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;
1119 SvREFCNT_dec(PL_strtab);
1122 /* free the pointer tables used for cloning */
1123 ptr_table_free(PL_ptr_table);
1124 PL_ptr_table = (PTR_TBL_t*)NULL;
1127 /* free special SVs */
1129 SvREFCNT(&PL_sv_yes) = 0;
1130 sv_clear(&PL_sv_yes);
1131 SvANY(&PL_sv_yes) = NULL;
1132 SvFLAGS(&PL_sv_yes) = 0;
1134 SvREFCNT(&PL_sv_no) = 0;
1135 sv_clear(&PL_sv_no);
1136 SvANY(&PL_sv_no) = NULL;
1137 SvFLAGS(&PL_sv_no) = 0;
1141 for (i=0; i<=2; i++) {
1142 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1143 sv_clear(PERL_DEBUG_PAD(i));
1144 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1145 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1149 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1150 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1152 #ifdef DEBUG_LEAKING_SCALARS
1153 if (PL_sv_count != 0) {
1158 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1159 svend = &sva[SvREFCNT(sva)];
1160 for (sv = sva + 1; sv < svend; ++sv) {
1161 if (SvTYPE(sv) != SVTYPEMASK) {
1162 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1164 " refcnt=%"UVuf pTHX__FORMAT "\n"
1165 "\tallocated at %s:%d %s %s%s; serial %"UVuf"\n",
1166 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1168 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1170 sv->sv_debug_inpad ? "for" : "by",
1171 sv->sv_debug_optype ?
1172 PL_op_name[sv->sv_debug_optype]: "(none)",
1173 sv->sv_debug_cloned ? " (cloned)" : "",
1176 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1177 Perl_dump_sv_child(aTHX_ sv);
1183 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1187 /* Wait for up to 4 seconds for child to terminate.
1188 This seems to be the least effort way of timing out on reaping
1190 struct timeval waitfor = {4, 0};
1191 int sock = PL_dumper_fd;
1195 FD_SET(sock, &rset);
1196 select(sock + 1, &rset, NULL, NULL, &waitfor);
1197 waitpid(child, &status, WNOHANG);
1202 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1208 #ifdef PERL_DEBUG_READONLY_OPS
1214 #if defined(PERLIO_LAYERS)
1215 /* No more IO - including error messages ! */
1216 PerlIO_cleanup(aTHX);
1219 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1220 as currently layers use it rather than NULL as a marker
1221 for no arg - and will try and SvREFCNT_dec it.
1223 SvREFCNT(&PL_sv_undef) = 0;
1224 SvREADONLY_off(&PL_sv_undef);
1226 Safefree(PL_origfilename);
1227 PL_origfilename = NULL;
1228 Safefree(PL_reg_start_tmp);
1229 PL_reg_start_tmp = (char**)NULL;
1230 PL_reg_start_tmpl = 0;
1231 Safefree(PL_reg_curpm);
1232 Safefree(PL_reg_poscache);
1233 free_tied_hv_pool();
1234 Safefree(PL_op_mask);
1235 Safefree(PL_psig_name);
1236 PL_psig_name = (SV**)NULL;
1237 PL_psig_ptr = (SV**)NULL;
1238 Safefree(PL_psig_pend);
1239 PL_psig_pend = (int*)NULL;
1241 /* We need to NULL PL_psig_pend first, so that
1242 signal handlers know not to use it */
1243 int *psig_save = PL_psig_pend;
1244 PL_psig_pend = (int*)NULL;
1245 Safefree(psig_save);
1249 PL_tainting = FALSE;
1250 PL_taint_warn = FALSE;
1251 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1254 DEBUG_P(debprofdump());
1256 #ifdef USE_REENTRANT_API
1257 Perl_reentrant_free(aTHX);
1262 while (PL_regmatch_slab) {
1263 regmatch_slab *s = PL_regmatch_slab;
1264 PL_regmatch_slab = PL_regmatch_slab->next;
1268 /* As the absolutely last thing, free the non-arena SV for mess() */
1271 /* we know that type == SVt_PVMG */
1273 /* it could have accumulated taint magic */
1276 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1277 moremagic = mg->mg_moremagic;
1278 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1280 Safefree(mg->mg_ptr);
1284 /* we know that type >= SVt_PV */
1285 SvPV_free(PL_mess_sv);
1286 Safefree(SvANY(PL_mess_sv));
1287 Safefree(PL_mess_sv);
1294 =for apidoc perl_free
1296 Releases a Perl interpreter. See L<perlembed>.
1306 PERL_ARGS_ASSERT_PERL_FREE;
1308 if (PL_veto_cleanup)
1311 #ifdef PERL_TRACK_MEMPOOL
1314 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1315 * value as we're probably hunting memory leaks then
1317 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1318 if (!s || atoi(s) == 0) {
1319 const U32 old_debug = PL_debug;
1320 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1321 thread at thread exit. */
1323 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1324 "free this thread's memory\n");
1325 PL_debug &= ~ DEBUG_m_FLAG;
1327 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1328 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1329 PL_debug = old_debug;
1334 #if defined(WIN32) || defined(NETWARE)
1335 # if defined(PERL_IMPLICIT_SYS)
1338 void *host = nw_internal_host;
1340 void *host = w32_internal_host;
1342 PerlMem_free(aTHXx);
1344 nw_delete_internal_host(host);
1346 win32_delete_internal_host(host);
1350 PerlMem_free(aTHXx);
1353 PerlMem_free(aTHXx);
1357 #if defined(USE_ITHREADS)
1358 /* provide destructors to clean up the thread key when libperl is unloaded */
1359 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1361 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1362 #pragma fini "perl_fini"
1363 #elif defined(__sun) && !defined(__GNUC__)
1364 #pragma fini (perl_fini)
1368 #if defined(__GNUC__)
1369 __attribute__((destructor))
1374 if (PL_curinterp && !PL_veto_cleanup)
1379 #endif /* THREADS */
1382 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1385 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1386 PL_exitlist[PL_exitlistlen].fn = fn;
1387 PL_exitlist[PL_exitlistlen].ptr = ptr;
1391 #ifdef HAS_PROCSELFEXE
1392 /* This is a function so that we don't hold on to MAXPATHLEN
1393 bytes of stack longer than necessary
1396 S_procself_val(pTHX_ SV *sv, const char *arg0)
1398 char buf[MAXPATHLEN];
1399 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1401 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1402 includes a spurious NUL which will cause $^X to fail in system
1403 or backticks (this will prevent extensions from being built and
1404 many tests from working). readlink is not meant to add a NUL.
1405 Normal readlink works fine.
1407 if (len > 0 && buf[len-1] == '\0') {
1411 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1412 returning the text "unknown" from the readlink rather than the path
1413 to the executable (or returning an error from the readlink). Any valid
1414 path has a '/' in it somewhere, so use that to validate the result.
1415 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1417 if (len > 0 && memchr(buf, '/', len)) {
1418 sv_setpvn(sv,buf,len);
1424 #endif /* HAS_PROCSELFEXE */
1427 S_set_caret_X(pTHX) {
1429 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1431 #ifdef HAS_PROCSELFEXE
1432 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1435 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1437 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1444 =for apidoc perl_parse
1446 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1452 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1459 PERL_ARGS_ASSERT_PERL_PARSE;
1460 #ifndef MULTIPLICITY
1461 PERL_UNUSED_ARG(my_perl);
1464 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1465 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1466 * This MUST be done before any hash stores or fetches take place.
1467 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1468 * yourself, it is your responsibility to provide a good random seed!
1469 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1470 if (!PL_rehash_seed_set)
1471 PL_rehash_seed = get_hash_seed();
1473 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1475 if (s && (atoi(s) == 1))
1476 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1478 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1483 if (PL_origalen != 0) {
1484 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1487 /* Set PL_origalen be the sum of the contiguous argv[]
1488 * elements plus the size of the env in case that it is
1489 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1490 * as the maximum modifiable length of $0. In the worst case
1491 * the area we are able to modify is limited to the size of
1492 * the original argv[0]. (See below for 'contiguous', though.)
