LINUX: Find all executables in $PATH that are likely XWindows (GUI) applications

findXapps.sh

#!/bin/bash

## @author  Jay Goldberg
## @email  jaymgoldberg@gmail.com
## @license  Apache 2.0
## @description  Find all executables in $PATH that are likely XWindows (GUI) applications
## @usage  findXapps.sh
#=======================================================================

# a substring of the dynamically linked library that determines if the exe is an X app
library="libX"
#library="xcb"

testbin() {
  if [[ $(ldd "$1" | grep -i "$library") ]]; then echo "$1";fi
}

# make it available to the bash invocation that happens next
export -f testbin
export library

# this path split does not work with paths that have spaces :(
for path in $(echo $PATH | tr ':' ' '); do
  find "$path" -executable -type f -exec bash -c 'testbin "{}"' \;
done

unset -f testbin
unset library