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/* Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "mysys_priv.h"
#include "my_sys.h"
#include <my_dir.h> /* for stat */
#include <m_string.h>
#include "mysys_err.h"
#include "my_thread_local.h"
#ifndef _WIN32
#include <utime.h>
#else
#include <sys/utime.h>
#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)
{
size_t Count;
my_bool new_file_stat= 0; /* 1 if we could stat "to" */
int create_flag;
File from_file,to_file;
uchar buff[IO_SIZE];
MY_STAT stat_buff,new_stat_buff;
DBUG_ENTER("my_copy");
DBUG_PRINT("my",("from %s to %s MyFlags %d", from, to, MyFlags));
from_file=to_file= -1;
memset(&new_stat_buff, 0, sizeof(MY_STAT));
DBUG_ASSERT(!(MyFlags & (MY_FNABP | MY_NABP))); /* for my_read/my_write */
if (MyFlags & MY_HOLD_ORIGINAL_MODES) /* Copy stat if possible */
new_file_stat= MY_TEST(my_stat((char*) to, &new_stat_buff, MYF(0)));
if ((from_file=my_open(from,O_RDONLY | O_SHARE,MyFlags)) >= 0)
{
if (!my_stat(from, &stat_buff, MyFlags))
{
set_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;
}
/* sync the destination file */
if (MyFlags & MY_SYNC)
{
if (my_sync(to_file, MyFlags))
goto err;
}
if (my_close(from_file,MyFlags) | my_close(to_file,MyFlags))
DBUG_RETURN(-1); /* Error on close */
/* Reinitialize closed fd, so they won't be closed again. */
from_file= -1;
to_file= -1;
/* Copy modes if possible */
if (MyFlags & MY_HOLD_ORIGINAL_MODES && !new_file_stat)
DBUG_RETURN(0); /* File copyed but not stat */
/* Copy modes */
if (chmod(to, stat_buff.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));
}
goto err;
}
#if !defined(_WIN32)
/* Copy ownership */
if (chown(to, stat_buff.st_uid, stat_buff.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));
}
goto err;
}
#endif
if (MyFlags & MY_COPYTIME)
{
struct utimbuf timep;
timep.actime = stat_buff.st_atime;
timep.modtime = stat_buff.st_mtime;
(void) utime((char*) to, &timep); /* last accessed and modified times */
}
DBUG_RETURN(0);
}
err:
if (from_file >= 0) (void) my_close(from_file,MyFlags);
if (to_file >= 0)
{
(void) my_close(to_file, MyFlags);
/* attempt to delete the to-file we've partially written */
(void) my_delete(to, MyFlags);
}
DBUG_RETURN(-1);
} /* my_copy */
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