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)
190 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
191 PERL_UNUSED_ARG(argv);
192 PERL_SYS_INIT_BODY(argc, argv);
196 Perl_sys_init3(int* argc, char*** argv, char*** env)
198 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
199 PERL_UNUSED_ARG(argv);
200 PERL_UNUSED_ARG(env);
201 PERL_SYS_INIT3_BODY(argc, argv, env);
207 if (!PL_veto_cleanup) {
208 PERL_SYS_TERM_BODY();
213 #ifdef PERL_IMPLICIT_SYS
215 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
216 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
217 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
218 struct IPerlDir* ipD, struct IPerlSock* ipS,
219 struct IPerlProc* ipP)
221 PerlInterpreter *my_perl;
222 /* Newx() needs interpreter, so call malloc() instead */
223 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
224 S_init_tls_and_interp(my_perl);
225 Zero(my_perl, 1, PerlInterpreter);
235 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
242 =head1 Embedding Functions
244 =for apidoc perl_alloc
246 Allocates a new Perl interpreter. See L<perlembed>.
254 PerlInterpreter *my_perl;
256 /* Newx() needs interpreter, so call malloc() instead */
257 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
259 S_init_tls_and_interp(my_perl);
260 #ifndef PERL_TRACK_MEMPOOL
261 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
263 Zero(my_perl, 1, PerlInterpreter);
264 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
268 #endif /* PERL_IMPLICIT_SYS */
271 =for apidoc perl_construct
273 Initializes a new Perl interpreter. See L<perlembed>.
279 perl_construct(pTHXx)
282 PERL_UNUSED_ARG(my_perl);
285 PL_perl_destruct_level = 1;
287 if (PL_perl_destruct_level > 0)
290 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
292 /* set read-only and try to insure than we wont see REFCNT==0
295 SvREADONLY_on(&PL_sv_undef);
296 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
298 sv_setpv(&PL_sv_no,PL_No);
299 /* value lookup in void context - happens to have the side effect
300 of caching the numeric forms. */
303 SvREADONLY_on(&PL_sv_no);
304 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
306 sv_setpv(&PL_sv_yes,PL_Yes);
309 SvREADONLY_on(&PL_sv_yes);
310 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
312 SvREADONLY_on(&PL_sv_placeholder);
313 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
315 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
316 #ifdef PERL_USES_PL_PIDSTATUS
317 PL_pidstatus = newHV();
320 PL_rs = newSVpvs("\n");
330 SET_NUMERIC_STANDARD();
332 #if defined(LOCAL_PATCH_COUNT)
333 PL_localpatches = local_patches; /* For possible -v */
336 #ifdef HAVE_INTERP_INTERN
340 PerlIO_init(aTHX); /* Hook to IO system */
342 PL_fdpid = newAV(); /* for remembering popen pids by fd */
343 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
344 PL_errors = newSVpvs("");
345 sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */
346 sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */
347 sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */
349 /* First entry is an array of empty elements */
350 Perl_av_create_and_push(aTHX_ &PL_regex_padav,(SV*)newAV());
351 PL_regex_pad = AvARRAY(PL_regex_padav);
353 #ifdef USE_REENTRANT_API
354 Perl_reentrant_init(aTHX);
357 /* Note that strtab is a rather special HV. Assumptions are made
358 about not iterating on it, and not adding tie magic to it.
359 It is properly deallocated in perl_destruct() */
362 HvSHAREKEYS_off(PL_strtab); /* mandatory */
363 hv_ksplit(PL_strtab, 512);
365 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
366 _dyld_lookup_and_bind
367 ("__environ", (unsigned long *) &environ_pointer, NULL);
371 # ifdef USE_ENVIRON_ARRAY
372 PL_origenviron = environ;
376 /* Use sysconf(_SC_CLK_TCK) if available, if not
377 * available or if the sysconf() fails, use the HZ.
378 * BeOS has those, but returns the wrong value.
379 * The HZ if not originally defined has been by now
380 * been defined as CLK_TCK, if available. */
381 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
382 PL_clocktick = sysconf(_SC_CLK_TCK);
383 if (PL_clocktick <= 0)
387 PL_stashcache = newHV();
389 PL_patchlevel = Perl_newSVpvf(aTHX_ "v%d.%d.%d", (int)PERL_REVISION,
390 (int)PERL_VERSION, (int)PERL_SUBVERSION);
393 if (!PL_mmap_page_size) {
394 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
396 SETERRNO(0, SS_NORMAL);
398 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
400 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
402 if ((long) PL_mmap_page_size < 0) {
404 SV * const error = ERRSV;
405 SvUPGRADE(error, SVt_PV);
406 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
409 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
413 # ifdef HAS_GETPAGESIZE
414 PL_mmap_page_size = getpagesize();
416 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
417 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
421 if (PL_mmap_page_size <= 0)
422 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
423 (IV) PL_mmap_page_size);
425 #endif /* HAS_MMAP */
427 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
428 PL_timesbase.tms_utime = 0;
429 PL_timesbase.tms_stime = 0;
430 PL_timesbase.tms_cutime = 0;
431 PL_timesbase.tms_cstime = 0;
438 =for apidoc nothreadhook
440 Stub that provides thread hook for perl_destruct when there are
447 Perl_nothreadhook(pTHX)
453 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
455 Perl_dump_sv_child(pTHX_ SV *sv)
458 const int sock = PL_dumper_fd;
459 const int debug_fd = PerlIO_fileno(Perl_debug_log);
460 union control_un control;
463 struct cmsghdr *cmptr;
465 unsigned char buffer[256];
467 if(sock == -1 || debug_fd == -1)
470 PerlIO_flush(Perl_debug_log);
472 /* All these shenanigans are to pass a file descriptor over to our child for
473 it to dump out to. We can't let it hold open the file descriptor when it
474 forks, as the file descriptor it will dump to can turn out to be one end
475 of pipe that some other process will wait on for EOF. (So as it would
476 be open, the wait would be forever.) */
478 msg.msg_control = control.control;
479 msg.msg_controllen = sizeof(control.control);
480 /* We're a connected socket so we don't need a destination */
486 cmptr = CMSG_FIRSTHDR(&msg);
487 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
488 cmptr->cmsg_level = SOL_SOCKET;
489 cmptr->cmsg_type = SCM_RIGHTS;
490 *((int *)CMSG_DATA(cmptr)) = 1;
492 vec[0].iov_base = (void*)&sv;
493 vec[0].iov_len = sizeof(sv);
494 got = sendmsg(sock, &msg, 0);
497 perror("Debug leaking scalars parent sendmsg failed");
500 if(got < sizeof(sv)) {
501 perror("Debug leaking scalars parent short sendmsg");
505 /* Return protocol is
507 unsigned char: length of location string (0 for empty)
508 unsigned char*: string (not terminated)
510 vec[0].iov_base = (void*)&returned_errno;
511 vec[0].iov_len = sizeof(returned_errno);
512 vec[1].iov_base = buffer;
515 got = readv(sock, vec, 2);
518 perror("Debug leaking scalars parent read failed");
519 PerlIO_flush(PerlIO_stderr());
522 if(got < sizeof(returned_errno) + 1) {
523 perror("Debug leaking scalars parent short read");
524 PerlIO_flush(PerlIO_stderr());
529 got = read(sock, buffer + 1, *buffer);
531 perror("Debug leaking scalars parent read 2 failed");
532 PerlIO_flush(PerlIO_stderr());
537 perror("Debug leaking scalars parent short read 2");
538 PerlIO_flush(PerlIO_stderr());
543 if (returned_errno || *buffer) {
544 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
545 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
546 returned_errno, strerror(returned_errno));
552 =for apidoc perl_destruct
554 Shuts down a Perl interpreter. See L<perlembed>.
563 VOL int destruct_level; /* 0=none, 1=full, 2=full with checks */
565 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
569 PERL_UNUSED_ARG(my_perl);
571 /* wait for all pseudo-forked children to finish */
572 PERL_WAIT_FOR_CHILDREN;
574 destruct_level = PL_perl_destruct_level;
577 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
579 const int i = atoi(s);
580 if (destruct_level < i)
586 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
592 if (PL_endav && !PL_minus_c)
593 call_list(PL_scopestack_ix, PL_endav);
599 /* Need to flush since END blocks can produce output */
602 if (CALL_FPTR(PL_threadhook)(aTHX)) {
603 /* Threads hook has vetoed further cleanup */
604 PL_veto_cleanup = TRUE;
608 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
609 if (destruct_level != 0) {
610 /* Fork here to create a child. Our child's job is to preserve the
611 state of scalars prior to destruction, so that we can instruct it
612 to dump any scalars that we later find have leaked.
613 There's no subtlety in this code - it assumes POSIX, and it doesn't
617 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
618 perror("Debug leaking scalars socketpair failed");
624 perror("Debug leaking scalars fork failed");
628 /* We are the child */
629 const int sock = fd[1];
630 const int debug_fd = PerlIO_fileno(Perl_debug_log);
633 /* Our success message is an integer 0, and a char 0 */
634 static const char success[sizeof(int) + 1];
638 /* We need to close all other file descriptors otherwise we end up
639 with interesting hangs, where the parent closes its end of a
640 pipe, and sits waiting for (another) child to terminate. Only
641 that child never terminates, because it never gets EOF, because
642 we also have the far end of the pipe open. We even need to
643 close the debugging fd, because sometimes it happens to be one
644 end of a pipe, and a process is waiting on the other end for
645 EOF. Normally it would be closed at some point earlier in
646 destruction, but if we happen to cause the pipe to remain open,
647 EOF never occurs, and we get an infinite hang. Hence all the
648 games to pass in a file descriptor if it's actually needed. */
650 f = sysconf(_SC_OPEN_MAX);
652 where = "sysconf failed";
663 union control_un control;
666 struct cmsghdr *cmptr;
670 msg.msg_control = control.control;
671 msg.msg_controllen = sizeof(control.control);
672 /* We're a connected socket so we don't need a source */
676 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
678 vec[0].iov_base = (void*)⌖
679 vec[0].iov_len = sizeof(target);
681 got = recvmsg(sock, &msg, 0);
686 where = "recv failed";
689 if(got < sizeof(target)) {
690 where = "short recv";
694 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
698 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
699 where = "wrong cmsg_len";
702 if(cmptr->cmsg_level != SOL_SOCKET) {
703 where = "wrong cmsg_level";
706 if(cmptr->cmsg_type != SCM_RIGHTS) {
707 where = "wrong cmsg_type";
711 got_fd = *(int*)CMSG_DATA(cmptr);
712 /* For our last little bit of trickery, put the file descriptor
713 back into Perl_debug_log, as if we never actually closed it
715 if(got_fd != debug_fd) {
716 if (dup2(got_fd, debug_fd) == -1) {
723 PerlIO_flush(Perl_debug_log);
725 got = write(sock, &success, sizeof(success));
728 where = "write failed";
731 if(got < sizeof(success)) {
732 where = "short write";
739 int send_errno = errno;
740 unsigned char length = (unsigned char) strlen(where);
741 struct iovec failure[3] = {
742 {(void*)&send_errno, sizeof(send_errno)},
744 {(void*)where, length}
746 int got = writev(sock, failure, 3);
747 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
748 in the parent if we try to read from the socketpair after the
749 child has exited, even if there was data to read.
750 So sleep a bit to give the parent a fighting chance of
753 _exit((got == -1) ? errno : 0);
757 PL_dumper_fd = fd[0];
762 /* We must account for everything. */
764 /* Destroy the main CV and syntax tree */
765 /* Do this now, because destroying ops can cause new SVs to be generated
766 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
767 PL_curcop to point to a valid op from which the filename structure
769 PL_curcop = &PL_compiling;
771 /* ensure comppad/curpad to refer to main's pad */
772 if (CvPADLIST(PL_main_cv)) {
773 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
775 op_free(PL_main_root);
778 PL_main_start = NULL;
779 SvREFCNT_dec(PL_main_cv);
783 /* Tell PerlIO we are about to tear things apart in case
784 we have layers which are using resources that should
788 PerlIO_destruct(aTHX);
790 if (PL_sv_objcount) {
792 * Try to destruct global references. We do this first so that the
793 * destructors and destructees still exist. Some sv's might remain.
794 * Non-referenced objects are on their own.
798 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
799 PL_defoutgv = NULL; /* may have been freed */
802 /* unhook hooks which will soon be, or use, destroyed data */
803 SvREFCNT_dec(PL_warnhook);
805 SvREFCNT_dec(PL_diehook);
808 /* call exit list functions */
809 while (PL_exitlistlen-- > 0)
810 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
812 Safefree(PL_exitlist);
817 /* jettison our possibly duplicated environment */
818 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
819 * so we certainly shouldn't free it here
822 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
823 if (environ != PL_origenviron && !PL_use_safe_putenv
825 /* only main thread can free environ[0] contents */
826 && PL_curinterp == aTHX
832 for (i = 0; environ[i]; i++)
833 safesysfree(environ[i]);
835 /* Must use safesysfree() when working with environ. */
836 safesysfree(environ);
838 environ = PL_origenviron;
841 #endif /* !PERL_MICRO */
843 if (destruct_level == 0) {
845 DEBUG_P(debprofdump());
847 #if defined(PERLIO_LAYERS)
848 /* No more IO - including error messages ! */
849 PerlIO_cleanup(aTHX);
852 CopFILE_free(&PL_compiling);
853 CopSTASH_free(&PL_compiling);
855 /* The exit() function will do everything that needs doing. */
859 /* reset so print() ends up where we expect */
863 /* the syntax tree is shared between clones
864 * so op_free(PL_main_root) only ReREFCNT_dec's
865 * REGEXPs in the parent interpreter
866 * we need to manually ReREFCNT_dec for the clones
869 I32 i = AvFILLp(PL_regex_padav) + 1;
870 SV * const * const ary = AvARRAY(PL_regex_padav);
873 SV * const resv = ary[--i];
875 if (SvFLAGS(resv) & SVf_BREAK) {
876 /* this is PL_reg_curpm, already freed
877 * flag is set in regexec.c:S_regtry
879 SvFLAGS(resv) &= ~SVf_BREAK;
881 else if(SvREPADTMP(resv)) {
882 SvREPADTMP_off(resv);
884 else if(SvIOKp(resv)) {
885 REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv));
890 SvREFCNT_dec(PL_regex_padav);
891 PL_regex_padav = NULL;
895 SvREFCNT_dec((SV*) PL_stashcache);
896 PL_stashcache = NULL;
898 /* loosen bonds of global variables */
900 /* XXX can PL_parser still be non-null here? */
901 if(PL_parser && PL_parser->rsfp) {
902 (void)PerlIO_close(PL_parser->rsfp);
903 PL_parser->rsfp = NULL;
907 Safefree(PL_splitstr);
912 PL_preprocess = FALSE;
918 PL_doswitches = FALSE;
919 PL_dowarn = G_WARN_OFF;
920 PL_doextract = FALSE;
921 PL_sawampersand = FALSE; /* must save all match strings */
924 Safefree(PL_inplace);
926 SvREFCNT_dec(PL_patchlevel);
929 SvREFCNT_dec(PL_e_script);
935 /* magical thingies */
937 SvREFCNT_dec(PL_ofs_sv); /* $, */
940 SvREFCNT_dec(PL_ors_sv); /* $\ */
943 SvREFCNT_dec(PL_rs); /* $/ */
946 Safefree(PL_osname); /* $^O */
949 SvREFCNT_dec(PL_statname);
953 /* defgv, aka *_ should be taken care of elsewhere */
955 /* clean up after study() */
956 SvREFCNT_dec(PL_lastscream);
957 PL_lastscream = NULL;
958 Safefree(PL_screamfirst);
960 Safefree(PL_screamnext);
964 Safefree(PL_efloatbuf);
968 /* startup and shutdown function lists */
969 SvREFCNT_dec(PL_beginav);
970 SvREFCNT_dec(PL_beginav_save);
971 SvREFCNT_dec(PL_endav);
972 SvREFCNT_dec(PL_checkav);
973 SvREFCNT_dec(PL_checkav_save);
974 SvREFCNT_dec(PL_unitcheckav);
975 SvREFCNT_dec(PL_unitcheckav_save);
976 SvREFCNT_dec(PL_initav);
978 PL_beginav_save = NULL;
981 PL_checkav_save = NULL;
982 PL_unitcheckav = NULL;
983 PL_unitcheckav_save = NULL;
986 /* shortcuts just get cleared */
995 PL_last_in_gv = NULL;
1007 SvREFCNT_dec(PL_argvout_stack);
1008 PL_argvout_stack = NULL;
1010 SvREFCNT_dec(PL_modglobal);
1011 PL_modglobal = NULL;
1012 SvREFCNT_dec(PL_preambleav);
1013 PL_preambleav = NULL;
1014 SvREFCNT_dec(PL_subname);
1016 #ifdef PERL_USES_PL_PIDSTATUS
1017 SvREFCNT_dec(PL_pidstatus);
1018 PL_pidstatus = NULL;
1020 SvREFCNT_dec(PL_toptarget);
1021 PL_toptarget = NULL;
1022 SvREFCNT_dec(PL_bodytarget);
1023 PL_bodytarget = NULL;
1024 PL_formtarget = NULL;
1026 /* free locale stuff */
1027 #ifdef USE_LOCALE_COLLATE
1028 Safefree(PL_collation_name);
1029 PL_collation_name = NULL;
1032 #ifdef USE_LOCALE_NUMERIC
1033 Safefree(PL_numeric_name);
1034 PL_numeric_name = NULL;
1035 SvREFCNT_dec(PL_numeric_radix_sv);
1036 PL_numeric_radix_sv = NULL;
1039 /* clear utf8 character classes */
1040 SvREFCNT_dec(PL_utf8_alnum);
1041 SvREFCNT_dec(PL_utf8_alnumc);
1042 SvREFCNT_dec(PL_utf8_ascii);
1043 SvREFCNT_dec(PL_utf8_alpha);
1044 SvREFCNT_dec(PL_utf8_space);
1045 SvREFCNT_dec(PL_utf8_cntrl);
1046 SvREFCNT_dec(PL_utf8_graph);
1047 SvREFCNT_dec(PL_utf8_digit);
1048 SvREFCNT_dec(PL_utf8_upper);
1049 SvREFCNT_dec(PL_utf8_lower);
1050 SvREFCNT_dec(PL_utf8_print);
1051 SvREFCNT_dec(PL_utf8_punct);
1052 SvREFCNT_dec(PL_utf8_xdigit);
1053 SvREFCNT_dec(PL_utf8_mark);
1054 SvREFCNT_dec(PL_utf8_toupper);
1055 SvREFCNT_dec(PL_utf8_totitle);
1056 SvREFCNT_dec(PL_utf8_tolower);
1057 SvREFCNT_dec(PL_utf8_tofold);
1058 SvREFCNT_dec(PL_utf8_idstart);
1059 SvREFCNT_dec(PL_utf8_idcont);
1060 PL_utf8_alnum = NULL;
1061 PL_utf8_alnumc = NULL;
1062 PL_utf8_ascii = NULL;
1063 PL_utf8_alpha = NULL;
1064 PL_utf8_space = NULL;
1065 PL_utf8_cntrl = NULL;
1066 PL_utf8_graph = NULL;
1067 PL_utf8_digit = NULL;
1068 PL_utf8_upper = NULL;
1069 PL_utf8_lower = NULL;
1070 PL_utf8_print = NULL;
1071 PL_utf8_punct = NULL;
1072 PL_utf8_xdigit = NULL;
1073 PL_utf8_mark = NULL;
1074 PL_utf8_toupper = NULL;
1075 PL_utf8_totitle = NULL;
1076 PL_utf8_tolower = NULL;
1077 PL_utf8_tofold = NULL;
1078 PL_utf8_idstart = NULL;
1079 PL_utf8_idcont = NULL;
1081 if (!specialWARN(PL_compiling.cop_warnings))
1082 PerlMemShared_free(PL_compiling.cop_warnings);
1083 PL_compiling.cop_warnings = NULL;
1084 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1085 PL_compiling.cop_hints_hash = NULL;
1086 CopFILE_free(&PL_compiling);
1087 CopSTASH_free(&PL_compiling);
1089 /* Prepare to destruct main symbol table. */
1094 SvREFCNT_dec(PL_curstname);
1095 PL_curstname = NULL;
1097 /* clear queued errors */
1098 SvREFCNT_dec(PL_errors);
1101 SvREFCNT_dec(PL_isarev);
1104 if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
1105 if (PL_scopestack_ix != 0)
1106 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1107 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1108 (long)PL_scopestack_ix);
1109 if (PL_savestack_ix != 0)
1110 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1111 "Unbalanced saves: %ld more saves than restores\n",
1112 (long)PL_savestack_ix);
1113 if (PL_tmps_floor != -1)
1114 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1115 (long)PL_tmps_floor + 1);
1116 if (cxstack_ix != -1)
1117 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1118 (long)cxstack_ix + 1);
1121 /* Now absolutely destruct everything, somehow or other, loops or no. */
1122 SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */
1123 SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */
1125 /* the 2 is for PL_fdpid and PL_strtab */
1126 while (PL_sv_count > 2 && sv_clean_all())
1129 SvFLAGS(PL_fdpid) &= ~SVTYPEMASK;
1130 SvFLAGS(PL_fdpid) |= SVt_PVAV;
1131 SvFLAGS(PL_strtab) &= ~SVTYPEMASK;
1132 SvFLAGS(PL_strtab) |= SVt_PVHV;
1134 AvREAL_off(PL_fdpid); /* no surviving entries */
1135 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1138 #ifdef HAVE_INTERP_INTERN
1142 /* Destruct the global string table. */
1144 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1145 * so that sv_free() won't fail on them.
1146 * Now that the global string table is using a single hunk of memory
1147 * for both HE and HEK, we either need to explicitly unshare it the
1148 * correct way, or actually free things here.
1151 const I32 max = HvMAX(PL_strtab);
1152 HE * const * const array = HvARRAY(PL_strtab);
1153 HE *hent = array[0];
1156 if (hent && ckWARN_d(WARN_INTERNAL)) {
1157 HE * const next = HeNEXT(hent);
1158 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1159 "Unbalanced string table refcount: (%ld) for \"%s\"",
1160 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1167 hent = array[riter];
1172 HvARRAY(PL_strtab) = 0;
1173 HvTOTALKEYS(PL_strtab) = 0;
1174 HvFILL(PL_strtab) = 0;
1176 SvREFCNT_dec(PL_strtab);
1179 /* free the pointer tables used for cloning */
1180 ptr_table_free(PL_ptr_table);
1181 PL_ptr_table = (PTR_TBL_t*)NULL;
1184 /* free special SVs */
1186 SvREFCNT(&PL_sv_yes) = 0;
1187 sv_clear(&PL_sv_yes);
1188 SvANY(&PL_sv_yes) = NULL;
1189 SvFLAGS(&PL_sv_yes) = 0;
1191 SvREFCNT(&PL_sv_no) = 0;
1192 sv_clear(&PL_sv_no);
1193 SvANY(&PL_sv_no) = NULL;
1194 SvFLAGS(&PL_sv_no) = 0;
1198 for (i=0; i<=2; i++) {
1199 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1200 sv_clear(PERL_DEBUG_PAD(i));
1201 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1202 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1206 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1207 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1209 #ifdef DEBUG_LEAKING_SCALARS
1210 if (PL_sv_count != 0) {
1215 for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) {
1216 svend = &sva[SvREFCNT(sva)];
1217 for (sv = sva + 1; sv < svend; ++sv) {
1218 if (SvTYPE(sv) != SVTYPEMASK) {
1219 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1221 " refcnt=%"UVuf pTHX__FORMAT "\n"
1222 "\tallocated at %s:%d %s %s%s\n",
1223 (void*)sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE,
1224 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1226 sv->sv_debug_inpad ? "for" : "by",
1227 sv->sv_debug_optype ?
1228 PL_op_name[sv->sv_debug_optype]: "(none)",
1229 sv->sv_debug_cloned ? " (cloned)" : ""
1231 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1232 Perl_dump_sv_child(aTHX_ sv);
1238 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1242 /* Wait for up to 4 seconds for child to terminate.
1243 This seems to be the least effort way of timing out on reaping
1245 struct timeval waitfor = {4, 0};
1246 int sock = PL_dumper_fd;
1250 FD_SET(sock, &rset);
1251 select(sock + 1, &rset, NULL, NULL, &waitfor);
1252 waitpid(child, &status, WNOHANG);
1259 #ifdef PERL_DEBUG_READONLY_OPS
1265 #if defined(PERLIO_LAYERS)
1266 /* No more IO - including error messages ! */
1267 PerlIO_cleanup(aTHX);
1270 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1271 as currently layers use it rather than NULL as a marker
1272 for no arg - and will try and SvREFCNT_dec it.
1274 SvREFCNT(&PL_sv_undef) = 0;
1275 SvREADONLY_off(&PL_sv_undef);
1277 Safefree(PL_origfilename);
1278 PL_origfilename = NULL;
1279 Safefree(PL_reg_start_tmp);
1280 PL_reg_start_tmp = (char**)NULL;
1281 PL_reg_start_tmpl = 0;
1282 Safefree(PL_reg_curpm);
1283 Safefree(PL_reg_poscache);
1284 free_tied_hv_pool();
1285 Safefree(PL_op_mask);
1286 Safefree(PL_psig_ptr);
1287 PL_psig_ptr = (SV**)NULL;
1288 Safefree(PL_psig_name);
1289 PL_psig_name = (SV**)NULL;
1290 Safefree(PL_bitcount);
1292 Safefree(PL_psig_pend);
1293 PL_psig_pend = (int*)NULL;
1296 PL_tainting = FALSE;
1297 PL_taint_warn = FALSE;
1298 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1301 DEBUG_P(debprofdump());
1303 #ifdef USE_REENTRANT_API
1304 Perl_reentrant_free(aTHX);
1309 while (PL_regmatch_slab) {
1310 regmatch_slab *s = PL_regmatch_slab;
1311 PL_regmatch_slab = PL_regmatch_slab->next;
1315 /* As the absolutely last thing, free the non-arena SV for mess() */
1318 /* we know that type == SVt_PVMG */
1320 /* it could have accumulated taint magic */
1323 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1324 moremagic = mg->mg_moremagic;
1325 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1327 Safefree(mg->mg_ptr);
1331 /* we know that type >= SVt_PV */
1332 SvPV_free(PL_mess_sv);
1333 Safefree(SvANY(PL_mess_sv));
1334 Safefree(PL_mess_sv);
1341 =for apidoc perl_free
1343 Releases a Perl interpreter. See L<perlembed>.
1353 if (PL_veto_cleanup)
1356 #ifdef PERL_TRACK_MEMPOOL
1359 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1360 * value as we're probably hunting memory leaks then
1362 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1363 if (!s || atoi(s) == 0) {
1364 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1365 thread at thread exit. */
1366 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1367 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1372 #if defined(WIN32) || defined(NETWARE)
1373 # if defined(PERL_IMPLICIT_SYS)
1376 void *host = nw_internal_host;
1378 void *host = w32_internal_host;
1380 PerlMem_free(aTHXx);
1382 nw_delete_internal_host(host);
1384 win32_delete_internal_host(host);
1388 PerlMem_free(aTHXx);
1391 PerlMem_free(aTHXx);
1395 #if defined(USE_ITHREADS)
1396 /* provide destructors to clean up the thread key when libperl is unloaded */
1397 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1399 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1400 #pragma fini "perl_fini"
1401 #elif defined(__sun) && !defined(__GNUC__)
1402 #pragma fini (perl_fini)
1406 #if defined(__GNUC__)
1407 __attribute__((destructor))
1412 if (PL_curinterp && !PL_veto_cleanup)
1417 #endif /* THREADS */
1420 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1423 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1424 PL_exitlist[PL_exitlistlen].fn = fn;
1425 PL_exitlist[PL_exitlistlen].ptr = ptr;
1429 #ifdef HAS_PROCSELFEXE
1430 /* This is a function so that we don't hold on to MAXPATHLEN
1431 bytes of stack longer than necessary
1434 S_procself_val(pTHX_ SV *sv, const char *arg0)
1436 char buf[MAXPATHLEN];
1437 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1439 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1440 includes a spurious NUL which will cause $^X to fail in system
1441 or backticks (this will prevent extensions from being built and
1442 many tests from working). readlink is not meant to add a NUL.
1443 Normal readlink works fine.
1445 if (len > 0 && buf[len-1] == '\0') {
1449 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1450 returning the text "unknown" from the readlink rather than the path
1451 to the executable (or returning an error from the readlink). Any valid
1452 path has a '/' in it somewhere, so use that to validate the result.
1453 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1455 if (len > 0 && memchr(buf, '/', len)) {
1456 sv_setpvn(sv,buf,len);
1462 #endif /* HAS_PROCSELFEXE */
1465 S_set_caret_X(pTHX) {
1467 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1469 #ifdef HAS_PROCSELFEXE
1470 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1473 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1475 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1482 =for apidoc perl_parse
1484 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1490 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1497 PERL_UNUSED_ARG(my_perl);
1499 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
1502 Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\
1503 setuid perl scripts securely.\n");
1504 #endif /* IAMSUID */
1507 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1508 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1509 * This MUST be done before any hash stores or fetches take place.
1510 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1511 * yourself, it is your responsibility to provide a good random seed!
1512 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1513 if (!PL_rehash_seed_set)
1514 PL_rehash_seed = get_hash_seed();
1516 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1518 if (s && (atoi(s) == 1))
1519 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1521 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1526 if (PL_origalen != 0) {
1527 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1530 /* Set PL_origalen be the sum of the contiguous argv[]
1531 * elements plus the size of the env in case that it is
1532 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1533 * as the maximum modifiable length of $0. In the worst case
1534 * the area we are able to modify is limited to the size of
1535 * the original argv[0]. (See below for 'contiguous', though.)
1537 const char *s = NULL;
1540 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1541 /* Do the mask check only if the args seem like aligned. */
1543 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1545 /* See if all the arguments are contiguous in memory. Note
1546 * that 'contiguous' is a loose term because some platforms
1547 * align the argv[] and the envp[]. If the arguments look
1548 * like non-aligned, assume that they are 'strictly' or
1549 * 'traditionally' contiguous. If the arguments look like
1550 * aligned, we just check that they are within aligned
1551 * PTRSIZE bytes. As long as no system has something bizarre
1552 * like the argv[] interleaved with some other data, we are
1553 * fine. (Did I just evoke Murphy's Law?) --jhi */
1554 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1556 for (i = 1; i < PL_origargc; i++) {
1557 if ((PL_origargv[i] == s + 1
1559 || PL_origargv[i] == s + 2
1564 (PL_origargv[i] > s &&
1566 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1577 #ifndef PERL_USE_SAFE_PUTENV
1578 /* Can we grab env area too to be used as the area for $0? */
1579 if (s && PL_origenviron && !PL_use_safe_putenv) {
1580 if ((PL_origenviron[0] == s + 1)
1583 (PL_origenviron[0] > s &&
1584 PL_origenviron[0] <=
1585 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1588 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1589 s = PL_origenviron[0];
1592 my_setenv("NoNe SuCh", NULL);
1593 /* Force copy of environment. */
1594 for (i = 1; PL_origenviron[i]; i++) {
1595 if (PL_origenviron[i] == s + 1
1598 (PL_origenviron[i] > s &&
1599 PL_origenviron[i] <=
1600 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1603 s = PL_origenviron[i];
1611 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1613 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1618 /* Come here if running an undumped a.out. */
1620 PL_origfilename = savepv(argv[0]);
1621 PL_do_undump = FALSE;
1622 cxstack_ix = -1; /* start label stack again */
1624 assert (!PL_tainted);
1626 S_set_caret_X(aTHX);
1628 init_postdump_symbols(argc,argv,env);
1633 op_free(PL_main_root);
1634 PL_main_root = NULL;
1636 PL_main_start = NULL;
1637 SvREFCNT_dec(PL_main_cv);
1641 oldscope = PL_scopestack_ix;
1642 PL_dowarn = G_WARN_OFF;
1647 parse_body(env,xsinit);
1649 call_list(oldscope, PL_unitcheckav);
1651 call_list(oldscope, PL_checkav);
1658 /* my_exit() was called */
1659 while (PL_scopestack_ix > oldscope)
1662 PL_curstash = PL_defstash;
1664 call_list(oldscope, PL_unitcheckav);
1666 call_list(oldscope, PL_checkav);
1670 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1679 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1683 int argc = PL_origargc;
1684 char **argv = PL_origargv;
1685 const char *scriptname = NULL;
1686 VOL bool dosearch = FALSE;
1687 const char *validarg = "";
1690 const char *cddir = NULL;
1691 #ifdef USE_SITECUSTOMIZE
1692 bool minus_f = FALSE;
1694 SV *linestr_sv = newSV_type(SVt_PVIV);
1695 bool add_read_e_script = FALSE;
1697 SvGROW(linestr_sv, 80);
1698 sv_setpvn(linestr_sv,"",0);
1700 sv = newSVpvs(""); /* first used for -I flags */
1706 for (argc--,argv++; argc > 0; argc--,argv++) {
1707 if (argv[0][0] != '-' || !argv[0][1])
1711 validarg = " PHOOEY ";
1715 * Can we rely on the kernel to start scripts with argv[1] set to
1716 * contain all #! line switches (the whole line)? (argv[0] is set to
1717 * the interpreter name, argv[2] to the script name; argv[3] and
1718 * above may contain other arguments.)
1725 #ifndef PERL_STRICT_CR
1749 if ((s = moreswitches(s)))
1754 CHECK_MALLOC_TOO_LATE_FOR('t');
1755 if( !PL_tainting ) {
1756 PL_taint_warn = TRUE;
1762 CHECK_MALLOC_TOO_LATE_FOR('T');
1764 PL_taint_warn = FALSE;
1772 #ifdef MACOS_TRADITIONAL
1773 /* ignore -e for Dev:Pseudo argument */
1774 if (argv[1] && !strcmp(argv[1], "Dev:Pseudo"))
1777 forbid_setid('e', -1);
1779 PL_e_script = newSVpvs("");
1780 add_read_e_script = TRUE;
1783 sv_catpv(PL_e_script, s);
1785 sv_catpv(PL_e_script, argv[1]);
1789 Perl_croak(aTHX_ "No code specified for -%c", c);
1790 sv_catpvs(PL_e_script, "\n");
1794 #ifdef USE_SITECUSTOMIZE
1800 case 'I': /* -I handled both here and in moreswitches() */
1801 forbid_setid('I', -1);
1802 if (!*++s && (s=argv[1]) != NULL) {
1806 STRLEN len = strlen(s);
1807 const char * const p = savepvn(s, len);
1808 incpush(p, TRUE, TRUE, FALSE, FALSE);
1809 sv_catpvs(sv, "-I");
1810 sv_catpvn(sv, p, len);
1815 Perl_croak(aTHX_ "No directory specified for -I");
1818 forbid_setid('P', -1);
1819 PL_preprocess = TRUE;
1824 forbid_setid('S', -1);
1832 Perl_av_create_and_push(aTHX_ &PL_preambleav, newSVpvs("use Config;"));
1834 /* Can't do newSVpvs() as that would involve pre-processor
1835 condititionals inside a macro expansion. */
1836 opts_prog = Perl_newSVpv(aTHX_ "$_ = join ' ', sort qw("
1843 # ifdef PERL_DONT_CREATE_GVSV
1844 " PERL_DONT_CREATE_GVSV"
1846 # ifdef PERL_MALLOC_WRAP
1849 # ifdef PERL_MEM_LOG
1852 # ifdef PERL_MEM_LOG_ENV
1855 # ifdef PERL_MEM_LOG_ENV_FD
1856 " PERL_MEM_LOG_ENV_FD"
1858 # ifdef PERL_MEM_LOG_STDERR
1859 " PERL_MEM_LOG_STDERR"
1861 # ifdef PERL_MEM_LOG_TIMESTAMP
1862 " PERL_MEM_LOG_TIMESTAMP"
1864 # ifdef PERL_USE_SAFE_PUTENV
1865 " PERL_USE_SAFE_PUTENV"
1867 # ifdef USE_SITECUSTOMIZE
1868 " USE_SITECUSTOMIZE"
1872 sv_catpv(opts_prog, PL_bincompat_options);
1873 /* Terminate the qw(, and then wrap at 76 columns. */
1874 sv_catpvs(opts_prog, "); s/(?=.{53})(.{1,53}) /$1\\n /mg;print Config::myconfig(),");
1876 sv_catpvs(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n");
1878 sv_catpvs(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n");
1881 sv_catpvs(opts_prog," Compile-time options: $_\\n\",");
1883 #if defined(LOCAL_PATCH_COUNT)
1884 if (LOCAL_PATCH_COUNT > 0) {
1886 sv_catpvs(opts_prog,
1887 "\" Locally applied patches:\\n\",");
1888 for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
1889 if (PL_localpatches[i])
1890 Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,",
1891 0, PL_localpatches[i], 0);
1895 Perl_sv_catpvf(aTHX_ opts_prog,
1896 "\" Built under %s\\n",OSNAME);
1899 Perl_sv_catpvf(aTHX_ opts_prog,
1900 " Compiled at %s %s\\n\"",__DATE__,
1903 Perl_sv_catpvf(aTHX_ opts_prog," Compiled on %s\\n\"",
1907 sv_catpvs(opts_prog, "; $\"=\"\\n \"; "
1908 "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } "
1909 "sort grep {/^PERL/} keys %ENV; ");
1911 sv_catpvs(opts_prog,
1912 "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";");
1914 sv_catpvs(opts_prog,
1915 "print \" \\%ENV:\\n @env\\n\" if @env;"
1916 "print \" \\@INC:\\n @INC\\n\";");
1920 opts_prog = Perl_newSVpvf(aTHX_
1921 "Config::config_vars(qw%c%s%c)",
1925 av_push(PL_preambleav, opts_prog);
1926 /* don't look for script or read stdin */
1927 scriptname = BIT_BUCKET;
1931 PL_doextract = TRUE;
1939 if (!*++s || isSPACE(*s)) {
1943 /* catch use of gnu style long options */
1944 if (strEQ(s, "version")) {
1948 if (strEQ(s, "help")) {
1955 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1966 #ifndef SECURE_INTERNAL_GETENV
1969 (s = PerlEnv_getenv("PERL5OPT")))
1971 const char *popt = s;
1974 if (*s == '-' && *(s+1) == 'T') {
1975 CHECK_MALLOC_TOO_LATE_FOR('T');
1977 PL_taint_warn = FALSE;
1980 char *popt_copy = NULL;
1993 if (!strchr("CDIMUdmtw", *s))
1994 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1998 popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0)));
1999 s = popt_copy + (s - popt);
2000 d = popt_copy + (d - popt);
2007 if( !PL_tainting ) {
2008 PL_taint_warn = TRUE;
2019 #ifdef USE_SITECUSTOMIZE
2021 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2022 Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP));
2027 scriptname = argv[0];
2030 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2032 else if (scriptname == NULL) {
2034 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2040 /* Set $^X early so that it can be used for relocatable paths in @INC */
2041 assert (!PL_tainted);
2043 S_set_caret_X(aTHX);
2050 = open_script(scriptname, dosearch, sv, &suidscript, &rsfp);
2052 validate_suid(validarg, scriptname, fdscript, suidscript,
2056 # if defined(SIGCHLD) || defined(SIGCLD)
2059 # define SIGCHLD SIGCLD
2061 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2062 if (sigstate == (Sighandler_t) SIG_IGN) {
2063 if (ckWARN(WARN_SIGNAL))
2064 Perl_warner(aTHX_ packWARN(WARN_SIGNAL),
2065 "Can't ignore signal CHLD, forcing to default");
2066 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2073 #ifdef MACOS_TRADITIONAL
2074 || gMacPerl_AlwaysExtract
2078 /* This will croak if suidscript is >= 0, as -x cannot be used with
2080 forbid_setid('x', suidscript);
2081 /* Hence you can't get here if suidscript >= 0 */
2083 find_beginning(linestr_sv, rsfp);
2084 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2085 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2089 PL_main_cv = PL_compcv = (CV*)newSV_type(SVt_PVCV);
2090 CvUNIQUE_on(PL_compcv);
2092 CvPADLIST(PL_compcv) = pad_new(0);
2094 PL_isarev = newHV();
2097 boot_core_UNIVERSAL();
2098 boot_core_xsutils();
2102 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2104 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2110 # ifdef HAS_SOCKS5_INIT
2111 socks5_init(argv[0]);
2117 init_predump_symbols();
2118 /* init_postdump_symbols not currently designed to be called */
2119 /* more than once (ENV isn't cleared first, for example) */
2120 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2122 init_postdump_symbols(argc,argv,env);
2124 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2125 * or explicitly in some platforms.
2126 * locale.c:Perl_init_i18nl10n() if the environment
2127 * look like the user wants to use UTF-8. */
2128 #if defined(__SYMBIAN32__)
2129 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2132 /* Requires init_predump_symbols(). */
2133 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2138 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2139 * and the default open disciplines. */
2140 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2141 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2143 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2144 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2145 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2147 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2148 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2149 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2151 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2152 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2153 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2155 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2156 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2159 sv_setpvn(sv, ":utf8\0:utf8", 11);
2161 sv_setpvn(sv, ":utf8\0", 6);
2164 sv_setpvn(sv, "\0:utf8", 6);
2172 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2173 if (strEQ(s, "unsafe"))
2174 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2175 else if (strEQ(s, "safe"))
2176 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2178 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2185 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2189 PL_xmlfp = PerlIO_stdout();
2191 PL_xmlfp = PerlIO_open(s, "w");
2193 Perl_croak(aTHX_ "Can't open %s", s);
2195 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2201 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2202 PL_madskills = atoi(s);
2203 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2208 lex_start(linestr_sv, rsfp, TRUE);
2209 PL_subname = newSVpvs("main");
2211 if (add_read_e_script)
2212 filter_add(read_e_script, NULL);
2214 /* now parse the script */
2216 SETERRNO(0,SS_NORMAL);
2217 #ifdef MACOS_TRADITIONAL
2218 if (gMacPerl_SyntaxError = (yyparse() || PL_parser->error_count)) {
2220 Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename));
2222 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2223 MacPerl_MPWFileName(PL_origfilename));
2227 if (yyparse() || PL_parser->error_count) {
2229 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2231 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2236 CopLINE_set(PL_curcop, 0);
2237 PL_curstash = PL_defstash;
2238 PL_preprocess = FALSE;
2240 SvREFCNT_dec(PL_e_script);
2248 SAVECOPFILE(PL_curcop);
2249 SAVECOPLINE(PL_curcop);
2250 gv_check(PL_defstash);
2257 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2258 dump_mstats("after compilation:");
2267 =for apidoc perl_run
2269 Tells a Perl interpreter to run. See L<perlembed>.
2282 PERL_UNUSED_ARG(my_perl);
2284 oldscope = PL_scopestack_ix;
2292 cxstack_ix = -1; /* start context stack again */
2294 case 0: /* normal completion */
2298 case 2: /* my_exit() */
2299 while (PL_scopestack_ix > oldscope)
2302 PL_curstash = PL_defstash;
2303 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2304 PL_endav && !PL_minus_c)
2305 call_list(oldscope, PL_endav);
2307 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2308 dump_mstats("after execution: ");
2314 POPSTACK_TO(PL_mainstack);
2317 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2328 S_run_body(pTHX_ I32 oldscope)
2331 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2332 PL_sawampersand ? "Enabling" : "Omitting"));
2334 if (!PL_restartop) {
2338 exit(0); /* less likely to core dump than my_exit(0) */
2341 DEBUG_x(dump_all());
2344 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2346 DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n",
2350 #ifdef MACOS_TRADITIONAL
2351 PerlIO_printf(Perl_error_log, "%s%s syntax OK\n",
2352 (gMacPerl_ErrorFormat ? "# " : ""),
2353 MacPerl_MPWFileName(PL_origfilename));
2355 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2359 if (PERLDB_SINGLE && PL_DBsingle)
2360 sv_setiv(PL_DBsingle, 1);
2362 call_list(oldscope, PL_initav);
2363 #ifdef PERL_DEBUG_READONLY_OPS
2364 Perl_pending_Slabs_to_ro(aTHX);
2371 PL_op = PL_restartop;
2375 else if (PL_main_start) {
2376 CvDEPTH(PL_main_cv) = 1;
2377 PL_op = PL_main_start;
2385 =head1 SV Manipulation Functions
2387 =for apidoc p||get_sv
2389 Returns the SV of the specified Perl scalar. If C<create> is set and the
2390 Perl variable does not exist then it will be created. If C<create> is not
2391 set and the variable does not exist then NULL is returned.
2397 Perl_get_sv(pTHX_ const char *name, I32 create)
2400 gv = gv_fetchpv(name, create, SVt_PV);
2407 =head1 Array Manipulation Functions
2409 =for apidoc p||get_av
2411 Returns the AV of the specified Perl array. If C<create> is set and the
2412 Perl variable does not exist then it will be created. If C<create> is not
2413 set and the variable does not exist then NULL is returned.
2419 Perl_get_av(pTHX_ const char *name, I32 create)
2421 GV* const gv = gv_fetchpv(name, create, SVt_PVAV);
2430 =head1 Hash Manipulation Functions
2432 =for apidoc p||get_hv
2434 Returns the HV of the specified Perl hash. If C<create> is set and the
2435 Perl variable does not exist then it will be created. If C<create> is not
2436 set and the variable does not exist then NULL is returned.
2442 Perl_get_hv(pTHX_ const char *name, I32 create)
2444 GV* const gv = gv_fetchpv(name, create, SVt_PVHV);
2453 =head1 CV Manipulation Functions
2455 =for apidoc p||get_cvn_flags
2457 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2458 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2459 exist then it will be declared (which has the same effect as saying
2460 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2461 then NULL is returned.
2463 =for apidoc p||get_cv
2465 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2471 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2473 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2474 /* XXX this is probably not what they think they're getting.
2475 * It has the same effect as "sub name;", i.e. just a forward
2477 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2478 SV *const sv = newSVpvn(name,len);
2479 SvFLAGS(sv) |= flags & SVf_UTF8;
2480 return newSUB(start_subparse(FALSE, 0),
2481 newSVOP(OP_CONST, 0, sv),
2490 Perl_get_cv(pTHX_ const char *name, I32 flags)
2492 return get_cvn_flags(name, strlen(name), flags);
2495 /* Be sure to refetch the stack pointer after calling these routines. */
2499 =head1 Callback Functions
2501 =for apidoc p||call_argv
2503 Performs a callback to the specified Perl sub. See L<perlcall>.
2509 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2511 /* See G_* flags in cop.h */
2512 /* null terminated arg list */
2520 XPUSHs(sv_2mortal(newSVpv(*argv,0)));
2525 return call_pv(sub_name, flags);
2529 =for apidoc p||call_pv
2531 Performs a callback to the specified Perl sub. See L<perlcall>.
2537 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2538 /* name of the subroutine */
2539 /* See G_* flags in cop.h */
2541 return call_sv((SV*)get_cv(sub_name, TRUE), flags);
2545 =for apidoc p||call_method
2547 Performs a callback to the specified Perl method. The blessed object must
2548 be on the stack. See L<perlcall>.
2554 Perl_call_method(pTHX_ const char *methname, I32 flags)
2555 /* name of the subroutine */
2556 /* See G_* flags in cop.h */
2558 return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD);
2561 /* May be called with any of a CV, a GV, or an SV containing the name. */
2563 =for apidoc p||call_sv
2565 Performs a callback to the Perl sub whose name is in the SV. See
2572 Perl_call_sv(pTHX_ SV *sv, I32 flags)
2573 /* See G_* flags in cop.h */
2576 LOGOP myop; /* fake syntax tree node */
2581 bool oldcatch = CATCH_GET;
2583 OP* const oldop = PL_op;
2586 if (flags & G_DISCARD) {
2591 Zero(&myop, 1, LOGOP);
2592 myop.op_next = NULL;
2593 if (!(flags & G_NOARGS))
2594 myop.op_flags |= OPf_STACKED;
2595 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2596 (flags & G_ARRAY) ? OPf_WANT_LIST :
2601 EXTEND(PL_stack_sp, 1);
2602 *++PL_stack_sp = sv;
2604 oldscope = PL_scopestack_ix;
2606 if (PERLDB_SUB && PL_curstash != PL_debstash
2607 /* Handle first BEGIN of -d. */
2608 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2609 /* Try harder, since this may have been a sighandler, thus
2610 * curstash may be meaningless. */
2611 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash)
2612 && !(flags & G_NODEBUG))
2613 PL_op->op_private |= OPpENTERSUB_DB;
2615 if (flags & G_METHOD) {
2616 Zero(&method_op, 1, UNOP);
2617 method_op.op_next = PL_op;
2618 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2619 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2620 PL_op = (OP*)&method_op;
2623 if (!(flags & G_EVAL)) {
2625 CALL_BODY_SUB((OP*)&myop);
2626 retval = PL_stack_sp - (PL_stack_base + oldmark);
2627 CATCH_SET(oldcatch);
2630 myop.op_other = (OP*)&myop;
2632 create_eval_scope(flags|G_FAKINGEVAL);
2640 CALL_BODY_SUB((OP*)&myop);
2641 retval = PL_stack_sp - (PL_stack_base + oldmark);
2642 if (!(flags & G_KEEPERR))
2643 sv_setpvn(ERRSV,"",0);
2649 /* my_exit() was called */
2650 PL_curstash = PL_defstash;
2653 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2654 Perl_croak(aTHX_ "Callback called exit");
2659 PL_op = PL_restartop;
2663 PL_stack_sp = PL_stack_base + oldmark;
2664 if (flags & G_ARRAY)
2668 *++PL_stack_sp = &PL_sv_undef;
2673 if (PL_scopestack_ix > oldscope)
2674 delete_eval_scope();
2678 if (flags & G_DISCARD) {
2679 PL_stack_sp = PL_stack_base + oldmark;
2688 /* Eval a string. The G_EVAL flag is always assumed. */
2691 =for apidoc p||eval_sv
2693 Tells Perl to C<eval> the string in the SV.
2699 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2701 /* See G_* flags in cop.h */
2705 UNOP myop; /* fake syntax tree node */
2706 VOL I32 oldmark = SP - PL_stack_base;
2709 OP* const oldop = PL_op;
2712 if (flags & G_DISCARD) {
2719 Zero(PL_op, 1, UNOP);
2720 EXTEND(PL_stack_sp, 1);
2721 *++PL_stack_sp = sv;
2723 if (!(flags & G_NOARGS))
2724 myop.op_flags = OPf_STACKED;
2725 myop.op_next = NULL;
2726 myop.op_type = OP_ENTEREVAL;
2727 myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID :
2728 (flags & G_ARRAY) ? OPf_WANT_LIST :
2730 if (flags & G_KEEPERR)
2731 myop.op_flags |= OPf_SPECIAL;
2733 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2734 * before a PUSHEVAL, which corrupts the stack after a croak */
2735 TAINT_PROPER("eval_sv()");
2741 CALL_BODY_EVAL((OP*)&myop);
2742 retval = PL_stack_sp - (PL_stack_base + oldmark);
2743 if (!(flags & G_KEEPERR))
2744 sv_setpvn(ERRSV,"",0);
2750 /* my_exit() was called */
2751 PL_curstash = PL_defstash;
2754 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED))
2755 Perl_croak(aTHX_ "Callback called exit");
2760 PL_op = PL_restartop;
2764 PL_stack_sp = PL_stack_base + oldmark;
2765 if (flags & G_ARRAY)
2769 *++PL_stack_sp = &PL_sv_undef;
2775 if (flags & G_DISCARD) {
2776 PL_stack_sp = PL_stack_base + oldmark;
2786 =for apidoc p||eval_pv
2788 Tells Perl to C<eval> the given string and return an SV* result.
2794 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2798 SV* sv = newSVpv(p, 0);
2800 eval_sv(sv, G_SCALAR);
2807 if (croak_on_error && SvTRUE(ERRSV)) {
2808 Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV));
2814 /* Require a module. */
2817 =head1 Embedding Functions
2819 =for apidoc p||require_pv
2821 Tells Perl to C<require> the file named by the string argument. It is
2822 analogous to the Perl code C<eval "require '$file'">. It's even
2823 implemented that way; consider using load_module instead.
2828 Perl_require_pv(pTHX_ const char *pv)
2833 PUSHSTACKi(PERLSI_REQUIRE);
2835 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2836 eval_sv(sv_2mortal(sv), G_DISCARD);
2842 Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen)
2844 register GV * const gv = gv_fetchpv(sym, GV_ADD, SVt_PV);
2847 sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen);
2851 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2853 /* This message really ought to be max 23 lines.
2854 * Removed -h because the user already knows that option. Others? */
2856 static const char * const usage_msg[] = {
2857 "-0[octal] specify record separator (\\0, if no argument)",
2858 "-a autosplit mode with -n or -p (splits $_ into @F)",
2859 "-C[number/list] enables the listed Unicode features",
2860 "-c check syntax only (runs BEGIN and CHECK blocks)",
2861 "-d[:debugger] run program under debugger",
2862 "-D[number/list] set debugging flags (argument is a bit mask or alphabets)",
2863 "-e program one line of program (several -e's allowed, omit programfile)",
2864 "-E program like -e, but enables all optional features",
2865 "-f don't do $sitelib/sitecustomize.pl at startup",
2866 "-F/pattern/ split() pattern for -a switch (//'s are optional)",
2867 "-i[extension] edit <> files in place (makes backup if extension supplied)",
2868 "-Idirectory specify @INC/#include directory (several -I's allowed)",
2869 "-l[octal] enable line ending processing, specifies line terminator",
2870 "-[mM][-]module execute \"use/no module...\" before executing program",
2871 "-n assume \"while (<>) { ... }\" loop around program",
2872 "-p assume loop like -n but print line also, like sed",
2873 "-P run program through C preprocessor before compilation",
2874 "-s enable rudimentary parsing for switches after programfile",
2875 "-S look for programfile using PATH environment variable",
2876 "-t enable tainting warnings",
2877 "-T enable tainting checks",
2878 "-u dump core after parsing program",
2879 "-U allow unsafe operations",
2880 "-v print version, subversion (includes VERY IMPORTANT perl info)",
2881 "-V[:variable] print configuration summary (or a single Config.pm variable)",
2882 "-w enable many useful warnings (RECOMMENDED)",
2883 "-W enable all warnings",
2884 "-x[directory] strip off text before #!perl line and perhaps cd to directory",
2885 "-X disable all warnings",
2889 const char * const *p = usage_msg;
2891 PerlIO_printf(PerlIO_stdout(),
2892 "\nUsage: %s [switches] [--] [programfile] [arguments]",
2895 PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
2898 /* convert a string of -D options (or digits) into an int.
2899 * sets *s to point to the char after the options */
2903 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2905 static const char * const usage_msgd[] = {
2906 " Debugging flag values: (see also -d)",
2907 " p Tokenizing and parsing (with v, displays parse stack)",
2908 " s Stack snapshots (with v, displays all stacks)",
2909 " l Context (loop) stack processing",
2910 " t Trace execution",
2911 " o Method and overloading resolution",
2912 " c String/numeric conversions",
2913 " P Print profiling info, preprocessor command for -P, source file input state",
2914 " m Memory allocation",
2915 " f Format processing",
2916 " r Regular expression parsing and execution",
2917 " x Syntax tree dump",
2918 " u Tainting checks",
2919 " H Hash dump -- usurps values()",
2920 " X Scratchpad allocation",
2922 " S Thread synchronization",
2924 " R Include reference counts of dumped variables (eg when using -Ds)",
2925 " J Do not s,t,P-debug (Jump over) opcodes within package DB",
2926 " v Verbose: use in conjunction with other flags",
2928 " A Consistency checks on internal structures",
2929 " q quiet - currently only suppresses the 'EXECUTING' message",
2934 /* if adding extra options, remember to update DEBUG_MASK */
2935 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAq";
2937 for (; isALNUM(**s); (*s)++) {
2938 const char * const d = strchr(debopts,**s);
2940 i |= 1 << (d - debopts);
2941 else if (ckWARN_d(WARN_DEBUGGING))
2942 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2943 "invalid option -D%c, use -D'' to see choices\n", **s);
2946 else if (isDIGIT(**s)) {
2948 for (; isALNUM(**s); (*s)++) ;
2950 else if (givehelp) {
2951 const char *const *p = usage_msgd;
2952 while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++);
2955 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2956 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2957 "-Dp not implemented on this platform\n");
2963 /* This routine handles any switches that can be given during run */
2966 Perl_moreswitches(pTHX_ const char *s)
2977 SvREFCNT_dec(PL_rs);
2978 if (s[1] == 'x' && s[2]) {
2979 const char *e = s+=2;
2985 flags = PERL_SCAN_SILENT_ILLDIGIT;
2986 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2987 if (s + numlen < e) {
2988 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2992 PL_rs = newSVpvs("");
2993 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2994 tmps = (U8*)SvPVX(PL_rs);
2995 uvchr_to_utf8(tmps, rschar);
2996 SvCUR_set(PL_rs, UNISKIP(rschar));
3001 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3002 if (rschar & ~((U8)~0))
3003 PL_rs = &PL_sv_undef;
3004 else if (!rschar && numlen >= 2)
3005 PL_rs = newSVpvs("");
3007 char ch = (char)rschar;
3008 PL_rs = newSVpvn(&ch, 1);
3011 sv_setsv(get_sv("/", TRUE), PL_rs);
3016 PL_unicode = parse_unicode_opts( (const char **)&s );
3017 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3023 while (*s && !isSPACE(*s)) ++s;
3024 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3035 forbid_setid('d', -1);
3038 /* -dt indicates to the debugger that threads will be used */
3039 if (*s == 't' && !isALNUM(s[1])) {
3041 my_setenv("PERL5DB_THREADED", "1");
3044 /* The following permits -d:Mod to accepts arguments following an =
3045 in the fashion that -MSome::Mod does. */
3046 if (*s == ':' || *s == '=') {
3048 SV * const sv = newSVpvs("use Devel::");
3050 /* We now allow -d:Module=Foo,Bar */
3051 while(isALNUM(*s) || *s==':') ++s;
3053 sv_catpv(sv, start);
3055 sv_catpvn(sv, start, s-start);
3056 /* Don't use NUL as q// delimiter here, this string goes in the
3058 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3061 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3065 PL_perldb = PERLDB_ALL;
3072 forbid_setid('D', -1);
3074 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3075 #else /* !DEBUGGING */
3076 if (ckWARN_d(WARN_DEBUGGING))
3077 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3078 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3079 for (s++; isALNUM(*s); s++) ;
3084 usage(PL_origargv[0]);
3087 Safefree(PL_inplace);
3088 #if defined(__CYGWIN__) /* do backup extension automagically */
3089 if (*(s+1) == '\0') {
3090 PL_inplace = savepvs(".bak");
3093 #endif /* __CYGWIN__ */
3095 const char * const start = ++s;
3096 while (*s && !isSPACE(*s))
3099 PL_inplace = savepvn(start, s - start);
3103 if (*s == '-') /* Additional switches on #! line. */
3107 case 'I': /* -I handled both here and in parse_body() */
3108 forbid_setid('I', -1);
3110 while (*s && isSPACE(*s))
3115 /* ignore trailing spaces (possibly followed by other switches) */
3117 for (e = p; *e && !isSPACE(*e); e++) ;
3121 } while (*p && *p != '-');
3122 e = savepvn(s, e-s);
3123 incpush(e, TRUE, TRUE, FALSE, FALSE);
3130 Perl_croak(aTHX_ "No directory specified for -I");
3136 SvREFCNT_dec(PL_ors_sv);
3142 PL_ors_sv = newSVpvs("\n");
3143 numlen = 3 + (*s == '0');
3144 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3148 if (RsPARA(PL_rs)) {
3149 PL_ors_sv = newSVpvs("\n\n");
3152 PL_ors_sv = newSVsv(PL_rs);
3157 forbid_setid('M', -1); /* XXX ? */
3160 forbid_setid('m', -1); /* XXX ? */
3164 const char *use = "use ";
3165 /* -M-foo == 'no foo' */
3166 /* Leading space on " no " is deliberate, to make both
3167 possibilities the same length. */
3168 if (*s == '-') { use = " no "; ++s; }
3169 sv = newSVpvn(use,4);
3171 /* We allow -M'Module qw(Foo Bar)' */
3172 while(isALNUM(*s) || *s==':') ++s;
3174 sv_catpv(sv, start);
3175 if (*(start-1) == 'm') {
3177 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3178 sv_catpvs( sv, " ()");
3182 Perl_croak(aTHX_ "Module name required with -%c option",
3184 sv_catpvn(sv, start, s-start);
3185 sv_catpvs(sv, " split(/,/,q");
3186 sv_catpvs(sv, "\0"); /* Use NUL as q//-delimiter. */
3188 sv_catpvs(sv, "\0)");
3191 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3194 Perl_croak(aTHX_ "Missing argument to -%c", *(s-1));
3205 forbid_setid('s', -1);
3206 PL_doswitches = TRUE;
3220 #ifdef MACOS_TRADITIONAL
3221 Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh");
3223 PL_do_undump = TRUE;
3231 if (!sv_derived_from(PL_patchlevel, "version"))
3232 upg_version(PL_patchlevel, TRUE);
3234 PerlIO_printf(PerlIO_stdout(),
3235 Perl_form(aTHX_ "\nThis is perl, %"SVf
3236 #ifdef PERL_PATCHNUM
3237 " DEVEL" STRINGIFY(PERL_PATCHNUM)
3240 SVfARG(vstringify(PL_patchlevel)),
3243 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3244 PerlIO_printf(PerlIO_stdout(),
3245 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3246 SVfARG(vstringify(PL_patchlevel))));
3247 PerlIO_printf(PerlIO_stdout(),
3248 Perl_form(aTHX_ " built under %s at %s %s\n",
3249 OSNAME, __DATE__, __TIME__));
3250 PerlIO_printf(PerlIO_stdout(),
3251 Perl_form(aTHX_ " OS Specific Release: %s\n",
3255 #if defined(LOCAL_PATCH_COUNT)
3256 if (LOCAL_PATCH_COUNT > 0)
3257 PerlIO_printf(PerlIO_stdout(),
3258 "\n(with %d registered patch%s, "
3259 "see perl -V for more detail)",
3261 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3264 PerlIO_printf(PerlIO_stdout(),
3265 "\n\nCopyright 1987-2007, Larry Wall\n");
3266 #ifdef MACOS_TRADITIONAL
3267 PerlIO_printf(PerlIO_stdout(),
3268 "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n"
3269 "maintained by Chris Nandor\n");
3272 PerlIO_printf(PerlIO_stdout(),
3273 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3278 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3281 PerlIO_printf(PerlIO_stdout(),
3282 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3283 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3286 PerlIO_printf(PerlIO_stdout(),
3287 "atariST series port, ++jrb bammi@cadence.com\n");
3290 PerlIO_printf(PerlIO_stdout(),
3291 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3298 PerlIO_printf(PerlIO_stdout(),
3299 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "MiNT port by Guido Flohr, 1997-1999\n");
3318 PerlIO_printf(PerlIO_stdout(),
3319 "EPOC port by Olaf Flebbe, 1999-2002\n");
3322 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3323 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3326 #ifdef __SYMBIAN32__
3327 PerlIO_printf(PerlIO_stdout(),
3328 "Symbian port by Nokia, 2004-2005\n");
3330 #ifdef BINARY_BUILD_NOTICE
3331 BINARY_BUILD_NOTICE;
3333 PerlIO_printf(PerlIO_stdout(),
3335 Perl may be copied only under the terms of either the Artistic License or the\n\
3336 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3337 Complete documentation for Perl, including FAQ lists, should be found on\n\
3338 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3339 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3342 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3343 PL_dowarn |= G_WARN_ON;
3348 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3349 if (!specialWARN(PL_compiling.cop_warnings))
3350 PerlMemShared_free(PL_compiling.cop_warnings);
3351 PL_compiling.cop_warnings = pWARN_ALL ;
3355 PL_dowarn = G_WARN_ALL_OFF;
3356 if (!specialWARN(PL_compiling.cop_warnings))
3357 PerlMemShared_free(PL_compiling.cop_warnings);
3358 PL_compiling.cop_warnings = pWARN_NONE ;
3363 if (s[1] == '-') /* Additional switches on #! line. */
3368 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3374 #ifdef ALTERNATE_SHEBANG
3375 case 'S': /* OS/2 needs -S on "extproc" line. */
3383 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3388 /* compliments of Tom Christiansen */
3390 /* unexec() can be found in the Gnu emacs distribution */
3391 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3394 Perl_my_unexec(pTHX)
3396 PERL_UNUSED_CONTEXT;
3398 SV * prog = newSVpv(BIN_EXP, 0);
3399 SV * file = newSVpv(PL_origfilename, 0);
3403 sv_catpvs(prog, "/perl");
3404 sv_catpvs(file, ".perldump");
3406 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3407 /* unexec prints msg to stderr in case of failure */
3408 PerlProc_exit(status);
3411 # include <lib$routines.h>
3412 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3413 # elif defined(WIN32) || defined(__CYGWIN__)
3414 Perl_croak(aTHX_ "dump is not supported");
3416 ABORT(); /* for use with undump */
3421 /* initialize curinterp */
3427 # define PERLVAR(var,type)
3428 # define PERLVARA(var,n,type)
3429 # if defined(PERL_IMPLICIT_CONTEXT)
3430 # define PERLVARI(var,type,init) aTHX->var = init;
3431 # define PERLVARIC(var,type,init) aTHX->var = init;
3433 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3434 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3436 # include "intrpvar.h"
3442 # define PERLVAR(var,type)
3443 # define PERLVARA(var,n,type)
3444 # define PERLVARI(var,type,init) PL_##var = init;
3445 # define PERLVARIC(var,type,init) PL_##var = init;
3446 # include "intrpvar.h"
3453 /* As these are inside a structure, PERLVARI isn't capable of initialising
3455 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3456 PL_reg_poscache = PL_reg_starttry = NULL;
3460 S_init_main_stash(pTHX)
3465 PL_curstash = PL_defstash = newHV();
3466 /* We know that the string "main" will be in the global shared string
3467 table, so it's a small saving to use it rather than allocate another
3469 PL_curstname = newSVpvs_share("main");
3470 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3471 /* If we hadn't caused another reference to "main" to be in the shared
3472 string table above, then it would be worth reordering these two,
3473 because otherwise all we do is delete "main" from it as a consequence
3474 of the SvREFCNT_dec, only to add it again with hv_name_set */
3475 SvREFCNT_dec(GvHV(gv));
3476 hv_name_set(PL_defstash, "main", 4, 0);
3477 GvHV(gv) = (HV*)SvREFCNT_inc_simple(PL_defstash);
3479 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3481 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3482 GvMULTI_on(PL_incgv);
3483 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3484 GvMULTI_on(PL_hintgv);
3485 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3486 SvREFCNT_inc_simple_void(PL_defgv);
3487 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3488 SvREFCNT_inc_simple_void(PL_errgv);
3489 GvMULTI_on(PL_errgv);
3490 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3491 GvMULTI_on(PL_replgv);
3492 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3493 #ifdef PERL_DONT_CREATE_GVSV
3496 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3497 sv_setpvn(ERRSV, "", 0);
3498 PL_curstash = PL_defstash;
3499 CopSTASH_set(&PL_compiling, PL_defstash);
3500 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3501 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3503 /* We must init $/ before switches are processed. */
3504 sv_setpvn(get_sv("/", TRUE), "\n", 1);
3508 S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv,
3509 int *suidscript, PerlIO **rsfpp)
3514 const char *cpp_discard_flag;
3523 PL_origfilename = savepvs("-e");
3526 /* if find_script() returns, it returns a malloc()-ed value */
3527 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3529 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3530 const char *s = scriptname + 8;
3536 * Tell apart "normal" usage of fdscript, e.g.
3537 * with bash on FreeBSD:
3538 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3539 * from usage in suidperl.
3540 * Does any "normal" usage leave garbage after the number???
3541 * Is it a mistake to use a similar /dev/fd/ construct for
3546 * Be supersafe and do some sanity-checks.
3547 * Still, can we be sure we got the right thing?
3550 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3553 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3555 scriptname = savepv(s + 1);
3556 Safefree(PL_origfilename);
3557 PL_origfilename = (char *)scriptname;
3562 CopFILE_free(PL_curcop);
3563 CopFILE_set(PL_curcop, PL_origfilename);
3564 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3565 scriptname = (char *)"";
3566 if (fdscript >= 0) {
3567 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3568 # if defined(HAS_FCNTL) && defined(F_SETFD)
3570 /* ensure close-on-exec */
3571 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3576 Perl_croak(aTHX_ "sperl needs fd script\n"
3577 "You should not call sperl directly; do you need to "
3578 "change a #! line\nfrom sperl to perl?\n");
3581 * Do not open (or do other fancy stuff) while setuid.
3582 * Perl does the open, and hands script to suidperl on a fd;
3583 * suidperl only does some checks, sets up UIDs and re-execs
3584 * perl with that fd as it has always done.
3587 if (*suidscript != 1) {
3588 Perl_croak(aTHX_ "suidperl needs (suid) fd script\n");
3591 else if (PL_preprocess) {
3592 const char * const cpp_cfg = CPPSTDIN;
3593 SV * const cpp = newSVpvs("");
3594 SV * const cmd = newSV(0);
3596 if (cpp_cfg[0] == 0) /* PERL_MICRO? */
3597 Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined");
3598 if (strEQ(cpp_cfg, "cppstdin"))
3599 Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP);
3600 sv_catpv(cpp, cpp_cfg);
3603 sv_catpvs(sv, "-I");
3604 sv_catpv(sv,PRIVLIB_EXP);
3607 DEBUG_P(PerlIO_printf(Perl_debug_log,
3608 "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n",
3609 scriptname, SvPVX_const (cpp), SvPVX_const (sv),
3612 # if defined(MSDOS) || defined(WIN32) || defined(VMS)
3619 cpp_discard_flag = "";
3621 cpp_discard_flag = "-C";
3625 perl = os2_execname(aTHX);
3627 perl = PL_origargv[0];
3631 /* This strips off Perl comments which might interfere with
3632 the C pre-processor, including #!. #line directives are
3633 deliberately stripped to avoid confusion with Perl's version
3634 of #line. FWP played some golf with it so it will fit
3635 into VMS's 255 character buffer.
3638 code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3640 code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print";
3642 Perl_sv_setpvf(aTHX_ cmd, "\
3643 %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s",
3644 perl, quote, code, quote, scriptname, SVfARG(cpp),
3645 cpp_discard_flag, SVfARG(sv), CPPMINUS);
3647 PL_doextract = FALSE;
3649 DEBUG_P(PerlIO_printf(Perl_debug_log,
3650 "PL_preprocess: cmd=\"%s\"\n",
3653 *rsfpp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r");
3657 else if (!*scriptname) {
3658 forbid_setid(0, *suidscript);
3659 *rsfpp = PerlIO_stdin();
3662 #ifdef FAKE_BIT_BUCKET
3663 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3664 * is called) and still have the "-e" work. (Believe it or not,
3665 * a /dev/null is required for the "-e" to work because source
3666 * filter magic is used to implement it. ) This is *not* a general
3667 * replacement for a /dev/null. What we do here is create a temp
3668 * file (an empty file), open up that as the script, and then
3669 * immediately close and unlink it. Close enough for jazz. */
3670 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3671 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3672 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3673 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3674 FAKE_BIT_BUCKET_TEMPLATE
3676 const char * const err = "Failed to create a fake bit bucket";
3677 if (strEQ(scriptname, BIT_BUCKET)) {
3678 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3679 int tmpfd = mkstemp(tmpname);
3681 scriptname = tmpname;
3684 Perl_croak(aTHX_ err);
3687 scriptname = mktemp(tmpname);
3689 Perl_croak(aTHX_ err);
3694 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3695 #ifdef FAKE_BIT_BUCKET
3696 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3697 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3698 && strlen(scriptname) == sizeof(tmpname) - 1) {
3701 scriptname = BIT_BUCKET;
3703 # if defined(HAS_FCNTL) && defined(F_SETFD)
3705 /* ensure close-on-exec */
3706 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3709 #endif /* IAMSUID */
3711 /* PSz 16 Sep 03 Keep neat error message */
3713 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3715 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3716 CopFILE(PL_curcop), Strerror(errno));
3722 * I_SYSSTATVFS HAS_FSTATVFS
3724 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3725 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3726 * here so that metaconfig picks them up. */
3730 S_fd_on_nosuid_fs(pTHX_ int fd)
3733 * We used to do this as "plain" user (after swapping UIDs with setreuid);
3734 * but is needed also on machines without setreuid.
3735 * Seems safe enough to run as root.
3737 int check_okay = 0; /* able to do all the required sys/libcalls */
3738 int on_nosuid = 0; /* the fd is on a nosuid fs */
3740 * Need to check noexec also: nosuid might not be set, the average
3741 * sysadmin would say that nosuid is irrelevant once he sets noexec.
3743 int on_noexec = 0; /* the fd is on a noexec fs */
3746 * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent().
3747 * fstatvfs() is UNIX98.
3748 * fstatfs() is 4.3 BSD.
3749 * ustat()+getmnt() is pre-4.3 BSD.
3750 * getmntent() is O(number-of-mounted-filesystems) and can hang on
3751 * an irrelevant filesystem while trying to reach the right one.
3754 #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */
3756 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3757 defined(HAS_FSTATVFS)
3758 # define FD_ON_NOSUID_CHECK_OKAY
3759 struct statvfs stfs;
3761 check_okay = fstatvfs(fd, &stfs) == 0;
3762 on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID);
3764 /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented
3765 on platforms where it is present. */
3766 on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC);
3768 # endif /* fstatvfs */
3770 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3771 defined(PERL_MOUNT_NOSUID) && \
3772 defined(PERL_MOUNT_NOEXEC) && \
3773 defined(HAS_FSTATFS) && \
3774 defined(HAS_STRUCT_STATFS) && \
3775 defined(HAS_STRUCT_STATFS_F_FLAGS)
3776 # define FD_ON_NOSUID_CHECK_OKAY
3779 check_okay = fstatfs(fd, &stfs) == 0;
3780 on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID);
3781 on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC);
3782 # endif /* fstatfs */
3784 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3785 defined(PERL_MOUNT_NOSUID) && \
3786 defined(PERL_MOUNT_NOEXEC) && \
3787 defined(HAS_FSTAT) && \
3788 defined(HAS_USTAT) && \
3789 defined(HAS_GETMNT) && \
3790 defined(HAS_STRUCT_FS_DATA) && \
3792 # define FD_ON_NOSUID_CHECK_OKAY
3795 if (fstat(fd, &fdst) == 0) {
3797 if (ustat(fdst.st_dev, &us) == 0) {
3799 /* NOSTAT_ONE here because we're not examining fields which
3800 * vary between that case and STAT_ONE. */
3801 if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) {
3802 size_t cmplen = sizeof(us.f_fname);
3803 if (sizeof(fsd.fd_req.path) < cmplen)
3804 cmplen = sizeof(fsd.fd_req.path);
3805 if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) &&
3806 fdst.st_dev == fsd.fd_req.dev) {
3808 on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID;
3809 on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC;
3814 # endif /* fstat+ustat+getmnt */
3816 # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \
3817 defined(HAS_GETMNTENT) && \
3818 defined(HAS_HASMNTOPT) && \
3819 defined(MNTOPT_NOSUID) && \
3820 defined(MNTOPT_NOEXEC)
3821 # define FD_ON_NOSUID_CHECK_OKAY
3822 FILE *mtab = fopen("/etc/mtab", "r");
3823 struct mntent *entry;
3826 if (mtab && (fstat(fd, &stb) == 0)) {
3827 while (entry = getmntent(mtab)) {
3828 if (stat(entry->mnt_dir, &fsb) == 0
3829 && fsb.st_dev == stb.st_dev)
3831 /* found the filesystem */
3833 if (hasmntopt(entry, MNTOPT_NOSUID))
3835 if (hasmntopt(entry, MNTOPT_NOEXEC))
3838 } /* A single fs may well fail its stat(). */
3843 # endif /* getmntent+hasmntopt */
3846 Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename);
3848 Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename);
3850 Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename);
3851 return ((!check_okay) || on_nosuid || on_noexec);
3853 #endif /* IAMSUID */
3856 S_validate_suid(pTHX_ const char *validarg, const char *scriptname,
3857 int fdscript, int suidscript, SV *linestr_sv, PerlIO *rsfp)
3862 #endif /* IAMSUID */
3864 /* do we need to emulate setuid on scripts? */
3866 /* This code is for those BSD systems that have setuid #! scripts disabled
3867 * in the kernel because of a security problem. Merely defining DOSUID
3868 * in perl will not fix that problem, but if you have disabled setuid
3869 * scripts in the kernel, this will attempt to emulate setuid and setgid
3870 * on scripts that have those now-otherwise-useless bits set. The setuid
3871 * root version must be called suidperl or sperlN.NNN. If regular perl
3872 * discovers that it has opened a setuid script, it calls suidperl with
3873 * the same argv that it had. If suidperl finds that the script it has
3874 * just opened is NOT setuid root, it sets the effective uid back to the
3875 * uid. We don't just make perl setuid root because that loses the
3876 * effective uid we had before invoking perl, if it was different from the
3879 * Description/comments above do not match current workings:
3880 * suidperl must be hardlinked to sperlN.NNN (that is what we exec);
3881 * suidperl called with script open and name changed to /dev/fd/N/X;
3882 * suidperl croaks if script is not setuid;
3883 * making perl setuid would be a huge security risk (and yes, that
3884 * would lose any euid we might have had).
3886 * DOSUID must be defined in both perl and suidperl, and IAMSUID must
3887 * be defined in suidperl only. suidperl must be setuid root. The
3888 * Configure script will set this up for you if you want it.
3894 if (PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf) < 0) /* normal stat is insecure */
3895 Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename);
3896 if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) {
3898 const char *linestr;
3902 if (fdscript < 0 || suidscript != 1)
3903 Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */
3905 * Since the script is opened by perl, not suidperl, some of these
3906 * checks are superfluous. Leaving them in probably does not lower
3910 * Do checks even for systems with no HAS_SETREUID.
3911 * We used to swap, then re-swap UIDs with
3912 # ifdef HAS_SETREUID
3913 if (setreuid(PL_euid,PL_uid) < 0
3914 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid)
3915 Perl_croak(aTHX_ "Can't swap uid and euid");
3917 # ifdef HAS_SETREUID
3918 if (setreuid(PL_uid,PL_euid) < 0
3919 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid)
3920 Perl_croak(aTHX_ "Can't reswap uid and euid");
3924 /* On this access check to make sure the directories are readable,
3925 * there is actually a small window that the user could use to make
3926 * filename point to an accessible directory. So there is a faint
3927 * chance that someone could execute a setuid script down in a
3928 * non-accessible directory. I don't know what to do about that.
3929 * But I don't think it's too important. The manual lies when
3930 * it says access() is useful in setuid programs.
3932 * So, access() is pretty useless... but not harmful... do anyway.
3934 if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/
3935 Perl_croak(aTHX_ "Can't access() script\n");
3938 /* If we can swap euid and uid, then we can determine access rights
3939 * with a simple stat of the file, and then compare device and
3940 * inode to make sure we did stat() on the same file we opened.
3941 * Then we just have to make sure he or she can execute it.
3944 * As the script is opened by perl, not suidperl, we do not need to
3945 * care much about access rights.
3947 * The 'script changed' check is needed, or we can get lied to
3948 * about $0 with e.g.
3949 * suidperl /dev/fd/4//bin/x 4<setuidscript
3950 * Without HAS_SETREUID, is it safe to stat() as root?
3952 * Are there any operating systems that pass /dev/fd/xxx for setuid
3953 * scripts, as suggested/described in perlsec(1)? Surely they do not
3954 * pass the script name as we do, so the "script changed" test would
3955 * fail for them... but we never get here with
3956 * SETUID_SCRIPTS_ARE_SECURE_NOW defined.
3958 * This is one place where we must "lie" about return status: not
3959 * say if the stat() failed. We are doing this as root, and could
3960 * be tricked into reporting existence or not of files that the
3961 * "plain" user cannot even see.
3965 if (PerlLIO_stat(CopFILE(PL_curcop),&tmpstatbuf) < 0 ||
3966 tmpstatbuf.st_dev != PL_statbuf.st_dev ||
3967 tmpstatbuf.st_ino != PL_statbuf.st_ino) {
3968 Perl_croak(aTHX_ "Setuid script changed\n");
3972 if (!cando(S_IXUSR,FALSE,&PL_statbuf)) /* can real uid exec? */
3973 Perl_croak(aTHX_ "Real UID cannot exec script\n");
3976 * We used to do this check as the "plain" user (after swapping
3977 * UIDs). But the check for nosuid and noexec filesystem is needed,
3978 * and should be done even without HAS_SETREUID. (Maybe those
3979 * operating systems do not have such mount options anyway...)
3980 * Seems safe enough to do as root.
3982 # if !defined(NO_NOSUID_CHECK)
3983 if (fd_on_nosuid_fs(PerlIO_fileno(rsfp))) {
3984 Perl_croak(aTHX_ "Setuid script on nosuid or noexec filesystem\n");
3987 # endif /* IAMSUID */
3989 if (!S_ISREG(PL_statbuf.st_mode)) {
3990 Perl_croak(aTHX_ "Setuid script not plain file\n");
3992 if (PL_statbuf.st_mode & S_IWOTH)
3993 Perl_croak(aTHX_ "Setuid/gid script is writable by world");
3994 PL_doswitches = FALSE; /* -s is insecure in suid */
3995 /* PSz 13 Nov 03 But -s was caught elsewhere ... so unsetting it here is useless(?!) */
3996 CopLINE_inc(PL_curcop);
3997 if (sv_gets(linestr_sv, rsfp, 0) == NULL)
3998 Perl_croak(aTHX_ "No #! line");
3999 linestr = SvPV_nolen_const(linestr_sv);
4000 /* required even on Sys V */
4001 if (!*linestr || !linestr[1] || strnNE(linestr,"#!",2))
4002 Perl_croak(aTHX_ "No #! line");
4006 /* Sanity check on line length */
4007 s_end = s + strlen(s);
4008 if (s_end == s || (s_end - s) > 4000)
4009 Perl_croak(aTHX_ "Very long #! line");
4010 /* Allow more than a single space after #! */
4011 while (isSPACE(*s)) s++;
4012 /* Sanity check on buffer end */
4013 while ((*s) && !isSPACE(*s)) s++;
4014 for (s2 = s; (s2 > linestr &&
4015 (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_'
4016 || s2[-1] == '-')); s2--) ;
4017 /* Sanity check on buffer start */
4018 if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) &&
4019 (s-9 < linestr || strnNE(s-9,"perl",4)) )
4020 Perl_croak(aTHX_ "Not a perl script");
4021 while (*s == ' ' || *s == '\t') s++;
4023 * #! arg must be what we saw above. They can invoke it by
4024 * mentioning suidperl explicitly, but they may not add any strange
4025 * arguments beyond what #! says if they do invoke suidperl that way.
4028 * The way validarg was set up, we rely on the kernel to start
4029 * scripts with argv[1] set to contain all #! line switches (the
4033 * Check that we got all the arguments listed in the #! line (not
4034 * just that there are no extraneous arguments). Might not matter
4035 * much, as switches from #! line seem to be acted upon (also), and
4036 * so may be checked and trapped in perl. But, security checks must
4037 * be done in suidperl and not deferred to perl. Note that suidperl
4038 * does not get around to parsing (and checking) the switches on
4039 * the #! line (but execs perl sooner).
4040 * Allow (require) a trailing newline (which may be of two
4041 * characters on some architectures?) (but no other trailing
4044 len = strlen(validarg);
4045 if (strEQ(validarg," PHOOEY ") ||
4046 strnNE(s,validarg,len) || !isSPACE(s[len]) ||
4047 !((s_end - s) == len+1
4048 || ((s_end - s) == len+2 && isSPACE(s[len+1]))))
4049 Perl_croak(aTHX_ "Args must match #! line");
4053 PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) &&
4054 PL_euid == PL_statbuf.st_uid)
4056 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4057 FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n");
4058 # endif /* IAMSUID */
4061 PL_euid) { /* oops, we're not the setuid root perl */
4063 * When root runs a setuid script, we do not go through the same
4064 * steps of execing sperl and then perl with fd scripts, but
4065 * simply set up UIDs within the same perl invocation; so do
4066 * not have the same checks (on options, whatever) that we have
4067 * for plain users. No problem really: would have to be a script
4068 * that does not actually work for plain users; and if root is
4069 * foolish and can be persuaded to run such an unsafe script, he
4070 * might run also non-setuid ones, and deserves what he gets.
4072 * Or, we might drop the PL_euid check above (and rely just on
4073 * fdscript to avoid loops), and do the execs
4079 * Pass fd script to suidperl.
4080 * Exec suidperl, substituting fd script for scriptname.
4081 * Pass script name as "subdir" of fd, which perl will grok;
4082 * in fact will use that to distinguish this from "normal"
4083 * usage, see comments above.
4085 PerlIO_rewind(rsfp);
4086 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4087 /* PSz 27 Feb 04 Sanity checks on scriptname */
4088 if ((!scriptname) || (!*scriptname) ) {
4089 Perl_croak(aTHX_ "No setuid script name\n");
4091 if (*scriptname == '-') {
4092 Perl_croak(aTHX_ "Setuid script name may not begin with dash\n");
4093 /* Or we might confuse it with an option when replacing
4094 * name in argument list, below (though we do pointer, not
4095 * string, comparisons).
4098 for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ;
4099 if (!PL_origargv[which]) {
4100 Perl_croak(aTHX_ "Can't change argv to have fd script\n");
4102 PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s",
4103 PerlIO_fileno(rsfp), PL_origargv[which]));
4104 # if defined(HAS_FCNTL) && defined(F_SETFD)
4105 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4108 PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP,
4109 (int)PERL_REVISION, (int)PERL_VERSION,
4110 (int)PERL_SUBVERSION), PL_origargv);
4112 # endif /* IAMSUID */
4113 Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n");
4116 if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) {
4118 * This seems back to front: we try HAS_SETEGID first; if not available
4119 * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK
4120 * in the sense that we only want to set EGID; but are there any machines
4121 * with either of the latter, but not the former? Same with UID, later.
4124 (void)setegid(PL_statbuf.st_gid);
4126 # ifdef HAS_SETREGID
4127 (void)setregid((Gid_t)-1,PL_statbuf.st_gid);
4129 # ifdef HAS_SETRESGID
4130 (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1);
4132 PerlProc_setgid(PL_statbuf.st_gid);
4136 if (PerlProc_getegid() != PL_statbuf.st_gid)
4137 Perl_croak(aTHX_ "Can't do setegid!\n");
4139 if (PL_statbuf.st_mode & S_ISUID) {
4140 if (PL_statbuf.st_uid != PL_euid)
4142 (void)seteuid(PL_statbuf.st_uid); /* all that for this */
4144 # ifdef HAS_SETREUID
4145 (void)setreuid((Uid_t)-1,PL_statbuf.st_uid);
4147 # ifdef HAS_SETRESUID
4148 (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1);
4150 PerlProc_setuid(PL_statbuf.st_uid);
4154 if (PerlProc_geteuid() != PL_statbuf.st_uid)
4155 Perl_croak(aTHX_ "Can't do seteuid!\n");
4157 else if (PL_uid) { /* oops, mustn't run as root */
4159 (void)seteuid((Uid_t)PL_uid);
4161 # ifdef HAS_SETREUID
4162 (void)setreuid((Uid_t)-1,(Uid_t)PL_uid);
4164 # ifdef HAS_SETRESUID
4165 (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1);
4167 PerlProc_setuid((Uid_t)PL_uid);
4171 if (PerlProc_geteuid() != PL_uid)
4172 Perl_croak(aTHX_ "Can't do seteuid!\n");
4175 if (!cando(S_IXUSR,TRUE,&PL_statbuf))
4176 Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */
4179 else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4180 Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n");
4181 else if (fdscript < 0 || suidscript != 1)
4182 /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */
4183 Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n");
4185 /* PSz 16 Sep 03 Keep neat error message */
4186 Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n");
4189 /* We absolutely must clear out any saved ids here, so we */
4190 /* exec the real perl, substituting fd script for scriptname. */
4191 /* (We pass script name as "subdir" of fd, which perl will grok.) */
4193 * It might be thought that using setresgid and/or setresuid (changed to
4194 * set the saved IDs) above might obviate the need to exec, and we could
4195 * go on to "do the perl thing".
4197 * Is there such a thing as "saved GID", and is that set for setuid (but
4198 * not setgid) execution like suidperl? Without exec, it would not be
4199 * cleared for setuid (but not setgid) scripts (or might need a dummy
4202 * We need suidperl to do the exact same argument checking that perl
4203 * does. Thus it cannot be very small; while it could be significantly
4204 * smaller, it is safer (simpler?) to make it essentially the same
4205 * binary as perl (but they are not identical). - Maybe could defer that
4206 * check to the invoked perl, and suidperl be a tiny wrapper instead;
4207 * but prefer to do thorough checks in suidperl itself. Such deferral
4208 * would make suidperl security rely on perl, a design no-no.
4210 * Setuid things should be short and simple, thus easy to understand and
4211 * verify. They should do their "own thing", without influence by
4212 * attackers. It may help if their internal execution flow is fixed,
4213 * regardless of platform: it may be best to exec anyway.
4215 * Suidperl should at least be conceptually simple: a wrapper only,
4216 * never to do any real perl. Maybe we should put
4218 * Perl_croak(aTHX_ "Suidperl should never do real perl\n");
4220 * into the perly bits.
4222 PerlIO_rewind(rsfp);
4223 PerlLIO_lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
4225 * Keep original arguments: suidperl already has fd script.
4227 /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */
4228 /* if (!PL_origargv[which]) { */
4229 /* errno = EPERM; */
4230 /* Perl_croak(aTHX_ "Permission denied\n"); */
4232 /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */
4233 /* PerlIO_fileno(rsfp), PL_origargv[which])); */
4234 # if defined(HAS_FCNTL) && defined(F_SETFD)
4235 fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
4238 PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP,
4239 (int)PERL_REVISION, (int)PERL_VERSION,
4240 (int)PERL_SUBVERSION), PL_origargv);/* try again */
4242 Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n");
4243 # endif /* IAMSUID */
4245 PERL_UNUSED_ARG(fdscript);
4246 PERL_UNUSED_ARG(suidscript);
4247 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
4248 # ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4249 PERL_UNUSED_ARG(rsfp);
4251 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
4252 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
4254 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
4257 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4258 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4259 # endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4260 /* not set-id, must be wrapped */
4263 PERL_UNUSED_ARG(validarg);
4264 PERL_UNUSED_ARG(scriptname);
4265 PERL_UNUSED_ARG(linestr_sv);
4269 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4273 register const char *s2;
4274 #ifdef MACOS_TRADITIONAL
4278 /* skip forward in input to the real script? */
4280 #ifdef MACOS_TRADITIONAL
4281 /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */
4283 while (PL_doextract || gMacPerl_AlwaysExtract) {
4284 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL) {
4285 if (!gMacPerl_AlwaysExtract)
4286 Perl_croak(aTHX_ "No Perl script found in input\n");
4288 if (PL_doextract) /* require explicit override ? */
4289 if (!OverrideExtract(PL_origfilename))
4290 Perl_croak(aTHX_ "User aborted script\n");
4292 PL_doextract = FALSE;
4294 /* Pater peccavi, file does not have #! */
4295 PerlIO_rewind(rsfp);
4300 while (PL_doextract) {
4301 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4302 Perl_croak(aTHX_ "No Perl script found in input\n");
4305 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
4306 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4307 PL_doextract = FALSE;
4308 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4310 while (*s == ' ' || *s == '\t') s++;
4312 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4313 || s2[-1] == '_') s2--;
4314 if (strnEQ(s2-4,"perl",4))
4315 while ((s = moreswitches(s)))
4318 #ifdef MACOS_TRADITIONAL
4319 /* We are always searching for the #!perl line in MacPerl,
4320 * so if we find it, still keep the line count correct
4321 * by counting lines we already skipped over
4323 for (; maclines > 0 ; maclines--)
4324 PerlIO_ungetc(rsfp, '\n');
4328 /* gMacPerl_AlwaysExtract is false in MPW tool */
4329 } else if (gMacPerl_AlwaysExtract) {
4341 PL_uid = PerlProc_getuid();
4342 PL_euid = PerlProc_geteuid();
4343 PL_gid = PerlProc_getgid();
4344 PL_egid = PerlProc_getegid();
4346 PL_uid |= PL_gid << 16;
4347 PL_euid |= PL_egid << 16;
4349 /* Should not happen: */
4350 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4351 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
4354 * Should go by suidscript, not uid!=euid: why disallow
4355 * system("ls") in scripts run from setuid things?
4356 * Or, is this run before we check arguments and set suidscript?
4357 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4358 * (We never have suidscript, can we be sure to have fdscript?)
4359 * Or must then go by UID checks? See comments in forbid_setid also.
4363 /* This is used very early in the lifetime of the program,
4364 * before even the options are parsed, so PL_tainting has
4365 * not been initialized properly. */
4367 Perl_doing_taint(int argc, char *argv[], char *envp[])
4369 #ifndef PERL_IMPLICIT_SYS
4370 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4371 * before we have an interpreter-- and the whole point of this
4372 * function is to be called at such an early stage. If you are on
4373 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4374 * "tainted because running with altered effective ids', you'll
4375 * have to add your own checks somewhere in here. The two most
4376 * known samples of 'implicitness' are Win32 and NetWare, neither
4377 * of which has much of concept of 'uids'. */
4378 int uid = PerlProc_getuid();
4379 int euid = PerlProc_geteuid();
4380 int gid = PerlProc_getgid();
4381 int egid = PerlProc_getegid();
4388 if (uid && (euid != uid || egid != gid))
4390 #endif /* !PERL_IMPLICIT_SYS */
4391 /* This is a really primitive check; environment gets ignored only
4392 * if -T are the first chars together; otherwise one gets
4393 * "Too late" message. */
4394 if ( argc > 1 && argv[1][0] == '-'
4395 && (argv[1][1] == 't' || argv[1][1] == 'T') )
4400 /* Passing the flag as a single char rather than a string is a slight space
4401 optimisation. The only message that isn't /^-.$/ is
4402 "program input from stdin", which is substituted in place of '\0', which
4403 could never be a command line flag. */
4405 S_forbid_setid(pTHX_ const char flag, const int suidscript)
4408 char string[3] = "-x";
4409 const char *message = "program input from stdin";
4416 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4417 if (PL_euid != PL_uid)
4418 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4419 if (PL_egid != PL_gid)
4420 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4421 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4423 * Checks for UID/GID above "wrong": why disallow
4424 * perl -e 'print "Hello\n"'
4425 * from within setuid things?? Simply drop them: replaced by
4426 * fdscript/suidscript and #ifdef IAMSUID checks below.
4428 * This may be too late for command-line switches. Will catch those on
4429 * the #! line, after finding the script name and setting up
4430 * fdscript/suidscript. Note that suidperl does not get around to
4431 * parsing (and checking) the switches on the #! line, but checks that
4432 * the two sets are identical.
4434 * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or
4435 * instead, or would that be "too late"? (We never have suidscript, can
4436 * we be sure to have fdscript?)
4438 * Catch things with suidscript (in descendant of suidperl), even with
4439 * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID,
4440 * below; but I am paranoid.
4442 * Also see comments about root running a setuid script, elsewhere.
4444 if (suidscript >= 0)
4445 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4447 /* PSz 11 Nov 03 Catch it in suidperl, always! */
4448 Perl_croak(aTHX_ "No %s allowed in suidperl", message);
4449 #endif /* IAMSUID */
4453 Perl_init_debugger(pTHX)
4456 HV * const ostash = PL_curstash;
4458 PL_curstash = PL_debstash;
4459 PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args", GV_ADDMULTI,
4461 AvREAL_off(PL_dbargs);
4462 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
4463 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
4464 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
4465 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4466 sv_setiv(PL_DBsingle, 0);
4467 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4468 sv_setiv(PL_DBtrace, 0);
4469 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4470 sv_setiv(PL_DBsignal, 0);
4471 PL_curstash = ostash;
4474 #ifndef STRESS_REALLOC
4475 #define REASONABLE(size) (size)
4477 #define REASONABLE(size) (1) /* unreasonable */
4481 Perl_init_stacks(pTHX)
4484 /* start with 128-item stack and 8K cxstack */
4485 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4486 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4487 PL_curstackinfo->si_type = PERLSI_MAIN;
4488 PL_curstack = PL_curstackinfo->si_stack;
4489 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4491 PL_stack_base = AvARRAY(PL_curstack);
4492 PL_stack_sp = PL_stack_base;
4493 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4495 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4498 PL_tmps_max = REASONABLE(128);
4500 Newx(PL_markstack,REASONABLE(32),I32);
4501 PL_markstack_ptr = PL_markstack;
4502 PL_markstack_max = PL_markstack + REASONABLE(32);
4506 Newx(PL_scopestack,REASONABLE(32),I32);
4507 PL_scopestack_ix = 0;
4508 PL_scopestack_max = REASONABLE(32);
4510 Newx(PL_savestack,REASONABLE(128),ANY);
4511 PL_savestack_ix = 0;
4512 PL_savestack_max = REASONABLE(128);
4521 while (PL_curstackinfo->si_next)
4522 PL_curstackinfo = PL_curstackinfo->si_next;
4523 while (PL_curstackinfo) {
4524 PERL_SI *p = PL_curstackinfo->si_prev;
4525 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4526 Safefree(PL_curstackinfo->si_cxstack);
4527 Safefree(PL_curstackinfo);
4528 PL_curstackinfo = p;
4530 Safefree(PL_tmps_stack);
4531 Safefree(PL_markstack);
4532 Safefree(PL_scopestack);
4533 Safefree(PL_savestack);
4538 S_init_predump_symbols(pTHX)
4544 sv_setpvn(get_sv("\"", TRUE), " ", 1);
4545 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4546 GvMULTI_on(PL_stdingv);
4547 io = GvIOp(PL_stdingv);
4548 IoTYPE(io) = IoTYPE_RDONLY;
4549 IoIFP(io) = PerlIO_stdin();
4550 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4552 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4554 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4557 IoTYPE(io) = IoTYPE_WRONLY;
4558 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4560 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4562 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4564 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4565 GvMULTI_on(PL_stderrgv);
4566 io = GvIOp(PL_stderrgv);
4567 IoTYPE(io) = IoTYPE_WRONLY;
4568 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4569 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4571 GvIOp(tmpgv) = (IO*)SvREFCNT_inc_simple(io);
4573 PL_statname = newSV(0); /* last filename we did stat on */
4575 Safefree(PL_osname);
4576 PL_osname = savepv(OSNAME);
4580 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4583 argc--,argv++; /* skip name of script */
4584 if (PL_doswitches) {
4585 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4589 if (argv[0][1] == '-' && !argv[0][2]) {
4593 if ((s = strchr(argv[0], '='))) {
4594 const char *const start_name = argv[0] + 1;
4595 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4596 TRUE, SVt_PV)), s + 1);
4599 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4602 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4603 GvMULTI_on(PL_argvgv);
4604 (void)gv_AVadd(PL_argvgv);
4605 av_clear(GvAVn(PL_argvgv));
4606 for (; argc > 0; argc--,argv++) {
4607 SV * const sv = newSVpv(argv[0],0);
4608 av_push(GvAVn(PL_argvgv),sv);
4609 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4610 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4613 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4614 (void)sv_utf8_decode(sv);
4620 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4625 PL_toptarget = newSV_type(SVt_PVFM);
4626 sv_setpvn(PL_toptarget, "", 0);
4627 PL_bodytarget = newSV_type(SVt_PVFM);
4628 sv_setpvn(PL_bodytarget, "", 0);
4629 PL_formtarget = PL_bodytarget;
4633 init_argv_symbols(argc,argv);
4635 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4636 #ifdef MACOS_TRADITIONAL
4637 /* $0 is not majick on a Mac */
4638 sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename));
4640 sv_setpv(GvSV(tmpgv),PL_origfilename);
4641 magicname("0", "0", 1);
4644 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4646 bool env_is_not_environ;
4647 GvMULTI_on(PL_envgv);
4648 hv = GvHVn(PL_envgv);
4649 hv_magic(hv, NULL, PERL_MAGIC_env);
4651 #ifdef USE_ENVIRON_ARRAY
4652 /* Note that if the supplied env parameter is actually a copy
4653 of the global environ then it may now point to free'd memory
4654 if the environment has been modified since. To avoid this
4655 problem we treat env==NULL as meaning 'use the default'
4659 env_is_not_environ = env != environ;
4660 if (env_is_not_environ
4661 # ifdef USE_ITHREADS
4662 && PL_curinterp == aTHX
4671 for (; *env; env++) {
4672 if (!(s = strchr(*env,'=')) || s == *env)
4674 #if defined(MSDOS) && !defined(DJGPP)
4679 sv = newSVpv(s+1, 0);
4680 (void)hv_store(hv, *env, s - *env, sv, 0);
4681 if (env_is_not_environ)
4685 #endif /* USE_ENVIRON_ARRAY */
4686 #endif /* !PERL_MICRO */
4689 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4690 SvREADONLY_off(GvSV(tmpgv));
4691 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4692 SvREADONLY_on(GvSV(tmpgv));
4694 #ifdef THREADS_HAVE_PIDS
4695 PL_ppid = (IV)getppid();
4698 /* touch @F array to prevent spurious warnings 20020415 MJD */
4700 (void) get_av("main::F", TRUE | GV_ADDMULTI);
4705 S_init_perllib(pTHX)
4711 s = PerlEnv_getenv("PERL5LIB");
4713 * It isn't possible to delete an environment variable with
4714 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4715 * case we treat PERL5LIB as undefined if it has a zero-length value.
4717 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4718 if (s && *s != '\0')
4722 incpush(s, TRUE, TRUE, TRUE, FALSE);
4724 incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE);
4726 /* Treat PERL5?LIB as a possible search list logical name -- the
4727 * "natural" VMS idiom for a Unix path string. We allow each
4728 * element to be a set of |-separated directories for compatibility.
4732 if (my_trnlnm("PERL5LIB",buf,0))
4733 do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx));
4735 while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE);
4739 /* Use the ~-expanded versions of APPLLIB (undocumented),
4740 ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB
4743 incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE);
4747 incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4749 #ifdef MACOS_TRADITIONAL
4752 SV * privdir = newSV(0);
4753 char * macperl = PerlEnv_getenv("MACPERL");
4758 Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl);
4759 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4760 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4761 Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl);
4762 if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode))
4763 incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE);
4765 SvREFCNT_dec(privdir);
4768 incpush(":", FALSE, FALSE, TRUE, FALSE);
4771 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4774 incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE);
4776 incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4780 /* sitearch is always relative to sitelib on Windows for
4781 * DLL-based path intuition to work correctly */
4782 # if !defined(WIN32)
4783 incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4789 /* this picks up sitearch as well */
4790 incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE);
4792 incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE);
4796 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4797 /* Search for version-specific dirs below here */
4798 incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE);
4801 #ifdef PERL_VENDORARCH_EXP
4802 /* vendorarch is always relative to vendorlib on Windows for
4803 * DLL-based path intuition to work correctly */
4804 # if !defined(WIN32)
4805 incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE);
4809 #ifdef PERL_VENDORLIB_EXP
4811 incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */
4813 incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE);
4817 #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */
4818 incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE);
4821 #ifdef PERL_OTHERLIBDIRS
4822 incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE);
4826 incpush(".", FALSE, FALSE, TRUE, FALSE);
4827 #endif /* MACOS_TRADITIONAL */
4830 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4831 # define PERLLIB_SEP ';'
4834 # define PERLLIB_SEP '|'
4836 # if defined(MACOS_TRADITIONAL)
4837 # define PERLLIB_SEP ','
4839 # define PERLLIB_SEP ':'
4843 #ifndef PERLLIB_MANGLE
4844 # define PERLLIB_MANGLE(s,n) (s)
4847 /* Push a directory onto @INC if it exists.
4848 Generate a new SV if we do this, to save needing to copy the SV we push
4851 S_incpush_if_exists(pTHX_ SV *dir)
4855 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4856 S_ISDIR(tmpstatbuf.st_mode)) {
4857 av_push(GvAVn(PL_incgv), dir);
4864 S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep,
4869 const char *p = dir;
4874 if (addsubdirs || addoldvers) {
4878 /* Break at all separators */
4880 SV *libdir = newSV(0);
4883 /* skip any consecutive separators */
4885 while ( *p == PERLLIB_SEP ) {
4886 /* Uncomment the next line for PATH semantics */
4887 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4892 if ( usesep && (s = strchr(p, PERLLIB_SEP)) != NULL ) {
4893 sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)),
4898 sv_setpv(libdir, PERLLIB_MANGLE(p, 0));
4899 p = NULL; /* break out */
4901 #ifdef MACOS_TRADITIONAL
4902 if (!strchr(SvPVX(libdir), ':')) {
4905 sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0));
4907 if (SvPVX(libdir)[SvCUR(libdir)-1] != ':')
4908 sv_catpvs(libdir, ":");
4911 /* Do the if() outside the #ifdef to avoid warnings about an unused
4914 #ifdef PERL_RELOCATABLE_INC
4916 * Relocatable include entries are marked with a leading .../
4919 * 0: Remove that leading ".../"
4920 * 1: Remove trailing executable name (anything after the last '/')
4921 * from the perl path to give a perl prefix
4923 * While the @INC element starts "../" and the prefix ends with a real
4924 * directory (ie not . or ..) chop that real directory off the prefix
4925 * and the leading "../" from the @INC element. ie a logical "../"
4927 * Finally concatenate the prefix and the remainder of the @INC element
4928 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4929 * generates /usr/local/lib/perl5
4931 const char *libpath = SvPVX(libdir);
4932 STRLEN libpath_len = SvCUR(libdir);
4933 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4935 SV * const caret_X = get_sv("\030", 0);
4936 /* Going to use the SV just as a scratch buffer holding a C
4942 /* $^X is *the* source of taint if tainting is on, hence
4943 SvPOK() won't be true. */
4945 assert(SvPOKp(caret_X));
4946 prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X));
4947 /* Firstly take off the leading .../
4948 If all else fail we'll do the paths relative to the current
4950 sv_chop(libdir, libpath + 4);
4951 /* Don't use SvPV as we're intentionally bypassing taining,
4952 mortal copies that the mg_get of tainting creates, and
4953 corruption that seems to come via the save stack.
4954 I guess that the save stack isn't correctly set up yet. */
4955 libpath = SvPVX(libdir);
4956 libpath_len = SvCUR(libdir);
4958 /* This would work more efficiently with memrchr, but as it's
4959 only a GNU extension we'd need to probe for it and
4960 implement our own. Not hard, but maybe not worth it? */
4962 prefix = SvPVX(prefix_sv);
4963 lastslash = strrchr(prefix, '/');
4965 /* First time in with the *lastslash = '\0' we just wipe off
4966 the trailing /perl from (say) /usr/foo/bin/perl
4970 while ((*lastslash = '\0'), /* Do that, come what may. */
4971 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4972 && (lastslash = strrchr(prefix, '/')))) {
4973 if (lastslash[1] == '\0'
4974 || (lastslash[1] == '.'
4975 && (lastslash[2] == '/' /* ends "/." */
4976 || (lastslash[2] == '/'
4977 && lastslash[3] == '/' /* or "/.." */
4979 /* Prefix ends "/" or "/." or "/..", any of which
4980 are fishy, so don't do any more logical cleanup.
4984 /* Remove leading "../" from path */
4987 /* Next iteration round the loop removes the last
4988 directory name from prefix by writing a '\0' in
4989 the while clause. */
4991 /* prefix has been terminated with a '\0' to the correct
4992 length. libpath points somewhere into the libdir SV.
4993 We need to join the 2 with '/' and drop the result into
4995 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4996 SvREFCNT_dec(libdir);
4997 /* And this is the new libdir. */
5000 (PL_uid != PL_euid || PL_gid != PL_egid)) {
5001 /* Need to taint reloccated paths if running set ID */
5002 SvTAINTED_on(libdir);
5005 SvREFCNT_dec(prefix_sv);
5010 * BEFORE pushing libdir onto @INC we may first push version- and
5011 * archname-specific sub-directories.
5013 if (addsubdirs || addoldvers) {
5014 #ifdef PERL_INC_VERSION_LIST
5015 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
5016 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
5017 const char * const *incver;
5023 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
5025 while (unix[len-1] == '/') len--; /* Cosmetic */
5026 sv_usepvn(libdir,unix,len);
5029 PerlIO_printf(Perl_error_log,
5030 "Failed to unixify @INC element \"%s\"\n",
5034 #ifdef MACOS_TRADITIONAL
5035 #define PERL_AV_SUFFIX_FMT ""
5036 #define PERL_ARCH_FMT "%s:"
5037 #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT
5039 #define PERL_AV_SUFFIX_FMT "/"
5040 #define PERL_ARCH_FMT "/%s"
5041 #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT
5043 /* .../version/archname if -d .../version/archname */
5044 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT,
5046 (int)PERL_REVISION, (int)PERL_VERSION,
5047 (int)PERL_SUBVERSION, ARCHNAME);
5048 subdir = S_incpush_if_exists(aTHX_ subdir);
5050 /* .../version if -d .../version */
5051 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH,
5053 (int)PERL_REVISION, (int)PERL_VERSION,
5054 (int)PERL_SUBVERSION);
5055 subdir = S_incpush_if_exists(aTHX_ subdir);
5057 /* .../archname if -d .../archname */
5058 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5059 SVfARG(libdir), ARCHNAME);
5060 subdir = S_incpush_if_exists(aTHX_ subdir);
5064 #ifdef PERL_INC_VERSION_LIST
5066 for (incver = incverlist; *incver; incver++) {
5067 /* .../xxx if -d .../xxx */
5068 Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT,
5069 SVfARG(libdir), *incver);
5070 subdir = S_incpush_if_exists(aTHX_ subdir);
5076 /* finally push this lib directory on the end of @INC */
5077 av_push(GvAVn(PL_incgv), libdir);
5080 assert (SvREFCNT(subdir) == 1);
5081 SvREFCNT_dec(subdir);
5087 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5091 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5097 while (av_len(paramList) >= 0) {
5098 cv = (CV*)av_shift(paramList);
5100 if (paramList == PL_beginav) {
5101 /* save PL_beginav for compiler */
5102 Perl_av_create_and_push(aTHX_ &PL_beginav_save, (SV*)cv);
5104 else if (paramList == PL_checkav) {
5105 /* save PL_checkav for compiler */
5106 Perl_av_create_and_push(aTHX_ &PL_checkav_save, (SV*)cv);
5108 else if (paramList == PL_unitcheckav) {
5109 /* save PL_unitcheckav for compiler */
5110 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, (SV*)cv);
5121 PL_madskills |= 16384;
5126 PL_madskills &= ~16384;
5129 (void)SvPV_const(atsv, len);
5131 PL_curcop = &PL_compiling;
5132 CopLINE_set(PL_curcop, oldline);
5133 if (paramList == PL_beginav)
5134 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5136 Perl_sv_catpvf(aTHX_ atsv,
5137 "%s failed--call queue aborted",
5138 paramList == PL_checkav ? "CHECK"
5139 : paramList == PL_initav ? "INIT"
5140 : paramList == PL_unitcheckav ? "UNITCHECK"
5142 while (PL_scopestack_ix > oldscope)
5145 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5152 /* my_exit() was called */
5153 while (PL_scopestack_ix > oldscope)
5156 PL_curstash = PL_defstash;
5157 PL_curcop = &PL_compiling;
5158 CopLINE_set(PL_curcop, oldline);
5160 if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) {
5161 if (paramList == PL_beginav)
5162 Perl_croak(aTHX_ "BEGIN failed--compilation aborted");
5164 Perl_croak(aTHX_ "%s failed--call queue aborted",
5165 paramList == PL_checkav ? "CHECK"
5166 : paramList == PL_initav ? "INIT"
5167 : paramList == PL_unitcheckav ? "UNITCHECK"
5174 PL_curcop = &PL_compiling;
5175 CopLINE_set(PL_curcop, oldline);
5178 PerlIO_printf(Perl_error_log, "panic: restartop\n");
5187 Perl_my_exit(pTHX_ U32 status)
5190 DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n",
5191 (void*)thr, (unsigned long) status));
5200 STATUS_EXIT_SET(status);
5207 Perl_my_failure_exit(pTHX)
5211 /* We have been called to fall on our sword. The desired exit code
5212 * should be already set in STATUS_UNIX, but could be shifted over
5213 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5216 * If an error code has not been set, then force the issue.
5218 if (MY_POSIX_EXIT) {
5220 /* In POSIX_EXIT mode follow Perl documentations and use 255 for
5221 * the exit code when there isn't an error.
5224 if (STATUS_UNIX == 0)
5225 STATUS_UNIX_EXIT_SET(255);
5227 STATUS_UNIX_EXIT_SET(STATUS_UNIX);
5229 /* The exit code could have been set by $? or vmsish which
5230 * means that it may not be fatal. So convert
5231 * success/warning codes to fatal.
5233 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0)
5234 STATUS_UNIX_EXIT_SET(255);
5238 /* Traditionally Perl on VMS always expects a Fatal Error. */
5239 if (vaxc$errno & 1) {
5241 /* So force success status to failure */
5242 if (STATUS_NATIVE & 1)
5247 STATUS_UNIX = EINTR; /* In case something cares */
5252 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5254 /* Encode the severity code */
5255 severity = STATUS_NATIVE & STS$M_SEVERITY;
5256 STATUS_UNIX = (severity ? severity : 1) << 8;
5258 /* Perl expects this to be a fatal error */
5259 if (severity != STS$K_SEVERE)
5268 STATUS_UNIX_SET(errno);
5270 exitstatus = STATUS_UNIX >> 8;
5271 if (exitstatus & 255)
5272 STATUS_UNIX_SET(exitstatus);
5274 STATUS_UNIX_SET(255);
5281 S_my_exit_jump(pTHX)
5286 SvREFCNT_dec(PL_e_script);
5290 POPSTACK_TO(PL_mainstack);
5298 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5301 const char * const p = SvPVX_const(PL_e_script);
5302 const char *nl = strchr(p, '\n');
5304 PERL_UNUSED_ARG(idx);
5305 PERL_UNUSED_ARG(maxlen);
5307 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5309 filter_del(read_e_script);
5312 sv_catpvn(buf_sv, p, nl-p);
5313 sv_chop(PL_e_script, nl);
5319 * c-indentation-style: bsd
5321 * indent-tabs-mode: t
5324 * ex: set ts=8 sts=4 sw=4 noet: