access.c

来自「unix高级编程源代码.<<unix高级编程>>」· C语言 代码 · 共 23 行

#include	<sys/types.h>
#include	<fcntl.h>
#include	"ourhdr.h"

int
main(int argc, char *argv[])
{
	if (argc != 2)
		err_quit("usage: a.out <pathname>");

	if (access(argv[1], R_OK) < 0)
		err_ret("access error for %s", argv[1]);
	else
		printf("read access OK\n");

	if (open(argv[1], O_RDONLY) < 0)
		err_ret("open error for %s", argv[1]);
	else
		printf("open for reading OK\n");

	exit(0);
}