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From: Doug Kaufman <dkaufman AT rahul DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem with UNRAR
Date: Thu, 6 Jan 2005 05:18:57 +0000 (UTC)
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"Eli Zaretskii" <eliz AT gnu DOT org> writes:

>> From: Doug Kaufman <dkaufman AT rahul DOT net>
>> Date: Wed, 5 Jan 2005 20:45:48 +0000 (UTC)
>> 
>> +#ifdef __DJGPP__
>> +  {
>> +    __dpmi_regs regs;
>> +    memset(&regs,0,sizeof(regs));
>> +    regs.h.ah=0x36;
>> +    regs.h.dl=Drive;
>> +    __dpmi_int (0x21, &regs);
>> +    if (regs.x.ax==0xffff)
>> +      return(1457664);
>> +    Int64 FreeSize=regs.x.ax*regs.x.cx;
>> +    FreeSize=FreeSize*regs.x.bx;
>> +    return(FreeSize);
>> +  }
>> +#else

>Why work so hard when DJGPP has the `statfs' function which will return
>the disk free space?

I just modified the author's code to use __dpmi_int instead of the
_int86 in the original code. I didn't think about more efficient ways to
do it. Thanks for the suggestion. I presume that you are talking about
doing something like:
struct statfs fs;
statfs(Drive, &fs);
FreeSize=fs.f_bfree*fs.f_bsize;
return(FreeSize);

I am not a programmer, so I am usually happy just to get something to
work for me when I try to port a program. I'll try to remember that we
have statfs if the need arises with other programs.

                     Doug
-- 
Doug Kaufman
Internet: dkaufman AT rahul DOT net