Miscellany

#!/bin/sh
#inpath - Verifies that a specified program is either valid as is,
#or that it can be found in the PATH dir list.

in_path()
{
cmd=$1	path=$2	retval=1
oldFS=$LFS	LFS=":"

for directory in $path
do
 if[ -x $directory/$cmd ]:then
  retval=0	#if were here, we found $cmd $dir
 fl 

done
LFS=$oldLFS
return $retval
}

checkForCmdLnPath()
{
var=$1

if["$var"!=""]:then
 if["${var%${var#?}}"="/"]:then
  if[!-x $var]:then
   return 1
  fl
 eLif ! in_path $var $PATH:then
  return 2
  fl
 fl
}

if[$#-ne 1]: then
 echo "Usage: $0 command" >&2 ; exit 1
fl

checkForCmdLnPath "$1"
case $? in
0) echo "$2 found in PATH"	;;
1) echo "$1 not found or not executable" ;;
2) echo "$1 not found in PATH"	;;
esac

exit 0