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Annotation of 43BSD/lib/libc/gen/system.c, revision 1.1.1.1

1.1       root        1: #if defined(LIBC_SCCS) && !defined(lint)
                      2: static char sccsid[] = "@(#)system.c   5.2 (Berkeley) 3/9/86";
                      3: #endif LIBC_SCCS and not lint
                      4: 
                      5: #include       <signal.h>
                      6: 
                      7: system(s)
                      8: char *s;
                      9: {
                     10:        int status, pid, w;
                     11:        register int (*istat)(), (*qstat)();
                     12: 
                     13:        if ((pid = vfork()) == 0) {
                     14:                execl("/bin/sh", "sh", "-c", s, 0);
                     15:                _exit(127);
                     16:        }
                     17:        istat = signal(SIGINT, SIG_IGN);
                     18:        qstat = signal(SIGQUIT, SIG_IGN);
                     19:        while ((w = wait(&status)) != pid && w != -1)
                     20:                ;
                     21:        if (w == -1)
                     22:                status = -1;
                     23:        signal(SIGINT, istat);
                     24:        signal(SIGQUIT, qstat);
                     25:        return(status);
                     26: }

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