check_env函数解析

发布时间：2015-11-06 16:48:38作者：知识屋

又是一个比较长的函数，是用来检查文件权限，目录条件的。具体代码如下：

check_env(){    # Check user privilege.    #检查用户权限    check_user root    # Check FQDN hostname.    #检查主机名是否符合规则    check_hostname    # Check config tool: dialog.    #检查配置工具dialog是否存在    check_pkg ${BIN_DIALOG} ${PKG_DIALOG}    ECHO_INFO -n "Checking configuration file: ${IREDMAIL_CONFIG_FILE} ..."    #判断配置文件是否存在，默认的安装包下是没有的，应该是用于安装中断后，恢复安装的。    if [ -f ${IREDMAIL_CONFIG_FILE} ]; then        if grep '^#EOF$' ${IREDMAIL_CONFIG_FILE} >/dev/null; then            echo -e " [FOUND]"            ECHO_QUESTION -n "Use it for mail server setting? [y|N]"                        #读取已经存在的配置文件            read_setting ${AUTO_USE_EXISTING_CONFIG_FILE}            #给用户一个选择，是用已经存在的配置文件，还是重新安装            case $ANSWER in                Y|y )                    ECHO_INFO "Use config file: ${IREDMAIL_CONFIG_FILE} for mail server setting."                    . ${IREDMAIL_CONFIG_FILE}                    # Check installation status.                    # After each component installation was completed, there                    # should be a variable in ${STATUS_FILE}, e.g.                    #                    #   export STATUS_PHP_INSTALLATION='DONE'                    #   export STATUS_PHP_CONFIGURATION='DONE'                    #                    #判断状态文件是否存在，如果存在则读取状态文件                                    if [ -f ${STATUS_FILE} ]; then                        ECHO_INFO "Import installation process status from file: ${STATUS_FILE}."                        . ${STATUS_FILE}                    else                        echo '' > ${STATUS_FILE}                    fi                    # Initialize tip file.                    if [ ! -f ${TIP_FILE} ]; then                        cat > ${TIP_FILE} <<EOF${CONF_MSG}EOF                    fi                    ;;                N|n|* )                    ECHO_INFO "Skip configuration file: ${IREDMAIL_CONFIG_FILE}."                    . ${CONFIG_VIA_DIALOG}                    ;;            esac        else            ECHO_INFO "Found, but not finished."            . ${CONFIG_VIA_DIALOG}        fi    else        ECHO_INFO "[NOT FOUND]"        . ${CONFIG_VIA_DIALOG}    fi    check_runtime_dir}

（免责声明：文章内容如涉及作品内容、版权和其它问题，请及时与我们联系，我们将在第一时间删除内容，文章内容仅供参考）