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 /* Init the real globals (and main thread)? */
263 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
265 PL_linestr = newSV(79);
266 sv_upgrade(PL_linestr,SVt_PVIV);
268 if (!SvREADONLY(&PL_sv_undef)) {
269 /* set read-only and try to insure than we wont see REFCNT==0
272 SvREADONLY_on(&PL_sv_undef);
273 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
275 sv_setpv(&PL_sv_no,PL_No);
276 /* value lookup in void context - happens to have the side effect
277 of caching the numeric forms. */
280 SvREADONLY_on(&PL_sv_no);
281 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
283 sv_setpv(&PL_sv_yes,PL_Yes);
286 SvREADONLY_on(&PL_sv_yes);
287 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
289 SvREADONLY_on(&PL_sv_placeholder);
290 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
293 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
294 #ifdef PERL_USES_PL_PIDSTATUS
295 PL_pidstatus = newHV();
299 PL_rs = newSVpvs("\n");
304 PL_lex_state = LEX_NOTPARSING;
310 SET_NUMERIC_STANDARD();
312 #if defined(LOCAL_PATCH_COUNT)
313 PL_localpatches = local_patches; /* For possible -v */
316 #ifdef HAVE_INTERP_INTERN
320 PerlIO_init(aTHX); /* Hook to IO system */
322 PL_fdpid = newAV(); /* for remembering popen pids by fd */
323 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
324 PL_errors = newSVpvs("");
325 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
326 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
327 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
329 /* First entry is an array of empty elements */
330 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
331 PL_regex_pad = AvARRAY(PL_regex_padav);
333 #ifdef USE_REENTRANT_API
334 Perl_reentrant_init(aTHX);
337 /* Note that strtab is a rather special HV. Assumptions are made
338 about not iterating on it, and not adding tie magic to it.
339 It is properly deallocated in perl_destruct() */
342 HvSHAREKEYS_off(PL_strtab); /* mandatory */
343 hv_ksplit(PL_strtab, 512);
345 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
346 _dyld_lookup_and_bind
347 ("__environ", (unsigned long *) &environ_pointer, NULL);
351 # ifdef USE_ENVIRON_ARRAY
352 PL_origenviron = environ;
356 /* Use sysconf(_SC_CLK_TCK) if available, if not
357 * available or if the sysconf() fails, use the HZ.
358 * BeOS has those, but returns the wrong value.
359 * The HZ if not originally defined has been by now
360 * been defined as CLK_TCK, if available. */
361 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
362 PL_clocktick = sysconf(_SC_CLK_TCK);
363 if (PL_clocktick <= 0)
367 PL_stashcache = newHV();
369 PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION,
370 (int)PERL_VERSION, (int)PERL_SUBVERSION);
373 if (!PL_mmap_page_size) {
374 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
376 SETERRNO(0, SS_NORMAL);
378 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
380 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
382 if ((long) PL_mmap_page_size < 0) {
384 SV * const error = ERRSV;
385 SvUPGRADE(error, SVt_PV);
386 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
389 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
393 # ifdef HAS_GETPAGESIZE
394 PL_mmap_page_size = getpagesize();
396 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
397 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
401 if (PL_mmap_page_size <= 0)
402 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
403 (IV) PL_mmap_page_size);
405 #endif /* HAS_MMAP */
407 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
408 PL_timesbase.tms_utime = 0;
409 PL_timesbase.tms_stime = 0;
410 PL_timesbase.tms_cutime = 0;
411 PL_timesbase.tms_cstime = 0;
422 =for apidoc nothreadhook
424 Stub that provides thread hook for perl_destruct when there are
431 Perl_nothreadhook(pTHX)
437 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
439 Perl_dump_sv_child(pTHX_ SV *sv)
442 const int sock = PL_dumper_fd;
443 const int debug_fd = PerlIO_fileno(Perl_debug_log);
444 union control_un control;
447 struct cmsghdr *cmptr;
449 unsigned char buffer[256];
451 if(sock == -1 || debug_fd == -1)
454 PerlIO_flush(Perl_debug_log);
456 /* All these shenanigans are to pass a file descriptor over to our child for
457 it to dump out to. We can't let it hold open the file descriptor when it
458 forks, as the file descriptor it will dump to can turn out to be one end
459 of pipe that some other process will wait on for EOF. (So as it would
460 be open, the wait would be forever.) */
462 msg.msg_control = control.control;
463 msg.msg_controllen = sizeof(control.control);
464 /* We're a connected socket so we don't need a destination */
470 cmptr = CMSG_FIRSTHDR(&msg);
471 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
472 cmptr->cmsg_level = SOL_SOCKET;
473 cmptr->cmsg_type = SCM_RIGHTS;
474 *((int *)CMSG_DATA(cmptr)) = 1;
476 vec[0].iov_base = (void*)&sv;
477 vec[0].iov_len = sizeof(sv);
478 got = sendmsg(sock, &msg, 0);
481 perror("Debug leaking scalars parent sendmsg failed");
484 if(got < sizeof(sv)) {
485 perror("Debug leaking scalars parent short sendmsg");
489 /* Return protocol is
491 unsigned char: length of location string (0 for empty)
492 unsigned char*: string (not terminated)
494 vec[0].iov_base = (void*)&returned_errno;
495 vec[0].iov_len = sizeof(returned_errno);
496 vec[1].iov_base = buffer;
499 got = readv(sock, vec, 2);
502 perror("Debug leaking scalars parent read failed");
503 PerlIO_flush(PerlIO_stderr());
506 if(got < sizeof(returned_errno) + 1) {
507 perror("Debug leaking scalars parent short read");
508 PerlIO_flush(PerlIO_stderr());
513 got = read(sock, buffer + 1, *buffer);
515 perror("Debug leaking scalars parent read 2 failed");
516 PerlIO_flush(PerlIO_stderr());
521 perror("Debug leaking scalars parent short read 2");
522 PerlIO_flush(PerlIO_stderr());
527 if (returned_errno || *buffer) {
528 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
529 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
530 returned_errno, strerror(returned_errno));
536 =for apidoc perl_destruct
538 Shuts down a Perl interpreter. See L<perlembed>.
547 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
549 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
553 PERL_UNUSED_ARG(my_perl);
555 /* wait for all pseudo-forked children to finish */
556 PERL_WAIT_FOR_CHILDREN;
558 destruct_level = PL_perl_destruct_level;
561 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
563 const int i = atoi(s);
564 if (destruct_level < i)
570 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
576 if (PL_endav && !PL_minus_c)
577 call_list(PL_scopestack_ix, PL_endav);
583 /* Need to flush since END blocks can produce output */
586 if (CALL_FPTR(PL_threadhook)(aTHX)) {
587 /* Threads hook has vetoed further cleanup */
588 PL_veto_cleanup = TRUE;
592 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
593 if (destruct_level != 0) {
594 /* Fork here to create a child. Our child's job is to preserve the
595 state of scalars prior to destruction, so that we can instruct it
596 to dump any scalars that we later find have leaked.
597 There's no subtlety in this code - it assumes POSIX, and it doesn't
601 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
602 perror("Debug leaking scalars socketpair failed");
608 perror("Debug leaking scalars fork failed");
612 /* We are the child */
613 const int sock = fd[1];
614 const int debug_fd = PerlIO_fileno(Perl_debug_log);
617 /* Our success message is an integer 0, and a char 0 */
618 static const char success[sizeof(int) + 1];
622 /* We need to close all other file descriptors otherwise we end up
623 with interesting hangs, where the parent closes its end of a
624 pipe, and sits waiting for (another) child to terminate. Only
625 that child never terminates, because it never gets EOF, because
626 we also have the far end of the pipe open. We even need to
627 close the debugging fd, because sometimes it happens to be one
628 end of a pipe, and a process is waiting on the other end for
629 EOF. Normally it would be closed at some point earlier in
630 destruction, but if we happen to cause the pipe to remain open,
631 EOF never occurs, and we get an infinite hang. Hence all the
632 games to pass in a file descriptor if it's actually needed. */
634 f = sysconf(_SC_OPEN_MAX);
636 where = "sysconf failed";
647 union control_un control;
650 struct cmsghdr *cmptr;
654 msg.msg_control = control.control;
655 msg.msg_controllen = sizeof(control.control);
656 /* We're a connected socket so we don't need a source */
660 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
662 vec[0].iov_base = (void*)⌖
663 vec[0].iov_len = sizeof(target);
665 got = recvmsg(sock, &msg, 0);
670 where = "recv failed";
673 if(got < sizeof(target)) {
674 where = "short recv";
678 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
682 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
683 where = "wrong cmsg_len";
686 if(cmptr->cmsg_level != SOL_SOCKET) {
687 where = "wrong cmsg_level";
690 if(cmptr->cmsg_type != SCM_RIGHTS) {
691 where = "wrong cmsg_type";
695 got_fd = *(int*)CMSG_DATA(cmptr);
696 /* For our last little bit of trickery, put the file descriptor
697 back into Perl_debug_log, as if we never actually closed it
699 if(got_fd != debug_fd) {
700 if (dup2(got_fd, debug_fd) == -1) {
707 PerlIO_flush(Perl_debug_log);
709 got = write(sock, &success, sizeof(success));
712 where = "write failed";
715 if(got < sizeof(success)) {
716 where = "short write";
723 int send_errno = errno;
724 unsigned char length = (unsigned char) strlen(where);
725 struct iovec failure[3] = {
726 {(void*)&send_errno, sizeof(send_errno)},
728 {(void*)where, length}
730 int got = writev(sock, failure, 3);
731 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
732 in the parent if we try to read from the socketpair after the
733 child has exited, even if there was data to read.
734 So sleep a bit to give the parent a fighting chance of
737 _exit((got == -1) ? errno : 0);
741 PL_dumper_fd = fd[0];
746 /* We must account for everything. */
748 /* Destroy the main CV and syntax tree */
749 /* Do this now, because destroying ops can cause new SVs to be generated
750 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
751 PL_curcop to point to a valid op from which the filename structure
753 PL_curcop = &PL_compiling;
755 /* ensure comppad/curpad to refer to main's pad */
756 if (CvPADLIST(PL_main_cv)) {
757 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
759 op_free(PL_main_root);
762 PL_main_start = NULL;
763 SvREFCNT_dec(PL_main_cv);
767 /* Tell PerlIO we are about to tear things apart in case
768 we have layers which are using resources that should
772 PerlIO_destruct(aTHX);
774 if (PL_sv_objcount) {
776 * Try to destruct global references. We do this first so that the
777 * destructors and destructees still exist. Some sv's might remain.
778 * Non-referenced objects are on their own.
782 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
783 PL_defoutgv = NULL; /* may have been freed */
786 /* unhook hooks which will soon be, or use, destroyed data */
787 SvREFCNT_dec(PL_warnhook);
789 SvREFCNT_dec(PL_diehook);
792 /* call exit list functions */
793 while (PL_exitlistlen-- > 0)
794 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
796 Safefree(PL_exitlist);
801 /* jettison our possibly duplicated environment */
802 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
803 * so we certainly shouldn't free it here
806 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
807 if (environ != PL_origenviron && !PL_use_safe_putenv
809 /* only main thread can free environ[0] contents */
810 && PL_curinterp == aTHX
816 for (i = 0; environ[i]; i++)
817 safesysfree(environ[i]);
819 /* Must use safesysfree() when working with environ. */
820 safesysfree(environ);
822 environ = PL_origenviron;
825 #endif /* !PERL_MICRO */
827 if (destruct_level == 0) {
829 DEBUG_P(debprofdump());
831 #if defined(PERLIO_LAYERS)
832 /* No more IO - including error messages ! */
833 PerlIO_cleanup(aTHX);
836 CopFILE_free(&PL_compiling);
837 CopSTASH_free(&PL_compiling);
839 /* The exit() function will do everything that needs doing. */
843 /* reset so print() ends up where we expect */
847 /* the syntax tree is shared between clones
848 * so op_free(PL_main_root) only ReREFCNT_dec's
849 * REGEXPs in the parent interpreter
850 * we need to manually ReREFCNT_dec for the clones
853 I32 i = AvFILLp(PL_regex_padav) + 1;
854 SV * const * const ary = AvARRAY(PL_regex_padav);
857 SV * const resv = ary[--i];
859 if (SvFLAGS(resv) & SVf_BREAK) {
860 /* this is PL_reg_curpm, already freed
861 * flag is set in regexec.c:S_regtry
863 SvFLAGS(resv) &= ~SVf_BREAK;
865 else if(SvREPADTMP(resv)) {
866 SvREPADTMP_off(resv);
868 else if(SvIOKp(resv)) {
869 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
874 SvREFCNT_dec(PL_regex_padav);
875 PL_regex_padav = NULL;
879 SvREFCNT_dec((SV*) PL_stashcache);
880 PL_stashcache = NULL;
882 /* loosen bonds of global variables */
885 (void)PerlIO_close(PL_rsfp);
889 /* Filters for program text */
890 SvREFCNT_dec(PL_rsfp_filters);
891 PL_rsfp_filters = NULL;
894 Safefree(PL_splitstr);
899 PL_preprocess = FALSE;
905 PL_doswitches = FALSE;
906 PL_dowarn = G_WARN_OFF;
907 PL_doextract = FALSE;
908 PL_sawampersand = FALSE; /* must save all match strings */
911 Safefree(PL_inplace);
913 SvREFCNT_dec(PL_patchlevel);
916 SvREFCNT_dec(PL_e_script);
922 /* magical thingies */
924 SvREFCNT_dec(PL_ofs_sv); /* $, */
927 SvREFCNT_dec(PL_ors_sv); /* $\ */
930 SvREFCNT_dec(PL_rs); /* $/ */
933 Safefree(PL_osname); /* $^O */
936 SvREFCNT_dec(PL_statname);
940 /* defgv, aka *_ should be taken care of elsewhere */
942 /* clean up after study() */
943 SvREFCNT_dec(PL_lastscream);
944 PL_lastscream = NULL;
945 Safefree(PL_screamfirst);
947 Safefree(PL_screamnext);
951 Safefree(PL_efloatbuf);
955 /* startup and shutdown function lists */
956 SvREFCNT_dec(PL_beginav);
957 SvREFCNT_dec(PL_beginav_save);
958 SvREFCNT_dec(PL_endav);
959 SvREFCNT_dec(PL_checkav);
960 SvREFCNT_dec(PL_checkav_save);
961 SvREFCNT_dec(PL_unitcheckav);
962 SvREFCNT_dec(PL_unitcheckav_save);
963 SvREFCNT_dec(PL_initav);
965 PL_beginav_save = NULL;
968 PL_checkav_save = NULL;
969 PL_unitcheckav = NULL;
970 PL_unitcheckav_save = NULL;
973 /* shortcuts just get cleared */
982 PL_last_in_gv = NULL;
990 PL_DBassertion = NULL;
995 SvREFCNT_dec(PL_argvout_stack);
996 PL_argvout_stack = NULL;
998 SvREFCNT_dec(PL_modglobal);
1000 SvREFCNT_dec(PL_preambleav);
1001 PL_preambleav = NULL;
1002 SvREFCNT_dec(PL_subname);
1004 SvREFCNT_dec(PL_linestr);
1006 #ifdef PERL_USES_PL_PIDSTATUS
1007 SvREFCNT_dec(PL_pidstatus);
1008 PL_pidstatus = NULL;
1010 SvREFCNT_dec(PL_toptarget);
1011 PL_toptarget = NULL;
1012 SvREFCNT_dec(PL_bodytarget);
1013 PL_bodytarget = NULL;
1014 PL_formtarget = NULL;
1016 /* free locale stuff */
1017 #ifdef USE_LOCALE_COLLATE
1018 Safefree(PL_collation_name);
1019 PL_collation_name = NULL;
1022 #ifdef USE_LOCALE_NUMERIC
1023 Safefree(PL_numeric_name);
1024 PL_numeric_name = NULL;
1025 SvREFCNT_dec(PL_numeric_radix_sv);
1026 PL_numeric_radix_sv = NULL;
1029 /* clear utf8 character classes */
1030 SvREFCNT_dec(PL_utf8_alnum);
1031 SvREFCNT_dec(PL_utf8_alnumc);
1032 SvREFCNT_dec(PL_utf8_ascii);
1033 SvREFCNT_dec(PL_utf8_alpha);
1034 SvREFCNT_dec(PL_utf8_space);
1035 SvREFCNT_dec(PL_utf8_cntrl);
1036 SvREFCNT_dec(PL_utf8_graph);
1037 SvREFCNT_dec(PL_utf8_digit);
1038 SvREFCNT_dec(PL_utf8_upper);
1039 SvREFCNT_dec(PL_utf8_lower);
1040 SvREFCNT_dec(PL_utf8_print);
1041 SvREFCNT_dec(PL_utf8_punct);
1042 SvREFCNT_dec(PL_utf8_xdigit);
1043 SvREFCNT_dec(PL_utf8_mark);
1044 SvREFCNT_dec(PL_utf8_toupper);
1045 SvREFCNT_dec(PL_utf8_totitle);
1046 SvREFCNT_dec(PL_utf8_tolower);
1047 SvREFCNT_dec(PL_utf8_tofold);
1048 SvREFCNT_dec(PL_utf8_idstart);
1049 SvREFCNT_dec(PL_utf8_idcont);
1050 PL_utf8_alnum = NULL;
1051 PL_utf8_alnumc = NULL;
1052 PL_utf8_ascii = NULL;
1053 PL_utf8_alpha = NULL;
1054 PL_utf8_space = NULL;
1055 PL_utf8_cntrl = NULL;
1056 PL_utf8_graph = NULL;
1057 PL_utf8_digit = NULL;
1058 PL_utf8_upper = NULL;
1059 PL_utf8_lower = NULL;
1060 PL_utf8_print = NULL;
1061 PL_utf8_punct = NULL;
1062 PL_utf8_xdigit = NULL;
1063 PL_utf8_mark = NULL;
1064 PL_utf8_toupper = NULL;
1065 PL_utf8_totitle = NULL;
1066 PL_utf8_tolower = NULL;
1067 PL_utf8_tofold = NULL;
1068 PL_utf8_idstart = NULL;
1069 PL_utf8_idcont = NULL;
1071 if (!specialWARN(PL_compiling.cop_warnings))
1072 PerlMemShared_free(PL_compiling.cop_warnings);
1073 PL_compiling.cop_warnings = NULL;
1074 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1075 PL_compiling.cop_hints_hash = NULL;
1076 CopFILE_free(&PL_compiling);
1077 CopSTASH_free(&PL_compiling);
1079 /* Prepare to destruct main symbol table. */
1084 SvREFCNT_dec(PL_curstname);
1085 PL_curstname = NULL;
1087 /* clear queued errors */
1088 SvREFCNT_dec(PL_errors);
1092 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1093 if (PL_scopestack_ix != 0)
1094 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1095 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1096 (long)PL_scopestack_ix);
1097 if (PL_savestack_ix != 0)
1098 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1099 "Unbalanced saves: %ld more saves than restores\n",
1100 (long)PL_savestack_ix);
1101 if (PL_tmps_floor != -1)
1102 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1103 (long)PL_tmps_floor + 1);
1104 if (cxstack_ix != -1)
1105 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1106 (long)cxstack_ix + 1);
1109 /* Now absolutely destruct everything, somehow or other, loops or no. */
1110 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1111 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1113 /* the 2 is for PL_fdpid and PL_strtab */
1114 while (PL_sv_count > 2 && sv_clean_all())
1117 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1118 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1119 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1120 SvFLAGS(PL_strtab) |= SVt_PVHV;
1122 AvREAL_off(PL_fdpid); /* no surviving entries */
1123 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1126 #ifdef HAVE_INTERP_INTERN
1130 /* Destruct the global string table. */
1132 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1133 * so that sv_free() won't fail on them.
1134 * Now that the global string table is using a single hunk of memory
1135 * for both HE and HEK, we either need to explicitly unshare it the
1136 * correct way, or actually free things here.
1139 const I32 max = HvMAX(PL_strtab);
1140 HE * const * const array = HvARRAY(PL_strtab);
1141 HE *hent = array[0];
1144 if (hent && ckWARN_d(WARN_INTERNAL)) {
1145 HE * const next = HeNEXT(hent);
1146 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1147 "Unbalanced string table refcount: (%ld) for \"%s\"",
1148 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1155 hent = array[riter];
1160 HvARRAY(PL_strtab) = 0;
1161 HvTOTALKEYS(PL_strtab) = 0;
1162 HvFILL(PL_strtab) = 0;
1164 SvREFCNT_dec(PL_strtab);
1167 /* free the pointer tables used for cloning */
1168 ptr_table_free(PL_ptr_table);
1169 PL_ptr_table = (PTR_TBL_t*)NULL;
1172 /* free special SVs */
1174 SvREFCNT(&PL_sv_yes) = 0;
1175 sv_clear(&PL_sv_yes);
1176 SvANY(&PL_sv_yes) = NULL;
1177 SvFLAGS(&PL_sv_yes) = 0;
1179 SvREFCNT(&PL_sv_no) = 0;
1180 sv_clear(&PL_sv_no);
1181 SvANY(&PL_sv_no) = NULL;
1182 SvFLAGS(&PL_sv_no) = 0;
1186 for (i=0; i<=2; i++) {
1187 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1188 sv_clear(PERL_DEBUG_PAD(i));
1189 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1190 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1194 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1195 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1197 #ifdef DEBUG_LEAKING_SCALARS
1198 if (PL_sv_count != 0) {
1203 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1204 svend = &sva[SvREFCNT(sva)];
1205 for (sv = sva + 1; sv < svend; ++sv) {
1206 if (SvTYPE(sv) != SVTYPEMASK) {
1207 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1209 " refcnt=%"UVuf pTHX__FORMAT "\n"
1210 "\tallocated at %s:%d %s %s%s\n",
1211 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1212 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1214 sv->sv_debug_inpad ? "for" : "by",
1215 sv->sv_debug_optype ?
1216 PL_op_name[sv->sv_debug_optype]: "(none)",
1217 sv->sv_debug_cloned ? " (cloned)" : ""
1219 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1220 Perl_dump_sv_child(aTHX_ sv);
1226 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1230 /* Wait for up to 4 seconds for child to terminate.
1231 This seems to be the least effort way of timing out on reaping
1233 struct timeval waitfor = {4, 0};
1234 int sock = PL_dumper_fd;
1238 FD_SET(sock, &rset);
1239 select(sock + 1, &rset, NULL, NULL, &waitfor);
1240 waitpid(child, &status, WNOHANG);
1248 #if defined(PERLIO_LAYERS)
1249 /* No more IO - including error messages ! */
1250 PerlIO_cleanup(aTHX);
1253 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1254 as currently layers use it rather than NULL as a marker
1255 for no arg - and will try and SvREFCNT_dec it.
1257 SvREFCNT(&PL_sv_undef) = 0;
1258 SvREADONLY_off(&PL_sv_undef);
1260 Safefree(PL_origfilename);
1261 PL_origfilename = NULL;
1262 Safefree(PL_reg_start_tmp);
1263 PL_reg_start_tmp = (char**)NULL;
1264 PL_reg_start_tmpl = 0;
1265 Safefree(PL_reg_curpm);
1266 Safefree(PL_reg_poscache);
1267 free_tied_hv_pool();
1268 Safefree(PL_op_mask);
1269 Safefree(PL_psig_ptr);
1270 PL_psig_ptr = (SV**)NULL;
1271 Safefree(PL_psig_name);
1272 PL_psig_name = (SV**)NULL;
1273 Safefree(PL_bitcount);
1275 Safefree(PL_psig_pend);
1276 PL_psig_pend = (int*)NULL;
1279 PL_tainting = FALSE;
1280 PL_taint_warn = FALSE;
1281 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1284 DEBUG_P(debprofdump());
1286 #ifdef USE_REENTRANT_API
1287 Perl_reentrant_free(aTHX);
1292 while (PL_regmatch_slab) {
1293 regmatch_slab *s = PL_regmatch_slab;
1294 PL_regmatch_slab = PL_regmatch_slab->next;
1298 /* As the absolutely last thing, free the non-arena SV for mess() */
1301 /* we know that type == SVt_PVMG */
1303 /* it could have accumulated taint magic */
1306 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1307 moremagic = mg->mg_moremagic;
1308 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1310 Safefree(mg->mg_ptr);
1314 /* we know that type >= SVt_PV */
1315 SvPV_free(PL_mess_sv);
1316 Safefree(SvANY(PL_mess_sv));
1317 Safefree(PL_mess_sv);
1324 =for apidoc perl_free
1326 Releases a Perl interpreter. See L<perlembed>.
1336 if (PL_veto_cleanup)
1339 #ifdef PERL_TRACK_MEMPOOL
1342 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1343 * value as we're probably hunting memory leaks then
1345 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1346 if (!s || atoi(s) == 0) {
1347 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1348 thread at thread exit. */
1349 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1350 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1355 #if defined(WIN32) || defined(NETWARE)
1356 # if defined(PERL_IMPLICIT_SYS)
1359 void *host = nw_internal_host;
1361 void *host = w32_internal_host;
1363 PerlMem_free(aTHXx);
1365 nw_delete_internal_host(host);
1367 win32_delete_internal_host(host);
1371 PerlMem_free(aTHXx);
1374 PerlMem_free(aTHXx);
1378 #if defined(USE_ITHREADS)
1379 /* provide destructors to clean up the thread key when libperl is unloaded */
1380 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1382 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1383 #pragma fini "perl_fini"
1384 #elif defined(__sun) && !defined(__GNUC__)
1385 #pragma fini (perl_fini)
1389 #if defined(__GNUC__)
1390 __attribute__((destructor))
1395 if (PL_curinterp && !PL_veto_cleanup)
1400 #endif /* THREADS */
1403 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1406 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1407 PL_exitlist[PL_exitlistlen].fn = fn;
1408 PL_exitlist[PL_exitlistlen].ptr = ptr;
1412 #ifdef HAS_PROCSELFEXE
1413 /* This is a function so that we don't hold on to MAXPATHLEN
1414 bytes of stack longer than necessary
1417 S_procself_val(pTHX_ SV *sv, const char *arg0)
1419 char buf[MAXPATHLEN];
1420 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1422 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1423 includes a spurious NUL which will cause $^X to fail in system
1424 or backticks (this will prevent extensions from being built and
1425 many tests from working). readlink is not meant to add a NUL.
1426 Normal readlink works fine.
1428 if (len > 0 && buf[len-1] == '\0') {
1432 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1433 returning the text "unknown" from the readlink rather than the path
1434 to the executable (or returning an error from the readlink). Any valid
1435 path has a '/' in it somewhere, so use that to validate the result.
1436 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1438 if (len > 0 && memchr(buf, '/', len)) {
1439 sv_setpvn(sv,buf,len);
1445 #endif /* HAS_PROCSELFEXE */
1448 S_set_caret_X(pTHX) {
1450 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1452 #ifdef HAS_PROCSELFEXE
1453 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1456 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1458 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1465 =for apidoc perl_parse
1467 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1473 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1480 PERL_UNUSED_ARG(my_perl);
1482 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1485 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1486 setuid perl scripts securely.\n");
1487 #endif /* IAMSUID */
1490 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1491 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1492 * This MUST be done before any hash stores or fetches take place.
1493 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1494 * yourself, it is your responsibility to provide a good random seed!
1495 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1496 if (!PL_rehash_seed_set)
1497 PL_rehash_seed = get_hash_seed();
1499 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1501 if (s && (atoi(s) == 1))
1502 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1504 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1509 if (PL_origalen != 0) {
1510 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1513 /* Set PL_origalen be the sum of the contiguous argv[]
1514 * elements plus the size of the env in case that it is
1515 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1516 * as the maximum modifiable length of $0. In the worst case
1517 * the area we are able to modify is limited to the size of
1518 * the original argv[0]. (See below for 'contiguous', though.)
1520 const char *s = NULL;
1523 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1524 /* Do the mask check only if the args seem like aligned. */
1526 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1528 /* See if all the arguments are contiguous in memory. Note
1529 * that 'contiguous' is a loose term because some platforms
1530 * align the argv[] and the envp[]. If the arguments look
1531 * like non-aligned, assume that they are 'strictly' or
1532 * 'traditionally' contiguous. If the arguments look like
1533 * aligned, we just check that they are within aligned
1534 * PTRSIZE bytes. As long as no system has something bizarre
1535 * like the argv[] interleaved with some other data, we are
1536 * fine. (Did I just evoke Murphy's Law?) --jhi */
1537 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1539 for (i = 1; i < PL_origargc; i++) {
1540 if ((PL_origargv[i] == s + 1
1542 || PL_origargv[i] == s + 2
1547 (PL_origargv[i] > s &&
1549 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1559 /* Can we grab env area too to be used as the area for $0? */
1560 if (s && PL_origenviron) {
1561 if ((PL_origenviron[0] == s + 1)
1564 (PL_origenviron[0] > s &&
1565 PL_origenviron[0] <=
1566 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1569 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1570 s = PL_origenviron[0];
1573 my_setenv("NoNe SuCh", NULL);
1574 /* Force copy of environment. */
1575 for (i = 1; PL_origenviron[i]; i++) {
1576 if (PL_origenviron[i] == s + 1
1579 (PL_origenviron[i] > s &&
1580 PL_origenviron[i] <=
1581 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1584 s = PL_origenviron[i];
1592 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1597 /* Come here if running an undumped a.out. */
1599 PL_origfilename = savepv(argv[0]);
1600 PL_do_undump = FALSE;
1601 cxstack_ix = -1; /* start label stack again */
1603 assert (!PL_tainted);
1605 S_set_caret_X(aTHX);
1607 init_postdump_symbols(argc,argv,env);
1612 op_free(PL_main_root);
1613 PL_main_root = NULL;
1615 PL_main_start = NULL;
1616 SvREFCNT_dec(PL_main_cv);
1620 oldscope = PL_scopestack_ix;
1621 PL_dowarn = G_WARN_OFF;
1626 parse_body(env,xsinit);
1628 call_list(oldscope, PL_unitcheckav);
1630 call_list(oldscope, PL_checkav);
1637 /* my_exit() was called */
1638 while (PL_scopestack_ix > oldscope)
1641 PL_curstash = PL_defstash;
1643 call_list(oldscope, PL_unitcheckav);
1645 call_list(oldscope, PL_checkav);
1649 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1658 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1661 int argc = PL_origargc;
1662 char **argv = PL_origargv;
1663 const char *scriptname = NULL;
1664 VOL bool dosearch = FALSE;
1665 const char *validarg = "";
1667 register char *s, c;
1668 const char *cddir = NULL;
1669 #ifdef USE_SITECUSTOMIZE
1670 bool minus_f = FALSE;
1673 sv_setpvn(PL_linestr,"",0);
1674 sv = newSVpvs(""); /* first used for -I flags */
1678 for (argc--,argv++; argc > 0; argc--,argv++) {
1679 if (argv[0][0] != '-' || !argv[0][1])
1683 validarg = " PHOOEY ";
1687 * Can we rely on the kernel to start scripts with argv[1] set to
1688 * contain all #! line switches (the whole line)? (argv[0] is set to
1689 * the interpreter name, argv[2] to the script name; argv[3] and
1690 * above may contain other arguments.)
1697 #ifndef PERL_STRICT_CR
1722 if ((s = moreswitches(s)))
1727 CHECK_MALLOC_TOO_LATE_FOR('t');
1728 if( !PL_tainting ) {
1729 PL_taint_warn = TRUE;
1735 CHECK_MALLOC_TOO_LATE_FOR('T');
1737 PL_taint_warn = FALSE;
1745 #ifdef MACOS_TRADITIONAL
1746 /* ignore -e for Dev:Pseudo argument */
1747 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1750 forbid_setid('e', -1);
1752 PL_e_script = newSVpvs("");
1753 filter_add(read_e_script, NULL);
1756 sv_catpv(PL_e_script, s);
1758 sv_catpv(PL_e_script, argv[1]);
1762 Perl_croak(aTHX_ "No code specified for -%c", c);
1763 sv_catpvs(PL_e_script, "\n");
1767 #ifdef USE_SITECUSTOMIZE
1773 case 'I': /* -I handled both here and in moreswitches() */
1774 forbid_setid('I', -1);
1775 if (!*++s && (s=argv[1]) != NULL) {
1779 STRLEN len = strlen(s);
1780 const char * const p = savepvn(s, len);
1781 incpush(p, TRUE, TRUE, FALSE, FALSE);
1782 sv_catpvs(sv, "-I");
1783 sv_catpvn(sv, p, len);
1788 Perl_croak(aTHX_ "No directory specified for -I");
1791 forbid_setid('P', -1);
1792 PL_preprocess = TRUE;
1796 forbid_setid('S', -1);
1804 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1808 opts_prog = newSVpvs("print Config::myconfig(),");
1810 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1812 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1814 opts = SvCUR(opts_prog);
1816 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1820 # ifdef DEBUG_LEAKING_SCALARS
1821 " DEBUG_LEAKING_SCALARS"
1823 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1824 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1826 # ifdef FAKE_THREADS
1829 # ifdef MULTIPLICITY
1838 # ifdef PERL_DONT_CREATE_GVSV
1839 " PERL_DONT_CREATE_GVSV"
1841 # ifdef PERL_GLOBAL_STRUCT
1842 " PERL_GLOBAL_STRUCT"
1844 # ifdef PERL_IMPLICIT_CONTEXT
1845 " PERL_IMPLICIT_CONTEXT"
1847 # ifdef PERL_IMPLICIT_SYS
1848 " PERL_IMPLICIT_SYS"
1853 # ifdef PERL_MALLOC_WRAP
1856 # ifdef PERL_NEED_APPCTX
1859 # ifdef PERL_NEED_TIMESBASE
1860 " PERL_NEED_TIMESBASE"
1862 # ifdef PERL_OLD_COPY_ON_WRITE
1863 " PERL_OLD_COPY_ON_WRITE"
1865 # ifdef PERL_TRACK_MEMPOOL
1866 " PERL_TRACK_MEMPOOL"
1868 # ifdef PERL_USE_SAFE_PUTENV
1869 " PERL_USE_SAFE_PUTENV"
1871 #ifdef PERL_USES_PL_PIDSTATUS
1872 " PERL_USES_PL_PIDSTATUS"
1874 # ifdef PL_OP_SLAB_ALLOC
1877 # ifdef THREADS_HAVE_PIDS
1878 " THREADS_HAVE_PIDS"
1880 # ifdef USE_64_BIT_ALL
1883 # ifdef USE_64_BIT_INT
1886 # ifdef USE_ITHREADS
1889 # ifdef USE_LARGE_FILES
1892 # ifdef USE_LONG_DOUBLE
1898 # ifdef USE_REENTRANT_API
1899 " USE_REENTRANT_API"
1904 # ifdef USE_SITECUSTOMIZE
1905 " USE_SITECUSTOMIZE"
1912 while (SvCUR(opts_prog) > opts+76) {
1913 /* find last space after "options: " and before col 76
1917 char * const pv = SvPV_nolen(opts_prog);
1918 const char c = pv[opts+76];
1920 space = strrchr(pv+opts+26, ' ');
1922 if (!space) break; /* "Can't happen" */
1924 /* break the line before that space */
1927 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1928 STR_WITH_LEN("\\n "));
1931 sv_catpvs(opts_prog,"\\n\",");
1933 #if defined(LOCAL_PATCH_COUNT)
1934 if (LOCAL_PATCH_COUNT > 0) {
1936 sv_catpvs(opts_prog,
1937 "\" Locally applied patches:\\n\",");
1938 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1939 if (PL_localpatches[i])
1940 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1941 0, PL_localpatches[i], 0);
1945 Perl_sv_catpvf(aTHX_ opts_prog,
1946 "\" Built under %s\\n\"",OSNAME);
1949 Perl_sv_catpvf(aTHX_ opts_prog,
1950 ",\" Compiled at %s %s\\n\"",__DATE__,
1953 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1957 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1958 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1959 "sort grep {/^PERL/} keys %ENV; ");
1961 sv_catpvs(opts_prog,
1962 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1964 sv_catpvs(opts_prog,
1965 "print \" \\%ENV:\\n @env\\n\" if @env;"
1966 "print \" \\@INC:\\n @INC\\n\";");
1970 opts_prog = Perl_newSVpvf(aTHX_
1971 "Config::config_vars(qw%c%s%c)",
1975 av_push(PL_preambleav, opts_prog);
1976 /* don't look for script or read stdin */
1977 scriptname = BIT_BUCKET;
1981 PL_doextract = TRUE;
1989 if (!*++s || isSPACE(*s)) {
1993 /* catch use of gnu style long options */
1994 if (strEQ(s, "version")) {
1998 if (strEQ(s, "help")) {
2005 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2011 #ifndef SECURE_INTERNAL_GETENV
2014 (s = PerlEnv_getenv("PERL5OPT")))
2016 const char *popt = s;
2019 if (*s == '-' && *(s+1) == 'T') {
2020 CHECK_MALLOC_TOO_LATE_FOR('T');
2022 PL_taint_warn = FALSE;
2025 char *popt_copy = NULL;
2038 if (!strchr("CDIMUdmtwA", *s))
2039 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2043 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2044 s = popt_copy + (s - popt);
2045 d = popt_copy + (d - popt);
2052 if( !PL_tainting ) {
2053 PL_taint_warn = TRUE;
2063 #ifdef USE_SITECUSTOMIZE
2065 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2066 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2071 scriptname = argv[0];
2074 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2076 else if (scriptname == NULL) {
2078 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2084 /* Set $^X early so that it can be used for relocatable paths in @INC */
2085 assert (!PL_tainted);
2087 S_set_caret_X(aTHX);
2094 = open_script(scriptname, dosearch, sv, &suidscript);
2096 validate_suid(validarg, scriptname, fdscript, suidscript);
2099 # if defined(SIGCHLD) || defined(SIGCLD)
2102 # define SIGCHLD SIGCLD
2104 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2105 if (sigstate == (Sighandler_t) SIG_IGN) {
2106 if (ckWARN(WARN_SIGNAL))
2107 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2108 "Can't ignore signal CHLD, forcing to default");
2109 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2116 #ifdef MACOS_TRADITIONAL
2117 || gMacPerl_AlwaysExtract
2121 /* This will croak if suidscript is >= 0, as -x cannot be used with
2123 forbid_setid('x', suidscript);
2124 /* Hence you can't get here if suidscript >= 0 */
2127 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2128 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2132 PL_main_cv = PL_compcv = (CV*)newSV(0);
2133 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2134 CvUNIQUE_on(PL_compcv);
2136 CvPADLIST(PL_compcv) = pad_new(0);
2139 boot_core_UNIVERSAL();
2140 boot_core_xsutils();
2143 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2145 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2151 # ifdef HAS_SOCKS5_INIT
2152 socks5_init(argv[0]);
2158 init_predump_symbols();
2159 /* init_postdump_symbols not currently designed to be called */
2160 /* more than once (ENV isn't cleared first, for example) */
2161 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2163 init_postdump_symbols(argc,argv,env);
2165 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2166 * or explicitly in some platforms.
2167 * locale.c:Perl_init_i18nl10n() if the environment
2168 * look like the user wants to use UTF-8. */
2169 #if defined(__SYMBIAN32__)
2170 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2173 /* Requires init_predump_symbols(). */
2174 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2179 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2180 * and the default open disciplines. */
2181 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2182 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2184 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2185 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2186 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2188 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2189 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2190 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2192 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2193 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2194 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2196 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2197 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2200 sv_setpvn(sv, ":utf8\0:utf8", 11);
2202 sv_setpvn(sv, ":utf8\0", 6);
2205 sv_setpvn(sv, "\0:utf8", 6);
2211 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2212 if (strEQ(s, "unsafe"))
2213 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2214 else if (strEQ(s, "safe"))
2215 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2217 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2221 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2225 PL_xmlfp = PerlIO_stdout();
2227 PL_xmlfp = PerlIO_open(s, "w");
2229 Perl_croak(aTHX_ "Can't open %s", s);
2231 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2233 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2234 PL_madskills = atoi(s);
2235 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2241 /* now parse the script */
2243 SETERRNO(0,SS_NORMAL);
2245 #ifdef MACOS_TRADITIONAL
2246 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2248 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2250 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2251 MacPerl_MPWFileName(PL_origfilename));
2255 if (yyparse() || PL_error_count) {
2257 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2259 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2264 CopLINE_set(PL_curcop, 0);
2265 PL_curstash = PL_defstash;
2266 PL_preprocess = FALSE;
2268 SvREFCNT_dec(PL_e_script);
2276 SAVECOPFILE(PL_curcop);
2277 SAVECOPLINE(PL_curcop);
2278 gv_check(PL_defstash);
2285 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2286 dump_mstats("after compilation:");
2295 =for apidoc perl_run
2297 Tells a Perl interpreter to run. See L<perlembed>.
2310 PERL_UNUSED_ARG(my_perl);
2312 oldscope = PL_scopestack_ix;
2320 cxstack_ix = -1; /* start context stack again */
2322 case 0: /* normal completion */
2326 case 2: /* my_exit() */
2327 while (PL_scopestack_ix > oldscope)
2330 PL_curstash = PL_defstash;
2331 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2332 PL_endav && !PL_minus_c)
2333 call_list(oldscope, PL_endav);
2335 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2336 dump_mstats("after execution: ");
2342 POPSTACK_TO(PL_mainstack);
2345 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2357 S_run_body(pTHX_ I32 oldscope)
2360 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2361 PL_sawampersand ? "Enabling" : "Omitting"));
2363 if (!PL_restartop) {
2367 exit(0); /* less likely to core dump than my_exit(0) */
2370 DEBUG_x(dump_all());
2373 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2375 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2379 #ifdef MACOS_TRADITIONAL
2380 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2381 (gMacPerl_ErrorFormat ? "# " : ""),
2382 MacPerl_MPWFileName(PL_origfilename));
2384 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2388 if (PERLDB_SINGLE && PL_DBsingle)
2389 sv_setiv(PL_DBsingle, 1);
2391 call_list(oldscope, PL_initav);
2397 PL_op = PL_restartop;
2401 else if (PL_main_start) {
2402 CvDEPTH(PL_main_cv) = 1;
2403 PL_op = PL_main_start;
2411 =head1 SV Manipulation Functions
2413 =for apidoc p||get_sv
2415 Returns the SV of the specified Perl scalar. If C<create> is set and the
2416 Perl variable does not exist then it will be created. If C<create> is not
2417 set and the variable does not exist then NULL is returned.
2423 Perl_get_sv(pTHX_ const char *name, I32 create)
2426 gv = gv_fetchpv(name, create, SVt_PV);
2433 =head1 Array Manipulation Functions
2435 =for apidoc p||get_av
2437 Returns the AV of the specified Perl array. If C<create> is set and the
2438 Perl variable does not exist then it will be created. If C<create> is not
2439 set and the variable does not exist then NULL is returned.
2445 Perl_get_av(pTHX_ const char *name, I32 create)
2447 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2456 =head1 Hash Manipulation Functions
2458 =for apidoc p||get_hv
2460 Returns the HV of the specified Perl hash. If C<create> is set and the
2461 Perl variable does not exist then it will be created. If C<create> is not
2462 set and the variable does not exist then NULL is returned.
2468 Perl_get_hv(pTHX_ const char *name, I32 create)
2470 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2479 =head1 CV Manipulation Functions
2481 =for apidoc p||get_cvn_flags
2483 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2484 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2485 exist then it will be declared (which has the same effect as saying
2486 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2487 then NULL is returned.
2489 =for apidoc p||get_cv
2491 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2497 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2499 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2500 /* XXX this is probably not what they think they're getting.
2501 * It has the same effect as "sub name;", i.e. just a forward
2503 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2504 SV *const sv = newSVpvn(name,len);
2505 SvFLAGS(sv) |= flags & SVf_UTF8;
2506 return newSUB(start_subparse(FALSE, 0),
2507 newSVOP(OP_CONST, 0, sv),
2516 Perl_get_cv(pTHX_ const char *name, I32 flags)
2518 return get_cvn_flags(name, strlen(name), flags);
2521 /* Be sure to refetch the stack pointer after calling these routines. */
2525 =head1 Callback Functions
2527 =for apidoc p||call_argv
2529 Performs a callback to the specified Perl sub. See L<perlcall>.
2535 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2537 /* See G_* flags in cop.h */
2538 /* null terminated arg list */
2546 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2551 return call_pv(sub_name, flags);
2555 =for apidoc p||call_pv
2557 Performs a callback to the specified Perl sub. See L<perlcall>.
2563 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2564 /* name of the subroutine */
2565 /* See G_* flags in cop.h */
2567 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2571 =for apidoc p||call_method
2573 Performs a callback to the specified Perl method. The blessed object must
2574 be on the stack. See L<perlcall>.
2580 Perl_call_method(pTHX_ const char *methname, I32 flags)
2581 /* name of the subroutine */
2582 /* See G_* flags in cop.h */
2584 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2587 /* May be called with any of a CV, a GV, or an SV containing the name. */
2589 =for apidoc p||call_sv
2591 Performs a callback to the Perl sub whose name is in the SV. See
2598 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2599 /* See G_* flags in cop.h */
2602 LOGOP myop; /* fake syntax tree node */
2607 bool oldcatch = CATCH_GET;
2609 OP* const oldop = PL_op;
2612 if (flags & G_DISCARD) {
2617 Zero(&myop, 1, LOGOP);
2618 myop.op_next = NULL;
2619 if (!(flags & G_NOARGS))
2620 myop.op_flags |= OPf_STACKED;
2621 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2622 (flags & G_ARRAY) ? OPf_WANT_LIST :
2627 EXTEND(PL_stack_sp, 1);
2628 *++PL_stack_sp = sv;
2630 oldscope = PL_scopestack_ix;
2632 if (PERLDB_SUB && PL_curstash != PL_debstash
2633 /* Handle first BEGIN of -d. */
2634 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2635 /* Try harder, since this may have been a sighandler, thus
2636 * curstash may be meaningless. */
2637 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2638 && !(flags & G_NODEBUG))
2639 PL_op->op_private |= OPpENTERSUB_DB;
2641 if (flags & G_METHOD) {
2642 Zero(&method_op, 1, UNOP);
2643 method_op.op_next = PL_op;
2644 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2645 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2646 PL_op = (OP*)&method_op;
2649 if (!(flags & G_EVAL)) {
2651 CALL_BODY_SUB((OP*)&myop);
2652 retval = PL_stack_sp - (PL_stack_base + oldmark);
2653 CATCH_SET(oldcatch);
2656 myop.op_other = (OP*)&myop;
2658 create_eval_scope(flags|G_FAKINGEVAL);
2666 CALL_BODY_SUB((OP*)&myop);
2667 retval = PL_stack_sp - (PL_stack_base + oldmark);
2668 if (!(flags & G_KEEPERR))
2669 sv_setpvn(ERRSV,"",0);
2675 /* my_exit() was called */
2676 PL_curstash = PL_defstash;
2679 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2680 Perl_croak(aTHX_ "Callback called exit");
2685 PL_op = PL_restartop;
2689 PL_stack_sp = PL_stack_base + oldmark;
2690 if (flags & G_ARRAY)
2694 *++PL_stack_sp = &PL_sv_undef;
2699 if (PL_scopestack_ix > oldscope)
2700 delete_eval_scope();
2704 if (flags & G_DISCARD) {
2705 PL_stack_sp = PL_stack_base + oldmark;
2714 /* Eval a string. The G_EVAL flag is always assumed. */
2717 =for apidoc p||eval_sv
2719 Tells Perl to C<eval> the string in the SV.
2725 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2727 /* See G_* flags in cop.h */
2731 UNOP myop; /* fake syntax tree node */
2732 VOL I32 oldmark = SP - PL_stack_base;
2735 OP* const oldop = PL_op;
2738 if (flags & G_DISCARD) {
2745 Zero(PL_op, 1, UNOP);
2746 EXTEND(PL_stack_sp, 1);
2747 *++PL_stack_sp = sv;
2749 if (!(flags & G_NOARGS))
2750 myop.op_flags = OPf_STACKED;
2751 myop.op_next = NULL;
2752 myop.op_type = OP_ENTEREVAL;
2753 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2754 (flags & G_ARRAY) ? OPf_WANT_LIST :
2756 if (flags & G_KEEPERR)
2757 myop.op_flags |= OPf_SPECIAL;
2759 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2760 * before a PUSHEVAL, which corrupts the stack after a croak */
2761 TAINT_PROPER("eval_sv()");
2767 CALL_BODY_EVAL((OP*)&myop);
2768 retval = PL_stack_sp - (PL_stack_base + oldmark);
2769 if (!(flags & G_KEEPERR))
2770 sv_setpvn(ERRSV,"",0);
2776 /* my_exit() was called */
2777 PL_curstash = PL_defstash;
2780 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2781 Perl_croak(aTHX_ "Callback called exit");
2786 PL_op = PL_restartop;
2790 PL_stack_sp = PL_stack_base + oldmark;
2791 if (flags & G_ARRAY)
2795 *++PL_stack_sp = &PL_sv_undef;
2801 if (flags & G_DISCARD) {
2802 PL_stack_sp = PL_stack_base + oldmark;
2812 =for apidoc p||eval_pv
2814 Tells Perl to C<eval> the given string and return an SV* result.
2820 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2824 SV* sv = newSVpv(p, 0);
2826 eval_sv(sv, G_SCALAR);
2833 if (croak_on_error && SvTRUE(ERRSV)) {
2834 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2840 /* Require a module. */
2843 =head1 Embedding Functions
2845 =for apidoc p||require_pv
2847 Tells Perl to C<require> the file named by the string argument. It is
2848 analogous to the Perl code C<eval "require '$file'">. It's even
2849 implemented that way; consider using load_module instead.
2854 Perl_require_pv(pTHX_ const char *pv)
2859 PUSHSTACKi(PERLSI_REQUIRE);
2861 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2862 eval_sv(sv_2mortal(sv), G_DISCARD);
2868 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2870 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2873 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2877 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2879 /* This message really ought to be max 23 lines.
2880 * Removed -h because the user already knows that option. Others? */
2882 static const char * const usage_msg[] = {
2883 "-0[octal] specify record separator (\\0, if no argument)",
2884 "-A[mod][=pattern] activate all/given assertions",
2885 "-a autosplit mode with -n or -p (splits $_ into @F)",
2886 "-C[number/list] enables the listed Unicode features",
2887 "-c check syntax only (runs BEGIN and CHECK blocks)",
2888 "-d[:debugger] run program under debugger",
2889 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2890 "-e program one line of program (several -e's allowed, omit programfile)",
2891 "-E program like -e, but enables all optional features",
2892 "-f don't do $sitelib/sitecustomize.pl at startup",
2893 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2894 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2895 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2896 "-l[octal] enable line ending processing, specifies line terminator",
2897 "-[mM][-]module execute \"use/no module...\" before executing program",
2898 "-n assume \"while (<>) { ... }\" loop around program",
2899 "-p assume loop like -n but print line also, like sed",
2900 "-P run program through C preprocessor before compilation",
2901 "-s enable rudimentary parsing for switches after programfile",
2902 "-S look for programfile using PATH environment variable",
2903 "-t enable tainting warnings",
2904 "-T enable tainting checks",
2905 "-u dump core after parsing program",
2906 "-U allow unsafe operations",
2907 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2908 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2909 "-w enable many useful warnings (RECOMMENDED)",
2910 "-W enable all warnings",
2911 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2912 "-X disable all warnings",
2916 const char * const *p = usage_msg;
2918 PerlIO_printf(PerlIO_stdout(),
2919 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2922 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2925 /* convert a string of -D options (or digits) into an int.
2926 * sets *s to point to the char after the options */
2930 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2932 static const char * const usage_msgd[] = {
2933 " Debugging flag values: (see also -d)",
2934 " p Tokenizing and parsing (with v, displays parse stack)",
2935 " s Stack snapshots (with v, displays all stacks)",
2936 " l Context (loop) stack processing",
2937 " t Trace execution",
2938 " o Method and overloading resolution",
2939 " c String/numeric conversions",
2940 " P Print profiling info, preprocessor command for -P, source file input state",
2941 " m Memory allocation",
2942 " f Format processing",
2943 " r Regular expression parsing and execution",
2944 " x Syntax tree dump",
2945 " u Tainting checks",
2946 " H Hash dump -- usurps values()",
2947 " X Scratchpad allocation",
2949 " S Thread synchronization",
2951 " R Include reference counts of dumped variables (eg when using -Ds)",
2952 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2953 " v Verbose: use in conjunction with other flags",
2955 " A Consistency checks on internal structures",
2956 " q quiet - currently only suppresses the 'EXECUTING' message",
2961 /* if adding extra options, remember to update DEBUG_MASK */
2962 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2964 for (; isALNUM(**s); (*s)++) {
2965 const char * const d = strchr(debopts,**s);
2967 i |= 1 << (d - debopts);
2968 else if (ckWARN_d(WARN_DEBUGGING))
2969 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2970 "invalid option -D%c, use -D'' to see choices\n", **s);
2973 else if (isDIGIT(**s)) {
2975 for (; isALNUM(**s); (*s)++) ;
2977 else if (givehelp) {
2978 const char *const *p = usage_msgd;
2979 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2982 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2983 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2984 "-Dp not implemented on this platform\n");
2990 /* This routine handles any switches that can be given during run */
2993 Perl_moreswitches(pTHX_ char *s)
3004 SvREFCNT_dec(PL_rs);
3005 if (s[1] == 'x' && s[2]) {
3006 const char *e = s+=2;
3012 flags = PERL_SCAN_SILENT_ILLDIGIT;
3013 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3014 if (s + numlen < e) {
3015 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3019 PL_rs = newSVpvs("");
3020 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3021 tmps = (U8*)SvPVX(PL_rs);
3022 uvchr_to_utf8(tmps, rschar);
3023 SvCUR_set(PL_rs, UNISKIP(rschar));
3028 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3029 if (rschar & ~((U8)~0))
3030 PL_rs = &PL_sv_undef;
3031 else if (!rschar && numlen >= 2)
3032 PL_rs = newSVpvs("");
3034 char ch = (char)rschar;
3035 PL_rs = newSVpvn(&ch, 1);
3038 sv_setsv(get_sv("/", TRUE), PL_rs);
3043 PL_unicode = parse_unicode_opts( (const char **)&s );
3044 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3050 while (*s && !isSPACE(*s)) ++s;
3051 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3062 forbid_setid('d', -1);
3065 /* -dt indicates to the debugger that threads will be used */
3066 if (*s == 't' && !isALNUM(s[1])) {
3068 my_setenv("PERL5DB_THREADED", "1");
3071 /* The following permits -d:Mod to accepts arguments following an =
3072 in the fashion that -MSome::Mod does. */
3073 if (*s == ':' || *s == '=') {
3075 SV * const sv = newSVpvs("use Devel::");
3077 /* We now allow -d:Module=Foo,Bar */
3078 while(isALNUM(*s) || *s==':') ++s;
3080 sv_catpv(sv, start);
3082 sv_catpvn(sv, start, s-start);
3083 /* Don't use NUL as q// delimiter here, this string goes in the
3085 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3088 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3091 PL_perldb = PERLDB_ALL;
3098 forbid_setid('D', -1);
3100 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3101 #else /* !DEBUGGING */
3102 if (ckWARN_d(WARN_DEBUGGING))
3103 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3104 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3105 for (s++; isALNUM(*s); s++) ;
3110 usage(PL_origargv[0]);
3113 Safefree(PL_inplace);
3114 #if defined(__CYGWIN__) /* do backup extension automagically */
3115 if (*(s+1) == '\0') {
3116 PL_inplace = savepvs(".bak");
3119 #endif /* __CYGWIN__ */
3121 const char * const start = ++s;
3122 while (*s && !isSPACE(*s))
3125 PL_inplace = savepvn(start, s - start);
3129 if (*s == '-') /* Additional switches on #! line. */
3133 case 'I': /* -I handled both here and in parse_body() */
3134 forbid_setid('I', -1);
3136 while (*s && isSPACE(*s))
3141 /* ignore trailing spaces (possibly followed by other switches) */
3143 for (e = p; *e && !isSPACE(*e); e++) ;
3147 } while (*p && *p != '-');
3148 e = savepvn(s, e-s);
3149 incpush(e, TRUE, TRUE, FALSE, FALSE);
3156 Perl_croak(aTHX_ "No directory specified for -I");
3162 SvREFCNT_dec(PL_ors_sv);
3168 PL_ors_sv = newSVpvs("\n");
3169 numlen = 3 + (*s == '0');
3170 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3174 if (RsPARA(PL_rs)) {
3175 PL_ors_sv = newSVpvs("\n\n");
3178 PL_ors_sv = newSVsv(PL_rs);
3183 forbid_setid('A', -1);
3186 char * const start = s;
3187 SV * const sv = newSVpvs("use assertions::activate");
3188 while(isALNUM(*s) || *s == ':') ++s;
3190 sv_catpvs(sv, "::");
3191 sv_catpvn(sv, start, s-start);
3194 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3197 else if (*s != '\0') {
3198 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3200 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3204 forbid_setid('M', -1); /* XXX ? */
3207 forbid_setid('m', -1); /* XXX ? */
3211 const char *use = "use ";
3212 /* -M-foo == 'no foo' */
3213 /* Leading space on " no " is deliberate, to make both
3214 possibilities the same length. */
3215 if (*s == '-') { use = " no "; ++s; }
3216 sv = newSVpvn(use,4);
3218 /* We allow -M'Module qw(Foo Bar)' */
3219 while(isALNUM(*s) || *s==':') ++s;
3221 sv_catpv(sv, start);
3222 if (*(start-1) == 'm') {
3224 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3225 sv_catpvs( sv, " ()");
3229 Perl_croak(aTHX_ "Module name required with -%c option",
3231 sv_catpvn(sv, start, s-start);
3232 sv_catpvs(sv, " split(/,/,q");
3233 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3235 sv_catpvs(sv, "\0)");
3238 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3241 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3252 forbid_setid('s', -1);
3253 PL_doswitches = TRUE;
3267 #ifdef MACOS_TRADITIONAL
3268 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3270 PL_do_undump = TRUE;
3278 if (!sv_derived_from(PL_patchlevel, "version"))
3279 upg_version(PL_patchlevel);
3281 PerlIO_printf(PerlIO_stdout(),
3282 Perl_form(aTHX_ "\nThis is perl, %"SVf
3283 #ifdef PERL_PATCHNUM
3284 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3287 SVfARG(vstringify(PL_patchlevel)),
3290 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3291 PerlIO_printf(PerlIO_stdout(),
3292 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3293 SVfARG(vstringify(PL_patchlevel))));
3294 PerlIO_printf(PerlIO_stdout(),
3295 Perl_form(aTHX_ " built under %s at %s %s\n",
3296 OSNAME, __DATE__, __TIME__));
3297 PerlIO_printf(PerlIO_stdout(),
3298 Perl_form(aTHX_ " OS Specific Release: %s\n",
3302 #if defined(LOCAL_PATCH_COUNT)
3303 if (LOCAL_PATCH_COUNT > 0)
3304 PerlIO_printf(PerlIO_stdout(),
3305 "\n(with %d registered patch%s, "
3306 "see perl -V for more detail)",
3308 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3311 PerlIO_printf(PerlIO_stdout(),
3312 "\n\nCopyright 1987-2007, Larry Wall\n");
3313 #ifdef MACOS_TRADITIONAL
3314 PerlIO_printf(PerlIO_stdout(),
3315 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3316 "maintained by Chris Nandor\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3325 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3328 PerlIO_printf(PerlIO_stdout(),
3329 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3330 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3333 PerlIO_printf(PerlIO_stdout(),
3334 "atariST series port, ++jrb bammi@cadence.com\n");
3337 PerlIO_printf(PerlIO_stdout(),
3338 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3341 PerlIO_printf(PerlIO_stdout(),
3342 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3357 PerlIO_printf(PerlIO_stdout(),
3358 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3361 PerlIO_printf(PerlIO_stdout(),
3362 "MiNT port by Guido Flohr, 1997-1999\n");
3365 PerlIO_printf(PerlIO_stdout(),
3366 "EPOC port by Olaf Flebbe, 1999-2002\n");
3369 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3370 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3373 #ifdef __SYMBIAN32__
3374 PerlIO_printf(PerlIO_stdout(),
3375 "Symbian port by Nokia, 2004-2005\n");
3377 #ifdef BINARY_BUILD_NOTICE
3378 BINARY_BUILD_NOTICE;
3380 PerlIO_printf(PerlIO_stdout(),
3382 Perl may be copied only under the terms of either the Artistic License or the\n\
3383 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3384 Complete documentation for Perl, including FAQ lists, should be found on\n\
3385 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3386 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3389 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3390 PL_dowarn |= G_WARN_ON;
3395 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3396 if (!specialWARN(PL_compiling.cop_warnings))
3397 PerlMemShared_free(PL_compiling.cop_warnings);
3398 PL_compiling.cop_warnings = pWARN_ALL ;
3402 PL_dowarn = G_WARN_ALL_OFF;
3403 if (!specialWARN(PL_compiling.cop_warnings))
3404 PerlMemShared_free(PL_compiling.cop_warnings);
3405 PL_compiling.cop_warnings = pWARN_NONE ;
3410 if (s[1] == '-') /* Additional switches on #! line. */
3415 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3421 #ifdef ALTERNATE_SHEBANG
3422 case 'S': /* OS/2 needs -S on "extproc" line. */
3430 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3435 /* compliments of Tom Christiansen */
3437 /* unexec() can be found in the Gnu emacs distribution */
3438 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3441 Perl_my_unexec(pTHX)
3443 PERL_UNUSED_CONTEXT;
3445 SV * prog = newSVpv(BIN_EXP, 0);
3446 SV * file = newSVpv(PL_origfilename, 0);
3450 sv_catpvs(prog, "/perl");
3451 sv_catpvs(file, ".perldump");
3453 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3454 /* unexec prints msg to stderr in case of failure */
3455 PerlProc_exit(status);
3458 # include <lib$routines.h>
3459 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3460 # elif defined(WIN32) || defined(__CYGWIN__)
3461 Perl_croak(aTHX_ "dump is not supported");
3463 ABORT(); /* for use with undump */
3468 /* initialize curinterp */
3474 # define PERLVAR(var,type)
3475 # define PERLVARA(var,n,type)
3476 # if defined(PERL_IMPLICIT_CONTEXT)
3477 # define PERLVARI(var,type,init) aTHX->var = init;
3478 # define PERLVARIC(var,type,init) aTHX->var = init;
3480 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3481 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3483 # include "intrpvar.h"
3484 # include "thrdvar.h"
3490 # define PERLVAR(var,type)
3491 # define PERLVARA(var,n,type)
3492 # define PERLVARI(var,type,init) PL_##var = init;
3493 # define PERLVARIC(var,type,init) PL_##var = init;
3494 # include "intrpvar.h"
3495 # include "thrdvar.h"
3502 /* As these are inside a structure, PERLVARI isn't capable of initialising
3504 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3505 PL_reg_poscache = PL_reg_starttry = NULL;
3509 S_init_main_stash(pTHX)
3514 PL_curstash = PL_defstash = newHV();
3515 /* We know that the string "main" will be in the global shared string
3516 table, so it's a small saving to use it rather than allocate another
3518 PL_curstname = newSVpvs_share("main");
3519 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3520 /* If we hadn't caused another reference to "main" to be in the shared
3521 string table above, then it would be worth reordering these two,
3522 because otherwise all we do is delete "main" from it as a consequence
3523 of the SvREFCNT_dec, only to add it again with hv_name_set */
3524 SvREFCNT_dec(GvHV(gv));
3525 hv_name_set(PL_defstash, "main", 4, 0);
3526 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3528 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3530 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3531 GvMULTI_on(PL_incgv);
3532 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3533 GvMULTI_on(PL_hintgv);
3534 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3535 SvREFCNT_inc_simple(PL_defgv);
3536 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3537 SvREFCNT_inc_simple(PL_errgv);
3538 GvMULTI_on(PL_errgv);
3539 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3540 GvMULTI_on(PL_replgv);
3541 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3542 #ifdef PERL_DONT_CREATE_GVSV
3545 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3546 sv_setpvn(ERRSV, "", 0);
3547 PL_curstash = PL_defstash;
3548 CopSTASH_set(&PL_compiling, PL_defstash);
3549 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3550 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3552 /* We must init $/ before switches are processed. */
3553 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3557 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3563 const char *cpp_discard_flag;
3572 PL_origfilename = savepvs("-e");
3575 /* if find_script() returns, it returns a malloc()-ed value */
3576 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3578 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3579 const char *s = scriptname + 8;
3585 * Tell apart "normal" usage of fdscript, e.g.
3586 * with bash on FreeBSD:
3587 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3588 * from usage in suidperl.
3589 * Does any "normal" usage leave garbage after the number???
3590 * Is it a mistake to use a similar /dev/fd/ construct for
3595 * Be supersafe and do some sanity-checks.
3596 * Still, can we be sure we got the right thing?
3599 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3602 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3604 scriptname = savepv(s + 1);
3605 Safefree(PL_origfilename);
3606 PL_origfilename = (char *)scriptname;
3611 CopFILE_free(PL_curcop);
3612 CopFILE_set(PL_curcop, PL_origfilename);
3613 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3614 scriptname = (char *)"";
3615 if (fdscript >= 0) {
3616 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3617 # if defined(HAS_FCNTL) && defined(F_SETFD)
3619 /* ensure close-on-exec */
3620 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3625 Perl_croak(aTHX_ "sperl needs fd script\n"
3626 "You should not call sperl directly; do you need to "
3627 "change a #! line\nfrom sperl to perl?\n");
3630 * Do not open (or do other fancy stuff) while setuid.
3631 * Perl does the open, and hands script to suidperl on a fd;
3632 * suidperl only does some checks, sets up UIDs and re-execs
3633 * perl with that fd as it has always done.
3636 if (*suidscript != 1) {
3637 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3640 else if (PL_preprocess) {
3641 const char * const cpp_cfg = CPPSTDIN;
3642 SV * const cpp = newSVpvs("");
3643 SV * const cmd = newSV(0);
3645 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3646 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3647 if (strEQ(cpp_cfg, "cppstdin"))
3648 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3649 sv_catpv(cpp, cpp_cfg);
3652 sv_catpvs(sv, "-I");
3653 sv_catpv(sv,PRIVLIB_EXP);
3656 DEBUG_P(PerlIO_printf(Perl_debug_log,
3657 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3658 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3661 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3668 cpp_discard_flag = "";
3670 cpp_discard_flag = "-C";
3674 perl = os2_execname(aTHX);
3676 perl = PL_origargv[0];
3680 /* This strips off Perl comments which might interfere with
3681 the C pre-processor, including #!. #line directives are
3682 deliberately stripped to avoid confusion with Perl's version
3683 of #line. FWP played some golf with it so it will fit
3684 into VMS's 255 character buffer.
3687 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3689 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3691 Perl_sv_setpvf(aTHX_ cmd, "\
3692 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3693 perl, quote, code, quote, scriptname, SVfARG(cpp),
3694 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3696 PL_doextract = FALSE;
3698 DEBUG_P(PerlIO_printf(Perl_debug_log,
3699 "PL_preprocess: cmd=\"%s\"\n",
3702 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3706 else if (!*scriptname) {
3707 forbid_setid(0, *suidscript);
3708 PL_rsfp = PerlIO_stdin();
3711 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3712 # if defined(HAS_FCNTL) && defined(F_SETFD)
3714 /* ensure close-on-exec */
3715 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3718 #endif /* IAMSUID */
3720 /* PSz 16 Sep 03 Keep neat error message */
3722 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3724 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3725 CopFILE(PL_curcop), Strerror(errno));
3731 * I_SYSSTATVFS HAS_FSTATVFS
3733 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3734 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3735 * here so that metaconfig picks them up. */
3739 S_fd_on_nosuid_fs(pTHX_ int fd)
3742 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3743 * but is needed also on machines without setreuid.
3744 * Seems safe enough to run as root.
3746 int check_okay = 0; /* able to do all the required sys/libcalls */
3747 int on_nosuid = 0; /* the fd is on a nosuid fs */
3749 * Need to check noexec also: nosuid might not be set, the average
3750 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3752 int on_noexec = 0; /* the fd is on a noexec fs */
3755 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3756 * fstatvfs() is UNIX98.
3757 * fstatfs() is 4.3 BSD.
3758 * ustat()+getmnt() is pre-4.3 BSD.
3759 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3760 * an irrelevant filesystem while trying to reach the right one.
3763 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3765 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3766 defined(HAS_FSTATVFS)
3767 # define FD_ON_NOSUID_CHECK_OKAY
3768 struct statvfs stfs;
3770 check_okay = fstatvfs(fd, &stfs) == 0;
3771 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3773 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3774 on platforms where it is present. */
3775 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3777 # endif /* fstatvfs */
3779 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3780 defined(PERL_MOUNT_NOSUID) && \
3781 defined(PERL_MOUNT_NOEXEC) && \
3782 defined(HAS_FSTATFS) && \
3783 defined(HAS_STRUCT_STATFS) && \
3784 defined(HAS_STRUCT_STATFS_F_FLAGS)
3785 # define FD_ON_NOSUID_CHECK_OKAY
3788 check_okay = fstatfs(fd, &stfs) == 0;
3789 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3790 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3791 # endif /* fstatfs */
3793 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3794 defined(PERL_MOUNT_NOSUID) && \
3795 defined(PERL_MOUNT_NOEXEC) && \
3796 defined(HAS_FSTAT) && \
3797 defined(HAS_USTAT) && \
3798 defined(HAS_GETMNT) && \
3799 defined(HAS_STRUCT_FS_DATA) && \
3801 # define FD_ON_NOSUID_CHECK_OKAY
3804 if (fstat(fd, &fdst) == 0) {
3806 if (ustat(fdst.st_dev, &us) == 0) {
3808 /* NOSTAT_ONE here because we're not examining fields which
3809 * vary between that case and STAT_ONE. */
3810 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3811 size_t cmplen = sizeof(us.f_fname);
3812 if (sizeof(fsd.fd_req.path) < cmplen)
3813 cmplen = sizeof(fsd.fd_req.path);
3814 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3815 fdst.st_dev == fsd.fd_req.dev) {
3817 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3818 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3823 # endif /* fstat+ustat+getmnt */
3825 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3826 defined(HAS_GETMNTENT) && \
3827 defined(HAS_HASMNTOPT) && \
3828 defined(MNTOPT_NOSUID) && \
3829 defined(MNTOPT_NOEXEC)
3830 # define FD_ON_NOSUID_CHECK_OKAY
3831 FILE *mtab = fopen("/etc/mtab", "r");
3832 struct mntent *entry;
3835 if (mtab && (fstat(fd, &stb) == 0)) {
3836 while (entry = getmntent(mtab)) {
3837 if (stat(entry->mnt_dir, &fsb) == 0
3838 && fsb.st_dev == stb.st_dev)
3840 /* found the filesystem */
3842 if (hasmntopt(entry, MNTOPT_NOSUID))
3844 if (hasmntopt(entry, MNTOPT_NOEXEC))
3847 } /* A single fs may well fail its stat(). */
3852 # endif /* getmntent+hasmntopt */
3855 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3857 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3859 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3860 return ((!check_okay) || on_nosuid || on_noexec);
3862 #endif /* IAMSUID */
3865 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3866 int fdscript, int suidscript)
3871 #endif /* IAMSUID */
3873 /* do we need to emulate setuid on scripts? */
3875 /* This code is for those BSD systems that have setuid #! scripts disabled
3876 * in the kernel because of a security problem. Merely defining DOSUID
3877 * in perl will not fix that problem, but if you have disabled setuid
3878 * scripts in the kernel, this will attempt to emulate setuid and setgid
3879 * on scripts that have those now-otherwise-useless bits set. The setuid
3880 * root version must be called suidperl or sperlN.NNN. If regular perl
3881 * discovers that it has opened a setuid script, it calls suidperl with
3882 * the same argv that it had. If suidperl finds that the script it has
3883 * just opened is NOT setuid root, it sets the effective uid back to the
3884 * uid. We don't just make perl setuid root because that loses the
3885 * effective uid we had before invoking perl, if it was different from the
3888 * Description/comments above do not match current workings:
3889 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3890 * suidperl called with script open and name changed to /dev/fd/N/X;
3891 * suidperl croaks if script is not setuid;
3892 * making perl setuid would be a huge security risk (and yes, that
3893 * would lose any euid we might have had).
3895 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3896 * be defined in suidperl only. suidperl must be setuid root. The
3897 * Configure script will set this up for you if you want it.
3903 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3904 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3905 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3907 const char *linestr;
3911 if (fdscript < 0 || suidscript != 1)
3912 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3914 * Since the script is opened by perl, not suidperl, some of these
3915 * checks are superfluous. Leaving them in probably does not lower
3919 * Do checks even for systems with no HAS_SETREUID.
3920 * We used to swap, then re-swap UIDs with
3922 if (setreuid(PL_euid,PL_uid) < 0
3923 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3924 Perl_croak(aTHX_ "Can't swap uid and euid");
3927 if (setreuid(PL_uid,PL_euid) < 0
3928 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3929 Perl_croak(aTHX_ "Can't reswap uid and euid");
3933 /* On this access check to make sure the directories are readable,
3934 * there is actually a small window that the user could use to make
3935 * filename point to an accessible directory. So there is a faint
3936 * chance that someone could execute a setuid script down in a
3937 * non-accessible directory. I don't know what to do about that.
3938 * But I don't think it's too important. The manual lies when
3939 * it says access() is useful in setuid programs.
3941 * So, access() is pretty useless... but not harmful... do anyway.
3943 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3944 Perl_croak(aTHX_ "Can't access() script\n");
3947 /* If we can swap euid and uid, then we can determine access rights
3948 * with a simple stat of the file, and then compare device and
3949 * inode to make sure we did stat() on the same file we opened.
3950 * Then we just have to make sure he or she can execute it.
3953 * As the script is opened by perl, not suidperl, we do not need to
3954 * care much about access rights.
3956 * The 'script changed' check is needed, or we can get lied to
3957 * about $0 with e.g.
3958 * suidperl /dev/fd/4//bin/x 4<setuidscript
3959 * Without HAS_SETREUID, is it safe to stat() as root?
3961 * Are there any operating systems that pass /dev/fd/xxx for setuid
3962 * scripts, as suggested/described in perlsec(1)? Surely they do not
3963 * pass the script name as we do, so the "script changed" test would
3964 * fail for them... but we never get here with
3965 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3967 * This is one place where we must "lie" about return status: not
3968 * say if the stat() failed. We are doing this as root, and could
3969 * be tricked into reporting existence or not of files that the
3970 * "plain" user cannot even see.
3974 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3975 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3976 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3977 Perl_croak(aTHX_ "Setuid script changed\n");
3981 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3982 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3985 * We used to do this check as the "plain" user (after swapping
3986 * UIDs). But the check for nosuid and noexec filesystem is needed,
3987 * and should be done even without HAS_SETREUID. (Maybe those
3988 * operating systems do not have such mount options anyway...)
3989 * Seems safe enough to do as root.
3991 #if !defined(NO_NOSUID_CHECK)
3992 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3993 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3996 #endif /* IAMSUID */
3998 if (!S_ISREG(PL_statbuf.st_mode)) {
3999 Perl_croak(aTHX_ "Setuid script not plain file\n");
4001 if (PL_statbuf.st_mode & S_IWOTH)
4002 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4003 PL_doswitches = FALSE; /* -s is insecure in suid */
4004 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4005 CopLINE_inc(PL_curcop);
4006 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4007 Perl_croak(aTHX_ "No #! line");
4008 linestr = SvPV_nolen_const(PL_linestr);
4009 /* required even on Sys V */
4010 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4011 Perl_croak(aTHX_ "No #! line");
4015 /* Sanity check on line length */
4016 s_end = s + strlen(s);
4017 if (s_end == s || (s_end - s) > 4000)
4018 Perl_croak(aTHX_ "Very long #! line");
4019 /* Allow more than a single space after #! */
4020 while (isSPACE(*s)) s++;
4021 /* Sanity check on buffer end */
4022 while ((*s) && !isSPACE(*s)) s++;
4023 for (s2 = s; (s2 > linestr &&
4024 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4025 || s2[-1] == '-')); s2--) ;
4026 /* Sanity check on buffer start */
4027 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4028 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4029 Perl_croak(aTHX_ "Not a perl script");
4030 while (*s == ' ' || *s == '\t') s++;
4032 * #! arg must be what we saw above. They can invoke it by
4033 * mentioning suidperl explicitly, but they may not add any strange
4034 * arguments beyond what #! says if they do invoke suidperl that way.
4037 * The way validarg was set up, we rely on the kernel to start
4038 * scripts with argv[1] set to contain all #! line switches (the
4042 * Check that we got all the arguments listed in the #! line (not
4043 * just that there are no extraneous arguments). Might not matter
4044 * much, as switches from #! line seem to be acted upon (also), and
4045 * so may be checked and trapped in perl. But, security checks must
4046 * be done in suidperl and not deferred to perl. Note that suidperl
4047 * does not get around to parsing (and checking) the switches on
4048 * the #! line (but execs perl sooner).
4049 * Allow (require) a trailing newline (which may be of two
4050 * characters on some architectures?) (but no other trailing
4053 len = strlen(validarg);
4054 if (strEQ(validarg," PHOOEY ") ||
4055 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4056 !((s_end - s) == len+1
4057 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4058 Perl_croak(aTHX_ "Args must match #! line");
4062 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4063 PL_euid == PL_statbuf.st_uid)
4065 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4066 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4067 #endif /* IAMSUID */
4070 PL_euid) { /* oops, we're not the setuid root perl */
4072 * When root runs a setuid script, we do not go through the same
4073 * steps of execing sperl and then perl with fd scripts, but
4074 * simply set up UIDs within the same perl invocation; so do
4075 * not have the same checks (on options, whatever) that we have
4076 * for plain users. No problem really: would have to be a script
4077 * that does not actually work for plain users; and if root is
4078 * foolish and can be persuaded to run such an unsafe script, he
4079 * might run also non-setuid ones, and deserves what he gets.
4081 * Or, we might drop the PL_euid check above (and rely just on
4082 * fdscript to avoid loops), and do the execs
4088 * Pass fd script to suidperl.
4089 * Exec suidperl, substituting fd script for scriptname.
4090 * Pass script name as "subdir" of fd, which perl will grok;
4091 * in fact will use that to distinguish this from "normal"
4092 * usage, see comments above.
4094 PerlIO_rewind(PL_rsfp);
4095 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4096 /* PSz 27 Feb 04 Sanity checks on scriptname */
4097 if ((!scriptname) || (!*scriptname) ) {
4098 Perl_croak(aTHX_ "No setuid script name\n");
4100 if (*scriptname == '-') {
4101 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4102 /* Or we might confuse it with an option when replacing
4103 * name in argument list, below (though we do pointer, not
4104 * string, comparisons).
4107 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4108 if (!PL_origargv[which]) {
4109 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4111 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4112 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4113 #if defined(HAS_FCNTL) && defined(F_SETFD)
4114 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4117 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4118 (int)PERL_REVISION, (int)PERL_VERSION,
4119 (int)PERL_SUBVERSION), PL_origargv);
4121 #endif /* IAMSUID */
4122 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4125 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4127 * This seems back to front: we try HAS_SETEGID first; if not available
4128 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4129 * in the sense that we only want to set EGID; but are there any machines
4130 * with either of the latter, but not the former? Same with UID, later.
4133 (void)setegid(PL_statbuf.st_gid);
4136 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4138 #ifdef HAS_SETRESGID
4139 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4141 PerlProc_setgid(PL_statbuf.st_gid);
4145 if (PerlProc_getegid() != PL_statbuf.st_gid)
4146 Perl_croak(aTHX_ "Can't do setegid!\n");
4148 if (PL_statbuf.st_mode & S_ISUID) {
4149 if (PL_statbuf.st_uid != PL_euid)
4151 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4154 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4156 #ifdef HAS_SETRESUID
4157 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4159 PerlProc_setuid(PL_statbuf.st_uid);
4163 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4164 Perl_croak(aTHX_ "Can't do seteuid!\n");
4166 else if (PL_uid) { /* oops, mustn't run as root */
4168 (void)seteuid((Uid_t)PL_uid);
4171 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4173 #ifdef HAS_SETRESUID
4174 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4176 PerlProc_setuid((Uid_t)PL_uid);
4180 if (PerlProc_geteuid() != PL_uid)
4181 Perl_croak(aTHX_ "Can't do seteuid!\n");
4184 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4185 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4188 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4189 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4190 else if (fdscript < 0 || suidscript != 1)
4191 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4192 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4194 /* PSz 16 Sep 03 Keep neat error message */
4195 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4198 /* We absolutely must clear out any saved ids here, so we */
4199 /* exec the real perl, substituting fd script for scriptname. */
4200 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4202 * It might be thought that using setresgid and/or setresuid (changed to
4203 * set the saved IDs) above might obviate the need to exec, and we could
4204 * go on to "do the perl thing".
4206 * Is there such a thing as "saved GID", and is that set for setuid (but
4207 * not setgid) execution like suidperl? Without exec, it would not be
4208 * cleared for setuid (but not setgid) scripts (or might need a dummy
4211 * We need suidperl to do the exact same argument checking that perl
4212 * does. Thus it cannot be very small; while it could be significantly
4213 * smaller, it is safer (simpler?) to make it essentially the same
4214 * binary as perl (but they are not identical). - Maybe could defer that
4215 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4216 * but prefer to do thorough checks in suidperl itself. Such deferral
4217 * would make suidperl security rely on perl, a design no-no.
4219 * Setuid things should be short and simple, thus easy to understand and
4220 * verify. They should do their "own thing", without influence by
4221 * attackers. It may help if their internal execution flow is fixed,
4222 * regardless of platform: it may be best to exec anyway.
4224 * Suidperl should at least be conceptually simple: a wrapper only,
4225 * never to do any real perl. Maybe we should put
4227 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4229 * into the perly bits.
4231 PerlIO_rewind(PL_rsfp);
4232 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4234 * Keep original arguments: suidperl already has fd script.
4236 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4237 /* if (!PL_origargv[which]) { */
4238 /* errno = EPERM; */
4239 /* Perl_croak(aTHX_ "Permission denied\n"); */
4241 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4242 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4243 #if defined(HAS_FCNTL) && defined(F_SETFD)
4244 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4247 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4248 (int)PERL_REVISION, (int)PERL_VERSION,
4249 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4251 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4252 #endif /* IAMSUID */
4254 PERL_UNUSED_ARG(fdscript);
4255 PERL_UNUSED_ARG(suidscript);
4256 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4257 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4258 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4259 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4261 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4264 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4265 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4266 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4267 /* not set-id, must be wrapped */
4270 PERL_UNUSED_ARG(validarg);
4271 PERL_UNUSED_ARG(scriptname);
4275 S_find_beginning(pTHX)
4279 register const char *s2;
4280 #ifdef MACOS_TRADITIONAL
4284 /* skip forward in input to the real script? */
4286 #ifdef MACOS_TRADITIONAL
4287 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4289 while (PL_doextract || gMacPerl_AlwaysExtract) {
4290 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4291 if (!gMacPerl_AlwaysExtract)
4292 Perl_croak(aTHX_ "No Perl script found in input\n");
4294 if (PL_doextract) /* require explicit override ? */
4295 if (!OverrideExtract(PL_origfilename))
4296 Perl_croak(aTHX_ "User aborted script\n");
4298 PL_doextract = FALSE;
4300 /* Pater peccavi, file does not have #! */
4301 PerlIO_rewind(PL_rsfp);
4306 while (PL_doextract) {
4307 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4308 Perl_croak(aTHX_ "No Perl script found in input\n");
4311 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4312 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4313 PL_doextract = FALSE;
4314 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4316 while (*s == ' ' || *s == '\t') s++;
4318 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4319 || s2[-1] == '_') s2--;
4320 if (strnEQ(s2-4,"perl",4))
4321 while ((s = moreswitches(s)))
4324 #ifdef MACOS_TRADITIONAL
4325 /* We are always searching for the #!perl line in MacPerl,
4326 * so if we find it, still keep the line count correct
4327 * by counting lines we already skipped over
4329 for (; maclines > 0 ; maclines--)
4330 PerlIO_ungetc(PL_rsfp, '\n');
4334 /* gMacPerl_AlwaysExtract is false in MPW tool */
4335 } else if (gMacPerl_AlwaysExtract) {
4347 PL_uid = PerlProc_getuid();
4348 PL_euid = PerlProc_geteuid();
4349 PL_gid = PerlProc_getgid();
4350 PL_egid = PerlProc_getegid();
4352 PL_uid |= PL_gid << 16;
4353 PL_euid |= PL_egid << 16;
4355 /* Should not happen: */
4356 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4357 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4360 * Should go by suidscript, not uid!=euid: why disallow
4361 * system("ls") in scripts run from setuid things?
4362 * Or, is this run before we check arguments and set suidscript?
4363 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4364 * (We never have suidscript, can we be sure to have fdscript?)
4365 * Or must then go by UID checks? See comments in forbid_setid also.
4369 /* This is used very early in the lifetime of the program,
4370 * before even the options are parsed, so PL_tainting has
4371 * not been initialized properly. */
4373 Perl_doing_taint(int argc, char *argv[], char *envp[])
4375 #ifndef PERL_IMPLICIT_SYS
4376 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4377 * before we have an interpreter-- and the whole point of this
4378 * function is to be called at such an early stage. If you are on
4379 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4380 * "tainted because running with altered effective ids', you'll
4381 * have to add your own checks somewhere in here. The two most
4382 * known samples of 'implicitness' are Win32 and NetWare, neither
4383 * of which has much of concept of 'uids'. */
4384 int uid = PerlProc_getuid();
4385 int euid = PerlProc_geteuid();
4386 int gid = PerlProc_getgid();
4387 int egid = PerlProc_getegid();
4394 if (uid && (euid != uid || egid != gid))
4396 #endif /* !PERL_IMPLICIT_SYS */
4397 /* This is a really primitive check; environment gets ignored only
4398 * if -T are the first chars together; otherwise one gets
4399 * "Too late" message. */
4400 if ( argc > 1 && argv[1][0] == '-'
4401 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4406 /* Passing the flag as a single char rather than a string is a slight space
4407 optimisation. The only message that isn't /^-.$/ is
4408 "program input from stdin", which is substituted in place of '\0', which
4409 could never be a command line flag. */
4411 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4414 char string[3] = "-x";
4415 const char *message = "program input from stdin";
4422 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4423 if (PL_euid != PL_uid)
4424 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4425 if (PL_egid != PL_gid)
4426 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4427 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4429 * Checks for UID/GID above "wrong": why disallow
4430 * perl -e 'print "Hello\n"'
4431 * from within setuid things?? Simply drop them: replaced by
4432 * fdscript/suidscript and #ifdef IAMSUID checks below.
4434 * This may be too late for command-line switches. Will catch those on
4435 * the #! line, after finding the script name and setting up
4436 * fdscript/suidscript. Note that suidperl does not get around to
4437 * parsing (and checking) the switches on the #! line, but checks that
4438 * the two sets are identical.
4440 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4441 * instead, or would that be "too late"? (We never have suidscript, can
4442 * we be sure to have fdscript?)
4444 * Catch things with suidscript (in descendant of suidperl), even with
4445 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4446 * below; but I am paranoid.
4448 * Also see comments about root running a setuid script, elsewhere.
4450 if (suidscript >= 0)
4451 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4453 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4454 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4455 #endif /* IAMSUID */
4459 Perl_init_debugger(pTHX)
4462 HV * const ostash = PL_curstash;
4464 PL_curstash = PL_debstash;
4465 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4467 AvREAL_off(PL_dbargs);
4468 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4469 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4470 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4471 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4472 sv_setiv(PL_DBsingle, 0);
4473 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4474 sv_setiv(PL_DBtrace, 0);
4475 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4476 sv_setiv(PL_DBsignal, 0);
4477 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4478 sv_setiv(PL_DBassertion, 0);
4479 PL_curstash = ostash;
4482 #ifndef STRESS_REALLOC
4483 #define REASONABLE(size) (size)
4485 #define REASONABLE(size) (1) /* unreasonable */
4489 Perl_init_stacks(pTHX)
4492 /* start with 128-item stack and 8K cxstack */
4493 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4494 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4495 PL_curstackinfo->si_type = PERLSI_MAIN;
4496 PL_curstack = PL_curstackinfo->si_stack;
4497 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4499 PL_stack_base = AvARRAY(PL_curstack);
4500 PL_stack_sp = PL_stack_base;
4501 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4503 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4506 PL_tmps_max = REASONABLE(128);
4508 Newx(PL_markstack,REASONABLE(32),I32);
4509 PL_markstack_ptr = PL_markstack;
4510 PL_markstack_max = PL_markstack + REASONABLE(32);
4514 Newx(PL_scopestack,REASONABLE(32),I32);
4515 PL_scopestack_ix = 0;
4516 PL_scopestack_max = REASONABLE(32);
4518 Newx(PL_savestack,REASONABLE(128),ANY);
4519 PL_savestack_ix = 0;
4520 PL_savestack_max = REASONABLE(128);
4529 while (PL_curstackinfo->si_next)
4530 PL_curstackinfo = PL_curstackinfo->si_next;
4531 while (PL_curstackinfo) {
4532 PERL_SI *p = PL_curstackinfo->si_prev;
4533 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4534 Safefree(PL_curstackinfo->si_cxstack);
4535 Safefree(PL_curstackinfo);
4536 PL_curstackinfo = p;
4538 Safefree(PL_tmps_stack);
4539 Safefree(PL_markstack);
4540 Safefree(PL_scopestack);
4541 Safefree(PL_savestack);
4551 lex_start(PL_linestr);
4553 PL_subname = newSVpvs("main");
4557 S_init_predump_symbols(pTHX)
4563 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4564 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4565 GvMULTI_on(PL_stdingv);
4566 io = GvIOp(PL_stdingv);
4567 IoTYPE(io) = IoTYPE_RDONLY;
4568 IoIFP(io) = PerlIO_stdin();
4569 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4573 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4576 IoTYPE(io) = IoTYPE_WRONLY;
4577 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4579 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4581 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4583 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4584 GvMULTI_on(PL_stderrgv);
4585 io = GvIOp(PL_stderrgv);
4586 IoTYPE(io) = IoTYPE_WRONLY;
4587 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4588 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4590 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4592 PL_statname = newSV(0); /* last filename we did stat on */
4594 Safefree(PL_osname);
4595 PL_osname = savepv(OSNAME);
4599 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4602 argc--,argv++; /* skip name of script */
4603 if (PL_doswitches) {
4604 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4608 if (argv[0][1] == '-' && !argv[0][2]) {
4612 if ((s = strchr(argv[0], '='))) {
4613 const char *const start_name = argv[0] + 1;
4614 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4615 TRUE, SVt_PV)), s + 1);
4618 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4621 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4622 GvMULTI_on(PL_argvgv);
4623 (void)gv_AVadd(PL_argvgv);
4624 av_clear(GvAVn(PL_argvgv));
4625 for (; argc > 0; argc--,argv++) {
4626 SV * const sv = newSVpv(argv[0],0);
4627 av_push(GvAVn(PL_argvgv),sv);
4628 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4629 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4632 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4633 (void)sv_utf8_decode(sv);
4639 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4644 PL_toptarget = newSV(0);
4645 sv_upgrade(PL_toptarget, SVt_PVFM);
4646 sv_setpvn(PL_toptarget, "", 0);
4647 PL_bodytarget = newSV(0);
4648 sv_upgrade(PL_bodytarget, SVt_PVFM);
4649 sv_setpvn(PL_bodytarget, "", 0);
4650 PL_formtarget = PL_bodytarget;
4654 init_argv_symbols(argc,argv);
4656 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4657 #ifdef MACOS_TRADITIONAL
4658 /* $0 is not majick on a Mac */
4659 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4661 sv_setpv(GvSV(tmpgv),PL_origfilename);
4662 magicname("0", "0", 1);
4665 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4667 bool env_is_not_environ;
4668 GvMULTI_on(PL_envgv);
4669 hv = GvHVn(PL_envgv);
4670 hv_magic(hv, NULL, PERL_MAGIC_env);
4672 #ifdef USE_ENVIRON_ARRAY
4673 /* Note that if the supplied env parameter is actually a copy
4674 of the global environ then it may now point to free'd memory
4675 if the environment has been modified since. To avoid this
4676 problem we treat env==NULL as meaning 'use the default'
4680 env_is_not_environ = env != environ;
4681 if (env_is_not_environ
4682 # ifdef USE_ITHREADS
4683 && PL_curinterp == aTHX
4690 char** origenv = environ;
4693 for (; *env; env++) {
4694 if (!(s = strchr(*env,'=')) || s == *env)
4696 #if defined(MSDOS) && !defined(DJGPP)
4701 sv = newSVpv(s+1, 0);
4702 (void)hv_store(hv, *env, s - *env, sv, 0);
4703 if (env_is_not_environ)
4705 if (origenv != environ) {
4706 /* realloc has shifted us */
4707 env = (env - origenv) + environ;
4712 #endif /* USE_ENVIRON_ARRAY */
4713 #endif /* !PERL_MICRO */
4716 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4717 SvREADONLY_off(GvSV(tmpgv));
4718 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4719 SvREADONLY_on(GvSV(tmpgv));
4721 #ifdef THREADS_HAVE_PIDS
4722 PL_ppid = (IV)getppid();
4725 /* touch @F array to prevent spurious warnings 20020415 MJD */
4727 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4729 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4730 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4731 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4735 S_init_perllib(pTHX)
4741 s = PerlEnv_getenv("PERL5LIB");
4743 * It isn't possible to delete an environment variable with
4744 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4745 * case we treat PERL5LIB as undefined if it has a zero-length value.
4747 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4748 if (s && *s != '\0')
4752 incpush(s, TRUE, TRUE, TRUE, FALSE);
4754 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4756 /* Treat PERL5?LIB as a possible search list logical name -- the
4757 * "natural" VMS idiom for a Unix path string. We allow each
4758 * element to be a set of |-separated directories for compatibility.
4762 if (my_trnlnm("PERL5LIB",buf,0))
4763 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4765 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4769 /* Use the ~-expanded versions of APPLLIB (undocumented),
4770 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4773 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4777 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4779 #ifdef MACOS_TRADITIONAL
4782 SV * privdir = newSV(0);
4783 char * macperl = PerlEnv_getenv("MACPERL");
4788 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4789 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4790 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4791 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4792 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4793 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4795 SvREFCNT_dec(privdir);
4798 incpush(":", FALSE, FALSE, TRUE, FALSE);
4801 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4804 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4806 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4810 /* sitearch is always relative to sitelib on Windows for
4811 * DLL-based path intuition to work correctly */
4812 # if !defined(WIN32)
4813 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4819 /* this picks up sitearch as well */
4820 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4822 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4826 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4827 /* Search for version-specific dirs below here */
4828 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4831 #ifdef PERL_VENDORARCH_EXP
4832 /* vendorarch is always relative to vendorlib on Windows for
4833 * DLL-based path intuition to work correctly */
4834 # if !defined(WIN32)
4835 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4839 #ifdef PERL_VENDORLIB_EXP
4841 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4843 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4847 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4848 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4851 #ifdef PERL_OTHERLIBDIRS
4852 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4856 incpush(".", FALSE, FALSE, TRUE, FALSE);
4857 #endif /* MACOS_TRADITIONAL */
4860 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4861 # define PERLLIB_SEP ';'
4864 # define PERLLIB_SEP '|'
4866 # if defined(MACOS_TRADITIONAL)
4867 # define PERLLIB_SEP ','
4869 # define PERLLIB_SEP ':'
4873 #ifndef PERLLIB_MANGLE
4874 # define PERLLIB_MANGLE(s,n) (s)
4877 /* Push a directory onto @INC if it exists.
4878 Generate a new SV if we do this, to save needing to copy the SV we push
4881 S_incpush_if_exists(pTHX_ SV *dir)
4885 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4886 S_ISDIR(tmpstatbuf.st_mode)) {
4887 av_push(GvAVn(PL_incgv), dir);
4894 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4899 const char *p = dir;
4904 if (addsubdirs || addoldvers) {
4908 /* Break at all separators */
4910 SV *libdir = newSV(0);
4913 /* skip any consecutive separators */
4915 while ( *p == PERLLIB_SEP ) {
4916 /* Uncomment the next line for PATH semantics */
4917 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4922 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4923 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4928 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4929 p = NULL; /* break out */
4931 #ifdef MACOS_TRADITIONAL
4932 if (!strchr(SvPVX(libdir), ':')) {
4935 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4937 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4938 sv_catpvs(libdir, ":");
4941 /* Do the if() outside the #ifdef to avoid warnings about an unused
4944 #ifdef PERL_RELOCATABLE_INC
4946 * Relocatable include entries are marked with a leading .../
4949 * 0: Remove that leading ".../"
4950 * 1: Remove trailing executable name (anything after the last '/')
4951 * from the perl path to give a perl prefix
4953 * While the @INC element starts "../" and the prefix ends with a real
4954 * directory (ie not . or ..) chop that real directory off the prefix
4955 * and the leading "../" from the @INC element. ie a logical "../"
4957 * Finally concatenate the prefix and the remainder of the @INC element
4958 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4959 * generates /usr/local/lib/perl5
4961 const char *libpath = SvPVX(libdir);
4962 STRLEN libpath_len = SvCUR(libdir);
4963 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4965 SV * const caret_X = get_sv("\030", 0);
4966 /* Going to use the SV just as a scratch buffer holding a C
4972 /* $^X is *the* source of taint if tainting is on, hence
4973 SvPOK() won't be true. */
4975 assert(SvPOKp(caret_X));
4976 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4977 /* Firstly take off the leading .../
4978 If all else fail we'll do the paths relative to the current
4980 sv_chop(libdir, libpath + 4);
4981 /* Don't use SvPV as we're intentionally bypassing taining,
4982 mortal copies that the mg_get of tainting creates, and
4983 corruption that seems to come via the save stack.
4984 I guess that the save stack isn't correctly set up yet. */
4985 libpath = SvPVX(libdir);
4986 libpath_len = SvCUR(libdir);
4988 /* This would work more efficiently with memrchr, but as it's
4989 only a GNU extension we'd need to probe for it and
4990 implement our own. Not hard, but maybe not worth it? */
4992 prefix = SvPVX(prefix_sv);
4993 lastslash = strrchr(prefix, '/');
4995 /* First time in with the *lastslash = '\0' we just wipe off
4996 the trailing /perl from (say) /usr/foo/bin/perl
5000 while ((*lastslash = '\0'), /* Do that, come what may. */
5001 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5002 && (lastslash = strrchr(prefix, '/')))) {
5003 if (lastslash[1] == '\0'
5004 || (lastslash[1] == '.'
5005 && (lastslash[2] == '/' /* ends "/." */
5006 || (lastslash[2] == '/'
5007 && lastslash[3] == '/' /* or "/.." */
5009 /* Prefix ends "/" or "/." or "/..", any of which
5010 are fishy, so don't do any more logical cleanup.
5014 /* Remove leading "../" from path */
5017 /* Next iteration round the loop removes the last
5018 directory name from prefix by writing a '\0' in
5019 the while clause. */
5021 /* prefix has been terminated with a '\0' to the correct
5022 length. libpath points somewhere into the libdir SV.
5023 We need to join the 2 with '/' and drop the result into
5025 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5026 SvREFCNT_dec(libdir);
5027 /* And this is the new libdir. */
5030 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5031 /* Need to taint reloccated paths if running set ID */
5032 SvTAINTED_on(libdir);
5035 SvREFCNT_dec(prefix_sv);
5040 * BEFORE pushing libdir onto @INC we may first push version- and
5041 * archname-specific sub-directories.
5043 if (addsubdirs || addoldvers) {
5044 #ifdef PERL_INC_VERSION_LIST
5045 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5046 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5047 const char * const *incver;
5053 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5055 while (unix[len-1] == '/') len--; /* Cosmetic */
5056 sv_usepvn(libdir,unix,len);
5059 PerlIO_printf(Perl_error_log,
5060 "Failed to unixify @INC element \"%s\"\n",
5064 #ifdef MACOS_TRADITIONAL
5065 #define PERL_AV_SUFFIX_FMT ""
5066 #define PERL_ARCH_FMT "%s:"
5067 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5069 #define PERL_AV_SUFFIX_FMT "/"
5070 #define PERL_ARCH_FMT "/%s"
5071 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5073 /* .../version/archname if -d .../version/archname */
5074 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5076 (int)PERL_REVISION, (int)PERL_VERSION,
5077 (int)PERL_SUBVERSION, ARCHNAME);
5078 subdir = S_incpush_if_exists(aTHX_ subdir);
5080 /* .../version if -d .../version */
5081 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5083 (int)PERL_REVISION, (int)PERL_VERSION,
5084 (int)PERL_SUBVERSION);
5085 subdir = S_incpush_if_exists(aTHX_ subdir);
5087 /* .../archname if -d .../archname */
5088 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5089 SVfARG(libdir), ARCHNAME);
5090 subdir = S_incpush_if_exists(aTHX_ subdir);
5094 #ifdef PERL_INC_VERSION_LIST
5096 for (incver = incverlist; *incver; incver++) {
5097 /* .../xxx if -d .../xxx */
5098 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5099 SVfARG(libdir), *incver);
5100 subdir = S_incpush_if_exists(aTHX_ subdir);
5106 /* finally push this lib directory on the end of @INC */
5107 av_push(GvAVn(PL_incgv), libdir);
5110 assert (SvREFCNT(subdir) == 1);
5111 SvREFCNT_dec(subdir);
5117 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5121 const line_t oldline = CopLINE(PL_curcop);
5127 while (av_len(paramList) >= 0) {
5128 cv = (CV*)av_shift(paramList);
5130 if (paramList == PL_beginav) {
5131 /* save PL_beginav for compiler */
5132 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5134 else if (paramList == PL_checkav) {
5135 /* save PL_checkav for compiler */
5136 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5138 else if (paramList == PL_unitcheckav) {
5139 /* save PL_unitcheckav for compiler */
5140 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5151 PL_madskills |= 16384;
5156 PL_madskills &= ~16384;
5159 (void)SvPV_const(atsv, len);
5160 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5161 break; /* not really trying to run, so just wing it */
5163 PL_curcop = &PL_compiling;
5164 CopLINE_set(PL_curcop, oldline);
5165 if (paramList == PL_beginav)
5166 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5168 Perl_sv_catpvf(aTHX_ atsv,
5169 "%s failed--call queue aborted",
5170 paramList == PL_checkav ? "CHECK"
5171 : paramList == PL_initav ? "INIT"
5172 : paramList == PL_unitcheckav ? "UNITCHECK"
5174 while (PL_scopestack_ix > oldscope)
5177 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5184 /* my_exit() was called */
5185 while (PL_scopestack_ix > oldscope)
5188 PL_curstash = PL_defstash;
5189 PL_curcop = &PL_compiling;
5190 CopLINE_set(PL_curcop, oldline);
5192 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5193 return; /* not really trying to run, so just wing it */
5194 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5195 if (paramList == PL_beginav)
5196 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5198 Perl_croak(aTHX_ "%s failed--call queue aborted",
5199 paramList == PL_checkav ? "CHECK"
5200 : paramList == PL_initav ? "INIT"
5201 : paramList == PL_unitcheckav ? "UNITCHECK"
5208 PL_curcop = &PL_compiling;
5209 CopLINE_set(PL_curcop, oldline);
5212 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5221 Perl_my_exit(pTHX_ U32 status)
5224 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5225 (void*)thr, (unsigned long) status));
5234 STATUS_EXIT_SET(status);
5241 Perl_my_failure_exit(pTHX)
5245 /* We have been called to fall on our sword. The desired exit code
5246 * should be already set in STATUS_UNIX, but could be shifted over
5247 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5250 * If an error code has not been set, then force the issue.
5252 if (MY_POSIX_EXIT) {
5254 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5255 * the exit code when there isn't an error.
5258 if (STATUS_UNIX == 0)
5259 STATUS_UNIX_EXIT_SET(255);
5261 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5263 /* The exit code could have been set by $? or vmsish which
5264 * means that it may not be fatal. So convert
5265 * success/warning codes to fatal.
5267 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5268 STATUS_UNIX_EXIT_SET(255);
5272 /* Traditionally Perl on VMS always expects a Fatal Error. */
5273 if (vaxc$errno & 1) {
5275 /* So force success status to failure */
5276 if (STATUS_NATIVE & 1)
5281 STATUS_UNIX = EINTR; /* In case something cares */
5286 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5288 /* Encode the severity code */
5289 severity = STATUS_NATIVE & STS$M_SEVERITY;
5290 STATUS_UNIX = (severity ? severity : 1) << 8;
5292 /* Perl expects this to be a fatal error */
5293 if (severity != STS$K_SEVERE)
5302 STATUS_UNIX_SET(errno);
5304 exitstatus = STATUS_UNIX >> 8;
5305 if (exitstatus & 255)
5306 STATUS_UNIX_SET(exitstatus);
5308 STATUS_UNIX_SET(255);
5315 S_my_exit_jump(pTHX)
5320 SvREFCNT_dec(PL_e_script);
5324 POPSTACK_TO(PL_mainstack);
5332 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5335 const char * const p = SvPVX_const(PL_e_script);
5336 const char *nl = strchr(p, '\n');
5338 PERL_UNUSED_ARG(idx);
5339 PERL_UNUSED_ARG(maxlen);
5341 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5343 filter_del(read_e_script);
5346 sv_catpvn(buf_sv, p, nl-p);
5347 sv_chop(PL_e_script, nl);
5353 * c-indentation-style: bsd
5355 * indent-tabs-mode: t
5358 * ex: set ts=8 sts=4 sw=4 noet: