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KR1 and GPSd Technical Discussion :: EVDOforums.com: "tz1



Joined: 29 Sep 2005
Posts: 205
Location: http://kr1gps.dyndns.org:8888/

PostPosted: Tue Feb 21, 2006 12:09 am Post subject: Reply with quote
I've been too busy hacking the utilities to notice.

It has a 24 byte header which I've not decoded in this late hour, and a gzipped image (which does not contain a proper CRC and length ending) which is the kernel prepended to the romfs image. The trailing bytes are a serial number, 'WL-EVDORT-...'.

(dd if=run-KR1... skip=24 of=run.bin.gz will extract the compressed portion).

It appears 'diagnostic' has been disabled. I will have to find the romfs and see if I can pull that out into a tree. (find the rom1fs? header)

I should be able to modify or edit it, and then, reinsert it.

Has anyone tried this update? Does 'ps' show diagnostic running or not?
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tz1



Joined: 29 Sep 2005
Posts: 205
Location: http://kr1gps.dyndns.org:8888/

PostPosted: Tue Feb 21, 2006 12:21 am Post subject: Reply with quote
yep.

Note it uses gzip -9 - a header in the gzipped image indicates maximum compression and gzip -9 run.bin recreates the identical image except for the modification time.

dd if=run.bin bs=1 skip=3186752 of=newrom.fs

you can mount or romfsck to extract the files.

Diagnostic has been commented out in /etc/rc, /bin/webs (the httpd plus lots of junk program) has changed, probably the misc. config page changes, and ath_pci.o has changed. As well as /etc/version.

Now do I want to be brave and replace the '#diagnostic /dev/ttyS1... &' line with 'telnetd &' with hexedit in run.bin and repack..."
- posted by Gp @ 7:16 AM