Date: Wed, 5 Jul 2017 15:04:45 +0200 From: "Tobias C. Berner" <tcberner@freebsd.org> To: freebsd-hackers@freebsd.org Subject: How to use kevent to monitor removal of a socket-file Message-ID: <CAOshKte7jK1qEr0Cu4=zFbsL6U0QeA9y=-%2BjZ-O5bL_T%2BmFiFQ@mail.gmail.com>
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Hi there
I want to be notified once a given socket file, say '/var/run/socket.pipe'
gets deleted.
Something like
+---------------------------------------------+
| string path = "/var/run/socket.pipe"; |
| int fd = open(path, O_RDONLY); |
| EV_SET(&k, fd, ...); |
| kevent(..., &k, ...); |
+---------------------------------------------+
however does not work, as open(2) does not handle socket files, throwing
back
ENOTSUPP : An attempt was made to open a socket (not currently
implemented).
What is the proper way to monitor such files?
* Just monitoring the parent directory for changes, and look up whether the
file still exists each time?
* Connecting to the socket and using EVFILT_READ and wait for EOF?
Am I missing the obvious solution here?
mfg Tobias
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