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Accepting request 898435 from Base:System

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OBS-URL: https://build.opensuse.org/request/show/898435
OBS-URL: https://build.opensuse.org/package/show/openSUSE:Factory/compat-usrmerge?expand=0&rev=2
This commit is contained in:
Dominique Leuenberger 2021-06-10 22:17:41 +00:00 committed by Git OBS Bridge
commit a8180cfcec
3 changed files with 99 additions and 20 deletions
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27
compat-usrmerge.changes
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@ -1,3 +1,30 @@
-------------------------------------------------------------------
Tue Jun 8 12:03:52 UTC 2021 - Ludwig Nussel <lnussel@suse.de>
- early exit in case of overlayfs (boo#1187027)
-------------------------------------------------------------------
Tue Jun 8 07:37:33 UTC 2021 - Fabian Vogt <fvogt@suse.com>
- Avoid dependency on mountpoint from util-linux
- Also check for availability of find
-------------------------------------------------------------------
Mon Jun 7 09:02:56 UTC 2021 - Ludwig Nussel <lnussel@suse.com>
- fix conversion with split /usr (boo#1186781)
-------------------------------------------------------------------
Wed Jun 2 15:29:15 UTC 2021 - Ludwig Nussel <lnussel@suse.com>
- exit early if one of the affected directories has mountpoint
beneath it
-------------------------------------------------------------------
Tue Jun 1 23:27:08 UTC 2021 - Niklas Haas <obs@haasn.xyz>
- add fallback for filesystems without renameat2 (boo#1186637)
------------------------------------------------------------------- -------------------------------------------------------------------
Thu Mar 25 09:50:48 UTC 2021 - Ludwig Nussel <lnussel@suse.de> Thu Mar 25 09:50:48 UTC 2021 - Ludwig Nussel <lnussel@suse.de>

59
convertfs
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@ -3,28 +3,59 @@
ROOT= ROOT=
is_usrmerged() {
local r=1
for dir in bin sbin lib lib64; do
[ -d "$ROOT/$dir" ] || continue
[ -L "$ROOT/$dir" ] || return 1
r=0
done
return "$r"
}
# check if there's anything to do
is_usrmerged && exit 0
# the package is installed with AutoReq off, so no guarantee that # the package is installed with AutoReq off, so no guarantee that
# coreutils actually works # coreutils actually works
if ! (cp --help && mountpoint --help && mountpoint --help) > /dev/null; then if ! { cp --help && find --help; } > /dev/null; then
echo "tools not functional, exit" echo "tools not functional, exit"
exit 1 exit 1
fi fi
# clean up after ourselves no matter how we die. # clean up after ourselves no matter how we die.
cleanup() { cleanup() {
echo "Something failed, cleaning up" echo "UsrMerge conversion failed, cleaning up"
for dir in bin sbin lib lib64; do for dir in bin sbin lib lib64; do
rm -rf -- "$ROOT/usr/${dir}.usrmerge" rm -rf -- "$ROOT/usr/${dir}.usrmerge"
done done
echo "!!! ATTENTION: Do NOT proceed if you see this message during"
echo "!!! distribution upgrade. Chances are high that your system might"
echo "!!! break beyond repair if you do."
} }
trap 'ret=$?; [[ $ret -ne 0 ]] && cleanup;exit $ret;' EXIT trap 'ret=$?; [[ $ret -ne 0 ]] && cleanup;exit $ret;' EXIT
trap 'exit 1;' SIGINT trap 'exit 1;' SIGINT
mountpoint -q "$ROOT/usr" || CP_HARDLINK="-l"
set -e set -e
if [ "$(stat -f -c %T "${ROOT:-/}")" = "overlayfs" ]; then
echo "UsrMerge conversion does not work on overlayfs"
exit 1
fi
CP_HARDLINK="-l"
while read dev mp other; do
[ "$mp" = "$ROOT/usr" ] && CP_HARDLINK=""
for dir in bin sbin lib lib64; do
[ -d "$ROOT/$dir" ] || continue
if [ "${mp#$ROOT/$dir}" != "$mp" ] || [ "${mp#$ROOT/usr/$dir}" != "$mp" ]; then
echo "Please unmount $mp before the conversion"
exit 1
fi
done
done < /proc/mounts
# merge / and /usr in new dir in /usr # merge / and /usr in new dir in /usr
for dir in bin sbin lib lib64; do for dir in bin sbin lib lib64; do
rm -rf -- "$ROOT/usr/${dir}.usrmerge" rm -rf -- "$ROOT/usr/${dir}.usrmerge"
@ -32,7 +63,7 @@ for dir in bin sbin lib lib64; do
[[ -d "$ROOT/$dir" ]] || continue [[ -d "$ROOT/$dir" ]] || continue
echo "Make a copy of \`$ROOT/$dir'." echo "Make a copy of \`$ROOT/$dir'."
[[ -d "$ROOT/$dir" ]] \ [[ -d "$ROOT/$dir" ]] \
&& cp -ax -l "$ROOT/$dir" "$ROOT/usr/${dir}.usrmerge" && cp -ax $CP_HARDLINK "$ROOT/$dir" "$ROOT/usr/${dir}.usrmerge"
# cp can't handle copying a dir over non-directories. So move # cp can't handle copying a dir over non-directories. So move
# those away in advance. Happened with /lib/udev existing as # those away in advance. Happened with /lib/udev existing as
# link on older distros # link on older distros
@ -43,7 +74,7 @@ for dir in bin sbin lib lib64; do
rm -rf "$f.usrmerge~" rm -rf "$f.usrmerge~"
mv "$f" "$f.usrmerge~" mv "$f" "$f.usrmerge~"
fi fi
done < <(find "$ROOT/usr/$dir" -type d -printf "%P\n" ) done < <(find "$ROOT/usr/$dir" -xdev -type d -printf "%P\n" )
echo "Merge the copy with \`$ROOT/usr/$dir'." echo "Merge the copy with \`$ROOT/usr/$dir'."
[[ -d "$ROOT/usr/${dir}.usrmerge" ]] \ [[ -d "$ROOT/usr/${dir}.usrmerge" ]] \
|| mkdir -p "$ROOT/usr/${dir}.usrmerge" || mkdir -p "$ROOT/usr/${dir}.usrmerge"
@ -51,14 +82,14 @@ for dir in bin sbin lib lib64; do
echo "Clean up duplicates in \`$ROOT/usr/$dir'." echo "Clean up duplicates in \`$ROOT/usr/$dir'."
# delete all symlinks that have been backed up. /usr versions # delete all symlinks that have been backed up. /usr versions
# override / ones # override / ones
find "$ROOT/usr/${dir}.usrmerge" -type l -name '*.usrmerge~' -delete || : find "$ROOT/usr/${dir}.usrmerge" -xdev -type l -name '*.usrmerge~' -delete || :
# in rare cases the symlinks may point from /usr to /, so remove # in rare cases the symlinks may point from /usr to /, so remove
# the link in that case # the link in that case
while read file; do while read file; do
o=${file%%.usrmerge~} o=${file%%.usrmerge~}
[ -L "$o" ] && mv -f "$file" "$o" [ -L "$o" ] && mv -f "$file" "$o"
done < <(find "$ROOT/usr/${dir}.usrmerge" \ done < <(find "$ROOT/usr/${dir}.usrmerge" \
-name '*.usrmerge~' -type f) -xdev -name '*.usrmerge~' -type f)
done done
# switch over merged dirs in /usr # switch over merged dirs in /usr
for dir in bin sbin lib lib64; do for dir in bin sbin lib lib64; do
@ -72,7 +103,7 @@ done
for dir in bin sbin lib lib64; do for dir in bin sbin lib lib64; do
if [ ! -L "$ROOT/$dir" -a -d "$ROOT/$dir" ]; then if [ ! -L "$ROOT/$dir" -a -d "$ROOT/$dir" ]; then
echo "Create \`$ROOT/$dir' symlink." echo "Create \`$ROOT/$dir' symlink."
rm -rf "$ROOT/${dir}.usrmerge" || : rm --one-file-system -rf "$ROOT/${dir}.usrmerge" || :
ln -s usr/$dir "$ROOT/${dir}.usrmerge" ln -s usr/$dir "$ROOT/${dir}.usrmerge"
/usr/libexec/xmv "$ROOT/$dir" "$ROOT/${dir}.usrmerge" /usr/libexec/xmv "$ROOT/$dir" "$ROOT/${dir}.usrmerge"
fi fi
@ -88,7 +119,7 @@ for dir in bin sbin lib lib64; do
if [ -d "$d" ]; then if [ -d "$d" ]; then
echo "$d ..." echo "$d ..."
mv "$d" "$d~" mv "$d" "$d~"
rm -rf "$d~" rm --one-file-system -rf "$d~"
fi fi
done done
done done
@ -105,10 +136,4 @@ done
set +e set +e
echo "Run ldconfig." echo "Run ldconfig."
ldconfig -r "$ROOT" ldconfig -r "$ROOT" || :
#. $ROOT/etc/selinux/config
#if [ -n "$(command -v setfiles)" ] && [ "$SELINUX" != "disabled" ] && [ -f /etc/selinux/${SELINUXTYPE}/contexts/files/file_contexts ]; then
# echo "Fixing SELinux labels"
# setfiles -r $ROOT -p /etc/selinux/${SELINUXTYPE}/contexts/files/file_contexts $ROOT/sbin $ROOT/bin $ROOT/lib $ROOT/lib64 $ROOT/usr/lib $ROOT/usr/lib64 $ROOT/etc/ld.so.cache $ROOT/var/cache/ldconfig || :
#fi

33
xmv.c
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@ -31,6 +31,7 @@
#include <errno.h> #include <errno.h>
#include <getopt.h> #include <getopt.h>
#include <fcntl.h> #include <fcntl.h>
#include <limits.h>
#ifndef RENAME_EXCHANGE #ifndef RENAME_EXCHANGE
# define RENAME_EXCHANGE (1 << 1) # define RENAME_EXCHANGE (1 << 1)
@ -66,10 +67,36 @@ int main(int argc, char** argv)
if (argc-optind < 2) if (argc-optind < 2)
help(argv[0], 1); help(argv[0], 1);
r = syscall (SYS_renameat2, AT_FDCWD, argv[optind], AT_FDCWD, argv[optind+1], RENAME_EXCHANGE); const char *source = argv[optind], *target = argv[optind+1];
r = syscall (SYS_renameat2, AT_FDCWD, source, AT_FDCWD, target, RENAME_EXCHANGE);
if (r < 0) { if (r < 0) {
perror("renameat2"); if (errno != EINVAL) {
return 1; perror("renameat2");
return 1;
}
// Fallback for systems without renameat2 support
puts("!!! WARNING: rename2 RENAME_EXCHANGE not supported !!!");
puts("!!! fallback to unsafe rename !!!");
char tmp[PATH_MAX];
r = snprintf(tmp, sizeof(tmp), "%s.XXXXXX", target);
if (r < 0) {
perror("asprintf");
return 1;
}
// not intended to be use in /tmp so good enough
mktemp(tmp);
r = renameat(AT_FDCWD, target, AT_FDCWD, tmp);
if (!r)
r = renameat(AT_FDCWD, source, AT_FDCWD, target);
if (!r)
r = renameat(AT_FDCWD, tmp, AT_FDCWD, source);
if (r < 0) {
perror("renameat");
return 1;
}
} }
return 0; return 0;