Logs: no ODBC user and password in messages about a log

A log string is shown only up to its first comma, where an ODBC string
goes on with the user and the password: in the message on a log which
failed, and in the errors on a log or -l which cannot be opened.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/conf.c

@@ -388,7 +388,9 @@ static int h_log(int argc, unsigned char ** argv){
 	/* the same log as before is not opened again */
 	lg = logget((argc > 1)? argv[1] : (unsigned char *)"", rotation);
 	if(!lg){
-		perror((argc > 1)? (char *)argv[1] : "log");
+		fprintf(stderr, "Unable to open log %.*s: %s, line %d\n",
+			(int)logselen((argc > 1)? argv[1] : (unsigned char *)""),
+			(argc > 1)? (char *)argv[1] : "", strerror(errno), linenum);
 		return 1;
 	}
 	if(conf->stacksize < lg->type->stacksize) conf->stacksize = lg->type->stacksize;

src/log.c

@@ -808,6 +808,14 @@ static void logfallback(struct logger *lg, struct clientparam *param, const unsi
 	logput(to);
 }
 
+/* The part of a log string fit to be shown: up to a comma, an ODBC string
+   going on with the user and the password, and at most 200 bytes. */
+size_t logselen(const unsigned char *selector){
+	size_t len = strcspn((char *)selector, ",");
+
+	return len > 200? 200 : len;
+}
+
 static void logwrite(struct logger *lg, struct clientparam *param, const unsigned char *buf, int len){
 	int res = 0, failed, report = 0;
 	time_t t;
@@ -838,7 +846,8 @@ static void logwrite(struct logger *lg, struct clientparam *param, const unsigne
 	if(report){
 		unsigned char msg[300];
 
-		sprintf((char *)msg, "Log %.200s failed, its lines go to the error log", lg->selector);
+		/* up to a comma: an ODBC string goes on with user and password */
+		sprintf((char *)msg, "Log %.*s failed, its lines go to the error log", (int)logselen(lg->selector), lg->selector);
 		logerror(msg);
 	}
 }

src/mainconf.c

@@ -322,7 +322,8 @@ static int srvprepare(struct srvstart *s, int argc, char **argv){
 				/* the same log the log command, or another service,
 				   opened is shared with it */
 				if(!(lg = logget((unsigned char *)argv[i] + 2, NONE))){
-					perror(argv[i] + 2);
+					fprintf(stderr, "Unable to open log %.*s: %s\n",
+						(int)logselen((unsigned char *)argv[i] + 2), argv[i] + 2, strerror(errno));
 					return 1;
 				}
 				logput(srv->logger);

src/proxy.h

@@ -352,6 +352,7 @@ void logput(struct logger *lg);
 void logcommit(struct extparam *c);
 void logerrset(struct logger *lg);
 void logstdclose(void);
+size_t logselen(const unsigned char *selector);
 void logtick(time_t t);
 void logfinish(void);
 int timechanged (time_t oldtime, time_t newtime, ROTATION lt);