Posted in Linux on 15 Apr 2008 at 21:07 UTC

To reboot Linux you use a syscall named reboot, the reboot(2) manpage shows that the libc reboot() function should have the same arguments as the syscall:

int reboot(int magic, int magic2, int flag, void *arg);

However, the uClibc developers decided to be clever, they instead made a reboot() function that takes a single argument (flag), of course they don't include a declaration in the headers, then you would KNOW they don't use the normal arguments. After several hours of debugging and finding that flag was 4276215469 (magic1) in sys_reboot() I eventually downloaded the uClibc source, lo and behold!

int reboot(int flag)
{
	return (_reboot((int) 0xfee1dead, 672274793, flag));
}

This has been very productive.

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