var NonblockingPipe = nonblockingPipe
var Fcntl = fcntl
var Closeonexec = closeonexec

func sigismember(mask *sigset, i int) bool {
	clear := *mask
	sigdelset(&clear, i)
	return clear != *mask
}

func Sigisblocked(i int) bool {
	var sigmask sigset
	sigprocmask(_SIG_SETMASK, nil, &sigmask)
	return sigismember(&sigmask, i)
}

type M = m

var waitForSigusr1 struct {
	rdpipe int32
	wrpipe int32

#include <pthread.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>

extern void IntoGoAndBack();

int CheckBlocked() {
	sigset_t mask;
	sigprocmask(SIG_BLOCK, NULL, &mask);
	return sigismember(&mask, SIGIO);
}

static void* sigthreadfunc(void* unused) {
	sigset_t mask;
	sigemptyset(&mask);
	sigaddset(&mask, SIGIO);
	sigprocmask(SIG_BLOCK, &mask, NULL);
	IntoGoAndBack();
	return NULL;
}

			oldgoact->handler = (uintptr_t)(oldact.sa_sigaction);
		} else {
			oldgoact->handler = (uintptr_t)(oldact.sa_handler);
		}
		oldgoact->mask = 0;
		for (i = 0; i < 8 * sizeof(oldgoact->mask); i++) {
			if (sigismember(&oldact.sa_mask, (int)(i+1)) == 1) {
				oldgoact->mask |= (uint64_t)(1)<<i;
			}
		}
		oldgoact->flags = (uint64_t)oldact.sa_flags;
	}

	_cgo_tsan_release();
	return ret;

		} else {
			oldgoact->handler = (uintptr_t)(oldact.sa_handler);
		}
		for (i = 0 ; i < _SIG_WORDS; i++) {
			oldgoact->mask.__bits[i] = 0;
		}
		for (i = 0; i < 8 * sizeof(oldgoact->mask); i++) {
			if (sigismember(&oldact.sa_mask, i+1) == 1) {
				oldgoact->mask.__bits[i/32] |= (uint32_t)(1)<<(i&31);
			}
		}
		oldgoact->flags = oldact.sa_flags;
	}

	_cgo_tsan_release();
	return ret;

static sigset_t mask;

static void init(void) __attribute__ ((constructor));

static void init() {
	sigemptyset(&mask);
	pthread_sigmask(SIG_SETMASK, NULL, &mask);
}

int SIGINTBlocked() {
	return sigismember(&mask, SIGINT);
}
*/
import "C"

import (
	"fmt"
	"io/fs"
	"os"
	"os/exec"
	"os/signal"
	"sync"
	"syscall"
)

func init() {
	register("CgoExecSignalMask", CgoExecSignalMask)
}