tests/regression/tools/notification/default_pipe_size_getter.cpp

   1 /*
   2  * default_pipe_size_getter.c
   3  *
   4  * Tests suite for LTTng notification API (get default size of pipes)
   5  *
   6  * Copyright (C) 2021 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   7  *
   8  * SPDX-License-Identifier: MIT
   9  *
  10  */
  11
  12 #include <unistd.h>
  13 #include <fcntl.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16
  17 #include <common/pipe.hpp>
  18 #include <common/error.hpp>
  19
  20 int lttng_opt_verbose;
  21 int lttng_opt_mi;
  22 int lttng_opt_quiet;
  23
  24 int main(void)
  25 {
  26         int ret;
  27         /*
  28          * The event notifier pipes are not "special"; they are created using
  29          * the lttng_pipe utility. Hence, this should be representative of a
  30          * pipe created by the session daemon for event notifier messages to
  31          * go through.
  32          */
  33         struct lttng_pipe *pipe = lttng_pipe_open(0);
  34
  35         if (!pipe) {
  36                 /* lttng_pipe_open already logs on error. */
  37                 ret = EXIT_FAILURE;
  38                 goto end;
  39         }
  40
  41         ret = fcntl(lttng_pipe_get_writefd(pipe), F_GETPIPE_SZ);
  42         if (ret < 0) {
  43                 PERROR("Failed to get the size of the pipe");
  44                 ret = EXIT_FAILURE;
  45                 goto end;
  46         }
  47
  48         printf("%d\n", ret);
  49         ret = EXIT_SUCCESS;
  50 end:
  51         lttng_pipe_destroy(pipe);
  52         return ret;
  53 }