backupfile.h

早期freebsd实现

/* backupfile.h -- declarations for making Emacs style backup file names
   Copyright (C) 1990 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or modify
   it without restriction.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  */

/* When to make backup files. */
enum backup_type
{
  /* Never make backups. */
  none,

  /* Make simple backups of every file. */
  simple,

  /* Make numbered backups of files that already have numbered backups,
     and simple backups of the others. */
  numbered_existing,

  /* Make numbered backups of every file. */
  numbered
};

extern enum backup_type backup_type;
extern char *simple_backup_suffix;

#ifdef __STDC__
char *find_backup_file_name (char *file);
enum backup_type get_version (char *version);
#else
char *find_backup_file_name ();
enum backup_type get_version ();
#endif