4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * by Larry Wall and others
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
27 #ifdef PERL_IS_MINIPERL
28 # define USE_SITECUSTOMIZE
32 #define PERL_IN_PERL_C
34 #include "patchlevel.h" /* for local_patches */
41 #ifdef USE_KERN_PROC_PATHNAME
42 # include <sys/sysctl.h>
45 #ifdef USE_NSGETEXECUTABLEPATH
46 # include <mach-o/dyld.h>
49 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
56 char control[CMSG_SPACE(sizeof(int))];
73 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
74 char *getenv (char *); /* Usually in <stdlib.h> */
77 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
79 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
80 /* Drop everything. Heck, don't even try to call it */
81 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
83 /* Drop almost everything */
84 # define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
87 #define CALL_BODY_SUB(myop) \
88 if (PL_op == (myop)) \
89 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
93 #define CALL_LIST_BODY(cv) \
94 PUSHMARK(PL_stack_sp); \
95 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
98 S_init_tls_and_interp(PerlInterpreter *my_perl)
102 PERL_SET_INTERP(my_perl);
103 #if defined(USE_ITHREADS)
106 PERL_SET_THX(my_perl);
110 MUTEX_INIT(&PL_dollarzero_mutex);
111 MUTEX_INIT(&PL_my_ctx_mutex);
114 #if defined(USE_ITHREADS)
117 /* This always happens for non-ithreads */
120 PERL_SET_THX(my_perl);
125 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
128 Perl_sys_init(int* argc, char*** argv)
132 PERL_ARGS_ASSERT_SYS_INIT;
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_SYS_INIT_BODY(argc, argv);
140 Perl_sys_init3(int* argc, char*** argv, char*** env)
144 PERL_ARGS_ASSERT_SYS_INIT3;
146 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
147 PERL_UNUSED_ARG(argv);
148 PERL_UNUSED_ARG(env);
149 PERL_SYS_INIT3_BODY(argc, argv, env);
156 if (!PL_veto_cleanup) {
157 PERL_SYS_TERM_BODY();
162 #ifdef PERL_IMPLICIT_SYS
164 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
165 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
166 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
167 struct IPerlDir* ipD, struct IPerlSock* ipS,
168 struct IPerlProc* ipP)
170 PerlInterpreter *my_perl;
172 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
174 /* Newx() needs interpreter, so call malloc() instead */
175 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
176 S_init_tls_and_interp(my_perl);
177 Zero(my_perl, 1, PerlInterpreter);
187 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
194 =head1 Embedding Functions
196 =for apidoc perl_alloc
198 Allocates a new Perl interpreter. See L<perlembed>.
206 PerlInterpreter *my_perl;
208 /* Newx() needs interpreter, so call malloc() instead */
209 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
211 S_init_tls_and_interp(my_perl);
212 #ifndef PERL_TRACK_MEMPOOL
213 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
215 Zero(my_perl, 1, PerlInterpreter);
216 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
220 #endif /* PERL_IMPLICIT_SYS */
223 =for apidoc perl_construct
225 Initializes a new Perl interpreter. See L<perlembed>.
231 perl_construct(pTHXx)
235 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
239 PL_perl_destruct_level = 1;
241 PERL_UNUSED_ARG(my_perl);
242 if (PL_perl_destruct_level > 0)
245 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
247 /* set read-only and try to insure than we wont see REFCNT==0
250 SvREADONLY_on(&PL_sv_undef);
251 SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
253 sv_setpv(&PL_sv_no,PL_No);
254 /* value lookup in void context - happens to have the side effect
255 of caching the numeric forms. However, as &PL_sv_no doesn't contain
256 a string that is a valid numer, we have to turn the public flags by
262 SvREADONLY_on(&PL_sv_no);
263 SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
265 sv_setpv(&PL_sv_yes,PL_Yes);
268 SvREADONLY_on(&PL_sv_yes);
269 SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
271 SvREADONLY_on(&PL_sv_placeholder);
272 SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
274 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
275 #ifdef PERL_USES_PL_PIDSTATUS
276 PL_pidstatus = newHV();
279 PL_rs = newSVpvs("\n");
289 SET_NUMERIC_STANDARD();
291 #if defined(LOCAL_PATCH_COUNT)
292 PL_localpatches = local_patches; /* For possible -v */
295 #ifdef HAVE_INTERP_INTERN
299 PerlIO_init(aTHX); /* Hook to IO system */
301 PL_fdpid = newAV(); /* for remembering popen pids by fd */
302 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
303 PL_errors = newSVpvs("");
304 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
305 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
306 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
308 /* First entry is a list of empty elements. It needs to be initialised
309 else all hell breaks loose in S_find_uninit_var(). */
310 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
311 PL_regex_pad = AvARRAY(PL_regex_padav);
313 #ifdef USE_REENTRANT_API
314 Perl_reentrant_init(aTHX);
317 /* Note that strtab is a rather special HV. Assumptions are made
318 about not iterating on it, and not adding tie magic to it.
319 It is properly deallocated in perl_destruct() */
322 HvSHAREKEYS_off(PL_strtab); /* mandatory */
323 hv_ksplit(PL_strtab, 512);
325 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
326 _dyld_lookup_and_bind
327 ("__environ", (unsigned long *) &environ_pointer, NULL);
331 # ifdef USE_ENVIRON_ARRAY
332 PL_origenviron = environ;
336 /* Use sysconf(_SC_CLK_TCK) if available, if not
337 * available or if the sysconf() fails, use the HZ.
338 * BeOS has those, but returns the wrong value.
339 * The HZ if not originally defined has been by now
340 * been defined as CLK_TCK, if available. */
341 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
342 PL_clocktick = sysconf(_SC_CLK_TCK);
343 if (PL_clocktick <= 0)
347 PL_stashcache = newHV();
349 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
350 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
353 if (!PL_mmap_page_size) {
354 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
356 SETERRNO(0, SS_NORMAL);
358 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
360 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
362 if ((long) PL_mmap_page_size < 0) {
364 SV * const error = ERRSV;
365 SvUPGRADE(error, SVt_PV);
366 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
369 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
373 # ifdef HAS_GETPAGESIZE
374 PL_mmap_page_size = getpagesize();
376 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
377 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
381 if (PL_mmap_page_size <= 0)
382 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
383 (IV) PL_mmap_page_size);
385 #endif /* HAS_MMAP */
387 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
388 PL_timesbase.tms_utime = 0;
389 PL_timesbase.tms_stime = 0;
390 PL_timesbase.tms_cutime = 0;
391 PL_timesbase.tms_cstime = 0;
394 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
396 PL_registered_mros = newHV();
397 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
398 HvMAX(PL_registered_mros) = 0;
404 =for apidoc nothreadhook
406 Stub that provides thread hook for perl_destruct when there are
413 Perl_nothreadhook(pTHX)
419 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
421 Perl_dump_sv_child(pTHX_ SV *sv)
424 const int sock = PL_dumper_fd;
425 const int debug_fd = PerlIO_fileno(Perl_debug_log);
426 union control_un control;
429 struct cmsghdr *cmptr;
431 unsigned char buffer[256];
433 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
435 if(sock == -1 || debug_fd == -1)
438 PerlIO_flush(Perl_debug_log);
440 /* All these shenanigans are to pass a file descriptor over to our child for
441 it to dump out to. We can't let it hold open the file descriptor when it
442 forks, as the file descriptor it will dump to can turn out to be one end
443 of pipe that some other process will wait on for EOF. (So as it would
444 be open, the wait would be forever.) */
446 msg.msg_control = control.control;
447 msg.msg_controllen = sizeof(control.control);
448 /* We're a connected socket so we don't need a destination */
454 cmptr = CMSG_FIRSTHDR(&msg);
455 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
456 cmptr->cmsg_level = SOL_SOCKET;
457 cmptr->cmsg_type = SCM_RIGHTS;
458 *((int *)CMSG_DATA(cmptr)) = 1;
460 vec[0].iov_base = (void*)&sv;
461 vec[0].iov_len = sizeof(sv);
462 got = sendmsg(sock, &msg, 0);
465 perror("Debug leaking scalars parent sendmsg failed");
468 if(got < sizeof(sv)) {
469 perror("Debug leaking scalars parent short sendmsg");
473 /* Return protocol is
475 unsigned char: length of location string (0 for empty)
476 unsigned char*: string (not terminated)
478 vec[0].iov_base = (void*)&returned_errno;
479 vec[0].iov_len = sizeof(returned_errno);
480 vec[1].iov_base = buffer;
483 got = readv(sock, vec, 2);
486 perror("Debug leaking scalars parent read failed");
487 PerlIO_flush(PerlIO_stderr());
490 if(got < sizeof(returned_errno) + 1) {
491 perror("Debug leaking scalars parent short read");
492 PerlIO_flush(PerlIO_stderr());
497 got = read(sock, buffer + 1, *buffer);
499 perror("Debug leaking scalars parent read 2 failed");
500 PerlIO_flush(PerlIO_stderr());
505 perror("Debug leaking scalars parent short read 2");
506 PerlIO_flush(PerlIO_stderr());
511 if (returned_errno || *buffer) {
512 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
513 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
514 returned_errno, strerror(returned_errno));
520 =for apidoc perl_destruct
522 Shuts down a Perl interpreter. See L<perlembed>.
531 VOL signed char destruct_level; /* see possible values in intrpvar.h */
533 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
537 PERL_ARGS_ASSERT_PERL_DESTRUCT;
539 PERL_UNUSED_ARG(my_perl);
542 assert(PL_scopestack_ix == 1);
544 /* wait for all pseudo-forked children to finish */
545 PERL_WAIT_FOR_CHILDREN;
547 destruct_level = PL_perl_destruct_level;
550 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
552 const int i = atoi(s);
553 if (destruct_level < i)
559 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
565 if (PL_endav && !PL_minus_c) {
566 PERL_SET_PHASE(PERL_PHASE_END);
567 call_list(PL_scopestack_ix, PL_endav);
573 assert(PL_scopestack_ix == 0);
575 /* Need to flush since END blocks can produce output */
578 if (PL_threadhook(aTHX)) {
579 /* Threads hook has vetoed further cleanup */
580 PL_veto_cleanup = TRUE;
584 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
585 if (destruct_level != 0) {
586 /* Fork here to create a child. Our child's job is to preserve the
587 state of scalars prior to destruction, so that we can instruct it
588 to dump any scalars that we later find have leaked.
589 There's no subtlety in this code - it assumes POSIX, and it doesn't
593 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
594 perror("Debug leaking scalars socketpair failed");
600 perror("Debug leaking scalars fork failed");
604 /* We are the child */
605 const int sock = fd[1];
606 const int debug_fd = PerlIO_fileno(Perl_debug_log);
609 /* Our success message is an integer 0, and a char 0 */
610 static const char success[sizeof(int) + 1] = {0};
614 /* We need to close all other file descriptors otherwise we end up
615 with interesting hangs, where the parent closes its end of a
616 pipe, and sits waiting for (another) child to terminate. Only
617 that child never terminates, because it never gets EOF, because
618 we also have the far end of the pipe open. We even need to
619 close the debugging fd, because sometimes it happens to be one
620 end of a pipe, and a process is waiting on the other end for
621 EOF. Normally it would be closed at some point earlier in
622 destruction, but if we happen to cause the pipe to remain open,
623 EOF never occurs, and we get an infinite hang. Hence all the
624 games to pass in a file descriptor if it's actually needed. */
626 f = sysconf(_SC_OPEN_MAX);
628 where = "sysconf failed";
639 union control_un control;
642 struct cmsghdr *cmptr;
646 msg.msg_control = control.control;
647 msg.msg_controllen = sizeof(control.control);
648 /* We're a connected socket so we don't need a source */
652 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
654 vec[0].iov_base = (void*)⌖
655 vec[0].iov_len = sizeof(target);
657 got = recvmsg(sock, &msg, 0);
662 where = "recv failed";
665 if(got < sizeof(target)) {
666 where = "short recv";
670 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
674 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
675 where = "wrong cmsg_len";
678 if(cmptr->cmsg_level != SOL_SOCKET) {
679 where = "wrong cmsg_level";
682 if(cmptr->cmsg_type != SCM_RIGHTS) {
683 where = "wrong cmsg_type";
687 got_fd = *(int*)CMSG_DATA(cmptr);
688 /* For our last little bit of trickery, put the file descriptor
689 back into Perl_debug_log, as if we never actually closed it
691 if(got_fd != debug_fd) {
692 if (dup2(got_fd, debug_fd) == -1) {
699 PerlIO_flush(Perl_debug_log);
701 got = write(sock, &success, sizeof(success));
704 where = "write failed";
707 if(got < sizeof(success)) {
708 where = "short write";
715 int send_errno = errno;
716 unsigned char length = (unsigned char) strlen(where);
717 struct iovec failure[3] = {
718 {(void*)&send_errno, sizeof(send_errno)},
720 {(void*)where, length}
722 int got = writev(sock, failure, 3);
723 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
724 in the parent if we try to read from the socketpair after the
725 child has exited, even if there was data to read.
726 So sleep a bit to give the parent a fighting chance of
729 _exit((got == -1) ? errno : 0);
733 PL_dumper_fd = fd[0];
738 /* We must account for everything. */
740 /* Destroy the main CV and syntax tree */
741 /* Do this now, because destroying ops can cause new SVs to be generated
742 in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
743 PL_curcop to point to a valid op from which the filename structure
745 PL_curcop = &PL_compiling;
747 /* ensure comppad/curpad to refer to main's pad */
748 if (CvPADLIST(PL_main_cv)) {
749 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
751 op_free(PL_main_root);
754 PL_main_start = NULL;
755 /* note that PL_main_cv isn't usually actually freed at this point,
756 * due to the CvOUTSIDE refs from subs compiled within it. It will
757 * get freed once all the subs are freed in sv_clean_all(), for
758 * destruct_level > 0 */
759 SvREFCNT_dec(PL_main_cv);
761 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
763 /* Tell PerlIO we are about to tear things apart in case
764 we have layers which are using resources that should
768 PerlIO_destruct(aTHX);
770 if (PL_sv_objcount) {
772 * Try to destruct global references. We do this first so that the
773 * destructors and destructees still exist. Some sv's might remain.
774 * Non-referenced objects are on their own.
780 /* unhook hooks which will soon be, or use, destroyed data */
781 SvREFCNT_dec(PL_warnhook);
783 SvREFCNT_dec(PL_diehook);
786 /* call exit list functions */
787 while (PL_exitlistlen-- > 0)
788 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
790 Safefree(PL_exitlist);
795 SvREFCNT_dec(PL_registered_mros);
797 /* jettison our possibly duplicated environment */
798 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
799 * so we certainly shouldn't free it here
802 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
803 if (environ != PL_origenviron && !PL_use_safe_putenv
805 /* only main thread can free environ[0] contents */
806 && PL_curinterp == aTHX
812 for (i = 0; environ[i]; i++)
813 safesysfree(environ[i]);
815 /* Must use safesysfree() when working with environ. */
816 safesysfree(environ);
818 environ = PL_origenviron;
821 #endif /* !PERL_MICRO */
823 if (destruct_level == 0) {
825 DEBUG_P(debprofdump());
827 #if defined(PERLIO_LAYERS)
828 /* No more IO - including error messages ! */
829 PerlIO_cleanup(aTHX);
832 CopFILE_free(&PL_compiling);
833 CopSTASH_free(&PL_compiling);
835 /* The exit() function will do everything that needs doing. */
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_sawampersand = FALSE; /* must save all match strings */
877 Safefree(PL_inplace);
879 SvREFCNT_dec(PL_patchlevel);
880 SvREFCNT_dec(PL_apiversion);
883 SvREFCNT_dec(PL_e_script);
889 /* magical thingies */
891 SvREFCNT_dec(PL_ofsgv); /* *, */
894 SvREFCNT_dec(PL_ors_sv); /* $\ */
897 SvREFCNT_dec(PL_rs); /* $/ */
900 Safefree(PL_osname); /* $^O */
903 SvREFCNT_dec(PL_statname);
907 /* defgv, aka *_ should be taken care of elsewhere */
910 Safefree(PL_efloatbuf);
914 /* startup and shutdown function lists */
915 SvREFCNT_dec(PL_beginav);
916 SvREFCNT_dec(PL_beginav_save);
917 SvREFCNT_dec(PL_endav);
918 SvREFCNT_dec(PL_checkav);
919 SvREFCNT_dec(PL_checkav_save);
920 SvREFCNT_dec(PL_unitcheckav);
921 SvREFCNT_dec(PL_unitcheckav_save);
922 SvREFCNT_dec(PL_initav);
924 PL_beginav_save = NULL;
927 PL_checkav_save = NULL;
928 PL_unitcheckav = NULL;
929 PL_unitcheckav_save = NULL;
932 /* shortcuts just get cleared */
941 PL_last_in_gv = NULL;
953 SvREFCNT_dec(PL_argvout_stack);
954 PL_argvout_stack = NULL;
956 SvREFCNT_dec(PL_modglobal);
958 SvREFCNT_dec(PL_preambleav);
959 PL_preambleav = NULL;
960 SvREFCNT_dec(PL_subname);
962 #ifdef PERL_USES_PL_PIDSTATUS
963 SvREFCNT_dec(PL_pidstatus);
966 SvREFCNT_dec(PL_toptarget);
968 SvREFCNT_dec(PL_bodytarget);
969 PL_bodytarget = NULL;
970 PL_formtarget = NULL;
972 /* free locale stuff */
973 #ifdef USE_LOCALE_COLLATE
974 Safefree(PL_collation_name);
975 PL_collation_name = NULL;
978 #ifdef USE_LOCALE_NUMERIC
979 Safefree(PL_numeric_name);
980 PL_numeric_name = NULL;
981 SvREFCNT_dec(PL_numeric_radix_sv);
982 PL_numeric_radix_sv = NULL;
985 /* clear utf8 character classes */
986 SvREFCNT_dec(PL_utf8_alnum);
987 SvREFCNT_dec(PL_utf8_alpha);
988 SvREFCNT_dec(PL_utf8_space);
989 SvREFCNT_dec(PL_utf8_graph);
990 SvREFCNT_dec(PL_utf8_digit);
991 SvREFCNT_dec(PL_utf8_upper);
992 SvREFCNT_dec(PL_utf8_lower);
993 SvREFCNT_dec(PL_utf8_print);
994 SvREFCNT_dec(PL_utf8_punct);
995 SvREFCNT_dec(PL_utf8_xdigit);
996 SvREFCNT_dec(PL_utf8_mark);
997 SvREFCNT_dec(PL_utf8_toupper);
998 SvREFCNT_dec(PL_utf8_totitle);
999 SvREFCNT_dec(PL_utf8_tolower);
1000 SvREFCNT_dec(PL_utf8_tofold);
1001 SvREFCNT_dec(PL_utf8_idstart);
1002 SvREFCNT_dec(PL_utf8_idcont);
1003 SvREFCNT_dec(PL_utf8_foldclosures);
1004 PL_utf8_alnum = NULL;
1005 PL_utf8_alpha = NULL;
1006 PL_utf8_space = NULL;
1007 PL_utf8_graph = NULL;
1008 PL_utf8_digit = NULL;
1009 PL_utf8_upper = NULL;
1010 PL_utf8_lower = NULL;
1011 PL_utf8_print = NULL;
1012 PL_utf8_punct = NULL;
1013 PL_utf8_xdigit = NULL;
1014 PL_utf8_mark = NULL;
1015 PL_utf8_toupper = NULL;
1016 PL_utf8_totitle = NULL;
1017 PL_utf8_tolower = NULL;
1018 PL_utf8_tofold = NULL;
1019 PL_utf8_idstart = NULL;
1020 PL_utf8_idcont = NULL;
1021 PL_utf8_foldclosures = NULL;
1023 if (!specialWARN(PL_compiling.cop_warnings))
1024 PerlMemShared_free(PL_compiling.cop_warnings);
1025 PL_compiling.cop_warnings = NULL;
1026 cophh_free(CopHINTHASH_get(&PL_compiling));
1027 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1028 CopFILE_free(&PL_compiling);
1029 CopSTASH_free(&PL_compiling);
1031 /* Prepare to destruct main symbol table. */
1034 /* break ref loop *:: <=> %:: */
1035 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1038 SvREFCNT_dec(PL_curstname);
1039 PL_curstname = NULL;
1041 /* clear queued errors */
1042 SvREFCNT_dec(PL_errors);
1045 SvREFCNT_dec(PL_isarev);
1048 if (destruct_level >= 2) {
1049 if (PL_scopestack_ix != 0)
1050 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1051 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1052 (long)PL_scopestack_ix);
1053 if (PL_savestack_ix != 0)
1054 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1055 "Unbalanced saves: %ld more saves than restores\n",
1056 (long)PL_savestack_ix);
1057 if (PL_tmps_floor != -1)
1058 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1059 (long)PL_tmps_floor + 1);
1060 if (cxstack_ix != -1)
1061 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1062 (long)cxstack_ix + 1);
1065 #ifdef PERL_IMPLICIT_CONTEXT
1066 /* the entries in this list are allocated via SV PVX's, so get freed
1067 * in sv_clean_all */
1068 Safefree(PL_my_cxt_list);
1071 /* Now absolutely destruct everything, somehow or other, loops or no. */
1073 /* the 2 is for PL_fdpid and PL_strtab */
1074 while (sv_clean_all() > 2)
1077 AvREAL_off(PL_fdpid); /* no surviving entries */
1078 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1081 #ifdef HAVE_INTERP_INTERN
1085 /* Destruct the global string table. */
1087 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1088 * so that sv_free() won't fail on them.
1089 * Now that the global string table is using a single hunk of memory
1090 * for both HE and HEK, we either need to explicitly unshare it the
1091 * correct way, or actually free things here.
1094 const I32 max = HvMAX(PL_strtab);
1095 HE * const * const array = HvARRAY(PL_strtab);
1096 HE *hent = array[0];
1099 if (hent && ckWARN_d(WARN_INTERNAL)) {
1100 HE * const next = HeNEXT(hent);
1101 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1102 "Unbalanced string table refcount: (%ld) for \"%s\"",
1103 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1110 hent = array[riter];
1115 HvARRAY(PL_strtab) = 0;
1116 HvTOTALKEYS(PL_strtab) = 0;
1118 SvREFCNT_dec(PL_strtab);
1121 /* free the pointer tables used for cloning */
1122 ptr_table_free(PL_ptr_table);
1123 PL_ptr_table = (PTR_TBL_t*)NULL;
1126 /* free special SVs */
1128 SvREFCNT(&PL_sv_yes) = 0;
1129 sv_clear(&PL_sv_yes);
1130 SvANY(&PL_sv_yes) = NULL;
1131 SvFLAGS(&PL_sv_yes) = 0;
1133 SvREFCNT(&PL_sv_no) = 0;
1134 sv_clear(&PL_sv_no);
1135 SvANY(&PL_sv_no) = NULL;
1136 SvFLAGS(&PL_sv_no) = 0;
1140 for (i=0; i<=2; i++) {
1141 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1142 sv_clear(PERL_DEBUG_PAD(i));
1143 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1144 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1148 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1149 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1151 #ifdef DEBUG_LEAKING_SCALARS
1152 if (PL_sv_count != 0) {
1157 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1158 svend = &sva[SvREFCNT(sva)];
1159 for (sv = sva + 1; sv < svend; ++sv) {
1160 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1161 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1163 " refcnt=%"UVuf pTHX__FORMAT "\n"
1164 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1166 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1168 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1170 sv->sv_debug_inpad ? "for" : "by",
1171 sv->sv_debug_optype ?
1172 PL_op_name[sv->sv_debug_optype]: "(none)",
1173 PTR2UV(sv->sv_debug_parent),
1176 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1177 Perl_dump_sv_child(aTHX_ sv);
1183 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1187 /* Wait for up to 4 seconds for child to terminate.
1188 This seems to be the least effort way of timing out on reaping
1190 struct timeval waitfor = {4, 0};
1191 int sock = PL_dumper_fd;
1195 FD_SET(sock, &rset);
1196 select(sock + 1, &rset, NULL, NULL, &waitfor);
1197 waitpid(child, &status, WNOHANG);
1202 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1208 #ifdef PERL_DEBUG_READONLY_OPS
1214 #if defined(PERLIO_LAYERS)
1215 /* No more IO - including error messages ! */
1216 PerlIO_cleanup(aTHX);
1219 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1220 as currently layers use it rather than NULL as a marker
1221 for no arg - and will try and SvREFCNT_dec it.
1223 SvREFCNT(&PL_sv_undef) = 0;
1224 SvREADONLY_off(&PL_sv_undef);
1226 Safefree(PL_origfilename);
1227 PL_origfilename = NULL;
1228 Safefree(PL_reg_start_tmp);
1229 PL_reg_start_tmp = (char**)NULL;
1230 PL_reg_start_tmpl = 0;
1231 Safefree(PL_reg_curpm);
1232 Safefree(PL_reg_poscache);
1233 free_tied_hv_pool();
1234 Safefree(PL_op_mask);
1235 Safefree(PL_psig_name);
1236 PL_psig_name = (SV**)NULL;
1237 PL_psig_ptr = (SV**)NULL;
1239 /* We need to NULL PL_psig_pend first, so that
1240 signal handlers know not to use it */
1241 int *psig_save = PL_psig_pend;
1242 PL_psig_pend = (int*)NULL;
1243 Safefree(psig_save);
1247 PL_tainting = FALSE;
1248 PL_taint_warn = FALSE;
1249 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1252 DEBUG_P(debprofdump());
1254 #ifdef USE_REENTRANT_API
1255 Perl_reentrant_free(aTHX);
1260 while (PL_regmatch_slab) {
1261 regmatch_slab *s = PL_regmatch_slab;
1262 PL_regmatch_slab = PL_regmatch_slab->next;
1266 /* As the absolutely last thing, free the non-arena SV for mess() */
1269 /* we know that type == SVt_PVMG */
1271 /* it could have accumulated taint magic */
1274 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1275 moremagic = mg->mg_moremagic;
1276 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1278 Safefree(mg->mg_ptr);
1282 /* we know that type >= SVt_PV */
1283 SvPV_free(PL_mess_sv);
1284 Safefree(SvANY(PL_mess_sv));
1285 Safefree(PL_mess_sv);
1292 =for apidoc perl_free
1294 Releases a Perl interpreter. See L<perlembed>.
1304 PERL_ARGS_ASSERT_PERL_FREE;
1306 if (PL_veto_cleanup)
1309 #ifdef PERL_TRACK_MEMPOOL
1312 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1313 * value as we're probably hunting memory leaks then
1315 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
1316 if (!s || atoi(s) == 0) {
1317 const U32 old_debug = PL_debug;
1318 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1319 thread at thread exit. */
1321 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1322 "free this thread's memory\n");
1323 PL_debug &= ~ DEBUG_m_FLAG;
1325 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1326 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1327 PL_debug = old_debug;
1332 #if defined(WIN32) || defined(NETWARE)
1333 # if defined(PERL_IMPLICIT_SYS)
1336 void *host = nw_internal_host;
1338 void *host = w32_internal_host;
1340 PerlMem_free(aTHXx);
1342 nw_delete_internal_host(host);
1344 win32_delete_internal_host(host);
1348 PerlMem_free(aTHXx);
1351 PerlMem_free(aTHXx);
1355 #if defined(USE_ITHREADS)
1356 /* provide destructors to clean up the thread key when libperl is unloaded */
1357 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1359 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1360 #pragma fini "perl_fini"
1361 #elif defined(__sun) && !defined(__GNUC__)
1362 #pragma fini (perl_fini)
1366 #if defined(__GNUC__)
1367 __attribute__((destructor))
1372 if (PL_curinterp && !PL_veto_cleanup)
1377 #endif /* THREADS */
1380 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1383 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1384 PL_exitlist[PL_exitlistlen].fn = fn;
1385 PL_exitlist[PL_exitlistlen].ptr = ptr;
1390 S_set_caret_X(pTHX) {
1392 GV* tmpgv = gv_fetchpvs("\030", GV_ADD|GV_NOTQUAL, SVt_PV); /* $^X */
1394 SV *const caret_x = GvSV(tmpgv);
1396 sv_setpv(caret_x, os2_execname(aTHX));
1398 # ifdef USE_KERN_PROC_PATHNAME
1403 mib[2] = KERN_PROC_PATHNAME;
1406 if (sysctl(mib, 4, NULL, &size, NULL, 0) == 0
1407 && size > 0 && size < MAXPATHLEN * MAXPATHLEN) {
1408 sv_grow(caret_x, size);
1410 if (sysctl(mib, 4, SvPVX(caret_x), &size, NULL, 0) == 0
1412 SvPOK_only(caret_x);
1413 SvCUR_set(caret_x, size - 1);
1418 # elif defined(USE_NSGETEXECUTABLEPATH)
1420 uint32_t size = sizeof(buf);
1422 _NSGetExecutablePath(buf, &size);
1423 if (size < MAXPATHLEN * MAXPATHLEN) {
1424 sv_grow(caret_x, size);
1425 if (_NSGetExecutablePath(SvPVX(caret_x), &size) == 0) {
1426 char *const tidied = realpath(SvPVX(caret_x), NULL);
1428 sv_setpv(caret_x, tidied);
1431 SvPOK_only(caret_x);
1432 SvCUR_set(caret_x, size);
1437 # elif defined(HAS_PROCSELFEXE)
1438 char buf[MAXPATHLEN];
1439 int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
1441 /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
1442 includes a spurious NUL which will cause $^X to fail in system
1443 or backticks (this will prevent extensions from being built and
1444 many tests from working). readlink is not meant to add a NUL.
1445 Normal readlink works fine.
1447 if (len > 0 && buf[len-1] == '\0') {
1451 /* FreeBSD's implementation is acknowledged to be imperfect, sometimes
1452 returning the text "unknown" from the readlink rather than the path
1453 to the executable (or returning an error from the readlink). Any
1454 valid path has a '/' in it somewhere, so use that to validate the
1455 result. See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
1457 if (len > 0 && memchr(buf, '/', len)) {
1458 sv_setpvn(caret_x, buf, len);
1462 /* Fallback to this: */
1463 sv_setpv(caret_x, PL_origargv[0]);
1469 =for apidoc perl_parse
1471 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1476 #define SET_CURSTASH(newstash) \
1477 if (PL_curstash != newstash) { \
1478 SvREFCNT_dec(PL_curstash); \
1479 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1483 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1490 PERL_ARGS_ASSERT_PERL_PARSE;
1491 #ifndef MULTIPLICITY
1492 PERL_UNUSED_ARG(my_perl);
1495 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
1496 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
1497 * This MUST be done before any hash stores or fetches take place.
1498 * If you set PL_rehash_seed (and presumably also PL_rehash_seed_set)
1499 * yourself, it is your responsibility to provide a good random seed!
1500 * You can also define PERL_HASH_SEED in compile time, see hv.h. */
1501 if (!PL_rehash_seed_set)
1502 PL_rehash_seed = get_hash_seed();
1504 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1506 if (s && (atoi(s) == 1))
1507 PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed);
1509 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1514 if (PL_origalen != 0) {
1515 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1518 /* Set PL_origalen be the sum of the contiguous argv[]
1519 * elements plus the size of the env in case that it is
1520 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1521 * as the maximum modifiable length of $0. In the worst case
1522 * the area we are able to modify is limited to the size of
1523 * the original argv[0]. (See below for 'contiguous', though.)
1525 const char *s = NULL;
1528 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1529 /* Do the mask check only if the args seem like aligned. */
1531 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1533 /* See if all the arguments are contiguous in memory. Note
1534 * that 'contiguous' is a loose term because some platforms
1535 * align the argv[] and the envp[]. If the arguments look
1536 * like non-aligned, assume that they are 'strictly' or
1537 * 'traditionally' contiguous. If the arguments look like
1538 * aligned, we just check that they are within aligned
1539 * PTRSIZE bytes. As long as no system has something bizarre
1540 * like the argv[] interleaved with some other data, we are
1541 * fine. (Did I just evoke Murphy's Law?) --jhi */
1542 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1544 for (i = 1; i < PL_origargc; i++) {
1545 if ((PL_origargv[i] == s + 1
1547 || PL_origargv[i] == s + 2
1552 (PL_origargv[i] > s &&
1554 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1565 #ifndef PERL_USE_SAFE_PUTENV
1566 /* Can we grab env area too to be used as the area for $0? */
1567 if (s && PL_origenviron && !PL_use_safe_putenv) {
1568 if ((PL_origenviron[0] == s + 1)
1571 (PL_origenviron[0] > s &&
1572 PL_origenviron[0] <=
1573 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1576 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1577 s = PL_origenviron[0];
1580 my_setenv("NoNe SuCh", NULL);
1581 /* Force copy of environment. */
1582 for (i = 1; PL_origenviron[i]; i++) {
1583 if (PL_origenviron[i] == s + 1
1586 (PL_origenviron[i] > s &&
1587 PL_origenviron[i] <=
1588 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1591 s = PL_origenviron[i];
1599 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1601 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1606 /* Come here if running an undumped a.out. */
1608 PL_origfilename = savepv(argv[0]);
1609 PL_do_undump = FALSE;
1610 cxstack_ix = -1; /* start label stack again */
1612 assert (!PL_tainted);
1614 S_set_caret_X(aTHX);
1616 init_postdump_symbols(argc,argv,env);
1621 op_free(PL_main_root);
1622 PL_main_root = NULL;
1624 PL_main_start = NULL;
1625 SvREFCNT_dec(PL_main_cv);
1629 oldscope = PL_scopestack_ix;
1630 PL_dowarn = G_WARN_OFF;
1635 parse_body(env,xsinit);
1636 if (PL_unitcheckav) {
1637 call_list(oldscope, PL_unitcheckav);
1640 PERL_SET_PHASE(PERL_PHASE_CHECK);
1641 call_list(oldscope, PL_checkav);
1649 /* my_exit() was called */
1650 while (PL_scopestack_ix > oldscope)
1653 SET_CURSTASH(PL_defstash);
1654 if (PL_unitcheckav) {
1655 call_list(oldscope, PL_unitcheckav);
1658 PERL_SET_PHASE(PERL_PHASE_CHECK);
1659 call_list(oldscope, PL_checkav);
1664 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1672 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1673 miniperl, and we need to see those flags reflected in the values here. */
1675 /* What this returns is subject to change. Use the public interface in Config.
1678 S_Internals_V(pTHX_ CV *cv)
1681 #ifdef LOCAL_PATCH_COUNT
1682 const int local_patch_count = LOCAL_PATCH_COUNT;
1684 const int local_patch_count = 0;
1686 const int entries = 3 + local_patch_count;
1688 static char non_bincompat_options[] =
1695 # ifdef PERL_DISABLE_PMC
1698 # ifdef PERL_DONT_CREATE_GVSV
1699 " PERL_DONT_CREATE_GVSV"
1701 # ifdef PERL_EXTERNAL_GLOB
1702 " PERL_EXTERNAL_GLOB"
1704 # ifdef PERL_IS_MINIPERL
1707 # ifdef PERL_MALLOC_WRAP
1710 # ifdef PERL_MEM_LOG
1713 # ifdef PERL_MEM_LOG_NOIMPL
1714 " PERL_MEM_LOG_NOIMPL"
1716 # ifdef PERL_PRESERVE_IVUV
1717 " PERL_PRESERVE_IVUV"
1719 # ifdef PERL_RELOCATABLE_INCPUSH
1720 " PERL_RELOCATABLE_INCPUSH"
1722 # ifdef PERL_USE_DEVEL
1725 # ifdef PERL_USE_SAFE_PUTENV
1726 " PERL_USE_SAFE_PUTENV"
1728 # ifdef UNLINK_ALL_VERSIONS
1729 " UNLINK_ALL_VERSIONS"
1731 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1732 " USE_ATTRIBUTES_FOR_PERLIO"
1734 # ifdef USE_FAST_STDIO
1740 # ifdef USE_LOCALE_CTYPE
1743 # ifdef USE_PERL_ATOF
1746 # ifdef USE_SITECUSTOMIZE
1747 " USE_SITECUSTOMIZE"
1750 PERL_UNUSED_ARG(cv);
1751 PERL_UNUSED_ARG(items);
1753 EXTEND(SP, entries);
1755 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1756 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1757 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1761 PUSHs(Perl_newSVpvn_flags(aTHX_
1762 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1765 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1769 PUSHs(&PL_sv_undef);
1772 for (i = 1; i <= local_patch_count; i++) {
1773 /* This will be an undef, if PL_localpatches[i] is NULL. */
1774 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1780 #define INCPUSH_UNSHIFT 0x01
1781 #define INCPUSH_ADD_OLD_VERS 0x02
1782 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1783 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1784 #define INCPUSH_NOT_BASEDIR 0x10
1785 #define INCPUSH_CAN_RELOCATE 0x20
1786 #define INCPUSH_ADD_SUB_DIRS \
1787 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1790 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1794 int argc = PL_origargc;
1795 char **argv = PL_origargv;
1796 const char *scriptname = NULL;
1797 VOL bool dosearch = FALSE;
1799 bool doextract = FALSE;
1800 const char *cddir = NULL;
1801 #ifdef USE_SITECUSTOMIZE
1802 bool minus_f = FALSE;
1804 SV *linestr_sv = newSV_type(SVt_PVIV);
1805 bool add_read_e_script = FALSE;
1807 PERL_SET_PHASE(PERL_PHASE_START);
1809 SvGROW(linestr_sv, 80);
1810 sv_setpvs(linestr_sv,"");
1816 for (argc--,argv++; argc > 0; argc--,argv++) {
1817 if (argv[0][0] != '-' || !argv[0][1])
1823 #ifndef PERL_STRICT_CR
1847 if ((s = moreswitches(s)))
1852 CHECK_MALLOC_TOO_LATE_FOR('t');
1853 if( !PL_tainting ) {
1854 PL_taint_warn = TRUE;
1860 CHECK_MALLOC_TOO_LATE_FOR('T');
1862 PL_taint_warn = FALSE;
1870 forbid_setid('e', FALSE);
1872 PL_e_script = newSVpvs("");
1873 add_read_e_script = TRUE;
1876 sv_catpv(PL_e_script, s);
1878 sv_catpv(PL_e_script, argv[1]);
1882 Perl_croak(aTHX_ "No code specified for -%c", c);
1883 sv_catpvs(PL_e_script, "\n");
1887 #ifdef USE_SITECUSTOMIZE
1893 case 'I': /* -I handled both here and in moreswitches() */
1894 forbid_setid('I', FALSE);
1895 if (!*++s && (s=argv[1]) != NULL) {
1899 STRLEN len = strlen(s);
1900 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1903 Perl_croak(aTHX_ "No directory specified for -I");
1906 forbid_setid('S', FALSE);
1915 opts_prog = newSVpvs("use Config; Config::_V()");
1919 opts_prog = Perl_newSVpvf(aTHX_
1920 "use Config; Config::config_vars(qw%c%s%c)",
1924 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1925 /* don't look for script or read stdin */
1926 scriptname = BIT_BUCKET;
1938 if (!*++s || isSPACE(*s)) {
1942 /* catch use of gnu style long options.
1943 Both of these exit immediately. */
1944 if (strEQ(s, "version"))
1946 if (strEQ(s, "help"))
1951 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1962 #ifndef SECURE_INTERNAL_GETENV
1965 (s = PerlEnv_getenv("PERL5OPT")))
1969 if (*s == '-' && *(s+1) == 'T') {
1970 CHECK_MALLOC_TOO_LATE_FOR('T');
1972 PL_taint_warn = FALSE;
1975 char *popt_copy = NULL;
1988 if (!strchr("CDIMUdmtwW", *s))
1989 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
1993 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
1994 s = popt_copy + (s - d);
2002 if( !PL_tainting ) {
2003 PL_taint_warn = TRUE;
2014 /* Set $^X early so that it can be used for relocatable paths in @INC */
2015 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2016 assert (!PL_tainted);
2018 S_set_caret_X(aTHX);
2021 #if defined(USE_SITECUSTOMIZE)
2023 /* The games with local $! are to avoid setting errno if there is no
2024 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2025 ie a q() operator with a NUL byte as a the delimiter. This avoids
2026 problems with pathnames containing (say) ' */
2027 # ifdef PERL_IS_MINIPERL
2028 AV *const inc = GvAV(PL_incgv);
2029 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2032 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2034 "BEGIN { do {local $!; -f q%c%"SVf"/buildcustomize.pl%c} && do q%c%"SVf"/buildcustomize.pl%c }",
2039 /* SITELIB_EXP is a function call on Win32. */
2040 const char *const raw_sitelib = SITELIB_EXP;
2041 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2042 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2043 INCPUSH_CAN_RELOCATE);
2044 const char *const sitelib = SvPVX(sitelib_sv);
2045 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2047 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2050 assert (SvREFCNT(sitelib_sv) == 1);
2051 SvREFCNT_dec(sitelib_sv);
2057 scriptname = argv[0];
2060 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2062 else if (scriptname == NULL) {
2064 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2070 assert (!PL_tainted);
2074 bool suidscript = FALSE;
2076 rsfp = open_script(scriptname, dosearch, &suidscript);
2078 rsfp = PerlIO_stdin();
2081 validate_suid(validarg, scriptname, fdscript, suidscript,
2085 # if defined(SIGCHLD) || defined(SIGCLD)
2088 # define SIGCHLD SIGCLD
2090 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2091 if (sigstate == (Sighandler_t) SIG_IGN) {
2092 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2093 "Can't ignore signal CHLD, forcing to default");
2094 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2102 /* This will croak if suidscript is true, as -x cannot be used with
2104 forbid_setid('x', suidscript);
2105 /* Hence you can't get here if suidscript is true */
2107 find_beginning(linestr_sv, rsfp);
2108 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2109 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2113 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2114 CvUNIQUE_on(PL_compcv);
2116 CvPADLIST(PL_compcv) = pad_new(0);
2118 PL_isarev = newHV();
2121 boot_core_UNIVERSAL();
2123 newXS("Internals::V", S_Internals_V, __FILE__);
2126 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2128 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2134 # ifdef HAS_SOCKS5_INIT
2135 socks5_init(argv[0]);
2141 init_predump_symbols();
2142 /* init_postdump_symbols not currently designed to be called */
2143 /* more than once (ENV isn't cleared first, for example) */
2144 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2146 init_postdump_symbols(argc,argv,env);
2148 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2149 * or explicitly in some platforms.
2150 * locale.c:Perl_init_i18nl10n() if the environment
2151 * look like the user wants to use UTF-8. */
2152 #if defined(__SYMBIAN32__)
2153 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2155 # ifndef PERL_IS_MINIPERL
2157 /* Requires init_predump_symbols(). */
2158 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2163 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2164 * and the default open disciplines. */
2165 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2166 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2168 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2169 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2170 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2172 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2173 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2174 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2176 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2177 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2178 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2180 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2181 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2184 sv_setpvs(sv, ":utf8\0:utf8");
2186 sv_setpvs(sv, ":utf8\0");
2189 sv_setpvs(sv, "\0:utf8");
2198 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2199 if (strEQ(s, "unsafe"))
2200 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2201 else if (strEQ(s, "safe"))
2202 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2204 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2211 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2215 PL_xmlfp = PerlIO_stdout();
2217 PL_xmlfp = PerlIO_open(s, "w");
2219 Perl_croak(aTHX_ "Can't open %s", s);
2221 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2227 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2228 PL_madskills = atoi(s);
2229 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2234 lex_start(linestr_sv, rsfp, 0);
2235 PL_subname = newSVpvs("main");
2237 if (add_read_e_script)
2238 filter_add(read_e_script, NULL);
2240 /* now parse the script */
2242 SETERRNO(0,SS_NORMAL);
2243 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2245 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2247 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2251 CopLINE_set(PL_curcop, 0);
2252 SET_CURSTASH(PL_defstash);
2254 SvREFCNT_dec(PL_e_script);
2262 SAVECOPFILE(PL_curcop);
2263 SAVECOPLINE(PL_curcop);
2264 gv_check(PL_defstash);
2273 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2274 dump_mstats("after compilation:");
2279 PL_restartjmpenv = NULL;
2285 =for apidoc perl_run
2287 Tells a Perl interpreter to run. See L<perlembed>.
2300 PERL_ARGS_ASSERT_PERL_RUN;
2301 #ifndef MULTIPLICITY
2302 PERL_UNUSED_ARG(my_perl);
2305 oldscope = PL_scopestack_ix;
2313 cxstack_ix = -1; /* start context stack again */
2315 case 0: /* normal completion */
2319 case 2: /* my_exit() */
2320 while (PL_scopestack_ix > oldscope)
2323 SET_CURSTASH(PL_defstash);
2324 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2325 PL_endav && !PL_minus_c) {
2326 PERL_SET_PHASE(PERL_PHASE_END);
2327 call_list(oldscope, PL_endav);
2330 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2331 dump_mstats("after execution: ");
2337 POPSTACK_TO(PL_mainstack);
2340 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2351 S_run_body(pTHX_ I32 oldscope)
2354 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2355 PL_sawampersand ? "Enabling" : "Omitting"));
2357 if (!PL_restartop) {
2361 exit(0); /* less likely to core dump than my_exit(0) */
2365 if (DEBUG_x_TEST || DEBUG_B_TEST)
2366 dump_all_perl(!DEBUG_B_TEST);
2368 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2372 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2375 if (PERLDB_SINGLE && PL_DBsingle)
2376 sv_setiv(PL_DBsingle, 1);
2378 PERL_SET_PHASE(PERL_PHASE_INIT);
2379 call_list(oldscope, PL_initav);
2381 #ifdef PERL_DEBUG_READONLY_OPS
2382 Perl_pending_Slabs_to_ro(aTHX);
2388 PERL_SET_PHASE(PERL_PHASE_RUN);
2391 PL_restartjmpenv = NULL;
2392 PL_op = PL_restartop;
2396 else if (PL_main_start) {
2397 CvDEPTH(PL_main_cv) = 1;
2398 PL_op = PL_main_start;
2406 =head1 SV Manipulation Functions
2408 =for apidoc p||get_sv
2410 Returns the SV of the specified Perl scalar. C<flags> are passed to
2411 C<gv_fetchpv>. If C<GV_ADD> is set and the
2412 Perl variable does not exist then it will be created. If C<flags> is zero
2413 and the variable does not exist then NULL is returned.
2419 Perl_get_sv(pTHX_ const char *name, I32 flags)
2423 PERL_ARGS_ASSERT_GET_SV;
2425 gv = gv_fetchpv(name, flags, SVt_PV);
2432 =head1 Array Manipulation Functions
2434 =for apidoc p||get_av
2436 Returns the AV of the specified Perl global or package array with the given
2437 name (so it won't work on lexical variables). C<flags> are passed
2438 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2439 Perl variable does not exist then it will be created. If C<flags> is zero
2440 and the variable does not exist then NULL is returned.
2442 Perl equivalent: C<@{"$name"}>.
2448 Perl_get_av(pTHX_ const char *name, I32 flags)
2450 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2452 PERL_ARGS_ASSERT_GET_AV;
2462 =head1 Hash Manipulation Functions
2464 =for apidoc p||get_hv
2466 Returns the HV of the specified Perl hash. C<flags> are passed to
2467 C<gv_fetchpv>. If C<GV_ADD> is set and the
2468 Perl variable does not exist then it will be created. If C<flags> is zero
2469 and the variable does not exist then NULL is returned.
2475 Perl_get_hv(pTHX_ const char *name, I32 flags)
2477 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2479 PERL_ARGS_ASSERT_GET_HV;
2489 =head1 CV Manipulation Functions
2491 =for apidoc p||get_cvn_flags
2493 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2494 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2495 exist then it will be declared (which has the same effect as saying
2496 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2497 then NULL is returned.
2499 =for apidoc p||get_cv
2501 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2507 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2509 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2510 /* XXX this is probably not what they think they're getting.
2511 * It has the same effect as "sub name;", i.e. just a forward
2514 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2516 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2517 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2518 return newSUB(start_subparse(FALSE, 0),
2519 newSVOP(OP_CONST, 0, sv),
2527 /* Nothing in core calls this now, but we can't replace it with a macro and
2528 move it to mathoms.c as a macro would evaluate name twice. */
2530 Perl_get_cv(pTHX_ const char *name, I32 flags)
2532 PERL_ARGS_ASSERT_GET_CV;
2534 return get_cvn_flags(name, strlen(name), flags);
2537 /* Be sure to refetch the stack pointer after calling these routines. */
2541 =head1 Callback Functions
2543 =for apidoc p||call_argv
2545 Performs a callback to the specified named and package-scoped Perl subroutine
2546 with C<argv> (a NULL-terminated array of strings) as arguments. See L<perlcall>.
2548 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2554 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2556 /* See G_* flags in cop.h */
2557 /* null terminated arg list */
2562 PERL_ARGS_ASSERT_CALL_ARGV;
2567 mXPUSHs(newSVpv(*argv,0));
2572 return call_pv(sub_name, flags);
2576 =for apidoc p||call_pv
2578 Performs a callback to the specified Perl sub. See L<perlcall>.
2584 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2585 /* name of the subroutine */
2586 /* See G_* flags in cop.h */
2588 PERL_ARGS_ASSERT_CALL_PV;
2590 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2594 =for apidoc p||call_method
2596 Performs a callback to the specified Perl method. The blessed object must
2597 be on the stack. See L<perlcall>.
2603 Perl_call_method(pTHX_ const char *methname, I32 flags)
2604 /* name of the subroutine */
2605 /* See G_* flags in cop.h */
2608 PERL_ARGS_ASSERT_CALL_METHOD;
2610 len = strlen(methname);
2612 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2613 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2616 /* May be called with any of a CV, a GV, or an SV containing the name. */
2618 =for apidoc p||call_sv
2620 Performs a callback to the Perl sub whose name is in the SV. See
2627 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2628 /* See G_* flags in cop.h */
2631 LOGOP myop; /* fake syntax tree node */
2636 bool oldcatch = CATCH_GET;
2638 OP* const oldop = PL_op;
2641 PERL_ARGS_ASSERT_CALL_SV;
2643 if (flags & G_DISCARD) {
2647 if (!(flags & G_WANT)) {
2648 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2653 Zero(&myop, 1, LOGOP);
2654 myop.op_next = NULL;
2655 if (!(flags & G_NOARGS))
2656 myop.op_flags |= OPf_STACKED;
2657 myop.op_flags |= OP_GIMME_REVERSE(flags);
2661 EXTEND(PL_stack_sp, 1);
2662 *++PL_stack_sp = sv;
2664 oldscope = PL_scopestack_ix;
2666 if (PERLDB_SUB && PL_curstash != PL_debstash
2667 /* Handle first BEGIN of -d. */
2668 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2669 /* Try harder, since this may have been a sighandler, thus
2670 * curstash may be meaningless. */
2671 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2672 && !(flags & G_NODEBUG))
2673 PL_op->op_private |= OPpENTERSUB_DB;
2675 if (flags & G_METHOD) {
2676 Zero(&method_op, 1, UNOP);
2677 method_op.op_next = PL_op;
2678 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2679 method_op.op_type = OP_METHOD;
2680 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2681 myop.op_type = OP_ENTERSUB;
2682 PL_op = (OP*)&method_op;
2685 if (!(flags & G_EVAL)) {
2687 CALL_BODY_SUB((OP*)&myop);
2688 retval = PL_stack_sp - (PL_stack_base + oldmark);
2689 CATCH_SET(oldcatch);
2692 myop.op_other = (OP*)&myop;
2694 create_eval_scope(flags|G_FAKINGEVAL);
2702 CALL_BODY_SUB((OP*)&myop);
2703 retval = PL_stack_sp - (PL_stack_base + oldmark);
2704 if (!(flags & G_KEEPERR)) {
2712 /* my_exit() was called */
2713 SET_CURSTASH(PL_defstash);
2720 PL_restartjmpenv = NULL;
2721 PL_op = PL_restartop;
2725 PL_stack_sp = PL_stack_base + oldmark;
2726 if ((flags & G_WANT) == G_ARRAY)
2730 *++PL_stack_sp = &PL_sv_undef;
2735 if (PL_scopestack_ix > oldscope)
2736 delete_eval_scope();
2740 if (flags & G_DISCARD) {
2741 PL_stack_sp = PL_stack_base + oldmark;
2750 /* Eval a string. The G_EVAL flag is always assumed. */
2753 =for apidoc p||eval_sv
2755 Tells Perl to C<eval> the string in the SV. It supports the same flags
2756 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2762 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2764 /* See G_* flags in cop.h */
2768 UNOP myop; /* fake syntax tree node */
2769 VOL I32 oldmark = SP - PL_stack_base;
2772 OP* const oldop = PL_op;
2775 PERL_ARGS_ASSERT_EVAL_SV;
2777 if (flags & G_DISCARD) {
2784 Zero(PL_op, 1, UNOP);
2785 EXTEND(PL_stack_sp, 1);
2786 *++PL_stack_sp = sv;
2788 if (!(flags & G_NOARGS))
2789 myop.op_flags = OPf_STACKED;
2790 myop.op_next = NULL;
2791 myop.op_type = OP_ENTEREVAL;
2792 myop.op_flags |= OP_GIMME_REVERSE(flags);
2793 if (flags & G_KEEPERR)
2794 myop.op_flags |= OPf_SPECIAL;
2796 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2797 * before a PUSHEVAL, which corrupts the stack after a croak */
2798 TAINT_PROPER("eval_sv()");
2804 if (PL_op == (OP*)(&myop)) {
2805 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2807 goto fail; /* failed in compilation */
2810 retval = PL_stack_sp - (PL_stack_base + oldmark);
2811 if (!(flags & G_KEEPERR)) {
2819 /* my_exit() was called */
2820 SET_CURSTASH(PL_defstash);
2827 PL_restartjmpenv = NULL;
2828 PL_op = PL_restartop;
2833 PL_stack_sp = PL_stack_base + oldmark;
2834 if ((flags & G_WANT) == G_ARRAY)
2838 *++PL_stack_sp = &PL_sv_undef;
2844 if (flags & G_DISCARD) {
2845 PL_stack_sp = PL_stack_base + oldmark;
2855 =for apidoc p||eval_pv
2857 Tells Perl to C<eval> the given string and return an SV* result.
2863 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2867 SV* sv = newSVpv(p, 0);
2869 PERL_ARGS_ASSERT_EVAL_PV;
2871 eval_sv(sv, G_SCALAR);
2878 if (croak_on_error && SvTRUE(ERRSV)) {
2879 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2885 /* Require a module. */
2888 =head1 Embedding Functions
2890 =for apidoc p||require_pv
2892 Tells Perl to C<require> the file named by the string argument. It is
2893 analogous to the Perl code C<eval "require '$file'">. It's even
2894 implemented that way; consider using load_module instead.
2899 Perl_require_pv(pTHX_ const char *pv)
2905 PERL_ARGS_ASSERT_REQUIRE_PV;
2907 PUSHSTACKi(PERLSI_REQUIRE);
2909 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2910 eval_sv(sv_2mortal(sv), G_DISCARD);
2916 S_usage(pTHX) /* XXX move this out into a module ? */
2918 /* This message really ought to be max 23 lines.
2919 * Removed -h because the user already knows that option. Others? */
2921 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2922 minimum of 509 character string literals. */
2923 static const char * const usage_msg[] = {
2924 " -0[octal] specify record separator (\\0, if no argument)\n"
2925 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2926 " -C[number/list] enables the listed Unicode features\n"
2927 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2928 " -d[:debugger] run program under debugger\n"
2929 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2930 " -e program one line of program (several -e's allowed, omit programfile)\n"
2931 " -E program like -e, but enables all optional features\n"
2932 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2933 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2934 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2935 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2936 " -l[octal] enable line ending processing, specifies line terminator\n"
2937 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2938 " -n assume \"while (<>) { ... }\" loop around program\n"
2939 " -p assume loop like -n but print line also, like sed\n"
2940 " -s enable rudimentary parsing for switches after programfile\n"
2941 " -S look for programfile using PATH environment variable\n",
2942 " -t enable tainting warnings\n"
2943 " -T enable tainting checks\n"
2944 " -u dump core after parsing program\n"
2945 " -U allow unsafe operations\n"
2946 " -v print version, patchlevel and license\n"
2947 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2948 " -w enable many useful warnings\n"
2949 " -W enable all warnings\n"
2950 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2951 " -X disable all warnings\n"
2953 "Run 'perldoc perl' for more help with Perl.\n\n",
2956 const char * const *p = usage_msg;
2957 PerlIO *out = PerlIO_stdout();
2960 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2963 PerlIO_puts(out, *p++);
2967 /* convert a string of -D options (or digits) into an int.
2968 * sets *s to point to the char after the options */
2972 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2974 static const char * const usage_msgd[] = {
2975 " Debugging flag values: (see also -d)\n"
2976 " p Tokenizing and parsing (with v, displays parse stack)\n"
2977 " s Stack snapshots (with v, displays all stacks)\n"
2978 " l Context (loop) stack processing\n"
2979 " t Trace execution\n"
2980 " o Method and overloading resolution\n",
2981 " c String/numeric conversions\n"
2982 " P Print profiling info, source file input state\n"
2983 " m Memory and SV allocation\n"
2984 " f Format processing\n"
2985 " r Regular expression parsing and execution\n"
2986 " x Syntax tree dump\n",
2987 " u Tainting checks\n"
2988 " H Hash dump -- usurps values()\n"
2989 " X Scratchpad allocation\n"
2992 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2993 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2994 " v Verbose: use in conjunction with other flags\n"
2995 " C Copy On Write\n"
2996 " A Consistency checks on internal structures\n"
2997 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2998 " M trace smart match resolution\n"
2999 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3004 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3007 /* if adding extra options, remember to update DEBUG_MASK */
3008 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
3010 for (; isALNUM(**s); (*s)++) {
3011 const char * const d = strchr(debopts,**s);
3013 i |= 1 << (d - debopts);
3014 else if (ckWARN_d(WARN_DEBUGGING))
3015 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3016 "invalid option -D%c, use -D'' to see choices\n", **s);
3019 else if (isDIGIT(**s)) {
3021 for (; isALNUM(**s); (*s)++) ;
3023 else if (givehelp) {
3024 const char *const *p = usage_msgd;
3025 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3028 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3029 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3030 "-Dp not implemented on this platform\n");
3036 /* This routine handles any switches that can be given during run */
3039 Perl_moreswitches(pTHX_ const char *s)
3043 const char option = *s; /* used to remember option in -m/-M code */
3045 PERL_ARGS_ASSERT_MORESWITCHES;
3053 SvREFCNT_dec(PL_rs);
3054 if (s[1] == 'x' && s[2]) {
3055 const char *e = s+=2;
3061 flags = PERL_SCAN_SILENT_ILLDIGIT;
3062 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3063 if (s + numlen < e) {
3064 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3068 PL_rs = newSVpvs("");
3069 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3070 tmps = (U8*)SvPVX(PL_rs);
3071 uvchr_to_utf8(tmps, rschar);
3072 SvCUR_set(PL_rs, UNISKIP(rschar));
3077 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3078 if (rschar & ~((U8)~0))
3079 PL_rs = &PL_sv_undef;
3080 else if (!rschar && numlen >= 2)
3081 PL_rs = newSVpvs("");
3083 char ch = (char)rschar;
3084 PL_rs = newSVpvn(&ch, 1);
3087 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3092 PL_unicode = parse_unicode_opts( (const char **)&s );
3093 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3099 while (*s && !isSPACE(*s)) ++s;
3100 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3111 forbid_setid('d', FALSE);
3114 /* -dt indicates to the debugger that threads will be used */
3115 if (*s == 't' && !isALNUM(s[1])) {
3117 my_setenv("PERL5DB_THREADED", "1");
3120 /* The following permits -d:Mod to accepts arguments following an =
3121 in the fashion that -MSome::Mod does. */
3122 if (*s == ':' || *s == '=') {
3129 sv = newSVpvs("no Devel::");
3131 sv = newSVpvs("use Devel::");
3135 end = s + strlen(s);
3137 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3138 while(isALNUM(*s) || *s==':') ++s;
3140 sv_catpvn(sv, start, end - start);
3142 sv_catpvn(sv, start, s-start);
3143 /* Don't use NUL as q// delimiter here, this string goes in the
3145 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3148 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3152 PL_perldb = PERLDB_ALL;
3159 forbid_setid('D', FALSE);
3161 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3162 #else /* !DEBUGGING */
3163 if (ckWARN_d(WARN_DEBUGGING))
3164 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3165 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3166 for (s++; isALNUM(*s); s++) ;
3173 Safefree(PL_inplace);
3174 #if defined(__CYGWIN__) /* do backup extension automagically */
3175 if (*(s+1) == '\0') {
3176 PL_inplace = savepvs(".bak");
3179 #endif /* __CYGWIN__ */
3181 const char * const start = ++s;
3182 while (*s && !isSPACE(*s))
3185 PL_inplace = savepvn(start, s - start);
3189 if (*s == '-') /* Additional switches on #! line. */
3193 case 'I': /* -I handled both here and in parse_body() */
3194 forbid_setid('I', FALSE);
3196 while (*s && isSPACE(*s))
3201 /* ignore trailing spaces (possibly followed by other switches) */
3203 for (e = p; *e && !isSPACE(*e); e++) ;
3207 } while (*p && *p != '-');
3209 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3215 Perl_croak(aTHX_ "No directory specified for -I");
3221 SvREFCNT_dec(PL_ors_sv);
3227 PL_ors_sv = newSVpvs("\n");
3228 numlen = 3 + (*s == '0');
3229 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3233 if (RsPARA(PL_rs)) {
3234 PL_ors_sv = newSVpvs("\n\n");
3237 PL_ors_sv = newSVsv(PL_rs);
3242 forbid_setid('M', FALSE); /* XXX ? */
3245 forbid_setid('m', FALSE); /* XXX ? */
3250 const char *use = "use ";
3252 /* -M-foo == 'no foo' */
3253 /* Leading space on " no " is deliberate, to make both
3254 possibilities the same length. */
3255 if (*s == '-') { use = " no "; ++s; }
3256 sv = newSVpvn(use,4);
3258 /* We allow -M'Module qw(Foo Bar)' */
3259 while(isALNUM(*s) || *s==':') {
3268 Perl_croak(aTHX_ "Module name required with -%c option",
3271 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3272 "contains single ':'",
3273 (int)(s - start), start, option);
3274 end = s + strlen(s);
3276 sv_catpvn(sv, start, end - start);
3277 if (option == 'm') {
3279 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3280 sv_catpvs( sv, " ()");
3283 sv_catpvn(sv, start, s-start);
3284 /* Use NUL as q''-delimiter. */
3285 sv_catpvs(sv, " split(/,/,q\0");
3287 sv_catpvn(sv, s, end - s);
3288 sv_catpvs(sv, "\0)");
3291 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3294 Perl_croak(aTHX_ "Missing argument to -%c", option);
3305 forbid_setid('s', FALSE);
3306 PL_doswitches = TRUE;
3316 PL_do_undump = TRUE;
3326 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3327 PL_dowarn |= G_WARN_ON;
3332 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3333 if (!specialWARN(PL_compiling.cop_warnings))
3334 PerlMemShared_free(PL_compiling.cop_warnings);
3335 PL_compiling.cop_warnings = pWARN_ALL ;
3339 PL_dowarn = G_WARN_ALL_OFF;
3340 if (!specialWARN(PL_compiling.cop_warnings))
3341 PerlMemShared_free(PL_compiling.cop_warnings);
3342 PL_compiling.cop_warnings = pWARN_NONE ;
3349 if (s[0] == '-') /* Additional switches on #! line. */
3354 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3360 #ifdef ALTERNATE_SHEBANG
3361 case 'S': /* OS/2 needs -S on "extproc" line. */
3364 case 'e': case 'f': case 'x': case 'E':
3365 #ifndef ALTERNATE_SHEBANG
3369 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3372 "Unrecognized switch: -%.1s (-h will show valid options)",s
3382 if (!sv_derived_from(PL_patchlevel, "version"))
3383 upg_version(PL_patchlevel, TRUE);
3386 SV* level= vstringify(PL_patchlevel);
3387 #ifdef PERL_PATCHNUM
3388 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3389 SV *num = newSVpvs(PERL_PATCHNUM "*");
3391 SV *num = newSVpvs(PERL_PATCHNUM);
3394 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3395 SvREFCNT_dec(level);
3398 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3402 PerlIO_printf(PerlIO_stdout(),
3403 "\nThis is perl " STRINGIFY(PERL_REVISION)
3404 ", version " STRINGIFY(PERL_VERSION)
3405 ", subversion " STRINGIFY(PERL_SUBVERSION)
3406 " (%"SVf") built for " ARCHNAME, level
3408 SvREFCNT_dec(level);
3411 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3412 PerlIO_printf(PerlIO_stdout(),
3413 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3414 SVfARG(vstringify(PL_patchlevel))));
3415 PerlIO_printf(PerlIO_stdout(),
3416 Perl_form(aTHX_ " built under %s at %s %s\n",
3417 OSNAME, __DATE__, __TIME__));
3418 PerlIO_printf(PerlIO_stdout(),
3419 Perl_form(aTHX_ " OS Specific Release: %s\n",
3422 #if defined(LOCAL_PATCH_COUNT)
3423 if (LOCAL_PATCH_COUNT > 0)
3424 PerlIO_printf(PerlIO_stdout(),
3425 "\n(with %d registered patch%s, "
3426 "see perl -V for more detail)",
3428 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3431 PerlIO_printf(PerlIO_stdout(),
3432 "\n\nCopyright 1987-2012, Larry Wall\n");
3434 PerlIO_printf(PerlIO_stdout(),
3435 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3438 PerlIO_printf(PerlIO_stdout(),
3439 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3440 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3443 PerlIO_printf(PerlIO_stdout(),
3444 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3445 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3448 PerlIO_printf(PerlIO_stdout(),
3449 "atariST series port, ++jrb bammi@cadence.com\n");
3452 PerlIO_printf(PerlIO_stdout(),
3453 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3456 PerlIO_printf(PerlIO_stdout(),
3457 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3460 PerlIO_printf(PerlIO_stdout(),
3461 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3464 PerlIO_printf(PerlIO_stdout(),
3465 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3468 PerlIO_printf(PerlIO_stdout(),
3469 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3472 PerlIO_printf(PerlIO_stdout(),
3473 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3476 PerlIO_printf(PerlIO_stdout(),
3477 "EPOC port by Olaf Flebbe, 1999-2002\n");
3480 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3481 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3484 #ifdef __SYMBIAN32__
3485 PerlIO_printf(PerlIO_stdout(),
3486 "Symbian port by Nokia, 2004-2005\n");
3488 #ifdef BINARY_BUILD_NOTICE
3489 BINARY_BUILD_NOTICE;
3491 PerlIO_printf(PerlIO_stdout(),
3493 Perl may be copied only under the terms of either the Artistic License or the\n\
3494 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3495 Complete documentation for Perl, including FAQ lists, should be found on\n\
3496 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3497 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3501 /* compliments of Tom Christiansen */
3503 /* unexec() can be found in the Gnu emacs distribution */
3504 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3507 Perl_my_unexec(pTHX)
3509 PERL_UNUSED_CONTEXT;
3511 SV * prog = newSVpv(BIN_EXP, 0);
3512 SV * file = newSVpv(PL_origfilename, 0);
3516 sv_catpvs(prog, "/perl");
3517 sv_catpvs(file, ".perldump");
3519 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3520 /* unexec prints msg to stderr in case of failure */
3521 PerlProc_exit(status);
3524 # include <lib$routines.h>
3525 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3526 # elif defined(WIN32) || defined(__CYGWIN__)
3527 Perl_croak(aTHX_ "dump is not supported");
3529 ABORT(); /* for use with undump */
3534 /* initialize curinterp */
3540 # define PERLVAR(prefix,var,type)
3541 # define PERLVARA(prefix,var,n,type)
3542 # if defined(PERL_IMPLICIT_CONTEXT)
3543 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3544 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3546 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3547 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3549 # include "intrpvar.h"
3555 # define PERLVAR(prefix,var,type)
3556 # define PERLVARA(prefix,var,n,type)
3557 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3558 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3559 # include "intrpvar.h"
3566 /* As these are inside a structure, PERLVARI isn't capable of initialising
3568 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3569 PL_reg_poscache = PL_reg_starttry = NULL;
3573 S_init_main_stash(pTHX)
3578 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3579 /* We know that the string "main" will be in the global shared string
3580 table, so it's a small saving to use it rather than allocate another
3582 PL_curstname = newSVpvs_share("main");
3583 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3584 /* If we hadn't caused another reference to "main" to be in the shared
3585 string table above, then it would be worth reordering these two,
3586 because otherwise all we do is delete "main" from it as a consequence
3587 of the SvREFCNT_dec, only to add it again with hv_name_set */
3588 SvREFCNT_dec(GvHV(gv));
3589 hv_name_set(PL_defstash, "main", 4, 0);
3590 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3592 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3594 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3595 GvMULTI_on(PL_incgv);
3596 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3597 GvMULTI_on(PL_hintgv);
3598 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3599 SvREFCNT_inc_simple_void(PL_defgv);
3600 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3601 SvREFCNT_inc_simple_void(PL_errgv);
3602 GvMULTI_on(PL_errgv);
3603 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3604 GvMULTI_on(PL_replgv);
3605 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3606 #ifdef PERL_DONT_CREATE_GVSV
3609 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3611 SET_CURSTASH(PL_defstash);
3612 CopSTASH_set(&PL_compiling, PL_defstash);
3613 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3614 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3616 /* We must init $/ before switches are processed. */
3617 sv_setpvs(get_sv("/", GV_ADD), "\n");
3621 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3624 PerlIO *rsfp = NULL;
3627 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3630 PL_origfilename = savepvs("-e");
3633 /* if find_script() returns, it returns a malloc()-ed value */
3634 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3636 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3637 const char *s = scriptname + 8;
3643 * Tell apart "normal" usage of fdscript, e.g.
3644 * with bash on FreeBSD:
3645 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3646 * from usage in suidperl.
3647 * Does any "normal" usage leave garbage after the number???
3648 * Is it a mistake to use a similar /dev/fd/ construct for
3653 * Be supersafe and do some sanity-checks.
3654 * Still, can we be sure we got the right thing?
3657 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3660 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3662 scriptname = savepv(s + 1);
3663 Safefree(PL_origfilename);
3664 PL_origfilename = (char *)scriptname;
3669 CopFILE_free(PL_curcop);
3670 CopFILE_set(PL_curcop, PL_origfilename);
3671 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3672 scriptname = (char *)"";
3673 if (fdscript >= 0) {
3674 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3675 # if defined(HAS_FCNTL) && defined(F_SETFD)
3677 /* ensure close-on-exec */
3678 fcntl(PerlIO_fileno(rsfp),F_SETFD,1);
3681 else if (!*scriptname) {
3682 forbid_setid(0, *suidscript);
3686 #ifdef FAKE_BIT_BUCKET
3687 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3688 * is called) and still have the "-e" work. (Believe it or not,
3689 * a /dev/null is required for the "-e" to work because source
3690 * filter magic is used to implement it. ) This is *not* a general
3691 * replacement for a /dev/null. What we do here is create a temp
3692 * file (an empty file), open up that as the script, and then
3693 * immediately close and unlink it. Close enough for jazz. */
3694 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3695 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3696 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3697 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3698 FAKE_BIT_BUCKET_TEMPLATE
3700 const char * const err = "Failed to create a fake bit bucket";
3701 if (strEQ(scriptname, BIT_BUCKET)) {
3702 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3703 int tmpfd = mkstemp(tmpname);
3705 scriptname = tmpname;
3708 Perl_croak(aTHX_ err);
3711 scriptname = mktemp(tmpname);
3713 Perl_croak(aTHX_ err);
3718 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3719 #ifdef FAKE_BIT_BUCKET
3720 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3721 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3722 && strlen(scriptname) == sizeof(tmpname) - 1) {
3725 scriptname = BIT_BUCKET;
3727 # if defined(HAS_FCNTL) && defined(F_SETFD)
3729 /* ensure close-on-exec */
3730 fcntl(PerlIO_fileno(rsfp),F_SETFD,1);
3734 /* PSz 16 Sep 03 Keep neat error message */
3736 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3738 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3739 CopFILE(PL_curcop), Strerror(errno));
3745 * I_SYSSTATVFS HAS_FSTATVFS
3747 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3748 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3749 * here so that metaconfig picks them up. */
3752 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3753 /* Don't even need this function. */
3756 S_validate_suid(pTHX_ PerlIO *rsfp)
3758 const UV my_uid = PerlProc_getuid();
3759 const UV my_euid = PerlProc_geteuid();
3760 const UV my_gid = PerlProc_getgid();
3761 const UV my_egid = PerlProc_getegid();
3763 PERL_ARGS_ASSERT_VALIDATE_SUID;
3765 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3768 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3769 if ((my_euid != my_uid && my_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3771 (my_egid != my_gid && my_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3774 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3775 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3776 /* not set-id, must be wrapped */
3779 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3782 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3786 register const char *s2;
3788 PERL_ARGS_ASSERT_FIND_BEGINNING;
3790 /* skip forward in input to the real script? */
3793 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3794 Perl_croak(aTHX_ "No Perl script found in input\n");
3796 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3797 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3798 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3800 while (*s == ' ' || *s == '\t') s++;
3802 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3803 || s2[-1] == '_') s2--;
3804 if (strnEQ(s2-4,"perl",4))
3805 while ((s = moreswitches(s)))
3815 const UV my_uid = PerlProc_getuid();
3816 const UV my_euid = PerlProc_geteuid();
3817 const UV my_gid = PerlProc_getgid();
3818 const UV my_egid = PerlProc_getegid();
3820 /* Should not happen: */
3821 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3822 PL_tainting |= (my_uid && (my_euid != my_uid || my_egid != my_gid));
3825 * Should go by suidscript, not uid!=euid: why disallow
3826 * system("ls") in scripts run from setuid things?
3827 * Or, is this run before we check arguments and set suidscript?
3828 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3829 * (We never have suidscript, can we be sure to have fdscript?)
3830 * Or must then go by UID checks? See comments in forbid_setid also.
3834 /* This is used very early in the lifetime of the program,
3835 * before even the options are parsed, so PL_tainting has
3836 * not been initialized properly. */
3838 Perl_doing_taint(int argc, char *argv[], char *envp[])
3840 #ifndef PERL_IMPLICIT_SYS
3841 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3842 * before we have an interpreter-- and the whole point of this
3843 * function is to be called at such an early stage. If you are on
3844 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3845 * "tainted because running with altered effective ids', you'll
3846 * have to add your own checks somewhere in here. The two most
3847 * known samples of 'implicitness' are Win32 and NetWare, neither
3848 * of which has much of concept of 'uids'. */
3849 int uid = PerlProc_getuid();
3850 int euid = PerlProc_geteuid();
3851 int gid = PerlProc_getgid();
3852 int egid = PerlProc_getegid();
3859 if (uid && (euid != uid || egid != gid))
3861 #endif /* !PERL_IMPLICIT_SYS */
3862 /* This is a really primitive check; environment gets ignored only
3863 * if -T are the first chars together; otherwise one gets
3864 * "Too late" message. */
3865 if ( argc > 1 && argv[1][0] == '-'
3866 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3871 /* Passing the flag as a single char rather than a string is a slight space
3872 optimisation. The only message that isn't /^-.$/ is
3873 "program input from stdin", which is substituted in place of '\0', which
3874 could never be a command line flag. */
3876 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3879 char string[3] = "-x";
3880 const char *message = "program input from stdin";
3887 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3888 if (PerlProc_getuid() != PerlProc_geteuid())
3889 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3890 if (PerlProc_getgid() != PerlProc_getegid())
3891 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3892 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3894 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3898 Perl_init_dbargs(pTHX)
3900 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3905 /* Someone has already created it.
3906 It might have entries, and if we just turn off AvREAL(), they will
3907 "leak" until global destruction. */
3909 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
3910 Perl_croak(aTHX_ "Cannot set tied @DB::args");
3912 AvREIFY_only(PL_dbargs);
3916 Perl_init_debugger(pTHX)
3919 HV * const ostash = PL_curstash;
3921 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
3923 Perl_init_dbargs(aTHX);
3924 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3925 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3926 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3927 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3928 if (!SvIOK(PL_DBsingle))
3929 sv_setiv(PL_DBsingle, 0);
3930 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3931 if (!SvIOK(PL_DBtrace))
3932 sv_setiv(PL_DBtrace, 0);
3933 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3934 if (!SvIOK(PL_DBsignal))
3935 sv_setiv(PL_DBsignal, 0);
3936 SvREFCNT_dec(PL_curstash);
3937 PL_curstash = ostash;
3940 #ifndef STRESS_REALLOC
3941 #define REASONABLE(size) (size)
3943 #define REASONABLE(size) (1) /* unreasonable */
3947 Perl_init_stacks(pTHX)
3950 /* start with 128-item stack and 8K cxstack */
3951 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3952 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3953 PL_curstackinfo->si_type = PERLSI_MAIN;
3954 PL_curstack = PL_curstackinfo->si_stack;
3955 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3957 PL_stack_base = AvARRAY(PL_curstack);
3958 PL_stack_sp = PL_stack_base;
3959 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3961 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3964 PL_tmps_max = REASONABLE(128);
3966 Newx(PL_markstack,REASONABLE(32),I32);
3967 PL_markstack_ptr = PL_markstack;
3968 PL_markstack_max = PL_markstack + REASONABLE(32);
3972 Newx(PL_scopestack,REASONABLE(32),I32);
3974 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3976 PL_scopestack_ix = 0;
3977 PL_scopestack_max = REASONABLE(32);
3979 Newx(PL_savestack,REASONABLE(128),ANY);
3980 PL_savestack_ix = 0;
3981 PL_savestack_max = REASONABLE(128);
3990 while (PL_curstackinfo->si_next)
3991 PL_curstackinfo = PL_curstackinfo->si_next;
3992 while (PL_curstackinfo) {
3993 PERL_SI *p = PL_curstackinfo->si_prev;
3994 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3995 Safefree(PL_curstackinfo->si_cxstack);
3996 Safefree(PL_curstackinfo);
3997 PL_curstackinfo = p;
3999 Safefree(PL_tmps_stack);
4000 Safefree(PL_markstack);
4001 Safefree(PL_scopestack);
4003 Safefree(PL_scopestack_name);
4005 Safefree(PL_savestack);
4009 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4011 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4012 AV *const isa = GvAVn(gv);
4015 PERL_ARGS_ASSERT_POPULATE_ISA;
4017 if(AvFILLp(isa) != -1)
4020 /* NOTE: No support for tied ISA */
4022 va_start(args, len);
4024 const char *const parent = va_arg(args, const char*);
4029 parent_len = va_arg(args, size_t);
4031 /* Arguments are supplied with a trailing :: */
4032 assert(parent_len > 2);
4033 assert(parent[parent_len - 1] == ':');
4034 assert(parent[parent_len - 2] == ':');
4035 av_push(isa, newSVpvn(parent, parent_len - 2));
4036 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4043 S_init_predump_symbols(pTHX)
4049 sv_setpvs(get_sv("\"", GV_ADD), " ");
4050 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4053 /* Historically, PVIOs were blessed into IO::Handle, unless
4054 FileHandle was loaded, in which case they were blessed into
4055 that. Action at a distance.
4056 However, if we simply bless into IO::Handle, we break code
4057 that assumes that PVIOs will have (among others) a seek
4058 method. IO::File inherits from IO::Handle and IO::Seekable,
4059 and provides the needed methods. But if we simply bless into
4060 it, then we break code that assumed that by loading
4061 IO::Handle, *it* would work.
4062 So a compromise is to set up the correct @IO::File::ISA,
4063 so that code that does C<use IO::Handle>; will still work.
4066 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4067 STR_WITH_LEN("IO::Handle::"),
4068 STR_WITH_LEN("IO::Seekable::"),
4069 STR_WITH_LEN("Exporter::"),
4072 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4073 GvMULTI_on(PL_stdingv);
4074 io = GvIOp(PL_stdingv);
4075 IoTYPE(io) = IoTYPE_RDONLY;
4076 IoIFP(io) = PerlIO_stdin();
4077 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4079 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4081 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4084 IoTYPE(io) = IoTYPE_WRONLY;
4085 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4087 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4089 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4091 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4092 GvMULTI_on(PL_stderrgv);
4093 io = GvIOp(PL_stderrgv);
4094 IoTYPE(io) = IoTYPE_WRONLY;
4095 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4096 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4098 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4100 PL_statname = newSVpvs(""); /* last filename we did stat on */
4104 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4108 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4110 argc--,argv++; /* skip name of script */
4111 if (PL_doswitches) {
4112 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4116 if (argv[0][1] == '-' && !argv[0][2]) {
4120 if ((s = strchr(argv[0], '='))) {
4121 const char *const start_name = argv[0] + 1;
4122 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4123 TRUE, SVt_PV)), s + 1);
4126 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4129 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4130 GvMULTI_on(PL_argvgv);
4131 (void)gv_AVadd(PL_argvgv);
4132 av_clear(GvAVn(PL_argvgv));
4133 for (; argc > 0; argc--,argv++) {
4134 SV * const sv = newSVpv(argv[0],0);
4135 av_push(GvAVn(PL_argvgv),sv);
4136 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4137 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4140 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4141 (void)sv_utf8_decode(sv);
4147 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4152 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4154 PL_toptarget = newSV_type(SVt_PVFM);
4155 sv_setpvs(PL_toptarget, "");
4156 PL_bodytarget = newSV_type(SVt_PVFM);
4157 sv_setpvs(PL_bodytarget, "");
4158 PL_formtarget = PL_bodytarget;
4162 init_argv_symbols(argc,argv);
4164 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4165 sv_setpv(GvSV(tmpgv),PL_origfilename);
4167 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4169 bool env_is_not_environ;
4170 GvMULTI_on(PL_envgv);
4171 hv = GvHVn(PL_envgv);
4172 hv_magic(hv, NULL, PERL_MAGIC_env);
4174 #ifdef USE_ENVIRON_ARRAY
4175 /* Note that if the supplied env parameter is actually a copy
4176 of the global environ then it may now point to free'd memory
4177 if the environment has been modified since. To avoid this
4178 problem we treat env==NULL as meaning 'use the default'
4182 env_is_not_environ = env != environ;
4183 if (env_is_not_environ
4184 # ifdef USE_ITHREADS
4185 && PL_curinterp == aTHX
4194 for (; *env; env++) {
4197 if (!(s = strchr(old_var,'=')) || s == old_var)
4200 #if defined(MSDOS) && !defined(DJGPP)
4202 (void)strupr(old_var);
4205 sv = newSVpv(s+1, 0);
4206 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4207 if (env_is_not_environ)
4211 #endif /* USE_ENVIRON_ARRAY */
4212 #endif /* !PERL_MICRO */
4216 /* touch @F array to prevent spurious warnings 20020415 MJD */
4218 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4223 S_init_perllib(pTHX)
4227 const char *perl5lib = NULL;
4230 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4236 perl5lib = PerlEnv_getenv("PERL5LIB");
4238 * It isn't possible to delete an environment variable with
4239 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4240 * case we treat PERL5LIB as undefined if it has a zero-length value.
4242 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4243 if (perl5lib && *perl5lib != '\0')
4247 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4249 s = PerlEnv_getenv("PERLLIB");
4251 incpush_use_sep(s, 0, 0);
4254 /* Treat PERL5?LIB as a possible search list logical name -- the
4255 * "natural" VMS idiom for a Unix path string. We allow each
4256 * element to be a set of |-separated directories for compatibility.
4260 if (my_trnlnm("PERL5LIB",buf,0))
4262 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4263 } while (my_trnlnm("PERL5LIB",buf,++idx));
4265 while (my_trnlnm("PERLLIB",buf,idx++))
4266 incpush_use_sep(buf, 0, 0);
4271 #ifndef PERL_IS_MINIPERL
4272 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4273 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4275 /* Use the ~-expanded versions of APPLLIB (undocumented),
4276 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4279 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4280 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4284 /* sitearch is always relative to sitelib on Windows for
4285 * DLL-based path intuition to work correctly */
4286 # if !defined(WIN32)
4287 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4288 INCPUSH_CAN_RELOCATE);
4294 /* this picks up sitearch as well */
4295 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4297 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4299 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4303 #ifdef PERL_VENDORARCH_EXP
4304 /* vendorarch is always relative to vendorlib on Windows for
4305 * DLL-based path intuition to work correctly */
4306 # if !defined(WIN32)
4307 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4308 INCPUSH_CAN_RELOCATE);
4312 #ifdef PERL_VENDORLIB_EXP
4314 /* this picks up vendorarch as well */
4315 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4317 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4319 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4320 INCPUSH_CAN_RELOCATE);
4325 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4329 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4333 s = win32_get_privlib(PERL_FS_VERSION, &len);
4335 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4338 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4340 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4344 #ifdef PERL_OTHERLIBDIRS
4345 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4346 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4347 |INCPUSH_CAN_RELOCATE);
4353 * It isn't possible to delete an environment variable with
4354 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4355 * case we treat PERL5LIB as undefined if it has a zero-length value.
4357 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4358 if (perl5lib && *perl5lib != '\0')
4362 incpush_use_sep(perl5lib, 0,
4363 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4365 /* Treat PERL5?LIB as a possible search list logical name -- the
4366 * "natural" VMS idiom for a Unix path string. We allow each
4367 * element to be a set of |-separated directories for compatibility.
4371 if (my_trnlnm("PERL5LIB",buf,0))
4373 incpush_use_sep(buf, 0,
4374 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4375 } while (my_trnlnm("PERL5LIB",buf,++idx));
4379 /* Use the ~-expanded versions of APPLLIB (undocumented),
4380 SITELIB and VENDORLIB for older versions
4383 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4384 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4387 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4388 /* Search for version-specific dirs below here */
4389 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4390 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4394 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4395 /* Search for version-specific dirs below here */
4396 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4397 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4400 #ifdef PERL_OTHERLIBDIRS
4401 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4402 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4403 |INCPUSH_CAN_RELOCATE);
4405 #endif /* !PERL_IS_MINIPERL */
4408 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4411 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4412 # define PERLLIB_SEP ';'
4415 # define PERLLIB_SEP '|'
4417 # define PERLLIB_SEP ':'
4420 #ifndef PERLLIB_MANGLE
4421 # define PERLLIB_MANGLE(s,n) (s)
4424 #ifndef PERL_IS_MINIPERL
4425 /* Push a directory onto @INC if it exists.
4426 Generate a new SV if we do this, to save needing to copy the SV we push
4429 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4434 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4436 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4437 S_ISDIR(tmpstatbuf.st_mode)) {
4439 dir = newSVsv(stem);
4441 /* Truncate dir back to stem. */
4442 SvCUR_set(dir, SvCUR(stem));
4449 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4451 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4454 PERL_ARGS_ASSERT_MAYBERELOCATE;
4458 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4459 defined to so something (in os2/os2.c), but the code has been
4460 this way, ignoring any possible changed of length, since
4461 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4463 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4465 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4472 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4474 while (unix[len-1] == '/') len--; /* Cosmetic */
4475 sv_usepvn(libdir,unix,len);
4478 PerlIO_printf(Perl_error_log,
4479 "Failed to unixify @INC element \"%s\"\n",
4480 SvPV_nolen_const(libdir));
4484 /* Do the if() outside the #ifdef to avoid warnings about an unused
4487 #ifdef PERL_RELOCATABLE_INC
4489 * Relocatable include entries are marked with a leading .../
4492 * 0: Remove that leading ".../"
4493 * 1: Remove trailing executable name (anything after the last '/')
4494 * from the perl path to give a perl prefix
4496 * While the @INC element starts "../" and the prefix ends with a real
4497 * directory (ie not . or ..) chop that real directory off the prefix
4498 * and the leading "../" from the @INC element. ie a logical "../"
4500 * Finally concatenate the prefix and the remainder of the @INC element
4501 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4502 * generates /usr/local/lib/perl5
4504 const char *libpath = SvPVX(libdir);
4505 STRLEN libpath_len = SvCUR(libdir);
4506 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4508 SV * const caret_X = get_sv("\030", 0);
4509 /* Going to use the SV just as a scratch buffer holding a C
4515 /* $^X is *the* source of taint if tainting is on, hence
4516 SvPOK() won't be true. */
4518 assert(SvPOKp(caret_X));
4519 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4521 /* Firstly take off the leading .../
4522 If all else fail we'll do the paths relative to the current
4524 sv_chop(libdir, libpath + 4);
4525 /* Don't use SvPV as we're intentionally bypassing taining,
4526 mortal copies that the mg_get of tainting creates, and
4527 corruption that seems to come via the save stack.
4528 I guess that the save stack isn't correctly set up yet. */
4529 libpath = SvPVX(libdir);
4530 libpath_len = SvCUR(libdir);
4532 /* This would work more efficiently with memrchr, but as it's
4533 only a GNU extension we'd need to probe for it and
4534 implement our own. Not hard, but maybe not worth it? */
4536 prefix = SvPVX(prefix_sv);
4537 lastslash = strrchr(prefix, '/');
4539 /* First time in with the *lastslash = '\0' we just wipe off
4540 the trailing /perl from (say) /usr/foo/bin/perl
4544 while ((*lastslash = '\0'), /* Do that, come what may. */
4545 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4546 && (lastslash = strrchr(prefix, '/')))) {
4547 if (lastslash[1] == '\0'
4548 || (lastslash[1] == '.'
4549 && (lastslash[2] == '/' /* ends "/." */
4550 || (lastslash[2] == '/'
4551 && lastslash[3] == '/' /* or "/.." */
4553 /* Prefix ends "/" or "/." or "/..", any of which
4554 are fishy, so don't do any more logical cleanup.
4558 /* Remove leading "../" from path */
4561 /* Next iteration round the loop removes the last
4562 directory name from prefix by writing a '\0' in
4563 the while clause. */
4565 /* prefix has been terminated with a '\0' to the correct
4566 length. libpath points somewhere into the libdir SV.
4567 We need to join the 2 with '/' and drop the result into
4569 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4570 SvREFCNT_dec(libdir);
4571 /* And this is the new libdir. */
4574 (PerlProc_getuid() != PerlProc_geteuid() ||
4575 PerlProc_getgid() != PerlProc_getegid())) {
4576 /* Need to taint relocated paths if running set ID */
4577 SvTAINTED_on(libdir);
4580 SvREFCNT_dec(prefix_sv);
4588 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4591 #ifndef PERL_IS_MINIPERL
4592 const U8 using_sub_dirs
4593 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4594 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4595 const U8 add_versioned_sub_dirs
4596 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4597 const U8 add_archonly_sub_dirs
4598 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4599 #ifdef PERL_INC_VERSION_LIST
4600 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4603 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4604 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4605 AV *const inc = GvAVn(PL_incgv);
4607 PERL_ARGS_ASSERT_INCPUSH;
4610 /* Could remove this vestigial extra block, if we don't mind a lot of
4611 re-indenting diff noise. */
4613 SV *const libdir = mayberelocate(dir, len, flags);
4614 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4615 arranged to unshift #! line -I onto the front of @INC. However,
4616 -I can add version and architecture specific libraries, and they
4617 need to go first. The old code assumed that it was always
4618 pushing. Hence to make it work, need to push the architecture
4619 (etc) libraries onto a temporary array, then "unshift" that onto
4620 the front of @INC. */
4621 #ifndef PERL_IS_MINIPERL
4622 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4625 * BEFORE pushing libdir onto @INC we may first push version- and
4626 * archname-specific sub-directories.
4628 if (using_sub_dirs) {
4629 SV *subdir = newSVsv(libdir);
4630 #ifdef PERL_INC_VERSION_LIST
4631 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4632 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4633 const char * const *incver;
4636 if (add_versioned_sub_dirs) {
4637 /* .../version/archname if -d .../version/archname */
4638 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4639 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4641 /* .../version if -d .../version */
4642 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4643 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4646 #ifdef PERL_INC_VERSION_LIST
4648 for (incver = incverlist; *incver; incver++) {
4649 /* .../xxx if -d .../xxx */
4650 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4651 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4656 if (add_archonly_sub_dirs) {
4657 /* .../archname if -d .../archname */
4658 sv_catpvs(subdir, "/" ARCHNAME);
4659 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4663 assert (SvREFCNT(subdir) == 1);
4664 SvREFCNT_dec(subdir);
4666 #endif /* !PERL_IS_MINIPERL */
4667 /* finally add this lib directory at the end of @INC */
4669 #ifdef PERL_IS_MINIPERL
4670 const U32 extra = 0;
4672 U32 extra = av_len(av) + 1;
4674 av_unshift(inc, extra + push_basedir);
4676 av_store(inc, extra, libdir);
4677 #ifndef PERL_IS_MINIPERL
4679 /* av owns a reference, av_store() expects to be donated a
4680 reference, and av expects to be sane when it's cleared.
4681 If I wanted to be naughty and wrong, I could peek inside the
4682 implementation of av_clear(), realise that it uses
4683 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4684 and so directly steal from it (with a memcpy() to inc, and
4685 then memset() to NULL them out. But people copy code from the
4686 core expecting it to be best practise, so let's use the API.
4687 Although studious readers will note that I'm not checking any
4689 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4694 else if (push_basedir) {
4695 av_push(inc, libdir);
4698 if (!push_basedir) {
4699 assert (SvREFCNT(libdir) == 1);
4700 SvREFCNT_dec(libdir);
4706 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4710 /* This logic has been broken out from S_incpush(). It may be possible to
4713 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4715 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4716 * argument to incpush_use_sep. This allows creation of relocatable
4717 * Perl distributions that patch the binary at install time. Those
4718 * distributions will have to provide their own relocation tools; this
4719 * is not a feature otherwise supported by core Perl.
4721 #ifndef PERL_RELOCATABLE_INCPUSH
4728 /* Break at all separators */
4729 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4731 /* skip any consecutive separators */
4733 /* Uncomment the next line for PATH semantics */
4734 /* But you'll need to write tests */
4735 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4737 incpush(p, (STRLEN)(s - p), flags);
4742 incpush(p, (STRLEN)(end - p), flags);
4747 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4751 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4757 PERL_ARGS_ASSERT_CALL_LIST;
4759 while (av_len(paramList) >= 0) {
4760 cv = MUTABLE_CV(av_shift(paramList));
4762 if (paramList == PL_beginav) {
4763 /* save PL_beginav for compiler */
4764 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4766 else if (paramList == PL_checkav) {
4767 /* save PL_checkav for compiler */
4768 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4770 else if (paramList == PL_unitcheckav) {
4771 /* save PL_unitcheckav for compiler */
4772 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4783 PL_madskills |= 16384;
4788 PL_madskills &= ~16384;
4791 (void)SvPV_const(atsv, len);
4793 PL_curcop = &PL_compiling;
4794 CopLINE_set(PL_curcop, oldline);
4795 if (paramList == PL_beginav)
4796 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4798 Perl_sv_catpvf(aTHX_ atsv,
4799 "%s failed--call queue aborted",
4800 paramList == PL_checkav ? "CHECK"
4801 : paramList == PL_initav ? "INIT"
4802 : paramList == PL_unitcheckav ? "UNITCHECK"
4804 while (PL_scopestack_ix > oldscope)
4807 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4814 /* my_exit() was called */
4815 while (PL_scopestack_ix > oldscope)
4818 SET_CURSTASH(PL_defstash);
4819 PL_curcop = &PL_compiling;
4820 CopLINE_set(PL_curcop, oldline);
4826 PL_curcop = &PL_compiling;
4827 CopLINE_set(PL_curcop, oldline);
4830 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
4839 Perl_my_exit(pTHX_ U32 status)
4850 STATUS_EXIT_SET(status);
4857 Perl_my_failure_exit(pTHX)
4861 /* We have been called to fall on our sword. The desired exit code
4862 * should be already set in STATUS_UNIX, but could be shifted over
4863 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4866 * If an error code has not been set, then force the issue.
4868 if (MY_POSIX_EXIT) {
4870 /* According to the die_exit.t tests, if errno is non-zero */
4871 /* It should be used for the error status. */
4873 if (errno == EVMSERR) {
4874 STATUS_NATIVE = vaxc$errno;
4877 /* According to die_exit.t tests, if the child_exit code is */
4878 /* also zero, then we need to exit with a code of 255 */
4879 if ((errno != 0) && (errno < 256))
4880 STATUS_UNIX_EXIT_SET(errno);
4881 else if (STATUS_UNIX < 255) {
4882 STATUS_UNIX_EXIT_SET(255);
4887 /* The exit code could have been set by $? or vmsish which
4888 * means that it may not have fatal set. So convert
4889 * success/warning codes to fatal with out changing
4890 * the POSIX status code. The severity makes VMS native
4891 * status handling work, while UNIX mode programs use the
4892 * the POSIX exit codes.
4894 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4895 STATUS_NATIVE &= STS$M_COND_ID;
4896 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4900 /* Traditionally Perl on VMS always expects a Fatal Error. */
4901 if (vaxc$errno & 1) {
4903 /* So force success status to failure */
4904 if (STATUS_NATIVE & 1)
4909 STATUS_UNIX = EINTR; /* In case something cares */
4914 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4916 /* Encode the severity code */
4917 severity = STATUS_NATIVE & STS$M_SEVERITY;
4918 STATUS_UNIX = (severity ? severity : 1) << 8;
4920 /* Perl expects this to be a fatal error */
4921 if (severity != STS$K_SEVERE)
4930 STATUS_UNIX_SET(errno);
4932 exitstatus = STATUS_UNIX >> 8;
4933 if (exitstatus & 255)
4934 STATUS_UNIX_SET(exitstatus);
4936 STATUS_UNIX_SET(255);
4943 S_my_exit_jump(pTHX)
4948 SvREFCNT_dec(PL_e_script);
4952 POPSTACK_TO(PL_mainstack);
4960 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4963 const char * const p = SvPVX_const(PL_e_script);
4964 const char *nl = strchr(p, '\n');
4966 PERL_UNUSED_ARG(idx);
4967 PERL_UNUSED_ARG(maxlen);
4969 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4971 filter_del(read_e_script);
4974 sv_catpvn(buf_sv, p, nl-p);
4975 sv_chop(PL_e_script, nl);
4981 * c-indentation-style: bsd
4983 * indent-tabs-mode: t
4986 * ex: set ts=8 sts=4 sw=4 noet: