vcs.maemo.org Git - monky/blob - src/mail.c

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  13  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  14  *      (see AUTHORS)
  15  * All rights reserved.
  16  *
  17  * This program is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation, either version 3 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28  *
  29  */
  30
  31 #include "config.h"
  32 #include "conky.h"
  33 #include "common.h"
  34 #include "logging.h"
  35 #include "mail.h"
  36
  37 #include <errno.h>
  38 #include <stdio.h>
  39 #include <string.h>
  40 #include <unistd.h>
  41 #include <limits.h>
  42 #include <netinet/in.h>
  43 #include <netdb.h>
  44 #include <sys/socket.h>
  45 #include <sys/stat.h>
  46 #include <sys/time.h>
  47 #include <sys/param.h>
  48
  49 #include <dirent.h>
  50 #include <errno.h>
  51 #include <termios.h>
  52
  53 /* MAX() is defined by a header included from conky.h
  54  * maybe once this is not true anymore, so have an alternative
  55  * waiting to drop in.
  56  *
  57  * #define MAX(a, b)  ((a > b) ? a : b)
  58  */
  59
  60 char *current_mail_spool;
  61
  62 void update_mail_count(struct local_mail_s *mail)
  63 {
  64         struct stat st;
  65
  66         if (mail == NULL) {
  67                 return;
  68         }
  69
  70         /* TODO: use that fine file modification notify on Linux 2.4 */
  71
  72         /* don't check mail so often (9.5s is minimum interval) */
  73         if (current_update_time - mail->last_update < 9.5) {
  74                 return;
  75         } else {
  76                 mail->last_update = current_update_time;
  77         }
  78
  79         if (stat(mail->mbox, &st)) {
  80                 static int rep = 0;
  81
  82                 if (!rep) {
  83                         NORM_ERR("can't stat %s: %s", mail->mbox, strerror(errno));
  84                         rep = 1;
  85                 }
  86                 return;
  87         }
  88 #if HAVE_DIRENT_H
  89         /* maildir format */
  90         if (S_ISDIR(st.st_mode)) {
  91                 DIR *dir;
  92                 char *dirname;
  93                 struct dirent *dirent;
  94                 char *mailflags;
  95
  96                 mail->mail_count = mail->new_mail_count = 0;
  97                 mail->seen_mail_count = mail->unseen_mail_count = 0;
  98                 mail->flagged_mail_count = mail->unflagged_mail_count = 0;
  99                 mail->forwarded_mail_count = mail->unforwarded_mail_count = 0;
 100                 mail->replied_mail_count = mail->unreplied_mail_count = 0;
 101                 mail->draft_mail_count = mail->trashed_mail_count = 0;
 102                 dirname = (char *) malloc(sizeof(char) * (strlen(mail->mbox) + 5));
 103                 if (!dirname) {
 104                         NORM_ERR("malloc");
 105                         return;
 106                 }
 107                 strcpy(dirname, mail->mbox);
 108                 strcat(dirname, "/");
 109                 /* checking the cur subdirectory */
 110                 strcat(dirname, "cur");
 111
 112                 dir = opendir(dirname);
 113                 if (!dir) {
 114                         NORM_ERR("cannot open directory");
 115                         free(dirname);
 116                         return;
 117                 }
 118                 dirent = readdir(dir);
 119                 while (dirent) {
 120                         /* . and .. are skipped */
 121                         if (dirent->d_name[0] != '.') {
 122                                 mail->mail_count++;
 123                                 mailflags = (char *) malloc(sizeof(char) * strlen(strrchr(dirent->d_name, ',')));
 124                                 if (!mailflags) {
 125                                         NORM_ERR("malloc");
 126                                         free(dirname);
 127                                         return;
 128                                 }
 129                                 strcpy(mailflags, strrchr(dirent->d_name, ','));
 130                                 if (!strchr(mailflags, 'T')) { /* The message is not in the trash */
 131                                         if (strchr(mailflags, 'S')) { /*The message has been seen */
 132                                                 mail->seen_mail_count++;
 133                                         } else {
 134                                                 mail->unseen_mail_count++;
 135                                         }
 136                                         if (strchr(mailflags, 'F')) { /*The message was flagged */
 137                                                 mail->flagged_mail_count++;
 138                                         } else {
 139                                                 mail->unflagged_mail_count++;
 140                                         }
 141                                         if (strchr(mailflags, 'P')) { /*The message was forwarded */
 142                                                 mail->forwarded_mail_count++;
 143                                         } else {
