user-tools/singleinstance

   1 #!/bin/sh
   2
   3 if [ $# -lt 2 ]
   4 then
   5         echo "Usage: singleinstance <LOCKFILE> <COMMAND> [<ARGS>]" >&2
   6         exit 1
   7 fi
   8
   9 set -e
  10
  11 lockpidfile=$1
  12 shift
  13
  14 exec flock --exclusive --nonblock --no-fork "$lockpidfile" withpidfile "$lockpidfile" "$@"