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

/* @(#)system.c	4.1 (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);
}
Commit	Line	Data
a59df51f BJ	1	/* @(#)system.c 4.1 (Berkeley) %G% */
	2	#include <signal.h>
	3
	4	system(s)
	5	char *s;
	6	{
	7	int status, pid, w;
	8	register int (istat)(), (qstat)();
	9
	10	if ((pid = vfork()) == 0) {
	11	execl("/bin/sh", "sh", "-c", s, 0);
	12	_exit(127);
	13	}
	14	istat = signal(SIGINT, SIG_IGN);
	15	qstat = signal(SIGQUIT, SIG_IGN);
	16	while ((w = wait(&status)) != pid && w != -1)
	17	;
	18	if (w == -1)
	19	status = -1;
	20	signal(SIGINT, istat);
	21	signal(SIGQUIT, qstat);
	22	return(status);
	23	}