cdbget kcdbget searches for a record with key k in a constant database. The constant database must be readable (and seekable) on cdbget's standard input.
Normally cdbget prints the data in the first record with key k and exits 0. If there is no record with the key k, cdbget exits 100 without printing anything.
If cdbget encounters a read error, write error, or database format error, it complains and exits 111.
cdbget k sGiven a numeric s argument, cdbget skips past the first s records with key k, and prints the data in the next record.