DOCUMENT:Q46131 03-MAY-2001 [visualc] TITLE :DOC: tmpnam() Operation Does Not Change If P_tmpdir Modified PRODUCT :Microsoft C Compiler PROD/VER:winnt:1.0,2.0,4.0,4.1,5.0,6.0 OPER/SYS: KEYWORDS:kbdocfix kbdocerr kbVC100 kbVC150 kbVC200 kbVC400 kbVC410 kbVC500 kbVC600 ====================================================================== ------------------------------------------------------------------------------- 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 ------------------------------------------------------------------------------- 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 ====================================================================== 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 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.