Microsoft KB Archive/43073

INFO: fopen() Accepts Filenames with Embedded Spaces Article ID: Q43073 The information in this article applies to: The C Run-time (CRT) included with: - Microsoft C for MS-DOS, versions 5.1, 6.0, 6.0a, 6.0ax - Microsoft C/C++ for MS-DOS, version 7.0 - Microsoft Visual C++ for Windows, versions 1.0, 1.5 - Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 2.1, 4.0, 5.0 SUMMARY The Microsoft Run-time library functions fopen() and open() do not screen for invalid filenames. These functions will accept a filename string with an embedded space. This behavior is expected and occurs with MS-DOS, OS/2 and Windows NT. The CRT functions fopen() and open() are not tasked with validating the filenames passed to them; this is the responsibility of the calling program. For more information, please refer to the online or hard copy "Run- Time Library Reference" provided with the Microsoft products listed above. Unfortunately, under MS-DOS, the creation of a file whose name contains an embedded space may cause some difficulties. The simplest way to delete such a file is to use wildcard syntax, such as: del *.dat The following sample code creates a file named "he llo.dat" (without the quotation marks). Sample Code #include <stdio.h> FILE *fh; void main(void) { fh = fopen ("he llo.dat", "w+"); fclose(fh); } Keywords  : kbcode kbCRT kbVC Version  : MS-DOS:5.1,6.0,6.00a,6.00ax,7.0; WINDOWS:1.0,1.5; WINDOWS NT:1.0,2.0,2.1,4.0,5.0 Platform  : MS-DOS NT WINDOWS

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