prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000180))
r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000040)='/proc/tty/drivers\x00', 0x0, 0x0)
r1 = dup(r0)
read$rfkill(r1, 0x0, 0x0)