On Sun Nov 01, 2026 at 08:12:23PM +0100, Claudio Jeker wrote:
> On Sun, Nov 01, 2026 at 06:59:48PM +0100, Rafael Sadowski wrote:
> > I don't suppose anyone has ever tried to debug their error logs.
> 
> I did but I normally have a no other traffic to worry about. Also I only
> did this live.
>  
> > This diff changes the log from:
> > 
> > error.cgi: lab test error, GET /cgi-bin/error.cgi
> > 
> > to:
> > 
> > 01/Nov/2026:18:53:55 +0100: error.cgi: lab test error, GET /cgi-bin/error.cgi
> > 
> > Does anyone have a better idea for a syntax? OK?
> 
> I prefer ISO format for timestamps like used by syslogd -Z.
> Timestamps are certainly useful for non syslog logging.

Thanks for the feedback, sure. With the diff below, it looks like this:

2026-11-01T20:40:20: error.cgi: lab test error, GET /cgi-bin/error.cgi

commit cc7e31596c708775558a0b857170bb94fce407d0
Author: Rafael Sadowski <rafael@sizeofvoid.org>
Date:   Sun Nov 1 15:18:04 2026 +0100

    httpd: add timestamps to fastcgi error log

diff --git a/httpd.h b/httpd.h
index 1e54479..a3f290f 100644
--- a/httpd.h
+++ b/httpd.h
@@ -695,6 +695,7 @@ struct server_config	*serverconfig_byid(uint32_t);
 int			 server_foreach(int (*)(struct server *,
 	struct server_config *, void *), void *);
 struct server		*server_match(struct server *, int);
+int			 server_log_time(char *buf, size_t len, const char *);
 
 SPLAY_PROTOTYPE(client_tree, client, clt_nodes, server_client_cmp);
 
diff --git a/server.c b/server.c
index 9975a1c..750e9ca 100644
--- a/server.c
+++ b/server.c
@@ -1541,4 +1541,21 @@ server_client_cmp(struct client *a, struct client *b)
 	return ((int)a->clt_id - b->clt_id);
 }
 
+int
+server_log_time(char *buf, size_t len, const char *format)
+{
+	time_t		 t;
+	struct tm	 tm;
+
+	if ((t = time(NULL)) == -1)
+		return (-1);
+	if (localtime_r(&t, &tm) == NULL)
+		return (-1);
+	if (strftime(buf, len,
+	    format == NULL ? "%d/%b/%Y:%H:%M:%S %z" : format, &tm) == 0)
+		return (-1);
+
+	return (0);
+}
+
 SPLAY_GENERATE(client_tree, client, clt_nodes, server_client_cmp);
diff --git a/server_fcgi.c b/server_fcgi.c
index 2428adb..64570cd 100644
--- a/server_fcgi.c
+++ b/server_fcgi.c
@@ -85,6 +85,7 @@ int	server_fcgi_writechunk(struct client *);
 int	server_fcgi_getheaders(struct client *);
 int	fcgi_add_param(struct server_fcgi_param *, const char *, const char *,
     struct client *);
+void	server_fcgi_err_log(struct client *);
 
 int
 server_fcgi(struct httpd *env, struct client *clt)
@@ -512,6 +513,32 @@ server_fcgi_error(struct bufferevent *bev, short error, void *arg)
 	server_file_error(bev, error, arg);
 }
 
+void
+server_fcgi_err_log(struct client *clt)
+{
+	char				 tstamp[33];
+	struct server_config		*srv_conf;
+	size_t				 len;
+	char				*msg;
+
+	if ((srv_conf = clt->clt_srv_conf) == NULL)
+		return;
+
+	if ((len = EVBUFFER_LENGTH(clt->clt_srvevb)) == 0)
+		return;
+
+	if ((msg = get_string(EVBUFFER_DATA(clt->clt_srvevb), len)) == NULL)
+		return;
+
+	if ((srv_conf->flags & SRVFLAG_SYSLOG) == 0 &&
+	    server_log_time(tstamp, sizeof(tstamp), "%FT%T") == 0) {
+		server_sendlog(srv_conf, IMSG_LOG_ERROR, "%s: %s", tstamp, msg);
+	} else {
+		server_sendlog(srv_conf, IMSG_LOG_ERROR, "%s", msg);
+	}
+	free(msg);
+}
+
 void
 server_fcgi_read(struct bufferevent *bev, void *arg)
 {
@@ -519,7 +546,6 @@ server_fcgi_read(struct bufferevent *bev, void *arg)
 	struct client			*clt = (struct client *)arg;
 	struct fcgi_record_header	*h;
 	size_t				 len;
-	char				*ptr;
 
 	do {
 		len = bufferevent_read(bev, buf, clt->clt_fcgi.toread);
@@ -561,15 +587,7 @@ server_fcgi_read(struct bufferevent *bev, void *arg)
 		case FCGI_READ_CONTENT:
 			switch (clt->clt_fcgi.type) {
 			case FCGI_STDERR:
-				if (EVBUFFER_LENGTH(clt->clt_srvevb) > 0 &&
-				    (ptr = get_string(
-				     EVBUFFER_DATA(clt->clt_srvevb),
-				     EVBUFFER_LENGTH(clt->clt_srvevb))) !=
-				    NULL) {
-					server_sendlog(clt->clt_srv_conf,
-					    IMSG_LOG_ERROR, "%s", ptr);
-					free(ptr);
-				}
+				server_fcgi_err_log(clt);
 				break;
 			case FCGI_STDOUT:
 				++clt->clt_chunk;
diff --git a/server_http.c b/server_http.c
index 2c4bb74..bc7e90c 100644
--- a/server_http.c
+++ b/server_http.c
@@ -2042,13 +2042,11 @@ replace_var(char *str, const char *var, const char *repl)
 int
 server_log_http(struct client *clt, unsigned int code, size_t len)
 {
-	static char		 tstamp[64];
 	static char		 ip[INET6_ADDRSTRLEN];
-	time_t			 t;
 	struct kv		 key, *agent, *referrer, *xff, *xfp;
-	struct tm		*tm;
 	struct server_config	*srv_conf;
 	struct http_descriptor	*desc;
+	char			 tstamp[64];
 	int			 ret = -1;
 	char			*user = NULL;
 	char			*path = NULL;
@@ -2065,11 +2063,7 @@ server_log_http(struct client *clt, unsigned int code, size_t len)
 	if ((desc = clt->clt_descreq) == NULL)
 		return (-1);
 
-	if ((t = time(NULL)) == -1)
-		return (-1);
-	if ((tm = localtime(&t)) == NULL)
-		return (-1);
-	if (strftime(tstamp, sizeof(tstamp), "%d/%b/%Y:%H:%M:%S %z", tm) == 0)
+	if (server_log_time(tstamp, sizeof(tstamp), NULL) == -1)
 		return (-1);
 
 	if (print_host(&clt->clt_ss, ip, sizeof(ip)) == NULL)