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);
130 /* Drop scriptname */
131 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ validarg, fdscript, suidscript, linestr_sv, rsfp)
133 /* Drop suidscript */
134 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ validarg, scriptname, fdscript, linestr_sv, rsfp)
137 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
138 /* Drop everything. Heck, don't even try to call it */
139 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
141 /* Drop almost everything */
142 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
146 #define CALL_BODY_EVAL(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entereval(aTHX); \
152 #define CALL_BODY_SUB(myop) \
153 if (PL_op == (myop)) \
154 PL_op = Perl_pp_entersub(aTHX); \
158 #define CALL_LIST_BODY(cv) \
159 PUSHMARK(PL_stack_sp); \
160 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
163 S_init_tls_and_interp(PerlInterpreter *my_perl)
167 PERL_SET_INTERP(my_perl);
168 #if defined(USE_ITHREADS)
171 PERL_SET_THX(my_perl);
174 MUTEX_INIT(&PL_dollarzero_mutex);
176 #ifdef PERL_IMPLICIT_CONTEXT
177 MUTEX_INIT(&PL_my_ctx_mutex);
180 #if defined(USE_ITHREADS)
183 /* This always happens for non-ithreads */
186 PERL_SET_THX(my_perl);
191 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
194 Perl_sys_init(int* argc, char*** argv)
197 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
198 PERL_UNUSED_ARG(argv);
199 PERL_SYS_INIT_BODY(argc, argv);
203 Perl_sys_init3(int* argc, char*** argv, char*** env)
206 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
207 PERL_UNUSED_ARG(argv);
208 PERL_UNUSED_ARG(env);
209 PERL_SYS_INIT3_BODY(argc, argv, env);
216 if (!PL_veto_cleanup) {
217 PERL_SYS_TERM_BODY();
222 #ifdef PERL_IMPLICIT_SYS
224 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
225 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
226 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
227 struct IPerlDir* ipD, struct IPerlSock* ipS,
228 struct IPerlProc* ipP)
230 PerlInterpreter *my_perl;
231 /* Newx() needs interpreter, so call malloc() instead */
232 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
233 S_init_tls_and_interp(my_perl);
234 Zero(my_perl, 1, PerlInterpreter);
244 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
251 =head1 Embedding Functions
253 =for apidoc perl_alloc
255 Allocates a new Perl interpreter. See L<perlembed>.
263 PerlInterpreter *my_perl;
265 /* Newx() needs interpreter, so call malloc() instead */
266 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
268 S_init_tls_and_interp(my_perl);
269 #ifndef PERL_TRACK_MEMPOOL
270 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
272 Zero(my_perl, 1, PerlInterpreter);
273 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
277 #endif /* PERL_IMPLICIT_SYS */
280 =for apidoc perl_construct
282 Initializes a new Perl interpreter. See L<perlembed>.
288 perl_construct(pTHXx)
291 PERL_UNUSED_ARG(my_perl);
294 PL_perl_destruct_level = 1;
296 if (PL_perl_destruct_level > 0)
299 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
301 /* set read-only and try to insure than we wont see REFCNT==0
304 SvREADONLY_on(&PL_sv_undef);
305 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
307 sv_setpv(&PL_sv_no,PL_No);
308 /* value lookup in void context - happens to have the side effect
309 of caching the numeric forms. However, as &PL_sv_no doesn't contain
310 a string that is a valid numer, we have to turn the public flags by
316 SvREADONLY_on(&PL_sv_no);
317 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
319 sv_setpv(&PL_sv_yes,PL_Yes);
322 SvREADONLY_on(&PL_sv_yes);
323 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
325 SvREADONLY_on(&PL_sv_placeholder);
326 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
328 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
329 #ifdef PERL_USES_PL_PIDSTATUS
330 PL_pidstatus = newHV();
333 PL_rs = newSVpvs("\n");
343 SET_NUMERIC_STANDARD();
345 #if defined(LOCAL_PATCH_COUNT)
346 PL_localpatches = local_patches; /* For possible -v */
349 #ifdef HAVE_INTERP_INTERN
353 PerlIO_init(aTHX); /* Hook to IO system */
355 PL_fdpid = newAV(); /* for remembering popen pids by fd */
356 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
357 PL_errors = newSVpvs("");
358 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
359 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
360 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
362 /* First entry is a list of empty elements. It needs to be initialised
363 else all hell breaks loose in S_find_uninit_var(). */
364 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
365 PL_regex_pad = AvARRAY(PL_regex_padav);
367 #ifdef USE_REENTRANT_API
368 Perl_reentrant_init(aTHX);
371 /* Note that strtab is a rather special HV. Assumptions are made
372 about not iterating on it, and not adding tie magic to it.
373 It is properly deallocated in perl_destruct() */
376 HvSHAREKEYS_off(PL_strtab); /* mandatory */
377 hv_ksplit(PL_strtab, 512);
379 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
380 _dyld_lookup_and_bind
381 ("__environ", (unsigned long *) &environ_pointer, NULL);
385 # ifdef USE_ENVIRON_ARRAY
386 PL_origenviron = environ;
390 /* Use sysconf(_SC_CLK_TCK) if available, if not
391 * available or if the sysconf() fails, use the HZ.
392 * BeOS has those, but returns the wrong value.
393 * The HZ if not originally defined has been by now
394 * been defined as CLK_TCK, if available. */
395 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
396 PL_clocktick = sysconf(_SC_CLK_TCK);
397 if (PL_clocktick <= 0)
401 PL_stashcache = newHV();
403 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
404 (int)PERL_VERSION, (int)PERL_SUBVERSION);
407 if (!PL_mmap_page_size) {
408 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
410 SETERRNO(0, SS_NORMAL);
412 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
414 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
416 if ((long) PL_mmap_page_size < 0) {
418 SV * const error = ERRSV;
419 SvUPGRADE(error, SVt_PV);
420 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
423 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
427 # ifdef HAS_GETPAGESIZE
428 PL_mmap_page_size = getpagesize();
430 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
431 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
435 if (PL_mmap_page_size <= 0)
436 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
437 (IV) PL_mmap_page_size);
439 #endif /* HAS_MMAP */
441 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
442 PL_timesbase.tms_utime = 0;
443 PL_timesbase.tms_stime = 0;
444 PL_timesbase.tms_cutime = 0;
445 PL_timesbase.tms_cstime = 0;
452 =for apidoc nothreadhook
454 Stub that provides thread hook for perl_destruct when there are
461 Perl_nothreadhook(pTHX)
467 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
469 Perl_dump_sv_child(pTHX_ SV *sv)
472 const int sock = PL_dumper_fd;
473 const int debug_fd = PerlIO_fileno(Perl_debug_log);
474 union control_un control;
477 struct cmsghdr *cmptr;
479 unsigned char buffer[256];
481 if(sock == -1 || debug_fd == -1)
484 PerlIO_flush(Perl_debug_log);
486 /* All these shenanigans are to pass a file descriptor over to our child for
487 it to dump out to. We can't let it hold open the file descriptor when it
488 forks, as the file descriptor it will dump to can turn out to be one end
489 of pipe that some other process will wait on for EOF. (So as it would
490 be open, the wait would be forever.) */
492 msg.msg_control = control.control;
493 msg.msg_controllen = sizeof(control.control);
494 /* We're a connected socket so we don't need a destination */
500 cmptr = CMSG_FIRSTHDR(&msg);
501 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
502 cmptr->cmsg_level = SOL_SOCKET;
503 cmptr->cmsg_type = SCM_RIGHTS;
504 *((int *)CMSG_DATA(cmptr)) = 1;
506 vec[0].iov_base = (void*)&sv;
507 vec[0].iov_len = sizeof(sv);
508 got = sendmsg(sock, &msg, 0);
511 perror("Debug leaking scalars parent sendmsg failed");
514 if(got < sizeof(sv)) {
515 perror("Debug leaking scalars parent short sendmsg");
519 /* Return protocol is
521 unsigned char: length of location string (0 for empty)
522 unsigned char*: string (not terminated)
524 vec[0].iov_base = (void*)&returned_errno;
525 vec[0].iov_len = sizeof(returned_errno);
526 vec[1].iov_base = buffer;
529 got = readv(sock, vec, 2);
532 perror("Debug leaking scalars parent read failed");
533 PerlIO_flush(PerlIO_stderr());
536 if(got < sizeof(returned_errno) + 1) {
537 perror("Debug leaking scalars parent short read");
538 PerlIO_flush(PerlIO_stderr());
543 got = read(sock, buffer + 1, *buffer);
545 perror("Debug leaking scalars parent read 2 failed");
546 PerlIO_flush(PerlIO_stderr());
551 perror("Debug leaking scalars parent short read 2");
552 PerlIO_flush(PerlIO_stderr());
557 if (returned_errno || *buffer) {
558 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
559 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
560 returned_errno, strerror(returned_errno));
566 =for apidoc perl_destruct
568 Shuts down a Perl interpreter. See L<perlembed>.
577 VOL signed char destruct_level; /* see possible values in intrpvar.h */
579 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
583 PERL_UNUSED_ARG(my_perl);
585 /* wait for all pseudo-forked children to finish */
586 PERL_WAIT_FOR_CHILDREN;
588 destruct_level = PL_perl_destruct_level;
591 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
593 const int i = atoi(s);
594 if (destruct_level < i)
600 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
606 if (PL_endav && !PL_minus_c)
607 call_list(PL_scopestack_ix, PL_endav);
613 /* Need to flush since END blocks can produce output */
616 if (CALL_FPTR(PL_threadhook)(aTHX)) {
617 /* Threads hook has vetoed further cleanup */
618 PL_veto_cleanup = TRUE;
622 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
623 if (destruct_level != 0) {
624 /* Fork here to create a child. Our child's job is to preserve the
625 state of scalars prior to destruction, so that we can instruct it
626 to dump any scalars that we later find have leaked.
627 There's no subtlety in this code - it assumes POSIX, and it doesn't
631 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
632 perror("Debug leaking scalars socketpair failed");
638 perror("Debug leaking scalars fork failed");
642 /* We are the child */
643 const int sock = fd[1];
644 const int debug_fd = PerlIO_fileno(Perl_debug_log);
647 /* Our success message is an integer 0, and a char 0 */
648 static const char success[sizeof(int) + 1];
652 /* We need to close all other file descriptors otherwise we end up
653 with interesting hangs, where the parent closes its end of a
654 pipe, and sits waiting for (another) child to terminate. Only
655 that child never terminates, because it never gets EOF, because
656 we also have the far end of the pipe open. We even need to
657 close the debugging fd, because sometimes it happens to be one
658 end of a pipe, and a process is waiting on the other end for
659 EOF. Normally it would be closed at some point earlier in
660 destruction, but if we happen to cause the pipe to remain open,
661 EOF never occurs, and we get an infinite hang. Hence all the
662 games to pass in a file descriptor if it's actually needed. */
664 f = sysconf(_SC_OPEN_MAX);
666 where = "sysconf failed";
677 union control_un control;
680 struct cmsghdr *cmptr;
684 msg.msg_control = control.control;
685 msg.msg_controllen = sizeof(control.control);
686 /* We're a connected socket so we don't need a source */
690 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
692 vec[0].iov_base = (void*)⌖
693 vec[0].iov_len = sizeof(target);
695 got = recvmsg(sock, &msg, 0);
700 where = "recv failed";
703 if(got < sizeof(target)) {
704 where = "short recv";
708 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
712 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
713 where = "wrong cmsg_len";
716 if(cmptr->cmsg_level != SOL_SOCKET) {
717 where = "wrong cmsg_level";
720 if(cmptr->cmsg_type != SCM_RIGHTS) {
721 where = "wrong cmsg_type";
725 got_fd = *(int*)CMSG_DATA(cmptr);
726 /* For our last little bit of trickery, put the file descriptor
727 back into Perl_debug_log, as if we never actually closed it
729 if(got_fd != debug_fd) {
730 if (dup2(got_fd, debug_fd) == -1) {
737 PerlIO_flush(Perl_debug_log);
739 got = write(sock, &success, sizeof(success));
742 where = "write failed";
745 if(got < sizeof(success)) {
746 where = "short write";
753 int send_errno = errno;
754 unsigned char length = (unsigned char) strlen(where);
755 struct iovec failure[3] = {
756 {(void*)&send_errno, sizeof(send_errno)},
758 {(void*)where, length}
760 int got = writev(sock, failure, 3);
761 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
762 in the parent if we try to read from the socketpair after the
763 child has exited, even if there was data to read.
764 So sleep a bit to give the parent a fighting chance of
767 _exit((got == -1) ? errno : 0);
771 PL_dumper_fd = fd[0];
776 /* We must account for everything. */
778 /* Destroy the main CV and syntax tree */
779 /* Do this now, because destroying ops can cause new SVs to be generated
780 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
781 PL_curcop to point to a valid op from which the filename structure
783 PL_curcop = &PL_compiling;
785 /* ensure comppad/curpad to refer to main's pad */
786 if (CvPADLIST(PL_main_cv)) {
787 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
789 op_free(PL_main_root);
792 PL_main_start = NULL;
793 SvREFCNT_dec(PL_main_cv);
797 /* Tell PerlIO we are about to tear things apart in case
798 we have layers which are using resources that should
802 PerlIO_destruct(aTHX);
804 if (PL_sv_objcount) {
806 * Try to destruct global references. We do this first so that the
807 * destructors and destructees still exist. Some sv's might remain.
808 * Non-referenced objects are on their own.
812 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
813 PL_defoutgv = NULL; /* may have been freed */
816 /* unhook hooks which will soon be, or use, destroyed data */
817 SvREFCNT_dec(PL_warnhook);
819 SvREFCNT_dec(PL_diehook);
822 /* call exit list functions */
823 while (PL_exitlistlen-- > 0)
824 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
826 Safefree(PL_exitlist);
831 /* jettison our possibly duplicated environment */
832 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
833 * so we certainly shouldn't free it here
836 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
837 if (environ != PL_origenviron && !PL_use_safe_putenv
839 /* only main thread can free environ[0] contents */
840 && PL_curinterp == aTHX
846 for (i = 0; environ[i]; i++)
847 safesysfree(environ[i]);
849 /* Must use safesysfree() when working with environ. */
850 safesysfree(environ);
852 environ = PL_origenviron;
855 #endif /* !PERL_MICRO */
857 if (destruct_level == 0) {
859 DEBUG_P(debprofdump());
861 #if defined(PERLIO_LAYERS)
862 /* No more IO - including error messages ! */
863 PerlIO_cleanup(aTHX);
866 CopFILE_free(&PL_compiling);
867 CopSTASH_free(&PL_compiling);
869 /* The exit() function will do everything that needs doing. */
873 /* reset so print() ends up where we expect */
877 /* the syntax tree is shared between clones
878 * so op_free(PL_main_root) only ReREFCNT_dec's
879 * REGEXPs in the parent interpreter
880 * we need to manually ReREFCNT_dec for the clones
882 SvREFCNT_dec(PL_regex_padav);
883 PL_regex_padav = NULL;
887 SvREFCNT_dec((SV*) PL_stashcache);
888 PL_stashcache = NULL;
890 /* loosen bonds of global variables */
892 /* XXX can PL_parser still be non-null here? */
893 if(PL_parser && PL_parser->rsfp) {
894 (void)PerlIO_close(PL_parser->rsfp);
895 PL_parser->rsfp = NULL;
899 Safefree(PL_splitstr);
909 PL_doswitches = FALSE;
910 PL_dowarn = G_WARN_OFF;
911 PL_doextract = FALSE;
912 PL_sawampersand = FALSE; /* must save all match strings */
915 Safefree(PL_inplace);
917 SvREFCNT_dec(PL_patchlevel);
920 SvREFCNT_dec(PL_e_script);
926 /* magical thingies */
928 SvREFCNT_dec(PL_ofs_sv); /* $, */
931 SvREFCNT_dec(PL_ors_sv); /* $\ */
934 SvREFCNT_dec(PL_rs); /* $/ */
937 Safefree(PL_osname); /* $^O */
940 SvREFCNT_dec(PL_statname);
944 /* defgv, aka *_ should be taken care of elsewhere */
946 /* clean up after study() */
947 SvREFCNT_dec(PL_lastscream);
948 PL_lastscream = NULL;
949 Safefree(PL_screamfirst);
951 Safefree(PL_screamnext);
955 Safefree(PL_efloatbuf);
959 /* startup and shutdown function lists */
960 SvREFCNT_dec(PL_beginav);
961 SvREFCNT_dec(PL_beginav_save);
962 SvREFCNT_dec(PL_endav);
963 SvREFCNT_dec(PL_checkav);
964 SvREFCNT_dec(PL_checkav_save);
965 SvREFCNT_dec(PL_unitcheckav);
966 SvREFCNT_dec(PL_unitcheckav_save);
967 SvREFCNT_dec(PL_initav);
969 PL_beginav_save = NULL;
972 PL_checkav_save = NULL;
973 PL_unitcheckav = NULL;
974 PL_unitcheckav_save = NULL;
977 /* shortcuts just get cleared */
986 PL_last_in_gv = NULL;
998 SvREFCNT_dec(PL_argvout_stack);
999 PL_argvout_stack = NULL;
1001 SvREFCNT_dec(PL_modglobal);
1002 PL_modglobal = NULL;
1003 SvREFCNT_dec(PL_preambleav);
1004 PL_preambleav = NULL;
1005 SvREFCNT_dec(PL_subname);
1007 #ifdef PERL_USES_PL_PIDSTATUS
1008 SvREFCNT_dec(PL_pidstatus);
1009 PL_pidstatus = NULL;
1011 SvREFCNT_dec(PL_toptarget);
1012 PL_toptarget = NULL;
1013 SvREFCNT_dec(PL_bodytarget);
1014 PL_bodytarget = NULL;
1015 PL_formtarget = NULL;
1017 /* free locale stuff */
1018 #ifdef USE_LOCALE_COLLATE
1019 Safefree(PL_collation_name);
1020 PL_collation_name = NULL;
1023 #ifdef USE_LOCALE_NUMERIC
1024 Safefree(PL_numeric_name);
1025 PL_numeric_name = NULL;
1026 SvREFCNT_dec(PL_numeric_radix_sv);
1027 PL_numeric_radix_sv = NULL;
1030 /* clear utf8 character classes */
1031 SvREFCNT_dec(PL_utf8_alnum);
1032 SvREFCNT_dec(PL_utf8_alnumc);
1033 SvREFCNT_dec(PL_utf8_ascii);
1034 SvREFCNT_dec(PL_utf8_alpha);
1035 SvREFCNT_dec(PL_utf8_space);
1036 SvREFCNT_dec(PL_utf8_cntrl);
1037 SvREFCNT_dec(PL_utf8_graph);
1038 SvREFCNT_dec(PL_utf8_digit);
1039 SvREFCNT_dec(PL_utf8_upper);
1040 SvREFCNT_dec(PL_utf8_lower);
1041 SvREFCNT_dec(PL_utf8_print);
1042 SvREFCNT_dec(PL_utf8_punct);
1043 SvREFCNT_dec(PL_utf8_xdigit);
1044 SvREFCNT_dec(PL_utf8_mark);
1045 SvREFCNT_dec(PL_utf8_toupper);
1046 SvREFCNT_dec(PL_utf8_totitle);
1047 SvREFCNT_dec(PL_utf8_tolower);
1048 SvREFCNT_dec(PL_utf8_tofold);
1049 SvREFCNT_dec(PL_utf8_idstart);
1050 SvREFCNT_dec(PL_utf8_idcont);
1051 PL_utf8_alnum = NULL;
1052 PL_utf8_alnumc = NULL;
1053 PL_utf8_ascii = NULL;
1054 PL_utf8_alpha = NULL;
1055 PL_utf8_space = NULL;
1056 PL_utf8_cntrl = NULL;
1057 PL_utf8_graph = NULL;
1058 PL_utf8_digit = NULL;
1059 PL_utf8_upper = NULL;
1060 PL_utf8_lower = NULL;
1061 PL_utf8_print = NULL;
1062 PL_utf8_punct = NULL;
1063 PL_utf8_xdigit = NULL;
1064 PL_utf8_mark = NULL;
1065 PL_utf8_toupper = NULL;
1066 PL_utf8_totitle = NULL;
1067 PL_utf8_tolower = NULL;
1068 PL_utf8_tofold = NULL;
1069 PL_utf8_idstart = NULL;
1070 PL_utf8_idcont = NULL;
1072 if (!specialWARN(PL_compiling.cop_warnings))
1073 PerlMemShared_free(PL_compiling.cop_warnings);
1074 PL_compiling.cop_warnings = NULL;
1075 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1076 PL_compiling.cop_hints_hash = NULL;
1077 CopFILE_free(&PL_compiling);
1078 CopSTASH_free(&PL_compiling);
1080 /* Prepare to destruct main symbol table. */
1085 SvREFCNT_dec(PL_curstname);
1086 PL_curstname = NULL;
1088 /* clear queued errors */
1089 SvREFCNT_dec(PL_errors);
1092 SvREFCNT_dec(PL_isarev);
1095 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1096 if (PL_scopestack_ix != 0)
1097 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1098 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1099 (long)PL_scopestack_ix);
1100 if (PL_savestack_ix != 0)
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1102 "Unbalanced saves: %ld more saves than restores\n",
1103 (long)PL_savestack_ix);
1104 if (PL_tmps_floor != -1)
1105 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1106 (long)PL_tmps_floor + 1);
1107 if (cxstack_ix != -1)
1108 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1109 (long)cxstack_ix + 1);
1112 /* Now absolutely destruct everything, somehow or other, loops or no. */
1113 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1114 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1116 /* the 2 is for PL_fdpid and PL_strtab */
1117 while (PL_sv_count > 2 && sv_clean_all())
1120 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1121 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1122 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1123 SvFLAGS(PL_strtab) |= SVt_PVHV;
1125 AvREAL_off(PL_fdpid); /* no surviving entries */
1126 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1129 #ifdef HAVE_INTERP_INTERN
1133 /* Destruct the global string table. */
1135 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1136 * so that sv_free() won't fail on them.
1137 * Now that the global string table is using a single hunk of memory
1138 * for both HE and HEK, we either need to explicitly unshare it the
1139 * correct way, or actually free things here.
1142 const I32 max = HvMAX(PL_strtab);
1143 HE * const * const array = HvARRAY(PL_strtab);
1144 HE *hent = array[0];
1147 if (hent && ckWARN_d(WARN_INTERNAL)) {
1148 HE * const next = HeNEXT(hent);
1149 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1150 "Unbalanced string table refcount: (%ld) for \"%s\"",
1151 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1158 hent = array[riter];
1163 HvARRAY(PL_strtab) = 0;
1164 HvTOTALKEYS(PL_strtab) = 0;
1165 HvFILL(PL_strtab) = 0;
1167 SvREFCNT_dec(PL_strtab);
1170 /* free the pointer tables used for cloning */
1171 ptr_table_free(PL_ptr_table);
1172 PL_ptr_table = (PTR_TBL_t*)NULL;
1175 /* free special SVs */
1177 SvREFCNT(&PL_sv_yes) = 0;
1178 sv_clear(&PL_sv_yes);
1179 SvANY(&PL_sv_yes) = NULL;
1180 SvFLAGS(&PL_sv_yes) = 0;
1182 SvREFCNT(&PL_sv_no) = 0;
1183 sv_clear(&PL_sv_no);
1184 SvANY(&PL_sv_no) = NULL;
1185 SvFLAGS(&PL_sv_no) = 0;
1189 for (i=0; i<=2; i++) {
1190 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1191 sv_clear(PERL_DEBUG_PAD(i));
1192 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1193 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1197 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1198 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1200 #ifdef DEBUG_LEAKING_SCALARS
1201 if (PL_sv_count != 0) {
1206 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1207 svend = &sva[SvREFCNT(sva)];
1208 for (sv = sva + 1; sv < svend; ++sv) {
1209 if (SvTYPE(sv) != SVTYPEMASK) {
1210 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1212 " refcnt=%"UVuf pTHX__FORMAT "\n"
1213 "\tallocated at %s:%d %s %s%s\n",
1214 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1216 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1218 sv->sv_debug_inpad ? "for" : "by",
1219 sv->sv_debug_optype ?
1220 PL_op_name[sv->sv_debug_optype]: "(none)",
1221 sv->sv_debug_cloned ? " (cloned)" : ""
1223 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1224 Perl_dump_sv_child(aTHX_ sv);
1230 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1234 /* Wait for up to 4 seconds for child to terminate.
1235 This seems to be the least effort way of timing out on reaping
1237 struct timeval waitfor = {4, 0};
1238 int sock = PL_dumper_fd;
1242 FD_SET(sock, &rset);
1243 select(sock + 1, &rset, NULL, NULL, &waitfor);
1244 waitpid(child, &status, WNOHANG);
1249 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1255 #ifdef PERL_DEBUG_READONLY_OPS
1261 #if defined(PERLIO_LAYERS)
1262 /* No more IO - including error messages ! */
1263 PerlIO_cleanup(aTHX);
1266 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1267 as currently layers use it rather than NULL as a marker
1268 for no arg - and will try and SvREFCNT_dec it.
1270 SvREFCNT(&PL_sv_undef) = 0;
1271 SvREADONLY_off(&PL_sv_undef);
1273 Safefree(PL_origfilename);
1274 PL_origfilename = NULL;
1275 Safefree(PL_reg_start_tmp);
1276 PL_reg_start_tmp = (char**)NULL;
1277 PL_reg_start_tmpl = 0;
1278 Safefree(PL_reg_curpm);
1279 Safefree(PL_reg_poscache);
1280 free_tied_hv_pool();
1281 Safefree(PL_op_mask);
1282 Safefree(PL_psig_ptr);
1283 PL_psig_ptr = (SV**)NULL;
1284 Safefree(PL_psig_name);
1285 PL_psig_name = (SV**)NULL;
1286 Safefree(PL_bitcount);
1288 Safefree(PL_psig_pend);
1289 PL_psig_pend = (int*)NULL;
1292 PL_tainting = FALSE;
1293 PL_taint_warn = FALSE;
1294 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1297 DEBUG_P(debprofdump());
1299 #ifdef USE_REENTRANT_API
1300 Perl_reentrant_free(aTHX);
1305 while (PL_regmatch_slab) {
1306 regmatch_slab *s = PL_regmatch_slab;
1307 PL_regmatch_slab = PL_regmatch_slab->next;
1311 /* As the absolutely last thing, free the non-arena SV for mess() */
1314 /* we know that type == SVt_PVMG */
1316 /* it could have accumulated taint magic */
1319 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1320 moremagic = mg->mg_moremagic;
1321 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1323 Safefree(mg->mg_ptr);
1327 /* we know that type >= SVt_PV */
1328 SvPV_free(PL_mess_sv);
1329 Safefree(SvANY(PL_mess_sv));
1330 Safefree(PL_mess_sv);
1337 =for apidoc perl_free
1339 Releases a Perl interpreter. See L<perlembed>.
1349 if (PL_veto_cleanup)
1352 #ifdef PERL_TRACK_MEMPOOL
1355 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1356 * value as we're probably hunting memory leaks then
1358 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1359 if (!s || atoi(s) == 0) {
1360 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1361 thread at thread exit. */
1362 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1363 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1368 #if defined(WIN32) || defined(NETWARE)
1369 # if defined(PERL_IMPLICIT_SYS)
1372 void *host = nw_internal_host;
1374 void *host = w32_internal_host;
1376 PerlMem_free(aTHXx);
1378 nw_delete_internal_host(host);
1380 win32_delete_internal_host(host);
1384 PerlMem_free(aTHXx);
1387 PerlMem_free(aTHXx);
1391 #if defined(USE_ITHREADS)
1392 /* provide destructors to clean up the thread key when libperl is unloaded */
1393 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1395 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1396 #pragma fini "perl_fini"
1397 #elif defined(__sun) && !defined(__GNUC__)
1398 #pragma fini (perl_fini)
1402 #if defined(__GNUC__)
1403 __attribute__((destructor))
1408 if (PL_curinterp && !PL_veto_cleanup)
1413 #endif /* THREADS */
1416 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1419 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1420 PL_exitlist[PL_exitlistlen].fn = fn;
1421 PL_exitlist[PL_exitlistlen].ptr = ptr;
1425 #ifdef HAS_PROCSELFEXE
1426 /* This is a function so that we don't hold on to MAXPATHLEN
1427 bytes of stack longer than necessary
1430 S_procself_val(pTHX_ SV *sv, const char *arg0)
1432 char buf[MAXPATHLEN];
1433 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1435 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1436 includes a spurious NUL which will cause $^X to fail in system
1437 or backticks (this will prevent extensions from being built and
1438 many tests from working). readlink is not meant to add a NUL.
1439 Normal readlink works fine.
1441 if (len > 0 && buf[len-1] == '\0') {
1445 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1446 returning the text "unknown" from the readlink rather than the path
1447 to the executable (or returning an error from the readlink). Any valid
1448 path has a '/' in it somewhere, so use that to validate the result.
1449 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1451 if (len > 0 && memchr(buf, '/', len)) {
1452 sv_setpvn(sv,buf,len);
1458 #endif /* HAS_PROCSELFEXE */
1461 S_set_caret_X(pTHX) {
1463 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1465 #ifdef HAS_PROCSELFEXE
1466 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1469 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1471 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1478 =for apidoc perl_parse
1480 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1486 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1493 PERL_UNUSED_ARG(my_perl);
1495 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW_AND_IAMSUID
1496 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now "
1497 "execute\nsetuid perl scripts securely.\n");
1500 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1501 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1502 * This MUST be done before any hash stores or fetches take place.
1503 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1504 * yourself, it is your responsibility to provide a good random seed!
1505 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1506 if (!PL_rehash_seed_set)
1507 PL_rehash_seed = get_hash_seed();
1509 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1511 if (s && (atoi(s) == 1))
1512 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1514 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1519 if (PL_origalen != 0) {
1520 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1523 /* Set PL_origalen be the sum of the contiguous argv[]
1524 * elements plus the size of the env in case that it is
1525 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1526 * as the maximum modifiable length of $0. In the worst case
1527 * the area we are able to modify is limited to the size of
1528 * the original argv[0]. (See below for 'contiguous', though.)
1530 const char *s = NULL;
1533 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1534 /* Do the mask check only if the args seem like aligned. */
1536 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1538 /* See if all the arguments are contiguous in memory. Note
1539 * that 'contiguous' is a loose term because some platforms
1540 * align the argv[] and the envp[]. If the arguments look
1541 * like non-aligned, assume that they are 'strictly' or
1542 * 'traditionally' contiguous. If the arguments look like
1543 * aligned, we just check that they are within aligned
1544 * PTRSIZE bytes. As long as no system has something bizarre
1545 * like the argv[] interleaved with some other data, we are
1546 * fine. (Did I just evoke Murphy's Law?) --jhi */
1547 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1549 for (i = 1; i < PL_origargc; i++) {
1550 if ((PL_origargv[i] == s + 1
1552 || PL_origargv[i] == s + 2
1557 (PL_origargv[i] > s &&
1559 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1570 #ifndef PERL_USE_SAFE_PUTENV
1571 /* Can we grab env area too to be used as the area for $0? */
1572 if (s && PL_origenviron && !PL_use_safe_putenv) {
1573 if ((PL_origenviron[0] == s + 1)
1576 (PL_origenviron[0] > s &&
1577 PL_origenviron[0] <=
1578 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1581 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1582 s = PL_origenviron[0];
1585 my_setenv("NoNe SuCh", NULL);
1586 /* Force copy of environment. */
1587 for (i = 1; PL_origenviron[i]; i++) {
1588 if (PL_origenviron[i] == s + 1
1591 (PL_origenviron[i] > s &&
1592 PL_origenviron[i] <=
1593 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1596 s = PL_origenviron[i];
1604 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1606 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1611 /* Come here if running an undumped a.out. */
1613 PL_origfilename = savepv(argv[0]);
1614 PL_do_undump = FALSE;
1615 cxstack_ix = -1; /* start label stack again */
1617 assert (!PL_tainted);
1619 S_set_caret_X(aTHX);
1621 init_postdump_symbols(argc,argv,env);
1626 op_free(PL_main_root);
1627 PL_main_root = NULL;
1629 PL_main_start = NULL;
1630 SvREFCNT_dec(PL_main_cv);
1634 oldscope = PL_scopestack_ix;
1635 PL_dowarn = G_WARN_OFF;
1640 parse_body(env,xsinit);
1642 call_list(oldscope, PL_unitcheckav);
1644 call_list(oldscope, PL_checkav);
1651 /* my_exit() was called */
1652 while (PL_scopestack_ix > oldscope)
1655 PL_curstash = PL_defstash;
1657 call_list(oldscope, PL_unitcheckav);
1659 call_list(oldscope, PL_checkav);
1663 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1672 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1676 int argc = PL_origargc;
1677 char **argv = PL_origargv;
1678 const char *scriptname = NULL;
1679 VOL bool dosearch = FALSE;
1680 const char *validarg = "";
1683 const char *cddir = NULL;
1684 #ifdef USE_SITECUSTOMIZE
1685 bool minus_f = FALSE;
1687 SV *linestr_sv = newSV_type(SVt_PVIV);
1688 bool add_read_e_script = FALSE;
1690 SvGROW(linestr_sv, 80);
1691 sv_setpvn(linestr_sv,"",0);
1693 sv = newSVpvs(""); /* first used for -I flags */
1699 for (argc--,argv++; argc > 0; argc--,argv++) {
1700 if (argv[0][0] != '-' || !argv[0][1])
1704 validarg = " PHOOEY ";
1708 * Can we rely on the kernel to start scripts with argv[1] set to
1709 * contain all #! line switches (the whole line)? (argv[0] is set to
1710 * the interpreter name, argv[2] to the script name; argv[3] and
1711 * above may contain other arguments.)
1718 #ifndef PERL_STRICT_CR
1742 if ((s = moreswitches(s)))
1747 CHECK_MALLOC_TOO_LATE_FOR('t');
1748 if( !PL_tainting ) {
1749 PL_taint_warn = TRUE;
1755 CHECK_MALLOC_TOO_LATE_FOR('T');
1757 PL_taint_warn = FALSE;
1765 #ifdef MACOS_TRADITIONAL
1766 /* ignore -e for Dev:Pseudo argument */
1767 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1770 forbid_setid('e', FALSE);
1772 PL_e_script = newSVpvs("");
1773 add_read_e_script = TRUE;
1776 sv_catpv(PL_e_script, s);
1778 sv_catpv(PL_e_script, argv[1]);
1782 Perl_croak(aTHX_ "No code specified for -%c", c);
1783 sv_catpvs(PL_e_script, "\n");
1787 #ifdef USE_SITECUSTOMIZE
1793 case 'I': /* -I handled both here and in moreswitches() */
1794 forbid_setid('I', FALSE);
1795 if (!*++s && (s=argv[1]) != NULL) {
1799 STRLEN len = strlen(s);
1800 const char * const p = savepvn(s, len);
1801 incpush(p, TRUE, TRUE, FALSE, FALSE);
1802 sv_catpvs(sv, "-I");
1803 sv_catpvn(sv, p, len);
1808 Perl_croak(aTHX_ "No directory specified for -I");
1811 forbid_setid('S', FALSE);
1819 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1821 /* Can't do newSVpvs() as that would involve pre-processor
1822 condititionals inside a macro expansion. */
1823 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1830 # ifdef PERL_DONT_CREATE_GVSV
1831 " PERL_DONT_CREATE_GVSV"
1833 # ifdef PERL_MALLOC_WRAP
1836 # ifdef PERL_MEM_LOG
1839 # ifdef PERL_MEM_LOG_ENV
1842 # ifdef PERL_MEM_LOG_ENV_FD
1843 " PERL_MEM_LOG_ENV_FD"
1845 # ifdef PERL_MEM_LOG_STDERR
1846 " PERL_MEM_LOG_STDERR"
1848 # ifdef PERL_MEM_LOG_TIMESTAMP
1849 " PERL_MEM_LOG_TIMESTAMP"
1851 # ifdef PERL_USE_SAFE_PUTENV
1852 " PERL_USE_SAFE_PUTENV"
1854 # ifdef USE_SITECUSTOMIZE
1855 " USE_SITECUSTOMIZE"
1859 sv_catpv(opts_prog, PL_bincompat_options);
1860 /* Terminate the qw(, and then wrap at 76 columns. */
1861 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1863 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1865 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1868 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1870 #if defined(LOCAL_PATCH_COUNT)
1871 if (LOCAL_PATCH_COUNT > 0) {
1873 sv_catpvs(opts_prog,
1874 "\" Locally applied patches:\\n\",");
1875 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1876 if (PL_localpatches[i])
1877 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1878 0, PL_localpatches[i], 0);
1882 Perl_sv_catpvf(aTHX_ opts_prog,
1883 "\" Built under %s\\n",OSNAME);
1886 sv_catpvs(opts_prog,
1887 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1889 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1892 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1893 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1894 "sort grep {/^PERL/} keys %ENV; ");
1896 sv_catpvs(opts_prog,
1897 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1899 sv_catpvs(opts_prog,
1900 "print \" \\%ENV:\\n @env\\n\" if @env;"
1901 "print \" \\@INC:\\n @INC\\n\";");
1905 opts_prog = Perl_newSVpvf(aTHX_
1906 "Config::config_vars(qw%c%s%c)",
1910 av_push(PL_preambleav, opts_prog);
1911 /* don't look for script or read stdin */
1912 scriptname = BIT_BUCKET;
1916 PL_doextract = TRUE;
1924 if (!*++s || isSPACE(*s)) {
1928 /* catch use of gnu style long options */
1929 if (strEQ(s, "version")) {
1933 if (strEQ(s, "help")) {
1940 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1951 #ifndef SECURE_INTERNAL_GETENV
1954 (s = PerlEnv_getenv("PERL5OPT")))
1956 const char *popt = s;
1959 if (*s == '-' && *(s+1) == 'T') {
1960 CHECK_MALLOC_TOO_LATE_FOR('T');
1962 PL_taint_warn = FALSE;
1965 char *popt_copy = NULL;
1978 if (!strchr("CDIMUdmtw", *s))
1979 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1983 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1984 s = popt_copy + (s - popt);
1985 d = popt_copy + (d - popt);
1992 if( !PL_tainting ) {
1993 PL_taint_warn = TRUE;
2004 #ifdef USE_SITECUSTOMIZE
2006 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2007 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2012 scriptname = argv[0];
2015 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2017 else if (scriptname == NULL) {
2019 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2025 /* Set $^X early so that it can be used for relocatable paths in @INC */
2026 assert (!PL_tainted);
2028 S_set_caret_X(aTHX);
2033 bool suidscript = FALSE;
2035 = open_script(scriptname, dosearch, &suidscript, &rsfp);
2037 validate_suid(validarg, scriptname, fdscript, suidscript,
2041 # if defined(SIGCHLD) || defined(SIGCLD)
2044 # define SIGCHLD SIGCLD
2046 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2047 if (sigstate == (Sighandler_t) SIG_IGN) {
2048 if (ckWARN(WARN_SIGNAL))
2049 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2050 "Can't ignore signal CHLD, forcing to default");
2051 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2058 #ifdef MACOS_TRADITIONAL
2059 || gMacPerl_AlwaysExtract
2063 /* This will croak if suidscript is true, as -x cannot be used with
2065 forbid_setid('x', suidscript);
2066 /* Hence you can't get here if suidscript is true */
2068 find_beginning(linestr_sv, rsfp);
2069 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2070 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2074 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2075 CvUNIQUE_on(PL_compcv);
2077 CvPADLIST(PL_compcv) = pad_new(0);
2079 PL_isarev = newHV();
2082 boot_core_UNIVERSAL();
2083 boot_core_xsutils();
2087 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2089 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2095 # ifdef HAS_SOCKS5_INIT
2096 socks5_init(argv[0]);
2102 init_predump_symbols();
2103 /* init_postdump_symbols not currently designed to be called */
2104 /* more than once (ENV isn't cleared first, for example) */
2105 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2107 init_postdump_symbols(argc,argv,env);
2109 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2110 * or explicitly in some platforms.
2111 * locale.c:Perl_init_i18nl10n() if the environment
2112 * look like the user wants to use UTF-8. */
2113 #if defined(__SYMBIAN32__)
2114 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2117 /* Requires init_predump_symbols(). */
2118 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2123 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2124 * and the default open disciplines. */
2125 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2126 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2128 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2129 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2130 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2132 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2133 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2134 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2136 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2137 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2138 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2140 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2141 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2144 sv_setpvn(sv, ":utf8\0:utf8", 11);
2146 sv_setpvn(sv, ":utf8\0", 6);
2149 sv_setpvn(sv, "\0:utf8", 6);
2157 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2158 if (strEQ(s, "unsafe"))
2159 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2160 else if (strEQ(s, "safe"))
2161 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2163 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2170 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2174 PL_xmlfp = PerlIO_stdout();
2176 PL_xmlfp = PerlIO_open(s, "w");
2178 Perl_croak(aTHX_ "Can't open %s", s);
2180 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2186 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2187 PL_madskills = atoi(s);
2188 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2193 lex_start(linestr_sv, rsfp, TRUE);
2194 PL_subname = newSVpvs("main");
2196 if (add_read_e_script)
2197 filter_add(read_e_script, NULL);
2199 /* now parse the script */
2201 SETERRNO(0,SS_NORMAL);
2202 #ifdef MACOS_TRADITIONAL
2203 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2205 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2207 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2208 MacPerl_MPWFileName(PL_origfilename));
2212 if (yyparse() || PL_parser->error_count) {
2214 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2216 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2221 CopLINE_set(PL_curcop, 0);
2222 PL_curstash = PL_defstash;
2224 SvREFCNT_dec(PL_e_script);
2232 SAVECOPFILE(PL_curcop);
2233 SAVECOPLINE(PL_curcop);
2234 gv_check(PL_defstash);
2243 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2244 dump_mstats("after compilation:");
2254 =for apidoc perl_run
2256 Tells a Perl interpreter to run. See L<perlembed>.
2269 PERL_UNUSED_ARG(my_perl);
2271 oldscope = PL_scopestack_ix;
2279 cxstack_ix = -1; /* start context stack again */
2281 case 0: /* normal completion */
2285 case 2: /* my_exit() */
2286 while (PL_scopestack_ix > oldscope)
2289 PL_curstash = PL_defstash;
2290 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2291 PL_endav && !PL_minus_c)
2292 call_list(oldscope, PL_endav);
2294 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2295 dump_mstats("after execution: ");
2301 POPSTACK_TO(PL_mainstack);
2304 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2315 S_run_body(pTHX_ I32 oldscope)
2318 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2319 PL_sawampersand ? "Enabling" : "Omitting"));
2321 if (!PL_restartop) {
2325 exit(0); /* less likely to core dump than my_exit(0) */
2328 DEBUG_x(dump_all());
2331 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2333 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2337 #ifdef MACOS_TRADITIONAL
2338 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2339 (gMacPerl_ErrorFormat ? "# " : ""),
2340 MacPerl_MPWFileName(PL_origfilename));
2342 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2346 if (PERLDB_SINGLE && PL_DBsingle)
2347 sv_setiv(PL_DBsingle, 1);
2349 call_list(oldscope, PL_initav);
2350 #ifdef PERL_DEBUG_READONLY_OPS
2351 Perl_pending_Slabs_to_ro(aTHX);
2358 PL_op = PL_restartop;
2362 else if (PL_main_start) {
2363 CvDEPTH(PL_main_cv) = 1;
2364 PL_op = PL_main_start;
2372 =head1 SV Manipulation Functions
2374 =for apidoc p||get_sv
2376 Returns the SV of the specified Perl scalar. If C<create> is set and the
2377 Perl variable does not exist then it will be created. If C<create> is not
2378 set and the variable does not exist then NULL is returned.
2384 Perl_get_sv(pTHX_ const char *name, I32 create)
2387 gv = gv_fetchpv(name, create, SVt_PV);
2394 =head1 Array Manipulation Functions
2396 =for apidoc p||get_av
2398 Returns the AV of the specified Perl array. If C<create> is set and the
2399 Perl variable does not exist then it will be created. If C<create> is not
2400 set and the variable does not exist then NULL is returned.
2406 Perl_get_av(pTHX_ const char *name, I32 create)
2408 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2417 =head1 Hash Manipulation Functions
2419 =for apidoc p||get_hv
2421 Returns the HV of the specified Perl hash. If C<create> is set and the
2422 Perl variable does not exist then it will be created. If C<create> is not
2423 set and the variable does not exist then NULL is returned.
2429 Perl_get_hv(pTHX_ const char *name, I32 create)
2431 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2440 =head1 CV Manipulation Functions
2442 =for apidoc p||get_cvn_flags
2444 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2445 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2446 exist then it will be declared (which has the same effect as saying
2447 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2448 then NULL is returned.
2450 =for apidoc p||get_cv
2452 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2458 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2460 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2461 /* XXX this is probably not what they think they're getting.
2462 * It has the same effect as "sub name;", i.e. just a forward
2464 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2465 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2466 return newSUB(start_subparse(FALSE, 0),
2467 newSVOP(OP_CONST, 0, sv),
2476 Perl_get_cv(pTHX_ const char *name, I32 flags)
2478 return get_cvn_flags(name, strlen(name), flags);
2481 /* Be sure to refetch the stack pointer after calling these routines. */
2485 =head1 Callback Functions
2487 =for apidoc p||call_argv
2489 Performs a callback to the specified Perl sub. See L<perlcall>.
2495 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2497 /* See G_* flags in cop.h */
2498 /* null terminated arg list */
2506 mXPUSHs(newSVpv(*argv,0));
2511 return call_pv(sub_name, flags);
2515 =for apidoc p||call_pv
2517 Performs a callback to the specified Perl sub. See L<perlcall>.
2523 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2524 /* name of the subroutine */
2525 /* See G_* flags in cop.h */
2527 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2531 =for apidoc p||call_method
2533 Performs a callback to the specified Perl method. The blessed object must
2534 be on the stack. See L<perlcall>.
2540 Perl_call_method(pTHX_ const char *methname, I32 flags)
2541 /* name of the subroutine */
2542 /* See G_* flags in cop.h */
2544 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2547 /* May be called with any of a CV, a GV, or an SV containing the name. */
2549 =for apidoc p||call_sv
2551 Performs a callback to the Perl sub whose name is in the SV. See
2558 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2559 /* See G_* flags in cop.h */
2562 LOGOP myop; /* fake syntax tree node */
2567 bool oldcatch = CATCH_GET;
2569 OP* const oldop = PL_op;
2572 if (flags & G_DISCARD) {
2577 Zero(&myop, 1, LOGOP);
2578 myop.op_next = NULL;
2579 if (!(flags & G_NOARGS))
2580 myop.op_flags |= OPf_STACKED;
2581 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2582 (flags & G_ARRAY) ? OPf_WANT_LIST :
2587 EXTEND(PL_stack_sp, 1);
2588 *++PL_stack_sp = sv;
2590 oldscope = PL_scopestack_ix;
2592 if (PERLDB_SUB && PL_curstash != PL_debstash
2593 /* Handle first BEGIN of -d. */
2594 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2595 /* Try harder, since this may have been a sighandler, thus
2596 * curstash may be meaningless. */
2597 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2598 && !(flags & G_NODEBUG))
2599 PL_op->op_private |= OPpENTERSUB_DB;
2601 if (flags & G_METHOD) {
2602 Zero(&method_op, 1, UNOP);
2603 method_op.op_next = PL_op;
2604 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2605 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2606 PL_op = (OP*)&method_op;
2609 if (!(flags & G_EVAL)) {
2611 CALL_BODY_SUB((OP*)&myop);
2612 retval = PL_stack_sp - (PL_stack_base + oldmark);
2613 CATCH_SET(oldcatch);
2616 myop.op_other = (OP*)&myop;
2618 create_eval_scope(flags|G_FAKINGEVAL);
2626 CALL_BODY_SUB((OP*)&myop);
2627 retval = PL_stack_sp - (PL_stack_base + oldmark);
2628 if (!(flags & G_KEEPERR))
2629 sv_setpvn(ERRSV,"",0);
2635 /* my_exit() was called */
2636 PL_curstash = PL_defstash;
2639 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2640 Perl_croak(aTHX_ "Callback called exit");
2645 PL_op = PL_restartop;
2649 PL_stack_sp = PL_stack_base + oldmark;
2650 if (flags & G_ARRAY)
2654 *++PL_stack_sp = &PL_sv_undef;
2659 if (PL_scopestack_ix > oldscope)
2660 delete_eval_scope();
2664 if (flags & G_DISCARD) {
2665 PL_stack_sp = PL_stack_base + oldmark;
2674 /* Eval a string. The G_EVAL flag is always assumed. */
2677 =for apidoc p||eval_sv
2679 Tells Perl to C<eval> the string in the SV.
2685 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2687 /* See G_* flags in cop.h */
2691 UNOP myop; /* fake syntax tree node */
2692 VOL I32 oldmark = SP - PL_stack_base;
2695 OP* const oldop = PL_op;
2698 if (flags & G_DISCARD) {
2705 Zero(PL_op, 1, UNOP);
2706 EXTEND(PL_stack_sp, 1);
2707 *++PL_stack_sp = sv;
2709 if (!(flags & G_NOARGS))
2710 myop.op_flags = OPf_STACKED;
2711 myop.op_next = NULL;
2712 myop.op_type = OP_ENTEREVAL;
2713 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2714 (flags & G_ARRAY) ? OPf_WANT_LIST :
2716 if (flags & G_KEEPERR)
2717 myop.op_flags |= OPf_SPECIAL;
2719 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2720 * before a PUSHEVAL, which corrupts the stack after a croak */
2721 TAINT_PROPER("eval_sv()");
2727 CALL_BODY_EVAL((OP*)&myop);
2728 retval = PL_stack_sp - (PL_stack_base + oldmark);
2729 if (!(flags & G_KEEPERR))
2730 sv_setpvn(ERRSV,"",0);
2736 /* my_exit() was called */
2737 PL_curstash = PL_defstash;
2740 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2741 Perl_croak(aTHX_ "Callback called exit");
2746 PL_op = PL_restartop;
2750 PL_stack_sp = PL_stack_base + oldmark;
2751 if (flags & G_ARRAY)
2755 *++PL_stack_sp = &PL_sv_undef;
2761 if (flags & G_DISCARD) {
2762 PL_stack_sp = PL_stack_base + oldmark;
2772 =for apidoc p||eval_pv
2774 Tells Perl to C<eval> the given string and return an SV* result.
2780 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2784 SV* sv = newSVpv(p, 0);
2786 eval_sv(sv, G_SCALAR);
2793 if (croak_on_error && SvTRUE(ERRSV)) {
2794 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2800 /* Require a module. */
2803 =head1 Embedding Functions
2805 =for apidoc p||require_pv
2807 Tells Perl to C<require> the file named by the string argument. It is
2808 analogous to the Perl code C<eval "require '$file'">. It's even
2809 implemented that way; consider using load_module instead.
2814 Perl_require_pv(pTHX_ const char *pv)
2819 PUSHSTACKi(PERLSI_REQUIRE);
2821 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2822 eval_sv(sv_2mortal(sv), G_DISCARD);
2828 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2830 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2833 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2837 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2839 /* This message really ought to be max 23 lines.
2840 * Removed -h because the user already knows that option. Others? */
2842 static const char * const usage_msg[] = {
2843 "-0[octal] specify record separator (\\0, if no argument)",
2844 "-a autosplit mode with -n or -p (splits $_ into @F)",
2845 "-C[number/list] enables the listed Unicode features",
2846 "-c check syntax only (runs BEGIN and CHECK blocks)",
2847 "-d[:debugger] run program under debugger",
2848 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2849 "-e program one line of program (several -e's allowed, omit programfile)",
2850 "-E program like -e, but enables all optional features",
2851 "-f don't do $sitelib/sitecustomize.pl at startup",
2852 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2853 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2854 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2855 "-l[octal] enable line ending processing, specifies line terminator",
2856 "-[mM][-]module execute \"use/no module...\" before executing program",
2857 "-n assume \"while (<>) { ... }\" loop around program",
2858 "-p assume loop like -n but print line also, like sed",
2859 "-s enable rudimentary parsing for switches after programfile",
2860 "-S look for programfile using PATH environment variable",
2861 "-t enable tainting warnings",
2862 "-T enable tainting checks",
2863 "-u dump core after parsing program",
2864 "-U allow unsafe operations",
2865 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2866 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2867 "-w enable many useful warnings (RECOMMENDED)",
2868 "-W enable all warnings",
2869 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2870 "-X disable all warnings",
2874 const char * const *p = usage_msg;
2876 PerlIO_printf(PerlIO_stdout(),
2877 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2880 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2883 /* convert a string of -D options (or digits) into an int.
2884 * sets *s to point to the char after the options */
2888 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2890 static const char * const usage_msgd[] = {
2891 " Debugging flag values: (see also -d)",
2892 " p Tokenizing and parsing (with v, displays parse stack)",
2893 " s Stack snapshots (with v, displays all stacks)",
2894 " l Context (loop) stack processing",
2895 " t Trace execution",
2896 " o Method and overloading resolution",
2897 " c String/numeric conversions",
2898 " P Print profiling info, source file input state",
2899 " m Memory allocation",
2900 " f Format processing",
2901 " r Regular expression parsing and execution",
2902 " x Syntax tree dump",
2903 " u Tainting checks",
2904 " H Hash dump -- usurps values()",
2905 " X Scratchpad allocation",
2907 " S Thread synchronization",
2909 " R Include reference counts of dumped variables (eg when using -Ds)",
2910 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2911 " v Verbose: use in conjunction with other flags",
2913 " A Consistency checks on internal structures",
2914 " q quiet - currently only suppresses the 'EXECUTING' message",
2919 /* if adding extra options, remember to update DEBUG_MASK */
2920 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2922 for (; isALNUM(**s); (*s)++) {
2923 const char * const d = strchr(debopts,**s);
2925 i |= 1 << (d - debopts);
2926 else if (ckWARN_d(WARN_DEBUGGING))
2927 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2928 "invalid option -D%c, use -D'' to see choices\n", **s);
2931 else if (isDIGIT(**s)) {
2933 for (; isALNUM(**s); (*s)++) ;
2935 else if (givehelp) {
2936 const char *const *p = usage_msgd;
2937 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2940 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2941 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2942 "-Dp not implemented on this platform\n");
2948 /* This routine handles any switches that can be given during run */
2951 Perl_moreswitches(pTHX_ const char *s)
2962 SvREFCNT_dec(PL_rs);
2963 if (s[1] == 'x' && s[2]) {
2964 const char *e = s+=2;
2970 flags = PERL_SCAN_SILENT_ILLDIGIT;
2971 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2972 if (s + numlen < e) {
2973 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2977 PL_rs = newSVpvs("");
2978 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2979 tmps = (U8*)SvPVX(PL_rs);
2980 uvchr_to_utf8(tmps, rschar);
2981 SvCUR_set(PL_rs, UNISKIP(rschar));
2986 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2987 if (rschar & ~((U8)~0))
2988 PL_rs = &PL_sv_undef;
2989 else if (!rschar && numlen >= 2)
2990 PL_rs = newSVpvs("");
2992 char ch = (char)rschar;
2993 PL_rs = newSVpvn(&ch, 1);
2996 sv_setsv(get_sv("/", TRUE), PL_rs);
3001 PL_unicode = parse_unicode_opts( (const char **)&s );
3002 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3008 while (*s && !isSPACE(*s)) ++s;
3009 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3020 forbid_setid('d', FALSE);
3023 /* -dt indicates to the debugger that threads will be used */
3024 if (*s == 't' && !isALNUM(s[1])) {
3026 my_setenv("PERL5DB_THREADED", "1");
3029 /* The following permits -d:Mod to accepts arguments following an =
3030 in the fashion that -MSome::Mod does. */
3031 if (*s == ':' || *s == '=') {
3032 const char *start = ++s;
3033 const char *const end = s + strlen(s);
3034 SV * const sv = newSVpvs("use Devel::");
3036 /* We now allow -d:Module=Foo,Bar */
3037 while(isALNUM(*s) || *s==':') ++s;
3039 sv_catpvn(sv, start, end - start);
3041 sv_catpvn(sv, start, s-start);
3042 /* Don't use NUL as q// delimiter here, this string goes in the
3044 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3047 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3051 PL_perldb = PERLDB_ALL;
3058 forbid_setid('D', FALSE);
3060 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3061 #else /* !DEBUGGING */
3062 if (ckWARN_d(WARN_DEBUGGING))
3063 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3064 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3065 for (s++; isALNUM(*s); s++) ;
3070 usage(PL_origargv[0]);
3073 Safefree(PL_inplace);
3074 #if defined(__CYGWIN__) /* do backup extension automagically */
3075 if (*(s+1) == '\0') {
3076 PL_inplace = savepvs(".bak");
3079 #endif /* __CYGWIN__ */
3081 const char * const start = ++s;
3082 while (*s && !isSPACE(*s))
3085 PL_inplace = savepvn(start, s - start);
3089 if (*s == '-') /* Additional switches on #! line. */
3093 case 'I': /* -I handled both here and in parse_body() */
3094 forbid_setid('I', FALSE);
3096 while (*s && isSPACE(*s))
3101 /* ignore trailing spaces (possibly followed by other switches) */
3103 for (e = p; *e && !isSPACE(*e); e++) ;
3107 } while (*p && *p != '-');
3108 e = savepvn(s, e-s);
3109 incpush(e, TRUE, TRUE, FALSE, FALSE);
3116 Perl_croak(aTHX_ "No directory specified for -I");
3122 SvREFCNT_dec(PL_ors_sv);
3128 PL_ors_sv = newSVpvs("\n");
3129 numlen = 3 + (*s == '0');
3130 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3134 if (RsPARA(PL_rs)) {
3135 PL_ors_sv = newSVpvs("\n\n");
3138 PL_ors_sv = newSVsv(PL_rs);
3143 forbid_setid('M', FALSE); /* XXX ? */
3146 forbid_setid('m', FALSE); /* XXX ? */
3151 const char *use = "use ";
3152 /* -M-foo == 'no foo' */
3153 /* Leading space on " no " is deliberate, to make both
3154 possibilities the same length. */
3155 if (*s == '-') { use = " no "; ++s; }
3156 sv = newSVpvn(use,4);
3158 /* We allow -M'Module qw(Foo Bar)' */
3159 while(isALNUM(*s) || *s==':') ++s;
3160 end = s + strlen(s);
3162 sv_catpvn(sv, start, end - start);
3163 if (*(start-1) == 'm') {
3165 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3166 sv_catpvs( sv, " ()");
3170 Perl_croak(aTHX_ "Module name required with -%c option",
3172 sv_catpvn(sv, start, s-start);
3173 /* Use NUL as q''-delimiter. */
3174 sv_catpvs(sv, " split(/,/,q\0");
3176 sv_catpvn(sv, s, end - s);
3177 sv_catpvs(sv, "\0)");
3180 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3183 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3194 forbid_setid('s', FALSE);
3195 PL_doswitches = TRUE;
3209 #ifdef MACOS_TRADITIONAL
3210 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3212 PL_do_undump = TRUE;
3220 if (!sv_derived_from(PL_patchlevel, "version"))
3221 upg_version(PL_patchlevel, TRUE);
3223 PerlIO_printf(PerlIO_stdout(),
3224 Perl_form(aTHX_ "\nThis is perl, %"SVf
3225 #ifdef PERL_PATCHNUM
3226 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3229 SVfARG(vstringify(PL_patchlevel)),
3232 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3233 PerlIO_printf(PerlIO_stdout(),
3234 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3235 SVfARG(vstringify(PL_patchlevel))));
3236 PerlIO_printf(PerlIO_stdout(),
3237 Perl_form(aTHX_ " built under %s at %s %s\n",
3238 OSNAME, __DATE__, __TIME__));
3239 PerlIO_printf(PerlIO_stdout(),
3240 Perl_form(aTHX_ " OS Specific Release: %s\n",
3244 #if defined(LOCAL_PATCH_COUNT)
3245 if (LOCAL_PATCH_COUNT > 0)
3246 PerlIO_printf(PerlIO_stdout(),
3247 "\n(with %d registered patch%s, "
3248 "see perl -V for more detail)",
3250 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3253 PerlIO_printf(PerlIO_stdout(),
3254 "\n\nCopyright 1987-2007, Larry Wall\n");
3255 #ifdef MACOS_TRADITIONAL
3256 PerlIO_printf(PerlIO_stdout(),
3257 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3258 "maintained by Chris Nandor\n");
3261 PerlIO_printf(PerlIO_stdout(),
3262 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3265 PerlIO_printf(PerlIO_stdout(),
3266 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3267 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3272 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "atariST series port, ++jrb bammi@cadence.com\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3291 PerlIO_printf(PerlIO_stdout(),
3292 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3303 PerlIO_printf(PerlIO_stdout(),
3304 "MiNT port by Guido Flohr, 1997-1999\n");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "EPOC port by Olaf Flebbe, 1999-2002\n");
3311 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3312 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3315 #ifdef __SYMBIAN32__
3316 PerlIO_printf(PerlIO_stdout(),
3317 "Symbian port by Nokia, 2004-2005\n");
3319 #ifdef BINARY_BUILD_NOTICE
3320 BINARY_BUILD_NOTICE;
3322 PerlIO_printf(PerlIO_stdout(),
3324 Perl may be copied only under the terms of either the Artistic License or the\n\
3325 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3326 Complete documentation for Perl, including FAQ lists, should be found on\n\
3327 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3328 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3331 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3332 PL_dowarn |= G_WARN_ON;
3337 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3338 if (!specialWARN(PL_compiling.cop_warnings))
3339 PerlMemShared_free(PL_compiling.cop_warnings);
3340 PL_compiling.cop_warnings = pWARN_ALL ;
3344 PL_dowarn = G_WARN_ALL_OFF;
3345 if (!specialWARN(PL_compiling.cop_warnings))
3346 PerlMemShared_free(PL_compiling.cop_warnings);
3347 PL_compiling.cop_warnings = pWARN_NONE ;
3352 if (s[1] == '-') /* Additional switches on #! line. */
3357 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3363 #ifdef ALTERNATE_SHEBANG
3364 case 'S': /* OS/2 needs -S on "extproc" line. */
3368 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3373 /* compliments of Tom Christiansen */
3375 /* unexec() can be found in the Gnu emacs distribution */
3376 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3379 Perl_my_unexec(pTHX)
3381 PERL_UNUSED_CONTEXT;
3383 SV * prog = newSVpv(BIN_EXP, 0);
3384 SV * file = newSVpv(PL_origfilename, 0);
3388 sv_catpvs(prog, "/perl");
3389 sv_catpvs(file, ".perldump");
3391 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3392 /* unexec prints msg to stderr in case of failure */
3393 PerlProc_exit(status);
3396 # include <lib$routines.h>
3397 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3398 # elif defined(WIN32) || defined(__CYGWIN__)
3399 Perl_croak(aTHX_ "dump is not supported");
3401 ABORT(); /* for use with undump */
3406 /* initialize curinterp */
3412 # define PERLVAR(var,type)
3413 # define PERLVARA(var,n,type)
3414 # if defined(PERL_IMPLICIT_CONTEXT)
3415 # define PERLVARI(var,type,init) aTHX->var = init;
3416 # define PERLVARIC(var,type,init) aTHX->var = init;
3418 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3419 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3421 # include "intrpvar.h"
3427 # define PERLVAR(var,type)
3428 # define PERLVARA(var,n,type)
3429 # define PERLVARI(var,type,init) PL_##var = init;
3430 # define PERLVARIC(var,type,init) PL_##var = init;
3431 # include "intrpvar.h"
3438 /* As these are inside a structure, PERLVARI isn't capable of initialising
3440 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3441 PL_reg_poscache = PL_reg_starttry = NULL;
3445 S_init_main_stash(pTHX)
3450 PL_curstash = PL_defstash = newHV();
3451 /* We know that the string "main" will be in the global shared string
3452 table, so it's a small saving to use it rather than allocate another
3454 PL_curstname = newSVpvs_share("main");
3455 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3456 /* If we hadn't caused another reference to "main" to be in the shared
3457 string table above, then it would be worth reordering these two,
3458 because otherwise all we do is delete "main" from it as a consequence
3459 of the SvREFCNT_dec, only to add it again with hv_name_set */
3460 SvREFCNT_dec(GvHV(gv));
3461 hv_name_set(PL_defstash, "main", 4, 0);
3462 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3464 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3466 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3467 GvMULTI_on(PL_incgv);
3468 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3469 GvMULTI_on(PL_hintgv);
3470 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3471 SvREFCNT_inc_simple_void(PL_defgv);
3472 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3473 SvREFCNT_inc_simple_void(PL_errgv);
3474 GvMULTI_on(PL_errgv);
3475 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3476 GvMULTI_on(PL_replgv);
3477 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3478 #ifdef PERL_DONT_CREATE_GVSV
3481 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3482 sv_setpvn(ERRSV, "", 0);
3483 PL_curstash = PL_defstash;
3484 CopSTASH_set(&PL_compiling, PL_defstash);
3485 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3486 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3488 /* We must init $/ before switches are processed. */
3489 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3493 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3494 bool *suidscript, PerlIO **rsfpp)
3500 PL_origfilename = savepvs("-e");
3503 /* if find_script() returns, it returns a malloc()-ed value */
3504 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3506 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3507 const char *s = scriptname + 8;
3513 * Tell apart "normal" usage of fdscript, e.g.
3514 * with bash on FreeBSD:
3515 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3516 * from usage in suidperl.
3517 * Does any "normal" usage leave garbage after the number???
3518 * Is it a mistake to use a similar /dev/fd/ construct for
3523 * Be supersafe and do some sanity-checks.
3524 * Still, can we be sure we got the right thing?
3527 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3530 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3532 scriptname = savepv(s + 1);
3533 Safefree(PL_origfilename);
3534 PL_origfilename = (char *)scriptname;
3539 CopFILE_free(PL_curcop);
3540 CopFILE_set(PL_curcop, PL_origfilename);
3541 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3542 scriptname = (char *)"";
3543 if (fdscript >= 0) {
3544 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3545 # if defined(HAS_FCNTL) && defined(F_SETFD)
3547 /* ensure close-on-exec */
3548 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3553 Perl_croak(aTHX_ "sperl needs fd script\n"
3554 "You should not call sperl directly; do you need to "
3555 "change a #! line\nfrom sperl to perl?\n");
3558 * Do not open (or do other fancy stuff) while setuid.
3559 * Perl does the open, and hands script to suidperl on a fd;
3560 * suidperl only does some checks, sets up UIDs and re-execs
3561 * perl with that fd as it has always done.
3565 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3568 else if (!*scriptname) {
3569 forbid_setid(0, *suidscript);
3570 *rsfpp = PerlIO_stdin();
3573 #ifdef FAKE_BIT_BUCKET
3574 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3575 * is called) and still have the "-e" work. (Believe it or not,
3576 * a /dev/null is required for the "-e" to work because source
3577 * filter magic is used to implement it. ) This is *not* a general
3578 * replacement for a /dev/null. What we do here is create a temp
3579 * file (an empty file), open up that as the script, and then
3580 * immediately close and unlink it. Close enough for jazz. */
3581 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3582 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3583 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3584 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3585 FAKE_BIT_BUCKET_TEMPLATE
3587 const char * const err = "Failed to create a fake bit bucket";
3588 if (strEQ(scriptname, BIT_BUCKET)) {
3589 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3590 int tmpfd = mkstemp(tmpname);
3592 scriptname = tmpname;
3595 Perl_croak(aTHX_ err);
3598 scriptname = mktemp(tmpname);
3600 Perl_croak(aTHX_ err);
3605 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3606 #ifdef FAKE_BIT_BUCKET
3607 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3608 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3609 && strlen(scriptname) == sizeof(tmpname) - 1) {
3612 scriptname = BIT_BUCKET;
3614 # if defined(HAS_FCNTL) && defined(F_SETFD)
3616 /* ensure close-on-exec */
3617 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3620 #endif /* IAMSUID */
3622 /* PSz 16 Sep 03 Keep neat error message */
3624 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3626 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3627 CopFILE(PL_curcop), Strerror(errno));
3633 * I_SYSSTATVFS HAS_FSTATVFS
3635 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3636 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3637 * here so that metaconfig picks them up. */
3641 S_fd_on_nosuid_fs(pTHX_ int fd)
3644 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3645 * but is needed also on machines without setreuid.
3646 * Seems safe enough to run as root.
3648 int check_okay = 0; /* able to do all the required sys/libcalls */
3649 int on_nosuid = 0; /* the fd is on a nosuid fs */
3651 * Need to check noexec also: nosuid might not be set, the average
3652 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3654 int on_noexec = 0; /* the fd is on a noexec fs */
3657 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3658 * fstatvfs() is UNIX98.
3659 * fstatfs() is 4.3 BSD.
3660 * ustat()+getmnt() is pre-4.3 BSD.
3661 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3662 * an irrelevant filesystem while trying to reach the right one.
3665 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3667 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3668 defined(HAS_FSTATVFS)
3669 # define FD_ON_NOSUID_CHECK_OKAY
3670 struct statvfs stfs;
3672 check_okay = fstatvfs(fd, &stfs) == 0;
3673 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3675 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3676 on platforms where it is present. */
3677 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3679 # endif /* fstatvfs */
3681 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3682 defined(PERL_MOUNT_NOSUID) && \
3683 defined(PERL_MOUNT_NOEXEC) && \
3684 defined(HAS_FSTATFS) && \
3685 defined(HAS_STRUCT_STATFS) && \
3686 defined(HAS_STRUCT_STATFS_F_FLAGS)
3687 # define FD_ON_NOSUID_CHECK_OKAY
3690 check_okay = fstatfs(fd, &stfs) == 0;
3691 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3692 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3693 # endif /* fstatfs */
3695 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3696 defined(PERL_MOUNT_NOSUID) && \
3697 defined(PERL_MOUNT_NOEXEC) && \
3698 defined(HAS_FSTAT) && \
3699 defined(HAS_USTAT) && \
3700 defined(HAS_GETMNT) && \
3701 defined(HAS_STRUCT_FS_DATA) && \
3703 # define FD_ON_NOSUID_CHECK_OKAY
3706 if (fstat(fd, &fdst) == 0) {
3708 if (ustat(fdst.st_dev, &us) == 0) {
3710 /* NOSTAT_ONE here because we're not examining fields which
3711 * vary between that case and STAT_ONE. */
3712 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3713 size_t cmplen = sizeof(us.f_fname);
3714 if (sizeof(fsd.fd_req.path) < cmplen)
3715 cmplen = sizeof(fsd.fd_req.path);
3716 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3717 fdst.st_dev == fsd.fd_req.dev) {
3719 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3720 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3725 # endif /* fstat+ustat+getmnt */
3727 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3728 defined(HAS_GETMNTENT) && \
3729 defined(HAS_HASMNTOPT) && \
3730 defined(MNTOPT_NOSUID) && \
3731 defined(MNTOPT_NOEXEC)
3732 # define FD_ON_NOSUID_CHECK_OKAY
3733 FILE *mtab = fopen("/etc/mtab", "r");
3734 struct mntent *entry;
3737 if (mtab && (fstat(fd, &stb) == 0)) {
3738 while (entry = getmntent(mtab)) {
3739 if (stat(entry->mnt_dir, &fsb) == 0
3740 && fsb.st_dev == stb.st_dev)
3742 /* found the filesystem */
3744 if (hasmntopt(entry, MNTOPT_NOSUID))
3746 if (hasmntopt(entry, MNTOPT_NOEXEC))
3749 } /* A single fs may well fail its stat(). */
3754 # endif /* getmntent+hasmntopt */
3757 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3759 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3761 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3762 return ((!check_okay) || on_nosuid || on_noexec);
3764 #endif /* IAMSUID */
3768 S_validate_suid(pTHX_ const char *validarg,
3770 const char *scriptname,
3776 SV *linestr_sv, PerlIO *rsfp)
3781 /* do we need to emulate setuid on scripts? */
3783 /* This code is for those BSD systems that have setuid #! scripts disabled
3784 * in the kernel because of a security problem. Merely defining DOSUID
3785 * in perl will not fix that problem, but if you have disabled setuid
3786 * scripts in the kernel, this will attempt to emulate setuid and setgid
3787 * on scripts that have those now-otherwise-useless bits set. The setuid
3788 * root version must be called suidperl or sperlN.NNN. If regular perl
3789 * discovers that it has opened a setuid script, it calls suidperl with
3790 * the same argv that it had. If suidperl finds that the script it has
3791 * just opened is NOT setuid root, it sets the effective uid back to the
3792 * uid. We don't just make perl setuid root because that loses the
3793 * effective uid we had before invoking perl, if it was different from the
3796 * Description/comments above do not match current workings:
3797 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3798 * suidperl called with script open and name changed to /dev/fd/N/X;
3799 * suidperl croaks if script is not setuid;
3800 * making perl setuid would be a huge security risk (and yes, that
3801 * would lose any euid we might have had).
3803 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3804 * be defined in suidperl only. suidperl must be setuid root. The
3805 * Configure script will set this up for you if you want it.
3808 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3809 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3810 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3812 const char *linestr;
3816 if (fdscript < 0 || !suidscript)
3817 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3819 * Since the script is opened by perl, not suidperl, some of these
3820 * checks are superfluous. Leaving them in probably does not lower
3824 * Do checks even for systems with no HAS_SETREUID.
3825 * We used to swap, then re-swap UIDs with
3826 # ifdef HAS_SETREUID
3827 if (setreuid(PL_euid,PL_uid) < 0
3828 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3829 Perl_croak(aTHX_ "Can't swap uid and euid");
3831 # ifdef HAS_SETREUID
3832 if (setreuid(PL_uid,PL_euid) < 0
3833 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3834 Perl_croak(aTHX_ "Can't reswap uid and euid");
3838 /* On this access check to make sure the directories are readable,
3839 * there is actually a small window that the user could use to make
3840 * filename point to an accessible directory. So there is a faint
3841 * chance that someone could execute a setuid script down in a
3842 * non-accessible directory. I don't know what to do about that.
3843 * But I don't think it's too important. The manual lies when
3844 * it says access() is useful in setuid programs.
3846 * So, access() is pretty useless... but not harmful... do anyway.
3848 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3849 Perl_croak(aTHX_ "Can't access() script\n");
3852 /* If we can swap euid and uid, then we can determine access rights
3853 * with a simple stat of the file, and then compare device and
3854 * inode to make sure we did stat() on the same file we opened.
3855 * Then we just have to make sure he or she can execute it.
3858 * As the script is opened by perl, not suidperl, we do not need to
3859 * care much about access rights.
3861 * The 'script changed' check is needed, or we can get lied to
3862 * about $0 with e.g.
3863 * suidperl /dev/fd/4//bin/x 4<setuidscript
3864 * Without HAS_SETREUID, is it safe to stat() as root?
3866 * Are there any operating systems that pass /dev/fd/xxx for setuid
3867 * scripts, as suggested/described in perlsec(1)? Surely they do not
3868 * pass the script name as we do, so the "script changed" test would
3869 * fail for them... but we never get here with
3870 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3872 * This is one place where we must "lie" about return status: not
3873 * say if the stat() failed. We are doing this as root, and could
3874 * be tricked into reporting existence or not of files that the
3875 * "plain" user cannot even see.
3879 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3880 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3881 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3882 Perl_croak(aTHX_ "Setuid script changed\n");
3886 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3887 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3890 * We used to do this check as the "plain" user (after swapping
3891 * UIDs). But the check for nosuid and noexec filesystem is needed,
3892 * and should be done even without HAS_SETREUID. (Maybe those
3893 * operating systems do not have such mount options anyway...)
3894 * Seems safe enough to do as root.
3896 # if !defined(NO_NOSUID_CHECK)
3897 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3898 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3901 # endif /* IAMSUID */
3903 if (!S_ISREG(PL_statbuf.st_mode)) {
3904 Perl_croak(aTHX_ "Setuid script not plain file\n");
3906 if (PL_statbuf.st_mode & S_IWOTH)
3907 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3908 PL_doswitches = FALSE; /* -s is insecure in suid */
3909 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3910 CopLINE_inc(PL_curcop);
3911 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3912 Perl_croak(aTHX_ "No #! line");
3913 linestr = SvPV_nolen_const(linestr_sv);
3914 /* required even on Sys V */
3915 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3916 Perl_croak(aTHX_ "No #! line");
3920 /* Sanity check on line length */
3921 s_end = s + strlen(s);
3922 if (s_end == s || (s_end - s) > 4000)
3923 Perl_croak(aTHX_ "Very long #! line");
3924 /* Allow more than a single space after #! */
3925 while (isSPACE(*s)) s++;
3926 /* Sanity check on buffer end */
3927 while ((*s) && !isSPACE(*s)) s++;
3928 for (s2 = s; (s2 > linestr &&
3929 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3930 || s2[-1] == '-')); s2--) ;
3931 /* Sanity check on buffer start */
3932 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3933 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3934 Perl_croak(aTHX_ "Not a perl script");
3935 while (*s == ' ' || *s == '\t') s++;
3937 * #! arg must be what we saw above. They can invoke it by
3938 * mentioning suidperl explicitly, but they may not add any strange
3939 * arguments beyond what #! says if they do invoke suidperl that way.
3942 * The way validarg was set up, we rely on the kernel to start
3943 * scripts with argv[1] set to contain all #! line switches (the
3947 * Check that we got all the arguments listed in the #! line (not
3948 * just that there are no extraneous arguments). Might not matter
3949 * much, as switches from #! line seem to be acted upon (also), and
3950 * so may be checked and trapped in perl. But, security checks must
3951 * be done in suidperl and not deferred to perl. Note that suidperl
3952 * does not get around to parsing (and checking) the switches on
3953 * the #! line (but execs perl sooner).
3954 * Allow (require) a trailing newline (which may be of two
3955 * characters on some architectures?) (but no other trailing
3958 len = strlen(validarg);
3959 if (strEQ(validarg," PHOOEY ") ||
3960 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3961 !((s_end - s) == len+1
3962 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3963 Perl_croak(aTHX_ "Args must match #! line");
3967 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3968 PL_euid == PL_statbuf.st_uid)
3970 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3971 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3972 # endif /* IAMSUID */
3975 PL_euid) { /* oops, we're not the setuid root perl */
3977 * When root runs a setuid script, we do not go through the same
3978 * steps of execing sperl and then perl with fd scripts, but
3979 * simply set up UIDs within the same perl invocation; so do
3980 * not have the same checks (on options, whatever) that we have
3981 * for plain users. No problem really: would have to be a script
3982 * that does not actually work for plain users; and if root is
3983 * foolish and can be persuaded to run such an unsafe script, he
3984 * might run also non-setuid ones, and deserves what he gets.
3986 * Or, we might drop the PL_euid check above (and rely just on
3987 * fdscript to avoid loops), and do the execs
3993 * Pass fd script to suidperl.
3994 * Exec suidperl, substituting fd script for scriptname.
3995 * Pass script name as "subdir" of fd, which perl will grok;
3996 * in fact will use that to distinguish this from "normal"
3997 * usage, see comments above.
3999 PerlIO_rewind(rsfp);
4000 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4001 /* PSz 27 Feb 04 Sanity checks on scriptname */
4002 if ((!scriptname) || (!*scriptname) ) {
4003 Perl_croak(aTHX_ "No setuid script name\n");
4005 if (*scriptname == '-') {
4006 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4007 /* Or we might confuse it with an option when replacing
4008 * name in argument list, below (though we do pointer, not
4009 * string, comparisons).
4012 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4013 if (!PL_origargv[which]) {
4014 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4016 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4017 PerlIO_fileno(rsfp), PL_origargv[which]));
4018 # if defined(HAS_FCNTL) && defined(F_SETFD)
4019 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4022 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4023 (int)PERL_REVISION, (int)PERL_VERSION,
4024 (int)PERL_SUBVERSION), PL_origargv);
4026 # endif /* IAMSUID */
4027 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4030 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4032 * This seems back to front: we try HAS_SETEGID first; if not available
4033 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4034 * in the sense that we only want to set EGID; but are there any machines
4035 * with either of the latter, but not the former? Same with UID, later.
4038 (void)setegid(PL_statbuf.st_gid);
4040 # ifdef HAS_SETREGID
4041 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4043 # ifdef HAS_SETRESGID
4044 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4046 PerlProc_setgid(PL_statbuf.st_gid);
4050 if (PerlProc_getegid() != PL_statbuf.st_gid)
4051 Perl_croak(aTHX_ "Can't do setegid!\n");
4053 if (PL_statbuf.st_mode & S_ISUID) {
4054 if (PL_statbuf.st_uid != PL_euid)
4056 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4058 # ifdef HAS_SETREUID
4059 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4061 # ifdef HAS_SETRESUID
4062 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4064 PerlProc_setuid(PL_statbuf.st_uid);
4068 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4069 Perl_croak(aTHX_ "Can't do seteuid!\n");
4071 else if (PL_uid) { /* oops, mustn't run as root */
4073 (void)seteuid((Uid_t)PL_uid);
4075 # ifdef HAS_SETREUID
4076 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4078 # ifdef HAS_SETRESUID
4079 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4081 PerlProc_setuid((Uid_t)PL_uid);
4085 if (PerlProc_geteuid() != PL_uid)
4086 Perl_croak(aTHX_ "Can't do seteuid!\n");
4089 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4090 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4093 else if (fdscript < 0 || !suidscript)
4094 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4095 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4097 /* PSz 16 Sep 03 Keep neat error message */
4098 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4101 /* We absolutely must clear out any saved ids here, so we */
4102 /* exec the real perl, substituting fd script for scriptname. */
4103 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4105 * It might be thought that using setresgid and/or setresuid (changed to
4106 * set the saved IDs) above might obviate the need to exec, and we could
4107 * go on to "do the perl thing".
4109 * Is there such a thing as "saved GID", and is that set for setuid (but
4110 * not setgid) execution like suidperl? Without exec, it would not be
4111 * cleared for setuid (but not setgid) scripts (or might need a dummy
4114 * We need suidperl to do the exact same argument checking that perl
4115 * does. Thus it cannot be very small; while it could be significantly
4116 * smaller, it is safer (simpler?) to make it essentially the same
4117 * binary as perl (but they are not identical). - Maybe could defer that
4118 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4119 * but prefer to do thorough checks in suidperl itself. Such deferral
4120 * would make suidperl security rely on perl, a design no-no.
4122 * Setuid things should be short and simple, thus easy to understand and
4123 * verify. They should do their "own thing", without influence by
4124 * attackers. It may help if their internal execution flow is fixed,
4125 * regardless of platform: it may be best to exec anyway.
4127 * Suidperl should at least be conceptually simple: a wrapper only,
4128 * never to do any real perl. Maybe we should put
4130 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4132 * into the perly bits.
4134 PerlIO_rewind(rsfp);
4135 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4137 * Keep original arguments: suidperl already has fd script.
4139 # if defined(HAS_FCNTL) && defined(F_SETFD)
4140 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4143 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4144 (int)PERL_REVISION, (int)PERL_VERSION,
4145 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4147 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4148 # endif /* IAMSUID */
4153 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4154 /* Don't even need this function. */
4157 S_validate_suid(pTHX_ PerlIO *rsfp)
4159 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4160 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4161 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4162 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4164 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4167 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4168 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4169 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4170 /* not set-id, must be wrapped */
4173 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4177 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4181 register const char *s2;
4182 #ifdef MACOS_TRADITIONAL
4186 /* skip forward in input to the real script? */
4188 #ifdef MACOS_TRADITIONAL
4189 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4191 while (PL_doextract || gMacPerl_AlwaysExtract) {
4192 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4193 if (!gMacPerl_AlwaysExtract)
4194 Perl_croak(aTHX_ "No Perl script found in input\n");
4196 if (PL_doextract) /* require explicit override ? */
4197 if (!OverrideExtract(PL_origfilename))
4198 Perl_croak(aTHX_ "User aborted script\n");
4200 PL_doextract = FALSE;
4202 /* Pater peccavi, file does not have #! */
4203 PerlIO_rewind(rsfp);
4208 while (PL_doextract) {
4209 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4210 Perl_croak(aTHX_ "No Perl script found in input\n");
4213 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4214 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4215 PL_doextract = FALSE;
4216 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4218 while (*s == ' ' || *s == '\t') s++;
4220 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4221 || s2[-1] == '_') s2--;
4222 if (strnEQ(s2-4,"perl",4))
4223 while ((s = moreswitches(s)))
4226 #ifdef MACOS_TRADITIONAL
4227 /* We are always searching for the #!perl line in MacPerl,
4228 * so if we find it, still keep the line count correct
4229 * by counting lines we already skipped over
4231 for (; maclines > 0 ; maclines--)
4232 PerlIO_ungetc(rsfp, '\n');
4236 /* gMacPerl_AlwaysExtract is false in MPW tool */
4237 } else if (gMacPerl_AlwaysExtract) {
4249 PL_uid = PerlProc_getuid();
4250 PL_euid = PerlProc_geteuid();
4251 PL_gid = PerlProc_getgid();
4252 PL_egid = PerlProc_getegid();
4254 PL_uid |= PL_gid << 16;
4255 PL_euid |= PL_egid << 16;
4257 /* Should not happen: */
4258 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4259 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4262 * Should go by suidscript, not uid!=euid: why disallow
4263 * system("ls") in scripts run from setuid things?
4264 * Or, is this run before we check arguments and set suidscript?
4265 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4266 * (We never have suidscript, can we be sure to have fdscript?)
4267 * Or must then go by UID checks? See comments in forbid_setid also.
4271 /* This is used very early in the lifetime of the program,
4272 * before even the options are parsed, so PL_tainting has
4273 * not been initialized properly. */
4275 Perl_doing_taint(int argc, char *argv[], char *envp[])
4277 #ifndef PERL_IMPLICIT_SYS
4278 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4279 * before we have an interpreter-- and the whole point of this
4280 * function is to be called at such an early stage. If you are on
4281 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4282 * "tainted because running with altered effective ids', you'll
4283 * have to add your own checks somewhere in here. The two most
4284 * known samples of 'implicitness' are Win32 and NetWare, neither
4285 * of which has much of concept of 'uids'. */
4286 int uid = PerlProc_getuid();
4287 int euid = PerlProc_geteuid();
4288 int gid = PerlProc_getgid();
4289 int egid = PerlProc_getegid();
4296 if (uid && (euid != uid || egid != gid))
4298 #endif /* !PERL_IMPLICIT_SYS */
4299 /* This is a really primitive check; environment gets ignored only
4300 * if -T are the first chars together; otherwise one gets
4301 * "Too late" message. */
4302 if ( argc > 1 && argv[1][0] == '-'
4303 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4308 /* Passing the flag as a single char rather than a string is a slight space
4309 optimisation. The only message that isn't /^-.$/ is
4310 "program input from stdin", which is substituted in place of '\0', which
4311 could never be a command line flag. */
4313 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4316 char string[3] = "-x";
4317 const char *message = "program input from stdin";
4324 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4325 if (PL_euid != PL_uid)
4326 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4327 if (PL_egid != PL_gid)
4328 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4329 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4331 * Checks for UID/GID above "wrong": why disallow
4332 * perl -e 'print "Hello\n"'
4333 * from within setuid things?? Simply drop them: replaced by
4334 * fdscript/suidscript and #ifdef IAMSUID checks below.
4336 * This may be too late for command-line switches. Will catch those on
4337 * the #! line, after finding the script name and setting up
4338 * fdscript/suidscript. Note that suidperl does not get around to
4339 * parsing (and checking) the switches on the #! line, but checks that
4340 * the two sets are identical.
4342 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4343 * instead, or would that be "too late"? (We never have suidscript, can
4344 * we be sure to have fdscript?)
4346 * Catch things with suidscript (in descendant of suidperl), even with
4347 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4348 * below; but I am paranoid.
4350 * Also see comments about root running a setuid script, elsewhere.
4353 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4355 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4356 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4357 #endif /* IAMSUID */
4361 Perl_init_debugger(pTHX)
4364 HV * const ostash = PL_curstash;
4366 PL_curstash = PL_debstash;
4367 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4369 AvREAL_off(PL_dbargs);
4370 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4371 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4372 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4373 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4374 sv_setiv(PL_DBsingle, 0);
4375 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4376 sv_setiv(PL_DBtrace, 0);
4377 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4378 sv_setiv(PL_DBsignal, 0);
4379 PL_curstash = ostash;
4382 #ifndef STRESS_REALLOC
4383 #define REASONABLE(size) (size)
4385 #define REASONABLE(size) (1) /* unreasonable */
4389 Perl_init_stacks(pTHX)
4392 /* start with 128-item stack and 8K cxstack */
4393 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4394 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4395 PL_curstackinfo->si_type = PERLSI_MAIN;
4396 PL_curstack = PL_curstackinfo->si_stack;
4397 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4399 PL_stack_base = AvARRAY(PL_curstack);
4400 PL_stack_sp = PL_stack_base;
4401 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4403 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4406 PL_tmps_max = REASONABLE(128);
4408 Newx(PL_markstack,REASONABLE(32),I32);
4409 PL_markstack_ptr = PL_markstack;
4410 PL_markstack_max = PL_markstack + REASONABLE(32);
4414 Newx(PL_scopestack,REASONABLE(32),I32);
4415 PL_scopestack_ix = 0;
4416 PL_scopestack_max = REASONABLE(32);
4418 Newx(PL_savestack,REASONABLE(128),ANY);
4419 PL_savestack_ix = 0;
4420 PL_savestack_max = REASONABLE(128);
4429 while (PL_curstackinfo->si_next)
4430 PL_curstackinfo = PL_curstackinfo->si_next;
4431 while (PL_curstackinfo) {
4432 PERL_SI *p = PL_curstackinfo->si_prev;
4433 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4434 Safefree(PL_curstackinfo->si_cxstack);
4435 Safefree(PL_curstackinfo);
4436 PL_curstackinfo = p;
4438 Safefree(PL_tmps_stack);
4439 Safefree(PL_markstack);
4440 Safefree(PL_scopestack);
4441 Safefree(PL_savestack);
4446 S_init_predump_symbols(pTHX)
4452 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4453 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4454 GvMULTI_on(PL_stdingv);
4455 io = GvIOp(PL_stdingv);
4456 IoTYPE(io) = IoTYPE_RDONLY;
4457 IoIFP(io) = PerlIO_stdin();
4458 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4460 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4462 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4465 IoTYPE(io) = IoTYPE_WRONLY;
4466 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4468 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4470 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4472 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4473 GvMULTI_on(PL_stderrgv);
4474 io = GvIOp(PL_stderrgv);
4475 IoTYPE(io) = IoTYPE_WRONLY;
4476 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4477 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4479 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4481 PL_statname = newSV(0); /* last filename we did stat on */
4483 Safefree(PL_osname);
4484 PL_osname = savepv(OSNAME);
4488 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4491 argc--,argv++; /* skip name of script */
4492 if (PL_doswitches) {
4493 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4497 if (argv[0][1] == '-' && !argv[0][2]) {
4501 if ((s = strchr(argv[0], '='))) {
4502 const char *const start_name = argv[0] + 1;
4503 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4504 TRUE, SVt_PV)), s + 1);
4507 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4510 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4511 GvMULTI_on(PL_argvgv);
4512 (void)gv_AVadd(PL_argvgv);
4513 av_clear(GvAVn(PL_argvgv));
4514 for (; argc > 0; argc--,argv++) {
4515 SV * const sv = newSVpv(argv[0],0);
4516 av_push(GvAVn(PL_argvgv),sv);
4517 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4518 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4521 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4522 (void)sv_utf8_decode(sv);
4528 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4533 PL_toptarget = newSV_type(SVt_PVFM);
4534 sv_setpvn(PL_toptarget, "", 0);
4535 PL_bodytarget = newSV_type(SVt_PVFM);
4536 sv_setpvn(PL_bodytarget, "", 0);
4537 PL_formtarget = PL_bodytarget;
4541 init_argv_symbols(argc,argv);
4543 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4544 #ifdef MACOS_TRADITIONAL
4545 /* $0 is not majick on a Mac */
4546 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4548 sv_setpv(GvSV(tmpgv),PL_origfilename);
4549 magicname("0", "0", 1);
4552 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4554 bool env_is_not_environ;
4555 GvMULTI_on(PL_envgv);
4556 hv = GvHVn(PL_envgv);
4557 hv_magic(hv, NULL, PERL_MAGIC_env);
4559 #ifdef USE_ENVIRON_ARRAY
4560 /* Note that if the supplied env parameter is actually a copy
4561 of the global environ then it may now point to free'd memory
4562 if the environment has been modified since. To avoid this
4563 problem we treat env==NULL as meaning 'use the default'
4567 env_is_not_environ = env != environ;
4568 if (env_is_not_environ
4569 # ifdef USE_ITHREADS
4570 && PL_curinterp == aTHX
4579 for (; *env; env++) {
4580 if (!(s = strchr(*env,'=')) || s == *env)
4582 #if defined(MSDOS) && !defined(DJGPP)
4587 sv = newSVpv(s+1, 0);
4588 (void)hv_store(hv, *env, s - *env, sv, 0);
4589 if (env_is_not_environ)
4593 #endif /* USE_ENVIRON_ARRAY */
4594 #endif /* !PERL_MICRO */
4597 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4598 SvREADONLY_off(GvSV(tmpgv));
4599 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4600 SvREADONLY_on(GvSV(tmpgv));
4602 #ifdef THREADS_HAVE_PIDS
4603 PL_ppid = (IV)getppid();
4606 /* touch @F array to prevent spurious warnings 20020415 MJD */
4608 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4613 S_init_perllib(pTHX)
4619 s = PerlEnv_getenv("PERL5LIB");
4621 * It isn't possible to delete an environment variable with
4622 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4623 * case we treat PERL5LIB as undefined if it has a zero-length value.
4625 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4626 if (s && *s != '\0')
4630 incpush(s, TRUE, TRUE, TRUE, FALSE);
4632 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4634 /* Treat PERL5?LIB as a possible search list logical name -- the
4635 * "natural" VMS idiom for a Unix path string. We allow each
4636 * element to be a set of |-separated directories for compatibility.
4640 if (my_trnlnm("PERL5LIB",buf,0))
4641 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4643 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4647 /* Use the ~-expanded versions of APPLLIB (undocumented),
4648 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4651 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4655 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4657 #ifdef MACOS_TRADITIONAL
4660 SV * privdir = newSV(0);
4661 char * macperl = PerlEnv_getenv("MACPERL");
4666 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4667 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4668 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4669 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4670 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4671 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4673 SvREFCNT_dec(privdir);
4676 incpush(":", FALSE, FALSE, TRUE, FALSE);
4679 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4682 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4684 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4688 /* sitearch is always relative to sitelib on Windows for
4689 * DLL-based path intuition to work correctly */
4690 # if !defined(WIN32)
4691 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4697 /* this picks up sitearch as well */
4698 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4700 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4704 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4705 /* Search for version-specific dirs below here */
4706 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4709 #ifdef PERL_VENDORARCH_EXP
4710 /* vendorarch is always relative to vendorlib on Windows for
4711 * DLL-based path intuition to work correctly */
4712 # if !defined(WIN32)
4713 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4717 #ifdef PERL_VENDORLIB_EXP
4719 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4721 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4725 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4726 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4729 #ifdef PERL_OTHERLIBDIRS
4730 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4734 incpush(".", FALSE, FALSE, TRUE, FALSE);
4735 #endif /* MACOS_TRADITIONAL */
4738 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4739 # define PERLLIB_SEP ';'
4742 # define PERLLIB_SEP '|'
4744 # if defined(MACOS_TRADITIONAL)
4745 # define PERLLIB_SEP ','
4747 # define PERLLIB_SEP ':'
4751 #ifndef PERLLIB_MANGLE
4752 # define PERLLIB_MANGLE(s,n) (s)
4755 /* Push a directory onto @INC if it exists.
4756 Generate a new SV if we do this, to save needing to copy the SV we push
4759 S_incpush_if_exists(pTHX_ SV *dir)
4763 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4764 S_ISDIR(tmpstatbuf.st_mode)) {
4765 av_push(GvAVn(PL_incgv), dir);
4772 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4777 const char *p = dir;
4782 if (addsubdirs || addoldvers) {
4786 /* Break at all separators */
4788 SV *libdir = newSV(0);
4791 /* skip any consecutive separators */
4793 while ( *p == PERLLIB_SEP ) {
4794 /* Uncomment the next line for PATH semantics */
4795 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4800 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4801 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4806 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4807 p = NULL; /* break out */
4809 #ifdef MACOS_TRADITIONAL
4810 if (!strchr(SvPVX(libdir), ':')) {
4813 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4815 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4816 sv_catpvs(libdir, ":");
4819 /* Do the if() outside the #ifdef to avoid warnings about an unused
4822 #ifdef PERL_RELOCATABLE_INC
4824 * Relocatable include entries are marked with a leading .../
4827 * 0: Remove that leading ".../"
4828 * 1: Remove trailing executable name (anything after the last '/')
4829 * from the perl path to give a perl prefix
4831 * While the @INC element starts "../" and the prefix ends with a real
4832 * directory (ie not . or ..) chop that real directory off the prefix
4833 * and the leading "../" from the @INC element. ie a logical "../"
4835 * Finally concatenate the prefix and the remainder of the @INC element
4836 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4837 * generates /usr/local/lib/perl5
4839 const char *libpath = SvPVX(libdir);
4840 STRLEN libpath_len = SvCUR(libdir);
4841 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4843 SV * const caret_X = get_sv("\030", 0);
4844 /* Going to use the SV just as a scratch buffer holding a C
4850 /* $^X is *the* source of taint if tainting is on, hence
4851 SvPOK() won't be true. */
4853 assert(SvPOKp(caret_X));
4854 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4856 /* Firstly take off the leading .../
4857 If all else fail we'll do the paths relative to the current
4859 sv_chop(libdir, libpath + 4);
4860 /* Don't use SvPV as we're intentionally bypassing taining,
4861 mortal copies that the mg_get of tainting creates, and
4862 corruption that seems to come via the save stack.
4863 I guess that the save stack isn't correctly set up yet. */
4864 libpath = SvPVX(libdir);
4865 libpath_len = SvCUR(libdir);
4867 /* This would work more efficiently with memrchr, but as it's
4868 only a GNU extension we'd need to probe for it and
4869 implement our own. Not hard, but maybe not worth it? */
4871 prefix = SvPVX(prefix_sv);
4872 lastslash = strrchr(prefix, '/');
4874 /* First time in with the *lastslash = '\0' we just wipe off
4875 the trailing /perl from (say) /usr/foo/bin/perl
4879 while ((*lastslash = '\0'), /* Do that, come what may. */
4880 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4881 && (lastslash = strrchr(prefix, '/')))) {
4882 if (lastslash[1] == '\0'
4883 || (lastslash[1] == '.'
4884 && (lastslash[2] == '/' /* ends "/." */
4885 || (lastslash[2] == '/'
4886 && lastslash[3] == '/' /* or "/.." */
4888 /* Prefix ends "/" or "/." or "/..", any of which
4889 are fishy, so don't do any more logical cleanup.
4893 /* Remove leading "../" from path */
4896 /* Next iteration round the loop removes the last
4897 directory name from prefix by writing a '\0' in
4898 the while clause. */
4900 /* prefix has been terminated with a '\0' to the correct
4901 length. libpath points somewhere into the libdir SV.
4902 We need to join the 2 with '/' and drop the result into
4904 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4905 SvREFCNT_dec(libdir);
4906 /* And this is the new libdir. */
4909 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4910 /* Need to taint reloccated paths if running set ID */
4911 SvTAINTED_on(libdir);
4914 SvREFCNT_dec(prefix_sv);
4919 * BEFORE pushing libdir onto @INC we may first push version- and
4920 * archname-specific sub-directories.
4922 if (addsubdirs || addoldvers) {
4923 #ifdef PERL_INC_VERSION_LIST
4924 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4925 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4926 const char * const *incver;
4932 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4934 while (unix[len-1] == '/') len--; /* Cosmetic */
4935 sv_usepvn(libdir,unix,len);
4938 PerlIO_printf(Perl_error_log,
4939 "Failed to unixify @INC element \"%s\"\n",
4943 #ifdef MACOS_TRADITIONAL
4944 #define PERL_AV_SUFFIX_FMT ""
4945 #define PERL_ARCH_FMT "%s:"
4946 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4948 #define PERL_AV_SUFFIX_FMT "/"
4949 #define PERL_ARCH_FMT "/%s"
4950 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4952 /* .../version/archname if -d .../version/archname */
4953 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4955 (int)PERL_REVISION, (int)PERL_VERSION,
4956 (int)PERL_SUBVERSION, ARCHNAME);
4957 subdir = S_incpush_if_exists(aTHX_ subdir);
4959 /* .../version if -d .../version */
4960 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
4962 (int)PERL_REVISION, (int)PERL_VERSION,
4963 (int)PERL_SUBVERSION);
4964 subdir = S_incpush_if_exists(aTHX_ subdir);
4966 /* .../archname if -d .../archname */
4967 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4968 SVfARG(libdir), ARCHNAME);
4969 subdir = S_incpush_if_exists(aTHX_ subdir);
4973 #ifdef PERL_INC_VERSION_LIST
4975 for (incver = incverlist; *incver; incver++) {
4976 /* .../xxx if -d .../xxx */
4977 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4978 SVfARG(libdir), *incver);
4979 subdir = S_incpush_if_exists(aTHX_ subdir);
4985 /* finally push this lib directory on the end of @INC */
4986 av_push(GvAVn(PL_incgv), libdir);
4989 assert (SvREFCNT(subdir) == 1);
4990 SvREFCNT_dec(subdir);
4996 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5000 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5006 while (av_len(paramList) >= 0) {
5007 cv = (CV*)av_shift(paramList);
5009 if (paramList == PL_beginav) {
5010 /* save PL_beginav for compiler */
5011 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5013 else if (paramList == PL_checkav) {
5014 /* save PL_checkav for compiler */
5015 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5017 else if (paramList == PL_unitcheckav) {
5018 /* save PL_unitcheckav for compiler */
5019 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5030 PL_madskills |= 16384;
5035 PL_madskills &= ~16384;
5038 (void)SvPV_const(atsv, len);
5040 PL_curcop = &PL_compiling;
5041 CopLINE_set(PL_curcop, oldline);
5042 if (paramList == PL_beginav)
5043 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5045 Perl_sv_catpvf(aTHX_ atsv,
5046 "%s failed--call queue aborted",
5047 paramList == PL_checkav ? "CHECK"
5048 : paramList == PL_initav ? "INIT"
5049 : paramList == PL_unitcheckav ? "UNITCHECK"
5051 while (PL_scopestack_ix > oldscope)
5054 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5061 /* my_exit() was called */
5062 while (PL_scopestack_ix > oldscope)
5065 PL_curstash = PL_defstash;
5066 PL_curcop = &PL_compiling;
5067 CopLINE_set(PL_curcop, oldline);
5069 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5070 if (paramList == PL_beginav)
5071 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5073 Perl_croak(aTHX_ "%s failed--call queue aborted",
5074 paramList == PL_checkav ? "CHECK"
5075 : paramList == PL_initav ? "INIT"
5076 : paramList == PL_unitcheckav ? "UNITCHECK"
5083 PL_curcop = &PL_compiling;
5084 CopLINE_set(PL_curcop, oldline);
5087 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5096 Perl_my_exit(pTHX_ U32 status)
5099 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5100 (void*)thr, (unsigned long) status));
5109 STATUS_EXIT_SET(status);
5116 Perl_my_failure_exit(pTHX)
5120 /* We have been called to fall on our sword. The desired exit code
5121 * should be already set in STATUS_UNIX, but could be shifted over
5122 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5125 * If an error code has not been set, then force the issue.
5127 if (MY_POSIX_EXIT) {
5129 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5130 * the exit code when there isn't an error.
5133 if (STATUS_UNIX == 0)
5134 STATUS_UNIX_EXIT_SET(255);
5136 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5138 /* The exit code could have been set by $? or vmsish which
5139 * means that it may not be fatal. So convert
5140 * success/warning codes to fatal.
5142 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5143 STATUS_UNIX_EXIT_SET(255);
5147 /* Traditionally Perl on VMS always expects a Fatal Error. */
5148 if (vaxc$errno & 1) {
5150 /* So force success status to failure */
5151 if (STATUS_NATIVE & 1)
5156 STATUS_UNIX = EINTR; /* In case something cares */
5161 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5163 /* Encode the severity code */
5164 severity = STATUS_NATIVE & STS$M_SEVERITY;
5165 STATUS_UNIX = (severity ? severity : 1) << 8;
5167 /* Perl expects this to be a fatal error */
5168 if (severity != STS$K_SEVERE)
5177 STATUS_UNIX_SET(errno);
5179 exitstatus = STATUS_UNIX >> 8;
5180 if (exitstatus & 255)
5181 STATUS_UNIX_SET(exitstatus);
5183 STATUS_UNIX_SET(255);
5190 S_my_exit_jump(pTHX)
5195 SvREFCNT_dec(PL_e_script);
5199 POPSTACK_TO(PL_mainstack);
5207 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5210 const char * const p = SvPVX_const(PL_e_script);
5211 const char *nl = strchr(p, '\n');
5213 PERL_UNUSED_ARG(idx);
5214 PERL_UNUSED_ARG(maxlen);
5216 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5218 filter_del(read_e_script);
5221 sv_catpvn(buf_sv, p, nl-p);
5222 sv_chop(PL_e_script, nl);
5228 * c-indentation-style: bsd
5230 * indent-tabs-mode: t
5233 * ex: set ts=8 sts=4 sw=4 noet: