diff options
Diffstat (limited to 'pkg/abi/linux/dev.go')
| -rw-r--r-- | pkg/abi/linux/dev.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/pkg/abi/linux/dev.go b/pkg/abi/linux/dev.go index d3b63063f..ea5b16b7b 100644 --- a/pkg/abi/linux/dev.go +++ b/pkg/abi/linux/dev.go @@ -25,6 +25,13 @@ func MakeDeviceID(major uint16, minor uint32) uint32 { return (minor & 0xff) | ((uint32(major) & 0xfff) << 8) | ((minor >> 8) << 20) } +// DecodeDeviceID decodes a device ID into major and minor device numbers. +func DecodeDeviceID(rdev uint32) (uint16, uint32) { + major := uint16((rdev >> 8) & 0xfff) + minor := (rdev & 0xff) | ((rdev >> 20) << 8) + return major, minor +} + // Character device IDs. // // See Documentations/devices.txt and uapi/linux/major.h. |