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MFC r274023:

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When other end of the pipe closed during the write, but some bytes
were written, return short write instead of EPIPE.
This commit is contained in:
kib 2014-11-17 00:59:45 +00:00
parent caa11c2b5a
commit 942f0f69dc
1 changed files with 5 additions and 5 deletions
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10
sys/kern/sys_pipe.c
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@ -1293,13 +1293,13 @@ pipe_write(fp, uio, active_cred, flags, td)
} }
/* /*
* Don't return EPIPE if I/O was successful * Don't return EPIPE if any byte was written.
* EINTR and other interrupts are handled by generic I/O layer.
* Do not pretend that I/O succeeded for obvious user error
* like EFAULT.
*/ */
if ((wpipe->pipe_buffer.cnt == 0) && if (uio->uio_resid != orig_resid && error == EPIPE)
(uio->uio_resid == 0) &&
(error == EPIPE)) {
error = 0; error = 0;
}
if (error == 0) if (error == 0)
vfs_timestamp(&wpipe->pipe_mtime); vfs_timestamp(&wpipe->pipe_mtime);