--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/third_party/libuv/test/test-spawn.c	Wed Jan 14 19:39:52 2026 -0800
@@ -0,0 +1,2112 @@
+
+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#include "uv.h"
+#include "task.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _WIN32
+# include <shellapi.h>
+# include <wchar.h>
+  typedef BOOL (WINAPI *sCompareObjectHandles)(_In_ HANDLE, _In_ HANDLE);
+# define unlink _unlink
+# define putenv _putenv
+# define close _close
+#else
+# include <unistd.h>
+# include <sys/wait.h>
+#endif
+
+
+static int close_cb_called;
+static int exit_cb_called;
+static uv_process_t process;
+static uv_timer_t timer;
+static uv_process_options_t options;
+static char exepath[1024];
+static size_t exepath_size = 1024;
+static char* args[5];
+static int no_term_signal;
+static int timer_counter;
+static uv_tcp_t tcp_server;
+
+#define OUTPUT_SIZE 1024
+static char output[OUTPUT_SIZE];
+static int output_used;
+
+
+static void close_cb(uv_handle_t* handle) {
+  printf("close_cb\n");
+  close_cb_called++;
+}
+
+static void exit_cb(uv_process_t* process,
+                    int64_t exit_status,
+                    int term_signal) {
+  printf("exit_cb\n");
+  exit_cb_called++;
+  ASSERT_EQ(1, exit_status);
+  ASSERT_OK(term_signal);
+  uv_close((uv_handle_t*) process, close_cb);
+}
+
+
+static void fail_cb(uv_process_t* process,
+                    int64_t exit_status,
+                    int term_signal) {
+  ASSERT(0 && "fail_cb called");
+}
+
+
+static void kill_cb(uv_process_t* process,
+                    int64_t exit_status,
+                    int term_signal) {
+  int err;
+
+  printf("exit_cb\n");
+  exit_cb_called++;
+#ifdef _WIN32
+  ASSERT_EQ(1, exit_status);
+#else
+  ASSERT_OK(exit_status);
+#endif
+#if defined(__APPLE__) || defined(__MVS__)
+  /*
+   * At least starting with Darwin Kernel Version 16.4.0, sending a SIGTERM to a
+   * process that is still starting up kills it with SIGKILL instead of SIGTERM.
+   * See: https://github.com/libuv/libuv/issues/1226
+   */
+  ASSERT(no_term_signal || term_signal == SIGTERM || term_signal == SIGKILL);
+#else
+  ASSERT(no_term_signal || term_signal == SIGTERM);
+#endif
+  uv_close((uv_handle_t*) process, close_cb);
+
+  /*
+   * Sending signum == 0 should check if the
+   * child process is still alive, not kill it.
+   * This process should be dead.
+   */
+  err = uv_kill(process->pid, 0);
+  ASSERT_EQ(err, UV_ESRCH);
+}
+
+static void detach_failure_cb(uv_process_t* process,
+                              int64_t exit_status,
+                              int term_signal) {
+  printf("detach_cb\n");
+  exit_cb_called++;
+}
+
+static void on_alloc(uv_handle_t* handle,
+                     size_t suggested_size,
+                     uv_buf_t* buf) {
+  buf->base = output + output_used;
+  buf->len = OUTPUT_SIZE - output_used;
+}
+
+
+static void on_read(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {
+  if (nread > 0) {
+    output_used += nread;
+  } else if (nread < 0) {
+    ASSERT_EQ(nread, UV_EOF);
+    uv_close((uv_handle_t*) tcp, close_cb);
+  }
+}
+
+
+static void on_read_once(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {
+  uv_read_stop(tcp);
+  on_read(tcp, nread, buf);
+}
+
+
+static void write_cb(uv_write_t* req, int status) {
+  ASSERT_OK(status);
+  uv_close((uv_handle_t*) req->handle, close_cb);
+}
+
+
+static void write_null_cb(uv_write_t* req, int status) {
+  ASSERT_OK(status);
+}
+
+
+static void init_process_options(char* test, uv_exit_cb exit_cb) {
+  /* Note spawn_helper1 defined in test/run-tests.c */
+  int r = uv_exepath(exepath, &exepath_size);
+  ASSERT_OK(r);
+  exepath[exepath_size] = '\0';
+  args[0] = exepath;
+  args[1] = test;
+  args[2] = NULL;
+  args[3] = NULL;
+  args[4] = NULL;
+  options.file = exepath;
+  options.args = args;
+  options.exit_cb = exit_cb;
+  options.flags = 0;
+}
+
+
+static void timer_cb(uv_timer_t* handle) {
+  uv_process_kill(&process, SIGTERM);
+  uv_close((uv_handle_t*) handle, close_cb);
+}
+
+
+static void timer_counter_cb(uv_timer_t* handle) {
+  ++timer_counter;
+}
+
+
+TEST_IMPL(spawn_fails) {
+  int r;
+
+  init_process_options("", fail_cb);
+  options.file = options.args[0] = "program-that-had-better-not-exist";
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT(r == UV_ENOENT || r == UV_EACCES);
+  ASSERT_OK(uv_is_active((uv_handle_t*) &process));
+  uv_close((uv_handle_t*) &process, NULL);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+#ifndef _WIN32
+TEST_IMPL(spawn_fails_check_for_waitpid_cleanup) {
+  int r;
+  int status;
+  int err;
+
+  init_process_options("", fail_cb);
+  options.file = options.args[0] = "program-that-had-better-not-exist";
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT(r == UV_ENOENT || r == UV_EACCES);
+  ASSERT_OK(uv_is_active((uv_handle_t*) &process));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  /* verify the child is successfully cleaned up within libuv */
+  do
+    err = waitpid(process.pid, &status, 0);
+  while (err == -1 && errno == EINTR);
+
+  ASSERT_EQ(err, -1);
+  ASSERT_EQ(errno, ECHILD);
+
+  uv_close((uv_handle_t*) &process, NULL);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+#endif
+
+
+TEST_IMPL(spawn_empty_env) {
+  char* env[1];
+
+  /* The autotools dynamic library build requires the presence of
+   * DYLD_LIBARY_PATH (macOS) or LD_LIBRARY_PATH/LIBPATH (other Unices)
+   * in the environment, but of course that doesn't work with
+   * the empty environment that we're testing here.
