[PATCH] if_nametoindex.3: add possible errno for if_nametoindex()

[PATCH] if_nametoindex.3: add possible errno for if_nametoindex()

[Douglas Caetano dos Santos]

Checked against glibc and kernel code: when given name isn't a valid interface,
kernel returns ENODEV and glibc just forwards it.

Signed-off-by: Douglas Caetano dos Santos <douglascs-6ANAkuZINJhwFqzsTH5u/w@public.gmane.org>
---
 man3/if_nametoindex.3 | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/man3/if_nametoindex.3 b/man3/if_nametoindex.3
index 9689cdbd7..cfe49bc91 100644
--- a/man3/if_nametoindex.3
+++ b/man3/if_nametoindex.3
@@ -67,6 +67,14 @@ on error, NULL is returned and
 .I errno
 is set appropriately.
 .SH ERRORS
+.BR if_nametoindex ()
+may fail and set
+.I errno
+if:
+.TP
+.B ENODEV
+No interface found with given name.
+.PP
 .BR if_indextoname ()
 may fail and set
 .I errno
-- 
2.12.1

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Re: [PATCH] if_nametoindex.3: add possible errno for if_nametoindex()

[Michael Kerrisk (man-pages)]

On 05/09/2017 04:45 PM, Douglas Caetano dos Santos wrote:
> Checked against glibc and kernel code: when given name isn't a valid interface,
> kernel returns ENODEV and glibc just forwards it.

Thanks, Douglas. Applied.

Cheers,

Michael


> Signed-off-by: Douglas Caetano dos Santos <douglascs-6ANAkuZINJhwFqzsTH5u/w@public.gmane.org>
> ---
>  man3/if_nametoindex.3 | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/man3/if_nametoindex.3 b/man3/if_nametoindex.3
> index 9689cdbd7..cfe49bc91 100644
> --- a/man3/if_nametoindex.3
> +++ b/man3/if_nametoindex.3
> @@ -67,6 +67,14 @@ on error, NULL is returned and
>  .I errno
>  is set appropriately.
>  .SH ERRORS
> +.BR if_nametoindex ()
> +may fail and set
> +.I errno
> +if:
> +.TP
> +.B ENODEV
> +No interface found with given name.
> +.PP
>  .BR if_indextoname ()
>  may fail and set
>  .I errno
> 


-- 
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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