1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | #include <stdio.h>#include <string.h>#include <mysql/my_global.h>#include <mysql/my_sys.h>#include <mysql/mysql.h>#include <mysql/m_ctype.h>#include <mysql/m_string.h>#define UUID_LEN 36#define FMASK "%36s"#define UUID "/proc/sys/kernel/random/uuid"my_bool newid_init(UDF_INIT *initid, UDF_ARGS *args, char *message);void new_deinit(UDF_INIT *initid);char *newid(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error);my_bool newid_init(UDF_INIT *initid, UDF_ARGS *args, char *message){ if (args->arg_count != 0 || args->arg_type[0] != STRING_RESULT) { strcpy(message, "Wrong arguments to newid; Use the source"); return 1; } initid->max_length=UUID_LEN; return 0;}void newid_deinit(UDF_INIT *initid){//}char *newid(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error){FILE *fp;char id[UUID_LEN]; if ((fp = fopen(UUID, "r")) != NULL) { fscanf(fp, FMASK, id); memcpy(result, id, initid->max_length); // UUID_LEN *length = initid->max_length; // UUID_LEN *error = 0; *is_null = 0; return result; } *is_null = 1; *error = 1; free(result); return NULL;} |
Provides a newid function, which returns an UUID from the kernel's random pool.
No comments :
Post a Comment