On Sun, Nov 01, 2020 at 10:27:38PM +0100, Paweł Jasiak wrote:
> I am trying to run examples from man fanotify.7 but fanotify_mark always
> fail with errno = EFAULT.
>
> fanotify_mark declaration is
>
> SYSCALL_DEFINE5(fanotify_mark, int, fanotify_fd, unsigned int, flags,
> __u64, mask, int, dfd,
> const char __user *, pathname)
Don't worry about that. You aren't calling the SYSCALL, you're calling
glibc and glibc is turning it into a syscall.
extern int fanotify_mark (int __fanotify_fd, unsigned int __flags,
uint64_t __mask, int __dfd, const char *__pathname)
> When
>
> fanotify_mark(4, FAN_MARK_ADD | FAN_MARK_ONLYDIR,
> FAN_CREATE | FAN_ONDIR, AT_FDCWD, 0xdeadc0de)
The last argument is supposed to be a pointer to a string. I'm guessing
there's no string at 0xdeadc0de.
