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#!/bin/sh

# Slackware init script to start/stop/restart nvidia-fabricmanager.

# Copyright 2024 GUAN Xin <guanx.bac@gmail.com> from Beijing
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

EXE="/usr/bin/nv-fabricmanager"
CFG="/usr/share/nvidia/nvswitch/fabricmanager.cfg"
CMD="$EXE -c $CFG"

# Start nvidia-fabricmanager:
fabricmanager_start() {
  PID=`pgrep -f "$CMD"`
  if [ $PID -gt 0 ] 2>/dev/null; then
    echo "nvidia-fabricmanager is already running as PID $PID" >&2
    exit 3
  elif [ -x $EXE ]; then
    echo "Starting nvidia-fabricmanager:  $CMD"
    $CMD
  fi
}

# Stop nvidia-fabricmanager:
fabricmanager_stop() {
  PID=`pgrep -f "$CMD"`
  if [ $PID -gt 0 ] 2>/dev/null; then
    printf 'Stopping nvidia-fabricmanager (PID %d).' $PID
    kill $PID
    timeout 10 tail --pid=$PID -f /dev/null
    if [ $? -eq 124 ]; then
      echo " Timeout."
      exit 124
    fi
    echo
  fi
}

# Restart nvidia-fabricmanager:
fabricmanager_restart() {
  fabricmanager_stop
  fabricmanager_start
}

case "$1" in
'start')
  fabricmanager_start
  ;;
'stop')
  fabricmanager_stop
  ;;
'restart')
  fabricmanager_restart
  ;;
*)
  echo "usage $0 start|stop|restart"
  exit 2
esac