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)))
1560 #ifndef PERL_USE_SAFE_PUTENV
1561 /* Can we grab env area too to be used as the area for $0? */
1562 if (s && PL_origenviron && !PL_use_safe_putenv) {
1563 if ((PL_origenviron[0] == s + 1)
1566 (PL_origenviron[0] > s &&
1567 PL_origenviron[0] <=
1568 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1571 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1572 s = PL_origenviron[0];
1575 my_setenv("NoNe SuCh", NULL);
1576 /* Force copy of environment. */
1577 for (i = 1; PL_origenviron[i]; i++) {
1578 if (PL_origenviron[i] == s + 1
1581 (PL_origenviron[i] > s &&
1582 PL_origenviron[i] <=
1583 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1586 s = PL_origenviron[i];
1594 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1596 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1601 /* Come here if running an undumped a.out. */
1603 PL_origfilename = savepv(argv[0]);
1604 PL_do_undump = FALSE;
1605 cxstack_ix = -1; /* start label stack again */
1607 assert (!PL_tainted);
1609 S_set_caret_X(aTHX);
1611 init_postdump_symbols(argc,argv,env);
1616 op_free(PL_main_root);
1617 PL_main_root = NULL;
1619 PL_main_start = NULL;
1620 SvREFCNT_dec(PL_main_cv);
1624 oldscope = PL_scopestack_ix;
1625 PL_dowarn = G_WARN_OFF;
1630 parse_body(env,xsinit);
1632 call_list(oldscope, PL_unitcheckav);
1634 call_list(oldscope, PL_checkav);
1641 /* my_exit() was called */
1642 while (PL_scopestack_ix > oldscope)
1645 PL_curstash = PL_defstash;
1647 call_list(oldscope, PL_unitcheckav);
1649 call_list(oldscope, PL_checkav);
1653 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1662 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1665 int argc = PL_origargc;
1666 char **argv = PL_origargv;
1667 const char *scriptname = NULL;
1668 VOL bool dosearch = FALSE;
1669 const char *validarg = "";
1671 register char *s, c;
1672 const char *cddir = NULL;
1673 #ifdef USE_SITECUSTOMIZE
1674 bool minus_f = FALSE;
1677 sv_setpvn(PL_linestr,"",0);
1678 sv = newSVpvs(""); /* first used for -I flags */
1682 for (argc--,argv++; argc > 0; argc--,argv++) {
1683 if (argv[0][0] != '-' || !argv[0][1])
1687 validarg = " PHOOEY ";
1691 * Can we rely on the kernel to start scripts with argv[1] set to
1692 * contain all #! line switches (the whole line)? (argv[0] is set to
1693 * the interpreter name, argv[2] to the script name; argv[3] and
1694 * above may contain other arguments.)
1701 #ifndef PERL_STRICT_CR
1726 if ((s = moreswitches(s)))
1731 CHECK_MALLOC_TOO_LATE_FOR('t');
1732 if( !PL_tainting ) {
1733 PL_taint_warn = TRUE;
1739 CHECK_MALLOC_TOO_LATE_FOR('T');
1741 PL_taint_warn = FALSE;
1749 #ifdef MACOS_TRADITIONAL
1750 /* ignore -e for Dev:Pseudo argument */
1751 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1754 forbid_setid('e', -1);
1756 PL_e_script = newSVpvs("");
1757 filter_add(read_e_script, NULL);
1760 sv_catpv(PL_e_script, s);
1762 sv_catpv(PL_e_script, argv[1]);
1766 Perl_croak(aTHX_ "No code specified for -%c", c);
1767 sv_catpvs(PL_e_script, "\n");
1771 #ifdef USE_SITECUSTOMIZE
1777 case 'I': /* -I handled both here and in moreswitches() */
1778 forbid_setid('I', -1);
1779 if (!*++s && (s=argv[1]) != NULL) {
1783 STRLEN len = strlen(s);
1784 const char * const p = savepvn(s, len);
1785 incpush(p, TRUE, TRUE, FALSE, FALSE);
1786 sv_catpvs(sv, "-I");
1787 sv_catpvn(sv, p, len);
1792 Perl_croak(aTHX_ "No directory specified for -I");
1795 forbid_setid('P', -1);
1796 PL_preprocess = TRUE;
1800 forbid_setid('S', -1);
1808 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1812 opts_prog = newSVpvs("print Config::myconfig(),");
1814 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\",");
1816 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\",");
1818 opts = SvCUR(opts_prog);
1820 Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:"
1824 # ifdef DEBUG_LEAKING_SCALARS
1825 " DEBUG_LEAKING_SCALARS"
1827 # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1828 " DEBUG_LEAKING_SCALARS_FORK_DUMP"
1830 # ifdef FAKE_THREADS
1833 # ifdef MULTIPLICITY
1842 # ifdef PERL_DONT_CREATE_GVSV
1843 " PERL_DONT_CREATE_GVSV"
1845 # ifdef PERL_GLOBAL_STRUCT
1846 " PERL_GLOBAL_STRUCT"
1848 # ifdef PERL_IMPLICIT_CONTEXT
1849 " PERL_IMPLICIT_CONTEXT"
1851 # ifdef PERL_IMPLICIT_SYS
1852 " PERL_IMPLICIT_SYS"
1857 # ifdef PERL_MALLOC_WRAP
1860 # ifdef PERL_NEED_APPCTX
1863 # ifdef PERL_NEED_TIMESBASE
1864 " PERL_NEED_TIMESBASE"
1866 # ifdef PERL_OLD_COPY_ON_WRITE
1867 " PERL_OLD_COPY_ON_WRITE"
1869 # ifdef PERL_TRACK_MEMPOOL
1870 " PERL_TRACK_MEMPOOL"
1872 # ifdef PERL_USE_SAFE_PUTENV
1873 " PERL_USE_SAFE_PUTENV"
1875 #ifdef PERL_USES_PL_PIDSTATUS
1876 " PERL_USES_PL_PIDSTATUS"
1878 # ifdef PL_OP_SLAB_ALLOC
1881 # ifdef THREADS_HAVE_PIDS
1882 " THREADS_HAVE_PIDS"
1884 # ifdef USE_64_BIT_ALL
1887 # ifdef USE_64_BIT_INT
1890 # ifdef USE_ITHREADS
1893 # ifdef USE_LARGE_FILES
1896 # ifdef USE_LONG_DOUBLE
1902 # ifdef USE_REENTRANT_API
1903 " USE_REENTRANT_API"
1908 # ifdef USE_SITECUSTOMIZE
1909 " USE_SITECUSTOMIZE"
1916 while (SvCUR(opts_prog) > opts+76) {
1917 /* find last space after "options: " and before col 76
1921 char * const pv = SvPV_nolen(opts_prog);
1922 const char c = pv[opts+76];
1924 space = strrchr(pv+opts+26, ' ');
1926 if (!space) break; /* "Can't happen" */
1928 /* break the line before that space */
1931 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1932 STR_WITH_LEN("\\n "));
1935 sv_catpvs(opts_prog,"\\n\",");
1937 #if defined(LOCAL_PATCH_COUNT)
1938 if (LOCAL_PATCH_COUNT > 0) {
1940 sv_catpvs(opts_prog,
1941 "\" Locally applied patches:\\n\",");
1942 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1943 if (PL_localpatches[i])
1944 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1945 0, PL_localpatches[i], 0);
1949 Perl_sv_catpvf(aTHX_ opts_prog,
1950 "\" Built under %s\\n\"",OSNAME);
1953 Perl_sv_catpvf(aTHX_ opts_prog,
1954 ",\" Compiled at %s %s\\n\"",__DATE__,
1957 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1961 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1962 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1963 "sort grep {/^PERL/} keys %ENV; ");
1965 sv_catpvs(opts_prog,
1966 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1968 sv_catpvs(opts_prog,
1969 "print \" \\%ENV:\\n @env\\n\" if @env;"
1970 "print \" \\@INC:\\n @INC\\n\";");
1974 opts_prog = Perl_newSVpvf(aTHX_
1975 "Config::config_vars(qw%c%s%c)",
1979 av_push(PL_preambleav, opts_prog);
1980 /* don't look for script or read stdin */
1981 scriptname = BIT_BUCKET;
1985 PL_doextract = TRUE;
1993 if (!*++s || isSPACE(*s)) {
1997 /* catch use of gnu style long options */
1998 if (strEQ(s, "version")) {
2002 if (strEQ(s, "help")) {
2009 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2015 #ifndef SECURE_INTERNAL_GETENV
2018 (s = PerlEnv_getenv("PERL5OPT")))
2020 const char *popt = s;
2023 if (*s == '-' && *(s+1) == 'T') {
2024 CHECK_MALLOC_TOO_LATE_FOR('T');
2026 PL_taint_warn = FALSE;
2029 char *popt_copy = NULL;
2042 if (!strchr("CDIMUdmtwA", *s))
2043 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2047 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2048 s = popt_copy + (s - popt);
2049 d = popt_copy + (d - popt);
2056 if( !PL_tainting ) {
2057 PL_taint_warn = TRUE;
2067 #ifdef USE_SITECUSTOMIZE
2069 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2070 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2075 scriptname = argv[0];
2078 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2080 else if (scriptname == NULL) {
2082 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2088 /* Set $^X early so that it can be used for relocatable paths in @INC */
2089 assert (!PL_tainted);
2091 S_set_caret_X(aTHX);
2098 = open_script(scriptname, dosearch, sv, &suidscript);
2100 validate_suid(validarg, scriptname, fdscript, suidscript);
2103 # if defined(SIGCHLD) || defined(SIGCLD)
2106 # define SIGCHLD SIGCLD
2108 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2109 if (sigstate == (Sighandler_t) SIG_IGN) {
2110 if (ckWARN(WARN_SIGNAL))
2111 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2112 "Can't ignore signal CHLD, forcing to default");
2113 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2120 #ifdef MACOS_TRADITIONAL
2121 || gMacPerl_AlwaysExtract
2125 /* This will croak if suidscript is >= 0, as -x cannot be used with
2127 forbid_setid('x', suidscript);
2128 /* Hence you can't get here if suidscript >= 0 */
2131 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2132 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2136 PL_main_cv = PL_compcv = (CV*)newSV(0);
2137 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2138 CvUNIQUE_on(PL_compcv);
2140 CvPADLIST(PL_compcv) = pad_new(0);
2143 boot_core_UNIVERSAL();
2144 boot_core_xsutils();
2147 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2149 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2155 # ifdef HAS_SOCKS5_INIT
2156 socks5_init(argv[0]);
2162 init_predump_symbols();
2163 /* init_postdump_symbols not currently designed to be called */
2164 /* more than once (ENV isn't cleared first, for example) */
2165 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2167 init_postdump_symbols(argc,argv,env);
2169 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2170 * or explicitly in some platforms.