 144                                                 mail->unforwarded_mail_count++;
 145                                         }
 146                                         if (strchr(mailflags, 'R')) { /*The message was replied */
 147                                                 mail->replied_mail_count++;
 148                                         } else {
 149                                                 mail->unreplied_mail_count++;
 150                                         }
 151                                         if (strchr(mailflags, 'D')) { /*The message is a draft */
 152                                                 mail->draft_mail_count++;
 153                                         }
 154                                 } else {
 155                                         mail->trashed_mail_count++;
 156                                 }
 157                                 free(mailflags);
 158                         }
 159                         dirent = readdir(dir);
 160                 }
 161                 closedir(dir);
 162
 163                 dirname[strlen(dirname) - 3] = '\0';
 164                 strcat(dirname, "new");
 165
 166                 dir = opendir(dirname);
 167                 if (!dir) {
 168                         NORM_ERR("cannot open directory");
 169                         free(dirname);
 170                         return;
 171                 }
 172                 dirent = readdir(dir);
 173                 while (dirent) {
 174                         /* . and .. are skipped */
 175                         if (dirent->d_name[0] != '.') {
 176                                 mail->new_mail_count++;
 177                                 mail->mail_count++;
 178                                 mail->unseen_mail_count++;  /* new messages cannot have been seen */
 179                         }
 180                         dirent = readdir(dir);
 181                 }
 182                 closedir(dir);
 183
 184                 free(dirname);
 185                 return;
 186         }
 187 #endif
 188         /* mbox format */
 189         if (st.st_mtime != mail->last_mtime) {
 190                 /* yippee, modification time has changed, let's read mail count! */
 191                 static int rep;
 192                 FILE *fp;
 193                 int reading_status = 0;
 194
 195                 /* could lock here but I don't think it's really worth it because
 196                  * this isn't going to write mail spool */
 197
 198                 mail->new_mail_count = mail->mail_count = 0;
 199
 200                 /* these flags are not supported for mbox */
 201                 mail->seen_mail_count = mail->unseen_mail_count = -1;
 202                 mail->flagged_mail_count = mail->unflagged_mail_count = -1;
 203                 mail->forwarded_mail_count = mail->unforwarded_mail_count = -1;
 204                 mail->replied_mail_count = mail->unreplied_mail_count = -1;
 205                 mail->draft_mail_count = mail->trashed_mail_count = -1;
 206
 207                 fp = open_file(mail->mbox, &rep);
 208                 if (!fp) {
 209                         return;
 210                 }
 211
 212                 /* NOTE: adds mail as new if there isn't Status-field at all */
 213
 214                 while (!feof(fp)) {
 215                         char buf[128];
 216                         int was_new = 0;
 217
 218                         if (fgets(buf, 128, fp) == NULL) {
 219                                 break;
 220                         }
 221
 222                         if (strncmp(buf, "From ", 5) == 0) {
 223                                 /* ignore MAILER-DAEMON */
 224                                 if (strncmp(buf + 5, "MAILER-DAEMON ", 14) != 0) {
 225                                         mail->mail_count++;
 226                                         was_new = 0;
 227
 228                                         if (reading_status == 1) {
 229                                                 mail->new_mail_count++;
 230                                         } else {
 231                                                 reading_status = 1;
 232                                         }
 233                                 }
 234                         } else {
 235                                 if (reading_status == 1
 236                                                 && strncmp(buf, "X-Mozilla-Status:", 17) == 0) {
 237                                         int xms = strtol(buf + 17, NULL, 16);
 238                                         /* check that mail isn't marked for deletion */
 239                                         if (xms & 0x0008) {
 240                                                 mail->trashed_mail_count++;
 241                                                 reading_status = 0;
 242                                                 /* Don't check whether the trashed email is unread */
 243                                                 continue;
 244                                         }
 245                                         /* check that mail isn't already read */
