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. */
1045 /* break ref loop *:: <=> %:: */
1046 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1049 SvREFCNT_dec(PL_curstname);
1050 PL_curstname = NULL;
1052 /* clear queued errors */
1053 SvREFCNT_dec(PL_errors);
1056 SvREFCNT_dec(PL_isarev);
1059 if (destruct_level >= 2) {
1060 if (PL_scopestack_ix != 0)
1061 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1062 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1063 (long)PL_scopestack_ix);
1064 if (PL_savestack_ix != 0)
1065 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1066 "Unbalanced saves: %ld more saves than restores\n",
1067 (long)PL_savestack_ix);
1068 if (PL_tmps_floor != -1)
1069 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1070 (long)PL_tmps_floor + 1);
1071 if (cxstack_ix != -1)
1072 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1073 (long)cxstack_ix + 1);
1076 #ifdef PERL_IMPLICIT_CONTEXT
1077 /* the entries in this list are allocated via SV PVX's, so get freed
1078 * in sv_clean_all */
1079 Safefree(PL_my_cxt_list);
1082 /* Now absolutely destruct everything, somehow or other, loops or no. */
1084 /* the 2 is for PL_fdpid and PL_strtab */
1085 while (sv_clean_all() > 2)
1088 AvREAL_off(PL_fdpid); /* no surviving entries */
1089 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1092 #ifdef HAVE_INTERP_INTERN
1096 /* Destruct the global string table. */
1098 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1099 * so that sv_free() won't fail on them.
1100 * Now that the global string table is using a single hunk of memory
1101 * for both HE and HEK, we either need to explicitly unshare it the
1102 * correct way, or actually free things here.
1105 const I32 max = HvMAX(PL_strtab);
1106 HE * const * const array = HvARRAY(PL_strtab);
1107 HE *hent = array[0];
1110 if (hent && ckWARN_d(WARN_INTERNAL)) {
1111 HE * const next = HeNEXT(hent);
1112 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1113 "Unbalanced string table refcount: (%ld) for \"%s\"",
1114 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1121 hent = array[riter];
1126 HvARRAY(PL_strtab) = 0;
1127 HvTOTALKEYS(PL_strtab) = 0;
1129 SvREFCNT_dec(PL_strtab);
1132 /* free the pointer tables used for cloning */
1133 ptr_table_free(PL_ptr_table);
1134 PL_ptr_table = (PTR_TBL_t*)NULL;
1137 /* free special SVs */
1139 SvREFCNT(&PL_sv_yes) = 0;
1140 sv_clear(&PL_sv_yes);
1141 SvANY(&PL_sv_yes) = NULL;
1142 SvFLAGS(&PL_sv_yes) = 0;
1144 SvREFCNT(&PL_sv_no) = 0;
1145 sv_clear(&PL_sv_no);
1146 SvANY(&PL_sv_no) = NULL;
1147 SvFLAGS(&PL_sv_no) = 0;
1151 for (i=0; i<=2; i++) {
1152 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1153 sv_clear(PERL_DEBUG_PAD(i));
1154 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1155 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1159 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1160 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1162 #ifdef DEBUG_LEAKING_SCALARS
1163 if (PL_sv_count != 0) {
1168 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1169 svend = &sva[SvREFCNT(sva)];
1170 for (sv = sva + 1; sv < svend; ++sv) {
1171 if (SvTYPE(sv) != SVTYPEMASK) {
1172 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1174 " refcnt=%"UVuf pTHX__FORMAT "\n"
1175 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1177 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1179 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1181 sv->sv_debug_inpad ? "for" : "by",
1182 sv->sv_debug_optype ?
1183 PL_op_name[sv->sv_debug_optype]: "(none)",
1184 PTR2UV(sv->sv_debug_parent),
1187 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1188 Perl_dump_sv_child(aTHX_ sv);
1194 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1198 /* Wait for up to 4 seconds for child to terminate.
1199 This seems to be the least effort way of timing out on reaping
1201 struct timeval waitfor = {4, 0};
1202 int sock = PL_dumper_fd;
1206 FD_SET(sock, &rset);
1207 select(sock + 1, &rset, NULL, NULL, &waitfor);
1208 waitpid(child, &status, WNOHANG);
1213 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1219 #ifdef PERL_DEBUG_READONLY_OPS
1225 #if defined(PERLIO_LAYERS)
1226 /* No more IO - including error messages ! */
1227 PerlIO_cleanup(aTHX);
1230 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1231 as currently layers use it rather than NULL as a marker
1232 for no arg - and will try and SvREFCNT_dec it.
1234 SvREFCNT(&PL_sv_undef) = 0;
1235 SvREADONLY_off(&PL_sv_undef);
1237 Safefree(PL_origfilename);
1238 PL_origfilename = NULL;
1239 Safefree(PL_reg_start_tmp);
1240 PL_reg_start_tmp = (char**)NULL;
1241 PL_reg_start_tmpl = 0;
1242 Safefree(PL_reg_curpm);
1243 Safefree(PL_reg_poscache);
1244 free_tied_hv_pool();
1245 Safefree(PL_op_mask);
1246 Safefree(PL_psig_name);
1247 PL_psig_name = (SV**)NULL;
1248 PL_psig_ptr = (SV**)NULL;
1249 Safefree(PL_psig_pend);
1250 PL_psig_pend = (int*)NULL;
1252 /* We need to NULL PL_psig_pend first, so that
1253 signal handlers know not to use it */
1254 int *psig_save = PL_psig_pend;
1255 PL_psig_pend = (int*)NULL;
1256 Safefree(psig_save);
1260 PL_tainting = FALSE;
1261 PL_taint_warn = FALSE;
1262 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1265 DEBUG_P(debprofdump());
1267 #ifdef USE_REENTRANT_API
1268 Perl_reentrant_free(aTHX);
1273 while (PL_regmatch_slab) {
1274 regmatch_slab *s = PL_regmatch_slab;
1275 PL_regmatch_slab = PL_regmatch_slab->next;
1279 /* As the absolutely last thing, free the non-arena SV for mess() */
1282 /* we know that type == SVt_PVMG */
1284 /* it could have accumulated taint magic */
1287 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1288 moremagic = mg->mg_moremagic;
1289 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1291 Safefree(mg->mg_ptr);
1295 /* we know that type >= SVt_PV */
1296 SvPV_free(PL_mess_sv);
1297 Safefree(SvANY(PL_mess_sv));
1298 Safefree(PL_mess_sv);
1305 =for apidoc perl_free
1307 Releases a Perl interpreter. See L<perlembed>.
1317 PERL_ARGS_ASSERT_PERL_FREE;
1319 if (PL_veto_cleanup)
1322 #ifdef PERL_TRACK_MEMPOOL
1325 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1326 * value as we're probably hunting memory leaks then
1328 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1329 if (!s || atoi(s) == 0) {
1330 const U32 old_debug = PL_debug;
1331 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1332 thread at thread exit. */
1334 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1335 "free this thread's memory\n");
1336 PL_debug &= ~ DEBUG_m_FLAG;
1338 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1339 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1340 PL_debug = old_debug;
1345 #if defined(WIN32) || defined(NETWARE)
1346 # if defined(PERL_IMPLICIT_SYS)
1349 void *host = nw_internal_host;
1351 void *host = w32_internal_host;
1353 PerlMem_free(aTHXx);
1355 nw_delete_internal_host(host);
1357 win32_delete_internal_host(host);
1361 PerlMem_free(aTHXx);
1364 PerlMem_free(aTHXx);
1368 #if defined(USE_ITHREADS)
1369 /* provide destructors to clean up the thread key when libperl is unloaded */
1370 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1372 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1373 #pragma fini "perl_fini"
1374 #elif defined(__sun) && !defined(__GNUC__)
1375 #pragma fini (perl_fini)
1379 #if defined(__GNUC__)
1380 __attribute__((destructor))
1385 if (PL_curinterp && !PL_veto_cleanup)
1390 #endif /* THREADS */
1393 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1396 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1397 PL_exitlist[PL_exitlistlen].fn = fn;
1398 PL_exitlist[PL_exitlistlen].ptr = ptr;
1402 #ifdef HAS_PROCSELFEXE
1403 /* This is a function so that we don't hold on to MAXPATHLEN
1404 bytes of stack longer than necessary
1407 S_procself_val(pTHX_ SV *sv, const char *arg0)
1409 char buf[MAXPATHLEN];
1410 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1412 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1413 includes a spurious NUL which will cause $^X to fail in system
1414 or backticks (this will prevent extensions from being built and
1415 many tests from working). readlink is not meant to add a NUL.
1416 Normal readlink works fine.
1418 if (len > 0 && buf[len-1] == '\0') {
1422 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1423 returning the text "unknown" from the readlink rather than the path
1424 to the executable (or returning an error from the readlink). Any valid
1425 path has a '/' in it somewhere, so use that to validate the result.
1426 See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1428 if (len > 0 && memchr(buf, '/', len)) {
1429 sv_setpvn(sv,buf,len);
1435 #endif /* HAS_PROCSELFEXE */
1438 S_set_caret_X(pTHX) {
1440 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1442 #ifdef HAS_PROCSELFEXE
1443 S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]);
1446 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX));
1448 sv_setpv(GvSVn(tmpgv),PL_origargv[0]);
1455 =for apidoc perl_parse
1457 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1463 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1470 PERL_ARGS_ASSERT_PERL_PARSE;
1471 #ifndef MULTIPLICITY
1472 PERL_UNUSED_ARG(my_perl);
1475 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1476 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1477 * This MUST be done before any hash stores or fetches take place.
1478 * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set)
1479 * yourself, it is your responsibility to provide a good random seed!
1480 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1481 if (!PL_rehash_seed_set)
1482 PL_rehash_seed = get_hash_seed();
1484 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1486 if (s && (atoi(s) == 1))
1487 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1489 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1494 if (PL_origalen != 0) {
1495 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1498 /* Set PL_origalen be the sum of the contiguous argv[]
1499 * elements plus the size of the env in case that it is
1500 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1501 * as the maximum modifiable length of $0. In the worst case
1502 * the area we are able to modify is limited to the size of
1503 * the original argv[0]. (See below for 'contiguous', though.)
1505 const char *s = NULL;
1508 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1509 /* Do the mask check only if the args seem like aligned. */
1511 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1513 /* See if all the arguments are contiguous in memory. Note
1514 * that 'contiguous' is a loose term because some platforms
1515 * align the argv[] and the envp[]. If the arguments look
1516 * like non-aligned, assume that they are 'strictly' or
1517 * 'traditionally' contiguous. If the arguments look like
1518 * aligned, we just check that they are within aligned
1519 * PTRSIZE bytes. As long as no system has something bizarre
1520 * like the argv[] interleaved with some other data, we are
1521 * fine. (Did I just evoke Murphy's Law?) --jhi */
1522 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1524 for (i = 1; i < PL_origargc; i++) {
1525 if ((PL_origargv[i] == s + 1
1527 || PL_origargv[i] == s + 2
1532 (PL_origargv[i] > s &&
1534 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1545 #ifndef PERL_USE_SAFE_PUTENV
1546 /* Can we grab env area too to be used as the area for $0? */
1547 if (s && PL_origenviron && !PL_use_safe_putenv) {
1548 if ((PL_origenviron[0] == s + 1)
1551 (PL_origenviron[0] > s &&
1552 PL_origenviron[0] <=
1553 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1556 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1557 s = PL_origenviron[0];
1560 my_setenv("NoNe SuCh", NULL);
1561 /* Force copy of environment. */
1562 for (i = 1; PL_origenviron[i]; i++) {
1563 if (PL_origenviron[i] == s + 1
1566 (PL_origenviron[i] > s &&
1567 PL_origenviron[i] <=
1568 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1571 s = PL_origenviron[i];
1579 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1581 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1586 /* Come here if running an undumped a.out. */
1588 PL_origfilename = savepv(argv[0]);
1589 PL_do_undump = FALSE;
1590 cxstack_ix = -1; /* start label stack again */
1592 assert (!PL_tainted);
1594 S_set_caret_X(aTHX);
1596 init_postdump_symbols(argc,argv,env);
1601 op_free(PL_main_root);
1602 PL_main_root = NULL;
1604 PL_main_start = NULL;
1605 SvREFCNT_dec(PL_main_cv);
1609 oldscope = PL_scopestack_ix;
1610 PL_dowarn = G_WARN_OFF;
1615 parse_body(env,xsinit);
1617 call_list(oldscope, PL_unitcheckav);
1619 call_list(oldscope, PL_checkav);
1626 /* my_exit() was called */
1627 while (PL_scopestack_ix > oldscope)
1630 PL_curstash = PL_defstash;
1632 call_list(oldscope, PL_unitcheckav);
1634 call_list(oldscope, PL_checkav);
1638 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1646 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1647 miniperl, and we need to see those flags reflected in the values here. */
1649 /* What this returns is subject to change. Use the public interface in Config.
1652 S_Internals_V(pTHX_ CV *cv)
1655 #ifdef LOCAL_PATCH_COUNT
1656 const int local_patch_count = LOCAL_PATCH_COUNT;
1658 const int local_patch_count = 0;
1660 const int entries = 3 + local_patch_count;
1662 static char non_bincompat_options[] =
1669 # ifdef PERL_DISABLE_PMC
1672 # ifdef PERL_DONT_CREATE_GVSV
1673 " PERL_DONT_CREATE_GVSV"
1675 # ifdef PERL_EXTERNAL_GLOB
1676 " PERL_EXTERNAL_GLOB"
1678 # ifdef PERL_IS_MINIPERL
1681 # ifdef PERL_MALLOC_WRAP
1684 # ifdef PERL_MEM_LOG
1687 # ifdef PERL_MEM_LOG_NOIMPL
1688 " PERL_MEM_LOG_NOIMPL"
1690 # ifdef PERL_USE_DEVEL
1693 # ifdef PERL_USE_SAFE_PUTENV
1694 " PERL_USE_SAFE_PUTENV"
1696 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1697 " USE_ATTRIBUTES_FOR_PERLIO"
1699 # ifdef USE_FAST_STDIO
1702 # ifdef USE_PERL_ATOF
1705 # ifdef USE_SITECUSTOMIZE
1706 " USE_SITECUSTOMIZE"
1709 PERL_UNUSED_ARG(cv);
1710 PERL_UNUSED_ARG(items);
1712 EXTEND(SP, entries);
1714 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1715 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1716 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1720 PUSHs(Perl_newSVpvn_flags(aTHX_
1721 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1724 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1728 PUSHs(&PL_sv_undef);
1731 for (i = 1; i <= local_patch_count; i++) {
1732 /* This will be an undef, if PL_localpatches[i] is NULL. */
1733 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1739 #define INCPUSH_UNSHIFT 0x01
1740 #define INCPUSH_ADD_OLD_VERS 0x02
1741 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1742 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1743 #define INCPUSH_NOT_BASEDIR 0x10
1744 #define INCPUSH_CAN_RELOCATE 0x20
1745 #define INCPUSH_ADD_SUB_DIRS \
1746 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1749 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1753 int argc = PL_origargc;
1754 char **argv = PL_origargv;
1755 const char *scriptname = NULL;
1756 VOL bool dosearch = FALSE;
1758 const char *cddir = NULL;
1759 #ifdef USE_SITECUSTOMIZE
1760 bool minus_f = FALSE;
1762 SV *linestr_sv = newSV_type(SVt_PVIV);
1763 bool add_read_e_script = FALSE;
1765 SvGROW(linestr_sv, 80);
1766 sv_setpvs(linestr_sv,"");
1772 for (argc--,argv++; argc > 0; argc--,argv++) {
1773 if (argv[0][0] != '-' || !argv[0][1])
1779 #ifndef PERL_STRICT_CR
1803 if ((s = moreswitches(s)))
1808 CHECK_MALLOC_TOO_LATE_FOR('t');
1809 if( !PL_tainting ) {
1810 PL_taint_warn = TRUE;
1816 CHECK_MALLOC_TOO_LATE_FOR('T');
1818 PL_taint_warn = FALSE;
1826 forbid_setid('e', FALSE);
1828 PL_e_script = newSVpvs("");
1829 add_read_e_script = TRUE;
1832 sv_catpv(PL_e_script, s);
1834 sv_catpv(PL_e_script, argv[1]);
1838 Perl_croak(aTHX_ "No code specified for -%c", c);
1839 sv_catpvs(PL_e_script, "\n");
1843 #ifdef USE_SITECUSTOMIZE
1849 case 'I': /* -I handled both here and in moreswitches() */
1850 forbid_setid('I', FALSE);
1851 if (!*++s && (s=argv[1]) != NULL) {
1855 STRLEN len = strlen(s);
1856 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1859 Perl_croak(aTHX_ "No directory specified for -I");
1862 forbid_setid('S', FALSE);
1871 opts_prog = newSVpvs("use Config; Config::_V()");
1875 opts_prog = Perl_newSVpvf(aTHX_
1876 "use Config; Config::config_vars(qw%c%s%c)",
1880 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1881 /* don't look for script or read stdin */
1882 scriptname = BIT_BUCKET;
1886 PL_doextract = TRUE;
1894 if (!*++s || isSPACE(*s)) {
1898 /* catch use of gnu style long options */
1899 if (strEQ(s, "version")) {
1903 if (strEQ(s, "help")) {
1910 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1921 #ifndef SECURE_INTERNAL_GETENV
1924 (s = PerlEnv_getenv("PERL5OPT")))
1928 if (*s == '-' && *(s+1) == 'T') {
1929 CHECK_MALLOC_TOO_LATE_FOR('T');
1931 PL_taint_warn = FALSE;
1934 char *popt_copy = NULL;
1947 if (!strchr("CDIMUdmtwW", *s))
1948 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1952 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1953 s = popt_copy + (s - d);
1961 if( !PL_tainting ) {
1962 PL_taint_warn = TRUE;
1973 #if defined(USE_SITECUSTOMIZE) && !defined(PERL_IS_MINIPERL)
1975 /* SITELIB_EXP is a function call on Win32.
