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Sun, 15 Oct 2023 13:19:06 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-devel/message/105514 Add support for tar archives created with --acls and/or --xattrs options, PAX header format. GNU tar and libarchive already supports ACLs and extended attributes. We can now add this support as well to opkg-build script in order to use fsetattr or setcap inside do_install command and end up with a file in an image with the relevant ACLs and xattrs. Signed-off-by: Piotr Łobacz --- ...kg-build-Add-acls-and-xattrs-support.patch | 174 ++++++++++++++++++ .../opkg-utils/opkg-utils_0.6.2.bb | 1 + 2 files changed, 175 insertions(+) create mode 100644 meta/recipes-devtools/opkg-utils/opkg-utils/0002-opkg-build-Add-acls-and-xattrs-support.patch diff --git a/meta/recipes-devtools/opkg-utils/opkg-utils/0002-opkg-build-Add-acls-and-xattrs-support.patch b/meta/recipes-devtools/opkg-utils/opkg-utils/0002-opkg-build-Add-acls-and-xattrs-support.patch new file mode 100644 index 0000000000..6cc81d3241 --- /dev/null +++ b/meta/recipes-devtools/opkg-utils/opkg-utils/0002-opkg-build-Add-acls-and-xattrs-support.patch @@ -0,0 +1,174 @@ +From 8d9953dd8d589e9b740307976cbe474e0ce292a0 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Piotr=20=C5=81obacz?= +Date: Wed, 16 Aug 2023 14:59:35 +0200 +Subject: [PATCH 1/2] opkg-build: Add acls and xattrs support +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Add support for tar archives created with --acls and/or --xattrs options, +PAX header format. + +GNU tar and libarchive already supports ACLs and extended attributes. +We can now add this support as well to opkg-build script in order to use +fsetattr or setcap inside do_install command and end up with a file in +an image with the relevant ACLs and xattrs. + +Upstream-Status: Backport [8d9953dd8d589e9b740307976cbe474e0ce292a0] + +[1] https://bugzilla.yoctoproject.org/show_bug.cgi?id=15097 +[2] https://groups.google.com/g/opkg-devel/c/aEGL7XRXfaA + +Signed-off-by: Piotr Łobacz +--- + opkg-build | 81 +++++++++++++++++++++++++++++++++++------------------- + 1 file changed, 53 insertions(+), 28 deletions(-) + +diff --git a/opkg-build b/opkg-build +index a9e45d4..fb0873d 100755 +--- a/opkg-build ++++ b/opkg-build +@@ -145,6 +145,7 @@ You probably want to chown these to a system user: " >&2 + ### + # opkg-build "main" + ### ++attributesargs="" + ogargs="" + outer=ar + noclean=0 +@@ -153,22 +154,6 @@ compressor=gzip + zipargs="-9n" + compressorargs="" + +-# Determine if tar supports the --format argument by checking the help output. +-# +-# This is needed because: +-# - Busybox tar doesn't support '--format' +-# - On some Linux distros, tar now defaults to posix format if '--format' +-# isn't explicitly specified +-# - Opkg doesn't currently support posix format archives +-# +-# It's easier to check for mention of the '--format' option than to detect the +-# tar implementation and maintain a list of which support '--format'. +-tarformat="" +-if tar --help 2>&1 | grep -- "--format" > /dev/null; +-then +- tarformat="--format=gnu" +-fi +- + compressor_ext() { + case $1 in + gzip|pigz) +@@ -197,20 +182,24 @@ compressor_ext() { + : <<=cut + =head1 SYNOPSIS + +-B [B<-c>] [B<-C>] [B<-Z> I] [B<-a>] [B<-O>] [B<-o> I] [B<-g> I] I [I] ++B [B<-A>] [B<-X>] [B<-c>] [B<-C>] [B<-Z> I] [B<-a>] [B<-O>] [B<-o> I] [B<-g> I] I [I] + + =cut + +-usage="Usage: $0 [-c] [-C] [-Z compressor] [-a compressor_args] [-O] [-o owner] [-g group] []" +-while getopts "a:cCg:ho:vOZ:" opt; do ++usage="Usage: $0 [-A] [-X] [-c] [-C] [-Z compressor] [-a compressor_args] [-O] [-o owner] [-g group] []" ++while getopts "Aa:cCg:ho:vOXZ:" opt; do + case $opt in ++ A ) attributesargs="${attributesargs:+$attributesargs }--acls" ++ ;; ++ X ) attributesargs="${attributesargs:+$attributesargs }--xattrs" ++ ;; + o ) owner=$OPTARG +- ogargs="--owner=$owner" ++ ogargs="${ogargs:+$ogargs }--owner=$owner" + ;; + O ) opkext=1 + ;; + g ) group=$OPTARG +- ogargs="$ogargs --group=$group" ++ ogargs="${ogargs:+$ogargs }--group=$group" + ;; + c ) outer=tar + ;; +@@ -232,6 +221,32 @@ while getopts "a:cCg:ho:vOZ:" opt; do + esac + done + ++# Determine if tar supports the --format argument by checking the help output. ++# ++# This is needed because: ++# - Busybox tar doesn't support '--format' ++# - On some Linux distros, tar now defaults to posix format if '--format' ++# isn't explicitly specified ++# - Opkg currently supports posix format archives, but gnu format is left ++# here intentionally for backward compatibility ++# ++# It's easier to check for mention of the '--format' option than to detect the ++# tar implementation and maintain a list of which support '--format'. ++tarformat="" ++if tar --help 2>&1 | grep -- "--format" > /dev/null; ++then ++ # For ACLs or xattr support, gnu format will not work ++ # we need to set posix format instead ++ if [ ! -z "$attributesargs" ] ; then ++ tarformat="--format=posix" ++ else ++ tarformat="--format=gnu" ++ fi ++elif [ ! -z "$attributesargs" ] ; then ++ echo "*** Error: Attributes: $attributesargs, don't work, without posix format, which is not supported by host's tar command." >&2 ++ exit 1 ++fi ++ + cext=$(compressor_ext $compressor) + + # pgzip requires -T to avoid timestamps on the gzip archive +@@ -301,21 +316,31 @@ fi + tmp_dir=$dest_dir/IPKG_BUILD.$$ + mkdir $tmp_dir + +-build_date="${SOURCE_DATE_EPOCH:-$(date +%s)}" +- +-mtime_args="" ++mtime_args="--mtime=@${SOURCE_DATE_EPOCH:-$(date +%s)}" + # --clamp-mtime requires tar > 1.28. Only use it if SOURCE_DATE_EPOCH is set, to avoid having a generic case dependency on tar > 1.28. + # this setting will make sure files generated at build time have consistent mtimes, for reproducible builds. + if [ ! -z "$SOURCE_DATE_EPOCH" ]; then +- mtime_args="--mtime=@$build_date --clamp-mtime" ++ mtime_args="$mtime_args --clamp-mtime" ++fi ++ ++# Notice, that if you create an archive in POSIX format (see section GNU tar and POSIX tar) and the environment variable POSIXLY_CORRECT is set, ++# then the two archives created using the same options on the same set of files will not be byte-to-byte equivalent even with the above option. ++# This is because the posix default for extended header names includes the PID of the tar process, which is different at each run. To produce ++# byte-to-byte equivalent archives in this case, either unset POSIXLY_CORRECT, or use the following option: ++# ++# --pax-option=exthdr.name=%d/PaxHeaders/%f,atime:=0,ctime:=0 ++# ++# https://www.gnu.org/software/tar/manual/html_node/PAX-keywords.html ++if [[ "$tarformat" == "--format=posix" ]]; then ++ mtime_args="$mtime_args --pax-option=exthdr.name=%d/PaxHeaders/%f,atime:=0,ctime:=0" + fi + + export LANG=C + export LC_ALL=C + ( cd $pkg_dir/$CONTROL && find . -type f | sort > $tmp_dir/control_list ) + ( cd $pkg_dir && find . -path ./$CONTROL -prune -o -path . -o -print | sort > $tmp_dir/file_list ) +-( cd $pkg_dir && tar $ogargs $tsortargs --no-recursion $mtime_args -c $tarformat -T $tmp_dir/file_list | $compressor $compressorargs > $tmp_dir/data.tar.$cext ) +-( cd $pkg_dir/$CONTROL && tar $ogargs $tsortargs --no-recursion --mtime=@$build_date -c $tarformat -T $tmp_dir/control_list | gzip $zipargs > $tmp_dir/control.tar.gz ) ++( cd $pkg_dir && tar $attributesargs $ogargs $tsortargs --numeric-owner --no-recursion $mtime_args -c $tarformat -T $tmp_dir/file_list | $compressor $compressorargs > $tmp_dir/data.tar.$cext ) ++( cd $pkg_dir/$CONTROL && tar $ogargs $tsortargs --no-recursion $mtime_args -c $tarformat -T $tmp_dir/control_list | gzip $zipargs > $tmp_dir/control.tar.gz ) + rm $tmp_dir/file_list + rm $tmp_dir/control_list + +@@ -331,7 +356,7 @@ rm -f $pkg_file + if [ "$outer" = "ar" ] ; then + ( cd $tmp_dir && ar -crfD $pkg_file ./debian-binary ./control.tar.gz ./data.tar.$cext ) + else +- ( cd $tmp_dir && tar -c $tsortargs --mtime=@$build_date $tarformat ./debian-binary ./control.tar.gz ./data.tar.$cext | gzip $zipargs > $pkg_file ) ++ ( cd $tmp_dir && tar -c $tsortargs $mtime_args $tarformat ./debian-binary ./control.tar.gz ./data.tar.$cext | gzip $zipargs > $pkg_file ) + fi + + rm $tmp_dir/debian-binary $tmp_dir/data.tar.$cext $tmp_dir/control.tar.gz +-- +2.34.1 + diff --git a/meta/recipes-devtools/opkg-utils/opkg-utils_0.6.2.bb b/meta/recipes-devtools/opkg-utils/opkg-utils_0.6.2.bb index eb88b9b734..d5ce2cfbe2 100644 --- a/meta/recipes-devtools/opkg-utils/opkg-utils_0.6.2.bb +++ b/meta/recipes-devtools/opkg-utils/opkg-utils_0.6.2.bb @@ -9,6 +9,7 @@ PROVIDES += "${@bb.utils.contains('PACKAGECONFIG', 'update-alternatives', 'virtu SRC_URI = "git://git.yoctoproject.org/opkg-utils;protocol=https;branch=master \ file://0001-update-alternatives-correctly-match-priority.patch \ + file://0002-opkg-build-Add-acls-and-xattrs-support.patch \ " SRCREV = "67994e62dc598282830385da75ba9b1abbbda941"