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 SvREFCNT_dec(PL_main_cv);
758 /* Tell PerlIO we are about to tear things apart in case
759 we have layers which are using resources that should
763 PerlIO_destruct(aTHX);
765 if (PL_sv_objcount) {
767 * Try to destruct global references. We do this first so that the
768 * destructors and destructees still exist. Some sv's might remain.
769 * Non-referenced objects are on their own.
773 if (PL_defoutgv && !SvREFCNT(PL_defoutgv))
774 PL_defoutgv = NULL; /* may have been freed */
777 /* unhook hooks which will soon be, or use, destroyed data */
778 SvREFCNT_dec(PL_warnhook);
780 SvREFCNT_dec(PL_diehook);
783 /* call exit list functions */
784 while (PL_exitlistlen-- > 0)
785 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
787 Safefree(PL_exitlist);
792 SvREFCNT_dec(PL_registered_mros);
794 /* jettison our possibly duplicated environment */
795 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
796 * so we certainly shouldn't free it here
799 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
800 if (environ != PL_origenviron && !PL_use_safe_putenv
802 /* only main thread can free environ[0] contents */
803 && PL_curinterp == aTHX
809 for (i = 0; environ[i]; i++)
810 safesysfree(environ[i]);
812 /* Must use safesysfree() when working with environ. */
813 safesysfree(environ);
815 environ = PL_origenviron;
818 #endif /* !PERL_MICRO */
820 if (destruct_level == 0) {
822 DEBUG_P(debprofdump());
824 #if defined(PERLIO_LAYERS)
825 /* No more IO - including error messages ! */
826 PerlIO_cleanup(aTHX);
829 CopFILE_free(&PL_compiling);
830 CopSTASH_free(&PL_compiling);
832 /* The exit() function will do everything that needs doing. */
836 /* reset so print() ends up where we expect */
840 /* the syntax tree is shared between clones
841 * so op_free(PL_main_root) only ReREFCNT_dec's
842 * REGEXPs in the parent interpreter
843 * we need to manually ReREFCNT_dec for the clones
845 SvREFCNT_dec(PL_regex_padav);
846 PL_regex_padav = NULL;
850 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
851 PL_stashcache = NULL;
853 /* loosen bonds of global variables */
855 /* XXX can PL_parser still be non-null here? */
856 if(PL_parser && PL_parser->rsfp) {
857 (void)PerlIO_close(PL_parser->rsfp);
858 PL_parser->rsfp = NULL;
862 Safefree(PL_splitstr);
872 PL_doswitches = FALSE;
873 PL_dowarn = G_WARN_OFF;
874 PL_doextract = FALSE;
875 PL_sawampersand = FALSE; /* must save all match strings */
878 Safefree(PL_inplace);
880 SvREFCNT_dec(PL_patchlevel);
881 SvREFCNT_dec(PL_apiversion);
884 SvREFCNT_dec(PL_e_script);
890 /* magical thingies */
892 SvREFCNT_dec(PL_ofsgv); /* *, */
895 SvREFCNT_dec(PL_ors_sv); /* $\ */
898 SvREFCNT_dec(PL_rs); /* $/ */
901 Safefree(PL_osname); /* $^O */
904 SvREFCNT_dec(PL_statname);
908 /* defgv, aka *_ should be taken care of elsewhere */
910 /* clean up after study() */
911 SvREFCNT_dec(PL_lastscream);
912 PL_lastscream = NULL;
913 Safefree(PL_screamfirst);
915 Safefree(PL_screamnext);
919 Safefree(PL_efloatbuf);
923 /* startup and shutdown function lists */
924 SvREFCNT_dec(PL_beginav);
925 SvREFCNT_dec(PL_beginav_save);
926 SvREFCNT_dec(PL_endav);
927 SvREFCNT_dec(PL_checkav);
928 SvREFCNT_dec(PL_checkav_save);
929 SvREFCNT_dec(PL_unitcheckav);
930 SvREFCNT_dec(PL_unitcheckav_save);
931 SvREFCNT_dec(PL_initav);
933 PL_beginav_save = NULL;
936 PL_checkav_save = NULL;
937 PL_unitcheckav = NULL;
938 PL_unitcheckav_save = NULL;
941 /* shortcuts just get cleared */
950 PL_last_in_gv = NULL;
962 SvREFCNT_dec(PL_argvout_stack);
963 PL_argvout_stack = NULL;
965 SvREFCNT_dec(PL_modglobal);
967 SvREFCNT_dec(PL_preambleav);
968 PL_preambleav = NULL;
969 SvREFCNT_dec(PL_subname);
971 #ifdef PERL_USES_PL_PIDSTATUS
972 SvREFCNT_dec(PL_pidstatus);
975 SvREFCNT_dec(PL_toptarget);
977 SvREFCNT_dec(PL_bodytarget);
978 PL_bodytarget = NULL;
979 PL_formtarget = NULL;
981 /* free locale stuff */
982 #ifdef USE_LOCALE_COLLATE
983 Safefree(PL_collation_name);
984 PL_collation_name = NULL;
987 #ifdef USE_LOCALE_NUMERIC
988 Safefree(PL_numeric_name);
989 PL_numeric_name = NULL;
990 SvREFCNT_dec(PL_numeric_radix_sv);
991 PL_numeric_radix_sv = NULL;
994 /* clear utf8 character classes */
995 SvREFCNT_dec(PL_utf8_alnum);
996 SvREFCNT_dec(PL_utf8_ascii);
997 SvREFCNT_dec(PL_utf8_alpha);
998 SvREFCNT_dec(PL_utf8_space);
999 SvREFCNT_dec(PL_utf8_cntrl);
1000 SvREFCNT_dec(PL_utf8_graph);
1001 SvREFCNT_dec(PL_utf8_digit);
1002 SvREFCNT_dec(PL_utf8_upper);
1003 SvREFCNT_dec(PL_utf8_lower);
1004 SvREFCNT_dec(PL_utf8_print);
1005 SvREFCNT_dec(PL_utf8_punct);
1006 SvREFCNT_dec(PL_utf8_xdigit);
1007 SvREFCNT_dec(PL_utf8_mark);
1008 SvREFCNT_dec(PL_utf8_toupper);
1009 SvREFCNT_dec(PL_utf8_totitle);
1010 SvREFCNT_dec(PL_utf8_tolower);
1011 SvREFCNT_dec(PL_utf8_tofold);
1012 SvREFCNT_dec(PL_utf8_idstart);
1013 SvREFCNT_dec(PL_utf8_idcont);
1014 PL_utf8_alnum = NULL;
1015 PL_utf8_ascii = NULL;
1016 PL_utf8_alpha = NULL;
1017 PL_utf8_space = NULL;
1018 PL_utf8_cntrl = NULL;
1019 PL_utf8_graph = NULL;
1020 PL_utf8_digit = NULL;
1021 PL_utf8_upper = NULL;
1022 PL_utf8_lower = NULL;
1023 PL_utf8_print = NULL;
1024 PL_utf8_punct = NULL;
1025 PL_utf8_xdigit = NULL;
1026 PL_utf8_mark = NULL;
1027 PL_utf8_toupper = NULL;
1028 PL_utf8_totitle = NULL;
1029 PL_utf8_tolower = NULL;
1030 PL_utf8_tofold = NULL;
1031 PL_utf8_idstart = NULL;
1032 PL_utf8_idcont = NULL;
1034 if (!specialWARN(PL_compiling.cop_warnings))
1035 PerlMemShared_free(PL_compiling.cop_warnings);
1036 PL_compiling.cop_warnings = NULL;
1037 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
1038 PL_compiling.cop_hints_hash = NULL;
1039 CopFILE_free(&PL_compiling);
1040 CopSTASH_free(&PL_compiling);
1042 /* Prepare to destruct main symbol table. */
1047 SvREFCNT_dec(PL_curstname);
1048 PL_curstname = NULL;
1050 /* clear queued errors */
1051 SvREFCNT_dec(PL_errors);
1054 SvREFCNT_dec(PL_isarev);
1057 if (destruct_level >= 2) {
1058 if (PL_scopestack_ix != 0)
1059 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1060 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1061 (long)PL_scopestack_ix);
1062 if (PL_savestack_ix != 0)
1063 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1064 "Unbalanced saves: %ld more saves than restores\n",
1065 (long)PL_savestack_ix);
1066 if (PL_tmps_floor != -1)
1067 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1068 (long)PL_tmps_floor + 1);
1069 if (cxstack_ix != -1)
1070 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1071 (long)cxstack_ix + 1);
1074 /* the entries in this list are allocated via SV PVX's, so get freed
1075 * in sv_clean_all */
1076 Safefree(PL_my_cxt_list);
1078 /* Now absolutely destruct everything, somehow or other, loops or no. */
1080 /* the 2 is for PL_fdpid and PL_strtab */
1081 while (sv_clean_all() > 2)
1084 AvREAL_off(PL_fdpid); /* no surviving entries */
1085 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1088 #ifdef HAVE_INTERP_INTERN
1092 /* Destruct the global string table. */
1094 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1095 * so that sv_free() won't fail on them.
1096 * Now that the global string table is using a single hunk of memory
1097 * for both HE and HEK, we either need to explicitly unshare it the
1098 * correct way, or actually free things here.
1101 const I32 max = HvMAX(PL_strtab);
1102 HE * const * const array = HvARRAY(PL_strtab);
1103 HE *hent = array[0];
1106 if (hent && ckWARN_d(WARN_INTERNAL)) {
1107 HE * const next = HeNEXT(hent);
1108 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1109 "Unbalanced string table refcount: (%ld) for \"%s\"",
1110 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1117 hent = array[riter];
1122 HvARRAY(PL_strtab) = 0;
1123 HvTOTALKEYS(PL_strtab) = 0;
1125 SvREFCNT_dec(PL_strtab);
1128 /* free the pointer tables used for cloning */
1129 ptr_table_free(PL_ptr_table);
1130 PL_ptr_table = (PTR_TBL_t*)NULL;
1133 /* free special SVs */
1135 SvREFCNT(&PL_sv_yes) = 0;
1136 sv_clear(&PL_sv_yes);
1137 SvANY(&PL_sv_yes) = NULL;
1138 SvFLAGS(&PL_sv_yes) = 0;
1140 SvREFCNT(&PL_sv_no) = 0;
1141 sv_clear(&PL_sv_no);
1142 SvANY(&PL_sv_no) = NULL;
1143 SvFLAGS(&PL_sv_no) = 0;
1147 for (i=0; i<=2; i++) {
1148 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1149 sv_clear(PERL_DEBUG_PAD(i));
1150 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1151 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1155 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1156 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1158 #ifdef DEBUG_LEAKING_SCALARS
1159 if (PL_sv_count != 0) {
1164 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1165 svend = &sva[SvREFCNT(sva)];
1166 for (sv = sva + 1; sv < svend; ++sv) {
1167 if (SvTYPE(sv) != SVTYPEMASK) {
1168 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1170 " refcnt=%"UVuf pTHX__FORMAT "\n"
1171 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1173 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1175 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1177 sv->sv_debug_inpad ? "for" : "by",
1178 sv->sv_debug_optype ?
1179 PL_op_name[sv->sv_debug_optype]: "(none)",
1180 PTR2UV(sv->sv_debug_parent),
1183 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1184 Perl_dump_sv_child(aTHX_ sv);
1190 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1194 /* Wait for up to 4 seconds for child to terminate.
1195 This seems to be the least effort way of timing out on reaping
1197 struct timeval waitfor = {4, 0};
1198 int sock = PL_dumper_fd;
1202 FD_SET(sock, &rset);
1203 select(sock + 1, &rset, NULL, NULL, &waitfor);
1204 waitpid(child, &status, WNOHANG);
1209 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1215 #ifdef PERL_DEBUG_READONLY_OPS
1221 #if defined(PERLIO_LAYERS)
1222 /* No more IO - including error messages ! */
1223 PerlIO_cleanup(aTHX);
1226 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1227 as currently layers use it rather than NULL as a marker
1228 for no arg - and will try and SvREFCNT_dec it.
1230 SvREFCNT(&PL_sv_undef) = 0;
1231 SvREADONLY_off(&PL_sv_undef);
1233 Safefree(PL_origfilename);
1234 PL_origfilename = NULL;
1235 Safefree(PL_reg_start_tmp);
1236 PL_reg_start_tmp = (char**)NULL;
1237 PL_reg_start_tmpl = 0;
1238 Safefree(PL_reg_curpm);
1239 Safefree(PL_reg_poscache);
1240 free_tied_hv_pool();
1241 Safefree(PL_op_mask);
1242 Safefree(PL_psig_name);
1243 PL_psig_name = (SV**)NULL;
1244 PL_psig_ptr = (SV**)NULL;
1245 Safefree(PL_psig_pend);
1246 PL_psig_pend = (int*)NULL;
1248 /* We need to NULL PL_psig_pend first, so that
1249 signal handlers know not to use it */
1250 int *psig_save = PL_psig_pend;
1251 PL_psig_pend = (int*)NULL;
1252 Safefree(psig_save);
1256 PL_tainting = FALSE;
1257 PL_taint_warn = FALSE;
1258 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1261 DEBUG_P(debprofdump());
1263 #ifdef USE_REENTRANT_API
1264 Perl_reentrant_free(aTHX);
1269 while (PL_regmatch_slab) {
1270 regmatch_slab *s = PL_regmatch_slab;
1271 PL_regmatch_slab = PL_regmatch_slab->next;
1275 /* As the absolutely last thing, free the non-arena SV for mess() */
1278 /* we know that type == SVt_PVMG */
1280 /* it could have accumulated taint magic */
1283 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1284 moremagic = mg->mg_moremagic;
1285 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1287 Safefree(mg->mg_ptr);
1291 /* we know that type >= SVt_PV */
1292 SvPV_free(PL_mess_sv);
1293 Safefree(SvANY(PL_mess_sv));
1294 Safefree(PL_mess_sv);
1301 =for apidoc perl_free
1303 Releases a Perl interpreter. See L<perlembed>.
1313 PERL_ARGS_ASSERT_PERL_FREE;
1315 if (PL_veto_cleanup)
1318 #ifdef PERL_TRACK_MEMPOOL
1321 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1322 * value as we're probably hunting memory leaks then
1324 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1325 if (!s || atoi(s) == 0) {
1326 const U32 old_debug = PL_debug;
1327 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1328 thread at thread exit. */
1330 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1331 "free this thread's memory\n");
1332 PL_debug &= ~ DEBUG_m_FLAG;
1334 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1335 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1336 PL_debug = old_debug;
1341 #if defined(WIN32) || defined(NETWARE)
1342 # if defined(PERL_IMPLICIT_SYS)
1345 void *host = nw_internal_host;
1347 void *host = w32_internal_host;
1349 PerlMem_free(aTHXx);
1351 nw_delete_internal_host(host);
1353 win32_delete_internal_host(host);
1357 PerlMem_free(aTHXx);
1360 PerlMem_free(aTHXx);
1364 #if defined(USE_ITHREADS)
1365 /* provide destructors to clean up the thread key when libperl is unloaded */
1366 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1368 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1369 #pragma fini "perl_fini"
1370 #elif defined(__sun) && !defined(__GNUC__)
1371 #pragma fini (perl_fini)
1375 #if defined(__GNUC__)
1376 __attribute__((destructor))
1381 if (PL_curinterp && !PL_veto_cleanup)
1386 #endif /* THREADS */
1389 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1392 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1393 PL_exitlist[PL_exitlistlen].fn = fn;
1394 PL_exitlist[PL_exitlistlen].ptr = ptr;
1398 #ifdef HAS_PROCSELFEXE
1399 /* This is a function so that we don't hold on to MAXPATHLEN
1400 bytes of stack longer than necessary
1403 S_procself_val(pTHX_ SV *sv, const char *arg0)
1405 char buf[MAXPATHLEN];
1406 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1408 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1409 includes a spurious NUL which will cause $^X to fail in system
1410 or backticks (this will prevent extensions from being built and
1411 many tests from working). readlink is not meant to add a NUL.
1412 Normal readlink works fine.
1414 if (len > 0 && buf[len-1] == '\0') {
1418 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1419 returning the text "unknown" from the readlink rather than the path
1420 to the executable (or returning an error from the readlink). Any valid
1421 path has a '/' in it somewhere, so use that to validate the result.
1422 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1424 if (len > 0 && memchr(buf, '/', len)) {
1425 sv_setpvn(sv,buf,len);
1431 #endif /* HAS_PROCSELFEXE */
1434 S_set_caret_X(pTHX) {
1436 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1438 #ifdef HAS_PROCSELFEXE
1439 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1442 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1444 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1451 =for apidoc perl_parse
1453 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1459 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1466 PERL_ARGS_ASSERT_PERL_PARSE;
1467 #ifndef MULTIPLICITY
1468 PERL_UNUSED_ARG(my_perl);
1471 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1472 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1473 * This MUST be done before any hash stores or fetches take place.
1474 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1475 * yourself, it is your responsibility to provide a good random seed!
1476 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1477 if (!PL_rehash_seed_set)
1478 PL_rehash_seed = get_hash_seed();
1480 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1482 if (s && (atoi(s) == 1))
1483 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1485 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1490 if (PL_origalen != 0) {
1491 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1494 /* Set PL_origalen be the sum of the contiguous argv[]
1495 * elements plus the size of the env in case that it is
1496 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1497 * as the maximum modifiable length of $0. In the worst case
1498 * the area we are able to modify is limited to the size of
1499 * the original argv[0]. (See below for 'contiguous', though.)
1501 const char *s = NULL;
1504 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1505 /* Do the mask check only if the args seem like aligned. */
1507 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1509 /* See if all the arguments are contiguous in memory. Note
1510 * that 'contiguous' is a loose term because some platforms
1511 * align the argv[] and the envp[]. If the arguments look
1512 * like non-aligned, assume that they are 'strictly' or
1513 * 'traditionally' contiguous. If the arguments look like
1514 * aligned, we just check that they are within aligned
1515 * PTRSIZE bytes. As long as no system has something bizarre
1516 * like the argv[] interleaved with some other data, we are
1517 * fine. (Did I just evoke Murphy's Law?) --jhi */
1518 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1520 for (i = 1; i < PL_origargc; i++) {
1521 if ((PL_origargv[i] == s + 1
1523 || PL_origargv[i] == s + 2
1528 (PL_origargv[i] > s &&
1530 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1541 #ifndef PERL_USE_SAFE_PUTENV
1542 /* Can we grab env area too to be used as the area for $0? */
1543 if (s && PL_origenviron && !PL_use_safe_putenv) {
1544 if ((PL_origenviron[0] == s + 1)
1547 (PL_origenviron[0] > s &&
1548 PL_origenviron[0] <=
1549 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1552 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1553 s = PL_origenviron[0];
1556 my_setenv("NoNe SuCh", NULL);
1557 /* Force copy of environment. */
1558 for (i = 1; PL_origenviron[i]; i++) {
1559 if (PL_origenviron[i] == s + 1
1562 (PL_origenviron[i] > s &&
1563 PL_origenviron[i] <=
1564 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1567 s = PL_origenviron[i];
1575 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1577 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1582 /* Come here if running an undumped a.out. */
1584 PL_origfilename = savepv(argv[0]);
1585 PL_do_undump = FALSE;
1586 cxstack_ix = -1; /* start label stack again */
1588 assert (!PL_tainted);
1590 S_set_caret_X(aTHX);
1592 init_postdump_symbols(argc,argv,env);
1597 op_free(PL_main_root);
1598 PL_main_root = NULL;
1600 PL_main_start = NULL;
1601 SvREFCNT_dec(PL_main_cv);
1605 oldscope = PL_scopestack_ix;
1606 PL_dowarn = G_WARN_OFF;
1611 parse_body(env,xsinit);
1613 call_list(oldscope, PL_unitcheckav);
1615 call_list(oldscope, PL_checkav);
1622 /* my_exit() was called */
1623 while (PL_scopestack_ix > oldscope)
1626 PL_curstash = PL_defstash;
1628 call_list(oldscope, PL_unitcheckav);
1630 call_list(oldscope, PL_checkav);
1634 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1642 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1643 miniperl, and we need to see those flags reflected in the values here. */
1645 /* What this returns is subject to change. Use the public interface in Config.
1648 S_Internals_V(pTHX_ CV *cv)
1651 #ifdef LOCAL_PATCH_COUNT
1652 const int local_patch_count = LOCAL_PATCH_COUNT;
1654 const int local_patch_count = 0;
1656 const int entries = 3 + local_patch_count;
1658 static char non_bincompat_options[] =
1665 # ifdef PERL_DISABLE_PMC
1668 # ifdef PERL_DONT_CREATE_GVSV
1669 " PERL_DONT_CREATE_GVSV"
1671 # ifdef PERL_EXTERNAL_GLOB
1672 " PERL_EXTERNAL_GLOB"
1674 # ifdef PERL_IS_MINIPERL
1677 # ifdef PERL_MALLOC_WRAP
1680 # ifdef PERL_MEM_LOG
1683 # ifdef PERL_MEM_LOG_NOIMPL
1684 " PERL_MEM_LOG_NOIMPL"
1686 # ifdef PERL_USE_DEVEL
1689 # ifdef PERL_USE_SAFE_PUTENV
1690 " PERL_USE_SAFE_PUTENV"
1692 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1693 " USE_ATTRIBUTES_FOR_PERLIO"
1695 # ifdef USE_FAST_STDIO
1698 # ifdef USE_PERL_ATOF
1701 # ifdef USE_SITECUSTOMIZE
1702 " USE_SITECUSTOMIZE"
1705 PERL_UNUSED_ARG(cv);
1706 PERL_UNUSED_ARG(items);
1708 EXTEND(SP, entries);
1710 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1711 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1712 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1716 PUSHs(Perl_newSVpvn_flags(aTHX_
1717 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1720 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1724 PUSHs(&PL_sv_undef);
1727 for (i = 1; i <= local_patch_count; i++) {
1728 /* This will be an undef, if PL_localpatches[i] is NULL. */
1729 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1735 #define INCPUSH_UNSHIFT 0x01
1736 #define INCPUSH_ADD_OLD_VERS 0x02
1737 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1738 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1739 #define INCPUSH_NOT_BASEDIR 0x10
1740 #define INCPUSH_CAN_RELOCATE 0x20
1741 #define INCPUSH_ADD_SUB_DIRS \
1742 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1745 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1749 int argc = PL_origargc;
1750 char **argv = PL_origargv;
1751 const char *scriptname = NULL;
1752 VOL bool dosearch = FALSE;
1754 const char *cddir = NULL;
1755 #ifdef USE_SITECUSTOMIZE
1756 bool minus_f = FALSE;
1758 SV *linestr_sv = newSV_type(SVt_PVIV);
1759 bool add_read_e_script = FALSE;
1761 SvGROW(linestr_sv, 80);
1762 sv_setpvs(linestr_sv,"");
1768 for (argc--,argv++; argc > 0; argc--,argv++) {
1769 if (argv[0][0] != '-' || !argv[0][1])
1775 #ifndef PERL_STRICT_CR
1799 if ((s = moreswitches(s)))
1804 CHECK_MALLOC_TOO_LATE_FOR('t');
1805 if( !PL_tainting ) {
1806 PL_taint_warn = TRUE;
1812 CHECK_MALLOC_TOO_LATE_FOR('T');
1814 PL_taint_warn = FALSE;
1822 forbid_setid('e', FALSE);
1824 PL_e_script = newSVpvs("");
1825 add_read_e_script = TRUE;
1828 sv_catpv(PL_e_script, s);
1830 sv_catpv(PL_e_script, argv[1]);
1834 Perl_croak(aTHX_ "No code specified for -%c", c);
1835 sv_catpvs(PL_e_script, "\n");
1839 #ifdef USE_SITECUSTOMIZE
1845 case 'I': /* -I handled both here and in moreswitches() */
1846 forbid_setid('I', FALSE);
1847 if (!*++s && (s=argv[1]) != NULL) {
1851 STRLEN len = strlen(s);
1852 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1855 Perl_croak(aTHX_ "No directory specified for -I");
1858 forbid_setid('S', FALSE);
1867 opts_prog = newSVpvs("use Config; Config::_V()");
1871 opts_prog = Perl_newSVpvf(aTHX_
1872 "use Config; Config::config_vars(qw%c%s%c)",
1876 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1877 /* don't look for script or read stdin */
1878 scriptname = BIT_BUCKET;
1882 PL_doextract = TRUE;
1890 if (!*++s || isSPACE(*s)) {
1894 /* catch use of gnu style long options */
1895 if (strEQ(s, "version")) {
1899 if (strEQ(s, "help")) {
1906 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1917 #ifndef SECURE_INTERNAL_GETENV
1920 (s = PerlEnv_getenv("PERL5OPT")))
1924 if (*s == '-' && *(s+1) == 'T') {
1925 CHECK_MALLOC_TOO_LATE_FOR('T');
1927 PL_taint_warn = FALSE;
1930 char *popt_copy = NULL;
1943 if (!strchr("CDIMUdmtwW", *s))
1944 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1948 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1949 s = popt_copy + (s - d);
1957 if( !PL_tainting ) {
1958 PL_taint_warn = TRUE;
1969 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1971 /* SITELIB_EXP is a function call on Win32.
1972 The games with local $! are to avoid setting errno if there is no
1973 sitecustomize script. */
1974 const char *const sitelib = SITELIB_EXP;
1975 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1977 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1982 scriptname = argv[0];
1985 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1987 else if (scriptname == NULL) {
1989 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1995 /* Set $^X early so that it can be used for relocatable paths in @INC */
1996 assert (!PL_tainted);
1998 S_set_caret_X(aTHX);
2003 bool suidscript = FALSE;
2005 open_script(scriptname, dosearch, &suidscript, &rsfp);
2007 validate_suid(validarg, scriptname, fdscript, suidscript,
2011 # if defined(SIGCHLD) || defined(SIGCLD)
2014 # define SIGCHLD SIGCLD
2016 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2017 if (sigstate == (Sighandler_t) SIG_IGN) {
2018 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2019 "Can't ignore signal CHLD, forcing to default");
2020 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2028 /* This will croak if suidscript is true, as -x cannot be used with
2030 forbid_setid('x', suidscript);
2031 /* Hence you can't get here if suidscript is true */
2033 find_beginning(linestr_sv, rsfp);
2034 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2035 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2039 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2040 CvUNIQUE_on(PL_compcv);
2042 CvPADLIST(PL_compcv) = pad_new(0);
2044 PL_isarev = newHV();
2047 boot_core_UNIVERSAL();
2049 newXS("Internals::V", S_Internals_V, __FILE__);
2052 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2054 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2060 # ifdef HAS_SOCKS5_INIT
2061 socks5_init(argv[0]);
2067 init_predump_symbols();
2068 /* init_postdump_symbols not currently designed to be called */
2069 /* more than once (ENV isn't cleared first, for example) */
2070 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2072 init_postdump_symbols(argc,argv,env);
2074 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2075 * or explicitly in some platforms.
2076 * locale.c:Perl_init_i18nl10n() if the environment
2077 * look like the user wants to use UTF-8. */
2078 #if defined(__SYMBIAN32__)
2079 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2081 # ifndef PERL_IS_MINIPERL
2083 /* Requires init_predump_symbols(). */
2084 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2089 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2090 * and the default open disciplines. */
2091 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2092 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2094 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2095 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2096 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2098 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2099 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2100 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2102 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2103 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2104 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2106 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2107 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2110 sv_setpvs(sv, ":utf8\0:utf8");
2112 sv_setpvs(sv, ":utf8\0");
2115 sv_setpvs(sv, "\0:utf8");
2124 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2125 if (strEQ(s, "unsafe"))
2126 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2127 else if (strEQ(s, "safe"))
2128 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2130 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2137 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2141 PL_xmlfp = PerlIO_stdout();
2143 PL_xmlfp = PerlIO_open(s, "w");
2145 Perl_croak(aTHX_ "Can't open %s", s);
2147 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2153 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2154 PL_madskills = atoi(s);
2155 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2160 lex_start(linestr_sv, rsfp, TRUE);
2161 PL_subname = newSVpvs("main");
2163 if (add_read_e_script)
2164 filter_add(read_e_script, NULL);
2166 /* now parse the script */
2168 SETERRNO(0,SS_NORMAL);
2169 if (yyparse() || PL_parser->error_count) {
2171 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2173 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2177 CopLINE_set(PL_curcop, 0);
2178 PL_curstash = PL_defstash;
2180 SvREFCNT_dec(PL_e_script);
2188 SAVECOPFILE(PL_curcop);
2189 SAVECOPLINE(PL_curcop);
2190 gv_check(PL_defstash);
2199 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2200 dump_mstats("after compilation:");
2205 PL_restartjmpenv = NULL;
2211 =for apidoc perl_run
2213 Tells a Perl interpreter to run. See L<perlembed>.
2226 PERL_ARGS_ASSERT_PERL_RUN;
2227 #ifndef MULTIPLICITY
2228 PERL_UNUSED_ARG(my_perl);
2231 oldscope = PL_scopestack_ix;
2239 cxstack_ix = -1; /* start context stack again */
2241 case 0: /* normal completion */
2245 case 2: /* my_exit() */
2246 while (PL_scopestack_ix > oldscope)
2249 PL_curstash = PL_defstash;
2250 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2251 PL_endav && !PL_minus_c)
2252 call_list(oldscope, PL_endav);
2254 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2255 dump_mstats("after execution: ");
2261 POPSTACK_TO(PL_mainstack);
2264 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2275 S_run_body(pTHX_ I32 oldscope)
2278 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2279 PL_sawampersand ? "Enabling" : "Omitting"));
2281 if (!PL_restartop) {
2285 exit(0); /* less likely to core dump than my_exit(0) */
2289 if (DEBUG_x_TEST || DEBUG_B_TEST)
2290 dump_all_perl(!DEBUG_B_TEST);
2292 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2296 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2299 if (PERLDB_SINGLE && PL_DBsingle)
2300 sv_setiv(PL_DBsingle, 1);
2302 call_list(oldscope, PL_initav);
2303 #ifdef PERL_DEBUG_READONLY_OPS
2304 Perl_pending_Slabs_to_ro(aTHX);
2311 PL_restartjmpenv = NULL;
2312 PL_op = PL_restartop;
2316 else if (PL_main_start) {
2317 CvDEPTH(PL_main_cv) = 1;
2318 PL_op = PL_main_start;
2326 =head1 SV Manipulation Functions
2328 =for apidoc p||get_sv
2330 Returns the SV of the specified Perl scalar. C<flags> are passed to
2331 C<gv_fetchpv>. If C<GV_ADD> is set and the
2332 Perl variable does not exist then it will be created. If C<flags> is zero
2333 and the variable does not exist then NULL is returned.
2339 Perl_get_sv(pTHX_ const char *name, I32 flags)
2343 PERL_ARGS_ASSERT_GET_SV;
2345 gv = gv_fetchpv(name, flags, SVt_PV);
2352 =head1 Array Manipulation Functions
2354 =for apidoc p||get_av
2356 Returns the AV of the specified Perl array. C<flags> are passed to
2357 C<gv_fetchpv>. If C<GV_ADD> is set and the
2358 Perl variable does not exist then it will be created. If C<flags> is zero
2359 and the variable does not exist then NULL is returned.
2365 Perl_get_av(pTHX_ const char *name, I32 flags)
2367 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2369 PERL_ARGS_ASSERT_GET_AV;
2379 =head1 Hash Manipulation Functions
2381 =for apidoc p||get_hv
2383 Returns the HV of the specified Perl hash. C<flags> are passed to
2384 C<gv_fetchpv>. If C<GV_ADD> is set and the
2385 Perl variable does not exist then it will be created. If C<flags> is zero
2386 and the variable does not exist then NULL is returned.
2392 Perl_get_hv(pTHX_ const char *name, I32 flags)
2394 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2396 PERL_ARGS_ASSERT_GET_HV;
2406 =head1 CV Manipulation Functions
2408 =for apidoc p||get_cvn_flags
2410 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2411 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2412 exist then it will be declared (which has the same effect as saying
2413 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2414 then NULL is returned.
2416 =for apidoc p||get_cv
2418 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2424 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2426 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2427 /* XXX this is probably not what they think they're getting.
2428 * It has the same effect as "sub name;", i.e. just a forward
2431 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2433 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2434 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2435 return newSUB(start_subparse(FALSE, 0),
2436 newSVOP(OP_CONST, 0, sv),
2444 /* Nothing in core calls this now, but we can't replace it with a macro and
2445 move it to mathoms.c as a macro would evaluate name twice. */
2447 Perl_get_cv(pTHX_ const char *name, I32 flags)
2449 PERL_ARGS_ASSERT_GET_CV;
2451 return get_cvn_flags(name, strlen(name), flags);
2454 /* Be sure to refetch the stack pointer after calling these routines. */
2458 =head1 Callback Functions
2460 =for apidoc p||call_argv
2462 Performs a callback to the specified Perl sub. See L<perlcall>.
2468 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2470 /* See G_* flags in cop.h */
2471 /* null terminated arg list */
2476 PERL_ARGS_ASSERT_CALL_ARGV;
2481 mXPUSHs(newSVpv(*argv,0));
2486 return call_pv(sub_name, flags);
2490 =for apidoc p||call_pv
2492 Performs a callback to the specified Perl sub. See L<perlcall>.
2498 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2499 /* name of the subroutine */
2500 /* See G_* flags in cop.h */
2502 PERL_ARGS_ASSERT_CALL_PV;
2504 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2508 =for apidoc p||call_method
2510 Performs a callback to the specified Perl method. The blessed object must
2511 be on the stack. See L<perlcall>.
2517 Perl_call_method(pTHX_ const char *methname, I32 flags)
2518 /* name of the subroutine */
2519 /* See G_* flags in cop.h */
2522 PERL_ARGS_ASSERT_CALL_METHOD;
2524 len = strlen(methname);
2526 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2527 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2530 /* May be called with any of a CV, a GV, or an SV containing the name. */
2532 =for apidoc p||call_sv
2534 Performs a callback to the Perl sub whose name is in the SV. See
2541 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2542 /* See G_* flags in cop.h */
2545 LOGOP myop; /* fake syntax tree node */
2550 bool oldcatch = CATCH_GET;
2552 OP* const oldop = PL_op;
2555 PERL_ARGS_ASSERT_CALL_SV;
2557 if (flags & G_DISCARD) {
2561 if (!(flags & G_WANT)) {
2562 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2567 Zero(&myop, 1, LOGOP);
2568 myop.op_next = NULL;
2569 if (!(flags & G_NOARGS))
2570 myop.op_flags |= OPf_STACKED;
2571 myop.op_flags |= OP_GIMME_REVERSE(flags);
2575 EXTEND(PL_stack_sp, 1);
2576 *++PL_stack_sp = sv;
2578 oldscope = PL_scopestack_ix;
2580 if (PERLDB_SUB && PL_curstash != PL_debstash
2581 /* Handle first BEGIN of -d. */
2582 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2583 /* Try harder, since this may have been a sighandler, thus
2584 * curstash may be meaningless. */
2585 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2586 && !(flags & G_NODEBUG))
2587 PL_op->op_private |= OPpENTERSUB_DB;
2589 if (flags & G_METHOD) {
2590 Zero(&method_op, 1, UNOP);
2591 method_op.op_next = PL_op;
2592 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2593 method_op.op_type = OP_METHOD;
2594 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2595 myop.op_type = OP_ENTERSUB;
2596 PL_op = (OP*)&method_op;
2599 if (!(flags & G_EVAL)) {
2601 CALL_BODY_SUB((OP*)&myop);
2602 retval = PL_stack_sp - (PL_stack_base + oldmark);
2603 CATCH_SET(oldcatch);
2606 myop.op_other = (OP*)&myop;
2608 create_eval_scope(flags|G_FAKINGEVAL);
2616 CALL_BODY_SUB((OP*)&myop);
2617 retval = PL_stack_sp - (PL_stack_base + oldmark);
2618 if (!(flags & G_KEEPERR)) {
2626 /* my_exit() was called */
2627 PL_curstash = PL_defstash;
2634 PL_restartjmpenv = NULL;
2635 PL_op = PL_restartop;
2639 PL_stack_sp = PL_stack_base + oldmark;
2640 if ((flags & G_WANT) == G_ARRAY)
2644 *++PL_stack_sp = &PL_sv_undef;
2649 if (PL_scopestack_ix > oldscope)
2650 delete_eval_scope();
2654 if (flags & G_DISCARD) {
2655 PL_stack_sp = PL_stack_base + oldmark;
2664 /* Eval a string. The G_EVAL flag is always assumed. */
2667 =for apidoc p||eval_sv
2669 Tells Perl to C<eval> the string in the SV.
2675 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2677 /* See G_* flags in cop.h */
2681 UNOP myop; /* fake syntax tree node */
2682 VOL I32 oldmark = SP - PL_stack_base;
2685 OP* const oldop = PL_op;
2688 PERL_ARGS_ASSERT_EVAL_SV;
2690 if (flags & G_DISCARD) {
2697 Zero(PL_op, 1, UNOP);
2698 EXTEND(PL_stack_sp, 1);
2699 *++PL_stack_sp = sv;
2701 if (!(flags & G_NOARGS))
2702 myop.op_flags = OPf_STACKED;
2703 myop.op_next = NULL;
2704 myop.op_type = OP_ENTEREVAL;
2705 myop.op_flags |= OP_GIMME_REVERSE(flags);
2706 if (flags & G_KEEPERR)
2707 myop.op_flags |= OPf_SPECIAL;
2709 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2710 * before a PUSHEVAL, which corrupts the stack after a croak */
2711 TAINT_PROPER("eval_sv()");
2717 CALL_BODY_EVAL((OP*)&myop);
2718 retval = PL_stack_sp - (PL_stack_base + oldmark);
2719 if (!(flags & G_KEEPERR)) {
2727 /* my_exit() was called */
2728 PL_curstash = PL_defstash;
2735 PL_restartjmpenv = NULL;
2736 PL_op = PL_restartop;
2740 PL_stack_sp = PL_stack_base + oldmark;
2741 if ((flags & G_WANT) == G_ARRAY)
2745 *++PL_stack_sp = &PL_sv_undef;
2751 if (flags & G_DISCARD) {
2752 PL_stack_sp = PL_stack_base + oldmark;
2762 =for apidoc p||eval_pv
2764 Tells Perl to C<eval> the given string and return an SV* result.
2770 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2774 SV* sv = newSVpv(p, 0);
2776 PERL_ARGS_ASSERT_EVAL_PV;
2778 eval_sv(sv, G_SCALAR);
2785 if (croak_on_error && SvTRUE(ERRSV)) {
2786 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2792 /* Require a module. */
2795 =head1 Embedding Functions
2797 =for apidoc p||require_pv
2799 Tells Perl to C<require> the file named by the string argument. It is
2800 analogous to the Perl code C<eval "require '$file'">. It's even
2801 implemented that way; consider using load_module instead.
2806 Perl_require_pv(pTHX_ const char *pv)
2812 PERL_ARGS_ASSERT_REQUIRE_PV;
2814 PUSHSTACKi(PERLSI_REQUIRE);
2816 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2817 eval_sv(sv_2mortal(sv), G_DISCARD);
2823 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2825 /* This message really ought to be max 23 lines.
2826 * Removed -h because the user already knows that option. Others? */
2828 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2829 minimum of 509 character string literals. */
2830 static const char * const usage_msg[] = {
2831 " -0[octal] specify record separator (\\0, if no argument)\n"
2832 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2833 " -C[number/list] enables the listed Unicode features\n"
2834 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2835 " -d[:debugger] run program under debugger\n"
2836 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2837 " -e program one line of program (several -e's allowed, omit programfile)\n"
2838 " -E program like -e, but enables all optional features\n"
2839 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2840 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2841 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2842 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2843 " -l[octal] enable line ending processing, specifies line terminator\n"
2844 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2845 " -n assume \"while (<>) { ... }\" loop around program\n"
2846 " -p assume loop like -n but print line also, like sed\n"
2847 " -s enable rudimentary parsing for switches after programfile\n"
2848 " -S look for programfile using PATH environment variable\n",
2849 " -t enable tainting warnings\n"
2850 " -T enable tainting checks\n"
2851 " -u dump core after parsing program\n"
2852 " -U allow unsafe operations\n"
2853 " -v print version, patchlevel and license\n"
2854 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2855 " -w enable many useful warnings\n"
2856 " -W enable all warnings\n"
2857 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2858 " -X disable all warnings\n"
2860 "Run 'perldoc perl' for more help with Perl.\n\n",
2863 const char * const *p = usage_msg;
2864 PerlIO *out = PerlIO_stdout();
2866 PERL_ARGS_ASSERT_USAGE;
2869 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2872 PerlIO_puts(out, *p++);
2875 /* convert a string of -D options (or digits) into an int.
2876 * sets *s to point to the char after the options */
2880 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2882 static const char * const usage_msgd[] = {
2883 " Debugging flag values: (see also -d)\n"
2884 " p Tokenizing and parsing (with v, displays parse stack)\n"
2885 " s Stack snapshots (with v, displays all stacks)\n"
2886 " l Context (loop) stack processing\n"
2887 " t Trace execution\n"
2888 " o Method and overloading resolution\n",
2889 " c String/numeric conversions\n"
2890 " P Print profiling info, source file input state\n"
2891 " m Memory and SV allocation\n"
2892 " f Format processing\n"
2893 " r Regular expression parsing and execution\n"
2894 " x Syntax tree dump\n",
2895 " u Tainting checks\n"
2896 " H Hash dump -- usurps values()\n"
2897 " X Scratchpad allocation\n"
2900 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2901 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2902 " v Verbose: use in conjunction with other flags\n"
2903 " C Copy On Write\n"
2904 " A Consistency checks on internal structures\n"
2905 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2906 " M trace smart match resolution\n"
2907 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2912 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2915 /* if adding extra options, remember to update DEBUG_MASK */
2916 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2918 for (; isALNUM(**s); (*s)++) {
2919 const char * const d = strchr(debopts,**s);
2921 i |= 1 << (d - debopts);
2922 else if (ckWARN_d(WARN_DEBUGGING))
2923 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2924 "invalid option -D%c, use -D'' to see choices\n", **s);
2927 else if (isDIGIT(**s)) {
2929 for (; isALNUM(**s); (*s)++) ;
2931 else if (givehelp) {
2932 const char *const *p = usage_msgd;
2933 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2936 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2937 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2938 "-Dp not implemented on this platform\n");
2944 /* This routine handles any switches that can be given during run */
2947 Perl_moreswitches(pTHX_ const char *s)
2951 const char option = *s; /* used to remember option in -m/-M code */
2953 PERL_ARGS_ASSERT_MORESWITCHES;
2961 SvREFCNT_dec(PL_rs);
2962 if (s[1] == 'x' && s[2]) {
2963 const char *e = s+=2;
2969 flags = PERL_SCAN_SILENT_ILLDIGIT;
2970 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2971 if (s + numlen < e) {
2972 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2976 PL_rs = newSVpvs("");
2977 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2978 tmps = (U8*)SvPVX(PL_rs);
2979 uvchr_to_utf8(tmps, rschar);
2980 SvCUR_set(PL_rs, UNISKIP(rschar));
2985 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2986 if (rschar & ~((U8)~0))
2987 PL_rs = &PL_sv_undef;
2988 else if (!rschar && numlen >= 2)
2989 PL_rs = newSVpvs("");
2991 char ch = (char)rschar;
2992 PL_rs = newSVpvn(&ch, 1);
2995 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3000 PL_unicode = parse_unicode_opts( (const char **)&s );
3001 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3007 while (*s && !isSPACE(*s)) ++s;
3008 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3019 forbid_setid('d', FALSE);
3022 /* -dt indicates to the debugger that threads will be used */
3023 if (*s == 't' && !isALNUM(s[1])) {
3025 my_setenv("PERL5DB_THREADED", "1");
3028 /* The following permits -d:Mod to accepts arguments following an =
3029 in the fashion that -MSome::Mod does. */
3030 if (*s == ':' || *s == '=') {
3031 const char *start = ++s;
3032 const char *const end = s + strlen(s);
3033 SV * const sv = newSVpvs("use Devel::");
3035 /* We now allow -d:Module=Foo,Bar */
3036 while(isALNUM(*s) || *s==':') ++s;
3038 sv_catpvn(sv, start, end - start);
3040 sv_catpvn(sv, start, s-start);
3041 /* Don't use NUL as q// delimiter here, this string goes in the
3043 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3046 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3050 PL_perldb = PERLDB_ALL;
3057 forbid_setid('D', FALSE);
3059 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3060 #else /* !DEBUGGING */
3061 if (ckWARN_d(WARN_DEBUGGING))
3062 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3063 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3064 for (s++; isALNUM(*s); s++) ;
3069 usage(PL_origargv[0]);
3072 Safefree(PL_inplace);
3073 #if defined(__CYGWIN__) /* do backup extension automagically */
3074 if (*(s+1) == '\0') {
3075 PL_inplace = savepvs(".bak");
3078 #endif /* __CYGWIN__ */
3080 const char * const start = ++s;
3081 while (*s && !isSPACE(*s))
3084 PL_inplace = savepvn(start, s - start);
3088 if (*s == '-') /* Additional switches on #! line. */
3092 case 'I': /* -I handled both here and in parse_body() */
3093 forbid_setid('I', FALSE);
3095 while (*s && isSPACE(*s))
3100 /* ignore trailing spaces (possibly followed by other switches) */
3102 for (e = p; *e && !isSPACE(*e); e++) ;
3106 } while (*p && *p != '-');
3108 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3114 Perl_croak(aTHX_ "No directory specified for -I");
3120 SvREFCNT_dec(PL_ors_sv);
3126 PL_ors_sv = newSVpvs("\n");
3127 numlen = 3 + (*s == '0');
3128 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3132 if (RsPARA(PL_rs)) {
3133 PL_ors_sv = newSVpvs("\n\n");
3136 PL_ors_sv = newSVsv(PL_rs);
3141 forbid_setid('M', FALSE); /* XXX ? */
3144 forbid_setid('m', FALSE); /* XXX ? */
3149 const char *use = "use ";
3151 /* -M-foo == 'no foo' */
3152 /* Leading space on " no " is deliberate, to make both
3153 possibilities the same length. */
3154 if (*s == '-') { use = " no "; ++s; }
3155 sv = newSVpvn(use,4);
3157 /* We allow -M'Module qw(Foo Bar)' */
3158 while(isALNUM(*s) || *s==':') {
3167 Perl_croak(aTHX_ "Module name required with -%c option",
3170 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3171 "contains single ':'",
3172 (int)(s - start), start, option);
3173 end = s + strlen(s);
3175 sv_catpvn(sv, start, end - start);
3176 if (option == 'm') {
3178 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3179 sv_catpvs( sv, " ()");
3182 sv_catpvn(sv, start, s-start);
3183 /* Use NUL as q''-delimiter. */
3184 sv_catpvs(sv, " split(/,/,q\0");
3186 sv_catpvn(sv, s, end - s);
3187 sv_catpvs(sv, "\0)");
3190 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3193 Perl_croak(aTHX_ "Missing argument to -%c", option);
3204 forbid_setid('s', FALSE);
3205 PL_doswitches = TRUE;
3219 PL_do_undump = TRUE;
3227 if (!sv_derived_from(PL_patchlevel, "version"))
3228 upg_version(PL_patchlevel, TRUE);
3231 SV* level= vstringify(PL_patchlevel);
3232 #ifdef PERL_PATCHNUM
3233 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3234 SV *num = newSVpvs(PERL_PATCHNUM "*");
3236 SV *num = newSVpvs(PERL_PATCHNUM);
3239 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3240 SvREFCNT_dec(level);
3243 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3247 PerlIO_printf(PerlIO_stdout(),
3248 "\nThis is perl " STRINGIFY(PERL_REVISION)
3249 ", version " STRINGIFY(PERL_VERSION)
3250 ", subversion " STRINGIFY(PERL_SUBVERSION)
3251 " (%"SVf") built for " ARCHNAME, level
3253 SvREFCNT_dec(level);
3256 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3257 PerlIO_printf(PerlIO_stdout(),
3258 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3259 SVfARG(vstringify(PL_patchlevel))));
3260 PerlIO_printf(PerlIO_stdout(),
3261 Perl_form(aTHX_ " built under %s at %s %s\n",
3262 OSNAME, __DATE__, __TIME__));
3263 PerlIO_printf(PerlIO_stdout(),
3264 Perl_form(aTHX_ " OS Specific Release: %s\n",
3267 #if defined(LOCAL_PATCH_COUNT)
3268 if (LOCAL_PATCH_COUNT > 0)
3269 PerlIO_printf(PerlIO_stdout(),
3270 "\n(with %d registered patch%s, "
3271 "see perl -V for more detail)",
3273 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3276 PerlIO_printf(PerlIO_stdout(),
3277 "\n\nCopyright 1987-2010, Larry Wall\n");
3279 PerlIO_printf(PerlIO_stdout(),
3280 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3285 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3288 PerlIO_printf(PerlIO_stdout(),
3289 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3290 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3293 PerlIO_printf(PerlIO_stdout(),
3294 "atariST series port, ++jrb bammi@cadence.com\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "EPOC port by Olaf Flebbe, 1999-2002\n");
3325 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3326 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3329 #ifdef __SYMBIAN32__
3330 PerlIO_printf(PerlIO_stdout(),
3331 "Symbian port by Nokia, 2004-2005\n");
3333 #ifdef BINARY_BUILD_NOTICE
3334 BINARY_BUILD_NOTICE;
3336 PerlIO_printf(PerlIO_stdout(),
3338 Perl may be copied only under the terms of either the Artistic License or the\n\
3339 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3340 Complete documentation for Perl, including FAQ lists, should be found on\n\
3341 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3342 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3345 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3346 PL_dowarn |= G_WARN_ON;
3351 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3352 if (!specialWARN(PL_compiling.cop_warnings))
3353 PerlMemShared_free(PL_compiling.cop_warnings);
3354 PL_compiling.cop_warnings = pWARN_ALL ;
3358 PL_dowarn = G_WARN_ALL_OFF;
3359 if (!specialWARN(PL_compiling.cop_warnings))
3360 PerlMemShared_free(PL_compiling.cop_warnings);
3361 PL_compiling.cop_warnings = pWARN_NONE ;
3368 if (s[0] == '-') /* Additional switches on #! line. */
3373 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3379 #ifdef ALTERNATE_SHEBANG
3380 case 'S': /* OS/2 needs -S on "extproc" line. */
3384 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3389 /* compliments of Tom Christiansen */
3391 /* unexec() can be found in the Gnu emacs distribution */
3392 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3395 Perl_my_unexec(pTHX)
3397 PERL_UNUSED_CONTEXT;
3399 SV * prog = newSVpv(BIN_EXP, 0);
3400 SV * file = newSVpv(PL_origfilename, 0);
3404 sv_catpvs(prog, "/perl");
3405 sv_catpvs(file, ".perldump");
3407 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3408 /* unexec prints msg to stderr in case of failure */
3409 PerlProc_exit(status);
3412 # include <lib$routines.h>
3413 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3414 # elif defined(WIN32) || defined(__CYGWIN__)
3415 Perl_croak(aTHX_ "dump is not supported");
3417 ABORT(); /* for use with undump */
3422 /* initialize curinterp */
3428 # define PERLVAR(var,type)
3429 # define PERLVARA(var,n,type)
3430 # if defined(PERL_IMPLICIT_CONTEXT)
3431 # define PERLVARI(var,type,init) aTHX->var = init;
3432 # define PERLVARIC(var,type,init) aTHX->var = init;
3434 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3435 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3437 # include "intrpvar.h"
3443 # define PERLVAR(var,type)
3444 # define PERLVARA(var,n,type)
3445 # define PERLVARI(var,type,init) PL_##var = init;
3446 # define PERLVARIC(var,type,init) PL_##var = init;
3447 # include "intrpvar.h"
3454 /* As these are inside a structure, PERLVARI isn't capable of initialising
3456 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3457 PL_reg_poscache = PL_reg_starttry = NULL;
3461 S_init_main_stash(pTHX)
3466 PL_curstash = PL_defstash = newHV();
3467 /* We know that the string "main" will be in the global shared string
3468 table, so it's a small saving to use it rather than allocate another
3470 PL_curstname = newSVpvs_share("main");
3471 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3472 /* If we hadn't caused another reference to "main" to be in the shared
3473 string table above, then it would be worth reordering these two,
3474 because otherwise all we do is delete "main" from it as a consequence
3475 of the SvREFCNT_dec, only to add it again with hv_name_set */
3476 SvREFCNT_dec(GvHV(gv));
3477 hv_name_set(PL_defstash, "main", 4, 0);
3478 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3480 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3482 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3483 GvMULTI_on(PL_incgv);
3484 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3485 GvMULTI_on(PL_hintgv);
3486 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3487 SvREFCNT_inc_simple_void(PL_defgv);
3488 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3489 SvREFCNT_inc_simple_void(PL_errgv);
3490 GvMULTI_on(PL_errgv);
3491 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3492 GvMULTI_on(PL_replgv);
3493 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3494 #ifdef PERL_DONT_CREATE_GVSV
3497 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3499 PL_curstash = PL_defstash;
3500 CopSTASH_set(&PL_compiling, PL_defstash);
3501 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3502 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3504 /* We must init $/ before switches are processed. */
3505 sv_setpvs(get_sv("/", GV_ADD), "\n");
3509 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3510 bool *suidscript, PerlIO **rsfpp)
3515 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3518 PL_origfilename = savepvs("-e");
3521 /* if find_script() returns, it returns a malloc()-ed value */
3522 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3524 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3525 const char *s = scriptname + 8;
3531 * Tell apart "normal" usage of fdscript, e.g.
3532 * with bash on FreeBSD:
3533 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3534 * from usage in suidperl.
3535 * Does any "normal" usage leave garbage after the number???
3536 * Is it a mistake to use a similar /dev/fd/ construct for
3541 * Be supersafe and do some sanity-checks.
3542 * Still, can we be sure we got the right thing?
3545 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3548 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3550 scriptname = savepv(s + 1);
3551 Safefree(PL_origfilename);
3552 PL_origfilename = (char *)scriptname;
3557 CopFILE_free(PL_curcop);
3558 CopFILE_set(PL_curcop, PL_origfilename);
3559 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3560 scriptname = (char *)"";
3561 if (fdscript >= 0) {
3562 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3563 # if defined(HAS_FCNTL) && defined(F_SETFD)
3565 /* ensure close-on-exec */
3566 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3569 else if (!*scriptname) {
3570 forbid_setid(0, *suidscript);
3571 *rsfpp = PerlIO_stdin();
3574 #ifdef FAKE_BIT_BUCKET
3575 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3576 * is called) and still have the "-e" work. (Believe it or not,
3577 * a /dev/null is required for the "-e" to work because source
3578 * filter magic is used to implement it. ) This is *not* a general
3579 * replacement for a /dev/null. What we do here is create a temp
3580 * file (an empty file), open up that as the script, and then
3581 * immediately close and unlink it. Close enough for jazz. */
3582 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3583 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3584 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3585 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3586 FAKE_BIT_BUCKET_TEMPLATE
3588 const char * const err = "Failed to create a fake bit bucket";
3589 if (strEQ(scriptname, BIT_BUCKET)) {
3590 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3591 int tmpfd = mkstemp(tmpname);
3593 scriptname = tmpname;
3596 Perl_croak(aTHX_ err);
3599 scriptname = mktemp(tmpname);
3601 Perl_croak(aTHX_ err);
3606 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3607 #ifdef FAKE_BIT_BUCKET
3608 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3609 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3610 && strlen(scriptname) == sizeof(tmpname) - 1) {
3613 scriptname = BIT_BUCKET;
3615 # if defined(HAS_FCNTL) && defined(F_SETFD)
3617 /* ensure close-on-exec */
3618 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3622 /* PSz 16 Sep 03 Keep neat error message */
3624 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3626 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3627 CopFILE(PL_curcop), Strerror(errno));
3633 * I_SYSSTATVFS HAS_FSTATVFS
3635 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3636 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3637 * here so that metaconfig picks them up. */
3640 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3641 /* Don't even need this function. */
3644 S_validate_suid(pTHX_ PerlIO *rsfp)
3646 PERL_ARGS_ASSERT_VALIDATE_SUID;
3648 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3651 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3652 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3654 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3657 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3658 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3659 /* not set-id, must be wrapped */
3662 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3665 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3669 register const char *s2;
3671 PERL_ARGS_ASSERT_FIND_BEGINNING;
3673 /* skip forward in input to the real script? */
3675 while (PL_doextract) {
3676 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3677 Perl_croak(aTHX_ "No Perl script found in input\n");
3679 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3680 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3681 PL_doextract = FALSE;
3682 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3684 while (*s == ' ' || *s == '\t') s++;
3686 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3687 || s2[-1] == '_') s2--;
3688 if (strnEQ(s2-4,"perl",4))
3689 while ((s = moreswitches(s)))
3701 PL_uid = PerlProc_getuid();
3702 PL_euid = PerlProc_geteuid();
3703 PL_gid = PerlProc_getgid();
3704 PL_egid = PerlProc_getegid();
3706 PL_uid |= PL_gid << 16;
3707 PL_euid |= PL_egid << 16;
3709 /* Should not happen: */
3710 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3711 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3714 * Should go by suidscript, not uid!=euid: why disallow
3715 * system("ls") in scripts run from setuid things?
3716 * Or, is this run before we check arguments and set suidscript?
3717 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3718 * (We never have suidscript, can we be sure to have fdscript?)
3719 * Or must then go by UID checks? See comments in forbid_setid also.
3723 /* This is used very early in the lifetime of the program,
3724 * before even the options are parsed, so PL_tainting has
3725 * not been initialized properly. */
3727 Perl_doing_taint(int argc, char *argv[], char *envp[])
3729 #ifndef PERL_IMPLICIT_SYS
3730 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3731 * before we have an interpreter-- and the whole point of this
3732 * function is to be called at such an early stage. If you are on
3733 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3734 * "tainted because running with altered effective ids', you'll
3735 * have to add your own checks somewhere in here. The two most
3736 * known samples of 'implicitness' are Win32 and NetWare, neither
3737 * of which has much of concept of 'uids'. */
3738 int uid = PerlProc_getuid();
3739 int euid = PerlProc_geteuid();
3740 int gid = PerlProc_getgid();
3741 int egid = PerlProc_getegid();
3748 if (uid && (euid != uid || egid != gid))
3750 #endif /* !PERL_IMPLICIT_SYS */
3751 /* This is a really primitive check; environment gets ignored only
3752 * if -T are the first chars together; otherwise one gets
3753 * "Too late" message. */
3754 if ( argc > 1 && argv[1][0] == '-'
3755 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3760 /* Passing the flag as a single char rather than a string is a slight space
3761 optimisation. The only message that isn't /^-.$/ is
3762 "program input from stdin", which is substituted in place of '\0', which
3763 could never be a command line flag. */
3765 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3768 char string[3] = "-x";
3769 const char *message = "program input from stdin";
3776 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3777 if (PL_euid != PL_uid)
3778 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3779 if (PL_egid != PL_gid)
3780 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3781 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3783 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3787 Perl_init_dbargs(pTHX)
3789 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3794 /* Someone has already created it.
