Marc S. Weidner
dcd3680077
All checks were successful
🛡️ Shell Script Linting / 🛡️ Shell Script Linting (push) Successful in 1m52s
Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
158 lines
4.4 KiB
Bash
158 lines
4.4 KiB
Bash
#!/bin/bash
|
|
# SPDX-Version: 3.0
|
|
# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
|
|
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
|
|
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
|
|
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
|
|
# SPDX-FileType: SOURCE
|
|
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
|
|
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
|
|
# SPDX-PackageName: CISS.debian.installer
|
|
# SPDX-Security-Contact: security@coresecret.eu
|
|
|
|
guard_sourcing || return "${ERR_GUARD_SOURCE}"
|
|
|
|
#######################################
|
|
# Converts the value of a passed variable to lowercase.
|
|
# Example:
|
|
# ensure_lowercase "VAR"
|
|
# Globals:
|
|
# None
|
|
# Arguments:
|
|
# 1: VARIABLE name only
|
|
# Returns:
|
|
# 0: on success
|
|
# ERR_UNBOUND_VARIABLE
|
|
#######################################
|
|
ensure_lowercase() {
|
|
declare -r name="$1"
|
|
if ! declare -p "${name}" &>/dev/null; then
|
|
do_log "emergency" "file_only" "0008() Unbound variable: [${name}]."
|
|
return "${ERR_UNBOUND_VARIABLE}"
|
|
fi
|
|
declare -n ref="${name}"
|
|
ref="${ref,,}"
|
|
return 0
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f ensure_lowercase
|
|
|
|
#######################################
|
|
# Converts the value of a passed variable to uppercase.
|
|
# Example:
|
|
# ensure_uppercase "VAR"
|
|
# Globals:
|
|
# None
|
|
# Arguments:
|
|
# 1: VARIABLE name only
|
|
# Returns:
|
|
# 0: on success
|
|
# ERR_UNBOUND_VARIABLE
|
|
#######################################
|
|
ensure_uppercase() {
|
|
declare -r name="$1"
|
|
if ! declare -p "${name}" &>/dev/null; then
|
|
do_log "emergency" "file_only" "0008() Unbound variable: [${name}]."
|
|
return "${ERR_UNBOUND_VARIABLE}"
|
|
fi
|
|
declare -n ref="${name}"
|
|
ref="${ref^^}"
|
|
return 0
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f ensure_uppercase
|
|
|
|
#######################################
|
|
# Removes leading and trailing spaces in the value.
|
|
# Example:
|
|
# ensure_trimmed "VAR"
|
|
# Globals:
|
|
# None
|
|
# Arguments:
|
|
# 1: VARIABLE name only
|
|
# Returns:
|
|
# 0: on success
|
|
# ERR_UNBOUND_VARIABLE
|
|
#######################################
|
|
ensure_trimmed() {
|
|
declare -r name="$1"
|
|
if ! declare -p "${name}" &>/dev/null; then
|
|
do_log "emergency" "file_only" "0008() Unbound variable: [${name}]."
|
|
return "${ERR_UNBOUND_VARIABLE}"
|
|
fi
|
|
declare -n ref="${name}"
|
|
ref="${ref#"${ref%%[![:space:]]*}"}"
|
|
ref="${ref%"${ref##*[![:space:]]}"}"
|
|
return 0
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f ensure_trimmed
|
|
|
|
#######################################
|
|
# Resets the value of the variable to a default value if it is empty or contains only whitespace.
|
|
# Example:
|
|
# reset_to_default "VAR" "fallback"
|
|
# Globals:
|
|
# None
|
|
# Arguments:
|
|
# 1: VARIABLE name only
|
|
# 2: Fallback value
|
|
# Returns:
|
|
# 0: on success
|
|
# ERR_UNBOUND_VARIABLE
|
|
#######################################
|
|
reset_to_default() {
|
|
declare -r name="$1"
|
|
declare -r fallback="$2"
|
|
if ! declare -p "${name}" &>/dev/null; then
|
|
do_log "emergency" "file_only" "0008() Unbound variable: [${name}]."
|
|
return "${ERR_UNBOUND_VARIABLE}"
|
|
fi
|
|
declare -n ref="${name}"
|
|
declare trimmed="${ref#"${ref%%[![:space:]]*}"}"
|
|
trimmed="${trimmed%"${trimmed##*[![:space:]]}"}"
|
|
if [[ -z "${trimmed}" ]]; then
|
|
ref="${fallback}"
|
|
fi
|
|
return 0
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f reset_to_default
|
|
|
|
#######################################
|
|
# Checks whether the content of a variable matches a specific regex.
|
|
# Example:
|
|
# assert_match "FOO" '^[a-z0-9_-]+$'
|
|
# Globals:
|
|
# None
|
|
# Arguments:
|
|
# 1: VARIABLE name only
|
|
# 2: Regex in 'single quotes'
|
|
# Returns:
|
|
# 0: on success
|
|
# ERR_UNBOUND_VARIABLE
|
|
# ERR_VAR_REGEX_CHK
|
|
#######################################
|
|
assert_match() {
|
|
declare -r name="$1"
|
|
declare -r pattern="$2"
|
|
if ! declare -p "${name}" &>/dev/null; then
|
|
do_log "emergency" "file_only" "0008() Unbound variable: [${name}]."
|
|
return "${ERR_UNBOUND_VARIABLE}"
|
|
fi
|
|
declare -n ref="${name}"
|
|
if ! [[ "${ref}" =~ ${pattern} ]]; then
|
|
do_log "emergency" "file_only" "0008() Variable: [${name}] not matching Regex: [${pattern}]: [${ref}]."
|
|
return "${ERR_VAR_REGEX_CHK}"
|
|
fi
|
|
return 0
|
|
}
|
|
### Prevents accidental 'unset -f'.
|
|
# shellcheck disable=SC2034
|
|
readonly -f assert_match
|
|
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
|