masqmail

annotate src/spool.c @ 80:e5090ac234cf

find changesets by author, revision, files, or words in the commit message
refactoring plus one small bugfix replaced deep nested conditionals with early exits fixed a small bug in the same go (Note: it is bad to fix bugs during refactoring): The SMTP_HELO case did not break in case of error. Now it does.
author meillo@marmaro.de
date Sat, 19 Jun 2010 11:11:28 +0200
parents 257a9e6d1a8e
children 83a182793503
rev   line source
meillo@0 1 /* MasqMail
meillo@0 2 Copyright (C) 1999-2001 Oliver Kurth
meillo@76 3 Copyright (C) 2010 markus schnalke <meillo@marmaro.de>
meillo@0 4
meillo@0 5 This program is free software; you can redistribute it and/or modify
meillo@0 6 it under the terms of the GNU General Public License as published by
meillo@0 7 the Free Software Foundation; either version 2 of the License, or
meillo@0 8 (at your option) any later version.
meillo@0 9
meillo@0 10 This program is distributed in the hope that it will be useful,
meillo@0 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
meillo@0 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
meillo@0 13 GNU General Public License for more details.
meillo@0 14
meillo@0 15 You should have received a copy of the GNU General Public License
meillo@0 16 along with this program; if not, write to the Free Software
meillo@0 17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
meillo@0 18 */
meillo@0 19
meillo@15 20 #include <sys/stat.h>
meillo@15 21
meillo@0 22 #include "masqmail.h"
meillo@0 23 #include "dotlock.h"
meillo@0 24
meillo@10 25 static gint
meillo@10 26 read_line(FILE * in, gchar * buf, gint buf_len)
meillo@0 27 {
meillo@10 28 gint p = 0;
meillo@10 29 gint c;
meillo@0 30
meillo@10 31 while ((c = getc(in)) != '\n' && (c != EOF)) {
meillo@10 32 if (p >= buf_len - 1) {
meillo@75 33 buf[buf_len-1] = '\0';
meillo@75 34 ungetc(c, in);
meillo@75 35 return buf_len;
meillo@10 36 }
meillo@10 37 buf[p++] = c;
meillo@10 38 }
meillo@0 39
meillo@10 40 if (c == EOF) {
meillo@10 41 return -1;
meillo@10 42 }
meillo@10 43 if ((p > 0) && (buf[p - 1] == '\r'))
meillo@10 44 p--;
meillo@10 45 buf[p++] = '\n';
meillo@15 46 buf[p] = '\0';
meillo@0 47
meillo@10 48 return p;
meillo@0 49 }
meillo@0 50
meillo@10 51 static void
meillo@10 52 spool_write_rcpt(FILE * out, address * rcpt)
meillo@0 53 {
meillo@10 54 gchar dlvrd_char = addr_is_delivered(rcpt) ? 'X' : (addr_is_failed(rcpt) ? 'F' : ' ');
meillo@0 55
meillo@10 56 if (rcpt->local_part[0] != '|') {
meillo@10 57 /* this is a paranoid check, in case it slipped through: */
meillo@10 58 /* if this happens, it is a bug */
meillo@10 59 if (rcpt->domain == NULL) {
meillo@10 60 logwrite(LOG_WARNING, "BUG: null domain for address %s, setting to %s\n", rcpt->local_part, conf.host_name);
meillo@10 61 logwrite(LOG_WARNING, "please report this bug.\n");
meillo@10 62 rcpt->domain = g_strdup(conf.host_name);
meillo@10 63 }
meillo@10 64 fprintf(out, "RT:%c%s\n", dlvrd_char, addr_string(rcpt));
meillo@10 65 } else {
meillo@10 66 fprintf(out, "RT:%c%s\n", dlvrd_char, rcpt->local_part);
meillo@10 67 }
meillo@0 68 }
meillo@0 69
meillo@10 70 static address*
meillo@10 71 spool_scan_rcpt(gchar * line)
meillo@0 72 {
meillo@10 73 address *rcpt = NULL;
meillo@0 74
meillo@15 75 if (line[3] != '\0') {
meillo@10 76 if (line[4] != '|') {
meillo@10 77 rcpt = create_address(&(line[4]), TRUE);
meillo@10 78 } else {
