Logging is now configurable. You can define multiple log outputs (to both

files and syslog) and assign lists of message categories to each of them.

doc/bird.conf.example

@@ -4,6 +4,9 @@
 
 # Yet another comment
 
+#log syslog { error };
+#log "tmp" all;
+
 #router id 62.168.0.1;
 
 #define xyzzy = 120+10;

lib/birdlib.h

@@ -44,9 +44,6 @@ void bug(char *msg, ...) NORET;
 #define L_FATAL "\007"			/* Fatal errors */
 #define L_BUG "\010"			/* BIRD bugs */
 
-void log_init(char *);			/* Initialize logging to given file (NULL=stderr, ""=syslog) */
-void log_init_debug(char *);		/* Initialize debug dump to given file (NULL=stderr, ""=off) */
-
 void debug(char *msg, ...);		/* Printf to debug output */
 
 /* Debugging */

sysdep/unix/Modules

@@ -4,6 +4,7 @@ timer.h
 io.c
 unix.h
 endian.h
+config.Y
 
 krt.c
 krt.h

sysdep/unix/config.Y

@@ -0,0 +1,62 @@
+/*
+ *	BIRD -- UNIX Configuration
+ *
+ *	(c) 1999 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+CF_HDR
+
+#include "lib/unix.h"
+
+CF_DECLS
+
+CF_KEYWORDS(LOG, SYSLOG, ALL, DEBUG, TRACE, INFO, REMOTE, WARNING, ERROR, AUTH, FATAL, BUG)
+
+%type <i> log_mask log_mask_list log_cat
+
+CF_GRAMMAR
+
+CF_ADDTO(conf, log_config)
+
+log_config: LOG TEXT log_mask ';' {
+    struct log_config *c = cfg_allocz(sizeof(struct log_config));
+    FILE *f = rfopen(new_config->pool, $2, "a");
+    if (!f) cf_error("Unable to open log file `%s': %m", $2);
+    c->mask = $3;
+    c->fh = f;
+    add_tail(&new_config->logfiles, &c->n);
+  }
+ | LOG SYSLOG log_mask ';' {
+    struct log_config *c = cfg_allocz(sizeof(struct log_config));
+    c->mask = $3;
+    add_tail(&new_config->logfiles, &c->n);
+  }
+ ;
+
+log_mask:
+   ALL { $$ = ~0; }
+ | '{' log_mask_list '}' { $$ = $2; }
+ ;
+
+log_mask_list:
+   log_cat { $$ = 1 << $1; }
+ | log_mask_list ',' log_cat { $$ = $1 | (1 << $3); }
+ ;
+
+log_cat:
+   DEBUG { $$ = L_DEBUG[0]; }
+ | TRACE { $$ = L_TRACE[0]; }
+ | INFO { $$ = L_INFO[0]; }
+ | REMOTE { $$ = L_REMOTE[0]; }
+ | WARNING { $$ = L_WARN[0]; }
+ | ERROR { $$ = L_ERR[0]; }
+ | AUTH { $$ = L_AUTH[0]; }
+ | FATAL { $$ = L_FATAL[0]; }
+ | BUG { $$ = L_BUG[0]; }
+ ;
+
+CF_CODE
+
+CF_END

sysdep/unix/log.c

@@ -14,21 +14,26 @@
 #include "nest/bird.h"
 #include "nest/cli.h"
 #include "lib/string.h"
+#include "lib/lists.h"
+#include "lib/unix.h"
 
-static int log_inited;
-static FILE *logf = NULL;
 static FILE *dbgf = NULL;
+static list *current_log_list;
+static list init_log_list;
 
 #ifdef HAVE_SYSLOG
 #include <sys/syslog.h>
 
 static int syslog_priorities[] = {
-  LOG_INFO,
+  LOG_DEBUG,
+  LOG_DEBUG,
   LOG_DEBUG,
   LOG_INFO,
+  LOG_ERR,
   LOG_WARNING,
   LOG_ERR,
-  LOG_NOTICE,
+  LOG_ERR,
+  LOG_CRIT,
   LOG_CRIT
 };
 #endif
@@ -36,50 +41,55 @@ static int syslog_priorities[] = {
 static char *class_names[] = {
   "???",
   "DBG",
+  "TRACE",
   "INFO",
+  "RMT",
   "WARN",
   "ERR",
   "AUTH",
-  "FATAL"
+  "FATAL",
+  "BUG"
 };
 
 static void
 vlog(int class, char *msg, va_list args)
 {
   char buf[1024];
-  char date[32];
+  struct log_config *l;
 
   if (bvsnprintf(buf, sizeof(buf)-1, msg, args) < 0)
     bsprintf(buf + sizeof(buf) - 100, " ... <too long>");
 
-  if (logf)
+  WALK_LIST(l, *current_log_list)
     {
-      time_t now = time(NULL);
-      struct tm *tm = localtime(&now);
+      if (!(l->mask & (1 << class)))
+	continue;
+      if (l->fh)
+	{
+	  time_t now = time(NULL);
+	  struct tm *tm = localtime(&now);
 
-      bsprintf(date, "%02d-%02d-%04d %02d:%02d:%02d <%s> ",
-	       tm->tm_mday,
-	       tm->tm_mon+1,
-	       tm->tm_year+1900,
-	       tm->tm_hour,
-	       tm->tm_min,
-	       tm->tm_sec,
-	       class_names[class]);
-      fputs(date, logf);
-      fputs(buf, logf);
-      fputc('\n', logf);
-      fflush(logf);
-    }
+	  if (l->terminal_flag)
+	    fputs("bird: ", l->fh);
+	  else
+	    {
+	      fprintf(l->fh, "%02d-%02d-%04d %02d:%02d:%02d <%s> ",
+		       tm->tm_mday,
+		       tm->tm_mon+1,
+		       tm->tm_year+1900,
+		       tm->tm_hour,
+		       tm->tm_min,
+		       tm->tm_sec,
+		       class_names[class]);
+	    }
+	  fputs(buf, l->fh);
+	  fputc('\n', l->fh);
+	  fflush(l->fh);
+	}
 #ifdef HAVE_SYSLOG
-  else if (log_inited)
-    syslog(syslog_priorities[class], "%s", buf);
+      else
+	syslog(syslog_priorities[class], "%s", buf);
 #endif
-  else
-    {
-      fputs("bird: ", stderr);
-      fputs(buf, stderr);
-      fputc('\n', stderr);
-      fflush(stderr);
     }
   cli_echo(class, buf);
 }
@@ -124,36 +134,40 @@ debug(char *msg, ...)
   char buf[1024];
 
   va_start(args, msg);
-  if (bvsnprintf(buf, sizeof(buf), msg, args) < 0)
-    bsprintf(buf + sizeof(buf) - 100, " ... <too long>\n");
   if (dbgf)
-    fputs(buf, dbgf);
+    {
+      if (bvsnprintf(buf, sizeof(buf), msg, args) < 0)
+	bsprintf(buf + sizeof(buf) - 100, " ... <too long>\n");
+      fputs(buf, dbgf);
+    }
   va_end(args);
 }
 
 void
-log_init(char *f)
+log_init(int debug)
 {
-  FILE *new;
+  static struct log_config lc_stderr = { mask: ~0, terminal_flag: 1 };
+
+  init_list(&init_log_list);
+  current_log_list = &init_log_list;
 
-  if (!f)
-    new = stderr;
-  else if (!*f)
-    {
-      new = NULL;
 #ifdef HAVE_SYSLOG
-      openlog("bird", LOG_CONS | LOG_NDELAY, LOG_DAEMON);
-#endif
-    }
-  else if (!(new = fopen(f, "a")))
+  if (!debug)
     {
-      log(L_ERR "Unable to open log file `%s': %m", f);
-      return;
+      static struct log_config lc_syslog = { mask: ~0 };
+      openlog("bird", LOG_CONS | LOG_NDELAY, LOG_DAEMON);
+      add_tail(current_log_list, &lc_syslog.n);
     }
-  if (logf && logf != stderr)
-    fclose(logf);
-  logf = new;
-  log_inited = 1;
+#endif
+
+  lc_stderr.fh = stderr;
+  add_tail(current_log_list, &lc_stderr.n);
+}
+
+void
+log_switch(list *l)
+{
+  current_log_list = l;
 }
 
 void
@@ -162,9 +176,9 @@ log_init_debug(char *f)
   if (dbgf && dbgf != stderr)
     fclose(dbgf);
   if (!f)
-    dbgf = stderr;
-  else if (!*f)
     dbgf = NULL;
+  else if (!*f)
+    dbgf = stderr;
   else if (!(dbgf = fopen(f, "a")))
     log(L_ERR "Error opening debug file `%s': %m", f);
 }

sysdep/unix/main.c

@@ -67,6 +67,18 @@ cf_read(byte *dest, unsigned int len)
   return l;
 }
 
+void
+sysdep_preconfig(struct config *c)
+{
+  init_list(&c->logfiles);
+}
+
+void
+sysdep_commit(struct config *c)
+{
+  log_switch(&c->logfiles);
+}
+
 static void
 read_config(void)
 {
@@ -258,12 +270,13 @@ signal_init(void)
  *	Parsing of command-line arguments
  */
 
-static char *opt_list = "c:d:";
+static char *opt_list = "c:dD:";
+static int debug_flag = 1;		/* FIXME: Turn off for production use */
 
 static void
 usage(void)
 {
-  fprintf(stderr, "Usage: bird [-c <config-file>] [-d <debug-file>]\n");
+  fprintf(stderr, "Usage: bird [-c <config-file>] [-d] [-D <debug-file>]\n");
   exit(1);
 }
 
@@ -279,7 +292,11 @@ parse_args(int argc, char **argv)
 	config_name = optarg;
 	break;
       case 'd':
+	debug_flag |= 1;
+	break;
+      case 'D':
 	log_init_debug(optarg);
+	debug_flag |= 2;
 	break;
       default:
 	usage();
@@ -300,10 +317,12 @@ main(int argc, char **argv)
     dmalloc_debug(0x2f03d00);
 #endif
 
-  log_init_debug(NULL);
   setvbuf(stdout, NULL, _IONBF, 0);	/* FIXME: Kill some day. */
   setvbuf(stderr, NULL, _IONBF, 0);
   parse_args(argc, argv);
+  if (debug_flag == 1)
+    log_init_debug("");
+  log_init(debug_flag);
 
   log(L_INFO "Launching BIRD " BIRD_VERSION "...");
 

sysdep/unix/unix.h

@@ -9,6 +9,8 @@
 #ifndef _BIRD_UNIX_H_
 #define _BIRD_UNIX_H_
 
+struct pool;
+
 /* main.c */
 
 void async_config(void);
@@ -38,9 +40,23 @@ void io_loop(void);
 void fill_in_sockaddr(sockaddr *sa, ip_addr a, unsigned port);
 void get_sockaddr(sockaddr *sa, ip_addr *a, unsigned *port);
 int sk_open_unix(struct birdsock *s, char *name);
+void *tracked_fopen(struct pool *, char *name, char *mode);
 
 /* krt.c bits */
 
 void krt_io_init(void);
 
+/* log.c */
+
+void log_init(int debug);
+void log_init_debug(char *);		/* Initialize debug dump to given file (NULL=stderr, ""=off) */
+void log_switch(struct list *);
+
+struct log_config {
+  node n;
+  unsigned int mask;			/* Classes to log */
+  void *fh;				/* FILE to log to, NULL=syslog */
+  int terminal_flag;
+};
+
 #endif