 246                                         if (!(xms & 0x0001)) {
 247                                                 mail->new_mail_count++;
 248                                                 was_new = 1;
 249                                         }
 250
 251                                         /* check for an additional X-Status header */
 252                                         reading_status = 2;
 253                                         continue;
 254                                 }
 255                                 if (reading_status == 1 && strncmp(buf, "Status:", 7) == 0) {
 256                                         /* check that mail isn't already read */
 257                                         if (strchr(buf + 7, 'R') == NULL) {
 258                                                 mail->new_mail_count++;
 259                                                 was_new = 1;
 260                                         }
 261
 262                                         reading_status = 2;
 263                                         continue;
 264                                 }
 265                                 if (reading_status >= 1 && strncmp(buf, "X-Status:", 9) == 0) {
 266                                         /* check that mail isn't marked for deletion */
 267                                         if (strchr(buf + 9, 'D') != NULL) {
 268                                                 mail->trashed_mail_count++;
 269                                                 /* If the mail was previously detected as new,
 270                                                    subtract it from the new mail count */
 271                                                 if (was_new)
 272                                                         mail->new_mail_count--;
 273                                         }
 274
 275                                         reading_status = 0;
 276                                         continue;
 277                                 }
 278                         }
 279
 280                         /* skip until \n */
 281                         while (strchr(buf, '\n') == NULL && !feof(fp)) {
 282                                 fgets(buf, 128, fp);
 283                         }
 284                 }
 285
 286                 fclose(fp);
 287
 288                 if (reading_status) {
 289                         mail->new_mail_count++;
 290                 }
 291
 292                 mail->last_mtime = st.st_mtime;
 293         }
 294 }
 295
 296 #define MAXDATASIZE 1000
 297
 298 struct mail_s *parse_mail_args(char type, const char *arg)
 299 {
 300         struct mail_s *mail;
 301         char *tmp;
 302
 303         mail = malloc(sizeof(struct mail_s));
 304         memset(mail, 0, sizeof(struct mail_s));
 305
 306         if (sscanf(arg, "%128s %128s %128s", mail->host, mail->user, mail->pass)
 307                         != 3) {
 308                 if (type == POP3_TYPE) {
 309                         NORM_ERR("Scanning POP3 args failed");
 310                 } else if (type == IMAP_TYPE) {
 311                         NORM_ERR("Scanning IMAP args failed");
 312                 }
 313                 return 0;
 314         }
 315         // see if password needs prompting
 316         if (mail->pass[0] == '*' && mail->pass[1] == '\0') {
 317                 int fp = fileno(stdin);
 318                 struct termios term;
 319
 320                 tcgetattr(fp, &term);
 321                 term.c_lflag &= ~ECHO;
 322                 tcsetattr(fp, TCSANOW, &term);
 323                 printf("Enter mailbox password (%s@%s): ", mail->user, mail->host);
 324                 scanf("%128s", mail->pass);
 325                 printf("\n");
 326                 term.c_lflag |= ECHO;
 327                 tcsetattr(fp, TCSANOW, &term);
 328         }
 329         // now we check for optional args
 330         tmp = strstr(arg, "-r ");
 331         if (tmp) {
 332                 tmp += 3;
 333                 sscanf(tmp, "%u", &mail->retries);
 334         } else {
 335                 mail->retries = 5;      // 5 retries after failure
 336         }
 337         tmp = strstr(arg, "-i ");
 338         if (tmp) {
 339                 tmp += 3;
 340                 sscanf(tmp, "%f", &mail->interval);
 341         } else {
 342                 mail->interval = 300;   // 5 minutes
 343         }
 344         tmp = strstr(arg, "-p ");
 345         if (tmp) {
 346                 tmp += 3;
 347                 sscanf(tmp, "%lu", &mail->port);
 348         } else {
 349                 if (type == POP3_TYPE) {
 350                         mail->port = 110;       // default pop3 port
 351                 } else if (type == IMAP_TYPE) {
 352                         mail->port = 143;       // default imap port
 353                 }
 354         }
 355         if (type == IMAP_TYPE) {
 356                 tmp = strstr(arg, "-f ");
 357                 if (tmp) {
 358                         tmp += 3;
 359                         sscanf(tmp, "%s", mail->folder);
 360                 } else {
 361                         strncpy(mail->folder, "INBOX", 128);    // default imap inbox
