wait_.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

/*
char id_wait[] = "@(#)wait_.c	1.1";
 *
 * wait for a child to die
 *
 * calling sequence:
 *	integer wait, status, chilid
 *	chilid = wait(status)
 * where:
 *	chilid will be	- >0 if child process id
 *			- <0 if (negative of) system error code
 *	status will contain the exit status of the child
 *		(see wait(2))
 */

extern int errno;

long wait_(status)
long *status;
{
	int stat;
	int chid = wait(&stat);
	if (chid < 0)
		return((long)(-errno));
	*status = (long)stat;
	return((long)chid);
}