diff options
Diffstat (limited to 'vendor/golang.org/x/sys/unix/dev_linux.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/dev_linux.go | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/vendor/golang.org/x/sys/unix/dev_linux.go b/vendor/golang.org/x/sys/unix/dev_linux.go deleted file mode 100644 index d165d6f30..000000000 --- a/vendor/golang.org/x/sys/unix/dev_linux.go +++ /dev/null @@ -1,42 +0,0 @@ -// 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 by the Linux kernel and glibc. -// -// The information below is extracted and adapted from bits/sysmacros.h in the -// glibc sources: -// -// dev_t in glibc is 64-bit, with 32-bit major and minor numbers. glibc's -// default encoding is MMMM Mmmm mmmM MMmm, where M is a hex digit of the major -// number and m is a hex digit of the minor number. This is backward compatible -// with legacy systems where dev_t is 16 bits wide, encoded as MMmm. It is also -// backward compatible with the Linux kernel, which for some architectures uses -// 32-bit dev_t, encoded as mmmM MMmm. - -package unix - -// Major returns the major component of a Linux device number. -func Major(dev uint64) uint32 { - major := uint32((dev & 0x00000000000fff00) >> 8) - major |= uint32((dev & 0xfffff00000000000) >> 32) - return major -} - -// Minor returns the minor component of a Linux device number. -func Minor(dev uint64) uint32 { - minor := uint32((dev & 0x00000000000000ff) >> 0) - minor |= uint32((dev & 0x00000ffffff00000) >> 12) - return minor -} - -// Mkdev returns a Linux device number generated from the given major and minor -// components. -func Mkdev(major, minor uint32) uint64 { - dev := (uint64(major) & 0x00000fff) << 8 - dev |= (uint64(major) & 0xfffff000) << 32 - dev |= (uint64(minor) & 0x000000ff) << 0 - dev |= (uint64(minor) & 0xffffff00) << 12 - return dev -} |