dbmmanage

dbmmanage(1)                General Commands Manual               dbmmanage(1)



NAME
       dbmmanage - Create and update user authentication files in DBM format

SYNOPSIS
       dbmmanage filename [ command ] [ username [ encpasswd ] ]

DESCRIPTION
       dbmmanage is used to create and update the DBM format files used to
       store usernames and password for basic authentication of HTTP users.
       Resources available from the httpd 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.

       This manual page only lists the command line arguments. For details of
       the directives necessary to configure user authentication in httpd see
       the Apache manual, which is part of the Apache distribution or can be
       found at http://httpd.apache.org/.

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

       command
              This selects the operation to perform:

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

       adduser     Asks for a password and then adds an entry for username to
                   filename .

       check       Asks for a password and then checks if username is in
                   filename and if it's password matches the specified one.

       delete      Deletes the username entry from filename.

       import      Reads username:password entries (one per line) from STDIN
                   and adds them to filename. The passwords already has to be
                   crypted.

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

       view        Just displays the complete contents of the DBM file.

       username    The user for which the update operation is performed.

BUGS
       One should be aware that there are a number of different DBM file
       formats in existance, 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,
       will simply return nothing, 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 standard @AnyDBM::ISA ordering in perl, 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.

       Apache's mod_auth_db.c module corresponds to Berkeley DB 2 library,
       while mod_auth_dbm.c corresponds to the NDBM library.  Also, one can
       usually use the file program supplied with most Unix systems to see
       what format a DBM file is in.

SEE ALSO
       httpd(8)



                                  March 1998                      dbmmanage(1)