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Author SHA1 Message Date
Stefan Siegel
8cd7970b98 [stable-2.7] Always use /proc/sys/kernel/random/boot_id to confirm reboot on Linux (#47017)
* Always use /proc/sys/kernel/random/boot_id to confirm reboot on Linux

/proc/sys/kernel/random/boot_id is available since kernel 2.3.16 and
should be safe to rely on.

The previously used method by checking the system boot time using who -b
turned out to be unreliable: Some systems lacking an RTC report the Unix
epoch as boot time, but the code trying to detect that did't always
work.

Closes #46562

* Change DEFAULT_BOOT_TIME_COMMAND

- change to usinsg /proc by default
- add BOOT_TIME_COMMANDS for BSD, Solaris, and macOS
(cherry picked from commit ae7b9ea8cd)

Co-authored-by: Stefan Siegel <ssiegel@sdas.net>
2018-11-09 10:06:24 -08:00