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make_chroot: clobber existing /etc/mtab

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If our sdk has an /etc/mtab file already, then clobber it.  This fixes
build problems where chromeos-base now installs /etc/mtab for us, but
the sdk build isn't expecting it leading to the error:

INFO    cros_sdk:make_chroot: Running init_setup()...
ln: creating symbolic link `/b/cbuild/new-sdk-chroot/etc/mtab': File exists
Running ['/b/cbuild/src/scripts/sdk_lib/make_chroot.sh', '--stage3_path',
	'/b/cbuild/built-sdk.tar.xz', '--chroot', '/b/cbuild/new-sdk-chroot',
	'--cache_dir', '/b/cbuild/.cache', '--nousepkg'] failed!

BUG=None
TEST=`cros_sdk --chroot foo` still works

Change-Id: I539cf329e93e28534e6ff00577ce415d76918b85
Reviewed-on: https://gerrit.chromium.org/gerrit/43641
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
This commit is contained in:
Mike Frysinger 2013-02-20 17:29:05 -05:00 committed by Michael Marineau
parent e03e9dbfdc
commit 99d8dde1d6
1 changed files with 1 additions and 1 deletions
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2
sdk_lib/make_chroot.sh
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@ -176,7 +176,7 @@ init_setup () {
"${FLAGS_chroot}"/"${PORTAGE_STABLE_OVERLAY}"
# Some operations need an mtab.
ln -s /proc/mounts "${FLAGS_chroot}/etc/mtab"
ln -sfT /proc/mounts "${FLAGS_chroot}/etc/mtab"
# Set up sudoers. Inside the chroot, the user can sudo without a password.
# (Safe enough, since the only way into the chroot is to 'sudo chroot', so