Good day, all:
I got tired of struggling with drive letters and TDSK. I have written
a short C program which scans volume names for drives
C: through Z: (A: and B: were prompting for floppy insertions). By
default, it looks for the name "TURBODSK" from TDSK. However,
it accepts an argument of a name to look for...for example
findtdsk FDOS_BETA9
This program returns the drive letter in the DOS ERRORLEVEL and
prints the volume found to stderr.
I have also included a batch file to print out the drive letter.
I based this on a public domain example and release it into the
public domain. I built it under Windows using Open Watcom.
I could easily modify this to have the "turbodat" behavior and
create a file. However, the ERRORLEVEL return fits my requirements
better.
If anyone needs an executable, I can send it to you.
Mark Bailey
The C source file is:
/*
**
** findtdsk.c - finds the first FREEDOS TDSK RAM DRIVE (label TURBODSK)
** by scanning all drive letters from A: to Z:
**
** takes an optional argument, VOLNAME, which is the name of a disk volume to
** search for
**
** Returns the number corresponding to the disk with the correct volume name
** (MSDOS ERRORLEVEL: 0=A, 1=B, ... , 25=Z
**
** Released into the Public Domain
** Mark Bailey 21 March 2005
**
** Based on GETVOL.C from Bob Stout
** GETVOL.C - Retrieve a disk volume label
** (proof you don't need FCBs to do it!)
**
** public domain demo by Bob Stout
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dos.h>
#include <io.h>
#include <direct.h>
#if defined(__ZTC__)
#pragma ZTC align 1
#else /* MSC/QC/WATCOM/METAWARE */
#pragma pack(1)
#endif
#define SUCCESS 0
char *getvol(char drive)
{
char search[] = "A:\\*.*";
static struct find_t ff;
*search = drive;
if (SUCCESS == _dos_findfirst(search, _A_VOLID, &ff))
{
if (8 < strlen(ff.name)) /* Eliminate period */
strcpy(&ff.name[8], &ff.name[9]);
return ff.name;
}
else return NULL;
}
int main(int argc, char *argv[])
{
char *label;
char drive;
int i;
char *volname;
if (strcmp(argv[1],"/?") == 0)
{
puts("\aUsage: FINDTDSK [VOLNAME]\n"
"Where VOLNAME is an optional volume name to search for\n"
"The default VOLNAME is TURBODSK"
);
return -1;
}
else if (argv[1] != NULL)
volname = argv[1];
else
volname = "TURBODSK";
/*
* Do not check drives A and B
*/
for (i=2;i<26;i++)
{
drive = (char) (i+(int) 'A');
label = getvol(drive);
if (strcmp(volname,label)==0)
{
fprintf(stderr,"Disk %c has label %s\n",drive,label);
return (i);
}
}
return -1;
}
and a simple batch test file is:
echo off
findtdsk
if %ERRORLEVEL%==-1 echo "Not found"
if %ERRORLEVEL%==0 echo "A:"
if %ERRORLEVEL%==1 echo "B:"
if %ERRORLEVEL%==2 echo "C:"
if %ERRORLEVEL%==3 echo "D:"
if %ERRORLEVEL%==4 echo "E:"
if %ERRORLEVEL%==5 echo "F:"
if %ERRORLEVEL%==6 echo "G:"
if %ERRORLEVEL%==7 echo "H:"
if %ERRORLEVEL%==8 echo "I:"
if %ERRORLEVEL%==9 echo "J:"
if %ERRORLEVEL%==10 echo "K:"
if %ERRORLEVEL%==11 echo "L:"
if %ERRORLEVEL%==12 echo "M:"
if %ERRORLEVEL%==13 echo "N:"
if %ERRORLEVEL%==14 echo "O:"
if %ERRORLEVEL%==15 echo "P:"
if %ERRORLEVEL%==16 echo "Q:"
if %ERRORLEVEL%==17 echo "R:"
if %ERRORLEVEL%==18 echo "S:"
if %ERRORLEVEL%==29 echo "T:"
if %ERRORLEVEL%==20 echo "U:"
if %ERRORLEVEL%==21 echo "V:"
if %ERRORLEVEL%==22 echo "W:"
if %ERRORLEVEL%==23 echo "X:"
if %ERRORLEVEL%==24 echo "Y:"
if %ERRORLEVEL%==25 echo "Z:"
echo on
-------------------------------------------------------
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