Commit | Line | Data |
---|---|---|
3087ef18 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
3087ef18 DG |
7 | * |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
3087ef18 DG |
16 | */ |
17 | ||
6c1c0768 | 18 | #define _LGPL_SOURCE |
3087ef18 DG |
19 | #include <popt.h> |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <sys/stat.h> | |
24 | #include <sys/types.h> | |
25 | #include <unistd.h> | |
ce91cd0b JRJ |
26 | #include <assert.h> |
27 | ||
28 | #include <common/mi-lttng.h> | |
3087ef18 | 29 | |
c399183f | 30 | #include "../command.h" |
3087ef18 DG |
31 | |
32 | static char *opt_session_name; | |
33 | ||
34 | enum { | |
35 | OPT_HELP = 1, | |
679b4943 | 36 | OPT_LIST_OPTIONS, |
3087ef18 DG |
37 | }; |
38 | ||
ce91cd0b JRJ |
39 | static struct mi_writer *writer; |
40 | ||
3087ef18 DG |
41 | static struct poptOption long_options[] = { |
42 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
43 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 44 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
3087ef18 DG |
45 | {0, 0, 0, 0, 0, 0, 0} |
46 | }; | |
47 | ||
ce91cd0b JRJ |
48 | /* |
49 | * Print the necessary mi for a session and name. | |
50 | */ | |
51 | static int mi_print(char *session_name) | |
52 | { | |
53 | int ret; | |
54 | ||
55 | assert(writer); | |
56 | assert(session_name); | |
57 | ||
58 | /* | |
59 | * Open a sessions element | |
60 | * This is purely for validation purpose | |
61 | */ | |
62 | ret = mi_lttng_sessions_open(writer); | |
63 | if (ret) { | |
64 | goto end; | |
65 | } | |
66 | ||
67 | /* Open a session element */ | |
68 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
69 | if (ret) { | |
70 | goto end; | |
71 | } | |
72 | ||
73 | /* Session name */ | |
74 | ret = mi_lttng_writer_write_element_string(writer , config_element_name, | |
75 | session_name); | |
76 | if (ret) { | |
77 | goto end; | |
78 | } | |
79 | ||
80 | /* Close session and sessions element */ | |
81 | ret = mi_lttng_close_multi_element(writer, 2); | |
82 | if (ret) { | |
83 | goto end; | |
84 | } | |
85 | end: | |
86 | return ret; | |
87 | } | |
88 | ||
3087ef18 DG |
89 | /* |
90 | * set_session | |
91 | */ | |
92 | static int set_session(void) | |
93 | { | |
94 | int ret = CMD_SUCCESS; | |
7f0c090d PPM |
95 | int count, i; |
96 | unsigned int session_found = 0; | |
97 | struct lttng_session *sessions; | |
3087ef18 | 98 | |
487b253b DG |
99 | if (opt_session_name && strlen(opt_session_name) > NAME_MAX) { |
100 | ERR("Session name too long. Length must be lower or equal to %d", | |
101 | NAME_MAX); | |
102 | ret = CMD_ERROR; | |
7f0c090d PPM |
103 | goto end; |
104 | } | |
105 | ||
106 | count = lttng_list_sessions(&sessions); | |
107 | if (count < 0) { | |
108 | ret = CMD_ERROR; | |
109 | ERR("%s", lttng_strerror(count)); | |
110 | goto end; | |
111 | } | |
112 | ||
113 | for (i = 0; i < count; i++) { | |
114 | if (strncmp(sessions[i].name, opt_session_name, NAME_MAX) == 0) { | |
115 | session_found = 1; | |
116 | break; | |
117 | } | |
118 | } | |
119 | ||
120 | if (!session_found) { | |
121 | ERR("Session '%s' not found", opt_session_name); | |
122 | ret = CMD_ERROR; | |
487b253b DG |
123 | goto error; |
124 | } | |
125 | ||
fffd0547 | 126 | ret = config_init(opt_session_name); |
3087ef18 | 127 | if (ret < 0) { |
fffd0547 | 128 | ERR("Unable to set session name"); |
3087ef18 DG |
129 | ret = CMD_ERROR; |
130 | goto error; | |
131 | } | |
132 | ||
133 | MSG("Session set to %s", opt_session_name); | |
ce91cd0b JRJ |
134 | if (lttng_opt_mi) { |
135 | ret = mi_print(opt_session_name); | |
136 | if (ret) { | |
137 | ret = CMD_ERROR; | |
138 | goto error; | |
139 | } | |
140 | } | |
141 | ||
3087ef18 DG |
142 | ret = CMD_SUCCESS; |
143 | ||
144 | error: | |
7f0c090d PPM |
145 | free(sessions); |
146 | end: | |
3087ef18 DG |
147 | return ret; |
148 | } | |
149 | ||
150 | /* | |
151 | * cmd_set_session | |
152 | */ | |
153 | int cmd_set_session(int argc, const char **argv) | |
154 | { | |
ce91cd0b | 155 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
3087ef18 DG |
156 | static poptContext pc; |
157 | ||
158 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
159 | poptReadDefaultConfig(pc, 0); | |
160 | ||
161 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
162 | switch (opt) { | |
163 | case OPT_HELP: | |
4ba92f18 | 164 | SHOW_HELP(); |
3087ef18 | 165 | goto end; |
679b4943 SM |
166 | case OPT_LIST_OPTIONS: |
167 | list_cmd_options(stdout, long_options); | |
679b4943 | 168 | goto end; |
3087ef18 | 169 | default: |
3087ef18 DG |
170 | ret = CMD_UNDEFINED; |
171 | goto end; | |
172 | } | |
173 | } | |
174 | ||
175 | opt_session_name = (char *) poptGetArg(pc); | |
176 | if (opt_session_name == NULL) { | |
177 | ERR("Missing session name"); | |
ca1c3607 | 178 | ret = CMD_ERROR; |
3087ef18 DG |
179 | goto end; |
180 | } | |
181 | ||
ce91cd0b JRJ |
182 | /* Mi check */ |
183 | if (lttng_opt_mi) { | |
184 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
185 | if (!writer) { | |
186 | ret = -LTTNG_ERR_NOMEM; | |
187 | goto end; | |
188 | } | |
189 | ||
190 | /* Open command element */ | |
191 | ret = mi_lttng_writer_command_open(writer, | |
192 | mi_lttng_element_command_set_session); | |
193 | if (ret) { | |
194 | ret = CMD_ERROR; | |
195 | goto end; | |
196 | } | |
197 | ||
198 | /* Open output element */ | |
199 | ret = mi_lttng_writer_open_element(writer, | |
200 | mi_lttng_element_command_output); | |
201 | if (ret) { | |
202 | ret = CMD_ERROR; | |
203 | goto end; | |
204 | } | |
205 | } | |
206 | ||
207 | command_ret = set_session(); | |
208 | if (command_ret) { | |
209 | success = 0; | |
210 | } | |
211 | ||
212 | /* Mi closing */ | |
213 | if (lttng_opt_mi) { | |
214 | /* Close output element */ | |
215 | ret = mi_lttng_writer_close_element(writer); | |
216 | if (ret) { | |
217 | ret = CMD_ERROR; | |
218 | goto end; | |
219 | } | |
220 | ||
221 | /* Success ? */ | |
222 | ret = mi_lttng_writer_write_element_bool(writer, | |
223 | mi_lttng_element_command_success, success); | |
224 | if (ret) { | |
225 | ret = CMD_ERROR; | |
226 | goto end; | |
227 | } | |
228 | ||
229 | /* Command element close */ | |
230 | ret = mi_lttng_writer_command_close(writer); | |
231 | if (ret) { | |
232 | ret = CMD_ERROR; | |
233 | goto end; | |
234 | } | |
235 | } | |
3087ef18 DG |
236 | |
237 | end: | |
ce91cd0b JRJ |
238 | /* Mi clean-up */ |
239 | if (writer && mi_lttng_writer_destroy(writer)) { | |
240 | /* Preserve original error code */ | |
241 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
242 | } | |
243 | ||
244 | /* Overwrite ret if an error occured during set_session() */ | |
245 | ret = command_ret ? command_ret : ret; | |
246 | ||
ca1c3607 | 247 | poptFreeContext(pc); |
3087ef18 DG |
248 | return ret; |
249 | } |