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* Copyright (C)2008 Sourcefire, Inc.
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* Author: aCaB <acab@clamav.net>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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#include "clamav-config.h"
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#include <sys/types.h>
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#include <libmilter/mfapi.h>
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#include "shared/output.h"
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#include "shared/optparser.h"
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#include "shared/misc.h"
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#include "libclamav/default.h"
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#include "whitelist.h"
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struct smfiDesc descr;
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int main(int argc, char **argv) {
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const struct optstruct *opt;
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struct optstruct *opts;
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cl_initialize_crypto();
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memset(&descr, 0, sizeof(struct smfiDesc));
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descr.xxfi_name = "ClamAV"; /* filter name */
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descr.xxfi_version = SMFI_VERSION; /* milter version */
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descr.xxfi_flags = SMFIF_QUARANTINE; /* flags */
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descr.xxfi_connect = clamfi_connect; /* connection info filter */
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descr.xxfi_envfrom = clamfi_envfrom; /* envelope sender filter */
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descr.xxfi_envrcpt = clamfi_envrcpt; /* envelope recipient filter */
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descr.xxfi_header = clamfi_header; /* header filter */
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descr.xxfi_body = clamfi_body; /* body block */
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descr.xxfi_eom = clamfi_eom; /* end of message */
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descr.xxfi_abort = clamfi_abort; /* message aborted */
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opts = optparse(NULL, argc, argv, 1, OPT_MILTER, 0, NULL);
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mprintf("!Can't parse command line options\n");
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if(optget(opts, "help")->enabled) {
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printf("Usage: %s [-c <config-file>]\n\n", argv[0]);
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printf(" --help -h Show this help\n");
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printf(" --version -V Show version and exit\n");
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printf(" --config-file <file> -c Read configuration from file\n\n");
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for(x = 0; opts->filename[x]; x++)
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mprintf("^Ignoring option %s\n", opts->filename[x]);
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if(optget(opts, "version")->enabled) {
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printf("clamav-milter %s\n", get_version());
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pt = strdup(optget(opts, "config-file")->strarg);
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if((opts = optparse(pt, 0, NULL, 1, OPT_MILTER, 0, opts)) == NULL) {
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printf("%s: cannot parse config file %s\n", argv[0], pt);
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if((opt = optget(opts, "Chroot"))->enabled) {
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if(chdir(opt->strarg) != 0) {
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logg("!Cannot change directory to %s\n", opt->strarg);
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if(chroot(opt->strarg) != 0) {
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logg("!chroot to %s failed. Are you root?\n", opt->strarg);
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if(geteuid() == 0 && (opt = optget(opts, "User"))->enabled) {
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struct passwd *user = NULL;
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if((user = getpwnam(opt->strarg)) == NULL) {
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fprintf(stderr, "ERROR: Can't get information about user %s.\n", opt->strarg);
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if(optget(opts, "AllowSupplementaryGroups")->enabled) {
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#ifdef HAVE_INITGROUPS
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if(initgroups(opt->strarg, user->pw_gid)) {
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fprintf(stderr, "ERROR: initgroups() failed.\n");
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mprintf("!AllowSupplementaryGroups: initgroups() is not available, please disable AllowSupplementaryGroups\n");
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#ifdef HAVE_SETGROUPS
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if(setgroups(1, &user->pw_gid)) {
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fprintf(stderr, "ERROR: setgroups() failed.\n");
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if(setgid(user->pw_gid)) {
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fprintf(stderr, "ERROR: setgid(%d) failed.\n", (int) user->pw_gid);
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if(setuid(user->pw_uid)) {
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fprintf(stderr, "ERROR: setuid(%d) failed.\n", (int) user->pw_uid);
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logg_lock = !optget(opts, "LogFileUnlock")->enabled;
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logg_time = optget(opts, "LogTime")->enabled;
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logg_size = optget(opts, "LogFileMaxSize")->numarg;
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logg_verbose = mprintf_verbose = optget(opts, "LogVerbose")->enabled;
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logg_rotate = optget(opts, "LogRotate")->enabled;
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if((opt = optget(opts, "LogFile"))->enabled) {
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logg_file = opt->strarg;
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if(!cli_is_abspath(logg_file)) {
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fprintf(stderr, "ERROR: LogFile requires full path.\n");
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#if defined(USE_SYSLOG) && !defined(C_AIX)
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if(optget(opts, "LogSyslog")->enabled) {
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opt = optget(opts, "LogFacility");
