/* -*- 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;
}