r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000001600)='/proc/key-users\x00', 0x0, 0x0)
r1 = openat$ttyS3(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
dup3(r0, r1, 0x0)
openat$ttyS3(0xffffffffffffff9c, 0x0, 0x0, 0x0)