nsxiv/etc/examples/thumb-info

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#!/bin/sh
# Example for $XDG_CONFIG_HOME/nsxiv/exec/thumb-info
# Called by nsxiv(1) whenever the selected thumbnail changes.
# The output is displayed in nsxiv's status bar.
# Arguments:
# $1: path to image file (as provided by the user)
# $2: empty
# $3: empty
# $4: fully resolved path to the image file
s=" " # field separator
exec 2>/dev/null
filename=$(basename -- "$4")
filesize=$(du -Hh -- "$4" | cut -f 1)
echo "${filesize}${s}${filename}"