makemap - Create database maps for sendmail
/usr/sbin/makemap [-N] [-d] [-f] [-o] [-r] [-v] maptype mapname
The makemap command creates the database maps used by the keyed map lookups in sendmail(8). It reads input from the standard input and outputs them to the indicated mapname.
Depending on how it is compiled, makemap handles up to three different database formats, selected using the maptype parameter. They may be DBM format maps. This requires the ndbm(3) library. B-Tree format maps. This requires the new Berkeley dbm(3) library. Hash format maps. This also requires the dbm(3) library.
In all cases, makemap reads lines from the standard input consisting of two words separated by white space. The first is the database key, the second is the value. The value may contain %n strings to indicated parameter substitution. Literal percents should be doubled (%%). Blank lines and lines beginning with the pound sign (#) are ignored.
Include the null byte that terminates strings in the map. This must match the -N flag in the sendmail.cf K line. Allow duplicate keys in the map. This is only allowed on B-Tree format maps. If two identical keys are read, they will both be inserted into the map. Normally all uppercase letters in the key are folded to lower case. This flag disables that behavior. This is intended to mesh with the -f flag in the K line in sendmail.cf. The value is never case folded. Append to an old file. This allows you to augment an existing file. Allow replacement of existing keys. Normally makemap complains if you repeat a key, and does not do the insert. Verbosely print what it is doing.
As provided by DIGITAL, only dbm maps are supported.