Print the characters a font provides

ls-chars.sh

#!/bin/bash
#
# Print all characters a font provides
#
# Example:
#   $ ls-chars devicon
#
# Note:
#   \U in printf is not POSIX standard, therefore we need bash
#
# See also:
#   $ fc-query my-font.ttf
#
# From:
#   https://stackoverflow.com/questions/4458696/finding-out-what-characters-a-given-font-supports
#

for range in $(fc-match --format='%{charset}\n' "$1"); do
    for n in $(seq "0x${range%-*}" "0x${range#*-}"); do
        printf "%04x\n" "$n"
    done
done | while read -r n_hex; do
    count=$((count + 1))
    printf "%-5s\U$n_hex\t" "$n_hex"
    [ $((count % 10)) = 0 ] && printf "\n"
done
printf "\n"