vfork is on the way out, don't perpetuate binaries w/ sys call

[unix-history] / usr / src / lib / libc / stdlib / system.c

/* @(#)system.c 4.2 (Berkeley) %G% */
#include        <signal.h>

system(s)
char *s;
{
       int status, pid, w;
       register int (*istat)(), (*qstat)();

       if ((pid = vfork()) == 0) {
               execl("/bin/sh", "sh", "-c", s, 0);
               _exit(127);
       }
       istat = signal(SIGINT, SIG_IGN);
       qstat = signal(SIGQUIT, SIG_IGN);
       while ((w = wait(&status)) != pid && w != -1)
               ;
       if (w == -1)
               status = -1;
       signal(SIGINT, istat);
       signal(SIGQUIT, qstat);
       return(status);
}