Re: [PATCH v1 2/2] entry.c: check if file exists after checkout

> On 06 Oct 2017, at 06:56, Jeff King <peff@peff.net> wrote:
> 
> On Fri, Oct 06, 2017 at 01:26:48PM +0900, Junio C Hamano wrote:
> 
> ...
>> -- >8 --
>> From: Lars Schneider <larsxschneider@gmail.com>
>> Date: Thu, 5 Oct 2017 12:44:07 +0200
>> Subject: [PATCH] entry.c: check if file exists after checkout
>> 
>> If we are checking out a file and somebody else racily deletes our file,
>> then we would write garbage to the cache entry. Fix that by checking
>> the result of the lstat() call on that file. Print an error to the user
>> if the file does not exist.
> 
> I don't know if we wanted to capture any of the reasoning behind using
> error() here or not. Frankly, I'm not sure how to argue for it
> succinctly. :) I'm happy with letting it live on in the list archive.
> 
>> diff --git a/entry.c b/entry.c
>> index f879758c73..6d9de3a5aa 100644
>> --- a/entry.c
>> +++ b/entry.c
>> @@ -341,7 +341,9 @@ static int write_entry(struct cache_entry *ce,
>> 	if (state->refresh_cache) {
>> 		assert(state->istate);
>> 		if (!fstat_done)
>> -			lstat(ce->name, &st);
>> +			if (lstat(ce->name, &st) < 0)
>> +				return error_errno("unable stat just-written file %s",
>> +						   ce->name);
> 
> s/unable stat/unable to stat/, I think.
> 
> Other than that, this looks fine to me.
> 
> -Peff