+   */
+  if (NULL != getenv("DYLD_LIBRARY_PATH") ||
+      NULL != getenv("LD_LIBRARY_PATH") ||
+      NULL != getenv("LIBPATH")) {
+    RETURN_SKIP("doesn't work with DYLD_LIBRARY_PATH/LD_LIBRARY_PATH/LIBPATH");
+  }
+
+  init_process_options("spawn_helper1", exit_cb);
+  options.env = env;
+  env[0] = NULL;
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_exit_code) {
+  int r;
+
+  init_process_options("spawn_helper1", exit_cb);
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_stdout) {
+  int r;
+  uv_pipe_t out;
+  uv_stdio_container_t stdio[2];
+
+  init_process_options("spawn_helper2", exit_cb);
+
+  uv_pipe_init(uv_default_loop(), &out, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio_count = 2;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called); /* Once for process once for the pipe. */
+  printf("output is: %s", output);
+  ASSERT_OK(strcmp("hello world\n", output));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_stdout_to_file) {
+  int r;
+  uv_file file;
+  uv_fs_t fs_req;
+  uv_stdio_container_t stdio[2];
+  uv_buf_t buf;
+
+  /* Setup. */
+  unlink("stdout_file");
+
+  init_process_options("spawn_helper2", exit_cb);
+
+  r = uv_fs_open(NULL, &fs_req, "stdout_file", UV_FS_O_CREAT | UV_FS_O_RDWR,
+      S_IRUSR | S_IWUSR, NULL);
+  ASSERT_NE(r, -1);
+  uv_fs_req_cleanup(&fs_req);
+
+  file = r;
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_INHERIT_FD;
+  options.stdio[1].data.fd = file;
+  options.stdio_count = 2;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  buf = uv_buf_init(output, sizeof(output));
+  r = uv_fs_read(NULL, &fs_req, file, &buf, 1, 0, NULL);
+  ASSERT_EQ(12, r);
+  uv_fs_req_cleanup(&fs_req);
+
+  r = uv_fs_close(NULL, &fs_req, file, NULL);
+  ASSERT_OK(r);
+  uv_fs_req_cleanup(&fs_req);
+
+  printf("output is: %s", output);
+  ASSERT_OK(strcmp("hello world\n", output));
+
+  /* Cleanup. */
+  unlink("stdout_file");
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_stdout_and_stderr_to_file) {
+  int r;
+  uv_file file;
+  uv_fs_t fs_req;
+  uv_stdio_container_t stdio[3];
+  uv_buf_t buf;
+
+  /* Setup. */
+  unlink("stdout_file");
+
+  init_process_options("spawn_helper6", exit_cb);
+
+  r = uv_fs_open(NULL, &fs_req, "stdout_file", UV_FS_O_CREAT | UV_FS_O_RDWR,
+      S_IRUSR | S_IWUSR, NULL);
+  ASSERT_NE(r, -1);
+  uv_fs_req_cleanup(&fs_req);
+
+  file = r;
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_INHERIT_FD;
+  options.stdio[1].data.fd = file;
+  options.stdio[2].flags = UV_INHERIT_FD;
+  options.stdio[2].data.fd = file;
+  options.stdio_count = 3;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  buf = uv_buf_init(output, sizeof(output));
+  r = uv_fs_read(NULL, &fs_req, file, &buf, 1, 0, NULL);
+  ASSERT_EQ(27, r);
+  uv_fs_req_cleanup(&fs_req);
+
+  r = uv_fs_close(NULL, &fs_req, file, NULL);
+  ASSERT_OK(r);
+  uv_fs_req_cleanup(&fs_req);
+
+  printf("output is: %s", output);
+  ASSERT_OK(strcmp("hello world\nhello errworld\n", output));
+
+  /* Cleanup. */
+  unlink("stdout_file");
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_stdout_and_stderr_to_file2) {
+#ifndef _WIN32
+  int r;
+  uv_file file;
+  uv_fs_t fs_req;
+  uv_stdio_container_t stdio[3];
+  uv_buf_t buf;
+
+  /* Setup. */
+  unlink("stdout_file");
+
+  init_process_options("spawn_helper6", exit_cb);
+
+  /* Replace stderr with our file */
+  r = uv_fs_open(NULL,
+                 &fs_req,
+                 "stdout_file",
+                 O_CREAT | O_RDWR,
+                 S_IRUSR | S_IWUSR,
+                 NULL);
+  ASSERT_NE(r, -1);
+  uv_fs_req_cleanup(&fs_req);
+  file = dup2(r, STDERR_FILENO);
+  ASSERT_NE(file, -1);
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_INHERIT_FD;
+  options.stdio[1].data.fd = file;
+  options.stdio[2].flags = UV_INHERIT_FD;
+  options.stdio[2].data.fd = file;
+  options.stdio_count = 3;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  buf = uv_buf_init(output, sizeof(output));
+  r = uv_fs_read(NULL, &fs_req, file, &buf, 1, 0, NULL);
+  ASSERT_EQ(27, r);
+  uv_fs_req_cleanup(&fs_req);
+
+  r = uv_fs_close(NULL, &fs_req, file, NULL);
+  ASSERT_OK(r);
+  uv_fs_req_cleanup(&fs_req);
+
+  printf("output is: %s", output);
+  ASSERT_OK(strcmp("hello world\nhello errworld\n", output));
+
+  /* Cleanup. */
+  unlink("stdout_file");
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+#else
+  RETURN_SKIP("Unix only test");
+#endif
+}
+
+
+TEST_IMPL(spawn_stdout_and_stderr_to_file_swap) {
+#ifndef _WIN32
+  int r;
+  uv_file stdout_file;
+  uv_file stderr_file;
+  uv_fs_t fs_req;
+  uv_stdio_container_t stdio[3];
+  uv_buf_t buf;
+
+  /* Setup. */
+  unlink("stdout_file");
+  unlink("stderr_file");
+
+  init_process_options("spawn_helper6", exit_cb);
+
+  /* open 'stdout_file' and replace STDOUT_FILENO with it */
+  r = uv_fs_open(NULL,
+                 &fs_req,
+                 "stdout_file",
+                 O_CREAT | O_RDWR,
+                 S_IRUSR | S_IWUSR,
+                 NULL);
+  ASSERT_NE(r, -1);
+  uv_fs_req_cleanup(&fs_req);
+  stdout_file = dup2(r, STDOUT_FILENO);
+  ASSERT_NE(stdout_file, -1);
+
+  /* open 'stderr_file' and replace STDERR_FILENO with it */
+  r = uv_fs_open(NULL, &fs_req, "stderr_file", O_CREAT | O_RDWR,
+      S_IRUSR | S_IWUSR, NULL);
+  ASSERT_NE(r, -1);
+  uv_fs_req_cleanup(&fs_req);
+  stderr_file = dup2(r, STDERR_FILENO);
+  ASSERT_NE(stderr_file, -1);
+
+  /* now we're going to swap them: the child process' stdout will be our
+   * stderr_file and vice versa */
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_INHERIT_FD;
+  options.stdio[1].data.fd = stderr_file;
+  options.stdio[2].flags = UV_INHERIT_FD;
+  options.stdio[2].data.fd = stdout_file;
+  options.stdio_count = 3;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  buf = uv_buf_init(output, sizeof(output));
+
+  /* check the content of stdout_file */
+  r = uv_fs_read(NULL, &fs_req, stdout_file, &buf, 1, 0, NULL);
+  ASSERT_GE(r, 15);
+  uv_fs_req_cleanup(&fs_req);
+
+  r = uv_fs_close(NULL, &fs_req, stdout_file, NULL);
+  ASSERT_OK(r);
+  uv_fs_req_cleanup(&fs_req);
+
+  printf("output is: %s", output);
+  ASSERT_OK(strncmp("hello errworld\n", output, 15));
+
+  /* check the content of stderr_file */
+  r = uv_fs_read(NULL, &fs_req, stderr_file, &buf, 1, 0, NULL);
+  ASSERT_GE(r, 12);
+  uv_fs_req_cleanup(&fs_req);
+
+  r = uv_fs_close(NULL, &fs_req, stderr_file, NULL);
+  ASSERT_OK(r);
+  uv_fs_req_cleanup(&fs_req);
+
+  printf("output is: %s", output);
+  ASSERT_OK(strncmp("hello world\n", output, 12));
+
+  /* Cleanup. */
+  unlink("stdout_file");
+  unlink("stderr_file");
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+#else
+  RETURN_SKIP("Unix only test");
+#endif
+}
+
+
+TEST_IMPL(spawn_stdin) {
+  int r;
+  uv_pipe_t out;
+  uv_pipe_t in;
+  uv_write_t write_req;
+  uv_buf_t buf;
+  uv_stdio_container_t stdio[2];
+  char buffer[] = "hello-from-spawn_stdin";
+
+  init_process_options("spawn_helper3", exit_cb);
+
+  uv_pipe_init(uv_default_loop(), &out, 0);
+  uv_pipe_init(uv_default_loop(), &in, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE;
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio_count = 2;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  buf.base = buffer;
+  buf.len = sizeof(buffer);
+  r = uv_write(&write_req, (uv_stream_t*) &in, &buf, 1, write_cb);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(3, close_cb_called); /* Once for process twice for the pipe. */
+  ASSERT_OK(strcmp(buffer, output));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_stdio_greater_than_3) {
+  int r;
+  uv_pipe_t pipe;
+  uv_stdio_container_t stdio[4];
+
+  init_process_options("spawn_helper5", exit_cb);
+
+  uv_pipe_init(uv_default_loop(), &pipe, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_IGNORE;
+  options.stdio[2].flags = UV_IGNORE;
+  options.stdio[3].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[3].data.stream = (uv_stream_t*) &pipe;
+  options.stdio_count = 4;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &pipe, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called); /* Once for process once for the pipe. */
+  printf("output from stdio[3] is: %s", output);
+  ASSERT_OK(strcmp("fourth stdio!\n", output));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+int spawn_tcp_server_helper(void) {
+  uv_tcp_t tcp;
+  uv_os_sock_t handle;
+  int r;
+
+  r = uv_tcp_init(uv_default_loop(), &tcp);
+  ASSERT_OK(r);
+
+#ifdef _WIN32
+  handle = _get_osfhandle(3);
+#else
+  handle = 3;
+#endif
+  r = uv_tcp_open(&tcp, handle);
+  ASSERT_OK(r);
+
+  /* Make sure that we can listen on a socket that was
+   * passed down from the parent process
+   */
+  r = uv_listen((uv_stream_t*) &tcp, SOMAXCONN, NULL);
+  ASSERT_OK(r);
+
+  return 1;
+}
+
+
+TEST_IMPL(spawn_tcp_server) {
+  uv_stdio_container_t stdio[4];
+  struct sockaddr_in addr;
+  int fd;
+  int r;
+#ifdef _WIN32
+  uv_os_fd_t handle;
+#endif
+
+  init_process_options("spawn_tcp_server_helper", exit_cb);
+
+  ASSERT_OK(uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));
+
+  fd = -1;
+  r = uv_tcp_init_ex(uv_default_loop(), &tcp_server, AF_INET);
+  ASSERT_OK(r);
+  r = uv_tcp_bind(&tcp_server, (const struct sockaddr*) &addr, 0);
+  ASSERT_OK(r);
+#ifdef _WIN32
+  r = uv_fileno((uv_handle_t*) &tcp_server, &handle);
+  fd = _open_osfhandle((intptr_t) handle, 0);
+#else
+  r = uv_fileno((uv_handle_t*) &tcp_server, &fd);
+ #endif
+  ASSERT_OK(r);
+  ASSERT_GT(fd, 0);
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_INHERIT_FD;
+  options.stdio[0].data.fd = 0;
+  options.stdio[1].flags = UV_INHERIT_FD;
+  options.stdio[1].data.fd = 1;
+  options.stdio[2].flags = UV_INHERIT_FD;
+  options.stdio[2].data.fd = 2;
+  options.stdio[3].flags = UV_INHERIT_FD;
+  options.stdio[3].data.fd = fd;
+  options.stdio_count = 4;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_ignored_stdio) {
+  int r;
+
+  init_process_options("spawn_helper6", exit_cb);
+
+  options.stdio = NULL;
+  options.stdio_count = 0;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_and_kill) {
+  int r;
+
+  init_process_options("spawn_helper4", kill_cb);
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_timer_init(uv_default_loop(), &timer);
+  ASSERT_OK(r);
+
+  r = uv_timer_start(&timer, timer_cb, 500, 0);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called); /* Once for process and once for timer. */
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_preserve_env) {
+  int r;
+  uv_pipe_t out;
+  uv_stdio_container_t stdio[2];
+
+  init_process_options("spawn_helper7", exit_cb);
+
+  uv_pipe_init(uv_default_loop(), &out, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio_count = 2;
+
+  r = putenv("ENV_TEST=testval");
+  ASSERT_OK(r);
+
+  /* Explicitly set options.env to NULL to test for env clobbering. */
+  options.env = NULL;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called);
+
+  printf("output is: %s", output);
+  ASSERT_OK(strcmp("testval", output));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_detached) {
+  int r;
+
+  init_process_options("spawn_helper4", detach_failure_cb);
+
+  options.flags |= UV_PROCESS_DETACHED;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  uv_unref((uv_handle_t*) &process);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_OK(exit_cb_called);
+
+  ASSERT_EQ(process.pid, uv_process_get_pid(&process));
+
+  r = uv_kill(process.pid, 0);
+  ASSERT_OK(r);
+
+  r = uv_kill(process.pid, SIGTERM);
+  ASSERT_OK(r);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+TEST_IMPL(spawn_and_kill_with_std) {
+  int r;
+  uv_pipe_t in, out, err;
+  uv_write_t write;
+  char message[] = "Nancy's joining me because the message this evening is "
+                   "not my message but ours.";
+  uv_buf_t buf;
+  uv_stdio_container_t stdio[3];
+
+  init_process_options("spawn_helper4", kill_cb);
+
+  r = uv_pipe_init(uv_default_loop(), &in, 0);
+  ASSERT_OK(r);
+
+  r = uv_pipe_init(uv_default_loop(), &out, 0);
+  ASSERT_OK(r);
+
+  r = uv_pipe_init(uv_default_loop(), &err, 0);
+  ASSERT_OK(r);
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE;
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio[2].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[2].data.stream = (uv_stream_t*) &err;
+  options.stdio_count = 3;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  buf = uv_buf_init(message, sizeof message);
+  r = uv_write(&write, (uv_stream_t*) &in, &buf, 1, write_cb);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &err, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_timer_init(uv_default_loop(), &timer);
+  ASSERT_OK(r);
+
+  r = uv_timer_start(&timer, timer_cb, 500, 0);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(5, close_cb_called); /* process x 1, timer x 1, stdio x 3. */
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_and_ping) {
+  uv_write_t write_req;
+  uv_pipe_t in, out;
+  uv_buf_t buf;
+  uv_stdio_container_t stdio[2];
+  int r;
+
+  init_process_options("spawn_helper3", exit_cb);
+  buf = uv_buf_init("TEST", 4);
+
+  uv_pipe_init(uv_default_loop(), &out, 0);
+  uv_pipe_init(uv_default_loop(), &in, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE;
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio_count = 2;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  /* Sending signum == 0 should check if the
+   * child process is still alive, not kill it.