1494 const char *s = NULL;
1497 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1498 /* Do the mask check only if the args seem like aligned. */
1500 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1502 /* See if all the arguments are contiguous in memory. Note
1503 * that 'contiguous' is a loose term because some platforms
1504 * align the argv[] and the envp[]. If the arguments look
1505 * like non-aligned, assume that they are 'strictly' or
1506 * 'traditionally' contiguous. If the arguments look like
1507 * aligned, we just check that they are within aligned
1508 * PTRSIZE bytes. As long as no system has something bizarre
1509 * like the argv[] interleaved with some other data, we are
1510 * fine. (Did I just evoke Murphy's Law?) --jhi */
1511 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1513 for (i = 1; i < PL_origargc; i++) {
1514 if ((PL_origargv[i] == s + 1
1516 || PL_origargv[i] == s + 2
1521 (PL_origargv[i] > s &&
1523 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1534 #ifndef PERL_USE_SAFE_PUTENV
1535 /* Can we grab env area too to be used as the area for $0? */
1536 if (s && PL_origenviron && !PL_use_safe_putenv) {
1537 if ((PL_origenviron[0] == s + 1)
1540 (PL_origenviron[0] > s &&
1541 PL_origenviron[0] <=
1542 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1545 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1546 s = PL_origenviron[0];
1549 my_setenv("NoNe SuCh", NULL);
1550 /* Force copy of environment. */
1551 for (i = 1; PL_origenviron[i]; i++) {
1552 if (PL_origenviron[i] == s + 1
1555 (PL_origenviron[i] > s &&
1556 PL_origenviron[i] <=
1557 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1560 s = PL_origenviron[i];
1568 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1570 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1575 /* Come here if running an undumped a.out. */
1577 PL_origfilename = savepv(argv[0]);
1578 PL_do_undump = FALSE;
1579 cxstack_ix = -1; /* start label stack again */
1581 assert (!PL_tainted);
1583 S_set_caret_X(aTHX);
1585 init_postdump_symbols(argc,argv,env);
1590 op_free(PL_main_root);
1591 PL_main_root = NULL;
1593 PL_main_start = NULL;
1594 SvREFCNT_dec(PL_main_cv);
1598 oldscope = PL_scopestack_ix;
1599 PL_dowarn = G_WARN_OFF;
1604 parse_body(env,xsinit);
1606 call_list(oldscope, PL_unitcheckav);
1608 call_list(oldscope, PL_checkav);
1615 /* my_exit() was called */
1616 while (PL_scopestack_ix > oldscope)
1619 PL_curstash = PL_defstash;
1621 call_list(oldscope, PL_unitcheckav);
1623 call_list(oldscope, PL_checkav);
1627 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1635 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1636 miniperl, and we need to see those flags reflected in the values here. */
1638 /* What this returns is subject to change. Use the public interface in Config.
1641 S_Internals_V(pTHX_ CV *cv)
1644 #ifdef LOCAL_PATCH_COUNT
1645 const int local_patch_count = LOCAL_PATCH_COUNT;
1647 const int local_patch_count = 0;
1649 const int entries = 3 + local_patch_count;
1651 static char non_bincompat_options[] =
1658 # ifdef PERL_DISABLE_PMC
1661 # ifdef PERL_DONT_CREATE_GVSV
1662 " PERL_DONT_CREATE_GVSV"
1664 # ifdef PERL_IS_MINIPERL
1667 # ifdef PERL_MALLOC_WRAP
1670 # ifdef PERL_MEM_LOG
1673 # ifdef PERL_MEM_LOG_NOIMPL
1674 " PERL_MEM_LOG_NOIMPL"
1676 # ifdef PERL_USE_DEVEL
1679 # ifdef PERL_USE_SAFE_PUTENV
1680 " PERL_USE_SAFE_PUTENV"
1682 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1683 " USE_ATTRIBUTES_FOR_PERLIO"
1685 # ifdef USE_FAST_STDIO
1688 # ifdef USE_PERL_ATOF
1691 # ifdef USE_SITECUSTOMIZE
1692 " USE_SITECUSTOMIZE"
1695 PERL_UNUSED_ARG(cv);
1696 PERL_UNUSED_ARG(items);
1698 EXTEND(SP, entries);
1700 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1701 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1702 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1706 PUSHs(Perl_newSVpvn_flags(aTHX_
1707 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1710 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1714 PUSHs(&PL_sv_undef);
1717 for (i = 1; i <= local_patch_count; i++) {
1718 /* This will be an undef, if PL_localpatches[i] is NULL. */
1719 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1725 #define INCPUSH_UNSHIFT 0x01
1726 #define INCPUSH_ADD_OLD_VERS 0x02
1727 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1728 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1729 #define INCPUSH_NOT_BASEDIR 0x10
1730 #define INCPUSH_CAN_RELOCATE 0x20
1731 #define INCPUSH_ADD_SUB_DIRS \
1732 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1735 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1739 int argc = PL_origargc;
1740 char **argv = PL_origargv;
1741 const char *scriptname = NULL;
1742 VOL bool dosearch = FALSE;
1744 const char *cddir = NULL;
1745 #ifdef USE_SITECUSTOMIZE
1746 bool minus_f = FALSE;
1748 SV *linestr_sv = newSV_type(SVt_PVIV);
1749 bool add_read_e_script = FALSE;
1751 SvGROW(linestr_sv, 80);
1752 sv_setpvs(linestr_sv,"");
1758 for (argc--,argv++; argc > 0; argc--,argv++) {
1759 if (argv[0][0] != '-' || !argv[0][1])
1765 #ifndef PERL_STRICT_CR
1789 if ((s = moreswitches(s)))
1794 CHECK_MALLOC_TOO_LATE_FOR('t');
1795 if( !PL_tainting ) {
1796 PL_taint_warn = TRUE;
1802 CHECK_MALLOC_TOO_LATE_FOR('T');
1804 PL_taint_warn = FALSE;
1812 forbid_setid('e', FALSE);
1814 PL_e_script = newSVpvs("");
1815 add_read_e_script = TRUE;
1818 sv_catpv(PL_e_script, s);
1820 sv_catpv(PL_e_script, argv[1]);
1824 Perl_croak(aTHX_ "No code specified for -%c", c);
1825 sv_catpvs(PL_e_script, "\n");
1829 #ifdef USE_SITECUSTOMIZE
1835 case 'I': /* -I handled both here and in moreswitches() */
1836 forbid_setid('I', FALSE);
1837 if (!*++s && (s=argv[1]) != NULL) {
1841 STRLEN len = strlen(s);
1842 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1845 Perl_croak(aTHX_ "No directory specified for -I");
1848 forbid_setid('S', FALSE);
1857 opts_prog = newSVpvs("use Config; Config::_V()");
1861 opts_prog = Perl_newSVpvf(aTHX_
1862 "use Config; Config::config_vars(qw%c%s%c)",
1866 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1867 /* don't look for script or read stdin */
1868 scriptname = BIT_BUCKET;
1872 PL_doextract = TRUE;
1880 if (!*++s || isSPACE(*s)) {
1884 /* catch use of gnu style long options */
1885 if (strEQ(s, "version")) {
1889 if (strEQ(s, "help")) {
1896 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1907 #ifndef SECURE_INTERNAL_GETENV
1910 (s = PerlEnv_getenv("PERL5OPT")))
1914 if (*s == '-' && *(s+1) == 'T') {
1915 CHECK_MALLOC_TOO_LATE_FOR('T');
1917 PL_taint_warn = FALSE;
1920 char *popt_copy = NULL;
1933 if (!strchr("CDIMUdmtwW", *s))
1934 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1938 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1939 s = popt_copy + (s - d);
1947 if( !PL_tainting ) {
1948 PL_taint_warn = TRUE;
1959 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1961 /* SITELIB_EXP is a function call on Win32.
1962 The games with local $! are to avoid setting errno if there is no
1963 sitecustomize script. */
1964 const char *const sitelib = SITELIB_EXP;
1965 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1967 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1972 scriptname = argv[0];
1975 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1977 else if (scriptname == NULL) {
1979 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1985 /* Set $^X early so that it can be used for relocatable paths in @INC */
1986 assert (!PL_tainted);
1988 S_set_caret_X(aTHX);
1993 bool suidscript = FALSE;
1995 open_script(scriptname, dosearch, &suidscript, &rsfp);
1997 validate_suid(validarg, scriptname, fdscript, suidscript,
2001 # if defined(SIGCHLD) || defined(SIGCLD)
2004 # define SIGCHLD SIGCLD
2006 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2007 if (sigstate == (Sighandler_t) SIG_IGN) {
2008 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2009 "Can't ignore signal CHLD, forcing to default");
2010 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2018 /* This will croak if suidscript is true, as -x cannot be used with
2020 forbid_setid('x', suidscript);
2021 /* Hence you can't get here if suidscript is true */
2023 find_beginning(linestr_sv, rsfp);
2024 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2025 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2029 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2030 CvUNIQUE_on(PL_compcv);
2032 CvPADLIST(PL_compcv) = pad_new(0);
2034 PL_isarev = newHV();
2037 boot_core_UNIVERSAL();
2039 newXS("Internals::V", S_Internals_V, __FILE__);
2042 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2044 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2050 # ifdef HAS_SOCKS5_INIT
2051 socks5_init(argv[0]);
2057 init_predump_symbols();
2058 /* init_postdump_symbols not currently designed to be called */
2059 /* more than once (ENV isn't cleared first, for example) */
2060 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2062 init_postdump_symbols(argc,argv,env);
2064 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2065 * or explicitly in some platforms.
