsingle)
2293 sv_setiv(PL_DBsingle, 1);
2295 call_list(oldscope, PL_initav);
2296 #ifdef PERL_DEBUG_READONLY_OPS
2297 Perl_pending_Slabs_to_ro(aTHX);
2304 PL_restartjmpenv = NULL;
2305 PL_op = PL_restartop;
2309 else if (PL_main_start) {
2310 CvDEPTH(PL_main_cv) = 1;
2311 PL_op = PL_main_start;
2319 =head1 SV Manipulation Functions
2321 =for apidoc p||get_sv
2323 Returns the SV of the specified Perl scalar. C<flags> are passed to
2324 C<gv_fetchpv>. If C<GV_ADD> is set and the
2325 Perl variable does not exist then it will be created. If C<flags> is zero
2326 and the variable does not exist then NULL is returned.
2332 Perl_get_sv(pTHX_ const char *name, I32 flags)
2336 PERL_ARGS_ASSERT_GET_SV;
2338 gv = gv_fetchpv(name, flags, SVt_PV);
2345 =head1 Array Manipulation Functions
2347 =for apidoc p||get_av
2349 Returns the AV of the specified Perl array. C<flags> are passed to
2350 C<gv_fetchpv>. If C<GV_ADD> is set and the
2351 Perl variable does not exist then it will be created. If C<flags> is zero
2352 and the variable does not exist then NULL is returned.
2358 Perl_get_av(pTHX_ const char *name, I32 flags)
2360 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2362 PERL_ARGS_ASSERT_GET_AV;
2372 =head1 Hash Manipulation Functions
2374 =for apidoc p||get_hv
2376 Returns the HV of the specified Perl hash. C<flags> are passed to
2377 C<gv_fetchpv>. If C<GV_ADD> is set and the
2378 Perl variable does not exist then it will be created. If C<flags> is zero
2379 and the variable does not exist then NULL is returned.
2385 Perl_get_hv(pTHX_ const char *name, I32 flags)
2387 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2389 PERL_ARGS_ASSERT_GET_HV;
2399 =head1 CV Manipulation Functions
2401 =for apidoc p||get_cvn_flags
2403 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2404 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2405 exist then it will be declared (which has the same effect as saying
2406 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2407 then NULL is returned.
2409 =for apidoc p||get_cv
2411 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2417 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2419 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2420 /* XXX this is probably not what they think they're getting.
2421 * It has the same effect as "sub name;", i.e. just a forward
2424 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2426 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2427 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2428 return newSUB(start_subparse(FALSE, 0),
2429 newSVOP(OP_CONST, 0, sv),
2437 /* Nothing in core calls this now, but we can't replace it with a macro and
2438 move it to mathoms.c as a macro would evaluate name twice. */
2440 Perl_get_cv(pTHX_ const char *name, I32 flags)
2442 PERL_ARGS_ASSERT_GET_CV;
2444 return get_cvn_flags(name, strlen(name), flags);
2447 /* Be sure to refetch the stack pointer after calling these routines. */
2451 =head1 Callback Functions
2453 =for apidoc p||call_argv
2455 Performs a callback to the specified Perl sub. See L<perlcall>.
2461 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2463 /* See G_* flags in cop.h */
2464 /* null terminated arg list */
2469 PERL_ARGS_ASSERT_CALL_ARGV;
2474 mXPUSHs(newSVpv(*argv,0));
2479 return call_pv(sub_name, flags);
2483 =for apidoc p||call_pv
2485 Performs a callback to the specified Perl sub. See L<perlcall>.
2491 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2492 /* name of the subroutine */
2493 /* See G_* flags in cop.h */
2495 PERL_ARGS_ASSERT_CALL_PV;
2497 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2501 =for apidoc p||call_method
2503 Performs a callback to the specified Perl method. The blessed object must
2504 be on the stack. See L<perlcall>.
2510 Perl_call_method(pTHX_ const char *methname, I32 flags)
2511 /* name of the subroutine */
2512 /* See G_* flags in cop.h */
2515 PERL_ARGS_ASSERT_CALL_METHOD;
2517 len = strlen(methname);
2519 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2520 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2523 /* May be called with any of a CV, a GV, or an SV containing the name. */
2525 =for apidoc p||call_sv
2527 Performs a callback to the Perl sub whose name is in the SV. See
2534 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2535 /* See G_* flags in cop.h */
2538 LOGOP myop; /* fake syntax tree node */
2543 bool oldcatch = CATCH_GET;
2545 OP* const oldop = PL_op;
2548 PERL_ARGS_ASSERT_CALL_SV;
2550 if (flags & G_DISCARD) {
2554 if (!(flags & G_WANT)) {
2555 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2560 Zero(&myop, 1, LOGOP);
2561 myop.op_next = NULL;
2562 if (!(flags & G_NOARGS))
2563 myop.op_flags |= OPf_STACKED;
2564 myop.op_flags |= OP_GIMME_REVERSE(flags);
2568 EXTEND(PL_stack_sp, 1);
2569 *++PL_stack_sp = sv;
2571 oldscope = PL_scopestack_ix;
2573 if (PERLDB_SUB && PL_curstash != PL_debstash
2574 /* Handle first BEGIN of -d. */
2575 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2576 /* Try harder, since this may have been a sighandler, thus
2577 * curstash may be meaningless. */
2578 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2579 && !(flags & G_NODEBUG))
2580 PL_op->op_private |= OPpENTERSUB_DB;
2582 if (flags & G_METHOD) {
2583 Zero(&method_op, 1, UNOP);
2584 method_op.op_next = PL_op;
2585 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2586 method_op.op_type = OP_METHOD;
2587 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2588 myop.op_type = OP_ENTERSUB;
2589 PL_op = (OP*)&method_op;
2592 if (!(flags & G_EVAL)) {
2594 CALL_BODY_SUB((OP*)&myop);
2595 retval = PL_stack_sp - (PL_stack_base + oldmark);
2596 CATCH_SET(oldcatch);
2599 myop.op_other = (OP*)&myop;
2601 create_eval_scope(flags|G_FAKINGEVAL);
2609 CALL_BODY_SUB((OP*)&myop);
2610 retval = PL_stack_sp - (PL_stack_base + oldmark);
2611 if (!(flags & G_KEEPERR)) {
2619 /* my_exit() was called */
2620 PL_curstash = PL_defstash;
2627 PL_restartjmpenv = NULL;
2628 PL_op = PL_restartop;
2632 PL_stack_sp = PL_stack_base + oldmark;
2633 if ((flags & G_WANT) == G_ARRAY)
2637 *++PL_stack_sp = &PL_sv_undef;
2642 if (PL_scopestack_ix > oldscope)
2643 delete_eval_scope();
