network manager does not run files in /etc/network/if-pre-up.d

[Damien Robert]

Binary package hint: network-manager

On ubuntu intrepid:
/etc/NetworkManager/dispatcher.d/01ifupdown reads the file in the directory
/etc/network/if-$2.d. The problem is that this script is only called with the down or up command, never the pre-up command, so the files in /etc/network/if-preup.d are not read prior to establishing the connection.
( i added echo "$@" >> /tmp/blouh at the beginning of the script, and after some plugging/unplugging of the network cable or using the gnome-applet to disable/enable the network, i get:
cat /tmp/blouh
eth0 down
eth0 up
eth0 down
eth0 up
There is no preup/postdown calls, which is a problem since there are scripts in the corresponding directories.)

[MarcH (marc-h38)]

I definitely confirm this. What is extremely confusing is the following source code in "dispatcher.d/01ifupdown":

case "$2" in
    up) .....
    down) ...
    pre-up) .... !?
    post-down) .... !?
esac

Has the author of this script really used it?

This is quite a regression considering that hooks in /etc/dhcp3/ are not run either (another problem).

[MarcH (marc-h38)]

Here is a scary hack to run-parts /etc/network/if-down.d. I will deny having written this patch, but it works4me.

[Petr Sodomka (pesmail2003)]

There is probably duplicate of this bug here: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/336736

They say it was changed in upstream. But we have lots of packages which depends on this:

apt-file search etc/network/if-pre-up.d
bridge-utils: /etc/network/if-pre-up.d/bridge
ethtool: /etc/network/if-pre-up.d/ethtool
hostap-utils: /etc/network/if-pre-up.d/hostap-utils
hostapd: /etc/network/if-pre-up.d/hostapd
ifenslave-2.6: /etc/network/if-pre-up.d/ifenslave
ifupdown-extra: /etc/network/if-pre-up.d/00check-network-cable
ifupdown-scripts-zg2: /etc/network/if-pre-up.d/00README.linkdir
linux-wlan-ng: /etc/network/if-pre-up.d/linux-wlan-ng-pre-up
uml-utilities: /etc/network/if-pre-up.d/uml-utilities
vde2: /etc/network/if-pre-up.d/vde2
vlan: /etc/network/if-pre-up.d/vlan
whereami: /etc/network/if-pre-up.d/whereami
wireless-tools: /etc/network/if-pre-up.d/wireless-tools
wpasupplicant: /etc/network/if-pre-up.d/wpasupplicant

As suggested in similar bug in Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=518368

I think if-pre-up and if-post-down functionality should be brought back!