(main): Count the stat'able arguments.

Print the header line only if there is at least one valid argument.
Reported by Andy Longton <alongton@metamark.com>

diff --git a/src/df.c b/src/df.c
index 6cf22ef..885c262 100644 (file)
--- a/src/df.c
+++ b/src/df.c
@@ -762,6 +762,7 @@ main (int argc, char **argv)
 {
   int c;
   struct stat *stats IF_LINT (= 0);
+  int n_valid_args = 0;
 
   program_name = argv[0];
   setlocale (LC_ALL, "");
@@ -877,12 +878,18 @@ main (int argc, char **argv)
     stats = (struct stat *)
       xmalloc ((argc - optind) * sizeof (struct stat));
     for (i = optind; i < argc; ++i)
-      if (stat (argv[i], &stats[i - optind]))
-       {
-         error (0, errno, "%s", argv[i]);
-         exit_status = 1;
-         argv[i] = NULL;
-       }
+      {
+       if (stat (argv[i], &stats[i - optind]))
+         {
+           error (0, errno, "%s", argv[i]);
+           exit_status = 1;
+           argv[i] = NULL;
+         }
+       else
+         {
+           ++n_valid_args;
+         }
+      }
   }
 
   mount_list =
@@ -917,7 +924,9 @@ main (int argc, char **argv)
       /* Display explicitly requested empty filesystems. */
       show_listed_fs = 1;
 
-      print_header ();
+      if (n_valid_args > 0)
+       print_header ();
+
       for (i = optind; i < argc; ++i)
        if (argv[i])
          show_entry (argv[i], &stats[i - optind]);