2647 if (flags & G_DISCARD) {
2648 PL_stack_sp = PL_stack_base + oldmark;
2657 /* Eval a string. The G_EVAL flag is always assumed. */
2660 =for apidoc p||eval_sv
2662 Tells Perl to C<eval> the string in the SV.
2668 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2670 /* See G_* flags in cop.h */
2674 UNOP myop; /* fake syntax tree node */
2675 VOL I32 oldmark = SP - PL_stack_base;
2678 OP* const oldop = PL_op;
2681 PERL_ARGS_ASSERT_EVAL_SV;
2683 if (flags & G_DISCARD) {
2690 Zero(PL_op, 1, UNOP);
2691 EXTEND(PL_stack_sp, 1);
2692 *++PL_stack_sp = sv;
2694 if (!(flags & G_NOARGS))
2695 myop.op_flags = OPf_STACKED;
2696 myop.op_next = NULL;
2697 myop.op_type = OP_ENTEREVAL;
2698 myop.op_flags |= OP_GIMME_REVERSE(flags);
2699 if (flags & G_KEEPERR)
2700 myop.op_flags |= OPf_SPECIAL;
2702 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2703 * before a PUSHEVAL, which corrupts the stack after a croak */
2704 TAINT_PROPER("eval_sv()");
2710 CALL_BODY_EVAL((OP*)&myop);
2711 retval = PL_stack_sp - (PL_stack_base + oldmark);
2712 if (!(flags & G_KEEPERR)) {
2720 /* my_exit() was called */
2721 PL_curstash = PL_defstash;
2728 PL_restartjmpenv = NULL;
2729 PL_op = PL_restartop;
2733 PL_stack_sp = PL_stack_base + oldmark;
2734 if ((flags & G_WANT) == G_ARRAY)
2738 *++PL_stack_sp = &PL_sv_undef;
2744 if (flags & G_DISCARD) {
2745 PL_stack_sp = PL_stack_base + oldmark;
2755 =for apidoc p||eval_pv
2757 Tells Perl to C<eval> the given string and return an SV* result.
2763 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2767 SV* sv = newSVpv(p, 0);
2769 PERL_ARGS_ASSERT_EVAL_PV;
2771 eval_sv(sv, G_SCALAR);
2778 if (croak_on_error && SvTRUE(ERRSV)) {
2779 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2785 /* Require a module. */
2788 =head1 Embedding Functions
2790 =for apidoc p||require_pv
2792 Tells Perl to C<require> the file named by the string argument. It is
2793 analogous to the Perl code C<eval "require '$file'">. It's even
2794 implemented that way; consider using load_module instead.
2799 Perl_require_pv(pTHX_ const char *pv)
2805 PERL_ARGS_ASSERT_REQUIRE_PV;
2807 PUSHSTACKi(PERLSI_REQUIRE);
2809 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2810 eval_sv(sv_2mortal(sv), G_DISCARD);
2816 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2818 /* This message really ought to be max 23 lines.
2819 * Removed -h because the user already knows that option. Others? */
2821 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2822 minimum of 509 character string literals. */
2823 static const char * const usage_msg[] = {
2824 " -0[octal] specify record separator (\\0, if no argument)\n"
2825 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2826 " -C[number/list] enables the listed Unicode features\n"
2827 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2828 " -d[:debugger] run program under debugger\n"
2829 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2830 " -e program one line of program (several -e's allowed, omit programfile)\n"
2831 " -E program like -e, but enables all optional features\n"
2832 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2833 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2834 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2835 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2836 " -l[octal] enable line ending processing, specifies line terminator\n"
2837 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2838 " -n assume \"while (<>) { ... }\" loop around program\n"
2839 " -p assume loop like -n but print line also, like sed\n"
2840 " -s enable rudimentary parsing for switches after programfile\n"
2841 " -S look for programfile using PATH environment variable\n",
2842 " -t enable tainting warnings\n"
2843 " -T enable tainting checks\n"
2844 " -u dump core after parsing program\n"
2845 " -U allow unsafe operations\n"
2846 " -v print version, patchlevel and license\n"
2847 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2848 " -w enable many useful warnings\n"
2849 " -W enable all warnings\n"
2850 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2851 " -X disable all warnings\n"
2853 "Run 'perldoc perl' for more help with Perl.\n\n",
2856 const char * const *p = usage_msg;
2857 PerlIO *out = PerlIO_stdout();
2859 PERL_ARGS_ASSERT_USAGE;
2862 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2865 PerlIO_puts(out, *p++);
2868 /* convert a string of -D options (or digits) into an int.
