Commit | Line | Data |
---|---|---|
1501a7f3 JG |
1 | /* |
2 | * Copyright (C) 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <assert.h> | |
20 | #include <config.h> | |
21 | #include <ctype.h> | |
22 | #include <errno.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | ||
27 | #include <common/defaults.h> | |
28 | #include <common/error.h> | |
29 | #include <common/macros.h> | |
30 | #include <common/utils.h> | |
31 | ||
32 | #include "config.h" | |
33 | ||
34 | struct handler_filter_args { | |
35 | const char* section; | |
36 | config_entry_handler_cb handler; | |
37 | void *user_data; | |
38 | }; | |
39 | ||
40 | const char * const config_str_yes = "yes"; | |
41 | const char * const config_str_true = "true"; | |
42 | const char * const config_str_on = "on"; | |
43 | const char * const config_str_no = "no"; | |
44 | const char * const config_str_false = "false"; | |
45 | const char * const config_str_off = "off"; | |
46 | ||
47 | static int config_entry_handler_filter(struct handler_filter_args *args, | |
48 | const char *section, const char *name, const char *value) | |
49 | { | |
50 | int ret = 0; | |
51 | struct config_entry entry = { section, name, value }; | |
52 | ||
53 | assert(args); | |
54 | ||
55 | if (!section || !name || !value) { | |
56 | ret = -EIO; | |
57 | goto end; | |
58 | } | |
59 | ||
60 | if (args->section) { | |
61 | if (strcmp(args->section, section)) { | |
62 | goto end; | |
63 | } | |
64 | } | |
65 | ||
66 | ret = args->handler(&entry, args->user_data); | |
67 | end: | |
68 | return ret; | |
69 | } | |
70 | ||
71 | LTTNG_HIDDEN | |
72 | int config_get_section_entries(const char *override_path, const char *section, | |
73 | config_entry_handler_cb handler, void *user_data) | |
74 | { | |
75 | int ret = 0; | |
76 | FILE *config_file = NULL; | |
77 | struct handler_filter_args filter = { section, handler, user_data }; | |
78 | ||
79 | if (override_path) { | |
80 | config_file = fopen(override_path, "r"); | |
81 | if (config_file) { | |
82 | DBG("Loaded daemon configuration file at %s", | |
83 | override_path); | |
84 | } else { | |
85 | ERR("Failed to open daemon configuration file at %s", | |
86 | override_path); | |
87 | ret = -ENOENT; | |
88 | goto end; | |
89 | } | |
90 | } else { | |
91 | char *path = utils_get_home_dir(); | |
92 | ||
93 | /* Try to open the user's daemon configuration file */ | |
94 | if (path) { | |
95 | ret = asprintf(&path, DEFAULT_DAEMON_HOME_CONFIGPATH, path); | |
96 | if (ret < 0) { | |
97 | goto end; | |
98 | } | |
99 | ||
100 | ret = 0; | |
101 | config_file = fopen(path, "r"); | |
102 | if (config_file) { | |
103 | DBG("Loaded daemon configuration file at %s", path); | |
104 | } | |
105 | ||
106 | free(path); | |
107 | } | |
108 | ||
109 | /* Try to open the system daemon configuration file */ | |
110 | if (!config_file) { | |
111 | config_file = fopen(DEFAULT_DAEMON_HOME_CONFIGPATH, "r"); | |
112 | } | |
113 | } | |
114 | ||
115 | if (!config_file) { | |
116 | DBG("No daemon configuration file found."); | |
117 | goto end; | |
118 | } | |
119 | ||
120 | ret = ini_parse_file(config_file, | |
121 | (ini_entry_handler) config_entry_handler_filter, (void *) &filter); | |
122 | ||
123 | end: | |
124 | return ret; | |
125 | } | |
126 | ||
127 | LTTNG_HIDDEN | |
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 = 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 | } |