SIGHUP, SIGINT, or SIGTERM signal causes the program to exit. A
SIGQUIT, SIGILL, SIGTRAP, SIGABRT, SIGSTKFLT, SIGEMT, or SIGSYS signal
causes the program to exit with a stack dump. A SIGTSTP, SIGTTIN, or
SIGTTOU signal gets the system default behavior (these signals are
used by the shell for job control). The SIGPROF signal is handled
directly by the Go runtime to implement runtime.CPUProfile. Other

	SIGPWR    = syscall.Signal(0x1e)
	SIGSTKFLT = syscall.Signal(0x10)
	SIGSTOP   = syscall.Signal(0x13)
	SIGSYS    = syscall.Signal(0x1f)
	SIGTSTP   = syscall.Signal(0x14)
	SIGTTIN   = syscall.Signal(0x15)
	SIGTTOU   = syscall.Signal(0x16)
	SIGURG    = syscall.Signal(0x17)
	SIGUSR1   = syscall.Signal(0xa)
	SIGUSR2   = syscall.Signal(0xc)
	SIGVTALRM = syscall.Signal(0x1a)
	SIGWINCH  = syscall.Signal(0x1c)

	SIGPWR    = syscall.Signal(0x1e)
	SIGSTKFLT = syscall.Signal(0x10)
	SIGSTOP   = syscall.Signal(0x13)
	SIGSYS    = syscall.Signal(0x1f)
	SIGTSTP   = syscall.Signal(0x14)
	SIGTTIN   = syscall.Signal(0x15)
	SIGTTOU   = syscall.Signal(0x16)
	SIGURG    = syscall.Signal(0x17)
	SIGUSR1   = syscall.Signal(0xa)
	SIGUSR2   = syscall.Signal(0xc)
	SIGVTALRM = syscall.Signal(0x1a)
	SIGWINCH  = syscall.Signal(0x1c)

	SIGPWR    = syscall.Signal(0x1e)
	SIGSTKFLT = syscall.Signal(0x10)
	SIGSTOP   = syscall.Signal(0x13)
	SIGSYS    = syscall.Signal(0x1f)
	SIGTSTP   = syscall.Signal(0x14)
	SIGTTIN   = syscall.Signal(0x15)
	SIGTTOU   = syscall.Signal(0x16)
	SIGURG    = syscall.Signal(0x17)
	SIGUSR1   = syscall.Signal(0xa)
	SIGUSR2   = syscall.Signal(0xc)
	SIGVTALRM = syscall.Signal(0x1a)
	SIGWINCH  = syscall.Signal(0x1c)

	SIGALRM   = Signal(14)
	SIGTERM   = Signal(15)
	SIGUSR1   = Signal(16)
	SIGUSR2   = Signal(17)
	SIGABND   = Signal(18)
	SIGCONT   = Signal(19)
	SIGCHLD   = Signal(20)
	SIGTTIN   = Signal(21)
	SIGTTOU   = Signal(22)
	SIGIO     = Signal(23)
	SIGQUIT   = Signal(24)
	SIGTSTP   = Signal(25)
	SIGTRAP   = Signal(26)
	SIGIOERR  = Signal(27)
	SIGWINCH  = Signal(28)
	SIGXCPU   = Signal(29)

		if err1 != 0 {
			goto childerror
		}
	}

	// Restore the signal mask. We do this after TIOCSPGRP to avoid
	// having the kernel send a SIGTTOU signal to the process group.
	runtime_AfterForkInChild()

	// Unshare
	if sys.Unshareflags != 0 {
		_, _, err1 = RawSyscall(SYS_UNSHARE, sys.Unshareflags, 0, 0)
		if err1 != 0 {
			goto childerror
		}

	SIGSTOP    = Signal(0x17)
	SIGSYS     = Signal(0xc)
	SIGTERM    = Signal(0xf)
	SIGTHAW    = Signal(0x23)
	SIGTRAP    = Signal(0x5)
	SIGTSTP    = Signal(0x18)
	SIGTTIN    = Signal(0x1a)
	SIGTTOU    = Signal(0x1b)
	SIGURG     = Signal(0x15)
	SIGUSR1    = Signal(0x10)
	SIGUSR2    = Signal(0x11)
	SIGVTALRM  = Signal(0x1c)
	SIGWAITING = Signal(0x20)
	SIGWINCH   = Signal(0x14)