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mounts.sh
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mounts.sh
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#!/usr/bin/env bash
## mounts - list relevant file system mounts, nicely formatted
## Copyright (C) 2020-2023 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="mounts"
VERSION="0.3.2"
function check_command {
if ! command -v "${1}" &>/dev/null; then
echo "no such command \"${1}\""
exit 1
fi
}
function print_version {
cat <<-EOF
${NAME} ${VERSION}
copyright (c) 2020-2023 Daniel Haase
EOF
}
function print_usage {
print_version
cat <<-EOF
usage: ${NAME} [--sort | --version | --help]
-s | --sort
sort output lexicographically by device name
-V | --version
print version information and exit
-h | --help
print this usage description and exit
EOF
}
function print_mounts {
local -r sort_command="${1}"
local awk_script="/\/dev\/(sd|nvme|mmc)/ { "
awk_script+="printf \"%-16s as %-8s on %s\n\", "
awk_script+="\$1, \$5, \$3 }"
mount | "${sort_command}" | awk "${awk_script}"
} 2>/dev/null
check_command "awk"
check_command "cat"
check_command "mount"
check_command "sort"
declare sort_command="cat"
if [[ $# -eq 1 ]]; then
case "${1}" in
-s | --sort)
sort_command="sort"
;;
-V | --version)
print_version
exit 0
;;
-h | --help)
print_usage
exit 0
;;
*)
print_usage
exit 2
;;
esac
elif [[ $# -gt 1 ]]; then
print_usage
exit 2
fi
if ! print_mounts "${sort_command}"; then
echo "operation failed"
exit 3
fi
exit 0