This is the mail archive of the
cygwin
mailing list for the Cygwin project.
Re: 1.7.8: write fails with EAGAIN
Hi,
Hang on, you are saying that a *blocking* write(2) to a pipe returns
with EAGAIN? Are you sure? It would be quite a surprise if git would
actually do that. EAGAIN is only an expected error for non-blocking
I/O, so applications which use blocking I/O usually only test for EINTR.
since in the interesting case I'm writing to stdout (fd=1) I don't know
whether that was initially opened with O_NONBLOCK - but I wouldn't think so.
I was able to reproduce this as follows:
./writetest infile | cat > outfile
where infile is a "large" file.
The output is:
$ ./writetest infile | cat > test.out
writing 78954543 bytes...
result is -1, errno is 11
writing 78954543 bytes...
result is -1, errno is 11
...
This does not happen for "small" files:
$ ./writetest infile2 | cat > test.out
writing 10978848 bytes...
result is 10978848, errno is 0
Also, I tried this with the same cygwin version on Win7/64-bit and this
did not happen even for a 1GB file.
-Robert
--
Problem reports: http://cygwin.com/problems.html
FAQ: http://cygwin.com/faq/
Documentation: http://cygwin.com/docs.html
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple