194 lines
4.7 KiB
Bash
194 lines
4.7 KiB
Bash
#!/bin/bash
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# Copyright Broadcom, Inc. All Rights Reserved.
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# SPDX-License-Identifier: APACHE-2.0
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#
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# Library for file system actions
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# shellcheck disable=SC1091
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# Load Generic Libraries
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. /opt/bitnami/scripts/liblog.sh
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# Functions
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########################
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# Ensure a file/directory is owned (user and group) but the given user
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# Arguments:
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# $1 - filepath
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# $2 - owner
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# Returns:
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# None
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#########################
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owned_by() {
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local path="${1:?path is missing}"
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local owner="${2:?owner is missing}"
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local group="${3:-}"
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if [[ -n $group ]]; then
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chown "$owner":"$group" "$path"
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else
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chown "$owner":"$owner" "$path"
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fi
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}
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########################
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# Ensure a directory exists and, optionally, is owned by the given user
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# Arguments:
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# $1 - directory
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# $2 - owner
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# Returns:
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# None
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#########################
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ensure_dir_exists() {
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local dir="${1:?directory is missing}"
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local owner_user="${2:-}"
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local owner_group="${3:-}"
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[ -d "${dir}" ] || mkdir -p "${dir}"
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if [[ -n $owner_user ]]; then
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owned_by "$dir" "$owner_user" "$owner_group"
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fi
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}
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########################
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# Checks whether a directory is empty or not
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# arguments:
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# $1 - directory
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# returns:
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# boolean
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#########################
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is_dir_empty() {
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local -r path="${1:?missing directory}"
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# Calculate real path in order to avoid issues with symlinks
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local -r dir="$(realpath "$path")"
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if [[ ! -e "$dir" ]] || [[ -z "$(ls -A "$dir")" ]]; then
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true
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else
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false
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fi
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}
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########################
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# Checks whether a mounted directory is empty or not
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# arguments:
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# $1 - directory
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# returns:
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# boolean
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#########################
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is_mounted_dir_empty() {
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local dir="${1:?missing directory}"
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if is_dir_empty "$dir" || find "$dir" -mindepth 1 -maxdepth 1 -not -name ".snapshot" -not -name "lost+found" -exec false {} +; then
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true
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else
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false
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fi
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}
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########################
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# Checks whether a file can be written to or not
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# arguments:
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# $1 - file
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# returns:
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# boolean
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#########################
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is_file_writable() {
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local file="${1:?missing file}"
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local dir
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dir="$(dirname "$file")"
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if [[ (-f "$file" && -w "$file") || (! -f "$file" && -d "$dir" && -w "$dir") ]]; then
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true
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else
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false
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fi
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}
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########################
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# Relativize a path
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# arguments:
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# $1 - path
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# $2 - base
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# returns:
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# None
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#########################
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relativize() {
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local -r path="${1:?missing path}"
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local -r base="${2:?missing base}"
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pushd "$base" >/dev/null || exit
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realpath -q --no-symlinks --relative-base="$base" "$path" | sed -e 's|^/$|.|' -e 's|^/||'
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popd >/dev/null || exit
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}
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########################
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# Configure permisions and ownership recursively
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# Globals:
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# None
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# Arguments:
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# $1 - paths (as a string).
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# Flags:
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# -f|--file-mode - mode for directories.
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# -d|--dir-mode - mode for files.
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# -u|--user - user
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# -g|--group - group
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# Returns:
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# None
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#########################
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configure_permissions_ownership() {
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local -r paths="${1:?paths is missing}"
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local dir_mode=""
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local file_mode=""
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local user=""
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local group=""
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# Validate arguments
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shift 1
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while [ "$#" -gt 0 ]; do
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case "$1" in
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-f | --file-mode)
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shift
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file_mode="${1:?missing mode for files}"
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;;
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-d | --dir-mode)
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shift
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dir_mode="${1:?missing mode for directories}"
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;;
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-u | --user)
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shift
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user="${1:?missing user}"
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;;
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-g | --group)
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shift
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group="${1:?missing group}"
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;;
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*)
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echo "Invalid command line flag $1" >&2
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return 1
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;;
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esac
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shift
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done
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read -r -a filepaths <<<"$paths"
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for p in "${filepaths[@]}"; do
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if [[ -e "$p" ]]; then
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find -L "$p" -printf ""
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if [[ -n $dir_mode ]]; then
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find -L "$p" -type d ! -perm "$dir_mode" -print0 | xargs -r -0 chmod "$dir_mode"
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fi
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if [[ -n $file_mode ]]; then
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find -L "$p" -type f ! -perm "$file_mode" -print0 | xargs -r -0 chmod "$file_mode"
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fi
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if [[ -n $user ]] && [[ -n $group ]]; then
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find -L "$p" -print0 | xargs -r -0 chown "${user}:${group}"
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elif [[ -n $user ]] && [[ -z $group ]]; then
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find -L "$p" -print0 | xargs -r -0 chown "${user}"
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elif [[ -z $user ]] && [[ -n $group ]]; then
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find -L "$p" -print0 | xargs -r -0 chgrp "${group}"
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fi
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else
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stderr_print "$p does not exist"
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fi
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done
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}
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