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. This is similar to the ANSI C strerror interface, but it can handle both system error returns and Berkeley DB-specific return values.

For example:

int ret; 
if ((ret = dbenv→set_cachesize(dbenv, 0, 32 * 1024)) != 0) {
        fprintf(stderr, "set_cachesize failed: %s\n", db_strerror(ret)); 
        return (1); 
} 

There are also two additional error functions: DBENV→err and DBENV→errx. These functions work like the ANSI C printf interface, taking a printf-style format string and argument list, and writing a message constructed from the format string and arguments. ...