release/src/router/others/cru

   1 #!/bin/sh
   2 D="/var/spool/cron/crontabs"
   3 U="$D/cron.update"
   4 F="$D/root"
   5 N="$F.new"
   6 L="/var/lock/cron.lock"
   7
   8 if [ $# -gt 1 -a "$1" = "a" -o "$1" = "d" ]; then
   9         I=$((($$ % 25) + 5))
  10         while ! rm $L 2>/dev/null; do
  11                 I=$(($I - 1))
  12                 [ $I -lt 0 ] && break
  13                 sleep 1
  14         done
  15
  16         ID=$2
  17         grep -v "#$ID#\$" $F >$N 2>/dev/null
  18         if [ "$1" = "a" ]; then
  19                 shift
  20                 shift
  21                 echo "$* #$ID#" >>$N
  22         fi
  23         mv $N $F
  24         echo root >>$U
  25
  26         echo >$L
  27         exit 0
  28 fi
  29
  30 if [ "$1" = "l" ]; then
  31         cat $F 2>/dev/null
  32         exit 0
  33 fi
  34
  35 cat <<END
  36
  37 Cron Utility
  38 add:    cru a <unique id> <"min hour day month week command">
  39 delete: cru d <unique id>
  40 list:   cru l
  41
  42 END
  43 exit 0