3795 It might have entries, and if we just turn off AvREAL(), they will
3796 "leak" until global destruction. */
3799 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3803 Perl_init_debugger(pTHX)
3806 HV * const ostash = PL_curstash;
3808 PL_curstash = PL_debstash;
3810 Perl_init_dbargs(aTHX);
3811 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3812 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3813 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3814 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3815 if (!SvIOK(PL_DBsingle))
3816 sv_setiv(PL_DBsingle, 0);
3817 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3818 if (!SvIOK(PL_DBtrace))
3819 sv_setiv(PL_DBtrace, 0);
3820 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3821 if (!SvIOK(PL_DBsignal))
3822 sv_setiv(PL_DBsignal, 0);
3823 PL_curstash = ostash;
3826 #ifndef STRESS_REALLOC
3827 #define REASONABLE(size) (size)
3829 #define REASONABLE(size) (1) /* unreasonable */
3833 Perl_init_stacks(pTHX)
3836 /* start with 128-item stack and 8K cxstack */
3837 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3838 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3839 PL_curstackinfo->si_type = PERLSI_MAIN;
3840 PL_curstack = PL_curstackinfo->si_stack;
3841 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3843 PL_stack_base = AvARRAY(PL_curstack);
3844 PL_stack_sp = PL_stack_base;
3845 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3847 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3850 PL_tmps_max = REASONABLE(128);
3852 Newx(PL_markstack,REASONABLE(32),I32);
3853 PL_markstack_ptr = PL_markstack;
3854 PL_markstack_max = PL_markstack + REASONABLE(32);
3858 Newx(PL_scopestack,REASONABLE(32),I32);
3860 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3862 PL_scopestack_ix = 0;
3863 PL_scopestack_max = REASONABLE(32);
3865 Newx(PL_savestack,REASONABLE(128),ANY);
3866 PL_savestack_ix = 0;
3867 PL_savestack_max = REASONABLE(128);
3876 while (PL_curstackinfo->si_next)
3877 PL_curstackinfo = PL_curstackinfo->si_next;
3878 while (PL_curstackinfo) {
3879 PERL_SI *p = PL_curstackinfo->si_prev;
3880 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3881 Safefree(PL_curstackinfo->si_cxstack);
3882 Safefree(PL_curstackinfo);
3883 PL_curstackinfo = p;
3885 Safefree(PL_tmps_stack);
3886 Safefree(PL_markstack);
3887 Safefree(PL_scopestack);
3889 Safefree(PL_scopestack_name);
3891 Safefree(PL_savestack);
3896 S_init_predump_symbols(pTHX)
3903 sv_setpvs(get_sv("\"", GV_ADD), " ");
3904 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3907 /* Historically, PVIOs were blessed into IO::Handle, unless
3908 FileHandle was loaded, in which case they were blessed into
3909 that. Action at a distance.
3910 However, if we simply bless into IO::Handle, we break code
3911 that assumes that PVIOs will have (among others) a seek
3912 method. IO::File inherits from IO::Handle and IO::Seekable,
3913 and provides the needed methods. But if we simply bless into
3914 it, then we break code that assumed that by loading
3915 IO::Handle, *it* would work.
3916 So a compromise is to set up the correct @IO::File::ISA,
3917 so that code that does C<use IO::Handle>; will still work.
3920 isa = get_av("IO::File::ISA", GV_ADD | GV_ADDMULTI);
3921 av_push(isa, newSVpvs("IO::Handle"));
3922 av_push(isa, newSVpvs("IO::Seekable"));
3923 av_push(isa, newSVpvs("Exporter"));
3924 (void) gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVGV);
3925 (void) gv_fetchpvs("IO::Seekable::", GV_ADD, SVt_PVGV);
3926 (void) gv_fetchpvs("Exporter::", GV_ADD, SVt_PVGV);
3929 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3930 GvMULTI_on(PL_stdingv);
3931 io = GvIOp(PL_stdingv);
3932 IoTYPE(io) = IoTYPE_RDONLY;
3933 IoIFP(io) = PerlIO_stdin();
3934 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3936 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3938 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3941 IoTYPE(io) = IoTYPE_WRONLY;
3942 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3944 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3946 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3948 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3949 GvMULTI_on(PL_stderrgv);
3950 io = GvIOp(PL_stderrgv);
3951 IoTYPE(io) = IoTYPE_WRONLY;
3952 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3953 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3955 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3957 PL_statname = newSV(0); /* last filename we did stat on */
3961 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3965 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3967 argc--,argv++; /* skip name of script */
3968 if (PL_doswitches) {
3969 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3973 if (argv[0][1] == '-' && !argv[0][2]) {
3977 if ((s = strchr(argv[0], '='))) {
3978 const char *const start_name = argv[0] + 1;
3979 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3980 TRUE, SVt_PV)), s + 1);
3983 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3986 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3987 GvMULTI_on(PL_argvgv);
3988 (void)gv_AVadd(PL_argvgv);
3989 av_clear(GvAVn(PL_argvgv));
3990 for (; argc > 0; argc--,argv++) {
3991 SV * const sv = newSVpv(argv[0],0);
3992 av_push(GvAVn(PL_argvgv),sv);
3993 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3994 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
3997 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
3998 (void)sv_utf8_decode(sv);
4004 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4009 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4011 PL_toptarget = newSV_type(SVt_PVFM);
4012 sv_setpvs(PL_toptarget, "");
4013 PL_bodytarget = newSV_type(SVt_PVFM);
4014 sv_setpvs(PL_bodytarget, "");
4015 PL_formtarget = PL_bodytarget;
4019 init_argv_symbols(argc,argv);
4021 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4022 sv_setpv(GvSV(tmpgv),PL_origfilename);
4024 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4026 bool env_is_not_environ;
4027 GvMULTI_on(PL_envgv);
4028 hv = GvHVn(PL_envgv);
4029 hv_magic(hv, NULL, PERL_MAGIC_env);
4031 #ifdef USE_ENVIRON_ARRAY
4032 /* Note that if the supplied env parameter is actually a copy
4033 of the global environ then it may now point to free'd memory
4034 if the environment has been modified since. To avoid this
4035 problem we treat env==NULL as meaning 'use the default'
4039 env_is_not_environ = env != environ;
4040 if (env_is_not_environ
4041 # ifdef USE_ITHREADS
4042 && PL_curinterp == aTHX
4051 for (; *env; env++) {
4054 if (!(s = strchr(old_var,'=')) || s == old_var)
4057 #if defined(MSDOS) && !defined(DJGPP)
4059 (void)strupr(old_var);
4062 sv = newSVpv(s+1, 0);
4063 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4064 if (env_is_not_environ)
4068 #endif /* USE_ENVIRON_ARRAY */
4069 #endif /* !PERL_MICRO */
4072 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4073 SvREADONLY_off(GvSV(tmpgv));
4074 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4075 SvREADONLY_on(GvSV(tmpgv));
4077 #ifdef THREADS_HAVE_PIDS
4078 PL_ppid = (IV)getppid();
4081 /* touch @F array to prevent spurious warnings 20020415 MJD */
4083 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4088 S_init_perllib(pTHX)
4092 const char *perl5lib = NULL;
4095 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4101 perl5lib = PerlEnv_getenv("PERL5LIB");
4103 * It isn't possible to delete an environment variable with
4104 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4105 * case we treat PERL5LIB as undefined if it has a zero-length value.
4107 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4108 if (perl5lib && *perl5lib != '\0')
4112 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4114 s = PerlEnv_getenv("PERLLIB");
4116 incpush_use_sep(s, 0, 0);
4119 /* Treat PERL5?LIB as a possible search list logical name -- the
4120 * "natural" VMS idiom for a Unix path string. We allow each
4121 * element to be a set of |-separated directories for compatibility.
4125 if (my_trnlnm("PERL5LIB",buf,0))
4127 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4128 } while (my_trnlnm("PERL5LIB",buf,++idx));
4130 while (my_trnlnm("PERLLIB",buf,idx++))
4131 incpush_use_sep(buf, 0, 0);
4136 #ifndef PERL_IS_MINIPERL
4137 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4138 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4140 /* Use the ~-expanded versions of APPLLIB (undocumented),
4141 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4144 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4145 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4149 /* sitearch is always relative to sitelib on Windows for
4150 * DLL-based path intuition to work correctly */
4151 # if !defined(WIN32)
4152 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4153 INCPUSH_CAN_RELOCATE);
4159 /* this picks up sitearch as well */
4160 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4162 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4164 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4168 #ifdef PERL_VENDORARCH_EXP
4169 /* vendorarch is always relative to vendorlib on Windows for
4170 * DLL-based path intuition to work correctly */
4171 # if !defined(WIN32)
4172 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4173 INCPUSH_CAN_RELOCATE);
4177 #ifdef PERL_VENDORLIB_EXP
4179 /* this picks up vendorarch as well */
4180 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4182 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4184 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4185 INCPUSH_CAN_RELOCATE);
4190 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4194 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4198 s = win32_get_privlib(PERL_FS_VERSION, &len);
4200 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4203 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4205 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4209 #ifdef PERL_OTHERLIBDIRS
4210 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4211 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4212 |INCPUSH_CAN_RELOCATE);
4218 * It isn't possible to delete an environment variable with
4219 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4220 * case we treat PERL5LIB as undefined if it has a zero-length value.
4222 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4223 if (perl5lib && *perl5lib != '\0')
4227 incpush_use_sep(perl5lib, 0,
4228 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4230 /* Treat PERL5?LIB as a possible search list logical name -- the
4231 * "natural" VMS idiom for a Unix path string. We allow each
4232 * element to be a set of |-separated directories for compatibility.
4236 if (my_trnlnm("PERL5LIB",buf,0))
4238 incpush_use_sep(buf, 0,
4239 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4240 } while (my_trnlnm("PERL5LIB",buf,++idx));
4244 /* Use the ~-expanded versions of APPLLIB (undocumented),
4245 SITELIB and VENDORLIB for older versions
4248 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4249 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4252 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4253 /* Search for version-specific dirs below here */
4254 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4255 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4259 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4260 /* Search for version-specific dirs below here */
4261 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4262 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4265 #ifdef PERL_OTHERLIBDIRS
4266 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4267 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4268 |INCPUSH_CAN_RELOCATE);
4270 #endif /* !PERL_IS_MINIPERL */
4273 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4276 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4277 # define PERLLIB_SEP ';'
4280 # define PERLLIB_SEP '|'
4282 # define PERLLIB_SEP ':'
4285 #ifndef PERLLIB_MANGLE
4286 # define PERLLIB_MANGLE(s,n) (s)
4289 /* Push a directory onto @INC if it exists.
