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_type(SVt_PVIV);
266 SvGROW(PL_linestr, 80);
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_MEM_LOG
1863 # ifdef PERL_MEM_LOG_ENV
1866 # ifdef PERL_MEM_LOG_ENV_FD
1867 " PERL_MEM_LOG_ENV_FD"
1869 # ifdef PERL_MEM_LOG_STDERR
1870 " PERL_MEM_LOG_STDERR"
1872 # ifdef PERL_MEM_LOG_TIMESTAMP
1873 " PERL_MEM_LOG_TIMESTAMP"
1875 # ifdef PERL_NEED_APPCTX
1878 # ifdef PERL_NEED_TIMESBASE
1879 " PERL_NEED_TIMESBASE"
1881 # ifdef PERL_OLD_COPY_ON_WRITE
1882 " PERL_OLD_COPY_ON_WRITE"
1887 # ifdef PERL_TRACK_MEMPOOL
1888 " PERL_TRACK_MEMPOOL"
1890 # ifdef PERL_USE_SAFE_PUTENV
1891 " PERL_USE_SAFE_PUTENV"
1893 # ifdef PERL_USES_PL_PIDSTATUS
1894 " PERL_USES_PL_PIDSTATUS"
1896 # ifdef PL_OP_SLAB_ALLOC
1899 # ifdef THREADS_HAVE_PIDS
1900 " THREADS_HAVE_PIDS"
1902 # ifdef USE_64_BIT_ALL
1905 # ifdef USE_64_BIT_INT
1908 # ifdef USE_ITHREADS
1911 # ifdef USE_LARGE_FILES
1914 # ifdef USE_LONG_DOUBLE
1920 # ifdef USE_REENTRANT_API
1921 " USE_REENTRANT_API"
1926 # ifdef USE_SITECUSTOMIZE
1927 " USE_SITECUSTOMIZE"
1934 while (SvCUR(opts_prog) > opts+76) {
1935 /* find last space after "options: " and before col 76
1939 char * const pv = SvPV_nolen(opts_prog);
1940 const char c = pv[opts+76];
1942 space = strrchr(pv+opts+26, ' ');
1944 if (!space) break; /* "Can't happen" */
1946 /* break the line before that space */
1949 Perl_sv_insert(aTHX_ opts_prog, opts, 0,
1950 STR_WITH_LEN("\\n "));
1953 sv_catpvs(opts_prog,"\\n\",");
1955 #if defined(LOCAL_PATCH_COUNT)
1956 if (LOCAL_PATCH_COUNT > 0) {
1958 sv_catpvs(opts_prog,
1959 "\" Locally applied patches:\\n\",");
1960 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1961 if (PL_localpatches[i])
1962 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1963 0, PL_localpatches[i], 0);
1967 Perl_sv_catpvf(aTHX_ opts_prog,
1968 "\" Built under %s\\n\"",OSNAME);
1971 Perl_sv_catpvf(aTHX_ opts_prog,
1972 ",\" Compiled at %s %s\\n\"",__DATE__,
1975 Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"",
1979 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1980 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1981 "sort grep {/^PERL/} keys %ENV; ");
1983 sv_catpvs(opts_prog,
1984 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1986 sv_catpvs(opts_prog,
1987 "print \" \\%ENV:\\n @env\\n\" if @env;"
1988 "print \" \\@INC:\\n @INC\\n\";");
1992 opts_prog = Perl_newSVpvf(aTHX_
1993 "Config::config_vars(qw%c%s%c)",
1997 av_push(PL_preambleav, opts_prog);
1998 /* don't look for script or read stdin */
1999 scriptname = BIT_BUCKET;
2003 PL_doextract = TRUE;
2011 if (!*++s || isSPACE(*s)) {
2015 /* catch use of gnu style long options */
2016 if (strEQ(s, "version")) {
2020 if (strEQ(s, "help")) {
2027 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2033 #ifndef SECURE_INTERNAL_GETENV
2036 (s = PerlEnv_getenv("PERL5OPT")))
2038 const char *popt = s;
2041 if (*s == '-' && *(s+1) == 'T') {
2042 CHECK_MALLOC_TOO_LATE_FOR('T');
2044 PL_taint_warn = FALSE;
2047 char *popt_copy = NULL;
2060 if (!strchr("CDIMUdmtwA", *s))
2061 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2065 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2066 s = popt_copy + (s - popt);
2067 d = popt_copy + (d - popt);
2074 if( !PL_tainting ) {
2075 PL_taint_warn = TRUE;
2085 #ifdef USE_SITECUSTOMIZE
2087 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2088 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2093 scriptname = argv[0];
2096 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2098 else if (scriptname == NULL) {
2100 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2106 /* Set $^X early so that it can be used for relocatable paths in @INC */
2107 assert (!PL_tainted);
2109 S_set_caret_X(aTHX);
2116 = open_script(scriptname, dosearch, sv, &suidscript);
2118 validate_suid(validarg, scriptname, fdscript, suidscript);
2121 # if defined(SIGCHLD) || defined(SIGCLD)
2124 # define SIGCHLD SIGCLD
2126 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2127 if (sigstate == (Sighandler_t) SIG_IGN) {
2128 if (ckWARN(WARN_SIGNAL))
2129 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2130 "Can't ignore signal CHLD, forcing to default");
2131 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2138 #ifdef MACOS_TRADITIONAL
2139 || gMacPerl_AlwaysExtract
2143 /* This will croak if suidscript is >= 0, as -x cannot be used with
2145 forbid_setid('x', suidscript);
2146 /* Hence you can't get here if suidscript >= 0 */
2149 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2150 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2154 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2155 CvUNIQUE_on(PL_compcv);
2157 CvPADLIST(PL_compcv) = pad_new(0);
2160 boot_core_UNIVERSAL();
2161 boot_core_xsutils();
2164 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2166 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2172 # ifdef HAS_SOCKS5_INIT
2173 socks5_init(argv[0]);
2179 init_predump_symbols();
2180 /* init_postdump_symbols not currently designed to be called */
2181 /* more than once (ENV isn't cleared first, for example) */
2182 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2184 init_postdump_symbols(argc,argv,env);
2186 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2187 * or explicitly in some platforms.
2188 * locale.c:Perl_init_i18nl10n() if the environment
2189 * look like the user wants to use UTF-8. */
2190 #if defined(__SYMBIAN32__)
2191 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2194 /* Requires init_predump_symbols(). */
2195 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2200 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2201 * and the default open disciplines. */
2202 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2203 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2205 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2206 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2207 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2209 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2210 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2211 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2213 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2214 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2215 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2217 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2218 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2221 sv_setpvn(sv, ":utf8\0:utf8", 11);
2223 sv_setpvn(sv, ":utf8\0", 6);
2226 sv_setpvn(sv, "\0:utf8", 6);
2232 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2233 if (strEQ(s, "unsafe"))
2234 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2235 else if (strEQ(s, "safe"))
2236 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2238 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2242 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2246 PL_xmlfp = PerlIO_stdout();
2248 PL_xmlfp = PerlIO_open(s, "w");
2250 Perl_croak(aTHX_ "Can't open %s", s);
2252 my_setenv("PERL_XMLDUMP", Nullch); /* hide from subprocs */
2254 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2255 PL_madskills = atoi(s);
2256 my_setenv("PERL_MADSKILLS", Nullch); /* hide from subprocs */
2262 /* now parse the script */
2264 SETERRNO(0,SS_NORMAL);
2266 #ifdef MACOS_TRADITIONAL
2267 if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) {
2269 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2271 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2272 MacPerl_MPWFileName(PL_origfilename));
2276 if (yyparse() || PL_error_count) {
2278 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2280 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2285 CopLINE_set(PL_curcop, 0);
2286 PL_curstash = PL_defstash;
2287 PL_preprocess = FALSE;
2289 SvREFCNT_dec(PL_e_script);
2297 SAVECOPFILE(PL_curcop);
2298 SAVECOPLINE(PL_curcop);
2299 gv_check(PL_defstash);
2306 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2307 dump_mstats("after compilation:");
2316 =for apidoc perl_run
2318 Tells a Perl interpreter to run. See L<perlembed>.
2331 PERL_UNUSED_ARG(my_perl);
2333 oldscope = PL_scopestack_ix;
2341 cxstack_ix = -1; /* start context stack again */
2343 case 0: /* normal completion */
2347 case 2: /* my_exit() */
2348 while (PL_scopestack_ix > oldscope)
2351 PL_curstash = PL_defstash;
2352 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2353 PL_endav && !PL_minus_c)
2354 call_list(oldscope, PL_endav);
2356 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2357 dump_mstats("after execution: ");
2363 POPSTACK_TO(PL_mainstack);
2366 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2378 S_run_body(pTHX_ I32 oldscope)
2381 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2382 PL_sawampersand ? "Enabling" : "Omitting"));
2384 if (!PL_restartop) {
2388 exit(0); /* less likely to core dump than my_exit(0) */
2391 DEBUG_x(dump_all());
2394 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2396 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2400 #ifdef MACOS_TRADITIONAL
2401 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2402 (gMacPerl_ErrorFormat ? "# " : ""),
2403 MacPerl_MPWFileName(PL_origfilename));
2405 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2409 if (PERLDB_SINGLE && PL_DBsingle)
2410 sv_setiv(PL_DBsingle, 1);
2412 call_list(oldscope, PL_initav);
2418 PL_op = PL_restartop;
2422 else if (PL_main_start) {
2423 CvDEPTH(PL_main_cv) = 1;
2424 PL_op = PL_main_start;
2432 =head1 SV Manipulation Functions
2434 =for apidoc p||get_sv
2436 Returns the SV of the specified Perl scalar. If C<create> is set and the
2437 Perl variable does not exist then it will be created. If C<create> is not
2438 set and the variable does not exist then NULL is returned.
2444 Perl_get_sv(pTHX_ const char *name, I32 create)
2447 gv = gv_fetchpv(name, create, SVt_PV);
2454 =head1 Array Manipulation Functions
2456 =for apidoc p||get_av
2458 Returns the AV of the specified Perl array. If C<create> is set and the
2459 Perl variable does not exist then it will be created. If C<create> is not
2460 set and the variable does not exist then NULL is returned.
2466 Perl_get_av(pTHX_ const char *name, I32 create)
2468 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2477 =head1 Hash Manipulation Functions
2479 =for apidoc p||get_hv
2481 Returns the HV of the specified Perl hash. If C<create> is set and the
2482 Perl variable does not exist then it will be created. If C<create> is not
2483 set and the variable does not exist then NULL is returned.
2489 Perl_get_hv(pTHX_ const char *name, I32 create)
2491 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2500 =head1 CV Manipulation Functions
2502 =for apidoc p||get_cvn_flags
2504 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2505 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2506 exist then it will be declared (which has the same effect as saying
2507 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2508 then NULL is returned.
2510 =for apidoc p||get_cv
2512 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2518 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2520 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2521 /* XXX this is probably not what they think they're getting.
2522 * It has the same effect as "sub name;", i.e. just a forward
2524 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2525 SV *const sv = newSVpvn(name,len);
2526 SvFLAGS(sv) |= flags & SVf_UTF8;
2527 return newSUB(start_subparse(FALSE, 0),
2528 newSVOP(OP_CONST, 0, sv),
2537 Perl_get_cv(pTHX_ const char *name, I32 flags)
2539 return get_cvn_flags(name, strlen(name), flags);
2542 /* Be sure to refetch the stack pointer after calling these routines. */
2546 =head1 Callback Functions
2548 =for apidoc p||call_argv
2550 Performs a callback to the specified Perl sub. See L<perlcall>.
2556 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2558 /* See G_* flags in cop.h */
2559 /* null terminated arg list */
2567 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2572 return call_pv(sub_name, flags);
2576 =for apidoc p||call_pv
2578 Performs a callback to the specified Perl sub. See L<perlcall>.
2584 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2585 /* name of the subroutine */
2586 /* See G_* flags in cop.h */
2588 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2592 =for apidoc p||call_method
2594 Performs a callback to the specified Perl method. The blessed object must
2595 be on the stack. See L<perlcall>.
2601 Perl_call_method(pTHX_ const char *methname, I32 flags)
2602 /* name of the subroutine */
2603 /* See G_* flags in cop.h */
2605 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2608 /* May be called with any of a CV, a GV, or an SV containing the name. */
2610 =for apidoc p||call_sv
2612 Performs a callback to the Perl sub whose name is in the SV. See
2619 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2620 /* See G_* flags in cop.h */
2623 LOGOP myop; /* fake syntax tree node */
2628 bool oldcatch = CATCH_GET;
2630 OP* const oldop = PL_op;
2633 if (flags & G_DISCARD) {
2638 Zero(&myop, 1, LOGOP);
2639 myop.op_next = NULL;
2640 if (!(flags & G_NOARGS))
2641 myop.op_flags |= OPf_STACKED;
2642 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2643 (flags & G_ARRAY) ? OPf_WANT_LIST :
2648 EXTEND(PL_stack_sp, 1);
2649 *++PL_stack_sp = sv;
2651 oldscope = PL_scopestack_ix;
2653 if (PERLDB_SUB && PL_curstash != PL_debstash
2654 /* Handle first BEGIN of -d. */
2655 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2656 /* Try harder, since this may have been a sighandler, thus
2657 * curstash may be meaningless. */
2658 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2659 && !(flags & G_NODEBUG))
2660 PL_op->op_private |= OPpENTERSUB_DB;
2662 if (flags & G_METHOD) {
2663 Zero(&method_op, 1, UNOP);
2664 method_op.op_next = PL_op;
2665 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2666 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2667 PL_op = (OP*)&method_op;
2670 if (!(flags & G_EVAL)) {
2672 CALL_BODY_SUB((OP*)&myop);
2673 retval = PL_stack_sp - (PL_stack_base + oldmark);
2674 CATCH_SET(oldcatch);
2677 myop.op_other = (OP*)&myop;
2679 create_eval_scope(flags|G_FAKINGEVAL);
2687 CALL_BODY_SUB((OP*)&myop);
2688 retval = PL_stack_sp - (PL_stack_base + oldmark);
2689 if (!(flags & G_KEEPERR))
2690 sv_setpvn(ERRSV,"",0);
2696 /* my_exit() was called */
2697 PL_curstash = PL_defstash;
2700 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2701 Perl_croak(aTHX_ "Callback called exit");
2706 PL_op = PL_restartop;
2710 PL_stack_sp = PL_stack_base + oldmark;
2711 if (flags & G_ARRAY)
2715 *++PL_stack_sp = &PL_sv_undef;
2720 if (PL_scopestack_ix > oldscope)
2721 delete_eval_scope();
2725 if (flags & G_DISCARD) {
2726 PL_stack_sp = PL_stack_base + oldmark;
2735 /* Eval a string. The G_EVAL flag is always assumed. */
2738 =for apidoc p||eval_sv
2740 Tells Perl to C<eval> the string in the SV.
2746 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2748 /* See G_* flags in cop.h */
2752 UNOP myop; /* fake syntax tree node */
2753 VOL I32 oldmark = SP - PL_stack_base;
2756 OP* const oldop = PL_op;
2759 if (flags & G_DISCARD) {
2766 Zero(PL_op, 1, UNOP);
2767 EXTEND(PL_stack_sp, 1);
2768 *++PL_stack_sp = sv;
2770 if (!(flags & G_NOARGS))
2771 myop.op_flags = OPf_STACKED;
2772 myop.op_next = NULL;
2773 myop.op_type = OP_ENTEREVAL;
2774 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2775 (flags & G_ARRAY) ? OPf_WANT_LIST :
2777 if (flags & G_KEEPERR)
2778 myop.op_flags |= OPf_SPECIAL;
2780 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2781 * before a PUSHEVAL, which corrupts the stack after a croak */
2782 TAINT_PROPER("eval_sv()");
2788 CALL_BODY_EVAL((OP*)&myop);
2789 retval = PL_stack_sp - (PL_stack_base + oldmark);
2790 if (!(flags & G_KEEPERR))
2791 sv_setpvn(ERRSV,"",0);
2797 /* my_exit() was called */
2798 PL_curstash = PL_defstash;
2801 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2802 Perl_croak(aTHX_ "Callback called exit");
2807 PL_op = PL_restartop;
2811 PL_stack_sp = PL_stack_base + oldmark;
2812 if (flags & G_ARRAY)
2816 *++PL_stack_sp = &PL_sv_undef;
2822 if (flags & G_DISCARD) {
2823 PL_stack_sp = PL_stack_base + oldmark;
2833 =for apidoc p||eval_pv
2835 Tells Perl to C<eval> the given string and return an SV* result.
2841 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2845 SV* sv = newSVpv(p, 0);
2847 eval_sv(sv, G_SCALAR);
2854 if (croak_on_error && SvTRUE(ERRSV)) {
2855 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2861 /* Require a module. */
2864 =head1 Embedding Functions
2866 =for apidoc p||require_pv
2868 Tells Perl to C<require> the file named by the string argument. It is
2869 analogous to the Perl code C<eval "require '$file'">. It's even
2870 implemented that way; consider using load_module instead.
2875 Perl_require_pv(pTHX_ const char *pv)
2880 PUSHSTACKi(PERLSI_REQUIRE);
2882 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2883 eval_sv(sv_2mortal(sv), G_DISCARD);
2889 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2891 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2894 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2898 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2900 /* This message really ought to be max 23 lines.
2901 * Removed -h because the user already knows that option. Others? */
2903 static const char * const usage_msg[] = {
2904 "-0[octal] specify record separator (\\0, if no argument)",
2905 "-A[mod][=pattern] activate all/given assertions",
2906 "-a autosplit mode with -n or -p (splits $_ into @F)",
2907 "-C[number/list] enables the listed Unicode features",
2908 "-c check syntax only (runs BEGIN and CHECK blocks)",
2909 "-d[:debugger] run program under debugger",
2910 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2911 "-e program one line of program (several -e's allowed, omit programfile)",
2912 "-E program like -e, but enables all optional features",
2913 "-f don't do $sitelib/sitecustomize.pl at startup",
2914 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2915 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2916 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2917 "-l[octal] enable line ending processing, specifies line terminator",
2918 "-[mM][-]module execute \"use/no module...\" before executing program",
2919 "-n assume \"while (<>) { ... }\" loop around program",
2920 "-p assume loop like -n but print line also, like sed",
2921 "-P run program through C preprocessor before compilation",
2922 "-s enable rudimentary parsing for switches after programfile",
2923 "-S look for programfile using PATH environment variable",
2924 "-t enable tainting warnings",
2925 "-T enable tainting checks",
2926 "-u dump core after parsing program",
2927 "-U allow unsafe operations",
2928 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2929 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2930 "-w enable many useful warnings (RECOMMENDED)",
2931 "-W enable all warnings",
2932 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2933 "-X disable all warnings",
2937 const char * const *p = usage_msg;
2939 PerlIO_printf(PerlIO_stdout(),
2940 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2943 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2946 /* convert a string of -D options (or digits) into an int.
2947 * sets *s to point to the char after the options */
2951 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2953 static const char * const usage_msgd[] = {
2954 " Debugging flag values: (see also -d)",
2955 " p Tokenizing and parsing (with v, displays parse stack)",
2956 " s Stack snapshots (with v, displays all stacks)",
2957 " l Context (loop) stack processing",
2958 " t Trace execution",
2959 " o Method and overloading resolution",
2960 " c String/numeric conversions",
2961 " P Print profiling info, preprocessor command for -P, source file input state",
2962 " m Memory allocation",
2963 " f Format processing",
2964 " r Regular expression parsing and execution",
2965 " x Syntax tree dump",
2966 " u Tainting checks",
2967 " H Hash dump -- usurps values()",
2968 " X Scratchpad allocation",
2970 " S Thread synchronization",
2972 " R Include reference counts of dumped variables (eg when using -Ds)",
2973 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2974 " v Verbose: use in conjunction with other flags",
2976 " A Consistency checks on internal structures",
2977 " q quiet - currently only suppresses the 'EXECUTING' message",
2982 /* if adding extra options, remember to update DEBUG_MASK */
2983 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2985 for (; isALNUM(**s); (*s)++) {
2986 const char * const d = strchr(debopts,**s);
2988 i |= 1 << (d - debopts);
2989 else if (ckWARN_d(WARN_DEBUGGING))
2990 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2991 "invalid option -D%c, use -D'' to see choices\n", **s);
2994 else if (isDIGIT(**s)) {
2996 for (; isALNUM(**s); (*s)++) ;
2998 else if (givehelp) {
2999 const char *const *p = usage_msgd;
3000 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3003 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3004 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3005 "-Dp not implemented on this platform\n");
3011 /* This routine handles any switches that can be given during run */
3014 Perl_moreswitches(pTHX_ char *s)
3025 SvREFCNT_dec(PL_rs);
3026 if (s[1] == 'x' && s[2]) {
3027 const char *e = s+=2;
3033 flags = PERL_SCAN_SILENT_ILLDIGIT;
3034 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3035 if (s + numlen < e) {
3036 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3040 PL_rs = newSVpvs("");
3041 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3042 tmps = (U8*)SvPVX(PL_rs);
3043 uvchr_to_utf8(tmps, rschar);
3044 SvCUR_set(PL_rs, UNISKIP(rschar));
3049 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3050 if (rschar & ~((U8)~0))
3051 PL_rs = &PL_sv_undef;
3052 else if (!rschar && numlen >= 2)
3053 PL_rs = newSVpvs("");
3055 char ch = (char)rschar;
3056 PL_rs = newSVpvn(&ch, 1);
3059 sv_setsv(get_sv("/", TRUE), PL_rs);
3064 PL_unicode = parse_unicode_opts( (const char **)&s );
3065 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3071 while (*s && !isSPACE(*s)) ++s;
3072 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3083 forbid_setid('d', -1);
3086 /* -dt indicates to the debugger that threads will be used */
3087 if (*s == 't' && !isALNUM(s[1])) {
3089 my_setenv("PERL5DB_THREADED", "1");
3092 /* The following permits -d:Mod to accepts arguments following an =
3093 in the fashion that -MSome::Mod does. */
3094 if (*s == ':' || *s == '=') {
3096 SV * const sv = newSVpvs("use Devel::");
3098 /* We now allow -d:Module=Foo,Bar */
3099 while(isALNUM(*s) || *s==':') ++s;
3101 sv_catpv(sv, start);
3103 sv_catpvn(sv, start, s-start);
3104 /* Don't use NUL as q// delimiter here, this string goes in the
3106 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3109 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3112 PL_perldb = PERLDB_ALL;
3119 forbid_setid('D', -1);
3121 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3122 #else /* !DEBUGGING */
3123 if (ckWARN_d(WARN_DEBUGGING))
3124 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3125 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3126 for (s++; isALNUM(*s); s++) ;
3131 usage(PL_origargv[0]);
3134 Safefree(PL_inplace);
3135 #if defined(__CYGWIN__) /* do backup extension automagically */
3136 if (*(s+1) == '\0') {
3137 PL_inplace = savepvs(".bak");
3140 #endif /* __CYGWIN__ */
3142 const char * const start = ++s;
3143 while (*s && !isSPACE(*s))
3146 PL_inplace = savepvn(start, s - start);
3150 if (*s == '-') /* Additional switches on #! line. */
3154 case 'I': /* -I handled both here and in parse_body() */
3155 forbid_setid('I', -1);
3157 while (*s && isSPACE(*s))
3162 /* ignore trailing spaces (possibly followed by other switches) */
3164 for (e = p; *e && !isSPACE(*e); e++) ;
3168 } while (*p && *p != '-');
3169 e = savepvn(s, e-s);
3170 incpush(e, TRUE, TRUE, FALSE, FALSE);
3177 Perl_croak(aTHX_ "No directory specified for -I");
3183 SvREFCNT_dec(PL_ors_sv);
3189 PL_ors_sv = newSVpvs("\n");
3190 numlen = 3 + (*s == '0');
3191 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3195 if (RsPARA(PL_rs)) {
3196 PL_ors_sv = newSVpvs("\n\n");
3199 PL_ors_sv = newSVsv(PL_rs);
3204 forbid_setid('A', -1);
3207 char * const start = s;
3208 SV * const sv = newSVpvs("use assertions::activate");
3209 while(isALNUM(*s) || *s == ':') ++s;
3211 sv_catpvs(sv, "::");
3212 sv_catpvn(sv, start, s-start);
3215 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0);
3218 else if (*s != '\0') {
3219 Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start);
3221 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3225 forbid_setid('M', -1); /* XXX ? */
3228 forbid_setid('m', -1); /* XXX ? */
3232 const char *use = "use ";
3233 /* -M-foo == 'no foo' */
3234 /* Leading space on " no " is deliberate, to make both
3235 possibilities the same length. */
3236 if (*s == '-') { use = " no "; ++s; }
3237 sv = newSVpvn(use,4);
3239 /* We allow -M'Module qw(Foo Bar)' */
3240 while(isALNUM(*s) || *s==':') ++s;
3242 sv_catpv(sv, start);
3243 if (*(start-1) == 'm') {
3245 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3246 sv_catpvs( sv, " ()");
3250 Perl_croak(aTHX_ "Module name required with -%c option",
3252 sv_catpvn(sv, start, s-start);
3253 sv_catpvs(sv, " split(/,/,q");
3254 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3256 sv_catpvs(sv, "\0)");
3259 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3262 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3273 forbid_setid('s', -1);
3274 PL_doswitches = TRUE;
3288 #ifdef MACOS_TRADITIONAL
3289 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3291 PL_do_undump = TRUE;
3299 if (!sv_derived_from(PL_patchlevel, "version"))
3300 upg_version(PL_patchlevel, TRUE);
3302 PerlIO_printf(PerlIO_stdout(),
3303 Perl_form(aTHX_ "\nThis is perl, %"SVf
3304 #ifdef PERL_PATCHNUM
3305 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3308 SVfARG(vstringify(PL_patchlevel)),
3311 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3312 PerlIO_printf(PerlIO_stdout(),
3313 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3314 SVfARG(vstringify(PL_patchlevel))));
3315 PerlIO_printf(PerlIO_stdout(),
3316 Perl_form(aTHX_ " built under %s at %s %s\n",
3317 OSNAME, __DATE__, __TIME__));
3318 PerlIO_printf(PerlIO_stdout(),
3319 Perl_form(aTHX_ " OS Specific Release: %s\n",
3323 #if defined(LOCAL_PATCH_COUNT)
3324 if (LOCAL_PATCH_COUNT > 0)
3325 PerlIO_printf(PerlIO_stdout(),
3326 "\n(with %d registered patch%s, "
3327 "see perl -V for more detail)",
3329 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3332 PerlIO_printf(PerlIO_stdout(),
3333 "\n\nCopyright 1987-2007, Larry Wall\n");
3334 #ifdef MACOS_TRADITIONAL
3335 PerlIO_printf(PerlIO_stdout(),
3336 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3337 "maintained by Chris Nandor\n");
3340 PerlIO_printf(PerlIO_stdout(),
3341 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3344 PerlIO_printf(PerlIO_stdout(),
3345 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3346 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3349 PerlIO_printf(PerlIO_stdout(),
3350 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3351 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3354 PerlIO_printf(PerlIO_stdout(),
3355 "atariST series port, ++jrb bammi@cadence.com\n");
3358 PerlIO_printf(PerlIO_stdout(),
3359 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3362 PerlIO_printf(PerlIO_stdout(),
3363 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3366 PerlIO_printf(PerlIO_stdout(),
3367 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3370 PerlIO_printf(PerlIO_stdout(),
3371 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3374 PerlIO_printf(PerlIO_stdout(),
3375 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3378 PerlIO_printf(PerlIO_stdout(),
3379 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3382 PerlIO_printf(PerlIO_stdout(),
3383 "MiNT port by Guido Flohr, 1997-1999\n");
3386 PerlIO_printf(PerlIO_stdout(),
3387 "EPOC port by Olaf Flebbe, 1999-2002\n");
3390 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3391 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3394 #ifdef __SYMBIAN32__
3395 PerlIO_printf(PerlIO_stdout(),
3396 "Symbian port by Nokia, 2004-2005\n");
3398 #ifdef BINARY_BUILD_NOTICE
3399 BINARY_BUILD_NOTICE;
3401 PerlIO_printf(PerlIO_stdout(),
3403 Perl may be copied only under the terms of either the Artistic License or the\n\
3404 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3405 Complete documentation for Perl, including FAQ lists, should be found on\n\
3406 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3407 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3410 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3411 PL_dowarn |= G_WARN_ON;
3416 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3417 if (!specialWARN(PL_compiling.cop_warnings))
3418 PerlMemShared_free(PL_compiling.cop_warnings);
3419 PL_compiling.cop_warnings = pWARN_ALL ;
3423 PL_dowarn = G_WARN_ALL_OFF;
3424 if (!specialWARN(PL_compiling.cop_warnings))
3425 PerlMemShared_free(PL_compiling.cop_warnings);
3426 PL_compiling.cop_warnings = pWARN_NONE ;
3431 if (s[1] == '-') /* Additional switches on #! line. */
3436 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3442 #ifdef ALTERNATE_SHEBANG
3443 case 'S': /* OS/2 needs -S on "extproc" line. */
3451 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3456 /* compliments of Tom Christiansen */
3458 /* unexec() can be found in the Gnu emacs distribution */
3459 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3462 Perl_my_unexec(pTHX)
3464 PERL_UNUSED_CONTEXT;
3466 SV * prog = newSVpv(BIN_EXP, 0);
3467 SV * file = newSVpv(PL_origfilename, 0);
3471 sv_catpvs(prog, "/perl");
3472 sv_catpvs(file, ".perldump");
3474 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3475 /* unexec prints msg to stderr in case of failure */
3476 PerlProc_exit(status);
3479 # include <lib$routines.h>
3480 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3481 # elif defined(WIN32) || defined(__CYGWIN__)
3482 Perl_croak(aTHX_ "dump is not supported");
3484 ABORT(); /* for use with undump */
3489 /* initialize curinterp */
3495 # define PERLVAR(var,type)
3496 # define PERLVARA(var,n,type)
3497 # if defined(PERL_IMPLICIT_CONTEXT)
3498 # define PERLVARI(var,type,init) aTHX->var = init;
3499 # define PERLVARIC(var,type,init) aTHX->var = init;
3501 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3502 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3504 # include "intrpvar.h"
3505 # include "thrdvar.h"
3511 # define PERLVAR(var,type)
3512 # define PERLVARA(var,n,type)
3513 # define PERLVARI(var,type,init) PL_##var = init;
3514 # define PERLVARIC(var,type,init) PL_##var = init;
3515 # include "intrpvar.h"
3516 # include "thrdvar.h"
3523 /* As these are inside a structure, PERLVARI isn't capable of initialising
3525 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3526 PL_reg_poscache = PL_reg_starttry = NULL;
3530 S_init_main_stash(pTHX)
3535 PL_curstash = PL_defstash = newHV();
3536 /* We know that the string "main" will be in the global shared string
3537 table, so it's a small saving to use it rather than allocate another
3539 PL_curstname = newSVpvs_share("main");
3540 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3541 /* If we hadn't caused another reference to "main" to be in the shared
3542 string table above, then it would be worth reordering these two,
3543 because otherwise all we do is delete "main" from it as a consequence
3544 of the SvREFCNT_dec, only to add it again with hv_name_set */
3545 SvREFCNT_dec(GvHV(gv));
3546 hv_name_set(PL_defstash, "main", 4, 0);
3547 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3549 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3551 SvREFCNT_inc_simple(PL_incgv); /* Don't allow it to be freed */
3552 GvMULTI_on(PL_incgv);
3553 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3554 GvMULTI_on(PL_hintgv);
3555 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3556 SvREFCNT_inc_simple(PL_defgv);
3557 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3558 SvREFCNT_inc_simple(PL_errgv);
3559 GvMULTI_on(PL_errgv);
3560 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3561 GvMULTI_on(PL_replgv);
3562 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3563 #ifdef PERL_DONT_CREATE_GVSV
3566 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3567 sv_setpvn(ERRSV, "", 0);
3568 PL_curstash = PL_defstash;
3569 CopSTASH_set(&PL_compiling, PL_defstash);
3570 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3571 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3573 /* We must init $/ before switches are processed. */
3574 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3578 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3584 const char *cpp_discard_flag;
3593 PL_origfilename = savepvs("-e");
3596 /* if find_script() returns, it returns a malloc()-ed value */
3597 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3599 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3600 const char *s = scriptname + 8;
3606 * Tell apart "normal" usage of fdscript, e.g.
3607 * with bash on FreeBSD:
3608 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3609 * from usage in suidperl.
3610 * Does any "normal" usage leave garbage after the number???
3611 * Is it a mistake to use a similar /dev/fd/ construct for
3616 * Be supersafe and do some sanity-checks.
3617 * Still, can we be sure we got the right thing?
3620 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3623 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3625 scriptname = savepv(s + 1);
3626 Safefree(PL_origfilename);
3627 PL_origfilename = (char *)scriptname;
3632 CopFILE_free(PL_curcop);
3633 CopFILE_set(PL_curcop, PL_origfilename);
3634 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3635 scriptname = (char *)"";
3636 if (fdscript >= 0) {
3637 PL_rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3638 # if defined(HAS_FCNTL) && defined(F_SETFD)
3640 /* ensure close-on-exec */
3641 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3646 Perl_croak(aTHX_ "sperl needs fd script\n"
3647 "You should not call sperl directly; do you need to "
3648 "change a #! line\nfrom sperl to perl?\n");
3651 * Do not open (or do other fancy stuff) while setuid.
3652 * Perl does the open, and hands script to suidperl on a fd;
3653 * suidperl only does some checks, sets up UIDs and re-execs
3654 * perl with that fd as it has always done.
3657 if (*suidscript != 1) {
3658 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3661 else if (PL_preprocess) {
3662 const char * const cpp_cfg = CPPSTDIN;
3663 SV * const cpp = newSVpvs("");
3664 SV * const cmd = newSV(0);
3666 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3667 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3668 if (strEQ(cpp_cfg, "cppstdin"))
3669 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3670 sv_catpv(cpp, cpp_cfg);
3673 sv_catpvs(sv, "-I");
3674 sv_catpv(sv,PRIVLIB_EXP);
3677 DEBUG_P(PerlIO_printf(Perl_debug_log,
3678 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3679 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3682 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3689 cpp_discard_flag = "";
3691 cpp_discard_flag = "-C";
3695 perl = os2_execname(aTHX);
3697 perl = PL_origargv[0];
3701 /* This strips off Perl comments which might interfere with
3702 the C pre-processor, including #!. #line directives are
3703 deliberately stripped to avoid confusion with Perl's version
3704 of #line. FWP played some golf with it so it will fit
3705 into VMS's 255 character buffer.
3708 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3710 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3712 Perl_sv_setpvf(aTHX_ cmd, "\
3713 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3714 perl, quote, code, quote, scriptname, SVfARG(cpp),
3715 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3717 PL_doextract = FALSE;
3719 DEBUG_P(PerlIO_printf(Perl_debug_log,
3720 "PL_preprocess: cmd=\"%s\"\n",
3723 PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3727 else if (!*scriptname) {
3728 forbid_setid(0, *suidscript);
3729 PL_rsfp = PerlIO_stdin();
3732 PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3733 # if defined(HAS_FCNTL) && defined(F_SETFD)
3735 /* ensure close-on-exec */
3736 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1);
3739 #endif /* IAMSUID */
3741 /* PSz 16 Sep 03 Keep neat error message */
3743 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3745 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3746 CopFILE(PL_curcop), Strerror(errno));
3752 * I_SYSSTATVFS HAS_FSTATVFS
3754 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3755 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3756 * here so that metaconfig picks them up. */
3760 S_fd_on_nosuid_fs(pTHX_ int fd)
3763 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3764 * but is needed also on machines without setreuid.
3765 * Seems safe enough to run as root.
3767 int check_okay = 0; /* able to do all the required sys/libcalls */
3768 int on_nosuid = 0; /* the fd is on a nosuid fs */
3770 * Need to check noexec also: nosuid might not be set, the average
3771 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3773 int on_noexec = 0; /* the fd is on a noexec fs */
3776 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3777 * fstatvfs() is UNIX98.
3778 * fstatfs() is 4.3 BSD.
3779 * ustat()+getmnt() is pre-4.3 BSD.
3780 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3781 * an irrelevant filesystem while trying to reach the right one.
3784 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3786 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3787 defined(HAS_FSTATVFS)
3788 # define FD_ON_NOSUID_CHECK_OKAY
3789 struct statvfs stfs;
3791 check_okay = fstatvfs(fd, &stfs) == 0;
3792 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3794 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3795 on platforms where it is present. */
3796 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3798 # endif /* fstatvfs */
3800 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3801 defined(PERL_MOUNT_NOSUID) && \
3802 defined(PERL_MOUNT_NOEXEC) && \
3803 defined(HAS_FSTATFS) && \
3804 defined(HAS_STRUCT_STATFS) && \
3805 defined(HAS_STRUCT_STATFS_F_FLAGS)
3806 # define FD_ON_NOSUID_CHECK_OKAY
3809 check_okay = fstatfs(fd, &stfs) == 0;
3810 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3811 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3812 # endif /* fstatfs */
3814 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3815 defined(PERL_MOUNT_NOSUID) && \
3816 defined(PERL_MOUNT_NOEXEC) && \
3817 defined(HAS_FSTAT) && \
3818 defined(HAS_USTAT) && \
3819 defined(HAS_GETMNT) && \
3820 defined(HAS_STRUCT_FS_DATA) && \
3822 # define FD_ON_NOSUID_CHECK_OKAY
3825 if (fstat(fd, &fdst) == 0) {
3827 if (ustat(fdst.st_dev, &us) == 0) {
3829 /* NOSTAT_ONE here because we're not examining fields which
3830 * vary between that case and STAT_ONE. */
3831 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3832 size_t cmplen = sizeof(us.f_fname);
3833 if (sizeof(fsd.fd_req.path) < cmplen)
3834 cmplen = sizeof(fsd.fd_req.path);
3835 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3836 fdst.st_dev == fsd.fd_req.dev) {
3838 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3839 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3844 # endif /* fstat+ustat+getmnt */
3846 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3847 defined(HAS_GETMNTENT) && \
3848 defined(HAS_HASMNTOPT) && \
3849 defined(MNTOPT_NOSUID) && \
3850 defined(MNTOPT_NOEXEC)
3851 # define FD_ON_NOSUID_CHECK_OKAY
3852 FILE *mtab = fopen("/etc/mtab", "r");
3853 struct mntent *entry;
3856 if (mtab && (fstat(fd, &stb) == 0)) {
3857 while (entry = getmntent(mtab)) {
3858 if (stat(entry->mnt_dir, &fsb) == 0
3859 && fsb.st_dev == stb.st_dev)
3861 /* found the filesystem */
3863 if (hasmntopt(entry, MNTOPT_NOSUID))
3865 if (hasmntopt(entry, MNTOPT_NOEXEC))
3868 } /* A single fs may well fail its stat(). */
3873 # endif /* getmntent+hasmntopt */
3876 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3878 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3880 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3881 return ((!check_okay) || on_nosuid || on_noexec);
3883 #endif /* IAMSUID */
3886 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3887 int fdscript, int suidscript)
3892 #endif /* IAMSUID */
3894 /* do we need to emulate setuid on scripts? */
3896 /* This code is for those BSD systems that have setuid #! scripts disabled
3897 * in the kernel because of a security problem. Merely defining DOSUID
3898 * in perl will not fix that problem, but if you have disabled setuid
3899 * scripts in the kernel, this will attempt to emulate setuid and setgid
3900 * on scripts that have those now-otherwise-useless bits set. The setuid
3901 * root version must be called suidperl or sperlN.NNN. If regular perl
3902 * discovers that it has opened a setuid script, it calls suidperl with
3903 * the same argv that it had. If suidperl finds that the script it has
3904 * just opened is NOT setuid root, it sets the effective uid back to the
3905 * uid. We don't just make perl setuid root because that loses the
3906 * effective uid we had before invoking perl, if it was different from the
3909 * Description/comments above do not match current workings:
3910 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3911 * suidperl called with script open and name changed to /dev/fd/N/X;
3912 * suidperl croaks if script is not setuid;
3913 * making perl setuid would be a huge security risk (and yes, that
3914 * would lose any euid we might have had).
3916 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3917 * be defined in suidperl only. suidperl must be setuid root. The
3918 * Configure script will set this up for you if you want it.
3924 if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3925 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3926 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3928 const char *linestr;
3932 if (fdscript < 0 || suidscript != 1)
3933 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3935 * Since the script is opened by perl, not suidperl, some of these
3936 * checks are superfluous. Leaving them in probably does not lower
3940 * Do checks even for systems with no HAS_SETREUID.
3941 * We used to swap, then re-swap UIDs with
3943 if (setreuid(PL_euid,PL_uid) < 0
3944 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3945 Perl_croak(aTHX_ "Can't swap uid and euid");
3948 if (setreuid(PL_uid,PL_euid) < 0
3949 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3950 Perl_croak(aTHX_ "Can't reswap uid and euid");
3954 /* On this access check to make sure the directories are readable,
3955 * there is actually a small window that the user could use to make
3956 * filename point to an accessible directory. So there is a faint
3957 * chance that someone could execute a setuid script down in a
3958 * non-accessible directory. I don't know what to do about that.
3959 * But I don't think it's too important. The manual lies when
3960 * it says access() is useful in setuid programs.
3962 * So, access() is pretty useless... but not harmful... do anyway.
3964 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3965 Perl_croak(aTHX_ "Can't access() script\n");
3968 /* If we can swap euid and uid, then we can determine access rights
3969 * with a simple stat of the file, and then compare device and
3970 * inode to make sure we did stat() on the same file we opened.
3971 * Then we just have to make sure he or she can execute it.
3974 * As the script is opened by perl, not suidperl, we do not need to
3975 * care much about access rights.
3977 * The 'script changed' check is needed, or we can get lied to
3978 * about $0 with e.g.
3979 * suidperl /dev/fd/4//bin/x 4<setuidscript
3980 * Without HAS_SETREUID, is it safe to stat() as root?
3982 * Are there any operating systems that pass /dev/fd/xxx for setuid
3983 * scripts, as suggested/described in perlsec(1)? Surely they do not
3984 * pass the script name as we do, so the "script changed" test would
3985 * fail for them... but we never get here with
3986 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3988 * This is one place where we must "lie" about return status: not
3989 * say if the stat() failed. We are doing this as root, and could
3990 * be tricked into reporting existence or not of files that the
3991 * "plain" user cannot even see.
3995 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3996 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3997 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3998 Perl_croak(aTHX_ "Setuid script changed\n");
4002 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
4003 Perl_croak(aTHX_ "Real UID cannot exec script\n");
4006 * We used to do this check as the "plain" user (after swapping
4007 * UIDs). But the check for nosuid and noexec filesystem is needed,
4008 * and should be done even without HAS_SETREUID. (Maybe those
4009 * operating systems do not have such mount options anyway...)
4010 * Seems safe enough to do as root.
4012 #if !defined(NO_NOSUID_CHECK)
4013 if (fd_on_nosuid_fs(PerlIO_fileno(PL_rsfp))) {
4014 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
4017 #endif /* IAMSUID */
4019 if (!S_ISREG(PL_statbuf.st_mode)) {
4020 Perl_croak(aTHX_ "Setuid script not plain file\n");
4022 if (PL_statbuf.st_mode & S_IWOTH)
4023 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4024 PL_doswitches = FALSE; /* -s is insecure in suid */
4025 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4026 CopLINE_inc(PL_curcop);
4027 if (sv_gets(PL_linestr, PL_rsfp, 0) == NULL)
4028 Perl_croak(aTHX_ "No #! line");
4029 linestr = SvPV_nolen_const(PL_linestr);
4030 /* required even on Sys V */
4031 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4032 Perl_croak(aTHX_ "No #! line");
4036 /* Sanity check on line length */
4037 s_end = s + strlen(s);
4038 if (s_end == s || (s_end - s) > 4000)
4039 Perl_croak(aTHX_ "Very long #! line");
4040 /* Allow more than a single space after #! */
4041 while (isSPACE(*s)) s++;
4042 /* Sanity check on buffer end */
4043 while ((*s) && !isSPACE(*s)) s++;
4044 for (s2 = s; (s2 > linestr &&
4045 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4046 || s2[-1] == '-')); s2--) ;
4047 /* Sanity check on buffer start */
4048 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4049 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4050 Perl_croak(aTHX_ "Not a perl script");
4051 while (*s == ' ' || *s == '\t') s++;
4053 * #! arg must be what we saw above. They can invoke it by
4054 * mentioning suidperl explicitly, but they may not add any strange
4055 * arguments beyond what #! says if they do invoke suidperl that way.
4058 * The way validarg was set up, we rely on the kernel to start
4059 * scripts with argv[1] set to contain all #! line switches (the
4063 * Check that we got all the arguments listed in the #! line (not
4064 * just that there are no extraneous arguments). Might not matter
4065 * much, as switches from #! line seem to be acted upon (also), and
4066 * so may be checked and trapped in perl. But, security checks must
4067 * be done in suidperl and not deferred to perl. Note that suidperl
4068 * does not get around to parsing (and checking) the switches on
4069 * the #! line (but execs perl sooner).
4070 * Allow (require) a trailing newline (which may be of two
4071 * characters on some architectures?) (but no other trailing
4074 len = strlen(validarg);
4075 if (strEQ(validarg," PHOOEY ") ||
4076 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4077 !((s_end - s) == len+1
4078 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4079 Perl_croak(aTHX_ "Args must match #! line");
4083 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4084 PL_euid == PL_statbuf.st_uid)
4086 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4087 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4088 #endif /* IAMSUID */
4091 PL_euid) { /* oops, we're not the setuid root perl */
4093 * When root runs a setuid script, we do not go through the same
4094 * steps of execing sperl and then perl with fd scripts, but
4095 * simply set up UIDs within the same perl invocation; so do
4096 * not have the same checks (on options, whatever) that we have
4097 * for plain users. No problem really: would have to be a script
4098 * that does not actually work for plain users; and if root is
4099 * foolish and can be persuaded to run such an unsafe script, he
4100 * might run also non-setuid ones, and deserves what he gets.
4102 * Or, we might drop the PL_euid check above (and rely just on
4103 * fdscript to avoid loops), and do the execs
4109 * Pass fd script to suidperl.
4110 * Exec suidperl, substituting fd script for scriptname.
4111 * Pass script name as "subdir" of fd, which perl will grok;
4112 * in fact will use that to distinguish this from "normal"
4113 * usage, see comments above.
4115 PerlIO_rewind(PL_rsfp);
4116 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4117 /* PSz 27 Feb 04 Sanity checks on scriptname */
4118 if ((!scriptname) || (!*scriptname) ) {
4119 Perl_croak(aTHX_ "No setuid script name\n");
4121 if (*scriptname == '-') {
4122 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4123 /* Or we might confuse it with an option when replacing
4124 * name in argument list, below (though we do pointer, not
4125 * string, comparisons).
4128 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4129 if (!PL_origargv[which]) {
4130 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4132 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4133 PerlIO_fileno(PL_rsfp), PL_origargv[which]));
4134 #if defined(HAS_FCNTL) && defined(F_SETFD)
4135 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4138 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4139 (int)PERL_REVISION, (int)PERL_VERSION,
4140 (int)PERL_SUBVERSION), PL_origargv);
4142 #endif /* IAMSUID */
4143 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4146 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4148 * This seems back to front: we try HAS_SETEGID first; if not available
4149 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4150 * in the sense that we only want to set EGID; but are there any machines
4151 * with either of the latter, but not the former? Same with UID, later.
4154 (void)setegid(PL_statbuf.st_gid);
4157 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4159 #ifdef HAS_SETRESGID
4160 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4162 PerlProc_setgid(PL_statbuf.st_gid);
4166 if (PerlProc_getegid() != PL_statbuf.st_gid)
4167 Perl_croak(aTHX_ "Can't do setegid!\n");
4169 if (PL_statbuf.st_mode & S_ISUID) {
4170 if (PL_statbuf.st_uid != PL_euid)
4172 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4175 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4177 #ifdef HAS_SETRESUID
4178 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4180 PerlProc_setuid(PL_statbuf.st_uid);
4184 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4185 Perl_croak(aTHX_ "Can't do seteuid!\n");
4187 else if (PL_uid) { /* oops, mustn't run as root */
4189 (void)seteuid((Uid_t)PL_uid);
4192 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4194 #ifdef HAS_SETRESUID
4195 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4197 PerlProc_setuid((Uid_t)PL_uid);
4201 if (PerlProc_geteuid() != PL_uid)
4202 Perl_croak(aTHX_ "Can't do seteuid!\n");
4205 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4206 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4209 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4210 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4211 else if (fdscript < 0 || suidscript != 1)
4212 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4213 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4215 /* PSz 16 Sep 03 Keep neat error message */
4216 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4219 /* We absolutely must clear out any saved ids here, so we */
4220 /* exec the real perl, substituting fd script for scriptname. */
4221 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4223 * It might be thought that using setresgid and/or setresuid (changed to
4224 * set the saved IDs) above might obviate the need to exec, and we could
4225 * go on to "do the perl thing".
4227 * Is there such a thing as "saved GID", and is that set for setuid (but
4228 * not setgid) execution like suidperl? Without exec, it would not be
4229 * cleared for setuid (but not setgid) scripts (or might need a dummy
4232 * We need suidperl to do the exact same argument checking that perl
4233 * does. Thus it cannot be very small; while it could be significantly
4234 * smaller, it is safer (simpler?) to make it essentially the same
4235 * binary as perl (but they are not identical). - Maybe could defer that
4236 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4237 * but prefer to do thorough checks in suidperl itself. Such deferral
4238 * would make suidperl security rely on perl, a design no-no.
4240 * Setuid things should be short and simple, thus easy to understand and
4241 * verify. They should do their "own thing", without influence by
4242 * attackers. It may help if their internal execution flow is fixed,
4243 * regardless of platform: it may be best to exec anyway.
4245 * Suidperl should at least be conceptually simple: a wrapper only,
4246 * never to do any real perl. Maybe we should put
4248 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4250 * into the perly bits.
4252 PerlIO_rewind(PL_rsfp);
4253 PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */
4255 * Keep original arguments: suidperl already has fd script.
4257 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4258 /* if (!PL_origargv[which]) { */
4259 /* errno = EPERM; */
4260 /* Perl_croak(aTHX_ "Permission denied\n"); */
4262 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4263 /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */
4264 #if defined(HAS_FCNTL) && defined(F_SETFD)
4265 fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */
4268 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4269 (int)PERL_REVISION, (int)PERL_VERSION,
4270 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4272 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4273 #endif /* IAMSUID */
4275 PERL_UNUSED_ARG(fdscript);
4276 PERL_UNUSED_ARG(suidscript);
4277 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4278 #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4279 PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4280 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4282 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4285 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4286 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4287 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4288 /* not set-id, must be wrapped */
4291 PERL_UNUSED_ARG(validarg);
4292 PERL_UNUSED_ARG(scriptname);
4296 S_find_beginning(pTHX)
4300 register const char *s2;
4301 #ifdef MACOS_TRADITIONAL
4305 /* skip forward in input to the real script? */
4307 #ifdef MACOS_TRADITIONAL
4308 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4310 while (PL_doextract || gMacPerl_AlwaysExtract) {
4311 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL) {
4312 if (!gMacPerl_AlwaysExtract)
4313 Perl_croak(aTHX_ "No Perl script found in input\n");
4315 if (PL_doextract) /* require explicit override ? */
4316 if (!OverrideExtract(PL_origfilename))
4317 Perl_croak(aTHX_ "User aborted script\n");
4319 PL_doextract = FALSE;
4321 /* Pater peccavi, file does not have #! */
4322 PerlIO_rewind(PL_rsfp);
4327 while (PL_doextract) {
4328 if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == NULL)
4329 Perl_croak(aTHX_ "No Perl script found in input\n");
4332 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4333 PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */
4334 PL_doextract = FALSE;
4335 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4337 while (*s == ' ' || *s == '\t') s++;
4339 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4340 || s2[-1] == '_') s2--;
4341 if (strnEQ(s2-4,"perl",4))
4342 while ((s = moreswitches(s)))
4345 #ifdef MACOS_TRADITIONAL
4346 /* We are always searching for the #!perl line in MacPerl,
4347 * so if we find it, still keep the line count correct
4348 * by counting lines we already skipped over
4350 for (; maclines > 0 ; maclines--)
4351 PerlIO_ungetc(PL_rsfp, '\n');
4355 /* gMacPerl_AlwaysExtract is false in MPW tool */
4356 } else if (gMacPerl_AlwaysExtract) {
4368 PL_uid = PerlProc_getuid();
4369 PL_euid = PerlProc_geteuid();
4370 PL_gid = PerlProc_getgid();
4371 PL_egid = PerlProc_getegid();
4373 PL_uid |= PL_gid << 16;
4374 PL_euid |= PL_egid << 16;
4376 /* Should not happen: */
4377 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4378 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4381 * Should go by suidscript, not uid!=euid: why disallow
4382 * system("ls") in scripts run from setuid things?
4383 * Or, is this run before we check arguments and set suidscript?
4384 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4385 * (We never have suidscript, can we be sure to have fdscript?)
4386 * Or must then go by UID checks? See comments in forbid_setid also.
4390 /* This is used very early in the lifetime of the program,
4391 * before even the options are parsed, so PL_tainting has
4392 * not been initialized properly. */
4394 Perl_doing_taint(int argc, char *argv[], char *envp[])
4396 #ifndef PERL_IMPLICIT_SYS
4397 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4398 * before we have an interpreter-- and the whole point of this
4399 * function is to be called at such an early stage. If you are on
4400 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4401 * "tainted because running with altered effective ids', you'll
4402 * have to add your own checks somewhere in here. The two most
4403 * known samples of 'implicitness' are Win32 and NetWare, neither
4404 * of which has much of concept of 'uids'. */
4405 int uid = PerlProc_getuid();
4406 int euid = PerlProc_geteuid();
4407 int gid = PerlProc_getgid();
4408 int egid = PerlProc_getegid();
4415 if (uid && (euid != uid || egid != gid))
4417 #endif /* !PERL_IMPLICIT_SYS */
4418 /* This is a really primitive check; environment gets ignored only
4419 * if -T are the first chars together; otherwise one gets
4420 * "Too late" message. */
4421 if ( argc > 1 && argv[1][0] == '-'
4422 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4427 /* Passing the flag as a single char rather than a string is a slight space
4428 optimisation. The only message that isn't /^-.$/ is
4429 "program input from stdin", which is substituted in place of '\0', which
4430 could never be a command line flag. */
4432 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4435 char string[3] = "-x";
4436 const char *message = "program input from stdin";
4443 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4444 if (PL_euid != PL_uid)
4445 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4446 if (PL_egid != PL_gid)
4447 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4448 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4450 * Checks for UID/GID above "wrong": why disallow
4451 * perl -e 'print "Hello\n"'
4452 * from within setuid things?? Simply drop them: replaced by
4453 * fdscript/suidscript and #ifdef IAMSUID checks below.
4455 * This may be too late for command-line switches. Will catch those on
4456 * the #! line, after finding the script name and setting up
4457 * fdscript/suidscript. Note that suidperl does not get around to
4458 * parsing (and checking) the switches on the #! line, but checks that
4459 * the two sets are identical.
4461 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4462 * instead, or would that be "too late"? (We never have suidscript, can
4463 * we be sure to have fdscript?)
4465 * Catch things with suidscript (in descendant of suidperl), even with
4466 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4467 * below; but I am paranoid.
4469 * Also see comments about root running a setuid script, elsewhere.
4471 if (suidscript >= 0)
4472 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4474 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4475 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4476 #endif /* IAMSUID */
4480 Perl_init_debugger(pTHX)
4483 HV * const ostash = PL_curstash;
4485 PL_curstash = PL_debstash;
4486 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4488 AvREAL_off(PL_dbargs);
4489 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4490 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4491 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4492 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4493 sv_setiv(PL_DBsingle, 0);
4494 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4495 sv_setiv(PL_DBtrace, 0);
4496 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4497 sv_setiv(PL_DBsignal, 0);
4498 PL_DBassertion = GvSV((gv_fetchpvs("DB::assertion", GV_ADDMULTI, SVt_PV)));
4499 sv_setiv(PL_DBassertion, 0);
4500 PL_curstash = ostash;
4503 #ifndef STRESS_REALLOC
4504 #define REASONABLE(size) (size)
4506 #define REASONABLE(size) (1) /* unreasonable */
4510 Perl_init_stacks(pTHX)
4513 /* start with 128-item stack and 8K cxstack */
4514 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4515 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4516 PL_curstackinfo->si_type = PERLSI_MAIN;
4517 PL_curstack = PL_curstackinfo->si_stack;
4518 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4520 PL_stack_base = AvARRAY(PL_curstack);
4521 PL_stack_sp = PL_stack_base;
4522 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4524 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4527 PL_tmps_max = REASONABLE(128);
4529 Newx(PL_markstack,REASONABLE(32),I32);
4530 PL_markstack_ptr = PL_markstack;
4531 PL_markstack_max = PL_markstack + REASONABLE(32);
4535 Newx(PL_scopestack,REASONABLE(32),I32);
4536 PL_scopestack_ix = 0;
4537 PL_scopestack_max = REASONABLE(32);
4539 Newx(PL_savestack,REASONABLE(128),ANY);
4540 PL_savestack_ix = 0;
4541 PL_savestack_max = REASONABLE(128);
4550 while (PL_curstackinfo->si_next)
4551 PL_curstackinfo = PL_curstackinfo->si_next;
4552 while (PL_curstackinfo) {
4553 PERL_SI *p = PL_curstackinfo->si_prev;
4554 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4555 Safefree(PL_curstackinfo->si_cxstack);
4556 Safefree(PL_curstackinfo);
4557 PL_curstackinfo = p;
4559 Safefree(PL_tmps_stack);
4560 Safefree(PL_markstack);
4561 Safefree(PL_scopestack);
4562 Safefree(PL_savestack);
4572 lex_start(PL_linestr);
4574 PL_subname = newSVpvs("main");
4578 S_init_predump_symbols(pTHX)
4584 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4585 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4586 GvMULTI_on(PL_stdingv);
4587 io = GvIOp(PL_stdingv);
4588 IoTYPE(io) = IoTYPE_RDONLY;
4589 IoIFP(io) = PerlIO_stdin();
4590 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4592 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4594 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4597 IoTYPE(io) = IoTYPE_WRONLY;
4598 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4600 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4602 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4604 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4605 GvMULTI_on(PL_stderrgv);
4606 io = GvIOp(PL_stderrgv);
4607 IoTYPE(io) = IoTYPE_WRONLY;
4608 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4609 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4611 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4613 PL_statname = newSV(0); /* last filename we did stat on */
4615 Safefree(PL_osname);
4616 PL_osname = savepv(OSNAME);
4620 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4623 argc--,argv++; /* skip name of script */
4624 if (PL_doswitches) {
4625 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4629 if (argv[0][1] == '-' && !argv[0][2]) {
4633 if ((s = strchr(argv[0], '='))) {
4634 const char *const start_name = argv[0] + 1;
4635 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4636 TRUE, SVt_PV)), s + 1);
4639 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4642 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4643 GvMULTI_on(PL_argvgv);
4644 (void)gv_AVadd(PL_argvgv);
4645 av_clear(GvAVn(PL_argvgv));
4646 for (; argc > 0; argc--,argv++) {
4647 SV * const sv = newSVpv(argv[0],0);
4648 av_push(GvAVn(PL_argvgv),sv);
4649 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4650 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4653 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4654 (void)sv_utf8_decode(sv);
4660 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4665 PL_toptarget = newSV_type(SVt_PVFM);
4666 sv_setpvn(PL_toptarget, "", 0);
4667 PL_bodytarget = newSV_type(SVt_PVFM);
4668 sv_setpvn(PL_bodytarget, "", 0);
4669 PL_formtarget = PL_bodytarget;
4673 init_argv_symbols(argc,argv);
4675 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4676 #ifdef MACOS_TRADITIONAL
4677 /* $0 is not majick on a Mac */
4678 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4680 sv_setpv(GvSV(tmpgv),PL_origfilename);
4681 magicname("0", "0", 1);
4684 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4686 bool env_is_not_environ;
4687 GvMULTI_on(PL_envgv);
4688 hv = GvHVn(PL_envgv);
4689 hv_magic(hv, NULL, PERL_MAGIC_env);
4691 #ifdef USE_ENVIRON_ARRAY
4692 /* Note that if the supplied env parameter is actually a copy
4693 of the global environ then it may now point to free'd memory
4694 if the environment has been modified since. To avoid this
4695 problem we treat env==NULL as meaning 'use the default'
4699 env_is_not_environ = env != environ;
4700 if (env_is_not_environ
4701 # ifdef USE_ITHREADS
4702 && PL_curinterp == aTHX
4711 for (; *env; env++) {
4712 if (!(s = strchr(*env,'=')) || s == *env)
4714 #if defined(MSDOS) && !defined(DJGPP)
4719 sv = newSVpv(s+1, 0);
4720 (void)hv_store(hv, *env, s - *env, sv, 0);
4721 if (env_is_not_environ)
4725 #endif /* USE_ENVIRON_ARRAY */
4726 #endif /* !PERL_MICRO */
4729 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4730 SvREADONLY_off(GvSV(tmpgv));
4731 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4732 SvREADONLY_on(GvSV(tmpgv));
4734 #ifdef THREADS_HAVE_PIDS
4735 PL_ppid = (IV)getppid();
4738 /* touch @F array to prevent spurious warnings 20020415 MJD */
4740 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4745 S_init_perllib(pTHX)
4751 s = PerlEnv_getenv("PERL5LIB");
4753 * It isn't possible to delete an environment variable with
4754 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4755 * case we treat PERL5LIB as undefined if it has a zero-length value.
4757 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4758 if (s && *s != '\0')
4762 incpush(s, TRUE, TRUE, TRUE, FALSE);
4764 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4766 /* Treat PERL5?LIB as a possible search list logical name -- the
4767 * "natural" VMS idiom for a Unix path string. We allow each
4768 * element to be a set of |-separated directories for compatibility.
4772 if (my_trnlnm("PERL5LIB",buf,0))
4773 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4775 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4779 /* Use the ~-expanded versions of APPLLIB (undocumented),
4780 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4783 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4787 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4789 #ifdef MACOS_TRADITIONAL
4792 SV * privdir = newSV(0);
4793 char * macperl = PerlEnv_getenv("MACPERL");
4798 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4799 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4800 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4801 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4802 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4803 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4805 SvREFCNT_dec(privdir);
4808 incpush(":", FALSE, FALSE, TRUE, FALSE);
4811 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4814 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4816 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4820 /* sitearch is always relative to sitelib on Windows for
4821 * DLL-based path intuition to work correctly */
4822 # if !defined(WIN32)
4823 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4829 /* this picks up sitearch as well */
4830 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4832 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4836 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4837 /* Search for version-specific dirs below here */
4838 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4841 #ifdef PERL_VENDORARCH_EXP
4842 /* vendorarch is always relative to vendorlib on Windows for
4843 * DLL-based path intuition to work correctly */
4844 # if !defined(WIN32)
4845 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4849 #ifdef PERL_VENDORLIB_EXP
4851 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4853 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4857 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4858 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4861 #ifdef PERL_OTHERLIBDIRS
4862 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4866 incpush(".", FALSE, FALSE, TRUE, FALSE);
4867 #endif /* MACOS_TRADITIONAL */
4870 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4871 # define PERLLIB_SEP ';'
4874 # define PERLLIB_SEP '|'
4876 # if defined(MACOS_TRADITIONAL)
4877 # define PERLLIB_SEP ','
4879 # define PERLLIB_SEP ':'
4883 #ifndef PERLLIB_MANGLE
4884 # define PERLLIB_MANGLE(s,n) (s)
4887 /* Push a directory onto @INC if it exists.
4888 Generate a new SV if we do this, to save needing to copy the SV we push
4891 S_incpush_if_exists(pTHX_ SV *dir)
4895 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4896 S_ISDIR(tmpstatbuf.st_mode)) {
4897 av_push(GvAVn(PL_incgv), dir);
4904 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4909 const char *p = dir;
4914 if (addsubdirs || addoldvers) {
4918 /* Break at all separators */
4920 SV *libdir = newSV(0);
4923 /* skip any consecutive separators */
4925 while ( *p == PERLLIB_SEP ) {
4926 /* Uncomment the next line for PATH semantics */
4927 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4932 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4933 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4938 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4939 p = NULL; /* break out */
4941 #ifdef MACOS_TRADITIONAL
4942 if (!strchr(SvPVX(libdir), ':')) {
4945 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4947 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4948 sv_catpvs(libdir, ":");
4951 /* Do the if() outside the #ifdef to avoid warnings about an unused
4954 #ifdef PERL_RELOCATABLE_INC
4956 * Relocatable include entries are marked with a leading .../
4959 * 0: Remove that leading ".../"
4960 * 1: Remove trailing executable name (anything after the last '/')
4961 * from the perl path to give a perl prefix
4963 * While the @INC element starts "../" and the prefix ends with a real
4964 * directory (ie not . or ..) chop that real directory off the prefix
4965 * and the leading "../" from the @INC element. ie a logical "../"
4967 * Finally concatenate the prefix and the remainder of the @INC element
4968 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4969 * generates /usr/local/lib/perl5
4971 const char *libpath = SvPVX(libdir);
4972 STRLEN libpath_len = SvCUR(libdir);
4973 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4975 SV * const caret_X = get_sv("\030", 0);
4976 /* Going to use the SV just as a scratch buffer holding a C
4982 /* $^X is *the* source of taint if tainting is on, hence
4983 SvPOK() won't be true. */
4985 assert(SvPOKp(caret_X));
4986 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4987 /* Firstly take off the leading .../
4988 If all else fail we'll do the paths relative to the current
4990 sv_chop(libdir, libpath + 4);
4991 /* Don't use SvPV as we're intentionally bypassing taining,
4992 mortal copies that the mg_get of tainting creates, and
4993 corruption that seems to come via the save stack.
4994 I guess that the save stack isn't correctly set up yet. */
4995 libpath = SvPVX(libdir);
4996 libpath_len = SvCUR(libdir);
4998 /* This would work more efficiently with memrchr, but as it's
4999 only a GNU extension we'd need to probe for it and
5000 implement our own. Not hard, but maybe not worth it? */
5002 prefix = SvPVX(prefix_sv);
5003 lastslash = strrchr(prefix, '/');
5005 /* First time in with the *lastslash = '\0' we just wipe off
5006 the trailing /perl from (say) /usr/foo/bin/perl
5010 while ((*lastslash = '\0'), /* Do that, come what may. */
5011 (libpath_len >= 3 && memEQ(libpath, "../", 3)
5012 && (lastslash = strrchr(prefix, '/')))) {
5013 if (lastslash[1] == '\0'
5014 || (lastslash[1] == '.'
5015 && (lastslash[2] == '/' /* ends "/." */
5016 || (lastslash[2] == '/'
5017 && lastslash[3] == '/' /* or "/.." */
5019 /* Prefix ends "/" or "/." or "/..", any of which
5020 are fishy, so don't do any more logical cleanup.
5024 /* Remove leading "../" from path */
5027 /* Next iteration round the loop removes the last
5028 directory name from prefix by writing a '\0' in
5029 the while clause. */
5031 /* prefix has been terminated with a '\0' to the correct
5032 length. libpath points somewhere into the libdir SV.
5033 We need to join the 2 with '/' and drop the result into
5035 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5036 SvREFCNT_dec(libdir);
5037 /* And this is the new libdir. */
5040 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5041 /* Need to taint reloccated paths if running set ID */
5042 SvTAINTED_on(libdir);
5045 SvREFCNT_dec(prefix_sv);
5050 * BEFORE pushing libdir onto @INC we may first push version- and
5051 * archname-specific sub-directories.
5053 if (addsubdirs || addoldvers) {
5054 #ifdef PERL_INC_VERSION_LIST
5055 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5056 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5057 const char * const *incver;
5063 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5065 while (unix[len-1] == '/') len--; /* Cosmetic */
5066 sv_usepvn(libdir,unix,len);
5069 PerlIO_printf(Perl_error_log,
5070 "Failed to unixify @INC element \"%s\"\n",
5074 #ifdef MACOS_TRADITIONAL
5075 #define PERL_AV_SUFFIX_FMT ""
5076 #define PERL_ARCH_FMT "%s:"
5077 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5079 #define PERL_AV_SUFFIX_FMT "/"
5080 #define PERL_ARCH_FMT "/%s"
5081 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5083 /* .../version/archname if -d .../version/archname */
5084 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5086 (int)PERL_REVISION, (int)PERL_VERSION,
5087 (int)PERL_SUBVERSION, ARCHNAME);
5088 subdir = S_incpush_if_exists(aTHX_ subdir);
5090 /* .../version if -d .../version */
5091 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5093 (int)PERL_REVISION, (int)PERL_VERSION,
5094 (int)PERL_SUBVERSION);
5095 subdir = S_incpush_if_exists(aTHX_ subdir);
5097 /* .../archname if -d .../archname */
5098 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5099 SVfARG(libdir), ARCHNAME);
5100 subdir = S_incpush_if_exists(aTHX_ subdir);
5104 #ifdef PERL_INC_VERSION_LIST
5106 for (incver = incverlist; *incver; incver++) {
5107 /* .../xxx if -d .../xxx */
5108 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5109 SVfARG(libdir), *incver);
5110 subdir = S_incpush_if_exists(aTHX_ subdir);
5116 /* finally push this lib directory on the end of @INC */
5117 av_push(GvAVn(PL_incgv), libdir);
5120 assert (SvREFCNT(subdir) == 1);
5121 SvREFCNT_dec(subdir);
5127 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5131 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5137 while (av_len(paramList) >= 0) {
5138 cv = (CV*)av_shift(paramList);
5140 if (paramList == PL_beginav) {
5141 /* save PL_beginav for compiler */
5142 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5144 else if (paramList == PL_checkav) {
5145 /* save PL_checkav for compiler */
5146 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5148 else if (paramList == PL_unitcheckav) {
5149 /* save PL_unitcheckav for compiler */
5150 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5161 PL_madskills |= 16384;
5166 PL_madskills &= ~16384;
5169 (void)SvPV_const(atsv, len);
5170 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5171 break; /* not really trying to run, so just wing it */
5173 PL_curcop = &PL_compiling;
5174 CopLINE_set(PL_curcop, oldline);
5175 if (paramList == PL_beginav)
5176 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5178 Perl_sv_catpvf(aTHX_ atsv,
5179 "%s failed--call queue aborted",
5180 paramList == PL_checkav ? "CHECK"
5181 : paramList == PL_initav ? "INIT"
5182 : paramList == PL_unitcheckav ? "UNITCHECK"
5184 while (PL_scopestack_ix > oldscope)
5187 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5194 /* my_exit() was called */
5195 while (PL_scopestack_ix > oldscope)
5198 PL_curstash = PL_defstash;
5199 PL_curcop = &PL_compiling;
5200 CopLINE_set(PL_curcop, oldline);
5202 if (PL_madskills && PL_minus_c && paramList == PL_beginav)
5203 return; /* not really trying to run, so just wing it */
5204 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5205 if (paramList == PL_beginav)
5206 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5208 Perl_croak(aTHX_ "%s failed--call queue aborted",
5209 paramList == PL_checkav ? "CHECK"
5210 : paramList == PL_initav ? "INIT"
5211 : paramList == PL_unitcheckav ? "UNITCHECK"
5218 PL_curcop = &PL_compiling;
5219 CopLINE_set(PL_curcop, oldline);
5222 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5231 Perl_my_exit(pTHX_ U32 status)
5234 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5235 (void*)thr, (unsigned long) status));
5244 STATUS_EXIT_SET(status);
5251 Perl_my_failure_exit(pTHX)
5255 /* We have been called to fall on our sword. The desired exit code
5256 * should be already set in STATUS_UNIX, but could be shifted over
5257 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5260 * If an error code has not been set, then force the issue.
5262 if (MY_POSIX_EXIT) {
5264 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5265 * the exit code when there isn't an error.
5268 if (STATUS_UNIX == 0)
5269 STATUS_UNIX_EXIT_SET(255);
5271 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5273 /* The exit code could have been set by $? or vmsish which
5274 * means that it may not be fatal. So convert
5275 * success/warning codes to fatal.
5277 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5278 STATUS_UNIX_EXIT_SET(255);
5282 /* Traditionally Perl on VMS always expects a Fatal Error. */
5283 if (vaxc$errno & 1) {
5285 /* So force success status to failure */
5286 if (STATUS_NATIVE & 1)
5291 STATUS_UNIX = EINTR; /* In case something cares */
5296 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5298 /* Encode the severity code */
5299 severity = STATUS_NATIVE & STS$M_SEVERITY;
5300 STATUS_UNIX = (severity ? severity : 1) << 8;
5302 /* Perl expects this to be a fatal error */
5303 if (severity != STS$K_SEVERE)
5312 STATUS_UNIX_SET(errno);
5314 exitstatus = STATUS_UNIX >> 8;
5315 if (exitstatus & 255)
5316 STATUS_UNIX_SET(exitstatus);
5318 STATUS_UNIX_SET(255);
5325 S_my_exit_jump(pTHX)
5330 SvREFCNT_dec(PL_e_script);
5334 POPSTACK_TO(PL_mainstack);
5342 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5345 const char * const p = SvPVX_const(PL_e_script);
5346 const char *nl = strchr(p, '\n');
5348 PERL_UNUSED_ARG(idx);
5349 PERL_UNUSED_ARG(maxlen);
5351 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5353 filter_del(read_e_script);
5356 sv_catpvn(buf_sv, p, nl-p);
5357 sv_chop(PL_e_script, nl);
5363 * c-indentation-style: bsd
5365 * indent-tabs-mode: t
5368 * ex: set ts=8 sts=4 sw=4 noet: