// Copyright 2020 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. //go:build zos && s390x // Functions to access/create device major and minor numbers matching the // encoding used by z/OS. // // The information below is extracted and adapted from <sys/stat.h> macros. package unix // Major returns the major component of a z/OS device number. func Major(dev uint64) uint32 { return uint32((dev >> 16) & 0x0000FFFF) } // Minor returns the minor component of a z/OS device number. func Minor(dev uint64) uint32 { return uint32(dev & 0x0000FFFF) } // Mkdev returns a z/OS device number generated from the given major and minor // components. func Mkdev(major, minor uint32) uint64 { return (uint64(major) << 16) | uint64(minor) }