Commit | Line | Data |
---|---|---|
90219914 MD |
1 | #include <sys/types.h> |
2 | #include <sys/stat.h> | |
3 | #include <fcntl.h> | |
4 | #include <sys/mman.h> | |
5 | #include <stdio.h> | |
6 | #include <stdint.h> | |
7 | #include <unistd.h> | |
8 | #include <errno.h> | |
9 | #include <uuid/uuid.h> | |
10 | #include <string.h> | |
11 | ||
12 | #define FILE_LEN (4 * 4096) | |
13 | ||
14 | int main(int argc, char **argv) | |
15 | { | |
16 | char *base, *pos; | |
17 | int fd, ret; | |
18 | off_t off; | |
19 | uuid_t uuid; | |
20 | ||
21 | fd = open("dummystream", O_RDWR|O_CREAT, S_IRUSR|S_IWUSR); | |
22 | if (fd < 0) { | |
23 | perror("open"); | |
24 | return -1; | |
25 | } | |
26 | off = posix_fallocate(fd, 0, FILE_LEN); | |
27 | if (off < 0) { | |
28 | printf("Error in fallocate\n"); | |
29 | return -1; | |
30 | } | |
31 | #if 0 | |
32 | { | |
33 | ssize_t len; | |
34 | ||
35 | off = lseek(fd, FILE_LEN - 1, SEEK_CUR); | |
36 | if (off < 0) { | |
37 | perror("lseek"); | |
38 | return -1; | |
39 | } | |
40 | len = write(fd, "", 1); | |
41 | if (len < 0) { | |
42 | perror("write"); | |
43 | return -1; | |
44 | } | |
45 | } | |
46 | #endif | |
47 | base = mmap(NULL, FILE_LEN, PROT_READ|PROT_WRITE, | |
48 | MAP_SHARED, fd, 0); | |
49 | if (!base) { | |
50 | perror("mmap"); | |
51 | return -1; | |
52 | } | |
53 | pos = base; | |
54 | ||
55 | /* magic */ | |
56 | *(uint32_t *) pos = 0xC1FC1FC1; | |
57 | pos += sizeof(uint32_t); | |
58 | ||
59 | /* trace_uuid */ | |
60 | ret = uuid_parse("2a6422d0-6cee-11e0-8c08-cb07d7b3a564", uuid); | |
61 | if (ret) { | |
62 | printf("uuid parse error\n"); | |
63 | return -1; | |
64 | } | |
65 | memcpy(pos, uuid, 16); | |
66 | pos += 16; | |
67 | ||
68 | /* stream_id */ | |
69 | *(uint32_t *) pos = 0; | |
70 | pos += sizeof(uint32_t); | |
71 | ||
72 | ret = munmap(base, FILE_LEN); | |
73 | if (ret) { | |
74 | perror("munmap"); | |
75 | return -1; | |
76 | } | |
77 | close(fd); | |
78 | return 0; | |
79 | } | |
80 | ||
81 |