linux/scripts/package/buildtar
Michal Marek 91d161857c scripts/package: tar-pkg: use tar --owner=root
Use the --owner= and --group= options to make sure the entries in
the built tar file are owned by root.  Without this change, a
careless sysadmin using the tar-pkg target can easily end up
installing a kernel that is writable by the unprivileged user
account used to build the kernel.

Test that these options are understood before using them so that
non-GNU versions of tar can still be used if the operator is
appropriately cautious.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12 13:08:15 +01:00

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#!/bin/sh
#
# buildtar 0.0.4
#
# (C) 2004-2006 by Jan-Benedict Glaw <jbglaw@lug-owl.de>
#
# This script is used to compile a tarball from the currently
# prepared kernel. Based upon the builddeb script from
# Wichert Akkerman <wichert@wiggy.net>.
#
set -e
#
# Some variables and settings used throughout the script
#
tmpdir="${objtree}/tar-install"
tarball="${objtree}/linux-${KERNELRELEASE}.tar"
#
# Figure out how to compress, if requested at all
#
case "${1}" in
tar-pkg)
compress="cat"
file_ext=""
;;
targz-pkg)
compress="gzip -c9"
file_ext=".gz"
;;
tarbz2-pkg)
compress="bzip2 -c9"
file_ext=".bz2"
;;
*)
echo "Unknown tarball target \"${1}\" requested, please add it to ${0}." >&2
exit 1
;;
esac
#
# Clean-up and re-create the temporary directory
#
rm -rf -- "${tmpdir}"
mkdir -p -- "${tmpdir}/boot"
#
# Try to install modules
#
if grep -q '^CONFIG_MODULES=y' "${objtree}/.config"; then
make ARCH="${ARCH}" O="${objtree}" KBUILD_SRC= INSTALL_MOD_PATH="${tmpdir}" modules_install
fi
#
# Install basic kernel files
#
cp -v -- "${objtree}/System.map" "${tmpdir}/boot/System.map-${KERNELRELEASE}"
cp -v -- "${objtree}/.config" "${tmpdir}/boot/config-${KERNELRELEASE}"
cp -v -- "${objtree}/vmlinux" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}"
#
# Install arch-specific kernel image(s)
#
case "${ARCH}" in
x86|i386|x86_64)
[ -f "${objtree}/arch/x86/boot/bzImage" ] && cp -v -- "${objtree}/arch/x86/boot/bzImage" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}"
;;
alpha)
[ -f "${objtree}/arch/alpha/boot/vmlinux.gz" ] && cp -v -- "${objtree}/arch/alpha/boot/vmlinux.gz" "${tmpdir}/boot/vmlinuz-${KERNELRELEASE}"
;;
parisc*)
[ -f "${KBUILD_IMAGE}" ] && cp -v -- "${KBUILD_IMAGE}" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}"
[ -f "${objtree}/lifimage" ] && cp -v -- "${objtree}/lifimage" "${tmpdir}/boot/lifimage-${KERNELRELEASE}"
;;
vax)
[ -f "${objtree}/vmlinux.SYS" ] && cp -v -- "${objtree}/vmlinux.SYS" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}.SYS"
[ -f "${objtree}/vmlinux.dsk" ] && cp -v -- "${objtree}/vmlinux.dsk" "${tmpdir}/boot/vmlinux-${KERNELRELEASE}.dsk"
;;
*)
[ -f "${KBUILD_IMAGE}" ] && cp -v -- "${KBUILD_IMAGE}" "${tmpdir}/boot/vmlinux-kbuild-${KERNELRELEASE}"
echo "" >&2
echo '** ** ** WARNING ** ** **' >&2
echo "" >&2
echo "Your architecture did not define any architecture-dependant files" >&2
echo "to be placed into the tarball. Please add those to ${0} ..." >&2
echo "" >&2
sleep 5
;;
esac
#
# Create the tarball
#
(
cd "${tmpdir}"
opts=
if tar --owner=root --group=root --help >/dev/null 2>&1; then
opts="--owner=root --group=root"
fi
tar cf - . $opts | ${compress} > "${tarball}${file_ext}"
)
echo "Tarball successfully created in ${tarball}${file_ext}"
exit 0