src/bin/lttng-relayd/utils.c

   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 <assert.h>
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14
  15 #include <common/common.h>
  16 #include <common/defaults.h>
  17 #include <common/utils.h>
  18
  19 #include "lttng-relayd.h"
  20 #include "utils.h"
  21
  22 static char *create_output_path_auto(const char *path_name)
  23 {
  24         int ret;
  25         char *traces_path = NULL;
  26         const char *default_path;
  27
  28         default_path = utils_get_home_dir();
  29         if (default_path == NULL) {
  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
  35                         "/%s", default_path, path_name);
  36         if (ret < 0) {
  37                 PERROR("asprintf trace dir name");
  38                 goto exit;
  39         }
  40 exit:
  41         return traces_path;
  42 }
  43
  44 static char *create_output_path_noauto(const char *path_name)
  45 {
  46         int ret;
  47         char *traces_path = NULL;
  48         char *full_path;
  49
  50         full_path = utils_expand_path(opt_output_path);
  51         if (!full_path) {
  52                 goto exit;
  53         }
  54
  55         ret = asprintf(&traces_path, "%s/%s", full_path, path_name);
  56         if (ret < 0) {
  57                 PERROR("asprintf trace dir name");
  58                 goto exit;
  59         }
  60 exit:
  61         free(full_path);
  62         return traces_path;
  63 }
  64
  65 /*
  66  * Create the output trace directory path name string.
  67  *
  68  * Return the allocated string containing the path name or else NULL.
  69  */
  70 char *create_output_path(const char *path_name)
  71 {
  72         assert(path_name);
  73
  74         if (opt_output_path == NULL) {
  75                 return create_output_path_auto(path_name);
  76         } else {
  77                 return create_output_path_noauto(path_name);
  78         }
  79 }