Commit | Line | Data |
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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 | ||
4fc83d94 PP |
34 | #ifdef LTTNG_EMBED_HELP |
35 | static const char help_msg[] = | |
36 | #include <lttng-set-session.1.h> | |
37 | ; | |
38 | #endif | |
39 | ||
3087ef18 DG |
40 | enum { |
41 | OPT_HELP = 1, | |
679b4943 | 42 | OPT_LIST_OPTIONS, |
3087ef18 DG |
43 | }; |
44 | ||
ce91cd0b JRJ |
45 | static struct mi_writer *writer; |
46 | ||
3087ef18 DG |
47 | static struct poptOption long_options[] = { |
48 | /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */ | |
49 | {"help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0}, | |
679b4943 | 50 | {"list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, NULL, NULL}, |
3087ef18 DG |
51 | {0, 0, 0, 0, 0, 0, 0} |
52 | }; | |
53 | ||
ce91cd0b JRJ |
54 | /* |
55 | * Print the necessary mi for a session and name. | |
56 | */ | |
57 | static int mi_print(char *session_name) | |
58 | { | |
59 | int ret; | |
60 | ||
61 | assert(writer); | |
62 | assert(session_name); | |
63 | ||
64 | /* | |
65 | * Open a sessions element | |
66 | * This is purely for validation purpose | |
67 | */ | |
68 | ret = mi_lttng_sessions_open(writer); | |
69 | if (ret) { | |
70 | goto end; | |
71 | } | |
72 | ||
73 | /* Open a session element */ | |
74 | ret = mi_lttng_writer_open_element(writer, config_element_session); | |
75 | if (ret) { | |
76 | goto end; | |
77 | } | |
78 | ||
79 | /* Session name */ | |
80 | ret = mi_lttng_writer_write_element_string(writer , config_element_name, | |
81 | session_name); | |
82 | if (ret) { | |
83 | goto end; | |
84 | } | |
85 | ||
86 | /* Close session and sessions element */ | |
87 | ret = mi_lttng_close_multi_element(writer, 2); | |
88 | if (ret) { | |
89 | goto end; | |
90 | } | |
91 | end: | |
92 | return ret; | |
93 | } | |
94 | ||
3087ef18 DG |
95 | /* |
96 | * set_session | |
97 | */ | |
98 | static int set_session(void) | |
99 | { | |
100 | int ret = CMD_SUCCESS; | |
7f0c090d PPM |
101 | int count, i; |
102 | unsigned int session_found = 0; | |
103 | struct lttng_session *sessions; | |
3087ef18 | 104 | |
487b253b DG |
105 | if (opt_session_name && strlen(opt_session_name) > NAME_MAX) { |
106 | ERR("Session name too long. Length must be lower or equal to %d", | |
107 | NAME_MAX); | |
108 | ret = CMD_ERROR; | |
7f0c090d PPM |
109 | goto end; |
110 | } | |
111 | ||
112 | count = lttng_list_sessions(&sessions); | |
113 | if (count < 0) { | |
114 | ret = CMD_ERROR; | |
115 | ERR("%s", lttng_strerror(count)); | |
116 | goto end; | |
117 | } | |
118 | ||
119 | for (i = 0; i < count; i++) { | |
120 | if (strncmp(sessions[i].name, opt_session_name, NAME_MAX) == 0) { | |
121 | session_found = 1; | |
122 | break; | |
123 | } | |
124 | } | |
125 | ||
126 | if (!session_found) { | |
127 | ERR("Session '%s' not found", opt_session_name); | |
128 | ret = CMD_ERROR; | |
487b253b DG |
129 | goto error; |
130 | } | |
131 | ||
fffd0547 | 132 | ret = config_init(opt_session_name); |
3087ef18 | 133 | if (ret < 0) { |
fffd0547 | 134 | ERR("Unable to set session name"); |
3087ef18 DG |
135 | ret = CMD_ERROR; |
136 | goto error; | |
137 | } | |
138 | ||
139 | MSG("Session set to %s", opt_session_name); | |
ce91cd0b JRJ |
140 | if (lttng_opt_mi) { |
141 | ret = mi_print(opt_session_name); | |
142 | if (ret) { | |
143 | ret = CMD_ERROR; | |
144 | goto error; | |
145 | } | |
146 | } | |
147 | ||
3087ef18 DG |
148 | ret = CMD_SUCCESS; |
149 | ||
150 | error: | |
7f0c090d PPM |
151 | free(sessions); |
152 | end: | |
3087ef18 DG |
153 | return ret; |
154 | } | |
155 | ||
156 | /* | |
157 | * cmd_set_session | |
158 | */ | |
159 | int cmd_set_session(int argc, const char **argv) | |
160 | { | |
ce91cd0b | 161 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
3087ef18 DG |
162 | static poptContext pc; |
163 | ||
164 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
165 | poptReadDefaultConfig(pc, 0); | |
166 | ||
167 | while ((opt = poptGetNextOpt(pc)) != -1) { | |
168 | switch (opt) { | |
169 | case OPT_HELP: | |
4ba92f18 | 170 | SHOW_HELP(); |
3087ef18 | 171 | goto end; |
679b4943 SM |
172 | case OPT_LIST_OPTIONS: |
173 | list_cmd_options(stdout, long_options); | |
679b4943 | 174 | goto end; |
3087ef18 | 175 | default: |
3087ef18 DG |
176 | ret = CMD_UNDEFINED; |
177 | goto end; | |
178 | } | |
179 | } | |
180 | ||
181 | opt_session_name = (char *) poptGetArg(pc); | |
182 | if (opt_session_name == NULL) { | |
183 | ERR("Missing session name"); | |
ca1c3607 | 184 | ret = CMD_ERROR; |
3087ef18 DG |
185 | goto end; |
186 | } | |
187 | ||
ce91cd0b JRJ |
188 | /* Mi check */ |
189 | if (lttng_opt_mi) { | |
190 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
191 | if (!writer) { | |
192 | ret = -LTTNG_ERR_NOMEM; | |
193 | goto end; | |
194 | } | |
195 | ||
196 | /* Open command element */ | |
197 | ret = mi_lttng_writer_command_open(writer, | |
198 | mi_lttng_element_command_set_session); | |
199 | if (ret) { | |
200 | ret = CMD_ERROR; | |
201 | goto end; | |
202 | } | |
203 | ||
204 | /* Open output element */ | |
205 | ret = mi_lttng_writer_open_element(writer, | |
206 | mi_lttng_element_command_output); | |
207 | if (ret) { | |
208 | ret = CMD_ERROR; | |
209 | goto end; | |
210 | } | |
211 | } | |
212 | ||
213 | command_ret = set_session(); | |
214 | if (command_ret) { | |
215 | success = 0; | |
216 | } | |
217 | ||
218 | /* Mi closing */ | |
219 | if (lttng_opt_mi) { | |
220 | /* Close output element */ | |
221 | ret = mi_lttng_writer_close_element(writer); | |
222 | if (ret) { | |
223 | ret = CMD_ERROR; | |
224 | goto end; | |
225 | } | |
226 | ||
227 | /* Success ? */ | |
228 | ret = mi_lttng_writer_write_element_bool(writer, | |
229 | mi_lttng_element_command_success, success); | |
230 | if (ret) { | |
231 | ret = CMD_ERROR; | |
232 | goto end; | |
233 | } | |
234 | ||
235 | /* Command element close */ | |
236 | ret = mi_lttng_writer_command_close(writer); | |
237 | if (ret) { | |
238 | ret = CMD_ERROR; | |
239 | goto end; | |
240 | } | |
241 | } | |
3087ef18 DG |
242 | |
243 | end: | |
ce91cd0b JRJ |
244 | /* Mi clean-up */ |
245 | if (writer && mi_lttng_writer_destroy(writer)) { | |
246 | /* Preserve original error code */ | |
247 | ret = ret ? ret : LTTNG_ERR_MI_IO_FAIL; | |
248 | } | |
249 | ||
83f4233d | 250 | /* Overwrite ret if an error occurred during set_session() */ |
ce91cd0b JRJ |
251 | ret = command_ret ? command_ret : ret; |
252 | ||
ca1c3607 | 253 | poptFreeContext(pc); |
3087ef18 DG |
254 | return ret; |
255 | } |