user-tools/override/write

   1 #!/bin/bash
   2
   3 true <<EOF
   4 =pod
   5
   6 =head1 NAME
   7
   8 write - Wrapper for bsd-write, write(1), write to all terminals of the given user
   9
  10 =cut
  11
  12 EOF
  13
  14
  15 declare -a opts=()
  16 declare -a args=()
  17 user=''
  18 all_tty=''
  19
  20 while [ $# -gt 0 ]
  21 do
  22         case "$1" in
  23         -h|--help)
  24                 echo "usage: write [--all-tty] [<user>]"
  25                 /usr/bin/write --help
  26                 exit
  27                 ;;
  28         --all-tty)
  29                 all_tty=1
  30                 ;;
  31         -*)
  32                 opts+=("$1")
  33                 ;;
  34         *)
  35                 args+=("$1")
  36
  37                 if [ -z "$user" ]
  38                 then
  39                         user=$1
  40                 fi
  41                 ;;
  42         esac
  43         shift
  44 done
  45
  46 if [ "$all_tty" ]
  47 then
  48         message=`cat`
  49
  50         for tty in `utmp | awk -v user="$user" '$3 == user {print $2}'`
  51         do
  52                 if [ -e "/dev/$tty" ]
  53                 then
  54                         echo "write: writing message on $tty" >&2
  55                         /usr/bin/write "${opts[@]}" "$user" "$tty" <<< "$message"
  56                 fi
  57         done
  58 else
  59         exec /usr/bin/write "${opts[@]}" "${args[@]}"
  60 fi