/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ /* * Author: * Radek Doulik * * Copyright 2003 Ximian, Inc. (www.ximian.com) * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 * USA */ #ifdef HAVE_CONFIG_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mail-session.h" #include "em-junk-filter.h" #include #define d(x) x static pthread_mutex_t em_junk_sa_init_lock = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t em_junk_sa_report_lock = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t em_junk_sa_preferred_socket_path_lock = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t em_junk_sa_spamd_restart_lock = PTHREAD_MUTEX_INITIALIZER; static const char *em_junk_sa_get_name (void); static gboolean em_junk_sa_check_junk (CamelMimeMessage *msg); static void em_junk_sa_report_junk (CamelMimeMessage *msg); static void em_junk_sa_report_notjunk (CamelMimeMessage *msg); static void em_junk_sa_commit_reports (void); static void em_junk_sa_init (void); static void em_junk_sa_finalize (void); static void em_junk_sa_kill_spamd (void); static EMJunkPlugin spam_assassin_plugin = { { em_junk_sa_get_name, 1, em_junk_sa_check_junk, em_junk_sa_report_junk, em_junk_sa_report_notjunk, em_junk_sa_commit_reports, em_junk_sa_init, }, NULL, NULL }; static gboolean em_junk_sa_tested = FALSE; static gboolean em_junk_sa_spamd_tested = FALSE; static gboolean em_junk_sa_use_spamc = FALSE; static gboolean em_junk_sa_available = FALSE; static gboolean em_junk_sa_system_spamd_available = FALSE; static gboolean em_junk_sa_new_daemon_started = FALSE; static char *em_junk_sa_socket_path = NULL; static char *em_junk_sa_spamd_pidfile = NULL; static char *em_junk_sa_spamc_binary = NULL; static GConfClient *em_junk_sa_gconf = NULL; /* volatile so not cached between threads */ static volatile gboolean em_junk_sa_local_only; static volatile gboolean em_junk_sa_use_daemon; static char * em_junk_sa_preferred_socket_path; static char *em_junk_sa_spamc_binaries [3] = {"spamc", "/usr/sbin/spamc", NULL}; static char *em_junk_sa_spamd_binaries [3] = {"spamd", "/usr/sbin/spamd", NULL}; #define SPAMD_RESTARTS_SIZE 8 static time_t em_junk_sa_spamd_restarts [SPAMD_RESTARTS_SIZE] = {0, 0, 0, 0, 0, 0, 0, 0}; static int em_junk_sa_spamd_restarts_count = 0; char *em_junk_sa_spamc_gconf_binary = NULL; char *em_junk_sa_spamd_gconf_binary = NULL; static const char * em_junk_sa_get_name (void) { return _("Spamassassin (built-in)"); } static int pipe_to_sa_full (CamelMimeMessage *msg, const char *in, char **argv, int rv_err, int wait_for_termination, GByteArray *output_buffer) { int result, status, errnosav, fds[2], out_fds[2]; CamelStream *stream; char *program; pid_t pid; #if d(!)0 { int i; printf ("pipe_to_sa "); for (i = 0; argv[i]; i++) printf ("%s ", argv[i]); printf ("\n"); } #endif program = g_find_program_in_path (argv [0]); if (program == NULL) { d(printf ("program not found, returning %d\n", rv_err)); return rv_err; } g_free (program); if (pipe (fds) == -1) { errnosav = errno; d(printf ("failed to create a pipe (for use with spamassassin: %s\n", strerror (errno))); errno = errnosav; return rv_err; } if (output_buffer && pipe (out_fds) == -1) { errnosav = errno; d(printf ("failed to create a pipe (for use with spamassassin: %s\n", strerror (errno))); errno = errnosav; return rv_err; } if (!(pid = fork ())) { /* child process */ int maxfd, fd, nullfd; nullfd = open ("/dev/null", O_WRONLY); if (dup2 (fds[0], STDIN_FILENO) == -1 || dup2 (nullfd, STDERR_FILENO) == -1 || (output_buffer == NULL && dup2 (nullfd, STDOUT_FILENO) == -1) || (output_buffer != NULL && dup2 (out_fds[1], STDOUT_FILENO) == -1)) _exit (rv_err & 0377); close (fds [0]); if (output_buffer) close (out_fds [1]); setsid (); maxfd = sysconf (_SC_OPEN_MAX); for (fd = 3; fd < maxfd; fd++) fcntl (fd, F_SETFD, FD_CLOEXEC); execvp (argv[0], argv); _exit (rv_err & 0377); } else if (pid < 0) { errnosav = errno; close (fds[0]); close (fds[1]); errno = errnosav; return rv_err; } /* parent process */ close (fds[0]); if (output_buffer) close (out_fds [1]); if (msg) { stream = camel_stream_fs_new_with_fd (fds[1]); camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (msg), stream); camel_stream_flush (stream); camel_stream_close (stream); camel_object_unref (stream); } else if (in) { camel_write (fds[1], in, strlen (in)); close (fds[1]); } if (output_buffer) { CamelStreamMem *memstream; stream = camel_stream_fs_new_with_fd (out_fds[0]); memstream = (CamelStreamMem *) camel_stream_mem_new (); camel_stream_mem_set_byte_array (memstream, output_buffer); camel_stream_write_to_stream (stream, (CamelStream *) memstream); camel_object_unref (stream); g_byte_array_append (output_buffer, "", 1); d(printf ("child process output: %s len: %d\n", output_buffer->data, output_buffer->len)); } if (wait_for_termination) { d(printf ("wait for child %d termination\n", pid)); result = waitpid (pid, &status, 0); d(printf ("child %d terminated with result %d status %d exited %d exitstatus %d\n", pid, result, status, WIFEXITED (status), WEXITSTATUS (status))); if (result == -1 && errno == EINTR) { /* child process is hanging... */ kill (pid, SIGTERM); sleep (1); result = waitpid (pid, &status, WNOHANG); if (result == 0) { /* ...still hanging, set phasers to KILL */ kill (pid, SIGKILL); sleep (1); result = waitpid (pid, &status, WNOHANG); } } if (result != -1 && WIFEXITED (status)) return WEXITSTATUS (status); else return rv_err; } else return 0; } static int pipe_to_sa (CamelMimeMessage *msg, const char *in, char **argv) { return pipe_to_sa_full (msg, in, argv, -1, 1, NULL); } static char * em_junk_sa_get_socket_path () { if (em_junk_sa_preferred_socket_path) return em_junk_sa_preferred_socket_path; else return em_junk_sa_socket_path; } static gboolean em_junk_sa_test_spamd_running (char *binary, gboolean system) { char *argv[5]; int i = 0; gboolean rv; pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); d(fprintf (stderr, "test if spamd is running (system %d) or using socket path %s\n", system, em_junk_sa_get_socket_path ())); argv[i++] = binary; argv[i++] = "-x"; if (!system) { argv[i++] = "-U"; argv[i++] = em_junk_sa_get_socket_path (); } argv[i] = NULL; rv = pipe_to_sa (NULL, "From test@127.0.0.1", argv) == 0; d(fprintf (stderr, "result: %d (%s)\n", rv, rv ? "success" : "failed")); pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); return rv; } static void em_junk_sa_test_spamassassin (void) { char *argv [3] = { "spamassassin", "--version", NULL, }; if (pipe_to_sa (NULL, NULL, argv) != 0) em_junk_sa_available = FALSE; else em_junk_sa_available = TRUE; em_junk_sa_tested = TRUE; } #define MAX_SPAMD_PORTS 1 static gboolean em_junk_sa_run_spamd (char *binary) { char *argv[8]; int i; gboolean rv = FALSE; pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); d(fprintf (stderr, "looks like spamd is not running\n")); i = 0; argv[i++] = binary; argv[i++] = "--socketpath"; argv[i++] = em_junk_sa_get_socket_path (); if (em_junk_sa_local_only) argv[i++] = "--local"; //argv[i++] = "--daemonize"; argv[i++] = "--pidfile"; argv[i++] = em_junk_sa_spamd_pidfile; argv[i] = NULL; d(fprintf (stderr, "trying to run %s with socket path %s\n", binary, em_junk_sa_get_socket_path ())); if (!pipe_to_sa_full (NULL, NULL, argv, -1, 0, NULL)) { int i; struct timespec time_req; struct stat stat_buf; d(fprintf (stderr, "success\n")); d(fprintf (stderr, "waiting for spamd to come up\n")); time_req.tv_sec = 0; time_req.tv_nsec = 50000000; for (i = 0; i < 100; i ++) { if (stat (em_junk_sa_get_socket_path (), &stat_buf) == 0) { d(fprintf (stderr, "socket created\n")); break; } nanosleep (&time_req, NULL); } d(fprintf (stderr, "waiting is over (after %dms)\n", 50*i)); rv = TRUE; } pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); return rv; } static void em_junk_sa_start_own_daemon () { int b; em_junk_sa_new_daemon_started = FALSE; em_junk_sa_socket_path = e_mktemp ("spamd-socket-path-XXXXXX"); em_junk_sa_spamd_pidfile = e_mktemp ("spamd-pid-file-XXXXXX"); for (b = 0; em_junk_sa_spamd_binaries [b]; b ++) { em_junk_sa_use_spamc = em_junk_sa_run_spamd (em_junk_sa_spamd_binaries [b]); if (em_junk_sa_use_spamc) { em_junk_sa_new_daemon_started = TRUE; break; } } } static void em_junk_sa_find_spamc () { if (em_junk_sa_use_spamc && em_junk_sa_new_daemon_started) { int b; em_junk_sa_use_spamc = FALSE; for (b = 0; em_junk_sa_spamc_binaries [b]; b ++) { em_junk_sa_spamc_binary = em_junk_sa_spamc_binaries [b]; if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, FALSE)) { em_junk_sa_use_spamc = TRUE; break; } } } } static void em_junk_sa_test_spamd (void) { char *argv[4]; int i, b; gboolean try_system_spamd = TRUE; if (em_junk_sa_spamc_gconf_binary) { em_junk_sa_spamc_binaries [0] = em_junk_sa_spamc_gconf_binary; em_junk_sa_spamc_binaries [1] = NULL; } if (em_junk_sa_spamd_gconf_binary) { em_junk_sa_spamd_binaries [0] = em_junk_sa_spamd_gconf_binary; em_junk_sa_spamd_binaries [1] = NULL; try_system_spamd = FALSE; } em_junk_sa_use_spamc = FALSE; if (em_junk_sa_local_only && try_system_spamd) { i = 0; argv [i++] = "/bin/sh"; argv [i++] = "-c"; argv [i++] = "ps ax|grep -v grep|grep -E 'spamd.*(\\-L|\\-\\-local)'|grep -E -v '\\ \\-p\\ |\\ \\-\\-port\\ '"; argv[i] = NULL; if (pipe_to_sa (NULL, NULL, argv) != 0) { try_system_spamd = FALSE; d(fprintf (stderr, "there's no system spamd with -L/--local parameter running\n")); } } /* try to use sytem spamd first */ if (try_system_spamd) { for (b = 0; em_junk_sa_spamc_binaries [b]; b ++) { em_junk_sa_spamc_binary = em_junk_sa_spamc_binaries [b]; if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, TRUE)) { em_junk_sa_use_spamc = TRUE; em_junk_sa_system_spamd_available = TRUE; break; } } } /* if there's no system spamd running, try to use user one with user specified socket */ if (!em_junk_sa_use_spamc && em_junk_sa_preferred_socket_path) { for (b = 0; em_junk_sa_spamc_binaries [b]; b ++) { em_junk_sa_spamc_binary = em_junk_sa_spamc_binaries [b]; if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, FALSE)) { em_junk_sa_use_spamc = TRUE; em_junk_sa_system_spamd_available = FALSE; break; } } } /* unsuccessful? try to run one ourselfs */ if (!em_junk_sa_use_spamc) em_junk_sa_start_own_daemon (); /* new daemon started => let find spamc binary */ em_junk_sa_find_spamc (); d(fprintf (stderr, "use spamd: %s\n", em_junk_sa_use_spamc ? "yes" : "no")); em_junk_sa_spamd_tested = TRUE; } static gboolean em_junk_sa_is_available (void) { pthread_mutex_lock (&em_junk_sa_init_lock); if (!em_junk_sa_tested) em_junk_sa_test_spamassassin (); if (em_junk_sa_available && !em_junk_sa_spamd_tested && em_junk_sa_use_daemon) em_junk_sa_test_spamd (); pthread_mutex_unlock (&em_junk_sa_init_lock); return em_junk_sa_available; } static gboolean em_junk_sa_check_respawn_too_fast () { time_t time_now = time (NULL); gboolean rv; pthread_mutex_lock (&em_junk_sa_spamd_restart_lock); if (em_junk_sa_spamd_restarts_count >= SPAMD_RESTARTS_SIZE) { /* all restarts in last 5 minutes */ rv = (time_now - em_junk_sa_spamd_restarts [em_junk_sa_spamd_restarts_count % SPAMD_RESTARTS_SIZE] < 5*60); } else rv = FALSE; em_junk_sa_spamd_restarts [em_junk_sa_spamd_restarts_count % SPAMD_RESTARTS_SIZE] = time_now; em_junk_sa_spamd_restarts_count ++; pthread_mutex_unlock (&em_junk_sa_spamd_restart_lock); d(printf ("em_junk_sa_check_respawn_too_fast: %d\n", rv)); return rv; } static gboolean em_junk_sa_respawn_spamd () { d(printf ("em_junk_sa_respawn_spamd\n")); if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, em_junk_sa_system_spamd_available)) { /* false alert */ d(printf ("false alert, spamd still running\n")); return FALSE; } d(printf ("going to kill old spamd and start new one\n")); em_junk_sa_kill_spamd (); if (em_junk_sa_check_respawn_too_fast ()) { g_warning ("respawning of spamd too fast => fallback to use spamassassin directly"); em_junk_sa_use_spamc = em_junk_sa_use_daemon = FALSE; return FALSE; } em_junk_sa_start_own_daemon (); em_junk_sa_find_spamc (); d(printf ("%s\n", em_junk_sa_use_spamc ? "success" : "failed")); return em_junk_sa_use_spamc; } static gboolean em_junk_sa_check_junk (CamelMimeMessage *msg) { GByteArray *out = NULL; char *argv[7], *to_free = NULL; int i = 0, socket_i; gboolean rv; d(fprintf (stderr, "em_junk_sa_check_junk\n")); if (!em_junk_sa_is_available ()) return FALSE; if (em_junk_sa_use_spamc && em_junk_sa_use_daemon) { out = g_byte_array_new (); argv[i++] = em_junk_sa_spamc_binary; argv[i++] = "-c"; argv[i++] = "-t"; argv[i++] = "60"; if (!em_junk_sa_system_spamd_available) { argv[i++] = "-U"; pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); socket_i = i; argv[i++] = to_free = g_strdup (em_junk_sa_get_socket_path ()); pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); } } else { argv [i++] = "spamassassin"; argv [i++] = "--exit-code"; if (em_junk_sa_local_only) argv [i++] = "--local"; } argv[i] = NULL; rv = pipe_to_sa_full (msg, NULL, argv, 0, 1, out) != 0; if (!rv && out && !strcmp (out->data, "0/0\n")) { /* an error occured */ if (em_junk_sa_respawn_spamd ()) { g_byte_array_set_size (out, 0); pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); g_free (to_free); argv [socket_i] = to_free = g_strdup (em_junk_sa_get_socket_path ()); pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); rv = pipe_to_sa_full (msg, NULL, argv, 0, 1, out) != 0; } else if (!em_junk_sa_use_spamc) /* in case respawning were too fast we fallback to spamassassin */ rv = em_junk_sa_check_junk (msg); } g_free (to_free); d(fprintf (stderr, "em_junk_sa_check_junk rv = %d\n", rv)); if (out) g_byte_array_free (out, TRUE); return rv; } static void em_junk_sa_report_junk (CamelMimeMessage *msg) { char *argv[6] = { "sa-learn", "--no-rebuild", "--spam", "--single", NULL, NULL }; d(fprintf (stderr, "em_junk_sa_report_junk\n")); if (em_junk_sa_is_available ()) { if (em_junk_sa_local_only) argv[4] = "--local"; pthread_mutex_lock (&em_junk_sa_report_lock); pipe_to_sa (msg, NULL, argv); pthread_mutex_unlock (&em_junk_sa_report_lock); } } static void em_junk_sa_report_notjunk (CamelMimeMessage *msg) { char *argv[6] = { "sa-learn", "--no-rebuild", "--ham", "--single", NULL, NULL }; d(fprintf (stderr, "em_junk_sa_report_notjunk\n")); if (em_junk_sa_is_available ()) { if (em_junk_sa_local_only) argv[4] = "--local"; pthread_mutex_lock (&em_junk_sa_report_lock); pipe_to_sa (msg, NULL, argv); pthread_mutex_unlock (&em_junk_sa_report_lock); } } static void em_junk_sa_commit_reports (void) { char *argv[4] = { "sa-learn", "--rebuild", NULL, NULL }; d(fprintf (stderr, "em_junk_sa_commit_reports\n")); if (em_junk_sa_is_available ()) { if (em_junk_sa_local_only) argv[2] = "--local"; pthread_mutex_lock (&em_junk_sa_report_lock); pipe_to_sa (NULL, NULL, argv); pthread_mutex_unlock (&em_junk_sa_report_lock); } } static void em_junk_sa_setting_notify(GConfClient *gconf, guint cnxn_id, GConfEntry *entry, void *data) { GConfValue *value; char *tkey; g_return_if_fail (gconf_entry_get_key (entry) != NULL); if (!(value = gconf_entry_get_value (entry))) return; tkey = strrchr(entry->key, '/'); g_return_if_fail (tkey != NULL); if (!strcmp(tkey, "local_only")) em_junk_sa_local_only = gconf_value_get_bool(value); else if (!strcmp(tkey, "use_daemon")) em_junk_sa_use_daemon = gconf_value_get_bool(value); else if (!strcmp(tkey, "socket_path")) { pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); g_free (em_junk_sa_preferred_socket_path); em_junk_sa_preferred_socket_path = g_strdup (gconf_value_get_string(value)); pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); } } const EMJunkPlugin * em_junk_filter_get_plugin (void) { return &spam_assassin_plugin; } static void em_junk_sa_init (void) { pthread_mutex_lock (&em_junk_sa_init_lock); if (!em_junk_sa_gconf) { em_junk_sa_gconf = gconf_client_get_default(); gconf_client_add_dir (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa", GCONF_CLIENT_PRELOAD_ONELEVEL, NULL); em_junk_sa_local_only = gconf_client_get_bool (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/local_only", NULL); em_junk_sa_use_daemon = gconf_client_get_bool (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/use_daemon", NULL); pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); g_free (em_junk_sa_preferred_socket_path); em_junk_sa_preferred_socket_path = g_strdup (gconf_client_get_string (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/socket_path", NULL)); pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); gconf_client_notify_add(em_junk_sa_gconf, "/apps/evolution/mail/junk/sa", (GConfClientNotifyFunc)em_junk_sa_setting_notify, NULL, NULL, NULL); em_junk_sa_spamc_gconf_binary = gconf_client_get_string (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/spamc_binary", NULL); em_junk_sa_spamd_gconf_binary = gconf_client_get_string (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/spamd_binary", NULL); } pthread_mutex_unlock (&em_junk_sa_init_lock); atexit (em_junk_sa_finalize); } static void em_junk_sa_kill_spamd (void) { pthread_mutex_lock (&em_junk_sa_preferred_socket_path_lock); g_free (em_junk_sa_preferred_socket_path); em_junk_sa_preferred_socket_path = NULL; pthread_mutex_unlock (&em_junk_sa_preferred_socket_path_lock); if (em_junk_sa_new_daemon_started) { int fd = open (em_junk_sa_spamd_pidfile, O_RDONLY); if (fd != -1) { char pid_str [16]; int bytes; bytes = read (fd, pid_str, 15); if (bytes > 0) { int pid; pid_str [bytes] = 0; pid = atoi (pid_str); if (pid > 0) { kill (pid, SIGTERM); d(fprintf (stderr, "em_junk_sa_finalize send SIGTERM to daemon with pid %d\n", pid)); waitpid (pid, NULL, 0); } } close (fd); } } } static void em_junk_sa_finalize (void) { d(fprintf (stderr, "em_junk_sa_finalize\n")); em_junk_sa_kill_spamd (); }