meillo@10 79 rcpt = create_address_pipe(&(line[4]));
meillo@10 80 }
meillo@10 81 if (line[3] == 'X') {
meillo@10 82 addr_mark_delivered(rcpt);
meillo@10 83 } else if (line[3] == 'F') {
meillo@10 84 addr_mark_failed(rcpt);
meillo@10 85 }
meillo@10 86 }
meillo@10 87 return rcpt;
meillo@0 88 }
meillo@0 89
meillo@10 90 gboolean
meillo@10 91 spool_read_data(message * msg)
meillo@0 92 {
meillo@10 93 FILE *in;
meillo@10 94 gboolean ok = FALSE;
meillo@10 95 gchar *spool_file;
meillo@0 96
meillo@10 97 DEBUG(5) debugf("spool_read_data entered\n");
meillo@10 98 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
meillo@10 99 DEBUG(5) debugf("reading data spool file '%s'\n", spool_file);
meillo@10 100 if ((in = fopen(spool_file, "r"))) {
meillo@10 101 char buf[MAX_DATALINE];
meillo@10 102 int len;
meillo@10 103
meillo@10 104 /* msg uid */
meillo@10 105 read_line(in, buf, MAX_DATALINE);
meillo@10 106
meillo@10 107 /* data */
meillo@10 108 msg->data_list = NULL;
meillo@10 109 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {
meillo@10 110 msg->data_list = g_list_prepend(msg->data_list, g_strdup(buf));
meillo@10 111 }
meillo@10 112 msg->data_list = g_list_reverse(msg->data_list);
meillo@10 113 fclose(in);
meillo@10 114 ok = TRUE;
meillo@10 115 } else
meillo@10 116 logwrite(LOG_ALERT, "could not open spool data file %s: %s\n", spool_file, strerror(errno));
meillo@10 117 return ok;
meillo@0 118 }
meillo@0 119
meillo@10 120 gboolean
meillo@10 121 spool_read_header(message * msg)
meillo@0 122 {
meillo@10 123 FILE *in;
meillo@10 124 gboolean ok = FALSE;
meillo@10 125 gchar *spool_file;
meillo@0 126
meillo@10 127 /* header spool: */
meillo@10 128 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
meillo@10 129 if ((in = fopen(spool_file, "r"))) {
meillo@10 130 header *hdr = NULL;
meillo@10 131 char buf[MAX_DATALINE];
meillo@10 132 int len;
meillo@0 133
meillo@10 134 /* msg uid */
meillo@10 135 read_line(in, buf, MAX_DATALINE);
meillo@10 136
meillo@10 137 /* envelope header */
meillo@10 138 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {
meillo@10 139 if (buf[0] == '\n')
meillo@10 140 break;
meillo@10 141 else if (strncasecmp(buf, "MF:", 3) == 0) {
meillo@10 142 msg->return_path = create_address(&(buf[3]), TRUE);
meillo@10 143 DEBUG(3) debugf("spool_read: MAIL FROM: %s", msg->return_path->address);
meillo@10 144 } else if (strncasecmp(buf, "RT:", 3) == 0) {
meillo@10 145 address *addr;
meillo@10 146 addr = spool_scan_rcpt(buf);
meillo@10 147 if (!addr_is_delivered(addr) && !addr_is_failed(addr)) {
meillo@10 148 msg->rcpt_list = g_list_append(msg->rcpt_list, addr);
meillo@10 149 } else {
meillo@10 150 msg->non_rcpt_list = g_list_append(msg->non_rcpt_list, addr);
meillo@10 151 }
meillo@10 152 } else if (strncasecmp(buf, "PR:", 3) == 0) {
meillo@10 153 prot_id i;
meillo@10 154 for (i = 0; i < PROT_NUM; i++) {
meillo@10 155 if (strncasecmp(prot_names[i], &(buf[3]), strlen(prot_names[i])) == 0) {
meillo@10 156 break;
meillo@10 157 }
meillo@10 158 }
meillo@10 159 msg->received_prot = i;
meillo@10 160 } else if (strncasecmp(buf, "RH:", 3) == 0) {
meillo@10 161 g_strchomp(buf);
meillo@10 162 msg->received_host = g_strdup(&(buf[3]));
meillo@10 163 } else if (strncasecmp(buf, "ID:", 3) == 0) {
meillo@10 164 g_strchomp(buf);
meillo@10 165 msg->ident = g_strdup(&(buf[3]));
meillo@10 166 } else if (strncasecmp(buf, "DS:", 3) == 0) {
