kc3-lang/gnulib/lib/backup-rename.c

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• Hash : b6ac7d13
  Author :
  Date : 2017-07-30T10:53:32
  

  backup-rename: new module
  
  It is like backupfile, except it avoids some race conditions,
  and it does not output to stderr or exit.
  * MODULES.html.sh: Add backup-rename.
  * lib/backup-find.c, lib/backup-internal.h, lib/backup-rename.c:
  * modules/backup-rename: New files.
  * lib/backupfile.c: Turn this into an internals file, which
  contains code common to backupfile and backup_rename.  Do not
  include argmatch.h or xalloc.h: include xalloc-oversized.h.
  Include renameat2.h and fcntl.h.
  (BACKUP_NOMEM): New constant.
  (numbered_backup): New args BASE_OFFSET and *DIRPP.  Do not exit
  on memory exhaustion; just return BACKUP_NOMEM.  Caller changed.
  (backupfile_internal): Rename from find_backup_file_name.
  Support new arg RENAME.
  (backup_args, backup_types, get_version, xget_version):
  Move to lib/backup-find.c.
  * lib/backupfile.h (backup_file_rename): New decl.
  * modules/backupfile (Files): Add lib/backup-internal.h,
  lib/backup-find.c.
  (Depends-on): Add dirfd, fcntl, renameat2.
  (lib_SOURCES): Add backup-find.c.
  

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• lib/backup-rename.c

• /* Rename a file to a backup name, Emacs style.
  
     Copyright 2017 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     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.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #include "backup-internal.h"
  
  /* Rename the existing file FILE to a backup name, allocated with
     malloc, and return the backup name.  On failure return a null
     pointer, setting errno.  Do not call this function if backup_type
     == no_backups.  */
  
  char *
  backup_file_rename (char const *file, enum backup_type backup_type)
  {
    return backupfile_internal (file, backup_type, true);
  }
  

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