43 lines
1.5 KiB
Go
43 lines
1.5 KiB
Go
// +build linux
|
|
|
|
// http://man7.org/linux/man-pages/man2/prctl.2.html
|
|
package osutils
|
|
|
|
import (
|
|
"syscall"
|
|
"unsafe"
|
|
)
|
|
|
|
// If arg2 is nonzero, set the "child subreaper" attribute of the
|
|
// calling process; if arg2 is zero, unset the attribute. When a
|
|
// process is marked as a child subreaper, all of the children
|
|
// that it creates, and their descendants, will be marked as
|
|
// having a subreaper. In effect, a subreaper fulfills the role
|
|
// of init(1) for its descendant processes. Upon termination of
|
|
// a process that is orphaned (i.e., its immediate parent has
|
|
// already terminated) and marked as having a subreaper, the
|
|
// nearest still living ancestor subreaper will receive a SIGCHLD
|
|
// signal and be able to wait(2) on the process to discover its
|
|
// termination status.
|
|
const PR_SET_CHILD_SUBREAPER = 36
|
|
|
|
// Return the "child subreaper" setting of the caller, in the
|
|
// location pointed to by (int *) arg2.
|
|
const PR_GET_CHILD_SUBREAPER = 37
|
|
|
|
// GetSubreaper returns the subreaper setting for the calling process
|
|
func GetSubreaper() (int, error) {
|
|
var i uintptr
|
|
if _, _, err := syscall.RawSyscall(syscall.SYS_PRCTL, PR_GET_CHILD_SUBREAPER, uintptr(unsafe.Pointer(&i)), 0); err != 0 {
|
|
return -1, err
|
|
}
|
|
return int(i), nil
|
|
}
|
|
|
|
// SetSubreaper sets the value i as the subreaper setting for the calling process
|
|
func SetSubreaper(i int) error {
|
|
if _, _, err := syscall.RawSyscall(syscall.SYS_PRCTL, PR_SET_CHILD_SUBREAPER, uintptr(i), 0); err != 0 {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|