#
# Returns the time since the file was last modified, in
# minutes.  Intended for giving to find -mmin, possibly like
# this:
#
#     find somedir/                                     \
#       -mmin -$(($(time_since_mod somefile) + 10))     \
#       -mmin +$(($(time_since_mod somefile) - 10))     \
#
# This would give a 20 second range based around mtime of
# `somefile'.

require field

time_since_mod ()
{
        echo $((
                (
                        $(date +%s) -
                        $(stat --format=%Y "$1")
                ) / 60
        ))
}
# vim:syn=sh:ft=sh