rom/dos/getprompt.c

   1 /*
   2     Copyright © 1995-2001, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc: Get the current prompt.
   6     Lang: english
   7 */
   8 #include <proto/exec.h>
   9 #include <dos/dos.h>
  10 #include "dos_intern.h"
  11 #include <string.h>
  12
  13 /*****************************************************************************
  14
  15     NAME */
  16 #include <proto/dos.h>
  17
  18         AROS_LH2(BOOL, GetPrompt,
  19
  20 /*  SYNOPSIS */
  21         AROS_LHA(STRPTR, buf, D1),
  22         AROS_LHA(LONG  , len, D2),
  23
  24 /*  LOCATION */
  25         struct DosLibrary *, DOSBase, 98, Dos)
  26
  27 /*  FUNCTION
  28         Copies the prompt from the CLI structure into the buffer. If the
  29         buffer is too small the name is truncated, and a failure is returned.
  30         If the current process doesn't have a CLI structure, a 0 length string
  31         is put into the buffer and a failure is returned.
  32
  33     INPUTS
  34         buf - Buffer for the prompt.
  35         len - Size of the buffer in bytes.
  36
  37     RESULT
  38         !=0 on success, 0 on failure. IoErr() gives additional information
  39         in that case.
  40
  41     NOTES
  42
  43     EXAMPLE
  44
  45     BUGS
  46
  47     SEE ALSO
  48         SetPrompt()
  49
  50     INTERNALS
  51
  52 *****************************************************************************/
  53 {
  54     AROS_LIBFUNC_INIT
  55     AROS_LIBBASE_EXT_DECL(struct DosLibrary *,DOSBase)
  56
  57     struct Process *me = (struct Process *)FindTask(NULL);
  58     struct CommandLineInterface *cli = BADDR(me->pr_CLI);
  59     STRPTR cname;
  60     ULONG clen;
  61     BOOL ret = DOSTRUE;
  62
  63     if (cli == NULL)
  64     {
  65         if (len >= 1)
  66             buf[0] = '\0';
  67         me->pr_Result2 = ERROR_OBJECT_WRONG_TYPE;
  68         return DOSFALSE;
  69     }
  70
  71     cname = AROS_BSTR_ADDR(cli->cli_Prompt);
  72     clen = (ULONG)AROS_BSTR_strlen(cli->cli_Prompt);
  73     if (clen >= (len-1))
  74     {
  75         clen = len-1;
  76         me->pr_Result2 = ERROR_LINE_TOO_LONG;
  77         ret = DOSFALSE;
  78     }
  79     CopyMem(cname, buf, clen);
  80     buf[clen] = '\0';
  81
  82     return ret;
  83     AROS_LIBFUNC_EXIT
  84 } /* GetPrompt */