Table of Contents
Advertisement
set in Fsfirst() is found, you can obtain information about
additional files with the function Fsnext():
int status;
status = Fsnext();
where status indicates whether another file having the file
specification and attributes given in the Fsfirst() call was
found. If such a file was found, a 0 is returned in status, and
information about the file is stored in the buffer pointed to by
the DTA. If no matching file was found, a DOS error num
ber such as ENMFIL is returned (see Appendix D). Use of this
call assumes that the DTA points to a buffer that contains
information from a previous Fsfirst() call. The filename used
by the previous Fsfirst() call must also have contained one
or more wildcards (? or *) in order for Fsnext() to succeed.
The amount for free space is another useful bit of infor
mation you might wish to obtain about a disk. Find this with
the function whose macro name is Dfree(). The function is
called like this:
long buffer[4];
int drivenum;
Dfree(buffer, drivenum);
where drivenum specifies the drive to check (A = 0, B = 1,
and so on). The information about the drive is returned in
four longwords in the buffer array. The information contained
in this array is:
Element Number
0
1
2
3
For large hard drives, this function is extremely slow,
and may take as much as several seconds to complete.
File Manipulation Functions
GEMDOS supports some common file manipulation opera
tions like deleting a file or renaming it, and some not-so-
common ones, like setting or getting the time and date-
stamp, or file attributes. The function Fdelete() is used to
delete a file. It's called like this:
CHAPTER 6
Contents
Number of free clusters
Total number of clusters on drive
Sector size (in bytes)
Cluster size (in sectors)
Hide quick links:
Advertisement
Table of Contents
