CRTL, getclock, Return Values
*Conan The Librarian
0 Indicates success. -1 Indicates an error; errno is set to one of the following values: o EINVAL - The clktyp argument does not specify a known system-wide clock. Or, the value of SYS$TIMEZONE_DIFFERENTIAL logical is wrong. o EIO - An error occurred when the system- wide clock specified by the clktyp argument was accessed.