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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libc/] [dup2.c] - Rev 173
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/* * dup2() - POSIX 1003.1b 6.2.1 Duplicate an Open File Descriptor * * COPYRIGHT (c) 1989-1999. * On-Line Applications Research Corporation (OAR). * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://www.OARcorp.com/rtems/license.html. * * $Id: dup2.c,v 1.2 2001-09-27 12:01:15 chris Exp $ */ #include <unistd.h> #include <fcntl.h> #include "libio_.h" int dup2( int fildes, int fildes2 ) { int status; struct stat buf; /* * If fildes is not valid, then fildes2 should not be closed. */ status = fstat( fildes, &buf ); if ( status == -1 ) return -1; /* * If fildes2 is not valid, then we should not do anything either. */ status = fstat( fildes2, &buf ); if ( status == -1 ) return -1; /* * This fcntl handles everything else. */ return fcntl( fildes, F_DUPFD, fildes2 ); }