-/* @(#) $Id: ./src/os_csyslogd/main.c, 2011/09/08 dcid Exp $
- */
-
/* Copyright (C) 2009 Trend Micro Inc.
* All rights reserved.
*
* and/or modify it under the terms of the GNU General Public
* License (version 2) as published by the FSF - Free Software
* Foundation.
- *
- * License details at the LICENSE file included with OSSEC or
- * online at: http://www.ossec.net/en/licensing.html
*/
-
#include "csyslogd.h"
+/* Prototypes */
+static void help_csyslogd(void) __attribute__((noreturn));
-int main(int argc, char **argv)
+/* Print help statement */
+static void help_csyslogd()
{
- int c, test_config = 0,run_foreground = 0;
- int uid = 0,gid = 0;
+ print_header();
+ print_out(" %s: -[Vhdtf] [-u user] [-g group] [-c config] [-D dir]", ARGV0);
+ print_out(" -V Version and license message");
+ print_out(" -h This help message");
+ print_out(" -d Execute in debug mode. This parameter");
+ print_out(" can be specified multiple times");
+ print_out(" to increase the debug level.");
+ print_out(" -t Test configuration");
+ print_out(" -f Run in foreground");
+ print_out(" -u <user> User to run as (default: %s)", MAILUSER);
+ print_out(" -g <group> Group to run as (default: %s)", GROUPGLOBAL);
+ print_out(" -c <config> Configuration file to use (default: %s)", DEFAULTCPATH);
+ print_out(" -D <dir> Directory to chroot into (default: %s)", DEFAULTDIR);
+ print_out(" ");
+ exit(1);
+}
- /* Using MAILUSER (read only) */
- char *dir = DEFAULTDIR;
- char *user = MAILUSER;
- char *group = GROUPGLOBAL;
- char *cfg = DEFAULTCPATH;
+int main(int argc, char **argv)
+{
+ int c, test_config = 0, run_foreground = 0;
+ uid_t uid;
+ gid_t gid;
+ /* Use MAILUSER (read only) */
+ const char *dir = DEFAULTDIR;
+ const char *user = MAILUSER;
+ const char *group = GROUPGLOBAL;
+ const char *cfg = DEFAULTCPATH;
/* Database Structure */
- SyslogConfig **syslog_config = NULL;
-
+ SyslogConfig **syslog_config;
- /* Setting the name */
+ /* Set the name */
OS_SetName(ARGV0);
-
- while((c = getopt(argc, argv, "vVdhtfu:g:D:c:")) != -1){
- switch(c){
+ while ((c = getopt(argc, argv, "Vdhtfu:g:D:c:")) != -1) {
+ switch (c) {
case 'V':
print_version();
break;
- case 'v':
- print_version();
- break;
case 'h':
- help(ARGV0);
+ help_csyslogd();
break;
case 'd':
nowDebug();
run_foreground = 1;
break;
case 'u':
- if(!optarg)
- ErrorExit("%s: -u needs an argument",ARGV0);
- user=optarg;
+ if (!optarg) {
+ ErrorExit("%s: -u needs an argument", ARGV0);
+ }
+ user = optarg;
break;
case 'g':
- if(!optarg)
- ErrorExit("%s: -g needs an argument",ARGV0);
- group=optarg;
+ if (!optarg) {
+ ErrorExit("%s: -g needs an argument", ARGV0);
+ }
+ group = optarg;
break;
case 'D':
- if(!optarg)
- ErrorExit("%s: -D needs an argument",ARGV0);
- dir=optarg;
+ if (!optarg) {
+ ErrorExit("%s: -D needs an argument", ARGV0);
+ }
+ dir = optarg;
break;
case 'c':
- if(!optarg)
