[PATCH] xfs_quota: allow create limit when user or group names beginning with digits

[Eric Sandeen]

Hi Dave, I think this one got missed.  Can you pick it up for next time?

Thanks,
-Eric

On 12/2/15 10:05 PM, Eric Sandeen wrote:
> I had to re-read the strtoul manpage (3 times) but yes, this looks right to
> me.
> 
> (technically it should probably check for overflow etc but I suppose that is
> outside the scope of this fix)
> 
> An xfstest would be good for this, although (as we discussed on IRC) I'm not
> sure if it is OK for xfstests to add users & groups - no other test does
> that today...
> 
> Reviewed-by: Eric Sandeen <sandeen at redhat.com>
> 
> On 12/2/15 3:02 AM, Zorro Lang wrote:
>> A normal user or group name allow beginning with digits, but xfs_quota can't
>> create a limit for that user or group. The reason is 'strtoul' function only
>> translate digits at the beginning.
>>
>> There's a commit fd537fc50eeade63bbd2a66105f39d04a011a7f5, it try to fix
>> "xfsprogs: xfs_quota allow user or group names beginning with digits". But
>> it doesn't effect 'limit .... 12345678-user' command.
>>
>> Signed-off-by: Zorro Lang <zlang at redhat.com>
>> ---
>>
>> Hi Eric,
>>
>> This problem from a bug of ours, I have left message to you, please
>> help to check my simple patch. Thanks very much.
>>
>> Hi Rich,
>>
>> I don't understand why you fix commit fd537fc50eeade63bbd2a66105f39d04a011a7f5,
>> but didn't fix this. Or is this a feature, not a bug?
>>
>> I'm not so familiar with xfsprogs code, so if I'm wrong, please tell me;)
>>
>> Thanks,
>> Zorro
>>
>>  libxcmd/input.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/libxcmd/input.c b/libxcmd/input.c
>> index c505ab3..5a7dce3 100644
>> --- a/libxcmd/input.c
>> +++ b/libxcmd/input.c
>> @@ -366,7 +366,7 @@ uid_from_string(
>>  	char		*sp;
>>  
>>  	uid_long = strtoul(user, &sp, 10);
>> -	if (sp != user) {
>> +	if (sp != user && *sp == '\0') {
>>  		if ((uid_long == ULONG_MAX && errno == ERANGE)
>>  				|| (uid_long > (uid_t)-1))
>>  			return -1;
>> @@ -387,7 +387,7 @@ gid_from_string(
>>  	char		*sp;
>>  
>>  	gid_long = strtoul(group, &sp, 10);
>> -	if (sp != group) {
>> +	if (sp != group && *sp == '\0') {
>>  		if ((gid_long == ULONG_MAX && errno == ERANGE)
>>  				|| (gid_long > (gid_t)-1))
>>  			return -1;
>>
> 
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