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From: Jon Grant <jg-hus3n9K41k0@public.gmane.org>
To: mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Cc: linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: errno man page query
Date: Sun, 22 Apr 2012 12:17:22 +0100	[thread overview]
Message-ID: <4F93E8C2.5000903@jguk.org> (raw)

Hello

Quoting from this page:

http://man7.org/linux/man-pages/man3/errno.3.html

"a function that succeeds is allowed to change errno."

^ This sounds clear, e.g. open() can change errno to 0, when it returns 
a valid fd handle.


"Valid error numbers are all nonzero; errno is never set to zero by any 
system
        call or library function."

^ This seems to be counter what the earlier line said. Therefore, open() 
wouldn't be allowed to change errno to 0.

Have I missed something?

Best regards, Jon
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             reply	other threads:[~2012-04-22 11:17 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-22 11:17 Jon Grant [this message]
     [not found] ` <4F93E8C2.5000903-hus3n9K41k0@public.gmane.org>
2012-04-22 21:14   ` errno man page query Michael Kerrisk (man-pages)

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