masqmail-0.2: 8c55886cacd8 src/spool.c

masqmail-0.2

view src/spool.c @ 3:8c55886cacd8

man pages will be maintained in troff now

author	meillo@marmaro.de
date	Fri, 26 Sep 2008 21:40:10 +0200
parents
children	26e34ae9a3e3

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

24 gint 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) { return 0; }

31 buf[p++] = c;

32 }

34 if(c == EOF){

35 return -1;

36 }

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

38 p--;

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

40 buf[p] = 0;

42 return p;

43 }

45 static

46 void spool_write_rcpt(FILE *out, address *rcpt)

47 {

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

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

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

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

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

54 logwrite(LOG_WARNING, "BUG: null domain for address %s, setting to %s\n",

55 rcpt->local_part, conf.host_name);

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

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

58 }

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

60 }else{

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

62 }

63 }

65 static

66 address *spool_scan_rcpt(gchar *line)

67 {

68 address *rcpt = NULL;

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

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

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

73 }else{

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

75 }

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

77 addr_mark_delivered(rcpt);

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

79 addr_mark_failed(rcpt);

80 }

81 }

82 return rcpt;

83 }

85 gboolean spool_read_data(message *msg)

86 {

87 FILE *in;

88 gboolean ok = FALSE;

89 gchar *spool_file;

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

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

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

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

95 char buf[MAX_DATALINE];

96 int len;

98 /* msg uid */

99 read_line(in, buf, MAX_DATALINE);

100

101 /* data */

102 msg->data_list = NULL;

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

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

105 }

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

107 fclose(in);

108 ok = TRUE;

109 }else

110 logwrite(LOG_ALERT, "could not open spool data file %s: %s\n",

111 spool_file, strerror(errno));

112 return ok;

113 }

114

115 gboolean spool_read_header(message *msg)

116 {

117 FILE *in;

118 gboolean ok = FALSE;

119 gchar *spool_file;

120

121 /* header spool: */

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

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

124 header *hdr = NULL;

125 char buf[MAX_DATALINE];

126 int len;

127

128 /* msg uid */

129 read_line(in, buf, MAX_DATALINE);

130

131 /* envelope header */

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

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

134 break;

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

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

137 DEBUG(3) debugf("spool_read: MAIL FROM: %s",

138 msg->return_path->address);

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

140 address *addr;

141 addr = spool_scan_rcpt(buf);

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

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

144 }else{

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

146 }

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

148 prot_id i;

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

150 if(strncasecmp(prot_names[i], &(buf[3]),

151 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",

189 spool_file, strerror(errno));

190 return ok;

191 }

192

193 message *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

214 gboolean 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) ok = FALSE;

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

266 if(errno != EINVAL) /* some fs do not support this..

267 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 spool_write(message *msg, gboolean do_write_data)

289 {

290 GList *list;

291 gchar *spool_file, *tmp_file;

292 FILE *out;

293 gboolean ok = TRUE;

294 uid_t saved_uid, saved_gid;

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

296 mode_t saved_mode = saved_mode = umask(026);

297

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

299 if(!conf.run_as_user){

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

301 }

302

303 /* header spool: */

304 ok = spool_write_header(msg);

305

306 if(ok){

307

308 if(do_write_data){

309 /* data spool: */

310 tmp_file = g_strdup_printf("%s/input/%d-D.tmp",

311 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);

317 list != NULL;

318 list = g_list_next(list)){

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

320 }

321

322 /* possibly paranoid ;-) */

323 if(fflush(out) == EOF) ok = FALSE;

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

325 if(errno != EINVAL) /* some fs do not support this..

326 I hope this also means that it is not necessary */

327 ok = FALSE;

328 }

329 fclose(out);

330 if(ok){

331 spool_file = g_strdup_printf("%s/input/%s-D",

332 conf.spool_dir, msg->uid);

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

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

335 g_free(spool_file);

336 }

337 }else{

338 logwrite(LOG_ALERT, "could not open temporary data spool file: %s\n",

339 strerror(errno));

340 ok = FALSE;

341 }

342 g_free(tmp_file);

343 }

344 }

345

346 /* set uid and gid back */

347 if(!conf.run_as_user){

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

349 }

350

351 umask(saved_mode);

352

353 return ok;

354 }

355

356 #define MAX_LOCKAGE 300

357

358 gboolean spool_lock(gchar *uid)

359 {

360 uid_t saved_uid, saved_gid;

361 gchar *hitch_name;

362 gchar *lock_name;

363 gboolean ok = FALSE;

364

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

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

367

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

369 if(!conf.run_as_user){

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

371 }

372

373 ok = dot_lock(lock_name, hitch_name);

374 if(!ok) logwrite(LOG_WARNING, "spool file %s is locked\n", uid);

375

376 /* set uid and gid back */

377 if(!conf.run_as_user){

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

379 }

380

381 g_free(lock_name);

382 g_free(hitch_name);

383

384 return ok;

385 }

386

387 gboolean spool_unlock(gchar *uid)

388 {

389 uid_t saved_uid, saved_gid;

390 gchar *lock_name;

391

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

393 if(!conf.run_as_user){

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

395 }

396

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

398 dot_unlock(lock_name);

399 g_free(lock_name);

400

401 /* set uid and gid back */

402 if(!conf.run_as_user){

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

404 }

405 return TRUE;

406 }

407

408 gboolean 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",

422 spool_file, strerror(errno));

423 g_free(spool_file);

424

425 /* data spool: */

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

427 if(unlink(spool_file) != 0)

428 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n",

429 spool_file, strerror(errno));

430 g_free(spool_file);

431

432 /* set uid and gid back */

433 if(!conf.run_as_user){

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

435 }

436 return TRUE;

437 }