workbench/c/AddBuffers.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: AddBuffers CLI command
   6     Lang: English
   7 */
   8
   9
  10 /******************************************************************************
  11
  12     NAME
  13
  14         AddBuffers (drive) [(N)]
  15
  16     SYNOPSIS
  17
  18         DRIVE/A, BUFFERS/N
  19
  20     LOCATION
  21
  22         Workbench:C
  23
  24     FUNCTION
  25
  26         Add buffers to the list of available buffers for a specific
  27         drive. Adding buffers speeds disk access but has the drawback
  28         of using up system memory (512 bytes per buffer). Specifying
  29         a negative number subtracts buffers from the drive.
  30             If only the DRIVE argument is specified, the number of
  31         buffers for that drive are displayed without changing the buffer
  32         allocation.
  33
  34     INPUTS
  35
  36         DRIVE    --  the drive to alter the buffer allocation of
  37         BUFFERS  --  the number of buffers to add (or subtract in case of
  38                      a negative number) to a drive.
  39
  40     RESULT
  41
  42     NOTES
  43
  44     EXAMPLE
  45
  46     BUGS
  47
  48     SEE ALSO
  49
  50     INTERNALS
  51
  52     HISTORY
  53
  54 ******************************************************************************/
  55
  56 #include <stdio.h>
  57 #include <proto/dos.h>
  58 #include <dos/dos.h>
  59
  60
  61 static const char version[] = "$VER: AddBuffers 41.1 (18.2.1997)\n";
  62
  63 #define ARG_TEMPLATE "DRIVE/A,BUFFERS/N"
  64
  65 enum
  66 {
  67     ARG_DRIVE = 0,
  68     ARG_BUFFERS,
  69     NOOFARGS
  70 };
  71
  72
  73 int __nocommandline = 1;
  74
  75 int main(void)
  76 {
  77     IPTR           args[NOOFARGS] = { (IPTR)NULL, (IPTR)0 };
  78     struct RDArgs *rda;
  79
  80     int    result;
  81     int    error = RETURN_OK;
  82     ULONG  buffers = 0;
  83
  84     rda = ReadArgs(ARG_TEMPLATE, args, NULL);
  85
  86     if (rda != NULL)
  87     {
  88         STRPTR  drive = (STRPTR)args[ARG_DRIVE];
  89         ULONG  *bufsptr = (ULONG *)args[ARG_BUFFERS];
  90
  91         if (bufsptr != NULL)
  92         {
  93             buffers = *bufsptr;
  94         }
  95
  96         result = AddBuffers(drive, buffers);
  97
  98         if (result == -1)
  99         {
 100             Printf("%s has %ld buffers\n", drive, IoErr());
 101         }
 102         else if (result > 0)
 103         {
 104             Printf("%s has %ld buffers\n", drive, (LONG)result);
 105         }
 106         else
 107         {
 108             PrintFault(IoErr(), "AddBuffers");
 109             error = RETURN_FAIL;
 110         }
 111
 112         FreeArgs(rda);
 113     }
 114     else
 115     {
 116         PrintFault(IoErr(), "AddBuffers");
 117         error = RETURN_FAIL;
 118     }
 119
 120     return error;
 121 }