scanning ...wiconfig: ioctl: No such file or directory

[Sverre Froyen <sverre%viewmark.com@localhost>]

Hi,

There have been a couple of reports about wiconfig -D failing on USB devices 
with the error given in the subject.  See

http://mail-index.netbsd.org/tech-net/2008/03/17/msg000294.html

The problem is not a failed ioctl call but rather that an already set errno is 
caught after the while loop in wi_apscan.  Initializing errno before the loop 
avoids the problem:


diff -u -r1.42 wiconfig.c
--- wiconfig.c  19 Apr 2009 01:52:09 -0000      1.42
+++ wiconfig.c  20 Jun 2009 00:01:19 -0000
@@ -201,6 +201,7 @@

        printf("scanning ...");
        fflush(stdout);
+       errno = 0;
        while (ioctl(s, SIOCGWAVELAN, &ifr) == -1) {
                retries--;
                if (retries >= 0) {


Strangly, errno gets set by the printf("scanning...") statement just before 
the loop.

Regards,
Sverre