Berkeley DB

Error Support

Berkeley DB offers programmatic support for displaying error return values.

The db_strerror interface returns a pointer to the error message corresponding to any Berkeley DB error return, similar to the ANSI C strerror interface, but is able to handle both system error returns and Berkeley DB-specific return values.

For example:

int ret; 
if ((ret = dbp→put(dbp, NULL, &key, &data, 0)) != 0) {
        fprintf(stderr, "put failed: %s\n", db_strerror(ret)); 
        return (1); 
} 

There are also two additional error interfaces, DB→err and DB→errx. These interfaces work like the ANSI C X3.159-1989 (ANSI C) printf interface, taking a printf-style format string and argument list, and writing a message constructed from the format string and arguments. ...