see ChangeLog

@@ -79,7 +79,13 @@ imap4d_copy0 (char *arg, int isuid, char *resp, size_t resplen)
       mailbox_name = strdup ((pw) ? pw->pw_name : "");
     }
   else
-    mailbox_name = util_getfullpath (name, delim);
+    mailbox_name = namespace_getfullpath (name, delim);
+
+  if (!mailbox_name)
+    {
+      snprintf (resp, resplen, "NO Create failed.");
+      return RESP_NO;
+    }
 
   /* If the destination mailbox does not exist, a server should return
      an error.  */

@@ -52,7 +52,10 @@ imap4d_create (struct imap4d_command *command, char *arg)
     return util_finish (command, RESP_BAD, "Already exist");
 
   /* Allocates memory.  */
-  name = util_getfullpath (name, delim);
+  name = namespace_getfullpath (name, delim);
+
+  if (!name)
+    return util_finish (command, RESP_NO, "Can not create mailbox");
 
   /* It will fail if the mailbox already exists.  */
   if (access (name, F_OK) != 0)

@@ -44,7 +44,9 @@ imap4d_delete (struct imap4d_command *command, char *arg)
     return util_finish (command, RESP_NO, "Already exist");
 
  /* Allocates memory.  */
-  name = util_getfullpath (name, delim);
+  name = namespace_getfullpath (name, delim);
+  if (!name)
+    return util_finish (command, RESP_NO, "Can not remove");
 
   if (remove (name) != 0)
     {

@@ -32,12 +32,14 @@ static struct option long_options[] =
   {"help", no_argument, 0, 'h'},
   {"inetd", no_argument, 0, 'i'},
   {"port", required_argument, 0, 'p'},
+  {"other-namespace", required_argument, 0, 'O'},
+  {"shared-namespace", required_argument, 0, 'S'},
   {"timeout", required_argument, 0, 't'},
   {"version", no_argument, 0, 'v'},
   {0, 0, 0, 0}
 };
 
-const char *short_options ="d::hip:t:v";
+const char *short_options ="d::hip:t:vO:P:S:";
 
 static int syslog_error_printer __P ((const char *fmt, va_list ap));
 static int imap4d_mainloop      __P ((int, int));
@@ -90,6 +92,14 @@ main (int argc, char **argv)
           port = strtoul (optarg, NULL, 10);
           break;
 
+	case 'O':
+	  set_namespace (NS_OTHER, optarg);
+	  break;
+
+	case 'S':
+	  set_namespace (NS_SHARED, optarg);
+	  break;
+	  
         case 't':
           timeout = strtoul (optarg, NULL, 10);
           break;

@@ -132,11 +132,18 @@ struct imap4d_command
 #define ERR_TIMEOUT 3
 #define ERR_SIGNAL 4
 
+/* Namespace numbers */
+#define NS_PRIVATE 0
+#define NS_OTHER   1
+#define NS_SHARED  2
+#define NS_MAX     3
+
 extern struct imap4d_command imap4d_command_table[];
 extern FILE *ofile;
 extern unsigned int timeout;
 extern mailbox_t mbox;
 extern char *homedir;
+extern char *rootdir;
 extern int state;
 extern volatile size_t children;
 
@@ -169,6 +176,7 @@ extern int  imap4d_store0 __P ((char *, int, char *, size_t));
 extern int  imap4d_subscribe __P ((struct imap4d_command *, char *));
 extern int  imap4d_uid __P ((struct imap4d_command *, char *));
 extern int  imap4d_unsubscribe __P ((struct imap4d_command *, char *));
+extern int  imap4d_namespace __P ((struct imap4d_command *, char *));
   
 /* Synchronisation on simultenous access.  */
 extern int imap4d_sync __P ((void));

@@ -141,7 +141,13 @@ imap4d_list (struct imap4d_command *command, char *arg)
 	}
 
       /* Allocates.  */
-      cwd = util_getfullpath (ref, delim);
+      cwd = namespace_checkfullpath (ref, wcard, delim);
+      if (!cwd)
+	{
+	  free (ref);
+	  return util_finish (command, RESP_NO,
+			      "The requested item could not be found.");
+	}
 
       /* If wcard match inbox return it too, part of the list.  */
       if (!*ref && (match ("INBOX", wcard, delim)
@@ -156,6 +162,7 @@ imap4d_list (struct imap4d_command *command, char *arg)
       free (cwd);
       free (ref);
     }
+
   return util_finish (command, RESP_OK, "Completed");
 }
 

@@ -136,9 +136,10 @@ imap4d_login (struct imap4d_command *command, char *arg)
   if (pw->pw_uid > 1)
     setuid (pw->pw_uid);
 
