1. RE: Linux question
Irv Mullins wrote:
>
> I need to create unique temporary files, which I can do using
> mktemp , i.e. system_exec('mktemp myprog.XXXXXX',0)
>
> The question is, how do I find out what name mktemp has used
> to create my file? The name is normally printed on the console,
> and I don't kow how to redirect that so Euphoria can get to it.
>
> Thanks,
> Irv
>
>
You could create the filename yourself, after doing a dir()
like i did in my "EuViewer" "copy.ew" currently on the RDS site
download section, in which you append a chosen char untill the
name is unique, or you could use the following win api function:
UINT GetTempFileName(
LPCTSTR lpPathName, // address of directory name for
temporary file
LPCTSTR lpPrefixString, // address of filename prefix
UINT uUnique, // number used to create temporary filename
LPTSTR lpTempFileName // address of buffer that receives
the new filename
);
(note this only gets a filename, doesnt open a file in some cases)
Parameters:
lpPathName:
Points to a null-terminated string that specifies the directory path for
the filename. This string must consist of characters in the ANSI
character set. Applications typically specify a period (.) or the result
of the GetTempPath function for this parameter. If this parameter is
NULL, the function fails.
lpPrefixString:
Points to a null-terminated prefix string. The function uses the first
three characters of this string as the prefix of the filename. This
string must consist of characters in the ANSI character set.
uUnique:
Specifies an unsigned integer that the function converts to a
hexadecimal string for use in creating the temporary filename.
If uUnique is nonzero, the function appends the hexadecimal string to
lpPrefixString to form the temporary filename. In this case, the
function does not create the specified file, and does not test whether
the filename is unique.
If uUnique is zero, the function uses a hexadecimal string derived from
the current system time. In this case, the function uses different
values until it finds a unique filename, and then it creates the file in
the lpPathName directory.
lpTempFileName:
Points to the buffer that receives the temporary filename. This
null-terminated string consists of characters in the ANSI character set.
This buffer should be at least the length, in bytes, specified by
MAX_PATH to accommodate the path.
Return Value:
If the function succeeds, the return value specifies the unique numeric
value used in the temporary filename. If the uUnique parameter is
nonzero, the return value specifies that same number.
If the function fails, the return value is zero. To get extended error
information, call GetLastError.
Remarks:
The GetTempFileName function creates a temporary filename of the
following form:
path\preuuuu.TMP
The following table describes the filename syntax:
Component Meaning
path Path specified by the lpPathName parameter
pre First three letters of the lpPrefixString string
uuuu Hexadecimal value of uUnique
When Windows shuts down, temporary files whose names have been created
by this function are not automatically deleted.
To avoid problems resulting from converting an ANSI character set string
to a Windows string, an application should call the CreateFile function
to create a temporary file.
If the uUnique parameter is zero, GetTempFileName attempts to form a
unique number based on the current system time. If a file with the
resulting filename exists, the number is increased by one and the test
for existence is repeated. Testing continues until a unique filename is
found. GetTempFileName then creates a file by that name and closes it.
When uUnique is nonzero, no attempt is made to create and open the file.
Im sure there are other ways too 
Good luck with it.
--Al
