Delete old process_handle_t code.

This patch removes the old process_handle_t code. Everything should by
now be using the process_t interface.

See: https://bugs.torproject.org/28179

12 files changed, 16 insertions, 1947 deletions

diff --git a/.gitignore b/.gitignore
index df8db1113a..60635263ad 100644
--- a/.gitignore
+++ b/.gitignore
@@ -239,7 +239,6 @@ uptime-*.json
 /src/test/test
 /src/test/test-slow
 /src/test/test-bt-cl
-/src/test/test-child
 /src/test/test-process
 /src/test/test-memwipe
 /src/test/test-ntor-cl
@@ -250,7 +249,6 @@ uptime-*.json
 /src/test/test.exe
 /src/test/test-slow.exe
 /src/test/test-bt-cl.exe
-/src/test/test-child.exe
 /src/test/test-process.exe
 /src/test/test-ntor-cl.exe
 /src/test/test-hs-ntor-cl.exe
diff --git a/src/feature/client/transports.c b/src/feature/client/transports.c
index dc76e9c245..fd4bec7807 100644
--- a/src/feature/client/transports.c
+++ b/src/feature/client/transports.c
@@ -913,22 +913,6 @@ handle_proxy_line(const char *line, managed_proxy_t *mp)
   } else if (!strcmpstart(line, PROTO_LOG)) {
     parse_log_line(line);
     return;
-  } else if (!strcmpstart(line, SPAWN_ERROR_MESSAGE)) {
-    /* managed proxy launch failed: parse error message to learn why. */
-    int retval, child_state, saved_errno;
-    retval = tor_sscanf(line, SPAWN_ERROR_MESSAGE "%x/%x",
-                        &child_state, &saved_errno);
-    if (retval == 2) {
-      log_warn(LD_GENERAL,
-               "Could not launch managed proxy executable at '%s' ('%s').",
-               mp->argv[0], strerror(saved_errno));
-    } else { /* failed to parse error message */
-      log_warn(LD_GENERAL,"Could not launch managed proxy executable at '%s'.",
-               mp->argv[0]);
-    }
-
-    mp->conf_state = PT_PROTO_FAILED_LAUNCH;
-    return;
   }
 
   log_notice(LD_GENERAL, "Unknown line received by managed proxy (%s).", line);
diff --git a/src/lib/process/subprocess.c b/src/lib/process/subprocess.c
index 70851c15e0..c163790155 100644
--- a/src/lib/process/subprocess.c
+++ b/src/lib/process/subprocess.c
@@ -142,236 +142,6 @@ tor_join_win_cmdline(const char *argv[])
   return joined_argv;
 }
 
