Improve checks for incompatible options.

* src/common.h (READ_LIKE_SUBCOMMAND): Remove define.
* src/tar.c (IS_SUBCOMMAND_CLASS): New macro.
(decode_options): Use IS_SUBCOMMAND_CLASS in checking
option compatibility.
Accept the --verify option only with subcommands that
write to the archive.

* tests/opcomp01.at: New test case.
* tests/opcomp02.at: New test case.
* tests/opcomp03.at: New test case.
* tests/opcomp04.at: New test case.
* tests/opcomp05.at: New test case.
* tests/opcomp06.at: New test case.
* tests/Makefile.am: Add new testcases.
* tests/testsuite.at: Likewise.

src/common.h

@@ -96,11 +96,6 @@ enum subcommand
 
 GLOBAL enum subcommand subcommand_option;
 
-#define READ_LIKE_SUBCOMMAND                    \
-  (subcommand_option == EXTRACT_SUBCOMMAND      \
-   || subcommand_option == DIFF_SUBCOMMAND      \
-   || subcommand_option == LIST_SUBCOMMAND)
-
 /* Selected format for output archive.  */
 GLOBAL enum archive_format archive_format;
 

src/tar.c

@@ -2346,7 +2346,29 @@ static const char *tar_authors[] = {
   "Jay Fenlason",
   NULL
 };
+
+/* Subcommand classes */
+#define SUBCL_READ    0x01   /* subcommand reads from the archive */
+#define SUBCL_WRITE   0x02   /* subcommand writes to the archive */
+#define SUBCL_UPDATE  0x04   /* subcommand updates existing archive */
+#define SUBCL_TEST    0x08   /* subcommand tests archive header or meta-info */
+
+static int subcommand_class[] = {
+  /* UNKNOWN_SUBCOMMAND */     0,
+  /* APPEND_SUBCOMMAND  */     SUBCL_WRITE|SUBCL_UPDATE,
+  /* CAT_SUBCOMMAND     */     SUBCL_WRITE,
+  /* CREATE_SUBCOMMAND  */     SUBCL_WRITE,
+  /* DELETE_SUBCOMMAND  */     SUBCL_WRITE|SUBCL_UPDATE,
+  /* DIFF_SUBCOMMAND    */     SUBCL_READ,
+  /* EXTRACT_SUBCOMMAND */     SUBCL_READ,
+  /* LIST_SUBCOMMAND    */     SUBCL_READ,
+  /* UPDATE_SUBCOMMAND  */     SUBCL_WRITE|SUBCL_UPDATE,
+  /* TEST_LABEL_SUBCOMMAND */  SUBCL_TEST
+};
 
+/* Return t if the subcommand_option is in class(es) f */
+#define IS_SUBCOMMAND_CLASS(f) (subcommand_class[subcommand_option] & (f))
+  
 static void
 decode_options (int argc, char **argv)
 {
@@ -2510,12 +2532,10 @@ decode_options (int argc, char **argv)
       if (!args.input_files)
 	USAGE_ERROR ((0, 0,
 		      _("--occurrence is meaningless without a file list")));
-      if (subcommand_option != DELETE_SUBCOMMAND
-	  && subcommand_option != DIFF_SUBCOMMAND
-	  && subcommand_option != EXTRACT_SUBCOMMAND
-	  && subcommand_option != LIST_SUBCOMMAND)
-	    USAGE_ERROR ((0, 0,
-			  _("--occurrence cannot be used in the requested operation mode")));
+      if (!IS_SUBCOMMAND_CLASS (SUBCL_READ))
+	USAGE_ERROR ((0, 0,
+		      _("--occurrence cannot be used with %s"),
+		      subcommand_string (subcommand_option)));
     }
 
   if (archive_names == 0)
@@ -2574,15 +2594,16 @@ decode_options (int argc, char **argv)
 	USAGE_ERROR ((0, 0, _("Cannot verify multi-volume archives")));
       if (use_compress_program_option)
 	USAGE_ERROR ((0, 0, _("Cannot verify compressed archives")));
+      if (!IS_SUBCOMMAND_CLASS (SUBCL_WRITE))
+	USAGE_ERROR ((0, 0, _("--verify cannot be used with %s"),
+		      subcommand_string (subcommand_option)));
     }
 
   if (use_compress_program_option)
     {
       if (multi_volume_option)
 	USAGE_ERROR ((0, 0, _("Cannot use multi-volume compressed archives")));
-      if (subcommand_option == UPDATE_SUBCOMMAND
-	  || subcommand_option == APPEND_SUBCOMMAND
-	  || subcommand_option == DELETE_SUBCOMMAND)
+      if (IS_SUBCOMMAND_CLASS (SUBCL_UPDATE))
 	USAGE_ERROR ((0, 0, _("Cannot update compressed archives")));
       if (subcommand_option == CAT_SUBCOMMAND)
 	USAGE_ERROR ((0, 0, _("Cannot concatenate compressed archives")));
@@ -2594,24 +2615,24 @@ decode_options (int argc, char **argv)
      --gray */
   if (args.pax_option
       && archive_format != POSIX_FORMAT
-      && !READ_LIKE_SUBCOMMAND)
+      && !IS_SUBCOMMAND_CLASS (SUBCL_READ))
     USAGE_ERROR ((0, 0, _("--pax-option can be used only on POSIX archives")));
 
