permission denied errors

i've been getting permission denied errors (readonly) when accessing sfs
mounted files while using certain programs (openoffice and mutt for two).

i'm guessing it's an application problem as i can read and write files
fine using simple unix applications.

	cd /sfs/myhost
	cp $MAIL xyz
	ls -l xyz
	-rw-r--r--    1 mark   1209 Jun 23  2005 xyz
	mutt -f xyz

the mailbox is readonly using mutt, but i can clearly write to the file.
the same thing is true for openoffice.  vi works fine.

am i missing some magic foo for nfs or something?  perhaps something
to do with locking?  when i run the attached program in an sfs mounted
disk i get EIO as the error.

-- 
Mark Smith
[email protected]
mark at tux dot org
nova-instructor at tux dot org

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

main()
{
	int	  fd;

	if ((fd = open("x2", O_WRONLY | O_CREAT, 0666)) < 0)
	{
		perror("open");
		exit(1);
	}
	if (lockf(fd, F_LOCK, 0) < 0)
	{
		perror("lockf");
		exit(1);
	}
	exit(0);
}