Re: [PATCH v5 1/3] common/xfs: Check if write supports [-c|-d] option in xfs_db

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Thu, Jan 18, 2018 at 06:49:53PM +0800, xiao yang wrote:
> Make sure _scratch_xfs_set_metadata_field() can be used on an
> old xfsprogs-dev(e.g. v3.1.1).
> 
> The "-d" option was introduced since xfsprogs-dev v4.7.0 by commit
> 86769b3 ("xfs_db: allow recalculating CRCs on invalid metadata").
> 
> The special argument "--" is only used to end option-scanning
> in getopt().  getopt() was introduced since xfsprogs-dev v3.2.3 by
> commit c9f5e3d ("xfs_db: Allow writes of corrupted data")'.
> 
> Signed-off-by: xiao yang <yangx.jy@cn.fujitsu.com>

Looks ok,
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

> ---
>  common/xfs | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/common/xfs b/common/xfs
> index 45b84a0..ab58364 100644
> --- a/common/xfs
> +++ b/common/xfs
> @@ -658,8 +658,11 @@ _scratch_xfs_set_metadata_field()
>  	for arg in "$@"; do
>  		cmds+=("-c" "${arg}")
>  	done
> -	_scratch_xfs_db -x "${cmds[@]}" -c "write -d ${key} -- ${value}"
> -	echo
> +
> +	local wr_cmd="write"
> +	_scratch_xfs_db -x -c "help write" | egrep -q "(-c|-d)" && value="-- ${value}"
> +	_scratch_xfs_db -x -c "help write" | egrep -q "(-d)" && wr_cmd="${wr_cmd} -d"
> +	_scratch_xfs_db -x "${cmds[@]}" -c "${wr_cmd} ${key} ${value}"
>  }
>  
>  _scratch_xfs_get_sb_field()
> -- 
> 1.8.3.1
> 
> 
> 
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