makemap - Create database maps for sendmail
/usr/sbin/makemap [-N] [-d] [-f] [-o] [-r] [-v] maptype mapname
-N Include the null byte that terminates strings in the map. This must
match the -N option in the sendmail.cf K line.
-d 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
-f Normally all uppercase letters in the key are folded to lower case.
This option disables that behavior. This is intended to mesh with the
-f option in the K line in sendmail.cf. The value is never case
-o Append to an old file. This allows you to augment an existing file.
-r Allow replacement of existing keys. Normally makemap complains if you
repeat a key, and does not do the insert.
-v Verbosely print what it is doing.
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.
The makemap command handles three different database formats, selected
using the maptype operand. They may be:
dbm DBM format maps. This requires the ndbm library. See ndbm(3).
btree B-Tree format maps. This requires the new Berkeley db library.
hash Hash format maps. This also requires the db 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 sub-
stitution. Literal percents should be doubled (%%). Blank lines and lines
beginning with the pound sign (#) are ignored.