zig signalfd

signalfd.zig

pub fn signals(io: *IO) !void {
    const os = std.os;
    var mask = os.linux.empty_sigset;
    os.linux.sigaddset(&mask, os.SIG.INT);
    os.linux.sigaddset(&mask, os.SIG.TSTP);
    const r = os.linux.sigprocmask(os.SIG.BLOCK, &mask, null);
    const sigfd = try os.signalfd(-1, &mask, 0);
    std.debug.print("R{}\n", .{r});

    while (true) {
        const events = try io.poll_add(sigfd, os.POLL.IN);
        std.debug.assert(events == 1);

        var si: os.linux.signalfd_siginfo = undefined;
        const bytes_read = try io.read(sigfd, std.mem.asBytes(&si), 0);
        std.debug.assert(bytes_read == @sizeOf(@TypeOf(si)));
        std.debug.print("si: {}\n", .{si});

        std.debug.print("PID: {}\n", .{os.linux.getpid()});
        os.exit(1);
    }
}