| commit | d74998a1509f0c81a74fe93e1a680bd78ec9a12a | [log] [tgz] |
|---|---|---|
| author | Miguel Flores Ruiz de Eguino <miguelfrde@fuchsia.infra.roller.google.com> | Fri Dec 15 04:03:02 2023 +0000 |
| committer | Copybara-Service <copybara-worker@google.com> | Thu Dec 14 20:04:14 2023 -0800 |
| tree | a164078c1f5bc0caad7d89fb3b96caf562422028 | |
| parent | 056510e1620812e17e18ca64b0c44f9e6c2cab84 [diff] |
[roll] Roll fuchsia [starnix] Implement read(/dev/kmsg) and syslog(SYSLOG_ACTION_READ_ALL)
This is a basic implementation of the syslog syscall as well as the
/dev/kmsg device.
For /dev/kmsg we support both blocking and non-blocking reads.
Pending:
- Should we be using DynamicFileSource for /dev/kmsg ? A general seek
support isn't appropriate, so I don't think we do. but we do seem
to need to support the following:
- SEEK_SET, 0: seek to get the first log
- SEEK_END, 0: seek to get the last log
- SEEK_DATA, 0: seek after the last log available after a
SYSLOG_ACTION_CLEAR was requested. dmesg allows to emit this action.
- Finish necessary syslog(2) action implementations. Mostly READ and
SIZE_UNREAD. Probably CLEAR too.
- Build /proc/kmsg
The current implementation makes me sad. This can be made more
efficient. To be scheduled. See b/315520045
Original-Bug: b/314198813
Original-Bug: b/315520045
Original-Fixed: b/315387149
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/955692
Original-Revision: 8173fa2284f7bcf139c6914dac0c5c4211303f42
GitOrigin-RevId: b300388bd31470d804f77e55a96d160aa5c797f9
Change-Id: I2205f79225bb7f88a304cbd8b9b86c4ec5b78e7e
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