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path: root/plugins/sa-junk-plugin/em-junk-filter.c
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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Radek Doulik <rodo@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#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 <signal.h>
#include <time.h>

#include <mail/em-junk.h>
#include <mail/em-utils.h>
#include <e-util/e-mktemp.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include "mail/em-config.h"
#include "shell/e-shell.h"

#include <gconf/gconf-client.h>

#define d(x) (camel_debug("junk")?(x):0)

G_LOCK_DEFINE_STATIC (init);
G_LOCK_DEFINE_STATIC (report);
G_LOCK_DEFINE_STATIC (socket_path);
G_LOCK_DEFINE_STATIC (spamd_restart);

gint e_plugin_lib_enable (EPlugin *ep, gint enable);
gboolean em_junk_sa_check_junk (EPlugin *ep, EMJunkTarget *target);
void em_junk_sa_report_junk (EPlugin *ep, EMJunkTarget *target);
void em_junk_sa_report_non_junk (EPlugin *ep, EMJunkTarget *target);
void em_junk_sa_commit_reports (EPlugin *ep);
gpointer em_junk_sa_validate_binary (EPlugin *ep);
GtkWidget *org_gnome_sa_use_remote_tests (struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data);

static void em_junk_sa_init (void);
static void em_junk_sa_finalize (void);
static void em_junk_sa_kill_spamd (void);

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 gboolean em_junk_sa_checked_spamassassin_version = FALSE;
static guint em_junk_sa_spamassassin_version = 0;
static gchar *em_junk_sa_socket_path = NULL;
static gchar *em_junk_sa_spamd_pidfile = NULL;
static const gchar *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 gchar * em_junk_sa_preferred_socket_path;

static const gchar *em_junk_sa_spamc_binaries [4] = {"spamc", "/usr/bin/spamc", "/usr/sbin/spamc", NULL};
static const gchar *em_junk_sa_spamd_binaries [4] = {"spamd", "/usr/bin/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 gint em_junk_sa_spamd_restarts_count = 0;

/* Variables to indicate whether spamd is running with --allow-tell */
static gint no_allow_tell;
static gboolean em_junk_sa_allow_tell_tested = FALSE;
static gboolean is_installed = FALSE;

gchar *em_junk_sa_spamc_gconf_binary = NULL;
gchar *em_junk_sa_spamd_gconf_binary = NULL;

static gint
pipe_to_sa_full (CamelMimeMessage *msg,
                 const gchar *in,
                 const gchar **argv,
                 gint rv_err,
                 gint wait_for_termination,
                 GByteArray *output_buffer,
                 GCancellable *cancellable,
                 GError **error)
{
    gint result, status, errnosav, fds[2], out_fds[2];
    CamelStream *stream;
    gchar *program;
    pid_t pid;

    if (camel_debug_start ("junk")) {
        gint i;

        printf ("pipe_to_sa ");
        for (i = 0; argv[i]; i++)
            printf ("%s ", argv[i]);
        printf ("\n");
        camel_debug_end ();
    }

    program = g_find_program_in_path (argv[0]);
    if (program == NULL) {
        d(printf ("program not found, returning %d\n", rv_err));
        g_set_error (error, EM_JUNK_ERROR, rv_err, _("SpamAssassin not found, code: %d"), 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", g_strerror (errno)));
        g_set_error (error, EM_JUNK_ERROR, errnosav, _("Failed to create pipe: %s"), g_strerror (errnosav));
        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", g_strerror (errno)));
        g_set_error (error, EM_JUNK_ERROR, errnosav, _("Failed to create pipe: %s"), g_strerror (errnosav));
        close (fds[0]);
        close (fds[1]);
        errno = errnosav;
        return rv_err;
    }

    if (!(pid = fork ())) {
        /* child process */
        gint 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], (gchar * const *) argv);
        _exit (rv_err & 0377);
    } else if (pid < 0) {
        errnosav = errno;
        close (fds[0]);
        close (fds[1]);
        if (output_buffer) {
            close (out_fds[0]);
            close (out_fds[1]);
        }
        if (errnosav != 0 && errnosav != -1)
            g_set_error (error, EM_JUNK_ERROR, errnosav, _("Error after fork: %s"), g_strerror (errnosav));
        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_sync (
            CAMEL_DATA_WRAPPER (msg), stream, cancellable, NULL);
        camel_stream_flush (stream, cancellable, NULL);
        camel_stream_close (stream, cancellable, NULL);
        g_object_unref (stream);
    } else if (in) {
        camel_write (fds[1], in, strlen (in), cancellable, NULL);
        close (fds[1]);
    }

