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 #ifndef _GNU_SOURCE
  13 #define _GNU_SOURCE
  14 #endif
  15
  16 #include <unistd.h>
  17 #include <fcntl.h>
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20
  21 #include <common/pipe.hpp>
  22 #include <common/error.hpp>
  23
  24 int lttng_opt_verbose;
  25 int lttng_opt_mi;
  26 int lttng_opt_quiet;
  27
  28 int main(void)
  29 {
  30         int ret;
  31         /*
  32          * The event notifier pipes are not "special"; they are created using
  33          * the lttng_pipe utility. Hence, this should be representative of a
  34          * pipe created by the session daemon for event notifier messages to
  35          * go through.
  36          */
  37         struct lttng_pipe *pipe = lttng_pipe_open(0);
  38
  39         if (!pipe) {
  40                 /* lttng_pipe_open already logs on error. */
  41                 ret = EXIT_FAILURE;
  42                 goto end;
  43         }
  44
  45         ret = fcntl(lttng_pipe_get_writefd(pipe), F_GETPIPE_SZ);
  46         if (ret < 0) {
  47                 PERROR("Failed to get the size of the pipe");
  48                 ret = EXIT_FAILURE;
  49                 goto end;
  50         }
  51
  52         printf("%d\n", ret);
  53         ret = EXIT_SUCCESS;
  54 end:
  55         lttng_pipe_destroy(pipe);
  56         return ret;
  57 }