Re: ioctl always returns 0
Re: ioctl always returns 0
- Subject: Re: ioctl always returns 0
- From: Vincent Lubet <email@hidden>
- Date: Thu, 4 Mar 2004 07:26:41 -0800
On Mar 3, 2004, at 10:59 PM, Mahesh Vyas wrote:
ioctl(mSocket,FIONREAD,&lDgramSize) always returns 0 irrespective of
socket
is closed or open.
Our aim is , when client quits server should find out with above API
whethe
client still running or not.
This is not the correct way to find out the peer is disconnected.
Rather you should use recv() with the MSG_PEEK flags:
n = recv(mSocket, &buffer, 1, MSG_PEEK);
if (n == -1)
if (errno == EWOULDBLOCK)
no data
else
other error handling
else if (n == 1)
data is available
else if (n == 0)
peer is disconnected
Vincent
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