/*
* util_uuid_generate -- generate a uuid
*
* This function reads the uuid string from /proc/sys/kernel/random/uuid
* It converts this string into the binary uuid format as specified in
* https://www.ietf.org/rfc/rfc4122.txt
*/
int
util_uuid_generate(uuid_t uuid)
{
char uu[POOL_HDR_UUID_STR_LEN];
int fd = open(POOL_HDR_UUID_GEN_FILE, O_RDONLY);
if (fd < 0) {
/* Fatal error */
LOG(2, "!open(uuid)");
return -1;
}
ssize_t num = read(fd, uu, POOL_HDR_UUID_STR_LEN);
if (num < POOL_HDR_UUID_STR_LEN) {
/* Fatal error */
LOG(2, "!read(uuid)");
close(fd);
return -1;
}
close(fd);
uu[POOL_HDR_UUID_STR_LEN - 1] = '\0';
int ret = util_uuid_from_string(uu, (struct uuid *)uuid);
if (ret < 0)
return ret;
return 0;
}
int
main(int argc, char *argv[])
{
START(argc, argv, "util_uuid_generate");
uuid_t uuid;
uuid_t uuid1;
int ret;
char conv_uu[POOL_HDR_UUID_STR_LEN];
char uu[POOL_HDR_UUID_STR_LEN];
/*
* No string passed in. Generate uuid.
*/
if (argc == 1) {
/* generate a UUID string */
ret = ut_get_uuid_str(uu);
UT_ASSERTeq(ret, 0);
/*
* Convert the the string to a uuid, convert generated
* uuid back to a string and compare strings.
*/
ret = util_uuid_from_string(uu, (struct uuid *)&uuid);
UT_ASSERTeq(ret, 0);
ret = util_uuid_to_string(uuid, conv_uu);
UT_ASSERTeq(ret, 0);
UT_ASSERT(strncmp(uu, conv_uu, POOL_HDR_UUID_STR_LEN) == 0);
/*
* Generate uuid from util_uuid_generate and translate to
* string then back to uuid to verify they match.
*/
memset(uuid, 0, sizeof(uuid_t));
memset(uu, 0, POOL_HDR_UUID_STR_LEN);
memset(conv_uu, 0, POOL_HDR_UUID_STR_LEN);
ret = util_uuid_generate(uuid);
UT_ASSERTeq(ret, 0);
ret = util_uuid_to_string(uuid, uu);
UT_ASSERTeq(ret, 0);
ret = util_uuid_from_string(uu, (struct uuid *)&uuid1);
UT_ASSERTeq(ret, 0);
UT_ASSERT(memcmp(&uuid, &uuid1, sizeof(uuid_t)) == 0);
} else {
/*
* Caller passed in string.
*/
if (strcmp(argv[2], "valid") == 0) {
ret = util_uuid_from_string(argv[1],
(struct uuid *)&uuid);
UT_ASSERTeq(ret, 0);
ret = util_uuid_to_string(uuid, conv_uu);
UT_ASSERTeq(ret, 0);
} else {
ret = util_uuid_from_string(argv[1],
(struct uuid *)&uuid);
UT_ASSERT(ret < 0);
UT_OUT("util_uuid_generate: invalid uuid string");
}
}
DONE(NULL);
}