 362                 }
 363         }
 364         tmp = strstr(arg, "-e ");
 365         if (tmp) {
 366                 int len = 1024;
 367                 tmp += 3;
 368
 369                 if (tmp[0] == '\'') {
 370                         len = strstr(tmp + 1, "'") - tmp - 1;
 371                         if (len > 1024) {
 372                                 len = 1024;
 373                         }
 374                 }
 375                 strncpy(mail->command, tmp + 1, len);
 376         } else {
 377                 mail->command[0] = '\0';
 378         }
 379         mail->p_timed_thread = NULL;
 380         return mail;
 381 }
 382
 383 int imap_command(int sockfd, const char *command, char *response, const char *verify)
 384 {
 385         struct timeval fetchtimeout;
 386         fd_set fdset;
 387         int res, numbytes = 0;
 388         if (send(sockfd, command, strlen(command), 0) == -1) {
 389                 perror("send");
 390                 return -1;
 391         }
 392         fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
 393         fetchtimeout.tv_usec = 0;
 394         FD_ZERO(&fdset);
 395         FD_SET(sockfd, &fdset);
 396         res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
 397         if (res > 0) {
 398                 if ((numbytes = recv(sockfd, response, MAXDATASIZE - 1, 0)) == -1) {
 399                         perror("recv");
 400                         return -1;
 401                 }
 402         }
 403         DBGP2("imap_command()  command: %s", command);
 404         DBGP2("imap_command() received: %s", response);
 405         response[numbytes] = '\0';
 406         if (strstr(response, verify) == NULL) {
 407                 return -1;
 408         }
 409         return 0;
 410 }
 411
 412 int imap_check_status(char *recvbuf, struct mail_s *mail)
 413 {
 414         char *reply;
 415         reply = strstr(recvbuf, " (MESSAGES ");
 416         if (!reply || strlen(reply) < 2) {
 417                 return -1;
 418         }
 419         reply += 2;
 420         *strchr(reply, ')') = '\0';
 421         if (reply == NULL) {
 422                 NORM_ERR("Error parsing IMAP response: %s", recvbuf);
 423                 return -1;
 424         } else {
 425                 timed_thread_lock(mail->p_timed_thread);
 426                 sscanf(reply, "MESSAGES %lu UNSEEN %lu", &mail->messages,
 427                                 &mail->unseen);
 428                 timed_thread_unlock(mail->p_timed_thread);
 429         }
 430         return 0;
 431 }
 432
 433 void imap_unseen_command(struct mail_s *mail, unsigned long old_unseen, unsigned long old_messages)
 434 {
 435         if (strlen(mail->command) > 1 && (mail->unseen > old_unseen
 436                                 || (mail->messages > old_messages && mail->unseen > 0))) {
 437                 // new mail goodie
 438                 if (system(mail->command) == -1) {
 439                         perror("system()");
 440                 }
 441         }
 442 }
 443
 444 void *imap_thread(void *arg)
 445 {
 446         int sockfd, numbytes;
 447         char recvbuf[MAXDATASIZE];
 448         char sendbuf[MAXDATASIZE];
 449         unsigned int fail = 0;
 450         unsigned long old_unseen = ULONG_MAX;
 451         unsigned long old_messages = ULONG_MAX;
 452         struct stat stat_buf;
 453         struct hostent he, *he_res = 0;
 454         int he_errno;
 455         char hostbuff[2048];
 456         struct sockaddr_in their_addr;  // connector's address information
 457         struct mail_s *mail = (struct mail_s *)arg;
 458         int has_idle = 0;
 459         int threadfd = timed_thread_readfd(mail->p_timed_thread);
 460
 461 #ifdef HAVE_GETHOSTBYNAME_R
 462         if (gethostbyname_r(mail->host, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) { // get the host info
 463                 NORM_ERR("IMAP gethostbyname_r: %s", hstrerror(h_errno));
 464                 exit(EXIT_FAILURE);
 465         }
 466 #else /* HAVE_GETHOSTBYNAME_R */
 467         if ((he_res = gethostbyname(mail->host)) == NULL) {     // get the host info
 468                 herror("gethostbyname");
 469                 exit(EXIT_FAILURE);
 470         }
 471 #endif /* HAVE_GETHOSTBYNAME_R */
 472         while (fail < mail->retries) {
 473                 struct timeval fetchtimeout;
 474                 int res;
 475                 fd_set fdset;
 476
 477                 if (fail > 0) {
 478                         NORM_ERR("Trying IMAP connection again for %s@%s (try %u/%u)",
 479                                         mail->user, mail->host, fail + 1, mail->retries);
 480                 }
 481                 do {
 482                         if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
 483                                 perror("socket");
 484                                 fail++;
 485                                 break;
 486                         }
 487
 488                         // host byte order
 489                         their_addr.sin_family = AF_INET;
 490                         // short, network byte order
