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#!/bin/sh
# SGE Wrapper script to ensure correct environment variables are set
set -e
# For each of SGE_ROOT, SGE_CELL:
# 1) If the environment variable is set; use it
# 2) If not, look in /etc/default/gridengine
# 3) If still nothing, fall back to Debian defaults
DEFAULT_SGE_ROOT=/var/lib/gridengine
DEFAULT_SGE_CELL=default
CONFIG_PATH=/etc/default/gridengine
PROG=`basename $0`
# Save environment variables if we have been given them
# so we can restore them at the end
if [ ! -z "${SGE_ROOT}" ]; then
_SAVED_SGE_ROOT="${SGE_ROOT}"
fi
if [ ! -z "${SGE_CELL}" ]; then
_SAVED_SGE_CELL="${SGE_CELL}"
fi
# Read from our config file, this will set SGE_ROOT and/or SGE_CELL if
# appropriate
if [ -r "${CONFIG_PATH}" ]; then
. "${CONFIG_PATH}"
fi
# If we still don't have anything set, fall back to the Debian defaults
if [ -z "${SGE_ROOT}" ]; then
SGE_ROOT="${DEFAULT_SGE_ROOT}"
fi
if [ -z "${SGE_CELL}" ]; then
SGE_CELL="${DEFAULT_SGE_CELL}"
fi
# If we had some environment variables, these should override
# anything else we were given so clobber it all again
if [ ! -z "${_SAVED_SGE_ROOT}" ]; then
SGE_ROOT="${_SAVED_SGE_ROOT}"
fi
if [ ! -z "${_SAVED_SGE_CELL}" ]; then
SGE_CELL="${_SAVED_SGE_CELL}"
fi
unset _SAVED_SGE_ROOT _SAVED_SGE_CELL
# Make sure we've exported the variables we need to
export SGE_ROOT SGE_CELL
exec /usr/lib/gridengine/${PROG} "$@"
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