2066 * locale.c:Perl_init_i18nl10n() if the environment
2067 * look like the user wants to use UTF-8. */
2068 #if defined(__SYMBIAN32__)
2069 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2071 # ifndef PERL_IS_MINIPERL
2073 /* Requires init_predump_symbols(). */
2074 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2079 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2080 * and the default open disciplines. */
2081 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2082 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2084 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2085 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2086 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2088 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2089 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2090 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2092 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2093 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2094 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2096 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2097 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2100 sv_setpvs(sv, ":utf8\0:utf8");
2102 sv_setpvs(sv, ":utf8\0");
2105 sv_setpvs(sv, "\0:utf8");
2114 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2115 if (strEQ(s, "unsafe"))
2116 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2117 else if (strEQ(s, "safe"))
2118 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2120 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2127 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2131 PL_xmlfp = PerlIO_stdout();
2133 PL_xmlfp = PerlIO_open(s, "w");
2135 Perl_croak(aTHX_ "Can't open %s", s);
2137 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2143 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2144 PL_madskills = atoi(s);
2145 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2150 lex_start(linestr_sv, rsfp, TRUE);
2151 PL_subname = newSVpvs("main");
2153 if (add_read_e_script)
2154 filter_add(read_e_script, NULL);
2156 /* now parse the script */
2158 SETERRNO(0,SS_NORMAL);
2159 if (yyparse() || PL_parser->error_count) {
2161 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2163 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2167 CopLINE_set(PL_curcop, 0);
2168 PL_curstash = PL_defstash;
2170 SvREFCNT_dec(PL_e_script);
2178 SAVECOPFILE(PL_curcop);
2179 SAVECOPLINE(PL_curcop);
2180 gv_check(PL_defstash);
2189 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2190 dump_mstats("after compilation:");
2195 PL_restartjmpenv = NULL;
2201 =for apidoc perl_run
2203 Tells a Perl interpreter to run. See L<perlembed>.
2216 PERL_ARGS_ASSERT_PERL_RUN;
2217 #ifndef MULTIPLICITY
2218 PERL_UNUSED_ARG(my_perl);
2221 oldscope = PL_scopestack_ix;
2229 cxstack_ix = -1; /* start context stack again */
2231 case 0: /* normal completion */
2235 case 2: /* my_exit() */
2236 while (PL_scopestack_ix > oldscope)
2239 PL_curstash = PL_defstash;
2240 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2241 PL_endav && !PL_minus_c)
2242 call_list(oldscope, PL_endav);
2244 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2245 dump_mstats("after execution: ");
2251 POPSTACK_TO(PL_mainstack);
2254 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2265 S_run_body(pTHX_ I32 oldscope)
2268 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2269 PL_sawampersand ? "Enabling" : "Omitting"));
2271 if (!PL_restartop) {
2275 exit(0); /* less likely to core dump than my_exit(0) */
2279 if (DEBUG_x_TEST || DEBUG_B_TEST)
2280 dump_all_perl(!DEBUG_B_TEST);
2282 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2286 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2289 if (PERLDB_SINGLE && PL_DBsingle)
2290 sv_setiv(PL_DBsingle, 1);
2292 call_list(oldscope, PL_initav);
2293 #ifdef PERL_DEBUG_READONLY_OPS
2294 Perl_pending_Slabs_to_ro(aTHX);
2301 PL_restartjmpenv = NULL;
2302 PL_op = PL_restartop;
2306 else if (PL_main_start) {
2307 CvDEPTH(PL_main_cv) = 1;
2308 PL_op = PL_main_start;
2316 =head1 SV Manipulation Functions
2318 =for apidoc p||get_sv
2320 Returns the SV of the specified Perl scalar. C<flags> are passed to
2321 C<gv_fetchpv>. If C<GV_ADD> is set and the
2322 Perl variable does not exist then it will be created. If C<flags> is zero
2323 and the variable does not exist then NULL is returned.
2329 Perl_get_sv(pTHX_ const char *name, I32 flags)
2333 PERL_ARGS_ASSERT_GET_SV;
2335 gv = gv_fetchpv(name, flags, SVt_PV);
2342 =head1 Array Manipulation Functions
2344 =for apidoc p||get_av
2346 Returns the AV of the specified Perl array. C<flags> are passed to
2347 C<gv_fetchpv>. If C<GV_ADD> is set and the
2348 Perl variable does not exist then it will be created. If C<flags> is zero
2349 and the variable does not exist then NULL is returned.
2355 Perl_get_av(pTHX_ const char *name, I32 flags)
2357 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2359 PERL_ARGS_ASSERT_GET_AV;
2369 =head1 Hash Manipulation Functions
2371 =for apidoc p||get_hv
2373 Returns the HV of the specified Perl hash. C<flags> are passed to
2374 C<gv_fetchpv>. If C<GV_ADD> is set and the
2375 Perl variable does not exist then it will be created. If C<flags> is zero
2376 and the variable does not exist then NULL is returned.
2382 Perl_get_hv(pTHX_ const char *name, I32 flags)
2384 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2386 PERL_ARGS_ASSERT_GET_HV;
2396 =head1 CV Manipulation Functions
2398 =for apidoc p||get_cvn_flags
2400 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2401 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2402 exist then it will be declared (which has the same effect as saying
2403 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2404 then NULL is returned.
2406 =for apidoc p||get_cv
2408 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2414 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2416 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2417 /* XXX this is probably not what they think they're getting.
2418 * It has the same effect as "sub name;", i.e. just a forward
2421 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2423 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2424 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2425 return newSUB(start_subparse(FALSE, 0),
2426 newSVOP(OP_CONST, 0, sv),
2434 /* Nothing in core calls this now, but we can't replace it with a macro and
2435 move it to mathoms.c as a macro would evaluate name twice. */
2437 Perl_get_cv(pTHX_ const char *name, I32 flags)
2439 PERL_ARGS_ASSERT_GET_CV;
2441 return get_cvn_flags(name, strlen(name), flags);
2444 /* Be sure to refetch the stack pointer after calling these routines. */
2448 =head1 Callback Functions
2450 =for apidoc p||call_argv
2452 Performs a callback to the specified Perl sub. See L<perlcall>.
2458 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2460 /* See G_* flags in cop.h */
2461 /* null terminated arg list */
2466 PERL_ARGS_ASSERT_CALL_ARGV;
2471 mXPUSHs(newSVpv(*argv,0));
2476 return call_pv(sub_name, flags);
2480 =for apidoc p||call_pv
2482 Performs a callback to the specified Perl sub. See L<perlcall>.
2488 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2489 /* name of the subroutine */
2490 /* See G_* flags in cop.h */
2492 PERL_ARGS_ASSERT_CALL_PV;
2494 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2498 =for apidoc p||call_method
2500 Performs a callback to the specified Perl method. The blessed object must
2501 be on the stack. See L<perlcall>.
2507 Perl_call_method(pTHX_ const char *methname, I32 flags)
2508 /* name of the subroutine */
2509 /* See G_* flags in cop.h */
2512 PERL_ARGS_ASSERT_CALL_METHOD;
2514 len = strlen(methname);
2516 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2517 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2520 /* May be called with any of a CV, a GV, or an SV containing the name. */
2522 =for apidoc p||call_sv
2524 Performs a callback to the Perl sub whose name is in the SV. See
2531 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2532 /* See G_* flags in cop.h */
2535 LOGOP myop; /* fake syntax tree node */
2540 bool oldcatch = CATCH_GET;
2542 OP* const oldop = PL_op;
2545 PERL_ARGS_ASSERT_CALL_SV;
2547 if (flags & G_DISCARD) {
2551 if (!(flags & G_WANT)) {
2552 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2557 Zero(&myop, 1, LOGOP);
2558 myop.op_next = NULL;
2559 if (!(flags & G_NOARGS))
2560 myop.op_flags |= OPf_STACKED;
2561 myop.op_flags |= OP_GIMME_REVERSE(flags);
2565 EXTEND(PL_stack_sp, 1);
2566 *++PL_stack_sp = sv;
2568 oldscope = PL_scopestack_ix;
2570 if (PERLDB_SUB && PL_curstash != PL_debstash
2571 /* Handle first BEGIN of -d. */
2572 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2573 /* Try harder, since this may have been a sighandler, thus
2574 * curstash may be meaningless. */
2575 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2576 && !(flags & G_NODEBUG))
2577 PL_op->op_private |= OPpENTERSUB_DB;
2579 if (flags & G_METHOD) {
2580 Zero(&method_op, 1, UNOP);
2581 method_op.op_next = PL_op;
2582 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2583 method_op.op_type = OP_METHOD;
2584 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2585 myop.op_type = OP_ENTERSUB;
2586 PL_op = (OP*)&method_op;
2589 if (!(flags & G_EVAL)) {
2591 CALL_BODY_SUB((OP*)&myop);
2592 retval = PL_stack_sp - (PL_stack_base + oldmark);
2593 CATCH_SET(oldcatch);
2596 myop.op_other = (OP*)&myop;
2598 create_eval_scope(flags|G_FAKINGEVAL);
2606 CALL_BODY_SUB((OP*)&myop);
2607 retval = PL_stack_sp - (PL_stack_base + oldmark);
2608 if (!(flags & G_KEEPERR)) {
2616 /* my_exit() was called */
2617 PL_curstash = PL_defstash;
2624 PL_restartjmpenv = NULL;
2625 PL_op = PL_restartop;
2629 PL_stack_sp = PL_stack_base + oldmark;
2630 if ((flags & G_WANT) == G_ARRAY)
2634 *++PL_stack_sp = &PL_sv_undef;
2639 if (PL_scopestack_ix > oldscope)
2640 delete_eval_scope();
