system/utest/spawn/launcher.c

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include <launchpad/launchpad.h>
#include <zircon/syscalls.h>
#include <string.h>

int main(int argc, const char* const* argv) {
    launchpad_t* lp = NULL;
    launchpad_create(ZX_HANDLE_INVALID, "launcher-child", &lp);
    launchpad_load_from_file(lp, argv[1]);
    launchpad_set_args(lp, argc - 1, argv + 1);
    launchpad_clone(lp, LP_CLONE_ALL);

    zx_handle_t process = ZX_HANDLE_INVALID;
    zx_status_t status = launchpad_go(lp, &process, NULL);
    if (status != ZX_OK)
        return 401;

    status = zx_object_wait_one(process, ZX_TASK_TERMINATED, ZX_TIME_INFINITE, NULL);
    if (status != ZX_OK)
        return status;

    zx_info_process_t proc_info;
    memset(&proc_info, 0, sizeof(proc_info));
    status = zx_object_get_info(process, ZX_INFO_PROCESS, &proc_info, sizeof(proc_info), NULL, NULL);
    if (status != ZX_OK)
        return status;

    return proc_info.return_code;
}