Fix IMAP IDLE with Google's IMAP service.
[monky] / src / mail.c
index d037fd9..ec1fbc9 100644 (file)
@@ -1,4 +1,7 @@
-/* Conky, a system monitor, based on torsmo
+/* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
+ * vim: ts=4 sw=4 noet ai cindent syntax=c
+ *
+ * Conky, a system monitor, based on torsmo
  *
  * Any original torsmo code is licensed under the BSD license
  *
@@ -7,7 +10,7 @@
  * Please see COPYING for details
  *
  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
- * Copyright (c) 2005-2008 Brenden Matthews, Philip Kovacs, et. al.
+ * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  *     (see AUTHORS)
  * All rights reserved.
  *
  *
  */
 
+#include "config.h"
+#include "conky.h"
+#include "common.h"
+#include "logging.h"
+#include "mail.h"
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/socket.h>
 #include <sys/stat.h>
 #include <sys/time.h>
+#include <sys/param.h>
 
 #include <dirent.h>
 #include <errno.h>
+#include <termios.h>
 
-#include "conky.h"
+/* MAX() is defined by a header included from conky.h
+ * maybe once this is not true anymore, so have an alternative
+ * waiting to drop in.
+ *
+ * #define MAX(a, b)  ((a > b) ? a : b)
+ */
 
 char *current_mail_spool;
 
@@ -52,11 +76,11 @@ void update_mail_count(struct local_mail_s *mail)
                mail->last_update = current_update_time;
        }
 
-       if (stat(mail->box, &st)) {
-               static int rep;
+       if (stat(mail->mbox, &st)) {
+               static int rep = 0;
 
                if (!rep) {
-                       ERR("can't stat %s: %s", mail->box, strerror(errno));
+                       NORM_ERR("can't stat %s: %s", mail->mbox, strerror(errno));
                        rep = 1;
                }
                return;
@@ -67,21 +91,27 @@ void update_mail_count(struct local_mail_s *mail)
                DIR *dir;
                char *dirname;
                struct dirent *dirent;
+               char *mailflags;
 
                mail->mail_count = mail->new_mail_count = 0;
-               dirname = (char *) malloc(sizeof(char) * (strlen(mail->box) + 5));
+               mail->seen_mail_count = mail->unseen_mail_count = 0;
+               mail->flagged_mail_count = mail->unflagged_mail_count = 0;
+               mail->forwarded_mail_count = mail->unforwarded_mail_count = 0;
+               mail->replied_mail_count = mail->unreplied_mail_count = 0;
+               mail->draft_mail_count = mail->trashed_mail_count = 0;
+               dirname = (char *) malloc(sizeof(char) * (strlen(mail->mbox) + 5));
                if (!dirname) {
-                       ERR("malloc");
+                       NORM_ERR("malloc");
                        return;
                }
-               strcpy(dirname, mail->box);
+               strcpy(dirname, mail->mbox);
                strcat(dirname, "/");
                /* checking the cur subdirectory */
                strcat(dirname, "cur");
 
