Don't call realpath() on fake pathnames like "-" and FAKE_HELPFILE.

filename.c

@@ -797,18 +797,32 @@ lglob(filename)
  return (gfilename);
 }
 
+/*
+ * Does path not represent something in the file system?
+ */
+ public int
+is_fake_pathname(path)
+ char *path;
+{
+ return (strcmp(path, "-") == 0 ||
+ strcmp(path, FAKE_HELPFILE) == 0 || strcmp(path, FAKE_EMPTYFILE) == 0);
+}
+
 /*
  * Return canonical pathname.
  */
  public char *
 lrealpath(path)
  char *path;
 {
+ if (!is_fake_pathname(path))
+ {
 #if HAVE_REALPATH
- char rpath[PATH_MAX];
- if (realpath(path, rpath) != NULL)
- return (save(rpath));
+  char rpath[PATH_MAX];
+  if (realpath(path, rpath) != NULL)
+  return (save(rpath));
 #endif
+ }
  return (save(path));
 }