/* doio.c * * Copyright (c) 1991-1999, 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 I_FCNTL #include #endif #ifdef I_SYS_FILE #include #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 /* XXX If this causes problems, set i_unistd=undef in the hint file. */ #ifdef I_UNISTD # include #endif #if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */ # include # if defined(USE_SOCKS) && defined(I_SOCKS) # include # endif # ifdef I_NETBSD # include # endif # ifndef ENOTSOCK # ifdef I_NET_ERRNO # include # endif # endif #endif /* Put this after #includes because defines _XOPEN_*. */ #ifndef Sock_size_t # if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__) # define Sock_size_t Size_t # else # define Sock_size_t int # endif #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_open9(gv, name, len, as_raw, rawmode, rawperm, supplied_fp, Nullsv, 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) { register IO *io = GvIOn(gv); PerlIO *saveifp = Nullfp; PerlIO *saveofp = Nullfp; char savetype = ' '; int writing = 0; PerlIO *fp; int fd; int result; bool was_fdopen = FALSE; PL_forkprocess = 1; /* assume true if no fork */ if (IoIFP(io)) { fd = PerlIO_fileno(IoIFP(io)); if (IoTYPE(io) == '-') result = 0; else if (fd <= PL_maxsysfd) { saveifp = IoIFP(io); saveofp = IoOFP(io); savetype = IoTYPE(io); result = 0; } else if (IoTYPE(io) == '|') 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) PerlIO_printf(Perl_error_log, "Warning: unable to close filehandle %s properly.\n", GvENAME(gv)); IoOFP(io) = IoIFP(io) = Nullfp; } if (as_raw) { #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) = '<'; break; case O_WRONLY: IoTYPE(io) = '>'; break; case O_RDWR: default: IoTYPE(io) = '+'; break; } writing = (result > 0); fd = PerlLIO_open3(name, rawmode, rawperm); if (fd == -1) fp = NULL; else { char *fpmode; if (result == O_RDONLY) fpmode = "r"; #ifdef O_APPEND else if (rawmode & O_APPEND) fpmode = (result == O_WRONLY) ? "a" : "a+"; #endif else fpmode = (result == O_WRONLY) ? "w" : "r+"; fp = PerlIO_fdopen(fd, fpmode); if (!fp) PerlLIO_close(fd); } } else { char *myname; char *type = name; char *otype = name; STRLEN tlen; STRLEN otlen = len; char mode[3]; /* stdio file mode ("r\0" or "r+\0") */ int dodup; if (num_svs) { type = name; name = SvPV(svs, tlen) ; len = (I32)tlen; } tlen = otlen; myname = savepvn(name, len); SAVEFREEPV(myname); name = myname; if (!num_svs) while (tlen && isSPACE(type[tlen-1])) type[--tlen] = '\0'; mode[0] = mode[1] = mode[2] = '\0'; IoTYPE(io) = *type; if (*type == '+' && tlen > 1 && type[tlen-1] != '|') { /* scary */ mode[1] = *type++; --tlen; writing = 1; } if (*type == '|') { if (num_svs && (tlen != 2 || type[1] != '-')) { unknown_desr: Perl_croak(aTHX_ "Unknown open() mode '%.*s'", otlen, otype); } /*SUPPRESS 530*/ for (type++; isSPACE(*type); type++) ; if (!num_svs) name = type; if (*name == '\0') { /* command is missing 19990114 */ dTHR; 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 (name[strlen(name)-1] == '|') { dTHR; name[strlen(name)-1] = '\0' ; if (ckWARN(WARN_PIPE)) Perl_warner(aTHX_ WARN_PIPE, "Can't open bidirectional pipe"); } fp = PerlProc_popen(name,"w"); writing = 1; } else if (*type == '>') { TAINT_PROPER("open"); type++; if (*type == '>') { mode[0] = IoTYPE(io) = 'a'; type++; tlen--; } else mode[0] = 'w'; writing = 1; if (num_svs && tlen != 1) goto unknown_desr; if (*type == '&') { name = type; duplicity: dodup = 1; name++; if (*name == '=') { dodup = 0; name++; } if (!*name && supplied_fp) fp = supplied_fp; else { /*SUPPRESS 530*/ for (; isSPACE(*name); name++) ; if (isDIGIT(*name)) fd = atoi(name); else { IO* thatio; gv = gv_fetchpv(name,FALSE,SVt_PVIO); thatio = GvIO(gv); 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 */ PerlIO_seek(fp, 0, SEEK_CUR); /* 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); if (IoTYPE(thatio) == 's') IoTYPE(io) = 's'; } else fd = -1; } if (dodup) fd = PerlLIO_dup(fd); else was_fdopen = TRUE; if (!(fp = PerlIO_fdopen(fd,mode))) { if (dodup) PerlLIO_close(fd); } } } else { /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; if (strEQ(type,"-")) { fp = PerlIO_stdout(); IoTYPE(io) = '-'; } else { fp = PerlIO_open((num_svs ? name : type), mode); } } } else if (*type == '<') { if (num_svs && tlen != 1) goto unknown_desr; /*SUPPRESS 530*/ for (type++; isSPACE(*type); type++) ; mode[0] = 'r'; if (*type == '&') { name = type; goto duplicity; } if (strEQ(type,"-")) { fp = PerlIO_stdin(); IoTYPE(io) = '-'; } else fp = PerlIO_open((num_svs ? name : type), mode); } else if (tlen > 1 && type[tlen-1] == '|') { if (num_svs) { if (tlen != 2 || type[0] != '-') goto unknown_desr; } else { type[--tlen] = '\0'; while (tlen && isSPACE(type[tlen-1])) type[--tlen] = '\0'; /*SUPPRESS 530*/ for (; isSPACE(*type); type++) ; name = type; } if (*name == '\0') { /* command is missing 19990114 */ dTHR; 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"); fp = PerlProc_popen(name,"r"); IoTYPE(io) = '|'; } else { if (num_svs) goto unknown_desr; name = type; IoTYPE(io) = '<'; /*SUPPRESS 530*/ for (; isSPACE(*name); name++) ; if (strEQ(name,"-")) { fp = PerlIO_stdin(); IoTYPE(io) = '-'; } else fp = PerlIO_open(name,"r"); } } if (!fp) { dTHR; if (ckWARN(WARN_NEWLINE) && IoTYPE(io) == '<' && strchr(name, '\n')) Perl_warner(aTHX_ WARN_NEWLINE, PL_warn_nl, "open"); goto say_false; } if (IoTYPE(io) && IoTYPE(io) != '|' && IoTYPE(io) != '-') { dTHR; 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) = 's'; /* 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 ) { char tmpbuf[256]; Sock_size_t buflen = sizeof tmpbuf; if (PerlSock_getsockname(PerlIO_fileno(fp), (struct sockaddr *)tmpbuf, &buflen) >= 0 || errno != ENOTSOCK) IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */ /* but some return 0 for streams too, sigh */ } #endif } if (saveifp) { /* must use old fp? */ fd = PerlIO_fileno(saveifp); if (saveofp) { PerlIO_flush(saveofp); /* emulate PerlIO_close() */ if (saveofp != saveifp) { /* was a socket? */ PerlIO_close(saveofp); if (fd > 2) Safefree(saveofp); } } if (fd != PerlIO_fileno(fp)) { Pid_t pid; SV *sv; PerlLIO_dup2(PerlIO_fileno(fp), fd); sv = *av_fetch(PL_fdpid,PerlIO_fileno(fp),TRUE); (void)SvUPGRADE(sv, SVt_IV); pid = SvIVX(sv); SvIVX(sv) = 0; sv = *av_fetch(PL_fdpid,fd,TRUE); (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; if (writing) { dTHR; if (IoTYPE(io) == 's' || (IoTYPE(io) == '>' && S_ISCHR(PL_statbuf.st_mode)) ) { if (!(IoOFP(io) = PerlIO_fdopen(PerlIO_fileno(fp),"w"))) { 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) { dTHR; 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 { dTHR; if (ckWARN_d(WARN_INPLACE)) { if (!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(errno)); } } } 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(wstio) = '>'; 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) { dTHR; if (ckWARN(WARN_UNOPENED)) Perl_warner(aTHX_ WARN_UNOPENED, "Close on unopened file <%s>",GvENAME(gv)); SETERRNO(EBADF,SS$_IVCHAN); } return FALSE; } retval = io_close(io, not_implicit); if (not_implicit) { IoLINES(io) = 0; IoPAGE(io) = 0; IoLINES_LEFT(io) = IoPAGE_LEN(io); } IoTYPE(io) = ' '; return retval; } bool Perl_io_close(pTHX_ IO *io, bool not_implicit) { bool retval = FALSE; int status; if (IoIFP(io)) { if (IoTYPE(io) == '|') { status = PerlProc_pclose(IoIFP(io)); if (not_implicit) { STATUS_NATIVE_SET(status); retval = (STATUS_POSIX == 0); } else { retval = (status != -1); } } else if (IoTYPE(io) == '-') retval = TRUE; else { if (IoOFP(io) && IoOFP(io) != IoIFP(io)) { /* a socket */ retval = (PerlIO_close(IoOFP(io)) != EOF); PerlIO_close(IoIFP(io)); /* clear stdio, fd already closed */ } else retval = (PerlIO_close(IoIFP(io)) != EOF); } IoOFP(io) = IoIFP(io) = Nullfp; } else if (not_implicit) { SETERRNO(EBADF,SS$_IVCHAN); } return retval; } bool Perl_do_eof(pTHX_ GV *gv) { dTHR; register IO *io; int ch; io = GvIO(gv); if (!io) return TRUE; else if (ckWARN(WARN_IO) && (IoTYPE(io) == '>' || IoIFP(io) == PerlIO_stdout() || IoIFP(io) == PerlIO_stderr())) { SV* sv = sv_newmortal(); gv_efullname3(sv, gv, Nullch); Perl_warner(aTHX_ WARN_IO, "Filehandle %s opened only for output", SvPV_nolen(sv)); } 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); } { dTHR; if (ckWARN(WARN_UNOPENED)) Perl_warner(aTHX_ WARN_UNOPENED, "tell() on unopened file"); } SETERRNO(EBADF,RMS$_IFI); return (Off_t)-1; } bool Perl_do_seek(pTHX_ GV *gv, Off_t pos, int whence) { register IO *io; register PerlIO *fp; if (gv && (io = GvIO(gv)) && (fp = IoIFP(io))) { #ifdef ULTRIX_STDIO_BOTCH if (PerlIO_eof(fp)) (void)PerlIO_seek(fp, 0L, 2); /* ultrix 1.2 workaround */ #endif return PerlIO_seek(fp, pos, whence) >= 0; } { dTHR; if (ckWARN(WARN_UNOPENED)) Perl_warner(aTHX_ WARN_UNOPENED, "seek() on unopened file"); } SETERRNO(EBADF,RMS$_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); { dTHR; if (ckWARN(WARN_UNOPENED)) Perl_warner(aTHX_ WARN_UNOPENED, "sysseek() on unopened file"); } SETERRNO(EBADF,RMS$_IFI); return (Off_t)-1; } int Perl_do_binmode(pTHX_ PerlIO *fp, int iotype, int flag) { if (flag != TRUE) Perl_croak(aTHX_ "panic: unsetting binmode"); /* Not implemented yet */ #ifdef DOSISH #if defined(atarist) || defined(__MINT__) if (!PerlIO_flush(fp) && (fp->_flag |= _IOBIN)) return 1; else return 0; #else if (PerlLIO_setmode(PerlIO_fileno(fp), OP_BINARY) != -1) { #if defined(WIN32) && defined(__BORLANDC__) /* The translation mode of the stream is maintained independent * of the translation mode of the fd in the Borland RTL (heavy * digging through their runtime sources reveal). User has to * set the mode explicitly for the stream (though they don't * document this anywhere). GSAR 97-5-24 */ PerlIO_seek(fp,0L,0); ((FILE*)fp)->flags |= _F_BIN; #endif return 1; } else return 0; #endif #else #if defined(USEMYBINMODE) if (my_binmode(fp,iotype) != FALSE) return 1; else return 0; #else return 1; #endif #endif } #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: { dTHR; 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: 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 || PerlIO_error(fp))) return FALSE; return !PerlIO_error(fp); } I32 Perl_my_stat(pTHX) { djSP; IO *io; GV* tmpgv; if (PL_op->op_flags & OPf_REF) { EXTEND(SP,1); tmpgv = cGVOP_gv; do_fstat: io = GvIO(tmpgv); if (io && IoIFP(io)) { PL_statgv = tmpgv; sv_setpv(PL_statname,""); PL_laststype = OP_STAT; return (PL_laststatval = PerlLIO_fstat(PerlIO_fileno(IoIFP(io)), &PL_statcache)); } else { if (tmpgv == PL_defgv) return PL_laststatval; if (ckWARN(WARN_UNOPENED)) Perl_warner(aTHX_ WARN_UNOPENED, "Stat on unopened file <%s>", GvENAME(tmpgv)); 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) { tmpgv = (GV*)sv; goto do_fstat; } else if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVGV) { tmpgv = (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) { djSP; 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) { dTHR; 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 (*PL_Argv[0] != '/') /* will execvp use PATH? */ TAINT_ENV(); /* testing IFS here is overkill, probably */ if (really && *(tmps = SvPV(really, n_a))) PerlProc_execvp(tmps,PL_Argv); else PerlProc_execvp(PL_Argv[0],PL_Argv); if (ckWARN(WARN_EXEC)) Perl_warner(aTHX_ WARN_EXEC, "Can't exec \"%s\": %s", 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 && isALPHA(*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; } { dTHR; 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) { dTHR; 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) { dTHR; 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) { dTHR; 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; semun.buf = &semds; 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; unsemds.buf = (struct semid_ds *)a; 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 dTHR; 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 dTHR; SV *mstr; char *mbuf; long mtype; I32 id, msize, flags, ret; STRLEN len; id = SvIVx(*++mark); mstr = *++mark; 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'; } return ret; #else Perl_croak(aTHX_ "msgrcv not implemented"); #endif } I32 Perl_do_semop(pTHX_ SV **mark, SV **sp) { #ifdef HAS_SEM dTHR; 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 dTHR; 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) { SvPV_force(mstr, len); mbuf = SvGROW(mstr, msize+1); Copy(shm + mpos, mbuf, msize, char); SvCUR_set(mstr, msize); *SvEND(mstr) = '\0'; SvSETMAGIC(mstr); } 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 */