Remove unintended sleep while upgrading - and possibly pave the way for Ksplice use

[glennmh]

The purpose of this suggestion is tofold; remove unintended sleep while upgrading - and possibly pave the way for Ksplice use.

Divide packages start sequence in:

• Runlevel 3: Network (USB, Wifi, CPU, Screen) Mokonnect or other wifi/USB management must still be usable at this level.
• Runlevel 4: FSO middleware
• Runlevel 5: GSM/GPRS, SMS and other processes that needs/depends on FSO middleware.

-

Going below runlevel 4 simply disables FSO powersave so the phone, USB and wifi can not go to sleep.

And going to runlevel 4 enables FSO powersave.

-

Opkg upgrade "script" to make ksplice possible or counteract unintended sleep while upgrading:

• Check if battery are at least 66% charged - OR at least 33% charged and being powered via USB else exit.
• If GPRS is active internet connection do simulated upgrade that result in all needed packages being downloaded (if enough (swap-)space).
• Upgrade packages that can be upgraded, without "breaking" processes and services on level 5 and lower.
• If more packages; Enter runlevel 4; Upgrade packages that can be upgraded, without "breaking" processes and services on level 4 and lower.
• If more packages; Enter runlevel 3; Upgrade the rest.
• Enter runlevel 5.

[glennmh]

Ksplice suggestion is at #834.

[TAsn]

see my comment at: http://trac.shr-project.org/trac/ticket/834#comment:10