src/scripts/newer

   1 #! /bin/sh
   2
   3 # Script to determine whether the first file is newer than the second.
   4 # If the first does not exist, the answer is "no";
   5 # if the second does not exist, the answer is "yes";
   6 # otherwise their ages are compared using "find".
   7
   8 if [ $# -ne 2 ]; then
   9   echo "*** Two file names needed for 'newer' ***"
  10   exit 2;
  11 fi
  12
  13 if [ ! -f $1 ]; then exit 1; fi
  14 if [ ! -f $2 ]; then exit 0; fi
  15
  16 case `find $1 -newer $2 -print` in
  17 '')     exit 1;;
  18 *)      exit 0;;
  19 esac
  20
  21 # End