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);
353 if (!PL_mmap_page_size) {
354 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
356 SETERRNO(0, SS_NORMAL);
358 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
360 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
362 if ((long) PL_mmap_page_size < 0) {
364 SV * const error = ERRSV;
365 SvUPGRADE(error, SVt_PV);
366 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
369 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 # ifdef HAS_GETPAGESIZE
374 PL_mmap_page_size = getpagesize();
376 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
377 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 if (PL_mmap_page_size <= 0)
382 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
383 (IV) PL_mmap_page_size);
385 #endif /* HAS_MMAP */
387 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
388 PL_timesbase.tms_utime = 0;
389 PL_timesbase.tms_stime = 0;
390 PL_timesbase.tms_cutime = 0;
391 PL_timesbase.tms_cstime = 0;
394 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
396 PL_registered_mros = newHV();
397 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
398 HvMAX(PL_registered_mros) = 0;
404 =for apidoc nothreadhook
406 Stub that provides thread hook for perl_destruct when there are
413 Perl_nothreadhook(pTHX)
419 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
421 Perl_dump_sv_child(pTHX_ SV *sv)
424 const int sock = PL_dumper_fd;
425 const int debug_fd = PerlIO_fileno(Perl_debug_log);
426 union control_un control;
429 struct cmsghdr *cmptr;
431 unsigned char buffer[256];
433 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
435 if(sock == -1 || debug_fd == -1)
438 PerlIO_flush(Perl_debug_log);
440 /* All these shenanigans are to pass a file descriptor over to our child for
441 it to dump out to. We can't let it hold open the file descriptor when it
442 forks, as the file descriptor it will dump to can turn out to be one end
443 of pipe that some other process will wait on for EOF. (So as it would
444 be open, the wait would be forever.) */
446 msg.msg_control = control.control;
447 msg.msg_controllen = sizeof(control.control);
448 /* We're a connected socket so we don't need a destination */
454 cmptr = CMSG_FIRSTHDR(&msg);
455 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
456 cmptr->cmsg_level = SOL_SOCKET;
457 cmptr->cmsg_type = SCM_RIGHTS;
458 *((int *)CMSG_DATA(cmptr)) = 1;
460 vec[0].iov_base = (void*)&sv;
461 vec[0].iov_len = sizeof(sv);
462 got = sendmsg(sock, &msg, 0);
465 perror("Debug leaking scalars parent sendmsg failed");
468 if(got < sizeof(sv)) {
469 perror("Debug leaking scalars parent short sendmsg");
473 /* Return protocol is
475 unsigned char: length of location string (0 for empty)
476 unsigned char*: string (not terminated)
478 vec[0].iov_base = (void*)&returned_errno;
479 vec[0].iov_len = sizeof(returned_errno);
480 vec[1].iov_base = buffer;
483 got = readv(sock, vec, 2);
486 perror("Debug leaking scalars parent read failed");
487 PerlIO_flush(PerlIO_stderr());
490 if(got < sizeof(returned_errno) + 1) {
491 perror("Debug leaking scalars parent short read");
492 PerlIO_flush(PerlIO_stderr());
497 got = read(sock, buffer + 1, *buffer);
499 perror("Debug leaking scalars parent read 2 failed");
500 PerlIO_flush(PerlIO_stderr());
505 perror("Debug leaking scalars parent short read 2");
506 PerlIO_flush(PerlIO_stderr());
511 if (returned_errno || *buffer) {
512 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
513 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
514 returned_errno, strerror(returned_errno));
520 =for apidoc perl_destruct
522 Shuts down a Perl interpreter. See L<perlembed>.
531 VOL signed char destruct_level; /* see possible values in intrpvar.h */
533 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
537 PERL_ARGS_ASSERT_PERL_DESTRUCT;
539 PERL_UNUSED_ARG(my_perl);
542 assert(PL_scopestack_ix == 1);
544 /* wait for all pseudo-forked children to finish */
545 PERL_WAIT_FOR_CHILDREN;
547 destruct_level = PL_perl_destruct_level;
550 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
552 const int i = atoi(s);
553 if (destruct_level < i)
559 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
565 if (PL_endav && !PL_minus_c)
566 call_list(PL_scopestack_ix, PL_endav);
571 assert(PL_scopestack_ix == 0);
573 /* Need to flush since END blocks can produce output */
576 if (CALL_FPTR(PL_threadhook)(aTHX)) {
577 /* Threads hook has vetoed further cleanup */
578 PL_veto_cleanup = TRUE;
582 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
583 if (destruct_level != 0) {
584 /* Fork here to create a child. Our child's job is to preserve the
585 state of scalars prior to destruction, so that we can instruct it
586 to dump any scalars that we later find have leaked.
587 There's no subtlety in this code - it assumes POSIX, and it doesn't
591 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
592 perror("Debug leaking scalars socketpair failed");
598 perror("Debug leaking scalars fork failed");
602 /* We are the child */
603 const int sock = fd[1];
604 const int debug_fd = PerlIO_fileno(Perl_debug_log);
607 /* Our success message is an integer 0, and a char 0 */
608 static const char success[sizeof(int) + 1] = {0};
612 /* We need to close all other file descriptors otherwise we end up
613 with interesting hangs, where the parent closes its end of a
614 pipe, and sits waiting for (another) child to terminate. Only
615 that child never terminates, because it never gets EOF, because
616 we also have the far end of the pipe open. We even need to
617 close the debugging fd, because sometimes it happens to be one
618 end of a pipe, and a process is waiting on the other end for
619 EOF. Normally it would be closed at some point earlier in
620 destruction, but if we happen to cause the pipe to remain open,
621 EOF never occurs, and we get an infinite hang. Hence all the
622 games to pass in a file descriptor if it's actually needed. */
624 f = sysconf(_SC_OPEN_MAX);
626 where = "sysconf failed";
637 union control_un control;
640 struct cmsghdr *cmptr;
644 msg.msg_control = control.control;
645 msg.msg_controllen = sizeof(control.control);
646 /* We're a connected socket so we don't need a source */
650 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
652 vec[0].iov_base = (void*)⌖
653 vec[0].iov_len = sizeof(target);
655 got = recvmsg(sock, &msg, 0);
660 where = "recv failed";
663 if(got < sizeof(target)) {
664 where = "short recv";
668 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
672 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
673 where = "wrong cmsg_len";
676 if(cmptr->cmsg_level != SOL_SOCKET) {
677 where = "wrong cmsg_level";
680 if(cmptr->cmsg_type != SCM_RIGHTS) {
681 where = "wrong cmsg_type";
685 got_fd = *(int*)CMSG_DATA(cmptr);
686 /* For our last little bit of trickery, put the file descriptor
687 back into Perl_debug_log, as if we never actually closed it
689 if(got_fd != debug_fd) {
690 if (dup2(got_fd, debug_fd) == -1) {
697 PerlIO_flush(Perl_debug_log);
699 got = write(sock, &success, sizeof(success));
702 where = "write failed";
705 if(got < sizeof(success)) {
706 where = "short write";
713 int send_errno = errno;
714 unsigned char length = (unsigned char) strlen(where);
715 struct iovec failure[3] = {
716 {(void*)&send_errno, sizeof(send_errno)},
718 {(void*)where, length}
720 int got = writev(sock, failure, 3);
721 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
722 in the parent if we try to read from the socketpair after the
723 child has exited, even if there was data to read.
724 So sleep a bit to give the parent a fighting chance of
727 _exit((got == -1) ? errno : 0);
731 PL_dumper_fd = fd[0];
736 /* We must account for everything. */
738 /* Destroy the main CV and syntax tree */
739 /* Do this now, because destroying ops can cause new SVs to be generated
740 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
741 PL_curcop to point to a valid op from which the filename structure
743 PL_curcop = &PL_compiling;
745 /* ensure comppad/curpad to refer to main's pad */
746 if (CvPADLIST(PL_main_cv)) {
747 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
749 op_free(PL_main_root);
752 PL_main_start = NULL;
753 SvREFCNT_dec(PL_main_cv);
757 /* Tell PerlIO we are about to tear things apart in case
758 we have layers which are using resources that should
762 PerlIO_destruct(aTHX);
764 if (PL_sv_objcount) {
766 * Try to destruct global references. We do this first so that the
767 * destructors and destructees still exist. Some sv's might remain.
768 * Non-referenced objects are on their own.