   /* star creates non-POSIX typed archives with xattr support, so allow the
-     extra headers whenn reading */
+     extra headers when reading */
   if ((acls_option > 0)
       && archive_format != POSIX_FORMAT
-      && !READ_LIKE_SUBCOMMAND)
+      && !IS_SUBCOMMAND_CLASS (SUBCL_READ))
     USAGE_ERROR ((0, 0, _("--acls can be used only on POSIX archives")));
 
   if ((selinux_context_option > 0)
       && archive_format != POSIX_FORMAT
-      && !READ_LIKE_SUBCOMMAND)
+      && !IS_SUBCOMMAND_CLASS (SUBCL_READ))
     USAGE_ERROR ((0, 0, _("--selinux can be used only on POSIX archives")));
 
   if ((xattrs_option > 0)
       && archive_format != POSIX_FORMAT
-      && !READ_LIKE_SUBCOMMAND)
+      && !IS_SUBCOMMAND_CLASS (SUBCL_READ))
     USAGE_ERROR ((0, 0, _("--xattrs can be used only on POSIX archives")));
 
   /* If ready to unlink hierarchies, so we are for simpler files.  */

tests/Makefile.am

@@ -134,6 +134,12 @@ TESTSUITE_AT = \
  multiv07.at\
  multiv08.at\
  old.at\
+ opcomp01.at\
+ opcomp02.at\
+ opcomp03.at\
+ opcomp04.at\
+ opcomp05.at\
+ opcomp06.at\
  options.at\
  options02.at\
  owner.at\

tests/opcomp01.at

@@ -0,0 +1,34 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2013 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/>.
+
+AT_SETUP([occurrence compatibility])
+AT_KEYWORDS([opcomp opcomp01])
+
+AT_CHECK([
+tar --occurrence=1 -cf test.tar .
+],
+[2],
+[],
+[tar: --occurrence cannot be used with -c
+Try 'tar --help' or 'tar --usage' for more information.
+])
+
+AT_CLEANUP
+

tests/opcomp02.at

@@ -0,0 +1,34 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2013 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/>.
+
+AT_SETUP([occurrence compatibility])
+AT_KEYWORDS([opcomp opcomp02])
+
+AT_CHECK([
+tar --occurrence=1 -tf test.tar
+],
+[2],
+[],
+[tar: --occurrence is meaningless without a file list
+Try 'tar --help' or 'tar --usage' for more information.
+])
+
+AT_CLEANUP
+

tests/opcomp03.at

@@ -0,0 +1,34 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2013 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/>.
+
+AT_SETUP([--verify compatibility])
+AT_KEYWORDS([opcomp opcomp03])
+
+AT_CHECK([
+tar -tWf test.tar .
+],
+[2],
+[],
+[tar: --verify cannot be used with -t
+Try 'tar --help' or 'tar --usage' for more information.
+])
+
+AT_CLEANUP
+

tests/opcomp04.at

@@ -0,0 +1,38 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2013 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/>.
+
+AT_SETUP([compress option compatibility])
+AT_KEYWORDS([opcomp opcomp04])
+
+AT_CHECK([
+AT_GZIP_PREREQ
+genfile --file file
+tar czf test.tar file
+genfile --file newfile
+tar rzf test.tar newfile
+],
+[2],
+[],
+[tar: Cannot update compressed archives
+Try 'tar --help' or 'tar --usage' for more information.
+])
+
+AT_CLEANUP
+

tests/opcomp05.at

@@ -0,0 +1,34 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2013 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/>.
+
+AT_SETUP([--pax-option compatibility])
+AT_KEYWORDS([opcomp opcomp05])
+
+AT_CHECK([
+tar -Hgnu -cf test.tar --pax-option user:=root .
+],
+[2],
+[],
+[tar: --pax-option can be used only on POSIX archives
+Try 'tar --help' or 'tar --usage' for more information.
+])
+
+AT_CLEANUP
+

tests/opcomp06.at

@@ -0,0 +1,36 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2013 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/>.
+
+AT_SETUP([--pax-option compatibility])
+AT_KEYWORDS([opcomp opcomp06])
+
+AT_CHECK([
+AT_ACLS_PREREQ
+genfile --file file
+tar -cf test.tar --acls -Hgnu file
+],
+[2],
+[],
+[tar: --acls can be used only on POSIX archives
+Try 'tar --help' or 'tar --usage' for more information.
+])
+
+AT_CLEANUP
+

tests/testsuite.at

@@ -188,20 +188,40 @@ m4_include([pipe.at])
 m4_include([options.at])
 m4_include([options02.at])
 
+AT_BANNER([Option compatibility])
+m4_include([opcomp01.at])
+m4_include([opcomp02.at])
+m4_include([opcomp03.at])
+m4_include([opcomp04.at])
+m4_include([opcomp05.at])
+m4_include([opcomp06.at])
+
+AT_BANNER([The -T option])
 m4_include([T-empty.at])
 m4_include([T-null.at])
 