- ErrorExit("%s: -c needs an argument",ARGV0);
+ if (!optarg) {
+ ErrorExit("%s: -c needs an argument", ARGV0);
+ }
cfg = optarg;
break;
case 't':
test_config = 1;
break;
default:
- help(ARGV0);
+ help_csyslogd();
break;
}
-
}
-
- /* Starting daemon */
+ /* Start daemon */
debug1(STARTED_MSG, ARGV0);
-
/* Check if the user/group given are valid */
uid = Privsep_GetUser(user);
gid = Privsep_GetGroup(group);
- if((uid < 0)||(gid < 0))
- {
+ if (uid == (uid_t) - 1 || gid == (gid_t) - 1) {
ErrorExit(USER_ERROR, ARGV0, user, group);
}
+ /* Read configuration */
+ syslog_config = OS_ReadSyslogConf(test_config, cfg);
- /* Reading configuration */
- syslog_config = OS_ReadSyslogConf(test_config, cfg, syslog_config);
-
-
- /* Getting servers hostname */
+ /* Get server hostname */
memset(__shost, '\0', 512);
- if(gethostname(__shost, 512 -1) != 0)
- {
+ if (gethostname(__shost, 512 - 1) != 0) {
ErrorExit("%s: ERROR: gethostname() failed", ARGV0);
- }
- else
- {
+ } else {
+ /* Save the full hostname */
+ memcpy(__shost_long, __shost, 512);
+
char *ltmp;
/* Remove domain part if available */
ltmp = strchr(__shost, '.');
- if(ltmp)
+ if (ltmp) {
*ltmp = '\0';
+ }
}
-
/* Exit here if test config is set */
- if(test_config)
+ if (test_config) {
exit(0);
+ }
-
- if (!run_foreground)
- {
+ if (!run_foreground) {
/* Going on daemon mode */
nowDaemon();
goDaemon();
}
-
-
/* Not configured */
- if(!syslog_config || !syslog_config[0])
- {
+ if (!syslog_config || !syslog_config[0]) {
verbose("%s: INFO: Remote syslog server not configured. "
"Clean exit.", ARGV0);
exit(0);
}
+ /* Privilege separation */
+ if (Privsep_SetGroup(gid) < 0) {
+ ErrorExit(SETGID_ERROR, ARGV0, group, errno, strerror(errno));
+ }
+ /* chroot */
+ if (Privsep_Chroot(dir) < 0) {
+ ErrorExit(CHROOT_ERROR, ARGV0, dir, errno, strerror(errno));
+ }
- /* Privilege separation */
- if(Privsep_SetGroup(gid) < 0)
- ErrorExit(SETGID_ERROR,ARGV0,group);
-
-
- /* chrooting */
- if(Privsep_Chroot(dir) < 0)
- ErrorExit(CHROOT_ERROR,ARGV0,dir);
-
-
- /* Now on chroot */
+ /* Now in chroot */
nowChroot();
+ /* Change user */
+ if (Privsep_SetUser(uid) < 0) {
+ ErrorExit(SETUID_ERROR, ARGV0, user, errno, strerror(errno));
+ }
-
- /* Changing user */
- if(Privsep_SetUser(uid) < 0)
- ErrorExit(SETUID_ERROR,ARGV0,user);
-
-
- /* Basic start up completed. */
- debug1(PRIVSEP_MSG,ARGV0,dir,user);
-
+ /* Basic start up completed */
+ debug1(CHROOT_MSG, ARGV0, dir);
+ debug1(PRIVSEP_MSG, ARGV0, user);
/* Signal manipulation */
StartSIG(ARGV0);
-
- /* Creating PID files */
- if(CreatePID(ARGV0, getpid()) < 0)
+ /* Create PID files */
+ if (CreatePID(ARGV0, getpid()) < 0) {
ErrorExit(PID_ERROR, ARGV0);
-
+ }
/* Start up message */
verbose(STARTUP_MSG, ARGV0, (int)getpid());
-
- /* the real daemon now */
+ /* The real daemon now */
OS_CSyslogD(syslog_config);
- exit(0);
}
-
-/* EOF */
projects / ossec-hids.git / blobdiff