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      1 /*
      2  * $OpenBSD: backupfile.h,v 1.6 2003/07/28 18:35:36 otto Exp $
      3  * $DragonFly: src/usr.bin/patch/backupfile.h,v 1.3 2007/09/29 23:11:10 swildner Exp $
      4  * $NetBSD: backupfile.h,v 1.7 2021/02/19 17:46:53 nia Exp $
      5  */
      6 
      7 /*
      8  * backupfile.h -- declarations for making Emacs style backup file names
      9  * Copyright (C) 1990 Free Software Foundation, Inc.
     10  *
     11  * This program is free software; you can redistribute it and/or modify it
     12  * without restriction.
     13  *
     14  * This program is distributed in the hope that it will be useful, but WITHOUT
     15  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
     16  * FITNESS FOR A PARTICULAR PURPOSE.
     17  *
     18  */
     19 
     20 /* When to make backup files. */
     21 enum backup_type {
     22 	undefined,
     23 
     24 	/* Never make backups. */
     25 	none,
     26 
     27 	/* Make simple backups of every file. */
     28 	simple,
     29 
     30 	/*
     31 	 * Make numbered backups of files that already have numbered backups,
     32 	 * and simple backups of the others.
     33 	 */
     34 	numbered_existing,
     35 
     36 	/* Make numbered backups of every file. */
     37 	numbered
     38 };
     39 
     40 extern enum backup_type backup_type;
     41 extern const char	*simple_backup_suffix;
     42 
     43 char		*find_backup_file_name(const char *file);
     44 enum backup_type get_version(const char *version);
     45