in copy_file(), assert that inn and out don't both point to the same

file


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4132 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

+2007-07-11  David Lawrence Ramsey  <pooka109@gmail.com>
+
+	* files.c (copy_file): Assert that inn and out don't both point
+	to the same file.
+
 2007-07-10  David Lawrence Ramsey  <pooka109@gmail.com>
 
 	* chars.c (nstrcasestr, mbstrcasestr, revstrstr, revstrcasestr,

src/files.c

@@ -1234,11 +1234,11 @@ void init_backup_dir(void)
  * on write error. */
 int copy_file(FILE *inn, FILE *out)
 {
+    int retval = 0;
     char buf[BUFSIZ];
     size_t charsread;
-    int retval = 0;
 
-    assert(inn != NULL && out != NULL);
+    assert(inn != NULL && out != NULL && inn != out);
 
     do {
 	charsread = fread(buf, sizeof(char), BUFSIZ, inn);