Attachment #32580 for bug #57685

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{
    int sd;
    int connect_tries;
    int connect_errno;
    apr_interval_time_t sliding_timer;

    connect_tries = 0;
    sliding_timer = 100000; /* 100 milliseconds */
    while (1) {
        connect_errno = 0;
        ++connect_tries;
        if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
            return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno,
                                   APLOGNO(01255) "unable to create socket to cgi daemon");
        }
        if (connect(sd, (struct sockaddr *)server_addr, server_addr_len) < 0) {
            /* Save errno for later */
            connect_errno = errno;
            /* ECONNREFUSED means the listen queue is full; ENOENT means that
             * the cgid server either hasn't started up yet, or we're pointing
             * at the wrong socket file */
            if ((errno == ECONNREFUSED || errno == ENOENT)
                && connect_tries < DEFAULT_CONNECT_ATTEMPTS) {
                ap_log_rerror(APLOG_MARK, APLOG_DEBUG, errno, r, APLOGNO(01256)
                              "connect #%d to cgi daemon failed, sleeping before retry",
                              connect_tries);

                                      close_unix_socket, apr_pool_cleanup_null);
            break; /* we got connected! */
        }

        /* gotta try again, but make sure the cgid daemon is still around */
        if (connect_errno != ENOENT && kill(daemon_pid, 0) != 0) {
            return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO(01258)
                                   "cgid daemon is gone; is Apache terminating?");
        }

        /* If we didn't find the socket but we started the server long ago,
         * chances are there's something wrong with the cgid daemon
         * XXX: Hardcoded number alert */
        if (connect_errno == ENOENT &&
                apr_time_sec(apr_time_now() - ap_scoreboard_image->global->restart_time) > 60) {
            return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO()
                                   "the unix socket file is gone or was never created");
        }
    }
    *sdptr = sd;
    return OK;

Return to bug 57685

Lines 1203-1220 static int connect_to_daemon(int sdptr, request_rec r, Link Here

(-)a/modules/generators/mod_cgid.c (-3 / +21 lines)
1203	{	1203	{
1204	int sd;	1204	int sd;
1205	int connect_tries;	1205	int connect_tries;
		1206	int connect_errno;
1206	apr_interval_time_t sliding_timer;	1207	apr_interval_time_t sliding_timer;
1207		1208
1208	connect_tries = 0;	1209	connect_tries = 0;
1209	sliding_timer = 100000; /* 100 milliseconds */	1210	sliding_timer = 100000; /* 100 milliseconds */
1210	while (1) {	1211	while (1) {
		1212	connect_errno = 0;
1211	++connect_tries;	1213	++connect_tries;
1212	if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {	1214	if ((sd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
1213	return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno,	1215	return log_scripterror(r, conf, HTTP_INTERNAL_SERVER_ERROR, errno,
1214	APLOGNO(01255) "unable to create socket to cgi daemon");	1216	APLOGNO(01255) "unable to create socket to cgi daemon");
1215	}	1217	}
1216	if (connect(sd, (struct sockaddr *)server_addr, server_addr_len) < 0) {	1218	if (connect(sd, (struct sockaddr *)server_addr, server_addr_len) < 0) {
1217	if (errno == ECONNREFUSED && connect_tries < DEFAULT_CONNECT_ATTEMPTS) {	1219	/* Save errno for later */
		1220	connect_errno = errno;
		1221	/* ECONNREFUSED means the listen queue is full; ENOENT means that
		1222	* the cgid server either hasn't started up yet, or we're pointing
		1223	* at the wrong socket file */
		1224	if ((errno == ECONNREFUSED \|\| errno == ENOENT)
		1225	&& connect_tries < DEFAULT_CONNECT_ATTEMPTS) {
1218	ap_log_rerror(APLOG_MARK, APLOG_DEBUG, errno, r, APLOGNO(01256)	1226	ap_log_rerror(APLOG_MARK, APLOG_DEBUG, errno, r, APLOGNO(01256)
1219	"connect #%d to cgi daemon failed, sleeping before retry",	1227	"connect #%d to cgi daemon failed, sleeping before retry",
1220	connect_tries);	1228	connect_tries);
Lines 1235-1245 static int connect_to_daemon(int sdptr, request_rec r, Link Here
1235	close_unix_socket, apr_pool_cleanup_null);	1243	close_unix_socket, apr_pool_cleanup_null);
1236	break; /* we got connected! */	1244	break; /* we got connected! */
1237	}	1245	}
		1246
1238	/* gotta try again, but make sure the cgid daemon is still around */	1247	/* gotta try again, but make sure the cgid daemon is still around */
1239	if (kill(daemon_pid, 0) != 0) {	1248	if (connect_errno != ENOENT && kill(daemon_pid, 0) != 0) {
1240	return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, errno, APLOGNO(01258)	1249	return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO(01258)
1241	"cgid daemon is gone; is Apache terminating?");	1250	"cgid daemon is gone; is Apache terminating?");
1242	}	1251	}
		1252
		1253	/* If we didn't find the socket but we started the server long ago,
		1254	* chances are there's something wrong with the cgid daemon
		1255	* XXX: Hardcoded number alert */
		1256	if (connect_errno == ENOENT &&
		1257	apr_time_sec(apr_time_now() - ap_scoreboard_image->global->restart_time) > 60) {
		1258	return log_scripterror(r, conf, HTTP_SERVICE_UNAVAILABLE, connect_errno, APLOGNO()
		1259	"the unix socket file is gone or was never created");
		1260	}
1243	}	1261	}
1244	*sdptr = sd;	1262	*sdptr = sd;
1245	return OK;	1263	return OK;