diff options
| author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2013-01-05 04:33:04 +0100 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2013-01-05 04:33:04 +0100 |
| commit | f92e5bd67a2a1d1116b175770e7706d6bf655de5 (patch) | |
| tree | d0050576ea1922901af2162eb93c4311fc384204 /open_issues/select_vs_signals.mdwn | |
| parent | 39bde0adf87b4e1ca6167a8fd1455d9ea87a4e9f (diff) | |
| download | web-f92e5bd67a2a1d1116b175770e7706d6bf655de5.tar.gz web-f92e5bd67a2a1d1116b175770e7706d6bf655de5.tar.bz2 web-f92e5bd67a2a1d1116b175770e7706d6bf655de5.zip | |
More details on having to make select interruptible by signal
Diffstat (limited to 'open_issues/select_vs_signals.mdwn')
| -rw-r--r-- | open_issues/select_vs_signals.mdwn | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/open_issues/select_vs_signals.mdwn b/open_issues/select_vs_signals.mdwn index bbd69d00..cdf39609 100644 --- a/open_issues/select_vs_signals.mdwn +++ b/open_issues/select_vs_signals.mdwn @@ -20,6 +20,17 @@ IRC, freenode, #hurd, 2011-04-02 <youpi> the sudo bug is select() not being able to get interrupted by signals +IRC, freenode, #hurd, 2012-01-05 + + <youpi> it's a know issue in select + <youpi> it's not interruptible by a SIGALRM for instance + <youpi> which is what ntpdate uses + <youpi> when __io_select is used, it *is* interruptible + <youpi> but when __mach_msg is used, it is *not* interruptible + <youpi> it happens that by luck, ntpdate uses just one fd, and thus it's __io_select which is used, and thus it gets an interruption after 1s (instead of after 60s, the timeout) + <youpi> with braunr's patch, it's __mach_msg which is used to wait, and thus the interruption doesn't happen, and we have to wait 60s, the timeout... + <youpi> so braunr's patch is still correct, it's the __mach_msg call which we do need to make interruptible (it was already on the todolist) + --- See also [[select]] and [[select_bogus_fd]]. |