/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Author:
* Radek Doulik <rodo@ximian.com>
*
* 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 <config.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <pthread.h>
#include <camel/camel-file-utils.h>
#include <camel/camel-data-wrapper.h>
#include <camel/camel-stream-fs.h>
#include "mail-session.h"
#include "em-junk-filter.h"
#include <gconf/gconf.h>
#include <gconf/gconf-client.h>
#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 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 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,
},
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 int em_junk_sa_spamd_port = -1;
static char *em_junk_sa_spamc_binary = NULL;
static GConfClient *em_junk_sa_gconf = NULL;
static const char *
em_junk_sa_get_name (void)
{
return _("Spamassassin (built-in)");
}
static gboolean
em_junk_sa_get_local_only ()
{
return gconf_client_get_bool (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/local_only", NULL);
}
static gboolean
em_junk_sa_get_use_daemon ()
{
return gconf_client_get_bool (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/use_daemon", NULL);
}
static int
em_junk_sa_get_daemon_port ()
{
return gconf_client_get_int (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/daemon_port", NULL);
}
static int
pipe_to_sa_with_error (CamelMimeMessage *msg, const char *in, char **argv, int rv_err)
{
int result, status, errnosav, 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 (!(pid = fork ())) {
/* child process */
int maxfd, fd, nullfd;
nullfd = open ("/dev/null", O_WRONLY);
if (dup2 (fds[0], STDIN_FILENO) == -1 ||
dup2 (nullfd, STDOUT_FILENO) == -1 ||
dup2 (nullfd, STDERR_FILENO) == -1)
_exit (rv_err & 0377);
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 (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]);
}
result = waitpid (pid, &status, 0);
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;
}
static int
pipe_to_sa (CamelMimeMessage *msg, const char *in, char **argv)
{
return pipe_to_sa_with_error (msg, in, argv, -1);
}
static gboolean
em_junk_sa_test_spamd_running (char *binary, int port)
{
char port_buf[12], *argv[5];
int i = 0;
d(fprintf (stderr, "test if spamd is running (port %d) using %s\n", port, binary));
argv[i++] = binary;
argv[i++] = "-x";
if (port > 0) {
sprintf (port_buf, "%d", port);
argv[i++] = "-p";
argv[i++] = port_buf;
}
argv[i] = NULL;
return pipe_to_sa (NULL, "From test@127.0.0.1", argv) == 0;
}
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, int *port)
{
char *argv[6];
char port_buf[12];
int i, p = em_junk_sa_get_daemon_port ();
d(fprintf (stderr, "looks like spamd is not running\n"));
i = 0;
argv[i++] = binary;
argv[i++] = "--port";
argv[i++] = port_buf;
if (em_junk_sa_get_local_only ())
argv[i++] = "--local";
argv[i++] = "--daemonize";
argv[i] = NULL;
for (i = 0; i < MAX_SPAMD_PORTS; i++, p++) {
d(fprintf (stderr, "trying to run %s at port %d\n", binary, p));
snprintf (port_buf, 11, "%d", p);
if (!pipe_to_sa (NULL, NULL, argv)) {
d(fprintf (stderr, "success at port %d\n", p));
*port = p;
return TRUE;
}
}
return FALSE;
}
static void
em_junk_sa_test_spamd (void)
{
char *argv[4];
int i, b;
gboolean try_system_spamd = TRUE;
gboolean new_daemon_started = FALSE;
char *spamc_binaries [3] = {"spamc", "/usr/sbin/spamc", NULL};
char *spamd_binaries [3] = {"spamd", "/usr/sbin/spamd", NULL};
em_junk_sa_use_spamc = FALSE;
if (em_junk_sa_get_local_only ()) {
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; spamc_binaries [b]; b ++) {
em_junk_sa_spamc_binary = spamc_binaries [b];
if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, -1)) {
em_junk_sa_use_spamc = TRUE;
em_junk_sa_spamd_port = -1;
break;
}
}
}
/* if there's no system spamd running, try to use user one on evo spamd port */
if (!em_junk_sa_use_spamc) {
int port = em_junk_sa_get_daemon_port ();
for (i = 0; i < MAX_SPAMD_PORTS; i ++, port ++) {
for (b = 0; spamc_binaries [b]; b ++) {
em_junk_sa_spamc_binary = spamc_binaries [b];
if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, port)) {
em_junk_sa_use_spamc = TRUE;
em_junk_sa_spamd_port = port;
break;
}
}
}
}
/* unsuccessful? try to run one ourselfs */
if (!em_junk_sa_use_spamc)
for (b = 0; spamd_binaries [b]; b ++) {
em_junk_sa_use_spamc = em_junk_sa_run_spamd (spamd_binaries [b], &em_junk_sa_spamd_port);
if (em_junk_sa_use_spamc) {
new_daemon_started = TRUE;
break;
}
}
/* new daemon started => let find spamc binary */
if (em_junk_sa_use_spamc && new_daemon_started) {
em_junk_sa_use_spamc = FALSE;
for (b = 0; spamc_binaries [b]; b ++) {
em_junk_sa_spamc_binary = spamc_binaries [b];
if (em_junk_sa_test_spamd_running (em_junk_sa_spamc_binary, em_junk_sa_spamd_port)) {
em_junk_sa_use_spamc = TRUE;
break;
}
}
}
d(fprintf (stderr, "use spamd %d at port %d with %s\n", em_junk_sa_use_spamc, em_junk_sa_spamd_port, em_junk_sa_spamc_binary));
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_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);
}
if (!em_junk_sa_tested)
em_junk_sa_test_spamassassin ();
if (em_junk_sa_available && !em_junk_sa_spamd_tested && em_junk_sa_get_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_junk (CamelMimeMessage *msg)
{
char *argv[5], buf[12];
int i = 0;
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_get_use_daemon ()) {
argv[i++] = em_junk_sa_spamc_binary;
argv[i++] = "-c";
if (em_junk_sa_spamd_port != -1) {
sprintf (buf, "%d", em_junk_sa_spamd_port);
argv[i++] = "-p";
argv[i++] = buf;
}
} else {
argv [i++] = "spamassassin";
argv [i++] = "--exit-code";
if (em_junk_sa_get_local_only ())
argv [i++] = "--local";
}
argv[i] = NULL;
return pipe_to_sa_with_error (msg, NULL, argv, 0) != 0;
}
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_get_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_get_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_get_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);
}
}
const EMJunkPlugin *
em_junk_filter_get_plugin (void)
{
return &spam_assassin_plugin;
}