- D.25. /sbin/ifdown -

#!/bin/bash
-########################################################################
-# Begin /sbin/ifdown
-#
-# Description : Interface Down
-#
-# Authors     : Nathan Coulson - nathan@linuxfromscratch.org
-#               Kevin P. Fleming - kpfleming@linuxfromscratch.org
-# Update      : Bruce Dubbs - bdubbs@linuxfromscratch.org
-#
-# Version     : LFS 7.0
-#
-# Notes       : the IFCONFIG variable is passed to the scripts found
-#               in the /lib/services directory, to indicate what file the
-#               service should source to get interface specifications.
-#
-########################################################################
-
-RELEASE="7.0"
-
-USAGE="Usage: $0 [ -hV ] [--help] [--version] interface"
-VERSTR="LFS ifdown, version ${RELEASE}"
-
-while [ $# -gt 0 ]; do
-   case "$1" in
-      --help | -h)     help="y"; break ;;
-
-      --version | -V)  echo "${VERSTR}"; exit 0 ;;
-
-      -*)              echo "ifup: ${1}: invalid option" >&2
-                       echo "${USAGE}" >& 2
-                       exit 2 ;;
-
-      *)               break ;;
-   esac
-done
-
-if [ -n "$help" ]; then
-   echo "${VERSTR}"
-   echo "${USAGE}"
-   echo
-   cat << HERE_EOF
-ifdown is used to bring down a network interface.  The interface
-parameter, e.g. eth0 or eth0:2, must match the trailing part of the
-interface specifications file, e.g. /etc/sysconfig/ifconfig.eth0:2.
-
-HERE_EOF
-   exit 0
-fi
-
-file=/etc/sysconfig/ifconfig.${1}
-
-# Skip backup files
-[ "${file}" = "${file%""~""}" ] || exit 0
-
-. /lib/lsb/init-functions
-
-if [ ! -r "${file}" ]; then
-   log_warning_msg "${file} is missing or cannot be accessed."
-   exit 1
-fi
-
-. ${file}
-
-if [ "$IFACE" = "" ]; then
-   log_failure_msg "${file} does not define an interface [IFACE]."
-   exit 1
-fi
-
-# We only need to first service to bring down the interface
-S=`echo ${SERVICE} | cut -f1 -d" "`
-
-if ip link show ${IFACE} > /dev/null 2>&1; then
-   if [ -n "${S}" -a -x "/lib/services/${S}" ]; then
-     IFCONFIG=${file} /lib/services/${S} ${IFACE} down
-   else
-     MSG="Unable to process ${file}.  Either "
-     MSG="${MSG}the SERVICE variable was not set "
-     MSG="${MSG}or the specified service cannot be executed."
-     log_failure_msg "$MSG"
-     exit 1
-  fi
-else
-   log_warning_msg "Interface ${1} doesn't exist."
-fi
-
-# Leave the interface up if there are additional interfaces in the device
-link_status=`ip link show ${IFACE} 2>/dev/null`
-
-if [ -n "${link_status}" ]; then
-   if [ "$(echo "${link_status}" | grep UP)" != "" ]; then
-      if [ "$(ip addr show ${IFACE} | grep 'inet ')" == ""  ]; then
-         log_info_msg "Bringing down the ${IFACE} interface..."
-         ip link set ${IFACE} down
-         evaluate_retval
-      fi
-   fi
-fi
-
-# End /sbin/ifdown
-
- Линукс с нуля - Версия 12.1 -

- Приложение D. Скрипты загрузки и настройки системы-20230728 -

- D.25. /sbin/ifdown -