                dir = opendir(dirname);
                if (!dir) {
-                       ERR("cannot open directory");
+                       NORM_ERR("cannot open directory");
                        free(dirname);
                        return;
                }
@@ -90,6 +120,41 @@ void update_mail_count(struct local_mail_s *mail)
                        /* . and .. are skipped */
                        if (dirent->d_name[0] != '.') {
                                mail->mail_count++;
+                               mailflags = (char *) malloc(sizeof(char) * strlen(strrchr(dirent->d_name, ',')));
+                               if (!mailflags) {
+                                       NORM_ERR("malloc");
+                                       free(dirname);
+                                       return;
+                               }
+                               strcpy(mailflags, strrchr(dirent->d_name, ','));
+                               if (!strchr(mailflags, 'T')) { /* The message is not in the trash */
+                                       if (strchr(mailflags, 'S')) { /*The message has been seen */
+                                               mail->seen_mail_count++;
+                                       } else {
+                                               mail->unseen_mail_count++;
+                                       }
+                                       if (strchr(mailflags, 'F')) { /*The message was flagged */
+                                               mail->flagged_mail_count++;
+                                       } else {
+                                               mail->unflagged_mail_count++;
+                                       }
+                                       if (strchr(mailflags, 'P')) { /*The message was forwarded */
+                                               mail->forwarded_mail_count++;
+                                       } else {
+                                               mail->unforwarded_mail_count++;
+                                       }
+                                       if (strchr(mailflags, 'R')) { /*The message was replied */
+                                               mail->replied_mail_count++;
+                                       } else {
+                                               mail->unreplied_mail_count++;
+                                       }
+                                       if (strchr(mailflags, 'D')) { /*The message is a draft */
+                                               mail->draft_mail_count++;
+                                       }
+                               } else {
+                                       mail->trashed_mail_count++;
+                               }
+                               free(mailflags);
                        }
                        dirent = readdir(dir);
                }
@@ -100,7 +165,7 @@ void update_mail_count(struct local_mail_s *mail)
 
                dir = opendir(dirname);
                if (!dir) {
-                       ERR("cannot open directory");
+                       NORM_ERR("cannot open directory");
                        free(dirname);
                        return;
                }
@@ -110,6 +175,7 @@ void update_mail_count(struct local_mail_s *mail)
                        if (dirent->d_name[0] != '.') {
                                mail->new_mail_count++;
                                mail->mail_count++;
+                               mail->unseen_mail_count++;  /* new messages cannot have been seen */
                        }
                        dirent = readdir(dir);
                }
@@ -131,7 +197,14 @@ void update_mail_count(struct local_mail_s *mail)
 
                mail->new_mail_count = mail->mail_count = 0;
 
-               fp = open_file(mail->box, &rep);
+               /* these flags are not supported for mbox */
+               mail->seen_mail_count = mail->unseen_mail_count = -1;
+               mail->flagged_mail_count = mail->unflagged_mail_count = -1;
+               mail->forwarded_mail_count = mail->unforwarded_mail_count = -1;
+               mail->replied_mail_count = mail->unreplied_mail_count = -1;
+               mail->draft_mail_count = mail->trashed_mail_count = -1;
+
+               fp = open_file(mail->mbox, &rep);
                if (!fp) {
                        return;
                }
@@ -140,6 +213,7 @@ void update_mail_count(struct local_mail_s *mail)
 
                while (!feof(fp)) {
                        char buf[128];
+                       int was_new = 0;
 
                        if (fgets(buf, 128, fp) == NULL) {
                                break;
@@ -149,28 +223,53 @@ void update_mail_count(struct local_mail_s *mail)
                                /* ignore MAILER-DAEMON */
                                if (strncmp(buf + 5, "MAILER-DAEMON ", 14) != 0) {
                                        mail->mail_count++;
+                                       was_new = 0;
 
-                                       if (reading_status) {
+                                       if (reading_status == 1) {
                                                mail->new_mail_count++;
                                        } else {
                                                reading_status = 1;
                                        }
                                }
                        } else {
-                               if (reading_status
+                               if (reading_status == 1
                                                && strncmp(buf, "X-Mozilla-Status:", 17) == 0) {
+                                       int xms = strtol(buf + 17, NULL, 16);
+                                       /* check that mail isn't marked for deletion */
+                                       if (xms & 0x0008) {
+                                               mail->trashed_mail_count++;
+                                               reading_status = 0;
+                                               /* Don't check whether the trashed email is unread */
+                                               continue;
+                                       }
                                        /* check that mail isn't already read */
-                                       if (strchr(buf + 21, '0')) {
+                                       if (!(xms & 0x0001)) {
                                                mail->new_mail_count++;
+                                               was_new = 1;
                                        }
 