4290 Generate a new SV if we do this, to save needing to copy the SV we push
4293 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4298 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4300 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4301 S_ISDIR(tmpstatbuf.st_mode)) {
4303 dir = newSVsv(stem);
4305 /* Truncate dir back to stem. */
4306 SvCUR_set(dir, SvCUR(stem));
4312 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4315 const U8 using_sub_dirs
4316 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4317 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4318 const U8 add_versioned_sub_dirs
4319 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4320 const U8 add_archonly_sub_dirs
4321 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4322 #ifdef PERL_INC_VERSION_LIST
4323 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4325 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4326 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4327 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4328 AV *const inc = GvAVn(PL_incgv);
4330 PERL_ARGS_ASSERT_INCPUSH;
4333 /* Could remove this vestigial extra block, if we don't mind a lot of
4334 re-indenting diff noise. */
4337 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4338 arranged to unshift #! line -I onto the front of @INC. However,
4339 -I can add version and architecture specific libraries, and they
4340 need to go first. The old code assumed that it was always
4341 pushing. Hence to make it work, need to push the architecture
4342 (etc) libraries onto a temporary array, then "unshift" that onto
4343 the front of @INC. */
4344 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4347 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4348 defined to so something (in os2/os2.c), but the code has been
4349 this way, ignoring any possible changed of length, since
4350 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4352 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4354 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4357 /* Do the if() outside the #ifdef to avoid warnings about an unused
4360 #ifdef PERL_RELOCATABLE_INC
4362 * Relocatable include entries are marked with a leading .../
4365 * 0: Remove that leading ".../"
4366 * 1: Remove trailing executable name (anything after the last '/')
4367 * from the perl path to give a perl prefix
4369 * While the @INC element starts "../" and the prefix ends with a real
4370 * directory (ie not . or ..) chop that real directory off the prefix
4371 * and the leading "../" from the @INC element. ie a logical "../"
4373 * Finally concatenate the prefix and the remainder of the @INC element
4374 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4375 * generates /usr/local/lib/perl5
4377 const char *libpath = SvPVX(libdir);
4378 STRLEN libpath_len = SvCUR(libdir);
4379 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4381 SV * const caret_X = get_sv("\030", 0);
4382 /* Going to use the SV just as a scratch buffer holding a C
4388 /* $^X is *the* source of taint if tainting is on, hence
4389 SvPOK() won't be true. */
4391 assert(SvPOKp(caret_X));
4392 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4394 /* Firstly take off the leading .../
4395 If all else fail we'll do the paths relative to the current
4397 sv_chop(libdir, libpath + 4);
4398 /* Don't use SvPV as we're intentionally bypassing taining,
4399 mortal copies that the mg_get of tainting creates, and
4400 corruption that seems to come via the save stack.
4401 I guess that the save stack isn't correctly set up yet. */
4402 libpath = SvPVX(libdir);
4403 libpath_len = SvCUR(libdir);
4405 /* This would work more efficiently with memrchr, but as it's
4406 only a GNU extension we'd need to probe for it and
4407 implement our own. Not hard, but maybe not worth it? */
4409 prefix = SvPVX(prefix_sv);
4410 lastslash = strrchr(prefix, '/');
4412 /* First time in with the *lastslash = '\0' we just wipe off
4413 the trailing /perl from (say) /usr/foo/bin/perl
4417 while ((*lastslash = '\0'), /* Do that, come what may. */
4418 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4419 && (lastslash = strrchr(prefix, '/')))) {
4420 if (lastslash[1] == '\0'
4421 || (lastslash[1] == '.'
4422 && (lastslash[2] == '/' /* ends "/." */
4423 || (lastslash[2] == '/'
4424 && lastslash[3] == '/' /* or "/.." */
4426 /* Prefix ends "/" or "/." or "/..", any of which
4427 are fishy, so don't do any more logical cleanup.
4431 /* Remove leading "../" from path */
4434 /* Next iteration round the loop removes the last
4435 directory name from prefix by writing a '\0' in
4436 the while clause. */
4438 /* prefix has been terminated with a '\0' to the correct
4439 length. libpath points somewhere into the libdir SV.
4440 We need to join the 2 with '/' and drop the result into
4442 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4443 SvREFCNT_dec(libdir);
4444 /* And this is the new libdir. */
4447 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4448 /* Need to taint reloccated paths if running set ID */
4449 SvTAINTED_on(libdir);
4452 SvREFCNT_dec(prefix_sv);
4457 * BEFORE pushing libdir onto @INC we may first push version- and
4458 * archname-specific sub-directories.
4460 if (using_sub_dirs) {
4462 #ifdef PERL_INC_VERSION_LIST
4463 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4464 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4465 const char * const *incver;
4472 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4474 while (unix[len-1] == '/') len--; /* Cosmetic */
4475 sv_usepvn(libdir,unix,len);
4478 PerlIO_printf(Perl_error_log,
4479 "Failed to unixify @INC element \"%s\"\n",
4483 subdir = newSVsv(libdir);
4485 if (add_versioned_sub_dirs) {
4486 /* .../version/archname if -d .../version/archname */
4487 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4488 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4490 /* .../version if -d .../version */
4491 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4492 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4495 #ifdef PERL_INC_VERSION_LIST
4497 for (incver = incverlist; *incver; incver++) {
4498 /* .../xxx if -d .../xxx */
4499 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4500 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4505 if (add_archonly_sub_dirs) {
4506 /* .../archname if -d .../archname */
4507 sv_catpvs(subdir, "/" ARCHNAME);
4508 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4512 assert (SvREFCNT(subdir) == 1);
4513 SvREFCNT_dec(subdir);
4516 /* finally add this lib directory at the end of @INC */
4518 U32 extra = av_len(av) + 1;
4519 av_unshift(inc, extra + push_basedir);
4521 av_store(inc, extra, libdir);
4523 /* av owns a reference, av_store() expects to be donated a
4524 reference, and av expects to be sane when it's cleared.
4525 If I wanted to be naughty and wrong, I could peek inside the
4526 implementation of av_clear(), realise that it uses
4527 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4528 and so directly steal from it (with a memcpy() to inc, and
4529 then memset() to NULL them out. But people copy code from the
4530 core expecting it to be best practise, so let's use the API.
4531 Although studious readers will note that I'm not checking any
4533 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4537 else if (push_basedir) {
4538 av_push(inc, libdir);
4541 if (!push_basedir) {
4542 assert (SvREFCNT(libdir) == 1);
4543 SvREFCNT_dec(libdir);
4549 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4553 /* This logic has been broken out from S_incpush(). It may be possible to
4556 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4563 /* Break at all separators */
4564 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4566 /* skip any consecutive separators */
4568 /* Uncomment the next line for PATH semantics */
4569 /* But you'll need to write tests */
4570 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4572 incpush(p, (STRLEN)(s - p), flags);
4577 incpush(p, (STRLEN)(end - p), flags);
4582 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4586 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4592 PERL_ARGS_ASSERT_CALL_LIST;
4594 while (av_len(paramList) >= 0) {
4595 cv = MUTABLE_CV(av_shift(paramList));
4597 if (paramList == PL_beginav) {
4598 /* save PL_beginav for compiler */
4599 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4601 else if (paramList == PL_checkav) {
4602 /* save PL_checkav for compiler */
4603 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4605 else if (paramList == PL_unitcheckav) {
4606 /* save PL_unitcheckav for compiler */
4607 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4618 PL_madskills |= 16384;
4623 PL_madskills &= ~16384;
4626 (void)SvPV_const(atsv, len);
4628 PL_curcop = &PL_compiling;
4629 CopLINE_set(PL_curcop, oldline);
4630 if (paramList == PL_beginav)
4631 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4633 Perl_sv_catpvf(aTHX_ atsv,
4634 "%s failed--call queue aborted",
4635 paramList == PL_checkav ? "CHECK"
4636 : paramList == PL_initav ? "INIT"
4637 : paramList == PL_unitcheckav ? "UNITCHECK"
4639 while (PL_scopestack_ix > oldscope)
4642 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4649 /* my_exit() was called */
4650 while (PL_scopestack_ix > oldscope)
4653 PL_curstash = PL_defstash;
4654 PL_curcop = &PL_compiling;
4655 CopLINE_set(PL_curcop, oldline);
4661 PL_curcop = &PL_compiling;
4662 CopLINE_set(PL_curcop, oldline);
4665 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4674 Perl_my_exit(pTHX_ U32 status)
4685 STATUS_EXIT_SET(status);
4692 Perl_my_failure_exit(pTHX)
4696 /* We have been called to fall on our sword. The desired exit code
4697 * should be already set in STATUS_UNIX, but could be shifted over
4698 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4701 * If an error code has not been set, then force the issue.
4703 if (MY_POSIX_EXIT) {
4705 /* According to the die_exit.t tests, if errno is non-zero */
4706 /* It should be used for the error status. */
4708 if (errno == EVMSERR) {
4709 STATUS_NATIVE = vaxc$errno;
4712 /* According to die_exit.t tests, if the child_exit code is */
4713 /* also zero, then we need to exit with a code of 255 */
4714 if ((errno != 0) && (errno < 256))
4715 STATUS_UNIX_EXIT_SET(errno);
4716 else if (STATUS_UNIX < 255) {
4717 STATUS_UNIX_EXIT_SET(255);
4722 /* The exit code could have been set by $? or vmsish which
4723 * means that it may not have fatal set. So convert
4724 * success/warning codes to fatal with out changing
4725 * the POSIX status code. The severity makes VMS native
4726 * status handling work, while UNIX mode programs use the
4727 * the POSIX exit codes.
4729 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4730 STATUS_NATIVE &= STS$M_COND_ID;
4731 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4735 /* Traditionally Perl on VMS always expects a Fatal Error. */
4736 if (vaxc$errno & 1) {
4738 /* So force success status to failure */
4739 if (STATUS_NATIVE & 1)
4744 STATUS_UNIX = EINTR; /* In case something cares */
4749 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4751 /* Encode the severity code */
4752 severity = STATUS_NATIVE & STS$M_SEVERITY;
4753 STATUS_UNIX = (severity ? severity : 1) << 8;
4755 /* Perl expects this to be a fatal error */
4756 if (severity != STS$K_SEVERE)
4765 STATUS_UNIX_SET(errno);
4767 exitstatus = STATUS_UNIX >> 8;
4768 if (exitstatus & 255)
4769 STATUS_UNIX_SET(exitstatus);
4771 STATUS_UNIX_SET(255);
4778 S_my_exit_jump(pTHX)
4783 SvREFCNT_dec(PL_e_script);
4787 POPSTACK_TO(PL_mainstack);
4795 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4798 const char * const p = SvPVX_const(PL_e_script);
4799 const char *nl = strchr(p, '\n');
4801 PERL_UNUSED_ARG(idx);
4802 PERL_UNUSED_ARG(maxlen);
4804 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4806 filter_del(read_e_script);
4809 sv_catpvn(buf_sv, p, nl-p);
4810 sv_chop(PL_e_script, nl);
4816 * c-indentation-style: bsd
4818 * indent-tabs-mode: t
4821 * ex: set ts=8 sts=4 sw=4 noet: