- D.24. /sbin/ifup -

#!/bin/sh
-########################################################################
-# Begin /sbin/ifup
-#
-# Description : Interface Up
-#
-# Authors     : Nathan Coulson - nathan@linuxfromscratch.org
-#               Kevin P. Fleming - kpfleming@linuxfromscratch.org
-# Update      : Bruce Dubbs - bdubbs@linuxfromscratch.org
-#               DJ Lucas - dj@linuxfromscratch.org
-#
-# Version     : LFS 7.7
-#
-# Notes       : The IFCONFIG variable is passed to the SERVICE script
-#               in the /lib/services directory, to indicate what file the
-#               service should source to get interface specifications.
-#
-########################################################################
-
-up()
-{
-  log_info_msg "Bringing up the ${1} interface..."
-
-  if ip link show $1 > /dev/null 2>&1; then
-     link_status=`ip link show $1`
-
-     if [ -n "${link_status}" ]; then
-        if ! echo "${link_status}" | grep -q UP; then
-           ip link set $1 up
-        fi
-     fi
-
-  else
-     log_failure_msg "Interface ${IFACE} doesn't exist."
-     exit 1
-  fi
-
-  evaluate_retval
-}
-
-RELEASE="7.7"
-
-USAGE="Usage: $0 [ -hV ] [--help] [--version] interface"
-VERSTR="LFS ifup, 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 "${USAGE}"
-   echo
-   cat << HERE_EOF
-ifup is used to bring up a network interface.  The interface
-parameter, e.g. eth0 or eth0:2, must match the trailing part of the
-interface specifications file, e.g. /etc/sysconfig/ifconfig.eth0:2.
-
-HERE_EOF
-   exit 0
-fi
-
-file=/etc/sysconfig/ifconfig.${1}
-
-# Skip backup files
-[ "${file}" = "${file%""~""}" ] || exit 0
-
-. /lib/lsb/init-functions
-
-if [ ! -r "${file}" ]; then
-   log_failure_msg "Unable to bring up ${1} interface! ${file} is missing or cannot be accessed."
-   exit 1
-fi
-
-.  $file
-
-if [ "$IFACE" = "" ]; then
-   log_failure_msg "Unable to bring up ${1} interface! ${file} does not define an interface [IFACE]."
-   exit 1
-fi
-
-# Do not process this service if started by boot, and ONBOOT
-# is not set to yes
-if [ "${IN_BOOT}" = "1" -a "${ONBOOT}" != "yes" ]; then
-   exit 0
-fi
-
-# Bring up the interface
-if [ "$VIRTINT" != "yes" ]; then
-   up ${IFACE}
-fi
-
-for S in ${SERVICE}; do
-  if [ ! -x "/lib/services/${S}" ]; then
-    MSG="\nUnable to process ${file}.  Either "
-    MSG="${MSG}the SERVICE '${S} was not present "
-    MSG="${MSG}or cannot be executed."
-    log_failure_msg "$MSG"
-    exit 1
-  fi
-done
-
-if [ "${SERVICE}" = "wpa" ]; then log_success_msg; fi
-
-# Create/configure the interface
-for S in ${SERVICE}; do
-  IFCONFIG=${file} /lib/services/${S} ${IFACE} up
-done
-
-# Set link up virtual interfaces
-if [ "${VIRTINT}" == "yes" ]; then
-   up ${IFACE}
-fi
-
-# Bring up any additional interface components
-for I in $INTERFACE_COMPONENTS; do up $I; done
-
-# Set MTU if requested. Check if MTU has a "good" value.
-if test -n "${MTU}"; then
-   if [[ ${MTU} =~ ^[0-9]+$ ]] && [[ $MTU -ge 68 ]] ; then
-      for I in $IFACE $INTERFACE_COMPONENTS; do
-         ip link set dev $I mtu $MTU;
-      done
-   else
-      log_info_msg2 "Invalid MTU $MTU"
-   fi
-fi
-
-# Set the route default gateway if requested
-if [ -n "${GATEWAY}" ]; then
-   if ip route | grep -q default; then
-      log_warning_msg "Gateway already setup; skipping."
-   else
-      log_info_msg "Adding default gateway ${GATEWAY} to the ${IFACE} interface..."
-      ip route add default via ${GATEWAY} dev ${IFACE}
-      evaluate_retval
-   fi
-fi
-
-# End /sbin/ifup
-
- Линукс с нуля - Версия 12.1 -

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

- D.24. /sbin/ifup -