-                                       reading_status = 0;
+                                       /* check for an additional X-Status header */
+                                       reading_status = 2;
                                        continue;
                                }
-                               if (reading_status && strncmp(buf, "Status:", 7) == 0) {
+                               if (reading_status == 1 && strncmp(buf, "Status:", 7) == 0) {
                                        /* check that mail isn't already read */
                                        if (strchr(buf + 7, 'R') == NULL) {
                                                mail->new_mail_count++;
+                                               was_new = 1;
+                                       }
+
+                                       reading_status = 2;
+                                       continue;
+                               }
+                               if (reading_status >= 1 && strncmp(buf, "X-Status:", 9) == 0) {
+                                       /* check that mail isn't marked for deletion */
+                                       if (strchr(buf + 9, 'D') != NULL) {
+                                               mail->trashed_mail_count++;
+                                               /* If the mail was previously detected as new,
+                                                  subtract it from the new mail count */
+                                               if (was_new)
+                                                       mail->new_mail_count--;
                                        }
 
                                        reading_status = 0;
@@ -193,3 +292,614 @@ void update_mail_count(struct local_mail_s *mail)
                mail->last_mtime = st.st_mtime;
        }
 }
+
+#define MAXDATASIZE 1000
+
+struct mail_s *parse_mail_args(char type, const char *arg)
+{
+       struct mail_s *mail;
+       char *tmp;
+
+       mail = malloc(sizeof(struct mail_s));
+       memset(mail, 0, sizeof(struct mail_s));
+
+       if (sscanf(arg, "%128s %128s %128s", mail->host, mail->user, mail->pass)
+                       != 3) {
+               if (type == POP3_TYPE) {
+                       NORM_ERR("Scanning POP3 args failed");
+               } else if (type == IMAP_TYPE) {
+                       NORM_ERR("Scanning IMAP args failed");
+               }
+               return 0;
+       }
+       // see if password needs prompting
+       if (mail->pass[0] == '*' && mail->pass[1] == '\0') {
+               int fp = fileno(stdin);
+               struct termios term;
+
+               tcgetattr(fp, &term);
+               term.c_lflag &= ~ECHO;
+               tcsetattr(fp, TCSANOW, &term);
+               printf("Enter mailbox password (%s@%s): ", mail->user, mail->host);
+               scanf("%128s", mail->pass);
+               printf("\n");
+               term.c_lflag |= ECHO;
+               tcsetattr(fp, TCSANOW, &term);
+       }
+       // now we check for optional args
+       tmp = strstr(arg, "-r ");
+       if (tmp) {
+               tmp += 3;
+               sscanf(tmp, "%u", &mail->retries);
+       } else {
+               mail->retries = 5;      // 5 retries after failure
+       }
+       tmp = strstr(arg, "-i ");
+       if (tmp) {
+               tmp += 3;
+               sscanf(tmp, "%f", &mail->interval);
+       } else {
+               mail->interval = 300;   // 5 minutes
+       }
+       tmp = strstr(arg, "-p ");
+       if (tmp) {
+               tmp += 3;
+               sscanf(tmp, "%lu", &mail->port);
+       } else {
+               if (type == POP3_TYPE) {
+                       mail->port = 110;       // default pop3 port
+               } else if (type == IMAP_TYPE) {
+                       mail->port = 143;       // default imap port
+               }
+       }
+       if (type == IMAP_TYPE) {
+               tmp = strstr(arg, "-f ");
+               if (tmp) {
+                       tmp += 3;
+                       sscanf(tmp, "%s", mail->folder);
+               } else {
+                       strncpy(mail->folder, "INBOX", 128);    // default imap inbox
+               }
+       }
+       tmp = strstr(arg, "-e ");
+       if (tmp) {
+               int len = 1024;
+               tmp += 3;
+
+               if (tmp[0] == '\'') {
+                       len = strstr(tmp + 1, "'") - tmp - 1;
+                       if (len > 1024) {
+                               len = 1024;
+                       }
+               }
+               strncpy(mail->command, tmp + 1, len);
+       } else {
+               mail->command[0] = '\0';
+       }
+       mail->p_timed_thread = NULL;
+       return mail;
+}
+
+int imap_command(int sockfd, const char *command, char *response, const char *verify)
+{
+       struct timeval fetchtimeout;
+       fd_set fdset;
+       int res, numbytes = 0;
+       if (send(sockfd, command, strlen(command), 0) == -1) {
+               perror("send");
+               return -1;
+       }
+       fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
+       fetchtimeout.tv_usec = 0;
+       FD_ZERO(&fdset);
+       FD_SET(sockfd, &fdset);
