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Use ${EDITOR} as claimed.

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Source rc.conf and use ${firewall_script} instead of rc.firewall.

Textwidth formatting of comments and text.

PR:
Submitted by:	Maxim <maxim@news1.macomnet.ru>

(sorry if I got name/email/committer status wrong :)
This commit is contained in:
Daniel C. Sobral 2001-06-06 19:34:02 +00:00
parent 765a54f4c9
commit db97c662cf
1 changed files with 38 additions and 29 deletions
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67
share/examples/ipfw/change_rules.sh
View file

@ -28,27 +28,36 @@
# Change ipfw(8) rules with safety guarantees for remote operation
#
# Invoke this script to edit rc.firewall. It will call ${EDITOR}, or
# vi(1) if the environment variable is not set, for you to edit rc.firewall,
# asks for confirmation and then run rc.firewall. You can then examine
# the output of ipfw list and confirm whether you want the new version or
# not.
# Invoke this script to edit ${firewall_script}. It will call ${EDITOR},
# or vi(1) if the environment variable is not set, for you to edit
# ${firewall_script}, asks for confirmation and then run
# ${firewall_script}. You can then examine the output of ipfw list and
# confirm whether you want the new version or not.
#
# If no answer is received in 30 seconds, the previous rc.firewall is
# run, restoring the old rules (this assumes ipfw flush is present in
# it).
# If no answer is received in 30 seconds, the previous
# ${firewall_script} is run, restoring the old rules (this assumes ipfw
# flush is present in it).
#
# If the new rules are confirmed, they'll replace rc.firewall and the
# previous ones will be copied to rc.firewall.{date}. A mail will also
# be sent to root with the unified diffs of the rule change.
# If the new rules are confirmed, they'll replace ${firewall_script} and
# the previous ones will be copied to ${firewall_script}.{date}. A mail
# will also be sent to root with the unified diffs of the rule change.
#
# Non-approved rules are kept in rc.firewall.new, and you are offered
# the option of changing them instead of the present rules when you
# call this script.
# Non-approved rules are kept in ${firewall_script}.new, and you are
# offered the option of changing them instead of the present rules when
# you call this script.
#
# It is suggested improving this script by using some version control
# software.
if [ -r /etc/defaults/rc.conf ]; then
. /etc/defaults/rc.conf
source_rc_confs
elif [ -r /etc/rc.conf ]; then
. /etc/rc.conf
fi
EDITOR=${EDITOR:-/usr/bin/vi}
get_yes_no() {
while true
do
@ -69,46 +78,46 @@ get_yes_no() {
}
restore_rules() {
nohup sh /etc/rc.firewall >/dev/null 2>&1
nohup sh ${firewall_script} >/dev/null 2>&1
exit
}
if [ -f /etc/rc.firewall.new ]; then
if [ -f /etc/${firewall_script}.new ]; then
get_yes_no "A new rules file already exists, do you want to use it"
[ $a = 'No' ] && cp /etc/rc.firewall /etc/rc.firewall.new
[ $a = 'No' ] && cp ${firewall_script} /etc/${firewall_script}.new
else
cp /etc/rc.firewall /etc/rc.firewall.new
cp ${firewall_script} /etc/${firewall_script}.new
fi
trap restore_rules SIGHUP
vi /etc/rc.firewall.new
${EDITOR} /etc/${firewall_script}.new
get_yes_no "Do you want to install the new rules"
[ $a = 'No' ] && exit
cat <<!
The rules will be changed now. If the message 'Type y to keep the new rules'
do not appear on the screen or the y key is not pressed in 30 seconds, the
former rules will be restored.
The rules will be changed now. If the message 'Type y to keep the new
rules' do not appear on the screen or the y key is not pressed in 30
seconds, the former rules will be restored.
The TCP/IP connections might be broken during the change. If so, restore
the ssh/telnet connection being used.
!
nohup sh /etc/rc.firewall.new > /tmp/rc.firewall.out 2>&1;
nohup sh /etc/${firewall_script}.new > /tmp/${firewall_script}.out 2>&1;
sleep 2;
get_yes_no "Would you like to see the resulting new rules"
[ $a = 'Yes' ] && vi /tmp/rc.firewall.out
[ $a = 'Yes' ] && ${EDITOR} /tmp/${firewall_script}.out
get_yes_no "Type y to keep the new rules"
[ $a != 'Yes' ] && restore_rules
DATE=`date "+%Y%m%d%H%M"`
cp /etc/rc.firewall /etc/rc.firewall.$DATE
mv /etc/rc.firewall.new /etc/rc.firewall
cp ${firewall_script} /etc/${firewall_script}.$DATE
mv /etc/${firewall_script}.new ${firewall_script}
cat <<!
The new rules are now default. The previous rules have been preserved
in the file /etc/rc.firewall.$DATE
The new rules are now default. The previous rules have been preserved in
the file /etc/${firewall_script}.$DATE
!
diff -F "^# .*[A-Za-z]" -u /etc/rc.firewall.$DATE /etc/rc.firewall | mail -s "`hostname` Firewall rule change" root
diff -F "^# .*[A-Za-z]" -u /etc/${firewall_script}.$DATE ${firewall_script} | mail -s "`hostname` Firewall rule change" root