Fix mu_parseopt. Add testsuite for it.

* include/mailutils/opt.h (mu_parseopt) <po_permuted>: New member.
* libmailutils/opt/help.c (print_option): Fix display of optional
arguments.
* libmailutils/opt/opt.c (next_opt,parse): Fix start-of-arguments
index.
Move permutation into a separate function.
* libmailutils/opt/progname.c (mu_set_progname): Remove eventual lt-
prefix.
* libmailutils/tests/Makefile.am: Add new tests.
* libmailutils/tests/parseopt.c: Use environment to control
mu_parseopt flags.
* libmailutils/tests/testsuite.at: Add new tests.
* libmailutils/tests/strtoc.at: Update.

* libmailutils/tests/parseopt00.at: New file.
* libmailutils/tests/parseopt01.at: New file.
* libmailutils/tests/parseopt02.at: New file.
* libmailutils/tests/parseopt03.at: New file.
* libmailutils/tests/parseopt04.at: New file.
* libmailutils/tests/parseopt05.at: New file.
* libmailutils/tests/parseopt06.at: New file.
* libmailutils/tests/parseopt07.at: New file.
* libmailutils/tests/parseopt08.at: New file.
* libmailutils/tests/parseopt09.at: New file.
* libmailutils/tests/parseopt10.at: New file.
* libmailutils/tests/parseopt11.at: New file.
* libmailutils/tests/parseopt12.at: New file.
* libmailutils/tests/parseopt13.at: New file.
* libmailutils/tests/parseopt14.at: New file.
* libmailutils/tests/parseopt15.at: New file.
* libmailutils/tests/parseopt16.at: New file.
* libmailutils/tests/parseopt17.at: New file.
* libmailutils/tests/parseopt18.at: New file.
* libmailutils/tests/parseopt19.at: New file.
* libmailutils/tests/parseopt20.at: New file.
* libmailutils/tests/parseopt21.at: New file.
* libmailutils/tests/parseopt22.at: New file.

@@ -148,7 +148,8 @@ struct mu_parseopt
   */
   int po_arg_start;
   int po_arg_count;
-  
+
+  unsigned po_permuted:1;           /* Whether the arguments were permuted */
 };
 
 int mu_parseopt (struct mu_parseopt *p,

@@ -132,7 +132,15 @@ print_option (struct mu_option **optbuf, size_t optcnt, size_t num,
   if (opt->opt_arg)
     {
       *argsused = 1;
-      w += printf ("%c%s", delim, gettext (opt->opt_arg));
+      if (opt->opt_flags & MU_OPTION_ARG_OPTIONAL)
+	{
+	  if (delim == '=')
+	    w += printf ("[=%s]", gettext (opt->opt_arg));
+	  else
+	    w += printf ("[%s]", gettext (opt->opt_arg));
+	}
+      else
+	w += printf ("%c%s", delim, gettext (opt->opt_arg));
     }
   if (w >= DESCRCOLUMN)
     {

@@ -228,6 +228,39 @@ find_long_option (struct mu_parseopt *po, char const *optstr,
   return NULL;  
 }
 
+static void
+permute (struct mu_parseopt *po)
+{
+  if (!(po->po_flags & MU_PARSEOPT_IN_ORDER) && po->po_arg_count)
+    {
+      /* Array to save arguments in */
+      char *save[2];
+      /* Number of arguments processed (at most two) */
+      int n = po->po_ind - (po->po_arg_start + po->po_arg_count);
+      
+      if (n > 2)
+	abort ();
+      
+      /* Store the processed elements away */
+      save[0] = po->po_argv[po->po_arg_start + po->po_arg_count];
+      if (n == 2)
+	save[1] = po->po_argv[po->po_arg_start + po->po_arg_count + 1];
+
+      /* Shift the array */
+      memmove (po->po_argv + po->po_arg_start + n,
+	       po->po_argv + po->po_arg_start,
+	       po->po_arg_count * sizeof (po->po_argv[0]));
+      
+      /* Place stored elements in the vacating slots */
+      po->po_argv[po->po_arg_start] = save[0];
+      if (n == 2)
+	po->po_argv[po->po_arg_start + 1] = save[1];
+      
+      /* Fix up start index */
+      po->po_arg_start += n;
+      po->po_permuted = 1;
+    }
+}
 