+       res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
+       if (res > 0) {
+               if ((numbytes = recv(sockfd, response, MAXDATASIZE - 1, 0)) == -1) {
+                       perror("recv");
+                       return -1;
+               }
+       }
+       DBGP2("imap_command()  command: %s", command);
+       DBGP2("imap_command() received: %s", response);
+       response[numbytes] = '\0';
+       if (strstr(response, verify) == NULL) {
+               return -1;
+       }
+       return 0;
+}
+
+int imap_check_status(char *recvbuf, struct mail_s *mail)
+{
+       char *reply;
+       reply = strstr(recvbuf, " (MESSAGES ");
+       if (!reply || strlen(reply) < 2) {
+               return -1;
+       }
+       reply += 2;
+       *strchr(reply, ')') = '\0';
+       if (reply == NULL) {
+               NORM_ERR("Error parsing IMAP response: %s", recvbuf);
+               return -1;
+       } else {
+               timed_thread_lock(mail->p_timed_thread);
+               sscanf(reply, "MESSAGES %lu UNSEEN %lu", &mail->messages,
+                               &mail->unseen);
+               timed_thread_unlock(mail->p_timed_thread);
+       }
+       return 0;
+}
+
+void imap_unseen_command(struct mail_s *mail, unsigned long old_unseen, unsigned long old_messages)
+{
+       if (strlen(mail->command) > 1 && (mail->unseen > old_unseen
+                               || (mail->messages > old_messages && mail->unseen > 0))) {
+               // new mail goodie
+               if (system(mail->command) == -1) {
+                       perror("system()");
+               }
+       }
+}
+
+void *imap_thread(void *arg)
+{
+       int sockfd, numbytes;
+       char recvbuf[MAXDATASIZE];
+       char sendbuf[MAXDATASIZE];
+       unsigned int fail = 0;
+       unsigned long old_unseen = ULONG_MAX;
+       unsigned long old_messages = ULONG_MAX;
+       struct stat stat_buf;
+       struct hostent he, *he_res = 0;
+       int he_errno;
+       char hostbuff[2048];
+       struct sockaddr_in their_addr;  // connector's address information
+       struct mail_s *mail = (struct mail_s *)arg;
+       int has_idle = 0;
+       int threadfd = timed_thread_readfd(mail->p_timed_thread);
+
+#ifdef HAVE_GETHOSTBYNAME_R
+       if (gethostbyname_r(mail->host, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) { // get the host info
+               NORM_ERR("IMAP gethostbyname_r: %s", hstrerror(h_errno));
+               exit(EXIT_FAILURE);
+       }
+#else /* HAVE_GETHOSTBYNAME_R */
+       if ((he_res = gethostbyname(mail->host)) == NULL) {     // get the host info
+               herror("gethostbyname");
+               exit(EXIT_FAILURE);
+       }
+#endif /* HAVE_GETHOSTBYNAME_R */
+       while (fail < mail->retries) {
+               struct timeval fetchtimeout;
+               int res;
+               fd_set fdset;
+
+               if (fail > 0) {
+                       NORM_ERR("Trying IMAP connection again for %s@%s (try %u/%u)",
+                                       mail->user, mail->host, fail + 1, mail->retries);
+               }
+               do {
+                       if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
+                               perror("socket");
+                               fail++;
+                               break;
+                       }
+
+                       // host byte order
+                       their_addr.sin_family = AF_INET;
+                       // short, network byte order
+                       their_addr.sin_port = htons(mail->port);
+                       their_addr.sin_addr = *((struct in_addr *) he_res->h_addr);
+                       // zero the rest of the struct
+                       memset(&(their_addr.sin_zero), '\0', 8);
+
+                       if (connect(sockfd, (struct sockaddr *) &their_addr,
+                                               sizeof(struct sockaddr)) == -1) {
+                               perror("connect");
+                               fail++;
+                               break;
+                       }
+
+                       fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
+                       fetchtimeout.tv_usec = 0;
+                       FD_ZERO(&fdset);
+                       FD_SET(sockfd, &fdset);
+                       res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
+                       if (res > 0) {
+                               if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
+                                       perror("recv");
+                                       fail++;
+                                       break;
+                               }
+                       } else {
+                               NORM_ERR("IMAP connection failed: timeout");
+                               fail++;
+                               break;
+                       }
+                       recvbuf[numbytes] = '\0';
+                       DBGP2("imap_thread() received: %s", recvbuf);
+                       if (strstr(recvbuf, "* OK") != recvbuf) {
+                               NORM_ERR("IMAP connection failed, probably not an IMAP server");
