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testsuite: run protected-regular test as non-root using unshare

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Use unshare with user namespace UID mapping to run the
protected-regular test without real root privileges. Falls back
to skipping if unshare or uidmap is not available.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Andrew Tridgell
2026-04-22 12:36:50 +10:00
parent 79fd7d5885
commit 67f1dcf604
1 changed files with 11 additions and 5 deletions
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16
testsuite/protected-regular.test
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@@ -10,22 +10,28 @@
. "$suitedir/rsync.fns"
test -f /proc/sys/fs/protected_regular || test_skipped "Can't find protected_regular setting (only available on Linux)"
pr_lvl=`cat /proc/sys/fs/protected_regular 2>/dev/null` || test_skipped "Can't check if fs.protected_regular is enabled (probably need root)"
pr_lvl=`cat /proc/sys/fs/protected_regular 2>/dev/null` || test_skipped "Can't check if fs.protected_regular is enabled"
test "$pr_lvl" != 0 || test_skipped "fs.protected_regular is not enabled"
workdir="$tmpdir/files"
mkdir "$workdir"
mkdir -p "$workdir"
chmod 1777 "$workdir"
echo "Source" > "$workdir/src"
echo "" > "$workdir/dst"
chown 5001 "$workdir/dst" || test_skipped "Can't chown (probably need root)"
# Output is only shown in case of an error
if ! chown 5001 "$workdir/dst" 2>/dev/null; then
# Not root - try re-running under unshare with UID mapping
if [ -z "$RSYNC_UNSHARED" ] && unshare --user --map-root-user --map-users 5001:100000:1 true 2>/dev/null; then
echo "Re-running under unshare with UID mapping..."
RSYNC_UNSHARED=1 exec unshare --user --map-root-user --map-users 5001:100000:1 "$SHELL_PATH" $RUNSHFLAGS "$0"
fi
test_skipped "Can't chown (need root or unshare with uidmap)"
fi
echo "Contents of $workdir:"
ls -al "$workdir"
$RSYNC --inplace "$workdir/src" "$workdir/dst" || test_fail
# The script would have aborted on error, so getting here means we've won.
exit 0