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 open_script(scriptname, dosearch, &suidscript, &rsfp);
2078 validate_suid(validarg, scriptname, fdscript, suidscript,
2082 # if defined(SIGCHLD) || defined(SIGCLD)
2085 # define SIGCHLD SIGCLD
2087 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2088 if (sigstate == (Sighandler_t) SIG_IGN) {
2089 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2090 "Can't ignore signal CHLD, forcing to default");
2091 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2099 /* This will croak if suidscript is true, as -x cannot be used with
2101 forbid_setid('x', suidscript);
2102 /* Hence you can't get here if suidscript is true */
2104 find_beginning(linestr_sv, rsfp);
2105 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2106 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2110 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2111 CvUNIQUE_on(PL_compcv);
2113 CvPADLIST(PL_compcv) = pad_new(0);
2115 PL_isarev = newHV();
2118 boot_core_UNIVERSAL();
2120 newXS("Internals::V", S_Internals_V, __FILE__);
2123 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2125 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN)
2131 # ifdef HAS_SOCKS5_INIT
2132 socks5_init(argv[0]);
2138 init_predump_symbols();
2139 /* init_postdump_symbols not currently designed to be called */
2140 /* more than once (ENV isn't cleared first, for example) */
2141 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2143 init_postdump_symbols(argc,argv,env);
2145 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2146 * or explicitly in some platforms.
2147 * locale.c:Perl_init_i18nl10n() if the environment
2148 * look like the user wants to use UTF-8. */
2149 #if defined(__SYMBIAN32__)
2150 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2152 # ifndef PERL_IS_MINIPERL
2154 /* Requires init_predump_symbols(). */
2155 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2160 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2161 * and the default open disciplines. */
2162 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2163 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2165 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2166 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2167 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2169 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2170 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2171 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2173 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2174 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2175 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2177 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2178 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2181 sv_setpvs(sv, ":utf8\0:utf8");
2183 sv_setpvs(sv, ":utf8\0");
2186 sv_setpvs(sv, "\0:utf8");
2195 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2196 if (strEQ(s, "unsafe"))
2197 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2198 else if (strEQ(s, "safe"))
2199 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2201 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2208 if ((s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2212 PL_xmlfp = PerlIO_stdout();
2214 PL_xmlfp = PerlIO_open(s, "w");
2216 Perl_croak(aTHX_ "Can't open %s", s);
2218 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2224 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2225 PL_madskills = atoi(s);
2226 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2231 lex_start(linestr_sv, rsfp, 0);
2232 PL_subname = newSVpvs("main");
2234 if (add_read_e_script)
2235 filter_add(read_e_script, NULL);
2237 /* now parse the script */
2239 SETERRNO(0,SS_NORMAL);
2240 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2242 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2244 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2248 CopLINE_set(PL_curcop, 0);
2249 SET_CURSTASH(PL_defstash);
2251 SvREFCNT_dec(PL_e_script);
2259 SAVECOPFILE(PL_curcop);
2260 SAVECOPLINE(PL_curcop);
2261 gv_check(PL_defstash);
2270 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2271 dump_mstats("after compilation:");
2276 PL_restartjmpenv = NULL;
2282 =for apidoc perl_run
2284 Tells a Perl interpreter to run. See L<perlembed>.
2297 PERL_ARGS_ASSERT_PERL_RUN;
2298 #ifndef MULTIPLICITY
2299 PERL_UNUSED_ARG(my_perl);
2302 oldscope = PL_scopestack_ix;
2310 cxstack_ix = -1; /* start context stack again */
2312 case 0: /* normal completion */
2316 case 2: /* my_exit() */
2317 while (PL_scopestack_ix > oldscope)
2320 SET_CURSTASH(PL_defstash);
2321 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2322 PL_endav && !PL_minus_c) {
2323 PERL_SET_PHASE(PERL_PHASE_END);
2324 call_list(oldscope, PL_endav);
2327 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2328 dump_mstats("after execution: ");
2334 POPSTACK_TO(PL_mainstack);
2337 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2348 S_run_body(pTHX_ I32 oldscope)
2351 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n",
2352 PL_sawampersand ? "Enabling" : "Omitting"));
2354 if (!PL_restartop) {
2358 exit(0); /* less likely to core dump than my_exit(0) */
2362 if (DEBUG_x_TEST || DEBUG_B_TEST)
2363 dump_all_perl(!DEBUG_B_TEST);
2365 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2369 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2372 if (PERLDB_SINGLE && PL_DBsingle)
2373 sv_setiv(PL_DBsingle, 1);
2375 PERL_SET_PHASE(PERL_PHASE_INIT);
2376 call_list(oldscope, PL_initav);
2378 #ifdef PERL_DEBUG_READONLY_OPS
2379 Perl_pending_Slabs_to_ro(aTHX);
2385 PERL_SET_PHASE(PERL_PHASE_RUN);
2388 PL_restartjmpenv = NULL;
2389 PL_op = PL_restartop;
2393 else if (PL_main_start) {
2394 CvDEPTH(PL_main_cv) = 1;
2395 PL_op = PL_main_start;
2403 =head1 SV Manipulation Functions
2405 =for apidoc p||get_sv
2407 Returns the SV of the specified Perl scalar. C<flags> are passed to
2408 C<gv_fetchpv>. If C<GV_ADD> is set and the
2409 Perl variable does not exist then it will be created. If C<flags> is zero
2410 and the variable does not exist then NULL is returned.
2416 Perl_get_sv(pTHX_ const char *name, I32 flags)
2420 PERL_ARGS_ASSERT_GET_SV;
2422 gv = gv_fetchpv(name, flags, SVt_PV);
2429 =head1 Array Manipulation Functions
2431 =for apidoc p||get_av
2433 Returns the AV of the specified Perl global or package array with the given
2434 name (so it won't work on lexical variables). C<flags> are passed
2435 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2436 Perl variable does not exist then it will be created. If C<flags> is zero
2437 and the variable does not exist then NULL is returned.
2439 Perl equivalent: C<@{"$name"}>.
2445 Perl_get_av(pTHX_ const char *name, I32 flags)
2447 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2449 PERL_ARGS_ASSERT_GET_AV;
2459 =head1 Hash Manipulation Functions
2461 =for apidoc p||get_hv
2463 Returns the HV of the specified Perl hash. C<flags> are passed to
2464 C<gv_fetchpv>. If C<GV_ADD> is set and the
2465 Perl variable does not exist then it will be created. If C<flags> is zero
2466 and the variable does not exist then NULL is returned.
2472 Perl_get_hv(pTHX_ const char *name, I32 flags)
2474 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2476 PERL_ARGS_ASSERT_GET_HV;
2486 =head1 CV Manipulation Functions
2488 =for apidoc p||get_cvn_flags
2490 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2491 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2492 exist then it will be declared (which has the same effect as saying
2493 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2494 then NULL is returned.
2496 =for apidoc p||get_cv
2498 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2504 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2506 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2507 /* XXX this is probably not what they think they're getting.
2508 * It has the same effect as "sub name;", i.e. just a forward
2511 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2513 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2514 SV *const sv = newSVpvn_flags(name, len, flags & SVf_UTF8);
2515 return newSUB(start_subparse(FALSE, 0),
2516 newSVOP(OP_CONST, 0, sv),
2524 /* Nothing in core calls this now, but we can't replace it with a macro and
2525 move it to mathoms.c as a macro would evaluate name twice. */
2527 Perl_get_cv(pTHX_ const char *name, I32 flags)
2529 PERL_ARGS_ASSERT_GET_CV;
2531 return get_cvn_flags(name, strlen(name), flags);
2534 /* Be sure to refetch the stack pointer after calling these routines. */
2538 =head1 Callback Functions
2540 =for apidoc p||call_argv
2542 Performs a callback to the specified named and package-scoped Perl subroutine
2543 with C<argv> (a NULL-terminated array of strings) as arguments. See L<perlcall>.
2545 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2551 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv)
2553 /* See G_* flags in cop.h */
2554 /* null terminated arg list */
2559 PERL_ARGS_ASSERT_CALL_ARGV;
2564 mXPUSHs(newSVpv(*argv,0));
2569 return call_pv(sub_name, flags);
2573 =for apidoc p||call_pv
2575 Performs a callback to the specified Perl sub. See L<perlcall>.
2581 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2582 /* name of the subroutine */
2583 /* See G_* flags in cop.h */
2585 PERL_ARGS_ASSERT_CALL_PV;
2587 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2591 =for apidoc p||call_method
2593 Performs a callback to the specified Perl method. The blessed object must
2594 be on the stack. See L<perlcall>.
2600 Perl_call_method(pTHX_ const char *methname, I32 flags)
2601 /* name of the subroutine */
2602 /* See G_* flags in cop.h */
2605 PERL_ARGS_ASSERT_CALL_METHOD;
2607 len = strlen(methname);
2609 /* XXX: sv_2mortal(newSVpvn_share(methname, len)) can be faster */
2610 return call_sv(newSVpvn_flags(methname, len, SVs_TEMP), flags | G_METHOD);
2613 /* May be called with any of a CV, a GV, or an SV containing the name. */
2615 =for apidoc p||call_sv
2617 Performs a callback to the Perl sub whose name is in the SV. See
2624 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2625 /* See G_* flags in cop.h */
2628 LOGOP myop; /* fake syntax tree node */
2633 bool oldcatch = CATCH_GET;
2635 OP* const oldop = PL_op;
2638 PERL_ARGS_ASSERT_CALL_SV;
2640 if (flags & G_DISCARD) {
2644 if (!(flags & G_WANT)) {
2645 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2650 Zero(&myop, 1, LOGOP);
2651 myop.op_next = NULL;
2652 if (!(flags & G_NOARGS))
2653 myop.op_flags |= OPf_STACKED;
2654 myop.op_flags |= OP_GIMME_REVERSE(flags);
2658 EXTEND(PL_stack_sp, 1);
2659 *++PL_stack_sp = sv;
2661 oldscope = PL_scopestack_ix;
2663 if (PERLDB_SUB && PL_curstash != PL_debstash
2664 /* Handle first BEGIN of -d. */
2665 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2666 /* Try harder, since this may have been a sighandler, thus
2667 * curstash may be meaningless. */
2668 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2669 && !(flags & G_NODEBUG))
2670 PL_op->op_private |= OPpENTERSUB_DB;
2672 if (flags & G_METHOD) {
2673 Zero(&method_op, 1, UNOP);
2674 method_op.op_next = PL_op;
2675 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2676 method_op.op_type = OP_METHOD;
2677 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2678 myop.op_type = OP_ENTERSUB;
2679 PL_op = (OP*)&method_op;
2682 if (!(flags & G_EVAL)) {
2684 CALL_BODY_SUB((OP*)&myop);
2685 retval = PL_stack_sp - (PL_stack_base + oldmark);
2686 CATCH_SET(oldcatch);
2689 myop.op_other = (OP*)&myop;
2691 create_eval_scope(flags|G_FAKINGEVAL);
2699 CALL_BODY_SUB((OP*)&myop);
2700 retval = PL_stack_sp - (PL_stack_base + oldmark);
2701 if (!(flags & G_KEEPERR)) {
2709 /* my_exit() was called */
2710 SET_CURSTASH(PL_defstash);
2717 PL_restartjmpenv = NULL;
2718 PL_op = PL_restartop;
2722 PL_stack_sp = PL_stack_base + oldmark;
2723 if ((flags & G_WANT) == G_ARRAY)
2727 *++PL_stack_sp = &PL_sv_undef;
2732 if (PL_scopestack_ix > oldscope)
2733 delete_eval_scope();
2737 if (flags & G_DISCARD) {
2738 PL_stack_sp = PL_stack_base + oldmark;
2747 /* Eval a string. The G_EVAL flag is always assumed. */
2750 =for apidoc p||eval_sv
2752 Tells Perl to C<eval> the string in the SV. It supports the same flags
2753 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2759 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2761 /* See G_* flags in cop.h */
2765 UNOP myop; /* fake syntax tree node */
2766 VOL I32 oldmark = SP - PL_stack_base;
2769 OP* const oldop = PL_op;
2772 PERL_ARGS_ASSERT_EVAL_SV;
2774 if (flags & G_DISCARD) {
2781 Zero(PL_op, 1, UNOP);
2782 EXTEND(PL_stack_sp, 1);
2783 *++PL_stack_sp = sv;
2785 if (!(flags & G_NOARGS))
2786 myop.op_flags = OPf_STACKED;
2787 myop.op_next = NULL;
2788 myop.op_type = OP_ENTEREVAL;
2789 myop.op_flags |= OP_GIMME_REVERSE(flags);
2790 if (flags & G_KEEPERR)
2791 myop.op_flags |= OPf_SPECIAL;
2793 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2794 * before a PUSHEVAL, which corrupts the stack after a croak */
2795 TAINT_PROPER("eval_sv()");
2801 if (PL_op == (OP*)(&myop)) {
2802 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2804 goto fail; /* failed in compilation */
2807 retval = PL_stack_sp - (PL_stack_base + oldmark);
2808 if (!(flags & G_KEEPERR)) {
2816 /* my_exit() was called */
2817 SET_CURSTASH(PL_defstash);
2824 PL_restartjmpenv = NULL;
2825 PL_op = PL_restartop;
2830 PL_stack_sp = PL_stack_base + oldmark;
2831 if ((flags & G_WANT) == G_ARRAY)
2835 *++PL_stack_sp = &PL_sv_undef;
2841 if (flags & G_DISCARD) {
2842 PL_stack_sp = PL_stack_base + oldmark;
2852 =for apidoc p||eval_pv
2854 Tells Perl to C<eval> the given string and return an SV* result.
2860 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2864 SV* sv = newSVpv(p, 0);
2866 PERL_ARGS_ASSERT_EVAL_PV;
2868 eval_sv(sv, G_SCALAR);
2875 if (croak_on_error && SvTRUE(ERRSV)) {
2876 Perl_croak(aTHX_ "%s", SvPVx_nolen_const(ERRSV));
2882 /* Require a module. */
2885 =head1 Embedding Functions
2887 =for apidoc p||require_pv
2889 Tells Perl to C<require> the file named by the string argument. It is
2890 analogous to the Perl code C<eval "require '$file'">. It's even
2891 implemented that way; consider using load_module instead.
2896 Perl_require_pv(pTHX_ const char *pv)
2902 PERL_ARGS_ASSERT_REQUIRE_PV;
2904 PUSHSTACKi(PERLSI_REQUIRE);
2906 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2907 eval_sv(sv_2mortal(sv), G_DISCARD);
2913 S_usage(pTHX) /* XXX move this out into a module ? */
2915 /* This message really ought to be max 23 lines.
2916 * Removed -h because the user already knows that option. Others? */
2918 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2919 minimum of 509 character string literals. */
2920 static const char * const usage_msg[] = {
2921 " -0[octal] specify record separator (\\0, if no argument)\n"
2922 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2923 " -C[number/list] enables the listed Unicode features\n"
2924 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2925 " -d[:debugger] run program under debugger\n"
2926 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2927 " -e program one line of program (several -e's allowed, omit programfile)\n"
2928 " -E program like -e, but enables all optional features\n"
2929 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2930 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2931 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2932 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2933 " -l[octal] enable line ending processing, specifies line terminator\n"
2934 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2935 " -n assume \"while (<>) { ... }\" loop around program\n"
2936 " -p assume loop like -n but print line also, like sed\n"
2937 " -s enable rudimentary parsing for switches after programfile\n"
2938 " -S look for programfile using PATH environment variable\n",
2939 " -t enable tainting warnings\n"
2940 " -T enable tainting checks\n"
2941 " -u dump core after parsing program\n"
2942 " -U allow unsafe operations\n"
2943 " -v print version, patchlevel and license\n"
2944 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2945 " -w enable many useful warnings\n"
2946 " -W enable all warnings\n"
2947 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
2948 " -X disable all warnings\n"
2950 "Run 'perldoc perl' for more help with Perl.\n\n",
2953 const char * const *p = usage_msg;
2954 PerlIO *out = PerlIO_stdout();
2957 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
2960 PerlIO_puts(out, *p++);
2964 /* convert a string of -D options (or digits) into an int.
2965 * sets *s to point to the char after the options */
2969 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
2971 static const char * const usage_msgd[] = {
2972 " Debugging flag values: (see also -d)\n"
2973 " p Tokenizing and parsing (with v, displays parse stack)\n"
2974 " s Stack snapshots (with v, displays all stacks)\n"
2975 " l Context (loop) stack processing\n"
2976 " t Trace execution\n"
2977 " o Method and overloading resolution\n",
2978 " c String/numeric conversions\n"
2979 " P Print profiling info, source file input state\n"
2980 " m Memory and SV allocation\n"
2981 " f Format processing\n"
2982 " r Regular expression parsing and execution\n"
2983 " x Syntax tree dump\n",
2984 " u Tainting checks\n"
2985 " H Hash dump -- usurps values()\n"
2986 " X Scratchpad allocation\n"
2989 " R Include reference counts of dumped variables (eg when using -Ds)\n",
2990 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
2991 " v Verbose: use in conjunction with other flags\n"
2992 " C Copy On Write\n"
2993 " A Consistency checks on internal structures\n"
2994 " q quiet - currently only suppresses the 'EXECUTING' message\n"
2995 " M trace smart match resolution\n"
2996 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3001 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3004 /* if adding extra options, remember to update DEBUG_MASK */
3005 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
3007 for (; isALNUM(**s); (*s)++) {
3008 const char * const d = strchr(debopts,**s);
3010 i |= 1 << (d - debopts);
3011 else if (ckWARN_d(WARN_DEBUGGING))
3012 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3013 "invalid option -D%c, use -D'' to see choices\n", **s);
3016 else if (isDIGIT(**s)) {
3018 for (; isALNUM(**s); (*s)++) ;
3020 else if (givehelp) {
3021 const char *const *p = usage_msgd;
3022 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3025 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3026 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3027 "-Dp not implemented on this platform\n");
3033 /* This routine handles any switches that can be given during run */
3036 Perl_moreswitches(pTHX_ const char *s)
3040 const char option = *s; /* used to remember option in -m/-M code */
3042 PERL_ARGS_ASSERT_MORESWITCHES;
3050 SvREFCNT_dec(PL_rs);
3051 if (s[1] == 'x' && s[2]) {
3052 const char *e = s+=2;
3058 flags = PERL_SCAN_SILENT_ILLDIGIT;
3059 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3060 if (s + numlen < e) {
3061 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3065 PL_rs = newSVpvs("");
3066 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3067 tmps = (U8*)SvPVX(PL_rs);
3068 uvchr_to_utf8(tmps, rschar);
3069 SvCUR_set(PL_rs, UNISKIP(rschar));
3074 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3075 if (rschar & ~((U8)~0))
3076 PL_rs = &PL_sv_undef;
3077 else if (!rschar && numlen >= 2)
3078 PL_rs = newSVpvs("");
3080 char ch = (char)rschar;
3081 PL_rs = newSVpvn(&ch, 1);
3084 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3089 PL_unicode = parse_unicode_opts( (const char **)&s );
3090 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3096 while (*s && !isSPACE(*s)) ++s;
3097 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3108 forbid_setid('d', FALSE);
3111 /* -dt indicates to the debugger that threads will be used */
3112 if (*s == 't' && !isALNUM(s[1])) {
3114 my_setenv("PERL5DB_THREADED", "1");
3117 /* The following permits -d:Mod to accepts arguments following an =
3118 in the fashion that -MSome::Mod does. */
3119 if (*s == ':' || *s == '=') {
3126 sv = newSVpvs("no Devel::");
3128 sv = newSVpvs("use Devel::");
3132 end = s + strlen(s);
3134 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3135 while(isALNUM(*s) || *s==':') ++s;
3137 sv_catpvn(sv, start, end - start);
3139 sv_catpvn(sv, start, s-start);
3140 /* Don't use NUL as q// delimiter here, this string goes in the
3142 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3145 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3149 PL_perldb = PERLDB_ALL;
3156 forbid_setid('D', FALSE);
3158 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3159 #else /* !DEBUGGING */
3160 if (ckWARN_d(WARN_DEBUGGING))
3161 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3162 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3163 for (s++; isALNUM(*s); s++) ;
3170 Safefree(PL_inplace);
3171 #if defined(__CYGWIN__) /* do backup extension automagically */
3172 if (*(s+1) == '\0') {
3173 PL_inplace = savepvs(".bak");
3176 #endif /* __CYGWIN__ */
3178 const char * const start = ++s;
3179 while (*s && !isSPACE(*s))
3182 PL_inplace = savepvn(start, s - start);
3186 if (*s == '-') /* Additional switches on #! line. */
3190 case 'I': /* -I handled both here and in parse_body() */
3191 forbid_setid('I', FALSE);
3193 while (*s && isSPACE(*s))
3198 /* ignore trailing spaces (possibly followed by other switches) */
3200 for (e = p; *e && !isSPACE(*e); e++) ;
3204 } while (*p && *p != '-');
3206 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3212 Perl_croak(aTHX_ "No directory specified for -I");
3218 SvREFCNT_dec(PL_ors_sv);
3224 PL_ors_sv = newSVpvs("\n");
3225 numlen = 3 + (*s == '0');
3226 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3230 if (RsPARA(PL_rs)) {
3231 PL_ors_sv = newSVpvs("\n\n");
3234 PL_ors_sv = newSVsv(PL_rs);
3239 forbid_setid('M', FALSE); /* XXX ? */
3242 forbid_setid('m', FALSE); /* XXX ? */
3247 const char *use = "use ";
3249 /* -M-foo == 'no foo' */
3250 /* Leading space on " no " is deliberate, to make both
3251 possibilities the same length. */
3252 if (*s == '-') { use = " no "; ++s; }
3253 sv = newSVpvn(use,4);
3255 /* We allow -M'Module qw(Foo Bar)' */
3256 while(isALNUM(*s) || *s==':') {
3265 Perl_croak(aTHX_ "Module name required with -%c option",
3268 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3269 "contains single ':'",
3270 (int)(s - start), start, option);
3271 end = s + strlen(s);
3273 sv_catpvn(sv, start, end - start);
3274 if (option == 'm') {
3276 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3277 sv_catpvs( sv, " ()");
3280 sv_catpvn(sv, start, s-start);
3281 /* Use NUL as q''-delimiter. */
3282 sv_catpvs(sv, " split(/,/,q\0");
3284 sv_catpvn(sv, s, end - s);
3285 sv_catpvs(sv, "\0)");
3288 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3291 Perl_croak(aTHX_ "Missing argument to -%c", option);
3302 forbid_setid('s', FALSE);
3303 PL_doswitches = TRUE;
3313 PL_do_undump = TRUE;
3323 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3324 PL_dowarn |= G_WARN_ON;
3329 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3330 if (!specialWARN(PL_compiling.cop_warnings))
3331 PerlMemShared_free(PL_compiling.cop_warnings);
3332 PL_compiling.cop_warnings = pWARN_ALL ;
3336 PL_dowarn = G_WARN_ALL_OFF;
3337 if (!specialWARN(PL_compiling.cop_warnings))
3338 PerlMemShared_free(PL_compiling.cop_warnings);
3339 PL_compiling.cop_warnings = pWARN_NONE ;
3346 if (s[0] == '-') /* Additional switches on #! line. */
3351 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3357 #ifdef ALTERNATE_SHEBANG
3358 case 'S': /* OS/2 needs -S on "extproc" line. */
3361 case 'e': case 'f': case 'x': case 'E':
3362 #ifndef ALTERNATE_SHEBANG
3366 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3369 "Unrecognized switch: -%.1s (-h will show valid options)",s
3379 if (!sv_derived_from(PL_patchlevel, "version"))
3380 upg_version(PL_patchlevel, TRUE);
3383 SV* level= vstringify(PL_patchlevel);
3384 #ifdef PERL_PATCHNUM
3385 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3386 SV *num = newSVpvs(PERL_PATCHNUM "*");
3388 SV *num = newSVpvs(PERL_PATCHNUM);
3391 if (sv_len(num)>=sv_len(level) && strnEQ(SvPV_nolen(num),SvPV_nolen(level),sv_len(level))) {
3392 SvREFCNT_dec(level);
3395 Perl_sv_catpvf(aTHX_ level, " (%"SVf")", num);
3399 PerlIO_printf(PerlIO_stdout(),
3400 "\nThis is perl " STRINGIFY(PERL_REVISION)
3401 ", version " STRINGIFY(PERL_VERSION)
3402 ", subversion " STRINGIFY(PERL_SUBVERSION)
3403 " (%"SVf") built for " ARCHNAME, level
3405 SvREFCNT_dec(level);
3408 /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */
3409 PerlIO_printf(PerlIO_stdout(),
3410 Perl_form(aTHX_ "\nThis is perl, %"SVf"\n",
3411 SVfARG(vstringify(PL_patchlevel))));
3412 PerlIO_printf(PerlIO_stdout(),
3413 Perl_form(aTHX_ " built under %s at %s %s\n",
3414 OSNAME, __DATE__, __TIME__));
3415 PerlIO_printf(PerlIO_stdout(),
3416 Perl_form(aTHX_ " OS Specific Release: %s\n",
3419 #if defined(LOCAL_PATCH_COUNT)
3420 if (LOCAL_PATCH_COUNT > 0)
3421 PerlIO_printf(PerlIO_stdout(),
3422 "\n(with %d registered patch%s, "
3423 "see perl -V for more detail)",
3425 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3428 PerlIO_printf(PerlIO_stdout(),
3429 "\n\nCopyright 1987-2012, Larry Wall\n");
3431 PerlIO_printf(PerlIO_stdout(),
3432 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3435 PerlIO_printf(PerlIO_stdout(),
3436 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3437 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3440 PerlIO_printf(PerlIO_stdout(),
3441 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3442 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3445 PerlIO_printf(PerlIO_stdout(),
3446 "atariST series port, ++jrb bammi@cadence.com\n");
3449 PerlIO_printf(PerlIO_stdout(),
3450 "BeOS port Copyright Tom Spindler, 1997-1999\n");
3453 PerlIO_printf(PerlIO_stdout(),
3454 "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n");
3457 PerlIO_printf(PerlIO_stdout(),
3458 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3461 PerlIO_printf(PerlIO_stdout(),
3462 "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n");
3465 PerlIO_printf(PerlIO_stdout(),
3466 "VM/ESA port by Neale Ferguson, 1998-1999\n");
3469 PerlIO_printf(PerlIO_stdout(),
3470 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3473 PerlIO_printf(PerlIO_stdout(),
3474 "EPOC port by Olaf Flebbe, 1999-2002\n");
3477 PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n");
3478 PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n");
3481 #ifdef __SYMBIAN32__
3482 PerlIO_printf(PerlIO_stdout(),
3483 "Symbian port by Nokia, 2004-2005\n");
3485 #ifdef BINARY_BUILD_NOTICE
3486 BINARY_BUILD_NOTICE;
3488 PerlIO_printf(PerlIO_stdout(),
3490 Perl may be copied only under the terms of either the Artistic License or the\n\
3491 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3492 Complete documentation for Perl, including FAQ lists, should be found on\n\
3493 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3494 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3498 /* compliments of Tom Christiansen */
3500 /* unexec() can be found in the Gnu emacs distribution */
3501 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3504 Perl_my_unexec(pTHX)
3506 PERL_UNUSED_CONTEXT;
3508 SV * prog = newSVpv(BIN_EXP, 0);
3509 SV * file = newSVpv(PL_origfilename, 0);
3513 sv_catpvs(prog, "/perl");
3514 sv_catpvs(file, ".perldump");
3516 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3517 /* unexec prints msg to stderr in case of failure */
3518 PerlProc_exit(status);
3521 # include <lib$routines.h>
3522 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3523 # elif defined(WIN32) || defined(__CYGWIN__)
3524 Perl_croak(aTHX_ "dump is not supported");
3526 ABORT(); /* for use with undump */
3531 /* initialize curinterp */
3537 # define PERLVAR(prefix,var,type)
3538 # define PERLVARA(prefix,var,n,type)
3539 # if defined(PERL_IMPLICIT_CONTEXT)
3540 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3541 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3543 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3544 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3546 # include "intrpvar.h"
3552 # define PERLVAR(prefix,var,type)
3553 # define PERLVARA(prefix,var,n,type)
3554 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3555 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3556 # include "intrpvar.h"
3563 /* As these are inside a structure, PERLVARI isn't capable of initialising
3565 PL_reg_oldcurpm = PL_reg_curpm = NULL;
3566 PL_reg_poscache = PL_reg_starttry = NULL;
3570 S_init_main_stash(pTHX)
3575 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3576 /* We know that the string "main" will be in the global shared string
3577 table, so it's a small saving to use it rather than allocate another
3579 PL_curstname = newSVpvs_share("main");
3580 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3581 /* If we hadn't caused another reference to "main" to be in the shared
3582 string table above, then it would be worth reordering these two,
3583 because otherwise all we do is delete "main" from it as a consequence
3584 of the SvREFCNT_dec, only to add it again with hv_name_set */
3585 SvREFCNT_dec(GvHV(gv));
3586 hv_name_set(PL_defstash, "main", 4, 0);
3587 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3589 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3591 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3592 GvMULTI_on(PL_incgv);
3593 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3594 GvMULTI_on(PL_hintgv);
3595 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3596 SvREFCNT_inc_simple_void(PL_defgv);
3597 PL_errgv = gv_HVadd(gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV));
3598 SvREFCNT_inc_simple_void(PL_errgv);
3599 GvMULTI_on(PL_errgv);
3600 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3601 GvMULTI_on(PL_replgv);
3602 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3603 #ifdef PERL_DONT_CREATE_GVSV
3606 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3608 SET_CURSTASH(PL_defstash);
3609 CopSTASH_set(&PL_compiling, PL_defstash);
3610 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3611 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3613 /* We must init $/ before switches are processed. */
3614 sv_setpvs(get_sv("/", GV_ADD), "\n");
3618 S_open_script(pTHX_ const char *scriptname, bool dosearch,
3619 bool *suidscript, PerlIO **rsfpp)
3624 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3627 PL_origfilename = savepvs("-e");
3630 /* if find_script() returns, it returns a malloc()-ed value */
3631 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3633 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3634 const char *s = scriptname + 8;
3640 * Tell apart "normal" usage of fdscript, e.g.
3641 * with bash on FreeBSD:
3642 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3643 * from usage in suidperl.
3644 * Does any "normal" usage leave garbage after the number???
3645 * Is it a mistake to use a similar /dev/fd/ construct for
3650 * Be supersafe and do some sanity-checks.
3651 * Still, can we be sure we got the right thing?
3654 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3657 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3659 scriptname = savepv(s + 1);
3660 Safefree(PL_origfilename);
3661 PL_origfilename = (char *)scriptname;
3666 CopFILE_free(PL_curcop);
3667 CopFILE_set(PL_curcop, PL_origfilename);
3668 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3669 scriptname = (char *)"";
3670 if (fdscript >= 0) {
3671 *rsfpp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3672 # if defined(HAS_FCNTL) && defined(F_SETFD)
3674 /* ensure close-on-exec */
3675 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3678 else if (!*scriptname) {
3679 forbid_setid(0, *suidscript);
3680 *rsfpp = PerlIO_stdin();
3683 #ifdef FAKE_BIT_BUCKET
3684 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3685 * is called) and still have the "-e" work. (Believe it or not,
3686 * a /dev/null is required for the "-e" to work because source
3687 * filter magic is used to implement it. ) This is *not* a general
3688 * replacement for a /dev/null. What we do here is create a temp
3689 * file (an empty file), open up that as the script, and then
3690 * immediately close and unlink it. Close enough for jazz. */
3691 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3692 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3693 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3694 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3695 FAKE_BIT_BUCKET_TEMPLATE
3697 const char * const err = "Failed to create a fake bit bucket";
3698 if (strEQ(scriptname, BIT_BUCKET)) {
3699 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3700 int tmpfd = mkstemp(tmpname);
3702 scriptname = tmpname;
3705 Perl_croak(aTHX_ err);
3708 scriptname = mktemp(tmpname);
3710 Perl_croak(aTHX_ err);
3715 *rsfpp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3716 #ifdef FAKE_BIT_BUCKET
3717 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3718 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3719 && strlen(scriptname) == sizeof(tmpname) - 1) {
3722 scriptname = BIT_BUCKET;
3724 # if defined(HAS_FCNTL) && defined(F_SETFD)
3726 /* ensure close-on-exec */
3727 fcntl(PerlIO_fileno(*rsfpp),F_SETFD,1);
3731 /* PSz 16 Sep 03 Keep neat error message */
3733 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3735 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3736 CopFILE(PL_curcop), Strerror(errno));
3742 * I_SYSSTATVFS HAS_FSTATVFS
3744 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3745 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3746 * here so that metaconfig picks them up. */
3749 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3750 /* Don't even need this function. */
3753 S_validate_suid(pTHX_ PerlIO *rsfp)
3755 PERL_ARGS_ASSERT_VALIDATE_SUID;
3757 if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */
3760 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3761 if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3763 (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3766 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3767 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3768 /* not set-id, must be wrapped */
3771 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3774 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3778 register const char *s2;
3780 PERL_ARGS_ASSERT_FIND_BEGINNING;
3782 /* skip forward in input to the real script? */
3785 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3786 Perl_croak(aTHX_ "No Perl script found in input\n");
3788 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3789 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3790 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3792 while (*s == ' ' || *s == '\t') s++;
3794 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3795 || s2[-1] == '_') s2--;
3796 if (strnEQ(s2-4,"perl",4))
3797 while ((s = moreswitches(s)))
3807 PL_uid = PerlProc_getuid();
3808 PL_euid = PerlProc_geteuid();
3809 PL_gid = PerlProc_getgid();
3810 PL_egid = PerlProc_getegid();
3812 PL_uid |= PL_gid << 16;
3813 PL_euid |= PL_egid << 16;
3815 /* Should not happen: */
3816 CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3817 PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
3820 * Should go by suidscript, not uid!=euid: why disallow
3821 * system("ls") in scripts run from setuid things?
3822 * Or, is this run before we check arguments and set suidscript?
3823 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3824 * (We never have suidscript, can we be sure to have fdscript?)
3825 * Or must then go by UID checks? See comments in forbid_setid also.
3829 /* This is used very early in the lifetime of the program,
3830 * before even the options are parsed, so PL_tainting has
3831 * not been initialized properly. */
3833 Perl_doing_taint(int argc, char *argv[], char *envp[])
3835 #ifndef PERL_IMPLICIT_SYS
3836 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3837 * before we have an interpreter-- and the whole point of this
3838 * function is to be called at such an early stage. If you are on
3839 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3840 * "tainted because running with altered effective ids', you'll
3841 * have to add your own checks somewhere in here. The two most
3842 * known samples of 'implicitness' are Win32 and NetWare, neither
3843 * of which has much of concept of 'uids'. */
3844 int uid = PerlProc_getuid();
3845 int euid = PerlProc_geteuid();
3846 int gid = PerlProc_getgid();
3847 int egid = PerlProc_getegid();
3854 if (uid && (euid != uid || egid != gid))
3856 #endif /* !PERL_IMPLICIT_SYS */
3857 /* This is a really primitive check; environment gets ignored only
3858 * if -T are the first chars together; otherwise one gets
3859 * "Too late" message. */
3860 if ( argc > 1 && argv[1][0] == '-'
3861 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3866 /* Passing the flag as a single char rather than a string is a slight space
3867 optimisation. The only message that isn't /^-.$/ is
3868 "program input from stdin", which is substituted in place of '\0', which
3869 could never be a command line flag. */
3871 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3874 char string[3] = "-x";
3875 const char *message = "program input from stdin";
3882 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3883 if (PL_euid != PL_uid)
3884 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3885 if (PL_egid != PL_gid)
3886 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3887 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3889 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3893 Perl_init_dbargs(pTHX)
3895 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3900 /* Someone has already created it.
3901 It might have entries, and if we just turn off AvREAL(), they will
3902 "leak" until global destruction. */
3904 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
3905 Perl_croak(aTHX_ "Cannot set tied @DB::args");
3907 AvREIFY_only(PL_dbargs);
3911 Perl_init_debugger(pTHX)
3914 HV * const ostash = PL_curstash;
3916 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
3918 Perl_init_dbargs(aTHX);
3919 PL_DBgv = gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV);
3920 PL_DBline = gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV);
3921 PL_DBsub = gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV));
3922 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3923 if (!SvIOK(PL_DBsingle))
3924 sv_setiv(PL_DBsingle, 0);
3925 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3926 if (!SvIOK(PL_DBtrace))
3927 sv_setiv(PL_DBtrace, 0);
3928 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3929 if (!SvIOK(PL_DBsignal))
3930 sv_setiv(PL_DBsignal, 0);
3931 SvREFCNT_dec(PL_curstash);
3932 PL_curstash = ostash;
3935 #ifndef STRESS_REALLOC
3936 #define REASONABLE(size) (size)
3938 #define REASONABLE(size) (1) /* unreasonable */
3942 Perl_init_stacks(pTHX)
3945 /* start with 128-item stack and 8K cxstack */
3946 PL_curstackinfo = new_stackinfo(REASONABLE(128),
3947 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
3948 PL_curstackinfo->si_type = PERLSI_MAIN;
3949 PL_curstack = PL_curstackinfo->si_stack;
3950 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
3952 PL_stack_base = AvARRAY(PL_curstack);
3953 PL_stack_sp = PL_stack_base;
3954 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
3956 Newx(PL_tmps_stack,REASONABLE(128),SV*);
3959 PL_tmps_max = REASONABLE(128);
3961 Newx(PL_markstack,REASONABLE(32),I32);
3962 PL_markstack_ptr = PL_markstack;
3963 PL_markstack_max = PL_markstack + REASONABLE(32);
3967 Newx(PL_scopestack,REASONABLE(32),I32);
3969 Newx(PL_scopestack_name,REASONABLE(32),const char*);
3971 PL_scopestack_ix = 0;
3972 PL_scopestack_max = REASONABLE(32);
3974 Newx(PL_savestack,REASONABLE(128),ANY);
3975 PL_savestack_ix = 0;
3976 PL_savestack_max = REASONABLE(128);
3985 while (PL_curstackinfo->si_next)
3986 PL_curstackinfo = PL_curstackinfo->si_next;
3987 while (PL_curstackinfo) {
3988 PERL_SI *p = PL_curstackinfo->si_prev;
3989 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
3990 Safefree(PL_curstackinfo->si_cxstack);
3991 Safefree(PL_curstackinfo);
3992 PL_curstackinfo = p;
3994 Safefree(PL_tmps_stack);
3995 Safefree(PL_markstack);
3996 Safefree(PL_scopestack);
3998 Safefree(PL_scopestack_name);
4000 Safefree(PL_savestack);
4004 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4006 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4007 AV *const isa = GvAVn(gv);
4010 PERL_ARGS_ASSERT_POPULATE_ISA;
4012 if(AvFILLp(isa) != -1)
4015 /* NOTE: No support for tied ISA */
4017 va_start(args, len);
4019 const char *const parent = va_arg(args, const char*);
4024 parent_len = va_arg(args, size_t);
4026 /* Arguments are supplied with a trailing :: */
4027 assert(parent_len > 2);
4028 assert(parent[parent_len - 1] == ':');
4029 assert(parent[parent_len - 2] == ':');
4030 av_push(isa, newSVpvn(parent, parent_len - 2));
4031 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4038 S_init_predump_symbols(pTHX)
4044 sv_setpvs(get_sv("\"", GV_ADD), " ");
4045 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4048 /* Historically, PVIOs were blessed into IO::Handle, unless
4049 FileHandle was loaded, in which case they were blessed into
4050 that. Action at a distance.
4051 However, if we simply bless into IO::Handle, we break code
4052 that assumes that PVIOs will have (among others) a seek
4053 method. IO::File inherits from IO::Handle and IO::Seekable,
4054 and provides the needed methods. But if we simply bless into
4055 it, then we break code that assumed that by loading
4056 IO::Handle, *it* would work.
4057 So a compromise is to set up the correct @IO::File::ISA,
4058 so that code that does C<use IO::Handle>; will still work.
4061 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4062 STR_WITH_LEN("IO::Handle::"),
4063 STR_WITH_LEN("IO::Seekable::"),
4064 STR_WITH_LEN("Exporter::"),
4067 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4068 GvMULTI_on(PL_stdingv);
4069 io = GvIOp(PL_stdingv);
4070 IoTYPE(io) = IoTYPE_RDONLY;
4071 IoIFP(io) = PerlIO_stdin();
4072 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4074 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4076 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4079 IoTYPE(io) = IoTYPE_WRONLY;
4080 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4082 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4084 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4086 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4087 GvMULTI_on(PL_stderrgv);
4088 io = GvIOp(PL_stderrgv);
4089 IoTYPE(io) = IoTYPE_WRONLY;
4090 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4091 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4093 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4095 PL_statname = newSVpvs(""); /* last filename we did stat on */
4099 Perl_init_argv_symbols(pTHX_ register int argc, register char **argv)
4103 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4105 argc--,argv++; /* skip name of script */
4106 if (PL_doswitches) {
4107 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4111 if (argv[0][1] == '-' && !argv[0][2]) {
4115 if ((s = strchr(argv[0], '='))) {
4116 const char *const start_name = argv[0] + 1;
4117 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4118 TRUE, SVt_PV)), s + 1);
4121 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4124 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4125 GvMULTI_on(PL_argvgv);
4126 (void)gv_AVadd(PL_argvgv);
4127 av_clear(GvAVn(PL_argvgv));
4128 for (; argc > 0; argc--,argv++) {
4129 SV * const sv = newSVpv(argv[0],0);
4130 av_push(GvAVn(PL_argvgv),sv);
4131 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4132 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4135 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4136 (void)sv_utf8_decode(sv);
4142 S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env)
4147 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4149 PL_toptarget = newSV_type(SVt_PVFM);
4150 sv_setpvs(PL_toptarget, "");
4151 PL_bodytarget = newSV_type(SVt_PVFM);
4152 sv_setpvs(PL_bodytarget, "");
4153 PL_formtarget = PL_bodytarget;
4157 init_argv_symbols(argc,argv);
4159 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4160 sv_setpv(GvSV(tmpgv),PL_origfilename);
4162 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4164 bool env_is_not_environ;
4165 GvMULTI_on(PL_envgv);
4166 hv = GvHVn(PL_envgv);
4167 hv_magic(hv, NULL, PERL_MAGIC_env);
4169 #ifdef USE_ENVIRON_ARRAY
4170 /* Note that if the supplied env parameter is actually a copy
4171 of the global environ then it may now point to free'd memory
4172 if the environment has been modified since. To avoid this
4173 problem we treat env==NULL as meaning 'use the default'
4177 env_is_not_environ = env != environ;
4178 if (env_is_not_environ
4179 # ifdef USE_ITHREADS
4180 && PL_curinterp == aTHX
4189 for (; *env; env++) {
4192 if (!(s = strchr(old_var,'=')) || s == old_var)
4195 #if defined(MSDOS) && !defined(DJGPP)
4197 (void)strupr(old_var);
4200 sv = newSVpv(s+1, 0);
4201 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4202 if (env_is_not_environ)
4206 #endif /* USE_ENVIRON_ARRAY */
4207 #endif /* !PERL_MICRO */
4211 /* touch @F array to prevent spurious warnings 20020415 MJD */
4213 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4218 S_init_perllib(pTHX)
4222 const char *perl5lib = NULL;
4225 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4231 perl5lib = PerlEnv_getenv("PERL5LIB");
4233 * It isn't possible to delete an environment variable with
4234 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4235 * case we treat PERL5LIB as undefined if it has a zero-length value.
4237 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4238 if (perl5lib && *perl5lib != '\0')
4242 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4244 s = PerlEnv_getenv("PERLLIB");
4246 incpush_use_sep(s, 0, 0);
4249 /* Treat PERL5?LIB as a possible search list logical name -- the
4250 * "natural" VMS idiom for a Unix path string. We allow each
4251 * element to be a set of |-separated directories for compatibility.
4255 if (my_trnlnm("PERL5LIB",buf,0))
4257 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4258 } while (my_trnlnm("PERL5LIB",buf,++idx));
4260 while (my_trnlnm("PERLLIB",buf,idx++))
4261 incpush_use_sep(buf, 0, 0);
4266 #ifndef PERL_IS_MINIPERL
4267 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4268 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4270 /* Use the ~-expanded versions of APPLLIB (undocumented),
4271 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4274 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4275 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4279 /* sitearch is always relative to sitelib on Windows for
4280 * DLL-based path intuition to work correctly */
4281 # if !defined(WIN32)
4282 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4283 INCPUSH_CAN_RELOCATE);
4289 /* this picks up sitearch as well */
4290 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4292 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4294 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4298 #ifdef PERL_VENDORARCH_EXP
4299 /* vendorarch is always relative to vendorlib on Windows for
4300 * DLL-based path intuition to work correctly */
4301 # if !defined(WIN32)
4302 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4303 INCPUSH_CAN_RELOCATE);
4307 #ifdef PERL_VENDORLIB_EXP
4309 /* this picks up vendorarch as well */
4310 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4312 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4314 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4315 INCPUSH_CAN_RELOCATE);
4320 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4324 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4328 s = win32_get_privlib(PERL_FS_VERSION, &len);
4330 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4333 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4335 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4339 #ifdef PERL_OTHERLIBDIRS
4340 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4341 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4342 |INCPUSH_CAN_RELOCATE);
4348 * It isn't possible to delete an environment variable with
4349 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4350 * case we treat PERL5LIB as undefined if it has a zero-length value.
4352 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4353 if (perl5lib && *perl5lib != '\0')
4357 incpush_use_sep(perl5lib, 0,
4358 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4360 /* Treat PERL5?LIB as a possible search list logical name -- the
4361 * "natural" VMS idiom for a Unix path string. We allow each
4362 * element to be a set of |-separated directories for compatibility.
4366 if (my_trnlnm("PERL5LIB",buf,0))
4368 incpush_use_sep(buf, 0,
4369 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4370 } while (my_trnlnm("PERL5LIB",buf,++idx));
4374 /* Use the ~-expanded versions of APPLLIB (undocumented),
4375 SITELIB and VENDORLIB for older versions
4378 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4379 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4382 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4383 /* Search for version-specific dirs below here */
4384 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4385 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4389 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4390 /* Search for version-specific dirs below here */
4391 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4392 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4395 #ifdef PERL_OTHERLIBDIRS
4396 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4397 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4398 |INCPUSH_CAN_RELOCATE);
4400 #endif /* !PERL_IS_MINIPERL */
4403 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4406 #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__)
4407 # define PERLLIB_SEP ';'
4410 # define PERLLIB_SEP '|'
4412 # define PERLLIB_SEP ':'
4415 #ifndef PERLLIB_MANGLE
4416 # define PERLLIB_MANGLE(s,n) (s)
4419 #ifndef PERL_IS_MINIPERL
4420 /* Push a directory onto @INC if it exists.
4421 Generate a new SV if we do this, to save needing to copy the SV we push
4424 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4429 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4431 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4432 S_ISDIR(tmpstatbuf.st_mode)) {
4434 dir = newSVsv(stem);
4436 /* Truncate dir back to stem. */
4437 SvCUR_set(dir, SvCUR(stem));
4444 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4446 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4449 PERL_ARGS_ASSERT_MAYBERELOCATE;
4453 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4454 defined to so something (in os2/os2.c), but the code has been
4455 this way, ignoring any possible changed of length, since
4456 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4458 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4460 libdir = newSVpv(PERLLIB_MANGLE(dir, 0), 0);
4467 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4469 while (unix[len-1] == '/') len--; /* Cosmetic */
4470 sv_usepvn(libdir,unix,len);
4473 PerlIO_printf(Perl_error_log,
4474 "Failed to unixify @INC element \"%s\"\n",
4475 SvPV_nolen_const(libdir));
4479 /* Do the if() outside the #ifdef to avoid warnings about an unused
4482 #ifdef PERL_RELOCATABLE_INC
4484 * Relocatable include entries are marked with a leading .../
4487 * 0: Remove that leading ".../"
4488 * 1: Remove trailing executable name (anything after the last '/')
4489 * from the perl path to give a perl prefix
4491 * While the @INC element starts "../" and the prefix ends with a real
4492 * directory (ie not . or ..) chop that real directory off the prefix
4493 * and the leading "../" from the @INC element. ie a logical "../"
4495 * Finally concatenate the prefix and the remainder of the @INC element
4496 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4497 * generates /usr/local/lib/perl5
4499 const char *libpath = SvPVX(libdir);
4500 STRLEN libpath_len = SvCUR(libdir);
4501 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4503 SV * const caret_X = get_sv("\030", 0);
4504 /* Going to use the SV just as a scratch buffer holding a C
4510 /* $^X is *the* source of taint if tainting is on, hence
4511 SvPOK() won't be true. */
4513 assert(SvPOKp(caret_X));
4514 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4516 /* Firstly take off the leading .../
4517 If all else fail we'll do the paths relative to the current
4519 sv_chop(libdir, libpath + 4);
4520 /* Don't use SvPV as we're intentionally bypassing taining,
4521 mortal copies that the mg_get of tainting creates, and
4522 corruption that seems to come via the save stack.
4523 I guess that the save stack isn't correctly set up yet. */
4524 libpath = SvPVX(libdir);
4525 libpath_len = SvCUR(libdir);
4527 /* This would work more efficiently with memrchr, but as it's
4528 only a GNU extension we'd need to probe for it and
4529 implement our own. Not hard, but maybe not worth it? */
4531 prefix = SvPVX(prefix_sv);
4532 lastslash = strrchr(prefix, '/');
4534 /* First time in with the *lastslash = '\0' we just wipe off
4535 the trailing /perl from (say) /usr/foo/bin/perl
4539 while ((*lastslash = '\0'), /* Do that, come what may. */
4540 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4541 && (lastslash = strrchr(prefix, '/')))) {
4542 if (lastslash[1] == '\0'
4543 || (lastslash[1] == '.'
4544 && (lastslash[2] == '/' /* ends "/." */
4545 || (lastslash[2] == '/'
4546 && lastslash[3] == '/' /* or "/.." */
4548 /* Prefix ends "/" or "/." or "/..", any of which
4549 are fishy, so don't do any more logical cleanup.
4553 /* Remove leading "../" from path */
4556 /* Next iteration round the loop removes the last
4557 directory name from prefix by writing a '\0' in
4558 the while clause. */
4560 /* prefix has been terminated with a '\0' to the correct
4561 length. libpath points somewhere into the libdir SV.
4562 We need to join the 2 with '/' and drop the result into
4564 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4565 SvREFCNT_dec(libdir);
4566 /* And this is the new libdir. */
4569 (PL_uid != PL_euid || PL_gid != PL_egid)) {
4570 /* Need to taint relocated paths if running set ID */
4571 SvTAINTED_on(libdir);
4574 SvREFCNT_dec(prefix_sv);
4582 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4585 #ifndef PERL_IS_MINIPERL
4586 const U8 using_sub_dirs
4587 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4588 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4589 const U8 add_versioned_sub_dirs
4590 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4591 const U8 add_archonly_sub_dirs
4592 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4593 #ifdef PERL_INC_VERSION_LIST
4594 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4597 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4598 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4599 AV *const inc = GvAVn(PL_incgv);
4601 PERL_ARGS_ASSERT_INCPUSH;
4604 /* Could remove this vestigial extra block, if we don't mind a lot of
4605 re-indenting diff noise. */
4607 SV *const libdir = mayberelocate(dir, len, flags);
4608 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4609 arranged to unshift #! line -I onto the front of @INC. However,
4610 -I can add version and architecture specific libraries, and they
4611 need to go first. The old code assumed that it was always
4612 pushing. Hence to make it work, need to push the architecture
4613 (etc) libraries onto a temporary array, then "unshift" that onto
4614 the front of @INC. */
4615 #ifndef PERL_IS_MINIPERL
4616 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4619 * BEFORE pushing libdir onto @INC we may first push version- and
4620 * archname-specific sub-directories.
4622 if (using_sub_dirs) {
4623 SV *subdir = newSVsv(libdir);
4624 #ifdef PERL_INC_VERSION_LIST
4625 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4626 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4627 const char * const *incver;
4630 if (add_versioned_sub_dirs) {
4631 /* .../version/archname if -d .../version/archname */
4632 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4633 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4635 /* .../version if -d .../version */
4636 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4637 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4640 #ifdef PERL_INC_VERSION_LIST
4642 for (incver = incverlist; *incver; incver++) {
4643 /* .../xxx if -d .../xxx */
4644 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4645 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4650 if (add_archonly_sub_dirs) {
4651 /* .../archname if -d .../archname */
4652 sv_catpvs(subdir, "/" ARCHNAME);
4653 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4657 assert (SvREFCNT(subdir) == 1);
4658 SvREFCNT_dec(subdir);
4660 #endif /* !PERL_IS_MINIPERL */
4661 /* finally add this lib directory at the end of @INC */
4663 #ifdef PERL_IS_MINIPERL
4664 const U32 extra = 0;
4666 U32 extra = av_len(av) + 1;
4668 av_unshift(inc, extra + push_basedir);
4670 av_store(inc, extra, libdir);
4671 #ifndef PERL_IS_MINIPERL
4673 /* av owns a reference, av_store() expects to be donated a
4674 reference, and av expects to be sane when it's cleared.
4675 If I wanted to be naughty and wrong, I could peek inside the
4676 implementation of av_clear(), realise that it uses
4677 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4678 and so directly steal from it (with a memcpy() to inc, and
4679 then memset() to NULL them out. But people copy code from the
4680 core expecting it to be best practise, so let's use the API.
4681 Although studious readers will note that I'm not checking any
4683 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4688 else if (push_basedir) {
4689 av_push(inc, libdir);
4692 if (!push_basedir) {
4693 assert (SvREFCNT(libdir) == 1);
4694 SvREFCNT_dec(libdir);
4700 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4704 /* This logic has been broken out from S_incpush(). It may be possible to
4707 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4709 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4710 * argument to incpush_use_sep. This allows creation of relocatable
4711 * Perl distributions that patch the binary at install time. Those
4712 * distributions will have to provide their own relocation tools; this
4713 * is not a feature otherwise supported by core Perl.
4715 #ifndef PERL_RELOCATABLE_INCPUSH
4722 /* Break at all separators */
4723 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4725 /* skip any consecutive separators */
4727 /* Uncomment the next line for PATH semantics */
4728 /* But you'll need to write tests */
4729 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4731 incpush(p, (STRLEN)(s - p), flags);
4736 incpush(p, (STRLEN)(end - p), flags);
4741 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4745 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4751 PERL_ARGS_ASSERT_CALL_LIST;
4753 while (av_len(paramList) >= 0) {
4754 cv = MUTABLE_CV(av_shift(paramList));
4756 if (paramList == PL_beginav) {
4757 /* save PL_beginav for compiler */
4758 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4760 else if (paramList == PL_checkav) {
4761 /* save PL_checkav for compiler */
4762 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4764 else if (paramList == PL_unitcheckav) {
4765 /* save PL_unitcheckav for compiler */
4766 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4777 PL_madskills |= 16384;
4782 PL_madskills &= ~16384;
4785 (void)SvPV_const(atsv, len);
4787 PL_curcop = &PL_compiling;
4788 CopLINE_set(PL_curcop, oldline);
4789 if (paramList == PL_beginav)
4790 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4792 Perl_sv_catpvf(aTHX_ atsv,
4793 "%s failed--call queue aborted",
4794 paramList == PL_checkav ? "CHECK"
4795 : paramList == PL_initav ? "INIT"
4796 : paramList == PL_unitcheckav ? "UNITCHECK"
4798 while (PL_scopestack_ix > oldscope)
4801 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4808 /* my_exit() was called */
4809 while (PL_scopestack_ix > oldscope)
4812 SET_CURSTASH(PL_defstash);
4813 PL_curcop = &PL_compiling;
4814 CopLINE_set(PL_curcop, oldline);
4820 PL_curcop = &PL_compiling;
4821 CopLINE_set(PL_curcop, oldline);
4824 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
4833 Perl_my_exit(pTHX_ U32 status)
4844 STATUS_EXIT_SET(status);
4851 Perl_my_failure_exit(pTHX)
4855 /* We have been called to fall on our sword. The desired exit code
4856 * should be already set in STATUS_UNIX, but could be shifted over
4857 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4860 * If an error code has not been set, then force the issue.
4862 if (MY_POSIX_EXIT) {
4864 /* According to the die_exit.t tests, if errno is non-zero */
4865 /* It should be used for the error status. */
4867 if (errno == EVMSERR) {
4868 STATUS_NATIVE = vaxc$errno;
4871 /* According to die_exit.t tests, if the child_exit code is */
4872 /* also zero, then we need to exit with a code of 255 */
4873 if ((errno != 0) && (errno < 256))
4874 STATUS_UNIX_EXIT_SET(errno);
4875 else if (STATUS_UNIX < 255) {
4876 STATUS_UNIX_EXIT_SET(255);
4881 /* The exit code could have been set by $? or vmsish which
4882 * means that it may not have fatal set. So convert
4883 * success/warning codes to fatal with out changing
4884 * the POSIX status code. The severity makes VMS native
4885 * status handling work, while UNIX mode programs use the
4886 * the POSIX exit codes.
4888 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4889 STATUS_NATIVE &= STS$M_COND_ID;
4890 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4894 /* Traditionally Perl on VMS always expects a Fatal Error. */
4895 if (vaxc$errno & 1) {
4897 /* So force success status to failure */
4898 if (STATUS_NATIVE & 1)
4903 STATUS_UNIX = EINTR; /* In case something cares */
4908 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4910 /* Encode the severity code */
4911 severity = STATUS_NATIVE & STS$M_SEVERITY;
4912 STATUS_UNIX = (severity ? severity : 1) << 8;
4914 /* Perl expects this to be a fatal error */
4915 if (severity != STS$K_SEVERE)
4924 STATUS_UNIX_SET(errno);
4926 exitstatus = STATUS_UNIX >> 8;
4927 if (exitstatus & 255)
4928 STATUS_UNIX_SET(exitstatus);
4930 STATUS_UNIX_SET(255);
4937 S_my_exit_jump(pTHX)
4942 SvREFCNT_dec(PL_e_script);
4946 POPSTACK_TO(PL_mainstack);
4954 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
4957 const char * const p = SvPVX_const(PL_e_script);
4958 const char *nl = strchr(p, '\n');
4960 PERL_UNUSED_ARG(idx);
4961 PERL_UNUSED_ARG(maxlen);
4963 nl = (nl) ? nl+1 : SvEND(PL_e_script);
4965 filter_del(read_e_script);
4968 sv_catpvn(buf_sv, p, nl-p);
4969 sv_chop(PL_e_script, nl);
4975 * c-indentation-style: bsd
4977 * indent-tabs-mode: t
4980 * ex: set ts=8 sts=4 sw=4 noet: