src/bin/lttng-relayd/utils.cpp

   1 /*
   2  * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
   3  * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
   4  *
   5  * SPDX-License-Identifier: GPL-2.0-only
   6  *
   7  */
   8
   9 #define _LGPL_SOURCE
  10 #include "lttng-relayd.hpp"
  11 #include "utils.hpp"
  12
  13 #include <common/common.hpp>
  14 #include <common/defaults.hpp>
  15 #include <common/path.hpp>
  16 #include <common/utils.hpp>
  17
  18 #include <stdio.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 static char *create_output_path_auto(const char *path_name)
  23 {
  24         int ret;
  25         char *traces_path = nullptr;
  26         const char *default_path;
  27
  28         default_path = utils_get_home_dir();
  29         if (default_path == nullptr) {
  30                 ERR("Home path not found.\n \
  31                                 Please specify an output path using -o, --output PATH");
  32                 goto exit;
  33         }
  34         ret = asprintf(&traces_path, "%s/" DEFAULT_TRACE_DIR_NAME "/%s", default_path, path_name);
  35         if (ret < 0) {
  36                 PERROR("asprintf trace dir name");
  37                 goto exit;
  38         }
  39 exit:
  40         return traces_path;
  41 }
  42
  43 static char *create_output_path_noauto(const char *path_name)
  44 {
  45         int ret;
  46         char *traces_path = nullptr;
  47         char *full_path;
  48
  49         full_path = utils_expand_path(opt_output_path);
  50         if (!full_path) {
  51                 goto exit;
  52         }
  53
  54         ret = asprintf(&traces_path, "%s/%s", full_path, path_name);
  55         if (ret < 0) {
  56                 PERROR("asprintf trace dir name");
  57                 goto exit;
  58         }
  59 exit:
  60         free(full_path);
  61         return traces_path;
  62 }
  63
  64 /*
  65  * Create the output trace directory path name string.
  66  *
  67  * Return the allocated string containing the path name or else NULL.
  68  */
  69 char *create_output_path(const char *path_name)
  70 {
  71         LTTNG_ASSERT(path_name);
  72
  73         if (opt_output_path == nullptr) {
  74                 return create_output_path_auto(path_name);
  75         } else {
  76                 return create_output_path_noauto(path_name);
  77         }
  78 }