mirror of
https://github.com/opencontainers/runc.git
synced 2026-07-11 14:13:58 +08:00
Sebastiaan van Stijn
4316df8b53
Moving these utilities to a separate package, so that consumers of this package don't have to pull in the whole "system" package. Looking at uses of these utilities (outside of runc itself); `RunningInUserNS()` is used by [various external consumers][1], so adding a "Deprecated" alias for this. [1]: https://grep.app/search?current=2&q=.RunningInUserNS Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
102 lines
2.0 KiB
Go
102 lines
2.0 KiB
Go
// +build linux
|
|
|
|
package system
|
|
|
|
import (
|
|
"os/exec"
|
|
"unsafe"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
type ParentDeathSignal int
|
|
|
|
func (p ParentDeathSignal) Restore() error {
|
|
if p == 0 {
|
|
return nil
|
|
}
|
|
current, err := GetParentDeathSignal()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if p == current {
|
|
return nil
|
|
}
|
|
return p.Set()
|
|
}
|
|
|
|
func (p ParentDeathSignal) Set() error {
|
|
return SetParentDeathSignal(uintptr(p))
|
|
}
|
|
|
|
func Execv(cmd string, args []string, env []string) error {
|
|
name, err := exec.LookPath(cmd)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return unix.Exec(name, args, env)
|
|
}
|
|
|
|
func Prlimit(pid, resource int, limit unix.Rlimit) error {
|
|
_, _, err := unix.RawSyscall6(unix.SYS_PRLIMIT64, uintptr(pid), uintptr(resource), uintptr(unsafe.Pointer(&limit)), uintptr(unsafe.Pointer(&limit)), 0, 0)
|
|
if err != 0 {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func SetParentDeathSignal(sig uintptr) error {
|
|
if err := unix.Prctl(unix.PR_SET_PDEATHSIG, sig, 0, 0, 0); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func GetParentDeathSignal() (ParentDeathSignal, error) {
|
|
var sig int
|
|
if err := unix.Prctl(unix.PR_GET_PDEATHSIG, uintptr(unsafe.Pointer(&sig)), 0, 0, 0); err != nil {
|
|
return -1, err
|
|
}
|
|
return ParentDeathSignal(sig), nil
|
|
}
|
|
|
|
func SetKeepCaps() error {
|
|
if err := unix.Prctl(unix.PR_SET_KEEPCAPS, 1, 0, 0, 0); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func ClearKeepCaps() error {
|
|
if err := unix.Prctl(unix.PR_SET_KEEPCAPS, 0, 0, 0, 0); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func Setctty() error {
|
|
if err := unix.IoctlSetInt(0, unix.TIOCSCTTY, 0); err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// SetSubreaper sets the value i as the subreaper setting for the calling process
|
|
func SetSubreaper(i int) error {
|
|
return unix.Prctl(unix.PR_SET_CHILD_SUBREAPER, uintptr(i), 0, 0, 0)
|
|
}
|
|
|
|
// GetSubreaper returns the subreaper setting for the calling process
|
|
func GetSubreaper() (int, error) {
|
|
var i uintptr
|
|
|
|
if err := unix.Prctl(unix.PR_GET_CHILD_SUBREAPER, uintptr(unsafe.Pointer(&i)), 0, 0, 0); err != nil {
|
|
return -1, err
|
|
}
|
|
|
|
return int(i), nil
|
|
}
|