Found Serious Bug in 2.1.x Kernels
I believe that I have found a bug in 2.1.x kernels that is rather serious.
In short, read(fd, buffer, 0) returns a -1 with errno = EAGAIN.
According to the manpage, read(fd, buffer, 0) should *always* return 0
>From the manpage:
If count is zero, read() returns zero and has no other
results. If count is greater than SSIZE_MAX, the result
is unspecified.
Would someone care to confirm this?
It has been demonstrated on a 2.1.76 kernel machine.
The Boa Webserver that I help maintain exhibited this bug, as noticed by
Christoph Lameter <chris@waterf.org>. I would like to thank Christoph
for helping me track down this bug, as his input and gracious access to a
2.1.x machine helped immensely.
--
Jon Nelson
U of MN Housing and Res. Life Computing Supervisor
nels0988@tc.umn.edu
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