772 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
773 PL_defoutgv = NULL; /* may have been freed */
776 /* unhook hooks which will soon be, or use, destroyed data */
777 SvREFCNT_dec(PL_warnhook);
779 SvREFCNT_dec(PL_diehook);
782 /* call exit list functions */
783 while (PL_exitlistlen-- > 0)
784 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
786 Safefree(PL_exitlist);
791 SvREFCNT_dec(PL_registered_mros);
793 /* jettison our possibly duplicated environment */
794 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
795 * so we certainly shouldn't free it here
798 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
799 if (environ != PL_origenviron && !PL_use_safe_putenv
801 /* only main thread can free environ[0] contents */
802 && PL_curinterp == aTHX
808 for (i = 0; environ[i]; i++)
809 safesysfree(environ[i]);
811 /* Must use safesysfree() when working with environ. */
812 safesysfree(environ);
814 environ = PL_origenviron;
817 #endif /* !PERL_MICRO */
819 if (destruct_level == 0) {
821 DEBUG_P(debprofdump());
823 #if defined(PERLIO_LAYERS)
824 /* No more IO - including error messages ! */
825 PerlIO_cleanup(aTHX);
828 CopFILE_free(&PL_compiling);
829 CopSTASH_free(&PL_compiling);
831 /* The exit() function will do everything that needs doing. */
835 /* reset so print() ends up where we expect */
839 /* the syntax tree is shared between clones
840 * so op_free(PL_main_root) only ReREFCNT_dec's
841 * REGEXPs in the parent interpreter
842 * we need to manually ReREFCNT_dec for the clones
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
854 /* XXX can PL_parser still be non-null here? */
855 if(PL_parser && PL_parser->rsfp) {
856 (void)PerlIO_close(PL_parser->rsfp);
857 PL_parser->rsfp = NULL;
861 Safefree(PL_splitstr);
871 PL_doswitches = FALSE;
872 PL_dowarn = G_WARN_OFF;
873 PL_doextract = FALSE;
874 PL_sawampersand = FALSE; /* must save all match strings */
877 Safefree(PL_inplace);
879 SvREFCNT_dec(PL_patchlevel);
882 SvREFCNT_dec(PL_e_script);
888 /* magical thingies */
890 SvREFCNT_dec(PL_ofsgv); /* *, */
893 SvREFCNT_dec(PL_ors_sv); /* $\ */
896 SvREFCNT_dec(PL_rs); /* $/ */
899 Safefree(PL_osname); /* $^O */
902 SvREFCNT_dec(PL_statname);
906 /* defgv, aka *_ should be taken care of elsewhere */
908 /* clean up after study() */
909 SvREFCNT_dec(PL_lastscream);
910 PL_lastscream = NULL;
911 Safefree(PL_screamfirst);
913 Safefree(PL_screamnext);
917 Safefree(PL_efloatbuf);
921 /* startup and shutdown function lists */
922 SvREFCNT_dec(PL_beginav);
923 SvREFCNT_dec(PL_beginav_save);
924 SvREFCNT_dec(PL_endav);
925 SvREFCNT_dec(PL_checkav);
926 SvREFCNT_dec(PL_checkav_save);
927 SvREFCNT_dec(PL_unitcheckav);
928 SvREFCNT_dec(PL_unitcheckav_save);
929 SvREFCNT_dec(PL_initav);
931 PL_beginav_save = NULL;
934 PL_checkav_save = NULL;
935 PL_unitcheckav = NULL;
936 PL_unitcheckav_save = NULL;
939 /* shortcuts just get cleared */
948 PL_last_in_gv = NULL;
960 SvREFCNT_dec(PL_argvout_stack);
961 PL_argvout_stack = NULL;
963 SvREFCNT_dec(PL_modglobal);
965 SvREFCNT_dec(PL_preambleav);
966 PL_preambleav = NULL;
967 SvREFCNT_dec(PL_subname);
969 #ifdef PERL_USES_PL_PIDSTATUS
970 SvREFCNT_dec(PL_pidstatus);
973 SvREFCNT_dec(PL_toptarget);
975 SvREFCNT_dec(PL_bodytarget);
976 PL_bodytarget = NULL;
977 PL_formtarget = NULL;
979 /* free locale stuff */
980 #ifdef USE_LOCALE_COLLATE
981 Safefree(PL_collation_name);
982 PL_collation_name = NULL;
985 #ifdef USE_LOCALE_NUMERIC
986 Safefree(PL_numeric_name);
987 PL_numeric_name = NULL;
988 SvREFCNT_dec(PL_numeric_radix_sv);
989 PL_numeric_radix_sv = NULL;
992 /* clear utf8 character classes */
993 SvREFCNT_dec(PL_utf8_alnum);
994 SvREFCNT_dec(PL_utf8_ascii);
995 SvREFCNT_dec(PL_utf8_alpha);
996 SvREFCNT_dec(PL_utf8_space);
997 SvREFCNT_dec(PL_utf8_cntrl);
998 SvREFCNT_dec(PL_utf8_graph);
999 SvREFCNT_dec(PL_utf8_digit);
1000 SvREFCNT_dec(PL_utf8_upper);
1001 SvREFCNT_dec(PL_utf8_lower);
1002 SvREFCNT_dec(PL_utf8_print);
1003 SvREFCNT_dec(PL_utf8_punct);
1004 SvREFCNT_dec(PL_utf8_xdigit);
1005 SvREFCNT_dec(PL_utf8_mark);
1006 SvREFCNT_dec(PL_utf8_toupper);
1007 SvREFCNT_dec(PL_utf8_totitle);
1008 SvREFCNT_dec(PL_utf8_tolower);
1009 SvREFCNT_dec(PL_utf8_tofold);
1010 SvREFCNT_dec(PL_utf8_idstart);
1011 SvREFCNT_dec(PL_utf8_idcont);
1012 PL_utf8_alnum = NULL;
1013 PL_utf8_ascii = NULL;
1014 PL_utf8_alpha = NULL;
1015 PL_utf8_space = NULL;
1016 PL_utf8_cntrl = NULL;
1017 PL_utf8_graph = NULL;
1018 PL_utf8_digit = NULL;
1019 PL_utf8_upper = NULL;
1020 PL_utf8_lower = NULL;
1021 PL_utf8_print = NULL;
1022 PL_utf8_punct = NULL;
1023 PL_utf8_xdigit = NULL;
1024 PL_utf8_mark = NULL;
1025 PL_utf8_toupper = NULL;
1026 PL_utf8_totitle = NULL;
1027 PL_utf8_tolower = NULL;
1028 PL_utf8_tofold = NULL;
1029 PL_utf8_idstart = NULL;
1030 PL_utf8_idcont = NULL;
1032 if (!specialWARN(PL_compiling.cop_warnings))
1033 PerlMemShared_free(PL_compiling.cop_warnings);
1034 PL_compiling.cop_warnings = NULL;
1035 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1036 PL_compiling.cop_hints_hash = NULL;
1037 CopFILE_free(&PL_compiling);
1038 CopSTASH_free(&PL_compiling);
1040 /* Prepare to destruct main symbol table. */
1045 SvREFCNT_dec(PL_curstname);
1046 PL_curstname = NULL;
1048 /* clear queued errors */
1049 SvREFCNT_dec(PL_errors);
1052 SvREFCNT_dec(PL_isarev);
1055 if (destruct_level >= 2) {
1056 if (PL_scopestack_ix != 0)
1057 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1058 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1059 (long)PL_scopestack_ix);
1060 if (PL_savestack_ix != 0)
1061 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1062 "Unbalanced saves: %ld more saves than restores\n",
1063 (long)PL_savestack_ix);
1064 if (PL_tmps_floor != -1)
1065 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1066 (long)PL_tmps_floor + 1);
1067 if (cxstack_ix != -1)
1068 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1069 (long)cxstack_ix + 1);
1072 /* Now absolutely destruct everything, somehow or other, loops or no. */
1074 /* the 2 is for PL_fdpid and PL_strtab */
1075 while (sv_clean_all() > 2)
1078 AvREAL_off(PL_fdpid); /* no surviving entries */
1079 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1082 #ifdef HAVE_INTERP_INTERN
1086 /* Destruct the global string table. */
1088 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1089 * so that sv_free() won't fail on them.
1090 * Now that the global string table is using a single hunk of memory
1091 * for both HE and HEK, we either need to explicitly unshare it the
1092 * correct way, or actually free things here.
1095 const I32 max = HvMAX(PL_strtab);
1096 HE * const * const array = HvARRAY(PL_strtab);
1097 HE *hent = array[0];
1100 if (hent && ckWARN_d(WARN_INTERNAL)) {
1101 HE * const next = HeNEXT(hent);
1102 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1103 "Unbalanced string table refcount: (%ld) for \"%s\"",
1104 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1111 hent = array[riter];
1116 HvARRAY(PL_strtab) = 0;
1117 HvTOTALKEYS(PL_strtab) = 0;
1118 HvFILL(PL_strtab) = 0;
1120 SvREFCNT_dec(PL_strtab);
1123 /* free the pointer tables used for cloning */
1124 ptr_table_free(PL_ptr_table);
1125 PL_ptr_table = (PTR_TBL_t*)NULL;
1128 /* free special SVs */
1130 SvREFCNT(&PL_sv_yes) = 0;
1131 sv_clear(&PL_sv_yes);
1132 SvANY(&PL_sv_yes) = NULL;
1133 SvFLAGS(&PL_sv_yes) = 0;
1135 SvREFCNT(&PL_sv_no) = 0;
1136 sv_clear(&PL_sv_no);
1137 SvANY(&PL_sv_no) = NULL;
1138 SvFLAGS(&PL_sv_no) = 0;
1142 for (i=0; i<=2; i++) {
1143 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1144 sv_clear(PERL_DEBUG_PAD(i));
1145 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1146 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1150 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1151 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1153 #ifdef DEBUG_LEAKING_SCALARS
1154 if (PL_sv_count != 0) {
1159 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1160 svend = &sva[SvREFCNT(sva)];
1161 for (sv = sva + 1; sv < svend; ++sv) {
1162 if (SvTYPE(sv) != SVTYPEMASK) {
1163 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1165 " refcnt=%"UVuf pTHX__FORMAT "\n"
1166 "\tallocated at %s:%d %s %s%s; serial %"UVuf"\n",
1167 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1169 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1171 sv->sv_debug_inpad ? "for" : "by",
1172 sv->sv_debug_optype ?
1173 PL_op_name[sv->sv_debug_optype]: "(none)",
1174 sv->sv_debug_cloned ? " (cloned)" : "",
1177 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1178 Perl_dump_sv_child(aTHX_ sv);
1184 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1188 /* Wait for up to 4 seconds for child to terminate.
1189 This seems to be the least effort way of timing out on reaping
1191 struct timeval waitfor = {4, 0};
1192 int sock = PL_dumper_fd;
1196 FD_SET(sock, &rset);
1197 select(sock + 1, &rset, NULL, NULL, &waitfor);
1198 waitpid(child, &status, WNOHANG);
1203 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1209 #ifdef PERL_DEBUG_READONLY_OPS
1215 #if defined(PERLIO_LAYERS)
1216 /* No more IO - including error messages ! */
1217 PerlIO_cleanup(aTHX);
1220 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1221 as currently layers use it rather than NULL as a marker
1222 for no arg - and will try and SvREFCNT_dec it.
1224 SvREFCNT(&PL_sv_undef) = 0;
1225 SvREADONLY_off(&PL_sv_undef);
1227 Safefree(PL_origfilename);
1228 PL_origfilename = NULL;
1229 Safefree(PL_reg_start_tmp);
1230 PL_reg_start_tmp = (char**)NULL;
1231 PL_reg_start_tmpl = 0;
1232 Safefree(PL_reg_curpm);
1233 Safefree(PL_reg_poscache);
1234 free_tied_hv_pool();
1235 Safefree(PL_op_mask);
1236 Safefree(PL_psig_name);
1237 PL_psig_name = (SV**)NULL;
1238 PL_psig_ptr = (SV**)NULL;
1239 Safefree(PL_psig_pend);
1240 PL_psig_pend = (int*)NULL;
1242 /* We need to NULL PL_psig_pend first, so that
1243 signal handlers know not to use it */
1244 int *psig_save = PL_psig_pend;
1245 PL_psig_pend = (int*)NULL;
1246 Safefree(psig_save);
1250 PL_tainting = FALSE;
1251 PL_taint_warn = FALSE;
1252 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1255 DEBUG_P(debprofdump());
1257 #ifdef USE_REENTRANT_API
1258 Perl_reentrant_free(aTHX);
1263 while (PL_regmatch_slab) {
1264 regmatch_slab *s = PL_regmatch_slab;
1265 PL_regmatch_slab = PL_regmatch_slab->next;
1269 /* As the absolutely last thing, free the non-arena SV for mess() */
1272 /* we know that type == SVt_PVMG */
1274 /* it could have accumulated taint magic */
1277 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1278 moremagic = mg->mg_moremagic;
1279 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1281 Safefree(mg->mg_ptr);
