forced fsck (again?)

[Bryan Kadzban]

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Theodore Tso wrote:
> So ---- for someone who has time, I offer the following challenge.
> Take the above script, and enhance it in the following ways:
> 
> 	* Read a configuration file to see which filesystem(s) to
>           check and to which e-mail the error reports should be sent.

Add support for checking multiple FSes, too.  :-)

> 	* Have the script abort the check if the system appears to be
>           running off of a battery.

Sort of.  Much of this on_ac_power function was stolen from Debian's
powermgmt_base package's on_ac_power script, but it doesn't support
anything other than ACPI.  (It checks the new sysfs power_supply class
first, and the /proc/acpi/ac_adapter/ directory second.)

If the function can't determine if AC power is available, the script
assumes it's on battery, and exits; this is suboptimal for desktops, but
good for laptops that don't have ACPI turned on for whatever reason.

> 	* Have the config file define a time period (say, 30 days),
>           and have the script test to see if the last_mount time is
>           greater than the time interval.  If it is, then it does the
>           check, otherwise it skips it.

Well, this script looks at the last-check time, not the last-mount time.
But close enough.

> With these enhancements, in the laptop case the script could be fired
> off by cron every night at 3am, and if a month has gone by without a
> check, AND the laptop is running off the AC mains, the check happens
> automatically, in the background.

See the attached script (e2check) and sample config file (e2check.conf).
:-)
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