~drizzle-trunk/drizzle/development

/* Copyright (C) 2000 MySQL AB

   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; version 2 of the License.

   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, write to the Free Software

   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include "mysys_priv.h"

#include <my_dir.h> /* for stat */

#include <mystrings/m_string.h>

#if defined(HAVE_UTIME_H)

#include <utime.h>

#elif defined(HAVE_SYS_UTIME_H)

#include <sys/utime.h>

#elif !defined(HPUX10)

#include <time.h>

struct utimbuf {

  time_t actime;

  time_t modtime;

};

#endif

/*

  int my_copy(const char *from, const char *to, myf MyFlags)

  NOTES

    Ordinary ownership and accesstimes are copied from 'from-file'

    If MyFlags & MY_HOLD_ORIGINAL_MODES is set and to-file exists then

    the modes of to-file isn't changed

    If MyFlags & MY_DONT_OVERWRITE_FILE is set, we will give an error

    if the file existed.

  WARNING

    Don't set MY_FNABP or MY_NABP bits on when calling this function !

  RETURN

    0	ok

    #	Error

*/

int my_copy(const char *from, const char *to, myf MyFlags)

{

  uint Count;

  bool new_file_stat= 0; /* 1 if we could stat "to" */

  int create_flag;

  File from_file,to_file;

  uchar buff[IO_SIZE];

  struct stat stat_buff,new_stat_buff;

  from_file=to_file= -1;

  assert(!(MyFlags & (MY_FNABP | MY_NABP))); /* for my_read/my_write */

  if (MyFlags & MY_HOLD_ORIGINAL_MODES)		/* Copy stat if possible */

    new_file_stat= test(!stat((char*) to, &new_stat_buff));

  if ((from_file=my_open(from,O_RDONLY | O_SHARE,MyFlags)) >= 0)

  {

    if (stat(from, &stat_buff))

    {

      my_errno=errno;

      goto err;

    }

    if (MyFlags & MY_HOLD_ORIGINAL_MODES && new_file_stat)

      stat_buff=new_stat_buff;

    create_flag= (MyFlags & MY_DONT_OVERWRITE_FILE) ? O_EXCL : O_TRUNC;

    if ((to_file=  my_create(to,(int) stat_buff.st_mode,

			     O_WRONLY | create_flag | O_BINARY | O_SHARE,

			     MyFlags)) < 0)

      goto err;

    while ((Count=my_read(from_file, buff, sizeof(buff), MyFlags)) != 0)

    {

	if (Count == (uint) -1 ||

	    my_write(to_file,buff,Count,MYF(MyFlags | MY_NABP)))

	goto err;

    }

    if (my_close(from_file,MyFlags) | my_close(to_file,MyFlags))

      return(-1);				/* Error on close */

    /* Copy modes if possible */

    if (MyFlags & MY_HOLD_ORIGINAL_MODES && !new_file_stat)

	return(0);			/* File copyed but not stat */

    chmod(to, stat_buff.st_mode & 07777); /* Copy modes */

    chown(to, stat_buff.st_uid,stat_buff.st_gid); /* Copy ownership */

    if (MyFlags & MY_COPYTIME)

    {

      struct utimbuf timep;

      timep.actime  = stat_buff.st_atime;

      timep.modtime = stat_buff.st_mtime;

      utime((char*) to, &timep); /* last accessed and modified times */

    }

    return(0);

  }

err:

  if (from_file >= 0) my_close(from_file,MyFlags);

  if (to_file >= 0)

  {

    my_close(to_file, MyFlags);

    /* attempt to delete the to-file we've partially written */

    my_delete(to, MyFlags);

  }

  return(-1);

} /* my_copy */