4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 by Larry Wall
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
28 #define PERL_IN_PERL_C
30 #include "patchlevel.h" /* for local_patches */
37 /* XXX If this causes problems, set i_unistd=undef in the hint file. */
42 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
44 # include <sys/wait.h>
52 char control[CMSG_SPACE(sizeof(int))];
69 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
70 char *getenv (char *); /* Usually in <stdlib.h> */
73 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
75 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
76 /* Drop everything. Heck, don't even try to call it */
77 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
79 /* Drop almost everything */
80 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
83 #define CALL_BODY_EVAL(myop) \
84 if (PL_op == (myop)) \
85 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
89 #define CALL_BODY_SUB(myop) \
90 if (PL_op == (myop)) \
91 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
95 #define CALL_LIST_BODY(cv) \
96 PUSHMARK(PL_stack_sp); \
97 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD);
100 S_init_tls_and_interp(PerlInterpreter *my_perl)
104 PERL_SET_INTERP(my_perl);
105 #if defined(USE_ITHREADS)
108 PERL_SET_THX(my_perl);
111 MUTEX_INIT(&PL_dollarzero_mutex);
112 MUTEX_INIT(&PL_my_ctx_mutex);
115 #if defined(USE_ITHREADS)
118 /* This always happens for non-ithreads */
121 PERL_SET_THX(my_perl);
126 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
129 Perl_sys_init(int* argc, char*** argv)
133 PERL_ARGS_ASSERT_SYS_INIT;
135 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
136 PERL_UNUSED_ARG(argv);
137 PERL_SYS_INIT_BODY(argc, argv);
141 Perl_sys_init3(int* argc, char*** argv, char*** env)
145 PERL_ARGS_ASSERT_SYS_INIT3;
147 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
148 PERL_UNUSED_ARG(argv);
149 PERL_UNUSED_ARG(env);
150 PERL_SYS_INIT3_BODY(argc, argv, env);
157 if (!PL_veto_cleanup) {
158 PERL_SYS_TERM_BODY();
163 #ifdef PERL_IMPLICIT_SYS
165 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
166 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
167 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
168 struct IPerlDir* ipD, struct IPerlSock* ipS,
169 struct IPerlProc* ipP)
171 PerlInterpreter *my_perl;
173 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
175 /* Newx() needs interpreter, so call malloc() instead */
176 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
177 S_init_tls_and_interp(my_perl);
178 Zero(my_perl, 1, PerlInterpreter);
188 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
195 =head1 Embedding Functions
197 =for apidoc perl_alloc
199 Allocates a new Perl interpreter. See L<perlembed>.
207 PerlInterpreter *my_perl;
209 /* Newx() needs interpreter, so call malloc() instead */
210 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
212 S_init_tls_and_interp(my_perl);
213 #ifndef PERL_TRACK_MEMPOOL
214 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
216 Zero(my_perl, 1, PerlInterpreter);
217 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
221 #endif /* PERL_IMPLICIT_SYS */
224 =for apidoc perl_construct
226 Initializes a new Perl interpreter. See L<perlembed>.
232 perl_construct(pTHXx)
236 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
240 PL_perl_destruct_level = 1;
242 PERL_UNUSED_ARG(my_perl);
243 if (PL_perl_destruct_level > 0)
246 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
248 /* set read-only and try to insure than we wont see REFCNT==0
251 SvREADONLY_on(&PL_sv_undef);
252 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
254 sv_setpv(&PL_sv_no,PL_No);
255 /* value lookup in void context - happens to have the side effect
256 of caching the numeric forms. However, as &PL_sv_no doesn't contain
257 a string that is a valid numer, we have to turn the public flags by
263 SvREADONLY_on(&PL_sv_no);
264 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
266 sv_setpv(&PL_sv_yes,PL_Yes);
269 SvREADONLY_on(&PL_sv_yes);
270 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
272 SvREADONLY_on(&PL_sv_placeholder);
273 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
275 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
276 #ifdef PERL_USES_PL_PIDSTATUS
277 PL_pidstatus = newHV();
280 PL_rs = newSVpvs("\n");
290 SET_NUMERIC_STANDARD();
292 #if defined(LOCAL_PATCH_COUNT)
293 PL_localpatches = local_patches; /* For possible -v */
296 #ifdef HAVE_INTERP_INTERN
300 PerlIO_init(aTHX); /* Hook to IO system */
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
306 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
307 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
309 /* First entry is a list of empty elements. It needs to be initialised
310 else all hell breaks loose in S_find_uninit_var(). */
311 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
312 PL_regex_pad = AvARRAY(PL_regex_padav);
314 #ifdef USE_REENTRANT_API
315 Perl_reentrant_init(aTHX);
318 /* Note that strtab is a rather special HV. Assumptions are made
319 about not iterating on it, and not adding tie magic to it.
320 It is properly deallocated in perl_destruct() */
323 HvSHAREKEYS_off(PL_strtab); /* mandatory */
324 hv_ksplit(PL_strtab, 512);
326 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
327 _dyld_lookup_and_bind
328 ("__environ", (unsigned long *) &environ_pointer, NULL);
332 # ifdef USE_ENVIRON_ARRAY
333 PL_origenviron = environ;
337 /* Use sysconf(_SC_CLK_TCK) if available, if not
338 * available or if the sysconf() fails, use the HZ.
339 * BeOS has those, but returns the wrong value.
340 * The HZ if not originally defined has been by now
341 * been defined as CLK_TCK, if available. */
342 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
343 PL_clocktick = sysconf(_SC_CLK_TCK);
344 if (PL_clocktick <= 0)
348 PL_stashcache = newHV();
350 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
351 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
354 if (!PL_mmap_page_size) {
355 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
357 SETERRNO(0, SS_NORMAL);
359 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
361 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
363 if ((long) PL_mmap_page_size < 0) {
365 SV * const error = ERRSV;
366 SvUPGRADE(error, SVt_PV);
367 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
370 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
374 # ifdef HAS_GETPAGESIZE
375 PL_mmap_page_size = getpagesize();
377 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
378 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
382 if (PL_mmap_page_size <= 0)
383 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
384 (IV) PL_mmap_page_size);
386 #endif /* HAS_MMAP */
388 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
389 PL_timesbase.tms_utime = 0;
390 PL_timesbase.tms_stime = 0;
391 PL_timesbase.tms_cutime = 0;
392 PL_timesbase.tms_cstime = 0;
395 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
397 PL_registered_mros = newHV();
398 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
399 HvMAX(PL_registered_mros) = 0;
405 =for apidoc nothreadhook
407 Stub that provides thread hook for perl_destruct when there are
414 Perl_nothreadhook(pTHX)
420 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
422 Perl_dump_sv_child(pTHX_ SV *sv)
425 const int sock = PL_dumper_fd;
426 const int debug_fd = PerlIO_fileno(Perl_debug_log);
427 union control_un control;
430 struct cmsghdr *cmptr;
432 unsigned char buffer[256];
434 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
436 if(sock == -1 || debug_fd == -1)
439 PerlIO_flush(Perl_debug_log);
441 /* All these shenanigans are to pass a file descriptor over to our child for
442 it to dump out to. We can't let it hold open the file descriptor when it
443 forks, as the file descriptor it will dump to can turn out to be one end
444 of pipe that some other process will wait on for EOF. (So as it would
445 be open, the wait would be forever.) */
447 msg.msg_control = control.control;
448 msg.msg_controllen = sizeof(control.control);
449 /* We're a connected socket so we don't need a destination */
455 cmptr = CMSG_FIRSTHDR(&msg);
456 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
457 cmptr->cmsg_level = SOL_SOCKET;
458 cmptr->cmsg_type = SCM_RIGHTS;
459 *((int *)CMSG_DATA(cmptr)) = 1;
461 vec[0].iov_base = (void*)&sv;
462 vec[0].iov_len = sizeof(sv);
463 got = sendmsg(sock, &msg, 0);
466 perror("Debug leaking scalars parent sendmsg failed");
469 if(got < sizeof(sv)) {
470 perror("Debug leaking scalars parent short sendmsg");
474 /* Return protocol is
476 unsigned char: length of location string (0 for empty)
477 unsigned char*: string (not terminated)
479 vec[0].iov_base = (void*)&returned_errno;
480 vec[0].iov_len = sizeof(returned_errno);
481 vec[1].iov_base = buffer;
484 got = readv(sock, vec, 2);
487 perror("Debug leaking scalars parent read failed");
488 PerlIO_flush(PerlIO_stderr());
491 if(got < sizeof(returned_errno) + 1) {
492 perror("Debug leaking scalars parent short read");
493 PerlIO_flush(PerlIO_stderr());
498 got = read(sock, buffer + 1, *buffer);
500 perror("Debug leaking scalars parent read 2 failed");
501 PerlIO_flush(PerlIO_stderr());
506 perror("Debug leaking scalars parent short read 2");
507 PerlIO_flush(PerlIO_stderr());
512 if (returned_errno || *buffer) {
513 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
514 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
515 returned_errno, strerror(returned_errno));
521 =for apidoc perl_destruct
523 Shuts down a Perl interpreter. See L<perlembed>.
532 VOL signed char destruct_level; /* see possible values in intrpvar.h */
534 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
538 PERL_ARGS_ASSERT_PERL_DESTRUCT;
540 PERL_UNUSED_ARG(my_perl);
543 assert(PL_scopestack_ix == 1);
545 /* wait for all pseudo-forked children to finish */
546 PERL_WAIT_FOR_CHILDREN;
548 destruct_level = PL_perl_destruct_level;
551 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
553 const int i = atoi(s);
554 if (destruct_level < i)
560 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
566 if (PL_endav && !PL_minus_c)
567 call_list(PL_scopestack_ix, PL_endav);
572 assert(PL_scopestack_ix == 0);
574 /* Need to flush since END blocks can produce output */
577 if (PL_threadhook(aTHX)) {
578 /* Threads hook has vetoed further cleanup */
579 PL_veto_cleanup = TRUE;
583 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
584 if (destruct_level != 0) {
585 /* Fork here to create a child. Our child's job is to preserve the
586 state of scalars prior to destruction, so that we can instruct it
587 to dump any scalars that we later find have leaked.
588 There's no subtlety in this code - it assumes POSIX, and it doesn't
592 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
593 perror("Debug leaking scalars socketpair failed");
599 perror("Debug leaking scalars fork failed");
603 /* We are the child */
604 const int sock = fd[1];
605 const int debug_fd = PerlIO_fileno(Perl_debug_log);
608 /* Our success message is an integer 0, and a char 0 */
609 static const char success[sizeof(int) + 1] = {0};
613 /* We need to close all other file descriptors otherwise we end up
614 with interesting hangs, where the parent closes its end of a
615 pipe, and sits waiting for (another) child to terminate. Only
616 that child never terminates, because it never gets EOF, because
617 we also have the far end of the pipe open. We even need to
618 close the debugging fd, because sometimes it happens to be one
619 end of a pipe, and a process is waiting on the other end for
620 EOF. Normally it would be closed at some point earlier in
621 destruction, but if we happen to cause the pipe to remain open,
622 EOF never occurs, and we get an infinite hang. Hence all the
623 games to pass in a file descriptor if it's actually needed. */
625 f = sysconf(_SC_OPEN_MAX);
627 where = "sysconf failed";
638 union control_un control;
641 struct cmsghdr *cmptr;
645 msg.msg_control = control.control;
646 msg.msg_controllen = sizeof(control.control);
647 /* We're a connected socket so we don't need a source */
651 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
653 vec[0].iov_base = (void*)⌖
654 vec[0].iov_len = sizeof(target);
656 got = recvmsg(sock, &msg, 0);
661 where = "recv failed";
664 if(got < sizeof(target)) {
665 where = "short recv";
669 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
673 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
674 where = "wrong cmsg_len";
677 if(cmptr->cmsg_level != SOL_SOCKET) {
678 where = "wrong cmsg_level";
681 if(cmptr->cmsg_type != SCM_RIGHTS) {
682 where = "wrong cmsg_type";
686 got_fd = *(int*)CMSG_DATA(cmptr);
687 /* For our last little bit of trickery, put the file descriptor
688 back into Perl_debug_log, as if we never actually closed it
690 if(got_fd != debug_fd) {
691 if (dup2(got_fd, debug_fd) == -1) {
698 PerlIO_flush(Perl_debug_log);
700 got = write(sock, &success, sizeof(success));
703 where = "write failed";
706 if(got < sizeof(success)) {
707 where = "short write";
714 int send_errno = errno;
715 unsigned char length = (unsigned char) strlen(where);
716 struct iovec failure[3] = {
717 {(void*)&send_errno, sizeof(send_errno)},
719 {(void*)where, length}
721 int got = writev(sock, failure, 3);
722 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
723 in the parent if we try to read from the socketpair after the
724 child has exited, even if there was data to read.
