Lorenz Bauer 09d0b46ab6 journal: refresh cached credentials of stdout streams ... journald assumes that getsockopt(SO_PEERCRED) correctly identifies the process on the remote end of the socket. However, this is incorrect according to man 7 socket: The returned credentials are those that were in effect at the time of the call to connect(2) or socketpair(2). This becomes a problem when a new process inherits the stdout stream from a parent. First, log messages from the child process will be attributed to the parent. Second, the struct ucred used by journald becomes invalid as soon as the parent exits. Further sendmsg calls then fail with ENOENT. Logs for the child process then vanish from the journal. Fix this by using recvmsg on the stdout stream, and refreshing the cached struct ucred if SCM_CREDENTIALS indicate a new process. Fixes #13708		2019-11-05 10:41:03 +01:00
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Makefile
test-journal.sh	journal: refresh cached credentials of stdout streams	2019-11-05 10:41:03 +01:00
test.sh	test: add function to reduce copied setup boilerplate	2019-10-08 09:10:12 +02:00