From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jon Grant Subject: Re: Is there a way to get "EINVAL" style string Date: Tue, 08 May 2012 22:33:45 +0100 Message-ID: <4FA99139.90102@jguk.org> References: <4F93E7FC.1020904@jguk.org> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-man-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org Cc: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: linux-man@vger.kernel.org Hi Michael On 22/04/12 22:25, Michael Kerrisk (man-pages) wrote: > Hi Jon, > > On Sun, Apr 22, 2012 at 11:14 PM, Jon Grant wrote: >> Hello >> >> I was looking at the man pages looking for a way to get a string of the >> errno value meaning. This is kind of a user question. >> >> This API returns "returns a pointer to a string that describes the error >> code": >> >> http://man7.org/linux/man-pages/man3/strerror.3.html >> >> However, this is a description, e.g. "Invalid argument". Is there a >> function that would return "EINVAL" or "ENOENT" as the string? > > None that I know of. (In passing, I dealt with exactly this problem > for my book with a script that generated the string names; see > http://man7.org/tlpi/code/online/dist/lib/ename.c.inc.html and > http://man7.org/tlpi/code/online/dist/lib/error_functions.c.html) Interesting. I saw on the ename.c page that the numbers were in the table hard coded -- is it guaranteed that 90 will always correspond to EPROTOTYPE on a unixy system? >> Could I suggest that the text on the man page be updated to clarify what >> would be returned: >> >> "returns a pointer to a string that describes the error code. e.g. "Invalid >> argument" if EINVAL was the errnum." > > Done for 3.40. Great, thank you! Jon -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html