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#!/bin/sh
in_path() {
cmd=$1 path=$2 res=1
IFS=":"
for dir in $path; do
if [ -x "$dir/$cmd" ]; then
res=0
break
fi
done
return $res
}
cmd_in_path() {
var=$1
if [ -n "$var" ]; then
if [ "$(echo "$var" | cut -c 1)" = "/" ]; then
if [ ! -x "$var" ]; then
return 1
fi
elif ! in_path "$var" "$PATH"; then
return 2
fi
fi
}
if [ $# -ne 1 ]; then
echo "Usage: $0 <command>" >&2
exit 1
fi
cmd_in_path "$1"
case $? in
0) echo "$1 found in PATH" ;;
1) echo "$1 not found or not executable" ;;
2) echo "$1 not found in PATH" ;;
esac
exit 0
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