linux-kernel - Re: Socket vs File descriptor

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Message-ID: <4ABB25A4.3050901@yoshifuji.org>
Date:	Thu, 24 Sep 2009 16:54:12 +0900
From:	"YOSHIFUJI Hideaki (吉藤 英明)" 
	<hideaki@...hifuji.org>
To:	KV Pavuram <kvpavuram@...oo.co.in>
CC:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: Socket vs File descriptor

KV Pavuram wrote:
> Is there any  ioctl call to determine if a given descriptor is a file descriptor or a socket descriptor.
> 
> Similarly, is there a way to find out a socket descriptor type ie.e if it is SOCK_STREAM, or SOCK_DGRAM type.

Maybe "lsof" command is your friend.

Or, depending on your purpose, you can use
getsockopt(), listen() etc. to get error
(e.g. ENOTSOCK) to test the type.

--yoshfuji
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