Re: CVS problem with ssh

[Richard M. Stallman]

    I just checked FreeBSD libc, and it appears that fflush fails once its
    underlying write fails with EAGAIN.  So it appears that this approach
    won't work under FreeBSD.  That's not a good sign.

Isn't that a bug in FreeBSD?

We can try to work around bugs in various systems, but it is not an
essential requirement that we do so.  If it is hard to work around
them, the best we can do is report them and hope they get fixed by and
by.

    Can you write a program to detect whether fflush reliably restarts?  I
    just wrote the program below to do that, derived from your code, and
    it fails for me both with Debian GNU/Linux 3.1 r0a and with Solaris
    10, so that's not a good sign either.

I am not sure what job that program does.  The program is too long for
me to read it just to try to figure that out.

However, if it is impossible to do this job reliably for fflush,
we can still adapt the solution to that fact, by using
  #define fflush undefined_fflush
so that people can modify the relevant apps not to use fflush.