Re: [NSPipe pipe] returning nil (running out of filehandles?)

FROM : Martin Redington
DATE : Wed Apr 02 02:04:29 2008

On 2 Apr 2008, at 00:46, Jean-Daniel Dupas wrote:

>
> Le 2 avr. 08 à 01:36, stephen joseph butler a écrit :

>> On Tue, Apr 1, 2008 at 6:20 PM, Martin Redington 
>> <m.<email_removed>>
>> wrote:
>>

>>> I'm running /sbin/md5 via an NSTask on a number of files (3,000 or
>>> so, with a new NSTask each time).

>>
>>
>> This would run a lot faster (and avoid fd issues) if you used 
>> libcrypto. Try
>> "man EVP_DigestInit" to get an idea of where to start.

>
>
> And this would not require libcrypto dependency if you use 
> CommonDigest that is part of the Mac OS X libSystem. (usr/include/
> CommonCrypto/CommonDigest.h) and that is not more complexe than EVP:
>
> extern unsigned char *CC_MD5(const void *data, CC_LONG len, 
> unsigned char *md);


Ah, that's interesting, although I think I have other libcrypto 
dependencies anyway.

It looks like the incremental functions are the ones I want. The 
duplicate files tend to be small in practice (surprisingly so, 
actually), but can be of arbitrary sizes.

>
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