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git-mirror · Aug 13, 2001 · 1054384 · 1054384
1 parent 6f47f64
commit 1054384
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diff --git a/manual/filesys.texi b/manual/filesys.texi
@@ -1138,14 +1138,16 @@ call @code{readlink} again.  Here is an example:
 
 @smallexample
 char *
-readlink_malloc (char *filename)
+readlink_malloc (const char *filename)
 @{
   int size = 100;
 
   while (1)
     @{
       char *buffer = (char *) xmalloc (size);
       int nchars = readlink (filename, buffer, size);
+      if (nchars < 0)
+        return NULL;
       if (nchars < size)
         return buffer;
       free (buffer);