/sbin/ifenslave is in ifenslave 2.4ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# Copyright (C) 2012-2013 Guus Sliepen <guus@debian.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
set -e
version() {
echo 'ifenslave.sh version 2 (2013-05-05)'
echo 'Copyright (c) 2012-2013 Guus Sliepen <guus@debian.org>'
exit 0
}
usage() {
echo 'Usage: ifenslave [-acdfhuvV] <master> <slave> ...'
exit 0
}
error() {
echo "$@" >&2
exit 1
}
all_interfaces() {
# I guess this was a debugging feature.
ip link show
exit 0
}
# Parse options
while true; do
if [ "$1" = "-a" -o "$1" = "--all-interfaces" ]; then
all_interfaces
elif [ "$1" = "-c" -o "$1" = "--change-active" ]; then
CHANGE_ACTIVE=1; shift
elif [ "$1" = "-d" -o "$1" = "--detach" ]; then
DETACH=1; shift
elif [ "$1" = "-f" -o "$1" = "--force" ]; then
FORCE=1; shift
elif [ "$1" = "-h" -o "$1" = "--help" ]; then
exec man 8 ifenslave
elif [ "$1" = "-u" -o "$1" = "--usage" ]; then
usage
elif [ "$1" = "-v" -o "$1" = "--verbose" ]; then
VERBOSE=1; shift
elif [ "$1" = "-V" -o "$1" = "--version" ]; then
version
elif [ "$1" = "--" ]; then
shift
break
else
break
fi
done
# Check that we have enough arguments remaining.
[ -z "$2" ] && error "Not enough arguments"
master="$1"
shift
# Check that the master is really a bonding interface.
[ -d "/sys/class/net/$master" ] || error "$master: no such interface"
[ -d "/sys/class/net/$master/bonding" ] || error "$master: is not a bonding interface"
# Do we need to change the active interface?
if [ "$CHANGE_ACTIVE" = 1 ]; then
[ -z "$2" ] || error 'You can only set one interface to be the active slave!'
[ "$VERBOSE" = 1 ] && echo "Changing active slave of $master to $slave"
echo "$1" >"/sys/class/net/$master/bonding/active_slave" || error "$master: could not set $slave to active slave"
exit 0
fi
# Otherwise, loop over all slaves and either attach or detach them.
for slave in "$@"; do
[ -d "/sys/class/net/$slave" ] || error "$slave: no such interface"
if [ -z "$DETACH" ]; then
if [ -h "/sys/class/net/$master/slave_$slave" ]; then
echo "$slave: already enslaved to $master" >&2
continue
fi
read type <"/sys/class/net/$slave/type"
if [ -z "$FORCE" -a "$type" != "1" ]; then
error "$slave: does not appear to be an Ethernet interface (use -f to force)"
fi
[ "$VERBOSE" = 1 ] && echo "Adding slave $slave to master $master"
ip link set "$slave" down
echo "+$slave" >"/sys/class/net/$master/bonding/slaves" || error "$slave: could not add interface"
else
if [ ! -h "/sys/class/net/$master/slave_$slave" ]; then
echo "$slave: is not enslaved to $master" >&2
continue
fi
[ "$VERBOSE" = 1 ] && echo "Detaching slave $slave from master $master"
echo "-$slave" >"/sys/class/net/$master/bonding/slaves" || error "$slave: could not detach interface"
fi
done
exit 0
|