** Changed in: ntp (Debian)
Status: Unknown => New
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/etc/network/if-up.d/ntpdate does not detach correctly
Status in ntp package in Ubuntu:
Status in ntp package in Debian:
It seems that the intent of /etc/network/if-up.d/ntpdate is to
background itself, as it creates a subshell with &.
As reported in bug 1202758, this doesn't seem to work correctly. That
doesn't close the file descriptors. As a result, if something is
waiting on the output of 'ifup', it will sit and wait until ntpdate is
$ time sudo sh -c 'o=$(sh -c "ifdown eth0 ; ifup eth0" 2>&1) ; echo $o'
If we change the way it detaches itself to close stdout, stdderr, and
stdin, then we're fine.
I'm reporting this, but I'm not sure how much of a real problem it is. As if
e command sends stdin and stdout to /dev/null, then debugging its output
e more difficult.
$ diff -u /etc/network/if-up.d/ntpdate.dist /etc/network/if-up.d/ntpdate
--- /etc/network/if-up.d/ntpdate.dist 2013-07-29 15:47:54.242781947 +0000
+++ /etc/network/if-up.d/ntpdate 2013-07-29 15:48:06.946781947 +0000
@@ -56,4 +56,4 @@
+) </dev/null >/dev/null 2>&1 &
DistroRelease: Ubuntu 13.10
Package: ntpdate 1:4.2.6.p5+dfsg-2ubuntu2
ProcVersionSignature: User Name 3.10.0-5.15-generic 3.10.2
Uname: Linux 3.10.0-5-generic x86_64
Date: Mon Jul 29 15:32:30 2013
PATH=(custom, no user)
UpgradeStatus: No upgrade log present (probably fresh install)
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