summaryrefslogtreecommitdiff
path: root/libproto/mh/mbox.c
blob: 619cf18d60897849513c1ff3d07fddfcb803f46f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001, 2002, 2003,
   2004, 2005 Free Software Foundation, Inc.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General
   Public License along with this library; if not, write to the
   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301 USA */

/* First draft by Sergey Poznyakoff */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#ifdef ENABLE_MH

#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <dirent.h>

#ifdef WITH_PTHREAD
# ifdef HAVE_PTHREAD_H
#  ifndef _XOPEN_SOURCE
#   define _XOPEN_SOURCE  500
#  endif
#  include <pthread.h>
# endif
#endif

#include <string.h>
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include <mailutils/attribute.h>
#include <mailutils/body.h>
#include <mailutils/debug.h>
#include <mailutils/envelope.h>
#include <mailutils/error.h>
#include <mailutils/header.h>
#include <mailutils/locker.h>
#include <mailutils/message.h>
#include <mailutils/mutil.h>
#include <mailutils/property.h>
#include <mailutils/stream.h>
#include <mailutils/url.h>
#include <mailutils/observer.h>
#include <mailbox0.h>
#include <registrar0.h>
#include <amd.h>

struct _mh_message
{
  struct _amd_message amd_message;
  size_t seq_number;        /* message sequence number */
};

static int
mh_message_cmp (struct _amd_message *a, struct _amd_message *b)
{
  struct _mh_message *ma = (struct _mh_message *) a;
  struct _mh_message *mb = (struct _mh_message *) b;
  if (ma->seq_number < mb->seq_number)
    return -1;
  else if (ma->seq_number > mb->seq_number)
    return 1;
  return 0;
}

static size_t
_mh_next_seq (struct _amd_data *amd)
{
  struct _mh_message *msg = (struct _mh_message *)
                              _amd_get_message (amd, amd->msg_count);
  return (msg ? msg->seq_number : 0) + 1;
}

/* Return filename for the message.
   NOTE: Allocates memory. */
static char *
_mh_message_name (struct _amd_message *amsg, int deleted)
{
  struct _mh_message *mhm = (struct _mh_message *) amsg;
  char *filename;
  size_t len = strlen (amsg->amd->name) + 32;
  filename = malloc (len);
  if (deleted)
    snprintf (filename, len, "%s/,%lu", amsg->amd->name,
	      (unsigned long) mhm->seq_number);
  else
    snprintf (filename, len, "%s/%lu", amsg->amd->name,
	      (unsigned long) mhm->seq_number);
  return filename;
}

/* Find the message with the given sequence number */
static struct _mh_message *
_mh_get_message_seq (struct _amd_data *amd, size_t seq)
{
  struct _mh_message msg;
  size_t index;
  
  msg.seq_number = seq;
  if (amd_msg_lookup (amd, (struct _amd_message*) &msg, &index))
    return NULL;

  return (struct _mh_message *) _amd_get_message (amd, index);
}

/* Scan the mailbox */
static int
mh_scan0 (mu_mailbox_t mailbox, size_t msgno ARG_UNUSED, size_t *pcount, 
          int do_notify)
{
  struct _amd_data *amd = mailbox->data;
  struct _mh_message *msg;
  DIR *dir;
  struct dirent *entry;
  int status = 0;
  struct stat st;

  if (amd == NULL)
    return EINVAL;

  dir = opendir (amd->name);
  if (!dir)
    return errno;

  mu_monitor_wrlock (mailbox->monitor);

#ifdef WITH_PTHREAD
  pthread_cleanup_push (amd_cleanup, (void *)mailbox);
#endif

  mu_locker_lock (mailbox->locker);

  /* Do actual work. */

  while ((entry = readdir (dir)))
    {
      char *namep;
      int attr_flags;
      size_t num;

      attr_flags = 0;
      switch (entry->d_name[0])
	{
	case '.':
	  /* FIXME: .mh_sequences */
	  continue;
	case ',':
	  continue;
#if 0
	  attr_flags |= MU_ATTRIBUTE_DELETED;
	  namep = entry->d_name+1;
	  break;
#endif
	case '0':case '1':case '2':case '3':case '4':
	case '5':case '6':case '7':case '8':case '9':
	  namep = entry->d_name;
	  break;
	default:
	  /*FIXME: Invalid entry. Report? */
	  continue;
	}

      num = strtoul (namep, &namep, 10);
      if (namep[0])
	continue;

      msg = _mh_get_message_seq (amd, num);
      if (!msg)
	{
	  msg = calloc (1, sizeof(*msg));

	  msg->seq_number = num;
	  msg->amd_message.attr_flags = attr_flags;
	  msg->amd_message.deleted = attr_flags & MU_ATTRIBUTE_DELETED;

	  _amd_message_insert (amd, (struct _amd_message*) msg);
	}
      else
	{
	  msg->amd_message.attr_flags = attr_flags;
	}
    }

  closedir (dir);

  if (do_notify)
    {
      size_t i;

      for (i = 0; i < amd->msg_count; i++)
	{
	  DISPATCH_ADD_MSG(mailbox, amd);
	}
    }
  
  if (stat (amd->name, &st) == 0)
    amd->mtime = st.st_mtime;

  if (pcount)
    *pcount = amd->msg_count;

  /* Reset the uidvalidity.  */
  if (amd->msg_count > 0)
    {
      if (amd->uidvalidity == 0)
	{
	  amd->uidvalidity = (unsigned long)time (NULL);
	  /* Tell that we have been modified for expunging.  */
	  if (amd->msg_count)
	    {
	      amd_message_stream_open (amd->msg_array[0]);
	      amd_message_stream_close (amd->msg_array[0]);
	      amd->msg_array[0]->attr_flags |= MU_ATTRIBUTE_MODIFIED;
	    }
	}
    }

  /* Clean up the things */

  amd_cleanup (mailbox);
#ifdef WITH_PTHREAD
  pthread_cleanup_pop (0);
#endif
  return status;
}

/* Note: In this particular implementation the message sequence number
   serves also as its UID. This allows to avoid many problems related
   to keeping the uids in the headers of the messages. */

static int
mh_message_uid (mu_message_t msg, size_t *puid)
{
  struct _mh_message *mhm = mu_message_get_owner (msg);
  if (puid)
    *puid = mhm->seq_number;
  return 0;
}

static int
_mh_msg_init (struct _amd_data *amd, struct _amd_message *amm)
{
  struct _mh_message *mhm = (struct _mh_message *) amm;
  mhm->seq_number = _mh_next_seq (amd);
  return 0;
}



int
_mailbox_mh_init (mu_mailbox_t mailbox)
{
  int rc;
  struct _amd_data *amd;

  rc = amd_init_mailbox (mailbox, sizeof (struct _amd_data), &amd);
  if (rc)
    return rc;

  amd->msg_size = sizeof (struct _mh_message);
  amd->msg_free = NULL;
  amd->msg_init_delivery = _mh_msg_init;
  amd->msg_finish_delivery = NULL;
  amd->msg_file_name = _mh_message_name;
  amd->scan0 = mh_scan0;
  amd->msg_cmp = mh_message_cmp;
  amd->message_uid = mh_message_uid;
  amd->next_uid = _mh_next_seq;
  
  /* Set our properties.  */
  {
    mu_property_t property = NULL;
    mu_mailbox_get_property (mailbox, &property);
    mu_property_set_value (property, "TYPE", "MH", 1);
  }

  return 0;
}

#endif

Return to:

Send suggestions and report system problems to the System administrator.