-  homedir = strdup (pw->pw_dir);
+  homedir = util_normalize_path (strdup (pw->pw_dir), "/");
   /* FIXME: Check for errors.  */
   chdir (homedir);
+  namespace_init(pw->pw_dir);
   syslog (LOG_INFO, "User '%s' logged in", username);
   return util_finish (command, RESP_OK, "Completed");
 }

@@ -26,5 +26,6 @@ imap4d_noop (struct imap4d_command *command, char *arg)
     return util_finish (command, RESP_BAD, "Wrong state");
   if (util_getword (arg, &sp))
     return util_finish (command, RESP_BAD, "Too many args");
+  imap4d_select_status();
   return util_finish (command, RESP_OK, "Completed");
 }

@@ -50,7 +50,9 @@ imap4d_rename (struct imap4d_command *command, char *arg)
     return util_finish (command, RESP_NO, "Name Inbox is reservered");
 
   /* Allocates memory.  */
-  newname = util_getfullpath (newname, delim);
+  newname = namespace_getfullpath (newname, delim);
+  if (!newname)
+    return util_finish (command, RESP_NO, "Permission denied");
 
   /* It is an error to attempt to rename from a mailbox name that already
      exist.  */
@@ -118,14 +120,15 @@ imap4d_rename (struct imap4d_command *command, char *arg)
       return util_finish (command, RESP_OK, "Already exist");
     }
 
-  oldname = util_getfullpath (oldname, delim);
+  oldname = namespace_getfullpath (oldname, delim);
 
   /* It must exist.  */
-  if (rename (oldname, newname) != 0)
+  if (!oldname || rename (oldname, newname) != 0)
     {
       rc = RESP_NO;
       msg = "Failed";
     }
+  if (oldname)
     free (oldname);
   free (newname);
   return util_finish (command, rc, msg);

@@ -17,6 +17,8 @@
 
 #include "imap4d.h"
 
+static int select_flags;
+
 /* select          ::= "SELECT" SPACE mailbox  */
 
 int
@@ -67,17 +69,39 @@ imap4d_select0 (struct imap4d_command *command, char *arg, int flags)
 	mailbox_name = strdup ("/dev/null");
     }
   else
-    mailbox_name = util_getfullpath (mailbox_name, "/");
+    mailbox_name = namespace_getfullpath (mailbox_name, "/");
+
+  if (!mailbox_name)
+    return util_finish (command, RESP_NO, "Couldn't open mailbox"); 
 
   if (mailbox_create (&mbox, mailbox_name) == 0
       && mailbox_open (mbox, flags) == 0)
     {
+      free (mailbox_name);
+      select_flags = flags;
+      state = STATE_SEL;
+      imap4d_select_status();
+      /* Need to set the state explicitely for select.  */
+      return util_send ("%s OK [%s] %s Completed\r\n", command->tag,
+			(MU_STREAM_READ == flags) ?
+			"READ-ONLY" : "READ-WRITE", command->name);
+    }
+  status = util_finish (command, RESP_NO, "Couldn't open %s", mailbox_name);
+  free (mailbox_name);
+  return status;
+}
+
+/* The code is shared between select and noop */
+void
+imap4d_select_status()
+{
   const char *mflags = "\\Answered \\Flagged \\Deleted \\Seen \\Draft";
   const char *pflags = "\\Answered \\Deleted \\Seen";
   unsigned long uidvalidity = 0;
   size_t count = 0, recent = 0, unseen = 0, uidnext = 0;
 
-      free (mailbox_name);
+  if (state != STATE_SEL)
+    return;
   
   mailbox_uidvalidity (mbox, &uidvalidity);
   mailbox_uidnext (mbox, &uidnext);
@@ -95,17 +119,8 @@ imap4d_select0 (struct imap4d_command *command, char *arg, int flags)
   /* FIXME:
      - '\*' can be supported if we use the attribute_set userflag()
      - Answered is still not set in the mailbox code.  */
-      if (flags == MU_STREAM_READ)
+  if (select_flags & MU_STREAM_READ)
     util_out (RESP_OK, "[PERMANENTFLAGS ()] No Permanent flags");
   else
     util_out (RESP_OK, "[PERMANENTFLAGS (%s)] Permanent flags", pflags);
-      /* Need to set the state explicitely for select.  */
-      state = STATE_SEL;
-      return util_send ("%s OK [%s] %s Completed\r\n", command->tag,
-			(MU_STREAM_READ == flags) ?
-			"READ-ONLY" : "READ-WRITE", command->name);
-    }
-  status = util_finish (command, RESP_NO, "Couldn't open %s", mailbox_name);
-  free (mailbox_name);
-  return status;
 }