+   */
+  r = uv_process_kill(&process, 0);
+  ASSERT_OK(r);
+
+  r = uv_write(&write_req, (uv_stream_t*) &in, &buf, 1, write_cb);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  ASSERT_OK(exit_cb_called);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_OK(strcmp(output, "TEST"));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_same_stdout_stderr) {
+  uv_write_t write_req;
+  uv_pipe_t in, out;
+  uv_buf_t buf;
+  uv_stdio_container_t stdio[3];
+  int r;
+
+  init_process_options("spawn_helper3", exit_cb);
+  buf = uv_buf_init("TEST", 4);
+
+  uv_pipe_init(uv_default_loop(), &out, 0);
+  uv_pipe_init(uv_default_loop(), &in, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE;
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio_count = 2;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  /* Sending signum == 0 should check if the
+   * child process is still alive, not kill it.
+   */
+  r = uv_process_kill(&process, 0);
+  ASSERT_OK(r);
+
+  r = uv_write(&write_req, (uv_stream_t*) &in, &buf, 1, write_cb);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  ASSERT_OK(exit_cb_called);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_OK(strcmp(output, "TEST"));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_closed_process_io) {
+  uv_pipe_t in;
+  uv_write_t write_req;
+  uv_buf_t buf;
+  uv_stdio_container_t stdio[2];
+  static char buffer[] = "hello-from-spawn_stdin\n";
+
+  init_process_options("spawn_helper3", exit_cb);
+
+  uv_pipe_init(uv_default_loop(), &in, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE;
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio_count = 1;
+
+  close(0); /* Close process stdin. */
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+
+  buf = uv_buf_init(buffer, sizeof(buffer));
+  ASSERT_OK(uv_write(&write_req, (uv_stream_t*) &in, &buf, 1, write_cb));
+
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called); /* process, child stdin */
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(kill) {
+  int r;
+
+#ifdef _WIN32
+  no_term_signal = 1;
+#endif
+
+  init_process_options("spawn_helper4", kill_cb);
+
+  /* Verify that uv_spawn() resets the signal disposition. */
+#ifndef _WIN32
+  {
+    sigset_t set;
+    sigemptyset(&set);
+    sigaddset(&set, SIGTERM);
+    ASSERT_OK(pthread_sigmask(SIG_BLOCK, &set, NULL));
+  }
+  ASSERT_PTR_NE(SIG_ERR, signal(SIGTERM, SIG_IGN));
+#endif
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+#ifndef _WIN32
+  {
+    sigset_t set;
+    sigemptyset(&set);
+    sigaddset(&set, SIGTERM);
+    ASSERT_OK(pthread_sigmask(SIG_UNBLOCK, &set, NULL));
+  }
+  ASSERT_PTR_NE(SIG_ERR, signal(SIGTERM, SIG_DFL));
+#endif
+
+  /* Sending signum == 0 should check if the
+   * child process is still alive, not kill it.
+   */
+  r = uv_kill(process.pid, 0);
+  ASSERT_OK(r);
+
+  /* Kill the process. */
+  r = uv_kill(process.pid, SIGTERM);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+#ifdef _WIN32
+TEST_IMPL(spawn_detect_pipe_name_collisions_on_windows) {
+  int r;
+  uv_pipe_t out;
+  char name[64];
+  HANDLE pipe_handle;
+  uv_stdio_container_t stdio[2];
+
+  init_process_options("spawn_helper2", exit_cb);
+
+  uv_pipe_init(uv_default_loop(), &out, 0);
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_IGNORE;
+  options.stdio[1].flags = UV_CREATE_PIPE | UV_WRITABLE_PIPE;
+  options.stdio[1].data.stream = (uv_stream_t*) &out;
+  options.stdio_count = 2;
+
+  /* Create a pipe that'll cause a collision. */
+  snprintf(name,
+           sizeof(name),
+           "\\\\.\\pipe\\uv\\%p-%lu",
+           &out,
+           GetCurrentProcessId());
+  pipe_handle = CreateNamedPipeA(name,
+                                PIPE_ACCESS_INBOUND | FILE_FLAG_OVERLAPPED,
+                                PIPE_TYPE_BYTE | PIPE_READMODE_BYTE | PIPE_WAIT,
+                                10,
+                                65536,
+                                65536,
+                                0,
+                                NULL);
+  ASSERT_PTR_NE(pipe_handle, INVALID_HANDLE_VALUE);
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &out, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called); /* Once for process once for the pipe. */
+  printf("output is: %s", output);
+  ASSERT_OK(strcmp("hello world\n", output));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+#if !defined(USING_UV_SHARED)
+int make_program_args(char** args, int verbatim_arguments, WCHAR** dst_ptr);
+WCHAR* quote_cmd_arg(const WCHAR *source, WCHAR *target);
+
+TEST_IMPL(argument_escaping) {
+  const WCHAR* test_str[] = {
+    L"",
+    L"HelloWorld",
+    L"Hello World",
+    L"Hello\"World",
+    L"Hello World\\",
+    L"Hello\\\"World",
+    L"Hello\\World",
+    L"Hello\\\\World",
+    L"Hello World\\",
+    L"c:\\path\\to\\node.exe --eval \"require('c:\\\\path\\\\to\\\\test.js')\""
+  };
+  const int count = sizeof(test_str) / sizeof(*test_str);
+  WCHAR** test_output;
+  WCHAR* command_line;
+  WCHAR** cracked;
+  size_t total_size = 0;
+  int i;
+  int num_args;
+  int result;
+
+  char* verbatim[] = {
+    "cmd.exe",
+    "/c",
+    "c:\\path\\to\\node.exe --eval \"require('c:\\\\path\\\\to\\\\test.js')\"",
+    NULL
+  };
+  WCHAR* verbatim_output;
+  WCHAR* non_verbatim_output;
+
+  test_output = calloc(count, sizeof(WCHAR*));
+  ASSERT_NOT_NULL(test_output);
+  for (i = 0; i < count; ++i) {
+    test_output[i] = calloc(2 * (wcslen(test_str[i]) + 2), sizeof(WCHAR));
+    quote_cmd_arg(test_str[i], test_output[i]);
+    wprintf(L"input : %s\n", test_str[i]);
+    wprintf(L"output: %s\n", test_output[i]);
+    total_size += wcslen(test_output[i]) + 1;
+  }
+  command_line = calloc(total_size + 1, sizeof(WCHAR));
+  ASSERT_NOT_NULL(command_line);
+  for (i = 0; i < count; ++i) {
+    wcscat(command_line, test_output[i]);
+    wcscat(command_line, L" ");
+  }
+  command_line[total_size - 1] = L'\0';
+
+  wprintf(L"command_line: %s\n", command_line);
+
+  cracked = CommandLineToArgvW(command_line, &num_args);
+  for (i = 0; i < num_args; ++i) {
+    wprintf(L"%d: %s\t%s\n", i, test_str[i], cracked[i]);
+    ASSERT_OK(wcscmp(test_str[i], cracked[i]));
+  }
+
+  LocalFree(cracked);
+  for (i = 0; i < count; ++i) {
+    free(test_output[i]);
+  }
+  free(test_output);
+
+  result = make_program_args(verbatim, 1, &verbatim_output);
+  ASSERT_OK(result);
+  result = make_program_args(verbatim, 0, &non_verbatim_output);
+  ASSERT_OK(result);
+
+  wprintf(L"    verbatim_output: %s\n", verbatim_output);
+  wprintf(L"non_verbatim_output: %s\n", non_verbatim_output);
+
+  ASSERT_OK(wcscmp(verbatim_output,
+                   L"cmd.exe /c c:\\path\\to\\node.exe --eval "
+                   L"\"require('c:\\\\path\\\\to\\\\test.js')\""));
+  ASSERT_OK(wcscmp(non_verbatim_output,
+                   L"cmd.exe /c \"c:\\path\\to\\node.exe --eval "
+                   L"\\\"require('c:\\\\path\\\\to\\\\test.js')\\\"\""));
+
+  free(verbatim_output);
+  free(non_verbatim_output);
+
+  return 0;
+}
+
+int make_program_env(char** env_block, WCHAR** dst_ptr);
+
+TEST_IMPL(environment_creation) {
+  size_t i;
+  char* environment[] = {
+    "FOO=BAR",
+    "SYSTEM=ROOT", /* substring of a supplied var name */
+    "SYSTEMROOTED=OMG", /* supplied var name is a substring */
+    "TEMP=C:\\Temp",
+    "INVALID",
+    "BAZ=QUX",
+    "B_Z=QUX",
+    "B\xe2\x82\xacZ=QUX",
+    "B\xf0\x90\x80\x82Z=QUX",
+    "B\xef\xbd\xa1Z=QUX",
+    "B\xf0\xa3\x91\x96Z=QUX",
+    "BAZ", /* repeat, invalid variable */
+    NULL
+  };
+  WCHAR* wenvironment[] = {
+    L"BAZ=QUX",
+    L"B_Z=QUX",
+    L"B\x20acZ=QUX",
+    L"B\xd800\xdc02Z=QUX",
+    L"B\xd84d\xdc56Z=QUX",
+    L"B\xff61Z=QUX",
+    L"FOO=BAR",
+    L"SYSTEM=ROOT", /* substring of a supplied var name */
+    L"SYSTEMROOTED=OMG", /* supplied var name is a substring */
+    L"TEMP=C:\\Temp",
+  };
+  WCHAR* from_env[] = {
+    /* list should be kept in sync with list
+     * in process.c, minus variables in wenvironment */
+    L"HOMEDRIVE",
+    L"HOMEPATH",
+    L"LOGONSERVER",
+    L"PATH",
+    L"USERDOMAIN",
+    L"USERNAME",
+    L"USERPROFILE",
+    L"SYSTEMDRIVE",
+    L"SYSTEMROOT",
+    L"WINDIR",
+    /* test for behavior in the absence of a
+     * required-environment variable: */
+    L"ZTHIS_ENV_VARIABLE_DOES_NOT_EXIST",
+  };
+  int found_in_loc_env[ARRAY_SIZE(wenvironment)] = {0};
+  int found_in_usr_env[ARRAY_SIZE(from_env)] = {0};
+  WCHAR *expected[ARRAY_SIZE(from_env)];
+  int result;
+  WCHAR* str;
+  WCHAR* prev;
+  WCHAR* env;
+
+  for (i = 0; i < ARRAY_SIZE(from_env); i++) {
+      /* copy expected additions to environment locally */
+      size_t len = GetEnvironmentVariableW(from_env[i], NULL, 0);
+      if (len == 0) {
+        found_in_usr_env[i] = 1;
+        str = malloc(1 * sizeof(WCHAR));
+        *str = 0;
+        expected[i] = str;
+      } else {
+        size_t name_len = wcslen(from_env[i]);
+        str = malloc((name_len+1+len) * sizeof(WCHAR));
+        wmemcpy(str, from_env[i], name_len);
+        expected[i] = str;
+        str += name_len;
+        *str++ = L'=';
+        GetEnvironmentVariableW(from_env[i], str, len);
+     }
+  }
+
+  result = make_program_env(environment, &env);
+  ASSERT_OK(result);
+
+  for (str = env, prev = NULL; *str; prev = str, str += wcslen(str) + 1) {
+    int found = 0;
+#if 0
+    _cputws(str);
+    putchar('\n');
+#endif
+    for (i = 0; i < ARRAY_SIZE(wenvironment) && !found; i++) {
+      if (!wcscmp(str, wenvironment[i])) {
+        ASSERT(!found_in_loc_env[i]);
+        found_in_loc_env[i] = 1;
+        found = 1;
+      }
+    }
+    for (i = 0; i < ARRAY_SIZE(expected) && !found; i++) {
+      if (!wcscmp(str, expected[i])) {
+        ASSERT(!found_in_usr_env[i]);
+        found_in_usr_env[i] = 1;
+        found = 1;
+      }
+    }
+    if (prev) { /* verify sort order */
+      ASSERT_EQ(1, CompareStringOrdinal(prev, -1, str, -1, TRUE));
+    }
+    ASSERT(found); /* verify that we expected this variable */
+  }
+
+  /* verify that we found all expected variables */
+  for (i = 0; i < ARRAY_SIZE(wenvironment); i++) {
+    ASSERT(found_in_loc_env[i]);
+  }
+  for (i = 0; i < ARRAY_SIZE(expected); i++) {
+    ASSERT(found_in_usr_env[i]);
+  }
+
+  return 0;
+}
+#endif
+
+/* Regression test for issue #909 */
+TEST_IMPL(spawn_with_an_odd_path) {
+  int r;
+
+  char newpath[2048];
+  char *path = getenv("PATH");
+  ASSERT_NOT_NULL(path);
+  snprintf(newpath, 2048, ";.;%s", path);
+  SetEnvironmentVariable("PATH", newpath);
+
+  init_process_options("", exit_cb);
+  options.file = options.args[0] = "program-that-had-better-not-exist";
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT(r == UV_ENOENT || r == UV_EACCES);
+  ASSERT_OK(uv_is_active((uv_handle_t*) &process));
+  uv_close((uv_handle_t*) &process, NULL);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_no_path) {
+  char* env[1];
+  WCHAR* old_path = NULL;
+  DWORD old_path_len;
+
+  if ((old_path_len = GetEnvironmentVariableW(L"PATH", NULL, 0)) > 0) {
+    old_path = malloc(old_path_len * sizeof(WCHAR));
+    GetEnvironmentVariableW(L"PATH", old_path, old_path_len);
+    SetEnvironmentVariableW(L"PATH", NULL);
+  }
+
+  init_process_options("spawn_helper1", exit_cb);
+  options.env = env;
+  env[0] = NULL;
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  SetEnvironmentVariableW(L"PATH", old_path);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_no_ext) {
+  char new_exepath[1024];
+
+  init_process_options("spawn_helper1", exit_cb);
+  options.flags |= UV_PROCESS_WINDOWS_FILE_PATH_EXACT_NAME;
+  snprintf(new_exepath, sizeof(new_exepath), "%.*s_no_ext",
+           (int) (exepath_size - sizeof(".exe") + 1),
+           exepath);
+  options.file = options.args[0] = new_exepath;
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_path_no_ext) {
+  int r;
+  int len;
+  int file_len;
+  char file[64];
+  char path[1024];
+  char* env[2];
+
+  /* Set up the process, but make sure that the file to run is relative and
+   * requires a lookup into PATH. */
+  init_process_options("spawn_helper1", exit_cb);
+  options.flags |= UV_PROCESS_WINDOWS_FILE_PATH_EXACT_NAME;
+
+  /* Set up the PATH env variable */
+  for (len = strlen(exepath), file_len = 0;
+       exepath[len - 1] != '/' && exepath[len - 1] != '\\';
+       len--, file_len++);
+  snprintf(file, sizeof(file), "%.*s_no_ext",
+           (int) (file_len - sizeof(".exe") + 1),
+           exepath + len);
+  exepath[len] = 0;
+  snprintf(path, sizeof(path), "PATH=%s", exepath);
+
+  env[0] = path;
+  env[1] = NULL;
+
+  options.file = options.args[0] = file;
+  options.env = env;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT(r == UV_ENOENT || r == UV_EACCES);
+  ASSERT_OK(uv_is_active((uv_handle_t*) &process));
+  uv_close((uv_handle_t*) &process, NULL);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+#endif
+
+#ifndef _WIN32
+TEST_IMPL(spawn_setuid_setgid) {
+  int r;
+  struct passwd* pw;
+  char uidstr[10];
+  char gidstr[10];
+
+  /* if not root, then this will fail. */
+  uv_uid_t uid = getuid();
+  if (uid != 0) {
+    RETURN_SKIP("It should be run as root user");
+  }
+
+  init_process_options("spawn_helper_setuid_setgid", exit_cb);
+
+  /* become the "nobody" user. */
+  pw = getpwnam("nobody");
+  ASSERT_NOT_NULL(pw);
+  options.uid = pw->pw_uid;
+  options.gid = pw->pw_gid;
+  snprintf(uidstr, sizeof(uidstr), "%d", pw->pw_uid);
+  snprintf(gidstr, sizeof(gidstr), "%d", pw->pw_gid);
+  options.args[2] = uidstr;
+  options.args[3] = gidstr;
+  options.flags = UV_PROCESS_SETUID | UV_PROCESS_SETGID;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  if (r == UV_EACCES)
+    RETURN_SKIP("user 'nobody' cannot access the test runner");
+
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+#endif
+
+
+#ifndef _WIN32
+TEST_IMPL(spawn_setuid_fails) {
+  int r;
+
+  /* if root, become nobody. */
+  /* On IBMi PASE, there is no nobody user. */
+#ifndef __PASE__
+  uv_uid_t uid = getuid();
+  if (uid == 0) {
+    struct passwd* pw;
+    pw = getpwnam("nobody");
+    ASSERT_NOT_NULL(pw);
+    ASSERT_OK(setgid(pw->pw_gid));
+    ASSERT_OK(setuid(pw->pw_uid));
+  }
+#endif  /* !__PASE__ */
+
+  init_process_options("spawn_helper1", fail_cb);
+
+  options.flags |= UV_PROCESS_SETUID;
+  /* On IBMi PASE, there is no root user. User may grant
+   * root-like privileges, including setting uid to 0.
+   */
+#if defined(__PASE__)
+  options.uid = -1;
+#else
+  options.uid = 0;
+#endif
+
+  /* These flags should be ignored on Unices. */
+  options.flags |= UV_PROCESS_WINDOWS_HIDE;
+  options.flags |= UV_PROCESS_WINDOWS_HIDE_CONSOLE;
+  options.flags |= UV_PROCESS_WINDOWS_HIDE_GUI;
+  options.flags |= UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+#if defined(__CYGWIN__)
+  ASSERT_EQ(r, UV_EINVAL);
+#else
+  ASSERT_EQ(r, UV_EPERM);
+#endif
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_OK(close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_setgid_fails) {
+  int r;
+
+  /* if root, become nobody. */
+  /* On IBMi PASE, there is no nobody user. */
+#ifndef __PASE__
+  uv_uid_t uid = getuid();
+  if (uid == 0) {
+    struct passwd* pw;
+    pw = getpwnam("nobody");
+    ASSERT_NOT_NULL(pw);
+    ASSERT_OK(setgid(pw->pw_gid));
+    ASSERT_OK(setuid(pw->pw_uid));
+  }
+#endif  /* !__PASE__ */
+
+  init_process_options("spawn_helper1", fail_cb);
+
+  options.flags |= UV_PROCESS_SETGID;
+  /* On IBMi PASE, there is no root user. User may grant
+   * root-like privileges, including setting gid to 0.
+   */
+#if defined(__MVS__) || defined(__PASE__)
+  options.gid = -1;
+#else
+  options.gid = 0;
+#endif
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+#if defined(__CYGWIN__) || defined(__MVS__)
+  ASSERT_EQ(r, UV_EINVAL);
+#else
+  ASSERT_EQ(r, UV_EPERM);
+#endif
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_OK(close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+#endif
+
+
+#ifdef _WIN32
+
+static void exit_cb_unexpected(uv_process_t* process,
+                               int64_t exit_status,
+                               int term_signal) {
+  ASSERT(0 && "should not have been called");
+}
+
+
+TEST_IMPL(spawn_setuid_fails) {
+  int r;
+
+  init_process_options("spawn_helper1", exit_cb_unexpected);
+
+  options.flags |= UV_PROCESS_SETUID;
+  options.uid = (uv_uid_t) -42424242;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_EQ(r, UV_ENOTSUP);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_OK(close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_setgid_fails) {
+  int r;
+
+  init_process_options("spawn_helper1", exit_cb_unexpected);
+
+  options.flags |= UV_PROCESS_SETGID;
+  options.gid = (uv_gid_t) -42424242;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_EQ(r, UV_ENOTSUP);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_OK(close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+#endif
+
+
+TEST_IMPL(spawn_auto_unref) {
+  init_process_options("spawn_helper1", NULL);
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+  ASSERT_OK(uv_is_closing((uv_handle_t*) &process));
+  uv_close((uv_handle_t*) &process, NULL);
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+  ASSERT_EQ(1, uv_is_closing((uv_handle_t*) &process));
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_fs_open) {
+  int r;
+  uv_os_fd_t fd;
+  uv_os_fd_t dup_fd;
+  uv_fs_t fs_req;
+  uv_pipe_t in;
+  uv_write_t write_req;
+  uv_write_t write_req2;
+  uv_buf_t buf;
+  uv_stdio_container_t stdio[1];
+#ifdef _WIN32
+  const char dev_null[] = "NUL";
+  HMODULE kernelbase_module;
+  sCompareObjectHandles pCompareObjectHandles; /* function introduced in Windows 10 */
+#else
+  const char dev_null[] = "/dev/null";
+#endif
+
+  r = uv_fs_open(NULL, &fs_req, dev_null, UV_FS_O_RDWR, 0, NULL);
+  ASSERT_NE(r, -1);
+  fd = uv_get_osfhandle((uv_file) fs_req.result);
+  uv_fs_req_cleanup(&fs_req);
+
+  init_process_options("spawn_helper8", exit_cb);
+
+  ASSERT_OK(uv_pipe_init(uv_default_loop(), &in, 0));
+
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_CREATE_PIPE | UV_READABLE_PIPE;
+  options.stdio[0].data.stream = (uv_stream_t*) &in;
+  options.stdio_count = 1;
+
+  /* make an inheritable copy */
+#ifdef _WIN32
+  ASSERT_NE(0, DuplicateHandle(GetCurrentProcess(), fd, GetCurrentProcess(), &dup_fd,
+                               0, /* inherit */ TRUE, DUPLICATE_SAME_ACCESS));
+  kernelbase_module = GetModuleHandleA("kernelbase.dll");
+  pCompareObjectHandles = (sCompareObjectHandles)
+      GetProcAddress(kernelbase_module, "CompareObjectHandles");
+  ASSERT_NE(pCompareObjectHandles == NULL ||
+            pCompareObjectHandles(fd, dup_fd),
+            0);
+#else
+  dup_fd = dup(fd);
+#endif
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+
+  buf = uv_buf_init((char*) &fd, sizeof(fd));
+  ASSERT_OK(uv_write(&write_req,
+                     (uv_stream_t*) &in,
+                     &buf,
+                     1,
+                     write_null_cb));
+
+  buf = uv_buf_init((char*) &dup_fd, sizeof(fd));
+  ASSERT_OK(uv_write(&write_req2, (uv_stream_t*) &in, &buf, 1, write_cb));
+
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+  ASSERT_OK(uv_fs_close(NULL, &fs_req, r, NULL));
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(2, close_cb_called);  /* One for `in`, one for process */
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(closed_fd_events) {
+  uv_stdio_container_t stdio[3];
+  uv_pipe_t pipe_handle;
+  uv_fs_t req;
+  uv_buf_t bufs[1];
+  uv_file fd[2];
+  bufs[0] = uv_buf_init("", 1);
+
+  /* create a pipe and share it with a child process */
+  ASSERT_OK(uv_pipe(fd, 0, 0));
+  ASSERT_GT(fd[0], 2);
+  ASSERT_GT(fd[1], 2);
+
+  /* spawn_helper4 blocks indefinitely. */
+  init_process_options("spawn_helper4", exit_cb);
+  options.stdio_count = 3;
+  options.stdio = stdio;
+  options.stdio[0].flags = UV_INHERIT_FD;
+  options.stdio[0].data.fd = fd[0];
+  options.stdio[1].flags = UV_IGNORE;
+  options.stdio[2].flags = UV_IGNORE;
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  uv_unref((uv_handle_t*) &process);
+
+  /* read from the pipe with uv */
+  ASSERT_OK(uv_pipe_init(uv_default_loop(), &pipe_handle, 0));
+  ASSERT_OK(uv_pipe_open(&pipe_handle, fd[0]));
+  /* uv_pipe_open() takes ownership of the file descriptor. */
+  fd[0] = -1;
+
+  ASSERT_OK(uv_read_start((uv_stream_t*) &pipe_handle,
+                          on_alloc,
+                          on_read_once));
+
+  ASSERT_EQ(1, uv_fs_write(NULL, &req, fd[1], bufs, 1, -1, NULL));
+  ASSERT_EQ(1, req.result);
+  uv_fs_req_cleanup(&req);
+
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_ONCE));
+
+  /* should have received just one byte */
+  ASSERT_EQ(1, output_used);
+
+  /* close the pipe and see if we still get events */
+  uv_close((uv_handle_t*) &pipe_handle, close_cb);
+
+  ASSERT_EQ(1, uv_fs_write(NULL, &req, fd[1], bufs, 1, -1, NULL));
+  ASSERT_EQ(1, req.result);
+  uv_fs_req_cleanup(&req);
+
+  ASSERT_OK(uv_timer_init(uv_default_loop(), &timer));
+  ASSERT_OK(uv_timer_start(&timer, timer_counter_cb, 10, 0));
+
+  /* see if any spurious events interrupt the timer */
+  if (1 == uv_run(uv_default_loop(), UV_RUN_ONCE))
+    /* have to run again to really trigger the timer */
+    ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_ONCE));
+
+  ASSERT_EQ(1, timer_counter);
+
+  /* cleanup */
+  ASSERT_OK(uv_process_kill(&process, SIGTERM));
+#ifdef _WIN32
+  ASSERT_OK(_close(fd[1]));
+#else
+  ASSERT_OK(close(fd[1]));
+#endif
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+
+TEST_IMPL(spawn_reads_child_path) {
+  int r;
+  int len;
+  char file[64];
+  char path[1024];
+  char* env[3];
+
+  /* Need to carry over the dynamic linker path when the test runner is
+   * linked against libuv.so, see https://github.com/libuv/libuv/issues/85.
+   */
+#if defined(__APPLE__)
+  static const char dyld_path_var[] = "DYLD_LIBRARY_PATH";
+#elif defined(__MVS__) || defined(__PASE__)
+  static const char dyld_path_var[] = "LIBPATH";
+#else
+  static const char dyld_path_var[] = "LD_LIBRARY_PATH";
+#endif
+
+  /* Set up the process, but make sure that the file to run is relative and
+   * requires a lookup into PATH. */
+  init_process_options("spawn_helper1", exit_cb);
+
+  /* Set up the PATH env variable */
+  for (len = strlen(exepath);
+       exepath[len - 1] != '/' && exepath[len - 1] != '\\';
+       len--);
+  strcpy(file, exepath + len);
+  exepath[len] = 0;
+  strcpy(path, "PATH=");
+  strcpy(path + 5, exepath);
+#if defined(__CYGWIN__) || defined(__MSYS__)
+  /* Carry over the dynamic linker path in case the test runner
+     is linked against cyguv-1.dll or msys-uv-1.dll, see above.  */
+  {
+    char* syspath = getenv("PATH");
+    if (syspath != NULL) {
+      strcat(path, ":");
+      strcat(path, syspath);
+    }
+  }
+#endif
+
+  env[0] = path;
+  env[1] = getenv(dyld_path_var);
+  env[2] = NULL;
+
+  if (env[1] != NULL) {
+    static char buf[1024 + sizeof(dyld_path_var)];
+    snprintf(buf, sizeof(buf), "%s=%s", dyld_path_var, env[1]);
+    env[1] = buf;
+  }
+
+  options.file = file;
+  options.args[0] = file;
+  options.env = env;
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+TEST_IMPL(spawn_inherit_streams) {
+  uv_process_t child_req;
+  uv_stdio_container_t child_stdio[2];
+  int fds_stdin[2];
+  int fds_stdout[2];
+  uv_pipe_t pipe_stdin_child;
+  uv_pipe_t pipe_stdout_child;
+  uv_pipe_t pipe_stdin_parent;
+  uv_pipe_t pipe_stdout_parent;
+  unsigned char ubuf[OUTPUT_SIZE - 1];
+  uv_buf_t buf;
+  unsigned int i;
+  int r;
+  int bidir;
+  uv_write_t write_req;
+  uv_loop_t* loop;
+
+  init_process_options("spawn_helper9", exit_cb);
+
+  loop = uv_default_loop();
+  ASSERT_OK(uv_pipe_init(loop, &pipe_stdin_child, 0));
+  ASSERT_OK(uv_pipe_init(loop, &pipe_stdout_child, 0));
+  ASSERT_OK(uv_pipe_init(loop, &pipe_stdin_parent, 0));
+  ASSERT_OK(uv_pipe_init(loop, &pipe_stdout_parent, 0));
+
+  ASSERT_OK(uv_pipe(fds_stdin, 0, 0));
+  ASSERT_OK(uv_pipe(fds_stdout, 0, 0));
+
+  ASSERT_OK(uv_pipe_open(&pipe_stdin_child, fds_stdin[0]));
+  ASSERT_OK(uv_pipe_open(&pipe_stdout_child, fds_stdout[1]));
+  ASSERT_OK(uv_pipe_open(&pipe_stdin_parent, fds_stdin[1]));
+  ASSERT_OK(uv_pipe_open(&pipe_stdout_parent, fds_stdout[0]));
+  ASSERT(uv_is_readable((uv_stream_t*) &pipe_stdin_child));
+  ASSERT(uv_is_writable((uv_stream_t*) &pipe_stdout_child));
+  ASSERT(uv_is_writable((uv_stream_t*) &pipe_stdin_parent));
+  ASSERT(uv_is_readable((uv_stream_t*) &pipe_stdout_parent));
+  /* Some systems (SVR4) open a bidirectional pipe, most don't. */
+  bidir = uv_is_writable((uv_stream_t*) &pipe_stdin_child);
+  ASSERT_EQ(uv_is_readable((uv_stream_t*) &pipe_stdout_child), bidir);
+  ASSERT_EQ(uv_is_readable((uv_stream_t*) &pipe_stdin_parent), bidir);
+  ASSERT_EQ(uv_is_writable((uv_stream_t*) &pipe_stdout_parent), bidir);
+
+  child_stdio[0].flags = UV_INHERIT_STREAM;
+  child_stdio[0].data.stream = (uv_stream_t *) &pipe_stdin_child;
+
+  child_stdio[1].flags = UV_INHERIT_STREAM;
+  child_stdio[1].data.stream = (uv_stream_t *) &pipe_stdout_child;
+
+  options.stdio = child_stdio;
+  options.stdio_count = 2;
+
+  ASSERT_OK(uv_spawn(loop, &child_req, &options));
+
+  uv_close((uv_handle_t*) &pipe_stdin_child, NULL);
+  uv_close((uv_handle_t*) &pipe_stdout_child, NULL);
+
+  buf = uv_buf_init((char*) ubuf, sizeof ubuf);
+  for (i = 0; i < sizeof ubuf; ++i)
+    ubuf[i] = i & 255u;
+  memset(output, 0, sizeof ubuf);
+
+  r = uv_write(&write_req,
+               (uv_stream_t*) &pipe_stdin_parent,
+               &buf,
+               1,
+               write_cb);
+  ASSERT_OK(r);
+
+  r = uv_read_start((uv_stream_t*) &pipe_stdout_parent, on_alloc, on_read);
+  ASSERT_OK(r);
+
+  r = uv_run(loop, UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(3, close_cb_called);
+
+  r = memcmp(ubuf, output, sizeof ubuf);
+  ASSERT_OK(r);
+
+  MAKE_VALGRIND_HAPPY(loop);
+  return 0;
+}
+
+TEST_IMPL(spawn_quoted_path) {
+#ifndef _WIN32
+  RETURN_SKIP("Test for Windows");
+#else
+  char* quoted_path_env[2];
+  args[0] = "not_existing";
+  args[1] = NULL;
+  options.file = args[0];
+  options.args = args;
+  options.exit_cb = exit_cb;
+  options.flags = 0;
+  /* We test if search_path works correctly with semicolons in quoted path. We
+   * will use an invalid drive, so we are sure no executable is spawned. */
+  quoted_path_env[0] = "PATH=\"xyz:\\test;\";xyz:\\other";
+  quoted_path_env[1] = NULL;
+  options.env = quoted_path_env;
+
+  /* We test if libuv will not segfault. */
+  uv_spawn(uv_default_loop(), &process, &options);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+#endif
+}
+
+TEST_IMPL(spawn_exercise_sigchld_issue) {
+  int r;
+  int i;
+  uv_process_options_t dummy_options = {0};
+  uv_process_t dummy_processes[100];
+  char* args[2];
+
+  init_process_options("spawn_helper1", exit_cb);
+
+  r = uv_spawn(uv_default_loop(), &process, &options);
+  ASSERT_OK(r);
+
+  // This test exercises a bug in the darwin kernel that causes SIGCHLD not to
+  // be delivered sometimes. Calling posix_spawn many times increases the
+  // likelihood of encountering this issue, so spin a few times to make this
+  // test more reliable.
+  dummy_options.file = args[0] = "program-that-had-better-not-exist";
+  args[1] = NULL;
+  dummy_options.args = args;
+  dummy_options.exit_cb = fail_cb;
+  dummy_options.flags = 0;
+  for (i = 0; i < 100; i++) {
+    r = uv_spawn(uv_default_loop(), &dummy_processes[i], &dummy_options);
+    if (r != UV_ENOENT)
+      ASSERT_EQ(r, UV_EACCES);
+    uv_close((uv_handle_t*) &dummy_processes[i], close_cb);
+  }
+
+  r = uv_run(uv_default_loop(), UV_RUN_DEFAULT);
+  ASSERT_OK(r);
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(101, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}
+
+/* Helper for child process of spawn_inherit_streams */
+#ifndef _WIN32
+void spawn_stdin_stdout(void) {
+  char buf[1024];
+  char* pbuf;
+  for (;;) {
+    ssize_t r, w, c;
+    do {
+      r = read(0, buf, sizeof buf);
+    } while (r == -1 && errno == EINTR);
+    if (r == 0) {
+      return;
+    }
+    ASSERT_GT(r, 0);
+    c = r;
+    pbuf = buf;
+    while (c) {
+      do {
+        w = write(1, pbuf, (size_t)c);
+      } while (w == -1 && errno == EINTR);
+      ASSERT_GE(w, 0);
+      pbuf = pbuf + w;
+      c = c - w;
+    }
+  }
+}
+#else
+void spawn_stdin_stdout(void) {
+  char buf[1024];
+  char* pbuf;
+  HANDLE h_stdin = GetStdHandle(STD_INPUT_HANDLE);
+  HANDLE h_stdout = GetStdHandle(STD_OUTPUT_HANDLE);
+  ASSERT_PTR_NE(h_stdin, INVALID_HANDLE_VALUE);
+  ASSERT_PTR_NE(h_stdout, INVALID_HANDLE_VALUE);
+  for (;;) {
+    DWORD n_read;
+    DWORD n_written;
+    DWORD to_write;
+    if (!ReadFile(h_stdin, buf, sizeof buf, &n_read, NULL)) {
+      ASSERT_EQ(GetLastError(), ERROR_BROKEN_PIPE);
+      return;
+    }
+    to_write = n_read;
+    pbuf = buf;
+    while (to_write) {
+      ASSERT(WriteFile(h_stdout, pbuf, to_write, &n_written, NULL));
+      to_write -= n_written;
+      pbuf += n_written;
+    }
+  }
+}
+#endif /* !_WIN32 */
+
+TEST_IMPL(spawn_relative_path) {
+  char* sep;
+
+  init_process_options("spawn_helper1", exit_cb);
+
+  exepath_size = sizeof(exepath) - 2;
+  ASSERT_OK(uv_exepath(exepath, &exepath_size));
+  exepath[exepath_size] = '\0';
+
+  /* Poor man's basename(3). */
+  sep = strrchr(exepath, '/');
+  if (sep == NULL)
+    sep = strrchr(exepath, '\\');
+  ASSERT_NOT_NULL(sep);
+
+  /* Split into dirname and basename and make basename relative. */
+  memmove(sep + 2, sep, 1 + strlen(sep));
+  sep[0] = '\0';
+  sep[1] = '.';
+  sep[2] = '/';
+
+  options.cwd = exepath;
+  options.file = options.args[0] = sep + 1;
+
+  ASSERT_OK(uv_spawn(uv_default_loop(), &process, &options));
+  ASSERT_OK(uv_run(uv_default_loop(), UV_RUN_DEFAULT));
+
+  ASSERT_EQ(1, exit_cb_called);
+  ASSERT_EQ(1, close_cb_called);
+
+  MAKE_VALGRIND_HAPPY(uv_default_loop());
+  return 0;
+}