From 19a627f3a45e6df12bd598b94afe562f8f5c6303 Mon Sep 17 00:00:00 2001 From: Konstantin Belousov Date: Thu, 22 Apr 2021 22:40:08 +0300 Subject: [PATCH] ioccom: define ioctl cmd value that can never be valid Its use is for cases where some filler is needed for cmd, or we need an indication that there were no cmd supplied, and so on. Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D29935 --- newlib/libc/sys/rtems/include/sys/ioccom.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/newlib/libc/sys/rtems/include/sys/ioccom.h b/newlib/libc/sys/rtems/include/sys/ioccom.h index adaa30797..7b78db8e9 100644 --- a/newlib/libc/sys/rtems/include/sys/ioccom.h +++ b/newlib/libc/sys/rtems/include/sys/ioccom.h @@ -84,6 +84,9 @@ typedef unsigned long ioctl_command_t; #define IOCPARM_IVAL(x) ((int)(intptr_t)(void *)*(caddr_t *)(void *)(x)) #endif +#define _IOC_INVALID (_IOC_VOID|_IOC_INOUT) /* Never valid cmd value, + use as filler */ + #endif __BEGIN_DECLS