masqmail-0.2: 9fb7ddbaf129 src/spool.c

masqmail-0.2

view src/spool.c @ 12:9fb7ddbaf129

removed noop-code; some beautifying

author	meillo@marmaro.de
date	Wed, 29 Oct 2008 16:34:13 +0100
parents	08114f7dcc23
children	f671821d8222

line source

1 /* MasqMail

4 This program is free software; you can redistribute it and/or modify

5 it under the terms of the GNU General Public License as published by

6 the Free Software Foundation; either version 2 of the License, or

7 (at your option) any later version.

9 This program is distributed in the hope that it will be useful,

10 but WITHOUT ANY WARRANTY; without even the implied warranty of

11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

12 GNU General Public License for more details.

14 You should have received a copy of the GNU General Public License

15 along with this program; if not, write to the Free Software

16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

17 */

19 #include "masqmail.h"

20 #include <sys/stat.h>

21 #include "dotlock.h"

23 static gint

24 read_line(FILE * in, gchar * buf, gint buf_len)

25 {

26 gint p = 0;

27 gint c;

29 while ((c = getc(in)) != '\n' && (c != EOF)) {

30 if (p >= buf_len - 1) {

31 return 0;

32 }

33 buf[p++] = c;

34 }

36 if (c == EOF) {

37 return -1;

38 }

39 if ((p > 0) && (buf[p - 1] == '\r'))

40 p--;

41 buf[p++] = '\n';

42 buf[p] = 0;

44 return p;

45 }

47 static void

48 spool_write_rcpt(FILE * out, address * rcpt)

49 {

50 gchar dlvrd_char = addr_is_delivered(rcpt) ? 'X' : (addr_is_failed(rcpt) ? 'F' : ' ');

52 if (rcpt->local_part[0] != '|') {

53 /* this is a paranoid check, in case it slipped through: */

54 /* if this happens, it is a bug */

55 if (rcpt->domain == NULL) {

56 logwrite(LOG_WARNING, "BUG: null domain for address %s, setting to %s\n", rcpt->local_part, conf.host_name);

57 logwrite(LOG_WARNING, "please report this bug.\n");

58 rcpt->domain = g_strdup(conf.host_name);

59 }

60 fprintf(out, "RT:%c%s\n", dlvrd_char, addr_string(rcpt));

61 } else {

62 fprintf(out, "RT:%c%s\n", dlvrd_char, rcpt->local_part);

63 }

64 }

66 static address*

67 spool_scan_rcpt(gchar * line)

68 {

69 address *rcpt = NULL;

71 if (line[3] != 0) {

72 if (line[4] != '|') {

73 rcpt = create_address(&(line[4]), TRUE);

74 } else {

75 rcpt = create_address_pipe(&(line[4]));

76 }

77 if (line[3] == 'X') {

78 addr_mark_delivered(rcpt);

79 } else if (line[3] == 'F') {

80 addr_mark_failed(rcpt);

81 }

82 }

83 return rcpt;

84 }

86 gboolean

87 spool_read_data(message * msg)

88 {

89 FILE *in;

90 gboolean ok = FALSE;

91 gchar *spool_file;

93 DEBUG(5) debugf("spool_read_data entered\n");

94 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);

95 DEBUG(5) debugf("reading data spool file '%s'\n", spool_file);

96 if ((in = fopen(spool_file, "r"))) {

97 char buf[MAX_DATALINE];

98 int len;

100 /* msg uid */

101 read_line(in, buf, MAX_DATALINE);

102

103 /* data */

104 msg->data_list = NULL;

105 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {

106 msg->data_list = g_list_prepend(msg->data_list, g_strdup(buf));

107 }

108 msg->data_list = g_list_reverse(msg->data_list);

109 fclose(in);

110 ok = TRUE;

111 } else

112 logwrite(LOG_ALERT, "could not open spool data file %s: %s\n", spool_file, strerror(errno));

113 return ok;

114 }

115

116 gboolean

117 spool_read_header(message * msg)

118 {

119 FILE *in;

120 gboolean ok = FALSE;

121 gchar *spool_file;

122

123 /* header spool: */

124 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);

125 if ((in = fopen(spool_file, "r"))) {

126 header *hdr = NULL;

127 char buf[MAX_DATALINE];

128 int len;

129

130 /* msg uid */

131 read_line(in, buf, MAX_DATALINE);

132

133 /* envelope header */

134 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {

135 if (buf[0] == '\n')

136 break;

137 else if (strncasecmp(buf, "MF:", 3) == 0) {

138 msg->return_path = create_address(&(buf[3]), TRUE);

139 DEBUG(3) debugf("spool_read: MAIL FROM: %s", msg->return_path->address);

140 } else if (strncasecmp(buf, "RT:", 3) == 0) {

141 address *addr;

142 addr = spool_scan_rcpt(buf);

