摘自：https://www.jianshu.com/p/3f9c2e8ac9d0

 1 #include <stdio.h>
 2 #include <uuid/uuid.h>
 3 // yum -y install libuuid-devel.x86_64
 4 
 5 int test_libuuid()
 6 {
 7     uuid_t uuid1, uuid2, uuid3, uuid4, uuid5;
 8     char uuid1_str[37], uuid2_str[37], uuid3_str[37], uuid4_str[37];
 9 
10     uuid_generate(uuid1);
11     uuid_unparse(uuid1, uuid1_str);
12     fprintf(stdout, "uuid1 result: %s\n", uuid1_str);
13 
14 
15     uuid_generate_random(uuid2);
16     uuid_unparse_lower(uuid2, uuid2_str);
17     fprintf(stdout, "uuid2 result: %s\n", uuid2_str);
18 
19     uuid_generate_time(uuid3);
20     uuid_unparse_upper(uuid3, uuid3_str);
21     fprintf(stdout, "uuid3 result: %s\n", uuid3_str);
22 
23     uuid_generate_time_safe(uuid4);
24     uuid_unparse(uuid4, uuid4_str);
25     fprintf(stdout, "uuid4 result: %s\n", uuid4_str);
26 
27     uuid_parse(uuid1_str, uuid5);
28     int ret = uuid_compare(uuid1, uuid5);
29     fprintf(stdout, "uuid1 compare uuid5: %d\n", ret);
30 
31     ret = uuid_is_null(uuid1);
32     fprintf(stdout, "uuid1 is null: %d\n", ret);
33     uuid_clear(uuid1);
34     ret = uuid_is_null(uuid1);
35     fprintf(stdout, "uuid1 is null: %d\n", ret);
36 
37     ret = uuid_type(uuid2);
38     fprintf(stdout, "uuid2 type: %d\n", ret);
39     ret = uuid_variant(uuid2);
40     fprintf(stdout, "uuid2 variant: %d\n", ret);
41 
42     struct timeval tv;
43     time_t time_reg = uuid_time(uuid3, &tv);
44     fprintf(stdout, "uuid3 time is: (%ld, %ld): %s\n", tv.tv_sec, tv.tv_usec, ctime(&time_reg));
45 
46     return 0;
47 }
48 
49 int main()
50 {
51     test_libuuid();
52 
53     return 0;
54 }

 

gcc uuid.c -o uuid -luuid