Power Log Collector
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This Power Log Collector boots an XO-1 or XO-1.5 and copies the power logs to itself before shutting the laptop down.
Note: will not work on secured laptops without signing.
Does not work for XO-1.75 yet.
How to Use
- Download Power-log-collector.tar.bz2 and unpack onto a USB flash drive,
- Shut down the XO,
- Insert the USB drive, and
- Turn on the XO.
The XO will collect the power logs, print a message saying has done so and then shut down.
Theory of Operation
- Based on Tiny Core Linux,
- An Open Firmware Boot Script selects the XO-1 or XO-1.5 kernel,
- The initial ramdisk mounts /dev/sda (which should be the first USB drive), and
- executes rc.local on that drive, which does the collection.
How it was Made
It was made by remastering Tiny Core Linux.
Unpack the initial ramdisk to the current directory:
# gunzip <../initrd.gz | cpio -i
Modify the files as needed, then repack the initial ramdisk:
# find | sudo cpio -o -H newc --quiet | gzip -2 > ../initrd.gz
Then assemble into a .tar.bz2 for download.
rc.local
The script that does the collection:
#!/bin/sh uname -a | grep _xo1- if [ $? -eq 0 ] then echo detected xo-1.0 XO_ROOT=mtdblock0 XO_FS=jffs2 else echo detected xo-1.5 XO_ROOT=mmcblk0p2 XO_FS=ext3 fi mkdir -p /mnt/$XO_ROOT mount -t $XO_FS -o ro /dev/$XO_ROOT /mnt/$XO_ROOT mkdir -p /mnt/sda1/power-logs cp /mnt/$XO_ROOT/home/olpc/power-logs/* /mnt/sda1/power-logs umount /mnt/$XO_ROOT mount /dev/sda1 /mnt/sda1 -o remount,ro sync echo Power Logs Recovered echo Shutting down in 10 seconds echo You may remove the USB now sleep 10 poweroff
OpenFirmware Alternative
Place this as boot/olpc.fth on an ext2 USB drive:
\ OLPC Power Log Collection Script visible no-page ." Power Log Collection" cr dir int:2,\home\olpc\power-logs\pwr* : force-overwrite ( path$ -- continue? ) type cr true ; patch force-overwrite ?delete-file $copy1 ." Copying, please standby." cr copy int:2,\home\olpc\power-logs\pwr* u:\ ." Power Logs Recovered" cr ." Shutting down in 10 seconds" cr ." You may remove the USB drive now" cr green-screen d# 10000 ms power-off