3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
184 #ifdef PERL_IMPLICIT_SYS
186 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
187 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
188 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
189 struct IPerlDir* ipD, struct IPerlSock* ipS,
190 struct IPerlProc* ipP)
192 PerlInterpreter *my_perl;
193 /* Newx() needs interpreter, so call malloc() instead */
194 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
195 S_init_tls_and_interp(my_perl);
196 Zero(my_perl, 1, PerlInterpreter);
206 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
213 =head1 Embedding Functions
215 =for apidoc perl_alloc
217 Allocates a new Perl interpreter. See L<perlembed>.
225 PerlInterpreter *my_perl;
227 /* Newx() needs interpreter, so call malloc() instead */
228 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
230 S_init_tls_and_interp(my_perl);
231 #ifndef PERL_TRACK_MEMPOOL
232 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
234 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
239 #endif /* PERL_IMPLICIT_SYS */
242 =for apidoc perl_construct
244 Initializes a new Perl interpreter. See L<perlembed>.
250 perl_construct(pTHXx)
253 PERL_UNUSED_ARG(my_perl);
256 PL_perl_destruct_level = 1;
258 if (PL_perl_destruct_level > 0)
261 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
263 /* set read-only and try to insure than we wont see REFCNT==0
266 SvREADONLY_on(&PL_sv_undef);
267 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
269 sv_setpv(&PL_sv_no,PL_No);
270 /* value lookup in void context - happens to have the side effect
271 of caching the numeric forms. */
274 SvREADONLY_on(&PL_sv_no);
275 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
277 sv_setpv(&PL_sv_yes,PL_Yes);
280 SvREADONLY_on(&PL_sv_yes);
281 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
283 SvREADONLY_on(&PL_sv_placeholder);
284 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
286 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
287 #ifdef PERL_USES_PL_PIDSTATUS
288 PL_pidstatus = newHV();
291 PL_rs = newSVpvs("\n");
301 SET_NUMERIC_STANDARD();
303 #if defined(LOCAL_PATCH_COUNT)
304 PL_localpatches = local_patches; /* For possible -v */
307 #ifdef HAVE_INTERP_INTERN
311 PerlIO_init(aTHX); /* Hook to IO system */
313 PL_fdpid = newAV(); /* for remembering popen pids by fd */
314 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
315 PL_errors = newSVpvs("");
316 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
317 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
318 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
320 /* First entry is an array of empty elements */
321 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
322 PL_regex_pad = AvARRAY(PL_regex_padav);
324 #ifdef USE_REENTRANT_API
325 Perl_reentrant_init(aTHX);
328 /* Note that strtab is a rather special HV. Assumptions are made
329 about not iterating on it, and not adding tie magic to it.
330 It is properly deallocated in perl_destruct() */
333 HvSHAREKEYS_off(PL_strtab); /* mandatory */
334 hv_ksplit(PL_strtab, 512);
336 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
337 _dyld_lookup_and_bind
338 ("__environ", (unsigned long *) &environ_pointer, NULL);
342 # ifdef USE_ENVIRON_ARRAY
343 PL_origenviron = environ;
347 /* Use sysconf(_SC_CLK_TCK) if available, if not
348 * available or if the sysconf() fails, use the HZ.
349 * BeOS has those, but returns the wrong value.
350 * The HZ if not originally defined has been by now
351 * been defined as CLK_TCK, if available. */
352 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
353 PL_clocktick = sysconf(_SC_CLK_TCK);
354 if (PL_clocktick <= 0)
358 PL_stashcache = newHV();
360 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
361 (int)PERL_VERSION, (int)PERL_SUBVERSION);
364 if (!PL_mmap_page_size) {
365 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
367 SETERRNO(0, SS_NORMAL);
369 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
371 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
373 if ((long) PL_mmap_page_size < 0) {
375 SV * const error = ERRSV;
376 SvUPGRADE(error, SVt_PV);
377 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
380 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
384 # ifdef HAS_GETPAGESIZE
385 PL_mmap_page_size = getpagesize();
387 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
388 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
392 if (PL_mmap_page_size <= 0)
393 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
394 (IV) PL_mmap_page_size);
396 #endif /* HAS_MMAP */
398 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
399 PL_timesbase.tms_utime = 0;
400 PL_timesbase.tms_stime = 0;
401 PL_timesbase.tms_cutime = 0;
402 PL_timesbase.tms_cstime = 0;
409 =for apidoc nothreadhook
411 Stub that provides thread hook for perl_destruct when there are
418 Perl_nothreadhook(pTHX)
424 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
426 Perl_dump_sv_child(pTHX_ SV *sv)
429 const int sock = PL_dumper_fd;
430 const int debug_fd = PerlIO_fileno(Perl_debug_log);
431 union control_un control;
434 struct cmsghdr *cmptr;
436 unsigned char buffer[256];
438 if(sock == -1 || debug_fd == -1)
441 PerlIO_flush(Perl_debug_log);
443 /* All these shenanigans are to pass a file descriptor over to our child for
444 it to dump out to. We can't let it hold open the file descriptor when it
445 forks, as the file descriptor it will dump to can turn out to be one end
446 of pipe that some other process will wait on for EOF. (So as it would
447 be open, the wait would be forever.) */
449 msg.msg_control = control.control;
450 msg.msg_controllen = sizeof(control.control);
451 /* We're a connected socket so we don't need a destination */
457 cmptr = CMSG_FIRSTHDR(&msg);
458 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
459 cmptr->cmsg_level = SOL_SOCKET;
460 cmptr->cmsg_type = SCM_RIGHTS;
461 *((int *)CMSG_DATA(cmptr)) = 1;
463 vec[0].iov_base = (void*)&sv;
464 vec[0].iov_len = sizeof(sv);
465 got = sendmsg(sock, &msg, 0);
468 perror("Debug leaking scalars parent sendmsg failed");
471 if(got < sizeof(sv)) {
472 perror("Debug leaking scalars parent short sendmsg");
476 /* Return protocol is
478 unsigned char: length of location string (0 for empty)
479 unsigned char*: string (not terminated)
481 vec[0].iov_base = (void*)&returned_errno;
482 vec[0].iov_len = sizeof(returned_errno);
483 vec[1].iov_base = buffer;
486 got = readv(sock, vec, 2);
489 perror("Debug leaking scalars parent read failed");
490 PerlIO_flush(PerlIO_stderr());
493 if(got < sizeof(returned_errno) + 1) {
494 perror("Debug leaking scalars parent short read");
495 PerlIO_flush(PerlIO_stderr());
500 got = read(sock, buffer + 1, *buffer);
502 perror("Debug leaking scalars parent read 2 failed");
503 PerlIO_flush(PerlIO_stderr());
508 perror("Debug leaking scalars parent short read 2");
509 PerlIO_flush(PerlIO_stderr());
514 if (returned_errno || *buffer) {
515 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
516 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
517 returned_errno, strerror(returned_errno));
523 =for apidoc perl_destruct
525 Shuts down a Perl interpreter. See L<perlembed>.
534 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
536 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
540 PERL_UNUSED_ARG(my_perl);
542 /* wait for all pseudo-forked children to finish */
543 PERL_WAIT_FOR_CHILDREN;
545 destruct_level = PL_perl_destruct_level;
548 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
550 const int i = atoi(s);
551 if (destruct_level < i)
557 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
563 if (PL_endav && !PL_minus_c)
564 call_list(PL_scopestack_ix, PL_endav);
570 /* Need to flush since END blocks can produce output */
573 if (CALL_FPTR(PL_threadhook)(aTHX)) {
574 /* Threads hook has vetoed further cleanup */
575 PL_veto_cleanup = TRUE;
579 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
580 if (destruct_level != 0) {
581 /* Fork here to create a child. Our child's job is to preserve the
582 state of scalars prior to destruction, so that we can instruct it
583 to dump any scalars that we later find have leaked.
584 There's no subtlety in this code - it assumes POSIX, and it doesn't
588 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
589 perror("Debug leaking scalars socketpair failed");
595 perror("Debug leaking scalars fork failed");
599 /* We are the child */
600 const int sock = fd[1];
601 const int debug_fd = PerlIO_fileno(Perl_debug_log);
604 /* Our success message is an integer 0, and a char 0 */
605 static const char success[sizeof(int) + 1];
609 /* We need to close all other file descriptors otherwise we end up
610 with interesting hangs, where the parent closes its end of a
611 pipe, and sits waiting for (another) child to terminate. Only
612 that child never terminates, because it never gets EOF, because
613 we also have the far end of the pipe open. We even need to
614 close the debugging fd, because sometimes it happens to be one
615 end of a pipe, and a process is waiting on the other end for
616 EOF. Normally it would be closed at some point earlier in
617 destruction, but if we happen to cause the pipe to remain open,
618 EOF never occurs, and we get an infinite hang. Hence all the
619 games to pass in a file descriptor if it's actually needed. */
621 f = sysconf(_SC_OPEN_MAX);
623 where = "sysconf failed";
634 union control_un control;
637 struct cmsghdr *cmptr;
641 msg.msg_control = control.control;
642 msg.msg_controllen = sizeof(control.control);
643 /* We're a connected socket so we don't need a source */
647 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
649 vec[0].iov_base = (void*)⌖
650 vec[0].iov_len = sizeof(target);
652 got = recvmsg(sock, &msg, 0);
657 where = "recv failed";
660 if(got < sizeof(target)) {
661 where = "short recv";
665 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
669 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
670 where = "wrong cmsg_len";
673 if(cmptr->cmsg_level != SOL_SOCKET) {
674 where = "wrong cmsg_level";
677 if(cmptr->cmsg_type != SCM_RIGHTS) {
678 where = "wrong cmsg_type";
682 got_fd = *(int*)CMSG_DATA(cmptr);
683 /* For our last little bit of trickery, put the file descriptor
684 back into Perl_debug_log, as if we never actually closed it
686 if(got_fd != debug_fd) {
687 if (dup2(got_fd, debug_fd) == -1) {
694 PerlIO_flush(Perl_debug_log);
696 got = write(sock, &success, sizeof(success));
699 where = "write failed";
702 if(got < sizeof(success)) {
703 where = "short write";
710 int send_errno = errno;
711 unsigned char length = (unsigned char) strlen(where);
712 struct iovec failure[3] = {
713 {(void*)&send_errno, sizeof(send_errno)},
715 {(void*)where, length}
717 int got = writev(sock, failure, 3);
718 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
719 in the parent if we try to read from the socketpair after the
720 child has exited, even if there was data to read.
721 So sleep a bit to give the parent a fighting chance of
724 _exit((got == -1) ? errno : 0);
728 PL_dumper_fd = fd[0];
733 /* We must account for everything. */
735 /* Destroy the main CV and syntax tree */
736 /* Do this now, because destroying ops can cause new SVs to be generated
737 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
738 PL_curcop to point to a valid op from which the filename structure
740 PL_curcop = &PL_compiling;
742 /* ensure comppad/curpad to refer to main's pad */
743 if (CvPADLIST(PL_main_cv)) {
744 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
746 op_free(PL_main_root);
749 PL_main_start = NULL;
750 SvREFCNT_dec(PL_main_cv);
754 /* Tell PerlIO we are about to tear things apart in case
755 we have layers which are using resources that should
759 PerlIO_destruct(aTHX);
761 if (PL_sv_objcount) {
763 * Try to destruct global references. We do this first so that the
764 * destructors and destructees still exist. Some sv's might remain.
765 * Non-referenced objects are on their own.
769 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
770 PL_defoutgv = NULL; /* may have been freed */
773 /* unhook hooks which will soon be, or use, destroyed data */
774 SvREFCNT_dec(PL_warnhook);
776 SvREFCNT_dec(PL_diehook);
779 /* call exit list functions */
780 while (PL_exitlistlen-- > 0)
781 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
783 Safefree(PL_exitlist);
788 /* jettison our possibly duplicated environment */
789 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
790 * so we certainly shouldn't free it here
793 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
794 if (environ != PL_origenviron && !PL_use_safe_putenv
796 /* only main thread can free environ[0] contents */
797 && PL_curinterp == aTHX
803 for (i = 0; environ[i]; i++)
804 safesysfree(environ[i]);
806 /* Must use safesysfree() when working with environ. */
807 safesysfree(environ);
809 environ = PL_origenviron;
812 #endif /* !PERL_MICRO */
814 if (destruct_level == 0) {
816 DEBUG_P(debprofdump());
818 #if defined(PERLIO_LAYERS)
819 /* No more IO - including error messages ! */
820 PerlIO_cleanup(aTHX);
823 CopFILE_free(&PL_compiling);
824 CopSTASH_free(&PL_compiling);
826 /* The exit() function will do everything that needs doing. */
830 /* reset so print() ends up where we expect */
834 /* the syntax tree is shared between clones
835 * so op_free(PL_main_root) only ReREFCNT_dec's
836 * REGEXPs in the parent interpreter
837 * we need to manually ReREFCNT_dec for the clones
840 I32 i = AvFILLp(PL_regex_padav) + 1;
841 SV * const * const ary = AvARRAY(PL_regex_padav);
844 SV * const resv = ary[--i];
846 if (SvFLAGS(resv) & SVf_BREAK) {
847 /* this is PL_reg_curpm, already freed
848 * flag is set in regexec.c:S_regtry
850 SvFLAGS(resv) &= ~SVf_BREAK;
852 else if(SvREPADTMP(resv)) {
853 SvREPADTMP_off(resv);
855 else if(SvIOKp(resv)) {
856 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
861 SvREFCNT_dec(PL_regex_padav);
862 PL_regex_padav = NULL;
866 SvREFCNT_dec((SV*) PL_stashcache);
867 PL_stashcache = NULL;
869 /* loosen bonds of global variables */
871 /* XXX can PL_parser still be non-null here? */
872 if(PL_parser && PL_parser->rsfp) {
873 (void)PerlIO_close(PL_parser->rsfp);
874 PL_parser->rsfp = NULL;
878 Safefree(PL_splitstr);
883 PL_preprocess = FALSE;
889 PL_doswitches = FALSE;
890 PL_dowarn = G_WARN_OFF;
891 PL_doextract = FALSE;
892 PL_sawampersand = FALSE; /* must save all match strings */
895 Safefree(PL_inplace);
897 SvREFCNT_dec(PL_patchlevel);
900 SvREFCNT_dec(PL_e_script);
906 /* magical thingies */
908 SvREFCNT_dec(PL_ofs_sv); /* $, */
911 SvREFCNT_dec(PL_ors_sv); /* $\ */
914 SvREFCNT_dec(PL_rs); /* $/ */
917 Safefree(PL_osname); /* $^O */
920 SvREFCNT_dec(PL_statname);
924 /* defgv, aka *_ should be taken care of elsewhere */
926 /* clean up after study() */
927 SvREFCNT_dec(PL_lastscream);
928 PL_lastscream = NULL;
929 Safefree(PL_screamfirst);
931 Safefree(PL_screamnext);
935 Safefree(PL_efloatbuf);
939 /* startup and shutdown function lists */
940 SvREFCNT_dec(PL_beginav);
941 SvREFCNT_dec(PL_beginav_save);
942 SvREFCNT_dec(PL_endav);
943 SvREFCNT_dec(PL_checkav);
944 SvREFCNT_dec(PL_checkav_save);
945 SvREFCNT_dec(PL_unitcheckav);
946 SvREFCNT_dec(PL_unitcheckav_save);
947 SvREFCNT_dec(PL_initav);
949 PL_beginav_save = NULL;
952 PL_checkav_save = NULL;
953 PL_unitcheckav = NULL;
954 PL_unitcheckav_save = NULL;
957 /* shortcuts just get cleared */
966 PL_last_in_gv = NULL;
978 SvREFCNT_dec(PL_argvout_stack);
979 PL_argvout_stack = NULL;
981 SvREFCNT_dec(PL_modglobal);
983 SvREFCNT_dec(PL_preambleav);
984 PL_preambleav = NULL;
985 SvREFCNT_dec(PL_subname);
987 #ifdef PERL_USES_PL_PIDSTATUS
988 SvREFCNT_dec(PL_pidstatus);
991 SvREFCNT_dec(PL_toptarget);
993 SvREFCNT_dec(PL_bodytarget);
994 PL_bodytarget = NULL;
995 PL_formtarget = NULL;
997 /* free locale stuff */
998 #ifdef USE_LOCALE_COLLATE
999 Safefree(PL_collation_name);
1000 PL_collation_name = NULL;
1003 #ifdef USE_LOCALE_NUMERIC
1004 Safefree(PL_numeric_name);
1005 PL_numeric_name = NULL;
1006 SvREFCNT_dec(PL_numeric_radix_sv);
1007 PL_numeric_radix_sv = NULL;
1010 /* clear utf8 character classes */
1011 SvREFCNT_dec(PL_utf8_alnum);
1012 SvREFCNT_dec(PL_utf8_alnumc);
1013 SvREFCNT_dec(PL_utf8_ascii);
1014 SvREFCNT_dec(PL_utf8_alpha);
1015 SvREFCNT_dec(PL_utf8_space);
1016 SvREFCNT_dec(PL_utf8_cntrl);
1017 SvREFCNT_dec(PL_utf8_graph);
1018 SvREFCNT_dec(PL_utf8_digit);
1019 SvREFCNT_dec(PL_utf8_upper);
1020 SvREFCNT_dec(PL_utf8_lower);
1021 SvREFCNT_dec(PL_utf8_print);
1022 SvREFCNT_dec(PL_utf8_punct);
1023 SvREFCNT_dec(PL_utf8_xdigit);
1024 SvREFCNT_dec(PL_utf8_mark);
1025 SvREFCNT_dec(PL_utf8_toupper);
1026 SvREFCNT_dec(PL_utf8_totitle);
1027 SvREFCNT_dec(PL_utf8_tolower);
1028 SvREFCNT_dec(PL_utf8_tofold);
1029 SvREFCNT_dec(PL_utf8_idstart);
1030 SvREFCNT_dec(PL_utf8_idcont);
1031 PL_utf8_alnum = NULL;
1032 PL_utf8_alnumc = NULL;
1033 PL_utf8_ascii = NULL;
1034 PL_utf8_alpha = NULL;
1035 PL_utf8_space = NULL;
1036 PL_utf8_cntrl = NULL;
1037 PL_utf8_graph = NULL;
1038 PL_utf8_digit = NULL;
1039 PL_utf8_upper = NULL;
1040 PL_utf8_lower = NULL;
1041 PL_utf8_print = NULL;
1042 PL_utf8_punct = NULL;
1043 PL_utf8_xdigit = NULL;
1044 PL_utf8_mark = NULL;
1045 PL_utf8_toupper = NULL;
1046 PL_utf8_totitle = NULL;
1047 PL_utf8_tolower = NULL;
1048 PL_utf8_tofold = NULL;
1049 PL_utf8_idstart = NULL;
1050 PL_utf8_idcont = NULL;
1052 if (!specialWARN(PL_compiling.cop_warnings))
1053 PerlMemShared_free(PL_compiling.cop_warnings);
1054 PL_compiling.cop_warnings = NULL;
1055 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1056 PL_compiling.cop_hints_hash = NULL;
1057 CopFILE_free(&PL_compiling);
1058 CopSTASH_free(&PL_compiling);
1060 /* Prepare to destruct main symbol table. */
1065 SvREFCNT_dec(PL_curstname);
1066 PL_curstname = NULL;
1068 /* clear queued errors */
1069 SvREFCNT_dec(PL_errors);
1072 SvREFCNT_dec(PL_isarev);
1075 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1076 if (PL_scopestack_ix != 0)
1077 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1078 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1079 (long)PL_scopestack_ix);
1080 if (PL_savestack_ix != 0)
1081 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1082 "Unbalanced saves: %ld more saves than restores\n",
1083 (long)PL_savestack_ix);
1084 if (PL_tmps_floor != -1)
1085 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1086 (long)PL_tmps_floor + 1);
1087 if (cxstack_ix != -1)
1088 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1089 (long)cxstack_ix + 1);
1092 /* Now absolutely destruct everything, somehow or other, loops or no. */
1093 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1094 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1096 /* the 2 is for PL_fdpid and PL_strtab */
1097 while (PL_sv_count > 2 && sv_clean_all())
1100 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1101 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1102 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1103 SvFLAGS(PL_strtab) |= SVt_PVHV;
1105 AvREAL_off(PL_fdpid); /* no surviving entries */
1106 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1109 #ifdef HAVE_INTERP_INTERN
1113 /* Destruct the global string table. */
1115 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1116 * so that sv_free() won't fail on them.
1117 * Now that the global string table is using a single hunk of memory
1118 * for both HE and HEK, we either need to explicitly unshare it the
1119 * correct way, or actually free things here.
1122 const I32 max = HvMAX(PL_strtab);
1123 HE * const * const array = HvARRAY(PL_strtab);
1124 HE *hent = array[0];
1127 if (hent && ckWARN_d(WARN_INTERNAL)) {
1128 HE * const next = HeNEXT(hent);
1129 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1130 "Unbalanced string table refcount: (%ld) for \"%s\"",
1131 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1138 hent = array[riter];
1143 HvARRAY(PL_strtab) = 0;
1144 HvTOTALKEYS(PL_strtab) = 0;
1145 HvFILL(PL_strtab) = 0;
1147 SvREFCNT_dec(PL_strtab);
1150 /* free the pointer tables used for cloning */
1151 ptr_table_free(PL_ptr_table);
1152 PL_ptr_table = (PTR_TBL_t*)NULL;
1155 /* free special SVs */
1157 SvREFCNT(&PL_sv_yes) = 0;
1158 sv_clear(&PL_sv_yes);
1159 SvANY(&PL_sv_yes) = NULL;
1160 SvFLAGS(&PL_sv_yes) = 0;
1162 SvREFCNT(&PL_sv_no) = 0;
1163 sv_clear(&PL_sv_no);
1164 SvANY(&PL_sv_no) = NULL;
1165 SvFLAGS(&PL_sv_no) = 0;
1169 for (i=0; i<=2; i++) {
1170 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1171 sv_clear(PERL_DEBUG_PAD(i));
1172 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1173 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1177 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1178 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1180 #ifdef DEBUG_LEAKING_SCALARS
1181 if (PL_sv_count != 0) {
1186 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1187 svend = &sva[SvREFCNT(sva)];
1188 for (sv = sva + 1; sv < svend; ++sv) {
1189 if (SvTYPE(sv) != SVTYPEMASK) {
1190 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1192 " refcnt=%"UVuf pTHX__FORMAT "\n"
1193 "\tallocated at %s:%d %s %s%s\n",
1194 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1195 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1197 sv->sv_debug_inpad ? "for" : "by",
1198 sv->sv_debug_optype ?
1199 PL_op_name[sv->sv_debug_optype]: "(none)",
1200 sv->sv_debug_cloned ? " (cloned)" : ""
1202 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1203 Perl_dump_sv_child(aTHX_ sv);
1209 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1213 /* Wait for up to 4 seconds for child to terminate.
1214 This seems to be the least effort way of timing out on reaping
1216 struct timeval waitfor = {4, 0};
1217 int sock = PL_dumper_fd;
1221 FD_SET(sock, &rset);
1222 select(sock + 1, &rset, NULL, NULL, &waitfor);
1223 waitpid(child, &status, WNOHANG);
1230 #ifdef PERL_DEBUG_READONLY_OPS
1236 #if defined(PERLIO_LAYERS)
1237 /* No more IO - including error messages ! */
1238 PerlIO_cleanup(aTHX);
1241 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1242 as currently layers use it rather than NULL as a marker
1243 for no arg - and will try and SvREFCNT_dec it.
1245 SvREFCNT(&PL_sv_undef) = 0;
1246 SvREADONLY_off(&PL_sv_undef);
1248 Safefree(PL_origfilename);
1249 PL_origfilename = NULL;
1250 Safefree(PL_reg_start_tmp);
1251 PL_reg_start_tmp = (char**)NULL;
1252 PL_reg_start_tmpl = 0;
1253 Safefree(PL_reg_curpm);
1254 Safefree(PL_reg_poscache);
1255 free_tied_hv_pool();
1256 Safefree(PL_op_mask);
1257 Safefree(PL_psig_ptr);
1258 PL_psig_ptr = (SV**)NULL;
1259 Safefree(PL_psig_name);
1260 PL_psig_name = (SV**)NULL;
1261 Safefree(PL_bitcount);
1263 Safefree(PL_psig_pend);
1264 PL_psig_pend = (int*)NULL;
1267 PL_tainting = FALSE;
1268 PL_taint_warn = FALSE;
1269 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1272 DEBUG_P(debprofdump());
1274 #ifdef USE_REENTRANT_API
1275 Perl_reentrant_free(aTHX);
1280 while (PL_regmatch_slab) {
1281 regmatch_slab *s = PL_regmatch_slab;
1282 PL_regmatch_slab = PL_regmatch_slab->next;
1286 /* As the absolutely last thing, free the non-arena SV for mess() */
1289 /* we know that type == SVt_PVMG */
1291 /* it could have accumulated taint magic */
1294 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1295 moremagic = mg->mg_moremagic;
1296 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1298 Safefree(mg->mg_ptr);
1302 /* we know that type >= SVt_PV */
1303 SvPV_free(PL_mess_sv);
1304 Safefree(SvANY(PL_mess_sv));
1305 Safefree(PL_mess_sv);
1312 =for apidoc perl_free
1314 Releases a Perl interpreter. See L<perlembed>.
1324 if (PL_veto_cleanup)
1327 #ifdef PERL_TRACK_MEMPOOL
1330 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1331 * value as we're probably hunting memory leaks then
1333 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1334 if (!s || atoi(s) == 0) {
1335 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1336 thread at thread exit. */
1337 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1338 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1343 #if defined(WIN32) || defined(NETWARE)
1344 # if defined(PERL_IMPLICIT_SYS)
1347 void *host = nw_internal_host;
1349 void *host = w32_internal_host;
1351 PerlMem_free(aTHXx);
1353 nw_delete_internal_host(host);
1355 win32_delete_internal_host(host);
1359 PerlMem_free(aTHXx);
1362 PerlMem_free(aTHXx);
1366 #if defined(USE_ITHREADS)
1367 /* provide destructors to clean up the thread key when libperl is unloaded */
1368 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1370 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1371 #pragma fini "perl_fini"
1372 #elif defined(__sun) && !defined(__GNUC__)
1373 #pragma fini (perl_fini)
1377 #if defined(__GNUC__)
1378 __attribute__((destructor))
1383 if (PL_curinterp && !PL_veto_cleanup)
1388 #endif /* THREADS */
1391 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1394 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1395 PL_exitlist[PL_exitlistlen].fn = fn;
1396 PL_exitlist[PL_exitlistlen].ptr = ptr;
1400 #ifdef HAS_PROCSELFEXE
1401 /* This is a function so that we don't hold on to MAXPATHLEN
1402 bytes of stack longer than necessary
1405 S_procself_val(pTHX_ SV *sv, const char *arg0)
1407 char buf[MAXPATHLEN];
1408 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1410 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1411 includes a spurious NUL which will cause $^X to fail in system
1412 or backticks (this will prevent extensions from being built and
1413 many tests from working). readlink is not meant to add a NUL.
