kdc: add --testing option for leak testing

The kdc nowadays forks and restarts worker children.  This is nice, but
for leak checking in tests on OS X with leak(1) we really need the
worker to be the one process.

kdc/config.c

@@ -52,6 +52,7 @@ static char *max_request_str;	/* `max_request' as a string */
 static int disable_des = -1;
 
 static int builtin_hdb_flag;
+int testing_flag;
 static int help_flag;
 static int version_flag;
 
@@ -120,6 +121,7 @@ static struct getargs args[] = {
     {   "chroot",	0,	arg_string, &chroot_string,
 	"chroot directory to run in", NULL
     },
+    {	"testing",	0,	arg_flag,   &testing_flag, NULL, NULL },
     {	"help",		'h',	arg_flag,   &help_flag, NULL, NULL },
     {	"version",	'v',	arg_flag,   &version_flag, NULL, NULL }
 };

kdc/connect.c

@@ -1153,6 +1153,7 @@ start_kdc(krb5_context context,
     tv1.tv_usec = 0;
 
 #ifdef HAVE_FORK
+    if (!testing_flag) {
         /* Note that we might never execute the body of this loop */
         while (exit_flag == 0) {
 
@@ -1195,7 +1196,8 @@ start_kdc(krb5_context context,
                         break;
                     }
                 }
-	    kdc_log(context, config, 0, "KDC worker process started: %d", pid);
+                kdc_log(context, config, 0, "KDC worker process started: %d",
+                        pid);
                 num_kdcs++;
                 gettimeofday(&tv1, NULL);
                 break;
@@ -1252,6 +1254,10 @@ start_kdc(krb5_context context,
      end:
         kdc_log(context, config, 0, "KDC master process exiting", pid);
         free(pids);
+    } else {
+        loop(context, config, d, ndescr, -1);
+        kdc_log(context, config, 0, "KDC exiting", pid);
+    }
 #else
     loop(context, config, d, ndescr, -1);
     kdc_log(context, config, 0, "KDC exiting", pid);

kdc/kdc_locl.h

@@ -103,6 +103,8 @@ extern int detach_from_console;
 extern int daemon_child;
 extern int do_bonjour;
 
+extern int testing_flag;
+
 extern const struct units _kdc_digestunits[];
 
 #define KDC_LOG_FILE		"kdc.log"