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/* 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 */
#include "mysys_priv.h"
#include <m_string.h>
#include "my_static.h"
#include "mysys_err.h"
#include <errno.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef HAVE_TEMPNAM
#if !defined(MSDOS) && !defined(OS2) && !defined(__NETWARE__)
extern char **environ;
#endif
#endif
/*
Create a temporary file in a given directory
This function should be used instead of my_tempnam() !
*/
File create_temp_file(char *to, const char *dir, const char *prefix,
int mode __attribute__((unused)),
myf MyFlags __attribute__((unused)))
{
File file= -1;
DBUG_ENTER("create_temp_file");
#if defined(_MSC_VER)
{
char temp[FN_REFLEN],*end,*res,**old_env,*temp_env[1];
old_env=environ;
if (dir)
{
end=strend(dir)-1;
if (!dir[0])
{ /* Change empty string to current dir */
to[0]= FN_CURLIB;
to[1]= 0;
dir=to;
}
else if (*end == FN_DEVCHAR)
{ /* Get current dir for drive */
_fullpath(temp,dir,FN_REFLEN);
dir=to;
}
else if (*end == FN_LIBCHAR && dir < end && end[-1] != FN_DEVCHAR)
{
strmake(to,dir,(uint) (end-dir)); /* Copy and remove last '\' */
dir=to;
}
environ=temp_env; /* Force use of dir (dir not checked) */
temp_env[0]=0;
}
if ((res=tempnam((char*) dir,(char *) prefix)))
{
strmake(to,res,FN_REFLEN-1);
(*free)(res);
file=my_create(to,0, mode | O_EXCL | O_NOFOLLOW, MyFlags);
}
environ=old_env;
}
#elif defined(_ZTC__)
if (!dir)
dir=getenv("TMPDIR");
if ((res=tempnam((char*) dir,(char *) prefix)))
{
strmake(to,res,FN_REFLEN-1);
(*free)(res);
file=my_create(to, 0, mode | O_EXCL | O_NOFOLLOW, MyFlags);
}
#elif defined(HAVE_MKSTEMP) && !defined(__NETWARE__)
{
char prefix_buff[30];
uint pfx_len;
File org_file;
pfx_len= (uint) (strmov(strnmov(prefix_buff,
prefix ? prefix : "tmp.",
sizeof(prefix_buff)-7),"XXXXXX") -
prefix_buff);
if (!dir && ! (dir =getenv("TMPDIR")))
dir=P_tmpdir;
if (strlen(dir)+ pfx_len > FN_REFLEN-2)
{
errno=my_errno= ENAMETOOLONG;
DBUG_RETURN(file);
}
strmov(convert_dirname(to,dir,NullS),prefix_buff);
org_file=mkstemp(to);
file=my_register_filename(org_file, to, FILE_BY_MKSTEMP,
EE_CANTCREATEFILE, MyFlags);
/* If we didn't manage to register the name, remove the temp file */
if (org_file >= 0 && file < 0)
{
int tmp=my_errno;
(void) my_delete(to, MYF(MY_WME | ME_NOINPUT));
my_errno=tmp;
}
}
#elif defined(HAVE_TEMPNAM)
{
char *res,**old_env,*temp_env[1];
if (dir && !dir[0])
{ /* Change empty string to current dir */
to[0]= FN_CURLIB;
to[1]= 0;
dir=to;
}
#ifdef OS2
/* changing environ variable doesn't work with VACPP */
char buffer[256], *end;
buffer[sizeof(buffer)-1]= 0;
end= strxnmov(buffer, sizeof(buffer)-1, (char*) "TMP=", dir, NullS);
/* remove ending backslash */
if (end[-1] == '\\')
end[-1]= 0;
putenv(buffer);
#elif !defined(__NETWARE__)
old_env= (char**) environ;
if (dir)
{ /* Don't use TMPDIR if dir is given */
environ=(const char**) temp_env;
temp_env[0]=0;
}
#endif
if ((res=tempnam((char*) dir, (char*) prefix)))
{
strmake(to,res,FN_REFLEN-1);
(*free)(res);
file=my_create(to,0,
(int) (O_RDWR | O_BINARY | O_TRUNC | O_EXCL | O_NOFOLLOW |
O_TEMPORARY | O_SHORT_LIVED),
MYF(MY_WME));
}
else
{
DBUG_PRINT("error",("Got error: %d from tempnam",errno));
}
#if !defined(OS2) && !defined(__NETWARE__)
environ=(const char**) old_env;
#endif
}
#else
{
register long uniq;
register int length;
my_string pos,end_pos;
/* Make an unique number */
pthread_mutex_lock(&THR_LOCK_open);
uniq= ((long) getpid() << 20) + (long) _my_tempnam_used++ ;
pthread_mutex_unlock(&THR_LOCK_open);
if (!dir && !(dir=getenv("TMPDIR"))) /* Use this if possibly */
dir=P_tmpdir; /* Use system default */
length=strlen(dir)+strlen(pfx)+1;
DBUG_PRINT("test",("mallocing %d byte",length+8+sizeof(TMP_EXT)+1));
if (length+8+sizeof(TMP_EXT)+1 > FN_REFLENGTH)
errno=my_errno= ENAMETOOLONG;
else
{
end_pos=strmov(to,dir);
if (end_pos != to && end_pos[-1] != FN_LIBCHAR)
*end_pos++=FN_LIBCHAR;
end_pos=strmov(end_pos,pfx);
for (length=0 ; length < 8 && uniq ; length++)
{
*end_pos++= _dig_vec_upper[(int) (uniq & 31)];
uniq >>= 5;
}
(void) strmov(end_pos,TMP_EXT);
file=my_create(to,0,
(int) (O_RDWR | O_BINARY | O_TRUNC | O_EXCL | O_NOFOLLOW |
O_TEMPORARY | O_SHORT_LIVED),
MYF(MY_WME));
}
}
#endif
if (file >= 0)
thread_safe_increment(my_tmp_file_created,&THR_LOCK_open);
DBUG_RETURN(file);
}
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