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61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
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#!/bin/sh
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#
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# Shorewall interface helper utility - V4.2
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#
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# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
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#
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# (c) 2007 - Tom Eastep (teastep@shorewall.net)
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#
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# This file is installed in /usr/share/shorewall/wait4ifup
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#
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# Shorewall documentation is available at http://www.shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# If an error occurs while starting or restarting the firewall, the
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# firewall is automatically stopped.
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#
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# The firewall uses configuration files in /etc/shorewall/ - skeleton
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# files is included with the firewall.
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#
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# wait4ifup <interface> [ <seconds to wait> ]
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#
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interface_is_up() {
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[ -n "$(ip link list dev $1 2> /dev/null | grep -e '[<,]UP[,>]')" ]
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}
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case $# in
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1)
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timeout=60
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;;
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2)
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timeout=$2
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;;
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*)
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echo "usage: $(basename $0) <interface> [ <timeout> ]"
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exit 2
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;;
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esac
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while [ $timeout -gt 0 ]; do
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interface_is_up $1 && exit 0
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sleep 1
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timeout=$(( $timeout - 1 ))
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done
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exit 1
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