 491                         their_addr.sin_port = htons(mail->port);
 492                         their_addr.sin_addr = *((struct in_addr *) he_res->h_addr);
 493                         // zero the rest of the struct
 494                         memset(&(their_addr.sin_zero), '\0', 8);
 495
 496                         if (connect(sockfd, (struct sockaddr *) &their_addr,
 497                                                 sizeof(struct sockaddr)) == -1) {
 498                                 perror("connect");
 499                                 fail++;
 500                                 break;
 501                         }
 502
 503                         fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
 504                         fetchtimeout.tv_usec = 0;
 505                         FD_ZERO(&fdset);
 506                         FD_SET(sockfd, &fdset);
 507                         res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
 508                         if (res > 0) {
 509                                 if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 510                                         perror("recv");
 511                                         fail++;
 512                                         break;
 513                                 }
 514                         } else {
 515                                 NORM_ERR("IMAP connection failed: timeout");
 516                                 fail++;
 517                                 break;
 518                         }
 519                         recvbuf[numbytes] = '\0';
 520                         DBGP2("imap_thread() received: %s", recvbuf);
 521                         if (strstr(recvbuf, "* OK") != recvbuf) {
 522                                 NORM_ERR("IMAP connection failed, probably not an IMAP server");
 523                                 fail++;
 524                                 break;
 525                         }
 526                         strncpy(sendbuf, "abc CAPABILITY\r\n", MAXDATASIZE);
 527                         if (imap_command(sockfd, sendbuf, recvbuf, "abc OK")) {
 528                                 fail++;
 529                                 break;
 530                         }
 531                         if (strstr(recvbuf, " IDLE ") != NULL) {
 532                                 has_idle = 1;
 533                         }
 534
 535                         strncpy(sendbuf, "a1 login ", MAXDATASIZE);
 536                         strncat(sendbuf, mail->user, MAXDATASIZE - strlen(sendbuf) - 1);
 537                         strncat(sendbuf, " ", MAXDATASIZE - strlen(sendbuf) - 1);
 538                         strncat(sendbuf, mail->pass, MAXDATASIZE - strlen(sendbuf) - 1);
 539                         strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 540                         if (imap_command(sockfd, sendbuf, recvbuf, "a1 OK")) {
 541                                 fail++;
 542                                 break;
 543                         }
 544
 545                         strncpy(sendbuf, "a2 STATUS ", MAXDATASIZE);
 546                         strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
 547                         strncat(sendbuf, " (MESSAGES UNSEEN)\r\n",
 548                                         MAXDATASIZE - strlen(sendbuf) - 1);
 549                         if (imap_command(sockfd, sendbuf, recvbuf, "a2 OK")) {
 550                                 fail++;
 551                                 break;
 552                         }
 553
 554                         if (imap_check_status(recvbuf, mail)) {
 555                                 fail++;
 556                                 break;
 557                         }
 558                         imap_unseen_command(mail, old_unseen, old_messages);
 559                         fail = 0;
 560                         old_unseen = mail->unseen;
 561                         old_messages = mail->messages;
 562
 563                         if (has_idle) {
 564                                 strncpy(sendbuf, "a4 SELECT ", MAXDATASIZE);
 565                                 strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
 566                                 strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 567                                 if (imap_command(sockfd, sendbuf, recvbuf, "a4 OK")) {
 568                                         fail++;
 569                                         break;
 570                                 }
 571
 572                                 strncpy(sendbuf, "a5 IDLE\r\n", MAXDATASIZE);
 573                                 if (imap_command(sockfd, sendbuf, recvbuf, "+ idling")) {
 574                                         fail++;
 575                                         break;
 576                                 }
 577                                 recvbuf[0] = '\0';
 578
 579                                 while (1) {
 580                                         /*
 581                                          * RFC 2177 says we have to re-idle every 29 minutes.
 582                                          * We'll do it every 20 minutes to be safe.