 /* Consume next option from PO.  On success, update PO members as
    described below and return 0.  On end of options, return 1.
@@ -247,38 +280,8 @@ next_opt (struct mu_parseopt *po)
 {
   if (!*po->po_cur)
     {
-      if (!(po->po_flags & MU_PARSEOPT_IN_ORDER) && po->po_arg_count)
-	{
-	  /* Array to save arguments in */
-	  char *save[2];
-	  /* Number of arguments processed (at most two) */
-	  int n = po->po_ind - (po->po_arg_start + po->po_arg_count);
-
-	  if (n > 2)
-	    abort ();
-
-	  /* Store the processed elements away */
-	  save[0] = po->po_argv[po->po_arg_start + po->po_arg_count];
-	  if (n == 2)
-	    save[1] = po->po_argv[po->po_arg_start + po->po_arg_count + 1];
-
-	  /* Shift the array */
-	  memmove (po->po_argv + po->po_arg_start + n,
-		   po->po_argv + po->po_arg_start,
-		   po->po_arg_count * sizeof (po->po_argv[0]));
-
-	  /* Place stored elements in the vacating slots */
-	  po->po_argv[po->po_arg_start] = save[0];
-	  if (n == 2)
-	    po->po_argv[po->po_arg_start + 1] = save[1];
-
-	  /* Fix up start index */
-	  po->po_arg_start += n;
-	}
+      permute (po);
       
-      if (po->po_ind == po->po_argc)
-	return 1;
-
       while (1)
 	{
 	  po->po_cur = po->po_argv[po->po_ind++];
@@ -288,6 +291,8 @@ next_opt (struct mu_parseopt *po)
 	    break;
 	  if (!(po->po_flags & MU_PARSEOPT_IN_ORDER))
 	    {
+	      if (!po->po_permuted)
+		po->po_arg_start = po->po_ind - 1;
 	      po->po_arg_count++;
 	      continue;
 	    }
@@ -298,8 +303,12 @@ next_opt (struct mu_parseopt *po)
       if (*++po->po_cur == '-')
 	{
 	  if (*++po->po_cur == 0)
-	    /* End of options */
-	    return 1;
+	    {
+	      /* End of options */
+	      permute (po);
+	      ++po->po_ind;
+	      return 1;
+	    }
 
 	  /* It's a long option */
 	  po->po_chr = 0;
@@ -331,9 +340,12 @@ parse (struct mu_parseopt *po)
 	{
 	  char *p = strrchr (po->po_argv[0], '/');
 	  if (p)
-	    po->po_prog_name = p + 1;
+	    p++;
 	  else
-	    po->po_prog_name = (char*) po->po_argv[0];
+	    p = (char*) po->po_argv[0];
+	  if (strlen (p) > 3 && memcmp (p, "lt-", 3) == 0)
+	    p += 3;
+	  po->po_prog_name = p;
 	}
     }
   else if (!(po->po_flags & MU_PARSEOPT_PROG_NAME))
@@ -341,6 +353,7 @@ parse (struct mu_parseopt *po)
 
   po->po_arg_start = po->po_ind;
   po->po_arg_count = 0;
+  po->po_permuted = 0;
   
   po->po_cur = "";
 
@@ -433,8 +446,8 @@ parse (struct mu_parseopt *po)
 	}
     }
 
-  if (po->po_arg_count)
-    po->po_ind = po->po_arg_start;
+  if (!po->po_permuted)
+    po->po_arg_start = po->po_ind - 1 - po->po_arg_count;
   return 0;
 }
 

