#!/bin/bash
#
# This is SORT OF LIKE an X session, but not quite. You get a command as the
# first argument (it could be multiple words, so run it with "eval"). As a
# special case, the command can be:
# default - Run the appropriate Xclients startup (see the code below)
# custom - Run ~/.xsession and if that's not available run 'default'
#
# (Note that other arguments could also follow, but only the command one is
# right now relevant and supported)
#
# The output is ALREADY redirected to .xsession-errors in GDM. This way
# .xsession-errors actually gets more output such as if the PreSession script
# is failing. This also prevents DoS attacks if some app in the users session
# can be prodded to dump lots of stuff on the stdout/stderr. We wish to be
# robust don't we? In case you wish to use an existing script for other DM's,
# you can just not redirect when GDMSESSION is set. GDMSESSION will always
# be set from gdm.
#
# Also note that this is not run as a login shell, this is just executed.
# This is why we source the profile files below.
#
# based on:
# $XConsortium: Xsession /main/10 1995/12/18 18:21:28 gildea $
command="$@"
# this will go into the .xsession-errors along with all other echo's
# good for debugging where things went wrong
echo "$0: Beginning session setup..."
# temporary storage of error messages
ERR=$(mktemp --tmpdir gdm3-config-err-XXXXXX)
source_with_error_check () {
CONFIG_FILE="$1"
. "$CONFIG_FILE" 2>"$ERR"
if [ -s "$ERR" ]; then
. /etc/gdm3/config-error-dialog.sh
fi
cat "$ERR" >&2
truncate -s 0 "$ERR"
}
# First read /etc/profile (resp. /usr/etc/profile) and .profile
if [ -f /etc/profile ]; then
source_with_error_check /etc/profile
elif [ -f /usr/etc/profile ]; then
source_with_error_check /usr/etc/profile
fi
if [ -f "$HOME/.profile" ]; then
source_with_error_check "$HOME/.profile"
fi
# Second read /etc/xprofile (resp. /usr/etc/xprofile) and .xprofile for X specific setup
if [ -f /etc/xprofile ]; then
source_with_error_check /etc/xprofile
elif [ -f /usr/etc/xprofile ]; then
source_with_error_check /usr/etc/xprofile
fi
if [ -f "$HOME/.xprofile" ]; then
source_with_error_check "$HOME/.xprofile"
fi
# Translation stuff
if [ -x "/usr/libexec/gdmtranslate" ] ; then
gdmtranslate="/usr/libexec/gdmtranslate"
else
gdmtranslate=
fi
# Note that this should only go to zenity dialogs which always expect utf8
gettextfunc () {
if [ "x$gdmtranslate" != "x" ] ; then
"$gdmtranslate" --utf8 "$1"
else
echo "$1"
fi
}
OLD_IFS=$IFS
gdmwhich () {
COMMAND="$1"
OUTPUT=
IFS=:
for dir in $PATH
do
if test -x "$dir/$COMMAND" ; then
if test "x$OUTPUT" = "x" ; then
OUTPUT="$dir/$COMMAND"
fi
fi
done
IFS=$OLD_IFS
echo "$OUTPUT"
}
zenity=`gdmwhich zenity`
# Note: ~/.xsession-errors is now done in the daemon so that it
# works for ALL sessions (except ones named 'Failsafe')
# clean up after xbanner
freetemp=`gdmwhich freetemp`
if [ -n "$freetemp" ] ; then
"$freetemp"
fi
userresources="$HOME/.Xresources"
usermodmap="$HOME/.Xmodmap"
userxkbmap="$HOME/.Xkbmap"
if [ -f /etc/X11/Xresources ]; then
sysresources=/etc/X11/Xresources
else
sysresources=/usr/etc/X11/Xresources
fi
if [ -f /etc/X11/Xmodmap ]; then
sysmodmap=/etc/X11/Xmodmap
else
sysmodmap=/usr/etc/X11/Xmodmap
fi
if [ -f /etc/X11/Xkbmap ]; then
sysxkbmap=/etc/X11/Xkbmap
else
sysxkbmap=/usr/etc/X11/Xkbmap
fi
rh6sysresources=/etc/X11/xinit/Xresources
rh6sysmodmap=/etc/X11/xinit/Xmodmap
# merge in defaults
if [ -f "$rh6sysresources" ]; then
xrdb -nocpp -merge "$rh6sysresources"
fi
if [ -f "$sysresources" ]; then
xrdb -nocpp -merge "$sysresources"
elif [ -d "$sysresources" ]; then
# directory of Xresources files on Debian/Ubuntu
for i in `ls "$sysresources"` ; do
if [ -r "$sysresources/$i" -a -f "$sysresources/$i" ] && expr "$i" : '^[[:alnum:]_-]\+$' > /dev/null; then
xrdb -nocpp -merge "$sysresources/$i"
fi
done
fi
if [ -f "$userresources" ]; then
xrdb -nocpp -merge "$userresources"
fi
# merge in keymaps
if [ -f "$sysxkbmap" ]; then
setxkbmap `cat "$sysxkbmap"`
XKB_IN_USE=yes
fi
if [ -f "$userxkbmap" ]; then
setxkbmap `cat "$userxkbmap"`
XKB_IN_USE=yes
fi
#
# Eeek, this seems like too much magic here
#
if [ -z "$XKB_IN_USE" -a ! -L /etc/X11/X ]; then
if grep '^exec.*/Xsun' /etc/X11/X > /dev/null 2>&1 && [ -f /etc/X11/XF86Config ]; then
xkbsymbols=`sed -n -e 's/^[ ]*XkbSymbols[ ]*"\(.*\)".*$/\1/p' /etc/X11/XF86Config`
if [ -n "$xkbsymbols" ]; then
setxkbmap -symbols "$xkbsymbols"
XKB_IN_USE=yes
fi
fi
fi
# xkb and xmodmap don't play nice together
if [ -z "$XKB_IN_USE" ]; then
if [ -f "$rh6sysmodmap" ]; then
xmodmap "$rh6sysmodmap"
fi
if [ -f "$sysmodmap" ]; then
xmodmap "$sysmodmap"
fi
if [ -f "$usermodmap" ]; then
xmodmap "$usermodmap"
fi
fi
unset XKB_IN_USE
xhost +si:localuser:`id -un` || :
# run all system xinitrc shell scripts.
if [ -d /usr/etc/X11/xinit/xinitrc.d ]; then
for i in /usr/etc/X11/xinit/xinitrc.d/* ; do
sname=$(basename "$i")
test -x "/etc/X11/xinit/xinitrc.d/$sname" && continue
if [ -x "$i" -a ! -d "$i" ]; then
. "$i"
fi
done
fi
if [ -d /etc/X11/xinit/xinitrc.d ]; then
for i in /etc/X11/xinit/xinitrc.d/* ; do
if [ -x "$i" -a ! -d "$i" ]; then
. "$i"
fi
done
fi
# run /etc/X11/Xsession.d/
OPTIONFILE=/etc/X11/Xsession.options
USERXSESSION=$HOME/.xsession
USERXSESSIONRC=$HOME/.xsessionrc
ALTUSERXSESSION=$HOME/.Xsession
if [ -d /etc/X11/Xsession.d ]; then
for i in `ls /etc/X11/Xsession.d/` ; do
if [ -r "/etc/X11/Xsession.d/$i" -a -f "/etc/X11/Xsession.d/$i" ] && expr "$i" : '^[[:alnum:]_-]\+$' > /dev/null; then
. "/etc/X11/Xsession.d/$i"
fi
done
fi
if [ "x$command" = "xdefault" ] ; then
if [ -x "$HOME/.Xclients" ]; then
command="$HOME/.Xclients"
elif [ -x /etc/X11/xinit/Xclients ]; then
command="/etc/X11/xinit/Xclients"
elif [ -x /etc/X11/Xclients ]; then
command="/etc/X11/Xclients"
else
if [ -n "$zenity" ] ; then
disptext=`gettextfunc "System has no Xclients file, so starting a failsafe xterm session. Windows will have focus only if the mouse pointer is above them. To get out of this mode type 'exit' in the window."`
"$zenity" --info --text "$disptext"
else
echo "$0: Cannot find Xclients"
fi
exec xterm -geometry 80x24+0+0
fi
fi
# add ssh-agent if found
sshagent="`gdmwhich ssh-agent`"
if [ -n "$sshagent" ] && [ -x "$sshagent" ] && [ -z "$SSH_AUTH_SOCK" ]; then
command="$sshagent -- $command"
elif [ -z "$sshagent" ] ; then
echo "$0: ssh-agent not found!"
fi
echo "$0: Setup done, will execute: $command"
eval exec $command
echo "$0: Executing $command failed, will run x-terminal-emulator"
if [ -n "$zenity" ] ; then
disptext=`gettextfunc "Failed to start the session, so starting a failsafe terminal session. Windows will have focus only if the mouse pointer is above them. To get out of this mode type 'exit' in the window."`
"$zenity" --info --text "$disptext"
fi
exec x-terminal-emulator -geometry 80x24+0+0
Mini Shell