1976 The games with local $! are to avoid setting errno if there is no
1977 sitecustomize script. */
1978 const char *const sitelib = SITELIB_EXP;
1979 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
1981 "BEGIN { do {local $!; -f '%s/sitecustomize.pl'} && do '%s/sitecustomize.pl' }", sitelib, sitelib));
1986 scriptname = argv[0];
1989 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
1991 else if (scriptname == NULL) {
1993 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
1999 /* Set $^X early so that it can be used for relocatable paths in @INC */
2000 assert (!PL_tainted);
2002 S_set_caret_X(aTHX);
2007 bool suidscript = FALSE;
2009 open_script(scriptname, dosearch, &suidscript, &rsfp);
2011 validate_suid(validarg, scriptname, fdscript, suidscript,
2015 # if defined(SIGCHLD) || defined(SIGCLD)
2018 # define SIGCHLD SIGCLD
2020 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2021 if (sigstate == (Sighandler_t) SIG_IGN) {
2022 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2023 "Can't ignore signal CHLD, forcing to default");
2024 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2032 /* This will croak if suidscript is true, as -x cannot be used with
2034 forbid_setid('x', suidscript);
2035 /* Hence you can't get here if suidscript is true */
2037 find_beginning(linestr_sv, rsfp);
2038 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2039 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2043 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2044 CvUNIQUE_on(PL_compcv);
2046 CvPADLIST(PL_compcv) = pad_new(0);
2048 PL_isarev = newHV();
2051 boot_core_UNIVERSAL();
2053 newXS("Internals::V", S_Internals_V, __FILE__);
2056 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2058 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2064 # ifdef HAS_SOCKS5_INIT
2065 socks5_init(argv[0]);
2071 init_predump_symbols();
2072 /* init_postdump_symbols not currently designed to be called */
2073 /* more than once (ENV isn't cleared first, for example) */
2074 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2076 init_postdump_symbols(argc,argv,env);
2078 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2079 * or explicitly in some platforms.
2080 * locale.c:Perl_init_i18nl10n() if the environment
2081 * look like the user wants to use UTF-8. */
2082 #if defined(__SYMBIAN32__)
2083 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2085 # ifndef PERL_IS_MINIPERL
2087 /* Requires init_predump_symbols(). */
2088 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2093 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2094 * and the default open disciplines. */
2095 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2096 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2098 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2099 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2100 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2102 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2103 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2104 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2106 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2107 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2108 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2110 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2111 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2114 sv_setpvs(sv, ":utf8\0:utf8");
2116 sv_setpvs(sv, ":utf8\0");
2119 sv_setpvs(sv, "\0:utf8");
2128 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2129 if (strEQ(s, "unsafe"))
2130 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2131 else if (strEQ(s, "safe"))
2132 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2134 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2141 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2145 PL_xmlfp = PerlIO_stdout();
2147 PL_xmlfp = PerlIO_open(s, "w");
2149 Perl_croak(aTHX_ "Can't open %s", s);
2151 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2157 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2158 PL_madskills = atoi(s);
2159 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2164 lex_start(linestr_sv, rsfp, TRUE);
2165 PL_subname = newSVpvs("main");
2167 if (add_read_e_script)
2168 filter_add(read_e_script, NULL);
2170 /* now parse the script */
2172 SETERRNO(0,SS_NORMAL);
2173 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2175 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2177 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2181 CopLINE_set(PL_curcop, 0);
2182 PL_curstash = PL_defstash;
2184 SvREFCNT_dec(PL_e_script);
2192 SAVECOPFILE(PL_curcop);
2193 SAVECOPLINE(PL_curcop);
2194 gv_check(PL_defstash);
2203 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2204 dump_mstats("after compilation:");
2209 PL_restartjmpenv = NULL;
2215 =for apidoc perl_run
2217 Tells a Perl interpreter to run. See L<perlembed>.
2230 PERL_ARGS_ASSERT_PERL_RUN;
2231 #ifndef MULTIPLICITY
2232 PERL_UNUSED_ARG(my_perl);
2235 oldscope = PL_scopestack_ix;
2243 cxstack_ix = -1; /* start context stack again */
2245 case 0: /* normal completion */
2249 case 2: /* my_exit() */
2250 while (PL_scopestack_ix > oldscope)
2253 PL_curstash = PL_defstash;
2254 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2255 PL_endav && !PL_minus_c)
2256 call_list(oldscope, PL_endav);
2258 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2259 dump_mstats("after execution: ");
2265 POPSTACK_TO(PL_mainstack);
2268 PerlIO_printf(Perl_error_log, "panic: restartop\n");
2279 S_run_body(pTHX_ I32 oldscope)
2282 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2283 PL_sawampersand ? "Enabling" : "Omitting"));
2285 if (!PL_restartop) {
2289 exit(0); /* less likely to core dump than my_exit(0) */
2293 if (DEBUG_x_TEST || DEBUG_B_TEST)
2294 dump_all_perl(!DEBUG_B_TEST);
2296 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2300 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2303 if (PERLDB_SINGLE && PL_DBsingle)
2304 sv_setiv(PL_DBsingle, 1);
2306 call_list(oldscope, PL_initav);
2307 #ifdef PERL_DEBUG_READONLY_OPS
2308 Perl_pending_Slabs_to_ro(aTHX);
2315 PL_restartjmpenv = NULL;
2316 PL_op = PL_restartop;
2320 else if (PL_main_start) {
2321 CvDEPTH(PL_main_cv) = 1;
2322 PL_op = PL_main_start;
2330 =head1 SV Manipulation Functions
2332 =for apidoc p||get_sv
2334 Returns the SV of the specified Perl scalar. C<flags> are passed to
2335 C<gv_fetchpv>. If C<GV_ADD> is set and the
2336 Perl variable does not exist then it will be created. If C<flags> is zero
2337 and the variable does not exist then NULL is returned.
2343 Perl_get_sv(pTHX_ const char *name, I32 flags)
2347 PERL_ARGS_ASSERT_GET_SV;
2349 gv = gv_fetchpv(name, flags, SVt_PV);
2356 =head1 Array Manipulation Functions
2358 =for apidoc p||get_av
2360 Returns the AV of the specified Perl array. C<flags> are passed to
2361 C<gv_fetchpv>. If C<GV_ADD> is set and the
2362 Perl variable does not exist then it will be created. If C<flags> is zero
2363 and the variable does not exist then NULL is returned.
2369 Perl_get_av(pTHX_ const char *name, I32 flags)
2371 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2373 PERL_ARGS_ASSERT_GET_AV;
2383 =head1 Hash Manipulation Functions
2385 =for apidoc p||get_hv
2387 Returns the HV of the specified Perl hash. C<flags> are passed to
2388 C<gv_fetchpv>. If C<GV_ADD> is set and the
2389 Perl variable does not exist then it will be created. If C<flags> is zero
2390 and the variable does not exist then NULL is returned.
2396 Perl_get_hv(pTHX_ const char *name, I32 flags)
2398 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2400 PERL_ARGS_ASSERT_GET_HV;
2410 =head1 CV Manipulation Functions
2412 =for apidoc p||get_cvn_flags
2414 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2415 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2416 exist then it will be declared (which has the same effect as saying
2417 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2418 then NULL is returned.
2420 =for apidoc p||get_cv
2422 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2428 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2430 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2431 /* XXX this is probably not what they think they're getting.
2432 * It has the same effect as "sub name;", i.e. just a forward
2435 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2437 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2438 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2439 return newSUB(start_subparse(FALSE, 0),
2440 newSVOP(OP_CONST, 0, sv),
2448 /* Nothing in core calls this now, but we can't replace it with a macro and
2449 move it to mathoms.c as a macro would evaluate name twice. */
2451 Perl_get_cv(pTHX_ const char *name, I32 flags)
2453 PERL_ARGS_ASSERT_GET_CV;
2455 return get_cvn_flags(name, strlen(name), flags);
2458 /* Be sure to refetch the stack pointer after calling these routines. */
2462 =head1 Callback Functions
2464 =for apidoc p||call_argv
2466 Performs a callback to the specified Perl sub. See L<perlcall>.
2472 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2474 /* See G_* flags in cop.h */
2475 /* null terminated arg list */
2480 PERL_ARGS_ASSERT_CALL_ARGV;
2485 mXPUSHs(newSVpv(*argv,0));
2490 return call_pv(sub_name, flags);
2494 =for apidoc p||call_pv
2496 Performs a callback to the specified Perl sub. See L<perlcall>.
2502 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2503 /* name of the subroutine */
2504 /* See G_* flags in cop.h */
2506 PERL_ARGS_ASSERT_CALL_PV;
2508 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2512 =for apidoc p||call_method
2514 Performs a callback to the specified Perl method. The blessed object must
2515 be on the stack. See L<perlcall>.
2521 Perl_call_method(pTHX_ const char *methname, I32 flags)
2522 /* name of the subroutine */
2523 /* See G_* flags in cop.h */
2526 PERL_ARGS_ASSERT_CALL_METHOD;
2528 len = strlen(methname);
2530 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2531 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2534 /* May be called with any of a CV, a GV, or an SV containing the name. */
2536 =for apidoc p||call_sv
2538 Performs a callback to the Perl sub whose name is in the SV. See
2545 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2546 /* See G_* flags in cop.h */
2549 LOGOP myop; /* fake syntax tree node */
2554 bool oldcatch = CATCH_GET;
2556 OP* const oldop = PL_op;
2559 PERL_ARGS_ASSERT_CALL_SV;
2561 if (flags & G_DISCARD) {
2565 if (!(flags & G_WANT)) {
2566 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2571 Zero(&myop, 1, LOGOP);
2572 myop.op_next = NULL;
2573 if (!(flags & G_NOARGS))
2574 myop.op_flags |= OPf_STACKED;
2575 myop.op_flags |= OP_GIMME_REVERSE(flags);
2579 EXTEND(PL_stack_sp, 1);
2580 *++PL_stack_sp = sv;
2582 oldscope = PL_scopestack_ix;
2584 if (PERLDB_SUB && PL_curstash != PL_debstash
2585 /* Handle first BEGIN of -d. */
2586 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2587 /* Try harder, since this may have been a sighandler, thus
2588 * curstash may be meaningless. */
2589 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2590 && !(flags & G_NODEBUG))
2591 PL_op->op_private |= OPpENTERSUB_DB;
2593 if (flags & G_METHOD) {
2594 Zero(&method_op, 1, UNOP);
2595 method_op.op_next = PL_op;
2596 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2597 method_op.op_type = OP_METHOD;
2598 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2599 myop.op_type = OP_ENTERSUB;
2600 PL_op = (OP*)&method_op;
2603 if (!(flags & G_EVAL)) {
2605 CALL_BODY_SUB((OP*)&myop);
2606 retval = PL_stack_sp - (PL_stack_base + oldmark);
2607 CATCH_SET(oldcatch);
2610 myop.op_other = (OP*)&myop;
2612 create_eval_scope(flags|G_FAKINGEVAL);
2620 CALL_BODY_SUB((OP*)&myop);
2621 retval = PL_stack_sp - (PL_stack_base + oldmark);
2622 if (!(flags & G_KEEPERR)) {
2630 /* my_exit() was called */
2631 PL_curstash = PL_defstash;
2638 PL_restartjmpenv = NULL;
2639 PL_op = PL_restartop;
2643 PL_stack_sp = PL_stack_base + oldmark;
2644 if ((flags & G_WANT) == G_ARRAY)
2648 *++PL_stack_sp = &PL_sv_undef;
2653 if (PL_scopestack_ix > oldscope)
2654 delete_eval_scope();
2658 if (flags & G_DISCARD) {
2659 PL_stack_sp = PL_stack_base + oldmark;
2668 /* Eval a string. The G_EVAL flag is always assumed. */
2671 =for apidoc p||eval_sv
2673 Tells Perl to C<eval> the string in the SV.
2679 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2681 /* See G_* flags in cop.h */
2685 UNOP myop; /* fake syntax tree node */
2686 VOL I32 oldmark = SP - PL_stack_base;
2689 OP* const oldop = PL_op;
2692 PERL_ARGS_ASSERT_EVAL_SV;
2694 if (flags & G_DISCARD) {
2701 Zero(PL_op, 1, UNOP);
2702 EXTEND(PL_stack_sp, 1);
2703 *++PL_stack_sp = sv;
2705 if (!(flags & G_NOARGS))
2706 myop.op_flags = OPf_STACKED;
2707 myop.op_next = NULL;
2708 myop.op_type = OP_ENTEREVAL;
2709 myop.op_flags |= OP_GIMME_REVERSE(flags);
2710 if (flags & G_KEEPERR)
2711 myop.op_flags |= OPf_SPECIAL;
2713 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2714 * before a PUSHEVAL, which corrupts the stack after a croak */
2715 TAINT_PROPER("eval_sv()");
2721 CALL_BODY_EVAL((OP*)&myop);
2722 retval = PL_stack_sp - (PL_stack_base + oldmark);
2723 if (!(flags & G_KEEPERR)) {
2731 /* my_exit() was called */
2732 PL_curstash = PL_defstash;
2739 PL_restartjmpenv = NULL;
2740 PL_op = PL_restartop;
2744 PL_stack_sp = PL_stack_base + oldmark;
2745 if ((flags & G_WANT) == G_ARRAY)
2749 *++PL_stack_sp = &PL_sv_undef;
2755 if (flags & G_DISCARD) {
2756 PL_stack_sp = PL_stack_base + oldmark;
2766 =for apidoc p||eval_pv
2768 Tells Perl to C<eval> the given string and return an SV* result.
2774 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2778 SV* sv = newSVpv(p, 0);
2780 PERL_ARGS_ASSERT_EVAL_PV;
2782 eval_sv(sv, G_SCALAR);
2789 if (croak_on_error && SvTRUE(ERRSV)) {
2790 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2796 /* Require a module. */
2799 =head1 Embedding Functions
2801 =for apidoc p||require_pv
2803 Tells Perl to C<require> the file named by the string argument. It is
2804 analogous to the Perl code C<eval "require '$file'">. It's even
2805 implemented that way; consider using load_module instead.
2810 Perl_require_pv(pTHX_ const char *pv)
2816 PERL_ARGS_ASSERT_REQUIRE_PV;
2818 PUSHSTACKi(PERLSI_REQUIRE);
2820 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2821 eval_sv(sv_2mortal(sv), G_DISCARD);
2827 S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */
2829 /* This message really ought to be max 23 lines.
2830 * Removed -h because the user already knows that option. Others? */
2832 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2833 minimum of 509 character string literals. */
2834 static const char * const usage_msg[] = {
2835 " -0[octal] specify record separator (\\0, if no argument)\n"
2836 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2837 " -C[number/list] enables the listed Unicode features\n"
2838 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2839 " -d[:debugger] run program under debugger\n"
2840 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2841 " -e program one line of program (several -e's allowed, omit programfile)\n"
2842 " -E program like -e, but enables all optional features\n"
2843 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2844 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2845 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2846 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2847 " -l[octal] enable line ending processing, specifies line terminator\n"
2848 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2849 " -n assume \"while (<>) { ... }\" loop around program\n"
2850 " -p assume loop like -n but print line also, like sed\n"
2851 " -s enable rudimentary parsing for switches after programfile\n"
2852 " -S look for programfile using PATH environment variable\n",
2853 " -t enable tainting warnings\n"
2854 " -T enable tainting checks\n"
2855 " -u dump core after parsing program\n"
2856 " -U allow unsafe operations\n"
2857 " -v print version, patchlevel and license\n"
2858 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2859 " -w enable many useful warnings\n"
2860 " -W enable all warnings\n"
2861 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2862 " -X disable all warnings\n"
2864 "Run 'perldoc perl' for more help with Perl.\n\n",
2867 const char * const *p = usage_msg;
2868 PerlIO *out = PerlIO_stdout();
2870 PERL_ARGS_ASSERT_USAGE;
2873 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2876 PerlIO_puts(out, *p++);
2879 /* convert a string of -D options (or digits) into an int.
2880 * sets *s to point to the char after the options */
2884 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2886 static const char * const usage_msgd[] = {
2887 " Debugging flag values: (see also -d)\n"
2888 " p Tokenizing and parsing (with v, displays parse stack)\n"
2889 " s Stack snapshots (with v, displays all stacks)\n"
2890 " l Context (loop) stack processing\n"
2891 " t Trace execution\n"
2892 " o Method and overloading resolution\n",
2893 " c String/numeric conversions\n"
2894 " P Print profiling info, source file input state\n"
2895 " m Memory and SV allocation\n"
2896 " f Format processing\n"
2897 " r Regular expression parsing and execution\n"
2898 " x Syntax tree dump\n",
2899 " u Tainting checks\n"
2900 " H Hash dump -- usurps values()\n"
2901 " X Scratchpad allocation\n"
2904 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2905 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2906 " v Verbose: use in conjunction with other flags\n"
2907 " C Copy On Write\n"
2908 " A Consistency checks on internal structures\n"
2909 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2910 " M trace smart match resolution\n"
2911 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
2916 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
2919 /* if adding extra options, remember to update DEBUG_MASK */
2920 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
2922 for (; isALNUM(**s); (*s)++) {
2923 const char * const d = strchr(debopts,**s);
2925 i |= 1 << (d - debopts);
2926 else if (ckWARN_d(WARN_DEBUGGING))
2927 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2928 "invalid option -D%c, use -D'' to see choices\n", **s);
2931 else if (isDIGIT(**s)) {
2933 for (; isALNUM(**s); (*s)++) ;
2935 else if (givehelp) {
2936 const char *const *p = usage_msgd;
2937 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
2940 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
2941 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
2942 "-Dp not implemented on this platform\n");
2948 /* This routine handles any switches that can be given during run */
2951 Perl_moreswitches(pTHX_ const char *s)
2955 const char option = *s; /* used to remember option in -m/-M code */
2957 PERL_ARGS_ASSERT_MORESWITCHES;
2965 SvREFCNT_dec(PL_rs);
2966 if (s[1] == 'x' && s[2]) {
2967 const char *e = s+=2;
2973 flags = PERL_SCAN_SILENT_ILLDIGIT;
2974 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
2975 if (s + numlen < e) {
2976 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
2980 PL_rs = newSVpvs("");
2981 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
2982 tmps = (U8*)SvPVX(PL_rs);
2983 uvchr_to_utf8(tmps, rschar);
2984 SvCUR_set(PL_rs, UNISKIP(rschar));
2989 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
2990 if (rschar & ~((U8)~0))
2991 PL_rs = &PL_sv_undef;
2992 else if (!rschar && numlen >= 2)
2993 PL_rs = newSVpvs("");
2995 char ch = (char)rschar;
2996 PL_rs = newSVpvn(&ch, 1);
2999 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3004 PL_unicode = parse_unicode_opts( (const char **)&s );
3005 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3011 while (*s && !isSPACE(*s)) ++s;
3012 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3023 forbid_setid('d', FALSE);
3026 /* -dt indicates to the debugger that threads will be used */
3027 if (*s == 't' && !isALNUM(s[1])) {
3029 my_setenv("PERL5DB_THREADED", "1");
3032 /* The following permits -d:Mod to accepts arguments following an =
3033 in the fashion that -MSome::Mod does. */
3034 if (*s == ':' || *s == '=') {
3035 const char *start = ++s;
3036 const char *const end = s + strlen(s);
3037 SV * const sv = newSVpvs("use Devel::");
3039 /* We now allow -d:Module=Foo,Bar */
3040 while(isALNUM(*s) || *s==':') ++s;
3042 sv_catpvn(sv, start, end - start);
3044 sv_catpvn(sv, start, s-start);
3045 /* Don't use NUL as q// delimiter here, this string goes in the
3047 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3050 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3054 PL_perldb = PERLDB_ALL;
3061 forbid_setid('D', FALSE);
3063 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3064 #else /* !DEBUGGING */
3065 if (ckWARN_d(WARN_DEBUGGING))
3066 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3067 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3068 for (s++; isALNUM(*s); s++) ;
3073 usage(PL_origargv[0]);
3076 Safefree(PL_inplace);
3077 #if defined(__CYGWIN__) /* do backup extension automagically */
3078 if (*(s+1) == '\0') {
3079 PL_inplace = savepvs(".bak");
3082 #endif /* __CYGWIN__ */
3084 const char * const start = ++s;
3085 while (*s && !isSPACE(*s))
3088 PL_inplace = savepvn(start, s - start);
3092 if (*s == '-') /* Additional switches on #! line. */
3096 case 'I': /* -I handled both here and in parse_body() */
3097 forbid_setid('I', FALSE);
3099 while (*s && isSPACE(*s))
3104 /* ignore trailing spaces (possibly followed by other switches) */
3106 for (e = p; *e && !isSPACE(*e); e++) ;
3110 } while (*p && *p != '-');
3112 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3118 Perl_croak(aTHX_ "No directory specified for -I");
3124 SvREFCNT_dec(PL_ors_sv);
3130 PL_ors_sv = newSVpvs("\n");
3131 numlen = 3 + (*s == '0');
3132 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3136 if (RsPARA(PL_rs)) {
3137 PL_ors_sv = newSVpvs("\n\n");
3140 PL_ors_sv = newSVsv(PL_rs);
3145 forbid_setid('M', FALSE); /* XXX ? */
3148 forbid_setid('m', FALSE); /* XXX ? */
3153 const char *use = "use ";
3155 /* -M-foo == 'no foo' */
3156 /* Leading space on " no " is deliberate, to make both
3157 possibilities the same length. */
3158 if (*s == '-') { use = " no "; ++s; }
3159 sv = newSVpvn(use,4);
3161 /* We allow -M'Module qw(Foo Bar)' */
3162 while(isALNUM(*s) || *s==':') {
3171 Perl_croak(aTHX_ "Module name required with -%c option",
3174 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3175 "contains single ':'",
3176 (int)(s - start), start, option);
3177 end = s + strlen(s);
3179 sv_catpvn(sv, start, end - start);
3180 if (option == 'm') {
3182 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3183 sv_catpvs( sv, " ()");
3186 sv_catpvn(sv, start, s-start);
3187 /* Use NUL as q''-delimiter. */
3188 sv_catpvs(sv, " split(/,/,q\0");
3190 sv_catpvn(sv, s, end - s);
3191 sv_catpvs(sv, "\0)");
3194 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3197 Perl_croak(aTHX_ "Missing argument to -%c", option);
3208 forbid_setid('s', FALSE);
3209 PL_doswitches = TRUE;
3223 PL_do_undump = TRUE;
3231 if (!sv_derived_from(PL_patchlevel, "version"))
3232 upg_version(PL_patchlevel, TRUE);
3235 SV* level= vstringify(PL_patchlevel);
3236 #ifdef PERL_PATCHNUM
3237 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3238 SV *num = newSVpvs(PERL_PATCHNUM "*");
3240 SV *num = newSVpvs(PERL_PATCHNUM);
3243 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3244 SvREFCNT_dec(level);
3247 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3251 PerlIO_printf(PerlIO_stdout(),
3252 "\nThis is perl " STRINGIFY(PERL_REVISION)
3253 ", version " STRINGIFY(PERL_VERSION)
3254 ", subversion " STRINGIFY(PERL_SUBVERSION)
3255 " (%"SVf") built for " ARCHNAME, level
3257 SvREFCNT_dec(level);
3260 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3261 PerlIO_printf(PerlIO_stdout(),
3262 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3263 SVfARG(vstringify(PL_patchlevel))));
3264 PerlIO_printf(PerlIO_stdout(),
3265 Perl_form(aTHX_ " built under %s at %s %s\n",
3266 OSNAME, __DATE__, __TIME__));
3267 PerlIO_printf(PerlIO_stdout(),
3268 Perl_form(aTHX_ " OS Specific Release: %s\n",
3271 #if defined(LOCAL_PATCH_COUNT)
3272 if (LOCAL_PATCH_COUNT > 0)
3273 PerlIO_printf(PerlIO_stdout(),
3274 "\n(with %d registered patch%s, "
3275 "see perl -V for more detail)",
3277 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3280 PerlIO_printf(PerlIO_stdout(),
3281 "\n\nCopyright 1987-2010, Larry Wall\n");
3283 PerlIO_printf(PerlIO_stdout(),
3284 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3287 PerlIO_printf(PerlIO_stdout(),
3288 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3289 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3292 PerlIO_printf(PerlIO_stdout(),
3293 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3294 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3297 PerlIO_printf(PerlIO_stdout(),
3298 "atariST series port, ++jrb bammi@cadence.com\n");
3301 PerlIO_printf(PerlIO_stdout(),
3302 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3305 PerlIO_printf(PerlIO_stdout(),
3306 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3309 PerlIO_printf(PerlIO_stdout(),
3310 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3313 PerlIO_printf(PerlIO_stdout(),
3314 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3317 PerlIO_printf(PerlIO_stdout(),
3318 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3321 PerlIO_printf(PerlIO_stdout(),
3322 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3325 PerlIO_printf(PerlIO_stdout(),
3326 "EPOC port by Olaf Flebbe, 1999-2002\n");
3329 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3330 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3333 #ifdef __SYMBIAN32__
3334 PerlIO_printf(PerlIO_stdout(),
3335 "Symbian port by Nokia, 2004-2005\n");
3337 #ifdef BINARY_BUILD_NOTICE
3338 BINARY_BUILD_NOTICE;
3340 PerlIO_printf(PerlIO_stdout(),
3342 Perl may be copied only under the terms of either the Artistic License or the\n\
3343 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3344 Complete documentation for Perl, including FAQ lists, should be found on\n\
3345 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3346 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3349 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3350 PL_dowarn |= G_WARN_ON;
3355 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3356 if (!specialWARN(PL_compiling.cop_warnings))
3357 PerlMemShared_free(PL_compiling.cop_warnings);
3358 PL_compiling.cop_warnings = pWARN_ALL ;
3362 PL_dowarn = G_WARN_ALL_OFF;
3363 if (!specialWARN(PL_compiling.cop_warnings))
3364 PerlMemShared_free(PL_compiling.cop_warnings);
3365 PL_compiling.cop_warnings = pWARN_NONE ;
3372 if (s[0] == '-') /* Additional switches on #! line. */
3377 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3383 #ifdef ALTERNATE_SHEBANG
3384 case 'S': /* OS/2 needs -S on "extproc" line. */
3388 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3393 /* compliments of Tom Christiansen */
3395 /* unexec() can be found in the Gnu emacs distribution */
3396 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3399 Perl_my_unexec(pTHX)
3401 PERL_UNUSED_CONTEXT;
3403 SV * prog = newSVpv(BIN_EXP, 0);
3404 SV * file = newSVpv(PL_origfilename, 0);
3408 sv_catpvs(prog, "/perl");
3409 sv_catpvs(file, ".perldump");
3411 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3412 /* unexec prints msg to stderr in case of failure */
3413 PerlProc_exit(status);
3416 # include <lib$routines.h>
3417 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3418 # elif defined(WIN32) || defined(__CYGWIN__)
3419 Perl_croak(aTHX_ "dump is not supported");
3421 ABORT(); /* for use with undump */
3426 /* initialize curinterp */
3432 # define PERLVAR(var,type)
3433 # define PERLVARA(var,n,type)
3434 # if defined(PERL_IMPLICIT_CONTEXT)
3435 # define PERLVARI(var,type,init) aTHX->var = init;
3436 # define PERLVARIC(var,type,init) aTHX->var = init;
3438 # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init;
3439 # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init;
3441 # include "intrpvar.h"
3447 # define PERLVAR(var,type)
3448 # define PERLVARA(var,n,type)
3449 # define PERLVARI(var,type,init) PL_##var = init;
3450 # define PERLVARIC(var,type,init) PL_##var = init;
3451 # include "intrpvar.h"
3458 /* As these are inside a structure, PERLVARI isn't capable of initialising
3460 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3461 PL_reg_poscache = PL_reg_starttry = NULL;
3465 S_init_main_stash(pTHX)
3470 PL_curstash = PL_defstash = newHV();
3471 /* We know that the string "main" will be in the global shared string
3472 table, so it's a small saving to use it rather than allocate another
3474 PL_curstname = newSVpvs_share("main");
3475 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3476 /* If we hadn't caused another reference to "main" to be in the shared
3477 string table above, then it would be worth reordering these two,
3478 because otherwise all we do is delete "main" from it as a consequence
3479 of the SvREFCNT_dec, only to add it again with hv_name_set */
3480 SvREFCNT_dec(GvHV(gv));
3481 hv_name_set(PL_defstash, "main", 4, 0);
3482 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3484 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3486 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3487 GvMULTI_on(PL_incgv);
3488 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3489 GvMULTI_on(PL_hintgv);
3490 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3491 SvREFCNT_inc_simple_void(PL_defgv);
3492 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3493 SvREFCNT_inc_simple_void(PL_errgv);
3494 GvMULTI_on(PL_errgv);
3495 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3496 GvMULTI_on(PL_replgv);
3497 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3498 #ifdef PERL_DONT_CREATE_GVSV
3501 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3503 PL_curstash = PL_defstash;
3504 CopSTASH_set(&PL_compiling, PL_defstash);
3505 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3506 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3508 /* We must init $/ before switches are processed. */
3509 sv_setpvs(get_sv("/", GV_ADD), "\n");
3513 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3514 bool *suidscript, PerlIO **rsfpp)
3519 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3522 PL_origfilename = savepvs("-e");
3525 /* if find_script() returns, it returns a malloc()-ed value */
3526 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3528 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3529 const char *s = scriptname + 8;
3535 * Tell apart "normal" usage of fdscript, e.g.
3536 * with bash on FreeBSD:
3537 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3538 * from usage in suidperl.
3539 * Does any "normal" usage leave garbage after the number???
3540 * Is it a mistake to use a similar /dev/fd/ construct for
3545 * Be supersafe and do some sanity-checks.
3546 * Still, can we be sure we got the right thing?
3549 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3552 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3554 scriptname = savepv(s + 1);
3555 Safefree(PL_origfilename);
3556 PL_origfilename = (char *)scriptname;
3561 CopFILE_free(PL_curcop);
3562 CopFILE_set(PL_curcop, PL_origfilename);
3563 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3564 scriptname = (char *)"";
3565 if (fdscript >= 0) {
3566 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3567 # if defined(HAS_FCNTL) && defined(F_SETFD)
3569 /* ensure close-on-exec */
3570 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3573 else if (!*scriptname) {
3574 forbid_setid(0, *suidscript);
3575 *rsfpp = PerlIO_stdin();
3578 #ifdef FAKE_BIT_BUCKET
3579 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3580 * is called) and still have the "-e" work. (Believe it or not,
3581 * a /dev/null is required for the "-e" to work because source
3582 * filter magic is used to implement it. ) This is *not* a general
3583 * replacement for a /dev/null. What we do here is create a temp
3584 * file (an empty file), open up that as the script, and then
3585 * immediately close and unlink it. Close enough for jazz. */
3586 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3587 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3588 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3589 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3590 FAKE_BIT_BUCKET_TEMPLATE
3592 const char * const err = "Failed to create a fake bit bucket";
3593 if (strEQ(scriptname, BIT_BUCKET)) {
3594 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3595 int tmpfd = mkstemp(tmpname);
3597 scriptname = tmpname;
3600 Perl_croak(aTHX_ err);
3603 scriptname = mktemp(tmpname);
3605 Perl_croak(aTHX_ err);
3610 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3611 #ifdef FAKE_BIT_BUCKET
3612 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3613 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3614 && strlen(scriptname) == sizeof(tmpname) - 1) {
3617 scriptname = BIT_BUCKET;
3619 # if defined(HAS_FCNTL) && defined(F_SETFD)
3621 /* ensure close-on-exec */
3622 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3626 /* PSz 16 Sep 03 Keep neat error message */
3628 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3630 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3631 CopFILE(PL_curcop), Strerror(errno));
3637 * I_SYSSTATVFS HAS_FSTATVFS
3639 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3640 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3641 * here so that metaconfig picks them up. */
3644 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3645 /* Don't even need this function. */
3648 S_validate_suid(pTHX_ PerlIO *rsfp)
3650 PERL_ARGS_ASSERT_VALIDATE_SUID;
3652 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3655 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3656 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3658 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3661 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3662 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3663 /* not set-id, must be wrapped */
3666 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3669 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3673 register const char *s2;
3675 PERL_ARGS_ASSERT_FIND_BEGINNING;
3677 /* skip forward in input to the real script? */
3679 while (PL_doextract) {
3680 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3681 Perl_croak(aTHX_ "No Perl script found in input\n");
3683 if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) {
3684 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3685 PL_doextract = FALSE;
3686 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3688 while (*s == ' ' || *s == '\t') s++;
3690 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3691 || s2[-1] == '_') s2--;
3692 if (strnEQ(s2-4,"perl",4))
3693 while ((s = moreswitches(s)))
3705 PL_uid = PerlProc_getuid();
3706 PL_euid = PerlProc_geteuid();
3707 PL_gid = PerlProc_getgid();
3708 PL_egid = PerlProc_getegid();
3710 PL_uid |= PL_gid << 16;
3711 PL_euid |= PL_egid << 16;
3713 /* Should not happen: */
3714 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3715 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3718 * Should go by suidscript, not uid!=euid: why disallow
3719 * system("ls") in scripts run from setuid things?
3720 * Or, is this run before we check arguments and set suidscript?
3721 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3722 * (We never have suidscript, can we be sure to have fdscript?)
3723 * Or must then go by UID checks? See comments in forbid_setid also.
3727 /* This is used very early in the lifetime of the program,
3728 * before even the options are parsed, so PL_tainting has
3729 * not been initialized properly. */
3731 Perl_doing_taint(int argc, char *argv[], char *envp[])
3733 #ifndef PERL_IMPLICIT_SYS
3734 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3735 * before we have an interpreter-- and the whole point of this
3736 * function is to be called at such an early stage. If you are on
3737 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3738 * "tainted because running with altered effective ids', you'll
3739 * have to add your own checks somewhere in here. The two most
3740 * known samples of 'implicitness' are Win32 and NetWare, neither
3741 * of which has much of concept of 'uids'. */
3742 int uid = PerlProc_getuid();
3743 int euid = PerlProc_geteuid();
3744 int gid = PerlProc_getgid();
3745 int egid = PerlProc_getegid();
3752 if (uid && (euid != uid || egid != gid))
3754 #endif /* !PERL_IMPLICIT_SYS */
3755 /* This is a really primitive check; environment gets ignored only
3756 * if -T are the first chars together; otherwise one gets
3757 * "Too late" message. */
3758 if ( argc > 1 && argv[1][0] == '-'
3759 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3764 /* Passing the flag as a single char rather than a string is a slight space
3765 optimisation. The only message that isn't /^-.$/ is
3766 "program input from stdin", which is substituted in place of '\0', which
3767 could never be a command line flag. */
3769 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3772 char string[3] = "-x";
3773 const char *message = "program input from stdin";
3780 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3781 if (PL_euid != PL_uid)
3782 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3783 if (PL_egid != PL_gid)
3784 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3785 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3787 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3791 Perl_init_dbargs(pTHX)
3793 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3798 /* Someone has already created it.
3799 It might have entries, and if we just turn off AvREAL(), they will
3800 "leak" until global destruction. */
3803 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
3807 Perl_init_debugger(pTHX)
3810 HV * const ostash = PL_curstash;
3812 PL_curstash = PL_debstash;
3814 Perl_init_dbargs(aTHX);
3815 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3816 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3817 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3818 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3819 if (!SvIOK(PL_DBsingle))
3820 sv_setiv(PL_DBsingle, 0);
3821 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3822 if (!SvIOK(PL_DBtrace))
3823 sv_setiv(PL_DBtrace, 0);
3824 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3825 if (!SvIOK(PL_DBsignal))
3826 sv_setiv(PL_DBsignal, 0);
3827 PL_curstash = ostash;
3830 #ifndef STRESS_REALLOC
3831 #define REASONABLE(size) (size)
3833 #define REASONABLE(size) (1) /* unreasonable */
3837 Perl_init_stacks(pTHX)
3840 /* start with 128-item stack and 8K cxstack */
3841 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3842 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3843 PL_curstackinfo->si_type = PERLSI_MAIN;
3844 PL_curstack = PL_curstackinfo->si_stack;
3845 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3847 PL_stack_base = AvARRAY(PL_curstack);
3848 PL_stack_sp = PL_stack_base;
3849 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3851 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3854 PL_tmps_max = REASONABLE(128);
3856 Newx(PL_markstack,REASONABLE(32),I32);
3857 PL_markstack_ptr = PL_markstack;
3858 PL_markstack_max = PL_markstack + REASONABLE(32);
3862 Newx(PL_scopestack,REASONABLE(32),I32);
3864 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3866 PL_scopestack_ix = 0;
3867 PL_scopestack_max = REASONABLE(32);
3869 Newx(PL_savestack,REASONABLE(128),ANY);
3870 PL_savestack_ix = 0;
3871 PL_savestack_max = REASONABLE(128);
3880 while (PL_curstackinfo->si_next)
3881 PL_curstackinfo = PL_curstackinfo->si_next;
3882 while (PL_curstackinfo) {
3883 PERL_SI *p = PL_curstackinfo->si_prev;
3884 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3885 Safefree(PL_curstackinfo->si_cxstack);
3886 Safefree(PL_curstackinfo);
3887 PL_curstackinfo = p;
3889 Safefree(PL_tmps_stack);
3890 Safefree(PL_markstack);
3891 Safefree(PL_scopestack);
3893 Safefree(PL_scopestack_name);
3895 Safefree(PL_savestack);
3900 S_init_predump_symbols(pTHX)
3907 sv_setpvs(get_sv("\"", GV_ADD), " ");
3908 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
3911 /* Historically, PVIOs were blessed into IO::Handle, unless
3912 FileHandle was loaded, in which case they were blessed into
3913 that. Action at a distance.
3914 However, if we simply bless into IO::Handle, we break code
3915 that assumes that PVIOs will have (among others) a seek
3916 method. IO::File inherits from IO::Handle and IO::Seekable,
3917 and provides the needed methods. But if we simply bless into
3918 it, then we break code that assumed that by loading
3919 IO::Handle, *it* would work.
3920 So a compromise is to set up the correct @IO::File::ISA,
3921 so that code that does C<use IO::Handle>; will still work.
3924 isa = get_av("IO::File::ISA", GV_ADD | GV_ADDMULTI);
3925 av_push(isa, newSVpvs("IO::Handle"));
3926 av_push(isa, newSVpvs("IO::Seekable"));
3927 av_push(isa, newSVpvs("Exporter"));
3928 (void) gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVGV);
3929 (void) gv_fetchpvs("IO::Seekable::", GV_ADD, SVt_PVGV);
3930 (void) gv_fetchpvs("Exporter::", GV_ADD, SVt_PVGV);
3933 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3934 GvMULTI_on(PL_stdingv);
3935 io = GvIOp(PL_stdingv);
3936 IoTYPE(io) = IoTYPE_RDONLY;
3937 IoIFP(io) = PerlIO_stdin();
3938 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
3940 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3942 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3945 IoTYPE(io) = IoTYPE_WRONLY;
3946 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
3948 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
3950 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3952 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
3953 GvMULTI_on(PL_stderrgv);
3954 io = GvIOp(PL_stderrgv);
3955 IoTYPE(io) = IoTYPE_WRONLY;
3956 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
3957 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
3959 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
3961 PL_statname = newSV(0); /* last filename we did stat on */
3965 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
3969 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
3971 argc--,argv++; /* skip name of script */
3972 if (PL_doswitches) {
3973 for (; argc > 0 && **argv == '-'; argc--,argv++) {
3977 if (argv[0][1] == '-' && !argv[0][2]) {
3981 if ((s = strchr(argv[0], '='))) {
3982 const char *const start_name = argv[0] + 1;
3983 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
3984 TRUE, SVt_PV)), s + 1);
3987 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
3990 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
3991 GvMULTI_on(PL_argvgv);
3992 (void)gv_AVadd(PL_argvgv);
3993 av_clear(GvAVn(PL_argvgv));
3994 for (; argc > 0; argc--,argv++) {
3995 SV * const sv = newSVpv(argv[0],0);
3996 av_push(GvAVn(PL_argvgv),sv);
3997 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
3998 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4001 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4002 (void)sv_utf8_decode(sv);
4008 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4013 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4015 PL_toptarget = newSV_type(SVt_PVFM);
4016 sv_setpvs(PL_toptarget, "");
4017 PL_bodytarget = newSV_type(SVt_PVFM);
4018 sv_setpvs(PL_bodytarget, "");
4019 PL_formtarget = PL_bodytarget;
4023 init_argv_symbols(argc,argv);
4025 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4026 sv_setpv(GvSV(tmpgv),PL_origfilename);
4028 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4030 bool env_is_not_environ;
4031 GvMULTI_on(PL_envgv);
4032 hv = GvHVn(PL_envgv);
4033 hv_magic(hv, NULL, PERL_MAGIC_env);
4035 #ifdef USE_ENVIRON_ARRAY
4036 /* Note that if the supplied env parameter is actually a copy
4037 of the global environ then it may now point to free'd memory
4038 if the environment has been modified since. To avoid this
4039 problem we treat env==NULL as meaning 'use the default'
4043 env_is_not_environ = env != environ;
4044 if (env_is_not_environ
4045 # ifdef USE_ITHREADS
4046 && PL_curinterp == aTHX
4055 for (; *env; env++) {
4058 if (!(s = strchr(old_var,'=')) || s == old_var)
4061 #if defined(MSDOS) && !defined(DJGPP)
4063 (void)strupr(old_var);
4066 sv = newSVpv(s+1, 0);
4067 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4068 if (env_is_not_environ)
4072 #endif /* USE_ENVIRON_ARRAY */
4073 #endif /* !PERL_MICRO */
4076 if ((tmpgv = gv_fetchpvs("$", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4077 SvREADONLY_off(GvSV(tmpgv));
4078 sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid());
4079 SvREADONLY_on(GvSV(tmpgv));
4081 #ifdef THREADS_HAVE_PIDS
4082 PL_ppid = (IV)getppid();
4085 /* touch @F array to prevent spurious warnings 20020415 MJD */
4087 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4092 S_init_perllib(pTHX)
4096 const char *perl5lib = NULL;
4099 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4105 perl5lib = PerlEnv_getenv("PERL5LIB");
4107 * It isn't possible to delete an environment variable with
4108 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4109 * case we treat PERL5LIB as undefined if it has a zero-length value.
4111 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4112 if (perl5lib && *perl5lib != '\0')
4116 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4118 s = PerlEnv_getenv("PERLLIB");
4120 incpush_use_sep(s, 0, 0);
4123 /* Treat PERL5?LIB as a possible search list logical name -- the
4124 * "natural" VMS idiom for a Unix path string. We allow each
4125 * element to be a set of |-separated directories for compatibility.
4129 if (my_trnlnm("PERL5LIB",buf,0))
4131 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4132 } while (my_trnlnm("PERL5LIB",buf,++idx));
4134 while (my_trnlnm("PERLLIB",buf,idx++))
4135 incpush_use_sep(buf, 0, 0);
4140 #ifndef PERL_IS_MINIPERL
4141 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4142 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4144 /* Use the ~-expanded versions of APPLLIB (undocumented),
4145 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4148 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4149 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4153 /* sitearch is always relative to sitelib on Windows for
4154 * DLL-based path intuition to work correctly */
4155 # if !defined(WIN32)
4156 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4157 INCPUSH_CAN_RELOCATE);
4163 /* this picks up sitearch as well */
4164 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4166 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4168 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4172 #ifdef PERL_VENDORARCH_EXP
4173 /* vendorarch is always relative to vendorlib on Windows for
4174 * DLL-based path intuition to work correctly */
4175 # if !defined(WIN32)
4176 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4177 INCPUSH_CAN_RELOCATE);
4181 #ifdef PERL_VENDORLIB_EXP
4183 /* this picks up vendorarch as well */
4184 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4186 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4188 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4189 INCPUSH_CAN_RELOCATE);
4194 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4198 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4202 s = win32_get_privlib(PERL_FS_VERSION, &len);
4204 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4207 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4209 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4213 #ifdef PERL_OTHERLIBDIRS
4214 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4215 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4216 |INCPUSH_CAN_RELOCATE);
4222 * It isn't possible to delete an environment variable with
4223 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4224 * case we treat PERL5LIB as undefined if it has a zero-length value.
4226 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4227 if (perl5lib && *perl5lib != '\0')
4231 incpush_use_sep(perl5lib, 0,
4232 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4234 /* Treat PERL5?LIB as a possible search list logical name -- the
4235 * "natural" VMS idiom for a Unix path string. We allow each
4236 * element to be a set of |-separated directories for compatibility.
4240 if (my_trnlnm("PERL5LIB",buf,0))
4242 incpush_use_sep(buf, 0,
4243 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4244 } while (my_trnlnm("PERL5LIB",buf,++idx));
4248 /* Use the ~-expanded versions of APPLLIB (undocumented),
4249 SITELIB and VENDORLIB for older versions
4252 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4253 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4256 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4257 /* Search for version-specific dirs below here */
4258 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4259 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4263 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4264 /* Search for version-specific dirs below here */
4265 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4266 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4269 #ifdef PERL_OTHERLIBDIRS
4270 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4271 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4272 |INCPUSH_CAN_RELOCATE);
4274 #endif /* !PERL_IS_MINIPERL */
4277 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4280 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4281 # define PERLLIB_SEP ';'
4284 # define PERLLIB_SEP '|'
4286 # define PERLLIB_SEP ':'
4289 #ifndef PERLLIB_MANGLE
4290 # define PERLLIB_MANGLE(s,n) (s)
4293 /* Push a directory onto @INC if it exists.
4294 Generate a new SV if we do this, to save needing to copy the SV we push
4297 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4302 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4304 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4305 S_ISDIR(tmpstatbuf.st_mode)) {
4307 dir = newSVsv(stem);
4309 /* Truncate dir back to stem. */
4310 SvCUR_set(dir, SvCUR(stem));
4316 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4319 const U8 using_sub_dirs
4320 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4321 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4322 const U8 add_versioned_sub_dirs
4323 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4324 const U8 add_archonly_sub_dirs
4325 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4326 #ifdef PERL_INC_VERSION_LIST
4327 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4329 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4330 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4331 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4332 AV *const inc = GvAVn(PL_incgv);
4334 PERL_ARGS_ASSERT_INCPUSH;
4337 /* Could remove this vestigial extra block, if we don't mind a lot of
4338 re-indenting diff noise. */
4341 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4342 arranged to unshift #! line -I onto the front of @INC. However,
4343 -I can add version and architecture specific libraries, and they
4344 need to go first. The old code assumed that it was always
4345 pushing. Hence to make it work, need to push the architecture
4346 (etc) libraries onto a temporary array, then "unshift" that onto
4347 the front of @INC. */
4348 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4351 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4352 defined to so something (in os2/os2.c), but the code has been
4353 this way, ignoring any possible changed of length, since
4354 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4356 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4358 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4361 /* Do the if() outside the #ifdef to avoid warnings about an unused
4364 #ifdef PERL_RELOCATABLE_INC
4366 * Relocatable include entries are marked with a leading .../
4369 * 0: Remove that leading ".../"
4370 * 1: Remove trailing executable name (anything after the last '/')
4371 * from the perl path to give a perl prefix
4373 * While the @INC element starts "../" and the prefix ends with a real
4374 * directory (ie not . or ..) chop that real directory off the prefix
4375 * and the leading "../" from the @INC element. ie a logical "../"
4377 * Finally concatenate the prefix and the remainder of the @INC element
4378 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4379 * generates /usr/local/lib/perl5
4381 const char *libpath = SvPVX(libdir);
4382 STRLEN libpath_len = SvCUR(libdir);
4383 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4385 SV * const caret_X = get_sv("\030", 0);
4386 /* Going to use the SV just as a scratch buffer holding a C
4392 /* $^X is *the* source of taint if tainting is on, hence
4393 SvPOK() won't be true. */
4395 assert(SvPOKp(caret_X));
4396 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4398 /* Firstly take off the leading .../
4399 If all else fail we'll do the paths relative to the current
4401 sv_chop(libdir, libpath + 4);
4402 /* Don't use SvPV as we're intentionally bypassing taining,
4403 mortal copies that the mg_get of tainting creates, and
4404 corruption that seems to come via the save stack.
4405 I guess that the save stack isn't correctly set up yet. */
4406 libpath = SvPVX(libdir);
4407 libpath_len = SvCUR(libdir);
4409 /* This would work more efficiently with memrchr, but as it's
4410 only a GNU extension we'd need to probe for it and
4411 implement our own. Not hard, but maybe not worth it? */
4413 prefix = SvPVX(prefix_sv);
4414 lastslash = strrchr(prefix, '/');
4416 /* First time in with the *lastslash = '\0' we just wipe off
4417 the trailing /perl from (say) /usr/foo/bin/perl
4421 while ((*lastslash = '\0'), /* Do that, come what may. */
4422 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4423 && (lastslash = strrchr(prefix, '/')))) {
4424 if (lastslash[1] == '\0'
4425 || (lastslash[1] == '.'
4426 && (lastslash[2] == '/' /* ends "/." */
4427 || (lastslash[2] == '/'
4428 && lastslash[3] == '/' /* or "/.." */
4430 /* Prefix ends "/" or "/." or "/..", any of which
4431 are fishy, so don't do any more logical cleanup.
4435 /* Remove leading "../" from path */
4438 /* Next iteration round the loop removes the last
4439 directory name from prefix by writing a '\0' in
4440 the while clause. */
4442 /* prefix has been terminated with a '\0' to the correct
4443 length. libpath points somewhere into the libdir SV.
4444 We need to join the 2 with '/' and drop the result into
4446 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4447 SvREFCNT_dec(libdir);
4448 /* And this is the new libdir. */
4451 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4452 /* Need to taint reloccated paths if running set ID */
4453 SvTAINTED_on(libdir);
4456 SvREFCNT_dec(prefix_sv);
4461 * BEFORE pushing libdir onto @INC we may first push version- and
4462 * archname-specific sub-directories.
4464 if (using_sub_dirs) {
4466 #ifdef PERL_INC_VERSION_LIST
4467 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4468 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4469 const char * const *incver;
4476 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4478 while (unix[len-1] == '/') len--; /* Cosmetic */
4479 sv_usepvn(libdir,unix,len);
4482 PerlIO_printf(Perl_error_log,
4483 "Failed to unixify @INC element \"%s\"\n",
4487 subdir = newSVsv(libdir);
4489 if (add_versioned_sub_dirs) {
4490 /* .../version/archname if -d .../version/archname */
4491 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4492 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4494 /* .../version if -d .../version */
4495 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4496 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4499 #ifdef PERL_INC_VERSION_LIST
4501 for (incver = incverlist; *incver; incver++) {
4502 /* .../xxx if -d .../xxx */
4503 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4504 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4509 if (add_archonly_sub_dirs) {
4510 /* .../archname if -d .../archname */
4511 sv_catpvs(subdir, "/" ARCHNAME);
4512 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4516 assert (SvREFCNT(subdir) == 1);
4517 SvREFCNT_dec(subdir);
4520 /* finally add this lib directory at the end of @INC */
4522 U32 extra = av_len(av) + 1;
4523 av_unshift(inc, extra + push_basedir);
4525 av_store(inc, extra, libdir);
4527 /* av owns a reference, av_store() expects to be donated a
4528 reference, and av expects to be sane when it's cleared.
4529 If I wanted to be naughty and wrong, I could peek inside the
4530 implementation of av_clear(), realise that it uses
4531 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4532 and so directly steal from it (with a memcpy() to inc, and
4533 then memset() to NULL them out. But people copy code from the
4534 core expecting it to be best practise, so let's use the API.
4535 Although studious readers will note that I'm not checking any
4537 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4541 else if (push_basedir) {
4542 av_push(inc, libdir);
4545 if (!push_basedir) {
4546 assert (SvREFCNT(libdir) == 1);
4547 SvREFCNT_dec(libdir);
4553 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4557 /* This logic has been broken out from S_incpush(). It may be possible to
4560 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4567 /* Break at all separators */
4568 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4570 /* skip any consecutive separators */
4572 /* Uncomment the next line for PATH semantics */
4573 /* But you'll need to write tests */
4574 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4576 incpush(p, (STRLEN)(s - p), flags);
4581 incpush(p, (STRLEN)(end - p), flags);
4586 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4590 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4596 PERL_ARGS_ASSERT_CALL_LIST;
4598 while (av_len(paramList) >= 0) {
4599 cv = MUTABLE_CV(av_shift(paramList));
4601 if (paramList == PL_beginav) {
4602 /* save PL_beginav for compiler */
4603 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4605 else if (paramList == PL_checkav) {
4606 /* save PL_checkav for compiler */
4607 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4609 else if (paramList == PL_unitcheckav) {
4610 /* save PL_unitcheckav for compiler */
4611 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4622 PL_madskills |= 16384;
4627 PL_madskills &= ~16384;
4630 (void)SvPV_const(atsv, len);
4632 PL_curcop = &PL_compiling;
4633 CopLINE_set(PL_curcop, oldline);
4634 if (paramList == PL_beginav)
4635 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4637 Perl_sv_catpvf(aTHX_ atsv,
4638 "%s failed--call queue aborted",
4639 paramList == PL_checkav ? "CHECK"
4640 : paramList == PL_initav ? "INIT"
4641 : paramList == PL_unitcheckav ? "UNITCHECK"
4643 while (PL_scopestack_ix > oldscope)
4646 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4653 /* my_exit() was called */
4654 while (PL_scopestack_ix > oldscope)
4657 PL_curstash = PL_defstash;
4658 PL_curcop = &PL_compiling;
4659 CopLINE_set(PL_curcop, oldline);
4665 PL_curcop = &PL_compiling;
4666 CopLINE_set(PL_curcop, oldline);
4669 PerlIO_printf(Perl_error_log, "panic: restartop\n");
4678 Perl_my_exit(pTHX_ U32 status)
4689 STATUS_EXIT_SET(status);
4696 Perl_my_failure_exit(pTHX)
4700 /* We have been called to fall on our sword. The desired exit code
4701 * should be already set in STATUS_UNIX, but could be shifted over
4702 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4705 * If an error code has not been set, then force the issue.
4707 if (MY_POSIX_EXIT) {
4709 /* According to the die_exit.t tests, if errno is non-zero */
4710 /* It should be used for the error status. */
4712 if (errno == EVMSERR) {
4713 STATUS_NATIVE = vaxc$errno;
4716 /* According to die_exit.t tests, if the child_exit code is */
4717 /* also zero, then we need to exit with a code of 255 */
4718 if ((errno != 0) && (errno < 256))
4719 STATUS_UNIX_EXIT_SET(errno);
4720 else if (STATUS_UNIX < 255) {
4721 STATUS_UNIX_EXIT_SET(255);
4726 /* The exit code could have been set by $? or vmsish which
4727 * means that it may not have fatal set. So convert
4728 * success/warning codes to fatal with out changing
4729 * the POSIX status code. The severity makes VMS native
4730 * status handling work, while UNIX mode programs use the
4731 * the POSIX exit codes.
4733 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4734 STATUS_NATIVE &= STS$M_COND_ID;
4735 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4739 /* Traditionally Perl on VMS always expects a Fatal Error. */
4740 if (vaxc$errno & 1) {
4742 /* So force success status to failure */
4743 if (STATUS_NATIVE & 1)
4748 STATUS_UNIX = EINTR; /* In case something cares */
4753 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4755 /* Encode the severity code */
4756 severity = STATUS_NATIVE & STS$M_SEVERITY;
4757 STATUS_UNIX = (severity ? severity : 1) << 8;
4759 /* Perl expects this to be a fatal error */
4760 if (severity != STS$K_SEVERE)
4769 STATUS_UNIX_SET(errno);
4771 exitstatus = STATUS_UNIX >> 8;
4772 if (exitstatus & 255)
4773 STATUS_UNIX_SET(exitstatus);
4775 STATUS_UNIX_SET(255);
4782 S_my_exit_jump(pTHX)
4787 SvREFCNT_dec(PL_e_script);
4791 POPSTACK_TO(PL_mainstack);
4799 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4802 const char * const p = SvPVX_const(PL_e_script);
4803 const char *nl = strchr(p, '\n');
4805 PERL_UNUSED_ARG(idx);
4806 PERL_UNUSED_ARG(maxlen);
4808 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4810 filter_del(read_e_script);
4813 sv_catpvn(buf_sv, p, nl-p);
4814 sv_chop(PL_e_script, nl);
4820 * c-indentation-style: bsd
4822 * indent-tabs-mode: t
4825 * ex: set ts=8 sts=4 sw=4 noet: