Read a string or choice-token configuration field by canonical schema key.
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| type(c_ptr), | value | :: | handle | |||
| character(kind=c_char, len=1), | intent(in) | :: | key(*) | |||
| character(kind=c_char, len=1), | intent(out) | :: | buffer(*) | |||
| integer(kind=c_int), | value | :: | buffer_len |