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
8 int
main()9 main()
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