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)
198 PERL_ARGS_ASSERT_SYS_INIT;
200 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
201 PERL_UNUSED_ARG(argv);
202 PERL_SYS_INIT_BODY(argc, argv);
206 Perl_sys_init3(int* argc, char*** argv, char*** env)
210 PERL_ARGS_ASSERT_SYS_INIT3;
212 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
213 PERL_UNUSED_ARG(argv);
214 PERL_UNUSED_ARG(env);
215 PERL_SYS_INIT3_BODY(argc, argv, env);
222 if (!PL_veto_cleanup) {
223 PERL_SYS_TERM_BODY();
228 #ifdef PERL_IMPLICIT_SYS
230 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
231 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
232 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
233 struct IPerlDir* ipD, struct IPerlSock* ipS,
234 struct IPerlProc* ipP)
236 PerlInterpreter *my_perl;
238 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
240 /* Newx() needs interpreter, so call malloc() instead */
241 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
242 S_init_tls_and_interp(my_perl);
243 Zero(my_perl, 1, PerlInterpreter);
253 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
260 =head1 Embedding Functions
262 =for apidoc perl_alloc
264 Allocates a new Perl interpreter. See L<perlembed>.
272 PerlInterpreter *my_perl;
274 /* Newx() needs interpreter, so call malloc() instead */
275 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
277 S_init_tls_and_interp(my_perl);
278 #ifndef PERL_TRACK_MEMPOOL
279 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
281 Zero(my_perl, 1, PerlInterpreter);
282 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
286 #endif /* PERL_IMPLICIT_SYS */
289 =for apidoc perl_construct
291 Initializes a new Perl interpreter. See L<perlembed>.
297 perl_construct(pTHXx)
301 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
305 PL_perl_destruct_level = 1;
307 PERL_UNUSED_ARG(my_perl);
308 if (PL_perl_destruct_level > 0)
311 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
313 /* set read-only and try to insure than we wont see REFCNT==0
316 SvREADONLY_on(&PL_sv_undef);
317 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
319 sv_setpv(&PL_sv_no,PL_No);
320 /* value lookup in void context - happens to have the side effect
321 of caching the numeric forms. However, as &PL_sv_no doesn't contain
322 a string that is a valid numer, we have to turn the public flags by
328 SvREADONLY_on(&PL_sv_no);
329 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
331 sv_setpv(&PL_sv_yes,PL_Yes);
334 SvREADONLY_on(&PL_sv_yes);
335 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
337 SvREADONLY_on(&PL_sv_placeholder);
338 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
340 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
341 #ifdef PERL_USES_PL_PIDSTATUS
342 PL_pidstatus = newHV();
345 PL_rs = newSVpvs("\n");
355 SET_NUMERIC_STANDARD();
357 #if defined(LOCAL_PATCH_COUNT)
358 PL_localpatches = local_patches; /* For possible -v */
361 #ifdef HAVE_INTERP_INTERN
365 PerlIO_init(aTHX); /* Hook to IO system */
367 PL_fdpid = newAV(); /* for remembering popen pids by fd */
368 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
369 PL_errors = newSVpvs("");
370 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
371 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
372 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
374 /* First entry is a list of empty elements. It needs to be initialised
375 else all hell breaks loose in S_find_uninit_var(). */
376 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
377 PL_regex_pad = AvARRAY(PL_regex_padav);
379 #ifdef USE_REENTRANT_API
380 Perl_reentrant_init(aTHX);
383 /* Note that strtab is a rather special HV. Assumptions are made
384 about not iterating on it, and not adding tie magic to it.
385 It is properly deallocated in perl_destruct() */
388 HvSHAREKEYS_off(PL_strtab); /* mandatory */
389 hv_ksplit(PL_strtab, 512);
391 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
392 _dyld_lookup_and_bind
393 ("__environ", (unsigned long *) &environ_pointer, NULL);
397 # ifdef USE_ENVIRON_ARRAY
398 PL_origenviron = environ;
402 /* Use sysconf(_SC_CLK_TCK) if available, if not
403 * available or if the sysconf() fails, use the HZ.
404 * BeOS has those, but returns the wrong value.
405 * The HZ if not originally defined has been by now
406 * been defined as CLK_TCK, if available. */
407 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
408 PL_clocktick = sysconf(_SC_CLK_TCK);
409 if (PL_clocktick <= 0)
413 PL_stashcache = newHV();
415 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
416 (int)PERL_VERSION, (int)PERL_SUBVERSION);
419 if (!PL_mmap_page_size) {
420 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
422 SETERRNO(0, SS_NORMAL);
424 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
426 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
428 if ((long) PL_mmap_page_size < 0) {
430 SV * const error = ERRSV;
431 SvUPGRADE(error, SVt_PV);
432 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
435 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
439 # ifdef HAS_GETPAGESIZE
440 PL_mmap_page_size = getpagesize();
442 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
443 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
447 if (PL_mmap_page_size <= 0)
448 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
449 (IV) PL_mmap_page_size);
451 #endif /* HAS_MMAP */
453 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
454 PL_timesbase.tms_utime = 0;
455 PL_timesbase.tms_stime = 0;
456 PL_timesbase.tms_cutime = 0;
457 PL_timesbase.tms_cstime = 0;
464 =for apidoc nothreadhook
466 Stub that provides thread hook for perl_destruct when there are
473 Perl_nothreadhook(pTHX)
479 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
481 Perl_dump_sv_child(pTHX_ SV *sv)
484 const int sock = PL_dumper_fd;
485 const int debug_fd = PerlIO_fileno(Perl_debug_log);
486 union control_un control;
489 struct cmsghdr *cmptr;
491 unsigned char buffer[256];
493 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
495 if(sock == -1 || debug_fd == -1)
498 PerlIO_flush(Perl_debug_log);
500 /* All these shenanigans are to pass a file descriptor over to our child for
501 it to dump out to. We can't let it hold open the file descriptor when it
502 forks, as the file descriptor it will dump to can turn out to be one end
503 of pipe that some other process will wait on for EOF. (So as it would
504 be open, the wait would be forever.) */
506 msg.msg_control = control.control;
507 msg.msg_controllen = sizeof(control.control);
508 /* We're a connected socket so we don't need a destination */
514 cmptr = CMSG_FIRSTHDR(&msg);
515 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
516 cmptr->cmsg_level = SOL_SOCKET;
517 cmptr->cmsg_type = SCM_RIGHTS;
518 *((int *)CMSG_DATA(cmptr)) = 1;
520 vec[0].iov_base = (void*)&sv;
521 vec[0].iov_len = sizeof(sv);
522 got = sendmsg(sock, &msg, 0);
525 perror("Debug leaking scalars parent sendmsg failed");
528 if(got < sizeof(sv)) {
529 perror("Debug leaking scalars parent short sendmsg");
533 /* Return protocol is
535 unsigned char: length of location string (0 for empty)
536 unsigned char*: string (not terminated)
538 vec[0].iov_base = (void*)&returned_errno;
539 vec[0].iov_len = sizeof(returned_errno);
540 vec[1].iov_base = buffer;
543 got = readv(sock, vec, 2);
546 perror("Debug leaking scalars parent read failed");
547 PerlIO_flush(PerlIO_stderr());
550 if(got < sizeof(returned_errno) + 1) {
551 perror("Debug leaking scalars parent short read");
552 PerlIO_flush(PerlIO_stderr());
557 got = read(sock, buffer + 1, *buffer);
559 perror("Debug leaking scalars parent read 2 failed");
560 PerlIO_flush(PerlIO_stderr());
565 perror("Debug leaking scalars parent short read 2");
566 PerlIO_flush(PerlIO_stderr());
571 if (returned_errno || *buffer) {
572 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
573 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
574 returned_errno, strerror(returned_errno));
580 =for apidoc perl_destruct
582 Shuts down a Perl interpreter. See L<perlembed>.
591 VOL signed char destruct_level; /* see possible values in intrpvar.h */
593 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
597 PERL_ARGS_ASSERT_PERL_DESTRUCT;
599 PERL_UNUSED_ARG(my_perl);
602 /* wait for all pseudo-forked children to finish */
603 PERL_WAIT_FOR_CHILDREN;
605 destruct_level = PL_perl_destruct_level;
608 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
610 const int i = atoi(s);
611 if (destruct_level < i)
617 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
623 if (PL_endav && !PL_minus_c)
624 call_list(PL_scopestack_ix, PL_endav);
630 /* Need to flush since END blocks can produce output */
633 if (CALL_FPTR(PL_threadhook)(aTHX)) {
634 /* Threads hook has vetoed further cleanup */
635 PL_veto_cleanup = TRUE;
639 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
640 if (destruct_level != 0) {
641 /* Fork here to create a child. Our child's job is to preserve the
642 state of scalars prior to destruction, so that we can instruct it
643 to dump any scalars that we later find have leaked.
644 There's no subtlety in this code - it assumes POSIX, and it doesn't
648 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
649 perror("Debug leaking scalars socketpair failed");
655 perror("Debug leaking scalars fork failed");
659 /* We are the child */
660 const int sock = fd[1];
661 const int debug_fd = PerlIO_fileno(Perl_debug_log);
664 /* Our success message is an integer 0, and a char 0 */
665 static const char success[sizeof(int) + 1];
669 /* We need to close all other file descriptors otherwise we end up
670 with interesting hangs, where the parent closes its end of a
671 pipe, and sits waiting for (another) child to terminate. Only
672 that child never terminates, because it never gets EOF, because
673 we also have the far end of the pipe open. We even need to
674 close the debugging fd, because sometimes it happens to be one
675 end of a pipe, and a process is waiting on the other end for
676 EOF. Normally it would be closed at some point earlier in
677 destruction, but if we happen to cause the pipe to remain open,
678 EOF never occurs, and we get an infinite hang. Hence all the
679 games to pass in a file descriptor if it's actually needed. */
681 f = sysconf(_SC_OPEN_MAX);
683 where = "sysconf failed";
694 union control_un control;
697 struct cmsghdr *cmptr;
701 msg.msg_control = control.control;
702 msg.msg_controllen = sizeof(control.control);
703 /* We're a connected socket so we don't need a source */
707 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
709 vec[0].iov_base = (void*)⌖
710 vec[0].iov_len = sizeof(target);
712 got = recvmsg(sock, &msg, 0);
717 where = "recv failed";
720 if(got < sizeof(target)) {
721 where = "short recv";
725 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
729 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
730 where = "wrong cmsg_len";
733 if(cmptr->cmsg_level != SOL_SOCKET) {
734 where = "wrong cmsg_level";
737 if(cmptr->cmsg_type != SCM_RIGHTS) {
738 where = "wrong cmsg_type";
742 got_fd = *(int*)CMSG_DATA(cmptr);
743 /* For our last little bit of trickery, put the file descriptor
744 back into Perl_debug_log, as if we never actually closed it
746 if(got_fd != debug_fd) {
747 if (dup2(got_fd, debug_fd) == -1) {
754 PerlIO_flush(Perl_debug_log);
756 got = write(sock, &success, sizeof(success));
759 where = "write failed";
762 if(got < sizeof(success)) {
763 where = "short write";
770 int send_errno = errno;
771 unsigned char length = (unsigned char) strlen(where);
772 struct iovec failure[3] = {
773 {(void*)&send_errno, sizeof(send_errno)},
775 {(void*)where, length}
777 int got = writev(sock, failure, 3);
778 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
779 in the parent if we try to read from the socketpair after the
780 child has exited, even if there was data to read.
781 So sleep a bit to give the parent a fighting chance of
784 _exit((got == -1) ? errno : 0);
788 PL_dumper_fd = fd[0];
793 /* We must account for everything. */
795 /* Destroy the main CV and syntax tree */
796 /* Do this now, because destroying ops can cause new SVs to be generated
797 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
798 PL_curcop to point to a valid op from which the filename structure
800 PL_curcop = &PL_compiling;
802 /* ensure comppad/curpad to refer to main's pad */
803 if (CvPADLIST(PL_main_cv)) {
804 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
806 op_free(PL_main_root);
809 PL_main_start = NULL;
810 SvREFCNT_dec(PL_main_cv);
814 /* Tell PerlIO we are about to tear things apart in case
815 we have layers which are using resources that should
819 PerlIO_destruct(aTHX);
821 if (PL_sv_objcount) {
823 * Try to destruct global references. We do this first so that the
824 * destructors and destructees still exist. Some sv's might remain.
825 * Non-referenced objects are on their own.
829 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
830 PL_defoutgv = NULL; /* may have been freed */
833 /* unhook hooks which will soon be, or use, destroyed data */
834 SvREFCNT_dec(PL_warnhook);
836 SvREFCNT_dec(PL_diehook);
839 /* call exit list functions */
840 while (PL_exitlistlen-- > 0)
841 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
843 Safefree(PL_exitlist);
848 /* jettison our possibly duplicated environment */
849 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
850 * so we certainly shouldn't free it here
853 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
854 if (environ != PL_origenviron && !PL_use_safe_putenv
856 /* only main thread can free environ[0] contents */
857 && PL_curinterp == aTHX
863 for (i = 0; environ[i]; i++)
864 safesysfree(environ[i]);
866 /* Must use safesysfree() when working with environ. */
867 safesysfree(environ);
869 environ = PL_origenviron;
872 #endif /* !PERL_MICRO */
874 if (destruct_level == 0) {
876 DEBUG_P(debprofdump());
878 #if defined(PERLIO_LAYERS)
879 /* No more IO - including error messages ! */
880 PerlIO_cleanup(aTHX);
883 CopFILE_free(&PL_compiling);
884 CopSTASH_free(&PL_compiling);
886 /* The exit() function will do everything that needs doing. */
890 /* reset so print() ends up where we expect */
894 /* the syntax tree is shared between clones
895 * so op_free(PL_main_root) only ReREFCNT_dec's
896 * REGEXPs in the parent interpreter
897 * we need to manually ReREFCNT_dec for the clones
899 SvREFCNT_dec(PL_regex_padav);
900 PL_regex_padav = NULL;
904 SvREFCNT_dec((SV*) PL_stashcache);
905 PL_stashcache = NULL;
907 /* loosen bonds of global variables */
909 /* XXX can PL_parser still be non-null here? */
910 if(PL_parser && PL_parser->rsfp) {
911 (void)PerlIO_close(PL_parser->rsfp);
912 PL_parser->rsfp = NULL;
916 Safefree(PL_splitstr);
926 PL_doswitches = FALSE;
927 PL_dowarn = G_WARN_OFF;
928 PL_doextract = FALSE;
929 PL_sawampersand = FALSE; /* must save all match strings */
932 Safefree(PL_inplace);
934 SvREFCNT_dec(PL_patchlevel);
937 SvREFCNT_dec(PL_e_script);
943 /* magical thingies */
945 SvREFCNT_dec(PL_ofs_sv); /* $, */
948 SvREFCNT_dec(PL_ors_sv); /* $\ */
951 SvREFCNT_dec(PL_rs); /* $/ */
954 Safefree(PL_osname); /* $^O */
957 SvREFCNT_dec(PL_statname);
961 /* defgv, aka *_ should be taken care of elsewhere */
963 /* clean up after study() */
964 SvREFCNT_dec(PL_lastscream);
965 PL_lastscream = NULL;
966 Safefree(PL_screamfirst);
968 Safefree(PL_screamnext);
972 Safefree(PL_efloatbuf);
976 /* startup and shutdown function lists */
977 SvREFCNT_dec(PL_beginav);
978 SvREFCNT_dec(PL_beginav_save);
979 SvREFCNT_dec(PL_endav);
980 SvREFCNT_dec(PL_checkav);
981 SvREFCNT_dec(PL_checkav_save);
982 SvREFCNT_dec(PL_unitcheckav);
983 SvREFCNT_dec(PL_unitcheckav_save);
984 SvREFCNT_dec(PL_initav);
986 PL_beginav_save = NULL;
989 PL_checkav_save = NULL;
990 PL_unitcheckav = NULL;
991 PL_unitcheckav_save = NULL;
994 /* shortcuts just get cleared */
1000 PL_argvoutgv = NULL;
1003 PL_last_in_gv = NULL;
1015 SvREFCNT_dec(PL_argvout_stack);
1016 PL_argvout_stack = NULL;
1018 SvREFCNT_dec(PL_modglobal);
1019 PL_modglobal = NULL;
1020 SvREFCNT_dec(PL_preambleav);
1021 PL_preambleav = NULL;
1022 SvREFCNT_dec(PL_subname);
1024 #ifdef PERL_USES_PL_PIDSTATUS
1025 SvREFCNT_dec(PL_pidstatus);
1026 PL_pidstatus = NULL;
1028 SvREFCNT_dec(PL_toptarget);
1029 PL_toptarget = NULL;
1030 SvREFCNT_dec(PL_bodytarget);
1031 PL_bodytarget = NULL;
1032 PL_formtarget = NULL;
1034 /* free locale stuff */
1035 #ifdef USE_LOCALE_COLLATE
1036 Safefree(PL_collation_name);
1037 PL_collation_name = NULL;
1040 #ifdef USE_LOCALE_NUMERIC
1041 Safefree(PL_numeric_name);
1042 PL_numeric_name = NULL;
1043 SvREFCNT_dec(PL_numeric_radix_sv);
1044 PL_numeric_radix_sv = NULL;
1047 /* clear utf8 character classes */
1048 SvREFCNT_dec(PL_utf8_alnum);
1049 SvREFCNT_dec(PL_utf8_alnumc);
1050 SvREFCNT_dec(PL_utf8_ascii);
1051 SvREFCNT_dec(PL_utf8_alpha);
1052 SvREFCNT_dec(PL_utf8_space);
1053 SvREFCNT_dec(PL_utf8_cntrl);
1054 SvREFCNT_dec(PL_utf8_graph);
1055 SvREFCNT_dec(PL_utf8_digit);
1056 SvREFCNT_dec(PL_utf8_upper);
1057 SvREFCNT_dec(PL_utf8_lower);
1058 SvREFCNT_dec(PL_utf8_print);
1059 SvREFCNT_dec(PL_utf8_punct);
1060 SvREFCNT_dec(PL_utf8_xdigit);
1061 SvREFCNT_dec(PL_utf8_mark);
1062 SvREFCNT_dec(PL_utf8_toupper);
1063 SvREFCNT_dec(PL_utf8_totitle);
1064 SvREFCNT_dec(PL_utf8_tolower);
1065 SvREFCNT_dec(PL_utf8_tofold);
1066 SvREFCNT_dec(PL_utf8_idstart);
1067 SvREFCNT_dec(PL_utf8_idcont);
1068 PL_utf8_alnum = NULL;
1069 PL_utf8_alnumc = NULL;
1070 PL_utf8_ascii = NULL;
1071 PL_utf8_alpha = NULL;
1072 PL_utf8_space = NULL;
1073 PL_utf8_cntrl = NULL;
1074 PL_utf8_graph = NULL;
1075 PL_utf8_digit = NULL;
1076 PL_utf8_upper = NULL;
1077 PL_utf8_lower = NULL;
1078 PL_utf8_print = NULL;
1079 PL_utf8_punct = NULL;
1080 PL_utf8_xdigit = NULL;
1081 PL_utf8_mark = NULL;
1082 PL_utf8_toupper = NULL;
1083 PL_utf8_totitle = NULL;
1084 PL_utf8_tolower = NULL;
1085 PL_utf8_tofold = NULL;
1086 PL_utf8_idstart = NULL;
1087 PL_utf8_idcont = NULL;
1089 if (!specialWARN(PL_compiling.cop_warnings))
1090 PerlMemShared_free(PL_compiling.cop_warnings);
1091 PL_compiling.cop_warnings = NULL;
1092 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1093 PL_compiling.cop_hints_hash = NULL;
1094 CopFILE_free(&PL_compiling);
1095 CopSTASH_free(&PL_compiling);
1097 /* Prepare to destruct main symbol table. */
1102 SvREFCNT_dec(PL_curstname);
1103 PL_curstname = NULL;
1105 /* clear queued errors */
1106 SvREFCNT_dec(PL_errors);
1109 SvREFCNT_dec(PL_isarev);
1112 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1113 if (PL_scopestack_ix != 0)
1114 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1115 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1116 (long)PL_scopestack_ix);
1117 if (PL_savestack_ix != 0)
1118 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1119 "Unbalanced saves: %ld more saves than restores\n",
1120 (long)PL_savestack_ix);
1121 if (PL_tmps_floor != -1)
1122 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1123 (long)PL_tmps_floor + 1);
1124 if (cxstack_ix != -1)
1125 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1126 (long)cxstack_ix + 1);
1129 /* Now absolutely destruct everything, somehow or other, loops or no. */
1131 /* the 2 is for PL_fdpid and PL_strtab */
1132 while (sv_clean_all() > 2)
1135 AvREAL_off(PL_fdpid); /* no surviving entries */
1136 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1139 #ifdef HAVE_INTERP_INTERN
1143 /* Destruct the global string table. */
1145 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1146 * so that sv_free() won't fail on them.
1147 * Now that the global string table is using a single hunk of memory
1148 * for both HE and HEK, we either need to explicitly unshare it the
1149 * correct way, or actually free things here.
1152 const I32 max = HvMAX(PL_strtab);
1153 HE * const * const array = HvARRAY(PL_strtab);
1154 HE *hent = array[0];
1157 if (hent && ckWARN_d(WARN_INTERNAL)) {
1158 HE * const next = HeNEXT(hent);
1159 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1160 "Unbalanced string table refcount: (%ld) for \"%s\"",
1161 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1168 hent = array[riter];
1173 HvARRAY(PL_strtab) = 0;
1174 HvTOTALKEYS(PL_strtab) = 0;
1175 HvFILL(PL_strtab) = 0;
1177 SvREFCNT_dec(PL_strtab);
1180 /* free the pointer tables used for cloning */
1181 ptr_table_free(PL_ptr_table);
1182 PL_ptr_table = (PTR_TBL_t*)NULL;
1185 /* free special SVs */
1187 SvREFCNT(&PL_sv_yes) = 0;
1188 sv_clear(&PL_sv_yes);
1189 SvANY(&PL_sv_yes) = NULL;
1190 SvFLAGS(&PL_sv_yes) = 0;
1192 SvREFCNT(&PL_sv_no) = 0;
1193 sv_clear(&PL_sv_no);
1194 SvANY(&PL_sv_no) = NULL;
1195 SvFLAGS(&PL_sv_no) = 0;
1199 for (i=0; i<=2; i++) {
1200 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1201 sv_clear(PERL_DEBUG_PAD(i));
1202 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1203 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1207 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1208 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1210 #ifdef DEBUG_LEAKING_SCALARS
1211 if (PL_sv_count != 0) {
1216 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1217 svend = &sva[SvREFCNT(sva)];
1218 for (sv = sva + 1; sv < svend; ++sv) {
1219 if (SvTYPE(sv) != SVTYPEMASK) {
1220 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1222 " refcnt=%"UVuf pTHX__FORMAT "\n"
1223 "\tallocated at %s:%d %s %s%s\n",
1224 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1226 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1228 sv->sv_debug_inpad ? "for" : "by",
1229 sv->sv_debug_optype ?
1230 PL_op_name[sv->sv_debug_optype]: "(none)",
1231 sv->sv_debug_cloned ? " (cloned)" : ""
1233 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1234 Perl_dump_sv_child(aTHX_ sv);
1240 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1244 /* Wait for up to 4 seconds for child to terminate.
1245 This seems to be the least effort way of timing out on reaping
1247 struct timeval waitfor = {4, 0};
1248 int sock = PL_dumper_fd;
1252 FD_SET(sock, &rset);
1253 select(sock + 1, &rset, NULL, NULL, &waitfor);
1254 waitpid(child, &status, WNOHANG);
1259 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1265 #ifdef PERL_DEBUG_READONLY_OPS
1271 #if defined(PERLIO_LAYERS)
1272 /* No more IO - including error messages ! */
1273 PerlIO_cleanup(aTHX);
1276 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1277 as currently layers use it rather than NULL as a marker
1278 for no arg - and will try and SvREFCNT_dec it.
1280 SvREFCNT(&PL_sv_undef) = 0;
1281 SvREADONLY_off(&PL_sv_undef);
1283 Safefree(PL_origfilename);
1284 PL_origfilename = NULL;
1285 Safefree(PL_reg_start_tmp);
1286 PL_reg_start_tmp = (char**)NULL;
1287 PL_reg_start_tmpl = 0;
1288 Safefree(PL_reg_curpm);
1289 Safefree(PL_reg_poscache);
1290 free_tied_hv_pool();
1291 Safefree(PL_op_mask);
1292 Safefree(PL_psig_ptr);
1293 PL_psig_ptr = (SV**)NULL;
1294 Safefree(PL_psig_name);
1295 PL_psig_name = (SV**)NULL;
1296 Safefree(PL_bitcount);
1298 Safefree(PL_psig_pend);
1299 PL_psig_pend = (int*)NULL;
1302 PL_tainting = FALSE;
1303 PL_taint_warn = FALSE;
1304 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1307 DEBUG_P(debprofdump());
1309 #ifdef USE_REENTRANT_API
1310 Perl_reentrant_free(aTHX);
1315 while (PL_regmatch_slab) {
1316 regmatch_slab *s = PL_regmatch_slab;
1317 PL_regmatch_slab = PL_regmatch_slab->next;
1321 /* As the absolutely last thing, free the non-arena SV for mess() */
1324 /* we know that type == SVt_PVMG */
1326 /* it could have accumulated taint magic */
1329 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1330 moremagic = mg->mg_moremagic;
1331 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1333 Safefree(mg->mg_ptr);
1337 /* we know that type >= SVt_PV */
1338 SvPV_free(PL_mess_sv);
1339 Safefree(SvANY(PL_mess_sv));
1340 Safefree(PL_mess_sv);
1347 =for apidoc perl_free
1349 Releases a Perl interpreter. See L<perlembed>.
1359 PERL_ARGS_ASSERT_PERL_FREE;
1361 if (PL_veto_cleanup)
1364 #ifdef PERL_TRACK_MEMPOOL
1367 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1368 * value as we're probably hunting memory leaks then
1370 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1371 if (!s || atoi(s) == 0) {
1372 const U32 old_debug = PL_debug;
1373 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1374 thread at thread exit. */
1376 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1377 "free this thread's memory\n");
1378 PL_debug &= ~ DEBUG_m_FLAG;
1380 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1381 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1382 PL_debug = old_debug;
1387 #if defined(WIN32) || defined(NETWARE)
1388 # if defined(PERL_IMPLICIT_SYS)
1391 void *host = nw_internal_host;
1393 void *host = w32_internal_host;
1395 PerlMem_free(aTHXx);
1397 nw_delete_internal_host(host);
1399 win32_delete_internal_host(host);
1403 PerlMem_free(aTHXx);
1406 PerlMem_free(aTHXx);
1410 #if defined(USE_ITHREADS)
1411 /* provide destructors to clean up the thread key when libperl is unloaded */
1412 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1414 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1415 #pragma fini "perl_fini"
1416 #elif defined(__sun) && !defined(__GNUC__)
1417 #pragma fini (perl_fini)
1421 #if defined(__GNUC__)
1422 __attribute__((destructor))
1427 if (PL_curinterp && !PL_veto_cleanup)
1432 #endif /* THREADS */
1435 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1438 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1439 PL_exitlist[PL_exitlistlen].fn = fn;
1440 PL_exitlist[PL_exitlistlen].ptr = ptr;
1444 #ifdef HAS_PROCSELFEXE
1445 /* This is a function so that we don't hold on to MAXPATHLEN
1446 bytes of stack longer than necessary
1449 S_procself_val(pTHX_ SV *sv, const char *arg0)
1451 char buf[MAXPATHLEN];
1452 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1454 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1455 includes a spurious NUL which will cause $^X to fail in system
1456 or backticks (this will prevent extensions from being built and
1457 many tests from working). readlink is not meant to add a NUL.
1458 Normal readlink works fine.
1460 if (len > 0 && buf[len-1] == '\0') {
1464 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1465 returning the text "unknown" from the readlink rather than the path
1466 to the executable (or returning an error from the readlink). Any valid
1467 path has a '/' in it somewhere, so use that to validate the result.
1468 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1470 if (len > 0 && memchr(buf, '/', len)) {
1471 sv_setpvn(sv,buf,len);
1477 #endif /* HAS_PROCSELFEXE */
1480 S_set_caret_X(pTHX) {
1482 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1484 #ifdef HAS_PROCSELFEXE
1485 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1488 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1490 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1497 =for apidoc perl_parse
1499 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1505 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1512 PERL_ARGS_ASSERT_PERL_PARSE;
1513 #ifndef MULTIPLICITY
1514 PERL_UNUSED_ARG(my_perl);
1517 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW_AND_IAMSUID
1518 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now "
1519 "execute\nsetuid perl scripts securely.\n");
1522 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1523 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1524 * This MUST be done before any hash stores or fetches take place.
1525 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1526 * yourself, it is your responsibility to provide a good random seed!
1527 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1528 if (!PL_rehash_seed_set)
1529 PL_rehash_seed = get_hash_seed();
1531 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1533 if (s && (atoi(s) == 1))
1534 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1536 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1541 if (PL_origalen != 0) {
1542 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1545 /* Set PL_origalen be the sum of the contiguous argv[]
1546 * elements plus the size of the env in case that it is
1547 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1548 * as the maximum modifiable length of $0. In the worst case
1549 * the area we are able to modify is limited to the size of
1550 * the original argv[0]. (See below for 'contiguous', though.)
1552 const char *s = NULL;
1555 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1556 /* Do the mask check only if the args seem like aligned. */
1558 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1560 /* See if all the arguments are contiguous in memory. Note
1561 * that 'contiguous' is a loose term because some platforms
1562 * align the argv[] and the envp[]. If the arguments look
1563 * like non-aligned, assume that they are 'strictly' or
1564 * 'traditionally' contiguous. If the arguments look like
1565 * aligned, we just check that they are within aligned
1566 * PTRSIZE bytes. As long as no system has something bizarre
1567 * like the argv[] interleaved with some other data, we are
1568 * fine. (Did I just evoke Murphy's Law?) --jhi */
1569 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1571 for (i = 1; i < PL_origargc; i++) {
1572 if ((PL_origargv[i] == s + 1
1574 || PL_origargv[i] == s + 2
1579 (PL_origargv[i] > s &&
1581 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1592 #ifndef PERL_USE_SAFE_PUTENV
1593 /* Can we grab env area too to be used as the area for $0? */
1594 if (s && PL_origenviron && !PL_use_safe_putenv) {
1595 if ((PL_origenviron[0] == s + 1)
1598 (PL_origenviron[0] > s &&
1599 PL_origenviron[0] <=
1600 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1603 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1604 s = PL_origenviron[0];
1607 my_setenv("NoNe SuCh", NULL);
1608 /* Force copy of environment. */
1609 for (i = 1; PL_origenviron[i]; i++) {
1610 if (PL_origenviron[i] == s + 1
1613 (PL_origenviron[i] > s &&
1614 PL_origenviron[i] <=
1615 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1618 s = PL_origenviron[i];
1626 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1628 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1633 /* Come here if running an undumped a.out. */
1635 PL_origfilename = savepv(argv[0]);
1636 PL_do_undump = FALSE;
1637 cxstack_ix = -1; /* start label stack again */
1639 assert (!PL_tainted);
1641 S_set_caret_X(aTHX);
1643 init_postdump_symbols(argc,argv,env);
1648 op_free(PL_main_root);
1649 PL_main_root = NULL;
1651 PL_main_start = NULL;
1652 SvREFCNT_dec(PL_main_cv);
1656 oldscope = PL_scopestack_ix;
1657 PL_dowarn = G_WARN_OFF;
1662 parse_body(env,xsinit);
1664 call_list(oldscope, PL_unitcheckav);
1666 call_list(oldscope, PL_checkav);
1673 /* my_exit() was called */
1674 while (PL_scopestack_ix > oldscope)
1677 PL_curstash = PL_defstash;
1679 call_list(oldscope, PL_unitcheckav);
1681 call_list(oldscope, PL_checkav);
1685 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1694 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1698 int argc = PL_origargc;
1699 char **argv = PL_origargv;
1700 const char *scriptname = NULL;
1701 VOL bool dosearch = FALSE;
1703 const char *validarg = "";
1707 const char *cddir = NULL;
1708 #ifdef USE_SITECUSTOMIZE
1709 bool minus_f = FALSE;
1711 SV *linestr_sv = newSV_type(SVt_PVIV);
1712 bool add_read_e_script = FALSE;
1714 SvGROW(linestr_sv, 80);
1715 sv_setpvn(linestr_sv,"",0);
1717 sv = newSVpvs(""); /* first used for -I flags */
1723 for (argc--,argv++; argc > 0; argc--,argv++) {
1724 if (argv[0][0] != '-' || !argv[0][1])
1728 validarg = " PHOOEY ";
1732 * Can we rely on the kernel to start scripts with argv[1] set to
1733 * contain all #! line switches (the whole line)? (argv[0] is set to
1734 * the interpreter name, argv[2] to the script name; argv[3] and
1735 * above may contain other arguments.)
1742 #ifndef PERL_STRICT_CR
1766 if ((s = moreswitches(s)))
1771 CHECK_MALLOC_TOO_LATE_FOR('t');
1772 if( !PL_tainting ) {
1773 PL_taint_warn = TRUE;
1779 CHECK_MALLOC_TOO_LATE_FOR('T');
1781 PL_taint_warn = FALSE;
1789 #ifdef MACOS_TRADITIONAL
1790 /* ignore -e for Dev:Pseudo argument */
1791 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1794 forbid_setid('e', FALSE);
1796 PL_e_script = newSVpvs("");
1797 add_read_e_script = TRUE;
1800 sv_catpv(PL_e_script, s);
1802 sv_catpv(PL_e_script, argv[1]);
1806 Perl_croak(aTHX_ "No code specified for -%c", c);
1807 sv_catpvs(PL_e_script, "\n");
1811 #ifdef USE_SITECUSTOMIZE
1817 case 'I': /* -I handled both here and in moreswitches() */
1818 forbid_setid('I', FALSE);
1819 if (!*++s && (s=argv[1]) != NULL) {
1823 STRLEN len = strlen(s);
1824 const char * const p = savepvn(s, len);
1825 incpush(p, TRUE, TRUE, FALSE, FALSE);
1826 sv_catpvs(sv, "-I");
1827 sv_catpvn(sv, p, len);
1832 Perl_croak(aTHX_ "No directory specified for -I");
1835 forbid_setid('S', FALSE);
1843 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1845 /* Can't do newSVpvs() as that would involve pre-processor
1846 condititionals inside a macro expansion. */
1847 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1854 # ifdef PERL_DONT_CREATE_GVSV
1855 " PERL_DONT_CREATE_GVSV"
1857 # ifdef PERL_MALLOC_WRAP
1860 # ifdef PERL_MEM_LOG
1863 # ifdef PERL_MEM_LOG_ENV
1866 # ifdef PERL_MEM_LOG_ENV_FD
1867 " PERL_MEM_LOG_ENV_FD"
1869 # ifdef PERL_MEM_LOG_STDERR
1870 " PERL_MEM_LOG_STDERR"
1872 # ifdef PERL_MEM_LOG_TIMESTAMP
1873 " PERL_MEM_LOG_TIMESTAMP"
1875 # ifdef PERL_USE_SAFE_PUTENV
1876 " PERL_USE_SAFE_PUTENV"
1878 # ifdef USE_SITECUSTOMIZE
1879 " USE_SITECUSTOMIZE"
1883 sv_catpv(opts_prog, PL_bincompat_options);
1884 /* Terminate the qw(, and then wrap at 76 columns. */
1885 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1887 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1889 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1892 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1894 #if defined(LOCAL_PATCH_COUNT)
1895 if (LOCAL_PATCH_COUNT > 0) {
1897 sv_catpvs(opts_prog,
1898 "\" Locally applied patches:\\n\",");
1899 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1900 if (PL_localpatches[i])
1901 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1902 0, PL_localpatches[i], 0);
1906 Perl_sv_catpvf(aTHX_ opts_prog,
1907 "\" Built under %s\\n",OSNAME);
1910 sv_catpvs(opts_prog,
1911 " Compiled at " __DATE__ " " __TIME__ "\\n\"");
1913 sv_catpvs(opts_prog, " Compiled on " __DATE__ "\\n\"");
1916 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1917 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1918 "sort grep {/^PERL/} keys %ENV; ");
1920 sv_catpvs(opts_prog,
1921 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1923 sv_catpvs(opts_prog,
1924 "print \" \\%ENV:\\n @env\\n\" if @env;"
1925 "print \" \\@INC:\\n @INC\\n\";");
1929 opts_prog = Perl_newSVpvf(aTHX_
1930 "Config::config_vars(qw%c%s%c)",
1934 av_push(PL_preambleav, opts_prog);
1935 /* don't look for script or read stdin */
1936 scriptname = BIT_BUCKET;
1940 PL_doextract = TRUE;
1948 if (!*++s || isSPACE(*s)) {
1952 /* catch use of gnu style long options */
1953 if (strEQ(s, "version")) {
1957 if (strEQ(s, "help")) {
1964 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1975 #ifndef SECURE_INTERNAL_GETENV
1978 (s = PerlEnv_getenv("PERL5OPT")))
1980 const char *popt = s;
1983 if (*s == '-' && *(s+1) == 'T') {
1984 CHECK_MALLOC_TOO_LATE_FOR('T');
1986 PL_taint_warn = FALSE;
1989 char *popt_copy = NULL;
2002 if (!strchr("CDIMUdmtw", *s))
2003 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2007 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2008 s = popt_copy + (s - popt);
2009 d = popt_copy + (d - popt);
2016 if( !PL_tainting ) {
2017 PL_taint_warn = TRUE;
2028 #ifdef USE_SITECUSTOMIZE
2030 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2031 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2036 scriptname = argv[0];
2039 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2041 else if (scriptname == NULL) {
2043 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2049 /* Set $^X early so that it can be used for relocatable paths in @INC */
2050 assert (!PL_tainted);
2052 S_set_caret_X(aTHX);
2057 bool suidscript = FALSE;
2060 const int fdscript =
2062 open_script(scriptname, dosearch, &suidscript, &rsfp);
2064 validate_suid(validarg, scriptname, fdscript, suidscript,
2068 # if defined(SIGCHLD) || defined(SIGCLD)
2071 # define SIGCHLD SIGCLD
2073 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2074 if (sigstate == (Sighandler_t) SIG_IGN) {
2075 if (ckWARN(WARN_SIGNAL))
2076 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2077 "Can't ignore signal CHLD, forcing to default");
2078 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2085 #ifdef MACOS_TRADITIONAL
2086 || gMacPerl_AlwaysExtract
2090 /* This will croak if suidscript is true, as -x cannot be used with
2092 forbid_setid('x', suidscript);
2093 /* Hence you can't get here if suidscript is true */
2095 find_beginning(linestr_sv, rsfp);
2096 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2097 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2101 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2102 CvUNIQUE_on(PL_compcv);
2104 CvPADLIST(PL_compcv) = pad_new(0);
2106 PL_isarev = newHV();
2109 boot_core_UNIVERSAL();
2110 boot_core_xsutils();
2114 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2116 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2122 # ifdef HAS_SOCKS5_INIT
2123 socks5_init(argv[0]);
2129 init_predump_symbols();
2130 /* init_postdump_symbols not currently designed to be called */
2131 /* more than once (ENV isn't cleared first, for example) */
2132 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2134 init_postdump_symbols(argc,argv,env);
2136 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2137 * or explicitly in some platforms.
2138 * locale.c:Perl_init_i18nl10n() if the environment
2139 * look like the user wants to use UTF-8. */
2140 #if defined(__SYMBIAN32__)
2141 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2144 /* Requires init_predump_symbols(). */
2145 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2150 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2151 * and the default open disciplines. */
2152 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2153 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2155 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2156 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2157 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2159 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2160 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2161 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2163 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2164 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2165 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2167 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2168 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2171 sv_setpvn(sv, ":utf8\0:utf8", 11);
2173 sv_setpvn(sv, ":utf8\0", 6);
2176 sv_setpvn(sv, "\0:utf8", 6);
2184 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2185 if (strEQ(s, "unsafe"))
2186 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2187 else if (strEQ(s, "safe"))
2188 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2190 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2197 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2201 PL_xmlfp = PerlIO_stdout();
2203 PL_xmlfp = PerlIO_open(s, "w");
2205 Perl_croak(aTHX_ "Can't open %s", s);
2207 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2213 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2214 PL_madskills = atoi(s);
2215 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2220 lex_start(linestr_sv, rsfp, TRUE);
2221 PL_subname = newSVpvs("main");
2223 if (add_read_e_script)
2224 filter_add(read_e_script, NULL);
2226 /* now parse the script */
2228 SETERRNO(0,SS_NORMAL);
2229 #ifdef MACOS_TRADITIONAL
2230 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2232 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2234 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2235 MacPerl_MPWFileName(PL_origfilename));
2239 if (yyparse() || PL_parser->error_count) {
2241 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2243 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2248 CopLINE_set(PL_curcop, 0);
2249 PL_curstash = PL_defstash;
2251 SvREFCNT_dec(PL_e_script);
2259 SAVECOPFILE(PL_curcop);
2260 SAVECOPLINE(PL_curcop);
2261 gv_check(PL_defstash);
2270 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2271 dump_mstats("after compilation:");
2281 =for apidoc perl_run
2283 Tells a Perl interpreter to run. See L<perlembed>.
2296 PERL_ARGS_ASSERT_PERL_RUN;
2297 #ifndef MULTIPLICITY
2298 PERL_UNUSED_ARG(my_perl);
2301 oldscope = PL_scopestack_ix;
2309 cxstack_ix = -1; /* start context stack again */
2311 case 0: /* normal completion */
2315 case 2: /* my_exit() */
2316 while (PL_scopestack_ix > oldscope)
2319 PL_curstash = PL_defstash;
2320 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2321 PL_endav && !PL_minus_c)
2322 call_list(oldscope, PL_endav);
2324 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2325 dump_mstats("after execution: ");
2331 POPSTACK_TO(PL_mainstack);
2334 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2345 S_run_body(pTHX_ I32 oldscope)
2348 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2349 PL_sawampersand ? "Enabling" : "Omitting"));
2351 if (!PL_restartop) {
2355 exit(0); /* less likely to core dump than my_exit(0) */
2358 DEBUG_x(dump_all());
2361 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2365 #ifdef MACOS_TRADITIONAL
2366 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2367 (gMacPerl_ErrorFormat ? "# " : ""),
2368 MacPerl_MPWFileName(PL_origfilename));
2370 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2374 if (PERLDB_SINGLE && PL_DBsingle)
2375 sv_setiv(PL_DBsingle, 1);
2377 call_list(oldscope, PL_initav);
2378 #ifdef PERL_DEBUG_READONLY_OPS
2379 Perl_pending_Slabs_to_ro(aTHX);
2386 PL_op = PL_restartop;
2390 else if (PL_main_start) {
2391 CvDEPTH(PL_main_cv) = 1;
2392 PL_op = PL_main_start;
2400 =head1 SV Manipulation Functions
2402 =for apidoc p||get_sv
2404 Returns the SV of the specified Perl scalar. If C<create> is set and the
2405 Perl variable does not exist then it will be created. If C<create> is not
2406 set and the variable does not exist then NULL is returned.
2412 Perl_get_sv(pTHX_ const char *name, I32 create)
2416 PERL_ARGS_ASSERT_GET_SV;
2418 gv = gv_fetchpv(name, create, SVt_PV);
2425 =head1 Array Manipulation Functions
2427 =for apidoc p||get_av
2429 Returns the AV of the specified Perl array. If C<create> is set and the
2430 Perl variable does not exist then it will be created. If C<create> is not
2431 set and the variable does not exist then NULL is returned.
2437 Perl_get_av(pTHX_ const char *name, I32 create)
2439 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2441 PERL_ARGS_ASSERT_GET_AV;
2451 =head1 Hash Manipulation Functions
2453 =for apidoc p||get_hv
2455 Returns the HV of the specified Perl hash. If C<create> is set and the
2456 Perl variable does not exist then it will be created. If C<create> is not
2457 set and the variable does not exist then NULL is returned.
2463 Perl_get_hv(pTHX_ const char *name, I32 create)
2465 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2467 PERL_ARGS_ASSERT_GET_HV;
2477 =head1 CV Manipulation Functions
2479 =for apidoc p||get_cvn_flags
2481 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2482 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2483 exist then it will be declared (which has the same effect as saying
2484 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2485 then NULL is returned.
2487 =for apidoc p||get_cv
2489 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2495 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2497 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2498 /* XXX this is probably not what they think they're getting.
2499 * It has the same effect as "sub name;", i.e. just a forward
2502 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2504 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2505 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2506 return newSUB(start_subparse(FALSE, 0),
2507 newSVOP(OP_CONST, 0, sv),
2516 Perl_get_cv(pTHX_ const char *name, I32 flags)
2518 PERL_ARGS_ASSERT_GET_CV;
2520 return get_cvn_flags(name, strlen(name), flags);
2523 /* Be sure to refetch the stack pointer after calling these routines. */
2527 =head1 Callback Functions
2529 =for apidoc p||call_argv
2531 Performs a callback to the specified Perl sub. See L<perlcall>.
2537 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2539 /* See G_* flags in cop.h */
2540 /* null terminated arg list */
2545 PERL_ARGS_ASSERT_CALL_ARGV;
2550 mXPUSHs(newSVpv(*argv,0));
2555 return call_pv(sub_name, flags);
2559 =for apidoc p||call_pv
2561 Performs a callback to the specified Perl sub. See L<perlcall>.
2567 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2568 /* name of the subroutine */
2569 /* See G_* flags in cop.h */
2571 PERL_ARGS_ASSERT_CALL_PV;
2573 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2577 =for apidoc p||call_method
2579 Performs a callback to the specified Perl method. The blessed object must
2580 be on the stack. See L<perlcall>.
2586 Perl_call_method(pTHX_ const char *methname, I32 flags)
2587 /* name of the subroutine */
2588 /* See G_* flags in cop.h */
2590 PERL_ARGS_ASSERT_CALL_METHOD;
2592 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2595 /* May be called with any of a CV, a GV, or an SV containing the name. */
2597 =for apidoc p||call_sv
2599 Performs a callback to the Perl sub whose name is in the SV. See
2606 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2607 /* See G_* flags in cop.h */
2610 LOGOP myop; /* fake syntax tree node */
2615 bool oldcatch = CATCH_GET;
2617 OP* const oldop = PL_op;
2620 PERL_ARGS_ASSERT_CALL_SV;
2622 if (flags & G_DISCARD) {
2626 if (!(flags & G_WANT)) {
2627 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2632 Zero(&myop, 1, LOGOP);
2633 myop.op_next = NULL;
2634 if (!(flags & G_NOARGS))
2635 myop.op_flags |= OPf_STACKED;
2636 myop.op_flags |= OP_GIMME_REVERSE(flags);
2640 EXTEND(PL_stack_sp, 1);
2641 *++PL_stack_sp = sv;
2643 oldscope = PL_scopestack_ix;
2645 if (PERLDB_SUB && PL_curstash != PL_debstash
2646 /* Handle first BEGIN of -d. */
2647 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2648 /* Try harder, since this may have been a sighandler, thus
2649 * curstash may be meaningless. */
2650 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2651 && !(flags & G_NODEBUG))
2652 PL_op->op_private |= OPpENTERSUB_DB;
2654 if (flags & G_METHOD) {
2655 Zero(&method_op, 1, UNOP);
2656 method_op.op_next = PL_op;
2657 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2658 method_op.op_type = OP_METHOD;
2659 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2660 myop.op_type = OP_ENTERSUB;
2661 PL_op = (OP*)&method_op;
2664 if (!(flags & G_EVAL)) {
2666 CALL_BODY_SUB((OP*)&myop);
2667 retval = PL_stack_sp - (PL_stack_base + oldmark);
2668 CATCH_SET(oldcatch);
2671 myop.op_other = (OP*)&myop;
2673 create_eval_scope(flags|G_FAKINGEVAL);
2681 CALL_BODY_SUB((OP*)&myop);
2682 retval = PL_stack_sp - (PL_stack_base + oldmark);
2683 if (!(flags & G_KEEPERR))
2684 sv_setpvn(ERRSV,"",0);
2690 /* my_exit() was called */
2691 PL_curstash = PL_defstash;
2694 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2695 Perl_croak(aTHX_ "Callback called exit");
2700 PL_op = PL_restartop;
2704 PL_stack_sp = PL_stack_base + oldmark;
2705 if ((flags & G_WANT) == G_ARRAY)
2709 *++PL_stack_sp = &PL_sv_undef;
2714 if (PL_scopestack_ix > oldscope)
2715 delete_eval_scope();
2719 if (flags & G_DISCARD) {
2720 PL_stack_sp = PL_stack_base + oldmark;
2729 /* Eval a string. The G_EVAL flag is always assumed. */
2732 =for apidoc p||eval_sv
2734 Tells Perl to C<eval> the string in the SV.
2740 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2742 /* See G_* flags in cop.h */
2746 UNOP myop; /* fake syntax tree node */
2747 VOL I32 oldmark = SP - PL_stack_base;
2750 OP* const oldop = PL_op;
2753 PERL_ARGS_ASSERT_EVAL_SV;
2755 if (flags & G_DISCARD) {
2762 Zero(PL_op, 1, UNOP);
2763 EXTEND(PL_stack_sp, 1);
2764 *++PL_stack_sp = sv;
2766 if (!(flags & G_NOARGS))
2767 myop.op_flags = OPf_STACKED;
2768 myop.op_next = NULL;
2769 myop.op_type = OP_ENTEREVAL;
2770 myop.op_flags |= OP_GIMME_REVERSE(flags);
2771 if (flags & G_KEEPERR)
2772 myop.op_flags |= OPf_SPECIAL;
2774 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2775 * before a PUSHEVAL, which corrupts the stack after a croak */
2776 TAINT_PROPER("eval_sv()");
2782 CALL_BODY_EVAL((OP*)&myop);
2783 retval = PL_stack_sp - (PL_stack_base + oldmark);
2784 if (!(flags & G_KEEPERR))
2785 sv_setpvn(ERRSV,"",0);
2791 /* my_exit() was called */
2792 PL_curstash = PL_defstash;
2795 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2796 Perl_croak(aTHX_ "Callback called exit");
2801 PL_op = PL_restartop;
2805 PL_stack_sp = PL_stack_base + oldmark;
2806 if ((flags & G_WANT) == G_ARRAY)
2810 *++PL_stack_sp = &PL_sv_undef;
2816 if (flags & G_DISCARD) {
2817 PL_stack_sp = PL_stack_base + oldmark;
2827 =for apidoc p||eval_pv
2829 Tells Perl to C<eval> the given string and return an SV* result.
2835 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2839 SV* sv = newSVpv(p, 0);
2841 PERL_ARGS_ASSERT_EVAL_PV;
2843 eval_sv(sv, G_SCALAR);
2850 if (croak_on_error && SvTRUE(ERRSV)) {
2851 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2857 /* Require a module. */
2860 =head1 Embedding Functions
2862 =for apidoc p||require_pv
2864 Tells Perl to C<require> the file named by the string argument. It is
2865 analogous to the Perl code C<eval "require '$file'">. It's even
2866 implemented that way; consider using load_module instead.
2871 Perl_require_pv(pTHX_ const char *pv)
2877 PERL_ARGS_ASSERT_REQUIRE_PV;
2879 PUSHSTACKi(PERLSI_REQUIRE);
2881 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2882 eval_sv(sv_2mortal(sv), G_DISCARD);
2888 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2890 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2892 PERL_ARGS_ASSERT_MAGICNAME;
2895 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2899 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2901 /* This message really ought to be max 23 lines.
2902 * Removed -h because the user already knows that option. Others? */
2904 static const char * const usage_msg[] = {
2905 "-0[octal] specify record separator (\\0, if no argument)",
2906 "-a autosplit mode with -n or -p (splits $_ into @F)",
2907 "-C[number/list] enables the listed Unicode features",
2908 "-c check syntax only (runs BEGIN and CHECK blocks)",
2909 "-d[:debugger] run program under debugger",
2910 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2911 "-e program one line of program (several -e's allowed, omit programfile)",
2912 "-E program like -e, but enables all optional features",
2913 "-f don't do $sitelib/sitecustomize.pl at startup",
2914 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2915 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2916 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2917 "-l[octal] enable line ending processing, specifies line terminator",
2918 "-[mM][-]module execute \"use/no module...\" before executing program",
2919 "-n assume \"while (<>) { ... }\" loop around program",
2920 "-p assume loop like -n but print line also, like sed",
2921 "-s enable rudimentary parsing for switches after programfile",
2922 "-S look for programfile using PATH environment variable",
2923 "-t enable tainting warnings",
2924 "-T enable tainting checks",
2925 "-u dump core after parsing program",
2926 "-U allow unsafe operations",
2927 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2928 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2929 "-w enable many useful warnings (RECOMMENDED)",
2930 "-W enable all warnings",
2931 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2932 "-X disable all warnings",
2936 const char * const *p = usage_msg;
2938 PERL_ARGS_ASSERT_USAGE;
2940 PerlIO_printf(PerlIO_stdout(),
2941 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2944 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2947 /* convert a string of -D options (or digits) into an int.
2948 * sets *s to point to the char after the options */
2952 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2954 static const char * const usage_msgd[] = {
2955 " Debugging flag values: (see also -d)",
2956 " p Tokenizing and parsing (with v, displays parse stack)",
2957 " s Stack snapshots (with v, displays all stacks)",
2958 " l Context (loop) stack processing",
2959 " t Trace execution",
2960 " o Method and overloading resolution",
2961 " c String/numeric conversions",
2962 " P Print profiling info, source file input state",
2963 " m Memory allocation",
2964 " f Format processing",
2965 " r Regular expression parsing and execution",
2966 " x Syntax tree dump",
2967 " u Tainting checks",
2968 " H Hash dump -- usurps values()",
2969 " X Scratchpad allocation",
2972 " R Include reference counts of dumped variables (eg when using -Ds)",
2973 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2974 " v Verbose: use in conjunction with other flags",
2976 " A Consistency checks on internal structures",
2977 " q quiet - currently only suppresses the 'EXECUTING' message",
2982 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2985 /* if adding extra options, remember to update DEBUG_MASK */
2986 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2988 for (; isALNUM(**s); (*s)++) {
2989 const char * const d = strchr(debopts,**s);
2991 i |= 1 << (d - debopts);
2992 else if (ckWARN_d(WARN_DEBUGGING))
2993 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2994 "invalid option -D%c, use -D'' to see choices\n", **s);
2997 else if (isDIGIT(**s)) {
2999 for (; isALNUM(**s); (*s)++) ;
3001 else if (givehelp) {
3002 const char *const *p = usage_msgd;
3003 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
3006 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3007 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3008 "-Dp not implemented on this platform\n");
3014 /* This routine handles any switches that can be given during run */
3017 Perl_moreswitches(pTHX_ const char *s)
3021 const char option = *s; /* used to remember option in -m/-M code */
3023 PERL_ARGS_ASSERT_MORESWITCHES;
3031 SvREFCNT_dec(PL_rs);
3032 if (s[1] == 'x' && s[2]) {
3033 const char *e = s+=2;
3039 flags = PERL_SCAN_SILENT_ILLDIGIT;
3040 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3041 if (s + numlen < e) {
3042 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3046 PL_rs = newSVpvs("");
3047 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3048 tmps = (U8*)SvPVX(PL_rs);
3049 uvchr_to_utf8(tmps, rschar);
3050 SvCUR_set(PL_rs, UNISKIP(rschar));
3055 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3056 if (rschar & ~((U8)~0))
3057 PL_rs = &PL_sv_undef;
3058 else if (!rschar && numlen >= 2)
3059 PL_rs = newSVpvs("");
3061 char ch = (char)rschar;
3062 PL_rs = newSVpvn(&ch, 1);
3065 sv_setsv(get_sv("/", TRUE), PL_rs);
3070 PL_unicode = parse_unicode_opts( (const char **)&s );
3071 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3077 while (*s && !isSPACE(*s)) ++s;
3078 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3089 forbid_setid('d', FALSE);
3092 /* -dt indicates to the debugger that threads will be used */
3093 if (*s == 't' && !isALNUM(s[1])) {
3095 my_setenv("PERL5DB_THREADED", "1");
3098 /* The following permits -d:Mod to accepts arguments following an =
3099 in the fashion that -MSome::Mod does. */
3100 if (*s == ':' || *s == '=') {
3101 const char *start = ++s;
3102 const char *const end = s + strlen(s);
3103 SV * const sv = newSVpvs("use Devel::");
3105 /* We now allow -d:Module=Foo,Bar */
3106 while(isALNUM(*s) || *s==':') ++s;
3108 sv_catpvn(sv, start, end - start);
3110 sv_catpvn(sv, start, s-start);
3111 /* Don't use NUL as q// delimiter here, this string goes in the
3113 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3116 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3120 PL_perldb = PERLDB_ALL;
3127 forbid_setid('D', FALSE);
3129 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3130 #else /* !DEBUGGING */
3131 if (ckWARN_d(WARN_DEBUGGING))
3132 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3133 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3134 for (s++; isALNUM(*s); s++) ;
3139 usage(PL_origargv[0]);
3142 Safefree(PL_inplace);
3143 #if defined(__CYGWIN__) /* do backup extension automagically */
3144 if (*(s+1) == '\0') {
3145 PL_inplace = savepvs(".bak");
3148 #endif /* __CYGWIN__ */
3150 const char * const start = ++s;
3151 while (*s && !isSPACE(*s))
3154 PL_inplace = savepvn(start, s - start);
3158 if (*s == '-') /* Additional switches on #! line. */
3162 case 'I': /* -I handled both here and in parse_body() */
3163 forbid_setid('I', FALSE);
3165 while (*s && isSPACE(*s))
3170 /* ignore trailing spaces (possibly followed by other switches) */
3172 for (e = p; *e && !isSPACE(*e); e++) ;
3176 } while (*p && *p != '-');
3177 e = savepvn(s, e-s);
3178 incpush(e, TRUE, TRUE, FALSE, FALSE);
3185 Perl_croak(aTHX_ "No directory specified for -I");
3191 SvREFCNT_dec(PL_ors_sv);
3197 PL_ors_sv = newSVpvs("\n");
3198 numlen = 3 + (*s == '0');
3199 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3203 if (RsPARA(PL_rs)) {
3204 PL_ors_sv = newSVpvs("\n\n");
3207 PL_ors_sv = newSVsv(PL_rs);
3212 forbid_setid('M', FALSE); /* XXX ? */
3215 forbid_setid('m', FALSE); /* XXX ? */
3220 const char *use = "use ";
3222 /* -M-foo == 'no foo' */
3223 /* Leading space on " no " is deliberate, to make both
3224 possibilities the same length. */
3225 if (*s == '-') { use = " no "; ++s; }
3226 sv = newSVpvn(use,4);
3228 /* We allow -M'Module qw(Foo Bar)' */
3229 while(isALNUM(*s) || *s==':') {
3238 Perl_croak(aTHX_ "Module name required with -%c option",
3241 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3242 "contains single ':'",
3243 (int)(s - start), start, option);
3244 end = s + strlen(s);
3246 sv_catpvn(sv, start, end - start);
3247 if (option == 'm') {
3249 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3250 sv_catpvs( sv, " ()");
3253 sv_catpvn(sv, start, s-start);
3254 /* Use NUL as q''-delimiter. */
3255 sv_catpvs(sv, " split(/,/,q\0");
3257 sv_catpvn(sv, s, end - s);
3258 sv_catpvs(sv, "\0)");
3261 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3264 Perl_croak(aTHX_ "Missing argument to -%c", option);
3275 forbid_setid('s', FALSE);
3276 PL_doswitches = TRUE;
3290 #ifdef MACOS_TRADITIONAL
3291 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3293 PL_do_undump = TRUE;
3301 if (!sv_derived_from(PL_patchlevel, "version"))
3302 upg_version(PL_patchlevel, TRUE);
3304 PerlIO_printf(PerlIO_stdout(),
3305 Perl_form(aTHX_ "\nThis is perl, %"SVf
3306 #ifdef PERL_PATCHNUM
3307 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3310 SVfARG(vstringify(PL_patchlevel)),
3313 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3314 PerlIO_printf(PerlIO_stdout(),
3315 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3316 SVfARG(vstringify(PL_patchlevel))));
3317 PerlIO_printf(PerlIO_stdout(),
3318 Perl_form(aTHX_ " built under %s at %s %s\n",
3319 OSNAME, __DATE__, __TIME__));
3320 PerlIO_printf(PerlIO_stdout(),
3321 Perl_form(aTHX_ " OS Specific Release: %s\n",
3325 #if defined(LOCAL_PATCH_COUNT)
3326 if (LOCAL_PATCH_COUNT > 0)
3327 PerlIO_printf(PerlIO_stdout(),
3328 "\n(with %d registered patch%s, "
3329 "see perl -V for more detail)",
3331 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3334 PerlIO_printf(PerlIO_stdout(),
3335 "\n\nCopyright 1987-2007, Larry Wall\n");
3336 #ifdef MACOS_TRADITIONAL
3337 PerlIO_printf(PerlIO_stdout(),
3338 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3339 "maintained by Chris Nandor\n");
3342 PerlIO_printf(PerlIO_stdout(),
3343 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3346 PerlIO_printf(PerlIO_stdout(),
3347 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3348 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3351 PerlIO_printf(PerlIO_stdout(),
3352 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3353 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3356 PerlIO_printf(PerlIO_stdout(),
3357 "atariST series port, ++jrb bammi@cadence.com\n");
3360 PerlIO_printf(PerlIO_stdout(),
3361 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3364 PerlIO_printf(PerlIO_stdout(),
3365 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3368 PerlIO_printf(PerlIO_stdout(),
3369 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3372 PerlIO_printf(PerlIO_stdout(),
3373 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3376 PerlIO_printf(PerlIO_stdout(),
3377 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3380 PerlIO_printf(PerlIO_stdout(),
3381 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3384 PerlIO_printf(PerlIO_stdout(),
3385 "MiNT port by Guido Flohr, 1997-1999\n");
3388 PerlIO_printf(PerlIO_stdout(),
3389 "EPOC port by Olaf Flebbe, 1999-2002\n");
3392 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3393 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3396 #ifdef __SYMBIAN32__
3397 PerlIO_printf(PerlIO_stdout(),
3398 "Symbian port by Nokia, 2004-2005\n");
3400 #ifdef BINARY_BUILD_NOTICE
3401 BINARY_BUILD_NOTICE;
3403 PerlIO_printf(PerlIO_stdout(),
3405 Perl may be copied only under the terms of either the Artistic License or the\n\
3406 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3407 Complete documentation for Perl, including FAQ lists, should be found on\n\
3408 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3409 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3412 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3413 PL_dowarn |= G_WARN_ON;
3418 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3419 if (!specialWARN(PL_compiling.cop_warnings))
3420 PerlMemShared_free(PL_compiling.cop_warnings);
3421 PL_compiling.cop_warnings = pWARN_ALL ;
3425 PL_dowarn = G_WARN_ALL_OFF;
3426 if (!specialWARN(PL_compiling.cop_warnings))
3427 PerlMemShared_free(PL_compiling.cop_warnings);
3428 PL_compiling.cop_warnings = pWARN_NONE ;
3433 if (s[1] == '-') /* Additional switches on #! line. */
3438 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3444 #ifdef ALTERNATE_SHEBANG
3445 case 'S': /* OS/2 needs -S on "extproc" line. */
3449 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3454 /* compliments of Tom Christiansen */
3456 /* unexec() can be found in the Gnu emacs distribution */
3457 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3460 Perl_my_unexec(pTHX)
3462 PERL_UNUSED_CONTEXT;
3464 SV * prog = newSVpv(BIN_EXP, 0);
3465 SV * file = newSVpv(PL_origfilename, 0);
3469 sv_catpvs(prog, "/perl");
3470 sv_catpvs(file, ".perldump");
3472 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3473 /* unexec prints msg to stderr in case of failure */
3474 PerlProc_exit(status);
3477 # include <lib$routines.h>
3478 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3479 # elif defined(WIN32) || defined(__CYGWIN__)
3480 Perl_croak(aTHX_ "dump is not supported");
3482 ABORT(); /* for use with undump */
3487 /* initialize curinterp */
3493 # define PERLVAR(var,type)
3494 # define PERLVARA(var,n,type)
3495 # if defined(PERL_IMPLICIT_CONTEXT)
3496 # define PERLVARI(var,type,init) aTHX->var = init;
3497 # define PERLVARIC(var,type,init) aTHX->var = init;
3499 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3500 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3502 # include "intrpvar.h"
3508 # define PERLVAR(var,type)
3509 # define PERLVARA(var,n,type)
3510 # define PERLVARI(var,type,init) PL_##var = init;
3511 # define PERLVARIC(var,type,init) PL_##var = init;
3512 # include "intrpvar.h"
3519 /* As these are inside a structure, PERLVARI isn't capable of initialising
3521 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3522 PL_reg_poscache = PL_reg_starttry = NULL;
3526 S_init_main_stash(pTHX)
3531 PL_curstash = PL_defstash = newHV();
3532 /* We know that the string "main" will be in the global shared string
3533 table, so it's a small saving to use it rather than allocate another
3535 PL_curstname = newSVpvs_share("main");
3536 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3537 /* If we hadn't caused another reference to "main" to be in the shared
3538 string table above, then it would be worth reordering these two,
3539 because otherwise all we do is delete "main" from it as a consequence
3540 of the SvREFCNT_dec, only to add it again with hv_name_set */
3541 SvREFCNT_dec(GvHV(gv));
3542 hv_name_set(PL_defstash, "main", 4, 0);
3543 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3545 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3547 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3548 GvMULTI_on(PL_incgv);
3549 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3550 GvMULTI_on(PL_hintgv);
3551 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3552 SvREFCNT_inc_simple_void(PL_defgv);
3553 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3554 SvREFCNT_inc_simple_void(PL_errgv);
3555 GvMULTI_on(PL_errgv);
3556 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3557 GvMULTI_on(PL_replgv);
3558 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3559 #ifdef PERL_DONT_CREATE_GVSV
3562 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3563 sv_setpvn(ERRSV, "", 0);
3564 PL_curstash = PL_defstash;
3565 CopSTASH_set(&PL_compiling, PL_defstash);
3566 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3567 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3569 /* We must init $/ before switches are processed. */
3570 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3574 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3575 bool *suidscript, PerlIO **rsfpp)
3580 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3583 PL_origfilename = savepvs("-e");
3586 /* if find_script() returns, it returns a malloc()-ed value */
3587 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3589 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3590 const char *s = scriptname + 8;
3596 * Tell apart "normal" usage of fdscript, e.g.
3597 * with bash on FreeBSD:
3598 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3599 * from usage in suidperl.
3600 * Does any "normal" usage leave garbage after the number???
3601 * Is it a mistake to use a similar /dev/fd/ construct for
3606 * Be supersafe and do some sanity-checks.
3607 * Still, can we be sure we got the right thing?
3610 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3613 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3615 scriptname = savepv(s + 1);
3616 Safefree(PL_origfilename);
3617 PL_origfilename = (char *)scriptname;
3622 CopFILE_free(PL_curcop);
3623 CopFILE_set(PL_curcop, PL_origfilename);
3624 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3625 scriptname = (char *)"";
3626 if (fdscript >= 0) {
3627 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3628 # if defined(HAS_FCNTL) && defined(F_SETFD)
3630 /* ensure close-on-exec */
3631 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3636 Perl_croak(aTHX_ "sperl needs fd script\n"
3637 "You should not call sperl directly; do you need to "
3638 "change a #! line\nfrom sperl to perl?\n");
3641 * Do not open (or do other fancy stuff) while setuid.
3642 * Perl does the open, and hands script to suidperl on a fd;
3643 * suidperl only does some checks, sets up UIDs and re-execs
3644 * perl with that fd as it has always done.
3648 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3651 else if (!*scriptname) {
3652 forbid_setid(0, *suidscript);
3653 *rsfpp = PerlIO_stdin();
3656 #ifdef FAKE_BIT_BUCKET
3657 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3658 * is called) and still have the "-e" work. (Believe it or not,
3659 * a /dev/null is required for the "-e" to work because source
3660 * filter magic is used to implement it. ) This is *not* a general
3661 * replacement for a /dev/null. What we do here is create a temp
3662 * file (an empty file), open up that as the script, and then
3663 * immediately close and unlink it. Close enough for jazz. */
3664 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3665 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3666 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3667 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3668 FAKE_BIT_BUCKET_TEMPLATE
3670 const char * const err = "Failed to create a fake bit bucket";
3671 if (strEQ(scriptname, BIT_BUCKET)) {
3672 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3673 int tmpfd = mkstemp(tmpname);
3675 scriptname = tmpname;
3678 Perl_croak(aTHX_ err);
3681 scriptname = mktemp(tmpname);
3683 Perl_croak(aTHX_ err);
3688 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3689 #ifdef FAKE_BIT_BUCKET
3690 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3691 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3692 && strlen(scriptname) == sizeof(tmpname) - 1) {
3695 scriptname = BIT_BUCKET;
3697 # if defined(HAS_FCNTL) && defined(F_SETFD)
3699 /* ensure close-on-exec */
3700 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3703 #endif /* IAMSUID */
3705 /* PSz 16 Sep 03 Keep neat error message */
3707 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3709 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3710 CopFILE(PL_curcop), Strerror(errno));
3716 * I_SYSSTATVFS HAS_FSTATVFS
3718 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3719 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3720 * here so that metaconfig picks them up. */
3724 S_fd_on_nosuid_fs(pTHX_ int fd)
3727 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3728 * but is needed also on machines without setreuid.
3729 * Seems safe enough to run as root.
3731 int check_okay = 0; /* able to do all the required sys/libcalls */
3732 int on_nosuid = 0; /* the fd is on a nosuid fs */
3734 * Need to check noexec also: nosuid might not be set, the average
3735 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3737 int on_noexec = 0; /* the fd is on a noexec fs */
3740 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3741 * fstatvfs() is UNIX98.
3742 * fstatfs() is 4.3 BSD.
3743 * ustat()+getmnt() is pre-4.3 BSD.
3744 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3745 * an irrelevant filesystem while trying to reach the right one.
3748 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3750 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3751 defined(HAS_FSTATVFS)
3752 # define FD_ON_NOSUID_CHECK_OKAY
3753 struct statvfs stfs;
3755 check_okay = fstatvfs(fd, &stfs) == 0;
3756 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3758 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3759 on platforms where it is present. */
3760 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3762 # endif /* fstatvfs */
3764 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3765 defined(PERL_MOUNT_NOSUID) && \
3766 defined(PERL_MOUNT_NOEXEC) && \
3767 defined(HAS_FSTATFS) && \
3768 defined(HAS_STRUCT_STATFS) && \
3769 defined(HAS_STRUCT_STATFS_F_FLAGS)
3770 # define FD_ON_NOSUID_CHECK_OKAY
3773 check_okay = fstatfs(fd, &stfs) == 0;
3774 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3775 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3776 # endif /* fstatfs */
3778 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3779 defined(PERL_MOUNT_NOSUID) && \
3780 defined(PERL_MOUNT_NOEXEC) && \
3781 defined(HAS_FSTAT) && \
3782 defined(HAS_USTAT) && \
3783 defined(HAS_GETMNT) && \
3784 defined(HAS_STRUCT_FS_DATA) && \
3786 # define FD_ON_NOSUID_CHECK_OKAY
3789 if (fstat(fd, &fdst) == 0) {
3791 if (ustat(fdst.st_dev, &us) == 0) {
3793 /* NOSTAT_ONE here because we're not examining fields which
3794 * vary between that case and STAT_ONE. */
3795 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3796 size_t cmplen = sizeof(us.f_fname);
3797 if (sizeof(fsd.fd_req.path) < cmplen)
3798 cmplen = sizeof(fsd.fd_req.path);
3799 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3800 fdst.st_dev == fsd.fd_req.dev) {
3802 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3803 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3808 # endif /* fstat+ustat+getmnt */
3810 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3811 defined(HAS_GETMNTENT) && \
3812 defined(HAS_HASMNTOPT) && \
3813 defined(MNTOPT_NOSUID) && \
3814 defined(MNTOPT_NOEXEC)
3815 # define FD_ON_NOSUID_CHECK_OKAY
3816 FILE *mtab = fopen("/etc/mtab", "r");
3817 struct mntent *entry;
3820 if (mtab && (fstat(fd, &stb) == 0)) {
3821 while (entry = getmntent(mtab)) {
3822 if (stat(entry->mnt_dir, &fsb) == 0
3823 && fsb.st_dev == stb.st_dev)
3825 /* found the filesystem */
3827 if (hasmntopt(entry, MNTOPT_NOSUID))
3829 if (hasmntopt(entry, MNTOPT_NOEXEC))
3832 } /* A single fs may well fail its stat(). */
3837 # endif /* getmntent+hasmntopt */
3840 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3842 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3844 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3845 return ((!check_okay) || on_nosuid || on_noexec);
3847 #endif /* IAMSUID */
3851 S_validate_suid(pTHX_ const char *validarg,
3853 const char *scriptname,
3859 SV *linestr_sv, PerlIO *rsfp)
3864 PERL_ARGS_ASSERT_VALIDATE_SUID;
3866 /* do we need to emulate setuid on scripts? */
3868 /* This code is for those BSD systems that have setuid #! scripts disabled
3869 * in the kernel because of a security problem. Merely defining DOSUID
3870 * in perl will not fix that problem, but if you have disabled setuid
3871 * scripts in the kernel, this will attempt to emulate setuid and setgid
3872 * on scripts that have those now-otherwise-useless bits set. The setuid
3873 * root version must be called suidperl or sperlN.NNN. If regular perl
3874 * discovers that it has opened a setuid script, it calls suidperl with
3875 * the same argv that it had. If suidperl finds that the script it has
3876 * just opened is NOT setuid root, it sets the effective uid back to the
3877 * uid. We don't just make perl setuid root because that loses the
3878 * effective uid we had before invoking perl, if it was different from the
3881 * Description/comments above do not match current workings:
3882 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3883 * suidperl called with script open and name changed to /dev/fd/N/X;
3884 * suidperl croaks if script is not setuid;
3885 * making perl setuid would be a huge security risk (and yes, that
3886 * would lose any euid we might have had).
3888 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3889 * be defined in suidperl only. suidperl must be setuid root. The
3890 * Configure script will set this up for you if you want it.
3893 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3894 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3895 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3897 const char *linestr;
3901 if (fdscript < 0 || !suidscript)
3902 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3904 * Since the script is opened by perl, not suidperl, some of these
3905 * checks are superfluous. Leaving them in probably does not lower
3909 * Do checks even for systems with no HAS_SETREUID.
3910 * We used to swap, then re-swap UIDs with
3911 # ifdef HAS_SETREUID
3912 if (setreuid(PL_euid,PL_uid) < 0
3913 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3914 Perl_croak(aTHX_ "Can't swap uid and euid");
3916 # ifdef HAS_SETREUID
3917 if (setreuid(PL_uid,PL_euid) < 0
3918 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3919 Perl_croak(aTHX_ "Can't reswap uid and euid");
3923 /* On this access check to make sure the directories are readable,
3924 * there is actually a small window that the user could use to make
3925 * filename point to an accessible directory. So there is a faint
3926 * chance that someone could execute a setuid script down in a
3927 * non-accessible directory. I don't know what to do about that.
3928 * But I don't think it's too important. The manual lies when
3929 * it says access() is useful in setuid programs.
3931 * So, access() is pretty useless... but not harmful... do anyway.
3933 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3934 Perl_croak(aTHX_ "Can't access() script\n");
3937 /* If we can swap euid and uid, then we can determine access rights
3938 * with a simple stat of the file, and then compare device and
3939 * inode to make sure we did stat() on the same file we opened.
3940 * Then we just have to make sure he or she can execute it.
3943 * As the script is opened by perl, not suidperl, we do not need to
3944 * care much about access rights.
3946 * The 'script changed' check is needed, or we can get lied to
3947 * about $0 with e.g.
3948 * suidperl /dev/fd/4//bin/x 4<setuidscript
3949 * Without HAS_SETREUID, is it safe to stat() as root?
3951 * Are there any operating systems that pass /dev/fd/xxx for setuid
3952 * scripts, as suggested/described in perlsec(1)? Surely they do not
3953 * pass the script name as we do, so the "script changed" test would
3954 * fail for them... but we never get here with
3955 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3957 * This is one place where we must "lie" about return status: not
3958 * say if the stat() failed. We are doing this as root, and could
3959 * be tricked into reporting existence or not of files that the
3960 * "plain" user cannot even see.
3964 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3965 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3966 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3967 Perl_croak(aTHX_ "Setuid script changed\n");
3971 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3972 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3975 * We used to do this check as the "plain" user (after swapping
3976 * UIDs). But the check for nosuid and noexec filesystem is needed,
3977 * and should be done even without HAS_SETREUID. (Maybe those
3978 * operating systems do not have such mount options anyway...)
3979 * Seems safe enough to do as root.
3981 # if !defined(NO_NOSUID_CHECK)
3982 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3983 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3986 # endif /* IAMSUID */
3988 if (!S_ISREG(PL_statbuf.st_mode)) {
3989 Perl_croak(aTHX_ "Setuid script not plain file\n");
3991 if (PL_statbuf.st_mode & S_IWOTH)
3992 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3993 PL_doswitches = FALSE; /* -s is insecure in suid */
3994 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3995 CopLINE_inc(PL_curcop);
3996 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3997 Perl_croak(aTHX_ "No #! line");
3998 linestr = SvPV_nolen_const(linestr_sv);
3999 /* required even on Sys V */
4000 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4001 Perl_croak(aTHX_ "No #! line");
4005 /* Sanity check on line length */
4006 s_end = s + strlen(s);
4007 if (s_end == s || (s_end - s) > 4000)
4008 Perl_croak(aTHX_ "Very long #! line");
4009 /* Allow more than a single space after #! */
4010 while (isSPACE(*s)) s++;
4011 /* Sanity check on buffer end */
4012 while ((*s) && !isSPACE(*s)) s++;
4013 for (s2 = s; (s2 > linestr &&
4014 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4015 || s2[-1] == '-')); s2--) ;
4016 /* Sanity check on buffer start */
4017 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4018 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4019 Perl_croak(aTHX_ "Not a perl script");
4020 while (*s == ' ' || *s == '\t') s++;
4022 * #! arg must be what we saw above. They can invoke it by
4023 * mentioning suidperl explicitly, but they may not add any strange
4024 * arguments beyond what #! says if they do invoke suidperl that way.
4027 * The way validarg was set up, we rely on the kernel to start
4028 * scripts with argv[1] set to contain all #! line switches (the
4032 * Check that we got all the arguments listed in the #! line (not
4033 * just that there are no extraneous arguments). Might not matter
4034 * much, as switches from #! line seem to be acted upon (also), and
4035 * so may be checked and trapped in perl. But, security checks must
4036 * be done in suidperl and not deferred to perl. Note that suidperl
4037 * does not get around to parsing (and checking) the switches on
4038 * the #! line (but execs perl sooner).
4039 * Allow (require) a trailing newline (which may be of two
4040 * characters on some architectures?) (but no other trailing
4043 len = strlen(validarg);
4044 if (strEQ(validarg," PHOOEY ") ||
4045 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4046 !((s_end - s) == len+1
4047 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4048 Perl_croak(aTHX_ "Args must match #! line");
4052 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4053 PL_euid == PL_statbuf.st_uid)
4055 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4056 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4057 # endif /* IAMSUID */
4060 PL_euid) { /* oops, we're not the setuid root perl */
4062 * When root runs a setuid script, we do not go through the same
4063 * steps of execing sperl and then perl with fd scripts, but
4064 * simply set up UIDs within the same perl invocation; so do
4065 * not have the same checks (on options, whatever) that we have
4066 * for plain users. No problem really: would have to be a script
4067 * that does not actually work for plain users; and if root is
4068 * foolish and can be persuaded to run such an unsafe script, he
4069 * might run also non-setuid ones, and deserves what he gets.
4071 * Or, we might drop the PL_euid check above (and rely just on
4072 * fdscript to avoid loops), and do the execs
4078 * Pass fd script to suidperl.
4079 * Exec suidperl, substituting fd script for scriptname.
4080 * Pass script name as "subdir" of fd, which perl will grok;
4081 * in fact will use that to distinguish this from "normal"
4082 * usage, see comments above.
4084 PerlIO_rewind(rsfp);
4085 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4086 /* PSz 27 Feb 04 Sanity checks on scriptname */
4087 if ((!scriptname) || (!*scriptname) ) {
4088 Perl_croak(aTHX_ "No setuid script name\n");
4090 if (*scriptname == '-') {
4091 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4092 /* Or we might confuse it with an option when replacing
4093 * name in argument list, below (though we do pointer, not
4094 * string, comparisons).
4097 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4098 if (!PL_origargv[which]) {
4099 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4101 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4102 PerlIO_fileno(rsfp), PL_origargv[which]));
4103 # if defined(HAS_FCNTL) && defined(F_SETFD)
4104 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4107 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4108 (int)PERL_REVISION, (int)PERL_VERSION,
4109 (int)PERL_SUBVERSION), PL_origargv);
4111 # endif /* IAMSUID */
4112 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4115 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4117 * This seems back to front: we try HAS_SETEGID first; if not available
4118 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4119 * in the sense that we only want to set EGID; but are there any machines
4120 * with either of the latter, but not the former? Same with UID, later.
4123 (void)setegid(PL_statbuf.st_gid);
4125 # ifdef HAS_SETREGID
4126 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4128 # ifdef HAS_SETRESGID
4129 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4131 PerlProc_setgid(PL_statbuf.st_gid);
4135 if (PerlProc_getegid() != PL_statbuf.st_gid)
4136 Perl_croak(aTHX_ "Can't do setegid!\n");
4138 if (PL_statbuf.st_mode & S_ISUID) {
4139 if (PL_statbuf.st_uid != PL_euid)
4141 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4143 # ifdef HAS_SETREUID
4144 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4146 # ifdef HAS_SETRESUID
4147 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4149 PerlProc_setuid(PL_statbuf.st_uid);
4153 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4154 Perl_croak(aTHX_ "Can't do seteuid!\n");
4156 else if (PL_uid) { /* oops, mustn't run as root */
4158 (void)seteuid((Uid_t)PL_uid);
4160 # ifdef HAS_SETREUID
4161 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4163 # ifdef HAS_SETRESUID
4164 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4166 PerlProc_setuid((Uid_t)PL_uid);
4170 if (PerlProc_geteuid() != PL_uid)
4171 Perl_croak(aTHX_ "Can't do seteuid!\n");
4174 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4175 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4178 else if (fdscript < 0 || !suidscript)
4179 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4180 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4182 /* PSz 16 Sep 03 Keep neat error message */
4183 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4186 /* We absolutely must clear out any saved ids here, so we */
4187 /* exec the real perl, substituting fd script for scriptname. */
4188 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4190 * It might be thought that using setresgid and/or setresuid (changed to
4191 * set the saved IDs) above might obviate the need to exec, and we could
4192 * go on to "do the perl thing".
4194 * Is there such a thing as "saved GID", and is that set for setuid (but
4195 * not setgid) execution like suidperl? Without exec, it would not be
4196 * cleared for setuid (but not setgid) scripts (or might need a dummy
4199 * We need suidperl to do the exact same argument checking that perl
4200 * does. Thus it cannot be very small; while it could be significantly
4201 * smaller, it is safer (simpler?) to make it essentially the same
4202 * binary as perl (but they are not identical). - Maybe could defer that
4203 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4204 * but prefer to do thorough checks in suidperl itself. Such deferral
4205 * would make suidperl security rely on perl, a design no-no.
4207 * Setuid things should be short and simple, thus easy to understand and
4208 * verify. They should do their "own thing", without influence by
4209 * attackers. It may help if their internal execution flow is fixed,
4210 * regardless of platform: it may be best to exec anyway.
4212 * Suidperl should at least be conceptually simple: a wrapper only,
4213 * never to do any real perl. Maybe we should put
4215 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4217 * into the perly bits.
4219 PerlIO_rewind(rsfp);
4220 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4222 * Keep original arguments: suidperl already has fd script.
4224 # if defined(HAS_FCNTL) && defined(F_SETFD)
4225 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4228 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4229 (int)PERL_REVISION, (int)PERL_VERSION,
4230 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4232 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4233 # endif /* IAMSUID */
4238 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4239 /* Don't even need this function. */
4242 S_validate_suid(pTHX_ PerlIO *rsfp)
4244 PERL_ARGS_ASSERT_VALIDATE_SUID;
4246 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4247 # ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
4248 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4249 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4251 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4254 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4255 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4256 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4257 /* not set-id, must be wrapped */
4260 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4264 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4268 register const char *s2;
4269 #ifdef MACOS_TRADITIONAL
4273 PERL_ARGS_ASSERT_FIND_BEGINNING;
4275 /* skip forward in input to the real script? */
4277 #ifdef MACOS_TRADITIONAL
4278 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4280 while (PL_doextract || gMacPerl_AlwaysExtract) {
4281 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4282 if (!gMacPerl_AlwaysExtract)
4283 Perl_croak(aTHX_ "No Perl script found in input\n");
4285 if (PL_doextract) /* require explicit override ? */
4286 if (!OverrideExtract(PL_origfilename))
4287 Perl_croak(aTHX_ "User aborted script\n");
4289 PL_doextract = FALSE;
4291 /* Pater peccavi, file does not have #! */
4292 PerlIO_rewind(rsfp);
4297 while (PL_doextract) {
4298 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4299 Perl_croak(aTHX_ "No Perl script found in input\n");
4302 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4303 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4304 PL_doextract = FALSE;
4305 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4307 while (*s == ' ' || *s == '\t') s++;
4309 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4310 || s2[-1] == '_') s2--;
4311 if (strnEQ(s2-4,"perl",4))
4312 while ((s = moreswitches(s)))
4315 #ifdef MACOS_TRADITIONAL
4316 /* We are always searching for the #!perl line in MacPerl,
4317 * so if we find it, still keep the line count correct
4318 * by counting lines we already skipped over
4320 for (; maclines > 0 ; maclines--)
4321 PerlIO_ungetc(rsfp, '\n');
4325 /* gMacPerl_AlwaysExtract is false in MPW tool */
4326 } else if (gMacPerl_AlwaysExtract) {
4338 PL_uid = PerlProc_getuid();
4339 PL_euid = PerlProc_geteuid();
4340 PL_gid = PerlProc_getgid();
4341 PL_egid = PerlProc_getegid();
4343 PL_uid |= PL_gid << 16;
4344 PL_euid |= PL_egid << 16;
4346 /* Should not happen: */
4347 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4348 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4351 * Should go by suidscript, not uid!=euid: why disallow
4352 * system("ls") in scripts run from setuid things?
4353 * Or, is this run before we check arguments and set suidscript?
4354 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4355 * (We never have suidscript, can we be sure to have fdscript?)
4356 * Or must then go by UID checks? See comments in forbid_setid also.
4360 /* This is used very early in the lifetime of the program,
4361 * before even the options are parsed, so PL_tainting has
4362 * not been initialized properly. */
4364 Perl_doing_taint(int argc, char *argv[], char *envp[])
4366 #ifndef PERL_IMPLICIT_SYS
4367 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4368 * before we have an interpreter-- and the whole point of this
4369 * function is to be called at such an early stage. If you are on
4370 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4371 * "tainted because running with altered effective ids', you'll
4372 * have to add your own checks somewhere in here. The two most
4373 * known samples of 'implicitness' are Win32 and NetWare, neither
4374 * of which has much of concept of 'uids'. */
4375 int uid = PerlProc_getuid();
4376 int euid = PerlProc_geteuid();
4377 int gid = PerlProc_getgid();
4378 int egid = PerlProc_getegid();
4385 if (uid && (euid != uid || egid != gid))
4387 #endif /* !PERL_IMPLICIT_SYS */
4388 /* This is a really primitive check; environment gets ignored only
4389 * if -T are the first chars together; otherwise one gets
4390 * "Too late" message. */
4391 if ( argc > 1 && argv[1][0] == '-'
4392 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4397 /* Passing the flag as a single char rather than a string is a slight space
4398 optimisation. The only message that isn't /^-.$/ is
4399 "program input from stdin", which is substituted in place of '\0', which
4400 could never be a command line flag. */
4402 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4405 char string[3] = "-x";
4406 const char *message = "program input from stdin";
4413 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4414 if (PL_euid != PL_uid)
4415 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4416 if (PL_egid != PL_gid)
4417 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4418 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4420 * Checks for UID/GID above "wrong": why disallow
4421 * perl -e 'print "Hello\n"'
4422 * from within setuid things?? Simply drop them: replaced by
4423 * fdscript/suidscript and #ifdef IAMSUID checks below.
4425 * This may be too late for command-line switches. Will catch those on
4426 * the #! line, after finding the script name and setting up
4427 * fdscript/suidscript. Note that suidperl does not get around to
4428 * parsing (and checking) the switches on the #! line, but checks that
4429 * the two sets are identical.
4431 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4432 * instead, or would that be "too late"? (We never have suidscript, can
4433 * we be sure to have fdscript?)
4435 * Catch things with suidscript (in descendant of suidperl), even with
4436 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4437 * below; but I am paranoid.
4439 * Also see comments about root running a setuid script, elsewhere.
4442 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4444 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4445 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4446 #endif /* IAMSUID */
4450 Perl_init_debugger(pTHX)
4453 HV * const ostash = PL_curstash;
4455 PL_curstash = PL_debstash;
4456 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4458 AvREAL_off(PL_dbargs);
4459 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4460 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4461 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4462 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4463 sv_setiv(PL_DBsingle, 0);
4464 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4465 sv_setiv(PL_DBtrace, 0);
4466 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4467 sv_setiv(PL_DBsignal, 0);
4468 PL_curstash = ostash;
4471 #ifndef STRESS_REALLOC
4472 #define REASONABLE(size) (size)
4474 #define REASONABLE(size) (1) /* unreasonable */
4478 Perl_init_stacks(pTHX)
4481 /* start with 128-item stack and 8K cxstack */
4482 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4483 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4484 PL_curstackinfo->si_type = PERLSI_MAIN;
4485 PL_curstack = PL_curstackinfo->si_stack;
4486 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4488 PL_stack_base = AvARRAY(PL_curstack);
4489 PL_stack_sp = PL_stack_base;
4490 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4492 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4495 PL_tmps_max = REASONABLE(128);
4497 Newx(PL_markstack,REASONABLE(32),I32);
4498 PL_markstack_ptr = PL_markstack;
4499 PL_markstack_max = PL_markstack + REASONABLE(32);
4503 Newx(PL_scopestack,REASONABLE(32),I32);
4504 PL_scopestack_ix = 0;
4505 PL_scopestack_max = REASONABLE(32);
4507 Newx(PL_savestack,REASONABLE(128),ANY);
4508 PL_savestack_ix = 0;
4509 PL_savestack_max = REASONABLE(128);
4518 while (PL_curstackinfo->si_next)
4519 PL_curstackinfo = PL_curstackinfo->si_next;
4520 while (PL_curstackinfo) {
4521 PERL_SI *p = PL_curstackinfo->si_prev;
4522 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4523 Safefree(PL_curstackinfo->si_cxstack);
4524 Safefree(PL_curstackinfo);
4525 PL_curstackinfo = p;
4527 Safefree(PL_tmps_stack);
4528 Safefree(PL_markstack);
4529 Safefree(PL_scopestack);
4530 Safefree(PL_savestack);
4535 S_init_predump_symbols(pTHX)
4541 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4542 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4543 GvMULTI_on(PL_stdingv);
4544 io = GvIOp(PL_stdingv);
4545 IoTYPE(io) = IoTYPE_RDONLY;
4546 IoIFP(io) = PerlIO_stdin();
4547 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4549 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4551 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4554 IoTYPE(io) = IoTYPE_WRONLY;
4555 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4557 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4559 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4561 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4562 GvMULTI_on(PL_stderrgv);
4563 io = GvIOp(PL_stderrgv);
4564 IoTYPE(io) = IoTYPE_WRONLY;
4565 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4566 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4568 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4570 PL_statname = newSV(0); /* last filename we did stat on */
4572 Safefree(PL_osname);
4573 PL_osname = savepv(OSNAME);
4577 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4581 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4583 argc--,argv++; /* skip name of script */
4584 if (PL_doswitches) {
4585 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4589 if (argv[0][1] == '-' && !argv[0][2]) {
4593 if ((s = strchr(argv[0], '='))) {
4594 const char *const start_name = argv[0] + 1;
4595 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4596 TRUE, SVt_PV)), s + 1);
4599 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4602 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4603 GvMULTI_on(PL_argvgv);
4604 (void)gv_AVadd(PL_argvgv);
4605 av_clear(GvAVn(PL_argvgv));
4606 for (; argc > 0; argc--,argv++) {
4607 SV * const sv = newSVpv(argv[0],0);
4608 av_push(GvAVn(PL_argvgv),sv);
4609 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4610 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4613 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4614 (void)sv_utf8_decode(sv);
4620 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4625 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4627 PL_toptarget = newSV_type(SVt_PVFM);
4628 sv_setpvn(PL_toptarget, "", 0);
4629 PL_bodytarget = newSV_type(SVt_PVFM);
4630 sv_setpvn(PL_bodytarget, "", 0);
4631 PL_formtarget = PL_bodytarget;
4635 init_argv_symbols(argc,argv);
4637 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4638 #ifdef MACOS_TRADITIONAL
4639 /* $0 is not majick on a Mac */
4640 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4642 sv_setpv(GvSV(tmpgv),PL_origfilename);
4643 magicname("0", "0", 1);
4646 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4648 bool env_is_not_environ;
4649 GvMULTI_on(PL_envgv);
4650 hv = GvHVn(PL_envgv);
4651 hv_magic(hv, NULL, PERL_MAGIC_env);
4653 #ifdef USE_ENVIRON_ARRAY
4654 /* Note that if the supplied env parameter is actually a copy
4655 of the global environ then it may now point to free'd memory
4656 if the environment has been modified since. To avoid this
4657 problem we treat env==NULL as meaning 'use the default'
4661 env_is_not_environ = env != environ;
4662 if (env_is_not_environ
4663 # ifdef USE_ITHREADS
4664 && PL_curinterp == aTHX
4673 for (; *env; env++) {
4674 if (!(s = strchr(*env,'=')) || s == *env)
4676 #if defined(MSDOS) && !defined(DJGPP)
4681 sv = newSVpv(s+1, 0);
4682 (void)hv_store(hv, *env, s - *env, sv, 0);
4683 if (env_is_not_environ)
4687 #endif /* USE_ENVIRON_ARRAY */
4688 #endif /* !PERL_MICRO */
4691 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4692 SvREADONLY_off(GvSV(tmpgv));
4693 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4694 SvREADONLY_on(GvSV(tmpgv));
4696 #ifdef THREADS_HAVE_PIDS
4697 PL_ppid = (IV)getppid();
4700 /* touch @F array to prevent spurious warnings 20020415 MJD */
4702 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4707 S_init_perllib(pTHX)
4713 s = PerlEnv_getenv("PERL5LIB");
4715 * It isn't possible to delete an environment variable with
4716 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4717 * case we treat PERL5LIB as undefined if it has a zero-length value.
4719 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4720 if (s && *s != '\0')
4724 incpush(s, TRUE, TRUE, TRUE, FALSE);
4726 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4728 /* Treat PERL5?LIB as a possible search list logical name -- the
4729 * "natural" VMS idiom for a Unix path string. We allow each
4730 * element to be a set of |-separated directories for compatibility.
4734 if (my_trnlnm("PERL5LIB",buf,0))
4735 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4737 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4741 /* Use the ~-expanded versions of APPLLIB (undocumented),
4742 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4745 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4749 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4751 #ifdef MACOS_TRADITIONAL
4754 SV * privdir = newSV(0);
4755 char * macperl = PerlEnv_getenv("MACPERL");
4760 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4761 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4762 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4763 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4764 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4765 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4767 SvREFCNT_dec(privdir);
4770 incpush(":", FALSE, FALSE, TRUE, FALSE);
4773 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4776 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4778 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4782 /* sitearch is always relative to sitelib on Windows for
4783 * DLL-based path intuition to work correctly */
4784 # if !defined(WIN32)
4785 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4791 /* this picks up sitearch as well */
4792 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4794 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4798 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4799 /* Search for version-specific dirs below here */
4800 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4803 #ifdef PERL_VENDORARCH_EXP
4804 /* vendorarch is always relative to vendorlib on Windows for
4805 * DLL-based path intuition to work correctly */
4806 # if !defined(WIN32)
4807 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4811 #ifdef PERL_VENDORLIB_EXP
4813 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4815 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4819 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4820 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4823 #ifdef PERL_OTHERLIBDIRS
4824 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4828 incpush(".", FALSE, FALSE, TRUE, FALSE);
4829 #endif /* MACOS_TRADITIONAL */
4832 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4833 # define PERLLIB_SEP ';'
4836 # define PERLLIB_SEP '|'
4838 # if defined(MACOS_TRADITIONAL)
4839 # define PERLLIB_SEP ','
4841 # define PERLLIB_SEP ':'
4845 #ifndef PERLLIB_MANGLE
4846 # define PERLLIB_MANGLE(s,n) (s)
4849 /* Push a directory onto @INC if it exists.
4850 Generate a new SV if we do this, to save needing to copy the SV we push
4853 S_incpush_if_exists(pTHX_ SV *dir)
4858 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4860 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4861 S_ISDIR(tmpstatbuf.st_mode)) {
4862 av_push(GvAVn(PL_incgv), dir);
4869 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4874 const char *p = dir;
4879 if (addsubdirs || addoldvers) {
4883 /* Break at all separators */
4885 SV *libdir = newSV(0);
4888 /* skip any consecutive separators */
4890 while ( *p == PERLLIB_SEP ) {
4891 /* Uncomment the next line for PATH semantics */
4892 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4897 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4898 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4903 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4904 p = NULL; /* break out */
4906 #ifdef MACOS_TRADITIONAL
4907 if (!strchr(SvPVX(libdir), ':')) {
4910 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4912 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4913 sv_catpvs(libdir, ":");
4916 /* Do the if() outside the #ifdef to avoid warnings about an unused
4919 #ifdef PERL_RELOCATABLE_INC
4921 * Relocatable include entries are marked with a leading .../
4924 * 0: Remove that leading ".../"
4925 * 1: Remove trailing executable name (anything after the last '/')
4926 * from the perl path to give a perl prefix
4928 * While the @INC element starts "../" and the prefix ends with a real
4929 * directory (ie not . or ..) chop that real directory off the prefix
4930 * and the leading "../" from the @INC element. ie a logical "../"
4932 * Finally concatenate the prefix and the remainder of the @INC element
4933 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4934 * generates /usr/local/lib/perl5
4936 const char *libpath = SvPVX(libdir);
4937 STRLEN libpath_len = SvCUR(libdir);
4938 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4940 SV * const caret_X = get_sv("\030", 0);
4941 /* Going to use the SV just as a scratch buffer holding a C
4947 /* $^X is *the* source of taint if tainting is on, hence
4948 SvPOK() won't be true. */
4950 assert(SvPOKp(caret_X));
4951 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4953 /* Firstly take off the leading .../
4954 If all else fail we'll do the paths relative to the current
4956 sv_chop(libdir, libpath + 4);
4957 /* Don't use SvPV as we're intentionally bypassing taining,
4958 mortal copies that the mg_get of tainting creates, and
4959 corruption that seems to come via the save stack.
4960 I guess that the save stack isn't correctly set up yet. */
4961 libpath = SvPVX(libdir);
4962 libpath_len = SvCUR(libdir);
4964 /* This would work more efficiently with memrchr, but as it's
4965 only a GNU extension we'd need to probe for it and
4966 implement our own. Not hard, but maybe not worth it? */
4968 prefix = SvPVX(prefix_sv);
4969 lastslash = strrchr(prefix, '/');
4971 /* First time in with the *lastslash = '\0' we just wipe off
4972 the trailing /perl from (say) /usr/foo/bin/perl
4976 while ((*lastslash = '\0'), /* Do that, come what may. */
4977 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4978 && (lastslash = strrchr(prefix, '/')))) {
4979 if (lastslash[1] == '\0'
4980 || (lastslash[1] == '.'
4981 && (lastslash[2] == '/' /* ends "/." */
4982 || (lastslash[2] == '/'
4983 && lastslash[3] == '/' /* or "/.." */
4985 /* Prefix ends "/" or "/." or "/..", any of which
4986 are fishy, so don't do any more logical cleanup.
4990 /* Remove leading "../" from path */
4993 /* Next iteration round the loop removes the last
4994 directory name from prefix by writing a '\0' in
4995 the while clause. */
4997 /* prefix has been terminated with a '\0' to the correct
4998 length. libpath points somewhere into the libdir SV.
4999 We need to join the 2 with '/' and drop the result into
5001 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5002 SvREFCNT_dec(libdir);
5003 /* And this is the new libdir. */
5006 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5007 /* Need to taint reloccated paths if running set ID */
5008 SvTAINTED_on(libdir);
5011 SvREFCNT_dec(prefix_sv);
5016 * BEFORE pushing libdir onto @INC we may first push version- and
5017 * archname-specific sub-directories.
5019 if (addsubdirs || addoldvers) {
5020 #ifdef PERL_INC_VERSION_LIST
5021 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5022 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5023 const char * const *incver;
5029 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5031 while (unix[len-1] == '/') len--; /* Cosmetic */
5032 sv_usepvn(libdir,unix,len);
5035 PerlIO_printf(Perl_error_log,
5036 "Failed to unixify @INC element \"%s\"\n",
5040 #ifdef MACOS_TRADITIONAL
5041 #define PERL_AV_SUFFIX_FMT ""
5042 #define PERL_ARCH_FMT "%s:"
5043 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5045 #define PERL_AV_SUFFIX_FMT "/"
5046 #define PERL_ARCH_FMT "/%s"
5047 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5049 /* .../version/archname if -d .../version/archname */
5050 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5052 (int)PERL_REVISION, (int)PERL_VERSION,
5053 (int)PERL_SUBVERSION, ARCHNAME);
5054 subdir = S_incpush_if_exists(aTHX_ subdir);
5056 /* .../version if -d .../version */
5057 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5059 (int)PERL_REVISION, (int)PERL_VERSION,
5060 (int)PERL_SUBVERSION);
5061 subdir = S_incpush_if_exists(aTHX_ subdir);
5063 /* .../archname if -d .../archname */
5064 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5065 SVfARG(libdir), ARCHNAME);
5066 subdir = S_incpush_if_exists(aTHX_ subdir);
5070 #ifdef PERL_INC_VERSION_LIST
5072 for (incver = incverlist; *incver; incver++) {
5073 /* .../xxx if -d .../xxx */
5074 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5075 SVfARG(libdir), *incver);
5076 subdir = S_incpush_if_exists(aTHX_ subdir);
5082 /* finally push this lib directory on the end of @INC */
5083 av_push(GvAVn(PL_incgv), libdir);
5086 assert (SvREFCNT(subdir) == 1);
5087 SvREFCNT_dec(subdir);
5093 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5097 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5103 PERL_ARGS_ASSERT_CALL_LIST;
5105 while (av_len(paramList) >= 0) {
5106 cv = (CV*)av_shift(paramList);
5108 if (paramList == PL_beginav) {
5109 /* save PL_beginav for compiler */
5110 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5112 else if (paramList == PL_checkav) {
5113 /* save PL_checkav for compiler */
5114 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5116 else if (paramList == PL_unitcheckav) {
5117 /* save PL_unitcheckav for compiler */
5118 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5129 PL_madskills |= 16384;
5134 PL_madskills &= ~16384;
5137 (void)SvPV_const(atsv, len);
5139 PL_curcop = &PL_compiling;
5140 CopLINE_set(PL_curcop, oldline);
5141 if (paramList == PL_beginav)
5142 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5144 Perl_sv_catpvf(aTHX_ atsv,
5145 "%s failed--call queue aborted",
5146 paramList == PL_checkav ? "CHECK"
5147 : paramList == PL_initav ? "INIT"
5148 : paramList == PL_unitcheckav ? "UNITCHECK"
5150 while (PL_scopestack_ix > oldscope)
5153 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5160 /* my_exit() was called */
5161 while (PL_scopestack_ix > oldscope)
5164 PL_curstash = PL_defstash;
5165 PL_curcop = &PL_compiling;
5166 CopLINE_set(PL_curcop, oldline);
5168 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5169 if (paramList == PL_beginav)
5170 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5172 Perl_croak(aTHX_ "%s failed--call queue aborted",
5173 paramList == PL_checkav ? "CHECK"
5174 : paramList == PL_initav ? "INIT"
5175 : paramList == PL_unitcheckav ? "UNITCHECK"
5182 PL_curcop = &PL_compiling;
5183 CopLINE_set(PL_curcop, oldline);
5186 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5195 Perl_my_exit(pTHX_ U32 status)
5206 STATUS_EXIT_SET(status);
5213 Perl_my_failure_exit(pTHX)
5217 /* We have been called to fall on our sword. The desired exit code
5218 * should be already set in STATUS_UNIX, but could be shifted over
5219 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5222 * If an error code has not been set, then force the issue.
5224 if (MY_POSIX_EXIT) {
5226 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5227 * the exit code when there isn't an error.
5230 if (STATUS_UNIX == 0)
5231 STATUS_UNIX_EXIT_SET(255);
5233 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5235 /* The exit code could have been set by $? or vmsish which
5236 * means that it may not be fatal. So convert
5237 * success/warning codes to fatal.
5239 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5240 STATUS_UNIX_EXIT_SET(255);
5244 /* Traditionally Perl on VMS always expects a Fatal Error. */
5245 if (vaxc$errno & 1) {
5247 /* So force success status to failure */
5248 if (STATUS_NATIVE & 1)
5253 STATUS_UNIX = EINTR; /* In case something cares */
5258 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5260 /* Encode the severity code */
5261 severity = STATUS_NATIVE & STS$M_SEVERITY;
5262 STATUS_UNIX = (severity ? severity : 1) << 8;
5264 /* Perl expects this to be a fatal error */
5265 if (severity != STS$K_SEVERE)
5274 STATUS_UNIX_SET(errno);
5276 exitstatus = STATUS_UNIX >> 8;
5277 if (exitstatus & 255)
5278 STATUS_UNIX_SET(exitstatus);
5280 STATUS_UNIX_SET(255);
5287 S_my_exit_jump(pTHX)
5292 SvREFCNT_dec(PL_e_script);
5296 POPSTACK_TO(PL_mainstack);
5304 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5307 const char * const p = SvPVX_const(PL_e_script);
5308 const char *nl = strchr(p, '\n');
5310 PERL_UNUSED_ARG(idx);
5311 PERL_UNUSED_ARG(maxlen);
5313 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5315 filter_del(read_e_script);
5318 sv_catpvn(buf_sv, p, nl-p);
5319 sv_chop(PL_e_script, nl);
5325 * c-indentation-style: bsd
5327 * indent-tabs-mode: t
5330 * ex: set ts=8 sts=4 sw=4 noet: