void
snmp_enable_filelog(const char *logfilename, int dont_zero_log)
{
netsnmp_log_handler *logh;
/*
* don't disable ALL filelogs whenever a new one is enabled.
* this prevents '-Lf file' from working in snmpd, as the
* call to set up /var/log/snmpd.log will disable the previous
* log setup.
* snmp_disable_filelog();
*/
if (logfilename) {
logh = netsnmp_find_loghandler( logfilename );
if (!logh)
logh = netsnmp_register_filelog_handler( logfilename, LOG_DEBUG,
0, dont_zero_log );
else
netsnmp_enable_filelog(logh, dont_zero_log);
} else {
for (logh = logh_head; logh; logh = logh->next)
if (logh->type == NETSNMP_LOGHANDLER_FILE)
netsnmp_enable_filelog(logh, dont_zero_log);
}
}
/*
* close and reopen all file based logs, to allow logfile
* rotation.
*/
void
netsnmp_logging_restart(void)
{
netsnmp_log_handler *logh;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
int doneone = 0;
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
for (logh = logh_head; logh; logh = logh->next) {
if (0 == logh->enabled)
continue;
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG
if (logh->type == NETSNMP_LOGHANDLER_SYSLOG) {
snmp_disable_syslog_entry(logh);
snmp_enable_syslog_ident(logh->token,(int)(intptr_t)logh->magic);
doneone = 1;
}
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_SYSLOG */
#ifndef NETSNMP_FEATURE_REMOVE_LOGGING_FILE
if (logh->type == NETSNMP_LOGHANDLER_FILE && !doneone) {
snmp_disable_filelog_entry(logh);
/** hmm, don't zero status isn't saved.. i think it's
* safer not to overwrite, in case a hup is just to
* re-read config files...
*/
netsnmp_enable_filelog(logh, 1);
}
#endif /* NETSNMP_FEATURE_REMOVE_LOGGING_FILE */
}
}
netsnmp_log_handler *
netsnmp_register_filelog_handler(const char* logfilename, int priority,
int priority_max, int dont_zero_log)
{
netsnmp_log_handler *logh =
netsnmp_register_loghandler(NETSNMP_LOGHANDLER_FILE,
priority );
if (NULL == logh)
return NULL;
logh->pri_max = priority_max;
logh->token = strdup(logfilename);
if (-1 == dont_zero_log)
dont_zero_log = netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES);
netsnmp_enable_filelog(logh, dont_zero_log);
return logh;
}
/*
* close and reopen all file based logs, to allow logfile
* rotation.
*/
void
netsnmp_logging_restart(void)
{
netsnmp_log_handler *logh;
for (logh = logh_head; logh; logh = logh->next) {
if (0 == logh->enabled)
continue;
if (logh->type == NETSNMP_LOGHANDLER_SYSLOG) {
snmp_disable_syslog_entry(logh);
snmp_enable_syslog_ident(logh->token,(int)(intptr_t)logh->magic);
}
else if (logh->type == NETSNMP_LOGHANDLER_FILE) {
snmp_disable_filelog_entry(logh);
/** hmm, don't zero status isn't saved.. i think it's
* safer not to overwrite, in case a hup is just to
* re-read config files...
*/
netsnmp_enable_filelog(logh, 1);
}
}
}
int
snmp_log_options(char *optarg, int argc, char *const *argv)
{
char *cp = optarg;
/*
* Hmmm... this doesn't seem to work.
* The main agent 'getopt' handling assumes
* that the -L option takes an argument,
* and objects if this is missing.
* Trying to differentiate between
* new-style "-Lx", and old-style "-L xx"
* is likely to be a major headache.
*/
char missing_opt = 'e'; /* old -L is new -Le */
int priority = LOG_DEBUG;
int pri_max = LOG_EMERG;
int inc_optind = 0;
netsnmp_log_handler *logh;
optarg++;
if (!*cp)
cp = &missing_opt;
/*
* Support '... -Lx=value ....' syntax
*/
if (*optarg == '=') {
optarg++;
}
/*
* and '.... "-Lx value" ....' (*with* the quotes)
*/
while (*optarg && isspace(*optarg)) {
optarg++;
}
/*
* Finally, handle ".... -Lx value ...." syntax
* (*without* surrounding quotes)
*/
if ((!*optarg) && (NULL != argv)) {
/*
* We've run off the end of the argument
* so move on to the next.
* But we might not actually need it, so don't
* increment optind just yet!
*/
optarg = argv[optind];
inc_optind = 1;
}
switch (*cp) {
/*
* Log to Standard Error
*/
case 'E':
priority = decode_priority( &optarg, &pri_max );
if (priority == -1) return -1;
if (inc_optind)
optind++;
/* Fallthrough */
case 'e':
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_STDERR, priority);
if (logh) {
logh->pri_max = pri_max;
logh->token = strdup("stderr");
}
break;
/*
* Log to Standard Output
*/
case 'O':
priority = decode_priority( &optarg, &pri_max );
if (priority == -1) return -1;
if (inc_optind)
optind++;
/* Fallthrough */
case 'o':
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_STDERR, priority);
if (logh) {
logh->pri_max = pri_max;
logh->token = strdup("stdout");
logh->imagic = 1; /* stdout, not stderr */
}
break;
/*
* Log to a named file
*/
case 'F':
priority = decode_priority( &optarg, &pri_max );
if (priority == -1 || !argv) return -1;
optarg = argv[++optind];
/* Fallthrough */
case 'f':
if (inc_optind)
optind++;
if (!optarg) {
fprintf(stderr, "Missing log file\n");
return -1;
}
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_FILE, priority);
if (logh) {
logh->pri_max = pri_max;
logh->token = strdup(optarg);
netsnmp_enable_filelog(logh,
netsnmp_ds_get_boolean(NETSNMP_DS_LIBRARY_ID,
NETSNMP_DS_LIB_APPEND_LOGFILES));
}
break;
/*
* Log to syslog
*/
case 'S':
priority = decode_priority( &optarg, &pri_max );
if (priority == -1 || !argv) return -1;
if (!optarg[0]) {
/* The command line argument with priority does not contain log
* facility. The facility must be in next argument then. */
optind++;
if (optind < argc)
optarg = argv[optind];
}
/* Fallthrough */
case 's':
if (inc_optind)
optind++;
if (!optarg) {
fprintf(stderr, "Missing syslog facility\n");
return -1;
}
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_SYSLOG, priority);
if (logh) {
int facility = decode_facility(optarg);
if (facility == -1) return -1;
logh->pri_max = pri_max;
logh->token = strdup(snmp_log_syslogname(0));
logh->magic = (void *)(intptr_t)facility;
snmp_enable_syslog_ident(snmp_log_syslogname(0), facility);
}
break;
/*
* Don't log
*/
case 'N':
priority = decode_priority( &optarg, &pri_max );
if (priority == -1) return -1;
if (inc_optind)
optind++;
/* Fallthrough */
case 'n':
/*
* disable all logs to clean them up (close files, etc),
* remove all log handlers, then register a null handler.
*/
snmp_disable_log();
while(NULL != logh_head)
netsnmp_remove_loghandler( logh_head );
logh = netsnmp_register_loghandler(NETSNMP_LOGHANDLER_NONE, priority);
if (logh) {
logh->pri_max = pri_max;
}
break;
default:
fprintf(stderr, "Unknown logging option passed to -L: %c.\n", *cp);
return -1;
}
return 0;
}