meillo@10 167 msg->data_size = atoi(&(buf[3]));
meillo@10 168 } else if (strncasecmp(buf, "TR:", 3) == 0) {
meillo@10 169 msg->received_time = (time_t) (atoi(&(buf[3])));
meillo@10 170 } else if (strncasecmp(buf, "TW:", 3) == 0) {
meillo@10 171 msg->warned_time = (time_t) (atoi(&(buf[3])));
meillo@10 172 }
meillo@10 173 /* so far ignore other tags */
meillo@10 174 }
meillo@10 175
meillo@10 176 /* mail headers */
meillo@10 177 while ((len = read_line(in, buf, MAX_DATALINE)) > 0) {
meillo@10 178 if (strncasecmp(buf, "HD:", 3) == 0) {
meillo@10 179 hdr = get_header(&(buf[3]));
meillo@10 180 msg->hdr_list = g_list_append(msg->hdr_list, hdr);
meillo@10 181 } else if ((buf[0] == ' ' || buf[0] == '\t') && hdr) {
meillo@10 182 char *tmp = hdr->header;
meillo@10 183 /* header continuation */
meillo@10 184 hdr->header = g_strconcat(hdr->header, buf, NULL);
meillo@10 185 hdr->value = hdr->header + (hdr->value - tmp);
meillo@10 186 } else
meillo@10 187 break;
meillo@10 188 }
meillo@10 189 fclose(in);
meillo@10 190 ok = TRUE;
meillo@10 191 } else
meillo@10 192 logwrite(LOG_ALERT, "could not open spool header file %s: %s\n", spool_file, strerror(errno));
meillo@10 193 return ok;
meillo@0 194 }
meillo@0 195
meillo@10 196 message*
meillo@10 197 msg_spool_read(gchar * uid, gboolean do_readdata)
meillo@0 198 {
meillo@10 199 message *msg;
meillo@10 200 gboolean ok = FALSE;
meillo@0 201
meillo@10 202 msg = create_message();
meillo@10 203 msg->uid = g_strdup(uid);
meillo@10 204
meillo@10 205 /* header spool: */
meillo@10 206 ok = spool_read_header(msg);
meillo@10 207 if (ok && do_readdata) {
meillo@10 208 /* data spool: */
meillo@10 209 ok = spool_read_data(msg);
meillo@10 210 }
meillo@10 211 return msg;
meillo@0 212 }
meillo@0 213
meillo@0 214 /* write header. uid and gid should already be set to the
meillo@0 215 mail ids. Better call spool_write(msg, FALSE).
meillo@0 216 */
meillo@10 217 static gboolean
meillo@10 218 spool_write_header(message * msg)
meillo@0 219 {
meillo@10 220 GList *node;
meillo@10 221 gchar *spool_file, *tmp_file;
meillo@10 222 FILE *out;
meillo@10 223 gboolean ok = TRUE;
meillo@0 224
meillo@10 225 /* header spool: */
meillo@10 226 tmp_file = g_strdup_printf("%s/input/%d-H.tmp", conf.spool_dir, getpid());
meillo@10 227 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);
meillo@0 228
meillo@10 229 if ((out = fopen(tmp_file, "w"))) {
meillo@10 230 DEBUG(6) debugf("opened tmp_file %s\n", tmp_file);
meillo@0 231
meillo@10 232 fprintf(out, "%s\n", msg->uid);
meillo@10 233 fprintf(out, "MF:%s\n", addr_string(msg->return_path));
meillo@0 234
meillo@10 235 DEBUG(6) debugf("after MF\n");
meillo@10 236 foreach(msg->rcpt_list, node) {
meillo@10 237 address *rcpt = (address *) (node->data);
meillo@10 238 spool_write_rcpt(out, rcpt);
meillo@10 239 }
meillo@10 240 foreach(msg->non_rcpt_list, node) {
meillo@10 241 address *rcpt = (address *) (node->data);
meillo@10 242 spool_write_rcpt(out, rcpt);
meillo@10 243 }
meillo@10 244 DEBUG(6) debugf("after RT\n");
meillo@10 245 fprintf(out, "PR:%s\n", prot_names[msg->received_prot]);
meillo@10 246 if (msg->received_host != NULL)
meillo@10 247 fprintf(out, "RH:%s\n", msg->received_host);
meillo@0 248
meillo@10 249 if (msg->ident != NULL)
meillo@10 250 fprintf(out, "ID:%s\n", msg->ident);
meillo@0 251
meillo@10 252 if (msg->data_size >= 0)
meillo@10 253 fprintf(out, "DS: %d\n", msg->data_size);
meillo@0 254
