/etc/X11/Xsession.d/20x11-common_process-args is in x11-common 1:7.7+1ubuntu8.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | # $Id: 20x11-common_process-args 305 2005-07-03 18:51:43Z dnusinow $
# This file is sourced by Xsession(5), not executed.
# read OPTIONFILE
OPTIONS=$(cat "$OPTIONFILE") || true
has_option() {
if [ "${OPTIONS#*
$1}" != "$OPTIONS" ]; then
return 0
else
return 1
fi
}
# Determine how many arguments were provided.
case $# in
0)
# No arguments given; use default behavior.
;;
1)
# One argument given; see what it was.
case "$1" in
failsafe)
# Failsafe session was requested.
if has_option allow-failsafe; then
if [ -e /usr/bin/x-terminal-emulator ]; then
if [ -x /usr/bin/x-terminal-emulator ]; then
exec x-terminal-emulator -geometry +1+1
else
# fatal error
errormsg "unable to launch failsafe X session ---" \
"x-terminal-emulator not executable; aborting."
fi
else
# fatal error
errormsg "unable to launch failsafe X session ---" \
"x-terminal-emulator not found; aborting."
fi
fi
;;
default)
# Default behavior was requested.
;;
*)
# Specific program was requested.
STARTUP_FULL_PATH=$(/usr/bin/which "${1%% *}" || true)
if [ -n "$STARTUP_FULL_PATH" ] && [ -e "$STARTUP_FULL_PATH" ]; then
if [ -x "$STARTUP_FULL_PATH" ]; then
STARTUP="$1"
else
message "unable to launch \"$1\" X session ---" \
"\"$1\" not executable; falling back to default session."
fi
else
message "unable to launch \"$1\" X session ---" \
"\"$1\" not found; falling back to default session."
fi
;;
esac
;;
*)
# More than one argument given; we don't know what to do.
message "unsupported number of arguments ($#); falling back to default" \
"session."
;;
esac
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