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

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