makemap - create database maps for sendmail
] [-c cachesize
] [-D commentchar
] [-t delim
] maptype mapnam
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
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 DB library.
- Hash format maps. This also requires the Berkeley 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 indicate
parameter substitution. Literal percents should be doubled (``%%''). Blank
lines and lines beginning with ``#'' are ignored.
Notice: do not
to create the aliases data base, but
which puts a special token into the data base that is
required by sendmail.
If the TrustedUser
option is set in the sendmail configuration file and
is invoked as root, the generated files will be owned by the
- Use the specified sendmail configuration file for looking up the
- Include the null byte that terminates strings in the map. This must match
the -N flag in the sendmail.cf ``K'' line.
- Use the specified hash and B-Tree cache size.
- Use to specify the character to use to indicate a comment (which is
ignored) instead of the default of '#'.
- 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
- Allow empty value (right hand side).
- Normally all upper case letters in the key are folded to lower case. This
flag disables that behaviour. This is intended to mesh with the -f flag in
the K line in sendmail.cf. The value is never case folded.
- List supported map types.
- 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.
- Ignore safety checks on maps being created. This includes checking for
hard or symbolic links in world writable directories.
- Use the specified delimiter instead of white space (also for dumping a
- dump (unmap) the content of the database to standard output.
- Verbosely print what it is doing.
command appeared in 4.4BSD.