143 if (!addr_is_delivered(addr) && !addr_is_failed(addr)) {

144 msg->rcpt_list = g_list_append(msg->rcpt_list, addr);

145 } else {

146 msg->non_rcpt_list = g_list_append(msg->non_rcpt_list, addr);

147 }

148 } else if (strncasecmp(buf, "PR:", 3) == 0) {

149 prot_id i;

150 for (i = 0; i < PROT_NUM; i++) {

151 if (strncasecmp(prot_names[i], &(buf[3]), strlen(prot_names[i])) == 0) {

152 break;

153 }

154 }

155 msg->received_prot = i;

156 } else if (strncasecmp(buf, "RH:", 3) == 0) {

157 g_strchomp(buf);

158 msg->received_host = g_strdup(&(buf[3]));

159 } else if (strncasecmp(buf, "ID:", 3) == 0) {

160 g_strchomp(buf);

161 msg->ident = g_strdup(&(buf[3]));

162 } else if (strncasecmp(buf, "DS:", 3) == 0) {

163 msg->data_size = atoi(&(buf[3]));

164 } else if (strncasecmp(buf, "TR:", 3) == 0) {

165 msg->received_time = (time_t) (atoi(&(buf[3])));

166 } else if (strncasecmp(buf, "TW:", 3) == 0) {

167 msg->warned_time = (time_t) (atoi(&(buf[3])));

168 }

169 /* so far ignore other tags */

170 }

171

172 /* mail headers */

173 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {

174 if (strncasecmp(buf, "HD:", 3) == 0) {

175 hdr = get_header(&(buf[3]));

176 msg->hdr_list = g_list_append(msg->hdr_list, hdr);

177 } else if ((buf[0] == ' ' || buf[0] == '\t') && hdr) {

178 char *tmp = hdr->header;

179 /* header continuation */

180 hdr->header = g_strconcat(hdr->header, buf, NULL);

181 hdr->value = hdr->header + (hdr->value - tmp);

182 } else

183 break;

184 }

185 fclose(in);

186 ok = TRUE;

187 } else

188 logwrite(LOG_ALERT, "could not open spool header file %s: %s\n", spool_file, strerror(errno));

189 return ok;

190 }

191

192 message*

193 msg_spool_read(gchar * uid, gboolean do_readdata)

194 {

195 message *msg;

196 gboolean ok = FALSE;

197

198 msg = create_message();

199 msg->uid = g_strdup(uid);

200

201 /* header spool: */

202 ok = spool_read_header(msg);

203 if (ok && do_readdata) {

204 /* data spool: */

205 ok = spool_read_data(msg);

206 }

207 return msg;

208 }

209

210 /* write header. uid and gid should already be set to the

211 mail ids. Better call spool_write(msg, FALSE).

212 */

213 static gboolean

214 spool_write_header(message * msg)

215 {

216 GList *node;

217 gchar *spool_file, *tmp_file;

218 FILE *out;

219 gboolean ok = TRUE;

220

221 /* header spool: */

222 tmp_file = g_strdup_printf("%s/input/%d-H.tmp", conf.spool_dir, getpid());

223 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);

224

225 if ((out = fopen(tmp_file, "w"))) {

226 DEBUG(6) debugf("opened tmp_file %s\n", tmp_file);

227

228 fprintf(out, "%s\n", msg->uid);

229 fprintf(out, "MF:%s\n", addr_string(msg->return_path));

230

231 DEBUG(6) debugf("after MF\n");

232 foreach(msg->rcpt_list, node) {

233 address *rcpt = (address *) (node->data);

234 spool_write_rcpt(out, rcpt);

235 }

236 foreach(msg->non_rcpt_list, node) {

237 address *rcpt = (address *) (node->data);

238 spool_write_rcpt(out, rcpt);

239 }

240 DEBUG(6) debugf("after RT\n");

241 fprintf(out, "PR:%s\n", prot_names[msg->received_prot]);

242 if (msg->received_host != NULL)

243 fprintf(out, "RH:%s\n", msg->received_host);

244

245 if (msg->ident != NULL)

246 fprintf(out, "ID:%s\n", msg->ident);

247

248 if (msg->data_size >= 0)

249 fprintf(out, "DS: %d\n", msg->data_size);

250

251 if (msg->received_time > 0)

252 fprintf(out, "TR: %u\n", (int) (msg->received_time));

253

254 if (msg->warned_time > 0)

255 fprintf(out, "TW: %u\n", (int) (msg->warned_time));

256

257 DEBUG(6) debugf("after RH\n");

258 fprintf(out, "\n");

259

260 foreach(msg->hdr_list, node) {

261 header *hdr = (header *) (node->data);

262 fprintf(out, "HD:%s", hdr->header);

263 }

264 if (fflush(out) == EOF)

265 ok = FALSE;

266 else if (fdatasync(fileno(out)) != 0) {

267 if (errno != EINVAL) /* some fs do not support this.. I hope this also means that it is not necessary */

268 ok = FALSE;

269 }

270 fclose(out);

271 if (ok) {

272 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);

273 DEBUG(4) debugf("spool_file = %s\n", spool_file);

274 ok = (rename(tmp_file, spool_file) != -1);

275 g_free(spool_file);

276 }

277 } else {

278 logwrite(LOG_ALERT, "could not open temporary header spool file '%s': %s\n", tmp_file, strerror(errno));

279 DEBUG(1) debugf("euid = %d, egid = %d\n", geteuid(), getegid());

280 ok = FALSE;

281 }

282

283 g_free(tmp_file);

284

285 return ok;

286 }

287

288 gboolean

289 spool_write(message * msg, gboolean do_write_data)

290 {

291 GList *list;

292 gchar *spool_file, *tmp_file;

293 FILE *out;

294 gboolean ok = TRUE;

295 uid_t saved_uid, saved_gid;

296 /* user can read/write, group can read, others cannot do anything: */

297 mode_t saved_mode = saved_mode = umask(026);

298

299 /* set uid and gid to the mail ids */

300 if (!conf.run_as_user) {

301 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

302 }

303

304 /* header spool: */

305 ok = spool_write_header(msg);

306

307 if (ok) {

308

309 if (do_write_data) {

310 /* data spool: */

311 tmp_file = g_strdup_printf("%s/input/%d-D.tmp", conf.spool_dir, getpid());

312 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);

313

314 if ((out = fopen(tmp_file, "w"))) {

315 fprintf(out, "%s\n", msg->uid);

316 for (list = g_list_first(msg->data_list); list != NULL; list = g_list_next(list)) {

317 fprintf(out, "%s", (gchar *) (list->data));

318 }

319

320 /* possibly paranoid ;-) */

321 if (fflush(out) == EOF)

322 ok = FALSE;

323 else if (fdatasync(fileno(out)) != 0) {

324 if (errno != EINVAL) /* some fs do not support this.. I hope this also means that it is not necessary */

325 ok = FALSE;

326 }

327 fclose(out);

328 if (ok) {

329 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);

330 DEBUG(4) debugf("spool_file = %s\n", spool_file);

331 ok = (rename(tmp_file, spool_file) != -1);

332 g_free(spool_file);

333 }

334 } else {

335 logwrite(LOG_ALERT, "could not open temporary data spool file: %s\n", strerror(errno));

336 ok = FALSE;

337 }

338 g_free(tmp_file);

339 }

340 }

341

342 /* set uid and gid back */

343 if (!conf.run_as_user) {

344 set_euidgid(saved_uid, saved_gid, NULL, NULL);

345 }

346

347 umask(saved_mode);

348

349 return ok;

350 }

351

352 #define MAX_LOCKAGE 300

353

354 gboolean

355 spool_lock(gchar * uid)

356 {

357 uid_t saved_uid, saved_gid;

358 gchar *hitch_name;

359 gchar *lock_name;

360 gboolean ok = FALSE;

361

362 hitch_name = g_strdup_printf("%s/%s-%d.lock", conf.lock_dir, uid, getpid());

363 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);

364

365 /* set uid and gid to the mail ids */

366 if (!conf.run_as_user) {

367 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

368 }

369

370 ok = dot_lock(lock_name, hitch_name);

371 if (!ok)

372 logwrite(LOG_WARNING, "spool file %s is locked\n", uid);

373

374 /* set uid and gid back */

375 if (!conf.run_as_user) {

376 set_euidgid(saved_uid, saved_gid, NULL, NULL);

377 }

378

379 g_free(lock_name);

380 g_free(hitch_name);

381

382 return ok;

383 }

384

385 gboolean

386 spool_unlock(gchar * uid)

387 {

388 uid_t saved_uid, saved_gid;

389 gchar *lock_name;

390

391 /* set uid and gid to the mail ids */

392 if (!conf.run_as_user) {

393 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

394 }

395

396 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);

397 dot_unlock(lock_name);

398 g_free(lock_name);

399

400 /* set uid and gid back */

401 if (!conf.run_as_user) {

402 set_euidgid(saved_uid, saved_gid, NULL, NULL);

403 }

404 return TRUE;

405 }

406

407 gboolean

408 spool_delete_all(message * msg)

409 {

410 uid_t saved_uid, saved_gid;

411 gchar *spool_file;

412

413 /* set uid and gid to the mail ids */

414 if (!conf.run_as_user) {

415 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);

416 }

417

418 /* header spool: */

419 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);

420 if (unlink(spool_file) != 0)

421 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));

422 g_free(spool_file);

423

424 /* data spool: */

425 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);

426 if (unlink(spool_file) != 0)

427 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));

428 g_free(spool_file);

429

430 /* set uid and gid back */

431 if (!conf.run_as_user) {

432 set_euidgid(saved_uid, saved_gid, NULL, NULL);

433 }

434 return TRUE;

435 }