Microsoft KB Archive/58800

From BetaArchive Wiki

Using _dos_findfirst() Function to Retrieve Disk Volume


5.10 6.00 6.00a 6.00ax 7.00 | 1.00 1.50 MS-DOS | WINDOWS kbprg ---------------------------------------------------------------------- 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, and 6.0ax - Microsoft C/C++ for MS-DOS, versions 7.0 - Microsoft Visual C++ for Windows, version 1.0 and 1.5 ---------------------------------------------------------------------- SUMMARY ======= In Microsoft C, using the _dos_findfirst() function to find a disk volume with the _A_VOLID attribute gets the disk volume correctly unless the volume name is greater than eight characters. MORE INFORMATION ================ Volume labels are a specific type of directory entry specified by setting bit 3 in the attribute field to 1 or 0x08. They are a special type of file that can only be in the root directory. The maximum number of characters a volume label can have is 11 characters (8 characters for the filename followed by a three-character extension). The C run-time function _dos_findfirst() will return the volume label in an 8.3 file format because MS-DOS stores the volume label in the file format. For example, if a disk has a volume label of "A_LONG_NAME", calling _dos_findfirst() with the _A_VOLID attribute will return the volume label as "A_LONG_N.AME". Additional reference words: kbinf 5.10 6.00 6.00a 6.00ax 7.00 1.00 1.50 KBCategory: kbprg KBSubcategory: CRTIss

Keywords : kb16bitonly
Issue type :
Technology : kbVCsearch kbAudDeveloper kbCRT

Last Reviewed: May 5, 2001
© 2001 Microsoft Corporation. All rights reserved. Terms of Use.