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Message-ID:
<MR1P264MB2481E332F0FB7A51B6A7FD7BC06A2@MR1P264MB2481.FRAP264.PROD.OUTLOOK.COM>
Date: Thu, 26 Sep 2024 09:08:59 +0000
From: "Jef STEELANT (EXT)" <jef.steelant_ext@...tathome.com>
To: "musl@...ts.openwall.com" <musl@...ts.openwall.com>
Subject: syslog does not detect a closed file descriptor
The syslog implementation does not detect if the file descriptor of /dev/log is closed, and keeps on logging to an invalid fd.
This happens for instance when using lxc with musl libc ( see issue https://github.com/lxc/lxc/issues/4485). LXC will at a certain point close the fd of /dev/log, in the assumption that a next call to syslog will detect an EBADF when writing data, and that the log will be reopened. glibc does this, but musl does not. It would be better if syslog would either stop logging to the invalid fd, or reopen the log when s send returns EBADF.
Jef
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