mirror of
https://gitlab.com/shorewall/code.git
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7ae7fc3089
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@154 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
172 lines
4.2 KiB
Bash
Executable File
172 lines
4.2 KiB
Bash
Executable File
#!/bin/sh
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#
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# Shorewall 1.3 -- /var/lib/shorewall/functions
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#
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# Suppress all output for a command
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#
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qt()
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{
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"$@" >/dev/null 2>&1
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}
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#
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# Find a File -- Look first in $SHOREWALL_DIR then in /etc/shorewall
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#
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find_file()
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{
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if [ -n "$SHOREWALL_DIR" -a -f $SHOREWALL_DIR/$1 ]; then
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echo $SHOREWALL_DIR/$1
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else
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echo /etc/shorewall/$1
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fi
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}
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#
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# Replace commas with spaces and echo the result
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#
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separate_list()
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{
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echo $1 | sed 's/,/ /g'
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}
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#
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# Find the zones
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#
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find_zones() # $1 = name of the zone file
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{
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while read zone display comments; do
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[ -n "$zone" ] && case "$zone" in
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\#*)
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;;
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$FW|multi)
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echo "Reserved zone name \"$zone\" in zones file ignored" >&2
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;;
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*)
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echo $zone
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;;
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esac
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done < $1
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}
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find_display() # $1 = zone, $2 = name of the zone file
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{
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grep ^$1 $2 | while read z display comments; do
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[ "x$1" = "x$z" ] && echo $display
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done
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}
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determine_zones()
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{
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local zonefile=`find_file zones`
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multi_display=Multi-zone
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if [ -f $zonefile ]; then
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zones=`find_zones $zonefile`
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zones=`echo $zones` # Remove extra trash
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for zone in $zones; do
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dsply=`find_display $zone $zonefile`
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eval ${zone}_display=\$dsply
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done
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else
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zones="net local dmz gw"
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net_display=Net
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local_display=Local
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dmz_display=DMZ
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gw_display=Gateway
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fi
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}
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###############################################################################
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# The following functions may be used by apps that wish to ensure that
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# the state of Shorewall isn't changing
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#------------------------------------------------------------------------------
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# This function loads the STATEDIR variable (directory where Shorewall is to
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# store state files). If your application supports alternate Shorewall
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# configurations then the name of the alternate configuration directory should
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# be in $SHOREWALL_DIR at the time of the call.
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#
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# If the shorewall.conf file does not exist, this function does not return
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###############################################################################
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get_statedir()
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{
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MUTEX_TIMEOUT=
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local config=`find_file shorewall.conf`
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if [ -f $config ]; then
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. $config
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else
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echo "/etc/shorewall/shorewall.conf does not exist!" >&2
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exit 2
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fi
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[ -z "${STATEDIR}" ] && STATEDIR=/var/state/shorewall
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}
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###############################################################################
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# Call this function to assert MUTEX with Shorewall. If you invoke the
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# /sbin/shorewall program while holding MUTEX, you should pass "nolock" as
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# the first argument. Example "shorewall nolock refresh"
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#
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# This function uses the lockfile utility from procmail if it exists.
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# Otherwise, it uses a somewhat race-prone algorithm to attempt to simulate the
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# behavior of lockfile.
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###############################################################################
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mutex_on()
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{
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local try=0
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local lockf=$STATEDIR/lock
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MUTEX_TIMEOUT=${MUTEX_TIMEOUT:-60}
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if [ $MUTEX_TIMEOUT -gt 0 ]; then
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[ -d $STATEDIR ] || mkdir -p $STATEDIR
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if qt which lockfile; then
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lockfile -${MUTEX_TIMEOUT} -r1 ${lockf}
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else
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while [ -f ${lockf} -a ${try} -lt ${MUTEX_TIMEOUT} ] ; do
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sleep 1
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try=$((${try} + 1))
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done
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if [ ${try} -lt ${MUTEX_TIMEOUT} ] ; then
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# Create the lockfile
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echo $$ > ${lockf}
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else
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echo "Giving up on lock file ${lockf}" >&2
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fi
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fi
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fi
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}
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###############################################################################
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# Call this function to release MUTEX
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###############################################################################
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mutex_off()
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{
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rm -f $STATEDIR/lock
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}
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###############################################################################
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# Strip comments and blank lines from a file and place the result in the #
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# temporary directory #
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###############################################################################
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strip_file() # $1 = Base Name of the file, $2 = Full Name of File (optional)
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{
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local fname
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[ $# = 1 ] && fname=`find_file $1` || fname=$2
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if [ -f $fname ]; then
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cut -d'#' -f1 $fname | grep -v '^[[:space:]]*$' > $TMP_DIR/$1
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else
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> $TMP_DIR/$1
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fi
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}
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