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-rw-r--r--mail/em-junk-filter.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/mail/em-junk-filter.c b/mail/em-junk-filter.c
new file mode 100644
index 0000000000..04bbadc2ba
--- /dev/null
+++ b/mail/em-junk-filter.c
@@ -0,0 +1,327 @@
+/* -*- 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
+ */
+
+#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-data-wrapper.h>
+#include <camel/camel-stream-fs.h>
+
+#include "em-junk-filter.h"
+
+#define LOCK(x) pthread_mutex_lock(&x)
+#define UNLOCK(x) pthread_mutex_unlock(&x)
+
+static pthread_mutex_t em_junk_sa_test_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_spamd_tested = FALSE;
+static gboolean em_junk_sa_use_spamc = FALSE;
+static gint em_junk_sa_spamd_port = -1;
+
+#define d(x) x
+
+static const char *
+em_junk_sa_get_name (void)
+{
+ return _("Spamassassin (built-in)");
+}
+
+static int
+pipe_to_sa (CamelMimeMessage *msg, gchar *in, int argc, gchar **argv)
+{
+ CamelStream *stream;
+ int result, status;
+ int in_fds[2];
+ pid_t pid;
+
+ if (argc < 1 || argv[0] == '\0')
+ return 0;
+
+ if (pipe (in_fds) == -1) {
+ /* camel_exception_setv (fms->ex, CAMEL_EXCEPTION_SYSTEM,
+ _("Failed to create pipe to '%s': %s"),
+ argv[0]->value.string, g_strerror (errno)); */
+ return -1;
+ }
+
+ if (!(pid = fork ())) {
+ /* child process */
+ int maxfd, fd;
+
+ fd = open ("/dev/null", O_WRONLY);
+
+ if (dup2 (in_fds[0], STDIN_FILENO) < 0 ||
+ dup2 (fd, STDOUT_FILENO) < 0 ||
+ dup2 (fd, STDERR_FILENO) < 0)
+ _exit (255);
+
+ setsid ();
+
+ maxfd = sysconf (_SC_OPEN_MAX);
+ if (maxfd > 0) {
+ for (fd = 0; fd < maxfd; fd++) {
+ if (fd != STDIN_FILENO && fd != STDOUT_FILENO && fd != STDERR_FILENO)
+ close (fd);
+ }
+ }
+
+ execvp (argv [0], argv);
+
+ d(printf ("Could not execute %s: %s\n", argv [0], g_strerror (errno)));
+ _exit (255);
+ } else if (pid < 0) {
+ /* camel_exception_setv (fms->ex, CAMEL_EXCEPTION_SYSTEM,
+ _("Failed to create create child process '%s': %s"),
+ argv[0]->value.string, g_strerror (errno)); */
+ return -1;
+ }
+
+ /* parent process */
+ close (in_fds[0]);
+ fcntl (in_fds[1], F_SETFL, O_NONBLOCK);
+
+ if (msg) {
+ stream = camel_stream_fs_new_with_fd (in_fds[1]);
+
+ camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (msg), stream);
+ camel_stream_flush (stream);
+ camel_object_unref (CAMEL_OBJECT (stream));
+ } else if (in) {
+ write (in_fds [1], in, strlen (in));
+ close (in_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 -1;
+}
+
+
+#define NPORTS 1
+
+static int
+em_junk_sa_test_spamd_running (gint port)
+{
+ static gchar *sac_args [3] = {
+ "/bin/sh",
+ "-c",
+ NULL
+ };
+ int retval;
+
+ d(fprintf (stderr, "test if spamd is running (port %d)\n", port);)
+ sac_args [2] = port > 0 ? g_strdup_printf ("spamc -x -p %d", port) : g_strdup_printf ("spamc -x");
+
+ retval = pipe_to_sa (NULL, "From test@127.0.0.1", 3, sac_args) == 0;
+ g_free (sac_args [2]);
+
+ return retval;
+}
+
+static void
+em_junk_sa_test_spamd ()
+{
+ gint i, port = 7830;
+
+ em_junk_sa_use_spamc = FALSE;
+
+ /* if (em_junk_sa_test_spamd_running (-1)) {
+ em_junk_sa_use_spamc = TRUE;
+ em_junk_sa_spamd_port = -1;
+ } else { */
+ for (i = 0; i < NPORTS; i ++) {
+ if (em_junk_sa_test_spamd_running (port)) {
+ em_junk_sa_use_spamc = TRUE;
+ em_junk_sa_spamd_port = port;
+ break;
+ }
+ port ++;
+ }
+ /* } */
+
+ if (!em_junk_sa_use_spamc) {
+ static gchar *sad_args [3] = {
+ "/bin/sh",
+ "-c",
+ NULL
+ };
+ gint i, port = 7830;
+
+ d(fprintf (stderr, "looks like spamd is not running\n");)
+
+ for (i = 0; i < NPORTS; i ++) {
+ d(fprintf (stderr, "trying to run spamd at port %d\n", port));
+
+ sad_args [2] = g_strdup_printf ("spamd --port %d --local --daemonize", port);
+ if (!pipe_to_sa (NULL, NULL, 3, sad_args)) {
+ g_free (sad_args [2]);
+ em_junk_sa_use_spamc = TRUE;
+ em_junk_sa_spamd_port = port;
+ d(fprintf (stderr, "success at port %d\n", port));
+ break;
+ }
+ g_free (sad_args [2]);
+ port ++;
+ }
+ }
+
+ d(fprintf (stderr, "use spamd %d at port %d\n", em_junk_sa_use_spamc, em_junk_sa_spamd_port);)
+
+ em_junk_sa_spamd_tested = TRUE;
+}
+
+static gboolean
+em_junk_sa_check_junk (CamelMimeMessage *msg)
+{
+ static gchar *args [3] = {
+ "/bin/sh",
+ "-c",
+ NULL
+ };
+ gint retval;
+
+ d(fprintf (stderr, "em_junk_sa_check_junk\n"));
+
+ LOCK (em_junk_sa_test_lock);
+ if (!em_junk_sa_spamd_tested)
+ em_junk_sa_test_spamd ();
+ UNLOCK (em_junk_sa_test_lock);
+
+ args [2] = em_junk_sa_use_spamc
+ ? (em_junk_sa_spamd_port == -1
+ ? g_strdup ("spamc -c") /* Exit with a non-zero exit code if the
+ tested message was junk */
+ : g_strdup_printf ("spamc"
+ " -c" /* Exit with a non-zero exit code if the
+ tested message was junk */
+ " -p %d", em_junk_sa_spamd_port))
+ : g_strdup ("spamassassin"
+ " --exit-code" /* Exit with a non-zero exit code if the
+ tested message was junk */
+ " --local"); /* Local tests only (no online tests) */
+
+ retval = pipe_to_sa (msg, NULL, 3, args);
+
+ g_free (args [2]);
+
+ return retval;
+}
+
+static void
+em_junk_sa_report_junk (CamelMimeMessage *msg)
+{
+ static gchar *args [3] = {
+ "/bin/sh",
+ "-c",
+ "sa-learn"
+ " --no-rebuild" /* do not rebuild db */
+ " --spam" /* report junk */
+ " --single" /* single message */
+ " --local" /* local only */
+ };
+
+ d(fprintf (stderr, "em_junk_sa_report_junk\n");)
+
+ pipe_to_sa (msg, NULL, 3, args) > 0;
+}
+
+static void
+em_junk_sa_report_notjunk (CamelMimeMessage *msg)
+{
+ static gchar *args [3] = {
+ "/bin/sh",
+ "-c",
+ "sa-learn"
+ " --no-rebuild" /* do not rebuild db */
+ " --ham" /* report notjunk */
+ " --single" /* single message */
+ " --local" /* local only */
+ };
+
+ d(fprintf (stderr, "em_junk_sa_report_notjunk\n");)
+
+ pipe_to_sa (msg, NULL, 3, args) > 0;
+}
+
+static void
+em_junk_sa_commit_reports (void)
+{
+ static gchar *args [3] = {
+ "/bin/sh",
+ "-c",
+ "sa-learn"
+ " --rebuild" /* do not rebuild db */
+ " --local" /* local only */
+ };
+
+ d(fprintf (stderr, "em_junk_sa_commit_reports\n");)
+
+ pipe_to_sa (NULL, NULL, 3, args) > 0;
+}
+
+const EMJunkPlugin *
+em_junk_filter_get_plugin (void)
+{
+ return &spam_assassin_plugin;
+}
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