Add the kprop-port option to kadmind

The -k option for kadmind sets the port number that kprop is spawned
with during an iprop full resync.  Fall back to checking the
KPROP_PORT environment variable if the option is not set.

ticket: 8456 (new)

doc/admin/admin_commands/kadmind.rst

@@ -16,6 +16,7 @@ SYNOPSIS
 [**-P** *pid_file*]
 [**-p** *kdb5_util_path*]
 [**-K** *kprop_path*]
+[**-k** *kprop_port*]
 [**-F** *dump_file*]
 
 DESCRIPTION
@@ -101,6 +102,11 @@ OPTIONS
     specifies the path to the kprop command to use to send full dumps
     to slaves in response to full resync requests.
 
+**-k** *kprop_port*
+    specifies the port by which the kprop process that is spawned by kadmind
+    connects to the slave kpropd, in order to transfer the dump file during
+    an iprop full resync request.
+
 **-F** *dump_file*
     specifies the file path to be used for dumping the KDB in response
     to full resync requests when iprop is enabled.

src/kadmin/server/ipropd_svc.c

@@ -36,6 +36,7 @@ extern short l_port;
 extern char *kdb5_util;
 extern char *kprop;
 extern char *dump_file;
+extern char *kprop_port;
 
 static char *reply_ok_str	= "UPDATE_OK";
 static char *reply_err_str	= "UPDATE_ERROR";
@@ -392,10 +393,9 @@ ipropx_resync(uint32_t vers, struct svc_req *rqstp)
 
 	DPRINT("%s: exec `kprop -r %s -f %s %s' ...\n",
 	       whoami, handle->params.realm, dump_file, clhost);
-	/* XXX Yuck!  */
-	if (getenv("KPROP_PORT")) {
+	if (kprop_port != NULL) {
 	    pret = execl(kprop, "kprop", "-r", handle->params.realm, "-f",
-			 dump_file, "-P", getenv("KPROP_PORT"), clhost, NULL);
+			 dump_file, "-P", kprop_port, clhost, NULL);
 	} else {
 	    pret = execl(kprop, "kprop", "-r", handle->params.realm, "-f",
 			 dump_file, clhost, NULL);

src/kadmin/server/ovsec_kadmd.c

@@ -72,6 +72,7 @@ int nofork = 0;
 char *kdb5_util = KPROPD_DEFAULT_KDB5_UTIL;
 char *kprop = KPROPD_DEFAULT_KPROP;
 char *dump_file = KPROP_DEFAULT_FILE;
+char *kprop_port = NULL;
 
 static krb5_context context;
 static char *progname;
@@ -86,7 +87,7 @@ usage()
     fprintf(stderr, _("Usage: kadmind [-x db_args]* [-r realm] [-m] [-nofork] "
                       "[-port port-number]\n"
                       "\t\t[-proponly] [-p path-to-kdb5_util] [-F dump-file]\n"
-                      "\t\t[-K path-to-kprop] [-P pid_file]\n"
+                      "\t\t[-K path-to-kprop] [-k kprop-port] [-P pid_file]\n"
                       "\nwhere,\n\t[-x db_args]* - any number of database "
                       "specific arguments.\n"
                       "\t\t\tLook at each database documentation for "
@@ -433,6 +434,11 @@ main(int argc, char *argv[])
             if (!argc)
                 usage();
             kprop = *argv;
+        } else if (strcmp(*argv, "-k") == 0) {
+            argc--, argv++;
+            if (!argc)
+                usage();
+            kprop_port = *argv;
         } else {
             break;
         }
@@ -529,6 +535,9 @@ main(int argc, char *argv[])
         }
     }
 
+    if (kprop_port == NULL)
+        kprop_port = getenv("KPROP_PORT");
+
     krb5_klog_syslog(LOG_INFO, _("starting"));
     if (nofork)
         fprintf(stderr, _("%s: starting...\n"), progname);