examples/functions/notify.bash

   1 trap _notify CHLD
   2 NOTIFY_ALL=false
   3 unset NOTIFY_LIST
   4 unalias false
   5
   6 false()
   7 {
   8         return 1
   9 }
  10
  11 _notify ()
  12 {
  13         local i j
  14         local newlist=
  15
  16         if $NOTIFY_ALL
  17         then
  18                 return          # let bash take care of this itself
  19         elif [ -z "$NOTIFY_LIST" ]; then
  20                 return
  21         else
  22                 set -- $NOTIFY_LIST
  23                 for i in "$@"
  24                 do
  25                         j=$(jobs -n %$i)
  26                         if [ -n "$j" ]; then
  27                                 echo "$j"
  28                                 jobs -n %$i >/dev/null
  29                         else
  30                                 newlist="newlist $i"
  31                         fi
  32                 done
  33                 NOTIFY_LIST="$newlist"
  34         fi
  35 }
  36
  37 notify ()
  38 {
  39         local i j
  40
  41         if [ $# -eq 0 ]; then
  42                 NOTIFY_ALL=:
  43                 set -b
  44                 return
  45         else
  46                 for i in "$@"
  47                 do
  48                         # turn a valid job spec into a job number
  49                         j=$(jobs $i)
  50                         case "$j" in
  51                         [*)     j=${j%%]*}
  52                                 j=${j#[}
  53                                 NOTIFY_LIST="$NOTIFY_LIST $j"
  54                                 ;;
  55                         esac
  56                 done
  57         fi
  58 }