MirBSD manpage: dbmmanage(1)

DBMMANAGE(1)                 BSD Reference Manual                 DBMMANAGE(1)


     dbmmanage - create and update user authentication files in DBM format


     dbmmanage filename [command] [username [encpassword]]


     dbmmanage is used to create and update the DBM format files used to store
     usernames and passwords for basic authentication of HTTP users. Resources
     available from the httpd(8) Apache web server can be restricted to just
     the users listed in the files created by dbmmanage. This program can only
     be used when the usernames are stored in a DBM file. To use a flat-file
     database see htpasswd(1).

     This manual page only lists the command line arguments. For details of
     the directives necessary to configure user authentication in httpd(8),
     see the Apache manual, which can be found in /var/www/htdocs/manual/.

     The options are as follows:

     command        This selects the operation to perform:

                    add        Add an entry for username to filename using the
                               encrypted password encpassword.

                    adduser    Ask for a password and then add an entry for
                               username to filename.

                    check      Ask for a password and then check if username
                               is in filename and if its password matches the
                               specified one.

                    delete     Delete the username entry from filename.

                    import     Read username:password entries (one per line)
                               from stdin and add them to filename. The pass-
                               word already has to be encrypted.

                    update     Same as the adduser command, except that it
                               makes sure username already exists in filename.

                    view       Just display the complete contents of the DBM

     encpassword    The password to be encrypted.

     filename       The filename of the DBM format file. Usually without the
                    extension .db, .pag, or .dir.

     username       The user for which the update operation is performed.


     htdigest(1), htpasswd(1), httpd(8)


     One should be aware that there are a number of different DBM file formats
     in existence, and with all likelihood, libraries for more than one format
     may exist on your system. The three primary examples are NDBM, the GNU
     project's GDBM, and Berkeley DB 2. Unfortunately, all these libraries use
     different file formats, and you must make sure that the file format used
     by filename is the same format that dbmmanage expects to see. dbmmanage
     currently has no way of determining what type of DBM file it is looking
     at. If used against the wrong format, dbmmanage will simply return noth-
     ing, or may create a different DBM file with a different name, or at
     worst, it may corrupt the DBM file if you were attempting to write to it.

     dbmmanage has a list of DBM format preferences, defined by the
     "@AnyDBM::ISA" array near the beginning of the program. Since we prefer
     the Berkeley DB 2 file format, the order in which dbmmanage will look for
     system libraries is Berkeley DB 2, then NDBM, and then GDBM. The first
     library found will be the library dbmmanage will attempt to use for all
     DBM file transactions. This ordering is slightly different than the stan-
     dard "@AnyDBM::ISA" ordering in perl(1), as well as the ordering used by
     the simple dbmopen() call in perl, so if you use any other utilities to
     manage your DBM files, they must also follow this preference ordering.
     Similar care must be taken if using programs in other languages, like C,
     to access these files.

     httpd(8)'s mod_auth_db.c module corresponds to the Berkeley DB 2 library,
     while mod_auth_dbm.c corresponds to the NDBM library. Also, one can usu-
     ally use the file(1) program supplied with most UNIX systems to see what
     format a DBM file is in.

MirBSD #10-current              March 19, 2008                               1

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