diff options
Diffstat (limited to '')
-rw-r--r-- | cpukit/libcsupport/src/ioctl.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/ioctl.c b/cpukit/libcsupport/src/ioctl.c new file mode 100644 index 0000000000..0aaf0379ae --- /dev/null +++ b/cpukit/libcsupport/src/ioctl.c @@ -0,0 +1,57 @@ +/* + * ioctl() system call + * + * This routine is not defined in the POSIX 1003.1b standard but is + * commonly supported on most UNIX and POSIX systems. + * + * COPYRIGHT (c) 1989-1998. + * On-Line Applications Research Corporation (OAR). + * Copyright assigned to U.S. Government, 1994. + * + * 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. + * + * $Id$ + */ + +#include "libio_.h" + +int ioctl( + int fd, + unsigned32 command, + void * buffer +) +{ + rtems_status_code rc; + rtems_libio_t *iop; + + /* + * If this file descriptor is mapped to an external set of handlers, + * then pass the request on to them. + */ + + if ( rtems_file_descriptor_type( fd ) ) { + rtems_libio_ioctl_t fp; + + fp = rtems_libio_handlers[rtems_file_descriptor_type_index(fd)].ioctl; + if ( fp == NULL ) + set_errno_and_return_minus_one( EBADF ); + + return (*fp)( fd, command, buffer ); + } + + /* + * Now process the ioctl(). + */ + + iop = rtems_libio_iop( fd ); + rtems_libio_check_fd( fd ); + + if ( !iop->handlers->ioctl ) + set_errno_and_return_minus_one( ENOTSUP ); + + rc = (*iop->handlers->ioctl)( iop, command, buffer ); + + return rc; +} |