Description:
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Dear php Team,

We are using php 5.2.13 and Safe_mod is ON.

we have a problem using tempnam, at first we had tempnam('',tempfile); 
This did not work - error "can not access /tmp

Later I investigated and have written the testscript and have following behavior. Attention script must be owned by non root user

the script with 7th line $tmp_name = tempnam ( 'tmp', 'tempname' ); works fine also with safe_mode

when i change it to $tmp_name = tempnam ( '/tmp', 'tempname' ); a safe_mode restriction takes effect (the one with compares UID/GID and puts out 
Warning: tempnam() [function.tempnam]: SAFE MODE Restriction in effect. The script whose uid/gid is 506/506 is not allowed to access /tmp owned by uid/gid 0/0 in /home/httpd/html/default/tempfile.php on line 7

but why does it work without the beginning '/'?
Can you clarify this behavior please? and another issuse is that when i try with $tmp_name = tempnam ( '/tmp', 'tempname' ); it does not make a diference putting /tmp to openbasedir or safe_mode_includedir it dies not work.


I have also read the changelog and have found that since PHP 5.2.12 some issues with tempname and safe_mode have been fixed - there was a bug that tempnam ignores safe_mode. And this correct because i tested with php 5.2.11 and it worked with /tmp also. Can you tell me ehat exactly is changed saince version 5.2.12?




Test script:
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<?PHP

$xx = sys_get_temp_dir();
echo $xx . '<br>';
for ( $x = 0; $x <= 5; $x++ )
{
  $tmp_name = tempnam ( 'tmp', 'tempname' );
  echo $tmp_name . '<br>';
}
$str = 'standing in a tempfile';
$tmp_file = fopen ( $tmp_name, 'w' );
fputs ( $tmp_file, $str );
fclose ( $tmp_file );
$fp = fopen ( $tmp_name, 'r' );
$str = fgets ( $fp, 50 );
fclose ( $fp );
echo $str;
?>

Expected result:
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script above works fine also in safe mode change 7th line from
$tmp_name = tempnam ( 'tmp', 'tempname' );
to
$tmp_name = tempnam ( '/tmp', 'tempname' ); bringe a safe_mode restriction which is also ok, but why does it work without / and why does it not make a diference putting /tmp to openbasedir or safe_mode_include_dir