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if((fac = logg_facility(opt->strarg)) == -1) {
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logg("!LogFacility: %s: No such facility.\n", opt->strarg);
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openlog("clamav-milter", LOG_PID, fac);
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if(logg("#+++ Started at %s", ctime(&currtime))) {
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fprintf(stderr, "ERROR: Can't initialize the internal logger\n");
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if((opt = optget(opts, "TemporaryDirectory"))->enabled)
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tempdir = opt->strarg;
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if(localnets_init(opts) || init_actions(opts)) {
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if((opt = optget(opts, "Whitelist"))->enabled && whitelist_init(opt->strarg)) {
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if((opt = optget(opts, "SkipAuthenticated"))->enabled && smtpauth_init(opt->strarg)) {
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pt = optget(opts, "AddHeader")->strarg;
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if(strcasecmp(pt, "No")) {
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if(((opt = optget(opts, "ReportHostname"))->enabled && strncpy(myname, opt->strarg, sizeof(myname))) || !gethostname(myname, sizeof(myname))) {
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myname[sizeof(myname)-1] = '\0';
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snprintf(xvirushdr, sizeof(xvirushdr), "clamav-milter %s at %s", get_version(), myname);
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snprintf(xvirushdr, sizeof(xvirushdr), "clamav-milter %s", get_version());
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xvirushdr[sizeof(xvirushdr)-1] = '\0';
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descr.xxfi_flags |= SMFIF_ADDHDRS;
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if(strcasecmp(pt, "Add")) { /* Replace or Yes */
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descr.xxfi_flags |= SMFIF_CHGHDRS;
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multircpt = optget(opts, "SupportMultipleRecipients")->enabled;
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if(!(my_socket = optget(opts, "MilterSocket")->strarg)) {
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logg("!Please configure the MilterSocket directive\n");
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if(!optget(opts, "Foreground")->enabled) {
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if(daemonize() == -1) {
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logg("!daemonize() failed\n");
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logg("^Can't change current working directory to root\n");
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if(smfi_setconn(my_socket) == MI_FAILURE) {
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logg("!smfi_setconn failed\n");
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if(smfi_register(descr) == MI_FAILURE) {
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logg("!smfi_register failed\n");
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opt = optget(opts, "FixStaleSocket");
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umsk = umask(0777); /* socket is created with 000 to avoid races */
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if(smfi_opensocket(opt->enabled) == MI_FAILURE) {
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logg("!Failed to create socket %s\n", my_socket);
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umask(umsk); /* restore umask */
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if(strncmp(my_socket, "inet:", 5) && strncmp(my_socket, "inet6:", 6)) {
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/* set group ownership and perms on the local socket */
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char *sock_name = my_socket;
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if(!strncmp(my_socket, "unix:", 5))
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if(!strncmp(my_socket, "local:", 6))
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if(*my_socket == ':')
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if(optget(opts, "MilterSocketGroup")->enabled) {
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char *gname = optget(opts, "MilterSocketGroup")->strarg, *end;
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gid_t sock_gid = strtol(gname, &end, 10);
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struct group *pgrp = getgrnam(gname);
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logg("!Unknown group %s\n", gname);
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sock_gid = pgrp->gr_gid;
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if(chown(sock_name, -1, sock_gid)) {
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logg("!Failed to change socket ownership to group %s\n", gname);
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if(optget(opts, "MilterSocketMode")->enabled) {
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sock_mode = strtol(optget(opts, "MilterSocketMode")->strarg, &end, 8);
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logg("!Invalid MilterSocketMode %s\n", optget(opts, "MilterSocketMode")->strarg);
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sock_mode = 0777 & ~umsk;
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if(chmod(sock_name, sock_mode & 0666)) {
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logg("!Cannot set milter socket permission to %s\n", optget(opts, "MilterSocketMode")->strarg);
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maxfilesize = optget(opts, "MaxFileSize")->numarg;
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logg("^Invalid MaxFileSize, using default (%d)\n", CLI_DEFAULT_MAXFILESIZE);
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maxfilesize = CLI_DEFAULT_MAXFILESIZE;
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readtimeout = optget(opts, "ReadTimeout")->numarg;
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logg("!Failed to init the socket pool\n");
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if((opt = optget(opts, "PidFile"))->enabled) {
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mode_t old_umask = umask(0002);
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if((fd = fopen(opt->strarg, "w")) == NULL) {
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logg("!Can't save PID in file %s\n", opt->strarg);
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if (fprintf(fd, "%u", (unsigned int)getpid())<0) {
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logg("!Can't save PID in file %s\n", opt->strarg);
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* vim: set cindent smartindent autoindent softtabstop=4 shiftwidth=4 tabstop=8:
added
removed
.pc/0002-Add-an-additional-n-after-the-number-in-the-pidfile.patch/clamav-milter/clamav-milter.c
