156620 - fuser /dev/dsp in startup wrapper script blocks

Status: VERIFIED INVALID

(SeaMonkey :: General, defect)

Description

[Joshua Neal]

From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.0) Gecko/20020615
Debian/1.0.0-3
BuildID:    Debian 1.0.0-3

The code in the mozilla script under the section "## find /dev/dsp handler" is
doing an 'fuser /dev/dsp', but fuser is blocking on a temporarily unavailable
remotely mounted fs.

From strace of fuser /dev/dsp':

open("/proc/mounts", O_RDONLY)          = 3
...
stat64("/proc/bus/usb", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
stat64("/proc/bus/usb/..", {st_mode=S_IFDIR|0555, st_size=0, ...}) = 0
stat64("//tinhorn/c", 
 <unfinished ...>

//tinhorn/c in this case is a smbmounted filesystem, fuser seems to be choking
due to trying to stat this filesystem, which is presumably blocking until the
filesystem connection is re-established.

Reproducible: Always
Steps to Reproduce:
1.Mount a remote filesystem via samba, then make the remote system go away
(power down/yank network cable.)
2.Start mozilla via the 'mozilla' wrapper script.

Actual Results:  Mozilla hangs on startup, prior to actually running 

Expected Results:  Started.

Workaround, other than unmounting the remote filesystem, would be to define the
environment variable MOZILLA_DSP to the correct value rather than undefined or auto.

Example:

$ export MOZILLA_DSP=none 

(You may want to substitute 'esddsp' or 'artsdsp' for 'none'.)

Comment 1

[Boris Zbarsky [:bzbarsky]]

> The code in the mozilla script under the section "## find /dev/dsp handler" is
> doing an 'fuser /dev/dsp'

This is only the case in the version of the mozilla script that Debian
distributes.  Please file a bug on Debian to fix their script....

Thanks,
Boris

Comment 2

[Matthias Versen [:Matti]]

verified invalid

We accept only bugs from mozilla.org builds.
Please verify that you see the problem with a mozilla.org build before you file
a bug at bugzilla.mozilla.org.