-#ifndef _WIN32
-/** Format <b>child_state</b> and <b>saved_errno</b> as a hex string placed in
- * <b>hex_errno</b>.  Called between fork and _exit, so must be signal-handler
- * safe.
- *
- * <b>hex_errno</b> must have at least HEX_ERRNO_SIZE+1 bytes available.
- *
- * The format of <b>hex_errno</b> is: "CHILD_STATE/ERRNO\n", left-padded
- * with spaces. CHILD_STATE indicates where
- * in the process of starting the child process did the failure occur (see
- * CHILD_STATE_* macros for definition), and SAVED_ERRNO is the value of
- * errno when the failure occurred.
- *
- * On success return the number of characters added to hex_errno, not counting
- * the terminating NUL; return -1 on error.
- */
-STATIC int
-format_helper_exit_status(unsigned char child_state, int saved_errno,
-                          char *hex_errno)
-{
-  unsigned int unsigned_errno;
-  int written, left;
-  char *cur;
-  size_t i;
-  int res = -1;
-
-  /* Fill hex_errno with spaces, and a trailing newline (memset may
-     not be signal handler safe, so we can't use it) */
-  for (i = 0; i < (HEX_ERRNO_SIZE - 1); i++)
-    hex_errno[i] = ' ';
-  hex_errno[HEX_ERRNO_SIZE - 1] = '\n';
-
-  /* Convert errno to be unsigned for hex conversion */
-  if (saved_errno < 0) {
-    // Avoid overflow on the cast to unsigned int when result is INT_MIN
-    // by adding 1 to the signed int negative value,
-    // then, after it has been negated and cast to unsigned,
-    // adding the original 1 back (the double-addition is intentional).
-    // Otherwise, the cast to signed could cause a temporary int
-    // to equal INT_MAX + 1, which is undefined.
-    unsigned_errno = ((unsigned int) -(saved_errno + 1)) + 1;
-  } else {
-    unsigned_errno = (unsigned int) saved_errno;
-  }
-
-  /*
-   * Count how many chars of space we have left, and keep a pointer into the
-   * current point in the buffer.
-   */
-  left = HEX_ERRNO_SIZE+1;
-  cur = hex_errno;
-
-  /* Emit child_state */
-  written = format_hex_number_sigsafe(child_state, cur, left);
-
-  if (written <= 0)
-    goto err;
-
-  /* Adjust left and cur */
-  left -= written;
-  cur += written;
-  if (left <= 0)
-    goto err;
-
-  /* Now the '/' */
-  *cur = '/';
-
-  /* Adjust left and cur */
-  ++cur;
-  --left;
-  if (left <= 0)
-    goto err;
-
-  /* Need minus? */
-  if (saved_errno < 0) {
-    *cur = '-';
-    ++cur;
-    --left;
-    if (left <= 0)
-      goto err;
-  }
-
-  /* Emit unsigned_errno */
-  written = format_hex_number_sigsafe(unsigned_errno, cur, left);
-
-  if (written <= 0)
-    goto err;
-
-  /* Adjust left and cur */
-  left -= written;
-  cur += written;
-
-  /* Check that we have enough space left for a newline and a NUL */
-  if (left <= 1)
-    goto err;
-
-  /* Emit the newline and NUL */
-  *cur++ = '\n';
-  *cur++ = '\0';
-
-  res = (int)(cur - hex_errno - 1);
-
-  goto done;
-
- err:
-  /*
-   * In error exit, just write a '\0' in the first char so whatever called
-   * this at least won't fall off the end.
-   */
-  *hex_errno = '\0';
-
- done:
-  return res;
-}
-#endif /* !defined(_WIN32) */
-
-/* Maximum number of file descriptors, if we cannot get it via sysconf() */
-#define DEFAULT_MAX_FD 256
-
-/** Terminate the process of <b>process_handle</b>, if that process has not
- * already exited.
- *
- * Return 0 if we succeeded in terminating the process (or if the process
- * already exited), and -1 if we tried to kill the process but failed.
- *
- * Based on code originally borrowed from Python's os.kill. */
-int
-tor_terminate_process(process_handle_t *process_handle)
-{
-#ifdef _WIN32
-  if (tor_get_exit_code(process_handle, 0, NULL) == PROCESS_EXIT_RUNNING) {
-    HANDLE handle = process_handle->pid.hProcess;
-
-    if (!TerminateProcess(handle, 0))
-      return -1;
-    else
-      return 0;
-  }
-#else /* !(defined(_WIN32)) */
-  if (process_handle->waitpid_cb) {
-    /* We haven't got a waitpid yet, so we can just kill off the process. */
-    return kill(process_handle->pid, SIGTERM);
-  }
-#endif /* defined(_WIN32) */
-
-  return 0; /* We didn't need to kill the process, so report success */
-}
-
-/** Return the Process ID of <b>process_handle</b>. */
-int
-tor_process_get_pid(process_handle_t *process_handle)
-{
-#ifdef _WIN32
-  return (int) process_handle->pid.dwProcessId;
-#else
-  return (int) process_handle->pid;
-#endif
-}
-
-#ifdef _WIN32
-HANDLE
-tor_process_get_stdout_pipe(process_handle_t *process_handle)
-{
-  return process_handle->stdout_pipe;
-}
-#else /* !(defined(_WIN32)) */
-/* DOCDOC tor_process_get_stdout_pipe */
-int
-tor_process_get_stdout_pipe(process_handle_t *process_handle)
-{
-  return process_handle->stdout_pipe;
-}
-#endif /* defined(_WIN32) */
-
-/* DOCDOC process_handle_new */
-static process_handle_t *
-process_handle_new(void)
-{
-  process_handle_t *out = tor_malloc_zero(sizeof(process_handle_t));
-
-#ifdef _WIN32
-  out->stdin_pipe = INVALID_HANDLE_VALUE;
-  out->stdout_pipe = INVALID_HANDLE_VALUE;
-  out->stderr_pipe = INVALID_HANDLE_VALUE;
-#else
-  out->stdin_pipe = -1;
-  out->stdout_pipe = -1;
-  out->stderr_pipe = -1;
-#endif /* defined(_WIN32) */
-
-  return out;
-}
-
-#ifndef _WIN32
-/** Invoked when a process that we've launched via tor_spawn_background() has
- * been found to have terminated.
- */
-static void
-process_handle_waitpid_cb(int status, void *arg)
-{
-  process_handle_t *process_handle = arg;
-
-  process_handle->waitpid_exit_status = status;
-  clear_waitpid_callback(process_handle->waitpid_cb);
-  if (process_handle->status == PROCESS_STATUS_RUNNING)
-    process_handle->status = PROCESS_STATUS_NOTRUNNING;
-  process_handle->waitpid_cb = 0;
-}
-#endif /* !defined(_WIN32) */
-
-/**
- * @name child-process states
- *
- * Each of these values represents a possible state that a child process can
- * be in.  They're used to determine what to say when telling the parent how
- * far along we were before failure.
- *
- * @{
- */
-#define CHILD_STATE_INIT 0
-#define CHILD_STATE_PIPE 1
-#define CHILD_STATE_MAXFD 2
-#define CHILD_STATE_FORK 3
-#define CHILD_STATE_DUPOUT 4
-#define CHILD_STATE_DUPERR 5
-#define CHILD_STATE_DUPIN 6
-#define CHILD_STATE_CLOSEFD 7
-#define CHILD_STATE_EXEC 8
-#define CHILD_STATE_FAILEXEC 9
-/** @} */
 /**
  * Boolean.  If true, then Tor may call execve or CreateProcess via
  * tor_spawn_background.
@@ -386,851 +156,3 @@ tor_disable_spawning_background_processes(void)
 {
   may_spawn_background_process = 0;
 }
-/** Start a program in the background. If <b>filename</b> contains a '/', then
- * it will be treated as an absolute or relative path.  Otherwise, on
- * non-Windows systems, the system path will be searched for <b>filename</b>.
- * On Windows, only the current directory will be searched. Here, to search the
- * system path (as well as the application directory, current working
- * directory, and system directories), set filename to NULL.
- *
- * The strings in <b>argv</b> will be passed as the command line arguments of
- * the child program (following convention, argv[0] should normally be the
- * filename of the executable, and this must be the case if <b>filename</b> is
- * NULL). The last element of argv must be NULL. A handle to the child process
- * will be returned in process_handle (which must be non-NULL). Read
- * process_handle.status to find out if the process was successfully launched.
- * For convenience, process_handle.status is returned by this function.
- *
- * Some parts of this code are based on the POSIX subprocess module from
- * Python, and example code from
- * http://msdn.microsoft.com/en-us/library/ms682499%28v=vs.85%29.aspx.
- */
-int
-tor_spawn_background(const char *const filename, const char **argv,
-                     process_environment_t *env,
-                     process_handle_t **process_handle_out)
-{
-  if (BUG(may_spawn_background_process == 0)) {
-    /* We should never reach this point if we're forbidden to spawn
-     * processes. Instead we should have caught the attempt earlier. */
-    return PROCESS_STATUS_ERROR;
-  }
-
-#ifdef _WIN32
-  HANDLE stdout_pipe_read = NULL;
-  HANDLE stdout_pipe_write = NULL;
-  HANDLE stderr_pipe_read = NULL;
-  HANDLE stderr_pipe_write = NULL;
-  HANDLE stdin_pipe_read = NULL;
-  HANDLE stdin_pipe_write = NULL;
-  process_handle_t *process_handle;
-  int status;
-
-  STARTUPINFOA siStartInfo;
-  BOOL retval = FALSE;
-
-  SECURITY_ATTRIBUTES saAttr;
-  char *joined_argv;
-
-  saAttr.nLength = sizeof(SECURITY_ATTRIBUTES);
-  saAttr.bInheritHandle = TRUE;
-  /* TODO: should we set explicit security attributes? (#2046, comment 5) */
-  saAttr.lpSecurityDescriptor = NULL;
-
-  /* Assume failure to start process */
-  status = PROCESS_STATUS_ERROR;
-
-  /* Set up pipe for stdout */
-  if (!CreatePipe(&stdout_pipe_read, &stdout_pipe_write, &saAttr, 0)) {
-    log_warn(LD_GENERAL,
-      "Failed to create pipe for stdout communication with child process: %s",
-      format_win32_error(GetLastError()));
-    return status;
-  }
-  if (!SetHandleInformation(stdout_pipe_read, HANDLE_FLAG_INHERIT, 0)) {
-    log_warn(LD_GENERAL,
-      "Failed to configure pipe for stdout communication with child "
-      "process: %s", format_win32_error(GetLastError()));
-    return status;
-  }
-
-  /* Set up pipe for stderr */
-  if (!CreatePipe(&stderr_pipe_read, &stderr_pipe_write, &saAttr, 0)) {
-    log_warn(LD_GENERAL,
-      "Failed to create pipe for stderr communication with child process: %s",
-      format_win32_error(GetLastError()));
-    return status;
-  }
-  if (!SetHandleInformation(stderr_pipe_read, HANDLE_FLAG_INHERIT, 0)) {
-    log_warn(LD_GENERAL,
-      "Failed to configure pipe for stderr communication with child "
-      "process: %s", format_win32_error(GetLastError()));
-    return status;
-  }
-
-  /* Set up pipe for stdin */
-  if (!CreatePipe(&stdin_pipe_read, &stdin_pipe_write, &saAttr, 0)) {
-    log_warn(LD_GENERAL,
-      "Failed to create pipe for stdin communication with child process: %s",
-      format_win32_error(GetLastError()));
-    return status;
-  }
-  if (!SetHandleInformation(stdin_pipe_write, HANDLE_FLAG_INHERIT, 0)) {
-    log_warn(LD_GENERAL,
-      "Failed to configure pipe for stdin communication with child "
-      "process: %s", format_win32_error(GetLastError()));
-    return status;
-  }
-
-  /* Create the child process */
-
-  /* Windows expects argv to be a whitespace delimited string, so join argv up
-   */
-  joined_argv = tor_join_win_cmdline(argv);
-
-  process_handle = process_handle_new();
-  process_handle->status = status;
-
-  ZeroMemory(&(process_handle->pid), sizeof(PROCESS_INFORMATION));
-  ZeroMemory(&siStartInfo, sizeof(STARTUPINFO));
-  siStartInfo.cb = sizeof(STARTUPINFO);
-  siStartInfo.hStdError = stderr_pipe_write;
-  siStartInfo.hStdOutput = stdout_pipe_write;
-  siStartInfo.hStdInput = stdin_pipe_read;
-  siStartInfo.dwFlags |= STARTF_USESTDHANDLES;
-
-  /* Create the child process */
-
-  retval = CreateProcessA(filename,      // module name
-                 joined_argv,   // command line
-  /* TODO: should we set explicit security attributes? (#2046, comment 5) */
-                 NULL,          // process security attributes
-                 NULL,          // primary thread security attributes
-                 TRUE,          // handles are inherited
-  /*(TODO: set CREATE_NEW CONSOLE/PROCESS_GROUP to make GetExitCodeProcess()
-   * work?) */
-                 CREATE_NO_WINDOW,             // creation flags
-                 (env==NULL) ? NULL : env->windows_environment_block,
