maemo.org - Talk - View Single Post - Worse brightness setttings than OS2007

fanoush	2008-01-11 , 09:02
Posts: 2,152 \| Thanked: 1,490 times \| Joined on Jan 2006 @ Czech Republic	#42

Originally Posted by rm_you

an strace is here: http://pastebin.ca/850430
I'm not sure how to interpret that... I have done some strace interpretation for an Operating Systems class once, but nothing this complex.

Here is my try from 770, your strace build seems to not to resolve syscalls etc which makes it a bit more hard

Code:

Nokia-770-36:/# strace /usr/sbin/dsmetest -l 1
execve("/usr/sbin/dsmetest", ["/usr/sbin/dsmetest", "-l", "1"], [/* 47 vars */]) = 0
..
..
..
brk(0)                                  = 0x12000
brk(0x13000)                            = 0x13000
socket(PF_FILE, SOCK_STREAM, 0)         = 3
connect(3, {sa_family=AF_FILE, path="/tmp/dsmesock"}, 112) = 0
fcntl(3, F_SETFL, O_RDONLY|O_NONBLOCK)  = 0
write(3, "\f\0\0\0\206\2\0\0\1\0\0\0", 12) = 12
write(1, "brightness reqyest sent!\n", 25brightness reqyest sent!
) = 25
close(3)                                = 0
_exit(0)                                = ?

So basically it is the

Code:

write(3, "\f\0\0\0\206\2\0\0\1\0\0\0", 12) = 12

line. When starting with -l 2 it becomes

Code:

write(3, "\f\0\0\0\206\2\0\0\2\0\0\0", 12) = 12

or when using strace -x (print in hex) it becomes

Code:

write(3, "\x0c\x00\x00\x00\x86\x02\x00\x00\x02\x00\x00\x00", 12) = 12

In your output the line is
write(3, "\f\0\0\0\211\2\0\0d\0\0\0", 12) = 12
ASCII code for 'd' is 100 so it makes some sense. The beginning is perhaps some version handshake or structure size or something.

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Last edited by fanoush; 2008-01-11 at 09:07.

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