my_copy.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
- /* 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; either version 2 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, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #define USES_TYPES /* sys/types is included */
- #include "mysys_priv.h"
- #include <sys/stat.h>
- #include <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;
- int new_file_stat, create_flag;
- File from_file,to_file;
- char buff[IO_SIZE];
- struct 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;
- new_file_stat=0;
- if (MyFlags & MY_HOLD_ORIGINAL_MODES) /* Copy stat if possible */
- new_file_stat=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,IO_SIZE,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))
- DBUG_RETURN(-1); /* Error on close */
- /* Copy modes if possible */
- if (MyFlags & MY_HOLD_ORIGINAL_MODES && new_file_stat)
- DBUG_RETURN(0); /* File copyed but not stat */
- VOID(chmod(to, stat_buff.st_mode & 07777)); /* Copy modes */
- #if !defined(MSDOS) && !defined(__WIN__) && !defined(__EMX__) && !defined(OS2) && !defined(__NETWARE__)
- VOID(chown(to, stat_buff.st_uid,stat_buff.st_gid)); /* Copy ownership */
- #endif
- #if !defined(VMS) && !defined(__ZTC__)
- 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 */
- }
- #endif
- DBUG_RETURN(0);
- }
- err:
- if (from_file >= 0) VOID(my_close(from_file,MyFlags));
- if (to_file >= 0) VOID(my_close(to_file,MyFlags));
- DBUG_RETURN(-1);
- } /* my_copy */