725 So sleep a bit to give the parent a fighting chance of
728 _exit((got == -1) ? errno : 0);
732 PL_dumper_fd = fd[0];
737 /* We must account for everything. */
739 /* Destroy the main CV and syntax tree */
740 /* Do this now, because destroying ops can cause new SVs to be generated
741 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
742 PL_curcop to point to a valid op from which the filename structure
744 PL_curcop = &PL_compiling;
746 /* ensure comppad/curpad to refer to main's pad */
747 if (CvPADLIST(PL_main_cv)) {
748 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
750 op_free(PL_main_root);
753 PL_main_start = NULL;
754 /* note that PL_main_cv isn't usually actually freed at this point,
755 * due to the CvOUTSIDE refs from subs compiled within it. It will
756 * get freed once all the subs are freed in sv_clean_all(), for
757 * destruct_level > 0 */
758 SvREFCNT_dec(PL_main_cv);
762 /* Tell PerlIO we are about to tear things apart in case
763 we have layers which are using resources that should
767 PerlIO_destruct(aTHX);
769 if (PL_sv_objcount) {
771 * Try to destruct global references. We do this first so that the
772 * destructors and destructees still exist. Some sv's might remain.
773 * Non-referenced objects are on their own.
779 /* unhook hooks which will soon be, or use, destroyed data */
780 SvREFCNT_dec(PL_warnhook);
782 SvREFCNT_dec(PL_diehook);
785 /* call exit list functions */
786 while (PL_exitlistlen-- > 0)
787 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
789 Safefree(PL_exitlist);
794 SvREFCNT_dec(PL_registered_mros);
796 /* jettison our possibly duplicated environment */
797 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
798 * so we certainly shouldn't free it here
801 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
802 if (environ != PL_origenviron && !PL_use_safe_putenv
804 /* only main thread can free environ[0] contents */
805 && PL_curinterp == aTHX
811 for (i = 0; environ[i]; i++)
812 safesysfree(environ[i]);
814 /* Must use safesysfree() when working with environ. */
815 safesysfree(environ);
817 environ = PL_origenviron;
820 #endif /* !PERL_MICRO */
822 if (destruct_level == 0) {
824 DEBUG_P(debprofdump());
826 #if defined(PERLIO_LAYERS)
827 /* No more IO - including error messages ! */
828 PerlIO_cleanup(aTHX);
831 CopFILE_free(&PL_compiling);
832 CopSTASH_free(&PL_compiling);
834 /* The exit() function will do everything that needs doing. */
839 /* the syntax tree is shared between clones
840 * so op_free(PL_main_root) only ReREFCNT_dec's
841 * REGEXPs in the parent interpreter
842 * we need to manually ReREFCNT_dec for the clones
844 SvREFCNT_dec(PL_regex_padav);
845 PL_regex_padav = NULL;
849 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
850 PL_stashcache = NULL;
852 /* loosen bonds of global variables */
854 /* XXX can PL_parser still be non-null here? */
855 if(PL_parser && PL_parser->rsfp) {
856 (void)PerlIO_close(PL_parser->rsfp);
857 PL_parser->rsfp = NULL;
861 Safefree(PL_splitstr);
871 PL_doswitches = FALSE;
872 PL_dowarn = G_WARN_OFF;
873 PL_doextract = FALSE;
874 PL_sawampersand = FALSE; /* must save all match strings */
877 Safefree(PL_inplace);
879 SvREFCNT_dec(PL_patchlevel);
880 SvREFCNT_dec(PL_apiversion);
883 SvREFCNT_dec(PL_e_script);
889 /* magical thingies */
891 SvREFCNT_dec(PL_ofsgv); /* *, */
894 SvREFCNT_dec(PL_ors_sv); /* $\ */
897 SvREFCNT_dec(PL_rs); /* $/ */
900 Safefree(PL_osname); /* $^O */
903 SvREFCNT_dec(PL_statname);
907 /* defgv, aka *_ should be taken care of elsewhere */
909 /* clean up after study() */
910 SvREFCNT_dec(PL_lastscream);
911 PL_lastscream = NULL;
912 Safefree(PL_screamfirst);
914 Safefree(PL_screamnext);
918 Safefree(PL_efloatbuf);
922 /* startup and shutdown function lists */
923 SvREFCNT_dec(PL_beginav);
924 SvREFCNT_dec(PL_beginav_save);
925 SvREFCNT_dec(PL_endav);
926 SvREFCNT_dec(PL_checkav);
927 SvREFCNT_dec(PL_checkav_save);
928 SvREFCNT_dec(PL_unitcheckav);
929 SvREFCNT_dec(PL_unitcheckav_save);
930 SvREFCNT_dec(PL_initav);
932 PL_beginav_save = NULL;
935 PL_checkav_save = NULL;
936 PL_unitcheckav = NULL;
937 PL_unitcheckav_save = NULL;
940 /* shortcuts just get cleared */
949 PL_last_in_gv = NULL;
961 SvREFCNT_dec(PL_argvout_stack);
962 PL_argvout_stack = NULL;
964 SvREFCNT_dec(PL_modglobal);
966 SvREFCNT_dec(PL_preambleav);
967 PL_preambleav = NULL;
968 SvREFCNT_dec(PL_subname);
970 #ifdef PERL_USES_PL_PIDSTATUS
971 SvREFCNT_dec(PL_pidstatus);
974 SvREFCNT_dec(PL_toptarget);
976 SvREFCNT_dec(PL_bodytarget);
977 PL_bodytarget = NULL;
978 PL_formtarget = NULL;
980 /* free locale stuff */
981 #ifdef USE_LOCALE_COLLATE
982 Safefree(PL_collation_name);
983 PL_collation_name = NULL;
986 #ifdef USE_LOCALE_NUMERIC
987 Safefree(PL_numeric_name);
988 PL_numeric_name = NULL;
989 SvREFCNT_dec(PL_numeric_radix_sv);
990 PL_numeric_radix_sv = NULL;
993 /* clear utf8 character classes */
994 SvREFCNT_dec(PL_utf8_alnum);
995 SvREFCNT_dec(PL_utf8_ascii);
996 SvREFCNT_dec(PL_utf8_alpha);
997 SvREFCNT_dec(PL_utf8_space);
998 SvREFCNT_dec(PL_utf8_cntrl);
999 SvREFCNT_dec(PL_utf8_graph);
1000 SvREFCNT_dec(PL_utf8_digit);
1001 SvREFCNT_dec(PL_utf8_upper);
1002 SvREFCNT_dec(PL_utf8_lower);
1003 SvREFCNT_dec(PL_utf8_print);
1004 SvREFCNT_dec(PL_utf8_punct);
1005 SvREFCNT_dec(PL_utf8_xdigit);
1006 SvREFCNT_dec(PL_utf8_mark);
1007 SvREFCNT_dec(PL_utf8_toupper);
1008 SvREFCNT_dec(PL_utf8_totitle);
1009 SvREFCNT_dec(PL_utf8_tolower);
1010 SvREFCNT_dec(PL_utf8_tofold);
1011 SvREFCNT_dec(PL_utf8_idstart);
1012 SvREFCNT_dec(PL_utf8_idcont);
1013 PL_utf8_alnum = NULL;
1014 PL_utf8_ascii = NULL;
1015 PL_utf8_alpha = NULL;
1016 PL_utf8_space = NULL;
1017 PL_utf8_cntrl = NULL;
1018 PL_utf8_graph = NULL;
1019 PL_utf8_digit = NULL;
1020 PL_utf8_upper = NULL;
1021 PL_utf8_lower = NULL;
1022 PL_utf8_print = NULL;
1023 PL_utf8_punct = NULL;
1024 PL_utf8_xdigit = NULL;
1025 PL_utf8_mark = NULL;
1026 PL_utf8_toupper = NULL;
1027 PL_utf8_totitle = NULL;
1028 PL_utf8_tolower = NULL;
1029 PL_utf8_tofold = NULL;
1030 PL_utf8_idstart = NULL;
1031 PL_utf8_idcont = NULL;
1033 if (!specialWARN(PL_compiling.cop_warnings))
1034 PerlMemShared_free(PL_compiling.cop_warnings);
1035 PL_compiling.cop_warnings = NULL;
1036 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1037 PL_compiling.cop_hints_hash = NULL;
1038 CopFILE_free(&PL_compiling);
1039 CopSTASH_free(&PL_compiling);
1041 /* Prepare to destruct main symbol table. */
1044 /* break ref loop *:: <=> %:: */
1045 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1048 SvREFCNT_dec(PL_curstname);
1049 PL_curstname = NULL;
1051 /* clear queued errors */
1052 SvREFCNT_dec(PL_errors);
1055 SvREFCNT_dec(PL_isarev);
1058 if (destruct_level >= 2) {
1059 if (PL_scopestack_ix != 0)
1060 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1061 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1062 (long)PL_scopestack_ix);
1063 if (PL_savestack_ix != 0)
1064 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1065 "Unbalanced saves: %ld more saves than restores\n",
1066 (long)PL_savestack_ix);
1067 if (PL_tmps_floor != -1)
1068 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1069 (long)PL_tmps_floor + 1);
1070 if (cxstack_ix != -1)
1071 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1072 (long)cxstack_ix + 1);
1075 #ifdef PERL_IMPLICIT_CONTEXT
1076 /* the entries in this list are allocated via SV PVX's, so get freed
1077 * in sv_clean_all */
1078 Safefree(PL_my_cxt_list);
1081 /* Now absolutely destruct everything, somehow or other, loops or no. */
1083 /* the 2 is for PL_fdpid and PL_strtab */
1084 while (sv_clean_all() > 2)
1087 AvREAL_off(PL_fdpid); /* no surviving entries */
1088 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1091 #ifdef HAVE_INTERP_INTERN
1095 /* Destruct the global string table. */
1097 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1098 * so that sv_free() won't fail on them.
1099 * Now that the global string table is using a single hunk of memory
1100 * for both HE and HEK, we either need to explicitly unshare it the
1101 * correct way, or actually free things here.
1104 const I32 max = HvMAX(PL_strtab);
1105 HE * const * const array = HvARRAY(PL_strtab);
1106 HE *hent = array[0];
1109 if (hent && ckWARN_d(WARN_INTERNAL)) {
1110 HE * const next = HeNEXT(hent);
1111 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1112 "Unbalanced string table refcount: (%ld) for \"%s\"",
1113 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1120 hent = array[riter];
1125 HvARRAY(PL_strtab) = 0;
1126 HvTOTALKEYS(PL_strtab) = 0;
1128 SvREFCNT_dec(PL_strtab);
1131 /* free the pointer tables used for cloning */
1132 ptr_table_free(PL_ptr_table);
1133 PL_ptr_table = (PTR_TBL_t*)NULL;
1136 /* free special SVs */
1138 SvREFCNT(&PL_sv_yes) = 0;
1139 sv_clear(&PL_sv_yes);
1140 SvANY(&PL_sv_yes) = NULL;
1141 SvFLAGS(&PL_sv_yes) = 0;
1143 SvREFCNT(&PL_sv_no) = 0;
1144 sv_clear(&PL_sv_no);
1145 SvANY(&PL_sv_no) = NULL;
1146 SvFLAGS(&PL_sv_no) = 0;
1150 for (i=0; i<=2; i++) {
1151 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1152 sv_clear(PERL_DEBUG_PAD(i));
1153 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1154 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1158 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1159 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1161 #ifdef DEBUG_LEAKING_SCALARS
1162 if (PL_sv_count != 0) {
1167 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1168 svend = &sva[SvREFCNT(sva)];
1169 for (sv = sva + 1; sv < svend; ++sv) {
1170 if (SvTYPE(sv) != SVTYPEMASK) {
1171 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1173 " refcnt=%"UVuf pTHX__FORMAT "\n"
1174 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1176 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1178 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1180 sv->sv_debug_inpad ? "for" : "by",
1181 sv->sv_debug_optype ?
1182 PL_op_name[sv->sv_debug_optype]: "(none)",
1183 PTR2UV(sv->sv_debug_parent),
1186 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1187 Perl_dump_sv_child(aTHX_ sv);
1193 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1197 /* Wait for up to 4 seconds for child to terminate.
1198 This seems to be the least effort way of timing out on reaping
1200 struct timeval waitfor = {4, 0};
1201 int sock = PL_dumper_fd;
1205 FD_SET(sock, &rset);
1206 select(sock + 1, &rset, NULL, NULL, &waitfor);
1207 waitpid(child, &status, WNOHANG);
1212 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1218 #ifdef PERL_DEBUG_READONLY_OPS
1224 #if defined(PERLIO_LAYERS)
1225 /* No more IO - including error messages ! */
1226 PerlIO_cleanup(aTHX);
1229 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1230 as currently layers use it rather than NULL as a marker
1231 for no arg - and will try and SvREFCNT_dec it.
1233 SvREFCNT(&PL_sv_undef) = 0;
1234 SvREADONLY_off(&PL_sv_undef);
1236 Safefree(PL_origfilename);
1237 PL_origfilename = NULL;
1238 Safefree(PL_reg_start_tmp);
1239 PL_reg_start_tmp = (char**)NULL;
1240 PL_reg_start_tmpl = 0;
1241 Safefree(PL_reg_curpm);
1242 Safefree(PL_reg_poscache);
1243 free_tied_hv_pool();
1244 Safefree(PL_op_mask);
1245 Safefree(PL_psig_name);
1246 PL_psig_name = (SV**)NULL;
1247 PL_psig_ptr = (SV**)NULL;
1249 /* We need to NULL PL_psig_pend first, so that
1250 signal handlers know not to use it */
1251 int *psig_save = PL_psig_pend;
1252 PL_psig_pend = (int*)NULL;
1253 Safefree(psig_save);
1257 PL_tainting = FALSE;
1258 PL_taint_warn = FALSE;
1259 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1262 DEBUG_P(debprofdump());
1264 #ifdef USE_REENTRANT_API
1265 Perl_reentrant_free(aTHX);
1270 while (PL_regmatch_slab) {
1271 regmatch_slab *s = PL_regmatch_slab;
1272 PL_regmatch_slab = PL_regmatch_slab->next;
1276 /* As the absolutely last thing, free the non-arena SV for mess() */
1279 /* we know that type == SVt_PVMG */
1281 /* it could have accumulated taint magic */
1284 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1285 moremagic = mg->mg_moremagic;
1286 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1288 Safefree(mg->mg_ptr);
1292 /* we know that type >= SVt_PV */
1293 SvPV_free(PL_mess_sv);
1294 Safefree(SvANY(PL_mess_sv));
1295 Safefree(PL_mess_sv);
1302 =for apidoc perl_free
1304 Releases a Perl interpreter. See L<perlembed>.
1314 PERL_ARGS_ASSERT_PERL_FREE;
1316 if (PL_veto_cleanup)
1319 #ifdef PERL_TRACK_MEMPOOL
1322 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1323 * value as we're probably hunting memory leaks then
1325 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1326 if (!s || atoi(s) == 0) {
1327 const U32 old_debug = PL_debug;
1328 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1329 thread at thread exit. */
1331 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1332 "free this thread's memory\n");
1333 PL_debug &= ~ DEBUG_m_FLAG;
1335 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1336 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1337 PL_debug = old_debug;
1342 #if defined(WIN32) || defined(NETWARE)
1343 # if defined(PERL_IMPLICIT_SYS)
1346 void *host = nw_internal_host;
1348 void *host = w32_internal_host;
1350 PerlMem_free(aTHXx);
1352 nw_delete_internal_host(host);
1354 win32_delete_internal_host(host);
1358 PerlMem_free(aTHXx);
1361 PerlMem_free(aTHXx);
1365 #if defined(USE_ITHREADS)
1366 /* provide destructors to clean up the thread key when libperl is unloaded */
1367 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1369 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1370 #pragma fini "perl_fini"
1371 #elif defined(__sun) && !defined(__GNUC__)
1372 #pragma fini (perl_fini)
1376 #if defined(__GNUC__)
1377 __attribute__((destructor))
1382 if (PL_curinterp && !PL_veto_cleanup)
1387 #endif /* THREADS */
1390 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1393 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1394 PL_exitlist[PL_exitlistlen].fn = fn;
1395 PL_exitlist[PL_exitlistlen].ptr = ptr;
1399 #ifdef HAS_PROCSELFEXE
1400 /* This is a function so that we don't hold on to MAXPATHLEN
1401 bytes of stack longer than necessary
1404 S_procself_val(pTHX_ SV *sv, const char *arg0)
1406 char buf[MAXPATHLEN];
1407 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1409 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1410 includes a spurious NUL which will cause $^X to fail in system
1411 or backticks (this will prevent extensions from being built and
1412 many tests from working). readlink is not meant to add a NUL.
1413 Normal readlink works fine.
1415 if (len > 0 && buf[len-1] == '\0') {
1419 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1420 returning the text "unknown" from the readlink rather than the path
1421 to the executable (or returning an error from the readlink). Any valid
1422 path has a '/' in it somewhere, so use that to validate the result.
1423 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1425 if (len > 0 && memchr(buf, '/', len)) {
1426 sv_setpvn(sv,buf,len);
1432 #endif /* HAS_PROCSELFEXE */
1435 S_set_caret_X(pTHX) {
1437 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1439 #ifdef HAS_PROCSELFEXE
1440 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1443 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1445 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1452 =for apidoc perl_parse
1454 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1460 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1467 PERL_ARGS_ASSERT_PERL_PARSE;
1468 #ifndef MULTIPLICITY
1469 PERL_UNUSED_ARG(my_perl);
1472 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1473 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1474 * This MUST be done before any hash stores or fetches take place.
1475 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1476 * yourself, it is your responsibility to provide a good random seed!
1477 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1478 if (!PL_rehash_seed_set)
1479 PL_rehash_seed = get_hash_seed();
1481 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1483 if (s && (atoi(s) == 1))
1484 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1486 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1491 if (PL_origalen != 0) {
1492 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1495 /* Set PL_origalen be the sum of the contiguous argv[]
1496 * elements plus the size of the env in case that it is
1497 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1498 * as the maximum modifiable length of $0. In the worst case
1499 * the area we are able to modify is limited to the size of
1500 * the original argv[0]. (See below for 'contiguous', though.)
1502 const char *s = NULL;
1505 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1506 /* Do the mask check only if the args seem like aligned. */
1508 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1510 /* See if all the arguments are contiguous in memory. Note
1511 * that 'contiguous' is a loose term because some platforms
1512 * align the argv[] and the envp[]. If the arguments look
1513 * like non-aligned, assume that they are 'strictly' or
1514 * 'traditionally' contiguous. If the arguments look like
1515 * aligned, we just check that they are within aligned
1516 * PTRSIZE bytes. As long as no system has something bizarre
1517 * like the argv[] interleaved with some other data, we are
1518 * fine. (Did I just evoke Murphy's Law?) --jhi */
1519 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1521 for (i = 1; i < PL_origargc; i++) {
1522 if ((PL_origargv[i] == s + 1
1524 || PL_origargv[i] == s + 2
1529 (PL_origargv[i] > s &&
1531 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1542 #ifndef PERL_USE_SAFE_PUTENV
1543 /* Can we grab env area too to be used as the area for $0? */
1544 if (s && PL_origenviron && !PL_use_safe_putenv) {
1545 if ((PL_origenviron[0] == s + 1)
1548 (PL_origenviron[0] > s &&
1549 PL_origenviron[0] <=
1550 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1553 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1554 s = PL_origenviron[0];
1557 my_setenv("NoNe SuCh", NULL);
1558 /* Force copy of environment. */
1559 for (i = 1; PL_origenviron[i]; i++) {
1560 if (PL_origenviron[i] == s + 1
1563 (PL_origenviron[i] > s &&
1564 PL_origenviron[i] <=
1565 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1568 s = PL_origenviron[i];
1576 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1578 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1583 /* Come here if running an undumped a.out. */
1585 PL_origfilename = savepv(argv[0]);
1586 PL_do_undump = FALSE;
1587 cxstack_ix = -1; /* start label stack again */
1589 assert (!PL_tainted);
1591 S_set_caret_X(aTHX);
1593 init_postdump_symbols(argc,argv,env);
1598 op_free(PL_main_root);
1599 PL_main_root = NULL;
1601 PL_main_start = NULL;
1602 SvREFCNT_dec(PL_main_cv);
1606 oldscope = PL_scopestack_ix;
1607 PL_dowarn = G_WARN_OFF;
1612 parse_body(env,xsinit);
1614 call_list(oldscope, PL_unitcheckav);
1616 call_list(oldscope, PL_checkav);
1623 /* my_exit() was called */
1624 while (PL_scopestack_ix > oldscope)
1627 PL_curstash = PL_defstash;
1629 call_list(oldscope, PL_unitcheckav);
1631 call_list(oldscope, PL_checkav);
1635 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1643 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1644 miniperl, and we need to see those flags reflected in the values here. */
1646 /* What this returns is subject to change. Use the public interface in Config.
1649 S_Internals_V(pTHX_ CV *cv)
1652 #ifdef LOCAL_PATCH_COUNT
1653 const int local_patch_count = LOCAL_PATCH_COUNT;
1655 const int local_patch_count = 0;
1657 const int entries = 3 + local_patch_count;
1659 static char non_bincompat_options[] =
1666 # ifdef PERL_DISABLE_PMC
1669 # ifdef PERL_DONT_CREATE_GVSV
1670 " PERL_DONT_CREATE_GVSV"
1672 # ifdef PERL_EXTERNAL_GLOB
1673 " PERL_EXTERNAL_GLOB"
1675 # ifdef PERL_IS_MINIPERL
1678 # ifdef PERL_MALLOC_WRAP
1681 # ifdef PERL_MEM_LOG
1684 # ifdef PERL_MEM_LOG_NOIMPL
1685 " PERL_MEM_LOG_NOIMPL"
1687 # ifdef PERL_USE_DEVEL
1690 # ifdef PERL_USE_SAFE_PUTENV
1691 " PERL_USE_SAFE_PUTENV"
1693 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1694 " USE_ATTRIBUTES_FOR_PERLIO"
1696 # ifdef USE_FAST_STDIO
1699 # ifdef USE_PERL_ATOF
1702 # ifdef USE_SITECUSTOMIZE
1703 " USE_SITECUSTOMIZE"
1706 PERL_UNUSED_ARG(cv);
1707 PERL_UNUSED_ARG(items);
1709 EXTEND(SP, entries);
1711 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1712 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1713 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1717 PUSHs(Perl_newSVpvn_flags(aTHX_
1718 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1721 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1725 PUSHs(&PL_sv_undef);
1728 for (i = 1; i <= local_patch_count; i++) {
1729 /* This will be an undef, if PL_localpatches[i] is NULL. */
1730 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1736 #define INCPUSH_UNSHIFT 0x01
1737 #define INCPUSH_ADD_OLD_VERS 0x02
1738 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1739 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1740 #define INCPUSH_NOT_BASEDIR 0x10
1741 #define INCPUSH_CAN_RELOCATE 0x20
1742 #define INCPUSH_ADD_SUB_DIRS \
1743 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1746 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1750 int argc = PL_origargc;
1751 char **argv = PL_origargv;
1752 const char *scriptname = NULL;
1753 VOL bool dosearch = FALSE;
1755 const char *cddir = NULL;
1756 #ifdef USE_SITECUSTOMIZE
1757 bool minus_f = FALSE;
1759 SV *linestr_sv = newSV_type(SVt_PVIV);
1760 bool add_read_e_script = FALSE;
1762 SvGROW(linestr_sv, 80);
1763 sv_setpvs(linestr_sv,"");
1769 for (argc--,argv++; argc > 0; argc--,argv++) {
1770 if (argv[0][0] != '-' || !argv[0][1])
1776 #ifndef PERL_STRICT_CR
1800 if ((s = moreswitches(s)))
1805 CHECK_MALLOC_TOO_LATE_FOR('t');
1806 if( !PL_tainting ) {
1807 PL_taint_warn = TRUE;
1813 CHECK_MALLOC_TOO_LATE_FOR('T');
1815 PL_taint_warn = FALSE;
1823 forbid_setid('e', FALSE);
1825 PL_e_script = newSVpvs("");
1826 add_read_e_script = TRUE;
1829 sv_catpv(PL_e_script, s);
1831 sv_catpv(PL_e_script, argv[1]);
1835 Perl_croak(aTHX_ "No code specified for -%c", c);
1836 sv_catpvs(PL_e_script, "\n");
1840 #ifdef USE_SITECUSTOMIZE
1846 case 'I': /* -I handled both here and in moreswitches() */
1847 forbid_setid('I', FALSE);
1848 if (!*++s && (s=argv[1]) != NULL) {
1852 STRLEN len = strlen(s);
1853 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1856 Perl_croak(aTHX_ "No directory specified for -I");
1859 forbid_setid('S', FALSE);
1868 opts_prog = newSVpvs("use Config; Config::_V()");
1872 opts_prog = Perl_newSVpvf(aTHX_
1873 "use Config; Config::config_vars(qw%c%s%c)",
1877 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1878 /* don't look for script or read stdin */
1879 scriptname = BIT_BUCKET;
1883 PL_doextract = TRUE;
1891 if (!*++s || isSPACE(*s)) {
1895 /* catch use of gnu style long options */
1896 if (strEQ(s, "version")) {
1900 if (strEQ(s, "help")) {
1907 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1918 #ifndef SECURE_INTERNAL_GETENV
1921 (s = PerlEnv_getenv("PERL5OPT")))
1925 if (*s == '-' && *(s+1) == 'T') {
1926 CHECK_MALLOC_TOO_LATE_FOR('T');
1928 PL_taint_warn = FALSE;
1931 char *popt_copy = NULL;
1944 if (!strchr("CDIMUdmtwW", *s))
1945 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1949 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1950 s = popt_copy + (s - d);
1958 if( !PL_tainting ) {
1959 PL_taint_warn = TRUE;
1970 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1972 /* SITELIB_EXP is a function call on Win32.
1973 The games with local $! are to avoid setting errno if there is no
1974 sitecustomize script. */
1975 const char *const sitelib = SITELIB_EXP;
1976 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1978 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1983 scriptname = argv[0];
1986 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1988 else if (scriptname == NULL) {
1990 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1996 /* Set $^X early so that it can be used for relocatable paths in @INC */
1997 assert (!PL_tainted);
1999 S_set_caret_X(aTHX);
2004 bool suidscript = FALSE;
2006 open_script(scriptname, dosearch, &suidscript, &rsfp);
2008 validate_suid(validarg, scriptname, fdscript, suidscript,
2012 # if defined(SIGCHLD) || defined(SIGCLD)
2015 # define SIGCHLD SIGCLD
2017 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2018 if (sigstate == (Sighandler_t) SIG_IGN) {
2019 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2020 "Can't ignore signal CHLD, forcing to default");
2021 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2029 /* This will croak if suidscript is true, as -x cannot be used with
2031 forbid_setid('x', suidscript);
2032 /* Hence you can't get here if suidscript is true */
2034 find_beginning(linestr_sv, rsfp);
2035 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2036 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2040 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2041 CvUNIQUE_on(PL_compcv);
2043 CvPADLIST(PL_compcv) = pad_new(0);
2045 PL_isarev = newHV();
2048 boot_core_UNIVERSAL();
2050 newXS("Internals::V", S_Internals_V, __FILE__);
2053 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2055 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2061 # ifdef HAS_SOCKS5_INIT
2062 socks5_init(argv[0]);
2068 init_predump_symbols();
2069 /* init_postdump_symbols not currently designed to be called */
2070 /* more than once (ENV isn't cleared first, for example) */
2071 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2073 init_postdump_symbols(argc,argv,env);
2075 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2076 * or explicitly in some platforms.
2077 * locale.c:Perl_init_i18nl10n() if the environment
2078 * look like the user wants to use UTF-8. */
2079 #if defined(__SYMBIAN32__)
2080 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2082 # ifndef PERL_IS_MINIPERL
2084 /* Requires init_predump_symbols(). */
2085 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2090 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2091 * and the default open disciplines. */
2092 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2093 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2095 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2096 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2097 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2099 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2100 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2101 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2103 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2104 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2105 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2107 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2108 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2111 sv_setpvs(sv, ":utf8\0:utf8");
2113 sv_setpvs(sv, ":utf8\0");
2116 sv_setpvs(sv, "\0:utf8");
2125 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2126 if (strEQ(s, "unsafe"))
2127 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2128 else if (strEQ(s, "safe"))
2129 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2131 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2138 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2142 PL_xmlfp = PerlIO_stdout();
2144 PL_xmlfp = PerlIO_open(s, "w");
2146 Perl_croak(aTHX_ "Can't open %s", s);
2148 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2154 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2155 PL_madskills = atoi(s);
2156 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2161 lex_start(linestr_sv, rsfp, TRUE);
2162 PL_subname = newSVpvs("main");
2164 if (add_read_e_script)
2165 filter_add(read_e_script, NULL);
2167 /* now parse the script */
2169 SETERRNO(0,SS_NORMAL);
2170 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2172 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2174 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2178 CopLINE_set(PL_curcop, 0);
2179 PL_curstash = PL_defstash;
2181 SvREFCNT_dec(PL_e_script);
2189 SAVECOPFILE(PL_curcop);
2190 SAVECOPLINE(PL_curcop);
2191 gv_check(PL_defstash);
2200 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2201 dump_mstats("after compilation:");
2206 PL_restartjmpenv = NULL;
2212 =for apidoc perl_run
2214 Tells a Perl interpreter to run. See L<perlembed>.
2227 PERL_ARGS_ASSERT_PERL_RUN;
2228 #ifndef MULTIPLICITY
2229 PERL_UNUSED_ARG(my_perl);
2232 oldscope = PL_scopestack_ix;
2240 cxstack_ix = -1; /* start context stack again */
2242 case 0: /* normal completion */
2246 case 2: /* my_exit() */
2247 while (PL_scopestack_ix > oldscope)
2250 PL_curstash = PL_defstash;
2251 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2252 PL_endav && !PL_minus_c)
2253 call_list(oldscope, PL_endav);
2255 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2256 dump_mstats("after execution: ");
2262 POPSTACK_TO(PL_mainstack);
2265 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2276 S_run_body(pTHX_ I32 oldscope)
2279 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2280 PL_sawampersand ? "Enabling" : "Omitting"));
2282 if (!PL_restartop) {
2286 exit(0); /* less likely to core dump than my_exit(0) */
2290 if (DEBUG_x_TEST || DEBUG_B_TEST)
2291 dump_all_perl(!DEBUG_B_TEST);
2293 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2297 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2300 if (PERLDB_SINGLE && PL_DBsingle)
2301 sv_setiv(PL_DBsingle, 1);
2303 call_list(oldscope, PL_initav);
2304 #ifdef PERL_DEBUG_READONLY_OPS
2305 Perl_pending_Slabs_to_ro(aTHX);
2312 PL_restartjmpenv = NULL;
2313 PL_op = PL_restartop;
2317 else if (PL_main_start) {
2318 CvDEPTH(PL_main_cv) = 1;
2319 PL_op = PL_main_start;
2327 =head1 SV Manipulation Functions
2329 =for apidoc p||get_sv
2331 Returns the SV of the specified Perl scalar. C<flags> are passed to
2332 C<gv_fetchpv>. If C<GV_ADD> is set and the
2333 Perl variable does not exist then it will be created. If C<flags> is zero
2334 and the variable does not exist then NULL is returned.
2340 Perl_get_sv(pTHX_ const char *name, I32 flags)
2344 PERL_ARGS_ASSERT_GET_SV;
2346 gv = gv_fetchpv(name, flags, SVt_PV);
2353 =head1 Array Manipulation Functions
2355 =for apidoc p||get_av
2357 Returns the AV of the specified Perl array. C<flags> are passed to
2358 C<gv_fetchpv>. If C<GV_ADD> is set and the
2359 Perl variable does not exist then it will be created. If C<flags> is zero
2360 and the variable does not exist then NULL is returned.
2366 Perl_get_av(pTHX_ const char *name, I32 flags)
2368 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2370 PERL_ARGS_ASSERT_GET_AV;
2380 =head1 Hash Manipulation Functions
2382 =for apidoc p||get_hv
2384 Returns the HV of the specified Perl hash. C<flags> are passed to
2385 C<gv_fetchpv>. If C<GV_ADD> is set and the
2386 Perl variable does not exist then it will be created. If C<flags> is zero
2387 and the variable does not exist then NULL is returned.
2393 Perl_get_hv(pTHX_ const char *name, I32 flags)
2395 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2397 PERL_ARGS_ASSERT_GET_HV;
2407 =head1 CV Manipulation Functions
2409 =for apidoc p||get_cvn_flags
2411 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2412 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2413 exist then it will be declared (which has the same effect as saying
2414 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2415 then NULL is returned.
2417 =for apidoc p||get_cv
2419 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2425 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2427 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2428 /* XXX this is probably not what they think they're getting.
2429 * It has the same effect as "sub name;", i.e. just a forward
2432 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2434 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2435 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2436 return newSUB(start_subparse(FALSE, 0),
2437 newSVOP(OP_CONST, 0, sv),
2445 /* Nothing in core calls this now, but we can't replace it with a macro and
2446 move it to mathoms.c as a macro would evaluate name twice. */
2448 Perl_get_cv(pTHX_ const char *name, I32 flags)
2450 PERL_ARGS_ASSERT_GET_CV;
2452 return get_cvn_flags(name, strlen(name), flags);
2455 /* Be sure to refetch the stack pointer after calling these routines. */
2459 =head1 Callback Functions
2461 =for apidoc p||call_argv
2463 Performs a callback to the specified Perl sub. See L<perlcall>.
2469 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2471 /* See G_* flags in cop.h */
2472 /* null terminated arg list */
2477 PERL_ARGS_ASSERT_CALL_ARGV;
2482 mXPUSHs(newSVpv(*argv,0));
2487 return call_pv(sub_name, flags);
2491 =for apidoc p||call_pv
2493 Performs a callback to the specified Perl sub. See L<perlcall>.
2499 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2500 /* name of the subroutine */
2501 /* See G_* flags in cop.h */
2503 PERL_ARGS_ASSERT_CALL_PV;
2505 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2509 =for apidoc p||call_method
2511 Performs a callback to the specified Perl method. The blessed object must
2512 be on the stack. See L<perlcall>.
2518 Perl_call_method(pTHX_ const char *methname, I32 flags)
2519 /* name of the subroutine */
2520 /* See G_* flags in cop.h */
2523 PERL_ARGS_ASSERT_CALL_METHOD;
2525 len = strlen(methname);
2527 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2528 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2531 /* May be called with any of a CV, a GV, or an SV containing the name. */
2533 =for apidoc p||call_sv
2535 Performs a callback to the Perl sub whose name is in the SV. See
2542 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2543 /* See G_* flags in cop.h */
2546 LOGOP myop; /* fake syntax tree node */
2551 bool oldcatch = CATCH_GET;
2553 OP* const oldop = PL_op;
2556 PERL_ARGS_ASSERT_CALL_SV;
2558 if (flags & G_DISCARD) {
2562 if (!(flags & G_WANT)) {
2563 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2568 Zero(&myop, 1, LOGOP);
2569 myop.op_next = NULL;
2570 if (!(flags & G_NOARGS))
2571 myop.op_flags |= OPf_STACKED;
2572 myop.op_flags |= OP_GIMME_REVERSE(flags);
2576 EXTEND(PL_stack_sp, 1);
2577 *++PL_stack_sp = sv;
2579 oldscope = PL_scopestack_ix;
2581 if (PERLDB_SUB && PL_curstash != PL_debstash
2582 /* Handle first BEGIN of -d. */
2583 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2584 /* Try harder, since this may have been a sighandler, thus
2585 * curstash may be meaningless. */
2586 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2587 && !(flags & G_NODEBUG))
2588 PL_op->op_private |= OPpENTERSUB_DB;
2590 if (flags & G_METHOD) {
2591 Zero(&method_op, 1, UNOP);
2592 method_op.op_next = PL_op;
2593 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2594 method_op.op_type = OP_METHOD;
2595 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2596 myop.op_type = OP_ENTERSUB;
2597 PL_op = (OP*)&method_op;
2600 if (!(flags & G_EVAL)) {
2602 CALL_BODY_SUB((OP*)&myop);
2603 retval = PL_stack_sp - (PL_stack_base + oldmark);
2604 CATCH_SET(oldcatch);
2607 myop.op_other = (OP*)&myop;
2609 create_eval_scope(flags|G_FAKINGEVAL);
2617 CALL_BODY_SUB((OP*)&myop);
2618 retval = PL_stack_sp - (PL_stack_base + oldmark);
2619 if (!(flags & G_KEEPERR)) {
2627 /* my_exit() was called */
2628 PL_curstash = PL_defstash;
2635 PL_restartjmpenv = NULL;
2636 PL_op = PL_restartop;
2640 PL_stack_sp = PL_stack_base + oldmark;
2641 if ((flags & G_WANT) == G_ARRAY)
2645 *++PL_stack_sp = &PL_sv_undef;
2650 if (PL_scopestack_ix > oldscope)
2651 delete_eval_scope();
2655 if (flags & G_DISCARD) {
2656 PL_stack_sp = PL_stack_base + oldmark;
2665 /* Eval a string. The G_EVAL flag is always assumed. */
2668 =for apidoc p||eval_sv
2670 Tells Perl to C<eval> the string in the SV.
2676 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2678 /* See G_* flags in cop.h */
2682 UNOP myop; /* fake syntax tree node */
2683 VOL I32 oldmark = SP - PL_stack_base;
2686 OP* const oldop = PL_op;
2689 PERL_ARGS_ASSERT_EVAL_SV;
2691 if (flags & G_DISCARD) {
2698 Zero(PL_op, 1, UNOP);
2699 EXTEND(PL_stack_sp, 1);
2700 *++PL_stack_sp = sv;
2702 if (!(flags & G_NOARGS))
2703 myop.op_flags = OPf_STACKED;
2704 myop.op_next = NULL;
2705 myop.op_type = OP_ENTEREVAL;
2706 myop.op_flags |= OP_GIMME_REVERSE(flags);
2707 if (flags & G_KEEPERR)
2708 myop.op_flags |= OPf_SPECIAL;
2710 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2711 * before a PUSHEVAL, which corrupts the stack after a croak */
2712 TAINT_PROPER("eval_sv()");
2718 CALL_BODY_EVAL((OP*)&myop);
2719 retval = PL_stack_sp - (PL_stack_base + oldmark);
2720 if (!(flags & G_KEEPERR)) {
2728 /* my_exit() was called */
2729 PL_curstash = PL_defstash;
2736 PL_restartjmpenv = NULL;
2737 PL_op = PL_restartop;
2741 PL_stack_sp = PL_stack_base + oldmark;
2742 if ((flags & G_WANT) == G_ARRAY)
2746 *++PL_stack_sp = &PL_sv_undef;
2752 if (flags & G_DISCARD) {
2753 PL_stack_sp = PL_stack_base + oldmark;
2763 =for apidoc p||eval_pv
2765 Tells Perl to C<eval> the given string and return an SV* result.
2771 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2775 SV* sv = newSVpv(p, 0);
2777 PERL_ARGS_ASSERT_EVAL_PV;
2779 eval_sv(sv, G_SCALAR);
2786 if (croak_on_error && SvTRUE(ERRSV)) {
2787 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2793 /* Require a module. */
2796 =head1 Embedding Functions
2798 =for apidoc p||require_pv
2800 Tells Perl to C<require> the file named by the string argument. It is
2801 analogous to the Perl code C<eval "require '$file'">. It's even
2802 implemented that way; consider using load_module instead.
2807 Perl_require_pv(pTHX_ const char *pv)
2813 PERL_ARGS_ASSERT_REQUIRE_PV;
2815 PUSHSTACKi(PERLSI_REQUIRE);
2817 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2818 eval_sv(sv_2mortal(sv), G_DISCARD);
2824 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2826 /* This message really ought to be max 23 lines.
2827 * Removed -h because the user already knows that option. Others? */
2829 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2830 minimum of 509 character string literals. */
2831 static const char * const usage_msg[] = {
2832 " -0[octal] specify record separator (\\0, if no argument)\n"
2833 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2834 " -C[number/list] enables the listed Unicode features\n"
2835 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2836 " -d[:debugger] run program under debugger\n"
2837 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2838 " -e program one line of program (several -e's allowed, omit programfile)\n"
2839 " -E program like -e, but enables all optional features\n"
2840 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2841 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2842 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2843 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2844 " -l[octal] enable line ending processing, specifies line terminator\n"
2845 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2846 " -n assume \"while (<>) { ... }\" loop around program\n"
2847 " -p assume loop like -n but print line also, like sed\n"
2848 " -s enable rudimentary parsing for switches after programfile\n"
2849 " -S look for programfile using PATH environment variable\n",
2850 " -t enable tainting warnings\n"
2851 " -T enable tainting checks\n"
2852 " -u dump core after parsing program\n"
2853 " -U allow unsafe operations\n"
2854 " -v print version, patchlevel and license\n"
2855 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2856 " -w enable many useful warnings\n"
2857 " -W enable all warnings\n"
2858 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2859 " -X disable all warnings\n"
2861 "Run 'perldoc perl' for more help with Perl.\n\n",
2864 const char * const *p = usage_msg;
2865 PerlIO *out = PerlIO_stdout();
2867 PERL_ARGS_ASSERT_USAGE;
2870 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2873 PerlIO_puts(out, *p++);
2876 /* convert a string of -D options (or digits) into an int.
2877 * sets *s to point to the char after the options */
2881 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2883 static const char * const usage_msgd[] = {
2884 " Debugging flag values: (see also -d)\n"
2885 " p Tokenizing and parsing (with v, displays parse stack)\n"
2886 " s Stack snapshots (with v, displays all stacks)\n"
2887 " l Context (loop) stack processing\n"
2888 " t Trace execution\n"
2889 " o Method and overloading resolution\n",
2890 " c String/numeric conversions\n"
2891 " P Print profiling info, source file input state\n"
2892 " m Memory and SV allocation\n"
2893 " f Format processing\n"
2894 " r Regular expression parsing and execution\n"
2895 " x Syntax tree dump\n",
2896 " u Tainting checks\n"
2897 " H Hash dump -- usurps values()\n"
2898 " X Scratchpad allocation\n"
2901 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2902 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2903 " v Verbose: use in conjunction with other flags\n"
2904 " C Copy On Write\n"
2905 " A Consistency checks on internal structures\n"
2906 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2907 " M trace smart match resolution\n"
2908 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2913 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2916 /* if adding extra options, remember to update DEBUG_MASK */
2917 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2919 for (; isALNUM(**s); (*s)++) {
2920 const char * const d = strchr(debopts,**s);
2922 i |= 1 << (d - debopts);
2923 else if (ckWARN_d(WARN_DEBUGGING))
2924 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2925 "invalid option -D%c, use -D'' to see choices\n", **s);
2928 else if (isDIGIT(**s)) {
2930 for (; isALNUM(**s); (*s)++) ;
2932 else if (givehelp) {
2933 const char *const *p = usage_msgd;
2934 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2937 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2938 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2939 "-Dp not implemented on this platform\n");
2945 /* This routine handles any switches that can be given during run */
2948 Perl_moreswitches(pTHX_ const char *s)
2952 const char option = *s; /* used to remember option in -m/-M code */
2954 PERL_ARGS_ASSERT_MORESWITCHES;
2962 SvREFCNT_dec(PL_rs);
2963 if (s[1] == 'x' && s[2]) {
2964 const char *e = s+=2;
2970 flags = PERL_SCAN_SILENT_ILLDIGIT;
2971 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2972 if (s + numlen < e) {
2973 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2977 PL_rs = newSVpvs("");
2978 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2979 tmps = (U8*)SvPVX(PL_rs);
2980 uvchr_to_utf8(tmps, rschar);
2981 SvCUR_set(PL_rs, UNISKIP(rschar));
2986 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2987 if (rschar & ~((U8)~0))
2988 PL_rs = &PL_sv_undef;
2989 else if (!rschar && numlen >= 2)
2990 PL_rs = newSVpvs("");
2992 char ch = (char)rschar;
2993 PL_rs = newSVpvn(&ch, 1);
2996 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3001 PL_unicode = parse_unicode_opts( (const char **)&s );
3002 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3008 while (*s && !isSPACE(*s)) ++s;
3009 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3020 forbid_setid('d', FALSE);
3023 /* -dt indicates to the debugger that threads will be used */
3024 if (*s == 't' && !isALNUM(s[1])) {
3026 my_setenv("PERL5DB_THREADED", "1");
3029 /* The following permits -d:Mod to accepts arguments following an =
3030 in the fashion that -MSome::Mod does. */
3031 if (*s == ':' || *s == '=') {
3032 const char *start = ++s;
3033 const char *const end = s + strlen(s);
3034 SV * const sv = newSVpvs("use Devel::");
3036 /* We now allow -d:Module=Foo,Bar */
3037 while(isALNUM(*s) || *s==':') ++s;
3039 sv_catpvn(sv, start, end - start);
3041 sv_catpvn(sv, start, s-start);
3042 /* Don't use NUL as q// delimiter here, this string goes in the
3044 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3047 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3051 PL_perldb = PERLDB_ALL;
3058 forbid_setid('D', FALSE);
3060 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3061 #else /* !DEBUGGING */
3062 if (ckWARN_d(WARN_DEBUGGING))
3063 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3064 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3065 for (s++; isALNUM(*s); s++) ;
3070 usage(PL_origargv[0]);
3073 Safefree(PL_inplace);
3074 #if defined(__CYGWIN__) /* do backup extension automagically */
3075 if (*(s+1) == '\0') {
3076 PL_inplace = savepvs(".bak");
3079 #endif /* __CYGWIN__ */
3081 const char * const start = ++s;
3082 while (*s && !isSPACE(*s))
3085 PL_inplace = savepvn(start, s - start);
3089 if (*s == '-') /* Additional switches on #! line. */
3093 case 'I': /* -I handled both here and in parse_body() */
3094 forbid_setid('I', FALSE);
3096 while (*s && isSPACE(*s))
3101 /* ignore trailing spaces (possibly followed by other switches) */
3103 for (e = p; *e && !isSPACE(*e); e++) ;
3107 } while (*p && *p != '-');
3109 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3115 Perl_croak(aTHX_ "No directory specified for -I");
3121 SvREFCNT_dec(PL_ors_sv);
3127 PL_ors_sv = newSVpvs("\n");
3128 numlen = 3 + (*s == '0');
3129 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3133 if (RsPARA(PL_rs)) {
3134 PL_ors_sv = newSVpvs("\n\n");
3137 PL_ors_sv = newSVsv(PL_rs);
3142 forbid_setid('M', FALSE); /* XXX ? */
3145 forbid_setid('m', FALSE); /* XXX ? */
3150 const char *use = "use ";
3152 /* -M-foo == 'no foo' */
3153 /* Leading space on " no " is deliberate, to make both
3154 possibilities the same length. */
3155 if (*s == '-') { use = " no "; ++s; }
3156 sv = newSVpvn(use,4);
3158 /* We allow -M'Module qw(Foo Bar)' */
3159 while(isALNUM(*s) || *s==':') {
3168 Perl_croak(aTHX_ "Module name required with -%c option",
3171 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3172 "contains single ':'",
3173 (int)(s - start), start, option);
3174 end = s + strlen(s);
3176 sv_catpvn(sv, start, end - start);
3177 if (option == 'm') {
3179 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3180 sv_catpvs( sv, " ()");
3183 sv_catpvn(sv, start, s-start);
3184 /* Use NUL as q''-delimiter. */
3185 sv_catpvs(sv, " split(/,/,q\0");
3187 sv_catpvn(sv, s, end - s);
3188 sv_catpvs(sv, "\0)");
3191 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3194 Perl_croak(aTHX_ "Missing argument to -%c", option);
3205 forbid_setid('s', FALSE);
3206 PL_doswitches = TRUE;
3220 PL_do_undump = TRUE;
3228 if (!sv_derived_from(PL_patchlevel, "version"))
3229 upg_version(PL_patchlevel, TRUE);
3232 SV* level= vstringify(PL_patchlevel);
3233 #ifdef PERL_PATCHNUM
3234 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3235 SV *num = newSVpvs(PERL_PATCHNUM "*");
3237 SV *num = newSVpvs(PERL_PATCHNUM);
3240 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3241 SvREFCNT_dec(level);
3244 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3248 PerlIO_printf(PerlIO_stdout(),
3249 "\nThis is perl " STRINGIFY(PERL_REVISION)
3250 ", version " STRINGIFY(PERL_VERSION)
3251 ", subversion " STRINGIFY(PERL_SUBVERSION)
3252 " (%"SVf") built for " ARCHNAME, level
3254 SvREFCNT_dec(level);
3257 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3258 PerlIO_printf(PerlIO_stdout(),
3259 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3260 SVfARG(vstringify(PL_patchlevel))));
3261 PerlIO_printf(PerlIO_stdout(),
3262 Perl_form(aTHX_ " built under %s at %s %s\n",
3263 OSNAME, __DATE__, __TIME__));
3264 PerlIO_printf(PerlIO_stdout(),
3265 Perl_form(aTHX_ " OS Specific Release: %s\n",
3268 #if defined(LOCAL_PATCH_COUNT)
3269 if (LOCAL_PATCH_COUNT > 0)
3270 PerlIO_printf(PerlIO_stdout(),
3271 "\n(with %d registered patch%s, "
3272 "see perl -V for more detail)",
3274 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3277 PerlIO_printf(PerlIO_stdout(),
3278 "\n\nCopyright 1987-2010, Larry Wall\n");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3284 PerlIO_printf(PerlIO_stdout(),
3285 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3286 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3289 PerlIO_printf(PerlIO_stdout(),
3290 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3291 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3294 PerlIO_printf(PerlIO_stdout(),
3295 "atariST series port, ++jrb bammi@cadence.com\n");
3298 PerlIO_printf(PerlIO_stdout(),
3299 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3302 PerlIO_printf(PerlIO_stdout(),
3303 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3306 PerlIO_printf(PerlIO_stdout(),
3307 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3310 PerlIO_printf(PerlIO_stdout(),
3311 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3314 PerlIO_printf(PerlIO_stdout(),
3315 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3318 PerlIO_printf(PerlIO_stdout(),
3319 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3322 PerlIO_printf(PerlIO_stdout(),
3323 "EPOC port by Olaf Flebbe, 1999-2002\n");
3326 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3327 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3330 #ifdef __SYMBIAN32__
3331 PerlIO_printf(PerlIO_stdout(),
3332 "Symbian port by Nokia, 2004-2005\n");
3334 #ifdef BINARY_BUILD_NOTICE
3335 BINARY_BUILD_NOTICE;
3337 PerlIO_printf(PerlIO_stdout(),
3339 Perl may be copied only under the terms of either the Artistic License or the\n\
3340 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3341 Complete documentation for Perl, including FAQ lists, should be found on\n\
3342 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3343 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3346 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3347 PL_dowarn |= G_WARN_ON;
3352 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3353 if (!specialWARN(PL_compiling.cop_warnings))
3354 PerlMemShared_free(PL_compiling.cop_warnings);
3355 PL_compiling.cop_warnings = pWARN_ALL ;
3359 PL_dowarn = G_WARN_ALL_OFF;
3360 if (!specialWARN(PL_compiling.cop_warnings))
3361 PerlMemShared_free(PL_compiling.cop_warnings);
3362 PL_compiling.cop_warnings = pWARN_NONE ;
3369 if (s[0] == '-') /* Additional switches on #! line. */
3374 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3380 #ifdef ALTERNATE_SHEBANG
3381 case 'S': /* OS/2 needs -S on "extproc" line. */
3385 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3390 /* compliments of Tom Christiansen */
3392 /* unexec() can be found in the Gnu emacs distribution */
3393 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3396 Perl_my_unexec(pTHX)
3398 PERL_UNUSED_CONTEXT;
3400 SV * prog = newSVpv(BIN_EXP, 0);
3401 SV * file = newSVpv(PL_origfilename, 0);
3405 sv_catpvs(prog, "/perl");
3406 sv_catpvs(file, ".perldump");
3408 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3409 /* unexec prints msg to stderr in case of failure */
3410 PerlProc_exit(status);
3413 # include <lib$routines.h>
3414 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3415 # elif defined(WIN32) || defined(__CYGWIN__)
3416 Perl_croak(aTHX_ "dump is not supported");
3418 ABORT(); /* for use with undump */
3423 /* initialize curinterp */
3429 # define PERLVAR(var,type)
3430 # define PERLVARA(var,n,type)
3431 # if defined(PERL_IMPLICIT_CONTEXT)
3432 # define PERLVARI(var,type,init) aTHX->var = init;
3433 # define PERLVARIC(var,type,init) aTHX->var = init;
3435 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3436 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3438 # include "intrpvar.h"
3444 # define PERLVAR(var,type)
3445 # define PERLVARA(var,n,type)
3446 # define PERLVARI(var,type,init) PL_##var = init;
3447 # define PERLVARIC(var,type,init) PL_##var = init;
3448 # include "intrpvar.h"
3455 /* As these are inside a structure, PERLVARI isn't capable of initialising
3457 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3458 PL_reg_poscache = PL_reg_starttry = NULL;
3462 S_init_main_stash(pTHX)
3467 PL_curstash = PL_defstash = newHV();
3468 /* We know that the string "main" will be in the global shared string
3469 table, so it's a small saving to use it rather than allocate another
3471 PL_curstname = newSVpvs_share("main");
3472 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3473 /* If we hadn't caused another reference to "main" to be in the shared
3474 string table above, then it would be worth reordering these two,
3475 because otherwise all we do is delete "main" from it as a consequence
3476 of the SvREFCNT_dec, only to add it again with hv_name_set */
3477 SvREFCNT_dec(GvHV(gv));
3478 hv_name_set(PL_defstash, "main", 4, 0);
3479 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3481 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3483 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3484 GvMULTI_on(PL_incgv);
3485 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3486 GvMULTI_on(PL_hintgv);
3487 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3488 SvREFCNT_inc_simple_void(PL_defgv);
3489 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3490 SvREFCNT_inc_simple_void(PL_errgv);
3491 GvMULTI_on(PL_errgv);
3492 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3493 GvMULTI_on(PL_replgv);
3494 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3495 #ifdef PERL_DONT_CREATE_GVSV
3498 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3500 PL_curstash = PL_defstash;
3501 CopSTASH_set(&PL_compiling, PL_defstash);
3502 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3503 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3505 /* We must init $/ before switches are processed. */
3506 sv_setpvs(get_sv("/", GV_ADD), "\n");
3510 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3511 bool *suidscript, PerlIO **rsfpp)
3516 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3519 PL_origfilename = savepvs("-e");
3522 /* if find_script() returns, it returns a malloc()-ed value */
3523 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3525 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3526 const char *s = scriptname + 8;
3532 * Tell apart "normal" usage of fdscript, e.g.
3533 * with bash on FreeBSD:
3534 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3535 * from usage in suidperl.
3536 * Does any "normal" usage leave garbage after the number???
3537 * Is it a mistake to use a similar /dev/fd/ construct for
3542 * Be supersafe and do some sanity-checks.
3543 * Still, can we be sure we got the right thing?
3546 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3549 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3551 scriptname = savepv(s + 1);
3552 Safefree(PL_origfilename);
3553 PL_origfilename = (char *)scriptname;
3558 CopFILE_free(PL_curcop);
3559 CopFILE_set(PL_curcop, PL_origfilename);
3560 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3561 scriptname = (char *)"";
3562 if (fdscript >= 0) {
3563 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3564 # if defined(HAS_FCNTL) && defined(F_SETFD)
3566 /* ensure close-on-exec */
3567 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3570 else if (!*scriptname) {
3571 forbid_setid(0, *suidscript);
3572 *rsfpp = PerlIO_stdin();
3575 #ifdef FAKE_BIT_BUCKET
3576 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3577 * is called) and still have the "-e" work. (Believe it or not,
3578 * a /dev/null is required for the "-e" to work because source
3579 * filter magic is used to implement it. ) This is *not* a general
3580 * replacement for a /dev/null. What we do here is create a temp
3581 * file (an empty file), open up that as the script, and then
3582 * immediately close and unlink it. Close enough for jazz. */
3583 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3584 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3585 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3586 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3587 FAKE_BIT_BUCKET_TEMPLATE
3589 const char * const err = "Failed to create a fake bit bucket";
3590 if (strEQ(scriptname, BIT_BUCKET)) {
3591 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3592 int tmpfd = mkstemp(tmpname);
3594 scriptname = tmpname;
3597 Perl_croak(aTHX_ err);
3600 scriptname = mktemp(tmpname);
3602 Perl_croak(aTHX_ err);
3607 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3608 #ifdef FAKE_BIT_BUCKET
3609 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3610 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3611 && strlen(scriptname) == sizeof(tmpname) - 1) {
3614 scriptname = BIT_BUCKET;
3616 # if defined(HAS_FCNTL) && defined(F_SETFD)
3618 /* ensure close-on-exec */
3619 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3623 /* PSz 16 Sep 03 Keep neat error message */
3625 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3627 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3628 CopFILE(PL_curcop), Strerror(errno));
3634 * I_SYSSTATVFS HAS_FSTATVFS
3636 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3637 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3638 * here so that metaconfig picks them up. */
3641 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3642 /* Don't even need this function. */
3645 S_validate_suid(pTHX_ PerlIO *rsfp)
3647 PERL_ARGS_ASSERT_VALIDATE_SUID;
3649 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3652 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3653 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3655 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3658 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3659 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3660 /* not set-id, must be wrapped */
3663 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3666 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3670 register const char *s2;
3672 PERL_ARGS_ASSERT_FIND_BEGINNING;
3674 /* skip forward in input to the real script? */
3676 while (PL_doextract) {
3677 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3678 Perl_croak(aTHX_ "No Perl script found in input\n");
3680 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3681 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3682 PL_doextract = FALSE;
3683 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3685 while (*s == ' ' || *s == '\t') s++;
3687 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3688 || s2[-1] == '_') s2--;
3689 if (strnEQ(s2-4,"perl",4))
3690 while ((s = moreswitches(s)))
3702 PL_uid = PerlProc_getuid();
3703 PL_euid = PerlProc_geteuid();
3704 PL_gid = PerlProc_getgid();
3705 PL_egid = PerlProc_getegid();
3707 PL_uid |= PL_gid << 16;
3708 PL_euid |= PL_egid << 16;
3710 /* Should not happen: */
3711 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3712 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3715 * Should go by suidscript, not uid!=euid: why disallow
3716 * system("ls") in scripts run from setuid things?
3717 * Or, is this run before we check arguments and set suidscript?
3718 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3719 * (We never have suidscript, can we be sure to have fdscript?)
3720 * Or must then go by UID checks? See comments in forbid_setid also.
3724 /* This is used very early in the lifetime of the program,
3725 * before even the options are parsed, so PL_tainting has
3726 * not been initialized properly. */
3728 Perl_doing_taint(int argc, char *argv[], char *envp[])
3730 #ifndef PERL_IMPLICIT_SYS
3731 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3732 * before we have an interpreter-- and the whole point of this
3733 * function is to be called at such an early stage. If you are on
3734 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3735 * "tainted because running with altered effective ids', you'll
3736 * have to add your own checks somewhere in here. The two most
3737 * known samples of 'implicitness' are Win32 and NetWare, neither
3738 * of which has much of concept of 'uids'. */
3739 int uid = PerlProc_getuid();
3740 int euid = PerlProc_geteuid();
3741 int gid = PerlProc_getgid();
3742 int egid = PerlProc_getegid();
3749 if (uid && (euid != uid || egid != gid))
3751 #endif /* !PERL_IMPLICIT_SYS */
3752 /* This is a really primitive check; environment gets ignored only
3753 * if -T are the first chars together; otherwise one gets
3754 * "Too late" message. */
3755 if ( argc > 1 && argv[1][0] == '-'
3756 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3761 /* Passing the flag as a single char rather than a string is a slight space
3762 optimisation. The only message that isn't /^-.$/ is
3763 "program input from stdin", which is substituted in place of '\0', which
3764 could never be a command line flag. */
3766 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3769 char string[3] = "-x";
3770 const char *message = "program input from stdin";
3777 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3778 if (PL_euid != PL_uid)
3779 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3780 if (PL_egid != PL_gid)
3781 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3782 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3784 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3788 Perl_init_dbargs(pTHX)
3790 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3795 /* Someone has already created it.
3796 It might have entries, and if we just turn off AvREAL(), they will
3797 "leak" until global destruction. */
3800 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3804 Perl_init_debugger(pTHX)
3807 HV * const ostash = PL_curstash;
3809 PL_curstash = PL_debstash;
3811 Perl_init_dbargs(aTHX);
3812 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3813 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3814 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3815 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3816 if (!SvIOK(PL_DBsingle))
3817 sv_setiv(PL_DBsingle, 0);
3818 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3819 if (!SvIOK(PL_DBtrace))
3820 sv_setiv(PL_DBtrace, 0);
3821 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3822 if (!SvIOK(PL_DBsignal))
3823 sv_setiv(PL_DBsignal, 0);
3824 PL_curstash = ostash;
3827 #ifndef STRESS_REALLOC
3828 #define REASONABLE(size) (size)
3830 #define REASONABLE(size) (1) /* unreasonable */
3834 Perl_init_stacks(pTHX)
3837 /* start with 128-item stack and 8K cxstack */
3838 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3839 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3840 PL_curstackinfo->si_type = PERLSI_MAIN;
3841 PL_curstack = PL_curstackinfo->si_stack;
3842 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3844 PL_stack_base = AvARRAY(PL_curstack);
3845 PL_stack_sp = PL_stack_base;
3846 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3848 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3851 PL_tmps_max = REASONABLE(128);
3853 Newx(PL_markstack,REASONABLE(32),I32);
3854 PL_markstack_ptr = PL_markstack;
3855 PL_markstack_max = PL_markstack + REASONABLE(32);
3859 Newx(PL_scopestack,REASONABLE(32),I32);
3861 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3863 PL_scopestack_ix = 0;
3864 PL_scopestack_max = REASONABLE(32);
3866 Newx(PL_savestack,REASONABLE(128),ANY);
3867 PL_savestack_ix = 0;
3868 PL_savestack_max = REASONABLE(128);
3877 while (PL_curstackinfo->si_next)
3878 PL_curstackinfo = PL_curstackinfo->si_next;
3879 while (PL_curstackinfo) {
3880 PERL_SI *p = PL_curstackinfo->si_prev;
3881 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3882 Safefree(PL_curstackinfo->si_cxstack);
3883 Safefree(PL_curstackinfo);
3884 PL_curstackinfo = p;
3886 Safefree(PL_tmps_stack);
3887 Safefree(PL_markstack);
3888 Safefree(PL_scopestack);
3890 Safefree(PL_scopestack_name);
3892 Safefree(PL_savestack);
3897 S_init_predump_symbols(pTHX)
3904 sv_setpvs(get_sv("\"", GV_ADD), " ");
3905 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3908 /* Historically, PVIOs were blessed into IO::Handle, unless
3909 FileHandle was loaded, in which case they were blessed into
3910 that. Action at a distance.
3911 However, if we simply bless into IO::Handle, we break code
3912 that assumes that PVIOs will have (among others) a seek
3913 method. IO::File inherits from IO::Handle and IO::Seekable,
3914 and provides the needed methods. But if we simply bless into
3915 it, then we break code that assumed that by loading
3916 IO::Handle, *it* would work.
3917 So a compromise is to set up the correct @IO::File::ISA,
3918 so that code that does C<use IO::Handle>; will still work.
3921 isa = get_av("IO::File::ISA", GV_ADD | GV_ADDMULTI);
3922 av_push(isa, newSVpvs("IO::Handle"));
3923 av_push(isa, newSVpvs("IO::Seekable"));
3924 av_push(isa, newSVpvs("Exporter"));
3925 (void) gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVGV);
3926 (void) gv_fetchpvs("IO::Seekable::", GV_ADD, SVt_PVGV);
3927 (void) gv_fetchpvs("Exporter::", GV_ADD, SVt_PVGV);
3930 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3931 GvMULTI_on(PL_stdingv);
3932 io = GvIOp(PL_stdingv);
3933 IoTYPE(io) = IoTYPE_RDONLY;
3934 IoIFP(io) = PerlIO_stdin();
3935 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3937 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3939 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3942 IoTYPE(io) = IoTYPE_WRONLY;
3943 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3945 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3947 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3949 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3950 GvMULTI_on(PL_stderrgv);
3951 io = GvIOp(PL_stderrgv);
3952 IoTYPE(io) = IoTYPE_WRONLY;
3953 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3954 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3956 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3958 PL_statname = newSV(0); /* last filename we did stat on */
3962 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3966 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3968 argc--,argv++; /* skip name of script */
3969 if (PL_doswitches) {
3970 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3974 if (argv[0][1] == '-' && !argv[0][2]) {
3978 if ((s = strchr(argv[0], '='))) {
3979 const char *const start_name = argv[0] + 1;
3980 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3981 TRUE, SVt_PV)), s + 1);
3984 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3987 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3988 GvMULTI_on(PL_argvgv);
3989 (void)gv_AVadd(PL_argvgv);
3990 av_clear(GvAVn(PL_argvgv));
3991 for (; argc > 0; argc--,argv++) {
3992 SV * const sv = newSVpv(argv[0],0);
3993 av_push(GvAVn(PL_argvgv),sv);
3994 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3995 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3998 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3999 (void)sv_utf8_decode(sv);
4005 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4010 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4012 PL_toptarget = newSV_type(SVt_PVFM);
4013 sv_setpvs(PL_toptarget, "");
4014 PL_bodytarget = newSV_type(SVt_PVFM);
4015 sv_setpvs(PL_bodytarget, "");
4016 PL_formtarget = PL_bodytarget;
4020 init_argv_symbols(argc,argv);
4022 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4023 sv_setpv(GvSV(tmpgv),PL_origfilename);
4025 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4027 bool env_is_not_environ;
4028 GvMULTI_on(PL_envgv);
4029 hv = GvHVn(PL_envgv);
4030 hv_magic(hv, NULL, PERL_MAGIC_env);
4032 #ifdef USE_ENVIRON_ARRAY
4033 /* Note that if the supplied env parameter is actually a copy
4034 of the global environ then it may now point to free'd memory
4035 if the environment has been modified since. To avoid this
4036 problem we treat env==NULL as meaning 'use the default'
4040 env_is_not_environ = env != environ;
4041 if (env_is_not_environ
4042 # ifdef USE_ITHREADS
4043 && PL_curinterp == aTHX
4052 for (; *env; env++) {
4055 if (!(s = strchr(old_var,'=')) || s == old_var)
4058 #if defined(MSDOS) && !defined(DJGPP)
4060 (void)strupr(old_var);
4063 sv = newSVpv(s+1, 0);
4064 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4065 if (env_is_not_environ)
4069 #endif /* USE_ENVIRON_ARRAY */
4070 #endif /* !PERL_MICRO */
4073 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4074 SvREADONLY_off(GvSV(tmpgv));
4075 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4076 SvREADONLY_on(GvSV(tmpgv));
4078 #ifdef THREADS_HAVE_PIDS
4079 PL_ppid = (IV)getppid();
4082 /* touch @F array to prevent spurious warnings 20020415 MJD */
4084 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4089 S_init_perllib(pTHX)
4093 const char *perl5lib = NULL;
4096 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4102 perl5lib = PerlEnv_getenv("PERL5LIB");
4104 * It isn't possible to delete an environment variable with
4105 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4106 * case we treat PERL5LIB as undefined if it has a zero-length value.
4108 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4109 if (perl5lib && *perl5lib != '\0')
4113 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4115 s = PerlEnv_getenv("PERLLIB");
4117 incpush_use_sep(s, 0, 0);
4120 /* Treat PERL5?LIB as a possible search list logical name -- the
4121 * "natural" VMS idiom for a Unix path string. We allow each
4122 * element to be a set of |-separated directories for compatibility.
4126 if (my_trnlnm("PERL5LIB",buf,0))
4128 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4129 } while (my_trnlnm("PERL5LIB",buf,++idx));
4131 while (my_trnlnm("PERLLIB",buf,idx++))
4132 incpush_use_sep(buf, 0, 0);
4137 #ifndef PERL_IS_MINIPERL
4138 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4139 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4141 /* Use the ~-expanded versions of APPLLIB (undocumented),
4142 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4145 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4146 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4150 /* sitearch is always relative to sitelib on Windows for
4151 * DLL-based path intuition to work correctly */
4152 # if !defined(WIN32)
4153 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4154 INCPUSH_CAN_RELOCATE);
4160 /* this picks up sitearch as well */
4161 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4163 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4165 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4169 #ifdef PERL_VENDORARCH_EXP
4170 /* vendorarch is always relative to vendorlib on Windows for
4171 * DLL-based path intuition to work correctly */
4172 # if !defined(WIN32)
4173 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4174 INCPUSH_CAN_RELOCATE);
4178 #ifdef PERL_VENDORLIB_EXP
4180 /* this picks up vendorarch as well */
4181 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4183 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4185 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4186 INCPUSH_CAN_RELOCATE);
4191 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4195 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4199 s = win32_get_privlib(PERL_FS_VERSION, &len);
4201 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4204 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4206 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4210 #ifdef PERL_OTHERLIBDIRS
4211 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4212 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4213 |INCPUSH_CAN_RELOCATE);
4219 * It isn't possible to delete an environment variable with
4220 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4221 * case we treat PERL5LIB as undefined if it has a zero-length value.
4223 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4224 if (perl5lib && *perl5lib != '\0')
4228 incpush_use_sep(perl5lib, 0,
4229 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4231 /* Treat PERL5?LIB as a possible search list logical name -- the
4232 * "natural" VMS idiom for a Unix path string. We allow each
4233 * element to be a set of |-separated directories for compatibility.
4237 if (my_trnlnm("PERL5LIB",buf,0))
4239 incpush_use_sep(buf, 0,
4240 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4241 } while (my_trnlnm("PERL5LIB",buf,++idx));
4245 /* Use the ~-expanded versions of APPLLIB (undocumented),
4246 SITELIB and VENDORLIB for older versions
4249 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4250 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4253 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4254 /* Search for version-specific dirs below here */
4255 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4256 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4260 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4261 /* Search for version-specific dirs below here */
4262 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4263 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4266 #ifdef PERL_OTHERLIBDIRS
4267 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4268 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4269 |INCPUSH_CAN_RELOCATE);
4271 #endif /* !PERL_IS_MINIPERL */
4274 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4277 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4278 # define PERLLIB_SEP ';'
4281 # define PERLLIB_SEP '|'
4283 # define PERLLIB_SEP ':'
4286 #ifndef PERLLIB_MANGLE
4287 # define PERLLIB_MANGLE(s,n) (s)
4290 /* Push a directory onto @INC if it exists.
4291 Generate a new SV if we do this, to save needing to copy the SV we push
4294 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4299 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4301 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4302 S_ISDIR(tmpstatbuf.st_mode)) {
4304 dir = newSVsv(stem);
4306 /* Truncate dir back to stem. */
4307 SvCUR_set(dir, SvCUR(stem));
4313 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4316 const U8 using_sub_dirs
4317 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4318 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4319 const U8 add_versioned_sub_dirs
4320 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4321 const U8 add_archonly_sub_dirs
4322 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4323 #ifdef PERL_INC_VERSION_LIST
4324 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4326 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4327 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4328 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4329 AV *const inc = GvAVn(PL_incgv);
4331 PERL_ARGS_ASSERT_INCPUSH;
4334 /* Could remove this vestigial extra block, if we don't mind a lot of
4335 re-indenting diff noise. */
4338 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4339 arranged to unshift #! line -I onto the front of @INC. However,
4340 -I can add version and architecture specific libraries, and they
4341 need to go first. The old code assumed that it was always
4342 pushing. Hence to make it work, need to push the architecture
4343 (etc) libraries onto a temporary array, then "unshift" that onto
4344 the front of @INC. */
4345 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4348 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4349 defined to so something (in os2/os2.c), but the code has been
4350 this way, ignoring any possible changed of length, since
4351 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4353 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4355 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4358 /* Do the if() outside the #ifdef to avoid warnings about an unused
4361 #ifdef PERL_RELOCATABLE_INC
4363 * Relocatable include entries are marked with a leading .../
4366 * 0: Remove that leading ".../"
4367 * 1: Remove trailing executable name (anything after the last '/')
4368 * from the perl path to give a perl prefix
4370 * While the @INC element starts "../" and the prefix ends with a real
4371 * directory (ie not . or ..) chop that real directory off the prefix
4372 * and the leading "../" from the @INC element. ie a logical "../"
4374 * Finally concatenate the prefix and the remainder of the @INC element
4375 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4376 * generates /usr/local/lib/perl5
4378 const char *libpath = SvPVX(libdir);
4379 STRLEN libpath_len = SvCUR(libdir);
4380 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4382 SV * const caret_X = get_sv("\030", 0);
4383 /* Going to use the SV just as a scratch buffer holding a C
4389 /* $^X is *the* source of taint if tainting is on, hence
4390 SvPOK() won't be true. */
4392 assert(SvPOKp(caret_X));
4393 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4395 /* Firstly take off the leading .../
4396 If all else fail we'll do the paths relative to the current
4398 sv_chop(libdir, libpath + 4);
4399 /* Don't use SvPV as we're intentionally bypassing taining,
4400 mortal copies that the mg_get of tainting creates, and
4401 corruption that seems to come via the save stack.
4402 I guess that the save stack isn't correctly set up yet. */
4403 libpath = SvPVX(libdir);
4404 libpath_len = SvCUR(libdir);
4406 /* This would work more efficiently with memrchr, but as it's
4407 only a GNU extension we'd need to probe for it and
4408 implement our own. Not hard, but maybe not worth it? */
4410 prefix = SvPVX(prefix_sv);
4411 lastslash = strrchr(prefix, '/');
4413 /* First time in with the *lastslash = '\0' we just wipe off
4414 the trailing /perl from (say) /usr/foo/bin/perl
4418 while ((*lastslash = '\0'), /* Do that, come what may. */
4419 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4420 && (lastslash = strrchr(prefix, '/')))) {
4421 if (lastslash[1] == '\0'
4422 || (lastslash[1] == '.'
4423 && (lastslash[2] == '/' /* ends "/." */
4424 || (lastslash[2] == '/'
4425 && lastslash[3] == '/' /* or "/.." */
4427 /* Prefix ends "/" or "/." or "/..", any of which
4428 are fishy, so don't do any more logical cleanup.
4432 /* Remove leading "../" from path */
4435 /* Next iteration round the loop removes the last
4436 directory name from prefix by writing a '\0' in
4437 the while clause. */
4439 /* prefix has been terminated with a '\0' to the correct
4440 length. libpath points somewhere into the libdir SV.
4441 We need to join the 2 with '/' and drop the result into
4443 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4444 SvREFCNT_dec(libdir);
4445 /* And this is the new libdir. */
4448 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4449 /* Need to taint reloccated paths if running set ID */
4450 SvTAINTED_on(libdir);
4453 SvREFCNT_dec(prefix_sv);
4458 * BEFORE pushing libdir onto @INC we may first push version- and
4459 * archname-specific sub-directories.
4461 if (using_sub_dirs) {
4463 #ifdef PERL_INC_VERSION_LIST
4464 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4465 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4466 const char * const *incver;
4473 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4475 while (unix[len-1] == '/') len--; /* Cosmetic */
4476 sv_usepvn(libdir,unix,len);
4479 PerlIO_printf(Perl_error_log,
4480 "Failed to unixify @INC element \"%s\"\n",
4484 subdir = newSVsv(libdir);
4486 if (add_versioned_sub_dirs) {
4487 /* .../version/archname if -d .../version/archname */
4488 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4489 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4491 /* .../version if -d .../version */
4492 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4493 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4496 #ifdef PERL_INC_VERSION_LIST
4498 for (incver = incverlist; *incver; incver++) {
4499 /* .../xxx if -d .../xxx */
4500 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4501 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4506 if (add_archonly_sub_dirs) {
4507 /* .../archname if -d .../archname */
4508 sv_catpvs(subdir, "/" ARCHNAME);
4509 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4513 assert (SvREFCNT(subdir) == 1);
4514 SvREFCNT_dec(subdir);
4517 /* finally add this lib directory at the end of @INC */
4519 U32 extra = av_len(av) + 1;
4520 av_unshift(inc, extra + push_basedir);
4522 av_store(inc, extra, libdir);
4524 /* av owns a reference, av_store() expects to be donated a
4525 reference, and av expects to be sane when it's cleared.
4526 If I wanted to be naughty and wrong, I could peek inside the
4527 implementation of av_clear(), realise that it uses
4528 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4529 and so directly steal from it (with a memcpy() to inc, and
4530 then memset() to NULL them out. But people copy code from the
4531 core expecting it to be best practise, so let's use the API.
4532 Although studious readers will note that I'm not checking any
4534 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4538 else if (push_basedir) {
4539 av_push(inc, libdir);
4542 if (!push_basedir) {
4543 assert (SvREFCNT(libdir) == 1);
4544 SvREFCNT_dec(libdir);
4550 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4554 /* This logic has been broken out from S_incpush(). It may be possible to
4557 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4564 /* Break at all separators */
4565 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4567 /* skip any consecutive separators */
4569 /* Uncomment the next line for PATH semantics */
4570 /* But you'll need to write tests */
4571 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4573 incpush(p, (STRLEN)(s - p), flags);
4578 incpush(p, (STRLEN)(end - p), flags);
4583 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4587 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4593 PERL_ARGS_ASSERT_CALL_LIST;
4595 while (av_len(paramList) >= 0) {
4596 cv = MUTABLE_CV(av_shift(paramList));
4598 if (paramList == PL_beginav) {
4599 /* save PL_beginav for compiler */
4600 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4602 else if (paramList == PL_checkav) {
4603 /* save PL_checkav for compiler */
4604 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4606 else if (paramList == PL_unitcheckav) {
4607 /* save PL_unitcheckav for compiler */
4608 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4619 PL_madskills |= 16384;
4624 PL_madskills &= ~16384;
4627 (void)SvPV_const(atsv, len);
4629 PL_curcop = &PL_compiling;
4630 CopLINE_set(PL_curcop, oldline);
4631 if (paramList == PL_beginav)
4632 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4634 Perl_sv_catpvf(aTHX_ atsv,
4635 "%s failed--call queue aborted",
4636 paramList == PL_checkav ? "CHECK"
4637 : paramList == PL_initav ? "INIT"
4638 : paramList == PL_unitcheckav ? "UNITCHECK"
4640 while (PL_scopestack_ix > oldscope)
4643 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4650 /* my_exit() was called */
4651 while (PL_scopestack_ix > oldscope)
4654 PL_curstash = PL_defstash;
4655 PL_curcop = &PL_compiling;
4656 CopLINE_set(PL_curcop, oldline);
4662 PL_curcop = &PL_compiling;
4663 CopLINE_set(PL_curcop, oldline);
4666 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4675 Perl_my_exit(pTHX_ U32 status)
4686 STATUS_EXIT_SET(status);
4693 Perl_my_failure_exit(pTHX)
4697 /* We have been called to fall on our sword. The desired exit code
4698 * should be already set in STATUS_UNIX, but could be shifted over
4699 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4702 * If an error code has not been set, then force the issue.
4704 if (MY_POSIX_EXIT) {
4706 /* According to the die_exit.t tests, if errno is non-zero */
4707 /* It should be used for the error status. */
4709 if (errno == EVMSERR) {
4710 STATUS_NATIVE = vaxc$errno;
4713 /* According to die_exit.t tests, if the child_exit code is */
4714 /* also zero, then we need to exit with a code of 255 */
4715 if ((errno != 0) && (errno < 256))
4716 STATUS_UNIX_EXIT_SET(errno);
4717 else if (STATUS_UNIX < 255) {
4718 STATUS_UNIX_EXIT_SET(255);
4723 /* The exit code could have been set by $? or vmsish which
4724 * means that it may not have fatal set. So convert
4725 * success/warning codes to fatal with out changing
4726 * the POSIX status code. The severity makes VMS native
4727 * status handling work, while UNIX mode programs use the
4728 * the POSIX exit codes.
4730 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4731 STATUS_NATIVE &= STS$M_COND_ID;
4732 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4736 /* Traditionally Perl on VMS always expects a Fatal Error. */
4737 if (vaxc$errno & 1) {
4739 /* So force success status to failure */
4740 if (STATUS_NATIVE & 1)
4745 STATUS_UNIX = EINTR; /* In case something cares */
4750 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4752 /* Encode the severity code */
4753 severity = STATUS_NATIVE & STS$M_SEVERITY;
4754 STATUS_UNIX = (severity ? severity : 1) << 8;
4756 /* Perl expects this to be a fatal error */
4757 if (severity != STS$K_SEVERE)
4766 STATUS_UNIX_SET(errno);
4768 exitstatus = STATUS_UNIX >> 8;
4769 if (exitstatus & 255)
4770 STATUS_UNIX_SET(exitstatus);
4772 STATUS_UNIX_SET(255);
4779 S_my_exit_jump(pTHX)
4784 SvREFCNT_dec(PL_e_script);
4788 POPSTACK_TO(PL_mainstack);
4796 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4799 const char * const p = SvPVX_const(PL_e_script);
4800 const char *nl = strchr(p, '\n');
4802 PERL_UNUSED_ARG(idx);
4803 PERL_UNUSED_ARG(maxlen);
4805 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4807 filter_del(read_e_script);
4810 sv_catpvn(buf_sv, p, nl-p);
4811 sv_chop(PL_e_script, nl);
4817 * c-indentation-style: bsd
4819 * indent-tabs-mode: t
4822 * ex: set ts=8 sts=4 sw=4 noet: