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;
1681 const char *validarg = "";
1685 const char *cddir = NULL;
1686 #ifdef USE_SITECUSTOMIZE
1687 bool minus_f = FALSE;
1689 SV *linestr_sv = newSV_type(SVt_PVIV);
1690 bool add_read_e_script = FALSE;
1692 SvGROW(linestr_sv, 80);
1693 sv_setpvn(linestr_sv,"",0);
1695 sv = newSVpvs(""); /* first used for -I flags */
1701 for (argc--,argv++; argc > 0; argc--,argv++) {
1702 if (argv[0][0] != '-' || !argv[0][1])
1706 validarg = " PHOOEY ";
1710 * Can we rely on the kernel to start scripts with argv[1] set to
1711 * contain all #! line switches (the whole line)? (argv[0] is set to
1712 * the interpreter name, argv[2] to the script name; argv[3] and
1713 * above may contain other arguments.)
1720 #ifndef PERL_STRICT_CR
1744 if ((s = moreswitches(s)))
1749 CHECK_MALLOC_TOO_LATE_FOR('t');
1750 if( !PL_tainting ) {
1751 PL_taint_warn = TRUE;
1757 CHECK_MALLOC_TOO_LATE_FOR('T');
1759 PL_taint_warn = FALSE;
1767 #ifdef MACOS_TRADITIONAL
1768 /* ignore -e for Dev:Pseudo argument */
1769 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1772 forbid_setid('e', FALSE);
1774 PL_e_script = newSVpvs("");
1775 add_read_e_script = TRUE;
1778 sv_catpv(PL_e_script, s);
1780 sv_catpv(PL_e_script, argv[1]);
1784 Perl_croak(aTHX_ "No code specified for -%c", c);
1785 sv_catpvs(PL_e_script, "\n");
1789 #ifdef USE_SITECUSTOMIZE
1795 case 'I': /* -I handled both here and in moreswitches() */
1796 forbid_setid('I', FALSE);
1797 if (!*++s && (s=argv[1]) != NULL) {
1801 STRLEN len = strlen(s);
1802 const char * const p = savepvn(s, len);
1803 incpush(p, TRUE, TRUE, FALSE, FALSE);
1804 sv_catpvs(sv, "-I");
1805 sv_catpvn(sv, p, len);
1810 Perl_croak(aTHX_ "No directory specified for -I");
1813 forbid_setid('S', FALSE);
1821 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1823 /* Can't do newSVpvs() as that would involve pre-processor
1824 condititionals inside a macro expansion. */
1825 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1832 # ifdef PERL_DONT_CREATE_GVSV
1833 " PERL_DONT_CREATE_GVSV"
1835 # ifdef PERL_MALLOC_WRAP
1838 # ifdef PERL_MEM_LOG
1841 # ifdef PERL_MEM_LOG_ENV
1844 # ifdef PERL_MEM_LOG_ENV_FD
1845 " PERL_MEM_LOG_ENV_FD"
1847 # ifdef PERL_MEM_LOG_STDERR
1848 " PERL_MEM_LOG_STDERR"
1850 # ifdef PERL_MEM_LOG_TIMESTAMP
1851 " PERL_MEM_LOG_TIMESTAMP"
1853 # ifdef PERL_USE_SAFE_PUTENV
1854 " PERL_USE_SAFE_PUTENV"
1856 # ifdef USE_SITECUSTOMIZE
1857 " USE_SITECUSTOMIZE"
1861 sv_catpv(opts_prog, PL_bincompat_options);
1862 /* Terminate the qw(, and then wrap at 76 columns. */
1863 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1865 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1867 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1870 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1872 #if defined(LOCAL_PATCH_COUNT)
1873 if (LOCAL_PATCH_COUNT > 0) {
1875 sv_catpvs(opts_prog,
1876 "\" Locally applied patches:\\n\",");
1877 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1878 if (PL_localpatches[i])
1879 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1880 0, PL_localpatches[i], 0);
1884 Perl_sv_catpvf(aTHX_ opts_prog,
1885 "\" Built under %s\\n",OSNAME);
1888 sv_catpvs(opts_prog,
1889 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1891 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1894 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1895 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1896 "sort grep {/^PERL/} keys %ENV; ");
1898 sv_catpvs(opts_prog,
1899 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1901 sv_catpvs(opts_prog,
1902 "print \" \\%ENV:\\n @env\\n\" if @env;"
1903 "print \" \\@INC:\\n @INC\\n\";");
1907 opts_prog = Perl_newSVpvf(aTHX_
1908 "Config::config_vars(qw%c%s%c)",
1912 av_push(PL_preambleav, opts_prog);
1913 /* don't look for script or read stdin */
1914 scriptname = BIT_BUCKET;
1918 PL_doextract = TRUE;
1926 if (!*++s || isSPACE(*s)) {
1930 /* catch use of gnu style long options */
1931 if (strEQ(s, "version")) {
1935 if (strEQ(s, "help")) {
1942 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1953 #ifndef SECURE_INTERNAL_GETENV
1956 (s = PerlEnv_getenv("PERL5OPT")))
1958 const char *popt = s;
1961 if (*s == '-' && *(s+1) == 'T') {
1962 CHECK_MALLOC_TOO_LATE_FOR('T');
1964 PL_taint_warn = FALSE;
1967 char *popt_copy = NULL;
1980 if (!strchr("CDIMUdmtw", *s))
1981 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1985 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1986 s = popt_copy + (s - popt);
1987 d = popt_copy + (d - popt);
1994 if( !PL_tainting ) {
1995 PL_taint_warn = TRUE;
2006 #ifdef USE_SITECUSTOMIZE
2008 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2009 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2014 scriptname = argv[0];
2017 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2019 else if (scriptname == NULL) {
2021 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2027 /* Set $^X early so that it can be used for relocatable paths in @INC */
2028 assert (!PL_tainted);
2030 S_set_caret_X(aTHX);
2035 bool suidscript = FALSE;
2038 const int fdscript =
2040 open_script(scriptname, dosearch, &suidscript, &rsfp);
2042 validate_suid(validarg, scriptname, fdscript, suidscript,
2046 # if defined(SIGCHLD) || defined(SIGCLD)
2049 # define SIGCHLD SIGCLD
2051 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2052 if (sigstate == (Sighandler_t) SIG_IGN) {
2053 if (ckWARN(WARN_SIGNAL))
2054 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2055 "Can't ignore signal CHLD, forcing to default");
2056 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2063 #ifdef MACOS_TRADITIONAL
2064 || gMacPerl_AlwaysExtract
2068 /* This will croak if suidscript is true, as -x cannot be used with
2070 forbid_setid('x', suidscript);
2071 /* Hence you can't get here if suidscript is true */
2073 find_beginning(linestr_sv, rsfp);
2074 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2075 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2079 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2080 CvUNIQUE_on(PL_compcv);
2082 CvPADLIST(PL_compcv) = pad_new(0);
2084 PL_isarev = newHV();
2087 boot_core_UNIVERSAL();
2088 boot_core_xsutils();
2092 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2094 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2100 # ifdef HAS_SOCKS5_INIT
2101 socks5_init(argv[0]);
2107 init_predump_symbols();
2108 /* init_postdump_symbols not currently designed to be called */
2109 /* more than once (ENV isn't cleared first, for example) */
2110 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2112 init_postdump_symbols(argc,argv,env);
2114 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2115 * or explicitly in some platforms.
2116 * locale.c:Perl_init_i18nl10n() if the environment
2117 * look like the user wants to use UTF-8. */
2118 #if defined(__SYMBIAN32__)
2119 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2122 /* Requires init_predump_symbols(). */
2123 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2128 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2129 * and the default open disciplines. */
2130 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2131 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2133 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2134 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2135 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2137 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2138 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2139 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2141 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2142 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2143 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2145 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2146 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2149 sv_setpvn(sv, ":utf8\0:utf8", 11);
2151 sv_setpvn(sv, ":utf8\0", 6);
2154 sv_setpvn(sv, "\0:utf8", 6);
2162 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2163 if (strEQ(s, "unsafe"))
2164 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2165 else if (strEQ(s, "safe"))
2166 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2168 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2175 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2179 PL_xmlfp = PerlIO_stdout();
2181 PL_xmlfp = PerlIO_open(s, "w");
2183 Perl_croak(aTHX_ "Can't open %s", s);
2185 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2191 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2192 PL_madskills = atoi(s);
2193 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2198 lex_start(linestr_sv, rsfp, TRUE);
2199 PL_subname = newSVpvs("main");
2201 if (add_read_e_script)
2202 filter_add(read_e_script, NULL);
2204 /* now parse the script */
2206 SETERRNO(0,SS_NORMAL);
2207 #ifdef MACOS_TRADITIONAL
2208 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2210 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2212 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2213 MacPerl_MPWFileName(PL_origfilename));
2217 if (yyparse() || PL_parser->error_count) {
2219 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2221 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2226 CopLINE_set(PL_curcop, 0);
2227 PL_curstash = PL_defstash;
2229 SvREFCNT_dec(PL_e_script);
2237 SAVECOPFILE(PL_curcop);
2238 SAVECOPLINE(PL_curcop);
2239 gv_check(PL_defstash);
2248 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2249 dump_mstats("after compilation:");
2259 =for apidoc perl_run
2261 Tells a Perl interpreter to run. See L<perlembed>.
2274 PERL_UNUSED_ARG(my_perl);
2276 oldscope = PL_scopestack_ix;
2284 cxstack_ix = -1; /* start context stack again */
2286 case 0: /* normal completion */
2290 case 2: /* my_exit() */
2291 while (PL_scopestack_ix > oldscope)
2294 PL_curstash = PL_defstash;
2295 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2296 PL_endav && !PL_minus_c)
2297 call_list(oldscope, PL_endav);
2299 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2300 dump_mstats("after execution: ");
2306 POPSTACK_TO(PL_mainstack);
2309 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2320 S_run_body(pTHX_ I32 oldscope)
2323 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2324 PL_sawampersand ? "Enabling" : "Omitting"));
2326 if (!PL_restartop) {
2330 exit(0); /* less likely to core dump than my_exit(0) */
2333 DEBUG_x(dump_all());
2336 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2338 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2342 #ifdef MACOS_TRADITIONAL
2343 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2344 (gMacPerl_ErrorFormat ? "# " : ""),
2345 MacPerl_MPWFileName(PL_origfilename));
2347 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2351 if (PERLDB_SINGLE && PL_DBsingle)
2352 sv_setiv(PL_DBsingle, 1);
2354 call_list(oldscope, PL_initav);
2355 #ifdef PERL_DEBUG_READONLY_OPS
2356 Perl_pending_Slabs_to_ro(aTHX);
2363 PL_op = PL_restartop;
2367 else if (PL_main_start) {
2368 CvDEPTH(PL_main_cv) = 1;
2369 PL_op = PL_main_start;
2377 =head1 SV Manipulation Functions
2379 =for apidoc p||get_sv
2381 Returns the SV of the specified Perl scalar. If C<create> is set and the
2382 Perl variable does not exist then it will be created. If C<create> is not
2383 set and the variable does not exist then NULL is returned.
2389 Perl_get_sv(pTHX_ const char *name, I32 create)
2392 gv = gv_fetchpv(name, create, SVt_PV);
2399 =head1 Array Manipulation Functions
2401 =for apidoc p||get_av
2403 Returns the AV of the specified Perl array. If C<create> is set and the
2404 Perl variable does not exist then it will be created. If C<create> is not
2405 set and the variable does not exist then NULL is returned.
2411 Perl_get_av(pTHX_ const char *name, I32 create)
2413 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2422 =head1 Hash Manipulation Functions
2424 =for apidoc p||get_hv
2426 Returns the HV of the specified Perl hash. If C<create> is set and the
2427 Perl variable does not exist then it will be created. If C<create> is not
2428 set and the variable does not exist then NULL is returned.
2434 Perl_get_hv(pTHX_ const char *name, I32 create)
2436 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2445 =head1 CV Manipulation Functions
2447 =for apidoc p||get_cvn_flags
2449 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2450 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2451 exist then it will be declared (which has the same effect as saying
2452 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2453 then NULL is returned.
2455 =for apidoc p||get_cv
2457 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2463 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2465 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2466 /* XXX this is probably not what they think they're getting.
2467 * It has the same effect as "sub name;", i.e. just a forward
2469 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2470 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2471 return newSUB(start_subparse(FALSE, 0),
2472 newSVOP(OP_CONST, 0, sv),
2481 Perl_get_cv(pTHX_ const char *name, I32 flags)
2483 return get_cvn_flags(name, strlen(name), flags);
2486 /* Be sure to refetch the stack pointer after calling these routines. */
2490 =head1 Callback Functions
2492 =for apidoc p||call_argv
2494 Performs a callback to the specified Perl sub. See L<perlcall>.
2500 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2502 /* See G_* flags in cop.h */
2503 /* null terminated arg list */
2511 mXPUSHs(newSVpv(*argv,0));
2516 return call_pv(sub_name, flags);
2520 =for apidoc p||call_pv
2522 Performs a callback to the specified Perl sub. See L<perlcall>.
2528 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2529 /* name of the subroutine */
2530 /* See G_* flags in cop.h */
2532 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2536 =for apidoc p||call_method
2538 Performs a callback to the specified Perl method. The blessed object must
2539 be on the stack. See L<perlcall>.
2545 Perl_call_method(pTHX_ const char *methname, I32 flags)
2546 /* name of the subroutine */
2547 /* See G_* flags in cop.h */
2549 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2552 /* May be called with any of a CV, a GV, or an SV containing the name. */
2554 =for apidoc p||call_sv
2556 Performs a callback to the Perl sub whose name is in the SV. See
2563 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2564 /* See G_* flags in cop.h */
2567 LOGOP myop; /* fake syntax tree node */
2572 bool oldcatch = CATCH_GET;
2574 OP* const oldop = PL_op;
2577 if (flags & G_DISCARD) {
2582 Zero(&myop, 1, LOGOP);
2583 myop.op_next = NULL;
2584 if (!(flags & G_NOARGS))
2585 myop.op_flags |= OPf_STACKED;
2586 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2587 (flags & G_ARRAY) ? OPf_WANT_LIST :
2592 EXTEND(PL_stack_sp, 1);
2593 *++PL_stack_sp = sv;
2595 oldscope = PL_scopestack_ix;
2597 if (PERLDB_SUB && PL_curstash != PL_debstash
2598 /* Handle first BEGIN of -d. */
2599 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2600 /* Try harder, since this may have been a sighandler, thus
2601 * curstash may be meaningless. */
2602 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2603 && !(flags & G_NODEBUG))
2604 PL_op->op_private |= OPpENTERSUB_DB;
2606 if (flags & G_METHOD) {
2607 Zero(&method_op, 1, UNOP);
2608 method_op.op_next = PL_op;
2609 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2610 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2611 PL_op = (OP*)&method_op;
2614 if (!(flags & G_EVAL)) {
2616 CALL_BODY_SUB((OP*)&myop);
2617 retval = PL_stack_sp - (PL_stack_base + oldmark);
2618 CATCH_SET(oldcatch);
2621 myop.op_other = (OP*)&myop;
2623 create_eval_scope(flags|G_FAKINGEVAL);
2631 CALL_BODY_SUB((OP*)&myop);
2632 retval = PL_stack_sp - (PL_stack_base + oldmark);
2633 if (!(flags & G_KEEPERR))
2634 sv_setpvn(ERRSV,"",0);
2640 /* my_exit() was called */
2641 PL_curstash = PL_defstash;
2644 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2645 Perl_croak(aTHX_ "Callback called exit");
2650 PL_op = PL_restartop;
2654 PL_stack_sp = PL_stack_base + oldmark;
2655 if (flags & G_ARRAY)
2659 *++PL_stack_sp = &PL_sv_undef;
2664 if (PL_scopestack_ix > oldscope)
2665 delete_eval_scope();
2669 if (flags & G_DISCARD) {
2670 PL_stack_sp = PL_stack_base + oldmark;
2679 /* Eval a string. The G_EVAL flag is always assumed. */
2682 =for apidoc p||eval_sv
2684 Tells Perl to C<eval> the string in the SV.
2690 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2692 /* See G_* flags in cop.h */
2696 UNOP myop; /* fake syntax tree node */
2697 VOL I32 oldmark = SP - PL_stack_base;
2700 OP* const oldop = PL_op;
2703 if (flags & G_DISCARD) {
2710 Zero(PL_op, 1, UNOP);
2711 EXTEND(PL_stack_sp, 1);
2712 *++PL_stack_sp = sv;
2714 if (!(flags & G_NOARGS))
2715 myop.op_flags = OPf_STACKED;
2716 myop.op_next = NULL;
2717 myop.op_type = OP_ENTEREVAL;
2718 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2719 (flags & G_ARRAY) ? OPf_WANT_LIST :
2721 if (flags & G_KEEPERR)
2722 myop.op_flags |= OPf_SPECIAL;
2724 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2725 * before a PUSHEVAL, which corrupts the stack after a croak */
2726 TAINT_PROPER("eval_sv()");
2732 CALL_BODY_EVAL((OP*)&myop);
2733 retval = PL_stack_sp - (PL_stack_base + oldmark);
2734 if (!(flags & G_KEEPERR))
2735 sv_setpvn(ERRSV,"",0);
2741 /* my_exit() was called */
2742 PL_curstash = PL_defstash;
2745 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2746 Perl_croak(aTHX_ "Callback called exit");
2751 PL_op = PL_restartop;
2755 PL_stack_sp = PL_stack_base + oldmark;
2756 if (flags & G_ARRAY)
2760 *++PL_stack_sp = &PL_sv_undef;
2766 if (flags & G_DISCARD) {
2767 PL_stack_sp = PL_stack_base + oldmark;
2777 =for apidoc p||eval_pv
2779 Tells Perl to C<eval> the given string and return an SV* result.
2785 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2789 SV* sv = newSVpv(p, 0);
2791 eval_sv(sv, G_SCALAR);
2798 if (croak_on_error && SvTRUE(ERRSV)) {
2799 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2805 /* Require a module. */
2808 =head1 Embedding Functions
2810 =for apidoc p||require_pv
2812 Tells Perl to C<require> the file named by the string argument. It is
2813 analogous to the Perl code C<eval "require '$file'">. It's even
2814 implemented that way; consider using load_module instead.
2819 Perl_require_pv(pTHX_ const char *pv)
2824 PUSHSTACKi(PERLSI_REQUIRE);
2826 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2827 eval_sv(sv_2mortal(sv), G_DISCARD);
2833 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2835 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2838 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2842 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2844 /* This message really ought to be max 23 lines.
2845 * Removed -h because the user already knows that option. Others? */
2847 static const char * const usage_msg[] = {
2848 "-0[octal] specify record separator (\\0, if no argument)",
2849 "-a autosplit mode with -n or -p (splits $_ into @F)",
2850 "-C[number/list] enables the listed Unicode features",
2851 "-c check syntax only (runs BEGIN and CHECK blocks)",
2852 "-d[:debugger] run program under debugger",
2853 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2854 "-e program one line of program (several -e's allowed, omit programfile)",
2855 "-E program like -e, but enables all optional features",
2856 "-f don't do $sitelib/sitecustomize.pl at startup",
2857 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2858 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2859 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2860 "-l[octal] enable line ending processing, specifies line terminator",
2861 "-[mM][-]module execute \"use/no module...\" before executing program",
2862 "-n assume \"while (<>) { ... }\" loop around program",
2863 "-p assume loop like -n but print line also, like sed",
2864 "-s enable rudimentary parsing for switches after programfile",
2865 "-S look for programfile using PATH environment variable",
2866 "-t enable tainting warnings",
2867 "-T enable tainting checks",
2868 "-u dump core after parsing program",
2869 "-U allow unsafe operations",
2870 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2871 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2872 "-w enable many useful warnings (RECOMMENDED)",
2873 "-W enable all warnings",
2874 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2875 "-X disable all warnings",
2879 const char * const *p = usage_msg;
2881 PerlIO_printf(PerlIO_stdout(),
2882 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2885 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2888 /* convert a string of -D options (or digits) into an int.
2889 * sets *s to point to the char after the options */
2893 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2895 static const char * const usage_msgd[] = {
2896 " Debugging flag values: (see also -d)",
2897 " p Tokenizing and parsing (with v, displays parse stack)",
2898 " s Stack snapshots (with v, displays all stacks)",
2899 " l Context (loop) stack processing",
2900 " t Trace execution",
2901 " o Method and overloading resolution",
2902 " c String/numeric conversions",
2903 " P Print profiling info, source file input state",
2904 " m Memory allocation",
2905 " f Format processing",
2906 " r Regular expression parsing and execution",
2907 " x Syntax tree dump",
2908 " u Tainting checks",
2909 " H Hash dump -- usurps values()",
2910 " X Scratchpad allocation",
2912 " S Thread synchronization",
2914 " R Include reference counts of dumped variables (eg when using -Ds)",
2915 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2916 " v Verbose: use in conjunction with other flags",
2918 " A Consistency checks on internal structures",
2919 " q quiet - currently only suppresses the 'EXECUTING' message",
2924 /* if adding extra options, remember to update DEBUG_MASK */
2925 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2927 for (; isALNUM(**s); (*s)++) {
2928 const char * const d = strchr(debopts,**s);
2930 i |= 1 << (d - debopts);
2931 else if (ckWARN_d(WARN_DEBUGGING))
2932 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2933 "invalid option -D%c, use -D'' to see choices\n", **s);
2936 else if (isDIGIT(**s)) {
2938 for (; isALNUM(**s); (*s)++) ;
2940 else if (givehelp) {
2941 const char *const *p = usage_msgd;
2942 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2945 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2946 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2947 "-Dp not implemented on this platform\n");
2953 /* This routine handles any switches that can be given during run */
2956 Perl_moreswitches(pTHX_ const char *s)
2967 SvREFCNT_dec(PL_rs);
2968 if (s[1] == 'x' && s[2]) {
2969 const char *e = s+=2;
2975 flags = PERL_SCAN_SILENT_ILLDIGIT;
2976 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2977 if (s + numlen < e) {
2978 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2982 PL_rs = newSVpvs("");
2983 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2984 tmps = (U8*)SvPVX(PL_rs);
2985 uvchr_to_utf8(tmps, rschar);
2986 SvCUR_set(PL_rs, UNISKIP(rschar));
2991 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2992 if (rschar & ~((U8)~0))
2993 PL_rs = &PL_sv_undef;
2994 else if (!rschar && numlen >= 2)
2995 PL_rs = newSVpvs("");
2997 char ch = (char)rschar;
2998 PL_rs = newSVpvn(&ch, 1);
3001 sv_setsv(get_sv("/", TRUE), PL_rs);
3006 PL_unicode = parse_unicode_opts( (const char **)&s );
3007 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3013 while (*s && !isSPACE(*s)) ++s;
3014 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3025 forbid_setid('d', FALSE);
3028 /* -dt indicates to the debugger that threads will be used */
3029 if (*s == 't' && !isALNUM(s[1])) {
3031 my_setenv("PERL5DB_THREADED", "1");
3034 /* The following permits -d:Mod to accepts arguments following an =
3035 in the fashion that -MSome::Mod does. */
3036 if (*s == ':' || *s == '=') {
3037 const char *start = ++s;
3038 const char *const end = s + strlen(s);
3039 SV * const sv = newSVpvs("use Devel::");
3041 /* We now allow -d:Module=Foo,Bar */
3042 while(isALNUM(*s) || *s==':') ++s;
3044 sv_catpvn(sv, start, end - start);
3046 sv_catpvn(sv, start, s-start);
3047 /* Don't use NUL as q// delimiter here, this string goes in the
3049 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3052 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3056 PL_perldb = PERLDB_ALL;
3063 forbid_setid('D', FALSE);
3065 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3066 #else /* !DEBUGGING */
3067 if (ckWARN_d(WARN_DEBUGGING))
3068 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3069 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3070 for (s++; isALNUM(*s); s++) ;
3075 usage(PL_origargv[0]);
3078 Safefree(PL_inplace);
3079 #if defined(__CYGWIN__) /* do backup extension automagically */
3080 if (*(s+1) == '\0') {
3081 PL_inplace = savepvs(".bak");
3084 #endif /* __CYGWIN__ */
3086 const char * const start = ++s;
3087 while (*s && !isSPACE(*s))
3090 PL_inplace = savepvn(start, s - start);
3094 if (*s == '-') /* Additional switches on #! line. */
3098 case 'I': /* -I handled both here and in parse_body() */
3099 forbid_setid('I', FALSE);
3101 while (*s && isSPACE(*s))
3106 /* ignore trailing spaces (possibly followed by other switches) */
3108 for (e = p; *e && !isSPACE(*e); e++) ;
3112 } while (*p && *p != '-');
3113 e = savepvn(s, e-s);
3114 incpush(e, TRUE, TRUE, FALSE, FALSE);
3121 Perl_croak(aTHX_ "No directory specified for -I");
3127 SvREFCNT_dec(PL_ors_sv);
3133 PL_ors_sv = newSVpvs("\n");
3134 numlen = 3 + (*s == '0');
3135 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3139 if (RsPARA(PL_rs)) {
3140 PL_ors_sv = newSVpvs("\n\n");
3143 PL_ors_sv = newSVsv(PL_rs);
3148 forbid_setid('M', FALSE); /* XXX ? */
3151 forbid_setid('m', FALSE); /* XXX ? */
3156 const char *use = "use ";
3157 /* -M-foo == 'no foo' */
3158 /* Leading space on " no " is deliberate, to make both
3159 possibilities the same length. */
3160 if (*s == '-') { use = " no "; ++s; }
3161 sv = newSVpvn(use,4);
3163 /* We allow -M'Module qw(Foo Bar)' */
3164 while(isALNUM(*s) || *s==':') ++s;
3165 end = s + strlen(s);
3167 sv_catpvn(sv, start, end - start);
3168 if (*(start-1) == 'm') {
3170 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3171 sv_catpvs( sv, " ()");
3175 Perl_croak(aTHX_ "Module name required with -%c option",
3177 sv_catpvn(sv, start, s-start);
3178 /* Use NUL as q''-delimiter. */
3179 sv_catpvs(sv, " split(/,/,q\0");
3181 sv_catpvn(sv, s, end - s);
3182 sv_catpvs(sv, "\0)");
3185 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3188 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3199 forbid_setid('s', FALSE);
3200 PL_doswitches = TRUE;
3214 #ifdef MACOS_TRADITIONAL
3215 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3217 PL_do_undump = TRUE;
3225 if (!sv_derived_from(PL_patchlevel, "version"))
3226 upg_version(PL_patchlevel, TRUE);
3228 PerlIO_printf(PerlIO_stdout(),
3229 Perl_form(aTHX_ "\nThis is perl, %"SVf
3230 #ifdef PERL_PATCHNUM
3231 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3234 SVfARG(vstringify(PL_patchlevel)),
3237 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3238 PerlIO_printf(PerlIO_stdout(),
3239 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3240 SVfARG(vstringify(PL_patchlevel))));
3241 PerlIO_printf(PerlIO_stdout(),
3242 Perl_form(aTHX_ " built under %s at %s %s\n",
3243 OSNAME, __DATE__, __TIME__));
3244 PerlIO_printf(PerlIO_stdout(),
3245 Perl_form(aTHX_ " OS Specific Release: %s\n",
3249 #if defined(LOCAL_PATCH_COUNT)
3250 if (LOCAL_PATCH_COUNT > 0)
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\n(with %d registered patch%s, "
3253 "see perl -V for more detail)",
3255 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3258 PerlIO_printf(PerlIO_stdout(),
3259 "\n\nCopyright 1987-2007, Larry Wall\n");
3260 #ifdef MACOS_TRADITIONAL
3261 PerlIO_printf(PerlIO_stdout(),
3262 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3263 "maintained by Chris Nandor\n");
3266 PerlIO_printf(PerlIO_stdout(),
3267 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3270 PerlIO_printf(PerlIO_stdout(),
3271 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3272 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3275 PerlIO_printf(PerlIO_stdout(),
3276 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3277 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "atariST series port, ++jrb bammi@cadence.com\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3296 PerlIO_printf(PerlIO_stdout(),
3297 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3300 PerlIO_printf(PerlIO_stdout(),
3301 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3304 PerlIO_printf(PerlIO_stdout(),
3305 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3308 PerlIO_printf(PerlIO_stdout(),
3309 "MiNT port by Guido Flohr, 1997-1999\n");
3312 PerlIO_printf(PerlIO_stdout(),
3313 "EPOC port by Olaf Flebbe, 1999-2002\n");
3316 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3317 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3320 #ifdef __SYMBIAN32__
3321 PerlIO_printf(PerlIO_stdout(),
3322 "Symbian port by Nokia, 2004-2005\n");
3324 #ifdef BINARY_BUILD_NOTICE
3325 BINARY_BUILD_NOTICE;
3327 PerlIO_printf(PerlIO_stdout(),
3329 Perl may be copied only under the terms of either the Artistic License or the\n\
3330 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3331 Complete documentation for Perl, including FAQ lists, should be found on\n\
3332 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3333 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3336 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3337 PL_dowarn |= G_WARN_ON;
3342 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3343 if (!specialWARN(PL_compiling.cop_warnings))
3344 PerlMemShared_free(PL_compiling.cop_warnings);
3345 PL_compiling.cop_warnings = pWARN_ALL ;
3349 PL_dowarn = G_WARN_ALL_OFF;
3350 if (!specialWARN(PL_compiling.cop_warnings))
3351 PerlMemShared_free(PL_compiling.cop_warnings);
3352 PL_compiling.cop_warnings = pWARN_NONE ;
3357 if (s[1] == '-') /* Additional switches on #! line. */
3362 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3368 #ifdef ALTERNATE_SHEBANG
3369 case 'S': /* OS/2 needs -S on "extproc" line. */
3373 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3378 /* compliments of Tom Christiansen */
3380 /* unexec() can be found in the Gnu emacs distribution */
3381 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3384 Perl_my_unexec(pTHX)
3386 PERL_UNUSED_CONTEXT;
3388 SV * prog = newSVpv(BIN_EXP, 0);
3389 SV * file = newSVpv(PL_origfilename, 0);
3393 sv_catpvs(prog, "/perl");
3394 sv_catpvs(file, ".perldump");
3396 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3397 /* unexec prints msg to stderr in case of failure */
3398 PerlProc_exit(status);
3401 # include <lib$routines.h>
3402 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3403 # elif defined(WIN32) || defined(__CYGWIN__)
3404 Perl_croak(aTHX_ "dump is not supported");
3406 ABORT(); /* for use with undump */
3411 /* initialize curinterp */
3417 # define PERLVAR(var,type)
3418 # define PERLVARA(var,n,type)
3419 # if defined(PERL_IMPLICIT_CONTEXT)
3420 # define PERLVARI(var,type,init) aTHX->var = init;
3421 # define PERLVARIC(var,type,init) aTHX->var = init;
3423 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3424 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3426 # include "intrpvar.h"
3432 # define PERLVAR(var,type)
3433 # define PERLVARA(var,n,type)
3434 # define PERLVARI(var,type,init) PL_##var = init;
3435 # define PERLVARIC(var,type,init) PL_##var = init;
3436 # include "intrpvar.h"
3443 /* As these are inside a structure, PERLVARI isn't capable of initialising
3445 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3446 PL_reg_poscache = PL_reg_starttry = NULL;
3450 S_init_main_stash(pTHX)
3455 PL_curstash = PL_defstash = newHV();
3456 /* We know that the string "main" will be in the global shared string
3457 table, so it's a small saving to use it rather than allocate another
3459 PL_curstname = newSVpvs_share("main");
3460 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3461 /* If we hadn't caused another reference to "main" to be in the shared
3462 string table above, then it would be worth reordering these two,
3463 because otherwise all we do is delete "main" from it as a consequence
3464 of the SvREFCNT_dec, only to add it again with hv_name_set */
3465 SvREFCNT_dec(GvHV(gv));
3466 hv_name_set(PL_defstash, "main", 4, 0);
3467 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3469 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3471 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3472 GvMULTI_on(PL_incgv);
3473 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3474 GvMULTI_on(PL_hintgv);
3475 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3476 SvREFCNT_inc_simple_void(PL_defgv);
3477 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3478 SvREFCNT_inc_simple_void(PL_errgv);
3479 GvMULTI_on(PL_errgv);
3480 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3481 GvMULTI_on(PL_replgv);
3482 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3483 #ifdef PERL_DONT_CREATE_GVSV
3486 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3487 sv_setpvn(ERRSV, "", 0);
3488 PL_curstash = PL_defstash;
3489 CopSTASH_set(&PL_compiling, PL_defstash);
3490 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3491 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3493 /* We must init $/ before switches are processed. */
3494 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3498 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3499 bool *suidscript, PerlIO **rsfpp)
3505 PL_origfilename = savepvs("-e");
3508 /* if find_script() returns, it returns a malloc()-ed value */
3509 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3511 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3512 const char *s = scriptname + 8;
3518 * Tell apart "normal" usage of fdscript, e.g.
3519 * with bash on FreeBSD:
3520 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3521 * from usage in suidperl.
3522 * Does any "normal" usage leave garbage after the number???
3523 * Is it a mistake to use a similar /dev/fd/ construct for
3528 * Be supersafe and do some sanity-checks.
3529 * Still, can we be sure we got the right thing?
3532 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3535 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3537 scriptname = savepv(s + 1);
3538 Safefree(PL_origfilename);
3539 PL_origfilename = (char *)scriptname;
3544 CopFILE_free(PL_curcop);
3545 CopFILE_set(PL_curcop, PL_origfilename);
3546 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3547 scriptname = (char *)"";
3548 if (fdscript >= 0) {
3549 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3550 # if defined(HAS_FCNTL) && defined(F_SETFD)
3552 /* ensure close-on-exec */
3553 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3558 Perl_croak(aTHX_ "sperl needs fd script\n"
3559 "You should not call sperl directly; do you need to "
3560 "change a #! line\nfrom sperl to perl?\n");
3563 * Do not open (or do other fancy stuff) while setuid.
3564 * Perl does the open, and hands script to suidperl on a fd;
3565 * suidperl only does some checks, sets up UIDs and re-execs
3566 * perl with that fd as it has always done.
3570 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3573 else if (!*scriptname) {
3574 forbid_setid(0, *suidscript);
3575 *rsfpp = PerlIO_stdin();
3578 #ifdef FAKE_BIT_BUCKET
3579 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3580 * is called) and still have the "-e" work. (Believe it or not,
3581 * a /dev/null is required for the "-e" to work because source
3582 * filter magic is used to implement it. ) This is *not* a general
3583 * replacement for a /dev/null. What we do here is create a temp
3584 * file (an empty file), open up that as the script, and then
3585 * immediately close and unlink it. Close enough for jazz. */
3586 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3587 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3588 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3589 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3590 FAKE_BIT_BUCKET_TEMPLATE
3592 const char * const err = "Failed to create a fake bit bucket";
3593 if (strEQ(scriptname, BIT_BUCKET)) {
3594 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3595 int tmpfd = mkstemp(tmpname);
3597 scriptname = tmpname;
3600 Perl_croak(aTHX_ err);
3603 scriptname = mktemp(tmpname);
3605 Perl_croak(aTHX_ err);
3610 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3611 #ifdef FAKE_BIT_BUCKET
3612 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3613 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3614 && strlen(scriptname) == sizeof(tmpname) - 1) {
3617 scriptname = BIT_BUCKET;
3619 # if defined(HAS_FCNTL) && defined(F_SETFD)
3621 /* ensure close-on-exec */
3622 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3625 #endif /* IAMSUID */
3627 /* PSz 16 Sep 03 Keep neat error message */
3629 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3631 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3632 CopFILE(PL_curcop), Strerror(errno));
3638 * I_SYSSTATVFS HAS_FSTATVFS
3640 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3641 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3642 * here so that metaconfig picks them up. */
3646 S_fd_on_nosuid_fs(pTHX_ int fd)
3649 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3650 * but is needed also on machines without setreuid.
3651 * Seems safe enough to run as root.
3653 int check_okay = 0; /* able to do all the required sys/libcalls */
3654 int on_nosuid = 0; /* the fd is on a nosuid fs */
3656 * Need to check noexec also: nosuid might not be set, the average
3657 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3659 int on_noexec = 0; /* the fd is on a noexec fs */
3662 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3663 * fstatvfs() is UNIX98.
3664 * fstatfs() is 4.3 BSD.
3665 * ustat()+getmnt() is pre-4.3 BSD.
3666 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3667 * an irrelevant filesystem while trying to reach the right one.
3670 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3672 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3673 defined(HAS_FSTATVFS)
3674 # define FD_ON_NOSUID_CHECK_OKAY
3675 struct statvfs stfs;
3677 check_okay = fstatvfs(fd, &stfs) == 0;
3678 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3680 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3681 on platforms where it is present. */
3682 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3684 # endif /* fstatvfs */
3686 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3687 defined(PERL_MOUNT_NOSUID) && \
3688 defined(PERL_MOUNT_NOEXEC) && \
3689 defined(HAS_FSTATFS) && \
3690 defined(HAS_STRUCT_STATFS) && \
3691 defined(HAS_STRUCT_STATFS_F_FLAGS)
3692 # define FD_ON_NOSUID_CHECK_OKAY
3695 check_okay = fstatfs(fd, &stfs) == 0;
3696 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3697 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3698 # endif /* fstatfs */
3700 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3701 defined(PERL_MOUNT_NOSUID) && \
3702 defined(PERL_MOUNT_NOEXEC) && \
3703 defined(HAS_FSTAT) && \
3704 defined(HAS_USTAT) && \
3705 defined(HAS_GETMNT) && \
3706 defined(HAS_STRUCT_FS_DATA) && \
3708 # define FD_ON_NOSUID_CHECK_OKAY
3711 if (fstat(fd, &fdst) == 0) {
3713 if (ustat(fdst.st_dev, &us) == 0) {
3715 /* NOSTAT_ONE here because we're not examining fields which
3716 * vary between that case and STAT_ONE. */
3717 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3718 size_t cmplen = sizeof(us.f_fname);
3719 if (sizeof(fsd.fd_req.path) < cmplen)
3720 cmplen = sizeof(fsd.fd_req.path);
3721 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3722 fdst.st_dev == fsd.fd_req.dev) {
3724 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3725 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3730 # endif /* fstat+ustat+getmnt */
3732 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3733 defined(HAS_GETMNTENT) && \
3734 defined(HAS_HASMNTOPT) && \
3735 defined(MNTOPT_NOSUID) && \
3736 defined(MNTOPT_NOEXEC)
3737 # define FD_ON_NOSUID_CHECK_OKAY
3738 FILE *mtab = fopen("/etc/mtab", "r");
3739 struct mntent *entry;
3742 if (mtab && (fstat(fd, &stb) == 0)) {
3743 while (entry = getmntent(mtab)) {
3744 if (stat(entry->mnt_dir, &fsb) == 0
3745 && fsb.st_dev == stb.st_dev)
3747 /* found the filesystem */
3749 if (hasmntopt(entry, MNTOPT_NOSUID))
3751 if (hasmntopt(entry, MNTOPT_NOEXEC))
3754 } /* A single fs may well fail its stat(). */
3759 # endif /* getmntent+hasmntopt */
3762 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3764 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3766 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3767 return ((!check_okay) || on_nosuid || on_noexec);
3769 #endif /* IAMSUID */
3773 S_validate_suid(pTHX_ const char *validarg,
3775 const char *scriptname,
3781 SV *linestr_sv, PerlIO *rsfp)
3786 /* do we need to emulate setuid on scripts? */
3788 /* This code is for those BSD systems that have setuid #! scripts disabled
3789 * in the kernel because of a security problem. Merely defining DOSUID
3790 * in perl will not fix that problem, but if you have disabled setuid
3791 * scripts in the kernel, this will attempt to emulate setuid and setgid
3792 * on scripts that have those now-otherwise-useless bits set. The setuid
3793 * root version must be called suidperl or sperlN.NNN. If regular perl
3794 * discovers that it has opened a setuid script, it calls suidperl with
3795 * the same argv that it had. If suidperl finds that the script it has
3796 * just opened is NOT setuid root, it sets the effective uid back to the
3797 * uid. We don't just make perl setuid root because that loses the
3798 * effective uid we had before invoking perl, if it was different from the
3801 * Description/comments above do not match current workings:
3802 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3803 * suidperl called with script open and name changed to /dev/fd/N/X;
3804 * suidperl croaks if script is not setuid;
3805 * making perl setuid would be a huge security risk (and yes, that
3806 * would lose any euid we might have had).
3808 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3809 * be defined in suidperl only. suidperl must be setuid root. The
3810 * Configure script will set this up for you if you want it.
3813 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3814 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3815 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3817 const char *linestr;
3821 if (fdscript < 0 || !suidscript)
3822 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3824 * Since the script is opened by perl, not suidperl, some of these
3825 * checks are superfluous. Leaving them in probably does not lower
3829 * Do checks even for systems with no HAS_SETREUID.
3830 * We used to swap, then re-swap UIDs with
3831 # ifdef HAS_SETREUID
3832 if (setreuid(PL_euid,PL_uid) < 0
3833 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3834 Perl_croak(aTHX_ "Can't swap uid and euid");
3836 # ifdef HAS_SETREUID
3837 if (setreuid(PL_uid,PL_euid) < 0
3838 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3839 Perl_croak(aTHX_ "Can't reswap uid and euid");
3843 /* On this access check to make sure the directories are readable,
3844 * there is actually a small window that the user could use to make
3845 * filename point to an accessible directory. So there is a faint
3846 * chance that someone could execute a setuid script down in a
3847 * non-accessible directory. I don't know what to do about that.
3848 * But I don't think it's too important. The manual lies when
3849 * it says access() is useful in setuid programs.
3851 * So, access() is pretty useless... but not harmful... do anyway.
3853 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3854 Perl_croak(aTHX_ "Can't access() script\n");
3857 /* If we can swap euid and uid, then we can determine access rights
3858 * with a simple stat of the file, and then compare device and
3859 * inode to make sure we did stat() on the same file we opened.
3860 * Then we just have to make sure he or she can execute it.
3863 * As the script is opened by perl, not suidperl, we do not need to
3864 * care much about access rights.
3866 * The 'script changed' check is needed, or we can get lied to
3867 * about $0 with e.g.
3868 * suidperl /dev/fd/4//bin/x 4<setuidscript
3869 * Without HAS_SETREUID, is it safe to stat() as root?
3871 * Are there any operating systems that pass /dev/fd/xxx for setuid
3872 * scripts, as suggested/described in perlsec(1)? Surely they do not
3873 * pass the script name as we do, so the "script changed" test would
3874 * fail for them... but we never get here with
3875 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3877 * This is one place where we must "lie" about return status: not
3878 * say if the stat() failed. We are doing this as root, and could
3879 * be tricked into reporting existence or not of files that the
3880 * "plain" user cannot even see.
3884 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3885 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3886 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3887 Perl_croak(aTHX_ "Setuid script changed\n");
3891 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3892 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3895 * We used to do this check as the "plain" user (after swapping
3896 * UIDs). But the check for nosuid and noexec filesystem is needed,
3897 * and should be done even without HAS_SETREUID. (Maybe those
3898 * operating systems do not have such mount options anyway...)
3899 * Seems safe enough to do as root.
3901 # if !defined(NO_NOSUID_CHECK)
3902 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3903 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3906 # endif /* IAMSUID */
3908 if (!S_ISREG(PL_statbuf.st_mode)) {
3909 Perl_croak(aTHX_ "Setuid script not plain file\n");
3911 if (PL_statbuf.st_mode & S_IWOTH)
3912 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3913 PL_doswitches = FALSE; /* -s is insecure in suid */
3914 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3915 CopLINE_inc(PL_curcop);
3916 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3917 Perl_croak(aTHX_ "No #! line");
3918 linestr = SvPV_nolen_const(linestr_sv);
3919 /* required even on Sys V */
3920 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
3921 Perl_croak(aTHX_ "No #! line");
3925 /* Sanity check on line length */
3926 s_end = s + strlen(s);
3927 if (s_end == s || (s_end - s) > 4000)
3928 Perl_croak(aTHX_ "Very long #! line");
3929 /* Allow more than a single space after #! */
3930 while (isSPACE(*s)) s++;
3931 /* Sanity check on buffer end */
3932 while ((*s) && !isSPACE(*s)) s++;
3933 for (s2 = s; (s2 > linestr &&
3934 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
3935 || s2[-1] == '-')); s2--) ;
3936 /* Sanity check on buffer start */
3937 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
3938 (s-9 < linestr || strnNE(s-9,"perl",4)) )
3939 Perl_croak(aTHX_ "Not a perl script");
3940 while (*s == ' ' || *s == '\t') s++;
3942 * #! arg must be what we saw above. They can invoke it by
3943 * mentioning suidperl explicitly, but they may not add any strange
3944 * arguments beyond what #! says if they do invoke suidperl that way.
3947 * The way validarg was set up, we rely on the kernel to start
3948 * scripts with argv[1] set to contain all #! line switches (the
3952 * Check that we got all the arguments listed in the #! line (not
3953 * just that there are no extraneous arguments). Might not matter
3954 * much, as switches from #! line seem to be acted upon (also), and
3955 * so may be checked and trapped in perl. But, security checks must
3956 * be done in suidperl and not deferred to perl. Note that suidperl
3957 * does not get around to parsing (and checking) the switches on
3958 * the #! line (but execs perl sooner).
3959 * Allow (require) a trailing newline (which may be of two
3960 * characters on some architectures?) (but no other trailing
3963 len = strlen(validarg);
3964 if (strEQ(validarg," PHOOEY ") ||
3965 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
3966 !((s_end - s) == len+1
3967 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
3968 Perl_croak(aTHX_ "Args must match #! line");
3972 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
3973 PL_euid == PL_statbuf.st_uid)
3975 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3976 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
3977 # endif /* IAMSUID */
3980 PL_euid) { /* oops, we're not the setuid root perl */
3982 * When root runs a setuid script, we do not go through the same
3983 * steps of execing sperl and then perl with fd scripts, but
3984 * simply set up UIDs within the same perl invocation; so do
3985 * not have the same checks (on options, whatever) that we have
3986 * for plain users. No problem really: would have to be a script
3987 * that does not actually work for plain users; and if root is
3988 * foolish and can be persuaded to run such an unsafe script, he
3989 * might run also non-setuid ones, and deserves what he gets.
3991 * Or, we might drop the PL_euid check above (and rely just on
3992 * fdscript to avoid loops), and do the execs
3998 * Pass fd script to suidperl.
3999 * Exec suidperl, substituting fd script for scriptname.
4000 * Pass script name as "subdir" of fd, which perl will grok;
4001 * in fact will use that to distinguish this from "normal"
4002 * usage, see comments above.
4004 PerlIO_rewind(rsfp);
4005 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4006 /* PSz 27 Feb 04 Sanity checks on scriptname */
4007 if ((!scriptname) || (!*scriptname) ) {
4008 Perl_croak(aTHX_ "No setuid script name\n");
4010 if (*scriptname == '-') {
4011 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4012 /* Or we might confuse it with an option when replacing
4013 * name in argument list, below (though we do pointer, not
4014 * string, comparisons).
4017 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4018 if (!PL_origargv[which]) {
4019 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4021 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4022 PerlIO_fileno(rsfp), PL_origargv[which]));
4023 # if defined(HAS_FCNTL) && defined(F_SETFD)
4024 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4027 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4028 (int)PERL_REVISION, (int)PERL_VERSION,
4029 (int)PERL_SUBVERSION), PL_origargv);
4031 # endif /* IAMSUID */
4032 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4035 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4037 * This seems back to front: we try HAS_SETEGID first; if not available
4038 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4039 * in the sense that we only want to set EGID; but are there any machines
4040 * with either of the latter, but not the former? Same with UID, later.
4043 (void)setegid(PL_statbuf.st_gid);
4045 # ifdef HAS_SETREGID
4046 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4048 # ifdef HAS_SETRESGID
4049 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4051 PerlProc_setgid(PL_statbuf.st_gid);
4055 if (PerlProc_getegid() != PL_statbuf.st_gid)
4056 Perl_croak(aTHX_ "Can't do setegid!\n");
4058 if (PL_statbuf.st_mode & S_ISUID) {
4059 if (PL_statbuf.st_uid != PL_euid)
4061 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4063 # ifdef HAS_SETREUID
4064 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4066 # ifdef HAS_SETRESUID
4067 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4069 PerlProc_setuid(PL_statbuf.st_uid);
4073 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4074 Perl_croak(aTHX_ "Can't do seteuid!\n");
4076 else if (PL_uid) { /* oops, mustn't run as root */
4078 (void)seteuid((Uid_t)PL_uid);
4080 # ifdef HAS_SETREUID
4081 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4083 # ifdef HAS_SETRESUID
4084 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4086 PerlProc_setuid((Uid_t)PL_uid);
4090 if (PerlProc_geteuid() != PL_uid)
4091 Perl_croak(aTHX_ "Can't do seteuid!\n");
4094 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4095 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4098 else if (fdscript < 0 || !suidscript)
4099 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4100 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4102 /* PSz 16 Sep 03 Keep neat error message */
4103 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4106 /* We absolutely must clear out any saved ids here, so we */
4107 /* exec the real perl, substituting fd script for scriptname. */
4108 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4110 * It might be thought that using setresgid and/or setresuid (changed to
4111 * set the saved IDs) above might obviate the need to exec, and we could
4112 * go on to "do the perl thing".
4114 * Is there such a thing as "saved GID", and is that set for setuid (but
4115 * not setgid) execution like suidperl? Without exec, it would not be
4116 * cleared for setuid (but not setgid) scripts (or might need a dummy
4119 * We need suidperl to do the exact same argument checking that perl
4120 * does. Thus it cannot be very small; while it could be significantly
4121 * smaller, it is safer (simpler?) to make it essentially the same
4122 * binary as perl (but they are not identical). - Maybe could defer that
4123 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4124 * but prefer to do thorough checks in suidperl itself. Such deferral
4125 * would make suidperl security rely on perl, a design no-no.
4127 * Setuid things should be short and simple, thus easy to understand and
4128 * verify. They should do their "own thing", without influence by
4129 * attackers. It may help if their internal execution flow is fixed,
4130 * regardless of platform: it may be best to exec anyway.
4132 * Suidperl should at least be conceptually simple: a wrapper only,
4133 * never to do any real perl. Maybe we should put
4135 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4137 * into the perly bits.
4139 PerlIO_rewind(rsfp);
4140 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4142 * Keep original arguments: suidperl already has fd script.
4144 # if defined(HAS_FCNTL) && defined(F_SETFD)
4145 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4148 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4149 (int)PERL_REVISION, (int)PERL_VERSION,
4150 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4152 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4153 # endif /* IAMSUID */
4158 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4159 /* Don't even need this function. */
4162 S_validate_suid(pTHX_ PerlIO *rsfp)
4164 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4165 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4166 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4167 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4169 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4172 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4173 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4174 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4175 /* not set-id, must be wrapped */
4178 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4182 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4186 register const char *s2;
4187 #ifdef MACOS_TRADITIONAL
4191 /* skip forward in input to the real script? */
4193 #ifdef MACOS_TRADITIONAL
4194 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4196 while (PL_doextract || gMacPerl_AlwaysExtract) {
4197 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4198 if (!gMacPerl_AlwaysExtract)
4199 Perl_croak(aTHX_ "No Perl script found in input\n");
4201 if (PL_doextract) /* require explicit override ? */
4202 if (!OverrideExtract(PL_origfilename))
4203 Perl_croak(aTHX_ "User aborted script\n");
4205 PL_doextract = FALSE;
4207 /* Pater peccavi, file does not have #! */
4208 PerlIO_rewind(rsfp);
4213 while (PL_doextract) {
4214 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4215 Perl_croak(aTHX_ "No Perl script found in input\n");
4218 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4219 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4220 PL_doextract = FALSE;
4221 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4223 while (*s == ' ' || *s == '\t') s++;
4225 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4226 || s2[-1] == '_') s2--;
4227 if (strnEQ(s2-4,"perl",4))
4228 while ((s = moreswitches(s)))
4231 #ifdef MACOS_TRADITIONAL
4232 /* We are always searching for the #!perl line in MacPerl,
4233 * so if we find it, still keep the line count correct
4234 * by counting lines we already skipped over
4236 for (; maclines > 0 ; maclines--)
4237 PerlIO_ungetc(rsfp, '\n');
4241 /* gMacPerl_AlwaysExtract is false in MPW tool */
4242 } else if (gMacPerl_AlwaysExtract) {
4254 PL_uid = PerlProc_getuid();
4255 PL_euid = PerlProc_geteuid();
4256 PL_gid = PerlProc_getgid();
4257 PL_egid = PerlProc_getegid();
4259 PL_uid |= PL_gid << 16;
4260 PL_euid |= PL_egid << 16;
4262 /* Should not happen: */
4263 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4264 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4267 * Should go by suidscript, not uid!=euid: why disallow
4268 * system("ls") in scripts run from setuid things?
4269 * Or, is this run before we check arguments and set suidscript?
4270 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4271 * (We never have suidscript, can we be sure to have fdscript?)
4272 * Or must then go by UID checks? See comments in forbid_setid also.
4276 /* This is used very early in the lifetime of the program,
4277 * before even the options are parsed, so PL_tainting has
4278 * not been initialized properly. */
4280 Perl_doing_taint(int argc, char *argv[], char *envp[])
4282 #ifndef PERL_IMPLICIT_SYS
4283 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4284 * before we have an interpreter-- and the whole point of this
4285 * function is to be called at such an early stage. If you are on
4286 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4287 * "tainted because running with altered effective ids', you'll
4288 * have to add your own checks somewhere in here. The two most
4289 * known samples of 'implicitness' are Win32 and NetWare, neither
4290 * of which has much of concept of 'uids'. */
4291 int uid = PerlProc_getuid();
4292 int euid = PerlProc_geteuid();
4293 int gid = PerlProc_getgid();
4294 int egid = PerlProc_getegid();
4301 if (uid && (euid != uid || egid != gid))
4303 #endif /* !PERL_IMPLICIT_SYS */
4304 /* This is a really primitive check; environment gets ignored only
4305 * if -T are the first chars together; otherwise one gets
4306 * "Too late" message. */
4307 if ( argc > 1 && argv[1][0] == '-'
4308 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4313 /* Passing the flag as a single char rather than a string is a slight space
4314 optimisation. The only message that isn't /^-.$/ is
4315 "program input from stdin", which is substituted in place of '\0', which
4316 could never be a command line flag. */
4318 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4321 char string[3] = "-x";
4322 const char *message = "program input from stdin";
4329 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4330 if (PL_euid != PL_uid)
4331 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4332 if (PL_egid != PL_gid)
4333 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4334 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4336 * Checks for UID/GID above "wrong": why disallow
4337 * perl -e 'print "Hello\n"'
4338 * from within setuid things?? Simply drop them: replaced by
4339 * fdscript/suidscript and #ifdef IAMSUID checks below.
4341 * This may be too late for command-line switches. Will catch those on
4342 * the #! line, after finding the script name and setting up
4343 * fdscript/suidscript. Note that suidperl does not get around to
4344 * parsing (and checking) the switches on the #! line, but checks that
4345 * the two sets are identical.
4347 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4348 * instead, or would that be "too late"? (We never have suidscript, can
4349 * we be sure to have fdscript?)
4351 * Catch things with suidscript (in descendant of suidperl), even with
4352 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4353 * below; but I am paranoid.
4355 * Also see comments about root running a setuid script, elsewhere.
4358 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4360 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4361 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4362 #endif /* IAMSUID */
4366 Perl_init_debugger(pTHX)
4369 HV * const ostash = PL_curstash;
4371 PL_curstash = PL_debstash;
4372 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4374 AvREAL_off(PL_dbargs);
4375 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4376 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4377 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4378 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4379 sv_setiv(PL_DBsingle, 0);
4380 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4381 sv_setiv(PL_DBtrace, 0);
4382 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4383 sv_setiv(PL_DBsignal, 0);
4384 PL_curstash = ostash;
4387 #ifndef STRESS_REALLOC
4388 #define REASONABLE(size) (size)
4390 #define REASONABLE(size) (1) /* unreasonable */
4394 Perl_init_stacks(pTHX)
4397 /* start with 128-item stack and 8K cxstack */
4398 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4399 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4400 PL_curstackinfo->si_type = PERLSI_MAIN;
4401 PL_curstack = PL_curstackinfo->si_stack;
4402 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4404 PL_stack_base = AvARRAY(PL_curstack);
4405 PL_stack_sp = PL_stack_base;
4406 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4408 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4411 PL_tmps_max = REASONABLE(128);
4413 Newx(PL_markstack,REASONABLE(32),I32);
4414 PL_markstack_ptr = PL_markstack;
4415 PL_markstack_max = PL_markstack + REASONABLE(32);
4419 Newx(PL_scopestack,REASONABLE(32),I32);
4420 PL_scopestack_ix = 0;
4421 PL_scopestack_max = REASONABLE(32);
4423 Newx(PL_savestack,REASONABLE(128),ANY);
4424 PL_savestack_ix = 0;
4425 PL_savestack_max = REASONABLE(128);
4434 while (PL_curstackinfo->si_next)
4435 PL_curstackinfo = PL_curstackinfo->si_next;
4436 while (PL_curstackinfo) {
4437 PERL_SI *p = PL_curstackinfo->si_prev;
4438 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4439 Safefree(PL_curstackinfo->si_cxstack);
4440 Safefree(PL_curstackinfo);
4441 PL_curstackinfo = p;
4443 Safefree(PL_tmps_stack);
4444 Safefree(PL_markstack);
4445 Safefree(PL_scopestack);
4446 Safefree(PL_savestack);
4451 S_init_predump_symbols(pTHX)
4457 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4458 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4459 GvMULTI_on(PL_stdingv);
4460 io = GvIOp(PL_stdingv);
4461 IoTYPE(io) = IoTYPE_RDONLY;
4462 IoIFP(io) = PerlIO_stdin();
4463 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4465 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4467 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4470 IoTYPE(io) = IoTYPE_WRONLY;
4471 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4473 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4475 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4477 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4478 GvMULTI_on(PL_stderrgv);
4479 io = GvIOp(PL_stderrgv);
4480 IoTYPE(io) = IoTYPE_WRONLY;
4481 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4482 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4484 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4486 PL_statname = newSV(0); /* last filename we did stat on */
4488 Safefree(PL_osname);
4489 PL_osname = savepv(OSNAME);
4493 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4496 argc--,argv++; /* skip name of script */
4497 if (PL_doswitches) {
4498 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4502 if (argv[0][1] == '-' && !argv[0][2]) {
4506 if ((s = strchr(argv[0], '='))) {
4507 const char *const start_name = argv[0] + 1;
4508 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4509 TRUE, SVt_PV)), s + 1);
4512 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4515 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4516 GvMULTI_on(PL_argvgv);
4517 (void)gv_AVadd(PL_argvgv);
4518 av_clear(GvAVn(PL_argvgv));
4519 for (; argc > 0; argc--,argv++) {
4520 SV * const sv = newSVpv(argv[0],0);
4521 av_push(GvAVn(PL_argvgv),sv);
4522 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4523 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4526 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4527 (void)sv_utf8_decode(sv);
4533 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4538 PL_toptarget = newSV_type(SVt_PVFM);
4539 sv_setpvn(PL_toptarget, "", 0);
4540 PL_bodytarget = newSV_type(SVt_PVFM);
4541 sv_setpvn(PL_bodytarget, "", 0);
4542 PL_formtarget = PL_bodytarget;
4546 init_argv_symbols(argc,argv);
4548 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4549 #ifdef MACOS_TRADITIONAL
4550 /* $0 is not majick on a Mac */
4551 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4553 sv_setpv(GvSV(tmpgv),PL_origfilename);
4554 magicname("0", "0", 1);
4557 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4559 bool env_is_not_environ;
4560 GvMULTI_on(PL_envgv);
4561 hv = GvHVn(PL_envgv);
4562 hv_magic(hv, NULL, PERL_MAGIC_env);
4564 #ifdef USE_ENVIRON_ARRAY
4565 /* Note that if the supplied env parameter is actually a copy
4566 of the global environ then it may now point to free'd memory
4567 if the environment has been modified since. To avoid this
4568 problem we treat env==NULL as meaning 'use the default'
4572 env_is_not_environ = env != environ;
4573 if (env_is_not_environ
4574 # ifdef USE_ITHREADS
4575 && PL_curinterp == aTHX
4584 for (; *env; env++) {
4585 if (!(s = strchr(*env,'=')) || s == *env)
4587 #if defined(MSDOS) && !defined(DJGPP)
4592 sv = newSVpv(s+1, 0);
4593 (void)hv_store(hv, *env, s - *env, sv, 0);
4594 if (env_is_not_environ)
4598 #endif /* USE_ENVIRON_ARRAY */
4599 #endif /* !PERL_MICRO */
4602 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4603 SvREADONLY_off(GvSV(tmpgv));
4604 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4605 SvREADONLY_on(GvSV(tmpgv));
4607 #ifdef THREADS_HAVE_PIDS
4608 PL_ppid = (IV)getppid();
4611 /* touch @F array to prevent spurious warnings 20020415 MJD */
4613 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4618 S_init_perllib(pTHX)
4624 s = PerlEnv_getenv("PERL5LIB");
4626 * It isn't possible to delete an environment variable with
4627 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4628 * case we treat PERL5LIB as undefined if it has a zero-length value.
4630 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4631 if (s && *s != '\0')
4635 incpush(s, TRUE, TRUE, TRUE, FALSE);
4637 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4639 /* Treat PERL5?LIB as a possible search list logical name -- the
4640 * "natural" VMS idiom for a Unix path string. We allow each
4641 * element to be a set of |-separated directories for compatibility.
4645 if (my_trnlnm("PERL5LIB",buf,0))
4646 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4648 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4652 /* Use the ~-expanded versions of APPLLIB (undocumented),
4653 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4656 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4660 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4662 #ifdef MACOS_TRADITIONAL
4665 SV * privdir = newSV(0);
4666 char * macperl = PerlEnv_getenv("MACPERL");
4671 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4672 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4673 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4674 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4675 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4676 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4678 SvREFCNT_dec(privdir);
4681 incpush(":", FALSE, FALSE, TRUE, FALSE);
4684 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4687 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4689 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4693 /* sitearch is always relative to sitelib on Windows for
4694 * DLL-based path intuition to work correctly */
4695 # if !defined(WIN32)
4696 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4702 /* this picks up sitearch as well */
4703 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4705 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4709 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4710 /* Search for version-specific dirs below here */
4711 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4714 #ifdef PERL_VENDORARCH_EXP
4715 /* vendorarch is always relative to vendorlib on Windows for
4716 * DLL-based path intuition to work correctly */
4717 # if !defined(WIN32)
4718 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4722 #ifdef PERL_VENDORLIB_EXP
4724 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4726 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4730 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4731 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4734 #ifdef PERL_OTHERLIBDIRS
4735 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4739 incpush(".", FALSE, FALSE, TRUE, FALSE);
4740 #endif /* MACOS_TRADITIONAL */
4743 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4744 # define PERLLIB_SEP ';'
4747 # define PERLLIB_SEP '|'
4749 # if defined(MACOS_TRADITIONAL)
4750 # define PERLLIB_SEP ','
4752 # define PERLLIB_SEP ':'
4756 #ifndef PERLLIB_MANGLE
4757 # define PERLLIB_MANGLE(s,n) (s)
4760 /* Push a directory onto @INC if it exists.
4761 Generate a new SV if we do this, to save needing to copy the SV we push
4764 S_incpush_if_exists(pTHX_ SV *dir)
4768 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4769 S_ISDIR(tmpstatbuf.st_mode)) {
4770 av_push(GvAVn(PL_incgv), dir);
4777 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4782 const char *p = dir;
4787 if (addsubdirs || addoldvers) {
4791 /* Break at all separators */
4793 SV *libdir = newSV(0);
4796 /* skip any consecutive separators */
4798 while ( *p == PERLLIB_SEP ) {
4799 /* Uncomment the next line for PATH semantics */
4800 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4805 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4806 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4811 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4812 p = NULL; /* break out */
4814 #ifdef MACOS_TRADITIONAL
4815 if (!strchr(SvPVX(libdir), ':')) {
4818 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4820 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4821 sv_catpvs(libdir, ":");
4824 /* Do the if() outside the #ifdef to avoid warnings about an unused
4827 #ifdef PERL_RELOCATABLE_INC
4829 * Relocatable include entries are marked with a leading .../
4832 * 0: Remove that leading ".../"
4833 * 1: Remove trailing executable name (anything after the last '/')
4834 * from the perl path to give a perl prefix
4836 * While the @INC element starts "../" and the prefix ends with a real
4837 * directory (ie not . or ..) chop that real directory off the prefix
4838 * and the leading "../" from the @INC element. ie a logical "../"
4840 * Finally concatenate the prefix and the remainder of the @INC element
4841 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4842 * generates /usr/local/lib/perl5
4844 const char *libpath = SvPVX(libdir);
4845 STRLEN libpath_len = SvCUR(libdir);
4846 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4848 SV * const caret_X = get_sv("\030", 0);
4849 /* Going to use the SV just as a scratch buffer holding a C
4855 /* $^X is *the* source of taint if tainting is on, hence
4856 SvPOK() won't be true. */
4858 assert(SvPOKp(caret_X));
4859 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4861 /* Firstly take off the leading .../
4862 If all else fail we'll do the paths relative to the current
4864 sv_chop(libdir, libpath + 4);
4865 /* Don't use SvPV as we're intentionally bypassing taining,
4866 mortal copies that the mg_get of tainting creates, and
4867 corruption that seems to come via the save stack.
4868 I guess that the save stack isn't correctly set up yet. */
4869 libpath = SvPVX(libdir);
4870 libpath_len = SvCUR(libdir);
4872 /* This would work more efficiently with memrchr, but as it's
4873 only a GNU extension we'd need to probe for it and
4874 implement our own. Not hard, but maybe not worth it? */
4876 prefix = SvPVX(prefix_sv);
4877 lastslash = strrchr(prefix, '/');
4879 /* First time in with the *lastslash = '\0' we just wipe off
4880 the trailing /perl from (say) /usr/foo/bin/perl
4884 while ((*lastslash = '\0'), /* Do that, come what may. */
4885 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4886 && (lastslash = strrchr(prefix, '/')))) {
4887 if (lastslash[1] == '\0'
4888 || (lastslash[1] == '.'
4889 && (lastslash[2] == '/' /* ends "/." */
4890 || (lastslash[2] == '/'
4891 && lastslash[3] == '/' /* or "/.." */
4893 /* Prefix ends "/" or "/." or "/..", any of which
4894 are fishy, so don't do any more logical cleanup.
4898 /* Remove leading "../" from path */
4901 /* Next iteration round the loop removes the last
4902 directory name from prefix by writing a '\0' in
4903 the while clause. */
4905 /* prefix has been terminated with a '\0' to the correct
4906 length. libpath points somewhere into the libdir SV.
4907 We need to join the 2 with '/' and drop the result into
4909 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4910 SvREFCNT_dec(libdir);
4911 /* And this is the new libdir. */
4914 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4915 /* Need to taint reloccated paths if running set ID */
4916 SvTAINTED_on(libdir);
4919 SvREFCNT_dec(prefix_sv);
4924 * BEFORE pushing libdir onto @INC we may first push version- and
4925 * archname-specific sub-directories.
4927 if (addsubdirs || addoldvers) {
4928 #ifdef PERL_INC_VERSION_LIST
4929 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4930 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4931 const char * const *incver;
4937 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4939 while (unix[len-1] == '/') len--; /* Cosmetic */
4940 sv_usepvn(libdir,unix,len);
4943 PerlIO_printf(Perl_error_log,
4944 "Failed to unixify @INC element \"%s\"\n",
4948 #ifdef MACOS_TRADITIONAL
4949 #define PERL_AV_SUFFIX_FMT ""
4950 #define PERL_ARCH_FMT "%s:"
4951 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
4953 #define PERL_AV_SUFFIX_FMT "/"
4954 #define PERL_ARCH_FMT "/%s"
4955 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
4957 /* .../version/archname if -d .../version/archname */
4958 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
4960 (int)PERL_REVISION, (int)PERL_VERSION,
4961 (int)PERL_SUBVERSION, ARCHNAME);
4962 subdir = S_incpush_if_exists(aTHX_ subdir);
4964 /* .../version if -d .../version */
4965 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
4967 (int)PERL_REVISION, (int)PERL_VERSION,
4968 (int)PERL_SUBVERSION);
4969 subdir = S_incpush_if_exists(aTHX_ subdir);
4971 /* .../archname if -d .../archname */
4972 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4973 SVfARG(libdir), ARCHNAME);
4974 subdir = S_incpush_if_exists(aTHX_ subdir);
4978 #ifdef PERL_INC_VERSION_LIST
4980 for (incver = incverlist; *incver; incver++) {
4981 /* .../xxx if -d .../xxx */
4982 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
4983 SVfARG(libdir), *incver);
4984 subdir = S_incpush_if_exists(aTHX_ subdir);
4990 /* finally push this lib directory on the end of @INC */
4991 av_push(GvAVn(PL_incgv), libdir);
4994 assert (SvREFCNT(subdir) == 1);
4995 SvREFCNT_dec(subdir);
5001 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5005 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5011 while (av_len(paramList) >= 0) {
5012 cv = (CV*)av_shift(paramList);
5014 if (paramList == PL_beginav) {
5015 /* save PL_beginav for compiler */
5016 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5018 else if (paramList == PL_checkav) {
5019 /* save PL_checkav for compiler */
5020 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5022 else if (paramList == PL_unitcheckav) {
5023 /* save PL_unitcheckav for compiler */
5024 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5035 PL_madskills |= 16384;
5040 PL_madskills &= ~16384;
5043 (void)SvPV_const(atsv, len);
5045 PL_curcop = &PL_compiling;
5046 CopLINE_set(PL_curcop, oldline);
5047 if (paramList == PL_beginav)
5048 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5050 Perl_sv_catpvf(aTHX_ atsv,
5051 "%s failed--call queue aborted",
5052 paramList == PL_checkav ? "CHECK"
5053 : paramList == PL_initav ? "INIT"
5054 : paramList == PL_unitcheckav ? "UNITCHECK"
5056 while (PL_scopestack_ix > oldscope)
5059 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5066 /* my_exit() was called */
5067 while (PL_scopestack_ix > oldscope)
5070 PL_curstash = PL_defstash;
5071 PL_curcop = &PL_compiling;
5072 CopLINE_set(PL_curcop, oldline);
5074 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5075 if (paramList == PL_beginav)
5076 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5078 Perl_croak(aTHX_ "%s failed--call queue aborted",
5079 paramList == PL_checkav ? "CHECK"
5080 : paramList == PL_initav ? "INIT"
5081 : paramList == PL_unitcheckav ? "UNITCHECK"
5088 PL_curcop = &PL_compiling;
5089 CopLINE_set(PL_curcop, oldline);
5092 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5101 Perl_my_exit(pTHX_ U32 status)
5104 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5105 (void*)thr, (unsigned long) status));
5114 STATUS_EXIT_SET(status);
5121 Perl_my_failure_exit(pTHX)
5125 /* We have been called to fall on our sword. The desired exit code
5126 * should be already set in STATUS_UNIX, but could be shifted over
5127 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5130 * If an error code has not been set, then force the issue.
5132 if (MY_POSIX_EXIT) {
5134 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5135 * the exit code when there isn't an error.
5138 if (STATUS_UNIX == 0)
5139 STATUS_UNIX_EXIT_SET(255);
5141 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5143 /* The exit code could have been set by $? or vmsish which
5144 * means that it may not be fatal. So convert
5145 * success/warning codes to fatal.
5147 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5148 STATUS_UNIX_EXIT_SET(255);
5152 /* Traditionally Perl on VMS always expects a Fatal Error. */
5153 if (vaxc$errno & 1) {
5155 /* So force success status to failure */
5156 if (STATUS_NATIVE & 1)
5161 STATUS_UNIX = EINTR; /* In case something cares */
5166 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5168 /* Encode the severity code */
5169 severity = STATUS_NATIVE & STS$M_SEVERITY;
5170 STATUS_UNIX = (severity ? severity : 1) << 8;
5172 /* Perl expects this to be a fatal error */
5173 if (severity != STS$K_SEVERE)
5182 STATUS_UNIX_SET(errno);
5184 exitstatus = STATUS_UNIX >> 8;
5185 if (exitstatus & 255)
5186 STATUS_UNIX_SET(exitstatus);
5188 STATUS_UNIX_SET(255);
5195 S_my_exit_jump(pTHX)
5200 SvREFCNT_dec(PL_e_script);
5204 POPSTACK_TO(PL_mainstack);
5212 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5215 const char * const p = SvPVX_const(PL_e_script);
5216 const char *nl = strchr(p, '\n');
5218 PERL_UNUSED_ARG(idx);
5219 PERL_UNUSED_ARG(maxlen);
5221 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5223 filter_del(read_e_script);
5226 sv_catpvn(buf_sv, p, nl-p);
5227 sv_chop(PL_e_script, nl);
5233 * c-indentation-style: bsd
5235 * indent-tabs-mode: t
5238 * ex: set ts=8 sts=4 sw=4 noet: