t_isastream.c

UNIX环境高级编程第二版（英文版）配书的源代码

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

int
main(int argc, char *argv[])
{
	int		i, fd;

	for (i = 1; i < argc; i++) {
		if ((fd = open(argv[i], O_RDONLY)) < 0) {
			err_ret("%s: can't open", argv[i]);
			continue;
		}

		if (isastream(fd) == 0)
			err_ret("%s: not a stream", argv[i]);
		else
			err_msg("%s: streams device", argv[i]);
	}

	exit(0);
}