50 lines
1.8 KiB
Bash
50 lines
1.8 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.installer
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# SPDX-Security-Contact: security@coresecret.eu
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guard_sourcing
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#######################################
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# Unbound Variable Check.
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# Globals:
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# ERR_UNBOUND_VARIABLE
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# GRE
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# NL
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# RED
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# RES
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# Arguments:
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# 1: VAR_NAME to check NOT the variable itself.
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# Returns:
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# ERR_UNBOUND_VARIABLE
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#######################################
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check_var() {
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declare var_name_to_check="$1"
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### First check: Is the passed-in variable name itself set?
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if ! [[ -v var_name_to_check ]]; then
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printf "%b❌ Error: Variable NOT set: '%s'. Exiting Script. %b%b" "${RED}" "${var_name_to_check}" "${RES}" "${NL}" >&2
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return "${ERR_UNBOUND_VARIABLE}"
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fi
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### Second check: Is the variable referenced by var_name_to_check declared?
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if [[ -v "${var_name_to_check}" ]]; then
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if [[ -n "${!var_name_to_check}" ]]; then
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printf "%b✅ Variable: '%s' exists and is NOT empty: '%s'. %b%b" "${GRE}" "${var_name_to_check}" "${!var_name_to_check}" "${RES}" "${NL}"
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else
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printf "%b✅ Variable: '%s' exists but is empty. %b%b" "${GRE}" "${var_name_to_check}" "${RES}" "${NL}"
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fi
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else
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printf "%b❌ Error: Variable NOT declared: '%s'. Exiting Script. %b%b" "${RED}" "${var_name_to_check}" "${RES}" "${NL}" >&2
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return "${ERR_UNBOUND_VARIABLE}"
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fi
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}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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