From 52e011899b22dec7f650d34a1145cf06f4e403bd Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Wed, 9 Aug 1995 22:39:09 +0000
Subject: [PATCH] (get_truename_buffer): New function.

---
 src/buffer.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/src/buffer.c b/src/buffer.c
index f0bd7013e50..db1e3110dd0 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -236,6 +236,24 @@ See also `find-buffer-visiting'.")
   return Qnil;
 }
 
+Lisp_Object
+get_truename_buffer (filename)
+     register Lisp_Object filename;
+{
+  register Lisp_Object tail, buf, tem;
+
+  for (tail = Vbuffer_alist; CONSP (tail); tail = XCONS (tail)->cdr)
+    {
+      buf = Fcdr (XCONS (tail)->car);
+      if (!BUFFERP (buf)) continue;
+      if (!STRINGP (XBUFFER (buf)->file_truename)) continue;
+      tem = Fstring_equal (XBUFFER (buf)->file_truename, filename);
+      if (!NILP (tem))
+	return buf;
+    }
+  return Qnil;
+}
+
 /* Incremented for each buffer created, to assign the buffer number. */
 int buffer_count;
 
-- 
2.39.2