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93ec662e JD |
1 | /* |
2 | * Copyright (C) 2015 - Julien Desfossez <jdesfossez@efficios.com> | |
3 | * | |
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. | |
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 | * | |
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. | |
16 | */ | |
17 | ||
18 | #define _LGPL_SOURCE | |
19 | #include <assert.h> | |
20 | #include <ctype.h> | |
21 | #include <popt.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | ||
27 | #include <common/mi-lttng.h> | |
28 | ||
29 | #include "../command.h" | |
30 | ||
31 | static char *opt_session_name; | |
32 | static char *session_name = NULL; | |
33 | ||
34 | static int metadata_regenerate(int argc, const char **argv); | |
35 | ||
36 | enum { | |
37 | OPT_HELP = 1, | |
38 | OPT_LIST_OPTIONS, | |
39 | OPT_LIST_COMMANDS, | |
40 | }; | |
41 | ||
54897b57 JD |
42 | static struct mi_writer *writer; |
43 | ||
93ec662e JD |
44 | static struct poptOption long_options[] = { |
45 | /* { longName, shortName, argInfo, argPtr, value, descrip, argDesc, } */ | |
46 | { "help", 'h', POPT_ARG_NONE, 0, OPT_HELP, 0, 0, }, | |
47 | { "session", 's', POPT_ARG_STRING, &opt_session_name, 0, 0, 0}, | |
48 | { "list-options", 0, POPT_ARG_NONE, NULL, OPT_LIST_OPTIONS, 0, 0, }, | |
49 | { "list-commands", 0, POPT_ARG_NONE, NULL, OPT_LIST_COMMANDS}, | |
50 | { 0, 0, 0, 0, 0, 0, 0, }, | |
51 | }; | |
52 | ||
53 | static struct cmd_struct actions[] = { | |
54 | { "regenerate", metadata_regenerate }, | |
55 | { NULL, NULL } /* Array closure */ | |
56 | }; | |
57 | ||
93ec662e JD |
58 | /* |
59 | * Count and return the number of arguments in argv. | |
60 | */ | |
61 | static int count_arguments(const char **argv) | |
62 | { | |
63 | int i = 0; | |
64 | ||
65 | assert(argv); | |
66 | ||
67 | while (argv[i] != NULL) { | |
68 | i++; | |
69 | } | |
70 | ||
71 | return i; | |
72 | } | |
73 | ||
74 | static int metadata_regenerate(int argc, const char **argv) | |
75 | { | |
76 | int ret; | |
77 | ||
fb288d1e JD |
78 | if (argc > 1) { |
79 | ret = -LTTNG_ERR_INVALID; | |
80 | goto end; | |
81 | } | |
eded6438 | 82 | ret = lttng_regenerate_metadata(session_name); |
93ec662e JD |
83 | if (ret == 0) { |
84 | MSG("Metadata successfully regenerated for session %s", session_name); | |
85 | } | |
fb288d1e JD |
86 | |
87 | end: | |
93ec662e JD |
88 | return ret; |
89 | } | |
90 | ||
91 | static int handle_command(const char **argv) | |
92 | { | |
93 | struct cmd_struct *cmd; | |
94 | int ret = CMD_SUCCESS, i = 0, argc, command_ret = CMD_SUCCESS; | |
95 | ||
96 | if (argv == NULL) { | |
cfd1353e | 97 | ERR("argv is null"); |
93ec662e JD |
98 | command_ret = CMD_ERROR; |
99 | goto end; | |
100 | } | |
101 | ||
102 | argc = count_arguments(argv); | |
103 | ||
104 | cmd = &actions[i]; | |
105 | while (cmd->func != NULL) { | |
106 | /* Find command */ | |
107 | if (strcmp(argv[0], cmd->name) == 0) { | |
54897b57 JD |
108 | if (lttng_opt_mi) { |
109 | /* Action element */ | |
110 | ret = mi_lttng_writer_open_element(writer, | |
111 | mi_lttng_element_command_metadata_action); | |
112 | if (ret) { | |
113 | ret = CMD_ERROR; | |
114 | goto end; | |
115 | } | |
116 | ||
117 | /* Name of the action */ | |
118 | ret = mi_lttng_writer_write_element_string(writer, | |
119 | config_element_name, argv[0]); | |
120 | if (ret) { | |
121 | ret = CMD_ERROR; | |
122 | goto end; | |
123 | } | |
124 | } | |
93ec662e | 125 | command_ret = cmd->func(argc, argv); |
54897b57 JD |
126 | if (lttng_opt_mi) { |
127 | /* Close output and action element */ | |
128 | ret = mi_lttng_writer_close_element(writer); | |
129 | if (ret) { | |
130 | ret = CMD_ERROR; | |
131 | goto end; | |
132 | } | |
133 | } | |
93ec662e JD |
134 | goto end; |
135 | } | |
136 | ||
137 | cmd = &actions[i++]; | |
138 | } | |
139 | ||
140 | ret = CMD_UNDEFINED; | |
141 | ||
142 | end: | |
143 | /* Overwrite ret if an error occurred in cmd->func() */ | |
144 | ret = command_ret ? command_ret : ret; | |
145 | return ret; | |
146 | } | |
147 | ||
148 | /* | |
149 | * Metadata command handling. | |
150 | */ | |
151 | int cmd_metadata(int argc, const char **argv) | |
152 | { | |
54897b57 | 153 | int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1; |
93ec662e JD |
154 | static poptContext pc; |
155 | ||
156 | if (argc < 1) { | |
3b9c7d3f | 157 | SHOW_HELP(); |
93ec662e JD |
158 | ret = CMD_ERROR; |
159 | goto end; | |
160 | } | |
161 | ||
162 | pc = poptGetContext(NULL, argc, argv, long_options, 0); | |
163 | poptReadDefaultConfig(pc, 0); | |
164 | ||
54897b57 JD |
165 | if (lttng_opt_mi) { |
166 | writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi); | |
167 | if (!writer) { | |
168 | ret = -LTTNG_ERR_NOMEM; | |
169 | goto end; | |
170 | } | |
171 | /* Open command element */ | |
172 | ret = mi_lttng_writer_command_open(writer, | |
173 | mi_lttng_element_command_metadata); | |
174 | if (ret) { | |
175 | ret = CMD_ERROR; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | /* Open output element */ | |
180 | ret = mi_lttng_writer_open_element(writer, | |
181 | mi_lttng_element_command_output); | |
182 | if (ret) { | |
183 | ret = CMD_ERROR; | |
184 | goto end; | |
185 | } | |
186 | } | |
187 | ||
93ec662e JD |
188 | while ((opt = poptGetNextOpt(pc)) != -1) { |
189 | switch (opt) { | |
190 | case OPT_HELP: | |
3b9c7d3f | 191 | SHOW_HELP(); |
93ec662e JD |
192 | goto end; |
193 | case OPT_LIST_OPTIONS: | |
194 | list_cmd_options(stdout, long_options); | |
195 | goto end; | |
196 | case OPT_LIST_COMMANDS: | |
197 | list_commands(actions, stdout); | |
198 | goto end; | |
199 | default: | |
3b9c7d3f | 200 | SHOW_HELP(); |
93ec662e JD |
201 | ret = CMD_UNDEFINED; |
202 | goto end; | |
203 | } | |
204 | } | |
205 | ||
206 | if (!opt_session_name) { | |
207 | session_name = get_session_name(); | |
208 | if (session_name == NULL) { | |
209 | ret = CMD_ERROR; | |
210 | goto end; | |
211 | } | |
212 | } else { | |
213 | session_name = opt_session_name; | |
214 | } | |
215 | ||
216 | command_ret = handle_command(poptGetArgs(pc)); | |
217 | if (command_ret) { | |
218 | switch (-command_ret) { | |
219 | default: | |
220 | ERR("%s", lttng_strerror(command_ret)); | |
54897b57 | 221 | success = 0; |
93ec662e JD |
222 | break; |
223 | } | |
224 | } | |
225 | ||
54897b57 JD |
226 | if (lttng_opt_mi) { |
227 | /* Close output element */ | |
228 | ret = mi_lttng_writer_close_element(writer); | |
229 | if (ret) { | |
230 | ret = CMD_ERROR; | |
231 | goto end; | |
232 | } | |
233 | ||
234 | /* Success ? */ | |
235 | ret = mi_lttng_writer_write_element_bool(writer, | |
236 | mi_lttng_element_command_success, success); | |
237 | if (ret) { | |
238 | ret = CMD_ERROR; | |
239 | goto end; | |
240 | } | |
241 | ||
242 | /* Command element close */ | |
243 | ret = mi_lttng_writer_command_close(writer); | |
244 | if (ret) { | |
245 | ret = CMD_ERROR; | |
246 | goto end; | |
247 | } | |
248 | } | |
249 | ||
93ec662e | 250 | end: |
54897b57 JD |
251 | /* Mi clean-up */ |
252 | if (writer && mi_lttng_writer_destroy(writer)) { | |
253 | /* Preserve original error code */ | |
254 | ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL; | |
255 | } | |
256 | ||
93ec662e JD |
257 | if (!opt_session_name) { |
258 | free(session_name); | |
259 | } | |
260 | ||
261 | /* Overwrite ret if an error occurred during handle_command() */ | |
262 | ret = command_ret ? command_ret : ret; | |
263 | ||
264 | poptFreeContext(pc); | |
265 | return ret; | |
266 | } |