linux-yocto/scripts/package/builddeb

#!/bin/sh

builddeb 1.3

Copyright 2003 Wichert Akkerman wichert@wiggy.net

Simple script to generate a deb package for a Linux kernel. All the

complexity of what to do with a kernel after it is installed or removed

is left to other scripts and packages: they can install scripts in the

/etc/kernel/{pre,post}{inst,rm}.d/ directories (or an alternative location

specified in KDEB_HOOKDIR) that will be called on package install and

removal.

set -e

create_package() { local pname="$1" pdir="$2"

mkdir -m 755 -p "$pdir/DEBIAN"
mkdir -p "$pdir/usr/share/doc/$pname"
cp debian/copyright "$pdir/usr/share/doc/$pname/"
cp debian/changelog "$pdir/usr/share/doc/$pname/changelog.Debian"
gzip -9 "$pdir/usr/share/doc/$pname/changelog.Debian"
sh -c "cd '$pdir'; find . -type f ! -path './DEBIAN/*' -printf '%P\0' \
	| xargs -r0 md5sum > DEBIAN/md5sums"

# Fix ownership and permissions
chown -R root:root "$pdir"
chmod -R go-w "$pdir"
# in case we are in a restrictive umask environment like 0077
chmod -R a+rX "$pdir"

# Create the package
dpkg-gencontrol $forcearch -Vkernel:debarch="${debarch}" -p$pname -P"$pdir"
dpkg --build "$pdir" ..

}

set_debarch() { # Attempt to find the correct Debian architecture case "$UTS_MACHINE" in i386|ia64|alpha) debarch="$UTS_MACHINE" ;; x86_64) debarch=amd64 ;; sparc*) debarch=sparc ;; s390*) debarch=s390$(grep -q CONFIG_64BIT=y $KCONFIG_CONFIG && echo x || true) ;; ppc*) debarch=$(grep -q CPU_LITTLE_ENDIAN=y $KCONFIG_CONFIG && echo ppc64el || echo powerpc) ;; parisc*) debarch=hppa ;; mips*) debarch=mips$(grep -q CPU_LITTLE_ENDIAN=y $KCONFIG_CONFIG && echo el || true) ;; aarch64|arm64) debarch=arm64 ;; arm*) if grep -q CONFIG_AEABI=y $KCONFIG_CONFIG; then if grep -q CONFIG_VFP=y $KCONFIG_CONFIG; then debarch=armhf else debarch=armel fi else debarch=arm fi ;; ) debarch=$(dpkg --print-architecture) echo "" >&2 echo "* ** ** WARNING ** ** **" >&2 echo "" >&2 echo "Your architecture doesn't have its equivalent" >&2 echo "Debian userspace architecture defined!" >&2 echo "Falling back to using your current userspace instead!" >&2 echo "Please add support for $UTS_MACHINE to ${0} ..." >&2 echo "" >&2 esac if [ -n "$KBUILD_DEBARCH" ] ; then debarch="$KBUILD_DEBARCH" fi forcearch="-DArchitecture=$debarch"

}

Some variables and settings used throughout the script

version=$KERNELRELEASE revision=$(cat .version) if [ -n "$KDEB_PKGVERSION" ]; then packageversion=$KDEB_PKGVERSION else packageversion=$version-$revision fi sourcename=$KDEB_SOURCENAME tmpdir="$objtree/debian/tmp" kernel_headers_dir="$objtree/debian/hdrtmp" libc_headers_dir="$objtree/debian/headertmp" dbg_dir="$objtree/debian/dbgtmp" packagename=linux-image-$version kernel_headers_packagename=linux-headers-$version libc_headers_packagename=linux-libc-dev dbg_packagename=$packagename-dbg debarch= forcearch= set_debarch

if [ "$ARCH" = "um" ] ; then packagename=user-mode-linux-$version fi

Not all arches have the same installed path in debian

XXX: have each arch Makefile export a variable of the canonical image install

path instead

case $ARCH in um) installed_image_path="usr/bin/linux-$version" ;; parisc|mips|powerpc) installed_image_path="boot/vmlinux-$version" ;; *) installed_image_path="boot/vmlinuz-$version" esac

BUILD_DEBUG="$(grep -s '^CONFIG_DEBUG_INFO=y' $KCONFIG_CONFIG || true)"

Setup the directory structure

rm -rf "$tmpdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir" $objtree/debian/files mkdir -m 755 -p "$tmpdir/DEBIAN" mkdir -p "$tmpdir/lib" "$tmpdir/boot" mkdir -p "$kernel_headers_dir/lib/modules/$version/"

Build and install the kernel

if [ "$ARCH" = "um" ] ; then mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin" "$tmpdir/usr/share/doc/$packagename" $MAKE linux cp System.map "$tmpdir/usr/lib/uml/modules/$version/System.map" cp $KCONFIG_CONFIG "$tmpdir/usr/share/doc/$packagename/config" gzip "$tmpdir/usr/share/doc/$packagename/config" else cp System.map "$tmpdir/boot/System.map-$version" cp $KCONFIG_CONFIG "$tmpdir/boot/config-$version" fi cp "$($MAKE -s image_name)" "$tmpdir/$installed_image_path"

if grep -q "^CONFIG_OF=y" $KCONFIG_CONFIG ; then # Only some architectures with OF support have this target if grep -q dtbs_install "${srctree}/arch/$SRCARCH/Makefile"; then $MAKE KBUILD_SRC= INSTALL_DTBS_PATH="$tmpdir/usr/lib/$packagename" dtbs_install fi fi

if grep -q '^CONFIG_MODULES=y' $KCONFIG_CONFIG ; then INSTALL_MOD_PATH="$tmpdir" $MAKE KBUILD_SRC= modules_install rm -f "$tmpdir/lib/modules/$version/build" rm -f "$tmpdir/lib/modules/$version/source" if [ "$ARCH" = "um" ] ; then mv "$tmpdir/lib/modules/$version"/* "$tmpdir/usr/lib/uml/modules/$version/" rmdir "$tmpdir/lib/modules/$version" fi if [ -n "$BUILD_DEBUG" ] ; then for module in $(find $tmpdir/lib/modules/ -name *.ko -printf '%P\n'); do module=lib/modules/$module mkdir -p $(dirname $dbg_dir/usr/lib/debug/$module) # only keep debug symbols in the debug file $OBJCOPY --only-keep-debug $tmpdir/$module $dbg_dir/usr/lib/debug/$module # strip original module from debug symbols $OBJCOPY --strip-debug $tmpdir/$module # then add a link to those $OBJCOPY --add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $tmpdir/$module done

	# resign stripped modules
	MODULE_SIG_ALL="$(grep -s '^CONFIG_MODULE_SIG_ALL=y' $KCONFIG_CONFIG || true)"
	if [ -n "$MODULE_SIG_ALL" ]; then
		INSTALL_MOD_PATH="$tmpdir" $MAKE KBUILD_SRC= modules_sign
	fi
fi

fi

if [ "$ARCH" != "um" ]; then $MAKE headers_check KBUILD_SRC= $MAKE headers_install KBUILD_SRC= INSTALL_HDR_PATH="$libc_headers_dir/usr" fi

Install the maintainer scripts

Note: hook scripts under /etc/kernel are also executed by official Debian

kernel packages, as well as kernel packages built using make-kpkg.

make-kpkg sets $INITRD to indicate whether an initramfs is wanted, and

so do we; recent versions of dracut and initramfs-tools will obey this.

debhookdir=${KDEB_HOOKDIR:-/etc/kernel} if grep -q '^CONFIG_BLK_DEV_INITRD=y' $KCONFIG_CONFIG; then want_initrd=Yes else want_initrd=No fi for script in postinst postrm preinst prerm ; do mkdir -p "$tmpdir$debhookdir/$script.d" cat < "$tmpdir/DEBIAN/$script" #!/bin/sh

set -e

Pass maintainer script parameters to hook scripts

export DEB_MAINT_PARAMS="$*"

Tell initramfs builder whether it's wanted

export INITRD=$want_initrd

test -d $debhookdir/$script.d && run-parts --arg="$version" --arg="/$installed_image_path" $debhookdir/$script.d exit 0 EOF chmod 755 "$tmpdir/DEBIAN/$script" done

Try to determine maintainer and email values

if [ -n "$DEBEMAIL" ]; then email=$DEBEMAIL elif [ -n "$EMAIL" ]; then email=$EMAIL else email=$(id -nu)@$(hostname -f 2>/dev/null || hostname) fi if [ -n "$DEBFULLNAME" ]; then name=$DEBFULLNAME elif [ -n "$NAME" ]; then name=$NAME else name="Anonymous" fi maintainer="$name <$email>"

Try to determine distribution

if [ -n "$KDEB_CHANGELOG_DIST" ]; then distribution=$KDEB_CHANGELOG_DIST

In some cases lsb_release returns the codename as n/a, which breaks dpkg-parsechangelog

elif distribution=$(lsb_release -cs 2>/dev/null) && [ -n "$distribution" ] && [ "$distribution" != "n/a" ]; then : # nothing to do in this case else distribution="unstable" echo >&2 "Using default distribution of 'unstable' in the changelog" echo >&2 "Install lsb-release or set $KDEB_CHANGELOG_DIST explicitly" fi

Generate a simple changelog template

cat < debian/changelog $sourcename ($packageversion) $distribution; urgency=low

• Custom built Linux kernel.

-- $maintainer $(date -R) EOF

Generate copyright file

cat < debian/copyright This is a packacked upstream version of the Linux kernel.

The sources may be found at most Linux archive sites, including: https://www.kernel.org/pub/linux/kernel

Copyright: 1991 - 2017 Linus Torvalds and others.

The git repository for mainline kernel development is at: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.

