int my_rename_with_symlink(const char *from, const char *to, myf MyFlags)
{
#ifndef HAVE_READLINK
return my_rename(from, to, MyFlags);
#else
char link_name[FN_REFLEN], tmp_name[FN_REFLEN];
int was_symlink= (!my_disable_symlinks &&
!my_readlink(link_name, from, MYF(0)));
int result=0;
int name_is_different;
DBUG_ENTER("my_rename_with_symlink");
if (!was_symlink)
DBUG_RETURN(my_rename(from, to, MyFlags));
/* Change filename that symlink pointed to */
strmov(tmp_name, to);
fn_same(tmp_name,link_name,1); /* Copy dir */
name_is_different= strcmp(link_name, tmp_name);
if (name_is_different && !access(tmp_name, F_OK))
{
my_errno= EEXIST;
if (MyFlags & MY_WME)
my_error(EE_CANTCREATEFILE, MYF(0), tmp_name, EEXIST);
DBUG_RETURN(1);
}
/* Create new symlink */
if (my_symlink(tmp_name, to, MyFlags))
DBUG_RETURN(1);
/*
Rename symlinked file if the base name didn't change.
This can happen if you use this function where 'from' and 'to' has
the same basename and different directories.
*/
if (name_is_different && my_rename(link_name, tmp_name, MyFlags))
{
int save_errno=my_errno;
my_delete(to, MyFlags); /* Remove created symlink */
my_errno=save_errno;
DBUG_RETURN(1);
}
/* Remove original symlink */
if (my_delete(from, MyFlags))
{
int save_errno=my_errno;
/* Remove created link */
my_delete(to, MyFlags);
/* Rename file back */
if (strcmp(link_name, tmp_name))
(void) my_rename(tmp_name, link_name, MyFlags);
my_errno=save_errno;
result= 1;
}
DBUG_RETURN(result);
#endif /* HAVE_READLINK */
}
int myrg_create(const char *name, const char **table_names,
uint insert_method, my_bool fix_names)
{
int save_errno;
uint errpos;
File file;
char buff[FN_REFLEN],*end;
DBUG_ENTER("myrg_create");
errpos=0;
if ((file= mysql_file_create(rg_key_file_MRG,
fn_format(buff, name, "", MYRG_NAME_EXT,
MY_UNPACK_FILENAME|MY_APPEND_EXT), 0,
O_RDWR | O_EXCL | O_NOFOLLOW, MYF(MY_WME))) < 0)
goto err;
errpos=1;
if (table_names)
{
for ( ; *table_names ; table_names++)
{
my_stpcpy(buff,*table_names);
if (fix_names)
fn_same(buff,name,4);
*(end=strend(buff))='\n';
end[1]=0;
if (mysql_file_write(file, (uchar*) buff, (uint) (end-buff+1),
MYF(MY_WME | MY_NABP)))
goto err;
}
}
if (insert_method != MERGE_INSERT_DISABLED)
{
end=strxmov(buff,"#INSERT_METHOD=",
get_type(&merge_insert_method,insert_method-1),"\n",NullS);
if (mysql_file_write(file, (uchar*) buff, (uint) (end-buff),
MYF(MY_WME | MY_NABP)))
goto err;
}
if (mysql_file_close(file, MYF(0)))
goto err;
DBUG_RETURN(0);
err:
save_errno=my_errno() ? my_errno() : -1;
switch (errpos) {
case 1:
(void) mysql_file_close(file, MYF(0));
}
set_my_errno(save_errno);
DBUG_RETURN(save_errno);
} /* myrg_create */
int myrg_create(const char *name, const char **table_names,
uint insert_method, my_bool fix_names)
{
int save_errno;
uint errpos;
File file;
char buff[FN_REFLEN],*end;
DBUG_ENTER("myrg_create");
errpos=0;
if ((file = my_create(fn_format(buff,name,"",MYRG_NAME_EXT,4),0,
O_RDWR | O_TRUNC,MYF(MY_WME))) < 0)
goto err;
errpos=1;
if (table_names)
{
for ( ; *table_names ; table_names++)
{
strmov(buff,*table_names);
if (fix_names)
fn_same(buff,name,4);
*(end=strend(buff))='\n';
end[1]=0;
if (my_write(file,buff,(uint) (end-buff+1),
MYF(MY_WME | MY_NABP)))
goto err;
}
}
if (insert_method != MERGE_INSERT_DISABLED)
{
end=strxmov(buff,"#INSERT_METHOD=",
get_type(&merge_insert_method,insert_method-1),"\n",NullS);
if (my_write(file,buff,(uint) (end-buff),MYF(MY_WME | MY_NABP)))
goto err;
}
if (my_close(file,MYF(0)))
goto err;
DBUG_RETURN(0);
err:
save_errno=my_errno ? my_errno : -1;
switch (errpos) {
case 1:
VOID(my_close(file,MYF(0)));
}
DBUG_RETURN(my_errno=save_errno);
} /* myrg_create */
int mrg_create(const char *name, const char**table_names)
{
int save_errno;
uint errpos;
File file;
char buff[FN_REFLEN],*end;
DBUG_ENTER("mrg_create");
errpos=0;
if ((file = my_create(fn_format(buff,name,"",MRG_NAME_EXT,4),0,
O_RDWR | O_TRUNC,MYF(MY_WME))) < 0)
goto err;
errpos=1;
if (table_names)
for ( ; *table_names ; table_names++)
{
strmov(buff,*table_names);
fn_same(buff,name,4);
*(end=strend(buff))='\n';
if (my_write(file,*table_names,(uint) (end-buff+1),
MYF(MY_WME | MY_NABP)))
goto err;
}
if (my_close(file,MYF(0)))
goto err;
DBUG_RETURN(0);
err:
save_errno=my_errno;
switch (errpos) {
case 1:
VOID(my_close(file,MYF(0)));
}
my_errno=save_errno; /* Return right errocode */
DBUG_RETURN(-1);
} /* mrg_create */
