These files should be in the repository, too %-)

+/* GNU mailutils - a suite of utilities for electronic mail
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#ifndef _IMAP4D_H
+#define _IMAP4D_H 1
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <syslog.h>
+#include <pwd.h>
+#include <grp.h>
+#include <stdarg.h>
+#include <sys/time.h>
+#include <sys/stat.h>
+
+#include <argp.h>
+
+#include <mailutils/mailbox.h>
+#include <mailutils/message.h>
+#include <mailutils/header.h>
+#include <mailutils/body.h>
+
+#include <argcv.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __P
+# ifdef __STDC__
+#  define __P(args) args
+# else
+#  define __P(args) ()
+# endif
+#endif /*__P */
+
+/* Type definitions */
+#ifndef Function
+typedef int Function ();
+#endif
+
+struct imap4d_command {
+  char *name;
+  Function *func;
+  int states;
+};
+
+/* Global variables and constants*/
+#define STATE_NONE	1<<0
+#define STATE_NONAUTH	1<<1
+#define STATE_AUTH	1<<2
+#define STATE_SEL	1<<3
+#define STATE_LOGOUT	1<<4
+
+#define STATE_ALL	(STATE_NONE | STATE_NONAUTH | STATE_AUTH | STATE_SEL \
+			| STATE_LOGOUT)
+
+#define TAG_NONE	0
+#define TAG_SEQ		1
+
+#define RESP_OK		0
+#define RESP_BAD	1
+#define RESP_NO		2
+
+extern const struct imap4d_command imap4d_command_table[];
+
+/* Functions */
+int imap4d_capability __P ((int argc, char **argv));
+int imap4d_noop __P ((int argc, char **argv));
+int imap4d_logout __P ((int argc, char **argv));
+int imap4d_authenticate __P ((int argc, char **argv));
+int imap4d_login __P ((int argc, char **argv));
+int imap4d_select __P ((int argc, char **argv));
+int imap4d_examine __P ((int argc, char **argv));
+int imap4d_create __P ((int argc, char **argv));
+int imap4d_delete __P ((int argc, char **argv));
+int imap4d_rename __P ((int argc, char **argv));
+int imap4d_subscribe __P ((int argc, char **argv));
+int imap4d_unsubscribe __P ((int argc, char **argv));
+int imap4d_list __P ((int argc, char **argv));
+int imap4d_lsub __P ((int argc, char **argv));
+int imap4d_status __P ((int argc, char **argv));
+int imap4d_append __P ((int argc, char **argv));
+int imap4d_check __P ((int argc, char **argv));
+int imap4d_close __P ((int argc, char **argv));
+int imap4d_expunge __P ((int argc, char **argv));
+int imap4d_search __P ((int argc, char **argv));
+int imap4d_fetch __P ((int argc, char **argv));
+int imap4d_store __P ((int argc, char **argv));
+int imap4d_copy __P ((int argc, char **argv));
+int imap4d_uid __P ((int argc, char **argv));
+
+int util_out __P ((char *seq, int tag, char *f, ...));
+int util_start __P ((char *seq));
+int util_finish __P ((int argc, char **argv, int resp, char *f, ...));
+int util_getstate __P((void));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _IMAP4D_H */
+

+/* GNU mailutils - a suite of utilities for electronic mail
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "imap4d.h"
+
+/*
+ *
+ */
+
+int
+imap4d_login (int argc, char **argv)
+{
+  util_out (argv[0], TAG_NONE, "BAD %s Command not implemented", argv[1]);
+  return util_finish (argc, argv, RESP_BAD, "Command not implemented");
+}

+/* GNU mailutils - a suite of utilities for electronic mail
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "imap4d.h"
+
+/*
+ *
+ */
+
+int
+imap4d_logout (int argc, char **argv)
+{
+  util_out (argv[0], TAG_NONE, "BAD %s Command not implemented", argv[1]);
+  return util_finish (argc, argv, RESP_BAD, "Command not implemented");
+}

+/* GNU mailutils - a suite of utilities for electronic mail
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "imap4d.h"
+
+/*
+ *
+ */
+
+int
+imap4d_noop (int argc, char **argv)
+{
+  if (argc > 2)
+    return util_finish (argc, argv, RESP_BAD, "Too many arguments");
+  return util_finish (argc, argv, RESP_OK, "Completed");
+}

+/* argcv.c - simple functions for parsing input based on whitespace
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "argcv.h"
+
+/*
+ * takes a string and splits it into several strings, breaking at ' '
+ * command is the string to split
+ * the number of strings is placed into argc
+ * the split strings are put into argv
+ * returns 0 on success, nonzero on failure
+ */
+
+int
+argcv_get (const char *command, int *argc, char ***argv)
+{
+  int len = strlen (command);
+  int i = 0, j = 0;
+  int start = 0;
+
+  if (len < 1)
+    return 1;
+
+  *argc = 1;
+  
+  for (i = 0; i < len; i++)
+    if (command[i] == ' ')
+      (*argc)++;
+  
+  *argv = malloc ((*argc + 1) * sizeof (char *));
+
+  for (i = 0; i <= len; i++)
+    {
+      if (command[i] == ' ' || command[i] == '\0')
+	{
+	  (*argv)[j] = malloc ((i-start) * sizeof (char));
+	  if (argv[j] == NULL && (i-start > 0))
+	    return 1;
+	  strncpy ((*argv)[j], &command[start], i-start);
+	  (*argv)[j][i-start] = '\0';
+	  j++;
+	  start = i+1;
+	}
+    }
+  return 0;
+}
+
+/*
+ * frees all elements of an argv array
+ * argc is the number of elements
+ * argv is the array
+ */
+int
+argcv_free (int argc, char **argv)
+{
+  while (--argc >= 0)
+    free (argv[argc]);
+  free (argv);
+  return 1;
+}

+/* GNU mailutils - a suite of utilities for electronic mail
+   Copyright (C) 1999 Free Software Foundation, Inc.
+
+   This program 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 2, or (at your option)
+   any later version.
+
+   This program 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, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#ifndef _ARGCV_H
+#define _ARGCV_H 1
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef __P
+# ifdef __STDC__
+#  define __P(args) args
+# else
+#  define __P(args) ()
+# endif
+#endif /*__P */
+
+int argcv_get __P((const char *command, int *argc, char ***argv));
+int argcv_free __P((int argc, char **argv));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _ARGCV_H */
+