@@ -38,6 +38,8 @@ mu_set_progname (char const *arg)
     ++p;
   else
     p = (char*) arg;
+  if (strlen (p) > 3 && memcmp (p, "lt-", 3) == 0)
+    p += 3;
   free (mu_progname);
   mu_progname = mu_strdup (p);
 }

@@ -104,6 +104,29 @@ TESTSUITE_AT = \
  modmesg03.at\
  modtofsaf.at\
  msgset.at\
+ parseopt00.at\
+ parseopt01.at\
+ parseopt02.at\
+ parseopt03.at\
+ parseopt04.at\
+ parseopt05.at\
+ parseopt06.at\
+ parseopt07.at\
+ parseopt08.at\
+ parseopt09.at\
+ parseopt10.at\
+ parseopt11.at\
+ parseopt12.at\
+ parseopt13.at\
+ parseopt14.at\
+ parseopt15.at\
+ parseopt16.at\
+ parseopt17.at\
+ parseopt18.at\
+ parseopt19.at\
+ parseopt20.at\
+ parseopt21.at\
+ parseopt22.at\
  prop.at\
  scantime.at\
  strftime.at\

@@ -21,8 +21,8 @@
 #include <mailutils/opt.h>
 
 char *file_name;
-char *find_value;
 char *opt_value = "initial";
+char *find_value;
 int jobs = 0;
 int x_option;
 int a_option;
@@ -34,9 +34,6 @@ struct mu_option group_a[] = {
     "set file name",
     mu_c_string, &file_name
   },
-  { "find", 'F', "VALUE", MU_OPTION_DEFAULT,
-    "find VALUE",
-    mu_c_string, &find_value },
   { "optional", 'o', "FILE", MU_OPTION_ARG_OPTIONAL,
     "optional argument",
     mu_c_string, &opt_value },
@@ -55,6 +52,9 @@ struct mu_option group_b[] = {
     "another option",
     mu_c_incr, &d_option },
   { "verbose", 'v', NULL, MU_OPTION_ALIAS },
+  { "find", 'F', "VALUE", MU_OPTION_DEFAULT,
+    "find VALUE",
+    mu_c_string, &find_value },
   { "jobs", 'j', "N", MU_OPTION_DEFAULT,
     "sets numeric value",
     mu_c_int, &jobs },
@@ -71,23 +71,40 @@ main (int argc, char *argv[])
   struct mu_parseopt po;
   int rc;
   int i;
-
+  int flags = MU_PARSEOPT_DEFAULT;
+  
   mu_stdstream_setup (MU_STDSTREAM_RESET_NONE);
+
+  if (getenv ("MU_PARSEOPT_DEFAULT"))
+    flags = MU_PARSEOPT_DEFAULT;
+  else
+    {
+      if (getenv ("MU_PARSEOPT_IN_ORDER"))
+	flags |= MU_PARSEOPT_IN_ORDER;
+      if (getenv ("MU_PARSEOPT_IGNORE_ERRORS"))
+	flags |= MU_PARSEOPT_IGNORE_ERRORS;
+      if (getenv ("MU_PARSEOPT_IN_ORDER"))
+	flags |= MU_PARSEOPT_IN_ORDER;
+      if (getenv ("MU_PARSEOPT_NO_ERREXIT"))
+	flags |= MU_PARSEOPT_NO_ERREXIT;
+      if (getenv ("MU_PARSEOPT_NO_STDOPT"))
+	flags |= MU_PARSEOPT_NO_STDOPT;
+    }
   
-  rc = mu_parseopt (&po, argc, argv, optv, MU_PARSEOPT_DEFAULT);
+  rc = mu_parseopt (&po, argc, argv, optv, flags);
   printf ("rc=%d\n", rc);
   mu_parseopt_apply (&po);
 
-  argc -= po.po_ind;
-  argv += po.po_ind;
+  argc -= po.po_arg_start;
+  argv += po.po_arg_start;
 
   mu_parseopt_free (&po);
 
   printf ("file_name=%s\n", S(file_name));
-  printf ("find_value=%s\n", S(find_value));
   printf ("opt_value=%s\n", S(opt_value));
   printf ("x_option=%d\n", x_option);
   printf ("a_option=%d\n", a_option);
+  printf ("find_value=%s\n", S(find_value));
   printf ("d_option=%d\n", d_option);
   printf ("jobs=%d\n", jobs);
   

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([empty command line])
+AT_KEYWORDS([parseopt parseopt00])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=initial
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([command line without options])
+AT_KEYWORDS([parseopt parseopt_noopt parseopt01])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=initial
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([short options])
+AT_KEYWORDS([parseopt parseopt_short parseopt02])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt -f file -x -a -d command line arguments
+],
+[0],
+[rc=0
+file_name=file
+opt_value=initial
+x_option=1
+a_option=1
+find_value=(null)
+d_option=1
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([short option with argument])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_arg parseopt03])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt -ffile -x -a -d command line arguments
+],
+[0],
+[rc=0
+file_name=file
+opt_value=initial
+x_option=1
+a_option=1
+find_value=(null)
+d_option=1
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([short option with optional argument])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_opt_arg parseopt04])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt -ofile command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=file
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([short option without optional argument])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_opt_noarg parseopt05])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt -o command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=(null)
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([incremental short option])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_incr parseopt06])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt -d -d command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=initial
+x_option=0
+a_option=0
+find_value=(null)
+d_option=2
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([short option clustering])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_cluster parseopt07])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt -xffile -dado10 command line arguments
+],
+[0],
+[rc=0
+file_name=file
+opt_value=10
+x_option=1
+a_option=1
+find_value=(null)
+d_option=2
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([long options])
+AT_KEYWORDS([parseopt parseopt_long parseopt08])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --file=file --all command line arguments
+],
+[0],
+[rc=0
+file_name=file
+opt_value=initial
+x_option=0
+a_option=1
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([long option with argument])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_arg parseopt09])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --file file command line arguments
+],
+[0],
+[rc=0
+file_name=file
+opt_value=initial
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([long option with optional argument])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_opt_arg parseopt10])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --optional=file command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=file
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([long option without optional argument])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_opt_noarg parseopt11])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --optional command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=(null)
+x_option=0
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([incremental long option])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_incr parseopt12])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --debug --debug command line arguments
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=initial
+x_option=0
+a_option=0
+find_value=(null)
+d_option=2
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([abbreviated long options])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_abbr parseopt13])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --fil=file --fin=Word command line arguments
+],
+[0],
+[rc=0
+file_name=file
+opt_value=initial
+x_option=0
+a_option=0
+find_value=Word
+d_option=0
+jobs=0
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([ambiguous abbreviated long options])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_abbr parseopt_long_ambig parseopt14])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --fi=file --fi=Word command line arguments
+],
+[1],
+[],
+[parseopt: option '--fi' is ambiguous; possibilities:
+--file
+--find
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([mixed long and short options])
+AT_KEYWORDS([parseopt parseopt_long parseopt_short parseopt15.at])
+AT_CHECK([
+MU_PARSEOPT_DEFAULT=1
+parseopt --file=filename -o -xa --find word -j10 command line arguments
+],
+[0],
+[rc=0
+file_name=filename
+opt_value=(null)
+x_option=1
+a_option=1
+find_value=word
+d_option=0
+jobs=10
+argv:
+0: command
+1: line
+2: arguments
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([option aliases])
+AT_KEYWORDS([parseopt parseopt_long parseopt_short parseopt16.at])
+AT_CHECK([
+parseopt -vvv
+],
+[0],
+[rc=0
+file_name=(null)
+opt_value=initial
+x_option=0
+a_option=0
+find_value=(null)
+d_option=3
+jobs=0
+argv:
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([argument permutation])
+AT_KEYWORDS([parseopt parseopt_long parseopt_short parseopt17.at])
+AT_CHECK([
+parseopt more --file=file arguments follow -x -o options
+],
+[0],
+[rc=0
+file_name=file
+opt_value=(null)
+x_option=1
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: more
+1: arguments
+2: follow
+3: options
+])
+AT_CLEANUP

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([double-dash])
+AT_KEYWORDS([parseopt parseopt_long parseopt_short parseopt_double_dash parseopt18.at])
+AT_CHECK([
+parseopt -x --file=foobar -- -a --optional arg
+],
+[0],
+[rc=0
+file_name=foobar
+opt_value=initial
+x_option=1
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: -a
+1: --optional
+2: arg
+])
+AT_CLEANUP
+

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([double-dash with permutation])
+AT_KEYWORDS([parseopt parseopt_long parseopt_short parseopt_double_dash parseopt19.at])
+AT_CHECK([
+parseopt -x more --file=foobar -- -a --optional arg
+],
+[0],
+[rc=0
+file_name=foobar
+opt_value=initial
+x_option=1
+a_option=0
+find_value=(null)
+d_option=0
+jobs=0
+argv:
+0: more
+1: -a
+2: --optional
+3: arg
+])
+AT_CLEANUP
+

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([short option without required argument])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_noarg parseopt20])
+AT_CHECK([
+parseopt -f
+],
+[1],
+[],
+[parseopt: option '-f' requires an argument
+])
+AT_CLEANUP
\ No newline at end of file

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([long option without required argument])
+AT_KEYWORDS([parseopt parseopt_long parseopt_long_noarg parseopt21])
+AT_CHECK([
+parseopt --file
+],
+[1],
+[],
+[parseopt: option '--file' requires an argument
+])
+AT_CLEANUP
\ No newline at end of file

+# This file is part of GNU Mailutils. -*- Autotest -*-
+# Copyright (C) 2016 Free Software Foundation, Inc.
+#
+# GNU Mailutils 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, or (at
+# your option) any later version.
+#
+# GNU Mailutils 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 GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
+
+AT_SETUP([unrecognized option])
+AT_KEYWORDS([parseopt parseopt_short parseopt_short_unrecognized parseopt22])
+AT_CHECK([
+parseopt -X
+],
+[1],
+[],
+[parseopt: unrecognized option '-X'
+])
+AT_CLEANUP
\ No newline at end of file

@@ -15,7 +15,5 @@
 # along with GNU Mailutils.  If not, see <http://www.gnu.org/licenses/>.
 
 AT_SETUP([mu_str_to_c])
-
 AT_CHECK([strtoc])
-
 AT_CLEANUP

@@ -56,6 +56,31 @@ AT_INIT
 AT_BANNER([Conversions])
 m4_include([strtoc.at])
 
+AT_BANNER([Command line parser])
+m4_include([parseopt00.at])
+m4_include([parseopt01.at])
+m4_include([parseopt02.at])
+m4_include([parseopt03.at])
+m4_include([parseopt04.at])
+m4_include([parseopt05.at])
+m4_include([parseopt06.at])
+m4_include([parseopt07.at])
+m4_include([parseopt08.at])
+m4_include([parseopt09.at])
+m4_include([parseopt10.at])
+m4_include([parseopt11.at])
+m4_include([parseopt12.at])
+m4_include([parseopt13.at])
+m4_include([parseopt14.at])
+m4_include([parseopt15.at])
+m4_include([parseopt16.at])
+m4_include([parseopt17.at])
+m4_include([parseopt18.at])
+m4_include([parseopt19.at])
+m4_include([parseopt20.at])
+m4_include([parseopt21.at])
+m4_include([parseopt22.at])
+
 AT_BANNER([Standard streams])
 m4_include([strin.at])
 m4_include([strout.at])