interacts with the telnet/rlogin server on AIX. The previous entries
about this only starting at ML03 and above seem to be correct. The bug
is not triggered in earlier versions of AIX.
Unfortunately, I have been unable to create a test case program that
causes the hang to occur. However, a simple hack to channels.c does
seem to fix the problem:
--- channels.c.orig Tue Jul 2 14:34:32 2002
+++ channels.c Tue Jul 2 14:35:39 2002
@@ -1278,6 +1278,9 @@
buffer_len(&c->output) > 0) {
data = buffer_ptr(&c->output);
dlen = buffer_len(&c->output);
+ /* XXX - hack - do not apply - LBB */
+ if (dlen > 8192)
+ dlen = 8192;
len = write(c->wfd, data, dlen);
if (len < 0 && (errno == EINTR || errno == EAGAIN))
return 1;
I've not tried all possible combinations for the magic number
"8192".
But, a value of 16384 is too big (does not fix the problem). I've not
encountered a hang after applying this patch (although I got bored after
5 or 10 minutes).
I'd be interested in seeing if that hack fixes the problems others are
seeing, and if there is a case for capping the max size of a write to
tty devices, or if some other clean solution can be applied.
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