Home | History | Annotate | Line # | Download | only in dist
move-if-change revision 1.1.1.1 
      1 #!/bin/sh
      2 # Like mv $1 $2, but if the files are the same, just delete $1.
      3 # Status is zero if successful, nonzero otherwise.
      4 
      5 usage="$0: usage: $0 SOURCE DEST"
      6 
      7 case $# in
      8 2) ;;
      9 *) echo "$usage" >&2; exit 1;;
     10 esac
     11 
     12 for arg in "$1" "$2"; do
     13   case $arg in
     14    -*) echo "$usage" >&2; exit 1;;
     15   esac
     16 done
     17 
     18 if test -r "$2" && cmp -s "$1" "$2"; then
     19   rm -f "$1"
     20 else
     21   mv -f "$1" "$2"
     22 fi
     23