2171 * locale.c:Perl_init_i18nl10n() if the environment
2172 * look like the user wants to use UTF-8. */
2173 #if defined(__SYMBIAN32__)
2174 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2177 /* Requires init_predump_symbols(). */
2178 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2183 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2184 * and the default open disciplines. */
2185 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2186 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2188 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2189 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2190 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2192 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2193 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2194 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2196 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2197 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2198 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2200 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2201 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2204 sv_setpvn(sv, ":utf8\0:utf8", 11);
2206 sv_setpvn(sv, ":utf8\0", 6);
2209 sv_setpvn(sv, "\0:utf8", 6);
2215 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2216 if (strEQ(s, "unsafe"))
2217 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2218 else if (strEQ(s, "safe"))
2219 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2221 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2225 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2229 PL_xmlfp = PerlIO_stdout();
2231 PL_xmlfp = PerlIO_open(s, "w");
2233 Perl_croak(aTHX_ "Can't open %s", s);
2235 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2237 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2238 PL_madskills = atoi(s);
2239 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2245 /* now parse the script */
2247 SETERRNO(0,SS_NORMAL);
2249 #ifdef MACOS_TRADITIONAL
2250 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2252 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2254 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2255 MacPerl_MPWFileName(PL_origfilename));
2259 if (yyparse() || PL_error_count) {
2261 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2263 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2268 CopLINE_set(PL_curcop, 0);
2269 PL_curstash = PL_defstash;
2270 PL_preprocess = FALSE;
2272 SvREFCNT_dec(PL_e_script);
2280 SAVECOPFILE(PL_curcop);
2281 SAVECOPLINE(PL_curcop);
2282 gv_check(PL_defstash);
2289 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2290 dump_mstats("after compilation:");
2299 =for apidoc perl_run
2301 Tells a Perl interpreter to run. See L<perlembed>.
2314 PERL_UNUSED_ARG(my_perl);
2316 oldscope = PL_scopestack_ix;
2324 cxstack_ix = -1; /* start context stack again */
2326 case 0: /* normal completion */
2330 case 2: /* my_exit() */
2331 while (PL_scopestack_ix > oldscope)
2334 PL_curstash = PL_defstash;
2335 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2336 PL_endav && !PL_minus_c)
2337 call_list(oldscope, PL_endav);
2339 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2340 dump_mstats("after execution: ");
2346 POPSTACK_TO(PL_mainstack);
2349 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2361 S_run_body(pTHX_ I32 oldscope)
2364 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2365 PL_sawampersand ? "Enabling" : "Omitting"));
2367 if (!PL_restartop) {
2371 exit(0); /* less likely to core dump than my_exit(0) */
2374 DEBUG_x(dump_all());
2377 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2379 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2383 #ifdef MACOS_TRADITIONAL
2384 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2385 (gMacPerl_ErrorFormat ? "# " : ""),
2386 MacPerl_MPWFileName(PL_origfilename));
2388 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2392 if (PERLDB_SINGLE && PL_DBsingle)
2393 sv_setiv(PL_DBsingle, 1);
2395 call_list(oldscope, PL_initav);
2401 PL_op = PL_restartop;
2405 else if (PL_main_start) {
2406 CvDEPTH(PL_main_cv) = 1;
2407 PL_op = PL_main_start;
2415 =head1 SV Manipulation Functions
2417 =for apidoc p||get_sv
2419 Returns the SV of the specified Perl scalar. If C<create> is set and the
2420 Perl variable does not exist then it will be created. If C<create> is not
2421 set and the variable does not exist then NULL is returned.
2427 Perl_get_sv(pTHX_ const char *name, I32 create)
2430 gv = gv_fetchpv(name, create, SVt_PV);
2437 =head1 Array Manipulation Functions
2439 =for apidoc p||get_av
2441 Returns the AV of the specified Perl array. If C<create> is set and the
2442 Perl variable does not exist then it will be created. If C<create> is not
2443 set and the variable does not exist then NULL is returned.
2449 Perl_get_av(pTHX_ const char *name, I32 create)
2451 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2460 =head1 Hash Manipulation Functions
2462 =for apidoc p||get_hv
2464 Returns the HV of the specified Perl hash. If C<create> is set and the
2465 Perl variable does not exist then it will be created. If C<create> is not
2466 set and the variable does not exist then NULL is returned.
2472 Perl_get_hv(pTHX_ const char *name, I32 create)
2474 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2483 =head1 CV Manipulation Functions
2485 =for apidoc p||get_cvn_flags
2487 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2488 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2489 exist then it will be declared (which has the same effect as saying
2490 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2491 then NULL is returned.
2493 =for apidoc p||get_cv
2495 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2501 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2503 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2504 /* XXX this is probably not what they think they're getting.
2505 * It has the same effect as "sub name;", i.e. just a forward
2507 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2508 SV *const sv = newSVpvn(name,len);
2509 SvFLAGS(sv) |= flags & SVf_UTF8;
2510 return newSUB(start_subparse(FALSE, 0),
2511 newSVOP(OP_CONST, 0, sv),
2520 Perl_get_cv(pTHX_ const char *name, I32 flags)
2522 return get_cvn_flags(name, strlen(name), flags);
2525 /* Be sure to refetch the stack pointer after calling these routines. */
2529 =head1 Callback Functions
2531 =for apidoc p||call_argv
2533 Performs a callback to the specified Perl sub. See L<perlcall>.
2539 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2541 /* See G_* flags in cop.h */
2542 /* null terminated arg list */
2550 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2555 return call_pv(sub_name, flags);
2559 =for apidoc p||call_pv
2561 Performs a callback to the specified Perl sub. See L<perlcall>.
2567 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2568 /* name of the subroutine */
2569 /* See G_* flags in cop.h */
2571 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2575 =for apidoc p||call_method
2577 Performs a callback to the specified Perl method. The blessed object must
2578 be on the stack. See L<perlcall>.
2584 Perl_call_method(pTHX_ const char *methname, I32 flags)
2585 /* name of the subroutine */
2586 /* See G_* flags in cop.h */
2588 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2591 /* May be called with any of a CV, a GV, or an SV containing the name. */
2593 =for apidoc p||call_sv
2595 Performs a callback to the Perl sub whose name is in the SV. See
2602 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2603 /* See G_* flags in cop.h */
2606 LOGOP myop; /* fake syntax tree node */
2611 bool oldcatch = CATCH_GET;
2613 OP* const oldop = PL_op;
2616 if (flags & G_DISCARD) {
2621 Zero(&myop, 1, LOGOP);
2622 myop.op_next = NULL;
2623 if (!(flags & G_NOARGS))
2624 myop.op_flags |= OPf_STACKED;
2625 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2626 (flags & G_ARRAY) ? OPf_WANT_LIST :
2631 EXTEND(PL_stack_sp, 1);
2632 *++PL_stack_sp = sv;
2634 oldscope = PL_scopestack_ix;
2636 if (PERLDB_SUB && PL_curstash != PL_debstash
2637 /* Handle first BEGIN of -d. */
2638 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2639 /* Try harder, since this may have been a sighandler, thus
2640 * curstash may be meaningless. */
2641 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2642 && !(flags & G_NODEBUG))
2643 PL_op->op_private |= OPpENTERSUB_DB;
2645 if (flags & G_METHOD) {
2646 Zero(&method_op, 1, UNOP);
2647 method_op.op_next = PL_op;
2648 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2649 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2650 PL_op = (OP*)&method_op;
2653 if (!(flags & G_EVAL)) {
2655 CALL_BODY_SUB((OP*)&myop);
2656 retval = PL_stack_sp - (PL_stack_base + oldmark);
2657 CATCH_SET(oldcatch);
2660 myop.op_other = (OP*)&myop;
2662 create_eval_scope(flags|G_FAKINGEVAL);
2670 CALL_BODY_SUB((OP*)&myop);
2671 retval = PL_stack_sp - (PL_stack_base + oldmark);
2672 if (!(flags & G_KEEPERR))
2673 sv_setpvn(ERRSV,"",0);
2679 /* my_exit() was called */
2680 PL_curstash = PL_defstash;
2683 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2684 Perl_croak(aTHX_ "Callback called exit");
2689 PL_op = PL_restartop;
2693 PL_stack_sp = PL_stack_base + oldmark;
2694 if (flags & G_ARRAY)
2698 *++PL_stack_sp = &PL_sv_undef;
2703 if (PL_scopestack_ix > oldscope)
2704 delete_eval_scope();
2708 if (flags & G_DISCARD) {
2709 PL_stack_sp = PL_stack_base + oldmark;
2718 /* Eval a string. The G_EVAL flag is always assumed. */
2721 =for apidoc p||eval_sv
2723 Tells Perl to C<eval> the string in the SV.
2729 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2731 /* See G_* flags in cop.h */
2735 UNOP myop; /* fake syntax tree node */
2736 VOL I32 oldmark = SP - PL_stack_base;
2739 OP* const oldop = PL_op;
2742 if (flags & G_DISCARD) {
2749 Zero(PL_op, 1, UNOP);
2750 EXTEND(PL_stack_sp, 1);
2751 *++PL_stack_sp = sv;
2753 if (!(flags & G_NOARGS))
2754 myop.op_flags = OPf_STACKED;
2755 myop.op_next = NULL;
2756 myop.op_type = OP_ENTEREVAL;
2757 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2758 (flags & G_ARRAY) ? OPf_WANT_LIST :
2760 if (flags & G_KEEPERR)
2761 myop.op_flags |= OPf_SPECIAL;
2763 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2764 * before a PUSHEVAL, which corrupts the stack after a croak */
2765 TAINT_PROPER("eval_sv()");
2771 CALL_BODY_EVAL((OP*)&myop);
2772 retval = PL_stack_sp - (PL_stack_base + oldmark);
2773 if (!(flags & G_KEEPERR))
2774 sv_setpvn(ERRSV,"",0);
2780 /* my_exit() was called */
2781 PL_curstash = PL_defstash;
2784 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2785 Perl_croak(aTHX_ "Callback called exit");
2790 PL_op = PL_restartop;
2794 PL_stack_sp = PL_stack_base + oldmark;
2795 if (flags & G_ARRAY)
2799 *++PL_stack_sp = &PL_sv_undef;
2805 if (flags & G_DISCARD) {
2806 PL_stack_sp = PL_stack_base + oldmark;
2816 =for apidoc p||eval_pv
2818 Tells Perl to C<eval> the given string and return an SV* result.
2824 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2828 SV* sv = newSVpv(p, 0);
2830 eval_sv(sv, G_SCALAR);
2837 if (croak_on_error && SvTRUE(ERRSV)) {
2838 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2844 /* Require a module. */
2847 =head1 Embedding Functions
2849 =for apidoc p||require_pv
2851 Tells Perl to C<require> the file named by the string argument. It is
2852 analogous to the Perl code C<eval "require '$file'">. It's even
2853 implemented that way; consider using load_module instead.
2858 Perl_require_pv(pTHX_ const char *pv)
2863 PUSHSTACKi(PERLSI_REQUIRE);
2865 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2866 eval_sv(sv_2mortal(sv), G_DISCARD);
2872 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2874 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2877 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2881 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2883 /* This message really ought to be max 23 lines.
2884 * Removed -h because the user already knows that option. Others? */
2886 static const char * const usage_msg[] = {
2887 "-0[octal] specify record separator (\\0, if no argument)",
2888 "-A[mod][=pattern] activate all/given assertions",
2889 "-a autosplit mode with -n or -p (splits $_ into @F)",
2890 "-C[number/list] enables the listed Unicode features",
2891 "-c check syntax only (runs BEGIN and CHECK blocks)",
2892 "-d[:debugger] run program under debugger",
2893 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2894 "-e program one line of program (several -e's allowed, omit programfile)",
2895 "-E program like -e, but enables all optional features",
2896 "-f don't do $sitelib/sitecustomize.pl at startup",
2897 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2898 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2899 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2900 "-l[octal] enable line ending processing, specifies line terminator",
2901 "-[mM][-]module execute \"use/no module...\" before executing program",
2902 "-n assume \"while (<>) { ... }\" loop around program",
2903 "-p assume loop like -n but print line also, like sed",
2904 "-P run program through C preprocessor before compilation",
2905 "-s enable rudimentary parsing for switches after programfile",
2906 "-S look for programfile using PATH environment variable",
2907 "-t enable tainting warnings",
2908 "-T enable tainting checks",
2909 "-u dump core after parsing program",
2910 "-U allow unsafe operations",
2911 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2912 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2913 "-w enable many useful warnings (RECOMMENDED)",
2914 "-W enable all warnings",
2915 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2916 "-X disable all warnings",
2920 const char * const *p = usage_msg;
2922 PerlIO_printf(PerlIO_stdout(),
2923 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2926 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2929 /* convert a string of -D options (or digits) into an int.
2930 * sets *s to point to the char after the options */
2934 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2936 static const char * const usage_msgd[] = {
2937 " Debugging flag values: (see also -d)",
2938 " p Tokenizing and parsing (with v, displays parse stack)",
2939 " s Stack snapshots (with v, displays all stacks)",
2940 " l Context (loop) stack processing",
2941 " t Trace execution",
2942 " o Method and overloading resolution",
2943 " c String/numeric conversions",
2944 " P Print profiling info, preprocessor command for -P, source file input state",
2945 " m Memory allocation",
2946 " f Format processing",
2947 " r Regular expression parsing and execution",
2948 " x Syntax tree dump",
2949 " u Tainting checks",
2950 " H Hash dump -- usurps values()",
2951 " X Scratchpad allocation",
2953 " S Thread synchronization",
2955 " R Include reference counts of dumped variables (eg when using -Ds)",
2956 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2957 " v Verbose: use in conjunction with other flags",
2959 " A Consistency checks on internal structures",
2960 " q quiet - currently only suppresses the 'EXECUTING' message",
2965 /* if adding extra options, remember to update DEBUG_MASK */
2966 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2968 for (; isALNUM(**s); (*s)++) {
2969 const char * const d = strchr(debopts,**s);
2971 i |= 1 << (d - debopts);
2972 else if (ckWARN_d(WARN_DEBUGGING))
2973 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2974 "invalid option -D%c, use -D'' to see choices\n", **s);
2977 else if (isDIGIT(**s)) {
2979 for (; isALNUM(**s); (*s)++) ;
2981 else if (givehelp) {
2982 const char *const *p = usage_msgd;
2983 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2986 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2987 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2988 "-Dp not implemented on this platform\n");
2994 /* This routine handles any switches that can be given during run */
2997 Perl_moreswitches(pTHX_ char *s)
3008 SvREFCNT_dec(PL_rs);
3009 if (s[1] == 'x' && s[2]) {
3010 const char *e = s+=2;
3016 flags = PERL_SCAN_SILENT_ILLDIGIT;
3017 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3018 if (s + numlen < e) {
3019 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3023 PL_rs = newSVpvs("");
3024 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3025 tmps = (U8*)SvPVX(PL_rs);
3026 uvchr_to_utf8(tmps, rschar);
3027 SvCUR_set(PL_rs, UNISKIP(rschar));
3032 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3033 if (rschar & ~((U8)~0))
3034 PL_rs = &PL_sv_undef;
3035 else if (!rschar && numlen >= 2)
3036 PL_rs = newSVpvs("");
3038 char ch = (char)rschar;
3039 PL_rs = newSVpvn(&ch, 1);
3042 sv_setsv(get_sv("/", TRUE), PL_rs);
3047 PL_unicode = parse_unicode_opts( (const char **)&s );
3048 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3054 while (*s && !isSPACE(*s)) ++s;
3055 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3066 forbid_setid('d', -1);
3069 /* -dt indicates to the debugger that threads will be used */
3070 if (*s == 't' && !isALNUM(s[1])) {
3072 my_setenv("PERL5DB_THREADED", "1");
3075 /* The following permits -d:Mod to accepts arguments following an =
3076 in the fashion that -MSome::Mod does. */
3077 if (*s == ':' || *s == '=') {
3079 SV * const sv = newSVpvs("use Devel::");
3081 /* We now allow -d:Module=Foo,Bar */
3082 while(isALNUM(*s) || *s==':') ++s;
3084 sv_catpv(sv, start);
3086 sv_catpvn(sv, start, s-start);
3087 /* Don't use NUL as q// delimiter here, this string goes in the
3089 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3092 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3095 PL_perldb = PERLDB_ALL;
3102 forbid_setid('D', -1);
3104 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3105 #else /* !DEBUGGING */
3106 if (ckWARN_d(WARN_DEBUGGING))
3107 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3108 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3109 for (s++; isALNUM(*s); s++) ;
3114 usage(PL_origargv[0]);
3117 Safefree(PL_inplace);
3118 #if defined(__CYGWIN__) /* do backup extension automagically */
3119 if (*(s+1) == '\0') {
3120 PL_inplace = savepvs(".bak");
3123 #endif /* __CYGWIN__ */
3125 const char * const start = ++s;
3126 while (*s && !isSPACE(*s))
3129 PL_inplace = savepvn(start, s - start);
3133 if (*s == '-') /* Additional switches on #! line. */
3137 case 'I': /* -I handled both here and in parse_body() */
3138 forbid_setid('I', -1);
3140 while (*s && isSPACE(*s))
3145 /* ignore trailing spaces (possibly followed by other switches) */
3147 for (e = p; *e && !isSPACE(*e); e++) ;
3151 } while (*p && *p != '-');
3152 e = savepvn(s, e-s);
3153 incpush(e, TRUE, TRUE, FALSE, FALSE);
3160 Perl_croak(aTHX_ "No directory specified for -I");
3166 SvREFCNT_dec(PL_ors_sv);
3172 PL_ors_sv = newSVpvs("\n");
3173 numlen = 3 + (*s == '0');
3174 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3178 if (RsPARA(PL_rs)) {
3179 PL_ors_sv = newSVpvs("\n\n");
3182 PL_ors_sv = newSVsv(PL_rs);
3187 forbid_setid('A', -1);
3190 char * const start = s;
3191 SV * const sv = newSVpvs("use assertions::activate");
3192 while(isALNUM(*s) || *s == ':') ++s;
3194 sv_catpvs(sv, "::");
3195 sv_catpvn(sv, start, s-start);
3198 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3201 else if (*s != '\0') {
3202 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3204 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3208 forbid_setid('M', -1); /* XXX ? */
3211 forbid_setid('m', -1); /* XXX ? */
3215 const char *use = "use ";
3216 /* -M-foo == 'no foo' */
3217 /* Leading space on " no " is deliberate, to make both
3218 possibilities the same length. */
3219 if (*s == '-') { use = " no "; ++s; }
3220 sv = newSVpvn(use,4);
3222 /* We allow -M'Module qw(Foo Bar)' */
3223 while(isALNUM(*s) || *s==':') ++s;
3225 sv_catpv(sv, start);
3226 if (*(start-1) == 'm') {
3228 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3229 sv_catpvs( sv, " ()");
3233 Perl_croak(aTHX_ "Module name required with -%c option",
3235 sv_catpvn(sv, start, s-start);
3236 sv_catpvs(sv, " split(/,/,q");
3237 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3239 sv_catpvs(sv, "\0)");
3242 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3245 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3256 forbid_setid('s', -1);
3257 PL_doswitches = TRUE;
3271 #ifdef MACOS_TRADITIONAL
3272 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3274 PL_do_undump = TRUE;
3282 if (!sv_derived_from(PL_patchlevel, "version"))
3283 upg_version(PL_patchlevel);
3285 PerlIO_printf(PerlIO_stdout(),
3286 Perl_form(aTHX_ "\nThis is perl, %"SVf
3287 #ifdef PERL_PATCHNUM
3288 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3291 SVfARG(vstringify(PL_patchlevel)),
3294 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3295 PerlIO_printf(PerlIO_stdout(),
3296 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3297 SVfARG(vstringify(PL_patchlevel))));
3298 PerlIO_printf(PerlIO_stdout(),
3299 Perl_form(aTHX_ " built under %s at %s %s\n",
3300 OSNAME, __DATE__, __TIME__));
3301 PerlIO_printf(PerlIO_stdout(),
3302 Perl_form(aTHX_ " OS Specific Release: %s\n",
3306 #if defined(LOCAL_PATCH_COUNT)
3307 if (LOCAL_PATCH_COUNT > 0)
3308 PerlIO_printf(PerlIO_stdout(),
3309 "\n(with %d registered patch%s, "
3310 "see perl -V for more detail)",
3312 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3315 PerlIO_printf(PerlIO_stdout(),
3316 "\n\nCopyright 1987-2007, Larry Wall\n");
3317 #ifdef MACOS_TRADITIONAL
3318 PerlIO_printf(PerlIO_stdout(),
3319 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3320 "maintained by Chris Nandor\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3329 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3332 PerlIO_printf(PerlIO_stdout(),
3333 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3334 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3337 PerlIO_printf(PerlIO_stdout(),
3338 "atariST series port, ++jrb bammi@cadence.com\n");
3341 PerlIO_printf(PerlIO_stdout(),
3342 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3345 PerlIO_printf(PerlIO_stdout(),
3346 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3353 PerlIO_printf(PerlIO_stdout(),
3354 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3357 PerlIO_printf(PerlIO_stdout(),
3358 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3361 PerlIO_printf(PerlIO_stdout(),
3362 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3365 PerlIO_printf(PerlIO_stdout(),
3366 "MiNT port by Guido Flohr, 1997-1999\n");
3369 PerlIO_printf(PerlIO_stdout(),
3370 "EPOC port by Olaf Flebbe, 1999-2002\n");
3373 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3374 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3377 #ifdef __SYMBIAN32__
3378 PerlIO_printf(PerlIO_stdout(),
3379 "Symbian port by Nokia, 2004-2005\n");
3381 #ifdef BINARY_BUILD_NOTICE
3382 BINARY_BUILD_NOTICE;
3384 PerlIO_printf(PerlIO_stdout(),
3386 Perl may be copied only under the terms of either the Artistic License or the\n\
3387 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3388 Complete documentation for Perl, including FAQ lists, should be found on\n\
3389 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3390 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3393 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3394 PL_dowarn |= G_WARN_ON;
3399 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3400 if (!specialWARN(PL_compiling.cop_warnings))
3401 PerlMemShared_free(PL_compiling.cop_warnings);
3402 PL_compiling.cop_warnings = pWARN_ALL ;
3406 PL_dowarn = G_WARN_ALL_OFF;
3407 if (!specialWARN(PL_compiling.cop_warnings))
3408 PerlMemShared_free(PL_compiling.cop_warnings);
3409 PL_compiling.cop_warnings = pWARN_NONE ;
3414 if (s[1] == '-') /* Additional switches on #! line. */
3419 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3425 #ifdef ALTERNATE_SHEBANG
3426 case 'S': /* OS/2 needs -S on "extproc" line. */
3434 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3439 /* compliments of Tom Christiansen */
3441 /* unexec() can be found in the Gnu emacs distribution */
3442 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3445 Perl_my_unexec(pTHX)
3447 PERL_UNUSED_CONTEXT;
3449 SV * prog = newSVpv(BIN_EXP, 0);
3450 SV * file = newSVpv(PL_origfilename, 0);
3454 sv_catpvs(prog, "/perl");
3455 sv_catpvs(file, ".perldump");
3457 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3458 /* unexec prints msg to stderr in case of failure */
3459 PerlProc_exit(status);
3462 # include <lib$routines.h>
3463 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3464 # elif defined(WIN32) || defined(__CYGWIN__)
3465 Perl_croak(aTHX_ "dump is not supported");
3467 ABORT(); /* for use with undump */
3472 /* initialize curinterp */
3478 # define PERLVAR(var,type)
3479 # define PERLVARA(var,n,type)
3480 # if defined(PERL_IMPLICIT_CONTEXT)
3481 # define PERLVARI(var,type,init) aTHX->var = init;
3482 # define PERLVARIC(var,type,init) aTHX->var = init;
3484 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3485 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3487 # include "intrpvar.h"
3488 # include "thrdvar.h"
3494 # define PERLVAR(var,type)
3495 # define PERLVARA(var,n,type)
3496 # define PERLVARI(var,type,init) PL_##var = init;
3497 # define PERLVARIC(var,type,init) PL_##var = init;
3498 # include "intrpvar.h"
3499 # include "thrdvar.h"
3506 /* As these are inside a structure, PERLVARI isn't capable of initialising
3508 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3509 PL_reg_poscache = PL_reg_starttry = NULL;
3513 S_init_main_stash(pTHX)
3518 PL_curstash = PL_defstash = newHV();
3519 /* We know that the string "main" will be in the global shared string
3520 table, so it's a small saving to use it rather than allocate another
3522 PL_curstname = newSVpvs_share("main");
3523 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3524 /* If we hadn't caused another reference to "main" to be in the shared
3525 string table above, then it would be worth reordering these two,
3526 because otherwise all we do is delete "main" from it as a consequence
3527 of the SvREFCNT_dec, only to add it again with hv_name_set */
3528 SvREFCNT_dec(GvHV(gv));
3529 hv_name_set(PL_defstash, "main", 4, 0);
3530 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3532 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3534 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3535 GvMULTI_on(PL_incgv);
3536 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3537 GvMULTI_on(PL_hintgv);
3538 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3539 SvREFCNT_inc_simple(PL_defgv);
3540 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3541 SvREFCNT_inc_simple(PL_errgv);
3542 GvMULTI_on(PL_errgv);
3543 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3544 GvMULTI_on(PL_replgv);
3545 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3546 #ifdef PERL_DONT_CREATE_GVSV
3549 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3550 sv_setpvn(ERRSV, "", 0);
3551 PL_curstash = PL_defstash;
3552 CopSTASH_set(&PL_compiling, PL_defstash);
3553 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3554 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3556 /* We must init $/ before switches are processed. */
3557 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3561 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3567 const char *cpp_discard_flag;
3576 PL_origfilename = savepvs("-e");
3579 /* if find_script() returns, it returns a malloc()-ed value */
3580 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3582 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3583 const char *s = scriptname + 8;
3589 * Tell apart "normal" usage of fdscript, e.g.
3590 * with bash on FreeBSD:
3591 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3592 * from usage in suidperl.
3593 * Does any "normal" usage leave garbage after the number???
3594 * Is it a mistake to use a similar /dev/fd/ construct for
3599 * Be supersafe and do some sanity-checks.
3600 * Still, can we be sure we got the right thing?
3603 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3606 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3608 scriptname = savepv(s + 1);
3609 Safefree(PL_origfilename);
3610 PL_origfilename = (char *)scriptname;
3615 CopFILE_free(PL_curcop);
3616 CopFILE_set(PL_curcop, PL_origfilename);
3617 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3618 scriptname = (char *)"";
3619 if (fdscript >= 0) {
3620 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3621 # if defined(HAS_FCNTL) && defined(F_SETFD)
3623 /* ensure close-on-exec */
3624 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3629 Perl_croak(aTHX_ "sperl needs fd script\n"
3630 "You should not call sperl directly; do you need to "
3631 "change a #! line\nfrom sperl to perl?\n");
3634 * Do not open (or do other fancy stuff) while setuid.
3635 * Perl does the open, and hands script to suidperl on a fd;
3636 * suidperl only does some checks, sets up UIDs and re-execs
3637 * perl with that fd as it has always done.
3640 if (*suidscript != 1) {
3641 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3644 else if (PL_preprocess) {
3645 const char * const cpp_cfg = CPPSTDIN;
3646 SV * const cpp = newSVpvs("");
3647 SV * const cmd = newSV(0);
3649 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3650 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3651 if (strEQ(cpp_cfg, "cppstdin"))
3652 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3653 sv_catpv(cpp, cpp_cfg);
3656 sv_catpvs(sv, "-I");
3657 sv_catpv(sv,PRIVLIB_EXP);
3660 DEBUG_P(PerlIO_printf(Perl_debug_log,
3661 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3662 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3665 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3672 cpp_discard_flag = "";
3674 cpp_discard_flag = "-C";
3678 perl = os2_execname(aTHX);
3680 perl = PL_origargv[0];
3684 /* This strips off Perl comments which might interfere with
3685 the C pre-processor, including #!. #line directives are
3686 deliberately stripped to avoid confusion with Perl's version
3687 of #line. FWP played some golf with it so it will fit
3688 into VMS's 255 character buffer.
3691 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3693 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3695 Perl_sv_setpvf(aTHX_ cmd, "\
3696 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3697 perl, quote, code, quote, scriptname, SVfARG(cpp),
3698 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3700 PL_doextract = FALSE;
3702 DEBUG_P(PerlIO_printf(Perl_debug_log,
3703 "PL_preprocess: cmd=\"%s\"\n",
3706 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3710 else if (!*scriptname) {
3711 forbid_setid(0, *suidscript);
3712 PL_rsfp = PerlIO_stdin();
3715 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3716 # if defined(HAS_FCNTL) && defined(F_SETFD)
3718 /* ensure close-on-exec */
3719 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3722 #endif /* IAMSUID */
3724 /* PSz 16 Sep 03 Keep neat error message */
3726 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3728 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3729 CopFILE(PL_curcop), Strerror(errno));
3735 * I_SYSSTATVFS HAS_FSTATVFS
3737 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3738 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3739 * here so that metaconfig picks them up. */
3743 S_fd_on_nosuid_fs(pTHX_ int fd)
3746 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3747 * but is needed also on machines without setreuid.
3748 * Seems safe enough to run as root.
3750 int check_okay = 0; /* able to do all the required sys/libcalls */
3751 int on_nosuid = 0; /* the fd is on a nosuid fs */
3753 * Need to check noexec also: nosuid might not be set, the average
3754 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3756 int on_noexec = 0; /* the fd is on a noexec fs */
3759 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3760 * fstatvfs() is UNIX98.
3761 * fstatfs() is 4.3 BSD.
3762 * ustat()+getmnt() is pre-4.3 BSD.
3763 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3764 * an irrelevant filesystem while trying to reach the right one.
3767 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3769 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3770 defined(HAS_FSTATVFS)
3771 # define FD_ON_NOSUID_CHECK_OKAY
3772 struct statvfs stfs;
3774 check_okay = fstatvfs(fd, &stfs) == 0;
3775 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3777 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3778 on platforms where it is present. */
3779 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3781 # endif /* fstatvfs */
3783 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3784 defined(PERL_MOUNT_NOSUID) && \
3785 defined(PERL_MOUNT_NOEXEC) && \
3786 defined(HAS_FSTATFS) && \
3787 defined(HAS_STRUCT_STATFS) && \
3788 defined(HAS_STRUCT_STATFS_F_FLAGS)
3789 # define FD_ON_NOSUID_CHECK_OKAY
3792 check_okay = fstatfs(fd, &stfs) == 0;
3793 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3794 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3795 # endif /* fstatfs */
3797 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3798 defined(PERL_MOUNT_NOSUID) && \
3799 defined(PERL_MOUNT_NOEXEC) && \
3800 defined(HAS_FSTAT) && \
3801 defined(HAS_USTAT) && \
3802 defined(HAS_GETMNT) && \
3803 defined(HAS_STRUCT_FS_DATA) && \
3805 # define FD_ON_NOSUID_CHECK_OKAY
3808 if (fstat(fd, &fdst) == 0) {
3810 if (ustat(fdst.st_dev, &us) == 0) {
3812 /* NOSTAT_ONE here because we're not examining fields which
3813 * vary between that case and STAT_ONE. */
3814 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3815 size_t cmplen = sizeof(us.f_fname);
3816 if (sizeof(fsd.fd_req.path) < cmplen)
3817 cmplen = sizeof(fsd.fd_req.path);
3818 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3819 fdst.st_dev == fsd.fd_req.dev) {
3821 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3822 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3827 # endif /* fstat+ustat+getmnt */
3829 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3830 defined(HAS_GETMNTENT) && \
3831 defined(HAS_HASMNTOPT) && \
3832 defined(MNTOPT_NOSUID) && \
3833 defined(MNTOPT_NOEXEC)
3834 # define FD_ON_NOSUID_CHECK_OKAY
3835 FILE *mtab = fopen("/etc/mtab", "r");
3836 struct mntent *entry;
3839 if (mtab && (fstat(fd, &stb) == 0)) {
3840 while (entry = getmntent(mtab)) {
3841 if (stat(entry->mnt_dir, &fsb) == 0
3842 && fsb.st_dev == stb.st_dev)
3844 /* found the filesystem */
3846 if (hasmntopt(entry, MNTOPT_NOSUID))
3848 if (hasmntopt(entry, MNTOPT_NOEXEC))
3851 } /* A single fs may well fail its stat(). */
3856 # endif /* getmntent+hasmntopt */
3859 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3861 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3863 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3864 return ((!check_okay) || on_nosuid || on_noexec);
3866 #endif /* IAMSUID */
3869 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3870 int fdscript, int suidscript)
3875 #endif /* IAMSUID */
3877 /* do we need to emulate setuid on scripts? */
3879 /* This code is for those BSD systems that have setuid #! scripts disabled
3880 * in the kernel because of a security problem. Merely defining DOSUID
3881 * in perl will not fix that problem, but if you have disabled setuid
3882 * scripts in the kernel, this will attempt to emulate setuid and setgid
3883 * on scripts that have those now-otherwise-useless bits set. The setuid
3884 * root version must be called suidperl or sperlN.NNN. If regular perl
3885 * discovers that it has opened a setuid script, it calls suidperl with
3886 * the same argv that it had. If suidperl finds that the script it has
3887 * just opened is NOT setuid root, it sets the effective uid back to the
3888 * uid. We don't just make perl setuid root because that loses the
3889 * effective uid we had before invoking perl, if it was different from the
3892 * Description/comments above do not match current workings:
3893 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3894 * suidperl called with script open and name changed to /dev/fd/N/X;
3895 * suidperl croaks if script is not setuid;
3896 * making perl setuid would be a huge security risk (and yes, that
3897 * would lose any euid we might have had).
3899 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3900 * be defined in suidperl only. suidperl must be setuid root. The
3901 * Configure script will set this up for you if you want it.
3907 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3908 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3909 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3911 const char *linestr;
3915 if (fdscript < 0 || suidscript != 1)
3916 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3918 * Since the script is opened by perl, not suidperl, some of these
3919 * checks are superfluous. Leaving them in probably does not lower
3923 * Do checks even for systems with no HAS_SETREUID.
3924 * We used to swap, then re-swap UIDs with
3926 if (setreuid(PL_euid,PL_uid) < 0
3927 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3928 Perl_croak(aTHX_ "Can't swap uid and euid");
3931 if (setreuid(PL_uid,PL_euid) < 0
3932 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3933 Perl_croak(aTHX_ "Can't reswap uid and euid");
3937 /* On this access check to make sure the directories are readable,
3938 * there is actually a small window that the user could use to make
3939 * filename point to an accessible directory. So there is a faint
3940 * chance that someone could execute a setuid script down in a
3941 * non-accessible directory. I don't know what to do about that.
3942 * But I don't think it's too important. The manual lies when
3943 * it says access() is useful in setuid programs.
3945 * So, access() is pretty useless... but not harmful... do anyway.
3947 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3948 Perl_croak(aTHX_ "Can't access() script\n");
3951 /* If we can swap euid and uid, then we can determine access rights
3952 * with a simple stat of the file, and then compare device and
3953 * inode to make sure we did stat() on the same file we opened.
3954 * Then we just have to make sure he or she can execute it.
3957 * As the script is opened by perl, not suidperl, we do not need to
3958 * care much about access rights.
3960 * The 'script changed' check is needed, or we can get lied to
3961 * about $0 with e.g.
3962 * suidperl /dev/fd/4//bin/x 4<setuidscript
3963 * Without HAS_SETREUID, is it safe to stat() as root?
3965 * Are there any operating systems that pass /dev/fd/xxx for setuid
3966 * scripts, as suggested/described in perlsec(1)? Surely they do not
3967 * pass the script name as we do, so the "script changed" test would
3968 * fail for them... but we never get here with
3969 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3971 * This is one place where we must "lie" about return status: not
3972 * say if the stat() failed. We are doing this as root, and could
3973 * be tricked into reporting existence or not of files that the
3974 * "plain" user cannot even see.
3978 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3979 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3980 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3981 Perl_croak(aTHX_ "Setuid script changed\n");
3985 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3986 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3989 * We used to do this check as the "plain" user (after swapping
3990 * UIDs). But the check for nosuid and noexec filesystem is needed,
3991 * and should be done even without HAS_SETREUID. (Maybe those
3992 * operating systems do not have such mount options anyway...)
3993 * Seems safe enough to do as root.
3995 #if !defined(NO_NOSUID_CHECK)
3996 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
3997 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4000 #endif /* IAMSUID */
4002 if (!S_ISREG(PL_statbuf.st_mode)) {
4003 Perl_croak(aTHX_ "Setuid script not plain file\n");
4005 if (PL_statbuf.st_mode & S_IWOTH)
4006 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4007 PL_doswitches = FALSE; /* -s is insecure in suid */
4008 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4009 CopLINE_inc(PL_curcop);
4010 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4011 Perl_croak(aTHX_ "No #! line");
4012 linestr = SvPV_nolen_const(PL_linestr);
4013 /* required even on Sys V */
4014 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4015 Perl_croak(aTHX_ "No #! line");
4019 /* Sanity check on line length */
4020 s_end = s + strlen(s);
4021 if (s_end == s || (s_end - s) > 4000)
4022 Perl_croak(aTHX_ "Very long #! line");
4023 /* Allow more than a single space after #! */
4024 while (isSPACE(*s)) s++;
4025 /* Sanity check on buffer end */
4026 while ((*s) && !isSPACE(*s)) s++;
4027 for (s2 = s; (s2 > linestr &&
4028 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4029 || s2[-1] == '-')); s2--) ;
4030 /* Sanity check on buffer start */
4031 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4032 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4033 Perl_croak(aTHX_ "Not a perl script");
4034 while (*s == ' ' || *s == '\t') s++;
4036 * #! arg must be what we saw above. They can invoke it by
4037 * mentioning suidperl explicitly, but they may not add any strange
4038 * arguments beyond what #! says if they do invoke suidperl that way.
4041 * The way validarg was set up, we rely on the kernel to start
4042 * scripts with argv[1] set to contain all #! line switches (the
4046 * Check that we got all the arguments listed in the #! line (not
4047 * just that there are no extraneous arguments). Might not matter
4048 * much, as switches from #! line seem to be acted upon (also), and
4049 * so may be checked and trapped in perl. But, security checks must
4050 * be done in suidperl and not deferred to perl. Note that suidperl
4051 * does not get around to parsing (and checking) the switches on
4052 * the #! line (but execs perl sooner).
4053 * Allow (require) a trailing newline (which may be of two
4054 * characters on some architectures?) (but no other trailing
4057 len = strlen(validarg);
4058 if (strEQ(validarg," PHOOEY ") ||
4059 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4060 !((s_end - s) == len+1
4061 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4062 Perl_croak(aTHX_ "Args must match #! line");
4066 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4067 PL_euid == PL_statbuf.st_uid)
4069 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4070 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4071 #endif /* IAMSUID */
4074 PL_euid) { /* oops, we're not the setuid root perl */
4076 * When root runs a setuid script, we do not go through the same
4077 * steps of execing sperl and then perl with fd scripts, but
4078 * simply set up UIDs within the same perl invocation; so do
4079 * not have the same checks (on options, whatever) that we have
4080 * for plain users. No problem really: would have to be a script
4081 * that does not actually work for plain users; and if root is
4082 * foolish and can be persuaded to run such an unsafe script, he
4083 * might run also non-setuid ones, and deserves what he gets.
4085 * Or, we might drop the PL_euid check above (and rely just on
4086 * fdscript to avoid loops), and do the execs
4092 * Pass fd script to suidperl.
4093 * Exec suidperl, substituting fd script for scriptname.
4094 * Pass script name as "subdir" of fd, which perl will grok;
4095 * in fact will use that to distinguish this from "normal"
4096 * usage, see comments above.
4098 PerlIO_rewind(PL_rsfp);
4099 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4100 /* PSz 27 Feb 04 Sanity checks on scriptname */
4101 if ((!scriptname) || (!*scriptname) ) {
4102 Perl_croak(aTHX_ "No setuid script name\n");
4104 if (*scriptname == '-') {
4105 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4106 /* Or we might confuse it with an option when replacing
4107 * name in argument list, below (though we do pointer, not
4108 * string, comparisons).
4111 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4112 if (!PL_origargv[which]) {
4113 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4115 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4116 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4117 #if defined(HAS_FCNTL) && defined(F_SETFD)
4118 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4121 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4122 (int)PERL_REVISION, (int)PERL_VERSION,
4123 (int)PERL_SUBVERSION), PL_origargv);
4125 #endif /* IAMSUID */
4126 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4129 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4131 * This seems back to front: we try HAS_SETEGID first; if not available
4132 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4133 * in the sense that we only want to set EGID; but are there any machines
4134 * with either of the latter, but not the former? Same with UID, later.
4137 (void)setegid(PL_statbuf.st_gid);
4140 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4142 #ifdef HAS_SETRESGID
4143 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4145 PerlProc_setgid(PL_statbuf.st_gid);
4149 if (PerlProc_getegid() != PL_statbuf.st_gid)
4150 Perl_croak(aTHX_ "Can't do setegid!\n");
4152 if (PL_statbuf.st_mode & S_ISUID) {
4153 if (PL_statbuf.st_uid != PL_euid)
4155 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4158 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4160 #ifdef HAS_SETRESUID
4161 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4163 PerlProc_setuid(PL_statbuf.st_uid);
4167 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4168 Perl_croak(aTHX_ "Can't do seteuid!\n");
4170 else if (PL_uid) { /* oops, mustn't run as root */
4172 (void)seteuid((Uid_t)PL_uid);
4175 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4177 #ifdef HAS_SETRESUID
4178 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4180 PerlProc_setuid((Uid_t)PL_uid);
4184 if (PerlProc_geteuid() != PL_uid)
4185 Perl_croak(aTHX_ "Can't do seteuid!\n");
4188 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4189 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4192 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4193 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4194 else if (fdscript < 0 || suidscript != 1)
4195 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4196 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4198 /* PSz 16 Sep 03 Keep neat error message */
4199 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4202 /* We absolutely must clear out any saved ids here, so we */
4203 /* exec the real perl, substituting fd script for scriptname. */
4204 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4206 * It might be thought that using setresgid and/or setresuid (changed to
4207 * set the saved IDs) above might obviate the need to exec, and we could
4208 * go on to "do the perl thing".
4210 * Is there such a thing as "saved GID", and is that set for setuid (but
4211 * not setgid) execution like suidperl? Without exec, it would not be
4212 * cleared for setuid (but not setgid) scripts (or might need a dummy
4215 * We need suidperl to do the exact same argument checking that perl
4216 * does. Thus it cannot be very small; while it could be significantly
4217 * smaller, it is safer (simpler?) to make it essentially the same
4218 * binary as perl (but they are not identical). - Maybe could defer that
4219 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4220 * but prefer to do thorough checks in suidperl itself. Such deferral
4221 * would make suidperl security rely on perl, a design no-no.
4223 * Setuid things should be short and simple, thus easy to understand and
4224 * verify. They should do their "own thing", without influence by
4225 * attackers. It may help if their internal execution flow is fixed,
4226 * regardless of platform: it may be best to exec anyway.
4228 * Suidperl should at least be conceptually simple: a wrapper only,
4229 * never to do any real perl. Maybe we should put
4231 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4233 * into the perly bits.
4235 PerlIO_rewind(PL_rsfp);
4236 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4238 * Keep original arguments: suidperl already has fd script.
4240 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4241 /* if (!PL_origargv[which]) { */
4242 /* errno = EPERM; */
4243 /* Perl_croak(aTHX_ "Permission denied\n"); */
4245 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4246 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4247 #if defined(HAS_FCNTL) && defined(F_SETFD)
4248 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4251 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4252 (int)PERL_REVISION, (int)PERL_VERSION,
4253 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4255 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4256 #endif /* IAMSUID */
4258 PERL_UNUSED_ARG(fdscript);
4259 PERL_UNUSED_ARG(suidscript);
4260 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4261 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4262 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4263 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4265 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4268 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4269 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4270 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4271 /* not set-id, must be wrapped */
4274 PERL_UNUSED_ARG(validarg);
4275 PERL_UNUSED_ARG(scriptname);
4279 S_find_beginning(pTHX)
4283 register const char *s2;
4284 #ifdef MACOS_TRADITIONAL
4288 /* skip forward in input to the real script? */
4290 #ifdef MACOS_TRADITIONAL
4291 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4293 while (PL_doextract || gMacPerl_AlwaysExtract) {
4294 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4295 if (!gMacPerl_AlwaysExtract)
4296 Perl_croak(aTHX_ "No Perl script found in input\n");
4298 if (PL_doextract) /* require explicit override ? */
4299 if (!OverrideExtract(PL_origfilename))
4300 Perl_croak(aTHX_ "User aborted script\n");
4302 PL_doextract = FALSE;
4304 /* Pater peccavi, file does not have #! */
4305 PerlIO_rewind(PL_rsfp);
4310 while (PL_doextract) {
4311 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4312 Perl_croak(aTHX_ "No Perl script found in input\n");
4315 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4316 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4317 PL_doextract = FALSE;
4318 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4320 while (*s == ' ' || *s == '\t') s++;
4322 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4323 || s2[-1] == '_') s2--;
4324 if (strnEQ(s2-4,"perl",4))
4325 while ((s = moreswitches(s)))
4328 #ifdef MACOS_TRADITIONAL
4329 /* We are always searching for the #!perl line in MacPerl,
4330 * so if we find it, still keep the line count correct
4331 * by counting lines we already skipped over
4333 for (; maclines > 0 ; maclines--)
4334 PerlIO_ungetc(PL_rsfp, '\n');
4338 /* gMacPerl_AlwaysExtract is false in MPW tool */
4339 } else if (gMacPerl_AlwaysExtract) {
4351 PL_uid = PerlProc_getuid();
4352 PL_euid = PerlProc_geteuid();
4353 PL_gid = PerlProc_getgid();
4354 PL_egid = PerlProc_getegid();
4356 PL_uid |= PL_gid << 16;
4357 PL_euid |= PL_egid << 16;
4359 /* Should not happen: */
4360 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4361 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4364 * Should go by suidscript, not uid!=euid: why disallow
4365 * system("ls") in scripts run from setuid things?
4366 * Or, is this run before we check arguments and set suidscript?
4367 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4368 * (We never have suidscript, can we be sure to have fdscript?)
4369 * Or must then go by UID checks? See comments in forbid_setid also.
4373 /* This is used very early in the lifetime of the program,
4374 * before even the options are parsed, so PL_tainting has
4375 * not been initialized properly. */
4377 Perl_doing_taint(int argc, char *argv[], char *envp[])
4379 #ifndef PERL_IMPLICIT_SYS
4380 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4381 * before we have an interpreter-- and the whole point of this
4382 * function is to be called at such an early stage. If you are on
4383 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4384 * "tainted because running with altered effective ids', you'll
4385 * have to add your own checks somewhere in here. The two most
4386 * known samples of 'implicitness' are Win32 and NetWare, neither
4387 * of which has much of concept of 'uids'. */
4388 int uid = PerlProc_getuid();
4389 int euid = PerlProc_geteuid();
4390 int gid = PerlProc_getgid();
4391 int egid = PerlProc_getegid();
4398 if (uid && (euid != uid || egid != gid))
4400 #endif /* !PERL_IMPLICIT_SYS */
4401 /* This is a really primitive check; environment gets ignored only
4402 * if -T are the first chars together; otherwise one gets
4403 * "Too late" message. */
4404 if ( argc > 1 && argv[1][0] == '-'
4405 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4410 /* Passing the flag as a single char rather than a string is a slight space
4411 optimisation. The only message that isn't /^-.$/ is
4412 "program input from stdin", which is substituted in place of '\0', which
4413 could never be a command line flag. */
4415 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4418 char string[3] = "-x";
4419 const char *message = "program input from stdin";
4426 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4427 if (PL_euid != PL_uid)
4428 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4429 if (PL_egid != PL_gid)
4430 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4431 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4433 * Checks for UID/GID above "wrong": why disallow
4434 * perl -e 'print "Hello\n"'
4435 * from within setuid things?? Simply drop them: replaced by
4436 * fdscript/suidscript and #ifdef IAMSUID checks below.
4438 * This may be too late for command-line switches. Will catch those on
4439 * the #! line, after finding the script name and setting up
4440 * fdscript/suidscript. Note that suidperl does not get around to
4441 * parsing (and checking) the switches on the #! line, but checks that
4442 * the two sets are identical.
4444 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4445 * instead, or would that be "too late"? (We never have suidscript, can
4446 * we be sure to have fdscript?)
4448 * Catch things with suidscript (in descendant of suidperl), even with
4449 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4450 * below; but I am paranoid.
4452 * Also see comments about root running a setuid script, elsewhere.
4454 if (suidscript >= 0)
4455 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4457 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4458 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4459 #endif /* IAMSUID */
4463 Perl_init_debugger(pTHX)
4466 HV * const ostash = PL_curstash;
4468 PL_curstash = PL_debstash;
4469 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4471 AvREAL_off(PL_dbargs);
4472 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4473 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4474 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4475 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4476 sv_setiv(PL_DBsingle, 0);
4477 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4478 sv_setiv(PL_DBtrace, 0);
4479 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4480 sv_setiv(PL_DBsignal, 0);
4481 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4482 sv_setiv(PL_DBassertion, 0);
4483 PL_curstash = ostash;
4486 #ifndef STRESS_REALLOC
4487 #define REASONABLE(size) (size)
4489 #define REASONABLE(size) (1) /* unreasonable */
4493 Perl_init_stacks(pTHX)
4496 /* start with 128-item stack and 8K cxstack */
4497 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4498 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4499 PL_curstackinfo->si_type = PERLSI_MAIN;
4500 PL_curstack = PL_curstackinfo->si_stack;
4501 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4503 PL_stack_base = AvARRAY(PL_curstack);
4504 PL_stack_sp = PL_stack_base;
4505 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4507 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4510 PL_tmps_max = REASONABLE(128);
4512 Newx(PL_markstack,REASONABLE(32),I32);
4513 PL_markstack_ptr = PL_markstack;
4514 PL_markstack_max = PL_markstack + REASONABLE(32);
4518 Newx(PL_scopestack,REASONABLE(32),I32);
4519 PL_scopestack_ix = 0;
4520 PL_scopestack_max = REASONABLE(32);
4522 Newx(PL_savestack,REASONABLE(128),ANY);
4523 PL_savestack_ix = 0;
4524 PL_savestack_max = REASONABLE(128);
4533 while (PL_curstackinfo->si_next)
4534 PL_curstackinfo = PL_curstackinfo->si_next;
4535 while (PL_curstackinfo) {
4536 PERL_SI *p = PL_curstackinfo->si_prev;
4537 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4538 Safefree(PL_curstackinfo->si_cxstack);
4539 Safefree(PL_curstackinfo);
4540 PL_curstackinfo = p;
4542 Safefree(PL_tmps_stack);
4543 Safefree(PL_markstack);
4544 Safefree(PL_scopestack);
4545 Safefree(PL_savestack);
4555 lex_start(PL_linestr);
4557 PL_subname = newSVpvs("main");
4561 S_init_predump_symbols(pTHX)
4567 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4568 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4569 GvMULTI_on(PL_stdingv);
4570 io = GvIOp(PL_stdingv);
4571 IoTYPE(io) = IoTYPE_RDONLY;
4572 IoIFP(io) = PerlIO_stdin();
4573 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4575 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4577 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4580 IoTYPE(io) = IoTYPE_WRONLY;
4581 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4583 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4585 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4587 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4588 GvMULTI_on(PL_stderrgv);
4589 io = GvIOp(PL_stderrgv);
4590 IoTYPE(io) = IoTYPE_WRONLY;
4591 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4592 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4594 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4596 PL_statname = newSV(0); /* last filename we did stat on */
4598 Safefree(PL_osname);
4599 PL_osname = savepv(OSNAME);
4603 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4606 argc--,argv++; /* skip name of script */
4607 if (PL_doswitches) {
4608 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4612 if (argv[0][1] == '-' && !argv[0][2]) {
4616 if ((s = strchr(argv[0], '='))) {
4617 const char *const start_name = argv[0] + 1;
4618 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4619 TRUE, SVt_PV)), s + 1);
4622 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4625 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4626 GvMULTI_on(PL_argvgv);
4627 (void)gv_AVadd(PL_argvgv);
4628 av_clear(GvAVn(PL_argvgv));
4629 for (; argc > 0; argc--,argv++) {
4630 SV * const sv = newSVpv(argv[0],0);
4631 av_push(GvAVn(PL_argvgv),sv);
4632 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4633 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4636 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4637 (void)sv_utf8_decode(sv);
4643 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4648 PL_toptarget = newSV(0);
4649 sv_upgrade(PL_toptarget, SVt_PVFM);
4650 sv_setpvn(PL_toptarget, "", 0);
4651 PL_bodytarget = newSV(0);
4652 sv_upgrade(PL_bodytarget, SVt_PVFM);
4653 sv_setpvn(PL_bodytarget, "", 0);
4654 PL_formtarget = PL_bodytarget;
4658 init_argv_symbols(argc,argv);
4660 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4661 #ifdef MACOS_TRADITIONAL
4662 /* $0 is not majick on a Mac */
4663 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4665 sv_setpv(GvSV(tmpgv),PL_origfilename);
4666 magicname("0", "0", 1);
4669 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4671 bool env_is_not_environ;
4672 GvMULTI_on(PL_envgv);
4673 hv = GvHVn(PL_envgv);
4674 hv_magic(hv, NULL, PERL_MAGIC_env);
4676 #ifdef USE_ENVIRON_ARRAY
4677 /* Note that if the supplied env parameter is actually a copy
4678 of the global environ then it may now point to free'd memory
4679 if the environment has been modified since. To avoid this
4680 problem we treat env==NULL as meaning 'use the default'
4684 env_is_not_environ = env != environ;
4685 if (env_is_not_environ
4686 # ifdef USE_ITHREADS
4687 && PL_curinterp == aTHX
4696 for (; *env; env++) {
4697 if (!(s = strchr(*env,'=')) || s == *env)
4699 #if defined(MSDOS) && !defined(DJGPP)
4704 sv = newSVpv(s+1, 0);
4705 (void)hv_store(hv, *env, s - *env, sv, 0);
4706 if (env_is_not_environ)
4710 #endif /* USE_ENVIRON_ARRAY */
4711 #endif /* !PERL_MICRO */
4714 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4715 SvREADONLY_off(GvSV(tmpgv));
4716 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4717 SvREADONLY_on(GvSV(tmpgv));
4719 #ifdef THREADS_HAVE_PIDS
4720 PL_ppid = (IV)getppid();
4723 /* touch @F array to prevent spurious warnings 20020415 MJD */
4725 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4727 /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */
4728 (void) get_av("main::-", TRUE | GV_ADDMULTI);
4729 (void) get_av("main::+", TRUE | GV_ADDMULTI);
4733 S_init_perllib(pTHX)
4739 s = PerlEnv_getenv("PERL5LIB");
4741 * It isn't possible to delete an environment variable with
4742 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4743 * case we treat PERL5LIB as undefined if it has a zero-length value.
4745 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4746 if (s && *s != '\0')
4750 incpush(s, TRUE, TRUE, TRUE, FALSE);
4752 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4754 /* Treat PERL5?LIB as a possible search list logical name -- the
4755 * "natural" VMS idiom for a Unix path string. We allow each
4756 * element to be a set of |-separated directories for compatibility.
4760 if (my_trnlnm("PERL5LIB",buf,0))
4761 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4763 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4767 /* Use the ~-expanded versions of APPLLIB (undocumented),
4768 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4771 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4775 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4777 #ifdef MACOS_TRADITIONAL
4780 SV * privdir = newSV(0);
4781 char * macperl = PerlEnv_getenv("MACPERL");
4786 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4787 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4788 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4789 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4790 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4791 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4793 SvREFCNT_dec(privdir);
4796 incpush(":", FALSE, FALSE, TRUE, FALSE);
4799 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4802 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4804 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4808 /* sitearch is always relative to sitelib on Windows for
4809 * DLL-based path intuition to work correctly */
4810 # if !defined(WIN32)
4811 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4817 /* this picks up sitearch as well */
4818 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4820 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4824 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4825 /* Search for version-specific dirs below here */
4826 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4829 #ifdef PERL_VENDORARCH_EXP
4830 /* vendorarch is always relative to vendorlib on Windows for
4831 * DLL-based path intuition to work correctly */
4832 # if !defined(WIN32)
4833 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4837 #ifdef PERL_VENDORLIB_EXP
4839 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4841 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4845 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4846 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4849 #ifdef PERL_OTHERLIBDIRS
4850 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4854 incpush(".", FALSE, FALSE, TRUE, FALSE);
4855 #endif /* MACOS_TRADITIONAL */
4858 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4859 # define PERLLIB_SEP ';'
4862 # define PERLLIB_SEP '|'
4864 # if defined(MACOS_TRADITIONAL)
4865 # define PERLLIB_SEP ','
4867 # define PERLLIB_SEP ':'
4871 #ifndef PERLLIB_MANGLE
4872 # define PERLLIB_MANGLE(s,n) (s)
4875 /* Push a directory onto @INC if it exists.
4876 Generate a new SV if we do this, to save needing to copy the SV we push
4879 S_incpush_if_exists(pTHX_ SV *dir)
4883 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4884 S_ISDIR(tmpstatbuf.st_mode)) {
4885 av_push(GvAVn(PL_incgv), dir);
4892 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4897 const char *p = dir;
4902 if (addsubdirs || addoldvers) {
4906 /* Break at all separators */
4908 SV *libdir = newSV(0);
4911 /* skip any consecutive separators */
4913 while ( *p == PERLLIB_SEP ) {
4914 /* Uncomment the next line for PATH semantics */
4915 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4920 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4921 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4926 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4927 p = NULL; /* break out */
4929 #ifdef MACOS_TRADITIONAL
4930 if (!strchr(SvPVX(libdir), ':')) {
4933 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4935 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4936 sv_catpvs(libdir, ":");
4939 /* Do the if() outside the #ifdef to avoid warnings about an unused
4942 #ifdef PERL_RELOCATABLE_INC
4944 * Relocatable include entries are marked with a leading .../
4947 * 0: Remove that leading ".../"
4948 * 1: Remove trailing executable name (anything after the last '/')
4949 * from the perl path to give a perl prefix
4951 * While the @INC element starts "../" and the prefix ends with a real
4952 * directory (ie not . or ..) chop that real directory off the prefix
4953 * and the leading "../" from the @INC element. ie a logical "../"
4955 * Finally concatenate the prefix and the remainder of the @INC element
4956 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4957 * generates /usr/local/lib/perl5
4959 const char *libpath = SvPVX(libdir);
4960 STRLEN libpath_len = SvCUR(libdir);
4961 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4963 SV * const caret_X = get_sv("\030", 0);
4964 /* Going to use the SV just as a scratch buffer holding a C
4970 /* $^X is *the* source of taint if tainting is on, hence
4971 SvPOK() won't be true. */
4973 assert(SvPOKp(caret_X));
4974 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4975 /* Firstly take off the leading .../
4976 If all else fail we'll do the paths relative to the current
4978 sv_chop(libdir, libpath + 4);
4979 /* Don't use SvPV as we're intentionally bypassing taining,
4980 mortal copies that the mg_get of tainting creates, and
4981 corruption that seems to come via the save stack.
4982 I guess that the save stack isn't correctly set up yet. */
4983 libpath = SvPVX(libdir);
4984 libpath_len = SvCUR(libdir);
4986 /* This would work more efficiently with memrchr, but as it's
4987 only a GNU extension we'd need to probe for it and
4988 implement our own. Not hard, but maybe not worth it? */
4990 prefix = SvPVX(prefix_sv);
4991 lastslash = strrchr(prefix, '/');
4993 /* First time in with the *lastslash = '\0' we just wipe off
4994 the trailing /perl from (say) /usr/foo/bin/perl
4998 while ((*lastslash = '\0'), /* Do that, come what may. */
4999 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5000 && (lastslash = strrchr(prefix, '/')))) {
5001 if (lastslash[1] == '\0'
5002 || (lastslash[1] == '.'
5003 && (lastslash[2] == '/' /* ends "/." */
5004 || (lastslash[2] == '/'
5005 && lastslash[3] == '/' /* or "/.." */
5007 /* Prefix ends "/" or "/." or "/..", any of which
5008 are fishy, so don't do any more logical cleanup.
5012 /* Remove leading "../" from path */
5015 /* Next iteration round the loop removes the last
5016 directory name from prefix by writing a '\0' in
5017 the while clause. */
5019 /* prefix has been terminated with a '\0' to the correct
5020 length. libpath points somewhere into the libdir SV.
5021 We need to join the 2 with '/' and drop the result into
5023 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5024 SvREFCNT_dec(libdir);
5025 /* And this is the new libdir. */
5028 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5029 /* Need to taint reloccated paths if running set ID */
5030 SvTAINTED_on(libdir);
5033 SvREFCNT_dec(prefix_sv);
5038 * BEFORE pushing libdir onto @INC we may first push version- and
5039 * archname-specific sub-directories.
5041 if (addsubdirs || addoldvers) {
5042 #ifdef PERL_INC_VERSION_LIST
5043 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5044 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5045 const char * const *incver;
5051 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5053 while (unix[len-1] == '/') len--; /* Cosmetic */
5054 sv_usepvn(libdir,unix,len);
5057 PerlIO_printf(Perl_error_log,
5058 "Failed to unixify @INC element \"%s\"\n",
5062 #ifdef MACOS_TRADITIONAL
5063 #define PERL_AV_SUFFIX_FMT ""
5064 #define PERL_ARCH_FMT "%s:"
5065 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5067 #define PERL_AV_SUFFIX_FMT "/"
5068 #define PERL_ARCH_FMT "/%s"
5069 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5071 /* .../version/archname if -d .../version/archname */
5072 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5074 (int)PERL_REVISION, (int)PERL_VERSION,
5075 (int)PERL_SUBVERSION, ARCHNAME);
5076 subdir = S_incpush_if_exists(aTHX_ subdir);
5078 /* .../version if -d .../version */
5079 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5081 (int)PERL_REVISION, (int)PERL_VERSION,
5082 (int)PERL_SUBVERSION);
5083 subdir = S_incpush_if_exists(aTHX_ subdir);
5085 /* .../archname if -d .../archname */
5086 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5087 SVfARG(libdir), ARCHNAME);
5088 subdir = S_incpush_if_exists(aTHX_ subdir);
5092 #ifdef PERL_INC_VERSION_LIST
5094 for (incver = incverlist; *incver; incver++) {
5095 /* .../xxx if -d .../xxx */
5096 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5097 SVfARG(libdir), *incver);
5098 subdir = S_incpush_if_exists(aTHX_ subdir);
5104 /* finally push this lib directory on the end of @INC */
5105 av_push(GvAVn(PL_incgv), libdir);
5108 assert (SvREFCNT(subdir) == 1);
5109 SvREFCNT_dec(subdir);
5115 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5119 const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5125 while (av_len(paramList) >= 0) {
5126 cv = (CV*)av_shift(paramList);
5128 if (paramList == PL_beginav) {
5129 /* save PL_beginav for compiler */
5130 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5132 else if (paramList == PL_checkav) {
5133 /* save PL_checkav for compiler */
5134 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5136 else if (paramList == PL_unitcheckav) {
5137 /* save PL_unitcheckav for compiler */
5138 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5149 PL_madskills |= 16384;
5154 PL_madskills &= ~16384;
5157 (void)SvPV_const(atsv, len);
5158 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5159 break; /* not really trying to run, so just wing it */
5161 PL_curcop = &PL_compiling;
5162 CopLINE_set(PL_curcop, oldline);
5163 if (paramList == PL_beginav)
5164 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5166 Perl_sv_catpvf(aTHX_ atsv,
5167 "%s failed--call queue aborted",
5168 paramList == PL_checkav ? "CHECK"
5169 : paramList == PL_initav ? "INIT"
5170 : paramList == PL_unitcheckav ? "UNITCHECK"
5172 while (PL_scopestack_ix > oldscope)
5175 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5182 /* my_exit() was called */
5183 while (PL_scopestack_ix > oldscope)
5186 PL_curstash = PL_defstash;
5187 PL_curcop = &PL_compiling;
5188 CopLINE_set(PL_curcop, oldline);
5190 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5191 return; /* not really trying to run, so just wing it */
5192 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5193 if (paramList == PL_beginav)
5194 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5196 Perl_croak(aTHX_ "%s failed--call queue aborted",
5197 paramList == PL_checkav ? "CHECK"
5198 : paramList == PL_initav ? "INIT"
5199 : paramList == PL_unitcheckav ? "UNITCHECK"
5206 PL_curcop = &PL_compiling;
5207 CopLINE_set(PL_curcop, oldline);
5210 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5219 Perl_my_exit(pTHX_ U32 status)
5222 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5223 (void*)thr, (unsigned long) status));
5232 STATUS_EXIT_SET(status);
5239 Perl_my_failure_exit(pTHX)
5243 /* We have been called to fall on our sword. The desired exit code
5244 * should be already set in STATUS_UNIX, but could be shifted over
5245 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5248 * If an error code has not been set, then force the issue.
5250 if (MY_POSIX_EXIT) {
5252 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5253 * the exit code when there isn't an error.
5256 if (STATUS_UNIX == 0)
5257 STATUS_UNIX_EXIT_SET(255);
5259 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5261 /* The exit code could have been set by $? or vmsish which
5262 * means that it may not be fatal. So convert
5263 * success/warning codes to fatal.
5265 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5266 STATUS_UNIX_EXIT_SET(255);
5270 /* Traditionally Perl on VMS always expects a Fatal Error. */
5271 if (vaxc$errno & 1) {
5273 /* So force success status to failure */
5274 if (STATUS_NATIVE & 1)
5279 STATUS_UNIX = EINTR; /* In case something cares */
5284 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5286 /* Encode the severity code */
5287 severity = STATUS_NATIVE & STS$M_SEVERITY;
5288 STATUS_UNIX = (severity ? severity : 1) << 8;
5290 /* Perl expects this to be a fatal error */
5291 if (severity != STS$K_SEVERE)
5300 STATUS_UNIX_SET(errno);
5302 exitstatus = STATUS_UNIX >> 8;
5303 if (exitstatus & 255)
5304 STATUS_UNIX_SET(exitstatus);
5306 STATUS_UNIX_SET(255);
5313 S_my_exit_jump(pTHX)
5318 SvREFCNT_dec(PL_e_script);
5322 POPSTACK_TO(PL_mainstack);
5330 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5333 const char * const p = SvPVX_const(PL_e_script);
5334 const char *nl = strchr(p, '\n');
5336 PERL_UNUSED_ARG(idx);
5337 PERL_UNUSED_ARG(maxlen);
5339 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5341 filter_del(read_e_script);
5344 sv_catpvn(buf_sv, p, nl-p);
5345 sv_chop(PL_e_script, nl);
5351 * c-indentation-style: bsd
5353 * indent-tabs-mode: t
5356 * ex: set ts=8 sts=4 sw=4 noet: