mycat.c

来自「linux网络编程中的经典源码」· C语言 代码 · 共 22 行

#include	"unp.h"

int		my_open(const char *, int);

int
main(int argc, char **argv)
{
	int		fd, n;
	char	buff[BUFFSIZE];

	if (argc != 2)
		err_quit("usage: mycat <pathname>");

	if ( (fd = my_open(argv[1], O_RDONLY)) < 0)
		err_sys("cannot open %s", argv[1]);

	while ( (n = Read(fd, buff, BUFFSIZE)) > 0)
		Write(STDOUT_FILENO, buff, n);

	exit(0);
}