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Re: [PATCH] xfstests 228: suppress core dump message

To: xfs-oss <xfs@xxxxxxxxxxx>
Subject: Re: [PATCH] xfstests 228: suppress core dump message
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Thu, 12 Aug 2010 14:50:17 -0400
In-reply-to: <4C0FB207.20706@xxxxxxxxxxx>
References: <4C0FB207.20706@xxxxxxxxxxx>
User-agent: Thunderbird 2.0.0.24 (Macintosh/20100228)
Eric Sandeen wrote:
> When running 228 with abrt on in rhel6, I was getting different
> output due to a (core dumped) message on SIGXFSZ.  For some reason
> I wasn't able to use sed to filter it, and just ulimit -c 0 didn't
> suppress it either.
> 
> abrt sets the core pattern to:
> 
> "|/usr/libexec/abrt-hook-ccpp /var/spool/abrt %p %s %u %c""
> 
> which apparently allows core dumps even if ulimit -c is 0, due
> to the pipe.
> 
> Temporarily changing the kernel's core pattern to just plain "core"
> and setting ulimit -c to 0 does suppress it.  These are reset to
> original values after the test is run.
> 
> Signed-off-by: Eric Sandeen <sandeen@xxxxxxxxxxx>

hm ping on this one?

> ---
> 
> --- 228.orig  2010-06-09 11:13:27.000000000 -0400
> +++ 228       2010-06-09 11:19:57.000000000 -0400
> @@ -31,6 +31,8 @@
>  {
>       cd /
>       rm -f $tmp.*
> +     sysctl -w kernel.core_pattern="$core_pattern" &>/dev/null
> +     ulimit -c $ulimit_c
>  }
>  
>  here=`pwd`
> @@ -58,6 +60,12 @@
>  avail=`df -P $TEST_DIR | awk 'END {print $4}'`
>  [ "$avail" -ge 104000 ] || _notrun "Test device is too small ($avail KiB)"
>  
> +# Suppress core dumped messages
> +core_pattern=`sysctl kernel.core_pattern | awk -F = '{print $NF}'`
> +ulimit_c=`ulimit -c`
> +sysctl -w kernel.core_pattern=core &>/dev/null
> +ulimit -c 0
> +
>  # Set the FSIZE ulimit to 100MB and check
>  ulimit -f 102400
>  flim=`ulimit -f`
> 
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