runnable

   1 #!/bin/sh
   2 # Returns 0 (success) if the given program is runnable.
   3 #
   4 # This is better than using [ -x /usr/bin/program ] because it avoids
   5 # the need to hardcode the program's path; it searches $PATH instead.
   6 #
   7 if [ $# != 1 ]; then
   8   echo "usage: $0 <programname>" >&2
   9   exit 1
  10 fi
  11 type "$1" >/dev/null 2>&1