public inbox for newlib-cvs@sourceware.org
help / color / mirror / Atom feed
* [newlib-cygwin] Add _IOC_NEWLEN() and _IOC_NEWTYPE() macros.
@ 2018-08-24 13:10 Sebastian Huber
0 siblings, 0 replies; only message in thread
From: Sebastian Huber @ 2018-08-24 13:10 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4d144963ea0149c6a4bd8a9c2aec4ce740dad9d5
commit 4d144963ea0149c6a4bd8a9c2aec4ce740dad9d5
Author: brooks <brooks@FreeBSD.org>
Date: Fri Mar 16 22:23:04 2018 +0000
Add _IOC_NEWLEN() and _IOC_NEWTYPE() macros.
These macros take an existing ioctl(2) command and replace the length
with the specified length or length of the specified type respectively.
These can be used to define commands for 32-bit compatibility with fewer
opportunities for cut-and-paste errors then a whole new definition.
Reviewed by: cem, kib
Obtained from: CheriBSD
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D14706
Diff:
---
newlib/libc/sys/rtems/include/sys/ioccom.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/newlib/libc/sys/rtems/include/sys/ioccom.h b/newlib/libc/sys/rtems/include/sys/ioccom.h
index 34ea1e1..2a8416c 100644
--- a/newlib/libc/sys/rtems/include/sys/ioccom.h
+++ b/newlib/libc/sys/rtems/include/sys/ioccom.h
@@ -68,6 +68,10 @@ typedef unsigned long ioctl_command_t;
#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
/* this should be _IORW, but stdio got there first */
#define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
+/* Replace length/type in an ioctl command. */
+#define _IOC_NEWLEN(ioc, len) \
+ (((~(IOCPARM_MASK << 16)) & (ioc)) | (((len) & IOCPARM_MASK) << 16))
+#define _IOC_NEWTYPE(ioc, type) _IOC_NEWLEN((ioc), sizeof(type))
#ifdef _KERNEL
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2018-08-24 13:10 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-08-24 13:10 [newlib-cygwin] Add _IOC_NEWLEN() and _IOC_NEWTYPE() macros Sebastian Huber
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).