1285 /* we know that type >= SVt_PV */
1286 SvPV_free(PL_mess_sv);
1287 Safefree(SvANY(PL_mess_sv));
1288 Safefree(PL_mess_sv);
1295 =for apidoc perl_free
1297 Releases a Perl interpreter. See L<perlembed>.
1307 PERL_ARGS_ASSERT_PERL_FREE;
1309 if (PL_veto_cleanup)
1312 #ifdef PERL_TRACK_MEMPOOL
1315 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1316 * value as we're probably hunting memory leaks then
1318 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1319 if (!s || atoi(s) == 0) {
1320 const U32 old_debug = PL_debug;
1321 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1322 thread at thread exit. */
1324 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1325 "free this thread's memory\n");
1326 PL_debug &= ~ DEBUG_m_FLAG;
1328 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1329 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1330 PL_debug = old_debug;
1335 #if defined(WIN32) || defined(NETWARE)
1336 # if defined(PERL_IMPLICIT_SYS)
1339 void *host = nw_internal_host;
1341 void *host = w32_internal_host;
1343 PerlMem_free(aTHXx);
1345 nw_delete_internal_host(host);
1347 win32_delete_internal_host(host);
1351 PerlMem_free(aTHXx);
1354 PerlMem_free(aTHXx);
1358 #if defined(USE_ITHREADS)
1359 /* provide destructors to clean up the thread key when libperl is unloaded */
1360 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1362 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1363 #pragma fini "perl_fini"
1364 #elif defined(__sun) && !defined(__GNUC__)
1365 #pragma fini (perl_fini)
1369 #if defined(__GNUC__)
1370 __attribute__((destructor))
1375 if (PL_curinterp && !PL_veto_cleanup)
1380 #endif /* THREADS */
1383 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1386 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1387 PL_exitlist[PL_exitlistlen].fn = fn;
1388 PL_exitlist[PL_exitlistlen].ptr = ptr;
1392 #ifdef HAS_PROCSELFEXE
1393 /* This is a function so that we don't hold on to MAXPATHLEN
1394 bytes of stack longer than necessary
1397 S_procself_val(pTHX_ SV *sv, const char *arg0)
1399 char buf[MAXPATHLEN];
1400 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1402 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1403 includes a spurious NUL which will cause $^X to fail in system
1404 or backticks (this will prevent extensions from being built and
1405 many tests from working). readlink is not meant to add a NUL.
1406 Normal readlink works fine.
1408 if (len > 0 && buf[len-1] == '\0') {
1412 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1413 returning the text "unknown" from the readlink rather than the path
1414 to the executable (or returning an error from the readlink). Any valid
1415 path has a '/' in it somewhere, so use that to validate the result.
1416 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1418 if (len > 0 && memchr(buf, '/', len)) {
1419 sv_setpvn(sv,buf,len);
1425 #endif /* HAS_PROCSELFEXE */
1428 S_set_caret_X(pTHX) {
1430 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1432 #ifdef HAS_PROCSELFEXE
1433 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1436 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1438 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1445 =for apidoc perl_parse
1447 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1453 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1460 PERL_ARGS_ASSERT_PERL_PARSE;
1461 #ifndef MULTIPLICITY
1462 PERL_UNUSED_ARG(my_perl);
1465 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1466 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1467 * This MUST be done before any hash stores or fetches take place.
1468 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1469 * yourself, it is your responsibility to provide a good random seed!
1470 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1471 if (!PL_rehash_seed_set)
1472 PL_rehash_seed = get_hash_seed();
1474 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1476 if (s && (atoi(s) == 1))
1477 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1479 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1484 if (PL_origalen != 0) {
1485 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1488 /* Set PL_origalen be the sum of the contiguous argv[]
1489 * elements plus the size of the env in case that it is
1490 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1491 * as the maximum modifiable length of $0. In the worst case
1492 * the area we are able to modify is limited to the size of
1493 * the original argv[0]. (See below for 'contiguous', though.)
1495 const char *s = NULL;
1498 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1499 /* Do the mask check only if the args seem like aligned. */
1501 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1503 /* See if all the arguments are contiguous in memory. Note
1504 * that 'contiguous' is a loose term because some platforms
1505 * align the argv[] and the envp[]. If the arguments look
1506 * like non-aligned, assume that they are 'strictly' or
1507 * 'traditionally' contiguous. If the arguments look like
1508 * aligned, we just check that they are within aligned
1509 * PTRSIZE bytes. As long as no system has something bizarre
1510 * like the argv[] interleaved with some other data, we are
1511 * fine. (Did I just evoke Murphy's Law?) --jhi */
1512 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1514 for (i = 1; i < PL_origargc; i++) {
1515 if ((PL_origargv[i] == s + 1
1517 || PL_origargv[i] == s + 2
1522 (PL_origargv[i] > s &&
1524 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1535 #ifndef PERL_USE_SAFE_PUTENV
1536 /* Can we grab env area too to be used as the area for $0? */
1537 if (s && PL_origenviron && !PL_use_safe_putenv) {
1538 if ((PL_origenviron[0] == s + 1)
1541 (PL_origenviron[0] > s &&
1542 PL_origenviron[0] <=
1543 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1546 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1547 s = PL_origenviron[0];
1550 my_setenv("NoNe SuCh", NULL);
1551 /* Force copy of environment. */
1552 for (i = 1; PL_origenviron[i]; i++) {
1553 if (PL_origenviron[i] == s + 1
1556 (PL_origenviron[i] > s &&
1557 PL_origenviron[i] <=
1558 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1561 s = PL_origenviron[i];
1569 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1571 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1576 /* Come here if running an undumped a.out. */
1578 PL_origfilename = savepv(argv[0]);
1579 PL_do_undump = FALSE;
1580 cxstack_ix = -1; /* start label stack again */
1582 assert (!PL_tainted);
1584 S_set_caret_X(aTHX);
1586 init_postdump_symbols(argc,argv,env);
1591 op_free(PL_main_root);
1592 PL_main_root = NULL;
1594 PL_main_start = NULL;
1595 SvREFCNT_dec(PL_main_cv);
1599 oldscope = PL_scopestack_ix;
1600 PL_dowarn = G_WARN_OFF;
1605 parse_body(env,xsinit);
1607 call_list(oldscope, PL_unitcheckav);
1609 call_list(oldscope, PL_checkav);
1616 /* my_exit() was called */
1617 while (PL_scopestack_ix > oldscope)
1620 PL_curstash = PL_defstash;
1622 call_list(oldscope, PL_unitcheckav);
1624 call_list(oldscope, PL_checkav);
1628 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1636 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1637 miniperl, and we need to see those flags reflected in the values here. */
1639 /* What this returns is subject to change. Use the public interface in Config.
1642 S_Internals_V(pTHX_ CV *cv)
1645 #ifdef LOCAL_PATCH_COUNT
1646 const int local_patch_count = LOCAL_PATCH_COUNT;
1648 const int local_patch_count = 0;
1650 const int entries = 3 + local_patch_count;
1652 static char non_bincompat_options[] =
1659 # ifdef PERL_DISABLE_PMC
1662 # ifdef PERL_DONT_CREATE_GVSV
1663 " PERL_DONT_CREATE_GVSV"
1665 # ifdef PERL_IS_MINIPERL
1668 # ifdef PERL_MALLOC_WRAP
1671 # ifdef PERL_MEM_LOG
1674 # ifdef PERL_MEM_LOG_NOIMPL
1675 " PERL_MEM_LOG_NOIMPL"
1677 # ifdef PERL_USE_DEVEL
1680 # ifdef PERL_USE_SAFE_PUTENV
1681 " PERL_USE_SAFE_PUTENV"
1683 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1684 " USE_ATTRIBUTES_FOR_PERLIO"
1686 # ifdef USE_FAST_STDIO
1689 # ifdef USE_SITECUSTOMIZE
1690 " USE_SITECUSTOMIZE"
1693 PERL_UNUSED_ARG(cv);
1694 PERL_UNUSED_ARG(items);
1696 EXTEND(SP, entries);
1698 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1699 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1700 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1704 PUSHs(Perl_newSVpvn_flags(aTHX_
1705 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1708 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1712 PUSHs(&PL_sv_undef);
1715 for (i = 1; i <= local_patch_count; i++) {
1716 /* This will be an undef, if PL_localpatches[i] is NULL. */
1717 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1723 #define INCPUSH_UNSHIFT 0x01
1724 #define INCPUSH_ADD_OLD_VERS 0x02
1725 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1726 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1727 #define INCPUSH_NOT_BASEDIR 0x10
1728 #define INCPUSH_CAN_RELOCATE 0x20
1729 #define INCPUSH_ADD_SUB_DIRS \
1730 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1733 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1737 int argc = PL_origargc;
1738 char **argv = PL_origargv;
1739 const char *scriptname = NULL;
1740 VOL bool dosearch = FALSE;
1742 const char *cddir = NULL;
1743 #ifdef USE_SITECUSTOMIZE
1744 bool minus_f = FALSE;
1746 SV *linestr_sv = newSV_type(SVt_PVIV);
1747 bool add_read_e_script = FALSE;
1749 SvGROW(linestr_sv, 80);
1750 sv_setpvs(linestr_sv,"");
1756 for (argc--,argv++; argc > 0; argc--,argv++) {
1757 if (argv[0][0] != '-' || !argv[0][1])
1763 #ifndef PERL_STRICT_CR
1787 if ((s = moreswitches(s)))
1792 CHECK_MALLOC_TOO_LATE_FOR('t');
1793 if( !PL_tainting ) {
1794 PL_taint_warn = TRUE;
1800 CHECK_MALLOC_TOO_LATE_FOR('T');
1802 PL_taint_warn = FALSE;
1810 forbid_setid('e', FALSE);
1812 PL_e_script = newSVpvs("");
1813 add_read_e_script = TRUE;
1816 sv_catpv(PL_e_script, s);
1818 sv_catpv(PL_e_script, argv[1]);
1822 Perl_croak(aTHX_ "No code specified for -%c", c);
1823 sv_catpvs(PL_e_script, "\n");
1827 #ifdef USE_SITECUSTOMIZE
1833 case 'I': /* -I handled both here and in moreswitches() */
1834 forbid_setid('I', FALSE);
1835 if (!*++s && (s=argv[1]) != NULL) {
1839 STRLEN len = strlen(s);
1840 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1843 Perl_croak(aTHX_ "No directory specified for -I");
1846 forbid_setid('S', FALSE);
1855 opts_prog = newSVpvs("use Config; Config::_V()");
1859 opts_prog = Perl_newSVpvf(aTHX_
1860 "use Config; Config::config_vars(qw%c%s%c)",
1864 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1865 /* don't look for script or read stdin */
1866 scriptname = BIT_BUCKET;
1870 PL_doextract = TRUE;
1878 if (!*++s || isSPACE(*s)) {
1882 /* catch use of gnu style long options */
1883 if (strEQ(s, "version")) {
1887 if (strEQ(s, "help")) {
1894 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1905 #ifndef SECURE_INTERNAL_GETENV
1908 (s = PerlEnv_getenv("PERL5OPT")))
1912 if (*s == '-' && *(s+1) == 'T') {
1913 CHECK_MALLOC_TOO_LATE_FOR('T');
1915 PL_taint_warn = FALSE;
1918 char *popt_copy = NULL;
1931 if (!strchr("CDIMUdmtwW", *s))
1932 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1936 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1937 s = popt_copy + (s - d);
1945 if( !PL_tainting ) {
1946 PL_taint_warn = TRUE;
1957 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1959 /* SITELIB_EXP is a function call on Win32.
1960 The games with local $! are to avoid setting errno if there is no
1961 sitecustomize script. */
1962 const char *const sitelib = SITELIB_EXP;
1963 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1965 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1970 scriptname = argv[0];
1973 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1975 else if (scriptname == NULL) {
1977 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1983 /* Set $^X early so that it can be used for relocatable paths in @INC */
1984 assert (!PL_tainted);
1986 S_set_caret_X(aTHX);
1991 bool suidscript = FALSE;
1993 open_script(scriptname, dosearch, &suidscript, &rsfp);
1995 validate_suid(validarg, scriptname, fdscript, suidscript,
1999 # if defined(SIGCHLD) || defined(SIGCLD)
2002 # define SIGCHLD SIGCLD
2004 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2005 if (sigstate == (Sighandler_t) SIG_IGN) {
2006 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2007 "Can't ignore signal CHLD, forcing to default");
2008 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2016 /* This will croak if suidscript is true, as -x cannot be used with
2018 forbid_setid('x', suidscript);
2019 /* Hence you can't get here if suidscript is true */
2021 find_beginning(linestr_sv, rsfp);
2022 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2023 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2027 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2028 CvUNIQUE_on(PL_compcv);
2030 CvPADLIST(PL_compcv) = pad_new(0);
2032 PL_isarev = newHV();
2035 boot_core_UNIVERSAL();
2037 newXS("Internals::V", S_Internals_V, __FILE__);
2040 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2042 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2048 # ifdef HAS_SOCKS5_INIT
2049 socks5_init(argv[0]);
2055 init_predump_symbols();
2056 /* init_postdump_symbols not currently designed to be called */
2057 /* more than once (ENV isn't cleared first, for example) */
2058 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2060 init_postdump_symbols(argc,argv,env);
2062 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2063 * or explicitly in some platforms.
2064 * locale.c:Perl_init_i18nl10n() if the environment
2065 * look like the user wants to use UTF-8. */
2066 #if defined(__SYMBIAN32__)
2067 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2069 # ifndef PERL_IS_MINIPERL
2071 /* Requires init_predump_symbols(). */
2072 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2077 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2078 * and the default open disciplines. */
2079 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2080 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2082 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2083 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2084 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2086 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2087 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2088 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2090 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2091 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2092 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2094 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2095 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2098 sv_setpvs(sv, ":utf8\0:utf8");
2100 sv_setpvs(sv, ":utf8\0");
2103 sv_setpvs(sv, "\0:utf8");
2112 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2113 if (strEQ(s, "unsafe"))
2114 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2115 else if (strEQ(s, "safe"))
2116 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2118 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2125 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2129 PL_xmlfp = PerlIO_stdout();
2131 PL_xmlfp = PerlIO_open(s, "w");
2133 Perl_croak(aTHX_ "Can't open %s", s);
2135 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2141 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2142 PL_madskills = atoi(s);
2143 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2148 lex_start(linestr_sv, rsfp, TRUE);
2149 PL_subname = newSVpvs("main");
2151 if (add_read_e_script)
2152 filter_add(read_e_script, NULL);
2154 /* now parse the script */
2156 SETERRNO(0,SS_NORMAL);
2157 if (yyparse() || PL_parser->error_count) {
2159 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2161 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2165 CopLINE_set(PL_curcop, 0);
2166 PL_curstash = PL_defstash;
2168 SvREFCNT_dec(PL_e_script);
2176 SAVECOPFILE(PL_curcop);
2177 SAVECOPLINE(PL_curcop);
2178 gv_check(PL_defstash);
2187 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2188 dump_mstats("after compilation:");
2198 =for apidoc perl_run
2200 Tells a Perl interpreter to run. See L<perlembed>.
2213 PERL_ARGS_ASSERT_PERL_RUN;
2214 #ifndef MULTIPLICITY
2215 PERL_UNUSED_ARG(my_perl);
2218 oldscope = PL_scopestack_ix;
2226 cxstack_ix = -1; /* start context stack again */
2228 case 0: /* normal completion */
2232 case 2: /* my_exit() */
2233 while (PL_scopestack_ix > oldscope)
2236 PL_curstash = PL_defstash;
2237 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2238 PL_endav && !PL_minus_c)
2239 call_list(oldscope, PL_endav);
2241 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2242 dump_mstats("after execution: ");
2248 POPSTACK_TO(PL_mainstack);
2251 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2262 S_run_body(pTHX_ I32 oldscope)
2265 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2266 PL_sawampersand ? "Enabling" : "Omitting"));
2268 if (!PL_restartop) {
2272 exit(0); /* less likely to core dump than my_exit(0) */
2276 if (DEBUG_x_TEST || DEBUG_B_TEST)
2277 dump_all_perl(!DEBUG_B_TEST);
2279 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2283 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2286 if (PERLDB_SINGLE && PL_DBsingle)
2287 sv_setiv(PL_DBsingle, 1);
2289 call_list(oldscope, PL_initav);
2290 #ifdef PERL_DEBUG_READONLY_OPS
2291 Perl_pending_Slabs_to_ro(aTHX);
2298 PL_op = PL_restartop;
2302 else if (PL_main_start) {
2303 CvDEPTH(PL_main_cv) = 1;
2304 PL_op = PL_main_start;
2312 =head1 SV Manipulation Functions
2314 =for apidoc p||get_sv
2316 Returns the SV of the specified Perl scalar. C<flags> are passed to
2317 C<gv_fetchpv>. If C<GV_ADD> is set and the
2318 Perl variable does not exist then it will be created. If C<flags> is zero
2319 and the variable does not exist then NULL is returned.
2325 Perl_get_sv(pTHX_ const char *name, I32 flags)
2329 PERL_ARGS_ASSERT_GET_SV;
2331 gv = gv_fetchpv(name, flags, SVt_PV);
2338 =head1 Array Manipulation Functions
2340 =for apidoc p||get_av
2342 Returns the AV of the specified Perl array. C<flags> are passed to
2343 C<gv_fetchpv>. If C<GV_ADD> is set and the
2344 Perl variable does not exist then it will be created. If C<flags> is zero
2345 and the variable does not exist then NULL is returned.
2351 Perl_get_av(pTHX_ const char *name, I32 flags)
2353 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2355 PERL_ARGS_ASSERT_GET_AV;
2365 =head1 Hash Manipulation Functions
2367 =for apidoc p||get_hv
2369 Returns the HV of the specified Perl hash. C<flags> are passed to
2370 C<gv_fetchpv>. If C<GV_ADD> is set and the
2371 Perl variable does not exist then it will be created. If C<flags> is zero
2372 and the variable does not exist then NULL is returned.
2378 Perl_get_hv(pTHX_ const char *name, I32 flags)
2380 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2382 PERL_ARGS_ASSERT_GET_HV;
2392 =head1 CV Manipulation Functions
2394 =for apidoc p||get_cvn_flags
2396 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2397 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2398 exist then it will be declared (which has the same effect as saying
2399 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2400 then NULL is returned.
2402 =for apidoc p||get_cv
2404 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2410 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2412 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2413 /* XXX this is probably not what they think they're getting.
2414 * It has the same effect as "sub name;", i.e. just a forward
2417 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2419 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2420 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2421 return newSUB(start_subparse(FALSE, 0),
2422 newSVOP(OP_CONST, 0, sv),
2430 /* Nothing in core calls this now, but we can't replace it with a macro and
2431 move it to mathoms.c as a macro would evaluate name twice. */
2433 Perl_get_cv(pTHX_ const char *name, I32 flags)
2435 PERL_ARGS_ASSERT_GET_CV;
2437 return get_cvn_flags(name, strlen(name), flags);
2440 /* Be sure to refetch the stack pointer after calling these routines. */
2444 =head1 Callback Functions
2446 =for apidoc p||call_argv
2448 Performs a callback to the specified Perl sub. See L<perlcall>.
2454 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2456 /* See G_* flags in cop.h */
2457 /* null terminated arg list */
2462 PERL_ARGS_ASSERT_CALL_ARGV;
2467 mXPUSHs(newSVpv(*argv,0));
2472 return call_pv(sub_name, flags);
2476 =for apidoc p||call_pv
2478 Performs a callback to the specified Perl sub. See L<perlcall>.
2484 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2485 /* name of the subroutine */
2486 /* See G_* flags in cop.h */
2488 PERL_ARGS_ASSERT_CALL_PV;
2490 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2494 =for apidoc p||call_method
2496 Performs a callback to the specified Perl method. The blessed object must
2497 be on the stack. See L<perlcall>.
2503 Perl_call_method(pTHX_ const char *methname, I32 flags)
2504 /* name of the subroutine */
2505 /* See G_* flags in cop.h */
2508 PERL_ARGS_ASSERT_CALL_METHOD;
2510 len = strlen(methname);
2512 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2513 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2516 /* May be called with any of a CV, a GV, or an SV containing the name. */
2518 =for apidoc p||call_sv
2520 Performs a callback to the Perl sub whose name is in the SV. See
2527 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2528 /* See G_* flags in cop.h */
2531 LOGOP myop; /* fake syntax tree node */
2536 bool oldcatch = CATCH_GET;
2538 OP* const oldop = PL_op;
2541 PERL_ARGS_ASSERT_CALL_SV;
2543 if (flags & G_DISCARD) {
2547 if (!(flags & G_WANT)) {
2548 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2553 Zero(&myop, 1, LOGOP);
2554 myop.op_next = NULL;
2555 if (!(flags & G_NOARGS))
2556 myop.op_flags |= OPf_STACKED;
2557 myop.op_flags |= OP_GIMME_REVERSE(flags);
2561 EXTEND(PL_stack_sp, 1);
2562 *++PL_stack_sp = sv;
2564 oldscope = PL_scopestack_ix;
2566 if (PERLDB_SUB && PL_curstash != PL_debstash
2567 /* Handle first BEGIN of -d. */
2568 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2569 /* Try harder, since this may have been a sighandler, thus
2570 * curstash may be meaningless. */
2571 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2572 && !(flags & G_NODEBUG))
2573 PL_op->op_private |= OPpENTERSUB_DB;
2575 if (flags & G_METHOD) {
2576 Zero(&method_op, 1, UNOP);
2577 method_op.op_next = PL_op;
2578 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2579 method_op.op_type = OP_METHOD;
2580 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2581 myop.op_type = OP_ENTERSUB;
2582 PL_op = (OP*)&method_op;
2585 if (!(flags & G_EVAL)) {
2587 CALL_BODY_SUB((OP*)&myop);
2588 retval = PL_stack_sp - (PL_stack_base + oldmark);
2589 CATCH_SET(oldcatch);
2592 myop.op_other = (OP*)&myop;
2594 create_eval_scope(flags|G_FAKINGEVAL);
2602 CALL_BODY_SUB((OP*)&myop);
2603 retval = PL_stack_sp - (PL_stack_base + oldmark);
2604 if (!(flags & G_KEEPERR)) {
2612 /* my_exit() was called */
2613 PL_curstash = PL_defstash;
2620 PL_op = PL_restartop;
2624 PL_stack_sp = PL_stack_base + oldmark;
2625 if ((flags & G_WANT) == G_ARRAY)
2629 *++PL_stack_sp = &PL_sv_undef;
2634 if (PL_scopestack_ix > oldscope)
2635 delete_eval_scope();
2639 if (flags & G_DISCARD) {
2640 PL_stack_sp = PL_stack_base + oldmark;
2649 /* Eval a string. The G_EVAL flag is always assumed. */
2652 =for apidoc p||eval_sv
2654 Tells Perl to C<eval> the string in the SV.
2660 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2662 /* See G_* flags in cop.h */
2666 UNOP myop; /* fake syntax tree node */
2667 VOL I32 oldmark = SP - PL_stack_base;
2670 OP* const oldop = PL_op;
2673 PERL_ARGS_ASSERT_EVAL_SV;
2675 if (flags & G_DISCARD) {
2682 Zero(PL_op, 1, UNOP);
2683 EXTEND(PL_stack_sp, 1);
2684 *++PL_stack_sp = sv;
2686 if (!(flags & G_NOARGS))
2687 myop.op_flags = OPf_STACKED;
2688 myop.op_next = NULL;
2689 myop.op_type = OP_ENTEREVAL;
2690 myop.op_flags |= OP_GIMME_REVERSE(flags);
2691 if (flags & G_KEEPERR)
2692 myop.op_flags |= OPf_SPECIAL;
2694 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2695 * before a PUSHEVAL, which corrupts the stack after a croak */
2696 TAINT_PROPER("eval_sv()");
2702 CALL_BODY_EVAL((OP*)&myop);
2703 retval = PL_stack_sp - (PL_stack_base + oldmark);
2704 if (!(flags & G_KEEPERR)) {
2712 /* my_exit() was called */
2713 PL_curstash = PL_defstash;
2720 PL_op = PL_restartop;
2724 PL_stack_sp = PL_stack_base + oldmark;
2725 if ((flags & G_WANT) == G_ARRAY)
2729 *++PL_stack_sp = &PL_sv_undef;
2735 if (flags & G_DISCARD) {
2736 PL_stack_sp = PL_stack_base + oldmark;
2746 =for apidoc p||eval_pv
2748 Tells Perl to C<eval> the given string and return an SV* result.
2754 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2758 SV* sv = newSVpv(p, 0);
2760 PERL_ARGS_ASSERT_EVAL_PV;
2762 eval_sv(sv, G_SCALAR);
2769 if (croak_on_error && SvTRUE(ERRSV)) {
2770 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2776 /* Require a module. */
2779 =head1 Embedding Functions
2781 =for apidoc p||require_pv
2783 Tells Perl to C<require> the file named by the string argument. It is
2784 analogous to the Perl code C<eval "require '$file'">. It's even
2785 implemented that way; consider using load_module instead.
2790 Perl_require_pv(pTHX_ const char *pv)
2796 PERL_ARGS_ASSERT_REQUIRE_PV;
2798 PUSHSTACKi(PERLSI_REQUIRE);
2800 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2801 eval_sv(sv_2mortal(sv), G_DISCARD);
2807 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2809 /* This message really ought to be max 23 lines.
2810 * Removed -h because the user already knows that option. Others? */
2812 static const char * const usage_msg[] = {
2813 "-0[octal] specify record separator (\\0, if no argument)",
2814 "-a autosplit mode with -n or -p (splits $_ into @F)",
2815 "-C[number/list] enables the listed Unicode features",
2816 "-c check syntax only (runs BEGIN and CHECK blocks)",
2817 "-d[:debugger] run program under debugger",
2818 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2819 "-e program one line of program (several -e's allowed, omit programfile)",
2820 "-E program like -e, but enables all optional features",
2821 "-f don't do $sitelib/sitecustomize.pl at startup",
2822 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2823 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2824 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2825 "-l[octal] enable line ending processing, specifies line terminator",
2826 "-[mM][-]module execute \"use/no module...\" before executing program",
2827 "-n assume \"while (<>) { ... }\" loop around program",
2828 "-p assume loop like -n but print line also, like sed",
2829 "-s enable rudimentary parsing for switches after programfile",
2830 "-S look for programfile using PATH environment variable",
2831 "-t enable tainting warnings",
2832 "-T enable tainting checks",
2833 "-u dump core after parsing program",
2834 "-U allow unsafe operations",
2835 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2836 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2837 "-w enable many useful warnings (RECOMMENDED)",
2838 "-W enable all warnings",
2839 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2840 "-X disable all warnings",
2844 const char * const *p = usage_msg;
2846 PERL_ARGS_ASSERT_USAGE;
2848 PerlIO_printf(PerlIO_stdout(),
2849 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2852 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2855 /* convert a string of -D options (or digits) into an int.
2856 * sets *s to point to the char after the options */
2860 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2862 static const char * const usage_msgd[] = {
2863 " Debugging flag values: (see also -d)",
2864 " p Tokenizing and parsing (with v, displays parse stack)",
2865 " s Stack snapshots (with v, displays all stacks)",
2866 " l Context (loop) stack processing",
2867 " t Trace execution",
2868 " o Method and overloading resolution",
2869 " c String/numeric conversions",
2870 " P Print profiling info, source file input state",
2871 " m Memory and SV allocation",
2872 " f Format processing",
2873 " r Regular expression parsing and execution",
2874 " x Syntax tree dump",
2875 " u Tainting checks",
2876 " H Hash dump -- usurps values()",
2877 " X Scratchpad allocation",
2880 " R Include reference counts of dumped variables (eg when using -Ds)",
2881 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2882 " v Verbose: use in conjunction with other flags",
2884 " A Consistency checks on internal structures",
2885 " q quiet - currently only suppresses the 'EXECUTING' message",
2886 " M trace smart match resolution",
2887 " B dump suBroutine definitions, including special Blocks like BEGIN",
2892 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2895 /* if adding extra options, remember to update DEBUG_MASK */
2896 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2898 for (; isALNUM(**s); (*s)++) {
2899 const char * const d = strchr(debopts,**s);
2901 i |= 1 << (d - debopts);
2902 else if (ckWARN_d(WARN_DEBUGGING))
2903 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2904 "invalid option -D%c, use -D'' to see choices\n", **s);
2907 else if (isDIGIT(**s)) {
2909 for (; isALNUM(**s); (*s)++) ;
2911 else if (givehelp) {
2912 const char *const *p = usage_msgd;
2913 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2916 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2917 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2918 "-Dp not implemented on this platform\n");
2924 /* This routine handles any switches that can be given during run */
2927 Perl_moreswitches(pTHX_ const char *s)
2931 const char option = *s; /* used to remember option in -m/-M code */
2933 PERL_ARGS_ASSERT_MORESWITCHES;
2941 SvREFCNT_dec(PL_rs);
2942 if (s[1] == 'x' && s[2]) {
2943 const char *e = s+=2;
2949 flags = PERL_SCAN_SILENT_ILLDIGIT;
2950 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2951 if (s + numlen < e) {
2952 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2956 PL_rs = newSVpvs("");
2957 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2958 tmps = (U8*)SvPVX(PL_rs);
2959 uvchr_to_utf8(tmps, rschar);
2960 SvCUR_set(PL_rs, UNISKIP(rschar));
2965 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2966 if (rschar & ~((U8)~0))
2967 PL_rs = &PL_sv_undef;
2968 else if (!rschar && numlen >= 2)
2969 PL_rs = newSVpvs("");
2971 char ch = (char)rschar;
2972 PL_rs = newSVpvn(&ch, 1);
2975 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2980 PL_unicode = parse_unicode_opts( (const char **)&s );
2981 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2987 while (*s && !isSPACE(*s)) ++s;
2988 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2999 forbid_setid('d', FALSE);
3002 /* -dt indicates to the debugger that threads will be used */
3003 if (*s == 't' && !isALNUM(s[1])) {
3005 my_setenv("PERL5DB_THREADED", "1");
3008 /* The following permits -d:Mod to accepts arguments following an =
3009 in the fashion that -MSome::Mod does. */
3010 if (*s == ':' || *s == '=') {
3011 const char *start = ++s;
3012 const char *const end = s + strlen(s);
3013 SV * const sv = newSVpvs("use Devel::");
3015 /* We now allow -d:Module=Foo,Bar */
3016 while(isALNUM(*s) || *s==':') ++s;
3018 sv_catpvn(sv, start, end - start);
3020 sv_catpvn(sv, start, s-start);
3021 /* Don't use NUL as q// delimiter here, this string goes in the
3023 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3026 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3030 PL_perldb = PERLDB_ALL;
3037 forbid_setid('D', FALSE);
3039 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3040 #else /* !DEBUGGING */
3041 if (ckWARN_d(WARN_DEBUGGING))
3042 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3043 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3044 for (s++; isALNUM(*s); s++) ;
3049 usage(PL_origargv[0]);
3052 Safefree(PL_inplace);
3053 #if defined(__CYGWIN__) /* do backup extension automagically */
3054 if (*(s+1) == '\0') {
3055 PL_inplace = savepvs(".bak");
3058 #endif /* __CYGWIN__ */
3060 const char * const start = ++s;
3061 while (*s && !isSPACE(*s))
3064 PL_inplace = savepvn(start, s - start);
3068 if (*s == '-') /* Additional switches on #! line. */
3072 case 'I': /* -I handled both here and in parse_body() */
3073 forbid_setid('I', FALSE);
3075 while (*s && isSPACE(*s))
3080 /* ignore trailing spaces (possibly followed by other switches) */
3082 for (e = p; *e && !isSPACE(*e); e++) ;
3086 } while (*p && *p != '-');
3088 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3094 Perl_croak(aTHX_ "No directory specified for -I");
3100 SvREFCNT_dec(PL_ors_sv);
3106 PL_ors_sv = newSVpvs("\n");
3107 numlen = 3 + (*s == '0');
3108 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3112 if (RsPARA(PL_rs)) {
3113 PL_ors_sv = newSVpvs("\n\n");
3116 PL_ors_sv = newSVsv(PL_rs);
3121 forbid_setid('M', FALSE); /* XXX ? */
3124 forbid_setid('m', FALSE); /* XXX ? */
3129 const char *use = "use ";
3131 /* -M-foo == 'no foo' */
3132 /* Leading space on " no " is deliberate, to make both
3133 possibilities the same length. */
3134 if (*s == '-') { use = " no "; ++s; }
3135 sv = newSVpvn(use,4);
3137 /* We allow -M'Module qw(Foo Bar)' */
3138 while(isALNUM(*s) || *s==':') {
3147 Perl_croak(aTHX_ "Module name required with -%c option",
3150 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3151 "contains single ':'",
3152 (int)(s - start), start, option);
3153 end = s + strlen(s);
3155 sv_catpvn(sv, start, end - start);
3156 if (option == 'm') {
3158 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3159 sv_catpvs( sv, " ()");
3162 sv_catpvn(sv, start, s-start);
3163 /* Use NUL as q''-delimiter. */
3164 sv_catpvs(sv, " split(/,/,q\0");
3166 sv_catpvn(sv, s, end - s);
3167 sv_catpvs(sv, "\0)");
3170 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3173 Perl_croak(aTHX_ "Missing argument to -%c", option);
3184 forbid_setid('s', FALSE);
3185 PL_doswitches = TRUE;
3199 PL_do_undump = TRUE;
3207 if (!sv_derived_from(PL_patchlevel, "version"))
3208 upg_version(PL_patchlevel, TRUE);
3211 SV* level= vstringify(PL_patchlevel);
3212 #ifdef PERL_PATCHNUM
3213 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3214 SV *num = newSVpvs(PERL_PATCHNUM "*");
3216 SV *num = newSVpvs(PERL_PATCHNUM);
3219 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3220 SvREFCNT_dec(level);
3223 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3227 PerlIO_printf(PerlIO_stdout(),
3228 "\nThis is perl " STRINGIFY(PERL_REVISION)
3229 ", version " STRINGIFY(PERL_VERSION)
3230 ", subversion " STRINGIFY(PERL_SUBVERSION)
