kotovalexarian-likes-github/moby--moby
1
0
Fork 0
mirror of https://github.com/moby/moby.git synced 2022-11-09 12:21:53 -05:00
Code Releases Activity

Synchronize the cursor returned by followJournal

Browse source 
Make sure that the cursor value returned by followJournal() is the last
of the values returned by its goroutine's calls to drainJournal() by
waiting for it, rather than returning a value that may be superceded by
another if we're singalling the goroutine that it should exit by closing
a pipe.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>
This commit is contained in:
Nalin Dahyabhai 2017-02-22 16:22:00 -05:00
parent 4534dcd494
commit d57c330617
1 changed files with 5 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
daemon/logger/journald/read.go
View file

@ -246,6 +246,8 @@ func (s *journald) followJournal(logWatcher *logger.LogWatcher, config logger.Re
s.readers.readers[logWatcher] = logWatcher
s.readers.mu.Unlock()
newCursor := make(chan *C.char)
go func() {
for {
// Keep copying journal data out until we're notified to stop
@ -274,6 +276,7 @@ func (s *journald) followJournal(logWatcher *logger.LogWatcher, config logger.Re
s.readers.mu.Unlock()
C.sd_journal_close(j)
close(logWatcher.Msg)
newCursor <- cursor
}()
// Wait until we're told to stop.
@ -283,6 +286,8 @@ func (s *journald) followJournal(logWatcher *logger.LogWatcher, config logger.Re
C.close(pfd[1])
}
cursor = <-newCursor
return cursor
}