my_redel.c

/* Copyright (c) 2000, 2023, Oracle and/or its affiliates.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   Without limiting anything contained in the foregoing, this file,
   which is part of C Driver for MySQL (Connector/C), is also subject to the
   Universal FOSS Exception, version 1.0, a copy of which can be found at
   http://oss.oracle.com/licenses/universal-foss-exception.

   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, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

#include "mysys_priv.h"
#include "my_sys.h"
#include <my_dir.h>
#include <m_string.h>
#include "mysys_err.h"
#include "my_thread_local.h"

#ifndef _WIN32
#include <utime.h>
#else
#include <sys/utime.h>
#endif

	/*
	  Rename with copy stat form old file
	  Copy stats from old file to new file, deletes orginal and
	  changes new file name to old file name

	  if MY_REDEL_MAKE_COPY is given, then the orginal file
	  is renamed to org_name-'current_time'.BAK

          if MY_REDEL_NO_COPY_STAT is given, stats are not copied
          from org_name to tmp_name.
	*/

#define REDEL_EXT ".BAK"

int my_redel(const char *org_name, const char *tmp_name, myf MyFlags)
{
  int error=1;
  DBUG_ENTER("my_redel");
  DBUG_PRINT("my",("org_name: '%s' tmp_name: '%s'  MyFlags: %d",
		   org_name,tmp_name,MyFlags));

  if (!(MyFlags & MY_REDEL_NO_COPY_STAT))
  {
    if (my_copystat(org_name,tmp_name,MyFlags) < 0)
      goto end;
  }
  if (MyFlags & MY_REDEL_MAKE_BACKUP)
  {
    char name_buff[FN_REFLEN+20];    
    char ext[20];
    ext[0]='-';
    get_date(ext+1,2+4,(time_t) 0);
    my_stpcpy(strend(ext),REDEL_EXT);
    if (my_rename(org_name, fn_format(name_buff, org_name, "", ext, 2),
		  MyFlags))
      goto end;
  }
  else if (my_delete_allow_opened(org_name, MyFlags))
      goto end;
  if (my_rename(tmp_name,org_name,MyFlags))
    goto end;

  error=0;
end:
  DBUG_RETURN(error);
} /* my_redel */


	/* Copy stat from one file to another */
	/* Return -1 if can't get stat, 1 if wrong type of file */

int my_copystat(const char *from, const char *to, int MyFlags)
{
  MY_STAT statbuf;

  if (my_stat(from, &statbuf, MyFlags) == NULL)
    return -1;				/* Can't get stat on input file */

  if ((statbuf.st_mode & S_IFMT) != S_IFREG)
    return 1;

  /* Copy modes */
  if (chmod(to, statbuf.st_mode & 07777))
  {
    set_my_errno(errno);
    if (MyFlags & (MY_FAE+MY_WME))
    {
      char errbuf[MYSYS_STRERROR_SIZE];
      my_error(EE_CHANGE_PERMISSIONS, MYF(0), from,
               errno, my_strerror(errbuf, sizeof(errbuf), errno));
    }
    return -1;
  }

#if !defined(_WIN32)
  if (statbuf.st_nlink > 1 && MyFlags & MY_LINK_WARNING)
  {
    if (MyFlags & MY_LINK_WARNING)
      my_error(EE_LINK_WARNING,MYF(0),from,statbuf.st_nlink);
  }
  /* Copy ownership */
  if (chown(to, statbuf.st_uid, statbuf.st_gid))
  {
    set_my_errno(errno);
    if (MyFlags & (MY_FAE+MY_WME))
    {
      char errbuf[MYSYS_STRERROR_SIZE];
      my_error(EE_CHANGE_OWNERSHIP, MYF(0), from,
               errno, my_strerror(errbuf, sizeof(errbuf), errno));
    }
    return -1;
  }
#endif /* !_WIN32 */

  if (MyFlags & MY_COPYTIME)
  {
    struct utimbuf timep;
    timep.actime  = statbuf.st_atime;
    timep.modtime = statbuf.st_mtime;
    (void) utime((char*) to, &timep);/* Update last accessed and modified times */
  }

  return 0;
} /* my_copystat */