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author | Neil Jerram <neil@ossau.uklinux.net> | 2010-06-10 23:40:41 +0100 |
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committer | Neil Jerram <neil@ossau.uklinux.net> | 2010-07-01 22:16:54 +0100 |
commit | 6069e9733163cf802e806bfa55cb4fcc54fc6ac7 (patch) | |
tree | da25b8683b86ee6b5ee9e94513e7f82171f0d8c6 /libguile/strings.h | |
parent | d5e0eb579798067b411aa36ad7f21eb0cd16ef07 (diff) | |
download | guile-6069e9733163cf802e806bfa55cb4fcc54fc6ac7.tar.gz |
Fix hanging of popen.test
The "open-output-pipe":"no duplicate" test has been hanging, on and
off, and not completely reliably, for a few years. It's now doing so
fairly reliably for me, and investigation shows that
- the child shell process is in a tight loop (99% CPU)
- the parent Guile process is stuck calling waitpid().
The problem is that the child hasn't got the SIGPIPE that the test
intends, and so is continuing to echo "closed" forever; and Guile is
waiting for it to terminate, forever.
I haven't fully debugged the SIGPIPE problem, but it sounds very like
what Chet Ramey describes here:
http://old.nabble.com/Re%3A-SIGPIPE-not-properly-reset-with-%27trap---PIPE%27-p20985595.html.
(And my version of bash is 3.2.39.)
So, a fix should be to use something other than shell to implement the
child; and it appears that this works.
* check-guile.in (TEST_SUITE_DIR): Export.
* test-suite/tests/popen-child.scm: New script file.
* test-suite/tests/popen.test ("open-output-pipe", "no duplicate"):
Use Guile for the child process, instead of shell.
Diffstat (limited to 'libguile/strings.h')
0 files changed, 0 insertions, 0 deletions