3231 " (%"SVf") built for " ARCHNAME, level
3233 SvREFCNT_dec(level);
3236 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3237 PerlIO_printf(PerlIO_stdout(),
3238 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3239 SVfARG(vstringify(PL_patchlevel))));
3240 PerlIO_printf(PerlIO_stdout(),
3241 Perl_form(aTHX_ " built under %s at %s %s\n",
3242 OSNAME, __DATE__, __TIME__));
3243 PerlIO_printf(PerlIO_stdout(),
3244 Perl_form(aTHX_ " OS Specific Release: %s\n",
3247 #if defined(LOCAL_PATCH_COUNT)
3248 if (LOCAL_PATCH_COUNT > 0)
3249 PerlIO_printf(PerlIO_stdout(),
3250 "\n(with %d registered patch%s, "
3251 "see perl -V for more detail)",
3253 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3256 PerlIO_printf(PerlIO_stdout(),
3257 "\n\nCopyright 1987-2010, Larry Wall\n");
3259 PerlIO_printf(PerlIO_stdout(),
3260 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3263 PerlIO_printf(PerlIO_stdout(),
3264 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3265 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3268 PerlIO_printf(PerlIO_stdout(),
3269 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3270 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "atariST series port, ++jrb bammi@cadence.com\n");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "EPOC port by Olaf Flebbe, 1999-2002\n");
3305 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3306 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3309 #ifdef __SYMBIAN32__
3310 PerlIO_printf(PerlIO_stdout(),
3311 "Symbian port by Nokia, 2004-2005\n");
3313 #ifdef BINARY_BUILD_NOTICE
3314 BINARY_BUILD_NOTICE;
3316 PerlIO_printf(PerlIO_stdout(),
3318 Perl may be copied only under the terms of either the Artistic License or the\n\
3319 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3320 Complete documentation for Perl, including FAQ lists, should be found on\n\
3321 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3322 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3325 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3326 PL_dowarn |= G_WARN_ON;
3331 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3332 if (!specialWARN(PL_compiling.cop_warnings))
3333 PerlMemShared_free(PL_compiling.cop_warnings);
3334 PL_compiling.cop_warnings = pWARN_ALL ;
3338 PL_dowarn = G_WARN_ALL_OFF;
3339 if (!specialWARN(PL_compiling.cop_warnings))
3340 PerlMemShared_free(PL_compiling.cop_warnings);
3341 PL_compiling.cop_warnings = pWARN_NONE ;
3348 if (s[0] == '-') /* Additional switches on #! line. */
3353 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3359 #ifdef ALTERNATE_SHEBANG
3360 case 'S': /* OS/2 needs -S on "extproc" line. */
3364 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3369 /* compliments of Tom Christiansen */
3371 /* unexec() can be found in the Gnu emacs distribution */
3372 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3375 Perl_my_unexec(pTHX)
3377 PERL_UNUSED_CONTEXT;
3379 SV * prog = newSVpv(BIN_EXP, 0);
3380 SV * file = newSVpv(PL_origfilename, 0);
3384 sv_catpvs(prog, "/perl");
3385 sv_catpvs(file, ".perldump");
3387 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3388 /* unexec prints msg to stderr in case of failure */
3389 PerlProc_exit(status);
3392 # include <lib$routines.h>
3393 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3394 # elif defined(WIN32) || defined(__CYGWIN__)
3395 Perl_croak(aTHX_ "dump is not supported");
3397 ABORT(); /* for use with undump */
3402 /* initialize curinterp */
3408 # define PERLVAR(var,type)
3409 # define PERLVARA(var,n,type)
3410 # if defined(PERL_IMPLICIT_CONTEXT)
3411 # define PERLVARI(var,type,init) aTHX->var = init;
3412 # define PERLVARIC(var,type,init) aTHX->var = init;
3414 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3415 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3417 # include "intrpvar.h"
3423 # define PERLVAR(var,type)
3424 # define PERLVARA(var,n,type)
3425 # define PERLVARI(var,type,init) PL_##var = init;
3426 # define PERLVARIC(var,type,init) PL_##var = init;
3427 # include "intrpvar.h"
3434 /* As these are inside a structure, PERLVARI isn't capable of initialising
3436 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3437 PL_reg_poscache = PL_reg_starttry = NULL;
3441 S_init_main_stash(pTHX)
3446 PL_curstash = PL_defstash = newHV();
3447 /* We know that the string "main" will be in the global shared string
3448 table, so it's a small saving to use it rather than allocate another
3450 PL_curstname = newSVpvs_share("main");
3451 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3452 /* If we hadn't caused another reference to "main" to be in the shared
3453 string table above, then it would be worth reordering these two,
3454 because otherwise all we do is delete "main" from it as a consequence
3455 of the SvREFCNT_dec, only to add it again with hv_name_set */
3456 SvREFCNT_dec(GvHV(gv));
3457 hv_name_set(PL_defstash, "main", 4, 0);
3458 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3460 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3462 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3463 GvMULTI_on(PL_incgv);
3464 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3465 GvMULTI_on(PL_hintgv);
3466 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3467 SvREFCNT_inc_simple_void(PL_defgv);
3468 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3469 SvREFCNT_inc_simple_void(PL_errgv);
3470 GvMULTI_on(PL_errgv);
3471 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3472 GvMULTI_on(PL_replgv);
3473 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3474 #ifdef PERL_DONT_CREATE_GVSV
3477 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3479 PL_curstash = PL_defstash;
3480 CopSTASH_set(&PL_compiling, PL_defstash);
3481 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3482 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3484 /* We must init $/ before switches are processed. */
3485 sv_setpvs(get_sv("/", GV_ADD), "\n");
3489 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3490 bool *suidscript, PerlIO **rsfpp)
3495 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3498 PL_origfilename = savepvs("-e");
3501 /* if find_script() returns, it returns a malloc()-ed value */
3502 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3504 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3505 const char *s = scriptname + 8;
3511 * Tell apart "normal" usage of fdscript, e.g.
3512 * with bash on FreeBSD:
3513 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3514 * from usage in suidperl.
3515 * Does any "normal" usage leave garbage after the number???
3516 * Is it a mistake to use a similar /dev/fd/ construct for
3521 * Be supersafe and do some sanity-checks.
3522 * Still, can we be sure we got the right thing?
3525 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3528 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3530 scriptname = savepv(s + 1);
3531 Safefree(PL_origfilename);
3532 PL_origfilename = (char *)scriptname;
3537 CopFILE_free(PL_curcop);
3538 CopFILE_set(PL_curcop, PL_origfilename);
3539 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3540 scriptname = (char *)"";
3541 if (fdscript >= 0) {
3542 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3543 # if defined(HAS_FCNTL) && defined(F_SETFD)
3545 /* ensure close-on-exec */
3546 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3549 else if (!*scriptname) {
3550 forbid_setid(0, *suidscript);
3551 *rsfpp = PerlIO_stdin();
3554 #ifdef FAKE_BIT_BUCKET
3555 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3556 * is called) and still have the "-e" work. (Believe it or not,
3557 * a /dev/null is required for the "-e" to work because source
3558 * filter magic is used to implement it. ) This is *not* a general
3559 * replacement for a /dev/null. What we do here is create a temp
3560 * file (an empty file), open up that as the script, and then
3561 * immediately close and unlink it. Close enough for jazz. */
3562 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3563 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3564 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3565 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3566 FAKE_BIT_BUCKET_TEMPLATE
3568 const char * const err = "Failed to create a fake bit bucket";
3569 if (strEQ(scriptname, BIT_BUCKET)) {
3570 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3571 int tmpfd = mkstemp(tmpname);
3573 scriptname = tmpname;
3576 Perl_croak(aTHX_ err);
3579 scriptname = mktemp(tmpname);
3581 Perl_croak(aTHX_ err);
3586 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3587 #ifdef FAKE_BIT_BUCKET
3588 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3589 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3590 && strlen(scriptname) == sizeof(tmpname) - 1) {
3593 scriptname = BIT_BUCKET;
3595 # if defined(HAS_FCNTL) && defined(F_SETFD)
3597 /* ensure close-on-exec */
3598 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3602 /* PSz 16 Sep 03 Keep neat error message */
3604 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3606 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3607 CopFILE(PL_curcop), Strerror(errno));
3613 * I_SYSSTATVFS HAS_FSTATVFS
3615 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3616 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3617 * here so that metaconfig picks them up. */
3620 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3621 /* Don't even need this function. */
3624 S_validate_suid(pTHX_ PerlIO *rsfp)
3626 PERL_ARGS_ASSERT_VALIDATE_SUID;
3628 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3631 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3632 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3634 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3637 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3638 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3639 /* not set-id, must be wrapped */
3642 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3645 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3649 register const char *s2;
3651 PERL_ARGS_ASSERT_FIND_BEGINNING;
3653 /* skip forward in input to the real script? */
3655 while (PL_doextract) {
3656 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3657 Perl_croak(aTHX_ "No Perl script found in input\n");
3659 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3660 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3661 PL_doextract = FALSE;
3662 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3664 while (*s == ' ' || *s == '\t') s++;
3666 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3667 || s2[-1] == '_') s2--;
3668 if (strnEQ(s2-4,"perl",4))
3669 while ((s = moreswitches(s)))
3681 PL_uid = PerlProc_getuid();
3682 PL_euid = PerlProc_geteuid();
3683 PL_gid = PerlProc_getgid();
3684 PL_egid = PerlProc_getegid();
3686 PL_uid |= PL_gid << 16;
3687 PL_euid |= PL_egid << 16;
3689 /* Should not happen: */
3690 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3691 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3694 * Should go by suidscript, not uid!=euid: why disallow
3695 * system("ls") in scripts run from setuid things?
3696 * Or, is this run before we check arguments and set suidscript?
3697 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3698 * (We never have suidscript, can we be sure to have fdscript?)
