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Dir : ~/usr/local/psa/admin/sbin/modules/ntp-timesync/

Edit File: package-mng.sh

#!/usr/bin/env bash
### Copyright 1999-2024. WebPros International GmbH. All rights reserved.

PACKAGE_MANAGER=""

present() {
    local package="$1"

case "$PACKAGE_MANAGER" in
        apt)
            if apt show "$package" >/dev/null 2>&1; then
                echo "true"
                return
            fi
        ;;
        dnf)
            if dnf list "$package" >/dev/null 2>&1; then
                echo "true"
                return
            fi
        ;;
        yum)
            if yum list "$package" >/dev/null 2>&1; then
                echo "true"
                return
            fi
        ;;
    esac

echo "false"
}

known_unit() {
    # CentOS 7.0 and 7.1 probably don't have this feature
    local service="$1"

if systemctl cat "${service}.service"; then
        echo "true"
        return
    fi

echo "false"
}

find_package_manager() {
    if command -v apt >/dev/null 2>&1; then
        PACKAGE_MANAGER="apt"
        return 0
    fi

if command -v dnf >/dev/null 2>&1; then
        PACKAGE_MANAGER="dnf"
        return 0
    fi

if command -v yum >/dev/null 2>&1; then
        PACKAGE_MANAGER="yum"
        return 0
    fi

return 1
}

main() {
    if ! find_package_manager; then
        echo "Unknown package manager" >&2
        exit 1
    fi

case "$1" in
        is-present)
            present "${2:?'Package name must be specified as second parameter'}"
        ;;
        is-known-unit)
            known_unit "${2:?'Service name must be specified as second parameter'}"
        ;;
       *)
            echo "Unknown command ${1}" >&2
            exit 1
    esac
}

main "$@"