Steve wrote:
> First, thank you for the help on my previous query.
>
> I am still working on porting a c++ application from RTAI to Xenomai,
> and have encountered a problem with sockets, specifically the select
> function.
>
> When Xenomai is not being used the code runs as expected. Once the
> Xenomai headers, compile options, etc, are used the select function
> fails with the error EFAULT. I have reproduced the error (works
> without Xenomai, EFAULTs with Xenomai) using the following program:
>
> #include <stdio.h>
> #include <arpa/inet.h>
> #include <errno.h>
>
> int handleError(char *msg, int err);
>
> int main(void)
> {
> int sfd;
> struct sockaddr_in sai;
> fd_set SockSet;
> struct timeval tv;
> tv.tv_sec = 2;
> tv.tv_usec = 0;
>
> sai.sin_family = AF_INET;
> sai.sin_port = htons(1025);
> sai.sin_addr.s_addr = htonl(INADDR_ANY);
>
> if((sfd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
> { return handleError("creation error", errno); }
>
> if(bind(sfd, (struct sockaddr*)&sai, sizeof(sai)) == -1)
> { return handleError("bind error", errno); }
>
> if(listen(sfd, 5) == -1)
> { return handleError("listen error", errno); }
>
> FD_ZERO(&SockSet);
> FD_SET(sfd, &SockSet);
>
> if(select(sfd+1, &SockSet, 0, 0, &tv) == -1)
> { return handleError("select error", errno); }
>
> printf("success\n");
>
> return 0;
> }
>
> I am using Xenomai 2.4.6.1 on a vanilla 2.6.24.6 Linux kernel, and
> running on Ubuntu 8.04.
Could you try 2.4.7, to see if you are not having a bug which has
already been fixed?
What you are trying should work, even though you are not really using
Xenomai's select but Linux plain select.
--
Gilles.
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