Declaration of crypt

Eric Blake
Thu Jun 9 14:16:00 GMT 2016

On 06/09/2016 08:07 AM, Ken Brown wrote:
> On 6/9/2016 8:32 AM, Corinna Vinschen wrote:
>> Can you please define crypt, encrypt and setkey explicitely in unistd.h
>> per POSIX, rather than including crypt.h?  This would not only be target
>> independent, it would also be more correct.  As a side effect I will
>> have to come up with a new version of the crypt package, because our
>> crypt.h is using a wrong prototypes for setkey (const is missing).
> setkey is supposed to be in stdlib.h rather than unistd.h, so I've done
> that.
> One minor question about encrypt: The Posix prototype has 'char
> block[64]' as the first argument, but Cygwin's crypt.h simply has 'char
> *block'.  FreeBSD and glibc also use 'char *block', so I did the same.

The two are identical, according to C rules.  Using [64] rather than *
gives a bit more indication about the size of the array that must be
passed, but doesn't change the compiler behavior.

> Or would you rather follow Posix here?
>> Thanks a lot and sorry again,
> No problem.  Revised patch attached.
> Ken

Eric Blake   eblake redhat com    +1-919-301-3266
Libvirt virtualization library

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