samples/server: don't use err(3) if errno hasn't been set

Signed-off-by: Thanos Makatos <thanos.makatos@nutanix.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/samples/server.c b/samples/server.c
index be3edfd..8d30c06 100644
--- a/samples/server.c
+++ b/samples/server.c
@@ -209,12 +209,14 @@ int main(int argc, char *argv[])
                 verbose = true;
                 break;
             default: /* '?' */
-                err(EXIT_FAILURE, "Usage: %s [-d] <IOMMU group>\n", argv[0]);
+                fprintf(stderr, "Usage: %s [-d] <IOMMU group>\n", argv[0]);
+                exit(EXIT_FAILURE);
         }
     }
 
     if (optind >= argc) {
-        err(EXIT_FAILURE, "missing MUSER device UUID");
+        fprintf(stderr, "missing MUSER device UUID\n");
+        exit(EXIT_FAILURE);
     }
 
     server_data.bar1 = malloc(sysconf(_SC_PAGESIZE));