meillo@10 255 if (msg->received_time > 0)
meillo@10 256 fprintf(out, "TR: %u\n", (int) (msg->received_time));
meillo@0 257
meillo@10 258 if (msg->warned_time > 0)
meillo@10 259 fprintf(out, "TW: %u\n", (int) (msg->warned_time));
meillo@0 260
meillo@10 261 DEBUG(6) debugf("after RH\n");
meillo@10 262 fprintf(out, "\n");
meillo@0 263
meillo@10 264 foreach(msg->hdr_list, node) {
meillo@10 265 header *hdr = (header *) (node->data);
meillo@10 266 fprintf(out, "HD:%s", hdr->header);
meillo@10 267 }
meillo@10 268 if (fflush(out) == EOF)
meillo@10 269 ok = FALSE;
meillo@10 270 else if (fdatasync(fileno(out)) != 0) {
meillo@10 271 if (errno != EINVAL) /* some fs do not support this.. I hope this also means that it is not necessary */
meillo@10 272 ok = FALSE;
meillo@10 273 }
meillo@10 274 fclose(out);
meillo@10 275 if (ok) {
meillo@10 276 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
meillo@10 277 DEBUG(4) debugf("spool_file = %s\n", spool_file);
meillo@10 278 ok = (rename(tmp_file, spool_file) != -1);
meillo@10 279 g_free(spool_file);
meillo@10 280 }
meillo@10 281 } else {
meillo@10 282 logwrite(LOG_ALERT, "could not open temporary header spool file '%s': %s\n", tmp_file, strerror(errno));
meillo@10 283 DEBUG(1) debugf("euid = %d, egid = %d\n", geteuid(), getegid());
meillo@10 284 ok = FALSE;
meillo@10 285 }
meillo@0 286
meillo@10 287 g_free(tmp_file);
meillo@0 288
meillo@10 289 return ok;
meillo@0 290 }
meillo@0 291
meillo@10 292 gboolean
meillo@10 293 spool_write(message * msg, gboolean do_write_data)
meillo@0 294 {
meillo@10 295 GList *list;
meillo@10 296 gchar *spool_file, *tmp_file;
meillo@10 297 FILE *out;
meillo@10 298 gboolean ok = TRUE;
meillo@10 299 uid_t saved_uid, saved_gid;
meillo@10 300 /* user can read/write, group can read, others cannot do anything: */
meillo@10 301 mode_t saved_mode = saved_mode = umask(026);
meillo@0 302
meillo@10 303 /* set uid and gid to the mail ids */
meillo@10 304 if (!conf.run_as_user) {
meillo@10 305 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@0 306 }
meillo@0 307
meillo@10 308 /* header spool: */
meillo@10 309 ok = spool_write_header(msg);
meillo@10 310
meillo@10 311 if (ok) {
meillo@10 312
meillo@10 313 if (do_write_data) {
meillo@10 314 /* data spool: */
meillo@10 315 tmp_file = g_strdup_printf("%s/input/%d-D.tmp", conf.spool_dir, getpid());
meillo@10 316 DEBUG(4) debugf("tmp_file = %s\n", tmp_file);
meillo@10 317
meillo@10 318 if ((out = fopen(tmp_file, "w"))) {
meillo@10 319 fprintf(out, "%s\n", msg->uid);
meillo@10 320 for (list = g_list_first(msg->data_list); list != NULL; list = g_list_next(list)) {
meillo@10 321 fprintf(out, "%s", (gchar *) (list->data));
meillo@10 322 }
meillo@10 323
meillo@10 324 /* possibly paranoid ;-) */
meillo@10 325 if (fflush(out) == EOF)
meillo@10 326 ok = FALSE;
meillo@10 327 else if (fdatasync(fileno(out)) != 0) {
meillo@10 328 if (errno != EINVAL) /* some fs do not support this.. I hope this also means that it is not necessary */
meillo@10 329 ok = FALSE;
meillo@10 330 }
meillo@10 331 fclose(out);
meillo@10 332 if (ok) {
meillo@10 333 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
meillo@10 334 DEBUG(4) debugf("spool_file = %s\n", spool_file);
meillo@10 335 ok = (rename(tmp_file, spool_file) != -1);
meillo@10 336 g_free(spool_file);
meillo@10 337 }
meillo@10 338 } else {
meillo@10 339 logwrite(LOG_ALERT, "could not open temporary data spool file: %s\n", strerror(errno));
meillo@10 340 ok = FALSE;
meillo@10 341 }
meillo@10 342 g_free(tmp_file);
meillo@10 343 }
meillo@0 344 }
meillo@10 345
meillo@10 346 /* set uid and gid back */
meillo@10 347 if (!conf.run_as_user) {
meillo@10 348 set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@0 349 }
meillo@0 350
meillo@10 351 umask(saved_mode);
meillo@0 352
meillo@10 353 return ok;
meillo@0 354 }
meillo@0 355
meillo@0 356 #define MAX_LOCKAGE 300
meillo@0 357
meillo@10 358 gboolean
meillo@10 359 spool_lock(gchar * uid)
meillo@0 360 {
meillo@10 361 uid_t saved_uid, saved_gid;
meillo@10 362 gchar *hitch_name;
meillo@10 363 gchar *lock_name;
meillo@10 364 gboolean ok = FALSE;
meillo@0 365
meillo@10 366 hitch_name = g_strdup_printf("%s/%s-%d.lock", conf.lock_dir, uid, getpid());
meillo@10 367 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);
meillo@0 368
meillo@10 369 /* set uid and gid to the mail ids */
meillo@10 370 if (!conf.run_as_user) {
meillo@10 371 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@10 372 }
meillo@0 373
meillo@10 374 ok = dot_lock(lock_name, hitch_name);
meillo@10 375 if (!ok)
meillo@10 376 logwrite(LOG_WARNING, "spool file %s is locked\n", uid);
meillo@0 377
meillo@10 378 /* set uid and gid back */
meillo@10 379 if (!conf.run_as_user) {
meillo@10 380 set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@10 381 }
meillo@0 382
meillo@10 383 g_free(lock_name);
meillo@10 384 g_free(hitch_name);
meillo@0 385
meillo@10 386 return ok;
meillo@0 387 }
meillo@0 388
meillo@10 389 gboolean
meillo@10 390 spool_unlock(gchar * uid)
meillo@0 391 {
meillo@10 392 uid_t saved_uid, saved_gid;
meillo@10 393 gchar *lock_name;
meillo@0 394
meillo@10 395 /* set uid and gid to the mail ids */
meillo@10 396 if (!conf.run_as_user) {
meillo@10 397 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@10 398 }
meillo@0 399
meillo@10 400 lock_name = g_strdup_printf("%s/%s.lock", conf.lock_dir, uid);
meillo@10 401 dot_unlock(lock_name);
meillo@10 402 g_free(lock_name);
meillo@0 403
meillo@10 404 /* set uid and gid back */
meillo@10 405 if (!conf.run_as_user) {
meillo@10 406 set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@10 407 }
meillo@10 408 return TRUE;
meillo@0 409 }
meillo@0 410
meillo@10 411 gboolean
meillo@10 412 spool_delete_all(message * msg)
meillo@0 413 {
meillo@10 414 uid_t saved_uid, saved_gid;
meillo@10 415 gchar *spool_file;
meillo@0 416
meillo@10 417 /* set uid and gid to the mail ids */
meillo@10 418 if (!conf.run_as_user) {
meillo@10 419 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
meillo@10 420 }
meillo@0 421
meillo@10 422 /* header spool: */
meillo@10 423 spool_file = g_strdup_printf("%s/input/%s-H", conf.spool_dir, msg->uid);
meillo@10 424 if (unlink(spool_file) != 0)
meillo@10 425 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));
meillo@10 426 g_free(spool_file);
meillo@0 427
meillo@10 428 /* data spool: */
meillo@10 429 spool_file = g_strdup_printf("%s/input/%s-D", conf.spool_dir, msg->uid);
meillo@10 430 if (unlink(spool_file) != 0)
meillo@10 431 logwrite(LOG_ALERT, "could not delete spool file %s: %s\n", spool_file, strerror(errno));
meillo@10 432 g_free(spool_file);
meillo@0 433
meillo@10 434 /* set uid and gid back */
meillo@10 435 if (!conf.run_as_user) {
meillo@10 436 set_euidgid(saved_uid, saved_gid, NULL, NULL);
meillo@10 437 }
meillo@10 438 return TRUE;
meillo@0 439 }