2869 * sets *s to point to the char after the options */
2873 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2875 static const char * const usage_msgd[] = {
2876 " Debugging flag values: (see also -d)\n"
2877 " p Tokenizing and parsing (with v, displays parse stack)\n"
2878 " s Stack snapshots (with v, displays all stacks)\n"
2879 " l Context (loop) stack processing\n"
2880 " t Trace execution\n"
2881 " o Method and overloading resolution\n",
2882 " c String/numeric conversions\n"
2883 " P Print profiling info, source file input state\n"
2884 " m Memory and SV allocation\n"
2885 " f Format processing\n"
2886 " r Regular expression parsing and execution\n"
2887 " x Syntax tree dump\n",
2888 " u Tainting checks\n"
2889 " H Hash dump -- usurps values()\n"
2890 " X Scratchpad allocation\n"
2893 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2894 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2895 " v Verbose: use in conjunction with other flags\n"
2896 " C Copy On Write\n"
2897 " A Consistency checks on internal structures\n"
2898 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2899 " M trace smart match resolution\n"
2900 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2905 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2908 /* if adding extra options, remember to update DEBUG_MASK */
2909 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2911 for (; isALNUM(**s); (*s)++) {
2912 const char * const d = strchr(debopts,**s);
2914 i |= 1 << (d - debopts);
2915 else if (ckWARN_d(WARN_DEBUGGING))
2916 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2917 "invalid option -D%c, use -D'' to see choices\n", **s);
2920 else if (isDIGIT(**s)) {
2922 for (; isALNUM(**s); (*s)++) ;
2924 else if (givehelp) {
2925 const char *const *p = usage_msgd;
2926 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2929 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2930 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2931 "-Dp not implemented on this platform\n");
2937 /* This routine handles any switches that can be given during run */
2940 Perl_moreswitches(pTHX_ const char *s)
2944 const char option = *s; /* used to remember option in -m/-M code */
2946 PERL_ARGS_ASSERT_MORESWITCHES;
2954 SvREFCNT_dec(PL_rs);
2955 if (s[1] == 'x' && s[2]) {
2956 const char *e = s+=2;
2962 flags = PERL_SCAN_SILENT_ILLDIGIT;
2963 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2964 if (s + numlen < e) {
2965 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2969 PL_rs = newSVpvs("");
2970 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2971 tmps = (U8*)SvPVX(PL_rs);
2972 uvchr_to_utf8(tmps, rschar);
2973 SvCUR_set(PL_rs, UNISKIP(rschar));
2978 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2979 if (rschar & ~((U8)~0))
2980 PL_rs = &PL_sv_undef;
2981 else if (!rschar && numlen >= 2)
2982 PL_rs = newSVpvs("");
2984 char ch = (char)rschar;
2985 PL_rs = newSVpvn(&ch, 1);
2988 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2993 PL_unicode = parse_unicode_opts( (const char **)&s );
2994 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3000 while (*s && !isSPACE(*s)) ++s;
3001 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3012 forbid_setid('d', FALSE);
3015 /* -dt indicates to the debugger that threads will be used */
3016 if (*s == 't' && !isALNUM(s[1])) {
3018 my_setenv("PERL5DB_THREADED", "1");
3021 /* The following permits -d:Mod to accepts arguments following an =
3022 in the fashion that -MSome::Mod does. */
3023 if (*s == ':' || *s == '=') {
3024 const char *start = ++s;
3025 const char *const end = s + strlen(s);
3026 SV * const sv = newSVpvs("use Devel::");
3028 /* We now allow -d:Module=Foo,Bar */
3029 while(isALNUM(*s) || *s==':') ++s;
3031 sv_catpvn(sv, start, end - start);
3033 sv_catpvn(sv, start, s-start);
3034 /* Don't use NUL as q// delimiter here, this string goes in the
3036 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3039 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3043 PL_perldb = PERLDB_ALL;
3050 forbid_setid('D', FALSE);
3052 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3053 #else /* !DEBUGGING */
3054 if (ckWARN_d(WARN_DEBUGGING))
3055 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3056 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3057 for (s++; isALNUM(*s); s++) ;
3062 usage(PL_origargv[0]);
3065 Safefree(PL_inplace);
3066 #if defined(__CYGWIN__) /* do backup extension automagically */
3067 if (*(s+1) == '\0') {
3068 PL_inplace = savepvs(".bak");
3071 #endif /* __CYGWIN__ */
3073 const char * const start = ++s;
3074 while (*s && !isSPACE(*s))
3077 PL_inplace = savepvn(start, s - start);
3081 if (*s == '-') /* Additional switches on #! line. */
3085 case 'I': /* -I handled both here and in parse_body() */
3086 forbid_setid('I', FALSE);
3088 while (*s && isSPACE(*s))
3093 /* ignore trailing spaces (possibly followed by other switches) */
3095 for (e = p; *e && !isSPACE(*e); e++) ;
3099 } while (*p && *p != '-');
3101 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3107 Perl_croak(aTHX_ "No directory specified for -I");
3113 SvREFCNT_dec(PL_ors_sv);
3119 PL_ors_sv = newSVpvs("\n");
3120 numlen = 3 + (*s == '0');
3121 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3125 if (RsPARA(PL_rs)) {
3126 PL_ors_sv = newSVpvs("\n\n");
3129 PL_ors_sv = newSVsv(PL_rs);
3134 forbid_setid('M', FALSE); /* XXX ? */
3137 forbid_setid('m', FALSE); /* XXX ? */
3142 const char *use = "use ";
3144 /* -M-foo == 'no foo' */
3145 /* Leading space on " no " is deliberate, to make both
3146 possibilities the same length. */
3147 if (*s == '-') { use = " no "; ++s; }
3148 sv = newSVpvn(use,4);
3150 /* We allow -M'Module qw(Foo Bar)' */
3151 while(isALNUM(*s) || *s==':') {
3160 Perl_croak(aTHX_ "Module name required with -%c option",
3163 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3164 "contains single ':'",
3165 (int)(s - start), start, option);
3166 end = s + strlen(s);
3168 sv_catpvn(sv, start, end - start);
3169 if (option == 'm') {
3171 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3172 sv_catpvs( sv, " ()");
3175 sv_catpvn(sv, start, s-start);
3176 /* Use NUL as q''-delimiter. */
3177 sv_catpvs(sv, " split(/,/,q\0");
3179 sv_catpvn(sv, s, end - s);
3180 sv_catpvs(sv, "\0)");
3183 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3186 Perl_croak(aTHX_ "Missing argument to -%c", option);
3197 forbid_setid('s', FALSE);
3198 PL_doswitches = TRUE;
3212 PL_do_undump = TRUE;
3220 if (!sv_derived_from(PL_patchlevel, "version"))
3221 upg_version(PL_patchlevel, TRUE);
3224 SV* level= vstringify(PL_patchlevel);
3225 #ifdef PERL_PATCHNUM
3226 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3227 SV *num = newSVpvs(PERL_PATCHNUM "*");
3229 SV *num = newSVpvs(PERL_PATCHNUM);
3232 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3233 SvREFCNT_dec(level);