-                 NULL,          // use parent's current directory
-                 &siStartInfo,  // STARTUPINFO pointer
-                 &(process_handle->pid));  // receives PROCESS_INFORMATION
-
-  tor_free(joined_argv);
-
-  if (!retval) {
-    log_warn(LD_GENERAL,
-      "Failed to create child process %s: %s", filename?filename:argv[0],
-      format_win32_error(GetLastError()));
-    tor_free(process_handle);
-  } else  {
-    /* TODO: Close hProcess and hThread in process_handle->pid? */
-    process_handle->stdout_pipe = stdout_pipe_read;
-    process_handle->stderr_pipe = stderr_pipe_read;
-    process_handle->stdin_pipe = stdin_pipe_write;
-    status = process_handle->status = PROCESS_STATUS_RUNNING;
-  }
-
-  /* TODO: Close pipes on exit */
-  *process_handle_out = process_handle;
-  return status;
-#else /* !(defined(_WIN32)) */
-  pid_t pid;
-  int stdout_pipe[2];
-  int stderr_pipe[2];
-  int stdin_pipe[2];
-  int fd, retval;
-  process_handle_t *process_handle;
-  int status;
-
-  const char *error_message = SPAWN_ERROR_MESSAGE;
-  size_t error_message_length;
-
-  /* Represents where in the process of spawning the program is;
-     this is used for printing out the error message */
-  unsigned char child_state = CHILD_STATE_INIT;
-
-  char hex_errno[HEX_ERRNO_SIZE + 2]; /* + 1 should be sufficient actually */
-
-  static int max_fd = -1;
-
-  status = PROCESS_STATUS_ERROR;
-
-  /* We do the strlen here because strlen() is not signal handler safe,
-     and we are not allowed to use unsafe functions between fork and exec */
-  error_message_length = strlen(error_message);
-
-  // child_state = CHILD_STATE_PIPE;
-
-  /* Set up pipe for redirecting stdout, stderr, and stdin of child */
-  retval = pipe(stdout_pipe);
-  if (-1 == retval) {
-    log_warn(LD_GENERAL,
-      "Failed to set up pipe for stdout communication with child process: %s",
-       strerror(errno));
-    return status;
-  }
-
-  retval = pipe(stderr_pipe);
-  if (-1 == retval) {
-    log_warn(LD_GENERAL,
-      "Failed to set up pipe for stderr communication with child process: %s",
-      strerror(errno));
-
-    close(stdout_pipe[0]);
-    close(stdout_pipe[1]);
-
-    return status;
-  }
-
-  retval = pipe(stdin_pipe);
-  if (-1 == retval) {
-    log_warn(LD_GENERAL,
-      "Failed to set up pipe for stdin communication with child process: %s",
-       strerror(errno));
-
-    close(stdout_pipe[0]);
-    close(stdout_pipe[1]);
-    close(stderr_pipe[0]);
-    close(stderr_pipe[1]);
-
-    return status;
-  }
-
-  // child_state = CHILD_STATE_MAXFD;
-
-#ifdef _SC_OPEN_MAX
-  if (-1 == max_fd) {
-    max_fd = (int) sysconf(_SC_OPEN_MAX);
-    if (max_fd == -1) {
-      max_fd = DEFAULT_MAX_FD;
-      log_warn(LD_GENERAL,
-               "Cannot find maximum file descriptor, assuming %d", max_fd);
-    }
-  }
-#else /* !(defined(_SC_OPEN_MAX)) */
-  max_fd = DEFAULT_MAX_FD;
-#endif /* defined(_SC_OPEN_MAX) */
-
-  // child_state = CHILD_STATE_FORK;
-
-  pid = fork();
-  if (0 == pid) {
-    /* In child */
-
-#if defined(HAVE_SYS_PRCTL_H) && defined(__linux__)
-    /* Attempt to have the kernel issue a SIGTERM if the parent
-     * goes away. Certain attributes of the binary being execve()ed
-     * will clear this during the execve() call, but it's better
-     * than nothing.
-     */
-    prctl(PR_SET_PDEATHSIG, SIGTERM);
-#endif /* defined(HAVE_SYS_PRCTL_H) && defined(__linux__) */
-
-    child_state = CHILD_STATE_DUPOUT;
-
-    /* Link child stdout to the write end of the pipe */
-    retval = dup2(stdout_pipe[1], STDOUT_FILENO);
-    if (-1 == retval)
-        goto error;
-
-    child_state = CHILD_STATE_DUPERR;
-
-    /* Link child stderr to the write end of the pipe */
-    retval = dup2(stderr_pipe[1], STDERR_FILENO);
-    if (-1 == retval)
-        goto error;
-
-    child_state = CHILD_STATE_DUPIN;
-
-    /* Link child stdin to the read end of the pipe */
-    retval = dup2(stdin_pipe[0], STDIN_FILENO);
-    if (-1 == retval)
-      goto error;
-
-    // child_state = CHILD_STATE_CLOSEFD;
-
-    close(stderr_pipe[0]);
-    close(stderr_pipe[1]);
-    close(stdout_pipe[0]);
-    close(stdout_pipe[1]);
-    close(stdin_pipe[0]);
-    close(stdin_pipe[1]);
-
-    /* Close all other fds, including the read end of the pipe */
-    /* XXX: We should now be doing enough FD_CLOEXEC setting to make
-     * this needless. */
-    for (fd = STDERR_FILENO + 1; fd < max_fd; fd++) {
-      close(fd);
-    }
-
-    // child_state = CHILD_STATE_EXEC;
-
-    /* Call the requested program. We need the cast because
-       execvp doesn't define argv as const, even though it
-       does not modify the arguments */
-    if (env)
-      execve(filename, (char *const *) argv, env->unixoid_environment_block);
-    else {
-      static char *new_env[] = { NULL };
-      execve(filename, (char *const *) argv, new_env);
-    }
-
-    /* If we got here, the exec or open(/dev/null) failed */
-
-    child_state = CHILD_STATE_FAILEXEC;
-
-  error:
-    {
-      /* XXX: are we leaking fds from the pipe? */
-      int n, err=0;
-      ssize_t nbytes;
-
-      n = format_helper_exit_status(child_state, errno, hex_errno);
-
-      if (n >= 0) {
-        /* Write the error message. GCC requires that we check the return
-           value, but there is nothing we can do if it fails */
-        /* TODO: Don't use STDOUT, use a pipe set up just for this purpose */
-        nbytes = write(STDOUT_FILENO, error_message, error_message_length);
-        err = (nbytes < 0);
-        nbytes = write(STDOUT_FILENO, hex_errno, n);
-        err += (nbytes < 0);
-      }
-
-      _exit(err?254:255); // exit ok: in child.
-    }
-
-    /* Never reached, but avoids compiler warning */
-    return status; // LCOV_EXCL_LINE
-  }
-
-  /* In parent */
-
-  if (-1 == pid) {
-    log_warn(LD_GENERAL, "Failed to fork child process: %s", strerror(errno));
-    close(stdin_pipe[0]);
-    close(stdin_pipe[1]);
-    close(stdout_pipe[0]);
-    close(stdout_pipe[1]);
-    close(stderr_pipe[0]);
-    close(stderr_pipe[1]);
-    return status;
-  }
-
-  process_handle = process_handle_new();
-  process_handle->status = status;
-  process_handle->pid = pid;
-
-  /* TODO: If the child process forked but failed to exec, waitpid it */
-
-  /* Return read end of the pipes to caller, and close write end */
-  process_handle->stdout_pipe = stdout_pipe[0];
-  retval = close(stdout_pipe[1]);
-
-  if (-1 == retval) {
-    log_warn(LD_GENERAL,
-            "Failed to close write end of stdout pipe in parent process: %s",
-            strerror(errno));
-  }
-
-  process_handle->waitpid_cb = set_waitpid_callback(pid,
-                                                    process_handle_waitpid_cb,
-                                                    process_handle);
-
-  process_handle->stderr_pipe = stderr_pipe[0];
-  retval = close(stderr_pipe[1]);
-
-  if (-1 == retval) {
-    log_warn(LD_GENERAL,
-            "Failed to close write end of stderr pipe in parent process: %s",
-            strerror(errno));
-  }
-
-  /* Return write end of the stdin pipe to caller, and close the read end */
-  process_handle->stdin_pipe = stdin_pipe[1];
-  retval = close(stdin_pipe[0]);
-
-  if (-1 == retval) {
-    log_warn(LD_GENERAL,
-            "Failed to close read end of stdin pipe in parent process: %s",
-            strerror(errno));
-  }
-
-  status = process_handle->status = PROCESS_STATUS_RUNNING;
-  /* Set stdin/stdout/stderr pipes to be non-blocking */
-  if (fcntl(process_handle->stdout_pipe, F_SETFL, O_NONBLOCK) < 0 ||
-      fcntl(process_handle->stderr_pipe, F_SETFL, O_NONBLOCK) < 0 ||
-      fcntl(process_handle->stdin_pipe, F_SETFL, O_NONBLOCK) < 0) {
-    log_warn(LD_GENERAL, "Failed to set stderror/stdout/stdin pipes "
-             "nonblocking in parent process: %s", strerror(errno));
-  }
-
-  *process_handle_out = process_handle;
-  return status;
-#endif /* defined(_WIN32) */
-}
-
-/** Destroy all resources allocated by the process handle in
- *  <b>process_handle</b>.
- *  If <b>also_terminate_process</b> is true, also terminate the
- *  process of the process handle. */
-MOCK_IMPL(void,
-tor_process_handle_destroy,(process_handle_t *process_handle,
-                            int also_terminate_process))
-{
-  if (!process_handle)
-    return;
-
-  if (also_terminate_process) {
-    if (tor_terminate_process(process_handle) < 0) {
-      const char *errstr =
-#ifdef _WIN32
-        format_win32_error(GetLastError());
-#else
-        strerror(errno);
-#endif
-      log_notice(LD_GENERAL, "Failed to terminate process with "
-                 "PID '%d' ('%s').", tor_process_get_pid(process_handle),
-                 errstr);
-    } else {
-      log_info(LD_GENERAL, "Terminated process with PID '%d'.",
-               tor_process_get_pid(process_handle));
-    }
-  }
-
-  process_handle->status = PROCESS_STATUS_NOTRUNNING;
-
-#ifdef _WIN32
-  if (process_handle->stdout_pipe)
-    CloseHandle(process_handle->stdout_pipe);
-
-  if (process_handle->stderr_pipe)
-    CloseHandle(process_handle->stderr_pipe);
-
-  if (process_handle->stdin_pipe)
-    CloseHandle(process_handle->stdin_pipe);
-#else /* !(defined(_WIN32)) */
-  close(process_handle->stdout_pipe);
-  close(process_handle->stderr_pipe);
-  close(process_handle->stdin_pipe);
-
-  clear_waitpid_callback(process_handle->waitpid_cb);
-#endif /* defined(_WIN32) */
-
-  memset(process_handle, 0x0f, sizeof(process_handle_t));
-  tor_free(process_handle);
-}
-
-/** Get the exit code of a process specified by <b>process_handle</b> and store
- * it in <b>exit_code</b>, if set to a non-NULL value.  If <b>block</b> is set
- * to true, the call will block until the process has exited.  Otherwise if
- * the process is still running, the function will return
- * PROCESS_EXIT_RUNNING, and exit_code will be left unchanged. Returns
- * PROCESS_EXIT_EXITED if the process did exit. If there is a failure,
- * PROCESS_EXIT_ERROR will be returned and the contents of exit_code (if
- * non-NULL) will be undefined. N.B. Under *nix operating systems, this will
- * probably not work in Tor, because waitpid() is called in main.c to reap any
- * terminated child processes.*/
-int
-tor_get_exit_code(process_handle_t *process_handle,
-                  int block, int *exit_code)
-{
-#ifdef _WIN32
-  DWORD retval;
-  BOOL success;
-
-  if (block) {
-    /* Wait for the process to exit */
-    retval = WaitForSingleObject(process_handle->pid.hProcess, INFINITE);
-    if (retval != WAIT_OBJECT_0) {
-      log_warn(LD_GENERAL, "WaitForSingleObject() failed (%d): %s",
-              (int)retval, format_win32_error(GetLastError()));
-      return PROCESS_EXIT_ERROR;
-    }
-  } else {
-    retval = WaitForSingleObject(process_handle->pid.hProcess, 0);
-    if (WAIT_TIMEOUT == retval) {
-      /* Process has not exited */
-      return PROCESS_EXIT_RUNNING;
-    } else if (retval != WAIT_OBJECT_0) {
-      log_warn(LD_GENERAL, "WaitForSingleObject() failed (%d): %s",
-               (int)retval, format_win32_error(GetLastError()));
-      return PROCESS_EXIT_ERROR;
-    }
-  }
-
-  if (exit_code != NULL) {
-    success = GetExitCodeProcess(process_handle->pid.hProcess,
-                                 (PDWORD)exit_code);
-    if (!success) {
-      log_warn(LD_GENERAL, "GetExitCodeProcess() failed: %s",
-               format_win32_error(GetLastError()));
-      return PROCESS_EXIT_ERROR;
-    }
-  }
-#else /* !(defined(_WIN32)) */
-  int stat_loc;
-  int retval;
-
-  if (process_handle->waitpid_cb) {
-    /* We haven't processed a SIGCHLD yet. */
-    retval = waitpid(process_handle->pid, &stat_loc, block?0:WNOHANG);
-    if (retval == process_handle->pid) {
-      clear_waitpid_callback(process_handle->waitpid_cb);
-      process_handle->waitpid_cb = NULL;
-      process_handle->waitpid_exit_status = stat_loc;
-    }
-  } else {
-    /* We already got a SIGCHLD for this process, and handled it. */
-    retval = process_handle->pid;
-    stat_loc = process_handle->waitpid_exit_status;
-  }
-
-  if (!block && 0 == retval) {
-    /* Process has not exited */
-    return PROCESS_EXIT_RUNNING;
-  } else if (retval != process_handle->pid) {
-    log_warn(LD_GENERAL, "waitpid() failed for PID %d: %s",
-             (int)process_handle->pid, strerror(errno));
-    return PROCESS_EXIT_ERROR;
-  }
-
-  if (!WIFEXITED(stat_loc)) {
-    log_warn(LD_GENERAL, "Process %d did not exit normally",
-             (int)process_handle->pid);
-    return PROCESS_EXIT_ERROR;
-  }
-
-  if (exit_code != NULL)
-    *exit_code = WEXITSTATUS(stat_loc);
-#endif /* defined(_WIN32) */
-
-  return PROCESS_EXIT_EXITED;
-}
-
-#ifdef _WIN32
-/** Read from a handle <b>h</b> into <b>buf</b>, up to <b>count</b> bytes.  If
- * <b>hProcess</b> is NULL, the function will return immediately if there is
- * nothing more to read. Otherwise <b>hProcess</b> should be set to the handle
- * to the process owning the <b>h</b>. In this case, the function will exit
- * only once the process has exited, or <b>count</b> bytes are read. Returns
- * the number of bytes read, or -1 on error. */
-ssize_t
-tor_read_all_handle(HANDLE h, char *buf, size_t count,
-                    const process_handle_t *process)
-{
-  size_t numread = 0;
-  BOOL retval;
-  DWORD byte_count;
-  BOOL process_exited = FALSE;
-
-  if (count > SIZE_T_CEILING || count > SSIZE_MAX)
-    return -1;
-
-  while (numread < count) {
-    /* Check if there is anything to read */
-    retval = PeekNamedPipe(h, NULL, 0, NULL, &byte_count, NULL);
-    if (!retval) {
-      log_warn(LD_GENERAL,
-        "Failed to peek from handle: %s",
-        format_win32_error(GetLastError()));
-      return -1;
-    } else if (0 == byte_count) {
-      /* Nothing available: process exited or it is busy */
-
-      /* Exit if we don't know whether the process is running */
-      if (NULL == process)
-        break;
-
-      /* The process exited and there's nothing left to read from it */
-      if (process_exited)
-        break;
-
-      /* If process is not running, check for output one more time in case
-         it wrote something after the peek was performed. Otherwise keep on
-         waiting for output */
-      tor_assert(process != NULL);
-      byte_count = WaitForSingleObject(process->pid.hProcess, 0);
-      if (WAIT_TIMEOUT != byte_count)
-        process_exited = TRUE;
-
-      continue;
-    }
-
-    /* There is data to read; read it */
-    retval = ReadFile(h, buf+numread, count-numread, &byte_count, NULL);
-    tor_assert(byte_count + numread <= count);
-    if (!retval) {
-      log_warn(LD_GENERAL, "Failed to read from handle: %s",
-        format_win32_error(GetLastError()));
-      return -1;
-    } else if (0 == byte_count) {
-      /* End of file */
-      break;
-    }
-    numread += byte_count;
-  }
-  return (ssize_t)numread;
-}
-#else /* !(defined(_WIN32)) */
-/** Read from a handle <b>fd</b> into <b>buf</b>, up to <b>count</b> bytes.  If
- * <b>process</b> is NULL, the function will return immediately if there is
- * nothing more to read. Otherwise data will be read until end of file, or
- * <b>count</b> bytes are read.  Returns the number of bytes read, or -1 on
- * error. Sets <b>eof</b> to true if <b>eof</b> is not NULL and the end of the
- * file has been reached. */
-ssize_t
-tor_read_all_handle(int fd, char *buf, size_t count,
-                    const process_handle_t *process,
-                    int *eof)
-{
-  size_t numread = 0;
-  ssize_t result;
-
-  if (eof)
-    *eof = 0;
-
-  if (count > SIZE_T_CEILING || count > SSIZE_MAX)
-    return -1;
-
-  while (numread < count) {
-    result = read(fd, buf+numread, count-numread);
-
-    if (result == 0) {
-      log_debug(LD_GENERAL, "read() reached end of file");
-      if (eof)
-        *eof = 1;
-      break;
-    } else if (result < 0 && errno == EAGAIN) {
-      if (process)
-        continue;
-      else
-        break;
-    } else if (result < 0) {
-      log_warn(LD_GENERAL, "read() failed: %s", strerror(errno));
-      return -1;
-    }
-
-    numread += result;
-  }
-
-  log_debug(LD_GENERAL, "read() read %d bytes from handle", (int)numread);
-  return (ssize_t)numread;
-}
-#endif /* defined(_WIN32) */
-
-/** Read from stdout of a process until the process exits. */
-ssize_t
-tor_read_all_from_process_stdout(const process_handle_t *process_handle,
-                                 char *buf, size_t count)
-{
-#ifdef _WIN32
-  return tor_read_all_handle(process_handle->stdout_pipe, buf, count,
-                             process_handle);
-#else
-  return tor_read_all_handle(process_handle->stdout_pipe, buf, count,
-                             process_handle, NULL);
-#endif /* defined(_WIN32) */
-}
-
-/** Read from stdout of a process until the process exits. */
-ssize_t
-tor_read_all_from_process_stderr(const process_handle_t *process_handle,
-                                 char *buf, size_t count)
-{
-#ifdef _WIN32
-  return tor_read_all_handle(process_handle->stderr_pipe, buf, count,
-                             process_handle);
-#else
-  return tor_read_all_handle(process_handle->stderr_pipe, buf, count,
-                             process_handle, NULL);
-#endif /* defined(_WIN32) */
-}
-
-/** Return a string corresponding to <b>stream_status</b>. */
-const char *
-stream_status_to_string(enum stream_status stream_status)
-{
-  switch (stream_status) {
-    case IO_STREAM_OKAY:
-      return "okay";
-    case IO_STREAM_EAGAIN:
-      return "temporarily unavailable";
-    case IO_STREAM_TERM:
-      return "terminated";
-    case IO_STREAM_CLOSED:
-      return "closed";
-    default:
-      tor_fragile_assert();
-      return "unknown";
-  }
-}
-
-/** Split buf into lines, and add to smartlist. The buffer <b>buf</b> will be
- * modified. The resulting smartlist will consist of pointers to buf, so there
- * is no need to free the contents of sl. <b>buf</b> must be a NUL-terminated
- * string. <b>len</b> should be set to the length of the buffer excluding the
- * NUL. Non-printable characters (including NUL) will be replaced with "." */
-int
-tor_split_lines(smartlist_t *sl, char *buf, int len)
-{
-  /* Index in buf of the start of the current line */
-  int start = 0;
-  /* Index in buf of the current character being processed */
-  int cur = 0;
-  /* Are we currently in a line */
-  char in_line = 0;
-
-  /* Loop over string */
-  while (cur < len) {
-    /* Loop until end of line or end of string */
-    for (; cur < len; cur++) {
-      if (in_line) {
-        if ('\r' == buf[cur] || '\n' == buf[cur]) {
-          /* End of line */
-          buf[cur] = '\0';
-          /* Point cur to the next line */
-          cur++;
-          /* Line starts at start and ends with a nul */
-          break;
-        } else {
-          if (!TOR_ISPRINT(buf[cur]))
-            buf[cur] = '.';
-        }
-      } else {
-        if ('\r' == buf[cur] || '\n' == buf[cur]) {
-          /* Skip leading vertical space */
-          ;
-        } else {
-          in_line = 1;
-          start = cur;
-          if (!TOR_ISPRINT(buf[cur]))
-            buf[cur] = '.';
-        }
-      }
-    }
-    /* We are at the end of the line or end of string. If in_line is true there
-     * is a line which starts at buf+start and ends at a NUL. cur points to
-     * the character after the NUL. */
-    if (in_line)
-      smartlist_add(sl, (void *)(buf+start));
-    in_line = 0;
-  }
-  return smartlist_len(sl);
-}
-
-#ifdef _WIN32
-
-/** Return a smartlist containing lines outputted from
- *  <b>handle</b>. Return NULL on error, and set
- *  <b>stream_status_out</b> appropriately. */
-MOCK_IMPL(smartlist_t *,
-tor_get_lines_from_handle, (HANDLE *handle,
-                            enum stream_status *stream_status_out))
-{
-  int pos;
-  char stdout_buf[600] = {0};
-  smartlist_t *lines = NULL;
-
-  tor_assert(stream_status_out);
-
-  *stream_status_out = IO_STREAM_TERM;
-
-  pos = tor_read_all_handle(handle, stdout_buf, sizeof(stdout_buf) - 1, NULL);
-  if (pos < 0) {
-    *stream_status_out = IO_STREAM_TERM;
-    return NULL;
-  }
-  if (pos == 0) {
-    *stream_status_out = IO_STREAM_EAGAIN;
-    return NULL;
-  }
-
-  /* End with a null even if there isn't a \r\n at the end */
-  /* TODO: What if this is a partial line? */
-  stdout_buf[pos] = '\0';
-
-  /* Split up the buffer */
-  lines = smartlist_new();
-  tor_split_lines(lines, stdout_buf, pos);
-
-  /* Currently 'lines' is populated with strings residing on the
-     stack. Replace them with their exact copies on the heap: */
-  SMARTLIST_FOREACH(lines, char *, line,
-                    SMARTLIST_REPLACE_CURRENT(lines, line, tor_strdup(line)));
-
-  *stream_status_out = IO_STREAM_OKAY;
-
-  return lines;
-}
-
-#else /* !(defined(_WIN32)) */
-
-/** Return a smartlist containing lines outputted from
- *  <b>fd</b>. Return NULL on error, and set
- *  <b>stream_status_out</b> appropriately. */
-MOCK_IMPL(smartlist_t *,
-tor_get_lines_from_handle, (int fd, enum stream_status *stream_status_out))
-{
-  enum stream_status stream_status;
-  char stdout_buf[400];
-  smartlist_t *lines = NULL;
-
-  while (1) {
-    memset(stdout_buf, 0, sizeof(stdout_buf));
-
-    stream_status = get_string_from_pipe(fd,
-                                         stdout_buf, sizeof(stdout_buf) - 1);
-    if (stream_status != IO_STREAM_OKAY)
-      goto done;
-
-    if (!lines) lines = smartlist_new();
-    smartlist_split_string(lines, stdout_buf, "\n", 0, 0);
-  }
-
- done:
-  *stream_status_out = stream_status;
-  return lines;
-}
-
-#endif /* defined(_WIN32) */
-
-/** Reads from <b>fd</b> and stores input in <b>buf_out</b> making
- *  sure it's below <b>count</b> bytes.
- *  If the string has a trailing newline, we strip it off.
- *
- * This function is specifically created to handle input from managed
- * proxies, according to the pluggable transports spec. Make sure it
- * fits your needs before using it.
- *
- * Returns:
- * IO_STREAM_CLOSED: If the stream is closed.
- * IO_STREAM_EAGAIN: If there is nothing to read and we should check back
- *  later.
- * IO_STREAM_TERM: If something is wrong with the stream.
- * IO_STREAM_OKAY: If everything went okay and we got a string
- *  in <b>buf_out</b>. */
-enum stream_status
-get_string_from_pipe(int fd, char *buf_out, size_t count)
-{
-  ssize_t ret;
-
-  tor_assert(count <= INT_MAX);
-
-  ret = read(fd, buf_out, count);
-
-  if (ret == 0)
-    return IO_STREAM_CLOSED;
-  else if (ret < 0 && errno == EAGAIN)
-    return IO_STREAM_EAGAIN;
-  else if (ret < 0)
-    return IO_STREAM_TERM;
-
-  if (buf_out[ret - 1] == '\n') {
-    /* Remove the trailing newline */
-    buf_out[ret - 1] = '\0';
-  } else
-    buf_out[ret] = '\0';
-
-  return IO_STREAM_OKAY;
-}
diff --git a/src/lib/process/subprocess.h b/src/lib/process/subprocess.h
index 5b4318ef2b..eb91626343 100644
--- a/src/lib/process/subprocess.h
+++ b/src/lib/process/subprocess.h
@@ -11,124 +11,10 @@
 #ifndef TOR_SUBPROCESS_H
 #define TOR_SUBPROCESS_H
 
-#include "lib/cc/torint.h"
-#include "lib/testsupport/testsupport.h"
-#include <stddef.h>
-#ifdef _WIN32
-#include <windows.h>
-#endif
-
-struct smartlist_t;
-
 void tor_disable_spawning_background_processes(void);
 
-typedef struct process_handle_t process_handle_t;
-struct process_environment_t;
-int tor_spawn_background(const char *const filename, const char **argv,
-                         struct process_environment_t *env,
-                         process_handle_t **process_handle_out);
-
-#define SPAWN_ERROR_MESSAGE "ERR: Failed to spawn background process - code "
-
-/** Status of an I/O stream. */
-enum stream_status {
-  IO_STREAM_OKAY,
-  IO_STREAM_EAGAIN,
-  IO_STREAM_TERM,
-  IO_STREAM_CLOSED
-};
-
-const char *stream_status_to_string(enum stream_status stream_status);
-
-enum stream_status get_string_from_pipe(int fd, char *buf, size_t count);
-
-/* Values of process_handle_t.status. */
-#define PROCESS_STATUS_NOTRUNNING 0
-#define PROCESS_STATUS_RUNNING 1
-#define PROCESS_STATUS_ERROR -1
-
-#ifdef SUBPROCESS_PRIVATE
-struct waitpid_callback_t;
-
-/** Structure to represent the state of a process with which Tor is
- * communicating. The contents of this structure are private to util.c */
-struct process_handle_t {
-  /** One of the PROCESS_STATUS_* values */
-  int status;
-#ifdef _WIN32
-  HANDLE stdin_pipe;
-  HANDLE stdout_pipe;
-  HANDLE stderr_pipe;
-  PROCESS_INFORMATION pid;
-#else /* !(defined(_WIN32)) */
-  int stdin_pipe;
-  int stdout_pipe;
-  int stderr_pipe;
-  pid_t pid;
-  /** If the process has not given us a SIGCHLD yet, this has the
-   * waitpid_callback_t that gets invoked once it has. Otherwise this
-   * contains NULL. */
-  struct waitpid_callback_t *waitpid_cb;
-  /** The exit status reported by waitpid. */
-  int waitpid_exit_status;
-#endif /* defined(_WIN32) */
-};
-#endif /* defined(SUBPROCESS_PRIVATE) */
-
-/* Return values of tor_get_exit_code() */
-#define PROCESS_EXIT_RUNNING 1
-#define PROCESS_EXIT_EXITED 0
-#define PROCESS_EXIT_ERROR -1
-int tor_get_exit_code(process_handle_t *process_handle,
-                      int block, int *exit_code);
-int tor_split_lines(struct smartlist_t *sl, char *buf, int len);
-#ifdef _WIN32
-ssize_t tor_read_all_handle(HANDLE h, char *buf, size_t count,
-                            const process_handle_t *process);
-#else
-ssize_t tor_read_all_handle(int fd, char *buf, size_t count,
-                            const process_handle_t *process,
-                            int *eof);
-#endif /* defined(_WIN32) */
-ssize_t tor_read_all_from_process_stdout(
-    const process_handle_t *process_handle, char *buf, size_t count);
-ssize_t tor_read_all_from_process_stderr(
-    const process_handle_t *process_handle, char *buf, size_t count);
+#ifndef _WIN32
 char *tor_join_win_cmdline(const char *argv[]);
-
-int tor_process_get_pid(process_handle_t *process_handle);
-#ifdef _WIN32
-HANDLE tor_process_get_stdout_pipe(process_handle_t *process_handle);
-#else
-int tor_process_get_stdout_pipe(process_handle_t *process_handle);
 #endif
 
-#ifdef _WIN32
-MOCK_DECL(struct smartlist_t *, tor_get_lines_from_handle,(HANDLE *handle,
-                           enum stream_status *stream_status));
-#else
-MOCK_DECL(struct smartlist_t *, tor_get_lines_from_handle,(int fd,
-                                       enum stream_status *stream_status));
-#endif /* defined(_WIN32) */
-
-int tor_terminate_process(process_handle_t *process_handle);
-
-MOCK_DECL(void, tor_process_handle_destroy,(process_handle_t *process_handle,
-                                            int also_terminate_process));
-
-#ifdef SUBPROCESS_PRIVATE
-/* Prototypes for private functions only used by util.c (and unit tests) */
-
-#ifndef _WIN32
-STATIC int format_helper_exit_status(unsigned char child_state,
-                              int saved_errno, char *hex_errno);
-
-/* Space for hex values of child state, a slash, saved_errno (with
-   leading minus) and newline (no null) */
-#define HEX_ERRNO_SIZE (sizeof(char) * 2 + 1 + \
-                        1 + sizeof(int) * 2 + 1)
-#endif /* !defined(_WIN32) */
-
-#endif /* defined(SUBPROCESS_PRIVATE) */
-
 #endif
diff --git a/src/test/Makefile.nmake b/src/test/Makefile.nmake
index cfbe281b94..aa16a22b52 100644
--- a/src/test/Makefile.nmake
+++ b/src/test/Makefile.nmake
@@ -1,4 +1,4 @@
-all: test.exe test-child.exe bench.exe
+all: test.exe bench.exe
 
 CFLAGS = /I ..\win32 /I ..\..\..\build-alpha\include /I ..\common /I ..\or \
     /I ..\ext
@@ -30,8 +30,5 @@ test.exe: $(TEST_OBJECTS)
 bench.exe: bench.obj
 	$(CC) $(CFLAGS) bench.obj $(LIBS) ..\common\*.lib /Fe$@
 
-test-child.exe: test-child.obj
-	$(CC) $(CFLAGS) test-child.obj /Fe$@
-
 clean:
-	del *.obj *.lib test.exe bench.exe test-child.exe
+	del *.obj *.lib test.exe bench.exe
diff --git a/src/test/include.am b/src/test/include.am
index 9df2fd481d..e1f55e5d03 100644
--- a/src/test/include.am
+++ b/src/test/include.am
@@ -65,7 +65,6 @@ noinst_PROGRAMS+= \
 	src/test/test \
 	src/test/test-slow \
 	src/test/test-memwipe \
-	src/test/test-child \
 	src/test/test-process \
 	src/test/test_workqueue \
 	src/test/test-switch-id \
@@ -204,7 +203,6 @@ src_test_test_slow_SOURCES += \
 	src/test/test_slow.c \
 	src/test/test_crypto_slow.c \
 	src/test/test_process_slow.c \
-	src/test/test_util_slow.c \
 	src/test/testing_common.c \
 	src/test/testing_rsakeys.c \
 	src/ext/tinytest.c
diff --git a/src/test/test-child.c b/src/test/test-child.c
deleted file mode 100644
index 14df1a9b76..0000000000
--- a/src/test/test-child.c
+++ /dev/null
@@ -1,61 +0,0 @@
-/* Copyright (c) 2011-2018, The Tor Project, Inc. */
-/* See LICENSE for licensing information */
-
-#include "orconfig.h"
-#include <stdio.h>
-#ifdef _WIN32
-#define WINDOWS_LEAN_AND_MEAN
-#include <windows.h>
-#else
-#include <unistd.h>
-#endif /* defined(_WIN32) */
-#include <string.h>
-
-#ifdef _WIN32
-#define SLEEP(sec) Sleep((sec)*1000)
-#else
-#define SLEEP(sec) sleep(sec)
-#endif
-
-/** Trivial test program which prints out its command line arguments so we can
- * check if tor_spawn_background() works */
-int
-main(int argc, char **argv)
-{
-  int i;
-  int delay = 1;
-  int fast = 0;
-
-  if (argc > 1)  {
-    if (!strcmp(argv[1], "--hang")) {
-      delay = 60;
-    } else if (!strcmp(argv[1], "--fast")) {
-      fast = 1;
-      delay = 0;
-    }
-  }
-
-  fprintf(stdout, "OUT\n");
-  fprintf(stderr, "ERR\n");
-  for (i = 1; i < argc; i++)
-    fprintf(stdout, "%s\n", argv[i]);
-  if (!fast)
-    fprintf(stdout, "SLEEPING\n");
-  /* We need to flush stdout so that test_util_spawn_background_partial_read()
-     succeed. Otherwise ReadFile() will get the entire output in one */
-  // XXX: Can we make stdio flush on newline?
-  fflush(stdout);
-  if (!fast)
-    SLEEP(1);
-  fprintf(stdout, "DONE\n");
-  fflush(stdout);
-  if (fast)
-    return 0;
-
-  while (--delay) {
-    SLEEP(1);
-  }
-
-  return 0;
-}
-
diff --git a/src/test/test.h b/src/test/test.h
index 9f72623968..ce50fa89d9 100644
--- a/src/test/test.h
+++ b/src/test/test.h
@@ -271,7 +271,6 @@ extern struct testcase_t x509_tests[];
 
 extern struct testcase_t slow_crypto_tests[];
 extern struct testcase_t slow_process_tests[];
-extern struct testcase_t slow_util_tests[];
 
 extern struct testgroup_t testgroups[];
 
diff --git a/src/test/test_logging.c b/src/test/test_logging.c
index cd685a4af7..9d3ee5d55f 100644
--- a/src/test/test_logging.c
+++ b/src/test/test_logging.c
@@ -117,22 +117,27 @@ test_sigsafe_err(void *arg)
   content = read_file_to_str(fn, 0, NULL);
 
   tt_ptr_op(content, OP_NE, NULL);
-  tor_split_lines(lines, content, (int)strlen(content));
+  smartlist_split_string(lines, content, "\n", 0, 0);
   tt_int_op(smartlist_len(lines), OP_GE, 5);
 
-  if (strstr(smartlist_get(lines, 0), "opening new log file"))
+  if (strstr(smartlist_get(lines, 0), "opening new log file")) {
+    void *item = smartlist_get(lines, 0);
     smartlist_del_keeporder(lines, 0);
+    tor_free(item);
+  }
+
   tt_assert(strstr(smartlist_get(lines, 0), "Say, this isn't too cool"));
-  /* Next line is blank. */
-  tt_assert(!strcmpstart(smartlist_get(lines, 1), "=============="));
-  tt_assert(!strcmpstart(smartlist_get(lines, 2), "Minimal."));
-  /* Next line is blank. */
-  tt_assert(!strcmpstart(smartlist_get(lines, 3), "=============="));
-  tt_str_op(smartlist_get(lines, 4), OP_EQ,
+  tt_str_op(smartlist_get(lines, 1), OP_EQ, "");
+  tt_assert(!strcmpstart(smartlist_get(lines, 2), "=============="));
+  tt_assert(!strcmpstart(smartlist_get(lines, 3), "Minimal."));
+  tt_str_op(smartlist_get(lines, 4), OP_EQ, "");
+  tt_assert(!strcmpstart(smartlist_get(lines, 5), "=============="));
+  tt_str_op(smartlist_get(lines, 6), OP_EQ,
             "Testing any attempt to manually log from a signal.");
 
  done:
   tor_free(content);
+  SMARTLIST_FOREACH(lines, char *, x, tor_free(x));
   smartlist_free(lines);
 }
 
diff --git a/src/test/test_slow.c b/src/test/test_slow.c
index 0c66eff930..97c2912af6 100644
--- a/src/test/test_slow.c
+++ b/src/test/test_slow.c
@@ -21,7 +21,6 @@
 struct testgroup_t testgroups[] = {
   { "slow/crypto/", slow_crypto_tests },
   { "slow/process/", slow_process_tests },
-  { "slow/util/", slow_util_tests },
   END_OF_GROUPS
 };
 
diff --git a/src/test/test_util.c b/src/test/test_util.c
index bcface64fd..4fa67b6419 100644
--- a/src/test/test_util.c
+++ b/src/test/test_util.c
@@ -4301,204 +4301,6 @@ test_util_load_win_lib(void *ptr)
 }
 #endif /* defined(_WIN32) */
 
-#ifndef _WIN32
-static void
-clear_hex_errno(char *hex_errno)
-{
-  memset(hex_errno, '\0', HEX_ERRNO_SIZE + 1);
-}
-
-static void
-test_util_exit_status(void *ptr)
-{
-  /* Leave an extra byte for a \0 so we can do string comparison */
-  char hex_errno[HEX_ERRNO_SIZE + 1];
-  int n;
-
-  (void)ptr;
-
-  clear_hex_errno(hex_errno);
-  tt_str_op("",OP_EQ, hex_errno);
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0, 0, hex_errno);
-  tt_str_op("0/0\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-
-#if SIZEOF_INT == 4
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0, 0x7FFFFFFF, hex_errno);
-  tt_str_op("0/7FFFFFFF\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0xFF, -0x80000000, hex_errno);
-  tt_str_op("FF/-80000000\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-  tt_int_op(n,OP_EQ, HEX_ERRNO_SIZE);
-
-#elif SIZEOF_INT == 8
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0, 0x7FFFFFFFFFFFFFFF, hex_errno);
-  tt_str_op("0/7FFFFFFFFFFFFFFF\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0xFF, -0x8000000000000000, hex_errno);
-  tt_str_op("FF/-8000000000000000\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-  tt_int_op(n,OP_EQ, HEX_ERRNO_SIZE);
-
-#endif /* SIZEOF_INT == 4 || ... */
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0x7F, 0, hex_errno);
-  tt_str_op("7F/0\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-
-  clear_hex_errno(hex_errno);
-  n = format_helper_exit_status(0x08, -0x242, hex_errno);
-  tt_str_op("8/-242\n",OP_EQ, hex_errno);
-  tt_int_op(n,OP_EQ, strlen(hex_errno));
-
-  clear_hex_errno(hex_errno);
-  tt_str_op("",OP_EQ, hex_errno);
-
- done:
-  ;
-}
-#endif /* !defined(_WIN32) */
-
-#ifndef _WIN32
-static void
-test_util_string_from_pipe(void *ptr)
-{
-  int test_pipe[2] = {-1, -1};
-  int retval = 0;
-  enum stream_status status = IO_STREAM_TERM;
-  ssize_t retlen;
-  char buf[4] = { 0 };
-
-  (void)ptr;
-
-  errno = 0;
-
-  /* Set up a pipe to test on */
-  retval = pipe(test_pipe);
-  tt_int_op(retval, OP_EQ, 0);
-
-  /* Send in a string. */
-  retlen = write(test_pipe[1], "ABC", 3);
-  tt_int_op(retlen, OP_EQ, 3);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "ABC");
-  errno = 0;
-
-  /* Send in a string that contains a nul. */
-  retlen = write(test_pipe[1], "AB\0", 3);
-  tt_int_op(retlen, OP_EQ, 3);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "AB");
-  errno = 0;
-
-  /* Send in a string that contains a nul only. */
-  retlen = write(test_pipe[1], "\0", 1);
-  tt_int_op(retlen, OP_EQ, 1);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "");
-  errno = 0;
-
-  /* Send in a string that contains a trailing newline. */
-  retlen = write(test_pipe[1], "AB\n", 3);
-  tt_int_op(retlen, OP_EQ, 3);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "AB");
-  errno = 0;
-
-  /* Send in a string that contains a newline only. */
-  retlen = write(test_pipe[1], "\n", 1);
-  tt_int_op(retlen, OP_EQ, 1);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "");
-  errno = 0;
-
-  /* Send in a string and check that we nul terminate return values. */
-  retlen = write(test_pipe[1], "AAA", 3);
-  tt_int_op(retlen, OP_EQ, 3);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "AAA");
-  tt_mem_op(buf, OP_EQ, "AAA\0", sizeof(buf));
-  errno = 0;
-
-  retlen = write(test_pipe[1], "B", 1);
-  tt_int_op(retlen, OP_EQ, 1);
-
-  memset(buf, '\xff', sizeof(buf));
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "B");
-  tt_mem_op(buf, OP_EQ, "B\0\xff\xff", sizeof(buf));
-  errno = 0;
-
-  /* Send in multiple lines. */
-  retlen = write(test_pipe[1], "A\nB", 3);
-  tt_int_op(retlen, OP_EQ, 3);
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "A\nB");
-  errno = 0;
-
-  /* Send in a line and close */
-  retlen = write(test_pipe[1], "AB", 2);
-  tt_int_op(retlen, OP_EQ, 2);
-  retval = close(test_pipe[1]);
-  tt_int_op(retval, OP_EQ, 0);
-  test_pipe[1] = -1;
-
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_OKAY);
-  tt_str_op(buf, OP_EQ, "AB");
-  errno = 0;
-
-  /* Check for EOF */
-  status = get_string_from_pipe(test_pipe[0], buf, sizeof(buf)-1);
-  tt_int_op(errno, OP_EQ, 0);
-  tt_int_op(status, OP_EQ, IO_STREAM_CLOSED);
-  errno = 0;
-
- done:
-  if (test_pipe[0] != -1)
-    close(test_pipe[0]);
-  if (test_pipe[1] != -1)
-    close(test_pipe[1]);
-}
-
-#endif /* !defined(_WIN32) */
-
 /**
  * Test for format_hex_number_sigsafe()
  */
@@ -4651,67 +4453,6 @@ struct split_lines_test_t {
   const char *split_line[MAX_SPLIT_LINE_COUNT]; // Split lines
 };
 
-/**
- * Test that we properly split a buffer into lines
- */
-static void
-test_util_split_lines(void *ptr)
-{
-  /* Test cases. orig_line of last test case must be NULL.
-   * The last element of split_line[i] must be NULL. */
-  struct split_lines_test_t tests[] = {
-    {"", 0, {NULL}},
-    {"foo", 3, {"foo", NULL}},
-    {"\n\rfoo\n\rbar\r\n", 12, {"foo", "bar", NULL}},
-    {"fo o\r\nb\tar", 10, {"fo o", "b.ar", NULL}},
-    {"\x0f""f\0o\0\n\x01""b\0r\0\r", 12, {".f.o.", ".b.r.", NULL}},
-    {"line 1\r\nline 2", 14, {"line 1", "line 2", NULL}},
-    {"line 1\r\n\r\nline 2", 16, {"line 1", "line 2", NULL}},
-    {"line 1\r\n\r\r\r\nline 2", 18, {"line 1", "line 2", NULL}},
-    {"line 1\r\n\n\n\n\rline 2", 18, {"line 1", "line 2", NULL}},
-    {"line 1\r\n\r\t\r\nline 3", 18, {"line 1", ".", "line 3", NULL}},
-    {"\n\t\r\t\nline 3", 11, {".", ".", "line 3", NULL}},
-    {NULL, 0, { NULL }}
-  };
-
-  int i, j;
-  char *orig_line=NULL;
-  smartlist_t *sl=NULL;
-
-  (void)ptr;
-
-  for (i=0; tests[i].orig_line; i++) {
-    sl = smartlist_new();
-    /* Allocate space for string and trailing NULL */
-    orig_line = tor_memdup(tests[i].orig_line, tests[i].orig_length + 1);
-    tor_split_lines(sl, orig_line, tests[i].orig_length);
-
-    j = 0;
-    log_info(LD_GENERAL, "Splitting test %d of length %d",
-             i, tests[i].orig_length);
-    SMARTLIST_FOREACH_BEGIN(sl, const char *, line) {
-      /* Check we have not got too many lines */
-      tt_int_op(MAX_SPLIT_LINE_COUNT, OP_GT, j);
-      /* Check that there actually should be a line here */
-      tt_ptr_op(tests[i].split_line[j], OP_NE, NULL);
-      log_info(LD_GENERAL, "Line %d of test %d, should be <%s>",
-               j, i, tests[i].split_line[j]);
-      /* Check that the line is as expected */
-      tt_str_op(line,OP_EQ, tests[i].split_line[j]);
-      j++;
-    } SMARTLIST_FOREACH_END(line);
-    /* Check that we didn't miss some lines */
-    tt_ptr_op(NULL,OP_EQ, tests[i].split_line[j]);
-    tor_free(orig_line);
-    smartlist_free(sl);
-    sl = NULL;
-  }
-
- done:
-  tor_free(orig_line);
-  smartlist_free(sl);
-}
-
 static void
 test_util_di_ops(void *arg)
 {
@@ -6483,12 +6224,9 @@ struct testcase_t util_tests[] = {
   UTIL_TEST(nowrap_math, 0),
   UTIL_TEST(num_cpus, 0),
   UTIL_TEST_WIN_ONLY(load_win_lib, 0),
-  UTIL_TEST_NO_WIN(exit_status, 0),
-  UTIL_TEST_NO_WIN(string_from_pipe, 0),
   UTIL_TEST(format_hex_number, 0),
   UTIL_TEST(format_dec_number, 0),
   UTIL_TEST(join_win_cmdline, 0),
-  UTIL_TEST(split_lines, 0),
   UTIL_TEST(n_bits_set, 0),
   UTIL_TEST(eat_whitespace, 0),
   UTIL_TEST(sl_new_from_text_lines, 0),
diff --git a/src/test/test_util_slow.c b/src/test/test_util_slow.c
deleted file mode 100644
index c7b3e3e2a4..0000000000
--- a/src/test/test_util_slow.c
+++ /dev/null
@@ -1,396 +0,0 @@
-/* Copyright (c) 2001-2004, Roger Dingledine.
- * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
- * Copyright (c) 2007-2018, The Tor Project, Inc. */
-/* See LICENSE for licensing information */
-
-#include "orconfig.h"
-#define UTIL_PRIVATE
-#define SUBPROCESS_PRIVATE
-#include "lib/crypt_ops/crypto_cipher.h"
-#include "lib/log/log.h"
-#include "lib/process/subprocess.h"
-#include "lib/process/waitpid.h"
-#include "lib/string/printf.h"
-#include "lib/time/compat_time.h"
-#include "test/test.h"
-
-#include <errno.h>
-#include <string.h>
-
-#ifndef BUILDDIR
-#define BUILDDIR "."
-#endif
-
-#ifdef _WIN32
-#define notify_pending_waitpid_callbacks() STMT_NIL
-#define TEST_CHILD "test-child.exe"
-#define EOL "\r\n"
-#else
-#define TEST_CHILD (BUILDDIR "/src/test/test-child")
-#define EOL "\n"
-#endif /* defined(_WIN32) */
-
-#ifdef _WIN32
-/* I've assumed Windows doesn't have the gap between fork and exec
- * that causes the race condition on unix-like platforms */
-#define MATCH_PROCESS_STATUS(s1,s2)         ((s1) == (s2))
-
-#else /* !(defined(_WIN32)) */
-/* work around a race condition of the timing of SIGCHLD handler updates
- * to the process_handle's fields, and checks of those fields
- *
- * TODO: Once we can signal failure to exec, change PROCESS_STATUS_RUNNING to
- * PROCESS_STATUS_ERROR (and similarly with *_OR_NOTRUNNING) */
-#define PROCESS_STATUS_RUNNING_OR_NOTRUNNING  (PROCESS_STATUS_RUNNING+1)
-#define IS_RUNNING_OR_NOTRUNNING(s)           \
-  ((s) == PROCESS_STATUS_RUNNING || (s) == PROCESS_STATUS_NOTRUNNING)
-/* well, this is ugly */
-#define MATCH_PROCESS_STATUS(s1,s2)           \
-  (  (s1) == (s2)                                         \
-     ||((s1) == PROCESS_STATUS_RUNNING_OR_NOTRUNNING      \
-        && IS_RUNNING_OR_NOTRUNNING(s2))                  \
-     ||((s2) == PROCESS_STATUS_RUNNING_OR_NOTRUNNING      \
-        && IS_RUNNING_OR_NOTRUNNING(s1)))
-
-#endif /* defined(_WIN32) */
-
-/** Helper function for testing tor_spawn_background */
-static void
-run_util_spawn_background(const char *argv[], const char *expected_out,
-                          const char *expected_err, int expected_exit,
-                          int expected_status)
-{
-  int retval, exit_code;
-  ssize_t pos;
-  process_handle_t *process_handle=NULL;
-  char stdout_buf[100], stderr_buf[100];
-  int status;
-
-  /* Start the program */
-#ifdef _WIN32
-  status = tor_spawn_background(NULL, argv, NULL, &process_handle);
-#else
-  status = tor_spawn_background(argv[0], argv, NULL, &process_handle);
-#endif
-
-  notify_pending_waitpid_callbacks();
-
-  /* the race condition doesn't affect status,
-   * because status isn't updated by the SIGCHLD handler,
-   * but we still need to handle PROCESS_STATUS_RUNNING_OR_NOTRUNNING */
-  tt_assert(MATCH_PROCESS_STATUS(expected_status, status));
-  if (status == PROCESS_STATUS_ERROR) {
-    tt_ptr_op(process_handle, OP_EQ, NULL);
-    return;
-  }
-
-  tt_ptr_op(process_handle, OP_NE, NULL);
-
-  /* When a spawned process forks, fails, then exits very quickly,
-   * (this typically occurs when exec fails)
-   * there is a race condition between the SIGCHLD handler
-   * updating the process_handle's fields, and this test
-   * checking the process status in those fields.
-   * The SIGCHLD update can occur before or after the code below executes.
-   * This causes intermittent failures in spawn_background_fail(),
-   * typically when the machine is under load.
-   * We use PROCESS_STATUS_RUNNING_OR_NOTRUNNING to avoid this issue. */
-
-  /* the race condition affects the change in
-   * process_handle->status from RUNNING to NOTRUNNING */
-  tt_assert(MATCH_PROCESS_STATUS(expected_status, process_handle->status));
-
-#ifndef _WIN32
-  notify_pending_waitpid_callbacks();
-  /* the race condition affects the change in
-   * process_handle->waitpid_cb to NULL,
-   * so we skip the check if expected_status is ambiguous,
-   * that is, PROCESS_STATUS_RUNNING_OR_NOTRUNNING */
-  tt_assert(process_handle->waitpid_cb != NULL
-              || expected_status == PROCESS_STATUS_RUNNING_OR_NOTRUNNING);
-#endif /* !defined(_WIN32) */
-
-#ifdef _WIN32
-  tt_assert(process_handle->stdout_pipe != INVALID_HANDLE_VALUE);
-  tt_assert(process_handle->stderr_pipe != INVALID_HANDLE_VALUE);
-  tt_assert(process_handle->stdin_pipe != INVALID_HANDLE_VALUE);
-#else
-  tt_assert(process_handle->stdout_pipe >= 0);
-  tt_assert(process_handle->stderr_pipe >= 0);
-  tt_assert(process_handle->stdin_pipe >= 0);
-#endif /* defined(_WIN32) */
-
-  /* Check stdout */
-  pos = tor_read_all_from_process_stdout(process_handle, stdout_buf,
-                                         sizeof(stdout_buf) - 1);
-  tt_assert(pos >= 0);
-  stdout_buf[pos] = '\0';
-  tt_int_op(strlen(expected_out),OP_EQ, pos);
-  tt_str_op(expected_out,OP_EQ, stdout_buf);
-
-  notify_pending_waitpid_callbacks();
-
-  /* Check it terminated correctly */
-  retval = tor_get_exit_code(process_handle, 1, &exit_code);
-  tt_int_op(PROCESS_EXIT_EXITED,OP_EQ, retval);
-  tt_int_op(expected_exit,OP_EQ, exit_code);
-  // TODO: Make test-child exit with something other than 0
-
-#ifndef _WIN32
-  notify_pending_waitpid_callbacks();
-  tt_ptr_op(process_handle->waitpid_cb, OP_EQ, NULL);
-#endif
-
-  /* Check stderr */
-  pos = tor_read_all_from_process_stderr(process_handle, stderr_buf,
-                                         sizeof(stderr_buf) - 1);
-  tt_assert(pos >= 0);
-  stderr_buf[pos] = '\0';
-  tt_str_op(expected_err,OP_EQ, stderr_buf);
-  tt_int_op(strlen(expected_err),OP_EQ, pos);
-
-  notify_pending_waitpid_callbacks();
-
- done:
-  if (process_handle)
-    tor_process_handle_destroy(process_handle, 1);
-}
-
-/** Check that we can launch a process and read the output */
-static void
-test_util_spawn_background_ok(void *ptr)
-{
-  const char *argv[] = {TEST_CHILD, "--test", NULL};
-  const char *expected_out = "OUT"EOL "--test"EOL "SLEEPING"EOL "DONE" EOL;
-  const char *expected_err = "ERR"EOL;
-
-  (void)ptr;
-
-  run_util_spawn_background(argv, expected_out, expected_err, 0,
-      PROCESS_STATUS_RUNNING);
-}
-
-/** Check that failing to find the executable works as expected */
-static void
-test_util_spawn_background_fail(void *ptr)
-{
-  const char *argv[] = {BUILDDIR "/src/test/no-such-file", "--test", NULL};
-  const char *expected_err = "";
-  char expected_out[1024];
-  char code[32];
-#ifdef _WIN32
-  const int expected_status = PROCESS_STATUS_ERROR;
-#else
-  /* TODO: Once we can signal failure to exec, set this to be
-   * PROCESS_STATUS_RUNNING_OR_ERROR */
-  const int expected_status = PROCESS_STATUS_RUNNING_OR_NOTRUNNING;
-#endif /* defined(_WIN32) */
-
-  memset(expected_out, 0xf0, sizeof(expected_out));
-  memset(code, 0xf0, sizeof(code));
-
-  (void)ptr;
-
-  tor_snprintf(code, sizeof(code), "%x/%x",
-    9 /* CHILD_STATE_FAILEXEC */ , ENOENT);
-  tor_snprintf(expected_out, sizeof(expected_out),
-    "ERR: Failed to spawn background process - code %s\n", code);
-
-  run_util_spawn_background(argv, expected_out, expected_err, 255,
-      expected_status);
-}
-
-/** Test that reading from a handle returns a partial read rather than
- * blocking */
-static void
-test_util_spawn_background_partial_read_impl(int exit_early)
-{
-  const int expected_exit = 0;
-  const int expected_status = PROCESS_STATUS_RUNNING;
-
-  int retval, exit_code;
-  ssize_t pos = -1;
-  process_handle_t *process_handle=NULL;
-  int status;
-  char stdout_buf[100], stderr_buf[100];
-
-  const char *argv[] = {TEST_CHILD, "--test", NULL};
-  const char *expected_out[] = { "OUT" EOL "--test" EOL "SLEEPING" EOL,
-                                 "DONE" EOL,
-                                 NULL };
-  const char *expected_err = "ERR" EOL;
-
-#ifndef _WIN32
-  int eof = 0;
-#endif
-  int expected_out_ctr;
-
-  if (exit_early) {
-    argv[1] = "--hang";
-    expected_out[0] = "OUT"EOL "--hang"EOL "SLEEPING" EOL;
-  }
-
-  /* Start the program */
-#ifdef _WIN32
-  status = tor_spawn_background(NULL, argv, NULL, &process_handle);
-#else
-  status = tor_spawn_background(argv[0], argv, NULL, &process_handle);
-#endif
-  tt_int_op(expected_status,OP_EQ, status);
-  tt_assert(process_handle);
-  tt_int_op(expected_status,OP_EQ, process_handle->status);
-
-  /* Check stdout */
-  for (expected_out_ctr = 0; expected_out[expected_out_ctr] != NULL;) {
-#ifdef _WIN32
-    pos = tor_read_all_handle(process_handle->stdout_pipe, stdout_buf,
-                              sizeof(stdout_buf) - 1, NULL);
-#else
-    /* Check that we didn't read the end of file last time */
-    tt_assert(!eof);
-    pos = tor_read_all_handle(process_handle->stdout_pipe, stdout_buf,
-                              sizeof(stdout_buf) - 1, NULL, &eof);
-#endif /* defined(_WIN32) */
-    log_info(LD_GENERAL, "tor_read_all_handle() returned %d", (int)pos);
-
-    /* We would have blocked, keep on trying */
-    if (0 == pos)
-      continue;
-
-    tt_assert(pos > 0);
-    stdout_buf[pos] = '\0';
-    tt_str_op(expected_out[expected_out_ctr],OP_EQ, stdout_buf);
-    tt_int_op(strlen(expected_out[expected_out_ctr]),OP_EQ, pos);
-    expected_out_ctr++;
-  }
-
-  if (exit_early) {
-    tor_process_handle_destroy(process_handle, 1);
-    process_handle = NULL;
-    goto done;
-  }
-
-  /* The process should have exited without writing more */
-#ifdef _WIN32
-  pos = tor_read_all_handle(process_handle->stdout_pipe, stdout_buf,
-                            sizeof(stdout_buf) - 1,
-                            process_handle);
-  tt_int_op(0,OP_EQ, pos);
-#else /* !(defined(_WIN32)) */
-  if (!eof) {
-    /* We should have got all the data, but maybe not the EOF flag */
-    pos = tor_read_all_handle(process_handle->stdout_pipe, stdout_buf,
-                              sizeof(stdout_buf) - 1,
-                              process_handle, &eof);
-    tt_int_op(0,OP_EQ, pos);
-    tt_assert(eof);
-  }
-  /* Otherwise, we got the EOF on the last read */
-#endif /* defined(_WIN32) */
-
-  /* Check it terminated correctly */
-  retval = tor_get_exit_code(process_handle, 1, &exit_code);
-  tt_int_op(PROCESS_EXIT_EXITED,OP_EQ, retval);
-  tt_int_op(expected_exit,OP_EQ, exit_code);
-
-  // TODO: Make test-child exit with something other than 0
-
-  /* Check stderr */
-  pos = tor_read_all_from_process_stderr(process_handle, stderr_buf,
-                                         sizeof(stderr_buf) - 1);
-  tt_assert(pos >= 0);
-  stderr_buf[pos] = '\0';
-  tt_str_op(expected_err,OP_EQ, stderr_buf);
-  tt_int_op(strlen(expected_err),OP_EQ, pos);
-
- done:
-  tor_process_handle_destroy(process_handle, 1);
-}
-
-static void
-test_util_spawn_background_partial_read(void *arg)
-{
-  (void)arg;
-  test_util_spawn_background_partial_read_impl(0);
-}
-
-static void
-test_util_spawn_background_exit_early(void *arg)
-{
-  (void)arg;
-  test_util_spawn_background_partial_read_impl(1);
-}
-
-static void
-test_util_spawn_background_waitpid_notify(void *arg)
-{
-  int retval, exit_code;
-  process_handle_t *process_handle=NULL;
-  int status;
-  int ms_timer;
-
-  const char *argv[] = {TEST_CHILD, "--fast", NULL};
-
-  (void) arg;
-
-#ifdef _WIN32
-  status = tor_spawn_background(NULL, argv, NULL, &process_handle);
-#else
-  status = tor_spawn_background(argv[0], argv, NULL, &process_handle);
-#endif
-
-  tt_int_op(status, OP_EQ, PROCESS_STATUS_RUNNING);
-  tt_ptr_op(process_handle, OP_NE, NULL);
-
-  /* We're not going to look at the stdout/stderr output this time. Instead,
-   * we're testing whether notify_pending_waitpid_calbacks() can report the
-   * process exit (on unix) and/or whether tor_get_exit_code() can notice it
-   * (on windows) */
-
-#ifndef _WIN32
-  ms_timer = 30*1000;
-  tt_ptr_op(process_handle->waitpid_cb, OP_NE, NULL);
-  while (process_handle->waitpid_cb && ms_timer > 0) {
-    tor_sleep_msec(100);
-    ms_timer -= 100;
-    notify_pending_waitpid_callbacks();
-  }
-  tt_int_op(ms_timer, OP_GT, 0);
-  tt_ptr_op(process_handle->waitpid_cb, OP_EQ, NULL);
-#endif /* !defined(_WIN32) */
-
-  ms_timer = 30*1000;
-  while (((retval = tor_get_exit_code(process_handle, 0, &exit_code))
-                == PROCESS_EXIT_RUNNING) && ms_timer > 0) {
-    tor_sleep_msec(100);
-    ms_timer -= 100;
-  }
-  tt_int_op(ms_timer, OP_GT, 0);
-
-  tt_int_op(retval, OP_EQ, PROCESS_EXIT_EXITED);
-
- done:
-  tor_process_handle_destroy(process_handle, 1);
-}
-
-#undef TEST_CHILD
-#undef EOL
-
-#undef MATCH_PROCESS_STATUS
-
-#ifndef _WIN32
-#undef PROCESS_STATUS_RUNNING_OR_NOTRUNNING
-#undef IS_RUNNING_OR_NOTRUNNING
-#endif
-
-#define UTIL_TEST(name, flags)                          \
-  { #name, test_util_ ## name, flags, NULL, NULL }
-
-struct testcase_t slow_util_tests[] = {
-  UTIL_TEST(spawn_background_ok, 0),
-  UTIL_TEST(spawn_background_fail, 0),
-  UTIL_TEST(spawn_background_partial_read, 0),
-  UTIL_TEST(spawn_background_exit_early, 0),
-  UTIL_TEST(spawn_background_waitpid_notify, 0),
-  END_OF_TESTCASES
-};