On Debian GNU/Linux systems, the complete text of the GNU General Public License version 2 can be found in `/usr/share/common-licenses/GPL-2'. EOF

build_depends="bc, kmod, cpio "

Generate a control file

cat < debian/control Source: $sourcename Section: kernel Priority: optional Maintainer: $maintainer Build-Depends: $build_depends Homepage: http://www.kernel.org/ EOF

if [ "$ARCH" = "um" ]; then cat <> debian/control

Package: $packagename Architecture: any Description: User Mode Linux kernel, version $version User-mode Linux is a port of the Linux kernel to its own system call interface. It provides a kind of virtual machine, which runs Linux as a user process under another Linux kernel. This is useful for kernel development, sandboxes, jails, experimentation, and many other things. . This package contains the Linux kernel, modules and corresponding other files, version: $version. EOF

else cat <> debian/control

Package: $packagename Architecture: any Description: Linux kernel, version $version This package contains the Linux kernel, modules and corresponding other files, version: $version. EOF

fi

Build kernel header package

(cd $srctree; find . -name Makefile* -o -name Kconfig* -o -name *.pl) > "$objtree/debian/hdrsrcfiles" (cd $srctree; find arch/*/include include scripts -type f) >> "$objtree/debian/hdrsrcfiles" (cd $srctree; find arch/$SRCARCH -name module.lds -o -name Kbuild.platforms -o -name Platform) >> "$objtree/debian/hdrsrcfiles" (cd $srctree; find $(find arch/$SRCARCH -name include -o -name scripts -type d) -type f) >> "$objtree/debian/hdrsrcfiles" if grep -q '^CONFIG_STACK_VALIDATION=y' $KCONFIG_CONFIG ; then (cd $objtree; find tools/objtool -type f -executable) >> "$objtree/debian/hdrobjfiles" fi (cd $objtree; find arch/$SRCARCH/include Module.symvers include scripts -type f) >> "$objtree/debian/hdrobjfiles" if grep -q '^CONFIG_GCC_PLUGINS=y' $KCONFIG_CONFIG ; then (cd $objtree; find scripts/gcc-plugins -name *.so -o -name gcc-common.h) >> "$objtree/debian/hdrobjfiles" fi destdir=$kernel_headers_dir/usr/src/linux-headers-$version mkdir -p "$destdir" (cd $srctree; tar -c -f - -T -) < "$objtree/debian/hdrsrcfiles" | (cd $destdir; tar -xf -) (cd $objtree; tar -c -f - -T -) < "$objtree/debian/hdrobjfiles" | (cd $destdir; tar -xf -) (cd $objtree; cp $KCONFIG_CONFIG $destdir/.config) # copy .config manually to be where it's expected to be ln -sf "/usr/src/linux-headers-$version" "$kernel_headers_dir/lib/modules/$version/build" rm -f "$objtree/debian/hdrsrcfiles" "$objtree/debian/hdrobjfiles"

cat <> debian/control

Package: $kernel_headers_packagename Architecture: any Description: Linux kernel headers for $KERNELRELEASE on ${kernel:debarch} This package provides kernel header files for $KERNELRELEASE on ${kernel:debarch} . This is useful for people who need to build external modules EOF

cat <> debian/control

Package: $libc_headers_packagename Section: devel Provides: linux-kernel-headers Architecture: any Description: Linux support headers for userspace development This package provides userspaces headers from the Linux kernel. These headers are used by the installed headers for GNU glibc and other system libraries. EOF

if [ "$ARCH" != "um" ]; then create_package "$kernel_headers_packagename" "$kernel_headers_dir" create_package "$libc_headers_packagename" "$libc_headers_dir" fi

create_package "$packagename" "$tmpdir"

if [ -n "$BUILD_DEBUG" ] ; then # Build debug package # Different tools want the image in different locations # perf mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/ cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/ # systemtap mkdir -p $dbg_dir/usr/lib/debug/boot/ ln -s ../lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/boot/vmlinux-$version # kdump-tools ln -s lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/vmlinux-$version

cat <<EOF >> debian/control

Package: $dbg_packagename Section: debug Architecture: any Description: Linux kernel debugging symbols for $version This package will come in handy if you need to debug the kernel. It provides all the necessary debug symbols for the kernel and its modules. EOF

create_package "$dbg_packagename" "$dbg_dir"

fi

if [ "x$1" = "xdeb-pkg" ] then cat < debian/rules #!/usr/bin/make -f

build: $(MAKE)

binary-arch: $(MAKE) KDEB_SOURCENAME=${sourcename} KDEB_PKGVERSION=${packageversion} bindeb-pkg

clean: rm -rf debian/*tmp debian/files mv debian/ debian.backup # debian/ might be cleaned away $(MAKE) clean mv debian.backup debian

binary: binary-arch EOF mv ${sourcename}.tar.gz ../${sourcename}${version}.orig.tar.gz tar caf ../${sourcename}${packageversion}.debian.tar.gz debian/{copyright,rules,changelog,control} dpkg-source -cdebian/control -ldebian/changelog --format="3.0 (custom)" --target-format="3.0 (quilt)"
-b / ../${sourcename}${version}.orig.tar.gz ../${sourcename}${packageversion}.debian.tar.gz mv ${sourcename}${packageversion}*dsc .. dpkg-genchanges > ../${sourcename}${packageversion}${debarch}.changes else dpkg-genchanges -b > ../${sourcename}${packageversion}_${debarch}.changes fi

exit 0