reactos/posix/lib/psxdll/unistd/dup.c
2002-10-29 04:45:58 +00:00

42 lines
770 B
C

/* $Id: dup.c,v 1.4 2002/10/29 04:45:46 rex Exp $
*/
/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS POSIX+ Subsystem
* FILE: subsys/psx/lib/psxdll/unistd/dup.c
* PURPOSE: Duplicate an open file descriptor
* PROGRAMMER: KJK::Hyperion <noog@libero.it>
* UPDATE HISTORY:
* 13/02/2002: Created
*/
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
int dup(int fildes)
{
return (fcntl(fildes, F_DUPFD, 0));
}
int dup2(int fildes, int fildes2)
{
if(fildes < 0 || fildes >= OPEN_MAX)
{
errno = EBADF;
return (-1);
}
/* TODO: check if fildes is valid */
if(fildes == fildes2)
return fildes2;
close(fildes2);
return (fcntl(fildes, F_DUPFD, fildes2));
}
/* EOF */