source: trunk/debathena/debathena/dotfiles/bashrc @ 23782

# Global bashrc file
#
# $Id: bashrc,v 1.39 2006-07-17 23:14:07 rbasch Exp $

# This file is sourced by default user file ~/.bashrc

initdir=/usr/lib/init

# add alias moved here to avoid having two copies of it.

add () { eval "$( /bin/attach -Padd -b "$@" )" ; }


# *******************   ENVIRONMENT SETUP   *******************



# Set up standard system/user environment configuration (including setup of
# environment variables, attachment of lockers, and setting of search path)

# If we see ENV_SET set to empty, we could be a tcsh user who has
# decided to run bash, or we could be a bash user suffering from the
# misfeature that the standard xsession script runs the tcsh dotfiles
# for all users.  Running the environment setup for the former
# category of user would be unfriendly (it resets the homedir and
# changes the path), so for now, only run environment setup for bash
# users.  If the xsession problem is ever fixed, change this
# conditional to check for '"${ENV_SET+set}" != set' and eliminate the
# shell check.
if [ "${ENV_SET:+set}" != set -a "${SHELL##*/}" = bash ]; then

        export ENV_SET=t                        # Avoid unnecessary repeat
        export HOSTTYPE="`/bin/machtype`"

        if [ -r "$HOME/.generation" ]; then
                export ATHENA_DOTFILE_GENERATION=`cat "$HOME/.generation"`
        else
                export ATHENA_DOTFILE_GENERATION=0
        fi

        umask 077                               # Strictly protect files
                                                #  (does not apply in AFS)
        ulimit -S -c 0                          # Don't allow coredumps
        export EDITOR=emacs                     # Set default editor
        export MM_CHARSET=iso-8859-1

        export EMAIL="$USER@mit.edu"            # Set default email address

        export MORE=-s

        # Set double-sided printing for sufficiently recent users.
        if [ 1 -le "$ATHENA_DOTFILE_GENERATION" ]; then
                export LPROPT=-Zduplex
        fi

        export ATHENA_SYS=`/bin/machtype -S`
        export ATHENA_SYS_COMPAT=`/bin/machtype -C`

        if [ -z "$ATHENA_SYS" ]; then
                export ATHENA_SYS=@sys
        fi

        if [ "${PRINTER+set}" != set \
          -a -e /var/run/athena-clusterinfo.csh ]; then
                PRINTER=`awk '/LPR/ { print $3 }' \
                  /var/run/athena-clusterinfo.csh`
                if [ -n "$PRINTER" ]; then export PRINTER; fi
        fi

        # Reset the HOME variable to correspond to the actual location
        # of the user's home directory.  This will avoid having long
        # pathnames being printed when /mit/<user> is a symlink to a
        # path within AFS.

        x=`(cd && /bin/pwd) 2>/dev/null`
        if [ -n "$x" ]; then
                export HOME=$x
                if [ "$x" = "`/bin/pwd`" ]; then
                        cd "$HOME"
                fi
        fi
        unset x

        # Run user environment customizations identified in your
        # ~/.bash_environment file.  This is the place to include your
        # own environment variables, attach commands, and other system
        # wide setup commands.  You can also cancel default behaviors
        # listed above.
        # ~/.bash_environment is not sourced if NOCALLS is set (i.e.,
        # if you selected the xlogin "Ignore your customizations"
        # option when you logged in).

        if [ "${NOCALLS+set}" != set -a -r ~/.bash_environment ]; then
                . ~/.bash_environment
        fi

        # If the user has a bindir in $HOME, put it in front of the path.
        athena_home_bin=$( /usr/bin/athdir "$HOME" )
        PATH=${athena_home_bin:+$athena_home_bin:}$PATH
        unset athena_home_bin

fi


# *******************  BASH SETUP   *******************

# Set up standard bash shell initializations

#   alias for re-establishing authentication
renew () { kinit -54 $USER && fsid -a && zctl load /dev/null ; }

if [ "${XSESSION+set}" = set ]; then
        logout () { gnome-session-save --kill --silent; exit; } # logout for X
fi

#   aliases dealing with adding locker programs

setup_tty () {(export SUBJECT="$@"; $SHELL)}
setup_X () {(export SUBJECT="$@"; xterm -title "$@" &)}

if [ -n "$XSESSION" ]; then
   alias setup=setup_X
else
   alias setup=setup_tty
fi

remove () { export SUBJECT="$@"; 
            source $initdir/env_remove.bash; 
            unset SUBJECT; }

if [ -n "$SUBJECT" -a -r $initdir/env_setup.bash ]; then
        source $initdir/env_setup.bash
fi


# All of the bash initializing commands above can be overridden by using
# "unset" or "unalias" commands (or by changing things using "set" or
# "alias" again) in your ~/.bashrc.mine file, which is sourced here.
# ~/.bashsrc.mine is not sourced if the xlogin "Ignore your customizations"
# option was selected to begin the session.

if [ "${NOCALLS+set}" != set -a -r ~/.bashrc.mine ]; then
        . ~/.bashrc.mine
fi