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mkarchroot: use bind mount instead of symlink for /dev/ptmx 

We need /dev/ptmx -> /dev/pts/ptmx (for devpts -o newinstance)
Other way to do this thing is via bind mount (as said kernel doc[devpts.txt]).

This should be done in this way at least for /dev as devtmpfs in the chroot.
Since we can not touch /dev (devtmpfs), because devtmpfs is "singleton",
just use bind method and avoid interference.

Do it the same for both modes of /dev (tmpfs) and (devtmpfs) to keep it simple.

Currently devpts in chroot is not working without this when using /dev as devtmpfs,
this fixes this issue (opening /dev/ptmx, creates devices nodes on outside /dev/pts)

Signed-off-by: Gerardo Exequiel Pozzi <vmlinuz386@yahoo.com.ar>
Signed-off-by: Pierre Schmitz <pierre@archlinux.de>
This commit is contained in:
Gerardo Exequiel Pozzi 2012-03-09 00:04:28 -03:00 committed by Pierre Schmitz
parent fda394f1a0
commit 231496c82a
1 changed files with 3 additions and 1 deletions
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4
mkarchroot.in
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@ -103,6 +103,7 @@ chroot_mount() {
mknod -m 644 "${working_dir}/dev/random" c 1 8
mknod -m 644 "${working_dir}/dev/urandom" c 1 9
mknod -m 666 "${working_dir}/dev/tty" c 5 0
mknod -m 666 "${working_dir}/dev/ptmx" c 5 2
mknod -m 666 "${working_dir}/dev/tty0" c 4 0
mknod -m 666 "${working_dir}/dev/full" c 1 7
ln -s /proc/kcore "${working_dir}/dev/core"
@ -117,7 +118,7 @@ chroot_mount() {
[[ -e "${working_dir}/dev/pts" ]] || mkdir "${working_dir}/dev/pts"
mount -t devpts devpts "${working_dir}/dev/pts" -o newinstance,ptmxmode=666
ln -s pts/ptmx "${working_dir}/dev/ptmx"
mount -o bind "${working_dir}/dev/pts/ptmx" "${working_dir}/dev/ptmx"
[[ -e $cache_dir ]] || mkdir -p "${cache_dir}"
[[ -e "${working_dir}/${cache_dir}" ]] || mkdir -p "${working_dir}/${cache_dir}"
@ -148,6 +149,7 @@ copy_hostconf () {
chroot_umount () {
umount "${working_dir}/proc"
umount "${working_dir}/sys"
umount "${working_dir}/dev/ptmx"
umount "${working_dir}/dev/pts"
umount "${working_dir}/dev/shm"
umount "${working_dir}/dev"