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/*
* fcntl() - POSIX 1003.1b 6.5.2 - File Control
*
* 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.rtems.com/license/LICENSE.
*
* $Id$
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdarg.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <rtems.h>
#include <rtems/libio_.h>
static int vfcntl(
int fd,
int cmd,
va_list ap
)
{
rtems_libio_t *iop;
rtems_libio_t *diop;
int fd2;
int flags;
int mask;
int ret = 0;
rtems_libio_check_fd( fd );
iop = rtems_libio_iop( fd );
rtems_libio_check_is_open(iop);
/*
* Now process the fcntl().
*/
/*
* This switch should contain all the cases from POSIX.
*/
switch ( cmd ) {
case F_DUPFD: /* dup */
fd2 = va_arg( ap, int );
if ( fd2 )
diop = rtems_libio_iop( fd2 );
else {
/* allocate a file control block */
diop = rtems_libio_allocate();
if ( diop == 0 ) {
ret = -1;
break;
}
}
diop->handlers = iop->handlers;
diop->file_info = iop->file_info;
diop->flags = iop->flags;
diop->pathinfo = iop->pathinfo;
ret = (int) (diop - rtems_libio_iops);
break;
case F_GETFD: /* get f_flags */
ret = ((iop->flags & LIBIO_FLAGS_CLOSE_ON_EXEC) != 0);
break;
case F_SETFD: /* set f_flags */
/*
* Interpret the third argument as the "close on exec()" flag.
* If this argument is 1, then the file descriptor is to be closed
* if a new process is exec()'ed. Since RTEMS does not support
* processes, then we can ignore this one except to make
* F_GETFD work.
*/
if ( va_arg( ap, int ) )
iop->flags |= LIBIO_FLAGS_CLOSE_ON_EXEC;
else
iop->flags &= ~LIBIO_FLAGS_CLOSE_ON_EXEC;
break;
case F_GETFL: /* more flags (cloexec) */
ret = rtems_libio_to_fcntl_flags( iop->flags );
break;
case F_SETFL:
flags = rtems_libio_fcntl_flags( va_arg( ap, int ) );
mask = LIBIO_FLAGS_NO_DELAY | LIBIO_FLAGS_APPEND;
/*
* XXX If we are turning on append, should we seek to the end?
*/
iop->flags = (iop->flags & ~mask) | (flags & mask);
break;
case F_GETLK:
errno = ENOTSUP;
ret = -1;
break;
case F_SETLK:
errno = ENOTSUP;
ret = -1;
break;
case F_SETLKW:
errno = ENOTSUP;
ret = -1;
break;
case F_SETOWN: /* for sockets. */
errno = ENOTSUP;
ret = -1;
break;
case F_GETOWN: /* for sockets. */
errno = ENOTSUP;
ret = -1;
break;
default:
errno = EINVAL;
ret = -1;
break;
}
/*
* If we got this far successfully, then we give the optional
* filesystem specific handler a chance to process this.
*/
if (ret >= 0) {
if (iop->handlers->fcntl_h) {
int err = (*iop->handlers->fcntl_h)( cmd, iop );
if (err) {
errno = err;
ret = -1;
}
}
}
return ret;
}
int fcntl(
int fd,
int cmd,
...
)
{
int ret;
va_list ap;
va_start( ap, cmd );
ret = vfcntl(fd,cmd,ap);
va_end(ap);
return ret;
}
/*
* _fcntl_r
*
* This is the Newlib dependent reentrant version of fcntl().
*/
#if defined(RTEMS_NEWLIB)
#include <reent.h>
int _fcntl_r(
struct _reent *ptr,
int fd,
int cmd,
int arg
)
{
return fcntl( fd, cmd, arg );
}
#endif
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