DOC: mktemp() Creates a Maximum of 27 Unique Filenames (50351)
The information in this article applies to:
- The C Run-Time (CRT), when used with:
- Microsoft C for MS-DOS 5.1
- Microsoft C for MS-DOS 6.0
- Microsoft C for MS-DOS 6.0a
- Microsoft C for MS-DOS 6.0ax
- Microsoft C/C++ for MS-DOS 7.0
- Microsoft Visual C++, 32-bit Professional Edition 2.0
This article was previously published under Q50351 SUMMARY
In the Microsoft C online and printed documentation for the mktemp()
function, it is not clear exactly how many filenames mktemp() can create.
These references state the following:
When creating new names, mktemp uses, in order, "0" and the
lowercase letters "a" to "z".
This information is correct. However, the documentation fails to mention
that these are the only filenames that are created. Any further calls to
mktemp() after these characters have been used will fail (that is, once "z"
has been placed in the template). Therefore, the limit on the number of
unique filenames that can be created by mktemp() is 27.
NOTE: This problem was fixed in the Books On-line of Microsoft Visual C++,
32-bit Edition, version 4.0.
| Modification Type: | Major | Last Reviewed: | 12/12/2003 |
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| Keywords: | kbCRT kbdocfix KB50351 |
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