diff options
Diffstat (limited to 'cpukit/include/rtems/libio_.h')
| -rw-r--r-- | cpukit/include/rtems/libio_.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/cpukit/include/rtems/libio_.h b/cpukit/include/rtems/libio_.h index d595500430..995809b6d5 100644 --- a/cpukit/include/rtems/libio_.h +++ b/cpukit/include/rtems/libio_.h @@ -103,6 +103,20 @@ extern mode_t rtems_filesystem_umask; ((((unsigned32)(_fd)) < rtems_libio_number_iops) ? \ &rtems_libio_iops[_fd] : 0) +/* + * rtems_libio_check_is_open + * + * Macro to check if a file descriptor is actually open. + */ + +#define rtems_libio_check_is_open(_iop) \ + do { \ + if (((_iop)->flags & LIBIO_FLAGS_OPEN) == 0) { \ + errno = EBADF; \ + return -1; \ + } \ + } while (0) + /* * rtems_libio_check_fd * @@ -118,7 +132,7 @@ extern mode_t rtems_filesystem_umask; } while (0) /* - * rtems_libio_check_fd + * rtems_libio_check_buffer * * Macro to check if a buffer pointer is valid. */ |