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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>
38 lines
1.4 KiB
Bash
38 lines
1.4 KiB
Bash
#!/bin/sh
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# Copyright (C) 2021 by Achim Leitner <aleitner@lis-engineering.de>
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# This program is distributable under the terms of the GNU GPL (see COPYING)
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#
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# Modern linux systems have the protected_regular feature set to 1 or 2
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# See https://www.kernel.org/doc/Documentation/sysctl/fs.txt
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# Make sure we can still write these files in --inplace mode
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. "$suitedir/rsync.fns"
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test -f /proc/sys/fs/protected_regular || test_skipped "Can't find protected_regular setting (only available on Linux)"
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pr_lvl=`cat /proc/sys/fs/protected_regular 2>/dev/null` || test_skipped "Can't check if fs.protected_regular is enabled"
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test "$pr_lvl" != 0 || test_skipped "fs.protected_regular is not enabled"
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workdir="$tmpdir/files"
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mkdir -p "$workdir"
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chmod 1777 "$workdir"
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echo "Source" > "$workdir/src"
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echo "" > "$workdir/dst"
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if ! chown 5001 "$workdir/dst" 2>/dev/null; then
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# Not root - try re-running under unshare with UID mapping
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if [ -z "$RSYNC_UNSHARED" ] && unshare --user --map-root-user --map-users 5001:100000:1 true 2>/dev/null; then
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echo "Re-running under unshare with UID mapping..."
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RSYNC_UNSHARED=1 exec unshare --user --map-root-user --map-users 5001:100000:1 "$SHELL_PATH" $RUNSHFLAGS "$0"
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fi
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test_skipped "Can't chown (need root or unshare with uidmap)"
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fi
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echo "Contents of $workdir:"
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ls -al "$workdir"
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$RSYNC --inplace "$workdir/src" "$workdir/dst" || test_fail
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exit 0
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