+AT_BANNER([Various options])
 m4_include([indexfile.at])
 m4_include([verbose.at])
+m4_include([gzip.at])
+m4_include([recurse.at])
+m4_include([shortrec.at])
+
+AT_BANNER([The --same-order option])
+m4_include([same-order01.at])
+m4_include([same-order02.at])
 
+AT_BANNER([Append])
 m4_include([append.at])
 m4_include([append01.at])
 m4_include([append02.at])
 m4_include([append03.at])
 
+AT_BANNER([Transforms])
 m4_include([xform-h.at])
 m4_include([xform01.at])
 
+AT_BANNER([Exclude])
 m4_include([exclude.at])
 m4_include([exclude01.at])
 m4_include([exclude02.at])
@@ -220,12 +240,14 @@ m4_include([exclude14.at])
 m4_include([exclude15.at])
 m4_include([exclude16.at])
 
+AT_BANNER([Deletions])
 m4_include([delete01.at])
 m4_include([delete02.at])
 m4_include([delete03.at])
 m4_include([delete04.at])
 m4_include([delete05.at])
 
+AT_BANNER([Extracting])
 m4_include([extrac01.at])
 m4_include([extrac02.at])
 m4_include([extrac03.at])
@@ -245,17 +267,16 @@ m4_include([extrac16.at])
 m4_include([extrac17.at])
 m4_include([extrac18.at])
 m4_include([extrac19.at])
+m4_include([backup01.at])
 
+AT_BANNER([Volume label operations])
 m4_include([label01.at])
 m4_include([label02.at])
 m4_include([label03.at])
 m4_include([label04.at])
 m4_include([label05.at])
 
-m4_include([backup01.at])
-
-m4_include([gzip.at])
-
+AT_BANNER([Incremental archives])
 m4_include([incremental.at])
 m4_include([incr01.at])
 m4_include([incr02.at])
@@ -269,9 +290,11 @@ m4_include([incr04.at])
 m4_include([incr05.at])
 m4_include([incr06.at])
 
+AT_BANNER([Files removed while archiving])
 m4_include([filerem01.at])
 m4_include([filerem02.at])
 
+AT_BANNER([Renames])
 m4_include([rename01.at])
 m4_include([rename02.at])
 m4_include([rename03.at])
@@ -279,21 +302,26 @@ m4_include([rename04.at])
 m4_include([rename05.at])
 m4_include([chtype.at])
 
+AT_BANNER([Ignore failing reads])
 m4_include([ignfail.at])
 
+AT_BANNER([Link handling])
 m4_include([link01.at])
 m4_include([link02.at])
 m4_include([link03.at])
 m4_include([link04.at])
 
+AT_BANNER([Specific archive formats])
 m4_include([longv7.at])
 m4_include([long01.at])
 m4_include([lustar01.at])
 m4_include([lustar02.at])
 m4_include([lustar03.at])
+m4_include([old.at])
 
 m4_include([time01.at])
 
+AT_BANNER([Multivolume archives])
 m4_include([multiv01.at])
 m4_include([multiv02.at])
 m4_include([multiv03.at])
@@ -303,16 +331,10 @@ m4_include([multiv06.at])
 m4_include([multiv07.at])
 m4_include([multiv08.at])
 
-m4_include([old.at])
+AT_BANNER([Owner and Groups])
 m4_include([owner.at])
 
-m4_include([recurse.at])
-
-m4_include([same-order01.at])
-m4_include([same-order02.at])
-
-m4_include([shortrec.at])
-
+AT_BANNER([Sparse files])
 m4_include([sparse01.at])
 m4_include([sparse02.at])
 m4_include([sparse03.at])
@@ -322,28 +344,33 @@ m4_include([spmvp00.at])
 m4_include([spmvp01.at])
 m4_include([spmvp10.at])
 
+AT_BANNER([Updates])
 m4_include([update.at])
 m4_include([update01.at])
 m4_include([update02.at])
 
+AT_BANNER([Verifying the archive])
 m4_include([verify.at])
 
+AT_BANNER([Volume operations])
 m4_include([volume.at])
 m4_include([volsize.at])
 
+AT_BANNER()
 m4_include([comprec.at])
 m4_include([shortfile.at])
 m4_include([shortupd.at])
 
 m4_include([truncate.at])
 m4_include([grow.at])
+m4_include([sigpipe.at])
 
+AT_BANNER([Removing files after archiving])
 m4_include([remfiles01.at])
 m4_include([remfiles02.at])
 m4_include([remfiles03.at])
 
-m4_include([sigpipe.at])
-
+AT_BANNER([Extended attributes])
 m4_include([xattr01.at])
 m4_include([xattr02.at])
 m4_include([xattr03.at])
@@ -358,6 +385,7 @@ m4_include([selacl01.at])
 
 m4_include([capabs_raw01.at])
 
+AT_BANNER([Star tests])
 m4_include([star/gtarfail.at])
 m4_include([star/gtarfail2.at])