1 /*
2 * $DragonFly: src/tools/regression/nfsmmap/test2/test2.c,v 1.2 2003/11/07 14:38:38 eirikn Exp $
3 */
4
5 #include <sys/types.h>
6 #include <sys/fcntl.h>
7 #include <sys/mman.h>
8 #include <unistd.h>
9
main(int argc,char ** argv)10 int main(int argc, char** argv)
11 {
12 int fd, fd2;
13 caddr_t addr;
14 char zeros[4096];
15 char ones[200];
16
17 memset(zeros, 0, sizeof zeros);
18 memset(ones, 1, sizeof ones);
19 #if 0
20 unlink("test2.data");
21 fd = open("test2.data", O_RDWR|O_CREAT, 0666);
22 if (fd < 0)
23 err(1, "creating file");
24 if (write(fd, zeros, sizeof zeros) < 0)
25 err(1, "writing zeros");
26 close(fd);
27 #endif
28
29 fd = open("test2.data", O_RDWR);
30 if (fd < 0)
31 err(1, "opening file");
32 if (lseek(fd, 600, SEEK_SET) < 0)
33 err(1, "seeking");
34
35 if (write(fd, ones, sizeof ones) < 0)
36 err(1, "writing ones");
37
38 addr = mmap(0, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE, fd, 0);
39 if (addr == MAP_FAILED)
40 err(1, "mapping");
41 unlink("test2.scratch");
42 fd2 = open("test2.scratch", O_RDWR|O_CREAT, 0666);
43 if (fd2 < 0)
44 err(1, "creating scratch");
45
46 if (write(fd2, addr, 4096) < 0)
47 err(1, "writing scratch");
48 }
49