/* @(#)system.c	4.1 (Berkeley) 12/21/80 */
#include	<signal.h>

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

	if((pid = fork()) == 0){
		execl("/bin/sh", "sh", "-c", s, 0);
		_exit(127);
	} else if(pid < 0)
		return(pid);
	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);
}