 583                                          */
 584                                         fetchtimeout.tv_sec = 1200;
 585                                         fetchtimeout.tv_usec = 0;
 586                                         DBGP2("idling...");
 587                                         FD_ZERO(&fdset);
 588                                         FD_SET(sockfd, &fdset);
 589                                         FD_SET(threadfd, &fdset);
 590                                         res = select(MAX(sockfd + 1, threadfd + 1), &fdset, NULL, NULL, NULL);
 591                                         if (timed_thread_test(mail->p_timed_thread, 1) || (res == -1 && errno == EINTR) || FD_ISSET(threadfd, &fdset)) {
 592                                                 if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
 593                                                         /* if a valid socket, close it */
 594                                                         close(sockfd);
 595                                                 }
 596                                                 timed_thread_exit(mail->p_timed_thread);
 597                                         } else if (res > 0) {
 598                                                 if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 599                                                         perror("recv idling");
 600                                                         fail++;
 601                                                         break;
 602                                                 }
 603                                         } else {
 604                                                 fail++;
 605                                                 break;
 606                                         }
 607                                         recvbuf[numbytes] = '\0';
 608                                         DBGP2("imap_thread() received: %s", recvbuf);
 609                                         if (strlen(recvbuf) > 2) {
 610                                                 unsigned long messages, recent;
 611                                                 char *buf = recvbuf;
 612                                                 char force_check = 0;
 613                                                 buf = strstr(buf, "EXISTS");
 614                                                 while (buf && strlen(buf) > 1 && strstr(buf + 1, "EXISTS")) {
 615                                                         buf = strstr(buf + 1, "EXISTS");
 616                                                 }
 617                                                 if (buf) {
 618                                                         // back up until we reach '*'
 619                                                         while (buf >= recvbuf && buf[0] != '*') {
 620                                                                 buf--;
 621                                                         }
 622                                                         if (sscanf(buf, "* %lu EXISTS\r\n", &messages) == 1) {
 623                                                                 timed_thread_lock(mail->p_timed_thread);
 624                                                                 if (mail->messages != messages) {
 625                                                                         force_check = 1;
 626                                                                         mail->messages = messages;
 627                                                                 }
 628                                                                 timed_thread_unlock(mail->p_timed_thread);
 629                                                         }
 630                                                 }
 631                                                 buf = recvbuf;
 632                                                 buf = strstr(buf, "RECENT");
 633                                                 while (buf && strlen(buf) > 1 && strstr(buf + 1, "RECENT")) {
 634                                                         buf = strstr(buf + 1, "RECENT");
 635                                                 }
 636                                                 if (buf) {
 637                                                         // back up until we reach '*'
 638                                                         while (buf >= recvbuf && buf[0] != '*') {
 639                                                                 buf--;
 640                                                         }
 641                                                         if (sscanf(buf, "* %lu RECENT\r\n", &recent) != 1) {
 642                                                                 recent = 0;
 643                                                         }
 644                                                 }
 645                                                 /*
 646                                                  * check if we got a FETCH from server, recent was
 647                                                  * something other than 0, or we had a timeout
 648                                                  */
 649                                                 buf = recvbuf;
 650                                                 if (recent > 0 || (buf && strstr(buf, " FETCH ")) || fetchtimeout.tv_sec == 0 || force_check) {
 651                                                         // re-check messages and unseen
 652                                                         if (imap_command(sockfd, "DONE\r\n", recvbuf, "a5 OK")) {
 653                                                                 fail++;
 654                                                                 break;
 655                                                         }
 656                                                         strncpy(sendbuf, "a2 STATUS ", MAXDATASIZE);
 657                                                         strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
 658                                                         strncat(sendbuf, " (MESSAGES UNSEEN)\r\n",
 659                                                                         MAXDATASIZE - strlen(sendbuf) - 1);