3699 * Or must then go by UID checks? See comments in forbid_setid also.
3703 /* This is used very early in the lifetime of the program,
3704 * before even the options are parsed, so PL_tainting has
3705 * not been initialized properly. */
3707 Perl_doing_taint(int argc, char *argv[], char *envp[])
3709 #ifndef PERL_IMPLICIT_SYS
3710 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3711 * before we have an interpreter-- and the whole point of this
3712 * function is to be called at such an early stage. If you are on
3713 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3714 * "tainted because running with altered effective ids', you'll
3715 * have to add your own checks somewhere in here. The two most
3716 * known samples of 'implicitness' are Win32 and NetWare, neither
3717 * of which has much of concept of 'uids'. */
3718 int uid = PerlProc_getuid();
3719 int euid = PerlProc_geteuid();
3720 int gid = PerlProc_getgid();
3721 int egid = PerlProc_getegid();
3728 if (uid && (euid != uid || egid != gid))
3730 #endif /* !PERL_IMPLICIT_SYS */
3731 /* This is a really primitive check; environment gets ignored only
3732 * if -T are the first chars together; otherwise one gets
3733 * "Too late" message. */
3734 if ( argc > 1 && argv[1][0] == '-'
3735 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3740 /* Passing the flag as a single char rather than a string is a slight space
3741 optimisation. The only message that isn't /^-.$/ is
3742 "program input from stdin", which is substituted in place of '\0', which
3743 could never be a command line flag. */
3745 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3748 char string[3] = "-x";
3749 const char *message = "program input from stdin";
3756 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3757 if (PL_euid != PL_uid)
3758 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3759 if (PL_egid != PL_gid)
3760 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3761 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3763 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3767 Perl_init_debugger(pTHX)
3770 HV * const ostash = PL_curstash;
3772 PL_curstash = PL_debstash;
3773 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3775 AvREAL_off(PL_dbargs);
3776 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3777 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3778 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3779 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3780 sv_setiv(PL_DBsingle, 0);
3781 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3782 sv_setiv(PL_DBtrace, 0);
3783 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3784 sv_setiv(PL_DBsignal, 0);
3785 PL_curstash = ostash;
3788 #ifndef STRESS_REALLOC
3789 #define REASONABLE(size) (size)
3791 #define REASONABLE(size) (1) /* unreasonable */
3795 Perl_init_stacks(pTHX)
3798 /* start with 128-item stack and 8K cxstack */
3799 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3800 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3801 PL_curstackinfo->si_type = PERLSI_MAIN;
3802 PL_curstack = PL_curstackinfo->si_stack;
3803 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3805 PL_stack_base = AvARRAY(PL_curstack);
3806 PL_stack_sp = PL_stack_base;
3807 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3809 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3812 PL_tmps_max = REASONABLE(128);
3814 Newx(PL_markstack,REASONABLE(32),I32);
3815 PL_markstack_ptr = PL_markstack;
3816 PL_markstack_max = PL_markstack + REASONABLE(32);
3820 Newx(PL_scopestack,REASONABLE(32),I32);
3822 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3824 PL_scopestack_ix = 0;
3825 PL_scopestack_max = REASONABLE(32);
3827 Newx(PL_savestack,REASONABLE(128),ANY);
3828 PL_savestack_ix = 0;
3829 PL_savestack_max = REASONABLE(128);
3838 while (PL_curstackinfo->si_next)
3839 PL_curstackinfo = PL_curstackinfo->si_next;
3840 while (PL_curstackinfo) {
3841 PERL_SI *p = PL_curstackinfo->si_prev;
3842 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3843 Safefree(PL_curstackinfo->si_cxstack);
3844 Safefree(PL_curstackinfo);
3845 PL_curstackinfo = p;
3847 Safefree(PL_tmps_stack);
3848 Safefree(PL_markstack);
3849 Safefree(PL_scopestack);
3851 Safefree(PL_scopestack_name);
3853 Safefree(PL_savestack);
3858 S_init_predump_symbols(pTHX)
3864 sv_setpvs(get_sv("\"", GV_ADD), " ");
3865 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3867 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3868 GvMULTI_on(PL_stdingv);
3869 io = GvIOp(PL_stdingv);
3870 IoTYPE(io) = IoTYPE_RDONLY;
3871 IoIFP(io) = PerlIO_stdin();
3872 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3874 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3876 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3879 IoTYPE(io) = IoTYPE_WRONLY;
3880 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3882 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3884 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3886 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3887 GvMULTI_on(PL_stderrgv);
3888 io = GvIOp(PL_stderrgv);
3889 IoTYPE(io) = IoTYPE_WRONLY;
3890 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3891 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3893 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3895 PL_statname = newSV(0); /* last filename we did stat on */
3899 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3903 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3905 argc--,argv++; /* skip name of script */
3906 if (PL_doswitches) {
3907 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3911 if (argv[0][1] == '-' && !argv[0][2]) {
3915 if ((s = strchr(argv[0], '='))) {
3916 const char *const start_name = argv[0] + 1;
3917 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3918 TRUE, SVt_PV)), s + 1);
3921 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3924 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3925 GvMULTI_on(PL_argvgv);
3926 (void)gv_AVadd(PL_argvgv);
3927 av_clear(GvAVn(PL_argvgv));
3928 for (; argc > 0; argc--,argv++) {
3929 SV * const sv = newSVpv(argv[0],0);
3930 av_push(GvAVn(PL_argvgv),sv);
3931 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3932 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3935 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3936 (void)sv_utf8_decode(sv);
3942 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3947 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3949 PL_toptarget = newSV_type(SVt_PVFM);
3950 sv_setpvs(PL_toptarget, "");
3951 PL_bodytarget = newSV_type(SVt_PVFM);
3952 sv_setpvs(PL_bodytarget, "");
3953 PL_formtarget = PL_bodytarget;
3957 init_argv_symbols(argc,argv);
3959 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3960 sv_setpv(GvSV(tmpgv),PL_origfilename);
3962 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
3964 bool env_is_not_environ;
3965 GvMULTI_on(PL_envgv);
3966 hv = GvHVn(PL_envgv);
3967 hv_magic(hv, NULL, PERL_MAGIC_env);
3969 #ifdef USE_ENVIRON_ARRAY
3970 /* Note that if the supplied env parameter is actually a copy
3971 of the global environ then it may now point to free'd memory
3972 if the environment has been modified since. To avoid this
3973 problem we treat env==NULL as meaning 'use the default'
3977 env_is_not_environ = env != environ;
3978 if (env_is_not_environ
3979 # ifdef USE_ITHREADS
3980 && PL_curinterp == aTHX
3989 for (; *env; env++) {
3992 if (!(s = strchr(old_var,'=')) || s == old_var)
3995 #if defined(MSDOS) && !defined(DJGPP)
3997 (void)strupr(old_var);
4000 sv = newSVpv(s+1, 0);
4001 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4002 if (env_is_not_environ)
4006 #endif /* USE_ENVIRON_ARRAY */
4007 #endif /* !PERL_MICRO */
4010 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4011 SvREADONLY_off(GvSV(tmpgv));
4012 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4013 SvREADONLY_on(GvSV(tmpgv));
4015 #ifdef THREADS_HAVE_PIDS
4016 PL_ppid = (IV)getppid();
4019 /* touch @F array to prevent spurious warnings 20020415 MJD */
4021 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4026 S_init_perllib(pTHX)
4030 const char *perl5lib = NULL;
4033 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4039 perl5lib = PerlEnv_getenv("PERL5LIB");
4041 * It isn't possible to delete an environment variable with
4042 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4043 * case we treat PERL5LIB as undefined if it has a zero-length value.
4045 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4046 if (perl5lib && *perl5lib != '\0')
4050 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4052 s = PerlEnv_getenv("PERLLIB");
4054 incpush_use_sep(s, 0, 0);
4057 /* Treat PERL5?LIB as a possible search list logical name -- the
4058 * "natural" VMS idiom for a Unix path string. We allow each
4059 * element to be a set of |-separated directories for compatibility.
4063 if (my_trnlnm("PERL5LIB",buf,0))
4065 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4066 } while (my_trnlnm("PERL5LIB",buf,++idx));
4068 while (my_trnlnm("PERLLIB",buf,idx++))
4069 incpush_use_sep(buf, 0, 0);
4074 #ifndef PERL_IS_MINIPERL
4075 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4076 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4078 /* Use the ~-expanded versions of APPLLIB (undocumented),
4079 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4082 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4083 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4087 /* sitearch is always relative to sitelib on Windows for
4088 * DLL-based path intuition to work correctly */
4089 # if !defined(WIN32)
4090 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4091 INCPUSH_CAN_RELOCATE);
4097 /* this picks up sitearch as well */
4098 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4100 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4102 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4106 #ifdef PERL_VENDORARCH_EXP
4107 /* vendorarch is always relative to vendorlib on Windows for
4108 * DLL-based path intuition to work correctly */
4109 # if !defined(WIN32)
4110 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4111 INCPUSH_CAN_RELOCATE);
4115 #ifdef PERL_VENDORLIB_EXP
4117 /* this picks up vendorarch as well */
4118 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4120 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4122 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4123 INCPUSH_CAN_RELOCATE);
4128 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4132 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4136 s = win32_get_privlib(PERL_FS_VERSION, &len);
4138 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4141 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4143 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4147 #ifdef PERL_OTHERLIBDIRS
4148 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4149 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4150 |INCPUSH_CAN_RELOCATE);
4156 * It isn't possible to delete an environment variable with
4157 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4158 * case we treat PERL5LIB as undefined if it has a zero-length value.
4160 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4161 if (perl5lib && *perl5lib != '\0')
4165 incpush_use_sep(perl5lib, 0,
4166 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4168 /* Treat PERL5?LIB as a possible search list logical name -- the
4169 * "natural" VMS idiom for a Unix path string. We allow each
4170 * element to be a set of |-separated directories for compatibility.
4174 if (my_trnlnm("PERL5LIB",buf,0))
4176 incpush_use_sep(buf, 0,
4177 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4178 } while (my_trnlnm("PERL5LIB",buf,++idx));
4182 /* Use the ~-expanded versions of APPLLIB (undocumented),
4183 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4186 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4187 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4190 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4191 /* Search for version-specific dirs below here */
4192 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4193 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4197 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4198 /* Search for version-specific dirs below here */
4199 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4200 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4203 #ifdef PERL_OTHERLIBDIRS
4204 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4205 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4206 |INCPUSH_CAN_RELOCATE);
4208 #endif /* !PERL_IS_MINIPERL */
4211 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4214 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4215 # define PERLLIB_SEP ';'
4218 # define PERLLIB_SEP '|'
4220 # define PERLLIB_SEP ':'
4223 #ifndef PERLLIB_MANGLE
4224 # define PERLLIB_MANGLE(s,n) (s)
4227 /* Push a directory onto @INC if it exists.