2644 if (flags & G_DISCARD) {
2645 PL_stack_sp = PL_stack_base + oldmark;
2654 /* Eval a string. The G_EVAL flag is always assumed. */
2657 =for apidoc p||eval_sv
2659 Tells Perl to C<eval> the string in the SV.
2665 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2667 /* See G_* flags in cop.h */
2671 UNOP myop; /* fake syntax tree node */
2672 VOL I32 oldmark = SP - PL_stack_base;
2675 OP* const oldop = PL_op;
2678 PERL_ARGS_ASSERT_EVAL_SV;
2680 if (flags & G_DISCARD) {
2687 Zero(PL_op, 1, UNOP);
2688 EXTEND(PL_stack_sp, 1);
2689 *++PL_stack_sp = sv;
2691 if (!(flags & G_NOARGS))
2692 myop.op_flags = OPf_STACKED;
2693 myop.op_next = NULL;
2694 myop.op_type = OP_ENTEREVAL;
2695 myop.op_flags |= OP_GIMME_REVERSE(flags);
2696 if (flags & G_KEEPERR)
2697 myop.op_flags |= OPf_SPECIAL;
2699 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2700 * before a PUSHEVAL, which corrupts the stack after a croak */
2701 TAINT_PROPER("eval_sv()");
2707 CALL_BODY_EVAL((OP*)&myop);
2708 retval = PL_stack_sp - (PL_stack_base + oldmark);
2709 if (!(flags & G_KEEPERR)) {
2717 /* my_exit() was called */
2718 PL_curstash = PL_defstash;
2725 PL_restartjmpenv = NULL;
2726 PL_op = PL_restartop;
2730 PL_stack_sp = PL_stack_base + oldmark;
2731 if ((flags & G_WANT) == G_ARRAY)
2735 *++PL_stack_sp = &PL_sv_undef;
2741 if (flags & G_DISCARD) {
2742 PL_stack_sp = PL_stack_base + oldmark;
2752 =for apidoc p||eval_pv
2754 Tells Perl to C<eval> the given string and return an SV* result.
2760 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2764 SV* sv = newSVpv(p, 0);
2766 PERL_ARGS_ASSERT_EVAL_PV;
2768 eval_sv(sv, G_SCALAR);
2775 if (croak_on_error && SvTRUE(ERRSV)) {
2776 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2782 /* Require a module. */
2785 =head1 Embedding Functions
2787 =for apidoc p||require_pv
2789 Tells Perl to C<require> the file named by the string argument. It is
2790 analogous to the Perl code C<eval "require '$file'">. It's even
2791 implemented that way; consider using load_module instead.
2796 Perl_require_pv(pTHX_ const char *pv)
2802 PERL_ARGS_ASSERT_REQUIRE_PV;
2804 PUSHSTACKi(PERLSI_REQUIRE);
2806 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2807 eval_sv(sv_2mortal(sv), G_DISCARD);
2813 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2815 /* This message really ought to be max 23 lines.
2816 * Removed -h because the user already knows that option. Others? */
2818 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2819 minimum of 509 character string literals. */
2820 static const char * const usage_msg[] = {
2821 " -0[octal] specify record separator (\\0, if no argument)\n"
2822 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2823 " -C[number/list] enables the listed Unicode features\n"
2824 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2825 " -d[:debugger] run program under debugger\n"
2826 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2827 " -e program one line of program (several -e's allowed, omit programfile)\n"
2828 " -E program like -e, but enables all optional features\n"
2829 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2830 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2831 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2832 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2833 " -l[octal] enable line ending processing, specifies line terminator\n"
2834 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2835 " -n assume \"while (<>) { ... }\" loop around program\n"
2836 " -p assume loop like -n but print line also, like sed\n"
2837 " -s enable rudimentary parsing for switches after programfile\n"
2838 " -S look for programfile using PATH environment variable\n",
2839 " -t enable tainting warnings\n"
2840 " -T enable tainting checks\n"
2841 " -u dump core after parsing program\n"
2842 " -U allow unsafe operations\n"
2843 " -v print version, patchlevel and license\n"
2844 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2845 " -w enable many useful warnings\n"
2846 " -W enable all warnings\n"
2847 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2848 " -X disable all warnings\n"
2850 "Run 'perldoc perl' for more help with Perl.\n\n",
2853 const char * const *p = usage_msg;
2854 PerlIO *out = PerlIO_stdout();
2856 PERL_ARGS_ASSERT_USAGE;
2859 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2862 PerlIO_puts(out, *p++);
2865 /* convert a string of -D options (or digits) into an int.
2866 * sets *s to point to the char after the options */
2870 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2872 static const char * const usage_msgd[] = {
2873 " Debugging flag values: (see also -d)\n"
2874 " p Tokenizing and parsing (with v, displays parse stack)\n"
2875 " s Stack snapshots (with v, displays all stacks)\n"
2876 " l Context (loop) stack processing\n"
2877 " t Trace execution\n"
2878 " o Method and overloading resolution\n",
2879 " c String/numeric conversions\n"
2880 " P Print profiling info, source file input state\n"
2881 " m Memory and SV allocation\n"
2882 " f Format processing\n"
2883 " r Regular expression parsing and execution\n"
2884 " x Syntax tree dump\n",
2885 " u Tainting checks\n"
2886 " H Hash dump -- usurps values()\n"
2887 " X Scratchpad allocation\n"
2890 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2891 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2892 " v Verbose: use in conjunction with other flags\n"
2893 " C Copy On Write\n"
2894 " A Consistency checks on internal structures\n"
2895 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2896 " M trace smart match resolution\n"
2897 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2902 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2905 /* if adding extra options, remember to update DEBUG_MASK */
2906 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2908 for (; isALNUM(**s); (*s)++) {
2909 const char * const d = strchr(debopts,**s);
2911 i |= 1 << (d - debopts);
2912 else if (ckWARN_d(WARN_DEBUGGING))
2913 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2914 "invalid option -D%c, use -D'' to see choices\n", **s);
2917 else if (isDIGIT(**s)) {
2919 for (; isALNUM(**s); (*s)++) ;
2921 else if (givehelp) {
2922 const char *const *p = usage_msgd;
2923 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2926 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2927 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2928 "-Dp not implemented on this platform\n");
2934 /* This routine handles any switches that can be given during run */
2937 Perl_moreswitches(pTHX_ const char *s)
2941 const char option = *s; /* used to remember option in -m/-M code */
2943 PERL_ARGS_ASSERT_MORESWITCHES;
2951 SvREFCNT_dec(PL_rs);
2952 if (s[1] == 'x' && s[2]) {
2953 const char *e = s+=2;
2959 flags = PERL_SCAN_SILENT_ILLDIGIT;
2960 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2961 if (s + numlen < e) {
2962 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2966 PL_rs = newSVpvs("");
2967 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2968 tmps = (U8*)SvPVX(PL_rs);
2969 uvchr_to_utf8(tmps, rschar);
2970 SvCUR_set(PL_rs, UNISKIP(rschar));
2975 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2976 if (rschar & ~((U8)~0))
2977 PL_rs = &PL_sv_undef;
2978 else if (!rschar && numlen >= 2)
2979 PL_rs = newSVpvs("");
2981 char ch = (char)rschar;
2982 PL_rs = newSVpvn(&ch, 1);
2985 sv_setsv(get_sv("/", GV_ADD), PL_rs);
2990 PL_unicode = parse_unicode_opts( (const char **)&s );
2991 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2997 while (*s && !isSPACE(*s)) ++s;
2998 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3009 forbid_setid('d', FALSE);
3012 /* -dt indicates to the debugger that threads will be used */
3013 if (*s == 't' && !isALNUM(s[1])) {
3015 my_setenv("PERL5DB_THREADED", "1");
3018 /* The following permits -d:Mod to accepts arguments following an =
3019 in the fashion that -MSome::Mod does. */
3020 if (*s == ':' || *s == '=') {
3021 const char *start = ++s;
3022 const char *const end = s + strlen(s);
3023 SV * const sv = newSVpvs("use Devel::");
3025 /* We now allow -d:Module=Foo,Bar */
3026 while(isALNUM(*s) || *s==':') ++s;
3028 sv_catpvn(sv, start, end - start);
3030 sv_catpvn(sv, start, s-start);
3031 /* Don't use NUL as q// delimiter here, this string goes in the
3033 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3036 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3040 PL_perldb = PERLDB_ALL;
3047 forbid_setid('D', FALSE);
3049 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3050 #else /* !DEBUGGING */
3051 if (ckWARN_d(WARN_DEBUGGING))
3052 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3053 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3054 for (s++; isALNUM(*s); s++) ;
3059 usage(PL_origargv[0]);
3062 Safefree(PL_inplace);
3063 #if defined(__CYGWIN__) /* do backup extension automagically */
3064 if (*(s+1) == '\0') {
3065 PL_inplace = savepvs(".bak");
3068 #endif /* __CYGWIN__ */
3070 const char * const start = ++s;
3071 while (*s && !isSPACE(*s))
3074 PL_inplace = savepvn(start, s - start);
3078 if (*s == '-') /* Additional switches on #! line. */
3082 case 'I': /* -I handled both here and in parse_body() */
3083 forbid_setid('I', FALSE);
3085 while (*s && isSPACE(*s))
3090 /* ignore trailing spaces (possibly followed by other switches) */
3092 for (e = p; *e && !isSPACE(*e); e++) ;
3096 } while (*p && *p != '-');
3098 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3104 Perl_croak(aTHX_ "No directory specified for -I");
3110 SvREFCNT_dec(PL_ors_sv);
3116 PL_ors_sv = newSVpvs("\n");
3117 numlen = 3 + (*s == '0');
3118 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3122 if (RsPARA(PL_rs)) {
3123 PL_ors_sv = newSVpvs("\n\n");
3126 PL_ors_sv = newSVsv(PL_rs);
3131 forbid_setid('M', FALSE); /* XXX ? */
3134 forbid_setid('m', FALSE); /* XXX ? */
3139 const char *use = "use ";
3141 /* -M-foo == 'no foo' */
3142 /* Leading space on " no " is deliberate, to make both
3143 possibilities the same length. */
3144 if (*s == '-') { use = " no "; ++s; }
3145 sv = newSVpvn(use,4);
3147 /* We allow -M'Module qw(Foo Bar)' */
3148 while(isALNUM(*s) || *s==':') {
3157 Perl_croak(aTHX_ "Module name required with -%c option",
3160 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3161 "contains single ':'",
3162 (int)(s - start), start, option);
3163 end = s + strlen(s);
3165 sv_catpvn(sv, start, end - start);
3166 if (option == 'm') {
3168 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3169 sv_catpvs( sv, " ()");
3172 sv_catpvn(sv, start, s-start);
3173 /* Use NUL as q''-delimiter. */
3174 sv_catpvs(sv, " split(/,/,q\0");
3176 sv_catpvn(sv, s, end - s);
3177 sv_catpvs(sv, "\0)");
3180 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3183 Perl_croak(aTHX_ "Missing argument to -%c", option);
3194 forbid_setid('s', FALSE);
3195 PL_doswitches = TRUE;
3209 PL_do_undump = TRUE;
3217 if (!sv_derived_from(PL_patchlevel, "version"))
3218 upg_version(PL_patchlevel, TRUE);
3221 SV* level= vstringify(PL_patchlevel);
3222 #ifdef PERL_PATCHNUM
3223 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3224 SV *num = newSVpvs(PERL_PATCHNUM "*");
3226 SV *num = newSVpvs(PERL_PATCHNUM);
3229 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3230 SvREFCNT_dec(level);
3233 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3237 PerlIO_printf(PerlIO_stdout(),
3238 "\nThis is perl " STRINGIFY(PERL_REVISION)
3239 ", version " STRINGIFY(PERL_VERSION)
3240 ", subversion " STRINGIFY(PERL_SUBVERSION)
3241 " (%"SVf") built for " ARCHNAME, level
3243 SvREFCNT_dec(level);
3246 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3247 PerlIO_printf(PerlIO_stdout(),
3248 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3249 SVfARG(vstringify(PL_patchlevel))));
3250 PerlIO_printf(PerlIO_stdout(),
3251 Perl_form(aTHX_ " built under %s at %s %s\n",
3252 OSNAME, __DATE__, __TIME__));
3253 PerlIO_printf(PerlIO_stdout(),
3254 Perl_form(aTHX_ " OS Specific Release: %s\n",
3257 #if defined(LOCAL_PATCH_COUNT)
3258 if (LOCAL_PATCH_COUNT > 0)
3259 PerlIO_printf(PerlIO_stdout(),
3260 "\n(with %d registered patch%s, "
3261 "see perl -V for more detail)",
3263 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "\n\nCopyright 1987-2010, Larry Wall\n");
3269 PerlIO_printf(PerlIO_stdout(),
3270 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3275 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3278 PerlIO_printf(PerlIO_stdout(),
3279 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3280 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "atariST series port, ++jrb bammi@cadence.com\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3303 PerlIO_printf(PerlIO_stdout(),
3304 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3311 PerlIO_printf(PerlIO_stdout(),
3312 "EPOC port by Olaf Flebbe, 1999-2002\n");
3315 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3316 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3319 #ifdef __SYMBIAN32__
3320 PerlIO_printf(PerlIO_stdout(),
3321 "Symbian port by Nokia, 2004-2005\n");
3323 #ifdef BINARY_BUILD_NOTICE
3324 BINARY_BUILD_NOTICE;
3326 PerlIO_printf(PerlIO_stdout(),
3328 Perl may be copied only under the terms of either the Artistic License or the\n\
3329 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3330 Complete documentation for Perl, including FAQ lists, should be found on\n\
3331 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3332 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3335 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3336 PL_dowarn |= G_WARN_ON;
3341 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3342 if (!specialWARN(PL_compiling.cop_warnings))
3343 PerlMemShared_free(PL_compiling.cop_warnings);
3344 PL_compiling.cop_warnings = pWARN_ALL ;
3348 PL_dowarn = G_WARN_ALL_OFF;
3349 if (!specialWARN(PL_compiling.cop_warnings))
3350 PerlMemShared_free(PL_compiling.cop_warnings);
3351 PL_compiling.cop_warnings = pWARN_NONE ;
3358 if (s[0] == '-') /* Additional switches on #! line. */
3363 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3369 #ifdef ALTERNATE_SHEBANG
3370 case 'S': /* OS/2 needs -S on "extproc" line. */
3374 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3379 /* compliments of Tom Christiansen */
3381 /* unexec() can be found in the Gnu emacs distribution */
3382 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3385 Perl_my_unexec(pTHX)
3387 PERL_UNUSED_CONTEXT;
3389 SV * prog = newSVpv(BIN_EXP, 0);
3390 SV * file = newSVpv(PL_origfilename, 0);
3394 sv_catpvs(prog, "/perl");
3395 sv_catpvs(file, ".perldump");
3397 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3398 /* unexec prints msg to stderr in case of failure */
3399 PerlProc_exit(status);
3402 # include <lib$routines.h>
3403 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3404 # elif defined(WIN32) || defined(__CYGWIN__)
3405 Perl_croak(aTHX_ "dump is not supported");
3407 ABORT(); /* for use with undump */
3412 /* initialize curinterp */
3418 # define PERLVAR(var,type)
3419 # define PERLVARA(var,n,type)
3420 # if defined(PERL_IMPLICIT_CONTEXT)
3421 # define PERLVARI(var,type,init) aTHX->var = init;
3422 # define PERLVARIC(var,type,init) aTHX->var = init;
3424 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3425 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3427 # include "intrpvar.h"
3433 # define PERLVAR(var,type)
3434 # define PERLVARA(var,n,type)
3435 # define PERLVARI(var,type,init) PL_##var = init;
3436 # define PERLVARIC(var,type,init) PL_##var = init;
3437 # include "intrpvar.h"
3444 /* As these are inside a structure, PERLVARI isn't capable of initialising
3446 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3447 PL_reg_poscache = PL_reg_starttry = NULL;
3451 S_init_main_stash(pTHX)
3456 PL_curstash = PL_defstash = newHV();
3457 /* We know that the string "main" will be in the global shared string
3458 table, so it's a small saving to use it rather than allocate another
3460 PL_curstname = newSVpvs_share("main");
3461 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3462 /* If we hadn't caused another reference to "main" to be in the shared
3463 string table above, then it would be worth reordering these two,
3464 because otherwise all we do is delete "main" from it as a consequence
3465 of the SvREFCNT_dec, only to add it again with hv_name_set */
3466 SvREFCNT_dec(GvHV(gv));
3467 hv_name_set(PL_defstash, "main", 4, 0);
3468 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3470 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3472 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3473 GvMULTI_on(PL_incgv);
3474 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3475 GvMULTI_on(PL_hintgv);
3476 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3477 SvREFCNT_inc_simple_void(PL_defgv);
3478 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3479 SvREFCNT_inc_simple_void(PL_errgv);
3480 GvMULTI_on(PL_errgv);
3481 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3482 GvMULTI_on(PL_replgv);
3483 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3484 #ifdef PERL_DONT_CREATE_GVSV
3487 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3489 PL_curstash = PL_defstash;
3490 CopSTASH_set(&PL_compiling, PL_defstash);
3491 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3492 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3494 /* We must init $/ before switches are processed. */
3495 sv_setpvs(get_sv("/", GV_ADD), "\n");
3499 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3500 bool *suidscript, PerlIO **rsfpp)
3505 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3508 PL_origfilename = savepvs("-e");
3511 /* if find_script() returns, it returns a malloc()-ed value */
3512 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3514 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3515 const char *s = scriptname + 8;
3521 * Tell apart "normal" usage of fdscript, e.g.
3522 * with bash on FreeBSD:
3523 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3524 * from usage in suidperl.
3525 * Does any "normal" usage leave garbage after the number???
3526 * Is it a mistake to use a similar /dev/fd/ construct for
3531 * Be supersafe and do some sanity-checks.
3532 * Still, can we be sure we got the right thing?
3535 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3538 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3540 scriptname = savepv(s + 1);
3541 Safefree(PL_origfilename);
3542 PL_origfilename = (char *)scriptname;
3547 CopFILE_free(PL_curcop);
3548 CopFILE_set(PL_curcop, PL_origfilename);
3549 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3550 scriptname = (char *)"";
3551 if (fdscript >= 0) {
3552 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3553 # if defined(HAS_FCNTL) && defined(F_SETFD)
3555 /* ensure close-on-exec */
3556 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3559 else if (!*scriptname) {
3560 forbid_setid(0, *suidscript);
3561 *rsfpp = PerlIO_stdin();
3564 #ifdef FAKE_BIT_BUCKET
3565 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3566 * is called) and still have the "-e" work. (Believe it or not,
3567 * a /dev/null is required for the "-e" to work because source
3568 * filter magic is used to implement it. ) This is *not* a general
3569 * replacement for a /dev/null. What we do here is create a temp
3570 * file (an empty file), open up that as the script, and then
3571 * immediately close and unlink it. Close enough for jazz. */
3572 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3573 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3574 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3575 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3576 FAKE_BIT_BUCKET_TEMPLATE
3578 const char * const err = "Failed to create a fake bit bucket";
3579 if (strEQ(scriptname, BIT_BUCKET)) {
3580 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3581 int tmpfd = mkstemp(tmpname);
3583 scriptname = tmpname;
3586 Perl_croak(aTHX_ err);
3589 scriptname = mktemp(tmpname);
3591 Perl_croak(aTHX_ err);
3596 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3597 #ifdef FAKE_BIT_BUCKET
3598 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3599 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3600 && strlen(scriptname) == sizeof(tmpname) - 1) {
3603 scriptname = BIT_BUCKET;
3605 # if defined(HAS_FCNTL) && defined(F_SETFD)
3607 /* ensure close-on-exec */
3608 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3612 /* PSz 16 Sep 03 Keep neat error message */
3614 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3616 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3617 CopFILE(PL_curcop), Strerror(errno));
3623 * I_SYSSTATVFS HAS_FSTATVFS
3625 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3626 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3627 * here so that metaconfig picks them up. */
3630 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3631 /* Don't even need this function. */
3634 S_validate_suid(pTHX_ PerlIO *rsfp)
3636 PERL_ARGS_ASSERT_VALIDATE_SUID;
3638 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3641 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3642 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3644 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3647 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3648 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3649 /* not set-id, must be wrapped */
3652 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3655 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3659 register const char *s2;
3661 PERL_ARGS_ASSERT_FIND_BEGINNING;
3663 /* skip forward in input to the real script? */
3665 while (PL_doextract) {
3666 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3667 Perl_croak(aTHX_ "No Perl script found in input\n");
3669 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3670 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3671 PL_doextract = FALSE;
3672 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3674 while (*s == ' ' || *s == '\t') s++;
3676 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3677 || s2[-1] == '_') s2--;
3678 if (strnEQ(s2-4,"perl",4))
3679 while ((s = moreswitches(s)))
3691 PL_uid = PerlProc_getuid();
3692 PL_euid = PerlProc_geteuid();
3693 PL_gid = PerlProc_getgid();
3694 PL_egid = PerlProc_getegid();
3696 PL_uid |= PL_gid << 16;
3697 PL_euid |= PL_egid << 16;
3699 /* Should not happen: */
3700 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3701 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3704 * Should go by suidscript, not uid!=euid: why disallow
3705 * system("ls") in scripts run from setuid things?
3706 * Or, is this run before we check arguments and set suidscript?
3707 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3708 * (We never have suidscript, can we be sure to have fdscript?)
3709 * Or must then go by UID checks? See comments in forbid_setid also.
3713 /* This is used very early in the lifetime of the program,
3714 * before even the options are parsed, so PL_tainting has
3715 * not been initialized properly. */
3717 Perl_doing_taint(int argc, char *argv[], char *envp[])
3719 #ifndef PERL_IMPLICIT_SYS
3720 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3721 * before we have an interpreter-- and the whole point of this
3722 * function is to be called at such an early stage. If you are on
3723 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3724 * "tainted because running with altered effective ids', you'll
3725 * have to add your own checks somewhere in here. The two most
3726 * known samples of 'implicitness' are Win32 and NetWare, neither
3727 * of which has much of concept of 'uids'. */
3728 int uid = PerlProc_getuid();
3729 int euid = PerlProc_geteuid();
3730 int gid = PerlProc_getgid();
3731 int egid = PerlProc_getegid();
3738 if (uid && (euid != uid || egid != gid))
3740 #endif /* !PERL_IMPLICIT_SYS */
3741 /* This is a really primitive check; environment gets ignored only
3742 * if -T are the first chars together; otherwise one gets
3743 * "Too late" message. */
3744 if ( argc > 1 && argv[1][0] == '-'
3745 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3750 /* Passing the flag as a single char rather than a string is a slight space
3751 optimisation. The only message that isn't /^-.$/ is
3752 "program input from stdin", which is substituted in place of '\0', which
3753 could never be a command line flag. */
3755 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3758 char string[3] = "-x";
3759 const char *message = "program input from stdin";
3766 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3767 if (PL_euid != PL_uid)
3768 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3769 if (PL_egid != PL_gid)
3770 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3771 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3773 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3777 Perl_init_debugger(pTHX)
3780 HV * const ostash = PL_curstash;
3782 PL_curstash = PL_debstash;
3783 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
3785 AvREAL_off(PL_dbargs);
3786 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3787 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3788 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3789 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3790 if (!SvIOK(PL_DBsingle))
3791 sv_setiv(PL_DBsingle, 0);
3792 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3793 if (!SvIOK(PL_DBtrace))
3794 sv_setiv(PL_DBtrace, 0);
3795 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3796 if (!SvIOK(PL_DBsignal))
3797 sv_setiv(PL_DBsignal, 0);
3798 PL_curstash = ostash;
3801 #ifndef STRESS_REALLOC
3802 #define REASONABLE(size) (size)
3804 #define REASONABLE(size) (1) /* unreasonable */
3808 Perl_init_stacks(pTHX)
3811 /* start with 128-item stack and 8K cxstack */
3812 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3813 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3814 PL_curstackinfo->si_type = PERLSI_MAIN;
3815 PL_curstack = PL_curstackinfo->si_stack;
3816 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3818 PL_stack_base = AvARRAY(PL_curstack);
3819 PL_stack_sp = PL_stack_base;
3820 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3822 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3825 PL_tmps_max = REASONABLE(128);
3827 Newx(PL_markstack,REASONABLE(32),I32);
3828 PL_markstack_ptr = PL_markstack;
3829 PL_markstack_max = PL_markstack + REASONABLE(32);
3833 Newx(PL_scopestack,REASONABLE(32),I32);
3835 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3837 PL_scopestack_ix = 0;
3838 PL_scopestack_max = REASONABLE(32);
3840 Newx(PL_savestack,REASONABLE(128),ANY);
3841 PL_savestack_ix = 0;
3842 PL_savestack_max = REASONABLE(128);
3851 while (PL_curstackinfo->si_next)
3852 PL_curstackinfo = PL_curstackinfo->si_next;
3853 while (PL_curstackinfo) {
3854 PERL_SI *p = PL_curstackinfo->si_prev;
3855 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3856 Safefree(PL_curstackinfo->si_cxstack);
3857 Safefree(PL_curstackinfo);
3858 PL_curstackinfo = p;
3860 Safefree(PL_tmps_stack);
3861 Safefree(PL_markstack);
3862 Safefree(PL_scopestack);
3864 Safefree(PL_scopestack_name);
3866 Safefree(PL_savestack);
3871 S_init_predump_symbols(pTHX)
3878 sv_setpvs(get_sv("\"", GV_ADD), " ");
3879 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3882 /* Historically, PVIOs were blessed into IO::Handle, unless
3883 FileHandle was loaded, in which case they were blessed into
3884 that. Action at a distance.
3885 However, if we simply bless into IO::Handle, we break code
3886 that assumes that PVIOs will have (among others) a seek
3887 method. IO::File inherits from IO::Handle and IO::Seekable,
3888 and provides the needed methods. But if we simply bless into
3889 it, then we break code that assumed that by loading
3890 IO::Handle, *it* would work.
3891 So a compromise is to set up the correct @IO::File::ISA,
3892 so that code that does C<use IO::Handle>; will still work.
3895 isa = get_av("IO::File::ISA", GV_ADD | GV_ADDMULTI);
3896 av_push(isa, newSVpvs("IO::Handle"));
3897 av_push(isa, newSVpvs("IO::Seekable"));
3898 av_push(isa, newSVpvs("Exporter"));
3899 (void) gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVGV);
3900 (void) gv_fetchpvs("IO::Seekable::", GV_ADD, SVt_PVGV);
3901 (void) gv_fetchpvs("Exporter::", GV_ADD, SVt_PVGV);
3904 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3905 GvMULTI_on(PL_stdingv);
3906 io = GvIOp(PL_stdingv);
3907 IoTYPE(io) = IoTYPE_RDONLY;
3908 IoIFP(io) = PerlIO_stdin();
3909 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3911 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3913 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3916 IoTYPE(io) = IoTYPE_WRONLY;
3917 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3919 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3921 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3923 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3924 GvMULTI_on(PL_stderrgv);
3925 io = GvIOp(PL_stderrgv);
3926 IoTYPE(io) = IoTYPE_WRONLY;
3927 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3928 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3930 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3932 PL_statname = newSV(0); /* last filename we did stat on */
3936 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3940 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3942 argc--,argv++; /* skip name of script */
3943 if (PL_doswitches) {
3944 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3948 if (argv[0][1] == '-' && !argv[0][2]) {
3952 if ((s = strchr(argv[0], '='))) {
3953 const char *const start_name = argv[0] + 1;
3954 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3955 TRUE, SVt_PV)), s + 1);
3958 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3961 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3962 GvMULTI_on(PL_argvgv);
3963 (void)gv_AVadd(PL_argvgv);
3964 av_clear(GvAVn(PL_argvgv));
3965 for (; argc > 0; argc--,argv++) {
3966 SV * const sv = newSVpv(argv[0],0);
3967 av_push(GvAVn(PL_argvgv),sv);
3968 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3969 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3972 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3973 (void)sv_utf8_decode(sv);
3979 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
3984 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
3986 PL_toptarget = newSV_type(SVt_PVFM);
3987 sv_setpvs(PL_toptarget, "");
3988 PL_bodytarget = newSV_type(SVt_PVFM);
3989 sv_setpvs(PL_bodytarget, "");
3990 PL_formtarget = PL_bodytarget;
3994 init_argv_symbols(argc,argv);
3996 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
3997 sv_setpv(GvSV(tmpgv),PL_origfilename);
3999 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4001 bool env_is_not_environ;
4002 GvMULTI_on(PL_envgv);
4003 hv = GvHVn(PL_envgv);
4004 hv_magic(hv, NULL, PERL_MAGIC_env);
4006 #ifdef USE_ENVIRON_ARRAY
4007 /* Note that if the supplied env parameter is actually a copy
4008 of the global environ then it may now point to free'd memory
4009 if the environment has been modified since. To avoid this
4010 problem we treat env==NULL as meaning 'use the default'
4014 env_is_not_environ = env != environ;
4015 if (env_is_not_environ
4016 # ifdef USE_ITHREADS
4017 && PL_curinterp == aTHX
4026 for (; *env; env++) {
4029 if (!(s = strchr(old_var,'=')) || s == old_var)
4032 #if defined(MSDOS) && !defined(DJGPP)
4034 (void)strupr(old_var);
4037 sv = newSVpv(s+1, 0);
4038 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4039 if (env_is_not_environ)
4043 #endif /* USE_ENVIRON_ARRAY */
4044 #endif /* !PERL_MICRO */
4047 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4048 SvREADONLY_off(GvSV(tmpgv));
4049 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4050 SvREADONLY_on(GvSV(tmpgv));
4052 #ifdef THREADS_HAVE_PIDS
4053 PL_ppid = (IV)getppid();
4056 /* touch @F array to prevent spurious warnings 20020415 MJD */
4058 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4063 S_init_perllib(pTHX)
4067 const char *perl5lib = NULL;
4070 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4076 perl5lib = PerlEnv_getenv("PERL5LIB");
4078 * It isn't possible to delete an environment variable with
4079 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4080 * case we treat PERL5LIB as undefined if it has a zero-length value.
4082 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4083 if (perl5lib && *perl5lib != '\0')
4087 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4089 s = PerlEnv_getenv("PERLLIB");
4091 incpush_use_sep(s, 0, 0);
4094 /* Treat PERL5?LIB as a possible search list logical name -- the
4095 * "natural" VMS idiom for a Unix path string. We allow each
4096 * element to be a set of |-separated directories for compatibility.
4100 if (my_trnlnm("PERL5LIB",buf,0))
4102 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4103 } while (my_trnlnm("PERL5LIB",buf,++idx));
4105 while (my_trnlnm("PERLLIB",buf,idx++))
4106 incpush_use_sep(buf, 0, 0);
4111 #ifndef PERL_IS_MINIPERL
4112 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4113 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4115 /* Use the ~-expanded versions of APPLLIB (undocumented),
4116 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4119 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4120 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4124 /* sitearch is always relative to sitelib on Windows for
4125 * DLL-based path intuition to work correctly */
4126 # if !defined(WIN32)
4127 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4128 INCPUSH_CAN_RELOCATE);
4134 /* this picks up sitearch as well */
4135 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4137 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4139 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4143 #ifdef PERL_VENDORARCH_EXP
4144 /* vendorarch is always relative to vendorlib on Windows for
4145 * DLL-based path intuition to work correctly */
4146 # if !defined(WIN32)
4147 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4148 INCPUSH_CAN_RELOCATE);
4152 #ifdef PERL_VENDORLIB_EXP
4154 /* this picks up vendorarch as well */
4155 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4157 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4159 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4160 INCPUSH_CAN_RELOCATE);
4165 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4169 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4173 s = win32_get_privlib(PERL_FS_VERSION, &len);
4175 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4178 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4180 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4184 #ifdef PERL_OTHERLIBDIRS
4185 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4186 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4187 |INCPUSH_CAN_RELOCATE);
4193 * It isn't possible to delete an environment variable with
4194 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4195 * case we treat PERL5LIB as undefined if it has a zero-length value.
4197 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4198 if (perl5lib && *perl5lib != '\0')
4202 incpush_use_sep(perl5lib, 0,
4203 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4205 /* Treat PERL5?LIB as a possible search list logical name -- the
4206 * "natural" VMS idiom for a Unix path string. We allow each
4207 * element to be a set of |-separated directories for compatibility.
4211 if (my_trnlnm("PERL5LIB",buf,0))
4213 incpush_use_sep(buf, 0,
4214 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4215 } while (my_trnlnm("PERL5LIB",buf,++idx));
4219 /* Use the ~-expanded versions of APPLLIB (undocumented),
4220 SITELIB and VENDORLIB for older versions
4223 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4224 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4227 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4228 /* Search for version-specific dirs below here */
4229 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4230 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4234 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4235 /* Search for version-specific dirs below here */
4236 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4237 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4240 #ifdef PERL_OTHERLIBDIRS
4241 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4242 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4243 |INCPUSH_CAN_RELOCATE);
4245 #endif /* !PERL_IS_MINIPERL */
4248 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4251 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4252 # define PERLLIB_SEP ';'
4255 # define PERLLIB_SEP '|'
4257 # define PERLLIB_SEP ':'
4260 #ifndef PERLLIB_MANGLE
4261 # define PERLLIB_MANGLE(s,n) (s)
4264 /* Push a directory onto @INC if it exists.
4265 Generate a new SV if we do this, to save needing to copy the SV we push
4268 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4273 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4275 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4276 S_ISDIR(tmpstatbuf.st_mode)) {
4278 dir = newSVsv(stem);
4280 /* Truncate dir back to stem. */
4281 SvCUR_set(dir, SvCUR(stem));
4287 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4290 const U8 using_sub_dirs
4291 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4292 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4293 const U8 add_versioned_sub_dirs
4294 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4295 const U8 add_archonly_sub_dirs
4296 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4297 #ifdef PERL_INC_VERSION_LIST
4298 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4300 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4301 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4302 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4303 AV *const inc = GvAVn(PL_incgv);
4305 PERL_ARGS_ASSERT_INCPUSH;
4308 /* Could remove this vestigial extra block, if we don't mind a lot of
4309 re-indenting diff noise. */
4312 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4313 arranged to unshift #! line -I onto the front of @INC. However,
4314 -I can add version and architecture specific libraries, and they
4315 need to go first. The old code assumed that it was always
4316 pushing. Hence to make it work, need to push the architecture
4317 (etc) libraries onto a temporary array, then "unshift" that onto
4318 the front of @INC. */
4319 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4322 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4323 defined to so something (in os2/os2.c), but the code has been
4324 this way, ignoring any possible changed of length, since
4325 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4327 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4329 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4332 /* Do the if() outside the #ifdef to avoid warnings about an unused
4335 #ifdef PERL_RELOCATABLE_INC
4337 * Relocatable include entries are marked with a leading .../
4340 * 0: Remove that leading ".../"
4341 * 1: Remove trailing executable name (anything after the last '/')
4342 * from the perl path to give a perl prefix
4344 * While the @INC element starts "../" and the prefix ends with a real
4345 * directory (ie not . or ..) chop that real directory off the prefix
4346 * and the leading "../" from the @INC element. ie a logical "../"
4348 * Finally concatenate the prefix and the remainder of the @INC element
4349 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4350 * generates /usr/local/lib/perl5
4352 const char *libpath = SvPVX(libdir);
4353 STRLEN libpath_len = SvCUR(libdir);
4354 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4356 SV * const caret_X = get_sv("\030", 0);
4357 /* Going to use the SV just as a scratch buffer holding a C
4363 /* $^X is *the* source of taint if tainting is on, hence
4364 SvPOK() won't be true. */
4366 assert(SvPOKp(caret_X));
4367 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4369 /* Firstly take off the leading .../
4370 If all else fail we'll do the paths relative to the current
4372 sv_chop(libdir, libpath + 4);
4373 /* Don't use SvPV as we're intentionally bypassing taining,
4374 mortal copies that the mg_get of tainting creates, and
4375 corruption that seems to come via the save stack.
4376 I guess that the save stack isn't correctly set up yet. */
4377 libpath = SvPVX(libdir);
4378 libpath_len = SvCUR(libdir);
4380 /* This would work more efficiently with memrchr, but as it's
4381 only a GNU extension we'd need to probe for it and
4382 implement our own. Not hard, but maybe not worth it? */
4384 prefix = SvPVX(prefix_sv);
4385 lastslash = strrchr(prefix, '/');
4387 /* First time in with the *lastslash = '\0' we just wipe off
4388 the trailing /perl from (say) /usr/foo/bin/perl
4392 while ((*lastslash = '\0'), /* Do that, come what may. */
4393 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4394 && (lastslash = strrchr(prefix, '/')))) {
4395 if (lastslash[1] == '\0'
4396 || (lastslash[1] == '.'
4397 && (lastslash[2] == '/' /* ends "/." */
4398 || (lastslash[2] == '/'
4399 && lastslash[3] == '/' /* or "/.." */
4401 /* Prefix ends "/" or "/." or "/..", any of which
4402 are fishy, so don't do any more logical cleanup.
4406 /* Remove leading "../" from path */
4409 /* Next iteration round the loop removes the last
4410 directory name from prefix by writing a '\0' in
4411 the while clause. */
4413 /* prefix has been terminated with a '\0' to the correct
4414 length. libpath points somewhere into the libdir SV.
4415 We need to join the 2 with '/' and drop the result into
4417 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4418 SvREFCNT_dec(libdir);
4419 /* And this is the new libdir. */
4422 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4423 /* Need to taint reloccated paths if running set ID */
4424 SvTAINTED_on(libdir);
4427 SvREFCNT_dec(prefix_sv);
4432 * BEFORE pushing libdir onto @INC we may first push version- and
4433 * archname-specific sub-directories.
4435 if (using_sub_dirs) {
4437 #ifdef PERL_INC_VERSION_LIST
4438 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4439 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4440 const char * const *incver;
4447 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4449 while (unix[len-1] == '/') len--; /* Cosmetic */
4450 sv_usepvn(libdir,unix,len);
4453 PerlIO_printf(Perl_error_log,
4454 "Failed to unixify @INC element \"%s\"\n",
4458 subdir = newSVsv(libdir);
4460 if (add_versioned_sub_dirs) {
4461 /* .../version/archname if -d .../version/archname */
4462 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4463 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4465 /* .../version if -d .../version */
4466 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4467 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4470 #ifdef PERL_INC_VERSION_LIST
4472 for (incver = incverlist; *incver; incver++) {
4473 /* .../xxx if -d .../xxx */
4474 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4475 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4480 if (add_archonly_sub_dirs) {
4481 /* .../archname if -d .../archname */
4482 sv_catpvs(subdir, "/" ARCHNAME);
4483 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4487 assert (SvREFCNT(subdir) == 1);
4488 SvREFCNT_dec(subdir);
4491 /* finally add this lib directory at the end of @INC */
4493 U32 extra = av_len(av) + 1;
4494 av_unshift(inc, extra + push_basedir);
4496 av_store(inc, extra, libdir);
4498 /* av owns a reference, av_store() expects to be donated a
4499 reference, and av expects to be sane when it's cleared.
4500 If I wanted to be naughty and wrong, I could peek inside the
4501 implementation of av_clear(), realise that it uses
4502 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4503 and so directly steal from it (with a memcpy() to inc, and
4504 then memset() to NULL them out. But people copy code from the
4505 core expecting it to be best practise, so let's use the API.
4506 Although studious readers will note that I'm not checking any
4508 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4512 else if (push_basedir) {
4513 av_push(inc, libdir);
4516 if (!push_basedir) {
4517 assert (SvREFCNT(libdir) == 1);
4518 SvREFCNT_dec(libdir);
4524 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4528 /* This logic has been broken out from S_incpush(). It may be possible to
4531 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4538 /* Break at all separators */
4539 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4541 /* skip any consecutive separators */
4543 /* Uncomment the next line for PATH semantics */
4544 /* But you'll need to write tests */
4545 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4547 incpush(p, (STRLEN)(s - p), flags);
4552 incpush(p, (STRLEN)(end - p), flags);
4557 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4561 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4567 PERL_ARGS_ASSERT_CALL_LIST;
4569 while (av_len(paramList) >= 0) {
4570 cv = MUTABLE_CV(av_shift(paramList));
4572 if (paramList == PL_beginav) {
4573 /* save PL_beginav for compiler */
4574 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4576 else if (paramList == PL_checkav) {
4577 /* save PL_checkav for compiler */
4578 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4580 else if (paramList == PL_unitcheckav) {
4581 /* save PL_unitcheckav for compiler */
4582 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4593 PL_madskills |= 16384;
4598 PL_madskills &= ~16384;
4601 (void)SvPV_const(atsv, len);
4603 PL_curcop = &PL_compiling;
4604 CopLINE_set(PL_curcop, oldline);
4605 if (paramList == PL_beginav)
4606 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4608 Perl_sv_catpvf(aTHX_ atsv,
4609 "%s failed--call queue aborted",
4610 paramList == PL_checkav ? "CHECK"
4611 : paramList == PL_initav ? "INIT"
4612 : paramList == PL_unitcheckav ? "UNITCHECK"
4614 while (PL_scopestack_ix > oldscope)
4617 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4624 /* my_exit() was called */
4625 while (PL_scopestack_ix > oldscope)
4628 PL_curstash = PL_defstash;
4629 PL_curcop = &PL_compiling;
4630 CopLINE_set(PL_curcop, oldline);
4636 PL_curcop = &PL_compiling;
4637 CopLINE_set(PL_curcop, oldline);
4640 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4649 Perl_my_exit(pTHX_ U32 status)
4660 STATUS_EXIT_SET(status);
4667 Perl_my_failure_exit(pTHX)
4671 /* We have been called to fall on our sword. The desired exit code
4672 * should be already set in STATUS_UNIX, but could be shifted over
4673 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4676 * If an error code has not been set, then force the issue.
4678 if (MY_POSIX_EXIT) {
4680 /* According to the die_exit.t tests, if errno is non-zero */
4681 /* It should be used for the error status. */
4683 if (errno == EVMSERR) {
4684 STATUS_NATIVE = vaxc$errno;
4687 /* According to die_exit.t tests, if the child_exit code is */
4688 /* also zero, then we need to exit with a code of 255 */
4689 if ((errno != 0) && (errno < 256))
4690 STATUS_UNIX_EXIT_SET(errno);
4691 else if (STATUS_UNIX < 255) {
4692 STATUS_UNIX_EXIT_SET(255);
4697 /* The exit code could have been set by $? or vmsish which
4698 * means that it may not have fatal set. So convert
4699 * success/warning codes to fatal with out changing
4700 * the POSIX status code. The severity makes VMS native
4701 * status handling work, while UNIX mode programs use the
4702 * the POSIX exit codes.
4704 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4705 STATUS_NATIVE &= STS$M_COND_ID;
4706 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4710 /* Traditionally Perl on VMS always expects a Fatal Error. */
4711 if (vaxc$errno & 1) {
4713 /* So force success status to failure */
4714 if (STATUS_NATIVE & 1)
4719 STATUS_UNIX = EINTR; /* In case something cares */
4724 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4726 /* Encode the severity code */
4727 severity = STATUS_NATIVE & STS$M_SEVERITY;
4728 STATUS_UNIX = (severity ? severity : 1) << 8;
4730 /* Perl expects this to be a fatal error */
4731 if (severity != STS$K_SEVERE)
4740 STATUS_UNIX_SET(errno);
4742 exitstatus = STATUS_UNIX >> 8;
4743 if (exitstatus & 255)
4744 STATUS_UNIX_SET(exitstatus);
4746 STATUS_UNIX_SET(255);
4753 S_my_exit_jump(pTHX)
4758 SvREFCNT_dec(PL_e_script);
4762 POPSTACK_TO(PL_mainstack);
4770 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4773 const char * const p = SvPVX_const(PL_e_script);
4774 const char *nl = strchr(p, '\n');
4776 PERL_UNUSED_ARG(idx);
4777 PERL_UNUSED_ARG(maxlen);
4779 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4781 filter_del(read_e_script);
4784 sv_catpvn(buf_sv, p, nl-p);
4785 sv_chop(PL_e_script, nl);
4791 * c-indentation-style: bsd
4793 * indent-tabs-mode: t
4796 * ex: set ts=8 sts=4 sw=4 noet: