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Chen Qi 7a2de0091d runqemu-extract-sdk: add --numeric-owner option to tar command

If the same username exists on both target and the build host, but
the uids differ, and we start target via NFS, then the uid for the
user will be incorrect on target.

For example, if postfix's uid on host is 119 and on target is 1024,
then if we start target via NFS, the uid for postfix will be 119.

The root cause is that when we use runqemu-extract-sdk to generate
the NFS rootfs for later use, the tar command will respect the username
instead of uid. So if PSEUDO_PASSWD environment is not set correctly,
the host /etc/passwd will be used, resulting in wrong uids.

The situation for gid is completely analogous to that of uid.

It's almost impossible for the runqemu-extract-sdk to guess the correct
location of the needed password file merely based on the target tarball
name.

This patch solves this problem by adding the '--numeric-owner' option
to the tar command so that the uid/gid will be used when extracting the
tarball using runqemu-extract-sdk. In this situation, we'll always get
the correct uid/gid after extracting the tarball.

[YOCTO #5364]

(From OE-Core rev: acce6ff1a77cfd29e3868faa89b120becb58bbbf)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2013-10-26 15:59:17 +01:00

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#!/bin/bash

This utility extracts an SDK image tarball using pseudo, and stores

the pseudo database in var/pseudo within the rootfs. If you want to

boot QEMU using an nfsroot, you must use this script to create the

rootfs to ensure it is done correctly with pseudo.

Copyright (c) 2010 Intel Corp.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License version 2 as

published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

function usage() { echo "Usage: $0 " }

if [ $# -ne 2 ]; then usage exit 1 fi

SYSROOT_SETUP_SCRIPT=which oe-find-native-sysroot 2> /dev/null if [ -z "$SYSROOT_SETUP_SCRIPT" ]; then echo "Error: Unable to find the oe-find-native-sysroot script" echo "Did you forget to source your build system environment setup script?" exit 1 fi . $SYSROOT_SETUP_SCRIPT PSEUDO_OPTS="-P $OECORE_NATIVE_SYSROOT/usr"

ROOTFS_TARBALL=$1 SDK_ROOTFS_DIR=$2

if [ ! -e "$ROOTFS_TARBALL" ]; then echo "Error: sdk tarball '$ROOTFS_TARBALL' does not exist" usage exit 1 fi

Convert SDK_ROOTFS_DIR to a full pathname

if ; then SDK_ROOTFS_DIR=$(pwd)/$SDK_ROOTFS_DIR fi

TAR_OPTS="" if [[ "ROOTFS_TARBALL" =~ tar\.bz2 ]]; then TAR_OPTS="--numeric-owner -xjf" fi if [[ "ROOTFS_TARBALL" =~ tar\.gz ]]; then TAR_OPTS="--numeric-owner -xzf" fi if [[ "ROOTFS_TARBALL" =~ \.tar ]]; then TAR_OPTS="--numeric-owner -xf" fi if [ -z "$TAR_OPTS" ]; then echo "Error: Unable to determine sdk tarball format" echo "Accepted types: .tar / .tar.gz / .tar.bz2" exit 1 fi

if [ ! -d "$SDK_ROOTFS_DIR" ]; then echo "Creating directory $SDK_ROOTFS_DIR" mkdir -p "$SDK_ROOTFS_DIR" fi

pseudo_state_dir="$SDK_ROOTFS_DIR/../$(basename "$SDK_ROOTFS_DIR").pseudo_state"

if [ -e "$pseudo_state_dir" ]; then echo "Error: $pseudo_state_dir already exists!" echo "Please delete the rootfs tree and pseudo directory manually" echo "if this is really what you want." exit 1 fi

mkdir -p "$pseudo_state_dir" touch "$pseudo_state_dir/pseudo.pid" PSEUDO_LOCALSTATEDIR="$pseudo_state_dir" export PSEUDO_LOCALSTATEDIR

echo "Extracting rootfs tarball using pseudo..." echo "$PSEUDO $PSEUDO_OPTS tar -C "$SDK_ROOTFS_DIR" $TAR_OPTS "$ROOTFS_TARBALL"" $PSEUDO $PSEUDO_OPTS tar -C "$SDK_ROOTFS_DIR" $TAR_OPTS "$ROOTFS_TARBALL"

DIRCHECK=ls -l "$SDK_ROOTFS_DIR" | wc -l if [ "$DIRCHECK" -lt 5 ]; then echo "Warning: I don't see many files in $SDK_ROOTFS_DIR" echo "Please double-check the extraction worked as intended" exit 0 fi

echo "SDK image successfully extracted to $SDK_ROOTFS_DIR"

exit 0

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