1414 Normal readlink works fine.
1416 if (len > 0 && buf[len-1] == '\0') {
1420 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1421 returning the text "unknown" from the readlink rather than the path
1422 to the executable (or returning an error from the readlink). Any valid
1423 path has a '/' in it somewhere, so use that to validate the result.
1424 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1426 if (len > 0 && memchr(buf, '/', len)) {
1427 sv_setpvn(sv,buf,len);
1433 #endif /* HAS_PROCSELFEXE */
1436 S_set_caret_X(pTHX) {
1438 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1440 #ifdef HAS_PROCSELFEXE
1441 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1444 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1446 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1453 =for apidoc perl_parse
1455 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1461 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1468 PERL_UNUSED_ARG(my_perl);
1470 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1473 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1474 setuid perl scripts securely.\n");
1475 #endif /* IAMSUID */
1478 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1479 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1480 * This MUST be done before any hash stores or fetches take place.
1481 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1482 * yourself, it is your responsibility to provide a good random seed!
1483 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1484 if (!PL_rehash_seed_set)
1485 PL_rehash_seed = get_hash_seed();
1487 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1489 if (s && (atoi(s) == 1))
1490 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1492 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1497 if (PL_origalen != 0) {
1498 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1501 /* Set PL_origalen be the sum of the contiguous argv[]
1502 * elements plus the size of the env in case that it is
1503 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1504 * as the maximum modifiable length of $0. In the worst case
1505 * the area we are able to modify is limited to the size of
1506 * the original argv[0]. (See below for 'contiguous', though.)
1508 const char *s = NULL;
1511 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1512 /* Do the mask check only if the args seem like aligned. */
1514 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1516 /* See if all the arguments are contiguous in memory. Note
1517 * that 'contiguous' is a loose term because some platforms
1518 * align the argv[] and the envp[]. If the arguments look
1519 * like non-aligned, assume that they are 'strictly' or
1520 * 'traditionally' contiguous. If the arguments look like
1521 * aligned, we just check that they are within aligned
1522 * PTRSIZE bytes. As long as no system has something bizarre
1523 * like the argv[] interleaved with some other data, we are
1524 * fine. (Did I just evoke Murphy's Law?) --jhi */
1525 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1527 for (i = 1; i < PL_origargc; i++) {
1528 if ((PL_origargv[i] == s + 1
1530 || PL_origargv[i] == s + 2
1535 (PL_origargv[i] > s &&
1537 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1548 #ifndef PERL_USE_SAFE_PUTENV
1549 /* Can we grab env area too to be used as the area for $0? */
1550 if (s && PL_origenviron && !PL_use_safe_putenv) {
1551 if ((PL_origenviron[0] == s + 1)
1554 (PL_origenviron[0] > s &&
1555 PL_origenviron[0] <=
1556 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1559 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1560 s = PL_origenviron[0];
1563 my_setenv("NoNe SuCh", NULL);
1564 /* Force copy of environment. */
1565 for (i = 1; PL_origenviron[i]; i++) {
1566 if (PL_origenviron[i] == s + 1
1569 (PL_origenviron[i] > s &&
1570 PL_origenviron[i] <=
1571 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1574 s = PL_origenviron[i];
1582 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1584 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1589 /* Come here if running an undumped a.out. */
1591 PL_origfilename = savepv(argv[0]);
1592 PL_do_undump = FALSE;
1593 cxstack_ix = -1; /* start label stack again */
1595 assert (!PL_tainted);
1597 S_set_caret_X(aTHX);
1599 init_postdump_symbols(argc,argv,env);
1604 op_free(PL_main_root);
1605 PL_main_root = NULL;
1607 PL_main_start = NULL;
1608 SvREFCNT_dec(PL_main_cv);
1612 oldscope = PL_scopestack_ix;
1613 PL_dowarn = G_WARN_OFF;
1618 parse_body(env,xsinit);
1620 call_list(oldscope, PL_unitcheckav);
1622 call_list(oldscope, PL_checkav);
1629 /* my_exit() was called */
1630 while (PL_scopestack_ix > oldscope)
1633 PL_curstash = PL_defstash;
1635 call_list(oldscope, PL_unitcheckav);
1637 call_list(oldscope, PL_checkav);
1641 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1650 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1654 int argc = PL_origargc;
1655 char **argv = PL_origargv;
1656 const char *scriptname = NULL;
1657 VOL bool dosearch = FALSE;
1658 const char *validarg = "";
1660 register char *s, c;
1661 const char *cddir = NULL;
1662 #ifdef USE_SITECUSTOMIZE
1663 bool minus_f = FALSE;
1665 SV *linestr_sv = newSV_type(SVt_PVIV);
1666 bool add_read_e_script = FALSE;
1668 SvGROW(linestr_sv, 80);
1669 sv_setpvn(linestr_sv,"",0);
1671 sv = newSVpvs(""); /* first used for -I flags */
1675 for (argc--,argv++; argc > 0; argc--,argv++) {
1676 if (argv[0][0] != '-' || !argv[0][1])
1680 validarg = " PHOOEY ";
1684 * Can we rely on the kernel to start scripts with argv[1] set to
1685 * contain all #! line switches (the whole line)? (argv[0] is set to
1686 * the interpreter name, argv[2] to the script name; argv[3] and
1687 * above may contain other arguments.)
1694 #ifndef PERL_STRICT_CR
1718 if ((s = moreswitches(s)))
1723 CHECK_MALLOC_TOO_LATE_FOR('t');
1724 if( !PL_tainting ) {
1725 PL_taint_warn = TRUE;
1731 CHECK_MALLOC_TOO_LATE_FOR('T');
1733 PL_taint_warn = FALSE;
1741 #ifdef MACOS_TRADITIONAL
1742 /* ignore -e for Dev:Pseudo argument */
1743 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1746 forbid_setid('e', -1);
1748 PL_e_script = newSVpvs("");
1749 add_read_e_script = TRUE;
1752 sv_catpv(PL_e_script, s);
1754 sv_catpv(PL_e_script, argv[1]);
1758 Perl_croak(aTHX_ "No code specified for -%c", c);
1759 sv_catpvs(PL_e_script, "\n");
1763 #ifdef USE_SITECUSTOMIZE
1769 case 'I': /* -I handled both here and in moreswitches() */
1770 forbid_setid('I', -1);
1771 if (!*++s && (s=argv[1]) != NULL) {
1775 STRLEN len = strlen(s);
1776 const char * const p = savepvn(s, len);
1777 incpush(p, TRUE, TRUE, FALSE, FALSE);
1778 sv_catpvs(sv, "-I");
1779 sv_catpvn(sv, p, len);
1784 Perl_croak(aTHX_ "No directory specified for -I");
1787 forbid_setid('P', -1);
1788 PL_preprocess = TRUE;
1793 forbid_setid('S', -1);
1801 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1803 /* Can't do newSVpvs() as that would involve pre-processor
1804 condititionals inside a macro expansion. */
1805 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1812 # ifdef PERL_DONT_CREATE_GVSV
1813 " PERL_DONT_CREATE_GVSV"
1815 # ifdef PERL_MALLOC_WRAP
1818 # ifdef PERL_MEM_LOG
1821 # ifdef PERL_MEM_LOG_ENV
1824 # ifdef PERL_MEM_LOG_ENV_FD
1825 " PERL_MEM_LOG_ENV_FD"
1827 # ifdef PERL_MEM_LOG_STDERR
1828 " PERL_MEM_LOG_STDERR"
1830 # ifdef PERL_MEM_LOG_TIMESTAMP
1831 " PERL_MEM_LOG_TIMESTAMP"
1833 # ifdef PERL_USE_SAFE_PUTENV
1834 " PERL_USE_SAFE_PUTENV"
1836 # ifdef USE_SITECUSTOMIZE
1837 " USE_SITECUSTOMIZE"
1841 sv_catpv(opts_prog, PL_bincompat_options);
1842 /* Terminate the qw(, and then wrap at 76 columns. */
1843 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1845 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1847 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1850 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1852 #if defined(LOCAL_PATCH_COUNT)
1853 if (LOCAL_PATCH_COUNT > 0) {
1855 sv_catpvs(opts_prog,
1856 "\" Locally applied patches:\\n\",");
1857 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1858 if (PL_localpatches[i])
1859 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1860 0, PL_localpatches[i], 0);
1864 Perl_sv_catpvf(aTHX_ opts_prog,
1865 "\" Built under %s\\n",OSNAME);
1868 Perl_sv_catpvf(aTHX_ opts_prog,
1869 " Compiled at %s %s\\n\"",__DATE__,
1872 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1876 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1877 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1878 "sort grep {/^PERL/} keys %ENV; ");
1880 sv_catpvs(opts_prog,
1881 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1883 sv_catpvs(opts_prog,
1884 "print \" \\%ENV:\\n @env\\n\" if @env;"
1885 "print \" \\@INC:\\n @INC\\n\";");
1889 opts_prog = Perl_newSVpvf(aTHX_
1890 "Config::config_vars(qw%c%s%c)",
1894 av_push(PL_preambleav, opts_prog);
1895 /* don't look for script or read stdin */
1896 scriptname = BIT_BUCKET;
1900 PL_doextract = TRUE;
1908 if (!*++s || isSPACE(*s)) {
1912 /* catch use of gnu style long options */
1913 if (strEQ(s, "version")) {
1917 if (strEQ(s, "help")) {
1924 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1930 #ifndef SECURE_INTERNAL_GETENV
1933 (s = PerlEnv_getenv("PERL5OPT")))
1935 const char *popt = s;
1938 if (*s == '-' && *(s+1) == 'T') {
1939 CHECK_MALLOC_TOO_LATE_FOR('T');
1941 PL_taint_warn = FALSE;
1944 char *popt_copy = NULL;
1957 if (!strchr("CDIMUdmtwA", *s))
1958 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1962 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1963 s = popt_copy + (s - popt);
1964 d = popt_copy + (d - popt);
1971 if( !PL_tainting ) {
1972 PL_taint_warn = TRUE;
1982 #ifdef USE_SITECUSTOMIZE
1984 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1985 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
1990 scriptname = argv[0];
1993 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1995 else if (scriptname == NULL) {
1997 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2003 /* Set $^X early so that it can be used for relocatable paths in @INC */
2004 assert (!PL_tainted);
2006 S_set_caret_X(aTHX);
2013 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2015 validate_suid(validarg, scriptname, fdscript, suidscript,
2019 # if defined(SIGCHLD) || defined(SIGCLD)
2022 # define SIGCHLD SIGCLD
2024 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2025 if (sigstate == (Sighandler_t) SIG_IGN) {
2026 if (ckWARN(WARN_SIGNAL))
2027 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2028 "Can't ignore signal CHLD, forcing to default");
2029 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2036 #ifdef MACOS_TRADITIONAL
2037 || gMacPerl_AlwaysExtract
2041 /* This will croak if suidscript is >= 0, as -x cannot be used with
2043 forbid_setid('x', suidscript);
2044 /* Hence you can't get here if suidscript >= 0 */
2046 find_beginning(linestr_sv, rsfp);
2047 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2048 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2052 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2053 CvUNIQUE_on(PL_compcv);
2055 CvPADLIST(PL_compcv) = pad_new(0);
2057 PL_isarev = newHV();
2060 boot_core_UNIVERSAL();
2061 boot_core_xsutils();
2065 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2067 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2073 # ifdef HAS_SOCKS5_INIT
2074 socks5_init(argv[0]);
2080 init_predump_symbols();
2081 /* init_postdump_symbols not currently designed to be called */
2082 /* more than once (ENV isn't cleared first, for example) */
2083 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2085 init_postdump_symbols(argc,argv,env);
2087 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2088 * or explicitly in some platforms.
2089 * locale.c:Perl_init_i18nl10n() if the environment
2090 * look like the user wants to use UTF-8. */
2091 #if defined(__SYMBIAN32__)
2092 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2095 /* Requires init_predump_symbols(). */
2096 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2101 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2102 * and the default open disciplines. */
2103 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2104 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2106 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2107 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2108 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2110 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2111 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2112 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2114 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2115 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2116 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2118 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2119 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2122 sv_setpvn(sv, ":utf8\0:utf8", 11);
2124 sv_setpvn(sv, ":utf8\0", 6);
2127 sv_setpvn(sv, "\0:utf8", 6);
2133 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2134 if (strEQ(s, "unsafe"))
2135 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2136 else if (strEQ(s, "safe"))
2137 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2139 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2143 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2147 PL_xmlfp = PerlIO_stdout();
2149 PL_xmlfp = PerlIO_open(s, "w");
2151 Perl_croak(aTHX_ "Can't open %s", s);
2153 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2155 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2156 PL_madskills = atoi(s);
2157 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2161 lex_start(linestr_sv, rsfp, TRUE);
2162 PL_subname = newSVpvs("main");
2164 if (add_read_e_script)
2165 filter_add(read_e_script, NULL);
2167 /* now parse the script */
2169 SETERRNO(0,SS_NORMAL);
2170 #ifdef MACOS_TRADITIONAL
2171 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2173 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2175 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2176 MacPerl_MPWFileName(PL_origfilename));
2180 if (yyparse() || PL_parser->error_count) {
2182 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2184 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2189 CopLINE_set(PL_curcop, 0);
2190 PL_curstash = PL_defstash;
2191 PL_preprocess = FALSE;
2193 SvREFCNT_dec(PL_e_script);
2201 SAVECOPFILE(PL_curcop);
2202 SAVECOPLINE(PL_curcop);
2203 gv_check(PL_defstash);
2210 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2211 dump_mstats("after compilation:");
2220 =for apidoc perl_run
2222 Tells a Perl interpreter to run. See L<perlembed>.
2235 PERL_UNUSED_ARG(my_perl);
2237 oldscope = PL_scopestack_ix;
2245 cxstack_ix = -1; /* start context stack again */
2247 case 0: /* normal completion */
2251 case 2: /* my_exit() */
2252 while (PL_scopestack_ix > oldscope)
2255 PL_curstash = PL_defstash;
2256 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2257 PL_endav && !PL_minus_c)
2258 call_list(oldscope, PL_endav);
2260 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2261 dump_mstats("after execution: ");
2267 POPSTACK_TO(PL_mainstack);
2270 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2281 S_run_body(pTHX_ I32 oldscope)
2284 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2285 PL_sawampersand ? "Enabling" : "Omitting"));
2287 if (!PL_restartop) {
2291 exit(0); /* less likely to core dump than my_exit(0) */
2294 DEBUG_x(dump_all());
2297 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2299 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2303 #ifdef MACOS_TRADITIONAL
2304 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2305 (gMacPerl_ErrorFormat ? "# " : ""),
2306 MacPerl_MPWFileName(PL_origfilename));
2308 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2312 if (PERLDB_SINGLE && PL_DBsingle)
2313 sv_setiv(PL_DBsingle, 1);
2315 call_list(oldscope, PL_initav);
2316 #ifdef PERL_DEBUG_READONLY_OPS
2317 Perl_pending_Slabs_to_ro(aTHX);
2324 PL_op = PL_restartop;
2328 else if (PL_main_start) {
2329 CvDEPTH(PL_main_cv) = 1;
2330 PL_op = PL_main_start;
2338 =head1 SV Manipulation Functions
2340 =for apidoc p||get_sv
2342 Returns the SV of the specified Perl scalar. If C<create> is set and the
2343 Perl variable does not exist then it will be created. If C<create> is not
2344 set and the variable does not exist then NULL is returned.
2350 Perl_get_sv(pTHX_ const char *name, I32 create)
2353 gv = gv_fetchpv(name, create, SVt_PV);
2360 =head1 Array Manipulation Functions
2362 =for apidoc p||get_av
2364 Returns the AV of the specified Perl array. If C<create> is set and the
2365 Perl variable does not exist then it will be created. If C<create> is not
2366 set and the variable does not exist then NULL is returned.
2372 Perl_get_av(pTHX_ const char *name, I32 create)
2374 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2383 =head1 Hash Manipulation Functions
2385 =for apidoc p||get_hv
2387 Returns the HV of the specified Perl hash. If C<create> is set and the
2388 Perl variable does not exist then it will be created. If C<create> is not
2389 set and the variable does not exist then NULL is returned.
2395 Perl_get_hv(pTHX_ const char *name, I32 create)
2397 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2406 =head1 CV Manipulation Functions
2408 =for apidoc p||get_cvn_flags
2410 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2411 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2412 exist then it will be declared (which has the same effect as saying
2413 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2414 then NULL is returned.
2416 =for apidoc p||get_cv
2418 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2424 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2426 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2427 /* XXX this is probably not what they think they're getting.
2428 * It has the same effect as "sub name;", i.e. just a forward
2430 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2431 SV *const sv = newSVpvn(name,len);
2432 SvFLAGS(sv) |= flags & SVf_UTF8;
2433 return newSUB(start_subparse(FALSE, 0),
2434 newSVOP(OP_CONST, 0, sv),
2443 Perl_get_cv(pTHX_ const char *name, I32 flags)
2445 return get_cvn_flags(name, strlen(name), flags);
2448 /* Be sure to refetch the stack pointer after calling these routines. */
2452 =head1 Callback Functions
2454 =for apidoc p||call_argv
2456 Performs a callback to the specified Perl sub. See L<perlcall>.
2462 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2464 /* See G_* flags in cop.h */
2465 /* null terminated arg list */
2473 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2478 return call_pv(sub_name, flags);
2482 =for apidoc p||call_pv
2484 Performs a callback to the specified Perl sub. See L<perlcall>.
2490 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2491 /* name of the subroutine */
2492 /* See G_* flags in cop.h */
2494 return call_sv((SV*)get_cv(sub_name, TRUE), 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 */
2511 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2514 /* May be called with any of a CV, a GV, or an SV containing the name. */
2516 =for apidoc p||call_sv
2518 Performs a callback to the Perl sub whose name is in the SV. See
2525 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2526 /* See G_* flags in cop.h */
2529 LOGOP myop; /* fake syntax tree node */
2534 bool oldcatch = CATCH_GET;
2536 OP* const oldop = PL_op;
2539 if (flags & G_DISCARD) {
2544 Zero(&myop, 1, LOGOP);
2545 myop.op_next = NULL;
2546 if (!(flags & G_NOARGS))
2547 myop.op_flags |= OPf_STACKED;
2548 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2549 (flags & G_ARRAY) ? OPf_WANT_LIST :
2554 EXTEND(PL_stack_sp, 1);
2555 *++PL_stack_sp = sv;
2557 oldscope = PL_scopestack_ix;
2559 if (PERLDB_SUB && PL_curstash != PL_debstash
2560 /* Handle first BEGIN of -d. */
2561 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2562 /* Try harder, since this may have been a sighandler, thus
2563 * curstash may be meaningless. */
2564 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2565 && !(flags & G_NODEBUG))
2566 PL_op->op_private |= OPpENTERSUB_DB;
2568 if (flags & G_METHOD) {
2569 Zero(&method_op, 1, UNOP);
2570 method_op.op_next = PL_op;
2571 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2572 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2573 PL_op = (OP*)&method_op;
2576 if (!(flags & G_EVAL)) {
2578 CALL_BODY_SUB((OP*)&myop);
2579 retval = PL_stack_sp - (PL_stack_base + oldmark);
2580 CATCH_SET(oldcatch);
2583 myop.op_other = (OP*)&myop;
2585 create_eval_scope(flags|G_FAKINGEVAL);
2593 CALL_BODY_SUB((OP*)&myop);
2594 retval = PL_stack_sp - (PL_stack_base + oldmark);
2595 if (!(flags & G_KEEPERR))
2596 sv_setpvn(ERRSV,"",0);
2602 /* my_exit() was called */
2603 PL_curstash = PL_defstash;
2606 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2607 Perl_croak(aTHX_ "Callback called exit");
2612 PL_op = PL_restartop;
2616 PL_stack_sp = PL_stack_base + oldmark;
2617 if (flags & G_ARRAY)
2621 *++PL_stack_sp = &PL_sv_undef;
2626 if (PL_scopestack_ix > oldscope)
2627 delete_eval_scope();
2631 if (flags & G_DISCARD) {
2632 PL_stack_sp = PL_stack_base + oldmark;
2641 /* Eval a string. The G_EVAL flag is always assumed. */
2644 =for apidoc p||eval_sv
2646 Tells Perl to C<eval> the string in the SV.
2652 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2654 /* See G_* flags in cop.h */
2658 UNOP myop; /* fake syntax tree node */
2659 VOL I32 oldmark = SP - PL_stack_base;
2662 OP* const oldop = PL_op;
2665 if (flags & G_DISCARD) {
2672 Zero(PL_op, 1, UNOP);
2673 EXTEND(PL_stack_sp, 1);
2674 *++PL_stack_sp = sv;
2676 if (!(flags & G_NOARGS))
2677 myop.op_flags = OPf_STACKED;
2678 myop.op_next = NULL;
2679 myop.op_type = OP_ENTEREVAL;
2680 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2681 (flags & G_ARRAY) ? OPf_WANT_LIST :
2683 if (flags & G_KEEPERR)
2684 myop.op_flags |= OPf_SPECIAL;
2686 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2687 * before a PUSHEVAL, which corrupts the stack after a croak */
2688 TAINT_PROPER("eval_sv()");
2694 CALL_BODY_EVAL((OP*)&myop);
2695 retval = PL_stack_sp - (PL_stack_base + oldmark);
2696 if (!(flags & G_KEEPERR))
2697 sv_setpvn(ERRSV,"",0);
2703 /* my_exit() was called */
2704 PL_curstash = PL_defstash;
2707 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2708 Perl_croak(aTHX_ "Callback called exit");
2713 PL_op = PL_restartop;
2717 PL_stack_sp = PL_stack_base + oldmark;
2718 if (flags & G_ARRAY)
2722 *++PL_stack_sp = &PL_sv_undef;
2728 if (flags & G_DISCARD) {
2729 PL_stack_sp = PL_stack_base + oldmark;
2739 =for apidoc p||eval_pv
2741 Tells Perl to C<eval> the given string and return an SV* result.
2747 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2751 SV* sv = newSVpv(p, 0);
2753 eval_sv(sv, G_SCALAR);
2760 if (croak_on_error && SvTRUE(ERRSV)) {
2761 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2767 /* Require a module. */
2770 =head1 Embedding Functions
2772 =for apidoc p||require_pv
2774 Tells Perl to C<require> the file named by the string argument. It is
2775 analogous to the Perl code C<eval "require '$file'">. It's even
2776 implemented that way; consider using load_module instead.
2781 Perl_require_pv(pTHX_ const char *pv)
2786 PUSHSTACKi(PERLSI_REQUIRE);
2788 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2789 eval_sv(sv_2mortal(sv), G_DISCARD);
2795 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2797 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2800 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2804 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2806 /* This message really ought to be max 23 lines.
2807 * Removed -h because the user already knows that option. Others? */
2809 static const char * const usage_msg[] = {
2810 "-0[octal] specify record separator (\\0, if no argument)",
2811 "-a autosplit mode with -n or -p (splits $_ into @F)",
2812 "-C[number/list] enables the listed Unicode features",
2813 "-c check syntax only (runs BEGIN and CHECK blocks)",
2814 "-d[:debugger] run program under debugger",
2815 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2816 "-e program one line of program (several -e's allowed, omit programfile)",
2817 "-E program like -e, but enables all optional features",
2818 "-f don't do $sitelib/sitecustomize.pl at startup",
2819 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2820 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2821 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2822 "-l[octal] enable line ending processing, specifies line terminator",
2823 "-[mM][-]module execute \"use/no module...\" before executing program",
2824 "-n assume \"while (<>) { ... }\" loop around program",
2825 "-p assume loop like -n but print line also, like sed",
2826 "-P run program through C preprocessor before compilation",
2827 "-s enable rudimentary parsing for switches after programfile",
2828 "-S look for programfile using PATH environment variable",
2829 "-t enable tainting warnings",
2830 "-T enable tainting checks",
2831 "-u dump core after parsing program",
2832 "-U allow unsafe operations",
2833 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2834 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2835 "-w enable many useful warnings (RECOMMENDED)",
2836 "-W enable all warnings",
2837 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2838 "-X disable all warnings",
2842 const char * const *p = usage_msg;
2844 PerlIO_printf(PerlIO_stdout(),
2845 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2848 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2851 /* convert a string of -D options (or digits) into an int.
2852 * sets *s to point to the char after the options */
2856 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2858 static const char * const usage_msgd[] = {
2859 " Debugging flag values: (see also -d)",
2860 " p Tokenizing and parsing (with v, displays parse stack)",
2861 " s Stack snapshots (with v, displays all stacks)",
2862 " l Context (loop) stack processing",
2863 " t Trace execution",
2864 " o Method and overloading resolution",
2865 " c String/numeric conversions",
2866 " P Print profiling info, preprocessor command for -P, source file input state",
2867 " m Memory allocation",
2868 " f Format processing",
2869 " r Regular expression parsing and execution",
2870 " x Syntax tree dump",
2871 " u Tainting checks",
2872 " H Hash dump -- usurps values()",
2873 " X Scratchpad allocation",
2875 " S Thread synchronization",
2877 " R Include reference counts of dumped variables (eg when using -Ds)",
2878 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2879 " v Verbose: use in conjunction with other flags",
2881 " A Consistency checks on internal structures",
2882 " q quiet - currently only suppresses the 'EXECUTING' message",
2887 /* if adding extra options, remember to update DEBUG_MASK */
2888 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2890 for (; isALNUM(**s); (*s)++) {
2891 const char * const d = strchr(debopts,**s);
2893 i |= 1 << (d - debopts);
2894 else if (ckWARN_d(WARN_DEBUGGING))
2895 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2896 "invalid option -D%c, use -D'' to see choices\n", **s);
2899 else if (isDIGIT(**s)) {
2901 for (; isALNUM(**s); (*s)++) ;
2903 else if (givehelp) {
2904 const char *const *p = usage_msgd;
2905 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2908 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2909 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2910 "-Dp not implemented on this platform\n");
2916 /* This routine handles any switches that can be given during run */
2919 Perl_moreswitches(pTHX_ char *s)
2930 SvREFCNT_dec(PL_rs);
2931 if (s[1] == 'x' && s[2]) {
2932 const char *e = s+=2;
2938 flags = PERL_SCAN_SILENT_ILLDIGIT;
2939 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2940 if (s + numlen < e) {
2941 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2945 PL_rs = newSVpvs("");
2946 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2947 tmps = (U8*)SvPVX(PL_rs);
2948 uvchr_to_utf8(tmps, rschar);
2949 SvCUR_set(PL_rs, UNISKIP(rschar));
2954 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2955 if (rschar & ~((U8)~0))
2956 PL_rs = &PL_sv_undef;
2957 else if (!rschar && numlen >= 2)
2958 PL_rs = newSVpvs("");
2960 char ch = (char)rschar;
2961 PL_rs = newSVpvn(&ch, 1);
2964 sv_setsv(get_sv("/", TRUE), PL_rs);
2969 PL_unicode = parse_unicode_opts( (const char **)&s );
2970 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
2976 while (*s && !isSPACE(*s)) ++s;
2977 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
2988 forbid_setid('d', -1);
2991 /* -dt indicates to the debugger that threads will be used */
2992 if (*s == 't' && !isALNUM(s[1])) {
2994 my_setenv("PERL5DB_THREADED", "1");
2997 /* The following permits -d:Mod to accepts arguments following an =
2998 in the fashion that -MSome::Mod does. */
2999 if (*s == ':' || *s == '=') {
3001 SV * const sv = newSVpvs("use Devel::");
3003 /* We now allow -d:Module=Foo,Bar */
3004 while(isALNUM(*s) || *s==':') ++s;
3006 sv_catpv(sv, start);
3008 sv_catpvn(sv, start, s-start);
3009 /* Don't use NUL as q// delimiter here, this string goes in the
3011 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3014 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3017 PL_perldb = PERLDB_ALL;
3024 forbid_setid('D', -1);
3026 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3027 #else /* !DEBUGGING */
3028 if (ckWARN_d(WARN_DEBUGGING))
3029 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3030 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3031 for (s++; isALNUM(*s); s++) ;
3036 usage(PL_origargv[0]);
3039 Safefree(PL_inplace);
3040 #if defined(__CYGWIN__) /* do backup extension automagically */
3041 if (*(s+1) == '\0') {
3042 PL_inplace = savepvs(".bak");
3045 #endif /* __CYGWIN__ */
3047 const char * const start = ++s;
3048 while (*s && !isSPACE(*s))
3051 PL_inplace = savepvn(start, s - start);
3055 if (*s == '-') /* Additional switches on #! line. */
3059 case 'I': /* -I handled both here and in parse_body() */
3060 forbid_setid('I', -1);
3062 while (*s && isSPACE(*s))
3067 /* ignore trailing spaces (possibly followed by other switches) */
3069 for (e = p; *e && !isSPACE(*e); e++) ;
3073 } while (*p && *p != '-');
3074 e = savepvn(s, e-s);
3075 incpush(e, TRUE, TRUE, FALSE, FALSE);
3082 Perl_croak(aTHX_ "No directory specified for -I");
3088 SvREFCNT_dec(PL_ors_sv);
3094 PL_ors_sv = newSVpvs("\n");
3095 numlen = 3 + (*s == '0');
3096 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3100 if (RsPARA(PL_rs)) {
3101 PL_ors_sv = newSVpvs("\n\n");
3104 PL_ors_sv = newSVsv(PL_rs);
3109 forbid_setid('M', -1); /* XXX ? */
3112 forbid_setid('m', -1); /* XXX ? */
3116 const char *use = "use ";
3117 /* -M-foo == 'no foo' */
3118 /* Leading space on " no " is deliberate, to make both
3119 possibilities the same length. */
3120 if (*s == '-') { use = " no "; ++s; }
3121 sv = newSVpvn(use,4);
3123 /* We allow -M'Module qw(Foo Bar)' */
3124 while(isALNUM(*s) || *s==':') ++s;
3126 sv_catpv(sv, start);
3127 if (*(start-1) == 'm') {
3129 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3130 sv_catpvs( sv, " ()");
3134 Perl_croak(aTHX_ "Module name required with -%c option",
3136 sv_catpvn(sv, start, s-start);
3137 sv_catpvs(sv, " split(/,/,q");
3138 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3140 sv_catpvs(sv, "\0)");
3143 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3146 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3157 forbid_setid('s', -1);
3158 PL_doswitches = TRUE;
3172 #ifdef MACOS_TRADITIONAL
3173 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3175 PL_do_undump = TRUE;
3183 if (!sv_derived_from(PL_patchlevel, "version"))
3184 upg_version(PL_patchlevel, TRUE);
3186 PerlIO_printf(PerlIO_stdout(),
3187 Perl_form(aTHX_ "\nThis is perl, %"SVf
3188 #ifdef PERL_PATCHNUM
3189 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3192 SVfARG(vstringify(PL_patchlevel)),
3195 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3196 PerlIO_printf(PerlIO_stdout(),
3197 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3198 SVfARG(vstringify(PL_patchlevel))));
3199 PerlIO_printf(PerlIO_stdout(),
3200 Perl_form(aTHX_ " built under %s at %s %s\n",
3201 OSNAME, __DATE__, __TIME__));
3202 PerlIO_printf(PerlIO_stdout(),
3203 Perl_form(aTHX_ " OS Specific Release: %s\n",
3207 #if defined(LOCAL_PATCH_COUNT)
3208 if (LOCAL_PATCH_COUNT > 0)
3209 PerlIO_printf(PerlIO_stdout(),
3210 "\n(with %d registered patch%s, "
3211 "see perl -V for more detail)",
3213 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3216 PerlIO_printf(PerlIO_stdout(),
3217 "\n\nCopyright 1987-2007, Larry Wall\n");
3218 #ifdef MACOS_TRADITIONAL
3219 PerlIO_printf(PerlIO_stdout(),
3220 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3221 "maintained by Chris Nandor\n");
3224 PerlIO_printf(PerlIO_stdout(),
3225 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3228 PerlIO_printf(PerlIO_stdout(),
3229 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3230 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3233 PerlIO_printf(PerlIO_stdout(),
3234 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3235 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3238 PerlIO_printf(PerlIO_stdout(),
3239 "atariST series port, ++jrb bammi@cadence.com\n");
3242 PerlIO_printf(PerlIO_stdout(),
3243 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3246 PerlIO_printf(PerlIO_stdout(),
3247 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3250 PerlIO_printf(PerlIO_stdout(),
3251 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3254 PerlIO_printf(PerlIO_stdout(),
3255 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3262 PerlIO_printf(PerlIO_stdout(),
3263 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "MiNT port by Guido Flohr, 1997-1999\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "EPOC port by Olaf Flebbe, 1999-2002\n");
3274 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3275 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3278 #ifdef __SYMBIAN32__
3279 PerlIO_printf(PerlIO_stdout(),
3280 "Symbian port by Nokia, 2004-2005\n");
3282 #ifdef BINARY_BUILD_NOTICE
3283 BINARY_BUILD_NOTICE;
3285 PerlIO_printf(PerlIO_stdout(),
3287 Perl may be copied only under the terms of either the Artistic License or the\n\
3288 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3289 Complete documentation for Perl, including FAQ lists, should be found on\n\
3290 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3291 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3294 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3295 PL_dowarn |= G_WARN_ON;
3300 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3301 if (!specialWARN(PL_compiling.cop_warnings))
3302 PerlMemShared_free(PL_compiling.cop_warnings);
3303 PL_compiling.cop_warnings = pWARN_ALL ;
3307 PL_dowarn = G_WARN_ALL_OFF;
3308 if (!specialWARN(PL_compiling.cop_warnings))
3309 PerlMemShared_free(PL_compiling.cop_warnings);
3310 PL_compiling.cop_warnings = pWARN_NONE ;
3315 if (s[1] == '-') /* Additional switches on #! line. */
3320 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3326 #ifdef ALTERNATE_SHEBANG
3327 case 'S': /* OS/2 needs -S on "extproc" line. */
3335 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3340 /* compliments of Tom Christiansen */
3342 /* unexec() can be found in the Gnu emacs distribution */
3343 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3346 Perl_my_unexec(pTHX)
3348 PERL_UNUSED_CONTEXT;
3350 SV * prog = newSVpv(BIN_EXP, 0);
3351 SV * file = newSVpv(PL_origfilename, 0);
3355 sv_catpvs(prog, "/perl");
3356 sv_catpvs(file, ".perldump");
3358 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3359 /* unexec prints msg to stderr in case of failure */
3360 PerlProc_exit(status);
3363 # include <lib$routines.h>
3364 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3365 # elif defined(WIN32) || defined(__CYGWIN__)
3366 Perl_croak(aTHX_ "dump is not supported");
3368 ABORT(); /* for use with undump */
3373 /* initialize curinterp */
3379 # define PERLVAR(var,type)
3380 # define PERLVARA(var,n,type)
3381 # if defined(PERL_IMPLICIT_CONTEXT)
3382 # define PERLVARI(var,type,init) aTHX->var = init;
3383 # define PERLVARIC(var,type,init) aTHX->var = init;
3385 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3386 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3388 # include "intrpvar.h"
3394 # define PERLVAR(var,type)
3395 # define PERLVARA(var,n,type)
3396 # define PERLVARI(var,type,init) PL_##var = init;
3397 # define PERLVARIC(var,type,init) PL_##var = init;
3398 # include "intrpvar.h"
3405 /* As these are inside a structure, PERLVARI isn't capable of initialising
3407 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3408 PL_reg_poscache = PL_reg_starttry = NULL;
3412 S_init_main_stash(pTHX)
3417 PL_curstash = PL_defstash = newHV();
3418 /* We know that the string "main" will be in the global shared string
3419 table, so it's a small saving to use it rather than allocate another
3421 PL_curstname = newSVpvs_share("main");
3422 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3423 /* If we hadn't caused another reference to "main" to be in the shared
3424 string table above, then it would be worth reordering these two,
3425 because otherwise all we do is delete "main" from it as a consequence
3426 of the SvREFCNT_dec, only to add it again with hv_name_set */
3427 SvREFCNT_dec(GvHV(gv));
3428 hv_name_set(PL_defstash, "main", 4, 0);
3429 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3431 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3433 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3434 GvMULTI_on(PL_incgv);
3435 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3436 GvMULTI_on(PL_hintgv);
3437 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3438 SvREFCNT_inc_simple_void(PL_defgv);
3439 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3440 SvREFCNT_inc_simple_void(PL_errgv);
3441 GvMULTI_on(PL_errgv);
3442 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3443 GvMULTI_on(PL_replgv);
3444 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3445 #ifdef PERL_DONT_CREATE_GVSV
3448 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3449 sv_setpvn(ERRSV, "", 0);
3450 PL_curstash = PL_defstash;
3451 CopSTASH_set(&PL_compiling, PL_defstash);
3452 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3453 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3455 /* We must init $/ before switches are processed. */
3456 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3460 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3461 int *suidscript, PerlIO **rsfpp)
3466 const char *cpp_discard_flag;
3475 PL_origfilename = savepvs("-e");
3478 /* if find_script() returns, it returns a malloc()-ed value */
3479 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3481 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3482 const char *s = scriptname + 8;
3488 * Tell apart "normal" usage of fdscript, e.g.
3489 * with bash on FreeBSD:
3490 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3491 * from usage in suidperl.
3492 * Does any "normal" usage leave garbage after the number???
3493 * Is it a mistake to use a similar /dev/fd/ construct for
3498 * Be supersafe and do some sanity-checks.
3499 * Still, can we be sure we got the right thing?
3502 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3505 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3507 scriptname = savepv(s + 1);
3508 Safefree(PL_origfilename);
3509 PL_origfilename = (char *)scriptname;
3514 CopFILE_free(PL_curcop);
3515 CopFILE_set(PL_curcop, PL_origfilename);
3516 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3517 scriptname = (char *)"";
3518 if (fdscript >= 0) {
3519 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3520 # if defined(HAS_FCNTL) && defined(F_SETFD)
3522 /* ensure close-on-exec */
3523 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3528 Perl_croak(aTHX_ "sperl needs fd script\n"
3529 "You should not call sperl directly; do you need to "
3530 "change a #! line\nfrom sperl to perl?\n");
3533 * Do not open (or do other fancy stuff) while setuid.
3534 * Perl does the open, and hands script to suidperl on a fd;
3535 * suidperl only does some checks, sets up UIDs and re-execs
3536 * perl with that fd as it has always done.
3539 if (*suidscript != 1) {
3540 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3543 else if (PL_preprocess) {
3544 const char * const cpp_cfg = CPPSTDIN;
3545 SV * const cpp = newSVpvs("");
3546 SV * const cmd = newSV(0);
3548 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3549 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3550 if (strEQ(cpp_cfg, "cppstdin"))
3551 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3552 sv_catpv(cpp, cpp_cfg);
3555 sv_catpvs(sv, "-I");
3556 sv_catpv(sv,PRIVLIB_EXP);
3559 DEBUG_P(PerlIO_printf(Perl_debug_log,
3560 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3561 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3564 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3571 cpp_discard_flag = "";
3573 cpp_discard_flag = "-C";
3577 perl = os2_execname(aTHX);
3579 perl = PL_origargv[0];
3583 /* This strips off Perl comments which might interfere with
3584 the C pre-processor, including #!. #line directives are
3585 deliberately stripped to avoid confusion with Perl's version
3586 of #line. FWP played some golf with it so it will fit
3587 into VMS's 255 character buffer.
3590 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3592 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3594 Perl_sv_setpvf(aTHX_ cmd, "\
3595 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3596 perl, quote, code, quote, scriptname, SVfARG(cpp),
3597 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3599 PL_doextract = FALSE;
3601 DEBUG_P(PerlIO_printf(Perl_debug_log,
3602 "PL_preprocess: cmd=\"%s\"\n",
3605 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3609 else if (!*scriptname) {
3610 forbid_setid(0, *suidscript);
3611 *rsfpp = PerlIO_stdin();
3614 #ifdef FAKE_BIT_BUCKET
3615 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3616 * is called) and still have the "-e" work. (Believe it or not,
3617 * a /dev/null is required for the "-e" to work because source
3618 * filter magic is used to implement it. ) This is *not* a general
3619 * replacement for a /dev/null. What we do here is create a temp
3620 * file (an empty file), open up that as the script, and then
3621 * immediately close and unlink it. Close enough for jazz. */
3622 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3623 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3624 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3625 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3626 FAKE_BIT_BUCKET_TEMPLATE
3628 const char * const err = "Failed to create a fake bit bucket";
3629 if (strEQ(scriptname, BIT_BUCKET)) {
3630 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3631 int tmpfd = mkstemp(tmpname);
3633 scriptname = tmpname;
3636 Perl_croak(aTHX_ err);
3639 scriptname = mktemp(tmpname);
3641 Perl_croak(aTHX_ err);
3646 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3647 #ifdef FAKE_BIT_BUCKET
3648 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3649 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3650 && strlen(scriptname) == sizeof(tmpname) - 1) {
3653 scriptname = BIT_BUCKET;
3655 # if defined(HAS_FCNTL) && defined(F_SETFD)
3657 /* ensure close-on-exec */
3658 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3661 #endif /* IAMSUID */
3663 /* PSz 16 Sep 03 Keep neat error message */
3665 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3667 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3668 CopFILE(PL_curcop), Strerror(errno));
3674 * I_SYSSTATVFS HAS_FSTATVFS
3676 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3677 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3678 * here so that metaconfig picks them up. */
3682 S_fd_on_nosuid_fs(pTHX_ int fd)
3685 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3686 * but is needed also on machines without setreuid.
3687 * Seems safe enough to run as root.
3689 int check_okay = 0; /* able to do all the required sys/libcalls */
3690 int on_nosuid = 0; /* the fd is on a nosuid fs */
3692 * Need to check noexec also: nosuid might not be set, the average
3693 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3695 int on_noexec = 0; /* the fd is on a noexec fs */
3698 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3699 * fstatvfs() is UNIX98.
3700 * fstatfs() is 4.3 BSD.
3701 * ustat()+getmnt() is pre-4.3 BSD.
3702 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3703 * an irrelevant filesystem while trying to reach the right one.
3706 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3708 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3709 defined(HAS_FSTATVFS)
3710 # define FD_ON_NOSUID_CHECK_OKAY
3711 struct statvfs stfs;
3713 check_okay = fstatvfs(fd, &stfs) == 0;
3714 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3716 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3717 on platforms where it is present. */
3718 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3720 # endif /* fstatvfs */
3722 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3723 defined(PERL_MOUNT_NOSUID) && \
3724 defined(PERL_MOUNT_NOEXEC) && \
3725 defined(HAS_FSTATFS) && \
3726 defined(HAS_STRUCT_STATFS) && \
3727 defined(HAS_STRUCT_STATFS_F_FLAGS)
3728 # define FD_ON_NOSUID_CHECK_OKAY
3731 check_okay = fstatfs(fd, &stfs) == 0;
3732 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3733 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3734 # endif /* fstatfs */
3736 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3737 defined(PERL_MOUNT_NOSUID) && \
3738 defined(PERL_MOUNT_NOEXEC) && \
3739 defined(HAS_FSTAT) && \
3740 defined(HAS_USTAT) && \
3741 defined(HAS_GETMNT) && \
3742 defined(HAS_STRUCT_FS_DATA) && \
3744 # define FD_ON_NOSUID_CHECK_OKAY
3747 if (fstat(fd, &fdst) == 0) {
3749 if (ustat(fdst.st_dev, &us) == 0) {
3751 /* NOSTAT_ONE here because we're not examining fields which
3752 * vary between that case and STAT_ONE. */
3753 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3754 size_t cmplen = sizeof(us.f_fname);
3755 if (sizeof(fsd.fd_req.path) < cmplen)
3756 cmplen = sizeof(fsd.fd_req.path);
3757 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3758 fdst.st_dev == fsd.fd_req.dev) {
3760 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3761 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3766 # endif /* fstat+ustat+getmnt */
3768 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3769 defined(HAS_GETMNTENT) && \
3770 defined(HAS_HASMNTOPT) && \
3771 defined(MNTOPT_NOSUID) && \
3772 defined(MNTOPT_NOEXEC)
3773 # define FD_ON_NOSUID_CHECK_OKAY
3774 FILE *mtab = fopen("/etc/mtab", "r");
3775 struct mntent *entry;
3778 if (mtab && (fstat(fd, &stb) == 0)) {
3779 while (entry = getmntent(mtab)) {
3780 if (stat(entry->mnt_dir, &fsb) == 0
3781 && fsb.st_dev == stb.st_dev)
3783 /* found the filesystem */
3785 if (hasmntopt(entry, MNTOPT_NOSUID))
3787 if (hasmntopt(entry, MNTOPT_NOEXEC))
3790 } /* A single fs may well fail its stat(). */
3795 # endif /* getmntent+hasmntopt */
3798 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3800 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3802 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3803 return ((!check_okay) || on_nosuid || on_noexec);
3805 #endif /* IAMSUID */
3808 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3809 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3814 #endif /* IAMSUID */
3816 /* do we need to emulate setuid on scripts? */
3818 /* This code is for those BSD systems that have setuid #! scripts disabled
3819 * in the kernel because of a security problem. Merely defining DOSUID
3820 * in perl will not fix that problem, but if you have disabled setuid
3821 * scripts in the kernel, this will attempt to emulate setuid and setgid
3822 * on scripts that have those now-otherwise-useless bits set. The setuid
3823 * root version must be called suidperl or sperlN.NNN. If regular perl
3824 * discovers that it has opened a setuid script, it calls suidperl with
3825 * the same argv that it had. If suidperl finds that the script it has
3826 * just opened is NOT setuid root, it sets the effective uid back to the
3827 * uid. We don't just make perl setuid root because that loses the
3828 * effective uid we had before invoking perl, if it was different from the
3831 * Description/comments above do not match current workings:
3832 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3833 * suidperl called with script open and name changed to /dev/fd/N/X;
3834 * suidperl croaks if script is not setuid;
3835 * making perl setuid would be a huge security risk (and yes, that
3836 * would lose any euid we might have had).
3838 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3839 * be defined in suidperl only. suidperl must be setuid root. The
3840 * Configure script will set this up for you if you want it.
3846 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3847 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3848 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3850 const char *linestr;
3854 if (fdscript < 0 || suidscript != 1)
3855 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3857 * Since the script is opened by perl, not suidperl, some of these
3858 * checks are superfluous. Leaving them in probably does not lower
3862 * Do checks even for systems with no HAS_SETREUID.
3863 * We used to swap, then re-swap UIDs with
3864 # ifdef HAS_SETREUID
3865 if (setreuid(PL_euid,PL_uid) < 0
3866 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3867 Perl_croak(aTHX_ "Can't swap uid and euid");
3869 # ifdef HAS_SETREUID
3870 if (setreuid(PL_uid,PL_euid) < 0
3871 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3872 Perl_croak(aTHX_ "Can't reswap uid and euid");
3876 /* On this access check to make sure the directories are readable,
3877 * there is actually a small window that the user could use to make
3878 * filename point to an accessible directory. So there is a faint
3879 * chance that someone could execute a setuid script down in a
3880 * non-accessible directory. I don't know what to do about that.
3881 * But I don't think it's too important. The manual lies when
3882 * it says access() is useful in setuid programs.
3884 * So, access() is pretty useless... but not harmful... do anyway.
3886 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3887 Perl_croak(aTHX_ "Can't access() script\n");
3890 /* If we can swap euid and uid, then we can determine access rights
3891 * with a simple stat of the file, and then compare device and
3892 * inode to make sure we did stat() on the same file we opened.
3893 * Then we just have to make sure he or she can execute it.
3896 * As the script is opened by perl, not suidperl, we do not need to
3897 * care much about access rights.
3899 * The 'script changed' check is needed, or we can get lied to
3900 * about $0 with e.g.
3901 * suidperl /dev/fd/4//bin/x 4<setuidscript
3902 * Without HAS_SETREUID, is it safe to stat() as root?
3904 * Are there any operating systems that pass /dev/fd/xxx for setuid
3905 * scripts, as suggested/described in perlsec(1)? Surely they do not
3906 * pass the script name as we do, so the "script changed" test would
3907 * fail for them... but we never get here with
3908 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3910 * This is one place where we must "lie" about return status: not
3911 * say if the stat() failed. We are doing this as root, and could
3912 * be tricked into reporting existence or not of files that the
3913 * "plain" user cannot even see.
3917 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3918 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3919 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3920 Perl_croak(aTHX_ "Setuid script changed\n");
3924 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3925 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3928 * We used to do this check as the "plain" user (after swapping
3929 * UIDs). But the check for nosuid and noexec filesystem is needed,
3930 * and should be done even without HAS_SETREUID. (Maybe those
3931 * operating systems do not have such mount options anyway...)
3932 * Seems safe enough to do as root.
3934 # if !defined(NO_NOSUID_CHECK)
3935 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3936 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3939 # endif /* IAMSUID */
3941 if (!S_ISREG(PL_statbuf.st_mode)) {
3942 Perl_croak(aTHX_ "Setuid script not plain file\n");
3944 if (PL_statbuf.st_mode & S_IWOTH)
3945 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3946 PL_doswitches = FALSE; /* -s is insecure in suid */
3947 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3948 CopLINE_inc(PL_curcop);
3949 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3950 Perl_croak(aTHX_ "No #! line");
3951 linestr = SvPV_nolen_const(linestr_sv);
3952 /* required even on Sys V */
3953 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3954 Perl_croak(aTHX_ "No #! line");
3958 /* Sanity check on line length */
3959 s_end = s + strlen(s);
3960 if (s_end == s || (s_end - s) > 4000)
3961 Perl_croak(aTHX_ "Very long #! line");
3962 /* Allow more than a single space after #! */
3963 while (isSPACE(*s)) s++;
3964 /* Sanity check on buffer end */
3965 while ((*s) && !isSPACE(*s)) s++;
3966 for (s2 = s; (s2 > linestr &&
3967 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3968 || s2[-1] == '-')); s2--) ;
3969 /* Sanity check on buffer start */
3970 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3971 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3972 Perl_croak(aTHX_ "Not a perl script");
3973 while (*s == ' ' || *s == '\t') s++;
3975 * #! arg must be what we saw above. They can invoke it by
3976 * mentioning suidperl explicitly, but they may not add any strange
3977 * arguments beyond what #! says if they do invoke suidperl that way.
3980 * The way validarg was set up, we rely on the kernel to start
3981 * scripts with argv[1] set to contain all #! line switches (the
3985 * Check that we got all the arguments listed in the #! line (not
3986 * just that there are no extraneous arguments). Might not matter
3987 * much, as switches from #! line seem to be acted upon (also), and
3988 * so may be checked and trapped in perl. But, security checks must
3989 * be done in suidperl and not deferred to perl. Note that suidperl
3990 * does not get around to parsing (and checking) the switches on
3991 * the #! line (but execs perl sooner).
3992 * Allow (require) a trailing newline (which may be of two
3993 * characters on some architectures?) (but no other trailing
3996 len = strlen(validarg);
3997 if (strEQ(validarg," PHOOEY ") ||
3998 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3999 !((s_end - s) == len+1
4000 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4001 Perl_croak(aTHX_ "Args must match #! line");
4005 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4006 PL_euid == PL_statbuf.st_uid)
4008 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4009 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4010 # endif /* IAMSUID */
4013 PL_euid) { /* oops, we're not the setuid root perl */
4015 * When root runs a setuid script, we do not go through the same
4016 * steps of execing sperl and then perl with fd scripts, but
4017 * simply set up UIDs within the same perl invocation; so do
4018 * not have the same checks (on options, whatever) that we have
4019 * for plain users. No problem really: would have to be a script
4020 * that does not actually work for plain users; and if root is
4021 * foolish and can be persuaded to run such an unsafe script, he
4022 * might run also non-setuid ones, and deserves what he gets.
4024 * Or, we might drop the PL_euid check above (and rely just on
4025 * fdscript to avoid loops), and do the execs
4031 * Pass fd script to suidperl.
4032 * Exec suidperl, substituting fd script for scriptname.
4033 * Pass script name as "subdir" of fd, which perl will grok;
4034 * in fact will use that to distinguish this from "normal"
4035 * usage, see comments above.
4037 PerlIO_rewind(rsfp);
4038 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4039 /* PSz 27 Feb 04 Sanity checks on scriptname */
4040 if ((!scriptname) || (!*scriptname) ) {
4041 Perl_croak(aTHX_ "No setuid script name\n");
4043 if (*scriptname == '-') {
4044 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4045 /* Or we might confuse it with an option when replacing
4046 * name in argument list, below (though we do pointer, not
4047 * string, comparisons).
4050 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4051 if (!PL_origargv[which]) {
4052 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4054 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4055 PerlIO_fileno(rsfp), PL_origargv[which]));
4056 # if defined(HAS_FCNTL) && defined(F_SETFD)
4057 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4060 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4061 (int)PERL_REVISION, (int)PERL_VERSION,
4062 (int)PERL_SUBVERSION), PL_origargv);
4064 # endif /* IAMSUID */
4065 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4068 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4070 * This seems back to front: we try HAS_SETEGID first; if not available
4071 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4072 * in the sense that we only want to set EGID; but are there any machines
4073 * with either of the latter, but not the former? Same with UID, later.
4076 (void)setegid(PL_statbuf.st_gid);
4078 # ifdef HAS_SETREGID
4079 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4081 # ifdef HAS_SETRESGID
4082 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4084 PerlProc_setgid(PL_statbuf.st_gid);
4088 if (PerlProc_getegid() != PL_statbuf.st_gid)
4089 Perl_croak(aTHX_ "Can't do setegid!\n");
4091 if (PL_statbuf.st_mode & S_ISUID) {
4092 if (PL_statbuf.st_uid != PL_euid)
4094 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4096 # ifdef HAS_SETREUID
4097 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4099 # ifdef HAS_SETRESUID
4100 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4102 PerlProc_setuid(PL_statbuf.st_uid);
4106 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4107 Perl_croak(aTHX_ "Can't do seteuid!\n");
4109 else if (PL_uid) { /* oops, mustn't run as root */
4111 (void)seteuid((Uid_t)PL_uid);
4113 # ifdef HAS_SETREUID
4114 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4116 # ifdef HAS_SETRESUID
4117 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4119 PerlProc_setuid((Uid_t)PL_uid);
4123 if (PerlProc_geteuid() != PL_uid)
4124 Perl_croak(aTHX_ "Can't do seteuid!\n");
4127 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4128 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4131 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4132 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4133 else if (fdscript < 0 || suidscript != 1)
4134 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4135 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4137 /* PSz 16 Sep 03 Keep neat error message */
4138 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4141 /* We absolutely must clear out any saved ids here, so we */
4142 /* exec the real perl, substituting fd script for scriptname. */
4143 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4145 * It might be thought that using setresgid and/or setresuid (changed to
4146 * set the saved IDs) above might obviate the need to exec, and we could
4147 * go on to "do the perl thing".
4149 * Is there such a thing as "saved GID", and is that set for setuid (but
4150 * not setgid) execution like suidperl? Without exec, it would not be
4151 * cleared for setuid (but not setgid) scripts (or might need a dummy
4154 * We need suidperl to do the exact same argument checking that perl
4155 * does. Thus it cannot be very small; while it could be significantly
4156 * smaller, it is safer (simpler?) to make it essentially the same
4157 * binary as perl (but they are not identical). - Maybe could defer that
4158 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4159 * but prefer to do thorough checks in suidperl itself. Such deferral
4160 * would make suidperl security rely on perl, a design no-no.
4162 * Setuid things should be short and simple, thus easy to understand and
4163 * verify. They should do their "own thing", without influence by
4164 * attackers. It may help if their internal execution flow is fixed,
4165 * regardless of platform: it may be best to exec anyway.
4167 * Suidperl should at least be conceptually simple: a wrapper only,
4168 * never to do any real perl. Maybe we should put
4170 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4172 * into the perly bits.
4174 PerlIO_rewind(rsfp);
4175 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4177 * Keep original arguments: suidperl already has fd script.
4179 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4180 /* if (!PL_origargv[which]) { */
4181 /* errno = EPERM; */
4182 /* Perl_croak(aTHX_ "Permission denied\n"); */
4184 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4185 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4186 # if defined(HAS_FCNTL) && defined(F_SETFD)
4187 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4190 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4191 (int)PERL_REVISION, (int)PERL_VERSION,
4192 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4194 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4195 # endif /* IAMSUID */
4197 PERL_UNUSED_ARG(fdscript);
4198 PERL_UNUSED_ARG(suidscript);
4199 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4200 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4201 PERL_UNUSED_ARG(rsfp);
4203 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4204 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4206 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4209 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4210 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4211 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4212 /* not set-id, must be wrapped */
4215 PERL_UNUSED_ARG(validarg);
4216 PERL_UNUSED_ARG(scriptname);
4217 PERL_UNUSED_ARG(linestr_sv);
4221 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4225 register const char *s2;
4226 #ifdef MACOS_TRADITIONAL
4230 /* skip forward in input to the real script? */
4232 #ifdef MACOS_TRADITIONAL
4233 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4235 while (PL_doextract || gMacPerl_AlwaysExtract) {
4236 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4237 if (!gMacPerl_AlwaysExtract)
4238 Perl_croak(aTHX_ "No Perl script found in input\n");
4240 if (PL_doextract) /* require explicit override ? */
4241 if (!OverrideExtract(PL_origfilename))
4242 Perl_croak(aTHX_ "User aborted script\n");
4244 PL_doextract = FALSE;
4246 /* Pater peccavi, file does not have #! */
4247 PerlIO_rewind(rsfp);
4252 while (PL_doextract) {
4253 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4254 Perl_croak(aTHX_ "No Perl script found in input\n");
4257 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4258 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4259 PL_doextract = FALSE;
4260 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4262 while (*s == ' ' || *s == '\t') s++;
4264 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4265 || s2[-1] == '_') s2--;
4266 if (strnEQ(s2-4,"perl",4))
4267 while ((s = moreswitches(s)))
4270 #ifdef MACOS_TRADITIONAL
4271 /* We are always searching for the #!perl line in MacPerl,
4272 * so if we find it, still keep the line count correct
4273 * by counting lines we already skipped over
4275 for (; maclines > 0 ; maclines--)
4276 PerlIO_ungetc(rsfp, '\n');
4280 /* gMacPerl_AlwaysExtract is false in MPW tool */
4281 } else if (gMacPerl_AlwaysExtract) {
4293 PL_uid = PerlProc_getuid();
4294 PL_euid = PerlProc_geteuid();
4295 PL_gid = PerlProc_getgid();
4296 PL_egid = PerlProc_getegid();
4298 PL_uid |= PL_gid << 16;
4299 PL_euid |= PL_egid << 16;
4301 /* Should not happen: */
4302 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4303 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4306 * Should go by suidscript, not uid!=euid: why disallow
4307 * system("ls") in scripts run from setuid things?
4308 * Or, is this run before we check arguments and set suidscript?
4309 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4310 * (We never have suidscript, can we be sure to have fdscript?)
4311 * Or must then go by UID checks? See comments in forbid_setid also.
4315 /* This is used very early in the lifetime of the program,
4316 * before even the options are parsed, so PL_tainting has
4317 * not been initialized properly. */
4319 Perl_doing_taint(int argc, char *argv[], char *envp[])
4321 #ifndef PERL_IMPLICIT_SYS
4322 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4323 * before we have an interpreter-- and the whole point of this
4324 * function is to be called at such an early stage. If you are on
4325 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4326 * "tainted because running with altered effective ids', you'll
4327 * have to add your own checks somewhere in here. The two most
4328 * known samples of 'implicitness' are Win32 and NetWare, neither
4329 * of which has much of concept of 'uids'. */
4330 int uid = PerlProc_getuid();
4331 int euid = PerlProc_geteuid();
4332 int gid = PerlProc_getgid();
4333 int egid = PerlProc_getegid();
4340 if (uid && (euid != uid || egid != gid))
4342 #endif /* !PERL_IMPLICIT_SYS */
4343 /* This is a really primitive check; environment gets ignored only
4344 * if -T are the first chars together; otherwise one gets
4345 * "Too late" message. */
4346 if ( argc > 1 && argv[1][0] == '-'
4347 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4352 /* Passing the flag as a single char rather than a string is a slight space
4353 optimisation. The only message that isn't /^-.$/ is
4354 "program input from stdin", which is substituted in place of '\0', which
4355 could never be a command line flag. */
4357 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4360 char string[3] = "-x";
4361 const char *message = "program input from stdin";
4368 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4369 if (PL_euid != PL_uid)
4370 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4371 if (PL_egid != PL_gid)
4372 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4373 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4375 * Checks for UID/GID above "wrong": why disallow
4376 * perl -e 'print "Hello\n"'
4377 * from within setuid things?? Simply drop them: replaced by
4378 * fdscript/suidscript and #ifdef IAMSUID checks below.
4380 * This may be too late for command-line switches. Will catch those on
4381 * the #! line, after finding the script name and setting up
4382 * fdscript/suidscript. Note that suidperl does not get around to
4383 * parsing (and checking) the switches on the #! line, but checks that
4384 * the two sets are identical.
4386 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4387 * instead, or would that be "too late"? (We never have suidscript, can
4388 * we be sure to have fdscript?)
4390 * Catch things with suidscript (in descendant of suidperl), even with
4391 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4392 * below; but I am paranoid.
4394 * Also see comments about root running a setuid script, elsewhere.
4396 if (suidscript >= 0)
4397 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4399 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4400 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4401 #endif /* IAMSUID */
4405 Perl_init_debugger(pTHX)
4408 HV * const ostash = PL_curstash;
4410 PL_curstash = PL_debstash;
4411 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4413 AvREAL_off(PL_dbargs);
4414 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4415 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4416 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4417 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4418 sv_setiv(PL_DBsingle, 0);
4419 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4420 sv_setiv(PL_DBtrace, 0);
4421 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4422 sv_setiv(PL_DBsignal, 0);
4423 PL_curstash = ostash;
4426 #ifndef STRESS_REALLOC
4427 #define REASONABLE(size) (size)
4429 #define REASONABLE(size) (1) /* unreasonable */
4433 Perl_init_stacks(pTHX)
4436 /* start with 128-item stack and 8K cxstack */
4437 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4438 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4439 PL_curstackinfo->si_type = PERLSI_MAIN;
4440 PL_curstack = PL_curstackinfo->si_stack;
4441 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4443 PL_stack_base = AvARRAY(PL_curstack);
4444 PL_stack_sp = PL_stack_base;
4445 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4447 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4450 PL_tmps_max = REASONABLE(128);
4452 Newx(PL_markstack,REASONABLE(32),I32);
4453 PL_markstack_ptr = PL_markstack;
4454 PL_markstack_max = PL_markstack + REASONABLE(32);
4458 Newx(PL_scopestack,REASONABLE(32),I32);
4459 PL_scopestack_ix = 0;
4460 PL_scopestack_max = REASONABLE(32);
4462 Newx(PL_savestack,REASONABLE(128),ANY);
4463 PL_savestack_ix = 0;
4464 PL_savestack_max = REASONABLE(128);
4473 while (PL_curstackinfo->si_next)
4474 PL_curstackinfo = PL_curstackinfo->si_next;
4475 while (PL_curstackinfo) {
4476 PERL_SI *p = PL_curstackinfo->si_prev;
4477 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4478 Safefree(PL_curstackinfo->si_cxstack);
4479 Safefree(PL_curstackinfo);
4480 PL_curstackinfo = p;
4482 Safefree(PL_tmps_stack);
4483 Safefree(PL_markstack);
4484 Safefree(PL_scopestack);
4485 Safefree(PL_savestack);
4490 S_init_predump_symbols(pTHX)
4496 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4497 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4498 GvMULTI_on(PL_stdingv);
4499 io = GvIOp(PL_stdingv);
4500 IoTYPE(io) = IoTYPE_RDONLY;
4501 IoIFP(io) = PerlIO_stdin();
4502 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4504 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4506 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4509 IoTYPE(io) = IoTYPE_WRONLY;
4510 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4512 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4514 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4516 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4517 GvMULTI_on(PL_stderrgv);
4518 io = GvIOp(PL_stderrgv);
4519 IoTYPE(io) = IoTYPE_WRONLY;
4520 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4521 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4523 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4525 PL_statname = newSV(0); /* last filename we did stat on */
4527 Safefree(PL_osname);
4528 PL_osname = savepv(OSNAME);
4532 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4535 argc--,argv++; /* skip name of script */
4536 if (PL_doswitches) {
4537 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4541 if (argv[0][1] == '-' && !argv[0][2]) {
4545 if ((s = strchr(argv[0], '='))) {
4546 const char *const start_name = argv[0] + 1;
4547 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4548 TRUE, SVt_PV)), s + 1);
4551 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4554 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4555 GvMULTI_on(PL_argvgv);
4556 (void)gv_AVadd(PL_argvgv);
4557 av_clear(GvAVn(PL_argvgv));
4558 for (; argc > 0; argc--,argv++) {
4559 SV * const sv = newSVpv(argv[0],0);
4560 av_push(GvAVn(PL_argvgv),sv);
4561 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4562 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4565 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4566 (void)sv_utf8_decode(sv);
4572 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4577 PL_toptarget = newSV_type(SVt_PVFM);
4578 sv_setpvn(PL_toptarget, "", 0);
4579 PL_bodytarget = newSV_type(SVt_PVFM);
4580 sv_setpvn(PL_bodytarget, "", 0);
4581 PL_formtarget = PL_bodytarget;
4585 init_argv_symbols(argc,argv);
4587 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4588 #ifdef MACOS_TRADITIONAL
4589 /* $0 is not majick on a Mac */
4590 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4592 sv_setpv(GvSV(tmpgv),PL_origfilename);
4593 magicname("0", "0", 1);
4596 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4598 bool env_is_not_environ;
4599 GvMULTI_on(PL_envgv);
4600 hv = GvHVn(PL_envgv);
4601 hv_magic(hv, NULL, PERL_MAGIC_env);
4603 #ifdef USE_ENVIRON_ARRAY
4604 /* Note that if the supplied env parameter is actually a copy
4605 of the global environ then it may now point to free'd memory
4606 if the environment has been modified since. To avoid this
4607 problem we treat env==NULL as meaning 'use the default'
4611 env_is_not_environ = env != environ;
4612 if (env_is_not_environ
4613 # ifdef USE_ITHREADS
4614 && PL_curinterp == aTHX
4623 for (; *env; env++) {
4624 if (!(s = strchr(*env,'=')) || s == *env)
4626 #if defined(MSDOS) && !defined(DJGPP)
4631 sv = newSVpv(s+1, 0);
4632 (void)hv_store(hv, *env, s - *env, sv, 0);
4633 if (env_is_not_environ)
4637 #endif /* USE_ENVIRON_ARRAY */
4638 #endif /* !PERL_MICRO */
4641 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4642 SvREADONLY_off(GvSV(tmpgv));
4643 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4644 SvREADONLY_on(GvSV(tmpgv));
4646 #ifdef THREADS_HAVE_PIDS
4647 PL_ppid = (IV)getppid();
4650 /* touch @F array to prevent spurious warnings 20020415 MJD */
4652 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4657 S_init_perllib(pTHX)
4663 s = PerlEnv_getenv("PERL5LIB");
4665 * It isn't possible to delete an environment variable with
4666 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4667 * case we treat PERL5LIB as undefined if it has a zero-length value.
4669 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4670 if (s && *s != '\0')
4674 incpush(s, TRUE, TRUE, TRUE, FALSE);
4676 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4678 /* Treat PERL5?LIB as a possible search list logical name -- the
4679 * "natural" VMS idiom for a Unix path string. We allow each
4680 * element to be a set of |-separated directories for compatibility.
4684 if (my_trnlnm("PERL5LIB",buf,0))
4685 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4687 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4691 /* Use the ~-expanded versions of APPLLIB (undocumented),
4692 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4695 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4699 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4701 #ifdef MACOS_TRADITIONAL
4704 SV * privdir = newSV(0);
4705 char * macperl = PerlEnv_getenv("MACPERL");
4710 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4711 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4712 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4713 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4714 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4715 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4717 SvREFCNT_dec(privdir);
4720 incpush(":", FALSE, FALSE, TRUE, FALSE);
4723 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4726 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4728 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4732 /* sitearch is always relative to sitelib on Windows for
4733 * DLL-based path intuition to work correctly */
4734 # if !defined(WIN32)
4735 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4741 /* this picks up sitearch as well */
4742 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4744 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4748 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4749 /* Search for version-specific dirs below here */
4750 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4753 #ifdef PERL_VENDORARCH_EXP
4754 /* vendorarch is always relative to vendorlib on Windows for
4755 * DLL-based path intuition to work correctly */
4756 # if !defined(WIN32)
4757 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4761 #ifdef PERL_VENDORLIB_EXP
4763 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4765 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4769 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4770 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4773 #ifdef PERL_OTHERLIBDIRS
4774 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4778 incpush(".", FALSE, FALSE, TRUE, FALSE);
4779 #endif /* MACOS_TRADITIONAL */
4782 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4783 # define PERLLIB_SEP ';'
4786 # define PERLLIB_SEP '|'
4788 # if defined(MACOS_TRADITIONAL)
4789 # define PERLLIB_SEP ','
4791 # define PERLLIB_SEP ':'
4795 #ifndef PERLLIB_MANGLE
4796 # define PERLLIB_MANGLE(s,n) (s)
4799 /* Push a directory onto @INC if it exists.
4800 Generate a new SV if we do this, to save needing to copy the SV we push
4803 S_incpush_if_exists(pTHX_ SV *dir)
4807 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4808 S_ISDIR(tmpstatbuf.st_mode)) {
4809 av_push(GvAVn(PL_incgv), dir);
4816 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4821 const char *p = dir;
4826 if (addsubdirs || addoldvers) {
4830 /* Break at all separators */
4832 SV *libdir = newSV(0);
4835 /* skip any consecutive separators */
4837 while ( *p == PERLLIB_SEP ) {
4838 /* Uncomment the next line for PATH semantics */
4839 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4844 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4845 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4850 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4851 p = NULL; /* break out */
4853 #ifdef MACOS_TRADITIONAL
4854 if (!strchr(SvPVX(libdir), ':')) {
4857 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4859 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4860 sv_catpvs(libdir, ":");
4863 /* Do the if() outside the #ifdef to avoid warnings about an unused
4866 #ifdef PERL_RELOCATABLE_INC
4868 * Relocatable include entries are marked with a leading .../
4871 * 0: Remove that leading ".../"
4872 * 1: Remove trailing executable name (anything after the last '/')
4873 * from the perl path to give a perl prefix
4875 * While the @INC element starts "../" and the prefix ends with a real
4876 * directory (ie not . or ..) chop that real directory off the prefix
4877 * and the leading "../" from the @INC element. ie a logical "../"
4879 * Finally concatenate the prefix and the remainder of the @INC element
4880 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4881 * generates /usr/local/lib/perl5
4883 const char *libpath = SvPVX(libdir);
4884 STRLEN libpath_len = SvCUR(libdir);
4885 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4887 SV * const caret_X = get_sv("\030", 0);
4888 /* Going to use the SV just as a scratch buffer holding a C
4894 /* $^X is *the* source of taint if tainting is on, hence
4895 SvPOK() won't be true. */
4897 assert(SvPOKp(caret_X));
4898 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4899 /* Firstly take off the leading .../
4900 If all else fail we'll do the paths relative to the current
4902 sv_chop(libdir, libpath + 4);
4903 /* Don't use SvPV as we're intentionally bypassing taining,
4904 mortal copies that the mg_get of tainting creates, and
4905 corruption that seems to come via the save stack.
4906 I guess that the save stack isn't correctly set up yet. */
4907 libpath = SvPVX(libdir);
4908 libpath_len = SvCUR(libdir);
4910 /* This would work more efficiently with memrchr, but as it's
4911 only a GNU extension we'd need to probe for it and
4912 implement our own. Not hard, but maybe not worth it? */
4914 prefix = SvPVX(prefix_sv);
4915 lastslash = strrchr(prefix, '/');
4917 /* First time in with the *lastslash = '\0' we just wipe off
4918 the trailing /perl from (say) /usr/foo/bin/perl
4922 while ((*lastslash = '\0'), /* Do that, come what may. */
4923 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4924 && (lastslash = strrchr(prefix, '/')))) {
4925 if (lastslash[1] == '\0'
4926 || (lastslash[1] == '.'
4927 && (lastslash[2] == '/' /* ends "/." */
4928 || (lastslash[2] == '/'
4929 && lastslash[3] == '/' /* or "/.." */
4931 /* Prefix ends "/" or "/." or "/..", any of which
4932 are fishy, so don't do any more logical cleanup.
4936 /* Remove leading "../" from path */
4939 /* Next iteration round the loop removes the last
4940 directory name from prefix by writing a '\0' in
4941 the while clause. */
4943 /* prefix has been terminated with a '\0' to the correct
4944 length. libpath points somewhere into the libdir SV.
4945 We need to join the 2 with '/' and drop the result into
4947 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4948 SvREFCNT_dec(libdir);
4949 /* And this is the new libdir. */
4952 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4953 /* Need to taint reloccated paths if running set ID */
4954 SvTAINTED_on(libdir);
4957 SvREFCNT_dec(prefix_sv);
4962 * BEFORE pushing libdir onto @INC we may first push version- and
4963 * archname-specific sub-directories.
4965 if (addsubdirs || addoldvers) {
4966 #ifdef PERL_INC_VERSION_LIST
4967 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4968 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4969 const char * const *incver;
4975 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4977 while (unix[len-1] == '/') len--; /* Cosmetic */
4978 sv_usepvn(libdir,unix,len);
4981 PerlIO_printf(Perl_error_log,
4982 "Failed to unixify @INC element \"%s\"\n",
4986 #ifdef MACOS_TRADITIONAL
4987 #define PERL_AV_SUFFIX_FMT ""
4988 #define PERL_ARCH_FMT "%s:"
4989 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4991 #define PERL_AV_SUFFIX_FMT "/"
4992 #define PERL_ARCH_FMT "/%s"
4993 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4995 /* .../version/archname if -d .../version/archname */
4996 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4998 (int)PERL_REVISION, (int)PERL_VERSION,
4999 (int)PERL_SUBVERSION, ARCHNAME);
5000 subdir = S_incpush_if_exists(aTHX_ subdir);
5002 /* .../version if -d .../version */
5003 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5005 (int)PERL_REVISION, (int)PERL_VERSION,
5006 (int)PERL_SUBVERSION);
5007 subdir = S_incpush_if_exists(aTHX_ subdir);
5009 /* .../archname if -d .../archname */
5010 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5011 SVfARG(libdir), ARCHNAME);
5012 subdir = S_incpush_if_exists(aTHX_ subdir);
5016 #ifdef PERL_INC_VERSION_LIST
5018 for (incver = incverlist; *incver; incver++) {
5019 /* .../xxx if -d .../xxx */
5020 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5021 SVfARG(libdir), *incver);
5022 subdir = S_incpush_if_exists(aTHX_ subdir);
5028 /* finally push this lib directory on the end of @INC */
5029 av_push(GvAVn(PL_incgv), libdir);
5032 assert (SvREFCNT(subdir) == 1);
5033 SvREFCNT_dec(subdir);
5039 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5043 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5049 while (av_len(paramList) >= 0) {
5050 cv = (CV*)av_shift(paramList);
5052 if (paramList == PL_beginav) {
5053 /* save PL_beginav for compiler */
5054 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5056 else if (paramList == PL_checkav) {
5057 /* save PL_checkav for compiler */
5058 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5060 else if (paramList == PL_unitcheckav) {
5061 /* save PL_unitcheckav for compiler */
5062 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5073 PL_madskills |= 16384;
5078 PL_madskills &= ~16384;
5081 (void)SvPV_const(atsv, len);
5083 PL_curcop = &PL_compiling;
5084 CopLINE_set(PL_curcop, oldline);
5085 if (paramList == PL_beginav)
5086 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5088 Perl_sv_catpvf(aTHX_ atsv,
5089 "%s failed--call queue aborted",
5090 paramList == PL_checkav ? "CHECK"
5091 : paramList == PL_initav ? "INIT"
5092 : paramList == PL_unitcheckav ? "UNITCHECK"
5094 while (PL_scopestack_ix > oldscope)
5097 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5104 /* my_exit() was called */
5105 while (PL_scopestack_ix > oldscope)
5108 PL_curstash = PL_defstash;
5109 PL_curcop = &PL_compiling;
5110 CopLINE_set(PL_curcop, oldline);
5112 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5113 if (paramList == PL_beginav)
5114 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5116 Perl_croak(aTHX_ "%s failed--call queue aborted",
5117 paramList == PL_checkav ? "CHECK"
5118 : paramList == PL_initav ? "INIT"
5119 : paramList == PL_unitcheckav ? "UNITCHECK"
5126 PL_curcop = &PL_compiling;
5127 CopLINE_set(PL_curcop, oldline);
5130 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5139 Perl_my_exit(pTHX_ U32 status)
5142 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5143 (void*)thr, (unsigned long) status));
5152 STATUS_EXIT_SET(status);
5159 Perl_my_failure_exit(pTHX)
5163 /* We have been called to fall on our sword. The desired exit code
5164 * should be already set in STATUS_UNIX, but could be shifted over
5165 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5168 * If an error code has not been set, then force the issue.
5170 if (MY_POSIX_EXIT) {
5172 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5173 * the exit code when there isn't an error.
5176 if (STATUS_UNIX == 0)
5177 STATUS_UNIX_EXIT_SET(255);
5179 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5181 /* The exit code could have been set by $? or vmsish which
5182 * means that it may not be fatal. So convert
5183 * success/warning codes to fatal.
5185 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5186 STATUS_UNIX_EXIT_SET(255);
5190 /* Traditionally Perl on VMS always expects a Fatal Error. */
5191 if (vaxc$errno & 1) {
5193 /* So force success status to failure */
5194 if (STATUS_NATIVE & 1)
5199 STATUS_UNIX = EINTR; /* In case something cares */
5204 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5206 /* Encode the severity code */
5207 severity = STATUS_NATIVE & STS$M_SEVERITY;
5208 STATUS_UNIX = (severity ? severity : 1) << 8;
5210 /* Perl expects this to be a fatal error */
5211 if (severity != STS$K_SEVERE)
5220 STATUS_UNIX_SET(errno);
5222 exitstatus = STATUS_UNIX >> 8;
5223 if (exitstatus & 255)
5224 STATUS_UNIX_SET(exitstatus);
5226 STATUS_UNIX_SET(255);
5233 S_my_exit_jump(pTHX)
5238 SvREFCNT_dec(PL_e_script);
5242 POPSTACK_TO(PL_mainstack);
5250 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5253 const char * const p = SvPVX_const(PL_e_script);
5254 const char *nl = strchr(p, '\n');
5256 PERL_UNUSED_ARG(idx);
5257 PERL_UNUSED_ARG(maxlen);
5259 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5261 filter_del(read_e_script);
5264 sv_catpvn(buf_sv, p, nl-p);
5265 sv_chop(PL_e_script, nl);
5271 * c-indentation-style: bsd
5273 * indent-tabs-mode: t
5276 * ex: set ts=8 sts=4 sw=4 noet: