# 2.11BSD#431 - /usr/src/lib/libc/gen/system.c

##### Functions

    system            X

       1: /*
       2:  * Copyright (c) 1988 The Regents of the University of California.
       3:  * All rights reserved.
       4:  *
       5:  * Redistribution and use in source and binary forms, with or without
       6:  * modification, are permitted provided that the following conditions
       7:  * are met:
       8:  * 1. Redistributions of source code must retain the above copyright
       9:  *    notice, this list of conditions and the following disclaimer.
      10:  * 2. Redistributions in binary form must reproduce the above copyright
      11:  *    notice, this list of conditions and the following disclaimer in the
      12:  *    documentation and/or other materials provided with the distribution.
      13:  * 3. All advertising materials mentioning features or use of this software
      14:  *    must display the following acknowledgement:
      15:  *	This product includes software developed by the University of
      16:  *	California, Berkeley and its contributors.
      17:  * 4. Neither the name of the University nor the names of its contributors
      18:  *    may be used to endorse or promote products derived from this software
      19:  *    without specific prior written permission.
      20:  *
      21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
      22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
      23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
      25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
      27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
      28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
      29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
      30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
      31:  * SUCH DAMAGE.
      32:  */
      33:
      34: #if defined(LIBC_SCCS) && !defined(lint)
      35: static char sccsid[] = "@(#)system.c	5.10.1 (2.11BSD) 1999/10/24";
      36: #endif /* LIBC_SCCS and not lint */
      37:
      38: #include <stdio.h>
      39: #include <sys/types.h>
      40: #include <sys/signal.h>
      41: #include <sys/wait.h>
      42:
      43: system(command)
      44:     char *command;
      45: {
      46:     union wait pstat;
      47:     register int pid;
      48:     sigset_t omask, nmask;
      49:     int (*intsave)(), (*quitsave)();
      50:
      51:     if (!command)       /* just checking... */
      52:         return(1);
      53:
      54:     sigemptyset(&nmask);
      55:     sigaddset(&nmask, SIGCHLD);
      56:     (void)sigprocmask(SIG_BLOCK, &nmask, &omask);
      57:     switch(pid = vfork()) {
      58:     case -1:            /* error */
      59:         (void)sigprocmask(SIG_SETMASK, &omask, NULL);
      60:         pstat.w_status = 0;
      61:         pstat.w_retcode = 127;
      62:         return(pstat.w_status);
      63:     case 0:             /* child */
      64:         (void)sigprocmask(SIG_SETMASK, &omask, NULL);
      65:         execl("/bin/sh", "sh", "-c", command, (char *)NULL);
      66:         _exit(127);
      67:     }
      68:     intsave = signal(SIGINT, SIG_IGN);
      69:     quitsave = signal(SIGQUIT, SIG_IGN);
      70:     pid = waitpid(pid, (int *)&pstat, 0);
      71:     (void)sigprocmask(SIG_SETMASK, &omask, NULL);
      72:     (void)signal(SIGINT, intsave);
      73:     (void)signal(SIGQUIT, quitsave);
      74:     return(pid == -1 ? -1 : pstat.w_status);
      75: }

#### Defined functions

system defined in line 43; used 82 times

- in /usr/include/stdlib.h line 87
- in /usr/src/bin/mail.c line 275
- in /usr/src/bin/make/gcos.c line 323
- in /usr/src/bin/tar.c line 344
- in /usr/src/games/btlgammon/btlgammon.c line 142
- in /usr/src/games/canfield.c line 1276
- in /usr/src/games/cribbage/crib.c line 86
- in /usr/src/games/phantasia/phant_run.c line 15
- in /usr/src/games/snake/snake.c line 255, 890
- in /usr/src/games/worm.c line 262
- in /usr/src/local/less/signal.c line 192
- in /usr/src/local/mtools/mcopy.c line 160, 198
- in /usr/src/local/zmodem/genie.c line 65-67(3)
- in /usr/src/local/zmodem/minirb.c line 49-50(2)
- in /usr/src/local/zmodem/rz.c line 1538
- in /usr/src/local/zmodem/sz.c line 1966
- in /usr/src/new/PORT/B/src/bint/b3fil.c line 72
- in /usr/src/new/PORT/B/src/bint/b3mai.c line 266
- in /usr/src/new/PORT/B/src/bsmall/b2fil.c line 64, 74, 83, 91, 182
- in /usr/src/new/PORT/B/src/bsmall/b2sou.c line 276
- in /usr/src/new/jove/teachjove.c line 35
- in /usr/src/new/kermit5.188/ckufio.c line 2831, 2876-2879(2), 2885-2890(3)
- in /usr/src/new/notes/src/archiver.c line 298
- in /usr/src/new/notes/src/nfabort.c line 55-57(2)
- in /usr/src/new/notes/src/nfcomment.c line 51
- in /usr/src/new/rcs/src/ci.c line 454, 470
- in /usr/src/new/rcs/src/co.c line 593-598(2), 605
- in /usr/src/new/rcs/src/rcs.c line 1020, 1476
- in /usr/src/new/rcs/src/rcsclean.c line 131
- in /usr/src/new/rcs/src/rcsdiff.c line 211, 223, 231
- in /usr/src/new/rcs/src/rcsmerge.c line 140, 146, 155
- in /usr/src/new/rcs/src/rcsutil.c line 361
- in /usr/src/new/rcs/src/sccstorcs.c line 282, 322, 356
- in /usr/src/old/prmail/prmail.c line 72
- in /usr/src/old/v6/v6.c line 87
- in /usr/src/sbin/newfs/newfs.c line 193
- in /usr/src/share/zoneinfo/zic.c line 1256
- in /usr/src/ucb/man/man.c line 143
- in /usr/src/ucb/msgs/msgs.c line 742
- in /usr/src/usr.bin/patch/dist/util.c line 303
- in /usr/src/usr.bin/patch/inp.c line 101, 112
- in /usr/src/usr.bin/patch/util.c line 316
- in /usr/src/usr.bin/refer/hunt8.c line 17
- in /usr/src/usr.bin/refer/inv1.c line 139, 145-148(2)
- in /usr/src/usr.bin/refer/refer7.c line 40
- in /usr/src/usr.bin/refer/sortbib.c line 141
- in /usr/src/usr.bin/uucp/uucp.c line 386
- in /usr/src/usr.bin/uucp/uulog.c line 68-72(2)
- in /usr/src/usr.lib/libF77/mkindx.c line 45
- in /usr/src/usr.lib/libI77/mkindx.c line 45
- in /usr/src/usr.sbin/catman/catman.c line 234, 249
- in /usr/src/usr.sbin/named/tools/nslookup/list.c line 792

#### Defined variables

sccsid defined in line 35; never used

Last modified: 1999-10-24 Generated: 2016-12-26 | Generated by src2html V0.67 page hit count: 736 |