setfl.c

该代码为unix环境高级编程的源代码

#include	<fcntl.h>
#include	"ourhdr.h"

void
set_fl(int fd, int flags) /* flags are file status flags to turn on */
{
	int		val;

	if ( (val = fcntl(fd, F_GETFL, 0)) < 0)
		err_sys("fcntl F_GETFL error");

	val |= flags;		/* turn on flags */

	if (fcntl(fd, F_SETFL, val) < 0)
		err_sys("fcntl F_SETFL error");
}