1 files changed, 6 insertions, 4 deletions

diff --git a/df.c b/df.c
index 331ef2d49..c38720454 100644
--- a/df.c
+++ b/df.c
@@ -2,7 +2,7 @@
 /*
  * Mini df implementation for busybox
  *
- * Copyright (C) 1999 by Lineo, inc.
+ * Copyright (C) 1999,2000 by Lineo, inc.
  * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>
  * based on original code by (I think) Bruce Perens <bruce@pixar.com>.
  *
@@ -28,9 +28,8 @@
 #include <sys/stat.h>
 #include <sys/vfs.h>
 
-static const char df_usage[] = "df [filesystem ...]\n"
-
-        "\n" "\tPrint the filesystem space used and space available.\n";
+static const char df_usage[] = "df [filesystem ...]\n\n"
+        "Print the filesystem space used and space available.\n";
 
 extern const char mtab_file[];  /* Defined in utility.c */
 
@@ -76,6 +75,9 @@ extern int df_main(int argc, char **argv)
                 struct mntent *mountEntry;
                 int status;
 
+                if (**(argv + 1) == '-') {
+                        usage(df_usage);
+                }
                 while (argc > 1) {
                         if ((mountEntry = findMountPoint(argv[1], mtab_file)) == 0) {
                                 fprintf(stderr, "%s: can't find mount point.\n", argv[1]);