message for the EIO error

message for the EIO error

[EXCOFFIER Denis]

Hello,

In the winsup directory (winsup/cygwin/errno.c), i can observe that the error
EIO is attributed the message "Input/Output error".
In the newlib directory (newlib/libc/sys/linux/dl/dl-minimal.c) the same EIO
is attributed the message "Input/output error".

This the same message, but not exactly. Shouldn't they be identical?

Regards.

Denis Excoffier.

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Re: message for the EIO error

[Christopher Faylor]

On Wed, Jun 15, 2011 at 08:51:09AM +0200, EXCOFFIER Denis wrote:
>Hello,
>
>In the winsup directory (winsup/cygwin/errno.c), i can observe that the error
>EIO is attributed the message "Input/Output error".
>In the newlib directory (newlib/libc/sys/linux/dl/dl-minimal.c) the same EIO
>is attributed the message "Input/output error".
>
>This the same message, but not exactly. Shouldn't they be identical?

Not necessarily.  We match linux, not newlib but linux also does not uppercase
the O so I've changed it.

Thanks for the heads up.

cgf

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Re: message for the EIO error

[Eric Blake]

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On 06/15/2011 12:51 AM, EXCOFFIER Denis wrote:
> Hello,
> 
> In the winsup directory (winsup/cygwin/errno.c), i can observe that the
> error
> EIO is attributed the message "Input/Output error".
> In the newlib directory (newlib/libc/sys/linux/dl/dl-minimal.c) the same
> EIO
> is attributed the message "Input/output error".
> 
> This the same message, but not exactly. Shouldn't they be identical?

No.  POSIX has no requirements on the exact context of the error
message, only that the message is distinct enough to map back to the
errno value it is associated with.  Cygwin doesn't use the newlib
strerror implementation, so it doesn't matter whether newlib's spellings
differ from cygwin's spellings.

Rather, cygwin prefers to match Linux' spelling unless there is good
reason to break Linux compatibility, and in this case, Linux spells EIO
"Input/output error".

-- 
Eric Blake   eblake@redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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