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#!/bin/sh
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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 the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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# This script updates a cache of the unix group database. It's purpose is to
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# speedup group authorization when using large groups with slow nss backends.
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# For more info consult the README.groupcache file.
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#
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# This script can safely be run as root, it will reexec itself as user
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# cyrus if needed.
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#
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# author: Simon Matter, Invoca Systems <simon.matter@invoca.ch>
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# changelog
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# v1.0.0, Dec 15 2004 Simon Matter <simon.matter@invoca.ch>
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# - initial release
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if [ ! -f /etc/imapd.conf ]; then
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echo "ERROR: configuration file not found."
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exit 1
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fi
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# fallback to su if runuser not available
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if [ -x /sbin/runuser ]; then
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RUNUSER=runuser
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else
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RUNUSER=su
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fi
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# force cyrus user for security reasons
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if [ ! $(whoami) = "cyrus" ]; then
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exec $RUNUSER - cyrus -c "cd $PWD < /dev/null ; $0"
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fi
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# files get mode 0600
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umask 166
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# get_config [config default]
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# extracts config option from config file
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get_config() {
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if config=$(grep "^$1" /etc/imapd.conf); then
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echo $config | cut -d: -f2
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else
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echo $2
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fi
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}
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# where to find files and directories
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imap_prefix=$(get_config configdirectory /var/lib/imap)
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group_cache=${imap_prefix}/group.cache
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TMPCACHE=$(mktemp ${group_cache}.XXXXXX) || exit 1
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getent group >> $TMPCACHE
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mv -f $TMPCACHE $group_cache
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