X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/5dd6771b28c257af405d7248639ed0e3bcdce38b..4974d09cc659e2859fcf916ad020628c9695e2f8:/sbr/m_backup.c

diff --git a/sbr/m_backup.c b/sbr/m_backup.c
index c34c4097..5a616f26 100644
--- a/sbr/m_backup.c
+++ b/sbr/m_backup.c
@@ -1,6 +1,4 @@
-
-/*
- * m_backup.c -- construct a backup file
+/* m_backup.c -- construct a backup file
  *
  * This code is Copyright (c) 2002, by the authors of nmh.  See the
  * COPYRIGHT file in the root directory of the nmh distribution for
@@ -8,21 +6,22 @@
  */
 
 #include <h/mh.h>
+#include "m_mktemp.h"
 
 
 char *
-m_backup (char *file)
+m_backup (const char *file)
 {
-    char *cp;
+    const char *cp;
     static char buffer[BUFSIZ];
 
-    if ((cp = r1bindex(file, '/')) == file)
+    if ((cp = r1bindex((char *) file, '/')) == file)
 	snprintf(buffer, sizeof(buffer), "%s%s",
 		BACKUP_PREFIX, cp);
     else
 	snprintf(buffer, sizeof(buffer), "%.*s%s%s", (int)(cp - file), file,
 		BACKUP_PREFIX, cp);
 
-    unlink(buffer);
+    (void) m_unlink(buffer);
     return buffer;
 }