[PATCH] xfsdump: fix bug restricting -f pathname length

[Alex Elder]

On Thu, 2011-02-24 at 12:40 -0600, Bill Kendall wrote:
> A temporary buffer storing the dump filename (-f) is smaller than
> the otherwise allowed pathname length. This buffer is used to
> extract the pathname from additional parameters specified as part
> of the -f argument. As these parameters are an undocumented and
> unused extension of the -f argument, simply remove this code.
> Note that drive_alloc() always dups the given pathname, so
> 'optarg' is passed directly.

If someone happens to put something starting with a comma
after the device path name, will it simply fail because
a device by that name (comma included) won't exist?

Either way, this looks good.  I'll hold off a bit before
taking this in, in case someone else wants a chance to
review.

Reviewed-by: Alex Elder <aelder at sgi.com>

> Signed-off-by: Bill Kendall <wkendall at sgi.com>
> ---
>  common/drive.c |   18 +-----------------
>  1 files changed, 1 insertions(+), 17 deletions(-)
> 
> diff --git a/common/drive.c b/common/drive.c
> index f184afa..227fecd 100644
> --- a/common/drive.c
> +++ b/common/drive.c
> @@ -137,10 +137,6 @@ drive_init1( int argc, char *argv[ ], bool_t singlethreaded )
>  	opterr = 0;
>  	driveix = 0;
>  	while ( ( c = getopt( argc, argv, GETOPT_CMDSTRING )) != EOF ) {
> -		char optarray[100];
> -		char *devname;
> -		char *token;
> -
>  		switch ( c ) {
>  		case GETOPT_DUMPDEST:
>  			if ( ! optarg || optarg[ 0 ] == '-' ) {
> @@ -151,21 +147,9 @@ drive_init1( int argc, char *argv[ ], bool_t singlethreaded )
>  				return BOOL_FALSE;
>  			}
>  
> -			/* remove the device name from the rest of the
> -			 * parameter string. note that strdup malloc()s
> -			 * a string; important since optarray is an auto.
> -			 */
> -			ASSERT( strlen( optarg ) < sizeof( optarray ));
> -			strncpy( optarray, optarg, sizeof( optarray ));
> -			optarray[ sizeof( optarray ) - 1 ] = 0;
> -			if ( ( token = strtok( optarray, "," )) == NULL ) {
> -				token = optarray;
> -			}
> -			devname = strdup( token );
> -
>  			/* allocate a drive descriptor
>  			 */
> -			drivepp[ driveix ] = drive_alloc( devname, driveix );
> +			drivepp[ driveix ] = drive_alloc( optarg, driveix );
>  			driveix++;
>  			break;
>  		}