4228 Generate a new SV if we do this, to save needing to copy the SV we push
4231 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4236 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4238 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4239 S_ISDIR(tmpstatbuf.st_mode)) {
4241 dir = newSVsv(stem);
4243 /* Truncate dir back to stem. */
4244 SvCUR_set(dir, SvCUR(stem));
4250 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4253 const U8 using_sub_dirs
4254 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4255 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4256 const U8 add_versioned_sub_dirs
4257 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4258 const U8 add_archonly_sub_dirs
4259 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4260 #ifdef PERL_INC_VERSION_LIST
4261 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4263 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4264 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4265 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4266 AV *const inc = GvAVn(PL_incgv);
4268 PERL_ARGS_ASSERT_INCPUSH;
4271 /* Could remove this vestigial extra block, if we don't mind a lot of
4272 re-indenting diff noise. */
4275 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4276 arranged to unshift #! line -I onto the front of @INC. However,
4277 -I can add version and architecture specific libraries, and they
4278 need to go first. The old code assumed that it was always
4279 pushing. Hence to make it work, need to push the architecture
4280 (etc) libraries onto a temporary array, then "unshift" that onto
4281 the front of @INC. */
4282 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4285 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4286 defined to so something (in os2/os2.c), but the code has been
4287 this way, ignoring any possible changed of length, since
4288 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4290 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4292 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4295 /* Do the if() outside the #ifdef to avoid warnings about an unused
4298 #ifdef PERL_RELOCATABLE_INC
4300 * Relocatable include entries are marked with a leading .../
4303 * 0: Remove that leading ".../"
4304 * 1: Remove trailing executable name (anything after the last '/')
4305 * from the perl path to give a perl prefix
4307 * While the @INC element starts "../" and the prefix ends with a real
4308 * directory (ie not . or ..) chop that real directory off the prefix
4309 * and the leading "../" from the @INC element. ie a logical "../"
4311 * Finally concatenate the prefix and the remainder of the @INC element
4312 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4313 * generates /usr/local/lib/perl5
4315 const char *libpath = SvPVX(libdir);
4316 STRLEN libpath_len = SvCUR(libdir);
4317 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4319 SV * const caret_X = get_sv("\030", 0);
4320 /* Going to use the SV just as a scratch buffer holding a C
4326 /* $^X is *the* source of taint if tainting is on, hence
4327 SvPOK() won't be true. */
4329 assert(SvPOKp(caret_X));
4330 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4332 /* Firstly take off the leading .../
4333 If all else fail we'll do the paths relative to the current
4335 sv_chop(libdir, libpath + 4);
4336 /* Don't use SvPV as we're intentionally bypassing taining,
4337 mortal copies that the mg_get of tainting creates, and
4338 corruption that seems to come via the save stack.
4339 I guess that the save stack isn't correctly set up yet. */
4340 libpath = SvPVX(libdir);
4341 libpath_len = SvCUR(libdir);
4343 /* This would work more efficiently with memrchr, but as it's
4344 only a GNU extension we'd need to probe for it and
4345 implement our own. Not hard, but maybe not worth it? */
4347 prefix = SvPVX(prefix_sv);
4348 lastslash = strrchr(prefix, '/');
4350 /* First time in with the *lastslash = '\0' we just wipe off
4351 the trailing /perl from (say) /usr/foo/bin/perl
4355 while ((*lastslash = '\0'), /* Do that, come what may. */
4356 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4357 && (lastslash = strrchr(prefix, '/')))) {
4358 if (lastslash[1] == '\0'
4359 || (lastslash[1] == '.'
4360 && (lastslash[2] == '/' /* ends "/." */
4361 || (lastslash[2] == '/'
4362 && lastslash[3] == '/' /* or "/.." */
4364 /* Prefix ends "/" or "/." or "/..", any of which
4365 are fishy, so don't do any more logical cleanup.
4369 /* Remove leading "../" from path */
4372 /* Next iteration round the loop removes the last
4373 directory name from prefix by writing a '\0' in
4374 the while clause. */
4376 /* prefix has been terminated with a '\0' to the correct
4377 length. libpath points somewhere into the libdir SV.
4378 We need to join the 2 with '/' and drop the result into
4380 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4381 SvREFCNT_dec(libdir);
4382 /* And this is the new libdir. */
4385 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4386 /* Need to taint reloccated paths if running set ID */
4387 SvTAINTED_on(libdir);
4390 SvREFCNT_dec(prefix_sv);
4395 * BEFORE pushing libdir onto @INC we may first push version- and
4396 * archname-specific sub-directories.
4398 if (using_sub_dirs) {
4400 #ifdef PERL_INC_VERSION_LIST
4401 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4402 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4403 const char * const *incver;
4410 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4412 while (unix[len-1] == '/') len--; /* Cosmetic */
4413 sv_usepvn(libdir,unix,len);
4416 PerlIO_printf(Perl_error_log,
4417 "Failed to unixify @INC element \"%s\"\n",
4421 subdir = newSVsv(libdir);
4423 if (add_versioned_sub_dirs) {
4424 /* .../version/archname if -d .../version/archname */
4425 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4426 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4428 /* .../version if -d .../version */
4429 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4430 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4433 #ifdef PERL_INC_VERSION_LIST
4435 for (incver = incverlist; *incver; incver++) {
4436 /* .../xxx if -d .../xxx */
4437 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4438 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4443 if (add_archonly_sub_dirs) {
4444 /* .../archname if -d .../archname */
4445 sv_catpvs(subdir, "/" ARCHNAME);
4446 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4450 assert (SvREFCNT(subdir) == 1);
4451 SvREFCNT_dec(subdir);
4454 /* finally add this lib directory at the end of @INC */
4456 U32 extra = av_len(av) + 1;
4457 av_unshift(inc, extra + push_basedir);
4459 av_store(inc, extra, libdir);
4461 /* av owns a reference, av_store() expects to be donated a
4462 reference, and av expects to be sane when it's cleared.
4463 If I wanted to be naughty and wrong, I could peek inside the
4464 implementation of av_clear(), realise that it uses
4465 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4466 and so directly steal from it (with a memcpy() to inc, and
4467 then memset() to NULL them out. But people copy code from the
4468 core expecting it to be best practise, so let's use the API.
4469 Although studious readers will note that I'm not checking any
4471 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4475 else if (push_basedir) {
4476 av_push(inc, libdir);
4479 if (!push_basedir) {
4480 assert (SvREFCNT(libdir) == 1);
4481 SvREFCNT_dec(libdir);
4487 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4491 /* This logic has been broken out from S_incpush(). It may be possible to
4494 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4501 /* Break at all separators */
4502 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4504 /* skip any consecutive separators */
4506 /* Uncomment the next line for PATH semantics */
4507 /* But you'll need to write tests */
4508 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4510 incpush(p, (STRLEN)(s - p), flags);
4515 incpush(p, (STRLEN)(end - p), flags);
4520 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4524 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4530 PERL_ARGS_ASSERT_CALL_LIST;
4532 while (av_len(paramList) >= 0) {
4533 cv = MUTABLE_CV(av_shift(paramList));
4535 if (paramList == PL_beginav) {
4536 /* save PL_beginav for compiler */
4537 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4539 else if (paramList == PL_checkav) {
4540 /* save PL_checkav for compiler */
4541 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4543 else if (paramList == PL_unitcheckav) {
4544 /* save PL_unitcheckav for compiler */
4545 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4556 PL_madskills |= 16384;
4561 PL_madskills &= ~16384;
4564 (void)SvPV_const(atsv, len);
4566 PL_curcop = &PL_compiling;
4567 CopLINE_set(PL_curcop, oldline);
4568 if (paramList == PL_beginav)
4569 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4571 Perl_sv_catpvf(aTHX_ atsv,
4572 "%s failed--call queue aborted",
4573 paramList == PL_checkav ? "CHECK"
4574 : paramList == PL_initav ? "INIT"
4575 : paramList == PL_unitcheckav ? "UNITCHECK"
4577 while (PL_scopestack_ix > oldscope)
4580 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4587 /* my_exit() was called */
4588 while (PL_scopestack_ix > oldscope)
4591 PL_curstash = PL_defstash;
4592 PL_curcop = &PL_compiling;
4593 CopLINE_set(PL_curcop, oldline);
4599 PL_curcop = &PL_compiling;
4600 CopLINE_set(PL_curcop, oldline);
4603 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4612 Perl_my_exit(pTHX_ U32 status)
4623 STATUS_EXIT_SET(status);
4630 Perl_my_failure_exit(pTHX)
4634 /* We have been called to fall on our sword. The desired exit code
4635 * should be already set in STATUS_UNIX, but could be shifted over
4636 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4639 * If an error code has not been set, then force the issue.
4641 if (MY_POSIX_EXIT) {
4643 /* According to the die_exit.t tests, if errno is non-zero */
4644 /* It should be used for the error status. */
4646 if (errno == EVMSERR) {
4647 STATUS_NATIVE = vaxc$errno;
4650 /* According to die_exit.t tests, if the child_exit code is */
4651 /* also zero, then we need to exit with a code of 255 */
4652 if ((errno != 0) && (errno < 256))
4653 STATUS_UNIX_EXIT_SET(errno);
4654 else if (STATUS_UNIX < 255) {
4655 STATUS_UNIX_EXIT_SET(255);
4660 /* The exit code could have been set by $? or vmsish which
4661 * means that it may not have fatal set. So convert
4662 * success/warning codes to fatal with out changing
4663 * the POSIX status code. The severity makes VMS native
4664 * status handling work, while UNIX mode programs use the
4665 * the POSIX exit codes.
4667 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4668 STATUS_NATIVE &= STS$M_COND_ID;
4669 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4673 /* Traditionally Perl on VMS always expects a Fatal Error. */
4674 if (vaxc$errno & 1) {
4676 /* So force success status to failure */
4677 if (STATUS_NATIVE & 1)
4682 STATUS_UNIX = EINTR; /* In case something cares */
4687 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4689 /* Encode the severity code */
4690 severity = STATUS_NATIVE & STS$M_SEVERITY;
4691 STATUS_UNIX = (severity ? severity : 1) << 8;
4693 /* Perl expects this to be a fatal error */
4694 if (severity != STS$K_SEVERE)
4703 STATUS_UNIX_SET(errno);
4705 exitstatus = STATUS_UNIX >> 8;
4706 if (exitstatus & 255)
4707 STATUS_UNIX_SET(exitstatus);
4709 STATUS_UNIX_SET(255);
4716 S_my_exit_jump(pTHX)
4721 SvREFCNT_dec(PL_e_script);
4725 POPSTACK_TO(PL_mainstack);
4733 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4736 const char * const p = SvPVX_const(PL_e_script);
4737 const char *nl = strchr(p, '\n');
4739 PERL_UNUSED_ARG(idx);
4740 PERL_UNUSED_ARG(maxlen);
4742 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4744 filter_del(read_e_script);
4747 sv_catpvn(buf_sv, p, nl-p);
4748 sv_chop(PL_e_script, nl);
4754 * c-indentation-style: bsd
4756 * indent-tabs-mode: t
4759 * ex: set ts=8 sts=4 sw=4 noet: