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space.sh
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space.sh
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#!/usr/bin/env bash
##
## space - list available storage space of relevant devices
## Copyright (C) 2023 Daniel Haase
##
## 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/gpl.txt>.
##
# shellcheck disable=SC2310
set -o errexit
set -o nounset
set -o pipefail
set -o noclobber
NAME="space"
VERSION="0.4.0"
function check_command {
if ! command -v "${1}" &>/dev/null; then
echo >&2 "no such command \"${1}\""
exit 1
fi
}
function print_version {
cat <<-EOF
${NAME} ${VERSION}
copyright (c) 2023 Daniel Haase
EOF
}
function print_usage {
print_version
cat <<-EOF
usage: ${NAME} [--version | --help]
-V | --version
print version information and exit
-h | --help
print this usage description and exit
EOF
}
function print_space {
local expression="/dev/((sd[a-z][0-9]+)|(nvme[0-9]+n[0-9]+)|"
expression+="(mmcblk[0-9]+p[0-9]+))"
local -r mmc_regex="\/dev\/mmcblk[0-9]p[0-9]"
local -r columns_3=" \+.\+ \+.\+ \+.\+ \+"
local -r columns_4=".\+${columns_3}"
df --human-readable --local --output=source,avail,target |
grep --perl-regexp "${expression}" |
awk '{ print $1" "$0 }' |
sed --expression="s/\(${columns_4}\)\/\$/\1 [root]/g" \
--expression="s/\/home\$/ [home]/" \
--expression="s/\/\(boot\)\|\(efi\).*\$/ [boot]/" \
--expression="s/\(${mmc_regex}${columns_3}\)/\1 [sdcard]/" \
--expression="s/\/mnt.*/ [usb]/" \
--expression="s/\(${columns_4}\)\/.\+\$/\1 [other]/g" |
awk '{ printf "%-17s %8s: %7s\n", $2, $4, $3 }'
}
check_command "awk"
check_command "cat"
check_command "df"
check_command "grep"
check_command "sed"
if [[ $# -eq 1 ]]; then
case "${1}" in
-V | --version)
print_version
exit 0
;;
-h | --help)
print_usage
exit 0
;;
*)
print_usage
exit 2
;;
esac
elif [[ $# -gt 1 ]]; then
print_usage
exit 2
fi
if ! print_space 2>/dev/null; then
echo >&2 "operation failed"
exit 3
fi
exit 0