NAME

       Linux::usermod - modify user and group accounts

SYNOPSIS

         use Linux::usermod;

         $user = Linux::usermod->new(username);
         $grp  = Linux::usermod->new(groupname, 1);

         $user->get(gid); # equal to $user->get(3);
         $user->get(uid); # equal to $user->get(2);
         $grp->get(gid);  # equal to $user->get(2);
         $grp->get(users);# equal to $user->get(3);

         #lock and unlock user account

         $user->lock();
         $user->unlock();

         #get password(passwd file)
         $user->get(ppassword);

         #get encoded password(shadow file)
         $user->get(password);

         #set encoded password
         $user->set(password);
         $grp->set(password);

         #set shell / group administrator
         $user->set(shell);
         $grp->set(ga);

         #set group users
         @users = qw(user1 user2);
         $grp->set(users, "@users");

         Linux::usermod->add(username);

         #or

         Linux::usermod->add(username, password, uid, gid, comment, home, shell);

         #where the password goes in shadow file and gid becomes
         #equal to uid unless specified and uid is becoming the
         #first unreserved number after 1000 unless specified

         #or

         @users = qw(user1 user2 user3);
         Linux::usermod->grpadd(groupname, gid, "@users")

         #where the password goes in gshadow file and gid becomes
         #equal to the second argument or the first unreserved number
         #after 100

         #delete user/group
         Linux::usermod->del(username);
         Linux::usermod->grpdel(groupname);

         #all fields are returned from the class methods fields/gfields
         print $user->get($_) for (Linux::usermod->fields);
         print $grp->get($_) for (Linux::usermod->gfields);

         #set working passwd and shadow files

         #$Linux::usermod::file_passwd = "./my_passwd";
         #$Linux::usermod::file_shadow = "./my_shadow";
         #$Linux::usermod::file_group  = "./my_group";
         #$Linux::usermod::file_gshadow= "./my_gshadow";

DESCRIPTION

       This module adds, removes and modify user and group accounts according to the passwd and
       shadow files syntax (like struct passwd from pwd.h). It is not necessary those accounts to
       be system as long as $Linux::usermod::file_passwd, $Linux::usermod::file_shadow,
       $Linux::usermod::file_group, $Linux::usermod::file_gshadow are not in "/etc" directory.

METHODS

       new
                Linux::usermod->new(username)
                Linux::usermod->new(grpname, 1)

               If group object second 'true' argument must be given

       add     (username, ...)  Class method - add new user account; arguments are optional,
               except username; they may be (username, password, uid, gid, comment, home, shell)

       del     (username) Class method - removes user account

       tobsd   converts user fields in shadow / master.passwd file to bsd style

       get     if used with user object returns one of the following fields:

                 'name'        or 0  The user's name
                 'ppassword'   or 1  The "passwd" file password
                 'uid'         or 2  The user's id
                 'gid'         or 3  The user's group id
                 'comment'     or 4  The comment about the user (real username)
                 'home'        or 5  The user's home directory
                 'shell'       or 6  The user's shell
                 'sname'       or 7  The user's name in shadow file
                 'password'    or 8  The 13-character encoded password
                 'lastchg'     or 9  The number of days since January 1, 1970 of the last password changed date
                 'min'         or 10 The minimum number of days required between password changes
                 'max'         or 11 The maximum number of days the password is valid
                 'warn'        or 12 The number of days before expiring the password that the user is warned
                 'inactive'    or 13 The number of days of inactivity allowed for the user
                 'expire'      or 14 The number of days since January 1, 1970 that account is disabled
                 'flag'        or 15 Currently not used

               if used with group object returns one of the following fields:

                 'name'        or 0  The group name
                 'ppassword'   or 1  The group password
                 'gid'         or 2  The group id number
                 'users'       or 3  The group members (users)
                 'sname'       or 4  The group name in gshadow file (the same as 'name')
                 'password'    or 5  The encrypted group password
                 'ga'          or 6  The group administrators
                 'gu'          or 7  The group members (users) (the same as 'users')

               argument can be either string or number

       set     (field)

               set a field which must be string of characters:

                 @user_fields = Linux::usermod->fields;        #user fields
                 @group_fields = Linux::usermod->gfields;      #group fields

       grpadd  (groupname)

       grpdel  (groupname)

       lock    (username) Lock user account (puts '!' at the beginning of the encoded password)

       unlock  (username) Unlock user account (removes '!' from the beginning of the encoded
               password)

       users   Class method - return hash which keys are all users, taken from $file_passwd

       grps    Class method - return hash which keys are all groups, taken from $file_group

FILES

       /etc/passwd /etc/shadow /etc/group /etc/gshadow

       unless given your own passwd, shadow, group, gshadow files which must be created

TO DO

       Groups and user accounts consistency checks

SEE ALSO

       getpwent(3), getpwnam(3), usermod(8), passwd(1), gpasswd(1)

BUGS

       None known. Report any to author.

AUTHOR

       Vidul Petrov, vidul@abv.bg

       (C) 2004 Vidul Petrov. All rights reserved.

       This library is free software; you can redistribute it and/or modify it under the same
       terms as Perl itself.