    if (output_buffer) {
        CamelStream *memstream;

        stream = camel_stream_fs_new_with_fd (out_fds[0]);

        memstream = camel_stream_mem_new ();
        camel_stream_mem_set_byte_array (
            CAMEL_STREAM_MEM (memstream), output_buffer);

        camel_stream_write_to_stream (
            stream, memstream, cancellable, NULL);
        g_object_unref (stream);
        g_byte_array_append (output_buffer, (guchar *)"", 1);

        d(printf ("child process output: %s len: %d\n", output_buffer->data, output_buffer->len));
    }

    if (wait_for_termination) {
        gint res;

        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);
                    g_set_error (error, EM_JUNK_ERROR, -2, _("SpamAssassin child process does not respond, killing..."));
            } else
                g_set_error (error, EM_JUNK_ERROR, -3, _("Wait for SpamAssassin child process interrupted, terminating..."));
        }

        if (result != -1 && WIFEXITED (status))
            res = WEXITSTATUS (status);
        else
            res = rv_err;

        if (res >= 64)
            g_set_error (error, EM_JUNK_ERROR, res, _("Pipe to SpamAssassin failed, error code: %d"), res);

        return res;
    } else
        return 0;
}

static gint
pipe_to_sa (CamelMimeMessage *msg,
            const gchar *in,
            const gchar **argv,
            GCancellable *cancellable,
            GError **error)
{
    return pipe_to_sa_full (msg, in, argv, -1, 1, NULL, cancellable, error);
}

static gchar *
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 (const gchar *binary, gboolean system)
{
    const gchar *argv[5];
    gint i = 0;
    gboolean rv;

    G_LOCK (socket_path);

    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, NULL, NULL) == 0;

    d(fprintf (stderr, "result: %d (%s)\n", rv, rv ? "success" : "failed"));

    G_UNLOCK (socket_path);

    return rv;
}

/*
  One time test to see if spamd is running with --allow-tell.  The call
  to spamc should return 0 if it is.  (Thanks to Karsten Bräckelmann
  for the idea).
*/
static void
em_junk_sa_test_allow_tell (void)
{
    const gchar *argv[4] = {
        "spamc",
        "-L",
        "forget",
        NULL
    };

    no_allow_tell = pipe_to_sa (NULL, "\n" , argv, NULL, NULL);
    em_junk_sa_allow_tell_tested = TRUE;
}

static void
em_junk_sa_test_spamassassin (void)
{
    const gchar *argv[3] = {
        "spamassassin",
        "--version",
        NULL,
    };

    if (pipe_to_sa (NULL, NULL, argv, NULL, NULL) != 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 (const gchar *binary)
{
    const gchar *argv[8];
    gint i;
    gboolean rv = FALSE;

    G_LOCK (socket_path);

    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";

    /* See bug #268852*/
    argv[i++] = "--max-children=1";
    /*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, NULL, NULL)) {
        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;
    }

    G_UNLOCK (socket_path);

    return rv;
}

static void
em_junk_sa_start_own_daemon ()
{
    gint 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) {
        gint 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)
{
    const gchar *argv[4];
    gint 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, NULL, NULL) != 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 (GError **error)
{
    G_LOCK (init);

    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 ();

    if (!em_junk_sa_available && error) {
        if (is_installed)
            g_set_error (error, EM_JUNK_ERROR, 1, _("SpamAssassin is not available. Please install it first."));

        is_installed = FALSE;
    }

    /* While we're at it, see if spamd is running with --allow-tell */
    if (!em_junk_sa_allow_tell_tested)
        em_junk_sa_test_allow_tell ();

    G_UNLOCK (init);

    return em_junk_sa_available;
}

static gboolean
em_junk_sa_check_respawn_too_fast ()
{
    time_t time_now = time (NULL);
    gboolean rv;

    G_LOCK (spamd_restart);

    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++;

    G_UNLOCK (spamd_restart);

    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;
}

gboolean
em_junk_sa_check_junk (EPlugin *ep, EMJunkTarget *target)
{
    GByteArray *out = NULL;
    const gchar *argv[7];
    gchar *to_free = NULL;
    gint i = 0, socket_i;
    gboolean rv;
    CamelMimeMessage *msg = target->m;

    if (!is_installed)
        return FALSE;

    d(fprintf (stderr, "em_junk_sa_check_junk\n"));

    if (!em_junk_sa_is_available (&target->error)) {
        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";

            G_LOCK (socket_path);
            socket_i = i;
            argv[i++] = to_free = g_strdup (em_junk_sa_get_socket_path ());
            G_UNLOCK (socket_path);
        }
    } 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, NULL, &target->error) != 0;

    if (!rv && out && out->data && !strcmp ((const gchar *)out->data, "0/0\n")) {
        /* an error occurred */
        if (em_junk_sa_respawn_spamd ()) {
            g_byte_array_set_size (out, 0);

            G_LOCK (socket_path);
            g_free (to_free);
            argv[socket_i] = to_free = g_strdup (em_junk_sa_get_socket_path ());
            G_UNLOCK (socket_path);

            rv = pipe_to_sa_full (msg, NULL, argv, 0, 1, out, NULL, &target->error) != 0;
        } else if (!em_junk_sa_use_spamc)
            /* in case respawning were too fast we fallback to spamassassin */
            rv = em_junk_sa_check_junk (ep, target);
    }

    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 guint
get_spamassassin_version ()
{
    GByteArray *out = NULL;
    gint i;

    const gchar *argv[3] = {
        "sa-learn",
        "--version",
        NULL
    };

    if (!em_junk_sa_checked_spamassassin_version) {
        out = g_byte_array_new ();

        if (pipe_to_sa_full (NULL, NULL, argv, -1, 1, out, NULL, NULL) != 0) {
            if (out)
                g_byte_array_free (out, TRUE);
            return em_junk_sa_spamassassin_version;
        }

        if (out->len > 0) {
            for (i = 0; i < out->len; i++) {
                if (g_ascii_isdigit (out->data[i])) {
                    em_junk_sa_spamassassin_version = (out->data[i] - '0');
                    em_junk_sa_checked_spamassassin_version = TRUE;
                    break;
                }
            }
        }

        if (out)
            g_byte_array_free (out, TRUE);
    }

    return em_junk_sa_spamassassin_version;
}

void
em_junk_sa_report_junk (EPlugin *ep, EMJunkTarget *target)
{
    const gchar *sync_op =
        (get_spamassassin_version () >= 3)
        ? "--no-sync": "--no-rebuild";
    const gchar *argv[6] = {
        "sa-learn",
        sync_op,
        "--spam",
        "--single",
        NULL,
        NULL
    };
    /* Call setup for spamc */
    const gchar *argv2[4] = {
      "spamc",
      "-L",
      "spam",
      NULL
    };
    CamelMimeMessage *msg = target->m;

    if (!is_installed)
        return;

    d(fprintf (stderr, "em_junk_sa_report_junk\n"));
    if (em_junk_sa_is_available (&target->error)) {
        if (no_allow_tell && em_junk_sa_local_only)
            argv[4] = "--local";

        G_LOCK (report);
        pipe_to_sa (msg, NULL,
                (no_allow_tell ? argv : argv2),
                NULL, &target->error);
        G_UNLOCK (report);
    }
}

void
em_junk_sa_report_non_junk (EPlugin *ep, EMJunkTarget *target)
{
    const gchar *sync_op =
        (get_spamassassin_version () >= 3)
        ? "--no-sync": "--no-rebuild";
    const gchar *argv[6] = {
        "sa-learn",
        sync_op,
        "--ham",
        "--single",
        NULL,
        NULL
    };
    /* Setup for spamc */
    const gchar *argv2[4] = {
      "spamc",
      "-L",
      "ham",
      NULL
    };
    CamelMimeMessage *msg = target->m;

    if (!is_installed)
        return;

    d(fprintf (stderr, "em_junk_sa_report_notjunk\n"));

    if (em_junk_sa_is_available (&target->error)) {

        if (no_allow_tell && em_junk_sa_local_only)
            argv[4] = "--local";
        G_LOCK (report);
        pipe_to_sa (msg, NULL,
                (no_allow_tell ? argv : argv2),
                NULL, &target->error);
        G_UNLOCK (report);
    }
}

void
em_junk_sa_commit_reports (EPlugin *ep)
{
    const gchar *sync_op =
        (get_spamassassin_version () >= 3) ? "--sync": "--rebuild";
    const gchar *argv[4] = {
        "sa-learn",
        sync_op,
        NULL,
        NULL
    };

    /* Only meaningful if we're using sa-learn */
    if (!no_allow_tell || !is_installed)
        return;

    d(fprintf (stderr, "em_junk_sa_commit_reports\n"));

    if (em_junk_sa_is_available (NULL)) {
        if (em_junk_sa_local_only)
            argv[2] = "--local";

        G_LOCK (report);
        pipe_to_sa (NULL, NULL, argv, NULL, NULL);
        G_UNLOCK (report);
    }
}

gpointer
em_junk_sa_validate_binary (EPlugin *ep)
{
    gpointer res = em_junk_sa_is_available (NULL) ? (gpointer) "1" : NULL;

    if (res != NULL)
        is_installed = TRUE;

    return res;
}

static void
em_junk_sa_setting_notify (GConfClient *gconf, guint cnxn_id, GConfEntry *entry, gpointer data)
{
    GConfValue *value;
    gchar *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")) {
        G_LOCK (socket_path);
        g_free (em_junk_sa_preferred_socket_path);
        em_junk_sa_preferred_socket_path = g_strdup (gconf_value_get_string (value));
        G_UNLOCK (socket_path);
    }
}

gint
e_plugin_lib_enable (EPlugin *ep, gint enable)
{
    is_installed = enable != 0;

    if (is_installed)
        em_junk_sa_tested = FALSE;

    em_junk_sa_init ();

    return 0;
}

static void
em_junk_sa_init (void)
{
    G_LOCK (init);

    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);

        G_LOCK (socket_path);
        g_free (em_junk_sa_preferred_socket_path);
        em_junk_sa_preferred_socket_path = gconf_client_get_string (em_junk_sa_gconf, "/apps/evolution/mail/junk/sa/socket_path", NULL);
        G_UNLOCK (socket_path);

        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);

        atexit (em_junk_sa_finalize);
    }

    G_UNLOCK (init);
}

static void
em_junk_sa_kill_spamd (void)
{
    G_LOCK (socket_path);
    g_free (em_junk_sa_preferred_socket_path);
    em_junk_sa_preferred_socket_path = NULL;
    G_UNLOCK (socket_path);

    if (em_junk_sa_new_daemon_started) {
        gint fd = open (em_junk_sa_spamd_pidfile, O_RDONLY);

        if (fd != -1) {
            gchar pid_str[16];
            gint bytes;

            bytes = read (fd, pid_str, 15);
            if (bytes > 0) {
                gint 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"));

    g_object_unref (em_junk_sa_gconf);
    em_junk_sa_kill_spamd ();
}

static void
use_remote_tests_cb (GtkWidget *widget, gpointer data)
{
    gboolean active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget));
    gconf_client_set_bool (em_junk_sa_gconf, data, !active, NULL);
}

GtkWidget *
org_gnome_sa_use_remote_tests (struct _EPlugin *epl, struct _EConfigHookItemFactoryData *data)
{
    EShell *shell;
    GtkWidget *check, *vbox, *label;
    gchar *text = g_strdup_printf ("    <small>%s</small>", _("This will make SpamAssassin more reliable, but slower"));
    guint n_rows;

    g_object_get (data->parent, "n-rows", &n_rows, NULL);

    if (data->old)
        return data->old;

    check = gtk_check_button_new_with_mnemonic (_("I_nclude remote tests"));
    label = gtk_label_new (NULL);
    gtk_label_set_markup (GTK_LABEL (label), text);
    g_free (text);
    vbox = gtk_vbox_new (FALSE, 2);
    gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (check), FALSE, FALSE, 0);
    gtk_box_pack_start (GTK_BOX (vbox), GTK_WIDGET (label), FALSE, FALSE, 0);

    gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (check), !em_junk_sa_local_only);
    g_signal_connect (GTK_TOGGLE_BUTTON (check), "toggled", G_CALLBACK (use_remote_tests_cb), (gpointer) "/apps/evolution/mail/junk/sa/local_only");
    gtk_table_attach (
        GTK_TABLE (data->parent), vbox,
        0, 1, n_rows, n_rows+1, 0, 0, 0, 0);

    shell = e_shell_get_default ();
    if (e_shell_get_express_mode (shell))
        gtk_widget_hide (vbox);
    else
        gtk_widget_show_all (vbox);

    return vbox;
}