Re: write() udp socket

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Sincerely yours
                         ZHOU Xiaobo
 
 
 
------------------ Original ------------------
From:  "Rick Jones"<redacted>;
Date:  Tue, Jul 26, 2011 01:38 AM
To:  "Huajun Li"<redacted>;
Cc:  "ZHOU Xiaobo"<redacted>; "netdev"<redacted>;
Subject:  Re: write() udp socket
 
On 07/24/2011 01:33 AM, Huajun Li wrote:

2011/7/23 ZHOU Xiaobo[off-list ref]:

quoted

question No1:
When I call
ssize_t write(int fd, const void *buf, size_t count);


on a nonblocking UDP socket, is the return value  always equal to 'count'?

I don't think so.  The function may be interrupt by signal or return
due to other reason, so the return value only represents the size it
writes successfully to the fd.

I believe it should either appaear to succeed or fail.  write() best not 
be sending partial UDP datagrams.  That would be "bad."



yeah, the same as I think. If so the answer of Question No.2 is 'yes' too?