@@ -51,7 +51,10 @@ imap4d_status (struct imap4d_command *command, char *arg)
       mailbox_name = strdup ((pw) ? pw->pw_name : "");
     }
   else
-    mailbox_name = util_getfullpath (name, delim);
+    mailbox_name = namespace_getfullpath (name, delim);
+
+  if (!mailbox_name)
+    return util_finish (command, RESP_NO, "Error opening mailbox");
 
   status = mailbox_create_default (&smbox, mailbox_name);
   if (status == 0)

@@ -138,6 +138,7 @@ imap4d_store0 (char *arg, int isuid, char *resp, size_t resplen)
 			}
 		      attribute_set_flags (attr, type);
 		    }
+		  attribute_set_flags (attr, MU_ATTRIBUTE_MODIFIED);
 		  flags = realloc (flags, strlen (flags) + strlen (item) + 2);
 		  if (*flags)
 		    strcat (flags, " ");

@@ -152,6 +152,71 @@ util_tilde_expansion (const char *ref, const char *delim)
   return p;
 }
 
+/* util_normalize_path: convert pathname containig relative paths specs (../)
+   into an equivalent absolute path. Strip trailing delimiter if present,
+   unless it is the only character left. E.g.:
+
+         /home/user/../smith   -->   /home/smith
+	 /home/user/../..      -->   /
+   
+   FIXME: delim is superfluous. The function deals with unix filesystem
+   paths, so delim should be always "/" */
+char *
+util_normalize_path (char *path, const char *delim)
+{
+  int len;
+  char *p;
+  
+  if (!path)
+    return path;
+
+  len = strlen (path);
+
+  /* Empty string is returned as is */
+  if (len == 0)
+    return path;
+  
+  /* delete trailing delimiter if any */
+  if (len && path[len-1] == delim[0])
+    path[len-1] = 0;
+
+  /* Eliminate any /../ */
+  for (p = strchr (path, '.'); p; p = strchr (p, '.'))
+    {
+      if (p > path && p[-1] == delim[0])
+	{
+	  if (p[1] == '.' && (p[2] == 0 || p[2] == delim[0]))
+	    /* found */
+	    {
+	      char *q, *s;
+
+	      /* Find previous delimiter */
+	      for (q = p-2; *q != delim[0] && q >= path; q--)
+		;
+
+	      if (q < path)
+		break;
+	      /* Copy stuff */
+	      s = p + 2;
+	      p = q;
+	      while (*q++ = *s++)
+		;
+	      continue;
+	    }
+	}
+
+      p++;
+    }
+
+  if (path[0] == 0)
+    {
+      path[0] = delim[0];
+      path[1] = 0;
+    }
+  
+  return path;
+}
+
 /* Get the absolute path.  */
 /* NOTE: Path is allocated and must be free()d by the caller.  */
 char *
@@ -165,7 +230,7 @@ util_getfullpath (char *name, const char *delim)
       free (p);
       p = s;
     }
-  return p;
+  return util_normalize_path (p, delim);
 }
 
 /* Return in set an allocated array contain (n) numbers, for imap messsage set
@@ -226,7 +291,7 @@ util_msgset (char *s, size_t **set, int *n, int isuid)
 		  {
 		    long tmp = low;
 		    tmp -= 2;
-		    if (tmp <= 0 || val == 0)
+		    if (tmp < 0 || val == 0)
 		      {
 			free (*set);
 			*n = 0;
@@ -245,7 +310,7 @@ util_msgset (char *s, size_t **set, int *n, int isuid)
 	      }
 	    else
 	      {
-		status = add2set(set, n, val);
+		status = add2set (set, n, val);
 		if (status != 0)
 		  return status;
 	      }
@@ -397,7 +462,7 @@ util_finish (struct imap4d_command *command, int rc, const char *format, ...)
 