 660                                                         if (imap_command(sockfd, sendbuf, recvbuf, "a2 OK")) {
 661                                                                 fail++;
 662                                                                 break;
 663                                                         }
 664                                                         if (imap_check_status(recvbuf, mail)) {
 665                                                                 fail++;
 666                                                                 break;
 667                                                         }
 668                                                         strncpy(sendbuf, "a5 IDLE\r\n", MAXDATASIZE);
 669                                                         if (imap_command(sockfd, sendbuf, recvbuf, "+ idling")) {
 670                                                                 fail++;
 671                                                                 break;
 672                                                         }
 673                                                 }
 674                                                 /*
 675                                                  * check if we got a BYE from server
 676                                                  */
 677                                                 buf = recvbuf;
 678                                                 if (buf && strstr(buf, "* BYE")) {
 679                                                         // need to re-connect
 680                                                         break;
 681                                                 }
 682                                         } else {
 683                                                 fail++;
 684                                                 break;
 685                                         }
 686                                         imap_unseen_command(mail, old_unseen, old_messages);
 687                                         fail = 0;
 688                                         old_unseen = mail->unseen;
 689                                         old_messages = mail->messages;
 690                                 }
 691                                 if (fail) break;
 692                         } else {
 693                                 strncpy(sendbuf, "a3 logout\r\n", MAXDATASIZE);
 694                                 if (send(sockfd, sendbuf, strlen(sendbuf), 0) == -1) {
 695                                         perror("send a3");
 696                                         fail++;
 697                                         break;
 698                                 }
 699                                 fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
 700                                 fetchtimeout.tv_usec = 0;
 701                                 FD_ZERO(&fdset);
 702                                 FD_SET(sockfd, &fdset);
 703                                 res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
 704                                 if (res > 0) {
 705                                         if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 706                                                 perror("recv a3");
 707                                                 fail++;
 708                                                 break;
 709                                         }
 710                                 }
 711                                 recvbuf[numbytes] = '\0';
 712                                 DBGP2("imap_thread() received: %s", recvbuf);
 713                                 if (strstr(recvbuf, "a3 OK") == NULL) {
 714                                         NORM_ERR("IMAP logout failed: %s", recvbuf);
 715                                         fail++;
 716                                         break;
 717                                 }
 718                         }
 719                 } while (0);
 720                 if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
 721                         /* if a valid socket, close it */
 722                         close(sockfd);
 723                 }
 724                 if (timed_thread_test(mail->p_timed_thread, 0)) {
 725                         timed_thread_exit(mail->p_timed_thread);
 726                 }
 727         }
 728         mail->unseen = 0;
 729         mail->messages = 0;
 730         return 0;
 731 }
 732
 733 int pop3_command(int sockfd, const char *command, char *response, const char *verify)
 734 {
 735         struct timeval fetchtimeout;
 736         fd_set fdset;
 737         int res, numbytes = 0;
 738         if (send(sockfd, command, strlen(command), 0) == -1) {
 739                 perror("send");
 740                 return -1;
 741         }
 742         fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
 743         fetchtimeout.tv_usec = 0;
 744         FD_ZERO(&fdset);
 745         FD_SET(sockfd, &fdset);
 746         res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
 747         if (res > 0) {
 748                 if ((numbytes = recv(sockfd, response, MAXDATASIZE - 1, 0)) == -1) {
 749                         perror("recv");
 750                         return -1;
 751                 }
 752         }
 753         DBGP2("pop3_command() received: %s", response);
 754         response[numbytes] = '\0';
 755         if (strstr(response, verify) == NULL) {
 756                 return -1;
 757         }
 758         return 0;
 759 }
 760
 761 void *pop3_thread(void *arg)
 762 {
 763         int sockfd, numbytes;
 764         char recvbuf[MAXDATASIZE];
 765         char sendbuf[MAXDATASIZE];
 766         char *reply;
 767         unsigned int fail = 0;
 768         unsigned long old_unseen = ULONG_MAX;
 769         struct stat stat_buf;
 770         struct hostent he, *he_res = 0;
 771         int he_errno;
 772         char hostbuff[2048];
 773         struct sockaddr_in their_addr;  // connector's address information
 774         struct mail_s *mail = (struct mail_s *)arg;
 775
 776 #ifdef HAVE_GETHOSTBYNAME_R
 777         if (gethostbyname_r(mail->host, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) { // get the host info
 778                 NORM_ERR("POP3 gethostbyname_r: %s", hstrerror(h_errno));
 779                 exit(EXIT_FAILURE);
 780         }
 781 #else /* HAVE_GETHOSTBYNAME_R */
 782         if ((he_res = gethostbyname(mail->host)) == NULL) {     // get the host info
 783                 herror("gethostbyname");
 784                 exit(EXIT_FAILURE);
 785         }
 786 #endif /* HAVE_GETHOSTBYNAME_R */
 787         while (fail < mail->retries) {
 788                 struct timeval fetchtimeout;
 789                 int res;
 790                 fd_set fdset;
 791
 792                 if (fail > 0) {
 793                         NORM_ERR("Trying POP3 connection again for %s@%s (try %u/%u)",
 794                                         mail->user, mail->host, fail + 1, mail->retries);
 795                 }
 796                 do {
 797                         if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
 798                                 perror("socket");
 799                                 fail++;
 800                                 break;
 801                         }
 802
 803                         // host byte order
 804                         their_addr.sin_family = AF_INET;
 805                         // short, network byte order
 806                         their_addr.sin_port = htons(mail->port);
 807                         their_addr.sin_addr = *((struct in_addr *) he_res->h_addr);
 808                         // zero the rest of the struct
 809                         memset(&(their_addr.sin_zero), '\0', 8);
 810
 811                         if (connect(sockfd, (struct sockaddr *) &their_addr,
 812                                                 sizeof(struct sockaddr)) == -1) {
 813                                 perror("connect");
 814                                 fail++;
 815                                 break;
 816                         }
 817
 818                         fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
 819                         fetchtimeout.tv_usec = 0;
 820                         FD_ZERO(&fdset);
 821                         FD_SET(sockfd, &fdset);
 822                         res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
 823                         if (res > 0) {
 824                                 if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
 825                                         perror("recv");
 826                                         fail++;
 827                                         break;
 828                                 }
 829                         } else {
 830                                 NORM_ERR("POP3 connection failed: timeout\n");
 831                                 fail++;
 832                                 break;
 833                         }
 834                         DBGP2("pop3_thread received: %s", recvbuf);
 835                         recvbuf[numbytes] = '\0';
 836                         if (strstr(recvbuf, "+OK ") != recvbuf) {
 837                                 NORM_ERR("POP3 connection failed, probably not a POP3 server");
 838                                 fail++;
 839                                 break;
 840                         }
 841                         strncpy(sendbuf, "USER ", MAXDATASIZE);
 842                         strncat(sendbuf, mail->user, MAXDATASIZE - strlen(sendbuf) - 1);
 843                         strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 844                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
 845                                 fail++;
 846                                 break;
 847                         }
 848
 849                         strncpy(sendbuf, "PASS ", MAXDATASIZE);
 850                         strncat(sendbuf, mail->pass, MAXDATASIZE - strlen(sendbuf) - 1);
 851                         strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
 852                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
 853                                 NORM_ERR("POP3 server login failed: %s", recvbuf);
 854                                 fail++;
 855                                 break;
 856                         }
 857
 858                         strncpy(sendbuf, "STAT\r\n", MAXDATASIZE);
 859                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
 860                                 perror("send STAT");
 861                                 fail++;
 862                                 break;
 863                         }
 864
 865                         // now we get the data
 866                         reply = recvbuf + 4;
 867                         if (reply == NULL) {
 868                                 NORM_ERR("Error parsing POP3 response: %s", recvbuf);
 869                                 fail++;
 870                                 break;
 871                         } else {
 872                                 timed_thread_lock(mail->p_timed_thread);
 873                                 sscanf(reply, "%lu %lu", &mail->unseen, &mail->used);
 874                                 timed_thread_unlock(mail->p_timed_thread);
 875                         }
 876
 877                         strncpy(sendbuf, "QUIT\r\n", MAXDATASIZE);
 878                         if (pop3_command(sockfd, sendbuf, recvbuf, "+OK")) {
 879                                 NORM_ERR("POP3 logout failed: %s", recvbuf);
 880                                 fail++;
 881                                 break;
 882                         }
 883
 884                         if (strlen(mail->command) > 1 && mail->unseen > old_unseen) {
 885                                 // new mail goodie
 886                                 if (system(mail->command) == -1) {
 887                                         perror("system()");
 888                                 }
 889                         }
 890                         fail = 0;
 891                         old_unseen = mail->unseen;
 892                 } while (0);
 893                 if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
 894                         /* if a valid socket, close it */
 895                         close(sockfd);
 896                 }
 897                 if (timed_thread_test(mail->p_timed_thread, 0)) {
 898                         timed_thread_exit(mail->p_timed_thread);
 899                 }
 900         }
 901         mail->unseen = 0;
 902         mail->used = 0;
 903         return 0;
 904 }
 905