shm

README

shm

shm implements System V shared memory functions (shmctl, shmget, shmat, shmdt) in pure Go (except solaris, see #24357).

Installation

go get -u github.com/gen2brain/shm

More

For System V Message Queue IPC (i.e. msgctl, msgget, msgrcv, msgsnd) see ipc.

Documentation

Index

• type IdDs
• type Perm

Types

type IdDs

type IdDs struct {
	// Operation permission struct.
	Perm Perm
	// Last attach time.
	Atime int64
	// Last detach time.
	Dtime int64
	// Last change time.
	Ctime int64
	// Size of segment in bytes.
	SegSz uint64
	// Pid of creator.
	Cpid int32
	// Pid of last shmat/shmdt.
	Lpid int32
	// Number of current attaches.
	Nattch uint64
	// Reserved.
	GlibcReserved5 uint64
	// Reserved.
	GlibcReserved6 uint64
}

IdDs describes shared memory segment.

type Perm

type Perm struct {
	// Key.
	Key int32
	// Owner's user ID.
	Uid uint32
	// Owner's group ID.
	Gid uint32
	// Creator's user ID.
	Cuid uint32
	// Creator's group ID.
	Cgid uint32
	// Read/write permission.
	Mode uint32
	// Sequence number.
	Seq uint32
	// Padding.
	Pad1 uint32
	// Reserved.
	GlibcReserved1 uint64
	// Reserved.
	GlibcReserved2 uint64
}

Perm is used to pass permission information to IPC operations.