Fix handling of directories removed during incremental tar run

Co-authored-by: Sergey Poznyakoff <gray@gnu.org.ua>
* paxutils: Upgrade
* src/create.c (create_archive): Use file_removed_diag
instead of calling the corresponding *_diag function
directly.
* tests/dirrem01.at: New testcase.
* tests/dirrem02.at: New testcase.
* tests/Makefile.am: Add new tests.
* tests/testsuite.at: Likewise.

src/create.c

@@ -1395,13 +1395,15 @@ create_archive (void)
 					   open_searchdir_flags);
 			  if (fd < 0)
 			    {
-			      open_diag (p->name);
+			      file_removed_diag (p->name, !p->parent,
+						 open_diag);
 			      break;
 			    }
 			  st.fd = fd;
 			  if (fstat (fd, &st.stat) != 0)
 			    {
-			      stat_diag (p->name);
+			      file_removed_diag (p->name, !p->parent,
+						 stat_diag);
 			      break;
 			    }
 			  st.orig_file_name = xstrdup (p->name);

tests/Makefile.am

@@ -110,6 +110,8 @@ TESTSUITE_AT = \
  extrac20.at\
  filerem01.at\
  filerem02.at\
+ dirrem01.at\
+ dirrem02.at\
  gzip.at\
  grow.at\
  incremental.at\

tests/dirrem01.at

@@ -0,0 +1,62 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2017 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:
+#
+# When a directory in a deep directory disappeared during creation
+# of incremental dump, tar <= 1.29 exits with TAREXIT_FAILURE (2).
+#
+# In case of files tar does not return TAREXIT_FAILURE, but instead
+# it prints a warning and exits with TAREXIT_DIFFERS.
+#
+# This test checks whether this behaviour is mimicked for directories, too.
+
+# Remark: This file is based on 'filerem01.at', which is the test-case for
+# a vanishing file.
+
+AT_SETUP([directory removed before reading])
+AT_KEYWORDS([create incremental listed dirchange dirrem dirrem01])
+
+AT_TAR_CHECK([
+mkdir dir
+mkdir dir/sub
+genfile --file dir/file1
+genfile --file dir/sub/file2
+
+case "$TEST_TAR_FORMAT" in
+posix) CPT=5;;
+gnu)   CPT=3;;
+*)     AT_SKIP_TEST
+esac
+
+genfile --run --checkpoint=$CPT --unlink dir/sub/file2 --unlink dir/sub -- \
+       tar --blocking-factor=1 --checkpoint=1 --checkpoint-action='sleep=1' \
+       --checkpoint-action='echo' -c -f archive.tar \
+       --listed-incremental db -v dir >/dev/null
+],
+[1],
+[ignore],
+[tar: dir: Directory is new
+tar: dir/sub: Directory is new
+tar: dir/sub: File removed before we read it
+],[],[],[gnu,posix])
+
+AT_CLEANUP
+

tests/dirrem02.at

@@ -0,0 +1,60 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2017 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:
+#
+# When an explicitley named directory disappears during creation
+# of incremental dump, tar should still exit with TAREXIT_FAILURE (2).
+#
+# For further details see dirrem01.at
+
+# Remark: This file is based on 'filerem01/02.at', which are test-cases for
+# vanishing files.
+
+AT_SETUP([explicitly named directory removed before reading])
+AT_KEYWORDS([create incremental listed dirchange dirrem dirrem02])
+
+AT_TAR_CHECK([
+mkdir dir
+mkdir dir/sub
+genfile --file dir/file1
+genfile --file dir/sub/file2
+
+case "$TEST_TAR_FORMAT" in
+posix) CPT=5;;
+gnu)   CPT=3;;
+*)     AT_SKIP_TEST
+esac
+
+genfile --run --checkpoint=$CPT --unlink dir/sub/file2 --unlink dir/sub -- \
+       tar --blocking-factor=1 --checkpoint=1 --checkpoint-action='sleep=1' \
+       --checkpoint-action='echo' -c -f archive.tar \
+       --listed-incremental db -v dir dir/sub >/dev/null
+],
+[2],
+[ignore],
+[tar: dir: Directory is new
+tar: dir/sub: Directory is new
+tar: dir/sub: Cannot open: No such file or directory
+tar: Exiting with failure status due to previous errors
+],[],[],[gnu,posix])
+
+AT_CLEANUP
+

tests/testsuite.at

@@ -339,6 +339,10 @@ AT_BANNER([Files removed while archiving])
 m4_include([filerem01.at])
 m4_include([filerem02.at])
 
+AT_BANNER([Directories removed while archiving])
+m4_include([dirrem01.at])
+m4_include([dirrem02.at])
+
 AT_BANNER([Renames])
 m4_include([rename01.at])
 m4_include([rename02.at])