Add tests for cyclic renames

Using options to extract to a subdirectory: one test with -C,
another with --one-top-level.

tests/Makefile.am

@@ -244,6 +244,8 @@ TESTSUITE_AT = \
  rename04.at\
  rename05.at\
  rename06.at\
+ rename08.at\
+ rename09.at\
  same-order01.at\
  same-order02.at\
  selacl01.at\

tests/rename08.at

@@ -0,0 +1,131 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2006-2026 Free Software Foundation, Inc.
+
+# This file is part of GNU tar.
+
+# GNU tar 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; either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU tar is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Description: Handling of cyclic renames in incremental archives.
+
+AT_SETUP([cyclic renames])
+AT_KEYWORDS([incremental rename rename08 cyclic-rename])
+
+AT_TAR_CHECK([
+AT_SORT_PREREQ
+
+mkdir foo
+genfile --file foo/file1
+genfile --file foo/file2
+
+mkdir foo/a
+genfile --file foo/a/filea
+
+mkdir foo/b
+genfile --file foo/b/fileb
+
+mkdir foo/c
+genfile --file foo/c/filec
+
+sleep 1
+
+echo "First dump"
+echo "First dump">&2
+tar -g incr -cf arch.1 -v foo 2>tmperr
+sort tmperr >&2
+
+# Shuffle directories:
+(cd foo
+mv a $$
+mv c a
+mv b c
+mv $$ b)
+
+echo "Second dump"
+echo "Second dump" >&2
+tar -g incr -cf arch.2 -v foo 2>tmperr
+sort tmperr >&2
+
+mkdir -p restoreparent/restore
+cd restoreparent
+tar xfg ../arch.1 /dev/null --warning=no-timestamp -C restore
+
+echo "Begin directory listing 1"
+( cd restore; find foo ) | sort
+echo "End directory listing 1"
+
+tar xfgv ../arch.2 /dev/null --warning=no-timestamp -C restore
+echo Begin directory listing 2
+( cd restore ; find foo ) | sort
+echo End directory listing 2
+],
+[0],
+[First dump
+foo/
+foo/a/
+foo/b/
+foo/c/
+foo/file1
+foo/file2
+foo/a/filea
+foo/b/fileb
+foo/c/filec
+Second dump
+foo/
+foo/a/
+foo/b/
+foo/c/
+Begin directory listing 1
+foo
+foo/a
+foo/a/filea
+foo/b
+foo/b/fileb
+foo/c
+foo/c/filec
+foo/file1
+foo/file2
+End directory listing 1
+foo/
+foo/a/
+foo/b/
+foo/c/
+Begin directory listing 2
+foo
+foo/a
+foo/a/filec
+foo/b
+foo/b/filea
+foo/c
+foo/c/fileb
+foo/file1
+foo/file2
+End directory listing 2
+],
+[First dump
+tar: foo/a: Directory is new
+tar: foo/b: Directory is new
+tar: foo/c: Directory is new
+tar: foo: Directory is new
+Second dump
+tar: foo/a: Directory has been renamed from 'foo/c'
+tar: foo/b: Directory has been renamed from 'foo/a'
+tar: foo/c: Directory has been renamed from 'foo/b'
+],
+[],[],[gnu, oldgnu, posix])
+
+AT_CLEANUP
+
+# End of rename03.at

tests/rename09.at

@@ -0,0 +1,129 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2006-2026 Free Software Foundation, Inc.
+
+# This file is part of GNU tar.
+
+# GNU tar 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; either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU tar is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Description: Handling of cyclic renames in incremental archives.
+
+AT_SETUP([cyclic renames])
+AT_KEYWORDS([incremental rename rename09 cyclic-rename])
+
+AT_TAR_CHECK([
+AT_SORT_PREREQ
+
+mkdir foo
+genfile --file foo/file1
+genfile --file foo/file2
+
+mkdir foo/a
+genfile --file foo/a/filea
+
+mkdir foo/b
+genfile --file foo/b/fileb
+
+mkdir foo/c
+genfile --file foo/c/filec
+
+sleep 1
+
+echo "First dump"
+echo "First dump">&2
+tar -g incr -cf arch.1 -v foo 2>tmperr
+sort tmperr >&2
+
+# Shuffle directories:
+(cd foo
+mv a $$
+mv c a
+mv b c
+mv $$ b)
+
+echo "Second dump"
+echo "Second dump" >&2
+tar -g incr -cf arch.2 -v foo 2>tmperr
+sort tmperr >&2
+
+tar xfg arch.1 /dev/null --warning=no-timestamp --one-top-level=restore
+
+echo "Begin directory listing 1"
+( cd restore; find foo ) | sort
+echo "End directory listing 1"
+
+tar xfgv arch.2 /dev/null --warning=no-timestamp --one-top-level=restore
+echo Begin directory listing 2
+( cd restore ; find foo ) | sort
+echo End directory listing 2
+],
+[0],
+[First dump
+foo/
+foo/a/
+foo/b/
+foo/c/
+foo/file1
+foo/file2
+foo/a/filea
+foo/b/fileb
+foo/c/filec
+Second dump
+foo/
+foo/a/
+foo/b/
+foo/c/
+Begin directory listing 1
+foo
+foo/a
+foo/a/filea
+foo/b
+foo/b/fileb
+foo/c
+foo/c/filec
+foo/file1
+foo/file2
+End directory listing 1
+foo/
+foo/a/
+foo/b/
+foo/c/
+Begin directory listing 2
+foo
+foo/a
+foo/a/filec
+foo/b
+foo/b/filea
+foo/c
+foo/c/fileb
+foo/file1
+foo/file2
+End directory listing 2
+],
+[First dump
+tar: foo/a: Directory is new
+tar: foo/b: Directory is new
+tar: foo/c: Directory is new
+tar: foo: Directory is new
+Second dump
+tar: foo/a: Directory has been renamed from 'foo/c'
+tar: foo/b: Directory has been renamed from 'foo/a'
+tar: foo/c: Directory has been renamed from 'foo/b'
+],
+[],[],[gnu, oldgnu, posix])
+
+AT_CLEANUP
+
+# End of rename03.at

tests/testsuite.at

@@ -409,6 +409,8 @@ m4_include([rename03.at])
 m4_include([rename04.at])
 m4_include([rename05.at])
 m4_include([rename06.at])
+m4_include([rename08.at])
+m4_include([rename09.at])
 m4_include([chtype.at])
 
 AT_BANNER([Ignore failing reads])