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snmpd.c
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/*
* snmpd.c
*/
/** @defgroup agent The Net-SNMP agent
* The snmp agent responds to SNMP queries from management stations
*/
/* Portions of this file are subject to the following copyrights. See
* the Net-SNMP's COPYING file for more details and other copyrights
* that may apply:
*/
/*
* Copyright 1988, 1989 by Carnegie Mellon University
*
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and its
* documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of CMU not be
* used in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
*
* CMU DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* CMU BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
* ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
* *****************************************************************
*/
/*
* Copyright © 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms specified in the COPYING file
* distributed with the Net-SNMP package.
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-features.h>
#include <net-snmp/types.h>
#ifdef HAVE_IO_H
#include <io.h>
#endif
#include <stdio.h>
#include <errno.h>
#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NET_IF_H
#include <net/if.h>
#endif
#ifdef HAVE_INET_MIB2_H
#include <inet/mib2.h>
#endif
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
#include <signal.h>
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_PROCESS_H
#include <process.h>
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#ifdef HAVE_GRP_H
#include <grp.h>
#endif
#ifdef HAVE_CRTDBG_H
#include <crtdbg.h>
#endif
#ifndef PATH_MAX
# ifdef _POSIX_PATH_MAX
# define PATH_MAX _POSIX_PATH_MAX
# else
# define PATH_MAX 255
# endif
#endif
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>
#include "agent_global_vars.h"
#include <net-snmp/library/fd_event_manager.h>
#include <net-snmp/library/large_fd_set.h>
#include "m2m.h"
#include <net-snmp/agent/agent_module_config.h>
#include <net-snmp/agent/mib_module_config.h>
#include "snmpd.h"
#include <net-snmp/agent/mib_modules.h>
#include <net-snmp/agent/agent_trap.h>
#include <net-snmp/agent/netsnmp_close_fds.h>
#include <net-snmp/agent/table.h>
#include <net-snmp/agent/table_iterator.h>
#include "../snmplib/snmp_syslog.h"
#include "mibgroup/util_funcs/restart.h"
/*
* Include winservice.h to support Windows Service
*/
#ifdef WIN32
#include <windows.h>
#include <tchar.h>
#include <net-snmp/library/winservice.h>
#define WIN32SERVICE
#endif
#ifndef NETSNMP_NO_SYSTEMD
#include <net-snmp/library/sd-daemon.h>
#endif
netsnmp_feature_want(logging_file);
netsnmp_feature_want(logging_stdio);
netsnmp_feature_want(logging_syslog);
/*
* Globals.
*/
#ifdef NETSNMP_USE_LIBWRAP
#include <tcpd.h>
#endif /* NETSNMP_USE_LIBWRAP */
#define TIMETICK 500000L
int snmp_dump_packet;
static int reconfig = 0;
int Facility = LOG_DAEMON;
#ifdef WIN32SERVICE
/*
* SNMP Agent Status
*/
#define AGENT_RUNNING 1
#define AGENT_STOPPED 0
int agent_status = AGENT_STOPPED;
/* app_name_long used for Event Log (syslog), SCM, registry etc */
LPCTSTR app_name_long = _T("Net-SNMP Agent"); /* Application Name */
#endif
const char *app_name = "snmpd";
#ifdef USING_SMUX_MODULE
#include <mibgroup/smux/smux.h>
#endif /* USING_SMUX_MODULE */
/*
* Prototypes.
*/
static void usage(char *);
static void SnmpTrapNodeDown(void);
static int receive(void);
#ifdef WIN32SERVICE
static void StopSnmpAgent(void);
#endif
static void
usage(char *prog)
{
#ifdef WIN32SERVICE
printf("\nUsage: %s [-register] [-quiet] [OPTIONS] [LISTENING ADDRESSES]"
"\n %s [-unregister] [-quiet]", prog, prog);
#else
printf("\nUsage: %s [OPTIONS] [LISTENING ADDRESSES]", prog);
#endif
printf("\n"
"\n\tVersion: %s\n%s"
"\t\t\t (config search path: %s)\n%s%s",
netsnmp_get_version(),
"\tWeb: http://www.net-snmp.org/\n"
"\tEmail: net-snmp-coders@lists.sourceforge.net\n"
"\n -a\t\t\tlog addresses\n"
" -A\t\t\tappend to the logfile rather than truncating it\n"
" -c FILE[,...]\t\tread FILE(s) as configuration file(s)\n"
" -C\t\t\tdo not read the default configuration files\n",
get_configuration_directory(),
" -d\t\t\tdump sent and received SNMP packets\n"
#ifndef NETSNMP_DISABLE_DEBUGGING
" -D[TOKEN[,...]]\tturn on debugging output for the given TOKEN(s)\n"
"\t\t\t (try ALL for extremely verbose output)\n"
"\t\t\t Don't put space(s) between -D and TOKEN(s).\n"
#endif
" -f\t\t\tdo not fork from the shell\n",
#ifdef HAVE_UNISTD_H
" -g GID\t\tchange to this numeric gid after opening\n"
"\t\t\t transport endpoints\n"
#endif
" -h, --help\t\tdisplay this usage message\n"
" -H\t\t\tdisplay configuration file directives understood\n"
" -I [-]INITLIST\tlist of mib modules to initialize (or not)\n"
"\t\t\t (run snmpd with -Dmib_init for a list)\n"
" -L <LOGOPTS>\t\ttoggle options controlling where to log to\n");
snmp_log_options_usage("\t", stdout);
printf(" -m MIBLIST\t\tuse MIBLIST instead of the default MIB list\n"
" -M DIRLIST\t\tuse DIRLIST as the list of locations to look for MIBs\n"
"\t\t\t (default %s)\n%s%s",
#ifndef NETSNMP_DISABLE_MIB_LOADING
netsnmp_get_mib_directory(),
#else
"MIBs not loaded",
#endif
" -p FILE\t\tstore process id in FILE\n"
" -q\t\t\tprint information in a more parsable format\n"
" -r\t\t\tdo not exit if files only accessible to root\n"
"\t\t\t cannot be opened\n"
#ifdef WIN32SERVICE
" -register\t\tregister as a Windows service\n"
" \t\t\t (followed by -quiet to prevent message popups)\n"
" \t\t\t (followed by the startup parameter list)\n"
" \t\t\t Note that some parameters are not relevant when running as a service\n"
#endif
#ifdef HAVE_UNISTD_H
" -u UID\t\tchange to this uid (numeric or textual) after\n"
"\t\t\t opening transport endpoints\n"
#endif
#ifdef WIN32SERVICE
" -unregister\t\tunregister as a Windows service\n"
" \t\t\t (followed -quiet to prevent message popups)\n"
#endif
" -v, --version\t\tdisplay version information\n"
" -V\t\t\tverbose display\n"
#if defined(USING_AGENTX_SUBAGENT_MODULE)|| defined(USING_AGENTX_MASTER_MODULE)
" -x ADDRESS\t\tuse ADDRESS as AgentX address\n"
#endif
#ifdef USING_AGENTX_SUBAGENT_MODULE
" -X\t\t\trun as an AgentX subagent rather than as an\n"
"\t\t\t SNMP master agent\n"
#endif
,
"\nDeprecated options:\n"
" -l FILE\t\tuse -Lf <FILE> instead\n"
" -P\t\t\tuse -p instead\n"
" -s\t\t\tuse -Lsd instead\n"
" -S d|i|0-7\t\tuse -Ls <facility> instead\n"
"\n"
);
SOCK_CLEANUP;
exit(1);
}
static void
version(void)
{
printf("\nNET-SNMP version: %s\n"
"Web: http://www.net-snmp.org/\n"
"Email: net-snmp-coders@lists.sourceforge.net\n\n",
netsnmp_get_version());
}
RETSIGTYPE
SnmpdShutDown(int a)
{
netsnmp_running = 0;
#ifdef WIN32SERVICE
/*
* In case of windows, select() in receive() function will not return
* on signal. Thats why following function is called, which closes the
* socket descriptors and causes the select() to return
*/
snmp_close(main_session);
#endif
}
#ifdef SIGHUP
RETSIGTYPE
SnmpdReconfig(int a)
{
reconfig = 1;
signal(SIGHUP, SnmpdReconfig);
}
#endif
#ifdef SIGUSR1
RETSIGTYPE
SnmpdDump(int a)
{
dump_registry();
signal(SIGUSR1, SnmpdDump);
}
#endif
RETSIGTYPE
SnmpdCatchRandomSignal(int a)
{
/* Disable all logs and log the error via syslog */
snmp_disable_log();
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
snmp_enable_syslog();
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
snmp_log(LOG_ERR, "Exiting on signal %d\n", a);
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
snmp_disable_syslog();
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
exit(1);
}
static void
SnmpTrapNodeDown(void)
{
send_easy_trap(SNMP_TRAP_ENTERPRISESPECIFIC, 2);
/*
* XXX 2 - Node Down #define it as NODE_DOWN_TRAP
*/
}
/*******************************************************************-o-******
* main - Non Windows
* SnmpDaemonMain - Windows to support windows service
*
* Parameters:
* argc
* *argv[]
*
* Returns:
* 0 Always succeeds. (?)
*
*
* Setup and start the agent daemon.
*
* Also successfully EXITs with zero for some options.
*/
#ifdef WIN32SERVICE
static int
SnmpDaemonMain(int argc, TCHAR * argv[])
#else
int
main(int argc, char *argv[])
#endif
{
static const char options[] = "aAc:CdD::fhHI:l:L:m:M:n:p:P:qrsS:UvV-:Y:"
#ifdef HAVE_UNISTD_H
"g:u:"
#endif
#if defined(USING_AGENTX_SUBAGENT_MODULE)|| defined(USING_AGENTX_MASTER_MODULE)
"x:"
#endif
#ifdef USING_AGENTX_SUBAGENT_MODULE
"X"
#endif
;
int arg, i, ret, exit_code = 1;
int dont_fork = 0, do_help = 0;
int log_set = 0;
int agent_mode = -1;
char *pid_file = NULL;
char option_compatability[] = "-Le";
#ifndef WIN32
int prepared_sockets = 0;
#endif
#ifdef HAVE_GETPID
int fd;
FILE *PID;
#endif
SOCK_STARTUP;
#ifndef NETSNMP_NO_SYSTEMD
/* check if systemd has sockets for us and don't close them */
prepared_sockets = netsnmp_sd_listen_fds(0);
#endif /* NETSNMP_NO_SYSTEMD */
#ifndef WIN32
/*
* close all non-standard file descriptors we may have
* inherited from the shell.
*/
if (!prepared_sockets)
netsnmp_close_fds(2);
#endif
/*
* register signals ASAP to prevent default action (usually core)
* for signals during startup...
*/
#ifdef SIGTERM
DEBUGMSGTL(("signal", "registering SIGTERM signal handler\n"));
signal(SIGTERM, SnmpdShutDown);
#endif
#ifdef SIGINT
DEBUGMSGTL(("signal", "registering SIGINT signal handler\n"));
signal(SIGINT, SnmpdShutDown);
#endif
#ifdef SIGHUP
signal(SIGHUP, SIG_IGN); /* do not terminate on early SIGHUP */
#endif
#ifdef SIGUSR1
DEBUGMSGTL(("signal", "registering SIGUSR1 signal handler\n"));
signal(SIGUSR1, SnmpdDump);
#endif
#ifdef SIGPIPE
DEBUGMSGTL(("signal", "registering SIGPIPE signal handler\n"));
signal(SIGPIPE, SIG_IGN); /* 'Inline' failure of wayward readers */
#endif
#ifdef SIGXFSZ
signal(SIGXFSZ, SnmpdCatchRandomSignal);
#endif
#ifdef NETSNMP_NO_ROOT_ACCESS
/*
* Default to no.
*/
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS, 1);
#endif
/*
* Default to NOT running an AgentX master.
*/
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_MASTER, 0);
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_TIMEOUT, -1);
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_RETRIES, -1);
netsnmp_ds_set_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_CACHE_TIMEOUT, 5);
/*
* This is incredibly ugly, but it's probably the simplest way
* to handle the old '-L' option as well as the new '-Lx' style
*/
for (i=0; i<argc; i++) {
if (!strcmp(argv[i], "-L"))
argv[i] = option_compatability;
}
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
#ifdef WIN32
snmp_log_syslogname(app_name_long);
#else
snmp_log_syslogname(app_name);
#endif
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPTYPE, app_name);
/*
* Now process options normally.
*/
while ((arg = getopt(argc, argv, options)) != EOF) {
switch (arg) {
case '-':
if (strcasecmp(optarg, "help") == 0) {
usage(argv[0]);
}
if (strcasecmp(optarg, "version") == 0) {
version();
exit_code = 0;
goto out;
}
handle_long_opt(optarg);
break;
case 'a':
log_addresses++;
break;
case 'A':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES, 1);
break;
case 'c':
if (optarg != NULL) {
netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_OPTIONALCONFIG, optarg);
} else {
usage(argv[0]);
}
break;
case 'C':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_DONT_READ_CONFIGS, 1);
break;
case 'd':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_DUMP_PACKET,
++snmp_dump_packet);
break;
case 'D':
#ifdef NETSNMP_DISABLE_DEBUGGING
fprintf(stderr, "Debugging not configured\n");
goto out;
#else
debug_register_tokens(optarg);
snmp_set_do_debugging(1);
#endif
break;
case 'f':
dont_fork = 1;
break;
#ifdef HAVE_UNISTD_H
case 'g':
if (optarg != NULL) {
char *ecp;
int gid;
gid = strtoul(optarg, &ecp, 10);
#if defined(HAVE_GETGRNAM) && defined(HAVE_PWD_H)
if (*ecp) {
struct group *info;
info = getgrnam(optarg);
gid = info ? info->gr_gid : -1;
endgrent();
}
#endif
if (gid < 0) {
fprintf(stderr, "Bad group id: %s\n", optarg);
goto out;
}
netsnmp_set_agent_group_id(gid);
} else {
usage(argv[0]);
}
break;
#endif
case 'h':
usage(argv[0]);
break;
case 'H':
do_help = 1;
break;
case 'I':
if (optarg != NULL) {
add_to_init_list(optarg);
} else {
usage(argv[0]);
}
break;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_FILE
case 'l':
printf("Warning: -l option is deprecated, use -Lf <file> instead\n");
if (optarg != NULL) {
if (strlen(optarg) > PATH_MAX) {
fprintf(stderr,
"%s: logfile path too long (limit %d chars)\n",
argv[0], PATH_MAX);
goto out;
}
snmp_enable_filelog(optarg,
netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES));
log_set = 1;
} else {
usage(argv[0]);
}
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_FILE */
case 'L':
if (snmp_log_options( optarg, argc, argv ) < 0 ) {
usage(argv[0]);
}
log_set = 1;
break;
case 'm':
if (optarg != NULL) {
setenv("MIBS", optarg, 1);
} else {
usage(argv[0]);
}
break;
case 'M':
if (optarg != NULL) {
setenv("MIBDIRS", optarg, 1);
} else {
usage(argv[0]);
}
break;
case 'n':
if (optarg != NULL) {
app_name = optarg;
netsnmp_ds_set_string(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPTYPE, app_name);
} else {
usage(argv[0]);
}
break;
case 'P':
printf("Warning: -P option is deprecated, use -p instead\n");
NETSNMP_FALLTHROUGH;
case 'p':
if (optarg != NULL) {
pid_file = optarg;
} else {
usage(argv[0]);
}
break;
case 'q':
netsnmp_ds_set_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_QUICK_PRINT, 1);
break;
case 'r':
netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS);
break;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
case 's':
printf("Warning: -s option is deprecated, use -Lsd instead\n");
snmp_enable_syslog();
log_set = 1;
break;
case 'S':
printf("Warning: -S option is deprecated, use -Ls <facility> instead\n");
if (optarg != NULL) {
switch (*optarg) {
case 'd':
case 'D':
Facility = LOG_DAEMON;
break;
case 'i':
case 'I':
Facility = LOG_INFO;
break;
case '0':
Facility = LOG_LOCAL0;
break;
case '1':
Facility = LOG_LOCAL1;
break;
case '2':
Facility = LOG_LOCAL2;
break;
case '3':
Facility = LOG_LOCAL3;
break;
case '4':
Facility = LOG_LOCAL4;
break;
case '5':
Facility = LOG_LOCAL5;
break;
case '6':
Facility = LOG_LOCAL6;
break;
case '7':
Facility = LOG_LOCAL7;
break;
default:
fprintf(stderr, "invalid syslog facility: -S%c\n",*optarg);
usage(argv[0]);
}
snmp_enable_syslog_ident(snmp_log_syslogname(NULL), Facility);
log_set = 1;
} else {
fprintf(stderr, "no syslog facility specified\n");
usage(argv[0]);
}
break;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
case 'U':
netsnmp_ds_toggle_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_LEAVE_PIDFILE);
break;
#ifdef HAVE_UNISTD_H
case 'u':
if (optarg != NULL) {
char *ecp;
int uid;
uid = strtoul(optarg, &ecp, 10);
#if defined(HAVE_GETPWNAM) && defined(HAVE_PWD_H)
if (*ecp) {
struct passwd *info;
info = getpwnam(optarg);
uid = info ? info->pw_uid : -1;
endpwent();
}
#endif
if (uid < 0) {
fprintf(stderr, "Bad user id: %s\n", optarg);
goto out;
}
netsnmp_set_agent_user_id(uid);
} else {
usage(argv[0]);
}
break;
#endif
case 'v':
version();
exit_code = 0;
goto out;
case 'V':
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_VERBOSE, 1);
break;
#if defined(USING_AGENTX_SUBAGENT_MODULE)|| defined(USING_AGENTX_MASTER_MODULE)
case 'x':
if (optarg != NULL) {
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_X_SOCKET, optarg);
} else {
usage(argv[0]);
}
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_AGENTX_MASTER, 1);
break;
#endif
case 'X':
#if defined(USING_AGENTX_SUBAGENT_MODULE)
agent_mode = SUB_AGENT;
#else
fprintf(stderr, "%s: Illegal argument -X:"
"AgentX support not compiled in.\n", argv[0]);
usage(argv[0]);
#endif
break;
case 'Y':
netsnmp_config_remember(optarg);
break;
default:
usage(argv[0]);
break;
}
}
if (do_help) {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS, 1);
init_agent(app_name); /* register our .conf handlers */
init_mib_modules();
init_snmp(app_name);
fprintf(stderr, "Configuration directives understood:\n");
read_config_print_usage(" ");
exit_code = 0;
goto out;
}
if (optind < argc) {
#ifndef NETSNMP_NO_LISTEN_SUPPORT
/*
* There are optional transport addresses on the command line.
*/
DEBUGMSGTL(("snmpd/main", "optind %d, argc %d\n", optind, argc));
for (i = optind; i < argc; i++) {
char *c, *astring;
if ((c = netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS))) {
astring = (char*)malloc(strlen(c) + 2 + strlen(argv[i]));
if (astring == NULL) {
fprintf(stderr, "malloc failure processing argv[%d]\n", i);
goto out;
}
sprintf(astring, "%s,%s", c, argv[i]);
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS, astring);
SNMP_FREE(astring);
} else {
netsnmp_ds_set_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS, argv[i]);
}
}
DEBUGMSGTL(("snmpd/main", "port spec: %s\n",
netsnmp_ds_get_string(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_PORTS)));
#else /* NETSNMP_NO_LISTEN_SUPPORT */
fprintf(stderr, "You specified ports to open; this agent was built to only send notifications\n");
goto out;
#endif /* NETSNMP_NO_LISTEN_SUPPORT */
}
#if defined(NETSNMP_DAEMONS_DEFAULT_LOG_SYSLOG)
if (0 == log_set)
snmp_enable_syslog();
#else
#ifdef NETSNMP_LOGFILE
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_FILE
if (0 == log_set)
snmp_enable_filelog(NETSNMP_LOGFILE,
netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES));
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_FILE */
#endif /* NETSNMP_LOGFILE */
#endif /* ! NETSNMP_DEFAULT_LOG_SYSLOG */
#ifdef USING_UTIL_FUNCS_RESTART_MODULE
{
/*
* Initialize a argv set to the current for restarting the agent.
*/
char *cptr, **argvptr;
argvrestartp = (char **)malloc((argc + 2) * sizeof(char *));
argvptr = argvrestartp;
for (i = 0, ret = 1; i < argc; i++) {
ret += strlen(argv[i]) + 1;
}
argvrestart = (char *) malloc(ret);
argvrestartname = (char *) malloc(strlen(argv[0]) + 1);
if (!argvrestartp || !argvrestart || !argvrestartname) {
fprintf(stderr, "malloc failure processing argvrestart\n");
goto out;
}
strcpy(argvrestartname, argv[0]);
for (cptr = argvrestart, i = 0; i < argc; i++) {
strcpy(cptr, argv[i]);
*(argvptr++) = cptr;
cptr += strlen(argv[i]) + 1;
}
}
#endif /* USING_UTIL_FUNCS_RESTART_MODULE */
if (agent_mode == -1) {
if (strstr(argv[0], "agentxd") != NULL) {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE, SUB_AGENT);
} else {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE, MASTER_AGENT);
}
} else {
netsnmp_ds_set_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_ROLE, agent_mode);
}
if (init_agent(app_name) != 0) {
snmp_log(LOG_ERR, "Agent initialization failed\n");
goto out;
}
init_mib_modules();
/*
* start library
*/
init_snmp(app_name);
if ((ret = init_master_agent()) != 0) {
/*
* Some error opening one of the specified agent transports.
*/
snmp_log(LOG_ERR, "Server Exiting with code 1\n");
goto out;
}
/*
* Initialize the world. Detach from the shell. Create initial user.
*/
if(!dont_fork) {
int quit = ! netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_QUIT_IMMEDIATELY);
ret = netsnmp_daemonize(quit,
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_STDIO
snmp_stderrlog_status()
#else /* NETSNMP_FEATURE_REMOVE_LOGGING_STDIO */
0
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_STDIO */
);
/*
* xxx-rks: do we care if fork fails? I think we should...
*/
if(ret != 0) {
snmp_log(LOG_ERR, "Server Exiting with code 1\n");
goto out;
}
}
#ifdef HAVE_GETPID
if (pid_file != NULL) {
/*
* unlink the pid_file, if it exists, prior to open. Without
* doing this the open will fail if the user specified pid_file
* already exists.
*/
unlink(pid_file);
fd = open(pid_file, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd == -1) {
snmp_log_perror(pid_file);
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
goto out;
}
} else {
if ((PID = fdopen(fd, "w")) == NULL) {
close(fd);
snmp_log_perror(pid_file);
goto out;
} else {
fprintf(PID, "%d\n", (int) getpid());
fclose(PID);
}
}
}
#endif
#if defined(HAVE_UNISTD_H) && (defined(HAVE_CHOWN) || defined(HAVE_SETGID) || defined(HAVE_SETUID))
{
const char *persistent_dir;
int uid, gid;
persistent_dir = get_persistent_directory();
mkdirhier( persistent_dir, NETSNMP_AGENT_DIRECTORY_MODE, 0 );
uid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_USERID);
gid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID);
#ifdef HAVE_CHOWN
if ( uid != 0 || gid != 0 )
NETSNMP_IGNORE_RESULT(chown(persistent_dir, uid, gid));
#endif
#ifdef HAVE_SETGID
if ((gid = netsnmp_ds_get_int(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_GROUPID)) > 0) {
DEBUGMSGTL(("snmpd/main", "Changing gid to %d.\n", gid));
if (setgid(gid) == -1
#ifdef HAVE_SETGROUPS
|| setgroups(1, (gid_t *)&gid) == -1
#endif
) {
snmp_log_perror("setgid failed");
if (!netsnmp_ds_get_boolean(NETSNMP_DS_APPLICATION_ID,
NETSNMP_DS_AGENT_NO_ROOT_ACCESS)) {
goto out;
}