Prepare for '-Wmissing-field-initializers'
[lttng-tools.git] / src / common / ini-config / ini-config.cpp
1 /*
2 * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
3 *
4 * SPDX-License-Identifier: GPL-2.0-only
5 *
6 */
7
8 #include "ini-config.h"
9
10 #include <common/defaults.h>
11 #include <common/error.h>
12 #include <common/ini-config/ini.h>
13 #include <common/macros.h>
14 #include <common/utils.h>
15 #include <ctype.h>
16
17 LTTNG_EXPORT const char *config_str_yes = "yes";
18 LTTNG_EXPORT const char *config_str_true = "true";
19 LTTNG_EXPORT const char *config_str_on = "on";
20 LTTNG_EXPORT const char *config_str_no = "no";
21 LTTNG_EXPORT const char *config_str_false = "false";
22 LTTNG_EXPORT const char *config_str_off = "off";
23
24 struct handler_filter_args {
25 const char* section;
26 config_entry_handler_cb handler;
27 void *user_data;
28 };
29
30 static int config_entry_handler_filter(struct handler_filter_args *args,
31 const char *section, const char *name, const char *value)
32 {
33 int ret = 0;
34 struct config_entry entry = { section, name, value };
35
36 LTTNG_ASSERT(args);
37
38 if (!section || !name || !value) {
39 ret = -EIO;
40 goto end;
41 }
42
43 if (args->section) {
44 if (strcmp(args->section, section)) {
45 goto end;
46 }
47 }
48
49 ret = args->handler(&entry, args->user_data);
50 end:
51 return ret;
52 }
53
54 int config_get_section_entries(const char *override_path, const char *section,
55 config_entry_handler_cb handler, void *user_data)
56 {
57 int ret = 0;
58 const char *path;
59 FILE *config_file = NULL;
60 struct handler_filter_args filter = { section, handler, user_data };
61
62 /* First, try system-wide conf. file. */
63 path = DEFAULT_DAEMON_SYSTEM_CONFIGPATH;
64
65 config_file = fopen(path, "r");
66 if (config_file) {
67 DBG("Loading daemon conf file at %s", path);
68 /*
69 * Return value is not very important here since error or not, we
70 * continue and try the next possible conf. file.
71 */
72 (void) ini_parse_file(config_file,
73 (ini_entry_handler) config_entry_handler_filter,
74 (void *) &filter);
75 fclose(config_file);
76 }
77
78 /* Second is the user local configuration. */
79 path = utils_get_home_dir();
80 if (path) {
81 char fullpath[PATH_MAX];
82
83 ret = snprintf(fullpath, sizeof(fullpath),
84 DEFAULT_DAEMON_HOME_CONFIGPATH, path);
85 if (ret < 0) {
86 PERROR("snprintf user conf. path");
87 goto error;
88 }
89
90 config_file = fopen(fullpath, "r");
91 if (config_file) {
92 DBG("Loading daemon user conf file at %s", path);
93 /*
94 * Return value is not very important here since error or not, we
95 * continue and try the next possible conf. file.
96 */
97 (void) ini_parse_file(config_file,
98 (ini_entry_handler) config_entry_handler_filter,
99 (void *) &filter);
100 fclose(config_file);
101 }
102 }
103
104 /* Final path is the one that the user might have provided. */
105 if (override_path) {
106 config_file = fopen(override_path, "r");
107 if (config_file) {
108 DBG("Loading daemon command line conf file at %s", override_path);
109 (void) ini_parse_file(config_file,
110 (ini_entry_handler) config_entry_handler_filter,
111 (void *) &filter);
112 fclose(config_file);
113 } else {
114 ERR("Failed to open daemon configuration file at %s",
115 override_path);
116 ret = -ENOENT;
117 goto error;
118 }
119 }
120
121 /* Everything went well. */
122 ret = 0;
123
124 error:
125 return ret;
126 }
127
128 int config_parse_value(const char *value)
129 {
130 int i, ret = 0;
131 char *endptr, *lower_str;
132 size_t len;
133 unsigned long v;
134
135 len = strlen(value);
136 if (!len) {
137 ret = -1;
138 goto end;
139 }
140
141 v = strtoul(value, &endptr, 10);
142 if (endptr != value) {
143 ret = v;
144 goto end;
145 }
146
147 lower_str = (char *) zmalloc(len + 1);
148 if (!lower_str) {
149 PERROR("zmalloc");
150 ret = -errno;
151 goto end;
152 }
153
154 for (i = 0; i < len; i++) {
155 lower_str[i] = tolower(value[i]);
156 }
157
158 if (!strcmp(lower_str, config_str_yes) ||
159 !strcmp(lower_str, config_str_true) ||
160 !strcmp(lower_str, config_str_on)) {
161 ret = 1;
162 } else if (!strcmp(lower_str, config_str_no) ||
163 !strcmp(lower_str, config_str_false) ||
164 !strcmp(lower_str, config_str_off)) {
165 ret = 0;
166 } else {
167 ret = -1;
168 }
169
170 free(lower_str);
171 end:
172 return ret;
173 }
This page took 0.03263 seconds and 4 git commands to generate.