init

.config/i3blocks/disk/README.md

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+# disk
+
+Show disk usage. The directory defaults to $HOME if the instance is not
+specified. The script may be called with an optional argument to set the
+alert (defaults to 10 for 10%).
+The script also accepts the flag `-n` to allow checking the disk usage of network devices, 
+which is disabled by default.
+
+
+# Config
+
+```
+[disk]
+command=$SCRIPT_DIR/disk
+LABEL=HOME 
+#DIR=$HOME
+#ALERT_LOW=10
+interval=30
+```

.config/i3blocks/disk/disk

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+#!/usr/bin/env sh
+# Copyright (C) 2014 Julien Bonjean <julien@bonjean.info>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+DIR="${DIR:-$BLOCK_INSTANCE}"
+DIR="${DIR:-$HOME}"
+ALERT_LOW="${ALERT_LOW:-$1}"
+ALERT_LOW="${ALERT_LOW:-10}" # color will turn red under this value (default: 10%)
+
+LOCAL_FLAG="-l"
+if [ "$1" = "-n" ] || [ "$2" = "-n" ]; then
+    LOCAL_FLAG=""
+fi
+
+df -h -P $LOCAL_FLAG "$DIR" | awk -v label="$LABEL" -v alert_low=$ALERT_LOW '
+/\/.*/ {
+	# full text
+	print label $4
+
+	# short text
+	print label $4
+
+	use=$5
+
+	# no need to continue parsing
+	exit 0
+}
+
+END {
+	gsub(/%$/,"",use)
+	if (100 - use < alert_low) {
+		# color
+		print "#FF0000"
+	}
+}
+'

.config/i3blocks/disk/i3blocks.conf

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+[disk]
+command=$SCRIPT_DIR/disk
+LABEL=HOME 
+#DIR=/mnt/data
+interval=30