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author | Niall Sheridan <nsheridan@gmail.com> | 2017-10-18 13:15:14 +0100 |
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committer | Niall Sheridan <niall@intercom.io> | 2017-10-18 13:25:46 +0100 |
commit | 7b320119ba532fd409ec7dade7ad02011c309599 (patch) | |
tree | a39860f35b55e6cc499f8f5bfa969138c5dd6b73 /vendor/golang.org/x/sys/unix/dev_dragonfly.go | |
parent | 7c99874c7a3e7a89716f3ee0cdf696532e35ae35 (diff) |
Update dependencies
Diffstat (limited to 'vendor/golang.org/x/sys/unix/dev_dragonfly.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/dev_dragonfly.go | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/dev_dragonfly.go b/vendor/golang.org/x/sys/unix/dev_dragonfly.go new file mode 100644 index 0000000..8502f20 --- /dev/null +++ b/vendor/golang.org/x/sys/unix/dev_dragonfly.go @@ -0,0 +1,30 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Functions to access/create device major and minor numbers matching the +// encoding used in Dragonfly's sys/types.h header. +// +// The information below is extracted and adapted from sys/types.h: +// +// Minor gives a cookie instead of an index since in order to avoid changing the +// meanings of bits 0-15 or wasting time and space shifting bits 16-31 for +// devices that don't use them. + +package unix + +// Major returns the major component of a DragonFlyBSD device number. +func Major(dev uint64) uint32 { + return uint32((dev >> 8) & 0xff) +} + +// Minor returns the minor component of a DragonFlyBSD device number. +func Minor(dev uint64) uint32 { + return uint32(dev & 0xffff00ff) +} + +// Mkdev returns a DragonFlyBSD device number generated from the given major and +// minor components. +func Mkdev(major, minor uint32) uint64 { + return (uint64(major) << 8) | uint64(minor) +} |