diff options
Diffstat (limited to 'sysdeps/mach/hurd/ioctls.h')
| -rw-r--r-- | sysdeps/mach/hurd/ioctls.h | 31 |
1 files changed, 18 insertions, 13 deletions
diff --git a/sysdeps/mach/hurd/ioctls.h b/sysdeps/mach/hurd/ioctls.h index af44873cb7..8036fd700d 100644 --- a/sysdeps/mach/hurd/ioctls.h +++ b/sysdeps/mach/hurd/ioctls.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1992, 1993 Free Software Foundation, Inc. +/* Copyright (C) 1992, 1993, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -21,16 +21,20 @@ Cambridge, MA 02139, USA. */ #define _IOCTLS_H 1 /* Hurd ioctl request are made up of several fields: - bits 31-30: inout direction (enum __ioctl_dir) - bits 29-12: type encoding as follows; zero count indicates omitted datum - 29-28: datum #0 type (enum __ioctl_datum) - 27-26: datum #1 type (enum __ioctl_datum) - 25-24: datum #2 type (enum __ioctl_datum) - 23-19: datum #0 count [0..31] - 18-14: datum #1 count [0..31] - 13-12: datum #2 count [0..3] - bits 11- 8: group (letter - 'f': ['f'..'v']) - bits 7- 0: command [0..127] + + 10987654321098765432109876543210 + IOt0t1t2cc0c0cc1c1cc2ggggccccccc + + bits [31,30]: inout direction (enum __ioctl_dir) + bits [29,11]: type encoding as follows; zero count indicates omitted datum + [29,28]: datum #0 type (enum __ioctl_datum) + [27,26]: datum #1 type (enum __ioctl_datum) + [24,25]: datum #2 type (enum __ioctl_datum) + [23,19]: datum #0 count [0,31] + [18,14]: datum #1 count [0,31] + [13,11]: datum #2 count [0,3] + bits [07,10]: group (letter - 'f': ['f','v']) + bits [00,06]: command [0,127] The following macros construct and dissect these fields. */ @@ -50,9 +54,10 @@ enum __ioctl_datum { IOC_8, IOC_16, IOC_32 }; /* Dissect an ioctl into its component fields. */ #define _IOC_INOUT(request) (((unsigned int) (request) >> 30) & IOC_INOUT) -#define _IOC_GROUP(request) ('f' + (((unsigned int) (request) >> 7) & 15)) +#define _IOC_GROUP(request) ('f' + (((unsigned int) (request) >> 7) & 0xf)) #define _IOC_COMMAND(request) ((unsigned int) (request) & 0x7f) #define _IOC_TYPE(request) (((unsigned int) (request) >> 11) & 0x7ffff) +#define _IOC_NOTYPE(request) ((unsigned int) (request) & 0x3ff) /* Construct a type information field from the broken-out type and count fields. */ @@ -65,7 +70,7 @@ enum __ioctl_datum { IOC_8, IOC_16, IOC_32 }; #define _IOT_TYPE2(type) (((unsigned int) (type) >> 13) & 3) #define _IOT_COUNT0(type) (((unsigned int) (type) >> 8) & 0x1f) #define _IOT_COUNT1(type) (((unsigned int) (type) >> 3) & 0x1f) -#define _IOT_COUNT2(type) (((unsigned int) (type) >> 0) & 3) +#define _IOT_COUNT2(type) (((unsigned int) (type) >> 0) & 7) /* Construct an ioctl from all the broken-out fields. */ #define _IOCT(inout, group, num, t0, c0, t1, c1, t2, c2) \ |