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[[!tag open_issue_glibc]]
# `sudo`
`sudo [task]` hands after finishing `[task]`.
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]].
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