> It seems this is not a problem on all arm64 boxes. On IRC suihkulokki
> found that it worked on his self compiled 4.2 kernel. Some poking about
> with strace revealed that in the cases where dtach worked (whether
> arm64, or my amd64 box), statfs("/dev/pts") returns DEVPTS_SUPER_MAGIC,
> while in the case where it fails it returns TMPFS_MAGIC. Not that I know
> what this signifies.
It sounds like /dev/pts is not mounted when it fails. You could try
mounting it with:
mount devpts /dev/pts -t devpts
(If the problem is this simple, then perhaps dtach should be modified
to display a more helpful error message. I've noticed this with /proc:
some programs that require /proc explain that /proc is not mounted and
how to mount it; others crash obscurely.)
