Mount /run and /run/shm in chroots.

build/install-chroot.sh

 #!/bin/bash -e
 
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This script installs Debian-derived distributions in a chroot environment.
 # It can for example be used to have an accurate 32bit build and test
 # environment when otherwise working on a 64bit machine.
 # N. B. it is unlikely that this script will ever work on anything other than a
@@ skipping 374 matching lines @@
 
 # If this system has a "/media" mountpoint, import it into the chroot
 # environment. Most modern distributions use this mount point to
 # automatically mount devices such as CDROMs, USB sticks, etc...
 if [ -d /media ] &&
    ! grep -qs '^/media' /etc/schroot/mount-"${target}"; then
   echo '/media /media none rw,rbind 0 0' |
     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 fi
 
-# Share /dev/shm and possibly /run/shm
+# Share /dev/shm, /run and /run/shm.
 grep -qs '^/dev/shm' /etc/schroot/mount-"${target}" ||
   echo '/dev/shm /dev/shm none rw,bind 0 0' |
     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
-if [ -d "/var/lib/chroot/${target}/run" ] &&
-   ! grep -qs '^/run/shm' /etc/schroot/mount-"${target}"; then
+if [ ! -d "/var/lib/chroot/${target}/run" ] &&
+   ! grep -qs '^/run' /etc/schroot/mount-"${target}"; then
+  echo '/run /run none rw,bind 0 0' |
+    sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
+fi
+if ! grep -qs '^/run/shm' /etc/schroot/mount-"${target}"; then
   { [ -d /run ] && echo '/run/shm /run/shm none rw,bind 0 0' ||
                    echo '/dev/shm /run/shm none rw,bind 0 0'; } |
     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 fi
 
 # Set up a special directory that changes contents depending on the target
 # that is executing.
 d="$(readlink -f "${HOME}/chroot" 2>/dev/null || echo "${HOME}/chroot")"
 s="${d}/.${target}"
 echo "${s} ${d} none rw,bind 0 0" |
@@ skipping 389 matching lines @@
 
 For Chrome, this probably means you want to make your "out" directory a
 symbolic link that points somewhere inside of "${HOME}/chroot".
 
 You still need to run "gclient runhooks" whenever you switch from building
 outside of the chroot to inside of the chroot. But you will find that you
 don't have to repeatedly erase and then completely rebuild all your object
 and binary files.
 
 EOF