| commit | 39bcfd940e45f91cd6b323f8e961b671e2043e99 | [log] [tgz] |
|---|---|---|
| author | Jiyong Park <jiyong@google.com> | Sat Jun 26 00:31:25 2021 +0900 |
| committer | Jiyong Park <jiyong@google.com> | Sat Jun 26 04:09:03 2021 +0900 |
| tree | fceed0bba090b63f5735ecf91ac474c30841d9ea | |
| parent | d7178e8a4e3e5f7ca00249ce8244b96d12eb217f [diff] |
Open /dev/kmsg in Android In Android, ordinary processes don't have privilege to open /dev/kmsg. That has been done by letting init open it (via `file /dev/kmsg w`) and share the file descriptor with the forked process. The file descriptor number is passed via an environment variable. Implement the procedure. Bug: 189805435 Test: m Change-Id: I8e39c9bd506fdc9d37a7fb5cd2b14e7d4a5074b7
Logger implementation for low level kernel log (using /dev/kmsg)
Usually intended for low level implementations, like systemd generators, which have to use /dev/kmsg:
Since syslog is not available (see above) write log messages to /dev/kmsg instead.
[dependencies] log = "0.4" kernlog = "0.3"
#[macro_use] extern crate log; extern crate kernlog; fn main() { kernlog::init().unwrap(); warn!("something strange happened"); }
Note you have to have permissions to write to /dev/kmsg, which normal users (not root) usually don't.