#include <signal.h>

typedef enum {
  /* hakurei requests shim exit */
  HAKUREI_SHIM_EXIT_REQUESTED,
  /* shim orphaned before hakurei delivers a signal */
  HAKUREI_SHIM_ORPHAN,
  /* unreachable */
  HAKUREI_SHIM_INVALID,
  /* unexpected si_pid */
  HAKUREI_SHIM_BAD_PID,
} hakurei_shim_msg;

void hakurei_shim_setup_cont_signal(pid_t ppid, int fd);