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Ping the service manager and set a status message

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Periodically "ping" the service manager (every 3 seconds) and set a
status message showing connection statistics.

This enables using the systemd(8) watchdog functionality for the
"ngircd.service" unit.
This commit is contained in:
Alexander Barton 2024-04-05 22:48:22 +02:00
parent e4873b4d63
commit 791778d7b6
4 changed files with 34 additions and 3 deletions
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3
contrib/ngircd.service
View File

@ -37,6 +37,9 @@ EnvironmentFile=-/etc/default/ngircd-full-dbg
# Start ngIRCd. Note: systemd doesn't allow to use $DAEMON here!
ExecStart=/usr/sbin/ngircd --nodaemon --syslog $PARAMS
ExecReload=/bin/kill -HUP $MAINPID
# Error handling:
# ngIRCd tries to "ping" the service manager every 3 seconds.
WatchdogSec=10
Restart=on-failure
[Install]

18
src/ngircd/conn.c
View File

@ -669,8 +669,9 @@ Conn_Handler(void)
int i;
size_t wdatalen;
struct timeval tv;
time_t t;
time_t t, notify_t = 0;
bool command_available;
char status[200];
Log(LOG_NOTICE, "Server \"%s\" (on \"%s\") ready.",
Client_ID(Client_ThisServer()), Client_Hostname(Client_ThisServer()));
@ -783,13 +784,24 @@ Conn_Handler(void)
exit(1);
}
/* Should ngIRCd timeout when idle? */
t = time(NULL);
if (Conf_IdleTimeout > 0 && NumConnectionsAccepted > 0
&& idle_t > 0 && time(NULL) - idle_t >= Conf_IdleTimeout) {
&& idle_t > 0 && t - idle_t >= Conf_IdleTimeout) {
/* Should ngIRCd timeout when idle? */
LogDebug("Server idle timeout reached: %d second%s. Initiating shutdown ...",
Conf_IdleTimeout,
Conf_IdleTimeout == 1 ? "" : "s");
NGIRCd_SignalQuit = true;
} else if (Signal_NotifySvcMgr_Possible() && t - notify_t > 3) {
/* Send the current status to the service manager. */
snprintf(status, sizeof(status),
"WATCHDOG=1\nSTATUS=%ld connection%s established (%ld user%s, %ld server%s), %ld maximum. %ld accepted in total.\n",
NumConnections, NumConnections == 1 ? "" : "s",
Client_MyUserCount(), Client_MyUserCount() == 1 ? "" : "s",
Client_MyServerCount(), Client_MyServerCount() == 1 ? "" : "s",
NumConnectionsMax, NumConnectionsAccepted);
Signal_NotifySvcMgr(status);
notify_t = t;
}
}

15
src/ngircd/sighandlers.c
View File

@ -348,6 +348,21 @@ Signals_Exit(void)
signalpipe[0] = signalpipe[1] = 0;
}
/**
* Check if the service manager of the system can be notified.
*
* @returns true if notifying the service manager is theoretically possible.
*/
GLOBAL bool
Signal_NotifySvcMgr_Possible(void)
{
#if !defined(HAVE_SYS_UN_H) || !defined(SOCK_CLOEXEC)
return false;
#else
return getenv("NOTIFY_SOCKET") != NULL;
#endif
}
/**
* Notify the service manager using the "sd_notify" protocol.
*

1
src/ngircd/sighandlers.h
View File

@ -22,6 +22,7 @@
bool Signals_Init PARAMS((void));
void Signals_Exit PARAMS((void));
GLOBAL bool Signal_NotifySvcMgr_Possible PARAMS((void));
GLOBAL void Signal_NotifySvcMgr PARAMS((const char *message));
#endif