Also - you cannot use select() on file handles. Only sockets.
Kind regards,
Carsten Sørensen
On Mon, Jun 16, 2008 at 17:15, Danny Backx <[EMAIL PROTECTED]> wrote:
> I believe you need to call WSAStartup before any winsock call. That's a
> difference between sockets on Unix (Linux, ..) and on Windows.
>
> Danny
>
> On Mon, 2008-06-16 at 22:21 +0900, Lance Fetters wrote:
>> Target: Windows Mobile 6.0
>> Compiler: cegcc (both 0.51.0 and SVN (updated 2008-06-14))
>>
>> I'm having issues getting select() to work on my target; note that I
>> have yet to try testing other targets.
>>
>> When I tried to run the sample code included in the glibc man-page, I
>> found that it would segfault on the select() call. I then compiled it as
>> static and ran it remotely under gdb, and found that it was crashing at
>> newlib/libc/src/wince/msnet.c:175 (in the __MS_select):
>>
>> return( (*select)(nfds, rfds, wfds, efds, timeout));
>>
>> The problem appears to be that __msnet_init() is never called, and so
>> the select function pointer is NULL.
>>
>> I added a call to __msnet_init() to the sample code below and tried
>> running it again; this time it didn't crash, but unfortunately it
>> returned the following error (via perror()):
>>
>> select(): Bad file number
>>
>> Does anyone have any idea what the problem might be?
>> Is this, perhaps, an issue with WM6?
>>
>> Sample code follows:
>>
>> #include <stdio.h>
>> #include <stdlib.h>
>> #include <sys/time.h>
>> #include <sys/types.h>
>> #include <unistd.h>
>>
>> int
>> main(void)
>> {
>> fd_set rfds;
>> struct timeval tv;
>> int retval;
>>
>> /* __msnet_init(); */
>>
>> /* Watch stdin (fd 0) to see when it has input. */
>> FD_ZERO(&rfds);
>> FD_SET(0, &rfds);
>>
>> /* Wait up to five seconds. */
>> tv.tv_sec = 5;
>> tv.tv_usec = 0;
>>
>> retval = select(1, &rfds, NULL, NULL, &tv);
>>
>> /* Dont rely on the value of tv now! */
>> if (retval == -1)
>> perror("select()");
>> else if (retval)
>> printf("Data is available now.\n");
>> /* FD_ISSET(0, &rfds) will be true. */
>> else
>> printf("No data within five seconds.\n");
>>
>> exit(EXIT_SUCCESS);
>> }
>>
>>
>> Cheers,
>>
> --
> Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info
>
>
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