// ./systemd_process.go.gen
// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT

package sd_login

import (
	"net"
	"os"
	"strconv"

	"golang.org/x/sys/unix"
)

// A ProcessID represents a process.
type ProcessID int

func (pid ProcessID) isValid() bool {
	return pid >= 1
}

func GetPeer(conn *net.UnixConn) (ProcessID, error) {
	ucred, err := getpeercred(conn)
	if err != nil {
		return -1, err
	}
	return ProcessID(ucred.Pid), nil
}

func (pid ProcessID) getSysCgroupLeaf() _CgroupLeaf {
	cgroup, err := pid.getCgroup()
	if err != nil {
		return ""
	}
	cgTree, err := cgGetRootPath()
	if err != nil {
		return ""
	}
	return cgTree.Parse(cgroup)
}

func (pid ProcessID) GetSession() (v SessionName, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	vStr, ok := trimPrefixSuffix(pid.getSysCgroupLeaf().GetUnit(), "session-", ".scope")
	_v := SessionName(vStr)

	if !ok || _v.isValid() {
		v = _v
	} else {
		err = unix.ENXIO
	}
	return
}

func (pid ProcessID) GetOwner() (v UserID, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	uidStr, ok := trimPrefixSuffix(pid.getSysCgroupLeaf().GetSlice(), "user-", ".slice")
	if !ok {
		err = unix.ENXIO
		return
	}
	uidInt, err := strconv.Atoi(uidStr)
	if err != nil {
		err = unix.ENXIO
		return
	}
	_v := UserID(uidInt)

	if _v.isValid() {
		v = _v
	} else {
		err = unix.ENXIO
	}
	return
}

func (pid ProcessID) GetMachine() (v MachineName, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	unit := pid.getSysCgroupLeaf().GetUnit()
	if unit == "" {
		err = unix.ENXIO
		return
	}
	machine, err := os.Readlink("/run/systemd/machines/unit:" + unit)
	if err != nil {
		return
	}
	_v := MachineName(machine)

	if _v.isValid() {
		v = _v
	} else {
		err = unix.ENXIO
	}
	return
}

func (pid ProcessID) GetSlice() (v string, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	v = pid.getSysCgroupLeaf().GetSlice()
	if v == "" {
		err = unix.ENXIO
	}
	return
}

func (pid ProcessID) GetUnit() (v string, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	v = pid.getSysCgroupLeaf().GetUnit()
	if v == "" {
		err = unix.ENXIO
	}
	return
}

func (pid ProcessID) GetUserSlice() (v string, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	sysLeaf := pid.getSysCgroupLeaf()
	if !valid_user_tree(sysLeaf.GetUnit()) {
		err = unix.ENXIO
	}
	userLeaf := sysLeaf.GetRest()
	v = userLeaf.GetSlice()

	if v == "" {
		err = unix.ENXIO
	}
	return
}

func (pid ProcessID) GetUserUnit() (v string, err error) {
	if !pid.isValid() {
		err = unix.EINVAL
		return
	}

	sysLeaf := pid.getSysCgroupLeaf()
	if !valid_user_tree(sysLeaf.GetUnit()) {
		err = unix.ENXIO
	}
	userLeaf := sysLeaf.GetRest()
	v = userLeaf.GetUnit()

	if v == "" {
		err = unix.ENXIO
	}
	return
}