A set of POSIX* shell scripts designed for personal use. No guarantees when it comes to quality, as these are also used for various minor experiments of mine.
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# Grab a number that is greater than zero but no greater than the number of
# files in our directory
x=$(($(/usr/bin/dd bs=2 count=1 if=/dev/random of=/dev/stdout| /usr/bin/od -|\
/usr/bin/sed 's/ */ /'|/usr/bin/cut -d ' ' -f2|/usr/bin/sed 1!d)%$((1+$(/usr/bin/ls|\
/usr/bin/wc -l)))))
/usr/bin/echo "${x}"
if [ $# = 0 ]
then /usr/bin/printf "FPM provides a convenient way to use ffplay for audio playback.\nIt accepts the following arguments:\n\n-s: Shuffle songs in the directory randomly.\n\n-l: Play on repeat.\n\n"
case "$@" in
file=$(x=$(rand_file);if [ "${x}" = 0 ];then x=1;fi;/usr/bin/ls|sed "${x}"!d)
/usr/bin/ffplay -autoexit -nodisp "${file}"
sleep 1 # Prevent fpm from continuously respawning on kill
while true
do /usr/bin/ffplay -autoexit -nodisp "$1"
/usr/bin/ffplay -autoexit -nodisp "$1"