[Bluez-devel] rctest.c : question about do_listen function

[Bluez-devel] rctest.c : question about do_listen function

[theresa g.]

hello everyone,

I have looked at the rctest.c file (inside the bluez-utils-2.11/test 
directory) to get insight on how to write my own server app.  It all makes 
sense, except for the listen() call inside the do_listen function, which 
follows:

	if( listen(s, 10) ) {
		syslog(LOG_ERR,"Can not listen on the socket. %s(%d)", strerror(errno), 
errno);
		exit(1);
	}

I'm somewhat of a newbie to all this stuff (including sockets) so I question 
why the listen return is being checked for a 1 for error when the man pages 
say -1 is returned on error and 0 is returned on success.

Insight to this would really be appreciated!

Thanks in advance,
Theresa




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Re: [Bluez-devel] rctest.c : question about do_listen function

[Lars Grunewaldt]

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Hash: SHA1

|     if( listen(s, 10) ) {
|         syslog(LOG_ERR,"Can not listen on the socket. %s(%d)",
| strerror(errno), errno);
|         exit(1);
|     }
|
| I'm somewhat of a newbie to all this stuff (including sockets) so I
| question why the listen return is being checked for a 1 for error when
| the man pages say -1 is returned on error and 0 is returned on success.

If I'm not totally wrong, only "0" is treated as false, why all non-zero
values are treated as "true", so the comparison is true for -1...

greetings,
~  Lars
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Re: [Bluez-devel] rctest.c : question about do_listen function

[theresa g.]

hey thanks, i think you may be correct about that assumption.

theresa




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