s3-libnetapi: Correctly check for lp_realm.

Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>

diff --git a/source3/lib/netapi/joindomain.c b/source3/lib/netapi/joindomain.c
index 632c8c6638fc9c2ca16842086a3d5ba08c683236..dc224b6191613128f5add19e375eee9f947bc5c0 100644 (file)
--- a/source3/lib/netapi/joindomain.c
+++ b/source3/lib/netapi/joindomain.c
@@ -175,6 +175,7 @@ WERROR NetUnjoinDomain_l(struct libnetapi_ctx *mem_ctx,
        const char *domain = NULL;
        WERROR werr;
        struct libnetapi_private_ctx *priv;
+       const char *realm = lp_realm();
 
        priv = talloc_get_type_abort(mem_ctx->private_data,
                struct libnetapi_private_ctx);
@@ -186,8 +187,8 @@ WERROR NetUnjoinDomain_l(struct libnetapi_ctx *mem_ctx,
        werr = libnet_init_UnjoinCtx(mem_ctx, &u);
        W_ERROR_NOT_OK_RETURN(werr);
 
-       if (lp_realm()) {
-               domain = lp_realm();
+       if (realm[0] != '\0') {
+               domain = realm;
        } else {
                domain = lp_workgroup();
        }
@@ -352,8 +353,10 @@ WERROR NetGetJoinInformation_r(struct libnetapi_ctx *ctx,
 WERROR NetGetJoinInformation_l(struct libnetapi_ctx *ctx,
                               struct NetGetJoinInformation *r)
 {
-       if ((lp_security() == SEC_ADS) && lp_realm()) {
-               *r->out.name_buffer = talloc_strdup(ctx, lp_realm());
+       const char *realm = lp_realm();
+
+       if ((lp_security() == SEC_ADS) && realm[0] != '\0') {
+               *r->out.name_buffer = talloc_strdup(ctx, realm);
        } else {
                *r->out.name_buffer = talloc_strdup(ctx, lp_workgroup());
        }