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 #include <common/path.h>
  19
  20 #include "lttng-relayd.h"
  21 #include "utils.h"
  22
  23 static char *create_output_path_auto(const char *path_name)
  24 {
  25         int ret;
  26         char *traces_path = NULL;
  27         const char *default_path;
  28
  29         default_path = utils_get_home_dir();
  30         if (default_path == NULL) {
  31                 ERR("Home path not found.\n \
  32                                 Please specify an output path using -o, --output PATH");
  33                 goto exit;
  34         }
  35         ret = asprintf(&traces_path, "%s/" DEFAULT_TRACE_DIR_NAME
  36                         "/%s", default_path, path_name);
  37         if (ret < 0) {
  38                 PERROR("asprintf trace dir name");
  39                 goto exit;
  40         }
  41 exit:
  42         return traces_path;
  43 }
  44
  45 static char *create_output_path_noauto(const char *path_name)
  46 {
  47         int ret;
  48         char *traces_path = NULL;
  49         char *full_path;
  50
  51         full_path = utils_expand_path(opt_output_path);
  52         if (!full_path) {
  53                 goto exit;
  54         }
  55
  56         ret = asprintf(&traces_path, "%s/%s", full_path, path_name);
  57         if (ret < 0) {
  58                 PERROR("asprintf trace dir name");
  59                 goto exit;
  60         }
  61 exit:
  62         free(full_path);
  63         return traces_path;
  64 }
  65
  66 /*
  67  * Create the output trace directory path name string.
  68  *
  69  * Return the allocated string containing the path name or else NULL.
  70  */
  71 char *create_output_path(const char *path_name)
  72 {
  73         assert(path_name);
  74
  75         if (opt_output_path == NULL) {
  76                 return create_output_path_auto(path_name);
  77         } else {
  78                 return create_output_path_noauto(path_name);
  79         }
  80 }