must.sh

must() {
    case "${1}" in
				(have)
						case "${2}" in
								(file) test -f ${3} || err "Missing file: ${3}"                                  ;;
								(link) test -L ${3} || err "Missing symlink: ${3}"                               ;;
								(dir)  test -d ${3} || err "Missing dir: ${3}"                                   ;;
								(prog) which ${3} >/dev/null 2>&1 || err "Missing ${2}: ${3}"                    ;;
								(user) test ! -z "$(grep ${3} /etc/passwd)" || err "Missing ${2}: ${3}"          ;;
								(group) test ! -z "$(grep ${3} /etc/group)" || err "Missing ${2}: ${3}"          ;;
								(pkg)
										case "${QC_DISTRO}" in
												(redhat)
														$(which rpm) -q ${3} >/dev/null 2>&1 || err "Missing ${2}: ${3}"
														;;
												(*) err "This is an unsupported platform."      												 ;;
										esac
										;;
								(*) cat ${QC_BASE_DIR}/help/must-have.txt 2>/dev/null                            ;;
						esac
						;;
				(lack)
						case "${2}" in
								(file) test ! -f ${3} || err "Present file: ${3}"                                ;;
								(link) test ! -L ${3} || err "Present symlink: ${3}"                             ;;
								(dir)  test ! -d ${3} || err "Present dir: ${3}"                                 ;;
								(prog) which ${3} >/dev/null 2>&1 || err "Present ${2}: ${3}"                    ;;
								(user) test -z "$(grep ${3} /etc/passwd)" || err "Present ${2}: ${3}"            ;;
								(group) test -z "$(grep ${3} /etc/group)" || err "Present ${2}: ${3}"            ;;
								(pkg)
										case "${QC_DISTRO}" in
												(redhat)
														($(which rpm) -q ${3} >/dev/null 2>&1 && test $? -ne 0) || err "Present ${2}: ${3}"
														;;
												(*) err "This is an unsupported platform."                               ;;
										esac
										;;
								(*) cat ${QC_BASE_DIR}/help/must-lack.txt 2>/dev/null                            ;;
						esac
						;;
				(be)
						case "${2}" in
								(running)
										if test -x /etc/init.d/${3}; then
												/etc/init.d/${3} status 1>/dev/null 2>/dev/null
												if test $? -ne 0; then
														err "Service (${3}) is not running."
												fi
										else
												err "The service (${3}) is not available."
										fi
										;;
								(stopped)
										if test -x /etc/init.d/${3}; then
												/etc/init.d/${3} status 1>/dev/null 2>/dev/null
												if test $? -eq 0; then
														err "Service (${3}) is still running."
												fi
										else
												info "The service (${3}) is not available."
										fi
										;;
								(enabled)
										case "${QC_DISTRO}" in
												(redhat) test -z "$(chkconfig --list|grep ${3}|grep on)" && error "Service (${3}) not enabled at boot." ;;
												(debian) 
														case "$(initctl list|grep ${3}|awk '{print $2}'|awk -f'/' '{print $1}')" in
																(stop) error "Service (${3}) not enabled at boot." ;;
														esac
														;;
										esac
										;;
								(disabled)
										case "${QC_DISTRO}" in
												(redhat) test ! -z "$(chkconfig --list|grep ${3}|grep on)" && error "Service (${3}) still enabled at boot." ;;
												(debian) 
														case "$(initctl list|grep ${3}|awk '{print $2}'|awk -f'/' '{print $1}')" in
																(start) error "Service (${3}) still enabled at boot." ;;
														esac
														;;
										esac
										;;
								(*) cat ${QC_BASE_DIR}/help/must-be.txt 2>/dev/null     ;;
						esac
						;;
				(*) cat ${QC_BASE_DIR}/help/must.txt 2>/dev/null                ;;
    esac
}