syslog feature.

git-svn-id: file:///svn/unbound/trunk@644 be551aaa-1e26-0410-a405-d3ace91eadb9

Makefile.in

@@ -46,7 +46,7 @@ endif
 BUILD=build/
 
 LINT=splint
-LINTFLAGS=+quiet -weak -warnposix -unrecog -Din_addr_t=uint32_t -Du_int=unsigned -Du_char=uint8_t -preproc -Drlimit=rlimit64
+LINTFLAGS=+quiet -weak -warnposix -unrecog -Din_addr_t=uint32_t -Du_int=unsigned -Du_char=uint8_t -preproc -Drlimit=rlimit64 +posixlib
 # compat with openssl linux edition.
 LINTFLAGS+="-DBN_ULONG=unsigned long" -Dkrb5_int32=int "-Dkrb5_ui_4=unsigned int" -DPQ_64BIT=uint64_t
 

configure.ac

@@ -269,7 +269,7 @@ AC_PROG_LIBTOOL
 
 # Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS([stdarg.h stdbool.h netinet/in.h sys/param.h sys/socket.h sys/uio.h arpa/inet.h],,, [AC_INCLUDES_DEFAULT])
+AC_CHECK_HEADERS([stdarg.h stdbool.h netinet/in.h sys/param.h sys/socket.h sys/uio.h arpa/inet.h syslog.h],,, [AC_INCLUDES_DEFAULT])
 
 # check for types
 AC_CHECK_TYPE(int8_t, char)
@@ -538,7 +538,7 @@ AC_ARG_WITH(ldns,
 
 AC_CHECK_LIB(ldns, ldns_rr_new,, [AC_MSG_ERROR([Can't find ldns library])])
 
-AC_DEFINE_UNQUOTED([MAXSYSLOGMSGLEN], [512], [Define to the maximum message length to pass to syslog.])
+AC_DEFINE_UNQUOTED([MAXSYSLOGMSGLEN], [5120], [Define to the maximum message length to pass to syslog.])
 
 AH_BOTTOM([
 #include <stdio.h>

daemon/unbound.c

@@ -284,7 +284,7 @@ do_chroot(struct daemon* daemon, struct config_file* cfg, int debug_mode)
 	}
 
 	/* init logfile just before fork */
-	log_init(cfg->logfile);
+	log_init(cfg->logfile, cfg->use_syslog);
 	if(!debug_mode && cfg->do_daemonize) {
 		detach(cfg);
 	}
@@ -329,7 +329,7 @@ run_daemon(const char* cfgfile, int cmdline_verbose, int debug_mode)
 		if(!done_chroot) { 
 			do_chroot(daemon, cfg, debug_mode); 
 			done_chroot = 1; 
-		}
+		} else log_init(cfg->logfile, cfg->use_syslog);
 		/* work */
 		daemon_fork(daemon);
 
@@ -366,7 +366,7 @@ main(int argc, char* argv[])
 	/* take debug snapshot of heap */
 	unbound_start_brk = sbrk(0);
 
-	log_init(NULL);
+	log_init(NULL, 0);
 	/* parse the options */
 	while( (c=getopt(argc, argv, "c:dhv")) != -1) {
 		switch(c) {
@@ -396,6 +396,6 @@ main(int argc, char* argv[])
 	}
 
 	run_daemon(cfgfile, cmdline_verbose, debug_mode);
-	log_init(NULL); /* close logfile */
+	log_init(NULL, 0); /* close logfile */
 	return 0;
 }

doc/Changelog

@@ -1,3 +1,7 @@
+26 September 2007: Wouter
+	- SIGHUP will reopen the log file.
+	- Option to log to syslog.
+
 25 September 2007: Wouter
 	- tests for NSEC3. Fixup bitmap checks for NSEC3.
 	- positive ANY response needs to check if wildcard expansion, and

doc/example.conf

@@ -113,8 +113,13 @@ server:
 	# directory: "/etc/unbound"
 
 	# the log file, "" means log to stderr. 
+	# Use of this option sets use-syslog to "no".
 	# logfile: ""
 	
+	# Log to syslog(3) if yes. The log facility LOG_DAEMON is used to 
+	# log to, with identity "unbound". If yes, it overrides the logfile.
+	# use-syslog: yes 
+
 	# the pid file.
 	# pidfile: "unbound.pid"
 	

doc/unbound.conf.5

@@ -39,9 +39,9 @@ example.conf file with all the options.
 # unbound.conf(5) config file for unbound(8).
 server:
 	directory: "/etc/unbound"
-	username: unbound 	# make sure it can write to pidfile, logfile.
+	username: unbound 	# make sure it can write to pidfile.
 	chroot: "/etc/unbound"
-	logfile: "/etc/unbound/unbound.log"
+	# logfile: "/etc/unbound/unbound.log"  #uncomment to use logfile.
 	pidfile: "/etc/unbound/unbound.pid"
 	# verbosity: 1		# uncomment and increase to get more logging.
 .fi
@@ -144,6 +144,13 @@ Sets the working directory for the program.
 If "" is given, logging goes to stderr, or nowhere once daemonized.
 The logfile is appended to, in the following format: 
 [seconds since 1970] unbound[pid:tid]: type: message. 
+If this option is given, the use-syslog is option is set to "no".
+.It \fBuse-syslog:\fR <yes or no>
+Sets unbound to send log messages to the syslogd, using 
+.Xr syslog 3 .
+The log facility LOG_DAEMON is used, with identity "unbound".
+The logfile setting is overridden when use-syslog is turned on.
+The default is to log to syslog.
 .It \fBpidfile:\fR <filename>
 The process id is written to the file. Default is "unbound.pid". So,
 kill -HUP `cat /etc/unbound/unbound.pid` will trigger a reload,

testcode/lock_verify.c

@@ -403,7 +403,7 @@ main(int argc, char* argv[])
 		usage();
 		return 1;
 	}
-	log_init(NULL);
+	log_init(NULL, 0);
 	log_ident_set("lock-verify");
 	/* init */
 	all_locks = rbtree_create(order_lock_cmp);

testcode/signit.c

@@ -236,7 +236,7 @@ process_nsec3(int argc, char* argv[])
 /** main program */
 int main(int argc, char* argv[])
 {
-	log_init(NULL);
+	log_init(NULL, 0);
 	if(argc != 6) {
 		usage();
 	}

testcode/testbound.c

@@ -135,6 +135,7 @@ setup_config(FILE* in, char* configfile, int* lineno,
 	if(!cfg) fatal_exit("could not open %s: %s", 
 			configfile, strerror(errno));
 	line[MAX_LINE_LEN-1] = 0;
+	fprintf(cfg, "server:	use-syslog: no\n");
 	while(fgets(line, MAX_LINE_LEN-1, in)) {
 		parse = line;
 		(*lineno)++;
@@ -204,7 +205,7 @@ main(int argc, char* argv[])
 	char* init_optarg = optarg;
 	struct replay_scenario* scen = NULL;
 
-	log_init(NULL);
+	log_init(NULL, 0);
 	log_info("Start of %s testbound program.", PACKAGE_STRING);
 	/* determine commandline options for the daemon */
 	cfgfile[0] = 0;

testcode/unitmain.c

@@ -205,7 +205,7 @@ infra_test()
 int 
 main(int argc, char* argv[])
 {
-	log_init(NULL);
+	log_init(NULL, 0);
 	if(argc != 1) {
 		printf("usage: %s\n", argv[0]);
 		printf("\tperforms unit tests.\n");

util/config_file.c

@@ -75,6 +75,7 @@ config_create()
 	cfg->do_ip6 = 1;
 	cfg->do_udp = 1;
 	cfg->do_tcp = 1;
+	cfg->use_syslog = 1;
 	cfg->outgoing_base_port = cfg->port + 2000;
 	cfg->outgoing_num_ports = 16;
 	cfg->outgoing_num_tcp = 10;

util/config_file.h

@@ -131,6 +131,9 @@ struct config_file {
 	/** pidfile to write pid to. */
 	char* pidfile;
 
+	/** should log messages be sent to syslogd */
+	int use_syslog;
+
 	/** do not report identity (id.server, hostname.bind) */
 	int hide_identity;
 	/** do not report version (version.server, version.bind) */

util/configlexer.lex

@@ -154,6 +154,7 @@ val-permissive-mode{COLON}	{ YDOUT; return VAR_VAL_PERMISSIVE_MODE;}
 key-cache-size{COLON}	{ YDOUT; return VAR_KEY_CACHE_SIZE;}
 key-cache-slabs{COLON}	{ YDOUT; return VAR_KEY_CACHE_SLABS;}
 val-nsec3-keysize-iterations{COLON}	{ YDOUT; return VAR_VAL_NSEC3_KEYSIZE_ITERATIONS;}
+use-syslog{COLON}	{ YDOUT; return VAR_USE_SYSLOG;}
 {NEWLINE}		{ LEXOUT(("NL\n")); cfg_parser->line++;}
 
 	/* Quoted strings. Strip leading and ending quotes */

util/configparser.y

@@ -84,7 +84,7 @@ extern struct config_parser_state* cfg_parser;
 %token VAR_BOGUS_TTL VAR_VAL_CLEAN_ADDITIONAL VAR_VAL_PERMISSIVE_MODE
 %token VAR_INCOMING_NUM_TCP VAR_MSG_BUFFER_SIZE VAR_KEY_CACHE_SIZE
 %token VAR_KEY_CACHE_SLABS VAR_TRUSTED_KEYS_FILE 
-%token VAR_VAL_NSEC3_KEYSIZE_ITERATIONS
+%token VAR_VAL_NSEC3_KEYSIZE_ITERATIONS VAR_USE_SYSLOG
 
 %%
 toplevelvars: /* empty */ | toplevelvars toplevelvar ;
@@ -122,7 +122,8 @@ content_server: server_num_threads | server_verbosity | server_port |
 	server_val_clean_additional | server_val_permissive_mode |
 	server_incoming_num_tcp | server_msg_buffer_size | 
 	server_key_cache_size | server_key_cache_slabs | 
-	server_trusted_keys_file | server_val_nsec3_keysize_iterations
+	server_trusted_keys_file | server_val_nsec3_keysize_iterations |
+	server_use_syslog
 	;
 stubstart: VAR_STUB_ZONE
 	{
@@ -268,6 +269,20 @@ server_do_tcp: VAR_DO_TCP STRING
 		free($2);
 	}
 	;
+server_use_syslog: VAR_USE_SYSLOG STRING
+	{
+		OUTYY(("P(server_use_syslog:%s)\n", $2));
+		if(strcmp($2, "yes") != 0 && strcmp($2, "no") != 0)
+			yyerror("expected yes or no.");
+		else cfg_parser->cfg->use_syslog = (strcmp($2, "yes")==0);
+#ifndef HAVE_SYSLOG_H
+		if(strcmp($2, "yes") == 0)
+			yyerror("no syslog services are available. "
+				"(reconfigure and compile to add)");
+#endif
+		free($2);
+	}
+	;
 server_chroot: VAR_CHROOT STRING
 	{
 		OUTYY(("P(server_chroot:%s)\n", $2));
@@ -294,6 +309,7 @@ server_logfile: VAR_LOGFILE STRING
 		OUTYY(("P(server_logfile:%s)\n", $2));
 		free(cfg_parser->cfg->logfile);
 		cfg_parser->cfg->logfile = $2;
+		cfg_parser->cfg->use_syslog = 0;
 	}
 	;
 server_pidfile: VAR_PIDFILE STRING

util/log.c

@@ -43,7 +43,19 @@
 #ifdef HAVE_TIME_H
 #include <time.h>
 #endif
+#ifdef HAVE_SYSLOG_H
+#  include <syslog.h>
+#else
+/**define LOG_ constants */
+#  define LOG_CRIT 2
+#  define LOG_ERR 3
+#  define LOG_WARNING 4
+#  define LOG_NOTICE 5
+#  define LOG_INFO 6
+#  define LOG_DEBUG 7
+#endif
 
+/* default verbosity */
 enum verbosity_value verbosity = 4;
 /** the file logged to. */
 static FILE* logfile = 0;
@@ -53,19 +65,36 @@ static int key_created = 0;
 static ub_thread_key_t logkey;
 /** the identity of this executable/process */
 static const char* ident="unbound";
+#ifdef HAVE_SYSLOG_H
+/** are we using syslog(3) to log to */
+static int log_to_syslog = 0;
+#endif /* HAVE_SYSLOG_H */
 
 void
-log_init(const char* filename)
+log_init(const char* filename, int use_syslog)
 {
 	FILE *f;
 	if(!key_created) {
 		key_created = 1;
 		ub_thread_key_create(&logkey, NULL);
 	}
-
+	if(logfile || log_to_syslog)
+		verbose(VERB_DETAIL, "switching log to %s", 
+		use_syslog?"syslog":(filename&&filename[0]?filename:"stderr"));
+	if(logfile && logfile != stderr)
+		fclose(logfile);
+#ifdef HAVE_SYSLOG_H
+	if(log_to_syslog) {
+		closelog();
+		log_to_syslog = 0;
+	}
+	if(use_syslog) {
+		openlog(ident, 0, LOG_DAEMON);
+		log_to_syslog = 1;
+		return;
+	}
+#endif /* HAVE_SYSLOG_H */
 	if(!filename || !filename[0]) {
-		if(logfile && logfile != stderr)
-			fclose(logfile);
 		logfile = stderr;
 		return;
 	}
@@ -76,9 +105,6 @@ log_init(const char* filename)
 			strerror(errno));
 		return;
 	}
-	verbose(VERB_DETAIL, "switching to logfile %s", filename);
-	if(logfile && logfile != stderr)
-		fclose(logfile);
 	logfile = f;
 }
 
@@ -93,14 +119,22 @@ void log_ident_set(const char* id)
 }
 
 void
-log_vmsg(const char* type, const char *format, va_list args)
+log_vmsg(int pri, const char* type,
+	const char *format, va_list args)
 {
-	char message[MAXSYSLOGMSGLEN * 10];
+	char message[MAXSYSLOGMSGLEN];
 	unsigned int* tid = (unsigned int*)ub_thread_key_get(logkey);
+	(void)pri;
 	vsnprintf(message, sizeof(message), format, args);
-	fprintf(logfile, "[%d] %s[%d:%x] %s: %s\n",
-		(int)time(NULL), ident, (int)getpid(), 
-		tid?*tid:0, type, message);
+#ifdef HAVE_SYSLOG_H
+	if(log_to_syslog) {
+		syslog(pri, "[%d:%x] %s: %s", 
+			(int)getpid(), tid?*tid:0, type, message);
+		return;
+	}
+#endif /* HAVE_SYSLOG_H */
+	fprintf(logfile, "[%d] %s[%d:%x] %s: %s\n", (int)time(NULL), 
+		ident, (int)getpid(), tid?*tid:0, type, message);
 	fflush(logfile);
 }
 
@@ -113,7 +147,7 @@ log_info(const char *format, ...)
 {
         va_list args;
 	va_start(args, format);
-	log_vmsg("info", format, args);
+	log_vmsg(LOG_INFO, "info", format, args);
 	va_end(args);
 }
 
@@ -126,7 +160,7 @@ log_err(const char *format, ...)
 {
         va_list args;
 	va_start(args, format);
-	log_vmsg("error", format, args);
+	log_vmsg(LOG_ERR, "error", format, args);
 	va_end(args);
 }
 
@@ -139,7 +173,7 @@ log_warn(const char *format, ...)
 {
         va_list args;
 	va_start(args, format);
-	log_vmsg("warning", format, args);
+	log_vmsg(LOG_WARNING, "warning", format, args);
 	va_end(args);
 }
 
@@ -152,7 +186,7 @@ fatal_exit(const char *format, ...)
 {
         va_list args;
 	va_start(args, format);
-	log_vmsg("fatal error", format, args);
+	log_vmsg(LOG_CRIT, "fatal error", format, args);
 	va_end(args);
 	exit(1);
 }
@@ -167,8 +201,13 @@ verbose(enum verbosity_value level, const char* format, ...)
 {
         va_list args;
 	va_start(args, format);
-	if(verbosity >= level)
-		log_vmsg("note", format, args);
+	if(verbosity >= level) {
+		if(level == VERB_OPS)
+			log_vmsg(LOG_NOTICE, "notice", format, args);
+		else if(level == VERB_DETAIL)
+			log_vmsg(LOG_INFO, "info", format, args);
+		else	log_vmsg(LOG_DEBUG, "debug", format, args);
+	}
 	va_end(args);
 }
 

util/log.h

@@ -77,8 +77,9 @@ void verbose(enum verbosity_value level,
 /**
  * call this to initialize logging services.
  * @param filename: if NULL stderr is used.
+ * @param use_syslog: set to true to ignore filename and use syslog(3).
  */
-void log_init(const char* filename);
+void log_init(const char* filename, int use_syslog);
 
 /**
  * Init a thread (will print this number for the thread log entries).
@@ -133,11 +134,12 @@ void fatal_exit(const char* format, ...) ATTR_FORMAT(printf, 1, 2);
 
 /**
  * va_list argument version of log_info.
+ * @param pri: priority type, for example 5 (INFO).
  * @param type: string to designate type of message (info, error).
  * @param format: the printf style format to print. no newline.
  * @param args: arguments for format string.
  */
-void log_vmsg(const char* type, const char* format, va_list args);
+void log_vmsg(int pri, const char* type, const char* format, va_list args);
 
 /** always assert for now. */
 #define UNBOUND_ASSERT 1