+                               fail++;
+                               break;
+                       }
+                       strncpy(sendbuf, "abc CAPABILITY\r\n", MAXDATASIZE);
+                       if (imap_command(sockfd, sendbuf, recvbuf, "abc OK")) {
+                               fail++;
+                               break;
+                       }
+                       if (strstr(recvbuf, " IDLE ") != NULL) {
+                               has_idle = 1;
+                       }
+
+                       strncpy(sendbuf, "a1 login ", MAXDATASIZE);
+                       strncat(sendbuf, mail->user, MAXDATASIZE - strlen(sendbuf) - 1);
+                       strncat(sendbuf, " ", MAXDATASIZE - strlen(sendbuf) - 1);
+                       strncat(sendbuf, mail->pass, MAXDATASIZE - strlen(sendbuf) - 1);
+                       strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
+                       if (imap_command(sockfd, sendbuf, recvbuf, "a1 OK")) {
+                               fail++;
+                               break;
+                       }
+
+                       strncpy(sendbuf, "a2 STATUS ", MAXDATASIZE);
+                       strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
+                       strncat(sendbuf, " (MESSAGES UNSEEN)\r\n",
+                                       MAXDATASIZE - strlen(sendbuf) - 1);
+                       if (imap_command(sockfd, sendbuf, recvbuf, "a2 OK")) {
+                               fail++;
+                               break;
+                       }
+
+                       if (imap_check_status(recvbuf, mail)) {
+                               fail++;
+                               break;
+                       }
+                       imap_unseen_command(mail, old_unseen, old_messages);
+                       fail = 0;
+                       old_unseen = mail->unseen;
+                       old_messages = mail->messages;
+
+                       if (has_idle) {
+                               strncpy(sendbuf, "a4 SELECT ", MAXDATASIZE);
+                               strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
+                               strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
+                               if (imap_command(sockfd, sendbuf, recvbuf, "a4 OK")) {
+                                       fail++;
+                                       break;
+                               }
+
+                               strncpy(sendbuf, "a5 IDLE\r\n", MAXDATASIZE);
+                               if (imap_command(sockfd, sendbuf, recvbuf, "+ idling")) {
+                                       fail++;
+                                       break;
+                               }
+                               recvbuf[0] = '\0';
+
+                               while (1) {
+                                       /*
+                                        * RFC 2177 says we have to re-idle every 29 minutes.
+                                        * We'll do it every 20 minutes to be safe.
+                                        */
+                                       fetchtimeout.tv_sec = 1200;
+                                       fetchtimeout.tv_usec = 0;
+                                       DBGP2("idling...");
+                                       FD_ZERO(&fdset);
+                                       FD_SET(sockfd, &fdset);
+                                       FD_SET(threadfd, &fdset);
+                                       res = select(MAX(sockfd + 1, threadfd + 1), &fdset, NULL, NULL, NULL);
+                                       if (timed_thread_test(mail->p_timed_thread, 1) || (res == -1 && errno == EINTR) || FD_ISSET(threadfd, &fdset)) {
+                                               if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
+                                                       /* if a valid socket, close it */
+                                                       close(sockfd);
+                                               }
+                                               timed_thread_exit(mail->p_timed_thread);
+                                       } else if (res > 0) {
+                                               if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
+                                                       perror("recv idling");
+                                                       fail++;
+                                                       break;
+                                               }
+                                       } else {
+                                               fail++;
+                                               break;
+                                       }
+                                       recvbuf[numbytes] = '\0';
+                                       DBGP2("imap_thread() received: %s", recvbuf);
+                                       if (strlen(recvbuf) > 2) {
+                                               unsigned long messages, recent;
+                                               char *buf = recvbuf;
+                                               char force_check = 0;
+                                               buf = strstr(buf, "EXISTS");
+                                               while (buf && strlen(buf) > 1 && strstr(buf + 1, "EXISTS")) {
+                                                       buf = strstr(buf + 1, "EXISTS");
+                                               }
+                                               if (buf) {
+                                                       // back up until we reach '*'
+                                                       while (buf >= recvbuf && buf[0] != '*') {
+                                                               buf--;
+                                                       }
+                                                       if (sscanf(buf, "* %lu EXISTS\r\n", &messages) == 1) {
+                                                               timed_thread_lock(mail->p_timed_thread);
+                                                               if (mail->messages != messages) {
+                                                                       force_check = 1;
+                                                                       mail->messages = messages;
+                                                               }
+                                                               timed_thread_unlock(mail->p_timed_thread);
+                                                       }
+                                               }
+                                               buf = recvbuf;
+                                               buf = strstr(buf, "RECENT");
+                                               while (buf && strlen(buf) > 1 && strstr(buf + 1, "RECENT")) {
+                                                       buf = strstr(buf + 1, "RECENT");
+                                               }
+                                               if (buf) {
+                                                       // back up until we reach '*'
+                                                       while (buf >= recvbuf && buf[0] != '*') {
+                                                               buf--;
+                                                       }
+                                                       if (sscanf(buf, "* %lu RECENT\r\n", &recent) != 1) {
+                                                               recent = 0;
+                                                       }
+                                               }
+                                               /*
+                                                * check if we got a FETCH from server, recent was
+                                                * something other than 0, or we had a timeout
+                                                */
+                                               buf = recvbuf;
+                                               if (recent > 0 || (buf && strstr(buf, " FETCH ")) || fetchtimeout.tv_sec == 0 || force_check) {
+                                                       // re-check messages and unseen
+                                                       if (imap_command(sockfd, "DONE\r\n", recvbuf, "a5 OK")) {
+                                                               fail++;
+                                                               break;
+                                                       }
+                                                       strncpy(sendbuf, "a2 STATUS ", MAXDATASIZE);
+                                                       strncat(sendbuf, mail->folder, MAXDATASIZE - strlen(sendbuf) - 1);
+                                                       strncat(sendbuf, " (MESSAGES UNSEEN)\r\n",
+                                                                       MAXDATASIZE - strlen(sendbuf) - 1);
+                                                       if (imap_command(sockfd, sendbuf, recvbuf, "a2 OK")) {
+                                                               fail++;
+                                                               break;
+                                                       }
+                                                       if (imap_check_status(recvbuf, mail)) {
+                                                               fail++;
+                                                               break;
+                                                       }
+                                                       strncpy(sendbuf, "a5 IDLE\r\n", MAXDATASIZE);
+                                                       if (imap_command(sockfd, sendbuf, recvbuf, "+ idling")) {
+                                                               fail++;
+                                                               break;
+                                                       }
+                                               }
+                                               /*
+                                                * check if we got a BYE from server
+                                                */
+                                               buf = recvbuf;
+                                               if (buf && strstr(buf, "* BYE")) {
+                                                       // need to re-connect
+                                                       break;
+                                               }
+                                       } else {
+                                               fail++;
+                                               break;
+                                       }
+                                       imap_unseen_command(mail, old_unseen, old_messages);
+                                       fail = 0;
+                                       old_unseen = mail->unseen;
+                                       old_messages = mail->messages;
+                               }
+                               if (fail) break;
+                       } else {
+                               strncpy(sendbuf, "a3 logout\r\n", MAXDATASIZE);
+                               if (send(sockfd, sendbuf, strlen(sendbuf), 0) == -1) {
+                                       perror("send a3");
+                                       fail++;
+                                       break;
+                               }
+                               fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
+                               fetchtimeout.tv_usec = 0;
+                               FD_ZERO(&fdset);
+                               FD_SET(sockfd, &fdset);
+                               res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
+                               if (res > 0) {
+                                       if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
+                                               perror("recv a3");
+                                               fail++;
+                                               break;
+                                       }
+                               }
+                               recvbuf[numbytes] = '\0';
+                               DBGP2("imap_thread() received: %s", recvbuf);
+                               if (strstr(recvbuf, "a3 OK") == NULL) {
+                                       NORM_ERR("IMAP logout failed: %s", recvbuf);
+                                       fail++;
+                                       break;
+                               }
+                       }
+               } while (0);
+               if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
+                       /* if a valid socket, close it */
+                       close(sockfd);
+               }
+               if (timed_thread_test(mail->p_timed_thread, 0)) {
+                       timed_thread_exit(mail->p_timed_thread);
+               }
+       }
+       mail->unseen = 0;
+       mail->messages = 0;
+       return 0;
+}
+
+int pop3_command(int sockfd, const char *command, char *response, const char *verify)
+{
+       struct timeval fetchtimeout;
+       fd_set fdset;
+       int res, numbytes = 0;
+       if (send(sockfd, command, strlen(command), 0) == -1) {
+               perror("send");
+               return -1;
+       }
+       fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
+       fetchtimeout.tv_usec = 0;
+       FD_ZERO(&fdset);
+       FD_SET(sockfd, &fdset);
+       res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
+       if (res > 0) {
+               if ((numbytes = recv(sockfd, response, MAXDATASIZE - 1, 0)) == -1) {
+                       perror("recv");
+                       return -1;
+               }
+       }
+       DBGP2("pop3_command() received: %s", response);
+       response[numbytes] = '\0';
+       if (strstr(response, verify) == NULL) {
+               return -1;
+       }
+       return 0;
+}
+
+void *pop3_thread(void *arg)
+{
+       int sockfd, numbytes;
+       char recvbuf[MAXDATASIZE];
+       char sendbuf[MAXDATASIZE];
+       char *reply;
+       unsigned int fail = 0;
+       unsigned long old_unseen = ULONG_MAX;
+       struct stat stat_buf;
+       struct hostent he, *he_res = 0;
+       int he_errno;
+       char hostbuff[2048];
+       struct sockaddr_in their_addr;  // connector's address information
+       struct mail_s *mail = (struct mail_s *)arg;
+
+#ifdef HAVE_GETHOSTBYNAME_R
+       if (gethostbyname_r(mail->host, &he, hostbuff, sizeof(hostbuff), &he_res, &he_errno)) { // get the host info
+               NORM_ERR("POP3 gethostbyname_r: %s", hstrerror(h_errno));
+               exit(EXIT_FAILURE);
+       }
+#else /* HAVE_GETHOSTBYNAME_R */
+       if ((he_res = gethostbyname(mail->host)) == NULL) {     // get the host info
+               herror("gethostbyname");
+               exit(EXIT_FAILURE);
+       }
+#endif /* HAVE_GETHOSTBYNAME_R */
+       while (fail < mail->retries) {
+               struct timeval fetchtimeout;
+               int res;
+               fd_set fdset;
+
+               if (fail > 0) {
+                       NORM_ERR("Trying POP3 connection again for %s@%s (try %u/%u)",
+                                       mail->user, mail->host, fail + 1, mail->retries);
+               }
+               do {
+                       if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
+                               perror("socket");
+                               fail++;
+                               break;
+                       }
+
+                       // host byte order
+                       their_addr.sin_family = AF_INET;
+                       // short, network byte order
+                       their_addr.sin_port = htons(mail->port);
+                       their_addr.sin_addr = *((struct in_addr *) he_res->h_addr);
+                       // zero the rest of the struct
+                       memset(&(their_addr.sin_zero), '\0', 8);
+
+                       if (connect(sockfd, (struct sockaddr *) &their_addr,
+                                               sizeof(struct sockaddr)) == -1) {
+                               perror("connect");
+                               fail++;
+                               break;
+                       }
+
+                       fetchtimeout.tv_sec = 60;       // 60 second timeout i guess
+                       fetchtimeout.tv_usec = 0;
+                       FD_ZERO(&fdset);
+                       FD_SET(sockfd, &fdset);
+                       res = select(sockfd + 1, &fdset, NULL, NULL, &fetchtimeout);
+                       if (res > 0) {
+                               if ((numbytes = recv(sockfd, recvbuf, MAXDATASIZE - 1, 0)) == -1) {
+                                       perror("recv");
+                                       fail++;
+                                       break;
+                               }
+                       } else {
+                               NORM_ERR("POP3 connection failed: timeout\n");
+                               fail++;
+                               break;
+                       }
+                       DBGP2("pop3_thread received: %s", recvbuf);
+                       recvbuf[numbytes] = '\0';
+                       if (strstr(recvbuf, "+OK ") != recvbuf) {
+                               NORM_ERR("POP3 connection failed, probably not a POP3 server");
+                               fail++;
+                               break;
+                       }
+                       strncpy(sendbuf, "USER ", MAXDATASIZE);
+                       strncat(sendbuf, mail->user, MAXDATASIZE - strlen(sendbuf) - 1);
+                       strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
+                       if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
+                               fail++;
+                               break;
+                       }
+
+                       strncpy(sendbuf, "PASS ", MAXDATASIZE);
+                       strncat(sendbuf, mail->pass, MAXDATASIZE - strlen(sendbuf) - 1);
+                       strncat(sendbuf, "\r\n", MAXDATASIZE - strlen(sendbuf) - 1);
+                       if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
+                               NORM_ERR("POP3 server login failed: %s", recvbuf);
+                               fail++;
+                               break;
+                       }
+
+                       strncpy(sendbuf, "STAT\r\n", MAXDATASIZE);
+                       if (pop3_command(sockfd, sendbuf, recvbuf, "+OK ")) {
+                               perror("send STAT");
+                               fail++;
+                               break;
+                       }
+
+                       // now we get the data
+                       reply = recvbuf + 4;
+                       if (reply == NULL) {
+                               NORM_ERR("Error parsing POP3 response: %s", recvbuf);
+                               fail++;
+                               break;
+                       } else {
+                               timed_thread_lock(mail->p_timed_thread);
+                               sscanf(reply, "%lu %lu", &mail->unseen, &mail->used);
+                               timed_thread_unlock(mail->p_timed_thread);
+                       }
+                       
+                       strncpy(sendbuf, "QUIT\r\n", MAXDATASIZE);
+                       if (pop3_command(sockfd, sendbuf, recvbuf, "+OK")) {
+                               NORM_ERR("POP3 logout failed: %s", recvbuf);
+                               fail++;
+                               break;
+                       }
+                       
+                       if (strlen(mail->command) > 1 && mail->unseen > old_unseen) {
+                               // new mail goodie
+                               if (system(mail->command) == -1) {
+                                       perror("system()");
+                               }
+                       }
+                       fail = 0;
+                       old_unseen = mail->unseen;
+               } while (0);
+               if ((fstat(sockfd, &stat_buf) == 0) && S_ISSOCK(stat_buf.st_mode)) {
+                       /* if a valid socket, close it */
+                       close(sockfd);
+               }
+               if (timed_thread_test(mail->p_timed_thread, 0)) {
+                       timed_thread_exit(mail->p_timed_thread);
+               }
+       }
+       mail->unseen = 0;
+       mail->used = 0;
+       return 0;
+}
+