Re: [PATCH] errno.3: add some comments on EAGAIN/EWOULDBLOCK and EDEADLK/EDEADLOCK

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Hello Rasmus,

On 8/29/19 12:06 PM, Rasmus Villemoes wrote:
> Signed-off-by: Rasmus Villemoes <rv@xxxxxxxxxxxxxxxxxx>
> ---
>  man3/errno.3 | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)

Thanks. I applied and tweaked a little.

Thanks,

Michael

> diff --git a/man3/errno.3 b/man3/errno.3
> index 6cbbafed5..794be7c7b 100644
> --- a/man3/errno.3
> +++ b/man3/errno.3
> @@ -94,7 +94,7 @@ must have distinct values, with the exception of
>  .B EAGAIN
>  and
>  .BR EWOULDBLOCK ,
> -which may be the same.
> +which may be the same. On Linux, these two always have the same value.
>  .PP
>  The error numbers that correspond to each symbolic name
>  vary across UNIX systems,
> @@ -240,8 +240,9 @@ Connection reset (POSIX.1-2001).
>  Resource deadlock avoided (POSIX.1-2001).
>  .TP
>  .B EDEADLOCK
> -Synonym for
> +On most platforms, a synonym for
>  .BR EDEADLK .
> +On some (e.g. Linux mips, powerpc, sparc), it is a separate error code "File locking deadlock error".
>  .TP
>  .B EDESTADDRREQ
>  Destination address required (POSIX.1-2001).
> 


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/



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