3236 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3240 PerlIO_printf(PerlIO_stdout(),
3241 "\nThis is perl " STRINGIFY(PERL_REVISION)
3242 ", version " STRINGIFY(PERL_VERSION)
3243 ", subversion " STRINGIFY(PERL_SUBVERSION)
3244 " (%"SVf") built for " ARCHNAME, level
3246 SvREFCNT_dec(level);
3249 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3250 PerlIO_printf(PerlIO_stdout(),
3251 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3252 SVfARG(vstringify(PL_patchlevel))));
3253 PerlIO_printf(PerlIO_stdout(),
3254 Perl_form(aTHX_ " built under %s at %s %s\n",
3255 OSNAME, __DATE__, __TIME__));
3256 PerlIO_printf(PerlIO_stdout(),
3257 Perl_form(aTHX_ " OS Specific Release: %s\n",
3260 #if defined(LOCAL_PATCH_COUNT)
3261 if (LOCAL_PATCH_COUNT > 0)
3262 PerlIO_printf(PerlIO_stdout(),
3263 "\n(with %d registered patch%s, "
3264 "see perl -V for more detail)",
3266 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "\n\nCopyright 1987-2010, Larry Wall\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3278 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3283 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "atariST series port, ++jrb bammi@cadence.com\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3298 PerlIO_printf(PerlIO_stdout(),
3299 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "EPOC port by Olaf Flebbe, 1999-2002\n");
3318 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3319 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3322 #ifdef __SYMBIAN32__
3323 PerlIO_printf(PerlIO_stdout(),
3324 "Symbian port by Nokia, 2004-2005\n");
3326 #ifdef BINARY_BUILD_NOTICE
3327 BINARY_BUILD_NOTICE;
3329 PerlIO_printf(PerlIO_stdout(),
3331 Perl may be copied only under the terms of either the Artistic License or the\n\
3332 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3333 Complete documentation for Perl, including FAQ lists, should be found on\n\
3334 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3335 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3338 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3339 PL_dowarn |= G_WARN_ON;
3344 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3345 if (!specialWARN(PL_compiling.cop_warnings))
3346 PerlMemShared_free(PL_compiling.cop_warnings);
3347 PL_compiling.cop_warnings = pWARN_ALL ;
3351 PL_dowarn = G_WARN_ALL_OFF;
3352 if (!specialWARN(PL_compiling.cop_warnings))
3353 PerlMemShared_free(PL_compiling.cop_warnings);
3354 PL_compiling.cop_warnings = pWARN_NONE ;
3361 if (s[0] == '-') /* Additional switches on #! line. */
3366 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3372 #ifdef ALTERNATE_SHEBANG
3373 case 'S': /* OS/2 needs -S on "extproc" line. */
3377 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3382 /* compliments of Tom Christiansen */
3384 /* unexec() can be found in the Gnu emacs distribution */
3385 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3388 Perl_my_unexec(pTHX)
3390 PERL_UNUSED_CONTEXT;
3392 SV * prog = newSVpv(BIN_EXP, 0);
3393 SV * file = newSVpv(PL_origfilename, 0);
3397 sv_catpvs(prog, "/perl");
3398 sv_catpvs(file, ".perldump");
3400 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3401 /* unexec prints msg to stderr in case of failure */
3402 PerlProc_exit(status);
3405 # include <lib$routines.h>
3406 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3407 # elif defined(WIN32) || defined(__CYGWIN__)
3408 Perl_croak(aTHX_ "dump is not supported");
3410 ABORT(); /* for use with undump */
3415 /* initialize curinterp */
3421 # define PERLVAR(var,type)
3422 # define PERLVARA(var,n,type)
3423 # if defined(PERL_IMPLICIT_CONTEXT)
3424 # define PERLVARI(var,type,init) aTHX->var = init;
3425 # define PERLVARIC(var,type,init) aTHX->var = init;
3427 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3428 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3430 # include "intrpvar.h"
3436 # define PERLVAR(var,type)
3437 # define PERLVARA(var,n,type)
3438 # define PERLVARI(var,type,init) PL_##var = init;
3439 # define PERLVARIC(var,type,init) PL_##var = init;
3440 # include "intrpvar.h"
3447 /* As these are inside a structure, PERLVARI isn't capable of initialising
3449 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3450 PL_reg_poscache = PL_reg_starttry = NULL;
3454 S_init_main_stash(pTHX)
3459 PL_curstash = PL_defstash = newHV();
3460 /* We know that the string "main" will be in the global shared string
3461 table, so it's a small saving to use it rather than allocate another
3463 PL_curstname = newSVpvs_share("main");
3464 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3465 /* If we hadn't caused another reference to "main" to be in the shared
3466 string table above, then it would be worth reordering these two,
3467 because otherwise all we do is delete "main" from it as a consequence
3468 of the SvREFCNT_dec, only to add it again with hv_name_set */
3469 SvREFCNT_dec(GvHV(gv));
3470 hv_name_set(PL_defstash, "main", 4, 0);
3471 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3473 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3475 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3476 GvMULTI_on(PL_incgv);
3477 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3478 GvMULTI_on(PL_hintgv);
3479 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3480 SvREFCNT_inc_simple_void(PL_defgv);
3481 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3482 SvREFCNT_inc_simple_void(PL_errgv);
3483 GvMULTI_on(PL_errgv);
3484 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3485 GvMULTI_on(PL_replgv);
3486 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3487 #ifdef PERL_DONT_CREATE_GVSV
3490 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3492 PL_curstash = PL_defstash;
3493 CopSTASH_set(&PL_compiling, PL_defstash);
3494 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3495 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3497 /* We must init $/ before switches are processed. */
3498 sv_setpvs(get_sv("/", GV_ADD), "\n");
3502 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3503 bool *suidscript, PerlIO **rsfpp)
3508 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3511 PL_origfilename = savepvs("-e");
3514 /* if find_script() returns, it returns a malloc()-ed value */
3515 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3517 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3518 const char *s = scriptname + 8;
3524 * Tell apart "normal" usage of fdscript, e.g.
3525 * with bash on FreeBSD:
3526 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3527 * from usage in suidperl.
3528 * Does any "normal" usage leave garbage after the number???
3529 * Is it a mistake to use a similar /dev/fd/ construct for
3534 * Be supersafe and do some sanity-checks.
3535 * Still, can we be sure we got the right thing?
3538 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3541 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3543 scriptname = savepv(s + 1);
3544 Safefree(PL_origfilename);
3545 PL_origfilename = (char *)scriptname;
3550 CopFILE_free(PL_curcop);
3551 CopFILE_set(PL_curcop, PL_origfilename);
3552 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3553 scriptname = (char *)"";
3554 if (fdscript >= 0) {
3555 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3556 # if defined(HAS_FCNTL) && defined(F_SETFD)
3558 /* ensure close-on-exec */
3559 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3562 else if (!*scriptname) {
3563 forbid_setid(0, *suidscript);
3564 *rsfpp = PerlIO_stdin();
3567 #ifdef FAKE_BIT_BUCKET
3568 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3569 * is called) and still have the "-e" work. (Believe it or not,
3570 * a /dev/null is required for the "-e" to work because source
3571 * filter magic is used to implement it. ) This is *not* a general
3572 * replacement for a /dev/null. What we do here is create a temp
3573 * file (an empty file), open up that as the script, and then
3574 * immediately close and unlink it. Close enough for jazz. */
3575 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3576 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3577 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3578 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3579 FAKE_BIT_BUCKET_TEMPLATE
3581 const char * const err = "Failed to create a fake bit bucket";
3582 if (strEQ(scriptname, BIT_BUCKET)) {
3583 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3584 int tmpfd = mkstemp(tmpname);
3586 scriptname = tmpname;
3589 Perl_croak(aTHX_ err);
3592 scriptname = mktemp(tmpname);
3594 Perl_croak(aTHX_ err);
3599 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3600 #ifdef FAKE_BIT_BUCKET
3601 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3602 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3603 && strlen(scriptname) == sizeof(tmpname) - 1) {
3606 scriptname = BIT_BUCKET;
3608 # if defined(HAS_FCNTL) && defined(F_SETFD)
3610 /* ensure close-on-exec */
3611 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3615 /* PSz 16 Sep 03 Keep neat error message */
3617 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3619 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3620 CopFILE(PL_curcop), Strerror(errno));
3626 * I_SYSSTATVFS HAS_FSTATVFS
3628 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3629 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3630 * here so that metaconfig picks them up. */
3633 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3634 /* Don't even need this function. */
3637 S_validate_suid(pTHX_ PerlIO *rsfp)
3639 PERL_ARGS_ASSERT_VALIDATE_SUID;
3641 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3644 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3645 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3647 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3650 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3651 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3652 /* not set-id, must be wrapped */
3655 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3658 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3662 register const char *s2;
3664 PERL_ARGS_ASSERT_FIND_BEGINNING;
3666 /* skip forward in input to the real script? */
3668 while (PL_doextract) {
3669 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3670 Perl_croak(aTHX_ "No Perl script found in input\n");
3672 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3673 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3674 PL_doextract = FALSE;
3675 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3677 while (*s == ' ' || *s == '\t') s++;
3679 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3680 || s2[-1] == '_') s2--;
3681 if (strnEQ(s2-4,"perl",4))
3682 while ((s = moreswitches(s)))
3694 PL_uid = PerlProc_getuid();
3695 PL_euid = PerlProc_geteuid();
3696 PL_gid = PerlProc_getgid();
3697 PL_egid = PerlProc_getegid();
3699 PL_uid |= PL_gid << 16;
3700 PL_euid |= PL_egid << 16;
3702 /* Should not happen: */
3703 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3704 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3707 * Should go by suidscript, not uid!=euid: why disallow
3708 * system("ls") in scripts run from setuid things?
3709 * Or, is this run before we check arguments and set suidscript?
3710 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3711 * (We never have suidscript, can we be sure to have fdscript?)
3712 * Or must then go by UID checks? See comments in forbid_setid also.
3716 /* This is used very early in the lifetime of the program,
3717 * before even the options are parsed, so PL_tainting has
3718 * not been initialized properly. */
3720 Perl_doing_taint(int argc, char *argv[], char *envp[])
3722 #ifndef PERL_IMPLICIT_SYS
3723 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3724 * before we have an interpreter-- and the whole point of this
3725 * function is to be called at such an early stage. If you are on
3726 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3727 * "tainted because running with altered effective ids', you'll
3728 * have to add your own checks somewhere in here. The two most
3729 * known samples of 'implicitness' are Win32 and NetWare, neither
3730 * of which has much of concept of 'uids'. */
3731 int uid = PerlProc_getuid();
3732 int euid = PerlProc_geteuid();
3733 int gid = PerlProc_getgid();
3734 int egid = PerlProc_getegid();
3741 if (uid && (euid != uid || egid != gid))
3743 #endif /* !PERL_IMPLICIT_SYS */
3744 /* This is a really primitive check; environment gets ignored only
3745 * if -T are the first chars together; otherwise one gets
3746 * "Too late" message. */
3747 if ( argc > 1 && argv[1][0] == '-'
3748 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3753 /* Passing the flag as a single char rather than a string is a slight space
3754 optimisation. The only message that isn't /^-.$/ is
3755 "program input from stdin", which is substituted in place of '\0', which
3756 could never be a command line flag. */
3758 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3761 char string[3] = "-x";
3762 const char *message = "program input from stdin";
3769 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3770 if (PL_euid != PL_uid)
3771 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3772 if (PL_egid != PL_gid)
3773 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3774 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3776 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3780 Perl_init_dbargs(pTHX)
3782 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3787 /* Someone has already created it.
3788 It might have entries, and if we just turn off AvREAL(), they will
3789 "leak" until global destruction. */
3792 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3796 Perl_init_debugger(pTHX)
3799 HV * const ostash = PL_curstash;
3801 PL_curstash = PL_debstash;
3803 Perl_init_dbargs(aTHX);
3804 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3805 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3806 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3807 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3808 if (!SvIOK(PL_DBsingle))
3809 sv_setiv(PL_DBsingle, 0);
3810 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3811 if (!SvIOK(PL_DBtrace))
3812 sv_setiv(PL_DBtrace, 0);
3813 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3814 if (!SvIOK(PL_DBsignal))
3815 sv_setiv(PL_DBsignal, 0);
3816 PL_curstash = ostash;
3819 #ifndef STRESS_REALLOC
3820 #define REASONABLE(size) (size)
3822 #define REASONABLE(size) (1) /* unreasonable */
3826 Perl_init_stacks(pTHX)
3829 /* start with 128-item stack and 8K cxstack */
3830 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3831 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3832 PL_curstackinfo->si_type = PERLSI_MAIN;
3833 PL_curstack = PL_curstackinfo->si_stack;
3834 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3836 PL_stack_base = AvARRAY(PL_curstack);
3837 PL_stack_sp = PL_stack_base;
3838 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3840 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3843 PL_tmps_max = REASONABLE(128);
3845 Newx(PL_markstack,REASONABLE(32),I32);
3846 PL_markstack_ptr = PL_markstack;
3847 PL_markstack_max = PL_markstack + REASONABLE(32);
3851 Newx(PL_scopestack,REASONABLE(32),I32);
3853 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3855 PL_scopestack_ix = 0;
3856 PL_scopestack_max = REASONABLE(32);
3858 Newx(PL_savestack,REASONABLE(128),ANY);
3859 PL_savestack_ix = 0;
3860 PL_savestack_max = REASONABLE(128);
3869 while (PL_curstackinfo->si_next)
3870 PL_curstackinfo = PL_curstackinfo->si_next;
3871 while (PL_curstackinfo) {
3872 PERL_SI *p = PL_curstackinfo->si_prev;
3873 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3874 Safefree(PL_curstackinfo->si_cxstack);
3875 Safefree(PL_curstackinfo);
3876 PL_curstackinfo = p;
3878 Safefree(PL_tmps_stack);
3879 Safefree(PL_markstack);
3880 Safefree(PL_scopestack);
3882 Safefree(PL_scopestack_name);
3884 Safefree(PL_savestack);
3889 S_init_predump_symbols(pTHX)
3896 sv_setpvs(get_sv("\"", GV_ADD), " ");
3897 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3900 /* Historically, PVIOs were blessed into IO::Handle, unless
3901 FileHandle was loaded, in which case they were blessed into
3902 that. Action at a distance.
3903 However, if we simply bless into IO::Handle, we break code
3904 that assumes that PVIOs will have (among others) a seek
3905 method. IO::File inherits from IO::Handle and IO::Seekable,
3906 and provides the needed methods. But if we simply bless into
3907 it, then we break code that assumed that by loading
3908 IO::Handle, *it* would work.
3909 So a compromise is to set up the correct @IO::File::ISA,
3910 so that code that does C<use IO::Handle>; will still work.
3913 isa = get_av("IO::File::ISA", GV_ADD | GV_ADDMULTI);
3914 av_push(isa, newSVpvs("IO::Handle"));
3915 av_push(isa, newSVpvs("IO::Seekable"));
3916 av_push(isa, newSVpvs("Exporter"));
3917 (void) gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVGV);
3918 (void) gv_fetchpvs("IO::Seekable::", GV_ADD, SVt_PVGV);
3919 (void) gv_fetchpvs("Exporter::", GV_ADD, SVt_PVGV);
3922 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3923 GvMULTI_on(PL_stdingv);
3924 io = GvIOp(PL_stdingv);
3925 IoTYPE(io) = IoTYPE_RDONLY;
3926 IoIFP(io) = PerlIO_stdin();
3927 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3929 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3931 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3934 IoTYPE(io) = IoTYPE_WRONLY;
3935 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3937 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3939 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3941 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3942 GvMULTI_on(PL_stderrgv);
3943 io = GvIOp(PL_stderrgv);
3944 IoTYPE(io) = IoTYPE_WRONLY;
3945 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3946 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3948 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3950 PL_statname = newSV(0); /* last filename we did stat on */
3954 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3958 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3960 argc--,argv++; /* skip name of script */
3961 if (PL_doswitches) {
3962 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3966 if (argv[0][1] == '-' && !argv[0][2]) {
3970 if ((s = strchr(argv[0], '='))) {
3971 const char *const start_name = argv[0] + 1;
3972 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3973 TRUE, SVt_PV)), s + 1);
3976 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3979 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3980 GvMULTI_on(PL_argvgv);
3981 (void)gv_AVadd(PL_argvgv);
3982 av_clear(GvAVn(PL_argvgv));
3983 for (; argc > 0; argc--,argv++) {
3984 SV * const sv = newSVpv(argv[0],0);
3985 av_push(GvAVn(PL_argvgv),sv);
3986 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3987 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3990 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3991 (void)sv_utf8_decode(sv);
3997 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4002 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4004 PL_toptarget = newSV_type(SVt_PVFM);
4005 sv_setpvs(PL_toptarget, "");
4006 PL_bodytarget = newSV_type(SVt_PVFM);
4007 sv_setpvs(PL_bodytarget, "");
4008 PL_formtarget = PL_bodytarget;
4012 init_argv_symbols(argc,argv);
4014 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4015 sv_setpv(GvSV(tmpgv),PL_origfilename);
4017 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4019 bool env_is_not_environ;
4020 GvMULTI_on(PL_envgv);
4021 hv = GvHVn(PL_envgv);
4022 hv_magic(hv, NULL, PERL_MAGIC_env);
4024 #ifdef USE_ENVIRON_ARRAY
4025 /* Note that if the supplied env parameter is actually a copy
4026 of the global environ then it may now point to free'd memory
4027 if the environment has been modified since. To avoid this
4028 problem we treat env==NULL as meaning 'use the default'
4032 env_is_not_environ = env != environ;
4033 if (env_is_not_environ
4034 # ifdef USE_ITHREADS
4035 && PL_curinterp == aTHX
4044 for (; *env; env++) {
4047 if (!(s = strchr(old_var,'=')) || s == old_var)
4050 #if defined(MSDOS) && !defined(DJGPP)
4052 (void)strupr(old_var);
4055 sv = newSVpv(s+1, 0);
4056 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4057 if (env_is_not_environ)
4061 #endif /* USE_ENVIRON_ARRAY */
4062 #endif /* !PERL_MICRO */
4065 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4066 SvREADONLY_off(GvSV(tmpgv));
4067 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4068 SvREADONLY_on(GvSV(tmpgv));
4070 #ifdef THREADS_HAVE_PIDS
4071 PL_ppid = (IV)getppid();
4074 /* touch @F array to prevent spurious warnings 20020415 MJD */
4076 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4081 S_init_perllib(pTHX)
4085 const char *perl5lib = NULL;
4088 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4094 perl5lib = PerlEnv_getenv("PERL5LIB");
4096 * It isn't possible to delete an environment variable with
4097 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4098 * case we treat PERL5LIB as undefined if it has a zero-length value.
4100 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4101 if (perl5lib && *perl5lib != '\0')
4105 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4107 s = PerlEnv_getenv("PERLLIB");
4109 incpush_use_sep(s, 0, 0);
4112 /* Treat PERL5?LIB as a possible search list logical name -- the
4113 * "natural" VMS idiom for a Unix path string. We allow each
4114 * element to be a set of |-separated directories for compatibility.
4118 if (my_trnlnm("PERL5LIB",buf,0))
4120 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4121 } while (my_trnlnm("PERL5LIB",buf,++idx));
4123 while (my_trnlnm("PERLLIB",buf,idx++))
4124 incpush_use_sep(buf, 0, 0);
4129 #ifndef PERL_IS_MINIPERL
4130 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4131 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4133 /* Use the ~-expanded versions of APPLLIB (undocumented),
4134 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4137 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4138 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4142 /* sitearch is always relative to sitelib on Windows for
4143 * DLL-based path intuition to work correctly */
4144 # if !defined(WIN32)
4145 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4146 INCPUSH_CAN_RELOCATE);
4152 /* this picks up sitearch as well */
4153 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4155 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4157 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4161 #ifdef PERL_VENDORARCH_EXP
4162 /* vendorarch is always relative to vendorlib on Windows for
4163 * DLL-based path intuition to work correctly */
4164 # if !defined(WIN32)
4165 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4166 INCPUSH_CAN_RELOCATE);
4170 #ifdef PERL_VENDORLIB_EXP
4172 /* this picks up vendorarch as well */
4173 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4175 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4177 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4178 INCPUSH_CAN_RELOCATE);
4183 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4187 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4191 s = win32_get_privlib(PERL_FS_VERSION, &len);
4193 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4196 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4198 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4202 #ifdef PERL_OTHERLIBDIRS
4203 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4204 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4205 |INCPUSH_CAN_RELOCATE);
4211 * It isn't possible to delete an environment variable with
4212 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4213 * case we treat PERL5LIB as undefined if it has a zero-length value.
4215 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4216 if (perl5lib && *perl5lib != '\0')
4220 incpush_use_sep(perl5lib, 0,
4221 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4223 /* Treat PERL5?LIB as a possible search list logical name -- the
4224 * "natural" VMS idiom for a Unix path string. We allow each
4225 * element to be a set of |-separated directories for compatibility.
4229 if (my_trnlnm("PERL5LIB",buf,0))
4231 incpush_use_sep(buf, 0,
4232 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4233 } while (my_trnlnm("PERL5LIB",buf,++idx));
4237 /* Use the ~-expanded versions of APPLLIB (undocumented),
4238 SITELIB and VENDORLIB for older versions
4241 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4242 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4245 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4246 /* Search for version-specific dirs below here */
4247 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4248 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4252 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4253 /* Search for version-specific dirs below here */
4254 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4255 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4258 #ifdef PERL_OTHERLIBDIRS
4259 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4260 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4261 |INCPUSH_CAN_RELOCATE);
4263 #endif /* !PERL_IS_MINIPERL */
4266 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4269 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4270 # define PERLLIB_SEP ';'
4273 # define PERLLIB_SEP '|'
4275 # define PERLLIB_SEP ':'
4278 #ifndef PERLLIB_MANGLE
4279 # define PERLLIB_MANGLE(s,n) (s)
4282 /* Push a directory onto @INC if it exists.
4283 Generate a new SV if we do this, to save needing to copy the SV we push
4286 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4291 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4293 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4294 S_ISDIR(tmpstatbuf.st_mode)) {
4296 dir = newSVsv(stem);
4298 /* Truncate dir back to stem. */
4299 SvCUR_set(dir, SvCUR(stem));
4305 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4308 const U8 using_sub_dirs
4309 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4310 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4311 const U8 add_versioned_sub_dirs
4312 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4313 const U8 add_archonly_sub_dirs
4314 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4315 #ifdef PERL_INC_VERSION_LIST
4316 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4318 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4319 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4320 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4321 AV *const inc = GvAVn(PL_incgv);
4323 PERL_ARGS_ASSERT_INCPUSH;
4326 /* Could remove this vestigial extra block, if we don't mind a lot of
4327 re-indenting diff noise. */
4330 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4331 arranged to unshift #! line -I onto the front of @INC. However,
4332 -I can add version and architecture specific libraries, and they
4333 need to go first. The old code assumed that it was always
4334 pushing. Hence to make it work, need to push the architecture
4335 (etc) libraries onto a temporary array, then "unshift" that onto
4336 the front of @INC. */
4337 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4340 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4341 defined to so something (in os2/os2.c), but the code has been
4342 this way, ignoring any possible changed of length, since
4343 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4345 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4347 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4350 /* Do the if() outside the #ifdef to avoid warnings about an unused
4353 #ifdef PERL_RELOCATABLE_INC
4355 * Relocatable include entries are marked with a leading .../
4358 * 0: Remove that leading ".../"
4359 * 1: Remove trailing executable name (anything after the last '/')
4360 * from the perl path to give a perl prefix
4362 * While the @INC element starts "../" and the prefix ends with a real
4363 * directory (ie not . or ..) chop that real directory off the prefix
4364 * and the leading "../" from the @INC element. ie a logical "../"
4366 * Finally concatenate the prefix and the remainder of the @INC element
4367 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4368 * generates /usr/local/lib/perl5
4370 const char *libpath = SvPVX(libdir);
4371 STRLEN libpath_len = SvCUR(libdir);
4372 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4374 SV * const caret_X = get_sv("\030", 0);
4375 /* Going to use the SV just as a scratch buffer holding a C
4381 /* $^X is *the* source of taint if tainting is on, hence
4382 SvPOK() won't be true. */
4384 assert(SvPOKp(caret_X));
4385 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4387 /* Firstly take off the leading .../
4388 If all else fail we'll do the paths relative to the current
4390 sv_chop(libdir, libpath + 4);
4391 /* Don't use SvPV as we're intentionally bypassing taining,
4392 mortal copies that the mg_get of tainting creates, and
4393 corruption that seems to come via the save stack.
4394 I guess that the save stack isn't correctly set up yet. */
4395 libpath = SvPVX(libdir);
4396 libpath_len = SvCUR(libdir);
4398 /* This would work more efficiently with memrchr, but as it's
4399 only a GNU extension we'd need to probe for it and
4400 implement our own. Not hard, but maybe not worth it? */
4402 prefix = SvPVX(prefix_sv);
4403 lastslash = strrchr(prefix, '/');
4405 /* First time in with the *lastslash = '\0' we just wipe off
4406 the trailing /perl from (say) /usr/foo/bin/perl
4410 while ((*lastslash = '\0'), /* Do that, come what may. */
4411 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4412 && (lastslash = strrchr(prefix, '/')))) {
4413 if (lastslash[1] == '\0'
4414 || (lastslash[1] == '.'
4415 && (lastslash[2] == '/' /* ends "/." */
4416 || (lastslash[2] == '/'
4417 && lastslash[3] == '/' /* or "/.." */
4419 /* Prefix ends "/" or "/." or "/..", any of which
4420 are fishy, so don't do any more logical cleanup.
4424 /* Remove leading "../" from path */
4427 /* Next iteration round the loop removes the last
4428 directory name from prefix by writing a '\0' in
4429 the while clause. */
4431 /* prefix has been terminated with a '\0' to the correct
4432 length. libpath points somewhere into the libdir SV.
4433 We need to join the 2 with '/' and drop the result into
4435 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4436 SvREFCNT_dec(libdir);
4437 /* And this is the new libdir. */
4440 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4441 /* Need to taint reloccated paths if running set ID */
4442 SvTAINTED_on(libdir);
4445 SvREFCNT_dec(prefix_sv);
4450 * BEFORE pushing libdir onto @INC we may first push version- and
4451 * archname-specific sub-directories.
4453 if (using_sub_dirs) {
4455 #ifdef PERL_INC_VERSION_LIST
4456 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4457 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4458 const char * const *incver;
4465 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4467 while (unix[len-1] == '/') len--; /* Cosmetic */
4468 sv_usepvn(libdir,unix,len);
4471 PerlIO_printf(Perl_error_log,
4472 "Failed to unixify @INC element \"%s\"\n",
4476 subdir = newSVsv(libdir);
4478 if (add_versioned_sub_dirs) {
4479 /* .../version/archname if -d .../version/archname */
4480 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4481 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4483 /* .../version if -d .../version */
4484 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4485 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4488 #ifdef PERL_INC_VERSION_LIST
4490 for (incver = incverlist; *incver; incver++) {
4491 /* .../xxx if -d .../xxx */
4492 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4493 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4498 if (add_archonly_sub_dirs) {
4499 /* .../archname if -d .../archname */
4500 sv_catpvs(subdir, "/" ARCHNAME);
4501 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4505 assert (SvREFCNT(subdir) == 1);
4506 SvREFCNT_dec(subdir);
4509 /* finally add this lib directory at the end of @INC */
4511 U32 extra = av_len(av) + 1;
4512 av_unshift(inc, extra + push_basedir);
4514 av_store(inc, extra, libdir);
4516 /* av owns a reference, av_store() expects to be donated a
4517 reference, and av expects to be sane when it's cleared.
4518 If I wanted to be naughty and wrong, I could peek inside the
4519 implementation of av_clear(), realise that it uses
4520 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4521 and so directly steal from it (with a memcpy() to inc, and
4522 then memset() to NULL them out. But people copy code from the
4523 core expecting it to be best practise, so let's use the API.
4524 Although studious readers will note that I'm not checking any
4526 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4530 else if (push_basedir) {
4531 av_push(inc, libdir);
4534 if (!push_basedir) {
4535 assert (SvREFCNT(libdir) == 1);
4536 SvREFCNT_dec(libdir);
4542 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4546 /* This logic has been broken out from S_incpush(). It may be possible to
4549 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4556 /* Break at all separators */
4557 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4559 /* skip any consecutive separators */
4561 /* Uncomment the next line for PATH semantics */
4562 /* But you'll need to write tests */
4563 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4565 incpush(p, (STRLEN)(s - p), flags);
4570 incpush(p, (STRLEN)(end - p), flags);
4575 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4579 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4585 PERL_ARGS_ASSERT_CALL_LIST;
4587 while (av_len(paramList) >= 0) {
4588 cv = MUTABLE_CV(av_shift(paramList));
4590 if (paramList == PL_beginav) {
4591 /* save PL_beginav for compiler */
4592 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4594 else if (paramList == PL_checkav) {
4595 /* save PL_checkav for compiler */
4596 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4598 else if (paramList == PL_unitcheckav) {
4599 /* save PL_unitcheckav for compiler */
4600 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4611 PL_madskills |= 16384;
4616 PL_madskills &= ~16384;
4619 (void)SvPV_const(atsv, len);
4621 PL_curcop = &PL_compiling;
4622 CopLINE_set(PL_curcop, oldline);
4623 if (paramList == PL_beginav)
4624 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4626 Perl_sv_catpvf(aTHX_ atsv,
4627 "%s failed--call queue aborted",
4628 paramList == PL_checkav ? "CHECK"
4629 : paramList == PL_initav ? "INIT"
4630 : paramList == PL_unitcheckav ? "UNITCHECK"
4632 while (PL_scopestack_ix > oldscope)
4635 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4642 /* my_exit() was called */
4643 while (PL_scopestack_ix > oldscope)
4646 PL_curstash = PL_defstash;
4647 PL_curcop = &PL_compiling;
4648 CopLINE_set(PL_curcop, oldline);
4654 PL_curcop = &PL_compiling;
4655 CopLINE_set(PL_curcop, oldline);
4658 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4667 Perl_my_exit(pTHX_ U32 status)
4678 STATUS_EXIT_SET(status);
4685 Perl_my_failure_exit(pTHX)
4689 /* We have been called to fall on our sword. The desired exit code
4690 * should be already set in STATUS_UNIX, but could be shifted over
4691 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4694 * If an error code has not been set, then force the issue.
4696 if (MY_POSIX_EXIT) {
4698 /* According to the die_exit.t tests, if errno is non-zero */
4699 /* It should be used for the error status. */
4701 if (errno == EVMSERR) {
4702 STATUS_NATIVE = vaxc$errno;
4705 /* According to die_exit.t tests, if the child_exit code is */
4706 /* also zero, then we need to exit with a code of 255 */
4707 if ((errno != 0) && (errno < 256))
4708 STATUS_UNIX_EXIT_SET(errno);
4709 else if (STATUS_UNIX < 255) {
4710 STATUS_UNIX_EXIT_SET(255);
4715 /* The exit code could have been set by $? or vmsish which
4716 * means that it may not have fatal set. So convert
4717 * success/warning codes to fatal with out changing
4718 * the POSIX status code. The severity makes VMS native
4719 * status handling work, while UNIX mode programs use the
4720 * the POSIX exit codes.
4722 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4723 STATUS_NATIVE &= STS$M_COND_ID;
4724 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4728 /* Traditionally Perl on VMS always expects a Fatal Error. */
4729 if (vaxc$errno & 1) {
4731 /* So force success status to failure */
4732 if (STATUS_NATIVE & 1)
4737 STATUS_UNIX = EINTR; /* In case something cares */
4742 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4744 /* Encode the severity code */
4745 severity = STATUS_NATIVE & STS$M_SEVERITY;
4746 STATUS_UNIX = (severity ? severity : 1) << 8;
4748 /* Perl expects this to be a fatal error */
4749 if (severity != STS$K_SEVERE)
4758 STATUS_UNIX_SET(errno);
4760 exitstatus = STATUS_UNIX >> 8;
4761 if (exitstatus & 255)
4762 STATUS_UNIX_SET(exitstatus);
4764 STATUS_UNIX_SET(255);
4771 S_my_exit_jump(pTHX)
4776 SvREFCNT_dec(PL_e_script);
4780 POPSTACK_TO(PL_mainstack);
4788 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4791 const char * const p = SvPVX_const(PL_e_script);
4792 const char *nl = strchr(p, '\n');
4794 PERL_UNUSED_ARG(idx);
4795 PERL_UNUSED_ARG(maxlen);
4797 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4799 filter_del(read_e_script);
4802 sv_catpvn(buf_sv, p, nl-p);
4803 sv_chop(PL_e_script, nl);
4809 * c-indentation-style: bsd
4811 * indent-tabs-mode: t
4814 * ex: set ts=8 sts=4 sw=4 noet: