/* perl.c * * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, * 2000, 2001, 2002, 2003, 2004, 2005, by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "A ship then new they built for him/of mithril and of elven glass" --Bilbo */ /* This file contains the top-level functions that are used to create, use * and destroy a perl interpreter, plus the functions used by XS code to * call back into perl. Note that it does not contain the actual main() * function of the interpreter; that can be found in perlmain.c */ /* PSz 12 Nov 03 * * Be proud that perl(1) may proclaim: * Setuid Perl scripts are safer than C programs ... * Do not abandon (deprecate) suidperl. Do not advocate C wrappers. * * The flow was: perl starts, notices script is suid, execs suidperl with same * arguments; suidperl opens script, checks many things, sets itself with * right UID, execs perl with similar arguments but with script pre-opened on * /dev/fd/xxx; perl checks script is as should be and does work. This was * insecure: see perlsec(1) for many problems with this approach. * * The "correct" flow should be: perl starts, opens script and notices it is * suid, checks many things, execs suidperl with similar arguments but with * script on /dev/fd/xxx; suidperl checks script and /dev/fd/xxx object are * same, checks arguments match #! line, sets itself with right UID, execs * perl with same arguments; perl checks many things and does work. * * (Opening the script in perl instead of suidperl, we "lose" scripts that * are readable to the target UID but not to the invoker. Where did * unreadable scripts work anyway?) * * For now, suidperl and perl are pretty much the same large and cumbersome * program, so suidperl can check its argument list (see comments elsewhere). * * References: * Original bug report: * http://bugs.perl.org/index.html?req=bug_id&bug_id=20010322.218 * http://rt.perl.org/rt2/Ticket/Display.html?id=6511 * Comments and discussion with Debian: * http://bugs.debian.org/203426 * http://bugs.debian.org/220486 * Debian Security Advisory DSA 431-1 (does not fully fix problem): * http://www.debian.org/security/2004/dsa-431 * CVE candidate: * http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2003-0618 * Previous versions of this patch sent to perl5-porters: * http://www.mail-archive.com/perl5-porters@perl.org/msg71953.html * http://www.mail-archive.com/perl5-porters@perl.org/msg75245.html * http://www.mail-archive.com/perl5-porters@perl.org/msg75563.html * http://www.mail-archive.com/perl5-porters@perl.org/msg75635.html * Paul Szabo - psz@maths.usyd.edu.au http://www.maths.usyd.edu.au:8000/u/psz/ School of Mathematics and Statistics University of Sydney 2006 Australia * */ /* PSz 13 Nov 03 * Use truthful, neat, specific error messages. * Cannot always hide the truth; security must not depend on doing so. */ /* PSz 18 Feb 04 * Use global(?), thread-local fdscript for easier checks. * (I do not understand how we could possibly get a thread race: * do not all threads go through the same initialization? Or in * fact, are not threads started only after we get the script and * so know what to do? Oh well, make things super-safe...) */ #include "EXTERN.h" #define PERL_IN_PERL_C #include "perl.h" #include "patchlevel.h" /* for local_patches */ #ifdef NETWARE #include "nwutil.h" char *nw_get_sitelib(const char *pl); #endif /* XXX If this causes problems, set i_unistd=undef in the hint file. */ #ifdef I_UNISTD #include #endif #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP # ifdef I_SYS_WAIT # include # endif # ifdef I_SYSUIO # include # endif union control_un { struct cmsghdr cm; char control[CMSG_SPACE(sizeof(int))]; }; #endif #ifdef __BEOS__ # define HZ 1000000 #endif #ifndef HZ # ifdef CLK_TCK # define HZ CLK_TCK # else # define HZ 60 # endif #endif #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO) char *getenv (char *); /* Usually in */ #endif static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen); #ifdef IAMSUID #ifndef DOSUID #define DOSUID #endif #endif /* IAMSUID */ #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW #ifdef DOSUID #undef DOSUID #endif #endif #ifndef NO_MATHOMS /* This reference ensures that the mathoms are linked with perl */ extern void Perl_mathoms(void); void Perl_mathoms_ref(void); void Perl_mathoms_ref(void) { Perl_mathoms(); } #endif static void S_init_tls_and_interp(PerlInterpreter *my_perl) { dVAR; if (!PL_curinterp) { PERL_SET_INTERP(my_perl); #if defined(USE_ITHREADS) INIT_THREADS; ALLOC_THREAD_KEY; PERL_SET_THX(my_perl); OP_REFCNT_INIT; MUTEX_INIT(&PL_dollarzero_mutex); # endif } else { PERL_SET_THX(my_perl); } } #ifdef PERL_IMPLICIT_SYS PerlInterpreter * perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS, struct IPerlMem* ipMP, struct IPerlEnv* ipE, struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO, struct IPerlDir* ipD, struct IPerlSock* ipS, struct IPerlProc* ipP) { PerlInterpreter *my_perl; /* Newx() needs interpreter, so call malloc() instead */ my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter)); S_init_tls_and_interp(my_perl); Zero(my_perl, 1, PerlInterpreter); PL_Mem = ipM; PL_MemShared = ipMS; PL_MemParse = ipMP; PL_Env = ipE; PL_StdIO = ipStd; PL_LIO = ipLIO; PL_Dir = ipD; PL_Sock = ipS; PL_Proc = ipP; return my_perl; } #else /* =head1 Embedding Functions =for apidoc perl_alloc Allocates a new Perl interpreter. See L. =cut */ PerlInterpreter * perl_alloc(void) { PerlInterpreter *my_perl; /* Newx() needs interpreter, so call malloc() instead */ my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter)); S_init_tls_and_interp(my_perl); return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter); } #endif /* PERL_IMPLICIT_SYS */ /* =for apidoc perl_construct Initializes a new Perl interpreter. See L. =cut */ void perl_construct(pTHXx) { dVAR; PERL_UNUSED_ARG(my_perl); #ifdef MULTIPLICITY init_interp(); PL_perl_destruct_level = 1; #else if (PL_perl_destruct_level > 0) init_interp(); #endif /* Init the real globals (and main thread)? */ if (!PL_linestr) { PL_curcop = &PL_compiling; /* needed by ckWARN, right away */ PL_linestr = NEWSV(65,79); sv_upgrade(PL_linestr,SVt_PVIV); if (!SvREADONLY(&PL_sv_undef)) { /* set read-only and try to insure than we wont see REFCNT==0 very often */ SvREADONLY_on(&PL_sv_undef); SvREFCNT(&PL_sv_undef) = (~(U32)0)/2; sv_setpv(&PL_sv_no,PL_No); /* value lookup in void context - happens to have the side effect of caching the numeric forms. */ SvIV(&PL_sv_no); SvNV(&PL_sv_no); SvREADONLY_on(&PL_sv_no); SvREFCNT(&PL_sv_no) = (~(U32)0)/2; sv_setpv(&PL_sv_yes,PL_Yes); SvIV(&PL_sv_yes); SvNV(&PL_sv_yes); SvREADONLY_on(&PL_sv_yes); SvREFCNT(&PL_sv_yes) = (~(U32)0)/2; SvREADONLY_on(&PL_sv_placeholder); SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2; } PL_sighandlerp = (Sighandler_t) Perl_sighandler; #ifdef PERL_USES_PL_PIDSTATUS PL_pidstatus = newHV(); #endif } PL_rs = newSVpvn("\n", 1); init_stacks(); init_ids(); PL_lex_state = LEX_NOTPARSING; JMPENV_BOOTSTRAP; STATUS_ALL_SUCCESS; init_i18nl10n(1); SET_NUMERIC_STANDARD(); #if defined(LOCAL_PATCH_COUNT) PL_localpatches = local_patches; /* For possible -v */ #endif #ifdef HAVE_INTERP_INTERN sys_intern_init(); #endif PerlIO_init(aTHX); /* Hook to IO system */ PL_fdpid = newAV(); /* for remembering popen pids by fd */ PL_modglobal = newHV(); /* pointers to per-interpreter module globals */ PL_errors = newSVpvn("",0); sv_setpvn(PERL_DEBUG_PAD(0), "", 0); /* For regex debugging. */ sv_setpvn(PERL_DEBUG_PAD(1), "", 0); /* ext/re needs these */ sv_setpvn(PERL_DEBUG_PAD(2), "", 0); /* even without DEBUGGING. */ #ifdef USE_ITHREADS PL_regex_padav = newAV(); av_push(PL_regex_padav,(SV*)newAV()); /* First entry is an array of empty elements */ PL_regex_pad = AvARRAY(PL_regex_padav); #endif #ifdef USE_REENTRANT_API Perl_reentrant_init(aTHX); #endif /* Note that strtab is a rather special HV. Assumptions are made about not iterating on it, and not adding tie magic to it. It is properly deallocated in perl_destruct() */ PL_strtab = newHV(); HvSHAREKEYS_off(PL_strtab); /* mandatory */ hv_ksplit(PL_strtab, 512); #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__)) _dyld_lookup_and_bind ("__environ", (unsigned long *) &environ_pointer, NULL); #endif /* environ */ #ifndef PERL_MICRO # ifdef USE_ENVIRON_ARRAY PL_origenviron = environ; # endif #endif /* Use sysconf(_SC_CLK_TCK) if available, if not * available or if the sysconf() fails, use the HZ. * BeOS has those, but returns the wrong value. * The HZ if not originally defined has been by now * been defined as CLK_TCK, if available. */ #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__) PL_clocktick = sysconf(_SC_CLK_TCK); if (PL_clocktick <= 0) #endif PL_clocktick = HZ; PL_stashcache = newHV(); PL_patchlevel = Perl_newSVpvf(aTHX_ "%d.%d.%d", (int)PERL_REVISION, (int)PERL_VERSION, (int)PERL_SUBVERSION); #ifdef HAS_MMAP if (!PL_mmap_page_size) { #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE)) { SETERRNO(0, SS_NORMAL); # ifdef _SC_PAGESIZE PL_mmap_page_size = sysconf(_SC_PAGESIZE); # else PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE); # endif if ((long) PL_mmap_page_size < 0) { if (errno) { SV * const error = ERRSV; (void) SvUPGRADE(error, SVt_PV); Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error)); } else Perl_croak(aTHX_ "panic: sysconf: pagesize unknown"); } } #else # ifdef HAS_GETPAGESIZE PL_mmap_page_size = getpagesize(); # else # if defined(I_SYS_PARAM) && defined(PAGESIZE) PL_mmap_page_size = PAGESIZE; /* compiletime, bad */ # endif # endif #endif if (PL_mmap_page_size <= 0) Perl_croak(aTHX_ "panic: bad pagesize %" IVdf, (IV) PL_mmap_page_size); } #endif /* HAS_MMAP */ #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE) PL_timesbase.tms_utime = 0; PL_timesbase.tms_stime = 0; PL_timesbase.tms_cutime = 0; PL_timesbase.tms_cstime = 0; #endif ENTER; } /* =for apidoc nothreadhook Stub that provides thread hook for perl_destruct when there are no threads. =cut */ int Perl_nothreadhook(pTHX) { return 0; } #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP void Perl_dump_sv_child(pTHX_ SV *sv) { ssize_t got; const int sock = PL_dumper_fd; const int debug_fd = PerlIO_fileno(Perl_debug_log); union control_un control; struct msghdr msg; struct iovec vec[2]; struct cmsghdr *cmptr; int returned_errno; unsigned char buffer[256]; if(sock == -1 || debug_fd == -1) return; PerlIO_flush(Perl_debug_log); /* All these shenanigans are to pass a file descriptor over to our child for it to dump out to. We can't let it hold open the file descriptor when it forks, as the file descriptor it will dump to can turn out to be one end of pipe that some other process will wait on for EOF. (So as it would be open, the wait would be forever. */ msg.msg_control = control.control; msg.msg_controllen = sizeof(control.control); /* We're a connected socket so we don't need a destination */ msg.msg_name = NULL; msg.msg_namelen = 0; msg.msg_iov = vec; msg.msg_iovlen = 1; cmptr = CMSG_FIRSTHDR(&msg); cmptr->cmsg_len = CMSG_LEN(sizeof(int)); cmptr->cmsg_level = SOL_SOCKET; cmptr->cmsg_type = SCM_RIGHTS; *((int *)CMSG_DATA(cmptr)) = 1; vec[0].iov_base = (void*)&sv; vec[0].iov_len = sizeof(sv); got = sendmsg(sock, &msg, 0); if(got < 0) { perror("Debug leaking scalars parent sendmsg failed"); abort(); } if(got < sizeof(sv)) { perror("Debug leaking scalars parent short sendmsg"); abort(); } /* Return protocol is int: errno value unsigned char: length of location string (0 for empty) unsigned char*: string (not terminated) */ vec[0].iov_base = (void*)&returned_errno; vec[0].iov_len = sizeof(returned_errno); vec[1].iov_base = buffer; vec[1].iov_len = 1; got = readv(sock, vec, 2); if(got < 0) { perror("Debug leaking scalars parent read failed"); PerlIO_flush(PerlIO_stderr()); abort(); } if(got < sizeof(returned_errno) + 1) { perror("Debug leaking scalars parent short read"); PerlIO_flush(PerlIO_stderr()); abort(); } if (*buffer) { got = read(sock, buffer + 1, *buffer); if(got < 0) { perror("Debug leaking scalars parent read 2 failed"); PerlIO_flush(PerlIO_stderr()); abort(); } if(got < *buffer) { perror("Debug leaking scalars parent short read 2"); PerlIO_flush(PerlIO_stderr()); abort(); } } if (returned_errno || *buffer) { Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno" " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1, returned_errno, strerror(returned_errno)); } } #endif /* =for apidoc perl_destruct Shuts down a Perl interpreter. See L. =cut */ int perl_destruct(pTHXx) { dVAR; volatile int destruct_level; /* 0=none, 1=full, 2=full with checks */ HV *hv; #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP pid_t child; #endif PERL_UNUSED_ARG(my_perl); /* wait for all pseudo-forked children to finish */ PERL_WAIT_FOR_CHILDREN; destruct_level = PL_perl_destruct_level; #ifdef DEBUGGING { const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL"); if (s) { const int i = atoi(s); if (destruct_level < i) destruct_level = i; } } #endif if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) { dJMPENV; int x = 0; JMPENV_PUSH(x); PERL_UNUSED_VAR(x); if (PL_endav && !PL_minus_c) call_list(PL_scopestack_ix, PL_endav); JMPENV_POP; } LEAVE; FREETMPS; /* Need to flush since END blocks can produce output */ my_fflush_all(); if (CALL_FPTR(PL_threadhook)(aTHX)) { /* Threads hook has vetoed further cleanup */ return STATUS_EXIT; } #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP if (destruct_level != 0) { /* Fork here to create a child. Our child's job is to preserve the state of scalars prior to destruction, so that we can instruct it to dump any scalars that we later find have leaked. There's no subtlety in this code - it assumes POSIX, and it doesn't fail gracefully */ int fd[2]; if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) { perror("Debug leaking scalars socketpair failed"); abort(); } child = fork(); if(child == -1) { perror("Debug leaking scalars fork failed"); abort(); } if (!child) { /* We are the child */ const int sock = fd[1]; const int debug_fd = PerlIO_fileno(Perl_debug_log); int f; const char *where; /* Our success message is an integer 0, and a char 0 */ static const char success[sizeof(int) + 1]; close(fd[0]); /* We need to close all other file descriptors otherwise we end up with interesting hangs, where the parent closes its end of a pipe, and sits waiting for (another) child to terminate. Only that child never terminates, because it never gets EOF, because we also have the far end of the pipe open. We even need to close the debugging fd, because sometimes it happens to be one end of a pipe, and a process is waiting on the other end for EOF. Normally it would be closed at some point earlier in destruction, but if we happen to cause the pipe to remain open, EOF never occurs, and we get an infinite hang. Hence all the games to pass in a file descriptor if it's actually needed. */ f = sysconf(_SC_OPEN_MAX); if(f < 0) { where = "sysconf failed"; goto abort; } while (f--) { if (f == sock) continue; close(f); } while (1) { SV *target; union control_un control; struct msghdr msg; struct iovec vec[1]; struct cmsghdr *cmptr; ssize_t got; int got_fd; msg.msg_control = control.control; msg.msg_controllen = sizeof(control.control); /* We're a connected socket so we don't need a source */ msg.msg_name = NULL; msg.msg_namelen = 0; msg.msg_iov = vec; msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]); vec[0].iov_base = (void*)⌖ vec[0].iov_len = sizeof(target); got = recvmsg(sock, &msg, 0); if(got == 0) break; if(got < 0) { where = "recv failed"; goto abort; } if(got < sizeof(target)) { where = "short recv"; goto abort; } if(!