1#include <sys/uio.h>
2#include <stdio.h>
3#include <unistd.h>
4#include <errno.h>
5#include <string.h>
6#include <fcntl.h>
7
8int
9main()
10{
11	int fd = open("testfile", O_CREAT | O_RDWR, 0666);
12
13	if (fd < 0) {
14		printf("file open error %s\n", strerror(errno));
15		return 1;
16	}
17
18	int dummy;
19	int ret;
20	iovec vec1 = { &dummy, sizeof(dummy) };
21	ret = writev(fd, &vec1, 0x80000001);
22
23	if (ret < 0) {
24		printf("vec 1 write error %s\n", strerror(errno));
25	}
26
27	iovec vec2 = { (void *)0x80100000, 0x1000 };
28	ret = writev(fd, &vec2, 1);
29
30	if (ret < 0) {
31		printf("vec 2 write error %s\n", strerror(errno));
32	}
33
34	iovec vec3 = { 0, 1 };
35	ret = writev(fd, &vec3, 0xfff);
36
37	if (ret < 0) {
38		printf("vec 3 write error %s\n", strerror(errno));
39	}
40
41	close(fd);
42
43	return 0;
44}
45