NAME

     calife — becomes root (or another user) legally.

SYNOPSIS

     calife [-] [login]

            or

     ... [-] [login] for some sites (check with your administrator).

DESCRIPTION

     Calife requests user's own password for becoming login (or root, if no login is provided),
     and switches to that user and group ID after verifying proper rights to do so.  A shell is
     then executed.  If calife is executed by root, no password is requested and a shell with the
     appropriate user ID is executed.

     The invoked shell is the user's own except when a shell is specified in the configuration
     file calife.auth.

     If ``-'' is specified on the command line, user's profile files are read as if it was a
     login shell.

     This is not the traditional behavior of su.

     Only users specified in calife.auth can use calife to become another one with this method.

     You can specify in the calife.auth file the list of logins allowed for users when using
     calife.  See calife.auth(5) for more details.

     calife.auth is installed as /etc/calife.auth.

FILES

     /etc/calife.auth  List of users authorized to use calife and the users they can become.
     /etc/calife.out   This script is executed just after getting out of calife.

SEE ALSO

     su(1), calife.auth(5), group(5), environ(7)

ENVIRONMENT

     The original environment is kept. This is not a security problem as you have to be yourself
     at login (i.e. it does not have the same security implications as in su(1) ).

     Environment variables used by calife:

     HOME  Default home directory of real user ID.

     PATH  Default search path of real user ID unless modified as specified above.

     TERM  Provides terminal type which may be retained for the substituted user ID.

     USER  The user ID is always the effective ID (the target user ID) after an su unless the
           user ID is 0 (root).

BUGS

     The MD5-based crypt(3) function is slower and probably stronger than the DES-based one but
     it is usable only among FreeBSD 2.0+ systems.

HISTORY

     A calife command appeared in DG/UX, written for Antenne 2 in 1991. It has evolved
     considerably since this period with more OS support, user lists handling and improved
     logging.

     PAM support was introduced in 2005 to port it to MacOS X variants (Panther and up).

AUTHOR

     Ollivier Robert <roberto@keltia.freenix.fr>