   va_start (ap, format);
   status = vfprintf (ofile, buf, ap);
-  va_end(ap);
+  va_end (ap);
   free (buf);
   /* Reset the state.  */
   new_state = (rc == RESP_OK) ? command->success : command->failure;
@@ -610,3 +675,189 @@ add2set (size_t **set, int *n, unsigned long val)
   (*n)++;
   return 0;
 }
+
+static const char *months[] =
+{
+  "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+  "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+#define c2d(c) (c-'0')
+
+int
+util_parse_internal_date (char *date, time_t *timep)
+{
+  struct tm tm;
+  char *save;
+  int n, i;
+  int year, day, hour, min, sec;
+  char mon[4];
+  char sign[2];
+  char tzs[6];
+  time_t time;
+
+  memset (&tm, 0, sizeof (tm));
+  n = sscanf (date, "%2d-%3s-%4d %2d:%2d:%2d %5s\n",
+	      &day, mon, &year,
+	      &hour, &min, &sec, &tzs);
+
+  switch (n)
+    {
+    case 3:
+    case 6:
+    case 7:  break;
+    default: return 1;
+    }
+  
+  tm.tm_mday = day;
+  for (i = 0; i < 11; i++)
+    if (strncmp (months[i], mon, 3) == 0)
+      break;
+  if (i == 12)
+    return 1;
+  tm.tm_mon = i;
+  tm.tm_year = (year < 1900) ? year : year - 1900;
+
+  if (n >= 6)
+    {
+      tm.tm_hour = hour;
+      tm.tm_min = min;
+      tm.tm_sec = sec;
+    }
+  
+  tm.tm_isdst = -1; /* unknown. */
+
+  time = mktime (&tm);
+  if (time == (time_t) -1)
+    return 2;
+
+  if (n == 7)
+    {
+      int sign;
+      int tz;
+
+      if (strlen (tzs) != 5)
+	return 3;
+      
+      for (i = 1; i <= 4; i++)
+	if (!isdigit (tzs[i]))
+	  return 3;
+      
+      tz = (c2d (tzs[1])*10 + c2d (tzs[2]))*60 +
+	    c2d (tzs[3])*10 + c2d (tzs[4]);
+      if (tzs[0] == '-')
+	tz = -tz;
+      else if (tzs[0] != '+')
+	return 4;
+      time -= tz*60;
+    }
+  *timep = time;
+  return 0;
+}
+
+int
+util_parse_header_date (char *date, time_t *timep)
+{
+  struct tm tm;
+  char *save;
+  int n, i;
+  int year, day, hour, min, sec;
+  char wday[5];
+  char mon[4];
+  char sign[2];
+  char tzs[6];
+  time_t time;
+
+  memset (&tm, 0, sizeof (tm));
+  n = sscanf (date, "%3s, %2d %3s %4d %2d:%2d:%2d %5s",
+	      wday, &day, mon, &year,
+	      &hour, &min, &sec, &tzs); 
+
+  if (n < 7)
+    return 1;
+  
+  tm.tm_mday = day;
+  for (i = 0; i < 11; i++)
+    if (strncmp (months[i], mon, 3) == 0)
+      break;
+  if (i == 12)
+    return 1;
+  tm.tm_mon = i;
+  tm.tm_year = (year < 1900) ? year : year - 1900;
+
+  if (n >= 6)
+    {
+      tm.tm_hour = hour;
+      tm.tm_min = min;
+      tm.tm_sec = sec;
+    }
+  
+  tm.tm_isdst = -1; /* unknown. */
+
+  time = mktime (&tm);
+  if (time == (time_t) -1)
+    return 2;
+
+  if (n == 8)
+    {
+      int sign;
+      int tz;
+
+      if (strlen (tzs) != 5)
+	return 3;
+      
+      for (i = 1; i <= 4; i++)
+	if (!isdigit (tzs[i]))
+	  return 3;
+      
+      tz = (c2d (tzs[1])*10 + c2d (tzs[2]))*60 +
+	    c2d (tzs[3])*10 + c2d (tzs[4]);
+      if (tzs[0] == '-')
+	tz = -tz;
+      else if (tzs[0] != '+')
+	return 4;
+      time -= tz*60;
+    }
+  *timep = time;
+  return 0;
+}
+
+int
+util_parse_rfc822_date (char *date, time_t *timep)
+{
+  int year, mon, day, hour, min, sec;
+  int offt;
+  int i;
+  struct tm tm;
+  char month[5];
+  char wday[5];
+    
+  month[0] = '\0';
+  wday[0] = '\0';
+  day = mon = year = hour = min = sec = offt = 0;
+
+  /* RFC822 Date: format.  */
+  if (sscanf (date, "%3s %3s %2d %2d:%2d:%2d %d\n", wday, month, &day,
+	      &hour, &min, &sec, &year) != 7)
+    return 1;
+  tm.tm_sec = sec;
+  tm.tm_min = min;
+  tm.tm_hour = hour;
+  for (i = 0; i < 12; i++)
+    {
+      if (strncasecmp (month, months[i], 3) == 0)
+	{
+	  mon = i;
+	  break;
+	}
+    }
+  tm.tm_mday = day;
+  tm.tm_mon = mon;
+  tm.tm_year = (year > 1900) ? year - 1900 : year;
+  tm.tm_yday = 0; /* unknown. */
+  tm.tm_wday = 0; /* unknown. */
+  tm.tm_isdst = -1; /* unknown. */
+  /* What to do the timezone?  */
+  *timep = mktime (&tm);
+  return 0;
+}