/****************************************************************************
*
*                            Open Watcom Project
*
*    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
*  ========================================================================
*
*    This file contains Original Code and/or Modifications of Original
*    Code as defined in and that are subject to the Sybase Open Watcom
*    Public License version 1.0 (the 'License'). You may not use this file
*    except in compliance with the License. BY USING THIS FILE YOU AGREE TO
*    ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
*    provided with the Original Code and Modifications, and is also
*    available at www.sybase.com/developer/opensource.
*
*    The Original Code and all software distributed under the License are
*    distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
*    EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
*    ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
*    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
*    NON-INFRINGEMENT. Please see the License for the specific language
*    governing rights and limitations under the License.
*
*  ========================================================================
*
* Description:  WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE
*               DESCRIBE IT HERE!
*
****************************************************************************/


#include "variety.h"
#include <string.h>
#include <unistd.h>
#include <errno.h>

extern  char ** _argv;  /* argument vector */

/*
   NOTE: This file isn't used for QNX. It's got it's own version.
*/

#ifdef __LINUX__

_WCRTLINK char *_cmdname( char *name )
{
    int save_errno = errno;
    int result = readlink("/proc/self/exe", name, PATH_MAX);
    
    errno = save_errno;
    
    /* fall back to argv[0] if readlink doesn't work */
    if (result == -1 || result == PATH_MAX)
        return( strcpy( name, _argv[0] ) );

    /* readlink does not add a NUL so we need to do it ourselves */
    name[result] = '\0';
    return name;
}

#else

_WCRTLINK char *_cmdname( char *name )
{
    return( strcpy( name, _argv[0] ) );
}

#endif
