Drizzled Public API Documentation

my_copy.cc
1 /* Copyright (C) 2000 MySQL AB
2 
3  This program is free software; you can redistribute it and/or modify
4  it under the terms of the GNU General Public License as published by
5  the Free Software Foundation; version 2 of the License.
6 
7  This program is distributed in the hope that it will be useful,
8  but WITHOUT ANY WARRANTY; without even the implied warranty of
9  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  GNU General Public License for more details.
11 
12  You should have received a copy of the GNU General Public License
13  along with this program; if not, write to the Free Software
14  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
15 
16 #include <config.h>
17 
18 #include <drizzled/internal/my_sys.h>
19 
20 #include <fcntl.h>
21 
22 #include <drizzled/internal/m_string.h>
23 #if defined(HAVE_UTIME_H)
24 #include <utime.h>
25 #elif defined(HAVE_SYS_UTIME_H)
26 #include <sys/utime.h>
27 #elif !defined(HPUX10)
28 #include <time.h>
29 struct utimbuf {
30  time_t actime;
31  time_t modtime;
32 };
33 #endif
34 
35 #ifdef HAVE_SYS_STAT_H
36 # include <sys/stat.h>
37 #endif
38 
39 #include <drizzled/util/test.h>
40 
41 namespace drizzled
42 {
43 namespace internal
44 {
45 
46 /*
47  int my_copy(const char *from, const char *to, myf MyFlags)
48 
49  NOTES
50  Ordinary ownership and accesstimes are copied from 'from-file'
51  If MyFlags & MY_HOLD_ORIGINAL_MODES is set and to-file exists then
52  the modes of to-file isn't changed
53  If MyFlags & MY_DONT_OVERWRITE_FILE is set, we will give an error
54  if the file existed.
55 
56  WARNING
57  Don't set MY_FNABP or MY_NABP bits on when calling this function !
58 
59  RETURN
60  0 ok
61  # Error
62 
63 */
64 
65 int my_copy(const char *from, const char *to, myf MyFlags)
66 {
67  uint32_t Count;
68  bool new_file_stat= 0; /* 1 if we could stat "to" */
69  int create_flag;
70  int from_file,to_file;
71  unsigned char buff[IO_SIZE];
72  struct stat stat_buff,new_stat_buff;
73 
74  from_file=to_file= -1;
75  assert(!(MyFlags & (MY_FNABP | MY_NABP))); /* for my_read/my_write */
76  if (MyFlags & MY_HOLD_ORIGINAL_MODES) /* Copy stat if possible */
77  new_file_stat= test(!stat((char*) to, &new_stat_buff));
78 
79  if ((from_file=my_open(from,O_RDONLY,MyFlags)) >= 0)
80  {
81  if (stat(from, &stat_buff))
82  {
83  errno=errno;
84  goto err;
85  }
86  if (MyFlags & MY_HOLD_ORIGINAL_MODES && new_file_stat)
87  stat_buff=new_stat_buff;
88  create_flag= (MyFlags & MY_DONT_OVERWRITE_FILE) ? O_EXCL : O_TRUNC;
89 
90  if ((to_file= my_create(to,(int) stat_buff.st_mode,
91  O_WRONLY | create_flag,
92  MyFlags)) < 0)
93  goto err;
94 
95  while ((Count= static_cast<uint32_t>(my_read(from_file, buff,
96  sizeof(buff), MyFlags))) != 0)
97  {
98  if (Count == (uint32_t) -1 ||
99  my_write(to_file,buff,Count,MYF(MyFlags | MY_NABP)))
100  goto err;
101  }
102 
103  if (my_close(from_file,MyFlags) | my_close(to_file,MyFlags))
104  return(-1); /* Error on close */
105 
106  /* Copy modes if possible */
107 
108  if (MyFlags & MY_HOLD_ORIGINAL_MODES && !new_file_stat)
109  return 0; /* File copyed but not stat */
110  chmod(to, stat_buff.st_mode & 07777); /* Copy modes */
111  if(chown(to, stat_buff.st_uid,stat_buff.st_gid)!=0)
112  return 0;
113  if (MyFlags & MY_COPYTIME)
114  {
115  struct utimbuf timep;
116  timep.actime = stat_buff.st_atime;
117  timep.modtime = stat_buff.st_mtime;
118  utime((char*) to, &timep); /* last accessed and modified times */
119  }
120  return 0;
121  }
122 
123 err:
124  if (from_file >= 0) my_close(from_file,MyFlags);
125  if (to_file >= 0)
126  {
127  my_close(to_file, MyFlags);
128  /* attempt to delete the to-file we've partially written */
129  my_delete(to, MyFlags);
130  }
131  return(-1);
132 } /* my_copy */
133 
134 } /* namespace internal */
135 } /* namespace drizzled */
TODO: Rename this file - func.h is stupid.