Hardcoded KERNEL_O_LARGEFILE does not work on ARM

[Mike Kazantsev]

Running fatrace on aarch64 (armv8) results in following error:
Cannot initialize fanotify: Invalid argument

Looking at strace output, can see error coming from fanotify_init syscall:
fanotify_init(FAN_CLASS_NOTIF, O_RDONLY|O_NOFOLLOW) = -1 EINVAL (Invalid argument)

Which in the code is used as:
fan_fd = fanotify_init (0, KERNEL_O_LARGEFILE);

So there is a discrepancy in how strace interprets passed flags value (as "O_RDONLY|O_NOFOLLOW") vs what it is intended to represent ("O_LARGEFILE").

Replacing fanotify_init line in code with e.g. "fanotify_init(0, 0)" fixes the problem, again pointing at hardcoded KERNEL_O_LARGEFILE value to be the cause of error.

Maybe it can just be wrapped into #ifndef macros, and be defined (presumably for old x86 kernels) only when needed that way?

Also found same issue described here with regards to mips architecture:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=784983

[Martin Pitt (pitti)]

Fixed in https://launchpad.net/fatrace/trunk/0.14