(cmptr = CMSG_FIRSTHDR(&msg))) { where = "no cmsg"; goto abort; } if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) { where = "wrong cmsg_len"; goto abort; } if(cmptr->cmsg_level != SOL_SOCKET) { where = "wrong cmsg_level"; goto abort; } if(cmptr->cmsg_type != SCM_RIGHTS) { where = "wrong cmsg_type"; goto abort; } got_fd = *(int*)CMSG_DATA(cmptr); /* For our last little bit of trickery, put the file descriptor back into Perl_debug_log, as if we never actually closed it */ if(got_fd != debug_fd) { if (dup2(got_fd, debug_fd) == -1) { where = "dup2"; goto abort; } } sv_dump(target); PerlIO_flush(Perl_debug_log); got = write(sock, &success, sizeof(success)); if(got < 0) { where = "write failed"; goto abort; } if(got < sizeof(success)) { where = "short write"; goto abort; } } _exit(0); abort: { int send_errno = errno; unsigned char length = (unsigned char) strlen(where); struct iovec failure[3] = { {(void*)&send_errno, sizeof(send_errno)}, {&length, 1}, {(void*)where, length} }; int got = writev(sock, failure, 3); /* Bad news travels fast. Faster than data. We'll get a SIGPIPE in the parent if we try to read from the socketpair after the child has exited, even if there was data to read. So sleep a bit to give the parent a fighting chance of reading the data. */ sleep(2); _exit((got == -1) ? errno : 0); } /* End of child. */ } PL_dumper_fd = fd[0]; close(fd[1]); } #endif /* We must account for everything. */ /* Destroy the main CV and syntax tree */ /* Do this now, because destroying ops can cause new SVs to be generated in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they PL_curcop to point to a valid op from which the filename structure member is copied. */ PL_curcop = &PL_compiling; if (PL_main_root) { /* ensure comppad/curpad to refer to main's pad */ if (CvPADLIST(PL_main_cv)) { PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1); } op_free(PL_main_root); PL_main_root = Nullop; } PL_main_start = Nullop; SvREFCNT_dec(PL_main_cv); PL_main_cv = Nullcv; PL_dirty = TRUE; /* Tell PerlIO we are about to tear things apart in case we have layers which are using resources that should be cleaned up now. */ PerlIO_destruct(aTHX); if (PL_sv_objcount) { /* * Try to destruct global references. We do this first so that the * destructors and destructees still exist. Some sv's might remain. * Non-referenced objects are on their own. */ sv_clean_objs(); PL_sv_objcount = 0; if (PL_defoutgv && !SvREFCNT(PL_defoutgv)) PL_defoutgv = Nullgv; /* may have been freed */ } /* unhook hooks which will soon be, or use, destroyed data */ SvREFCNT_dec(PL_warnhook); PL_warnhook = Nullsv; SvREFCNT_dec(PL_diehook); PL_diehook = Nullsv; /* call exit list functions */ while (PL_exitlistlen-- > 0) PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr); Safefree(PL_exitlist); PL_exitlist = NULL; PL_exitlistlen = 0; if (destruct_level == 0){ DEBUG_P(debprofdump()); #if defined(PERLIO_LAYERS) /* No more IO - including error messages ! */ PerlIO_cleanup(aTHX); #endif /* The exit() function will do everything that needs doing. */ return STATUS_EXIT; } /* jettison our possibly duplicated environment */ /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied * so we certainly shouldn't free it here */ #ifndef PERL_MICRO #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV) if (environ != PL_origenviron && !PL_use_safe_putenv #ifdef USE_ITHREADS /* only main thread can free environ[0] contents */ && PL_curinterp == aTHX #endif ) { I32 i; for (i = 0; environ[i]; i++) safesysfree(environ[i]); /* Must use safesysfree() when working with environ. */ safesysfree(environ); environ = PL_origenviron; } #endif #endif /* !PERL_MICRO */ /* reset so print() ends up where we expect */ setdefout(Nullgv); #ifdef USE_ITHREADS /* the syntax tree is shared between clones * so op_free(PL_main_root) only ReREFCNT_dec's * REGEXPs in the parent interpreter * we need to manually ReREFCNT_dec for the clones */ { I32 i = AvFILLp(PL_regex_padav) + 1; SV * const * const ary = AvARRAY(PL_regex_padav); while (i) { SV * const resv = ary[--i]; if (SvFLAGS(resv) & SVf_BREAK) { /* this is PL_reg_curpm, already freed * flag is set in regexec.c:S_regtry */ SvFLAGS(resv) &= ~SVf_BREAK; } else if(SvREPADTMP(resv)) { SvREPADTMP_off(resv); } else if(SvIOKp(resv)) { REGEXP *re = INT2PTR(REGEXP *,SvIVX(resv)); ReREFCNT_dec(re); } } } SvREFCNT_dec(PL_regex_padav); PL_regex_padav = NULL; PL_regex_pad = NULL; #endif SvREFCNT_dec((SV*) PL_stashcache); PL_stashcache = NULL; /* loosen bonds of global variables */ if(PL_rsfp) { (void)PerlIO_close(PL_rsfp); PL_rsfp = Nullfp; } /* Filters for program text */ SvREFCNT_dec(PL_rsfp_filters); PL_rsfp_filters = NULL; /* switches */ PL_preprocess = FALSE; PL_minus_n = FALSE; PL_minus_p = FALSE; PL_minus_l = FALSE; PL_minus_a = FALSE; PL_minus_F = FALSE; PL_doswitches = FALSE; PL_dowarn = G_WARN_OFF; PL_doextract = FALSE; PL_sawampersand = FALSE; /* must save all match strings */ PL_unsafe = FALSE; Safefree(PL_inplace); PL_inplace = Nullch; SvREFCNT_dec(PL_patchlevel); if (PL_e_script) { SvREFCNT_dec(PL_e_script); PL_e_script = Nullsv; } PL_perldb = 0; /* magical thingies */ SvREFCNT_dec(PL_ofs_sv); /* $, */ PL_ofs_sv = Nullsv; SvREFCNT_dec(PL_ors_sv); /* $\ */ PL_ors_sv = Nullsv; SvREFCNT_dec(PL_rs); /* $/ */ PL_rs = Nullsv; PL_multiline = 0; /* $* */ Safefree(PL_osname); /* $^O */ PL_osname = Nullch; SvREFCNT_dec(PL_statname); PL_statname = Nullsv; PL_statgv = Nullgv; /* defgv, aka *_ should be taken care of elsewhere */ /* clean up after study() */ SvREFCNT_dec(PL_lastscream); PL_lastscream = Nullsv; Safefree(PL_screamfirst); PL_screamfirst = 0; Safefree(PL_screamnext); PL_screamnext = 0; /* float buffer */ Safefree(PL_efloatbuf); PL_efloatbuf = Nullch; PL_efloatsize = 0; /* startup and shutdown function lists */ SvREFCNT_dec(PL_beginav); SvREFCNT_dec(PL_beginav_save); SvREFCNT_dec(PL_endav); SvREFCNT_dec(PL_checkav); SvREFCNT_dec(PL_checkav_save); SvREFCNT_dec(PL_initav); PL_beginav = NULL; PL_beginav_save = NULL; PL_endav = NULL; PL_checkav = NULL; PL_checkav_save = NULL; PL_initav = NULL; /* shortcuts just get cleared */ PL_envgv = Nullgv; PL_incgv = Nullgv; PL_hintgv = Nullgv; PL_errgv = Nullgv; PL_argvgv = Nullgv; PL_argvoutgv = Nullgv; PL_stdingv = Nullgv; PL_stderrgv = Nullgv; PL_last_in_gv = Nullgv; PL_replgv = Nullgv; PL_DBgv = Nullgv; PL_DBline = Nullgv; PL_DBsub = Nullgv; PL_DBsingle = Nullsv; PL_DBtrace = Nullsv; PL_DBsignal = Nullsv; PL_DBassertion = Nullsv; PL_DBcv = Nullcv; PL_dbargs = NULL; PL_debstash = NULL; SvREFCNT_dec(PL_argvout_stack); PL_argvout_stack = NULL; SvREFCNT_dec(PL_modglobal); PL_modglobal = NULL; SvREFCNT_dec(PL_preambleav); PL_preambleav = NULL; SvREFCNT_dec(PL_subname); PL_subname = Nullsv; SvREFCNT_dec(PL_linestr); PL_linestr = Nullsv; #ifdef PERL_USES_PL_PIDSTATUS SvREFCNT_dec(PL_pidstatus); PL_pidstatus = NULL; #endif SvREFCNT_dec(PL_toptarget); PL_toptarget = Nullsv; SvREFCNT_dec(PL_bodytarget); PL_bodytarget = Nullsv; PL_formtarget = Nullsv; /* free locale stuff */ #ifdef USE_LOCALE_COLLATE Safefree(PL_collation_name); PL_collation_name = Nullch; #endif #ifdef USE_LOCALE_NUMERIC Safefree(PL_numeric_name); PL_numeric_name = Nullch; SvREFCNT_dec(PL_numeric_radix_sv); PL_numeric_radix_sv = Nullsv; #endif /* clear utf8 character classes */ SvREFCNT_dec(PL_utf8_alnum); SvREFCNT_dec(PL_utf8_alnumc); SvREFCNT_dec(PL_utf8_ascii); SvREFCNT_dec(PL_utf8_alpha); SvREFCNT_dec(PL_utf8_space); SvREFCNT_dec(PL_utf8_cntrl); SvREFCNT_dec(PL_utf8_graph); SvREFCNT_dec(PL_utf8_digit); SvREFCNT_dec(PL_utf8_upper); SvREFCNT_dec(PL_utf8_lower); SvREFCNT_dec(PL_utf8_print); SvREFCNT_dec(PL_utf8_punct); SvREFCNT_dec(PL_utf8_xdigit); SvREFCNT_dec(PL_utf8_mark); SvREFCNT_dec(PL_utf8_toupper); SvREFCNT_dec(PL_utf8_totitle); SvREFCNT_dec(PL_utf8_tolower); SvREFCNT_dec(PL_utf8_tofold); SvREFCNT_dec(PL_utf8_idstart); SvREFCNT_dec(PL_utf8_idcont); PL_utf8_alnum = Nullsv; PL_utf8_alnumc = Nullsv; PL_utf8_ascii = Nullsv; PL_utf8_alpha = Nullsv; PL_utf8_space = Nullsv; PL_utf8_cntrl = Nullsv; PL_utf8_graph = Nullsv; PL_utf8_digit = Nullsv; PL_utf8_upper = Nullsv; PL_utf8_lower = Nullsv; PL_utf8_print = Nullsv; PL_utf8_punct = Nullsv; PL_utf8_xdigit = Nullsv; PL_utf8_mark = Nullsv; PL_utf8_toupper = Nullsv; PL_utf8_totitle = Nullsv; PL_utf8_tolower = Nullsv; PL_utf8_tofold = Nullsv; PL_utf8_idstart = Nullsv; PL_utf8_idcont = Nullsv; if (!specialWARN(PL_compiling.cop_warnings)) SvREFCNT_dec(PL_compiling.cop_warnings); PL_compiling.cop_warnings = Nullsv; if (!specialCopIO(PL_compiling.cop_io)) SvREFCNT_dec(PL_compiling.cop_io); PL_compiling.cop_io = Nullsv; CopFILE_free(&PL_compiling); CopSTASH_free(&PL_compiling); /* Prepare to destruct main symbol table. */ hv = PL_defstash; PL_defstash = 0; SvREFCNT_dec(hv); SvREFCNT_dec(PL_curstname); PL_curstname = Nullsv; /* clear queued errors */ SvREFCNT_dec(PL_errors); PL_errors = Nullsv; FREETMPS; if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) { if (PL_scopestack_ix != 0) Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Unbalanced scopes: %ld more ENTERs than LEAVEs\n", (long)PL_scopestack_ix); if (PL_savestack_ix != 0) Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Unbalanced saves: %ld more saves than restores\n", (long)PL_savestack_ix); if (PL_tmps_floor != -1) Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n", (long)PL_tmps_floor + 1); if (cxstack_ix != -1) Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n", (long)cxstack_ix + 1); } /* Now absolutely destruct everything, somehow or other, loops or no. */ SvFLAGS(PL_fdpid) |= SVTYPEMASK; /* don't clean out pid table now */ SvFLAGS(PL_strtab) |= SVTYPEMASK; /* don't clean out strtab now */ /* the 2 is for PL_fdpid and PL_strtab */ while (PL_sv_count > 2 && sv_clean_all()) ; SvFLAGS(PL_fdpid) &= ~SVTYPEMASK; SvFLAGS(PL_fdpid) |= SVt_PVAV; SvFLAGS(PL_strtab) &= ~SVTYPEMASK; SvFLAGS(PL_strtab) |= SVt_PVHV; AvREAL_off(PL_fdpid); /* no surviving entries */ SvREFCNT_dec(PL_fdpid); /* needed in io_close() */ PL_fdpid = NULL; #ifdef HAVE_INTERP_INTERN sys_intern_clear(); #endif /* Destruct the global string table. */ { /* Yell and reset the HeVAL() slots that are still holding refcounts, * so that sv_free() won't fail on them. * Now that the global string table is using a single hunk of memory * for both HE and HEK, we either need to explicitly unshare it the * correct way, or actually free things here. */ I32 riter = 0; const I32 max = HvMAX(PL_strtab); HE * const * const array = HvARRAY(PL_strtab); HE *hent = array[0]; for (;;) { if (hent && ckWARN_d(WARN_INTERNAL)) { HE * const next = HeNEXT(hent); Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Unbalanced string table refcount: (%ld) for \"%s\"", (long)(HeVAL(hent) - Nullsv), HeKEY(hent)); Safefree(hent); hent = next; } if (!hent) { if (++riter > max) break; hent = array[riter]; } } Safefree(array); HvARRAY(PL_strtab) = 0; HvTOTALKEYS(PL_strtab) = 0; HvFILL(PL_strtab) = 0; } SvREFCNT_dec(PL_strtab); #ifdef USE_ITHREADS /* free the pointer tables used for cloning */ ptr_table_free(PL_ptr_table); PL_ptr_table = (PTR_TBL_t*)NULL; #endif /* free special SVs */ SvREFCNT(&PL_sv_yes) = 0; sv_clear(&PL_sv_yes); SvANY(&PL_sv_yes) = NULL; SvFLAGS(&PL_sv_yes) = 0; SvREFCNT(&PL_sv_no) = 0; sv_clear(&PL_sv_no); SvANY(&PL_sv_no) = NULL; SvFLAGS(&PL_sv_no) = 0; { int i; for (i=0; i<=2; i++) { SvREFCNT(PERL_DEBUG_PAD(i)) = 0; sv_clear(PERL_DEBUG_PAD(i)); SvANY(PERL_DEBUG_PAD(i)) = NULL; SvFLAGS(PERL_DEBUG_PAD(i)) = 0; } } if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL)) Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count); #ifdef DEBUG_LEAKING_SCALARS if (PL_sv_count != 0) { SV* sva; SV* sv; register SV* svend; for (sva = PL_sv_arenaroot; sva; sva = (SV*)SvANY(sva)) { svend = &sva[SvREFCNT(sva)]; for (sv = sva + 1; sv < svend; ++sv) { if (SvTYPE(sv) != SVTYPEMASK) { PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p" " flags=0x%"UVxf " refcnt=%"UVuf pTHX__FORMAT "\n" "\tallocated at %s:%d %s %s%s\n", sv, sv->sv_flags, sv->sv_refcnt pTHX__VALUE, sv->sv_debug_file ? sv->sv_debug_file : "(unknown)", sv->sv_debug_line, sv->sv_debug_inpad ? "for" : "by", sv->sv_debug_optype ? PL_op_name[sv->sv_debug_optype]: "(none)", sv->sv_debug_cloned ? " (cloned)" : "" ); #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP Perl_dump_sv_child(aTHX_ sv); #endif } } } } #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP { int status; fd_set rset; /* Wait for up to 4 seconds for child to terminate. This seems to be the least effort way of timing out on reaping its exit status. */ struct timeval waitfor = {4, 0}; int sock = PL_dumper_fd; shutdown(sock, 1); FD_ZERO(&rset); FD_SET(sock, &rset); select(sock + 1, &rset, NULL, NULL, &waitfor); waitpid(child, &status, WNOHANG); close(sock); } #endif #endif PL_sv_count = 0; #if defined(PERLIO_LAYERS) /* No more IO - including error messages ! */ PerlIO_cleanup(aTHX); #endif /* sv_undef needs to stay immortal until after PerlIO_cleanup as currently layers use it rather than Nullsv as a marker for no arg - and will try and SvREFCNT_dec it. */ SvREFCNT(&PL_sv_undef) = 0; SvREADONLY_off(&PL_sv_undef); Safefree(PL_origfilename); PL_origfilename = Nullch; Safefree(PL_reg_start_tmp); PL_reg_start_tmp = (char**)NULL; PL_reg_start_tmpl = 0; Safefree(PL_reg_curpm); Safefree(PL_reg_poscache); free_tied_hv_pool(); Safefree(PL_op_mask); Safefree(PL_psig_ptr); PL_psig_ptr = (SV**)NULL; Safefree(PL_psig_name); PL_psig_name = (SV**)NULL; Safefree(PL_bitcount); PL_bitcount = Nullch; Safefree(PL_psig_pend); PL_psig_pend = (int*)NULL; PL_formfeed = Nullsv; nuke_stacks(); PL_tainting = FALSE; PL_taint_warn = FALSE; PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */ PL_debug = 0; DEBUG_P(debprofdump()); #ifdef USE_REENTRANT_API Perl_reentrant_free(aTHX); #endif sv_free_arenas(); /* As the absolutely last thing, free the non-arena SV for mess() */ if (PL_mess_sv) { /* we know that type == SVt_PVMG */ /* it could have accumulated taint magic */ MAGIC* mg; MAGIC* moremagic; for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) { moremagic = mg->mg_moremagic; if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global && mg->mg_len >= 0) Safefree(mg->mg_ptr); Safefree(mg); } /* we know that type >= SVt_PV */ SvPV_free(PL_mess_sv); Safefree(SvANY(PL_mess_sv)); Safefree(PL_mess_sv); PL_mess_sv = Nullsv; } return STATUS_EXIT; } /* =for apidoc perl_free Releases a Perl interpreter. See L. =cut */ void perl_free(pTHXx) { #if defined(WIN32) || defined(NETWARE) # if defined(PERL_IMPLICIT_SYS) # ifdef NETWARE void *host = nw_internal_host; # else void *host = w32_internal_host; # endif PerlMem_free(aTHXx); # ifdef NETWARE nw_delete_internal_host(host); # else win32_delete_internal_host(host); # endif # else PerlMem_free(aTHXx); # endif #else PerlMem_free(aTHXx); #endif } #if defined(USE_5005THREADS) || defined(USE_ITHREADS) /* provide destructors to clean up the thread key when libperl is unloaded */ #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */ #if defined(__hpux) && __ux_version > 1020 && !defined(__GNUC__) #pragma fini "perl_fini" #endif static void #if defined(__GNUC__) __attribute__((destructor)) #endif perl_fini(void) { dVAR; if (PL_curinterp) FREE_THREAD_KEY; } #endif /* WIN32 */ #endif /* THREADS */ void Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr) { Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry); PL_exitlist[PL_exitlistlen].fn = fn; PL_exitlist[PL_exitlistlen].ptr = ptr; ++PL_exitlistlen; } #ifdef HAS_PROCSELFEXE /* This is a function so that we don't hold on to MAXPATHLEN bytes of stack longer than necessary */ STATIC void S_procself_val(pTHX_ SV *sv, const char *arg0) { char buf[MAXPATHLEN]; int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1); /* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe) includes a spurious NUL which will cause $^X to fail in system or backticks (this will prevent extensions from being built and many tests from working). readlink is not meant to add a NUL. Normal readlink works fine. */ if (len > 0 && buf[len-1] == '\0') { len--; } /* FreeBSD's implementation is acknowledged to be imperfect, sometimes returning the text "unknown" from the readlink rather than the path to the executable (or returning an error from the readlink). Any valid path has a '/' in it somewhere, so use that to validate the result. See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703 */ if (len > 0 && memchr(buf, '/', len)) { sv_setpvn(sv,buf,len); } else { sv_setpv(sv,arg0); } } #endif /* HAS_PROCSELFEXE */ STATIC void S_set_caret_X(pTHX) { GV* tmpgv = gv_fetchpv("\030",TRUE, SVt_PV); /* $^X */ if (tmpgv) { #ifdef HAS_PROCSELFEXE S_procself_val(aTHX_ GvSV(tmpgv), PL_origargv[0]); #else #ifdef OS2 sv_setpv(GvSVn(tmpgv), os2_execname(aTHX)); #else sv_setpv(GvSVn(tmpgv),PL_origargv[0]); #endif #endif } } /* =for apidoc perl_parse Tells a Perl interpreter to parse a Perl script. See L. =cut */ int perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env) { dVAR; I32 oldscope; int ret; dJMPENV; PERL_UNUSED_VAR(my_perl); #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW #ifdef IAMSUID #undef IAMSUID Perl_croak(aTHX_ "suidperl is no longer needed since the kernel can now execute\n\ setuid perl scripts securely.\n"); #endif /* IAMSUID */ #endif #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0 * This MUST be done before any hash stores or fetches take place. * If you set PL_rehash_seed (and assumedly also PL_rehash_seed_set) * yourself, it is your responsibility to provide a good random seed! * You can also define PERL_HASH_SEED in compile time, see hv.h. */ if (!PL_rehash_seed_set) PL_rehash_seed = get_hash_seed(); { const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG"); if (s && (atoi(s) == 1)) PerlIO_printf(Perl_debug_log, "HASH_SEED = %"UVuf"\n", PL_rehash_seed); } #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */ PL_origargc = argc; PL_origargv = argv; { /* Set PL_origalen be the sum of the contiguous argv[] * elements plus the size of the env in case that it is * contiguous with the argv[]. This is used in mg.c:Perl_magic_set() * as the maximum modifiable length of $0. In the worst case * the area we are able to modify is limited to the size of * the original argv[0]. (See below for 'contiguous', though.) * --jhi */ const char *s = NULL; int i; const UV mask = ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0); /* Do the mask check only if the args seem like aligned. */ const UV aligned = (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0])); /* See if all the arguments are contiguous in memory. Note * that 'contiguous' is a loose term because some platforms * align the argv[] and the envp[]. If the arguments look * like non-aligned, assume that they are 'strictly' or * 'traditionally' contiguous. If the arguments look like * aligned, we just check that they are within aligned * PTRSIZE bytes. As long as no system has something bizarre * like the argv[] interleaved with some other data, we are * fine. (Did I just evoke Murphy's Law?) --jhi */ if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) { while (*s) s++; for (i = 1; i < PL_origargc; i++) { if ((PL_origargv[i] == s + 1 #ifdef OS2 || PL_origargv[i] == s + 2 #endif ) || (aligned && (PL_origargv[i] > s && PL_origargv[i] <= INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask))) ) { s = PL_origargv[i]; while (*s) s++; } else break; } } /* Can we grab env area too to be used as the area for $0? */ if (PL_origenviron) { if ((PL_origenviron[0] == s + 1 #ifdef OS2 || (PL_origenviron[0] == s + 9 && (s += 8)) #endif ) || (aligned && (PL_origenviron[0] > s && PL_origenviron[0] <= INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask))) ) { #ifndef OS2 s = PL_origenviron[0]; while (*s) s++; #endif my_setenv("NoNe SuCh", Nullch); /* Force copy of environment. */ for (i = 1; PL_origenviron[i]; i++) { if (PL_origenviron[i] == s + 1 || (aligned && (PL_origenviron[i] > s && PL_origenviron[i] <= INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask))) ) { s = PL_origenviron[i]; while (*s) s++; } else break; } } } PL_origalen = s - PL_origargv[0] + 1; } if (PL_do_undump) { /* Come here if running an undumped a.out. */ PL_origfilename = savepv(argv[0]); PL_do_undump = FALSE; cxstack_ix = -1; /* start label stack again */ init_ids(); assert (!PL_tainted); TAINT; S_set_caret_X(aTHX); TAINT_NOT; init_postdump_symbols(argc,argv,env); return 0; } if (PL_main_root) { op_free(PL_main_root); PL_main_root = Nullop; } PL_main_start = Nullop; SvREFCNT_dec(PL_main_cv); PL_main_cv = Nullcv; time(&PL_basetime); oldscope = PL_scopestack_ix; PL_dowarn = G_WARN_OFF; JMPENV_PUSH(ret); switch (ret) { case 0: parse_body(env,xsinit); if (PL_checkav) call_list(oldscope, PL_checkav); ret = 0; break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ while (PL_scopestack_ix > oldscope) LEAVE; FREETMPS; PL_curstash = PL_defstash; if (PL_checkav) call_list(oldscope, PL_checkav); ret = STATUS_EXIT; break; case 3: PerlIO_printf(Perl_error_log, "panic: top_env\n"); ret = 1; break; } JMPENV_POP; return ret; } STATIC void * S_parse_body(pTHX_ char **env, XSINIT_t xsinit) { dVAR; int argc = PL_origargc; char **argv = PL_origargv; const char *scriptname = NULL; VOL bool dosearch = FALSE; const char *validarg = ""; register SV *sv; register char *s; const char *cddir = Nullch; #ifdef USE_SITECUSTOMIZE bool minus_f = FALSE; #endif PL_fdscript = -1; PL_suidscript = -1; sv_setpvn(PL_linestr,"",0); sv = newSVpvn("",0); /* first used for -I flags */ SAVEFREESV(sv); init_main_stash(); for (argc--,argv++; argc > 0; argc--,argv++) { if (argv[0][0] != '-' || !argv[0][1]) break; #ifdef DOSUID if (*validarg) validarg = " PHOOEY "; else validarg = argv[0]; /* * Can we rely on the kernel to start scripts with argv[1] set to * contain all #! line switches (the whole line)? (argv[0] is set to * the interpreter name, argv[2] to the script name; argv[3] and * above may contain other arguments.) */ #endif s = argv[0]+1; reswitch: switch (*s) { case 'C': #ifndef PERL_STRICT_CR case '\r': #endif case ' ': case '0': case 'F': case 'a': case 'c': case 'd': case 'D': case 'h': case 'i': case 'l': case 'M': case 'm': case 'n': case 'p': case 's': case 'u': case 'U': case 'v': case 'W': case 'X': case 'w': case 'A': if ((s = moreswitches(s))) goto reswitch; break; case 't': CHECK_MALLOC_TOO_LATE_FOR('t'); if( !PL_tainting ) { PL_taint_warn = TRUE; PL_tainting = TRUE; } s++; goto reswitch; case 'T': CHECK_MALLOC_TOO_LATE_FOR('T'); PL_tainting = TRUE; PL_taint_warn = FALSE; s++; goto reswitch; case 'E': PL_minus_E = TRUE; /* FALL THROUGH */ case 'e': #ifdef MACOS_TRADITIONAL /* ignore -e for Dev:Pseudo argument */ if (argv[1] && !strcmp(argv[1], "Dev:Pseudo")) break; #endif forbid_setid("-e"); if (!PL_e_script) { PL_e_script = newSVpvn("",0); filter_add(read_e_script, NULL); } if (*++s) sv_catpv(PL_e_script, s); else if (argv[1]) { sv_catpv(PL_e_script, argv[1]); argc--,argv++; } else Perl_croak(aTHX_ "No code specified for -%c", *s); sv_catpv(PL_e_script, "\n"); break; case 'f': #ifdef USE_SITECUSTOMIZE minus_f = TRUE; #endif s++; goto reswitch; case 'I': /* -I handled both here and in moreswitches() */ forbid_setid("-I"); if (!*++s && (s=argv[1]) != Nullch) { argc--,argv++; } if (s && *s) { STRLEN len = strlen(s); const char * const p = savepvn(s, len); incpush(p, TRUE, TRUE, FALSE, FALSE); sv_catpvn(sv, "-I", 2); sv_catpvn(sv, p, len); sv_catpvn(sv, " ", 1); Safefree(p); } else Perl_croak(aTHX_ "No directory specified for -I"); break; case 'P': forbid_setid("-P"); PL_preprocess = TRUE; s++; goto reswitch; case 'S': forbid_setid("-S"); dosearch = TRUE; s++; goto reswitch; case 'V': { SV *opts_prog; if (!PL_preambleav) PL_preambleav = newAV(); av_push(PL_preambleav, newSVpv("use Config;",0)); if (*++s != ':') { STRLEN opts; opts_prog = newSVpv("print Config::myconfig(),",0); #ifdef VMS sv_catpv(opts_prog,"\"\\nCharacteristics of this PERLSHR image: \\n\","); #else sv_catpv(opts_prog,"\"\\nCharacteristics of this binary (from libperl): \\n\","); #endif opts = SvCUR(opts_prog); Perl_sv_catpv(aTHX_ opts_prog,"\" Compile-time options:" # ifdef DEBUGGING " DEBUGGING" # endif # ifdef DEBUG_LEAKING_SCALARS " DEBUG_LEAKING_SCALARS" # endif # ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP " DEBUG_LEAKING_SCALARS_FORK_DUMP" # endif # ifdef FAKE_THREADS " FAKE_THREADS" # endif # ifdef MULTIPLICITY " MULTIPLICITY" # endif # ifdef MYMALLOC " MYMALLOC" # endif # ifdef NO_MATHOMS " NO_MATHOMS" # endif # ifdef PERL_DONT_CREATE_GVSV " PERL_DONT_CREATE_GVSV" # endif # ifdef PERL_GLOBAL_STRUCT " PERL_GLOBAL_STRUCT" # endif # ifdef PERL_IMPLICIT_CONTEXT " PERL_IMPLICIT_CONTEXT" # endif # ifdef PERL_IMPLICIT_SYS " PERL_IMPLICIT_SYS" # endif # ifdef PERL_MALLOC_WRAP " PERL_MALLOC_WRAP" # endif # ifdef PERL_NEED_APPCTX " PERL_NEED_APPCTX" # endif # ifdef PERL_NEED_TIMESBASE " PERL_NEED_TIMESBASE" # endif # ifdef PERL_OLD_COPY_ON_WRITE " PERL_OLD_COPY_ON_WRITE" # endif # ifdef PERL_TRACK_MEMPOOL " PERL_TRACK_MEMPOOL" # endif # ifdef PERL_USE_SAFE_PUTENV " PERL_USE_SAFE_PUTENV" # endif #ifdef PERL_USES_PL_PIDSTATUS " PERL_USES_PL_PIDSTATUS" #endif # ifdef PL_OP_SLAB_ALLOC " PL_OP_SLAB_ALLOC" # endif # ifdef SPRINTF_RETURNS_STRLEN " SPRINTF_RETURNS_STRLEN" # endif # ifdef THREADS_HAVE_PIDS " THREADS_HAVE_PIDS" # endif # ifdef USE_5005THREADS " USE_5005THREADS" # endif # ifdef USE_64_BIT_ALL " USE_64_BIT_ALL" # endif # ifdef USE_64_BIT_INT " USE_64_BIT_INT" # endif # ifdef USE_ITHREADS " USE_ITHREADS" # endif # ifdef USE_LARGE_FILES " USE_LARGE_FILES" # endif # ifdef USE_LONG_DOUBLE " USE_LONG_DOUBLE" # endif # ifdef USE_PERLIO " USE_PERLIO" # endif # ifdef USE_REENTRANT_API " USE_REENTRANT_API" # endif # ifdef USE_SFIO " USE_SFIO" # endif # ifdef USE_SITECUSTOMIZE " USE_SITECUSTOMIZE" # endif # ifdef USE_SOCKS " USE_SOCKS" # endif ); while (SvCUR(opts_prog) > opts+76) { /* find last space after "options: " and before col 76 */ const char *space; char * const pv = SvPV_nolen(opts_prog); const char c = pv[opts+76]; pv[opts+76] = '\0'; space = strrchr(pv+opts+26, ' '); pv[opts+76] = c; if (!space) break; /* "Can't happen" */ /* break the line before that space */ opts = space - pv; sv_insert(opts_prog, opts, 0, "\\n ", 25); } sv_catpv(opts_prog,"\\n\","); #if defined(LOCAL_PATCH_COUNT) if (LOCAL_PATCH_COUNT > 0) { int i; sv_catpv(opts_prog, "\" Locally applied patches:\\n\","); for (i = 1; i <= LOCAL_PATCH_COUNT; i++) { if (PL_localpatches[i]) Perl_sv_catpvf(aTHX_ opts_prog,"q%c\t%s\n%c,", 0, PL_localpatches[i], 0); } } #endif Perl_sv_catpvf(aTHX_ opts_prog, "\" Built under %s\\n\"",OSNAME); #ifdef __DATE__ # ifdef __TIME__ Perl_sv_catpvf(aTHX_ opts_prog, ",\" Compiled at %s %s\\n\"",__DATE__, __TIME__); # else Perl_sv_catpvf(aTHX_ opts_prog,",\" Compiled on %s\\n\"", __DATE__); # endif #endif sv_catpv(opts_prog, "; $\"=\"\\n \"; " "@env = map { \"$_=\\\"$ENV{$_}\\\"\" } " "sort grep {/^PERL/} keys %ENV; "); #ifdef __CYGWIN__ sv_catpv(opts_prog, "push @env, \"CYGWIN=\\\"$ENV{CYGWIN}\\\"\";"); #endif sv_catpv(opts_prog, "print \" \\%ENV:\\n @env\\n\" if @env;" "print \" \\@INC:\\n @INC\\n\";"); } else { ++s; opts_prog = Perl_newSVpvf(aTHX_ "Config::config_vars(qw%c%s%c)", 0, s, 0); s += strlen(s); } av_push(PL_preambleav, opts_prog); /* don't look for script or read stdin */ scriptname = BIT_BUCKET; goto reswitch; } case 'x': PL_doextract = TRUE; s++; if (*s) cddir = s; break; case 0: break; case '-': if (!*++s || isSPACE(*s)) { argc--,argv++; goto switch_end; } /* catch use of gnu style long options */ if (strEQ(s, "version")) { s = (char *)"v"; goto reswitch; } if (strEQ(s, "help")) { s = (char *)"h"; goto reswitch; } s--; /* FALL THROUGH */ default: Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s); } } switch_end: if ( #ifndef SECURE_INTERNAL_GETENV !PL_tainting && #endif (s = PerlEnv_getenv("PERL5OPT"))) { const char *popt = s; while (isSPACE(*s)) s++; if (*s == '-' && *(s+1) == 'T') { CHECK_MALLOC_TOO_LATE_FOR('T'); PL_tainting = TRUE; PL_taint_warn = FALSE; } else { char *popt_copy = Nullch; while (s && *s) { char *d; while (isSPACE(*s)) s++; if (*s == '-') { s++; if (isSPACE(*s)) continue; } d = s; if (!*s) break; if (!strchr("CDIMUdmtwA", *s)) Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s); while (++s && *s) { if (isSPACE(*s)) { if (!popt_copy) { popt_copy = SvPVX(sv_2mortal(newSVpv(popt,0))); s = popt_copy + (s - popt); d = popt_copy + (d - popt); } *s++ = '\0'; break; } } if (*d == 't') { if( !PL_tainting ) { PL_taint_warn = TRUE; PL_tainting = TRUE; } } else { moreswitches(d); } } } } #ifdef USE_SITECUSTOMIZE if (!minus_f) { if (!PL_preambleav) PL_preambleav = newAV(); av_unshift(PL_preambleav, 1); (void)av_store(PL_preambleav, 0, Perl_newSVpvf(aTHX_ "BEGIN { do '%s/sitecustomize.pl' }", SITELIB_EXP)); } #endif if (PL_taint_warn && PL_dowarn != G_WARN_ALL_OFF) { PL_compiling.cop_warnings = newSVpvn(WARN_TAINTstring, WARNsize); } if (!scriptname) scriptname = argv[0]; if (PL_e_script) { argc++,argv--; scriptname = BIT_BUCKET; /* don't look for script or read stdin */ } else if (scriptname == Nullch) { #ifdef MSDOS if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) ) moreswitches("h"); #endif scriptname = "-"; } /* Set $^X early so that it can be used for relocatable paths in @INC */ assert (!PL_tainted); TAINT; S_set_caret_X(aTHX); TAINT_NOT; init_perllib(); open_script(scriptname,dosearch,sv); validate_suid(validarg, scriptname); #ifndef PERL_MICRO #if defined(SIGCHLD) || defined(SIGCLD) { #ifndef SIGCHLD # define SIGCHLD SIGCLD #endif Sighandler_t sigstate = rsignal_state(SIGCHLD); if (sigstate == (Sighandler_t) SIG_IGN) { if (ckWARN(WARN_SIGNAL)) Perl_warner(aTHX_ packWARN(WARN_SIGNAL), "Can't ignore signal CHLD, forcing to default"); (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL); } } #endif #endif #ifdef MACOS_TRADITIONAL if (PL_doextract || gMacPerl_AlwaysExtract) { #else if (PL_doextract) { #endif find_beginning(); if (cddir && PerlDir_chdir( (char *)cddir ) < 0) Perl_croak(aTHX_ "Can't chdir to %s",cddir); } PL_main_cv = PL_compcv = (CV*)NEWSV(1104,0); sv_upgrade((SV *)PL_compcv, SVt_PVCV); CvUNIQUE_on(PL_compcv); CvPADLIST(PL_compcv) = pad_new(0); #ifdef USE_5005THREADS CvOWNER(PL_compcv) = 0; Newx(CvMUTEXP(PL_compcv), 1, perl_mutex); MUTEX_INIT(CvMUTEXP(PL_compcv)); #endif /* USE_5005THREADS */ boot_core_PerlIO(); boot_core_UNIVERSAL(); boot_core_xsutils(); if (xsinit) (*xsinit)(aTHX); /* in case linked C routines want magical variables */ #ifndef PERL_MICRO #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(EPOC) || defined(SYMBIAN) init_os_extras(); #endif #endif #ifdef USE_SOCKS # ifdef HAS_SOCKS5_INIT socks5_init(argv[0]); # else SOCKSinit(argv[0]); # endif #endif init_predump_symbols(); /* init_postdump_symbols not currently designed to be called */ /* more than once (ENV isn't cleared first, for example) */ /* But running with -u leaves %ENV & @ARGV undefined! XXX */ if (!PL_do_undump) init_postdump_symbols(argc,argv,env); /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE}, * or explicitly in some platforms. * locale.c:Perl_init_i18nl10n() if the environment * look like the user wants to use UTF-8. */ #if defined(__SYMBIAN32__) PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */ #endif if (PL_unicode) { /* Requires init_predump_symbols(). */ if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) { IO* io; PerlIO* fp; SV* sv; /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR * and the default open disciplines. */ if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) && PL_stdingv && (io = GvIO(PL_stdingv)) && (fp = IoIFP(io))) PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8"); if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) && PL_defoutgv && (io = GvIO(PL_defoutgv)) && (fp = IoOFP(io))) PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8"); if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) && PL_stderrgv && (io = GvIO(PL_stderrgv)) && (fp = IoOFP(io))) PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8"); if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) && (sv = GvSV(gv_fetchpv("\017PEN", TRUE, SVt_PV)))) { U32 in = PL_unicode & PERL_UNICODE_IN_FLAG; U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG; if (in) { if (out) sv_setpvn(sv, ":utf8\0:utf8", 11); else sv_setpvn(sv, ":utf8\0", 6); } else if (out) sv_setpvn(sv, "\0:utf8", 6); SvSETMAGIC(sv); } } } if ((s = PerlEnv_getenv("PERL_SIGNALS"))) { if (strEQ(s, "unsafe")) PL_signals |= PERL_SIGNALS_UNSAFE_FLAG; else if (strEQ(s, "safe")) PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG; else Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s); } init_lexer(); /* now parse the script */ SETERRNO(0,SS_NORMAL); PL_error_count = 0; #ifdef MACOS_TRADITIONAL if (gMacPerl_SyntaxError = (yyparse() || PL_error_count)) { if (PL_minus_c) Perl_croak(aTHX_ "%s had compilation errors.\n", MacPerl_MPWFileName(PL_origfilename)); else { Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n", MacPerl_MPWFileName(PL_origfilename)); } } #else if (yyparse() || PL_error_count) { if (PL_minus_c) Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename); else { Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n", PL_origfilename); } } #endif CopLINE_set(PL_curcop, 0); PL_curstash = PL_defstash; PL_preprocess = FALSE; if (PL_e_script) { SvREFCNT_dec(PL_e_script); PL_e_script = Nullsv; } if (PL_do_undump) my_unexec(); if (isWARN_ONCE) { SAVECOPFILE(PL_curcop); SAVECOPLINE(PL_curcop); gv_check(PL_defstash); } LEAVE; FREETMPS; #ifdef MYMALLOC if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2) dump_mstats("after compilation:"); #endif ENTER; PL_restartop = 0; return NULL; } /* =for apidoc perl_run Tells a Perl interpreter to run. See L. =cut */ int perl_run(pTHXx) { I32 oldscope; int ret = 0; dJMPENV; PERL_UNUSED_ARG(my_perl); oldscope = PL_scopestack_ix; #ifdef VMS VMSISH_HUSHED = 0; #endif JMPENV_PUSH(ret); switch (ret) { case 1: cxstack_ix = -1; /* start context stack again */ goto redo_body; case 0: /* normal completion */ redo_body: run_body(oldscope); /* FALL THROUGH */ case 2: /* my_exit() */ while (PL_scopestack_ix > oldscope) LEAVE; FREETMPS; PL_curstash = PL_defstash; if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) && PL_endav && !PL_minus_c) call_list(oldscope, PL_endav); #ifdef MYMALLOC if (PerlEnv_getenv("PERL_DEBUG_MSTATS")) dump_mstats("after execution: "); #endif ret = STATUS_EXIT; break; case 3: if (PL_restartop) { POPSTACK_TO(PL_mainstack); goto redo_body; } PerlIO_printf(Perl_error_log, "panic: restartop\n"); FREETMPS; ret = 1; break; } JMPENV_POP; return ret; } STATIC void S_run_body(pTHX_ I32 oldscope) { DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support.\n", PL_sawampersand ? "Enabling" : "Omitting")); if (!PL_restartop) { DEBUG_x(dump_all()); #ifdef DEBUGGING if (!DEBUG_q_TEST) PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n")); #endif DEBUG_S(PerlIO_printf(Perl_debug_log, "main thread is 0x%"UVxf"\n", PTR2UV(thr))); if (PL_minus_c) { #ifdef MACOS_TRADITIONAL PerlIO_printf(Perl_error_log, "%s%s syntax OK\n", (gMacPerl_ErrorFormat ? "# " : ""), MacPerl_MPWFileName(PL_origfilename)); #else PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename); #endif my_exit(0); } if (PERLDB_SINGLE && PL_DBsingle) sv_setiv(PL_DBsingle, 1); if (PL_initav) call_list(oldscope, PL_initav); } /* do it */ if (PL_restartop) { PL_op = PL_restartop; PL_restartop = 0; CALLRUNOPS(aTHX); } else if (PL_main_start) { CvDEPTH(PL_main_cv) = 1; PL_op = PL_main_start; CALLRUNOPS(aTHX); } my_exit(0); /* NOTREACHED */ } /* =head1 SV Manipulation Functions =for apidoc p||get_sv Returns the SV of the specified Perl scalar. If C is set and the Perl variable does not exist then it will be created. If C is not set and the variable does not exist then NULL is returned. =cut */ SV* Perl_get_sv(pTHX_ const char *name, I32 create) { GV *gv; #ifdef USE_5005THREADS if (name[1] == '\0' && !isALPHA(name[0])) { PADOFFSET tmp = find_threadsv(name); if (tmp != NOT_IN_PAD) return THREADSV(tmp); } #endif /* USE_5005THREADS */ gv = gv_fetchpv(name, create, SVt_PV); if (gv) return GvSV(gv); return Nullsv; } /* =head1 Array Manipulation Functions =for apidoc p||get_av Returns the AV of the specified Perl array. If C is set and the Perl variable does not exist then it will be created. If C is not set and the variable does not exist then NULL is returned. =cut */ AV* Perl_get_av(pTHX_ const char *name, I32 create) { GV* const gv = gv_fetchpv(name, create, SVt_PVAV); if (create) return GvAVn(gv); if (gv) return GvAV(gv); return NULL; } /* =head1 Hash Manipulation Functions =for apidoc p||get_hv Returns the HV of the specified Perl hash. If C is set and the Perl variable does not exist then it will be created. If C is not set and the variable does not exist then NULL is returned. =cut */ HV* Perl_get_hv(pTHX_ const char *name, I32 create) { GV* const gv = gv_fetchpv(name, create, SVt_PVHV); if (create) return GvHVn(gv); if (gv) return GvHV(gv); return NULL; } /* =head1 CV Manipulation Functions =for apidoc p||get_cv Returns the CV of the specified Perl subroutine. If C is set and the Perl subroutine does not exist then it will be declared (which has the same effect as saying C). If C is not set and the subroutine does not exist then NULL is returned. =cut */ CV* Perl_get_cv(pTHX_ const char *name, I32 create) { GV* const gv = gv_fetchpv(name, create, SVt_PVCV); /* XXX unsafe for threads if eval_owner isn't held */ /* XXX this is probably not what they think they're getting. * It has the same effect as "sub name;", i.e. just a forward * declaration! */ if (create && !GvCVu(gv)) return newSUB(start_subparse(FALSE, 0), newSVOP(OP_CONST, 0, newSVpv(name,0)), Nullop, Nullop); if (gv) return GvCVu(gv); return Nullcv; } /* Be sure to refetch the stack pointer after calling these routines. */ /* =head1 Callback Functions =for apidoc p||call_argv Performs a callback to the specified Perl sub. See L. =cut */ I32 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, register char **argv) /* See G_* flags in cop.h */ /* null terminated arg list */ { dSP; PUSHMARK(SP); if (argv) { while (*argv) { XPUSHs(sv_2mortal(newSVpv(*argv,0))); argv++; } PUTBACK; } return call_pv(sub_name, flags); } /* =for apidoc p||call_pv Performs a callback to the specified Perl sub. See L. =cut */ I32 Perl_call_pv(pTHX_ const char *sub_name, I32 flags) /* name of the subroutine */ /* See G_* flags in cop.h */ { return call_sv((SV*)get_cv(sub_name, TRUE), flags); } /* =for apidoc p||call_method Performs a callback to the specified Perl method. The blessed object must be on the stack. See L. =cut */ I32 Perl_call_method(pTHX_ const char *methname, I32 flags) /* name of the subroutine */ /* See G_* flags in cop.h */ { return call_sv(sv_2mortal(newSVpv(methname,0)), flags | G_METHOD); } /* May be called with any of a CV, a GV, or an SV containing the name. */ /* =for apidoc p||call_sv Performs a callback to the Perl sub whose name is in the SV. See L. =cut */ I32 Perl_call_sv(pTHX_ SV *sv, I32 flags) /* See G_* flags in cop.h */ { dVAR; dSP; LOGOP myop; /* fake syntax tree node */ UNOP method_op; I32 oldmark; volatile I32 retval = 0; I32 oldscope; bool oldcatch = CATCH_GET; int ret; OP* const oldop = PL_op; dJMPENV; if (flags & G_DISCARD) { ENTER; SAVETMPS; } Zero(&myop, 1, LOGOP); myop.op_next = Nullop; if (!(flags & G_NOARGS)) myop.op_flags |= OPf_STACKED; myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID : (flags & G_ARRAY) ? OPf_WANT_LIST : OPf_WANT_SCALAR); SAVEOP(); PL_op = (OP*)&myop; EXTEND(PL_stack_sp, 1); *++PL_stack_sp = sv; oldmark = TOPMARK; oldscope = PL_scopestack_ix; if (PERLDB_SUB && PL_curstash != PL_debstash /* Handle first BEGIN of -d. */ && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub))) /* Try harder, since this may have been a sighandler, thus * curstash may be meaningless. */ && (SvTYPE(sv) != SVt_PVCV || CvSTASH((CV*)sv) != PL_debstash) && !(flags & G_NODEBUG)) PL_op->op_private |= OPpENTERSUB_DB; if (flags & G_METHOD) { Zero(&method_op, 1, UNOP); method_op.op_next = PL_op; method_op.op_ppaddr = PL_ppaddr[OP_METHOD]; myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB]; PL_op = (OP*)&method_op; } if (!(flags & G_EVAL)) { CATCH_SET(TRUE); call_body((OP*)&myop, FALSE); retval = PL_stack_sp - (PL_stack_base + oldmark); CATCH_SET(oldcatch); } else { myop.op_other = (OP*)&myop; PL_markstack_ptr--; /* we're trying to emulate pp_entertry() here */ { register PERL_CONTEXT *cx; const I32 gimme = GIMME_V; ENTER; SAVETMPS; PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp); PUSHEVAL(cx, 0, 0); PL_eval_root = PL_op; /* Only needed so that goto works right. */ PL_in_eval = EVAL_INEVAL; if (flags & G_KEEPERR) PL_in_eval |= EVAL_KEEPERR; else sv_setpvn(ERRSV,"",0); } PL_markstack_ptr++; JMPENV_PUSH(ret); switch (ret) { case 0: redo_body: call_body((OP*)&myop, FALSE); retval = PL_stack_sp - (PL_stack_base + oldmark); if (!(flags & G_KEEPERR)) sv_setpvn(ERRSV,"",0); break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ PL_curstash = PL_defstash; FREETMPS; JMPENV_POP; if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) Perl_croak(aTHX_ "Callback called exit"); my_exit_jump(); /* NOTREACHED */ case 3: if (PL_restartop) { PL_op = PL_restartop; PL_restartop = 0; goto redo_body; } PL_stack_sp = PL_stack_base + oldmark; if (flags & G_ARRAY) retval = 0; else { retval = 1; *++PL_stack_sp = &PL_sv_undef; } break; } if (PL_scopestack_ix > oldscope) { SV **newsp; PMOP *newpm; I32 gimme; register PERL_CONTEXT *cx; I32 optype; POPBLOCK(cx,newpm); POPEVAL(cx); PL_curpm = newpm; LEAVE; PERL_UNUSED_VAR(newsp); PERL_UNUSED_VAR(gimme); PERL_UNUSED_VAR(optype); } JMPENV_POP; } if (flags & G_DISCARD) { PL_stack_sp = PL_stack_base + oldmark; retval = 0; FREETMPS; LEAVE; } PL_op = oldop; return retval; } STATIC void S_call_body(pTHX_ const OP *myop, bool is_eval) { if (PL_op == myop) { if (is_eval) PL_op = Perl_pp_entereval(aTHX); /* this doesn't do a POPMARK */ else PL_op = Perl_pp_entersub(aTHX); /* this does */ } if (PL_op) CALLRUNOPS(aTHX); } /* Eval a string. The G_EVAL flag is always assumed. */ /* =for apidoc p||eval_sv Tells Perl to C the string in the SV. =cut */ I32 Perl_eval_sv(pTHX_ SV *sv, I32 flags) /* See G_* flags in cop.h */ { dSP; UNOP myop; /* fake syntax tree node */ volatile I32 oldmark = SP - PL_stack_base; volatile I32 retval = 0; int ret; OP* const oldop = PL_op; dJMPENV; if (flags & G_DISCARD) { ENTER; SAVETMPS; } SAVEOP(); PL_op = (OP*)&myop; Zero(PL_op, 1, UNOP); EXTEND(PL_stack_sp, 1); *++PL_stack_sp = sv; if (!(flags & G_NOARGS)) myop.op_flags = OPf_STACKED; myop.op_next = Nullop; myop.op_type = OP_ENTEREVAL; myop.op_flags |= ((flags & G_VOID) ? OPf_WANT_VOID : (flags & G_ARRAY) ? OPf_WANT_LIST : OPf_WANT_SCALAR); if (flags & G_KEEPERR) myop.op_flags |= OPf_SPECIAL; /* fail now; otherwise we could fail after the JMPENV_PUSH but * before a PUSHEVAL, which corrupts the stack after a croak */ TAINT_PROPER("eval_sv()"); JMPENV_PUSH(ret); switch (ret) { case 0: redo_body: call_body((OP*)&myop,TRUE); retval = PL_stack_sp - (PL_stack_base + oldmark); if (!(flags & G_KEEPERR)) sv_setpvn(ERRSV,"",0); break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ PL_curstash = PL_defstash; FREETMPS; JMPENV_POP; if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) Perl_croak(aTHX_ "Callback called exit"); my_exit_jump(); /* NOTREACHED */ case 3: if (PL_restartop) { PL_op = PL_restartop; PL_restartop = 0; goto redo_body; } PL_stack_sp = PL_stack_base + oldmark; if (flags & G_ARRAY) retval = 0; else { retval = 1; *++PL_stack_sp = &PL_sv_undef; } break; } JMPENV_POP; if (flags & G_DISCARD) { PL_stack_sp = PL_stack_base + oldmark; retval = 0; FREETMPS; LEAVE; } PL_op = oldop; return retval; } /* =for apidoc p||eval_pv Tells Perl to C the given string and return an SV* result. =cut */ SV* Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error) { dSP; SV* sv = newSVpv(p, 0); eval_sv(sv, G_SCALAR); SvREFCNT_dec(sv); SPAGAIN; sv = POPs; PUTBACK; if (croak_on_error && SvTRUE(ERRSV)) { Perl_croak(aTHX_ SvPVx_nolen_const(ERRSV)); } return sv; } /* Require a module. */ /* =head1 Embedding Functions =for apidoc p||require_pv Tells Perl to C the file named by the string argument. It is analogous to the Perl code C. It's even implemented that way; consider using load_module instead. =cut */ void Perl_require_pv(pTHX_ const char *pv) { SV* sv; dSP; PUSHSTACKi(PERLSI_REQUIRE); PUTBACK; sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0); eval_sv(sv_2mortal(sv), G_DISCARD); SPAGAIN; POPSTACK; } void Perl_magicname(pTHX_ const char *sym, const char *name, I32 namlen) { register GV * const gv = gv_fetchpv(sym,TRUE, SVt_PV); if (gv) sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, namlen); } STATIC void S_usage(pTHX_ const char *name) /* XXX move this out into a module ? */ { /* This message really ought to be max 23 lines. * Removed -h because the user already knows that option. Others? */ static const char * const usage_msg[] = { "-0[octal] specify record separator (\\0, if no argument)", "-A[mod][=pattern] activate all/given assertions", "-a autosplit mode with -n or -p (splits $_ into @F)", "-C[number/list] enables the listed Unicode features", "-c check syntax only (runs BEGIN and CHECK blocks)", "-d[:debugger] run program under debugger", "-D[number/list] set debugging flags (argument is a bit mask or alphabets)", "-e program one line of program (several -e's allowed, omit programfile)", "-E program like -e, but enables all optional features", "-f don't do $sitelib/sitecustomize.pl at startup", "-F/pattern/ split() pattern for -a switch (//'s are optional)", "-i[extension] edit <> files in place (makes backup if extension supplied)", "-Idirectory specify @INC/#include directory (several -I's allowed)", "-l[octal] enable line ending processing, specifies line terminator", "-[mM][-]module execute \"use/no module...\" before executing program", "-n assume \"while (<>) { ... }\" loop around program", "-p assume loop like -n but print line also, like sed", "-P run program through C preprocessor before compilation", "-s enable rudimentary parsing for switches after programfile", "-S look for programfile using PATH environment variable", "-t enable tainting warnings", "-T enable tainting checks", "-u dump core after parsing program", "-U allow unsafe operations", "-v print version, subversion (includes VERY IMPORTANT perl info)", "-V[:variable] print configuration summary (or a single Config.pm variable)", "-w enable many useful warnings (RECOMMENDED)", "-W enable all warnings", "-x[directory] strip off text before #!perl line and perhaps cd to directory", "-X disable all warnings", "\n", NULL }; const char * const *p = usage_msg; PerlIO_printf(PerlIO_stdout(), "\nUsage: %s [switches] [--] [programfile] [arguments]", name); while (*p) PerlIO_printf(PerlIO_stdout(), "\n %s", *p++); } /* convert a string of -D options (or digits) into an int. * sets *s to point to the char after the options */ #ifdef DEBUGGING int Perl_get_debug_opts(pTHX_ const char **s, bool givehelp) { static const char * const usage_msgd[] = { " Debugging flag values: (see also -d)", " p Tokenizing and parsing (with v, displays parse stack)", " s Stack snapshots (with v, displays all stacks)", " l Context (loop) stack processing", " t Trace execution", " o Method and overloading resolution", " c String/numeric conversions", " P Print profiling info, preprocessor command for -P, source file input state", " m Memory allocation", " f Format processing", " r Regular expression parsing and execution", " x Syntax tree dump", " u Tainting checks", " H Hash dump -- usurps values()", " X Scratchpad allocation", " D Cleaning up", " S Thread synchronization", " T Tokenising", " R Include reference counts of dumped variables (eg when using -Ds)", " J Do not s,t,P-debug (Jump over) opcodes within package DB", " v Verbose: use in conjunction with other flags", " C Copy On Write", " A Consistency checks on internal structures", " q quiet - currently only suppresses the 'EXECUTING' message", NULL }; int i = 0; if (isALPHA(**s)) { /* if adding extra options, remember to update DEBUG_MASK */ static const char debopts[] = "psltocPmfrxu HXDSTRJvCAq"; for (; isALNUM(**s); (*s)++) { const char * const d = strchr(debopts,**s); if (d) i |= 1 << (d - debopts); else if (ckWARN_d(WARN_DEBUGGING)) Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "invalid option -D%c, use -D'' to see choices\n", **s); } } else if (isDIGIT(**s)) { i = atoi(*s); for (; isALNUM(**s); (*s)++) ; } else if (givehelp) { const char *const *p = usage_msgd; while (*p) PerlIO_printf(PerlIO_stdout(), "%s\n", *p++); } # ifdef EBCDIC if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING)) Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "-Dp not implemented on this platform\n"); # endif return i; } #endif /* This routine handles any switches that can be given during run */ char * Perl_moreswitches(pTHX_ char *s) { dVAR; UV rschar; switch (*s) { case '0': { I32 flags = 0; STRLEN numlen; SvREFCNT_dec(PL_rs); if (s[1] == 'x' && s[2]) { const char *e = s+=2; U8 *tmps; while (*e) e++; numlen = e - s; flags = PERL_SCAN_SILENT_ILLDIGIT; rschar = (U32)grok_hex(s, &numlen, &flags, NULL); if (s + numlen < e) { rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */ numlen = 0; s--; } PL_rs = newSVpvn("", 0); SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1)); tmps = (U8*)SvPVX(PL_rs); uvchr_to_utf8(tmps, rschar); SvCUR_set(PL_rs, UNISKIP(rschar)); SvUTF8_on(PL_rs); } else { numlen = 4; rschar = (U32)grok_oct(s, &numlen, &flags, NULL); if (rschar & ~((U8)~0)) PL_rs = &PL_sv_undef; else if (!rschar && numlen >= 2) PL_rs = newSVpvn("", 0); else { char ch = (char)rschar; PL_rs = newSVpvn(&ch, 1); } } sv_setsv(get_sv("/", TRUE), PL_rs); return s + numlen; } case 'C': s++; PL_unicode = parse_unicode_opts( (const char **)&s ); return s; case 'F': PL_minus_F = TRUE; PL_splitstr = ++s; while (*s && !isSPACE(*s)) ++s; *s = '\0'; PL_splitstr = savepv(PL_splitstr); return s; case 'a': PL_minus_a = TRUE; s++; return s; case 'c': PL_minus_c = TRUE; s++; return s; case 'd': forbid_setid("-d"); s++; /* -dt indicates to the debugger that threads will be used */ if (*s == 't' && !isALNUM(s[1])) { ++s; my_setenv("PERL5DB_THREADED", "1"); } /* The following permits -d:Mod to accepts arguments following an = in the fashion that -MSome::Mod does. */ if (*s == ':' || *s == '=') { const char *start; SV * const sv = newSVpv("use Devel::", 0); start = ++s; /* We now allow -d:Module=Foo,Bar */ while(isALNUM(*s) || *s==':') ++s; if (*s != '=') sv_catpv(sv, start); else { sv_catpvn(sv, start, s-start); Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0); } s += strlen(s); my_setenv("PERL5DB", SvPV_nolen_const(sv)); } if (!PL_perldb) { PL_perldb = PERLDB_ALL; init_debugger(); } return s; case 'D': { #ifdef DEBUGGING forbid_setid("-D"); s++; PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG; #else /* !DEBUGGING */ if (ckWARN_d(WARN_DEBUGGING)) Perl_warner(aTHX_ packWARN(WARN_DEBUGGING), "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n"); for (s++; isALNUM(*s); s++) ; #endif return s; } case 'h': usage(PL_origargv[0]); my_exit(0); case 'i': Safefree(PL_inplace); #if defined(__CYGWIN__) /* do backup extension automagically */ if (*(s+1) == '\0') { PL_inplace = savepv(".bak"); return s+1; } #endif /* __CYGWIN__ */ PL_inplace = savepv(s+1); for (s = PL_inplace; *s && !isSPACE(*s); s++) ; if (*s) { *s++ = '\0'; if (*s == '-') /* Additional switches on #! line. */ s++; } return s; case 'I': /* -I handled both here and in parse_body() */ forbid_setid("-I"); ++s; while (*s && isSPACE(*s)) ++s; if (*s) { char *e, *p; p = s; /* ignore trailing spaces (possibly followed by other switches) */ do { for (e = p; *e && !isSPACE(*e); e++) ; p = e; while (isSPACE(*p)) p++; } while (*p && *p != '-'); e = savepvn(s, e-s); incpush(e, TRUE, TRUE, FALSE, FALSE); Safefree(e); s = p; if (*s == '-') s++; } else Perl_croak(aTHX_ "No directory specified for -I"); return s; case 'l': PL_minus_l = TRUE; s++; if (PL_ors_sv) { SvREFCNT_dec(PL_ors_sv); PL_ors_sv = Nullsv; } if (isDIGIT(*s)) { I32 flags = 0; STRLEN numlen; PL_ors_sv = newSVpvn("\n",1); numlen = 3 + (*s == '0'); *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL); s += numlen; } else { if (RsPARA(PL_rs)) { PL_ors_sv = newSVpvn("\n\n",2); } else { PL_ors_sv = newSVsv(PL_rs); } } return s; case 'A': forbid_setid("-A"); if (!PL_preambleav) PL_preambleav = newAV(); s++; { char * const start = s; SV * const sv = newSVpv("use assertions::activate", 24); while(isALNUM(*s) || *s == ':') ++s; if (s != start) { sv_catpvn(sv, "::", 2); sv_catpvn(sv, start, s-start); } if (*s == '=') { Perl_sv_catpvf(aTHX_ sv, " split(/,/,q%c%s%c)", 0, ++s, 0); s+=strlen(s); } else if (*s != '\0') { Perl_croak(aTHX_ "Can't use '%c' after -A%.*s", *s, (int)(s-start), start); } av_push(PL_preambleav, sv); return s; } case 'M': forbid_setid("-M"); /* XXX ? */ /* FALL THROUGH */ case 'm': forbid_setid("-m"); /* XXX ? */ if (*++s) { char *start; SV *sv; const char *use = "use "; /* -M-foo == 'no foo' */ /* Leading space on " no " is deliberate, to make both possibilities the same length. */ if (*s == '-') { use = " no "; ++s; } sv = newSVpvn(use,4); start = s; /* We allow -M'Module qw(Foo Bar)' */ while(isALNUM(*s) || *s==':') ++s; if (*s != '=') { sv_catpv(sv, start); if (*(start-1) == 'm') { if (*s != '\0') Perl_croak(aTHX_ "Can't use '%c' after -mname", *s); sv_catpv( sv, " ()"); } } else { if (s == start) Perl_croak(aTHX_ "Module name required with -%c option", s[-1]); sv_catpvn(sv, start, s-start); sv_catpv(sv, " split(/,/,q"); sv_catpvn(sv, "\0)", 1); /* Use NUL as q//-delimiter. */ sv_catpv(sv, ++s); sv_catpvn(sv, "\0)", 2); } s += strlen(s); if (!PL_preambleav) PL_preambleav = newAV(); av_push(PL_preambleav, sv); } else Perl_croak(aTHX_ "Missing argument to -%c", *(s-1)); return s; case 'n': PL_minus_n = TRUE; s++; return s; case 'p': PL_minus_p = TRUE; s++; return s; case 's': forbid_setid("-s"); PL_doswitches = TRUE; s++; return s; case 't': if (!PL_tainting) TOO_LATE_FOR('t'); s++; return s; case 'T': if (!PL_tainting) TOO_LATE_FOR('T'); s++; return s; case 'u': #ifdef MACOS_TRADITIONAL Perl_croak(aTHX_ "Believe me, you don't want to use \"-u\" on a Macintosh"); #endif PL_do_undump = TRUE; s++; return s; case 'U': PL_unsafe = TRUE; s++; return s; case 'v': if (!sv_derived_from(PL_patchlevel, "version")) (void *)upg_version(PL_patchlevel); #if !defined(DGUX) PerlIO_printf(PerlIO_stdout(), Perl_form(aTHX_ "\nThis is perl, %"SVf" built for %s", vstringify(PL_patchlevel), ARCHNAME)); #else /* DGUX */ /* Adjust verbose output as in the perl that ships with the DG/UX OS from EMC */ PerlIO_printf(PerlIO_stdout(), Perl_form(aTHX_ "\nThis is perl, %"SVf"\n", vstringify(PL_patchlevel))); PerlIO_printf(PerlIO_stdout(), Perl_form(aTHX_ " built under %s at %s %s\n", OSNAME, __DATE__, __TIME__)); PerlIO_printf(PerlIO_stdout(), Perl_form(aTHX_ " OS Specific Release: %s\n", OSVERS)); #endif /* !DGUX */ #if defined(LOCAL_PATCH_COUNT) if (LOCAL_PATCH_COUNT > 0) PerlIO_printf(PerlIO_stdout(), "\n(with %d registered patch%s, " "see perl -V for more detail)", (int)LOCAL_PATCH_COUNT, (LOCAL_PATCH_COUNT!=1) ? "es" : ""); #endif PerlIO_printf(PerlIO_stdout(), "\n\nCopyright 1987-2005, Larry Wall\n"); #ifdef MACOS_TRADITIONAL PerlIO_printf(PerlIO_stdout(), "\nMac OS port Copyright 1991-2002, Matthias Neeracher;\n" "maintained by Chris Nandor\n"); #endif #ifdef MSDOS PerlIO_printf(PerlIO_stdout(), "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n"); #endif #ifdef DJGPP PerlIO_printf(PerlIO_stdout(), "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n" "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n"); #endif #ifdef OS2 PerlIO_printf(PerlIO_stdout(), "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n" "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n"); #endif #ifdef atarist PerlIO_printf(PerlIO_stdout(), "atariST series port, ++jrb bammi@cadence.com\n"); #endif #ifdef __BEOS__ PerlIO_printf(PerlIO_stdout(), "BeOS port Copyright Tom Spindler, 1997-1999\n"); #endif #ifdef MPE PerlIO_printf(PerlIO_stdout(), "MPE/iX port Copyright by Mark Klein and Mark Bixby, 1996-2003\n"); #endif #ifdef OEMVS PerlIO_printf(PerlIO_stdout(), "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n"); #endif #ifdef __VOS__ PerlIO_printf(PerlIO_stdout(), "Stratus VOS port by Paul.Green@stratus.com, 1997-2002\n"); #endif #ifdef __OPEN_VM PerlIO_printf(PerlIO_stdout(), "VM/ESA port by Neale Ferguson, 1998-1999\n"); #endif #ifdef POSIX_BC PerlIO_printf(PerlIO_stdout(), "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n"); #endif #ifdef __MINT__ PerlIO_printf(PerlIO_stdout(), "MiNT port by Guido Flohr, 1997-1999\n"); #endif #ifdef EPOC PerlIO_printf(PerlIO_stdout(), "EPOC port by Olaf Flebbe, 1999-2002\n"); #endif #ifdef UNDER_CE PerlIO_printf(PerlIO_stdout(),"WINCE port by Rainer Keuchel, 2001-2002\n"); PerlIO_printf(PerlIO_stdout(),"Built on " __DATE__ " " __TIME__ "\n\n"); wce_hitreturn(); #endif #ifdef __SYMBIAN32__ PerlIO_printf(PerlIO_stdout(), "Symbian port by Nokia, 2004-2005\n"); #endif #ifdef BINARY_BUILD_NOTICE BINARY_BUILD_NOTICE; #endif PerlIO_printf(PerlIO_stdout(), "\n\ Perl may be copied only under the terms of either the Artistic License or the\n\ GNU General Public License, which may be found in the Perl 5 source kit.\n\n\ Complete documentation for Perl, including FAQ lists, should be found on\n\ this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\ Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n"); my_exit(0); case 'w': if (! (PL_dowarn & G_WARN_ALL_MASK)) PL_dowarn |= G_WARN_ON; s++; return s; case 'W': PL_dowarn = G_WARN_ALL_ON|G_WARN_ON; if (!specialWARN(PL_compiling.cop_warnings)) SvREFCNT_dec(PL_compiling.cop_warnings); PL_compiling.cop_warnings = pWARN_ALL ; s++; return s; case 'X': PL_dowarn = G_WARN_ALL_OFF; if (!specialWARN(PL_compiling.cop_warnings)) SvREFCNT_dec(PL_compiling.cop_warnings); PL_compiling.cop_warnings = pWARN_NONE ; s++; return s; case '*': case ' ': if (s[1] == '-') /* Additional switches on #! line. */ return s+2; break; case '-': case 0: #if defined(WIN32) || !defined(PERL_STRICT_CR) case '\r': #endif case '\n': case '\t': break; #ifdef ALTERNATE_SHEBANG case 'S': /* OS/2 needs -S on "extproc" line. */ break; #endif case 'P': if (PL_preprocess) return s+1; /* FALL THROUGH */ default: Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s); } return Nullch; } /* compliments of Tom Christiansen */ /* unexec() can be found in the Gnu emacs distribution */ /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */ void Perl_my_unexec(pTHX) { #ifdef UNEXEC SV* prog; SV* file; int status = 1; extern int etext; prog = newSVpv(BIN_EXP, 0); sv_catpv(prog, "/perl"); file = newSVpv(PL_origfilename, 0); sv_catpv(file, ".perldump"); unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0); /* unexec prints msg to stderr in case of failure */ PerlProc_exit(status); #else # ifdef VMS # include lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */ # else ABORT(); /* for use with undump */ # endif #endif } /* initialize curinterp */ STATIC void S_init_interp(pTHX) { #ifdef MULTIPLICITY # define PERLVAR(var,type) # define PERLVARA(var,n,type) # if defined(PERL_IMPLICIT_CONTEXT) # if defined(USE_5005THREADS) # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init; # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init; # else /* !USE_5005THREADS */ # define PERLVARI(var,type,init) aTHX->var = init; # define PERLVARIC(var,type,init) aTHX->var = init; # endif /* USE_5005THREADS */ # else # define PERLVARI(var,type,init) PERL_GET_INTERP->var = init; # define PERLVARIC(var,type,init) PERL_GET_INTERP->var = init; # endif # include "intrpvar.h" # ifndef USE_5005THREADS # include "thrdvar.h" # endif # undef PERLVAR # undef PERLVARA # undef PERLVARI # undef PERLVARIC #else # define PERLVAR(var,type) # define PERLVARA(var,n,type) # define PERLVARI(var,type,init) PL_##var = init; # define PERLVARIC(var,type,init) PL_##var = init; # include "intrpvar.h" # ifndef USE_5005THREADS # include "thrdvar.h" # endif # undef PERLVAR # undef PERLVARA # undef PERLVARI # undef PERLVARIC #endif } STATIC void S_init_main_stash(pTHX) { GV *gv; PL_curstash = PL_defstash = newHV(); PL_curstname = newSVpvn("main",4); gv = gv_fetchpv("main::",TRUE, SVt_PVHV); SvREFCNT_dec(GvHV(gv)); GvHV(gv) = (HV*)SvREFCNT_inc(PL_defstash); SvREADONLY_on(gv); hv_name_set(PL_defstash, "main", 4, 0); PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV))); SvREFCNT_inc(PL_incgv); /* Don't allow it to be freed */ GvMULTI_on(PL_incgv); PL_hintgv = gv_fetchpv("\010",TRUE, SVt_PV); /* ^H */ GvMULTI_on(PL_hintgv); PL_defgv = gv_fetchpv("_",TRUE, SVt_PVAV); SvREFCNT_inc(PL_defgv); PL_errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV)); SvREFCNT_inc(PL_errgv); GvMULTI_on(PL_errgv); PL_replgv = gv_fetchpv("\022", TRUE, SVt_PV); /* ^R */ GvMULTI_on(PL_replgv); (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */ #ifdef PERL_DONT_CREATE_GVSV gv_SVadd(PL_errgv); #endif sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */ sv_setpvn(ERRSV, "", 0); PL_curstash = PL_defstash; CopSTASH_set(&PL_compiling, PL_defstash); PL_debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV)); PL_globalstash = GvHV(gv_fetchpv("CORE::GLOBAL::", GV_ADDMULTI, SVt_PVHV)); /* We must init $/ before switches are processed. */ sv_setpvn(get_sv("/", TRUE), "\n", 1); } /* PSz 18 Nov 03 fdscript now global but do not change prototype */ STATIC void S_open_script(pTHX_ const char *scriptname, bool dosearch, SV *sv) { #ifndef IAMSUID const char *quote; const char *code; const char *cpp_discard_flag; const char *perl; #endif dVAR; PL_fdscript = -1; PL_suidscript = -1; if (PL_e_script) { PL_origfilename = savepvn("-e", 2); } else { /* if find_script() returns, it returns a malloc()-ed value */ scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1); if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) { const char *s = scriptname + 8; PL_fdscript = atoi(s); while (isDIGIT(*s)) s++; if (*s) { /* PSz 18 Feb 04 * Tell apart "normal" usage of fdscript, e.g. * with bash on FreeBSD: * perl <( echo '#!perl -DA'; echo 'print "$0\n"') * from usage in suidperl. * Does any "normal" usage leave garbage after the number??? * Is it a mistake to use a similar /dev/fd/ construct for * suidperl? */ PL_suidscript = 1; /* PSz 20 Feb 04 * Be supersafe and do some sanity-checks. * Still, can we be sure we got the right thing? */ if (*s != '/') { Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s); } if (! *(s+1)) { Perl_croak(aTHX_ "Missing (suid) fd script name\n"); } scriptname = savepv(s + 1); Safefree(PL_origfilename); PL_origfilename = (char *)scriptname; } } } CopFILE_free(PL_curcop); CopFILE_set(PL_curcop, PL_origfilename); if (*PL_origfilename == '-' && PL_origfilename[1] == '\0') scriptname = (char *)""; if (PL_fdscript >= 0) { PL_rsfp = PerlIO_fdopen(PL_fdscript,PERL_SCRIPT_MODE); # if defined(HAS_FCNTL) && defined(F_SETFD) if (PL_rsfp) /* ensure close-on-exec */ fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); # endif } #ifdef IAMSUID else { Perl_croak(aTHX_ "sperl needs fd script\n" "You should not call sperl directly; do you need to " "change a #! line\nfrom sperl to perl?\n"); /* PSz 11 Nov 03 * Do not open (or do other fancy stuff) while setuid. * Perl does the open, and hands script to suidperl on a fd; * suidperl only does some checks, sets up UIDs and re-execs * perl with that fd as it has always done. */ } if (PL_suidscript != 1) { Perl_croak(aTHX_ "suidperl needs (suid) fd script\n"); } #else /* IAMSUID */ else if (PL_preprocess) { const char * const cpp_cfg = CPPSTDIN; SV * const cpp = newSVpvn("",0); SV * const cmd = NEWSV(0,0); if (cpp_cfg[0] == 0) /* PERL_MICRO? */ Perl_croak(aTHX_ "Can't run with cpp -P with CPPSTDIN undefined"); if (strEQ(cpp_cfg, "cppstdin")) Perl_sv_catpvf(aTHX_ cpp, "%s/", BIN_EXP); sv_catpv(cpp, cpp_cfg); # ifndef VMS sv_catpvn(sv, "-I", 2); sv_catpv(sv,PRIVLIB_EXP); # endif DEBUG_P(PerlIO_printf(Perl_debug_log, "PL_preprocess: scriptname=\"%s\", cpp=\"%s\", sv=\"%s\", CPPMINUS=\"%s\"\n", scriptname, SvPVX_const (cpp), SvPVX_const (sv), CPPMINUS)); # if defined(MSDOS) || defined(WIN32) || defined(VMS) quote = "\""; # else quote = "'"; # endif # ifdef VMS cpp_discard_flag = ""; # else cpp_discard_flag = "-C"; # endif # ifdef OS2 perl = os2_execname(aTHX); # else perl = PL_origargv[0]; # endif /* This strips off Perl comments which might interfere with the C pre-processor, including #!. #line directives are deliberately stripped to avoid confusion with Perl's version of #line. FWP played some golf with it so it will fit into VMS's 255 character buffer. */ if( PL_doextract ) code = "(1../^#!.*perl/i)|/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print"; else code = "/^\\s*#(?!\\s*((ifn?|un)def|(el|end)?if|define|include|else|error|pragma)\\b)/||!($|=1)||print"; Perl_sv_setpvf(aTHX_ cmd, "\ %s -ne%s%s%s %s | %"SVf" %s %"SVf" %s", perl, quote, code, quote, scriptname, cpp, cpp_discard_flag, sv, CPPMINUS); PL_doextract = FALSE; DEBUG_P(PerlIO_printf(Perl_debug_log, "PL_preprocess: cmd=\"%s\"\n", SvPVX_const(cmd))); PL_rsfp = PerlProc_popen((char *)SvPVX_const(cmd), (char *)"r"); SvREFCNT_dec(cmd); SvREFCNT_dec(cpp); } else if (!*scriptname) { forbid_setid("program input from stdin"); PL_rsfp = PerlIO_stdin(); } else { PL_rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE); # if defined(HAS_FCNTL) && defined(F_SETFD) if (PL_rsfp) /* ensure close-on-exec */ fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,1); # endif } #endif /* IAMSUID */ if (!PL_rsfp) { /* PSz 16 Sep 03 Keep neat error message */ if (PL_e_script) Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno)); else Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n", CopFILE(PL_curcop), Strerror(errno)); } } /* Mention * I_SYSSTATVFS HAS_FSTATVFS * I_SYSMOUNT * I_STATFS HAS_FSTATFS HAS_GETFSSTAT * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT * here so that metaconfig picks them up. */ #ifdef IAMSUID STATIC int S_fd_on_nosuid_fs(pTHX_ int fd) { /* PSz 27 Feb 04 * We used to do this as "plain" user (after swapping UIDs with setreuid); * but is needed also on machines without setreuid. * Seems safe enough to run as root. */ int check_okay = 0; /* able to do all the required sys/libcalls */ int on_nosuid = 0; /* the fd is on a nosuid fs */ /* PSz 12 Nov 03 * Need to check noexec also: nosuid might not be set, the average * sysadmin would say that nosuid is irrelevant once he sets noexec. */ int on_noexec = 0; /* the fd is on a noexec fs */ /* * Preferred order: fstatvfs(), fstatfs(), ustat()+getmnt(), getmntent(). * fstatvfs() is UNIX98. * fstatfs() is 4.3 BSD. * ustat()+getmnt() is pre-4.3 BSD. * getmntent() is O(number-of-mounted-filesystems) and can hang on * an irrelevant filesystem while trying to reach the right one. */ #undef FD_ON_NOSUID_CHECK_OKAY /* found the syscalls to do the check? */ # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \ defined(HAS_FSTATVFS) # define FD_ON_NOSUID_CHECK_OKAY struct statvfs stfs; check_okay = fstatvfs(fd, &stfs) == 0; on_nosuid = check_okay && (stfs.f_flag & ST_NOSUID); #ifdef ST_NOEXEC /* ST_NOEXEC certainly absent on AIX 5.1, and doesn't seem to be documented on platforms where it is present. */ on_noexec = check_okay && (stfs.f_flag & ST_NOEXEC); #endif # endif /* fstatvfs */ # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \ defined(PERL_MOUNT_NOSUID) && \ defined(PERL_MOUNT_NOEXEC) && \ defined(HAS_FSTATFS) && \ defined(HAS_STRUCT_STATFS) && \ defined(HAS_STRUCT_STATFS_F_FLAGS) # define FD_ON_NOSUID_CHECK_OKAY struct statfs stfs; check_okay = fstatfs(fd, &stfs) == 0; on_nosuid = check_okay && (stfs.f_flags & PERL_MOUNT_NOSUID); on_noexec = check_okay && (stfs.f_flags & PERL_MOUNT_NOEXEC); # endif /* fstatfs */ # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \ defined(PERL_MOUNT_NOSUID) && \ defined(PERL_MOUNT_NOEXEC) && \ defined(HAS_FSTAT) && \ defined(HAS_USTAT) && \ defined(HAS_GETMNT) && \ defined(HAS_STRUCT_FS_DATA) && \ defined(NOSTAT_ONE) # define FD_ON_NOSUID_CHECK_OKAY Stat_t fdst; if (fstat(fd, &fdst) == 0) { struct ustat us; if (ustat(fdst.st_dev, &us) == 0) { struct fs_data fsd; /* NOSTAT_ONE here because we're not examining fields which * vary between that case and STAT_ONE. */ if (getmnt((int*)0, &fsd, (int)0, NOSTAT_ONE, us.f_fname) == 0) { size_t cmplen = sizeof(us.f_fname); if (sizeof(fsd.fd_req.path) < cmplen) cmplen = sizeof(fsd.fd_req.path); if (strnEQ(fsd.fd_req.path, us.f_fname, cmplen) && fdst.st_dev == fsd.fd_req.dev) { check_okay = 1; on_nosuid = fsd.fd_req.flags & PERL_MOUNT_NOSUID; on_noexec = fsd.fd_req.flags & PERL_MOUNT_NOEXEC; } } } } # endif /* fstat+ustat+getmnt */ # if !defined(FD_ON_NOSUID_CHECK_OKAY) && \ defined(HAS_GETMNTENT) && \ defined(HAS_HASMNTOPT) && \ defined(MNTOPT_NOSUID) && \ defined(MNTOPT_NOEXEC) # define FD_ON_NOSUID_CHECK_OKAY FILE *mtab = fopen("/etc/mtab", "r"); struct mntent *entry; Stat_t stb, fsb; if (mtab && (fstat(fd, &stb) == 0)) { while (entry = getmntent(mtab)) { if (stat(entry->mnt_dir, &fsb) == 0 && fsb.st_dev == stb.st_dev) { /* found the filesystem */ check_okay = 1; if (hasmntopt(entry, MNTOPT_NOSUID)) on_nosuid = 1; if (hasmntopt(entry, MNTOPT_NOEXEC)) on_noexec = 1; break; } /* A single fs may well fail its stat(). */ } } if (mtab) fclose(mtab); # endif /* getmntent+hasmntopt */ if (!check_okay) Perl_croak(aTHX_ "Can't check filesystem of script \"%s\" for nosuid/noexec", PL_origfilename); if (on_nosuid) Perl_croak(aTHX_ "Setuid script \"%s\" on nosuid filesystem", PL_origfilename); if (on_noexec) Perl_croak(aTHX_ "Setuid script \"%s\" on noexec filesystem", PL_origfilename); return ((!check_okay) || on_nosuid || on_noexec); } #endif /* IAMSUID */ STATIC void S_validate_suid(pTHX_ const char *validarg, const char *scriptname) { dVAR; #ifdef IAMSUID /* int which; */ #endif /* IAMSUID */ /* do we need to emulate setuid on scripts? */ /* This code is for those BSD systems that have setuid #! scripts disabled * in the kernel because of a security problem. Merely defining DOSUID * in perl will not fix that problem, but if you have disabled setuid * scripts in the kernel, this will attempt to emulate setuid and setgid * on scripts that have those now-otherwise-useless bits set. The setuid * root version must be called suidperl or sperlN.NNN. If regular perl * discovers that it has opened a setuid script, it calls suidperl with * the same argv that it had. If suidperl finds that the script it has * just opened is NOT setuid root, it sets the effective uid back to the * uid. We don't just make perl setuid root because that loses the * effective uid we had before invoking perl, if it was different from the * uid. * PSz 27 Feb 04 * Description/comments above do not match current workings: * suidperl must be hardlinked to sperlN.NNN (that is what we exec); * suidperl called with script open and name changed to /dev/fd/N/X; * suidperl croaks if script is not setuid; * making perl setuid would be a huge security risk (and yes, that * would lose any euid we might have had). * * DOSUID must be defined in both perl and suidperl, and IAMSUID must * be defined in suidperl only. suidperl must be setuid root. The * Configure script will set this up for you if you want it. */ #ifdef DOSUID const char *s, *s2; if (PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf) < 0) /* normal stat is insecure */ Perl_croak(aTHX_ "Can't stat script \"%s\"",PL_origfilename); if (PL_statbuf.st_mode & (S_ISUID|S_ISGID)) { I32 len; const char *linestr; const char *s_end; #ifdef IAMSUID if (PL_fdscript < 0 || PL_suidscript != 1) Perl_croak(aTHX_ "Need (suid) fdscript in suidperl\n"); /* We already checked this */ /* PSz 11 Nov 03 * Since the script is opened by perl, not suidperl, some of these * checks are superfluous. Leaving them in probably does not lower * security(?!). */ /* PSz 27 Feb 04 * Do checks even for systems with no HAS_SETREUID. * We used to swap, then re-swap UIDs with #ifdef HAS_SETREUID if (setreuid(PL_euid,PL_uid) < 0 || PerlProc_getuid() != PL_euid || PerlProc_geteuid() != PL_uid) Perl_croak(aTHX_ "Can't swap uid and euid"); #endif #ifdef HAS_SETREUID if (setreuid(PL_uid,PL_euid) < 0 || PerlProc_getuid() != PL_uid || PerlProc_geteuid() != PL_euid) Perl_croak(aTHX_ "Can't reswap uid and euid"); #endif */ /* On this access check to make sure the directories are readable, * there is actually a small window that the user could use to make * filename point to an accessible directory. So there is a faint * chance that someone could execute a setuid script down in a * non-accessible directory. I don't know what to do about that. * But I don't think it's too important. The manual lies when * it says access() is useful in setuid programs. * * So, access() is pretty useless... but not harmful... do anyway. */ if (PerlLIO_access(CopFILE(PL_curcop),1)) { /*double check*/ Perl_croak(aTHX_ "Can't access() script\n"); } /* If we can swap euid and uid, then we can determine access rights * with a simple stat of the file, and then compare device and * inode to make sure we did stat() on the same file we opened. * Then we just have to make sure he or she can execute it. * * PSz 24 Feb 04 * As the script is opened by perl, not suidperl, we do not need to * care much about access rights. * * The 'script changed' check is needed, or we can get lied to * about $0 with e.g. * suidperl /dev/fd/4//bin/x 4 4000) Perl_croak(aTHX_ "Very long #! line"); /* Allow more than a single space after #! */ while (isSPACE(*s)) s++; /* Sanity check on buffer end */ while ((*s) && !isSPACE(*s)) s++; for (s2 = s; (s2 > linestr && (isDIGIT(s2[-1]) || s2[-1] == '.' || s2[-1] == '_' || s2[-1] == '-')); s2--) ; /* Sanity check on buffer start */ if ( (s2-4 < linestr || strnNE(s2-4,"perl",4)) && (s-9 < linestr || strnNE(s-9,"perl",4)) ) Perl_croak(aTHX_ "Not a perl script"); while (*s == ' ' || *s == '\t') s++; /* * #! arg must be what we saw above. They can invoke it by * mentioning suidperl explicitly, but they may not add any strange * arguments beyond what #! says if they do invoke suidperl that way. */ /* * The way validarg was set up, we rely on the kernel to start * scripts with argv[1] set to contain all #! line switches (the * whole line). */ /* * Check that we got all the arguments listed in the #! line (not * just that there are no extraneous arguments). Might not matter * much, as switches from #! line seem to be acted upon (also), and * so may be checked and trapped in perl. But, security checks must * be done in suidperl and not deferred to perl. Note that suidperl * does not get around to parsing (and checking) the switches on * the #! line (but execs perl sooner). * Allow (require) a trailing newline (which may be of two * characters on some architectures?) (but no other trailing * whitespace). */ len = strlen(validarg); if (strEQ(validarg," PHOOEY ") || strnNE(s,validarg,len) || !isSPACE(s[len]) || !((s_end - s) == len+1 || ((s_end - s) == len+2 && isSPACE(s[len+1])))) Perl_croak(aTHX_ "Args must match #! line"); #ifndef IAMSUID if (PL_fdscript < 0 && PL_euid != PL_uid && (PL_statbuf.st_mode & S_ISUID) && PL_euid == PL_statbuf.st_uid) if (!PL_do_undump) Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ FIX YOUR KERNEL, OR PUT A C WRAPPER AROUND THIS SCRIPT!\n"); #endif /* IAMSUID */ if (PL_fdscript < 0 && PL_euid) { /* oops, we're not the setuid root perl */ /* PSz 18 Feb 04 * When root runs a setuid script, we do not go through the same * steps of execing sperl and then perl with fd scripts, but * simply set up UIDs within the same perl invocation; so do * not have the same checks (on options, whatever) that we have * for plain users. No problem really: would have to be a script * that does not actually work for plain users; and if root is * foolish and can be persuaded to run such an unsafe script, he * might run also non-setuid ones, and deserves what he gets. * * Or, we might drop the PL_euid check above (and rely just on * PL_fdscript to avoid loops), and do the execs * even for root. */ #ifndef IAMSUID int which; /* PSz 11 Nov 03 * Pass fd script to suidperl. * Exec suidperl, substituting fd script for scriptname. * Pass script name as "subdir" of fd, which perl will grok; * in fact will use that to distinguish this from "normal" * usage, see comments above. */ PerlIO_rewind(PL_rsfp); PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */ /* PSz 27 Feb 04 Sanity checks on scriptname */ if ((!scriptname) || (!*scriptname) ) { Perl_croak(aTHX_ "No setuid script name\n"); } if (*scriptname == '-') { Perl_croak(aTHX_ "Setuid script name may not begin with dash\n"); /* Or we might confuse it with an option when replacing * name in argument list, below (though we do pointer, not * string, comparisons). */ } for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; if (!PL_origargv[which]) { Perl_croak(aTHX_ "Can't change argv to have fd script\n"); } PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", PerlIO_fileno(PL_rsfp), PL_origargv[which])); #if defined(HAS_FCNTL) && defined(F_SETFD) fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */ #endif PERL_FPU_PRE_EXEC PerlProc_execv(Perl_form(aTHX_ "%s/sperl"PERL_FS_VER_FMT, BIN_EXP, (int)PERL_REVISION, (int)PERL_VERSION, (int)PERL_SUBVERSION), PL_origargv); PERL_FPU_POST_EXEC #endif /* IAMSUID */ Perl_croak(aTHX_ "Can't do setuid (cannot exec sperl)\n"); } if (PL_statbuf.st_mode & S_ISGID && PL_statbuf.st_gid != PL_egid) { /* PSz 26 Feb 04 * This seems back to front: we try HAS_SETEGID first; if not available * then try HAS_SETREGID; as a last chance we try HAS_SETRESGID. May be OK * in the sense that we only want to set EGID; but are there any machines * with either of the latter, but not the former? Same with UID, later. */ #ifdef HAS_SETEGID (void)setegid(PL_statbuf.st_gid); #else #ifdef HAS_SETREGID (void)setregid((Gid_t)-1,PL_statbuf.st_gid); #else #ifdef HAS_SETRESGID (void)setresgid((Gid_t)-1,PL_statbuf.st_gid,(Gid_t)-1); #else PerlProc_setgid(PL_statbuf.st_gid); #endif #endif #endif if (PerlProc_getegid() != PL_statbuf.st_gid) Perl_croak(aTHX_ "Can't do setegid!\n"); } if (PL_statbuf.st_mode & S_ISUID) { if (PL_statbuf.st_uid != PL_euid) #ifdef HAS_SETEUID (void)seteuid(PL_statbuf.st_uid); /* all that for this */ #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1,PL_statbuf.st_uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1,PL_statbuf.st_uid,(Uid_t)-1); #else PerlProc_setuid(PL_statbuf.st_uid); #endif #endif #endif if (PerlProc_geteuid() != PL_statbuf.st_uid) Perl_croak(aTHX_ "Can't do seteuid!\n"); } else if (PL_uid) { /* oops, mustn't run as root */ #ifdef HAS_SETEUID (void)seteuid((Uid_t)PL_uid); #else #ifdef HAS_SETREUID (void)setreuid((Uid_t)-1,(Uid_t)PL_uid); #else #ifdef HAS_SETRESUID (void)setresuid((Uid_t)-1,(Uid_t)PL_uid,(Uid_t)-1); #else PerlProc_setuid((Uid_t)PL_uid); #endif #endif #endif if (PerlProc_geteuid() != PL_uid) Perl_croak(aTHX_ "Can't do seteuid!\n"); } init_ids(); if (!cando(S_IXUSR,TRUE,&PL_statbuf)) Perl_croak(aTHX_ "Effective UID cannot exec script\n"); /* they can't do this */ } #ifdef IAMSUID else if (PL_preprocess) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */ Perl_croak(aTHX_ "-P not allowed for setuid/setgid script\n"); else if (PL_fdscript < 0 || PL_suidscript != 1) /* PSz 13 Nov 03 Caught elsewhere, useless(?!) here */ Perl_croak(aTHX_ "(suid) fdscript needed in suidperl\n"); else { /* PSz 16 Sep 03 Keep neat error message */ Perl_croak(aTHX_ "Script is not setuid/setgid in suidperl\n"); } /* We absolutely must clear out any saved ids here, so we */ /* exec the real perl, substituting fd script for scriptname. */ /* (We pass script name as "subdir" of fd, which perl will grok.) */ /* * It might be thought that using setresgid and/or setresuid (changed to * set the saved IDs) above might obviate the need to exec, and we could * go on to "do the perl thing". * * Is there such a thing as "saved GID", and is that set for setuid (but * not setgid) execution like suidperl? Without exec, it would not be * cleared for setuid (but not setgid) scripts (or might need a dummy * setresgid). * * We need suidperl to do the exact same argument checking that perl * does. Thus it cannot be very small; while it could be significantly * smaller, it is safer (simpler?) to make it essentially the same * binary as perl (but they are not identical). - Maybe could defer that * check to the invoked perl, and suidperl be a tiny wrapper instead; * but prefer to do thorough checks in suidperl itself. Such deferral * would make suidperl security rely on perl, a design no-no. * * Setuid things should be short and simple, thus easy to understand and * verify. They should do their "own thing", without influence by * attackers. It may help if their internal execution flow is fixed, * regardless of platform: it may be best to exec anyway. * * Suidperl should at least be conceptually simple: a wrapper only, * never to do any real perl. Maybe we should put * #ifdef IAMSUID * Perl_croak(aTHX_ "Suidperl should never do real perl\n"); * #endif * into the perly bits. */ PerlIO_rewind(PL_rsfp); PerlLIO_lseek(PerlIO_fileno(PL_rsfp),(Off_t)0,0); /* just in case rewind didn't */ /* PSz 11 Nov 03 * Keep original arguments: suidperl already has fd script. */ /* for (which = 1; PL_origargv[which] && PL_origargv[which] != scriptname; which++) ; */ /* if (!PL_origargv[which]) { */ /* errno = EPERM; */ /* Perl_croak(aTHX_ "Permission denied\n"); */ /* } */ /* PL_origargv[which] = savepv(Perl_form(aTHX_ "/dev/fd/%d/%s", */ /* PerlIO_fileno(PL_rsfp), PL_origargv[which])); */ #if defined(HAS_FCNTL) && defined(F_SETFD) fcntl(PerlIO_fileno(PL_rsfp),F_SETFD,0); /* ensure no close-on-exec */ #endif PERL_FPU_PRE_EXEC PerlProc_execv(Perl_form(aTHX_ "%s/perl"PERL_FS_VER_FMT, BIN_EXP, (int)PERL_REVISION, (int)PERL_VERSION, (int)PERL_SUBVERSION), PL_origargv);/* try again */ PERL_FPU_POST_EXEC Perl_croak(aTHX_ "Can't do setuid (suidperl cannot exec perl)\n"); #endif /* IAMSUID */ #else /* !DOSUID */ if (PL_euid != PL_uid || PL_egid != PL_gid) { /* (suidperl doesn't exist, in fact) */ #ifndef SETUID_SCRIPTS_ARE_SECURE_NOW PerlLIO_fstat(PerlIO_fileno(PL_rsfp),&PL_statbuf); /* may be either wrapped or real suid */ if ((PL_euid != PL_uid && PL_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID) || (PL_egid != PL_gid && PL_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID) ) if (!PL_do_undump) Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\ FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n"); #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */ /* not set-id, must be wrapped */ } #endif /* DOSUID */ (void)validarg; (void)scriptname; } STATIC void S_find_beginning(pTHX) { register char *s; register const char *s2; #ifdef MACOS_TRADITIONAL int maclines = 0; #endif /* skip forward in input to the real script? */ forbid_setid("-x"); #ifdef MACOS_TRADITIONAL /* Since the Mac OS does not honor #! arguments for us, we do it ourselves */ while (PL_doextract || gMacPerl_AlwaysExtract) { if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) { if (!gMacPerl_AlwaysExtract) Perl_croak(aTHX_ "No Perl script found in input\n"); if (PL_doextract) /* require explicit override ? */ if (!OverrideExtract(PL_origfilename)) Perl_croak(aTHX_ "User aborted script\n"); else PL_doextract = FALSE; /* Pater peccavi, file does not have #! */ PerlIO_rewind(PL_rsfp); break; } #else while (PL_doextract) { if ((s = sv_gets(PL_linestr, PL_rsfp, 0)) == Nullch) Perl_croak(aTHX_ "No Perl script found in input\n"); #endif s2 = s; if (*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))) { PerlIO_ungetc(PL_rsfp, '\n'); /* to keep line count right */ PL_doextract = FALSE; while (*s && !(isSPACE (*s) || *s == '#')) s++; s2 = s; while (*s == ' ' || *s == '\t') s++; if (*s++ == '-') { while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.' || s2[-1] == '_') s2--; if (strnEQ(s2-4,"perl",4)) while ((s = moreswitches(s))) ; } #ifdef MACOS_TRADITIONAL /* We are always searching for the #!perl line in MacPerl, * so if we find it, still keep the line count correct * by counting lines we already skipped over */ for (; maclines > 0 ; maclines--) PerlIO_ungetc(PL_rsfp, '\n'); break; /* gMacPerl_AlwaysExtract is false in MPW tool */ } else if (gMacPerl_AlwaysExtract) { ++maclines; #endif } } } STATIC void S_init_ids(pTHX) { PL_uid = PerlProc_getuid(); PL_euid = PerlProc_geteuid(); PL_gid = PerlProc_getgid(); PL_egid = PerlProc_getegid(); #ifdef VMS PL_uid |= PL_gid << 16; PL_euid |= PL_egid << 16; #endif /* Should not happen: */ CHECK_MALLOC_TAINT(PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid)); /* BUG */ /* PSz 27 Feb 04 * Should go by suidscript, not uid!=euid: why disallow * system("ls") in scripts run from setuid things? * Or, is this run before we check arguments and set suidscript? * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then? * (We never have suidscript, can we be sure to have fdscript?) * Or must then go by UID checks? See comments in forbid_setid also. */ } /* This is used very early in the lifetime of the program, * before even the options are parsed, so PL_tainting has * not been initialized properly. */ bool Perl_doing_taint(int argc, char *argv[], char *envp[]) { #ifndef PERL_IMPLICIT_SYS /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia * before we have an interpreter-- and the whole point of this * function is to be called at such an early stage. If you are on * a system with PERL_IMPLICIT_SYS but you do have a concept of * "tainted because running with altered effective ids', you'll * have to add your own checks somewhere in here. The two most * known samples of 'implicitness' are Win32 and NetWare, neither * of which has much of concept of 'uids'. */ int uid = PerlProc_getuid(); int euid = PerlProc_geteuid(); int gid = PerlProc_getgid(); int egid = PerlProc_getegid(); (void)envp; #ifdef VMS uid |= gid << 16; euid |= egid << 16; #endif if (uid && (euid != uid || egid != gid)) return 1; #endif /* !PERL_IMPLICIT_SYS */ /* This is a really primitive check; environment gets ignored only * if -T are the first chars together; otherwise one gets * "Too late" message. */ if ( argc > 1 && argv[1][0] == '-' && (argv[1][1] == 't' || argv[1][1] == 'T') ) return 1; return 0; } STATIC void S_forbid_setid(pTHX_ const char *s) { #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW if (PL_euid != PL_uid) Perl_croak(aTHX_ "No %s allowed while running setuid", s); if (PL_egid != PL_gid) Perl_croak(aTHX_ "No %s allowed while running setgid", s); #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */ /* PSz 29 Feb 04 * Checks for UID/GID above "wrong": why disallow * perl -e 'print "Hello\n"' * from within setuid things?? Simply drop them: replaced by * fdscript/suidscript and #ifdef IAMSUID checks below. * * This may be too late for command-line switches. Will catch those on * the #! line, after finding the script name and setting up * fdscript/suidscript. Note that suidperl does not get around to * parsing (and checking) the switches on the #! line, but checks that * the two sets are identical. * * With SETUID_SCRIPTS_ARE_SECURE_NOW, could we use fdscript, also or * instead, or would that be "too late"? (We never have suidscript, can * we be sure to have fdscript?) * * Catch things with suidscript (in descendant of suidperl), even with * right UID/GID. Was already checked in suidperl, with #ifdef IAMSUID, * below; but I am paranoid. * * Also see comments about root running a setuid script, elsewhere. */ if (PL_suidscript >= 0) Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", s); #ifdef IAMSUID /* PSz 11 Nov 03 Catch it in suidperl, always! */ Perl_croak(aTHX_ "No %s allowed in suidperl", s); #endif /* IAMSUID */ } void Perl_init_debugger(pTHX) { HV * const ostash = PL_curstash; PL_curstash = PL_debstash; PL_dbargs = GvAV(gv_AVadd((gv_fetchpv("DB::args", GV_ADDMULTI, SVt_PVAV)))); AvREAL_off(PL_dbargs); PL_DBgv = gv_fetchpv("DB::DB", GV_ADDMULTI, SVt_PVGV); PL_DBline = gv_fetchpv("DB::dbline", GV_ADDMULTI, SVt_PVAV); PL_DBsub = gv_HVadd(gv_fetchpv("DB::sub", GV_ADDMULTI, SVt_PVHV)); PL_DBsingle = GvSV((gv_fetchpv("DB::single", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBsingle, 0); PL_DBtrace = GvSV((gv_fetchpv("DB::trace", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBtrace, 0); PL_DBsignal = GvSV((gv_fetchpv("DB::signal", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBsignal, 0); PL_DBassertion = GvSV((gv_fetchpv("DB::assertion", GV_ADDMULTI, SVt_PV))); sv_setiv(PL_DBassertion, 0); PL_curstash = ostash; } #ifndef STRESS_REALLOC #define REASONABLE(size) (size) #else #define REASONABLE(size) (1) /* unreasonable */ #endif void Perl_init_stacks(pTHX) { /* start with 128-item stack and 8K cxstack */ PL_curstackinfo = new_stackinfo(REASONABLE(128), REASONABLE(8192/sizeof(PERL_CONTEXT) - 1)); PL_curstackinfo->si_type = PERLSI_MAIN; PL_curstack = PL_curstackinfo->si_stack; PL_mainstack = PL_curstack; /* remember in case we switch stacks */ PL_stack_base = AvARRAY(PL_curstack); PL_stack_sp = PL_stack_base; PL_stack_max = PL_stack_base + AvMAX(PL_curstack); Newx(PL_tmps_stack,REASONABLE(128),SV*); PL_tmps_floor = -1; PL_tmps_ix = -1; PL_tmps_max = REASONABLE(128); Newx(PL_markstack,REASONABLE(32),I32); PL_markstack_ptr = PL_markstack; PL_markstack_max = PL_markstack + REASONABLE(32); SET_MARK_OFFSET; Newx(PL_scopestack,REASONABLE(32),I32); PL_scopestack_ix = 0; PL_scopestack_max = REASONABLE(32); Newx(PL_savestack,REASONABLE(128),ANY); PL_savestack_ix = 0; PL_savestack_max = REASONABLE(128); } #undef REASONABLE STATIC void S_nuke_stacks(pTHX) { while (PL_curstackinfo->si_next) PL_curstackinfo = PL_curstackinfo->si_next; while (PL_curstackinfo) { PERL_SI *p = PL_curstackinfo->si_prev; /* curstackinfo->si_stack got nuked by sv_free_arenas() */ Safefree(PL_curstackinfo->si_cxstack); Safefree(PL_curstackinfo); PL_curstackinfo = p; } Safefree(PL_tmps_stack); Safefree(PL_markstack); Safefree(PL_scopestack); Safefree(PL_savestack); } STATIC void S_init_lexer(pTHX) { PerlIO *tmpfp; tmpfp = PL_rsfp; PL_rsfp = Nullfp; lex_start(PL_linestr); PL_rsfp = tmpfp; PL_subname = newSVpvn("main",4); } STATIC void S_init_predump_symbols(pTHX) { GV *tmpgv; IO *io; sv_setpvn(get_sv("\"", TRUE), " ", 1); PL_stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO); GvMULTI_on(PL_stdingv); io = GvIOp(PL_stdingv); IoTYPE(io) = IoTYPE_RDONLY; IoIFP(io) = PerlIO_stdin(); tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io); tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO); GvMULTI_on(tmpgv); io = GvIOp(tmpgv); IoTYPE(io) = IoTYPE_WRONLY; IoOFP(io) = IoIFP(io) = PerlIO_stdout(); setdefout(tmpgv); tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io); PL_stderrgv = gv_fetchpv("STDERR",TRUE, SVt_PVIO); GvMULTI_on(PL_stderrgv); io = GvIOp(PL_stderrgv); IoTYPE(io) = IoTYPE_WRONLY; IoOFP(io) = IoIFP(io) = PerlIO_stderr(); tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV); GvMULTI_on(tmpgv); GvIOp(tmpgv) = (IO*)SvREFCNT_inc(io); PL_statname = NEWSV(66,0); /* last filename we did stat on */ Safefree(PL_osname); PL_osname = savepv(OSNAME); } void Perl_init_argv_symbols(pTHX_ register int argc, register char **argv) { argc--,argv++; /* skip name of script */ if (PL_doswitches) { for (; argc > 0 && **argv == '-'; argc--,argv++) { char *s; if (!argv[0][1]) break; if (argv[0][1] == '-' && !argv[0][2]) { argc--,argv++; break; } if ((s = strchr(argv[0], '='))) { *s++ = '\0'; sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s); } else sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1); } } if ((PL_argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV))) { GvMULTI_on(PL_argvgv); (void)gv_AVadd(PL_argvgv); av_clear(GvAVn(PL_argvgv)); for (; argc > 0; argc--,argv++) { SV * const sv = newSVpv(argv[0],0); av_push(GvAVn(PL_argvgv),sv); if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) { if (PL_unicode & PERL_UNICODE_ARGV_FLAG) SvUTF8_on(sv); } if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */ (void)sv_utf8_decode(sv); } } } STATIC void S_init_postdump_symbols(pTHX_ register int argc, register char **argv, register char **env) { dVAR; GV* tmpgv; PL_toptarget = NEWSV(0,0); sv_upgrade(PL_toptarget, SVt_PVFM); sv_setpvn(PL_toptarget, "", 0); PL_bodytarget = NEWSV(0,0); sv_upgrade(PL_bodytarget, SVt_PVFM); sv_setpvn(PL_bodytarget, "", 0); PL_formtarget = PL_bodytarget; TAINT; init_argv_symbols(argc,argv); if ((tmpgv = gv_fetchpv("0",TRUE, SVt_PV))) { #ifdef MACOS_TRADITIONAL /* $0 is not majick on a Mac */ sv_setpv(GvSV(tmpgv),MacPerl_MPWFileName(PL_origfilename)); #else sv_setpv(GvSV(tmpgv),PL_origfilename); magicname("0", "0", 1); #endif } if ((PL_envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV))) { HV *hv; GvMULTI_on(PL_envgv); hv = GvHVn(PL_envgv); hv_magic(hv, Nullgv, PERL_MAGIC_env); #ifndef PERL_MICRO #ifdef USE_ENVIRON_ARRAY /* Note that if the supplied env parameter is actually a copy of the global environ then it may now point to free'd memory if the environment has been modified since. To avoid this problem we treat env==NULL as meaning 'use the default' */ if (!env) env = environ; if (env != environ # ifdef USE_ITHREADS && PL_curinterp == aTHX # endif ) { environ[0] = Nullch; } if (env) { char** origenv = environ; char *s; SV *sv; for (; *env; env++) { if (!(s = strchr(*env,'=')) || s == *env) continue; #if defined(MSDOS) && !defined(DJGPP) *s = '\0'; (void)strupr(*env); *s = '='; #endif sv = newSVpv(s+1, 0); (void)hv_store(hv, *env, s - *env, sv, 0); if (env != environ) mg_set(sv); if (origenv != environ) { /* realloc has shifted us */ env = (env - origenv) + environ; origenv = environ; } } } #endif /* USE_ENVIRON_ARRAY */ #endif /* !PERL_MICRO */ } TAINT_NOT; if ((tmpgv = gv_fetchpv("$",TRUE, SVt_PV))) { SvREADONLY_off(GvSV(tmpgv)); sv_setiv(GvSV(tmpgv), (IV)PerlProc_getpid()); SvREADONLY_on(GvSV(tmpgv)); } #ifdef THREADS_HAVE_PIDS PL_ppid = (IV)getppid(); #endif /* touch @F array to prevent spurious warnings 20020415 MJD */ if (PL_minus_a) { (void) get_av("main::F", TRUE | GV_ADDMULTI); } /* touch @- and @+ arrays to prevent spurious warnings 20020415 MJD */ (void) get_av("main::-", TRUE | GV_ADDMULTI); (void) get_av("main::+", TRUE | GV_ADDMULTI); } STATIC void S_init_perllib(pTHX) { char *s; if (!PL_tainting) { #ifndef VMS s = PerlEnv_getenv("PERL5LIB"); /* * It isn't possible to delete an environment variable with * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that * case we treat PERL5LIB as undefined if it has a zero-length value. */ #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV) if (s && *s != '\0') #else if (s) #endif incpush(s, TRUE, TRUE, TRUE, FALSE); else incpush(PerlEnv_getenv("PERLLIB"), FALSE, FALSE, TRUE, FALSE); #else /* VMS */ /* Treat PERL5?LIB as a possible search list logical name -- the * "natural" VMS idiom for a Unix path string. We allow each * element to be a set of |-separated directories for compatibility. */ char buf[256]; int idx = 0; if (my_trnlnm("PERL5LIB",buf,0)) do { incpush(buf,TRUE,TRUE,TRUE,FALSE); } while (my_trnlnm("PERL5LIB",buf,++idx)); else while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf,FALSE,FALSE,TRUE,FALSE); #endif /* VMS */ } /* Use the ~-expanded versions of APPLLIB (undocumented), ARCHLIB PRIVLIB SITEARCH SITELIB VENDORARCH and VENDORLIB */ #ifdef APPLLIB_EXP incpush(APPLLIB_EXP, TRUE, TRUE, TRUE, TRUE); #endif #ifdef ARCHLIB_EXP incpush(ARCHLIB_EXP, FALSE, FALSE, TRUE, TRUE); #endif #ifdef MACOS_TRADITIONAL { Stat_t tmpstatbuf; SV * privdir = NEWSV(55, 0); char * macperl = PerlEnv_getenv("MACPERL"); if (!macperl) macperl = ""; Perl_sv_setpvf(aTHX_ privdir, "%slib:", macperl); if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE); Perl_sv_setpvf(aTHX_ privdir, "%ssite_perl:", macperl); if (PerlLIO_stat(SvPVX(privdir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) incpush(SvPVX(privdir), TRUE, FALSE, TRUE, FALSE); SvREFCNT_dec(privdir); } if (!PL_tainting) incpush(":", FALSE, FALSE, TRUE, FALSE); #else #ifndef PRIVLIB_EXP # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl" #endif #if defined(WIN32) incpush(PRIVLIB_EXP, TRUE, FALSE, TRUE, TRUE); #else incpush(PRIVLIB_EXP, FALSE, FALSE, TRUE, TRUE); #endif #ifdef SITEARCH_EXP /* sitearch is always relative to sitelib on Windows for * DLL-based path intuition to work correctly */ # if !defined(WIN32) incpush(SITEARCH_EXP, FALSE, FALSE, TRUE, TRUE); # endif #endif #ifdef SITELIB_EXP # if defined(WIN32) /* this picks up sitearch as well */ incpush(SITELIB_EXP, TRUE, FALSE, TRUE, TRUE); # else incpush(SITELIB_EXP, FALSE, FALSE, TRUE, TRUE); # endif #endif #ifdef SITELIB_STEM /* Search for version-specific dirs below here */ incpush(SITELIB_STEM, FALSE, TRUE, TRUE, TRUE); #endif #ifdef PERL_VENDORARCH_EXP /* vendorarch is always relative to vendorlib on Windows for * DLL-based path intuition to work correctly */ # if !defined(WIN32) incpush(PERL_VENDORARCH_EXP, FALSE, FALSE, TRUE, TRUE); # endif #endif #ifdef PERL_VENDORLIB_EXP # if defined(WIN32) incpush(PERL_VENDORLIB_EXP, TRUE, FALSE, TRUE, TRUE); /* this picks up vendorarch as well */ # else incpush(PERL_VENDORLIB_EXP, FALSE, FALSE, TRUE, TRUE); # endif #endif #ifdef PERL_VENDORLIB_STEM /* Search for version-specific dirs below here */ incpush(PERL_VENDORLIB_STEM, FALSE, TRUE, TRUE, TRUE); #endif #ifdef PERL_OTHERLIBDIRS incpush(PERL_OTHERLIBDIRS, TRUE, TRUE, TRUE, TRUE); #endif if (!PL_tainting) incpush(".", FALSE, FALSE, TRUE, FALSE); #endif /* MACOS_TRADITIONAL */ } #if defined(DOSISH) || defined(EPOC) || defined(__SYMBIAN32__) # define PERLLIB_SEP ';' #else # if defined(VMS) # define PERLLIB_SEP '|' # else # if defined(MACOS_TRADITIONAL) # define PERLLIB_SEP ',' # else # define PERLLIB_SEP ':' # endif # endif #endif #ifndef PERLLIB_MANGLE # define PERLLIB_MANGLE(s,n) (s) #endif /* Push a directory onto @INC if it exists. Generate a new SV if we do this, to save needing to copy the SV we push onto @INC */ STATIC SV * S_incpush_if_exists(pTHX_ SV *dir) { Stat_t tmpstatbuf; if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 && S_ISDIR(tmpstatbuf.st_mode)) { av_push(GvAVn(PL_incgv), dir); dir = NEWSV(0,0); } return dir; } STATIC void S_incpush(pTHX_ const char *dir, bool addsubdirs, bool addoldvers, bool usesep, bool canrelocate) { SV *subdir = Nullsv; const char *p = dir; if (!p || !*p) return; if (addsubdirs || addoldvers) { subdir = NEWSV(0,0); } /* Break at all separators */ while (p && *p) { SV *libdir = NEWSV(55,0); const char *s; /* skip any consecutive separators */ if (usesep) { while ( *p == PERLLIB_SEP ) { /* Uncomment the next line for PATH semantics */ /* av_push(GvAVn(PL_incgv), newSVpvn(".", 1)); */ p++; } } if ( usesep && (s = strchr(p, PERLLIB_SEP)) != Nullch ) { sv_setpvn(libdir, PERLLIB_MANGLE(p, (STRLEN)(s - p)), (STRLEN)(s - p)); p = s + 1; } else { sv_setpv(libdir, PERLLIB_MANGLE(p, 0)); p = Nullch; /* break out */ } #ifdef MACOS_TRADITIONAL if (!strchr(SvPVX(libdir), ':')) { char buf[256]; sv_setpv(libdir, MacPerl_CanonDir(SvPVX(libdir), buf, 0)); } if (SvPVX(libdir)[SvCUR(libdir)-1] != ':') sv_catpv(libdir, ":"); #endif /* Do the if() outside the #ifdef to avoid warnings about an unused parameter. */ if (canrelocate) { #ifdef PERL_RELOCATABLE_INC /* * Relocatable include entries are marked with a leading .../ * * The algorithm is * 0: Remove that leading ".../" * 1: Remove trailing executable name (anything after the last '/') * from the perl path to give a perl prefix * Then * While the @INC element starts "../" and the prefix ends with a real * directory (ie not . or ..) chop that real directory off the prefix * and the leading "../" from the @INC element. ie a logical "../" * cleanup * Finally concatenate the prefix and the remainder of the @INC element * The intent is that /usr/local/bin/perl and .../../lib/perl5 * generates /usr/local/lib/perl5 */ const char *libpath = SvPVX(libdir); STRLEN libpath_len = SvCUR(libdir); if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) { /* Game on! */ SV * const caret_X = get_sv("\030", 0); /* Going to use the SV just as a scratch buffer holding a C string: */ SV *prefix_sv; char *prefix; char *lastslash; /* $^X is *the* source of taint if tainting is on, hence SvPOK() won't be true. */ assert(caret_X); assert(SvPOKp(caret_X)); prefix_sv = newSVpvn(SvPVX(caret_X), SvCUR(caret_X)); /* Firstly take off the leading .../ If all else fail we'll do the paths relative to the current directory. */ sv_chop(libdir, libpath + 4); /* Don't use SvPV as we're intentionally bypassing taining, mortal copies that the mg_get of tainting creates, and corruption that seems to come via the save stack. I guess that the save stack isn't correctly set up yet. */ libpath = SvPVX(libdir); libpath_len = SvCUR(libdir); /* This would work more efficiently with memrchr, but as it's only a GNU extension we'd need to probe for it and implement our own. Not hard, but maybe not worth it? */ prefix = SvPVX(prefix_sv); lastslash = strrchr(prefix, '/'); /* First time in with the *lastslash = '\0' we just wipe off the trailing /perl from (say) /usr/foo/bin/perl */ if (lastslash) { SV *tempsv; while ((*lastslash = '\0'), /* Do that, come what may. */ (libpath_len >= 3 && memEQ(libpath, "../", 3) && (lastslash = strrchr(prefix, '/')))) { if (lastslash[1] == '\0' || (lastslash[1] == '.' && (lastslash[2] == '/' /* ends "/." */ || (lastslash[2] == '/' && lastslash[3] == '/' /* or "/.." */ )))) { /* Prefix ends "/" or "/." or "/..", any of which are fishy, so don't do any more logical cleanup. */ break; } /* Remove leading "../" from path */ libpath += 3; libpath_len -= 3; /* Next iteration round the loop removes the last directory name from prefix by writing a '\0' in the while clause. */ } /* prefix has been terminated with a '\0' to the correct length. libpath points somewhere into the libdir SV. We need to join the 2 with '/' and drop the result into libdir. */ tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath); SvREFCNT_dec(libdir); /* And this is the new libdir. */ libdir = tempsv; if (PL_tainting && (PL_uid != PL_euid || PL_gid != PL_egid)) { /* Need to taint reloccated paths if running set ID */ SvTAINTED_on(libdir); } } SvREFCNT_dec(prefix_sv); } #endif } /* * BEFORE pushing libdir onto @INC we may first push version- and * archname-specific sub-directories. */ if (addsubdirs || addoldvers) { #ifdef PERL_INC_VERSION_LIST /* Configure terminates PERL_INC_VERSION_LIST with a NULL */ const char * const incverlist[] = { PERL_INC_VERSION_LIST }; const char * const *incver; #endif #ifdef VMS char *unix; STRLEN len; if ((unix = tounixspec_ts(SvPV(libdir,len),Nullch)) != Nullch) { len = strlen(unix); while (unix[len-1] == '/') len--; /* Cosmetic */ sv_usepvn(libdir,unix,len); } else PerlIO_printf(Perl_error_log, "Failed to unixify @INC element \"%s\"\n", SvPV(libdir,len)); #endif if (addsubdirs) { #ifdef MACOS_TRADITIONAL #define PERL_AV_SUFFIX_FMT "" #define PERL_ARCH_FMT "%s:" #define PERL_ARCH_FMT_PATH PERL_FS_VER_FMT PERL_AV_SUFFIX_FMT #else #define PERL_AV_SUFFIX_FMT "/" #define PERL_ARCH_FMT "/%s" #define PERL_ARCH_FMT_PATH PERL_AV_SUFFIX_FMT PERL_FS_VER_FMT #endif /* .../version/archname if -d .../version/archname */ Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH PERL_ARCH_FMT, libdir, (int)PERL_REVISION, (int)PERL_VERSION, (int)PERL_SUBVERSION, ARCHNAME); subdir = S_incpush_if_exists(aTHX_ subdir); /* .../version if -d .../version */ Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT_PATH, libdir, (int)PERL_REVISION, (int)PERL_VERSION, (int)PERL_SUBVERSION); subdir = S_incpush_if_exists(aTHX_ subdir); /* .../archname if -d .../archname */ Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, ARCHNAME); subdir = S_incpush_if_exists(aTHX_ subdir); } #ifdef PERL_INC_VERSION_LIST if (addoldvers) { for (incver = incverlist; *incver; incver++) { /* .../xxx if -d .../xxx */ Perl_sv_setpvf(aTHX_ subdir, "%"SVf PERL_ARCH_FMT, libdir, *incver); subdir = S_incpush_if_exists(aTHX_ subdir); } } #endif } /* finally push this lib directory on the end of @INC */ av_push(GvAVn(PL_incgv), libdir); } if (subdir) { assert (SvREFCNT(subdir) == 1); SvREFCNT_dec(subdir); } } #ifdef USE_5005THREADS STATIC struct perl_thread * S_init_main_thread(pTHX) { #if !defined(PERL_IMPLICIT_CONTEXT) struct perl_thread *thr; #endif XPV *xpv; Newxz(thr, 1, struct perl_thread); PL_curcop = &PL_compiling; thr->interp = PERL_GET_INTERP; thr->cvcache = newHV(); thr->threadsv = newAV(); /* thr->threadsvp is set when find_threadsv is called */ thr->specific = newAV(); thr->flags = THRf_R_JOINABLE; MUTEX_INIT(&thr->mutex); /* Handcraft thrsv similarly to mess_sv */ Newx(PL_thrsv, 1, SV); Newxz(xpv, 1, XPV); SvFLAGS(PL_thrsv) = SVt_PV; SvANY(PL_thrsv) = (void*)xpv; SvREFCNT(PL_thrsv) = 1 << 30; /* practically infinite */ SvPV_set(PL_thrsvr, (char*)thr); SvCUR_set(PL_thrsv, sizeof(thr)); SvLEN_set(PL_thrsv, sizeof(thr)); *SvEND(PL_thrsv) = '\0'; /* in the trailing_nul field */ thr->oursv = PL_thrsv; PL_chopset = " \n-"; PL_dumpindent = 4; MUTEX_LOCK(&PL_threads_mutex); PL_nthreads++; thr->tid = 0; thr->next = thr; thr->prev = thr; thr->thr_done = 0; MUTEX_UNLOCK(&PL_threads_mutex); #ifdef HAVE_THREAD_INTERN Perl_init_thread_intern(thr); #endif #ifdef SET_THREAD_SELF SET_THREAD_SELF(thr); #else thr->self = pthread_self(); #endif /* SET_THREAD_SELF */ PERL_SET_THX(thr); /* * These must come after the thread self setting * because sv_setpvn does SvTAINT and the taint * fields thread selfness being set. */ PL_toptarget = NEWSV(0,0); sv_upgrade(PL_toptarget, SVt_PVFM); sv_setpvn(PL_toptarget, "", 0); PL_bodytarget = NEWSV(0,0); sv_upgrade(PL_bodytarget, SVt_PVFM); sv_setpvn(PL_bodytarget, "", 0); PL_formtarget = PL_bodytarget; thr->errsv = newSVpvn("", 0); (void) find_threadsv("@"); /* Ensure $@ is initialised early */ PL_maxscream = -1; PL_peepp = MEMBER_TO_FPTR(Perl_peep); PL_regcompp = MEMBER_TO_FPTR(Perl_pregcomp); PL_regexecp = MEMBER_TO_FPTR(Perl_regexec_flags); PL_regint_start = MEMBER_TO_FPTR(Perl_re_intuit_start); PL_regint_string = MEMBER_TO_FPTR(Perl_re_intuit_string); PL_regfree = MEMBER_TO_FPTR(Perl_pregfree); PL_regindent = 0; PL_reginterp_cnt = 0; return thr; } #endif /* USE_5005THREADS */ void Perl_call_list(pTHX_ I32 oldscope, AV *paramList) { dVAR; SV *atsv; const line_t oldline = CopLINE(PL_curcop); CV *cv; STRLEN len; int ret; dJMPENV; while (av_len(paramList) >= 0) { cv = (CV*)av_shift(paramList); if (PL_savebegin) { if (paramList == PL_beginav) { /* save PL_beginav for compiler */ if (! PL_beginav_save) PL_beginav_save = newAV(); av_push(PL_beginav_save, (SV*)cv); } else if (paramList == PL_checkav) { /* save PL_checkav for compiler */ if (! PL_checkav_save) PL_checkav_save = newAV(); av_push(PL_checkav_save, (SV*)cv); } } else { SAVEFREESV(cv); } JMPENV_PUSH(ret); switch (ret) { case 0: call_list_body(cv); atsv = ERRSV; (void)SvPV_const(atsv, len); if (len) { PL_curcop = &PL_compiling; CopLINE_set(PL_curcop, oldline); if (paramList == PL_beginav) sv_catpv(atsv, "BEGIN failed--compilation aborted"); else Perl_sv_catpvf(aTHX_ atsv, "%s failed--call queue aborted", paramList == PL_checkav ? "CHECK" : paramList == PL_initav ? "INIT" : "END"); while (PL_scopestack_ix > oldscope) LEAVE; JMPENV_POP; Perl_croak(aTHX_ "%"SVf"", atsv); } break; case 1: STATUS_ALL_FAILURE; /* FALL THROUGH */ case 2: /* my_exit() was called */ while (PL_scopestack_ix > oldscope) LEAVE; FREETMPS; PL_curstash = PL_defstash; PL_curcop = &PL_compiling; CopLINE_set(PL_curcop, oldline); JMPENV_POP; if (PL_statusvalue && !(PL_exit_flags & PERL_EXIT_EXPECTED)) { if (paramList == PL_beginav) Perl_croak(aTHX_ "BEGIN failed--compilation aborted"); else Perl_croak(aTHX_ "%s failed--call queue aborted", paramList == PL_checkav ? "CHECK" : paramList == PL_initav ? "INIT" : "END"); } my_exit_jump(); /* NOTREACHED */ case 3: if (PL_restartop) { PL_curcop = &PL_compiling; CopLINE_set(PL_curcop, oldline); JMPENV_JUMP(3); } PerlIO_printf(Perl_error_log, "panic: restartop\n"); FREETMPS; break; } JMPENV_POP; } } STATIC void * S_call_list_body(pTHX_ CV *cv) { PUSHMARK(PL_stack_sp); call_sv((SV*)cv, G_EVAL|G_DISCARD); return NULL; } void Perl_my_exit(pTHX_ U32 status) { DEBUG_S(PerlIO_printf(Perl_debug_log, "my_exit: thread %p, status %lu\n", thr, (unsigned long) status)); switch (status) { case 0: STATUS_ALL_SUCCESS; break; case 1: STATUS_ALL_FAILURE; break; default: STATUS_EXIT_SET(status); break; } my_exit_jump(); } void Perl_my_failure_exit(pTHX) { #ifdef VMS /* We have been called to fall on our sword. The desired exit code * should be already set in STATUS_UNIX, but could be shifted over * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a * that code is set. * * If an error code has not been set, then force the issue. */ if (MY_POSIX_EXIT) { /* In POSIX_EXIT mode follow Perl documentations and use 255 for * the exit code when there isn't an error. */ if (STATUS_UNIX == 0) STATUS_UNIX_EXIT_SET(255); else { STATUS_UNIX_EXIT_SET(STATUS_UNIX); /* The exit code could have been set by $? or vmsish which * means that it may not be fatal. So convert * success/warning codes to fatal. */ if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) STATUS_UNIX_EXIT_SET(255); } } else { /* Traditionally Perl on VMS always expects a Fatal Error. */ if (vaxc$errno & 1) { /* So force success status to failure */ if (STATUS_NATIVE & 1) STATUS_ALL_FAILURE; } else { if (!vaxc$errno) { STATUS_UNIX = EINTR; /* In case something cares */ STATUS_ALL_FAILURE; } else { int severity; STATUS_NATIVE = vaxc$errno; /* Should already be this */ /* Encode the severity code */ severity = STATUS_NATIVE & STS$M_SEVERITY; STATUS_UNIX = (severity ? severity : 1) << 8; /* Perl expects this to be a fatal error */ if (severity != STS$K_SEVERE) STATUS_ALL_FAILURE; } } } #else int exitstatus; if (errno & 255) STATUS_UNIX_SET(errno); else { exitstatus = STATUS_UNIX >> 8; if (exitstatus & 255) STATUS_UNIX_SET(exitstatus); else STATUS_UNIX_SET(255); } #endif my_exit_jump(); } STATIC void S_my_exit_jump(pTHX) { dVAR; register PERL_CONTEXT *cx; I32 gimme; SV **newsp; if (PL_e_script) { SvREFCNT_dec(PL_e_script); PL_e_script = Nullsv; } POPSTACK_TO(PL_mainstack); if (cxstack_ix >= 0) { if (cxstack_ix > 0) dounwind(0); POPBLOCK(cx,PL_curpm); LEAVE; } JMPENV_JUMP(2); PERL_UNUSED_VAR(gimme); PERL_UNUSED_VAR(newsp); } static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen) { const char * const p = SvPVX_const(PL_e_script); const char *nl = strchr(p, '\n'); PERL_UNUSED_ARG(idx); PERL_UNUSED_ARG(maxlen); nl = (nl) ? nl+1 : SvEND(PL_e_script); if (nl-p == 0) { filter_del(read_e_script); return 0; } sv_catpvn(buf_sv, p, nl-p); sv_chop(PL_e_script, nl); return 1; } /* * Local variables: * c-indentation-style: bsd * c-basic-offset: 4 * indent-tabs-mode: t * End: * * ex: set ts=8 sts=4 sw=4 noet: */