'for' loop initial declarations are only allowed in C99 modeAfter a little bit of research, in Eclipse, go to Project > Properties > C/C++ Build > Settings > GCC C Compiler > Miscellaneous > add "-std=c99" to the "Linker Flags" text field.
http://www.eclipse.org/forums/index.php?t=msg&goto=212981&
undefined reference to `sqrt'After a little bit of research, in Eclipse, go to Project > Properties > C/C++ Build > Settings > GCC C Linker > Miscellaneous > add "-lm" to the "Linker Flags" text field. That way it is properly linked to the project.
http://cboard.cprogramming.com/c-programming/88943-undefined-reference-sqrt.html
sudo ifconfig wlan0 down - turn device off sudo ifconfig wlan0 hw ether XX:XX:XX:XX:XX:XX - set the mac you want sudo ifconfig wlan0 up - turn device on
sudo ip addr - show config sudo ip link set dev wlan0 address XX:XX:XX:XX:XX:XX - set the mac you want
sudo pico /etc/network/interfaces - edit your network devices - add hwaddress ether XX:XX:XX:XX:XX:XX to your device
Install: Install: sudo apt-get install macchanger macchanger -s wlan0 - shows the current mac on the device macchanger -mac wlan0 XX:XX:XX:XX:XX:XX - set the mac you want
Old Ways:
You can change host name in Gingerbread:
> go to Settings -> Applications -> Development -> Device hostname or
Settings -> Wireless & networks -> Bluetooth settings -> Device name
Using adb shell, then
> hostname NAME or edit /proc/sys/kernel/hostname
echo NAME > /proc/sys/kernel/hostname
Using adb shell with busybox installed
> busybox hostname NAME
Best Way:
This worked for my Droid X, .602+ Rooted was using adb shell, then:
getprop net.hostname
setprop net.hostname NAME
Since the above code gets reset after each reboot, here is what else
I have found:
after
editing net.hostname
># getprop net.hostname
android_430217a864834bd5
># setprop net.hostname NAME
after the reboot it reverts to android_
so, hook your phone up to your computer:
your computer > adb > phone
> adb shell
> su
- always backup all files first
> cp /data/data/com.android.providers.settings/databases/settings.db
/data/data/com.android.providers.settings/databases/settings.db.backup
> cp /data/data/com.android.providers.settings/databases/settings.db
/mnt/sdcard/settings.db
> rm /data/data/com.android.providers.settings/databases/settings.db
now click disk storage on the usb to access the mnt on your own computer
your computer > access your sdcard
> file settings.db
Ex. settings.db: SQLite 3.x database, user version 57
> sqlite3 settings.db
to show databases:
sqlite> .databases
seq name file
--- --------------- ------------------------------
0 main /media/249A-11E0/z/settings.db
to show tables:
sqlite> .tables
android_metadata bookmarks system
bluetooth_devices secure
to show the column names:
sqlite> .schema secure
CREATE TABLE secure (_id INTEGER PRIMARY KEY AUTOINCREMENT,name TEXT
UNIQUE ON CONFLICT REPLACE,value TEXT);
CREATE INDEX secureIndex1 ON secure (name);
The column names go from left to right: _id, name, value.
now select the table, secure, this command with show everything:
sqlite> select * from secure;
Here I picked id = 24, this is where my id was.
sqlite> select * from secure where _id = "24";
24|android_id|
- just another way
sqlite> select * from secure where name = "android_id";
24|android_id|
- just another way
sqlite> select * from secure where value = "";
24|android_id|
We can easily change the "ID" value from the <16 digit id>
to any number. Here I changed it to 0:
sqlite> update secure set value = 0 where _id = 24;
Type .exit in order to exit.
sqlite> .exit
On the USB notification change from storage to charge to mount your
sdcard to your phone.
phone > sdcard
again
> adb shell
> su
> cp /mnt/sdcard/settings.db
/data/data/com.android.providers.settings/databases/settings.db
Now simply reboot your phone. You should now see "android_0" as your
new hostname. I know I didnt change the entire hostname, however I will
continue to look into this.