3 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * "A ship then new they built for him/of mithril and of elven glass" --Bilbo
15 /* This file contains the top-level functions that are used to create, use
16 * and destroy a perl interpreter, plus the functions used by XS code to
17 * call back into perl. Note that it does not contain the actual main()
18 * function of the interpreter; that can be found in perlmain.c
23 * Be proud that perl(1) may proclaim:
24 * Setuid Perl scripts are safer than C programs ...
25 * Do not abandon (deprecate) suidperl. Do not advocate C wrappers.
27 * The flow was: perl starts, notices script is suid, execs suidperl with same
28 * arguments; suidperl opens script, checks many things, sets itself with
29 * right UID, execs perl with similar arguments but with script pre-opened on
30 * /dev/fd/xxx; perl checks script is as should be and does work. This was
31 * insecure: see perlsec(1) for many problems with this approach.
33 * The "correct" flow should be: perl starts, opens script and notices it is
34 * suid, checks many things, execs suidperl with similar arguments but with
35 * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are
36 * same, checks arguments match #! line, sets itself with right UID, execs
37 * perl with same arguments; perl checks many things and does work.
39 * (Opening the script in perl instead of suidperl, we "lose" scripts that
40 * are readable to the target UID but not to the invoker. Where did
41 * unreadable scripts work anyway?)
43 * For now, suidperl and perl are pretty much the same large and cumbersome
44 * program, so suidperl can check its argument list (see comments elsewhere).
47 * Original bug report:
48 * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218
49 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511
50 * Comments and discussion with Debian:
51 * http://bugs.debian.org/203426
52 * http://bugs.debian.org/220486
53 * Debian Security Advisory DSA 431-1 (does not fully fix problem):
54 * http://www.debian.org/security/2004/dsa-431
56 * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618
57 * Previous versions of this patch sent to perl5-porters:
58 * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html
59 * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html
60 * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html
61 * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html
63 Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/
64 School of Mathematics and Statistics University of Sydney 2006 Australia
68 * Use truthful, neat, specific error messages.
69 * Cannot always hide the truth; security must not depend on doing so.
73 * Use global(?), thread-local fdscript for easier checks.
74 * (I do not understand how we could possibly get a thread race:
75 * do not all threads go through the same initialization? Or in
76 * fact, are not threads started only after we get the script and
77 * so know what to do? Oh well, make things super-safe...)
81 #define PERL_IN_PERL_C
83 #include "patchlevel.h" /* for local_patches */
87 char *nw_get_sitelib(const char *pl);
90 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
95 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
97 # include <sys/wait.h>
100 # include <sys/uio.h>
105 char control[CMSG_SPACE(sizeof(int))];
122 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
123 char *getenv (char *); /* Usually in <stdlib.h> */
126 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
134 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
140 #define CALL_BODY_EVAL(myop) \
141 if (PL_op == (myop)) \
142 PL_op = Perl_pp_entereval(aTHX); \
146 #define CALL_BODY_SUB(myop) \
147 if (PL_op == (myop)) \
148 PL_op = Perl_pp_entersub(aTHX); \
152 #define CALL_LIST_BODY(cv) \
153 PUSHMARK(PL_stack_sp); \
154 call_sv((SV*)(cv), G_EVAL|G_DISCARD);
157 S_init_tls_and_interp(PerlInterpreter *my_perl)
161 PERL_SET_INTERP(my_perl);
162 #if defined(USE_ITHREADS)
165 PERL_SET_THX(my_perl);
168 MUTEX_INIT(&PL_dollarzero_mutex);
170 #ifdef PERL_IMPLICIT_CONTEXT
171 MUTEX_INIT(&PL_my_ctx_mutex);
174 #if defined(USE_ITHREADS)
177 /* This always happens for non-ithreads */
180 PERL_SET_THX(my_perl);
185 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
188 Perl_sys_init(int* argc, char*** argv)
191 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
192 PERL_UNUSED_ARG(argv);
193 PERL_SYS_INIT_BODY(argc, argv);
197 Perl_sys_init3(int* argc, char*** argv, char*** env)
200 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
201 PERL_UNUSED_ARG(argv);
202 PERL_UNUSED_ARG(env);
203 PERL_SYS_INIT3_BODY(argc, argv, env);
210 if (!PL_veto_cleanup) {
211 PERL_SYS_TERM_BODY();
216 #ifdef PERL_IMPLICIT_SYS
218 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
219 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
220 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
221 struct IPerlDir* ipD, struct IPerlSock* ipS,
222 struct IPerlProc* ipP)
224 PerlInterpreter *my_perl;
225 /* Newx() needs interpreter, so call malloc() instead */
226 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
227 S_init_tls_and_interp(my_perl);
228 Zero(my_perl, 1, PerlInterpreter);
238 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
245 =head1 Embedding Functions
247 =for apidoc perl_alloc
249 Allocates a new Perl interpreter. See L<perlembed>.
257 PerlInterpreter *my_perl;
259 /* Newx() needs interpreter, so call malloc() instead */
260 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
262 S_init_tls_and_interp(my_perl);
263 #ifndef PERL_TRACK_MEMPOOL
264 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
266 Zero(my_perl, 1, PerlInterpreter);
267 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
271 #endif /* PERL_IMPLICIT_SYS */
274 =for apidoc perl_construct
276 Initializes a new Perl interpreter. See L<perlembed>.
282 perl_construct(pTHXx)
285 PERL_UNUSED_ARG(my_perl);
288 PL_perl_destruct_level = 1;
290 if (PL_perl_destruct_level > 0)
293 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
295 /* set read-only and try to insure than we wont see REFCNT==0
298 SvREADONLY_on(&PL_sv_undef);
299 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
301 sv_setpv(&PL_sv_no,PL_No);
302 /* value lookup in void context - happens to have the side effect
303 of caching the numeric forms. */
306 SvREADONLY_on(&PL_sv_no);
307 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
309 sv_setpv(&PL_sv_yes,PL_Yes);
312 SvREADONLY_on(&PL_sv_yes);
313 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
315 SvREADONLY_on(&PL_sv_placeholder);
316 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
318 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
319 #ifdef PERL_USES_PL_PIDSTATUS
320 PL_pidstatus = newHV();
323 PL_rs = newSVpvs("\n");
333 SET_NUMERIC_STANDARD();
335 #if defined(LOCAL_PATCH_COUNT)
336 PL_localpatches = local_patches; /* For possible -v */
339 #ifdef HAVE_INTERP_INTERN
343 PerlIO_init(aTHX); /* Hook to IO system */
345 PL_fdpid = newAV(); /* for remembering popen pids by fd */
346 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
347 PL_errors = newSVpvs("");
348 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
349 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
350 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
352 /* First entry is an array of empty elements */
353 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
354 PL_regex_pad = AvARRAY(PL_regex_padav);
356 #ifdef USE_REENTRANT_API
357 Perl_reentrant_init(aTHX);
360 /* Note that strtab is a rather special HV. Assumptions are made
361 about not iterating on it, and not adding tie magic to it.
362 It is properly deallocated in perl_destruct() */
365 HvSHAREKEYS_off(PL_strtab); /* mandatory */
366 hv_ksplit(PL_strtab, 512);
368 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
369 _dyld_lookup_and_bind
370 ("__environ", (unsigned long *) &environ_pointer, NULL);
374 # ifdef USE_ENVIRON_ARRAY
375 PL_origenviron = environ;
379 /* Use sysconf(_SC_CLK_TCK) if available, if not
380 * available or if the sysconf() fails, use the HZ.
381 * BeOS has those, but returns the wrong value.
382 * The HZ if not originally defined has been by now
383 * been defined as CLK_TCK, if available. */
384 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
385 PL_clocktick = sysconf(_SC_CLK_TCK);
386 if (PL_clocktick <= 0)
390 PL_stashcache = newHV();
392 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
393 (int)PERL_VERSION, (int)PERL_SUBVERSION);
396 if (!PL_mmap_page_size) {
397 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
399 SETERRNO(0, SS_NORMAL);
401 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
403 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
405 if ((long) PL_mmap_page_size < 0) {
407 SV * const error = ERRSV;
408 SvUPGRADE(error, SVt_PV);
409 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
412 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
416 # ifdef HAS_GETPAGESIZE
417 PL_mmap_page_size = getpagesize();
419 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
420 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
424 if (PL_mmap_page_size <= 0)
425 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
426 (IV) PL_mmap_page_size);
428 #endif /* HAS_MMAP */
430 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
431 PL_timesbase.tms_utime = 0;
432 PL_timesbase.tms_stime = 0;
433 PL_timesbase.tms_cutime = 0;
434 PL_timesbase.tms_cstime = 0;
441 =for apidoc nothreadhook
443 Stub that provides thread hook for perl_destruct when there are
450 Perl_nothreadhook(pTHX)
456 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
458 Perl_dump_sv_child(pTHX_ SV *sv)
461 const int sock = PL_dumper_fd;
462 const int debug_fd = PerlIO_fileno(Perl_debug_log);
463 union control_un control;
466 struct cmsghdr *cmptr;
468 unsigned char buffer[256];
470 if(sock == -1 || debug_fd == -1)
473 PerlIO_flush(Perl_debug_log);
475 /* All these shenanigans are to pass a file descriptor over to our child for
476 it to dump out to. We can't let it hold open the file descriptor when it
477 forks, as the file descriptor it will dump to can turn out to be one end
478 of pipe that some other process will wait on for EOF. (So as it would
479 be open, the wait would be forever.) */
481 msg.msg_control = control.control;
482 msg.msg_controllen = sizeof(control.control);
483 /* We're a connected socket so we don't need a destination */
489 cmptr = CMSG_FIRSTHDR(&msg);
490 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
491 cmptr->cmsg_level = SOL_SOCKET;
492 cmptr->cmsg_type = SCM_RIGHTS;
493 *((int *)CMSG_DATA(cmptr)) = 1;
495 vec[0].iov_base = (void*)&sv;
496 vec[0].iov_len = sizeof(sv);
497 got = sendmsg(sock, &msg, 0);
500 perror("Debug leaking scalars parent sendmsg failed");
503 if(got < sizeof(sv)) {
504 perror("Debug leaking scalars parent short sendmsg");
508 /* Return protocol is
510 unsigned char: length of location string (0 for empty)
511 unsigned char*: string (not terminated)
513 vec[0].iov_base = (void*)&returned_errno;
514 vec[0].iov_len = sizeof(returned_errno);
515 vec[1].iov_base = buffer;
518 got = readv(sock, vec, 2);
521 perror("Debug leaking scalars parent read failed");
522 PerlIO_flush(PerlIO_stderr());
525 if(got < sizeof(returned_errno) + 1) {
526 perror("Debug leaking scalars parent short read");
527 PerlIO_flush(PerlIO_stderr());
532 got = read(sock, buffer + 1, *buffer);
534 perror("Debug leaking scalars parent read 2 failed");
535 PerlIO_flush(PerlIO_stderr());
540 perror("Debug leaking scalars parent short read 2");
541 PerlIO_flush(PerlIO_stderr());
546 if (returned_errno || *buffer) {
547 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
548 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
549 returned_errno, strerror(returned_errno));
555 =for apidoc perl_destruct
557 Shuts down a Perl interpreter. See L<perlembed>.
566 VOL signed char destruct_level; /* see possible values in intrpvar.h */
568 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
572 PERL_UNUSED_ARG(my_perl);
574 /* wait for all pseudo-forked children to finish */
575 PERL_WAIT_FOR_CHILDREN;
577 destruct_level = PL_perl_destruct_level;
580 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
582 const int i = atoi(s);
583 if (destruct_level < i)
589 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
595 if (PL_endav && !PL_minus_c)
596 call_list(PL_scopestack_ix, PL_endav);
602 /* Need to flush since END blocks can produce output */
605 if (CALL_FPTR(PL_threadhook)(aTHX)) {
606 /* Threads hook has vetoed further cleanup */
607 PL_veto_cleanup = TRUE;
611 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
612 if (destruct_level != 0) {
613 /* Fork here to create a child. Our child's job is to preserve the
614 state of scalars prior to destruction, so that we can instruct it
615 to dump any scalars that we later find have leaked.
616 There's no subtlety in this code - it assumes POSIX, and it doesn't
620 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
621 perror("Debug leaking scalars socketpair failed");
627 perror("Debug leaking scalars fork failed");
631 /* We are the child */
632 const int sock = fd[1];
633 const int debug_fd = PerlIO_fileno(Perl_debug_log);
636 /* Our success message is an integer 0, and a char 0 */
637 static const char success[sizeof(int) + 1];
641 /* We need to close all other file descriptors otherwise we end up
642 with interesting hangs, where the parent closes its end of a
643 pipe, and sits waiting for (another) child to terminate. Only
644 that child never terminates, because it never gets EOF, because
645 we also have the far end of the pipe open. We even need to
646 close the debugging fd, because sometimes it happens to be one
647 end of a pipe, and a process is waiting on the other end for
648 EOF. Normally it would be closed at some point earlier in
649 destruction, but if we happen to cause the pipe to remain open,
650 EOF never occurs, and we get an infinite hang. Hence all the
651 games to pass in a file descriptor if it's actually needed. */
653 f = sysconf(_SC_OPEN_MAX);
655 where = "sysconf failed";
666 union control_un control;
669 struct cmsghdr *cmptr;
673 msg.msg_control = control.control;
674 msg.msg_controllen = sizeof(control.control);
675 /* We're a connected socket so we don't need a source */
679 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
681 vec[0].iov_base = (void*)⌖
682 vec[0].iov_len = sizeof(target);
684 got = recvmsg(sock, &msg, 0);
689 where = "recv failed";
692 if(got < sizeof(target)) {
693 where = "short recv";
697 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
701 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
702 where = "wrong cmsg_len";
705 if(cmptr->cmsg_level != SOL_SOCKET) {
706 where = "wrong cmsg_level";
709 if(cmptr->cmsg_type != SCM_RIGHTS) {
710 where = "wrong cmsg_type";
714 got_fd = *(int*)CMSG_DATA(cmptr);
715 /* For our last little bit of trickery, put the file descriptor
716 back into Perl_debug_log, as if we never actually closed it
718 if(got_fd != debug_fd) {
719 if (dup2(got_fd, debug_fd) == -1) {
726 PerlIO_flush(Perl_debug_log);
728 got = write(sock, &success, sizeof(success));
731 where = "write failed";
734 if(got < sizeof(success)) {
735 where = "short write";
742 int send_errno = errno;
743 unsigned char length = (unsigned char) strlen(where);
744 struct iovec failure[3] = {
745 {(void*)&send_errno, sizeof(send_errno)},
747 {(void*)where, length}
749 int got = writev(sock, failure, 3);
750 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
751 in the parent if we try to read from the socketpair after the
752 child has exited, even if there was data to read.
753 So sleep a bit to give the parent a fighting chance of
756 _exit((got == -1) ? errno : 0);
760 PL_dumper_fd = fd[0];
765 /* We must account for everything. */
767 /* Destroy the main CV and syntax tree */
768 /* Do this now, because destroying ops can cause new SVs to be generated
769 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
770 PL_curcop to point to a valid op from which the filename structure
772 PL_curcop = &PL_compiling;
774 /* ensure comppad/curpad to refer to main's pad */
775 if (CvPADLIST(PL_main_cv)) {
776 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
778 op_free(PL_main_root);
781 PL_main_start = NULL;
782 SvREFCNT_dec(PL_main_cv);
786 /* Tell PerlIO we are about to tear things apart in case
787 we have layers which are using resources that should
791 PerlIO_destruct(aTHX);
793 if (PL_sv_objcount) {
795 * Try to destruct global references. We do this first so that the
796 * destructors and destructees still exist. Some sv's might remain.
797 * Non-referenced objects are on their own.
801 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
802 PL_defoutgv = NULL; /* may have been freed */
805 /* unhook hooks which will soon be, or use, destroyed data */
806 SvREFCNT_dec(PL_warnhook);
808 SvREFCNT_dec(PL_diehook);
811 /* call exit list functions */
812 while (PL_exitlistlen-- > 0)
813 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
815 Safefree(PL_exitlist);
820 /* jettison our possibly duplicated environment */
821 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
822 * so we certainly shouldn't free it here
825 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
826 if (environ != PL_origenviron && !PL_use_safe_putenv
828 /* only main thread can free environ[0] contents */
829 && PL_curinterp == aTHX
835 for (i = 0; environ[i]; i++)
836 safesysfree(environ[i]);
838 /* Must use safesysfree() when working with environ. */
839 safesysfree(environ);
841 environ = PL_origenviron;
844 #endif /* !PERL_MICRO */
846 if (destruct_level == 0) {
848 DEBUG_P(debprofdump());
850 #if defined(PERLIO_LAYERS)
851 /* No more IO - including error messages ! */
852 PerlIO_cleanup(aTHX);
855 CopFILE_free(&PL_compiling);
856 CopSTASH_free(&PL_compiling);
858 /* The exit() function will do everything that needs doing. */
862 /* reset so print() ends up where we expect */
866 /* the syntax tree is shared between clones
867 * so op_free(PL_main_root) only ReREFCNT_dec's
868 * REGEXPs in the parent interpreter
869 * we need to manually ReREFCNT_dec for the clones
872 I32 i = AvFILLp(PL_regex_padav) + 1;
873 SV * const * const ary = AvARRAY(PL_regex_padav);
876 SV * const resv = ary[--i];
878 if (SvFLAGS(resv) & SVf_BREAK) {
879 /* this is PL_reg_curpm, already freed
880 * flag is set in regexec.c:S_regtry
882 SvFLAGS(resv) &= ~SVf_BREAK;
884 else if(SvREPADTMP(resv)) {
885 SvREPADTMP_off(resv);
887 else if(SvIOKp(resv)) {
888 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
893 SvREFCNT_dec(PL_regex_padav);
894 PL_regex_padav = NULL;
898 SvREFCNT_dec((SV*) PL_stashcache);
899 PL_stashcache = NULL;
901 /* loosen bonds of global variables */
903 /* XXX can PL_parser still be non-null here? */
904 if(PL_parser && PL_parser->rsfp) {
905 (void)PerlIO_close(PL_parser->rsfp);
906 PL_parser->rsfp = NULL;
910 Safefree(PL_splitstr);
915 PL_preprocess = FALSE;
921 PL_doswitches = FALSE;
922 PL_dowarn = G_WARN_OFF;
923 PL_doextract = FALSE;
924 PL_sawampersand = FALSE; /* must save all match strings */
927 Safefree(PL_inplace);
929 SvREFCNT_dec(PL_patchlevel);
932 SvREFCNT_dec(PL_e_script);
938 /* magical thingies */
940 SvREFCNT_dec(PL_ofs_sv); /* $, */
943 SvREFCNT_dec(PL_ors_sv); /* $\ */
946 SvREFCNT_dec(PL_rs); /* $/ */
949 Safefree(PL_osname); /* $^O */
952 SvREFCNT_dec(PL_statname);
956 /* defgv, aka *_ should be taken care of elsewhere */
958 /* clean up after study() */
959 SvREFCNT_dec(PL_lastscream);
960 PL_lastscream = NULL;
961 Safefree(PL_screamfirst);
963 Safefree(PL_screamnext);
967 Safefree(PL_efloatbuf);
971 /* startup and shutdown function lists */
972 SvREFCNT_dec(PL_beginav);
973 SvREFCNT_dec(PL_beginav_save);
974 SvREFCNT_dec(PL_endav);
975 SvREFCNT_dec(PL_checkav);
976 SvREFCNT_dec(PL_checkav_save);
977 SvREFCNT_dec(PL_unitcheckav);
978 SvREFCNT_dec(PL_unitcheckav_save);
979 SvREFCNT_dec(PL_initav);
981 PL_beginav_save = NULL;
984 PL_checkav_save = NULL;
985 PL_unitcheckav = NULL;
986 PL_unitcheckav_save = NULL;
989 /* shortcuts just get cleared */
998 PL_last_in_gv = NULL;
1010 SvREFCNT_dec(PL_argvout_stack);
1011 PL_argvout_stack = NULL;
1013 SvREFCNT_dec(PL_modglobal);
1014 PL_modglobal = NULL;
1015 SvREFCNT_dec(PL_preambleav);
1016 PL_preambleav = NULL;
1017 SvREFCNT_dec(PL_subname);
1019 #ifdef PERL_USES_PL_PIDSTATUS
1020 SvREFCNT_dec(PL_pidstatus);
1021 PL_pidstatus = NULL;
1023 SvREFCNT_dec(PL_toptarget);
1024 PL_toptarget = NULL;
1025 SvREFCNT_dec(PL_bodytarget);
1026 PL_bodytarget = NULL;
1027 PL_formtarget = NULL;
1029 /* free locale stuff */
1030 #ifdef USE_LOCALE_COLLATE
1031 Safefree(PL_collation_name);
1032 PL_collation_name = NULL;
1035 #ifdef USE_LOCALE_NUMERIC
1036 Safefree(PL_numeric_name);
1037 PL_numeric_name = NULL;
1038 SvREFCNT_dec(PL_numeric_radix_sv);
1039 PL_numeric_radix_sv = NULL;
1042 /* clear utf8 character classes */
1043 SvREFCNT_dec(PL_utf8_alnum);
1044 SvREFCNT_dec(PL_utf8_alnumc);
1045 SvREFCNT_dec(PL_utf8_ascii);
1046 SvREFCNT_dec(PL_utf8_alpha);
1047 SvREFCNT_dec(PL_utf8_space);
1048 SvREFCNT_dec(PL_utf8_cntrl);
1049 SvREFCNT_dec(PL_utf8_graph);
1050 SvREFCNT_dec(PL_utf8_digit);
1051 SvREFCNT_dec(PL_utf8_upper);
1052 SvREFCNT_dec(PL_utf8_lower);
1053 SvREFCNT_dec(PL_utf8_print);
1054 SvREFCNT_dec(PL_utf8_punct);
1055 SvREFCNT_dec(PL_utf8_xdigit);
1056 SvREFCNT_dec(PL_utf8_mark);
1057 SvREFCNT_dec(PL_utf8_toupper);
1058 SvREFCNT_dec(PL_utf8_totitle);
1059 SvREFCNT_dec(PL_utf8_tolower);
1060 SvREFCNT_dec(PL_utf8_tofold);
1061 SvREFCNT_dec(PL_utf8_idstart);
1062 SvREFCNT_dec(PL_utf8_idcont);
1063 PL_utf8_alnum = NULL;
1064 PL_utf8_alnumc = NULL;
1065 PL_utf8_ascii = NULL;
1066 PL_utf8_alpha = NULL;
1067 PL_utf8_space = NULL;
1068 PL_utf8_cntrl = NULL;
1069 PL_utf8_graph = NULL;
1070 PL_utf8_digit = NULL;
1071 PL_utf8_upper = NULL;
1072 PL_utf8_lower = NULL;
1073 PL_utf8_print = NULL;
1074 PL_utf8_punct = NULL;
1075 PL_utf8_xdigit = NULL;
1076 PL_utf8_mark = NULL;
1077 PL_utf8_toupper = NULL;
1078 PL_utf8_totitle = NULL;
1079 PL_utf8_tolower = NULL;
1080 PL_utf8_tofold = NULL;
1081 PL_utf8_idstart = NULL;
1082 PL_utf8_idcont = NULL;
1084 if (!specialWARN(PL_compiling.cop_warnings))
1085 PerlMemShared_free(PL_compiling.cop_warnings);
1086 PL_compiling.cop_warnings = NULL;
1087 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1088 PL_compiling.cop_hints_hash = NULL;
1089 CopFILE_free(&PL_compiling);
1090 CopSTASH_free(&PL_compiling);
1092 /* Prepare to destruct main symbol table. */
1097 SvREFCNT_dec(PL_curstname);
1098 PL_curstname = NULL;
1100 /* clear queued errors */
1101 SvREFCNT_dec(PL_errors);
1104 SvREFCNT_dec(PL_isarev);
1107 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1108 if (PL_scopestack_ix != 0)
1109 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1110 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1111 (long)PL_scopestack_ix);
1112 if (PL_savestack_ix != 0)
1113 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1114 "Unbalanced saves: %ld more saves than restores\n",
1115 (long)PL_savestack_ix);
1116 if (PL_tmps_floor != -1)
1117 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1118 (long)PL_tmps_floor + 1);
1119 if (cxstack_ix != -1)
1120 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1121 (long)cxstack_ix + 1);
1124 /* Now absolutely destruct everything, somehow or other, loops or no. */
1125 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1126 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1128 /* the 2 is for PL_fdpid and PL_strtab */
1129 while (PL_sv_count > 2 && sv_clean_all())
1132 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1133 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1134 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1135 SvFLAGS(PL_strtab) |= SVt_PVHV;
1137 AvREAL_off(PL_fdpid); /* no surviving entries */
1138 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1141 #ifdef HAVE_INTERP_INTERN
1145 /* Destruct the global string table. */
1147 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1148 * so that sv_free() won't fail on them.
1149 * Now that the global string table is using a single hunk of memory
1150 * for both HE and HEK, we either need to explicitly unshare it the
1151 * correct way, or actually free things here.
1154 const I32 max = HvMAX(PL_strtab);
1155 HE * const * const array = HvARRAY(PL_strtab);
1156 HE *hent = array[0];
1159 if (hent && ckWARN_d(WARN_INTERNAL)) {
1160 HE * const next = HeNEXT(hent);
1161 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1162 "Unbalanced string table refcount: (%ld) for \"%s\"",
1163 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1170 hent = array[riter];
1175 HvARRAY(PL_strtab) = 0;
1176 HvTOTALKEYS(PL_strtab) = 0;
1177 HvFILL(PL_strtab) = 0;
1179 SvREFCNT_dec(PL_strtab);
1182 /* free the pointer tables used for cloning */
1183 ptr_table_free(PL_ptr_table);
1184 PL_ptr_table = (PTR_TBL_t*)NULL;
1187 /* free special SVs */
1189 SvREFCNT(&PL_sv_yes) = 0;
1190 sv_clear(&PL_sv_yes);
1191 SvANY(&PL_sv_yes) = NULL;
1192 SvFLAGS(&PL_sv_yes) = 0;
1194 SvREFCNT(&PL_sv_no) = 0;
1195 sv_clear(&PL_sv_no);
1196 SvANY(&PL_sv_no) = NULL;
1197 SvFLAGS(&PL_sv_no) = 0;
1201 for (i=0; i<=2; i++) {
1202 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1203 sv_clear(PERL_DEBUG_PAD(i));
1204 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1205 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1209 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1210 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1212 #ifdef DEBUG_LEAKING_SCALARS
1213 if (PL_sv_count != 0) {
1218 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1219 svend = &sva[SvREFCNT(sva)];
1220 for (sv = sva + 1; sv < svend; ++sv) {
1221 if (SvTYPE(sv) != SVTYPEMASK) {
1222 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1224 " refcnt=%"UVuf pTHX__FORMAT "\n"
1225 "\tallocated at %s:%d %s %s%s\n",
1226 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1227 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1229 sv->sv_debug_inpad ? "for" : "by",
1230 sv->sv_debug_optype ?
1231 PL_op_name[sv->sv_debug_optype]: "(none)",
1232 sv->sv_debug_cloned ? " (cloned)" : ""
1234 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1235 Perl_dump_sv_child(aTHX_ sv);
1241 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1245 /* Wait for up to 4 seconds for child to terminate.
1246 This seems to be the least effort way of timing out on reaping
1248 struct timeval waitfor = {4, 0};
1249 int sock = PL_dumper_fd;
1253 FD_SET(sock, &rset);
1254 select(sock + 1, &rset, NULL, NULL, &waitfor);
1255 waitpid(child, &status, WNOHANG);
1262 #ifdef PERL_DEBUG_READONLY_OPS
1268 #if defined(PERLIO_LAYERS)
1269 /* No more IO - including error messages ! */
1270 PerlIO_cleanup(aTHX);
1273 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1274 as currently layers use it rather than NULL as a marker
1275 for no arg - and will try and SvREFCNT_dec it.
1277 SvREFCNT(&PL_sv_undef) = 0;
1278 SvREADONLY_off(&PL_sv_undef);
1280 Safefree(PL_origfilename);
1281 PL_origfilename = NULL;
1282 Safefree(PL_reg_start_tmp);
1283 PL_reg_start_tmp = (char**)NULL;
1284 PL_reg_start_tmpl = 0;
1285 Safefree(PL_reg_curpm);
1286 Safefree(PL_reg_poscache);
1287 free_tied_hv_pool();
1288 Safefree(PL_op_mask);
1289 Safefree(PL_psig_ptr);
1290 PL_psig_ptr = (SV**)NULL;
1291 Safefree(PL_psig_name);
1292 PL_psig_name = (SV**)NULL;
1293 Safefree(PL_bitcount);
1295 Safefree(PL_psig_pend);
1296 PL_psig_pend = (int*)NULL;
1299 PL_tainting = FALSE;
1300 PL_taint_warn = FALSE;
1301 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1304 DEBUG_P(debprofdump());
1306 #ifdef USE_REENTRANT_API
1307 Perl_reentrant_free(aTHX);
1312 while (PL_regmatch_slab) {
1313 regmatch_slab *s = PL_regmatch_slab;
1314 PL_regmatch_slab = PL_regmatch_slab->next;
1318 /* As the absolutely last thing, free the non-arena SV for mess() */
1321 /* we know that type == SVt_PVMG */
1323 /* it could have accumulated taint magic */
1326 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1327 moremagic = mg->mg_moremagic;
1328 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1330 Safefree(mg->mg_ptr);
1334 /* we know that type >= SVt_PV */
1335 SvPV_free(PL_mess_sv);
1336 Safefree(SvANY(PL_mess_sv));
1337 Safefree(PL_mess_sv);
1344 =for apidoc perl_free
1346 Releases a Perl interpreter. See L<perlembed>.
1356 if (PL_veto_cleanup)
1359 #ifdef PERL_TRACK_MEMPOOL
1362 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1363 * value as we're probably hunting memory leaks then
1365 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1366 if (!s || atoi(s) == 0) {
1367 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1368 thread at thread exit. */
1369 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1370 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1375 #if defined(WIN32) || defined(NETWARE)
1376 # if defined(PERL_IMPLICIT_SYS)
1379 void *host = nw_internal_host;
1381 void *host = w32_internal_host;
1383 PerlMem_free(aTHXx);
1385 nw_delete_internal_host(host);
1387 win32_delete_internal_host(host);
1391 PerlMem_free(aTHXx);
1394 PerlMem_free(aTHXx);
1398 #if defined(USE_ITHREADS)
1399 /* provide destructors to clean up the thread key when libperl is unloaded */
1400 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1402 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1403 #pragma fini "perl_fini"
1404 #elif defined(__sun) && !defined(__GNUC__)
1405 #pragma fini (perl_fini)
1409 #if defined(__GNUC__)
1410 __attribute__((destructor))
1415 if (PL_curinterp && !PL_veto_cleanup)
1420 #endif /* THREADS */
1423 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1426 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1427 PL_exitlist[PL_exitlistlen].fn = fn;
1428 PL_exitlist[PL_exitlistlen].ptr = ptr;
1432 #ifdef HAS_PROCSELFEXE
1433 /* This is a function so that we don't hold on to MAXPATHLEN
1434 bytes of stack longer than necessary
1437 S_procself_val(pTHX_ SV *sv, const char *arg0)
1439 char buf[MAXPATHLEN];
1440 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1442 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1443 includes a spurious NUL which will cause $^X to fail in system
1444 or backticks (this will prevent extensions from being built and
1445 many tests from working). readlink is not meant to add a NUL.
1446 Normal readlink works fine.
1448 if (len > 0 && buf[len-1] == '\0') {
1452 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1453 returning the text "unknown" from the readlink rather than the path
1454 to the executable (or returning an error from the readlink). Any valid
1455 path has a '/' in it somewhere, so use that to validate the result.
1456 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1458 if (len > 0 && memchr(buf, '/', len)) {
1459 sv_setpvn(sv,buf,len);
1465 #endif /* HAS_PROCSELFEXE */
1468 S_set_caret_X(pTHX) {
1470 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1472 #ifdef HAS_PROCSELFEXE
1473 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1476 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1478 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1485 =for apidoc perl_parse
1487 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1493 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1500 PERL_UNUSED_ARG(my_perl);
1502 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1505 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1506 setuid perl scripts securely.\n");
1507 #endif /* IAMSUID */
1510 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1511 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1512 * This MUST be done before any hash stores or fetches take place.
1513 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1514 * yourself, it is your responsibility to provide a good random seed!
1515 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1516 if (!PL_rehash_seed_set)
1517 PL_rehash_seed = get_hash_seed();
1519 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1521 if (s && (atoi(s) == 1))
1522 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1524 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1529 if (PL_origalen != 0) {
1530 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1533 /* Set PL_origalen be the sum of the contiguous argv[]
1534 * elements plus the size of the env in case that it is
1535 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1536 * as the maximum modifiable length of $0. In the worst case
1537 * the area we are able to modify is limited to the size of
1538 * the original argv[0]. (See below for 'contiguous', though.)
1540 const char *s = NULL;
1543 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1544 /* Do the mask check only if the args seem like aligned. */
1546 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1548 /* See if all the arguments are contiguous in memory. Note
1549 * that 'contiguous' is a loose term because some platforms
1550 * align the argv[] and the envp[]. If the arguments look
1551 * like non-aligned, assume that they are 'strictly' or
1552 * 'traditionally' contiguous. If the arguments look like
1553 * aligned, we just check that they are within aligned
1554 * PTRSIZE bytes. As long as no system has something bizarre
1555 * like the argv[] interleaved with some other data, we are
1556 * fine. (Did I just evoke Murphy's Law?) --jhi */
1557 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1559 for (i = 1; i < PL_origargc; i++) {
1560 if ((PL_origargv[i] == s + 1
1562 || PL_origargv[i] == s + 2
1567 (PL_origargv[i] > s &&
1569 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1580 #ifndef PERL_USE_SAFE_PUTENV
1581 /* Can we grab env area too to be used as the area for $0? */
1582 if (s && PL_origenviron && !PL_use_safe_putenv) {
1583 if ((PL_origenviron[0] == s + 1)
1586 (PL_origenviron[0] > s &&
1587 PL_origenviron[0] <=
1588 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1591 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1592 s = PL_origenviron[0];
1595 my_setenv("NoNe SuCh", NULL);
1596 /* Force copy of environment. */
1597 for (i = 1; PL_origenviron[i]; i++) {
1598 if (PL_origenviron[i] == s + 1
1601 (PL_origenviron[i] > s &&
1602 PL_origenviron[i] <=
1603 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1606 s = PL_origenviron[i];
1614 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1616 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1621 /* Come here if running an undumped a.out. */
1623 PL_origfilename = savepv(argv[0]);
1624 PL_do_undump = FALSE;
1625 cxstack_ix = -1; /* start label stack again */
1627 assert (!PL_tainted);
1629 S_set_caret_X(aTHX);
1631 init_postdump_symbols(argc,argv,env);
1636 op_free(PL_main_root);
1637 PL_main_root = NULL;
1639 PL_main_start = NULL;
1640 SvREFCNT_dec(PL_main_cv);
1644 oldscope = PL_scopestack_ix;
1645 PL_dowarn = G_WARN_OFF;
1650 parse_body(env,xsinit);
1652 call_list(oldscope, PL_unitcheckav);
1654 call_list(oldscope, PL_checkav);
1661 /* my_exit() was called */
1662 while (PL_scopestack_ix > oldscope)
1665 PL_curstash = PL_defstash;
1667 call_list(oldscope, PL_unitcheckav);
1669 call_list(oldscope, PL_checkav);
1673 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1682 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1686 int argc = PL_origargc;
1687 char **argv = PL_origargv;
1688 const char *scriptname = NULL;
1689 VOL bool dosearch = FALSE;
1690 const char *validarg = "";
1693 const char *cddir = NULL;
1694 #ifdef USE_SITECUSTOMIZE
1695 bool minus_f = FALSE;
1697 SV *linestr_sv = newSV_type(SVt_PVIV);
1698 bool add_read_e_script = FALSE;
1700 SvGROW(linestr_sv, 80);
1701 sv_setpvn(linestr_sv,"",0);
1703 sv = newSVpvs(""); /* first used for -I flags */
1709 for (argc--,argv++; argc > 0; argc--,argv++) {
1710 if (argv[0][0] != '-' || !argv[0][1])
1714 validarg = " PHOOEY ";
1718 * Can we rely on the kernel to start scripts with argv[1] set to
1719 * contain all #! line switches (the whole line)? (argv[0] is set to
1720 * the interpreter name, argv[2] to the script name; argv[3] and
1721 * above may contain other arguments.)
1728 #ifndef PERL_STRICT_CR
1752 if ((s = moreswitches(s)))
1757 CHECK_MALLOC_TOO_LATE_FOR('t');
1758 if( !PL_tainting ) {
1759 PL_taint_warn = TRUE;
1765 CHECK_MALLOC_TOO_LATE_FOR('T');
1767 PL_taint_warn = FALSE;
1775 #ifdef MACOS_TRADITIONAL
1776 /* ignore -e for Dev:Pseudo argument */
1777 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1780 forbid_setid('e', -1);
1782 PL_e_script = newSVpvs("");
1783 add_read_e_script = TRUE;
1786 sv_catpv(PL_e_script, s);
1788 sv_catpv(PL_e_script, argv[1]);
1792 Perl_croak(aTHX_ "No code specified for -%c", c);
1793 sv_catpvs(PL_e_script, "\n");
1797 #ifdef USE_SITECUSTOMIZE
1803 case 'I': /* -I handled both here and in moreswitches() */
1804 forbid_setid('I', -1);
1805 if (!*++s && (s=argv[1]) != NULL) {
1809 STRLEN len = strlen(s);
1810 const char * const p = savepvn(s, len);
1811 incpush(p, TRUE, TRUE, FALSE, FALSE);
1812 sv_catpvs(sv, "-I");
1813 sv_catpvn(sv, p, len);
1818 Perl_croak(aTHX_ "No directory specified for -I");
1821 forbid_setid('P', -1);
1822 PL_preprocess = TRUE;
1827 forbid_setid('S', -1);
1835 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1837 /* Can't do newSVpvs() as that would involve pre-processor
1838 condititionals inside a macro expansion. */
1839 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1846 # ifdef PERL_DONT_CREATE_GVSV
1847 " PERL_DONT_CREATE_GVSV"
1849 # ifdef PERL_MALLOC_WRAP
1852 # ifdef PERL_MEM_LOG
1855 # ifdef PERL_MEM_LOG_ENV
1858 # ifdef PERL_MEM_LOG_ENV_FD
1859 " PERL_MEM_LOG_ENV_FD"
1861 # ifdef PERL_MEM_LOG_STDERR
1862 " PERL_MEM_LOG_STDERR"
1864 # ifdef PERL_MEM_LOG_TIMESTAMP
1865 " PERL_MEM_LOG_TIMESTAMP"
1867 # ifdef PERL_USE_SAFE_PUTENV
1868 " PERL_USE_SAFE_PUTENV"
1870 # ifdef USE_SITECUSTOMIZE
1871 " USE_SITECUSTOMIZE"
1875 sv_catpv(opts_prog, PL_bincompat_options);
1876 /* Terminate the qw(, and then wrap at 76 columns. */
1877 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1879 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1881 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1884 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1886 #if defined(LOCAL_PATCH_COUNT)
1887 if (LOCAL_PATCH_COUNT > 0) {
1889 sv_catpvs(opts_prog,
1890 "\" Locally applied patches:\\n\",");
1891 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1892 if (PL_localpatches[i])
1893 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1894 0, PL_localpatches[i], 0);
1898 Perl_sv_catpvf(aTHX_ opts_prog,
1899 "\" Built under %s\\n",OSNAME);
1902 Perl_sv_catpvf(aTHX_ opts_prog,
1903 " Compiled at %s %s\\n\"",__DATE__,
1906 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1910 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1911 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1912 "sort grep {/^PERL/} keys %ENV; ");
1914 sv_catpvs(opts_prog,
1915 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1917 sv_catpvs(opts_prog,
1918 "print \" \\%ENV:\\n @env\\n\" if @env;"
1919 "print \" \\@INC:\\n @INC\\n\";");
1923 opts_prog = Perl_newSVpvf(aTHX_
1924 "Config::config_vars(qw%c%s%c)",
1928 av_push(PL_preambleav, opts_prog);
1929 /* don't look for script or read stdin */
1930 scriptname = BIT_BUCKET;
1934 PL_doextract = TRUE;
1942 if (!*++s || isSPACE(*s)) {
1946 /* catch use of gnu style long options */
1947 if (strEQ(s, "version")) {
1951 if (strEQ(s, "help")) {
1958 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1969 #ifndef SECURE_INTERNAL_GETENV
1972 (s = PerlEnv_getenv("PERL5OPT")))
1974 const char *popt = s;
1977 if (*s == '-' && *(s+1) == 'T') {
1978 CHECK_MALLOC_TOO_LATE_FOR('T');
1980 PL_taint_warn = FALSE;
1983 char *popt_copy = NULL;
1996 if (!strchr("CDIMUdmtw", *s))
1997 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2001 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
2002 s = popt_copy + (s - popt);
2003 d = popt_copy + (d - popt);
2010 if( !PL_tainting ) {
2011 PL_taint_warn = TRUE;
2022 #ifdef USE_SITECUSTOMIZE
2024 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2025 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2030 scriptname = argv[0];
2033 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2035 else if (scriptname == NULL) {
2037 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2043 /* Set $^X early so that it can be used for relocatable paths in @INC */
2044 assert (!PL_tainted);
2046 S_set_caret_X(aTHX);
2053 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2055 validate_suid(validarg, scriptname, fdscript, suidscript,
2059 # if defined(SIGCHLD) || defined(SIGCLD)
2062 # define SIGCHLD SIGCLD
2064 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2065 if (sigstate == (Sighandler_t) SIG_IGN) {
2066 if (ckWARN(WARN_SIGNAL))
2067 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2068 "Can't ignore signal CHLD, forcing to default");
2069 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2076 #ifdef MACOS_TRADITIONAL
2077 || gMacPerl_AlwaysExtract
2081 /* This will croak if suidscript is >= 0, as -x cannot be used with
2083 forbid_setid('x', suidscript);
2084 /* Hence you can't get here if suidscript >= 0 */
2086 find_beginning(linestr_sv, rsfp);
2087 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2088 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2092 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2093 CvUNIQUE_on(PL_compcv);
2095 CvPADLIST(PL_compcv) = pad_new(0);
2097 PL_isarev = newHV();
2100 boot_core_UNIVERSAL();
2101 boot_core_xsutils();
2105 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2107 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2113 # ifdef HAS_SOCKS5_INIT
2114 socks5_init(argv[0]);
2120 init_predump_symbols();
2121 /* init_postdump_symbols not currently designed to be called */
2122 /* more than once (ENV isn't cleared first, for example) */
2123 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2125 init_postdump_symbols(argc,argv,env);
2127 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2128 * or explicitly in some platforms.
2129 * locale.c:Perl_init_i18nl10n() if the environment
2130 * look like the user wants to use UTF-8. */
2131 #if defined(__SYMBIAN32__)
2132 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2135 /* Requires init_predump_symbols(). */
2136 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2141 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2142 * and the default open disciplines. */
2143 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2144 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2146 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2147 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2148 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2150 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2151 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2152 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2154 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2155 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2156 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2158 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2159 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2162 sv_setpvn(sv, ":utf8\0:utf8", 11);
2164 sv_setpvn(sv, ":utf8\0", 6);
2167 sv_setpvn(sv, "\0:utf8", 6);
2175 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2176 if (strEQ(s, "unsafe"))
2177 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2178 else if (strEQ(s, "safe"))
2179 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2181 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2188 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2192 PL_xmlfp = PerlIO_stdout();
2194 PL_xmlfp = PerlIO_open(s, "w");
2196 Perl_croak(aTHX_ "Can't open %s", s);
2198 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2204 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2205 PL_madskills = atoi(s);
2206 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2211 lex_start(linestr_sv, rsfp, TRUE);
2212 PL_subname = newSVpvs("main");
2214 if (add_read_e_script)
2215 filter_add(read_e_script, NULL);
2217 /* now parse the script */
2219 SETERRNO(0,SS_NORMAL);
2220 #ifdef MACOS_TRADITIONAL
2221 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2223 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2225 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2226 MacPerl_MPWFileName(PL_origfilename));
2230 if (yyparse() || PL_parser->error_count) {
2232 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2234 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2239 CopLINE_set(PL_curcop, 0);
2240 PL_curstash = PL_defstash;
2241 PL_preprocess = FALSE;
2243 SvREFCNT_dec(PL_e_script);
2251 SAVECOPFILE(PL_curcop);
2252 SAVECOPLINE(PL_curcop);
2253 gv_check(PL_defstash);
2262 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2263 dump_mstats("after compilation:");
2273 =for apidoc perl_run
2275 Tells a Perl interpreter to run. See L<perlembed>.
2288 PERL_UNUSED_ARG(my_perl);
2290 oldscope = PL_scopestack_ix;
2298 cxstack_ix = -1; /* start context stack again */
2300 case 0: /* normal completion */
2304 case 2: /* my_exit() */
2305 while (PL_scopestack_ix > oldscope)
2308 PL_curstash = PL_defstash;
2309 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2310 PL_endav && !PL_minus_c)
2311 call_list(oldscope, PL_endav);
2313 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2314 dump_mstats("after execution: ");
2320 POPSTACK_TO(PL_mainstack);
2323 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2334 S_run_body(pTHX_ I32 oldscope)
2337 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2338 PL_sawampersand ? "Enabling" : "Omitting"));
2340 if (!PL_restartop) {
2344 exit(0); /* less likely to core dump than my_exit(0) */
2347 DEBUG_x(dump_all());
2350 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2352 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2356 #ifdef MACOS_TRADITIONAL
2357 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2358 (gMacPerl_ErrorFormat ? "# " : ""),
2359 MacPerl_MPWFileName(PL_origfilename));
2361 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2365 if (PERLDB_SINGLE && PL_DBsingle)
2366 sv_setiv(PL_DBsingle, 1);
2368 call_list(oldscope, PL_initav);
2369 #ifdef PERL_DEBUG_READONLY_OPS
2370 Perl_pending_Slabs_to_ro(aTHX);
2377 PL_op = PL_restartop;
2381 else if (PL_main_start) {
2382 CvDEPTH(PL_main_cv) = 1;
2383 PL_op = PL_main_start;
2391 =head1 SV Manipulation Functions
2393 =for apidoc p||get_sv
2395 Returns the SV of the specified Perl scalar. If C<create> is set and the
2396 Perl variable does not exist then it will be created. If C<create> is not
2397 set and the variable does not exist then NULL is returned.
2403 Perl_get_sv(pTHX_ const char *name, I32 create)
2406 gv = gv_fetchpv(name, create, SVt_PV);
2413 =head1 Array Manipulation Functions
2415 =for apidoc p||get_av
2417 Returns the AV of the specified Perl array. If C<create> is set and the
2418 Perl variable does not exist then it will be created. If C<create> is not
2419 set and the variable does not exist then NULL is returned.
2425 Perl_get_av(pTHX_ const char *name, I32 create)
2427 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2436 =head1 Hash Manipulation Functions
2438 =for apidoc p||get_hv
2440 Returns the HV of the specified Perl hash. If C<create> is set and the
2441 Perl variable does not exist then it will be created. If C<create> is not
2442 set and the variable does not exist then NULL is returned.
2448 Perl_get_hv(pTHX_ const char *name, I32 create)
2450 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2459 =head1 CV Manipulation Functions
2461 =for apidoc p||get_cvn_flags
2463 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2464 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2465 exist then it will be declared (which has the same effect as saying
2466 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2467 then NULL is returned.
2469 =for apidoc p||get_cv
2471 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2477 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2479 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2480 /* XXX this is probably not what they think they're getting.
2481 * It has the same effect as "sub name;", i.e. just a forward
2483 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2484 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2485 return newSUB(start_subparse(FALSE, 0),
2486 newSVOP(OP_CONST, 0, sv),
2495 Perl_get_cv(pTHX_ const char *name, I32 flags)
2497 return get_cvn_flags(name, strlen(name), flags);
2500 /* Be sure to refetch the stack pointer after calling these routines. */
2504 =head1 Callback Functions
2506 =for apidoc p||call_argv
2508 Performs a callback to the specified Perl sub. See L<perlcall>.
2514 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2516 /* See G_* flags in cop.h */
2517 /* null terminated arg list */
2525 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2530 return call_pv(sub_name, flags);
2534 =for apidoc p||call_pv
2536 Performs a callback to the specified Perl sub. See L<perlcall>.
2542 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2543 /* name of the subroutine */
2544 /* See G_* flags in cop.h */
2546 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2550 =for apidoc p||call_method
2552 Performs a callback to the specified Perl method. The blessed object must
2553 be on the stack. See L<perlcall>.
2559 Perl_call_method(pTHX_ const char *methname, I32 flags)
2560 /* name of the subroutine */
2561 /* See G_* flags in cop.h */
2563 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2566 /* May be called with any of a CV, a GV, or an SV containing the name. */
2568 =for apidoc p||call_sv
2570 Performs a callback to the Perl sub whose name is in the SV. See
2577 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2578 /* See G_* flags in cop.h */
2581 LOGOP myop; /* fake syntax tree node */
2586 bool oldcatch = CATCH_GET;
2588 OP* const oldop = PL_op;
2591 if (flags & G_DISCARD) {
2596 Zero(&myop, 1, LOGOP);
2597 myop.op_next = NULL;
2598 if (!(flags & G_NOARGS))
2599 myop.op_flags |= OPf_STACKED;
2600 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2601 (flags & G_ARRAY) ? OPf_WANT_LIST :
2606 EXTEND(PL_stack_sp, 1);
2607 *++PL_stack_sp = sv;
2609 oldscope = PL_scopestack_ix;
2611 if (PERLDB_SUB && PL_curstash != PL_debstash
2612 /* Handle first BEGIN of -d. */
2613 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2614 /* Try harder, since this may have been a sighandler, thus
2615 * curstash may be meaningless. */
2616 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2617 && !(flags & G_NODEBUG))
2618 PL_op->op_private |= OPpENTERSUB_DB;
2620 if (flags & G_METHOD) {
2621 Zero(&method_op, 1, UNOP);
2622 method_op.op_next = PL_op;
2623 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2624 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2625 PL_op = (OP*)&method_op;
2628 if (!(flags & G_EVAL)) {
2630 CALL_BODY_SUB((OP*)&myop);
2631 retval = PL_stack_sp - (PL_stack_base + oldmark);
2632 CATCH_SET(oldcatch);
2635 myop.op_other = (OP*)&myop;
2637 create_eval_scope(flags|G_FAKINGEVAL);
2645 CALL_BODY_SUB((OP*)&myop);
2646 retval = PL_stack_sp - (PL_stack_base + oldmark);
2647 if (!(flags & G_KEEPERR))
2648 sv_setpvn(ERRSV,"",0);
2654 /* my_exit() was called */
2655 PL_curstash = PL_defstash;
2658 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2659 Perl_croak(aTHX_ "Callback called exit");
2664 PL_op = PL_restartop;
2668 PL_stack_sp = PL_stack_base + oldmark;
2669 if (flags & G_ARRAY)
2673 *++PL_stack_sp = &PL_sv_undef;
2678 if (PL_scopestack_ix > oldscope)
2679 delete_eval_scope();
2683 if (flags & G_DISCARD) {
2684 PL_stack_sp = PL_stack_base + oldmark;
2693 /* Eval a string. The G_EVAL flag is always assumed. */
2696 =for apidoc p||eval_sv
2698 Tells Perl to C<eval> the string in the SV.
2704 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2706 /* See G_* flags in cop.h */
2710 UNOP myop; /* fake syntax tree node */
2711 VOL I32 oldmark = SP - PL_stack_base;
2714 OP* const oldop = PL_op;
2717 if (flags & G_DISCARD) {
2724 Zero(PL_op, 1, UNOP);
2725 EXTEND(PL_stack_sp, 1);
2726 *++PL_stack_sp = sv;
2728 if (!(flags & G_NOARGS))
2729 myop.op_flags = OPf_STACKED;
2730 myop.op_next = NULL;
2731 myop.op_type = OP_ENTEREVAL;
2732 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2733 (flags & G_ARRAY) ? OPf_WANT_LIST :
2735 if (flags & G_KEEPERR)
2736 myop.op_flags |= OPf_SPECIAL;
2738 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2739 * before a PUSHEVAL, which corrupts the stack after a croak */
2740 TAINT_PROPER("eval_sv()");
2746 CALL_BODY_EVAL((OP*)&myop);
2747 retval = PL_stack_sp - (PL_stack_base + oldmark);
2748 if (!(flags & G_KEEPERR))
2749 sv_setpvn(ERRSV,"",0);
2755 /* my_exit() was called */
2756 PL_curstash = PL_defstash;
2759 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2760 Perl_croak(aTHX_ "Callback called exit");
2765 PL_op = PL_restartop;
2769 PL_stack_sp = PL_stack_base + oldmark;
2770 if (flags & G_ARRAY)
2774 *++PL_stack_sp = &PL_sv_undef;
2780 if (flags & G_DISCARD) {
2781 PL_stack_sp = PL_stack_base + oldmark;
2791 =for apidoc p||eval_pv
2793 Tells Perl to C<eval> the given string and return an SV* result.
2799 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2803 SV* sv = newSVpv(p, 0);
2805 eval_sv(sv, G_SCALAR);
2812 if (croak_on_error && SvTRUE(ERRSV)) {
2813 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2819 /* Require a module. */
2822 =head1 Embedding Functions
2824 =for apidoc p||require_pv
2826 Tells Perl to C<require> the file named by the string argument. It is
2827 analogous to the Perl code C<eval "require '$file'">. It's even
2828 implemented that way; consider using load_module instead.
2833 Perl_require_pv(pTHX_ const char *pv)
2838 PUSHSTACKi(PERLSI_REQUIRE);
2840 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2841 eval_sv(sv_2mortal(sv), G_DISCARD);
2847 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2849 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2852 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2856 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2858 /* This message really ought to be max 23 lines.
2859 * Removed -h because the user already knows that option. Others? */
2861 static const char * const usage_msg[] = {
2862 "-0[octal] specify record separator (\\0, if no argument)",
2863 "-a autosplit mode with -n or -p (splits $_ into @F)",
2864 "-C[number/list] enables the listed Unicode features",
2865 "-c check syntax only (runs BEGIN and CHECK blocks)",
2866 "-d[:debugger] run program under debugger",
2867 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2868 "-e program one line of program (several -e's allowed, omit programfile)",
2869 "-E program like -e, but enables all optional features",
2870 "-f don't do $sitelib/sitecustomize.pl at startup",
2871 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2872 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2873 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2874 "-l[octal] enable line ending processing, specifies line terminator",
2875 "-[mM][-]module execute \"use/no module...\" before executing program",
2876 "-n assume \"while (<>) { ... }\" loop around program",
2877 "-p assume loop like -n but print line also, like sed",
2878 "-P run program through C preprocessor before compilation",
2879 "-s enable rudimentary parsing for switches after programfile",
2880 "-S look for programfile using PATH environment variable",
2881 "-t enable tainting warnings",
2882 "-T enable tainting checks",
2883 "-u dump core after parsing program",
2884 "-U allow unsafe operations",
2885 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2886 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2887 "-w enable many useful warnings (RECOMMENDED)",
2888 "-W enable all warnings",
2889 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2890 "-X disable all warnings",
2894 const char * const *p = usage_msg;
2896 PerlIO_printf(PerlIO_stdout(),
2897 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2900 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2903 /* convert a string of -D options (or digits) into an int.
2904 * sets *s to point to the char after the options */
2908 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2910 static const char * const usage_msgd[] = {
2911 " Debugging flag values: (see also -d)",
2912 " p Tokenizing and parsing (with v, displays parse stack)",
2913 " s Stack snapshots (with v, displays all stacks)",
2914 " l Context (loop) stack processing",
2915 " t Trace execution",
2916 " o Method and overloading resolution",
2917 " c String/numeric conversions",
2918 " P Print profiling info, preprocessor command for -P, source file input state",
2919 " m Memory allocation",
2920 " f Format processing",
2921 " r Regular expression parsing and execution",
2922 " x Syntax tree dump",
2923 " u Tainting checks",
2924 " H Hash dump -- usurps values()",
2925 " X Scratchpad allocation",
2927 " S Thread synchronization",
2929 " R Include reference counts of dumped variables (eg when using -Ds)",
2930 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2931 " v Verbose: use in conjunction with other flags",
2933 " A Consistency checks on internal structures",
2934 " q quiet - currently only suppresses the 'EXECUTING' message",
2939 /* if adding extra options, remember to update DEBUG_MASK */
2940 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2942 for (; isALNUM(**s); (*s)++) {
2943 const char * const d = strchr(debopts,**s);
2945 i |= 1 << (d - debopts);
2946 else if (ckWARN_d(WARN_DEBUGGING))
2947 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2948 "invalid option -D%c, use -D'' to see choices\n", **s);
2951 else if (isDIGIT(**s)) {
2953 for (; isALNUM(**s); (*s)++) ;
2955 else if (givehelp) {
2956 const char *const *p = usage_msgd;
2957 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2960 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2961 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2962 "-Dp not implemented on this platform\n");
2968 /* This routine handles any switches that can be given during run */
2971 Perl_moreswitches(pTHX_ const char *s)
2982 SvREFCNT_dec(PL_rs);
2983 if (s[1] == 'x' && s[2]) {
2984 const char *e = s+=2;
2990 flags = PERL_SCAN_SILENT_ILLDIGIT;
2991 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2992 if (s + numlen < e) {
2993 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2997 PL_rs = newSVpvs("");
2998 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2999 tmps = (U8*)SvPVX(PL_rs);
3000 uvchr_to_utf8(tmps, rschar);
3001 SvCUR_set(PL_rs, UNISKIP(rschar));
3006 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3007 if (rschar & ~((U8)~0))
3008 PL_rs = &PL_sv_undef;
3009 else if (!rschar && numlen >= 2)
3010 PL_rs = newSVpvs("");
3012 char ch = (char)rschar;
3013 PL_rs = newSVpvn(&ch, 1);
3016 sv_setsv(get_sv("/", TRUE), PL_rs);
3021 PL_unicode = parse_unicode_opts( (const char **)&s );
3022 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3028 while (*s && !isSPACE(*s)) ++s;
3029 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3040 forbid_setid('d', -1);
3043 /* -dt indicates to the debugger that threads will be used */
3044 if (*s == 't' && !isALNUM(s[1])) {
3046 my_setenv("PERL5DB_THREADED", "1");
3049 /* The following permits -d:Mod to accepts arguments following an =
3050 in the fashion that -MSome::Mod does. */
3051 if (*s == ':' || *s == '=') {
3052 const char *start = ++s;
3053 const char *const end = s + strlen(s);
3054 SV * const sv = newSVpvs("use Devel::");
3056 /* We now allow -d:Module=Foo,Bar */
3057 while(isALNUM(*s) || *s==':') ++s;
3059 sv_catpvn(sv, start, end - start);
3061 sv_catpvn(sv, start, s-start);
3062 /* Don't use NUL as q// delimiter here, this string goes in the
3064 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3067 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3071 PL_perldb = PERLDB_ALL;
3078 forbid_setid('D', -1);
3080 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3081 #else /* !DEBUGGING */
3082 if (ckWARN_d(WARN_DEBUGGING))
3083 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3084 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3085 for (s++; isALNUM(*s); s++) ;
3090 usage(PL_origargv[0]);
3093 Safefree(PL_inplace);
3094 #if defined(__CYGWIN__) /* do backup extension automagically */
3095 if (*(s+1) == '\0') {
3096 PL_inplace = savepvs(".bak");
3099 #endif /* __CYGWIN__ */
3101 const char * const start = ++s;
3102 while (*s && !isSPACE(*s))
3105 PL_inplace = savepvn(start, s - start);
3109 if (*s == '-') /* Additional switches on #! line. */
3113 case 'I': /* -I handled both here and in parse_body() */
3114 forbid_setid('I', -1);
3116 while (*s && isSPACE(*s))
3121 /* ignore trailing spaces (possibly followed by other switches) */
3123 for (e = p; *e && !isSPACE(*e); e++) ;
3127 } while (*p && *p != '-');
3128 e = savepvn(s, e-s);
3129 incpush(e, TRUE, TRUE, FALSE, FALSE);
3136 Perl_croak(aTHX_ "No directory specified for -I");
3142 SvREFCNT_dec(PL_ors_sv);
3148 PL_ors_sv = newSVpvs("\n");
3149 numlen = 3 + (*s == '0');
3150 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3154 if (RsPARA(PL_rs)) {
3155 PL_ors_sv = newSVpvs("\n\n");
3158 PL_ors_sv = newSVsv(PL_rs);
3163 forbid_setid('M', -1); /* XXX ? */
3166 forbid_setid('m', -1); /* XXX ? */
3171 const char *use = "use ";
3172 /* -M-foo == 'no foo' */
3173 /* Leading space on " no " is deliberate, to make both
3174 possibilities the same length. */
3175 if (*s == '-') { use = " no "; ++s; }
3176 sv = newSVpvn(use,4);
3178 /* We allow -M'Module qw(Foo Bar)' */
3179 while(isALNUM(*s) || *s==':') ++s;
3180 end = s + strlen(s);
3182 sv_catpvn(sv, start, end - start);
3183 if (*(start-1) == 'm') {
3185 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3186 sv_catpvs( sv, " ()");
3190 Perl_croak(aTHX_ "Module name required with -%c option",
3192 sv_catpvn(sv, start, s-start);
3193 /* Use NUL as q''-delimiter. */
3194 sv_catpvs(sv, " split(/,/,q\0");
3196 sv_catpvn(sv, s, end - s);
3197 sv_catpvs(sv, "\0)");
3200 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3203 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3214 forbid_setid('s', -1);
3215 PL_doswitches = TRUE;
3229 #ifdef MACOS_TRADITIONAL
3230 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3232 PL_do_undump = TRUE;
3240 if (!sv_derived_from(PL_patchlevel, "version"))
3241 upg_version(PL_patchlevel, TRUE);
3243 PerlIO_printf(PerlIO_stdout(),
3244 Perl_form(aTHX_ "\nThis is perl, %"SVf
3245 #ifdef PERL_PATCHNUM
3246 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3249 SVfARG(vstringify(PL_patchlevel)),
3252 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3253 PerlIO_printf(PerlIO_stdout(),
3254 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3255 SVfARG(vstringify(PL_patchlevel))));
3256 PerlIO_printf(PerlIO_stdout(),
3257 Perl_form(aTHX_ " built under %s at %s %s\n",
3258 OSNAME, __DATE__, __TIME__));
3259 PerlIO_printf(PerlIO_stdout(),
3260 Perl_form(aTHX_ " OS Specific Release: %s\n",
3264 #if defined(LOCAL_PATCH_COUNT)
3265 if (LOCAL_PATCH_COUNT > 0)
3266 PerlIO_printf(PerlIO_stdout(),
3267 "\n(with %d registered patch%s, "
3268 "see perl -V for more detail)",
3270 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3273 PerlIO_printf(PerlIO_stdout(),
3274 "\n\nCopyright 1987-2007, Larry Wall\n");
3275 #ifdef MACOS_TRADITIONAL
3276 PerlIO_printf(PerlIO_stdout(),
3277 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3278 "maintained by Chris Nandor\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3285 PerlIO_printf(PerlIO_stdout(),
3286 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3287 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3292 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3295 PerlIO_printf(PerlIO_stdout(),
3296 "atariST series port, ++jrb bammi@cadence.com\n");
3299 PerlIO_printf(PerlIO_stdout(),
3300 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3303 PerlIO_printf(PerlIO_stdout(),
3304 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3307 PerlIO_printf(PerlIO_stdout(),
3308 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3311 PerlIO_printf(PerlIO_stdout(),
3312 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3315 PerlIO_printf(PerlIO_stdout(),
3316 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3319 PerlIO_printf(PerlIO_stdout(),
3320 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3323 PerlIO_printf(PerlIO_stdout(),
3324 "MiNT port by Guido Flohr, 1997-1999\n");
3327 PerlIO_printf(PerlIO_stdout(),
3328 "EPOC port by Olaf Flebbe, 1999-2002\n");
3331 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3332 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3335 #ifdef __SYMBIAN32__
3336 PerlIO_printf(PerlIO_stdout(),
3337 "Symbian port by Nokia, 2004-2005\n");
3339 #ifdef BINARY_BUILD_NOTICE
3340 BINARY_BUILD_NOTICE;
3342 PerlIO_printf(PerlIO_stdout(),
3344 Perl may be copied only under the terms of either the Artistic License or the\n\
3345 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3346 Complete documentation for Perl, including FAQ lists, should be found on\n\
3347 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3348 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3351 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3352 PL_dowarn |= G_WARN_ON;
3357 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3358 if (!specialWARN(PL_compiling.cop_warnings))
3359 PerlMemShared_free(PL_compiling.cop_warnings);
3360 PL_compiling.cop_warnings = pWARN_ALL ;
3364 PL_dowarn = G_WARN_ALL_OFF;
3365 if (!specialWARN(PL_compiling.cop_warnings))
3366 PerlMemShared_free(PL_compiling.cop_warnings);
3367 PL_compiling.cop_warnings = pWARN_NONE ;
3372 if (s[1] == '-') /* Additional switches on #! line. */
3377 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3383 #ifdef ALTERNATE_SHEBANG
3384 case 'S': /* OS/2 needs -S on "extproc" line. */
3392 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3397 /* compliments of Tom Christiansen */
3399 /* unexec() can be found in the Gnu emacs distribution */
3400 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3403 Perl_my_unexec(pTHX)
3405 PERL_UNUSED_CONTEXT;
3407 SV * prog = newSVpv(BIN_EXP, 0);
3408 SV * file = newSVpv(PL_origfilename, 0);
3412 sv_catpvs(prog, "/perl");
3413 sv_catpvs(file, ".perldump");
3415 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3416 /* unexec prints msg to stderr in case of failure */
3417 PerlProc_exit(status);
3420 # include <lib$routines.h>
3421 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3422 # elif defined(WIN32) || defined(__CYGWIN__)
3423 Perl_croak(aTHX_ "dump is not supported");
3425 ABORT(); /* for use with undump */
3430 /* initialize curinterp */
3436 # define PERLVAR(var,type)
3437 # define PERLVARA(var,n,type)
3438 # if defined(PERL_IMPLICIT_CONTEXT)
3439 # define PERLVARI(var,type,init) aTHX->var = init;
3440 # define PERLVARIC(var,type,init) aTHX->var = init;
3442 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3443 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3445 # include "intrpvar.h"
3451 # define PERLVAR(var,type)
3452 # define PERLVARA(var,n,type)
3453 # define PERLVARI(var,type,init) PL_##var = init;
3454 # define PERLVARIC(var,type,init) PL_##var = init;
3455 # include "intrpvar.h"
3462 /* As these are inside a structure, PERLVARI isn't capable of initialising
3464 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3465 PL_reg_poscache = PL_reg_starttry = NULL;
3469 S_init_main_stash(pTHX)
3474 PL_curstash = PL_defstash = newHV();
3475 /* We know that the string "main" will be in the global shared string
3476 table, so it's a small saving to use it rather than allocate another
3478 PL_curstname = newSVpvs_share("main");
3479 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3480 /* If we hadn't caused another reference to "main" to be in the shared
3481 string table above, then it would be worth reordering these two,
3482 because otherwise all we do is delete "main" from it as a consequence
3483 of the SvREFCNT_dec, only to add it again with hv_name_set */
3484 SvREFCNT_dec(GvHV(gv));
3485 hv_name_set(PL_defstash, "main", 4, 0);
3486 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3488 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3490 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3491 GvMULTI_on(PL_incgv);
3492 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3493 GvMULTI_on(PL_hintgv);
3494 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3495 SvREFCNT_inc_simple_void(PL_defgv);
3496 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3497 SvREFCNT_inc_simple_void(PL_errgv);
3498 GvMULTI_on(PL_errgv);
3499 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3500 GvMULTI_on(PL_replgv);
3501 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3502 #ifdef PERL_DONT_CREATE_GVSV
3505 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3506 sv_setpvn(ERRSV, "", 0);
3507 PL_curstash = PL_defstash;
3508 CopSTASH_set(&PL_compiling, PL_defstash);
3509 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3510 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3512 /* We must init $/ before switches are processed. */
3513 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3517 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3518 int *suidscript, PerlIO **rsfpp)
3523 const char *cpp_discard_flag;
3532 PL_origfilename = savepvs("-e");
3535 /* if find_script() returns, it returns a malloc()-ed value */
3536 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3538 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3539 const char *s = scriptname + 8;
3545 * Tell apart "normal" usage of fdscript, e.g.
3546 * with bash on FreeBSD:
3547 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3548 * from usage in suidperl.
3549 * Does any "normal" usage leave garbage after the number???
3550 * Is it a mistake to use a similar /dev/fd/ construct for
3555 * Be supersafe and do some sanity-checks.
3556 * Still, can we be sure we got the right thing?
3559 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3562 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3564 scriptname = savepv(s + 1);
3565 Safefree(PL_origfilename);
3566 PL_origfilename = (char *)scriptname;
3571 CopFILE_free(PL_curcop);
3572 CopFILE_set(PL_curcop, PL_origfilename);
3573 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3574 scriptname = (char *)"";
3575 if (fdscript >= 0) {
3576 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3577 # if defined(HAS_FCNTL) && defined(F_SETFD)
3579 /* ensure close-on-exec */
3580 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3585 Perl_croak(aTHX_ "sperl needs fd script\n"
3586 "You should not call sperl directly; do you need to "
3587 "change a #! line\nfrom sperl to perl?\n");
3590 * Do not open (or do other fancy stuff) while setuid.
3591 * Perl does the open, and hands script to suidperl on a fd;
3592 * suidperl only does some checks, sets up UIDs and re-execs
3593 * perl with that fd as it has always done.
3596 if (*suidscript != 1) {
3597 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3600 else if (PL_preprocess) {
3601 const char * const cpp_cfg = CPPSTDIN;
3602 SV * const cpp = newSVpvs("");
3603 SV * const cmd = newSV(0);
3605 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3606 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3607 if (strEQ(cpp_cfg, "cppstdin"))
3608 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3609 sv_catpv(cpp, cpp_cfg);
3612 sv_catpvs(sv, "-I");
3613 sv_catpv(sv,PRIVLIB_EXP);
3616 DEBUG_P(PerlIO_printf(Perl_debug_log,
3617 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3618 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3621 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3628 cpp_discard_flag = "";
3630 cpp_discard_flag = "-C";
3634 perl = os2_execname(aTHX);
3636 perl = PL_origargv[0];
3640 /* This strips off Perl comments which might interfere with
3641 the C pre-processor, including #!. #line directives are
3642 deliberately stripped to avoid confusion with Perl's version
3643 of #line. FWP played some golf with it so it will fit
3644 into VMS's 255 character buffer.
3647 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3649 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3651 Perl_sv_setpvf(aTHX_ cmd, "\
3652 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3653 perl, quote, code, quote, scriptname, SVfARG(cpp),
3654 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3656 PL_doextract = FALSE;
3658 DEBUG_P(PerlIO_printf(Perl_debug_log,
3659 "PL_preprocess: cmd=\"%s\"\n",
3662 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3666 else if (!*scriptname) {
3667 forbid_setid(0, *suidscript);
3668 *rsfpp = PerlIO_stdin();
3671 #ifdef FAKE_BIT_BUCKET
3672 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3673 * is called) and still have the "-e" work. (Believe it or not,
3674 * a /dev/null is required for the "-e" to work because source
3675 * filter magic is used to implement it. ) This is *not* a general
3676 * replacement for a /dev/null. What we do here is create a temp
3677 * file (an empty file), open up that as the script, and then
3678 * immediately close and unlink it. Close enough for jazz. */
3679 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3680 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3681 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3682 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3683 FAKE_BIT_BUCKET_TEMPLATE
3685 const char * const err = "Failed to create a fake bit bucket";
3686 if (strEQ(scriptname, BIT_BUCKET)) {
3687 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3688 int tmpfd = mkstemp(tmpname);
3690 scriptname = tmpname;
3693 Perl_croak(aTHX_ err);
3696 scriptname = mktemp(tmpname);
3698 Perl_croak(aTHX_ err);
3703 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3704 #ifdef FAKE_BIT_BUCKET
3705 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3706 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3707 && strlen(scriptname) == sizeof(tmpname) - 1) {
3710 scriptname = BIT_BUCKET;
3712 # if defined(HAS_FCNTL) && defined(F_SETFD)
3714 /* ensure close-on-exec */
3715 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3718 #endif /* IAMSUID */
3720 /* PSz 16 Sep 03 Keep neat error message */
3722 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3724 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3725 CopFILE(PL_curcop), Strerror(errno));
3731 * I_SYSSTATVFS HAS_FSTATVFS
3733 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3734 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3735 * here so that metaconfig picks them up. */
3739 S_fd_on_nosuid_fs(pTHX_ int fd)
3742 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3743 * but is needed also on machines without setreuid.
3744 * Seems safe enough to run as root.
3746 int check_okay = 0; /* able to do all the required sys/libcalls */
3747 int on_nosuid = 0; /* the fd is on a nosuid fs */
3749 * Need to check noexec also: nosuid might not be set, the average
3750 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3752 int on_noexec = 0; /* the fd is on a noexec fs */
3755 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3756 * fstatvfs() is UNIX98.
3757 * fstatfs() is 4.3 BSD.
3758 * ustat()+getmnt() is pre-4.3 BSD.
3759 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3760 * an irrelevant filesystem while trying to reach the right one.
3763 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3765 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3766 defined(HAS_FSTATVFS)
3767 # define FD_ON_NOSUID_CHECK_OKAY
3768 struct statvfs stfs;
3770 check_okay = fstatvfs(fd, &stfs) == 0;
3771 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3773 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3774 on platforms where it is present. */
3775 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3777 # endif /* fstatvfs */
3779 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3780 defined(PERL_MOUNT_NOSUID) && \
3781 defined(PERL_MOUNT_NOEXEC) && \
3782 defined(HAS_FSTATFS) && \
3783 defined(HAS_STRUCT_STATFS) && \
3784 defined(HAS_STRUCT_STATFS_F_FLAGS)
3785 # define FD_ON_NOSUID_CHECK_OKAY
3788 check_okay = fstatfs(fd, &stfs) == 0;
3789 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3790 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3791 # endif /* fstatfs */
3793 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3794 defined(PERL_MOUNT_NOSUID) && \
3795 defined(PERL_MOUNT_NOEXEC) && \
3796 defined(HAS_FSTAT) && \
3797 defined(HAS_USTAT) && \
3798 defined(HAS_GETMNT) && \
3799 defined(HAS_STRUCT_FS_DATA) && \
3801 # define FD_ON_NOSUID_CHECK_OKAY
3804 if (fstat(fd, &fdst) == 0) {
3806 if (ustat(fdst.st_dev, &us) == 0) {
3808 /* NOSTAT_ONE here because we're not examining fields which
3809 * vary between that case and STAT_ONE. */
3810 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3811 size_t cmplen = sizeof(us.f_fname);
3812 if (sizeof(fsd.fd_req.path) < cmplen)
3813 cmplen = sizeof(fsd.fd_req.path);
3814 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3815 fdst.st_dev == fsd.fd_req.dev) {
3817 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3818 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3823 # endif /* fstat+ustat+getmnt */
3825 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3826 defined(HAS_GETMNTENT) && \
3827 defined(HAS_HASMNTOPT) && \
3828 defined(MNTOPT_NOSUID) && \
3829 defined(MNTOPT_NOEXEC)
3830 # define FD_ON_NOSUID_CHECK_OKAY
3831 FILE *mtab = fopen("/etc/mtab", "r");
3832 struct mntent *entry;
3835 if (mtab && (fstat(fd, &stb) == 0)) {
3836 while (entry = getmntent(mtab)) {
3837 if (stat(entry->mnt_dir, &fsb) == 0
3838 && fsb.st_dev == stb.st_dev)
3840 /* found the filesystem */
3842 if (hasmntopt(entry, MNTOPT_NOSUID))
3844 if (hasmntopt(entry, MNTOPT_NOEXEC))
3847 } /* A single fs may well fail its stat(). */
3852 # endif /* getmntent+hasmntopt */
3855 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3857 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3859 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3860 return ((!check_okay) || on_nosuid || on_noexec);
3862 #endif /* IAMSUID */
3865 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3866 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3871 #endif /* IAMSUID */
3873 /* do we need to emulate setuid on scripts? */
3875 /* This code is for those BSD systems that have setuid #! scripts disabled
3876 * in the kernel because of a security problem. Merely defining DOSUID
3877 * in perl will not fix that problem, but if you have disabled setuid
3878 * scripts in the kernel, this will attempt to emulate setuid and setgid
3879 * on scripts that have those now-otherwise-useless bits set. The setuid
3880 * root version must be called suidperl or sperlN.NNN. If regular perl
3881 * discovers that it has opened a setuid script, it calls suidperl with
3882 * the same argv that it had. If suidperl finds that the script it has
3883 * just opened is NOT setuid root, it sets the effective uid back to the
3884 * uid. We don't just make perl setuid root because that loses the
3885 * effective uid we had before invoking perl, if it was different from the
3888 * Description/comments above do not match current workings:
3889 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3890 * suidperl called with script open and name changed to /dev/fd/N/X;
3891 * suidperl croaks if script is not setuid;
3892 * making perl setuid would be a huge security risk (and yes, that
3893 * would lose any euid we might have had).
3895 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3896 * be defined in suidperl only. suidperl must be setuid root. The
3897 * Configure script will set this up for you if you want it.
3903 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3904 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3905 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3907 const char *linestr;
3911 if (fdscript < 0 || suidscript != 1)
3912 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3914 * Since the script is opened by perl, not suidperl, some of these
3915 * checks are superfluous. Leaving them in probably does not lower
3919 * Do checks even for systems with no HAS_SETREUID.
3920 * We used to swap, then re-swap UIDs with
3921 # ifdef HAS_SETREUID
3922 if (setreuid(PL_euid,PL_uid) < 0
3923 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3924 Perl_croak(aTHX_ "Can't swap uid and euid");
3926 # ifdef HAS_SETREUID
3927 if (setreuid(PL_uid,PL_euid) < 0
3928 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3929 Perl_croak(aTHX_ "Can't reswap uid and euid");
3933 /* On this access check to make sure the directories are readable,
3934 * there is actually a small window that the user could use to make
3935 * filename point to an accessible directory. So there is a faint
3936 * chance that someone could execute a setuid script down in a
3937 * non-accessible directory. I don't know what to do about that.
3938 * But I don't think it's too important. The manual lies when
3939 * it says access() is useful in setuid programs.
3941 * So, access() is pretty useless... but not harmful... do anyway.
3943 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3944 Perl_croak(aTHX_ "Can't access() script\n");
3947 /* If we can swap euid and uid, then we can determine access rights
3948 * with a simple stat of the file, and then compare device and
3949 * inode to make sure we did stat() on the same file we opened.
3950 * Then we just have to make sure he or she can execute it.
3953 * As the script is opened by perl, not suidperl, we do not need to
3954 * care much about access rights.
3956 * The 'script changed' check is needed, or we can get lied to
3957 * about $0 with e.g.
3958 * suidperl /dev/fd/4//bin/x 4<setuidscript
3959 * Without HAS_SETREUID, is it safe to stat() as root?
3961 * Are there any operating systems that pass /dev/fd/xxx for setuid
3962 * scripts, as suggested/described in perlsec(1)? Surely they do not
3963 * pass the script name as we do, so the "script changed" test would
3964 * fail for them... but we never get here with
3965 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3967 * This is one place where we must "lie" about return status: not
3968 * say if the stat() failed. We are doing this as root, and could
3969 * be tricked into reporting existence or not of files that the
3970 * "plain" user cannot even see.
3974 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3975 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3976 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3977 Perl_croak(aTHX_ "Setuid script changed\n");
3981 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3982 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3985 * We used to do this check as the "plain" user (after swapping
3986 * UIDs). But the check for nosuid and noexec filesystem is needed,
3987 * and should be done even without HAS_SETREUID. (Maybe those
3988 * operating systems do not have such mount options anyway...)
3989 * Seems safe enough to do as root.
3991 # if !defined(NO_NOSUID_CHECK)
3992 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3993 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3996 # endif /* IAMSUID */
3998 if (!S_ISREG(PL_statbuf.st_mode)) {
3999 Perl_croak(aTHX_ "Setuid script not plain file\n");
4001 if (PL_statbuf.st_mode & S_IWOTH)
4002 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
4003 PL_doswitches = FALSE; /* -s is insecure in suid */
4004 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
4005 CopLINE_inc(PL_curcop);
4006 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
4007 Perl_croak(aTHX_ "No #! line");
4008 linestr = SvPV_nolen_const(linestr_sv);
4009 /* required even on Sys V */
4010 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4011 Perl_croak(aTHX_ "No #! line");
4015 /* Sanity check on line length */
4016 s_end = s + strlen(s);
4017 if (s_end == s || (s_end - s) > 4000)
4018 Perl_croak(aTHX_ "Very long #! line");
4019 /* Allow more than a single space after #! */
4020 while (isSPACE(*s)) s++;
4021 /* Sanity check on buffer end */
4022 while ((*s) && !isSPACE(*s)) s++;
4023 for (s2 = s; (s2 > linestr &&
4024 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4025 || s2[-1] == '-')); s2--) ;
4026 /* Sanity check on buffer start */
4027 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4028 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4029 Perl_croak(aTHX_ "Not a perl script");
4030 while (*s == ' ' || *s == '\t') s++;
4032 * #! arg must be what we saw above. They can invoke it by
4033 * mentioning suidperl explicitly, but they may not add any strange
4034 * arguments beyond what #! says if they do invoke suidperl that way.
4037 * The way validarg was set up, we rely on the kernel to start
4038 * scripts with argv[1] set to contain all #! line switches (the
4042 * Check that we got all the arguments listed in the #! line (not
4043 * just that there are no extraneous arguments). Might not matter
4044 * much, as switches from #! line seem to be acted upon (also), and
4045 * so may be checked and trapped in perl. But, security checks must
4046 * be done in suidperl and not deferred to perl. Note that suidperl
4047 * does not get around to parsing (and checking) the switches on
4048 * the #! line (but execs perl sooner).
4049 * Allow (require) a trailing newline (which may be of two
4050 * characters on some architectures?) (but no other trailing
4053 len = strlen(validarg);
4054 if (strEQ(validarg," PHOOEY ") ||
4055 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4056 !((s_end - s) == len+1
4057 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4058 Perl_croak(aTHX_ "Args must match #! line");
4062 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4063 PL_euid == PL_statbuf.st_uid)
4065 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4066 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4067 # endif /* IAMSUID */
4070 PL_euid) { /* oops, we're not the setuid root perl */
4072 * When root runs a setuid script, we do not go through the same
4073 * steps of execing sperl and then perl with fd scripts, but
4074 * simply set up UIDs within the same perl invocation; so do
4075 * not have the same checks (on options, whatever) that we have
4076 * for plain users. No problem really: would have to be a script
4077 * that does not actually work for plain users; and if root is
4078 * foolish and can be persuaded to run such an unsafe script, he
4079 * might run also non-setuid ones, and deserves what he gets.
4081 * Or, we might drop the PL_euid check above (and rely just on
4082 * fdscript to avoid loops), and do the execs
4088 * Pass fd script to suidperl.
4089 * Exec suidperl, substituting fd script for scriptname.
4090 * Pass script name as "subdir" of fd, which perl will grok;
4091 * in fact will use that to distinguish this from "normal"
4092 * usage, see comments above.
4094 PerlIO_rewind(rsfp);
4095 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4096 /* PSz 27 Feb 04 Sanity checks on scriptname */
4097 if ((!scriptname) || (!*scriptname) ) {
4098 Perl_croak(aTHX_ "No setuid script name\n");
4100 if (*scriptname == '-') {
4101 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4102 /* Or we might confuse it with an option when replacing
4103 * name in argument list, below (though we do pointer, not
4104 * string, comparisons).
4107 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4108 if (!PL_origargv[which]) {
4109 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4111 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4112 PerlIO_fileno(rsfp), PL_origargv[which]));
4113 # if defined(HAS_FCNTL) && defined(F_SETFD)
4114 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4117 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4118 (int)PERL_REVISION, (int)PERL_VERSION,
4119 (int)PERL_SUBVERSION), PL_origargv);
4121 # endif /* IAMSUID */
4122 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4125 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4127 * This seems back to front: we try HAS_SETEGID first; if not available
4128 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4129 * in the sense that we only want to set EGID; but are there any machines
4130 * with either of the latter, but not the former? Same with UID, later.
4133 (void)setegid(PL_statbuf.st_gid);
4135 # ifdef HAS_SETREGID
4136 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4138 # ifdef HAS_SETRESGID
4139 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4141 PerlProc_setgid(PL_statbuf.st_gid);
4145 if (PerlProc_getegid() != PL_statbuf.st_gid)
4146 Perl_croak(aTHX_ "Can't do setegid!\n");
4148 if (PL_statbuf.st_mode & S_ISUID) {
4149 if (PL_statbuf.st_uid != PL_euid)
4151 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4153 # ifdef HAS_SETREUID
4154 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4156 # ifdef HAS_SETRESUID
4157 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4159 PerlProc_setuid(PL_statbuf.st_uid);
4163 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4164 Perl_croak(aTHX_ "Can't do seteuid!\n");
4166 else if (PL_uid) { /* oops, mustn't run as root */
4168 (void)seteuid((Uid_t)PL_uid);
4170 # ifdef HAS_SETREUID
4171 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4173 # ifdef HAS_SETRESUID
4174 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4176 PerlProc_setuid((Uid_t)PL_uid);
4180 if (PerlProc_geteuid() != PL_uid)
4181 Perl_croak(aTHX_ "Can't do seteuid!\n");
4184 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4185 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4188 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4189 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4190 else if (fdscript < 0 || suidscript != 1)
4191 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4192 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4194 /* PSz 16 Sep 03 Keep neat error message */
4195 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4198 /* We absolutely must clear out any saved ids here, so we */
4199 /* exec the real perl, substituting fd script for scriptname. */
4200 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4202 * It might be thought that using setresgid and/or setresuid (changed to
4203 * set the saved IDs) above might obviate the need to exec, and we could
4204 * go on to "do the perl thing".
4206 * Is there such a thing as "saved GID", and is that set for setuid (but
4207 * not setgid) execution like suidperl? Without exec, it would not be
4208 * cleared for setuid (but not setgid) scripts (or might need a dummy
4211 * We need suidperl to do the exact same argument checking that perl
4212 * does. Thus it cannot be very small; while it could be significantly
4213 * smaller, it is safer (simpler?) to make it essentially the same
4214 * binary as perl (but they are not identical). - Maybe could defer that
4215 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4216 * but prefer to do thorough checks in suidperl itself. Such deferral
4217 * would make suidperl security rely on perl, a design no-no.
4219 * Setuid things should be short and simple, thus easy to understand and
4220 * verify. They should do their "own thing", without influence by
4221 * attackers. It may help if their internal execution flow is fixed,
4222 * regardless of platform: it may be best to exec anyway.
4224 * Suidperl should at least be conceptually simple: a wrapper only,
4225 * never to do any real perl. Maybe we should put
4227 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4229 * into the perly bits.
4231 PerlIO_rewind(rsfp);
4232 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4234 * Keep original arguments: suidperl already has fd script.
4236 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4237 /* if (!PL_origargv[which]) { */
4238 /* errno = EPERM; */
4239 /* Perl_croak(aTHX_ "Permission denied\n"); */
4241 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4242 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4243 # if defined(HAS_FCNTL) && defined(F_SETFD)
4244 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4247 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4248 (int)PERL_REVISION, (int)PERL_VERSION,
4249 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4251 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4252 # endif /* IAMSUID */
4254 PERL_UNUSED_ARG(fdscript);
4255 PERL_UNUSED_ARG(suidscript);
4256 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4257 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4258 PERL_UNUSED_ARG(rsfp);
4260 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4261 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4263 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4266 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4267 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4268 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4269 /* not set-id, must be wrapped */
4272 PERL_UNUSED_ARG(validarg);
4273 PERL_UNUSED_ARG(scriptname);
4274 PERL_UNUSED_ARG(linestr_sv);
4278 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4282 register const char *s2;
4283 #ifdef MACOS_TRADITIONAL
4287 /* skip forward in input to the real script? */
4289 #ifdef MACOS_TRADITIONAL
4290 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4292 while (PL_doextract || gMacPerl_AlwaysExtract) {
4293 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4294 if (!gMacPerl_AlwaysExtract)
4295 Perl_croak(aTHX_ "No Perl script found in input\n");
4297 if (PL_doextract) /* require explicit override ? */
4298 if (!OverrideExtract(PL_origfilename))
4299 Perl_croak(aTHX_ "User aborted script\n");
4301 PL_doextract = FALSE;
4303 /* Pater peccavi, file does not have #! */
4304 PerlIO_rewind(rsfp);
4309 while (PL_doextract) {
4310 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4311 Perl_croak(aTHX_ "No Perl script found in input\n");
4314 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4315 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4316 PL_doextract = FALSE;
4317 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4319 while (*s == ' ' || *s == '\t') s++;
4321 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4322 || s2[-1] == '_') s2--;
4323 if (strnEQ(s2-4,"perl",4))
4324 while ((s = moreswitches(s)))
4327 #ifdef MACOS_TRADITIONAL
4328 /* We are always searching for the #!perl line in MacPerl,
4329 * so if we find it, still keep the line count correct
4330 * by counting lines we already skipped over
4332 for (; maclines > 0 ; maclines--)
4333 PerlIO_ungetc(rsfp, '\n');
4337 /* gMacPerl_AlwaysExtract is false in MPW tool */
4338 } else if (gMacPerl_AlwaysExtract) {
4350 PL_uid = PerlProc_getuid();
4351 PL_euid = PerlProc_geteuid();
4352 PL_gid = PerlProc_getgid();
4353 PL_egid = PerlProc_getegid();
4355 PL_uid |= PL_gid << 16;
4356 PL_euid |= PL_egid << 16;
4358 /* Should not happen: */
4359 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4360 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4363 * Should go by suidscript, not uid!=euid: why disallow
4364 * system("ls") in scripts run from setuid things?
4365 * Or, is this run before we check arguments and set suidscript?
4366 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4367 * (We never have suidscript, can we be sure to have fdscript?)
4368 * Or must then go by UID checks? See comments in forbid_setid also.
4372 /* This is used very early in the lifetime of the program,
4373 * before even the options are parsed, so PL_tainting has
4374 * not been initialized properly. */
4376 Perl_doing_taint(int argc, char *argv[], char *envp[])
4378 #ifndef PERL_IMPLICIT_SYS
4379 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4380 * before we have an interpreter-- and the whole point of this
4381 * function is to be called at such an early stage. If you are on
4382 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4383 * "tainted because running with altered effective ids', you'll
4384 * have to add your own checks somewhere in here. The two most
4385 * known samples of 'implicitness' are Win32 and NetWare, neither
4386 * of which has much of concept of 'uids'. */
4387 int uid = PerlProc_getuid();
4388 int euid = PerlProc_geteuid();
4389 int gid = PerlProc_getgid();
4390 int egid = PerlProc_getegid();
4397 if (uid && (euid != uid || egid != gid))
4399 #endif /* !PERL_IMPLICIT_SYS */
4400 /* This is a really primitive check; environment gets ignored only
4401 * if -T are the first chars together; otherwise one gets
4402 * "Too late" message. */
4403 if ( argc > 1 && argv[1][0] == '-'
4404 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4409 /* Passing the flag as a single char rather than a string is a slight space
4410 optimisation. The only message that isn't /^-.$/ is
4411 "program input from stdin", which is substituted in place of '\0', which
4412 could never be a command line flag. */
4414 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4417 char string[3] = "-x";
4418 const char *message = "program input from stdin";
4425 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4426 if (PL_euid != PL_uid)
4427 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4428 if (PL_egid != PL_gid)
4429 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4430 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4432 * Checks for UID/GID above "wrong": why disallow
4433 * perl -e 'print "Hello\n"'
4434 * from within setuid things?? Simply drop them: replaced by
4435 * fdscript/suidscript and #ifdef IAMSUID checks below.
4437 * This may be too late for command-line switches. Will catch those on
4438 * the #! line, after finding the script name and setting up
4439 * fdscript/suidscript. Note that suidperl does not get around to
4440 * parsing (and checking) the switches on the #! line, but checks that
4441 * the two sets are identical.
4443 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4444 * instead, or would that be "too late"? (We never have suidscript, can
4445 * we be sure to have fdscript?)
4447 * Catch things with suidscript (in descendant of suidperl), even with
4448 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4449 * below; but I am paranoid.
4451 * Also see comments about root running a setuid script, elsewhere.
4453 if (suidscript >= 0)
4454 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4456 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4457 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4458 #endif /* IAMSUID */
4462 Perl_init_debugger(pTHX)
4465 HV * const ostash = PL_curstash;
4467 PL_curstash = PL_debstash;
4468 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4470 AvREAL_off(PL_dbargs);
4471 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4472 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4473 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4474 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4475 sv_setiv(PL_DBsingle, 0);
4476 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4477 sv_setiv(PL_DBtrace, 0);
4478 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4479 sv_setiv(PL_DBsignal, 0);
4480 PL_curstash = ostash;
4483 #ifndef STRESS_REALLOC
4484 #define REASONABLE(size) (size)
4486 #define REASONABLE(size) (1) /* unreasonable */
4490 Perl_init_stacks(pTHX)
4493 /* start with 128-item stack and 8K cxstack */
4494 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4495 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4496 PL_curstackinfo->si_type = PERLSI_MAIN;
4497 PL_curstack = PL_curstackinfo->si_stack;
4498 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4500 PL_stack_base = AvARRAY(PL_curstack);
4501 PL_stack_sp = PL_stack_base;
4502 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4504 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4507 PL_tmps_max = REASONABLE(128);
4509 Newx(PL_markstack,REASONABLE(32),I32);
4510 PL_markstack_ptr = PL_markstack;
4511 PL_markstack_max = PL_markstack + REASONABLE(32);
4515 Newx(PL_scopestack,REASONABLE(32),I32);
4516 PL_scopestack_ix = 0;
4517 PL_scopestack_max = REASONABLE(32);
4519 Newx(PL_savestack,REASONABLE(128),ANY);
4520 PL_savestack_ix = 0;
4521 PL_savestack_max = REASONABLE(128);
4530 while (PL_curstackinfo->si_next)
4531 PL_curstackinfo = PL_curstackinfo->si_next;
4532 while (PL_curstackinfo) {
4533 PERL_SI *p = PL_curstackinfo->si_prev;
4534 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4535 Safefree(PL_curstackinfo->si_cxstack);
4536 Safefree(PL_curstackinfo);
4537 PL_curstackinfo = p;
4539 Safefree(PL_tmps_stack);
4540 Safefree(PL_markstack);
4541 Safefree(PL_scopestack);
4542 Safefree(PL_savestack);
4547 S_init_predump_symbols(pTHX)
4553 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4554 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4555 GvMULTI_on(PL_stdingv);
4556 io = GvIOp(PL_stdingv);
4557 IoTYPE(io) = IoTYPE_RDONLY;
4558 IoIFP(io) = PerlIO_stdin();
4559 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4561 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4563 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4566 IoTYPE(io) = IoTYPE_WRONLY;
4567 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4569 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4573 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4574 GvMULTI_on(PL_stderrgv);
4575 io = GvIOp(PL_stderrgv);
4576 IoTYPE(io) = IoTYPE_WRONLY;
4577 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4578 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4580 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4582 PL_statname = newSV(0); /* last filename we did stat on */
4584 Safefree(PL_osname);
4585 PL_osname = savepv(OSNAME);
4589 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4592 argc--,argv++; /* skip name of script */
4593 if (PL_doswitches) {
4594 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4598 if (argv[0][1] == '-' && !argv[0][2]) {
4602 if ((s = strchr(argv[0], '='))) {
4603 const char *const start_name = argv[0] + 1;
4604 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4605 TRUE, SVt_PV)), s + 1);
4608 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4611 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4612 GvMULTI_on(PL_argvgv);
4613 (void)gv_AVadd(PL_argvgv);
4614 av_clear(GvAVn(PL_argvgv));
4615 for (; argc > 0; argc--,argv++) {
4616 SV * const sv = newSVpv(argv[0],0);
4617 av_push(GvAVn(PL_argvgv),sv);
4618 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4619 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4622 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4623 (void)sv_utf8_decode(sv);
4629 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4634 PL_toptarget = newSV_type(SVt_PVFM);
4635 sv_setpvn(PL_toptarget, "", 0);
4636 PL_bodytarget = newSV_type(SVt_PVFM);
4637 sv_setpvn(PL_bodytarget, "", 0);
4638 PL_formtarget = PL_bodytarget;
4642 init_argv_symbols(argc,argv);
4644 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4645 #ifdef MACOS_TRADITIONAL
4646 /* $0 is not majick on a Mac */
4647 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4649 sv_setpv(GvSV(tmpgv),PL_origfilename);
4650 magicname("0", "0", 1);
4653 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4655 bool env_is_not_environ;
4656 GvMULTI_on(PL_envgv);
4657 hv = GvHVn(PL_envgv);
4658 hv_magic(hv, NULL, PERL_MAGIC_env);
4660 #ifdef USE_ENVIRON_ARRAY
4661 /* Note that if the supplied env parameter is actually a copy
4662 of the global environ then it may now point to free'd memory
4663 if the environment has been modified since. To avoid this
4664 problem we treat env==NULL as meaning 'use the default'
4668 env_is_not_environ = env != environ;
4669 if (env_is_not_environ
4670 # ifdef USE_ITHREADS
4671 && PL_curinterp == aTHX
4680 for (; *env; env++) {
4681 if (!(s = strchr(*env,'=')) || s == *env)
4683 #if defined(MSDOS) && !defined(DJGPP)
4688 sv = newSVpv(s+1, 0);
4689 (void)hv_store(hv, *env, s - *env, sv, 0);
4690 if (env_is_not_environ)
4694 #endif /* USE_ENVIRON_ARRAY */
4695 #endif /* !PERL_MICRO */
4698 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4699 SvREADONLY_off(GvSV(tmpgv));
4700 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4701 SvREADONLY_on(GvSV(tmpgv));
4703 #ifdef THREADS_HAVE_PIDS
4704 PL_ppid = (IV)getppid();
4707 /* touch @F array to prevent spurious warnings 20020415 MJD */
4709 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4714 S_init_perllib(pTHX)
4720 s = PerlEnv_getenv("PERL5LIB");
4722 * It isn't possible to delete an environment variable with
4723 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4724 * case we treat PERL5LIB as undefined if it has a zero-length value.
4726 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4727 if (s && *s != '\0')
4731 incpush(s, TRUE, TRUE, TRUE, FALSE);
4733 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4735 /* Treat PERL5?LIB as a possible search list logical name -- the
4736 * "natural" VMS idiom for a Unix path string. We allow each
4737 * element to be a set of |-separated directories for compatibility.
4741 if (my_trnlnm("PERL5LIB",buf,0))
4742 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4744 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4748 /* Use the ~-expanded versions of APPLLIB (undocumented),
4749 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4752 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4756 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4758 #ifdef MACOS_TRADITIONAL
4761 SV * privdir = newSV(0);
4762 char * macperl = PerlEnv_getenv("MACPERL");
4767 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4768 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4769 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4770 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4771 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4772 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4774 SvREFCNT_dec(privdir);
4777 incpush(":", FALSE, FALSE, TRUE, FALSE);
4780 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4783 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4785 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4789 /* sitearch is always relative to sitelib on Windows for
4790 * DLL-based path intuition to work correctly */
4791 # if !defined(WIN32)
4792 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4798 /* this picks up sitearch as well */
4799 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4801 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4805 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4806 /* Search for version-specific dirs below here */
4807 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4810 #ifdef PERL_VENDORARCH_EXP
4811 /* vendorarch is always relative to vendorlib on Windows for
4812 * DLL-based path intuition to work correctly */
4813 # if !defined(WIN32)
4814 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4818 #ifdef PERL_VENDORLIB_EXP
4820 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4822 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4826 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4827 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4830 #ifdef PERL_OTHERLIBDIRS
4831 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4835 incpush(".", FALSE, FALSE, TRUE, FALSE);
4836 #endif /* MACOS_TRADITIONAL */
4839 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4840 # define PERLLIB_SEP ';'
4843 # define PERLLIB_SEP '|'
4845 # if defined(MACOS_TRADITIONAL)
4846 # define PERLLIB_SEP ','
4848 # define PERLLIB_SEP ':'
4852 #ifndef PERLLIB_MANGLE
4853 # define PERLLIB_MANGLE(s,n) (s)
4856 /* Push a directory onto @INC if it exists.
4857 Generate a new SV if we do this, to save needing to copy the SV we push
4860 S_incpush_if_exists(pTHX_ SV *dir)
4864 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4865 S_ISDIR(tmpstatbuf.st_mode)) {
4866 av_push(GvAVn(PL_incgv), dir);
4873 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4878 const char *p = dir;
4883 if (addsubdirs || addoldvers) {
4887 /* Break at all separators */
4889 SV *libdir = newSV(0);
4892 /* skip any consecutive separators */
4894 while ( *p == PERLLIB_SEP ) {
4895 /* Uncomment the next line for PATH semantics */
4896 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4901 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4902 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4907 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4908 p = NULL; /* break out */
4910 #ifdef MACOS_TRADITIONAL
4911 if (!strchr(SvPVX(libdir), ':')) {
4914 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4916 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4917 sv_catpvs(libdir, ":");
4920 /* Do the if() outside the #ifdef to avoid warnings about an unused
4923 #ifdef PERL_RELOCATABLE_INC
4925 * Relocatable include entries are marked with a leading .../
4928 * 0: Remove that leading ".../"
4929 * 1: Remove trailing executable name (anything after the last '/')
4930 * from the perl path to give a perl prefix
4932 * While the @INC element starts "../" and the prefix ends with a real
4933 * directory (ie not . or ..) chop that real directory off the prefix
4934 * and the leading "../" from the @INC element. ie a logical "../"
4936 * Finally concatenate the prefix and the remainder of the @INC element
4937 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4938 * generates /usr/local/lib/perl5
4940 const char *libpath = SvPVX(libdir);
4941 STRLEN libpath_len = SvCUR(libdir);
4942 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4944 SV * const caret_X = get_sv("\030", 0);
4945 /* Going to use the SV just as a scratch buffer holding a C
4951 /* $^X is *the* source of taint if tainting is on, hence
4952 SvPOK() won't be true. */
4954 assert(SvPOKp(caret_X));
4955 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4956 /* Firstly take off the leading .../
4957 If all else fail we'll do the paths relative to the current
4959 sv_chop(libdir, libpath + 4);
4960 /* Don't use SvPV as we're intentionally bypassing taining,
4961 mortal copies that the mg_get of tainting creates, and
4962 corruption that seems to come via the save stack.
4963 I guess that the save stack isn't correctly set up yet. */
4964 libpath = SvPVX(libdir);
4965 libpath_len = SvCUR(libdir);
4967 /* This would work more efficiently with memrchr, but as it's
4968 only a GNU extension we'd need to probe for it and
4969 implement our own. Not hard, but maybe not worth it? */
4971 prefix = SvPVX(prefix_sv);
4972 lastslash = strrchr(prefix, '/');
4974 /* First time in with the *lastslash = '\0' we just wipe off
4975 the trailing /perl from (say) /usr/foo/bin/perl
4979 while ((*lastslash = '\0'), /* Do that, come what may. */
4980 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4981 && (lastslash = strrchr(prefix, '/')))) {
4982 if (lastslash[1] == '\0'
4983 || (lastslash[1] == '.'
4984 && (lastslash[2] == '/' /* ends "/." */
4985 || (lastslash[2] == '/'
4986 && lastslash[3] == '/' /* or "/.." */
4988 /* Prefix ends "/" or "/." or "/..", any of which
4989 are fishy, so don't do any more logical cleanup.
4993 /* Remove leading "../" from path */
4996 /* Next iteration round the loop removes the last
4997 directory name from prefix by writing a '\0' in
4998 the while clause. */
5000 /* prefix has been terminated with a '\0' to the correct
5001 length. libpath points somewhere into the libdir SV.
5002 We need to join the 2 with '/' and drop the result into
5004 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
5005 SvREFCNT_dec(libdir);
5006 /* And this is the new libdir. */
5009 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5010 /* Need to taint reloccated paths if running set ID */
5011 SvTAINTED_on(libdir);
5014 SvREFCNT_dec(prefix_sv);
5019 * BEFORE pushing libdir onto @INC we may first push version- and
5020 * archname-specific sub-directories.
5022 if (addsubdirs || addoldvers) {
5023 #ifdef PERL_INC_VERSION_LIST
5024 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5025 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5026 const char * const *incver;
5032 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5034 while (unix[len-1] == '/') len--; /* Cosmetic */
5035 sv_usepvn(libdir,unix,len);
5038 PerlIO_printf(Perl_error_log,
5039 "Failed to unixify @INC element \"%s\"\n",
5043 #ifdef MACOS_TRADITIONAL
5044 #define PERL_AV_SUFFIX_FMT ""
5045 #define PERL_ARCH_FMT "%s:"
5046 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5048 #define PERL_AV_SUFFIX_FMT "/"
5049 #define PERL_ARCH_FMT "/%s"
5050 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5052 /* .../version/archname if -d .../version/archname */
5053 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5055 (int)PERL_REVISION, (int)PERL_VERSION,
5056 (int)PERL_SUBVERSION, ARCHNAME);
5057 subdir = S_incpush_if_exists(aTHX_ subdir);
5059 /* .../version if -d .../version */
5060 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5062 (int)PERL_REVISION, (int)PERL_VERSION,
5063 (int)PERL_SUBVERSION);
5064 subdir = S_incpush_if_exists(aTHX_ subdir);
5066 /* .../archname if -d .../archname */
5067 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5068 SVfARG(libdir), ARCHNAME);
5069 subdir = S_incpush_if_exists(aTHX_ subdir);
5073 #ifdef PERL_INC_VERSION_LIST
5075 for (incver = incverlist; *incver; incver++) {
5076 /* .../xxx if -d .../xxx */
5077 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5078 SVfARG(libdir), *incver);
5079 subdir = S_incpush_if_exists(aTHX_ subdir);
5085 /* finally push this lib directory on the end of @INC */
5086 av_push(GvAVn(PL_incgv), libdir);
5089 assert (SvREFCNT(subdir) == 1);
5090 SvREFCNT_dec(subdir);
5096 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5100 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5106 while (av_len(paramList) >= 0) {
5107 cv = (CV*)av_shift(paramList);
5109 if (paramList == PL_beginav) {
5110 /* save PL_beginav for compiler */
5111 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5113 else if (paramList == PL_checkav) {
5114 /* save PL_checkav for compiler */
5115 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5117 else if (paramList == PL_unitcheckav) {
5118 /* save PL_unitcheckav for compiler */
5119 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5130 PL_madskills |= 16384;
5135 PL_madskills &= ~16384;
5138 (void)SvPV_const(atsv, len);
5140 PL_curcop = &PL_compiling;
5141 CopLINE_set(PL_curcop, oldline);
5142 if (paramList == PL_beginav)
5143 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5145 Perl_sv_catpvf(aTHX_ atsv,
5146 "%s failed--call queue aborted",
5147 paramList == PL_checkav ? "CHECK"
5148 : paramList == PL_initav ? "INIT"
5149 : paramList == PL_unitcheckav ? "UNITCHECK"
5151 while (PL_scopestack_ix > oldscope)
5154 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5161 /* my_exit() was called */
5162 while (PL_scopestack_ix > oldscope)
5165 PL_curstash = PL_defstash;
5166 PL_curcop = &PL_compiling;
5167 CopLINE_set(PL_curcop, oldline);
5169 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5170 if (paramList == PL_beginav)
5171 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5173 Perl_croak(aTHX_ "%s failed--call queue aborted",
5174 paramList == PL_checkav ? "CHECK"
5175 : paramList == PL_initav ? "INIT"
5176 : paramList == PL_unitcheckav ? "UNITCHECK"
5183 PL_curcop = &PL_compiling;
5184 CopLINE_set(PL_curcop, oldline);
5187 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5196 Perl_my_exit(pTHX_ U32 status)
5199 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5200 (void*)thr, (unsigned long) status));
5209 STATUS_EXIT_SET(status);
5216 Perl_my_failure_exit(pTHX)
5220 /* We have been called to fall on our sword. The desired exit code
5221 * should be already set in STATUS_UNIX, but could be shifted over
5222 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5225 * If an error code has not been set, then force the issue.
5227 if (MY_POSIX_EXIT) {
5229 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5230 * the exit code when there isn't an error.
5233 if (STATUS_UNIX == 0)
5234 STATUS_UNIX_EXIT_SET(255);
5236 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5238 /* The exit code could have been set by $? or vmsish which
5239 * means that it may not be fatal. So convert
5240 * success/warning codes to fatal.
5242 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5243 STATUS_UNIX_EXIT_SET(255);
5247 /* Traditionally Perl on VMS always expects a Fatal Error. */
5248 if (vaxc$errno & 1) {
5250 /* So force success status to failure */
5251 if (STATUS_NATIVE & 1)
5256 STATUS_UNIX = EINTR; /* In case something cares */
5261 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5263 /* Encode the severity code */
5264 severity = STATUS_NATIVE & STS$M_SEVERITY;
5265 STATUS_UNIX = (severity ? severity : 1) << 8;
5267 /* Perl expects this to be a fatal error */
5268 if (severity != STS$K_SEVERE)
5277 STATUS_UNIX_SET(errno);
5279 exitstatus = STATUS_UNIX >> 8;
5280 if (exitstatus & 255)
5281 STATUS_UNIX_SET(exitstatus);
5283 STATUS_UNIX_SET(255);
5290 S_my_exit_jump(pTHX)
5295 SvREFCNT_dec(PL_e_script);
5299 POPSTACK_TO(PL_mainstack);
5307 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5310 const char * const p = SvPVX_const(PL_e_script);
5311 const char *nl = strchr(p, '\n');
5313 PERL_UNUSED_ARG(idx);
5314 PERL_UNUSED_ARG(maxlen);
5316 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5318 filter_del(read_e_script);
5321 sv_catpvn(buf_sv, p, nl-p);
5322 sv_chop(PL_e_script, nl);
5328 * c-indentation-style: bsd
5330 * indent-tabs-mode: t
5333 * ex: set ts=8 sts=4 sw=4 noet:
https://perl5.git.perl.org / perl5.git / blob