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

• 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
Version : winnt:1.0,2.0,4.0,4.1,5.0,6.0
Platform : winnt
Issue type :