Check_env function parsing and check_env Parsing

Check_env function parsing and check_env Parsing

It is also a long function used to check file permissions and directory conditions. The Code is as follows:

Check_env () {# Check user privilege. # Check user Permissions

    check_user root    # Check FQDN hostname.

# Check whether the host name meets the check_hostname rules # Check config tool: dialog.

# Check whether the configuration tool dig_has check_pkg $ {BIN_DIALOG }$ {PKG_DIALOG} ECHO_INFO-n "Checking configuration file :$ {IREDMAIL_CONFIG_FILE }... "# Check whether the configuration file exists. The default installation package does not exist. It should be used to resume installation after the installation is interrupted.

    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]"

# Read an existing configuration file

            read_setting ${AUTO_USE_EXISTING_CONFIG_FILE}

# Select whether to use an existing configuration file or reinstall it.

            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'                    #

# Determine whether a status file exists. If yes, read the status file.

                                    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}