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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [readlink.c] - Blame information for rev 773

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Line No. Rev Author Line
1 30 unneback
/*
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 *  readlink() - POSIX 1003.1b - X.X.X - XXX
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 *
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: readlink.c,v 1.2 2001-09-27 12:01:15 chris Exp $
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 */
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#include "libio_.h"
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int readlink(
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  const char *pathname,
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  char       *buf,
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  int         bufsize
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)
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{
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  rtems_filesystem_location_info_t  loc;
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  int                               result;
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  if (!buf)
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    set_errno_and_return_minus_one( EFAULT );
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  result = rtems_filesystem_evaluate_path( pathname, 0, &loc, FALSE );
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  if ( result != 0 )
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     return -1;
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  if ( !loc.ops->node_type ){
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    rtems_filesystem_freenode( &loc );
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    set_errno_and_return_minus_one( ENOTSUP );
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  }
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  if (  (*loc.ops->node_type)( &loc ) != RTEMS_FILESYSTEM_SYM_LINK ){
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    rtems_filesystem_freenode( &loc );
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    set_errno_and_return_minus_one( EINVAL );
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  }
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  if ( !loc.ops->readlink ){
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    rtems_filesystem_freenode( &loc );
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    set_errno_and_return_minus_one( ENOTSUP );
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  }
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  result =  (*loc.ops->readlink)( &loc, buf, bufsize );
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  rtems_filesystem_freenode( &loc );
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  return result;
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}

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