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Q46131: DOC: tmpnam() Operation Does Not Change If P_tmpdir Modified

Article: Q46131
Product(s): Microsoft C Compiler
Version(s): winnt:1.0,2.0,4.0,4.1,5.0,6.0
Operating System(s): 
Keyword(s): kbdocfix kbdocerr kbVC100 kbVC150 kbVC200 kbVC400 kbVC410 kbVC500 kbVC600
Last Modified: 03-MAY-2001

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The information in this article applies to:

- The C Run-Time (CRT), used with:
   - Microsoft C for MS-DOS, versions 5.1, 6.0, 6.0a, and 6.0ax 
   - Microsoft C for OS/2, versions 6.0, and 6.0a 
   - Microsoft C/C++ for MS-DOS 
   - Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5 
   - Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 4.0, 4.1, 5.0, 6.0 
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SUMMARY
=======

In Microsoft C, the documentation for the functions tmpnam(), tempnam() and
_tempnam() states that under certain conditions they create a name that consists
of the path prefix defined by the P_tmpdir entry in STDIO.H. This is ambiguous.
A better way of stating this is that they create a name that consists of a path
prefix to the root of the current drive; this is also what P_tmpdir is defined
as. However, P_tmpdir is defined as the root directory on the default drive,
which is where the created name would reside. However, any modification of
P_tmpdir in STDIO.H does not change the filename that is created.

The documentation states that changing the definition of P_tmpdir or L_tmpnam
does not change the operation of tmpnam(). Nor does it change the operation of
tempnam() or _tempnam(). These two defines are provided only for XENIX/UNIX
portability. The three functions tmpnam(), tempnam() and _tempnam() do not make
use of these two defines.

Additional query words: kbCRT kbVC100 kbVC150 kbVC200 kbVC400 kbVC410 kbVC500 kbDSupport

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Keywords          : kbdocfix kbdocerr kbVC100 kbVC150 kbVC200 kbVC400 kbVC410 kbVC500 kbVC600 
Technology        : kbVCsearch kbAudDeveloper kbCRT
Version           : winnt:1.0,2.0,4.0,4.1,5.0,6.0

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