/* doio.c * * Copyright (c) 1991-2001, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ /* * "Far below them they saw the white waters pour into a foaming bowl, and * then swirl darkly about a deep oval basin in the rocks, until they found * their way out again through a narrow gate, and flowed away, fuming and * chattering, into calmer and more level reaches." */ #include "EXTERN.h" #define PERL_IN_DOIO_C #include "perl.h" #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) #ifndef HAS_SEM #include #endif #ifdef HAS_MSG #include #endif #ifdef HAS_SHM #include # ifndef HAS_SHMAT_PROTOTYPE extern Shmat_t shmat (int, char *, int); # endif #endif #endif #ifdef I_UTIME # if defined(_MSC_VER) || defined(__MINGW32__) # include # else # include # endif #endif #ifdef O_EXCL # define OPEN_EXCL O_EXCL #else # define OPEN_EXCL 0 #endif #if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX) #include #endif bool Perl_do_open(pTHX_ GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp) { return do_openn(gv, name, len, as_raw, rawmode, rawperm, supplied_fp, (SV **) NULL, 0); } bool Perl_do_open9(pTHX_ GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp, SV *svs, I32 num_svs) { return do_openn(gv, name, len, as_raw, rawmode, rawperm, supplied_fp, &svs, 1); } bool Perl_do_openn(pTHX_ GV *gv, register char *name, I32 len, int as_raw, int rawmode, int rawperm, PerlIO *supplied_fp, SV **svp, I32 num_svs) { register IO *io = GvIOn(gv); PerlIO *saveifp = Nullfp; PerlIO *saveofp = Nullfp; int savefd = -1; char savetype = IoTYPE_CLOSED; int writing = 0; PerlIO *fp; int fd; int result; bool was_fdopen = FALSE; bool in_raw = 0, in_crlf = 0, out_raw = 0, out_crlf = 0; char *type = NULL; char mode[8]; /* stdio file mode ("r\0", "rb\0", "r+b\0" etc.) */ SV *namesv; Zero(mode,sizeof(mode),char); PL_forkprocess = 1; /* assume true if no fork */ /* Collect default raw/crlf info from the op */ if (PL_op && PL_op->op_type == OP_OPEN) { /* set up disciplines */ U8 flags = PL_op->op_private; in_raw = (flags & OPpOPEN_IN_RAW); in_crlf = (flags & OPpOPEN_IN_CRLF); out_raw = (flags & OPpOPEN_OUT_RAW); out_crlf = (flags & OPpOPEN_OUT_CRLF); } /* If currently open - close before we re-open */ if (IoIFP(io)) { fd = PerlIO_fileno(IoIFP(io)); if (IoTYPE(io) == IoTYPE_STD) { /* This is a clone of one of STD* handles */ result = 0; } else if (fd >= 0 && fd <= PL_maxsysfd) { /* This is one of the original STD* handles */ saveifp = IoIFP(io); saveofp = IoOFP(io); savetype = IoTYPE(io); savefd = fd; result = 0; } else if (IoTYPE(io) == IoTYPE_PIPE) result = PerlProc_pclose(IoIFP(io)); else if (IoIFP(io) != IoOFP(io)) { if (IoOFP(io)) { result = PerlIO_close(IoOFP(io)); PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ } else result = PerlIO_close(IoIFP(io)); } else result = PerlIO_close(IoIFP(io)); if (result == EOF && fd > PL_maxsysfd) { /* Why is this not Perl_warn*() call ? */ PerlIO_printf(Perl_error_log, "Warning: unable to close filehandle %s properly.\n", GvENAME(gv)); } IoOFP(io) = IoIFP(io) = Nullfp; } if (as_raw) { /* sysopen style args, i.e. integer mode and permissions */ STRLEN ix = 0; if (num_svs != 0) { Perl_croak(aTHX_ "panic:sysopen with multiple args"); } mode[ix++] = '#'; /* Marker to openn to use numeric "sysopen" */ #if defined(USE_64_BIT_RAWIO) && defined(O_LARGEFILE) rawmode |= O_LARGEFILE; #endif #ifndef O_ACCMODE #define O_ACCMODE 3 /* Assume traditional implementation */ #endif switch (result = rawmode & O_ACCMODE) { case O_RDONLY: IoTYPE(io) = IoTYPE_RDONLY; break; case O_WRONLY: IoTYPE(io) = IoTYPE_WRONLY; break; case O_RDWR: default: IoTYPE(io) = IoTYPE_RDWR; break; } writing = (result > 0); if (result == O_RDONLY) { mode[ix++] = 'r'; } #ifdef O_APPEND else if (rawmode & O_APPEND) { mode[ix++] = 'a'; if (result != O_WRONLY) mode[ix++] = '+'; } #endif else { if (result == O_WRONLY) mode[ix++] = 'w'; else { mode[ix++] = 'r'; mode[ix++] = '+'; } } if (rawmode & O_BINARY) mode[ix++] = 'b'; mode[ix] = '\0'; namesv = sv_2mortal(newSVpvn(name,strlen(name))); num_svs = 1; svp = &namesv; type = Nullch; fp = PerlIO_openn(aTHX_ type,mode, -1, rawmode, rawperm, NULL, num_svs, svp); } else { /* Regular (non-sys) open */ char *oname = name; STRLEN olen = len; char *tend; int dodup = 0; type = savepvn(name, len); tend = type+len; SAVEFREEPV(type); /* Loose trailing white space */ while (tend > type && isSPACE(tend[-1])) *tend-- = '\0'; if (num_svs) { /* New style explict name, type is just mode and discipline/layer info */ STRLEN l = 0; name = SvOK(*svp) ? SvPV(*svp, l) : ""; len = (I32)l; name = savepvn(name, len); SAVEFREEPV(name); /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; } else { name = type; len = tend-type; } IoTYPE(io) = *type; if ((*type == IoTYPE_RDWR) && ((!num_svs || tend > type+1 && tend[-1] != IoTYPE_PIPE))) { /* scary */ mode[1] = *type++; writing = 1; } if (*type == IoTYPE_PIPE) { if (num_svs) { if (type[1] != IoTYPE_STD) { unknown_desr: Perl_croak(aTHX_ "Unknown open() mode '%.*s'", (int)olen, oname); } type++; } /*SUPPRESS 530*/ for (type++; isSPACE(*type); type++) ; if (!num_svs) { name = type; len = tend-type; } if (*name == '\0') { /* command is missing 19990114 */ if (ckWARN(WARN_PIPE)) Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open"); errno = EPIPE; goto say_false; } if (strNE(name,"-") || num_svs) TAINT_ENV(); TAINT_PROPER("piped open"); if (!num_svs && name[len-1] == '|') { name[--len] = '\0' ; if (ckWARN(WARN_PIPE)) Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe"); } mode[0] = 'w'; writing = 1; if (out_raw) strcat(mode, "b"); else if (out_crlf) strcat(mode, "t"); if (num_svs > 1) { fp = PerlProc_popen_list(mode, num_svs, svp); } else { fp = PerlProc_popen(name,mode); } } else if (*type == IoTYPE_WRONLY) { TAINT_PROPER("open"); type++; if (*type == IoTYPE_WRONLY) { /* Two IoTYPE_WRONLYs in a row make for an IoTYPE_APPEND. */ mode[0] = IoTYPE(io) = IoTYPE_APPEND; type++; } else { mode[0] = 'w'; } writing = 1; if (out_raw) strcat(mode, "b"); else if (out_crlf) strcat(mode, "t"); if (*type == '&') { duplicity: dodup = 1; type++; if (*type == '=') { dodup = 0; type++; } if (!num_svs && !*type && supplied_fp) { /* "<+&" etc. is used by typemaps */ fp = supplied_fp; } else { if (num_svs > 1) { Perl_croak(aTHX_ "More than one argument to '%c&' open",IoTYPE(io)); } if (num_svs && SvIOK(*svp)) { fd = SvUV(*svp); } else if (isDIGIT(*type)) { /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; fd = atoi(type); } else { IO* thatio; if (num_svs) { thatio = sv_2io(*svp); } else { GV *thatgv; /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; thatgv = gv_fetchpv(type,FALSE,SVt_PVIO); thatio = GvIO(thatgv); } if (!thatio) { #ifdef EINVAL SETERRNO(EINVAL,SS$_IVCHAN); #endif goto say_false; } if (IoIFP(thatio)) { PerlIO *fp = IoIFP(thatio); /* Flush stdio buffer before dup. --mjd * Unfortunately SEEK_CURing 0 seems to * be optimized away on most platforms; * only Solaris and Linux seem to flush * on that. --jhi */ #ifdef USE_SFIO /* sfio fails to clear error on next sfwrite, contrary to documentation. -- Nick Clark */ if (PerlIO_seek(fp, 0, SEEK_CUR) == -1) PerlIO_clearerr(fp); #endif /* On the other hand, do all platforms * take gracefully to flushing a read-only * filehandle? Perhaps we should do * fsetpos(src)+fgetpos(dst)? --nik */ PerlIO_flush(fp); fd = PerlIO_fileno(fp); /* When dup()ing STDIN, STDOUT or STDERR * explicitly set appropriate access mode */ if (IoIFP(thatio) == PerlIO_stdout() || IoIFP(thatio) == PerlIO_stderr()) IoTYPE(io) = IoTYPE_WRONLY; else if (IoIFP(thatio) == PerlIO_stdin()) IoTYPE(io) = IoTYPE_RDONLY; /* When dup()ing a socket, say result is * one as well */ else if (IoTYPE(thatio) == IoTYPE_SOCKET) IoTYPE(io) = IoTYPE_SOCKET; } else fd = -1; } if (dodup) fd = PerlLIO_dup(fd); else was_fdopen = TRUE; if (!num_svs) type = Nullch; if (!(fp = PerlIO_openn(aTHX_ type,mode,fd,0,0,NULL,num_svs,svp))) { if (dodup) PerlLIO_close(fd); } } } /* & */ else { if (num_svs > 1) { Perl_croak(aTHX_ "More than one argument to '>' open"); } /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { /*SUPPRESS 530*/ type++; fp = PerlIO_stdout(); IoTYPE(io) = IoTYPE_STD; } else { if (!num_svs) { namesv = sv_2mortal(newSVpvn(type,strlen(type))); num_svs = 1; svp = &namesv; type = Nullch; } fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); } } /* !& */ } else if (*type == IoTYPE_RDONLY) { if (num_svs > 1) { Perl_croak(aTHX_ "More than one argument to '<' open"); } /*SUPPRESS 530*/ for (type++; isSPACE(*type); type++) ; mode[0] = 'r'; if (in_raw) strcat(mode, "b"); else if (in_crlf) strcat(mode, "t"); if (*type == '&') { goto duplicity; } if (*type == IoTYPE_STD && (!type[1] || isSPACE(type[1]) || type[1] == ':')) { /*SUPPRESS 530*/ type++; fp = PerlIO_stdin(); IoTYPE(io) = IoTYPE_STD; } else { if (!num_svs) { namesv = sv_2mortal(newSVpvn(type,strlen(type))); num_svs = 1; svp = &namesv; type = Nullch; } fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); } } else if ((num_svs && type[0] == IoTYPE_STD && type[1] == IoTYPE_PIPE) || (!num_svs && tend > type+1 && tend[-1] == IoTYPE_PIPE)) { if (num_svs) { type += 2; /* skip over '-|' */ } else { *--tend = '\0'; while (tend > type && isSPACE(tend[-1])) *--tend = '\0'; /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; name = type; len = tend-type; } if (*name == '\0') { /* command is missing 19990114 */ if (ckWARN(WARN_PIPE)) Perl_warner(aTHX_ WARN_PIPE, "Missing command in piped open"); errno = EPIPE; goto say_false; } if (strNE(name,"-") || num_svs) TAINT_ENV(); TAINT_PROPER("piped open"); mode[0] = 'r'; if (in_raw) strcat(mode, "b"); else if (in_crlf) strcat(mode, "t"); if (num_svs > 1) { fp = PerlProc_popen_list(mode,num_svs,svp); } else { fp = PerlProc_popen(name,mode); } IoTYPE(io) = IoTYPE_PIPE; } else { if (num_svs) goto unknown_desr; name = type; IoTYPE(io) = IoTYPE_RDONLY; /*SUPPRESS 530*/ for (; isSPACE(*name); name++) ; mode[0] = 'r'; if (in_raw) strcat(mode, "b"); else if (in_crlf) strcat(mode, "t"); if (strEQ(name,"-")) { fp = PerlIO_stdin(); IoTYPE(io) = IoTYPE_STD; } else { if (!num_svs) { namesv = sv_2mortal(newSVpvn(type,strlen(type))); num_svs = 1; svp = &namesv; type = Nullch; } fp = PerlIO_openn(aTHX_ type,mode,-1,0,0,NULL,num_svs,svp); } } } if (!fp) { if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == IoTYPE_RDONLY && strchr(name, '\n')) Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open"); goto say_false; } if (ckWARN(WARN_IO)) { if ((IoTYPE(io) == IoTYPE_RDONLY) && (fp == PerlIO_stdout() || fp == PerlIO_stderr())) { Perl_warner(aTHX_ WARN_IO, "'std%s' opened only for input", (fp == PerlIO_stdout()) ? "out" : "err"); } else if ((IoTYPE(io) == IoTYPE_WRONLY) && fp == PerlIO_stdin()) { Perl_warner(aTHX_ WARN_IO, "'stdin' opened only for output"); } } if (IoTYPE(io) && IoTYPE(io) != IoTYPE_PIPE && IoTYPE(io) != IoTYPE_STD && /* FIXME: This next term is a hack to avoid fileno on PerlIO::Scalar */ !(num_svs && SvROK(*svp))) { if (PerlLIO_fstat(PerlIO_fileno(fp),&PL_statbuf) < 0) { (void)PerlIO_close(fp); goto say_false; } if (S_ISSOCK(PL_statbuf.st_mode)) IoTYPE(io) = IoTYPE_SOCKET; /* in case a socket was passed in to us */ #ifdef HAS_SOCKET else if ( #ifdef S_IFMT !(PL_statbuf.st_mode & S_IFMT) #else !PL_statbuf.st_mode #endif && IoTYPE(io) != IoTYPE_WRONLY /* Dups of STD* filehandles already have */ && IoTYPE(io) != IoTYPE_RDONLY /* type so they aren't marked as sockets */ ) { /* on OS's that return 0 on fstat()ed pipe */ char tmpbuf[256]; Sock_size_t buflen = sizeof tmpbuf; if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf, &buflen) >= 0 || errno != ENOTSOCK) IoTYPE(io) = IoTYPE_SOCKET; /* some OS's return 0 on fstat()ed socket */ /* but some return 0 for streams too, sigh */ } #endif } if (saveifp) { /* must use old fp? */ /* If fd is less that PL_maxsysfd i.e. STDIN..STDERR then dup the new fileno down */ fd = PerlIO_fileno(fp); if (saveofp) { PerlIO_flush(saveofp); /* emulate PerlIO_close() */ if (saveofp != saveifp) { /* was a socket? */ PerlIO_close(saveofp); } } if (savefd != fd) { Pid_t pid; SV *sv; PerlLIO_dup2(fd, savefd); #ifdef VMS if (savefd != PerlIO_fileno(PerlIO_stdin())) { char newname[FILENAME_MAX+1]; if (fgetname(fp, newname)) { if (savefd == PerlIO_fileno(PerlIO_stdout())) Perl_vmssetuserlnm("SYS$OUTPUT", newname); if (savefd == PerlIO_fileno(PerlIO_stderr())) Perl_vmssetuserlnm("SYS$ERROR", newname); } } #endif LOCK_FDPID_MUTEX; sv = *av_fetch(PL_fdpid,fd,TRUE); (void)SvUPGRADE(sv, SVt_IV); pid = SvIVX(sv); SvIVX(sv) = 0; sv = *av_fetch(PL_fdpid,savefd,TRUE); UNLOCK_FDPID_MUTEX; (void)SvUPGRADE(sv, SVt_IV); SvIVX(sv) = pid; if (!was_fdopen) PerlIO_close(fp); } fp = saveifp; PerlIO_clearerr(fp); } #if defined(HAS_FCNTL) && defined(F_SETFD) { int save_errno = errno; fd = PerlIO_fileno(fp); fcntl(fd,F_SETFD,fd > PL_maxsysfd); /* can change errno */ errno = save_errno; } #endif IoIFP(io) = fp; IoFLAGS(io) &= ~IOf_NOLINE; if (writing) { if (IoTYPE(io) == IoTYPE_SOCKET || (IoTYPE(io) == IoTYPE_WRONLY && S_ISCHR(PL_statbuf.st_mode)) ) { mode[0] = 'w'; if (!(IoOFP(io) = PerlIO_openn(aTHX_ type,mode,PerlIO_fileno(fp),0,0,NULL,num_svs,svp))) { PerlIO_close(fp); IoIFP(io) = Nullfp; goto say_false; } } else IoOFP(io) = fp; } return TRUE; say_false: IoIFP(io) = saveifp; IoOFP(io) = saveofp; IoTYPE(io) = savetype; return FALSE; } PerlIO * Perl_nextargv(pTHX_ register GV *gv) { register SV *sv; #ifndef FLEXFILENAMES int filedev; int fileino; #endif Uid_t fileuid; Gid_t filegid; IO *io = GvIOp(gv); if (!PL_argvoutgv) PL_argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO); if (io && (IoFLAGS(io) & IOf_ARGV) && (IoFLAGS(io) & IOf_START)) { IoFLAGS(io) &= ~IOf_START; if (PL_inplace) { if (!PL_argvout_stack) PL_argvout_stack = newAV(); av_push(PL_argvout_stack, SvREFCNT_inc(PL_defoutgv)); } } if (PL_filemode & (S_ISUID|S_ISGID)) { PerlIO_flush(IoIFP(GvIOn(PL_argvoutgv))); /* chmod must follow last write */ #ifdef HAS_FCHMOD (void)fchmod(PL_lastfd,PL_filemode); #else (void)PerlLIO_chmod(PL_oldname,PL_filemode); #endif } PL_filemode = 0; while (av_len(GvAV(gv)) >= 0) { STRLEN oldlen; sv = av_shift(GvAV(gv)); SAVEFREESV(sv); sv_setsv(GvSV(gv),sv); SvSETMAGIC(GvSV(gv)); PL_oldname = SvPVx(GvSV(gv), oldlen); if (do_open(gv,PL_oldname,oldlen,PL_inplace!=0,O_RDONLY,0,Nullfp)) { if (PL_inplace) { TAINT_PROPER("inplace open"); if (oldlen == 1 && *PL_oldname == '-') { setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO)); return IoIFP(GvIOp(gv)); } #ifndef FLEXFILENAMES filedev = PL_statbuf.st_dev; fileino = PL_statbuf.st_ino; #endif PL_filemode = PL_statbuf.st_mode; fileuid = PL_statbuf.st_uid; filegid = PL_statbuf.st_gid; if (!S_ISREG(PL_filemode)) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit: %s is not a regular file", PL_oldname ); do_close(gv,FALSE); continue; } if (*PL_inplace) { char *star = strchr(PL_inplace, '*'); if (star) { char *begin = PL_inplace; sv_setpvn(sv, "", 0); do { sv_catpvn(sv, begin, star - begin); sv_catpvn(sv, PL_oldname, oldlen); begin = ++star; } while ((star = strchr(begin, '*'))); if (*begin) sv_catpv(sv,begin); } else { sv_catpv(sv,PL_inplace); } #ifndef FLEXFILENAMES if (PerlLIO_stat(SvPVX(sv),&PL_statbuf) >= 0 && PL_statbuf.st_dev == filedev && PL_statbuf.st_ino == fileino #ifdef DJGPP || (_djstat_fail_bits & _STFAIL_TRUENAME)!=0 #endif ) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit: %s would not be unique", SvPVX(sv)); do_close(gv,FALSE); continue; } #endif #ifdef HAS_RENAME #if !defined(DOSISH) && !defined(__CYGWIN__) if (PerlLIO_rename(PL_oldname,SvPVX(sv)) < 0) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ WARN_INPLACE, "Can't rename %s to %s: %s, skipping file", PL_oldname, SvPVX(sv), Strerror(errno) ); do_close(gv,FALSE); continue; } #else do_close(gv,FALSE); (void)PerlLIO_unlink(SvPVX(sv)); (void)PerlLIO_rename(PL_oldname,SvPVX(sv)); do_open(gv,SvPVX(sv),SvCUR(sv),PL_inplace!=0,O_RDONLY,0,Nullfp); #endif /* DOSISH */ #else (void)UNLINK(SvPVX(sv)); if (link(PL_oldname,SvPVX(sv)) < 0) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ WARN_INPLACE, "Can't rename %s to %s: %s, skipping file", PL_oldname, SvPVX(sv), Strerror(errno) ); do_close(gv,FALSE); continue; } (void)UNLINK(PL_oldname); #endif } else { #if !defined(DOSISH) && !defined(AMIGAOS) # ifndef VMS /* Don't delete; use automatic file versioning */ if (UNLINK(PL_oldname) < 0) { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ WARN_INPLACE, "Can't remove %s: %s, skipping file", PL_oldname, Strerror(errno) ); do_close(gv,FALSE); continue; } # endif #else Perl_croak(aTHX_ "Can't do inplace edit without backup"); #endif } sv_setpvn(sv,">",!PL_inplace); sv_catpvn(sv,PL_oldname,oldlen); SETERRNO(0,0); /* in case sprintf set errno */ #ifdef VMS if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0, O_WRONLY|O_CREAT|O_TRUNC,0,Nullfp)) #else if (!do_open(PL_argvoutgv,SvPVX(sv),SvCUR(sv),PL_inplace!=0, O_WRONLY|O_CREAT|OPEN_EXCL,0666,Nullfp)) #endif { if (ckWARN_d(WARN_INPLACE)) Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit on %s: %s", PL_oldname, Strerror(errno) ); do_close(gv,FALSE); continue; } setdefout(PL_argvoutgv); PL_lastfd = PerlIO_fileno(IoIFP(GvIOp(PL_argvoutgv))); (void)PerlLIO_fstat(PL_lastfd,&PL_statbuf); #ifdef HAS_FCHMOD (void)fchmod(PL_lastfd,PL_filemode); #else # if !(defined(WIN32) && defined(__BORLANDC__)) /* Borland runtime creates a readonly file! */ (void)PerlLIO_chmod(PL_oldname,PL_filemode); # endif #endif if (fileuid != PL_statbuf.st_uid || filegid != PL_statbuf.st_gid) { #ifdef HAS_FCHOWN (void)fchown(PL_lastfd,fileuid,filegid); #else #ifdef HAS_CHOWN (void)PerlLIO_chown(PL_oldname,fileuid,filegid); #endif #endif } } return IoIFP(GvIOp(gv)); } else { if (ckWARN_d(WARN_INPLACE)) { int eno = errno; if (PerlLIO_stat(PL_oldname, &PL_statbuf) >= 0 && !S_ISREG(PL_statbuf.st_mode)) { Perl_warner(aTHX_ WARN_INPLACE, "Can't do inplace edit: %s is not a regular file", PL_oldname); } else Perl_warner(aTHX_ WARN_INPLACE, "Can't open %s: %s", PL_oldname, Strerror(eno)); } } } if (io && (IoFLAGS(io) & IOf_ARGV)) IoFLAGS(io) |= IOf_START; if (PL_inplace) { (void)do_close(PL_argvoutgv,FALSE); if (io && (IoFLAGS(io) & IOf_ARGV) && PL_argvout_stack && AvFILLp(PL_argvout_stack) >= 0) { GV *oldout = (GV*)av_pop(PL_argvout_stack); setdefout(oldout); SvREFCNT_dec(oldout); return Nullfp; } setdefout(gv_fetchpv("STDOUT",TRUE,SVt_PVIO)); } return Nullfp; } #ifdef HAS_PIPE void Perl_do_pipe(pTHX_ SV *sv, GV *rgv, GV *wgv) { register IO *rstio; register IO *wstio; int fd[2]; if (!rgv) goto badexit; if (!wgv) goto badexit; rstio = GvIOn(rgv); wstio = GvIOn(wgv); if (IoIFP(rstio)) do_close(rgv,FALSE); if (IoIFP(wstio)) do_close(wgv,FALSE); if (PerlProc_pipe(fd) < 0) goto badexit; IoIFP(rstio) = PerlIO_fdopen(fd[0], "r"); IoOFP(wstio) = PerlIO_fdopen(fd[1], "w"); IoIFP(wstio) = IoOFP(wstio); IoTYPE(rstio) = IoTYPE_RDONLY; IoTYPE(wstio) = IoTYPE_WRONLY; if (!IoIFP(rstio) || !IoOFP(wstio)) { if (IoIFP(rstio)) PerlIO_close(IoIFP(rstio)); else PerlLIO_close(fd[0]); if (IoOFP(wstio)) PerlIO_close(IoOFP(wstio)); else PerlLIO_close(fd[1]); goto badexit; } sv_setsv(sv,&PL_sv_yes); return; badexit: sv_setsv(sv,&PL_sv_undef); return; } #endif /* explicit renamed to avoid C++ conflict -- kja */ bool Perl_do_close(pTHX_ GV *gv, bool not_implicit) { bool retval; IO *io; if (!gv) gv = PL_argvgv; if (!gv || SvTYPE(gv) != SVt_PVGV) { if (not_implicit) SETERRNO(EBADF,SS$_IVCHAN); return FALSE; } io = GvIO(gv); if (!io) { /* never opened */ if (not_implicit) { if (ckWARN(WARN_UNOPENED)) /* no check for closed here */ report_evil_fh(gv, io, PL_op->op_type); SETERRNO(EBADF,SS$_IVCHAN); } return FALSE; } retval = io_close(io, not_implicit); if (not_implicit) { IoLINES(io) = 0; IoPAGE(io) = 0; IoLINES_LEFT(io) = IoPAGE_LEN(io); } IoTYPE(io) = IoTYPE_CLOSED; return retval; } bool Perl_io_close(pTHX_ IO *io, bool not_implicit) { bool retval = FALSE; int status; if (IoIFP(io)) { if (IoTYPE(io) == IoTYPE_PIPE) { status = PerlProc_pclose(IoIFP(io)); if (not_implicit) { STATUS_NATIVE_SET(status); retval = (STATUS_POSIX == 0); } else { retval = (status != -1); } } else if (IoTYPE(io) == IoTYPE_STD) retval = TRUE; else { if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */ retval = (PerlIO_close(IoOFP(io)) != EOF); PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ } else retval = (PerlIO_close(IoIFP(io)) != EOF); } IoOFP(io) = IoIFP(io) = Nullfp; } else if (not_implicit) { SETERRNO(EBADF,SS$_IVCHAN); } return retval; } bool Perl_do_eof(pTHX_ GV *gv) { register IO *io; int ch; io = GvIO(gv); if (!io) return TRUE; else if (ckWARN(WARN_IO) && (IoTYPE(io) == IoTYPE_WRONLY)) { /* integrate to report_evil_fh()? */ char *name = NULL; if (isGV(gv)) { SV* sv = sv_newmortal(); gv_efullname4(sv, gv, Nullch, FALSE); name = SvPV_nolen(sv); } if (name && *name) Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for output", name); else Perl_warner(aTHX_ WARN_IO, "Filehandle opened only for output"); } while (IoIFP(io)) { if (PerlIO_has_cntptr(IoIFP(io))) { /* (the code works without this) */ if (PerlIO_get_cnt(IoIFP(io)) > 0) /* cheat a little, since */ return FALSE; /* this is the most usual case */ } ch = PerlIO_getc(IoIFP(io)); if (ch != EOF) { (void)PerlIO_ungetc(IoIFP(io),ch); return FALSE; } if (PerlIO_has_cntptr(IoIFP(io)) && PerlIO_canset_cnt(IoIFP(io))) { if (PerlIO_get_cnt(IoIFP(io)) < -1) PerlIO_set_cnt(IoIFP(io),-1); } if (PL_op->op_flags & OPf_SPECIAL) { /* not necessarily a real EOF yet? */ if (!nextargv(PL_argvgv)) /* get another fp handy */ return TRUE; } else return TRUE; /* normal fp, definitely end of file */ } return TRUE; } Off_t Perl_do_tell(pTHX_ GV *gv) { register IO *io; register PerlIO *fp; if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) { #ifdef ULTRIX_STDIO_BOTCH if (PerlIO_eof(fp)) (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */ #endif return PerlIO_tell(fp); } if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) report_evil_fh(gv, io, PL_op->op_type); SETERRNO(EBADF,RMS$_IFI); return (Off_t)-1; } bool Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence) { register IO *io; register PerlIO *fp; if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) { #ifdef ULTRIX_STDIO_BOTCH if (PerlIO_eof(fp)) (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */ #endif return PerlIO_seek(fp, pos, whence) >= 0; } if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) report_evil_fh(gv, io, PL_op->op_type); SETERRNO(EBADF,RMS$_IFI); return FALSE; } Off_t Perl_do_sysseek(pTHX_ GV *gv, Off_t pos, int whence) { register IO *io; register PerlIO *fp; if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) return PerlLIO_lseek(PerlIO_fileno(fp), pos, whence); if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) report_evil_fh(gv, io, PL_op->op_type); SETERRNO(EBADF,RMS$_IFI); return (Off_t)-1; } int Perl_mode_from_discipline(pTHX_ SV *discp) { int mode = O_BINARY; if (discp) { STRLEN len; char *s = SvPV(discp,len); while (*s) { if (*s == ':') { switch (s[1]) { case 'r': if (len > 3 && strnEQ(s+1, "raw", 3) && (!s[4] || s[4] == ':' || isSPACE(s[4]))) { mode = O_BINARY; s += 4; len -= 4; break; } /* FALL THROUGH */ case 'c': if (len > 4 && strnEQ(s+1, "crlf", 4) && (!s[5] || s[5] == ':' || isSPACE(s[5]))) { mode = O_TEXT; s += 5; len -= 5; break; } /* FALL THROUGH */ default: goto fail_discipline; } } else if (isSPACE(*s)) { ++s; --len; } else { char *end; fail_discipline: end = strchr(s+1, ':'); if (!end) end = s+len; #ifndef PERLIO_LAYERS Perl_croak(aTHX_ "Unknown discipline '%.*s'", end-s, s); #else s = end; #endif } } } return mode; } int Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int mode) { /* The old body of this is now in non-LAYER part of perlio.c * This is a stub for any XS code which might have been calling it. */ char *name = (O_BINARY != O_TEXT && !(mode & O_BINARY)) ? ":crlf" : ":raw"; return PerlIO_binmode(aTHX_ fp, iotype, mode, name); } #if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP) /* code courtesy of William Kucharski */ #define HAS_CHSIZE I32 my_chsize(fd, length) I32 fd; /* file descriptor */ Off_t length; /* length to set file to */ { struct flock fl; struct stat filebuf; if (PerlLIO_fstat(fd, &filebuf) < 0) return -1; if (filebuf.st_size < length) { /* extend file length */ if ((PerlLIO_lseek(fd, (length - 1), 0)) < 0) return -1; /* write a "0" byte */ if ((PerlLIO_write(fd, "", 1)) != 1) return -1; } else { /* truncate length */ fl.l_whence = 0; fl.l_len = 0; fl.l_start = length; fl.l_type = F_WRLCK; /* write lock on file space */ /* * This relies on the UNDOCUMENTED F_FREESP argument to * fcntl(2), which truncates the file so that it ends at the * position indicated by fl.l_start. * * Will minor miracles never cease? */ if (fcntl(fd, F_FREESP, &fl) < 0) return -1; } return 0; } #endif /* F_FREESP */ bool Perl_do_print(pTHX_ register SV *sv, PerlIO *fp) { register char *tmps; STRLEN len; /* assuming fp is checked earlier */ if (!sv) return TRUE; if (PL_ofmt) { if (SvGMAGICAL(sv)) mg_get(sv); if (SvIOK(sv) && SvIVX(sv) != 0) { PerlIO_printf(fp, PL_ofmt, (NV)SvIVX(sv)); return !PerlIO_error(fp); } if ( (SvNOK(sv) && SvNVX(sv) != 0.0) || (looks_like_number(sv) && sv_2nv(sv) != 0.0) ) { PerlIO_printf(fp, PL_ofmt, SvNVX(sv)); return !PerlIO_error(fp); } } switch (SvTYPE(sv)) { case SVt_NULL: if (ckWARN(WARN_UNINITIALIZED)) report_uninit(); return TRUE; case SVt_IV: if (SvIOK(sv)) { if (SvGMAGICAL(sv)) mg_get(sv); if (SvIsUV(sv)) PerlIO_printf(fp, "%"UVuf, (UV)SvUVX(sv)); else PerlIO_printf(fp, "%"IVdf, (IV)SvIVX(sv)); return !PerlIO_error(fp); } /* FALL THROUGH */ default: if (PerlIO_isutf8(fp)) { if (!SvUTF8(sv)) sv_utf8_upgrade(sv = sv_mortalcopy(sv)); } else if (DO_UTF8(sv)) { if (!sv_utf8_downgrade((sv = sv_mortalcopy(sv)), TRUE)) { Perl_warner(aTHX_ WARN_UTF8, "Wide character in print"); } } tmps = SvPV(sv, len); break; } /* To detect whether the process is about to overstep its * filesize limit we would need getrlimit(). We could then * also transparently raise the limit with setrlimit() -- * but only until the system hard limit/the filesystem limit, * at which we would get EPERM. Note that when using buffered * io the write failure can be delayed until the flush/close. --jhi */ if (len && (PerlIO_write(fp,tmps,len) == 0)) return FALSE; return !PerlIO_error(fp); } I32 Perl_my_stat(pTHX) { dSP; IO *io; GV* gv; if (PL_op->op_flags & OPf_REF) { EXTEND(SP,1); gv = cGVOP_gv; do_fstat: io = GvIO(gv); if (io && IoIFP(io)) { PL_statgv = gv; sv_setpv(PL_statname,""); PL_laststype = OP_STAT; return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache)); } else { if (gv == PL_defgv) return PL_laststatval; if (ckWARN2(WARN_UNOPENED,WARN_CLOSED)) report_evil_fh(gv, io, PL_op->op_type); PL_statgv = Nullgv; sv_setpv(PL_statname,""); return (PL_laststatval = -1); } } else { SV* sv = POPs; char *s; STRLEN n_a; PUTBACK; if (SvTYPE(sv) == SVt_PVGV) { gv = (GV*)sv; goto do_fstat; } else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) { gv = (GV*)SvRV(sv); goto do_fstat; } s = SvPV(sv, n_a); PL_statgv = Nullgv; sv_setpv(PL_statname, s); PL_laststype = OP_STAT; PL_laststatval = PerlLIO_stat(s, &PL_statcache); if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(s, '\n')) Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "stat"); return PL_laststatval; } } I32 Perl_my_lstat(pTHX) { dSP; SV *sv; STRLEN n_a; if (PL_op->op_flags & OPf_REF) { EXTEND(SP,1); if (cGVOP_gv == PL_defgv) { if (PL_laststype != OP_LSTAT) Perl_croak(aTHX_ "The stat preceding -l _ wasn't an lstat"); return PL_laststatval; } Perl_croak(aTHX_ "You can't use -l on a filehandle"); } PL_laststype = OP_LSTAT; PL_statgv = Nullgv; sv = POPs; PUTBACK; sv_setpv(PL_statname,SvPV(sv, n_a)); PL_laststatval = PerlLIO_lstat(SvPV(sv, n_a),&PL_statcache); if (PL_laststatval < 0 && ckWARN(WARN_NEWLINE) && strchr(SvPV(sv, n_a), '\n')) Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "lstat"); return PL_laststatval; } bool Perl_do_aexec(pTHX_ SV *really, register SV **mark, register SV **sp) { return do_aexec5(really, mark, sp, 0, 0); } bool Perl_do_aexec5(pTHX_ SV *really, register SV **mark, register SV **sp, int fd, int do_report) { #ifdef MACOS_TRADITIONAL Perl_croak(aTHX_ "exec? I'm not *that* kind of operating system"); #else register char **a; char *tmps; STRLEN n_a; if (sp > mark) { New(401,PL_Argv, sp - mark + 1, char*); a = PL_Argv; while (++mark <= sp) { if (*mark) *a++ = SvPVx(*mark, n_a); else *a++ = ""; } *a = Nullch; if (really) tmps = SvPV(really, n_a); if ((!really && *PL_Argv[0] != '/') || (really && *tmps != '/')) /* will execvp use PATH? */ TAINT_ENV(); /* testing IFS here is overkill, probably */ if (really && *tmps) PerlProc_execvp(tmps,EXEC_ARGV_CAST(PL_Argv)); else PerlProc_execvp(PL_Argv[0],EXEC_ARGV_CAST(PL_Argv)); if (ckWARN(WARN_EXEC)) Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s", (really ? tmps : PL_Argv[0]), Strerror(errno)); if (do_report) { int e = errno; PerlLIO_write(fd, (void*)&e, sizeof(int)); PerlLIO_close(fd); } } do_execfree(); #endif return FALSE; } void Perl_do_execfree(pTHX) { if (PL_Argv) { Safefree(PL_Argv); PL_Argv = Null(char **); } if (PL_Cmd) { Safefree(PL_Cmd); PL_Cmd = Nullch; } } #if !defined(OS2) && !defined(WIN32) && !defined(DJGPP) && !defined(EPOC) && !defined(MACOS_TRADITIONAL) bool Perl_do_exec(pTHX_ char *cmd) { return do_exec3(cmd,0,0); } bool Perl_do_exec3(pTHX_ char *cmd, int fd, int do_report) { register char **a; register char *s; char flags[10]; while (*cmd && isSPACE(*cmd)) cmd++; /* save an extra exec if possible */ #ifdef CSH if (strnEQ(cmd,PL_cshname,PL_cshlen) && strnEQ(cmd+PL_cshlen," -c",3)) { strcpy(flags,"-c"); s = cmd+PL_cshlen+3; if (*s == 'f') { s++; strcat(flags,"f"); } if (*s == ' ') s++; if (*s++ == '\'') { char *ncmd = s; while (*s) s++; if (s[-1] == '\n') *--s = '\0'; if (s[-1] == '\'') { *--s = '\0'; PerlProc_execl(PL_cshname,"csh", flags,ncmd,(char*)0); *s = '\''; return FALSE; } } } #endif /* CSH */ /* see if there are shell metacharacters in it */ if (*cmd == '.' && isSPACE(cmd[1])) goto doshell; if (strnEQ(cmd,"exec",4) && isSPACE(cmd[4])) goto doshell; for (s = cmd; *s && isALNUM(*s); s++) ; /* catch VAR=val gizmo */ if (*s == '=') goto doshell; for (s = cmd; *s; s++) { if (*s != ' ' && !isALPHA(*s) && strchr("$&*(){}[]'\";\\|?<>~`\n",*s)) { if (*s == '\n' && !s[1]) { *s = '\0'; break; } /* handle the 2>&1 construct at the end */ if (*s == '>' && s[1] == '&' && s[2] == '1' && s > cmd + 1 && s[-1] == '2' && isSPACE(s[-2]) && (!s[3] || isSPACE(s[3]))) { char *t = s + 3; while (*t && isSPACE(*t)) ++t; if (!*t && (dup2(1,2) != -1)) { s[-2] = '\0'; break; } } doshell: PerlProc_execl(PL_sh_path, "sh", "-c", cmd, (char*)0); return FALSE; } } New(402,PL_Argv, (s - cmd) / 2 + 2, char*); PL_Cmd = savepvn(cmd, s-cmd); a = PL_Argv; for (s = PL_Cmd; *s;) { while (*s && isSPACE(*s)) s++; if (*s) *(a++) = s; while (*s && !isSPACE(*s)) s++; if (*s) *s++ = '\0'; } *a = Nullch; if (PL_Argv[0]) { PerlProc_execvp(PL_Argv[0],PL_Argv); if (errno == ENOEXEC) { /* for system V NIH syndrome */ do_execfree(); goto doshell; } { int e = errno; if (ckWARN(WARN_EXEC)) Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s", PL_Argv[0], Strerror(errno)); if (do_report) { PerlLIO_write(fd, (void*)&e, sizeof(int)); PerlLIO_close(fd); } } } do_execfree(); return FALSE; } #endif /* OS2 || WIN32 */ I32 Perl_apply(pTHX_ I32 type, register SV **mark, register SV **sp) { register I32 val; register I32 val2; register I32 tot = 0; char *what; char *s; SV **oldmark = mark; STRLEN n_a; #define APPLY_TAINT_PROPER() \ STMT_START { \ if (PL_tainted) { TAINT_PROPER(what); } \ } STMT_END /* This is a first heuristic; it doesn't catch tainting magic. */ if (PL_tainting) { while (++mark <= sp) { if (SvTAINTED(*mark)) { TAINT; break; } } mark = oldmark; } switch (type) { case OP_CHMOD: what = "chmod"; APPLY_TAINT_PROPER(); if (++mark <= sp) { val = SvIVx(*mark); APPLY_TAINT_PROPER(); tot = sp - mark; while (++mark <= sp) { char *name = SvPVx(*mark, n_a); APPLY_TAINT_PROPER(); if (PerlLIO_chmod(name, val)) tot--; } } break; #ifdef HAS_CHOWN case OP_CHOWN: what = "chown"; APPLY_TAINT_PROPER(); if (sp - mark > 2) { val = SvIVx(*++mark); val2 = SvIVx(*++mark); APPLY_TAINT_PROPER(); tot = sp - mark; while (++mark <= sp) { char *name = SvPVx(*mark, n_a); APPLY_TAINT_PROPER(); if (PerlLIO_chown(name, val, val2)) tot--; } } break; #endif /* XXX Should we make lchown() directly available from perl? For now, we'll let Configure test for HAS_LCHOWN, but do nothing in the core. --AD 5/1998 */ #ifdef HAS_KILL case OP_KILL: what = "kill"; APPLY_TAINT_PROPER(); if (mark == sp) break; s = SvPVx(*++mark, n_a); if (isUPPER(*s)) { if (*s == 'S' && s[1] == 'I' && s[2] == 'G') s += 3; if (!(val = whichsig(s))) Perl_croak(aTHX_ "Unrecognized signal name \"%s\"",s); } else val = SvIVx(*mark); APPLY_TAINT_PROPER(); tot = sp - mark; #ifdef VMS /* kill() doesn't do process groups (job trees?) under VMS */ if (val < 0) val = -val; if (val == SIGKILL) { # include /* Use native sys$delprc() to insure that target process is * deleted; supervisor-mode images don't pay attention to * CRTL's emulation of Unix-style signals and kill() */ while (++mark <= sp) { I32 proc = SvIVx(*mark); register unsigned long int __vmssts; APPLY_TAINT_PROPER(); if (!((__vmssts = sys$delprc(&proc,0)) & 1)) { tot--; switch (__vmssts) { case SS$_NONEXPR: case SS$_NOSUCHNODE: SETERRNO(ESRCH,__vmssts); break; case SS$_NOPRIV: SETERRNO(EPERM,__vmssts); break; default: SETERRNO(EVMSERR,__vmssts); } } } break; } #endif if (val < 0) { val = -val; while (++mark <= sp) { I32 proc = SvIVx(*mark); APPLY_TAINT_PROPER(); #ifdef HAS_KILLPG if (PerlProc_killpg(proc,val)) /* BSD */ #else if (PerlProc_kill(-proc,val)) /* SYSV */ #endif tot--; } } else { while (++mark <= sp) { I32 proc = SvIVx(*mark); APPLY_TAINT_PROPER(); if (PerlProc_kill(proc, val)) tot--; } } break; #endif case OP_UNLINK: what = "unlink"; APPLY_TAINT_PROPER(); tot = sp - mark; while (++mark <= sp) { s = SvPVx(*mark, n_a); APPLY_TAINT_PROPER(); if (PL_euid || PL_unsafe) { if (UNLINK(s)) tot--; } else { /* don't let root wipe out directories without -U */ if (PerlLIO_lstat(s,&PL_statbuf) < 0 || S_ISDIR(PL_statbuf.st_mode)) tot--; else { if (UNLINK(s)) tot--; } } } break; #ifdef HAS_UTIME case OP_UTIME: what = "utime"; APPLY_TAINT_PROPER(); if (sp - mark > 2) { #if defined(I_UTIME) || defined(VMS) struct utimbuf utbuf; #else struct { Time_t actime; Time_t modtime; } utbuf; #endif Zero(&utbuf, sizeof utbuf, char); #ifdef BIG_TIME utbuf.actime = (Time_t)SvNVx(*++mark); /* time accessed */ utbuf.modtime = (Time_t)SvNVx(*++mark); /* time modified */ #else utbuf.actime = (Time_t)SvIVx(*++mark); /* time accessed */ utbuf.modtime = (Time_t)SvIVx(*++mark); /* time modified */ #endif APPLY_TAINT_PROPER(); tot = sp - mark; while (++mark <= sp) { char *name = SvPVx(*mark, n_a); APPLY_TAINT_PROPER(); if (PerlLIO_utime(name, &utbuf)) tot--; } } else tot = 0; break; #endif } return tot; #undef APPLY_TAINT_PROPER } /* Do the permissions allow some operation? Assumes statcache already set. */ #ifndef VMS /* VMS' cando is in vms.c */ bool Perl_cando(pTHX_ Mode_t mode, Uid_t effective, register Stat_t *statbufp) /* Note: we use `effective' both for uids and gids. * Here we are betting on Uid_t being equal or wider than Gid_t. */ { #ifdef DOSISH /* [Comments and code from Len Reed] * MS-DOS "user" is similar to UNIX's "superuser," but can't write * to write-protected files. The execute permission bit is set * by the Miscrosoft C library stat() function for the following: * .exe files * .com files * .bat files * directories * All files and directories are readable. * Directories and special files, e.g. "CON", cannot be * write-protected. * [Comment by Tom Dinger -- a directory can have the write-protect * bit set in the file system, but DOS permits changes to * the directory anyway. In addition, all bets are off * here for networked software, such as Novell and * Sun's PC-NFS.] */ /* Atari stat() does pretty much the same thing. we set x_bit_set_in_stat * too so it will actually look into the files for magic numbers */ return (mode & statbufp->st_mode) ? TRUE : FALSE; #else /* ! DOSISH */ if ((effective ? PL_euid : PL_uid) == 0) { /* root is special */ if (mode == S_IXUSR) { if (statbufp->st_mode & 0111 || S_ISDIR(statbufp->st_mode)) return TRUE; } else return TRUE; /* root reads and writes anything */ return FALSE; } if (statbufp->st_uid == (effective ? PL_euid : PL_uid) ) { if (statbufp->st_mode & mode) return TRUE; /* ok as "user" */ } else if (ingroup(statbufp->st_gid,effective)) { if (statbufp->st_mode & mode >> 3) return TRUE; /* ok as "group" */ } else if (statbufp->st_mode & mode >> 6) return TRUE; /* ok as "other" */ return FALSE; #endif /* ! DOSISH */ } #endif /* ! VMS */ bool Perl_ingroup(pTHX_ Gid_t testgid, Uid_t effective) { #ifdef MACOS_TRADITIONAL /* This is simply not correct for AppleShare, but fix it yerself. */ return TRUE; #else if (testgid == (effective ? PL_egid : PL_gid)) return TRUE; #ifdef HAS_GETGROUPS #ifndef NGROUPS #define NGROUPS 32 #endif { Groups_t gary[NGROUPS]; I32 anum; anum = getgroups(NGROUPS,gary); while (--anum >= 0) if (gary[anum] == testgid) return TRUE; } #endif return FALSE; #endif } #if defined(HAS_MSG) || defined(HAS_SEM) || defined(HAS_SHM) I32 Perl_do_ipcget(pTHX_ I32 optype, SV **mark, SV **sp) { key_t key; I32 n, flags; key = (key_t)SvNVx(*++mark); n = (optype == OP_MSGGET) ? 0 : SvIVx(*++mark); flags = SvIVx(*++mark); SETERRNO(0,0); switch (optype) { #ifdef HAS_MSG case OP_MSGGET: return msgget(key, flags); #endif #ifdef HAS_SEM case OP_SEMGET: return semget(key, n, flags); #endif #ifdef HAS_SHM case OP_SHMGET: return shmget(key, n, flags); #endif #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) default: Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); #endif } return -1; /* should never happen */ } I32 Perl_do_ipcctl(pTHX_ I32 optype, SV **mark, SV **sp) { SV *astr; char *a; I32 id, n, cmd, infosize, getinfo; I32 ret = -1; id = SvIVx(*++mark); n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0; cmd = SvIVx(*++mark); astr = *++mark; infosize = 0; getinfo = (cmd == IPC_STAT); switch (optype) { #ifdef HAS_MSG case OP_MSGCTL: if (cmd == IPC_STAT || cmd == IPC_SET) infosize = sizeof(struct msqid_ds); break; #endif #ifdef HAS_SHM case OP_SHMCTL: if (cmd == IPC_STAT || cmd == IPC_SET) infosize = sizeof(struct shmid_ds); break; #endif #ifdef HAS_SEM case OP_SEMCTL: #ifdef Semctl if (cmd == IPC_STAT || cmd == IPC_SET) infosize = sizeof(struct semid_ds); else if (cmd == GETALL || cmd == SETALL) { struct semid_ds semds; union semun semun; #ifdef EXTRA_F_IN_SEMUN_BUF semun.buff = &semds; #else semun.buf = &semds; #endif getinfo = (cmd == GETALL); if (Semctl(id, 0, IPC_STAT, semun) == -1) return -1; infosize = semds.sem_nsems * sizeof(short); /* "short" is technically wrong but much more portable than guessing about u_?short(_t)? */ } #else Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); #endif break; #endif #if !defined(HAS_MSG) || !defined(HAS_SEM) || !defined(HAS_SHM) default: Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); #endif } if (infosize) { STRLEN len; if (getinfo) { SvPV_force(astr, len); a = SvGROW(astr, infosize+1); } else { a = SvPV(astr, len); if (len != infosize) Perl_croak(aTHX_ "Bad arg length for %s, is %lu, should be %ld", PL_op_desc[optype], (unsigned long)len, (long)infosize); } } else { IV i = SvIV(astr); a = INT2PTR(char *,i); /* ouch */ } SETERRNO(0,0); switch (optype) { #ifdef HAS_MSG case OP_MSGCTL: ret = msgctl(id, cmd, (struct msqid_ds *)a); break; #endif #ifdef HAS_SEM case OP_SEMCTL: { #ifdef Semctl union semun unsemds; #ifdef EXTRA_F_IN_SEMUN_BUF unsemds.buff = (struct semid_ds *)a; #else unsemds.buf = (struct semid_ds *)a; #endif ret = Semctl(id, n, cmd, unsemds); #else Perl_croak(aTHX_ "%s not implemented", PL_op_desc[optype]); #endif } break; #endif #ifdef HAS_SHM case OP_SHMCTL: ret = shmctl(id, cmd, (struct shmid_ds *)a); break; #endif } if (getinfo && ret >= 0) { SvCUR_set(astr, infosize); *SvEND(astr) = '\0'; SvSETMAGIC(astr); } return ret; } I32 Perl_do_msgsnd(pTHX_ SV **mark, SV **sp) { #ifdef HAS_MSG SV *mstr; char *mbuf; I32 id, msize, flags; STRLEN len; id = SvIVx(*++mark); mstr = *++mark; flags = SvIVx(*++mark); mbuf = SvPV(mstr, len); if ((msize = len - sizeof(long)) < 0) Perl_croak(aTHX_ "Arg too short for msgsnd"); SETERRNO(0,0); return msgsnd(id, (struct msgbuf *)mbuf, msize, flags); #else Perl_croak(aTHX_ "msgsnd not implemented"); #endif } I32 Perl_do_msgrcv(pTHX_ SV **mark, SV **sp) { #ifdef HAS_MSG SV *mstr; char *mbuf; long mtype; I32 id, msize, flags, ret; STRLEN len; id = SvIVx(*++mark); mstr = *++mark; /* suppress warning when reading into undef var --jhi */ if (! SvOK(mstr)) sv_setpvn(mstr, "", 0); msize = SvIVx(*++mark); mtype = (long)SvIVx(*++mark); flags = SvIVx(*++mark); SvPV_force(mstr, len); mbuf = SvGROW(mstr, sizeof(long)+msize+1); SETERRNO(0,0); ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags); if (ret >= 0) { SvCUR_set(mstr, sizeof(long)+ret); *SvEND(mstr) = '\0'; #ifndef INCOMPLETE_TAINTS /* who knows who has been playing with this message? */ SvTAINTED_on(mstr); #endif } return ret; #else Perl_croak(aTHX_ "msgrcv not implemented"); #endif } I32 Perl_do_semop(pTHX_ SV **mark, SV **sp) { #ifdef HAS_SEM SV *opstr; char *opbuf; I32 id; STRLEN opsize; id = SvIVx(*++mark); opstr = *++mark; opbuf = SvPV(opstr, opsize); if (opsize < sizeof(struct sembuf) || (opsize % sizeof(struct sembuf)) != 0) { SETERRNO(EINVAL,LIB$_INVARG); return -1; } SETERRNO(0,0); return semop(id, (struct sembuf *)opbuf, opsize/sizeof(struct sembuf)); #else Perl_croak(aTHX_ "semop not implemented"); #endif } I32 Perl_do_shmio(pTHX_ I32 optype, SV **mark, SV **sp) { #ifdef HAS_SHM SV *mstr; char *mbuf, *shm; I32 id, mpos, msize; STRLEN len; struct shmid_ds shmds; id = SvIVx(*++mark); mstr = *++mark; mpos = SvIVx(*++mark); msize = SvIVx(*++mark); SETERRNO(0,0); if (shmctl(id, IPC_STAT, &shmds) == -1) return -1; if (mpos < 0 || msize < 0 || mpos + msize > shmds.shm_segsz) { SETERRNO(EFAULT,SS$_ACCVIO); /* can't do as caller requested */ return -1; } shm = (char *)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0); if (shm == (char *)-1) /* I hate System V IPC, I really do */ return -1; if (optype == OP_SHMREAD) { /* suppress warning when reading into undef var (tchrist 3/Mar/00) */ if (! SvOK(mstr)) sv_setpvn(mstr, "", 0); SvPV_force(mstr, len); mbuf = SvGROW(mstr, msize+1); Copy(shm + mpos, mbuf, msize, char); SvCUR_set(mstr, msize); *SvEND(mstr) = '\0'; SvSETMAGIC(mstr); #ifndef INCOMPLETE_TAINTS /* who knows who has been playing with this shared memory? */ SvTAINTED_on(mstr); #endif } else { I32 n; mbuf = SvPV(mstr, len); if ((n = len) > msize) n = msize; Copy(mbuf, shm + mpos, n, char); if (n < msize) memzero(shm + mpos + n, msize - n); } return shmdt(shm); #else Perl_croak(aTHX_ "shm I/O not implemented"); #endif } #endif /* SYSV IPC */ /* =for apidoc start_glob Function called by C to spawn a glob (or do the glob inside perl on VMS). This code used to be inline, but now perl uses C this glob starter is only used by miniperl during the build proccess. Moving it away shrinks pp_hot.c; shrinking pp_hot.c helps speed perl up. =cut */ PerlIO * Perl_start_glob (pTHX_ SV *tmpglob, IO *io) { SV *tmpcmd = NEWSV(55, 0); PerlIO *fp; ENTER; SAVEFREESV(tmpcmd); #ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */ /* since spawning off a process is a real performance hit */ { #include #include #include #include char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'}; char vmsspec[NAM$C_MAXRSS+1]; char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp; char tmpfnam[L_tmpnam] = "SYS$SCRATCH:"; $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;"); PerlIO *tmpfp; STRLEN i; struct dsc$descriptor_s wilddsc = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0}; struct dsc$descriptor_vs rsdsc = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt}; unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0; /* We could find out if there's an explicit dev/dir or version by peeking into lib$find_file's internal context at ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb but that's unsupported, so I don't want to do it now and have it bite someone in the future. */ strcat(tmpfnam,PerlLIO_tmpnam(NULL)); cp = SvPV(tmpglob,i); for (; i; i--) { if (cp[i] == ';') hasver = 1; if (cp[i] == '.') { if (sts) hasver = 1; else sts = 1; } if (cp[i] == '/') { hasdir = isunix = 1; break; } if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') { hasdir = 1; break; } } if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) { Stat_t st; if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode)) ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL); else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL); if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer); while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt, &dfltdsc,NULL,NULL,NULL))&1)) { end = rstr + (unsigned long int) *rslt; if (!hasver) while (*end != ';') end--; *(end++) = '\n'; *end = '\0'; for (cp = rstr; *cp; cp++) *cp = _tolower(*cp); if (hasdir) { if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1); begin = rstr; } else { begin = end; while (*(--begin) != ']' && *begin != '>') ; ++begin; } ok = (PerlIO_puts(tmpfp,begin) != EOF); } if (cxt) (void)lib$find_file_end(&cxt); if (ok && sts != RMS$_NMF && sts != RMS$_DNF && sts != RMS$_FNF) ok = 0; if (!ok) { if (!(sts & 1)) { SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts); } PerlIO_close(tmpfp); fp = NULL; } else { PerlIO_rewind(tmpfp); IoTYPE(io) = IoTYPE_RDONLY; IoIFP(io) = fp = tmpfp; IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */ } } } #else /* !VMS */ #ifdef MACOS_TRADITIONAL sv_setpv(tmpcmd, "glob "); sv_catsv(tmpcmd, tmpglob); sv_catpv(tmpcmd, " |"); #else #ifdef DOSISH #ifdef OS2 sv_setpv(tmpcmd, "for a in "); sv_catsv(tmpcmd, tmpglob); sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |"); #else #ifdef DJGPP sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */ sv_catsv(tmpcmd, tmpglob); #else sv_setpv(tmpcmd, "perlglob "); sv_catsv(tmpcmd, tmpglob); sv_catpv(tmpcmd, " |"); #endif /* !DJGPP */ #endif /* !OS2 */ #else /* !DOSISH */ #if defined(CSH) sv_setpvn(tmpcmd, PL_cshname, PL_cshlen); sv_catpv(tmpcmd, " -cf 'set nonomatch; glob "); sv_catsv(tmpcmd, tmpglob); sv_catpv(tmpcmd, "' 2>/dev/null |"); #else sv_setpv(tmpcmd, "echo "); sv_catsv(tmpcmd, tmpglob); #if 'z' - 'a' == 25 sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|"); #else sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|"); #endif #endif /* !CSH */ #endif /* !DOSISH */ #endif /* MACOS_TRADITIONAL */ (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd), FALSE, O_RDONLY, 0, Nullfp); fp = IoIFP(io); #endif /* !VMS */ LEAVE; return fp; }