Change OS/PRECIOUS-BACKUP-PATHNAME to use Emacs 19 names.

diff --git a/v7/src/edwin/unix.scm b/v7/src/edwin/unix.scm
index 6763c7faea2059f242b2a25b62ff2eac69589948..927577fb0d4f59555cccdec5908f7ca228b16055 100644 (file)
--- a/v7/src/edwin/unix.scm
+++ b/v7/src/edwin/unix.scm
@@ -1,8 +1,8 @@
 ;;; -*-Scheme-*-
 ;;;
-;;;    $Id: unix.scm,v 1.39 1993/10/26 23:15:31 cph Exp $
+;;;    $Id: unix.scm,v 1.40 1994/03/04 21:32:09 cph Exp $
 ;;;
-;;;    Copyright (c) 1989-1993 Massachusetts Institute of Technology
+;;;    Copyright (c) 1989-94 Massachusetts Institute of Technology
 ;;;
 ;;;    This material was developed by the Scheme project at the
 ;;;    Massachusetts Institute of Technology, Department of
@@ -132,8 +132,15 @@ Includes the new backup.  Must be > 0."
              (directory-pathname pathname)))))
 
 (define (os/precious-backup-pathname pathname)
-  (->pathname (string-append (->namestring pathname) "#")))
-
+  (let ((directory (directory-pathname pathname)))
+    (let loop ((i 0))
+      (let ((pathname
+            (merge-pathnames (string-append "#tmp#" (number->string i))
+                             directory)))
+       (if (allocate-temporary-file pathname)
+           pathname
+           (loop (+ i 1)))))))
+\f
 (define (os/backup-buffer? truename)
   (and (memv (string-ref (vector-ref (file-attributes truename) 8) 0)
             '(#\- #\l))
@@ -162,7 +169,7 @@ Includes the new backup.  Must be > 0."
          (string-set! result 0 #\$)
          result)
        filename)))
-\f
+
 (define (os/backup-by-copying? truename buffer)
   (let ((attributes (file-attributes truename)))
     (or (and (ref-variable backup-by-copying-when-linked buffer)