Hi list,
occasionally I'm in the situation where having multiple
configurations for a single network interface are handy to have.
Admittedly, this doesn't affect servers as much as notebooks,
where using severals wifi nets/logins is the average case.
Most seamlessly, this could be handled by using an
arbitrary extension to the hostname.if files, separated by
and additional dot (e.g. hostname.athn0.home,
hostname.em0.bak20120223).
Below a diff to /etc/netstart is attached, that strips the
suffix including the dot from hostname.if.suffix (if it is
present) and otherwise allows such files to be used. I tried
to change the code of netstart as minimally as possible.
An interesting side-effect is the ease with which wifi cell
changes can now be handled by ifstated.
I'd suppose that this must scratch the itch of other users, too.
However as this is only a rough guess, I'm curious to hear some
opinions on it.
All the best,
/Markus
--- /etc/netstart Tue Dec 20 18:54:07 2011
+++ netstart Thu Feb 16 11:15:14 2012
@@ -18,7 +18,7 @@
_n=$1
while [ ${#_n} != 0 ]; do
case $_n in
- [A-Za-z0-9]*) ;;
+ [A-Za-z0-9.]*) ;;
*) return 1;;
esac
_n=${_n#?}
@@ -26,6 +26,14 @@
return 0
}
+# Strips everything from the first dot, if applicable
+raw() {
+ local_r
+ _r=$1
+ _r=${_r%%.*}
+ echo $_r
+}
+
# Start the $1 interface
ifstart() {
if=$1
@@ -47,9 +55,9 @@
chmod -LR o-rwx $file
chown -LR root.wheel $file
fi
- if ! ifconfig $if > /dev/null 2>&1; then
+ if ! ifconfig `raw $if` > /dev/null 2>&1; then
# Try to create interface if it does not exist
- if ! ifconfig $if create > /dev/null 2>&1; then
+ if ! ifconfig `raw $if` create > /dev/null 2>&1; then
return
fi
fi
@@ -83,13 +91,13 @@
[ "$name" = "NONE" ] && name=
[ "$mask" = "NONE" ] && mask=
[ "$bcaddr" = "NONE" ] && bcaddr=
- cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 down"
- cmd="$cmd;dhclient $if"
- dhcpif="$dhcpif $if"
+ cmd="ifconfig `raw $if` $name $mask $bcaddr $ext1 $ext2
down"
+ cmd="$cmd;dhclient `raw $if`"
+ dhcpif="$dhcpif `raw $if`"
;;
"rtsol")
- rtsolif="$rtsolif $if"
- cmd="ifconfig $if $name $mask $bcaddr $ext1 $ext2 up"
+ rtsolif="$rtsolif `raw $if`"
+ cmd="ifconfig `raw $if` $name $mask $bcaddr $ext1 $ext2
up"
;;
*)
read dt dtaddr
@@ -104,7 +112,7 @@
else
alias=
fi
- cmd="ifconfig $if $af $alias $name"
+ cmd="ifconfig 4raw $if4 $af $alias $name"
case "$dt" in
dest)
cmd="$cmd $dtaddr"
@@ -149,7 +157,8 @@
# don't start "$2" interfaces
ifmstart() {
for sif in ${1:-ALL}; do
- for hn in /etc/hostname.*; do
+ # Only loop over real interfaces
+ for hn in /etc/hostname.*([A-Za-z0-9]); do
# Strip off /etc/hostname. prefix
if=${hn#/etc/hostname.}
test "$if" = "*" && continue
